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080f40a6 OS |
1 | /* |
2 | * This program is free software; you can redistribute it and/or | |
3 | * modify it under the terms of the GNU General Public License as | |
4 | * published by the Free Software Foundation version 2. | |
5 | * | |
6 | * Parts of this driver are based on the following: | |
7 | * - Kvaser linux leaf driver (version 4.78) | |
8 | * - CAN driver for esd CAN-USB/2 | |
f5d4abea | 9 | * - Kvaser linux usbcanII driver (version 5.3) |
080f40a6 OS |
10 | * |
11 | * Copyright (C) 2002-2006 KVASER AB, Sweden. All rights reserved. | |
12 | * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh | |
13 | * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be> | |
a9ca6e13 | 14 | * Copyright (C) 2015 Valeo S.A. |
080f40a6 OS |
15 | */ |
16 | ||
2fec5104 | 17 | #include <linux/kernel.h> |
080f40a6 OS |
18 | #include <linux/completion.h> |
19 | #include <linux/module.h> | |
20 | #include <linux/netdevice.h> | |
21 | #include <linux/usb.h> | |
22 | ||
23 | #include <linux/can.h> | |
24 | #include <linux/can/dev.h> | |
25 | #include <linux/can/error.h> | |
26 | ||
27 | #define MAX_TX_URBS 16 | |
28 | #define MAX_RX_URBS 4 | |
29 | #define START_TIMEOUT 1000 /* msecs */ | |
30 | #define STOP_TIMEOUT 1000 /* msecs */ | |
31 | #define USB_SEND_TIMEOUT 1000 /* msecs */ | |
32 | #define USB_RECV_TIMEOUT 1000 /* msecs */ | |
33 | #define RX_BUFFER_SIZE 3072 | |
34 | #define CAN_USB_CLOCK 8000000 | |
35 | #define MAX_NET_DEVICES 3 | |
f5d4abea | 36 | #define MAX_USBCAN_NET_DEVICES 2 |
080f40a6 | 37 | |
f5d4abea | 38 | /* Kvaser Leaf USB devices */ |
080f40a6 OS |
39 | #define KVASER_VENDOR_ID 0x0bfd |
40 | #define USB_LEAF_DEVEL_PRODUCT_ID 10 | |
41 | #define USB_LEAF_LITE_PRODUCT_ID 11 | |
42 | #define USB_LEAF_PRO_PRODUCT_ID 12 | |
43 | #define USB_LEAF_SPRO_PRODUCT_ID 14 | |
44 | #define USB_LEAF_PRO_LS_PRODUCT_ID 15 | |
45 | #define USB_LEAF_PRO_SWC_PRODUCT_ID 16 | |
46 | #define USB_LEAF_PRO_LIN_PRODUCT_ID 17 | |
47 | #define USB_LEAF_SPRO_LS_PRODUCT_ID 18 | |
48 | #define USB_LEAF_SPRO_SWC_PRODUCT_ID 19 | |
49 | #define USB_MEMO2_DEVEL_PRODUCT_ID 22 | |
50 | #define USB_MEMO2_HSHS_PRODUCT_ID 23 | |
51 | #define USB_UPRO_HSHS_PRODUCT_ID 24 | |
52 | #define USB_LEAF_LITE_GI_PRODUCT_ID 25 | |
53 | #define USB_LEAF_PRO_OBDII_PRODUCT_ID 26 | |
54 | #define USB_MEMO2_HSLS_PRODUCT_ID 27 | |
55 | #define USB_LEAF_LITE_CH_PRODUCT_ID 28 | |
56 | #define USB_BLACKBIRD_SPRO_PRODUCT_ID 29 | |
57 | #define USB_OEM_MERCURY_PRODUCT_ID 34 | |
58 | #define USB_OEM_LEAF_PRODUCT_ID 35 | |
59 | #define USB_CAN_R_PRODUCT_ID 39 | |
b4f20130 OS |
60 | #define USB_LEAF_LITE_V2_PRODUCT_ID 288 |
61 | #define USB_MINI_PCIE_HS_PRODUCT_ID 289 | |
080f40a6 | 62 | |
f5d4abea AD |
63 | static inline bool kvaser_is_leaf(const struct usb_device_id *id) |
64 | { | |
65 | return id->idProduct >= USB_LEAF_DEVEL_PRODUCT_ID && | |
66 | id->idProduct <= USB_MINI_PCIE_HS_PRODUCT_ID; | |
67 | } | |
68 | ||
69 | /* Kvaser USBCan-II devices */ | |
70 | #define USB_USBCAN_REVB_PRODUCT_ID 2 | |
71 | #define USB_VCI2_PRODUCT_ID 3 | |
72 | #define USB_USBCAN2_PRODUCT_ID 4 | |
73 | #define USB_MEMORATOR_PRODUCT_ID 5 | |
74 | ||
75 | static inline bool kvaser_is_usbcan(const struct usb_device_id *id) | |
76 | { | |
77 | return id->idProduct >= USB_USBCAN_REVB_PRODUCT_ID && | |
78 | id->idProduct <= USB_MEMORATOR_PRODUCT_ID; | |
79 | } | |
80 | ||
080f40a6 OS |
81 | /* USB devices features */ |
82 | #define KVASER_HAS_SILENT_MODE BIT(0) | |
83 | #define KVASER_HAS_TXRX_ERRORS BIT(1) | |
84 | ||
85 | /* Message header size */ | |
86 | #define MSG_HEADER_LEN 2 | |
87 | ||
88 | /* Can message flags */ | |
89 | #define MSG_FLAG_ERROR_FRAME BIT(0) | |
90 | #define MSG_FLAG_OVERRUN BIT(1) | |
91 | #define MSG_FLAG_NERR BIT(2) | |
92 | #define MSG_FLAG_WAKEUP BIT(3) | |
93 | #define MSG_FLAG_REMOTE_FRAME BIT(4) | |
94 | #define MSG_FLAG_RESERVED BIT(5) | |
95 | #define MSG_FLAG_TX_ACK BIT(6) | |
96 | #define MSG_FLAG_TX_REQUEST BIT(7) | |
97 | ||
f5d4abea | 98 | /* Can states (M16C CxSTRH register) */ |
080f40a6 OS |
99 | #define M16C_STATE_BUS_RESET BIT(0) |
100 | #define M16C_STATE_BUS_ERROR BIT(4) | |
101 | #define M16C_STATE_BUS_PASSIVE BIT(5) | |
102 | #define M16C_STATE_BUS_OFF BIT(6) | |
103 | ||
104 | /* Can msg ids */ | |
105 | #define CMD_RX_STD_MESSAGE 12 | |
106 | #define CMD_TX_STD_MESSAGE 13 | |
107 | #define CMD_RX_EXT_MESSAGE 14 | |
108 | #define CMD_TX_EXT_MESSAGE 15 | |
109 | #define CMD_SET_BUS_PARAMS 16 | |
110 | #define CMD_GET_BUS_PARAMS 17 | |
111 | #define CMD_GET_BUS_PARAMS_REPLY 18 | |
112 | #define CMD_GET_CHIP_STATE 19 | |
113 | #define CMD_CHIP_STATE_EVENT 20 | |
114 | #define CMD_SET_CTRL_MODE 21 | |
115 | #define CMD_GET_CTRL_MODE 22 | |
116 | #define CMD_GET_CTRL_MODE_REPLY 23 | |
117 | #define CMD_RESET_CHIP 24 | |
118 | #define CMD_RESET_CARD 25 | |
119 | #define CMD_START_CHIP 26 | |
120 | #define CMD_START_CHIP_REPLY 27 | |
121 | #define CMD_STOP_CHIP 28 | |
122 | #define CMD_STOP_CHIP_REPLY 29 | |
f5d4abea AD |
123 | |
124 | #define CMD_LEAF_GET_CARD_INFO2 32 | |
125 | #define CMD_USBCAN_RESET_CLOCK 32 | |
126 | #define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 33 | |
127 | ||
080f40a6 OS |
128 | #define CMD_GET_CARD_INFO 34 |
129 | #define CMD_GET_CARD_INFO_REPLY 35 | |
130 | #define CMD_GET_SOFTWARE_INFO 38 | |
131 | #define CMD_GET_SOFTWARE_INFO_REPLY 39 | |
132 | #define CMD_ERROR_EVENT 45 | |
133 | #define CMD_FLUSH_QUEUE 48 | |
134 | #define CMD_RESET_ERROR_COUNTER 49 | |
135 | #define CMD_TX_ACKNOWLEDGE 50 | |
136 | #define CMD_CAN_ERROR_EVENT 51 | |
f5d4abea AD |
137 | |
138 | #define CMD_LEAF_USB_THROTTLE 77 | |
139 | #define CMD_LEAF_LOG_MESSAGE 106 | |
080f40a6 OS |
140 | |
141 | /* error factors */ | |
142 | #define M16C_EF_ACKE BIT(0) | |
143 | #define M16C_EF_CRCE BIT(1) | |
144 | #define M16C_EF_FORME BIT(2) | |
145 | #define M16C_EF_STFE BIT(3) | |
146 | #define M16C_EF_BITE0 BIT(4) | |
147 | #define M16C_EF_BITE1 BIT(5) | |
148 | #define M16C_EF_RCVE BIT(6) | |
149 | #define M16C_EF_TRE BIT(7) | |
150 | ||
f5d4abea AD |
151 | /* Only Leaf-based devices can report M16C error factors, |
152 | * thus define our own error status flags for USBCANII | |
153 | */ | |
154 | #define USBCAN_ERROR_STATE_NONE 0 | |
155 | #define USBCAN_ERROR_STATE_TX_ERROR BIT(0) | |
156 | #define USBCAN_ERROR_STATE_RX_ERROR BIT(1) | |
157 | #define USBCAN_ERROR_STATE_BUSERROR BIT(2) | |
158 | ||
080f40a6 OS |
159 | /* bittiming parameters */ |
160 | #define KVASER_USB_TSEG1_MIN 1 | |
161 | #define KVASER_USB_TSEG1_MAX 16 | |
162 | #define KVASER_USB_TSEG2_MIN 1 | |
163 | #define KVASER_USB_TSEG2_MAX 8 | |
164 | #define KVASER_USB_SJW_MAX 4 | |
165 | #define KVASER_USB_BRP_MIN 1 | |
166 | #define KVASER_USB_BRP_MAX 64 | |
167 | #define KVASER_USB_BRP_INC 1 | |
168 | ||
169 | /* ctrl modes */ | |
170 | #define KVASER_CTRL_MODE_NORMAL 1 | |
171 | #define KVASER_CTRL_MODE_SILENT 2 | |
172 | #define KVASER_CTRL_MODE_SELFRECEPTION 3 | |
173 | #define KVASER_CTRL_MODE_OFF 4 | |
174 | ||
f5d4abea | 175 | /* Extended CAN identifier flag */ |
a90f13b2 JP |
176 | #define KVASER_EXTENDED_FRAME BIT(31) |
177 | ||
f5d4abea AD |
178 | /* Kvaser USB CAN dongles are divided into two major families: |
179 | * - Leaf: Based on Renesas M32C, running firmware labeled as 'filo' | |
180 | * - UsbcanII: Based on Renesas M16C, running firmware labeled as 'helios' | |
181 | */ | |
182 | enum kvaser_usb_family { | |
183 | KVASER_LEAF, | |
184 | KVASER_USBCAN, | |
185 | }; | |
186 | ||
080f40a6 OS |
187 | struct kvaser_msg_simple { |
188 | u8 tid; | |
189 | u8 channel; | |
190 | } __packed; | |
191 | ||
192 | struct kvaser_msg_cardinfo { | |
193 | u8 tid; | |
194 | u8 nchannels; | |
f5d4abea AD |
195 | union { |
196 | struct { | |
197 | __le32 serial_number; | |
198 | __le32 padding; | |
199 | } __packed leaf0; | |
200 | struct { | |
201 | __le32 serial_number_low; | |
202 | __le32 serial_number_high; | |
203 | } __packed usbcan0; | |
204 | } __packed; | |
080f40a6 OS |
205 | __le32 clock_resolution; |
206 | __le32 mfgdate; | |
207 | u8 ean[8]; | |
208 | u8 hw_revision; | |
f5d4abea AD |
209 | union { |
210 | struct { | |
211 | u8 usb_hs_mode; | |
212 | } __packed leaf1; | |
213 | struct { | |
214 | u8 padding; | |
215 | } __packed usbcan1; | |
216 | } __packed; | |
217 | __le16 padding; | |
080f40a6 OS |
218 | } __packed; |
219 | ||
220 | struct kvaser_msg_cardinfo2 { | |
221 | u8 tid; | |
f5d4abea | 222 | u8 reserved; |
080f40a6 OS |
223 | u8 pcb_id[24]; |
224 | __le32 oem_unlock_code; | |
225 | } __packed; | |
226 | ||
f5d4abea | 227 | struct leaf_msg_softinfo { |
080f40a6 | 228 | u8 tid; |
f5d4abea | 229 | u8 padding0; |
080f40a6 OS |
230 | __le32 sw_options; |
231 | __le32 fw_version; | |
232 | __le16 max_outstanding_tx; | |
f5d4abea AD |
233 | __le16 padding1[9]; |
234 | } __packed; | |
235 | ||
236 | struct usbcan_msg_softinfo { | |
