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Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 | 2 | /* |
3396c782 | 3 | * linux/drivers/net/ethernet/amd/am79c961a.c |
1da177e4 LT |
4 | * |
5 | * by Russell King <rmk@arm.linux.org.uk> 1995-2001. | |
6 | * | |
1da177e4 LT |
7 | * Derived from various things including skeleton.c |
8 | * | |
9 | * This is a special driver for the am79c961A Lance chip used in the | |
10 | * Intel (formally Digital Equipment Corp) EBSA110 platform. Please | |
11 | * note that this can not be built as a module (it doesn't make sense). | |
12 | */ | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/types.h> | |
1da177e4 LT |
15 | #include <linux/interrupt.h> |
16 | #include <linux/ioport.h> | |
1da177e4 LT |
17 | #include <linux/slab.h> |
18 | #include <linux/string.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/netdevice.h> | |
21 | #include <linux/etherdevice.h> | |
1da177e4 LT |
22 | #include <linux/delay.h> |
23 | #include <linux/init.h> | |
24 | #include <linux/crc32.h> | |
25 | #include <linux/bitops.h> | |
37bb30e8 | 26 | #include <linux/platform_device.h> |
99730225 | 27 | #include <linux/io.h> |
1da177e4 | 28 | |
a09e64fb | 29 | #include <mach/hardware.h> |
1da177e4 LT |
30 | |
31 | #define TX_BUFFERS 15 | |
32 | #define RX_BUFFERS 25 | |
33 | ||
34 | #include "am79c961a.h" | |
35 | ||
36 | static irqreturn_t | |
7d12e780 | 37 | am79c961_interrupt (int irq, void *dev_id); |
1da177e4 LT |
38 | |
39 | static unsigned int net_debug = NET_DEBUG; | |
40 | ||
41 | static const char version[] = | |
42 | "am79c961 ethernet driver (C) 1995-2001 Russell King v0.04\n"; | |
43 | ||
44 | /* --------------------------------------------------------------------------- */ | |
45 | ||
46 | #ifdef __arm__ | |
47 | static void write_rreg(u_long base, u_int reg, u_int val) | |
48 | { | |
d814dee0 | 49 | asm volatile( |
a5a23ad5 AB |
50 | "strh %1, [%2] @ NET_RAP\n\t" |
51 | "strh %0, [%2, #-4] @ NET_RDP" | |
1da177e4 LT |
52 | : |
53 | : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464)); | |
54 | } | |
55 | ||
56 | static inline unsigned short read_rreg(u_long base_addr, u_int reg) | |
57 | { | |
58 | unsigned short v; | |
d814dee0 | 59 | asm volatile( |
a5a23ad5 AB |
60 | "strh %1, [%2] @ NET_RAP\n\t" |
61 | "ldrh %0, [%2, #-4] @ NET_RDP" | |
1da177e4 LT |
62 | : "=r" (v) |
63 | : "r" (reg), "r" (ISAIO_BASE + 0x0464)); | |
64 | return v; | |
65 | } | |
66 | ||
67 | static inline void write_ireg(u_long base, u_int reg, u_int val) | |
68 | { | |
d814dee0 | 69 | asm volatile( |
a5a23ad5 AB |
70 | "strh %1, [%2] @ NET_RAP\n\t" |
71 | "strh %0, [%2, #8] @ NET_IDP" | |
1da177e4 LT |
72 | : |
73 | : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464)); | |
74 | } | |
75 | ||
76 | static inline unsigned short read_ireg(u_long base_addr, u_int reg) | |
77 | { | |
78 | u_short v; | |
d814dee0 | 79 | asm volatile( |
a5a23ad5 AB |
80 | "strh %1, [%2] @ NAT_RAP\n\t" |
81 | "ldrh %0, [%2, #8] @ NET_IDP\n\t" | |
1da177e4 LT |
82 | : "=r" (v) |
83 | : "r" (reg), "r" (ISAIO_BASE + 0x0464)); | |
84 | return v; | |
85 | } | |
86 | ||
87 | #define am_writeword(dev,off,val) __raw_writew(val, ISAMEM_BASE + ((off) << 1)) | |
88 | #define am_readword(dev,off) __raw_readw(ISAMEM_BASE + ((off) << 1)) | |
89 | ||
