2 * Copyright (C) 2009 BuS Elektronik GmbH & Co. KG
3 * Jens Scharsig (esw@bus-elektronik.de)
6 * Author : Hamid Ikdoumi (Atmel)
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #ifndef CONFIG_AT91_LEGACY
30 #include <asm/arch/hardware.h>
31 #include <asm/arch/at91_emac.h>
32 #include <asm/arch/at91_pmc.h>
33 #include <asm/arch/at91_pio.h>
35 /* remove next 5 lines, if all RM9200 boards convert to at91 arch */
36 #include <asm/arch-at91/at91rm9200.h>
37 #include <asm/arch-at91/hardware.h>
38 #include <asm/arch-at91/at91_emac.h>
39 #include <asm/arch-at91/at91_pmc.h>
40 #include <asm/arch-at91/at91_pio.h>
46 #include <linux/mii.h>
51 #if (CONFIG_SYS_RX_ETH_BUFFER > 1024)
52 #error AT91 EMAC supports max 1024 RX buffers. \
53 Please decrease the CONFIG_SYS_RX_ETH_BUFFER value
56 #ifndef CONFIG_DRIVER_AT91EMAC_PHYADDR
57 #define CONFIG_DRIVER_AT91EMAC_PHYADDR 0
60 /* MDIO clock must not exceed 2.5 MHz, so enable MCK divider */
61 #if (AT91C_MASTER_CLOCK > 80000000)
62 #define HCLK_DIV AT91_EMAC_CFG_MCLK_64
63 #elif (AT91C_MASTER_CLOCK > 40000000)
64 #define HCLK_DIV AT91_EMAC_CFG_MCLK_32
65 #elif (AT91C_MASTER_CLOCK > 20000000)
66 #define HCLK_DIV AT91_EMAC_CFG_MCLK_16
68 #define HCLK_DIV AT91_EMAC_CFG_MCLK_8
72 #define DEBUG_AT91EMAC 1
74 #define DEBUG_AT91EMAC 0
78 #define DEBUG_AT91PHY 1
80 #define DEBUG_AT91PHY 0
83 #ifndef CONFIG_DRIVER_AT91EMAC_QUIET
89 #define RBF_ADDR 0xfffffffc
90 #define RBF_OWNER (1<<0)
91 #define RBF_WRAP (1<<1)
92 #define RBF_BROADCAST (1<<31)
93 #define RBF_MULTICAST (1<<30)
94 #define RBF_UNICAST (1<<29)
95 #define RBF_EXTERNAL (1<<28)
96 #define RBF_UNKNOWN (1<<27)
97 #define RBF_SIZE 0x07ff
98 #define RBF_LOCAL4 (1<<26)
99 #define RBF_LOCAL3 (1<<25)
100 #define RBF_LOCAL2 (1<<24)
101 #define RBF_LOCAL1 (1<<23)
103 #define RBF_FRAMEMAX CONFIG_SYS_RX_ETH_BUFFER
104 #define RBF_FRAMELEN 0x600
107 unsigned long addr, size;
111 rbf_t rbfdt[RBF_FRAMEMAX];
112 unsigned long rbindex;
115 void at91emac_EnableMDIO(at91_emac_t *at91mac)
117 /* Mac CTRL reg set for MDIO enable */
118 writel(readl(&at91mac->ctl) | AT91_EMAC_CTL_MPE, &at91mac->ctl);
121 void at91emac_DisableMDIO(at91_emac_t *at91mac)
123 /* Mac CTRL reg set for MDIO disable */
124 writel(readl(&at91mac->ctl) & ~AT91_EMAC_CTL_MPE, &at91mac->ctl);
127 int at91emac_read(at91_emac_t *at91mac, unsigned char addr,
128 unsigned char reg, unsigned short *value)
130 unsigned long netstat;
131 at91emac_EnableMDIO(at91mac);
133 writel(AT91_EMAC_MAN_HIGH | AT91_EMAC_MAN_RW_R |
134 AT91_EMAC_MAN_REGA(reg) | AT91_EMAC_MAN_CODE_802_3 |
135 AT91_EMAC_MAN_PHYA(addr),
139 netstat = readl(&at91mac->sr);
140 debug_cond(DEBUG_AT91PHY, "poll SR %08lx\n", netstat);
141 } while (!(netstat & AT91_EMAC_SR_IDLE));
143 *value = readl(&at91mac->man) & AT91_EMAC_MAN_DATA_MASK;
145 at91emac_DisableMDIO(at91mac);
147 debug_cond(DEBUG_AT91PHY,
148 "AT91PHY read %p REG(%d)=%x\n", at91mac, reg, *value);
