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1da177e4 LT |
1 | /* |
2 | * linux/drivers/net/am79c961.c | |
3 | * | |
4 | * by Russell King <rmk@arm.linux.org.uk> 1995-2001. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * Derived from various things including skeleton.c | |
11 | * | |
12 | * This is a special driver for the am79c961A Lance chip used in the | |
13 | * Intel (formally Digital Equipment Corp) EBSA110 platform. Please | |
14 | * note that this can not be built as a module (it doesn't make sense). | |
15 | */ | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/types.h> | |
1da177e4 LT |
18 | #include <linux/interrupt.h> |
19 | #include <linux/ioport.h> | |
1da177e4 LT |
20 | #include <linux/slab.h> |
21 | #include <linux/string.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/netdevice.h> | |
24 | #include <linux/etherdevice.h> | |
1da177e4 LT |
25 | #include <linux/delay.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/crc32.h> | |
28 | #include <linux/bitops.h> | |
37bb30e8 | 29 | #include <linux/platform_device.h> |
99730225 | 30 | #include <linux/io.h> |
1da177e4 | 31 | |
a09e64fb | 32 | #include <mach/hardware.h> |
37bb30e8 | 33 | #include <asm/system.h> |
1da177e4 LT |
34 | |
35 | #define TX_BUFFERS 15 | |
36 | #define RX_BUFFERS 25 | |
37 | ||
38 | #include "am79c961a.h" | |
39 | ||
40 | static irqreturn_t | |
7d12e780 | 41 | am79c961_interrupt (int irq, void *dev_id); |
1da177e4 LT |
42 | |
43 | static unsigned int net_debug = NET_DEBUG; | |
44 | ||
45 | static const char version[] = | |
46 | "am79c961 ethernet driver (C) 1995-2001 Russell King v0.04\n"; | |
47 | ||
48 | /* --------------------------------------------------------------------------- */ | |
49 | ||
50 | #ifdef __arm__ | |
51 | static void write_rreg(u_long base, u_int reg, u_int val) | |
52 | { | |
d814dee0 | 53 | asm volatile( |
1da177e4 LT |
54 | "str%?h %1, [%2] @ NET_RAP\n\t" |
55 | "str%?h %0, [%2, #-4] @ NET_RDP" | |
56 | : | |
57 | : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464)); | |
58 | } | |
59 | ||
60 | static inline unsigned short read_rreg(u_long base_addr, u_int reg) | |
61 | { | |
62 | unsigned short v; | |
d814dee0 | 63 | asm volatile( |
1da177e4 LT |
64 | "str%?h %1, [%2] @ NET_RAP\n\t" |
65 | "ldr%?h %0, [%2, #-4] @ NET_RDP" | |
66 | : "=r" (v) | |
67 | : "r" (reg), "r" (ISAIO_BASE + 0x0464)); | |
68 | return v; | |
69 | } | |
70 | ||
71 | static inline void write_ireg(u_long base, u_int reg, u_int val) | |
72 | { | |
d814dee0 | 73 | asm volatile( |
1da177e4 LT |
74 | "str%?h %1, [%2] @ NET_RAP\n\t" |
75 | "str%?h %0, [%2, #8] @ NET_IDP" | |
76 | : | |
77 | : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464)); | |
78 | } | |
79 | ||
80 | static inline unsigned short read_ireg(u_long base_addr, u_int reg) | |
81 | { | |
82 | u_short v; | |
d814dee0 | 83 | asm volatile( |
1da177e4 | 84 | "str%?h %1, [%2] @ NAT_RAP\n\t" |
0e3a64e2 | 85 | "ldr%?h %0, [%2, #8] @ NET_IDP\n\t" |
1da177e4 LT |
86 | : "=r" (v) |
87 | : "r" (reg), "r" (ISAIO_BASE + 0x0464)); | |
88 | return v; | |
89 | } | |
90 | ||
91 | #define am_writeword(dev,off,val) __raw_writew(val, ISAMEM_BASE + ((off) << 1)) | |
92 | #define am_readword(dev,off) __raw_readw(ISAMEM_BASE + ((off) << 1)) | |
93 | ||
f7777378 | 94 | static void |
