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(sizeof(*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,
689 le16_to_cpu
690 (dev->bulk_in->wMaxPacketSize));
691 continue;
692 }
693
694 if (pos + tmp->len > actual_len) {
695 dev_err_ratelimited(&dev->intf->dev,
696 "Format error\n");
697 break;
698 }
699
700 if (tmp->id == id) {
701 memcpy(cmd, tmp, tmp->len);
702 goto end;
703 }
704
705 pos += tmp->len;
706 }
707 } while (time_before(jiffies, to));
708
709 err = -EINVAL;
710
711 end:
712 kfree(buf);
713
714 if (err == 0)
715 err = kvaser_usb_leaf_verify_size(dev, cmd);
716
717 return err;
718 }
719
kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb * dev,u8 cmd_id,int channel)720 static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev,
721 u8 cmd_id, int channel)
722 {
723 struct kvaser_cmd *cmd;
724 int rc;
725
726 cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
727 if (!cmd)
728 return -ENOMEM;
729
730 cmd->id = cmd_id;
731 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple);
732 cmd->u.simple.channel = channel;
733 cmd->u.simple.tid = 0xff;
734
735 rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);
736
737 kfree(cmd);
738 return rc;
739 }
740
kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb * dev,const struct leaf_cmd_softinfo * softinfo)741 static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev,
742 const struct leaf_cmd_softinfo *softinfo)
743 {
744 u32 fw_version;
745 u32 sw_options = le32_to_cpu(softinfo->sw_options);
746
747 fw_version = le32_to_cpu(softinfo->fw_version);
748 dev->fw_version.major = FIELD_GET(KVASER_USB_SW_VERSION_MAJOR_MASK, fw_version);
749 dev->fw_version.minor = FIELD_GET(KVASER_USB_SW_VERSION_MINOR_MASK, fw_version);
750 dev->fw_version.build = FIELD_GET(KVASER_USB_SW_VERSION_BUILD_MASK, fw_version);
751 dev->max_tx_urbs = le16_to_cpu(softinfo->max_outstanding_tx);
752
753 if (sw_options & KVASER_USB_LEAF_SWOPTION_EXT_CAP)
754 dev->card_data.capabilities |= KVASER_USB_CAP_EXT_CAP;
755
756 if (dev->driver_info->quirks & KVASER_USB_QUIRK_IGNORE_CLK_FREQ) {
757 /* Firmware expects bittiming parameters calculated for 16MHz
758 * clock, regardless of the actual clock
759 * Though, the reported freq is used for timestamps
760 */
761 switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {
762 case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:
763 dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_16mhz;
764 break;
765 case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:
766 dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_24mhz;
767 break;
768 case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:
769 dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_32mhz;
770 break;
771 }
772 } else {
773 switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {
774 case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:
775 dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_16mhz;
776 break;
777 case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:
778 dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_24mhz;
779 break;
780 case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:
781 dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_32mhz;
782 break;
783 }
784 }
785 }
786
kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb * dev)787 static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev)
788 {
789 struct kvaser_cmd cmd;
790 int err;
791 u32 fw_version;
792
793 err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO, 0);
794 if (err)
795 return err;
796
797 err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_REPLY, &cmd);
798 if (err)
799 return err;
800
801 switch (dev->driver_info->family) {
802 case KVASER_LEAF:
803 kvaser_usb_leaf_get_software_info_leaf(dev, &cmd.u.leaf.softinfo);
804 break;
805 case KVASER_USBCAN:
806 fw_version = le32_to_cpu(cmd.u.usbcan.softinfo.fw_version);
807 dev->fw_version.major = FIELD_GET(KVASER_USB_SW_VERSION_MAJOR_MASK,
808 fw_version);
809 dev->fw_version.minor = FIELD_GET(KVASER_USB_SW_VERSION_MINOR_MASK,
810 fw_version);
811 dev->fw_version.build = FIELD_GET(KVASER_USB_SW_VERSION_BUILD_MASK,
812 fw_version);
813 dev->max_tx_urbs =
814 le16_to_cpu(cmd.u.usbcan.softinfo.max_outstanding_tx);
815 dev->cfg = &kvaser_usb_leaf_usbcan_dev_cfg;
816 break;
817 }
818
819 return 0;
820 }
821
kvaser_usb_leaf_get_software_info(struct kvaser_usb * dev)822 static int kvaser_usb_leaf_get_software_info(struct kvaser_usb *dev)
823 {
824 int err;
825 int retry = 3;
826
827 /* On some x86 laptops, plugging a Kvaser device again after
828 * an unplug makes the firmware always ignore the very first
829 * command. For such a case, provide some room for retries
830 * instead of completely exiting the driver.
