1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2008-2010
4 *
5 * - Kurt Van Dijck, EIA Electronics
6 */
7
8 #include <linux/firmware.h>
9 #include <linux/sched/signal.h>
10 #include <asm/div64.h>
11 #include <asm/io.h>
12
13 #include "softing.h"
14
15 /*
16 * low level DPRAM command.
17 * Make sure that card->dpram[DPRAM_FCT_HOST] is preset
18 */
_softing_fct_cmd(struct softing * card,int16_t cmd,uint16_t vector,const char * msg)19 static int _softing_fct_cmd(struct softing *card, int16_t cmd, uint16_t vector,
20 const char *msg)
21 {
22 int ret;
23 unsigned long stamp;
24
25 iowrite16(cmd, &card->dpram[DPRAM_FCT_PARAM]);
26 iowrite8(vector >> 8, &card->dpram[DPRAM_FCT_HOST + 1]);
27 iowrite8(vector, &card->dpram[DPRAM_FCT_HOST]);
28 /* be sure to flush this to the card */
29 wmb();
30 stamp = jiffies + 1 * HZ;
31 /* wait for card */
32 do {
33 /* DPRAM_FCT_HOST is _not_ aligned */
34 ret = ioread8(&card->dpram[DPRAM_FCT_HOST]) +
35 (ioread8(&card->dpram[DPRAM_FCT_HOST + 1]) << 8);
36 /* don't have any cached variables */
37 rmb();
38 if (ret == RES_OK)
39 /* read return-value now */
40 return ioread16(&card->dpram[DPRAM_FCT_RESULT]);
41
42 if ((ret != vector) || time_after(jiffies, stamp))
43 break;
44 /* process context => relax */
45 usleep_range(500, 10000);
46 } while (1);
47
48 ret = (ret == RES_NONE) ? -ETIMEDOUT : -ECANCELED;
49 dev_alert(&card->pdev->dev, "firmware %s failed (%i)\n", msg, ret);
50 return ret;
51 }
52
softing_fct_cmd(struct softing * card,int16_t cmd,const char * msg)53 static int softing_fct_cmd(struct softing *card, int16_t cmd, const char *msg)
54 {
55 int ret;
56
57 ret = _softing_fct_cmd(card, cmd, 0, msg);
58 if (ret > 0) {
59 dev_alert(&card->pdev->dev, "%s returned %u\n", msg, ret);
60 ret = -EIO;
61 }
62 return ret;
63 }
64
softing_bootloader_command(struct softing * card,int16_t cmd,const char * msg)65 int softing_bootloader_command(struct softing *card, int16_t cmd,
66 const char *msg)
67 {
68 int ret;
69 unsigned long stamp;
70
71 iowrite16(RES_NONE, &card->dpram[DPRAM_RECEIPT]);
72 iowrite16(cmd, &card->dpram[DPRAM_COMMAND]);
73 /* be sure to flush this to the card */
74 wmb();
75 stamp = jiffies + 3 * HZ;
76 /* wait for card */
77 do {
78 ret = ioread16(&card->dpram[DPRAM_RECEIPT]);
79 /* don't have any cached variables */
80 rmb();
81 if (ret == RES_OK)
82 return 0;
83 if (time_after(jiffies, stamp))
84 break;
85 /* process context => relax */
86 usleep_range(500, 10000);
87 } while (!signal_pending(current));
88
89 ret = (ret == RES_NONE) ? -ETIMEDOUT : -ECANCELED;
90 dev_alert(&card->pdev->dev, "bootloader %s failed (%i)\n", msg, ret);
91 return ret;
92 }
93
fw_parse(const uint8_t ** pmem,uint16_t * ptype,uint32_t * paddr,uint16_t * plen,const uint8_t ** pdat)94 static int fw_parse(const uint8_t **pmem, uint16_t *ptype, uint32_t *paddr,
95 uint16_t *plen, const uint8_t **pdat)
96 {
97 uint16_t checksum[2];
98 const uint8_t *mem;
99 const uint8_t *end;
100
101 /*
102 * firmware records are a binary, unaligned stream composed of:
103 * uint16_t type;
104 * uint32_t addr;
105 * uint16_t len;
106 * uint8_t dat[len];
107 * uint16_t checksum;
108 * all values in little endian.
