]>
Commit | Line | Data |
---|---|---|
d4b7780e AV |
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 | ||
45 | static struct net_device *at91_dev; | |
d4b7780e | 46 | |
775637df AV |
47 | static struct timer_list check_timer; |
48 | #define LINK_POLL_INTERVAL (HZ) | |
49 | ||
d4b7780e AV |
50 | /* ..................................................................... */ |
51 | ||
52 | /* | |
53 | * Read from a EMAC register. | |
54 | */ | |
55 | static inline unsigned long at91_emac_read(unsigned int reg) | |
56 | { | |
57 | void __iomem *emac_base = (void __iomem *)AT91_VA_BASE_EMAC; | |
58 | ||
59 | return __raw_readl(emac_base + reg); | |
60 | } | |
61 | ||
62 | /* | |
63 | * Write to a EMAC register. | |
64 | */ | |
65 | static inline void at91_emac_write(unsigned int reg, unsigned long value) | |
66 | { | |
67 | void __iomem *emac_base = (void __iomem *)AT91_VA_BASE_EMAC; | |
68 | ||
69 | __raw_writel(value, emac_base + reg); | |
70 | } | |
71 | ||
72 | /* ........................... PHY INTERFACE ........................... */ | |
73 | ||
74 | /* | |
75 | * Enable the MDIO bit in MAC control register | |
76 | * When not called from an interrupt-handler, access to the PHY must be | |
77 | * protected by a spinlock. | |
78 | */ | |
79 | static void enable_mdi(void) | |
80 | { | |
81 | unsigned long ctl; | |
82 | ||
83 | ctl = at91_emac_read(AT91_EMAC_CTL); | |
84 | at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_MPE); /* enable management port */ | |
85 | } | |
86 | ||
87 | /* | |
88 | * Disable the MDIO bit in the MAC control register | |
89 | */ | |
90 | static void disable_mdi(void) | |
91 | { | |
92 | unsigned long ctl; | |
93 | ||
94 | ctl = at91_emac_read(AT91_EMAC_CTL); | |
95 | at91_emac_write(AT91_EMAC_CTL, ctl & ~AT91_EMAC_MPE); /* disable management port */ | |
96 | } | |
97 | ||
98 | /* | |
99 | * Wait until the PHY operation is complete. | |
100 | */ | |
101 | static inline void at91_phy_wait(void) { | |
102 | unsigned long timeout = jiffies + 2; | |
103 | ||
104 | while (!(at91_emac_read(AT91_EMAC_SR) & AT91_EMAC_SR_IDLE)) { | |
105 | if (time_after(jiffies, timeout)) { | |
106 | printk("at91_ether: MIO timeout\n"); | |
107 | break; | |
108 | } | |
109 | cpu_relax(); | |
110 | } | |
111 | } | |
112 | ||
113 | /* | |
114 | * Write value to the a PHY register | |
115 | * Note: MDI interface is assumed to already have been enabled. | |
116 | */ | |
117 | static void write_phy(unsigned char phy_addr, unsigned char address, unsigned int value) | |
118 | { | |
119 | at91_emac_write(AT91_EMAC_MAN, AT91_EMAC_MAN_802_3 | AT91_EMAC_RW_W | |
120 | | ((phy_addr & 0x1f) << 23) | (address << 18) | (value & AT91_EMAC_DATA)); | |
121 | ||
122 | /* Wait until IDLE bit in Network Status register is cleared */ | |
123 | at91_phy_wait(); | |
124 | } | |
125 | ||
126 | /* | |
127 | * Read value stored in a PHY register. | |
128 | * Note: MDI interface is assumed to already have been enabled. | |
129 | */ | |
130 | static void read_phy(unsigned char phy_addr, unsigned char address, unsigned int *value) | |
131 | { | |
132 | at91_emac_write(AT91_EMAC_MAN, AT91_EMAC_MAN_802_3 | AT91_EMAC_RW_R | |
133 | | ((phy_addr & 0x1f) << 23) | (address << 18)); | |
134 | ||
135 | /* Wait until IDLE bit in Network Status register is cleared */ | |
136 | at91_phy_wait(); | |
137 | ||
138 | *value = at91_emac_read(AT91_EMAC_MAN) & AT91_EMAC_DATA; | |
139 | } | |
140 | ||
141 | /* ........................... PHY MANAGEMENT .......................... */ | |
142 | ||
143 | /* | |
144 | * Access the PHY to determine the current link speed and mode, and update the | |
145 | * MAC accordingly. | |
146 | * If no link or auto-negotiation is busy, then no changes are made. | |
147 | */ | |
775637df | 148 | static void update_linkspeed(struct net_device *dev, int silent) |
d4b7780e AV |
149 | { |
150 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
151 | unsigned int bmsr, bmcr, lpa, mac_cfg; | |
152 | unsigned int speed, duplex; | |
153 | ||
154 | if (!mii_link_ok(&lp->mii)) { /* no link */ | |
155 | netif_carrier_off(dev); | |
775637df AV |
156 | if (!silent) |
157 | printk(KERN_INFO "%s: Link down.\n", dev->name); | |
d4b7780e AV |
158 | return; |
159 | } | |
160 | ||
161 | /* Link up, or auto-negotiation still in progress */ | |
162 | read_phy(lp->phy_address, MII_BMSR, &bmsr); | |
163 | read_phy(lp->phy_address, MII_BMCR, &bmcr); | |
164 | if (bmcr & BMCR_ANENABLE) { /* AutoNegotiation is enabled */ | |
165 | if (!(bmsr & BMSR_ANEGCOMPLETE)) | |
166 | return; /* Do nothing - another interrupt generated when negotiation complete */ | |
167 | ||
168 | read_phy(lp->phy_address, MII_LPA, &lpa); | |
169 | if ((lpa & LPA_100FULL) || (lpa & LPA_100HALF)) speed = SPEED_100; | |
170 | else speed = SPEED_10; | |
171 | if ((lpa & LPA_100FULL) || (lpa & LPA_10FULL)) duplex = DUPLEX_FULL; | |
172 | else duplex = DUPLEX_HALF; | |
173 | } else { | |
174 | speed = (bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10; | |
175 | duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF; | |
176 | } | |
177 | ||
178 | /* Update the MAC */ | |
179 | mac_cfg = at91_emac_read(AT91_EMAC_CFG) & ~(AT91_EMAC_SPD | AT91_EMAC_FD); | |
180 | if (speed == SPEED_100) { | |
181 | if (duplex == DUPLEX_FULL) /* 100 Full Duplex */ | |
182 | mac_cfg |= AT91_EMAC_SPD | AT91_EMAC_FD; | |
183 | else /* 100 Half Duplex */ | |
184 | mac_cfg |= AT91_EMAC_SPD; | |
185 | } else { | |
186 | if (duplex == DUPLEX_FULL) /* 10 Full Duplex */ | |
187 | mac_cfg |= AT91_EMAC_FD; | |
188 | else {} /* 10 Half Duplex */ | |
189 | } | |
