--- /dev/null
+/*
+ * Cirrus Logic CS8900A Ethernet
+ *
+ * (C) 2009 Ben Warren , biggerbadderben@gmail.com
+ * Converted to use CONFIG_NET_MULTI API
+ *
+ * (C) 2003 Wolfgang Denk, wd@denx.de
+ * Extension to synchronize ethaddr environment variable
+ * against value in EEPROM
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * Copyright (C) 1999 Ben Williamson <benw@pobox.com>
+ *
+ * This program is loaded into SRAM in bootstrap mode, where it waits
+ * for commands on UART1 to read and write memory, jump to code etc.
+ * A design goal for this program is to be entirely independent of the
+ * target board. Anything with a CL-PS7111 or EP7211 should be able to run
+ * this code in bootstrap mode. All the board specifics can be handled on
+ * the host.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/io.h>
+#include <net.h>
+#include <malloc.h>
+#include "cs8900.h"
+
+#undef DEBUG
+
+/* packet page register access functions */
+
+#ifdef CONFIG_CS8900_BUS32
+
+#define REG_WRITE(v, a) writel((v),(a))
+#define REG_READ(a) readl((a))
+
+/* we don't need 16 bit initialisation on 32 bit bus */
+#define get_reg_init_bus(r,d) get_reg((r),(d))
+
+#else
+
+#define REG_WRITE(v, a) writew((v),(a))
+#define REG_READ(a) readw((a))
+
+static u16 get_reg_init_bus(struct eth_device *dev, int regno)
+{
+ /* force 16 bit busmode */
+ struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
+ uint8_t volatile * const iob = (uint8_t volatile * const)dev->iobase;
+
+ readb(iob);
+ readb(iob + 1);
+ readb(iob);
+ readb(iob + 1);
+ readb(iob);
+
+ REG_WRITE(regno, &priv->regs->pptr);
+ return REG_READ(&priv->regs->pdata);
+}
+#endif
+
+static u16 get_reg(struct eth_device *dev, int regno)
+{
+ struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
+ REG_WRITE(regno, &priv->regs->pptr);
+ return REG_READ(&priv->regs->pdata);
+}
+
+
+static void put_reg(struct eth_device *dev, int regno, u16 val)
+{
+ struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
+ REG_WRITE(regno, &priv->regs->pptr);
+ REG_WRITE(val, &priv->regs->pdata);
+}
+
+static void cs8900_reset(struct eth_device *dev)
+{
+ int tmo;
+ u16 us;
+
+ /* reset NIC */
+ put_reg(dev, PP_SelfCTL, get_reg(dev, PP_SelfCTL) | PP_SelfCTL_Reset);
+
+ /* wait for 200ms */
+ udelay(200000);
+ /* Wait until the chip is reset */
+
+ tmo = get_timer(0) + 1 * CONFIG_SYS_HZ;
+ while ((((us = get_reg_init_bus(dev, PP_SelfSTAT)) &
+ PP_SelfSTAT_InitD) == 0) && tmo < get_timer(0))
+ /*NOP*/;
+}
+
+static void cs8900_reginit(struct eth_device *dev)
+{
+ /* receive only error free packets addressed to this card */
+ put_reg(dev, PP_RxCTL,
+ PP_RxCTL_IA | PP_RxCTL_Broadcast | PP_RxCTL_RxOK);
+ /* do not generate any interrupts on receive operations */
+ put_reg(dev, PP_RxCFG, 0);
+ /* do not generate any interrupts on transmit operations */
+ put_reg(dev, PP_TxCFG, 0);
+ /* do not generate any interrupts on buffer operations */
+ put_reg(dev, PP_BufCFG, 0);
+ /* enable transmitter/receiver mode */
+ put_reg(dev, PP_LineCTL, PP_LineCTL_Rx | PP_LineCTL_Tx);
+}
+
+void cs8900_get_enetaddr(struct eth_device *dev)
+{
+ int i;
+
+ /* verify chip id */
+ if (get_reg_init_bus(dev, PP_ChipID) != 0x630e)
+ return;
+ cs8900_reset(dev);
+ if ((get_reg(dev, PP_SelfSTAT) &
+ (PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) ==
+ (PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) {
+
+ /* Load the MAC from EEPROM */
+ for (i = 0; i < 3; i++) {
+ u32 Addr;
+
+ Addr = get_reg(dev, PP_IA + i * 2);
+ dev->enetaddr[i * 2] = Addr & 0xFF;
+ dev->enetaddr[i * 2 + 1] = Addr >> 8;
+ }
+ }
+}
+
+void cs8900_halt(struct eth_device *dev)
+{
+ /* disable transmitter/receiver mode */
+ put_reg(dev, PP_LineCTL, 0);
+
+ /* "shutdown" to show ChipID or kernel wouldn't find he cs8900 ... */
+ get_reg_init_bus(dev, PP_ChipID);
+}
+
+static int cs8900_init(struct eth_device *dev, bd_t * bd)
+{
+ uchar *enetaddr = dev->enetaddr;
+ u16 id;
+
+ /* verify chip id */
+ id = get_reg_init_bus(dev, PP_ChipID);
+ if (id != 0x630e) {
+ printf ("CS8900 Ethernet chip not found: "