831 */
832 do {
833 err = kvaser_usb_leaf_get_software_info_inner(dev);
834 } while (--retry && err == -ETIMEDOUT);
835
836 return err;
837 }
838
kvaser_usb_leaf_get_card_info(struct kvaser_usb * dev)839 static int kvaser_usb_leaf_get_card_info(struct kvaser_usb *dev)
840 {
841 struct kvaser_cmd cmd;
842 int err;
843
844 err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_CARD_INFO, 0);
845 if (err)
846 return err;
847
848 err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CARD_INFO_REPLY, &cmd);
849 if (err)
850 return err;
851
852 dev->nchannels = cmd.u.cardinfo.nchannels;
853 if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES ||
854 (dev->driver_info->family == KVASER_USBCAN &&
855 dev->nchannels > MAX_USBCAN_NET_DEVICES))
856 return -EINVAL;
857 dev->ean[1] = le32_to_cpu(cmd.u.cardinfo.ean[1]);
858 dev->ean[0] = le32_to_cpu(cmd.u.cardinfo.ean[0]);
859 dev->serial_number = le32_to_cpu(cmd.u.cardinfo.serial_number);
860 dev->hw_revision = cmd.u.cardinfo.hw_revision;
861
862 return 0;
863 }
864
kvaser_usb_leaf_get_single_capability(struct kvaser_usb * dev,u16 cap_cmd_req,u16 * status)865 static int kvaser_usb_leaf_get_single_capability(struct kvaser_usb *dev,
866 u16 cap_cmd_req, u16 *status)
867 {
868 struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
869 struct kvaser_cmd *cmd;
870 u32 value = 0;
871 u32 mask = 0;
872 u16 cap_cmd_res;
873 int err;
874 int i;
875
876 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
877 if (!cmd)
878 return -ENOMEM;
879
880 cmd->id = CMD_GET_CAPABILITIES_REQ;
881 cmd->u.leaf.cap_req.cap_cmd = cpu_to_le16(cap_cmd_req);
882 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_cap_req);
883
884 err = kvaser_usb_send_cmd(dev, cmd, cmd->len);
885 if (err)
886 goto end;
887
888 err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CAPABILITIES_RESP, cmd);
889 if (err)
890 goto end;
891
892 *status = le16_to_cpu(cmd->u.leaf.cap_res.status);
893
894 if (*status != KVASER_USB_LEAF_CAP_STAT_OK)
895 goto end;
896
897 cap_cmd_res = le16_to_cpu(cmd->u.leaf.cap_res.cap_cmd);
898 switch (cap_cmd_res) {
899 case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE:
900 case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT:
901 value = le32_to_cpu(cmd->u.leaf.cap_res.value);
902 mask = le32_to_cpu(cmd->u.leaf.cap_res.mask);
903 break;
904 default:
905 dev_warn(&dev->intf->dev, "Unknown capability command %u\n",
906 cap_cmd_res);
907 break;
908 }
909
910 for (i = 0; i < dev->nchannels; i++) {
911 if (BIT(i) & (value & mask)) {
912 switch (cap_cmd_res) {
913 case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE:
914 card_data->ctrlmode_supported |=
915 CAN_CTRLMODE_LISTENONLY;
916 break;
917 case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT:
918 card_data->capabilities |=
919 KVASER_USB_CAP_BERR_CAP;
920 break;
921 }
922 }
923 }
924
925 end:
926 kfree(cmd);
927
928 return err;
929 }
930
kvaser_usb_leaf_get_capabilities_leaf(struct kvaser_usb * dev)931 static int kvaser_usb_leaf_get_capabilities_leaf(struct kvaser_usb *dev)
932 {
933 int err;
934 u16 status;
935
936 if (!(dev->card_data.capabilities & KVASER_USB_CAP_EXT_CAP)) {
937 dev_info(&dev->intf->dev,
938 "No extended capability support. Upgrade device firmware.\n");
939 return 0;
940 }
941
942 err = kvaser_usb_leaf_get_single_capability(dev,
943 KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE,
944 &status);
945 if (err)
946 return err;
947 if (status)
948 dev_info(&dev->intf->dev,
949 "KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE failed %u\n",
950 status);
951
952 err = kvaser_usb_leaf_get_single_capability(dev,
953 KVASER_USB_LEAF_CAP_CMD_ERR_REPORT,
954 &status);
955 if (err)
956 return err;
957 if (status)
958 dev_info(&dev->intf->dev,
959 "KVASER_USB_LEAF_CAP_CMD_ERR_REPORT failed %u\n",
960 status);
961
962 return 0;
963 }
964
kvaser_usb_leaf_set_led(struct kvaser_usb_net_priv * priv,enum kvaser_usb_led_state state,u16 duration_ms)965 static int kvaser_usb_leaf_set_led(struct kvaser_usb_net_priv *priv,
966 enum kvaser_usb_led_state state,
967 u16 duration_ms)
968 {
969 struct kvaser_usb *dev = priv->dev;
970 struct kvaser_cmd *cmd;
971 int ret;
972
973 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
974 if (!cmd)
975 return -ENOMEM;
976
977 cmd->id = CMD_LED_ACTION_REQ;
978 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_led_action_req);
979 cmd->u.led_action_req.tid = 0xff;
980
981 cmd->u.led_action_req.duration_ms = cpu_to_le16(duration_ms);
982 cmd->u.led_action_req.action = state |
983 FIELD_PREP(KVASER_USB_LEAF_LED_IDX_MASK,
984 KVASER_USB_LEAF_LED_YELLOW_CH0_IDX +
985 priv->channel);
986
987 ret = kvaser_usb_send_cmd(dev, cmd, cmd->len);
988 kfree(cmd);
989
990 return ret;
991 }
992
kvaser_usb_leaf_get_capabilities(struct kvaser_usb * dev)993 static int kvaser_usb_leaf_get_capabilities(struct kvaser_usb *dev)
994 {
995 int err = 0;
996
997 if (dev->driver_info->family == KVASER_LEAF)
998 err = kvaser_usb_leaf_get_capabilities_leaf(dev);
999
1000 return err;
1001 }
1002
kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1003 static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev,
1004 const struct kvaser_cmd *cmd)
1005 {
1006 struct net_device_stats *stats;
1007 struct kvaser_usb_tx_urb_context *context;
1008 struct kvaser_usb_net_priv *priv;
1009 unsigned long flags;
1010 u8 channel, tid;
1011 struct sk_buff *skb;
1012 ktime_t hwtstamp = 0;
1013
1014 channel = cmd->u.tx_acknowledge_header.channel;
1015 tid = cmd->u.tx_acknowledge_header.tid;
1016
1017 if (channel >= dev->nchannels) {
1018 dev_err(&dev->intf->dev,
1019 "Invalid channel number (%d)\n", channel);
1020 return;
1021 }
1022
1023 priv = dev->nets[channel];
1024
1025 if (!netif_device_present(priv->netdev))
1026 return;
1027
1028 stats = &priv->netdev->stats;
1029
1030 context = &priv->tx_contexts[tid % dev->max_tx_urbs];
1031
1032 /* Sometimes the state change doesn't come after a bus-off event */
1033 if (priv->can.restart_ms && priv->can.state == CAN_STATE_BUS_OFF) {
1034 struct sk_buff *err_skb;
1035 struct can_frame *cf;
1036
1037 err_skb = alloc_can_err_skb(priv->netdev, &cf);
