blob: 0ae0d83e5d2254b1db9b531103a3f88d4b50b7e3 [file] [log] [blame]
Andrew Victord4b77802006-03-24 11:50:17 +02001/*
2 * Ethernet driver for the Atmel AT91RM9200 (Thunder)
3 *
4 * Copyright (C) 2003 SAN People (Pty) Ltd
5 *
6 * Based on an earlier Atmel EMAC macrocell driver by Atmel and Lineo Inc.
7 * Initial version by Rick Bronson 01/11/2003
8 *
9 * Intel LXT971A PHY support by Christopher Bahns & David Knickerbocker
10 * (Polaroid Corporation)
11 *
12 * Realtek RTL8201(B)L PHY support by Roman Avramenko <roman@imsystems.ru>
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version
17 * 2 of the License, or (at your option) any later version.
18 */
19
20#include <linux/module.h>
21#include <linux/init.h>
Andrew Victord4b77802006-03-24 11:50:17 +020022#include <linux/mii.h>
23#include <linux/netdevice.h>
24#include <linux/etherdevice.h>
25#include <linux/skbuff.h>
26#include <linux/dma-mapping.h>
27#include <linux/ethtool.h>
28#include <linux/platform_device.h>
29#include <linux/clk.h>
30
31#include <asm/io.h>
32#include <asm/uaccess.h>
33#include <asm/mach-types.h>
34
35#include <asm/arch/at91rm9200_emac.h>
36#include <asm/arch/gpio.h>
37#include <asm/arch/board.h>
38
39#include "at91_ether.h"
40
41#define DRV_NAME "at91_ether"
42#define DRV_VERSION "1.0"
43
Andrew Victor775637d2006-06-20 11:50:23 +020044#define LINK_POLL_INTERVAL (HZ)
45
Andrew Victord4b77802006-03-24 11:50:17 +020046/* ..................................................................... */
47
48/*
49 * Read from a EMAC register.
50 */
51static inline unsigned long at91_emac_read(unsigned int reg)
52{
53 void __iomem *emac_base = (void __iomem *)AT91_VA_BASE_EMAC;
54
55 return __raw_readl(emac_base + reg);
56}
57
58/*
59 * Write to a EMAC register.
60 */
61static inline void at91_emac_write(unsigned int reg, unsigned long value)
62{
63 void __iomem *emac_base = (void __iomem *)AT91_VA_BASE_EMAC;
64
65 __raw_writel(value, emac_base + reg);
66}
67
68/* ........................... PHY INTERFACE ........................... */
69
70/*
71 * Enable the MDIO bit in MAC control register
72 * When not called from an interrupt-handler, access to the PHY must be
73 * protected by a spinlock.
74 */
75static void enable_mdi(void)
76{
77 unsigned long ctl;
78
79 ctl = at91_emac_read(AT91_EMAC_CTL);
80 at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_MPE); /* enable management port */
81}
82
83/*
84 * Disable the MDIO bit in the MAC control register
85 */
86static void disable_mdi(void)
87{
88 unsigned long ctl;
89
90 ctl = at91_emac_read(AT91_EMAC_CTL);
91 at91_emac_write(AT91_EMAC_CTL, ctl & ~AT91_EMAC_MPE); /* disable management port */
92}
93
94/*
95 * Wait until the PHY operation is complete.
96 */
97static inline void at91_phy_wait(void) {
98 unsigned long timeout = jiffies + 2;
99
100 while (!(at91_emac_read(AT91_EMAC_SR) & AT91_EMAC_SR_IDLE)) {
101 if (time_after(jiffies, timeout)) {
102 printk("at91_ether: MIO timeout\n");
103 break;
104 }
105 cpu_relax();
106 }
107}
108
109/*
110 * Write value to the a PHY register
111 * Note: MDI interface is assumed to already have been enabled.
112 */
113static void write_phy(unsigned char phy_addr, unsigned char address, unsigned int value)
114{
115 at91_emac_write(AT91_EMAC_MAN, AT91_EMAC_MAN_802_3 | AT91_EMAC_RW_W
116 | ((phy_addr & 0x1f) << 23) | (address << 18) | (value & AT91_EMAC_DATA));
117
118 /* Wait until IDLE bit in Network Status register is cleared */
119 at91_phy_wait();
120}
121
122/*
123 * Read value stored in a PHY register.
124 * Note: MDI interface is assumed to already have been enabled.
125 */
126static void read_phy(unsigned char phy_addr, unsigned char address, unsigned int *value)
127{
128 at91_emac_write(AT91_EMAC_MAN, AT91_EMAC_MAN_802_3 | AT91_EMAC_RW_R
129 | ((phy_addr & 0x1f) << 23) | (address << 18));
130
131 /* Wait until IDLE bit in Network Status register is cleared */
132 at91_phy_wait();
133
134 *value = at91_emac_read(AT91_EMAC_MAN) & AT91_EMAC_DATA;
135}
136
137/* ........................... PHY MANAGEMENT .......................... */
138
139/*
140 * Access the PHY to determine the current link speed and mode, and update the
141 * MAC accordingly.
142 * If no link or auto-negotiation is busy, then no changes are made.
143 */
Andrew Victor775637d2006-06-20 11:50:23 +0200144static void update_linkspeed(struct net_device *dev, int silent)
Andrew Victord4b77802006-03-24 11:50:17 +0200145{
Andrew Victorc57ee092006-12-05 15:09:16 +0200146 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200147 unsigned int bmsr, bmcr, lpa, mac_cfg;
148 unsigned int speed, duplex;
149
150 if (!mii_link_ok(&lp->mii)) { /* no link */
151 netif_carrier_off(dev);
Andrew Victor775637d2006-06-20 11:50:23 +0200152 if (!silent)
153 printk(KERN_INFO "%s: Link down.\n", dev->name);
Andrew Victord4b77802006-03-24 11:50:17 +0200154 return;
155 }
156
157 /* Link up, or auto-negotiation still in progress */
158 read_phy(lp->phy_address, MII_BMSR, &bmsr);
159 read_phy(lp->phy_address, MII_BMCR, &bmcr);
160 if (bmcr & BMCR_ANENABLE) { /* AutoNegotiation is enabled */
161 if (!(bmsr & BMSR_ANEGCOMPLETE))
162 return; /* Do nothing - another interrupt generated when negotiation complete */
163
164 read_phy(lp->phy_address, MII_LPA, &lpa);
165 if ((lpa & LPA_100FULL) || (lpa & LPA_100HALF)) speed = SPEED_100;
166 else speed = SPEED_10;
167 if ((lpa & LPA_100FULL) || (lpa & LPA_10FULL)) duplex = DUPLEX_FULL;
168 else duplex = DUPLEX_HALF;
169 } else {
170 speed = (bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
171 duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
172 }
173
174 /* Update the MAC */
175 mac_cfg = at91_emac_read(AT91_EMAC_CFG) & ~(AT91_EMAC_SPD | AT91_EMAC_FD);
176 if (speed == SPEED_100) {
177 if (duplex == DUPLEX_FULL) /* 100 Full Duplex */
178 mac_cfg |= AT91_EMAC_SPD | AT91_EMAC_FD;
179 else /* 100 Half Duplex */
180 mac_cfg |= AT91_EMAC_SPD;
181 } else {
182 if (duplex == DUPLEX_FULL) /* 10 Full Duplex */
183 mac_cfg |= AT91_EMAC_FD;
184 else {} /* 10 Half Duplex */
185 }
186 at91_emac_write(AT91_EMAC_CFG, mac_cfg);
187
Andrew Victor775637d2006-06-20 11:50:23 +0200188 if (!silent)
189 printk(KERN_INFO "%s: Link now %i-%s\n", dev->name, speed, (duplex == DUPLEX_FULL) ? "FullDuplex" : "HalfDuplex");
Andrew Victord4b77802006-03-24 11:50:17 +0200190 netif_carrier_on(dev);
191}
192
193/*
194 * Handle interrupts from the PHY
195 */
David Howells7d12e782006-10-05 14:55:46 +0100196static irqreturn_t at91ether_phy_interrupt(int irq, void *dev_id)
Andrew Victord4b77802006-03-24 11:50:17 +0200197{
198 struct net_device *dev = (struct net_device *) dev_id;
Andrew Victorc57ee092006-12-05 15:09:16 +0200199 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200200 unsigned int phy;
201
202 /*
203 * This hander is triggered on both edges, but the PHY chips expect
204 * level-triggering. We therefore have to check if the PHY actually has
205 * an IRQ pending.
