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(...) printf(__VA_ARGS__);
74 #define DEBUG_AT91EMAC(...)
78 #define DEBUG_AT91PHY(...) printf(__VA_ARGS__);
80 #define DEBUG_AT91PHY(...)
83 #ifndef CONFIG_DRIVER_AT91EMAC_QUIET
84 #define VERBOSEP(...) printf(__VA_ARGS__);
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_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_AT91PHY("AT91PHY read %x REG(%d)=%x\n", at91mac, reg, *value)
152 int at91emac_write(at91_emac_t *at91mac, unsigned char addr,
153 unsigned char reg, unsigned short value)
155 unsigned long netstat;
156 DEBUG_AT91PHY("AT91PHY write %x REG(%d)=%x\n", at91mac, reg, &value)
158 at91emac_EnableMDIO(at91mac);
160 writel(AT91_EMAC_MAN_HIGH | AT91_EMAC_MAN_RW_W |
161 AT91_EMAC_MAN_REGA(reg) | AT91_EMAC_MAN_CODE_802_3 |
162 AT91_EMAC_MAN_PHYA(addr) | (value & AT91_EMAC_MAN_DATA_MASK),
166 netstat = readl(&at91mac->sr);
167 DEBUG_AT91PHY("poll SR %08lx\n", netstat);
168 } while (!(netstat & AT91_EMAC_SR_IDLE));
170 at91emac_DisableMDIO(at91mac);
175 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
177 at91_emac_t *get_emacbase_by_name(const char *devname)
179 struct eth_device *netdev;
181 netdev = eth_get_dev_by_name(devname);
182 return (at91_emac_t *) netdev->iobase;
185 int at91emac_mii_read(const char *devname, unsigned char addr,
186 unsigned char reg, unsigned short *value)
190 emac = get_emacbase_by_name(devname);
191 at91emac_read(emac , addr, reg, value);
196 int at91emac_mii_write(const char *devname, unsigned char addr,
197 unsigned char reg, unsigned short value)
201 emac = get_emacbase_by_name(devname);
202 at91emac_write(emac, addr, reg, value);
208 static int at91emac_phy_reset(struct eth_device *netdev)
214 emac = (at91_emac_t *) netdev->iobase;
216 adv = ADVERTISE_CSMA | ADVERTISE_ALL;
217 at91emac_write(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
219 VERBOSEP("%s: Starting autonegotiation...\n", netdev->name);
220 at91emac_write(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR, MII_BMCR,
221 (BMCR_ANENABLE | BMCR_ANRESTART));
223 for (i = 0; i < 30000; i++) {
224 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
226 if (status & BMSR_ANEGCOMPLETE)
231 if (status & BMSR_ANEGCOMPLETE) {
232 VERBOSEP("%s: Autonegotiation complete\n", netdev->name);
234 printf("%s: Autonegotiation timed out (status=0x%04x)\n",
235 netdev->name, status);
241 static int at91emac_phy_init(struct eth_device *netdev)
243 u16 phy_id, status, adv, lpa;
244 int media, speed, duplex;
248 emac = (at91_emac_t *) netdev->iobase;
250 /* Check if the PHY is up to snuff... */
251 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
252 MII_PHYSID1, &phy_id);
253 if (phy_id == 0xffff) {
254 printf("%s: No PHY present\n", netdev->name);
258 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
261 if (!(status & BMSR_LSTATUS)) {
262 /* Try to re-negotiate if we don't have link already. */
263 if (at91emac_phy_reset(netdev))
266 for (i = 0; i < 100000 / 100; i++) {
267 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
