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8#include <linux/module.h>
9#include <linux/interrupt.h>
10#include <asm/io.h>
11
12#include "softing.h"
13
14#define TX_ECHO_SKB_MAX (((TXMAX+1)/2)-1)
15
16
17
18
19
20static inline int canif_is_active(struct net_device *netdev)
21{
22 struct can_priv *can = netdev_priv(netdev);
23
24 if (!netif_running(netdev))
25 return 0;
26 return (can->state <= CAN_STATE_ERROR_PASSIVE);
27}
28
29
30static inline void softing_set_reset_dpram(struct softing *card)
31{
32 if (card->pdat->generation >= 2) {
33 spin_lock_bh(&card->spin);
34 iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) & ~1,
35 &card->dpram[DPRAM_V2_RESET]);
36 spin_unlock_bh(&card->spin);
37 }
38}
39
40static inline void softing_clr_reset_dpram(struct softing *card)
41{
42 if (card->pdat->generation >= 2) {
43 spin_lock_bh(&card->spin);
44 iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) | 1,
45 &card->dpram[DPRAM_V2_RESET]);
46 spin_unlock_bh(&card->spin);
47 }
48}
49
50
51static netdev_tx_t softing_netdev_start_xmit(struct sk_buff *skb,
52 struct net_device *dev)
53{
54 struct softing_priv *priv = netdev_priv(dev);
55 struct softing *card = priv->card;
56 int ret;
57 uint8_t *ptr;
58 uint8_t fifo_wr, fifo_rd;
59 struct can_frame *cf = (struct can_frame *)skb->data;
60 uint8_t buf[DPRAM_TX_SIZE];
61
62 if (can_dropped_invalid_skb(dev, skb))
63 return NETDEV_TX_OK;
64
65 spin_lock(&card->spin);
66
67 ret = NETDEV_TX_BUSY;
68 if (!card->fw.up ||
69 (card->tx.pending >= TXMAX) ||
70 (priv->tx.pending >= TX_ECHO_SKB_MAX))
71 goto xmit_done;
72 fifo_wr = ioread8(&card->dpram[DPRAM_TX_WR]);
73 fifo_rd = ioread8(&card->dpram[DPRAM_TX_RD]);
74 if (fifo_wr == fifo_rd)
75
76 goto xmit_done;
77 memset(buf, 0, sizeof(buf));
78 ptr = buf;
79 *ptr = CMD_TX;
80 if (cf->can_id & CAN_RTR_FLAG)
81 *ptr |= CMD_RTR;
82 if (cf->can_id & CAN_EFF_FLAG)
83 *ptr |= CMD_XTD;
84 if (priv->index)
85 *ptr |= CMD_BUS2;
86 ++ptr;
87 *ptr++ = cf->len;
88 *ptr++ = (cf->can_id >> 0);
89 *ptr++ = (cf->can_id >> 8);
90 if (cf->can_id & CAN_EFF_FLAG) {
91 *ptr++ = (cf->can_id >> 16);
92 *ptr++ = (cf->can_id >> 24);
93 } else {
94
95 ptr += 1;
96 }
97 if (!(cf->can_id & CAN_RTR_FLAG))
98 memcpy(ptr, &cf->data[0], cf->len);
99 memcpy_toio(&card->dpram[DPRAM_TX + DPRAM_TX_SIZE * fifo_wr],
100 buf, DPRAM_TX_SIZE);
101 if (++fifo_wr >= DPRAM_TX_CNT)
102 fifo_wr = 0;
103 iowrite8(fifo_wr, &card->dpram[DPRAM_TX_WR]);
104 card->tx.last_bus = priv->index;
105 ++card->tx.pending;
106 ++priv->tx.pending;
107 can_put_echo_skb(skb, dev, priv->tx.echo_put, 0);
108 ++priv->tx.echo_put;
109 if (priv->tx.echo_put >= TX_ECHO_SKB_MAX)
110 priv->tx.echo_put = 0;
111
112 ret = NETDEV_TX_OK;
113xmit_done:
114 spin_unlock(&card->spin);
