Commit | Line | Data |
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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 | ||
a9dc960c | 17 | #include <linux/spinlock.h> |
2fec5104 | 18 | #include <linux/kernel.h> |
080f40a6 OS |
19 | #include <linux/completion.h> |
20 | #include <linux/module.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/usb.h> | |
23 | ||
24 | #include <linux/can.h> | |
25 | #include <linux/can/dev.h> | |
26 | #include <linux/can/error.h> | |
27 | ||
080f40a6 OS |
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 | ||
082d70b6 | 445 | /* Context for an outstanding, not yet ACKed, transmission */ |
080f40a6 OS |
446 | struct kvaser_usb_tx_urb_context { |
447 | struct kvaser_usb_net_priv *priv; | |
448 | u32 echo_index; | |
449 | int dlc; | |
450 | }; | |
451 | ||
452 | struct kvaser_usb { | |
453 | struct usb_device *udev; | |
454 | struct kvaser_usb_net_priv *nets[MAX_NET_DEVICES]; | |
455 | ||
456 | struct usb_endpoint_descriptor *bulk_in, *bulk_out; | |
457 | struct usb_anchor rx_submitted; | |
458 | ||
082d70b6 AD |
459 | /* @max_tx_urbs: Firmware-reported maximum number of oustanding, |
460 | * not yet ACKed, transmissions on this device. This value is | |
461 | * also used as a sentinel for marking free tx contexts. | |
462 | */ | |
080f40a6 OS |
463 | u32 fw_version; |
464 | unsigned int nchannels; | |
082d70b6 | 465 | unsigned int max_tx_urbs; |
f5d4abea | 466 | enum kvaser_usb_family family; |
080f40a6 OS |
467 | |
468 | bool rxinitdone; | |
469 | void *rxbuf[MAX_RX_URBS]; | |
470 | dma_addr_t rxbuf_dma[MAX_RX_URBS]; | |
471 | }; | |
472 | ||
473 | struct kvaser_usb_net_priv { | |
474 | struct can_priv can; | |
082d70b6 | 475 | struct can_berr_counter bec; |
080f40a6 OS |
476 | |
477 | struct kvaser_usb *dev; | |
478 | struct net_device *netdev; | |
479 | int channel; | |
480 | ||
082d70b6 AD |
481 | struct completion start_comp, stop_comp; |
482 | struct usb_anchor tx_submitted; | |
483 | ||
484 | spinlock_t tx_contexts_lock; | |
485 | int active_tx_contexts; | |
486 | struct kvaser_usb_tx_urb_context tx_contexts[]; | |
080f40a6 OS |
487 | }; |
488 | ||
489 | static const struct usb_device_id kvaser_usb_table[] = { | |
f5d4abea | 490 | /* Leaf family IDs */ |
080f40a6 OS |
491 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) }, |
492 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) }, | |
493 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID), | |
494 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
495 | KVASER_HAS_SILENT_MODE }, | |
496 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID), | |
497 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
498 | KVASER_HAS_SILENT_MODE }, | |
499 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID), | |
500 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
501 | KVASER_HAS_SILENT_MODE }, | |
502 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID), | |
503 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
504 | KVASER_HAS_SILENT_MODE }, | |
505 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID), | |
506 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
507 | KVASER_HAS_SILENT_MODE }, | |
508 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID), | |
509 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
510 | KVASER_HAS_SILENT_MODE }, | |
511 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID), | |
512 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
513 | KVASER_HAS_SILENT_MODE }, | |
514 | { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID), | |
515 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
516 | KVASER_HAS_SILENT_MODE }, | |
517 | { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID), | |
518 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
519 | KVASER_HAS_SILENT_MODE }, | |
520 | { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID), | |
521 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
522 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) }, | |
523 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID), | |
524 | .driver_info = KVASER_HAS_TXRX_ERRORS | | |
525 | KVASER_HAS_SILENT_MODE }, | |
526 | { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID), | |
527 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
528 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID), | |
529 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
530 | { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID), | |
531 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
532 | { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID), | |
533 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
534 | { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID), | |
535 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
536 | { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID), | |
537 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
b4f20130 OS |
538 | { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID) }, |
539 | { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID) }, | |
f5d4abea AD |
540 | |
541 | /* USBCANII family IDs */ | |
542 | { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID), | |
543 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
544 | { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID), | |
545 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
546 | { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID), | |
547 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
548 | { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID), | |
549 | .driver_info = KVASER_HAS_TXRX_ERRORS }, | |
550 | ||
080f40a6 OS |
551 | { } |
552 | }; | |
553 | MODULE_DEVICE_TABLE(usb, kvaser_usb_table); | |
554 | ||
555 | static inline int kvaser_usb_send_msg(const struct kvaser_usb *dev, | |
556 | struct kvaser_msg *msg) | |
557 | { | |
558 | int actual_len; | |
559 | ||
560 | return usb_bulk_msg(dev->udev, | |
561 | usb_sndbulkpipe(dev->udev, | |
562 | dev->bulk_out->bEndpointAddress), | |
563 | msg, msg->len, &actual_len, | |
564 | USB_SEND_TIMEOUT); | |
565 | } | |
566 | ||
567 | static int kvaser_usb_wait_msg(const struct kvaser_usb *dev, u8 id, | |
568 | struct kvaser_msg *msg) | |
569 | { | |
570 | struct kvaser_msg *tmp; | |
571 | void *buf; | |
572 | int actual_len; | |
573 | int err; | |
e59e36e7 OS |
574 | int pos; |
575 | unsigned long to = jiffies + msecs_to_jiffies(USB_RECV_TIMEOUT); | |
080f40a6 OS |
576 | |
577 | buf = kzalloc(RX_BUFFER_SIZE, GFP_KERNEL); | |
578 | if (!buf) | |
579 | return -ENOMEM; | |
580 | ||
e59e36e7 OS |
581 | do { |
582 | err = usb_bulk_msg(dev->udev, | |
583 | usb_rcvbulkpipe(dev->udev, | |
584 | dev->bulk_in->bEndpointAddress), | |
585 | buf, RX_BUFFER_SIZE, &actual_len, | |
586 | USB_RECV_TIMEOUT); | |
587 | if (err < 0) | |
588 | goto end; | |
080f40a6 | 589 | |
e59e36e7 OS |
590 | pos = 0; |
591 | while (pos <= actual_len - MSG_HEADER_LEN) { | |
592 | tmp = buf + pos; | |
080f40a6 | 593 | |
2fec5104 AD |
594 | /* Handle messages crossing the USB endpoint max packet |
595 | * size boundary. Check kvaser_usb_read_bulk_callback() | |
596 | * for further details. | |
597 | */ | |
598 | if (tmp->len == 0) { | |
7e184c28 AD |
599 | pos = round_up(pos, le16_to_cpu(dev->bulk_in-> |
600 | wMaxPacketSize)); | |
2fec5104 AD |
601 | continue; |
602 | } | |
080f40a6 | 603 | |
e59e36e7 OS |
