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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 can_get_echo_skb(netdev, priv->tx.echo_get, NULL);
286 ++priv->tx.echo_get;
287 if (priv->tx.echo_get >= TX_ECHO_SKB_MAX)
288 priv->tx.echo_get = 0;
289 if (priv->tx.pending)
290 --priv->tx.pending;
291 if (card->tx.pending)
292 --card->tx.pending;
293 ++netdev->stats.tx_packets;
294 if (!(msg.can_id & CAN_RTR_FLAG))
295 netdev->stats.tx_bytes += msg.len;
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 int ret;
396
397 netif_stop_queue(ndev);
398
399
400 ret = softing_startstop(ndev, 0);
401 return ret;
402}
403
404static int softing_candev_set_mode(struct net_device *ndev, enum can_mode mode)
405{
406 int ret;
407
408 switch (mode) {
409 case CAN_MODE_START:
410
411 ret = softing_startstop(ndev, 1);
412 return ret;
413 case CAN_MODE_STOP:
414 case CAN_MODE_SLEEP:
415 return -EOPNOTSUPP;
416 }
417 return 0;
418}
419
420
421
422
423int softing_enable_irq(struct softing *card, int enable)
424{
425 int ret;
426
427 if (!card->irq.nr) {
428 return 0;
429 } else if (card->irq.requested && !enable) {
430 free_irq(card->irq.nr, card);
431 card->irq.requested = 0;
432 } else if (!card->irq.requested && enable) {
433 ret = request_threaded_irq(card->irq.nr,
434 (card->pdat->generation >= 2) ?
435 softing_irq_v2 : softing_irq_v1,
436 softing_irq_thread, IRQF_SHARED,
437 dev_name(&card->pdev->dev), card);
438 if (ret) {
439 dev_alert(&card->pdev->dev,
440 "request_threaded_irq(%u) failed\n",
441 card->irq.nr);
442 return ret;
443 }
444 card->irq.requested = 1;
445 }
446 return 0;
447}
448
449static void softing_card_shutdown(struct softing *card)
450{
451 int fw_up = 0;
452
453 if (mutex_lock_interruptible(&card->fw.lock)) {
454 ;
455 }
456 fw_up = card->fw.up;
457 card->fw.up = 0;
458
459 if (card->irq.requested && card->irq.nr) {
460 free_irq(card->irq.nr, card);
461 card->irq.requested = 0;
462 }
463 if (fw_up) {
464 if (card->pdat->enable_irq)
465 card->pdat->enable_irq(card->pdev, 0);
466 softing_set_reset_dpram(card);
467 if (card->pdat->reset)
468 card->pdat->reset(card->pdev, 1);
469 }
470 mutex_unlock(&card->fw.lock);
471}
472
473static int softing_card_boot(struct softing *card)
474{
475 int ret, j;
476 static const uint8_t stream[] = {
477 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, };
478 unsigned char back[sizeof(stream)];
479
480 if (mutex_lock_interruptible(&card->fw.lock))
481 return -ERESTARTSYS;
482 if (card->fw.up) {
483 mutex_unlock(&card->fw.lock);
484 return 0;
485 }
486
487 if (card->pdat->enable_irq)
488 card->pdat->enable_irq(card->pdev, 1);
489
490 softing_set_reset_dpram(card);
491 if (card->pdat->reset)
492 card->pdat->reset(card->pdev, 1);
493 for (j = 0; (j + sizeof(stream)) < card->dpram_size;
494 j += sizeof(stream)) {
495
496 memcpy_toio(&card->dpram[j], stream, sizeof(stream));
497
498 mb();
499 memcpy_fromio(back, &card->dpram[j], sizeof(stream));
500
501 if (!memcmp(back, stream, sizeof(stream)))
502 continue;
503
504 dev_alert(&card->pdev->dev, "dpram failed at 0x%04x\n", j);
505 ret = -EIO;
506 goto failed;
507 }
508 wmb();
509
510 ret = softing_load_fw(card->pdat->boot.fw, card, card->dpram,
511 card->dpram_size,
512 card->pdat->boot.offs - card->pdat->boot.addr);
513 if (ret < 0)
514 goto failed;
515
516 ret = softing_load_fw(card->pdat->load.fw, card, card->dpram,
517 card->dpram_size,
518 card->pdat->load.offs - card->pdat->load.addr);
519 if (ret < 0)
520 goto failed;
521
522 if (card->pdat->reset)
523 card->pdat->reset(card->pdev, 0);
524 softing_clr_reset_dpram(card);
525 ret = softing_bootloader_command(card, 0, "card boot");
526 if (ret < 0)
527 goto failed;
528 ret = softing_load_app_fw(card->pdat->app.fw, card);
529 if (ret < 0)
530 goto failed;
531
532 ret = softing_chip_poweron(card);
533 if (ret < 0)
534 goto failed;
535
536 card->fw.up = 1;
537 mutex_unlock(&card->fw.lock);
538 return 0;
539failed:
540 card->fw.up = 0;
541 if (card->pdat->enable_irq)
542 card->pdat->enable_irq(card->pdev, 0);
543 softing_set_reset_dpram(card);
544 if (card->pdat->reset)
545 card->pdat->reset(card->pdev, 1);
546 mutex_unlock(&card->fw.lock);
547 return ret;
548}
549
550
551
552
553static ssize_t show_chip(struct device *dev, struct device_attribute *attr,
554 char *buf)
555{
556 struct net_device *ndev = to_net_dev(dev);
557 struct softing_priv *priv = netdev2softing(ndev);
558
559 return sprintf(buf, "%i\n", priv->chip);
560}
561
562static ssize_t show_output(struct device *dev, struct device_attribute *attr,
563 char *buf)
564{
565 struct net_device *ndev = to_net_dev(dev);
566 struct softing_priv *priv = netdev2softing(ndev);
567
568 return sprintf(buf, "0x%02x\n", priv->output);
569}
570
571static ssize_t store_output(struct device *dev, struct device_attribute *attr,
572 const char *buf, size_t count)
573{
574 struct net_device *ndev = to_net_dev(dev);
575 struct softing_priv *priv = netdev2softing(ndev);
576 struct softing *card = priv->card;
577 unsigned long val;
578 int ret;
579
580 ret = kstrtoul(buf, 0, &val);
581 if (ret < 0)
582 return ret;
583 val &= 0xFF;
584
585 ret = mutex_lock_interruptible(&card->fw.lock);
586 if (ret)
587 return -ERESTARTSYS;
588 if (netif_running(ndev)) {
589 mutex_unlock(&card->fw.lock);
590 return -EBUSY;
591 }
592 priv->output = val;
593 mutex_unlock(&card->fw.lock);
594 return count;
595}
596
597static const DEVICE_ATTR(chip, 0444, show_chip, NULL);
598static const DEVICE_ATTR(output, 0644, show_output, store_output);
599
600static const struct attribute *const netdev_sysfs_attrs[] = {
601 &dev_attr_chip.attr,
602 &dev_attr_output.attr,
603 NULL,
604};
605static const struct attribute_group netdev_sysfs_group = {
606 .name = NULL,
607 .attrs = (struct attribute **)netdev_sysfs_attrs,
608};
609
610static const struct net_device_ops softing_netdev_ops = {
611 .ndo_open = softing_netdev_open,
612 .ndo_stop = softing_netdev_stop,
613 .ndo_start_xmit = softing_netdev_start_xmit,
614 .ndo_change_mtu = can_change_mtu,
615};
616
617static const struct can_bittiming_const softing_btr_const = {
618 .name = "softing",
619 .tseg1_min = 1,
620 .tseg1_max = 16,
621 .tseg2_min = 1,
622 .tseg2_max = 8,
623 .sjw_max = 4,
624 .brp_min = 1,
625 .brp_max = 32,
626 .brp_inc = 1,
627};
628
629
630static struct net_device *softing_netdev_create(struct softing *card,