269 if (status & BMSR_LSTATUS)
274 if (!(status & BMSR_LSTATUS)) {
275 VERBOSEP("%s: link down\n", netdev->name);
278 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
279 MII_ADVERTISE, &adv);
280 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR,
282 media = mii_nway_result(lpa & adv);
283 speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)
285 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
286 VERBOSEP("%s: link up, %sMbps %s-duplex\n",
288 speed ? "100" : "10",
289 duplex ? "full" : "half");
294 int at91emac_UpdateLinkSpeed(at91_emac_t *emac)
296 unsigned short stat1;
298 at91emac_read(emac, CONFIG_DRIVER_AT91EMAC_PHYADDR, MII_BMSR, &stat1);
300 if (!(stat1 & BMSR_LSTATUS)) /* link status up? */
303 if (stat1 & BMSR_100FULL) {
304 /*set Emac for 100BaseTX and Full Duplex */
305 writel(readl(&emac->cfg) |
306 AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD,
311 if (stat1 & BMSR_10FULL) {
312 /*set MII for 10BaseT and Full Duplex */
313 writel((readl(&emac->cfg) &
314 ~(AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD)
315 ) | AT91_EMAC_CFG_FD,
320 if (stat1 & BMSR_100HALF) {
321 /*set MII for 100BaseTX and Half Duplex */
322 writel((readl(&emac->cfg) &
323 ~(AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD)
324 ) | AT91_EMAC_CFG_SPD,
329 if (stat1 & BMSR_10HALF) {
330 /*set MII for 10BaseT and Half Duplex */
331 writel((readl(&emac->cfg) &
332 ~(AT91_EMAC_CFG_SPD | AT91_EMAC_CFG_FD)),
339 static int at91emac_init(struct eth_device *netdev, bd_t *bd)
345 at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIO;
346 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
348 emac = (at91_emac_t *) netdev->iobase;
349 dev = (emac_device *) netdev->priv;
351 /* PIO Disable Register */
352 value = ATMEL_PMX_AA_EMDIO | ATMEL_PMX_AA_EMDC |
353 ATMEL_PMX_AA_ERXER | ATMEL_PMX_AA_ERX1 |
354 ATMEL_PMX_AA_ERX0 | ATMEL_PMX_AA_ECRS |
355 ATMEL_PMX_AA_ETX1 | ATMEL_PMX_AA_ETX0 |
356 ATMEL_PMX_AA_ETXEN | ATMEL_PMX_AA_EREFCK;
358 writel(value, &pio->pioa.pdr);
359 writel(value, &pio->pioa.asr);
362 value = ATMEL_PMX_BA_ERXCK;
364 value = ATMEL_PMX_BA_ERXCK | ATMEL_PMX_BA_ECOL |
365 ATMEL_PMX_BA_ERXDV | ATMEL_PMX_BA_ERX3 |
366 ATMEL_PMX_BA_ERX2 | ATMEL_PMX_BA_ETXER |
367 ATMEL_PMX_BA_ETX3 | ATMEL_PMX_BA_ETX2;
369 writel(value, &pio->piob.pdr);
370 writel(value, &pio->piob.bsr);
372 writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
373 writel(readl(&emac->ctl) | AT91_EMAC_CTL_CSR, &emac->ctl);
375 /* Init Ethernet buffers */
376 for (i = 0; i < RBF_FRAMEMAX; i++) {
377 dev->rbfdt[i].addr = (unsigned long) NetRxPackets[i];
378 dev->rbfdt[i].size = 0;
380 dev->rbfdt[RBF_FRAMEMAX - 1].addr |= RBF_WRAP;
382 writel((u32) &(dev->rbfdt[0]), &emac->rbqp);
384 writel(readl(&emac->rsr) &
385 ~(AT91_EMAC_RSR_OVR | AT91_EMAC_RSR_REC | AT91_EMAC_RSR_BNA),
388 value = AT91_EMAC_CFG_CAF | AT91_EMAC_CFG_NBC |
391 value |= AT91_EMAC_CFG_RMII;
393 writel(value, &emac->cfg);
395 writel(readl(&emac->ctl) | AT91_EMAC_CTL_TE | AT91_EMAC_CTL_RE,
398 if (!at91emac_phy_init(netdev)) {
