1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * linux/drivers/acorn/net/ether1.c |
4 | * |
5 | * Copyright (C) 1996-2000 Russell King |
6 | * |
7 | * Acorn ether1 driver (82586 chip) for Acorn machines |
8 | * |
9 | * We basically keep two queues in the cards memory - one for transmit |
10 | * and one for receive. Each has a head and a tail. The head is where |
11 | * we/the chip adds packets to be transmitted/received, and the tail |
12 | * is where the transmitter has got to/where the receiver will stop. |
13 | * Both of these queues are circular, and since the chip is running |
14 | * all the time, we have to be careful when we modify the pointers etc |
15 | * so that the buffer memory contents is valid all the time. |
16 | * |
17 | * Change log: |
18 | * 1.00 RMK Released |
19 | * 1.01 RMK 19/03/1996 Transfers the last odd byte onto/off of the card now. |
20 | * 1.02 RMK 25/05/1997 Added code to restart RU if it goes not ready |
21 | * 1.03 RMK 14/09/1997 Cleaned up the handling of a reset during the TX interrupt. |
22 | * Should prevent lockup. |
23 | * 1.04 RMK 17/09/1997 Added more info when initialisation of chip goes wrong. |
24 | * TDR now only reports failure when chip reports non-zero |
25 | * TDR time-distance. |
26 | * 1.05 RMK 31/12/1997 Removed calls to dev_tint for 2.1 |
27 | * 1.06 RMK 10/02/2000 Updated for 2.3.43 |
28 | * 1.07 RMK 13/05/2000 Updated for 2.3.99-pre8 |
29 | */ |
30 | |
31 | #include <linux/module.h> |
32 | #include <linux/kernel.h> |
33 | #include <linux/types.h> |
34 | #include <linux/fcntl.h> |
35 | #include <linux/interrupt.h> |
36 | #include <linux/ioport.h> |
37 | #include <linux/in.h> |
38 | #include <linux/slab.h> |
39 | #include <linux/string.h> |
40 | #include <linux/errno.h> |
41 | #include <linux/device.h> |
42 | #include <linux/init.h> |
43 | #include <linux/netdevice.h> |
44 | #include <linux/etherdevice.h> |
45 | #include <linux/skbuff.h> |
46 | #include <linux/bitops.h> |
47 | |
48 | #include <asm/io.h> |
49 | #include <asm/dma.h> |
50 | #include <asm/ecard.h> |
51 | |
52 | #define __ETHER1_C |
53 | #include "ether1.h" |
54 | |
55 | static unsigned int net_debug = NET_DEBUG; |
56 | |
57 | #define BUFFER_SIZE 0x10000 |
58 | #define TX_AREA_START 0x00100 |
59 | #define TX_AREA_END 0x05000 |
60 | #define RX_AREA_START 0x05000 |
61 | #define RX_AREA_END 0x0fc00 |
62 | |
63 | static int ether1_open(struct net_device *dev); |
64 | static netdev_tx_t ether1_sendpacket(struct sk_buff *skb, |
65 | struct net_device *dev); |
66 | static irqreturn_t ether1_interrupt(int irq, void *dev_id); |
67 | static int ether1_close(struct net_device *dev); |
68 | static void ether1_setmulticastlist(struct net_device *dev); |
69 | static void ether1_timeout(struct net_device *dev, unsigned int txqueue); |
70 | |
71 | /* ------------------------------------------------------------------------- */ |
72 | |
73 | static char version[] = "ether1 ethernet driver (c) 2000 Russell King v1.07\n" ; |
74 | |
75 | #define BUS_16 16 |
76 | #define BUS_8 8 |
77 | |
78 | /* ------------------------------------------------------------------------- */ |
79 | |
80 | #define DISABLEIRQS 1 |
81 | #define NORMALIRQS 0 |
82 | |
83 | #define ether1_readw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs) |
84 | #define ether1_writew(dev, val, addr, type, offset, svflgs) ether1_outw_p (dev, val, addr + (int)(&((type *)0)->offset), svflgs) |
85 | |
86 | static inline unsigned short |
87 | ether1_inw_p (struct net_device *dev, int addr, int svflgs) |
88 | { |
89 | unsigned long flags; |
90 | unsigned short ret; |
91 | |
92 | if (svflgs) |
93 | local_irq_save (flags); |
94 | |
95 | writeb(val: addr >> 12, REG_PAGE); |
96 | ret = readw(ETHER1_RAM + ((addr & 4095) << 1)); |
97 | if (svflgs) |
98 | local_irq_restore (flags); |
99 | return ret; |
100 | } |
101 | |
102 | static inline void |
103 | ether1_outw_p (struct net_device *dev, unsigned short val, int addr, int svflgs) |
104 | { |
105 | unsigned long flags; |
106 | |
107 | if (svflgs) |
108 | local_irq_save (flags); |
109 | |
110 | writeb(val: addr >> 12, REG_PAGE); |
111 | writew(val, ETHER1_RAM + ((addr & 4095) << 1)); |
112 | if (svflgs) |
113 | local_irq_restore (flags); |
114 | } |
115 | |
116 | /* |