604 | if (pos + tmp->len > actual_len) { |
605 | dev_err(dev->udev->dev.parent, | |
606 | "Format error\n"); | |
607 | break; | |
608 | } | |
080f40a6 | 609 | |
e59e36e7 OS |
610 | if (tmp->id == id) { |
611 | memcpy(msg, tmp, tmp->len); | |
612 | goto end; | |
613 | } | |
080f40a6 | 614 | |
e59e36e7 OS |
615 | pos += tmp->len; |
616 | } | |
617 | } while (time_before(jiffies, to)); | |
080f40a6 OS |
618 | |
619 | err = -EINVAL; | |
620 | ||
621 | end: | |
622 | kfree(buf); | |
623 | ||
624 | return err; | |
625 | } | |
626 | ||
627 | static int kvaser_usb_send_simple_msg(const struct kvaser_usb *dev, | |
628 | u8 msg_id, int channel) | |
629 | { | |
630 | struct kvaser_msg *msg; | |
631 | int rc; | |
632 | ||
633 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); | |
634 | if (!msg) | |
635 | return -ENOMEM; | |
636 | ||
637 | msg->id = msg_id; | |
638 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple); | |
639 | msg->u.simple.channel = channel; | |
640 | msg->u.simple.tid = 0xff; | |
641 | ||
642 | rc = kvaser_usb_send_msg(dev, msg); | |
643 | ||
644 | kfree(msg); | |
645 | return rc; | |
646 | } | |
647 | ||
648 | static int kvaser_usb_get_software_info(struct kvaser_usb *dev) | |
649 | { | |
650 | struct kvaser_msg msg; | |
651 | int err; | |
652 | ||
653 | err = kvaser_usb_send_simple_msg(dev, CMD_GET_SOFTWARE_INFO, 0); | |
654 | if (err) | |
655 | return err; | |
656 | ||
657 | err = kvaser_usb_wait_msg(dev, CMD_GET_SOFTWARE_INFO_REPLY, &msg); | |
658 | if (err) | |
659 | return err; | |
660 | ||
f5d4abea AD |
661 | switch (dev->family) { |
662 | case KVASER_LEAF: | |
663 | dev->fw_version = le32_to_cpu(msg.u.leaf.softinfo.fw_version); | |
082d70b6 AD |
664 | dev->max_tx_urbs = |
665 | le16_to_cpu(msg.u.leaf.softinfo.max_outstanding_tx); | |
f5d4abea AD |
666 | break; |
667 | case KVASER_USBCAN: | |
668 | dev->fw_version = le32_to_cpu(msg.u.usbcan.softinfo.fw_version); | |
082d70b6 AD |
669 | dev->max_tx_urbs = |
670 | le16_to_cpu(msg.u.usbcan.softinfo.max_outstanding_tx); | |
f5d4abea AD |
671 | break; |
672 | } | |
080f40a6 OS |
673 | |
674 | return 0; | |
675 | } | |
676 | ||
677 | static int kvaser_usb_get_card_info(struct kvaser_usb *dev) | |
678 | { | |
679 | struct kvaser_msg msg; | |
680 | int err; | |
681 | ||
682 | err = kvaser_usb_send_simple_msg(dev, CMD_GET_CARD_INFO, 0); | |
683 | if (err) | |
684 | return err; | |
685 | ||
686 | err = kvaser_usb_wait_msg(dev, CMD_GET_CARD_INFO_REPLY, &msg); | |
687 | if (err) | |
688 | return err; | |
689 | ||
690 | dev->nchannels = msg.u.cardinfo.nchannels; | |
f5d4abea AD |
691 | if ((dev->nchannels > MAX_NET_DEVICES) || |
692 | (dev->family == KVASER_USBCAN && | |
693 | dev->nchannels > MAX_USBCAN_NET_DEVICES)) | |
862474f8 | 694 | return -EINVAL; |
080f40a6 OS |
695 | |
696 | return 0; | |
697 | } | |
698 | ||
699 | static void kvaser_usb_tx_acknowledge(const struct kvaser_usb *dev, | |
700 | const struct kvaser_msg *msg) | |
701 | { | |
702 | struct net_device_stats *stats; | |
703 | struct kvaser_usb_tx_urb_context *context; | |
704 | struct kvaser_usb_net_priv *priv; | |
705 | struct sk_buff *skb; | |
706 | struct can_frame *cf; | |
a9dc960c | 707 | unsigned long flags; |
f5d4abea AD |
708 | u8 channel, tid; |
709 | ||
710 | channel = msg->u.tx_acknowledge_header.channel; | |
711 | tid = msg->u.tx_acknowledge_header.tid; | |
080f40a6 OS |
712 | |
713 | if (channel >= dev->nchannels) { | |
714 | dev_err(dev->udev->dev.parent, | |
715 | "Invalid channel number (%d)\n", channel); | |
716 | return; | |
717 | } | |
718 | ||
719 | priv = dev->nets[channel]; | |
720 | ||
721 | if (!netif_device_present(priv->netdev)) | |
722 | return; | |
723 | ||
724 | stats = &priv->netdev->stats; | |
725 | ||
082d70b6 | 726 | context = &priv->tx_contexts[tid % dev->max_tx_urbs]; |
080f40a6 OS |
727 | |
728 | /* Sometimes the state change doesn't come after a bus-off event */ | |
729 | if (priv->can.restart_ms && | |
730 | (priv->can.state >= CAN_STATE_BUS_OFF)) { | |
731 | skb = alloc_can_err_skb(priv->netdev, &cf); | |
732 | if (skb) { | |
733 | cf->can_id |= CAN_ERR_RESTARTED; | |
080f40a6 OS |
734 | |
735 | stats->rx_packets++; | |
736 | stats->rx_bytes += cf->can_dlc; | |
a58518cc | 737 | netif_rx(skb); |
080f40a6 OS |
738 | } else { |
739 | netdev_err(priv->netdev, | |
740 | "No memory left for err_skb\n"); | |
741 | } | |
742 | ||
743 | priv->can.can_stats.restarts++; | |
744 | netif_carrier_on(priv->netdev); | |
745 | ||
746 | priv->can.state = CAN_STATE_ERROR_ACTIVE; | |
747 | } | |
748 | ||
749 | stats->tx_packets++; | |
750 | stats->tx_bytes += context->dlc; | |
080f40a6 | 751 | |
a9dc960c | 752 | spin_lock_irqsave(&priv->tx_contexts_lock, flags); |
080f40a6 | 753 | |
a9dc960c | 754 | can_get_echo_skb(priv->netdev, context->echo_index); |
082d70b6 | 755 | context->echo_index = dev->max_tx_urbs; |
a9dc960c | 756 | --priv->active_tx_contexts; |
080f40a6 | 757 | netif_wake_queue(priv->netdev); |
a9dc960c AD |
758 | |
759 | spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); | |
080f40a6 OS |
760 | } |
761 | ||
762 | static void kvaser_usb_simple_msg_callback(struct urb *urb) | |
763 | { | |
764 | struct net_device *netdev = urb->context; | |
765 | ||
766 | kfree(urb->transfer_buffer); | |
767 | ||
768 | if (urb->status) | |
769 | netdev_warn(netdev, "urb status received: %d\n", | |
770 | urb->status); | |
771 | } | |
772 | ||
773 | static int kvaser_usb_simple_msg_async(struct kvaser_usb_net_priv *priv, | |
774 | u8 msg_id) | |
775 | { | |
776 | struct kvaser_usb *dev = priv->dev; | |
777 | struct net_device *netdev = priv->netdev; | |
778 | struct kvaser_msg *msg; | |
779 | struct urb *urb; | |
780 | void *buf; | |
781 | int err; | |
782 | ||
783 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
784 | if (!urb) { | |
785 | netdev_err(netdev, "No memory left for URBs\n"); | |
786 | return -ENOMEM; | |
787 | } | |
788 | ||
789 | buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC); | |
790 | if (!buf) { | |
080f40a6 OS |
791 | usb_free_urb(urb); |
792 | return -ENOMEM; | |
793 | } | |
794 | ||
795 | msg = (struct kvaser_msg *)buf; | |
796 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple); | |
797 | msg->id = msg_id; | |
798 | msg->u.simple.channel = priv->channel; | |
799 | ||
800 | usb_fill_bulk_urb(urb, dev->udev, | |
801 | usb_sndbulkpipe(dev->udev, | |
802 | dev->bulk_out->bEndpointAddress), | |
803 | buf, msg->len, | |
3803fa69 | 804 | kvaser_usb_simple_msg_callback, netdev); |
080f40a6 OS |
805 | usb_anchor_urb(urb, &priv->tx_submitted); |
806 | ||
807 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
808 | if (err) { | |
809 | netdev_err(netdev, "Error transmitting URB\n"); | |
810 | usb_unanchor_urb(urb); | |
811 | usb_free_urb(urb); | |
080f40a6 OS |
812 | return err; |
813 | } | |
814 | ||
815 | usb_free_urb(urb); | |
816 | ||
817 | return 0; | |
818 | } | |
819 | ||
3b07a444 | 820 | static void kvaser_usb_rx_error_update_can_state(struct kvaser_usb_net_priv *priv, |
96d7f106 AD |
821 | const struct kvaser_usb_error_summary *es, |
822 | struct can_frame *cf) | |
3b07a444 | 823 | { |
f5d4abea AD |
824 | struct kvaser_usb *dev = priv->dev; |
825 | struct net_device_stats *stats = &priv->netdev->stats; | |
96d7f106 | 826 | enum can_state cur_state, new_state, tx_state, rx_state; |
3b07a444 AD |
827 | |
828 | netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status); | |