206 */
207 enable_mdi();
208 if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) {
209 read_phy(lp->phy_address, MII_DSINTR_REG, &phy); /* ack interrupt in Davicom PHY */
210 if (!(phy & (1 << 0)))
211 goto done;
212 }
213 else if (lp->phy_type == MII_LXT971A_ID) {
214 read_phy(lp->phy_address, MII_ISINTS_REG, &phy); /* ack interrupt in Intel PHY */
215 if (!(phy & (1 << 2)))
216 goto done;
217 }
218 else if (lp->phy_type == MII_BCM5221_ID) {
219 read_phy(lp->phy_address, MII_BCMINTR_REG, &phy); /* ack interrupt in Broadcom PHY */
220 if (!(phy & (1 << 0)))
221 goto done;
222 }
223 else if (lp->phy_type == MII_KS8721_ID) {
224 read_phy(lp->phy_address, MII_TPISTATUS, &phy); /* ack interrupt in Micrel PHY */
225 if (!(phy & ((1 << 2) | 1)))
226 goto done;
227 }
Andrew Victor6b4aea72007-05-03 09:17:15 +0200228 else if (lp->phy_type == MII_T78Q21x3_ID) { /* ack interrupt in Teridian PHY */
229 read_phy(lp->phy_address, MII_T78Q21INT_REG, &phy);
230 if (!(phy & ((1 << 2) | 1)))
231 goto done;
232 }
233 else if (lp->phy_type == MII_DP83848_ID) {
234 read_phy(lp->phy_address, MII_DPPHYSTS_REG, &phy); /* ack interrupt in DP83848 PHY */
235 if (!(phy & (1 << 7)))
236 goto done;
237 }
Andrew Victord4b77802006-03-24 11:50:17 +0200238
Andrew Victor775637d2006-06-20 11:50:23 +0200239 update_linkspeed(dev, 0);
Andrew Victord4b77802006-03-24 11:50:17 +0200240
241done:
242 disable_mdi();
243
244 return IRQ_HANDLED;
245}
246
247/*
248 * Initialize and enable the PHY interrupt for link-state changes
249 */
250static void enable_phyirq(struct net_device *dev)
251{
Andrew Victorc57ee092006-12-05 15:09:16 +0200252 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200253 unsigned int dsintr, irq_number;
254 int status;
255
Andrew Victord4b77802006-03-24 11:50:17 +0200256 irq_number = lp->board_data.phy_irq_pin;
Andrew Victor775637d2006-06-20 11:50:23 +0200257 if (!irq_number) {
258 /*
259 * PHY doesn't have an IRQ pin (RTL8201, DP83847, AC101L),
260 * or board does not have it connected.
261 */
Andrew Victorcf425532006-12-05 15:21:19 +0200262 mod_timer(&lp->check_timer, jiffies + LINK_POLL_INTERVAL);
Andrew Victor775637d2006-06-20 11:50:23 +0200263 return;
264 }
265
Andrew Victord4b77802006-03-24 11:50:17 +0200266 status = request_irq(irq_number, at91ether_phy_interrupt, 0, dev->name, dev);
267 if (status) {
268 printk(KERN_ERR "at91_ether: PHY IRQ %d request failed - status %d!\n", irq_number, status);
269 return;
270 }
271
272 spin_lock_irq(&lp->lock);
273 enable_mdi();
274
275 if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) { /* for Davicom PHY */
276 read_phy(lp->phy_address, MII_DSINTR_REG, &dsintr);
277 dsintr = dsintr & ~0xf00; /* clear bits 8..11 */
278 write_phy(lp->phy_address, MII_DSINTR_REG, dsintr);
279 }
280 else if (lp->phy_type == MII_LXT971A_ID) { /* for Intel PHY */
281 read_phy(lp->phy_address, MII_ISINTE_REG, &dsintr);
282 dsintr = dsintr | 0xf2; /* set bits 1, 4..7 */
283 write_phy(lp->phy_address, MII_ISINTE_REG, dsintr);
284 }
285 else if (lp->phy_type == MII_BCM5221_ID) { /* for Broadcom PHY */
286 dsintr = (1 << 15) | ( 1 << 14);
287 write_phy(lp->phy_address, MII_BCMINTR_REG, dsintr);
288 }
289 else if (lp->phy_type == MII_KS8721_ID) { /* for Micrel PHY */
290 dsintr = (1 << 10) | ( 1 << 8);
291 write_phy(lp->phy_address, MII_TPISTATUS, dsintr);
292 }
Andrew Victor6b4aea72007-05-03 09:17:15 +0200293 else if (lp->phy_type == MII_T78Q21x3_ID) { /* for Teridian PHY */
294 read_phy(lp->phy_address, MII_T78Q21INT_REG, &dsintr);
295 dsintr = dsintr | 0x500; /* set bits 8, 10 */
296 write_phy(lp->phy_address, MII_T78Q21INT_REG, dsintr);
297 }
298 else if (lp->phy_type == MII_DP83848_ID) { /* National Semiconductor DP83848 PHY */
299 read_phy(lp->phy_address, MII_DPMISR_REG, &dsintr);
300 dsintr = dsintr | 0x3c; /* set bits 2..5 */
301 write_phy(lp->phy_address, MII_DPMISR_REG, dsintr);
302 read_phy(lp->phy_address, MII_DPMICR_REG, &dsintr);
303 dsintr = dsintr | 0x3; /* set bits 0,1 */
304 write_phy(lp->phy_address, MII_DPMICR_REG, dsintr);
305 }
Andrew Victord4b77802006-03-24 11:50:17 +0200306
307 disable_mdi();
308 spin_unlock_irq(&lp->lock);
309}
310
311/*
312 * Disable the PHY interrupt
313 */
314static void disable_phyirq(struct net_device *dev)
315{
Andrew Victorc57ee092006-12-05 15:09:16 +0200316 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200317 unsigned int dsintr;
318 unsigned int irq_number;
319
Andrew Victor775637d2006-06-20 11:50:23 +0200320 irq_number = lp->board_data.phy_irq_pin;
321 if (!irq_number) {
Andrew Victorcf425532006-12-05 15:21:19 +0200322 del_timer_sync(&lp->check_timer);
Andrew Victord4b77802006-03-24 11:50:17 +0200323 return;
Andrew Victor775637d2006-06-20 11:50:23 +0200324 }
Andrew Victord4b77802006-03-24 11:50:17 +0200325
326 spin_lock_irq(&lp->lock);
327 enable_mdi();
328
329 if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) { /* for Davicom PHY */
330 read_phy(lp->phy_address, MII_DSINTR_REG, &dsintr);
331 dsintr = dsintr | 0xf00; /* set bits 8..11 */
332 write_phy(lp->phy_address, MII_DSINTR_REG, dsintr);
333 }
334 else if (lp->phy_type == MII_LXT971A_ID) { /* for Intel PHY */
335 read_phy(lp->phy_address, MII_ISINTE_REG, &dsintr);
336 dsintr = dsintr & ~0xf2; /* clear bits 1, 4..7 */
337 write_phy(lp->phy_address, MII_ISINTE_REG, dsintr);
338 }
