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authorAndrew Victor <andrew@sanpeople.com>2006-03-24 04:50:17 -0500
committerJeff Garzik <jeff@garzik.org>2006-03-24 12:10:55 -0500
commitd4b7780ea1d2e08410fcc9963a57254147ae577a (patch)
tree3625bc3f6f0220b348793e9dc1e1a131899b49c9
parente93252faca2eb1a14b44369705be7c79eba2f037 (diff)
[PATCH] AT91RM9200 Ethernet driver
This patch adds support for the Ethernet controller integrated in the Atmel AT91RM9200 SoC processor. Changes since the previous submission (01/02/2006) are: - Make use of the clk.h clock infrastructure. - The multicast hash function is not crc32. [Patch by Pedro Perez] Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat
-rw-r--r--drivers/net/arm/Kconfig8
-rw-r--r--drivers/net/arm/Makefile1
-rw-r--r--drivers/net/arm/at91_ether.c1110
-rw-r--r--drivers/net/arm/at91_ether.h101
-rw-r--r--include/asm-arm/arch-at91rm9200/at91rm9200_emac.h138
5 files changed, 1358 insertions, 0 deletions
diff --git a/drivers/net/arm/Kconfig b/drivers/net/arm/Kconfig
index 625184b65e38..77fe20dbea35 100644
--- a/drivers/net/arm/Kconfig
+++ b/drivers/net/arm/Kconfig
@@ -31,3 +31,11 @@ config ARM_ETHERH
31 help 31 help
32 If you have an Acorn system with one of these network cards, you 32 If you have an Acorn system with one of these network cards, you
33 should say Y to this option if you wish to use it with Linux. 33 should say Y to this option if you wish to use it with Linux.
34
35config ARM_AT91_ETHER
36 tristate "AT91RM9200 Ethernet support"
37 depends on NET_ETHERNET && ARM && ARCH_AT91RM9200
38 select MII
39 help
40 If you wish to compile a kernel for the AT91RM9200 and enable
41 ethernet support, then you should always answer Y to this.
diff --git a/drivers/net/arm/Makefile b/drivers/net/arm/Makefile
index bc263edf06a7..42c95b79c261 100644
--- a/drivers/net/arm/Makefile
+++ b/drivers/net/arm/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_ARM_AM79C961A) += am79c961a.o
7obj-$(CONFIG_ARM_ETHERH) += etherh.o 7obj-$(CONFIG_ARM_ETHERH) += etherh.o
8obj-$(CONFIG_ARM_ETHER3) += ether3.o 8obj-$(CONFIG_ARM_ETHER3) += ether3.o
9obj-$(CONFIG_ARM_ETHER1) += ether1.o 9obj-$(CONFIG_ARM_ETHER1) += ether1.o
10obj-$(CONFIG_ARM_AT91_ETHER) += at91_ether.o
diff --git a/drivers/net/arm/at91_ether.c b/drivers/net/arm/at91_ether.c
new file mode 100644
index 000000000000..5503dc8a66e4
--- /dev/null
+++ b/drivers/net/arm/at91_ether.c
@@ -0,0 +1,1110 @@
1/*
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>
22#include <linux/config.h>
23#include <linux/mii.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/skbuff.h>
27#include <linux/dma-mapping.h>
28#include <linux/ethtool.h>
29#include <linux/platform_device.h>
30#include <linux/clk.h>
31
32#include <asm/io.h>
33#include <asm/uaccess.h>
34#include <asm/mach-types.h>
35
36#include <asm/arch/at91rm9200_emac.h>
37#include <asm/arch/gpio.h>
38#include <asm/arch/board.h>
39
40#include "at91_ether.h"
41
42#define DRV_NAME "at91_ether"
43#define DRV_VERSION "1.0"
44
45static struct net_device *at91_dev;
46static struct clk *ether_clk;
47
48/* ..................................................................... */
49
50/*
51 * Read from a EMAC register.
52 */
53static inline unsigned long at91_emac_read(unsigned int reg)
54{
55 void __iomem *emac_base = (void __iomem *)AT91_VA_BASE_EMAC;
56
57 return __raw_readl(emac_base + reg);
58}
59
60/*
61 * Write to a EMAC register.
62 */
63static inline void at91_emac_write(unsigned int reg, unsigned long value)
64{
65 void __iomem *emac_base = (void __iomem *)AT91_VA_BASE_EMAC;
66
67 __raw_writel(value, emac_base + reg);
68}
69
70/* ........................... PHY INTERFACE ........................... */
71
72/*
73 * Enable the MDIO bit in MAC control register
74 * When not called from an interrupt-handler, access to the PHY must be
75 * protected by a spinlock.
76 */
77static void enable_mdi(void)
78{
79 unsigned long ctl;
80
81 ctl = at91_emac_read(AT91_EMAC_CTL);
82 at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_MPE); /* enable management port */
83}
84
85/*
86 * Disable the MDIO bit in the MAC control register
87 */
88static void disable_mdi(void)
89{
90 unsigned long ctl;
91
92 ctl = at91_emac_read(AT91_EMAC_CTL);
93 at91_emac_write(AT91_EMAC_CTL, ctl & ~AT91_EMAC_MPE); /* disable management port */
94}
95
96/*
97 * Wait until the PHY operation is complete.
98 */
99static inline void at91_phy_wait(void) {
100 unsigned long timeout = jiffies + 2;
101
102 while (!(at91_emac_read(AT91_EMAC_SR) & AT91_EMAC_SR_IDLE)) {
103 if (time_after(jiffies, timeout)) {
104 printk("at91_ether: MIO timeout\n");
105 break;
106 }
107 cpu_relax();
108 }
109}
110
111/*
112 * Write value to the a PHY register
113 * Note: MDI interface is assumed to already have been enabled.
114 */
115static void write_phy(unsigned char phy_addr, unsigned char address, unsigned int value)
116{
117 at91_emac_write(AT91_EMAC_MAN, AT91_EMAC_MAN_802_3 | AT91_EMAC_RW_W
118 | ((phy_addr & 0x1f) << 23) | (address << 18) | (value & AT91_EMAC_DATA));
119
120 /* Wait until IDLE bit in Network Status register is cleared */
121 at91_phy_wait();
122}
123
124/*
125 * Read value stored in a PHY register.
126 * Note: MDI interface is assumed to already have been enabled.
127 */
128static void read_phy(unsigned char phy_addr, unsigned char address, unsigned int *value)
129{
130 at91_emac_write(AT91_EMAC_MAN, AT91_EMAC_MAN_802_3 | AT91_EMAC_RW_R
131 | ((phy_addr & 0x1f) << 23) | (address << 18));
132
133 /* Wait until IDLE bit in Network Status register is cleared */
134 at91_phy_wait();
135
136 *value = at91_emac_read(AT91_EMAC_MAN) & AT91_EMAC_DATA;
137}
138
139/* ........................... PHY MANAGEMENT .......................... */
140
141/*
142 * Access the PHY to determine the current link speed and mode, and update the
143 * MAC accordingly.
144 * If no link or auto-negotiation is busy, then no changes are made.