190 | at91_emac_write(AT91_EMAC_CFG, mac_cfg); | |
191 | ||
775637df AV |
192 | if (!silent) |
193 | printk(KERN_INFO "%s: Link now %i-%s\n", dev->name, speed, (duplex == DUPLEX_FULL) ? "FullDuplex" : "HalfDuplex"); | |
d4b7780e AV |
194 | netif_carrier_on(dev); |
195 | } | |
196 | ||
197 | /* | |
198 | * Handle interrupts from the PHY | |
199 | */ | |
200 | static irqreturn_t at91ether_phy_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
201 | { | |
202 | struct net_device *dev = (struct net_device *) dev_id; | |
203 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
204 | unsigned int phy; | |
205 | ||
206 | /* | |
207 | * This hander is triggered on both edges, but the PHY chips expect | |
208 | * level-triggering. We therefore have to check if the PHY actually has | |
209 | * an IRQ pending. | |
210 | */ | |
211 | enable_mdi(); | |
212 | if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) { | |
213 | read_phy(lp->phy_address, MII_DSINTR_REG, &phy); /* ack interrupt in Davicom PHY */ | |
214 | if (!(phy & (1 << 0))) | |
215 | goto done; | |
216 | } | |
217 | else if (lp->phy_type == MII_LXT971A_ID) { | |
218 | read_phy(lp->phy_address, MII_ISINTS_REG, &phy); /* ack interrupt in Intel PHY */ | |
219 | if (!(phy & (1 << 2))) | |
220 | goto done; | |
221 | } | |
222 | else if (lp->phy_type == MII_BCM5221_ID) { | |
223 | read_phy(lp->phy_address, MII_BCMINTR_REG, &phy); /* ack interrupt in Broadcom PHY */ | |
224 | if (!(phy & (1 << 0))) | |
225 | goto done; | |
226 | } | |
227 | else if (lp->phy_type == MII_KS8721_ID) { | |
228 | read_phy(lp->phy_address, MII_TPISTATUS, &phy); /* ack interrupt in Micrel PHY */ | |
229 | if (!(phy & ((1 << 2) | 1))) | |
230 | goto done; | |
231 | } | |
232 | ||
775637df | 233 | update_linkspeed(dev, 0); |
d4b7780e AV |
234 | |
235 | done: | |
236 | disable_mdi(); | |
237 | ||
238 | return IRQ_HANDLED; | |
239 | } | |
240 | ||
241 | /* | |
242 | * Initialize and enable the PHY interrupt for link-state changes | |
243 | */ | |
244 | static void enable_phyirq(struct net_device *dev) | |
245 | { | |
246 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
247 | unsigned int dsintr, irq_number; | |
248 | int status; | |
249 | ||
775637df AV |
250 | irq_number = lp->board_data.phy_irq_pin; |
251 | if (!irq_number) { | |
252 | /* | |
253 | * PHY doesn't have an IRQ pin (RTL8201, DP83847, AC101L), | |
254 | * or board does not have it connected. | |
255 | */ | |
256 | check_timer.expires = jiffies + LINK_POLL_INTERVAL; | |
257 | add_timer(&check_timer); | |
d4b7780e | 258 | return; |
775637df | 259 | } |
d4b7780e | 260 | |
d4b7780e AV |
261 | status = request_irq(irq_number, at91ether_phy_interrupt, 0, dev->name, dev); |
262 | if (status) { | |
263 | printk(KERN_ERR "at91_ether: PHY IRQ %d request failed - status %d!\n", irq_number, status); | |
264 | return; | |
265 | } | |
266 | ||
267 | spin_lock_irq(&lp->lock); | |
268 | enable_mdi(); | |
269 | ||
270 | if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) { /* for Davicom PHY */ | |
271 | read_phy(lp->phy_address, MII_DSINTR_REG, &dsintr); | |
272 | dsintr = dsintr & ~0xf00; /* clear bits 8..11 */ | |
273 | write_phy(lp->phy_address, MII_DSINTR_REG, dsintr); | |
274 | } | |
275 | else if (lp->phy_type == MII_LXT971A_ID) { /* for Intel PHY */ | |
276 | read_phy(lp->phy_address, MII_ISINTE_REG, &dsintr); | |
277 | dsintr = dsintr | 0xf2; /* set bits 1, 4..7 */ | |
278 | write_phy(lp->phy_address, MII_ISINTE_REG, dsintr); | |
279 | } | |
280 | else if (lp->phy_type == MII_BCM5221_ID) { /* for Broadcom PHY */ | |
281 | dsintr = (1 << 15) | ( 1 << 14); | |
282 | write_phy(lp->phy_address, MII_BCMINTR_REG, dsintr); | |
283 | } | |
284 | else if (lp->phy_type == MII_KS8721_ID) { /* for Micrel PHY */ | |
285 | dsintr = (1 << 10) | ( 1 << 8); | |
286 | write_phy(lp->phy_address, MII_TPISTATUS, dsintr); | |
287 | } | |
288 | ||
289 | disable_mdi(); | |
290 | spin_unlock_irq(&lp->lock); | |
291 | } | |
292 | ||
293 | /* | |
294 | * Disable the PHY interrupt | |
295 | */ | |
296 | static void disable_phyirq(struct net_device *dev) | |
297 | { | |
298 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
299 | unsigned int dsintr; | |
300 | unsigned int irq_number; | |
301 | ||
775637df AV |
302 | irq_number = lp->board_data.phy_irq_pin; |
303 | if (!irq_number) { | |
304 | del_timer_sync(&check_timer); | |
d4b7780e | 305 | return; |
775637df | 306 | } |
d4b7780e AV |
307 | |
308 | spin_lock_irq(&lp->lock); | |
309 | enable_mdi(); | |
310 | ||
311 | if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) { /* for Davicom PHY */ | |
312 | read_phy(lp->phy_address, MII_DSINTR_REG, &dsintr); | |
313 | dsintr = dsintr | 0xf00; /* set bits 8..11 */ | |
314 | write_phy(lp->phy_address, MII_DSINTR_REG, dsintr); | |
315 | } | |
316 | else if (lp->phy_type == MII_LXT971A_ID) { /* for Intel PHY */ | |
317 | read_phy(lp->phy_address, MII_ISINTE_REG, &dsintr); | |
318 | dsintr = dsintr & ~0xf2; /* clear bits 1, 4..7 */ | |
319 | write_phy(lp->phy_address, MII_ISINTE_REG, dsintr); | |
320 | } | |
321 | else if (lp->phy_type == MII_BCM5221_ID) { /* for Broadcom PHY */ | |
322 | read_phy(lp->phy_address, MII_BCMINTR_REG, &dsintr); | |
323 | dsintr = ~(1 << 14); | |
324 | write_phy(lp->phy_address, MII_BCMINTR_REG, dsintr); | |
325 | } | |
326 | else if (lp->phy_type == MII_KS8721_ID) { /* for Micrel PHY */ | |
327 | read_phy(lp->phy_address, MII_TPISTATUS, &dsintr); | |
328 | dsintr = ~((1 << 10) | (1 << 8)); | |
329 | write_phy(lp->phy_address, MII_TPISTATUS, dsintr); | |
330 | } | |
331 | ||