339 else if (lp->phy_type == MII_BCM5221_ID) { /* for Broadcom PHY */
340 read_phy(lp->phy_address, MII_BCMINTR_REG, &dsintr);
341 dsintr = ~(1 << 14);
342 write_phy(lp->phy_address, MII_BCMINTR_REG, dsintr);
343 }
344 else if (lp->phy_type == MII_KS8721_ID) { /* for Micrel PHY */
345 read_phy(lp->phy_address, MII_TPISTATUS, &dsintr);
346 dsintr = ~((1 << 10) | (1 << 8));
347 write_phy(lp->phy_address, MII_TPISTATUS, dsintr);
348 }
Andrew Victor6b4aea72007-05-03 09:17:15 +0200349 else if (lp->phy_type == MII_T78Q21x3_ID) { /* for Teridian PHY */
350 read_phy(lp->phy_address, MII_T78Q21INT_REG, &dsintr);
351 dsintr = dsintr & ~0x500; /* clear bits 8, 10 */
352 write_phy(lp->phy_address, MII_T78Q21INT_REG, dsintr);
353 }
354 else if (lp->phy_type == MII_DP83848_ID) { /* National Semiconductor DP83848 PHY */
355 read_phy(lp->phy_address, MII_DPMICR_REG, &dsintr);
356 dsintr = dsintr & ~0x3; /* clear bits 0, 1 */
357 write_phy(lp->phy_address, MII_DPMICR_REG, dsintr);
358 read_phy(lp->phy_address, MII_DPMISR_REG, &dsintr);
359 dsintr = dsintr & ~0x3c; /* clear bits 2..5 */
360 write_phy(lp->phy_address, MII_DPMISR_REG, dsintr);
361 }
Andrew Victord4b77802006-03-24 11:50:17 +0200362
363 disable_mdi();
364 spin_unlock_irq(&lp->lock);
365
Andrew Victord4b77802006-03-24 11:50:17 +0200366 free_irq(irq_number, dev); /* Free interrupt handler */
367}
368
369/*
370 * Perform a software reset of the PHY.
371 */
372#if 0
373static void reset_phy(struct net_device *dev)
374{
Andrew Victorc57ee092006-12-05 15:09:16 +0200375 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200376 unsigned int bmcr;
377
378 spin_lock_irq(&lp->lock);
379 enable_mdi();
380
381 /* Perform PHY reset */
382 write_phy(lp->phy_address, MII_BMCR, BMCR_RESET);
383
384 /* Wait until PHY reset is complete */
385 do {
386 read_phy(lp->phy_address, MII_BMCR, &bmcr);
Roel Kluin10a5a802008-01-29 21:14:56 +0100387 } while (!(bmcr & BMCR_RESET));
Andrew Victord4b77802006-03-24 11:50:17 +0200388
389 disable_mdi();
390 spin_unlock_irq(&lp->lock);
391}
392#endif
393
Andrew Victor775637d2006-06-20 11:50:23 +0200394static void at91ether_check_link(unsigned long dev_id)
395{
396 struct net_device *dev = (struct net_device *) dev_id;
Andrew Victorcf425532006-12-05 15:21:19 +0200397 struct at91_private *lp = netdev_priv(dev);
Andrew Victor775637d2006-06-20 11:50:23 +0200398
399 enable_mdi();
400 update_linkspeed(dev, 1);
401 disable_mdi();
402
Andrew Victorcf425532006-12-05 15:21:19 +0200403 mod_timer(&lp->check_timer, jiffies + LINK_POLL_INTERVAL);
Andrew Victor775637d2006-06-20 11:50:23 +0200404}
405
Andrew Victord4b77802006-03-24 11:50:17 +0200406/* ......................... ADDRESS MANAGEMENT ........................ */
407
408/*
409 * NOTE: Your bootloader must always set the MAC address correctly before
410 * booting into Linux.
411 *
412 * - It must always set the MAC address after reset, even if it doesn't
413 * happen to access the Ethernet while it's booting. Some versions of
414 * U-Boot on the AT91RM9200-DK do not do this.
415 *
416 * - Likewise it must store the addresses in the correct byte order.
417 * MicroMonitor (uMon) on the CSB337 does this incorrectly (and
418 * continues to do so, for bug-compatibility).
419 */
420
421static short __init unpack_mac_address(struct net_device *dev, unsigned int hi, unsigned int lo)
422{
423 char addr[6];
424
425 if (machine_is_csb337()) {
426 addr[5] = (lo & 0xff); /* The CSB337 bootloader stores the MAC the wrong-way around */
427 addr[4] = (lo & 0xff00) >> 8;
428 addr[3] = (lo & 0xff0000) >> 16;
429 addr[2] = (lo & 0xff000000) >> 24;
430 addr[1] = (hi & 0xff);
431 addr[0] = (hi & 0xff00) >> 8;
432 }
433 else {
434 addr[0] = (lo & 0xff);
435 addr[1] = (lo & 0xff00) >> 8;
436 addr[2] = (lo & 0xff0000) >> 16;
437 addr[3] = (lo & 0xff000000) >> 24;
438 addr[4] = (hi & 0xff);
439 addr[5] = (hi & 0xff00) >> 8;
440 }
441
442 if (is_valid_ether_addr(addr)) {
443 memcpy(dev->dev_addr, &addr, 6);
444 return 1;
445 }
446 return 0;
447}
448
449/*
450 * Set the ethernet MAC address in dev->dev_addr
451 */
452static void __init get_mac_address(struct net_device *dev)
453{
454 /* Check Specific-Address 1 */
455 if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA1H), at91_emac_read(AT91_EMAC_SA1L)))
456 return;
457 /* Check Specific-Address 2 */
458 if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA2H), at91_emac_read(AT91_EMAC_SA2L)))
459 return;
460 /* Check Specific-Address 3 */
461 if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA3H), at91_emac_read(AT91_EMAC_SA3L)))
462 return;
463 /* Check Specific-Address 4 */
464 if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA4H), at91_emac_read(AT91_EMAC_SA4L)))
465 return;
466
467 printk(KERN_ERR "at91_ether: Your bootloader did not configure a MAC address.\n");
468}
469
470/*
471 * Program the hardware MAC address from dev->dev_addr.
472 */
473static void update_mac_address(struct net_device *dev)
474{
475 at91_emac_write(AT91_EMAC_SA1L, (dev->dev_addr[3] << 24) | (dev->dev_addr[2] << 16) | (dev->dev_addr[1] << 8) | (dev->dev_addr[0]));
476 at91_emac_write(AT91_EMAC_SA1H, (dev->dev_addr[5] << 8) | (dev->dev_addr[4]));
477
478 at91_emac_write(AT91_EMAC_SA2L, 0);
479 at91_emac_write(AT91_EMAC_SA2H, 0);
480}
481
482/*
483 * Store the new hardware address in dev->dev_addr, and update the MAC.
