Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 1 | /* |
| 2 | * CAN driver for PEAK System PCAN-USB Pro adapter |
| 3 | * Derived from the PCAN project file driver/src/pcan_usbpro.c |
| 4 | * |
| 5 | * Copyright (C) 2003-2011 PEAK System-Technik GmbH |
| 6 | * Copyright (C) 2011-2012 Stephane Grosjean <s.grosjean@peak-system.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published |
| 10 | * by the Free Software Foundation; version 2 of the License. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, but |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | */ |
| 17 | #include <linux/netdevice.h> |
| 18 | #include <linux/usb.h> |
| 19 | #include <linux/module.h> |
| 20 | |
| 21 | #include <linux/can.h> |
| 22 | #include <linux/can/dev.h> |
| 23 | #include <linux/can/error.h> |
| 24 | |
| 25 | #include "pcan_usb_core.h" |
| 26 | #include "pcan_usb_pro.h" |
| 27 | |
| 28 | MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro adapter"); |
| 29 | |
| 30 | /* PCAN-USB Pro Endpoints */ |
| 31 | #define PCAN_USBPRO_EP_CMDOUT 1 |
| 32 | #define PCAN_USBPRO_EP_CMDIN (PCAN_USBPRO_EP_CMDOUT | USB_DIR_IN) |
| 33 | #define PCAN_USBPRO_EP_MSGOUT_0 2 |
| 34 | #define PCAN_USBPRO_EP_MSGIN (PCAN_USBPRO_EP_MSGOUT_0 | USB_DIR_IN) |
| 35 | #define PCAN_USBPRO_EP_MSGOUT_1 3 |
| 36 | #define PCAN_USBPRO_EP_UNUSED (PCAN_USBPRO_EP_MSGOUT_1 | USB_DIR_IN) |
| 37 | |
| 38 | #define PCAN_USBPRO_CHANNEL_COUNT 2 |
| 39 | |
| 40 | /* PCAN-USB Pro adapter internal clock (MHz) */ |
| 41 | #define PCAN_USBPRO_CRYSTAL_HZ 56000000 |
| 42 | |
| 43 | /* PCAN-USB Pro command timeout (ms.) */ |
| 44 | #define PCAN_USBPRO_COMMAND_TIMEOUT 1000 |
| 45 | |
| 46 | /* PCAN-USB Pro rx/tx buffers size */ |
| 47 | #define PCAN_USBPRO_RX_BUFFER_SIZE 1024 |
| 48 | #define PCAN_USBPRO_TX_BUFFER_SIZE 64 |
| 49 | |
| 50 | #define PCAN_USBPRO_MSG_HEADER_LEN 4 |
| 51 | |
| 52 | /* some commands responses need to be re-submitted */ |
| 53 | #define PCAN_USBPRO_RSP_SUBMIT_MAX 2 |
| 54 | |
| 55 | #define PCAN_USBPRO_RTR 0x01 |
| 56 | #define PCAN_USBPRO_EXT 0x02 |
| 57 | |
| 58 | #define PCAN_USBPRO_CMD_BUFFER_SIZE 512 |
| 59 | |
| 60 | /* handle device specific info used by the netdevices */ |
| 61 | struct pcan_usb_pro_interface { |
| 62 | struct peak_usb_device *dev[PCAN_USBPRO_CHANNEL_COUNT]; |
| 63 | struct peak_time_ref time_ref; |
| 64 | int cm_ignore_count; |
| 65 | int dev_opened_count; |
| 66 | }; |
| 67 | |
| 68 | /* device information */ |
| 69 | struct pcan_usb_pro_device { |
| 70 | struct peak_usb_device dev; |
| 71 | struct pcan_usb_pro_interface *usb_if; |
| 72 | u32 cached_ccbt; |
| 73 | }; |
| 74 | |
| 75 | /* internal structure used to handle messages sent to bulk urb */ |
| 76 | struct pcan_usb_pro_msg { |
| 77 | u8 *rec_ptr; |
| 78 | int rec_buffer_size; |
| 79 | int rec_buffer_len; |
| 80 | union { |
| 81 | u16 *rec_cnt_rd; |
| 82 | u32 *rec_cnt; |
| 83 | u8 *rec_buffer; |
| 84 | } u; |
| 85 | }; |
| 86 | |
| 87 | /* records sizes table indexed on message id. (8-bits value) */ |
| 88 | static u16 pcan_usb_pro_sizeof_rec[256] = { |
