--- /dev/null
+/* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0
+ * driver for linux.
+ * Written 1996 by Russell Nelson, with reference to skeleton.c
+ * written 1993-1994 by Donald Becker.
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * The author may be reached at nelson@crynwr.com, Crynwr
+ * Software, 521 Pleasant Valley Rd., Potsdam, NY 13676
+ *
+ * Other contributors:
+ * Mike Cruse : mcruse@cti-ltd.com
+ * Russ Nelson
+ * Melody Lee : ethernet@crystal.cirrus.com
+ * Alan Cox
+ * Andrew Morton
+ * Oskar Schirmer : oskar@scara.com
+ * Deepak Saxena : dsaxena@plexity.net
+ * Dmitry Pervushin : dpervushin@ru.mvista.com
+ * Deepak Saxena : dsaxena@plexity.net
+ * Domenico Andreoli : cavokz@gmail.com
+ */
+
+
+/*
+ * Set this to zero to disable DMA code
+ *
+ * Note that even if DMA is turned off we still support the 'dma' and 'use_dma'
+ * module options so we don't break any startup scripts.
+ */
+#ifndef CONFIG_ISA_DMA_API
+#define ALLOW_DMA 0
+#else
+#define ALLOW_DMA 1
+#endif
+
+/*
+ * Set this to zero to remove all the debug statements via
+ * dead code elimination
+ */
+#define DEBUGGING 1
+
+/* Sources:
+ * Crynwr packet driver epktisa.
+ * Crystal Semiconductor data sheets.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/printk.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/platform_device.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/jiffies.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/gfp.h>
+#include <linux/io.h>
+
+#include <asm/irq.h>
+#include <linux/atomic.h>
+#if ALLOW_DMA
+#include <asm/dma.h>
+#endif
+
+#include "cs89x0.h"
+
+#define cs89_dbg(val, level, fmt, ...) \
+do { \
+ if (val <= net_debug) \
+ pr_##level(fmt, ##__VA_ARGS__); \
+} while (0)
+
+static char version[] __initdata =
+ "v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton";
+
+#define DRV_NAME "cs89x0"
+
+/* First, a few definitions that the brave might change.
+ * A zero-terminated list of I/O addresses to be probed. Some special flags..
+ * Addr & 1 = Read back the address port, look for signature and reset
+ * the page window before probing
+ * Addr & 3 = Reset the page window and probe
+ * The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,
+ * but it is possible that a Cirrus board could be plugged into the ISA
+ * slots.
+ */
+/* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps
+ * them to system IRQ numbers. This mapping is card specific and is set to
+ * the configuration of the Cirrus Eval board for this chip.
+ */
+#ifndef CONFIG_CS89x0_PLATFORM
+static unsigned int netcard_portlist[] __used __initdata = {
+ 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240,
+ 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0
+};
+static unsigned int cs8900_irq_map[] = {
+ 10, 11, 12, 5
+};
+#endif
+
+#if DEBUGGING
+static unsigned int net_debug = DEBUGGING;
+#else
+#define net_debug 0 /* gcc will remove all the debug code for us */
+#endif
+
+/* The number of low I/O ports used by the ethercard. */
+#define NETCARD_IO_EXTENT 16
+
+/* we allow the user to override various values normally set in the EEPROM */
+#define FORCE_RJ45 0x0001 /* pick one of these three */
+#define FORCE_AUI 0x0002
+#define FORCE_BNC 0x0004
+
+#define FORCE_AUTO 0x0010 /* pick one of these three */
+#define FORCE_HALF 0x0020
+#define FORCE_FULL 0x0030
+
+/* Information that need to be kept for each board. */
+struct net_local {
+ int chip_type; /* one of: CS8900, CS8920, CS8920M */
+ char chip_revision; /* revision letter of the chip ('A'...) */
+ int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
+ int auto_neg_cnf; /* auto-negotiation word from EEPROM */
+ int adapter_cnf; /* adapter configuration from EEPROM */
+ int isa_config; /* ISA configuration from EEPROM */
+ int irq_map; /* IRQ map from EEPROM */
+ int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
+ int curr_rx_cfg; /* a copy of PP_RxCFG */
+ int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
+ int send_underrun; /* keep track of how many underruns in a row we get */
+ int force; /* force various values; see FORCE* above. */
+ spinlock_t lock;
+ void __iomem *virt_addr;/* CS89x0 virtual address. */
+#if ALLOW_DMA
+ int use_dma; /* Flag: we're using dma */
+ int dma; /* DMA channel */
+ int dmasize; /* 16 or 64 */
+ unsigned char *dma_buff; /* points to the beginning of the buffer */
+ unsigned char *end_dma_buff; /* points to the end of the buffer */
+ unsigned char *rx_dma_ptr; /* points to the next packet */
+#endif
+};
+
+/* Example routines you must write ;->. */
+#define tx_done(dev) 1
+
+/*
+ * Permit 'cs89x0_dma=N' in the kernel boot environment
+ */
+#if !defined(MODULE)
+#if ALLOW_DMA
+static int g_cs89x0_dma;
+
+static int __init dma_fn(char *str)
+{
+ g_cs89x0_dma = simple_strtol(str, NULL, 0);
+ return 1;
+}
+
+__setup("cs89x0_dma=", dma_fn);
+#endif /* ALLOW_DMA */
+
+static int g_cs89x0_media__force;
+
+static int __init media_fn(char *str)
+{
+ if (!strcmp(str, "rj45"))
+ g_cs89x0_media__force = FORCE_RJ45;
+ else if (!strcmp(str, "aui"))
+ g_cs89x0_media__force = FORCE_AUI;
+ else if (!strcmp(str, "bnc"))
+ g_cs89x0_media__force = FORCE_BNC;
+
+ return 1;
+}
+
+__setup("cs89x0_media=", media_fn);
+#endif
+
+static void readwords(struct net_local *lp, int portno, void *buf, int length)
+{
+ u8 *buf8 = (u8 *)buf;
+
+ do {
+ u16 tmp16;
+
+ tmp16 = ioread16(lp->virt_addr + portno);
+ *buf8++ = (u8)tmp16;
+ *buf8++ = (u8)(tmp16 >> 8);
+ } while (--length);
+}
+
+static void writewords(struct net_local *lp, int portno, void *buf, int length)
+{
+ u8 *buf8 = (u8 *)buf;
+
+ do {
+ u16 tmp16;
+
+ tmp16 = *buf8++;
+ tmp16 |= (*buf8++) << 8;
+ iowrite16(tmp16, lp->virt_addr + portno);
+ } while (--length);
+}
+
+static u16
+readreg(struct net_device *dev, u16 regno)
+{
+ struct net_local *lp = netdev_priv(dev);
+
+ iowrite16(regno, lp->virt_addr + ADD_PORT);
+ return ioread16(lp->virt_addr + DATA_PORT);
+}
+
+static void
+writereg(struct net_device *dev, u16 regno, u16 value)
+{
+ struct net_local *lp = netdev_priv(dev);
+
+ iowrite16(regno, lp->virt_addr + ADD_PORT);
+ iowrite16(value, lp->virt_addr + DATA_PORT);
