--- /dev/null
+/* Only eth0 supported for now
+ *
+ * (C) Copyright 2003
+ * Thomas.Lange@corelatus.se
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <config.h>
+
+#if defined(CONFIG_SYS_DISCOVER_PHY)
+#error "PHY not supported yet"
+/* We just assume that we are running 100FD for now */
+/* We all use switches, right? ;-) */
+#endif
+
+/* I assume ethernet behaves like au1000 */
+
+#ifdef CONFIG_SOC_AU1000
+/* Base address differ between cpu:s */
+#define ETH0_BASE AU1000_ETH0_BASE
+#define MAC0_ENABLE AU1000_MAC0_ENABLE
+#else
+#ifdef CONFIG_SOC_AU1100
+#define ETH0_BASE AU1100_ETH0_BASE
+#define MAC0_ENABLE AU1100_MAC0_ENABLE
+#else
+#ifdef CONFIG_SOC_AU1500
+#define ETH0_BASE AU1500_ETH0_BASE
+#define MAC0_ENABLE AU1500_MAC0_ENABLE
+#else
+#ifdef CONFIG_SOC_AU1550
+#define ETH0_BASE AU1550_ETH0_BASE
+#define MAC0_ENABLE AU1550_MAC0_ENABLE
+#else
+#error "No valid cpu set"
+#endif
+#endif
+#endif
+#endif
+
+#include <common.h>
+#include <malloc.h>
+#include <net.h>
+#include <command.h>
+#include <asm/io.h>
+#include <asm/au1x00.h>
+
+#if defined(CONFIG_CMD_MII)
+#include <miiphy.h>
+#endif
+
+/* Ethernet Transmit and Receive Buffers */
+#define DBUF_LENGTH 1520
+#define PKT_MAXBUF_SIZE 1518
+
+static char txbuf[DBUF_LENGTH];
+
+static int next_tx;
+static int next_rx;
+
+/* 4 rx and 4 tx fifos */
+#define NO_OF_FIFOS 4
+
+typedef struct{
+ u32 status;
+ u32 addr;
+ u32 len; /* Only used for tx */
+ u32 not_used;
+} mac_fifo_t;
+
+mac_fifo_t mac_fifo[NO_OF_FIFOS];
+
+#define MAX_WAIT 1000
+
+#if defined(CONFIG_CMD_MII)
+int au1x00_miiphy_read(const char *devname, unsigned char addr,
+ unsigned char reg, unsigned short * value)
+{
+ volatile u32 *mii_control_reg = (volatile u32*)(ETH0_BASE+MAC_MII_CNTRL);
+ volatile u32 *mii_data_reg = (volatile u32*)(ETH0_BASE+MAC_MII_DATA);
+ u32 mii_control;
+ unsigned int timedout = 20;
+
+ while (*mii_control_reg & MAC_MII_BUSY) {
+ udelay(1000);
+ if (--timedout == 0) {
+ printf("au1x00_eth: miiphy_read busy timeout!!\n");
+ return -1;
+ }
+ }
+
+ mii_control = MAC_SET_MII_SELECT_REG(reg) |
+ MAC_SET_MII_SELECT_PHY(addr) | MAC_MII_READ;
+
+ *mii_control_reg = mii_control;
+
+ timedout = 20;
+ while (*mii_control_reg & MAC_MII_BUSY) {
+ udelay(1000);
+ if (--timedout == 0) {
+ printf("au1x00_eth: miiphy_read busy timeout!!\n");
+ return -1;
+ }
+ }
+ *value = *mii_data_reg;
+ return 0;
+}
+
+int au1x00_miiphy_write(const char *devname, unsigned char addr,
+ unsigned char reg, unsigned short value)
+{
+ volatile u32 *mii_control_reg = (volatile u32*)(ETH0_BASE+MAC_MII_CNTRL);
+ volatile u32 *mii_data_reg = (volatile u32*)(ETH0_BASE+MAC_MII_DATA);
+ u32 mii_control;
+ unsigned int timedout = 20;
+
+ while (*mii_control_reg & MAC_MII_BUSY) {
+ udelay(1000);
+ if (--timedout == 0) {
+ printf("au1x00_eth: miiphy_write busy timeout!!\n");
+ return -1;
+ }
+ }
+
+ mii_control = MAC_SET_MII_SELECT_REG(reg) |
+ MAC_SET_MII_SELECT_PHY(addr) | MAC_MII_WRITE;
+
+ *mii_data_reg = value;
+ *mii_control_reg = mii_control;
+ return 0;
+}
+#endif
+
+static int au1x00_send(struct eth_device *dev, void *packet, int length)
+{
+ volatile mac_fifo_t *fifo_tx =
+ (volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
+ int i;
+ int res;
+
+ /* tx fifo should always be idle */
+ fifo_tx[next_tx].len = length;
+ fifo_tx[next_tx].addr = (virt_to_phys(packet))|TX_DMA_ENABLE;
+ au_sync();
+
+ udelay(1);
+ i=0;
+ while(!(fifo_tx[next_tx].addr&TX_T_DONE)){
+ if(i>MAX_WAIT){
+ printf("TX timeout\n");
+ break;
+ }
+ udelay(1);
+ i++;
+ }
+
+ /* Clear done bit */
