1 // SPDX-License-Identifier: GPL-2.0
2 /* Parts of this driver are based on the following:
3 * - Kvaser linux leaf driver (version 4.78)
4 * - CAN driver for esd CAN-USB/2
5 * - Kvaser linux usbcanII driver (version 5.3)
6 *
7 * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved.
8 * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh
9 * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be>
10 * Copyright (C) 2015 Valeo S.A.
11 */
12
13 #include <linux/bitfield.h>
14 #include <linux/completion.h>
15 #include <linux/device.h>
16 #include <linux/gfp.h>
17 #include <linux/jiffies.h>
18 #include <linux/kernel.h>
19 #include <linux/netdevice.h>
20 #include <linux/spinlock.h>
21 #include <linux/string.h>
22 #include <linux/types.h>
23 #include <linux/units.h>
24 #include <linux/usb.h>
25 #include <linux/workqueue.h>
26
27 #include <linux/can.h>
28 #include <linux/can/dev.h>
29 #include <linux/can/error.h>
30 #include <linux/can/netlink.h>
31
32 #include "kvaser_usb.h"
33
34 #define MAX_USBCAN_NET_DEVICES 2
35
36 /* Command header size */
37 #define CMD_HEADER_LEN 2
38
39 /* Kvaser CAN message flags */
40 #define MSG_FLAG_ERROR_FRAME BIT(0)
41 #define MSG_FLAG_OVERRUN BIT(1)
42 #define MSG_FLAG_NERR BIT(2)
43 #define MSG_FLAG_WAKEUP BIT(3)
44 #define MSG_FLAG_REMOTE_FRAME BIT(4)
45 #define MSG_FLAG_RESERVED BIT(5)
46 #define MSG_FLAG_TX_ACK BIT(6)
47 #define MSG_FLAG_TX_REQUEST BIT(7)
48
49 /* CAN states (M16C CxSTRH register) */
50 #define M16C_STATE_BUS_RESET BIT(0)
51 #define M16C_STATE_BUS_ERROR BIT(4)
52 #define M16C_STATE_BUS_PASSIVE BIT(5)
53 #define M16C_STATE_BUS_OFF BIT(6)
54
55 /* Leaf/usbcan command ids */
56 #define CMD_RX_STD_MESSAGE 12
57 #define CMD_TX_STD_MESSAGE 13
58 #define CMD_RX_EXT_MESSAGE 14
59 #define CMD_TX_EXT_MESSAGE 15
60 #define CMD_SET_BUS_PARAMS 16
61 #define CMD_GET_BUS_PARAMS 17
62 #define CMD_GET_BUS_PARAMS_REPLY 18
63 #define CMD_GET_CHIP_STATE 19
64 #define CMD_CHIP_STATE_EVENT 20
65 #define CMD_SET_CTRL_MODE 21
66 #define CMD_RESET_CHIP 24
67 #define CMD_START_CHIP 26
68 #define CMD_START_CHIP_REPLY 27
69 #define CMD_STOP_CHIP 28
70 #define CMD_STOP_CHIP_REPLY 29
71
72 #define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 33
73
74 #define CMD_GET_CARD_INFO 34
75 #define CMD_GET_CARD_INFO_REPLY 35
76 #define CMD_GET_SOFTWARE_INFO 38
77 #define CMD_GET_SOFTWARE_INFO_REPLY 39
78 #define CMD_ERROR_EVENT 45
79 #define CMD_FLUSH_QUEUE 48
80 #define CMD_TX_ACKNOWLEDGE 50
81 #define CMD_CAN_ERROR_EVENT 51
82 #define CMD_FLUSH_QUEUE_REPLY 68
83 #define CMD_GET_CAPABILITIES_REQ 95
84 #define CMD_GET_CAPABILITIES_RESP 96
85 #define CMD_LED_ACTION_REQ 101
86 #define CMD_LED_ACTION_RESP 102
87
88 #define CMD_LEAF_LOG_MESSAGE 106
89
90 /* Leaf frequency options */
91 #define KVASER_USB_LEAF_SWOPTION_FREQ_MASK 0x60
92 #define KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK 0
93 #define KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK BIT(5)
94 #define KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK BIT(6)
95
96 #define KVASER_USB_LEAF_SWOPTION_EXT_CAP BIT(12)
97
98 /* error factors */
99 #define M16C_EF_ACKE BIT(0)
100 #define M16C_EF_CRCE BIT(1)
101 #define M16C_EF_FORME BIT(2)
102 #define M16C_EF_STFE BIT(3)
103 #define M16C_EF_BITE0 BIT(4)
104 #define M16C_EF_BITE1 BIT(5)
105 #define M16C_EF_RCVE BIT(6)
106 #define M16C_EF_TRE BIT(7)
107
108 /* Only Leaf-based devices can report M16C error factors,
109 * thus define our own error status flags for USBCANII
110 */
111 #define USBCAN_ERROR_STATE_NONE 0
112 #define USBCAN_ERROR_STATE_TX_ERROR BIT(0)
113 #define USBCAN_ERROR_STATE_RX_ERROR BIT(1)
114 #define USBCAN_ERROR_STATE_BUSERROR BIT(2)
115
116 /* ctrl modes */
117 #define KVASER_CTRL_MODE_NORMAL 1
118 #define KVASER_CTRL_MODE_SILENT 2
119 #define KVASER_CTRL_MODE_SELFRECEPTION 3
120 #define KVASER_CTRL_MODE_OFF 4
121
122 /* Extended CAN identifier flag */
123 #define KVASER_EXTENDED_FRAME BIT(31)
124
125 /* USBCanII timestamp */
126 #define KVASER_USB_USBCAN_CLK_OVERFLOW_MASK GENMASK(31, 16)
127 #define KVASER_USB_USBCAN_TIMESTAMP_FACTOR 10
128
129 struct kvaser_cmd_simple {
130 u8 tid;
131 u8 channel;
132 } __packed;
133
134 struct kvaser_cmd_cardinfo {
135 u8 tid;
136 u8 nchannels;
137 __le32 serial_number;
138 __le32 padding0;
139 __le32 clock_resolution;
140 __le32 mfgdate;
141 __le32 ean[2];
142 u8 hw_revision;
143 union {
144 struct {
145 u8 usb_hs_mode;
146 } __packed leaf1;
147 struct {
148 u8 padding;
149 } __packed usbcan1;
150 } __packed;
151 __le16 padding1;
152 } __packed;
153
154 struct leaf_cmd_softinfo {
155 u8 tid;
156 u8 padding0;
157 __le32 sw_options;
158 __le32 fw_version;
159 __le16 max_outstanding_tx;
160 __le16 padding1[9];
161 } __packed;
162
163 struct usbcan_cmd_softinfo {
164 u8 tid;
165 u8 fw_name[5];
166 __le16 max_outstanding_tx;
167 u8 padding[6];
168 __le32 fw_version;
169 __le16 checksum;
170 __le16 sw_options;
171 } __packed;
172
173 struct kvaser_cmd_busparams {
174 u8 tid;
175 u8 channel;
176 struct kvaser_usb_busparams busparams;
177 } __packed;
178
179 /* The device has one LED per CAN channel
180 * The LSB of action field controls the state:
181 * 0 = ON
182 * 1 = OFF
183 * The remaining bits of action field is the LED index
184 */
185 #define KVASER_USB_LEAF_LED_IDX_MASK GENMASK(31, 1)
186 #define KVASER_USB_LEAF_LED_YELLOW_CH0_IDX 2
187 struct kvaser_cmd_led_action_req {
188 u8 tid;
189 u8 action;
190 __le16 duration_ms;
191 u8 padding[24];
192 } __packed;
193
194 struct kvaser_cmd_tx_can {
195 u8 channel;
196 u8 tid;
197 u8 data[14];
198 union {
199 struct {
200 u8 padding;
201 u8 flags;
202 } __packed leaf;
203 struct {
204 u8 flags;
205 u8 padding;
206 } __packed usbcan;
207 } __packed;
208 } __packed;
209
210 struct kvaser_cmd_rx_can_header {
211 u8 channel;
212 u8 flag;
213 } __packed;
214
215 struct leaf_cmd_rx_can {
216 u8 channel;
217 u8 flag;
218
219 __le16 time[3];
220 u8 data[14];
221 } __packed;
222
223 struct usbcan_cmd_rx_can {
224 u8 channel;
225 u8 flag;
226
227 u8 data[14];
228 __le16 time;
229 } __packed;
230
231 struct leaf_cmd_chip_state_event {
232 u8 tid;
233 u8 channel;
234
235 __le16 time[3];
236 u8 tx_errors_count;
237 u8 rx_errors_count;
238
239 u8 status;
240 u8 padding[3];
241 } __packed;
242
243 struct usbcan_cmd_chip_state_event {
244 u8 tid;
245 u8 channel;
246
247 u8 tx_errors_count;
248 u8 rx_errors_count;