332 | disable_mdi(); | |
333 | spin_unlock_irq(&lp->lock); | |
334 | ||
d4b7780e AV |
335 | free_irq(irq_number, dev); /* Free interrupt handler */ |
336 | } | |
337 | ||
338 | /* | |
339 | * Perform a software reset of the PHY. | |
340 | */ | |
341 | #if 0 | |
342 | static void reset_phy(struct net_device *dev) | |
343 | { | |
344 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
345 | unsigned int bmcr; | |
346 | ||
347 | spin_lock_irq(&lp->lock); | |
348 | enable_mdi(); | |
349 | ||
350 | /* Perform PHY reset */ | |
351 | write_phy(lp->phy_address, MII_BMCR, BMCR_RESET); | |
352 | ||
353 | /* Wait until PHY reset is complete */ | |
354 | do { | |
355 | read_phy(lp->phy_address, MII_BMCR, &bmcr); | |
356 | } while (!(bmcr && BMCR_RESET)); | |
357 | ||
358 | disable_mdi(); | |
359 | spin_unlock_irq(&lp->lock); | |
360 | } | |
361 | #endif | |
362 | ||
775637df AV |
363 | static void at91ether_check_link(unsigned long dev_id) |
364 | { | |
365 | struct net_device *dev = (struct net_device *) dev_id; | |
366 | ||
367 | enable_mdi(); | |
368 | update_linkspeed(dev, 1); | |
369 | disable_mdi(); | |
370 | ||
371 | check_timer.expires = jiffies + LINK_POLL_INTERVAL; | |
372 | add_timer(&check_timer); | |
373 | } | |
374 | ||
d4b7780e AV |
375 | /* ......................... ADDRESS MANAGEMENT ........................ */ |
376 | ||
377 | /* | |
378 | * NOTE: Your bootloader must always set the MAC address correctly before | |
379 | * booting into Linux. | |
380 | * | |
381 | * - It must always set the MAC address after reset, even if it doesn't | |
382 | * happen to access the Ethernet while it's booting. Some versions of | |
383 | * U-Boot on the AT91RM9200-DK do not do this. | |
384 | * | |
385 | * - Likewise it must store the addresses in the correct byte order. | |
386 | * MicroMonitor (uMon) on the CSB337 does this incorrectly (and | |
387 | * continues to do so, for bug-compatibility). | |
388 | */ | |
389 | ||
390 | static short __init unpack_mac_address(struct net_device *dev, unsigned int hi, unsigned int lo) | |
391 | { | |
392 | char addr[6]; | |
393 | ||
394 | if (machine_is_csb337()) { | |
395 | addr[5] = (lo & 0xff); /* The CSB337 bootloader stores the MAC the wrong-way around */ | |
396 | addr[4] = (lo & 0xff00) >> 8; | |
397 | addr[3] = (lo & 0xff0000) >> 16; | |
398 | addr[2] = (lo & 0xff000000) >> 24; | |
399 | addr[1] = (hi & 0xff); | |
400 | addr[0] = (hi & 0xff00) >> 8; | |
401 | } | |
402 | else { | |
403 | addr[0] = (lo & 0xff); | |
404 | addr[1] = (lo & 0xff00) >> 8; | |
405 | addr[2] = (lo & 0xff0000) >> 16; | |
406 | addr[3] = (lo & 0xff000000) >> 24; | |
407 | addr[4] = (hi & 0xff); | |
408 | addr[5] = (hi & 0xff00) >> 8; | |
409 | } | |
410 | ||
411 | if (is_valid_ether_addr(addr)) { | |
412 | memcpy(dev->dev_addr, &addr, 6); | |
413 | return 1; | |
414 | } | |
415 | return 0; | |
416 | } | |
417 | ||
418 | /* | |
419 | * Set the ethernet MAC address in dev->dev_addr | |
420 | */ | |
421 | static void __init get_mac_address(struct net_device *dev) | |
422 | { | |
423 | /* Check Specific-Address 1 */ | |
424 | if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA1H), at91_emac_read(AT91_EMAC_SA1L))) | |
425 | return; | |
426 | /* Check Specific-Address 2 */ | |
427 | if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA2H), at91_emac_read(AT91_EMAC_SA2L))) | |
428 | return; | |
429 | /* Check Specific-Address 3 */ | |
430 | if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA3H), at91_emac_read(AT91_EMAC_SA3L))) | |
431 | return; | |
432 | /* Check Specific-Address 4 */ | |
433 | if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA4H), at91_emac_read(AT91_EMAC_SA4L))) | |
434 | return; | |
435 | ||
436 | printk(KERN_ERR "at91_ether: Your bootloader did not configure a MAC address.\n"); | |
437 | } | |
438 | ||
439 | /* | |
440 | * Program the hardware MAC address from dev->dev_addr. | |
441 | */ | |
442 | static void update_mac_address(struct net_device *dev) | |
443 | { | |
444 | 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])); | |
445 | at91_emac_write(AT91_EMAC_SA1H, (dev->dev_addr[5] << 8) | (dev->dev_addr[4])); | |
446 | ||
447 | at91_emac_write(AT91_EMAC_SA2L, 0); | |
448 | at91_emac_write(AT91_EMAC_SA2H, 0); | |
449 | } | |
450 | ||
451 | /* | |
452 | * Store the new hardware address in dev->dev_addr, and update the MAC. | |
453 | */ | |
454 | static int set_mac_address(struct net_device *dev, void* addr) | |
455 | { | |
456 | struct sockaddr *address = addr; | |
457 | ||
458 | if (!is_valid_ether_addr(address->sa_data)) | |
459 | return -EADDRNOTAVAIL; | |
460 | ||
461 | memcpy(dev->dev_addr, address->sa_data, dev->addr_len); | |
462 | update_mac_address(dev); | |
463 | ||
464 | printk("%s: Setting MAC address to %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, | |
465 | dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], | |
466 | dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | static int inline hash_bit_value(int bitnr, __u8 *addr) | |
472 | { | |
473 | if (addr[bitnr / 8] & (1 << (bitnr % 8))) | |
474 | return 1; | |
475 | return 0; | |
476 | } | |
477 | ||
478 | /* | |
479 | * The hash address register is 64 bits long and takes up two locations in the memory map. | |
480 | * The least significant bits are stored in EMAC_HSL and the most significant | |
481 | * bits in EMAC_HSH. | |
482 | * | |
483 | * The unicast hash enable and the multicast hash enable bits in the network configuration | |
484 | * register enable the reception of hash matched frames. The destination address is | |
