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u-boot/drivers/net/at91_emac.c
Joe Hershberger 1fd92db83d net: cosmetic: Fix var naming net <-> eth drivers 
Update the naming convention used in the network stack functions and
variables that Ethernet drivers use to interact with it.

This cleans up the temporary hacks that were added to this interface
along with the DM support.

This patch has a few remaining checkpatch.pl failures that would be out
of the scope of this patch to fix (drivers that are in gross violation
of checkpatch.pl).

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-04-18 11:11:33 -06:00

508 lines
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/*
* Copyright (C) 2009 BuS Elektronik GmbH & Co. KG
* Jens Scharsig (esw@bus-elektronik.de)
*
* (C) Copyright 2003
* Author : Hamid Ikdoumi (Atmel)
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <asm/arch/at91_emac.h>
#include <asm/arch/at91_pmc.h>
#include <asm/arch/at91_pio.h>
#include <net.h>
#include <netdev.h>
#include <malloc.h>
#include <miiphy.h>
#include <linux/mii.h>
#undef MII_DEBUG
#undef ET_DEBUG
#if (CONFIG_SYS_RX_ETH_BUFFER > 1024)
#error AT91 EMAC supports max 1024 RX buffers. \
Please decrease the CONFIG_SYS_RX_ETH_BUFFER value
#endif
#ifndef CONFIG_DRIVER_AT91EMAC_PHYADDR
#define CONFIG_DRIVER_AT91EMAC_PHYADDR 0
#endif
/* MDIO clock must not exceed 2.5 MHz, so enable MCK divider */
#if (AT91C_MASTER_CLOCK > 80000000)
#define HCLK_DIV AT91_EMAC_CFG_MCLK_64
#elif (AT91C_MASTER_CLOCK > 40000000)
#define HCLK_DIV AT91_EMAC_CFG_MCLK_32
#elif (AT91C_MASTER_CLOCK > 20000000)
#define HCLK_DIV AT91_EMAC_CFG_MCLK_16
#else
#define HCLK_DIV AT91_EMAC_CFG_MCLK_8
#endif
#ifdef ET_DEBUG
#define DEBUG_AT91EMAC 1
#else
#define DEBUG_AT91EMAC 0
#endif
#ifdef MII_DEBUG
#define DEBUG_AT91PHY 1
#else
#define DEBUG_AT91PHY 0
#endif
#ifndef CONFIG_DRIVER_AT91EMAC_QUIET
#define VERBOSEP 1
#else
#define VERBOSEP 0
#endif
#define RBF_ADDR 0xfffffffc
#define RBF_OWNER (1<<0)
#define RBF_WRAP (1<<1)
#define RBF_BROADCAST (1<<31)
#define RBF_MULTICAST (1<<30)
#define RBF_UNICAST (1<<29)
#define RBF_EXTERNAL (1<<28)
#define RBF_UNKNOWN (1<<27)
#define RBF_SIZE 0x07ff
#define RBF_LOCAL4 (1<<26)
#define RBF_LOCAL3 (1<<25)
#define RBF_LOCAL2 (1<<24)
#define RBF_LOCAL1 (1<<23)
#define RBF_FRAMEMAX CONFIG_SYS_RX_ETH_BUFFER
#define RBF_FRAMELEN 0x600
typedef struct {
unsigned long addr, size;
} rbf_t;
typedef struct {
rbf_t rbfdt[RBF_FRAMEMAX];
unsigned long rbindex;
} emac_device;
void at91emac_EnableMDIO(at91_emac_t *at91mac)
{
/* Mac CTRL reg set for MDIO enable */
writel(readl(&at91mac->ctl) | AT91_EMAC_CTL_MPE, &at91mac->ctl);
}
void at91emac_DisableMDIO(at91_emac_t *at91mac)
{
/* Mac CTRL reg set for MDIO disable */
writel(readl(&at91mac->ctl) & ~AT91_EMAC_CTL_MPE, &at91mac->ctl);
}
int at91emac_read(at91_emac_t *at91mac, unsigned char addr,
unsigned char reg, unsigned short *value)
{
unsigned long netstat;
at91emac_EnableMDIO(at91mac);
writel(AT91_EMAC_MAN_HIGH | AT91_EMAC_MAN_RW_R |
AT91_EMAC_MAN_REGA(reg) | AT91_EMAC_MAN_CODE_802_3 |
AT91_EMAC_MAN_PHYA(addr),
&at91mac->man);
do {
netstat = readl(&at91mac->sr);
debug_cond(DEBUG_AT91PHY, "poll SR %08lx\n", netstat);