115 if (card->tx.pending >= TXMAX) {
116 int j;
117 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
118 if (card->net[j])
119 netif_stop_queue(card->net[j]);
120 }
121 }
122 if (ret != NETDEV_TX_OK)
123 netif_stop_queue(dev);
124
125 return ret;
126}
127
128
129
130
131int softing_netdev_rx(struct net_device *netdev, const struct can_frame *msg,
132 ktime_t ktime)
133{
134 struct sk_buff *skb;
135 struct can_frame *cf;
136
137 skb = alloc_can_skb(netdev, &cf);
138 if (!skb)
139 return -ENOMEM;
140 memcpy(cf, msg, sizeof(*msg));
141 skb->tstamp = ktime;
142 return netif_rx(skb);
143}
144
145
146
147
148
149static int softing_handle_1(struct softing *card)
150{
151 struct net_device *netdev;
152 struct softing_priv *priv;
153 ktime_t ktime;
154 struct can_frame msg;
155 int cnt = 0, lost_msg;
156 uint8_t fifo_rd, fifo_wr, cmd;
157 uint8_t *ptr;
158 uint32_t tmp_u32;
159 uint8_t buf[DPRAM_RX_SIZE];
160
161 memset(&msg, 0, sizeof(msg));
162
163 lost_msg = ioread8(&card->dpram[DPRAM_RX_LOST]);
164 if (lost_msg) {
165 int j;
166
167 iowrite8(0, &card->dpram[DPRAM_RX_LOST]);
168
169 msg.can_id = CAN_ERR_FLAG | CAN_ERR_CRTL;
170 msg.len = CAN_ERR_DLC;
171 msg.data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
172
173
174
175
176 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
177 netdev = card->net[j];
178 if (!netdev)
179 continue;
180 if (!canif_is_active(netdev))
181
182 continue;
183 ++netdev->stats.rx_over_errors;
184 softing_netdev_rx(netdev, &msg, 0);
185 }
186
187 memset(&msg, 0, sizeof(msg));
188 ++cnt;
189 }
190
191 fifo_rd = ioread8(&card->dpram[DPRAM_RX_RD]);
192 fifo_wr = ioread8(&card->dpram[DPRAM_RX_WR]);
193
194 if (++fifo_rd >= DPRAM_RX_CNT)
195 fifo_rd = 0;
196 if (fifo_wr == fifo_rd)
197 return cnt;
198
199 memcpy_fromio(buf, &card->dpram[DPRAM_RX + DPRAM_RX_SIZE*fifo_rd],
200 DPRAM_RX_SIZE);
201 mb();
202
203 iowrite8(fifo_rd, &card->dpram[DPRAM_RX_RD]);
204
205 ptr = buf;
206 cmd = *ptr++;
207 if (cmd == 0xff)
208
209 return 0;
210 netdev = card->net[0];
211 if (cmd & CMD_BUS2)
212 netdev = card->net[1];
213 priv = netdev_priv(netdev);
214
215 if (cmd & CMD_ERR) {
216 uint8_t can_state, state;
217
218 state = *ptr++;
219
220 msg.can_id = CAN_ERR_FLAG;
221 msg.len = CAN_ERR_DLC;
222
223 if (state & SF_MASK_BUSOFF) {
224 can_state = CAN_STATE_BUS_OFF;
225 msg.can_id |= CAN_ERR_BUSOFF;
226 state = STATE_BUSOFF;
227 } else if (state & SF_MASK_EPASSIVE) {
228 can_state = CAN_STATE_ERROR_PASSIVE;
229 msg.can_id |= CAN_ERR_CRTL;
230 msg.data[1] = CAN_ERR_CRTL_TX_PASSIVE;
231 state = STATE_EPASSIVE;
232 } else {
233 can_state = CAN_STATE_ERROR_ACTIVE;
234 msg.can_id |= CAN_ERR_CRTL;
235 state = STATE_EACTIVE;
236 }
237
238 iowrite8(state, &card->dpram[priv->index ?