1da177e4 LT |
95 | am_writebuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length) |
96 | { | |
97 | offset = ISAMEM_BASE + (offset << 1); | |
98 | length = (length + 1) & ~1; | |
99 | if ((int)buf & 2) { | |
f7777378 | 100 | asm volatile("str%?h %2, [%0], #4" |
1da177e4 LT |
101 | : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8))); |
102 | buf += 2; | |
103 | length -= 2; | |
104 | } | |
105 | while (length > 8) { | |
f7777378 RKAL |
106 | register unsigned int tmp asm("r2"), tmp2 asm("r3"); |
107 | asm volatile( | |
108 | "ldm%?ia %0!, {%1, %2}" | |
109 | : "+r" (buf), "=&r" (tmp), "=&r" (tmp2)); | |
110 | length -= 8; | |
111 | asm volatile( | |
112 | "str%?h %1, [%0], #4\n\t" | |
113 | "mov%? %1, %1, lsr #16\n\t" | |
114 | "str%?h %1, [%0], #4\n\t" | |
1da177e4 LT |
115 | "str%?h %2, [%0], #4\n\t" |
116 | "mov%? %2, %2, lsr #16\n\t" | |
f7777378 RKAL |
117 | "str%?h %2, [%0], #4" |
118 | : "+r" (offset), "=&r" (tmp), "=&r" (tmp2)); | |
1da177e4 LT |
119 | } |
120 | while (length > 0) { | |
f7777378 | 121 | asm volatile("str%?h %2, [%0], #4" |
1da177e4 LT |
122 | : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8))); |
123 | buf += 2; | |
124 | length -= 2; | |
125 | } | |
126 | } | |
127 | ||
f7777378 | 128 | static void |
1da177e4 LT |
129 | am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length) |
130 | { | |
131 | offset = ISAMEM_BASE + (offset << 1); | |
132 | length = (length + 1) & ~1; | |
133 | if ((int)buf & 2) { | |
134 | unsigned int tmp; | |
d814dee0 | 135 | asm volatile( |
1da177e4 LT |
136 | "ldr%?h %2, [%0], #4\n\t" |
137 | "str%?b %2, [%1], #1\n\t" | |
138 | "mov%? %2, %2, lsr #8\n\t" | |
139 | "str%?b %2, [%1], #1" | |
140 | : "=&r" (offset), "=&r" (buf), "=r" (tmp): "0" (offset), "1" (buf)); | |
141 | length -= 2; | |
142 | } | |
143 | while (length > 8) { | |
f7777378 | 144 | register unsigned int tmp asm("r2"), tmp2 asm("r3"), tmp3; |
d814dee0 | 145 | asm volatile( |
1da177e4 | 146 | "ldr%?h %2, [%0], #4\n\t" |
f7777378 | 147 | "ldr%?h %4, [%0], #4\n\t" |
1da177e4 | 148 | "ldr%?h %3, [%0], #4\n\t" |
f7777378 | 149 | "orr%? %2, %2, %4, lsl #16\n\t" |
1da177e4 LT |
150 | "ldr%?h %4, [%0], #4\n\t" |
151 | "orr%? %3, %3, %4, lsl #16\n\t" | |
152 | "stm%?ia %1!, {%2, %3}" | |
153 | : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2), "=r" (tmp3) | |
154 | : "0" (offset), "1" (buf)); | |
155 | length -= 8; | |
156 | } | |
157 | while (length > 0) { | |
158 | unsigned int tmp; | |
d814dee0 | 159 | asm volatile( |
1da177e4 LT |
160 | "ldr%?h %2, [%0], #4\n\t" |
161 | "str%?b %2, [%1], #1\n\t" | |
162 | "mov%? %2, %2, lsr #8\n\t" | |
163 | "str%?b %2, [%1], #1" | |
164 | : "=&r" (offset), "=&r" (buf), "=r" (tmp) : "0" (offset), "1" (buf)); | |
165 | length -= 2; | |
166 | } | |
167 | } | |
168 | #else | |
169 | #error Not compatible | |
170 | #endif | |
171 | ||
172 | static int | |
173 | am79c961_ramtest(struct net_device *dev, unsigned int val) | |
174 | { | |
175 | unsigned char *buffer = kmalloc (65536, GFP_KERNEL); | |
176 | int i, error = 0, errorcount = 0; | |
177 | ||
178 | if (!buffer) | |
179 | return 0; | |
180 | memset (buffer, val, 65536); | |
181 | am_writebuffer(dev, 0, buffer, 65536); | |
182 | memset (buffer, val ^ 255, 65536); | |
183 | am_readbuffer(dev, 0, buffer, 65536); | |