153 int at91emac_write(at91_emac_t *at91mac, unsigned char addr,
154 unsigned char reg, unsigned short value)
156 unsigned long netstat;
157 debug_cond(DEBUG_AT91PHY,
158 "AT91PHY write %p REG(%d)=%p\n", at91mac, reg, &value);
160 at91emac_EnableMDIO(at91mac);
162 writel(AT91_EMAC_MAN_HIGH | AT91_EMAC_MAN_RW_W |
163 AT91_EMAC_MAN_REGA(reg) | AT91_EMAC_MAN_CODE_802_3 |
164 AT91_EMAC_MAN_PHYA(addr) | (value & AT91_EMAC_MAN_DATA_MASK),
168 netstat = readl(&at91mac->sr);
169 debug_cond(DEBUG_AT91PHY, "poll SR %08lx\n", netstat);
170 } while (!(netstat & AT91_EMAC_SR_IDLE));
172 at91emac_DisableMDIO(at91mac);
177 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
179 at91_emac_t *get_emacbase_by_name(const char *devname)
181 struct eth_device *netdev;
183 netdev = eth_get_dev_by_name(devname);
184 return (at91_emac_t *) netdev->iobase;
187 int at91emac_mii_read(const char *devname, unsigned char addr,
188 unsigned char reg, unsigned short *value)
192 emac = get_emacbase_by_name(devname);
193 at91emac_read(emac , addr, reg, value);
198 int at91emac_mii_write(const char *devname, unsigned char addr,
199 unsigned char reg, unsigned short value)
203 emac = get_emacbase_by_name(devname);
204 at91emac_write(emac, addr, reg, value);
210 static int at91emac_phy_reset(struct eth_device *netdev)
216 emac = (at91_emac_t *) netdev->iobase;
218 adv = ADVERTISE_CSMA | ADVERTISE_ALL;
219 at91emac_write(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
221 debug_cond(VERBOSEP, "%s: Starting autonegotiation...\n", netdev->name);
222 at91emac_write(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR, MII_BMCR,
223 (BMCR_ANENABLE | BMCR_ANRESTART));
225 for (i = 0; i < 30000; i++) {
226 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
228 if (status & BMSR_ANEGCOMPLETE)
233 if (status & BMSR_ANEGCOMPLETE) {
235 "%s: Autonegotiation complete\n", netdev->name);
237 printf("%s: Autonegotiation timed out (status=0x%04x)\n",
238 netdev->name, status);
244 static int at91emac_phy_init(struct eth_device *netdev)
246 u16 phy_id, status, adv, lpa;
247 int media, speed, duplex;
251 emac = (at91_emac_t *) netdev->iobase;
253 /* Check if the PHY is up to snuff... */
254 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
255 MII_PHYSID1, &phy_id);
256 if (phy_id == 0xffff) {
257 printf("%s: No PHY present\n", netdev->name);
261 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
264 if (!(status & BMSR_LSTATUS)) {
265 /* Try to re-negotiate if we don't have link already. */
266 if (at91emac_phy_reset(netdev))
269 for (i = 0; i < 100000 / 100; i++) {
270 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
272 if (status & BMSR_LSTATUS)
277 if (!(status & BMSR_LSTATUS)) {
278 debug_cond(VERBOSEP, "%s: link down\n", netdev->name);
281 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
282 MII_ADVERTISE, &adv);
283 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
285 media = mii_nway_result(lpa & adv);