+}
+
+static int __init
+wait_eeprom_ready(struct net_device *dev)
+{
+ unsigned long timeout = jiffies;
+ /* check to see if the EEPROM is ready,
+ * a timeout is used just in case EEPROM is ready when
+ * SI_BUSY in the PP_SelfST is clear
+ */
+ while (readreg(dev, PP_SelfST) & SI_BUSY)
+ if (time_after_eq(jiffies, timeout + 40))
+ return -1;
+ return 0;
+}
+
+static int __init
+get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
+{
+ int i;
+
+ cs89_dbg(3, info, "EEPROM data from %x for %x:", off, len);
+ for (i = 0; i < len; i++) {
+ if (wait_eeprom_ready(dev) < 0)
+ return -1;
+ /* Now send the EEPROM read command and EEPROM location to read */
+ writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
+ if (wait_eeprom_ready(dev) < 0)
+ return -1;
+ buffer[i] = readreg(dev, PP_EEData);
+ cs89_dbg(3, cont, " %04x", buffer[i]);
+ }
+ cs89_dbg(3, cont, "\n");
+ return 0;
+}
+
+static int __init
+get_eeprom_cksum(int off, int len, int *buffer)
+{
+ int i, cksum;
+
+ cksum = 0;
+ for (i = 0; i < len; i++)
+ cksum += buffer[i];
+ cksum &= 0xffff;
+ if (cksum == 0)
+ return 0;
+ return -1;
+}
+
+static void
+write_irq(struct net_device *dev, int chip_type, int irq)
+{
+ int i;
+
+ if (chip_type == CS8900) {
+#ifndef CONFIG_CS89x0_PLATFORM
+ /* Search the mapping table for the corresponding IRQ pin. */
+ for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
+ if (cs8900_irq_map[i] == irq)
+ break;
+ /* Not found */
+ if (i == ARRAY_SIZE(cs8900_irq_map))
+ i = 3;
+#else
+ /* INTRQ0 pin is used for interrupt generation. */
+ i = 0;
+#endif
+ writereg(dev, PP_CS8900_ISAINT, i);
+ } else {
+ writereg(dev, PP_CS8920_ISAINT, irq);
+ }
+}
+
+static void
+count_rx_errors(int status, struct net_device *dev)
+{
+ dev->stats.rx_errors++;
+ if (status & RX_RUNT)
+ dev->stats.rx_length_errors++;
+ if (status & RX_EXTRA_DATA)
+ dev->stats.rx_length_errors++;
+ if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT)))
+ /* per str 172 */
+ dev->stats.rx_crc_errors++;
+ if (status & RX_DRIBBLE)
+ dev->stats.rx_frame_errors++;
+}
+
+/*********************************
+ * This page contains DMA routines
+ *********************************/
+
+#if ALLOW_DMA
+
+#define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17)
+
+static void
+get_dma_channel(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+
+ if (lp->dma) {
+ dev->dma = lp->dma;
+ lp->isa_config |= ISA_RxDMA;
+ } else {
+ if ((lp->isa_config & ANY_ISA_DMA) == 0)
+ return;
+ dev->dma = lp->isa_config & DMA_NO_MASK;
+ if (lp->chip_type == CS8900)
+ dev->dma += 5;
+ if (dev->dma < 5 || dev->dma > 7) {
+ lp->isa_config &= ~ANY_ISA_DMA;
+ return;
+ }
+ }
+}
+
+static void
+write_dma(struct net_device *dev, int chip_type, int dma)
+{
+ struct net_local *lp = netdev_priv(dev);
+ if ((lp->isa_config & ANY_ISA_DMA) == 0)
+ return;
+ if (chip_type == CS8900)
+ writereg(dev, PP_CS8900_ISADMA, dma - 5);
+ else
+ writereg(dev, PP_CS8920_ISADMA, dma);
+}
+
+static void
+set_dma_cfg(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+
+ if (lp->use_dma) {
+ if ((lp->isa_config & ANY_ISA_DMA) == 0) {
+ cs89_dbg(3, err, "set_dma_cfg(): no DMA\n");
+ return;
+ }
+ if (lp->isa_config & ISA_RxDMA) {
+ lp->curr_rx_cfg |= RX_DMA_ONLY;
+ cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n");
+ } else {
+ lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
+ cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n");
+ }
+ }
+}
+
+static int
+dma_bufcfg(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+ if (lp->use_dma)
+ return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0;
+ else
+ return 0;
+}
+
+static int
+dma_busctl(struct net_device *dev)
+{
+ int retval = 0;
+ struct net_local *lp = netdev_priv(dev);
+ if (lp->use_dma) {
+ if (lp->isa_config & ANY_ISA_DMA)
+ retval |= RESET_RX_DMA; /* Reset the DMA pointer */
+ if (lp->isa_config & DMA_BURST)
+ retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
+ if (lp->dmasize == 64)
+ retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
+ retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
+ }
+ return retval;
+}
+
+static void
+dma_rx(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+ struct sk_buff *skb;
+ int status, length;
+ unsigned char *bp = lp->rx_dma_ptr;
+
+ status = bp[0] + (bp[1] << 8);
+ length = bp[2] + (bp[3] << 8);
+ bp += 4;
+
+ cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n",
+ dev->name, (unsigned long)bp, status, length);
+
+ if ((status & RX_OK) == 0) {
+ count_rx_errors(status, dev);
+ goto skip_this_frame;
+ }
+
+ /* Malloc up new buffer. */
+ skb = netdev_alloc_skb(dev, length + 2);
+ if (skb == NULL) {
+ dev->stats.rx_dropped++;
+
+ /* AKPM: advance bp to the next frame */
+skip_this_frame:
+ bp += (length + 3) & ~3;
+ if (bp >= lp->end_dma_buff)
+ bp -= lp->dmasize * 1024;
+ lp->rx_dma_ptr = bp;
+ return;
+ }
+ skb_reserve(skb, 2); /* longword align L3 header */
+
+ if (bp + length > lp->end_dma_buff) {
+ int semi_cnt = lp->end_dma_buff - bp;
+ memcpy(skb_put(skb, semi_cnt), bp, semi_cnt);
+ memcpy(skb_put(skb, length - semi_cnt), lp->dma_buff,
+ length - semi_cnt);
+ } else {
+ memcpy(skb_put(skb, length), bp, length);
+ }
+ bp += (length + 3) & ~3;
+ if (bp >= lp->end_dma_buff)
+ bp -= lp->dmasize*1024;
+ lp->rx_dma_ptr = bp;
+
+ cs89_dbg(3, info, "%s: received %d byte DMA packet of type %x\n",
+ dev->name, length,
+ ((skb->data[ETH_ALEN + ETH_ALEN] << 8) |
+ skb->data[ETH_ALEN + ETH_ALEN + 1]));
+
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb);
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += length;
+}
+
+static void release_dma_buff(struct net_local *lp)
+{
+ if (lp->dma_buff) {
+ free_pages((unsigned long)(lp->dma_buff),
+ get_order(lp->dmasize * 1024));
+ lp->dma_buff = NULL;
+ }
+}
+
+#endif /* ALLOW_DMA */
+
+static void
+control_dc_dc(struct net_device *dev, int on_not_off)
+{
+ struct net_local *lp = netdev_priv(dev);
+ unsigned int selfcontrol;
+ unsigned long timenow = jiffies;
+ /* control the DC to DC convertor in the SelfControl register.
+ * Note: This is hooked up to a general purpose pin, might not
+ * always be a DC to DC convertor.
