u-boot/drivers/net/sh_eth.c
Mike Frysinger c527ce9251 sh_eth: get mac address from environment
The environment is the canonical storage location of the mac address, so
we're killing off the global data location and moving everything to
querying the env directly.

The sh_eth driver can also be simplified a bit by using enetaddr member of
the eth_device structure.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
CC: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
CC: Carlos Munoz <carlos@kenati.com>
CC: Ben Warren <biggerbadderben@gmail.com>
2009-03-20 22:39:11 +01:00

681 lines
16 KiB
C

/*
* sh_eth.c - Driver for Renesas SH7763's ethernet controler.
*
* Copyright (C) 2008 Renesas Solutions Corp.
* Copyright (c) 2008 Nobuhiro Iwamatsu
* Copyright (c) 2007 Carlos Munoz <carlos@kenati.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <common.h>
#include <malloc.h>
#include <net.h>
#include <netdev.h>
#include <asm/errno.h>
#include <asm/io.h>
#include "sh_eth.h"
#ifndef CONFIG_SH_ETHER_USE_PORT
# error "Please define CONFIG_SH_ETHER_USE_PORT"
#endif
#ifndef CONFIG_SH_ETHER_PHY_ADDR
# error "Please define CONFIG_SH_ETHER_PHY_ADDR"
#endif
#define SH_ETH_PHY_DELAY 50000
/*
* Bits are written to the PHY serially using the
* PIR register, just like a bit banger.
*/
static void sh_eth_mii_write_phy_bits(int port, u32 val, int len)
{
int i;
u32 pir;
/* Bit positions is 1 less than the number of bits */
for (i = len - 1; i >= 0; i--) {
/* Write direction, bit to write, clock is low */
pir = 2 | ((val & 1 << i) ? 1 << 2 : 0);
outl(pir, PIR(port));
udelay(1);
/* Write direction, bit to write, clock is high */
pir = 3 | ((val & 1 << i) ? 1 << 2 : 0);
outl(pir, PIR(port));
udelay(1);
/* Write direction, bit to write, clock is low */
pir = 2 | ((val & 1 << i) ? 1 << 2 : 0);
outl(pir, PIR(port));
udelay(1);
}
}
static void sh_eth_mii_bus_release(int port)
{
/* Read direction, clock is low */
outl(0, PIR(port));
udelay(1);
/* Read direction, clock is high */
outl(1, PIR(port));
udelay(1);
/* Read direction, clock is low */
outl(0, PIR(port));
udelay(1);
}
static void sh_eth_mii_ind_bus_release(int port)
{
/* Read direction, clock is low */
outl(0, PIR(port));
udelay(1);
}
static void sh_eth_mii_read_phy_bits(int port, u32 *val, int len)
{
int i;
u32 pir;
*val = 0;
for (i = len - 1; i >= 0; i--) {
/* Read direction, clock is high */
outl(1, PIR(port));
udelay(1);
/* Read bit */
pir = inl(PIR(port));
*val |= (pir & 8) ? 1 << i : 0;
/* Read direction, clock is low */
outl(0, PIR(port));
udelay(1);
}
}
#define PHY_INIT 0xFFFFFFFF
#define PHY_READ 0x02
#define PHY_WRITE 0x01
/*
* To read a phy register, mii managements frames are sent to the phy.
* The frames look like this:
* pre (32 bits): 0xffff ffff
* st (2 bits): 01
* op (2bits): 10: read 01: write
* phyad (5 bits): xxxxx
* regad (5 bits): xxxxx
* ta (Bus release):
* data (16 bits): read data
*/
static u32 sh_eth_mii_read_phy_reg(int port, u8 phy_addr, int reg)
{
u32 val;
/* Sent mii management frame */
/* pre */
sh_eth_mii_write_phy_bits(port, PHY_INIT, 32);
/* st (start of frame) */
sh_eth_mii_write_phy_bits(port, 0x1, 2);
/* op (code) */
sh_eth_mii_write_phy_bits(port, PHY_READ, 2);
/* phy address */
sh_eth_mii_write_phy_bits(port, phy_addr, 5);
/* Register to read */
sh_eth_mii_write_phy_bits(port, reg, 5);
/* Bus release */
sh_eth_mii_bus_release(port);
/* Read register */
sh_eth_mii_read_phy_bits(port, &val, 16);
return val;
}
/*
* To write a phy register, mii managements frames are sent to the phy.