109 * We could define a struct for this, with __attribute__((packed)),
110 * but would that solve the alignment in _all_ cases (cfr. the
111 * struct itself may be an odd address)?
112 *
113 * I chose to use leXX_to_cpup() since this solves both
114 * endianness & alignment.
115 */
116 mem = *pmem;
117 *ptype = le16_to_cpup((void *)&mem[0]);
118 *paddr = le32_to_cpup((void *)&mem[2]);
119 *plen = le16_to_cpup((void *)&mem[6]);
120 *pdat = &mem[8];
121 /* verify checksum */
122 end = &mem[8 + *plen];
123 checksum[0] = le16_to_cpup((void *)end);
124 for (checksum[1] = 0; mem < end; ++mem)
125 checksum[1] += *mem;
126 if (checksum[0] != checksum[1])
127 return -EINVAL;
128 /* increment */
129 *pmem += 10 + *plen;
130 return 0;
131 }
132
softing_load_fw(const char * file,struct softing * card,__iomem uint8_t * dpram,unsigned int size,int offset)133 int softing_load_fw(const char *file, struct softing *card,
134 __iomem uint8_t *dpram, unsigned int size, int offset)
135 {
136 const struct firmware *fw;
137 int ret;
138 const uint8_t *mem, *end, *dat;
139 uint16_t type, len;
140 uint32_t addr;
141 uint8_t *buf = NULL, *new_buf;
142 int buflen = 0;
143 int8_t type_end = 0;
144
145 ret = request_firmware(&fw, file, &card->pdev->dev);
146 if (ret < 0)
147 return ret;
148 dev_dbg(&card->pdev->dev, "%s, firmware(%s) got %u bytes"
149 ", offset %c0x%04x\n",
150 card->pdat->name, file, (unsigned int)fw->size,
151 (offset >= 0) ? '+' : '-', (unsigned int)abs(offset));
152 /* parse the firmware */
153 mem = fw->data;
154 end = &mem[fw->size];
155 /* look for header record */
156 ret = fw_parse(&mem, &type, &addr, &len, &dat);
157 if (ret < 0)
158 goto failed;
159 if (type != 0xffff)
160 goto failed;
161 if (strncmp("Structured Binary Format, Softing GmbH" , dat, len)) {
162 ret = -EINVAL;
163 goto failed;
164 }
165 /* ok, we had a header */
166 while (mem < end) {
167 ret = fw_parse(&mem, &type, &addr, &len, &dat);
168 if (ret < 0)
169 goto failed;
170 if (type == 3) {
171 /* start address, not used here */
172 continue;
173 } else if (type == 1) {
174 /* eof */
175 type_end = 1;
176 break;
177 } else if (type != 0) {
178 ret = -EINVAL;
179 goto failed;
180 }
181
182 if ((addr + len + offset) > size)
183 goto failed;
184 memcpy_toio(&dpram[addr + offset], dat, len);
185 /* be sure to flush caches from IO space */
186 mb();
187 if (len > buflen) {
188 /* align buflen */
189 buflen = (len + (1024-1)) & ~(1024-1);
190 new_buf = krealloc(buf, buflen, GFP_KERNEL);
191 if (!new_buf) {
192 ret = -ENOMEM;
193 goto failed;
194 }
195 buf = new_buf;
196 }
197 /* verify record data */
198 memcpy_fromio(buf, &dpram[addr + offset], len);
199 if (memcmp(buf, dat, len)) {
200 /* is not ok */
201 dev_alert(&card->pdev->dev, "DPRAM readback failed\n");
202 ret = -EIO;
203 goto failed;
204 }
205 }
206 if (!type_end)
207 /* no end record seen */
208 goto failed;
209 ret = 0;
210 failed:
211 kfree(buf);
212 release_firmware(fw);
213 if (ret < 0)
214 dev_info(&card->pdev->dev, "firmware %s failed\n", file);
215 return ret;
216 }
217
softing_load_app_fw(const char * file,struct softing * card)218 int softing_load_app_fw(const char *file, struct softing *card)
219 {
220 const struct firmware *fw;
221 const uint8_t *mem, *end, *dat;
222 int ret, j;
223 uint16_t type, len;
224 uint32_t addr, start_addr = 0;
225 unsigned int sum, rx_sum;
226 int8_t type_end = 0, type_entrypoint = 0;
227