1038 if (err_skb) {
1039 cf->can_id |= CAN_ERR_RESTARTED;
1040
1041 netif_rx(err_skb);
1042 } else {
1043 netdev_err(priv->netdev,
1044 "No memory left for err_skb\n");
1045 }
1046
1047 priv->can.can_stats.restarts++;
1048 netif_carrier_on(priv->netdev);
1049
1050 priv->can.state = CAN_STATE_ERROR_ACTIVE;
1051 }
1052 switch (dev->driver_info->family) {
1053 case KVASER_LEAF:
1054 hwtstamp = kvaser_usb_timestamp48_to_ktime(dev->cfg, cmd->u.leaf.tx_ack.time);
1055 break;
1056 case KVASER_USBCAN:
1057 hwtstamp = kvaser_usb_usbcan_timestamp_to_ktime(dev, cmd->u.usbcan.tx_ack.time);
1058 break;
1059 }
1060
1061 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
1062
1063 skb = priv->can.echo_skb[context->echo_index];
1064 if (skb)
1065 skb_hwtstamps(skb)->hwtstamp = hwtstamp;
1066 stats->tx_packets++;
1067 stats->tx_bytes += can_get_echo_skb(priv->netdev,
1068 context->echo_index, NULL);
1069 context->echo_index = dev->max_tx_urbs;
1070 --priv->active_tx_contexts;
1071 netif_wake_queue(priv->netdev);
1072
1073 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
1074 }
1075
kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv * priv,u8 cmd_id)1076 static int kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv *priv,
1077 u8 cmd_id)
1078 {
1079 struct kvaser_cmd *cmd;
1080 int err;
1081
1082 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
1083 if (!cmd)
1084 return -ENOMEM;
1085
1086 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple);
1087 cmd->id = cmd_id;
1088 cmd->u.simple.channel = priv->channel;
1089
1090 err = kvaser_usb_send_cmd_async(priv, cmd, cmd->len);
1091 if (err)
1092 kfree(cmd);
1093
1094 return err;
1095 }
1096
kvaser_usb_leaf_chip_state_req_work(struct work_struct * work)1097 static void kvaser_usb_leaf_chip_state_req_work(struct work_struct *work)
1098 {
1099 struct kvaser_usb_net_leaf_priv *leaf =
1100 container_of(work, struct kvaser_usb_net_leaf_priv,
1101 chip_state_req_work.work);
1102 struct kvaser_usb_net_priv *priv = leaf->net;
1103
1104 kvaser_usb_leaf_simple_cmd_async(priv, CMD_GET_CHIP_STATE);
1105 }
1106
1107 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)1108 kvaser_usb_leaf_rx_error_update_can_state(struct kvaser_usb_net_priv *priv,
1109 const struct kvaser_usb_err_summary *es,
1110 struct can_frame *cf)
1111 {
1112 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1113 struct kvaser_usb *dev = priv->dev;
1114 struct net_device_stats *stats = &priv->netdev->stats;
1115 enum can_state cur_state, new_state, tx_state, rx_state;
1116
1117 netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status);
1118
1119 new_state = priv->can.state;
1120 cur_state = priv->can.state;
1121
1122 if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {
1123 new_state = CAN_STATE_BUS_OFF;
1124 } else if (es->status & M16C_STATE_BUS_PASSIVE) {
1125 new_state = CAN_STATE_ERROR_PASSIVE;
1126 } else if ((es->status & M16C_STATE_BUS_ERROR) &&
1127 cur_state >= CAN_STATE_BUS_OFF) {
1128 /* Guard against spurious error events after a busoff */
1129 } else if (es->txerr >= 128 || es->rxerr >= 128) {
1130 new_state = CAN_STATE_ERROR_PASSIVE;
1131 } else if (es->txerr >= 96 || es->rxerr >= 96) {
1132 new_state = CAN_STATE_ERROR_WARNING;
1133 } else {
1134 new_state = CAN_STATE_ERROR_ACTIVE;
1135 }
1136
1137 /* 0bfd:0124 FW 4.18.778 was observed to send the initial
1138 * CMD_CHIP_STATE_EVENT after CMD_START_CHIP with M16C_STATE_BUS_OFF
1139 * bit set if the channel was bus-off when it was last stopped (even
1140 * across chip resets). This bit will clear shortly afterwards, without
1141 * triggering a second unsolicited chip state event.
1142 * Ignore this initial bus-off.
1143 */
1144 if (leaf->joining_bus) {
1145 if (new_state == CAN_STATE_BUS_OFF) {
1146 netdev_dbg(priv->netdev, "ignoring bus-off during startup");
1147 new_state = cur_state;
1148 } else {
1149 leaf->joining_bus = false;
1150 }
1151 }
1152
1153 if (new_state != cur_state) {
1154 tx_state = (es->txerr >= es->rxerr) ? new_state : 0;
1155 rx_state = (es->txerr <= es->rxerr) ? new_state : 0;
1156
1157 can_change_state(priv->netdev, cf, tx_state, rx_state);
1158 }
1159
1160 if (priv->can.restart_ms &&
1161 cur_state == CAN_STATE_BUS_OFF &&
1162 new_state < CAN_STATE_BUS_OFF)
1163 priv->can.can_stats.restarts++;
1164
1165 switch (dev->driver_info->family) {
1166 case KVASER_LEAF:
1167 if (es->leaf.error_factor) {
1168 priv->can.can_stats.bus_error++;
1169 stats->rx_errors++;
1170 }
1171 break;
1172 case KVASER_USBCAN:
1173 if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR)
1174 stats->tx_errors++;
1175 if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR)
1176 stats->rx_errors++;
1177 if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR)
1178 priv->can.can_stats.bus_error++;
1179 break;
1180 }
1181
1182 priv->bec.txerr = es->txerr;
1183 priv->bec.rxerr = es->rxerr;
1184 }
1185
kvaser_usb_leaf_rx_error(const struct kvaser_usb * dev,const struct kvaser_usb_err_summary * es)1186 static void kvaser_usb_leaf_rx_error(const struct kvaser_usb *dev,
1187 const struct kvaser_usb_err_summary *es)
1188 {
1189 struct can_frame *cf = NULL;
1190 struct sk_buff *skb = NULL;
1191 struct net_device_stats *stats;
1192 struct kvaser_usb_net_priv *priv;
1193 struct kvaser_usb_net_leaf_priv *leaf;
1194 enum can_state old_state, new_state;
1195
1196 if (es->channel >= dev->nchannels) {
1197 dev_err(&dev->intf->dev,
1198 "Invalid channel number (%d)\n", es->channel);
1199 return;
1200 }
1201
1202 priv = dev->nets[es->channel];
1203 leaf = priv->sub_priv;
1204 stats = &priv->netdev->stats;
1205
1206 /* Ignore e.g. state change to bus-off reported just after stopping */
1207 if (!netif_running(priv->netdev))
1208 return;
1209
1210 old_state = priv->can.state;
1211 if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
1212 skb = alloc_can_err_skb(priv->netdev, &cf);
1213 kvaser_usb_leaf_rx_error_update_can_state(priv, es, cf);
1214 new_state = priv->can.state;
1215
1216 /* If there are errors, request status updates periodically as we do
1217 * not get automatic notifications of improved state.