239 DPRAM_INFO_BUSSTATE2 : DPRAM_INFO_BUSSTATE]);
240
241 tmp_u32 = le32_to_cpup((void *)ptr);
242 ktime = softing_raw2ktime(card, tmp_u32);
243
244 ++netdev->stats.rx_errors;
245
246 if (can_state != priv->can.state) {
247 priv->can.state = can_state;
248 if (can_state == CAN_STATE_ERROR_PASSIVE)
249 ++priv->can.can_stats.error_passive;
250 else if (can_state == CAN_STATE_BUS_OFF) {
251
252 ++priv->can.can_stats.bus_off;
253 can_bus_off(netdev);
254 netif_stop_queue(netdev);
255 }
256
257 softing_netdev_rx(netdev, &msg, ktime);
258 }
259
260 } else {
261 if (cmd & CMD_RTR)
262 msg.can_id |= CAN_RTR_FLAG;
263 msg.len = can_cc_dlc2len(*ptr++);
264 if (cmd & CMD_XTD) {
265 msg.can_id |= CAN_EFF_FLAG;
266 msg.can_id |= le32_to_cpup((void *)ptr);
267 ptr += 4;
268 } else {
269 msg.can_id |= le16_to_cpup((void *)ptr);
270 ptr += 2;
271 }
272
273 tmp_u32 = le32_to_cpup((void *)ptr);
274 ptr += 4;
275 ktime = softing_raw2ktime(card, tmp_u32);
276 if (!(msg.can_id & CAN_RTR_FLAG))
277 memcpy(&msg.data[0], ptr, 8);
278
279 if (cmd & CMD_ACK) {
280
281 struct sk_buff *skb;
282 skb = priv->can.echo_skb[priv->tx.echo_get];
283 if (skb)
284 skb->tstamp = ktime;
285 ++netdev->stats.tx_packets;
286 netdev->stats.tx_bytes +=
287 can_get_echo_skb(netdev, priv->tx.echo_get,
288 NULL);
289 ++priv->tx.echo_get;
290 if (priv->tx.echo_get >= TX_ECHO_SKB_MAX)
291 priv->tx.echo_get = 0;
292 if (priv->tx.pending)
293 --priv->tx.pending;
294 if (card->tx.pending)
295 --card->tx.pending;
296 } else {
297 int ret;
298
299 ret = softing_netdev_rx(netdev, &msg, ktime);
300 if (ret == NET_RX_SUCCESS) {
301 ++netdev->stats.rx_packets;
302 if (!(msg.can_id & CAN_RTR_FLAG))
303 netdev->stats.rx_bytes += msg.len;
304 } else {
305 ++netdev->stats.rx_dropped;
306 }
307 }
308 }
309 ++cnt;
310 return cnt;
311}
312
313
314
315
316static irqreturn_t softing_irq_thread(int irq, void *dev_id)
317{
318 struct softing *card = (struct softing *)dev_id;
319 struct net_device *netdev;
320 struct softing_priv *priv;
321 int j, offset, work_done;
322
323 work_done = 0;
324 spin_lock_bh(&card->spin);
325 while (softing_handle_1(card) > 0) {
326 ++card->irq.svc_count;
327 ++work_done;
328 }
329 spin_unlock_bh(&card->spin);
330
331 offset = card->tx.last_bus;
332 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
333 if (card->tx.pending >= TXMAX)
334 break;
335 netdev = card->net[(j + offset + 1) % card->pdat->nbus];
336 if (!netdev)
337 continue;
338 priv = netdev_priv(netdev);
339 if (!canif_is_active(netdev))
340
341 continue;
342 if (priv->tx.pending >= TX_ECHO_SKB_MAX)
343 continue;
344 ++work_done;
345 netif_wake_queue(netdev);
346 }
347 return work_done ? IRQ_HANDLED : IRQ_NONE;
348}
349
350
351
352
353
354static irqreturn_t softing_irq_v2(int irq, void *dev_id)
355{
356 struct softing *card = (struct softing *)dev_id;
357 uint8_t ir;
358
359 ir = ioread8(&card->dpram[DPRAM_V2_IRQ_TOHOST]);
360 iowrite8(0, &card->dpram[DPRAM_V2_IRQ_TOHOST]);
361 return (1 == ir) ? IRQ_WAKE_THREAD : IRQ_NONE;
362}
363
364static irqreturn_t softing_irq_v1(int irq, void *dev_id)
365{
366 struct softing *card = (struct softing *)dev_id;
367 uint8_t ir;
368
