--- /dev/null
+/**
+ * drivers/net/ethernet/micrel/ksx884x.c - Micrel KSZ8841/2 PCI Ethernet driver
+ *
+ * Copyright (c) 2009-2010 Micrel, Inc.
+ * Tristram Ha <Tristram.Ha@micrel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/proc_fs.h>
+#include <linux/mii.h>
+#include <linux/platform_device.h>
+#include <linux/ethtool.h>
+#include <linux/etherdevice.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/if_vlan.h>
+#include <linux/crc32.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+
+/* DMA Registers */
+
+#define KS_DMA_TX_CTRL 0x0000
+#define DMA_TX_ENABLE 0x00000001
+#define DMA_TX_CRC_ENABLE 0x00000002
+#define DMA_TX_PAD_ENABLE 0x00000004
+#define DMA_TX_LOOPBACK 0x00000100
+#define DMA_TX_FLOW_ENABLE 0x00000200
+#define DMA_TX_CSUM_IP 0x00010000
+#define DMA_TX_CSUM_TCP 0x00020000
+#define DMA_TX_CSUM_UDP 0x00040000
+#define DMA_TX_BURST_SIZE 0x3F000000
+
+#define KS_DMA_RX_CTRL 0x0004
+#define DMA_RX_ENABLE 0x00000001
+#define KS884X_DMA_RX_MULTICAST 0x00000002
+#define DMA_RX_PROMISCUOUS 0x00000004
+#define DMA_RX_ERROR 0x00000008
+#define DMA_RX_UNICAST 0x00000010
+#define DMA_RX_ALL_MULTICAST 0x00000020
+#define DMA_RX_BROADCAST 0x00000040
+#define DMA_RX_FLOW_ENABLE 0x00000200
+#define DMA_RX_CSUM_IP 0x00010000
+#define DMA_RX_CSUM_TCP 0x00020000
+#define DMA_RX_CSUM_UDP 0x00040000
+#define DMA_RX_BURST_SIZE 0x3F000000
+
+#define DMA_BURST_SHIFT 24
+#define DMA_BURST_DEFAULT 8
+
+#define KS_DMA_TX_START 0x0008
+#define KS_DMA_RX_START 0x000C
+#define DMA_START 0x00000001
+
+#define KS_DMA_TX_ADDR 0x0010
+#define KS_DMA_RX_ADDR 0x0014
+
+#define DMA_ADDR_LIST_MASK 0xFFFFFFFC
+#define DMA_ADDR_LIST_SHIFT 2
+
+/* MTR0 */
+#define KS884X_MULTICAST_0_OFFSET 0x0020
+#define KS884X_MULTICAST_1_OFFSET 0x0021
+#define KS884X_MULTICAST_2_OFFSET 0x0022
+#define KS884x_MULTICAST_3_OFFSET 0x0023
+/* MTR1 */
+#define KS884X_MULTICAST_4_OFFSET 0x0024
+#define KS884X_MULTICAST_5_OFFSET 0x0025
+#define KS884X_MULTICAST_6_OFFSET 0x0026
+#define KS884X_MULTICAST_7_OFFSET 0x0027
+
+/* Interrupt Registers */
+
+/* INTEN */
+#define KS884X_INTERRUPTS_ENABLE 0x0028
+/* INTST */
+#define KS884X_INTERRUPTS_STATUS 0x002C
+
+#define KS884X_INT_RX_STOPPED 0x02000000
+#define KS884X_INT_TX_STOPPED 0x04000000
+#define KS884X_INT_RX_OVERRUN 0x08000000
+#define KS884X_INT_TX_EMPTY 0x10000000
+#define KS884X_INT_RX 0x20000000
+#define KS884X_INT_TX 0x40000000
+#define KS884X_INT_PHY 0x80000000
+
+#define KS884X_INT_RX_MASK \
+ (KS884X_INT_RX | KS884X_INT_RX_OVERRUN)
+#define KS884X_INT_TX_MASK \
+ (KS884X_INT_TX | KS884X_INT_TX_EMPTY)
+#define KS884X_INT_MASK (KS884X_INT_RX | KS884X_INT_TX | KS884X_INT_PHY)
+
+/* MAC Additional Station Address */
+
+/* MAAL0 */
+#define KS_ADD_ADDR_0_LO 0x0080
+/* MAAH0 */
+#define KS_ADD_ADDR_0_HI 0x0084
+/* MAAL1 */
+#define KS_ADD_ADDR_1_LO 0x0088
+/* MAAH1 */
+#define KS_ADD_ADDR_1_HI 0x008C
+/* MAAL2 */
+#define KS_ADD_ADDR_2_LO 0x0090
+/* MAAH2 */
+#define KS_ADD_ADDR_2_HI 0x0094
+/* MAAL3 */
+#define KS_ADD_ADDR_3_LO 0x0098
+/* MAAH3 */
+#define KS_ADD_ADDR_3_HI 0x009C
+/* MAAL4 */
+#define KS_ADD_ADDR_4_LO 0x00A0
+/* MAAH4 */
+#define KS_ADD_ADDR_4_HI 0x00A4
+/* MAAL5 */
+#define KS_ADD_ADDR_5_LO 0x00A8
+/* MAAH5 */
+#define KS_ADD_ADDR_5_HI 0x00AC
+/* MAAL6 */
+#define KS_ADD_ADDR_6_LO 0x00B0
+/* MAAH6 */
+#define KS_ADD_ADDR_6_HI 0x00B4
+/* MAAL7 */
+#define KS_ADD_ADDR_7_LO 0x00B8
+/* MAAH7 */
+#define KS_ADD_ADDR_7_HI 0x00BC
+/* MAAL8 */
+#define KS_ADD_ADDR_8_LO 0x00C0
+/* MAAH8 */
+#define KS_ADD_ADDR_8_HI 0x00C4
+/* MAAL9 */
+#define KS_ADD_ADDR_9_LO 0x00C8
+/* MAAH9 */
+#define KS_ADD_ADDR_9_HI 0x00CC
+/* MAAL10 */
+#define KS_ADD_ADDR_A_LO 0x00D0
+/* MAAH10 */
+#define KS_ADD_ADDR_A_HI 0x00D4
+/* MAAL11 */
+#define KS_ADD_ADDR_B_LO 0x00D8
+/* MAAH11 */
+#define KS_ADD_ADDR_B_HI 0x00DC
+/* MAAL12 */
+#define KS_ADD_ADDR_C_LO 0x00E0
+/* MAAH12 */
+#define KS_ADD_ADDR_C_HI 0x00E4
+/* MAAL13 */
+#define KS_ADD_ADDR_D_LO 0x00E8
+/* MAAH13 */
+#define KS_ADD_ADDR_D_HI 0x00EC
+/* MAAL14 */
+#define KS_ADD_ADDR_E_LO 0x00F0
+/* MAAH14 */
+#define KS_ADD_ADDR_E_HI 0x00F4
+/* MAAL15 */
+#define KS_ADD_ADDR_F_LO 0x00F8
+/* MAAH15 */
+#define KS_ADD_ADDR_F_HI 0x00FC
+
+#define ADD_ADDR_HI_MASK 0x0000FFFF
+#define ADD_ADDR_ENABLE 0x80000000
+#define ADD_ADDR_INCR 8
+
+/* Miscellaneous Registers */
+
+/* MARL */
+#define KS884X_ADDR_0_OFFSET 0x0200
+#define KS884X_ADDR_1_OFFSET 0x0201
+/* MARM */
+#define KS884X_ADDR_2_OFFSET 0x0202
+#define KS884X_ADDR_3_OFFSET 0x0203
+/* MARH */
+#define KS884X_ADDR_4_OFFSET 0x0204
+#define KS884X_ADDR_5_OFFSET 0x0205
+
+/* OBCR */
+#define KS884X_BUS_CTRL_OFFSET 0x0210
+
+#define BUS_SPEED_125_MHZ 0x0000
+#define BUS_SPEED_62_5_MHZ 0x0001
+#define BUS_SPEED_41_66_MHZ 0x0002
+#define BUS_SPEED_25_MHZ 0x0003
+
+/* EEPCR */
+#define KS884X_EEPROM_CTRL_OFFSET 0x0212
+
+#define EEPROM_CHIP_SELECT 0x0001
+#define EEPROM_SERIAL_CLOCK 0x0002
+#define EEPROM_DATA_OUT 0x0004
+#define EEPROM_DATA_IN 0x0008
+#define EEPROM_ACCESS_ENABLE 0x0010
+
+/* MBIR */
+#define KS884X_MEM_INFO_OFFSET 0x0214
+
+#define RX_MEM_TEST_FAILED 0x0008
+#define RX_MEM_TEST_FINISHED 0x0010
+#define TX_MEM_TEST_FAILED 0x0800
+#define TX_MEM_TEST_FINISHED 0x1000
+
+/* GCR */
+#define KS884X_GLOBAL_CTRL_OFFSET 0x0216
+#define GLOBAL_SOFTWARE_RESET 0x0001
+
+#define KS8841_POWER_MANAGE_OFFSET 0x0218
+
+/* WFCR */
+#define KS8841_WOL_CTRL_OFFSET 0x021A
+#define KS8841_WOL_MAGIC_ENABLE 0x0080
+#define KS8841_WOL_FRAME3_ENABLE 0x0008
+#define KS8841_WOL_FRAME2_ENABLE 0x0004
+#define KS8841_WOL_FRAME1_ENABLE 0x0002
+#define KS8841_WOL_FRAME0_ENABLE 0x0001
+
+/* WF0 */
+#define KS8841_WOL_FRAME_CRC_OFFSET 0x0220
+#define KS8841_WOL_FRAME_BYTE0_OFFSET 0x0224
+#define KS8841_WOL_FRAME_BYTE2_OFFSET 0x0228
+
+/* IACR */
+#define KS884X_IACR_P 0x04A0
+#define KS884X_IACR_OFFSET KS884X_IACR_P
+
+/* IADR1 */
+#define KS884X_IADR1_P 0x04A2
+#define KS884X_IADR2_P 0x04A4
+#define KS884X_IADR3_P 0x04A6
+#define KS884X_IADR4_P 0x04A8
+#define KS884X_IADR5_P 0x04AA
+
+#define KS884X_ACC_CTRL_SEL_OFFSET KS884X_IACR_P
+#define KS884X_ACC_CTRL_INDEX_OFFSET (KS884X_ACC_CTRL_SEL_OFFSET + 1)
+
+#define KS884X_ACC_DATA_0_OFFSET KS884X_IADR4_P
+#define KS884X_ACC_DATA_1_OFFSET (KS884X_ACC_DATA_0_OFFSET + 1)
+#define KS884X_ACC_DATA_2_OFFSET KS884X_IADR5_P
+#define KS884X_ACC_DATA_3_OFFSET (KS884X_ACC_DATA_2_OFFSET + 1)
+#define KS884X_ACC_DATA_4_OFFSET KS884X_IADR2_P
+#define KS884X_ACC_DATA_5_OFFSET (KS884X_ACC_DATA_4_OFFSET + 1)
+#define KS884X_ACC_DATA_6_OFFSET KS884X_IADR3_P
+#define KS884X_ACC_DATA_7_OFFSET (KS884X_ACC_DATA_6_OFFSET + 1)
+#define KS884X_ACC_DATA_8_OFFSET KS884X_IADR1_P
+
+/* P1MBCR */
+#define KS884X_P1MBCR_P 0x04D0
+#define KS884X_P1MBSR_P 0x04D2
+#define KS884X_PHY1ILR_P 0x04D4
+#define KS884X_PHY1IHR_P 0x04D6
+#define KS884X_P1ANAR_P 0x04D8
+#define KS884X_P1ANLPR_P 0x04DA
+
+/* P2MBCR */
+#define KS884X_P2MBCR_P 0x04E0
+#define KS884X_P2MBSR_P 0x04E2
+#define KS884X_PHY2ILR_P 0x04E4
+#define KS884X_PHY2IHR_P 0x04E6
+#define KS884X_P2ANAR_P 0x04E8
+#define KS884X_P2ANLPR_P 0x04EA
+
+#define KS884X_PHY_1_CTRL_OFFSET KS884X_P1MBCR_P
+#define PHY_CTRL_INTERVAL (KS884X_P2MBCR_P - KS884X_P1MBCR_P)
+
+#define KS884X_PHY_CTRL_OFFSET 0x00
+
+/* Mode Control Register */
+#define PHY_REG_CTRL 0
+
+#define PHY_RESET 0x8000
+#define PHY_LOOPBACK 0x4000
+#define PHY_SPEED_100MBIT 0x2000
+#define PHY_AUTO_NEG_ENABLE 0x1000
+#define PHY_POWER_DOWN 0x0800
+#define PHY_MII_DISABLE 0x0400
+#define PHY_AUTO_NEG_RESTART 0x0200
+#define PHY_FULL_DUPLEX 0x0100
+#define PHY_COLLISION_TEST 0x0080
+#define PHY_HP_MDIX 0x0020
+#define PHY_FORCE_MDIX 0x0010
+#define PHY_AUTO_MDIX_DISABLE 0x0008
+#define PHY_REMOTE_FAULT_DISABLE 0x0004
+#define PHY_TRANSMIT_DISABLE 0x0002
+#define PHY_LED_DISABLE 0x0001
+
+#define KS884X_PHY_STATUS_OFFSET 0x02
+
+/* Mode Status Register */
+#define PHY_REG_STATUS 1
+
+#define PHY_100BT4_CAPABLE 0x8000
+#define PHY_100BTX_FD_CAPABLE 0x4000
+#define PHY_100BTX_CAPABLE 0x2000
+#define PHY_10BT_FD_CAPABLE 0x1000
+#define PHY_10BT_CAPABLE 0x0800
+#define PHY_MII_SUPPRESS_CAPABLE 0x0040
+#define PHY_AUTO_NEG_ACKNOWLEDGE 0x0020
+#define PHY_REMOTE_FAULT 0x0010
+#define PHY_AUTO_NEG_CAPABLE 0x0008
+#define PHY_LINK_STATUS 0x0004
+#define PHY_JABBER_DETECT 0x0002
+#define PHY_EXTENDED_CAPABILITY 0x0001
+
+#define KS884X_PHY_ID_1_OFFSET 0x04
+#define KS884X_PHY_ID_2_OFFSET 0x06
+
+/* PHY Identifier Registers */
+#define PHY_REG_ID_1 2
+#define PHY_REG_ID_2 3
+
+#define KS884X_PHY_AUTO_NEG_OFFSET 0x08
+
+/* Auto-Negotiation Advertisement Register */
+#define PHY_REG_AUTO_NEGOTIATION 4
+
+#define PHY_AUTO_NEG_NEXT_PAGE 0x8000
+#define PHY_AUTO_NEG_REMOTE_FAULT 0x2000
+/* Not supported. */
+#define PHY_AUTO_NEG_ASYM_PAUSE 0x0800
+#define PHY_AUTO_NEG_SYM_PAUSE 0x0400
+#define PHY_AUTO_NEG_100BT4 0x0200
+#define PHY_AUTO_NEG_100BTX_FD 0x0100
+#define PHY_AUTO_NEG_100BTX 0x0080
+#define PHY_AUTO_NEG_10BT_FD 0x0040
+#define PHY_AUTO_NEG_10BT 0x0020
+#define PHY_AUTO_NEG_SELECTOR 0x001F
+#define PHY_AUTO_NEG_802_3 0x0001
+
+#define PHY_AUTO_NEG_PAUSE (PHY_AUTO_NEG_SYM_PAUSE | PHY_AUTO_NEG_ASYM_PAUSE)
+
+#define KS884X_PHY_REMOTE_CAP_OFFSET 0x0A
+
+/* Auto-Negotiation Link Partner Ability Register */
+#define PHY_REG_REMOTE_CAPABILITY 5
+
+#define PHY_REMOTE_NEXT_PAGE 0x8000
+#define PHY_REMOTE_ACKNOWLEDGE 0x4000
+#define PHY_REMOTE_REMOTE_FAULT 0x2000
+#define PHY_REMOTE_SYM_PAUSE 0x0400
+#define PHY_REMOTE_100BTX_FD 0x0100
+#define PHY_REMOTE_100BTX 0x0080
+#define PHY_REMOTE_10BT_FD 0x0040
+#define PHY_REMOTE_10BT 0x0020
+
+/* P1VCT */
+#define KS884X_P1VCT_P 0x04F0
+#define KS884X_P1PHYCTRL_P 0x04F2
+
+/* P2VCT */
+#define KS884X_P2VCT_P 0x04F4
+#define KS884X_P2PHYCTRL_P 0x04F6
+
+#define KS884X_PHY_SPECIAL_OFFSET KS884X_P1VCT_P
+#define PHY_SPECIAL_INTERVAL (KS884X_P2VCT_P - KS884X_P1VCT_P)
+
+#define KS884X_PHY_LINK_MD_OFFSET 0x00
+
+#define PHY_START_CABLE_DIAG 0x8000
+#define PHY_CABLE_DIAG_RESULT 0x6000
+#define PHY_CABLE_STAT_NORMAL 0x0000
+#define PHY_CABLE_STAT_OPEN 0x2000
+#define PHY_CABLE_STAT_SHORT 0x4000
+#define PHY_CABLE_STAT_FAILED 0x6000
+#define PHY_CABLE_10M_SHORT 0x1000
+#define PHY_CABLE_FAULT_COUNTER 0x01FF
+
+#define KS884X_PHY_PHY_CTRL_OFFSET 0x02
+
+#define PHY_STAT_REVERSED_POLARITY 0x0020
+#define PHY_STAT_MDIX 0x0010
+#define PHY_FORCE_LINK 0x0008
+#define PHY_POWER_SAVING_DISABLE 0x0004
+#define PHY_REMOTE_LOOPBACK 0x0002
+
+/* SIDER */
+#define KS884X_SIDER_P 0x0400
+#define KS884X_CHIP_ID_OFFSET KS884X_SIDER_P
+#define KS884X_FAMILY_ID_OFFSET (KS884X_CHIP_ID_OFFSET + 1)
+
+#define REG_FAMILY_ID 0x88
+
+#define REG_CHIP_ID_41 0x8810
+#define REG_CHIP_ID_42 0x8800
+
+#define KS884X_CHIP_ID_MASK_41 0xFF10
+#define KS884X_CHIP_ID_MASK 0xFFF0
+#define KS884X_CHIP_ID_SHIFT 4
+#define KS884X_REVISION_MASK 0x000E
+#define KS884X_REVISION_SHIFT 1
+#define KS8842_START 0x0001
+
+#define CHIP_IP_41_M 0x8810
+#define CHIP_IP_42_M 0x8800
+#define CHIP_IP_61_M 0x8890
+#define CHIP_IP_62_M 0x8880
+
+#define CHIP_IP_41_P 0x8850
+#define CHIP_IP_42_P 0x8840
+#define CHIP_IP_61_P 0x88D0
+#define CHIP_IP_62_P 0x88C0
+
+/* SGCR1 */
+#define KS8842_SGCR1_P 0x0402
+#define KS8842_SWITCH_CTRL_1_OFFSET KS8842_SGCR1_P
+
+#define SWITCH_PASS_ALL 0x8000
+#define SWITCH_TX_FLOW_CTRL 0x2000
+#define SWITCH_RX_FLOW_CTRL 0x1000
+#define SWITCH_CHECK_LENGTH 0x0800
+#define SWITCH_AGING_ENABLE 0x0400
+#define SWITCH_FAST_AGING 0x0200
+#define SWITCH_AGGR_BACKOFF 0x0100
+#define SWITCH_PASS_PAUSE 0x0008
+#define SWITCH_LINK_AUTO_AGING 0x0001
+
+/* SGCR2 */
+#define KS8842_SGCR2_P 0x0404
+#define KS8842_SWITCH_CTRL_2_OFFSET KS8842_SGCR2_P
+
+#define SWITCH_VLAN_ENABLE 0x8000
+#define SWITCH_IGMP_SNOOP 0x4000
+#define IPV6_MLD_SNOOP_ENABLE 0x2000
+#define IPV6_MLD_SNOOP_OPTION 0x1000
+#define PRIORITY_SCHEME_SELECT 0x0800
+#define SWITCH_MIRROR_RX_TX 0x0100
+#define UNICAST_VLAN_BOUNDARY 0x0080
+#define MULTICAST_STORM_DISABLE 0x0040
+#define SWITCH_BACK_PRESSURE 0x0020
+#define FAIR_FLOW_CTRL 0x0010
+#define NO_EXC_COLLISION_DROP 0x0008
+#define SWITCH_HUGE_PACKET 0x0004
+#define SWITCH_LEGAL_PACKET 0x0002
+#define SWITCH_BUF_RESERVE 0x0001
+
+/* SGCR3 */
+#define KS8842_SGCR3_P 0x0406
+#define KS8842_SWITCH_CTRL_3_OFFSET KS8842_SGCR3_P
+
+#define BROADCAST_STORM_RATE_LO 0xFF00
+#define SWITCH_REPEATER 0x0080
+#define SWITCH_HALF_DUPLEX 0x0040
+#define SWITCH_FLOW_CTRL 0x0020
+#define SWITCH_10_MBIT 0x0010
+#define SWITCH_REPLACE_NULL_VID 0x0008
+#define BROADCAST_STORM_RATE_HI 0x0007
+
+#define BROADCAST_STORM_RATE 0x07FF
+
+/* SGCR4 */
+#define KS8842_SGCR4_P 0x0408
+
+/* SGCR5 */
+#define KS8842_SGCR5_P 0x040A
+#define KS8842_SWITCH_CTRL_5_OFFSET KS8842_SGCR5_P
+
+#define LED_MODE 0x8200
+#define LED_SPEED_DUPLEX_ACT 0x0000
+#define LED_SPEED_DUPLEX_LINK_ACT 0x8000
+#define LED_DUPLEX_10_100 0x0200
+
+/* SGCR6 */
+#define KS8842_SGCR6_P 0x0410
+#define KS8842_SWITCH_CTRL_6_OFFSET KS8842_SGCR6_P
+
+#define KS8842_PRIORITY_MASK 3
+#define KS8842_PRIORITY_SHIFT 2
+
+/* SGCR7 */
+#define KS8842_SGCR7_P 0x0412
+#define KS8842_SWITCH_CTRL_7_OFFSET KS8842_SGCR7_P
+
+#define SWITCH_UNK_DEF_PORT_ENABLE 0x0008
+#define SWITCH_UNK_DEF_PORT_3 0x0004
+#define SWITCH_UNK_DEF_PORT_2 0x0002
+#define SWITCH_UNK_DEF_PORT_1 0x0001
+
+/* MACAR1 */
+#define KS8842_MACAR1_P 0x0470
+#define KS8842_MACAR2_P 0x0472
+#define KS8842_MACAR3_P 0x0474
+#define KS8842_MAC_ADDR_1_OFFSET KS8842_MACAR1_P
+#define KS8842_MAC_ADDR_0_OFFSET (KS8842_MAC_ADDR_1_OFFSET + 1)
+#define KS8842_MAC_ADDR_3_OFFSET KS8842_MACAR2_P
+#define KS8842_MAC_ADDR_2_OFFSET (KS8842_MAC_ADDR_3_OFFSET + 1)
+#define KS8842_MAC_ADDR_5_OFFSET KS8842_MACAR3_P
+#define KS8842_MAC_ADDR_4_OFFSET (KS8842_MAC_ADDR_5_OFFSET + 1)
+
+/* TOSR1 */
+#define KS8842_TOSR1_P 0x0480
+#define KS8842_TOSR2_P 0x0482
+#define KS8842_TOSR3_P 0x0484
+#define KS8842_TOSR4_P 0x0486
+#define KS8842_TOSR5_P 0x0488
+#define KS8842_TOSR6_P 0x048A
+#define KS8842_TOSR7_P 0x0490
+#define KS8842_TOSR8_P 0x0492
+#define KS8842_TOS_1_OFFSET KS8842_TOSR1_P
+#define KS8842_TOS_2_OFFSET KS8842_TOSR2_P
+#define KS8842_TOS_3_OFFSET KS8842_TOSR3_P
+#define KS8842_TOS_4_OFFSET KS8842_TOSR4_P
+#define KS8842_TOS_5_OFFSET KS8842_TOSR5_P
+#define KS8842_TOS_6_OFFSET KS8842_TOSR6_P
+
+#define KS8842_TOS_7_OFFSET KS8842_TOSR7_P
+#define KS8842_TOS_8_OFFSET KS8842_TOSR8_P
+
+/* P1CR1 */
+#define KS8842_P1CR1_P 0x0500
+#define KS8842_P1CR2_P 0x0502
+#define KS8842_P1VIDR_P 0x0504
+#define KS8842_P1CR3_P 0x0506
+#define KS8842_P1IRCR_P 0x0508
+#define KS8842_P1ERCR_P 0x050A
+#define KS884X_P1SCSLMD_P 0x0510
+#define KS884X_P1CR4_P 0x0512
+#define KS884X_P1SR_P 0x0514
+
+/* P2CR1 */
+#define KS8842_P2CR1_P 0x0520
+#define KS8842_P2CR2_P 0x0522
+#define KS8842_P2VIDR_P 0x0524
+#define KS8842_P2CR3_P 0x0526
+#define KS8842_P2IRCR_P 0x0528
+#define KS8842_P2ERCR_P 0x052A
+#define KS884X_P2SCSLMD_P 0x0530
+#define KS884X_P2CR4_P 0x0532
+#define KS884X_P2SR_P 0x0534
+
+/* P3CR1 */
+#define KS8842_P3CR1_P 0x0540
+#define KS8842_P3CR2_P 0x0542
+#define KS8842_P3VIDR_P 0x0544
+#define KS8842_P3CR3_P 0x0546
+#define KS8842_P3IRCR_P 0x0548
+#define KS8842_P3ERCR_P 0x054A
+
+#define KS8842_PORT_1_CTRL_1 KS8842_P1CR1_P
+#define KS8842_PORT_2_CTRL_1 KS8842_P2CR1_P
+#define KS8842_PORT_3_CTRL_1 KS8842_P3CR1_P
+
+#define PORT_CTRL_ADDR(port, addr) \
+ (addr = KS8842_PORT_1_CTRL_1 + (port) * \
+ (KS8842_PORT_2_CTRL_1 - KS8842_PORT_1_CTRL_1))
+
+#define KS8842_PORT_CTRL_1_OFFSET 0x00
+
+#define PORT_BROADCAST_STORM 0x0080
+#define PORT_DIFFSERV_ENABLE 0x0040
+#define PORT_802_1P_ENABLE 0x0020
+#define PORT_BASED_PRIORITY_MASK 0x0018
+#define PORT_BASED_PRIORITY_BASE 0x0003
+#define PORT_BASED_PRIORITY_SHIFT 3
+#define PORT_BASED_PRIORITY_0 0x0000
+#define PORT_BASED_PRIORITY_1 0x0008
+#define PORT_BASED_PRIORITY_2 0x0010
+#define PORT_BASED_PRIORITY_3 0x0018
+#define PORT_INSERT_TAG 0x0004
+#define PORT_REMOVE_TAG 0x0002
+#define PORT_PRIO_QUEUE_ENABLE 0x0001
+
+#define KS8842_PORT_CTRL_2_OFFSET 0x02
+
+#define PORT_INGRESS_VLAN_FILTER 0x4000
+#define PORT_DISCARD_NON_VID 0x2000
+#define PORT_FORCE_FLOW_CTRL 0x1000
+#define PORT_BACK_PRESSURE 0x0800
+#define PORT_TX_ENABLE 0x0400
+#define PORT_RX_ENABLE 0x0200
+#define PORT_LEARN_DISABLE 0x0100
+#define PORT_MIRROR_SNIFFER 0x0080
+#define PORT_MIRROR_RX 0x0040
+#define PORT_MIRROR_TX 0x0020
+#define PORT_USER_PRIORITY_CEILING 0x0008
+#define PORT_VLAN_MEMBERSHIP 0x0007
+
+#define KS8842_PORT_CTRL_VID_OFFSET 0x04
+
+#define PORT_DEFAULT_VID 0x0001
+
+#define KS8842_PORT_CTRL_3_OFFSET 0x06
+
+#define PORT_INGRESS_LIMIT_MODE 0x000C
+#define PORT_INGRESS_ALL 0x0000
+#define PORT_INGRESS_UNICAST 0x0004
+#define PORT_INGRESS_MULTICAST 0x0008
+#define PORT_INGRESS_BROADCAST 0x000C
+#define PORT_COUNT_IFG 0x0002
+#define PORT_COUNT_PREAMBLE 0x0001
+
+#define KS8842_PORT_IN_RATE_OFFSET 0x08
+#define KS8842_PORT_OUT_RATE_OFFSET 0x0A
+
+#define PORT_PRIORITY_RATE 0x0F
+#define PORT_PRIORITY_RATE_SHIFT 4
+
+#define KS884X_PORT_LINK_MD 0x10
+
+#define PORT_CABLE_10M_SHORT 0x8000
+#define PORT_CABLE_DIAG_RESULT 0x6000
+#define PORT_CABLE_STAT_NORMAL 0x0000
+#define PORT_CABLE_STAT_OPEN 0x2000
+#define PORT_CABLE_STAT_SHORT 0x4000
+#define PORT_CABLE_STAT_FAILED 0x6000
+#define PORT_START_CABLE_DIAG 0x1000
+#define PORT_FORCE_LINK 0x0800
+#define PORT_POWER_SAVING_DISABLE 0x0400
+#define PORT_PHY_REMOTE_LOOPBACK 0x0200
+#define PORT_CABLE_FAULT_COUNTER 0x01FF
+
+#define KS884X_PORT_CTRL_4_OFFSET 0x12
+
+#define PORT_LED_OFF 0x8000
+#define PORT_TX_DISABLE 0x4000
+#define PORT_AUTO_NEG_RESTART 0x2000
+#define PORT_REMOTE_FAULT_DISABLE 0x1000
+#define PORT_POWER_DOWN 0x0800
+#define PORT_AUTO_MDIX_DISABLE 0x0400
+#define PORT_FORCE_MDIX 0x0200
+#define PORT_LOOPBACK 0x0100
+#define PORT_AUTO_NEG_ENABLE 0x0080
+#define PORT_FORCE_100_MBIT 0x0040
+#define PORT_FORCE_FULL_DUPLEX 0x0020
+#define PORT_AUTO_NEG_SYM_PAUSE 0x0010
+#define PORT_AUTO_NEG_100BTX_FD 0x0008
+#define PORT_AUTO_NEG_100BTX 0x0004
+#define PORT_AUTO_NEG_10BT_FD 0x0002
+#define PORT_AUTO_NEG_10BT 0x0001
+
+#define KS884X_PORT_STATUS_OFFSET 0x14
+
+#define PORT_HP_MDIX 0x8000
+#define PORT_REVERSED_POLARITY 0x2000
+#define PORT_RX_FLOW_CTRL 0x0800
+#define PORT_TX_FLOW_CTRL 0x1000
+#define PORT_STATUS_SPEED_100MBIT 0x0400
+#define PORT_STATUS_FULL_DUPLEX 0x0200
+#define PORT_REMOTE_FAULT 0x0100
+#define PORT_MDIX_STATUS 0x0080
+#define PORT_AUTO_NEG_COMPLETE 0x0040
+#define PORT_STATUS_LINK_GOOD 0x0020
+#define PORT_REMOTE_SYM_PAUSE 0x0010
+#define PORT_REMOTE_100BTX_FD 0x0008
+#define PORT_REMOTE_100BTX 0x0004
+#define PORT_REMOTE_10BT_FD 0x0002
+#define PORT_REMOTE_10BT 0x0001
+
+/*
+#define STATIC_MAC_TABLE_ADDR 00-0000FFFF-FFFFFFFF
+#define STATIC_MAC_TABLE_FWD_PORTS 00-00070000-00000000
+#define STATIC_MAC_TABLE_VALID 00-00080000-00000000
+#define STATIC_MAC_TABLE_OVERRIDE 00-00100000-00000000
+#define STATIC_MAC_TABLE_USE_FID 00-00200000-00000000
+#define STATIC_MAC_TABLE_FID 00-03C00000-00000000
+*/
+
+#define STATIC_MAC_TABLE_ADDR 0x0000FFFF
+#define STATIC_MAC_TABLE_FWD_PORTS 0x00070000
+#define STATIC_MAC_TABLE_VALID 0x00080000
+#define STATIC_MAC_TABLE_OVERRIDE 0x00100000
+#define STATIC_MAC_TABLE_USE_FID 0x00200000
+#define STATIC_MAC_TABLE_FID 0x03C00000
+
+#define STATIC_MAC_FWD_PORTS_SHIFT 16
+#define STATIC_MAC_FID_SHIFT 22
+
+/*
+#define VLAN_TABLE_VID 00-00000000-00000FFF
+#define VLAN_TABLE_FID 00-00000000-0000F000
+#define VLAN_TABLE_MEMBERSHIP 00-00000000-00070000
+#define VLAN_TABLE_VALID 00-00000000-00080000
+*/
+
+#define VLAN_TABLE_VID 0x00000FFF
+#define VLAN_TABLE_FID 0x0000F000
+#define VLAN_TABLE_MEMBERSHIP 0x00070000
+#define VLAN_TABLE_VALID 0x00080000
+
+#define VLAN_TABLE_FID_SHIFT 12
+#define VLAN_TABLE_MEMBERSHIP_SHIFT 16
+
+/*
+#define DYNAMIC_MAC_TABLE_ADDR 00-0000FFFF-FFFFFFFF
+#define DYNAMIC_MAC_TABLE_FID 00-000F0000-00000000
+#define DYNAMIC_MAC_TABLE_SRC_PORT 00-00300000-00000000
+#define DYNAMIC_MAC_TABLE_TIMESTAMP 00-00C00000-00000000
+#define DYNAMIC_MAC_TABLE_ENTRIES 03-FF000000-00000000
+#define DYNAMIC_MAC_TABLE_MAC_EMPTY 04-00000000-00000000
+#define DYNAMIC_MAC_TABLE_RESERVED 78-00000000-00000000
+#define DYNAMIC_MAC_TABLE_NOT_READY 80-00000000-00000000
+*/
+
+#define DYNAMIC_MAC_TABLE_ADDR 0x0000FFFF
+#define DYNAMIC_MAC_TABLE_FID 0x000F0000
+#define DYNAMIC_MAC_TABLE_SRC_PORT 0x00300000
+#define DYNAMIC_MAC_TABLE_TIMESTAMP 0x00C00000
+#define DYNAMIC_MAC_TABLE_ENTRIES 0xFF000000
+
+#define DYNAMIC_MAC_TABLE_ENTRIES_H 0x03
+#define DYNAMIC_MAC_TABLE_MAC_EMPTY 0x04