184 | for (i = 0; i < 65536; i++) { | |
185 | if (buffer[i] != val && !error) { | |
186 | printk ("%s: buffer error (%02X %02X) %05X - ", dev->name, val, buffer[i], i); | |
187 | error = 1; | |
188 | errorcount ++; | |
189 | } else if (error && buffer[i] == val) { | |
190 | printk ("%05X\n", i); | |
191 | error = 0; | |
192 | } | |
193 | } | |
194 | if (error) | |
195 | printk ("10000\n"); | |
196 | kfree (buffer); | |
197 | return errorcount; | |
198 | } | |
199 | ||
bfc65013 RKAL |
200 | static void am79c961_mc_hash(char *addr, u16 *hash) |
201 | { | |
bda7ed47 TK |
202 | int idx, bit; |
203 | u32 crc; | |
bfc65013 | 204 | |
bda7ed47 | 205 | crc = ether_crc_le(ETH_ALEN, addr); |
bfc65013 | 206 | |
bda7ed47 TK |
207 | idx = crc >> 30; |
208 | bit = (crc >> 26) & 15; | |
bfc65013 | 209 | |
bda7ed47 | 210 | hash[idx] |= 1 << bit; |
bfc65013 RKAL |
211 | } |
212 | ||
213 | static unsigned int am79c961_get_rx_mode(struct net_device *dev, u16 *hash) | |
214 | { | |
215 | unsigned int mode = MODE_PORT_10BT; | |
216 | ||
217 | if (dev->flags & IFF_PROMISC) { | |
218 | mode |= MODE_PROMISC; | |
219 | memset(hash, 0xff, 4 * sizeof(*hash)); | |
220 | } else if (dev->flags & IFF_ALLMULTI) { | |
221 | memset(hash, 0xff, 4 * sizeof(*hash)); | |
222 | } else { | |
223 | struct netdev_hw_addr *ha; | |
224 | ||
225 | memset(hash, 0, 4 * sizeof(*hash)); | |
226 | ||
227 | netdev_for_each_mc_addr(ha, dev) | |
228 | am79c961_mc_hash(ha->addr, hash); | |
229 | } | |
230 | ||
231 | return mode; | |
232 | } | |
233 | ||
1da177e4 LT |
234 | static void |
235 | am79c961_init_for_open(struct net_device *dev) | |
236 | { | |
237 | struct dev_priv *priv = netdev_priv(dev); | |
238 | unsigned long flags; | |
239 | unsigned char *p; | |
240 | u_int hdr_addr, first_free_addr; | |
bfc65013 | 241 | u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash); |
1da177e4 LT |
242 | int i; |
243 | ||
244 | /* | |
245 | * Stop the chip. | |
246 | */ | |
fb22d727 | 247 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 | 248 | write_rreg (dev->base_addr, CSR0, CSR0_BABL|CSR0_CERR|CSR0_MISS|CSR0_MERR|CSR0_TINT|CSR0_RINT|CSR0_STOP); |
fb22d727 | 249 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 LT |
250 | |
251 | write_ireg (dev->base_addr, 5, 0x00a0); /* Receive address LED */ | |
252 | write_ireg (dev->base_addr, 6, 0x0081); /* Collision LED */ | |
253 | write_ireg (dev->base_addr, 7, 0x0090); /* XMIT LED */ | |
254 | write_ireg (dev->base_addr, 2, 0x0000); /* MODE register selects media */ | |
255 | ||
256 | for (i = LADRL; i <= LADRH; i++) | |
bfc65013 | 257 | write_rreg (dev->base_addr, i, multi_hash[i - LADRL]); |
1da177e4 LT |
258 | |
259 | for (i = PADRL, p = dev->dev_addr; i <= PADRH; i++, p += 2) | |
260 | write_rreg (dev->base_addr, i, p[0] | (p[1] << 8)); | |
261 | ||
bfc65013 | 262 | write_rreg (dev->base_addr, MODE, mode); |
1da177e4 LT |
263 | write_rreg (dev->base_addr, POLLINT, 0); |
264 | write_rreg (dev->base_addr, SIZERXR, -RX_BUFFERS); | |
265 | write_rreg (dev->base_addr, SIZETXR, -TX_BUFFERS); | |
266 | ||
267 | first_free_addr = RX_BUFFERS * 8 + TX_BUFFERS * 8 + 16; | |
268 | hdr_addr = 0; | |
269 | ||
270 | priv->rxhead = 0; | |
271 | priv->rxtail = 0; | |
272 | priv->rxhdr = hdr_addr; | |
273 | ||
274 | for (i = 0; i < RX_BUFFERS; i++) { | |