369 ir = ioread8(&card->dpram[DPRAM_IRQ_TOHOST]);
370 iowrite8(0, &card->dpram[DPRAM_IRQ_TOHOST]);
371 return ir ? IRQ_WAKE_THREAD : IRQ_NONE;
372}
373
374
375
376
377static int softing_netdev_open(struct net_device *ndev)
378{
379 int ret;
380
381
382 ret = open_candev(ndev);
383 if (ret)
384 return ret;
385
386 ret = softing_startstop(ndev, 1);
387 if (ret < 0)
388 close_candev(ndev);
389
390 return ret;
391}
392
393static int softing_netdev_stop(struct net_device *ndev)
394{
395 netif_stop_queue(ndev);
396
397
398 return softing_startstop(ndev, 0);
399}
400
401static int softing_candev_set_mode(struct net_device *ndev, enum can_mode mode)
402{
403 int ret;
404
405 switch (mode) {
406 case CAN_MODE_START:
407
408 ret = softing_startstop(ndev, 1);
409 return ret;
410 case CAN_MODE_STOP:
411 case CAN_MODE_SLEEP:
412 return -EOPNOTSUPP;
413 }
414 return 0;
415}
416
417
418
419
420int softing_enable_irq(struct softing *card, int enable)
421{
422 int ret;
423
424 if (!card->irq.nr) {
425 return 0;
426 } else if (card->irq.requested && !enable) {
427 free_irq(card->irq.nr, card);
428 card->irq.requested = 0;
429 } else if (!card->irq.requested && enable) {
430 ret = request_threaded_irq(card->irq.nr,
431 (card->pdat->generation >= 2) ?
432 softing_irq_v2 : softing_irq_v1,
433 softing_irq_thread, IRQF_SHARED,
434 dev_name(&card->pdev->dev), card);
435 if (ret) {
436 dev_alert(&card->pdev->dev,
437 "request_threaded_irq(%u) failed\n",
438 card->irq.nr);
439 return ret;
440 }
441 card->irq.requested = 1;
442 }
443 return 0;
444}
445
446static void softing_card_shutdown(struct softing *card)
447{
448 int fw_up = 0;
449
450 if (mutex_lock_interruptible(&card->fw.lock)) {
451 ;
452 }
453 fw_up = card->fw.up;
454 card->fw.up = 0;
455
456 if (card->irq.requested && card->irq.nr) {
457 free_irq(card->irq.nr, card);
458 card->irq.requested = 0;
459 }
460 if (fw_up) {
461 if (card->pdat->enable_irq)
462 card->pdat->enable_irq(card->pdev, 0);
463 softing_set_reset_dpram(card);
464 if (card->pdat->reset)
465 card->pdat->reset(card->pdev, 1);
466 }
467 mutex_unlock(&card->fw.lock);
468}
469
470static int softing_card_boot(struct softing *card)
471{
472 int ret, j;
473 static const uint8_t stream[] = {
474 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, };
475 unsigned char back[sizeof(stream)];
476
477 if (mutex_lock_interruptible(&card->fw.lock))
478 return -ERESTARTSYS;
479 if (card->fw.up) {
480 mutex_unlock(&card->fw.lock);
481 return 0;
482 }
483
484 if (card->pdat->enable_irq)
485 card->pdat->enable_irq(card->pdev, 1);
486
487 softing_set_reset_dpram(card);
488 if (card->pdat->reset)
489 card->pdat->reset(card->pdev, 1);
490 for (j = 0; (j + sizeof(stream)) < card->dpram_size;
491 j += sizeof(stream)) {
492
493 memcpy_toio(&card->dpram[j], stream, sizeof(stream));
494
495 mb();
496 memcpy_fromio(back, &card->dpram[j], sizeof(stream));
497
498 if (!memcmp(back, stream, sizeof(stream)))
499 continue;
500
501 dev_alert(&card->pdev->dev, "dpram failed at 0x%04x\n", j);
502 ret = -EIO;
503 goto failed;
504 }
505 wmb();
506
507 ret = softing_load_fw(card->pdat->boot.fw, card, card->dpram,
508 card->dpram_size,