+#define DYNAMIC_MAC_TABLE_RESERVED 0x78
+#define DYNAMIC_MAC_TABLE_NOT_READY 0x80
+
+#define DYNAMIC_MAC_FID_SHIFT 16
+#define DYNAMIC_MAC_SRC_PORT_SHIFT 20
+#define DYNAMIC_MAC_TIMESTAMP_SHIFT 22
+#define DYNAMIC_MAC_ENTRIES_SHIFT 24
+#define DYNAMIC_MAC_ENTRIES_H_SHIFT 8
+
+/*
+#define MIB_COUNTER_VALUE 00-00000000-3FFFFFFF
+#define MIB_COUNTER_VALID 00-00000000-40000000
+#define MIB_COUNTER_OVERFLOW 00-00000000-80000000
+*/
+
+#define MIB_COUNTER_VALUE 0x3FFFFFFF
+#define MIB_COUNTER_VALID 0x40000000
+#define MIB_COUNTER_OVERFLOW 0x80000000
+
+#define MIB_PACKET_DROPPED 0x0000FFFF
+
+#define KS_MIB_PACKET_DROPPED_TX_0 0x100
+#define KS_MIB_PACKET_DROPPED_TX_1 0x101
+#define KS_MIB_PACKET_DROPPED_TX 0x102
+#define KS_MIB_PACKET_DROPPED_RX_0 0x103
+#define KS_MIB_PACKET_DROPPED_RX_1 0x104
+#define KS_MIB_PACKET_DROPPED_RX 0x105
+
+/* Change default LED mode. */
+#define SET_DEFAULT_LED LED_SPEED_DUPLEX_ACT
+
+#define MAC_ADDR_ORDER(i) (ETH_ALEN - 1 - (i))
+
+#define MAX_ETHERNET_BODY_SIZE 1500
+#define ETHERNET_HEADER_SIZE (14 + VLAN_HLEN)
+
+#define MAX_ETHERNET_PACKET_SIZE \
+ (MAX_ETHERNET_BODY_SIZE + ETHERNET_HEADER_SIZE)
+
+#define REGULAR_RX_BUF_SIZE (MAX_ETHERNET_PACKET_SIZE + 4)
+#define MAX_RX_BUF_SIZE (1912 + 4)
+
+#define ADDITIONAL_ENTRIES 16
+#define MAX_MULTICAST_LIST 32
+
+#define HW_MULTICAST_SIZE 8
+
+#define HW_TO_DEV_PORT(port) (port - 1)
+
+enum {
+ media_connected,
+ media_disconnected
+};
+
+enum {
+ OID_COUNTER_UNKOWN,
+
+ OID_COUNTER_FIRST,
+
+ /* total transmit errors */
+ OID_COUNTER_XMIT_ERROR,
+
+ /* total receive errors */
+ OID_COUNTER_RCV_ERROR,
+
+ OID_COUNTER_LAST
+};
+
+/*
+ * Hardware descriptor definitions
+ */
+
+#define DESC_ALIGNMENT 16
+#define BUFFER_ALIGNMENT 8
+
+#define NUM_OF_RX_DESC 64
+#define NUM_OF_TX_DESC 64
+
+#define KS_DESC_RX_FRAME_LEN 0x000007FF
+#define KS_DESC_RX_FRAME_TYPE 0x00008000
+#define KS_DESC_RX_ERROR_CRC 0x00010000
+#define KS_DESC_RX_ERROR_RUNT 0x00020000
+#define KS_DESC_RX_ERROR_TOO_LONG 0x00040000
+#define KS_DESC_RX_ERROR_PHY 0x00080000
+#define KS884X_DESC_RX_PORT_MASK 0x00300000
+#define KS_DESC_RX_MULTICAST 0x01000000
+#define KS_DESC_RX_ERROR 0x02000000
+#define KS_DESC_RX_ERROR_CSUM_UDP 0x04000000
+#define KS_DESC_RX_ERROR_CSUM_TCP 0x08000000
+#define KS_DESC_RX_ERROR_CSUM_IP 0x10000000
+#define KS_DESC_RX_LAST 0x20000000
+#define KS_DESC_RX_FIRST 0x40000000
+#define KS_DESC_RX_ERROR_COND \
+ (KS_DESC_RX_ERROR_CRC | \
+ KS_DESC_RX_ERROR_RUNT | \
+ KS_DESC_RX_ERROR_PHY | \
+ KS_DESC_RX_ERROR_TOO_LONG)
+
+#define KS_DESC_HW_OWNED 0x80000000
+
+#define KS_DESC_BUF_SIZE 0x000007FF
+#define KS884X_DESC_TX_PORT_MASK 0x00300000
+#define KS_DESC_END_OF_RING 0x02000000
+#define KS_DESC_TX_CSUM_GEN_UDP 0x04000000
+#define KS_DESC_TX_CSUM_GEN_TCP 0x08000000
+#define KS_DESC_TX_CSUM_GEN_IP 0x10000000
+#define KS_DESC_TX_LAST 0x20000000
+#define KS_DESC_TX_FIRST 0x40000000
+#define KS_DESC_TX_INTERRUPT 0x80000000
+
+#define KS_DESC_PORT_SHIFT 20
+
+#define KS_DESC_RX_MASK (KS_DESC_BUF_SIZE)
+
+#define KS_DESC_TX_MASK \
+ (KS_DESC_TX_INTERRUPT | \
+ KS_DESC_TX_FIRST | \
+ KS_DESC_TX_LAST | \
+ KS_DESC_TX_CSUM_GEN_IP | \
+ KS_DESC_TX_CSUM_GEN_TCP | \
+ KS_DESC_TX_CSUM_GEN_UDP | \
+ KS_DESC_BUF_SIZE)
+
+struct ksz_desc_rx_stat {
+#ifdef __BIG_ENDIAN_BITFIELD
+ u32 hw_owned:1;
+ u32 first_desc:1;
+ u32 last_desc:1;
+ u32 csum_err_ip:1;
+ u32 csum_err_tcp:1;
+ u32 csum_err_udp:1;
+ u32 error:1;
+ u32 multicast:1;
+ u32 src_port:4;
+ u32 err_phy:1;
+ u32 err_too_long:1;
+ u32 err_runt:1;
+ u32 err_crc:1;
+ u32 frame_type:1;
+ u32 reserved1:4;
+ u32 frame_len:11;
+#else
+ u32 frame_len:11;
+ u32 reserved1:4;
+ u32 frame_type:1;
+ u32 err_crc:1;
+ u32 err_runt:1;
+ u32 err_too_long:1;
+ u32 err_phy:1;
+ u32 src_port:4;
+ u32 multicast:1;
+ u32 error:1;
+ u32 csum_err_udp:1;
+ u32 csum_err_tcp:1;
+ u32 csum_err_ip:1;
+ u32 last_desc:1;
+ u32 first_desc:1;
+ u32 hw_owned:1;
+#endif
+};
+
+struct ksz_desc_tx_stat {
+#ifdef __BIG_ENDIAN_BITFIELD
+ u32 hw_owned:1;
+ u32 reserved1:31;
+#else
+ u32 reserved1:31;
+ u32 hw_owned:1;
+#endif
+};
+
+struct ksz_desc_rx_buf {
+#ifdef __BIG_ENDIAN_BITFIELD
+ u32 reserved4:6;
+ u32 end_of_ring:1;
+ u32 reserved3:14;
+ u32 buf_size:11;
+#else
+ u32 buf_size:11;
+ u32 reserved3:14;
+ u32 end_of_ring:1;
+ u32 reserved4:6;
+#endif
+};
+
+struct ksz_desc_tx_buf {
+#ifdef __BIG_ENDIAN_BITFIELD
+ u32 intr:1;
+ u32 first_seg:1;
+ u32 last_seg:1;
+ u32 csum_gen_ip:1;
+ u32 csum_gen_tcp:1;
+ u32 csum_gen_udp:1;
+ u32 end_of_ring:1;
+ u32 reserved4:1;
+ u32 dest_port:4;
+ u32 reserved3:9;
+ u32 buf_size:11;
+#else
+ u32 buf_size:11;
+ u32 reserved3:9;
+ u32 dest_port:4;
+ u32 reserved4:1;
+ u32 end_of_ring:1;
+ u32 csum_gen_udp:1;
+ u32 csum_gen_tcp:1;
+ u32 csum_gen_ip:1;
+ u32 last_seg:1;
+ u32 first_seg:1;
+ u32 intr:1;
+#endif
+};
+
+union desc_stat {
+ struct ksz_desc_rx_stat rx;
+ struct ksz_desc_tx_stat tx;
+ u32 data;
+};
+
+union desc_buf {
+ struct ksz_desc_rx_buf rx;
+ struct ksz_desc_tx_buf tx;
+ u32 data;
+};
+
+/**
+ * struct ksz_hw_desc - Hardware descriptor data structure
+ * @ctrl: Descriptor control value.
+ * @buf: Descriptor buffer value.
+ * @addr: Physical address of memory buffer.
+ * @next: Pointer to next hardware descriptor.
+ */
+struct ksz_hw_desc {
+ union desc_stat ctrl;
+ union desc_buf buf;
+ u32 addr;
+ u32 next;
+};
+
+/**
+ * struct ksz_sw_desc - Software descriptor data structure
+ * @ctrl: Descriptor control value.
+ * @buf: Descriptor buffer value.
+ * @buf_size: Current buffers size value in hardware descriptor.
+ */
+struct ksz_sw_desc {
+ union desc_stat ctrl;
+ union desc_buf buf;
+ u32 buf_size;
+};
+
+/**
+ * struct ksz_dma_buf - OS dependent DMA buffer data structure
+ * @skb: Associated socket buffer.
+ * @dma: Associated physical DMA address.
+ * len: Actual len used.
+ */
+struct ksz_dma_buf {
+ struct sk_buff *skb;
+ dma_addr_t dma;
+ int len;
+};
+
+/**
+ * struct ksz_desc - Descriptor structure
+ * @phw: Hardware descriptor pointer to uncached physical memory.
+ * @sw: Cached memory to hold hardware descriptor values for
+ * manipulation.
+ * @dma_buf: Operating system dependent data structure to hold physical
+ * memory buffer allocation information.
+ */
+struct ksz_desc {
+ struct ksz_hw_desc *phw;
+ struct ksz_sw_desc sw;
+ struct ksz_dma_buf dma_buf;
+};
+
+#define DMA_BUFFER(desc) ((struct ksz_dma_buf *)(&(desc)->dma_buf))
+
+/**
+ * struct ksz_desc_info - Descriptor information data structure
+ * @ring: First descriptor in the ring.
+ * @cur: Current descriptor being manipulated.
+ * @ring_virt: First hardware descriptor in the ring.
+ * @ring_phys: The physical address of the first descriptor of the ring.
+ * @size: Size of hardware descriptor.
+ * @alloc: Number of descriptors allocated.
+ * @avail: Number of descriptors available for use.
+ * @last: Index for last descriptor released to hardware.
+ * @next: Index for next descriptor available for use.
+ * @mask: Mask for index wrapping.
+ */
+struct ksz_desc_info {
+ struct ksz_desc *ring;
+ struct ksz_desc *cur;
+ struct ksz_hw_desc *ring_virt;
+ u32 ring_phys;
+ int size;
+ int alloc;
+ int avail;
+ int last;
+ int next;
+ int mask;
+};
+
+/*
+ * KSZ8842 switch definitions
+ */
+
+enum {
+ TABLE_STATIC_MAC = 0,
+ TABLE_VLAN,
+ TABLE_DYNAMIC_MAC,
+ TABLE_MIB
+};
+
+#define LEARNED_MAC_TABLE_ENTRIES 1024
+#define STATIC_MAC_TABLE_ENTRIES 8
+
+/**
+ * struct ksz_mac_table - Static MAC table data structure
+ * @mac_addr: MAC address to filter.
+ * @vid: VID value.
+ * @fid: FID value.
+ * @ports: Port membership.
+ * @override: Override setting.
+ * @use_fid: FID use setting.
+ * @valid: Valid setting indicating the entry is being used.
+ */
+struct ksz_mac_table {
+ u8 mac_addr[ETH_ALEN];
+ u16 vid;
+ u8 fid;
+ u8 ports;
+ u8 override:1;
+ u8 use_fid:1;
+ u8 valid:1;
+};
+
+#define VLAN_TABLE_ENTRIES 16
+
+/**
+ * struct ksz_vlan_table - VLAN table data structure
+ * @vid: VID value.
+ * @fid: FID value.
+ * @member: Port membership.
+ */
+struct ksz_vlan_table {
+ u16 vid;
+ u8 fid;
+ u8 member;
+};
+
+#define DIFFSERV_ENTRIES 64
+#define PRIO_802_1P_ENTRIES 8
+#define PRIO_QUEUES 4
+
+#define SWITCH_PORT_NUM 2
+#define TOTAL_PORT_NUM (SWITCH_PORT_NUM + 1)
+#define HOST_MASK (1 << SWITCH_PORT_NUM)
+#define PORT_MASK 7
+
+#define MAIN_PORT 0
+#define OTHER_PORT 1
+#define HOST_PORT SWITCH_PORT_NUM
+
+#define PORT_COUNTER_NUM 0x20
+#define TOTAL_PORT_COUNTER_NUM (PORT_COUNTER_NUM + 2)
+
+#define MIB_COUNTER_RX_LO_PRIORITY 0x00
+#define MIB_COUNTER_RX_HI_PRIORITY 0x01
+#define MIB_COUNTER_RX_UNDERSIZE 0x02
+#define MIB_COUNTER_RX_FRAGMENT 0x03
+#define MIB_COUNTER_RX_OVERSIZE 0x04
+#define MIB_COUNTER_RX_JABBER 0x05
+#define MIB_COUNTER_RX_SYMBOL_ERR 0x06
+#define MIB_COUNTER_RX_CRC_ERR 0x07
+#define MIB_COUNTER_RX_ALIGNMENT_ERR 0x08
+#define MIB_COUNTER_RX_CTRL_8808 0x09
+#define MIB_COUNTER_RX_PAUSE 0x0A
+#define MIB_COUNTER_RX_BROADCAST 0x0B
+#define MIB_COUNTER_RX_MULTICAST 0x0C
+#define MIB_COUNTER_RX_UNICAST 0x0D
+#define MIB_COUNTER_RX_OCTET_64 0x0E
+#define MIB_COUNTER_RX_OCTET_65_127 0x0F
+#define MIB_COUNTER_RX_OCTET_128_255 0x10
+#define MIB_COUNTER_RX_OCTET_256_511 0x11
+#define MIB_COUNTER_RX_OCTET_512_1023 0x12
+#define MIB_COUNTER_RX_OCTET_1024_1522 0x13
+#define MIB_COUNTER_TX_LO_PRIORITY 0x14
+#define MIB_COUNTER_TX_HI_PRIORITY 0x15
+#define MIB_COUNTER_TX_LATE_COLLISION 0x16
+#define MIB_COUNTER_TX_PAUSE 0x17
+#define MIB_COUNTER_TX_BROADCAST 0x18
+#define MIB_COUNTER_TX_MULTICAST 0x19
+#define MIB_COUNTER_TX_UNICAST 0x1A
+#define MIB_COUNTER_TX_DEFERRED 0x1B
+#define MIB_COUNTER_TX_TOTAL_COLLISION 0x1C
+#define MIB_COUNTER_TX_EXCESS_COLLISION 0x1D
+#define MIB_COUNTER_TX_SINGLE_COLLISION 0x1E
+#define MIB_COUNTER_TX_MULTI_COLLISION 0x1F
+
+#define MIB_COUNTER_RX_DROPPED_PACKET 0x20
+#define MIB_COUNTER_TX_DROPPED_PACKET 0x21
+
+/**
+ * struct ksz_port_mib - Port MIB data structure
+ * @cnt_ptr: Current pointer to MIB counter index.
+ * @link_down: Indication the link has just gone down.
+ * @state: Connection status of the port.
+ * @mib_start: The starting counter index. Some ports do not start at 0.
+ * @counter: 64-bit MIB counter value.
+ * @dropped: Temporary buffer to remember last read packet dropped values.
+ *
+ * MIB counters needs to be read periodically so that counters do not get
+ * overflowed and give incorrect values. A right balance is needed to
+ * satisfy this condition and not waste too much CPU time.
+ *
+ * It is pointless to read MIB counters when the port is disconnected. The
+ * @state provides the connection status so that MIB counters are read only
+ * when the port is connected. The @link_down indicates the port is just
+ * disconnected so that all MIB counters are read one last time to update the
+ * information.
+ */
+struct ksz_port_mib {
+ u8 cnt_ptr;
+ u8 link_down;
+ u8 state;
+ u8 mib_start;
+
+ u64 counter[TOTAL_PORT_COUNTER_NUM];
+ u32 dropped[2];
+};
+
+/**
+ * struct ksz_port_cfg - Port configuration data structure
+ * @vid: VID value.
+ * @member: Port membership.
+ * @port_prio: Port priority.
+ * @rx_rate: Receive priority rate.
+ * @tx_rate: Transmit priority rate.
+ * @stp_state: Current Spanning Tree Protocol state.
+ */
+struct ksz_port_cfg {
+ u16 vid;
+ u8 member;
+ u8 port_prio;
+ u32 rx_rate[PRIO_QUEUES];
+ u32 tx_rate[PRIO_QUEUES];
+ int stp_state;
+};
+
+/**
+ * struct ksz_switch - KSZ8842 switch data structure
+ * @mac_table: MAC table entries information.
+ * @vlan_table: VLAN table entries information.
+ * @port_cfg: Port configuration information.
+ * @diffserv: DiffServ priority settings. Possible values from 6-bit of ToS
+ * (bit7 ~ bit2) field.
+ * @p_802_1p: 802.1P priority settings. Possible values from 3-bit of 802.1p
+ * Tag priority field.
+ * @br_addr: Bridge address. Used for STP.
+ * @other_addr: Other MAC address. Used for multiple network device mode.
+ * @broad_per: Broadcast storm percentage.
+ * @member: Current port membership. Used for STP.
+ */
+struct ksz_switch {
+ struct ksz_mac_table mac_table[STATIC_MAC_TABLE_ENTRIES];
+ struct ksz_vlan_table vlan_table[VLAN_TABLE_ENTRIES];
+ struct ksz_port_cfg port_cfg[TOTAL_PORT_NUM];
+
+ u8 diffserv[DIFFSERV_ENTRIES];
+ u8 p_802_1p[PRIO_802_1P_ENTRIES];
+
+ u8 br_addr[ETH_ALEN];
+ u8 other_addr[ETH_ALEN];
+
+ u8 broad_per;
+ u8 member;
+};
+
+#define TX_RATE_UNIT 10000
+
+/**
+ * struct ksz_port_info - Port information data structure
+ * @state: Connection status of the port.
+ * @tx_rate: Transmit rate divided by 10000 to get Mbit.
+ * @duplex: Duplex mode.
+ * @advertised: Advertised auto-negotiation setting. Used to determine link.
+ * @partner: Auto-negotiation partner setting. Used to determine link.
+ * @port_id: Port index to access actual hardware register.
+ * @pdev: Pointer to OS dependent network device.
+ */
+struct ksz_port_info {
+ uint state;
+ uint tx_rate;
+ u8 duplex;
+ u8 advertised;
+ u8 partner;
+ u8 port_id;
+ void *pdev;
+};
+
+#define MAX_TX_HELD_SIZE 52000
+
+/* Hardware features and bug fixes. */
+#define LINK_INT_WORKING (1 << 0)
+#define SMALL_PACKET_TX_BUG (1 << 1)
+#define HALF_DUPLEX_SIGNAL_BUG (1 << 2)
+#define RX_HUGE_FRAME (1 << 4)
+#define STP_SUPPORT (1 << 8)
+
+/* Software overrides. */
+#define PAUSE_FLOW_CTRL (1 << 0)
+#define FAST_AGING (1 << 1)
+
+/**
+ * struct ksz_hw - KSZ884X hardware data structure
+ * @io: Virtual address assigned.
+ * @ksz_switch: Pointer to KSZ8842 switch.
+ * @port_info: Port information.
+ * @port_mib: Port MIB information.
+ * @dev_count: Number of network devices this hardware supports.
+ * @dst_ports: Destination ports in switch for transmission.
+ * @id: Hardware ID. Used for display only.
+ * @mib_cnt: Number of MIB counters this hardware has.
+ * @mib_port_cnt: Number of ports with MIB counters.
+ * @tx_cfg: Cached transmit control settings.
+ * @rx_cfg: Cached receive control settings.
+ * @intr_mask: Current interrupt mask.
+ * @intr_set: Current interrup set.
+ * @intr_blocked: Interrupt blocked.
+ * @rx_desc_info: Receive descriptor information.
+ * @tx_desc_info: Transmit descriptor information.
+ * @tx_int_cnt: Transmit interrupt count. Used for TX optimization.
+ * @tx_int_mask: Transmit interrupt mask. Used for TX optimization.
+ * @tx_size: Transmit data size. Used for TX optimization.
+ * The maximum is defined by MAX_TX_HELD_SIZE.
+ * @perm_addr: Permanent MAC address.
+ * @override_addr: Overrided MAC address.
+ * @address: Additional MAC address entries.
+ * @addr_list_size: Additional MAC address list size.
+ * @mac_override: Indication of MAC address overrided.
+ * @promiscuous: Counter to keep track of promiscuous mode set.
+ * @all_multi: Counter to keep track of all multicast mode set.
+ * @multi_list: Multicast address entries.
+ * @multi_bits: Cached multicast hash table settings.
+ * @multi_list_size: Multicast address list size.
+ * @enabled: Indication of hardware enabled.
+ * @rx_stop: Indication of receive process stop.
+ * @features: Hardware features to enable.
+ * @overrides: Hardware features to override.
+ * @parent: Pointer to parent, network device private structure.
+ */
+struct ksz_hw {
+ void __iomem *io;
+
+ struct ksz_switch *ksz_switch;
+ struct ksz_port_info port_info[SWITCH_PORT_NUM];
+ struct ksz_port_mib port_mib[TOTAL_PORT_NUM];
+ int dev_count;
+ int dst_ports;
+ int id;
+ int mib_cnt;
+ int mib_port_cnt;
+
+ u32 tx_cfg;
+ u32 rx_cfg;
+ u32 intr_mask;
+ u32 intr_set;
+ uint intr_blocked;
+
+ struct ksz_desc_info rx_desc_info;
+ struct ksz_desc_info tx_desc_info;
+
+ int tx_int_cnt;
+ int tx_int_mask;
+ int tx_size;
+
+ u8 perm_addr[ETH_ALEN];
+ u8 override_addr[ETH_ALEN];
+ u8 address[ADDITIONAL_ENTRIES][ETH_ALEN];
+ u8 addr_list_size;
+ u8 mac_override;
+ u8 promiscuous;
+ u8 all_multi;
+ u8 multi_list[MAX_MULTICAST_LIST][ETH_ALEN];
+ u8 multi_bits[HW_MULTICAST_SIZE];
+ u8 multi_list_size;
+
+ u8 enabled;
+ u8 rx_stop;
+ u8 reserved2[1];
+
+ uint features;
+ uint overrides;
+
+ void *parent;
+};
+
+enum {
+ PHY_NO_FLOW_CTRL,
+ PHY_FLOW_CTRL,
+ PHY_TX_ONLY,
+ PHY_RX_ONLY
+};
+
+/**
+ * struct ksz_port - Virtual port data structure
+ * @duplex: Duplex mode setting. 1 for half duplex, 2 for full
+ * duplex, and 0 for auto, which normally results in full
+ * duplex.
+ * @speed: Speed setting. 10 for 10 Mbit, 100 for 100 Mbit, and
+ * 0 for auto, which normally results in 100 Mbit.
+ * @force_link: Force link setting. 0 for auto-negotiation, and 1 for
+ * force.
+ * @flow_ctrl: Flow control setting. PHY_NO_FLOW_CTRL for no flow
+ * control, and PHY_FLOW_CTRL for flow control.
+ * PHY_TX_ONLY and PHY_RX_ONLY are not supported for 100
+ * Mbit PHY.
+ * @first_port: Index of first port this port supports.
+ * @mib_port_cnt: Number of ports with MIB counters.
+ * @port_cnt: Number of ports this port supports.
+ * @counter: Port statistics counter.
+ * @hw: Pointer to hardware structure.
+ * @linked: Pointer to port information linked to this port.
+ */
+struct ksz_port {
+ u8 duplex;
+ u8 speed;
+ u8 force_link;
+ u8 flow_ctrl;
+
+ int first_port;
+ int mib_port_cnt;
+ int port_cnt;
+ u64 counter[OID_COUNTER_LAST];
+
+ struct ksz_hw *hw;
+ struct ksz_port_info *linked;
+};
+
+/**
+ * struct ksz_timer_info - Timer information data structure
+ * @timer: Kernel timer.
+ * @cnt: Running timer counter.
+ * @max: Number of times to run timer; -1 for infinity.
+ * @period: Timer period in jiffies.
+ */
+struct ksz_timer_info {
+ struct timer_list timer;
+ int cnt;
+ int max;
+ int period;
+};
+
+/**
+ * struct ksz_shared_mem - OS dependent shared memory data structure
+ * @dma_addr: Physical DMA address allocated.
+ * @alloc_size: Allocation size.
+ * @phys: Actual physical address used.
+ * @alloc_virt: Virtual address allocated.
+ * @virt: Actual virtual address used.
+ */
+struct ksz_shared_mem {
+ dma_addr_t dma_addr;
+ uint alloc_size;
+ uint phys;
+ u8 *alloc_virt;
+ u8 *virt;
+};
+
+/**
+ * struct ksz_counter_info - OS dependent counter information data structure
+ * @counter: Wait queue to wakeup after counters are read.
+ * @time: Next time in jiffies to read counter.
+ * @read: Indication of counters read in full or not.
+ */
+struct ksz_counter_info {
+ wait_queue_head_t counter;
+ unsigned long time;
+ int read;
+};
+
+/**
+ * struct dev_info - Network device information data structure
+ * @dev: Pointer to network device.
+ * @pdev: Pointer to PCI device.
+ * @hw: Hardware structure.
+ * @desc_pool: Physical memory used for descriptor pool.
+ * @hwlock: Spinlock to prevent hardware from accessing.
+ * @lock: Mutex lock to prevent device from accessing.
+ * @dev_rcv: Receive process function used.
+ * @last_skb: Socket buffer allocated for descriptor rx fragments.
+ * @skb_index: Buffer index for receiving fragments.
+ * @skb_len: Buffer length for receiving fragments.
+ * @mib_read: Workqueue to read MIB counters.
+ * @mib_timer_info: Timer to read MIB counters.
+ * @counter: Used for MIB reading.
+ * @mtu: Current MTU used. The default is REGULAR_RX_BUF_SIZE;
+ * the maximum is MAX_RX_BUF_SIZE.
+ * @opened: Counter to keep track of device open.
+ * @rx_tasklet: Receive processing tasklet.
+ * @tx_tasklet: Transmit processing tasklet.
+ * @wol_enable: Wake-on-LAN enable set by ethtool.
+ * @wol_support: Wake-on-LAN support used by ethtool.
+ * @pme_wait: Used for KSZ8841 power management.
+ */
+struct dev_info {
+ struct net_device *dev;
+ struct pci_dev *pdev;
+
+ struct ksz_hw hw;
+ struct ksz_shared_mem desc_pool;
+
+ spinlock_t hwlock;
+ struct mutex lock;
+
+ int (*dev_rcv)(struct dev_info *);
+
+ struct sk_buff *last_skb;
+ int skb_index;
+ int skb_len;
+
+ struct work_struct mib_read;
+ struct ksz_timer_info mib_timer_info;
+ struct ksz_counter_info counter[TOTAL_PORT_NUM];
+
+ int mtu;
+ int opened;
+
+ struct tasklet_struct rx_tasklet;
+ struct tasklet_struct tx_tasklet;
+
+ int wol_enable;
+ int wol_support;
+ unsigned long pme_wait;
+};
+
+/**
+ * struct dev_priv - Network device private data structure
+ * @adapter: Adapter device information.
+ * @port: Port information.
+ * @monitor_time_info: Timer to monitor ports.
+ * @proc_sem: Semaphore for proc accessing.
+ * @id: Device ID.
+ * @mii_if: MII interface information.
+ * @advertising: Temporary variable to store advertised settings.
+ * @msg_enable: The message flags controlling driver output.
+ * @media_state: The connection status of the device.
+ * @multicast: The all multicast state of the device.