829 | ||
96d7f106 AD |
830 | new_state = cur_state = priv->can.state; |
831 | ||
832 | if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) | |
3b07a444 | 833 | new_state = CAN_STATE_BUS_OFF; |
96d7f106 | 834 | else if (es->status & M16C_STATE_BUS_PASSIVE) |
3b07a444 | 835 | new_state = CAN_STATE_ERROR_PASSIVE; |
96d7f106 | 836 | else if (es->status & M16C_STATE_BUS_ERROR) { |
a9ca6e13 AD |
837 | /* Guard against spurious error events after a busoff */ |
838 | if (cur_state < CAN_STATE_BUS_OFF) { | |
839 | if ((es->txerr >= 128) || (es->rxerr >= 128)) | |
840 | new_state = CAN_STATE_ERROR_PASSIVE; | |
841 | else if ((es->txerr >= 96) || (es->rxerr >= 96)) | |
842 | new_state = CAN_STATE_ERROR_WARNING; | |
843 | else if (cur_state > CAN_STATE_ERROR_ACTIVE) | |
844 | new_state = CAN_STATE_ERROR_ACTIVE; | |
845 | } | |
3b07a444 AD |
846 | } |
847 | ||
848 | if (!es->status) | |
849 | new_state = CAN_STATE_ERROR_ACTIVE; | |
850 | ||
96d7f106 AD |
851 | if (new_state != cur_state) { |
852 | tx_state = (es->txerr >= es->rxerr) ? new_state : 0; | |
853 | rx_state = (es->txerr <= es->rxerr) ? new_state : 0; | |
854 | ||
855 | can_change_state(priv->netdev, cf, tx_state, rx_state); | |
856 | } | |
857 | ||
3b07a444 | 858 | if (priv->can.restart_ms && |
96d7f106 | 859 | (cur_state >= CAN_STATE_BUS_OFF) && |
3b07a444 AD |
860 | (new_state < CAN_STATE_BUS_OFF)) { |
861 | priv->can.can_stats.restarts++; | |
862 | } | |
863 | ||
f5d4abea AD |
864 | switch (dev->family) { |
865 | case KVASER_LEAF: | |
866 | if (es->leaf.error_factor) { | |
867 | priv->can.can_stats.bus_error++; | |
868 | stats->rx_errors++; | |
869 | } | |
870 | break; | |
871 | case KVASER_USBCAN: | |
872 | if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR) | |
873 | stats->tx_errors++; | |
874 | if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR) | |
875 | stats->rx_errors++; | |
876 | if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) { | |
877 | priv->can.can_stats.bus_error++; | |
878 | } | |
879 | break; | |
3b07a444 AD |
880 | } |
881 | ||
882 | priv->bec.txerr = es->txerr; | |
883 | priv->bec.rxerr = es->rxerr; | |
3b07a444 AD |
884 | } |
885 | ||
080f40a6 | 886 | static void kvaser_usb_rx_error(const struct kvaser_usb *dev, |
f5d4abea | 887 | const struct kvaser_usb_error_summary *es) |
080f40a6 | 888 | { |
96d7f106 | 889 | struct can_frame *cf, tmp_cf = { .can_id = CAN_ERR_FLAG, .can_dlc = CAN_ERR_DLC }; |
080f40a6 OS |
890 | struct sk_buff *skb; |
891 | struct net_device_stats *stats; | |
892 | struct kvaser_usb_net_priv *priv; | |
96d7f106 | 893 | enum can_state old_state, new_state; |
080f40a6 | 894 | |
f5d4abea | 895 | if (es->channel >= dev->nchannels) { |
080f40a6 | 896 | dev_err(dev->udev->dev.parent, |
f5d4abea | 897 | "Invalid channel number (%d)\n", es->channel); |
080f40a6 OS |
898 | return; |
899 | } | |
900 | ||
f5d4abea | 901 | priv = dev->nets[es->channel]; |
080f40a6 OS |
902 | stats = &priv->netdev->stats; |
903 | ||
3b07a444 | 904 | /* Update all of the can interface's state and error counters before |
96d7f106 AD |
905 | * trying any memory allocation that can actually fail with -ENOMEM. |
906 | * | |
907 | * We send a temporary stack-allocated error can frame to | |
908 | * can_change_state() for the very same reason. | |
909 | * | |
910 | * TODO: Split can_change_state() responsibility between updating the | |
911 | * can interface's state and counters, and the setting up of can error | |
912 | * frame ID and data to userspace. Remove stack allocation afterwards. | |
3b07a444 AD |
913 | */ |
914 | old_state = priv->can.state; | |
f5d4abea | 915 | kvaser_usb_rx_error_update_can_state(priv, es, &tmp_cf); |
96d7f106 | 916 | new_state = priv->can.state; |
3b07a444 | 917 | |
080f40a6 OS |
918 | skb = alloc_can_err_skb(priv->netdev, &cf); |
919 | if (!skb) { | |
920 | stats->rx_dropped++; | |
921 | return; | |
922 | } | |
96d7f106 AD |
923 | memcpy(cf, &tmp_cf, sizeof(*cf)); |
924 | ||
925 | if (new_state != old_state) { | |
f5d4abea | 926 | if (es->status & |
96d7f106 AD |
927 | (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) { |
928 | if (!priv->can.restart_ms) | |
929 | kvaser_usb_simple_msg_async(priv, CMD_STOP_CHIP); | |
930 | netif_carrier_off(priv->netdev); | |
080f40a6 | 931 | } |
080f40a6 | 932 | |
96d7f106 AD |
933 | if (priv->can.restart_ms && |
934 | (old_state >= CAN_STATE_BUS_OFF) && | |
935 | (new_state < CAN_STATE_BUS_OFF)) { | |
936 | cf->can_id |= CAN_ERR_RESTARTED; | |
937 | netif_carrier_on(priv->netdev); | |
938 | } | |
080f40a6 OS |
939 | } |
940 | ||
f5d4abea AD |
941 | switch (dev->family) { |
942 | case KVASER_LEAF: | |
943 | if (es->leaf.error_factor) { | |
944 | cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT; | |
945 | ||
946 | if (es->leaf.error_factor & M16C_EF_ACKE) | |
947 | cf->data[3] |= (CAN_ERR_PROT_LOC_ACK); | |
948 | if (es->leaf.error_factor & M16C_EF_CRCE) | |
949 | cf->data[3] |= (CAN_ERR_PROT_LOC_CRC_SEQ | | |
950 | CAN_ERR_PROT_LOC_CRC_DEL); | |
951 | if (es->leaf.error_factor & M16C_EF_FORME) | |
952 | cf->data[2] |= CAN_ERR_PROT_FORM; | |
953 | if (es->leaf.error_factor & M16C_EF_STFE) | |
954 | cf->data[2] |= CAN_ERR_PROT_STUFF; | |
955 | if (es->leaf.error_factor & M16C_EF_BITE0) | |
956 | cf->data[2] |= CAN_ERR_PROT_BIT0; | |
957 | if (es->leaf.error_factor & M16C_EF_BITE1) | |
958 | cf->data[2] |= CAN_ERR_PROT_BIT1; | |
959 | if (es->leaf.error_factor & M16C_EF_TRE) | |
960 | cf->data[2] |= CAN_ERR_PROT_TX; | |
961 | } | |
962 | break; | |
963 | case KVASER_USBCAN: | |
964 | if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) { | |
965 | cf->can_id |= CAN_ERR_BUSERROR; | |
966 | } | |
967 | break; | |
080f40a6 OS |
968 | } |
969 | ||
f5d4abea AD |
970 | cf->data[6] = es->txerr; |
971 | cf->data[7] = es->rxerr; | |
080f40a6 | 972 | |
080f40a6 OS |
973 | stats->rx_packets++; |
974 | stats->rx_bytes += cf->can_dlc; | |
a58518cc | 975 | netif_rx(skb); |
080f40a6 OS |
976 | } |
977 | ||
f5d4abea AD |
978 | /* For USBCAN, report error to userspace iff the channels's errors counter |
979 | * has changed, or we're the only channel seeing a bus error state. | |
980 | */ | |
981 | static void kvaser_usbcan_conditionally_rx_error(const struct kvaser_usb *dev, | |
982 | struct kvaser_usb_error_summary *es) | |
983 | { | |
984 | struct kvaser_usb_net_priv *priv; | |
985 | int channel; | |
986 | bool report_error; | |
987 | ||
988 | channel = es->channel; | |
989 | if (channel >= dev->nchannels) { | |
990 | dev_err(dev->udev->dev.parent, | |
991 | "Invalid channel number (%d)\n", channel); | |
992 | return; | |
993 | } | |
994 | ||
995 | priv = dev->nets[channel]; | |
996 | report_error = false; | |
997 | ||
998 | if (es->txerr != priv->bec.txerr) { | |
999 | es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR; | |
1000 | report_error = true; | |
1001 | } | |
1002 | if (es->rxerr != priv->bec.rxerr) { | |
1003 | es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR; | |
1004 | report_error = true; | |
1005 | } | |
1006 | if ((es->status & M16C_STATE_BUS_ERROR) && | |
1007 | !(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) { | |
1008 | es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR; | |
1009 | report_error = true; | |
1010 | } | |
1011 | ||
1012 | if (report_error) | |
1013 | kvaser_usb_rx_error(dev, es); | |
1014 | } | |
1015 | ||
1016 | static void kvaser_usbcan_rx_error(const struct kvaser_usb *dev, | |