* The frames look like this:
* pre (32 bits): 0xffff ffff
* st (2 bits): 01
* op (2bits): 10: read 01: write
* phyad (5 bits): xxxxx
* regad (5 bits): xxxxx
* ta (2 bits): 10
* data (16 bits): write data
* idle (Independent bus release)
*/
static void sh_eth_mii_write_phy_reg(int port, u8 phy_addr, int reg, u16 val)
{
/* Sent mii management frame */
/* pre */
sh_eth_mii_write_phy_bits(port, PHY_INIT, 32);
/* st (start of frame) */
sh_eth_mii_write_phy_bits(port, 0x1, 2);
/* op (code) */
sh_eth_mii_write_phy_bits(port, PHY_WRITE, 2);
/* phy address */
sh_eth_mii_write_phy_bits(port, phy_addr, 5);
/* Register to read */
sh_eth_mii_write_phy_bits(port, reg, 5);
/* ta */
sh_eth_mii_write_phy_bits(port, PHY_READ, 2);
/* Write register data */
sh_eth_mii_write_phy_bits(port, val, 16);
/* Independent bus release */
sh_eth_mii_ind_bus_release(port);
}
int sh_eth_send(struct eth_device *dev, volatile void *packet, int len)
{
struct sh_eth_dev *eth = dev->priv;
int port = eth->port, ret = 0, timeout;
struct sh_eth_info *port_info = &eth->port_info[port];
if (!packet || len > 0xffff) {
printf(SHETHER_NAME ": %s: Invalid argument\n", __func__);
ret = -EINVAL;
goto err;
}
/* packet must be a 4 byte boundary */
if ((int)packet & (4 - 1)) {
printf(SHETHER_NAME ": %s: packet not 4 byte alligned\n", __func__);
ret = -EFAULT;
goto err;
}
/* Update tx descriptor */
port_info->tx_desc_cur->td2 = ADDR_TO_PHY(packet);
port_info->tx_desc_cur->td1 = len << 16;
/* Must preserve the end of descriptor list indication */
if (port_info->tx_desc_cur->td0 & TD_TDLE)
port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP | TD_TDLE;
else
port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP;
/* Restart the transmitter if disabled */
if (!(inl(EDTRR(port)) & EDTRR_TRNS))
outl(EDTRR_TRNS, EDTRR(port));
/* Wait until packet is transmitted */
timeout = 1000;
while (port_info->tx_desc_cur->td0 & TD_TACT && timeout--)
udelay(100);
if (timeout < 0) {
printf(SHETHER_NAME ": transmit timeout\n");
ret = -ETIMEDOUT;
goto err;
}
port_info->tx_desc_cur++;
if (port_info->tx_desc_cur >= port_info->tx_desc_base + NUM_TX_DESC)
port_info->tx_desc_cur = port_info->tx_desc_base;
return ret;
err:
return ret;
}
int sh_eth_recv(struct eth_device *dev)
{
struct sh_eth_dev *eth = dev->priv;
int port = eth->port, len = 0;
struct sh_eth_info *port_info = &eth->port_info[port];
volatile u8 *packet;
/* Check if the rx descriptor is ready */
if (!(port_info->rx_desc_cur->rd0 & RD_RACT)) {
/* Check for errors */
if (!(port_info->rx_desc_cur->rd0 & RD_RFE)) {
len = port_info->rx_desc_cur->rd1 & 0xffff;
packet = (volatile u8 *)
ADDR_TO_P2(port_info->rx_desc_cur->rd2);
NetReceive(packet, len);
}
/* Make current descriptor available again */
if (port_info->rx_desc_cur->rd0 & RD_RDLE)
port_info->rx_desc_cur->rd0 = RD_RACT | RD_RDLE;
else
port_info->rx_desc_cur->rd0 = RD_RACT;
/* Point to the next descriptor */
port_info->rx_desc_cur++;
if (port_info->rx_desc_cur >=
port_info->rx_desc_base + NUM_RX_DESC)
port_info->rx_desc_cur = port_info->rx_desc_base;
}
/* Restart the receiver if disabled */