145 */
146static void update_linkspeed(struct net_device *dev)
147{
148 struct at91_private *lp = (struct at91_private *) dev->priv;
149 unsigned int bmsr, bmcr, lpa, mac_cfg;
150 unsigned int speed, duplex;
151
152 if (!mii_link_ok(&lp->mii)) { /* no link */
153 netif_carrier_off(dev);
154 printk(KERN_INFO "%s: Link down.\n", dev->name);
155 return;
156 }
157
158 /* Link up, or auto-negotiation still in progress */
159 read_phy(lp->phy_address, MII_BMSR, &bmsr);
160 read_phy(lp->phy_address, MII_BMCR, &bmcr);
161 if (bmcr & BMCR_ANENABLE) { /* AutoNegotiation is enabled */
162 if (!(bmsr & BMSR_ANEGCOMPLETE))
163 return; /* Do nothing - another interrupt generated when negotiation complete */
164
165 read_phy(lp->phy_address, MII_LPA, &lpa);
166 if ((lpa & LPA_100FULL) || (lpa & LPA_100HALF)) speed = SPEED_100;
167 else speed = SPEED_10;
168 if ((lpa & LPA_100FULL) || (lpa & LPA_10FULL)) duplex = DUPLEX_FULL;
169 else duplex = DUPLEX_HALF;
170 } else {
171 speed = (bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
172 duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
173 }
174
175 /* Update the MAC */
176 mac_cfg = at91_emac_read(AT91_EMAC_CFG) & ~(AT91_EMAC_SPD | AT91_EMAC_FD);
177 if (speed == SPEED_100) {
178 if (duplex == DUPLEX_FULL) /* 100 Full Duplex */
179 mac_cfg |= AT91_EMAC_SPD | AT91_EMAC_FD;
180 else /* 100 Half Duplex */
181 mac_cfg |= AT91_EMAC_SPD;
182 } else {
183 if (duplex == DUPLEX_FULL) /* 10 Full Duplex */
184 mac_cfg |= AT91_EMAC_FD;
185 else {} /* 10 Half Duplex */
186 }
187 at91_emac_write(AT91_EMAC_CFG, mac_cfg);
188
189 printk(KERN_INFO "%s: Link now %i-%s\n", dev->name, speed, (duplex == DUPLEX_FULL) ? "FullDuplex" : "HalfDuplex");
190 netif_carrier_on(dev);
191}
192
193/*
194 * Handle interrupts from the PHY
195 */
196static irqreturn_t at91ether_phy_interrupt(int irq, void *dev_id, struct pt_regs *regs)
197{
198 struct net_device *dev = (struct net_device *) dev_id;
199 struct at91_private *lp = (struct at91_private *) dev->priv;
200 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 }
228
229 update_linkspeed(dev);
230
231done:
232 disable_mdi();
233
234 return IRQ_HANDLED;
235}
236
237/*
238 * Initialize and enable the PHY interrupt for link-state changes
239 */
240static void enable_phyirq(struct net_device *dev)
241{
242 struct at91_private *lp = (struct at91_private *) dev->priv;
243 unsigned int dsintr, irq_number;
244 int status;
245
246 if (lp->phy_type == MII_RTL8201_ID) /* RTL8201 does not have an interrupt */
247 return;
248 if (lp->phy_type == MII_DP83847_ID) /* DP83847 does not have an interrupt */
249 return;
250 if (lp->phy_type == MII_AC101L_ID) /* AC101L interrupt not supported yet */
251 return;
252
253 irq_number = lp->board_data.phy_irq_pin;
254 status = request_irq(irq_number, at91ether_phy_interrupt, 0, dev->name, dev);
255 if (status) {
256 printk(KERN_ERR "at91_ether: PHY IRQ %d request failed - status %d!\n", irq_number, status);
257 return;
258 }
259
260 spin_lock_irq(&lp->lock);
261 enable_mdi();
262
263 if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) { /* for Davicom PHY */
264 read_phy(lp->phy_address, MII_DSINTR_REG, &dsintr);
265 dsintr = dsintr & ~0xf00; /* clear bits 8..11 */
266 write_phy(lp->phy_address, MII_DSINTR_REG, dsintr);
267 }
268 else if (lp->phy_type == MII_LXT971A_ID) { /* for Intel PHY */
269 read_phy(lp->phy_address, MII_ISINTE_REG, &dsintr);
270 dsintr = dsintr | 0xf2; /* set bits 1, 4..7 */
271 write_phy(lp->phy_address, MII_ISINTE_REG, dsintr);
272 }
273 else if (lp->phy_type == MII_BCM5221_ID) { /* for Broadcom PHY */
274 dsintr = (1 << 15) | ( 1 << 14);
275 write_phy(lp->phy_address, MII_BCMINTR_REG, dsintr);
276 }
277 else if (lp->phy_type == MII_KS8721_ID) { /* for Micrel PHY */
278 dsintr = (1 << 10) | ( 1 << 8);
279 write_phy(lp->phy_address, MII_TPISTATUS, dsintr);
280 }
281
282 disable_mdi();
283 spin_unlock_irq(&lp->lock);
284}
285
286/*
287 * Disable the PHY interrupt
288 */
289static void disable_phyirq(struct net_device *dev)
290{
291 struct at91_private *lp = (struct at91_private *) dev->priv;
292 unsigned int dsintr;
293 unsigned int irq_number;
294
295 if (lp->phy_type == MII_RTL8201_ID) /* RTL8201 does not have an interrupt */
296 return;
297 if (lp->phy_type == MII_DP83847_ID) /* DP83847 does not have an interrupt */
298 return;
299 if (lp->phy_type == MII_AC101L_ID) /* AC101L interrupt not supported yet */
300 return;
301
302 spin_lock_irq(&lp->lock);
303 enable_mdi();
304
305 if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) { /* for Davicom PHY */
306 read_phy(lp->phy_address, MII_DSINTR_REG, &dsintr);
307 dsintr = dsintr | 0xf00; /* set bits 8..11 */
308 write_phy(lp->phy_address, MII_DSINTR_REG, dsintr);
309 }
310 else if (lp->phy_type == MII_LXT971A_ID) { /* for Intel PHY */
311 read_phy(lp->phy_address, MII_ISINTE_REG, &dsintr);
312 dsintr = dsintr & ~0xf2; /* clear bits 1, 4..7 */
313 write_phy(lp->phy_address, MII_ISINTE_REG, dsintr);
314 }
315 else if (lp->phy_type == MII_BCM5221_ID) { /* for Broadcom PHY */
316 read_phy(lp->phy_address, MII_BCMINTR_REG, &dsintr);
317 dsintr = ~(1 << 14);
318 write_phy(lp->phy_address, MII_BCMINTR_REG, dsintr);
319 }
320 else if (lp->phy_type == MII_KS8721_ID) { /* for Micrel PHY */
321 read_phy(lp->phy_address, MII_TPISTATUS, &dsintr);
322 dsintr = ~((1 << 10) | (1 << 8));
323 write_phy(lp->phy_address, MII_TPISTATUS, dsintr);
324 }
325
326 disable_mdi();
327 spin_unlock_irq(&lp->lock);
328
329 irq_number = lp->board_data.phy_irq_pin;
330 free_irq(irq_number, dev); /* Free interrupt handler */
331}
332
333/*
334 * Perform a software reset of the PHY.