f7777378 | 90 | static void |
1da177e4 LT |
91 | am_writebuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length) |
92 | { | |
93 | offset = ISAMEM_BASE + (offset << 1); | |
94 | length = (length + 1) & ~1; | |
95 | if ((int)buf & 2) { | |
a5a23ad5 | 96 | asm volatile("strh %2, [%0], #4" |
1da177e4 LT |
97 | : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8))); |
98 | buf += 2; | |
99 | length -= 2; | |
100 | } | |
101 | while (length > 8) { | |
f7777378 RKAL |
102 | register unsigned int tmp asm("r2"), tmp2 asm("r3"); |
103 | asm volatile( | |
a5a23ad5 | 104 | "ldmia %0!, {%1, %2}" |
f7777378 RKAL |
105 | : "+r" (buf), "=&r" (tmp), "=&r" (tmp2)); |
106 | length -= 8; | |
107 | asm volatile( | |
a5a23ad5 AB |
108 | "strh %1, [%0], #4\n\t" |
109 | "mov %1, %1, lsr #16\n\t" | |
110 | "strh %1, [%0], #4\n\t" | |
111 | "strh %2, [%0], #4\n\t" | |
112 | "mov %2, %2, lsr #16\n\t" | |
113 | "strh %2, [%0], #4" | |
f7777378 | 114 | : "+r" (offset), "=&r" (tmp), "=&r" (tmp2)); |
1da177e4 LT |
115 | } |
116 | while (length > 0) { | |
a5a23ad5 | 117 | asm volatile("strh %2, [%0], #4" |
1da177e4 LT |
118 | : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8))); |
119 | buf += 2; | |
120 | length -= 2; | |
121 | } | |
122 | } | |
123 | ||
f7777378 | 124 | static void |
1da177e4 LT |
125 | am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length) |
126 | { | |
127 | offset = ISAMEM_BASE + (offset << 1); | |
128 | length = (length + 1) & ~1; | |
129 | if ((int)buf & 2) { | |
130 | unsigned int tmp; | |
d814dee0 | 131 | asm volatile( |
a5a23ad5 AB |
132 | "ldrh %2, [%0], #4\n\t" |
133 | "strb %2, [%1], #1\n\t" | |
134 | "mov %2, %2, lsr #8\n\t" | |
135 | "strb %2, [%1], #1" | |
1da177e4 LT |
136 | : "=&r" (offset), "=&r" (buf), "=r" (tmp): "0" (offset), "1" (buf)); |
137 | length -= 2; | |
138 | } | |
139 | while (length > 8) { | |
f7777378 | 140 | register unsigned int tmp asm("r2"), tmp2 asm("r3"), tmp3; |
d814dee0 | 141 | asm volatile( |
a5a23ad5 AB |
142 | "ldrh %2, [%0], #4\n\t" |
143 | "ldrh %4, [%0], #4\n\t" | |
144 | "ldrh %3, [%0], #4\n\t" | |
145 | "orr %2, %2, %4, lsl #16\n\t" | |
146 | "ldrh %4, [%0], #4\n\t" | |
147 | "orr %3, %3, %4, lsl #16\n\t" | |
148 | "stmia %1!, {%2, %3}" | |
1da177e4 LT |
149 | : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2), "=r" (tmp3) |
150 | : "0" (offset), "1" (buf)); | |
151 | length -= 8; | |
152 | } | |
153 | while (length > 0) { | |
154 | unsigned int tmp; | |
d814dee0 | 155 | asm volatile( |
a5a23ad5 AB |
156 | "ldrh %2, [%0], #4\n\t" |
157 | "strb %2, [%1], #1\n\t" | |
158 | "mov %2, %2, lsr #8\n\t" | |
159 | "strb %2, [%1], #1" | |
1da177e4 LT |
160 | : "=&r" (offset), "=&r" (buf), "=r" (tmp) : "0" (offset), "1" (buf)); |
161 | length -= 2; | |
162 | } | |
163 | } | |
164 | #else | |
165 | #error Not compatible | |
166 | #endif | |
167 | ||
168 | static int | |
169 | am79c961_ramtest(struct net_device *dev, unsigned int val) | |
170 | { | |
171 | unsigned char *buffer = kmalloc (65536, GFP_KERNEL); | |
172 | int i, error = 0, errorcount = 0; | |
173 | ||
174 | if (!buffer) | |
175 | return 0; | |
176 | memset (buffer, val, 65536); | |
177 | am_writebuffer(dev, 0, buffer, 65536); | |
178 | memset (buffer, val ^ 255, 65536); | |
179 | am_readbuffer(dev, 0, buffer, 65536); | |