+ */
+
+ selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
+ if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
+ selfcontrol |= HCB1;
+ else
+ selfcontrol &= ~HCB1;
+ writereg(dev, PP_SelfCTL, selfcontrol);
+
+ /* Wait for the DC/DC converter to power up - 500ms */
+ while (time_before(jiffies, timenow + HZ))
+ ;
+}
+
+/* send a test packet - return true if carrier bits are ok */
+static int
+send_test_pkt(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+ char test_packet[] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 46, /* A 46 in network order */
+ 0, 0, /* DSAP=0 & SSAP=0 fields */
+ 0xf3, 0 /* Control (Test Req + P bit set) */
+ };
+ unsigned long timenow = jiffies;
+
+ writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
+
+ memcpy(test_packet, dev->dev_addr, ETH_ALEN);
+ memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN);
+
+ iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT);
+ iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT);
+
+ /* Test to see if the chip has allocated memory for the packet */
+ while (time_before(jiffies, timenow + 5))
+ if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
+ break;
+ if (time_after_eq(jiffies, timenow + 5))
+ return 0; /* this shouldn't happen */
+
+ /* Write the contents of the packet */
+ writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN + 1) >> 1);
+
+ cs89_dbg(1, debug, "Sending test packet ");
+ /* wait a couple of jiffies for packet to be received */
+ for (timenow = jiffies; time_before(jiffies, timenow + 3);)
+ ;
+ if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
+ cs89_dbg(1, cont, "succeeded\n");
+ return 1;
+ }
+ cs89_dbg(1, cont, "failed\n");
+ return 0;
+}
+
+#define DETECTED_NONE 0
+#define DETECTED_RJ45H 1
+#define DETECTED_RJ45F 2
+#define DETECTED_AUI 3
+#define DETECTED_BNC 4
+
+static int
+detect_tp(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+ unsigned long timenow = jiffies;
+ int fdx;
+
+ cs89_dbg(1, debug, "%s: Attempting TP\n", dev->name);
+
+ /* If connected to another full duplex capable 10-Base-T card
+ * the link pulses seem to be lost when the auto detect bit in
+ * the LineCTL is set. To overcome this the auto detect bit will
+ * be cleared whilst testing the 10-Base-T interface. This would
+ * not be necessary for the sparrow chip but is simpler to do it
+ * anyway.
+ */
+ writereg(dev, PP_LineCTL, lp->linectl & ~AUI_ONLY);
+ control_dc_dc(dev, 0);
+
+ /* Delay for the hardware to work out if the TP cable is present
+ * - 150ms
+ */
+ for (timenow = jiffies; time_before(jiffies, timenow + 15);)
+ ;
+ if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
+ return DETECTED_NONE;
+
+ if (lp->chip_type == CS8900) {
+ switch (lp->force & 0xf0) {
+#if 0
+ case FORCE_AUTO:
+ pr_info("%s: cs8900 doesn't autonegotiate\n",
+ dev->name);
+ return DETECTED_NONE;
+#endif
+ /* CS8900 doesn't support AUTO, change to HALF*/
+ case FORCE_AUTO:
+ lp->force &= ~FORCE_AUTO;
+ lp->force |= FORCE_HALF;
+ break;
+ case FORCE_HALF:
+ break;
+ case FORCE_FULL:
+ writereg(dev, PP_TestCTL,
+ readreg(dev, PP_TestCTL) | FDX_8900);
+ break;
+ }
+ fdx = readreg(dev, PP_TestCTL) & FDX_8900;
+ } else {
+ switch (lp->force & 0xf0) {
+ case FORCE_AUTO:
+ lp->auto_neg_cnf = AUTO_NEG_ENABLE;
+ break;
+ case FORCE_HALF:
+ lp->auto_neg_cnf = 0;
+ break;
+ case FORCE_FULL:
+ lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
+ break;
+ }
+
+ writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
+
+ if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
+ pr_info("%s: negotiating duplex...\n", dev->name);
+ while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
+ if (time_after(jiffies, timenow + 4000)) {
+ pr_err("**** Full / half duplex auto-negotiation timed out ****\n");
+ break;
+ }
+ }
+ }
+ fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
+ }
+ if (fdx)
+ return DETECTED_RJ45F;
+ else
+ return DETECTED_RJ45H;
+}
+
+static int
+detect_bnc(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+
+ cs89_dbg(1, debug, "%s: Attempting BNC\n", dev->name);
+ control_dc_dc(dev, 1);
+
+ writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);
+
+ if (send_test_pkt(dev))
+ return DETECTED_BNC;
+ else
+ return DETECTED_NONE;
+}
+
+static int
+detect_aui(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+
+ cs89_dbg(1, debug, "%s: Attempting AUI\n", dev->name);
+ control_dc_dc(dev, 0);
+
+ writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);
+
+ if (send_test_pkt(dev))
+ return DETECTED_AUI;
+ else
+ return DETECTED_NONE;
+}
+
+/* We have a good packet(s), get it/them out of the buffers. */
+static void
+net_rx(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+ struct sk_buff *skb;
+ int status, length;
+
+ status = ioread16(lp->virt_addr + RX_FRAME_PORT);
+ length = ioread16(lp->virt_addr + RX_FRAME_PORT);
+
+ if ((status & RX_OK) == 0) {
+ count_rx_errors(status, dev);
+ return;
+ }
+
+ /* Malloc up new buffer. */
+ skb = netdev_alloc_skb(dev, length + 2);
+ if (skb == NULL) {
+ dev->stats.rx_dropped++;
+ return;
+ }
+ skb_reserve(skb, 2); /* longword align L3 header */
+
+ readwords(lp, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
+ if (length & 1)
+ skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT);
+
+ cs89_dbg(3, debug, "%s: received %d byte packet of type %x\n",
+ dev->name, length,
+ (skb->data[ETH_ALEN + ETH_ALEN] << 8) |
+ skb->data[ETH_ALEN + ETH_ALEN + 1]);
+
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb);
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += length;
+}
+
+/* The typical workload of the driver:
+ * Handle the network interface interrupts.
+ */
+
+static irqreturn_t net_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct net_local *lp;
+ int status;
+ int handled = 0;
+
+ lp = netdev_priv(dev);
+
+ /* we MUST read all the events out of the ISQ, otherwise we'll never
+ * get interrupted again. As a consequence, we can't have any limit
+ * on the number of times we loop in the interrupt handler. The
+ * hardware guarantees that eventually we'll run out of events. Of
+ * course, if you're on a slow machine, and packets are arriving
+ * faster than you can read them off, you're screwed. Hasta la
+ * vista, baby!
+ */
+ while ((status = ioread16(lp->virt_addr + ISQ_PORT))) {
+ cs89_dbg(4, debug, "%s: event=%04x\n", dev->name, status);
+ handled = 1;
+ switch (status & ISQ_EVENT_MASK) {
+ case ISQ_RECEIVER_EVENT:
+ /* Got a packet(s). */
+ net_rx(dev);
+ break;
+ case ISQ_TRANSMITTER_EVENT:
+ dev->stats.tx_packets++;
+ netif_wake_queue(dev); /* Inform upper layers. */
+ if ((status & (TX_OK |
+ TX_LOST_CRS |
+ TX_SQE_ERROR |
+ TX_LATE_COL |
+ TX_16_COL)) != TX_OK) {
+ if ((status & TX_OK) == 0)
+ dev->stats.tx_errors++;
+ if (status & TX_LOST_CRS)
+ dev->stats.tx_carrier_errors++;
+ if (status & TX_SQE_ERROR)
+ dev->stats.tx_heartbeat_errors++;
+ if (status & TX_LATE_COL)
+ dev->stats.tx_window_errors++;
+ if (status & TX_16_COL)
+ dev->stats.tx_aborted_errors++;
+ }
+ break;
+ case ISQ_BUFFER_EVENT:
+ if (status & READY_FOR_TX) {
+ /* we tried to transmit a packet earlier,
+ * but inexplicably ran out of buffers.