117 | * Some inline assembler to allow fast transfers on to/off of the card. |
118 | * Since this driver depends on some features presented by the ARM |
119 | * specific architecture, and that you can't configure this driver |
120 | * without specifying ARM mode, this is not a problem. |
121 | * |
122 | * This routine is essentially an optimised memcpy from the card's |
123 | * onboard RAM to kernel memory. |
124 | */ |
125 | static void |
126 | ether1_writebuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length) |
127 | { |
128 | unsigned int page, thislen, offset; |
129 | void __iomem *addr; |
130 | |
131 | offset = start & 4095; |
132 | page = start >> 12; |
133 | addr = ETHER1_RAM + (offset << 1); |
134 | |
135 | if (offset + length > 4096) |
136 | thislen = 4096 - offset; |
137 | else |
138 | thislen = length; |
139 | |
140 | do { |
141 | int used; |
142 | |
143 | writeb(val: page, REG_PAGE); |
144 | length -= thislen; |
145 | |
146 | __asm__ __volatile__( |
147 | "subs %3, %3, #2\n\ |
148 | bmi 2f\n\ |
149 | 1: ldr %0, [%1], #2\n\ |
150 | mov %0, %0, lsl #16\n\ |
151 | orr %0, %0, %0, lsr #16\n\ |
152 | str %0, [%2], #4\n\ |
153 | subs %3, %3, #2\n\ |
154 | bmi 2f\n\ |
155 | ldr %0, [%1], #2\n\ |
156 | mov %0, %0, lsl #16\n\ |
157 | orr %0, %0, %0, lsr #16\n\ |
158 | str %0, [%2], #4\n\ |
159 | subs %3, %3, #2\n\ |
160 | bmi 2f\n\ |
161 | ldr %0, [%1], #2\n\ |
162 | mov %0, %0, lsl #16\n\ |
163 | orr %0, %0, %0, lsr #16\n\ |
164 | str %0, [%2], #4\n\ |
165 | subs %3, %3, #2\n\ |
166 | bmi 2f\n\ |
167 | ldr %0, [%1], #2\n\ |
168 | mov %0, %0, lsl #16\n\ |
169 | orr %0, %0, %0, lsr #16\n\ |
170 | str %0, [%2], #4\n\ |
171 | subs %3, %3, #2\n\ |
172 | bpl 1b\n\ |
173 | 2: adds %3, %3, #1\n\ |
174 | ldreqb %0, [%1]\n\ |
175 | streqb %0, [%2]" |
176 | : "=&r" (used), "=&r" (data) |
177 | : "r" (addr), "r" (thislen), "1" (data)); |
178 | |
179 | addr = ETHER1_RAM; |
180 | |
181 | thislen = length; |
182 | if (thislen > 4096) |
183 | thislen = 4096; |
184 | page++; |
185 | } while (thislen); |
186 | } |
187 | |
188 | static void |
189 | ether1_readbuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length) |
190 | { |
191 | unsigned int page, thislen, offset; |
192 | void __iomem *addr; |
193 | |
194 | offset = start & 4095; |
195 | page = start >> 12; |
196 | addr = ETHER1_RAM + (offset << 1); |
197 | |
198 | if (offset + length > 4096) |
199 | thislen = 4096 - offset; |
200 | else |
201 | thislen = length; |
202 | |
203 | do { |
204 | int used; |
205 | |
206 | writeb(val: page, REG_PAGE); |
207 | length -= thislen; |
208 | |
209 | __asm__ __volatile__( |
210 | "subs %3, %3, #2\n\ |
211 | bmi 2f\n\ |
212 | 1: ldr %0, [%2], #4\n\ |
213 | strb %0, [%1], #1\n\ |
214 | mov %0, %0, lsr #8\n\ |
215 | strb %0, [%1], #1\n\ |
216 | subs %3, %3, #2\n\ |
217 | bmi 2f\n\ |
218 | ldr %0, [%2], #4\n\ |
219 | strb %0, [%1], #1\n\ |
220 | mov %0, %0, lsr #8\n\ |
221 | strb %0, [%1], #1\n\ |
222 | subs %3, %3, #2\n\ |
223 | bmi 2f\n\ |
224 | ldr %0, [%2], #4\n\ |
225 | strb %0, [%1], #1\n\ |
226 | mov %0, %0, lsr #8\n\ |
227 | strb %0, [%1], #1\n\ |
228 | subs %3, %3, #2\n\ |
229 | bmi 2f\n\ |
230 | ldr %0, [%2], #4\n\ |
231 | strb %0, [%1], #1\n\ |
232 | mov %0, %0, lsr #8\n\ |
233 | strb %0, [%1], #1\n\ |
234 | subs %3, %3, #2\n\ |
235 | bpl 1b\n\ |
236 | 2: adds %3, %3, #1\n\ |
237 | ldreqb %0, [%2]\n\ |
238 | streqb %0, [%1]" |
239 | : "=&r" (used), "=&r" (data) |
240 | : "r" (addr), "r" (thislen), "1" (data)); |
241 | |
242 | addr = ETHER1_RAM; |
243 | |
244 | thislen = length; |
245 | if (thislen > 4096) |
246 | thislen = 4096; |
247 | page++; |
248 | } while (thislen); |
249 | } |
250 | |
251 | static int |
252 | ether1_ramtest(struct net_device *dev, unsigned char byte) |
253 | { |
254 | unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL); |
255 | int i, ret = BUFFER_SIZE; |
256 | int max_errors = 15; |
257 | int bad = -1; |
258 | int bad_start = 0; |
259 | |
260 | if (!buffer) |
261 | return 1; |
262 | |
263 | memset (buffer, byte, BUFFER_SIZE); |
264 | ether1_writebuffer (dev, data: buffer, start: 0, BUFFER_SIZE); |
265 | memset (buffer, byte ^ 0xff, BUFFER_SIZE); |
266 | ether1_readbuffer (dev, data: buffer, start: 0, BUFFER_SIZE); |
267 | |
268 | for (i = 0; i < BUFFER_SIZE; i++) { |
269 | if (buffer[i] != byte) { |