335 */
336#if 0
337static void reset_phy(struct net_device *dev)
338{
339 struct at91_private *lp = (struct at91_private *) dev->priv;
340 unsigned int bmcr;
341
342 spin_lock_irq(&lp->lock);
343 enable_mdi();
344
345 /* Perform PHY reset */
346 write_phy(lp->phy_address, MII_BMCR, BMCR_RESET);
347
348 /* Wait until PHY reset is complete */
349 do {
350 read_phy(lp->phy_address, MII_BMCR, &bmcr);
351 } while (!(bmcr && BMCR_RESET));
352
353 disable_mdi();
354 spin_unlock_irq(&lp->lock);
355}
356#endif
357
358/* ......................... ADDRESS MANAGEMENT ........................ */
359
360/*
361 * NOTE: Your bootloader must always set the MAC address correctly before
362 * booting into Linux.
363 *
364 * - It must always set the MAC address after reset, even if it doesn't
365 * happen to access the Ethernet while it's booting. Some versions of
366 * U-Boot on the AT91RM9200-DK do not do this.
367 *
368 * - Likewise it must store the addresses in the correct byte order.
369 * MicroMonitor (uMon) on the CSB337 does this incorrectly (and
370 * continues to do so, for bug-compatibility).
371 */
372
373static short __init unpack_mac_address(struct net_device *dev, unsigned int hi, unsigned int lo)
374{
375 char addr[6];
376
377 if (machine_is_csb337()) {
378 addr[5] = (lo & 0xff); /* The CSB337 bootloader stores the MAC the wrong-way around */
379 addr[4] = (lo & 0xff00) >> 8;
380 addr[3] = (lo & 0xff0000) >> 16;
381 addr[2] = (lo & 0xff000000) >> 24;
382 addr[1] = (hi & 0xff);
383 addr[0] = (hi & 0xff00) >> 8;
384 }
385 else {
386 addr[0] = (lo & 0xff);
387 addr[1] = (lo & 0xff00) >> 8;
388 addr[2] = (lo & 0xff0000) >> 16;
389 addr[3] = (lo & 0xff000000) >> 24;
390 addr[4] = (hi & 0xff);
391 addr[5] = (hi & 0xff00) >> 8;
392 }
393
394 if (is_valid_ether_addr(addr)) {
395 memcpy(dev->dev_addr, &addr, 6);
396 return 1;
397 }
398 return 0;
399}
400
401/*
402 * Set the ethernet MAC address in dev->dev_addr
403 */
404static void __init get_mac_address(struct net_device *dev)
405{
406 /* Check Specific-Address 1 */
407 if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA1H), at91_emac_read(AT91_EMAC_SA1L)))
408 return;
409 /* Check Specific-Address 2 */
410 if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA2H), at91_emac_read(AT91_EMAC_SA2L)))
411 return;
412 /* Check Specific-Address 3 */
413 if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA3H), at91_emac_read(AT91_EMAC_SA3L)))
414 return;
415 /* Check Specific-Address 4 */
416 if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA4H), at91_emac_read(AT91_EMAC_SA4L)))
417 return;
418
419 printk(KERN_ERR "at91_ether: Your bootloader did not configure a MAC address.\n");
420}
421
422/*
423 * Program the hardware MAC address from dev->dev_addr.
424 */
425static void update_mac_address(struct net_device *dev)
426{
427 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]));
428 at91_emac_write(AT91_EMAC_SA1H, (dev->dev_addr[5] << 8) | (dev->dev_addr[4]));
429
430 at91_emac_write(AT91_EMAC_SA2L, 0);
431 at91_emac_write(AT91_EMAC_SA2H, 0);
432}
433
434/*
435 * Store the new hardware address in dev->dev_addr, and update the MAC.
436 */
437static int set_mac_address(struct net_device *dev, void* addr)
438{
439 struct sockaddr *address = addr;
440
441 if (!is_valid_ether_addr(address->sa_data))
442 return -EADDRNOTAVAIL;
443
444 memcpy(dev->dev_addr, address->sa_data, dev->addr_len);
445 update_mac_address(dev);
446
447 printk("%s: Setting MAC address to %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name,
448 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
449 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
450
451 return 0;
452}
453
454static int inline hash_bit_value(int bitnr, __u8 *addr)
455{
456 if (addr[bitnr / 8] & (1 << (bitnr % 8)))
457 return 1;
458 return 0;
459}
460
461/*
462 * The hash address register is 64 bits long and takes up two locations in the memory map.
463 * The least significant bits are stored in EMAC_HSL and the most significant
464 * bits in EMAC_HSH.
465 *
466 * The unicast hash enable and the multicast hash enable bits in the network configuration
467 * register enable the reception of hash matched frames. The destination address is
468 * reduced to a 6 bit index into the 64 bit hash register using the following hash function.
469 * The hash function is an exclusive or of every sixth bit of the destination address.
470 * hash_index[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
471 * hash_index[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
472 * hash_index[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
473 * hash_index[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
474 * hash_index[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
475 * hash_index[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
476 * da[0] represents the least significant bit of the first byte received, that is, the multicast/
477 * unicast indicator, and da[47] represents the most significant bit of the last byte
478 * received.
479 * If the hash index points to a bit that is set in the hash register then the frame will be
480 * matched according to whether the frame is multicast or unicast.
481 * A multicast match will be signalled if the multicast hash enable bit is set, da[0] is 1 and
482 * the hash index points to a bit set in the hash register.
483 * A unicast match will be signalled if the unicast hash enable bit is set, da[0] is 0 and the
484 * hash index points to a bit set in the hash register.
485 * To receive all multicast frames, the hash register should be set with all ones and the
486 * multicast hash enable bit should be set in the network configuration register.
487 */
488
489/*
490 * Return the hash index value for the specified address.
491 */
492static int hash_get_index(__u8 *addr)
493{
494 int i, j, bitval;
495 int hash_index = 0;
496
497 for (j = 0; j < 6; j++) {
498 for (i = 0, bitval = 0; i < 8; i++)
499 bitval ^= hash_bit_value(i*6 + j, addr);
500
501 hash_index |= (bitval << j);
502 }
503
504 return hash_index;
505}
506
507/*
508 * Add multicast addresses to the internal multicast-hash table.
509 */
510static void at91ether_sethashtable(struct net_device *dev)
511{
512 struct dev_mc_list *curr;
513 unsigned long mc_filter[2];
514 unsigned int i, bitnr;
515
516 mc_filter[0] = mc_filter[1] = 0;
517
518 curr = dev->mc_list;
519 for (i = 0; i < dev->mc_count; i++, curr = curr->next) {
520 if (!curr) break; /* unexpected end of list */
521
522 bitnr = hash_get_index(curr->dmi_addr);
523 mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
524 }
525
526 at91_emac_write(AT91_EMAC_HSH, mc_filter[0]);
527 at91_emac_write(AT91_EMAC_HSL, mc_filter[1]);
528}
529
530/*
531 * Enable/Disable promiscuous and multicast modes.
