+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2009 BuS Elektronik GmbH & Co. KG
- * Jens Scharsig (esw@bus-elektronik.de)
- *
- * (C) Copyright 2003
- * Author : Hamid Ikdoumi (Atmel)
- */
-
-#include <common.h>
-#include <log.h>
-#include <asm/io.h>
-#include <asm/arch/hardware.h>
-#include <asm/arch/at91_emac.h>
-#include <asm/arch/clk.h>
-#include <asm/arch/at91_pio.h>
-#include <net.h>
-#include <netdev.h>
-#include <malloc.h>
-#include <miiphy.h>
-#include <linux/delay.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(struct mii_dev *bus, int addr, int devad, int reg)
-{
- unsigned short value = 0;
- at91_emac_t *emac;
-
- emac = get_emacbase_by_name(bus->name);
- at91emac_read(emac , addr, reg, &value);
- return value;
-}
-
-
-int at91emac_mii_write(struct mii_dev *bus, int addr, int devad, int reg,
- u16 value)
-{
- at91_emac_t *emac;
-
- emac = get_emacbase_by_name(bus->name);
- 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, struct bd_info *bd)
-{
- int i;
- u32 value;
- emac_device *dev;
- at91_emac_t *emac;
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIO;
-
- 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.mux.pio2.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.mux.pio2.bsr);
-
- at91_periph_clk_enable(ATMEL_ID_EMAC);
-
- 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;
- emac = (at91_emac_t *) netdev->iobase;
-
- at91_periph_clk_enable(ATMEL_ID_EMAC);
-
- 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(struct bd_info *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));
- strcpy(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)
- int retval;
- struct mii_dev *mdiodev = mdio_alloc();
- if (!mdiodev)
- return -ENOMEM;
- strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
- mdiodev->read = at91emac_mii_read;
- mdiodev->write = at91emac_mii_write;
-
- retval = mdio_register(mdiodev);
- if (retval < 0)
- return retval;
-#endif
- return 1;
-}
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