228 ret = request_firmware(&fw, file, &card->pdev->dev);
229 if (ret) {
230 dev_alert(&card->pdev->dev, "request_firmware(%s) got %i\n",
231 file, ret);
232 return ret;
233 }
234 dev_dbg(&card->pdev->dev, "firmware(%s) got %lu bytes\n",
235 file, (unsigned long)fw->size);
236 /* parse the firmware */
237 mem = fw->data;
238 end = &mem[fw->size];
239 /* look for header record */
240 ret = fw_parse(&mem, &type, &addr, &len, &dat);
241 if (ret)
242 goto failed;
243 ret = -EINVAL;
244 if (type != 0xffff) {
245 dev_alert(&card->pdev->dev, "firmware starts with type 0x%x\n",
246 type);
247 goto failed;
248 }
249 if (strncmp("Structured Binary Format, Softing GmbH", dat, len)) {
250 dev_alert(&card->pdev->dev, "firmware string '%.*s' fault\n",
251 len, dat);
252 goto failed;
253 }
254 /* ok, we had a header */
255 while (mem < end) {
256 ret = fw_parse(&mem, &type, &addr, &len, &dat);
257 if (ret)
258 goto failed;
259
260 if (type == 3) {
261 /* start address */
262 start_addr = addr;
263 type_entrypoint = 1;
264 continue;
265 } else if (type == 1) {
266 /* eof */
267 type_end = 1;
268 break;
269 } else if (type != 0) {
270 dev_alert(&card->pdev->dev,
271 "unknown record type 0x%04x\n", type);
272 ret = -EINVAL;
273 goto failed;
274 }
275
276 /* regular data */
277 for (sum = 0, j = 0; j < len; ++j)
278 sum += dat[j];
279 /* work in 16bit (target) */
280 sum &= 0xffff;
281
282 memcpy_toio(&card->dpram[card->pdat->app.offs], dat, len);
283 iowrite32(card->pdat->app.offs + card->pdat->app.addr,
284 &card->dpram[DPRAM_COMMAND + 2]);
285 iowrite32(addr, &card->dpram[DPRAM_COMMAND + 6]);
286 iowrite16(len, &card->dpram[DPRAM_COMMAND + 10]);
287 iowrite8(1, &card->dpram[DPRAM_COMMAND + 12]);
288 ret = softing_bootloader_command(card, 1, "loading app.");
289 if (ret < 0)
290 goto failed;
291 /* verify checksum */
292 rx_sum = ioread16(&card->dpram[DPRAM_RECEIPT + 2]);
293 if (rx_sum != sum) {
294 dev_alert(&card->pdev->dev, "SRAM seems to be damaged"
295 ", wanted 0x%04x, got 0x%04x\n", sum, rx_sum);
296 ret = -EIO;
297 goto failed;
298 }
299 }
300 if (!type_end || !type_entrypoint)
301 goto failed;
302 /* start application in card */
303 iowrite32(start_addr, &card->dpram[DPRAM_COMMAND + 2]);
304 iowrite8(1, &card->dpram[DPRAM_COMMAND + 6]);
305 ret = softing_bootloader_command(card, 3, "start app.");
306 if (ret < 0)
307 goto failed;
308 ret = 0;
309 failed:
310 release_firmware(fw);
311 if (ret < 0)
312 dev_info(&card->pdev->dev, "firmware %s failed\n", file);
313 return ret;
314 }
315
softing_reset_chip(struct softing * card)316 static int softing_reset_chip(struct softing *card)
317 {
318 int ret;
319
320 do {
321 /* reset chip */
322 iowrite8(0, &card->dpram[DPRAM_RESET_RX_FIFO]);
323 iowrite8(0, &card->dpram[DPRAM_RESET_RX_FIFO+1]);
324 iowrite8(1, &card->dpram[DPRAM_RESET]);
325 iowrite8(0, &card->dpram[DPRAM_RESET+1]);
326
327 ret = softing_fct_cmd(card, 0, "reset_can");
328 if (!ret)
329 break;
330 if (signal_pending(current))
331 /* don't wait any longer */
332 break;
333 } while (1);
334 card->tx.pending = 0;
335 return ret;
336 }
337
softing_chip_poweron(struct softing * card)338 int softing_chip_poweron(struct softing *card)
339 {
340 int ret;
341 /* sync */
342 ret = _softing_fct_cmd(card, 99, 0x55, "sync-a");
343 if (ret < 0)
344 goto failed;
345
346 ret = _softing_fct_cmd(card, 99, 0xaa, "sync-b");
347 if (ret < 0)
348 goto failed;
349
350 ret = softing_reset_chip(card);
351 if (ret < 0)
352 goto failed;
353 /* get_serial */
354 ret = softing_fct_cmd(card, 43, "get_serial_number");
355 if (ret < 0)
356 goto failed;
357 card->id.serial = ioread32(&card->dpram[DPRAM_FCT_PARAM]);
358 /* get_version */
359 ret = softing_fct_cmd(card, 12, "get_version");
360 if (ret < 0)
361 goto failed;
362 card->id.fw_version = ioread16(&card->dpram[DPRAM_FCT_PARAM + 2]);
363 card->id.hw_version = ioread16(&card->dpram[DPRAM_FCT_PARAM + 4]);
364 card->id.license = ioread16(&card->dpram[DPRAM_FCT_PARAM + 6]);
365 card->id.chip[0] = ioread16(&card->dpram[DPRAM_FCT_PARAM + 8]);
366 card->id.chip[1] = ioread16(&card->dpram[DPRAM_FCT_PARAM + 10]);
367 return 0;
368 failed:
369 return ret;
370 }
371
softing_initialize_timestamp(struct softing * card)372 static void softing_initialize_timestamp(struct softing *card)
373 {
374 uint64_t ovf;
375
376 card->ts_ref = ktime_get();
377
378 /* 16MHz is the reference */
379 ovf = 0x100000000ULL * 16;
380 do_div(ovf, card->pdat->freq ?: 16);
381
382 card->ts_overflow = ktime_add_us(0, ovf);
383 }
384
softing_raw2ktime(struct softing * card,u32 raw)385 ktime_t softing_raw2ktime(struct softing *card, u32 raw)
386 {
387 uint64_t rawl;
388 ktime_t now, real_offset;
389 ktime_t target;
390 ktime_t tmp;
391
392 now = ktime_get();
393 real_offset = ktime_sub(ktime_get_real(), now);
394
395 /* find nsec from card */
396 rawl = raw * 16;
397 do_div(rawl, card->pdat->freq ?: 16);
398 target = ktime_add_us(card->ts_ref, rawl);
399 /* test for overflows */
400 tmp = ktime_add(target, card->ts_overflow);
401 while (unlikely(ktime_to_ns(tmp) > ktime_to_ns(now))) {
402 card->ts_ref = ktime_add(card->ts_ref, card->ts_overflow);
403 target = tmp;
404 tmp = ktime_add(target, card->ts_overflow);
405 }
406 return ktime_add(target, real_offset);
407 }
408
softing_error_reporting(struct net_device * netdev)409 static inline int softing_error_reporting(struct net_device *netdev)
410 {
411 struct softing_priv *priv = netdev_priv(netdev);
412
413 return (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
414 ? 1 : 0;
415 }
416
softing_startstop(struct net_device * dev,int up)417 int softing_startstop(struct net_device *dev, int up)
418 {
419 int ret;
420 struct softing *card;
421 struct softing_priv *priv;
422 struct net_device *netdev;
423 int bus_bitmask_start;
424 int j, error_reporting;
425 struct can_frame msg;
426 const struct can_bittiming *bt;
427
428 priv = netdev_priv(dev);
429 card = priv->card;
430
431 if (!card->fw.up)
432 return -EIO;
433
434 ret = mutex_lock_interruptible(&card->fw.lock);
435 if (ret)
436 return ret;
437
438 bus_bitmask_start = 0;
439 if (dev && up)
440 /* prepare to start this bus as well */
441 bus_bitmask_start |= (1 << priv->index);
442 /* bring netdevs down */
443 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
444 netdev = card->net[j];
445 if (!netdev)
446 continue;
447 priv = netdev_priv(netdev);
448
449 if (dev != netdev)
450 netif_stop_queue(netdev);
451
452 if (netif_running(netdev)) {
453 if (dev != netdev)
454 bus_bitmask_start |= (1 << j);
455 priv->tx.pending = 0;
456 priv->tx.echo_put = 0;
457 priv->tx.echo_get = 0;
458 /*
459 * this bus' may just have called open_candev()
460 * which is rather stupid to call close_candev()
461 * already
462 * but we may come here from busoff recovery too
463 * in which case the echo_skb _needs_ flushing too.