509 card->pdat->boot.offs - card->pdat->boot.addr);
510 if (ret < 0)
511 goto failed;
512
513 ret = softing_load_fw(card->pdat->load.fw, card, card->dpram,
514 card->dpram_size,
515 card->pdat->load.offs - card->pdat->load.addr);
516 if (ret < 0)
517 goto failed;
518
519 if (card->pdat->reset)
520 card->pdat->reset(card->pdev, 0);
521 softing_clr_reset_dpram(card);
522 ret = softing_bootloader_command(card, 0, "card boot");
523 if (ret < 0)
524 goto failed;
525 ret = softing_load_app_fw(card->pdat->app.fw, card);
526 if (ret < 0)
527 goto failed;
528
529 ret = softing_chip_poweron(card);
530 if (ret < 0)
531 goto failed;
532
533 card->fw.up = 1;
534 mutex_unlock(&card->fw.lock);
535 return 0;
536failed:
537 card->fw.up = 0;
538 if (card->pdat->enable_irq)
539 card->pdat->enable_irq(card->pdev, 0);
540 softing_set_reset_dpram(card);
541 if (card->pdat->reset)
542 card->pdat->reset(card->pdev, 1);
543 mutex_unlock(&card->fw.lock);
544 return ret;
545}
546
547
548
549
550static ssize_t show_chip(struct device *dev, struct device_attribute *attr,
551 char *buf)
552{
553 struct net_device *ndev = to_net_dev(dev);
554 struct softing_priv *priv = netdev2softing(ndev);
555
556 return sprintf(buf, "%i\n", priv->chip);
557}
558
559static ssize_t show_output(struct device *dev, struct device_attribute *attr,
560 char *buf)
561{
562 struct net_device *ndev = to_net_dev(dev);
563 struct softing_priv *priv = netdev2softing(ndev);
564
565 return sprintf(buf, "0x%02x\n", priv->output);
566}
567
568static ssize_t store_output(struct device *dev, struct device_attribute *attr,
569 const char *buf, size_t count)
570{
571 struct net_device *ndev = to_net_dev(dev);
572 struct softing_priv *priv = netdev2softing(ndev);
573 struct softing *card = priv->card;
574 unsigned long val;
575 int ret;
576
577 ret = kstrtoul(buf, 0, &val);
578 if (ret < 0)
579 return ret;
580 val &= 0xFF;
581
582 ret = mutex_lock_interruptible(&card->fw.lock);
583 if (ret)
584 return -ERESTARTSYS;
585 if (netif_running(ndev)) {
586 mutex_unlock(&card->fw.lock);
587 return -EBUSY;
588 }
589 priv->output = val;
590 mutex_unlock(&card->fw.lock);
591 return count;
592}
593
594static const DEVICE_ATTR(chip, 0444, show_chip, NULL);
595static const DEVICE_ATTR(output, 0644, show_output, store_output);
596
597static const struct attribute *const netdev_sysfs_attrs[] = {
598 &dev_attr_chip.attr,
599 &dev_attr_output.attr,
600 NULL,
601};
602static const struct attribute_group netdev_sysfs_group = {
603 .name = NULL,
604 .attrs = (struct attribute **)netdev_sysfs_attrs,
605};
606
607static const struct net_device_ops softing_netdev_ops = {
608 .ndo_open = softing_netdev_open,
609 .ndo_stop = softing_netdev_stop,
610 .ndo_start_xmit = softing_netdev_start_xmit,
611 .ndo_change_mtu = can_change_mtu,
612};
613
614static const struct can_bittiming_const softing_btr_const = {
615 .name = "softing",
616 .tseg1_min = 1,
617 .tseg1_max = 16,
618 .tseg2_min = 1,
619 .tseg2_max = 8,
620 .sjw_max = 4,
621 .brp_min = 1,
622 .brp_max = 32,
623 .brp_inc = 1,
624};
625
626
627static struct net_device *softing_netdev_create(struct softing *card,
628 uint16_t chip_id)