1017 | const struct kvaser_msg *msg) | |
1018 | { | |
1019 | struct kvaser_usb_error_summary es = { }; | |
1020 | ||
1021 | switch (msg->id) { | |
1022 | /* Sometimes errors are sent as unsolicited chip state events */ | |
1023 | case CMD_CHIP_STATE_EVENT: | |
1024 | es.channel = msg->u.usbcan.chip_state_event.channel; | |
1025 | es.status = msg->u.usbcan.chip_state_event.status; | |
1026 | es.txerr = msg->u.usbcan.chip_state_event.tx_errors_count; | |
1027 | es.rxerr = msg->u.usbcan.chip_state_event.rx_errors_count; | |
1028 | kvaser_usbcan_conditionally_rx_error(dev, &es); | |
1029 | break; | |
1030 | ||
1031 | case CMD_CAN_ERROR_EVENT: | |
1032 | es.channel = 0; | |
1033 | es.status = msg->u.usbcan.error_event.status_ch0; | |
1034 | es.txerr = msg->u.usbcan.error_event.tx_errors_count_ch0; | |
1035 | es.rxerr = msg->u.usbcan.error_event.rx_errors_count_ch0; | |
1036 | es.usbcan.other_ch_status = | |
1037 | msg->u.usbcan.error_event.status_ch1; | |
1038 | kvaser_usbcan_conditionally_rx_error(dev, &es); | |
1039 | ||
1040 | /* The USBCAN firmware supports up to 2 channels. | |
1041 | * Now that ch0 was checked, check if ch1 has any errors. | |
1042 | */ | |
1043 | if (dev->nchannels == MAX_USBCAN_NET_DEVICES) { | |
1044 | es.channel = 1; | |
1045 | es.status = msg->u.usbcan.error_event.status_ch1; | |
1046 | es.txerr = msg->u.usbcan.error_event.tx_errors_count_ch1; | |
1047 | es.rxerr = msg->u.usbcan.error_event.rx_errors_count_ch1; | |
1048 | es.usbcan.other_ch_status = | |
1049 | msg->u.usbcan.error_event.status_ch0; | |
1050 | kvaser_usbcan_conditionally_rx_error(dev, &es); | |
1051 | } | |
1052 | break; | |
1053 | ||
1054 | default: | |
1055 | dev_err(dev->udev->dev.parent, "Invalid msg id (%d)\n", | |
1056 | msg->id); | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | static void kvaser_leaf_rx_error(const struct kvaser_usb *dev, | |
1061 | const struct kvaser_msg *msg) | |
1062 | { | |
1063 | struct kvaser_usb_error_summary es = { }; | |
1064 | ||
1065 | switch (msg->id) { | |
1066 | case CMD_CAN_ERROR_EVENT: | |
1067 | es.channel = msg->u.leaf.error_event.channel; | |
1068 | es.status = msg->u.leaf.error_event.status; | |
1069 | es.txerr = msg->u.leaf.error_event.tx_errors_count; | |
1070 | es.rxerr = msg->u.leaf.error_event.rx_errors_count; | |
1071 | es.leaf.error_factor = msg->u.leaf.error_event.error_factor; | |
1072 | break; | |
1073 | case CMD_LEAF_LOG_MESSAGE: | |
1074 | es.channel = msg->u.leaf.log_message.channel; | |
1075 | es.status = msg->u.leaf.log_message.data[0]; | |
1076 | es.txerr = msg->u.leaf.log_message.data[2]; | |
1077 | es.rxerr = msg->u.leaf.log_message.data[3]; | |
1078 | es.leaf.error_factor = msg->u.leaf.log_message.data[1]; | |
1079 | break; | |
1080 | case CMD_CHIP_STATE_EVENT: | |
1081 | es.channel = msg->u.leaf.chip_state_event.channel; | |
1082 | es.status = msg->u.leaf.chip_state_event.status; | |
1083 | es.txerr = msg->u.leaf.chip_state_event.tx_errors_count; | |
1084 | es.rxerr = msg->u.leaf.chip_state_event.rx_errors_count; | |
1085 | es.leaf.error_factor = 0; | |
1086 | break; | |
1087 | default: | |
1088 | dev_err(dev->udev->dev.parent, "Invalid msg id (%d)\n", | |
1089 | msg->id); | |
1090 | return; | |
1091 | } | |
1092 | ||
1093 | kvaser_usb_rx_error(dev, &es); | |
1094 | } | |
1095 | ||
080f40a6 OS |
1096 | static void kvaser_usb_rx_can_err(const struct kvaser_usb_net_priv *priv, |
1097 | const struct kvaser_msg *msg) | |
1098 | { | |
1099 | struct can_frame *cf; | |
1100 | struct sk_buff *skb; | |
1101 | struct net_device_stats *stats = &priv->netdev->stats; | |
1102 | ||
f5d4abea | 1103 | if (msg->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME | |
080f40a6 | 1104 | MSG_FLAG_NERR)) { |
94435f76 | 1105 | netdev_err(priv->netdev, "Unknown error (flags: 0x%02x)\n", |
f5d4abea | 1106 | msg->u.rx_can_header.flag); |
080f40a6 OS |
1107 | |
1108 | stats->rx_errors++; | |
1109 | return; | |
1110 | } | |
1111 | ||
f5d4abea | 1112 | if (msg->u.rx_can_header.flag & MSG_FLAG_OVERRUN) { |
3b07a444 AD |
1113 | stats->rx_over_errors++; |
1114 | stats->rx_errors++; | |
1115 | ||
080f40a6 OS |
1116 | skb = alloc_can_err_skb(priv->netdev, &cf); |
1117 | if (!skb) { | |
1118 | stats->rx_dropped++; | |
1119 | return; | |
1120 | } | |
1121 | ||
1122 | cf->can_id |= CAN_ERR_CRTL; | |
1123 | cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; | |
1124 | ||
080f40a6 OS |
1125 | stats->rx_packets++; |
1126 | stats->rx_bytes += cf->can_dlc; | |
a58518cc | 1127 | netif_rx(skb); |
080f40a6 OS |
1128 | } |
1129 | } | |
1130 | ||
1131 | static void kvaser_usb_rx_can_msg(const struct kvaser_usb *dev, | |
1132 | const struct kvaser_msg *msg) | |
1133 | { | |
1134 | struct kvaser_usb_net_priv *priv; | |
1135 | struct can_frame *cf; | |
1136 | struct sk_buff *skb; | |
1137 | struct net_device_stats *stats; | |
f5d4abea AD |
1138 | u8 channel = msg->u.rx_can_header.channel; |
1139 | const u8 *rx_msg = NULL; /* GCC */ | |
080f40a6 OS |
1140 | |
1141 | if (channel >= dev->nchannels) { | |
1142 | dev_err(dev->udev->dev.parent, | |
1143 | "Invalid channel number (%d)\n", channel); | |
1144 | return; | |
1145 | } | |
1146 | ||
1147 | priv = dev->nets[channel]; | |
1148 | stats = &priv->netdev->stats; | |
1149 | ||
f5d4abea AD |
1150 | if ((msg->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) && |
1151 | (dev->family == KVASER_LEAF && msg->id == CMD_LEAF_LOG_MESSAGE)) { | |
1152 | kvaser_leaf_rx_error(dev, msg); | |
a90f13b2 | 1153 | return; |
f5d4abea AD |
1154 | } else if (msg->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME | |
1155 | MSG_FLAG_NERR | | |
1156 | MSG_FLAG_OVERRUN)) { | |
080f40a6 OS |
1157 | kvaser_usb_rx_can_err(priv, msg); |
1158 | return; | |
f5d4abea | 1159 | } else if (msg->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) { |
080f40a6 OS |
1160 | netdev_warn(priv->netdev, |
1161 | "Unhandled frame (flags: 0x%02x)", | |
f5d4abea | 1162 | msg->u.rx_can_header.flag); |
080f40a6 OS |
1163 | return; |
1164 | } | |
1165 | ||
f5d4abea AD |
1166 | switch (dev->family) { |
1167 | case KVASER_LEAF: | |
1168 | rx_msg = msg->u.leaf.rx_can.msg; | |
1169 | break; | |
1170 | case KVASER_USBCAN: | |
1171 | rx_msg = msg->u.usbcan.rx_can.msg; | |
1172 | break; | |
1173 | } | |
1174 | ||
080f40a6 OS |
1175 | skb = alloc_can_skb(priv->netdev, &cf); |
1176 | if (!skb) { | |
1177 | stats->tx_dropped++; | |
1178 | return; | |
1179 | } | |
1180 | ||
f5d4abea AD |
1181 | if (dev->family == KVASER_LEAF && msg->id == CMD_LEAF_LOG_MESSAGE) { |
1182 | cf->can_id = le32_to_cpu(msg->u.leaf.log_message.id); | |
a90f13b2 JP |
1183 | if (cf->can_id & KVASER_EXTENDED_FRAME) |
1184 | cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG; | |
1185 | else | |
1186 | cf->can_id &= CAN_SFF_MASK; | |
080f40a6 | 1187 | |
f5d4abea | 1188 | cf->can_dlc = get_can_dlc(msg->u.leaf.log_message.dlc); |
a90f13b2 | 1189 | |
f5d4abea | 1190 | if (msg->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME) |
a90f13b2 JP |
1191 | cf->can_id |= CAN_RTR_FLAG; |
1192 | else | |
f5d4abea | 1193 | memcpy(cf->data, &msg->u.leaf.log_message.data, |
a90f13b2 JP |
1194 | cf->can_dlc); |
1195 | } else { | |
f5d4abea | 1196 | cf->can_id = ((rx_msg[0] & 0x1f) << 6) | (rx_msg[1] & 0x3f); |
a90f13b2 JP |
1197 | |
1198 | if (msg->id == CMD_RX_EXT_MESSAGE) { | |
1199 | cf->can_id <<= 18; | |
f5d4abea AD |
1200 | cf->can_id |= ((rx_msg[2] & 0x0f) << 14) | |