270 | if (max_errors >= 0 && bad != buffer[i]) { |
271 | if (bad != -1) |
272 | printk ("\n" ); |
273 | printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X" , |
274 | dev->name, buffer[i], byte, i); |
275 | ret = -ENODEV; |
276 | max_errors --; |
277 | bad = buffer[i]; |
278 | bad_start = i; |
279 | } |
280 | } else { |
281 | if (bad != -1) { |
282 | if (bad_start == i - 1) |
283 | printk ("\n" ); |
284 | else |
285 | printk (" - 0x%04X\n" , i - 1); |
286 | bad = -1; |
287 | } |
288 | } |
289 | } |
290 | |
291 | if (bad != -1) |
292 | printk (" - 0x%04X\n" , BUFFER_SIZE); |
293 | kfree (objp: buffer); |
294 | |
295 | return ret; |
296 | } |
297 | |
298 | static int |
299 | ether1_reset (struct net_device *dev) |
300 | { |
301 | writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); |
302 | return BUS_16; |
303 | } |
304 | |
305 | static int |
306 | ether1_init_2(struct net_device *dev) |
307 | { |
308 | int i; |
309 | dev->mem_start = 0; |
310 | |
311 | i = ether1_ramtest (dev, byte: 0x5a); |
312 | |
313 | if (i > 0) |
314 | i = ether1_ramtest (dev, byte: 0x1e); |
315 | |
316 | if (i <= 0) |
317 | return -ENODEV; |
318 | |
319 | dev->mem_end = i; |
320 | return 0; |
321 | } |
322 | |
323 | /* |
324 | * These are the structures that are loaded into the ether RAM card to |
325 | * initialise the 82586 |
326 | */ |
327 | |
328 | /* at 0x0100 */ |
329 | #define NOP_ADDR (TX_AREA_START) |
330 | #define NOP_SIZE (0x06) |
331 | static nop_t init_nop = { |
332 | 0, |
333 | CMD_NOP, |
334 | NOP_ADDR |
335 | }; |
336 | |
337 | /* at 0x003a */ |
338 | #define TDR_ADDR (0x003a) |
339 | #define TDR_SIZE (0x08) |
340 | static tdr_t init_tdr = { |
341 | 0, |
342 | CMD_TDR | CMD_INTR, |
343 | NOP_ADDR, |
344 | 0 |
345 | }; |
346 | |
347 | /* at 0x002e */ |
348 | #define MC_ADDR (0x002e) |
349 | #define MC_SIZE (0x0c) |
350 | static mc_t init_mc = { |
351 | 0, |
352 | CMD_SETMULTICAST, |
353 | TDR_ADDR, |
354 | 0, |
355 | { { 0, } } |
356 | }; |
357 | |
358 | /* at 0x0022 */ |
359 | #define SA_ADDR (0x0022) |
360 | #define SA_SIZE (0x0c) |
361 | static sa_t init_sa = { |
362 | 0, |
363 | CMD_SETADDRESS, |
364 | MC_ADDR, |
365 | { 0, } |
366 | }; |
367 | |
368 | /* at 0x0010 */ |
369 | #define CFG_ADDR (0x0010) |
370 | #define CFG_SIZE (0x12) |
371 | static cfg_t init_cfg = { |
372 | 0, |
373 | CMD_CONFIG, |
374 | SA_ADDR, |
375 | 8, |
376 | 8, |
377 | CFG8_SRDY, |
378 | CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6), |
379 | 0, |
380 | 0x60, |
381 | 0, |
382 | CFG13_RETRY(15) | CFG13_SLOTH(2), |
383 | 0, |
384 | }; |
385 | |
386 | /* at 0x0000 */ |
387 | #define SCB_ADDR (0x0000) |
388 | #define SCB_SIZE (0x10) |
389 | static scb_t init_scb = { |
390 | 0, |
391 | SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX, |
392 | CFG_ADDR, |
393 | RX_AREA_START, |
394 | 0, |
395 | 0, |
396 | 0, |
397 | 0 |
398 | }; |
399 | |
400 | /* at 0xffee */ |
401 | #define ISCP_ADDR (0xffee) |
402 | #define ISCP_SIZE (0x08) |
403 | static iscp_t init_iscp = { |
404 | 1, |
405 | SCB_ADDR, |
406 | 0x0000, |
407 | 0x0000 |
408 | }; |
409 | |
410 | /* at 0xfff6 */ |
411 | #define SCP_ADDR (0xfff6) |
412 | #define SCP_SIZE (0x0a) |
413 | static scp_t init_scp = { |
414 | SCP_SY_16BBUS, |
415 | { 0, 0 }, |
416 | ISCP_ADDR, |
417 | 0 |
418 | }; |
419 | |
420 | #define RFD_SIZE (0x16) |
421 | static rfd_t init_rfd = { |
422 | 0, |
423 | 0, |
424 | 0, |
425 | 0, |
426 | { 0, }, |
427 | { 0, }, |
428 | 0 |
429 | }; |
430 | |
431 | #define RBD_SIZE (0x0a) |
432 | static rbd_t init_rbd = { |
433 | 0, |
434 | 0, |
435 | 0, |
436 | 0, |
437 | ETH_FRAME_LEN + 8 |
438 | }; |
439 | |
440 | #define TX_SIZE (0x08) |
441 | #define TBD_SIZE (0x08) |
442 | |
443 | static int |
444 | ether1_init_for_open (struct net_device *dev) |
445 | { |
446 | int i, status, addr, next, next2; |
447 | int failures = 0; |
448 | unsigned long timeout; |
449 | |
450 | writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); |
451 | |
452 | for (i = 0; i < 6; i++) |
453 | init_sa.sa_addr[i] = dev->dev_addr[i]; |
454 | |
455 | /* load data structures into ether1 RAM */ |
456 | ether1_writebuffer (dev, data: &init_scp, SCP_ADDR, SCP_SIZE); |
457 | ether1_writebuffer (dev, data: &init_iscp, ISCP_ADDR, ISCP_SIZE); |
458 | ether1_writebuffer (dev, data: &init_scb, SCB_ADDR, SCB_SIZE); |