+ * That shouldn't happen since we only ever
+ * load one packet. Shrug. Do the right
+ * thing anyway.
+ */
+ netif_wake_queue(dev); /* Inform upper layers. */
+ }
+ if (status & TX_UNDERRUN) {
+ cs89_dbg(0, err, "%s: transmit underrun\n",
+ dev->name);
+ lp->send_underrun++;
+ if (lp->send_underrun == 3)
+ lp->send_cmd = TX_AFTER_381;
+ else if (lp->send_underrun == 6)
+ lp->send_cmd = TX_AFTER_ALL;
+ /* transmit cycle is done, although
+ * frame wasn't transmitted - this
+ * avoids having to wait for the upper
+ * layers to timeout on us, in the
+ * event of a tx underrun
+ */
+ netif_wake_queue(dev); /* Inform upper layers. */
+ }
+#if ALLOW_DMA
+ if (lp->use_dma && (status & RX_DMA)) {
+ int count = readreg(dev, PP_DmaFrameCnt);
+ while (count) {
+ cs89_dbg(5, debug,
+ "%s: receiving %d DMA frames\n",
+ dev->name, count);
+ if (count > 1)
+ cs89_dbg(2, debug,
+ "%s: receiving %d DMA frames\n",
+ dev->name, count);
+ dma_rx(dev);
+ if (--count == 0)
+ count = readreg(dev, PP_DmaFrameCnt);
+ if (count > 0)
+ cs89_dbg(2, debug,
+ "%s: continuing with %d DMA frames\n",
+ dev->name, count);
+ }
+ }
+#endif
+ break;
+ case ISQ_RX_MISS_EVENT:
+ dev->stats.rx_missed_errors += (status >> 6);
+ break;
+ case ISQ_TX_COL_EVENT:
+ dev->stats.collisions += (status >> 6);
+ break;
+ }
+ }
+ return IRQ_RETVAL(handled);
+}
+
+/* Open/initialize the board. This is called (in the current kernel)
+ sometime after booting when the 'ifconfig' program is run.
+
+ This routine should set everything up anew at each open, even
+ registers that "should" only need to be set once at boot, so that
+ there is non-reboot way to recover if something goes wrong.
+*/
+
+/* AKPM: do we need to do any locking here? */
+
+static int
+net_open(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+ int result = 0;
+ int i;
+ int ret;
+
+ if (dev->irq < 2) {
+ /* Allow interrupts to be generated by the chip */
+/* Cirrus' release had this: */
+#if 0
+ writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);
+#endif
+/* And 2.3.47 had this: */
+ writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
+
+ for (i = 2; i < CS8920_NO_INTS; i++) {
+ if ((1 << i) & lp->irq_map) {
+ if (request_irq(i, net_interrupt, 0, dev->name,
+ dev) == 0) {
+ dev->irq = i;
+ write_irq(dev, lp->chip_type, i);
+ /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
+ break;
+ }
+ }
+ }
+
+ if (i >= CS8920_NO_INTS) {
+ writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
+ pr_err("can't get an interrupt\n");
+ ret = -EAGAIN;
+ goto bad_out;
+ }
+ } else {
+#if !defined(CONFIG_CS89x0_PLATFORM)
+ if (((1 << dev->irq) & lp->irq_map) == 0) {
+ pr_err("%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
+ dev->name, dev->irq, lp->irq_map);
+ ret = -EAGAIN;
+ goto bad_out;
+ }
+#endif
+/* FIXME: Cirrus' release had this: */
+ writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ);
+/* And 2.3.47 had this: */
+#if 0
+ writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
+#endif
+ write_irq(dev, lp->chip_type, dev->irq);
+ ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev);
+ if (ret) {
+ pr_err("request_irq(%d) failed\n", dev->irq);
+ goto bad_out;
+ }
+ }
+
+#if ALLOW_DMA
+ if (lp->use_dma && (lp->isa_config & ANY_ISA_DMA)) {
+ unsigned long flags;
+ lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
+ get_order(lp->dmasize * 1024));
+ if (!lp->dma_buff) {
+ pr_err("%s: cannot get %dK memory for DMA\n",
+ dev->name, lp->dmasize);
+ goto release_irq;
+ }
+ cs89_dbg(1, debug, "%s: dma %lx %lx\n",
+ dev->name,
+ (unsigned long)lp->dma_buff,
+ (unsigned long)isa_virt_to_bus(lp->dma_buff));
+ if ((unsigned long)lp->dma_buff >= MAX_DMA_ADDRESS ||
+ !dma_page_eq(lp->dma_buff,
+ lp->dma_buff + lp->dmasize * 1024 - 1)) {
+ pr_err("%s: not usable as DMA buffer\n", dev->name);
+ goto release_irq;
+ }
+ memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
+ if (request_dma(dev->dma, dev->name)) {
+ pr_err("%s: cannot get dma channel %d\n",
+ dev->name, dev->dma);
+ goto release_irq;
+ }
+ write_dma(dev, lp->chip_type, dev->dma);
+ lp->rx_dma_ptr = lp->dma_buff;
+ lp->end_dma_buff = lp->dma_buff + lp->dmasize * 1024;
+ spin_lock_irqsave(&lp->lock, flags);
+ disable_dma(dev->dma);
+ clear_dma_ff(dev->dma);
+ set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */
+ set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
+ set_dma_count(dev->dma, lp->dmasize * 1024);
+ enable_dma(dev->dma);
+ spin_unlock_irqrestore(&lp->lock, flags);
+ }
+#endif /* ALLOW_DMA */
+
+ /* set the Ethernet address */
+ for (i = 0; i < ETH_ALEN / 2; i++)
+ writereg(dev, PP_IA + i * 2,
+ (dev->dev_addr[i * 2] |
+ (dev->dev_addr[i * 2 + 1] << 8)));
+
+ /* while we're testing the interface, leave interrupts disabled */
+ writereg(dev, PP_BusCTL, MEMORY_ON);
+
+ /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
+ if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) &&
+ (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
+ lp->linectl = LOW_RX_SQUELCH;
+ else
+ lp->linectl = 0;
+
+ /* check to make sure that they have the "right" hardware available */
+ switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
+ case A_CNF_MEDIA_10B_T:
+ result = lp->adapter_cnf & A_CNF_10B_T;
+ break;
+ case A_CNF_MEDIA_AUI:
+ result = lp->adapter_cnf & A_CNF_AUI;
+ break;
+ case A_CNF_MEDIA_10B_2:
+ result = lp->adapter_cnf & A_CNF_10B_2;
+ break;
+ default:
+ result = lp->adapter_cnf & (A_CNF_10B_T |
+ A_CNF_AUI |
+ A_CNF_10B_2);
+ }
+ if (!result) {
+ pr_err("%s: EEPROM is configured for unavailable media\n",
+ dev->name);
+release_dma:
+#if ALLOW_DMA
+ free_dma(dev->dma);
+release_irq:
+ release_dma_buff(lp);
+#endif
+ writereg(dev, PP_LineCTL,
+ readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
+ free_irq(dev->irq, dev);
+ ret = -EAGAIN;
+ goto bad_out;
+ }
+
+ /* set the hardware to the configured choice */
+ switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
+ case A_CNF_MEDIA_10B_T:
+ result = detect_tp(dev);
+ if (result == DETECTED_NONE) {
+ pr_warn("%s: 10Base-T (RJ-45) has no cable\n",
+ dev->name);
+ if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
+ result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