180 | for (i = 0; i < 65536; i++) { | |
181 | if (buffer[i] != val && !error) { | |
182 | printk ("%s: buffer error (%02X %02X) %05X - ", dev->name, val, buffer[i], i); | |
183 | error = 1; | |
184 | errorcount ++; | |
185 | } else if (error && buffer[i] == val) { | |
186 | printk ("%05X\n", i); | |
187 | error = 0; | |
188 | } | |
189 | } | |
190 | if (error) | |
191 | printk ("10000\n"); | |
192 | kfree (buffer); | |
193 | return errorcount; | |
194 | } | |
195 | ||
bfc65013 RKAL |
196 | static void am79c961_mc_hash(char *addr, u16 *hash) |
197 | { | |
bda7ed47 TK |
198 | int idx, bit; |
199 | u32 crc; | |
bfc65013 | 200 | |
bda7ed47 | 201 | crc = ether_crc_le(ETH_ALEN, addr); |
bfc65013 | 202 | |
bda7ed47 TK |
203 | idx = crc >> 30; |
204 | bit = (crc >> 26) & 15; | |
bfc65013 | 205 | |
bda7ed47 | 206 | hash[idx] |= 1 << bit; |
bfc65013 RKAL |
207 | } |
208 | ||
209 | static unsigned int am79c961_get_rx_mode(struct net_device *dev, u16 *hash) | |
210 | { | |
211 | unsigned int mode = MODE_PORT_10BT; | |
212 | ||
213 | if (dev->flags & IFF_PROMISC) { | |
214 | mode |= MODE_PROMISC; | |
215 | memset(hash, 0xff, 4 * sizeof(*hash)); | |
216 | } else if (dev->flags & IFF_ALLMULTI) { | |
217 | memset(hash, 0xff, 4 * sizeof(*hash)); | |
218 | } else { | |
219 | struct netdev_hw_addr *ha; | |
220 | ||
221 | memset(hash, 0, 4 * sizeof(*hash)); | |
222 | ||
223 | netdev_for_each_mc_addr(ha, dev) | |
224 | am79c961_mc_hash(ha->addr, hash); | |
225 | } | |
226 | ||
227 | return mode; | |
228 | } | |
229 | ||
1da177e4 LT |
230 | static void |
231 | am79c961_init_for_open(struct net_device *dev) | |
232 | { | |
233 | struct dev_priv *priv = netdev_priv(dev); | |
234 | unsigned long flags; | |
235 | unsigned char *p; | |
236 | u_int hdr_addr, first_free_addr; | |
bfc65013 | 237 | u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash); |
1da177e4 LT |
238 | int i; |
239 | ||
240 | /* | |
241 | * Stop the chip. | |
242 | */ | |
fb22d727 | 243 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 | 244 | write_rreg (dev->base_addr, CSR0, CSR0_BABL|CSR0_CERR|CSR0_MISS|CSR0_MERR|CSR0_TINT|CSR0_RINT|CSR0_STOP); |
fb22d727 | 245 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 LT |
246 | |
247 | write_ireg (dev->base_addr, 5, 0x00a0); /* Receive address LED */ | |
248 | write_ireg (dev->base_addr, 6, 0x0081); /* Collision LED */ | |
249 | write_ireg (dev->base_addr, 7, 0x0090); /* XMIT LED */ | |
250 | write_ireg (dev->base_addr, 2, 0x0000); /* MODE register selects media */ | |
251 | ||
252 | for (i = LADRL; i <= LADRH; i++) | |
bfc65013 | 253 | write_rreg (dev->base_addr, i, multi_hash[i - LADRL]); |
1da177e4 LT |
254 | |
255 | for (i = PADRL, p = dev->dev_addr; i <= PADRH; i++, p += 2) | |
256 | write_rreg (dev->base_addr, i, p[0] | (p[1] << 8)); | |
257 | ||
bfc65013 | 258 | write_rreg (dev->base_addr, MODE, mode); |
1da177e4 LT |
259 | write_rreg (dev->base_addr, POLLINT, 0); |
260 | write_rreg (dev->base_addr, SIZERXR, -RX_BUFFERS); | |
261 | write_rreg (dev->base_addr, SIZETXR, -TX_BUFFERS); | |
262 | ||
263 | first_free_addr = RX_BUFFERS * 8 + TX_BUFFERS * 8 + 16; | |
264 | hdr_addr = 0; | |
265 | ||
266 | priv->rxhead = 0; | |
267 | priv->rxtail = 0; | |
268 | priv->rxhdr = hdr_addr; | |
269 | ||
270 | for (i = 0; i < RX_BUFFERS; i++) { | |