1201 | ((rx_msg[3] & 0xff) << 6) | | |
1202 | (rx_msg[4] & 0x3f); | |
a90f13b2 JP |
1203 | cf->can_id |= CAN_EFF_FLAG; |
1204 | } | |
080f40a6 | 1205 | |
f5d4abea | 1206 | cf->can_dlc = get_can_dlc(rx_msg[5]); |
a90f13b2 | 1207 | |
f5d4abea | 1208 | if (msg->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME) |
a90f13b2 JP |
1209 | cf->can_id |= CAN_RTR_FLAG; |
1210 | else | |
f5d4abea | 1211 | memcpy(cf->data, &rx_msg[6], |
a90f13b2 JP |
1212 | cf->can_dlc); |
1213 | } | |
080f40a6 | 1214 | |
080f40a6 OS |
1215 | stats->rx_packets++; |
1216 | stats->rx_bytes += cf->can_dlc; | |
a58518cc | 1217 | netif_rx(skb); |
080f40a6 OS |
1218 | } |
1219 | ||
1220 | static void kvaser_usb_start_chip_reply(const struct kvaser_usb *dev, | |
1221 | const struct kvaser_msg *msg) | |
1222 | { | |
1223 | struct kvaser_usb_net_priv *priv; | |
1224 | u8 channel = msg->u.simple.channel; | |
1225 | ||
1226 | if (channel >= dev->nchannels) { | |
1227 | dev_err(dev->udev->dev.parent, | |
1228 | "Invalid channel number (%d)\n", channel); | |
1229 | return; | |
1230 | } | |
1231 | ||
1232 | priv = dev->nets[channel]; | |
1233 | ||
1234 | if (completion_done(&priv->start_comp) && | |
1235 | netif_queue_stopped(priv->netdev)) { | |
1236 | netif_wake_queue(priv->netdev); | |
1237 | } else { | |
1238 | netif_start_queue(priv->netdev); | |
1239 | complete(&priv->start_comp); | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | static void kvaser_usb_stop_chip_reply(const struct kvaser_usb *dev, | |
1244 | const struct kvaser_msg *msg) | |
1245 | { | |
1246 | struct kvaser_usb_net_priv *priv; | |
1247 | u8 channel = msg->u.simple.channel; | |
1248 | ||
1249 | if (channel >= dev->nchannels) { | |
1250 | dev_err(dev->udev->dev.parent, | |
1251 | "Invalid channel number (%d)\n", channel); | |
1252 | return; | |
1253 | } | |
1254 | ||
1255 | priv = dev->nets[channel]; | |
1256 | ||
1257 | complete(&priv->stop_comp); | |
1258 | } | |
1259 | ||
1260 | static void kvaser_usb_handle_message(const struct kvaser_usb *dev, | |
1261 | const struct kvaser_msg *msg) | |
1262 | { | |
1263 | switch (msg->id) { | |
1264 | case CMD_START_CHIP_REPLY: | |
1265 | kvaser_usb_start_chip_reply(dev, msg); | |
1266 | break; | |
1267 | ||
1268 | case CMD_STOP_CHIP_REPLY: | |
1269 | kvaser_usb_stop_chip_reply(dev, msg); | |
1270 | break; | |
1271 | ||
1272 | case CMD_RX_STD_MESSAGE: | |
1273 | case CMD_RX_EXT_MESSAGE: | |
f5d4abea AD |
1274 | kvaser_usb_rx_can_msg(dev, msg); |
1275 | break; | |
1276 | ||
1277 | case CMD_LEAF_LOG_MESSAGE: | |
1278 | if (dev->family != KVASER_LEAF) | |
1279 | goto warn; | |
080f40a6 OS |
1280 | kvaser_usb_rx_can_msg(dev, msg); |
1281 | break; | |
1282 | ||
1283 | case CMD_CHIP_STATE_EVENT: | |
1284 | case CMD_CAN_ERROR_EVENT: | |
f5d4abea AD |
1285 | if (dev->family == KVASER_LEAF) |
1286 | kvaser_leaf_rx_error(dev, msg); | |
1287 | else | |
1288 | kvaser_usbcan_rx_error(dev, msg); | |
080f40a6 OS |
1289 | break; |
1290 | ||
080f40a6 OS |
1291 | case CMD_TX_ACKNOWLEDGE: |
1292 | kvaser_usb_tx_acknowledge(dev, msg); | |
1293 | break; | |
1294 | ||
f5d4abea AD |
1295 | /* Ignored messages */ |
1296 | case CMD_USBCAN_CLOCK_OVERFLOW_EVENT: | |
1297 | if (dev->family != KVASER_USBCAN) | |
1298 | goto warn; | |
1299 | break; | |
1300 | ||
080f40a6 | 1301 | default: |
f5d4abea | 1302 | warn: dev_warn(dev->udev->dev.parent, |
080f40a6 OS |
1303 | "Unhandled message (%d)\n", msg->id); |
1304 | break; | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | static void kvaser_usb_read_bulk_callback(struct urb *urb) | |
1309 | { | |
1310 | struct kvaser_usb *dev = urb->context; | |
1311 | struct kvaser_msg *msg; | |
1312 | int pos = 0; | |
1313 | int err, i; | |
1314 | ||
1315 | switch (urb->status) { | |
1316 | case 0: | |
1317 | break; | |
1318 | case -ENOENT: | |
1319 | case -ESHUTDOWN: | |
1320 | return; | |
1321 | default: | |
1322 | dev_info(dev->udev->dev.parent, "Rx URB aborted (%d)\n", | |
1323 | urb->status); | |
1324 | goto resubmit_urb; | |
1325 | } | |
1326 | ||
1327 | while (pos <= urb->actual_length - MSG_HEADER_LEN) { | |
1328 | msg = urb->transfer_buffer + pos; | |
1329 | ||
2fec5104 AD |
1330 | /* The Kvaser firmware can only read and write messages that |
1331 | * does not cross the USB's endpoint wMaxPacketSize boundary. | |
1332 | * If a follow-up command crosses such boundary, firmware puts | |
1333 | * a placeholder zero-length command in its place then aligns | |
1334 | * the real command to the next max packet size. | |
1335 | * | |
1336 | * Handle such cases or we're going to miss a significant | |
1337 | * number of events in case of a heavy rx load on the bus. | |
1338 | */ | |
1339 | if (msg->len == 0) { | |
7e184c28 AD |
1340 | pos = round_up(pos, le16_to_cpu(dev->bulk_in-> |
1341 | wMaxPacketSize)); | |
2fec5104 AD |
1342 | continue; |
1343 | } | |
080f40a6 OS |
1344 | |
1345 | if (pos + msg->len > urb->actual_length) { | |
1346 | dev_err(dev->udev->dev.parent, "Format error\n"); | |
1347 | break; | |
1348 | } | |
1349 | ||
1350 | kvaser_usb_handle_message(dev, msg); | |
080f40a6 OS |
1351 | pos += msg->len; |
1352 | } | |
1353 | ||
1354 | resubmit_urb: | |
1355 | usb_fill_bulk_urb(urb, dev->udev, | |
1356 | usb_rcvbulkpipe(dev->udev, | |
1357 | dev->bulk_in->bEndpointAddress), | |
1358 | urb->transfer_buffer, RX_BUFFER_SIZE, | |
1359 | kvaser_usb_read_bulk_callback, dev); | |
1360 | ||
1361 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
1362 | if (err == -ENODEV) { | |
1363 | for (i = 0; i < dev->nchannels; i++) { | |
1364 | if (!dev->nets[i]) | |
1365 | continue; | |
1366 | ||
1367 | netif_device_detach(dev->nets[i]->netdev); | |
1368 | } | |
1369 | } else if (err) { | |
1370 | dev_err(dev->udev->dev.parent, | |
1371 | "Failed resubmitting read bulk urb: %d\n", err); | |
1372 | } | |
1373 | ||
1374 | return; | |
1375 | } | |
1376 | ||
1377 | static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev) | |
1378 | { | |
1379 | int i, err = 0; | |
1380 | ||
1381 | if (dev->rxinitdone) | |
1382 | return 0; | |
1383 | ||
1384 | for (i = 0; i < MAX_RX_URBS; i++) { | |
1385 | struct urb *urb = NULL; | |
1386 | u8 *buf = NULL; | |
1387 | dma_addr_t buf_dma; | |
1388 | ||
1389 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
1390 | if (!urb) { | |
1391 | dev_warn(dev->udev->dev.parent, | |
1392 | "No memory left for URBs\n"); | |
1393 | err = -ENOMEM; | |
1394 | break; | |
1395 | } | |
1396 | ||
1397 | buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE, | |
1398 | GFP_KERNEL, &buf_dma); | |
1399 | if (!buf) { | |
1400 | dev_warn(dev->udev->dev.parent, | |
1401 | "No memory left for USB buffer\n"); | |
1402 | usb_free_urb(urb); | |
1403 | err = -ENOMEM; | |
1404 | break; | |
1405 | } | |
1406 | ||
1407 | usb_fill_bulk_urb(urb, dev->udev, | |
1408 | usb_rcvbulkpipe(dev->udev, | |
1409 | dev->bulk_in->bEndpointAddress), | |
1410 | buf, RX_BUFFER_SIZE, | |
1411 | kvaser_usb_read_bulk_callback, | |
1412 | dev); | |
1413 | urb->transfer_dma = buf_dma; | |
1414 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1415 | usb_anchor_urb(urb, &dev->rx_submitted); | |
1416 | ||
1417 | err = usb_submit_urb(urb, GFP_KERNEL); | |
1418 | if (err) { | |
1419 | usb_unanchor_urb(urb); | |
1420 | usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf, | |
1421 | buf_dma); | |
1422 | usb_free_urb(urb); | |
1423 | break; | |
1424 | } | |
1425 | ||