| 89 | [PCAN_USBPRO_SETBTR] = sizeof(struct pcan_usb_pro_btr), |
| 90 | [PCAN_USBPRO_SETBUSACT] = sizeof(struct pcan_usb_pro_busact), |
| 91 | [PCAN_USBPRO_SETSILENT] = sizeof(struct pcan_usb_pro_silent), |
| 92 | [PCAN_USBPRO_SETFILTR] = sizeof(struct pcan_usb_pro_filter), |
| 93 | [PCAN_USBPRO_SETTS] = sizeof(struct pcan_usb_pro_setts), |
| 94 | [PCAN_USBPRO_GETDEVID] = sizeof(struct pcan_usb_pro_devid), |
| 95 | [PCAN_USBPRO_SETLED] = sizeof(struct pcan_usb_pro_setled), |
| 96 | [PCAN_USBPRO_RXMSG8] = sizeof(struct pcan_usb_pro_rxmsg), |
| 97 | [PCAN_USBPRO_RXMSG4] = sizeof(struct pcan_usb_pro_rxmsg) - 4, |
| 98 | [PCAN_USBPRO_RXMSG0] = sizeof(struct pcan_usb_pro_rxmsg) - 8, |
| 99 | [PCAN_USBPRO_RXRTR] = sizeof(struct pcan_usb_pro_rxmsg) - 8, |
| 100 | [PCAN_USBPRO_RXSTATUS] = sizeof(struct pcan_usb_pro_rxstatus), |
| 101 | [PCAN_USBPRO_RXTS] = sizeof(struct pcan_usb_pro_rxts), |
| 102 | [PCAN_USBPRO_TXMSG8] = sizeof(struct pcan_usb_pro_txmsg), |
| 103 | [PCAN_USBPRO_TXMSG4] = sizeof(struct pcan_usb_pro_txmsg) - 4, |
| 104 | [PCAN_USBPRO_TXMSG0] = sizeof(struct pcan_usb_pro_txmsg) - 8, |
| 105 | }; |
| 106 | |
| 107 | /* |
| 108 | * initialize PCAN-USB Pro message data structure |
| 109 | */ |
| 110 | static u8 *pcan_msg_init(struct pcan_usb_pro_msg *pm, void *buffer_addr, |
| 111 | int buffer_size) |
| 112 | { |
| 113 | if (buffer_size < PCAN_USBPRO_MSG_HEADER_LEN) |
| 114 | return NULL; |
| 115 | |
| 116 | pm->u.rec_buffer = (u8 *)buffer_addr; |
| 117 | pm->rec_buffer_size = pm->rec_buffer_len = buffer_size; |
| 118 | pm->rec_ptr = pm->u.rec_buffer + PCAN_USBPRO_MSG_HEADER_LEN; |
| 119 | |
| 120 | return pm->rec_ptr; |
| 121 | } |
| 122 | |
| 123 | static u8 *pcan_msg_init_empty(struct pcan_usb_pro_msg *pm, |
| 124 | void *buffer_addr, int buffer_size) |
| 125 | { |
| 126 | u8 *pr = pcan_msg_init(pm, buffer_addr, buffer_size); |
| 127 | |
| 128 | if (pr) { |
| 129 | pm->rec_buffer_len = PCAN_USBPRO_MSG_HEADER_LEN; |
| 130 | *pm->u.rec_cnt = 0; |
| 131 | } |
| 132 | return pr; |
| 133 | } |
| 134 | |
| 135 | /* |
| 136 | * add one record to a message being built |
| 137 | */ |
| 138 | static int pcan_msg_add_rec(struct pcan_usb_pro_msg *pm, u8 id, ...) |
| 139 | { |
| 140 | int len, i; |
| 141 | u8 *pc; |
| 142 | va_list ap; |
| 143 | |
| 144 | va_start(ap, id); |
| 145 | |
| 146 | pc = pm->rec_ptr + 1; |
| 147 | |
| 148 | i = 0; |
| 149 | switch (id) { |
| 150 | case PCAN_USBPRO_TXMSG8: |
| 151 | i += 4; |
| 152 | case PCAN_USBPRO_TXMSG4: |
| 153 | i += 4; |
| 154 | case PCAN_USBPRO_TXMSG0: |
| 155 | *pc++ = va_arg(ap, int); |
| 156 | *pc++ = va_arg(ap, int); |
| 157 | *pc++ = va_arg(ap, int); |
| 158 | *(u32 *)pc = cpu_to_le32(va_arg(ap, u32)); |
| 159 | pc += 4; |
| 160 | memcpy(pc, va_arg(ap, int *), i); |
| 161 | pc += i; |
| 162 | break; |
| 163 | |
| 164 | case PCAN_USBPRO_SETBTR: |
| 165 | case PCAN_USBPRO_GETDEVID: |
| 166 | *pc++ = va_arg(ap, int); |
| 167 | pc += 2; |
| 168 | *(u32 *)pc = cpu_to_le32(va_arg(ap, u32)); |
| 169 | pc += 4; |
| 170 | break; |