271 | priv->rxbuffer[i] = first_free_addr; | |
272 | am_writeword (dev, hdr_addr, first_free_addr); | |
273 | am_writeword (dev, hdr_addr + 2, RMD_OWN); | |
274 | am_writeword (dev, hdr_addr + 4, (-1600)); | |
275 | am_writeword (dev, hdr_addr + 6, 0); | |
276 | first_free_addr += 1600; | |
277 | hdr_addr += 8; | |
278 | } | |
279 | priv->txhead = 0; | |
280 | priv->txtail = 0; | |
281 | priv->txhdr = hdr_addr; | |
282 | for (i = 0; i < TX_BUFFERS; i++) { | |
283 | priv->txbuffer[i] = first_free_addr; | |
284 | am_writeword (dev, hdr_addr, first_free_addr); | |
285 | am_writeword (dev, hdr_addr + 2, TMD_STP|TMD_ENP); | |
286 | am_writeword (dev, hdr_addr + 4, 0xf000); | |
287 | am_writeword (dev, hdr_addr + 6, 0); | |
288 | first_free_addr += 1600; | |
289 | hdr_addr += 8; | |
290 | } | |
291 | ||
292 | write_rreg (dev->base_addr, BASERXL, priv->rxhdr); | |
293 | write_rreg (dev->base_addr, BASERXH, 0); | |
294 | write_rreg (dev->base_addr, BASETXL, priv->txhdr); | |
295 | write_rreg (dev->base_addr, BASERXH, 0); | |
296 | write_rreg (dev->base_addr, CSR0, CSR0_STOP); | |
297 | write_rreg (dev->base_addr, CSR3, CSR3_IDONM|CSR3_BABLM|CSR3_DXSUFLO); | |
298 | write_rreg (dev->base_addr, CSR4, CSR4_APAD_XMIT|CSR4_MFCOM|CSR4_RCVCCOM|CSR4_TXSTRTM|CSR4_JABM); | |
299 | write_rreg (dev->base_addr, CSR0, CSR0_IENA|CSR0_STRT); | |
300 | } | |
301 | ||
c6c52ba1 | 302 | static void am79c961_timer(struct timer_list *t) |
1da177e4 | 303 | { |
c6c52ba1 KC |
304 | struct dev_priv *priv = from_timer(priv, t, timer); |
305 | struct net_device *dev = priv->dev; | |
1da177e4 | 306 | unsigned int lnkstat, carrier; |
1df726ef | 307 | unsigned long flags; |
1da177e4 | 308 | |
1df726ef | 309 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 | 310 | lnkstat = read_ireg(dev->base_addr, ISALED0) & ISALED0_LNKST; |
1df726ef | 311 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 LT |
312 | carrier = netif_carrier_ok(dev); |
313 | ||
37bb30e8 | 314 | if (lnkstat && !carrier) { |
1da177e4 | 315 | netif_carrier_on(dev); |
37bb30e8 RK |
316 | printk("%s: link up\n", dev->name); |
317 | } else if (!lnkstat && carrier) { | |
1da177e4 | 318 | netif_carrier_off(dev); |
37bb30e8 RK |
319 | printk("%s: link down\n", dev->name); |
320 | } | |
1da177e4 | 321 | |
487fd4eb | 322 | mod_timer(&priv->timer, jiffies + msecs_to_jiffies(500)); |
1da177e4 LT |
323 | } |
324 | ||
325 | /* | |
326 | * Open/initialize the board. | |
327 | */ | |
328 | static int | |
329 | am79c961_open(struct net_device *dev) | |
330 | { | |
331 | struct dev_priv *priv = netdev_priv(dev); | |
332 | int ret; | |
333 | ||
1da177e4 LT |
334 | ret = request_irq(dev->irq, am79c961_interrupt, 0, dev->name, dev); |
335 | if (ret) | |
336 | return ret; | |
337 | ||
338 | am79c961_init_for_open(dev); | |
339 | ||
340 | netif_carrier_off(dev); | |
341 | ||
342 | priv->timer.expires = jiffies; | |
343 | add_timer(&priv->timer); | |
344 | ||
345 | netif_start_queue(dev); | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | /* | |
351 | * The inverse routine to am79c961_open(). | |
352 | */ | |
353 | static int | |
354 | am79c961_close(struct net_device *dev) | |
355 | { | |
356 | struct dev_priv *priv = netdev_priv(dev); | |
357 | unsigned long flags; | |
358 | ||
359 | del_timer_sync(&priv->timer); | |
360 | ||