237 | u8 tid; | |
238 | u8 fw_name[5]; | |
239 | __le16 max_outstanding_tx; | |
240 | u8 padding[6]; | |
241 | __le32 fw_version; | |
242 | __le16 checksum; | |
243 | __le16 sw_options; | |
080f40a6 OS |
244 | } __packed; |
245 | ||
246 | struct kvaser_msg_busparams { | |
247 | u8 tid; | |
248 | u8 channel; | |
249 | __le32 bitrate; | |
250 | u8 tseg1; | |
251 | u8 tseg2; | |
252 | u8 sjw; | |
253 | u8 no_samp; | |
254 | } __packed; | |
255 | ||
256 | struct kvaser_msg_tx_can { | |
257 | u8 channel; | |
258 | u8 tid; | |
259 | u8 msg[14]; | |
f5d4abea AD |
260 | union { |
261 | struct { | |
262 | u8 padding; | |
263 | u8 flags; | |
264 | } __packed leaf; | |
265 | struct { | |
266 | u8 flags; | |
267 | u8 padding; | |
268 | } __packed usbcan; | |
269 | } __packed; | |
270 | } __packed; | |
271 | ||
272 | struct kvaser_msg_rx_can_header { | |
273 | u8 channel; | |
274 | u8 flag; | |
080f40a6 OS |
275 | } __packed; |
276 | ||
f5d4abea | 277 | struct leaf_msg_rx_can { |
080f40a6 OS |
278 | u8 channel; |
279 | u8 flag; | |
f5d4abea | 280 | |
080f40a6 OS |
281 | __le16 time[3]; |
282 | u8 msg[14]; | |
283 | } __packed; | |
284 | ||
f5d4abea AD |
285 | struct usbcan_msg_rx_can { |
286 | u8 channel; | |
287 | u8 flag; | |
288 | ||
289 | u8 msg[14]; | |
290 | __le16 time; | |
291 | } __packed; | |
292 | ||
293 | struct leaf_msg_chip_state_event { | |
080f40a6 OS |
294 | u8 tid; |
295 | u8 channel; | |
f5d4abea | 296 | |
080f40a6 OS |
297 | __le16 time[3]; |
298 | u8 tx_errors_count; | |
299 | u8 rx_errors_count; | |
f5d4abea AD |
300 | |
301 | u8 status; | |
302 | u8 padding[3]; | |
303 | } __packed; | |
304 | ||
305 | struct usbcan_msg_chip_state_event { | |
306 | u8 tid; | |
307 | u8 channel; | |
308 | ||
309 | u8 tx_errors_count; | |
310 | u8 rx_errors_count; | |
311 | __le16 time; | |
312 | ||
080f40a6 OS |
313 | u8 status; |
314 | u8 padding[3]; | |
315 | } __packed; | |
316 | ||
f5d4abea | 317 | struct kvaser_msg_tx_acknowledge_header { |
080f40a6 OS |
318 | u8 channel; |
319 | u8 tid; | |
f5d4abea AD |
320 | } __packed; |
321 | ||
322 | struct leaf_msg_tx_acknowledge { | |
323 | u8 channel; | |
324 | u8 tid; | |
325 | ||
080f40a6 OS |
326 | __le16 time[3]; |
327 | u8 flags; | |
328 | u8 time_offset; | |
329 | } __packed; | |
330 | ||
f5d4abea AD |
331 | struct usbcan_msg_tx_acknowledge { |
332 | u8 channel; | |
333 | u8 tid; | |
334 | ||
335 | __le16 time; | |
336 | __le16 padding; | |
337 | } __packed; | |
338 | ||
339 | struct leaf_msg_error_event { | |
080f40a6 OS |
340 | u8 tid; |
341 | u8 flags; | |
342 | __le16 time[3]; | |
343 | u8 channel; | |
344 | u8 padding; | |
345 | u8 tx_errors_count; | |
346 | u8 rx_errors_count; | |
347 | u8 status; | |
348 | u8 error_factor; | |
349 | } __packed; | |
350 | ||
f5d4abea AD |
351 | struct usbcan_msg_error_event { |
352 | u8 tid; | |
353 | u8 padding; | |
354 | u8 tx_errors_count_ch0; | |
355 | u8 rx_errors_count_ch0; | |
356 | u8 tx_errors_count_ch1; | |
357 | u8 rx_errors_count_ch1; | |
358 | u8 status_ch0; | |
359 | u8 status_ch1; | |
360 | __le16 time; | |
361 | } __packed; | |
362 | ||
080f40a6 OS |
363 | struct kvaser_msg_ctrl_mode { |
364 | u8 tid; | |
365 | u8 channel; | |
366 | u8 ctrl_mode; | |
367 | u8 padding[3]; | |
368 | } __packed; | |
369 | ||
370 | struct kvaser_msg_flush_queue { | |
371 | u8 tid; | |
372 | u8 channel; | |
373 | u8 flags; | |
374 | u8 padding[3]; | |
375 | } __packed; | |
376 | ||
f5d4abea | 377 | struct leaf_msg_log_message { |
080f40a6 OS |
378 | u8 channel; |
379 | u8 flags; | |
380 | __le16 time[3]; | |
381 | u8 dlc; | |
382 | u8 time_offset; | |
383 | __le32 id; | |
384 | u8 data[8]; | |
385 | } __packed; | |
386 | ||
387 | struct kvaser_msg { | |
388 | u8 len; | |
389 | u8 id; | |
390 | union { | |
391 | struct kvaser_msg_simple simple; | |
392 | struct kvaser_msg_cardinfo cardinfo; | |
393 | struct kvaser_msg_cardinfo2 cardinfo2; | |
080f40a6 | 394 | struct kvaser_msg_busparams busparams; |
f5d4abea AD |
395 | |
396 | struct kvaser_msg_rx_can_header rx_can_header; | |
397 | struct kvaser_msg_tx_acknowledge_header tx_acknowledge_header; | |
398 | ||
399 | union { | |
400 | struct leaf_msg_softinfo softinfo; | |
401 | struct leaf_msg_rx_can rx_can; | |
402 | struct leaf_msg_chip_state_event chip_state_event; | |
403 | struct leaf_msg_tx_acknowledge tx_acknowledge; | |
404 | struct leaf_msg_error_event error_event; | |
405 | struct leaf_msg_log_message log_message; | |
406 | } __packed leaf; | |
407 | ||
408 | union { | |
409 | struct usbcan_msg_softinfo softinfo; | |
410 | struct usbcan_msg_rx_can rx_can; | |
411 | struct usbcan_msg_chip_state_event chip_state_event; | |
412 | struct usbcan_msg_tx_acknowledge tx_acknowledge; | |
413 | struct usbcan_msg_error_event error_event; | |
414 | } __packed usbcan; | |
415 | ||
080f40a6 | 416 | struct kvaser_msg_tx_can tx_can; |
080f40a6 OS |
417 | struct kvaser_msg_ctrl_mode ctrl_mode; |
418 | struct kvaser_msg_flush_queue flush_queue; | |
080f40a6 OS |
419 | } u; |
420 | } __packed; | |
421 | ||
f5d4abea AD |
422 | /* Summary of a kvaser error event, for a unified Leaf/Usbcan error |
423 | * handling. Some discrepancies between the two families exist: | |
424 | * | |
425 | * - USBCAN firmware does not report M16C "error factors" | |
426 | * - USBCAN controllers has difficulties reporting if the raised error | |
427 | * event is for ch0 or ch1. They leave such arbitration to the OS | |
428 | * driver by letting it compare error counters with previous values | |
429 | * and decide the error event's channel. Thus for USBCAN, the channel | |
430 | * field is only advisory. | |
431 | */ | |
3b07a444 | 432 | struct kvaser_usb_error_summary { |
f5d4abea AD |
433 | u8 channel, status, txerr, rxerr; |
434 | union { | |
435 | struct { | |
436 | u8 error_factor; | |
437 | } leaf; | |
438 | struct { | |
439 | u8 other_ch_status; | |
440 | u8 error_state; | |
441 | } usbcan; | |
442 | }; | |
3b07a444 AD |
443 | }; |
444 | ||
080f40a6 OS |
445 | struct kvaser_usb_tx_urb_context { |
446 | struct kvaser_usb_net_priv *priv; | |
447 | u32 echo_index; | |
448 | int dlc; | |
449 | }; | |
450 | ||
451 | struct kvaser_usb { | |
452 | struct usb_device *udev; | |
453 | struct kvaser_usb_net_priv *nets[MAX_NET_DEVICES]; | |
454 | ||
455 | struct usb_endpoint_descriptor *bulk_in, *bulk_out; | |
456 | struct usb_anchor rx_submitted; | |
457 | ||
458 | u32 fw_version; | |
459 | unsigned int nchannels; | |
f5d4abea | 460 | enum kvaser_usb_family family; |
080f40a6 OS |
461 | |
462 | bool rxinitdone; | |
463 | void *rxbuf[MAX_RX_URBS]; | |
464 | dma_addr_t rxbuf_dma[MAX_RX_URBS]; | |
465 | }; | |
466 | ||
467 | struct kvaser_usb_net_priv { | |
468 | struct can_priv can; | |
469 | ||
470 | atomic_t active_tx_urbs; | |
471 | struct usb_anchor tx_submitted; | |
472 | struct kvaser_usb_tx_urb_context tx_contexts[MAX_TX_URBS]; | |
473 | ||
474 | struct completion start_comp, stop_comp; | |
475 | ||
476 | struct kvaser_usb *dev; | |
477 | struct net_device *netdev; | |
478 | int channel; | |
479 | ||
480 | struct can_berr_counter bec; | |
481 | }; | |
482 | ||
483 | static const struct usb_device_id kvaser_usb_table[] = { | |
f5d4abea | 484 | /* Leaf family IDs */ |
080f40a6 OS |
485 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) }, |
486 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) }, | |
487 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID), | |
488 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
489 | KVASER_HAS_SILENT_MODE }, | |
490 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID), | |
491 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
492 | KVASER_HAS_SILENT_MODE }, | |
493 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID), | |
494 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
495 | KVASER_HAS_SILENT_MODE }, | |
496 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID), | |
497 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
498 | KVASER_HAS_SILENT_MODE }, | |
499 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID), | |
500 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
501 | KVASER_HAS_SILENT_MODE }, | |
502 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID), | |
503 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
504 | KVASER_HAS_SILENT_MODE }, | |
505 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID), | |
506 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
507 | KVASER_HAS_SILENT_MODE }, | |
508 | { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID), | |
509 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
510 | KVASER_HAS_SILENT_MODE }, | |
511 | { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID), | |
512 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
513 | KVASER_HAS_SILENT_MODE }, | |
514 | { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID), | |
515 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