532 */
533static void at91ether_set_rx_mode(struct net_device *dev)
534{
535 unsigned long cfg;
536
537 cfg = at91_emac_read(AT91_EMAC_CFG);
538
539 if (dev->flags & IFF_PROMISC) /* Enable promiscuous mode */
540 cfg |= AT91_EMAC_CAF;
541 else if (dev->flags & (~IFF_PROMISC)) /* Disable promiscuous mode */
542 cfg &= ~AT91_EMAC_CAF;
543
544 if (dev->flags & IFF_ALLMULTI) { /* Enable all multicast mode */
545 at91_emac_write(AT91_EMAC_HSH, -1);
546 at91_emac_write(AT91_EMAC_HSL, -1);
547 cfg |= AT91_EMAC_MTI;
548 } else if (dev->mc_count > 0) { /* Enable specific multicasts */
549 at91ether_sethashtable(dev);
550 cfg |= AT91_EMAC_MTI;
551 } else if (dev->flags & (~IFF_ALLMULTI)) { /* Disable all multicast mode */
552 at91_emac_write(AT91_EMAC_HSH, 0);
553 at91_emac_write(AT91_EMAC_HSL, 0);
554 cfg &= ~AT91_EMAC_MTI;
555 }
556
557 at91_emac_write(AT91_EMAC_CFG, cfg);
558}
559
560
561/* ......................... ETHTOOL SUPPORT ........................... */
562
563
564static int mdio_read(struct net_device *dev, int phy_id, int location)
565{
566 unsigned int value;
567
568 read_phy(phy_id, location, &value);
569 return value;
570}
571
572static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
573{
574 write_phy(phy_id, location, value);
575}
576
577static int at91ether_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
578{
579 struct at91_private *lp = (struct at91_private *) dev->priv;
580 int ret;
581
582 spin_lock_irq(&lp->lock);
583 enable_mdi();
584
585 ret = mii_ethtool_gset(&lp->mii, cmd);
586
587 disable_mdi();
588 spin_unlock_irq(&lp->lock);
589
590 if (lp->phy_media == PORT_FIBRE) { /* override media type since mii.c doesn't know */
591 cmd->supported = SUPPORTED_FIBRE;
592 cmd->port = PORT_FIBRE;
593 }
594
595 return ret;
596}
597
598static int at91ether_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
599{
600 struct at91_private *lp = (struct at91_private *) dev->priv;
601 int ret;
602
603 spin_lock_irq(&lp->lock);
604 enable_mdi();
605
606 ret = mii_ethtool_sset(&lp->mii, cmd);
607
608 disable_mdi();
609 spin_unlock_irq(&lp->lock);
610
611 return ret;
612}
613
614static int at91ether_nwayreset(struct net_device *dev)
615{
616 struct at91_private *lp = (struct at91_private *) dev->priv;
617 int ret;
618
619 spin_lock_irq(&lp->lock);
620 enable_mdi();
621
622 ret = mii_nway_restart(&lp->mii);
623
624 disable_mdi();
625 spin_unlock_irq(&lp->lock);
626
627 return ret;
628}
629
630static void at91ether_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
631{
632 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
633 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
634 strlcpy(info->bus_info, dev->class_dev.dev->bus_id, sizeof(info->bus_info));
635}
636
637static struct ethtool_ops at91ether_ethtool_ops = {
638 .get_settings = at91ether_get_settings,
639 .set_settings = at91ether_set_settings,
640 .get_drvinfo = at91ether_get_drvinfo,
641 .nway_reset = at91ether_nwayreset,
642 .get_link = ethtool_op_get_link,
643};
644
645
646/* ................................ MAC ................................ */
647
648/*
649 * Initialize and start the Receiver and Transmit subsystems
650 */
651static void at91ether_start(struct net_device *dev)
652{
653 struct at91_private *lp = (struct at91_private *) dev->priv;
654 struct recv_desc_bufs *dlist, *dlist_phys;
655 int i;
656 unsigned long ctl;
657
658 dlist = lp->dlist;
659 dlist_phys = lp->dlist_phys;
660
661 for (i = 0; i < MAX_RX_DESCR; i++) {
662 dlist->descriptors[i].addr = (unsigned int) &dlist_phys->recv_buf[i][0];
663 dlist->descriptors[i].size = 0;
664 }
665
666 /* Set the Wrap bit on the last descriptor */
667 dlist->descriptors[i-1].addr |= EMAC_DESC_WRAP;
668
669 /* Reset buffer index */
670 lp->rxBuffIndex = 0;
671
672 /* Program address of descriptor list in Rx Buffer Queue register */
673 at91_emac_write(AT91_EMAC_RBQP, (unsigned long) dlist_phys);
674
675 /* Enable Receive and Transmit */
676 ctl = at91_emac_read(AT91_EMAC_CTL);
677 at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_RE | AT91_EMAC_TE);
678}
679
680/*
681 * Open the ethernet interface
682 */
683static int at91ether_open(struct net_device *dev)
684{
685 struct at91_private *lp = (struct at91_private *) dev->priv;
686 unsigned long ctl;
687
688 if (!is_valid_ether_addr(dev->dev_addr))
689 return -EADDRNOTAVAIL;
690
691 clk_enable(ether_clk); /* Re-enable Peripheral clock */
692
693 /* Clear internal statistics */
694 ctl = at91_emac_read(AT91_EMAC_CTL);
695 at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_CSR);
696
697 /* Update the MAC address (incase user has changed it) */
698 update_mac_address(dev);
699
700 /* Enable PHY interrupt */
701 enable_phyirq(dev);
702
703 /* Enable MAC interrupts */
704 at91_emac_write(AT91_EMAC_IER, AT91_EMAC_RCOM | AT91_EMAC_RBNA
705 | AT91_EMAC_TUND | AT91_EMAC_RTRY | AT91_EMAC_TCOM
706 | AT91_EMAC_ROVR | AT91_EMAC_ABT);
707
708 /* Determine current link speed */
709 spin_lock_irq(&lp->lock);
710 enable_mdi();
711 update_linkspeed(dev);
712 disable_mdi();
713 spin_unlock_irq(&lp->lock);
714
715 at91ether_start(dev);
716 netif_start_queue(dev);
717 return 0;
718}
719
720/*
721 * Close the interface
722 */
723static int at91ether_close(struct net_device *dev)
724{
725 unsigned long ctl;
726
727 /* Disable Receiver and Transmitter */
728 ctl = at91_emac_read(AT91_EMAC_CTL);
729 at91_emac_write(AT91_EMAC_CTL, ctl & ~(AT91_EMAC_TE | AT91_EMAC_RE));
730
731 /* Disable PHY interrupt */
732 disable_phyirq(dev);
733
734 /* Disable MAC interrupts */
735 at91_emac_write(AT91_EMAC_IDR, AT91_EMAC_RCOM | AT91_EMAC_RBNA
736 | AT91_EMAC_TUND | AT91_EMAC_RTRY | AT91_EMAC_TCOM
737 | AT91_EMAC_ROVR | AT91_EMAC_ABT);
738
739 netif_stop_queue(dev);
740
741 clk_disable(ether_clk); /* Disable Peripheral clock */
742
743 return 0;
744}
745
746/*
747 * Transmit packet.
748 */
749static int at91ether_tx(struct sk_buff *skb, struct net_device *dev)
750{
751 struct at91_private *lp = (struct at91_private *) dev->priv;
752
753 if (at91_emac_read(AT91_EMAC_TSR) & AT91_EMAC_TSR_BNQ) {
754 netif_stop_queue(dev);
755
756 /* Store packet information (to free when Tx completed) */
757 lp->skb = skb;
758 lp->skb_length = skb->len;
759 lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len, DMA_TO_DEVICE);
760 lp->stats.tx_bytes += skb->len;
761
762 /* Set address of the data in the Transmit Address register */
763 at91_emac_write(AT91_EMAC_TAR, lp->skb_physaddr);
764 /* Set length of the packet in the Transmit Control register */
765 at91_emac_write(AT91_EMAC_TCR, skb->len);
766
767 dev->trans_start = jiffies;
768 } else {
769 printk(KERN_ERR "at91_ether.c: at91ether_tx() called, but device is busy!\n");
770 return 1; /* if we return anything but zero, dev.c:1055 calls kfree_skb(skb)
771 on this skb, he also reports -ENETDOWN and printk's, so either
772 we free and return(0) or don't free and return 1 */
773 }
774
775 return 0;
776}
777
778/*
779 * Update the current statistics from the internal statistics registers.