275 | priv->rxbuffer[i] = first_free_addr; | |
276 | am_writeword (dev, hdr_addr, first_free_addr); | |
277 | am_writeword (dev, hdr_addr + 2, RMD_OWN); | |
278 | am_writeword (dev, hdr_addr + 4, (-1600)); | |
279 | am_writeword (dev, hdr_addr + 6, 0); | |
280 | first_free_addr += 1600; | |
281 | hdr_addr += 8; | |
282 | } | |
283 | priv->txhead = 0; | |
284 | priv->txtail = 0; | |
285 | priv->txhdr = hdr_addr; | |
286 | for (i = 0; i < TX_BUFFERS; i++) { | |
287 | priv->txbuffer[i] = first_free_addr; | |
288 | am_writeword (dev, hdr_addr, first_free_addr); | |
289 | am_writeword (dev, hdr_addr + 2, TMD_STP|TMD_ENP); | |
290 | am_writeword (dev, hdr_addr + 4, 0xf000); | |
291 | am_writeword (dev, hdr_addr + 6, 0); | |
292 | first_free_addr += 1600; | |
293 | hdr_addr += 8; | |
294 | } | |
295 | ||
296 | write_rreg (dev->base_addr, BASERXL, priv->rxhdr); | |
297 | write_rreg (dev->base_addr, BASERXH, 0); | |
298 | write_rreg (dev->base_addr, BASETXL, priv->txhdr); | |
299 | write_rreg (dev->base_addr, BASERXH, 0); | |
300 | write_rreg (dev->base_addr, CSR0, CSR0_STOP); | |
301 | write_rreg (dev->base_addr, CSR3, CSR3_IDONM|CSR3_BABLM|CSR3_DXSUFLO); | |
302 | write_rreg (dev->base_addr, CSR4, CSR4_APAD_XMIT|CSR4_MFCOM|CSR4_RCVCCOM|CSR4_TXSTRTM|CSR4_JABM); | |
303 | write_rreg (dev->base_addr, CSR0, CSR0_IENA|CSR0_STRT); | |
304 | } | |
305 | ||
306 | static void am79c961_timer(unsigned long data) | |
307 | { | |
308 | struct net_device *dev = (struct net_device *)data; | |
309 | struct dev_priv *priv = netdev_priv(dev); | |
310 | unsigned int lnkstat, carrier; | |
1df726ef | 311 | unsigned long flags; |
1da177e4 | 312 | |
1df726ef | 313 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 | 314 | lnkstat = read_ireg(dev->base_addr, ISALED0) & ISALED0_LNKST; |
1df726ef | 315 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 LT |
316 | carrier = netif_carrier_ok(dev); |
317 | ||
37bb30e8 | 318 | if (lnkstat && !carrier) { |
1da177e4 | 319 | netif_carrier_on(dev); |
37bb30e8 RK |
320 | printk("%s: link up\n", dev->name); |
321 | } else if (!lnkstat && carrier) { | |
1da177e4 | 322 | netif_carrier_off(dev); |
37bb30e8 RK |
323 | printk("%s: link down\n", dev->name); |
324 | } | |
1da177e4 | 325 | |
487fd4eb | 326 | mod_timer(&priv->timer, jiffies + msecs_to_jiffies(500)); |
1da177e4 LT |
327 | } |
328 | ||
329 | /* | |
330 | * Open/initialize the board. | |
331 | */ | |
332 | static int | |
333 | am79c961_open(struct net_device *dev) | |
334 | { | |
335 | struct dev_priv *priv = netdev_priv(dev); | |
336 | int ret; | |
337 | ||
1da177e4 LT |
338 | ret = request_irq(dev->irq, am79c961_interrupt, 0, dev->name, dev); |
339 | if (ret) | |
340 | return ret; | |
341 | ||
342 | am79c961_init_for_open(dev); | |
343 | ||
344 | netif_carrier_off(dev); | |
345 | ||
346 | priv->timer.expires = jiffies; | |
347 | add_timer(&priv->timer); | |
348 | ||
349 | netif_start_queue(dev); | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | /* | |
355 | * The inverse routine to am79c961_open(). | |
356 | */ | |
357 | static int | |
358 | am79c961_close(struct net_device *dev) | |
359 | { | |
360 | struct dev_priv *priv = netdev_priv(dev); | |
361 | unsigned long flags; | |
362 | ||
363 | del_timer_sync(&priv->timer); | |
364 | ||
365 | netif_stop_queue(dev); | |