286 speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)
288 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
289 debug_cond(VERBOSEP, "%s: link up, %sMbps %s-duplex\n",
291 speed ? "100" : "10",
292 duplex ? "full" : "half");
297 int at91emac_UpdateLinkSpeed(at91_emac_t *emac)
299 unsigned short stat1;
301 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR, MII_BMSR, &stat1);
303 if (!(stat1 & BMSR_LSTATUS)) /* link status up? */
306 if (stat1 & BMSR_100FULL) {
307 /*set Emac for 100BaseTX and Full Duplex */
308 writel(readl(&emac->cfg) |
309 AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD,
314 if (stat1 & BMSR_10FULL) {
315 /*set MII for 10BaseT and Full Duplex */
316 writel((readl(&emac->cfg) &
317 ~(AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD)
318 ) | AT91_EMAC_CFG_FD,
323 if (stat1 & BMSR_100HALF) {
324 /*set MII for 100BaseTX and Half Duplex */
325 writel((readl(&emac->cfg) &
326 ~(AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD)
327 ) | AT91_EMAC_CFG_SPD,
332 if (stat1 & BMSR_10HALF) {
333 /*set MII for 10BaseT and Half Duplex */
334 writel((readl(&emac->cfg) &
335 ~(AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD)),
342 static int at91emac_init(struct eth_device *netdev, bd_t *bd)
348 at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIO;
349 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
351 emac = (at91_emac_t *) netdev->iobase;
352 dev = (emac_device *) netdev->priv;
354 /* PIO Disable Register */
355 value = ATMEL_PMX_AA_EMDIO | ATMEL_PMX_AA_EMDC |
356 ATMEL_PMX_AA_ERXER | ATMEL_PMX_AA_ERX1 |
357 ATMEL_PMX_AA_ERX0 | ATMEL_PMX_AA_ECRS |
358 ATMEL_PMX_AA_ETX1 | ATMEL_PMX_AA_ETX0 |
359 ATMEL_PMX_AA_ETXEN | ATMEL_PMX_AA_EREFCK;
361 writel(value, &pio->pioa.pdr);
362 writel(value, &pio->pioa.asr);
365 value = ATMEL_PMX_BA_ERXCK;
367 value = ATMEL_PMX_BA_ERXCK | ATMEL_PMX_BA_ECOL |
368 ATMEL_PMX_BA_ERXDV | ATMEL_PMX_BA_ERX3 |
369 ATMEL_PMX_BA_ERX2 | ATMEL_PMX_BA_ETXER |
370 ATMEL_PMX_BA_ETX3 | ATMEL_PMX_BA_ETX2;
372 writel(value, &pio->piob.pdr);
373 writel(value, &pio->piob.bsr);
375 writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
376 writel(readl(&emac->ctl) | AT91_EMAC_CTL_CSR, &emac->ctl);
378 /* Init Ethernet buffers */
379 for (i = 0; i < RBF_FRAMEMAX; i++) {
380 dev->rbfdt[i].addr = (unsigned long) NetRxPackets[i];
381 dev->rbfdt[i].size = 0;
383 dev->rbfdt[RBF_FRAMEMAX - 1].addr |= RBF_WRAP;
385 writel((u32) &(dev->rbfdt[0]), &emac->rbqp);
387 writel(readl(&emac->rsr) &
388 ~(AT91_EMAC_RSR_OVR | AT91_EMAC_RSR_REC | AT91_EMAC_RSR_BNA),
391 value = AT91_EMAC_CFG_CAF | AT91_EMAC_CFG_NBC |
394 value |= AT91_EMAC_CFG_RMII;
396 writel(value, &emac->cfg);
398 writel(readl(&emac->ctl) | AT91_EMAC_CTL_TE | AT91_EMAC_CTL_RE,
401 if (!at91emac_phy_init(netdev)) {
402 at91emac_UpdateLinkSpeed(emac);
408 static void at91emac_halt(struct eth_device *netdev)
412 emac = (at91_emac_t *) netdev->iobase;