| 171 | |
| 172 | case PCAN_USBPRO_SETFILTR: |
| 173 | case PCAN_USBPRO_SETBUSACT: |
| 174 | case PCAN_USBPRO_SETSILENT: |
| 175 | *pc++ = va_arg(ap, int); |
| 176 | *(u16 *)pc = cpu_to_le16(va_arg(ap, int)); |
| 177 | pc += 2; |
| 178 | break; |
| 179 | |
| 180 | case PCAN_USBPRO_SETLED: |
| 181 | *pc++ = va_arg(ap, int); |
| 182 | *(u16 *)pc = cpu_to_le16(va_arg(ap, int)); |
| 183 | pc += 2; |
| 184 | *(u32 *)pc = cpu_to_le32(va_arg(ap, u32)); |
| 185 | pc += 4; |
| 186 | break; |
| 187 | |
| 188 | case PCAN_USBPRO_SETTS: |
| 189 | pc++; |
| 190 | *(u16 *)pc = cpu_to_le16(va_arg(ap, int)); |
| 191 | pc += 2; |
| 192 | break; |
| 193 | |
| 194 | default: |
| 195 | pr_err("%s: %s(): unknown data type %02Xh (%d)\n", |
| 196 | PCAN_USB_DRIVER_NAME, __func__, id, id); |
| 197 | pc--; |
| 198 | break; |
| 199 | } |
| 200 | |
| 201 | len = pc - pm->rec_ptr; |
| 202 | if (len > 0) { |
| 203 | *pm->u.rec_cnt = cpu_to_le32(*pm->u.rec_cnt+1); |
| 204 | *pm->rec_ptr = id; |
| 205 | |
| 206 | pm->rec_ptr = pc; |
| 207 | pm->rec_buffer_len += len; |
| 208 | } |
| 209 | |
| 210 | va_end(ap); |
| 211 | |
| 212 | return len; |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * send PCAN-USB Pro command synchronously |
| 217 | */ |
| 218 | static int pcan_usb_pro_send_cmd(struct peak_usb_device *dev, |
| 219 | struct pcan_usb_pro_msg *pum) |
| 220 | { |
| 221 | int actual_length; |
| 222 | int err; |
| 223 | |
| 224 | /* usb device unregistered? */ |
| 225 | if (!(dev->state & PCAN_USB_STATE_CONNECTED)) |
| 226 | return 0; |
| 227 | |
| 228 | err = usb_bulk_msg(dev->udev, |
| 229 | usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT), |
| 230 | pum->u.rec_buffer, pum->rec_buffer_len, |
| 231 | &actual_length, PCAN_USBPRO_COMMAND_TIMEOUT); |
| 232 | if (err) |
| 233 | netdev_err(dev->netdev, "sending command failure: %d\n", err); |
| 234 | |
| 235 | return err; |
| 236 | } |
| 237 | |
| 238 | /* |
| 239 | * wait for PCAN-USB Pro command response |
| 240 | */ |
| 241 | static int pcan_usb_pro_wait_rsp(struct peak_usb_device *dev, |
| 242 | struct pcan_usb_pro_msg *pum) |
| 243 | { |
| 244 | u8 req_data_type, req_channel; |
| 245 | int actual_length; |
| 246 | int i, err = 0; |
| 247 | |
| 248 | /* usb device unregistered? */ |
| 249 | if (!(dev->state & PCAN_USB_STATE_CONNECTED)) |
| 250 | return 0; |
| 251 | |
| 252 | req_data_type = pum->u.rec_buffer[4]; |
| 253 | req_channel = pum->u.rec_buffer[5]; |
| 254 | |
| 255 | *pum->u.rec_cnt = 0; |
| 256 | for (i = 0; !err && i < PCAN_USBPRO_RSP_SUBMIT_MAX; i++) { |
| 257 | struct pcan_usb_pro_msg rsp; |
| 258 | union pcan_usb_pro_rec *pr; |
| 259 | u32 r, rec_cnt; |
| 260 | u16 rec_len; |
| 261 | u8 *pc; |
| 262 | |
| 263 | err = usb_bulk_msg(dev->udev, |
| 264 | usb_rcvbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDIN), |
| 265 | pum->u.rec_buffer, pum->rec_buffer_len, |
| 266 | &actual_length, PCAN_USBPRO_COMMAND_TIMEOUT); |
| 267 | if (err) { |
| 268 | netdev_err(dev->netdev, "waiting rsp error %d\n", err); |
| 269 | break; |
| 270 | } |
| 271 | |