485 | * reduced to a 6 bit index into the 64 bit hash register using the following hash function. | |
486 | * The hash function is an exclusive or of every sixth bit of the destination address. | |
487 | * hash_index[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47] | |
488 | * hash_index[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46] | |
489 | * hash_index[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45] | |
490 | * hash_index[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44] | |
491 | * hash_index[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43] | |
492 | * hash_index[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42] | |
493 | * da[0] represents the least significant bit of the first byte received, that is, the multicast/ | |
494 | * unicast indicator, and da[47] represents the most significant bit of the last byte | |
495 | * received. | |
496 | * If the hash index points to a bit that is set in the hash register then the frame will be | |
497 | * matched according to whether the frame is multicast or unicast. | |
498 | * A multicast match will be signalled if the multicast hash enable bit is set, da[0] is 1 and | |
499 | * the hash index points to a bit set in the hash register. | |
500 | * A unicast match will be signalled if the unicast hash enable bit is set, da[0] is 0 and the | |
501 | * hash index points to a bit set in the hash register. | |
502 | * To receive all multicast frames, the hash register should be set with all ones and the | |
503 | * multicast hash enable bit should be set in the network configuration register. | |
504 | */ | |
505 | ||
506 | /* | |
507 | * Return the hash index value for the specified address. | |
508 | */ | |
509 | static int hash_get_index(__u8 *addr) | |
510 | { | |
511 | int i, j, bitval; | |
512 | int hash_index = 0; | |
513 | ||
514 | for (j = 0; j < 6; j++) { | |
515 | for (i = 0, bitval = 0; i < 8; i++) | |
516 | bitval ^= hash_bit_value(i*6 + j, addr); | |
517 | ||
518 | hash_index |= (bitval << j); | |
519 | } | |
520 | ||
427d269f | 521 | return hash_index; |
d4b7780e AV |
522 | } |
523 | ||
524 | /* | |
525 | * Add multicast addresses to the internal multicast-hash table. | |
526 | */ | |
527 | static void at91ether_sethashtable(struct net_device *dev) | |
528 | { | |
529 | struct dev_mc_list *curr; | |
530 | unsigned long mc_filter[2]; | |
531 | unsigned int i, bitnr; | |
532 | ||
533 | mc_filter[0] = mc_filter[1] = 0; | |
534 | ||
535 | curr = dev->mc_list; | |
536 | for (i = 0; i < dev->mc_count; i++, curr = curr->next) { | |
537 | if (!curr) break; /* unexpected end of list */ | |
538 | ||
539 | bitnr = hash_get_index(curr->dmi_addr); | |
540 | mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); | |
541 | } | |
542 | ||
543 | at91_emac_write(AT91_EMAC_HSH, mc_filter[0]); | |
544 | at91_emac_write(AT91_EMAC_HSL, mc_filter[1]); | |
545 | } | |
546 | ||
547 | /* | |
548 | * Enable/Disable promiscuous and multicast modes. | |
549 | */ | |
550 | static void at91ether_set_rx_mode(struct net_device *dev) | |
551 | { | |
552 | unsigned long cfg; | |
553 | ||
554 | cfg = at91_emac_read(AT91_EMAC_CFG); | |
555 | ||
556 | if (dev->flags & IFF_PROMISC) /* Enable promiscuous mode */ | |
557 | cfg |= AT91_EMAC_CAF; | |
558 | else if (dev->flags & (~IFF_PROMISC)) /* Disable promiscuous mode */ | |
559 | cfg &= ~AT91_EMAC_CAF; | |
560 | ||
561 | if (dev->flags & IFF_ALLMULTI) { /* Enable all multicast mode */ | |
562 | at91_emac_write(AT91_EMAC_HSH, -1); | |
563 | at91_emac_write(AT91_EMAC_HSL, -1); | |
564 | cfg |= AT91_EMAC_MTI; | |
565 | } else if (dev->mc_count > 0) { /* Enable specific multicasts */ | |
566 | at91ether_sethashtable(dev); | |
567 | cfg |= AT91_EMAC_MTI; | |
568 | } else if (dev->flags & (~IFF_ALLMULTI)) { /* Disable all multicast mode */ | |
569 | at91_emac_write(AT91_EMAC_HSH, 0); | |
570 | at91_emac_write(AT91_EMAC_HSL, 0); | |
571 | cfg &= ~AT91_EMAC_MTI; | |
572 | } | |
573 | ||
574 | at91_emac_write(AT91_EMAC_CFG, cfg); | |
575 | } | |
576 | ||
d4b7780e AV |
577 | /* ......................... ETHTOOL SUPPORT ........................... */ |
578 | ||
d4b7780e AV |
579 | static int mdio_read(struct net_device *dev, int phy_id, int location) |
580 | { | |
581 | unsigned int value; | |
582 | ||
583 | read_phy(phy_id, location, &value); | |
584 | return value; | |
585 | } | |
586 | ||
587 | static void mdio_write(struct net_device *dev, int phy_id, int location, int value) | |
588 | { | |
589 | write_phy(phy_id, location, value); | |
590 | } | |
591 | ||
592 | static int at91ether_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
593 | { | |
594 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
595 | int ret; | |
596 | ||
597 | spin_lock_irq(&lp->lock); | |
598 | enable_mdi(); | |
599 | ||
600 | ret = mii_ethtool_gset(&lp->mii, cmd); | |
601 | ||
602 | disable_mdi(); | |
603 | spin_unlock_irq(&lp->lock); | |
604 | ||
605 | if (lp->phy_media == PORT_FIBRE) { /* override media type since mii.c doesn't know */ | |
606 | cmd->supported = SUPPORTED_FIBRE; | |
607 | cmd->port = PORT_FIBRE; | |
608 | } | |
609 | ||
610 | return ret; | |
611 | } | |
612 | ||
613 | static int at91ether_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
614 | { | |
615 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
616 | int ret; | |
617 | ||
618 | spin_lock_irq(&lp->lock); | |
619 | enable_mdi(); | |
620 | ||
621 | ret = mii_ethtool_sset(&lp->mii, cmd); | |
622 | ||
623 | disable_mdi(); | |
624 | spin_unlock_irq(&lp->lock); | |
625 | ||
626 | return ret; | |
627 | } | |
628 | ||