1218 * Also request updates if we saw a stale BUS_OFF during startup
1219 * (joining_bus).
1220 */
1221 if (new_state < CAN_STATE_BUS_OFF &&
1222 (es->rxerr || es->txerr || new_state == CAN_STATE_ERROR_PASSIVE ||
1223 leaf->joining_bus))
1224 schedule_delayed_work(&leaf->chip_state_req_work,
1225 msecs_to_jiffies(500));
1226
1227 if (new_state != old_state) {
1228 if (es->status &
1229 (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {
1230 if (!priv->can.restart_ms)
1231 kvaser_usb_leaf_simple_cmd_async(priv,
1232 CMD_STOP_CHIP);
1233 netif_carrier_off(priv->netdev);
1234 }
1235
1236 if (priv->can.restart_ms &&
1237 old_state == CAN_STATE_BUS_OFF &&
1238 new_state < CAN_STATE_BUS_OFF) {
1239 if (cf)
1240 cf->can_id |= CAN_ERR_RESTARTED;
1241 netif_carrier_on(priv->netdev);
1242 }
1243 }
1244
1245 if (!skb) {
1246 if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) {
1247 stats->rx_dropped++;
1248 netdev_warn(priv->netdev, "No memory left for err_skb\n");
1249 }
1250 return;
1251 }
1252
1253 switch (dev->driver_info->family) {
1254 case KVASER_LEAF:
1255 if (es->leaf.error_factor) {
1256 cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT;
1257
1258 if (es->leaf.error_factor & M16C_EF_ACKE)
1259 cf->data[3] = CAN_ERR_PROT_LOC_ACK;
1260 if (es->leaf.error_factor & M16C_EF_CRCE)
1261 cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;
1262 if (es->leaf.error_factor & M16C_EF_FORME)
1263 cf->data[2] |= CAN_ERR_PROT_FORM;
1264 if (es->leaf.error_factor & M16C_EF_STFE)
1265 cf->data[2] |= CAN_ERR_PROT_STUFF;
1266 if (es->leaf.error_factor & M16C_EF_BITE0)
1267 cf->data[2] |= CAN_ERR_PROT_BIT0;
1268 if (es->leaf.error_factor & M16C_EF_BITE1)
1269 cf->data[2] |= CAN_ERR_PROT_BIT1;
1270 if (es->leaf.error_factor & M16C_EF_TRE)
1271 cf->data[2] |= CAN_ERR_PROT_TX;
1272 }
1273 break;
1274 case KVASER_USBCAN:
1275 if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR)
1276 cf->can_id |= CAN_ERR_BUSERROR;
1277 break;
1278 }
1279
1280 if (new_state != CAN_STATE_BUS_OFF) {
1281 cf->can_id |= CAN_ERR_CNT;
1282 cf->data[6] = es->txerr;
1283 cf->data[7] = es->rxerr;
1284 }
1285
1286 netif_rx(skb);
1287 }
1288
1289 /* For USBCAN, report error to userspace if the channels's errors counter
1290 * has changed, or we're the only channel seeing a bus error state.
1291 */
1292 static void
kvaser_usb_leaf_usbcan_conditionally_rx_error(const struct kvaser_usb * dev,struct kvaser_usb_err_summary * es)1293 kvaser_usb_leaf_usbcan_conditionally_rx_error(const struct kvaser_usb *dev,
1294 struct kvaser_usb_err_summary *es)
1295 {
1296 struct kvaser_usb_net_priv *priv;
1297 unsigned int channel;
1298 bool report_error;
1299
1300 channel = es->channel;
1301 if (channel >= dev->nchannels) {
1302 dev_err(&dev->intf->dev,
1303 "Invalid channel number (%d)\n", channel);
1304 return;
1305 }
1306
1307 priv = dev->nets[channel];
1308 report_error = false;
1309
1310 if (es->txerr != priv->bec.txerr) {
1311 es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR;
1312 report_error = true;
1313 }
1314 if (es->rxerr != priv->bec.rxerr) {
1315 es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR;
1316 report_error = true;
1317 }
1318 if ((es->status & M16C_STATE_BUS_ERROR) &&
1319 !(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) {
1320 es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR;
1321 report_error = true;
1322 }
1323
1324 if (report_error)
1325 kvaser_usb_leaf_rx_error(dev, es);
1326 }
1327
kvaser_usb_leaf_usbcan_rx_error(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1328 static void kvaser_usb_leaf_usbcan_rx_error(const struct kvaser_usb *dev,
1329 const struct kvaser_cmd *cmd)
1330 {
1331 struct kvaser_usb_err_summary es = { };
1332
1333 switch (cmd->id) {
1334 /* Sometimes errors are sent as unsolicited chip state events */
1335 case CMD_CHIP_STATE_EVENT:
1336 es.channel = cmd->u.usbcan.chip_state_event.channel;
1337 es.status = cmd->u.usbcan.chip_state_event.status;
1338 es.txerr = cmd->u.usbcan.chip_state_event.tx_errors_count;
1339 es.rxerr = cmd->u.usbcan.chip_state_event.rx_errors_count;
1340 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
1341 break;
1342
1343 case CMD_CAN_ERROR_EVENT:
1344 es.channel = 0;
1345 es.status = cmd->u.usbcan.can_error_event.status_ch0;
1346 es.txerr = cmd->u.usbcan.can_error_event.tx_errors_count_ch0;
1347 es.rxerr = cmd->u.usbcan.can_error_event.rx_errors_count_ch0;
1348 es.usbcan.other_ch_status =
1349 cmd->u.usbcan.can_error_event.status_ch1;
1350 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
1351
1352 /* The USBCAN firmware supports up to 2 channels.