+ }
+ break;
+ case A_CNF_MEDIA_AUI:
+ result = detect_aui(dev);
+ if (result == DETECTED_NONE) {
+ pr_warn("%s: 10Base-5 (AUI) has no cable\n", dev->name);
+ if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
+ result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
+ }
+ break;
+ case A_CNF_MEDIA_10B_2:
+ result = detect_bnc(dev);
+ if (result == DETECTED_NONE) {
+ pr_warn("%s: 10Base-2 (BNC) has no cable\n", dev->name);
+ if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
+ result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
+ }
+ break;
+ case A_CNF_MEDIA_AUTO:
+ writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
+ if (lp->adapter_cnf & A_CNF_10B_T) {
+ result = detect_tp(dev);
+ if (result != DETECTED_NONE)
+ break;
+ }
+ if (lp->adapter_cnf & A_CNF_AUI) {
+ result = detect_aui(dev);
+ if (result != DETECTED_NONE)
+ break;
+ }
+ if (lp->adapter_cnf & A_CNF_10B_2) {
+ result = detect_bnc(dev);
+ if (result != DETECTED_NONE)
+ break;
+ }
+ pr_err("%s: no media detected\n", dev->name);
+ goto release_dma;
+ }
+ switch (result) {
+ case DETECTED_NONE:
+ pr_err("%s: no network cable attached to configured media\n",
+ dev->name);
+ goto release_dma;
+ case DETECTED_RJ45H:
+ pr_info("%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
+ break;
+ case DETECTED_RJ45F:
+ pr_info("%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
+ break;
+ case DETECTED_AUI:
+ pr_info("%s: using 10Base-5 (AUI)\n", dev->name);
+ break;
+ case DETECTED_BNC:
+ pr_info("%s: using 10Base-2 (BNC)\n", dev->name);
+ break;
+ }
+
+ /* Turn on both receive and transmit operations */
+ writereg(dev, PP_LineCTL,
+ readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
+
+ /* Receive only error free packets addressed to this card */
+ lp->rx_mode = 0;
+ writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
+
+ lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
+
+ if (lp->isa_config & STREAM_TRANSFER)
+ lp->curr_rx_cfg |= RX_STREAM_ENBL;
+#if ALLOW_DMA
+ set_dma_cfg(dev);
+#endif
+ writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
+
+ writereg(dev, PP_TxCFG, (TX_LOST_CRS_ENBL |
+ TX_SQE_ERROR_ENBL |
+ TX_OK_ENBL |
+ TX_LATE_COL_ENBL |
+ TX_JBR_ENBL |
+ TX_ANY_COL_ENBL |
+ TX_16_COL_ENBL));
+
+ writereg(dev, PP_BufCFG, (READY_FOR_TX_ENBL |
+ RX_MISS_COUNT_OVRFLOW_ENBL |
+#if ALLOW_DMA
+ dma_bufcfg(dev) |
+#endif
+ TX_COL_COUNT_OVRFLOW_ENBL |
+ TX_UNDERRUN_ENBL));
+
+ /* now that we've got our act together, enable everything */
+ writereg(dev, PP_BusCTL, (ENABLE_IRQ
+ | (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */
+#if ALLOW_DMA
+ | dma_busctl(dev)
+#endif
+ ));
+ netif_start_queue(dev);
+ cs89_dbg(1, debug, "net_open() succeeded\n");
+ return 0;
+bad_out:
+ return ret;
+}
+
+/* The inverse routine to net_open(). */
+static int
+net_close(struct net_device *dev)
+{
+#if ALLOW_DMA
+ struct net_local *lp = netdev_priv(dev);
+#endif
+
+ netif_stop_queue(dev);
+
+ writereg(dev, PP_RxCFG, 0);
+ writereg(dev, PP_TxCFG, 0);
+ writereg(dev, PP_BufCFG, 0);
+ writereg(dev, PP_BusCTL, 0);
+
+ free_irq(dev->irq, dev);
+
+#if ALLOW_DMA
+ if (lp->use_dma && lp->dma) {
+ free_dma(dev->dma);
+ release_dma_buff(lp);
+ }
+#endif
+
+ /* Update the statistics here. */
+ return 0;
+}
+
+/* Get the current statistics.
+ * This may be called with the card open or closed.
+ */
+static struct net_device_stats *
+net_get_stats(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&lp->lock, flags);
+ /* Update the statistics from the device registers. */
+ dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
+ dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
+ spin_unlock_irqrestore(&lp->lock, flags);
+
+ return &dev->stats;
+}
+
+static void net_timeout(struct net_device *dev)
+{
+ /* If we get here, some higher level has decided we are broken.
+ There should really be a "kick me" function call instead. */
+ cs89_dbg(0, err, "%s: transmit timed out, %s?\n",
+ dev->name,
+ tx_done(dev) ? "IRQ conflict" : "network cable problem");
+ /* Try to restart the adaptor. */
+ netif_wake_queue(dev);
+}
+
+static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+ unsigned long flags;
+
+ cs89_dbg(3, debug, "%s: sent %d byte packet of type %x\n",
+ dev->name, skb->len,
+ ((skb->data[ETH_ALEN + ETH_ALEN] << 8) |
+ skb->data[ETH_ALEN + ETH_ALEN + 1]));
+
+ /* keep the upload from being interrupted, since we
+ * ask the chip to start transmitting before the
+ * whole packet has been completely uploaded.
+ */
+
+ spin_lock_irqsave(&lp->lock, flags);
+ netif_stop_queue(dev);
+
+ /* initiate a transmit sequence */
+ iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT);
+ iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT);
+
+ /* Test to see if the chip has allocated memory for the packet */
+ if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
+ /* Gasp! It hasn't. But that shouldn't happen since
+ * we're waiting for TxOk, so return 1 and requeue this packet.
+ */
+
+ spin_unlock_irqrestore(&lp->lock, flags);
+ cs89_dbg(0, err, "Tx buffer not free!\n");
+ return NETDEV_TX_BUSY;
+ }
+ /* Write the contents of the packet */
+ writewords(lp, TX_FRAME_PORT, skb->data, (skb->len + 1) >> 1);
+ spin_unlock_irqrestore(&lp->lock, flags);
+ dev->stats.tx_bytes += skb->len;
+ dev_consume_skb_any(skb);
+
+ /* We DO NOT call netif_wake_queue() here.
+ * We also DO NOT call netif_start_queue().
+ *
+ * Either of these would cause another bottom half run through
+ * net_send_packet() before this packet has fully gone out.
+ * That causes us to hit the "Gasp!" above and the send is rescheduled.
+ * it runs like a dog. We just return and wait for the Tx completion
+ * interrupt handler to restart the netdevice layer
+ */
+
+ return NETDEV_TX_OK;
+}
+
+static void set_multicast_list(struct net_device *dev)
+{
+ struct net_local *lp = netdev_priv(dev);
+ unsigned long flags;
+ u16 cfg;
+
+ spin_lock_irqsave(&lp->lock, flags);
+ if (dev->flags & IFF_PROMISC)
+ lp->rx_mode = RX_ALL_ACCEPT;
+ else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
+ /* The multicast-accept list is initialized to accept-all,
+ * and we rely on higher-level filtering for now.