516 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) }, | |
517 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID), | |
518 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
519 | KVASER_HAS_SILENT_MODE }, | |
520 | { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID), | |
521 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
522 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID), | |
523 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
524 | { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID), | |
525 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
526 | { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID), | |
527 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
528 | { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID), | |
529 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
530 | { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID), | |
531 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
b4f20130 OS |
532 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID) }, |
533 | { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID) }, | |
f5d4abea AD |
534 | |
535 | /* USBCANII family IDs */ | |
536 | { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID), | |
537 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
538 | { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID), | |
539 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
540 | { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID), | |
541 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
542 | { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID), | |
543 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
544 | ||
080f40a6 OS |
545 | { } |
546 | }; | |
547 | MODULE_DEVICE_TABLE(usb, kvaser_usb_table); | |
548 | ||
549 | static inline int kvaser_usb_send_msg(const struct kvaser_usb *dev, | |
550 | struct kvaser_msg *msg) | |
551 | { | |
552 | int actual_len; | |
553 | ||
554 | return usb_bulk_msg(dev->udev, | |
555 | usb_sndbulkpipe(dev->udev, | |
556 | dev->bulk_out->bEndpointAddress), | |
557 | msg, msg->len, &actual_len, | |
558 | USB_SEND_TIMEOUT); | |
559 | } | |
560 | ||
561 | static int kvaser_usb_wait_msg(const struct kvaser_usb *dev, u8 id, | |
562 | struct kvaser_msg *msg) | |
563 | { | |
564 | struct kvaser_msg *tmp; | |
565 | void *buf; | |
566 | int actual_len; | |
567 | int err; | |
e59e36e7 OS |
568 | int pos; |
569 | unsigned long to = jiffies + msecs_to_jiffies(USB_RECV_TIMEOUT); | |
080f40a6 OS |
570 | |
571 | buf = kzalloc(RX_BUFFER_SIZE, GFP_KERNEL); | |
572 | if (!buf) | |
573 | return -ENOMEM; | |
574 | ||
e59e36e7 OS |
575 | do { |
576 | err = usb_bulk_msg(dev->udev, | |
577 | usb_rcvbulkpipe(dev->udev, | |
578 | dev->bulk_in->bEndpointAddress), | |
579 | buf, RX_BUFFER_SIZE, &actual_len, | |
580 | USB_RECV_TIMEOUT); | |
581 | if (err < 0) | |
582 | goto end; | |
080f40a6 | 583 | |
e59e36e7 OS |
584 | pos = 0; |
585 | while (pos <= actual_len - MSG_HEADER_LEN) { | |
586 | tmp = buf + pos; | |
080f40a6 | 587 | |
2fec5104 AD |
588 | /* Handle messages crossing the USB endpoint max packet |
589 | * size boundary. Check kvaser_usb_read_bulk_callback() | |
590 | * for further details. | |
591 | */ | |
592 | if (tmp->len == 0) { | |
593 | pos = round_up(pos, | |
594 | dev->bulk_in->wMaxPacketSize); | |
595 | continue; | |
596 | } | |
080f40a6 | 597 | |
e59e36e7 OS |
598 | if (pos + tmp->len > actual_len) { |
599 | dev_err(dev->udev->dev.parent, | |
600 | "Format error\n"); | |
601 | break; | |
602 | } | |
080f40a6 | 603 | |
e59e36e7 OS |
604 | if (tmp->id == id) { |
605 | memcpy(msg, tmp, tmp->len); | |
606 | goto end; | |
607 | } | |
080f40a6 | 608 | |
e59e36e7 OS |
609 | pos += tmp->len; |
610 | } | |
611 | } while (time_before(jiffies, to)); | |
080f40a6 OS |
612 | |
613 | err = -EINVAL; | |
614 | ||
615 | end: | |
616 | kfree(buf); | |
617 | ||
618 | return err; | |
619 | } | |
620 | ||
621 | static int kvaser_usb_send_simple_msg(const struct kvaser_usb *dev, | |
622 | u8 msg_id, int channel) | |
623 | { | |
624 | struct kvaser_msg *msg; | |
625 | int rc; | |
626 | ||
627 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); | |
628 | if (!msg) | |
629 | return -ENOMEM; | |
630 | ||
631 | msg->id = msg_id; | |
632 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple); | |
633 | msg->u.simple.channel = channel; | |
634 | msg->u.simple.tid = 0xff; | |
635 | ||
636 | rc = kvaser_usb_send_msg(dev, msg); | |
637 | ||
638 | kfree(msg); | |
639 | return rc; | |
640 | } | |
641 | ||
642 | static int kvaser_usb_get_software_info(struct kvaser_usb *dev) | |
643 | { | |
644 | struct kvaser_msg msg; | |
645 | int err; | |
646 | ||
647 | err = kvaser_usb_send_simple_msg(dev, CMD_GET_SOFTWARE_INFO, 0); | |
648 | if (err) | |
649 | return err; | |
650 | ||
651 | err = kvaser_usb_wait_msg(dev, CMD_GET_SOFTWARE_INFO_REPLY, &msg); | |
652 | if (err) | |
653 | return err; | |
654 | ||
f5d4abea AD |
655 | switch (dev->family) { |
656 | case KVASER_LEAF: | |
657 | dev->fw_version = le32_to_cpu(msg.u.leaf.softinfo.fw_version); | |
658 | break; | |
659 | case KVASER_USBCAN: | |
660 | dev->fw_version = le32_to_cpu(msg.u.usbcan.softinfo.fw_version); | |
661 | break; | |
662 | } | |
080f40a6 OS |
663 | |
664 | return 0; | |
665 | } | |
666 | ||
667 | static int kvaser_usb_get_card_info(struct kvaser_usb *dev) | |
668 | { | |
669 | struct kvaser_msg msg; | |
670 | int err; | |
671 | ||
672 | err = kvaser_usb_send_simple_msg(dev, CMD_GET_CARD_INFO, 0); | |
673 | if (err) | |
674 | return err; | |
675 | ||
676 | err = kvaser_usb_wait_msg(dev, CMD_GET_CARD_INFO_REPLY, &msg); | |
677 | if (err) | |
678 | return err; | |
679 | ||
680 | dev->nchannels = msg.u.cardinfo.nchannels; | |
f5d4abea AD |
681 | if ((dev->nchannels > MAX_NET_DEVICES) || |
682 | (dev->family == KVASER_USBCAN && | |
683 | dev->nchannels > MAX_USBCAN_NET_DEVICES)) | |
862474f8 | 684 | return -EINVAL; |
080f40a6 OS |
685 | |
686 | return 0; | |
687 | } | |
688 | ||
689 | static void kvaser_usb_tx_acknowledge(const struct kvaser_usb *dev, | |
690 | const struct kvaser_msg *msg) | |
691 | { | |
692 | struct net_device_stats *stats; | |
693 | struct kvaser_usb_tx_urb_context *context; | |
694 | struct kvaser_usb_net_priv *priv; | |
695 | struct sk_buff *skb; | |
696 | struct can_frame *cf; | |
f5d4abea AD |
697 | u8 channel, tid; |
698 | ||
699 | channel = msg->u.tx_acknowledge_header.channel; | |
700 | tid = msg->u.tx_acknowledge_header.tid; | |
080f40a6 OS |
701 | |
702 | if (channel >= dev->nchannels) { | |
703 | dev_err(dev->udev->dev.parent, | |
704 | "Invalid channel number (%d)\n", channel); | |
705 | return; | |
706 | } | |
707 | ||
708 | priv = dev->nets[channel]; | |
709 | ||
710 | if (!netif_device_present(priv->netdev)) | |
711 | return; | |
712 | ||
713 | stats = &priv->netdev->stats; | |
714 | ||
715 | context = &priv->tx_contexts[tid % MAX_TX_URBS]; | |
716 | ||
717 | /* Sometimes the state change doesn't come after a bus-off event */ | |
718 | if (priv->can.restart_ms && | |
719 | (priv->can.state >= CAN_STATE_BUS_OFF)) { | |
720 | skb = alloc_can_err_skb(priv->netdev, &cf); | |
721 | if (skb) { | |
722 | cf->can_id |= CAN_ERR_RESTARTED; | |
080f40a6 OS |
723 | |
724 | stats->rx_packets++; | |
725 | stats->rx_bytes += cf->can_dlc; | |
a58518cc | 726 | netif_rx(skb); |
080f40a6 OS |
727 | } else { |
728 | netdev_err(priv->netdev, | |
729 | "No memory left for err_skb\n"); | |
730 | } | |
731 | ||
732 | priv->can.can_stats.restarts++; | |
733 | netif_carrier_on(priv->netdev); | |
734 | ||
735 | priv->can.state = CAN_STATE_ERROR_ACTIVE; | |
736 | } | |
737 | ||
738 | stats->tx_packets++; | |
739 | stats->tx_bytes += context->dlc; | |
740 | can_get_echo_skb(priv->netdev, context->echo_index); | |
741 | ||
742 | context->echo_index = MAX_TX_URBS; | |
743 | atomic_dec(&priv->active_tx_urbs); | |
744 | ||
745 | netif_wake_queue(priv->netdev); | |
746 | } | |
747 | ||
748 | static void kvaser_usb_simple_msg_callback(struct urb *urb) | |
749 | { | |
750 | struct net_device *netdev = urb->context; | |
751 | ||
752 | kfree(urb->transfer_buffer); | |
753 | ||
754 | if (urb->status) | |
755 | netdev_warn(netdev, "urb status received: %d\n", | |
756 | urb->status); | |
757 | } | |
758 | ||
759 | static int kvaser_usb_simple_msg_async(struct kvaser_usb_net_priv *priv, | |
760 | u8 msg_id) | |
761 | { | |
762 | struct kvaser_usb *dev = priv->dev; | |
763 | struct net_device *netdev = priv->netdev; | |
764 | struct kvaser_msg *msg; | |
765 | struct urb *urb; | |
766 | void *buf; | |
767 | int err; | |
768 | ||
769 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
770 | if (!urb) { | |
771 | netdev_err(netdev, "No memory left for URBs\n"); | |
772 | return -ENOMEM; | |
773 | } | |
774 | ||
775 | buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC); | |
776 | if (!buf) { | |
080f40a6 OS |
777 | usb_free_urb(urb); |