366 | netif_carrier_off(dev); | |
367 | ||
fb22d727 | 368 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 LT |
369 | write_rreg (dev->base_addr, CSR0, CSR0_STOP); |
370 | write_rreg (dev->base_addr, CSR3, CSR3_MASKALL); | |
fb22d727 | 371 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 LT |
372 | |
373 | free_irq (dev->irq, dev); | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
1da177e4 LT |
378 | /* |
379 | * Set or clear promiscuous/multicast mode filter for this adapter. | |
380 | */ | |
381 | static void am79c961_setmulticastlist (struct net_device *dev) | |
382 | { | |
383 | struct dev_priv *priv = netdev_priv(dev); | |
384 | unsigned long flags; | |
bfc65013 | 385 | u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash); |
1da177e4 LT |
386 | int i, stopped; |
387 | ||
fb22d727 | 388 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 LT |
389 | |
390 | stopped = read_rreg(dev->base_addr, CSR0) & CSR0_STOP; | |
391 | ||
392 | if (!stopped) { | |
393 | /* | |
394 | * Put the chip into suspend mode | |
395 | */ | |
396 | write_rreg(dev->base_addr, CTRL1, CTRL1_SPND); | |
397 | ||
398 | /* | |
399 | * Spin waiting for chip to report suspend mode | |
400 | */ | |
401 | while ((read_rreg(dev->base_addr, CTRL1) & CTRL1_SPND) == 0) { | |
fb22d727 | 402 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 | 403 | nop(); |
fb22d727 | 404 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 LT |
405 | } |
406 | } | |
407 | ||
408 | /* | |
409 | * Update the multicast hash table | |
410 | */ | |
ff8ac609 | 411 | for (i = 0; i < ARRAY_SIZE(multi_hash); i++) |
1da177e4 LT |
412 | write_rreg(dev->base_addr, i + LADRL, multi_hash[i]); |
413 | ||
414 | /* | |
415 | * Write the mode register | |
416 | */ | |
417 | write_rreg(dev->base_addr, MODE, mode); | |
418 | ||
419 | if (!stopped) { | |
420 | /* | |
421 | * Put the chip back into running mode | |
422 | */ | |
423 | write_rreg(dev->base_addr, CTRL1, 0); | |
424 | } | |
425 | ||
fb22d727 | 426 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 LT |
427 | } |
428 | ||
429 | static void am79c961_timeout(struct net_device *dev) | |
430 | { | |
431 | printk(KERN_WARNING "%s: transmit timed out, network cable problem?\n", | |
432 | dev->name); | |
433 | ||
434 | /* | |
435 | * ought to do some setup of the tx side here | |
436 | */ | |
437 | ||
438 | netif_wake_queue(dev); | |
439 | } | |
440 | ||
441 | /* | |
442 | * Transmit a packet | |
443 | */ | |
444 | static int | |
445 | am79c961_sendpacket(struct sk_buff *skb, struct net_device *dev) | |
446 | { | |
447 | struct dev_priv *priv = netdev_priv(dev); | |
448 | unsigned int hdraddr, bufaddr; | |
449 | unsigned int head; | |
450 | unsigned long flags; | |
451 | ||
452 | head = priv->txhead; | |
453 | hdraddr = priv->txhdr + (head << 3); | |
454 | bufaddr = priv->txbuffer[head]; | |
455 | head += 1; | |
456 | if (head >= TX_BUFFERS) | |
457 | head = 0; | |
458 | ||
459 | am_writebuffer (dev, bufaddr, skb->data, skb->len); | |
460 | am_writeword (dev, hdraddr + 4, -skb->len); | |
461 | am_writeword (dev, hdraddr + 2, TMD_OWN|TMD_STP|TMD_ENP); | |
462 | priv->txhead = head; | |
463 | ||
fb22d727 | 464 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 | 465 | write_rreg (dev->base_addr, CSR0, CSR0_TDMD|CSR0_IENA); |