629 | static int at91ether_nwayreset(struct net_device *dev) | |
630 | { | |
631 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
632 | int ret; | |
633 | ||
634 | spin_lock_irq(&lp->lock); | |
635 | enable_mdi(); | |
636 | ||
637 | ret = mii_nway_restart(&lp->mii); | |
638 | ||
639 | disable_mdi(); | |
640 | spin_unlock_irq(&lp->lock); | |
641 | ||
642 | return ret; | |
643 | } | |
644 | ||
645 | static void at91ether_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
646 | { | |
647 | strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); | |
648 | strlcpy(info->version, DRV_VERSION, sizeof(info->version)); | |
649 | strlcpy(info->bus_info, dev->class_dev.dev->bus_id, sizeof(info->bus_info)); | |
650 | } | |
651 | ||
652 | static struct ethtool_ops at91ether_ethtool_ops = { | |
653 | .get_settings = at91ether_get_settings, | |
654 | .set_settings = at91ether_set_settings, | |
655 | .get_drvinfo = at91ether_get_drvinfo, | |
656 | .nway_reset = at91ether_nwayreset, | |
657 | .get_link = ethtool_op_get_link, | |
658 | }; | |
659 | ||
ca5585ed AV |
660 | static int at91ether_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
661 | { | |
662 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
663 | int res; | |
664 | ||
665 | if (!netif_running(dev)) | |
666 | return -EINVAL; | |
667 | ||
668 | spin_lock_irq(&lp->lock); | |
669 | enable_mdi(); | |
670 | res = generic_mii_ioctl(&lp->mii, if_mii(rq), cmd, NULL); | |
671 | disable_mdi(); | |
672 | spin_unlock_irq(&lp->lock); | |
673 | ||
674 | return res; | |
675 | } | |
d4b7780e AV |
676 | |
677 | /* ................................ MAC ................................ */ | |
678 | ||
679 | /* | |
680 | * Initialize and start the Receiver and Transmit subsystems | |
681 | */ | |
682 | static void at91ether_start(struct net_device *dev) | |
683 | { | |
684 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
685 | struct recv_desc_bufs *dlist, *dlist_phys; | |
686 | int i; | |
687 | unsigned long ctl; | |
688 | ||
689 | dlist = lp->dlist; | |
690 | dlist_phys = lp->dlist_phys; | |
691 | ||
692 | for (i = 0; i < MAX_RX_DESCR; i++) { | |
693 | dlist->descriptors[i].addr = (unsigned int) &dlist_phys->recv_buf[i][0]; | |
694 | dlist->descriptors[i].size = 0; | |
695 | } | |
696 | ||
697 | /* Set the Wrap bit on the last descriptor */ | |
698 | dlist->descriptors[i-1].addr |= EMAC_DESC_WRAP; | |
699 | ||
700 | /* Reset buffer index */ | |
701 | lp->rxBuffIndex = 0; | |
702 | ||
703 | /* Program address of descriptor list in Rx Buffer Queue register */ | |
704 | at91_emac_write(AT91_EMAC_RBQP, (unsigned long) dlist_phys); | |
705 | ||
706 | /* Enable Receive and Transmit */ | |
707 | ctl = at91_emac_read(AT91_EMAC_CTL); | |
708 | at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_RE | AT91_EMAC_TE); | |
709 | } | |
710 | ||
711 | /* | |
712 | * Open the ethernet interface | |
713 | */ | |
714 | static int at91ether_open(struct net_device *dev) | |
715 | { | |
716 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
717 | unsigned long ctl; | |
718 | ||
427d269f AV |
719 | if (!is_valid_ether_addr(dev->dev_addr)) |
720 | return -EADDRNOTAVAIL; | |
d4b7780e | 721 | |
427d269f | 722 | clk_enable(lp->ether_clk); /* Re-enable Peripheral clock */ |
d4b7780e AV |
723 | |
724 | /* Clear internal statistics */ | |
725 | ctl = at91_emac_read(AT91_EMAC_CTL); | |
726 | at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_CSR); | |
727 | ||
728 | /* Update the MAC address (incase user has changed it) */ | |
729 | update_mac_address(dev); | |
730 | ||
731 | /* Enable PHY interrupt */ | |
732 | enable_phyirq(dev); | |
733 | ||
734 | /* Enable MAC interrupts */ | |
735 | at91_emac_write(AT91_EMAC_IER, 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 | /* Determine current link speed */ | |
740 | spin_lock_irq(&lp->lock); | |
741 | enable_mdi(); | |
775637df | 742 | update_linkspeed(dev, 0); |
d4b7780e AV |
743 | disable_mdi(); |
744 | spin_unlock_irq(&lp->lock); | |
745 | ||
746 | at91ether_start(dev); | |
747 | netif_start_queue(dev); | |
748 | return 0; | |
749 | } | |
750 | ||
751 | /* | |
752 | * Close the interface | |
753 | */ | |
754 | static int at91ether_close(struct net_device *dev) | |
755 | { | |
427d269f | 756 | struct at91_private *lp = (struct at91_private *) dev->priv; |
d4b7780e AV |
757 | unsigned long ctl; |
758 | ||
759 | /* Disable Receiver and Transmitter */ | |
760 | ctl = at91_emac_read(AT91_EMAC_CTL); | |
761 | at91_emac_write(AT91_EMAC_CTL, ctl & ~(AT91_EMAC_TE | AT91_EMAC_RE)); | |
762 | ||
763 | /* Disable PHY interrupt */ | |
764 | disable_phyirq(dev); | |
765 | ||
766 | /* Disable MAC interrupts */ | |
767 | at91_emac_write(AT91_EMAC_IDR, AT91_EMAC_RCOM | AT91_EMAC_RBNA | |
768 | | AT91_EMAC_TUND | AT91_EMAC_RTRY | AT91_EMAC_TCOM | |
769 | | AT91_EMAC_ROVR | AT91_EMAC_ABT); | |
770 | ||
771 | netif_stop_queue(dev); | |
772 | ||
427d269f | 773 | clk_disable(lp->ether_clk); /* Disable Peripheral clock */ |
d4b7780e AV |
774 | |
775 | return 0; | |
776 | } | |
777 | ||
778 | /* | |
779 | * Transmit packet. | |
780 | */ | |
781 | static int at91ether_tx(struct sk_buff *skb, struct net_device *dev) | |
782 | { | |
783 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
784 | ||
785 | if (at91_emac_read(AT91_EMAC_TSR) & AT91_EMAC_TSR_BNQ) { | |
786 | netif_stop_queue(dev); | |
787 | ||
788 | /* Store packet information (to free when Tx completed) */ | |
789 | lp->skb = skb; | |
790 | lp->skb_length = skb->len; | |
791 | lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len, DMA_TO_DEVICE); | |