778 | return -ENOMEM; | |
779 | } | |
780 | ||
781 | msg = (struct kvaser_msg *)buf; | |
782 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple); | |
783 | msg->id = msg_id; | |
784 | msg->u.simple.channel = priv->channel; | |
785 | ||
786 | usb_fill_bulk_urb(urb, dev->udev, | |
787 | usb_sndbulkpipe(dev->udev, | |
788 | dev->bulk_out->bEndpointAddress), | |
789 | buf, msg->len, | |
3803fa69 | 790 | kvaser_usb_simple_msg_callback, netdev); |
080f40a6 OS |
791 | usb_anchor_urb(urb, &priv->tx_submitted); |
792 | ||
793 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
794 | if (err) { | |
795 | netdev_err(netdev, "Error transmitting URB\n"); | |
796 | usb_unanchor_urb(urb); | |
797 | usb_free_urb(urb); | |
080f40a6 OS |
798 | return err; |
799 | } | |
800 | ||
801 | usb_free_urb(urb); | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
806 | static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv) | |
807 | { | |
808 | int i; | |
809 | ||
810 | usb_kill_anchored_urbs(&priv->tx_submitted); | |
811 | atomic_set(&priv->active_tx_urbs, 0); | |
812 | ||
813 | for (i = 0; i < MAX_TX_URBS; i++) | |
814 | priv->tx_contexts[i].echo_index = MAX_TX_URBS; | |
815 | } | |
816 | ||
3b07a444 | 817 | static void kvaser_usb_rx_error_update_can_state(struct kvaser_usb_net_priv *priv, |
96d7f106 AD |
818 | const struct kvaser_usb_error_summary *es, |
819 | struct can_frame *cf) | |
3b07a444 | 820 | { |
f5d4abea AD |
821 | struct kvaser_usb *dev = priv->dev; |
822 | struct net_device_stats *stats = &priv->netdev->stats; | |
96d7f106 | 823 | enum can_state cur_state, new_state, tx_state, rx_state; |
3b07a444 AD |
824 | |
825 | netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status); | |
826 | ||
96d7f106 AD |
827 | new_state = cur_state = priv->can.state; |
828 | ||
829 | if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) | |
3b07a444 | 830 | new_state = CAN_STATE_BUS_OFF; |
96d7f106 | 831 | else if (es->status & M16C_STATE_BUS_PASSIVE) |
3b07a444 | 832 | new_state = CAN_STATE_ERROR_PASSIVE; |
96d7f106 | 833 | else if (es->status & M16C_STATE_BUS_ERROR) { |
a9ca6e13 AD |
834 | /* Guard against spurious error events after a busoff */ |
835 | if (cur_state < CAN_STATE_BUS_OFF) { | |
836 | if ((es->txerr >= 128) || (es->rxerr >= 128)) | |
837 | new_state = CAN_STATE_ERROR_PASSIVE; | |
838 | else if ((es->txerr >= 96) || (es->rxerr >= 96)) | |
839 | new_state = CAN_STATE_ERROR_WARNING; | |
840 | else if (cur_state > CAN_STATE_ERROR_ACTIVE) | |
841 | new_state = CAN_STATE_ERROR_ACTIVE; | |
842 | } | |
3b07a444 AD |
843 | } |
844 | ||
845 | if (!es->status) | |
846 | new_state = CAN_STATE_ERROR_ACTIVE; | |
847 | ||
96d7f106 AD |
848 | if (new_state != cur_state) { |
849 | tx_state = (es->txerr >= es->rxerr) ? new_state : 0; | |
850 | rx_state = (es->txerr <= es->rxerr) ? new_state : 0; | |
851 | ||
852 | can_change_state(priv->netdev, cf, tx_state, rx_state); | |
853 | } | |
854 | ||
3b07a444 | 855 | if (priv->can.restart_ms && |
96d7f106 | 856 | (cur_state >= CAN_STATE_BUS_OFF) && |
3b07a444 AD |
857 | (new_state < CAN_STATE_BUS_OFF)) { |
858 | priv->can.can_stats.restarts++; | |
859 | } | |
860 | ||
f5d4abea AD |
861 | switch (dev->family) { |
862 | case KVASER_LEAF: | |
863 | if (es->leaf.error_factor) { | |
864 | priv->can.can_stats.bus_error++; | |
865 | stats->rx_errors++; | |
866 | } | |
867 | break; | |
868 | case KVASER_USBCAN: | |
869 | if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR) | |
870 | stats->tx_errors++; | |
871 | if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR) | |
872 | stats->rx_errors++; | |
873 | if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) { | |
874 | priv->can.can_stats.bus_error++; | |
875 | } | |
876 | break; | |
3b07a444 AD |
877 | } |
878 | ||
879 | priv->bec.txerr = es->txerr; | |
880 | priv->bec.rxerr = es->rxerr; | |
3b07a444 AD |
881 | } |
882 | ||
080f40a6 | 883 | static void kvaser_usb_rx_error(const struct kvaser_usb *dev, |
f5d4abea | 884 | const struct kvaser_usb_error_summary *es) |
080f40a6 | 885 | { |
96d7f106 | 886 | struct can_frame *cf, tmp_cf = { .can_id = CAN_ERR_FLAG, .can_dlc = CAN_ERR_DLC }; |
080f40a6 OS |
887 | struct sk_buff *skb; |
888 | struct net_device_stats *stats; | |
889 | struct kvaser_usb_net_priv *priv; | |
96d7f106 | 890 | enum can_state old_state, new_state; |
080f40a6 | 891 | |
f5d4abea | 892 | if (es->channel >= dev->nchannels) { |
080f40a6 | 893 | dev_err(dev->udev->dev.parent, |
f5d4abea | 894 | "Invalid channel number (%d)\n", es->channel); |
080f40a6 OS |
895 | return; |
896 | } | |
897 | ||
f5d4abea | 898 | priv = dev->nets[es->channel]; |
080f40a6 OS |
899 | stats = &priv->netdev->stats; |
900 | ||
3b07a444 | 901 | /* Update all of the can interface's state and error counters before |
96d7f106 AD |
902 | * trying any memory allocation that can actually fail with -ENOMEM. |
903 | * | |
904 | * We send a temporary stack-allocated error can frame to | |
905 | * can_change_state() for the very same reason. | |
906 | * | |
907 | * TODO: Split can_change_state() responsibility between updating the | |
908 | * can interface's state and counters, and the setting up of can error | |
909 | * frame ID and data to userspace. Remove stack allocation afterwards. | |
3b07a444 AD |
910 | */ |
911 | old_state = priv->can.state; | |
f5d4abea | 912 | kvaser_usb_rx_error_update_can_state(priv, es, &tmp_cf); |
96d7f106 | 913 | new_state = priv->can.state; |
3b07a444 | 914 | |
080f40a6 OS |
915 | skb = alloc_can_err_skb(priv->netdev, &cf); |
916 | if (!skb) { | |
917 | stats->rx_dropped++; | |
918 | return; | |
919 | } | |
96d7f106 AD |
920 | memcpy(cf, &tmp_cf, sizeof(*cf)); |
921 | ||
922 | if (new_state != old_state) { | |
f5d4abea | 923 | if (es->status & |
96d7f106 AD |
924 | (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) { |
925 | if (!priv->can.restart_ms) | |
926 | kvaser_usb_simple_msg_async(priv, CMD_STOP_CHIP); | |
927 | netif_carrier_off(priv->netdev); | |
080f40a6 | 928 | } |
080f40a6 | 929 | |
96d7f106 AD |
930 | if (priv->can.restart_ms && |
931 | (old_state >= CAN_STATE_BUS_OFF) && | |
932 | (new_state < CAN_STATE_BUS_OFF)) { | |
933 | cf->can_id |= CAN_ERR_RESTARTED; | |
934 | netif_carrier_on(priv->netdev); | |
935 | } | |
080f40a6 OS |
936 | } |
937 | ||
f5d4abea AD |
938 | switch (dev->family) { |
939 | case KVASER_LEAF: | |
940 | if (es->leaf.error_factor) { | |
941 | cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT; | |
942 | ||
943 | if (es->leaf.error_factor & M16C_EF_ACKE) | |
944 | cf->data[3] |= (CAN_ERR_PROT_LOC_ACK); | |
945 | if (es->leaf.error_factor & M16C_EF_CRCE) | |
946 | cf->data[3] |= (CAN_ERR_PROT_LOC_CRC_SEQ | | |
947 | CAN_ERR_PROT_LOC_CRC_DEL); | |
948 | if (es->leaf.error_factor & M16C_EF_FORME) | |
949 | cf->data[2] |= CAN_ERR_PROT_FORM; | |
950 | if (es->leaf.error_factor & M16C_EF_STFE) | |
951 | cf->data[2] |= CAN_ERR_PROT_STUFF; | |
952 | if (es->leaf.error_factor & M16C_EF_BITE0) | |
953 | cf->data[2] |= CAN_ERR_PROT_BIT0; | |
954 | if (es->leaf.error_factor & M16C_EF_BITE1) | |
955 | cf->data[2] |= CAN_ERR_PROT_BIT1; | |
956 | if (es->leaf.error_factor & M16C_EF_TRE) | |
957 | cf->data[2] |= CAN_ERR_PROT_TX; | |
958 | } | |
959 | break; | |
960 | case KVASER_USBCAN: | |
961 | if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) { | |
962 | cf->can_id |= CAN_ERR_BUSERROR; | |
963 | } | |
964 | break; | |
080f40a6 OS |
965 | } |
966 | ||
f5d4abea AD |
967 | cf->data[6] = es->txerr; |
968 | cf->data[7] = es->rxerr; | |
080f40a6 | 969 | |
080f40a6 OS |
970 | stats->rx_packets++; |
971 | stats->rx_bytes += cf->can_dlc; | |
a58518cc | 972 | netif_rx(skb); |
080f40a6 OS |
973 | } |
974 | ||
f5d4abea AD |
975 | /* For USBCAN, report error to userspace iff the channels's errors counter |
976 | * has changed, or we're the only channel seeing a bus error state. | |
977 | */ | |
978 | static void kvaser_usbcan_conditionally_rx_error(const struct kvaser_usb *dev, | |
979 | struct kvaser_usb_error_summary *es) | |
980 | { | |
981 | struct kvaser_usb_net_priv *priv; | |
982 | int channel; | |
983 | bool report_error; | |
984 | ||
985 | channel = es->channel; | |
986 | if (channel >= dev->nchannels) { | |
987 | dev_err(dev->udev->dev.parent, | |
988 | "Invalid channel number (%d)\n", channel); | |
989 | return; | |
990 | } | |
991 | ||
992 | priv = dev->nets[channel]; | |
993 | report_error = false; | |
994 | ||
995 | if (es->txerr != priv->bec.txerr) { | |
996 | es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR; | |
997 | report_error = true; | |
998 | } | |
999 | if (es->rxerr != priv->bec.rxerr) { | |
1000 | es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR; | |
1001 | report_error = true; | |
1002 | } | |
1003 | if ((es->status & M16C_STATE_BUS_ERROR) && | |
1004 | !(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) { | |
1005 | es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR; | |
1006 | report_error = true; | |
1007 | } | |
1008 | ||
1009 | if (report_error) | |
1010 | kvaser_usb_rx_error(dev, es); | |
1011 | } | |
1012 | ||
1013 | static void kvaser_usbcan_rx_error(const struct kvaser_usb *dev, | |
1014 | const struct kvaser_msg *msg) | |
1015 | { | |
1016 | struct kvaser_usb_error_summary es = { }; | |
1017 | ||
1018 | switch (msg->id) { | |
1019 | /* Sometimes errors are sent as unsolicited chip state events */ | |
1020 | case CMD_CHIP_STATE_EVENT: | |
1021 | es.channel = msg->u.usbcan.chip_state_event.channel; | |
1022 | es.status = msg->u.usbcan.chip_state_event.status; | |
1023 | es.txerr = msg->u.usbcan.chip_state_event.tx_errors_count; | |
1024 | es.rxerr = msg->u.usbcan.chip_state_event.rx_errors_count; | |
1025 | kvaser_usbcan_conditionally_rx_error(dev, &es); | |
1026 | break; | |
1027 | ||
1028 | case CMD_CAN_ERROR_EVENT: | |
1029 | es.channel = 0; | |
1030 | es.status = msg->u.usbcan.error_event.status_ch0; | |
1031 | es.txerr = msg->u.usbcan.error_event.tx_errors_count_ch0; | |
1032 | es.rxerr = msg->u.usbcan.error_event.rx_errors_count_ch0; | |
1033 | es.usbcan.other_ch_status = | |
1034 | msg->u.usbcan.error_event.status_ch1; | |
1035 | kvaser_usbcan_conditionally_rx_error(dev, &es); | |
1036 | ||
1037 | /* The USBCAN firmware supports up to 2 channels. | |
1038 | * Now that ch0 was checked, check if ch1 has any errors. | |
1039 | */ | |
1040 | if (dev->nchannels == MAX_USBCAN_NET_DEVICES) { | |
1041 | es.channel = 1; | |
1042 | es.status = msg->u.usbcan.error_event.status_ch1; | |
1043 | es.txerr = msg->u.usbcan.error_event.tx_errors_count_ch1; | |
1044 | es.rxerr = msg->u.usbcan.error_event.rx_errors_count_ch1; | |
1045 | es.usbcan.other_ch_status = | |
1046 | msg->u.usbcan.error_event.status_ch0; | |
1047 | kvaser_usbcan_conditionally_rx_error(dev, &es); | |
1048 | } | |
1049 | break; | |
1050 | ||
1051 | default: | |
1052 | dev_err(dev->udev->dev.parent, "Invalid msg id (%d)\n", | |
1053 | msg->id); | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | static void kvaser_leaf_rx_error(const struct kvaser_usb *dev, | |
1058 | const struct kvaser_msg *msg) | |
1059 | { | |
1060 | struct kvaser_usb_error_summary es = { }; | |
1061 | ||
1062 | switch (msg->id) { | |
1063 | case CMD_CAN_ERROR_EVENT: | |
1064 | es.channel = msg->u.leaf.error_event.channel; | |
1065 | es.status = msg->u.leaf.error_event.status; | |
1066 | es.txerr = msg->u.leaf.error_event.tx_errors_count; | |
1067 | es.rxerr = msg->u.leaf.error_event.rx_errors_count; | |
1068 | es.leaf.error_factor = msg->u.leaf.error_event.error_factor; | |
1069 | break; | |
1070 | case CMD_LEAF_LOG_MESSAGE: | |
1071 | es.channel = msg->u.leaf.log_message.channel; | |
1072 | es.status = msg->u.leaf.log_message.data[0]; | |
1073 | es.txerr = msg->u.leaf.log_message.data[2]; | |
1074 | es.rxerr = msg->u.leaf.log_message.data[3]; | |
1075 | es.leaf.error_factor = msg->u.leaf.log_message.data[1]; | |
1076 | break; | |
1077 | case CMD_CHIP_STATE_EVENT: | |
1078 | es.channel = msg->u.leaf.chip_state_event.channel; | |
1079 | es.status = msg->u.leaf.chip_state_event.status; | |
1080 | es.txerr = msg->u.leaf.chip_state_event.tx_errors_count; | |
1081 | es.rxerr = msg->u.leaf.chip_state_event.rx_errors_count; | |
1082 | es.leaf.error_factor = 0; | |
1083 | break; | |
1084 | default: | |
1085 | dev_err(dev->udev->dev.parent, "Invalid msg id (%d)\n", | |
1086 | msg->id); | |
1087 | return; | |
1088 | } | |
1089 | ||
1090 | kvaser_usb_rx_error(dev, &es); | |
1091 | } | |
1092 | ||
080f40a6 OS |
1093 | static void kvaser_usb_rx_can_err(const struct kvaser_usb_net_priv *priv, |
1094 | const struct kvaser_msg *msg) | |
1095 | { | |
1096 | struct can_frame *cf; | |
1097 | struct sk_buff *skb; | |
1098 | struct net_device_stats *stats = &priv->netdev->stats; | |
1099 | ||
f5d4abea | 1100 | if (msg->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME | |
080f40a6 OS |
1101 | MSG_FLAG_NERR)) { |
1102 | netdev_err(priv->netdev, "Unknow error (flags: 0x%02x)\n", | |
f5d4abea | 1103 | msg->u.rx_can_header.flag); |
080f40a6 OS |
1104 | |
1105 | stats->rx_errors++; | |
1106 | return; | |
1107 | } | |
1108 | ||
f5d4abea | 1109 | if (msg->u.rx_can_header.flag & MSG_FLAG_OVERRUN) { |
3b07a444 AD |
1110 | stats->rx_over_errors++; |
1111 | stats->rx_errors++; | |
1112 | ||
080f40a6 OS |
1113 | skb = alloc_can_err_skb(priv->netdev, &cf); |
1114 | if (!skb) { | |
1115 | stats->rx_dropped++; | |
1116 | return; | |
1117 | } | |
1118 | ||
1119 | cf->can_id |= CAN_ERR_CRTL; | |
1120 | cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; | |
1121 | ||
080f40a6 OS |
1122 | stats->rx_packets++; |
1123 | stats->rx_bytes += cf->can_dlc; | |
a58518cc | 1124 | netif_rx(skb); |
080f40a6 OS |
1125 | } |
1126 | } | |
1127 | ||
1128 | static void kvaser_usb_rx_can_msg(const struct kvaser_usb *dev, | |
1129 | const struct kvaser_msg *msg) | |
1130 | { | |
1131 | struct kvaser_usb_net_priv *priv; | |
1132 | struct can_frame *cf; | |
1133 | struct sk_buff *skb; | |
1134 | struct net_device_stats *stats; | |
f5d4abea AD |
1135 | u8 channel = msg->u.rx_can_header.channel; |
1136 | const u8 *rx_msg = NULL; /* GCC */ | |
080f40a6 OS |
1137 | |
1138 | if (channel >= dev->nchannels) { | |
1139 | dev_err(dev->udev->dev.parent, | |
1140 | "Invalid channel number (%d)\n", channel); | |
1141 | return; | |
1142 | } | |
1143 | ||
1144 | priv = dev->nets[channel]; | |
1145 | stats = &priv->netdev->stats; | |
1146 | ||
f5d4abea AD |
1147 | if ((msg->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) && |
1148 | (dev->family == KVASER_LEAF && msg->id == CMD_LEAF_LOG_MESSAGE)) { | |
1149 | kvaser_leaf_rx_error(dev, msg); | |
a90f13b2 | 1150 | return; |
f5d4abea AD |
1151 | } else if (msg->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME | |
1152 | MSG_FLAG_NERR | | |
1153 | MSG_FLAG_OVERRUN)) { | |
080f40a6 OS |
1154 | kvaser_usb_rx_can_err(priv, msg); |
1155 | return; | |
f5d4abea | 1156 | } else if (msg->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) { |
080f40a6 OS |
1157 | netdev_warn(priv->netdev, |
1158 | "Unhandled frame (flags: 0x%02x)", | |
f5d4abea | 1159 | msg->u.rx_can_header.flag); |
080f40a6 OS |
1160 | return; |
1161 | } | |
1162 | ||
f5d4abea AD |
1163 | switch (dev->family) { |
1164 | case KVASER_LEAF: | |
1165 | rx_msg = msg->u.leaf.rx_can.msg; | |
1166 | break; | |
1167 | case KVASER_USBCAN: | |
1168 | rx_msg = msg->u.usbcan.rx_can.msg; | |
1169 | break; | |
1170 | } | |
1171 | ||
080f40a6 OS |
1172 | skb = alloc_can_skb(priv->netdev, &cf); |
1173 | if (!skb) { | |
1174 | stats->tx_dropped++; | |
1175 | return; | |
1176 | } | |
1177 | ||
f5d4abea AD |
1178 | if (dev->family == KVASER_LEAF && msg->id == CMD_LEAF_LOG_MESSAGE) { |
1179 | cf->can_id = le32_to_cpu(msg->u.leaf.log_message.id); | |
a90f13b2 JP |
1180 | if (cf->can_id & KVASER_EXTENDED_FRAME) |
1181 | cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG; | |
1182 | else | |
1183 | cf->can_id &= CAN_SFF_MASK; | |
080f40a6 | 1184 | |
f5d4abea | 1185 | cf->can_dlc = get_can_dlc(msg->u.leaf.log_message.dlc); |
a90f13b2 | 1186 | |
f5d4abea | 1187 | if (msg->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME) |
a90f13b2 JP |
1188 | cf->can_id |= CAN_RTR_FLAG; |
1189 | else | |
f5d4abea | 1190 | memcpy(cf->data, &msg->u.leaf.log_message.data, |
a90f13b2 JP |
1191 | cf->can_dlc); |
1192 | } else { | |
f5d4abea | 1193 | cf->can_id = ((rx_msg[0] & 0x1f) << 6) | (rx_msg[1] & 0x3f); |
a90f13b2 JP |
1194 | |
1195 | if (msg->id == CMD_RX_EXT_MESSAGE) { | |
1196 | cf->can_id <<= 18; | |
f5d4abea AD |
1197 | cf->can_id |= ((rx_msg[2] & 0x0f) << 14) | |
1198 | ((rx_msg[3] & 0xff) << 6) | | |
1199 | (rx_msg[4] & 0x3f); | |
a90f13b2 JP |
1200 | cf->can_id |= CAN_EFF_FLAG; |
1201 | } | |
080f40a6 | 1202 | |
f5d4abea | 1203 | cf->can_dlc = get_can_dlc(rx_msg[5]); |
a90f13b2 | 1204 | |
f5d4abea | 1205 | if (msg->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME) |
a90f13b2 JP |
1206 | cf->can_id |= CAN_RTR_FLAG; |
1207 | else | |
f5d4abea | 1208 | memcpy(cf->data, &rx_msg[6], |
a90f13b2 JP |
1209 | cf->can_dlc); |
1210 | } | |
080f40a6 | 1211 | |
080f40a6 OS |
1212 | stats->rx_packets++; |
1213 | stats->rx_bytes += cf->can_dlc; | |
a58518cc | 1214 | netif_rx(skb); |
080f40a6 OS |
1215 | } |
1216 | ||
1217 | static void kvaser_usb_start_chip_reply(const struct kvaser_usb *dev, | |
1218 | const struct kvaser_msg *msg) | |
1219 | { | |
1220 | struct kvaser_usb_net_priv *priv; | |
1221 | u8 channel = msg->u.simple.channel; | |
1222 | ||
1223 | if (channel >= dev->nchannels) { | |
1224 | dev_err(dev->udev->dev.parent, | |
1225 | "Invalid channel number (%d)\n", channel); | |
1226 | return; | |
1227 | } | |
1228 | ||
1229 | priv = dev->nets[channel]; | |
1230 | ||
1231 | if (completion_done(&priv->start_comp) && | |
1232 | netif_queue_stopped(priv->netdev)) { | |
1233 | netif_wake_queue(priv->netdev); | |