631 uint16_t chip_id)
632{
633 struct net_device *netdev;
634 struct softing_priv *priv;
635
636 netdev = alloc_candev(sizeof(*priv), TX_ECHO_SKB_MAX);
637 if (!netdev) {
638 dev_alert(&card->pdev->dev, "alloc_candev failed\n");
639 return NULL;
640 }
641 priv = netdev_priv(netdev);
642 priv->netdev = netdev;
643 priv->card = card;
644 memcpy(&priv->btr_const, &softing_btr_const, sizeof(priv->btr_const));
645 priv->btr_const.brp_max = card->pdat->max_brp;
646 priv->btr_const.sjw_max = card->pdat->max_sjw;
647 priv->can.bittiming_const = &priv->btr_const;
648 priv->can.clock.freq = 8000000;
649 priv->chip = chip_id;
650 priv->output = softing_default_output(netdev);
651 SET_NETDEV_DEV(netdev, &card->pdev->dev);
652
653 netdev->flags |= IFF_ECHO;
654 netdev->netdev_ops = &softing_netdev_ops;
655 priv->can.do_set_mode = softing_candev_set_mode;
656 priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
657
658 return netdev;
659}
660
661static int softing_netdev_register(struct net_device *netdev)
662{
663 int ret;
664
665 ret = register_candev(netdev);
666 if (ret) {
667 dev_alert(&netdev->dev, "register failed\n");
668 return ret;
669 }
670 if (sysfs_create_group(&netdev->dev.kobj, &netdev_sysfs_group) < 0)
671 netdev_alert(netdev, "sysfs group failed\n");
672
673 return 0;
674}
675
676static void softing_netdev_cleanup(struct net_device *netdev)
677{
678 sysfs_remove_group(&netdev->dev.kobj, &netdev_sysfs_group);
679 unregister_candev(netdev);
680 free_candev(netdev);
681}
682
683
684
685
686#define DEV_ATTR_RO(name, member) \
687static ssize_t show_##name(struct device *dev, \
688 struct device_attribute *attr, char *buf) \
689{ \
690 struct softing *card = dev_get_drvdata(dev); \
691 return sprintf(buf, "%u\n", card->member); \
692} \
693static DEVICE_ATTR(name, 0444, show_##name, NULL)
694
695#define DEV_ATTR_RO_STR(name, member) \
696static ssize_t show_##name(struct device *dev, \
697 struct device_attribute *attr, char *buf) \
698{ \
699 struct softing *card = dev_get_drvdata(dev); \
700 return sprintf(buf, "%s\n", card->member); \
701} \
702static DEVICE_ATTR(name, 0444, show_##name, NULL)
703
704DEV_ATTR_RO(serial, id.serial);
705DEV_ATTR_RO_STR(firmware, pdat->app.fw);
706DEV_ATTR_RO(firmware_version, id.fw_version);
707DEV_ATTR_RO_STR(hardware, pdat->name);
708DEV_ATTR_RO(hardware_version, id.hw_version);
709DEV_ATTR_RO(license, id.license);
710
711static struct attribute *softing_pdev_attrs[] = {
712 &dev_attr_serial.attr,
713 &dev_attr_firmware.attr,
714 &dev_attr_firmware_version.attr,
715 &dev_attr_hardware.attr,
716 &dev_attr_hardware_version.attr,
717 &dev_attr_license.attr,
718 NULL,
719};
720
721static const struct attribute_group softing_pdev_group = {
722 .name = NULL,
723 .attrs = softing_pdev_attrs,
724};
725
726
727
728
729static int softing_pdev_remove(struct platform_device *pdev)
730{
731 struct softing *card = platform_get_drvdata(pdev);
732 int j;
733
734
735 softing_card_shutdown(card);
736
737 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
738 if (!card->net[j])
739 continue;
740 softing_netdev_cleanup(card->net[j]);
741 card->net[j] = NULL;
742 }