+ */
+ lp->rx_mode = RX_MULTCAST_ACCEPT;
+ else
+ lp->rx_mode = 0;
+
+ writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
+
+ /* in promiscuous mode, we accept errored packets,
+ * so we have to enable interrupts on them also
+ */
+ cfg = lp->curr_rx_cfg;
+ if (lp->rx_mode == RX_ALL_ACCEPT)
+ cfg |= RX_CRC_ERROR_ENBL | RX_RUNT_ENBL | RX_EXTRA_DATA_ENBL;
+ writereg(dev, PP_RxCFG, cfg);
+ spin_unlock_irqrestore(&lp->lock, flags);
+}
+
+static int set_mac_address(struct net_device *dev, void *p)
+{
+ int i;
+ struct sockaddr *addr = p;
+
+ if (netif_running(dev))
+ return -EBUSY;
+
+ memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
+
+ cs89_dbg(0, debug, "%s: Setting MAC address to %pM\n",
+ dev->name, dev->dev_addr);
+
+ /* set the Ethernet address */
+ for (i = 0; i < ETH_ALEN / 2; i++)
+ writereg(dev, PP_IA + i * 2,
+ (dev->dev_addr[i * 2] |
+ (dev->dev_addr[i * 2 + 1] << 8)));
+
+ return 0;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling receive - used by netconsole and other diagnostic tools
+ * to allow network i/o with interrupts disabled.
+ */
+static void net_poll_controller(struct net_device *dev)
+{
+ disable_irq(dev->irq);
+ net_interrupt(dev->irq, dev);
+ enable_irq(dev->irq);
+}
+#endif
+
+static const struct net_device_ops net_ops = {
+ .ndo_open = net_open,
+ .ndo_stop = net_close,
+ .ndo_tx_timeout = net_timeout,
+ .ndo_start_xmit = net_send_packet,
+ .ndo_get_stats = net_get_stats,
+ .ndo_set_rx_mode = set_multicast_list,
+ .ndo_set_mac_address = set_mac_address,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = net_poll_controller,
+#endif
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static void __init reset_chip(struct net_device *dev)
+{
+#if !defined(CONFIG_MACH_MX31ADS)
+ struct net_local *lp = netdev_priv(dev);
+ unsigned long reset_start_time;
+
+ writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
+
+ /* wait 30 ms */
+ msleep(30);
+
+ if (lp->chip_type != CS8900) {
+ /* Hardware problem requires PNP registers to be reconfigured after a reset */
+ iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT);
+ iowrite8(dev->irq, lp->virt_addr + DATA_PORT);
+ iowrite8(0, lp->virt_addr + DATA_PORT + 1);
+
+ iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT);
+ iowrite8((dev->mem_start >> 16) & 0xff,
+ lp->virt_addr + DATA_PORT);
+ iowrite8((dev->mem_start >> 8) & 0xff,
+ lp->virt_addr + DATA_PORT + 1);
+ }
+
+ /* Wait until the chip is reset */
+ reset_start_time = jiffies;
+ while ((readreg(dev, PP_SelfST) & INIT_DONE) == 0 &&
+ time_before(jiffies, reset_start_time + 2))
+ ;
+#endif /* !CONFIG_MACH_MX31ADS */
+}
+
+/* This is the real probe routine.
+ * Linux has a history of friendly device probes on the ISA bus.
+ * A good device probes avoids doing writes, and
+ * verifies that the correct device exists and functions.
+ * Return 0 on success.
+ */
+static int __init
+cs89x0_probe1(struct net_device *dev, void __iomem *ioaddr, int modular)
+{
+ struct net_local *lp = netdev_priv(dev);
+ int i;
+ int tmp;
+ unsigned rev_type = 0;
+ int eeprom_buff[CHKSUM_LEN];
+ int retval;
+
+ /* Initialize the device structure. */
+ if (!modular) {
+ memset(lp, 0, sizeof(*lp));
+ spin_lock_init(&lp->lock);
+#ifndef MODULE
+#if ALLOW_DMA
+ if (g_cs89x0_dma) {
+ lp->use_dma = 1;
+ lp->dma = g_cs89x0_dma;
+ lp->dmasize = 16; /* Could make this an option... */
+ }
+#endif
+ lp->force = g_cs89x0_media__force;
+#endif
+ }
+
+ pr_debug("PP_addr at %p[%x]: 0x%x\n",
+ ioaddr, ADD_PORT, ioread16(ioaddr + ADD_PORT));
+ iowrite16(PP_ChipID, ioaddr + ADD_PORT);
+
+ tmp = ioread16(ioaddr + DATA_PORT);
+ if (tmp != CHIP_EISA_ID_SIG) {
+ pr_debug("%s: incorrect signature at %p[%x]: 0x%x!="
+ CHIP_EISA_ID_SIG_STR "\n",
+ dev->name, ioaddr, DATA_PORT, tmp);
+ retval = -ENODEV;
+ goto out1;
+ }
+
+ lp->virt_addr = ioaddr;
+
+ /* get the chip type */
+ rev_type = readreg(dev, PRODUCT_ID_ADD);
+ lp->chip_type = rev_type & ~REVISON_BITS;
+ lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
+
+ /* Check the chip type and revision in order to set the correct
+ * send command. CS8920 revision C and CS8900 revision F can use
+ * the faster send.
+ */
+ lp->send_cmd = TX_AFTER_381;
+ if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
+ lp->send_cmd = TX_NOW;
+ if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
+ lp->send_cmd = TX_NOW;
+
+ pr_info_once("%s\n", version);
+
+ pr_info("%s: cs89%c0%s rev %c found at %p ",
+ dev->name,
+ lp->chip_type == CS8900 ? '0' : '2',
+ lp->chip_type == CS8920M ? "M" : "",
+ lp->chip_revision,
+ lp->virt_addr);
+
+ reset_chip(dev);
+
+ /* Here we read the current configuration of the chip.
+ * If there is no Extended EEPROM then the idea is to not disturb
+ * the chip configuration, it should have been correctly setup by
+ * automatic EEPROM read on reset. So, if the chip says it read
+ * the EEPROM the driver will always do *something* instead of
+ * complain that adapter_cnf is 0.
+ */
+
+ if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
+ (EEPROM_OK | EEPROM_PRESENT)) {
+ /* Load the MAC. */
+ for (i = 0; i < ETH_ALEN / 2; i++) {
+ unsigned int Addr;
+ Addr = readreg(dev, PP_IA + i * 2);
+ dev->dev_addr[i * 2] = Addr & 0xFF;
+ dev->dev_addr[i * 2 + 1] = Addr >> 8;
+ }
+
+ /* Load the Adapter Configuration.
+ * Note: Barring any more specific information from some
+ * other source (ie EEPROM+Schematics), we would not know
+ * how to operate a 10Base2 interface on the AUI port.
+ * However, since we do read the status of HCB1 and use
+ * settings that always result in calls to control_dc_dc(dev,0)
+ * a BNC interface should work if the enable pin
+ * (dc/dc converter) is on HCB1.
+ * It will be called AUI however.