780 */
781static struct net_device_stats *at91ether_stats(struct net_device *dev)
782{
783 struct at91_private *lp = (struct at91_private *) dev->priv;
784 int ale, lenerr, seqe, lcol, ecol;
785
786 if (netif_running(dev)) {
787 lp->stats.rx_packets += at91_emac_read(AT91_EMAC_OK); /* Good frames received */
788 ale = at91_emac_read(AT91_EMAC_ALE);
789 lp->stats.rx_frame_errors += ale; /* Alignment errors */
790 lenerr = at91_emac_read(AT91_EMAC_ELR) + at91_emac_read(AT91_EMAC_USF);
791 lp->stats.rx_length_errors += lenerr; /* Excessive Length or Undersize Frame error */
792 seqe = at91_emac_read(AT91_EMAC_SEQE);
793 lp->stats.rx_crc_errors += seqe; /* CRC error */
794 lp->stats.rx_fifo_errors += at91_emac_read(AT91_EMAC_DRFC); /* Receive buffer not available */
795 lp->stats.rx_errors += (ale + lenerr + seqe
796 + at91_emac_read(AT91_EMAC_CDE) + at91_emac_read(AT91_EMAC_RJB));
797
798 lp->stats.tx_packets += at91_emac_read(AT91_EMAC_FRA); /* Frames successfully transmitted */
799 lp->stats.tx_fifo_errors += at91_emac_read(AT91_EMAC_TUE); /* Transmit FIFO underruns */
800 lp->stats.tx_carrier_errors += at91_emac_read(AT91_EMAC_CSE); /* Carrier Sense errors */
801 lp->stats.tx_heartbeat_errors += at91_emac_read(AT91_EMAC_SQEE);/* Heartbeat error */
802
803 lcol = at91_emac_read(AT91_EMAC_LCOL);
804 ecol = at91_emac_read(AT91_EMAC_ECOL);
805 lp->stats.tx_window_errors += lcol; /* Late collisions */
806 lp->stats.tx_aborted_errors += ecol; /* 16 collisions */
807
808 lp->stats.collisions += (at91_emac_read(AT91_EMAC_SCOL) + at91_emac_read(AT91_EMAC_MCOL) + lcol + ecol);
809 }
810 return &lp->stats;
811}
812
813/*
814 * Extract received frame from buffer descriptors and sent to upper layers.
815 * (Called from interrupt context)
816 */
817static void at91ether_rx(struct net_device *dev)
818{
819 struct at91_private *lp = (struct at91_private *) dev->priv;
820 struct recv_desc_bufs *dlist;
821 unsigned char *p_recv;
822 struct sk_buff *skb;
823 unsigned int pktlen;
824
825 dlist = lp->dlist;
826 while (dlist->descriptors[lp->rxBuffIndex].addr & EMAC_DESC_DONE) {
827 p_recv = dlist->recv_buf[lp->rxBuffIndex];
828 pktlen = dlist->descriptors[lp->rxBuffIndex].size & 0x7ff; /* Length of frame including FCS */
829 skb = alloc_skb(pktlen + 2, GFP_ATOMIC);
830 if (skb != NULL) {
831 skb_reserve(skb, 2);
832 memcpy(skb_put(skb, pktlen), p_recv, pktlen);
833
834 skb->dev = dev;
835 skb->protocol = eth_type_trans(skb, dev);
836 skb->len = pktlen;
837 dev->last_rx = jiffies;
838 lp->stats.rx_bytes += pktlen;
839 netif_rx(skb);
840 }
841 else {
842 lp->stats.rx_dropped += 1;
843 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
844 }
845
846 if (dlist->descriptors[lp->rxBuffIndex].size & EMAC_MULTICAST)
847 lp->stats.multicast++;
848
849 dlist->descriptors[lp->rxBuffIndex].addr &= ~EMAC_DESC_DONE; /* reset ownership bit */
850 if (lp->rxBuffIndex == MAX_RX_DESCR-1) /* wrap after last buffer */
851 lp->rxBuffIndex = 0;
852 else
853 lp->rxBuffIndex++;
854 }
855}
856
857/*
858 * MAC interrupt handler
859 */
860static irqreturn_t at91ether_interrupt(int irq, void *dev_id, struct pt_regs *regs)
861{
862 struct net_device *dev = (struct net_device *) dev_id;
863 struct at91_private *lp = (struct at91_private *) dev->priv;
864 unsigned long intstatus, ctl;
865
866 /* MAC Interrupt Status register indicates what interrupts are pending.
867 It is automatically cleared once read. */
868 intstatus = at91_emac_read(AT91_EMAC_ISR);
869
870 if (intstatus & AT91_EMAC_RCOM) /* Receive complete */
871 at91ether_rx(dev);
872
873 if (intstatus & AT91_EMAC_TCOM) { /* Transmit complete */
874 /* The TCOM bit is set even if the transmission failed. */
875 if (intstatus & (AT91_EMAC_TUND | AT91_EMAC_RTRY))
876 lp->stats.tx_errors += 1;
877
878 if (lp->skb) {
879 dev_kfree_skb_irq(lp->skb);
880 lp->skb = NULL;
881 dma_unmap_single(NULL, lp->skb_physaddr, lp->skb_length, DMA_TO_DEVICE);
882 }
883 netif_wake_queue(dev);
884 }
885
886 /* Work-around for Errata #11 */
887 if (intstatus & AT91_EMAC_RBNA) {
888 ctl = at91_emac_read(AT91_EMAC_CTL);
889 at91_emac_write(AT91_EMAC_CTL, ctl & ~AT91_EMAC_RE);
890 at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_RE);
891 }
892
893 if (intstatus & AT91_EMAC_ROVR)
894 printk("%s: ROVR error\n", dev->name);
895
896 return IRQ_HANDLED;
897}
898
899/*
900 * Initialize the ethernet interface
901 */
902static int __init at91ether_setup(unsigned long phy_type, unsigned short phy_address, struct platform_device *pdev)
903{
904 struct at91_eth_data *board_data = pdev->dev.platform_data;
905 struct net_device *dev;
906 struct at91_private *lp;
907 unsigned int val;
908 int res;
909
910 if (at91_dev) /* already initialized */
911 return 0;
912
913 dev = alloc_etherdev(sizeof(struct at91_private));
914 if (!dev)
915 return -ENOMEM;
916
917 dev->base_addr = AT91_VA_BASE_EMAC;
918 dev->irq = AT91_ID_EMAC;
919 SET_MODULE_OWNER(dev);
920
921 /* Install the interrupt handler */