792 | lp->stats.tx_bytes += skb->len; | |
793 | ||
794 | /* Set address of the data in the Transmit Address register */ | |
795 | at91_emac_write(AT91_EMAC_TAR, lp->skb_physaddr); | |
796 | /* Set length of the packet in the Transmit Control register */ | |
797 | at91_emac_write(AT91_EMAC_TCR, skb->len); | |
798 | ||
799 | dev->trans_start = jiffies; | |
800 | } else { | |
801 | printk(KERN_ERR "at91_ether.c: at91ether_tx() called, but device is busy!\n"); | |
802 | return 1; /* if we return anything but zero, dev.c:1055 calls kfree_skb(skb) | |
803 | on this skb, he also reports -ENETDOWN and printk's, so either | |
804 | we free and return(0) or don't free and return 1 */ | |
805 | } | |
806 | ||
807 | return 0; | |
808 | } | |
809 | ||
810 | /* | |
811 | * Update the current statistics from the internal statistics registers. | |
812 | */ | |
813 | static struct net_device_stats *at91ether_stats(struct net_device *dev) | |
814 | { | |
815 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
816 | int ale, lenerr, seqe, lcol, ecol; | |
817 | ||
818 | if (netif_running(dev)) { | |
819 | lp->stats.rx_packets += at91_emac_read(AT91_EMAC_OK); /* Good frames received */ | |
820 | ale = at91_emac_read(AT91_EMAC_ALE); | |
821 | lp->stats.rx_frame_errors += ale; /* Alignment errors */ | |
822 | lenerr = at91_emac_read(AT91_EMAC_ELR) + at91_emac_read(AT91_EMAC_USF); | |
823 | lp->stats.rx_length_errors += lenerr; /* Excessive Length or Undersize Frame error */ | |
824 | seqe = at91_emac_read(AT91_EMAC_SEQE); | |
825 | lp->stats.rx_crc_errors += seqe; /* CRC error */ | |
826 | lp->stats.rx_fifo_errors += at91_emac_read(AT91_EMAC_DRFC); /* Receive buffer not available */ | |
827 | lp->stats.rx_errors += (ale + lenerr + seqe | |
828 | + at91_emac_read(AT91_EMAC_CDE) + at91_emac_read(AT91_EMAC_RJB)); | |
829 | ||
830 | lp->stats.tx_packets += at91_emac_read(AT91_EMAC_FRA); /* Frames successfully transmitted */ | |
831 | lp->stats.tx_fifo_errors += at91_emac_read(AT91_EMAC_TUE); /* Transmit FIFO underruns */ | |
832 | lp->stats.tx_carrier_errors += at91_emac_read(AT91_EMAC_CSE); /* Carrier Sense errors */ | |
833 | lp->stats.tx_heartbeat_errors += at91_emac_read(AT91_EMAC_SQEE);/* Heartbeat error */ | |
834 | ||
835 | lcol = at91_emac_read(AT91_EMAC_LCOL); | |
836 | ecol = at91_emac_read(AT91_EMAC_ECOL); | |
837 | lp->stats.tx_window_errors += lcol; /* Late collisions */ | |
838 | lp->stats.tx_aborted_errors += ecol; /* 16 collisions */ | |
839 | ||
840 | lp->stats.collisions += (at91_emac_read(AT91_EMAC_SCOL) + at91_emac_read(AT91_EMAC_MCOL) + lcol + ecol); | |
841 | } | |
842 | return &lp->stats; | |
843 | } | |
844 | ||
845 | /* | |
846 | * Extract received frame from buffer descriptors and sent to upper layers. | |
847 | * (Called from interrupt context) | |
848 | */ | |
849 | static void at91ether_rx(struct net_device *dev) | |
850 | { | |
851 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
852 | struct recv_desc_bufs *dlist; | |
853 | unsigned char *p_recv; | |
854 | struct sk_buff *skb; | |
855 | unsigned int pktlen; | |
856 | ||
857 | dlist = lp->dlist; | |
858 | while (dlist->descriptors[lp->rxBuffIndex].addr & EMAC_DESC_DONE) { | |
859 | p_recv = dlist->recv_buf[lp->rxBuffIndex]; | |
860 | pktlen = dlist->descriptors[lp->rxBuffIndex].size & 0x7ff; /* Length of frame including FCS */ | |
861 | skb = alloc_skb(pktlen + 2, GFP_ATOMIC); | |
862 | if (skb != NULL) { | |
863 | skb_reserve(skb, 2); | |
864 | memcpy(skb_put(skb, pktlen), p_recv, pktlen); | |
865 | ||
866 | skb->dev = dev; | |
867 | skb->protocol = eth_type_trans(skb, dev); | |
868 | skb->len = pktlen; | |
869 | dev->last_rx = jiffies; | |
870 | lp->stats.rx_bytes += pktlen; | |
871 | netif_rx(skb); | |
872 | } | |
873 | else { | |
874 | lp->stats.rx_dropped += 1; | |
875 | printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); | |
876 | } | |
877 | ||
878 | if (dlist->descriptors[lp->rxBuffIndex].size & EMAC_MULTICAST) | |
879 | lp->stats.multicast++; | |
880 | ||
881 | dlist->descriptors[lp->rxBuffIndex].addr &= ~EMAC_DESC_DONE; /* reset ownership bit */ | |
882 | if (lp->rxBuffIndex == MAX_RX_DESCR-1) /* wrap after last buffer */ | |
883 | lp->rxBuffIndex = 0; | |
884 | else | |
885 | lp->rxBuffIndex++; | |
886 | } | |
887 | } | |
888 | ||
889 | /* | |
890 | * MAC interrupt handler | |
891 | */ | |
892 | static irqreturn_t at91ether_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
893 | { | |
894 | struct net_device *dev = (struct net_device *) dev_id; | |
895 | struct at91_private *lp = (struct at91_private *) dev->priv; | |
896 | unsigned long intstatus, ctl; | |
897 | ||
898 | /* MAC Interrupt Status register indicates what interrupts are pending. | |
899 | It is automatically cleared once read. */ | |
900 | intstatus = at91_emac_read(AT91_EMAC_ISR); | |
901 | ||
902 | if (intstatus & AT91_EMAC_RCOM) /* Receive complete */ | |
903 | at91ether_rx(dev); | |
904 | ||
427d269f | 905 | if (intstatus & AT91_EMAC_TCOM) { /* Transmit complete */ |
d4b7780e AV |
906 | /* The TCOM bit is set even if the transmission failed. */ |
907 | if (intstatus & (AT91_EMAC_TUND | AT91_EMAC_RTRY)) | |
908 | lp->stats.tx_errors += 1; | |
909 | ||
910 | if (lp->skb) { | |
911 | dev_kfree_skb_irq(lp->skb); | |
912 | lp->skb = NULL; | |
913 | dma_unmap_single(NULL, lp->skb_physaddr, lp->skb_length, DMA_TO_DEVICE); | |
914 | } | |
915 | netif_wake_queue(dev); | |
916 | } | |
917 | ||
918 | /* Work-around for Errata #11 */ | |
919 | if (intstatus & AT91_EMAC_RBNA) { | |
920 | ctl = at91_emac_read(AT91_EMAC_CTL); | |