249 __le16 time;
250
251 u8 status;
252 u8 padding[3];
253 } __packed;
254
255 struct kvaser_cmd_tx_acknowledge_header {
256 u8 channel;
257 u8 tid;
258 } __packed;
259
260 struct leaf_cmd_tx_acknowledge {
261 u8 channel;
262 u8 tid;
263 __le16 time[3];
264 u8 padding[2];
265 } __packed;
266
267 struct usbcan_cmd_tx_acknowledge {
268 u8 channel;
269 u8 tid;
270 __le16 time;
271 u8 padding[2];
272 } __packed;
273
274 struct leaf_cmd_can_error_event {
275 u8 tid;
276 u8 flags;
277 __le16 time[3];
278 u8 channel;
279 u8 padding;
280 u8 tx_errors_count;
281 u8 rx_errors_count;
282 u8 status;
283 u8 error_factor;
284 } __packed;
285
286 struct usbcan_cmd_can_error_event {
287 u8 tid;
288 u8 padding;
289 u8 tx_errors_count_ch0;
290 u8 rx_errors_count_ch0;
291 u8 tx_errors_count_ch1;
292 u8 rx_errors_count_ch1;
293 u8 status_ch0;
294 u8 status_ch1;
295 __le16 time;
296 } __packed;
297
298 /* CMD_ERROR_EVENT error codes */
299 #define KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL 0x8
300 #define KVASER_USB_LEAF_ERROR_EVENT_PARAM 0x9
301
302 struct leaf_cmd_error_event {
303 u8 tid;
304 u8 error_code;
305 __le16 timestamp[3];
306 __le16 padding;
307 __le16 info1;
308 __le16 info2;
309 } __packed;
310
311 struct usbcan_cmd_error_event {
312 u8 tid;
313 u8 error_code;
314 __le16 info1;
315 __le16 info2;
316 __le16 timestamp;
317 __le16 padding;
318 } __packed;
319
320 struct usbcan_cmd_clk_overflow_event {
321 u8 tid;
322 u8 padding;
323 __le32 time;
324 } __packed;
325
326 struct kvaser_cmd_ctrl_mode {
327 u8 tid;
328 u8 channel;
329 u8 ctrl_mode;
330 u8 padding[3];
331 } __packed;
332
333 struct kvaser_cmd_flush_queue {
334 u8 tid;
335 u8 channel;
336 u8 flags;
337 u8 padding[3];
338 } __packed;
339
340 struct leaf_cmd_log_message {
341 u8 channel;
342 u8 flags;
343 __le16 time[3];
344 u8 dlc;
345 u8 time_offset;
346 __le32 id;
347 u8 data[8];
348 } __packed;
349
350 /* Sub commands for cap_req and cap_res */
351 #define KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE 0x02
352 #define KVASER_USB_LEAF_CAP_CMD_ERR_REPORT 0x05
353 struct kvaser_cmd_cap_req {
354 __le16 padding0;
355 __le16 cap_cmd;
356 __le16 padding1;
357 __le16 channel;
358 } __packed;
359
360 /* Status codes for cap_res */
361 #define KVASER_USB_LEAF_CAP_STAT_OK 0x00
362 #define KVASER_USB_LEAF_CAP_STAT_NOT_IMPL 0x01
363 #define KVASER_USB_LEAF_CAP_STAT_UNAVAIL 0x02
364 struct kvaser_cmd_cap_res {
365 __le16 padding;
366 __le16 cap_cmd;
367 __le16 status;
368 __le32 mask;
369 __le32 value;
370 } __packed;
371
372 struct kvaser_cmd {
373 u8 len;
374 u8 id;
375 union {
376 struct kvaser_cmd_simple simple;
377 struct kvaser_cmd_cardinfo cardinfo;
378 struct kvaser_cmd_busparams busparams;
379
380 struct kvaser_cmd_led_action_req led_action_req;
381
382 struct kvaser_cmd_rx_can_header rx_can_header;
383 struct kvaser_cmd_tx_acknowledge_header tx_acknowledge_header;
384
385 union {
386 struct leaf_cmd_softinfo softinfo;
387 struct leaf_cmd_rx_can rx_can;
388 struct leaf_cmd_chip_state_event chip_state_event;
389 struct leaf_cmd_can_error_event can_error_event;
390 struct leaf_cmd_log_message log_message;
391 struct leaf_cmd_error_event error_event;
392 struct kvaser_cmd_cap_req cap_req;
393 struct kvaser_cmd_cap_res cap_res;
394 struct leaf_cmd_tx_acknowledge tx_ack;
395 } __packed leaf;
396
397 union {
398 struct usbcan_cmd_softinfo softinfo;
399 struct usbcan_cmd_rx_can rx_can;
400 struct usbcan_cmd_chip_state_event chip_state_event;
401 struct usbcan_cmd_can_error_event can_error_event;
402 struct usbcan_cmd_error_event error_event;
403 struct usbcan_cmd_tx_acknowledge tx_ack;
404 struct usbcan_cmd_clk_overflow_event clk_overflow_event;
405 } __packed usbcan;
406
407 struct kvaser_cmd_tx_can tx_can;
408 struct kvaser_cmd_ctrl_mode ctrl_mode;
409 struct kvaser_cmd_flush_queue flush_queue;
410 } u;
411 } __packed;
412
413 #define CMD_SIZE_ANY 0xff
414 #define kvaser_fsize(field) sizeof_field(struct kvaser_cmd, field)
415
416 static const u8 kvaser_usb_leaf_cmd_sizes_leaf[] = {
417 [CMD_START_CHIP_REPLY] = kvaser_fsize(u.simple),
418 [CMD_STOP_CHIP_REPLY] = kvaser_fsize(u.simple),
419 [CMD_GET_CARD_INFO_REPLY] = kvaser_fsize(u.cardinfo),
420 [CMD_TX_ACKNOWLEDGE] = kvaser_fsize(u.leaf.tx_ack),
421 [CMD_GET_SOFTWARE_INFO_REPLY] = kvaser_fsize(u.leaf.softinfo),
422 [CMD_RX_STD_MESSAGE] = kvaser_fsize(u.leaf.rx_can),
423 [CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.leaf.rx_can),
424 [CMD_LEAF_LOG_MESSAGE] = kvaser_fsize(u.leaf.log_message),
425 [CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.leaf.chip_state_event),
426 [CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.leaf.can_error_event),
427 [CMD_GET_CAPABILITIES_RESP] = kvaser_fsize(u.leaf.cap_res),
428 [CMD_GET_BUS_PARAMS_REPLY] = kvaser_fsize(u.busparams),
429 [CMD_ERROR_EVENT] = kvaser_fsize(u.leaf.error_event),
430 /* ignored events: */
431 [CMD_FLUSH_QUEUE_REPLY] = CMD_SIZE_ANY,
432 [CMD_LED_ACTION_RESP] = CMD_SIZE_ANY,
433 };
434
435 static const u8 kvaser_usb_leaf_cmd_sizes_usbcan[] = {
436 [CMD_START_CHIP_REPLY] = kvaser_fsize(u.simple),
437 [CMD_STOP_CHIP_REPLY] = kvaser_fsize(u.simple),
438 [CMD_GET_CARD_INFO_REPLY] = kvaser_fsize(u.cardinfo),
439 [CMD_TX_ACKNOWLEDGE] = kvaser_fsize(u.usbcan.tx_ack),
440 [CMD_GET_SOFTWARE_INFO_REPLY] = kvaser_fsize(u.usbcan.softinfo),
441 [CMD_RX_STD_MESSAGE] = kvaser_fsize(u.usbcan.rx_can),
442 [CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.usbcan.rx_can),
443 [CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.usbcan.chip_state_event),
444 [CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.usbcan.can_error_event),
445 [CMD_ERROR_EVENT] = kvaser_fsize(u.usbcan.error_event),
446 [CMD_USBCAN_CLOCK_OVERFLOW_EVENT] = kvaser_fsize(u.usbcan.clk_overflow_event),
447 /* ignored events: */
448 [CMD_LED_ACTION_RESP] = CMD_SIZE_ANY,
449 };
450
451 /* Summary of a kvaser error event, for a unified Leaf/Usbcan error
452 * handling. Some discrepancies between the two families exist:
453 *
454 * - USBCAN firmware does not report M16C "error factors"
455 * - USBCAN controllers has difficulties reporting if the raised error
456 * event is for ch0 or ch1. They leave such arbitration to the OS
457 * driver by letting it compare error counters with previous values
458 * and decide the error event's channel. Thus for USBCAN, the channel
459 * field is only advisory.