922 if (request_irq(dev->irq, at91ether_interrupt, 0, dev->name, dev)) {
923 free_netdev(dev);
924 return -EBUSY;
925 }
926
927 /* Allocate memory for DMA Receive descriptors */
928 lp = (struct at91_private *)dev->priv;
929 lp->dlist = (struct recv_desc_bufs *) dma_alloc_coherent(NULL, sizeof(struct recv_desc_bufs), (dma_addr_t *) &lp->dlist_phys, GFP_KERNEL);
930 if (lp->dlist == NULL) {
931 free_irq(dev->irq, dev);
932 free_netdev(dev);
933 return -ENOMEM;
934 }
935 lp->board_data = *board_data;
936 platform_set_drvdata(pdev, dev);
937
938 spin_lock_init(&lp->lock);
939
940 ether_setup(dev);
941 dev->open = at91ether_open;
942 dev->stop = at91ether_close;
943 dev->hard_start_xmit = at91ether_tx;
944 dev->get_stats = at91ether_stats;
945 dev->set_multicast_list = at91ether_set_rx_mode;
946 dev->set_mac_address = set_mac_address;
947 dev->ethtool_ops = &at91ether_ethtool_ops;
948
949 SET_NETDEV_DEV(dev, &pdev->dev);
950
951 get_mac_address(dev); /* Get ethernet address and store it in dev->dev_addr */
952 update_mac_address(dev); /* Program ethernet address into MAC */
953
954 at91_emac_write(AT91_EMAC_CTL, 0);
955
956 if (lp->board_data.is_rmii)
957 at91_emac_write(AT91_EMAC_CFG, AT91_EMAC_CLK_DIV32 | AT91_EMAC_BIG | AT91_EMAC_RMII);
958 else
959 at91_emac_write(AT91_EMAC_CFG, AT91_EMAC_CLK_DIV32 | AT91_EMAC_BIG);
960
961 /* Perform PHY-specific initialization */
962 spin_lock_irq(&lp->lock);
963 enable_mdi();
964 if ((phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) {
965 read_phy(phy_address, MII_DSCR_REG, &val);
966 if ((val & (1 << 10)) == 0) /* DSCR bit 10 is 0 -- fiber mode */
967 lp->phy_media = PORT_FIBRE;
968 } else if (machine_is_csb337()) {
969 /* mix link activity status into LED2 link state */
970 write_phy(phy_address, MII_LEDCTRL_REG, 0x0d22);
971 }
972 disable_mdi();
973 spin_unlock_irq(&lp->lock);
974
975 lp->mii.dev = dev; /* Support for ethtool */
976 lp->mii.mdio_read = mdio_read;
977 lp->mii.mdio_write = mdio_write;
978
979 lp->phy_type = phy_type; /* Type of PHY connected */
980 lp->phy_address = phy_address; /* MDI address of PHY */
981
982 /* Register the network interface */
983 res = register_netdev(dev);
984 if (res) {
985 free_irq(dev->irq, dev);
986 free_netdev(dev);
987 dma_free_coherent(NULL, sizeof(struct recv_desc_bufs), lp->dlist, (dma_addr_t)lp->dlist_phys);
988 return res;
989 }
990 at91_dev = dev;
991
992 /* Determine current link speed */
993 spin_lock_irq(&lp->lock);
994 enable_mdi();
995 update_linkspeed(dev);
996 disable_mdi();
997 spin_unlock_irq(&lp->lock);
998 netif_carrier_off(dev); /* will be enabled in open() */
999
1000 /* Display ethernet banner */
1001 printk(KERN_INFO "%s: AT91 ethernet at 0x%08x int=%d %s%s (%02x:%02x:%02x:%02x:%02x:%02x)\n",
1002 dev->name, (uint) dev->base_addr, dev->irq,
1003 at91_emac_read(AT91_EMAC_CFG) & AT91_EMAC_SPD ? "100-" : "10-",
1004 at91_emac_read(AT91_EMAC_CFG) & AT91_EMAC_FD ? "FullDuplex" : "HalfDuplex",
1005 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
1006 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
1007 if ((phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID))
1008 printk(KERN_INFO "%s: Davicom 9196 PHY %s\n", dev->name, (lp->phy_media == PORT_FIBRE) ? "(Fiber)" : "(Copper)");
1009 else if (phy_type == MII_LXT971A_ID)
1010 printk(KERN_INFO "%s: Intel LXT971A PHY\n", dev->name);
1011 else if (phy_type == MII_RTL8201_ID)
1012 printk(KERN_INFO "%s: Realtek RTL8201(B)L PHY\n", dev->name);
1013 else if (phy_type == MII_BCM5221_ID)
1014 printk(KERN_INFO "%s: Broadcom BCM5221 PHY\n", dev->name);
1015 else if (phy_type == MII_DP83847_ID)
1016 printk(KERN_INFO "%s: National Semiconductor DP83847 PHY\n", dev->name);
1017 else if (phy_type == MII_AC101L_ID)
1018 printk(KERN_INFO "%s: Altima AC101L PHY\n", dev->name);
1019 else if (phy_type == MII_KS8721_ID)
1020 printk(KERN_INFO "%s: Micrel KS8721 PHY\n", dev->name);
1021
1022 return 0;
1023}
1024
1025/*
1026 * Detect MAC and PHY and perform initialization
1027 */
1028static int __init at91ether_probe(struct platform_device *pdev)
1029{
1030 unsigned int phyid1, phyid2;
1031 int detected = -1;
1032 unsigned long phy_id;
1033 unsigned short phy_address = 0;
1034
1035 ether_clk = clk_get(&pdev->dev, "ether_clk");
1036 if (!ether_clk) {
1037 printk(KERN_ERR "at91_ether: no clock defined\n");
1038 return -ENODEV;
1039 }
1040 clk_enable(ether_clk); /* Enable Peripheral clock */
1041
1042 while ((detected != 0) && (phy_address < 32)) {
1043 /* Read the PHY ID registers */
1044 enable_mdi();
1045 read_phy(phy_address, MII_PHYSID1, &phyid1);
1046 read_phy(phy_address, MII_PHYSID2, &phyid2);
1047 disable_mdi();
1048
1049 phy_id = (phyid1 << 16) | (phyid2 & 0xfff0);
1050 switch (phy_id) {
1051 case MII_DM9161_ID: /* Davicom 9161: PHY_ID1 = 0x181, PHY_ID2 = B881 */
1052 case MII_DM9161A_ID: /* Davicom 9161A: PHY_ID1 = 0x181, PHY_ID2 = B8A0 */
1053 case MII_LXT971A_ID: /* Intel LXT971A: PHY_ID1 = 0x13, PHY_ID2 = 78E0 */
1054 case MII_RTL8201_ID: /* Realtek RTL8201: PHY_ID1 = 0, PHY_ID2 = 0x8201 */