629{
630 struct net_device *netdev;
631 struct softing_priv *priv;
632
633 netdev = alloc_candev(sizeof(*priv), TX_ECHO_SKB_MAX);
634 if (!netdev) {
635 dev_alert(&card->pdev->dev, "alloc_candev failed\n");
636 return NULL;
637 }
638 priv = netdev_priv(netdev);
639 priv->netdev = netdev;
640 priv->card = card;
641 memcpy(&priv->btr_const, &softing_btr_const, sizeof(priv->btr_const));
642 priv->btr_const.brp_max = card->pdat->max_brp;
643 priv->btr_const.sjw_max = card->pdat->max_sjw;
644 priv->can.bittiming_const = &priv->btr_const;
645 priv->can.clock.freq = 8000000;
646 priv->chip = chip_id;
647 priv->output = softing_default_output(netdev);
648 SET_NETDEV_DEV(netdev, &card->pdev->dev);
649
650 netdev->flags |= IFF_ECHO;
651 netdev->netdev_ops = &softing_netdev_ops;
652 priv->can.do_set_mode = softing_candev_set_mode;
653 priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
654
655 return netdev;
656}
657
658static int softing_netdev_register(struct net_device *netdev)
659{
660 int ret;
661
662 ret = register_candev(netdev);
663 if (ret) {
664 dev_alert(&netdev->dev, "register failed\n");
665 return ret;
666 }
667 if (sysfs_create_group(&netdev->dev.kobj, &netdev_sysfs_group) < 0)
668 netdev_alert(netdev, "sysfs group failed\n");
669
670 return 0;
671}
672
673static void softing_netdev_cleanup(struct net_device *netdev)
674{
675 sysfs_remove_group(&netdev->dev.kobj, &netdev_sysfs_group);
676 unregister_candev(netdev);
677 free_candev(netdev);
678}
679
680
681
682
683#define DEV_ATTR_RO(name, member) \
684static ssize_t show_##name(struct device *dev, \
685 struct device_attribute *attr, char *buf) \
686{ \
687 struct softing *card = dev_get_drvdata(dev); \
688 return sprintf(buf, "%u\n", card->member); \
689} \
690static DEVICE_ATTR(name, 0444, show_##name, NULL)
691
692#define DEV_ATTR_RO_STR(name, member) \
693static ssize_t show_##name(struct device *dev, \
694 struct device_attribute *attr, char *buf) \
695{ \
696 struct softing *card = dev_get_drvdata(dev); \
697 return sprintf(buf, "%s\n", card->member); \
698} \
699static DEVICE_ATTR(name, 0444, show_##name, NULL)
700
701DEV_ATTR_RO(serial, id.serial);
702DEV_ATTR_RO_STR(firmware, pdat->app.fw);
703DEV_ATTR_RO(firmware_version, id.fw_version);
704DEV_ATTR_RO_STR(hardware, pdat->name);
705DEV_ATTR_RO(hardware_version, id.hw_version);
706DEV_ATTR_RO(license, id.license);
707
708static struct attribute *softing_pdev_attrs[] = {
709 &dev_attr_serial.attr,
710 &dev_attr_firmware.attr,
711 &dev_attr_firmware_version.attr,
712 &dev_attr_hardware.attr,
713 &dev_attr_hardware_version.attr,
714 &dev_attr_license.attr,
715 NULL,
716};
717
718static const struct attribute_group softing_pdev_group = {
719 .name = NULL,
720 .attrs = softing_pdev_attrs,
721};
722
723
724
725
726static int softing_pdev_remove(struct platform_device *pdev)
727{
728 struct softing *card = platform_get_drvdata(pdev);
729 int j;
730
731
732 softing_card_shutdown(card);
733
734 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
735 if (!card->net[j])
736 continue;
737 softing_netdev_cleanup(card->net[j]);
738 card->net[j] = NULL;
739 }