1234 | } else { | |
1235 | netif_start_queue(priv->netdev); | |
1236 | complete(&priv->start_comp); | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | static void kvaser_usb_stop_chip_reply(const struct kvaser_usb *dev, | |
1241 | const struct kvaser_msg *msg) | |
1242 | { | |
1243 | struct kvaser_usb_net_priv *priv; | |
1244 | u8 channel = msg->u.simple.channel; | |
1245 | ||
1246 | if (channel >= dev->nchannels) { | |
1247 | dev_err(dev->udev->dev.parent, | |
1248 | "Invalid channel number (%d)\n", channel); | |
1249 | return; | |
1250 | } | |
1251 | ||
1252 | priv = dev->nets[channel]; | |
1253 | ||
1254 | complete(&priv->stop_comp); | |
1255 | } | |
1256 | ||
1257 | static void kvaser_usb_handle_message(const struct kvaser_usb *dev, | |
1258 | const struct kvaser_msg *msg) | |
1259 | { | |
1260 | switch (msg->id) { | |
1261 | case CMD_START_CHIP_REPLY: | |
1262 | kvaser_usb_start_chip_reply(dev, msg); | |
1263 | break; | |
1264 | ||
1265 | case CMD_STOP_CHIP_REPLY: | |
1266 | kvaser_usb_stop_chip_reply(dev, msg); | |
1267 | break; | |
1268 | ||
1269 | case CMD_RX_STD_MESSAGE: | |
1270 | case CMD_RX_EXT_MESSAGE: | |
f5d4abea AD |
1271 | kvaser_usb_rx_can_msg(dev, msg); |
1272 | break; | |
1273 | ||
1274 | case CMD_LEAF_LOG_MESSAGE: | |
1275 | if (dev->family != KVASER_LEAF) | |
1276 | goto warn; | |
080f40a6 OS |
1277 | kvaser_usb_rx_can_msg(dev, msg); |
1278 | break; | |
1279 | ||
1280 | case CMD_CHIP_STATE_EVENT: | |
1281 | case CMD_CAN_ERROR_EVENT: | |
f5d4abea AD |
1282 | if (dev->family == KVASER_LEAF) |
1283 | kvaser_leaf_rx_error(dev, msg); | |
1284 | else | |
1285 | kvaser_usbcan_rx_error(dev, msg); | |
080f40a6 OS |
1286 | break; |
1287 | ||
080f40a6 OS |
1288 | case CMD_TX_ACKNOWLEDGE: |
1289 | kvaser_usb_tx_acknowledge(dev, msg); | |
1290 | break; | |
1291 | ||
f5d4abea AD |
1292 | /* Ignored messages */ |
1293 | case CMD_USBCAN_CLOCK_OVERFLOW_EVENT: | |
1294 | if (dev->family != KVASER_USBCAN) | |
1295 | goto warn; | |
1296 | break; | |
1297 | ||
080f40a6 | 1298 | default: |
f5d4abea | 1299 | warn: dev_warn(dev->udev->dev.parent, |
080f40a6 OS |
1300 | "Unhandled message (%d)\n", msg->id); |
1301 | break; | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | static void kvaser_usb_read_bulk_callback(struct urb *urb) | |
1306 | { | |
1307 | struct kvaser_usb *dev = urb->context; | |
1308 | struct kvaser_msg *msg; | |
1309 | int pos = 0; | |
1310 | int err, i; | |
1311 | ||
1312 | switch (urb->status) { | |
1313 | case 0: | |
1314 | break; | |
1315 | case -ENOENT: | |
1316 | case -ESHUTDOWN: | |
1317 | return; | |
1318 | default: | |
1319 | dev_info(dev->udev->dev.parent, "Rx URB aborted (%d)\n", | |
1320 | urb->status); | |
1321 | goto resubmit_urb; | |
1322 | } | |
1323 | ||
1324 | while (pos <= urb->actual_length - MSG_HEADER_LEN) { | |
1325 | msg = urb->transfer_buffer + pos; | |
1326 | ||
2fec5104 AD |
1327 | /* The Kvaser firmware can only read and write messages that |
1328 | * does not cross the USB's endpoint wMaxPacketSize boundary. | |
1329 | * If a follow-up command crosses such boundary, firmware puts | |
1330 | * a placeholder zero-length command in its place then aligns | |
1331 | * the real command to the next max packet size. | |
1332 | * | |
1333 | * Handle such cases or we're going to miss a significant | |
1334 | * number of events in case of a heavy rx load on the bus. | |
1335 | */ | |
1336 | if (msg->len == 0) { | |
1337 | pos = round_up(pos, dev->bulk_in->wMaxPacketSize); | |
1338 | continue; | |
1339 | } | |
080f40a6 OS |
1340 | |
1341 | if (pos + msg->len > urb->actual_length) { | |
1342 | dev_err(dev->udev->dev.parent, "Format error\n"); | |
1343 | break; | |
1344 | } | |
1345 | ||
1346 | kvaser_usb_handle_message(dev, msg); | |
080f40a6 OS |
1347 | pos += msg->len; |
1348 | } | |
1349 | ||
1350 | resubmit_urb: | |
1351 | usb_fill_bulk_urb(urb, dev->udev, | |
1352 | usb_rcvbulkpipe(dev->udev, | |
1353 | dev->bulk_in->bEndpointAddress), | |
1354 | urb->transfer_buffer, RX_BUFFER_SIZE, | |
1355 | kvaser_usb_read_bulk_callback, dev); | |
1356 | ||
1357 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
1358 | if (err == -ENODEV) { | |
1359 | for (i = 0; i < dev->nchannels; i++) { | |
1360 | if (!dev->nets[i]) | |
1361 | continue; | |
1362 | ||
1363 | netif_device_detach(dev->nets[i]->netdev); | |
1364 | } | |
1365 | } else if (err) { | |
1366 | dev_err(dev->udev->dev.parent, | |
1367 | "Failed resubmitting read bulk urb: %d\n", err); | |
1368 | } | |
1369 | ||
1370 | return; | |
1371 | } | |
1372 | ||
1373 | static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev) | |
1374 | { | |
1375 | int i, err = 0; | |
1376 | ||
1377 | if (dev->rxinitdone) | |
1378 | return 0; | |
1379 | ||
1380 | for (i = 0; i < MAX_RX_URBS; i++) { | |
1381 | struct urb *urb = NULL; | |
1382 | u8 *buf = NULL; | |
1383 | dma_addr_t buf_dma; | |
1384 | ||
1385 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
1386 | if (!urb) { | |
1387 | dev_warn(dev->udev->dev.parent, | |
1388 | "No memory left for URBs\n"); | |
1389 | err = -ENOMEM; | |
1390 | break; | |
1391 | } | |
1392 | ||
1393 | buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE, | |
1394 | GFP_KERNEL, &buf_dma); | |
1395 | if (!buf) { | |
1396 | dev_warn(dev->udev->dev.parent, | |
1397 | "No memory left for USB buffer\n"); | |
1398 | usb_free_urb(urb); | |
1399 | err = -ENOMEM; | |
1400 | break; | |
1401 | } | |
1402 | ||
1403 | usb_fill_bulk_urb(urb, dev->udev, | |
1404 | usb_rcvbulkpipe(dev->udev, | |
1405 | dev->bulk_in->bEndpointAddress), | |
1406 | buf, RX_BUFFER_SIZE, | |
1407 | kvaser_usb_read_bulk_callback, | |
1408 | dev); | |
1409 | urb->transfer_dma = buf_dma; | |
1410 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1411 | usb_anchor_urb(urb, &dev->rx_submitted); | |
1412 | ||
1413 | err = usb_submit_urb(urb, GFP_KERNEL); | |
1414 | if (err) { | |
1415 | usb_unanchor_urb(urb); | |
1416 | usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf, | |
1417 | buf_dma); | |
1418 | usb_free_urb(urb); | |
1419 | break; | |
1420 | } | |
1421 | ||
1422 | dev->rxbuf[i] = buf; | |
1423 | dev->rxbuf_dma[i] = buf_dma; | |
1424 | ||
1425 | usb_free_urb(urb); | |
1426 | } | |
1427 | ||
1428 | if (i == 0) { | |
1429 | dev_warn(dev->udev->dev.parent, | |
1430 | "Cannot setup read URBs, error %d\n", err); | |
1431 | return err; | |
1432 | } else if (i < MAX_RX_URBS) { | |
1433 | dev_warn(dev->udev->dev.parent, | |
1434 | "RX performances may be slow\n"); | |
1435 | } | |
1436 | ||
1437 | dev->rxinitdone = true; | |
1438 | ||
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | static int kvaser_usb_set_opt_mode(const struct kvaser_usb_net_priv *priv) | |
1443 | { | |
1444 | struct kvaser_msg *msg; | |
1445 | int rc; | |
1446 | ||
1447 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); | |
1448 | if (!msg) | |
1449 | return -ENOMEM; | |
1450 | ||
1451 | msg->id = CMD_SET_CTRL_MODE; | |
1452 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_ctrl_mode); | |
1453 | msg->u.ctrl_mode.tid = 0xff; | |
1454 | msg->u.ctrl_mode.channel = priv->channel; | |
1455 | ||
1456 | if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) | |
1457 | msg->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT; | |
1458 | else | |
1459 | msg->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL; | |
1460 | ||
1461 | rc = kvaser_usb_send_msg(priv->dev, msg); | |
1462 | ||
1463 | kfree(msg); | |
1464 | return rc; | |
1465 | } | |
1466 | ||
1467 | static int kvaser_usb_start_chip(struct kvaser_usb_net_priv *priv) | |
1468 | { | |
1469 | int err; | |
1470 | ||
1471 | init_completion(&priv->start_comp); | |
1472 | ||
1473 | err = kvaser_usb_send_simple_msg(priv->dev, CMD_START_CHIP, | |
1474 | priv->channel); | |
1475 | if (err) | |
1476 | return err; | |
1477 | ||
1478 | if (!wait_for_completion_timeout(&priv->start_comp, | |
1479 | msecs_to_jiffies(START_TIMEOUT))) | |
1480 | return -ETIMEDOUT; | |
1481 | ||
1482 | return 0; | |
1483 | } | |
1484 | ||
1485 | static int kvaser_usb_open(struct net_device *netdev) | |
1486 | { | |
1487 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1488 | struct kvaser_usb *dev = priv->dev; | |
1489 | int err; | |
1490 | ||
1491 | err = open_candev(netdev); | |
1492 | if (err) | |
1493 | return err; | |
1494 | ||
1495 | err = kvaser_usb_setup_rx_urbs(dev); | |
1496 | if (err) | |
1497 | goto error; | |
1498 | ||
1499 | err = kvaser_usb_set_opt_mode(priv); | |
1500 | if (err) | |
1501 | goto error; | |
1502 | ||
1503 | err = kvaser_usb_start_chip(priv); | |
1504 | if (err) { | |
1505 | netdev_warn(netdev, "Cannot start device, error %d\n", err); | |
1506 | goto error; | |
1507 | } | |
1508 | ||
1509 | priv->can.state = CAN_STATE_ERROR_ACTIVE; | |
1510 | ||
1511 | return 0; | |
1512 | ||
1513 | error: | |
1514 | close_candev(netdev); | |
1515 | return err; | |
1516 | } | |
1517 | ||
1518 | static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev) | |