if (!(inl(EDRRR(port)) & EDRRR_R))
outl(EDRRR_R, EDRRR(port));
return len;
}
#define EDMR_INIT_CNT 1000
static int sh_eth_reset(struct sh_eth_dev *eth)
{
int port = eth->port;
int ret = 0, i;
/* Start e-dmac transmitter and receiver */
outl(EDSR_ENALL, EDSR(port));
/* Perform a software reset and wait for it to complete */
outl(EDMR_SRST, EDMR(port));
for (i = 0; i < EDMR_INIT_CNT; i++) {
if (!(inl(EDMR(port)) & EDMR_SRST))
break;
udelay(1000);
}
if (i == EDMR_INIT_CNT) {
printf(SHETHER_NAME ": Software reset timeout\n");
ret = -EIO;
}
return ret;
}
static int sh_eth_tx_desc_init(struct sh_eth_dev *eth)
{
int port = eth->port, i, ret = 0;
u32 tmp_addr;
struct sh_eth_info *port_info = &eth->port_info[port];
struct tx_desc_s *cur_tx_desc;
/*
* Allocate tx descriptors. They must be TX_DESC_SIZE bytes aligned
*/
port_info->tx_desc_malloc = malloc(NUM_TX_DESC *
sizeof(struct tx_desc_s) +
TX_DESC_SIZE - 1);
if (!port_info->tx_desc_malloc) {
printf(SHETHER_NAME ": malloc failed\n");
ret = -ENOMEM;
goto err;
}
tmp_addr = (u32) (((int)port_info->tx_desc_malloc + TX_DESC_SIZE - 1) &
~(TX_DESC_SIZE - 1));
/* Make sure we use a P2 address (non-cacheable) */
port_info->tx_desc_base = (struct tx_desc_s *)ADDR_TO_P2(tmp_addr);
port_info->tx_desc_cur = port_info->tx_desc_base;
/* Initialize all descriptors */
for (cur_tx_desc = port_info->tx_desc_base, i = 0; i < NUM_TX_DESC;
cur_tx_desc++, i++) {
cur_tx_desc->td0 = 0x00;
cur_tx_desc->td1 = 0x00;
cur_tx_desc->td2 = 0x00;
}
/* Mark the end of the descriptors */
cur_tx_desc--;
cur_tx_desc->td0 |= TD_TDLE;
/* Point the controller to the tx descriptor list. Must use physical
addresses */
outl(ADDR_TO_PHY(port_info->tx_desc_base), TDLAR(port));
outl(ADDR_TO_PHY(port_info->tx_desc_base), TDFAR(port));
outl(ADDR_TO_PHY(cur_tx_desc), TDFXR(port));
outl(0x01, TDFFR(port));/* Last discriptor bit */
err:
return ret;
}
static int sh_eth_rx_desc_init(struct sh_eth_dev *eth)
{
int port = eth->port, i , ret = 0;
struct sh_eth_info *port_info = &eth->port_info[port];
struct rx_desc_s *cur_rx_desc;
u32 tmp_addr;
u8 *rx_buf;
/*
* Allocate rx descriptors. They must be RX_DESC_SIZE bytes aligned
*/
port_info->rx_desc_malloc = malloc(NUM_RX_DESC *
sizeof(struct rx_desc_s) +
RX_DESC_SIZE - 1);
if (!port_info->rx_desc_malloc) {
printf(SHETHER_NAME ": malloc failed\n");
ret = -ENOMEM;
goto err;
}
tmp_addr = (u32) (((int)port_info->rx_desc_malloc + RX_DESC_SIZE - 1) &
~(RX_DESC_SIZE - 1));
/* Make sure we use a P2 address (non-cacheable) */
port_info->rx_desc_base = (struct rx_desc_s *)ADDR_TO_P2(tmp_addr);
port_info->rx_desc_cur = port_info->rx_desc_base;
/*
* Allocate rx data buffers. They must be 32 bytes aligned and in
* P2 area
*/
port_info->rx_buf_malloc = malloc(NUM_RX_DESC * MAX_BUF_SIZE + 31);
if (!port_info->rx_buf_malloc) {
printf(SHETHER_NAME ": malloc failed\n");
ret = -ENOMEM;
goto err_buf_malloc;
}
tmp_addr = (u32)(((int)port_info->rx_buf_malloc + (32 - 1)) &
~(32 - 1));
port_info->rx_buf_base = (u8 *)ADDR_TO_P2(tmp_addr);
/* Initialize all descriptors */
for (cur_rx_desc = port_info->rx_desc_base,