} while (!(netstat & AT91_EMAC_SR_IDLE));
*value = readl(&at91mac->man) & AT91_EMAC_MAN_DATA_MASK;
at91emac_DisableMDIO(at91mac);
debug_cond(DEBUG_AT91PHY,
"AT91PHY read %p REG(%d)=%x\n", at91mac, reg, *value);
return 0;
}
int at91emac_write(at91_emac_t *at91mac, unsigned char addr,
unsigned char reg, unsigned short value)
{
unsigned long netstat;
debug_cond(DEBUG_AT91PHY,
"AT91PHY write %p REG(%d)=%p\n", at91mac, reg, &value);
at91emac_EnableMDIO(at91mac);
writel(AT91_EMAC_MAN_HIGH | AT91_EMAC_MAN_RW_W |
AT91_EMAC_MAN_REGA(reg) | AT91_EMAC_MAN_CODE_802_3 |
AT91_EMAC_MAN_PHYA(addr) | (value & AT91_EMAC_MAN_DATA_MASK),
&at91mac->man);
do {
netstat = readl(&at91mac->sr);
debug_cond(DEBUG_AT91PHY, "poll SR %08lx\n", netstat);
} while (!(netstat & AT91_EMAC_SR_IDLE));
at91emac_DisableMDIO(at91mac);
return 0;
}
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
at91_emac_t *get_emacbase_by_name(const char *devname)
{
struct eth_device *netdev;
netdev = eth_get_dev_by_name(devname);
return (at91_emac_t *) netdev->iobase;
}
int at91emac_mii_read(const char *devname, unsigned char addr,
unsigned char reg, unsigned short *value)
{
at91_emac_t *emac;
emac = get_emacbase_by_name(devname);
at91emac_read(emac , addr, reg, value);
return 0;
}
int at91emac_mii_write(const char *devname, unsigned char addr,
unsigned char reg, unsigned short value)
{
at91_emac_t *emac;
emac = get_emacbase_by_name(devname);
at91emac_write(emac, addr, reg, value);
return 0;
}
#endif
static int at91emac_phy_reset(struct eth_device *netdev)
{
int i;
u16 status, adv;
at91_emac_t *emac;
emac = (at91_emac_t *) netdev->iobase;
adv = ADVERTISE_CSMA | ADVERTISE_ALL;
at91emac_write(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
MII_ADVERTISE, adv);
debug_cond(VERBOSEP, "%s: Starting autonegotiation...\n", netdev->name);
at91emac_write(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR, MII_BMCR,
(BMCR_ANENABLE | BMCR_ANRESTART));
for (i = 0; i < 30000; i++) {
at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
MII_BMSR, &status);
if (status & BMSR_ANEGCOMPLETE)
break;
udelay(100);
}
if (status & BMSR_ANEGCOMPLETE) {
debug_cond(VERBOSEP,
"%s: Autonegotiation complete\n", netdev->name);
} else {
printf("%s: Autonegotiation timed out (status=0x%04x)\n",
netdev->name, status);
return -1;
}
return 0;
}
static int at91emac_phy_init(struct eth_device *netdev)
{
u16 phy_id, status, adv, lpa;
int media, speed, duplex;
int i;
at91_emac_t *emac;
emac = (at91_emac_t *) netdev->iobase;
/* Check if the PHY is up to snuff... */
at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
MII_PHYSID1, &phy_id);
if (phy_id == 0xffff) {
printf("%s: No PHY present\n", netdev->name);
return -1;
}
at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
MII_BMSR, &status);
if (!(status & BMSR_LSTATUS)) {
/* Try to re-negotiate if we don't have link already. */
if (at91emac_phy_reset(netdev))
return -2;
for (i = 0; i < 100000 / 100; i++) {
at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
MII_BMSR, &status);
if (status & BMSR_LSTATUS)
break;
udelay(100);
}
}
if (!(status & BMSR_LSTATUS)) {
debug_cond(VERBOSEP, "%s: link down\n", netdev->name);
return -3;
} else {
at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