+ * @promiscuous: The promiscuous state of the device.
+ */
+struct dev_priv {
+ struct dev_info *adapter;
+ struct ksz_port port;
+ struct ksz_timer_info monitor_timer_info;
+
+ struct semaphore proc_sem;
+ int id;
+
+ struct mii_if_info mii_if;
+ u32 advertising;
+
+ u32 msg_enable;
+ int media_state;
+ int multicast;
+ int promiscuous;
+};
+
+#define DRV_NAME "KSZ884X PCI"
+#define DEVICE_NAME "KSZ884x PCI"
+#define DRV_VERSION "1.0.0"
+#define DRV_RELDATE "Feb 8, 2010"
+
+static char version[] =
+ "Micrel " DEVICE_NAME " " DRV_VERSION " (" DRV_RELDATE ")";
+
+static u8 DEFAULT_MAC_ADDRESS[] = { 0x00, 0x10, 0xA1, 0x88, 0x42, 0x01 };
+
+/*
+ * Interrupt processing primary routines
+ */
+
+static inline void hw_ack_intr(struct ksz_hw *hw, uint interrupt)
+{
+ writel(interrupt, hw->io + KS884X_INTERRUPTS_STATUS);
+}
+
+static inline void hw_dis_intr(struct ksz_hw *hw)
+{
+ hw->intr_blocked = hw->intr_mask;
+ writel(0, hw->io + KS884X_INTERRUPTS_ENABLE);
+ hw->intr_set = readl(hw->io + KS884X_INTERRUPTS_ENABLE);
+}
+
+static inline void hw_set_intr(struct ksz_hw *hw, uint interrupt)
+{
+ hw->intr_set = interrupt;
+ writel(interrupt, hw->io + KS884X_INTERRUPTS_ENABLE);
+}
+
+static inline void hw_ena_intr(struct ksz_hw *hw)
+{
+ hw->intr_blocked = 0;
+ hw_set_intr(hw, hw->intr_mask);
+}
+
+static inline void hw_dis_intr_bit(struct ksz_hw *hw, uint bit)
+{
+ hw->intr_mask &= ~(bit);
+}
+
+static inline void hw_turn_off_intr(struct ksz_hw *hw, uint interrupt)
+{
+ u32 read_intr;
+
+ read_intr = readl(hw->io + KS884X_INTERRUPTS_ENABLE);
+ hw->intr_set = read_intr & ~interrupt;
+ writel(hw->intr_set, hw->io + KS884X_INTERRUPTS_ENABLE);
+ hw_dis_intr_bit(hw, interrupt);
+}
+
+/**
+ * hw_turn_on_intr - turn on specified interrupts
+ * @hw: The hardware instance.
+ * @bit: The interrupt bits to be on.
+ *
+ * This routine turns on the specified interrupts in the interrupt mask so that
+ * those interrupts will be enabled.
+ */
+static void hw_turn_on_intr(struct ksz_hw *hw, u32 bit)
+{
+ hw->intr_mask |= bit;
+
+ if (!hw->intr_blocked)
+ hw_set_intr(hw, hw->intr_mask);
+}
+
+static inline void hw_ena_intr_bit(struct ksz_hw *hw, uint interrupt)
+{
+ u32 read_intr;
+
+ read_intr = readl(hw->io + KS884X_INTERRUPTS_ENABLE);
+ hw->intr_set = read_intr | interrupt;
+ writel(hw->intr_set, hw->io + KS884X_INTERRUPTS_ENABLE);
+}
+
+static inline void hw_read_intr(struct ksz_hw *hw, uint *status)
+{
+ *status = readl(hw->io + KS884X_INTERRUPTS_STATUS);
+ *status = *status & hw->intr_set;
+}
+
+static inline void hw_restore_intr(struct ksz_hw *hw, uint interrupt)
+{
+ if (interrupt)
+ hw_ena_intr(hw);
+}
+
+/**
+ * hw_block_intr - block hardware interrupts
+ *
+ * This function blocks all interrupts of the hardware and returns the current
+ * interrupt enable mask so that interrupts can be restored later.
+ *
+ * Return the current interrupt enable mask.
+ */
+static uint hw_block_intr(struct ksz_hw *hw)
+{
+ uint interrupt = 0;
+
+ if (!hw->intr_blocked) {
+ hw_dis_intr(hw);
+ interrupt = hw->intr_blocked;
+ }
+ return interrupt;
+}
+
+/*
+ * Hardware descriptor routines
+ */
+
+static inline void reset_desc(struct ksz_desc *desc, union desc_stat status)
+{
+ status.rx.hw_owned = 0;
+ desc->phw->ctrl.data = cpu_to_le32(status.data);
+}
+
+static inline void release_desc(struct ksz_desc *desc)
+{
+ desc->sw.ctrl.tx.hw_owned = 1;
+ if (desc->sw.buf_size != desc->sw.buf.data) {
+ desc->sw.buf_size = desc->sw.buf.data;
+ desc->phw->buf.data = cpu_to_le32(desc->sw.buf.data);
+ }
+ desc->phw->ctrl.data = cpu_to_le32(desc->sw.ctrl.data);
+}
+
+static void get_rx_pkt(struct ksz_desc_info *info, struct ksz_desc **desc)
+{
+ *desc = &info->ring[info->last];
+ info->last++;
+ info->last &= info->mask;
+ info->avail--;
+ (*desc)->sw.buf.data &= ~KS_DESC_RX_MASK;
+}
+
+static inline void set_rx_buf(struct ksz_desc *desc, u32 addr)
+{
+ desc->phw->addr = cpu_to_le32(addr);
+}
+
+static inline void set_rx_len(struct ksz_desc *desc, u32 len)
+{
+ desc->sw.buf.rx.buf_size = len;
+}
+
+static inline void get_tx_pkt(struct ksz_desc_info *info,
+ struct ksz_desc **desc)
+{
+ *desc = &info->ring[info->next];
+ info->next++;
+ info->next &= info->mask;
+ info->avail--;
+ (*desc)->sw.buf.data &= ~KS_DESC_TX_MASK;
+}
+
+static inline void set_tx_buf(struct ksz_desc *desc, u32 addr)
+{
+ desc->phw->addr = cpu_to_le32(addr);
+}
+
+static inline void set_tx_len(struct ksz_desc *desc, u32 len)
+{
+ desc->sw.buf.tx.buf_size = len;
+}
+
+/* Switch functions */
+
+#define TABLE_READ 0x10
+#define TABLE_SEL_SHIFT 2
+
+#define HW_DELAY(hw, reg) \
+ do { \
+ u16 dummy; \
+ dummy = readw(hw->io + reg); \
+ } while (0)
+
+/**
+ * sw_r_table - read 4 bytes of data from switch table
+ * @hw: The hardware instance.
+ * @table: The table selector.
+ * @addr: The address of the table entry.
+ * @data: Buffer to store the read data.
+ *
+ * This routine reads 4 bytes of data from the table of the switch.
+ * Hardware interrupts are disabled to minimize corruption of read data.
+ */
+static void sw_r_table(struct ksz_hw *hw, int table, u16 addr, u32 *data)
+{
+ u16 ctrl_addr;
+ uint interrupt;
+
+ ctrl_addr = (((table << TABLE_SEL_SHIFT) | TABLE_READ) << 8) | addr;
+
+ interrupt = hw_block_intr(hw);
+
+ writew(ctrl_addr, hw->io + KS884X_IACR_OFFSET);
+ HW_DELAY(hw, KS884X_IACR_OFFSET);
+ *data = readl(hw->io + KS884X_ACC_DATA_0_OFFSET);
+
+ hw_restore_intr(hw, interrupt);
+}
+
+/**
+ * sw_w_table_64 - write 8 bytes of data to the switch table
+ * @hw: The hardware instance.
+ * @table: The table selector.
+ * @addr: The address of the table entry.
+ * @data_hi: The high part of data to be written (bit63 ~ bit32).
+ * @data_lo: The low part of data to be written (bit31 ~ bit0).
+ *
+ * This routine writes 8 bytes of data to the table of the switch.
+ * Hardware interrupts are disabled to minimize corruption of written data.
+ */
+static void sw_w_table_64(struct ksz_hw *hw, int table, u16 addr, u32 data_hi,
+ u32 data_lo)
+{
+ u16 ctrl_addr;
+ uint interrupt;
+
+ ctrl_addr = ((table << TABLE_SEL_SHIFT) << 8) | addr;
+
+ interrupt = hw_block_intr(hw);
+
+ writel(data_hi, hw->io + KS884X_ACC_DATA_4_OFFSET);
+ writel(data_lo, hw->io + KS884X_ACC_DATA_0_OFFSET);
+
+ writew(ctrl_addr, hw->io + KS884X_IACR_OFFSET);
+ HW_DELAY(hw, KS884X_IACR_OFFSET);
+
+ hw_restore_intr(hw, interrupt);
+}
+
+/**
+ * sw_w_sta_mac_table - write to the static MAC table
+ * @hw: The hardware instance.
+ * @addr: The address of the table entry.
+ * @mac_addr: The MAC address.
+ * @ports: The port members.
+ * @override: The flag to override the port receive/transmit settings.
+ * @valid: The flag to indicate entry is valid.
+ * @use_fid: The flag to indicate the FID is valid.
+ * @fid: The FID value.
+ *
+ * This routine writes an entry of the static MAC table of the switch. It
+ * calls sw_w_table_64() to write the data.
+ */
+static void sw_w_sta_mac_table(struct ksz_hw *hw, u16 addr, u8 *mac_addr,
+ u8 ports, int override, int valid, int use_fid, u8 fid)
+{
+ u32 data_hi;
+ u32 data_lo;
+
+ data_lo = ((u32) mac_addr[2] << 24) |
+ ((u32) mac_addr[3] << 16) |
+ ((u32) mac_addr[4] << 8) | mac_addr[5];
+ data_hi = ((u32) mac_addr[0] << 8) | mac_addr[1];
+ data_hi |= (u32) ports << STATIC_MAC_FWD_PORTS_SHIFT;
+
+ if (override)
+ data_hi |= STATIC_MAC_TABLE_OVERRIDE;
+ if (use_fid) {
+ data_hi |= STATIC_MAC_TABLE_USE_FID;
+ data_hi |= (u32) fid << STATIC_MAC_FID_SHIFT;
+ }
+ if (valid)
+ data_hi |= STATIC_MAC_TABLE_VALID;
+
+ sw_w_table_64(hw, TABLE_STATIC_MAC, addr, data_hi, data_lo);
+}
+
+/**
+ * sw_r_vlan_table - read from the VLAN table
+ * @hw: The hardware instance.
+ * @addr: The address of the table entry.
+ * @vid: Buffer to store the VID.
+ * @fid: Buffer to store the VID.
+ * @member: Buffer to store the port membership.
+ *
+ * This function reads an entry of the VLAN table of the switch. It calls
+ * sw_r_table() to get the data.
+ *
+ * Return 0 if the entry is valid; otherwise -1.
+ */
+static int sw_r_vlan_table(struct ksz_hw *hw, u16 addr, u16 *vid, u8 *fid,
+ u8 *member)
+{
+ u32 data;
+
+ sw_r_table(hw, TABLE_VLAN, addr, &data);
+ if (data & VLAN_TABLE_VALID) {
+ *vid = (u16)(data & VLAN_TABLE_VID);
+ *fid = (u8)((data & VLAN_TABLE_FID) >> VLAN_TABLE_FID_SHIFT);
+ *member = (u8)((data & VLAN_TABLE_MEMBERSHIP) >>
+ VLAN_TABLE_MEMBERSHIP_SHIFT);
+ return 0;
+ }
+ return -1;
+}
+
+/**
+ * port_r_mib_cnt - read MIB counter
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @addr: The address of the counter.
+ * @cnt: Buffer to store the counter.
+ *
+ * This routine reads a MIB counter of the port.
+ * Hardware interrupts are disabled to minimize corruption of read data.
+ */
+static void port_r_mib_cnt(struct ksz_hw *hw, int port, u16 addr, u64 *cnt)
+{
+ u32 data;
+ u16 ctrl_addr;
+ uint interrupt;
+ int timeout;
+
+ ctrl_addr = addr + PORT_COUNTER_NUM * port;
+
+ interrupt = hw_block_intr(hw);
+
+ ctrl_addr |= (((TABLE_MIB << TABLE_SEL_SHIFT) | TABLE_READ) << 8);
+ writew(ctrl_addr, hw->io + KS884X_IACR_OFFSET);
+ HW_DELAY(hw, KS884X_IACR_OFFSET);
+
+ for (timeout = 100; timeout > 0; timeout--) {
+ data = readl(hw->io + KS884X_ACC_DATA_0_OFFSET);
+
+ if (data & MIB_COUNTER_VALID) {
+ if (data & MIB_COUNTER_OVERFLOW)
+ *cnt += MIB_COUNTER_VALUE + 1;
+ *cnt += data & MIB_COUNTER_VALUE;
+ break;
+ }
+ }
+
+ hw_restore_intr(hw, interrupt);
+}
+
+/**
+ * port_r_mib_pkt - read dropped packet counts
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @cnt: Buffer to store the receive and transmit dropped packet counts.
+ *
+ * This routine reads the dropped packet counts of the port.
+ * Hardware interrupts are disabled to minimize corruption of read data.
+ */
+static void port_r_mib_pkt(struct ksz_hw *hw, int port, u32 *last, u64 *cnt)
+{
+ u32 cur;
+ u32 data;
+ u16 ctrl_addr;
+ uint interrupt;
+ int index;
+
+ index = KS_MIB_PACKET_DROPPED_RX_0 + port;
+ do {
+ interrupt = hw_block_intr(hw);
+
+ ctrl_addr = (u16) index;
+ ctrl_addr |= (((TABLE_MIB << TABLE_SEL_SHIFT) | TABLE_READ)
+ << 8);
+ writew(ctrl_addr, hw->io + KS884X_IACR_OFFSET);
+ HW_DELAY(hw, KS884X_IACR_OFFSET);
+ data = readl(hw->io + KS884X_ACC_DATA_0_OFFSET);
+
+ hw_restore_intr(hw, interrupt);
+
+ data &= MIB_PACKET_DROPPED;
+ cur = *last;
+ if (data != cur) {
+ *last = data;
+ if (data < cur)
+ data += MIB_PACKET_DROPPED + 1;
+ data -= cur;
+ *cnt += data;
+ }
+ ++last;
+ ++cnt;
+ index -= KS_MIB_PACKET_DROPPED_TX -
+ KS_MIB_PACKET_DROPPED_TX_0 + 1;
+ } while (index >= KS_MIB_PACKET_DROPPED_TX_0 + port);
+}
+
+/**
+ * port_r_cnt - read MIB counters periodically
+ * @hw: The hardware instance.
+ * @port: The port index.
+ *
+ * This routine is used to read the counters of the port periodically to avoid
+ * counter overflow. The hardware should be acquired first before calling this
+ * routine.
+ *
+ * Return non-zero when not all counters not read.
+ */
+static int port_r_cnt(struct ksz_hw *hw, int port)
+{
+ struct ksz_port_mib *mib = &hw->port_mib[port];
+
+ if (mib->mib_start < PORT_COUNTER_NUM)
+ while (mib->cnt_ptr < PORT_COUNTER_NUM) {
+ port_r_mib_cnt(hw, port, mib->cnt_ptr,
+ &mib->counter[mib->cnt_ptr]);
+ ++mib->cnt_ptr;
+ }
+ if (hw->mib_cnt > PORT_COUNTER_NUM)
+ port_r_mib_pkt(hw, port, mib->dropped,
+ &mib->counter[PORT_COUNTER_NUM]);
+ mib->cnt_ptr = 0;
+ return 0;
+}
+
+/**
+ * port_init_cnt - initialize MIB counter values
+ * @hw: The hardware instance.
+ * @port: The port index.
+ *
+ * This routine is used to initialize all counters to zero if the hardware
+ * cannot do it after reset.
+ */
+static void port_init_cnt(struct ksz_hw *hw, int port)
+{
+ struct ksz_port_mib *mib = &hw->port_mib[port];
+
+ mib->cnt_ptr = 0;
+ if (mib->mib_start < PORT_COUNTER_NUM)
+ do {
+ port_r_mib_cnt(hw, port, mib->cnt_ptr,
+ &mib->counter[mib->cnt_ptr]);
+ ++mib->cnt_ptr;
+ } while (mib->cnt_ptr < PORT_COUNTER_NUM);
+ if (hw->mib_cnt > PORT_COUNTER_NUM)
+ port_r_mib_pkt(hw, port, mib->dropped,
+ &mib->counter[PORT_COUNTER_NUM]);
+ memset((void *) mib->counter, 0, sizeof(u64) * TOTAL_PORT_COUNTER_NUM);
+ mib->cnt_ptr = 0;
+}
+
+/*
+ * Port functions
+ */
+
+/**
+ * port_chk - check port register bits
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @offset: The offset of the port register.
+ * @bits: The data bits to check.
+ *
+ * This function checks whether the specified bits of the port register are set
+ * or not.
+ *
+ * Return 0 if the bits are not set.
+ */
+static int port_chk(struct ksz_hw *hw, int port, int offset, u16 bits)
+{
+ u32 addr;
+ u16 data;
+
+ PORT_CTRL_ADDR(port, addr);
+ addr += offset;
+ data = readw(hw->io + addr);
+ return (data & bits) == bits;
+}
+
+/**
+ * port_cfg - set port register bits
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @offset: The offset of the port register.
+ * @bits: The data bits to set.
+ * @set: The flag indicating whether the bits are to be set or not.
+ *
+ * This routine sets or resets the specified bits of the port register.
+ */
+static void port_cfg(struct ksz_hw *hw, int port, int offset, u16 bits,
+ int set)
+{
+ u32 addr;
+ u16 data;
+
+ PORT_CTRL_ADDR(port, addr);
+ addr += offset;
+ data = readw(hw->io + addr);
+ if (set)
+ data |= bits;
+ else
+ data &= ~bits;
+ writew(data, hw->io + addr);
+}
+
+/**
+ * port_chk_shift - check port bit
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @offset: The offset of the register.
+ * @shift: Number of bits to shift.
+ *
+ * This function checks whether the specified port is set in the register or
+ * not.
+ *
+ * Return 0 if the port is not set.
+ */
+static int port_chk_shift(struct ksz_hw *hw, int port, u32 addr, int shift)
+{
+ u16 data;
+ u16 bit = 1 << port;
+
+ data = readw(hw->io + addr);
+ data >>= shift;
+ return (data & bit) == bit;
+}
+
+/**
+ * port_cfg_shift - set port bit
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @offset: The offset of the register.
+ * @shift: Number of bits to shift.
+ * @set: The flag indicating whether the port is to be set or not.
+ *
+ * This routine sets or resets the specified port in the register.
+ */
+static void port_cfg_shift(struct ksz_hw *hw, int port, u32 addr, int shift,
+ int set)
+{
+ u16 data;
+ u16 bits = 1 << port;
+
+ data = readw(hw->io + addr);
+ bits <<= shift;
+ if (set)
+ data |= bits;
+ else
+ data &= ~bits;
+ writew(data, hw->io + addr);
+}
+
+/**
+ * port_r8 - read byte from port register
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @offset: The offset of the port register.
+ * @data: Buffer to store the data.
+ *
+ * This routine reads a byte from the port register.
+ */
+static void port_r8(struct ksz_hw *hw, int port, int offset, u8 *data)
+{
+ u32 addr;
+
+ PORT_CTRL_ADDR(port, addr);
+ addr += offset;
+ *data = readb(hw->io + addr);
+}
+
+/**
+ * port_r16 - read word from port register.
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @offset: The offset of the port register.
+ * @data: Buffer to store the data.
+ *
+ * This routine reads a word from the port register.
+ */
+static void port_r16(struct ksz_hw *hw, int port, int offset, u16 *data)
+{
+ u32 addr;
+
+ PORT_CTRL_ADDR(port, addr);
+ addr += offset;
+ *data = readw(hw->io + addr);
+}
+
+/**
+ * port_w16 - write word to port register.
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @offset: The offset of the port register.
+ * @data: Data to write.
+ *
+ * This routine writes a word to the port register.
+ */
+static void port_w16(struct ksz_hw *hw, int port, int offset, u16 data)
+{
+ u32 addr;
+
+ PORT_CTRL_ADDR(port, addr);
+ addr += offset;
+ writew(data, hw->io + addr);
+}
+
+/**
+ * sw_chk - check switch register bits
+ * @hw: The hardware instance.
+ * @addr: The address of the switch register.
+ * @bits: The data bits to check.
+ *
+ * This function checks whether the specified bits of the switch register are
+ * set or not.
+ *
+ * Return 0 if the bits are not set.
+ */
+static int sw_chk(struct ksz_hw *hw, u32 addr, u16 bits)
+{
+ u16 data;
+
+ data = readw(hw->io + addr);
+ return (data & bits) == bits;
+}
+
+/**
+ * sw_cfg - set switch register bits
+ * @hw: The hardware instance.
+ * @addr: The address of the switch register.
+ * @bits: The data bits to set.
+ * @set: The flag indicating whether the bits are to be set or not.
+ *
+ * This function sets or resets the specified bits of the switch register.
+ */
+static void sw_cfg(struct ksz_hw *hw, u32 addr, u16 bits, int set)
+{
+ u16 data;
+
+ data = readw(hw->io + addr);
+ if (set)
+ data |= bits;
+ else
+ data &= ~bits;
+ writew(data, hw->io + addr);
+}
+
+/* Bandwidth */
+
+static inline void port_cfg_broad_storm(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_BROADCAST_STORM, set);
+}
+
+static inline int port_chk_broad_storm(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_BROADCAST_STORM);
+}
+
+/* Driver set switch broadcast storm protection at 10% rate. */
+#define BROADCAST_STORM_PROTECTION_RATE 10
+
+/* 148,800 frames * 67 ms / 100 */
+#define BROADCAST_STORM_VALUE 9969
+
+/**
+ * sw_cfg_broad_storm - configure broadcast storm threshold
+ * @hw: The hardware instance.
+ * @percent: Broadcast storm threshold in percent of transmit rate.
+ *
+ * This routine configures the broadcast storm threshold of the switch.
+ */
+static void sw_cfg_broad_storm(struct ksz_hw *hw, u8 percent)
+{
+ u16 data;
+ u32 value = ((u32) BROADCAST_STORM_VALUE * (u32) percent / 100);
+
+ if (value > BROADCAST_STORM_RATE)
+ value = BROADCAST_STORM_RATE;
+
+ data = readw(hw->io + KS8842_SWITCH_CTRL_3_OFFSET);
+ data &= ~(BROADCAST_STORM_RATE_LO | BROADCAST_STORM_RATE_HI);
+ data |= ((value & 0x00FF) << 8) | ((value & 0xFF00) >> 8);
+ writew(data, hw->io + KS8842_SWITCH_CTRL_3_OFFSET);
+}
+
+/**
+ * sw_get_board_storm - get broadcast storm threshold
+ * @hw: The hardware instance.
+ * @percent: Buffer to store the broadcast storm threshold percentage.
+ *
+ * This routine retrieves the broadcast storm threshold of the switch.
+ */
+static void sw_get_broad_storm(struct ksz_hw *hw, u8 *percent)
+{
+ int num;
+ u16 data;
+
+ data = readw(hw->io + KS8842_SWITCH_CTRL_3_OFFSET);
+ num = (data & BROADCAST_STORM_RATE_HI);
+ num <<= 8;
+ num |= (data & BROADCAST_STORM_RATE_LO) >> 8;
+ num = (num * 100 + BROADCAST_STORM_VALUE / 2) / BROADCAST_STORM_VALUE;
+ *percent = (u8) num;
+}
+
+/**
+ * sw_dis_broad_storm - disable broadstorm
+ * @hw: The hardware instance.
+ * @port: The port index.
+ *
+ * This routine disables the broadcast storm limit function of the switch.
+ */
+static void sw_dis_broad_storm(struct ksz_hw *hw, int port)
+{
+ port_cfg_broad_storm(hw, port, 0);
+}
+
+/**
+ * sw_ena_broad_storm - enable broadcast storm
+ * @hw: The hardware instance.
+ * @port: The port index.
+ *
+ * This routine enables the broadcast storm limit function of the switch.
+ */
+static void sw_ena_broad_storm(struct ksz_hw *hw, int port)
+{
+ sw_cfg_broad_storm(hw, hw->ksz_switch->broad_per);
+ port_cfg_broad_storm(hw, port, 1);
+}
+
+/**
+ * sw_init_broad_storm - initialize broadcast storm
+ * @hw: The hardware instance.
+ *
+ * This routine initializes the broadcast storm limit function of the switch.
+ */
+static void sw_init_broad_storm(struct ksz_hw *hw)
+{
+ int port;
+
+ hw->ksz_switch->broad_per = 1;
+ sw_cfg_broad_storm(hw, hw->ksz_switch->broad_per);
+ for (port = 0; port < TOTAL_PORT_NUM; port++)
+ sw_dis_broad_storm(hw, port);
+ sw_cfg(hw, KS8842_SWITCH_CTRL_2_OFFSET, MULTICAST_STORM_DISABLE, 1);
+}
+
+/**
+ * hw_cfg_broad_storm - configure broadcast storm
+ * @hw: The hardware instance.
+ * @percent: Broadcast storm threshold in percent of transmit rate.
+ *
+ * This routine configures the broadcast storm threshold of the switch.
+ * It is called by user functions. The hardware should be acquired first.
+ */
+static void hw_cfg_broad_storm(struct ksz_hw *hw, u8 percent)
+{
+ if (percent > 100)
+ percent = 100;
+
+ sw_cfg_broad_storm(hw, percent);
+ sw_get_broad_storm(hw, &percent);
+ hw->ksz_switch->broad_per = percent;
+}
+
+/**
+ * sw_dis_prio_rate - disable switch priority rate
+ * @hw: The hardware instance.
+ * @port: The port index.
+ *
+ * This routine disables the priority rate function of the switch.
+ */
+static void sw_dis_prio_rate(struct ksz_hw *hw, int port)
+{
+ u32 addr;
+
+ PORT_CTRL_ADDR(port, addr);
+ addr += KS8842_PORT_IN_RATE_OFFSET;
+ writel(0, hw->io + addr);
+}
+
+/**
+ * sw_init_prio_rate - initialize switch prioirty rate
+ * @hw: The hardware instance.
+ *
+ * This routine initializes the priority rate function of the switch.
+ */
+static void sw_init_prio_rate(struct ksz_hw *hw)
+{
+ int port;
+ int prio;
+ struct ksz_switch *sw = hw->ksz_switch;
+
+ for (port = 0; port < TOTAL_PORT_NUM; port++) {
+ for (prio = 0; prio < PRIO_QUEUES; prio++) {
+ sw->port_cfg[port].rx_rate[prio] =
+ sw->port_cfg[port].tx_rate[prio] = 0;
+ }
+ sw_dis_prio_rate(hw, port);
+ }
+}
+
+/* Communication */
+
+static inline void port_cfg_back_pressure(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_BACK_PRESSURE, set);
+}
+
+static inline void port_cfg_force_flow_ctrl(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_FORCE_FLOW_CTRL, set);
+}
+
+static inline int port_chk_back_pressure(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_BACK_PRESSURE);
+}
+
+static inline int port_chk_force_flow_ctrl(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_FORCE_FLOW_CTRL);
+}
+
+/* Spanning Tree */
+
+static inline void port_cfg_rx(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_RX_ENABLE, set);
+}
+
+static inline void port_cfg_tx(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_TX_ENABLE, set);
+}
+
+static inline void sw_cfg_fast_aging(struct ksz_hw *hw, int set)
+{
+ sw_cfg(hw, KS8842_SWITCH_CTRL_1_OFFSET, SWITCH_FAST_AGING, set);
+}
+
+static inline void sw_flush_dyn_mac_table(struct ksz_hw *hw)
+{
+ if (!(hw->overrides & FAST_AGING)) {
+ sw_cfg_fast_aging(hw, 1);
+ mdelay(1);
+ sw_cfg_fast_aging(hw, 0);
+ }
+}
+
+/* VLAN */
+
+static inline void port_cfg_ins_tag(struct ksz_hw *hw, int p, int insert)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_INSERT_TAG, insert);
+}
+
+static inline void port_cfg_rmv_tag(struct ksz_hw *hw, int p, int remove)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_REMOVE_TAG, remove);
+}
+
+static inline int port_chk_ins_tag(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_INSERT_TAG);
+}
+
+static inline int port_chk_rmv_tag(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_REMOVE_TAG);
+}
+
+static inline void port_cfg_dis_non_vid(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_DISCARD_NON_VID, set);
+}
+
+static inline void port_cfg_in_filter(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_INGRESS_VLAN_FILTER, set);
+}
+
+static inline int port_chk_dis_non_vid(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_DISCARD_NON_VID);
+}
+
+static inline int port_chk_in_filter(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_INGRESS_VLAN_FILTER);
+}
+
+/* Mirroring */
+
+static inline void port_cfg_mirror_sniffer(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_MIRROR_SNIFFER, set);
+}
+
+static inline void port_cfg_mirror_rx(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_MIRROR_RX, set);
+}
+
+static inline void port_cfg_mirror_tx(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_MIRROR_TX, set);
+}
+
+static inline void sw_cfg_mirror_rx_tx(struct ksz_hw *hw, int set)
+{
+ sw_cfg(hw, KS8842_SWITCH_CTRL_2_OFFSET, SWITCH_MIRROR_RX_TX, set);
+}
+
+static void sw_init_mirror(struct ksz_hw *hw)
+{
+ int port;
+
+ for (port = 0; port < TOTAL_PORT_NUM; port++) {
+ port_cfg_mirror_sniffer(hw, port, 0);
+ port_cfg_mirror_rx(hw, port, 0);
+ port_cfg_mirror_tx(hw, port, 0);
+ }
+ sw_cfg_mirror_rx_tx(hw, 0);
+}
+
+static inline void sw_cfg_unk_def_deliver(struct ksz_hw *hw, int set)
+{
+ sw_cfg(hw, KS8842_SWITCH_CTRL_7_OFFSET,
+ SWITCH_UNK_DEF_PORT_ENABLE, set);
+}
+
+static inline int sw_cfg_chk_unk_def_deliver(struct ksz_hw *hw)
+{
+ return sw_chk(hw, KS8842_SWITCH_CTRL_7_OFFSET,
+ SWITCH_UNK_DEF_PORT_ENABLE);
+}
+
+static inline void sw_cfg_unk_def_port(struct ksz_hw *hw, int port, int set)
+{
+ port_cfg_shift(hw, port, KS8842_SWITCH_CTRL_7_OFFSET, 0, set);
+}
+
+static inline int sw_chk_unk_def_port(struct ksz_hw *hw, int port)
+{
+ return port_chk_shift(hw, port, KS8842_SWITCH_CTRL_7_OFFSET, 0);
+}
+
+/* Priority */
+
+static inline void port_cfg_diffserv(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_DIFFSERV_ENABLE, set);
+}
+
+static inline void port_cfg_802_1p(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_802_1P_ENABLE, set);
+}
+
+static inline void port_cfg_replace_vid(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_USER_PRIORITY_CEILING, set);
+}
+
+static inline void port_cfg_prio(struct ksz_hw *hw, int p, int set)
+{
+ port_cfg(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_PRIO_QUEUE_ENABLE, set);
+}
+
+static inline int port_chk_diffserv(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_DIFFSERV_ENABLE);
+}
+
+static inline int port_chk_802_1p(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_802_1P_ENABLE);
+}
+
+static inline int port_chk_replace_vid(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_2_OFFSET, PORT_USER_PRIORITY_CEILING);
+}
+
+static inline int port_chk_prio(struct ksz_hw *hw, int p)
+{
+ return port_chk(hw, p,
+ KS8842_PORT_CTRL_1_OFFSET, PORT_PRIO_QUEUE_ENABLE);
+}
+
+/**
+ * sw_dis_diffserv - disable switch DiffServ priority
+ * @hw: The hardware instance.