484 */
485static int set_mac_address(struct net_device *dev, void* addr)
486{
487 struct sockaddr *address = addr;
Joe Perches0795af52007-10-03 17:59:30 -0700488 DECLARE_MAC_BUF(mac);
Andrew Victord4b77802006-03-24 11:50:17 +0200489
490 if (!is_valid_ether_addr(address->sa_data))
491 return -EADDRNOTAVAIL;
492
493 memcpy(dev->dev_addr, address->sa_data, dev->addr_len);
494 update_mac_address(dev);
495
Joe Perches0795af52007-10-03 17:59:30 -0700496 printk("%s: Setting MAC address to %s\n", dev->name,
497 print_mac(mac, dev->dev_addr));
Andrew Victord4b77802006-03-24 11:50:17 +0200498
499 return 0;
500}
501
502static int inline hash_bit_value(int bitnr, __u8 *addr)
503{
504 if (addr[bitnr / 8] & (1 << (bitnr % 8)))
505 return 1;
506 return 0;
507}
508
509/*
510 * The hash address register is 64 bits long and takes up two locations in the memory map.
511 * The least significant bits are stored in EMAC_HSL and the most significant
512 * bits in EMAC_HSH.
513 *
514 * The unicast hash enable and the multicast hash enable bits in the network configuration
515 * register enable the reception of hash matched frames. The destination address is
516 * reduced to a 6 bit index into the 64 bit hash register using the following hash function.
517 * The hash function is an exclusive or of every sixth bit of the destination address.
518 * hash_index[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
519 * hash_index[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
520 * hash_index[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
521 * hash_index[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
522 * hash_index[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
523 * hash_index[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
524 * da[0] represents the least significant bit of the first byte received, that is, the multicast/
525 * unicast indicator, and da[47] represents the most significant bit of the last byte
526 * received.
527 * If the hash index points to a bit that is set in the hash register then the frame will be
528 * matched according to whether the frame is multicast or unicast.
529 * A multicast match will be signalled if the multicast hash enable bit is set, da[0] is 1 and
530 * the hash index points to a bit set in the hash register.
531 * A unicast match will be signalled if the unicast hash enable bit is set, da[0] is 0 and the
532 * hash index points to a bit set in the hash register.
533 * To receive all multicast frames, the hash register should be set with all ones and the
534 * multicast hash enable bit should be set in the network configuration register.
535 */
536
537/*
538 * Return the hash index value for the specified address.
539 */
540static int hash_get_index(__u8 *addr)
541{
542 int i, j, bitval;
543 int hash_index = 0;
544
545 for (j = 0; j < 6; j++) {
546 for (i = 0, bitval = 0; i < 8; i++)
547 bitval ^= hash_bit_value(i*6 + j, addr);
548
549 hash_index |= (bitval << j);
550 }
551
Andrew Victor427d2692006-06-20 12:10:57 +0200552 return hash_index;
Andrew Victord4b77802006-03-24 11:50:17 +0200553}
554
555/*
556 * Add multicast addresses to the internal multicast-hash table.
557 */
558static void at91ether_sethashtable(struct net_device *dev)
559{
560 struct dev_mc_list *curr;
561 unsigned long mc_filter[2];
562 unsigned int i, bitnr;
563
564 mc_filter[0] = mc_filter[1] = 0;
565
566 curr = dev->mc_list;
567 for (i = 0; i < dev->mc_count; i++, curr = curr->next) {
568 if (!curr) break; /* unexpected end of list */
569
570 bitnr = hash_get_index(curr->dmi_addr);
571 mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
572 }
573
Andrew Victor8bc35472007-05-02 12:11:38 +0200574 at91_emac_write(AT91_EMAC_HSL, mc_filter[0]);
575 at91_emac_write(AT91_EMAC_HSH, mc_filter[1]);
Andrew Victord4b77802006-03-24 11:50:17 +0200576}
577
578/*
579 * Enable/Disable promiscuous and multicast modes.
580 */
581static void at91ether_set_rx_mode(struct net_device *dev)
582{
583 unsigned long cfg;
584
585 cfg = at91_emac_read(AT91_EMAC_CFG);
586
587 if (dev->flags & IFF_PROMISC) /* Enable promiscuous mode */
588 cfg |= AT91_EMAC_CAF;
589 else if (dev->flags & (~IFF_PROMISC)) /* Disable promiscuous mode */
590 cfg &= ~AT91_EMAC_CAF;
591
592 if (dev->flags & IFF_ALLMULTI) { /* Enable all multicast mode */
593 at91_emac_write(AT91_EMAC_HSH, -1);
594 at91_emac_write(AT91_EMAC_HSL, -1);
595 cfg |= AT91_EMAC_MTI;
596 } else if (dev->mc_count > 0) { /* Enable specific multicasts */
597 at91ether_sethashtable(dev);
598 cfg |= AT91_EMAC_MTI;
599 } else if (dev->flags & (~IFF_ALLMULTI)) { /* Disable all multicast mode */
600 at91_emac_write(AT91_EMAC_HSH, 0);
601 at91_emac_write(AT91_EMAC_HSL, 0);
602 cfg &= ~AT91_EMAC_MTI;
603 }
604
605 at91_emac_write(AT91_EMAC_CFG, cfg);
606}
607
Andrew Victord4b77802006-03-24 11:50:17 +0200608/* ......................... ETHTOOL SUPPORT ........................... */
609
Andrew Victord4b77802006-03-24 11:50:17 +0200610static int mdio_read(struct net_device *dev, int phy_id, int location)
611{
612 unsigned int value;
613
614 read_phy(phy_id, location, &value);
615 return value;
616}
617
618static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
619{
620 write_phy(phy_id, location, value);
621}
622
623static int at91ether_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
624{
Andrew Victorc57ee092006-12-05 15:09:16 +0200625 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200626 int ret;
627
628 spin_lock_irq(&lp->lock);
629 enable_mdi();
630
631 ret = mii_ethtool_gset(&lp->mii, cmd);
632
633 disable_mdi();
634 spin_unlock_irq(&lp->lock);
635
636 if (lp->phy_media == PORT_FIBRE) { /* override media type since mii.c doesn't know */
637 cmd->supported = SUPPORTED_FIBRE;
638 cmd->port = PORT_FIBRE;
639 }
640
641 return ret;
642}
643
644static int at91ether_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
645{
Andrew Victorc57ee092006-12-05 15:09:16 +0200646 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200647 int ret;
648
649 spin_lock_irq(&lp->lock);
650 enable_mdi();
651
652 ret = mii_ethtool_sset(&lp->mii, cmd);
653
654 disable_mdi();
655 spin_unlock_irq(&lp->lock);
656
657 return ret;
658}
659