413 writel(readl(&emac->ctl) & ~(AT91_EMAC_CTL_TE | AT91_EMAC_CTL_RE),
415 debug_cond(DEBUG_AT91EMAC, "halt MAC\n");
418 static int at91emac_send(struct eth_device *netdev, void *packet, int length)
422 emac = (at91_emac_t *) netdev->iobase;
424 while (!(readl(&emac->tsr) & AT91_EMAC_TSR_BNQ))
426 writel((u32) packet, &emac->tar);
427 writel(AT91_EMAC_TCR_LEN(length), &emac->tcr);
428 while (AT91_EMAC_TCR_LEN(readl(&emac->tcr)))
430 debug_cond(DEBUG_AT91EMAC, "Send %d\n", length);
431 writel(readl(&emac->tsr) | AT91_EMAC_TSR_COMP, &emac->tsr);
435 static int at91emac_recv(struct eth_device *netdev)
442 emac = (at91_emac_t *) netdev->iobase;
443 dev = (emac_device *) netdev->priv;
445 rbfp = &dev->rbfdt[dev->rbindex];
446 while (rbfp->addr & RBF_OWNER) {
447 size = rbfp->size & RBF_SIZE;
448 NetReceive(NetRxPackets[dev->rbindex], size);
450 debug_cond(DEBUG_AT91EMAC, "Recv[%ld]: %d bytes @ %lx\n",
451 dev->rbindex, size, rbfp->addr);
453 rbfp->addr &= ~RBF_OWNER;
455 if (dev->rbindex < (RBF_FRAMEMAX-1))
460 rbfp = &(dev->rbfdt[dev->rbindex]);
461 if (!(rbfp->addr & RBF_OWNER))
462 writel(readl(&emac->rsr) | AT91_EMAC_RSR_REC,
466 if (readl(&emac->isr) & AT91_EMAC_IxR_RBNA) {
467 /* EMAC silicon bug 41.3.1 workaround 1 */
468 writel(readl(&emac->ctl) & ~AT91_EMAC_CTL_RE, &emac->ctl);
469 writel(readl(&emac->ctl) | AT91_EMAC_CTL_RE, &emac->ctl);
471 printf("%s: reset receiver (EMAC dead lock bug)\n",
477 static int at91emac_write_hwaddr(struct eth_device *netdev)
480 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
481 emac = (at91_emac_t *) netdev->iobase;
483 writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
484 debug_cond(DEBUG_AT91EMAC,
485 "init MAC-ADDR %02x:%02x:%02x:%02x:%02x:%02x\n",
486 netdev->enetaddr[5], netdev->enetaddr[4], netdev->enetaddr[3],
487 netdev->enetaddr[2], netdev->enetaddr[1], netdev->enetaddr[0]);
488 writel( (netdev->enetaddr[0] | netdev->enetaddr[1] << 8 |
489 netdev->enetaddr[2] << 16 | netdev->enetaddr[3] << 24),
491 writel((netdev->enetaddr[4] | netdev->enetaddr[5] << 8), &emac->sa2h);
492 debug_cond(DEBUG_AT91EMAC, "init MAC-ADDR %x%x\n",
493 readl(&emac->sa2h), readl(&emac->sa2l));
497 int at91emac_register(bd_t *bis, unsigned long iobase)
500 emac_device *emacfix;
501 struct eth_device *dev;
504 iobase = ATMEL_BASE_EMAC;
505 emac = malloc(sizeof(*emac)+512);
508 dev = malloc(sizeof(*dev));
513 /* alignment as per Errata (64 bytes) is insufficient! */
514 emacfix = (emac_device *) (((unsigned long) emac + 0x1ff) & 0xFFFFFE00);
515 memset(emacfix, 0, sizeof(emac_device));
517 memset(dev, 0, sizeof(*dev));
518 sprintf(dev->name, "emac");
519 dev->iobase = iobase;
521 dev->init = at91emac_init;
522 dev->halt = at91emac_halt;
523 dev->send = at91emac_send;
524 dev->recv = at91emac_recv;
525 dev->write_hwaddr = at91emac_write_hwaddr;
529 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
530 miiphy_register(dev->name, at91emac_mii_read, at91emac_mii_write);