+ * @port: The port index.
+ *
+ * This routine disables the DiffServ priority function of the switch.
+ */
+static void sw_dis_diffserv(struct ksz_hw *hw, int port)
+{
+ port_cfg_diffserv(hw, port, 0);
+}
+
+/**
+ * sw_dis_802_1p - disable switch 802.1p priority
+ * @hw: The hardware instance.
+ * @port: The port index.
+ *
+ * This routine disables the 802.1p priority function of the switch.
+ */
+static void sw_dis_802_1p(struct ksz_hw *hw, int port)
+{
+ port_cfg_802_1p(hw, port, 0);
+}
+
+/**
+ * sw_cfg_replace_null_vid -
+ * @hw: The hardware instance.
+ * @set: The flag to disable or enable.
+ *
+ */
+static void sw_cfg_replace_null_vid(struct ksz_hw *hw, int set)
+{
+ sw_cfg(hw, KS8842_SWITCH_CTRL_3_OFFSET, SWITCH_REPLACE_NULL_VID, set);
+}
+
+/**
+ * sw_cfg_replace_vid - enable switch 802.10 priority re-mapping
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @set: The flag to disable or enable.
+ *
+ * This routine enables the 802.1p priority re-mapping function of the switch.
+ * That allows 802.1p priority field to be replaced with the port's default
+ * tag's priority value if the ingress packet's 802.1p priority has a higher
+ * priority than port's default tag's priority.
+ */
+static void sw_cfg_replace_vid(struct ksz_hw *hw, int port, int set)
+{
+ port_cfg_replace_vid(hw, port, set);
+}
+
+/**
+ * sw_cfg_port_based - configure switch port based priority
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @prio: The priority to set.
+ *
+ * This routine configures the port based priority of the switch.
+ */
+static void sw_cfg_port_based(struct ksz_hw *hw, int port, u8 prio)
+{
+ u16 data;
+
+ if (prio > PORT_BASED_PRIORITY_BASE)
+ prio = PORT_BASED_PRIORITY_BASE;
+
+ hw->ksz_switch->port_cfg[port].port_prio = prio;
+
+ port_r16(hw, port, KS8842_PORT_CTRL_1_OFFSET, &data);
+ data &= ~PORT_BASED_PRIORITY_MASK;
+ data |= prio << PORT_BASED_PRIORITY_SHIFT;
+ port_w16(hw, port, KS8842_PORT_CTRL_1_OFFSET, data);
+}
+
+/**
+ * sw_dis_multi_queue - disable transmit multiple queues
+ * @hw: The hardware instance.
+ * @port: The port index.
+ *
+ * This routine disables the transmit multiple queues selection of the switch
+ * port. Only single transmit queue on the port.
+ */
+static void sw_dis_multi_queue(struct ksz_hw *hw, int port)
+{
+ port_cfg_prio(hw, port, 0);
+}
+
+/**
+ * sw_init_prio - initialize switch priority
+ * @hw: The hardware instance.
+ *
+ * This routine initializes the switch QoS priority functions.
+ */
+static void sw_init_prio(struct ksz_hw *hw)
+{
+ int port;
+ int tos;
+ struct ksz_switch *sw = hw->ksz_switch;
+
+ /*
+ * Init all the 802.1p tag priority value to be assigned to different
+ * priority queue.
+ */
+ sw->p_802_1p[0] = 0;
+ sw->p_802_1p[1] = 0;
+ sw->p_802_1p[2] = 1;
+ sw->p_802_1p[3] = 1;
+ sw->p_802_1p[4] = 2;
+ sw->p_802_1p[5] = 2;
+ sw->p_802_1p[6] = 3;
+ sw->p_802_1p[7] = 3;
+
+ /*
+ * Init all the DiffServ priority value to be assigned to priority
+ * queue 0.
+ */
+ for (tos = 0; tos < DIFFSERV_ENTRIES; tos++)
+ sw->diffserv[tos] = 0;
+
+ /* All QoS functions disabled. */
+ for (port = 0; port < TOTAL_PORT_NUM; port++) {
+ sw_dis_multi_queue(hw, port);
+ sw_dis_diffserv(hw, port);
+ sw_dis_802_1p(hw, port);
+ sw_cfg_replace_vid(hw, port, 0);
+
+ sw->port_cfg[port].port_prio = 0;
+ sw_cfg_port_based(hw, port, sw->port_cfg[port].port_prio);
+ }
+ sw_cfg_replace_null_vid(hw, 0);
+}
+
+/**
+ * port_get_def_vid - get port default VID.
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @vid: Buffer to store the VID.
+ *
+ * This routine retrieves the default VID of the port.
+ */
+static void port_get_def_vid(struct ksz_hw *hw, int port, u16 *vid)
+{
+ u32 addr;
+
+ PORT_CTRL_ADDR(port, addr);
+ addr += KS8842_PORT_CTRL_VID_OFFSET;
+ *vid = readw(hw->io + addr);
+}
+
+/**
+ * sw_init_vlan - initialize switch VLAN
+ * @hw: The hardware instance.
+ *
+ * This routine initializes the VLAN function of the switch.
+ */
+static void sw_init_vlan(struct ksz_hw *hw)
+{
+ int port;
+ int entry;
+ struct ksz_switch *sw = hw->ksz_switch;
+
+ /* Read 16 VLAN entries from device's VLAN table. */
+ for (entry = 0; entry < VLAN_TABLE_ENTRIES; entry++) {
+ sw_r_vlan_table(hw, entry,
+ &sw->vlan_table[entry].vid,
+ &sw->vlan_table[entry].fid,
+ &sw->vlan_table[entry].member);
+ }
+
+ for (port = 0; port < TOTAL_PORT_NUM; port++) {
+ port_get_def_vid(hw, port, &sw->port_cfg[port].vid);
+ sw->port_cfg[port].member = PORT_MASK;
+ }
+}
+
+/**
+ * sw_cfg_port_base_vlan - configure port-based VLAN membership
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @member: The port-based VLAN membership.
+ *
+ * This routine configures the port-based VLAN membership of the port.
+ */
+static void sw_cfg_port_base_vlan(struct ksz_hw *hw, int port, u8 member)
+{
+ u32 addr;
+ u8 data;
+
+ PORT_CTRL_ADDR(port, addr);
+ addr += KS8842_PORT_CTRL_2_OFFSET;
+
+ data = readb(hw->io + addr);
+ data &= ~PORT_VLAN_MEMBERSHIP;
+ data |= (member & PORT_MASK);
+ writeb(data, hw->io + addr);
+
+ hw->ksz_switch->port_cfg[port].member = member;
+}
+
+/**
+ * sw_get_addr - get the switch MAC address.
+ * @hw: The hardware instance.
+ * @mac_addr: Buffer to store the MAC address.
+ *
+ * This function retrieves the MAC address of the switch.
+ */
+static inline void sw_get_addr(struct ksz_hw *hw, u8 *mac_addr)
+{
+ int i;
+
+ for (i = 0; i < 6; i += 2) {
+ mac_addr[i] = readb(hw->io + KS8842_MAC_ADDR_0_OFFSET + i);
+ mac_addr[1 + i] = readb(hw->io + KS8842_MAC_ADDR_1_OFFSET + i);
+ }
+}
+
+/**
+ * sw_set_addr - configure switch MAC address
+ * @hw: The hardware instance.
+ * @mac_addr: The MAC address.
+ *
+ * This function configures the MAC address of the switch.
+ */
+static void sw_set_addr(struct ksz_hw *hw, u8 *mac_addr)
+{
+ int i;
+
+ for (i = 0; i < 6; i += 2) {
+ writeb(mac_addr[i], hw->io + KS8842_MAC_ADDR_0_OFFSET + i);
+ writeb(mac_addr[1 + i], hw->io + KS8842_MAC_ADDR_1_OFFSET + i);
+ }
+}
+
+/**
+ * sw_set_global_ctrl - set switch global control
+ * @hw: The hardware instance.
+ *
+ * This routine sets the global control of the switch function.
+ */
+static void sw_set_global_ctrl(struct ksz_hw *hw)
+{
+ u16 data;
+
+ /* Enable switch MII flow control. */
+ data = readw(hw->io + KS8842_SWITCH_CTRL_3_OFFSET);
+ data |= SWITCH_FLOW_CTRL;
+ writew(data, hw->io + KS8842_SWITCH_CTRL_3_OFFSET);
+
+ data = readw(hw->io + KS8842_SWITCH_CTRL_1_OFFSET);
+
+ /* Enable aggressive back off algorithm in half duplex mode. */
+ data |= SWITCH_AGGR_BACKOFF;
+
+ /* Enable automatic fast aging when link changed detected. */
+ data |= SWITCH_AGING_ENABLE;
+ data |= SWITCH_LINK_AUTO_AGING;
+
+ if (hw->overrides & FAST_AGING)
+ data |= SWITCH_FAST_AGING;
+ else
+ data &= ~SWITCH_FAST_AGING;
+ writew(data, hw->io + KS8842_SWITCH_CTRL_1_OFFSET);
+
+ data = readw(hw->io + KS8842_SWITCH_CTRL_2_OFFSET);
+
+ /* Enable no excessive collision drop. */
+ data |= NO_EXC_COLLISION_DROP;
+ writew(data, hw->io + KS8842_SWITCH_CTRL_2_OFFSET);
+}
+
+enum {
+ STP_STATE_DISABLED = 0,
+ STP_STATE_LISTENING,
+ STP_STATE_LEARNING,
+ STP_STATE_FORWARDING,
+ STP_STATE_BLOCKED,
+ STP_STATE_SIMPLE
+};
+
+/**
+ * port_set_stp_state - configure port spanning tree state
+ * @hw: The hardware instance.
+ * @port: The port index.
+ * @state: The spanning tree state.
+ *
+ * This routine configures the spanning tree state of the port.
+ */
+static void port_set_stp_state(struct ksz_hw *hw, int port, int state)
+{
+ u16 data;
+
+ port_r16(hw, port, KS8842_PORT_CTRL_2_OFFSET, &data);
+ switch (state) {
+ case STP_STATE_DISABLED:
+ data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE);
+ data |= PORT_LEARN_DISABLE;
+ break;
+ case STP_STATE_LISTENING:
+/*
+ * No need to turn on transmit because of port direct mode.
+ * Turning on receive is required if static MAC table is not setup.
+ */
+ data &= ~PORT_TX_ENABLE;
+ data |= PORT_RX_ENABLE;
+ data |= PORT_LEARN_DISABLE;
+ break;
+ case STP_STATE_LEARNING:
+ data &= ~PORT_TX_ENABLE;
+ data |= PORT_RX_ENABLE;
+ data &= ~PORT_LEARN_DISABLE;
+ break;
+ case STP_STATE_FORWARDING:
+ data |= (PORT_TX_ENABLE | PORT_RX_ENABLE);
+ data &= ~PORT_LEARN_DISABLE;
+ break;
+ case STP_STATE_BLOCKED:
+/*
+ * Need to setup static MAC table with override to keep receiving BPDU
+ * messages. See sw_init_stp routine.
+ */
+ data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE);
+ data |= PORT_LEARN_DISABLE;
+ break;
+ case STP_STATE_SIMPLE:
+ data |= (PORT_TX_ENABLE | PORT_RX_ENABLE);
+ data |= PORT_LEARN_DISABLE;
+ break;
+ }
+ port_w16(hw, port, KS8842_PORT_CTRL_2_OFFSET, data);
+ hw->ksz_switch->port_cfg[port].stp_state = state;
+}
+
+#define STP_ENTRY 0
+#define BROADCAST_ENTRY 1
+#define BRIDGE_ADDR_ENTRY 2
+#define IPV6_ADDR_ENTRY 3
+
+/**
+ * sw_clr_sta_mac_table - clear static MAC table
+ * @hw: The hardware instance.
+ *
+ * This routine clears the static MAC table.
+ */
+static void sw_clr_sta_mac_table(struct ksz_hw *hw)
+{
+ struct ksz_mac_table *entry;
+ int i;
+
+ for (i = 0; i < STATIC_MAC_TABLE_ENTRIES; i++) {
+ entry = &hw->ksz_switch->mac_table[i];
+ sw_w_sta_mac_table(hw, i,
+ entry->mac_addr, entry->ports,
+ entry->override, 0,
+ entry->use_fid, entry->fid);
+ }
+}
+
+/**
+ * sw_init_stp - initialize switch spanning tree support
+ * @hw: The hardware instance.
+ *
+ * This routine initializes the spanning tree support of the switch.
+ */
+static void sw_init_stp(struct ksz_hw *hw)
+{
+ struct ksz_mac_table *entry;
+
+ entry = &hw->ksz_switch->mac_table[STP_ENTRY];
+ entry->mac_addr[0] = 0x01;
+ entry->mac_addr[1] = 0x80;
+ entry->mac_addr[2] = 0xC2;
+ entry->mac_addr[3] = 0x00;
+ entry->mac_addr[4] = 0x00;
+ entry->mac_addr[5] = 0x00;
+ entry->ports = HOST_MASK;
+ entry->override = 1;
+ entry->valid = 1;
+ sw_w_sta_mac_table(hw, STP_ENTRY,
+ entry->mac_addr, entry->ports,
+ entry->override, entry->valid,
+ entry->use_fid, entry->fid);
+}
+
+/**
+ * sw_block_addr - block certain packets from the host port
+ * @hw: The hardware instance.
+ *
+ * This routine blocks certain packets from reaching to the host port.
+ */
+static void sw_block_addr(struct ksz_hw *hw)
+{
+ struct ksz_mac_table *entry;
+ int i;
+
+ for (i = BROADCAST_ENTRY; i <= IPV6_ADDR_ENTRY; i++) {
+ entry = &hw->ksz_switch->mac_table[i];
+ entry->valid = 0;
+ sw_w_sta_mac_table(hw, i,
+ entry->mac_addr, entry->ports,
+ entry->override, entry->valid,
+ entry->use_fid, entry->fid);
+ }
+}
+
+#define PHY_LINK_SUPPORT \
+ (PHY_AUTO_NEG_ASYM_PAUSE | \
+ PHY_AUTO_NEG_SYM_PAUSE | \
+ PHY_AUTO_NEG_100BT4 | \
+ PHY_AUTO_NEG_100BTX_FD | \
+ PHY_AUTO_NEG_100BTX | \
+ PHY_AUTO_NEG_10BT_FD | \
+ PHY_AUTO_NEG_10BT)
+
+static inline void hw_r_phy_ctrl(struct ksz_hw *hw, int phy, u16 *data)
+{
+ *data = readw(hw->io + phy + KS884X_PHY_CTRL_OFFSET);
+}
+
+static inline void hw_w_phy_ctrl(struct ksz_hw *hw, int phy, u16 data)
+{
+ writew(data, hw->io + phy + KS884X_PHY_CTRL_OFFSET);
+}
+
+static inline void hw_r_phy_link_stat(struct ksz_hw *hw, int phy, u16 *data)
+{
+ *data = readw(hw->io + phy + KS884X_PHY_STATUS_OFFSET);
+}
+
+static inline void hw_r_phy_auto_neg(struct ksz_hw *hw, int phy, u16 *data)
+{
+ *data = readw(hw->io + phy + KS884X_PHY_AUTO_NEG_OFFSET);
+}
+
+static inline void hw_w_phy_auto_neg(struct ksz_hw *hw, int phy, u16 data)
+{
+ writew(data, hw->io + phy + KS884X_PHY_AUTO_NEG_OFFSET);
+}
+
+static inline void hw_r_phy_rem_cap(struct ksz_hw *hw, int phy, u16 *data)
+{
+ *data = readw(hw->io + phy + KS884X_PHY_REMOTE_CAP_OFFSET);
+}
+
+static inline void hw_r_phy_crossover(struct ksz_hw *hw, int phy, u16 *data)
+{
+ *data = readw(hw->io + phy + KS884X_PHY_CTRL_OFFSET);
+}
+
+static inline void hw_w_phy_crossover(struct ksz_hw *hw, int phy, u16 data)
+{
+ writew(data, hw->io + phy + KS884X_PHY_CTRL_OFFSET);
+}
+
+static inline void hw_r_phy_polarity(struct ksz_hw *hw, int phy, u16 *data)
+{
+ *data = readw(hw->io + phy + KS884X_PHY_PHY_CTRL_OFFSET);
+}
+
+static inline void hw_w_phy_polarity(struct ksz_hw *hw, int phy, u16 data)
+{
+ writew(data, hw->io + phy + KS884X_PHY_PHY_CTRL_OFFSET);
+}
+
+static inline void hw_r_phy_link_md(struct ksz_hw *hw, int phy, u16 *data)
+{
+ *data = readw(hw->io + phy + KS884X_PHY_LINK_MD_OFFSET);
+}
+
+static inline void hw_w_phy_link_md(struct ksz_hw *hw, int phy, u16 data)
+{
+ writew(data, hw->io + phy + KS884X_PHY_LINK_MD_OFFSET);
+}
+
+/**
+ * hw_r_phy - read data from PHY register
+ * @hw: The hardware instance.
+ * @port: Port to read.
+ * @reg: PHY register to read.
+ * @val: Buffer to store the read data.
+ *
+ * This routine reads data from the PHY register.
+ */
+static void hw_r_phy(struct ksz_hw *hw, int port, u16 reg, u16 *val)
+{
+ int phy;
+
+ phy = KS884X_PHY_1_CTRL_OFFSET + port * PHY_CTRL_INTERVAL + reg;
+ *val = readw(hw->io + phy);
+}
+
+/**
+ * port_w_phy - write data to PHY register
+ * @hw: The hardware instance.
+ * @port: Port to write.
+ * @reg: PHY register to write.
+ * @val: Word data to write.
+ *
+ * This routine writes data to the PHY register.
+ */
+static void hw_w_phy(struct ksz_hw *hw, int port, u16 reg, u16 val)
+{
+ int phy;
+
+ phy = KS884X_PHY_1_CTRL_OFFSET + port * PHY_CTRL_INTERVAL + reg;
+ writew(val, hw->io + phy);
+}
+
+/*
+ * EEPROM access functions
+ */
+
+#define AT93C_CODE 0
+#define AT93C_WR_OFF 0x00
+#define AT93C_WR_ALL 0x10
+#define AT93C_ER_ALL 0x20
+#define AT93C_WR_ON 0x30
+
+#define AT93C_WRITE 1
+#define AT93C_READ 2
+#define AT93C_ERASE 3
+
+#define EEPROM_DELAY 4
+
+static inline void drop_gpio(struct ksz_hw *hw, u8 gpio)
+{
+ u16 data;
+
+ data = readw(hw->io + KS884X_EEPROM_CTRL_OFFSET);
+ data &= ~gpio;
+ writew(data, hw->io + KS884X_EEPROM_CTRL_OFFSET);
+}
+
+static inline void raise_gpio(struct ksz_hw *hw, u8 gpio)
+{
+ u16 data;
+
+ data = readw(hw->io + KS884X_EEPROM_CTRL_OFFSET);
+ data |= gpio;
+ writew(data, hw->io + KS884X_EEPROM_CTRL_OFFSET);
+}
+
+static inline u8 state_gpio(struct ksz_hw *hw, u8 gpio)
+{
+ u16 data;
+
+ data = readw(hw->io + KS884X_EEPROM_CTRL_OFFSET);
+ return (u8)(data & gpio);
+}
+
+static void eeprom_clk(struct ksz_hw *hw)
+{
+ raise_gpio(hw, EEPROM_SERIAL_CLOCK);
+ udelay(EEPROM_DELAY);
+ drop_gpio(hw, EEPROM_SERIAL_CLOCK);
+ udelay(EEPROM_DELAY);
+}
+
+static u16 spi_r(struct ksz_hw *hw)
+{
+ int i;
+ u16 temp = 0;
+
+ for (i = 15; i >= 0; i--) {
+ raise_gpio(hw, EEPROM_SERIAL_CLOCK);
+ udelay(EEPROM_DELAY);
+
+ temp |= (state_gpio(hw, EEPROM_DATA_IN)) ? 1 << i : 0;
+
+ drop_gpio(hw, EEPROM_SERIAL_CLOCK);
+ udelay(EEPROM_DELAY);
+ }
+ return temp;
+}
+
+static void spi_w(struct ksz_hw *hw, u16 data)
+{
+ int i;
+
+ for (i = 15; i >= 0; i--) {
+ (data & (0x01 << i)) ? raise_gpio(hw, EEPROM_DATA_OUT) :
+ drop_gpio(hw, EEPROM_DATA_OUT);
+ eeprom_clk(hw);
+ }
+}
+
+static void spi_reg(struct ksz_hw *hw, u8 data, u8 reg)
+{
+ int i;
+
+ /* Initial start bit */
+ raise_gpio(hw, EEPROM_DATA_OUT);
+ eeprom_clk(hw);
+
+ /* AT93C operation */
+ for (i = 1; i >= 0; i--) {
+ (data & (0x01 << i)) ? raise_gpio(hw, EEPROM_DATA_OUT) :
+ drop_gpio(hw, EEPROM_DATA_OUT);
+ eeprom_clk(hw);
+ }
+
+ /* Address location */
+ for (i = 5; i >= 0; i--) {
+ (reg & (0x01 << i)) ? raise_gpio(hw, EEPROM_DATA_OUT) :
+ drop_gpio(hw, EEPROM_DATA_OUT);
+ eeprom_clk(hw);
+ }
+}
+
+#define EEPROM_DATA_RESERVED 0
+#define EEPROM_DATA_MAC_ADDR_0 1
+#define EEPROM_DATA_MAC_ADDR_1 2
+#define EEPROM_DATA_MAC_ADDR_2 3
+#define EEPROM_DATA_SUBSYS_ID 4
+#define EEPROM_DATA_SUBSYS_VEN_ID 5
+#define EEPROM_DATA_PM_CAP 6
+
+/* User defined EEPROM data */
+#define EEPROM_DATA_OTHER_MAC_ADDR 9
+
+/**
+ * eeprom_read - read from AT93C46 EEPROM
+ * @hw: The hardware instance.
+ * @reg: The register offset.
+ *
+ * This function reads a word from the AT93C46 EEPROM.
+ *
+ * Return the data value.
+ */
+static u16 eeprom_read(struct ksz_hw *hw, u8 reg)
+{
+ u16 data;
+
+ raise_gpio(hw, EEPROM_ACCESS_ENABLE | EEPROM_CHIP_SELECT);
+
+ spi_reg(hw, AT93C_READ, reg);
+ data = spi_r(hw);
+
+ drop_gpio(hw, EEPROM_ACCESS_ENABLE | EEPROM_CHIP_SELECT);
+
+ return data;
+}
+
+/**
+ * eeprom_write - write to AT93C46 EEPROM
+ * @hw: The hardware instance.
+ * @reg: The register offset.
+ * @data: The data value.
+ *
+ * This procedure writes a word to the AT93C46 EEPROM.
+ */
+static void eeprom_write(struct ksz_hw *hw, u8 reg, u16 data)
+{
+ int timeout;
+
+ raise_gpio(hw, EEPROM_ACCESS_ENABLE | EEPROM_CHIP_SELECT);
+
+ /* Enable write. */
+ spi_reg(hw, AT93C_CODE, AT93C_WR_ON);
+ drop_gpio(hw, EEPROM_CHIP_SELECT);
+ udelay(1);
+
+ /* Erase the register. */
+ raise_gpio(hw, EEPROM_CHIP_SELECT);
+ spi_reg(hw, AT93C_ERASE, reg);
+ drop_gpio(hw, EEPROM_CHIP_SELECT);
+ udelay(1);
+
+ /* Check operation complete. */
+ raise_gpio(hw, EEPROM_CHIP_SELECT);
+ timeout = 8;
+ mdelay(2);
+ do {
+ mdelay(1);
+ } while (!state_gpio(hw, EEPROM_DATA_IN) && --timeout);
+ drop_gpio(hw, EEPROM_CHIP_SELECT);
+ udelay(1);
+
+ /* Write the register. */
+ raise_gpio(hw, EEPROM_CHIP_SELECT);
+ spi_reg(hw, AT93C_WRITE, reg);
+ spi_w(hw, data);
+ drop_gpio(hw, EEPROM_CHIP_SELECT);
+ udelay(1);
+
+ /* Check operation complete. */
+ raise_gpio(hw, EEPROM_CHIP_SELECT);
+ timeout = 8;
+ mdelay(2);
+ do {
+ mdelay(1);
+ } while (!state_gpio(hw, EEPROM_DATA_IN) && --timeout);
+ drop_gpio(hw, EEPROM_CHIP_SELECT);
+ udelay(1);
+
+ /* Disable write. */
+ raise_gpio(hw, EEPROM_CHIP_SELECT);
+ spi_reg(hw, AT93C_CODE, AT93C_WR_OFF);
+
+ drop_gpio(hw, EEPROM_ACCESS_ENABLE | EEPROM_CHIP_SELECT);
+}
+
+/*
+ * Link detection routines
+ */
+
+static u16 advertised_flow_ctrl(struct ksz_port *port, u16 ctrl)
+{
+ ctrl &= ~PORT_AUTO_NEG_SYM_PAUSE;
+ switch (port->flow_ctrl) {
+ case PHY_FLOW_CTRL:
+ ctrl |= PORT_AUTO_NEG_SYM_PAUSE;
+ break;
+ /* Not supported. */
+ case PHY_TX_ONLY:
+ case PHY_RX_ONLY:
+ default:
+ break;
+ }
+ return ctrl;
+}
+
+static void set_flow_ctrl(struct ksz_hw *hw, int rx, int tx)
+{
+ u32 rx_cfg;
+ u32 tx_cfg;
+
+ rx_cfg = hw->rx_cfg;
+ tx_cfg = hw->tx_cfg;
+ if (rx)
+ hw->rx_cfg |= DMA_RX_FLOW_ENABLE;
+ else
+ hw->rx_cfg &= ~DMA_RX_FLOW_ENABLE;
+ if (tx)
+ hw->tx_cfg |= DMA_TX_FLOW_ENABLE;
+ else
+ hw->tx_cfg &= ~DMA_TX_FLOW_ENABLE;
+ if (hw->enabled) {
+ if (rx_cfg != hw->rx_cfg)
+ writel(hw->rx_cfg, hw->io + KS_DMA_RX_CTRL);
+ if (tx_cfg != hw->tx_cfg)
+ writel(hw->tx_cfg, hw->io + KS_DMA_TX_CTRL);
+ }
+}
+
+static void determine_flow_ctrl(struct ksz_hw *hw, struct ksz_port *port,
+ u16 local, u16 remote)
+{
+ int rx;
+ int tx;
+
+ if (hw->overrides & PAUSE_FLOW_CTRL)
+ return;
+
+ rx = tx = 0;
+ if (port->force_link)
+ rx = tx = 1;
+ if (remote & PHY_AUTO_NEG_SYM_PAUSE) {
+ if (local & PHY_AUTO_NEG_SYM_PAUSE) {
+ rx = tx = 1;
+ } else if ((remote & PHY_AUTO_NEG_ASYM_PAUSE) &&
+ (local & PHY_AUTO_NEG_PAUSE) ==
+ PHY_AUTO_NEG_ASYM_PAUSE) {
+ tx = 1;
+ }
+ } else if (remote & PHY_AUTO_NEG_ASYM_PAUSE) {
+ if ((local & PHY_AUTO_NEG_PAUSE) == PHY_AUTO_NEG_PAUSE)
+ rx = 1;
+ }
+ if (!hw->ksz_switch)
+ set_flow_ctrl(hw, rx, tx);
+}
+
+static inline void port_cfg_change(struct ksz_hw *hw, struct ksz_port *port,
+ struct ksz_port_info *info, u16 link_status)
+{
+ if ((hw->features & HALF_DUPLEX_SIGNAL_BUG) &&
+ !(hw->overrides & PAUSE_FLOW_CTRL)) {
+ u32 cfg = hw->tx_cfg;
+
+ /* Disable flow control in the half duplex mode. */
+ if (1 == info->duplex)
+ hw->tx_cfg &= ~DMA_TX_FLOW_ENABLE;
+ if (hw->enabled && cfg != hw->tx_cfg)
+ writel(hw->tx_cfg, hw->io + KS_DMA_TX_CTRL);
+ }
+}
+
+/**
+ * port_get_link_speed - get current link status
+ * @port: The port instance.
+ *
+ * This routine reads PHY registers to determine the current link status of the
+ * switch ports.
+ */
+static void port_get_link_speed(struct ksz_port *port)
+{
+ uint interrupt;
+ struct ksz_port_info *info;
+ struct ksz_port_info *linked = NULL;
+ struct ksz_hw *hw = port->hw;
+ u16 data;
+ u16 status;
+ u8 local;
+ u8 remote;
+ int i;
+ int p;
+ int change = 0;
+
+ interrupt = hw_block_intr(hw);
+
+ for (i = 0, p = port->first_port; i < port->port_cnt; i++, p++) {
+ info = &hw->port_info[p];
+ port_r16(hw, p, KS884X_PORT_CTRL_4_OFFSET, &data);
+ port_r16(hw, p, KS884X_PORT_STATUS_OFFSET, &status);
+
+ /*
+ * Link status is changing all the time even when there is no
+ * cable connection!
+ */
+ remote = status & (PORT_AUTO_NEG_COMPLETE |
+ PORT_STATUS_LINK_GOOD);
+ local = (u8) data;
+
+ /* No change to status. */
+ if (local == info->advertised && remote == info->partner)
+ continue;
+
+ info->advertised = local;
+ info->partner = remote;
+ if (status & PORT_STATUS_LINK_GOOD) {
+
+ /* Remember the first linked port. */
+ if (!linked)
+ linked = info;
+
+ info->tx_rate = 10 * TX_RATE_UNIT;
+ if (status & PORT_STATUS_SPEED_100MBIT)
+ info->tx_rate = 100 * TX_RATE_UNIT;
+
+ info->duplex = 1;
+ if (status & PORT_STATUS_FULL_DUPLEX)
+ info->duplex = 2;
+
+ if (media_connected != info->state) {
+ hw_r_phy(hw, p, KS884X_PHY_AUTO_NEG_OFFSET,
+ &data);
+ hw_r_phy(hw, p, KS884X_PHY_REMOTE_CAP_OFFSET,
+ &status);
+ determine_flow_ctrl(hw, port, data, status);
+ if (hw->ksz_switch) {
+ port_cfg_back_pressure(hw, p,
+ (1 == info->duplex));
+ }
+ change |= 1 << i;
+ port_cfg_change(hw, port, info, status);
+ }
+ info->state = media_connected;
+ } else {
+ if (media_disconnected != info->state) {
+ change |= 1 << i;
+
+ /* Indicate the link just goes down. */
+ hw->port_mib[p].link_down = 1;
+ }
+ info->state = media_disconnected;
+ }
+ hw->port_mib[p].state = (u8) info->state;
+ }
+
+ if (linked && media_disconnected == port->linked->state)
+ port->linked = linked;
+
+ hw_restore_intr(hw, interrupt);
+}
+
+#define PHY_RESET_TIMEOUT 10
+
+/**
+ * port_set_link_speed - set port speed
+ * @port: The port instance.
+ *
+ * This routine sets the link speed of the switch ports.