| 272 | if (actual_length == 0) |
| 273 | continue; |
| 274 | |
| 275 | err = -EBADMSG; |
| 276 | if (actual_length < PCAN_USBPRO_MSG_HEADER_LEN) { |
| 277 | netdev_err(dev->netdev, |
| 278 | "got abnormal too small rsp (len=%d)\n", |
| 279 | actual_length); |
| 280 | break; |
| 281 | } |
| 282 | |
| 283 | pc = pcan_msg_init(&rsp, pum->u.rec_buffer, |
| 284 | actual_length); |
| 285 | |
| 286 | rec_cnt = le32_to_cpu(*rsp.u.rec_cnt); |
| 287 | |
| 288 | /* loop on records stored into message */ |
| 289 | for (r = 0; r < rec_cnt; r++) { |
| 290 | pr = (union pcan_usb_pro_rec *)pc; |
| 291 | rec_len = pcan_usb_pro_sizeof_rec[pr->data_type]; |
| 292 | if (!rec_len) { |
| 293 | netdev_err(dev->netdev, |
| 294 | "got unprocessed record in msg\n"); |
Randy Dunlap | 56b9f30 | 2012-09-02 10:13:11 -0700 | [diff] [blame] | 295 | pcan_dump_mem("rcvd rsp msg", pum->u.rec_buffer, |
| 296 | actual_length); |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 297 | break; |
| 298 | } |
| 299 | |
| 300 | /* check if response corresponds to request */ |
| 301 | if (pr->data_type != req_data_type) |
| 302 | netdev_err(dev->netdev, |
| 303 | "got unwanted rsp %xh: ignored\n", |
| 304 | pr->data_type); |
| 305 | |
| 306 | /* check if channel in response corresponds too */ |
| 307 | else if ((req_channel != 0xff) && \ |
| 308 | (pr->bus_act.channel != req_channel)) |
| 309 | netdev_err(dev->netdev, |
| 310 | "got rsp %xh but on chan%u: ignored\n", |
| 311 | req_data_type, pr->bus_act.channel); |
| 312 | |
| 313 | /* got the response */ |
| 314 | else |
| 315 | return 0; |
| 316 | |
| 317 | /* otherwise, go on with next record in message */ |
| 318 | pc += rec_len; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | return (i >= PCAN_USBPRO_RSP_SUBMIT_MAX) ? -ERANGE : err; |
| 323 | } |
| 324 | |
| 325 | static int pcan_usb_pro_send_req(struct peak_usb_device *dev, int req_id, |
| 326 | int req_value, void *req_addr, int req_size) |
| 327 | { |
| 328 | int err; |
| 329 | u8 req_type; |
| 330 | unsigned int p; |
| 331 | |
| 332 | /* usb device unregistered? */ |
| 333 | if (!(dev->state & PCAN_USB_STATE_CONNECTED)) |
| 334 | return 0; |
| 335 | |
| 336 | memset(req_addr, '\0', req_size); |
| 337 | |
| 338 | req_type = USB_TYPE_VENDOR | USB_RECIP_OTHER; |
| 339 | |
| 340 | switch (req_id) { |
| 341 | case PCAN_USBPRO_REQ_FCT: |
| 342 | p = usb_sndctrlpipe(dev->udev, 0); |
| 343 | break; |
| 344 | |
| 345 | default: |
| 346 | p = usb_rcvctrlpipe(dev->udev, 0); |
| 347 | req_type |= USB_DIR_IN; |
| 348 | break; |
| 349 | } |
| 350 | |
| 351 | err = usb_control_msg(dev->udev, p, req_id, req_type, req_value, 0, |
| 352 | req_addr, req_size, 2 * USB_CTRL_GET_TIMEOUT); |
| 353 | if (err < 0) { |
| 354 | netdev_info(dev->netdev, |
| 355 | "unable to request usb[type=%d value=%d] err=%d\n", |
| 356 | req_id, req_value, err); |
| 357 | return err; |
| 358 | } |
| 359 | |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | static int pcan_usb_pro_set_ts(struct peak_usb_device *dev, u16 onoff) |
| 364 | { |
| 365 | struct pcan_usb_pro_msg um; |
| 366 | |
| 367 | pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN); |
| 368 | pcan_msg_add_rec(&um, PCAN_USBPRO_SETTS, onoff); |
| 369 | |
| 370 | return pcan_usb_pro_send_cmd(dev, &um); |
| 371 | } |
| 372 | |
| 373 | static int pcan_usb_pro_set_bitrate(struct peak_usb_device *dev, u32 ccbt) |
| 374 | { |
| 375 | struct pcan_usb_pro_device *pdev = |
| 376 | container_of(dev, struct pcan_usb_pro_device, dev); |
| 377 | struct pcan_usb_pro_msg um; |
| 378 | |
| 379 | pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN); |
| 380 | pcan_msg_add_rec(&um, PCAN_USBPRO_SETBTR, dev->ctrl_idx, ccbt); |
| 381 | |
| 382 | /* cache the CCBT value to reuse it before next buson */ |
| 383 | pdev->cached_ccbt = ccbt; |
| 384 | |
| 385 | return pcan_usb_pro_send_cmd(dev, &um); |
| 386 | } |
| 387 | |
| 388 | static int pcan_usb_pro_set_bus(struct peak_usb_device *dev, u8 onoff) |
| 389 | { |
| 390 | struct pcan_usb_pro_msg um; |
| 391 | |
| 392 | /* if bus=on, be sure the bitrate being set before! */ |
| 393 | if (onoff) { |
| 394 | struct pcan_usb_pro_device *pdev = |
| 395 | container_of(dev, struct pcan_usb_pro_device, dev); |
| 396 | |
| 397 | pcan_usb_pro_set_bitrate(dev, pdev->cached_ccbt); |
| 398 | } |
| 399 | |
| 400 | pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN); |
| 401 | pcan_msg_add_rec(&um, PCAN_USBPRO_SETBUSACT, dev->ctrl_idx, onoff); |
| 402 | |
| 403 | return pcan_usb_pro_send_cmd(dev, &um); |
| 404 | } |
| 405 | |
| 406 | static int pcan_usb_pro_set_silent(struct peak_usb_device *dev, u8 onoff) |
| 407 | { |
| 408 | struct pcan_usb_pro_msg um; |
| 409 | |
| 410 | pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN); |
| 411 | pcan_msg_add_rec(&um, PCAN_USBPRO_SETSILENT, dev->ctrl_idx, onoff); |
| 412 | |
| 413 | return pcan_usb_pro_send_cmd(dev, &um); |
| 414 | } |
| 415 | |
| 416 | static int pcan_usb_pro_set_filter(struct peak_usb_device *dev, u16 filter_mode) |
| 417 | { |
| 418 | struct pcan_usb_pro_msg um; |
| 419 | |
| 420 | pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN); |
| 421 | pcan_msg_add_rec(&um, PCAN_USBPRO_SETFILTR, dev->ctrl_idx, filter_mode); |
| 422 | |
| 423 | return pcan_usb_pro_send_cmd(dev, &um); |
| 424 | } |
| 425 | |
| 426 | static int pcan_usb_pro_set_led(struct peak_usb_device *dev, u8 mode, |
| 427 | u32 timeout) |
| 428 | { |
| 429 | struct pcan_usb_pro_msg um; |
| 430 | |
| 431 | pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN); |
| 432 | pcan_msg_add_rec(&um, PCAN_USBPRO_SETLED, dev->ctrl_idx, mode, timeout); |
| 433 | |
| 434 | return pcan_usb_pro_send_cmd(dev, &um); |
| 435 | } |
| 436 | |
| 437 | static int pcan_usb_pro_get_device_id(struct peak_usb_device *dev, |
| 438 | u32 *device_id) |
| 439 | { |
| 440 | struct pcan_usb_pro_devid *pdn; |
| 441 | struct pcan_usb_pro_msg um; |
| 442 | int err; |
| 443 | u8 *pc; |
| 444 | |
| 445 | pc = pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN); |
| 446 | pcan_msg_add_rec(&um, PCAN_USBPRO_GETDEVID, dev->ctrl_idx); |
| 447 | |