rx_buf = port_info->rx_buf_base, i = 0;
i < NUM_RX_DESC; cur_rx_desc++, rx_buf += MAX_BUF_SIZE, i++) {
cur_rx_desc->rd0 = RD_RACT;
cur_rx_desc->rd1 = MAX_BUF_SIZE << 16;
cur_rx_desc->rd2 = (u32) ADDR_TO_PHY(rx_buf);
}
/* Mark the end of the descriptors */
cur_rx_desc--;
cur_rx_desc->rd0 |= RD_RDLE;
/* Point the controller to the rx descriptor list */
outl(ADDR_TO_PHY(port_info->rx_desc_base), RDLAR(port));
outl(ADDR_TO_PHY(port_info->rx_desc_base), RDFAR(port));
outl(ADDR_TO_PHY(cur_rx_desc), RDFXR(port));
outl(RDFFR_RDLF, RDFFR(port));
return ret;
err_buf_malloc:
free(port_info->rx_desc_malloc);
port_info->rx_desc_malloc = NULL;
err:
return ret;
}
static void sh_eth_tx_desc_free(struct sh_eth_dev *eth)
{
int port = eth->port;
struct sh_eth_info *port_info = &eth->port_info[port];
if (port_info->tx_desc_malloc) {
free(port_info->tx_desc_malloc);
port_info->tx_desc_malloc = NULL;
}
}
static void sh_eth_rx_desc_free(struct sh_eth_dev *eth)
{
int port = eth->port;
struct sh_eth_info *port_info = &eth->port_info[port];
if (port_info->rx_desc_malloc) {
free(port_info->rx_desc_malloc);
port_info->rx_desc_malloc = NULL;
}
if (port_info->rx_buf_malloc) {
free(port_info->rx_buf_malloc);
port_info->rx_buf_malloc = NULL;
}
}
static int sh_eth_desc_init(struct sh_eth_dev *eth)
{
int ret = 0;
ret = sh_eth_tx_desc_init(eth);
if (ret)
goto err_tx_init;
ret = sh_eth_rx_desc_init(eth);
if (ret)
goto err_rx_init;
return ret;
err_rx_init:
sh_eth_tx_desc_free(eth);
err_tx_init:
return ret;
}
static int sh_eth_phy_config(struct sh_eth_dev *eth)
{
int port = eth->port, timeout, ret = 0;
struct sh_eth_info *port_info = &eth->port_info[port];
u32 val;
/* Reset phy */
sh_eth_mii_write_phy_reg
(port, port_info->phy_addr, PHY_CTRL, PHY_C_RESET);
timeout = 10;
while (timeout--) {
val = sh_eth_mii_read_phy_reg(port,
port_info->phy_addr, PHY_CTRL);
if (!(val & PHY_C_RESET))
break;
udelay(SH_ETH_PHY_DELAY);
}
if (timeout < 0) {
printf(SHETHER_NAME ": phy reset timeout\n");
ret = -EIO;
goto err_tout;
}
/* Advertise 100/10 baseT full/half duplex */
sh_eth_mii_write_phy_reg(port, port_info->phy_addr, PHY_ANA,
(PHY_A_FDX|PHY_A_HDX|PHY_A_10FDX|PHY_A_10HDX|PHY_A_EXT));
/* Autonegotiation, normal operation, full duplex, enable tx */
sh_eth_mii_write_phy_reg(port, port_info->phy_addr, PHY_CTRL,
(PHY_C_ANEGEN|PHY_C_RANEG));
/* Wait for autonegotiation to complete */
timeout = 100;
while (timeout--) {
val = sh_eth_mii_read_phy_reg(port, port_info->phy_addr, 1);
if (val & PHY_S_ANEGC)
break;
udelay(SH_ETH_PHY_DELAY);
}
if (timeout < 0) {
printf(SHETHER_NAME ": phy auto-negotiation failed\n");
ret = -ETIMEDOUT;
goto err_tout;
}
return ret;
err_tout:
return ret;
}
static int sh_eth_config(struct sh_eth_dev *eth, bd_t *bd)
{
int port = eth->port, ret = 0;
u32 val, phy_status;
struct sh_eth_info *port_info = &eth->port_info[port];
struct eth_device *dev = port_info->dev;
/* Configure e-dmac registers */
outl((inl(EDMR(port)) & ~EMDR_DESC_R) | EDMR_EL, EDMR(port));
outl(0, EESIPR(port));
outl(0, TRSCER(port));
outl(0, TFTR(port));
outl((FIFO_SIZE_T | FIFO_SIZE_R), FDR(port));