+ */
+static void port_set_link_speed(struct ksz_port *port)
+{
+ struct ksz_port_info *info;
+ struct ksz_hw *hw = port->hw;
+ u16 data;
+ u16 cfg;
+ u8 status;
+ int i;
+ int p;
+
+ for (i = 0, p = port->first_port; i < port->port_cnt; i++, p++) {
+ info = &hw->port_info[p];
+
+ port_r16(hw, p, KS884X_PORT_CTRL_4_OFFSET, &data);
+ port_r8(hw, p, KS884X_PORT_STATUS_OFFSET, &status);
+
+ cfg = 0;
+ if (status & PORT_STATUS_LINK_GOOD)
+ cfg = data;
+
+ data |= PORT_AUTO_NEG_ENABLE;
+ data = advertised_flow_ctrl(port, data);
+
+ data |= PORT_AUTO_NEG_100BTX_FD | PORT_AUTO_NEG_100BTX |
+ PORT_AUTO_NEG_10BT_FD | PORT_AUTO_NEG_10BT;
+
+ /* Check if manual configuration is specified by the user. */
+ if (port->speed || port->duplex) {
+ if (10 == port->speed)
+ data &= ~(PORT_AUTO_NEG_100BTX_FD |
+ PORT_AUTO_NEG_100BTX);
+ else if (100 == port->speed)
+ data &= ~(PORT_AUTO_NEG_10BT_FD |
+ PORT_AUTO_NEG_10BT);
+ if (1 == port->duplex)
+ data &= ~(PORT_AUTO_NEG_100BTX_FD |
+ PORT_AUTO_NEG_10BT_FD);
+ else if (2 == port->duplex)
+ data &= ~(PORT_AUTO_NEG_100BTX |
+ PORT_AUTO_NEG_10BT);
+ }
+ if (data != cfg) {
+ data |= PORT_AUTO_NEG_RESTART;
+ port_w16(hw, p, KS884X_PORT_CTRL_4_OFFSET, data);
+ }
+ }
+}
+
+/**
+ * port_force_link_speed - force port speed
+ * @port: The port instance.
+ *
+ * This routine forces the link speed of the switch ports.
+ */
+static void port_force_link_speed(struct ksz_port *port)
+{
+ struct ksz_hw *hw = port->hw;
+ u16 data;
+ int i;
+ int phy;
+ int p;
+
+ for (i = 0, p = port->first_port; i < port->port_cnt; i++, p++) {
+ phy = KS884X_PHY_1_CTRL_OFFSET + p * PHY_CTRL_INTERVAL;
+ hw_r_phy_ctrl(hw, phy, &data);
+
+ data &= ~PHY_AUTO_NEG_ENABLE;
+
+ if (10 == port->speed)
+ data &= ~PHY_SPEED_100MBIT;
+ else if (100 == port->speed)
+ data |= PHY_SPEED_100MBIT;
+ if (1 == port->duplex)
+ data &= ~PHY_FULL_DUPLEX;
+ else if (2 == port->duplex)
+ data |= PHY_FULL_DUPLEX;
+ hw_w_phy_ctrl(hw, phy, data);
+ }
+}
+
+static void port_set_power_saving(struct ksz_port *port, int enable)
+{
+ struct ksz_hw *hw = port->hw;
+ int i;
+ int p;
+
+ for (i = 0, p = port->first_port; i < port->port_cnt; i++, p++)
+ port_cfg(hw, p,
+ KS884X_PORT_CTRL_4_OFFSET, PORT_POWER_DOWN, enable);
+}
+
+/*
+ * KSZ8841 power management functions
+ */
+
+/**
+ * hw_chk_wol_pme_status - check PMEN pin
+ * @hw: The hardware instance.
+ *
+ * This function is used to check PMEN pin is asserted.
+ *
+ * Return 1 if PMEN pin is asserted; otherwise, 0.
+ */
+static int hw_chk_wol_pme_status(struct ksz_hw *hw)
+{
+ struct dev_info *hw_priv = container_of(hw, struct dev_info, hw);
+ struct pci_dev *pdev = hw_priv->pdev;
+ u16 data;
+
+ if (!pdev->pm_cap)
+ return 0;
+ pci_read_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, &data);
+ return (data & PCI_PM_CTRL_PME_STATUS) == PCI_PM_CTRL_PME_STATUS;
+}
+
+/**
+ * hw_clr_wol_pme_status - clear PMEN pin
+ * @hw: The hardware instance.
+ *
+ * This routine is used to clear PME_Status to deassert PMEN pin.
+ */
+static void hw_clr_wol_pme_status(struct ksz_hw *hw)
+{
+ struct dev_info *hw_priv = container_of(hw, struct dev_info, hw);
+ struct pci_dev *pdev = hw_priv->pdev;
+ u16 data;
+
+ if (!pdev->pm_cap)
+ return;
+
+ /* Clear PME_Status to deassert PMEN pin. */
+ pci_read_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, &data);
+ data |= PCI_PM_CTRL_PME_STATUS;
+ pci_write_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, data);
+}
+
+/**
+ * hw_cfg_wol_pme - enable or disable Wake-on-LAN
+ * @hw: The hardware instance.
+ * @set: The flag indicating whether to enable or disable.
+ *
+ * This routine is used to enable or disable Wake-on-LAN.
+ */
+static void hw_cfg_wol_pme(struct ksz_hw *hw, int set)
+{
+ struct dev_info *hw_priv = container_of(hw, struct dev_info, hw);
+ struct pci_dev *pdev = hw_priv->pdev;
+ u16 data;
+
+ if (!pdev->pm_cap)
+ return;
+ pci_read_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, &data);
+ data &= ~PCI_PM_CTRL_STATE_MASK;
+ if (set)
+ data |= PCI_PM_CTRL_PME_ENABLE | PCI_D3hot;
+ else
+ data &= ~PCI_PM_CTRL_PME_ENABLE;
+ pci_write_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, data);
+}
+
+/**
+ * hw_cfg_wol - configure Wake-on-LAN features
+ * @hw: The hardware instance.
+ * @frame: The pattern frame bit.
+ * @set: The flag indicating whether to enable or disable.
+ *
+ * This routine is used to enable or disable certain Wake-on-LAN features.
+ */
+static void hw_cfg_wol(struct ksz_hw *hw, u16 frame, int set)
+{
+ u16 data;
+
+ data = readw(hw->io + KS8841_WOL_CTRL_OFFSET);
+ if (set)
+ data |= frame;
+ else
+ data &= ~frame;
+ writew(data, hw->io + KS8841_WOL_CTRL_OFFSET);
+}
+
+/**
+ * hw_set_wol_frame - program Wake-on-LAN pattern
+ * @hw: The hardware instance.
+ * @i: The frame index.
+ * @mask_size: The size of the mask.
+ * @mask: Mask to ignore certain bytes in the pattern.
+ * @frame_size: The size of the frame.
+ * @pattern: The frame data.
+ *
+ * This routine is used to program Wake-on-LAN pattern.
+ */
+static void hw_set_wol_frame(struct ksz_hw *hw, int i, uint mask_size,
+ const u8 *mask, uint frame_size, const u8 *pattern)
+{
+ int bits;
+ int from;
+ int len;
+ int to;
+ u32 crc;
+ u8 data[64];
+ u8 val = 0;
+
+ if (frame_size > mask_size * 8)
+ frame_size = mask_size * 8;
+ if (frame_size > 64)
+ frame_size = 64;
+
+ i *= 0x10;
+ writel(0, hw->io + KS8841_WOL_FRAME_BYTE0_OFFSET + i);
+ writel(0, hw->io + KS8841_WOL_FRAME_BYTE2_OFFSET + i);
+
+ bits = len = from = to = 0;
+ do {
+ if (bits) {
+ if ((val & 1))
+ data[to++] = pattern[from];
+ val >>= 1;
+ ++from;
+ --bits;
+ } else {
+ val = mask[len];
+ writeb(val, hw->io + KS8841_WOL_FRAME_BYTE0_OFFSET + i
+ + len);
+ ++len;
+ if (val)
+ bits = 8;
+ else
+ from += 8;
+ }
+ } while (from < (int) frame_size);
+ if (val) {
+ bits = mask[len - 1];
+ val <<= (from % 8);
+ bits &= ~val;
+ writeb(bits, hw->io + KS8841_WOL_FRAME_BYTE0_OFFSET + i + len -
+ 1);
+ }
+ crc = ether_crc(to, data);
+ writel(crc, hw->io + KS8841_WOL_FRAME_CRC_OFFSET + i);
+}
+
+/**
+ * hw_add_wol_arp - add ARP pattern
+ * @hw: The hardware instance.
+ * @ip_addr: The IPv4 address assigned to the device.
+ *
+ * This routine is used to add ARP pattern for waking up the host.
+ */
+static void hw_add_wol_arp(struct ksz_hw *hw, const u8 *ip_addr)
+{
+ static const u8 mask[6] = { 0x3F, 0xF0, 0x3F, 0x00, 0xC0, 0x03 };
+ u8 pattern[42] = {
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x08, 0x06,
+ 0x00, 0x01, 0x08, 0x00, 0x06, 0x04, 0x00, 0x01,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00 };
+
+ memcpy(&pattern[38], ip_addr, 4);
+ hw_set_wol_frame(hw, 3, 6, mask, 42, pattern);
+}
+
+/**
+ * hw_add_wol_bcast - add broadcast pattern
+ * @hw: The hardware instance.
+ *
+ * This routine is used to add broadcast pattern for waking up the host.
+ */
+static void hw_add_wol_bcast(struct ksz_hw *hw)
+{
+ static const u8 mask[] = { 0x3F };
+ static const u8 pattern[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+
+ hw_set_wol_frame(hw, 2, 1, mask, ETH_ALEN, pattern);
+}
+
+/**
+ * hw_add_wol_mcast - add multicast pattern
+ * @hw: The hardware instance.
+ *
+ * This routine is used to add multicast pattern for waking up the host.
+ *
+ * It is assumed the multicast packet is the ICMPv6 neighbor solicitation used
+ * by IPv6 ping command. Note that multicast packets are filtred through the
+ * multicast hash table, so not all multicast packets can wake up the host.
+ */
+static void hw_add_wol_mcast(struct ksz_hw *hw)
+{
+ static const u8 mask[] = { 0x3F };
+ u8 pattern[] = { 0x33, 0x33, 0xFF, 0x00, 0x00, 0x00 };
+
+ memcpy(&pattern[3], &hw->override_addr[3], 3);
+ hw_set_wol_frame(hw, 1, 1, mask, 6, pattern);
+}
+
+/**
+ * hw_add_wol_ucast - add unicast pattern
+ * @hw: The hardware instance.
+ *
+ * This routine is used to add unicast pattern to wakeup the host.
+ *
+ * It is assumed the unicast packet is directed to the device, as the hardware
+ * can only receive them in normal case.
+ */
+static void hw_add_wol_ucast(struct ksz_hw *hw)
+{
+ static const u8 mask[] = { 0x3F };
+
+ hw_set_wol_frame(hw, 0, 1, mask, ETH_ALEN, hw->override_addr);
+}
+
+/**
+ * hw_enable_wol - enable Wake-on-LAN
+ * @hw: The hardware instance.
+ * @wol_enable: The Wake-on-LAN settings.
+ * @net_addr: The IPv4 address assigned to the device.
+ *
+ * This routine is used to enable Wake-on-LAN depending on driver settings.
+ */
+static void hw_enable_wol(struct ksz_hw *hw, u32 wol_enable, const u8 *net_addr)
+{
+ hw_cfg_wol(hw, KS8841_WOL_MAGIC_ENABLE, (wol_enable & WAKE_MAGIC));
+ hw_cfg_wol(hw, KS8841_WOL_FRAME0_ENABLE, (wol_enable & WAKE_UCAST));
+ hw_add_wol_ucast(hw);
+ hw_cfg_wol(hw, KS8841_WOL_FRAME1_ENABLE, (wol_enable & WAKE_MCAST));
+ hw_add_wol_mcast(hw);
+ hw_cfg_wol(hw, KS8841_WOL_FRAME2_ENABLE, (wol_enable & WAKE_BCAST));
+ hw_cfg_wol(hw, KS8841_WOL_FRAME3_ENABLE, (wol_enable & WAKE_ARP));
+ hw_add_wol_arp(hw, net_addr);
+}
+
+/**
+ * hw_init - check driver is correct for the hardware
+ * @hw: The hardware instance.
+ *
+ * This function checks the hardware is correct for this driver and sets the
+ * hardware up for proper initialization.
+ *
+ * Return number of ports or 0 if not right.
+ */
+static int hw_init(struct ksz_hw *hw)
+{
+ int rc = 0;
+ u16 data;
+ u16 revision;
+
+ /* Set bus speed to 125MHz. */
+ writew(BUS_SPEED_125_MHZ, hw->io + KS884X_BUS_CTRL_OFFSET);
+
+ /* Check KSZ884x chip ID. */
+ data = readw(hw->io + KS884X_CHIP_ID_OFFSET);
+
+ revision = (data & KS884X_REVISION_MASK) >> KS884X_REVISION_SHIFT;
+ data &= KS884X_CHIP_ID_MASK_41;
+ if (REG_CHIP_ID_41 == data)
+ rc = 1;
+ else if (REG_CHIP_ID_42 == data)
+ rc = 2;
+ else
+ return 0;
+
+ /* Setup hardware features or bug workarounds. */
+ if (revision <= 1) {
+ hw->features |= SMALL_PACKET_TX_BUG;
+ if (1 == rc)
+ hw->features |= HALF_DUPLEX_SIGNAL_BUG;
+ }
+ return rc;
+}
+
+/**
+ * hw_reset - reset the hardware
+ * @hw: The hardware instance.
+ *
+ * This routine resets the hardware.
+ */
+static void hw_reset(struct ksz_hw *hw)
+{
+ writew(GLOBAL_SOFTWARE_RESET, hw->io + KS884X_GLOBAL_CTRL_OFFSET);
+
+ /* Wait for device to reset. */
+ mdelay(10);
+
+ /* Write 0 to clear device reset. */
+ writew(0, hw->io + KS884X_GLOBAL_CTRL_OFFSET);
+}
+
+/**
+ * hw_setup - setup the hardware
+ * @hw: The hardware instance.
+ *
+ * This routine setup the hardware for proper operation.
+ */
+static void hw_setup(struct ksz_hw *hw)
+{
+#if SET_DEFAULT_LED
+ u16 data;
+
+ /* Change default LED mode. */
+ data = readw(hw->io + KS8842_SWITCH_CTRL_5_OFFSET);
+ data &= ~LED_MODE;
+ data |= SET_DEFAULT_LED;
+ writew(data, hw->io + KS8842_SWITCH_CTRL_5_OFFSET);
+#endif
+
+ /* Setup transmit control. */
+ hw->tx_cfg = (DMA_TX_PAD_ENABLE | DMA_TX_CRC_ENABLE |
+ (DMA_BURST_DEFAULT << DMA_BURST_SHIFT) | DMA_TX_ENABLE);
+
+ /* Setup receive control. */
+ hw->rx_cfg = (DMA_RX_BROADCAST | DMA_RX_UNICAST |
+ (DMA_BURST_DEFAULT << DMA_BURST_SHIFT) | DMA_RX_ENABLE);
+ hw->rx_cfg |= KS884X_DMA_RX_MULTICAST;
+
+ /* Hardware cannot handle UDP packet in IP fragments. */
+ hw->rx_cfg |= (DMA_RX_CSUM_TCP | DMA_RX_CSUM_IP);
+
+ if (hw->all_multi)
+ hw->rx_cfg |= DMA_RX_ALL_MULTICAST;
+ if (hw->promiscuous)
+ hw->rx_cfg |= DMA_RX_PROMISCUOUS;
+}
+
+/**
+ * hw_setup_intr - setup interrupt mask
+ * @hw: The hardware instance.
+ *
+ * This routine setup the interrupt mask for proper operation.
+ */
+static void hw_setup_intr(struct ksz_hw *hw)
+{
+ hw->intr_mask = KS884X_INT_MASK | KS884X_INT_RX_OVERRUN;
+}
+
+static void ksz_check_desc_num(struct ksz_desc_info *info)
+{
+#define MIN_DESC_SHIFT 2
+
+ int alloc = info->alloc;
+ int shift;
+
+ shift = 0;
+ while (!(alloc & 1)) {
+ shift++;
+ alloc >>= 1;
+ }
+ if (alloc != 1 || shift < MIN_DESC_SHIFT) {
+ pr_alert("Hardware descriptor numbers not right!\n");
+ while (alloc) {
+ shift++;
+ alloc >>= 1;
+ }
+ if (shift < MIN_DESC_SHIFT)
+ shift = MIN_DESC_SHIFT;
+ alloc = 1 << shift;
+ info->alloc = alloc;
+ }
+ info->mask = info->alloc - 1;
+}
+
+static void hw_init_desc(struct ksz_desc_info *desc_info, int transmit)
+{
+ int i;
+ u32 phys = desc_info->ring_phys;
+ struct ksz_hw_desc *desc = desc_info->ring_virt;
+ struct ksz_desc *cur = desc_info->ring;
+ struct ksz_desc *previous = NULL;
+
+ for (i = 0; i < desc_info->alloc; i++) {
+ cur->phw = desc++;
+ phys += desc_info->size;
+ previous = cur++;
+ previous->phw->next = cpu_to_le32(phys);
+ }
+ previous->phw->next = cpu_to_le32(desc_info->ring_phys);
+ previous->sw.buf.rx.end_of_ring = 1;
+ previous->phw->buf.data = cpu_to_le32(previous->sw.buf.data);
+
+ desc_info->avail = desc_info->alloc;
+ desc_info->last = desc_info->next = 0;
+
+ desc_info->cur = desc_info->ring;
+}
+
+/**
+ * hw_set_desc_base - set descriptor base addresses
+ * @hw: The hardware instance.
+ * @tx_addr: The transmit descriptor base.
+ * @rx_addr: The receive descriptor base.
+ *
+ * This routine programs the descriptor base addresses after reset.
+ */
+static void hw_set_desc_base(struct ksz_hw *hw, u32 tx_addr, u32 rx_addr)
+{
+ /* Set base address of Tx/Rx descriptors. */
+ writel(tx_addr, hw->io + KS_DMA_TX_ADDR);
+ writel(rx_addr, hw->io + KS_DMA_RX_ADDR);
+}
+
+static void hw_reset_pkts(struct ksz_desc_info *info)
+{
+ info->cur = info->ring;
+ info->avail = info->alloc;
+ info->last = info->next = 0;
+}
+
+static inline void hw_resume_rx(struct ksz_hw *hw)
+{
+ writel(DMA_START, hw->io + KS_DMA_RX_START);
+}
+
+/**
+ * hw_start_rx - start receiving
+ * @hw: The hardware instance.
+ *
+ * This routine starts the receive function of the hardware.
+ */
+static void hw_start_rx(struct ksz_hw *hw)
+{
+ writel(hw->rx_cfg, hw->io + KS_DMA_RX_CTRL);
+
+ /* Notify when the receive stops. */
+ hw->intr_mask |= KS884X_INT_RX_STOPPED;
+
+ writel(DMA_START, hw->io + KS_DMA_RX_START);
+ hw_ack_intr(hw, KS884X_INT_RX_STOPPED);
+ hw->rx_stop++;
+
+ /* Variable overflows. */
+ if (0 == hw->rx_stop)
+ hw->rx_stop = 2;
+}
+
+/**
+ * hw_stop_rx - stop receiving
+ * @hw: The hardware instance.
+ *
+ * This routine stops the receive function of the hardware.
+ */
+static void hw_stop_rx(struct ksz_hw *hw)
+{
+ hw->rx_stop = 0;
+ hw_turn_off_intr(hw, KS884X_INT_RX_STOPPED);
+ writel((hw->rx_cfg & ~DMA_RX_ENABLE), hw->io + KS_DMA_RX_CTRL);
+}
+
+/**
+ * hw_start_tx - start transmitting
+ * @hw: The hardware instance.
+ *
+ * This routine starts the transmit function of the hardware.
+ */
+static void hw_start_tx(struct ksz_hw *hw)
+{
+ writel(hw->tx_cfg, hw->io + KS_DMA_TX_CTRL);
+}
+
+/**
+ * hw_stop_tx - stop transmitting
+ * @hw: The hardware instance.
+ *
+ * This routine stops the transmit function of the hardware.
+ */
+static void hw_stop_tx(struct ksz_hw *hw)
+{
+ writel((hw->tx_cfg & ~DMA_TX_ENABLE), hw->io + KS_DMA_TX_CTRL);
+}
+
+/**
+ * hw_disable - disable hardware
+ * @hw: The hardware instance.
+ *
+ * This routine disables the hardware.
+ */
+static void hw_disable(struct ksz_hw *hw)
+{
+ hw_stop_rx(hw);
+ hw_stop_tx(hw);
+ hw->enabled = 0;
+}
+
+/**
+ * hw_enable - enable hardware
+ * @hw: The hardware instance.
+ *
+ * This routine enables the hardware.
+ */
+static void hw_enable(struct ksz_hw *hw)
+{
+ hw_start_tx(hw);
+ hw_start_rx(hw);
+ hw->enabled = 1;
+}
+
+/**
+ * hw_alloc_pkt - allocate enough descriptors for transmission
+ * @hw: The hardware instance.
+ * @length: The length of the packet.
+ * @physical: Number of descriptors required.
+ *
+ * This function allocates descriptors for transmission.
+ *
+ * Return 0 if not successful; 1 for buffer copy; or number of descriptors.
+ */
+static int hw_alloc_pkt(struct ksz_hw *hw, int length, int physical)
+{
+ /* Always leave one descriptor free. */
+ if (hw->tx_desc_info.avail <= 1)
+ return 0;
+
+ /* Allocate a descriptor for transmission and mark it current. */
+ get_tx_pkt(&hw->tx_desc_info, &hw->tx_desc_info.cur);
+ hw->tx_desc_info.cur->sw.buf.tx.first_seg = 1;
+
+ /* Keep track of number of transmit descriptors used so far. */
+ ++hw->tx_int_cnt;
+ hw->tx_size += length;
+
+ /* Cannot hold on too much data. */
+ if (hw->tx_size >= MAX_TX_HELD_SIZE)
+ hw->tx_int_cnt = hw->tx_int_mask + 1;
+
+ if (physical > hw->tx_desc_info.avail)
+ return 1;
+
+ return hw->tx_desc_info.avail;
+}
+
+/**
+ * hw_send_pkt - mark packet for transmission
+ * @hw: The hardware instance.
+ *
+ * This routine marks the packet for transmission in PCI version.
+ */
+static void hw_send_pkt(struct ksz_hw *hw)
+{
+ struct ksz_desc *cur = hw->tx_desc_info.cur;
+
+ cur->sw.buf.tx.last_seg = 1;
+
+ /* Interrupt only after specified number of descriptors used. */
+ if (hw->tx_int_cnt > hw->tx_int_mask) {
+ cur->sw.buf.tx.intr = 1;
+ hw->tx_int_cnt = 0;
+ hw->tx_size = 0;
+ }
+
+ /* KSZ8842 supports port directed transmission. */
+ cur->sw.buf.tx.dest_port = hw->dst_ports;
+
+ release_desc(cur);
+
+ writel(0, hw->io + KS_DMA_TX_START);
+}
+
+static int empty_addr(u8 *addr)
+{
+ u32 *addr1 = (u32 *) addr;
+ u16 *addr2 = (u16 *) &addr[4];
+
+ return 0 == *addr1 && 0 == *addr2;
+}
+
+/**
+ * hw_set_addr - set MAC address
+ * @hw: The hardware instance.
+ *
+ * This routine programs the MAC address of the hardware when the address is
+ * overrided.
+ */
+static void hw_set_addr(struct ksz_hw *hw)
+{
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ writeb(hw->override_addr[MAC_ADDR_ORDER(i)],
+ hw->io + KS884X_ADDR_0_OFFSET + i);
+
+ sw_set_addr(hw, hw->override_addr);
+}
+
+/**
+ * hw_read_addr - read MAC address
+ * @hw: The hardware instance.
+ *
+ * This routine retrieves the MAC address of the hardware.
+ */
+static void hw_read_addr(struct ksz_hw *hw)
+{
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ hw->perm_addr[MAC_ADDR_ORDER(i)] = readb(hw->io +
+ KS884X_ADDR_0_OFFSET + i);
+
+ if (!hw->mac_override) {
+ memcpy(hw->override_addr, hw->perm_addr, ETH_ALEN);
+ if (empty_addr(hw->override_addr)) {
+ memcpy(hw->perm_addr, DEFAULT_MAC_ADDRESS, ETH_ALEN);
+ memcpy(hw->override_addr, DEFAULT_MAC_ADDRESS,
+ ETH_ALEN);
+ hw->override_addr[5] += hw->id;
+ hw_set_addr(hw);
+ }
+ }
+}
+
+static void hw_ena_add_addr(struct ksz_hw *hw, int index, u8 *mac_addr)
+{
+ int i;
+ u32 mac_addr_lo;
+ u32 mac_addr_hi;
+
+ mac_addr_hi = 0;
+ for (i = 0; i < 2; i++) {
+ mac_addr_hi <<= 8;
+ mac_addr_hi |= mac_addr[i];
+ }
+ mac_addr_hi |= ADD_ADDR_ENABLE;
+ mac_addr_lo = 0;
+ for (i = 2; i < 6; i++) {
+ mac_addr_lo <<= 8;
+ mac_addr_lo |= mac_addr[i];
+ }
+ index *= ADD_ADDR_INCR;
+
+ writel(mac_addr_lo, hw->io + index + KS_ADD_ADDR_0_LO);
+ writel(mac_addr_hi, hw->io + index + KS_ADD_ADDR_0_HI);
+}
+
+static void hw_set_add_addr(struct ksz_hw *hw)
+{
+ int i;
+
+ for (i = 0; i < ADDITIONAL_ENTRIES; i++) {
+ if (empty_addr(hw->address[i]))
+ writel(0, hw->io + ADD_ADDR_INCR * i +
+ KS_ADD_ADDR_0_HI);
+ else
+ hw_ena_add_addr(hw, i, hw->address[i]);
+ }
+}
+
+static int hw_add_addr(struct ksz_hw *hw, u8 *mac_addr)
+{
+ int i;
+ int j = ADDITIONAL_ENTRIES;
+
+ if (ether_addr_equal(hw->override_addr, mac_addr))
+ return 0;
+ for (i = 0; i < hw->addr_list_size; i++) {
+ if (ether_addr_equal(hw->address[i], mac_addr))
+ return 0;
+ if (ADDITIONAL_ENTRIES == j && empty_addr(hw->address[i]))
+ j = i;
+ }
+ if (j < ADDITIONAL_ENTRIES) {
+ memcpy(hw->address[j], mac_addr, ETH_ALEN);
+ hw_ena_add_addr(hw, j, hw->address[j]);
+ return 0;
+ }
+ return -1;
+}
+
+static int hw_del_addr(struct ksz_hw *hw, u8 *mac_addr)
+{
+ int i;
+
+ for (i = 0; i < hw->addr_list_size; i++) {
+ if (ether_addr_equal(hw->address[i], mac_addr)) {
+ eth_zero_addr(hw->address[i]);
+ writel(0, hw->io + ADD_ADDR_INCR * i +
+ KS_ADD_ADDR_0_HI);
+ return 0;
+ }
+ }
+ return -1;
+}
+
+/**
+ * hw_clr_multicast - clear multicast addresses
+ * @hw: The hardware instance.
+ *
+ * This routine removes all multicast addresses set in the hardware.
+ */
+static void hw_clr_multicast(struct ksz_hw *hw)
+{
+ int i;
+
+ for (i = 0; i < HW_MULTICAST_SIZE; i++) {
+ hw->multi_bits[i] = 0;
+
+ writeb(0, hw->io + KS884X_MULTICAST_0_OFFSET + i);
+ }
+}
+
+/**
+ * hw_set_grp_addr - set multicast addresses
+ * @hw: The hardware instance.
+ *
+ * This routine programs multicast addresses for the hardware to accept those
+ * addresses.
+ */
+static void hw_set_grp_addr(struct ksz_hw *hw)
+{
+ int i;
+ int index;
+ int position;
+ int value;
+
+ memset(hw->multi_bits, 0, sizeof(u8) * HW_MULTICAST_SIZE);
+
+ for (i = 0; i < hw->multi_list_size; i++) {
+ position = (ether_crc(6, hw->multi_list[i]) >> 26) & 0x3f;
+ index = position >> 3;
+ value = 1 << (position & 7);
+ hw->multi_bits[index] |= (u8) value;
+ }
+
+ for (i = 0; i < HW_MULTICAST_SIZE; i++)
+ writeb(hw->multi_bits[i], hw->io + KS884X_MULTICAST_0_OFFSET +
+ i);
+}
+
+/**
+ * hw_set_multicast - enable or disable all multicast receiving
+ * @hw: The hardware instance.
+ * @multicast: To turn on or off the all multicast feature.
+ *
+ * This routine enables/disables the hardware to accept all multicast packets.
+ */
+static void hw_set_multicast(struct ksz_hw *hw, u8 multicast)
+{
+ /* Stop receiving for reconfiguration. */
+ hw_stop_rx(hw);
+
+ if (multicast)
+ hw->rx_cfg |= DMA_RX_ALL_MULTICAST;
+ else
+ hw->rx_cfg &= ~DMA_RX_ALL_MULTICAST;
+
+ if (hw->enabled)
+ hw_start_rx(hw);
+}
+
+/**
+ * hw_set_promiscuous - enable or disable promiscuous receiving
+ * @hw: The hardware instance.
+ * @prom: To turn on or off the promiscuous feature.
+ *
+ * This routine enables/disables the hardware to accept all packets.
+ */
+static void hw_set_promiscuous(struct ksz_hw *hw, u8 prom)
+{
+ /* Stop receiving for reconfiguration. */
+ hw_stop_rx(hw);
+
+ if (prom)
+ hw->rx_cfg |= DMA_RX_PROMISCUOUS;
+ else
+ hw->rx_cfg &= ~DMA_RX_PROMISCUOUS;
+
+ if (hw->enabled)
+ hw_start_rx(hw);
+}
+
+/**
+ * sw_enable - enable the switch
+ * @hw: The hardware instance.
+ * @enable: The flag to enable or disable the switch
+ *
+ * This routine is used to enable/disable the switch in KSZ8842.
+ */
+static void sw_enable(struct ksz_hw *hw, int enable)
+{
+ int port;
+
+ for (port = 0; port < SWITCH_PORT_NUM; port++) {
+ if (hw->dev_count > 1) {
+ /* Set port-base vlan membership with host port. */
+ sw_cfg_port_base_vlan(hw, port,
+ HOST_MASK | (1 << port));
+ port_set_stp_state(hw, port, STP_STATE_DISABLED);
+ } else {
+ sw_cfg_port_base_vlan(hw, port, PORT_MASK);
+ port_set_stp_state(hw, port, STP_STATE_FORWARDING);
+ }
+ }
+ if (hw->dev_count > 1)
+ port_set_stp_state(hw, SWITCH_PORT_NUM, STP_STATE_SIMPLE);
+ else
+ port_set_stp_state(hw, SWITCH_PORT_NUM, STP_STATE_FORWARDING);
+
+ if (enable)
+ enable = KS8842_START;
+ writew(enable, hw->io + KS884X_CHIP_ID_OFFSET);
+}
+
+/**
+ * sw_setup - setup the switch
+ * @hw: The hardware instance.
+ *
+ * This routine setup the hardware switch engine for default operation.