660static int at91ether_nwayreset(struct net_device *dev)
661{
Andrew Victorc57ee092006-12-05 15:09:16 +0200662 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200663 int ret;
664
665 spin_lock_irq(&lp->lock);
666 enable_mdi();
667
668 ret = mii_nway_restart(&lp->mii);
669
670 disable_mdi();
671 spin_unlock_irq(&lp->lock);
672
673 return ret;
674}
675
676static void at91ether_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
677{
678 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
679 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700680 strlcpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info));
Andrew Victord4b77802006-03-24 11:50:17 +0200681}
682
Jeff Garzik7282d492006-09-13 14:30:00 -0400683static const struct ethtool_ops at91ether_ethtool_ops = {
Andrew Victord4b77802006-03-24 11:50:17 +0200684 .get_settings = at91ether_get_settings,
685 .set_settings = at91ether_set_settings,
686 .get_drvinfo = at91ether_get_drvinfo,
687 .nway_reset = at91ether_nwayreset,
688 .get_link = ethtool_op_get_link,
689};
690
Andrew Victorca5585e2006-06-20 11:59:05 +0200691static int at91ether_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
692{
Andrew Victorc57ee092006-12-05 15:09:16 +0200693 struct at91_private *lp = netdev_priv(dev);
Andrew Victorca5585e2006-06-20 11:59:05 +0200694 int res;
695
696 if (!netif_running(dev))
697 return -EINVAL;
698
699 spin_lock_irq(&lp->lock);
700 enable_mdi();
701 res = generic_mii_ioctl(&lp->mii, if_mii(rq), cmd, NULL);
702 disable_mdi();
703 spin_unlock_irq(&lp->lock);
704
705 return res;
706}
Andrew Victord4b77802006-03-24 11:50:17 +0200707
708/* ................................ MAC ................................ */
709
710/*
711 * Initialize and start the Receiver and Transmit subsystems
712 */
713static void at91ether_start(struct net_device *dev)
714{
Andrew Victorc57ee092006-12-05 15:09:16 +0200715 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200716 struct recv_desc_bufs *dlist, *dlist_phys;
717 int i;
718 unsigned long ctl;
719
720 dlist = lp->dlist;
721 dlist_phys = lp->dlist_phys;
722
723 for (i = 0; i < MAX_RX_DESCR; i++) {
724 dlist->descriptors[i].addr = (unsigned int) &dlist_phys->recv_buf[i][0];
725 dlist->descriptors[i].size = 0;
726 }
727
728 /* Set the Wrap bit on the last descriptor */
729 dlist->descriptors[i-1].addr |= EMAC_DESC_WRAP;
730
731 /* Reset buffer index */
732 lp->rxBuffIndex = 0;
733
734 /* Program address of descriptor list in Rx Buffer Queue register */
735 at91_emac_write(AT91_EMAC_RBQP, (unsigned long) dlist_phys);
736
737 /* Enable Receive and Transmit */
738 ctl = at91_emac_read(AT91_EMAC_CTL);
739 at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_RE | AT91_EMAC_TE);
740}
741
742/*
743 * Open the ethernet interface
744 */
745static int at91ether_open(struct net_device *dev)
746{
Andrew Victorc57ee092006-12-05 15:09:16 +0200747 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200748 unsigned long ctl;
749
Andrew Victor427d2692006-06-20 12:10:57 +0200750 if (!is_valid_ether_addr(dev->dev_addr))
751 return -EADDRNOTAVAIL;
Andrew Victord4b77802006-03-24 11:50:17 +0200752
Andrew Victor427d2692006-06-20 12:10:57 +0200753 clk_enable(lp->ether_clk); /* Re-enable Peripheral clock */
Andrew Victord4b77802006-03-24 11:50:17 +0200754
755 /* Clear internal statistics */
756 ctl = at91_emac_read(AT91_EMAC_CTL);
757 at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_CSR);
758
759 /* Update the MAC address (incase user has changed it) */
760 update_mac_address(dev);
761
762 /* Enable PHY interrupt */
763 enable_phyirq(dev);
764
765 /* Enable MAC interrupts */
766 at91_emac_write(AT91_EMAC_IER, AT91_EMAC_RCOM | AT91_EMAC_RBNA
767 | AT91_EMAC_TUND | AT91_EMAC_RTRY | AT91_EMAC_TCOM
768 | AT91_EMAC_ROVR | AT91_EMAC_ABT);
769
770 /* Determine current link speed */
771 spin_lock_irq(&lp->lock);
772 enable_mdi();
Andrew Victor775637d2006-06-20 11:50:23 +0200773 update_linkspeed(dev, 0);
Andrew Victord4b77802006-03-24 11:50:17 +0200774 disable_mdi();
775 spin_unlock_irq(&lp->lock);
776
777 at91ether_start(dev);
778 netif_start_queue(dev);
779 return 0;
780}
781
782/*
783 * Close the interface
784 */
785static int at91ether_close(struct net_device *dev)
786{
Andrew Victorc57ee092006-12-05 15:09:16 +0200787 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200788 unsigned long ctl;
789
790 /* Disable Receiver and Transmitter */
791 ctl = at91_emac_read(AT91_EMAC_CTL);
792 at91_emac_write(AT91_EMAC_CTL, ctl & ~(AT91_EMAC_TE | AT91_EMAC_RE));
793
794 /* Disable PHY interrupt */
795 disable_phyirq(dev);
796
797 /* Disable MAC interrupts */
798 at91_emac_write(AT91_EMAC_IDR, AT91_EMAC_RCOM | AT91_EMAC_RBNA
799 | AT91_EMAC_TUND | AT91_EMAC_RTRY | AT91_EMAC_TCOM
800 | AT91_EMAC_ROVR | AT91_EMAC_ABT);
801
802 netif_stop_queue(dev);
803
Andrew Victor427d2692006-06-20 12:10:57 +0200804 clk_disable(lp->ether_clk); /* Disable Peripheral clock */
Andrew Victord4b77802006-03-24 11:50:17 +0200805
806 return 0;
807}
808
809/*
810 * Transmit packet.
811 */
812static int at91ether_tx(struct sk_buff *skb, struct net_device *dev)
813{
Andrew Victorc57ee092006-12-05 15:09:16 +0200814 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200815
816 if (at91_emac_read(AT91_EMAC_TSR) & AT91_EMAC_TSR_BNQ) {
817 netif_stop_queue(dev);
818
819 /* Store packet information (to free when Tx completed) */
820 lp->skb = skb;
821 lp->skb_length = skb->len;
822 lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len, DMA_TO_DEVICE);
823 lp->stats.tx_bytes += skb->len;
824
825 /* Set address of the data in the Transmit Address register */
826 at91_emac_write(AT91_EMAC_TAR, lp->skb_physaddr);
827 /* Set length of the packet in the Transmit Control register */
828 at91_emac_write(AT91_EMAC_TCR, skb->len);
829
830 dev->trans_start = jiffies;
831 } else {
832 printk(KERN_ERR "at91_ether.c: at91ether_tx() called, but device is busy!\n");
833 return 1; /* if we return anything but zero, dev.c:1055 calls kfree_skb(skb)
834 on this skb, he also reports -ENETDOWN and printk's, so either
835 we free and return(0) or don't free and return 1 */
836 }
837
838 return 0;
839}
840
841/*
842 * Update the current statistics from the internal statistics registers.