459 | ether1_writebuffer (dev, data: &init_cfg, CFG_ADDR, CFG_SIZE); |
460 | ether1_writebuffer (dev, data: &init_sa, SA_ADDR, SA_SIZE); |
461 | ether1_writebuffer (dev, data: &init_mc, MC_ADDR, MC_SIZE); |
462 | ether1_writebuffer (dev, data: &init_tdr, TDR_ADDR, TDR_SIZE); |
463 | ether1_writebuffer (dev, data: &init_nop, NOP_ADDR, NOP_SIZE); |
464 | |
465 | if (ether1_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) { |
466 | printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n" , |
467 | dev->name); |
468 | return 1; |
469 | } |
470 | |
471 | /* |
472 | * setup circularly linked list of { rfd, rbd, buffer }, with |
473 | * all rfds circularly linked, rbds circularly linked. |
474 | * First rfd is linked to scp, first rbd is linked to first |
475 | * rfd. Last rbd has a suspend command. |
476 | */ |
477 | addr = RX_AREA_START; |
478 | do { |
479 | next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10; |
480 | next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10; |
481 | |
482 | if (next2 >= RX_AREA_END) { |
483 | next = RX_AREA_START; |
484 | init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND; |
485 | priv(dev)->rx_tail = addr; |
486 | } else |
487 | init_rfd.rfd_command = 0; |
488 | if (addr == RX_AREA_START) |
489 | init_rfd.rfd_rbdoffset = addr + RFD_SIZE; |
490 | else |
491 | init_rfd.rfd_rbdoffset = 0; |
492 | init_rfd.rfd_link = next; |
493 | init_rbd.rbd_link = next + RFD_SIZE; |
494 | init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE; |
495 | |
496 | ether1_writebuffer (dev, data: &init_rfd, start: addr, RFD_SIZE); |
497 | ether1_writebuffer (dev, data: &init_rbd, start: addr + RFD_SIZE, RBD_SIZE); |
498 | addr = next; |
499 | } while (next2 < RX_AREA_END); |
500 | |
501 | priv(dev)->tx_link = NOP_ADDR; |
502 | priv(dev)->tx_head = NOP_ADDR + NOP_SIZE; |
503 | priv(dev)->tx_tail = TDR_ADDR; |
504 | priv(dev)->rx_head = RX_AREA_START; |
505 | |
506 | /* release reset & give 586 a prod */ |
507 | priv(dev)->resetting = 1; |
508 | priv(dev)->initialising = 1; |
509 | writeb(CTRL_RST, REG_CONTROL); |
510 | writeb(val: 0, REG_CONTROL); |
511 | writeb(CTRL_CA, REG_CONTROL); |
512 | |
513 | /* 586 should now unset iscp.busy */ |
514 | timeout = jiffies + HZ/2; |
515 | while (ether1_readw(dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) { |
516 | if (time_after(jiffies, timeout)) { |
517 | printk (KERN_WARNING "%s: can't initialise 82586: iscp is busy\n" , dev->name); |
518 | return 1; |
519 | } |
520 | } |
521 | |
522 | /* check status of commands that we issued */ |
523 | timeout += HZ/10; |
524 | while (((status = ether1_readw(dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS)) |
525 | & STAT_COMPLETE) == 0) { |
526 | if (time_after(jiffies, timeout)) |
527 | break; |
528 | } |
529 | |
530 | if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { |
531 | printk (KERN_WARNING "%s: can't initialise 82586: config status %04X\n" , dev->name, status); |
532 | printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n" , dev->name, |
533 | ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), |
534 | ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), |
535 | ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), |
536 | ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); |
537 | failures += 1; |
538 | } |
539 | |
540 | timeout += HZ/10; |
541 | while (((status = ether1_readw(dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS)) |
542 | & STAT_COMPLETE) == 0) { |
543 | if (time_after(jiffies, timeout)) |
544 | break; |
545 | } |
546 | |
547 | if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { |
548 | printk (KERN_WARNING "%s: can't initialise 82586: set address status %04X\n" , dev->name, status); |
549 | printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n" , dev->name, |
550 | ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), |
551 | ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), |
552 | ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), |
553 | ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); |
554 | failures += 1; |
555 | } |
556 | |
557 | timeout += HZ/10; |
558 | while (((status = ether1_readw(dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS)) |