+ */
+static void sw_setup(struct ksz_hw *hw)
+{
+ int port;
+
+ sw_set_global_ctrl(hw);
+
+ /* Enable switch broadcast storm protection at 10% percent rate. */
+ sw_init_broad_storm(hw);
+ hw_cfg_broad_storm(hw, BROADCAST_STORM_PROTECTION_RATE);
+ for (port = 0; port < SWITCH_PORT_NUM; port++)
+ sw_ena_broad_storm(hw, port);
+
+ sw_init_prio(hw);
+
+ sw_init_mirror(hw);
+
+ sw_init_prio_rate(hw);
+
+ sw_init_vlan(hw);
+
+ if (hw->features & STP_SUPPORT)
+ sw_init_stp(hw);
+ if (!sw_chk(hw, KS8842_SWITCH_CTRL_1_OFFSET,
+ SWITCH_TX_FLOW_CTRL | SWITCH_RX_FLOW_CTRL))
+ hw->overrides |= PAUSE_FLOW_CTRL;
+ sw_enable(hw, 1);
+}
+
+/**
+ * ksz_start_timer - start kernel timer
+ * @info: Kernel timer information.
+ * @time: The time tick.
+ *
+ * This routine starts the kernel timer after the specified time tick.
+ */
+static void ksz_start_timer(struct ksz_timer_info *info, int time)
+{
+ info->cnt = 0;
+ info->timer.expires = jiffies + time;
+ add_timer(&info->timer);
+
+ /* infinity */
+ info->max = -1;
+}
+
+/**
+ * ksz_stop_timer - stop kernel timer
+ * @info: Kernel timer information.
+ *
+ * This routine stops the kernel timer.
+ */
+static void ksz_stop_timer(struct ksz_timer_info *info)
+{
+ if (info->max) {
+ info->max = 0;
+ del_timer_sync(&info->timer);
+ }
+}
+
+static void ksz_init_timer(struct ksz_timer_info *info, int period,
+ void (*function)(unsigned long), void *data)
+{
+ info->max = 0;
+ info->period = period;
+ setup_timer(&info->timer, function, (unsigned long)data);
+}
+
+static void ksz_update_timer(struct ksz_timer_info *info)
+{
+ ++info->cnt;
+ if (info->max > 0) {
+ if (info->cnt < info->max) {
+ info->timer.expires = jiffies + info->period;
+ add_timer(&info->timer);
+ } else
+ info->max = 0;
+ } else if (info->max < 0) {
+ info->timer.expires = jiffies + info->period;
+ add_timer(&info->timer);
+ }
+}
+
+/**
+ * ksz_alloc_soft_desc - allocate software descriptors
+ * @desc_info: Descriptor information structure.
+ * @transmit: Indication that descriptors are for transmit.
+ *
+ * This local function allocates software descriptors for manipulation in
+ * memory.
+ *
+ * Return 0 if successful.
+ */
+static int ksz_alloc_soft_desc(struct ksz_desc_info *desc_info, int transmit)
+{
+ desc_info->ring = kzalloc(sizeof(struct ksz_desc) * desc_info->alloc,
+ GFP_KERNEL);
+ if (!desc_info->ring)
+ return 1;
+ hw_init_desc(desc_info, transmit);
+ return 0;
+}
+
+/**
+ * ksz_alloc_desc - allocate hardware descriptors
+ * @adapter: Adapter information structure.
+ *
+ * This local function allocates hardware descriptors for receiving and
+ * transmitting.
+ *
+ * Return 0 if successful.
+ */
+static int ksz_alloc_desc(struct dev_info *adapter)
+{
+ struct ksz_hw *hw = &adapter->hw;
+ int offset;
+
+ /* Allocate memory for RX & TX descriptors. */
+ adapter->desc_pool.alloc_size =
+ hw->rx_desc_info.size * hw->rx_desc_info.alloc +
+ hw->tx_desc_info.size * hw->tx_desc_info.alloc +
+ DESC_ALIGNMENT;
+
+ adapter->desc_pool.alloc_virt =
+ pci_zalloc_consistent(adapter->pdev,
+ adapter->desc_pool.alloc_size,
+ &adapter->desc_pool.dma_addr);
+ if (adapter->desc_pool.alloc_virt == NULL) {
+ adapter->desc_pool.alloc_size = 0;
+ return 1;
+ }
+
+ /* Align to the next cache line boundary. */
+ offset = (((ulong) adapter->desc_pool.alloc_virt % DESC_ALIGNMENT) ?
+ (DESC_ALIGNMENT -
+ ((ulong) adapter->desc_pool.alloc_virt % DESC_ALIGNMENT)) : 0);
+ adapter->desc_pool.virt = adapter->desc_pool.alloc_virt + offset;
+ adapter->desc_pool.phys = adapter->desc_pool.dma_addr + offset;
+
+ /* Allocate receive/transmit descriptors. */
+ hw->rx_desc_info.ring_virt = (struct ksz_hw_desc *)
+ adapter->desc_pool.virt;
+ hw->rx_desc_info.ring_phys = adapter->desc_pool.phys;
+ offset = hw->rx_desc_info.alloc * hw->rx_desc_info.size;
+ hw->tx_desc_info.ring_virt = (struct ksz_hw_desc *)
+ (adapter->desc_pool.virt + offset);
+ hw->tx_desc_info.ring_phys = adapter->desc_pool.phys + offset;
+
+ if (ksz_alloc_soft_desc(&hw->rx_desc_info, 0))
+ return 1;
+ if (ksz_alloc_soft_desc(&hw->tx_desc_info, 1))
+ return 1;
+
+ return 0;
+}
+
+/**
+ * free_dma_buf - release DMA buffer resources
+ * @adapter: Adapter information structure.
+ *
+ * This routine is just a helper function to release the DMA buffer resources.
+ */
+static void free_dma_buf(struct dev_info *adapter, struct ksz_dma_buf *dma_buf,
+ int direction)
+{
+ pci_unmap_single(adapter->pdev, dma_buf->dma, dma_buf->len, direction);
+ dev_kfree_skb(dma_buf->skb);
+ dma_buf->skb = NULL;
+ dma_buf->dma = 0;
+}
+
+/**
+ * ksz_init_rx_buffers - initialize receive descriptors
+ * @adapter: Adapter information structure.
+ *
+ * This routine initializes DMA buffers for receiving.
+ */
+static void ksz_init_rx_buffers(struct dev_info *adapter)
+{
+ int i;
+ struct ksz_desc *desc;
+ struct ksz_dma_buf *dma_buf;
+ struct ksz_hw *hw = &adapter->hw;
+ struct ksz_desc_info *info = &hw->rx_desc_info;
+
+ for (i = 0; i < hw->rx_desc_info.alloc; i++) {
+ get_rx_pkt(info, &desc);
+
+ dma_buf = DMA_BUFFER(desc);
+ if (dma_buf->skb && dma_buf->len != adapter->mtu)
+ free_dma_buf(adapter, dma_buf, PCI_DMA_FROMDEVICE);
+ dma_buf->len = adapter->mtu;
+ if (!dma_buf->skb)
+ dma_buf->skb = alloc_skb(dma_buf->len, GFP_ATOMIC);
+ if (dma_buf->skb && !dma_buf->dma)
+ dma_buf->dma = pci_map_single(
+ adapter->pdev,
+ skb_tail_pointer(dma_buf->skb),
+ dma_buf->len,
+ PCI_DMA_FROMDEVICE);
+
+ /* Set descriptor. */
+ set_rx_buf(desc, dma_buf->dma);
+ set_rx_len(desc, dma_buf->len);
+ release_desc(desc);
+ }
+}
+
+/**
+ * ksz_alloc_mem - allocate memory for hardware descriptors
+ * @adapter: Adapter information structure.
+ *
+ * This function allocates memory for use by hardware descriptors for receiving
+ * and transmitting.
+ *
+ * Return 0 if successful.
+ */
+static int ksz_alloc_mem(struct dev_info *adapter)
+{
+ struct ksz_hw *hw = &adapter->hw;
+
+ /* Determine the number of receive and transmit descriptors. */
+ hw->rx_desc_info.alloc = NUM_OF_RX_DESC;
+ hw->tx_desc_info.alloc = NUM_OF_TX_DESC;
+
+ /* Determine how many descriptors to skip transmit interrupt. */
+ hw->tx_int_cnt = 0;
+ hw->tx_int_mask = NUM_OF_TX_DESC / 4;
+ if (hw->tx_int_mask > 8)
+ hw->tx_int_mask = 8;
+ while (hw->tx_int_mask) {
+ hw->tx_int_cnt++;
+ hw->tx_int_mask >>= 1;
+ }
+ if (hw->tx_int_cnt) {
+ hw->tx_int_mask = (1 << (hw->tx_int_cnt - 1)) - 1;
+ hw->tx_int_cnt = 0;
+ }
+
+ /* Determine the descriptor size. */
+ hw->rx_desc_info.size =
+ (((sizeof(struct ksz_hw_desc) + DESC_ALIGNMENT - 1) /
+ DESC_ALIGNMENT) * DESC_ALIGNMENT);
+ hw->tx_desc_info.size =
+ (((sizeof(struct ksz_hw_desc) + DESC_ALIGNMENT - 1) /
+ DESC_ALIGNMENT) * DESC_ALIGNMENT);
+ if (hw->rx_desc_info.size != sizeof(struct ksz_hw_desc))
+ pr_alert("Hardware descriptor size not right!\n");
+ ksz_check_desc_num(&hw->rx_desc_info);
+ ksz_check_desc_num(&hw->tx_desc_info);
+
+ /* Allocate descriptors. */
+ if (ksz_alloc_desc(adapter))
+ return 1;
+
+ return 0;
+}
+
+/**
+ * ksz_free_desc - free software and hardware descriptors
+ * @adapter: Adapter information structure.
+ *
+ * This local routine frees the software and hardware descriptors allocated by
+ * ksz_alloc_desc().
+ */
+static void ksz_free_desc(struct dev_info *adapter)
+{
+ struct ksz_hw *hw = &adapter->hw;
+
+ /* Reset descriptor. */
+ hw->rx_desc_info.ring_virt = NULL;
+ hw->tx_desc_info.ring_virt = NULL;
+ hw->rx_desc_info.ring_phys = 0;
+ hw->tx_desc_info.ring_phys = 0;
+
+ /* Free memory. */
+ if (adapter->desc_pool.alloc_virt)
+ pci_free_consistent(
+ adapter->pdev,
+ adapter->desc_pool.alloc_size,
+ adapter->desc_pool.alloc_virt,
+ adapter->desc_pool.dma_addr);
+
+ /* Reset resource pool. */
+ adapter->desc_pool.alloc_size = 0;
+ adapter->desc_pool.alloc_virt = NULL;
+
+ kfree(hw->rx_desc_info.ring);
+ hw->rx_desc_info.ring = NULL;
+ kfree(hw->tx_desc_info.ring);
+ hw->tx_desc_info.ring = NULL;
+}
+
+/**
+ * ksz_free_buffers - free buffers used in the descriptors
+ * @adapter: Adapter information structure.
+ * @desc_info: Descriptor information structure.
+ *
+ * This local routine frees buffers used in the DMA buffers.
+ */
+static void ksz_free_buffers(struct dev_info *adapter,
+ struct ksz_desc_info *desc_info, int direction)
+{
+ int i;
+ struct ksz_dma_buf *dma_buf;
+ struct ksz_desc *desc = desc_info->ring;
+
+ for (i = 0; i < desc_info->alloc; i++) {
+ dma_buf = DMA_BUFFER(desc);
+ if (dma_buf->skb)
+ free_dma_buf(adapter, dma_buf, direction);
+ desc++;
+ }
+}
+
+/**
+ * ksz_free_mem - free all resources used by descriptors
+ * @adapter: Adapter information structure.
+ *
+ * This local routine frees all the resources allocated by ksz_alloc_mem().
+ */
+static void ksz_free_mem(struct dev_info *adapter)
+{
+ /* Free transmit buffers. */
+ ksz_free_buffers(adapter, &adapter->hw.tx_desc_info,
+ PCI_DMA_TODEVICE);
+
+ /* Free receive buffers. */
+ ksz_free_buffers(adapter, &adapter->hw.rx_desc_info,
+ PCI_DMA_FROMDEVICE);
+
+ /* Free descriptors. */
+ ksz_free_desc(adapter);
+}
+
+static void get_mib_counters(struct ksz_hw *hw, int first, int cnt,
+ u64 *counter)
+{
+ int i;
+ int mib;
+ int port;
+ struct ksz_port_mib *port_mib;
+
+ memset(counter, 0, sizeof(u64) * TOTAL_PORT_COUNTER_NUM);
+ for (i = 0, port = first; i < cnt; i++, port++) {
+ port_mib = &hw->port_mib[port];
+ for (mib = port_mib->mib_start; mib < hw->mib_cnt; mib++)
+ counter[mib] += port_mib->counter[mib];
+ }
+}
+
+/**
+ * send_packet - send packet
+ * @skb: Socket buffer.
+ * @dev: Network device.
+ *
+ * This routine is used to send a packet out to the network.
+ */
+static void send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ksz_desc *desc;
+ struct ksz_desc *first;
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct ksz_desc_info *info = &hw->tx_desc_info;
+ struct ksz_dma_buf *dma_buf;
+ int len;
+ int last_frag = skb_shinfo(skb)->nr_frags;
+
+ /*
+ * KSZ8842 with multiple device interfaces needs to be told which port
+ * to send.
+ */
+ if (hw->dev_count > 1)
+ hw->dst_ports = 1 << priv->port.first_port;
+
+ /* Hardware will pad the length to 60. */
+ len = skb->len;
+
+ /* Remember the very first descriptor. */
+ first = info->cur;
+ desc = first;
+
+ dma_buf = DMA_BUFFER(desc);
+ if (last_frag) {
+ int frag;
+ skb_frag_t *this_frag;
+
+ dma_buf->len = skb_headlen(skb);
+
+ dma_buf->dma = pci_map_single(
+ hw_priv->pdev, skb->data, dma_buf->len,
+ PCI_DMA_TODEVICE);
+ set_tx_buf(desc, dma_buf->dma);
+ set_tx_len(desc, dma_buf->len);
+
+ frag = 0;
+ do {
+ this_frag = &skb_shinfo(skb)->frags[frag];
+
+ /* Get a new descriptor. */
+ get_tx_pkt(info, &desc);
+
+ /* Keep track of descriptors used so far. */
+ ++hw->tx_int_cnt;
+
+ dma_buf = DMA_BUFFER(desc);
+ dma_buf->len = skb_frag_size(this_frag);
+
+ dma_buf->dma = pci_map_single(
+ hw_priv->pdev,
+ skb_frag_address(this_frag),
+ dma_buf->len,
+ PCI_DMA_TODEVICE);
+ set_tx_buf(desc, dma_buf->dma);
+ set_tx_len(desc, dma_buf->len);
+
+ frag++;
+ if (frag == last_frag)
+ break;
+
+ /* Do not release the last descriptor here. */
+ release_desc(desc);
+ } while (1);
+
+ /* current points to the last descriptor. */
+ info->cur = desc;
+
+ /* Release the first descriptor. */
+ release_desc(first);
+ } else {
+ dma_buf->len = len;
+
+ dma_buf->dma = pci_map_single(
+ hw_priv->pdev, skb->data, dma_buf->len,
+ PCI_DMA_TODEVICE);
+ set_tx_buf(desc, dma_buf->dma);
+ set_tx_len(desc, dma_buf->len);
+ }
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ (desc)->sw.buf.tx.csum_gen_tcp = 1;
+ (desc)->sw.buf.tx.csum_gen_udp = 1;
+ }
+
+ /*
+ * The last descriptor holds the packet so that it can be returned to
+ * network subsystem after all descriptors are transmitted.
+ */
+ dma_buf->skb = skb;
+
+ hw_send_pkt(hw);
+
+ /* Update transmit statistics. */
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += len;
+}
+
+/**
+ * transmit_cleanup - clean up transmit descriptors
+ * @dev: Network device.
+ *
+ * This routine is called to clean up the transmitted buffers.
+ */
+static void transmit_cleanup(struct dev_info *hw_priv, int normal)
+{
+ int last;
+ union desc_stat status;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct ksz_desc_info *info = &hw->tx_desc_info;
+ struct ksz_desc *desc;
+ struct ksz_dma_buf *dma_buf;
+ struct net_device *dev = NULL;
+
+ spin_lock_irq(&hw_priv->hwlock);
+ last = info->last;
+
+ while (info->avail < info->alloc) {
+ /* Get next descriptor which is not hardware owned. */
+ desc = &info->ring[last];
+ status.data = le32_to_cpu(desc->phw->ctrl.data);
+ if (status.tx.hw_owned) {
+ if (normal)
+ break;
+ else
+ reset_desc(desc, status);
+ }
+
+ dma_buf = DMA_BUFFER(desc);
+ pci_unmap_single(
+ hw_priv->pdev, dma_buf->dma, dma_buf->len,
+ PCI_DMA_TODEVICE);
+
+ /* This descriptor contains the last buffer in the packet. */
+ if (dma_buf->skb) {
+ dev = dma_buf->skb->dev;
+
+ /* Release the packet back to network subsystem. */
+ dev_kfree_skb_irq(dma_buf->skb);
+ dma_buf->skb = NULL;
+ }
+
+ /* Free the transmitted descriptor. */
+ last++;
+ last &= info->mask;
+ info->avail++;
+ }
+ info->last = last;
+ spin_unlock_irq(&hw_priv->hwlock);
+
+ /* Notify the network subsystem that the packet has been sent. */
+ if (dev)
+ dev->trans_start = jiffies;
+}
+
+/**
+ * transmit_done - transmit done processing
+ * @dev: Network device.
+ *
+ * This routine is called when the transmit interrupt is triggered, indicating
+ * either a packet is sent successfully or there are transmit errors.
+ */
+static void tx_done(struct dev_info *hw_priv)
+{
+ struct ksz_hw *hw = &hw_priv->hw;
+ int port;
+
+ transmit_cleanup(hw_priv, 1);
+
+ for (port = 0; port < hw->dev_count; port++) {
+ struct net_device *dev = hw->port_info[port].pdev;
+
+ if (netif_running(dev) && netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+ }
+}
+
+static inline void copy_old_skb(struct sk_buff *old, struct sk_buff *skb)
+{
+ skb->dev = old->dev;
+ skb->protocol = old->protocol;
+ skb->ip_summed = old->ip_summed;
+ skb->csum = old->csum;
+ skb_set_network_header(skb, ETH_HLEN);
+
+ dev_consume_skb_any(old);
+}
+
+/**
+ * netdev_tx - send out packet
+ * @skb: Socket buffer.
+ * @dev: Network device.
+ *
+ * This function is used by the upper network layer to send out a packet.
+ *
+ * Return 0 if successful; otherwise an error code indicating failure.
+ */
+static netdev_tx_t netdev_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ int left;
+ int num = 1;
+ int rc = 0;
+
+ if (hw->features & SMALL_PACKET_TX_BUG) {
+ struct sk_buff *org_skb = skb;
+
+ if (skb->len <= 48) {
+ if (skb_end_pointer(skb) - skb->data >= 50) {
+ memset(&skb->data[skb->len], 0, 50 - skb->len);
+ skb->len = 50;
+ } else {
+ skb = netdev_alloc_skb(dev, 50);
+ if (!skb)
+ return NETDEV_TX_BUSY;
+ memcpy(skb->data, org_skb->data, org_skb->len);
+ memset(&skb->data[org_skb->len], 0,
+ 50 - org_skb->len);
+ skb->len = 50;
+ copy_old_skb(org_skb, skb);
+ }
+ }
+ }
+
+ spin_lock_irq(&hw_priv->hwlock);
+
+ num = skb_shinfo(skb)->nr_frags + 1;
+ left = hw_alloc_pkt(hw, skb->len, num);
+ if (left) {
+ if (left < num ||
+ (CHECKSUM_PARTIAL == skb->ip_summed &&
+ skb->protocol == htons(ETH_P_IPV6))) {
+ struct sk_buff *org_skb = skb;
+
+ skb = netdev_alloc_skb(dev, org_skb->len);
+ if (!skb) {
+ rc = NETDEV_TX_BUSY;
+ goto unlock;
+ }
+ skb_copy_and_csum_dev(org_skb, skb->data);
+ org_skb->ip_summed = CHECKSUM_NONE;
+ skb->len = org_skb->len;
+ copy_old_skb(org_skb, skb);
+ }
+ send_packet(skb, dev);
+ if (left <= num)
+ netif_stop_queue(dev);
+ } else {
+ /* Stop the transmit queue until packet is allocated. */
+ netif_stop_queue(dev);
+ rc = NETDEV_TX_BUSY;
+ }
+unlock:
+ spin_unlock_irq(&hw_priv->hwlock);
+
+ return rc;
+}
+
+/**
+ * netdev_tx_timeout - transmit timeout processing
+ * @dev: Network device.
+ *
+ * This routine is called when the transmit timer expires. That indicates the
+ * hardware is not running correctly because transmit interrupts are not
+ * triggered to free up resources so that the transmit routine can continue
+ * sending out packets. The hardware is reset to correct the problem.
+ */
+static void netdev_tx_timeout(struct net_device *dev)
+{
+ static unsigned long last_reset;
+
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ int port;
+
+ if (hw->dev_count > 1) {
+ /*
+ * Only reset the hardware if time between calls is long
+ * enough.
+ */
+ if (time_before_eq(jiffies, last_reset + dev->watchdog_timeo))
+ hw_priv = NULL;
+ }
+
+ last_reset = jiffies;
+ if (hw_priv) {
+ hw_dis_intr(hw);
+ hw_disable(hw);
+
+ transmit_cleanup(hw_priv, 0);
+ hw_reset_pkts(&hw->rx_desc_info);
+ hw_reset_pkts(&hw->tx_desc_info);
+ ksz_init_rx_buffers(hw_priv);
+
+ hw_reset(hw);
+
+ hw_set_desc_base(hw,
+ hw->tx_desc_info.ring_phys,
+ hw->rx_desc_info.ring_phys);
+ hw_set_addr(hw);
+ if (hw->all_multi)
+ hw_set_multicast(hw, hw->all_multi);
+ else if (hw->multi_list_size)
+ hw_set_grp_addr(hw);
+
+ if (hw->dev_count > 1) {
+ hw_set_add_addr(hw);
+ for (port = 0; port < SWITCH_PORT_NUM; port++) {
+ struct net_device *port_dev;
+
+ port_set_stp_state(hw, port,
+ STP_STATE_DISABLED);
+
+ port_dev = hw->port_info[port].pdev;
+ if (netif_running(port_dev))
+ port_set_stp_state(hw, port,
+ STP_STATE_SIMPLE);
+ }
+ }
+
+ hw_enable(hw);
+ hw_ena_intr(hw);
+ }
+
+ dev->trans_start = jiffies;
+ netif_wake_queue(dev);
+}
+
+static inline void csum_verified(struct sk_buff *skb)
+{
+ unsigned short protocol;
+ struct iphdr *iph;
+
+ protocol = skb->protocol;
+ skb_reset_network_header(skb);
+ iph = (struct iphdr *) skb_network_header(skb);
+ if (protocol == htons(ETH_P_8021Q)) {
+ protocol = iph->tot_len;
+ skb_set_network_header(skb, VLAN_HLEN);
+ iph = (struct iphdr *) skb_network_header(skb);
+ }
+ if (protocol == htons(ETH_P_IP)) {
+ if (iph->protocol == IPPROTO_TCP)
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ }
+}
+
+static inline int rx_proc(struct net_device *dev, struct ksz_hw* hw,
+ struct ksz_desc *desc, union desc_stat status)
+{
+ int packet_len;
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_dma_buf *dma_buf;
+ struct sk_buff *skb;
+ int rx_status;
+
+ /* Received length includes 4-byte CRC. */
+ packet_len = status.rx.frame_len - 4;
+
+ dma_buf = DMA_BUFFER(desc);
+ pci_dma_sync_single_for_cpu(
+ hw_priv->pdev, dma_buf->dma, packet_len + 4,
+ PCI_DMA_FROMDEVICE);
+
+ do {
+ /* skb->data != skb->head */
+ skb = netdev_alloc_skb(dev, packet_len + 2);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return -ENOMEM;
+ }
+
+ /*
+ * Align socket buffer in 4-byte boundary for better
+ * performance.
+ */
+ skb_reserve(skb, 2);
+
+ memcpy(skb_put(skb, packet_len),
+ dma_buf->skb->data, packet_len);
+ } while (0);
+
+ skb->protocol = eth_type_trans(skb, dev);
+
+ if (hw->rx_cfg & (DMA_RX_CSUM_UDP | DMA_RX_CSUM_TCP))
+ csum_verified(skb);
+
+ /* Update receive statistics. */
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += packet_len;
+
+ /* Notify upper layer for received packet. */
+ rx_status = netif_rx(skb);
+
+ return 0;
+}
+
+static int dev_rcv_packets(struct dev_info *hw_priv)
+{
+ int next;
+ union desc_stat status;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct net_device *dev = hw->port_info[0].pdev;
+ struct ksz_desc_info *info = &hw->rx_desc_info;
+ int left = info->alloc;
+ struct ksz_desc *desc;
+ int received = 0;
+
+ next = info->next;
+ while (left--) {
+ /* Get next descriptor which is not hardware owned. */
+ desc = &info->ring[next];
+ status.data = le32_to_cpu(desc->phw->ctrl.data);
+ if (status.rx.hw_owned)
+ break;
+
+ /* Status valid only when last descriptor bit is set. */
+ if (status.rx.last_desc && status.rx.first_desc) {
+ if (rx_proc(dev, hw, desc, status))
+ goto release_packet;
+ received++;
+ }
+
+release_packet:
+ release_desc(desc);
+ next++;
+ next &= info->mask;
+ }
+ info->next = next;
+
+ return received;
+}
+
+static int port_rcv_packets(struct dev_info *hw_priv)
+{
+ int next;
+ union desc_stat status;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct net_device *dev = hw->port_info[0].pdev;
+ struct ksz_desc_info *info = &hw->rx_desc_info;
+ int left = info->alloc;
+ struct ksz_desc *desc;
+ int received = 0;
+
+ next = info->next;
+ while (left--) {
+ /* Get next descriptor which is not hardware owned. */
+ desc = &info->ring[next];
+ status.data = le32_to_cpu(desc->phw->ctrl.data);
+ if (status.rx.hw_owned)
+ break;
+
+ if (hw->dev_count > 1) {
+ /* Get received port number. */
+ int p = HW_TO_DEV_PORT(status.rx.src_port);
+
+ dev = hw->port_info[p].pdev;
+ if (!netif_running(dev))
+ goto release_packet;
+ }
+
+ /* Status valid only when last descriptor bit is set. */
+ if (status.rx.last_desc && status.rx.first_desc) {
+ if (rx_proc(dev, hw, desc, status))
+ goto release_packet;
+ received++;
+ }
+
+release_packet:
+ release_desc(desc);
+ next++;
+ next &= info->mask;
+ }
+ info->next = next;
+
+ return received;
+}
+
+static int dev_rcv_special(struct dev_info *hw_priv)
+{
+ int next;
+ union desc_stat status;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct net_device *dev = hw->port_info[0].pdev;
+ struct ksz_desc_info *info = &hw->rx_desc_info;
+ int left = info->alloc;
+ struct ksz_desc *desc;
+ int received = 0;
+
+ next = info->next;
+ while (left--) {
+ /* Get next descriptor which is not hardware owned. */
+ desc = &info->ring[next];
+ status.data = le32_to_cpu(desc->phw->ctrl.data);
+ if (status.rx.hw_owned)
+ break;
+
+ if (hw->dev_count > 1) {
+ /* Get received port number. */
+ int p = HW_TO_DEV_PORT(status.rx.src_port);
+
+ dev = hw->port_info[p].pdev;
+ if (!netif_running(dev))
+ goto release_packet;
+ }
+
+ /* Status valid only when last descriptor bit is set. */
+ if (status.rx.last_desc && status.rx.first_desc) {
+ /*
+ * Receive without error. With receive errors
+ * disabled, packets with receive errors will be
+ * dropped, so no need to check the error bit.
+ */
+ if (!status.rx.error || (status.data &
+ KS_DESC_RX_ERROR_COND) ==
+ KS_DESC_RX_ERROR_TOO_LONG) {
+ if (rx_proc(dev, hw, desc, status))
+ goto release_packet;
+ received++;
+ } else {
+ struct dev_priv *priv = netdev_priv(dev);
+
+ /* Update receive error statistics. */
+ priv->port.counter[OID_COUNTER_RCV_ERROR]++;
+ }
+ }
+
+release_packet:
+ release_desc(desc);
+ next++;
+ next &= info->mask;
+ }
+ info->next = next;
+
+ return received;
+}
+
+static void rx_proc_task(unsigned long data)
+{
+ struct dev_info *hw_priv = (struct dev_info *) data;
+ struct ksz_hw *hw = &hw_priv->hw;
+
+ if (!hw->enabled)
+ return;
+ if (unlikely(!hw_priv->dev_rcv(hw_priv))) {
+
+ /* In case receive process is suspended because of overrun. */
+ hw_resume_rx(hw);
+
+ /* tasklets are interruptible. */
+ spin_lock_irq(&hw_priv->hwlock);
+ hw_turn_on_intr(hw, KS884X_INT_RX_MASK);
+ spin_unlock_irq(&hw_priv->hwlock);
+ } else {
+ hw_ack_intr(hw, KS884X_INT_RX);
+ tasklet_schedule(&hw_priv->rx_tasklet);
+ }
+}
+
+static void tx_proc_task(unsigned long data)
+{
+ struct dev_info *hw_priv = (struct dev_info *) data;
+ struct ksz_hw *hw = &hw_priv->hw;
+
+ hw_ack_intr(hw, KS884X_INT_TX_MASK);
+
+ tx_done(hw_priv);
+
+ /* tasklets are interruptible. */
+ spin_lock_irq(&hw_priv->hwlock);
+ hw_turn_on_intr(hw, KS884X_INT_TX);
+ spin_unlock_irq(&hw_priv->hwlock);
+}
+
+static inline void handle_rx_stop(struct ksz_hw *hw)
+{
+ /* Receive just has been stopped. */
+ if (0 == hw->rx_stop)
+ hw->intr_mask &= ~KS884X_INT_RX_STOPPED;
+ else if (hw->rx_stop > 1) {
+ if (hw->enabled && (hw->rx_cfg & DMA_RX_ENABLE)) {
+ hw_start_rx(hw);
+ } else {
+ hw->intr_mask &= ~KS884X_INT_RX_STOPPED;
+ hw->rx_stop = 0;
+ }
+ } else
+ /* Receive just has been started. */
+ hw->rx_stop++;
+}
+
+/**
+ * netdev_intr - interrupt handling
+ * @irq: Interrupt number.
+ * @dev_id: Network device.
+ *
+ * This function is called by upper network layer to signal interrupt.
+ *
+ * Return IRQ_HANDLED if interrupt is handled.