1426 | dev->rxbuf[i] = buf; | |
1427 | dev->rxbuf_dma[i] = buf_dma; | |
1428 | ||
1429 | usb_free_urb(urb); | |
1430 | } | |
1431 | ||
1432 | if (i == 0) { | |
1433 | dev_warn(dev->udev->dev.parent, | |
1434 | "Cannot setup read URBs, error %d\n", err); | |
1435 | return err; | |
1436 | } else if (i < MAX_RX_URBS) { | |
1437 | dev_warn(dev->udev->dev.parent, | |
1438 | "RX performances may be slow\n"); | |
1439 | } | |
1440 | ||
1441 | dev->rxinitdone = true; | |
1442 | ||
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | static int kvaser_usb_set_opt_mode(const struct kvaser_usb_net_priv *priv) | |
1447 | { | |
1448 | struct kvaser_msg *msg; | |
1449 | int rc; | |
1450 | ||
1451 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); | |
1452 | if (!msg) | |
1453 | return -ENOMEM; | |
1454 | ||
1455 | msg->id = CMD_SET_CTRL_MODE; | |
1456 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_ctrl_mode); | |
1457 | msg->u.ctrl_mode.tid = 0xff; | |
1458 | msg->u.ctrl_mode.channel = priv->channel; | |
1459 | ||
1460 | if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) | |
1461 | msg->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT; | |
1462 | else | |
1463 | msg->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL; | |
1464 | ||
1465 | rc = kvaser_usb_send_msg(priv->dev, msg); | |
1466 | ||
1467 | kfree(msg); | |
1468 | return rc; | |
1469 | } | |
1470 | ||
1471 | static int kvaser_usb_start_chip(struct kvaser_usb_net_priv *priv) | |
1472 | { | |
1473 | int err; | |
1474 | ||
1475 | init_completion(&priv->start_comp); | |
1476 | ||
1477 | err = kvaser_usb_send_simple_msg(priv->dev, CMD_START_CHIP, | |
1478 | priv->channel); | |
1479 | if (err) | |
1480 | return err; | |
1481 | ||
1482 | if (!wait_for_completion_timeout(&priv->start_comp, | |
1483 | msecs_to_jiffies(START_TIMEOUT))) | |
1484 | return -ETIMEDOUT; | |
1485 | ||
1486 | return 0; | |
1487 | } | |
1488 | ||
1489 | static int kvaser_usb_open(struct net_device *netdev) | |
1490 | { | |
1491 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1492 | struct kvaser_usb *dev = priv->dev; | |
1493 | int err; | |
1494 | ||
1495 | err = open_candev(netdev); | |
1496 | if (err) | |
1497 | return err; | |
1498 | ||
1499 | err = kvaser_usb_setup_rx_urbs(dev); | |
1500 | if (err) | |
1501 | goto error; | |
1502 | ||
1503 | err = kvaser_usb_set_opt_mode(priv); | |
1504 | if (err) | |
1505 | goto error; | |
1506 | ||
1507 | err = kvaser_usb_start_chip(priv); | |
1508 | if (err) { | |
1509 | netdev_warn(netdev, "Cannot start device, error %d\n", err); | |
1510 | goto error; | |
1511 | } | |
1512 | ||
1513 | priv->can.state = CAN_STATE_ERROR_ACTIVE; | |
1514 | ||
1515 | return 0; | |
1516 | ||
1517 | error: | |
1518 | close_candev(netdev); | |
1519 | return err; | |
1520 | } | |
1521 | ||
a9dc960c AD |
1522 | static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv) |
1523 | { | |
082d70b6 AD |
1524 | int i, max_tx_urbs; |
1525 | ||
1526 | max_tx_urbs = priv->dev->max_tx_urbs; | |
a9dc960c AD |
1527 | |
1528 | priv->active_tx_contexts = 0; | |
082d70b6 AD |
1529 | for (i = 0; i < max_tx_urbs; i++) |
1530 | priv->tx_contexts[i].echo_index = max_tx_urbs; | |
a9dc960c AD |
1531 | } |
1532 | ||
1533 | /* This method might sleep. Do not call it in the atomic context | |
1534 | * of URB completions. | |
1535 | */ | |
1536 | static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv) | |
1537 | { | |
1538 | usb_kill_anchored_urbs(&priv->tx_submitted); | |
1539 | kvaser_usb_reset_tx_urb_contexts(priv); | |
1540 | } | |
1541 | ||
080f40a6 OS |
1542 | static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev) |
1543 | { | |
1544 | int i; | |
1545 | ||
1546 | usb_kill_anchored_urbs(&dev->rx_submitted); | |
1547 | ||
1548 | for (i = 0; i < MAX_RX_URBS; i++) | |
1549 | usb_free_coherent(dev->udev, RX_BUFFER_SIZE, | |
1550 | dev->rxbuf[i], | |
1551 | dev->rxbuf_dma[i]); | |
1552 | ||
f5d4abea | 1553 | for (i = 0; i < dev->nchannels; i++) { |
080f40a6 OS |
1554 | struct kvaser_usb_net_priv *priv = dev->nets[i]; |
1555 | ||
1556 | if (priv) | |
1557 | kvaser_usb_unlink_tx_urbs(priv); | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | static int kvaser_usb_stop_chip(struct kvaser_usb_net_priv *priv) | |
1562 | { | |
1563 | int err; | |
1564 | ||
1565 | init_completion(&priv->stop_comp); | |
1566 | ||
1567 | err = kvaser_usb_send_simple_msg(priv->dev, CMD_STOP_CHIP, | |
1568 | priv->channel); | |
1569 | if (err) | |
1570 | return err; | |
1571 | ||
1572 | if (!wait_for_completion_timeout(&priv->stop_comp, | |
1573 | msecs_to_jiffies(STOP_TIMEOUT))) | |
1574 | return -ETIMEDOUT; | |
1575 | ||
1576 | return 0; | |
1577 | } | |
1578 | ||
1579 | static int kvaser_usb_flush_queue(struct kvaser_usb_net_priv *priv) | |
1580 | { | |
1581 | struct kvaser_msg *msg; | |
1582 | int rc; | |
1583 | ||
1584 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); | |
1585 | if (!msg) | |
1586 | return -ENOMEM; | |
1587 | ||
1588 | msg->id = CMD_FLUSH_QUEUE; | |
1589 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_flush_queue); | |
1590 | msg->u.flush_queue.channel = priv->channel; | |
1591 | msg->u.flush_queue.flags = 0x00; | |
1592 | ||
1593 | rc = kvaser_usb_send_msg(priv->dev, msg); | |
1594 | ||
1595 | kfree(msg); | |
1596 | return rc; | |
1597 | } | |
1598 | ||
1599 | static int kvaser_usb_close(struct net_device *netdev) | |
1600 | { | |
1601 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1602 | struct kvaser_usb *dev = priv->dev; | |
1603 | int err; | |
1604 | ||
1605 | netif_stop_queue(netdev); | |
1606 | ||
1607 | err = kvaser_usb_flush_queue(priv); | |
1608 | if (err) | |
1609 | netdev_warn(netdev, "Cannot flush queue, error %d\n", err); | |
1610 | ||
1611 | if (kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, priv->channel)) | |
1612 | netdev_warn(netdev, "Cannot reset card, error %d\n", err); | |
1613 | ||
1614 | err = kvaser_usb_stop_chip(priv); | |
1615 | if (err) | |
1616 | netdev_warn(netdev, "Cannot stop device, error %d\n", err); | |
1617 | ||
889b77f7 AD |
1618 | /* reset tx contexts */ |
1619 | kvaser_usb_unlink_tx_urbs(priv); | |
1620 | ||
080f40a6 OS |
1621 | priv->can.state = CAN_STATE_STOPPED; |
1622 | close_candev(priv->netdev); | |
1623 | ||
1624 | return 0; | |
1625 | } | |
1626 | ||
1627 | static void kvaser_usb_write_bulk_callback(struct urb *urb) | |
1628 | { | |
1629 | struct kvaser_usb_tx_urb_context *context = urb->context; | |
1630 | struct kvaser_usb_net_priv *priv; | |
1631 | struct net_device *netdev; | |
1632 | ||
1633 | if (WARN_ON(!context)) | |
1634 | return; | |
1635 | ||
1636 | priv = context->priv; | |
1637 | netdev = priv->netdev; | |
1638 | ||
1639 | kfree(urb->transfer_buffer); | |
1640 | ||
1641 | if (!netif_device_present(netdev)) | |
1642 | return; | |
1643 | ||
1644 | if (urb->status) | |
1645 | netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status); | |
1646 | } | |
1647 | ||
1648 | static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb, | |
1649 | struct net_device *netdev) | |
1650 | { | |
1651 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1652 | struct kvaser_usb *dev = priv->dev; | |
1653 | struct net_device_stats *stats = &netdev->stats; | |
1654 | struct can_frame *cf = (struct can_frame *)skb->data; | |
1655 | struct kvaser_usb_tx_urb_context *context = NULL; | |
1656 | struct urb *urb; | |
1657 | void *buf; | |
1658 | struct kvaser_msg *msg; | |