| 448 | err = pcan_usb_pro_send_cmd(dev, &um); |
| 449 | if (err) |
| 450 | return err; |
| 451 | |
| 452 | err = pcan_usb_pro_wait_rsp(dev, &um); |
| 453 | if (err) |
| 454 | return err; |
| 455 | |
| 456 | pdn = (struct pcan_usb_pro_devid *)pc; |
| 457 | if (device_id) |
| 458 | *device_id = le32_to_cpu(pdn->serial_num); |
| 459 | |
| 460 | return err; |
| 461 | } |
| 462 | |
| 463 | static int pcan_usb_pro_set_bittiming(struct peak_usb_device *dev, |
| 464 | struct can_bittiming *bt) |
| 465 | { |
| 466 | u32 ccbt; |
| 467 | |
| 468 | ccbt = (dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 0x00800000 : 0; |
| 469 | ccbt |= (bt->sjw - 1) << 24; |
| 470 | ccbt |= (bt->phase_seg2 - 1) << 20; |
| 471 | ccbt |= (bt->prop_seg + bt->phase_seg1 - 1) << 16; /* = tseg1 */ |
| 472 | ccbt |= bt->brp - 1; |
| 473 | |
| 474 | netdev_info(dev->netdev, "setting ccbt=0x%08x\n", ccbt); |
| 475 | |
| 476 | return pcan_usb_pro_set_bitrate(dev, ccbt); |
| 477 | } |
| 478 | |
| 479 | static void pcan_usb_pro_restart_complete(struct urb *urb) |
| 480 | { |
| 481 | /* can delete usb resources */ |
| 482 | peak_usb_async_complete(urb); |
| 483 | |
| 484 | /* notify candev and netdev */ |
| 485 | peak_usb_restart_complete(urb->context); |
| 486 | } |
| 487 | |
| 488 | /* |
| 489 | * handle restart but in asynchronously way |
| 490 | */ |
| 491 | static int pcan_usb_pro_restart_async(struct peak_usb_device *dev, |
| 492 | struct urb *urb, u8 *buf) |
| 493 | { |
| 494 | struct pcan_usb_pro_msg um; |
| 495 | |
| 496 | pcan_msg_init_empty(&um, buf, PCAN_USB_MAX_CMD_LEN); |
| 497 | pcan_msg_add_rec(&um, PCAN_USBPRO_SETBUSACT, dev->ctrl_idx, 1); |
| 498 | |
| 499 | usb_fill_bulk_urb(urb, dev->udev, |
| 500 | usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT), |
| 501 | buf, PCAN_USB_MAX_CMD_LEN, |
| 502 | pcan_usb_pro_restart_complete, dev); |
| 503 | |
| 504 | return usb_submit_urb(urb, GFP_ATOMIC); |
| 505 | } |
| 506 | |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 507 | static int pcan_usb_pro_drv_loaded(struct peak_usb_device *dev, int loaded) |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 508 | { |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 509 | u8 *buffer; |
| 510 | int err; |
| 511 | |
| 512 | buffer = kmalloc(PCAN_USBPRO_FCT_DRVLD_REQ_LEN, GFP_KERNEL); |
| 513 | if (!buffer) |
| 514 | return -ENOMEM; |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 515 | |
| 516 | buffer[0] = 0; |
| 517 | buffer[1] = !!loaded; |
| 518 | |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 519 | err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_FCT, |
| 520 | PCAN_USBPRO_FCT_DRVLD, buffer, |
| 521 | PCAN_USBPRO_FCT_DRVLD_REQ_LEN); |
| 522 | kfree(buffer); |
| 523 | |
| 524 | return err; |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | static inline |
| 528 | struct pcan_usb_pro_interface *pcan_usb_pro_dev_if(struct peak_usb_device *dev) |
| 529 | { |
| 530 | struct pcan_usb_pro_device *pdev = |
| 531 | container_of(dev, struct pcan_usb_pro_device, dev); |
| 532 | return pdev->usb_if; |