361 | netif_stop_queue(dev); | |
362 | netif_carrier_off(dev); | |
363 | ||
fb22d727 | 364 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 LT |
365 | write_rreg (dev->base_addr, CSR0, CSR0_STOP); |
366 | write_rreg (dev->base_addr, CSR3, CSR3_MASKALL); | |
fb22d727 | 367 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 LT |
368 | |
369 | free_irq (dev->irq, dev); | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
1da177e4 LT |
374 | /* |
375 | * Set or clear promiscuous/multicast mode filter for this adapter. | |
376 | */ | |
377 | static void am79c961_setmulticastlist (struct net_device *dev) | |
378 | { | |
379 | struct dev_priv *priv = netdev_priv(dev); | |
380 | unsigned long flags; | |
bfc65013 | 381 | u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash); |
1da177e4 LT |
382 | int i, stopped; |
383 | ||
fb22d727 | 384 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 LT |
385 | |
386 | stopped = read_rreg(dev->base_addr, CSR0) & CSR0_STOP; | |
387 | ||
388 | if (!stopped) { | |
389 | /* | |
390 | * Put the chip into suspend mode | |
391 | */ | |
392 | write_rreg(dev->base_addr, CTRL1, CTRL1_SPND); | |
393 | ||
394 | /* | |
395 | * Spin waiting for chip to report suspend mode | |
396 | */ | |
397 | while ((read_rreg(dev->base_addr, CTRL1) & CTRL1_SPND) == 0) { | |
fb22d727 | 398 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 | 399 | nop(); |
fb22d727 | 400 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 LT |
401 | } |
402 | } | |
403 | ||
404 | /* | |
405 | * Update the multicast hash table | |
406 | */ | |
ff8ac609 | 407 | for (i = 0; i < ARRAY_SIZE(multi_hash); i++) |
1da177e4 LT |
408 | write_rreg(dev->base_addr, i + LADRL, multi_hash[i]); |
409 | ||
410 | /* | |
411 | * Write the mode register | |
412 | */ | |
413 | write_rreg(dev->base_addr, MODE, mode); | |
414 | ||
415 | if (!stopped) { | |
416 | /* | |
417 | * Put the chip back into running mode | |
418 | */ | |
419 | write_rreg(dev->base_addr, CTRL1, 0); | |
420 | } | |
421 | ||
fb22d727 | 422 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 LT |
423 | } |
424 | ||
425 | static void am79c961_timeout(struct net_device *dev) | |
426 | { | |
427 | printk(KERN_WARNING "%s: transmit timed out, network cable problem?\n", | |
428 | dev->name); | |
429 | ||
430 | /* | |
431 | * ought to do some setup of the tx side here | |
432 | */ | |
433 | ||
434 | netif_wake_queue(dev); | |
435 | } | |
436 | ||
437 | /* | |
438 | * Transmit a packet | |
439 | */ | |
fe72352e | 440 | static netdev_tx_t |
1da177e4 LT |
441 | am79c961_sendpacket(struct sk_buff *skb, struct net_device *dev) |
442 | { | |
443 | struct dev_priv *priv = netdev_priv(dev); | |
444 | unsigned int hdraddr, bufaddr; | |
445 | unsigned int head; | |
446 | unsigned long flags; | |
447 | ||
448 | head = priv->txhead; | |
449 | hdraddr = priv->txhdr + (head << 3); | |
450 | bufaddr = priv->txbuffer[head]; | |
451 | head += 1; | |
452 | if (head >= TX_BUFFERS) | |
453 | head = 0; | |
454 | ||
455 | am_writebuffer (dev, bufaddr, skb->data, skb->len); | |
456 | am_writeword (dev, hdraddr + 4, -skb->len); | |
457 | am_writeword (dev, hdraddr + 2, TMD_OWN|TMD_STP|TMD_ENP); | |
458 | priv->txhead = head; | |
459 | ||
fb22d727 | 460 | spin_lock_irqsave(&priv->chip_lock, flags); |