deb2701c | 1659 | int i, err, ret = NETDEV_TX_OK; |
f5d4abea | 1660 | u8 *msg_tx_can_flags = NULL; /* GCC */ |
a9dc960c | 1661 | unsigned long flags; |
080f40a6 OS |
1662 | |
1663 | if (can_dropped_invalid_skb(netdev, skb)) | |
1664 | return NETDEV_TX_OK; | |
1665 | ||
1666 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
1667 | if (!urb) { | |
1668 | netdev_err(netdev, "No memory left for URBs\n"); | |
1669 | stats->tx_dropped++; | |
b442723f AD |
1670 | dev_kfree_skb(skb); |
1671 | return NETDEV_TX_OK; | |
080f40a6 OS |
1672 | } |
1673 | ||
1674 | buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC); | |
1675 | if (!buf) { | |
080f40a6 | 1676 | stats->tx_dropped++; |
b442723f | 1677 | dev_kfree_skb(skb); |
deb2701c | 1678 | goto freeurb; |
080f40a6 OS |
1679 | } |
1680 | ||
1681 | msg = buf; | |
1682 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_tx_can); | |
080f40a6 OS |
1683 | msg->u.tx_can.channel = priv->channel; |
1684 | ||
f5d4abea AD |
1685 | switch (dev->family) { |
1686 | case KVASER_LEAF: | |
1687 | msg_tx_can_flags = &msg->u.tx_can.leaf.flags; | |
1688 | break; | |
1689 | case KVASER_USBCAN: | |
1690 | msg_tx_can_flags = &msg->u.tx_can.usbcan.flags; | |
1691 | break; | |
1692 | } | |
1693 | ||
1694 | *msg_tx_can_flags = 0; | |
1695 | ||
080f40a6 OS |
1696 | if (cf->can_id & CAN_EFF_FLAG) { |
1697 | msg->id = CMD_TX_EXT_MESSAGE; | |
1698 | msg->u.tx_can.msg[0] = (cf->can_id >> 24) & 0x1f; | |
1699 | msg->u.tx_can.msg[1] = (cf->can_id >> 18) & 0x3f; | |
1700 | msg->u.tx_can.msg[2] = (cf->can_id >> 14) & 0x0f; | |
1701 | msg->u.tx_can.msg[3] = (cf->can_id >> 6) & 0xff; | |
1702 | msg->u.tx_can.msg[4] = cf->can_id & 0x3f; | |
1703 | } else { | |
1704 | msg->id = CMD_TX_STD_MESSAGE; | |
1705 | msg->u.tx_can.msg[0] = (cf->can_id >> 6) & 0x1f; | |
1706 | msg->u.tx_can.msg[1] = cf->can_id & 0x3f; | |
1707 | } | |
1708 | ||
1709 | msg->u.tx_can.msg[5] = cf->can_dlc; | |
1710 | memcpy(&msg->u.tx_can.msg[6], cf->data, cf->can_dlc); | |
1711 | ||
1712 | if (cf->can_id & CAN_RTR_FLAG) | |
f5d4abea | 1713 | *msg_tx_can_flags |= MSG_FLAG_REMOTE_FRAME; |
080f40a6 | 1714 | |
a9dc960c | 1715 | spin_lock_irqsave(&priv->tx_contexts_lock, flags); |
082d70b6 AD |
1716 | for (i = 0; i < dev->max_tx_urbs; i++) { |
1717 | if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) { | |
080f40a6 | 1718 | context = &priv->tx_contexts[i]; |
a9dc960c AD |
1719 | |
1720 | context->echo_index = i; | |
1721 | can_put_echo_skb(skb, netdev, context->echo_index); | |
1722 | ++priv->active_tx_contexts; | |
082d70b6 | 1723 | if (priv->active_tx_contexts >= dev->max_tx_urbs) |
a9dc960c AD |
1724 | netif_stop_queue(netdev); |
1725 | ||
080f40a6 OS |
1726 | break; |
1727 | } | |
1728 | } | |
a9dc960c | 1729 | spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); |
080f40a6 | 1730 | |
b442723f | 1731 | /* This should never happen; it implies a flow control bug */ |
080f40a6 OS |
1732 | if (!context) { |
1733 | netdev_warn(netdev, "cannot find free context\n"); | |
deb2701c AD |
1734 | |
1735 | kfree(buf); | |
080f40a6 | 1736 | ret = NETDEV_TX_BUSY; |
deb2701c | 1737 | goto freeurb; |
080f40a6 OS |
1738 | } |
1739 | ||
1740 | context->priv = priv; | |
080f40a6 OS |
1741 | context->dlc = cf->can_dlc; |
1742 | ||
1743 | msg->u.tx_can.tid = context->echo_index; | |
1744 | ||
1745 | usb_fill_bulk_urb(urb, dev->udev, | |
1746 | usb_sndbulkpipe(dev->udev, | |
1747 | dev->bulk_out->bEndpointAddress), | |
1748 | buf, msg->len, | |
1749 | kvaser_usb_write_bulk_callback, context); | |
1750 | usb_anchor_urb(urb, &priv->tx_submitted); | |
1751 | ||
080f40a6 OS |
1752 | err = usb_submit_urb(urb, GFP_ATOMIC); |
1753 | if (unlikely(err)) { | |
a9dc960c AD |
1754 | spin_lock_irqsave(&priv->tx_contexts_lock, flags); |
1755 | ||
080f40a6 | 1756 | can_free_echo_skb(netdev, context->echo_index); |
082d70b6 | 1757 | context->echo_index = dev->max_tx_urbs; |
a9dc960c AD |
1758 | --priv->active_tx_contexts; |
1759 | netif_wake_queue(netdev); | |
1760 | ||
1761 | spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); | |
080f40a6 | 1762 | |
080f40a6 OS |
1763 | usb_unanchor_urb(urb); |
1764 | ||
1765 | stats->tx_dropped++; | |
1766 | ||
1767 | if (err == -ENODEV) | |
1768 | netif_device_detach(netdev); | |
1769 | else | |
1770 | netdev_warn(netdev, "Failed tx_urb %d\n", err); | |
1771 | ||
deb2701c | 1772 | goto freeurb; |
080f40a6 OS |
1773 | } |
1774 | ||
deb2701c | 1775 | ret = NETDEV_TX_OK; |
080f40a6 | 1776 | |
deb2701c | 1777 | freeurb: |
080f40a6 | 1778 | usb_free_urb(urb); |
080f40a6 OS |
1779 | return ret; |
1780 | } | |
1781 | ||
1782 | static const struct net_device_ops kvaser_usb_netdev_ops = { | |
1783 | .ndo_open = kvaser_usb_open, | |
1784 | .ndo_stop = kvaser_usb_close, | |
1785 | .ndo_start_xmit = kvaser_usb_start_xmit, | |
c971fa2a | 1786 | .ndo_change_mtu = can_change_mtu, |
080f40a6 OS |
1787 | }; |
1788 | ||
1789 | static const struct can_bittiming_const kvaser_usb_bittiming_const = { | |
1790 | .name = "kvaser_usb", | |
1791 | .tseg1_min = KVASER_USB_TSEG1_MIN, | |
1792 | .tseg1_max = KVASER_USB_TSEG1_MAX, | |
1793 | .tseg2_min = KVASER_USB_TSEG2_MIN, | |
1794 | .tseg2_max = KVASER_USB_TSEG2_MAX, | |
1795 | .sjw_max = KVASER_USB_SJW_MAX, | |
1796 | .brp_min = KVASER_USB_BRP_MIN, | |
1797 | .brp_max = KVASER_USB_BRP_MAX, | |
1798 | .brp_inc = KVASER_USB_BRP_INC, | |
1799 | }; | |
1800 | ||
1801 | static int kvaser_usb_set_bittiming(struct net_device *netdev) | |
1802 | { | |
1803 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1804 | struct can_bittiming *bt = &priv->can.bittiming; | |
1805 | struct kvaser_usb *dev = priv->dev; | |
1806 | struct kvaser_msg *msg; | |
1807 | int rc; | |
1808 | ||
1809 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); | |
1810 | if (!msg) | |
1811 | return -ENOMEM; | |
1812 | ||
1813 | msg->id = CMD_SET_BUS_PARAMS; | |
1814 | msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_busparams); | |
1815 | msg->u.busparams.channel = priv->channel; | |
1816 | msg->u.busparams.tid = 0xff; | |
1817 | msg->u.busparams.bitrate = cpu_to_le32(bt->bitrate); | |
1818 | msg->u.busparams.sjw = bt->sjw; | |
1819 | msg->u.busparams.tseg1 = bt->prop_seg + bt->phase_seg1; | |
1820 | msg->u.busparams.tseg2 = bt->phase_seg2; | |
1821 | ||
1822 | if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) | |
1823 | msg->u.busparams.no_samp = 3; | |
1824 | else | |
1825 | msg->u.busparams.no_samp = 1; | |
1826 | ||
1827 | rc = kvaser_usb_send_msg(dev, msg); | |
1828 | ||
1829 | kfree(msg); | |
1830 | return rc; | |
1831 | } | |
1832 | ||
1833 | static int kvaser_usb_set_mode(struct net_device *netdev, | |
1834 | enum can_mode mode) | |
1835 | { | |
1836 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1837 | int err; | |
1838 | ||
1839 | switch (mode) { | |
1840 | case CAN_MODE_START: | |
1841 | err = kvaser_usb_simple_msg_async(priv, CMD_START_CHIP); | |
1842 | if (err) | |
1843 | return err; | |
1844 | break; | |
1845 | default: | |
1846 | return -EOPNOTSUPP; | |
1847 | } | |
1848 | ||
1849 | return 0; | |
1850 | } | |
1851 | ||
1852 | static int kvaser_usb_get_berr_counter(const struct net_device *netdev, | |
1853 | struct can_berr_counter *bec) | |
1854 | { | |
1855 | struct kvaser_usb_net_priv *priv = netdev_priv(netdev); | |
1856 | ||
1857 | *bec = priv->bec; | |
1858 | ||
1859 | return 0; | |
1860 | } | |
1861 | ||