fb22d727 | 466 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 LT |
467 | |
468 | /* | |
469 | * If the next packet is owned by the ethernet device, | |
470 | * then the tx ring is full and we can't add another | |
471 | * packet. | |
472 | */ | |
473 | if (am_readword(dev, priv->txhdr + (priv->txhead << 3) + 2) & TMD_OWN) | |
474 | netif_stop_queue(dev); | |
475 | ||
476 | dev_kfree_skb(skb); | |
477 | ||
6ed10654 | 478 | return NETDEV_TX_OK; |
1da177e4 LT |
479 | } |
480 | ||
481 | /* | |
482 | * If we have a good packet(s), get it/them out of the buffers. | |
483 | */ | |
484 | static void | |
485 | am79c961_rx(struct net_device *dev, struct dev_priv *priv) | |
486 | { | |
487 | do { | |
488 | struct sk_buff *skb; | |
489 | u_int hdraddr; | |
490 | u_int pktaddr; | |
491 | u_int status; | |
492 | int len; | |
493 | ||
494 | hdraddr = priv->rxhdr + (priv->rxtail << 3); | |
495 | pktaddr = priv->rxbuffer[priv->rxtail]; | |
496 | ||
497 | status = am_readword (dev, hdraddr + 2); | |
498 | if (status & RMD_OWN) /* do we own it? */ | |
499 | break; | |
500 | ||
501 | priv->rxtail ++; | |
502 | if (priv->rxtail >= RX_BUFFERS) | |
503 | priv->rxtail = 0; | |
504 | ||
505 | if ((status & (RMD_ERR|RMD_STP|RMD_ENP)) != (RMD_STP|RMD_ENP)) { | |
506 | am_writeword (dev, hdraddr + 2, RMD_OWN); | |
264fd77a | 507 | dev->stats.rx_errors++; |
1da177e4 LT |
508 | if (status & RMD_ERR) { |
509 | if (status & RMD_FRAM) | |
264fd77a | 510 | dev->stats.rx_frame_errors++; |
1da177e4 | 511 | if (status & RMD_CRC) |
264fd77a | 512 | dev->stats.rx_crc_errors++; |
1da177e4 | 513 | } else if (status & RMD_STP) |
264fd77a | 514 | dev->stats.rx_length_errors++; |
1da177e4 LT |
515 | continue; |
516 | } | |
517 | ||
518 | len = am_readword(dev, hdraddr + 6); | |
519 | skb = dev_alloc_skb(len + 2); | |
520 | ||
521 | if (skb) { | |
1da177e4 LT |
522 | skb_reserve(skb, 2); |
523 | ||
524 | am_readbuffer(dev, pktaddr, skb_put(skb, len), len); | |
525 | am_writeword(dev, hdraddr + 2, RMD_OWN); | |
526 | skb->protocol = eth_type_trans(skb, dev); | |
527 | netif_rx(skb); | |
264fd77a TK |
528 | dev->stats.rx_bytes += len; |
529 | dev->stats.rx_packets++; | |
1da177e4 LT |
530 | } else { |
531 | am_writeword (dev, hdraddr + 2, RMD_OWN); | |
532 | printk (KERN_WARNING "%s: memory squeeze, dropping packet.\n", dev->name); | |
264fd77a | 533 | dev->stats.rx_dropped++; |
1da177e4 LT |
534 | break; |
535 | } | |
536 | } while (1); | |
537 | } | |
538 | ||
539 | /* | |
540 | * Update stats for the transmitted packet | |
541 | */ | |
542 | static void | |
543 | am79c961_tx(struct net_device *dev, struct dev_priv *priv) | |
544 | { | |
545 | do { | |
546 | short len; | |
547 | u_int hdraddr; | |
548 | u_int status; | |
549 | ||
550 | hdraddr = priv->txhdr + (priv->txtail << 3); | |
551 | status = am_readword (dev, hdraddr + 2); | |
552 | if (status & TMD_OWN) | |
553 | break; | |
554 | ||
555 | priv->txtail ++; | |
556 | if (priv->txtail >= TX_BUFFERS) | |
557 | priv->txtail = 0; | |
558 | ||
559 | if (status & TMD_ERR) { | |
560 | u_int status2; | |
561 | ||
264fd77a | 562 | dev->stats.tx_errors++; |
1da177e4 LT |
563 | |
564 | status2 = am_readword (dev, hdraddr + 6); | |
565 | ||
566 | /* | |
567 | * Clear the error byte | |
568 | */ | |
569 | am_writeword (dev, hdraddr + 6, 0); | |
570 | ||
571 | if (status2 & TST_RTRY) | |
264fd77a | 572 | dev->stats.collisions += 16; |
1da177e4 | 573 | if (status2 & TST_LCOL) |
264fd77a | 574 | dev->stats.tx_window_errors++; |
1da177e4 | 575 | if (status2 & TST_LCAR) |
264fd77a | 576 | dev->stats.tx_carrier_errors++; |
1da177e4 | 577 | if (status2 & TST_UFLO) |
264fd77a | 578 | dev->stats.tx_fifo_errors++; |
1da177e4 LT |
579 | continue; |
580 | } | |
264fd77a | 581 | dev->stats.tx_packets++; |
1da177e4 | 582 | len = am_readword (dev, hdraddr + 4); |
264fd77a | 583 | dev->stats.tx_bytes += -len; |
1da177e4 LT |
584 | } while (priv->txtail != priv->txhead); |
585 | ||
586 | netif_wake_queue(dev); | |
587 | } | |
588 | ||
589 | static irqreturn_t | |
7d12e780 | 590 | am79c961_interrupt(int irq, void *dev_id) |
1da177e4 LT |
591 | { |
592 | struct net_device *dev = (struct net_device *)dev_id; | |
593 | struct dev_priv *priv = netdev_priv(dev); | |
594 | u_int status, n = 100; | |
595 | int handled = 0; | |
596 | ||
597 | do { | |
598 | status = read_rreg(dev->base_addr, CSR0); | |
599 | write_rreg(dev->base_addr, CSR0, status & | |
600 | (CSR0_IENA|CSR0_TINT|CSR0_RINT| | |
601 | CSR0_MERR|CSR0_MISS|CSR0_CERR|CSR0_BABL)); | |
602 | ||
603 | if (status & CSR0_RINT) { | |
604 | handled = 1; | |
605 | am79c961_rx(dev, priv); | |
606 | } | |
607 | if (status & CSR0_TINT) { | |
608 | handled = 1; | |
609 | am79c961_tx(dev, priv); | |
610 | } | |
611 | if (status & CSR0_MISS) { | |
612 | handled = 1; | |
264fd77a | 613 | dev->stats.rx_dropped++; |
1da177e4 LT |
614 | } |
615 | if (status & CSR0_CERR) { | |
616 | handled = 1; | |
617 | mod_timer(&priv->timer, jiffies); | |
618 | } | |
619 | } while (--n && status & (CSR0_RINT | CSR0_TINT)); | |
620 | ||
621 | return IRQ_RETVAL(handled); | |
622 | } | |
623 | ||
624 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
625 | static void am79c961_poll_controller(struct net_device *dev) | |
626 | { | |
627 | unsigned long flags; | |
628 | local_irq_save(flags); | |
0da2f0f1 | 629 | am79c961_interrupt(dev->irq, dev); |
1da177e4 LT |
630 | local_irq_restore(flags); |
631 | } | |
632 | #endif | |
633 | ||
634 | /* | |
635 | * Initialise the chip. Note that we always expect | |
636 | * to be entered with interrupts enabled. | |
637 | */ | |
638 | static int | |
639 | am79c961_hw_init(struct net_device *dev) | |
640 | { | |
641 | struct dev_priv *priv = netdev_priv(dev); | |
642 | ||
643 | spin_lock_irq(&priv->chip_lock); | |
644 | write_rreg (dev->base_addr, CSR0, CSR0_STOP); | |
645 | write_rreg (dev->base_addr, CSR3, CSR3_MASKALL); | |
646 | spin_unlock_irq(&priv->chip_lock); | |
647 | ||
648 | am79c961_ramtest(dev, 0x66); | |
649 | am79c961_ramtest(dev, 0x99); | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | static void __init am79c961_banner(void) | |
655 | { | |
656 | static unsigned version_printed; | |
657 | ||
658 | if (net_debug && version_printed++ == 0) | |
659 | printk(KERN_INFO "%s", version); | |
660 | } | |
fefbfb1e AB |
661 | static const struct net_device_ops am79c961_netdev_ops = { |
662 | .ndo_open = am79c961_open, | |
663 | .ndo_stop = am79c961_close, | |
664 | .ndo_start_xmit = am79c961_sendpacket, | |
afc4b13d | 665 | .ndo_set_rx_mode = am79c961_setmulticastlist, |
fefbfb1e AB |
666 | .ndo_tx_timeout = am79c961_timeout, |