399 at91emac_UpdateLinkSpeed(emac);
405 static void at91emac_halt(struct eth_device *netdev)
409 emac = (at91_emac_t *) netdev->iobase;
410 writel(readl(&emac->ctl) & ~(AT91_EMAC_CTL_TE | AT91_EMAC_CTL_RE),
412 DEBUG_AT91EMAC("halt MAC\n");
415 static int at91emac_send(struct eth_device *netdev, volatile void *packet,
420 emac = (at91_emac_t *) netdev->iobase;
422 while (!(readl(&emac->tsr) & AT91_EMAC_TSR_BNQ))
424 writel((u32) packet, &emac->tar);
425 writel(AT91_EMAC_TCR_LEN(length), &emac->tcr);
426 while (AT91_EMAC_TCR_LEN(readl(&emac->tcr)))
428 DEBUG_AT91EMAC("Send %d \n", length);
429 writel(readl(&emac->tsr) | AT91_EMAC_TSR_COMP, &emac->tsr);
433 static int at91emac_recv(struct eth_device *netdev)
440 emac = (at91_emac_t *) netdev->iobase;
441 dev = (emac_device *) netdev->priv;
443 rbfp = &dev->rbfdt[dev->rbindex];
444 while (rbfp->addr & RBF_OWNER) {
445 size = rbfp->size & RBF_SIZE;
446 NetReceive(NetRxPackets[dev->rbindex], size);
448 DEBUG_AT91EMAC("Recv[%d]: %d bytes @ %x \n",
449 dev->rbindex, size, rbfp->addr);
451 rbfp->addr &= ~RBF_OWNER;
453 if (dev->rbindex < (RBF_FRAMEMAX-1))
458 rbfp = &(dev->rbfdt[dev->rbindex]);
459 if (!(rbfp->addr & RBF_OWNER))
460 writel(readl(&emac->rsr) | AT91_EMAC_RSR_REC,
464 if (readl(&emac->isr) & AT91_EMAC_IxR_RBNA) {
465 /* EMAC silicon bug 41.3.1 workaround 1 */
466 writel(readl(&emac->ctl) & ~AT91_EMAC_CTL_RE, &emac->ctl);
467 writel(readl(&emac->ctl) | AT91_EMAC_CTL_RE, &emac->ctl);
469 printf("%s: reset receiver (EMAC dead lock bug)\n",
475 static int at91emac_write_hwaddr(struct eth_device *netdev)
479 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
480 emac = (at91_emac_t *) netdev->iobase;
481 dev = (emac_device *) netdev->priv;
483 writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
484 DEBUG_AT91EMAC("init MAC-ADDR %02x:%02x:%02x:%02x:%02x:%02x\n",
485 netdev->enetaddr[5], netdev->enetaddr[4], netdev->enetaddr[3],
486 netdev->enetaddr[2], netdev->enetaddr[1], netdev->enetaddr[0]);
487 writel( (netdev->enetaddr[0] | netdev->enetaddr[1] << 8 |
488 netdev->enetaddr[2] << 16 | netdev->enetaddr[3] << 24),
490 writel((netdev->enetaddr[4] | netdev->enetaddr[5] << 8), &emac->sa2h);
491 DEBUG_AT91EMAC("init MAC-ADDR %x%x \n",
492 readl(&emac->sa2h), readl(&emac->sa2l));
496 int at91emac_register(bd_t *bis, unsigned long iobase)
499 emac_device *emacfix;
500 struct eth_device *dev;
503 iobase = ATMEL_BASE_EMAC;
504 emac = malloc(sizeof(*emac)+512);
507 dev = malloc(sizeof(*dev));
512 /* alignment as per Errata (64 bytes) is insufficient! */
513 emacfix = (emac_device *) (((unsigned long) emac + 0x1ff) & 0xFFFFFE00);
514 memset(emacfix, 0, sizeof(emac_device));
516 memset(dev, 0, sizeof(*dev));
517 sprintf(dev->name, "emac");
518 dev->iobase = iobase;
520 dev->init = at91emac_init;
521 dev->halt = at91emac_halt;
522 dev->send = at91emac_send;
523 dev->recv = at91emac_recv;
524 dev->write_hwaddr = at91emac_write_hwaddr;
528 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
529 miiphy_register(dev->name, at91emac_mii_read, at91emac_mii_write);