MII_ADVERTISE, &adv);
at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
MII_LPA, &lpa);
media = mii_nway_result(lpa & adv);
speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)
? 1 : 0);
duplex = (media & ADVERTISE_FULL) ? 1 : 0;
debug_cond(VERBOSEP, "%s: link up, %sMbps %s-duplex\n",
netdev->name,
speed ? "100" : "10",
duplex ? "full" : "half");
}
return 0;
}
int at91emac_UpdateLinkSpeed(at91_emac_t *emac)
{
unsigned short stat1;
at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR, MII_BMSR, &stat1);
if (!(stat1 & BMSR_LSTATUS)) /* link status up? */
return -1;
if (stat1 & BMSR_100FULL) {
/*set Emac for 100BaseTX and Full Duplex */
writel(readl(&emac->cfg) |
AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD,
&emac->cfg);
return 0;
}
if (stat1 & BMSR_10FULL) {
/*set MII for 10BaseT and Full Duplex */
writel((readl(&emac->cfg) &
~(AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD)
) | AT91_EMAC_CFG_FD,
&emac->cfg);
return 0;
}
if (stat1 & BMSR_100HALF) {
/*set MII for 100BaseTX and Half Duplex */
writel((readl(&emac->cfg) &
~(AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD)
) | AT91_EMAC_CFG_SPD,
&emac->cfg);
return 0;
}
if (stat1 & BMSR_10HALF) {
/*set MII for 10BaseT and Half Duplex */
writel((readl(&emac->cfg) &
~(AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD)),
&emac->cfg);
return 0;
}
return 0;
}
static int at91emac_init(struct eth_device *netdev, bd_t *bd)
{
int i;
u32 value;
emac_device *dev;
at91_emac_t *emac;
at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIO;
at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
emac = (at91_emac_t *) netdev->iobase;
dev = (emac_device *) netdev->priv;
/* PIO Disable Register */
value = ATMEL_PMX_AA_EMDIO | ATMEL_PMX_AA_EMDC |
ATMEL_PMX_AA_ERXER | ATMEL_PMX_AA_ERX1 |
ATMEL_PMX_AA_ERX0 | ATMEL_PMX_AA_ECRS |
ATMEL_PMX_AA_ETX1 | ATMEL_PMX_AA_ETX0 |
ATMEL_PMX_AA_ETXEN | ATMEL_PMX_AA_EREFCK;
writel(value, &pio->pioa.pdr);
writel(value, &pio->pioa.asr);
#ifdef CONFIG_RMII
value = ATMEL_PMX_BA_ERXCK;
#else
value = ATMEL_PMX_BA_ERXCK | ATMEL_PMX_BA_ECOL |
ATMEL_PMX_BA_ERXDV | ATMEL_PMX_BA_ERX3 |
ATMEL_PMX_BA_ERX2 | ATMEL_PMX_BA_ETXER |
ATMEL_PMX_BA_ETX3 | ATMEL_PMX_BA_ETX2;
#endif
writel(value, &pio->piob.pdr);
writel(value, &pio->piob.bsr);
writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
writel(readl(&emac->ctl) | AT91_EMAC_CTL_CSR, &emac->ctl);
/* Init Ethernet buffers */
for (i = 0; i < RBF_FRAMEMAX; i++) {
dev->rbfdt[i].addr = (unsigned long) net_rx_packets[i];
dev->rbfdt[i].size = 0;
}
dev->rbfdt[RBF_FRAMEMAX - 1].addr |= RBF_WRAP;
dev->rbindex = 0;
writel((u32) &(dev->rbfdt[0]), &emac->rbqp);
writel(readl(&emac->rsr) &
~(AT91_EMAC_RSR_OVR | AT91_EMAC_RSR_REC | AT91_EMAC_RSR_BNA),
&emac->rsr);
value = AT91_EMAC_CFG_CAF | AT91_EMAC_CFG_NBC |
HCLK_DIV;
#ifdef CONFIG_RMII
value |= AT91_EMAC_CFG_RMII;
#endif
writel(value, &emac->cfg);
writel(readl(&emac->ctl) | AT91_EMAC_CTL_TE | AT91_EMAC_CTL_RE,
&emac->ctl);
if (!at91emac_phy_init(netdev)) {
at91emac_UpdateLinkSpeed(emac);
return 0;
}
return -1;
}
static void at91emac_halt(struct eth_device *netdev)
{
at91_emac_t *emac;
emac = (at91_emac_t *) netdev->iobase;