+ */
+static irqreturn_t netdev_intr(int irq, void *dev_id)
+{
+ uint int_enable = 0;
+ struct net_device *dev = (struct net_device *) dev_id;
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+
+ spin_lock(&hw_priv->hwlock);
+
+ hw_read_intr(hw, &int_enable);
+
+ /* Not our interrupt! */
+ if (!int_enable) {
+ spin_unlock(&hw_priv->hwlock);
+ return IRQ_NONE;
+ }
+
+ do {
+ hw_ack_intr(hw, int_enable);
+ int_enable &= hw->intr_mask;
+
+ if (unlikely(int_enable & KS884X_INT_TX_MASK)) {
+ hw_dis_intr_bit(hw, KS884X_INT_TX_MASK);
+ tasklet_schedule(&hw_priv->tx_tasklet);
+ }
+
+ if (likely(int_enable & KS884X_INT_RX)) {
+ hw_dis_intr_bit(hw, KS884X_INT_RX);
+ tasklet_schedule(&hw_priv->rx_tasklet);
+ }
+
+ if (unlikely(int_enable & KS884X_INT_RX_OVERRUN)) {
+ dev->stats.rx_fifo_errors++;
+ hw_resume_rx(hw);
+ }
+
+ if (unlikely(int_enable & KS884X_INT_PHY)) {
+ struct ksz_port *port = &priv->port;
+
+ hw->features |= LINK_INT_WORKING;
+ port_get_link_speed(port);
+ }
+
+ if (unlikely(int_enable & KS884X_INT_RX_STOPPED)) {
+ handle_rx_stop(hw);
+ break;
+ }
+
+ if (unlikely(int_enable & KS884X_INT_TX_STOPPED)) {
+ u32 data;
+
+ hw->intr_mask &= ~KS884X_INT_TX_STOPPED;
+ pr_info("Tx stopped\n");
+ data = readl(hw->io + KS_DMA_TX_CTRL);
+ if (!(data & DMA_TX_ENABLE))
+ pr_info("Tx disabled\n");
+ break;
+ }
+ } while (0);
+
+ hw_ena_intr(hw);
+
+ spin_unlock(&hw_priv->hwlock);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Linux network device functions
+ */
+
+static unsigned long next_jiffies;
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void netdev_netpoll(struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+
+ hw_dis_intr(&hw_priv->hw);
+ netdev_intr(dev->irq, dev);
+}
+#endif
+
+static void bridge_change(struct ksz_hw *hw)
+{
+ int port;
+ u8 member;
+ struct ksz_switch *sw = hw->ksz_switch;
+
+ /* No ports in forwarding state. */
+ if (!sw->member) {
+ port_set_stp_state(hw, SWITCH_PORT_NUM, STP_STATE_SIMPLE);
+ sw_block_addr(hw);
+ }
+ for (port = 0; port < SWITCH_PORT_NUM; port++) {
+ if (STP_STATE_FORWARDING == sw->port_cfg[port].stp_state)
+ member = HOST_MASK | sw->member;
+ else
+ member = HOST_MASK | (1 << port);
+ if (member != sw->port_cfg[port].member)
+ sw_cfg_port_base_vlan(hw, port, member);
+ }
+}
+
+/**
+ * netdev_close - close network device
+ * @dev: Network device.
+ *
+ * This function process the close operation of network device. This is caused
+ * by the user command "ifconfig ethX down."
+ *
+ * Return 0 if successful; otherwise an error code indicating failure.
+ */
+static int netdev_close(struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_port *port = &priv->port;
+ struct ksz_hw *hw = &hw_priv->hw;
+ int pi;
+
+ netif_stop_queue(dev);
+
+ ksz_stop_timer(&priv->monitor_timer_info);
+
+ /* Need to shut the port manually in multiple device interfaces mode. */
+ if (hw->dev_count > 1) {
+ port_set_stp_state(hw, port->first_port, STP_STATE_DISABLED);
+
+ /* Port is closed. Need to change bridge setting. */
+ if (hw->features & STP_SUPPORT) {
+ pi = 1 << port->first_port;
+ if (hw->ksz_switch->member & pi) {
+ hw->ksz_switch->member &= ~pi;
+ bridge_change(hw);
+ }
+ }
+ }
+ if (port->first_port > 0)
+ hw_del_addr(hw, dev->dev_addr);
+ if (!hw_priv->wol_enable)
+ port_set_power_saving(port, true);
+
+ if (priv->multicast)
+ --hw->all_multi;
+ if (priv->promiscuous)
+ --hw->promiscuous;
+
+ hw_priv->opened--;
+ if (!(hw_priv->opened)) {
+ ksz_stop_timer(&hw_priv->mib_timer_info);
+ flush_work(&hw_priv->mib_read);
+
+ hw_dis_intr(hw);
+ hw_disable(hw);
+ hw_clr_multicast(hw);
+
+ /* Delay for receive task to stop scheduling itself. */
+ msleep(2000 / HZ);
+
+ tasklet_kill(&hw_priv->rx_tasklet);
+ tasklet_kill(&hw_priv->tx_tasklet);
+ free_irq(dev->irq, hw_priv->dev);
+
+ transmit_cleanup(hw_priv, 0);
+ hw_reset_pkts(&hw->rx_desc_info);
+ hw_reset_pkts(&hw->tx_desc_info);
+
+ /* Clean out static MAC table when the switch is shutdown. */
+ if (hw->features & STP_SUPPORT)
+ sw_clr_sta_mac_table(hw);
+ }
+
+ return 0;
+}
+
+static void hw_cfg_huge_frame(struct dev_info *hw_priv, struct ksz_hw *hw)
+{
+ if (hw->ksz_switch) {
+ u32 data;
+
+ data = readw(hw->io + KS8842_SWITCH_CTRL_2_OFFSET);
+ if (hw->features & RX_HUGE_FRAME)
+ data |= SWITCH_HUGE_PACKET;
+ else
+ data &= ~SWITCH_HUGE_PACKET;
+ writew(data, hw->io + KS8842_SWITCH_CTRL_2_OFFSET);
+ }
+ if (hw->features & RX_HUGE_FRAME) {
+ hw->rx_cfg |= DMA_RX_ERROR;
+ hw_priv->dev_rcv = dev_rcv_special;
+ } else {
+ hw->rx_cfg &= ~DMA_RX_ERROR;
+ if (hw->dev_count > 1)
+ hw_priv->dev_rcv = port_rcv_packets;
+ else
+ hw_priv->dev_rcv = dev_rcv_packets;
+ }
+}
+
+static int prepare_hardware(struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ int rc = 0;
+
+ /* Remember the network device that requests interrupts. */
+ hw_priv->dev = dev;
+ rc = request_irq(dev->irq, netdev_intr, IRQF_SHARED, dev->name, dev);
+ if (rc)
+ return rc;
+ tasklet_init(&hw_priv->rx_tasklet, rx_proc_task,
+ (unsigned long) hw_priv);
+ tasklet_init(&hw_priv->tx_tasklet, tx_proc_task,
+ (unsigned long) hw_priv);
+
+ hw->promiscuous = 0;
+ hw->all_multi = 0;
+ hw->multi_list_size = 0;
+
+ hw_reset(hw);
+
+ hw_set_desc_base(hw,
+ hw->tx_desc_info.ring_phys, hw->rx_desc_info.ring_phys);
+ hw_set_addr(hw);
+ hw_cfg_huge_frame(hw_priv, hw);
+ ksz_init_rx_buffers(hw_priv);
+ return 0;
+}
+
+static void set_media_state(struct net_device *dev, int media_state)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+
+ if (media_state == priv->media_state)
+ netif_carrier_on(dev);
+ else
+ netif_carrier_off(dev);
+ netif_info(priv, link, dev, "link %s\n",
+ media_state == priv->media_state ? "on" : "off");
+}
+
+/**
+ * netdev_open - open network device
+ * @dev: Network device.
+ *
+ * This function process the open operation of network device. This is caused
+ * by the user command "ifconfig ethX up."
+ *
+ * Return 0 if successful; otherwise an error code indicating failure.
+ */
+static int netdev_open(struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct ksz_port *port = &priv->port;
+ int i;
+ int p;
+ int rc = 0;
+
+ priv->multicast = 0;
+ priv->promiscuous = 0;
+
+ /* Reset device statistics. */
+ memset(&dev->stats, 0, sizeof(struct net_device_stats));
+ memset((void *) port->counter, 0,
+ (sizeof(u64) * OID_COUNTER_LAST));
+
+ if (!(hw_priv->opened)) {
+ rc = prepare_hardware(dev);
+ if (rc)
+ return rc;
+ for (i = 0; i < hw->mib_port_cnt; i++) {
+ if (next_jiffies < jiffies)
+ next_jiffies = jiffies + HZ * 2;
+ else
+ next_jiffies += HZ * 1;
+ hw_priv->counter[i].time = next_jiffies;
+ hw->port_mib[i].state = media_disconnected;
+ port_init_cnt(hw, i);
+ }
+ if (hw->ksz_switch)
+ hw->port_mib[HOST_PORT].state = media_connected;
+ else {
+ hw_add_wol_bcast(hw);
+ hw_cfg_wol_pme(hw, 0);
+ hw_clr_wol_pme_status(&hw_priv->hw);
+ }
+ }
+ port_set_power_saving(port, false);
+
+ for (i = 0, p = port->first_port; i < port->port_cnt; i++, p++) {
+ /*
+ * Initialize to invalid value so that link detection
+ * is done.
+ */
+ hw->port_info[p].partner = 0xFF;
+ hw->port_info[p].state = media_disconnected;
+ }
+
+ /* Need to open the port in multiple device interfaces mode. */
+ if (hw->dev_count > 1) {
+ port_set_stp_state(hw, port->first_port, STP_STATE_SIMPLE);
+ if (port->first_port > 0)
+ hw_add_addr(hw, dev->dev_addr);
+ }
+
+ port_get_link_speed(port);
+ if (port->force_link)
+ port_force_link_speed(port);
+ else
+ port_set_link_speed(port);
+
+ if (!(hw_priv->opened)) {
+ hw_setup_intr(hw);
+ hw_enable(hw);
+ hw_ena_intr(hw);
+
+ if (hw->mib_port_cnt)
+ ksz_start_timer(&hw_priv->mib_timer_info,
+ hw_priv->mib_timer_info.period);
+ }
+
+ hw_priv->opened++;
+
+ ksz_start_timer(&priv->monitor_timer_info,
+ priv->monitor_timer_info.period);
+
+ priv->media_state = port->linked->state;
+
+ set_media_state(dev, media_connected);
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+/* RX errors = rx_errors */
+/* RX dropped = rx_dropped */
+/* RX overruns = rx_fifo_errors */
+/* RX frame = rx_crc_errors + rx_frame_errors + rx_length_errors */
+/* TX errors = tx_errors */
+/* TX dropped = tx_dropped */
+/* TX overruns = tx_fifo_errors */
+/* TX carrier = tx_aborted_errors + tx_carrier_errors + tx_window_errors */
+/* collisions = collisions */
+
+/**
+ * netdev_query_statistics - query network device statistics
+ * @dev: Network device.
+ *
+ * This function returns the statistics of the network device. The device
+ * needs not be opened.
+ *
+ * Return network device statistics.
+ */
+static struct net_device_stats *netdev_query_statistics(struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct ksz_port *port = &priv->port;
+ struct ksz_hw *hw = &priv->adapter->hw;
+ struct ksz_port_mib *mib;
+ int i;
+ int p;
+
+ dev->stats.rx_errors = port->counter[OID_COUNTER_RCV_ERROR];
+ dev->stats.tx_errors = port->counter[OID_COUNTER_XMIT_ERROR];
+
+ /* Reset to zero to add count later. */
+ dev->stats.multicast = 0;
+ dev->stats.collisions = 0;
+ dev->stats.rx_length_errors = 0;
+ dev->stats.rx_crc_errors = 0;
+ dev->stats.rx_frame_errors = 0;
+ dev->stats.tx_window_errors = 0;
+
+ for (i = 0, p = port->first_port; i < port->mib_port_cnt; i++, p++) {
+ mib = &hw->port_mib[p];
+
+ dev->stats.multicast += (unsigned long)
+ mib->counter[MIB_COUNTER_RX_MULTICAST];
+
+ dev->stats.collisions += (unsigned long)
+ mib->counter[MIB_COUNTER_TX_TOTAL_COLLISION];
+
+ dev->stats.rx_length_errors += (unsigned long)(
+ mib->counter[MIB_COUNTER_RX_UNDERSIZE] +
+ mib->counter[MIB_COUNTER_RX_FRAGMENT] +
+ mib->counter[MIB_COUNTER_RX_OVERSIZE] +
+ mib->counter[MIB_COUNTER_RX_JABBER]);
+ dev->stats.rx_crc_errors += (unsigned long)
+ mib->counter[MIB_COUNTER_RX_CRC_ERR];
+ dev->stats.rx_frame_errors += (unsigned long)(
+ mib->counter[MIB_COUNTER_RX_ALIGNMENT_ERR] +
+ mib->counter[MIB_COUNTER_RX_SYMBOL_ERR]);
+
+ dev->stats.tx_window_errors += (unsigned long)
+ mib->counter[MIB_COUNTER_TX_LATE_COLLISION];
+ }
+
+ return &dev->stats;
+}
+
+/**
+ * netdev_set_mac_address - set network device MAC address
+ * @dev: Network device.
+ * @addr: Buffer of MAC address.
+ *
+ * This function is used to set the MAC address of the network device.
+ *
+ * Return 0 to indicate success.
+ */
+static int netdev_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct sockaddr *mac = addr;
+ uint interrupt;
+
+ if (priv->port.first_port > 0)
+ hw_del_addr(hw, dev->dev_addr);
+ else {
+ hw->mac_override = 1;
+ memcpy(hw->override_addr, mac->sa_data, ETH_ALEN);
+ }
+
+ memcpy(dev->dev_addr, mac->sa_data, ETH_ALEN);
+
+ interrupt = hw_block_intr(hw);
+
+ if (priv->port.first_port > 0)
+ hw_add_addr(hw, dev->dev_addr);
+ else
+ hw_set_addr(hw);
+ hw_restore_intr(hw, interrupt);
+
+ return 0;
+}
+
+static void dev_set_promiscuous(struct net_device *dev, struct dev_priv *priv,
+ struct ksz_hw *hw, int promiscuous)
+{
+ if (promiscuous != priv->promiscuous) {
+ u8 prev_state = hw->promiscuous;
+
+ if (promiscuous)
+ ++hw->promiscuous;
+ else
+ --hw->promiscuous;
+ priv->promiscuous = promiscuous;
+
+ /* Turn on/off promiscuous mode. */
+ if (hw->promiscuous <= 1 && prev_state <= 1)
+ hw_set_promiscuous(hw, hw->promiscuous);
+
+ /*
+ * Port is not in promiscuous mode, meaning it is released
+ * from the bridge.
+ */
+ if ((hw->features & STP_SUPPORT) && !promiscuous &&
+ (dev->priv_flags & IFF_BRIDGE_PORT)) {
+ struct ksz_switch *sw = hw->ksz_switch;
+ int port = priv->port.first_port;
+
+ port_set_stp_state(hw, port, STP_STATE_DISABLED);
+ port = 1 << port;
+ if (sw->member & port) {
+ sw->member &= ~port;
+ bridge_change(hw);
+ }
+ }
+ }
+}
+
+static void dev_set_multicast(struct dev_priv *priv, struct ksz_hw *hw,
+ int multicast)
+{
+ if (multicast != priv->multicast) {
+ u8 all_multi = hw->all_multi;
+
+ if (multicast)
+ ++hw->all_multi;
+ else
+ --hw->all_multi;
+ priv->multicast = multicast;
+
+ /* Turn on/off all multicast mode. */
+ if (hw->all_multi <= 1 && all_multi <= 1)
+ hw_set_multicast(hw, hw->all_multi);
+ }
+}
+
+/**
+ * netdev_set_rx_mode
+ * @dev: Network device.
+ *
+ * This routine is used to set multicast addresses or put the network device
+ * into promiscuous mode.
+ */
+static void netdev_set_rx_mode(struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct netdev_hw_addr *ha;
+ int multicast = (dev->flags & IFF_ALLMULTI);
+
+ dev_set_promiscuous(dev, priv, hw, (dev->flags & IFF_PROMISC));
+
+ if (hw_priv->hw.dev_count > 1)
+ multicast |= (dev->flags & IFF_MULTICAST);
+ dev_set_multicast(priv, hw, multicast);
+
+ /* Cannot use different hashes in multiple device interfaces mode. */
+ if (hw_priv->hw.dev_count > 1)
+ return;
+
+ if ((dev->flags & IFF_MULTICAST) && !netdev_mc_empty(dev)) {
+ int i = 0;
+
+ /* List too big to support so turn on all multicast mode. */
+ if (netdev_mc_count(dev) > MAX_MULTICAST_LIST) {
+ if (MAX_MULTICAST_LIST != hw->multi_list_size) {
+ hw->multi_list_size = MAX_MULTICAST_LIST;
+ ++hw->all_multi;
+ hw_set_multicast(hw, hw->all_multi);
+ }
+ return;
+ }
+
+ netdev_for_each_mc_addr(ha, dev) {
+ if (i >= MAX_MULTICAST_LIST)
+ break;
+ memcpy(hw->multi_list[i++], ha->addr, ETH_ALEN);
+ }
+ hw->multi_list_size = (u8) i;
+ hw_set_grp_addr(hw);
+ } else {
+ if (MAX_MULTICAST_LIST == hw->multi_list_size) {
+ --hw->all_multi;
+ hw_set_multicast(hw, hw->all_multi);
+ }
+ hw->multi_list_size = 0;
+ hw_clr_multicast(hw);
+ }
+}
+
+static int netdev_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ int hw_mtu;
+
+ if (netif_running(dev))
+ return -EBUSY;
+
+ /* Cannot use different MTU in multiple device interfaces mode. */
+ if (hw->dev_count > 1)
+ if (dev != hw_priv->dev)
+ return 0;
+ if (new_mtu < 60)
+ return -EINVAL;
+
+ if (dev->mtu != new_mtu) {
+ hw_mtu = new_mtu + ETHERNET_HEADER_SIZE + 4;
+ if (hw_mtu > MAX_RX_BUF_SIZE)
+ return -EINVAL;
+ if (hw_mtu > REGULAR_RX_BUF_SIZE) {
+ hw->features |= RX_HUGE_FRAME;
+ hw_mtu = MAX_RX_BUF_SIZE;
+ } else {
+ hw->features &= ~RX_HUGE_FRAME;
+ hw_mtu = REGULAR_RX_BUF_SIZE;
+ }
+ hw_mtu = (hw_mtu + 3) & ~3;
+ hw_priv->mtu = hw_mtu;
+ dev->mtu = new_mtu;
+ }
+ return 0;
+}
+
+/**
+ * netdev_ioctl - I/O control processing
+ * @dev: Network device.
+ * @ifr: Interface request structure.
+ * @cmd: I/O control code.
+ *
+ * This function is used to process I/O control calls.
+ *
+ * Return 0 to indicate success.
+ */
+static int netdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct ksz_port *port = &priv->port;
+ int result = 0;
+ struct mii_ioctl_data *data = if_mii(ifr);
+
+ if (down_interruptible(&priv->proc_sem))
+ return -ERESTARTSYS;
+
+ switch (cmd) {
+ /* Get address of MII PHY in use. */
+ case SIOCGMIIPHY:
+ data->phy_id = priv->id;
+
+ /* Fallthrough... */
+
+ /* Read MII PHY register. */
+ case SIOCGMIIREG:
+ if (data->phy_id != priv->id || data->reg_num >= 6)
+ result = -EIO;
+ else
+ hw_r_phy(hw, port->linked->port_id, data->reg_num,
+ &data->val_out);
+ break;
+
+ /* Write MII PHY register. */
+ case SIOCSMIIREG:
+ if (!capable(CAP_NET_ADMIN))
+ result = -EPERM;
+ else if (data->phy_id != priv->id || data->reg_num >= 6)
+ result = -EIO;
+ else
+ hw_w_phy(hw, port->linked->port_id, data->reg_num,
+ data->val_in);
+ break;
+
+ default:
+ result = -EOPNOTSUPP;
+ }
+
+ up(&priv->proc_sem);
+
+ return result;
+}
+
+/*
+ * MII support
+ */
+
+/**
+ * mdio_read - read PHY register
+ * @dev: Network device.
+ * @phy_id: The PHY id.
+ * @reg_num: The register number.
+ *
+ * This function returns the PHY register value.
+ *
+ * Return the register value.
+ */
+static int mdio_read(struct net_device *dev, int phy_id, int reg_num)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct ksz_port *port = &priv->port;
+ struct ksz_hw *hw = port->hw;
+ u16 val_out;
+
+ hw_r_phy(hw, port->linked->port_id, reg_num << 1, &val_out);
+ return val_out;
+}
+
+/**
+ * mdio_write - set PHY register
+ * @dev: Network device.
+ * @phy_id: The PHY id.
+ * @reg_num: The register number.
+ * @val: The register value.
+ *
+ * This procedure sets the PHY register value.
+ */
+static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct ksz_port *port = &priv->port;
+ struct ksz_hw *hw = port->hw;
+ int i;
+ int pi;
+
+ for (i = 0, pi = port->first_port; i < port->port_cnt; i++, pi++)
+ hw_w_phy(hw, pi, reg_num << 1, val);
+}
+
+/*
+ * ethtool support
+ */
+
+#define EEPROM_SIZE 0x40
+
+static u16 eeprom_data[EEPROM_SIZE] = { 0 };
+
+#define ADVERTISED_ALL \
+ (ADVERTISED_10baseT_Half | \
+ ADVERTISED_10baseT_Full | \
+ ADVERTISED_100baseT_Half | \
+ ADVERTISED_100baseT_Full)
+
+/* These functions use the MII functions in mii.c. */
+
+/**
+ * netdev_get_settings - get network device settings
+ * @dev: Network device.
+ * @cmd: Ethtool command.
+ *
+ * This function queries the PHY and returns its state in the ethtool command.
+ *
+ * Return 0 if successful; otherwise an error code.
+ */
+static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+
+ mutex_lock(&hw_priv->lock);
+ mii_ethtool_gset(&priv->mii_if, cmd);
+ cmd->advertising |= SUPPORTED_TP;
+ mutex_unlock(&hw_priv->lock);
+
+ /* Save advertised settings for workaround in next function. */
+ priv->advertising = cmd->advertising;
+ return 0;
+}
+
+/**
+ * netdev_set_settings - set network device settings
+ * @dev: Network device.
+ * @cmd: Ethtool command.
+ *
+ * This function sets the PHY according to the ethtool command.
+ *
+ * Return 0 if successful; otherwise an error code.
+ */
+static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_port *port = &priv->port;
+ u32 speed = ethtool_cmd_speed(cmd);
+ int rc;
+
+ /*
+ * ethtool utility does not change advertised setting if auto
+ * negotiation is not specified explicitly.
+ */
+ if (cmd->autoneg && priv->advertising == cmd->advertising) {
+ cmd->advertising |= ADVERTISED_ALL;
+ if (10 == speed)
+ cmd->advertising &=
+ ~(ADVERTISED_100baseT_Full |
+ ADVERTISED_100baseT_Half);
+ else if (100 == speed)
+ cmd->advertising &=
+ ~(ADVERTISED_10baseT_Full |
+ ADVERTISED_10baseT_Half);
+ if (0 == cmd->duplex)
+ cmd->advertising &=
+ ~(ADVERTISED_100baseT_Full |
+ ADVERTISED_10baseT_Full);
+ else if (1 == cmd->duplex)
+ cmd->advertising &=
+ ~(ADVERTISED_100baseT_Half |
+ ADVERTISED_10baseT_Half);
+ }
+ mutex_lock(&hw_priv->lock);
+ if (cmd->autoneg &&
+ (cmd->advertising & ADVERTISED_ALL) ==
+ ADVERTISED_ALL) {
+ port->duplex = 0;
+ port->speed = 0;
+ port->force_link = 0;
+ } else {
+ port->duplex = cmd->duplex + 1;
+ if (1000 != speed)
+ port->speed = speed;
+ if (cmd->autoneg)
+ port->force_link = 0;
+ else
+ port->force_link = 1;
+ }
+ rc = mii_ethtool_sset(&priv->mii_if, cmd);
+ mutex_unlock(&hw_priv->lock);
+ return rc;
+}
+
+/**
+ * netdev_nway_reset - restart auto-negotiation
+ * @dev: Network device.
+ *
+ * This function restarts the PHY for auto-negotiation.
+ *
+ * Return 0 if successful; otherwise an error code.
+ */
+static int netdev_nway_reset(struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ int rc;
+
+ mutex_lock(&hw_priv->lock);
+ rc = mii_nway_restart(&priv->mii_if);
+ mutex_unlock(&hw_priv->lock);
+ return rc;
+}
+
+/**
+ * netdev_get_link - get network device link status
+ * @dev: Network device.
+ *
+ * This function gets the link status from the PHY.
+ *
+ * Return true if PHY is linked and false otherwise.
+ */
+static u32 netdev_get_link(struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ int rc;
+
+ rc = mii_link_ok(&priv->mii_if);
+ return rc;
+}
+
+/**
+ * netdev_get_drvinfo - get network driver information
+ * @dev: Network device.
+ * @info: Ethtool driver info data structure.
+ *
+ * This procedure returns the driver information.
+ */
+static void netdev_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+
+ strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
+ strlcpy(info->version, DRV_VERSION, sizeof(info->version));
+ strlcpy(info->bus_info, pci_name(hw_priv->pdev),
+ sizeof(info->bus_info));
+}
+
+/**
+ * netdev_get_regs_len - get length of register dump
+ * @dev: Network device.
+ *
+ * This function returns the length of the register dump.
+ *
+ * Return length of the register dump.
+ */
+static struct hw_regs {
+ int start;
+ int end;
+} hw_regs_range[] = {
+ { KS_DMA_TX_CTRL, KS884X_INTERRUPTS_STATUS },
+ { KS_ADD_ADDR_0_LO, KS_ADD_ADDR_F_HI },
+ { KS884X_ADDR_0_OFFSET, KS8841_WOL_FRAME_BYTE2_OFFSET },
+ { KS884X_SIDER_P, KS8842_SGCR7_P },
+ { KS8842_MACAR1_P, KS8842_TOSR8_P },
+ { KS884X_P1MBCR_P, KS8842_P3ERCR_P },
+ { 0, 0 }
+};
+
+static int netdev_get_regs_len(struct net_device *dev)
+{
+ struct hw_regs *range = hw_regs_range;
+ int regs_len = 0x10 * sizeof(u32);
+
+ while (range->end > range->start) {
+ regs_len += (range->end - range->start + 3) / 4 * 4;
+ range++;
+ }
+ return regs_len;
+}
+
+/**
+ * netdev_get_regs - get register dump
+ * @dev: Network device.
+ * @regs: Ethtool registers data structure.
+ * @ptr: Buffer to store the register values.
+ *
+ * This procedure dumps the register values in the provided buffer.
+ */
+static void netdev_get_regs(struct net_device *dev, struct ethtool_regs *regs,
+ void *ptr)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ int *buf = (int *) ptr;
+ struct hw_regs *range = hw_regs_range;
+ int len;
+
+ mutex_lock(&hw_priv->lock);
+ regs->version = 0;
+ for (len = 0; len < 0x40; len += 4) {
+ pci_read_config_dword(hw_priv->pdev, len, buf);
+ buf++;
+ }
+ while (range->end > range->start) {
+ for (len = range->start; len < range->end; len += 4) {
+ *buf = readl(hw->io + len);
+ buf++;
+ }
+ range++;
+ }
+ mutex_unlock(&hw_priv->lock);
+}
+
+#define WOL_SUPPORT \
+ (WAKE_PHY | WAKE_MAGIC | \
+ WAKE_UCAST | WAKE_MCAST | \
+ WAKE_BCAST | WAKE_ARP)
+
+/**
+ * netdev_get_wol - get Wake-on-LAN support
+ * @dev: Network device.
+ * @wol: Ethtool Wake-on-LAN data structure.
+ *
+ * This procedure returns Wake-on-LAN support.
+ */
+static void netdev_get_wol(struct net_device *dev,
+ struct ethtool_wolinfo *wol)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+
+ wol->supported = hw_priv->wol_support;
+ wol->wolopts = hw_priv->wol_enable;
+ memset(&wol->sopass, 0, sizeof(wol->sopass));
+}
+
+/**
+ * netdev_set_wol - set Wake-on-LAN support
+ * @dev: Network device.
+ * @wol: Ethtool Wake-on-LAN data structure.
+ *
+ * This function sets Wake-on-LAN support.
+ *
+ * Return 0 if successful; otherwise an error code.
+ */
+static int netdev_set_wol(struct net_device *dev,
+ struct ethtool_wolinfo *wol)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+
+ /* Need to find a way to retrieve the device IP address. */
+ static const u8 net_addr[] = { 192, 168, 1, 1 };
+
+ if (wol->wolopts & ~hw_priv->wol_support)
+ return -EINVAL;
+
+ hw_priv->wol_enable = wol->wolopts;
+
+ /* Link wakeup cannot really be disabled. */
+ if (wol->wolopts)
+ hw_priv->wol_enable |= WAKE_PHY;
+ hw_enable_wol(&hw_priv->hw, hw_priv->wol_enable, net_addr);
+ return 0;
+}
+
+/**
+ * netdev_get_msglevel - get debug message level
+ * @dev: Network device.
+ *
+ * This function returns current debug message level.
+ *
+ * Return current debug message flags.
+ */
+static u32 netdev_get_msglevel(struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+
+ return priv->msg_enable;
+}
+
+/**
+ * netdev_set_msglevel - set debug message level
+ * @dev: Network device.
+ * @value: Debug message flags.
+ *
+ * This procedure sets debug message level.
+ */
+static void netdev_set_msglevel(struct net_device *dev, u32 value)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+
+ priv->msg_enable = value;
+}
+
+/**
+ * netdev_get_eeprom_len - get EEPROM length
+ * @dev: Network device.
+ *
+ * This function returns the length of the EEPROM.
+ *
+ * Return length of the EEPROM.
+ */
+static int netdev_get_eeprom_len(struct net_device *dev)
+{
+ return EEPROM_SIZE * 2;
+}
+
+/**
+ * netdev_get_eeprom - get EEPROM data
+ * @dev: Network device.
+ * @eeprom: Ethtool EEPROM data structure.
+ * @data: Buffer to store the EEPROM data.
+ *
+ * This function dumps the EEPROM data in the provided buffer.
+ *
+ * Return 0 if successful; otherwise an error code.
+ */
+#define EEPROM_MAGIC 0x10A18842
+
+static int netdev_get_eeprom(struct net_device *dev,
+ struct ethtool_eeprom *eeprom, u8 *data)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ u8 *eeprom_byte = (u8 *) eeprom_data;
+ int i;
+ int len;
+
+ len = (eeprom->offset + eeprom->len + 1) / 2;
+ for (i = eeprom->offset / 2; i < len; i++)
+ eeprom_data[i] = eeprom_read(&hw_priv->hw, i);
+ eeprom->magic = EEPROM_MAGIC;
+ memcpy(data, &eeprom_byte[eeprom->offset], eeprom->len);
+
+ return 0;
+}
+
+/**
+ * netdev_set_eeprom - write EEPROM data
+ * @dev: Network device.
+ * @eeprom: Ethtool EEPROM data structure.
+ * @data: Data buffer.
+ *
+ * This function modifies the EEPROM data one byte at a time.
+ *
+ * Return 0 if successful; otherwise an error code.