921 | at91_emac_write(AT91_EMAC_CTL, ctl & ~AT91_EMAC_RE); | |
922 | at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_RE); | |
923 | } | |
924 | ||
925 | if (intstatus & AT91_EMAC_ROVR) | |
926 | printk("%s: ROVR error\n", dev->name); | |
927 | ||
928 | return IRQ_HANDLED; | |
929 | } | |
930 | ||
931 | /* | |
932 | * Initialize the ethernet interface | |
933 | */ | |
427d269f AV |
934 | static int __init at91ether_setup(unsigned long phy_type, unsigned short phy_address, |
935 | struct platform_device *pdev, struct clk *ether_clk) | |
d4b7780e AV |
936 | { |
937 | struct at91_eth_data *board_data = pdev->dev.platform_data; | |
938 | struct net_device *dev; | |
939 | struct at91_private *lp; | |
940 | unsigned int val; | |
941 | int res; | |
942 | ||
943 | if (at91_dev) /* already initialized */ | |
944 | return 0; | |
945 | ||
946 | dev = alloc_etherdev(sizeof(struct at91_private)); | |
947 | if (!dev) | |
948 | return -ENOMEM; | |
949 | ||
950 | dev->base_addr = AT91_VA_BASE_EMAC; | |
951 | dev->irq = AT91_ID_EMAC; | |
952 | SET_MODULE_OWNER(dev); | |
953 | ||
954 | /* Install the interrupt handler */ | |
955 | if (request_irq(dev->irq, at91ether_interrupt, 0, dev->name, dev)) { | |
956 | free_netdev(dev); | |
957 | return -EBUSY; | |
958 | } | |
959 | ||
960 | /* Allocate memory for DMA Receive descriptors */ | |
961 | lp = (struct at91_private *)dev->priv; | |
962 | lp->dlist = (struct recv_desc_bufs *) dma_alloc_coherent(NULL, sizeof(struct recv_desc_bufs), (dma_addr_t *) &lp->dlist_phys, GFP_KERNEL); | |
963 | if (lp->dlist == NULL) { | |
964 | free_irq(dev->irq, dev); | |
965 | free_netdev(dev); | |
966 | return -ENOMEM; | |
967 | } | |
968 | lp->board_data = *board_data; | |
427d269f | 969 | lp->ether_clk = ether_clk; |
d4b7780e AV |
970 | platform_set_drvdata(pdev, dev); |
971 | ||
972 | spin_lock_init(&lp->lock); | |
973 | ||
974 | ether_setup(dev); | |
975 | dev->open = at91ether_open; | |
976 | dev->stop = at91ether_close; | |
977 | dev->hard_start_xmit = at91ether_tx; | |
978 | dev->get_stats = at91ether_stats; | |
979 | dev->set_multicast_list = at91ether_set_rx_mode; | |
980 | dev->set_mac_address = set_mac_address; | |
981 | dev->ethtool_ops = &at91ether_ethtool_ops; | |
ca5585ed | 982 | dev->do_ioctl = at91ether_ioctl; |
d4b7780e AV |
983 | |
984 | SET_NETDEV_DEV(dev, &pdev->dev); | |
985 | ||
986 | get_mac_address(dev); /* Get ethernet address and store it in dev->dev_addr */ | |
987 | update_mac_address(dev); /* Program ethernet address into MAC */ | |
988 | ||
989 | at91_emac_write(AT91_EMAC_CTL, 0); | |
990 | ||
991 | if (lp->board_data.is_rmii) | |
992 | at91_emac_write(AT91_EMAC_CFG, AT91_EMAC_CLK_DIV32 | AT91_EMAC_BIG | AT91_EMAC_RMII); | |
993 | else | |
994 | at91_emac_write(AT91_EMAC_CFG, AT91_EMAC_CLK_DIV32 | AT91_EMAC_BIG); | |
995 | ||
996 | /* Perform PHY-specific initialization */ | |
997 | spin_lock_irq(&lp->lock); | |
998 | enable_mdi(); | |
999 | if ((phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) { | |
1000 | read_phy(phy_address, MII_DSCR_REG, &val); | |
1001 | if ((val & (1 << 10)) == 0) /* DSCR bit 10 is 0 -- fiber mode */ | |
1002 | lp->phy_media = PORT_FIBRE; | |
1003 | } else if (machine_is_csb337()) { | |
1004 | /* mix link activity status into LED2 link state */ | |
1005 | write_phy(phy_address, MII_LEDCTRL_REG, 0x0d22); | |
1006 | } | |
1007 | disable_mdi(); | |
1008 | spin_unlock_irq(&lp->lock); | |
1009 | ||
1010 | lp->mii.dev = dev; /* Support for ethtool */ | |
1011 | lp->mii.mdio_read = mdio_read; | |
1012 | lp->mii.mdio_write = mdio_write; | |
ca5585ed AV |
1013 | lp->mii.phy_id = phy_address; |
1014 | lp->mii.phy_id_mask = 0x1f; | |
1015 | lp->mii.reg_num_mask = 0x1f; | |
d4b7780e AV |
1016 | |
1017 | lp->phy_type = phy_type; /* Type of PHY connected */ | |
1018 | lp->phy_address = phy_address; /* MDI address of PHY */ | |
1019 | ||
1020 | /* Register the network interface */ | |
1021 | res = register_netdev(dev); | |
1022 | if (res) { | |
1023 | free_irq(dev->irq, dev); | |
1024 | free_netdev(dev); | |
1025 | dma_free_coherent(NULL, sizeof(struct recv_desc_bufs), lp->dlist, (dma_addr_t)lp->dlist_phys); | |
1026 | return res; | |
1027 | } | |
1028 | at91_dev = dev; | |
1029 | ||
1030 | /* Determine current link speed */ | |
1031 | spin_lock_irq(&lp->lock); | |
1032 | enable_mdi(); | |
775637df | 1033 | update_linkspeed(dev, 0); |
d4b7780e AV |
1034 | disable_mdi(); |
1035 | spin_unlock_irq(&lp->lock); | |
1036 | netif_carrier_off(dev); /* will be enabled in open() */ | |
1037 | ||
775637df AV |
1038 | /* If board has no PHY IRQ, use a timer to poll the PHY */ |
1039 | if (!lp->board_data.phy_irq_pin) { | |
1040 | init_timer(&check_timer); | |
1041 | check_timer.data = (unsigned long)dev; | |
1042 | check_timer.function = at91ether_check_link; | |
1043 | } | |
1044 | ||
d4b7780e AV |
1045 | /* Display ethernet banner */ |
1046 | printk(KERN_INFO "%s: AT91 ethernet at 0x%08x int=%d %s%s (%02x:%02x:%02x:%02x:%02x:%02x)\n", | |
1047 | dev->name, (uint) dev->base_addr, dev->irq, | |
1048 | at91_emac_read(AT91_EMAC_CFG) & AT91_EMAC_SPD ? "100-" : "10-", | |
1049 | at91_emac_read(AT91_EMAC_CFG) & AT91_EMAC_FD ? "FullDuplex" : "HalfDuplex", | |
1050 | dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], | |
1051 | dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); | |
1052 | if ((phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) | |
427d269f | 1053 | printk(KERN_INFO "%s: Davicom 9161 PHY %s\n", dev->name, (lp->phy_media == PORT_FIBRE) ? "(Fiber)" : "(Copper)"); |
d4b7780e AV |
1054 | else if (phy_type == MII_LXT971A_ID) |