1da177e4 | 461 | write_rreg (dev->base_addr, CSR0, CSR0_TDMD|CSR0_IENA); |
fb22d727 | 462 | spin_unlock_irqrestore(&priv->chip_lock, flags); |
1da177e4 LT |
463 | |
464 | /* | |
465 | * If the next packet is owned by the ethernet device, | |
466 | * then the tx ring is full and we can't add another | |
467 | * packet. | |
468 | */ | |
469 | if (am_readword(dev, priv->txhdr + (priv->txhead << 3) + 2) & TMD_OWN) | |
470 | netif_stop_queue(dev); | |
471 | ||
e21106b4 | 472 | dev_consume_skb_any(skb); |
1da177e4 | 473 | |
6ed10654 | 474 | return NETDEV_TX_OK; |
1da177e4 LT |
475 | } |
476 | ||
477 | /* | |
478 | * If we have a good packet(s), get it/them out of the buffers. | |
479 | */ | |
480 | static void | |
481 | am79c961_rx(struct net_device *dev, struct dev_priv *priv) | |
482 | { | |
483 | do { | |
484 | struct sk_buff *skb; | |
485 | u_int hdraddr; | |
486 | u_int pktaddr; | |
487 | u_int status; | |
488 | int len; | |
489 | ||
490 | hdraddr = priv->rxhdr + (priv->rxtail << 3); | |
491 | pktaddr = priv->rxbuffer[priv->rxtail]; | |
492 | ||
493 | status = am_readword (dev, hdraddr + 2); | |
494 | if (status & RMD_OWN) /* do we own it? */ | |
495 | break; | |
496 | ||
497 | priv->rxtail ++; | |
498 | if (priv->rxtail >= RX_BUFFERS) | |
499 | priv->rxtail = 0; | |
500 | ||
501 | if ((status & (RMD_ERR|RMD_STP|RMD_ENP)) != (RMD_STP|RMD_ENP)) { | |
502 | am_writeword (dev, hdraddr + 2, RMD_OWN); | |
264fd77a | 503 | dev->stats.rx_errors++; |
1da177e4 LT |
504 | if (status & RMD_ERR) { |
505 | if (status & RMD_FRAM) | |
264fd77a | 506 | dev->stats.rx_frame_errors++; |
1da177e4 | 507 | if (status & RMD_CRC) |
264fd77a | 508 | dev->stats.rx_crc_errors++; |
1da177e4 | 509 | } else if (status & RMD_STP) |
264fd77a | 510 | dev->stats.rx_length_errors++; |
1da177e4 LT |
511 | continue; |
512 | } | |
513 | ||
514 | len = am_readword(dev, hdraddr + 6); | |
1d266430 | 515 | skb = netdev_alloc_skb(dev, len + 2); |
1da177e4 LT |
516 | |
517 | if (skb) { | |
1da177e4 LT |
518 | skb_reserve(skb, 2); |
519 | ||
520 | am_readbuffer(dev, pktaddr, skb_put(skb, len), len); | |
521 | am_writeword(dev, hdraddr + 2, RMD_OWN); | |
522 | skb->protocol = eth_type_trans(skb, dev); | |
523 | netif_rx(skb); | |
264fd77a TK |
524 | dev->stats.rx_bytes += len; |
525 | dev->stats.rx_packets++; | |
1da177e4 LT |
526 | } else { |
527 | am_writeword (dev, hdraddr + 2, RMD_OWN); | |
264fd77a | 528 | dev->stats.rx_dropped++; |
1da177e4 LT |
529 | break; |
530 | } | |
531 | } while (1); | |
532 | } | |
533 | ||
534 | /* | |
535 | * Update stats for the transmitted packet | |
536 | */ | |
537 | static void | |
538 | am79c961_tx(struct net_device *dev, struct dev_priv *priv) | |
539 | { | |
540 | do { | |
541 | short len; | |
542 | u_int hdraddr; | |
543 | u_int status; | |
544 | ||
545 | hdraddr = priv->txhdr + (priv->txtail << 3); | |
546 | status = am_readword (dev, hdraddr + 2); | |
547 | if (status & TMD_OWN) | |
548 | break; | |
549 | ||
550 | priv->txtail ++; | |
551 | if (priv->txtail >= TX_BUFFERS) | |
552 | priv->txtail = 0; | |
553 | ||
554 | if (status & TMD_ERR) { | |
555 | u_int status2; | |
556 | ||
264fd77a | 557 | dev->stats.tx_errors++; |
1da177e4 LT |
558 | |
559 | status2 = am_readword (dev, hdraddr + 6); | |
560 | ||
561 | /* | |
562 | * Clear the error byte | |