843 */
844static struct net_device_stats *at91ether_stats(struct net_device *dev)
845{
Andrew Victorc57ee092006-12-05 15:09:16 +0200846 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200847 int ale, lenerr, seqe, lcol, ecol;
848
849 if (netif_running(dev)) {
850 lp->stats.rx_packets += at91_emac_read(AT91_EMAC_OK); /* Good frames received */
851 ale = at91_emac_read(AT91_EMAC_ALE);
852 lp->stats.rx_frame_errors += ale; /* Alignment errors */
853 lenerr = at91_emac_read(AT91_EMAC_ELR) + at91_emac_read(AT91_EMAC_USF);
854 lp->stats.rx_length_errors += lenerr; /* Excessive Length or Undersize Frame error */
855 seqe = at91_emac_read(AT91_EMAC_SEQE);
856 lp->stats.rx_crc_errors += seqe; /* CRC error */
857 lp->stats.rx_fifo_errors += at91_emac_read(AT91_EMAC_DRFC); /* Receive buffer not available */
858 lp->stats.rx_errors += (ale + lenerr + seqe
859 + at91_emac_read(AT91_EMAC_CDE) + at91_emac_read(AT91_EMAC_RJB));
860
861 lp->stats.tx_packets += at91_emac_read(AT91_EMAC_FRA); /* Frames successfully transmitted */
862 lp->stats.tx_fifo_errors += at91_emac_read(AT91_EMAC_TUE); /* Transmit FIFO underruns */
863 lp->stats.tx_carrier_errors += at91_emac_read(AT91_EMAC_CSE); /* Carrier Sense errors */
864 lp->stats.tx_heartbeat_errors += at91_emac_read(AT91_EMAC_SQEE);/* Heartbeat error */
865
866 lcol = at91_emac_read(AT91_EMAC_LCOL);
867 ecol = at91_emac_read(AT91_EMAC_ECOL);
868 lp->stats.tx_window_errors += lcol; /* Late collisions */
869 lp->stats.tx_aborted_errors += ecol; /* 16 collisions */
870
871 lp->stats.collisions += (at91_emac_read(AT91_EMAC_SCOL) + at91_emac_read(AT91_EMAC_MCOL) + lcol + ecol);
872 }
873 return &lp->stats;
874}
875
876/*
877 * Extract received frame from buffer descriptors and sent to upper layers.
878 * (Called from interrupt context)
879 */
880static void at91ether_rx(struct net_device *dev)
881{
Andrew Victorc57ee092006-12-05 15:09:16 +0200882 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200883 struct recv_desc_bufs *dlist;
884 unsigned char *p_recv;
885 struct sk_buff *skb;
886 unsigned int pktlen;
887
888 dlist = lp->dlist;
889 while (dlist->descriptors[lp->rxBuffIndex].addr & EMAC_DESC_DONE) {
890 p_recv = dlist->recv_buf[lp->rxBuffIndex];
891 pktlen = dlist->descriptors[lp->rxBuffIndex].size & 0x7ff; /* Length of frame including FCS */
Andrew Victora3f63e42006-12-05 15:37:02 +0200892 skb = dev_alloc_skb(pktlen + 2);
Andrew Victord4b77802006-03-24 11:50:17 +0200893 if (skb != NULL) {
894 skb_reserve(skb, 2);
895 memcpy(skb_put(skb, pktlen), p_recv, pktlen);
896
Andrew Victord4b77802006-03-24 11:50:17 +0200897 skb->protocol = eth_type_trans(skb, dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200898 dev->last_rx = jiffies;
899 lp->stats.rx_bytes += pktlen;
900 netif_rx(skb);
901 }
902 else {
903 lp->stats.rx_dropped += 1;
904 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
905 }
906
907 if (dlist->descriptors[lp->rxBuffIndex].size & EMAC_MULTICAST)
908 lp->stats.multicast++;
909
910 dlist->descriptors[lp->rxBuffIndex].addr &= ~EMAC_DESC_DONE; /* reset ownership bit */
911 if (lp->rxBuffIndex == MAX_RX_DESCR-1) /* wrap after last buffer */
912 lp->rxBuffIndex = 0;
913 else
914 lp->rxBuffIndex++;
915 }
916}
917
918/*
919 * MAC interrupt handler
920 */
David Howells7d12e782006-10-05 14:55:46 +0100921static irqreturn_t at91ether_interrupt(int irq, void *dev_id)
Andrew Victord4b77802006-03-24 11:50:17 +0200922{
923 struct net_device *dev = (struct net_device *) dev_id;
Andrew Victorc57ee092006-12-05 15:09:16 +0200924 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200925 unsigned long intstatus, ctl;
926
927 /* MAC Interrupt Status register indicates what interrupts are pending.
928 It is automatically cleared once read. */
929 intstatus = at91_emac_read(AT91_EMAC_ISR);
930
931 if (intstatus & AT91_EMAC_RCOM) /* Receive complete */
932 at91ether_rx(dev);
933
Andrew Victor427d2692006-06-20 12:10:57 +0200934 if (intstatus & AT91_EMAC_TCOM) { /* Transmit complete */
Andrew Victord4b77802006-03-24 11:50:17 +0200935 /* The TCOM bit is set even if the transmission failed. */
936 if (intstatus & (AT91_EMAC_TUND | AT91_EMAC_RTRY))
937 lp->stats.tx_errors += 1;
938
939 if (lp->skb) {
940 dev_kfree_skb_irq(lp->skb);
941 lp->skb = NULL;
942 dma_unmap_single(NULL, lp->skb_physaddr, lp->skb_length, DMA_TO_DEVICE);
943 }
944 netif_wake_queue(dev);
945 }
946
947 /* Work-around for Errata #11 */
948 if (intstatus & AT91_EMAC_RBNA) {
949 ctl = at91_emac_read(AT91_EMAC_CTL);
950 at91_emac_write(AT91_EMAC_CTL, ctl & ~AT91_EMAC_RE);
951 at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_RE);
952 }
953
954 if (intstatus & AT91_EMAC_ROVR)
955 printk("%s: ROVR error\n", dev->name);
956
957 return IRQ_HANDLED;
958}
959
Andrew Victor51cc2102006-12-05 15:33:05 +0200960#ifdef CONFIG_NET_POLL_CONTROLLER
961static void at91ether_poll_controller(struct net_device *dev)
962{
963 unsigned long flags;
964
965 local_irq_save(flags);
966 at91ether_interrupt(dev->irq, dev);
967 local_irq_restore(flags);
968}
969#endif
970
Andrew Victord4b77802006-03-24 11:50:17 +0200971/*
972 * Initialize the ethernet interface
973 */
Andrew Victor427d2692006-06-20 12:10:57 +0200974static int __init at91ether_setup(unsigned long phy_type, unsigned short phy_address,
975 struct platform_device *pdev, struct clk *ether_clk)
Andrew Victord4b77802006-03-24 11:50:17 +0200976{
977 struct at91_eth_data *board_data = pdev->dev.platform_data;
978 struct net_device *dev;
979 struct at91_private *lp;
980 unsigned int val;
981 int res;
Joe Perches0795af52007-10-03 17:59:30 -0700982 DECLARE_MAC_BUF(mac);
Andrew Victord4b77802006-03-24 11:50:17 +0200983
Andrew Victord4b77802006-03-24 11:50:17 +0200984 dev = alloc_etherdev(sizeof(struct at91_private));