460 */
461 struct kvaser_usb_err_summary {
462 u8 channel, status, txerr, rxerr;
463 union {
464 struct {
465 u8 error_factor;
466 } leaf;
467 struct {
468 u8 other_ch_status;
469 u8 error_state;
470 } usbcan;
471 };
472 };
473
474 struct kvaser_usb_net_leaf_priv {
475 struct kvaser_usb_net_priv *net;
476
477 struct delayed_work chip_state_req_work;
478
479 /* started but not reported as bus-on yet */
480 bool joining_bus;
481 };
482
483 static const struct can_bittiming_const kvaser_usb_leaf_m16c_bittiming_const = {
484 .name = "kvaser_usb_ucii",
485 .tseg1_min = 4,
486 .tseg1_max = 16,
487 .tseg2_min = 2,
488 .tseg2_max = 8,
489 .sjw_max = 4,
490 .brp_min = 1,
491 .brp_max = 16,
492 .brp_inc = 1,
493 };
494
495 static const struct can_bittiming_const kvaser_usb_leaf_m32c_bittiming_const = {
496 .name = "kvaser_usb_leaf",
497 .tseg1_min = 3,
498 .tseg1_max = 16,
499 .tseg2_min = 2,
500 .tseg2_max = 8,
501 .sjw_max = 4,
502 .brp_min = 2,
503 .brp_max = 128,
504 .brp_inc = 2,
505 };
506
507 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_usbcan_dev_cfg = {
508 .clock = {
509 .freq = 8 * MEGA /* Hz */,
510 },
511 .timestamp_freq = 1,
512 .bittiming_const = &kvaser_usb_leaf_m16c_bittiming_const,
513 };
514
515 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg_16mhz = {
516 .clock = {
517 .freq = 16 * MEGA /* Hz */,
518 },
519 .timestamp_freq = 16,
520 .bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,
521 };
522
523 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg_24mhz = {
524 .clock = {
525 .freq = 16 * MEGA /* Hz */,
526 },
527 .timestamp_freq = 24,
528 .bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,
529 };
530
531 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg_32mhz = {
532 .clock = {
533 .freq = 16 * MEGA /* Hz */,
534 },
535 .timestamp_freq = 32,
536 .bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,
537 };
538
539 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_16mhz = {
540 .clock = {
541 .freq = 16 * MEGA /* Hz */,
542 },
543 .timestamp_freq = 16,
544 .bittiming_const = &kvaser_usb_flexc_bittiming_const,
545 };
546
547 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_24mhz = {
548 .clock = {
549 .freq = 24 * MEGA /* Hz */,
550 },
551 .timestamp_freq = 24,
552 .bittiming_const = &kvaser_usb_flexc_bittiming_const,
553 };
554
555 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_32mhz = {
556 .clock = {
557 .freq = 32 * MEGA /* Hz */,
558 },
559 .timestamp_freq = 32,
560 .bittiming_const = &kvaser_usb_flexc_bittiming_const,
561 };
562
kvaser_usb_usbcan_timestamp_to_ktime(const struct kvaser_usb * dev,__le16 timestamp)563 static inline ktime_t kvaser_usb_usbcan_timestamp_to_ktime(const struct kvaser_usb *dev,
564 __le16 timestamp)
565 {
566 u64 ticks = le16_to_cpu(timestamp) |
567 dev->card_data.usbcan_timestamp_msb;
568
569 return kvaser_usb_ticks_to_ktime(dev->cfg, ticks * KVASER_USB_USBCAN_TIMESTAMP_FACTOR);
570 }
571
kvaser_usb_leaf_verify_size(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)572 static int kvaser_usb_leaf_verify_size(const struct kvaser_usb *dev,
573 const struct kvaser_cmd *cmd)
574 {
575 /* buffer size >= cmd->len ensured by caller */
576 u8 min_size = 0;
577
578 switch (dev->driver_info->family) {
579 case KVASER_LEAF:
580 if (cmd->id < ARRAY_SIZE(kvaser_usb_leaf_cmd_sizes_leaf))
581 min_size = kvaser_usb_leaf_cmd_sizes_leaf[cmd->id];
582 break;
583 case KVASER_USBCAN:
584 if (cmd->id < ARRAY_SIZE(kvaser_usb_leaf_cmd_sizes_usbcan))
585 min_size = kvaser_usb_leaf_cmd_sizes_usbcan[cmd->id];
586 break;
587 }
588
589 if (min_size == CMD_SIZE_ANY)
590 return 0;
591
592 if (min_size) {
593 min_size += CMD_HEADER_LEN;
594 if (cmd->len >= min_size)
595 return 0;
596
597 dev_err_ratelimited(&dev->intf->dev,
598 "Received command %u too short (size %u, needed %u)",
599 cmd->id, cmd->len, min_size);
600 return -EIO;
601 }
602
603 dev_warn_ratelimited(&dev->intf->dev,
604 "Unhandled command (%d, size %d)\n",
605 cmd->id, cmd->len);
606 return -EINVAL;
607 }
608
609 static void *
kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv * priv,const struct sk_buff * skb,int * cmd_len,u16 transid)610 kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv,
611 const struct sk_buff *skb, int *cmd_len,
612 u16 transid)
613 {
614 struct kvaser_usb *dev = priv->dev;
615 struct kvaser_cmd *cmd;
616 u8 *cmd_tx_can_flags = NULL; /* GCC */
617 struct can_frame *cf = (struct can_frame *)skb->data;
618
619 cmd = kmalloc_obj(*cmd, GFP_ATOMIC);
620 if (cmd) {
621 cmd->u.tx_can.tid = transid & 0xff;
622 cmd->len = *cmd_len = CMD_HEADER_LEN +
623 sizeof(struct kvaser_cmd_tx_can);
624 cmd->u.tx_can.channel = priv->channel;
625
626 switch (dev->driver_info->family) {
627 case KVASER_LEAF:
628 cmd_tx_can_flags = &cmd->u.tx_can.leaf.flags;
629 break;
630 case KVASER_USBCAN:
631 cmd_tx_can_flags = &cmd->u.tx_can.usbcan.flags;
632 break;
633 }
634
635 *cmd_tx_can_flags = 0;
636
637 if (cf->can_id & CAN_EFF_FLAG) {
638 cmd->id = CMD_TX_EXT_MESSAGE;
639 cmd->u.tx_can.data[0] = (cf->can_id >> 24) & 0x1f;
640 cmd->u.tx_can.data[1] = (cf->can_id >> 18) & 0x3f;
641 cmd->u.tx_can.data[2] = (cf->can_id >> 14) & 0x0f;
642 cmd->u.tx_can.data[3] = (cf->can_id >> 6) & 0xff;
643 cmd->u.tx_can.data[4] = cf->can_id & 0x3f;
644 } else {
645 cmd->id = CMD_TX_STD_MESSAGE;
646 cmd->u.tx_can.data[0] = (cf->can_id >> 6) & 0x1f;
647 cmd->u.tx_can.data[1] = cf->can_id & 0x3f;
648 }
649
650 cmd->u.tx_can.data[5] = can_get_cc_dlc(cf, priv->can.ctrlmode);
651 memcpy(&cmd->u.tx_can.data[6], cf->data, cf->len);
652
653 if (cf->can_id & CAN_RTR_FLAG)
654 *cmd_tx_can_flags |= MSG_FLAG_REMOTE_FRAME;
655 }
656 return cmd;
657 }
658
kvaser_usb_leaf_wait_cmd(const struct kvaser_usb * dev,u8 id,struct kvaser_cmd * cmd)659 static int kvaser_usb_leaf_wait_cmd(const struct kvaser_usb *dev, u8 id,
660 struct kvaser_cmd *cmd)
661 {
662 struct kvaser_cmd *tmp;
663 void *buf;
664 int actual_len;
665 int err;
666 int pos;
667 unsigned long to = jiffies + msecs_to_jiffies(KVASER_USB_TIMEOUT);
668
669 buf = kzalloc(KVASER_USB_RX_BUFFER_SIZE, GFP_KERNEL);
670 if (!buf)
671 return -ENOMEM;
672
673 do {
674 err = kvaser_usb_recv_cmd(dev, buf, KVASER_USB_RX_BUFFER_SIZE,
675 &actual_len);
676 if (err < 0)
677 goto end;
678
679 pos = 0;
680 while (pos <= actual_len - CMD_HEADER_LEN) {
681 tmp = buf + pos;
682
683 /* Handle commands crossing the USB endpoint max packet
684 * size boundary. Check kvaser_usb_read_bulk_callback()
685 * for further details.
686 */
687 if (tmp->len == 0) {
688 pos = round_up(pos + 1,
689 le16_to_cpu
690 (dev->bulk_in->wMaxPacketSize));
691 continue;
692 }
693
694 if (tmp->len < CMD_HEADER_LEN ||
695 tmp->len > actual_len - pos) {
696 dev_err_ratelimited(&dev->intf->dev,
697 "Format error\n");
698 break;
699 }
700
701 if (tmp->id == id) {
702 if (tmp->len > sizeof(*cmd)) {
703 dev_err_ratelimited(&dev->intf->dev,
704 "Received command %u too large (%u)\n",
705 tmp->id, tmp->len);
706 err = -EIO;
707 goto end;
708 }
709
710 memcpy(cmd, tmp, tmp->len);
711 goto end;
712 }
713
714 pos += tmp->len;
715 }
716 } while (time_before(jiffies, to));
717
718 err = -EINVAL;
719
720 end:
721 kfree(buf);
722
723 if (err == 0)
724 err = kvaser_usb_leaf_verify_size(dev, cmd);
725
726 return err;
727 }
728
kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb * dev,u8 cmd_id,int channel)729 static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev,
730 u8 cmd_id, int channel)
731 {
732 struct kvaser_cmd *cmd;
733 int rc;
734
735 cmd = kmalloc_obj(*cmd);
736 if (!cmd)
737 return -ENOMEM;
738
739 cmd->id = cmd_id;
740 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple);
741 cmd->u.simple.channel = channel;
742 cmd->u.simple.tid = 0xff;
743
744 rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);
745
746 kfree(cmd);
747 return rc;
748 }
749
kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb * dev,const struct leaf_cmd_softinfo * softinfo)750 static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev,
751 const struct leaf_cmd_softinfo *softinfo)
752 {
753 u32 fw_version;
754 u32 sw_options = le32_to_cpu(softinfo->sw_options);
755
756 fw_version = le32_to_cpu(softinfo->fw_version);
757 dev->fw_version.major = FIELD_GET(KVASER_USB_SW_VERSION_MAJOR_MASK, fw_version);
758 dev->fw_version.minor = FIELD_GET(KVASER_USB_SW_VERSION_MINOR_MASK, fw_version);
759 dev->fw_version.build = FIELD_GET(KVASER_USB_SW_VERSION_BUILD_MASK, fw_version);
760 dev->max_tx_urbs = le16_to_cpu(softinfo->max_outstanding_tx);
761
762 if (sw_options & KVASER_USB_LEAF_SWOPTION_EXT_CAP)
763 dev->card_data.capabilities |= KVASER_USB_CAP_EXT_CAP;
764
765 if (dev->driver_info->quirks & KVASER_USB_QUIRK_IGNORE_CLK_FREQ) {
766 /* Firmware expects bittiming parameters calculated for 16MHz
767 * clock, regardless of the actual clock
768 * Though, the reported freq is used for timestamps
769 */
770 switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {
771 case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:
772 dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_16mhz;
773 break;
774 case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:
775 dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_24mhz;
776 break;
777 case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:
778 dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_32mhz;
779 break;
780 }
781 } else {
782 switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {
783 case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:
784 dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_16mhz;
785 break;
786 case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:
787 dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_24mhz;
788 break;
789 case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:
790 dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_32mhz;
791 break;
792 }
793 }
794 }
795
kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb * dev)796 static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev)
797 {
798 struct kvaser_cmd cmd;
799 int err;
800 u32 fw_version;
801
802 err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO, 0);
803 if (err)
804 return err;
805
806 err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_REPLY, &cmd);
807 if (err)
808 return err;
809
810 switch (dev->driver_info->family) {
811 case KVASER_LEAF:
812 kvaser_usb_leaf_get_software_info_leaf(dev, &cmd.u.leaf.softinfo);
813 break;
814 case KVASER_USBCAN:
815 fw_version = le32_to_cpu(cmd.u.usbcan.softinfo.fw_version);
816 dev->fw_version.major = FIELD_GET(KVASER_USB_SW_VERSION_MAJOR_MASK,
817 fw_version);
818 dev->fw_version.minor = FIELD_GET(KVASER_USB_SW_VERSION_MINOR_MASK,
819 fw_version);
820 dev->fw_version.build = FIELD_GET(KVASER_USB_SW_VERSION_BUILD_MASK,
821 fw_version);
822 dev->max_tx_urbs =
823 le16_to_cpu(cmd.u.usbcan.softinfo.max_outstanding_tx);
824 dev->cfg = &kvaser_usb_leaf_usbcan_dev_cfg;
825 break;
826 }
827
828 return 0;
829 }
830
kvaser_usb_leaf_get_software_info(struct kvaser_usb * dev)831 static int kvaser_usb_leaf_get_software_info(struct kvaser_usb *dev)
832 {
833 int err;
834 int retry = 3;
835
836 /* On some x86 laptops, plugging a Kvaser device again after
837 * an unplug makes the firmware always ignore the very first
838 * command. For such a case, provide some room for retries
839 * instead of completely exiting the driver.
840 */
841 do {
842 err = kvaser_usb_leaf_get_software_info_inner(dev);
843 } while (--retry && err == -ETIMEDOUT);
844
845 return err;
846 }
847
kvaser_usb_leaf_get_card_info(struct kvaser_usb * dev)848 static int kvaser_usb_leaf_get_card_info(struct kvaser_usb *dev)
849 {
850 struct kvaser_cmd cmd;
851 int err;
852
853 err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_CARD_INFO, 0);
854 if (err)
855 return err;
856
857 err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CARD_INFO_REPLY, &cmd);
858 if (err)
859 return err;
860
861 dev->nchannels = cmd.u.cardinfo.nchannels;
862 if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES ||
863 (dev->driver_info->family == KVASER_USBCAN &&
864 dev->nchannels > MAX_USBCAN_NET_DEVICES))
865 return -EINVAL;
866 dev->ean[1] = le32_to_cpu(cmd.u.cardinfo.ean[1]);
867 dev->ean[0] = le32_to_cpu(cmd.u.cardinfo.ean[0]);
868 dev->serial_number = le32_to_cpu(cmd.u.cardinfo.serial_number);
869 dev->hw_revision = cmd.u.cardinfo.hw_revision;
870
871 return 0;
872 }
873
kvaser_usb_leaf_get_single_capability(struct kvaser_usb * dev,u16 cap_cmd_req,u16 * status)874 static int kvaser_usb_leaf_get_single_capability(struct kvaser_usb *dev,
875 u16 cap_cmd_req, u16 *status)
876 {
877 struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
878 struct kvaser_cmd *cmd;
879 u32 value = 0;
880 u32 mask = 0;
881 u16 cap_cmd_res;
882 int err;
883 int i;
884
885 cmd = kzalloc_obj(*cmd);
886 if (!cmd)
887 return -ENOMEM;
888
889 cmd->id = CMD_GET_CAPABILITIES_REQ;
890 cmd->u.leaf.cap_req.cap_cmd = cpu_to_le16(cap_cmd_req);
891 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_cap_req);
892
893 err = kvaser_usb_send_cmd(dev, cmd, cmd->len);
894 if (err)
895 goto end;
896
897 err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CAPABILITIES_RESP, cmd);
898 if (err)
899 goto end;
900
901 *status = le16_to_cpu(cmd->u.leaf.cap_res.status);
902
903 if (*status != KVASER_USB_LEAF_CAP_STAT_OK)
904 goto end;
905
906 cap_cmd_res = le16_to_cpu(cmd->u.leaf.cap_res.cap_cmd);
907 switch (cap_cmd_res) {
908 case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE:
909 case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT:
910 value = le32_to_cpu(cmd->u.leaf.cap_res.value);
911 mask = le32_to_cpu(cmd->u.leaf.cap_res.mask);
912 break;
913 default:
914 dev_warn(&dev->intf->dev, "Unknown capability command %u\n",
915 cap_cmd_res);
916 break;
917 }
918
919 for (i = 0; i < dev->nchannels; i++) {
920 if (BIT(i) & (value & mask)) {
921 switch (cap_cmd_res) {
922 case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE:
923 card_data->ctrlmode_supported |=
924 CAN_CTRLMODE_LISTENONLY;
925 break;
926 case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT:
927 card_data->capabilities |=
928 KVASER_USB_CAP_BERR_CAP;
929 break;
930 }
931 }
932 }
933
934 end:
935 kfree(cmd);
936
937 return err;
938 }
939
kvaser_usb_leaf_get_capabilities_leaf(struct kvaser_usb * dev)940 static int kvaser_usb_leaf_get_capabilities_leaf(struct kvaser_usb *dev)
941 {
942 int err;
943 u16 status;
944
945 if (!(dev->card_data.capabilities & KVASER_USB_CAP_EXT_CAP)) {
946 dev_info(&dev->intf->dev,
947 "No extended capability support. Upgrade device firmware.\n");
948 return 0;
949 }
950
951 err = kvaser_usb_leaf_get_single_capability(dev,
952 KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE,
953 &status);
954 if (err)
955 return err;
956 if (status)
957 dev_info(&dev->intf->dev,
958 "KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE failed %u\n",
959 status);
960
961 err = kvaser_usb_leaf_get_single_capability(dev,
962 KVASER_USB_LEAF_CAP_CMD_ERR_REPORT,
963 &status);
964 if (err)
965 return err;
966 if (status)
967 dev_info(&dev->intf->dev,
968 "KVASER_USB_LEAF_CAP_CMD_ERR_REPORT failed %u\n",
969 status);
970
971 return 0;
972 }
973
kvaser_usb_leaf_set_led(struct kvaser_usb_net_priv * priv,enum kvaser_usb_led_state state,u16 duration_ms)974 static int kvaser_usb_leaf_set_led(struct kvaser_usb_net_priv *priv,
975 enum kvaser_usb_led_state state,
976 u16 duration_ms)
977 {
978 struct kvaser_usb *dev = priv->dev;
979 struct kvaser_cmd *cmd;
980 int ret;
981
982 cmd = kzalloc_obj(*cmd);
983 if (!cmd)
984 return -ENOMEM;
985
986 cmd->id = CMD_LED_ACTION_REQ;
987 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_led_action_req);
988 cmd->u.led_action_req.tid = 0xff;
989
990 cmd->u.led_action_req.duration_ms = cpu_to_le16(duration_ms);
991 cmd->u.led_action_req.action = state |
992 FIELD_PREP(KVASER_USB_LEAF_LED_IDX_MASK,
993 KVASER_USB_LEAF_LED_YELLOW_CH0_IDX +
994 priv->channel);
995
996 ret = kvaser_usb_send_cmd(dev, cmd, cmd->len);
997 kfree(cmd);
998
999 return ret;
1000 }
1001
kvaser_usb_leaf_get_capabilities(struct kvaser_usb * dev)1002 static int kvaser_usb_leaf_get_capabilities(struct kvaser_usb *dev)
1003 {
1004 int err = 0;
1005
1006 if (dev->driver_info->family == KVASER_LEAF)
1007 err = kvaser_usb_leaf_get_capabilities_leaf(dev);
1008
1009 return err;
1010 }
1011
kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1012 static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev,
1013 const struct kvaser_cmd *cmd)
1014 {
1015 struct net_device_stats *stats;
1016 struct kvaser_usb_tx_urb_context *context;
1017 struct kvaser_usb_net_priv *priv;
1018 unsigned long flags;
1019 u8 channel, tid;
1020 struct sk_buff *skb;
1021 ktime_t hwtstamp = 0;
1022
1023 channel = cmd->u.tx_acknowledge_header.channel;
1024 tid = cmd->u.tx_acknowledge_header.tid;
1025
1026 if (channel >= dev->nchannels) {
1027 dev_err(&dev->intf->dev,
1028 "Invalid channel number (%d)\n", channel);
1029 return;
1030 }
1031
1032 priv = dev->nets[channel];
1033
1034 if (!netif_device_present(priv->netdev))
1035 return;
1036
1037 stats = &priv->netdev->stats;
1038
1039 context = &priv->tx_contexts[tid % dev->max_tx_urbs];
1040
1041 /* Sometimes the state change doesn't come after a bus-off event */
1042 if (priv->can.restart_ms && priv->can.state == CAN_STATE_BUS_OFF) {
1043 struct sk_buff *err_skb;
1044 struct can_frame *cf;
1045
1046 err_skb = alloc_can_err_skb(priv->netdev, &cf);
1047 if (err_skb) {
1048 cf->can_id |= CAN_ERR_RESTARTED;
1049
1050 netif_rx(err_skb);
1051 } else {
1052 netdev_err(priv->netdev,
1053 "No memory left for err_skb\n");
1054 }
1055
1056 priv->can.can_stats.restarts++;
1057 netif_carrier_on(priv->netdev);
1058
1059 priv->can.state = CAN_STATE_ERROR_ACTIVE;
1060 }
1061 switch (dev->driver_info->family) {
1062 case KVASER_LEAF:
1063 hwtstamp = kvaser_usb_timestamp48_to_ktime(dev->cfg, cmd->u.leaf.tx_ack.time);
1064 break;
1065 case KVASER_USBCAN:
1066 hwtstamp = kvaser_usb_usbcan_timestamp_to_ktime(dev, cmd->u.usbcan.tx_ack.time);
1067 break;
1068 }
1069
1070 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
1071
1072 skb = priv->can.echo_skb[context->echo_index];
1073 if (skb)
1074 skb_hwtstamps(skb)->hwtstamp = hwtstamp;
1075 stats->tx_packets++;
1076 stats->tx_bytes += can_get_echo_skb(priv->netdev,
1077 context->echo_index, NULL);
1078 context->echo_index = dev->max_tx_urbs;
1079 --priv->active_tx_contexts;
1080 netif_wake_queue(priv->netdev);
1081
1082 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
1083 }
1084
kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv * priv,u8 cmd_id)1085 static int kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv *priv,
1086 u8 cmd_id)
1087 {
1088 struct kvaser_cmd *cmd;
1089 int err;
1090
1091 cmd = kzalloc_obj(*cmd, GFP_ATOMIC);
1092 if (!cmd)
1093 return -ENOMEM;
1094
1095 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple);
1096 cmd->id = cmd_id;
1097 cmd->u.simple.channel = priv->channel;
1098
1099 err = kvaser_usb_send_cmd_async(priv, cmd, cmd->len);
1100 if (err)
1101 kfree(cmd);
1102
1103 return err;
1104 }
1105
kvaser_usb_leaf_chip_state_req_work(struct work_struct * work)1106 static void kvaser_usb_leaf_chip_state_req_work(struct work_struct *work)
1107 {
1108 struct kvaser_usb_net_leaf_priv *leaf =
1109 container_of(work, struct kvaser_usb_net_leaf_priv,
1110 chip_state_req_work.work);
1111 struct kvaser_usb_net_priv *priv = leaf->net;
1112
1113 kvaser_usb_leaf_simple_cmd_async(priv, CMD_GET_CHIP_STATE);
1114 }
1115
1116 static void
kvaser_usb_leaf_rx_error_update_can_state(struct kvaser_usb_net_priv * priv,const struct kvaser_usb_err_summary * es,struct can_frame * cf)1117 kvaser_usb_leaf_rx_error_update_can_state(struct kvaser_usb_net_priv *priv,
1118 const struct kvaser_usb_err_summary *es,
1119 struct can_frame *cf)
1120 {
1121 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1122 struct kvaser_usb *dev = priv->dev;
1123 struct net_device_stats *stats = &priv->netdev->stats;
1124 enum can_state cur_state, new_state, tx_state, rx_state;
1125
1126 netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status);
1127
1128 new_state = priv->can.state;
1129 cur_state = priv->can.state;
1130
1131 if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {
1132 new_state = CAN_STATE_BUS_OFF;
1133 } else if (es->status & M16C_STATE_BUS_PASSIVE) {
1134 new_state = CAN_STATE_ERROR_PASSIVE;
1135 } else if ((es->status & M16C_STATE_BUS_ERROR) &&
1136 cur_state >= CAN_STATE_BUS_OFF) {
1137 /* Guard against spurious error events after a busoff */
1138 } else if (es->txerr >= 128 || es->rxerr >= 128) {
1139 new_state = CAN_STATE_ERROR_PASSIVE;
1140 } else if (es->txerr >= 96 || es->rxerr >= 96) {
1141 new_state = CAN_STATE_ERROR_WARNING;
1142 } else {
1143 new_state = CAN_STATE_ERROR_ACTIVE;
1144 }
1145
1146 /* 0bfd:0124 FW 4.18.778 was observed to send the initial
1147 * CMD_CHIP_STATE_EVENT after CMD_START_CHIP with M16C_STATE_BUS_OFF
1148 * bit set if the channel was bus-off when it was last stopped (even
1149 * across chip resets). This bit will clear shortly afterwards, without
1150 * triggering a second unsolicited chip state event.
1151 * Ignore this initial bus-off.
1152 */
1153 if (leaf->joining_bus) {
1154 if (new_state == CAN_STATE_BUS_OFF) {
1155 netdev_dbg(priv->netdev, "ignoring bus-off during startup");
1156 new_state = cur_state;
1157 } else {
1158 leaf->joining_bus = false;
1159 }
1160 }
1161
1162 if (new_state != cur_state) {
1163 tx_state = (es->txerr >= es->rxerr) ? new_state : 0;
1164 rx_state = (es->txerr <= es->rxerr) ? new_state : 0;
1165
1166 can_change_state(priv->netdev, cf, tx_state, rx_state);
1167 }
1168
1169 if (priv->can.restart_ms &&
1170 cur_state == CAN_STATE_BUS_OFF &&
1171 new_state < CAN_STATE_BUS_OFF)
1172 priv->can.can_stats.restarts++;
1173
1174 switch (dev->driver_info->family) {
1175 case KVASER_LEAF:
1176 if (es->leaf.error_factor) {
1177 priv->can.can_stats.bus_error++;
1178 stats->rx_errors++;
1179 }
1180 break;
1181 case KVASER_USBCAN:
1182 if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR)
1183 stats->tx_errors++;
1184 if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR)
1185 stats->rx_errors++;
1186 if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR)
1187 priv->can.can_stats.bus_error++;
1188 break;
1189 }
1190
1191 priv->bec.txerr = es->txerr;
1192 priv->bec.rxerr = es->rxerr;
1193 }
1194
kvaser_usb_leaf_rx_error(const struct kvaser_usb * dev,const struct kvaser_usb_err_summary * es)1195 static void kvaser_usb_leaf_rx_error(const struct kvaser_usb *dev,
1196 const struct kvaser_usb_err_summary *es)
1197 {
1198 struct can_frame *cf = NULL;
1199 struct sk_buff *skb = NULL;
1200 struct net_device_stats *stats;
1201 struct kvaser_usb_net_priv *priv;
1202 struct kvaser_usb_net_leaf_priv *leaf;
1203 enum can_state old_state, new_state;
1204
1205 if (es->channel >= dev->nchannels) {
1206 dev_err(&dev->intf->dev,
1207 "Invalid channel number (%d)\n", es->channel);
1208 return;
1209 }
1210
1211 priv = dev->nets[es->channel];
1212 leaf = priv->sub_priv;
1213 stats = &priv->netdev->stats;
1214
1215 /* Ignore e.g. state change to bus-off reported just after stopping */
1216 if (!netif_running(priv->netdev))
1217 return;
1218
1219 old_state = priv->can.state;
1220 if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
1221 skb = alloc_can_err_skb(priv->netdev, &cf);
1222 kvaser_usb_leaf_rx_error_update_can_state(priv, es, cf);
1223 new_state = priv->can.state;
1224
1225 /* If there are errors, request status updates periodically as we do
1226 * not get automatic notifications of improved state.
1227 * Also request updates if we saw a stale BUS_OFF during startup
1228 * (joining_bus).
1229 */
1230 if (new_state < CAN_STATE_BUS_OFF &&
1231 (es->rxerr || es->txerr || new_state == CAN_STATE_ERROR_PASSIVE ||
1232 leaf->joining_bus))
1233 schedule_delayed_work(&leaf->chip_state_req_work,
1234 msecs_to_jiffies(500));
1235
1236 if (new_state != old_state) {
1237 if (es->status &
1238 (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {
1239 if (!priv->can.restart_ms)
1240 kvaser_usb_leaf_simple_cmd_async(priv,
1241 CMD_STOP_CHIP);
1242 netif_carrier_off(priv->netdev);
1243 }
1244
1245 if (priv->can.restart_ms &&
1246 old_state == CAN_STATE_BUS_OFF &&
1247 new_state < CAN_STATE_BUS_OFF) {
1248 if (cf)
1249 cf->can_id |= CAN_ERR_RESTARTED;
1250 netif_carrier_on(priv->netdev);
1251 }
1252 }
1253
1254 if (!skb) {
1255 if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) {
1256 stats->rx_dropped++;
1257 netdev_warn(priv->netdev, "No memory left for err_skb\n");
1258 }
1259 return;
1260 }
1261
1262 switch (dev->driver_info->family) {
1263 case KVASER_LEAF:
1264 if (es->leaf.error_factor) {
1265 cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT;
1266
1267 if (es->leaf.error_factor & M16C_EF_ACKE)
1268 cf->data[3] = CAN_ERR_PROT_LOC_ACK;
1269 if (es->leaf.error_factor & M16C_EF_CRCE)
1270 cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;
1271 if (es->leaf.error_factor & M16C_EF_FORME)
1272 cf->data[2] |= CAN_ERR_PROT_FORM;
1273 if (es->leaf.error_factor & M16C_EF_STFE)
1274 cf->data[2] |= CAN_ERR_PROT_STUFF;
1275 if (es->leaf.error_factor & M16C_EF_BITE0)
1276 cf->data[2] |= CAN_ERR_PROT_BIT0;
1277 if (es->leaf.error_factor & M16C_EF_BITE1)
1278 cf->data[2] |= CAN_ERR_PROT_BIT1;
1279 if (es->leaf.error_factor & M16C_EF_TRE)
1280 cf->data[2] |= CAN_ERR_PROT_TX;
1281 }
1282 break;
1283 case KVASER_USBCAN:
1284 if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR)
1285 cf->can_id |= CAN_ERR_BUSERROR;
1286 break;
1287 }
1288
1289 if (new_state != CAN_STATE_BUS_OFF) {
1290 cf->can_id |= CAN_ERR_CNT;
1291 cf->data[6] = es->txerr;
1292 cf->data[7] = es->rxerr;
1293 }
1294
1295 netif_rx(skb);
1296 }
1297
1298 /* For USBCAN, report error to userspace if the channels's errors counter
1299 * has changed, or we're the only channel seeing a bus error state.
1300 */
1301 static void
kvaser_usb_leaf_usbcan_conditionally_rx_error(const struct kvaser_usb * dev,struct kvaser_usb_err_summary * es)1302 kvaser_usb_leaf_usbcan_conditionally_rx_error(const struct kvaser_usb *dev,
1303 struct kvaser_usb_err_summary *es)
1304 {
1305 struct kvaser_usb_net_priv *priv;
1306 unsigned int channel;
1307 bool report_error;
1308
1309 channel = es->channel;
1310 if (channel >= dev->nchannels) {
1311 dev_err(&dev->intf->dev,
1312 "Invalid channel number (%d)\n", channel);
1313 return;
1314 }
1315
1316 priv = dev->nets[channel];
1317 report_error = false;
1318
1319 if (es->txerr != priv->bec.txerr) {
1320 es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR;
1321 report_error = true;
1322 }
1323 if (es->rxerr != priv->bec.rxerr) {
1324 es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR;
1325 report_error = true;
1326 }
1327 if ((es->status & M16C_STATE_BUS_ERROR) &&
1328 !(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) {
1329 es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR;
1330 report_error = true;
1331 }
1332
1333 if (report_error)
1334 kvaser_usb_leaf_rx_error(dev, es);
1335 }
1336
kvaser_usb_leaf_usbcan_rx_error(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1337 static void kvaser_usb_leaf_usbcan_rx_error(const struct kvaser_usb *dev,
1338 const struct kvaser_cmd *cmd)
1339 {
1340 struct kvaser_usb_err_summary es = { };
1341
1342 switch (cmd->id) {
1343 /* Sometimes errors are sent as unsolicited chip state events */
1344 case CMD_CHIP_STATE_EVENT:
1345 es.channel = cmd->u.usbcan.chip_state_event.channel;
1346 es.status = cmd->u.usbcan.chip_state_event.status;
1347 es.txerr = cmd->u.usbcan.chip_state_event.tx_errors_count;
1348 es.rxerr = cmd->u.usbcan.chip_state_event.rx_errors_count;
1349 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
1350 break;
1351
1352 case CMD_CAN_ERROR_EVENT:
1353 es.channel = 0;
1354 es.status = cmd->u.usbcan.can_error_event.status_ch0;
1355 es.txerr = cmd->u.usbcan.can_error_event.tx_errors_count_ch0;
1356 es.rxerr = cmd->u.usbcan.can_error_event.rx_errors_count_ch0;
1357 es.usbcan.other_ch_status =
1358 cmd->u.usbcan.can_error_event.status_ch1;
1359 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
1360
1361 /* The USBCAN firmware supports up to 2 channels.
1362 * Now that ch0 was checked, check if ch1 has any errors.
1363 */
1364 if (dev->nchannels == MAX_USBCAN_NET_DEVICES) {
1365 es.channel = 1;
1366 es.status = cmd->u.usbcan.can_error_event.status_ch1;
1367 es.txerr =
1368 cmd->u.usbcan.can_error_event.tx_errors_count_ch1;
1369 es.rxerr =
1370 cmd->u.usbcan.can_error_event.rx_errors_count_ch1;
1371 es.usbcan.other_ch_status =
1372 cmd->u.usbcan.can_error_event.status_ch0;
1373 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
1374 }
1375 break;
1376
1377 default:
1378 dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id);
1379 }
1380 }
1381
kvaser_usb_leaf_leaf_rx_error(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1382 static void kvaser_usb_leaf_leaf_rx_error(const struct kvaser_usb *dev,
1383 const struct kvaser_cmd *cmd)
1384 {
1385 struct kvaser_usb_err_summary es = { };
1386
1387 switch (cmd->id) {
1388 case CMD_CAN_ERROR_EVENT:
1389 es.channel = cmd->u.leaf.can_error_event.channel;
1390 es.status = cmd->u.leaf.can_error_event.status;
1391 es.txerr = cmd->u.leaf.can_error_event.tx_errors_count;
1392 es.rxerr = cmd->u.leaf.can_error_event.rx_errors_count;
1393 es.leaf.error_factor = cmd->u.leaf.can_error_event.error_factor;
1394 break;
1395 case CMD_LEAF_LOG_MESSAGE:
1396 es.channel = cmd->u.leaf.log_message.channel;
1397 es.status = cmd->u.leaf.log_message.data[0];
1398 es.txerr = cmd->u.leaf.log_message.data[2];
1399 es.rxerr = cmd->u.leaf.log_message.data[3];
1400 es.leaf.error_factor = cmd->u.leaf.log_message.data[1];
1401 break;
1402 case CMD_CHIP_STATE_EVENT:
1403 es.channel = cmd->u.leaf.chip_state_event.channel;
1404 es.status = cmd->u.leaf.chip_state_event.status;
1405 es.txerr = cmd->u.leaf.chip_state_event.tx_errors_count;
1406 es.rxerr = cmd->u.leaf.chip_state_event.rx_errors_count;
1407 es.leaf.error_factor = 0;
1408 break;
1409 default:
1410 dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id);
1411 return;
1412 }
1413
1414 kvaser_usb_leaf_rx_error(dev, &es);
1415 }
1416
kvaser_usb_leaf_rx_can_err(const struct kvaser_usb_net_priv * priv,const struct kvaser_cmd * cmd)1417 static void kvaser_usb_leaf_rx_can_err(const struct kvaser_usb_net_priv *priv,
1418 const struct kvaser_cmd *cmd)
1419 {
1420 if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |
1421 MSG_FLAG_NERR)) {
1422 struct net_device_stats *stats = &priv->netdev->stats;
1423
1424 netdev_err(priv->netdev, "Unknown error (flags: 0x%02x)\n",
1425 cmd->u.rx_can_header.flag);
1426
1427 stats->rx_errors++;
1428 return;
1429 }
1430
1431 if (cmd->u.rx_can_header.flag & MSG_FLAG_OVERRUN)
1432 kvaser_usb_can_rx_over_error(priv->netdev);
1433 }
1434
kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1435 static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev,
1436 const struct kvaser_cmd *cmd)
1437 {
1438 struct kvaser_usb_net_priv *priv;
1439 struct can_frame *cf;
1440 struct sk_buff *skb;
1441 struct net_device_stats *stats;
1442 u8 channel = cmd->u.rx_can_header.channel;
1443 const u8 *rx_data = NULL; /* GCC */
1444 ktime_t hwtstamp = 0;
1445
1446 if (channel >= dev->nchannels) {
1447 dev_err(&dev->intf->dev,
1448 "Invalid channel number (%d)\n", channel);
1449 return;
1450 }
1451
1452 priv = dev->nets[channel];
1453 stats = &priv->netdev->stats;
1454
1455 if ((cmd->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) &&
1456 (dev->driver_info->family == KVASER_LEAF &&
1457 cmd->id == CMD_LEAF_LOG_MESSAGE)) {
1458 kvaser_usb_leaf_leaf_rx_error(dev, cmd);
1459 return;
1460 } else if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |
1461 MSG_FLAG_NERR |
1462 MSG_FLAG_OVERRUN)) {
1463 kvaser_usb_leaf_rx_can_err(priv, cmd);
1464 return;
1465 } else if (cmd->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) {
1466 netdev_warn(priv->netdev,
1467 "Unhandled frame (flags: 0x%02x)\n",
1468 cmd->u.rx_can_header.flag);
1469 return;
1470 }
1471
1472 switch (dev->driver_info->family) {
1473 case KVASER_LEAF:
1474 rx_data = cmd->u.leaf.rx_can.data;
1475 hwtstamp = kvaser_usb_timestamp48_to_ktime(dev->cfg, cmd->u.leaf.rx_can.time);
1476 break;
1477 case KVASER_USBCAN:
1478 rx_data = cmd->u.usbcan.rx_can.data;
1479 hwtstamp = kvaser_usb_usbcan_timestamp_to_ktime(dev, cmd->u.usbcan.rx_can.time);
1480 break;
1481 }
1482
1483 skb = alloc_can_skb(priv->netdev, &cf);
1484 if (!skb) {
1485 stats->rx_dropped++;
1486 return;
1487 }
1488
1489 if (dev->driver_info->family == KVASER_LEAF && cmd->id ==
1490 CMD_LEAF_LOG_MESSAGE) {
1491 cf->can_id = le32_to_cpu(cmd->u.leaf.log_message.id);
1492 if (cf->can_id & KVASER_EXTENDED_FRAME)
1493 cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG;
1494 else
1495 cf->can_id &= CAN_SFF_MASK;
1496
1497 can_frame_set_cc_len(cf, cmd->u.leaf.log_message.dlc & 0xF, priv->can.ctrlmode);
1498
1499 if (cmd->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME)
1500 cf->can_id |= CAN_RTR_FLAG;
1501 else
1502 memcpy(cf->data, &cmd->u.leaf.log_message.data,