740 sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
741
742 iounmap(card->dpram);
743 kfree(card);
744 return 0;
745}
746
747static int softing_pdev_probe(struct platform_device *pdev)
748{
749 const struct softing_platform_data *pdat = dev_get_platdata(&pdev->dev);
750 struct softing *card;
751 struct net_device *netdev;
752 struct softing_priv *priv;
753 struct resource *pres;
754 int ret;
755 int j;
756
757 if (!pdat) {
758 dev_warn(&pdev->dev, "no platform data\n");
759 return -EINVAL;
760 }
761 if (pdat->nbus > ARRAY_SIZE(card->net)) {
762 dev_warn(&pdev->dev, "%u nets??\n", pdat->nbus);
763 return -EINVAL;
764 }
765
766 card = kzalloc(sizeof(*card), GFP_KERNEL);
767 if (!card)
768 return -ENOMEM;
769 card->pdat = pdat;
770 card->pdev = pdev;
771 platform_set_drvdata(pdev, card);
772 mutex_init(&card->fw.lock);
773 spin_lock_init(&card->spin);
774
775 ret = -EINVAL;
776 pres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
777 if (!pres)
778 goto platform_resource_failed;
779 card->dpram_phys = pres->start;
780 card->dpram_size = resource_size(pres);
781 card->dpram = ioremap(card->dpram_phys, card->dpram_size);
782 if (!card->dpram) {
783 dev_alert(&card->pdev->dev, "dpram ioremap failed\n");
784 goto ioremap_failed;
785 }
786
787 pres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
788 if (pres)
789 card->irq.nr = pres->start;
790
791
792 ret = softing_card_boot(card);
793 if (ret < 0) {
794 dev_alert(&pdev->dev, "failed to boot\n");
795 goto boot_failed;
796 }
797
798
799 card->id.freq = card->pdat->freq;
800
801 ret = sysfs_create_group(&pdev->dev.kobj, &softing_pdev_group);
802 if (ret < 0) {
803 dev_alert(&card->pdev->dev, "sysfs failed\n");
804 goto sysfs_failed;
805 }
806
807 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
808 card->net[j] = netdev =
809 softing_netdev_create(card, card->id.chip[j]);
810 if (!netdev) {
811 dev_alert(&pdev->dev, "failed to make can[%i]", j);
812 ret = -ENOMEM;
813 goto netdev_failed;
814 }
815 netdev->dev_id = j;
816 priv = netdev_priv(card->net[j]);
817 priv->index = j;
818 ret = softing_netdev_register(netdev);
819 if (ret) {
820 free_candev(netdev);
821 card->net[j] = NULL;
822 dev_alert(&card->pdev->dev,
823 "failed to register can[%i]\n", j);
824 goto netdev_failed;
825 }
826 }
827 dev_info(&card->pdev->dev, "%s ready.\n", card->pdat->name);
828 return 0;
829
830netdev_failed:
831 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
832 if (!card->net[j])
833 continue;
834 softing_netdev_cleanup(card->net[j]);
835 }
836 sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
837sysfs_failed:
838 softing_card_shutdown(card);
839boot_failed:
840 iounmap(card->dpram);
841ioremap_failed:
842platform_resource_failed:
843 kfree(card);
844 return ret;
845}
846
847static struct platform_driver softing_driver = {
848 .driver = {
849 .name = "softing",
850 },
851 .probe = softing_pdev_probe,
852 .remove = softing_pdev_remove,
853};
854
855module_platform_driver(softing_driver);
856
857MODULE_ALIAS("platform:softing");
858MODULE_DESCRIPTION("Softing DPRAM CAN driver");
859MODULE_AUTHOR("Kurt Van Dijck <kurt.van.dijck@eia.be>");
860MODULE_LICENSE("GPL v2");
861