1055 case MII_BCM5221_ID: /* Broadcom BCM5221: PHY_ID1 = 0x40, PHY_ID2 = 0x61e0 */
1056 case MII_DP83847_ID: /* National Semiconductor DP83847: */
1057 case MII_AC101L_ID: /* Altima AC101L: PHY_ID1 = 0x22, PHY_ID2 = 0x5520 */
1058 case MII_KS8721_ID: /* Micrel KS8721: PHY_ID1 = 0x22, PHY_ID2 = 0x1610 */
1059 detected = at91ether_setup(phy_id, phy_address, pdev);
1060 break;
1061 }
1062
1063 phy_address++;
1064 }
1065
1066 clk_disable(ether_clk); /* Disable Peripheral clock */
1067
1068 return detected;
1069}
1070
1071static int __devexit at91ether_remove(struct platform_device *pdev)
1072{
1073 struct at91_private *lp = (struct at91_private *) at91_dev->priv;
1074
1075 unregister_netdev(at91_dev);
1076 free_irq(at91_dev->irq, at91_dev);
1077 dma_free_coherent(NULL, sizeof(struct recv_desc_bufs), lp->dlist, (dma_addr_t)lp->dlist_phys);
1078 clk_put(ether_clk);
1079
1080 free_netdev(at91_dev);
1081 at91_dev = NULL;
1082 return 0;
1083}
1084
1085static struct platform_driver at91ether_driver = {
1086 .probe = at91ether_probe,
1087 .remove = __devexit_p(at91ether_remove),
1088 /* FIXME: support suspend and resume */
1089 .driver = {
1090 .name = DRV_NAME,
1091 .owner = THIS_MODULE,
1092 },
1093};
1094
1095static int __init at91ether_init(void)
1096{
1097 return platform_driver_register(&at91ether_driver);
1098}
1099
1100static void __exit at91ether_exit(void)
1101{
1102 platform_driver_unregister(&at91ether_driver);
1103}
1104
1105module_init(at91ether_init)
1106module_exit(at91ether_exit)
1107
1108MODULE_LICENSE("GPL");
1109MODULE_DESCRIPTION("AT91RM9200 EMAC Ethernet driver");
1110MODULE_AUTHOR("Andrew Victor");
diff --git a/drivers/net/arm/at91_ether.h b/drivers/net/arm/at91_ether.h
new file mode 100644
index 000000000000..9885735c9c8a
--- /dev/null
+++ b/drivers/net/arm/at91_ether.h
@@ -0,0 +1,101 @@
1/*
2 * Ethernet driver for the Atmel AT91RM9200 (Thunder)
3 *
4 * Copyright (C) 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.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15#ifndef AT91_ETHERNET
16#define AT91_ETHERNET
17
18
19/* Davicom 9161 PHY */
20#define MII_DM9161_ID 0x0181b880
21#define MII_DM9161A_ID 0x0181b8a0
22
23/* Davicom specific registers */
24#define MII_DSCR_REG 16
25#define MII_DSCSR_REG 17
26#define MII_DSINTR_REG 21
27
28/* Intel LXT971A PHY */
29#define MII_LXT971A_ID 0x001378E0
30
31/* Intel specific registers */
32#define MII_ISINTE_REG 18
33#define MII_ISINTS_REG 19
34#define MII_LEDCTRL_REG 20
35
36/* Realtek RTL8201 PHY */
37#define MII_RTL8201_ID 0x00008200
38
39/* Broadcom BCM5221 PHY */
40#define MII_BCM5221_ID 0x004061e0
41
42/* Broadcom specific registers */
43#define MII_BCMINTR_REG 26
44
45/* National Semiconductor DP83847 */
46#define MII_DP83847_ID 0x20005c30
47
48/* Altima AC101L PHY */
49#define MII_AC101L_ID 0x00225520
50
51/* Micrel KS8721 PHY */
52#define MII_KS8721_ID 0x00221610
53
54/* ........................................................................ */
55
56#define MAX_RBUFF_SZ 0x600 /* 1518 rounded up */
57#define MAX_RX_DESCR 9 /* max number of receive buffers */
58
59#define EMAC_DESC_DONE 0x00000001 /* bit for if DMA is done */
60#define EMAC_DESC_WRAP 0x00000002 /* bit for wrap */
61
62#define EMAC_BROADCAST 0x80000000 /* broadcast address */
63#define EMAC_MULTICAST 0x40000000 /* multicast address */
64#define EMAC_UNICAST 0x20000000 /* unicast address */
65
66struct rbf_t
67{
68 unsigned int addr;
69 unsigned long size;
70};
71
72struct recv_desc_bufs
73{
74 struct rbf_t descriptors[MAX_RX_DESCR]; /* must be on sizeof (rbf_t) boundary */
75 char recv_buf[MAX_RX_DESCR][MAX_RBUFF_SZ]; /* must be on long boundary */
76};
77
78struct at91_private
79{
80 struct net_device_stats stats;
81 struct mii_if_info mii; /* ethtool support */
82 struct at91_eth_data board_data; /* board-specific configuration */
83
84 /* PHY */
85 unsigned long phy_type; /* type of PHY (PHY_ID) */
86 spinlock_t lock; /* lock for MDI interface */
87 short phy_media; /* media interface type */
88 unsigned short phy_address; /* 5-bit MDI address of PHY (0..31) */
89
90 /* Transmit */
91 struct sk_buff *skb; /* holds skb until xmit interrupt completes */
92 dma_addr_t skb_physaddr; /* phys addr from pci_map_single */
93 int skb_length; /* saved skb length for pci_unmap_single */
94
95 /* Receive */
96 int rxBuffIndex; /* index into receive descriptor list */
97 struct recv_desc_bufs *dlist; /* descriptor list address */
98 struct recv_desc_bufs *dlist_phys; /* descriptor list physical address */
99};
100
101#endif
diff --git a/include/asm-arm/arch-at91rm9200/at91rm9200_emac.h b/include/asm-arm/arch-at91rm9200/at91rm9200_emac.h
new file mode 100644
index 000000000000..fbc091e61e2f
--- /dev/null
+++ b/include/asm-arm/arch-at91rm9200/at91rm9200_emac.h
@@ -0,0 +1,138 @@
1/*
2 * include/asm-arm/arch-at91rm9200/at91rm9200_emac.h
3 *
4 * Copyright (C) 2005 Ivan Kokshaysky
5 * Copyright (C) SAN People
6 *
7 * Ethernet MAC registers.