1519 | { | |
1520 | int i; | |
1521 | ||
1522 | usb_kill_anchored_urbs(&dev->rx_submitted); | |
1523 | ||
1524 | for (i = 0; i < MAX_RX_URBS; i++) | |
1525 | usb_free_coherent(dev->udev, RX_BUFFER_SIZE, | |
1526 | dev->rxbuf[i], | |
1527 | dev->rxbuf_dma[i]); | |
1528 | ||
f5d4abea | 1529 | for (i = 0; i < dev->nchannels; i++) { |
080f40a6 OS |
1530 | struct kvaser_usb_net_priv *priv = dev->nets[i]; |
1531 | ||
1532 | if (priv) | |
1533 | kvaser_usb_unlink_tx_urbs(priv); | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | static int kvaser_usb_stop_chip(struct kvaser_usb_net_priv *priv) | |
1538 | { | |
1539 | int err; | |
1540 | ||
1541 | init_completion(&priv->stop_comp); | |
1542 | ||
1543 | err = kvaser_usb_send_simple_msg(priv->dev, CMD_STOP_CHIP, | |
1544 | priv->channel); | |
1545 | if (err) | |
1546 | return err; | |
1547 | ||
1548 | if (!wait_for_completion_timeout(&priv->stop_comp, | |
1549 | msecs_to_jiffies(STOP_TIMEOUT))) | |
1550 | return -ETIMEDOUT; | |
1551 | ||
1552 | return 0; | |
1553 | } | |
1554 | ||
1555 | static int kvaser_usb_flush_queue(struct kvaser_usb_net_priv *priv) | |
1556 | { | |
1557 | struct kvaser_msg *msg; | |
1558 | int rc; | |
1559 | ||
1560 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); | |
1561 | if (!msg) | |
1562 | return -ENOMEM; | |
1563 | ||
1564 | msg->id = CMD_FLUSH_QUEUE; | |
1565 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_flush_queue); | |
1566 | msg->u.flush_queue.channel = priv->channel; | |
1567 | msg->u.flush_queue.flags = 0x00; | |
1568 | ||
1569 | rc = kvaser_usb_send_msg(priv->dev, msg); | |
1570 | ||
1571 | kfree(msg); | |
1572 | return rc; | |
1573 | } | |
1574 | ||
1575 | static int kvaser_usb_close(struct net_device *netdev) | |
1576 | { | |
1577 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1578 | struct kvaser_usb *dev = priv->dev; | |
1579 | int err; | |
1580 | ||
1581 | netif_stop_queue(netdev); | |
1582 | ||
1583 | err = kvaser_usb_flush_queue(priv); | |
1584 | if (err) | |
1585 | netdev_warn(netdev, "Cannot flush queue, error %d\n", err); | |
1586 | ||
1587 | if (kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, priv->channel)) | |
1588 | netdev_warn(netdev, "Cannot reset card, error %d\n", err); | |
1589 | ||
1590 | err = kvaser_usb_stop_chip(priv); | |
1591 | if (err) | |
1592 | netdev_warn(netdev, "Cannot stop device, error %d\n", err); | |
1593 | ||
889b77f7 AD |
1594 | /* reset tx contexts */ |
1595 | kvaser_usb_unlink_tx_urbs(priv); | |
1596 | ||
080f40a6 OS |
1597 | priv->can.state = CAN_STATE_STOPPED; |
1598 | close_candev(priv->netdev); | |
1599 | ||
1600 | return 0; | |
1601 | } | |
1602 | ||
1603 | static void kvaser_usb_write_bulk_callback(struct urb *urb) | |
1604 | { | |
1605 | struct kvaser_usb_tx_urb_context *context = urb->context; | |
1606 | struct kvaser_usb_net_priv *priv; | |
1607 | struct net_device *netdev; | |
1608 | ||
1609 | if (WARN_ON(!context)) | |
1610 | return; | |
1611 | ||
1612 | priv = context->priv; | |
1613 | netdev = priv->netdev; | |
1614 | ||
1615 | kfree(urb->transfer_buffer); | |
1616 | ||
1617 | if (!netif_device_present(netdev)) | |
1618 | return; | |
1619 | ||
1620 | if (urb->status) | |
1621 | netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status); | |
1622 | } | |
1623 | ||
1624 | static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb, | |
1625 | struct net_device *netdev) | |
1626 | { | |
1627 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1628 | struct kvaser_usb *dev = priv->dev; | |
1629 | struct net_device_stats *stats = &netdev->stats; | |
1630 | struct can_frame *cf = (struct can_frame *)skb->data; | |
1631 | struct kvaser_usb_tx_urb_context *context = NULL; | |
1632 | struct urb *urb; | |
1633 | void *buf; | |
1634 | struct kvaser_msg *msg; | |
deb2701c | 1635 | int i, err, ret = NETDEV_TX_OK; |
f5d4abea | 1636 | u8 *msg_tx_can_flags = NULL; /* GCC */ |
080f40a6 OS |
1637 | |
1638 | if (can_dropped_invalid_skb(netdev, skb)) | |
1639 | return NETDEV_TX_OK; | |
1640 | ||
1641 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
1642 | if (!urb) { | |
1643 | netdev_err(netdev, "No memory left for URBs\n"); | |
1644 | stats->tx_dropped++; | |
b442723f AD |
1645 | dev_kfree_skb(skb); |
1646 | return NETDEV_TX_OK; | |
080f40a6 OS |
1647 | } |
1648 | ||
1649 | buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC); | |
1650 | if (!buf) { | |
080f40a6 | 1651 | stats->tx_dropped++; |
b442723f | 1652 | dev_kfree_skb(skb); |
deb2701c | 1653 | goto freeurb; |
080f40a6 OS |
1654 | } |
1655 | ||
1656 | msg = buf; | |
1657 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_tx_can); | |
080f40a6 OS |
1658 | msg->u.tx_can.channel = priv->channel; |
1659 | ||
f5d4abea AD |
1660 | switch (dev->family) { |
1661 | case KVASER_LEAF: | |
1662 | msg_tx_can_flags = &msg->u.tx_can.leaf.flags; | |
1663 | break; | |
1664 | case KVASER_USBCAN: | |
1665 | msg_tx_can_flags = &msg->u.tx_can.usbcan.flags; | |
1666 | break; | |
1667 | } | |
1668 | ||
1669 | *msg_tx_can_flags = 0; | |
1670 | ||
080f40a6 OS |
1671 | if (cf->can_id & CAN_EFF_FLAG) { |
1672 | msg->id = CMD_TX_EXT_MESSAGE; | |
1673 | msg->u.tx_can.msg[0] = (cf->can_id >> 24) & 0x1f; | |
1674 | msg->u.tx_can.msg[1] = (cf->can_id >> 18) & 0x3f; | |
1675 | msg->u.tx_can.msg[2] = (cf->can_id >> 14) & 0x0f; | |
1676 | msg->u.tx_can.msg[3] = (cf->can_id >> 6) & 0xff; | |
1677 | msg->u.tx_can.msg[4] = cf->can_id & 0x3f; | |
1678 | } else { | |
1679 | msg->id = CMD_TX_STD_MESSAGE; | |
1680 | msg->u.tx_can.msg[0] = (cf->can_id >> 6) & 0x1f; | |
1681 | msg->u.tx_can.msg[1] = cf->can_id & 0x3f; | |
1682 | } | |
1683 | ||
1684 | msg->u.tx_can.msg[5] = cf->can_dlc; | |
1685 | memcpy(&msg->u.tx_can.msg[6], cf->data, cf->can_dlc); | |
1686 | ||
1687 | if (cf->can_id & CAN_RTR_FLAG) | |
f5d4abea | 1688 | *msg_tx_can_flags |= MSG_FLAG_REMOTE_FRAME; |
080f40a6 OS |
1689 | |
1690 | for (i = 0; i < ARRAY_SIZE(priv->tx_contexts); i++) { | |
1691 | if (priv->tx_contexts[i].echo_index == MAX_TX_URBS) { | |
1692 | context = &priv->tx_contexts[i]; | |
1693 | break; | |
1694 | } | |
1695 | } | |
1696 | ||
b442723f | 1697 | /* This should never happen; it implies a flow control bug */ |
080f40a6 OS |
1698 | if (!context) { |
1699 | netdev_warn(netdev, "cannot find free context\n"); | |
deb2701c AD |
1700 | |
1701 | kfree(buf); | |
080f40a6 | 1702 | ret = NETDEV_TX_BUSY; |
deb2701c | 1703 | goto freeurb; |
080f40a6 OS |
1704 | } |
1705 | ||
1706 | context->priv = priv; | |
1707 | context->echo_index = i; | |
1708 | context->dlc = cf->can_dlc; | |
1709 | ||
1710 | msg->u.tx_can.tid = context->echo_index; | |
1711 | ||
1712 | usb_fill_bulk_urb(urb, dev->udev, | |
1713 | usb_sndbulkpipe(dev->udev, | |
1714 | dev->bulk_out->bEndpointAddress), | |
1715 | buf, msg->len, | |
1716 | kvaser_usb_write_bulk_callback, context); | |
1717 | usb_anchor_urb(urb, &priv->tx_submitted); | |
1718 | ||
1719 | can_put_echo_skb(skb, netdev, context->echo_index); | |
1720 | ||
1721 | atomic_inc(&priv->active_tx_urbs); | |
1722 | ||
1723 | if (atomic_read(&priv->active_tx_urbs) >= MAX_TX_URBS) | |
1724 | netif_stop_queue(netdev); | |
1725 | ||
1726 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
1727 | if (unlikely(err)) { | |
1728 | can_free_echo_skb(netdev, context->echo_index); | |
1729 | ||
080f40a6 OS |
1730 | atomic_dec(&priv->active_tx_urbs); |
1731 | usb_unanchor_urb(urb); | |
1732 | ||
1733 | stats->tx_dropped++; | |
1734 | ||
1735 | if (err == -ENODEV) | |
1736 | netif_device_detach(netdev); | |
1737 | else | |
1738 | netdev_warn(netdev, "Failed tx_urb %d\n", err); | |
1739 | ||
deb2701c | 1740 | goto freeurb; |
080f40a6 OS |
1741 | } |
1742 | ||
deb2701c | 1743 | ret = NETDEV_TX_OK; |
080f40a6 | 1744 | |
deb2701c | 1745 | freeurb: |
080f40a6 | 1746 | usb_free_urb(urb); |
080f40a6 OS |
1747 | return ret; |
1748 | } | |
1749 | ||
1750 | static const struct net_device_ops kvaser_usb_netdev_ops = { | |
1751 | .ndo_open = kvaser_usb_open, | |
1752 | .ndo_stop = kvaser_usb_close, | |
1753 | .ndo_start_xmit = kvaser_usb_start_xmit, | |
c971fa2a | 1754 | .ndo_change_mtu = can_change_mtu, |
080f40a6 OS |
1755 | }; |
1756 | ||
1757 | static const struct can_bittiming_const kvaser_usb_bittiming_const = { | |
1758 | .name = "kvaser_usb", | |
1759 | .tseg1_min = KVASER_USB_TSEG1_MIN, | |
1760 | .tseg1_max = KVASER_USB_TSEG1_MAX, | |
1761 | .tseg2_min = KVASER_USB_TSEG2_MIN, | |
1762 | .tseg2_max = KVASER_USB_TSEG2_MAX, | |
1763 | .sjw_max = KVASER_USB_SJW_MAX, | |
1764 | .brp_min = KVASER_USB_BRP_MIN, | |
1765 | .brp_max = KVASER_USB_BRP_MAX, | |
1766 | .brp_inc = KVASER_USB_BRP_INC, | |
1767 | }; | |
1768 | ||
1769 | static int kvaser_usb_set_bittiming(struct net_device *netdev) | |
1770 | { | |
1771 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1772 | struct can_bittiming *bt = &priv->can.bittiming; | |
1773 | struct kvaser_usb *dev = priv->dev; | |