1353 * Now that ch0 was checked, check if ch1 has any errors.
1354 */
1355 if (dev->nchannels == MAX_USBCAN_NET_DEVICES) {
1356 es.channel = 1;
1357 es.status = cmd->u.usbcan.can_error_event.status_ch1;
1358 es.txerr =
1359 cmd->u.usbcan.can_error_event.tx_errors_count_ch1;
1360 es.rxerr =
1361 cmd->u.usbcan.can_error_event.rx_errors_count_ch1;
1362 es.usbcan.other_ch_status =
1363 cmd->u.usbcan.can_error_event.status_ch0;
1364 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
1365 }
1366 break;
1367
1368 default:
1369 dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id);
1370 }
1371 }
1372
kvaser_usb_leaf_leaf_rx_error(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1373 static void kvaser_usb_leaf_leaf_rx_error(const struct kvaser_usb *dev,
1374 const struct kvaser_cmd *cmd)
1375 {
1376 struct kvaser_usb_err_summary es = { };
1377
1378 switch (cmd->id) {
1379 case CMD_CAN_ERROR_EVENT:
1380 es.channel = cmd->u.leaf.can_error_event.channel;
1381 es.status = cmd->u.leaf.can_error_event.status;
1382 es.txerr = cmd->u.leaf.can_error_event.tx_errors_count;
1383 es.rxerr = cmd->u.leaf.can_error_event.rx_errors_count;
1384 es.leaf.error_factor = cmd->u.leaf.can_error_event.error_factor;
1385 break;
1386 case CMD_LEAF_LOG_MESSAGE:
1387 es.channel = cmd->u.leaf.log_message.channel;
1388 es.status = cmd->u.leaf.log_message.data[0];
1389 es.txerr = cmd->u.leaf.log_message.data[2];
1390 es.rxerr = cmd->u.leaf.log_message.data[3];
1391 es.leaf.error_factor = cmd->u.leaf.log_message.data[1];
1392 break;
1393 case CMD_CHIP_STATE_EVENT:
1394 es.channel = cmd->u.leaf.chip_state_event.channel;
1395 es.status = cmd->u.leaf.chip_state_event.status;
1396 es.txerr = cmd->u.leaf.chip_state_event.tx_errors_count;
1397 es.rxerr = cmd->u.leaf.chip_state_event.rx_errors_count;
1398 es.leaf.error_factor = 0;
1399 break;
1400 default:
1401 dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id);
1402 return;
1403 }
1404
1405 kvaser_usb_leaf_rx_error(dev, &es);
1406 }
1407
kvaser_usb_leaf_rx_can_err(const struct kvaser_usb_net_priv * priv,const struct kvaser_cmd * cmd)1408 static void kvaser_usb_leaf_rx_can_err(const struct kvaser_usb_net_priv *priv,
1409 const struct kvaser_cmd *cmd)
1410 {
1411 if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |
1412 MSG_FLAG_NERR)) {
1413 struct net_device_stats *stats = &priv->netdev->stats;
1414
1415 netdev_err(priv->netdev, "Unknown error (flags: 0x%02x)\n",
1416 cmd->u.rx_can_header.flag);
1417
1418 stats->rx_errors++;
1419 return;
1420 }
1421
1422 if (cmd->u.rx_can_header.flag & MSG_FLAG_OVERRUN)
1423 kvaser_usb_can_rx_over_error(priv->netdev);
1424 }
1425
kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1426 static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev,
1427 const struct kvaser_cmd *cmd)
1428 {
1429 struct kvaser_usb_net_priv *priv;
1430 struct can_frame *cf;
1431 struct sk_buff *skb;
1432 struct net_device_stats *stats;
1433 u8 channel = cmd->u.rx_can_header.channel;
1434 const u8 *rx_data = NULL; /* GCC */
1435 ktime_t hwtstamp = 0;
1436
1437 if (channel >= dev->nchannels) {
1438 dev_err(&dev->intf->dev,
1439 "Invalid channel number (%d)\n", channel);
1440 return;
1441 }
1442
1443 priv = dev->nets[channel];
1444 stats = &priv->netdev->stats;
1445
1446 if ((cmd->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) &&
1447 (dev->driver_info->family == KVASER_LEAF &&
1448 cmd->id == CMD_LEAF_LOG_MESSAGE)) {
1449 kvaser_usb_leaf_leaf_rx_error(dev, cmd);
1450 return;
1451 } else if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |
1452 MSG_FLAG_NERR |
1453 MSG_FLAG_OVERRUN)) {
1454 kvaser_usb_leaf_rx_can_err(priv, cmd);
1455 return;
1456 } else if (cmd->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) {
1457 netdev_warn(priv->netdev,
1458 "Unhandled frame (flags: 0x%02x)\n",
1459 cmd->u.rx_can_header.flag);
1460 return;
1461 }
1462
1463 switch (dev->driver_info->family) {
1464 case KVASER_LEAF:
1465 rx_data = cmd->u.leaf.rx_can.data;
1466 hwtstamp = kvaser_usb_timestamp48_to_ktime(dev->cfg, cmd->u.leaf.rx_can.time);
1467 break;
1468 case KVASER_USBCAN:
1469 rx_data = cmd->u.usbcan.rx_can.data;
1470 hwtstamp = kvaser_usb_usbcan_timestamp_to_ktime(dev, cmd->u.usbcan.rx_can.time);
1471 break;
1472 }
1473
1474 skb = alloc_can_skb(priv->netdev, &cf);
1475 if (!skb) {
1476 stats->rx_dropped++;
1477 return;
1478 }
1479
1480 if (dev->driver_info->family == KVASER_LEAF && cmd->id ==
1481 CMD_LEAF_LOG_MESSAGE) {
1482 cf->can_id = le32_to_cpu(cmd->u.leaf.log_message.id);
1483 if (cf->can_id & KVASER_EXTENDED_FRAME)
1484 cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG;
1485 else
1486 cf->can_id &= CAN_SFF_MASK;
1487
1488 can_frame_set_cc_len(cf, cmd->u.leaf.log_message.dlc & 0xF, priv->can.ctrlmode);
1489
1490 if (cmd->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME)
1491 cf->can_id |= CAN_RTR_FLAG;
1492 else
1493 memcpy(cf->data, &cmd->u.leaf.log_message.data,
1494 cf->len);
1495 } else {
1496 cf->can_id = ((rx_data[0] & 0x1f) << 6) | (rx_data[1] & 0x3f);
1497
1498 if (cmd->id == CMD_RX_EXT_MESSAGE) {
1499 cf->can_id <<= 18;
1500 cf->can_id |= ((rx_data[2] & 0x0f) << 14) |
1501 ((rx_data[3] & 0xff) << 6) |
1502 (rx_data[4] & 0x3f);
1503 cf->can_id |= CAN_EFF_FLAG;
1504 }
1505
1506 can_frame_set_cc_len(cf, rx_data[5] & 0xF, priv->can.ctrlmode);
1507
1508 if (cmd->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME)
1509 cf->can_id |= CAN_RTR_FLAG;
1510 else
1511 memcpy(cf->data, &rx_data[6], cf->len);
1512 }
1513
1514 skb_hwtstamps(skb)->hwtstamp = hwtstamp;
1515 stats->rx_packets++;
1516 if (!(cf->can_id & CAN_RTR_FLAG))
1517 stats->rx_bytes += cf->len;
1518 netif_rx(skb);
1519 }
1520
kvaser_usb_leaf_error_event_parameter(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1521 static void kvaser_usb_leaf_error_event_parameter(const struct kvaser_usb *dev,
1522 const struct kvaser_cmd *cmd)
1523 {
1524 u16 info1 = 0;
1525
1526 switch (dev->driver_info->family) {
1527 case KVASER_LEAF:
1528 info1 = le16_to_cpu(cmd->u.leaf.error_event.info1);
1529 break;
1530 case KVASER_USBCAN:
1531 info1 = le16_to_cpu(cmd->u.usbcan.error_event.info1);
1532 break;
1533 }
1534
1535 /* info1 will contain the offending cmd_no */
1536 switch (info1) {
1537 case CMD_SET_CTRL_MODE:
1538 dev_warn(&dev->intf->dev,
1539 "CMD_SET_CTRL_MODE error in parameter\n");
1540 break;
1541
1542 case CMD_SET_BUS_PARAMS:
1543 dev_warn(&dev->intf->dev,
1544 "CMD_SET_BUS_PARAMS error in parameter\n");
1545 break;
1546
1547 default:
1548 dev_warn(&dev->intf->dev,
1549 "Unhandled parameter error event cmd_no (%u)\n",
1550 info1);
1551 break;
1552 }
1553 }
1554
kvaser_usb_leaf_error_event(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1555 static void kvaser_usb_leaf_error_event(const struct kvaser_usb *dev,
1556 const struct kvaser_cmd *cmd)
1557 {
1558 u8 error_code = 0;
1559
1560 switch (dev->driver_info->family) {
1561 case KVASER_LEAF:
1562 error_code = cmd->u.leaf.error_event.error_code;
1563 break;
1564 case KVASER_USBCAN:
1565 error_code = cmd->u.usbcan.error_event.error_code;
1566 break;
1567 }
1568
1569 switch (error_code) {
1570 case KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL:
1571 /* Received additional CAN message, when firmware TX queue is
1572 * already full. Something is wrong with the driver.
1573 * This should never happen!
1574 */
1575 dev_err(&dev->intf->dev,
1576 "Received error event TX_QUEUE_FULL\n");
1577 break;
1578 case KVASER_USB_LEAF_ERROR_EVENT_PARAM:
1579 kvaser_usb_leaf_error_event_parameter(dev, cmd);
1580 break;
1581
1582 default:
1583 dev_warn(&dev->intf->dev,
1584 "Unhandled error event (%d)\n", error_code);
1585 break;
1586 }
1587 }
1588
kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1589 static void kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb *dev,
1590 const struct kvaser_cmd *cmd)
1591 {
1592 struct kvaser_usb_net_priv *priv;
1593 u8 channel = cmd->u.simple.channel;
1594
1595 if (channel >= dev->nchannels) {
1596 dev_err(&dev->intf->dev,
1597 "Invalid channel number (%d)\n", channel);
1598 return;
1599 }
1600
1601 priv = dev->nets[channel];
1602
1603 if (completion_done(&priv->start_comp) &&
1604 netif_queue_stopped(priv->netdev)) {
1605 netif_wake_queue(priv->netdev);
1606 } else {
1607 netif_start_queue(priv->netdev);
1608 complete(&priv->start_comp);
1609 }
1610 }
1611
kvaser_usb_leaf_stop_chip_reply(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1612 static void kvaser_usb_leaf_stop_chip_reply(const struct kvaser_usb *dev,
1613 const struct kvaser_cmd *cmd)
1614 {
1615 struct kvaser_usb_net_priv *priv;
1616 u8 channel = cmd->u.simple.channel;
1617
1618 if (channel >= dev->nchannels) {
1619 dev_err(&dev->intf->dev,
1620 "Invalid channel number (%d)\n", channel);
1621 return;
1622 }
1623
1624 priv = dev->nets[channel];
1625
1626 complete(&priv->stop_comp);
1627 }
1628
kvaser_usb_leaf_get_busparams_reply(const struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1629 static void kvaser_usb_leaf_get_busparams_reply(const struct kvaser_usb *dev,
1630 const struct kvaser_cmd *cmd)
1631 {
1632 struct kvaser_usb_net_priv *priv;
1633 u8 channel = cmd->u.busparams.channel;
1634
1635 if (channel >= dev->nchannels) {
1636 dev_err(&dev->intf->dev,
1637 "Invalid channel number (%d)\n", channel);
1638 return;
1639 }
1640
1641 priv = dev->nets[channel];
1642 memcpy(&priv->busparams_nominal, &cmd->u.busparams.busparams,
1643 sizeof(priv->busparams_nominal));
1644
1645 complete(&priv->get_busparams_comp);
1646 }
1647
kvaser_usb_leaf_handle_command(struct kvaser_usb * dev,const struct kvaser_cmd * cmd)1648 static void kvaser_usb_leaf_handle_command(struct kvaser_usb *dev,
1649 const struct kvaser_cmd *cmd)
1650 {
1651 if (kvaser_usb_leaf_verify_size(dev, cmd) < 0)
1652 return;
1653
1654 switch (cmd->id) {
1655 case CMD_START_CHIP_REPLY:
1656 kvaser_usb_leaf_start_chip_reply(dev, cmd);
1657 break;
1658
1659 case CMD_STOP_CHIP_REPLY:
1660 kvaser_usb_leaf_stop_chip_reply(dev, cmd);
1661 break;
1662
1663 case CMD_RX_STD_MESSAGE:
1664 case CMD_RX_EXT_MESSAGE:
1665 kvaser_usb_leaf_rx_can_msg(dev, cmd);
1666 break;
1667
1668 case CMD_LEAF_LOG_MESSAGE:
1669 if (dev->driver_info->family != KVASER_LEAF)
1670 goto warn;
1671 kvaser_usb_leaf_rx_can_msg(dev, cmd);
1672 break;
1673
1674 case CMD_CHIP_STATE_EVENT:
1675 case CMD_CAN_ERROR_EVENT:
1676 if (dev->driver_info->family == KVASER_LEAF)
1677 kvaser_usb_leaf_leaf_rx_error(dev, cmd);
1678 else
1679 kvaser_usb_leaf_usbcan_rx_error(dev, cmd);
1680 break;
1681
1682 case CMD_TX_ACKNOWLEDGE:
1683 kvaser_usb_leaf_tx_acknowledge(dev, cmd);
1684 break;
1685
1686 case CMD_ERROR_EVENT:
1687 kvaser_usb_leaf_error_event(dev, cmd);
1688 break;
1689
1690 case CMD_GET_BUS_PARAMS_REPLY:
1691 kvaser_usb_leaf_get_busparams_reply(dev, cmd);
1692 break;
1693
1694 case CMD_USBCAN_CLOCK_OVERFLOW_EVENT:
1695 if (dev->driver_info->family != KVASER_USBCAN)
1696 goto warn;
1697 dev->card_data.usbcan_timestamp_msb =
1698 le32_to_cpu(cmd->u.usbcan.clk_overflow_event.time) &
1699 KVASER_USB_USBCAN_CLK_OVERFLOW_MASK;
1700 break;
1701
1702 /* Ignored commands */
1703 case CMD_FLUSH_QUEUE_REPLY:
1704 if (dev->driver_info->family != KVASER_LEAF)
1705 goto warn;
1706 break;
1707 case CMD_LED_ACTION_RESP:
1708 break;
1709
1710 default:
1711 warn: dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", cmd->id);
1712 break;
1713 }
1714 }
1715
kvaser_usb_leaf_read_bulk_callback(struct kvaser_usb * dev,void * buf,int len)1716 static void kvaser_usb_leaf_read_bulk_callback(struct kvaser_usb *dev,
1717 void *buf, int len)
1718 {
1719 struct kvaser_cmd *cmd;
1720 int pos = 0;
1721
1722 while (pos <= len - CMD_HEADER_LEN) {
1723 cmd = buf + pos;
1724
1725 /* The Kvaser firmware can only read and write commands that
1726 * does not cross the USB's endpoint wMaxPacketSize boundary.
1727 * If a follow-up command crosses such boundary, firmware puts
1728 * a placeholder zero-length command in its place then aligns
1729 * the real command to the next max packet size.
1730 *
1731 * Handle such cases or we're going to miss a significant
1732 * number of events in case of a heavy rx load on the bus.
1733 */
1734 if (cmd->len == 0) {
1735 pos = round_up(pos, le16_to_cpu
1736 (dev->bulk_in->wMaxPacketSize));
1737 continue;
1738 }
1739
1740 if (pos + cmd->len > len) {
1741 dev_err_ratelimited(&dev->intf->dev, "Format error\n");
1742 break;
1743 }
1744
1745 kvaser_usb_leaf_handle_command(dev, cmd);
1746 pos += cmd->len;
1747 }
1748 }
1749
kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv * priv)1750 static int kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv *priv)
1751 {
1752 struct kvaser_cmd *cmd;
1753 int rc;
1754
1755 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1756 if (!cmd)
1757 return -ENOMEM;
1758
1759 cmd->id = CMD_SET_CTRL_MODE;
1760 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_ctrl_mode);
1761 cmd->u.ctrl_mode.tid = 0xff;
1762 cmd->u.ctrl_mode.channel = priv->channel;
1763
1764 if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
1765 cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT;
1766 else
1767 cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL;
1768
1769 rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len);
1770
1771 kfree(cmd);
1772 return rc;
1773 }
1774
kvaser_usb_leaf_start_chip(struct kvaser_usb_net_priv * priv)1775 static int kvaser_usb_leaf_start_chip(struct kvaser_usb_net_priv *priv)
1776 {
1777 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1778 int err;
1779
1780 leaf->joining_bus = true;
1781
1782 reinit_completion(&priv->start_comp);
1783
1784 err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_START_CHIP,
1785 priv->channel);
1786 if (err)
1787 return err;
1788
1789 if (!wait_for_completion_timeout(&priv->start_comp,
1790 msecs_to_jiffies(KVASER_USB_TIMEOUT)))
1791 return -ETIMEDOUT;
1792
1793 return 0;
1794 }
1795
kvaser_usb_leaf_stop_chip(struct kvaser_usb_net_priv * priv)1796 static int kvaser_usb_leaf_stop_chip(struct kvaser_usb_net_priv *priv)
1797 {
1798 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1799 int err;
1800
1801 reinit_completion(&priv->stop_comp);
1802
1803 cancel_delayed_work(&leaf->chip_state_req_work);
1804
1805 err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_STOP_CHIP,
1806 priv->channel);
1807 if (err)
1808 return err;
1809
1810 if (!wait_for_completion_timeout(&priv->stop_comp,
1811 msecs_to_jiffies(KVASER_USB_TIMEOUT)))
1812 return -ETIMEDOUT;
1813
1814 return 0;
1815 }
1816
kvaser_usb_leaf_reset_chip(struct kvaser_usb * dev,int channel)1817 static int kvaser_usb_leaf_reset_chip(struct kvaser_usb *dev, int channel)
1818 {
1819 return kvaser_usb_leaf_send_simple_cmd(dev, CMD_RESET_CHIP, channel);
1820 }
1821
kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv * priv)1822 static int kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv *priv)