1055 | printk(KERN_INFO "%s: Intel LXT971A PHY\n", dev->name); | |
1056 | else if (phy_type == MII_RTL8201_ID) | |
1057 | printk(KERN_INFO "%s: Realtek RTL8201(B)L PHY\n", dev->name); | |
1058 | else if (phy_type == MII_BCM5221_ID) | |
1059 | printk(KERN_INFO "%s: Broadcom BCM5221 PHY\n", dev->name); | |
1060 | else if (phy_type == MII_DP83847_ID) | |
1061 | printk(KERN_INFO "%s: National Semiconductor DP83847 PHY\n", dev->name); | |
1062 | else if (phy_type == MII_AC101L_ID) | |
1063 | printk(KERN_INFO "%s: Altima AC101L PHY\n", dev->name); | |
1064 | else if (phy_type == MII_KS8721_ID) | |
1065 | printk(KERN_INFO "%s: Micrel KS8721 PHY\n", dev->name); | |
1066 | ||
1067 | return 0; | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * Detect MAC and PHY and perform initialization | |
1072 | */ | |
1073 | static int __init at91ether_probe(struct platform_device *pdev) | |
1074 | { | |
1075 | unsigned int phyid1, phyid2; | |
1076 | int detected = -1; | |
1077 | unsigned long phy_id; | |
1078 | unsigned short phy_address = 0; | |
427d269f | 1079 | struct clk *ether_clk; |
d4b7780e AV |
1080 | |
1081 | ether_clk = clk_get(&pdev->dev, "ether_clk"); | |
427d269f | 1082 | if (IS_ERR(ether_clk)) { |
d4b7780e AV |
1083 | printk(KERN_ERR "at91_ether: no clock defined\n"); |
1084 | return -ENODEV; | |
1085 | } | |
1086 | clk_enable(ether_clk); /* Enable Peripheral clock */ | |
1087 | ||
1088 | while ((detected != 0) && (phy_address < 32)) { | |
1089 | /* Read the PHY ID registers */ | |
1090 | enable_mdi(); | |
1091 | read_phy(phy_address, MII_PHYSID1, &phyid1); | |
1092 | read_phy(phy_address, MII_PHYSID2, &phyid2); | |
1093 | disable_mdi(); | |
1094 | ||
1095 | phy_id = (phyid1 << 16) | (phyid2 & 0xfff0); | |
1096 | switch (phy_id) { | |
1097 | case MII_DM9161_ID: /* Davicom 9161: PHY_ID1 = 0x181, PHY_ID2 = B881 */ | |
1098 | case MII_DM9161A_ID: /* Davicom 9161A: PHY_ID1 = 0x181, PHY_ID2 = B8A0 */ | |
1099 | case MII_LXT971A_ID: /* Intel LXT971A: PHY_ID1 = 0x13, PHY_ID2 = 78E0 */ | |
1100 | case MII_RTL8201_ID: /* Realtek RTL8201: PHY_ID1 = 0, PHY_ID2 = 0x8201 */ | |
1101 | case MII_BCM5221_ID: /* Broadcom BCM5221: PHY_ID1 = 0x40, PHY_ID2 = 0x61e0 */ | |
1102 | case MII_DP83847_ID: /* National Semiconductor DP83847: */ | |
1103 | case MII_AC101L_ID: /* Altima AC101L: PHY_ID1 = 0x22, PHY_ID2 = 0x5520 */ | |
1104 | case MII_KS8721_ID: /* Micrel KS8721: PHY_ID1 = 0x22, PHY_ID2 = 0x1610 */ | |
427d269f | 1105 | detected = at91ether_setup(phy_id, phy_address, pdev, ether_clk); |
d4b7780e AV |
1106 | break; |
1107 | } | |
1108 | ||
1109 | phy_address++; | |
1110 | } | |
1111 | ||
1112 | clk_disable(ether_clk); /* Disable Peripheral clock */ | |
1113 | ||
1114 | return detected; | |
1115 | } | |
1116 | ||
1117 | static int __devexit at91ether_remove(struct platform_device *pdev) | |
1118 | { | |
1119 | struct at91_private *lp = (struct at91_private *) at91_dev->priv; | |
1120 | ||
1121 | unregister_netdev(at91_dev); | |
1122 | free_irq(at91_dev->irq, at91_dev); | |
1123 | dma_free_coherent(NULL, sizeof(struct recv_desc_bufs), lp->dlist, (dma_addr_t)lp->dlist_phys); | |
427d269f | 1124 | clk_put(lp->ether_clk); |
d4b7780e AV |
1125 | |
1126 | free_netdev(at91_dev); | |
1127 | at91_dev = NULL; | |
1128 | return 0; | |
1129 | } | |
1130 | ||
00e5edcb AV |
1131 | #ifdef CONFIG_PM |
1132 | ||
1133 | static int at91ether_suspend(struct platform_device *pdev, pm_message_t mesg) | |
1134 | { | |
1135 | struct at91_private *lp = (struct at91_private *) at91_dev->priv; | |
1136 | struct net_device *net_dev = platform_get_drvdata(pdev); | |
1137 | int phy_irq = lp->board_data.phy_irq_pin; | |
1138 | ||
1139 | if (netif_running(net_dev)) { | |
1140 | if (phy_irq) | |
1141 | disable_irq(phy_irq); | |
1142 | ||
1143 | netif_stop_queue(net_dev); | |
1144 | netif_device_detach(net_dev); | |
1145 | ||
1146 | clk_disable(lp->ether_clk); | |
1147 | } | |
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | static int at91ether_resume(struct platform_device *pdev) | |
1152 | { | |
1153 | struct at91_private *lp = (struct at91_private *) at91_dev->priv; | |
1154 | struct net_device *net_dev = platform_get_drvdata(pdev); | |
1155 | int phy_irq = lp->board_data.phy_irq_pin; | |
1156 | ||
1157 | if (netif_running(net_dev)) { | |
1158 | clk_enable(lp->ether_clk); | |
1159 | ||
1160 | netif_device_attach(net_dev); | |
1161 | netif_start_queue(net_dev); | |
1162 | ||
1163 | if (phy_irq) | |
1164 | enable_irq(phy_irq); | |
1165 | } | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | #else | |
1170 | #define at91ether_suspend NULL | |
1171 | #define at91ether_resume NULL | |
1172 | #endif | |
1173 | ||
d4b7780e AV |
1174 | static struct platform_driver at91ether_driver = { |
1175 | .probe = at91ether_probe, | |
1176 | .remove = __devexit_p(at91ether_remove), | |
00e5edcb AV |
1177 | .suspend = at91ether_suspend, |
1178 | .resume = at91ether_resume, | |
d4b7780e AV |
1179 | .driver = { |
1180 | .name = DRV_NAME, | |
1181 | .owner = THIS_MODULE, | |
1182 | }, | |
1183 | }; | |
1184 | ||
1185 | static int __init at91ether_init(void) | |
1186 | { | |
1187 | return platform_driver_register(&at91ether_driver); | |
1188 | } | |
1189 | ||
1190 | static void __exit at91ether_exit(void) | |
1191 | { | |
1192 | platform_driver_unregister(&at91ether_driver); | |
1193 | } | |
1194 | ||
1195 | module_init(at91ether_init) | |
1196 | module_exit(at91ether_exit) | |
1197 | ||
1198 | MODULE_LICENSE("GPL"); | |
1199 | MODULE_DESCRIPTION("AT91RM9200 EMAC Ethernet driver"); | |
1200 | MODULE_AUTHOR("Andrew Victor"); |