writel(readl(&emac->ctl) & ~(AT91_EMAC_CTL_TE | AT91_EMAC_CTL_RE),
&emac->ctl);
debug_cond(DEBUG_AT91EMAC, "halt MAC\n");
}
static int at91emac_send(struct eth_device *netdev, void *packet, int length)
{
at91_emac_t *emac;
emac = (at91_emac_t *) netdev->iobase;
while (!(readl(&emac->tsr) & AT91_EMAC_TSR_BNQ))
;
writel((u32) packet, &emac->tar);
writel(AT91_EMAC_TCR_LEN(length), &emac->tcr);
while (AT91_EMAC_TCR_LEN(readl(&emac->tcr)))
;
debug_cond(DEBUG_AT91EMAC, "Send %d\n", length);
writel(readl(&emac->tsr) | AT91_EMAC_TSR_COMP, &emac->tsr);
return 0;
}
static int at91emac_recv(struct eth_device *netdev)
{
emac_device *dev;
at91_emac_t *emac;
rbf_t *rbfp;
int size;
emac = (at91_emac_t *) netdev->iobase;
dev = (emac_device *) netdev->priv;
rbfp = &dev->rbfdt[dev->rbindex];
while (rbfp->addr & RBF_OWNER) {
size = rbfp->size & RBF_SIZE;
net_process_received_packet(net_rx_packets[dev->rbindex], size);
debug_cond(DEBUG_AT91EMAC, "Recv[%ld]: %d bytes @ %lx\n",
dev->rbindex, size, rbfp->addr);
rbfp->addr &= ~RBF_OWNER;
rbfp->size = 0;
if (dev->rbindex < (RBF_FRAMEMAX-1))
dev->rbindex++;
else
dev->rbindex = 0;
rbfp = &(dev->rbfdt[dev->rbindex]);
if (!(rbfp->addr & RBF_OWNER))
writel(readl(&emac->rsr) | AT91_EMAC_RSR_REC,
&emac->rsr);
}
if (readl(&emac->isr) & AT91_EMAC_IxR_RBNA) {
/* EMAC silicon bug 41.3.1 workaround 1 */
writel(readl(&emac->ctl) & ~AT91_EMAC_CTL_RE, &emac->ctl);
writel(readl(&emac->ctl) | AT91_EMAC_CTL_RE, &emac->ctl);
dev->rbindex = 0;
printf("%s: reset receiver (EMAC dead lock bug)\n",
netdev->name);
}
return 0;
}
static int at91emac_write_hwaddr(struct eth_device *netdev)
{
at91_emac_t *emac;
at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
emac = (at91_emac_t *) netdev->iobase;
writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
debug_cond(DEBUG_AT91EMAC,
"init MAC-ADDR %02x:%02x:%02x:%02x:%02x:%02x\n",
netdev->enetaddr[5], netdev->enetaddr[4], netdev->enetaddr[3],
netdev->enetaddr[2], netdev->enetaddr[1], netdev->enetaddr[0]);
writel( (netdev->enetaddr[0] | netdev->enetaddr[1] << 8 |
netdev->enetaddr[2] << 16 | netdev->enetaddr[3] << 24),
&emac->sa2l);
writel((netdev->enetaddr[4] | netdev->enetaddr[5] << 8), &emac->sa2h);
debug_cond(DEBUG_AT91EMAC, "init MAC-ADDR %x%x\n",
readl(&emac->sa2h), readl(&emac->sa2l));
return 0;
}
int at91emac_register(bd_t *bis, unsigned long iobase)
{
emac_device *emac;
emac_device *emacfix;
struct eth_device *dev;
if (iobase == 0)
iobase = ATMEL_BASE_EMAC;
emac = malloc(sizeof(*emac)+512);
if (emac == NULL)
return -1;
dev = malloc(sizeof(*dev));
if (dev == NULL) {
free(emac);
return -1;
}
/* alignment as per Errata (64 bytes) is insufficient! */
emacfix = (emac_device *) (((unsigned long) emac + 0x1ff) & 0xFFFFFE00);
memset(emacfix, 0, sizeof(emac_device));
memset(dev, 0, sizeof(*dev));
sprintf(dev->name, "emac");
dev->iobase = iobase;
dev->priv = emacfix;
dev->init = at91emac_init;
dev->halt = at91emac_halt;
dev->send = at91emac_send;
dev->recv = at91emac_recv;
dev->write_hwaddr = at91emac_write_hwaddr;
eth_register(dev);
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
miiphy_register(dev->name, at91emac_mii_read, at91emac_mii_write);
#endif
return 1;
}
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