1774 | struct kvaser_msg *msg; | |
1775 | int rc; | |
1776 | ||
1777 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); | |
1778 | if (!msg) | |
1779 | return -ENOMEM; | |
1780 | ||
1781 | msg->id = CMD_SET_BUS_PARAMS; | |
1782 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_busparams); | |
1783 | msg->u.busparams.channel = priv->channel; | |
1784 | msg->u.busparams.tid = 0xff; | |
1785 | msg->u.busparams.bitrate = cpu_to_le32(bt->bitrate); | |
1786 | msg->u.busparams.sjw = bt->sjw; | |
1787 | msg->u.busparams.tseg1 = bt->prop_seg + bt->phase_seg1; | |
1788 | msg->u.busparams.tseg2 = bt->phase_seg2; | |
1789 | ||
1790 | if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) | |
1791 | msg->u.busparams.no_samp = 3; | |
1792 | else | |
1793 | msg->u.busparams.no_samp = 1; | |
1794 | ||
1795 | rc = kvaser_usb_send_msg(dev, msg); | |
1796 | ||
1797 | kfree(msg); | |
1798 | return rc; | |
1799 | } | |
1800 | ||
1801 | static int kvaser_usb_set_mode(struct net_device *netdev, | |
1802 | enum can_mode mode) | |
1803 | { | |
1804 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1805 | int err; | |
1806 | ||
1807 | switch (mode) { | |
1808 | case CAN_MODE_START: | |
1809 | err = kvaser_usb_simple_msg_async(priv, CMD_START_CHIP); | |
1810 | if (err) | |
1811 | return err; | |
1812 | break; | |
1813 | default: | |
1814 | return -EOPNOTSUPP; | |
1815 | } | |
1816 | ||
1817 | return 0; | |
1818 | } | |
1819 | ||
1820 | static int kvaser_usb_get_berr_counter(const struct net_device *netdev, | |
1821 | struct can_berr_counter *bec) | |
1822 | { | |
1823 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1824 | ||
1825 | *bec = priv->bec; | |
1826 | ||
1827 | return 0; | |
1828 | } | |
1829 | ||
1830 | static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev) | |
1831 | { | |
1832 | int i; | |
1833 | ||
1834 | for (i = 0; i < dev->nchannels; i++) { | |
1835 | if (!dev->nets[i]) | |
1836 | continue; | |
1837 | ||
1838 | unregister_netdev(dev->nets[i]->netdev); | |
1839 | } | |
1840 | ||
1841 | kvaser_usb_unlink_all_urbs(dev); | |
1842 | ||
1843 | for (i = 0; i < dev->nchannels; i++) { | |
1844 | if (!dev->nets[i]) | |
1845 | continue; | |
1846 | ||
1847 | free_candev(dev->nets[i]->netdev); | |
1848 | } | |
1849 | } | |
1850 | ||
1851 | static int kvaser_usb_init_one(struct usb_interface *intf, | |
1852 | const struct usb_device_id *id, int channel) | |
1853 | { | |
1854 | struct kvaser_usb *dev = usb_get_intfdata(intf); | |
1855 | struct net_device *netdev; | |
1856 | struct kvaser_usb_net_priv *priv; | |
1857 | int i, err; | |
1858 | ||
5e7e6e0c AD |
1859 | err = kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, channel); |
1860 | if (err) | |
1861 | return err; | |
1862 | ||
080f40a6 OS |
1863 | netdev = alloc_candev(sizeof(*priv), MAX_TX_URBS); |
1864 | if (!netdev) { | |
1865 | dev_err(&intf->dev, "Cannot alloc candev\n"); | |
1866 | return -ENOMEM; | |
1867 | } | |
1868 | ||
1869 | priv = netdev_priv(netdev); | |
1870 | ||
1871 | init_completion(&priv->start_comp); | |
1872 | init_completion(&priv->stop_comp); | |
1873 | ||
1874 | init_usb_anchor(&priv->tx_submitted); | |
1875 | atomic_set(&priv->active_tx_urbs, 0); | |
1876 | ||
1877 | for (i = 0; i < ARRAY_SIZE(priv->tx_contexts); i++) | |
1878 | priv->tx_contexts[i].echo_index = MAX_TX_URBS; | |
1879 | ||
1880 | priv->dev = dev; | |
1881 | priv->netdev = netdev; | |
1882 | priv->channel = channel; | |
1883 | ||
1884 | priv->can.state = CAN_STATE_STOPPED; | |
1885 | priv->can.clock.freq = CAN_USB_CLOCK; | |
1886 | priv->can.bittiming_const = &kvaser_usb_bittiming_const; | |
1887 | priv->can.do_set_bittiming = kvaser_usb_set_bittiming; | |
1888 | priv->can.do_set_mode = kvaser_usb_set_mode; | |
1889 | if (id->driver_info & KVASER_HAS_TXRX_ERRORS) | |
1890 | priv->can.do_get_berr_counter = kvaser_usb_get_berr_counter; | |
1891 | priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES; | |
1892 | if (id->driver_info & KVASER_HAS_SILENT_MODE) | |
1893 | priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; | |
1894 | ||
1895 | netdev->flags |= IFF_ECHO; | |
1896 | ||
1897 | netdev->netdev_ops = &kvaser_usb_netdev_ops; | |
1898 | ||
1899 | SET_NETDEV_DEV(netdev, &intf->dev); | |
3e66d013 | 1900 | netdev->dev_id = channel; |
080f40a6 OS |
1901 | |
1902 | dev->nets[channel] = priv; | |
1903 | ||
1904 | err = register_candev(netdev); | |
1905 | if (err) { | |
1906 | dev_err(&intf->dev, "Failed to register can device\n"); | |
1907 | free_candev(netdev); | |
1908 | dev->nets[channel] = NULL; | |
1909 | return err; | |
1910 | } | |
1911 | ||
1912 | netdev_dbg(netdev, "device registered\n"); | |
1913 | ||
1914 | return 0; | |
1915 | } | |
1916 | ||
896e23bd OS |
1917 | static int kvaser_usb_get_endpoints(const struct usb_interface *intf, |
1918 | struct usb_endpoint_descriptor **in, | |
1919 | struct usb_endpoint_descriptor **out) | |
080f40a6 OS |
1920 | { |
1921 | const struct usb_host_interface *iface_desc; | |
1922 | struct usb_endpoint_descriptor *endpoint; | |
1923 | int i; | |
1924 | ||
1925 | iface_desc = &intf->altsetting[0]; | |
1926 | ||
1927 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
1928 | endpoint = &iface_desc->endpoint[i].desc; | |
1929 | ||
896e23bd | 1930 | if (!*in && usb_endpoint_is_bulk_in(endpoint)) |
080f40a6 OS |
1931 | *in = endpoint; |
1932 | ||
896e23bd | 1933 | if (!*out && usb_endpoint_is_bulk_out(endpoint)) |
080f40a6 | 1934 | *out = endpoint; |
896e23bd OS |
1935 | |
1936 | /* use first bulk endpoint for in and out */ | |
1937 | if (*in && *out) | |
1938 | return 0; | |
080f40a6 | 1939 | } |
896e23bd OS |
1940 | |
1941 | return -ENODEV; | |
080f40a6 OS |
1942 | } |
1943 | ||
1944 | static int kvaser_usb_probe(struct usb_interface *intf, | |
1945 | const struct usb_device_id *id) | |
1946 | { | |
1947 | struct kvaser_usb *dev; | |
1948 | int err = -ENOMEM; | |
14c10c2a | 1949 | int i, retry = 3; |
080f40a6 OS |
1950 | |
1951 | dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL); | |
1952 | if (!dev) | |
1953 | return -ENOMEM; | |
1954 | ||
f5d4abea AD |
1955 | if (kvaser_is_leaf(id)) { |
1956 | dev->family = KVASER_LEAF; | |
1957 | } else if (kvaser_is_usbcan(id)) { | |
1958 | dev->family = KVASER_USBCAN; | |
1959 | } else { | |
1960 | dev_err(&intf->dev, | |
1961 | "Product ID (%d) does not belong to any known Kvaser USB family", | |
1962 | id->idProduct); | |
1963 | return -ENODEV; | |
1964 | } | |
1965 | ||
896e23bd OS |
1966 | err = kvaser_usb_get_endpoints(intf, &dev->bulk_in, &dev->bulk_out); |
1967 | if (err) { | |
080f40a6 OS |
1968 | dev_err(&intf->dev, "Cannot get usb endpoint(s)"); |
1969 | return err; | |
1970 | } | |
1971 | ||
1972 | dev->udev = interface_to_usbdev(intf); | |
1973 | ||
1974 | init_usb_anchor(&dev->rx_submitted); | |
1975 | ||
1976 | usb_set_intfdata(intf, dev); | |
1977 | ||
14c10c2a AD |
1978 | /* On some x86 laptops, plugging a Kvaser device again after |
1979 | * an unplug makes the firmware always ignore the very first | |
1980 | * command. For such a case, provide some room for retries | |
1981 | * instead of completely exiting the driver. | |
1982 | */ | |
1983 | do { | |
1984 | err = kvaser_usb_get_software_info(dev); | |
1985 | } while (--retry && err == -ETIMEDOUT); | |
1986 | ||
080f40a6 OS |
1987 | if (err) { |
1988 | dev_err(&intf->dev, | |
1989 | "Cannot get software infos, error %d\n", err); | |
1990 | return err; | |
1991 | } | |
1992 | ||
1993 | err = kvaser_usb_get_card_info(dev); | |
1994 | if (err) { | |
1995 | dev_err(&intf->dev, | |
1996 | "Cannot get card infos, error %d\n", err); | |
1997 | return err; | |
1998 | } | |
1999 | ||
2000 | dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n", | |
2001 | ((dev->fw_version >> 24) & 0xff), | |
2002 | ((dev->fw_version >> 16) & 0xff), | |
2003 | (dev->fw_version & 0xffff)); | |
2004 | ||
2005 | for (i = 0; i < dev->nchannels; i++) { | |
2006 | err = kvaser_usb_init_one(intf, id, i); | |
2007 | if (err) { | |
2008 | kvaser_usb_remove_interfaces(dev); | |
2009 | return err; | |
2010 | } | |
2011 | } | |
2012 | ||
2013 | return 0; | |
2014 | } | |
2015 | ||
2016 | static void kvaser_usb_disconnect(struct usb_interface *intf) | |
2017 | { | |
2018 | struct kvaser_usb *dev = usb_get_intfdata(intf); | |
2019 | ||
2020 | usb_set_intfdata(intf, NULL); | |
2021 | ||
2022 | if (!dev) | |
2023 | return; | |
2024 | ||
2025 | kvaser_usb_remove_interfaces(dev); | |
2026 | } | |
2027 | ||
2028 | static struct usb_driver kvaser_usb_driver = { | |
2029 | .name = "kvaser_usb", | |
2030 | .probe = kvaser_usb_probe, | |
2031 | .disconnect = kvaser_usb_disconnect, | |
2032 | .id_table = kvaser_usb_table, | |
2033 | }; | |
2034 | ||
2035 | module_usb_driver(kvaser_usb_driver); | |
2036 | ||
2037 | MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>"); | |
2038 | MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices"); | |
2039 | MODULE_LICENSE("GPL v2"); |