563 | */ | |
564 | am_writeword (dev, hdraddr + 6, 0); | |
565 | ||
566 | if (status2 & TST_RTRY) | |
264fd77a | 567 | dev->stats.collisions += 16; |
1da177e4 | 568 | if (status2 & TST_LCOL) |
264fd77a | 569 | dev->stats.tx_window_errors++; |
1da177e4 | 570 | if (status2 & TST_LCAR) |
264fd77a | 571 | dev->stats.tx_carrier_errors++; |
1da177e4 | 572 | if (status2 & TST_UFLO) |
264fd77a | 573 | dev->stats.tx_fifo_errors++; |
1da177e4 LT |
574 | continue; |
575 | } | |
264fd77a | 576 | dev->stats.tx_packets++; |
1da177e4 | 577 | len = am_readword (dev, hdraddr + 4); |
264fd77a | 578 | dev->stats.tx_bytes += -len; |
1da177e4 LT |
579 | } while (priv->txtail != priv->txhead); |
580 | ||
581 | netif_wake_queue(dev); | |
582 | } | |
583 | ||
584 | static irqreturn_t | |
7d12e780 | 585 | am79c961_interrupt(int irq, void *dev_id) |
1da177e4 LT |
586 | { |
587 | struct net_device *dev = (struct net_device *)dev_id; | |
588 | struct dev_priv *priv = netdev_priv(dev); | |
589 | u_int status, n = 100; | |
590 | int handled = 0; | |
591 | ||
592 | do { | |
593 | status = read_rreg(dev->base_addr, CSR0); | |
594 | write_rreg(dev->base_addr, CSR0, status & | |
595 | (CSR0_IENA|CSR0_TINT|CSR0_RINT| | |
596 | CSR0_MERR|CSR0_MISS|CSR0_CERR|CSR0_BABL)); | |
597 | ||
598 | if (status & CSR0_RINT) { | |
599 | handled = 1; | |
600 | am79c961_rx(dev, priv); | |
601 | } | |
602 | if (status & CSR0_TINT) { | |
603 | handled = 1; | |
604 | am79c961_tx(dev, priv); | |
605 | } | |
606 | if (status & CSR0_MISS) { | |
607 | handled = 1; | |
264fd77a | 608 | dev->stats.rx_dropped++; |
1da177e4 LT |
609 | } |
610 | if (status & CSR0_CERR) { | |
611 | handled = 1; | |
612 | mod_timer(&priv->timer, jiffies); | |
613 | } | |
614 | } while (--n && status & (CSR0_RINT | CSR0_TINT)); | |
615 | ||
616 | return IRQ_RETVAL(handled); | |
617 | } | |
618 | ||
619 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
620 | static void am79c961_poll_controller(struct net_device *dev) | |
621 | { | |
622 | unsigned long flags; | |
623 | local_irq_save(flags); | |
0da2f0f1 | 624 | am79c961_interrupt(dev->irq, dev); |
1da177e4 LT |
625 | local_irq_restore(flags); |
626 | } | |
627 | #endif | |
628 | ||
629 | /* | |
630 | * Initialise the chip. Note that we always expect | |
631 | * to be entered with interrupts enabled. | |
632 | */ | |
633 | static int | |
634 | am79c961_hw_init(struct net_device *dev) | |
635 | { | |
636 | struct dev_priv *priv = netdev_priv(dev); | |
637 | ||
638 | spin_lock_irq(&priv->chip_lock); | |
639 | write_rreg (dev->base_addr, CSR0, CSR0_STOP); | |
640 | write_rreg (dev->base_addr, CSR3, CSR3_MASKALL); | |
641 | spin_unlock_irq(&priv->chip_lock); | |
642 | ||
643 | am79c961_ramtest(dev, 0x66); | |
644 | am79c961_ramtest(dev, 0x99); | |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
649 | static void __init am79c961_banner(void) | |
650 | { | |
651 | static unsigned version_printed; | |
652 | ||
653 | if (net_debug && version_printed++ == 0) | |
654 | printk(KERN_INFO "%s", version); | |
655 | } | |
fefbfb1e AB |
656 | static const struct net_device_ops am79c961_netdev_ops = { |
657 | .ndo_open = am79c961_open, | |
658 | .ndo_stop = am79c961_close, | |
659 | .ndo_start_xmit = am79c961_sendpacket, | |
afc4b13d | 660 | .ndo_set_rx_mode = am79c961_setmulticastlist, |