743 sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
744
745 iounmap(card->dpram);
746 kfree(card);
747 return 0;
748}
749
750static int softing_pdev_probe(struct platform_device *pdev)
751{
752 const struct softing_platform_data *pdat = dev_get_platdata(&pdev->dev);
753 struct softing *card;
754 struct net_device *netdev;
755 struct softing_priv *priv;
756 struct resource *pres;
757 int ret;
758 int j;
759
760 if (!pdat) {
761 dev_warn(&pdev->dev, "no platform data\n");
762 return -EINVAL;
763 }
764 if (pdat->nbus > ARRAY_SIZE(card->net)) {
765 dev_warn(&pdev->dev, "%u nets??\n", pdat->nbus);
766 return -EINVAL;
767 }
768
769 card = kzalloc(sizeof(*card), GFP_KERNEL);
770 if (!card)
771 return -ENOMEM;
772 card->pdat = pdat;
773 card->pdev = pdev;
774 platform_set_drvdata(pdev, card);
775 mutex_init(&card->fw.lock);
776 spin_lock_init(&card->spin);
777
778 ret = -EINVAL;
779 pres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
780 if (!pres)
781 goto platform_resource_failed;
782 card->dpram_phys = pres->start;
783 card->dpram_size = resource_size(pres);
784 card->dpram = ioremap(card->dpram_phys, card->dpram_size);
785 if (!card->dpram) {
786 dev_alert(&card->pdev->dev, "dpram ioremap failed\n");
787 goto ioremap_failed;
788 }
789
790 pres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
791 if (pres)
792 card->irq.nr = pres->start;
793
794
795 ret = softing_card_boot(card);
796 if (ret < 0) {
797 dev_alert(&pdev->dev, "failed to boot\n");
798 goto boot_failed;
799 }
800
801
802 card->id.freq = card->pdat->freq;
803
804 ret = sysfs_create_group(&pdev->dev.kobj, &softing_pdev_group);
805 if (ret < 0) {
806 dev_alert(&card->pdev->dev, "sysfs failed\n");
807 goto sysfs_failed;
808 }
809
810 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
811 card->net[j] = netdev =
812 softing_netdev_create(card, card->id.chip[j]);
813 if (!netdev) {
814 dev_alert(&pdev->dev, "failed to make can[%i]", j);
815 ret = -ENOMEM;
816 goto netdev_failed;
817 }
818 netdev->dev_id = j;
819 priv = netdev_priv(card->net[j]);
820 priv->index = j;
821 ret = softing_netdev_register(netdev);
822 if (ret) {
823 free_candev(netdev);
824 card->net[j] = NULL;
825 dev_alert(&card->pdev->dev,
826 "failed to register can[%i]\n", j);
827 goto netdev_failed;
828 }
829 }
830 dev_info(&card->pdev->dev, "%s ready.\n", card->pdat->name);
831 return 0;
832
833netdev_failed:
834 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
835 if (!card->net[j])
836 continue;
837 softing_netdev_cleanup(card->net[j]);
838 }
839 sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
840sysfs_failed:
841 softing_card_shutdown(card);
842boot_failed:
843 iounmap(card->dpram);
844ioremap_failed:
845platform_resource_failed:
846 kfree(card);
847 return ret;
848}
849
850static struct platform_driver softing_driver = {
851 .driver = {
852 .name = "softing",
853 },
854 .probe = softing_pdev_probe,
855 .remove = softing_pdev_remove,
856};
857
858module_platform_driver(softing_driver);
859
860MODULE_ALIAS("platform:softing");
861MODULE_DESCRIPTION("Softing DPRAM CAN driver");
862MODULE_AUTHOR("Kurt Van Dijck <kurt.van.dijck@eia.be>");
863MODULE_LICENSE("GPL v2");
864