985 if (!dev)
986 return -ENOMEM;
987
988 dev->base_addr = AT91_VA_BASE_EMAC;
Andrew Victor72729912006-09-27 09:44:11 +0100989 dev->irq = AT91RM9200_ID_EMAC;
Andrew Victord4b77802006-03-24 11:50:17 +0200990
991 /* Install the interrupt handler */
992 if (request_irq(dev->irq, at91ether_interrupt, 0, dev->name, dev)) {
993 free_netdev(dev);
994 return -EBUSY;
995 }
996
997 /* Allocate memory for DMA Receive descriptors */
Andrew Victorc57ee092006-12-05 15:09:16 +0200998 lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +0200999 lp->dlist = (struct recv_desc_bufs *) dma_alloc_coherent(NULL, sizeof(struct recv_desc_bufs), (dma_addr_t *) &lp->dlist_phys, GFP_KERNEL);
1000 if (lp->dlist == NULL) {
1001 free_irq(dev->irq, dev);
1002 free_netdev(dev);
1003 return -ENOMEM;
1004 }
1005 lp->board_data = *board_data;
Andrew Victor427d2692006-06-20 12:10:57 +02001006 lp->ether_clk = ether_clk;
Andrew Victord4b77802006-03-24 11:50:17 +02001007 platform_set_drvdata(pdev, dev);
1008
1009 spin_lock_init(&lp->lock);
1010
1011 ether_setup(dev);
1012 dev->open = at91ether_open;
1013 dev->stop = at91ether_close;
1014 dev->hard_start_xmit = at91ether_tx;
1015 dev->get_stats = at91ether_stats;
1016 dev->set_multicast_list = at91ether_set_rx_mode;
1017 dev->set_mac_address = set_mac_address;
1018 dev->ethtool_ops = &at91ether_ethtool_ops;
Andrew Victorca5585e2006-06-20 11:59:05 +02001019 dev->do_ioctl = at91ether_ioctl;
Andrew Victor51cc2102006-12-05 15:33:05 +02001020#ifdef CONFIG_NET_POLL_CONTROLLER
1021 dev->poll_controller = at91ether_poll_controller;
1022#endif
Andrew Victord4b77802006-03-24 11:50:17 +02001023
1024 SET_NETDEV_DEV(dev, &pdev->dev);
1025
1026 get_mac_address(dev); /* Get ethernet address and store it in dev->dev_addr */
1027 update_mac_address(dev); /* Program ethernet address into MAC */
1028
1029 at91_emac_write(AT91_EMAC_CTL, 0);
1030
1031 if (lp->board_data.is_rmii)
1032 at91_emac_write(AT91_EMAC_CFG, AT91_EMAC_CLK_DIV32 | AT91_EMAC_BIG | AT91_EMAC_RMII);
1033 else
1034 at91_emac_write(AT91_EMAC_CFG, AT91_EMAC_CLK_DIV32 | AT91_EMAC_BIG);
1035
1036 /* Perform PHY-specific initialization */
1037 spin_lock_irq(&lp->lock);
1038 enable_mdi();
1039 if ((phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) {
1040 read_phy(phy_address, MII_DSCR_REG, &val);
1041 if ((val & (1 << 10)) == 0) /* DSCR bit 10 is 0 -- fiber mode */
1042 lp->phy_media = PORT_FIBRE;
1043 } else if (machine_is_csb337()) {
1044 /* mix link activity status into LED2 link state */
1045 write_phy(phy_address, MII_LEDCTRL_REG, 0x0d22);
1046 }
1047 disable_mdi();
1048 spin_unlock_irq(&lp->lock);
1049
1050 lp->mii.dev = dev; /* Support for ethtool */
1051 lp->mii.mdio_read = mdio_read;
1052 lp->mii.mdio_write = mdio_write;
Andrew Victorca5585e2006-06-20 11:59:05 +02001053 lp->mii.phy_id = phy_address;
1054 lp->mii.phy_id_mask = 0x1f;
1055 lp->mii.reg_num_mask = 0x1f;
Andrew Victord4b77802006-03-24 11:50:17 +02001056
1057 lp->phy_type = phy_type; /* Type of PHY connected */
1058 lp->phy_address = phy_address; /* MDI address of PHY */
1059
1060 /* Register the network interface */
1061 res = register_netdev(dev);
1062 if (res) {
1063 free_irq(dev->irq, dev);
1064 free_netdev(dev);
1065 dma_free_coherent(NULL, sizeof(struct recv_desc_bufs), lp->dlist, (dma_addr_t)lp->dlist_phys);
1066 return res;
1067 }
Andrew Victord4b77802006-03-24 11:50:17 +02001068
1069 /* Determine current link speed */
1070 spin_lock_irq(&lp->lock);
1071 enable_mdi();
Andrew Victor775637d2006-06-20 11:50:23 +02001072 update_linkspeed(dev, 0);
Andrew Victord4b77802006-03-24 11:50:17 +02001073 disable_mdi();
1074 spin_unlock_irq(&lp->lock);
1075 netif_carrier_off(dev); /* will be enabled in open() */
1076
Andrew Victor775637d2006-06-20 11:50:23 +02001077 /* If board has no PHY IRQ, use a timer to poll the PHY */
1078 if (!lp->board_data.phy_irq_pin) {
Andrew Victorcf425532006-12-05 15:21:19 +02001079 init_timer(&lp->check_timer);
1080 lp->check_timer.data = (unsigned long)dev;
1081 lp->check_timer.function = at91ether_check_link;
Andrew Victor775637d2006-06-20 11:50:23 +02001082 }
1083
Andrew Victord4b77802006-03-24 11:50:17 +02001084 /* Display ethernet banner */
Joe Perches0795af52007-10-03 17:59:30 -07001085 printk(KERN_INFO "%s: AT91 ethernet at 0x%08x int=%d %s%s (%s)\n",
1086 dev->name, (uint) dev->base_addr, dev->irq,
1087 at91_emac_read(AT91_EMAC_CFG) & AT91_EMAC_SPD ? "100-" : "10-",
1088 at91_emac_read(AT91_EMAC_CFG) & AT91_EMAC_FD ? "FullDuplex" : "HalfDuplex",
1089 print_mac(mac, dev->dev_addr));
Andrew Victord4b77802006-03-24 11:50:17 +02001090 if ((phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID))
Andrew Victor427d2692006-06-20 12:10:57 +02001091 printk(KERN_INFO "%s: Davicom 9161 PHY %s\n", dev->name, (lp->phy_media == PORT_FIBRE) ? "(Fiber)" : "(Copper)");
Andrew Victord4b77802006-03-24 11:50:17 +02001092 else if (phy_type == MII_LXT971A_ID)
1093 printk(KERN_INFO "%s: Intel LXT971A PHY\n", dev->name);
1094 else if (phy_type == MII_RTL8201_ID)
1095 printk(KERN_INFO "%s: Realtek RTL8201(B)L PHY\n", dev->name);
1096 else if (phy_type == MII_BCM5221_ID)
1097 printk(KERN_INFO "%s: Broadcom BCM5221 PHY\n", dev->name);
1098 else if (phy_type == MII_DP83847_ID)
1099 printk(KERN_INFO "%s: National Semiconductor DP83847 PHY\n", dev->name);
Andrew Victor6b4aea72007-05-03 09:17:15 +02001100 else if (phy_type == MII_DP83848_ID)
1101 printk(KERN_INFO "%s: National Semiconductor DP83848 PHY\n", dev->name);
Andrew Victord4b77802006-03-24 11:50:17 +02001102 else if (phy_type == MII_AC101L_ID)
1103 printk(KERN_INFO "%s: Altima AC101L PHY\n", dev->name);
1104 else if (phy_type == MII_KS8721_ID)
1105 printk(KERN_INFO "%s: Micrel KS8721 PHY\n", dev->name);