1503 cf->len);
1504 } else {
1505 cf->can_id = ((rx_data[0] & 0x1f) << 6) | (rx_data[1] & 0x3f);
1506
1507 if (cmd->id == CMD_RX_EXT_MESSAGE) {
1508 cf->can_id <<= 18;
1509 cf->can_id |= ((rx_data[2] & 0x0f) << 14) |
1510 ((rx_data[3] & 0xff) << 6) |
1511 (rx_data[4] & 0x3f);
1512 cf->can_id |= CAN_EFF_FLAG;
1513 }
1514
1515 can_frame_set_cc_len(cf, rx_data[5] & 0xF, priv->can.ctrlmode);
1516
1517 if (cmd->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME)
1518 cf->can_id |= CAN_RTR_FLAG;
1519 else
1520 memcpy(cf->data, &rx_data[6], cf->len);
1521 }
1522
1523 skb_hwtstamps(skb)->hwtstamp = hwtstamp;
1524 stats->rx_packets++;
1525 if (!(cf->can_id & CAN_RTR_FLAG))
1526 stats->rx_bytes += cf->len;
1527 netif_rx(skb);
1528 }
1529
kvaser_usb_leaf_error_event_parameter(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1530 static void kvaser_usb_leaf_error_event_parameter(const struct kvaser_usb *dev,
1531 const struct kvaser_cmd *cmd)
1532 {
1533 u16 info1 = 0;
1534
1535 switch (dev->driver_info->family) {
1536 case KVASER_LEAF:
1537 info1 = le16_to_cpu(cmd->u.leaf.error_event.info1);
1538 break;
1539 case KVASER_USBCAN:
1540 info1 = le16_to_cpu(cmd->u.usbcan.error_event.info1);
1541 break;
1542 }
1543
1544 /* info1 will contain the offending cmd_no */
1545 switch (info1) {
1546 case CMD_SET_CTRL_MODE:
1547 dev_warn(&dev->intf->dev,
1548 "CMD_SET_CTRL_MODE error in parameter\n");
1549 break;
1550
1551 case CMD_SET_BUS_PARAMS:
1552 dev_warn(&dev->intf->dev,
1553 "CMD_SET_BUS_PARAMS error in parameter\n");
1554 break;
1555
1556 default:
1557 dev_warn(&dev->intf->dev,
1558 "Unhandled parameter error event cmd_no (%u)\n",
1559 info1);
1560 break;
1561 }
1562 }
1563
kvaser_usb_leaf_error_event(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1564 static void kvaser_usb_leaf_error_event(const struct kvaser_usb *dev,
1565 const struct kvaser_cmd *cmd)
1566 {
1567 u8 error_code = 0;
1568
1569 switch (dev->driver_info->family) {
1570 case KVASER_LEAF:
1571 error_code = cmd->u.leaf.error_event.error_code;
1572 break;
1573 case KVASER_USBCAN:
1574 error_code = cmd->u.usbcan.error_event.error_code;
1575 break;
1576 }
1577
1578 switch (error_code) {
1579 case KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL:
1580 /* Received additional CAN message, when firmware TX queue is
1581 * already full. Something is wrong with the driver.
1582 * This should never happen!
1583 */
1584 dev_err(&dev->intf->dev,
1585 "Received error event TX_QUEUE_FULL\n");
1586 break;
1587 case KVASER_USB_LEAF_ERROR_EVENT_PARAM:
1588 kvaser_usb_leaf_error_event_parameter(dev, cmd);
1589 break;
1590
1591 default:
1592 dev_warn(&dev->intf->dev,
1593 "Unhandled error event (%d)\n", error_code);
1594 break;
1595 }
1596 }
1597
kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1598 static void kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb *dev,
1599 const struct kvaser_cmd *cmd)
1600 {
1601 struct kvaser_usb_net_priv *priv;
1602 u8 channel = cmd->u.simple.channel;
1603
1604 if (channel >= dev->nchannels) {
1605 dev_err(&dev->intf->dev,
1606 "Invalid channel number (%d)\n", channel);
1607 return;
1608 }
1609
1610 priv = dev->nets[channel];
1611
1612 if (completion_done(&priv->start_comp) &&
1613 netif_queue_stopped(priv->netdev)) {
1614 netif_wake_queue(priv->netdev);
1615 } else {
1616 netif_start_queue(priv->netdev);
1617 complete(&priv->start_comp);
1618 }
1619 }
1620
kvaser_usb_leaf_stop_chip_reply(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1621 static void kvaser_usb_leaf_stop_chip_reply(const struct kvaser_usb *dev,
1622 const struct kvaser_cmd *cmd)
1623 {
1624 struct kvaser_usb_net_priv *priv;
1625 u8 channel = cmd->u.simple.channel;
1626
1627 if (channel >= dev->nchannels) {
1628 dev_err(&dev->intf->dev,
1629 "Invalid channel number (%d)\n", channel);
1630 return;
1631 }
1632
1633 priv = dev->nets[channel];
1634
1635 complete(&priv->stop_comp);
1636 }
1637
kvaser_usb_leaf_get_busparams_reply(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1638 static void kvaser_usb_leaf_get_busparams_reply(const struct kvaser_usb *dev,
1639 const struct kvaser_cmd *cmd)
1640 {
1641 struct kvaser_usb_net_priv *priv;
1642 u8 channel = cmd->u.busparams.channel;
1643
1644 if (channel >= dev->nchannels) {
1645 dev_err(&dev->intf->dev,
1646 "Invalid channel number (%d)\n", channel);
1647 return;
1648 }
1649
1650 priv = dev->nets[channel];
1651 memcpy(&priv->busparams_nominal, &cmd->u.busparams.busparams,
1652 sizeof(priv->busparams_nominal));
1653
1654 complete(&priv->get_busparams_comp);
1655 }
1656
kvaser_usb_leaf_handle_command(struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1657 static void kvaser_usb_leaf_handle_command(struct kvaser_usb *dev,
1658 const struct kvaser_cmd *cmd)
1659 {
1660 if (kvaser_usb_leaf_verify_size(dev, cmd) < 0)
1661 return;
1662
1663 switch (cmd->id) {
1664 case CMD_START_CHIP_REPLY:
1665 kvaser_usb_leaf_start_chip_reply(dev, cmd);
1666 break;
1667
1668 case CMD_STOP_CHIP_REPLY:
1669 kvaser_usb_leaf_stop_chip_reply(dev, cmd);
1670 break;
1671
1672 case CMD_RX_STD_MESSAGE:
1673 case CMD_RX_EXT_MESSAGE:
1674 kvaser_usb_leaf_rx_can_msg(dev, cmd);
1675 break;
1676
1677 case CMD_LEAF_LOG_MESSAGE:
1678 if (dev->driver_info->family != KVASER_LEAF)
1679 goto warn;
1680 kvaser_usb_leaf_rx_can_msg(dev, cmd);
1681 break;
1682
1683 case CMD_CHIP_STATE_EVENT:
1684 case CMD_CAN_ERROR_EVENT:
1685 if (dev->driver_info->family == KVASER_LEAF)
1686 kvaser_usb_leaf_leaf_rx_error(dev, cmd);
1687 else
1688 kvaser_usb_leaf_usbcan_rx_error(dev, cmd);
1689 break;
1690
1691 case CMD_TX_ACKNOWLEDGE:
1692 kvaser_usb_leaf_tx_acknowledge(dev, cmd);
1693 break;
1694
1695 case CMD_ERROR_EVENT:
1696 kvaser_usb_leaf_error_event(dev, cmd);
1697 break;
1698
1699 case CMD_GET_BUS_PARAMS_REPLY:
1700 kvaser_usb_leaf_get_busparams_reply(dev, cmd);
1701 break;
1702
1703 case CMD_USBCAN_CLOCK_OVERFLOW_EVENT:
1704 if (dev->driver_info->family != KVASER_USBCAN)
1705 goto warn;
1706 dev->card_data.usbcan_timestamp_msb =
1707 le32_to_cpu(cmd->u.usbcan.clk_overflow_event.time) &
1708 KVASER_USB_USBCAN_CLK_OVERFLOW_MASK;
1709 break;
1710
1711 /* Ignored commands */
1712 case CMD_FLUSH_QUEUE_REPLY:
1713 if (dev->driver_info->family != KVASER_LEAF)
1714 goto warn;
1715 break;
1716 case CMD_LED_ACTION_RESP:
1717 break;
1718
1719 default:
1720 warn: dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", cmd->id);
1721 break;
1722 }
1723 }
1724
kvaser_usb_leaf_read_bulk_callback(struct kvaser_usb * dev,void * buf,int len)1725 static void kvaser_usb_leaf_read_bulk_callback(struct kvaser_usb *dev,
1726 void *buf, int len)
1727 {
1728 struct kvaser_cmd *cmd;
1729 int pos = 0;
1730
1731 while (pos <= len - CMD_HEADER_LEN) {
1732 cmd = buf + pos;
1733
1734 /* The Kvaser firmware can only read and write commands that
1735 * does not cross the USB's endpoint wMaxPacketSize boundary.
1736 * If a follow-up command crosses such boundary, firmware puts
1737 * a placeholder zero-length command in its place then aligns
1738 * the real command to the next max packet size.
1739 *
1740 * Handle such cases or we're going to miss a significant
1741 * number of events in case of a heavy rx load on the bus.