fefbfb1e AB |
661 | .ndo_tx_timeout = am79c961_timeout, |
662 | .ndo_validate_addr = eth_validate_addr, | |
fefbfb1e AB |
663 | .ndo_set_mac_address = eth_mac_addr, |
664 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
665 | .ndo_poll_controller = am79c961_poll_controller, | |
666 | #endif | |
667 | }; | |
1da177e4 | 668 | |
92a66593 | 669 | static int am79c961_probe(struct platform_device *pdev) |
1da177e4 | 670 | { |
37bb30e8 | 671 | struct resource *res; |
1da177e4 LT |
672 | struct net_device *dev; |
673 | struct dev_priv *priv; | |
674 | int i, ret; | |
675 | ||
37bb30e8 RK |
676 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
677 | if (!res) | |
678 | return -ENODEV; | |
679 | ||
1da177e4 LT |
680 | dev = alloc_etherdev(sizeof(struct dev_priv)); |
681 | ret = -ENOMEM; | |
682 | if (!dev) | |
683 | goto out; | |
684 | ||
37bb30e8 RK |
685 | SET_NETDEV_DEV(dev, &pdev->dev); |
686 | ||
1da177e4 LT |
687 | priv = netdev_priv(dev); |
688 | ||
689 | /* | |
690 | * Fixed address and IRQ lines here. | |
691 | * The PNP initialisation should have been | |
692 | * done by the ether bootp loader. | |
693 | */ | |
37bb30e8 | 694 | dev->base_addr = res->start; |
62783679 | 695 | ret = platform_get_irq(pdev, 0); |
1da177e4 | 696 | |
62783679 RK |
697 | if (ret < 0) { |
698 | ret = -ENODEV; | |
48944738 | 699 | goto nodev; |
62783679 RK |
700 | } |
701 | dev->irq = ret; | |
702 | ||
703 | ret = -ENODEV; | |
1da177e4 LT |
704 | if (!request_region(dev->base_addr, 0x18, dev->name)) |
705 | goto nodev; | |
706 | ||
707 | /* | |
708 | * Reset the device. | |
709 | */ | |
710 | inb(dev->base_addr + NET_RESET); | |
711 | udelay(5); | |
712 | ||
713 | /* | |
714 | * Check the manufacturer part of the | |
715 | * ether address. | |
716 | */ | |
717 | if (inb(dev->base_addr) != 0x08 || | |
718 | inb(dev->base_addr + 2) != 0x00 || | |
719 | inb(dev->base_addr + 4) != 0x2b) | |
720 | goto release; | |
721 | ||
487fd4eb | 722 | for (i = 0; i < 6; i++) |
1da177e4 | 723 | dev->dev_addr[i] = inb(dev->base_addr + i * 2) & 0xff; |
1da177e4 | 724 | |
37bb30e8 RK |
725 | am79c961_banner(); |
726 | ||
1da177e4 | 727 | spin_lock_init(&priv->chip_lock); |
c6c52ba1 KC |
728 | priv->dev = dev; |
729 | timer_setup(&priv->timer, am79c961_timer, 0); | |
1da177e4 LT |
730 | |
731 | if (am79c961_hw_init(dev)) | |
732 | goto release; | |
733 | ||
fefbfb1e | 734 | dev->netdev_ops = &am79c961_netdev_ops; |
1da177e4 LT |
735 | |
736 | ret = register_netdev(dev); | |
487fd4eb | 737 | if (ret == 0) { |
e174961c JB |
738 | printk(KERN_INFO "%s: ether address %pM\n", |
739 | dev->name, dev->dev_addr); | |
1da177e4 | 740 | return 0; |
487fd4eb | 741 | } |
1da177e4 LT |
742 | |
743 | release: | |
744 | release_region(dev->base_addr, 0x18); | |
745 | nodev: | |
746 | free_netdev(dev); | |
747 | out: | |
748 | return ret; | |
749 | } | |
750 | ||
50465d0d | 751 | static struct platform_driver am79c961_driver = { |
37bb30e8 | 752 | .probe = am79c961_probe, |
50465d0d RK |
753 | .driver = { |
754 | .name = "am79c961", | |
755 | }, | |
37bb30e8 RK |
756 | }; |
757 | ||
758 | static int __init am79c961_init(void) | |
759 | { | |
50465d0d | 760 | return platform_driver_register(&am79c961_driver); |
37bb30e8 RK |
761 | } |
762 | ||
1da177e4 | 763 | __initcall(am79c961_init); |