| 533 | } |
| 534 | |
| 535 | static int pcan_usb_pro_handle_canmsg(struct pcan_usb_pro_interface *usb_if, |
| 536 | struct pcan_usb_pro_rxmsg *rx) |
| 537 | { |
| 538 | const unsigned int ctrl_idx = (rx->len >> 4) & 0x0f; |
| 539 | struct peak_usb_device *dev = usb_if->dev[ctrl_idx]; |
| 540 | struct net_device *netdev = dev->netdev; |
| 541 | struct can_frame *can_frame; |
| 542 | struct sk_buff *skb; |
| 543 | struct timeval tv; |
Oliver Hartkopp | c9faaa0 | 2012-11-21 22:43:59 +0100 | [diff] [blame] | 544 | struct skb_shared_hwtstamps *hwts; |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 545 | |
| 546 | skb = alloc_can_skb(netdev, &can_frame); |
| 547 | if (!skb) |
| 548 | return -ENOMEM; |
| 549 | |
| 550 | can_frame->can_id = le32_to_cpu(rx->id); |
| 551 | can_frame->can_dlc = rx->len & 0x0f; |
| 552 | |
| 553 | if (rx->flags & PCAN_USBPRO_EXT) |
| 554 | can_frame->can_id |= CAN_EFF_FLAG; |
| 555 | |
| 556 | if (rx->flags & PCAN_USBPRO_RTR) |
| 557 | can_frame->can_id |= CAN_RTR_FLAG; |
| 558 | else |
| 559 | memcpy(can_frame->data, rx->data, can_frame->can_dlc); |
| 560 | |
| 561 | peak_usb_get_ts_tv(&usb_if->time_ref, le32_to_cpu(rx->ts32), &tv); |
Oliver Hartkopp | c9faaa0 | 2012-11-21 22:43:59 +0100 | [diff] [blame] | 562 | hwts = skb_hwtstamps(skb); |
| 563 | hwts->hwtstamp = timeval_to_ktime(tv); |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 564 | |
| 565 | netif_rx(skb); |
| 566 | netdev->stats.rx_packets++; |
| 567 | netdev->stats.rx_bytes += can_frame->can_dlc; |
| 568 | |
| 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | static int pcan_usb_pro_handle_error(struct pcan_usb_pro_interface *usb_if, |
| 573 | struct pcan_usb_pro_rxstatus *er) |
| 574 | { |
| 575 | const u32 raw_status = le32_to_cpu(er->status); |
| 576 | const unsigned int ctrl_idx = (er->channel >> 4) & 0x0f; |
| 577 | struct peak_usb_device *dev = usb_if->dev[ctrl_idx]; |
| 578 | struct net_device *netdev = dev->netdev; |
| 579 | struct can_frame *can_frame; |
| 580 | enum can_state new_state = CAN_STATE_ERROR_ACTIVE; |
| 581 | u8 err_mask = 0; |
| 582 | struct sk_buff *skb; |
| 583 | struct timeval tv; |
Oliver Hartkopp | c9faaa0 | 2012-11-21 22:43:59 +0100 | [diff] [blame] | 584 | struct skb_shared_hwtstamps *hwts; |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 585 | |
| 586 | /* nothing should be sent while in BUS_OFF state */ |
| 587 | if (dev->can.state == CAN_STATE_BUS_OFF) |
| 588 | return 0; |
| 589 | |
| 590 | if (!raw_status) { |
| 591 | /* no error bit (back to active state) */ |
| 592 | dev->can.state = CAN_STATE_ERROR_ACTIVE; |
| 593 | return 0; |
| 594 | } |
| 595 | |
| 596 | if (raw_status & (PCAN_USBPRO_STATUS_OVERRUN | |
| 597 | PCAN_USBPRO_STATUS_QOVERRUN)) { |
| 598 | /* trick to bypass next comparison and process other errors */ |
| 599 | new_state = CAN_STATE_MAX; |
| 600 | } |
| 601 | |
| 602 | if (raw_status & PCAN_USBPRO_STATUS_BUS) { |
| 603 | new_state = CAN_STATE_BUS_OFF; |
| 604 | } else if (raw_status & PCAN_USBPRO_STATUS_ERROR) { |