464 * just be sure to call open_candev() again
465 */
466 close_candev(netdev);
467 }
468 priv->can.state = CAN_STATE_STOPPED;
469 }
470 card->tx.pending = 0;
471
472 softing_enable_irq(card, 0);
473 ret = softing_reset_chip(card);
474 if (ret)
475 goto failed;
476 if (!bus_bitmask_start)
477 /* no buses to be brought up */
478 goto card_done;
479
480 if ((bus_bitmask_start & 1) && (bus_bitmask_start & 2)
481 && (softing_error_reporting(card->net[0])
482 != softing_error_reporting(card->net[1]))) {
483 dev_alert(&card->pdev->dev,
484 "err_reporting flag differs for buses\n");
485 goto invalid;
486 }
487 error_reporting = 0;
488 if (bus_bitmask_start & 1) {
489 netdev = card->net[0];
490 priv = netdev_priv(netdev);
491 error_reporting += softing_error_reporting(netdev);
492 /* init chip 1 */
493 bt = &priv->can.bittiming;
494 iowrite16(bt->brp, &card->dpram[DPRAM_FCT_PARAM + 2]);
495 iowrite16(bt->sjw, &card->dpram[DPRAM_FCT_PARAM + 4]);
496 iowrite16(bt->phase_seg1 + bt->prop_seg,
497 &card->dpram[DPRAM_FCT_PARAM + 6]);
498 iowrite16(bt->phase_seg2, &card->dpram[DPRAM_FCT_PARAM + 8]);
499 iowrite16((priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 1 : 0,
500 &card->dpram[DPRAM_FCT_PARAM + 10]);
501 ret = softing_fct_cmd(card, 1, "initialize_chip[0]");
502 if (ret < 0)
503 goto failed;
504 /* set mode */
505 iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 2]);
506 iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 4]);
507 ret = softing_fct_cmd(card, 3, "set_mode[0]");
508 if (ret < 0)
509 goto failed;
510 /* set filter */
511 /* 11bit id & mask */
512 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 2]);
513 iowrite16(0x07ff, &card->dpram[DPRAM_FCT_PARAM + 4]);
514 /* 29bit id.lo & mask.lo & id.hi & mask.hi */
515 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 6]);
516 iowrite16(0xffff, &card->dpram[DPRAM_FCT_PARAM + 8]);
517 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 10]);
518 iowrite16(0x1fff, &card->dpram[DPRAM_FCT_PARAM + 12]);
519 ret = softing_fct_cmd(card, 7, "set_filter[0]");
520 if (ret < 0)
521 goto failed;
522 /* set output control */
523 iowrite16(priv->output, &card->dpram[DPRAM_FCT_PARAM + 2]);
524 ret = softing_fct_cmd(card, 5, "set_output[0]");
525 if (ret < 0)
526 goto failed;
527 }
528 if (bus_bitmask_start & 2) {
529 netdev = card->net[1];
530 priv = netdev_priv(netdev);
531 error_reporting += softing_error_reporting(netdev);
532 /* init chip2 */
533 bt = &priv->can.bittiming;
534 iowrite16(bt->brp, &card->dpram[DPRAM_FCT_PARAM + 2]);
535 iowrite16(bt->sjw, &card->dpram[DPRAM_FCT_PARAM + 4]);
536 iowrite16(bt->phase_seg1 + bt->prop_seg,
537 &card->dpram[DPRAM_FCT_PARAM + 6]);
538 iowrite16(bt->phase_seg2, &card->dpram[DPRAM_FCT_PARAM + 8]);
539 iowrite16((priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 1 : 0,
540 &card->dpram[DPRAM_FCT_PARAM + 10]);
541 ret = softing_fct_cmd(card, 2, "initialize_chip[1]");
542 if (ret < 0)
543 goto failed;
544 /* set mode2 */
545 iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 2]);
546 iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 4]);
547 ret = softing_fct_cmd(card, 4, "set_mode[1]");
548 if (ret < 0)
549 goto failed;
550 /* set filter2 */
551 /* 11bit id & mask */
552 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 2]);
553 iowrite16(0x07ff, &card->dpram[DPRAM_FCT_PARAM + 4]);
554 /* 29bit id.lo & mask.lo & id.hi & mask.hi */
555 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 6]);
556 iowrite16(0xffff, &card->dpram[DPRAM_FCT_PARAM + 8]);
557 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 10]);
558 iowrite16(0x1fff, &card->dpram[DPRAM_FCT_PARAM + 12]);
559 ret = softing_fct_cmd(card, 8, "set_filter[1]");