1823 {
1824 struct kvaser_cmd *cmd;
1825 int rc;
1826
1827 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1828 if (!cmd)
1829 return -ENOMEM;
1830
1831 cmd->id = CMD_FLUSH_QUEUE;
1832 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_flush_queue);
1833 cmd->u.flush_queue.channel = priv->channel;
1834 cmd->u.flush_queue.flags = 0x00;
1835
1836 rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len);
1837
1838 kfree(cmd);
1839 return rc;
1840 }
1841
kvaser_usb_leaf_init_card(struct kvaser_usb * dev)1842 static int kvaser_usb_leaf_init_card(struct kvaser_usb *dev)
1843 {
1844 struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
1845
1846 card_data->ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
1847
1848 return 0;
1849 }
1850
kvaser_usb_leaf_init_channel(struct kvaser_usb_net_priv * priv)1851 static int kvaser_usb_leaf_init_channel(struct kvaser_usb_net_priv *priv)
1852 {
1853 struct kvaser_usb_net_leaf_priv *leaf;
1854
1855 leaf = devm_kzalloc(&priv->dev->intf->dev, sizeof(*leaf), GFP_KERNEL);
1856 if (!leaf)
1857 return -ENOMEM;
1858
1859 leaf->net = priv;
1860 INIT_DELAYED_WORK(&leaf->chip_state_req_work,
1861 kvaser_usb_leaf_chip_state_req_work);
1862
1863 priv->sub_priv = leaf;
1864
1865 return 0;
1866 }
1867
kvaser_usb_leaf_remove_channel(struct kvaser_usb_net_priv * priv)1868 static void kvaser_usb_leaf_remove_channel(struct kvaser_usb_net_priv *priv)
1869 {
1870 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1871
1872 if (leaf)
1873 cancel_delayed_work_sync(&leaf->chip_state_req_work);
1874 }
1875
kvaser_usb_leaf_set_bittiming(const struct net_device * netdev,const struct kvaser_usb_busparams * busparams)1876 static int kvaser_usb_leaf_set_bittiming(const struct net_device *netdev,
1877 const struct kvaser_usb_busparams *busparams)
1878 {
1879 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1880 struct kvaser_usb *dev = priv->dev;
1881 struct kvaser_cmd *cmd;
1882 int rc;
1883
1884 cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
1885 if (!cmd)
1886 return -ENOMEM;
1887
1888 cmd->id = CMD_SET_BUS_PARAMS;
1889 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_busparams);
1890 cmd->u.busparams.channel = priv->channel;
1891 cmd->u.busparams.tid = 0xff;
1892 memcpy(&cmd->u.busparams.busparams, busparams,
1893 sizeof(cmd->u.busparams.busparams));
1894
1895 rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);
1896
1897 kfree(cmd);
1898 return rc;
1899 }
1900
kvaser_usb_leaf_get_busparams(struct kvaser_usb_net_priv * priv)1901 static int kvaser_usb_leaf_get_busparams(struct kvaser_usb_net_priv *priv)
1902 {
1903 int err;
1904
1905 if (priv->dev->driver_info->family == KVASER_USBCAN)
1906 return -EOPNOTSUPP;
1907
1908 reinit_completion(&priv->get_busparams_comp);
1909
1910 err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_GET_BUS_PARAMS,
1911 priv->channel);
1912 if (err)
1913 return err;
1914
1915 if (!wait_for_completion_timeout(&priv->get_busparams_comp,
1916 msecs_to_jiffies(KVASER_USB_TIMEOUT)))
1917 return -ETIMEDOUT;
1918
1919 return 0;
1920 }
1921
kvaser_usb_leaf_set_mode(struct net_device * netdev,enum can_mode mode)1922 static int kvaser_usb_leaf_set_mode(struct net_device *netdev,
1923 enum can_mode mode)
1924 {
1925 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1926 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1927 int err;
1928
1929 switch (mode) {
1930 case CAN_MODE_START:
1931 kvaser_usb_unlink_tx_urbs(priv);
1932
1933 leaf->joining_bus = true;
1934
1935 err = kvaser_usb_leaf_simple_cmd_async(priv, CMD_START_CHIP);
1936 if (err)
1937 return err;
1938
1939 priv->can.state = CAN_STATE_ERROR_ACTIVE;
1940 break;
1941 default:
1942 return -EOPNOTSUPP;
1943 }
1944
1945 return 0;
1946 }
1947
kvaser_usb_leaf_get_berr_counter(const struct net_device * netdev,struct can_berr_counter * bec)1948 static int kvaser_usb_leaf_get_berr_counter(const struct net_device *netdev,
1949 struct can_berr_counter *bec)
1950 {
1951 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1952
1953 *bec = priv->bec;
1954
1955 return 0;
1956 }
1957
kvaser_usb_leaf_setup_endpoints(struct kvaser_usb * dev)1958 static int kvaser_usb_leaf_setup_endpoints(struct kvaser_usb *dev)
1959 {
1960 const struct usb_host_interface *iface_desc;
1961 struct usb_endpoint_descriptor *endpoint;
1962 int i;
1963
1964 iface_desc = dev->intf->cur_altsetting;
1965
1966 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1967 endpoint = &iface_desc->endpoint[i].desc;
1968
1969 if (!dev->bulk_in && usb_endpoint_is_bulk_in(endpoint))
1970 dev->bulk_in = endpoint;
1971
1972 if (!dev->bulk_out && usb_endpoint_is_bulk_out(endpoint))
1973 dev->bulk_out = endpoint;
1974
1975 /* use first bulk endpoint for in and out */
1976 if (dev->bulk_in && dev->bulk_out)
1977 return 0;
1978 }
1979
1980 return -ENODEV;
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