8 * Based on AT91RM9200 datasheet revision E.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 */
15
16#ifndef AT91RM9200_EMAC_H
17#define AT91RM9200_EMAC_H
18
19#define AT91_EMAC_CTL 0x00 /* Control Register */
20#define AT91_EMAC_LB (1 << 0) /* Loopback */
21#define AT91_EMAC_LBL (1 << 1) /* Loopback Local */
22#define AT91_EMAC_RE (1 << 2) /* Receive Enable */
23#define AT91_EMAC_TE (1 << 3) /* Transmit Enable */
24#define AT91_EMAC_MPE (1 << 4) /* Management Port Enable */
25#define AT91_EMAC_CSR (1 << 5) /* Clear Statistics Registers */
26#define AT91_EMAC_INCSTAT (1 << 6) /* Increment Statistics Registers */
27#define AT91_EMAC_WES (1 << 7) /* Write Enable for Statistics Registers */
28#define AT91_EMAC_BP (1 << 8) /* Back Pressure */
29
30#define AT91_EMAC_CFG 0x04 /* Configuration Register */
31#define AT91_EMAC_SPD (1 << 0) /* Speed */
32#define AT91_EMAC_FD (1 << 1) /* Full Duplex */
33#define AT91_EMAC_BR (1 << 2) /* Bit Rate */
34#define AT91_EMAC_CAF (1 << 4) /* Copy All Frames */
35#define AT91_EMAC_NBC (1 << 5) /* No Broadcast */
36#define AT91_EMAC_MTI (1 << 6) /* Multicast Hash Enable */
37#define AT91_EMAC_UNI (1 << 7) /* Unicast Hash Enable */
38#define AT91_EMAC_BIG (1 << 8) /* Receive 1522 Bytes */
39#define AT91_EMAC_EAE (1 << 9) /* External Address Match Enable */
40#define AT91_EMAC_CLK (3 << 10) /* MDC Clock Divisor */
41#define AT91_EMAC_CLK_DIV8 (0 << 10)
42#define AT91_EMAC_CLK_DIV16 (1 << 10)
43#define AT91_EMAC_CLK_DIV32 (2 << 10)
44#define AT91_EMAC_CLK_DIV64 (3 << 10)
45#define AT91_EMAC_RTY (1 << 12) /* Retry Test */
46#define AT91_EMAC_RMII (1 << 13) /* Reduce MII (RMII) */
47
48#define AT91_EMAC_SR 0x08 /* Status Register */
49#define AT91_EMAC_SR_LINK (1 << 0) /* Link */
50#define AT91_EMAC_SR_MDIO (1 << 1) /* MDIO pin */
51#define AT91_EMAC_SR_IDLE (1 << 2) /* PHY idle */
52
53#define AT91_EMAC_TAR 0x0c /* Transmit Address Register */
54
55#define AT91_EMAC_TCR 0x10 /* Transmit Control Register */
56#define AT91_EMAC_LEN (0x7ff << 0) /* Transmit Frame Length */
57#define AT91_EMAC_NCRC (1 << 15) /* No CRC */
58
59#define AT91_EMAC_TSR 0x14 /* Transmit Status Register */
60#define AT91_EMAC_TSR_OVR (1 << 0) /* Transmit Buffer Overrun */
61#define AT91_EMAC_TSR_COL (1 << 1) /* Collision Occurred */
62#define AT91_EMAC_TSR_RLE (1 << 2) /* Retry Limit Exceeded */
63#define AT91_EMAC_TSR_IDLE (1 << 3) /* Transmitter Idle */
64#define AT91_EMAC_TSR_BNQ (1 << 4) /* Transmit Buffer not Queued */
65#define AT91_EMAC_TSR_COMP (1 << 5) /* Transmit Complete */
66#define AT91_EMAC_TSR_UND (1 << 6) /* Transmit Underrun */
67
68#define AT91_EMAC_RBQP 0x18 /* Receive Buffer Queue Pointer */
69
70#define AT91_EMAC_RSR 0x20 /* Receive Status Register */
71#define AT91_EMAC_RSR_BNA (1 << 0) /* Buffer Not Available */
72#define AT91_EMAC_RSR_REC (1 << 1) /* Frame Received */
73#define AT91_EMAC_RSR_OVR (1 << 2) /* RX Overrun */
74
75#define AT91_EMAC_ISR 0x24 /* Interrupt Status Register */
76#define AT91_EMAC_DONE (1 << 0) /* Management Done */
77#define AT91_EMAC_RCOM (1 << 1) /* Receive Complete */
78#define AT91_EMAC_RBNA (1 << 2) /* Receive Buffer Not Available */
79#define AT91_EMAC_TOVR (1 << 3) /* Transmit Buffer Overrun */
80#define AT91_EMAC_TUND (1 << 4) /* Transmit Buffer Underrun */
81#define AT91_EMAC_RTRY (1 << 5) /* Retry Limit */
82#define AT91_EMAC_TBRE (1 << 6) /* Transmit Buffer Register Empty */
83#define AT91_EMAC_TCOM (1 << 7) /* Transmit Complete */
84#define AT91_EMAC_TIDLE (1 << 8) /* Transmit Idle */
85#define AT91_EMAC_LINK (1 << 9) /* Link */
86#define AT91_EMAC_ROVR (1 << 10) /* RX Overrun */
87#define AT91_EMAC_ABT (1 << 11) /* Abort */
88
89#define AT91_EMAC_IER 0x28 /* Interrupt Enable Register */
90#define AT91_EMAC_IDR 0x2c /* Interrupt Disable Register */
91#define AT91_EMAC_IMR 0x30 /* Interrupt Mask Register */
92
93#define AT91_EMAC_MAN 0x34 /* PHY Maintenance Register */
94#define AT91_EMAC_DATA (0xffff << 0) /* MDIO Data */
95#define AT91_EMAC_REGA (0x1f << 18) /* MDIO Register */
96#define AT91_EMAC_PHYA (0x1f << 23) /* MDIO PHY Address */
97#define AT91_EMAC_RW (3 << 28) /* Read/Write operation */
98#define AT91_EMAC_RW_W (1 << 28)
99#define AT91_EMAC_RW_R (2 << 28)
100#define AT91_EMAC_MAN_802_3 0x40020000 /* IEEE 802.3 value */
101
102/*
103 * Statistics Registers.
104 */
105#define AT91_EMAC_FRA 0x40 /* Frames Transmitted OK */
106#define AT91_EMAC_SCOL 0x44 /* Single Collision Frame */
107#define AT91_EMAC_MCOL 0x48 /* Multiple Collision Frame */
108#define AT91_EMAC_OK 0x4c /* Frames Received OK */
109#define AT91_EMAC_SEQE 0x50 /* Frame Check Sequence Error */
110#define AT91_EMAC_ALE 0x54 /* Alignmemt Error */
111#define AT91_EMAC_DTE 0x58 /* Deffered Transmission Frame */
112#define AT91_EMAC_LCOL 0x5c /* Late Collision */
113#define AT91_EMAC_ECOL 0x60 /* Excessive Collision */
114#define AT91_EMAC_TUE 0x64 /* Transmit Underrun Error */
115#define AT91_EMAC_CSE 0x68 /* Carrier Sense Error */
116#define AT91_EMAC_DRFC 0x6c /* Discard RX Frame */
117#define AT91_EMAC_ROV 0x70 /* Receive Overrun */
118#define AT91_EMAC_CDE 0x74 /* Code Error */
119#define AT91_EMAC_ELR 0x78 /* Excessive Length Error */
120#define AT91_EMAC_RJB 0x7c /* Receive Jabber */
121#define AT91_EMAC_USF 0x80 /* Undersize Frame */
122#define AT91_EMAC_SQEE 0x84 /* SQE Test Error */
123
124/*
125 * Address Registers.
126 */
127#define AT91_EMAC_HSL 0x90 /* Hash Address Low [31:0] */
128#define AT91_EMAC_HSH 0x94 /* Hash Address High [63:32] */
129#define AT91_EMAC_SA1L 0x98 /* Specific Address 1 Low, bytes 0-3 */
130#define AT91_EMAC_SA1H 0x9c /* Specific Address 1 High, bytes 4-5 */
131#define AT91_EMAC_SA2L 0xa0 /* Specific Address 2 Low, bytes 0-3 */
132#define AT91_EMAC_SA2H 0xa4 /* Specific Address 2 High, bytes 4-5 */
133#define AT91_EMAC_SA3L 0xa8 /* Specific Address 3 Low, bytes 0-3 */
134#define AT91_EMAC_SA3H 0xac /* Specific Address 3 High, bytes 4-5 */
135#define AT91_EMAC_SA4L 0xb0 /* Specific Address 4 Low, bytes 0-3 */
136#define AT91_EMAC_SA4H 0xb4 /* Specific Address 4 High, bytes 4-5 */
137
138#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 11:29:39 -0500