1862 | static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev) | |
1863 | { | |
1864 | int i; | |
1865 | ||
1866 | for (i = 0; i < dev->nchannels; i++) { | |
1867 | if (!dev->nets[i]) | |
1868 | continue; | |
1869 | ||
c637aab0 | 1870 | unregister_candev(dev->nets[i]->netdev); |
080f40a6 OS |
1871 | } |
1872 | ||
1873 | kvaser_usb_unlink_all_urbs(dev); | |
1874 | ||
1875 | for (i = 0; i < dev->nchannels; i++) { | |
1876 | if (!dev->nets[i]) | |
1877 | continue; | |
1878 | ||
1879 | free_candev(dev->nets[i]->netdev); | |
1880 | } | |
1881 | } | |
1882 | ||
1883 | static int kvaser_usb_init_one(struct usb_interface *intf, | |
1884 | const struct usb_device_id *id, int channel) | |
1885 | { | |
1886 | struct kvaser_usb *dev = usb_get_intfdata(intf); | |
1887 | struct net_device *netdev; | |
1888 | struct kvaser_usb_net_priv *priv; | |
a9dc960c | 1889 | int err; |
080f40a6 | 1890 | |
5e7e6e0c AD |
1891 | err = kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, channel); |
1892 | if (err) | |
1893 | return err; | |
1894 | ||
082d70b6 AD |
1895 | netdev = alloc_candev(sizeof(*priv) + |
1896 | dev->max_tx_urbs * sizeof(*priv->tx_contexts), | |
1897 | dev->max_tx_urbs); | |
080f40a6 OS |
1898 | if (!netdev) { |
1899 | dev_err(&intf->dev, "Cannot alloc candev\n"); | |
1900 | return -ENOMEM; | |
1901 | } | |
1902 | ||
1903 | priv = netdev_priv(netdev); | |
1904 | ||
a9dc960c | 1905 | init_usb_anchor(&priv->tx_submitted); |
080f40a6 OS |
1906 | init_completion(&priv->start_comp); |
1907 | init_completion(&priv->stop_comp); | |
1908 | ||
080f40a6 OS |
1909 | priv->dev = dev; |
1910 | priv->netdev = netdev; | |
1911 | priv->channel = channel; | |
1912 | ||
a9dc960c AD |
1913 | spin_lock_init(&priv->tx_contexts_lock); |
1914 | kvaser_usb_reset_tx_urb_contexts(priv); | |
1915 | ||
080f40a6 OS |
1916 | priv->can.state = CAN_STATE_STOPPED; |
1917 | priv->can.clock.freq = CAN_USB_CLOCK; | |
1918 | priv->can.bittiming_const = &kvaser_usb_bittiming_const; | |
1919 | priv->can.do_set_bittiming = kvaser_usb_set_bittiming; | |
1920 | priv->can.do_set_mode = kvaser_usb_set_mode; | |
1921 | if (id->driver_info & KVASER_HAS_TXRX_ERRORS) | |
1922 | priv->can.do_get_berr_counter = kvaser_usb_get_berr_counter; | |
1923 | priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES; | |
1924 | if (id->driver_info & KVASER_HAS_SILENT_MODE) | |
1925 | priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; | |
1926 | ||
1927 | netdev->flags |= IFF_ECHO; | |
1928 | ||
1929 | netdev->netdev_ops = &kvaser_usb_netdev_ops; | |
1930 | ||
1931 | SET_NETDEV_DEV(netdev, &intf->dev); | |
3e66d013 | 1932 | netdev->dev_id = channel; |
080f40a6 OS |
1933 | |
1934 | dev->nets[channel] = priv; | |
1935 | ||
1936 | err = register_candev(netdev); | |
1937 | if (err) { | |
1938 | dev_err(&intf->dev, "Failed to register can device\n"); | |
1939 | free_candev(netdev); | |
1940 | dev->nets[channel] = NULL; | |
1941 | return err; | |
1942 | } | |
1943 | ||
1944 | netdev_dbg(netdev, "device registered\n"); | |
1945 | ||
1946 | return 0; | |
1947 | } | |
1948 | ||
896e23bd OS |
1949 | static int kvaser_usb_get_endpoints(const struct usb_interface *intf, |
1950 | struct usb_endpoint_descriptor **in, | |
1951 | struct usb_endpoint_descriptor **out) | |
080f40a6 OS |
1952 | { |
1953 | const struct usb_host_interface *iface_desc; | |
1954 | struct usb_endpoint_descriptor *endpoint; | |
1955 | int i; | |
1956 | ||
1957 | iface_desc = &intf->altsetting[0]; | |
1958 | ||
1959 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
1960 | endpoint = &iface_desc->endpoint[i].desc; | |
1961 | ||
896e23bd | 1962 | if (!*in && usb_endpoint_is_bulk_in(endpoint)) |
080f40a6 OS |
1963 | *in = endpoint; |
1964 | ||
896e23bd | 1965 | if (!*out && usb_endpoint_is_bulk_out(endpoint)) |
080f40a6 | 1966 | *out = endpoint; |
896e23bd OS |
1967 | |
1968 | /* use first bulk endpoint for in and out */ | |
1969 | if (*in && *out) | |
1970 | return 0; | |
080f40a6 | 1971 | } |
896e23bd OS |
1972 | |
1973 | return -ENODEV; | |
080f40a6 OS |
1974 | } |
1975 | ||
1976 | static int kvaser_usb_probe(struct usb_interface *intf, | |
1977 | const struct usb_device_id *id) | |
1978 | { | |
1979 | struct kvaser_usb *dev; | |
1980 | int err = -ENOMEM; | |
14c10c2a | 1981 | int i, retry = 3; |
080f40a6 OS |
1982 | |
1983 | dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL); | |
1984 | if (!dev) | |
1985 | return -ENOMEM; | |
1986 | ||
f5d4abea AD |
1987 | if (kvaser_is_leaf(id)) { |
1988 | dev->family = KVASER_LEAF; | |
1989 | } else if (kvaser_is_usbcan(id)) { | |
1990 | dev->family = KVASER_USBCAN; | |
1991 | } else { | |
1992 | dev_err(&intf->dev, | |
1993 | "Product ID (%d) does not belong to any known Kvaser USB family", | |
1994 | id->idProduct); | |
1995 | return -ENODEV; | |
1996 | } | |
1997 | ||
896e23bd OS |
1998 | err = kvaser_usb_get_endpoints(intf, &dev->bulk_in, &dev->bulk_out); |
1999 | if (err) { | |
080f40a6 OS |
2000 | dev_err(&intf->dev, "Cannot get usb endpoint(s)"); |
2001 | return err; | |
2002 | } | |
2003 | ||
2004 | dev->udev = interface_to_usbdev(intf); | |
2005 | ||
2006 | init_usb_anchor(&dev->rx_submitted); | |
2007 | ||
2008 | usb_set_intfdata(intf, dev); | |
2009 | ||
14c10c2a AD |
2010 | /* On some x86 laptops, plugging a Kvaser device again after |
2011 | * an unplug makes the firmware always ignore the very first | |
2012 | * command. For such a case, provide some room for retries | |
2013 | * instead of completely exiting the driver. | |
2014 | */ | |
2015 | do { | |
2016 | err = kvaser_usb_get_software_info(dev); | |
2017 | } while (--retry && err == -ETIMEDOUT); | |
2018 | ||
080f40a6 OS |
2019 | if (err) { |
2020 | dev_err(&intf->dev, | |
2021 | "Cannot get software infos, error %d\n", err); | |
2022 | return err; | |
2023 | } | |
2024 | ||
082d70b6 AD |
2025 | dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n", |
2026 | ((dev->fw_version >> 24) & 0xff), | |
2027 | ((dev->fw_version >> 16) & 0xff), | |
2028 | (dev->fw_version & 0xffff)); | |
2029 | ||
2030 | dev_dbg(&intf->dev, "Max oustanding tx = %d URBs\n", dev->max_tx_urbs); | |
2031 | ||
080f40a6 OS |
2032 | err = kvaser_usb_get_card_info(dev); |
2033 | if (err) { | |
2034 | dev_err(&intf->dev, | |
2035 | "Cannot get card infos, error %d\n", err); | |
2036 | return err; | |
2037 | } | |
2038 | ||
080f40a6 OS |
2039 | for (i = 0; i < dev->nchannels; i++) { |
2040 | err = kvaser_usb_init_one(intf, id, i); | |
2041 | if (err) { | |
2042 | kvaser_usb_remove_interfaces(dev); | |
2043 | return err; | |
2044 | } | |
2045 | } | |
2046 | ||
2047 | return 0; | |
2048 | } | |
2049 | ||
2050 | static void kvaser_usb_disconnect(struct usb_interface *intf) | |
2051 | { | |
2052 | struct kvaser_usb *dev = usb_get_intfdata(intf); | |
2053 | ||
2054 | usb_set_intfdata(intf, NULL); | |
2055 | ||
2056 | if (!dev) | |
2057 | return; | |
2058 | ||
2059 | kvaser_usb_remove_interfaces(dev); | |
2060 | } | |
2061 | ||
2062 | static struct usb_driver kvaser_usb_driver = { | |
2063 | .name = "kvaser_usb", | |
2064 | .probe = kvaser_usb_probe, | |
2065 | .disconnect = kvaser_usb_disconnect, | |
2066 | .id_table = kvaser_usb_table, | |
2067 | }; | |
2068 | ||
2069 | module_usb_driver(kvaser_usb_driver); | |
2070 | ||
2071 | MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>"); | |
2072 | MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices"); | |
2073 | MODULE_LICENSE("GPL v2"); |