+ "ID=0x%04x instead 0x%04x\n", id, 0x630e);
+ return 1;
+ }
+
+ cs8900_reset (dev);
+ /* set the ethernet address */
+ put_reg(dev, PP_IA + 0, enetaddr[0] | (enetaddr[1] << 8));
+ put_reg(dev, PP_IA + 2, enetaddr[2] | (enetaddr[3] << 8));
+ put_reg(dev, PP_IA + 4, enetaddr[4] | (enetaddr[5] << 8));
+
+ cs8900_reginit(dev);
+ return 0;
+}
+
+/* Get a data block via Ethernet */
+static int cs8900_recv(struct eth_device *dev)
+{
+ int i;
+ u16 rxlen;
+ u16 *addr;
+ u16 status;
+
+ struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
+
+ status = get_reg(dev, PP_RER);
+
+ if ((status & PP_RER_RxOK) == 0)
+ return 0;
+
+ status = REG_READ(&priv->regs->rtdata);
+ rxlen = REG_READ(&priv->regs->rtdata);
+
+ if (rxlen > PKTSIZE_ALIGN + PKTALIGN)
+ debug("packet too big!\n");
+ for (addr = (u16 *) NetRxPackets[0], i = rxlen >> 1; i > 0;
+ i--)
+ *addr++ = REG_READ(&priv->regs->rtdata);
+ if (rxlen & 1)
+ *addr++ = REG_READ(&priv->regs->rtdata);
+
+ /* Pass the packet up to the protocol layers. */
+ NetReceive (NetRxPackets[0], rxlen);
+ return rxlen;
+}
+
+/* Send a data block via Ethernet. */
+static int cs8900_send(struct eth_device *dev, void *packet, int length)
+{
+ volatile u16 *addr;
+ int tmo;
+ u16 s;
+ struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
+
+retry:
+ /* initiate a transmit sequence */
+ REG_WRITE(PP_TxCmd_TxStart_Full, &priv->regs->txcmd);
+ REG_WRITE(length, &priv->regs->txlen);
+
+ /* Test to see if the chip has allocated memory for the packet */
+ if ((get_reg(dev, PP_BusSTAT) & PP_BusSTAT_TxRDY) == 0) {
+ /* Oops... this should not happen! */
+ debug("cs: unable to send packet; retrying...\n");
+ for (tmo = get_timer(0) + 5 * CONFIG_SYS_HZ;
+ get_timer(0) < tmo;)
+ /*NOP*/;
+ cs8900_reset(dev);
+ cs8900_reginit(dev);
+ goto retry;
+ }
+
+ /* Write the contents of the packet */
+ /* assume even number of bytes */
+ for (addr = packet; length > 0; length -= 2)
+ REG_WRITE(*addr++, &priv->regs->rtdata);
+
+ /* wait for transfer to succeed */
+ tmo = get_timer(0) + 5 * CONFIG_SYS_HZ;
+ while ((s = get_reg(dev, PP_TER) & ~0x1F) == 0) {
+ if (get_timer(0) >= tmo)
+ break;
+ }
+
+ /* nothing */ ;
+ if((s & (PP_TER_CRS | PP_TER_TxOK)) != PP_TER_TxOK) {
+ debug("\ntransmission error %#x\n", s);
+ }
+
+ return 0;
+}
+
+static void cs8900_e2prom_ready(struct eth_device *dev)
+{
+ while (get_reg(dev, PP_SelfSTAT) & SI_BUSY)
+ ;
+}
+
+/***********************************************************/
+/* read a 16-bit word out of the EEPROM */
+/***********************************************************/
+
+int cs8900_e2prom_read(struct eth_device *dev,
+ u8 addr, u16 *value)
+{
+ cs8900_e2prom_ready(dev);
+ put_reg(dev, PP_EECMD, EEPROM_READ_CMD | addr);
+ cs8900_e2prom_ready(dev);
+ *value = get_reg(dev, PP_EEData);
+
+ return 0;
+}
+
+
+/***********************************************************/
+/* write a 16-bit word into the EEPROM */
+/***********************************************************/
+
+int cs8900_e2prom_write(struct eth_device *dev, u8 addr, u16 value)
+{
+ cs8900_e2prom_ready(dev);
+ put_reg(dev, PP_EECMD, EEPROM_WRITE_EN);
+ cs8900_e2prom_ready(dev);
+ put_reg(dev, PP_EEData, value);
+ put_reg(dev, PP_EECMD, EEPROM_WRITE_CMD | addr);
+ cs8900_e2prom_ready(dev);
+ put_reg(dev, PP_EECMD, EEPROM_WRITE_DIS);
+ cs8900_e2prom_ready(dev);
+
+ return 0;
+}
+
+int cs8900_initialize(u8 dev_num, int base_addr)
+{
+ struct eth_device *dev;
+ struct cs8900_priv *priv;
+
+ dev = malloc(sizeof(*dev));
+ if (!dev) {
+ return 0;
+ }
+ memset(dev, 0, sizeof(*dev));
+
+ priv = malloc(sizeof(*priv));
+ if (!priv) {
+ free(dev);
+ return 0;
+ }
+ memset(priv, 0, sizeof(*priv));
+ priv->regs = (struct cs8900_regs *)base_addr;
+
+ dev->iobase = base_addr;
+ dev->priv = priv;
+ dev->init = cs8900_init;
+ dev->halt = cs8900_halt;
+ dev->send = cs8900_send;
+ dev->recv = cs8900_recv;
+
+ /* Load MAC address from EEPROM */
+ cs8900_get_enetaddr(dev);
+
+ sprintf(dev->name, "%s-%hu", CS8900_DRIVERNAME, dev_num);
+
+ eth_register(dev);
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff