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sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched...
[mirror_ubuntu-artful-kernel.git] / drivers / net / can / softing / softing_fw.c
CommitLineData
03fd3cf5
KVD		 1/*
2 * Copyright (C) 2008-2010
3 *
4 * - Kurt Van Dijck, EIA Electronics
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the version 2 of the GNU General Public License
8 * as published by the Free Software Foundation
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
05780d98 16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
03fd3cf5
KVD		 17 */
18
19#include <linux/firmware.h>
174cd4b1 20#include <linux/sched/signal.h>
03fd3cf5 21#include <asm/div64.h>
b7f080cf 22#include <asm/io.h>
03fd3cf5
KVD		 23
24#include "softing.h"
25
26/*
27 * low level DPRAM command.
28 * Make sure that card->dpram[DPRAM_FCT_HOST] is preset
29 */
30static int _softing_fct_cmd(struct softing *card, int16_t cmd, uint16_t vector,
31 const char *msg)
32{
33 int ret;
34 unsigned long stamp;
35
36 iowrite16(cmd, &card->dpram[DPRAM_FCT_PARAM]);
37 iowrite8(vector >> 8, &card->dpram[DPRAM_FCT_HOST + 1]);
38 iowrite8(vector, &card->dpram[DPRAM_FCT_HOST]);
39 /* be sure to flush this to the card */
40 wmb();
41 stamp = jiffies + 1 * HZ;
42 /* wait for card */
43 do {
44 /* DPRAM_FCT_HOST is _not_ aligned */
45 ret = ioread8(&card->dpram[DPRAM_FCT_HOST]) +
46 (ioread8(&card->dpram[DPRAM_FCT_HOST + 1]) << 8);
47 /* don't have any cached variables */
48 rmb();
49 if (ret == RES_OK)
50 /* read return-value now */
51 return ioread16(&card->dpram[DPRAM_FCT_RESULT]);
52
53 if ((ret != vector) || time_after(jiffies, stamp))
54 break;
55 /* process context => relax */
56 usleep_range(500, 10000);
57 } while (1);
58
59 ret = (ret == RES_NONE) ? -ETIMEDOUT : -ECANCELED;
60 dev_alert(&card->pdev->dev, "firmware %s failed (%i)\n", msg, ret);
61 return ret;
62}
63
64static int softing_fct_cmd(struct softing *card, int16_t cmd, const char *msg)
65{
66 int ret;
67
68 ret = _softing_fct_cmd(card, cmd, 0, msg);
69 if (ret > 0) {
70 dev_alert(&card->pdev->dev, "%s returned %u\n", msg, ret);
71 ret = -EIO;
72 }
73 return ret;
74}
75
76int softing_bootloader_command(struct softing *card, int16_t cmd,
77 const char *msg)
78{
79 int ret;
80 unsigned long stamp;
81
82 iowrite16(RES_NONE, &card->dpram[DPRAM_RECEIPT]);
83 iowrite16(cmd, &card->dpram[DPRAM_COMMAND]);
84 /* be sure to flush this to the card */
85 wmb();
86 stamp = jiffies + 3 * HZ;
87 /* wait for card */
88 do {
89 ret = ioread16(&card->dpram[DPRAM_RECEIPT]);
90 /* don't have any cached variables */
91 rmb();
92 if (ret == RES_OK)
93 return 0;
94 if (time_after(jiffies, stamp))
95 break;
96 /* process context => relax */
97 usleep_range(500, 10000);
98 } while (!signal_pending(current));
99
100 ret = (ret == RES_NONE) ? -ETIMEDOUT : -ECANCELED;
101 dev_alert(&card->pdev->dev, "bootloader %s failed (%i)\n", msg, ret);
102 return ret;
103}
104
105static int fw_parse(const uint8_t **pmem, uint16_t *ptype, uint32_t *paddr,
106 uint16_t *plen, const uint8_t **pdat)
107{
108 uint16_t checksum[2];
109 const uint8_t *mem;
110 const uint8_t *end;
111
112 /*
113 * firmware records are a binary, unaligned stream composed of:
114 * uint16_t type;
115 * uint32_t addr;
116 * uint16_t len;
117 * uint8_t dat[len];
118 * uint16_t checksum;
119 * all values in little endian.
120 * We could define a struct for this, with __attribute__((packed)),
121 * but would that solve the alignment in _all_ cases (cfr. the
122 * struct itself may be an odd address)?
123 *
124 * I chose to use leXX_to_cpup() since this solves both
125 * endianness & alignment.
126 */
127 mem = *pmem;
128 *ptype = le16_to_cpup((void *)&mem[0]);
129 *paddr = le32_to_cpup((void *)&mem[2]);
130 *plen = le16_to_cpup((void *)&mem[6]);
131 *pdat = &mem[8];
132 /* verify checksum */
133 end = &mem[8 + *plen];
134 checksum[0] = le16_to_cpup((void *)end);
135 for (checksum[1] = 0; mem < end; ++mem)
136 checksum[1] += *mem;
137 if (checksum[0] != checksum[1])
138 return -EINVAL;
139 /* increment */
140 *pmem += 10 + *plen;
141 return 0;
142}
143
144int softing_load_fw(const char *file, struct softing *card,
145 __iomem uint8_t *dpram, unsigned int size, int offset)
146{
147 const struct firmware *fw;
148 int ret;
149 const uint8_t *mem, *end, *dat;
150 uint16_t type, len;
151 uint32_t addr;
ef813c41 152 uint8_t *buf = NULL, *new_buf;
03fd3cf5
KVD		 153 int buflen = 0;
154 int8_t type_end = 0;
155
156 ret = request_firmware(&fw, file, &card->pdev->dev);
157 if (ret < 0)
158 return ret;
159 dev_dbg(&card->pdev->dev, "%s, firmware(%s) got %u bytes"
160 ", offset %c0x%04x\n",
161 card->pdat->name, file, (unsigned int)fw->size,
162 (offset >= 0) ? '+' : '-', (unsigned int)abs(offset));
163 /* parse the firmware */
164 mem = fw->data;
165 end = &mem[fw->size];
166 /* look for header record */
167 ret = fw_parse(&mem, &type, &addr, &len, &dat);
168 if (ret < 0)
169 goto failed;
170 if (type != 0xffff)
171 goto failed;
172 if (strncmp("Structured Binary Format, Softing GmbH" , dat, len)) {
173 ret = -EINVAL;
174 goto failed;
175 }
176 /* ok, we had a header */
177 while (mem < end) {
178 ret = fw_parse(&mem, &type, &addr, &len, &dat);
179 if (ret < 0)
180 goto failed;
181 if (type == 3) {
182 /* start address, not used here */
183 continue;
184 } else if (type == 1) {
185 /* eof */
186 type_end = 1;
187 break;
188 } else if (type != 0) {
189 ret = -EINVAL;
190 goto failed;
191 }
192
193 if ((addr + len + offset) > size)
194 goto failed;
195 memcpy_toio(&dpram[addr + offset], dat, len);
196 /* be sure to flush caches from IO space */
197 mb();
198 if (len > buflen) {
199 /* align buflen */
200 buflen = (len + (1024-1)) & ~(1024-1);
ef813c41
AK		 201 new_buf = krealloc(buf, buflen, GFP_KERNEL);
202 if (!new_buf) {
03fd3cf5
KVD		 203 ret = -ENOMEM;
204 goto failed;
205 }
ef813c41 206 buf = new_buf;
03fd3cf5
KVD		 207 }
208 /* verify record data */
209 memcpy_fromio(buf, &dpram[addr + offset], len);
210 if (memcmp(buf, dat, len)) {
211 /* is not ok */
212 dev_alert(&card->pdev->dev, "DPRAM readback failed\n");
213 ret = -EIO;
214 goto failed;
215 }
216 }
217 if (!type_end)
218 /* no end record seen */
219 goto failed;
220 ret = 0;
221failed:
222 kfree(buf);
223 release_firmware(fw);
224 if (ret < 0)
225 dev_info(&card->pdev->dev, "firmware %s failed\n", file);
226 return ret;
227}
228
229int softing_load_app_fw(const char *file, struct softing *card)
230{
231 const struct firmware *fw;
232 const uint8_t *mem, *end, *dat;
233 int ret, j;
234 uint16_t type, len;
235 uint32_t addr, start_addr = 0;
236 unsigned int sum, rx_sum;
237 int8_t type_end = 0, type_entrypoint = 0;
238
239 ret = request_firmware(&fw, file, &card->pdev->dev);
240 if (ret) {
241 dev_alert(&card->pdev->dev, "request_firmware(%s) got %i\n",
242 file, ret);
243 return ret;
244 }
245 dev_dbg(&card->pdev->dev, "firmware(%s) got %lu bytes\n",
246 file, (unsigned long)fw->size);
247 /* parse the firmware */
248 mem = fw->data;
249 end = &mem[fw->size];
250 /* look for header record */
251 ret = fw_parse(&mem, &type, &addr, &len, &dat);
252 if (ret)
253 goto failed;
254 ret = -EINVAL;
255 if (type != 0xffff) {
256 dev_alert(&card->pdev->dev, "firmware starts with type 0x%x\n",
257 type);
258 goto failed;
259 }
260 if (strncmp("Structured Binary Format, Softing GmbH", dat, len)) {
261 dev_alert(&card->pdev->dev, "firmware string '%.*s' fault\n",
262 len, dat);
263 goto failed;
264 }
265 /* ok, we had a header */
266 while (mem < end) {
267 ret = fw_parse(&mem, &type, &addr, &len, &dat);
268 if (ret)
269 goto failed;
270
271 if (type == 3) {
272 /* start address */
273 start_addr = addr;
274 type_entrypoint = 1;
275 continue;
276 } else if (type == 1) {
277 /* eof */
278 type_end = 1;
279 break;
280 } else if (type != 0) {
281 dev_alert(&card->pdev->dev,
282 "unknown record type 0x%04x\n", type);
283 ret = -EINVAL;
284 goto failed;
285 }
286
287 /* regualar data */
288 for (sum = 0, j = 0; j < len; ++j)
289 sum += dat[j];
290 /* work in 16bit (target) */
291 sum &= 0xffff;
292
293 memcpy_toio(&card->dpram[card->pdat->app.offs], dat, len);
294 iowrite32(card->pdat->app.offs + card->pdat->app.addr,
295 &card->dpram[DPRAM_COMMAND + 2]);
296 iowrite32(addr, &card->dpram[DPRAM_COMMAND + 6]);
297 iowrite16(len, &card->dpram[DPRAM_COMMAND + 10]);
298 iowrite8(1, &card->dpram[DPRAM_COMMAND + 12]);
299 ret = softing_bootloader_command(card, 1, "loading app.");
300 if (ret < 0)
301 goto failed;
302 /* verify checksum */
303 rx_sum = ioread16(&card->dpram[DPRAM_RECEIPT + 2]);
304 if (rx_sum != sum) {
305 dev_alert(&card->pdev->dev, "SRAM seems to be damaged"
306 ", wanted 0x%04x, got 0x%04x\n", sum, rx_sum);
307 ret = -EIO;
308 goto failed;
309 }
310 }
311 if (!type_end || !type_entrypoint)
312 goto failed;
313 /* start application in card */
314 iowrite32(start_addr, &card->dpram[DPRAM_COMMAND + 2]);
315 iowrite8(1, &card->dpram[DPRAM_COMMAND + 6]);
316 ret = softing_bootloader_command(card, 3, "start app.");
317 if (ret < 0)
318 goto failed;
319 ret = 0;
320failed:
321 release_firmware(fw);
322 if (ret < 0)
323 dev_info(&card->pdev->dev, "firmware %s failed\n", file);
324 return ret;
325}
326
327static int softing_reset_chip(struct softing *card)
328{
329 int ret;
330
331 do {
332 /* reset chip */
333 iowrite8(0, &card->dpram[DPRAM_RESET_RX_FIFO]);
334 iowrite8(0, &card->dpram[DPRAM_RESET_RX_FIFO+1]);
335 iowrite8(1, &card->dpram[DPRAM_RESET]);
336 iowrite8(0, &card->dpram[DPRAM_RESET+1]);
337
338 ret = softing_fct_cmd(card, 0, "reset_can");
339 if (!ret)
340 break;
341 if (signal_pending(current))
342 /* don't wait any longer */
343 break;
344 } while (1);
345 card->tx.pending = 0;
346 return ret;
347}
348
349int softing_chip_poweron(struct softing *card)
350{
351 int ret;
352 /* sync */
353 ret = _softing_fct_cmd(card, 99, 0x55, "sync-a");
354 if (ret < 0)
355 goto failed;
356
357 ret = _softing_fct_cmd(card, 99, 0xaa, "sync-b");
358 if (ret < 0)
359 goto failed;
360
361 ret = softing_reset_chip(card);
362 if (ret < 0)
363 goto failed;
364 /* get_serial */
365 ret = softing_fct_cmd(card, 43, "get_serial_number");
366 if (ret < 0)
367 goto failed;
368 card->id.serial = ioread32(&card->dpram[DPRAM_FCT_PARAM]);
369 /* get_version */
370 ret = softing_fct_cmd(card, 12, "get_version");
371 if (ret < 0)
372 goto failed;
373 card->id.fw_version = ioread16(&card->dpram[DPRAM_FCT_PARAM + 2]);
374 card->id.hw_version = ioread16(&card->dpram[DPRAM_FCT_PARAM + 4]);
375 card->id.license = ioread16(&card->dpram[DPRAM_FCT_PARAM + 6]);
376 card->id.chip[0] = ioread16(&card->dpram[DPRAM_FCT_PARAM + 8]);
377 card->id.chip[1] = ioread16(&card->dpram[DPRAM_FCT_PARAM + 10]);
378 return 0;
379failed:
380 return ret;
381}
382
383static void softing_initialize_timestamp(struct softing *card)
384{
385 uint64_t ovf;
386
387 card->ts_ref = ktime_get();
388
389 /* 16MHz is the reference */
390 ovf = 0x100000000ULL * 16;
391 do_div(ovf, card->pdat->freq ?: 16);
392
8b0e1953 393 card->ts_overflow = ktime_add_us(0, ovf);
03fd3cf5
KVD		 394}
395
396ktime_t softing_raw2ktime(struct softing *card, u32 raw)
397{
398 uint64_t rawl;
399 ktime_t now, real_offset;
400 ktime_t target;
401 ktime_t tmp;
402
403 now = ktime_get();
404 real_offset = ktime_sub(ktime_get_real(), now);
405
406 /* find nsec from card */
407 rawl = raw * 16;
408 do_div(rawl, card->pdat->freq ?: 16);
409 target = ktime_add_us(card->ts_ref, rawl);
410 /* test for overflows */
411 tmp = ktime_add(target, card->ts_overflow);
412 while (unlikely(ktime_to_ns(tmp) > ktime_to_ns(now))) {
413 card->ts_ref = ktime_add(card->ts_ref, card->ts_overflow);
414 target = tmp;
415 tmp = ktime_add(target, card->ts_overflow);
416 }
417 return ktime_add(target, real_offset);
418}
419
420static inline int softing_error_reporting(struct net_device *netdev)
421{
422 struct softing_priv *priv = netdev_priv(netdev);
423
424 return (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
425 ? 1 : 0;
426}
427
428int softing_startstop(struct net_device *dev, int up)
429{
430 int ret;
431 struct softing *card;
432 struct softing_priv *priv;
433 struct net_device *netdev;
434 int bus_bitmask_start;
435 int j, error_reporting;
436 struct can_frame msg;
437 const struct can_bittiming *bt;
438
439 priv = netdev_priv(dev);
440 card = priv->card;
441
442 if (!card->fw.up)
443 return -EIO;
444
445 ret = mutex_lock_interruptible(&card->fw.lock);
446 if (ret)
447 return ret;
448
449 bus_bitmask_start = 0;
450 if (dev && up)
451 /* prepare to start this bus as well */
452 bus_bitmask_start |= (1 << priv->index);
453 /* bring netdevs down */
454 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
455 netdev = card->net[j];
456 if (!netdev)
457 continue;
458 priv = netdev_priv(netdev);
459
460 if (dev != netdev)
461 netif_stop_queue(netdev);
462
463 if (netif_running(netdev)) {
464 if (dev != netdev)
465 bus_bitmask_start |= (1 << j);
466 priv->tx.pending = 0;
467 priv->tx.echo_put = 0;
468 priv->tx.echo_get = 0;
469 /*
470 * this bus' may just have called open_candev()
471 * which is rather stupid to call close_candev()
472 * already
473 * but we may come here from busoff recovery too
474 * in which case the echo_skb _needs_ flushing too.
475 * just be sure to call open_candev() again
476 */
477 close_candev(netdev);
478 }
479 priv->can.state = CAN_STATE_STOPPED;
480 }
481 card->tx.pending = 0;
482
483 softing_enable_irq(card, 0);
484 ret = softing_reset_chip(card);
485 if (ret)
486 goto failed;
487 if (!bus_bitmask_start)
488 /* no busses to be brought up */
489 goto card_done;
490
491 if ((bus_bitmask_start & 1) && (bus_bitmask_start & 2)
492 && (softing_error_reporting(card->net[0])
493 != softing_error_reporting(card->net[1]))) {
494 dev_alert(&card->pdev->dev,
495 "err_reporting flag differs for busses\n");
496 goto invalid;
497 }
498 error_reporting = 0;
499 if (bus_bitmask_start & 1) {
500 netdev = card->net[0];
501 priv = netdev_priv(netdev);
502 error_reporting += softing_error_reporting(netdev);
503 /* init chip 1 */
504 bt = &priv->can.bittiming;
505 iowrite16(bt->brp, &card->dpram[DPRAM_FCT_PARAM + 2]);
506 iowrite16(bt->sjw, &card->dpram[DPRAM_FCT_PARAM + 4]);
507 iowrite16(bt->phase_seg1 + bt->prop_seg,
508 &card->dpram[DPRAM_FCT_PARAM + 6]);
509 iowrite16(bt->phase_seg2, &card->dpram[DPRAM_FCT_PARAM + 8]);
510 iowrite16((priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 1 : 0,
511 &card->dpram[DPRAM_FCT_PARAM + 10]);
512 ret = softing_fct_cmd(card, 1, "initialize_chip[0]");
513 if (ret < 0)
514 goto failed;
515 /* set mode */
516 iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 2]);
517 iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 4]);
518 ret = softing_fct_cmd(card, 3, "set_mode[0]");
519 if (ret < 0)
520 goto failed;
521 /* set filter */
522 /* 11bit id & mask */
523 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 2]);
524 iowrite16(0x07ff, &card->dpram[DPRAM_FCT_PARAM + 4]);
525 /* 29bit id.lo & mask.lo & id.hi & mask.hi */
526 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 6]);
527 iowrite16(0xffff, &card->dpram[DPRAM_FCT_PARAM + 8]);
528 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 10]);
529 iowrite16(0x1fff, &card->dpram[DPRAM_FCT_PARAM + 12]);
530 ret = softing_fct_cmd(card, 7, "set_filter[0]");
531 if (ret < 0)
532 goto failed;
533 /* set output control */
534 iowrite16(priv->output, &card->dpram[DPRAM_FCT_PARAM + 2]);
535 ret = softing_fct_cmd(card, 5, "set_output[0]");
536 if (ret < 0)
537 goto failed;
538 }
539 if (bus_bitmask_start & 2) {
540 netdev = card->net[1];
541 priv = netdev_priv(netdev);
542 error_reporting += softing_error_reporting(netdev);
543 /* init chip2 */
544 bt = &priv->can.bittiming;
545 iowrite16(bt->brp, &card->dpram[DPRAM_FCT_PARAM + 2]);
546 iowrite16(bt->sjw, &card->dpram[DPRAM_FCT_PARAM + 4]);
547 iowrite16(bt->phase_seg1 + bt->prop_seg,
548 &card->dpram[DPRAM_FCT_PARAM + 6]);
549 iowrite16(bt->phase_seg2, &card->dpram[DPRAM_FCT_PARAM + 8]);
550 iowrite16((priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 1 : 0,
551 &card->dpram[DPRAM_FCT_PARAM + 10]);
552 ret = softing_fct_cmd(card, 2, "initialize_chip[1]");
553 if (ret < 0)
554 goto failed;
555 /* set mode2 */
556 iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 2]);
557 iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 4]);
558 ret = softing_fct_cmd(card, 4, "set_mode[1]");
559 if (ret < 0)
560 goto failed;
561 /* set filter2 */
562 /* 11bit id & mask */
563 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 2]);
564 iowrite16(0x07ff, &card->dpram[DPRAM_FCT_PARAM + 4]);
565 /* 29bit id.lo & mask.lo & id.hi & mask.hi */
566 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 6]);
567 iowrite16(0xffff, &card->dpram[DPRAM_FCT_PARAM + 8]);
568 iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 10]);
569 iowrite16(0x1fff, &card->dpram[DPRAM_FCT_PARAM + 12]);
570 ret = softing_fct_cmd(card, 8, "set_filter[1]");
571 if (ret < 0)
572 goto failed;
573 /* set output control2 */
574 iowrite16(priv->output, &card->dpram[DPRAM_FCT_PARAM + 2]);
575 ret = softing_fct_cmd(card, 6, "set_output[1]");
576 if (ret < 0)
577 goto failed;
578 }
579 /* enable_error_frame */
580 /*
581 * Error reporting is switched off at the moment since
582 * the receiving of them is not yet 100% verified
583 * This should be enabled sooner or later
584 *
585 if (error_reporting) {
586 ret = softing_fct_cmd(card, 51, "enable_error_frame");
587 if (ret < 0)
588 goto failed;
589 }
590 */
591 /* initialize interface */
592 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 2]);
593 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 4]);
594 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 6]);
595 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 8]);
596 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 10]);
597 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 12]);
598 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 14]);
599 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 16]);
600 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 18]);
601 iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 20]);
602 ret = softing_fct_cmd(card, 17, "initialize_interface");
603 if (ret < 0)
604 goto failed;
605 /* enable_fifo */
606 ret = softing_fct_cmd(card, 36, "enable_fifo");
607 if (ret < 0)
608 goto failed;
609 /* enable fifo tx ack */
610 ret = softing_fct_cmd(card, 13, "fifo_tx_ack[0]");
611 if (ret < 0)
612 goto failed;
613 /* enable fifo tx ack2 */
614 ret = softing_fct_cmd(card, 14, "fifo_tx_ack[1]");
615 if (ret < 0)
616 goto failed;
617 /* start_chip */
618 ret = softing_fct_cmd(card, 11, "start_chip");
619 if (ret < 0)
620 goto failed;
621 iowrite8(0, &card->dpram[DPRAM_INFO_BUSSTATE]);
622 iowrite8(0, &card->dpram[DPRAM_INFO_BUSSTATE2]);
623 if (card->pdat->generation < 2) {
624 iowrite8(0, &card->dpram[DPRAM_V2_IRQ_TOHOST]);
625 /* flush the DPRAM caches */
626 wmb();
627 }
628
629 softing_initialize_timestamp(card);
630
631 /*
632 * do socketcan notifications/status changes
633 * from here, no errors should occur, or the failed: part
634 * must be reviewed
635 */
636 memset(&msg, 0, sizeof(msg));
637 msg.can_id = CAN_ERR_FLAG | CAN_ERR_RESTARTED;
638 msg.can_dlc = CAN_ERR_DLC;
639 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
640 if (!(bus_bitmask_start & (1 << j)))
641 continue;
642 netdev = card->net[j];
643 if (!netdev)
644 continue;
645 priv = netdev_priv(netdev);
646 priv->can.state = CAN_STATE_ERROR_ACTIVE;
647 open_candev(netdev);
648 if (dev != netdev) {
649 /* notify other busses on the restart */
8b0e1953 650 softing_netdev_rx(netdev, &msg, 0);
03fd3cf5
KVD		 651 ++priv->can.can_stats.restarts;
652 }
653 netif_wake_queue(netdev);
654 }
655
656 /* enable interrupts */
657 ret = softing_enable_irq(card, 1);
658 if (ret)
659 goto failed;
660card_done:
661 mutex_unlock(&card->fw.lock);
662 return 0;
663invalid:
664 ret = -EINVAL;
665failed:
666 softing_enable_irq(card, 0);
667 softing_reset_chip(card);
668 mutex_unlock(&card->fw.lock);
669 /* bring all other interfaces down */
670 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
671 netdev = card->net[j];
672 if (!netdev)
673 continue;
674 dev_close(netdev);
675 }
676 return ret;
677}
678
679int softing_default_output(struct net_device *netdev)
680{
681 struct softing_priv *priv = netdev_priv(netdev);
682 struct softing *card = priv->card;
683
684 switch (priv->chip) {
685 case 1000:
686 return (card->pdat->generation < 2) ? 0xfb : 0xfa;
687 case 5:
688 return 0x60;
689 default:
690 return 0x40;
691 }
692}
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