+ */
+
+ lp->adapter_cnf = 0;
+ i = readreg(dev, PP_LineCTL);
+ /* Preserve the setting of the HCB1 pin. */
+ if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
+ lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
+ /* Save the sqelch bit */
+ if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
+ lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
+ /* Check if the card is in 10Base-t only mode */
+ if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
+ lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
+ /* Check if the card is in AUI only mode */
+ if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
+ lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
+ /* Check if the card is in Auto mode. */
+ if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
+ lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
+ A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
+
+ cs89_dbg(1, info, "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
+ dev->name, i, lp->adapter_cnf);
+
+ /* IRQ. Other chips already probe, see below. */
+ if (lp->chip_type == CS8900)
+ lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
+
+ pr_cont("[Cirrus EEPROM] ");
+ }
+
+ pr_cont("\n");
+
+ /* First check to see if an EEPROM is attached. */
+
+ if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
+ pr_warn("No EEPROM, relying on command line....\n");
+ else if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) {
+ pr_warn("EEPROM read failed, relying on command line\n");
+ } else if (get_eeprom_cksum(START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) {
+ /* Check if the chip was able to read its own configuration starting
+ at 0 in the EEPROM*/
+ if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
+ (EEPROM_OK | EEPROM_PRESENT))
+ pr_warn("Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
+
+ } else {
+ /* This reads an extended EEPROM that is not documented
+ * in the CS8900 datasheet.
+ */
+
+ /* get transmission control word but keep the autonegotiation bits */
+ if (!lp->auto_neg_cnf)
+ lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET / 2];
+ /* Store adapter configuration */
+ if (!lp->adapter_cnf)
+ lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET / 2];
+ /* Store ISA configuration */
+ lp->isa_config = eeprom_buff[ISA_CNF_OFFSET / 2];
+ dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET / 2] << 8;
+
+ /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
+ /* store the initial memory base address */
+ for (i = 0; i < ETH_ALEN / 2; i++) {
+ dev->dev_addr[i * 2] = eeprom_buff[i];
+ dev->dev_addr[i * 2 + 1] = eeprom_buff[i] >> 8;
+ }
+ cs89_dbg(1, debug, "%s: new adapter_cnf: 0x%x\n",
+ dev->name, lp->adapter_cnf);
+ }
+
+ /* allow them to force multiple transceivers. If they force multiple, autosense */
+ {
+ int count = 0;
+ if (lp->force & FORCE_RJ45) {
+ lp->adapter_cnf |= A_CNF_10B_T;
+ count++;
+ }
+ if (lp->force & FORCE_AUI) {
+ lp->adapter_cnf |= A_CNF_AUI;
+ count++;
+ }
+ if (lp->force & FORCE_BNC) {
+ lp->adapter_cnf |= A_CNF_10B_2;
+ count++;
+ }
+ if (count > 1)
+ lp->adapter_cnf |= A_CNF_MEDIA_AUTO;
+ else if (lp->force & FORCE_RJ45)
+ lp->adapter_cnf |= A_CNF_MEDIA_10B_T;
+ else if (lp->force & FORCE_AUI)
+ lp->adapter_cnf |= A_CNF_MEDIA_AUI;
+ else if (lp->force & FORCE_BNC)
+ lp->adapter_cnf |= A_CNF_MEDIA_10B_2;
+ }
+
+ cs89_dbg(1, debug, "%s: after force 0x%x, adapter_cnf=0x%x\n",
+ dev->name, lp->force, lp->adapter_cnf);
+
+ /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
+
+ /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
+
+ /* FIXME: we don't set the Ethernet address on the command line. Use
+ * ifconfig IFACE hw ether AABBCCDDEEFF
+ */
+
+ pr_info("media %s%s%s",
+ (lp->adapter_cnf & A_CNF_10B_T) ? "RJ-45," : "",
+ (lp->adapter_cnf & A_CNF_AUI) ? "AUI," : "",
+ (lp->adapter_cnf & A_CNF_10B_2) ? "BNC," : "");
+
+ lp->irq_map = 0xffff;
+
+ /* If this is a CS8900 then no pnp soft */
+ if (lp->chip_type != CS8900 &&
+ /* Check if the ISA IRQ has been set */
+ (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
+ (i != 0 && i < CS8920_NO_INTS))) {
+ if (!dev->irq)
+ dev->irq = i;
+ } else {
+ i = lp->isa_config & INT_NO_MASK;
+#ifndef CONFIG_CS89x0_PLATFORM
+ if (lp->chip_type == CS8900) {
+ /* Translate the IRQ using the IRQ mapping table. */
+ if (i >= ARRAY_SIZE(cs8900_irq_map))
+ pr_err("invalid ISA interrupt number %d\n", i);
+ else
+ i = cs8900_irq_map[i];
+
+ lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
+ } else {
+ int irq_map_buff[IRQ_MAP_LEN/2];
+
+ if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
+ IRQ_MAP_LEN / 2,
+ irq_map_buff) >= 0) {
+ if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
+ lp->irq_map = ((irq_map_buff[0] >> 8) |
+ (irq_map_buff[1] << 8));
+ }
+ }
+#endif
+ if (!dev->irq)
+ dev->irq = i;
+ }
+
+ pr_cont(" IRQ %d", dev->irq);
+
+#if ALLOW_DMA
+ if (lp->use_dma) {
+ get_dma_channel(dev);
+ pr_cont(", DMA %d", dev->dma);
+ } else
+#endif
+ pr_cont(", programmed I/O");
+
+ /* print the ethernet address. */
+ pr_cont(", MAC %pM\n", dev->dev_addr);
+
+ dev->netdev_ops = &net_ops;
+ dev->watchdog_timeo = HZ;
+
+ cs89_dbg(0, info, "cs89x0_probe1() successful\n");
+
+ retval = register_netdev(dev);
+ if (retval)
+ goto out2;
+ return 0;
+out2:
+ iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);
+out1:
+ return retval;
+}
+
+#ifndef CONFIG_CS89x0_PLATFORM
+/*
+ * This function converts the I/O port address used by the cs89x0_probe() and
+ * init_module() functions to the I/O memory address used by the
+ * cs89x0_probe1() function.
+ */
+static int __init
+cs89x0_ioport_probe(struct net_device *dev, unsigned long ioport, int modular)
+{
+ struct net_local *lp = netdev_priv(dev);
+ int ret;
+ void __iomem *io_mem;
+
+ if (!lp)
+ return -ENOMEM;
+
+ dev->base_addr = ioport;
+
+ if (!request_region(ioport, NETCARD_IO_EXTENT, DRV_NAME)) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ io_mem = ioport_map(ioport & ~3, NETCARD_IO_EXTENT);
+ if (!io_mem) {
+ ret = -ENOMEM;
+ goto release;
+ }
+
+ /* if they give us an odd I/O address, then do ONE write to
+ * the address port, to get it back to address zero, where we
+ * expect to find the EISA signature word. An IO with a base of 0x3
+ * will skip the test for the ADD_PORT.
+ */
+ if (ioport & 1) {
+ cs89_dbg(1, info, "%s: odd ioaddr 0x%lx\n", dev->name, ioport);
+ if ((ioport & 2) != 2) {
+ if ((ioread16(io_mem + ADD_PORT) & ADD_MASK) !=
+ ADD_SIG) {
+ pr_err("%s: bad signature 0x%x\n",
+ dev->name, ioread16(io_mem + ADD_PORT));
+ ret = -ENODEV;
+ goto unmap;
+ }
+ }
+ }
+
+ ret = cs89x0_probe1(dev, io_mem, modular);
+ if (!ret)
+ goto out;
+unmap:
+ ioport_unmap(io_mem);
+release:
+ release_region(ioport, NETCARD_IO_EXTENT);
+out:
+ return ret;
+}
+
+#ifndef MODULE
+/* Check for a network adaptor of this type, and return '0' iff one exists.
+ * If dev->base_addr == 0, probe all likely locations.
+ * If dev->base_addr == 1, always return failure.