+ */
+static int netdev_set_eeprom(struct net_device *dev,
+ struct ethtool_eeprom *eeprom, u8 *data)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ u16 eeprom_word[EEPROM_SIZE];
+ u8 *eeprom_byte = (u8 *) eeprom_word;
+ int i;
+ int len;
+
+ if (eeprom->magic != EEPROM_MAGIC)
+ return -EINVAL;
+
+ len = (eeprom->offset + eeprom->len + 1) / 2;
+ for (i = eeprom->offset / 2; i < len; i++)
+ eeprom_data[i] = eeprom_read(&hw_priv->hw, i);
+ memcpy(eeprom_word, eeprom_data, EEPROM_SIZE * 2);
+ memcpy(&eeprom_byte[eeprom->offset], data, eeprom->len);
+ for (i = 0; i < EEPROM_SIZE; i++)
+ if (eeprom_word[i] != eeprom_data[i]) {
+ eeprom_data[i] = eeprom_word[i];
+ eeprom_write(&hw_priv->hw, i, eeprom_data[i]);
+ }
+
+ return 0;
+}
+
+/**
+ * netdev_get_pauseparam - get flow control parameters
+ * @dev: Network device.
+ * @pause: Ethtool PAUSE settings data structure.
+ *
+ * This procedure returns the PAUSE control flow settings.
+ */
+static void netdev_get_pauseparam(struct net_device *dev,
+ struct ethtool_pauseparam *pause)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+
+ pause->autoneg = (hw->overrides & PAUSE_FLOW_CTRL) ? 0 : 1;
+ if (!hw->ksz_switch) {
+ pause->rx_pause =
+ (hw->rx_cfg & DMA_RX_FLOW_ENABLE) ? 1 : 0;
+ pause->tx_pause =
+ (hw->tx_cfg & DMA_TX_FLOW_ENABLE) ? 1 : 0;
+ } else {
+ pause->rx_pause =
+ (sw_chk(hw, KS8842_SWITCH_CTRL_1_OFFSET,
+ SWITCH_RX_FLOW_CTRL)) ? 1 : 0;
+ pause->tx_pause =
+ (sw_chk(hw, KS8842_SWITCH_CTRL_1_OFFSET,
+ SWITCH_TX_FLOW_CTRL)) ? 1 : 0;
+ }
+}
+
+/**
+ * netdev_set_pauseparam - set flow control parameters
+ * @dev: Network device.
+ * @pause: Ethtool PAUSE settings data structure.
+ *
+ * This function sets the PAUSE control flow settings.
+ * Not implemented yet.
+ *
+ * Return 0 if successful; otherwise an error code.
+ */
+static int netdev_set_pauseparam(struct net_device *dev,
+ struct ethtool_pauseparam *pause)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct ksz_port *port = &priv->port;
+
+ mutex_lock(&hw_priv->lock);
+ if (pause->autoneg) {
+ if (!pause->rx_pause && !pause->tx_pause)
+ port->flow_ctrl = PHY_NO_FLOW_CTRL;
+ else
+ port->flow_ctrl = PHY_FLOW_CTRL;
+ hw->overrides &= ~PAUSE_FLOW_CTRL;
+ port->force_link = 0;
+ if (hw->ksz_switch) {
+ sw_cfg(hw, KS8842_SWITCH_CTRL_1_OFFSET,
+ SWITCH_RX_FLOW_CTRL, 1);
+ sw_cfg(hw, KS8842_SWITCH_CTRL_1_OFFSET,
+ SWITCH_TX_FLOW_CTRL, 1);
+ }
+ port_set_link_speed(port);
+ } else {
+ hw->overrides |= PAUSE_FLOW_CTRL;
+ if (hw->ksz_switch) {
+ sw_cfg(hw, KS8842_SWITCH_CTRL_1_OFFSET,
+ SWITCH_RX_FLOW_CTRL, pause->rx_pause);
+ sw_cfg(hw, KS8842_SWITCH_CTRL_1_OFFSET,
+ SWITCH_TX_FLOW_CTRL, pause->tx_pause);
+ } else
+ set_flow_ctrl(hw, pause->rx_pause, pause->tx_pause);
+ }
+ mutex_unlock(&hw_priv->lock);
+
+ return 0;
+}
+
+/**
+ * netdev_get_ringparam - get tx/rx ring parameters
+ * @dev: Network device.
+ * @pause: Ethtool RING settings data structure.
+ *
+ * This procedure returns the TX/RX ring settings.
+ */
+static void netdev_get_ringparam(struct net_device *dev,
+ struct ethtool_ringparam *ring)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+
+ ring->tx_max_pending = (1 << 9);
+ ring->tx_pending = hw->tx_desc_info.alloc;
+ ring->rx_max_pending = (1 << 9);
+ ring->rx_pending = hw->rx_desc_info.alloc;
+}
+
+#define STATS_LEN (TOTAL_PORT_COUNTER_NUM)
+
+static struct {
+ char string[ETH_GSTRING_LEN];
+} ethtool_stats_keys[STATS_LEN] = {
+ { "rx_lo_priority_octets" },
+ { "rx_hi_priority_octets" },
+ { "rx_undersize_packets" },
+ { "rx_fragments" },
+ { "rx_oversize_packets" },
+ { "rx_jabbers" },
+ { "rx_symbol_errors" },
+ { "rx_crc_errors" },
+ { "rx_align_errors" },
+ { "rx_mac_ctrl_packets" },
+ { "rx_pause_packets" },
+ { "rx_bcast_packets" },
+ { "rx_mcast_packets" },
+ { "rx_ucast_packets" },
+ { "rx_64_or_less_octet_packets" },
+ { "rx_65_to_127_octet_packets" },
+ { "rx_128_to_255_octet_packets" },
+ { "rx_256_to_511_octet_packets" },
+ { "rx_512_to_1023_octet_packets" },
+ { "rx_1024_to_1522_octet_packets" },
+
+ { "tx_lo_priority_octets" },
+ { "tx_hi_priority_octets" },
+ { "tx_late_collisions" },
+ { "tx_pause_packets" },
+ { "tx_bcast_packets" },
+ { "tx_mcast_packets" },
+ { "tx_ucast_packets" },
+ { "tx_deferred" },
+ { "tx_total_collisions" },
+ { "tx_excessive_collisions" },
+ { "tx_single_collisions" },
+ { "tx_mult_collisions" },
+
+ { "rx_discards" },
+ { "tx_discards" },
+};
+
+/**
+ * netdev_get_strings - get statistics identity strings
+ * @dev: Network device.
+ * @stringset: String set identifier.
+ * @buf: Buffer to store the strings.
+ *
+ * This procedure returns the strings used to identify the statistics.
+ */
+static void netdev_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+
+ if (ETH_SS_STATS == stringset)
+ memcpy(buf, ðtool_stats_keys,
+ ETH_GSTRING_LEN * hw->mib_cnt);
+}
+
+/**
+ * netdev_get_sset_count - get statistics size
+ * @dev: Network device.
+ * @sset: The statistics set number.
+ *
+ * This function returns the size of the statistics to be reported.
+ *
+ * Return size of the statistics to be reported.
+ */
+static int netdev_get_sset_count(struct net_device *dev, int sset)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+
+ switch (sset) {
+ case ETH_SS_STATS:
+ return hw->mib_cnt;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+/**
+ * netdev_get_ethtool_stats - get network device statistics
+ * @dev: Network device.
+ * @stats: Ethtool statistics data structure.
+ * @data: Buffer to store the statistics.
+ *
+ * This procedure returns the statistics.
+ */
+static void netdev_get_ethtool_stats(struct net_device *dev,
+ struct ethtool_stats *stats, u64 *data)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct ksz_port *port = &priv->port;
+ int n_stats = stats->n_stats;
+ int i;
+ int n;
+ int p;
+ int rc;
+ u64 counter[TOTAL_PORT_COUNTER_NUM];
+
+ mutex_lock(&hw_priv->lock);
+ n = SWITCH_PORT_NUM;
+ for (i = 0, p = port->first_port; i < port->mib_port_cnt; i++, p++) {
+ if (media_connected == hw->port_mib[p].state) {
+ hw_priv->counter[p].read = 1;
+
+ /* Remember first port that requests read. */
+ if (n == SWITCH_PORT_NUM)
+ n = p;
+ }
+ }
+ mutex_unlock(&hw_priv->lock);
+
+ if (n < SWITCH_PORT_NUM)
+ schedule_work(&hw_priv->mib_read);
+
+ if (1 == port->mib_port_cnt && n < SWITCH_PORT_NUM) {
+ p = n;
+ rc = wait_event_interruptible_timeout(
+ hw_priv->counter[p].counter,
+ 2 == hw_priv->counter[p].read,
+ HZ * 1);
+ } else
+ for (i = 0, p = n; i < port->mib_port_cnt - n; i++, p++) {
+ if (0 == i) {
+ rc = wait_event_interruptible_timeout(
+ hw_priv->counter[p].counter,
+ 2 == hw_priv->counter[p].read,
+ HZ * 2);
+ } else if (hw->port_mib[p].cnt_ptr) {
+ rc = wait_event_interruptible_timeout(
+ hw_priv->counter[p].counter,
+ 2 == hw_priv->counter[p].read,
+ HZ * 1);
+ }
+ }
+
+ get_mib_counters(hw, port->first_port, port->mib_port_cnt, counter);
+ n = hw->mib_cnt;
+ if (n > n_stats)
+ n = n_stats;
+ n_stats -= n;
+ for (i = 0; i < n; i++)
+ *data++ = counter[i];
+}
+
+/**
+ * netdev_set_features - set receive checksum support
+ * @dev: Network device.
+ * @features: New device features (offloads).
+ *
+ * This function sets receive checksum support setting.
+ *
+ * Return 0 if successful; otherwise an error code.
+ */
+static int netdev_set_features(struct net_device *dev,
+ netdev_features_t features)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+
+ mutex_lock(&hw_priv->lock);
+
+ /* see note in hw_setup() */
+ if (features & NETIF_F_RXCSUM)
+ hw->rx_cfg |= DMA_RX_CSUM_TCP | DMA_RX_CSUM_IP;
+ else
+ hw->rx_cfg &= ~(DMA_RX_CSUM_TCP | DMA_RX_CSUM_IP);
+
+ if (hw->enabled)
+ writel(hw->rx_cfg, hw->io + KS_DMA_RX_CTRL);
+
+ mutex_unlock(&hw_priv->lock);
+
+ return 0;
+}
+
+static const struct ethtool_ops netdev_ethtool_ops = {
+ .get_settings = netdev_get_settings,
+ .set_settings = netdev_set_settings,
+ .nway_reset = netdev_nway_reset,
+ .get_link = netdev_get_link,
+ .get_drvinfo = netdev_get_drvinfo,
+ .get_regs_len = netdev_get_regs_len,
+ .get_regs = netdev_get_regs,
+ .get_wol = netdev_get_wol,
+ .set_wol = netdev_set_wol,
+ .get_msglevel = netdev_get_msglevel,
+ .set_msglevel = netdev_set_msglevel,
+ .get_eeprom_len = netdev_get_eeprom_len,
+ .get_eeprom = netdev_get_eeprom,
+ .set_eeprom = netdev_set_eeprom,
+ .get_pauseparam = netdev_get_pauseparam,
+ .set_pauseparam = netdev_set_pauseparam,
+ .get_ringparam = netdev_get_ringparam,
+ .get_strings = netdev_get_strings,
+ .get_sset_count = netdev_get_sset_count,
+ .get_ethtool_stats = netdev_get_ethtool_stats,
+};
+
+/*
+ * Hardware monitoring
+ */
+
+static void update_link(struct net_device *dev, struct dev_priv *priv,
+ struct ksz_port *port)
+{
+ if (priv->media_state != port->linked->state) {
+ priv->media_state = port->linked->state;
+ if (netif_running(dev))
+ set_media_state(dev, media_connected);
+ }
+}
+
+static void mib_read_work(struct work_struct *work)
+{
+ struct dev_info *hw_priv =
+ container_of(work, struct dev_info, mib_read);
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct ksz_port_mib *mib;
+ int i;
+
+ next_jiffies = jiffies;
+ for (i = 0; i < hw->mib_port_cnt; i++) {
+ mib = &hw->port_mib[i];
+
+ /* Reading MIB counters or requested to read. */
+ if (mib->cnt_ptr || 1 == hw_priv->counter[i].read) {
+
+ /* Need to process receive interrupt. */
+ if (port_r_cnt(hw, i))
+ break;
+ hw_priv->counter[i].read = 0;
+
+ /* Finish reading counters. */
+ if (0 == mib->cnt_ptr) {
+ hw_priv->counter[i].read = 2;
+ wake_up_interruptible(
+ &hw_priv->counter[i].counter);
+ }
+ } else if (jiffies >= hw_priv->counter[i].time) {
+ /* Only read MIB counters when the port is connected. */
+ if (media_connected == mib->state)
+ hw_priv->counter[i].read = 1;
+ next_jiffies += HZ * 1 * hw->mib_port_cnt;
+ hw_priv->counter[i].time = next_jiffies;
+
+ /* Port is just disconnected. */
+ } else if (mib->link_down) {
+ mib->link_down = 0;
+
+ /* Read counters one last time after link is lost. */
+ hw_priv->counter[i].read = 1;
+ }
+ }
+}
+
+static void mib_monitor(unsigned long ptr)
+{
+ struct dev_info *hw_priv = (struct dev_info *) ptr;
+
+ mib_read_work(&hw_priv->mib_read);
+
+ /* This is used to verify Wake-on-LAN is working. */
+ if (hw_priv->pme_wait) {
+ if (hw_priv->pme_wait <= jiffies) {
+ hw_clr_wol_pme_status(&hw_priv->hw);
+ hw_priv->pme_wait = 0;
+ }
+ } else if (hw_chk_wol_pme_status(&hw_priv->hw)) {
+
+ /* PME is asserted. Wait 2 seconds to clear it. */
+ hw_priv->pme_wait = jiffies + HZ * 2;
+ }
+
+ ksz_update_timer(&hw_priv->mib_timer_info);
+}
+
+/**
+ * dev_monitor - periodic monitoring
+ * @ptr: Network device pointer.
+ *
+ * This routine is run in a kernel timer to monitor the network device.
+ */
+static void dev_monitor(unsigned long ptr)
+{
+ struct net_device *dev = (struct net_device *) ptr;
+ struct dev_priv *priv = netdev_priv(dev);
+ struct dev_info *hw_priv = priv->adapter;
+ struct ksz_hw *hw = &hw_priv->hw;
+ struct ksz_port *port = &priv->port;
+
+ if (!(hw->features & LINK_INT_WORKING))
+ port_get_link_speed(port);
+ update_link(dev, priv, port);
+
+ ksz_update_timer(&priv->monitor_timer_info);
+}
+
+/*
+ * Linux network device interface functions
+ */
+
+/* Driver exported variables */
+
+static int msg_enable;
+
+static char *macaddr = ":";
+static char *mac1addr = ":";
+
+/*
+ * This enables multiple network device mode for KSZ8842, which contains a
+ * switch with two physical ports. Some users like to take control of the
+ * ports for running Spanning Tree Protocol. The driver will create an
+ * additional eth? device for the other port.
+ *
+ * Some limitations are the network devices cannot have different MTU and
+ * multicast hash tables.
+ */
+static int multi_dev;
+
+/*
+ * As most users select multiple network device mode to use Spanning Tree
+ * Protocol, this enables a feature in which most unicast and multicast packets
+ * are forwarded inside the switch and not passed to the host. Only packets
+ * that need the host's attention are passed to it. This prevents the host
+ * wasting CPU time to examine each and every incoming packets and do the
+ * forwarding itself.
+ *
+ * As the hack requires the private bridge header, the driver cannot compile
+ * with just the kernel headers.
+ *
+ * Enabling STP support also turns on multiple network device mode.
+ */
+static int stp;
+
+/*
+ * This enables fast aging in the KSZ8842 switch. Not sure what situation
+ * needs that. However, fast aging is used to flush the dynamic MAC table when
+ * STP support is enabled.
+ */
+static int fast_aging;
+
+/**
+ * netdev_init - initialize network device.
+ * @dev: Network device.
+ *
+ * This function initializes the network device.
+ *
+ * Return 0 if successful; otherwise an error code indicating failure.
+ */
+static int __init netdev_init(struct net_device *dev)
+{
+ struct dev_priv *priv = netdev_priv(dev);
+
+ /* 500 ms timeout */
+ ksz_init_timer(&priv->monitor_timer_info, 500 * HZ / 1000,
+ dev_monitor, dev);
+
+ /* 500 ms timeout */
+ dev->watchdog_timeo = HZ / 2;
+
+ dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_RXCSUM;
+
+ /*
+ * Hardware does not really support IPv6 checksum generation, but
+ * driver actually runs faster with this on.
+ */
+ dev->hw_features |= NETIF_F_IPV6_CSUM;
+
+ dev->features |= dev->hw_features;
+
+ sema_init(&priv->proc_sem, 1);
+
+ priv->mii_if.phy_id_mask = 0x1;
+ priv->mii_if.reg_num_mask = 0x7;
+ priv->mii_if.dev = dev;
+ priv->mii_if.mdio_read = mdio_read;
+ priv->mii_if.mdio_write = mdio_write;
+ priv->mii_if.phy_id = priv->port.first_port + 1;
+
+ priv->msg_enable = netif_msg_init(msg_enable,
+ (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK));
+
+ return 0;
+}
+
+static const struct net_device_ops netdev_ops = {
+ .ndo_init = netdev_init,
+ .ndo_open = netdev_open,
+ .ndo_stop = netdev_close,
+ .ndo_get_stats = netdev_query_statistics,
+ .ndo_start_xmit = netdev_tx,
+ .ndo_tx_timeout = netdev_tx_timeout,
+ .ndo_change_mtu = netdev_change_mtu,
+ .ndo_set_features = netdev_set_features,
+ .ndo_set_mac_address = netdev_set_mac_address,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_do_ioctl = netdev_ioctl,
+ .ndo_set_rx_mode = netdev_set_rx_mode,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = netdev_netpoll,
+#endif
+};
+
+static void netdev_free(struct net_device *dev)
+{
+ if (dev->watchdog_timeo)
+ unregister_netdev(dev);
+
+ free_netdev(dev);
+}
+
+struct platform_info {
+ struct dev_info dev_info;
+ struct net_device *netdev[SWITCH_PORT_NUM];
+};
+
+static int net_device_present;
+
+static void get_mac_addr(struct dev_info *hw_priv, u8 *macaddr, int port)
+{
+ int i;
+ int j;
+ int got_num;
+ int num;
+
+ i = j = num = got_num = 0;
+ while (j < ETH_ALEN) {
+ if (macaddr[i]) {
+ int digit;
+
+ got_num = 1;
+ digit = hex_to_bin(macaddr[i]);
+ if (digit >= 0)
+ num = num * 16 + digit;
+ else if (':' == macaddr[i])
+ got_num = 2;
+ else
+ break;
+ } else if (got_num)
+ got_num = 2;
+ else
+ break;
+ if (2 == got_num) {
+ if (MAIN_PORT == port) {
+ hw_priv->hw.override_addr[j++] = (u8) num;
+ hw_priv->hw.override_addr[5] +=
+ hw_priv->hw.id;
+ } else {
+ hw_priv->hw.ksz_switch->other_addr[j++] =
+ (u8) num;
+ hw_priv->hw.ksz_switch->other_addr[5] +=
+ hw_priv->hw.id;
+ }
+ num = got_num = 0;
+ }
+ i++;
+ }
+ if (ETH_ALEN == j) {
+ if (MAIN_PORT == port)
+ hw_priv->hw.mac_override = 1;
+ }
+}
+
+#define KS884X_DMA_MASK (~0x0UL)
+
+static void read_other_addr(struct ksz_hw *hw)
+{
+ int i;
+ u16 data[3];
+ struct ksz_switch *sw = hw->ksz_switch;
+
+ for (i = 0; i < 3; i++)
+ data[i] = eeprom_read(hw, i + EEPROM_DATA_OTHER_MAC_ADDR);
+ if ((data[0] || data[1] || data[2]) && data[0] != 0xffff) {
+ sw->other_addr[5] = (u8) data[0];
+ sw->other_addr[4] = (u8)(data[0] >> 8);
+ sw->other_addr[3] = (u8) data[1];
+ sw->other_addr[2] = (u8)(data[1] >> 8);
+ sw->other_addr[1] = (u8) data[2];
+ sw->other_addr[0] = (u8)(data[2] >> 8);
+ }
+}
+
+#ifndef PCI_VENDOR_ID_MICREL_KS
+#define PCI_VENDOR_ID_MICREL_KS 0x16c6
+#endif
+
+static int pcidev_init(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct net_device *dev;
+ struct dev_priv *priv;
+ struct dev_info *hw_priv;
+ struct ksz_hw *hw;
+ struct platform_info *info;
+ struct ksz_port *port;
+ unsigned long reg_base;
+ unsigned long reg_len;
+ int cnt;
+ int i;
+ int mib_port_count;
+ int pi;
+ int port_count;
+ int result;
+ char banner[sizeof(version)];
+ struct ksz_switch *sw = NULL;
+
+ result = pci_enable_device(pdev);
+ if (result)
+ return result;
+
+ result = -ENODEV;
+
+ if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) ||
+ pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
+ return result;
+
+ reg_base = pci_resource_start(pdev, 0);
+ reg_len = pci_resource_len(pdev, 0);
+ if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0)
+ return result;
+
+ if (!request_mem_region(reg_base, reg_len, DRV_NAME))
+ return result;
+ pci_set_master(pdev);
+
+ result = -ENOMEM;
+
+ info = kzalloc(sizeof(struct platform_info), GFP_KERNEL);
+ if (!info)
+ goto pcidev_init_dev_err;
+
+ hw_priv = &info->dev_info;
+ hw_priv->pdev = pdev;
+
+ hw = &hw_priv->hw;
+
+ hw->io = ioremap(reg_base, reg_len);
+ if (!hw->io)
+ goto pcidev_init_io_err;
+
+ cnt = hw_init(hw);
+ if (!cnt) {
+ if (msg_enable & NETIF_MSG_PROBE)
+ pr_alert("chip not detected\n");
+ result = -ENODEV;
+ goto pcidev_init_alloc_err;
+ }
+
+ snprintf(banner, sizeof(banner), "%s", version);
+ banner[13] = cnt + '0'; /* Replace x in "Micrel KSZ884x" */
+ dev_info(&hw_priv->pdev->dev, "%s\n", banner);
+ dev_dbg(&hw_priv->pdev->dev, "Mem = %p; IRQ = %d\n", hw->io, pdev->irq);
+
+ /* Assume device is KSZ8841. */
+ hw->dev_count = 1;
+ port_count = 1;
+ mib_port_count = 1;
+ hw->addr_list_size = 0;
+ hw->mib_cnt = PORT_COUNTER_NUM;
+ hw->mib_port_cnt = 1;
+
+ /* KSZ8842 has a switch with multiple ports. */
+ if (2 == cnt) {
+ if (fast_aging)
+ hw->overrides |= FAST_AGING;
+
+ hw->mib_cnt = TOTAL_PORT_COUNTER_NUM;
+
+ /* Multiple network device interfaces are required. */
+ if (multi_dev) {
+ hw->dev_count = SWITCH_PORT_NUM;
+ hw->addr_list_size = SWITCH_PORT_NUM - 1;
+ }
+
+ /* Single network device has multiple ports. */
+ if (1 == hw->dev_count) {
+ port_count = SWITCH_PORT_NUM;
+ mib_port_count = SWITCH_PORT_NUM;
+ }
+ hw->mib_port_cnt = TOTAL_PORT_NUM;
+ hw->ksz_switch = kzalloc(sizeof(struct ksz_switch), GFP_KERNEL);
+ if (!hw->ksz_switch)
+ goto pcidev_init_alloc_err;
+
+ sw = hw->ksz_switch;
+ }
+ for (i = 0; i < hw->mib_port_cnt; i++)
+ hw->port_mib[i].mib_start = 0;
+
+ hw->parent = hw_priv;
+
+ /* Default MTU is 1500. */
+ hw_priv->mtu = (REGULAR_RX_BUF_SIZE + 3) & ~3;
+
+ if (ksz_alloc_mem(hw_priv))
+ goto pcidev_init_mem_err;
+
+ hw_priv->hw.id = net_device_present;
+
+ spin_lock_init(&hw_priv->hwlock);
+ mutex_init(&hw_priv->lock);
+
+ for (i = 0; i < TOTAL_PORT_NUM; i++)
+ init_waitqueue_head(&hw_priv->counter[i].counter);
+
+ if (macaddr[0] != ':')
+ get_mac_addr(hw_priv, macaddr, MAIN_PORT);
+
+ /* Read MAC address and initialize override address if not overrided. */
+ hw_read_addr(hw);
+
+ /* Multiple device interfaces mode requires a second MAC address. */
+ if (hw->dev_count > 1) {
+ memcpy(sw->other_addr, hw->override_addr, ETH_ALEN);
+ read_other_addr(hw);
+ if (mac1addr[0] != ':')
+ get_mac_addr(hw_priv, mac1addr, OTHER_PORT);
+ }
+
+ hw_setup(hw);
+ if (hw->ksz_switch)
+ sw_setup(hw);
+ else {
+ hw_priv->wol_support = WOL_SUPPORT;
+ hw_priv->wol_enable = 0;
+ }
+
+ INIT_WORK(&hw_priv->mib_read, mib_read_work);
+
+ /* 500 ms timeout */
+ ksz_init_timer(&hw_priv->mib_timer_info, 500 * HZ / 1000,
+ mib_monitor, hw_priv);
+
+ for (i = 0; i < hw->dev_count; i++) {
+ dev = alloc_etherdev(sizeof(struct dev_priv));
+ if (!dev)
+ goto pcidev_init_reg_err;
+ SET_NETDEV_DEV(dev, &pdev->dev);
+ info->netdev[i] = dev;
+
+ priv = netdev_priv(dev);
+ priv->adapter = hw_priv;
+ priv->id = net_device_present++;
+
+ port = &priv->port;
+ port->port_cnt = port_count;
+ port->mib_port_cnt = mib_port_count;
+ port->first_port = i;
+ port->flow_ctrl = PHY_FLOW_CTRL;
+
+ port->hw = hw;
+ port->linked = &hw->port_info[port->first_port];
+
+ for (cnt = 0, pi = i; cnt < port_count; cnt++, pi++) {
+ hw->port_info[pi].port_id = pi;
+ hw->port_info[pi].pdev = dev;
+ hw->port_info[pi].state = media_disconnected;
+ }
+
+ dev->mem_start = (unsigned long) hw->io;
+ dev->mem_end = dev->mem_start + reg_len - 1;
+ dev->irq = pdev->irq;
+ if (MAIN_PORT == i)
+ memcpy(dev->dev_addr, hw_priv->hw.override_addr,
+ ETH_ALEN);
+ else {
+ memcpy(dev->dev_addr, sw->other_addr, ETH_ALEN);
+ if (ether_addr_equal(sw->other_addr, hw->override_addr))
+ dev->dev_addr[5] += port->first_port;
+ }
+
+ dev->netdev_ops = &netdev_ops;
+ dev->ethtool_ops = &netdev_ethtool_ops;
+ if (register_netdev(dev))
+ goto pcidev_init_reg_err;
+ port_set_power_saving(port, true);
+ }
+
+ pci_dev_get(hw_priv->pdev);
+ pci_set_drvdata(pdev, info);
+ return 0;
+
+pcidev_init_reg_err:
+ for (i = 0; i < hw->dev_count; i++) {
+ if (info->netdev[i]) {
+ netdev_free(info->netdev[i]);
+ info->netdev[i] = NULL;
+ }
+ }
+
+pcidev_init_mem_err:
+ ksz_free_mem(hw_priv);
+ kfree(hw->ksz_switch);
+
+pcidev_init_alloc_err:
+ iounmap(hw->io);
+
+pcidev_init_io_err:
+ kfree(info);
+
+pcidev_init_dev_err:
+ release_mem_region(reg_base, reg_len);
+
+ return result;
+}
+
+static void pcidev_exit(struct pci_dev *pdev)
+{
+ int i;
+ struct platform_info *info = pci_get_drvdata(pdev);
+ struct dev_info *hw_priv = &info->dev_info;
+
+ release_mem_region(pci_resource_start(pdev, 0),
+ pci_resource_len(pdev, 0));
+ for (i = 0; i < hw_priv->hw.dev_count; i++) {
+ if (info->netdev[i])
+ netdev_free(info->netdev[i]);
+ }
+ if (hw_priv->hw.io)
+ iounmap(hw_priv->hw.io);
+ ksz_free_mem(hw_priv);
+ kfree(hw_priv->hw.ksz_switch);
+ pci_dev_put(hw_priv->pdev);
+ kfree(info);
+}
+
+#ifdef CONFIG_PM
+static int pcidev_resume(struct pci_dev *pdev)
+{
+ int i;
+ struct platform_info *info = pci_get_drvdata(pdev);
+ struct dev_info *hw_priv = &info->dev_info;
+ struct ksz_hw *hw = &hw_priv->hw;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+ pci_enable_wake(pdev, PCI_D0, 0);
+
+ if (hw_priv->wol_enable)
+ hw_cfg_wol_pme(hw, 0);
+ for (i = 0; i < hw->dev_count; i++) {
+ if (info->netdev[i]) {
+ struct net_device *dev = info->netdev[i];
+
+ if (netif_running(dev)) {
+ netdev_open(dev);
+ netif_device_attach(dev);
+ }
+ }
+ }
+ return 0;
+}
+
+static int pcidev_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ int i;
+ struct platform_info *info = pci_get_drvdata(pdev);
+ struct dev_info *hw_priv = &info->dev_info;
+ struct ksz_hw *hw = &hw_priv->hw;
+
+ /* Need to find a way to retrieve the device IP address. */
+ static const u8 net_addr[] = { 192, 168, 1, 1 };
+
+ for (i = 0; i < hw->dev_count; i++) {
+ if (info->netdev[i]) {
+ struct net_device *dev = info->netdev[i];
+
+ if (netif_running(dev)) {
+ netif_device_detach(dev);
+ netdev_close(dev);
+ }
+ }
+ }
+ if (hw_priv->wol_enable) {
+ hw_enable_wol(hw, hw_priv->wol_enable, net_addr);
+ hw_cfg_wol_pme(hw, 1);
+ }
+
+ pci_save_state(pdev);
+ pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+ return 0;
+}
+#endif
+
+static char pcidev_name[] = "ksz884xp";
+
+static const struct pci_device_id pcidev_table[] = {
+ { PCI_VENDOR_ID_MICREL_KS, 0x8841,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { PCI_VENDOR_ID_MICREL_KS, 0x8842,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { 0 }
+};
+
+MODULE_DEVICE_TABLE(pci, pcidev_table);
+
+static struct pci_driver pci_device_driver = {
+#ifdef CONFIG_PM
+ .suspend = pcidev_suspend,
+ .resume = pcidev_resume,
+#endif
+ .name = pcidev_name,
+ .id_table = pcidev_table,
+ .probe = pcidev_init,
+ .remove = pcidev_exit
+};
+
+module_pci_driver(pci_device_driver);
+
+MODULE_DESCRIPTION("KSZ8841/2 PCI network driver");
+MODULE_AUTHOR("Tristram Ha <Tristram.Ha@micrel.com>");
+MODULE_LICENSE("GPL");
+
+module_param_named(message, msg_enable, int, 0);
+MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)");
+
+module_param(macaddr, charp, 0);
+module_param(mac1addr, charp, 0);
+module_param(fast_aging, int, 0);
+module_param(multi_dev, int, 0);
+module_param(stp, int, 0);
+MODULE_PARM_DESC(macaddr, "MAC address");
+MODULE_PARM_DESC(mac1addr, "Second MAC address");
+MODULE_PARM_DESC(fast_aging, "Fast aging");
+MODULE_PARM_DESC(multi_dev, "Multiple device interfaces");
+MODULE_PARM_DESC(stp, "STP support");
Code Review / kvmfornfv.git / blobdiff