559 | & STAT_COMPLETE) == 0) { |
560 | if (time_after(jiffies, timeout)) |
561 | break; |
562 | } |
563 | |
564 | if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { |
565 | printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04X\n" , dev->name, status); |
566 | printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n" , dev->name, |
567 | ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), |
568 | ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), |
569 | ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), |
570 | ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); |
571 | failures += 1; |
572 | } |
573 | |
574 | timeout += HZ; |
575 | while (((status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS)) |
576 | & STAT_COMPLETE) == 0) { |
577 | if (time_after(jiffies, timeout)) |
578 | break; |
579 | } |
580 | |
581 | if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { |
582 | printk (KERN_WARNING "%s: can't tdr (ignored)\n" , dev->name); |
583 | printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n" , dev->name, |
584 | ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), |
585 | ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), |
586 | ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), |
587 | ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); |
588 | } else { |
589 | status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS); |
590 | if (status & TDR_XCVRPROB) |
591 | printk (KERN_WARNING "%s: i/f failed tdr: transceiver problem\n" , dev->name); |
592 | else if ((status & (TDR_SHORT|TDR_OPEN)) && (status & TDR_TIME)) { |
593 | #ifdef FANCY |
594 | printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d.%d us away\n" , dev->name, |
595 | status & TDR_SHORT ? "short" : "open" , (status & TDR_TIME) / 10, |
596 | (status & TDR_TIME) % 10); |
597 | #else |
598 | printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d clks away\n" , dev->name, |
599 | status & TDR_SHORT ? "short" : "open" , (status & TDR_TIME)); |
600 | #endif |
601 | } |
602 | } |
603 | |
604 | if (failures) |
605 | ether1_reset (dev); |
606 | return failures ? 1 : 0; |
607 | } |
608 | |
609 | /* ------------------------------------------------------------------------- */ |
610 | |
611 | static int |
612 | ether1_txalloc (struct net_device *dev, int size) |
613 | { |
614 | int start, tail; |
615 | |
616 | size = (size + 1) & ~1; |
617 | tail = priv(dev)->tx_tail; |
618 | |
619 | if (priv(dev)->tx_head + size > TX_AREA_END) { |
620 | if (tail > priv(dev)->tx_head) |
621 | return -1; |
622 | start = TX_AREA_START; |
623 | if (start + size > tail) |
624 | return -1; |
625 | priv(dev)->tx_head = start + size; |
626 | } else { |
627 | if (priv(dev)->tx_head < tail && (priv(dev)->tx_head + size) > tail) |
628 | return -1; |
629 | start = priv(dev)->tx_head; |
630 | priv(dev)->tx_head += size; |
631 | } |
632 | |
633 | return start; |
634 | } |
635 | |
636 | static int |
637 | ether1_open (struct net_device *dev) |
638 | { |
639 | if (request_irq(irq: dev->irq, handler: ether1_interrupt, flags: 0, name: "ether1" , dev)) |
640 | return -EAGAIN; |
641 | |
642 | if (ether1_init_for_open (dev)) { |
643 | free_irq (dev->irq, dev); |
644 | return -EAGAIN; |
645 | } |
646 | |
647 | netif_start_queue(dev); |
648 | |
649 | return 0; |
650 | } |
651 | |
652 | static void |
653 | ether1_timeout(struct net_device *dev, unsigned int txqueue) |
654 | { |
655 | printk(KERN_WARNING "%s: transmit timeout, network cable problem?\n" , |
656 | dev->name); |
657 | printk(KERN_WARNING "%s: resetting device\n" , dev->name); |
658 | |
659 | ether1_reset (dev); |
660 | |
661 | if (ether1_init_for_open (dev)) |
662 | printk (KERN_ERR "%s: unable to restart interface\n" , dev->name); |
663 | |
664 | dev->stats.tx_errors++; |
665 | netif_wake_queue(dev); |
666 | } |
667 | |
668 | static netdev_tx_t |
669 | ether1_sendpacket (struct sk_buff *skb, struct net_device *dev) |
670 | { |
671 | int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr; |
672 | unsigned long flags; |
673 | tx_t tx; |
674 | tbd_t tbd; |
675 | nop_t nop; |
676 | |
677 | if (priv(dev)->restart) { |
678 | printk(KERN_WARNING "%s: resetting device\n" , dev->name); |
679 | |
680 | ether1_reset(dev); |
681 | |
682 | if (ether1_init_for_open(dev)) |