outl(RMCR_RST, RMCR(port));
outl(0, RPADIR(port));
outl((FIFO_F_D_RFF | FIFO_F_D_RFD), FCFTR(port));
/* Configure e-mac registers */
outl(0, ECSIPR(port));
/* Set Mac address */
val = dev->enetaddr[0] << 24 | dev->enetaddr[1] << 16 |
dev->enetaddr[2] << 8 | dev->enetaddr[3];
outl(val, MAHR(port));
val = dev->enetaddr[4] << 8 | dev->enetaddr[5];
outl(val, MALR(port));
outl(RFLR_RFL_MIN, RFLR(port));
outl(0, PIPR(port));
outl(APR_AP, APR(port));
outl(MPR_MP, MPR(port));
outl(TPAUSER_TPAUSE, TPAUSER(port));
/* Configure phy */
ret = sh_eth_phy_config(eth);
if (ret) {
printf(SHETHER_NAME ":i phy config timeout\n");
goto err_phy_cfg;
}
/* Read phy status to finish configuring the e-mac */
phy_status = sh_eth_mii_read_phy_reg(port, port_info->phy_addr, 1);
/* Set the transfer speed */
if (phy_status & (PHY_S_100X_F|PHY_S_100X_H)) {
printf(SHETHER_NAME ": 100Base/");
outl(GECMR_100B, GECMR(port));
} else {
printf(SHETHER_NAME ": 10Base/");
outl(GECMR_10B, GECMR(port));
}
/* Check if full duplex mode is supported by the phy */
if (phy_status & (PHY_S_100X_F|PHY_S_10T_F)) {
printf("Full\n");
outl((ECMR_CHG_DM|ECMR_RE|ECMR_TE|ECMR_DM), ECMR(port));
} else {
printf("Half\n");
outl((ECMR_CHG_DM|ECMR_RE|ECMR_TE), ECMR(port));
}
return ret;
err_phy_cfg:
return ret;
}
static void sh_eth_start(struct sh_eth_dev *eth)
{
/*
* Enable the e-dmac receiver only. The transmitter will be enabled when
* we have something to transmit
*/
outl(EDRRR_R, EDRRR(eth->port));
}
static void sh_eth_stop(struct sh_eth_dev *eth)
{
outl(~EDRRR_R, EDRRR(eth->port));
}
int sh_eth_init(struct eth_device *dev, bd_t *bd)
{
int ret = 0;
struct sh_eth_dev *eth = dev->priv;
ret = sh_eth_reset(eth);
if (ret)
goto err;
ret = sh_eth_desc_init(eth);
if (ret)
goto err;
ret = sh_eth_config(eth, bd);
if (ret)
goto err_config;
sh_eth_start(eth);
return ret;
err_config:
sh_eth_tx_desc_free(eth);
sh_eth_rx_desc_free(eth);
err:
return ret;
}
void sh_eth_halt(struct eth_device *dev)
{
struct sh_eth_dev *eth = dev->priv;
sh_eth_stop(eth);
}
int sh_eth_initialize(bd_t *bd)
{
int ret = 0;
struct sh_eth_dev *eth = NULL;
struct eth_device *dev = NULL;
eth = (struct sh_eth_dev *)malloc(sizeof(struct sh_eth_dev));
if (!eth) {
printf(SHETHER_NAME ": %s: malloc failed\n", __func__);
ret = -ENOMEM;
goto err;
}
dev = (struct eth_device *)malloc(sizeof(struct eth_device));
if (!dev) {
printf(SHETHER_NAME ": %s: malloc failed\n", __func__);
ret = -ENOMEM;
goto err;
}
memset(dev, 0, sizeof(struct eth_device));
memset(eth, 0, sizeof(struct sh_eth_dev));
eth->port = CONFIG_SH_ETHER_USE_PORT;
eth->port_info[eth->port].phy_addr = CONFIG_SH_ETHER_PHY_ADDR;
dev->priv = (void *)eth;
dev->iobase = 0;
dev->init = sh_eth_init;
dev->halt = sh_eth_halt;
dev->send = sh_eth_send;
dev->recv = sh_eth_recv;
eth->port_info[eth->port].dev = dev;
sprintf(dev->name, SHETHER_NAME);
/* Register Device to EtherNet subsystem */
eth_register(dev);
if (!eth_getenv_enetaddr("ethaddr", dev->enetaddr))
puts("Please set MAC address\n");
return ret;
err:
if (dev)
free(dev);
if (eth)
free(eth);
printf(SHETHER_NAME ": Failed\n");
return ret;
}