+ fifo_tx[next_tx].addr = 0;
+ fifo_tx[next_tx].len = 0;
+ au_sync();
+
+ res = fifo_tx[next_tx].status;
+
+ next_tx++;
+ if(next_tx>=NO_OF_FIFOS){
+ next_tx=0;
+ }
+ return(res);
+}
+
+static int au1x00_recv(struct eth_device* dev){
+ volatile mac_fifo_t *fifo_rx =
+ (volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
+
+ int length;
+ u32 status;
+
+ for(;;){
+ if(!(fifo_rx[next_rx].addr&RX_T_DONE)){
+ /* Nothing has been received */
+ return(-1);
+ }
+
+ status = fifo_rx[next_rx].status;
+
+ length = status&0x3FFF;
+
+ if(status&RX_ERROR){
+ printf("Rx error 0x%x\n", status);
+ }
+ else{
+ /* Pass the packet up to the protocol layers. */
+ NetReceive(NetRxPackets[next_rx], length - 4);
+ }
+
+ fifo_rx[next_rx].addr = (virt_to_phys(NetRxPackets[next_rx]))|RX_DMA_ENABLE;
+
+ next_rx++;
+ if(next_rx>=NO_OF_FIFOS){
+ next_rx=0;
+ }
+ } /* for */
+
+ return(0); /* Does anyone use this? */
+}
+
+static int au1x00_init(struct eth_device* dev, bd_t * bd){
+
+ volatile u32 *macen = (volatile u32*)MAC0_ENABLE;
+ volatile u32 *mac_ctrl = (volatile u32*)(ETH0_BASE+MAC_CONTROL);
+ volatile u32 *mac_addr_high = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_HIGH);
+ volatile u32 *mac_addr_low = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_LOW);
+ volatile u32 *mac_mcast_high = (volatile u32*)(ETH0_BASE+MAC_MCAST_HIGH);
+ volatile u32 *mac_mcast_low = (volatile u32*)(ETH0_BASE+MAC_MCAST_LOW);
+ volatile mac_fifo_t *fifo_tx =
+ (volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
+ volatile mac_fifo_t *fifo_rx =
+ (volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
+ int i;
+
+ next_tx = TX_GET_DMA_BUFFER(fifo_tx[0].addr);
+ next_rx = RX_GET_DMA_BUFFER(fifo_rx[0].addr);
+
+ /* We have to enable clocks before releasing reset */
+ *macen = MAC_EN_CLOCK_ENABLE;
+ udelay(10);
+
+ /* Enable MAC0 */
+ /* We have to release reset before accessing registers */
+ *macen = MAC_EN_CLOCK_ENABLE|MAC_EN_RESET0|
+ MAC_EN_RESET1|MAC_EN_RESET2;
+ udelay(10);
+
+ for(i=0;i<NO_OF_FIFOS;i++){
+ fifo_tx[i].len = 0;
+ fifo_tx[i].addr = virt_to_phys(&txbuf[0]);
+ fifo_rx[i].addr = (virt_to_phys(NetRxPackets[i]))|RX_DMA_ENABLE;
+ }
+
+ /* Put mac addr in little endian */
+#define ea eth_get_dev()->enetaddr
+ *mac_addr_high = (ea[5] << 8) | (ea[4] ) ;
+ *mac_addr_low = (ea[3] << 24) | (ea[2] << 16) |
+ (ea[1] << 8) | (ea[0] ) ;
+#undef ea
+ *mac_mcast_low = 0;
+ *mac_mcast_high = 0;
+
+ /* Make sure the MAC buffer is in the correct endian mode */
+#ifdef __LITTLE_ENDIAN
+ *mac_ctrl = MAC_FULL_DUPLEX;
+ udelay(1);
+ *mac_ctrl = MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE;
+#else
+ *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX;
+ udelay(1);
+ *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE;
+#endif
+
+ return(1);
+}
+
+static void au1x00_halt(struct eth_device* dev){
+ volatile u32 *macen = (volatile u32*)MAC0_ENABLE;
+
+ /* Put MAC0 in reset */
+ *macen = 0;
+}
+
+int au1x00_enet_initialize(bd_t *bis){
+ struct eth_device* dev;
+
+ if ((dev = (struct eth_device*)malloc(sizeof *dev)) == NULL) {
+ puts ("malloc failed\n");
+ return -1;
+ }
+
+ memset(dev, 0, sizeof *dev);
+
+ sprintf(dev->name, "Au1X00 ethernet");
+ dev->iobase = 0;
+ dev->priv = 0;
+ dev->init = au1x00_init;
+ dev->halt = au1x00_halt;
+ dev->send = au1x00_send;
+ dev->recv = au1x00_recv;
+
+ eth_register(dev);
+
+#if defined(CONFIG_CMD_MII)
+ miiphy_register(dev->name,
+ au1x00_miiphy_read, au1x00_miiphy_write);
+#endif
+
+ return 1;
+}
Code Review / kvmfornfv.git / blobdiff