Andrew Victor6b4aea72007-05-03 09:17:15 +02001106 else if (phy_type == MII_T78Q21x3_ID)
1107 printk(KERN_INFO "%s: Teridian 78Q21x3 PHY\n", dev->name);
1108 else if (phy_type == MII_LAN83C185_ID)
1109 printk(KERN_INFO "%s: SMSC LAN83C185 PHY\n", dev->name);
Andrew Victord4b77802006-03-24 11:50:17 +02001110
1111 return 0;
1112}
1113
1114/*
1115 * Detect MAC and PHY and perform initialization
1116 */
1117static int __init at91ether_probe(struct platform_device *pdev)
1118{
1119 unsigned int phyid1, phyid2;
1120 int detected = -1;
1121 unsigned long phy_id;
1122 unsigned short phy_address = 0;
Andrew Victor427d2692006-06-20 12:10:57 +02001123 struct clk *ether_clk;
Andrew Victord4b77802006-03-24 11:50:17 +02001124
1125 ether_clk = clk_get(&pdev->dev, "ether_clk");
Andrew Victor427d2692006-06-20 12:10:57 +02001126 if (IS_ERR(ether_clk)) {
Andrew Victord4b77802006-03-24 11:50:17 +02001127 printk(KERN_ERR "at91_ether: no clock defined\n");
1128 return -ENODEV;
1129 }
1130 clk_enable(ether_clk); /* Enable Peripheral clock */
1131
1132 while ((detected != 0) && (phy_address < 32)) {
1133 /* Read the PHY ID registers */
1134 enable_mdi();
1135 read_phy(phy_address, MII_PHYSID1, &phyid1);
1136 read_phy(phy_address, MII_PHYSID2, &phyid2);
1137 disable_mdi();
1138
1139 phy_id = (phyid1 << 16) | (phyid2 & 0xfff0);
1140 switch (phy_id) {
1141 case MII_DM9161_ID: /* Davicom 9161: PHY_ID1 = 0x181, PHY_ID2 = B881 */
1142 case MII_DM9161A_ID: /* Davicom 9161A: PHY_ID1 = 0x181, PHY_ID2 = B8A0 */
1143 case MII_LXT971A_ID: /* Intel LXT971A: PHY_ID1 = 0x13, PHY_ID2 = 78E0 */
1144 case MII_RTL8201_ID: /* Realtek RTL8201: PHY_ID1 = 0, PHY_ID2 = 0x8201 */
1145 case MII_BCM5221_ID: /* Broadcom BCM5221: PHY_ID1 = 0x40, PHY_ID2 = 0x61e0 */
1146 case MII_DP83847_ID: /* National Semiconductor DP83847: */
Andrew Victor6b4aea72007-05-03 09:17:15 +02001147 case MII_DP83848_ID: /* National Semiconductor DP83848: */
Andrew Victord4b77802006-03-24 11:50:17 +02001148 case MII_AC101L_ID: /* Altima AC101L: PHY_ID1 = 0x22, PHY_ID2 = 0x5520 */
1149 case MII_KS8721_ID: /* Micrel KS8721: PHY_ID1 = 0x22, PHY_ID2 = 0x1610 */
Andrew Victor6b4aea72007-05-03 09:17:15 +02001150 case MII_T78Q21x3_ID: /* Teridian 78Q21x3: PHY_ID1 = 0x0E, PHY_ID2 = 7237 */
1151 case MII_LAN83C185_ID: /* SMSC LAN83C185: PHY_ID1 = 0x0007, PHY_ID2 = 0xC0A1 */
Andrew Victor427d2692006-06-20 12:10:57 +02001152 detected = at91ether_setup(phy_id, phy_address, pdev, ether_clk);
Andrew Victord4b77802006-03-24 11:50:17 +02001153 break;
1154 }
1155
1156 phy_address++;
1157 }
1158
1159 clk_disable(ether_clk); /* Disable Peripheral clock */
1160
1161 return detected;
1162}
1163
1164static int __devexit at91ether_remove(struct platform_device *pdev)
1165{
Andrew Victorc57ee092006-12-05 15:09:16 +02001166 struct net_device *dev = platform_get_drvdata(pdev);
1167 struct at91_private *lp = netdev_priv(dev);
Andrew Victord4b77802006-03-24 11:50:17 +02001168
Andrew Victorc57ee092006-12-05 15:09:16 +02001169 unregister_netdev(dev);
1170 free_irq(dev->irq, dev);
Andrew Victord4b77802006-03-24 11:50:17 +02001171 dma_free_coherent(NULL, sizeof(struct recv_desc_bufs), lp->dlist, (dma_addr_t)lp->dlist_phys);
Andrew Victor427d2692006-06-20 12:10:57 +02001172 clk_put(lp->ether_clk);
Andrew Victord4b77802006-03-24 11:50:17 +02001173
Andrew Victorc57ee092006-12-05 15:09:16 +02001174 platform_set_drvdata(pdev, NULL);
1175 free_netdev(dev);
Andrew Victord4b77802006-03-24 11:50:17 +02001176 return 0;
1177}
1178
Andrew Victor00e5edc2006-06-20 12:19:13 +02001179#ifdef CONFIG_PM
1180
1181static int at91ether_suspend(struct platform_device *pdev, pm_message_t mesg)
1182{
Andrew Victor00e5edc2006-06-20 12:19:13 +02001183 struct net_device *net_dev = platform_get_drvdata(pdev);
Andrew Victorc57ee092006-12-05 15:09:16 +02001184 struct at91_private *lp = netdev_priv(net_dev);
Andrew Victor00e5edc2006-06-20 12:19:13 +02001185 int phy_irq = lp->board_data.phy_irq_pin;
1186
1187 if (netif_running(net_dev)) {
1188 if (phy_irq)
1189 disable_irq(phy_irq);
1190
1191 netif_stop_queue(net_dev);
1192 netif_device_detach(net_dev);
1193
1194 clk_disable(lp->ether_clk);
1195 }
1196 return 0;
1197}
1198
1199static int at91ether_resume(struct platform_device *pdev)
1200{
Andrew Victor00e5edc2006-06-20 12:19:13 +02001201 struct net_device *net_dev = platform_get_drvdata(pdev);
Andrew Victorc57ee092006-12-05 15:09:16 +02001202 struct at91_private *lp = netdev_priv(net_dev);
Andrew Victor00e5edc2006-06-20 12:19:13 +02001203 int phy_irq = lp->board_data.phy_irq_pin;
1204
1205 if (netif_running(net_dev)) {
1206 clk_enable(lp->ether_clk);
1207
1208 netif_device_attach(net_dev);
1209 netif_start_queue(net_dev);
1210
1211 if (phy_irq)
1212 enable_irq(phy_irq);
1213 }
1214 return 0;
1215}
1216
1217#else
1218#define at91ether_suspend NULL
1219#define at91ether_resume NULL
1220#endif
1221
Andrew Victord4b77802006-03-24 11:50:17 +02001222static struct platform_driver at91ether_driver = {
1223 .probe = at91ether_probe,
1224 .remove = __devexit_p(at91ether_remove),
Andrew Victor00e5edc2006-06-20 12:19:13 +02001225 .suspend = at91ether_suspend,
1226 .resume = at91ether_resume,
Andrew Victord4b77802006-03-24 11:50:17 +02001227 .driver = {
1228 .name = DRV_NAME,
1229 .owner = THIS_MODULE,
1230 },
1231};
1232
1233static int __init at91ether_init(void)
1234{
1235 return platform_driver_register(&at91ether_driver);
1236}
1237
1238static void __exit at91ether_exit(void)
1239{
1240 platform_driver_unregister(&at91ether_driver);
1241}
1242
1243module_init(at91ether_init)
1244module_exit(at91ether_exit)
1245
1246MODULE_LICENSE("GPL");
1247MODULE_DESCRIPTION("AT91RM9200 EMAC Ethernet driver");
1248MODULE_AUTHOR("Andrew Victor");