667 | .ndo_validate_addr = eth_validate_addr, | |
668 | .ndo_change_mtu = eth_change_mtu, | |
669 | .ndo_set_mac_address = eth_mac_addr, | |
670 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
671 | .ndo_poll_controller = am79c961_poll_controller, | |
672 | #endif | |
673 | }; | |
1da177e4 | 674 | |
447d8c26 | 675 | static int __devinit am79c961_probe(struct platform_device *pdev) |
1da177e4 | 676 | { |
37bb30e8 | 677 | struct resource *res; |
1da177e4 LT |
678 | struct net_device *dev; |
679 | struct dev_priv *priv; | |
680 | int i, ret; | |
681 | ||
37bb30e8 RK |
682 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
683 | if (!res) | |
684 | return -ENODEV; | |
685 | ||
1da177e4 LT |
686 | dev = alloc_etherdev(sizeof(struct dev_priv)); |
687 | ret = -ENOMEM; | |
688 | if (!dev) | |
689 | goto out; | |
690 | ||
37bb30e8 RK |
691 | SET_NETDEV_DEV(dev, &pdev->dev); |
692 | ||
1da177e4 LT |
693 | priv = netdev_priv(dev); |
694 | ||
695 | /* | |
696 | * Fixed address and IRQ lines here. | |
697 | * The PNP initialisation should have been | |
698 | * done by the ether bootp loader. | |
699 | */ | |
37bb30e8 | 700 | dev->base_addr = res->start; |
62783679 | 701 | ret = platform_get_irq(pdev, 0); |
1da177e4 | 702 | |
62783679 RK |
703 | if (ret < 0) { |
704 | ret = -ENODEV; | |
48944738 | 705 | goto nodev; |
62783679 RK |
706 | } |
707 | dev->irq = ret; | |
708 | ||
709 | ret = -ENODEV; | |
1da177e4 LT |
710 | if (!request_region(dev->base_addr, 0x18, dev->name)) |
711 | goto nodev; | |
712 | ||
713 | /* | |
714 | * Reset the device. | |
715 | */ | |
716 | inb(dev->base_addr + NET_RESET); | |
717 | udelay(5); | |
718 | ||
719 | /* | |
720 | * Check the manufacturer part of the | |
721 | * ether address. | |
722 | */ | |
723 | if (inb(dev->base_addr) != 0x08 || | |
724 | inb(dev->base_addr + 2) != 0x00 || | |
725 | inb(dev->base_addr + 4) != 0x2b) | |
726 | goto release; | |
727 | ||
487fd4eb | 728 | for (i = 0; i < 6; i++) |
1da177e4 | 729 | dev->dev_addr[i] = inb(dev->base_addr + i * 2) & 0xff; |
1da177e4 | 730 | |
37bb30e8 RK |
731 | am79c961_banner(); |
732 | ||
1da177e4 LT |
733 | spin_lock_init(&priv->chip_lock); |
734 | init_timer(&priv->timer); | |
735 | priv->timer.data = (unsigned long)dev; | |
736 | priv->timer.function = am79c961_timer; | |
737 | ||
738 | if (am79c961_hw_init(dev)) | |
739 | goto release; | |
740 | ||
fefbfb1e | 741 | dev->netdev_ops = &am79c961_netdev_ops; |
1da177e4 LT |
742 | |
743 | ret = register_netdev(dev); | |
487fd4eb | 744 | if (ret == 0) { |
e174961c JB |
745 | printk(KERN_INFO "%s: ether address %pM\n", |
746 | dev->name, dev->dev_addr); | |
1da177e4 | 747 | return 0; |
487fd4eb | 748 | } |
1da177e4 LT |
749 | |
750 | release: | |
751 | release_region(dev->base_addr, 0x18); | |
752 | nodev: | |
753 | free_netdev(dev); | |
754 | out: | |
755 | return ret; | |
756 | } | |
757 | ||
50465d0d | 758 | static struct platform_driver am79c961_driver = { |
37bb30e8 | 759 | .probe = am79c961_probe, |
50465d0d RK |
760 | .driver = { |
761 | .name = "am79c961", | |
762 | }, | |
37bb30e8 RK |
763 | }; |
764 | ||
765 | static int __init am79c961_init(void) | |
766 | { | |
50465d0d | 767 | return platform_driver_register(&am79c961_driver); |
37bb30e8 RK |
768 | } |
769 | ||
1da177e4 | 770 | __initcall(am79c961_init); |