683 | printk(KERN_ERR "%s: unable to restart interface\n" , dev->name); |
684 | else |
685 | priv(dev)->restart = 0; |
686 | } |
687 | |
688 | if (skb->len < ETH_ZLEN) { |
689 | if (skb_padto(skb, ETH_ZLEN)) |
690 | goto out; |
691 | } |
692 | |
693 | /* |
694 | * insert packet followed by a nop |
695 | */ |
696 | txaddr = ether1_txalloc (dev, TX_SIZE); |
697 | tbdaddr = ether1_txalloc (dev, TBD_SIZE); |
698 | dataddr = ether1_txalloc (dev, size: skb->len); |
699 | nopaddr = ether1_txalloc (dev, NOP_SIZE); |
700 | |
701 | tx.tx_status = 0; |
702 | tx.tx_command = CMD_TX | CMD_INTR; |
703 | tx.tx_link = nopaddr; |
704 | tx.tx_tbdoffset = tbdaddr; |
705 | tbd.tbd_opts = TBD_EOL | skb->len; |
706 | tbd.tbd_link = I82586_NULL; |
707 | tbd.tbd_bufl = dataddr; |
708 | tbd.tbd_bufh = 0; |
709 | nop.nop_status = 0; |
710 | nop.nop_command = CMD_NOP; |
711 | nop.nop_link = nopaddr; |
712 | |
713 | local_irq_save(flags); |
714 | ether1_writebuffer (dev, data: &tx, start: txaddr, TX_SIZE); |
715 | ether1_writebuffer (dev, data: &tbd, start: tbdaddr, TBD_SIZE); |
716 | ether1_writebuffer (dev, data: skb->data, start: dataddr, length: skb->len); |
717 | ether1_writebuffer (dev, data: &nop, start: nopaddr, NOP_SIZE); |
718 | tmp = priv(dev)->tx_link; |
719 | priv(dev)->tx_link = nopaddr; |
720 | |
721 | /* now reset the previous nop pointer */ |
722 | ether1_writew(dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS); |
723 | |
724 | local_irq_restore(flags); |
725 | |
726 | /* handle transmit */ |
727 | |
728 | /* check to see if we have room for a full sized ether frame */ |
729 | tmp = priv(dev)->tx_head; |
730 | tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); |
731 | priv(dev)->tx_head = tmp; |
732 | dev_kfree_skb (skb); |
733 | |
734 | if (tst == -1) |
735 | netif_stop_queue(dev); |
736 | |
737 | out: |
738 | return NETDEV_TX_OK; |
739 | } |
740 | |
741 | static void |
742 | ether1_xmit_done (struct net_device *dev) |
743 | { |
744 | nop_t nop; |
745 | int caddr, tst; |
746 | |
747 | caddr = priv(dev)->tx_tail; |
748 | |
749 | again: |
750 | ether1_readbuffer (dev, data: &nop, start: caddr, NOP_SIZE); |
751 | |
752 | switch (nop.nop_command & CMD_MASK) { |
753 | case CMD_TDR: |
754 | /* special case */ |
755 | if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) |
756 | != (unsigned short)I82586_NULL) { |
757 | ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t, |
758 | scb_command, NORMALIRQS); |
759 | writeb(CTRL_CA, REG_CONTROL); |
760 | } |
761 | priv(dev)->tx_tail = NOP_ADDR; |
762 | return; |
763 | |
764 | case CMD_NOP: |
765 | if (nop.nop_link == caddr) { |
766 | if (priv(dev)->initialising == 0) |
767 | printk (KERN_WARNING "%s: strange command complete with no tx command!\n" , dev->name); |
768 | else |
769 | priv(dev)->initialising = 0; |
770 | return; |
771 | } |
772 | if (caddr == nop.nop_link) |
773 | return; |
774 | caddr = nop.nop_link; |
775 | goto again; |
776 | |
777 | case CMD_TX: |
778 | if (nop.nop_status & STAT_COMPLETE) |
779 | break; |
780 | printk (KERN_ERR "%s: strange command complete without completed command\n" , dev->name); |
781 | priv(dev)->restart = 1; |
782 | return; |
783 | |
784 | default: |
785 | printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)" , dev->name, |
786 | nop.nop_command & CMD_MASK, caddr); |
787 | priv(dev)->restart = 1; |
788 | return; |
789 | } |
790 | |
791 | while (nop.nop_status & STAT_COMPLETE) { |
792 | if (nop.nop_status & STAT_OK) { |
793 | dev->stats.tx_packets++; |
794 | dev->stats.collisions += (nop.nop_status & STAT_COLLISIONS); |
795 | } else { |
796 | dev->stats.tx_errors++; |
797 | |
798 | if (nop.nop_status & STAT_COLLAFTERTX) |
799 | dev->stats.collisions++; |
800 | if (nop.nop_status & STAT_NOCARRIER) |
801 | dev->stats.tx_carrier_errors++; |
802 | if (nop.nop_status & STAT_TXLOSTCTS) |
803 | printk (KERN_WARNING "%s: cts lost\n" , dev->name); |
804 | if (nop.nop_status & STAT_TXSLOWDMA) |
805 | dev->stats.tx_fifo_errors++; |
806 | if (nop.nop_status & STAT_COLLEXCESSIVE) |
807 | dev->stats.collisions += 16; |
808 | } |
809 | |
810 | if (nop.nop_link == caddr) { |
811 | printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n" , dev->name); |
812 | break; |
813 | } |
814 | |
815 | caddr = nop.nop_link; |