560 if (ret < 0)
561 goto failed;
562 /* set output control2 */
563 iowrite16(priv->output, &card->dpram[DPRAM_FCT_PARAM + 2]);
564 ret = softing_fct_cmd(card, 6, "set_output[1]");
565 if (ret < 0)
566 goto failed;
567 }
568
569 /* enable_error_frame
570 *
571 * Error reporting is switched off at the moment since
572 * the receiving of them is not yet 100% verified
573 * This should be enabled sooner or later
574 */
575 if (0 && error_reporting) {
576 ret = softing_fct_cmd(card, 51, "enable_error_frame");
577 if (ret < 0)
578 goto failed;
579 }
580
581 /* initialize interface */
582 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 2]);
583 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 4]);
584 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 6]);
585 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 8]);
586 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 10]);
587 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 12]);
588 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 14]);
589 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 16]);
590 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 18]);
591 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 20]);
592 ret = softing_fct_cmd(card, 17, "initialize_interface");
593 if (ret < 0)
594 goto failed;
595 /* enable_fifo */
596 ret = softing_fct_cmd(card, 36, "enable_fifo");
597 if (ret < 0)
598 goto failed;
599 /* enable fifo tx ack */
600 ret = softing_fct_cmd(card, 13, "fifo_tx_ack[0]");
601 if (ret < 0)
602 goto failed;
603 /* enable fifo tx ack2 */
604 ret = softing_fct_cmd(card, 14, "fifo_tx_ack[1]");
605 if (ret < 0)
606 goto failed;
607 /* start_chip */
608 ret = softing_fct_cmd(card, 11, "start_chip");
609 if (ret < 0)
610 goto failed;
611 iowrite8(0, &card->dpram[DPRAM_INFO_BUSSTATE]);
612 iowrite8(0, &card->dpram[DPRAM_INFO_BUSSTATE2]);
613 if (card->pdat->generation < 2) {
614 iowrite8(0, &card->dpram[DPRAM_V2_IRQ_TOHOST]);
615 /* flush the DPRAM caches */
616 wmb();
617 }
618
619 softing_initialize_timestamp(card);
620
621 /*
622 * do socketcan notifications/status changes
623 * from here, no errors should occur, or the failed: part
624 * must be reviewed
625 */
626 memset(&msg, 0, sizeof(msg));
627 msg.can_id = CAN_ERR_FLAG | CAN_ERR_RESTARTED;
628 msg.len = CAN_ERR_DLC;
629 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
630 if (!(bus_bitmask_start & (1 << j)))
631 continue;
632 netdev = card->net[j];
633 if (!netdev)
634 continue;
635 priv = netdev_priv(netdev);
636 priv->can.state = CAN_STATE_ERROR_ACTIVE;
637 open_candev(netdev);
638 if (dev != netdev) {
639 /* notify other buses on the restart */
640 softing_netdev_rx(netdev, &msg, 0);
641 ++priv->can.can_stats.restarts;
642 }
643 netif_wake_queue(netdev);
644 }
645
646 /* enable interrupts */
647 ret = softing_enable_irq(card, 1);
648 if (ret)
649 goto failed;
650 card_done:
651 mutex_unlock(&card->fw.lock);
652 return 0;
653 invalid:
654 ret = -EINVAL;
655 failed:
656 softing_enable_irq(card, 0);
657 softing_reset_chip(card);
658 mutex_unlock(&card->fw.lock);
659 /* bring all other interfaces down */
660 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
661 netdev = card->net[j];
662 if (!netdev)
663 continue;
664 dev_close(netdev);
665 }
666 return ret;
667 }
668
softing_default_output(struct net_device * netdev)669 int softing_default_output(struct net_device *netdev)
670 {
671 struct softing_priv *priv = netdev_priv(netdev);
672 struct softing *card = priv->card;
673
674 switch (priv->chip) {
675 case 1000:
676 return (card->pdat->generation < 2) ? 0xfb : 0xfa;
677 case 5:
678 return 0x60;
679 default:
680 return 0x40;
681 }
682 }
683