+ * If dev->base_addr == 2, allocate space for the device and return success
+ * (detachable devices only).
+ * Return 0 on success.
+ */
+
+struct net_device * __init cs89x0_probe(int unit)
+{
+ struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
+ unsigned *port;
+ int err = 0;
+ int irq;
+ int io;
+
+ if (!dev)
+ return ERR_PTR(-ENODEV);
+
+ sprintf(dev->name, "eth%d", unit);
+ netdev_boot_setup_check(dev);
+ io = dev->base_addr;
+ irq = dev->irq;
+
+ cs89_dbg(0, info, "cs89x0_probe(0x%x)\n", io);
+
+ if (io > 0x1ff) { /* Check a single specified location. */
+ err = cs89x0_ioport_probe(dev, io, 0);
+ } else if (io != 0) { /* Don't probe at all. */
+ err = -ENXIO;
+ } else {
+ for (port = netcard_portlist; *port; port++) {
+ if (cs89x0_ioport_probe(dev, *port, 0) == 0)
+ break;
+ dev->irq = irq;
+ }
+ if (!*port)
+ err = -ENODEV;
+ }
+ if (err)
+ goto out;
+ return dev;
+out:
+ free_netdev(dev);
+ pr_warn("no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
+ return ERR_PTR(err);
+}
+#endif
+#endif
+
+#if defined(MODULE) && !defined(CONFIG_CS89x0_PLATFORM)
+
+static struct net_device *dev_cs89x0;
+
+/* Support the 'debug' module parm even if we're compiled for non-debug to
+ * avoid breaking someone's startup scripts
+ */
+
+static int io;
+static int irq;
+static int debug;
+static char media[8];
+static int duplex = -1;
+
+static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
+static int dma;
+static int dmasize = 16; /* or 64 */
+
+module_param(io, int, 0);
+module_param(irq, int, 0);
+module_param(debug, int, 0);
+module_param_string(media, media, sizeof(media), 0);
+module_param(duplex, int, 0);
+module_param(dma , int, 0);
+module_param(dmasize , int, 0);
+module_param(use_dma , int, 0);
+MODULE_PARM_DESC(io, "cs89x0 I/O base address");
+MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
+#if DEBUGGING
+MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
+#else
+MODULE_PARM_DESC(debug, "(ignored)");
+#endif
+MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
+/* No other value than -1 for duplex seems to be currently interpreted */
+MODULE_PARM_DESC(duplex, "(ignored)");
+#if ALLOW_DMA
+MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
+MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
+MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
+#else
+MODULE_PARM_DESC(dma , "(ignored)");
+MODULE_PARM_DESC(dmasize , "(ignored)");
+MODULE_PARM_DESC(use_dma , "(ignored)");
+#endif
+
+MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton");
+MODULE_LICENSE("GPL");
+
+/*
+ * media=t - specify media type
+ * or media=2
+ * or media=aui
+ * or medai=auto
+ * duplex=0 - specify forced half/full/autonegotiate duplex
+ * debug=# - debug level
+ *
+ * Default Chip Configuration:
+ * DMA Burst = enabled
+ * IOCHRDY Enabled = enabled
+ * UseSA = enabled
+ * CS8900 defaults to half-duplex if not specified on command-line
+ * CS8920 defaults to autoneg if not specified on command-line
+ * Use reset defaults for other config parameters
+ *
+ * Assumptions:
+ * media type specified is supported (circuitry is present)
+ * if memory address is > 1MB, then required mem decode hw is present
+ * if 10B-2, then agent other than driver will enable DC/DC converter
+ * (hw or software util)
+ */
+
+int __init init_module(void)
+{
+ struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
+ struct net_local *lp;
+ int ret = 0;
+
+#if DEBUGGING
+ net_debug = debug;
+#else
+ debug = 0;
+#endif
+ if (!dev)
+ return -ENOMEM;
+
+ dev->irq = irq;
+ dev->base_addr = io;
+ lp = netdev_priv(dev);
+
+#if ALLOW_DMA
+ if (use_dma) {
+ lp->use_dma = use_dma;
+ lp->dma = dma;
+ lp->dmasize = dmasize;
+ }
+#endif
+
+ spin_lock_init(&lp->lock);
+
+ /* boy, they'd better get these right */
+ if (!strcmp(media, "rj45"))
+ lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
+ else if (!strcmp(media, "aui"))
+ lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
+ else if (!strcmp(media, "bnc"))
+ lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
+ else
+ lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
+
+ if (duplex == -1)
+ lp->auto_neg_cnf = AUTO_NEG_ENABLE;
+
+ if (io == 0) {
+ pr_err("Module autoprobing not allowed\n");
+ pr_err("Append io=0xNNN\n");
+ ret = -EPERM;
+ goto out;
+ } else if (io <= 0x1ff) {
+ ret = -ENXIO;
+ goto out;
+ }
+
+#if ALLOW_DMA
+ if (use_dma && dmasize != 16 && dmasize != 64) {
+ pr_err("dma size must be either 16K or 64K, not %dK\n",
+ dmasize);
+ ret = -EPERM;
+ goto out;
+ }
+#endif
+ ret = cs89x0_ioport_probe(dev, io, 1);
+ if (ret)
+ goto out;
+
+ dev_cs89x0 = dev;
+ return 0;
+out:
+ free_netdev(dev);
+ return ret;
+}
+
+void __exit
+cleanup_module(void)
+{
+ struct net_local *lp = netdev_priv(dev_cs89x0);
+
+ unregister_netdev(dev_cs89x0);
+ iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);
+ ioport_unmap(lp->virt_addr);
+ release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
+ free_netdev(dev_cs89x0);
+}
+#endif /* MODULE && !CONFIG_CS89x0_PLATFORM */
+
+#ifdef CONFIG_CS89x0_PLATFORM
+static int __init cs89x0_platform_probe(struct platform_device *pdev)
+{
+ struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
+ struct net_local *lp;
+ struct resource *mem_res;
+ void __iomem *virt_addr;
+ int err;
+
+ if (!dev)
+ return -ENOMEM;
+
+ lp = netdev_priv(dev);
+
+ dev->irq = platform_get_irq(pdev, 0);
+ if (dev->irq <= 0) {
+ dev_warn(&dev->dev, "interrupt resource missing\n");
+ err = -ENXIO;
+ goto free;
+ }
+
+ mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ virt_addr = devm_ioremap_resource(&pdev->dev, mem_res);
+ if (IS_ERR(virt_addr)) {
+ err = PTR_ERR(virt_addr);
+ goto free;
+ }
+
+ err = cs89x0_probe1(dev, virt_addr, 0);
+ if (err) {
+ dev_warn(&dev->dev, "no cs8900 or cs8920 detected\n");
+ goto free;
+ }
+
+ platform_set_drvdata(pdev, dev);
+ return 0;
+
+free:
+ free_netdev(dev);
+ return err;
+}
+
+static int cs89x0_platform_remove(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+
+ /* This platform_get_resource() call will not return NULL, because
+ * the same call in cs89x0_platform_probe() has returned a non NULL
+ * value.
+ */
+ unregister_netdev(dev);
+ free_netdev(dev);
+ return 0;
+}
+
+static struct platform_driver cs89x0_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ },
+ .remove = cs89x0_platform_remove,
+};
+
+module_platform_driver_probe(cs89x0_driver, cs89x0_platform_probe);
+
+#endif /* CONFIG_CS89x0_PLATFORM */
Code Review / kvmfornfv.git / blobdiff