816 | ether1_readbuffer (dev, data: &nop, start: caddr, NOP_SIZE); |
817 | if ((nop.nop_command & CMD_MASK) != CMD_NOP) { |
818 | printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx command\n" , dev->name); |
819 | break; |
820 | } |
821 | |
822 | if (caddr == nop.nop_link) |
823 | break; |
824 | |
825 | caddr = nop.nop_link; |
826 | ether1_readbuffer (dev, data: &nop, start: caddr, NOP_SIZE); |
827 | if ((nop.nop_command & CMD_MASK) != CMD_TX) { |
828 | printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nop\n" , dev->name); |
829 | break; |
830 | } |
831 | } |
832 | priv(dev)->tx_tail = caddr; |
833 | |
834 | caddr = priv(dev)->tx_head; |
835 | tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); |
836 | priv(dev)->tx_head = caddr; |
837 | if (tst != -1) |
838 | netif_wake_queue(dev); |
839 | } |
840 | |
841 | static void |
842 | ether1_recv_done (struct net_device *dev) |
843 | { |
844 | int status; |
845 | int nexttail, rbdaddr; |
846 | rbd_t rbd; |
847 | |
848 | do { |
849 | status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS); |
850 | if ((status & RFD_COMPLETE) == 0) |
851 | break; |
852 | |
853 | rbdaddr = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS); |
854 | ether1_readbuffer (dev, data: &rbd, start: rbdaddr, RBD_SIZE); |
855 | |
856 | if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) { |
857 | int length = rbd.rbd_status & RBD_ACNT; |
858 | struct sk_buff *skb; |
859 | |
860 | length = (length + 1) & ~1; |
861 | skb = netdev_alloc_skb(dev, length: length + 2); |
862 | |
863 | if (skb) { |
864 | skb_reserve (skb, len: 2); |
865 | |
866 | ether1_readbuffer (dev, data: skb_put (skb, len: length), start: rbd.rbd_bufl, length); |
867 | |
868 | skb->protocol = eth_type_trans (skb, dev); |
869 | netif_rx (skb); |
870 | dev->stats.rx_packets++; |
871 | } else |
872 | dev->stats.rx_dropped++; |
873 | } else { |
874 | printk(KERN_WARNING "%s: %s\n" , dev->name, |
875 | (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid" ); |
876 | dev->stats.rx_dropped++; |
877 | } |
878 | |
879 | nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS); |
880 | /* nexttail should be rx_head */ |
881 | if (nexttail != priv(dev)->rx_head) |
882 | printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n" , |
883 | dev->name, nexttail, priv(dev)->rx_head); |
884 | ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS); |
885 | ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS); |
886 | ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS); |
887 | ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS); |
888 | |
889 | priv(dev)->rx_tail = nexttail; |
890 | priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS); |
891 | } while (1); |
892 | } |
893 | |
894 | static irqreturn_t |
895 | ether1_interrupt (int irq, void *dev_id) |
896 | { |
897 | struct net_device *dev = (struct net_device *)dev_id; |
898 | int status; |
899 | |
900 | status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS); |
901 | |
902 | if (status) { |
903 | ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX), |
904 | SCB_ADDR, scb_t, scb_command, NORMALIRQS); |
905 | writeb(CTRL_CA | CTRL_ACK, REG_CONTROL); |
906 | if (status & SCB_STCX) { |
907 | ether1_xmit_done (dev); |
908 | } |
909 | if (status & SCB_STCNA) { |
910 | if (priv(dev)->resetting == 0) |
911 | printk (KERN_WARNING "%s: CU went not ready ???\n" , dev->name); |
912 | else |
913 | priv(dev)->resetting += 1; |
914 | if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) |
915 | != (unsigned short)I82586_NULL) { |
916 | ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS); |
917 | writeb(CTRL_CA, REG_CONTROL); |
918 | } |
919 | if (priv(dev)->resetting == 2) |
920 | priv(dev)->resetting = 0; |
921 | } |
922 | if (status & SCB_STFR) { |
923 | ether1_recv_done (dev); |
924 | } |
925 | if (status & SCB_STRNR) { |
926 | if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) { |
927 | printk (KERN_WARNING "%s: RU went not ready: RU suspended\n" , dev->name); |
928 | ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS); |
929 | writeb(CTRL_CA, REG_CONTROL); |
930 | dev->stats.rx_dropped++; /* we suspended due to lack of buffer space */ |
931 | } else |
932 | printk(KERN_WARNING "%s: RU went not ready: %04X\n" , dev->name, |