1742 */
1743 if (cmd->len == 0) {
1744 pos = round_up(pos + 1, le16_to_cpu
1745 (dev->bulk_in->wMaxPacketSize));
1746 continue;
1747 }
1748
1749 if (cmd->len < CMD_HEADER_LEN || cmd->len > len - pos) {
1750 dev_err_ratelimited(&dev->intf->dev, "Format error\n");
1751 break;
1752 }
1753
1754 kvaser_usb_leaf_handle_command(dev, cmd);
1755 pos += cmd->len;
1756 }
1757 }
1758
kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv * priv)1759 static int kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv *priv)
1760 {
1761 struct kvaser_cmd *cmd;
1762 int rc;
1763
1764 cmd = kzalloc_obj(*cmd);
1765 if (!cmd)
1766 return -ENOMEM;
1767
1768 cmd->id = CMD_SET_CTRL_MODE;
1769 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_ctrl_mode);
1770 cmd->u.ctrl_mode.tid = 0xff;
1771 cmd->u.ctrl_mode.channel = priv->channel;
1772
1773 if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
1774 cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT;
1775 else
1776 cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL;
1777
1778 rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len);
1779
1780 kfree(cmd);
1781 return rc;
1782 }
1783
kvaser_usb_leaf_start_chip(struct kvaser_usb_net_priv * priv)1784 static int kvaser_usb_leaf_start_chip(struct kvaser_usb_net_priv *priv)
1785 {
1786 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1787 int err;
1788
1789 leaf->joining_bus = true;
1790
1791 reinit_completion(&priv->start_comp);
1792
1793 err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_START_CHIP,
1794 priv->channel);
1795 if (err)
1796 return err;
1797
1798 if (!wait_for_completion_timeout(&priv->start_comp,
1799 msecs_to_jiffies(KVASER_USB_TIMEOUT)))
1800 return -ETIMEDOUT;
1801
1802 return 0;
1803 }
1804
kvaser_usb_leaf_stop_chip(struct kvaser_usb_net_priv * priv)1805 static int kvaser_usb_leaf_stop_chip(struct kvaser_usb_net_priv *priv)
1806 {
1807 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1808 int err;
1809
1810 reinit_completion(&priv->stop_comp);
1811
1812 cancel_delayed_work(&leaf->chip_state_req_work);
1813
1814 err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_STOP_CHIP,
1815 priv->channel);
1816 if (err)
1817 return err;
1818
1819 if (!wait_for_completion_timeout(&priv->stop_comp,
1820 msecs_to_jiffies(KVASER_USB_TIMEOUT)))
1821 return -ETIMEDOUT;
1822
1823 return 0;
1824 }
1825
kvaser_usb_leaf_reset_chip(struct kvaser_usb * dev,int channel)1826 static int kvaser_usb_leaf_reset_chip(struct kvaser_usb *dev, int channel)
1827 {
1828 return kvaser_usb_leaf_send_simple_cmd(dev, CMD_RESET_CHIP, channel);
1829 }
1830
kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv * priv)1831 static int kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv *priv)
1832 {
1833 struct kvaser_cmd *cmd;
1834 int rc;
1835
1836 cmd = kzalloc_obj(*cmd);
1837 if (!cmd)
1838 return -ENOMEM;
1839
1840 cmd->id = CMD_FLUSH_QUEUE;
1841 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_flush_queue);
1842 cmd->u.flush_queue.channel = priv->channel;
1843 cmd->u.flush_queue.flags = 0x00;
1844
1845 rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len);
1846
1847 kfree(cmd);
1848 return rc;
1849 }
1850
kvaser_usb_leaf_init_card(struct kvaser_usb * dev)1851 static int kvaser_usb_leaf_init_card(struct kvaser_usb *dev)
1852 {
1853 struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
1854
1855 card_data->ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
1856
1857 return 0;
1858 }
1859
kvaser_usb_leaf_init_channel(struct kvaser_usb_net_priv * priv)1860 static int kvaser_usb_leaf_init_channel(struct kvaser_usb_net_priv *priv)
1861 {
1862 struct kvaser_usb_net_leaf_priv *leaf;
1863
1864 leaf = devm_kzalloc(&priv->dev->intf->dev, sizeof(*leaf), GFP_KERNEL);
1865 if (!leaf)
1866 return -ENOMEM;
1867
1868 leaf->net = priv;
1869 INIT_DELAYED_WORK(&leaf->chip_state_req_work,
1870 kvaser_usb_leaf_chip_state_req_work);
1871
1872 priv->sub_priv = leaf;
1873
1874 return 0;
1875 }
1876
kvaser_usb_leaf_remove_channel(struct kvaser_usb_net_priv * priv)1877 static void kvaser_usb_leaf_remove_channel(struct kvaser_usb_net_priv *priv)
1878 {
1879 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1880
1881 if (leaf)
1882 cancel_delayed_work_sync(&leaf->chip_state_req_work);
1883 }
1884
kvaser_usb_leaf_set_bittiming(const struct net_device * netdev,const struct kvaser_usb_busparams * busparams)1885 static int kvaser_usb_leaf_set_bittiming(const struct net_device *netdev,
1886 const struct kvaser_usb_busparams *busparams)
1887 {
1888 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1889 struct kvaser_usb *dev = priv->dev;
1890 struct kvaser_cmd *cmd;
1891 int rc;
1892
1893 cmd = kmalloc_obj(*cmd);
1894 if (!cmd)
1895 return -ENOMEM;
1896
1897 cmd->id = CMD_SET_BUS_PARAMS;
1898 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_busparams);
1899 cmd->u.busparams.channel = priv->channel;
1900 cmd->u.busparams.tid = 0xff;
1901 memcpy(&cmd->u.busparams.busparams, busparams,
1902 sizeof(cmd->u.busparams.busparams));
1903
1904 rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);
1905
1906 kfree(cmd);
1907 return rc;
1908 }
1909
kvaser_usb_leaf_get_busparams(struct kvaser_usb_net_priv * priv)1910 static int kvaser_usb_leaf_get_busparams(struct kvaser_usb_net_priv *priv)
1911 {
1912 int err;
1913
1914 if (priv->dev->driver_info->family == KVASER_USBCAN)
1915 return -EOPNOTSUPP;
1916
1917 reinit_completion(&priv->get_busparams_comp);
1918
1919 err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_GET_BUS_PARAMS,
1920 priv->channel);
1921 if (err)
1922 return err;
1923
1924 if (!wait_for_completion_timeout(&priv->get_busparams_comp,
1925 msecs_to_jiffies(KVASER_USB_TIMEOUT)))
1926 return -ETIMEDOUT;
1927
1928 return 0;
1929 }
1930
kvaser_usb_leaf_set_mode(struct net_device * netdev,enum can_mode mode)1931 static int kvaser_usb_leaf_set_mode(struct net_device *netdev,
1932 enum can_mode mode)
1933 {
1934 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1935 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1936 int err;
1937
1938 switch (mode) {
1939 case CAN_MODE_START:
1940 kvaser_usb_unlink_tx_urbs(priv);
1941
1942 leaf->joining_bus = true;
1943
1944 err = kvaser_usb_leaf_simple_cmd_async(priv, CMD_START_CHIP);
1945 if (err)
1946 return err;
1947
1948 priv->can.state = CAN_STATE_ERROR_ACTIVE;
1949 break;
1950 default:
1951 return -EOPNOTSUPP;
1952 }
1953
1954 return 0;
1955 }
1956
kvaser_usb_leaf_get_berr_counter(const struct net_device * netdev,struct can_berr_counter * bec)1957 static int kvaser_usb_leaf_get_berr_counter(const struct net_device *netdev,
1958 struct can_berr_counter *bec)
1959 {
1960 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1961
1962 *bec = priv->bec;
1963
1964 return 0;
1965 }
1966
kvaser_usb_leaf_setup_endpoints(struct kvaser_usb * dev)1967 static int kvaser_usb_leaf_setup_endpoints(struct kvaser_usb *dev)
1968 {
1969 struct usb_host_interface *iface_desc;
1970 int ret;
1971
1972 iface_desc = dev->intf->cur_altsetting;
1973
1974 /* use first bulk endpoint for in and out */
1975 ret = usb_find_common_endpoints(iface_desc, &dev->bulk_in, &dev->bulk_out,
1976 NULL, NULL);
1977 if (ret)
1978 return -ENODEV;
1979
1980 return 0;
1981 }
1982
1983 const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops = {
1984 .dev_set_mode = kvaser_usb_leaf_set_mode,
1985 .dev_set_bittiming = kvaser_usb_leaf_set_bittiming,
1986 .dev_get_busparams = kvaser_usb_leaf_get_busparams,
1987 .dev_set_data_bittiming = NULL,
1988 .dev_get_data_busparams = NULL,
1989 .dev_get_berr_counter = kvaser_usb_leaf_get_berr_counter,
1990 .dev_setup_endpoints = kvaser_usb_leaf_setup_endpoints,
1991 .dev_init_card = kvaser_usb_leaf_init_card,
1992 .dev_init_channel = kvaser_usb_leaf_init_channel,
1993 .dev_remove_channel = kvaser_usb_leaf_remove_channel,
1994 .dev_get_software_info = kvaser_usb_leaf_get_software_info,
1995 .dev_get_software_details = NULL,
1996 .dev_get_card_info = kvaser_usb_leaf_get_card_info,
1997 .dev_get_capabilities = kvaser_usb_leaf_get_capabilities,
1998 .dev_set_led = kvaser_usb_leaf_set_led,
1999 .dev_set_opt_mode = kvaser_usb_leaf_set_opt_mode,
2000 .dev_start_chip = kvaser_usb_leaf_start_chip,
2001 .dev_stop_chip = kvaser_usb_leaf_stop_chip,
2002 .dev_reset_chip = kvaser_usb_leaf_reset_chip,
2003 .dev_flush_queue = kvaser_usb_leaf_flush_queue,
2004 .dev_read_bulk_callback = kvaser_usb_leaf_read_bulk_callback,
2005 .dev_frame_to_cmd = kvaser_usb_leaf_frame_to_cmd,
2006 };
2007