933 | ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS)); |
934 | printk (KERN_WARNING "RU ptr = %04X\n" , ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, |
935 | NORMALIRQS)); |
936 | } |
937 | } else |
938 | writeb(CTRL_ACK, REG_CONTROL); |
939 | |
940 | return IRQ_HANDLED; |
941 | } |
942 | |
943 | static int |
944 | ether1_close (struct net_device *dev) |
945 | { |
946 | ether1_reset (dev); |
947 | |
948 | free_irq(dev->irq, dev); |
949 | |
950 | return 0; |
951 | } |
952 | |
953 | /* |
954 | * Set or clear the multicast filter for this adaptor. |
955 | * num_addrs == -1 Promiscuous mode, receive all packets. |
956 | * num_addrs == 0 Normal mode, clear multicast list. |
957 | * num_addrs > 0 Multicast mode, receive normal and MC packets, and do |
958 | * best-effort filtering. |
959 | */ |
960 | static void |
961 | ether1_setmulticastlist (struct net_device *dev) |
962 | { |
963 | } |
964 | |
965 | /* ------------------------------------------------------------------------- */ |
966 | |
967 | static void ether1_banner(void) |
968 | { |
969 | static unsigned int version_printed = 0; |
970 | |
971 | if (net_debug && version_printed++ == 0) |
972 | printk(KERN_INFO "%s" , version); |
973 | } |
974 | |
975 | static const struct net_device_ops ether1_netdev_ops = { |
976 | .ndo_open = ether1_open, |
977 | .ndo_stop = ether1_close, |
978 | .ndo_start_xmit = ether1_sendpacket, |
979 | .ndo_set_rx_mode = ether1_setmulticastlist, |
980 | .ndo_tx_timeout = ether1_timeout, |
981 | .ndo_validate_addr = eth_validate_addr, |
982 | .ndo_set_mac_address = eth_mac_addr, |
983 | }; |
984 | |
985 | static int |
986 | ether1_probe(struct expansion_card *ec, const struct ecard_id *id) |
987 | { |
988 | struct net_device *dev; |
989 | u8 addr[ETH_ALEN]; |
990 | int i, ret = 0; |
991 | |
992 | ether1_banner(); |
993 | |
994 | ret = ecard_request_resources(ec); |
995 | if (ret) |
996 | goto out; |
997 | |
998 | dev = alloc_etherdev(sizeof(struct ether1_priv)); |
999 | if (!dev) { |
1000 | ret = -ENOMEM; |
1001 | goto release; |
1002 | } |
1003 | |
1004 | SET_NETDEV_DEV(dev, &ec->dev); |
1005 | |
1006 | dev->irq = ec->irq; |
1007 | priv(dev)->base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); |
1008 | if (!priv(dev)->base) { |
1009 | ret = -ENOMEM; |
1010 | goto free; |
1011 | } |
1012 | |
1013 | if ((priv(dev)->bus_type = ether1_reset(dev)) == 0) { |
1014 | ret = -ENODEV; |
1015 | goto free; |
1016 | } |
1017 | |
1018 | for (i = 0; i < 6; i++) |
1019 | addr[i] = readb(IDPROM_ADDRESS + (i << 2)); |
1020 | eth_hw_addr_set(dev, addr); |
1021 | |
1022 | if (ether1_init_2(dev)) { |
1023 | ret = -ENODEV; |
1024 | goto free; |
1025 | } |
1026 | |
1027 | dev->netdev_ops = ðer1_netdev_ops; |
1028 | dev->watchdog_timeo = 5 * HZ / 100; |
1029 | |
1030 | ret = register_netdev(dev); |
1031 | if (ret) |
1032 | goto free; |
1033 | |
1034 | printk(KERN_INFO "%s: ether1 in slot %d, %pM\n" , |
1035 | dev->name, ec->slot_no, dev->dev_addr); |
1036 | |
1037 | ecard_set_drvdata(ec, dev); |
1038 | return 0; |
1039 | |
1040 | free: |
1041 | free_netdev(dev); |
1042 | release: |
1043 | ecard_release_resources(ec); |
1044 | out: |
1045 | return ret; |
1046 | } |
1047 | |
1048 | static void ether1_remove(struct expansion_card *ec) |
1049 | { |
1050 | struct net_device *dev = ecard_get_drvdata(ec); |
1051 | |
1052 | ecard_set_drvdata(ec, NULL); |
1053 | |
1054 | unregister_netdev(dev); |
1055 | free_netdev(dev); |
1056 | ecard_release_resources(ec); |
1057 | } |
1058 | |
1059 | static const struct ecard_id ether1_ids[] = { |
1060 | { MANU_ACORN, PROD_ACORN_ETHER1 }, |
1061 | { 0xffff, 0xffff } |
1062 | }; |
1063 | |
1064 | static struct ecard_driver ether1_driver = { |
1065 | .probe = ether1_probe, |
1066 | .remove = ether1_remove, |
1067 | .id_table = ether1_ids, |
1068 | .drv = { |
1069 | .name = "ether1" , |
1070 | }, |
1071 | }; |
1072 | |
1073 | static int __init ether1_init(void) |
1074 | { |
1075 | return ecard_register_driver(ðer1_driver); |
1076 | } |
1077 | |
1078 | static void __exit ether1_exit(void) |
1079 | { |
1080 | ecard_remove_driver(ðer1_driver); |
1081 | } |
1082 | |
1083 | module_init(ether1_init); |
1084 | module_exit(ether1_exit); |
1085 | |
1086 | MODULE_LICENSE("GPL" ); |
1087 | |