| 605 | u32 rx_err_cnt = (le32_to_cpu(er->err_frm) & 0x00ff0000) >> 16; |
| 606 | u32 tx_err_cnt = (le32_to_cpu(er->err_frm) & 0xff000000) >> 24; |
| 607 | |
| 608 | if (rx_err_cnt > 127) |
| 609 | err_mask |= CAN_ERR_CRTL_RX_PASSIVE; |
| 610 | else if (rx_err_cnt > 96) |
| 611 | err_mask |= CAN_ERR_CRTL_RX_WARNING; |
| 612 | |
| 613 | if (tx_err_cnt > 127) |
| 614 | err_mask |= CAN_ERR_CRTL_TX_PASSIVE; |
| 615 | else if (tx_err_cnt > 96) |
| 616 | err_mask |= CAN_ERR_CRTL_TX_WARNING; |
| 617 | |
| 618 | if (err_mask & (CAN_ERR_CRTL_RX_WARNING | |
| 619 | CAN_ERR_CRTL_TX_WARNING)) |
| 620 | new_state = CAN_STATE_ERROR_WARNING; |
| 621 | else if (err_mask & (CAN_ERR_CRTL_RX_PASSIVE | |
| 622 | CAN_ERR_CRTL_TX_PASSIVE)) |
| 623 | new_state = CAN_STATE_ERROR_PASSIVE; |
| 624 | } |
| 625 | |
| 626 | /* donot post any error if current state didn't change */ |
| 627 | if (dev->can.state == new_state) |
| 628 | return 0; |
| 629 | |
| 630 | /* allocate an skb to store the error frame */ |
| 631 | skb = alloc_can_err_skb(netdev, &can_frame); |
| 632 | if (!skb) |
| 633 | return -ENOMEM; |
| 634 | |
| 635 | switch (new_state) { |
| 636 | case CAN_STATE_BUS_OFF: |
| 637 | can_frame->can_id |= CAN_ERR_BUSOFF; |
| 638 | can_bus_off(netdev); |
| 639 | break; |
| 640 | |
| 641 | case CAN_STATE_ERROR_PASSIVE: |
| 642 | can_frame->can_id |= CAN_ERR_CRTL; |
| 643 | can_frame->data[1] |= err_mask; |
| 644 | dev->can.can_stats.error_passive++; |
| 645 | break; |
| 646 | |
| 647 | case CAN_STATE_ERROR_WARNING: |
| 648 | can_frame->can_id |= CAN_ERR_CRTL; |
| 649 | can_frame->data[1] |= err_mask; |
| 650 | dev->can.can_stats.error_warning++; |
| 651 | break; |
| 652 | |
| 653 | case CAN_STATE_ERROR_ACTIVE: |
| 654 | break; |
| 655 | |
| 656 | default: |
| 657 | /* CAN_STATE_MAX (trick to handle other errors) */ |
| 658 | if (raw_status & PCAN_USBPRO_STATUS_OVERRUN) { |
| 659 | can_frame->can_id |= CAN_ERR_PROT; |
| 660 | can_frame->data[2] |= CAN_ERR_PROT_OVERLOAD; |
| 661 | netdev->stats.rx_over_errors++; |
| 662 | netdev->stats.rx_errors++; |
| 663 | } |
| 664 | |
| 665 | if (raw_status & PCAN_USBPRO_STATUS_QOVERRUN) { |
| 666 | can_frame->can_id |= CAN_ERR_CRTL; |
| 667 | can_frame->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW; |
| 668 | netdev->stats.rx_over_errors++; |
| 669 | netdev->stats.rx_errors++; |
| 670 | } |
| 671 | |
| 672 | new_state = CAN_STATE_ERROR_ACTIVE; |
| 673 | break; |
| 674 | } |
| 675 | |
| 676 | dev->can.state = new_state; |
| 677 | |
| 678 | peak_usb_get_ts_tv(&usb_if->time_ref, le32_to_cpu(er->ts32), &tv); |
Oliver Hartkopp | c9faaa0 | 2012-11-21 22:43:59 +0100 | [diff] [blame] | 679 | hwts = skb_hwtstamps(skb); |
| 680 | hwts->hwtstamp = timeval_to_ktime(tv); |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 681 | netif_rx(skb); |
| 682 | netdev->stats.rx_packets++; |
| 683 | netdev->stats.rx_bytes += can_frame->can_dlc; |
| 684 | |
| 685 | return 0; |
| 686 | } |
| 687 | |
| 688 | static void pcan_usb_pro_handle_ts(struct pcan_usb_pro_interface *usb_if, |
| 689 | struct pcan_usb_pro_rxts *ts) |
| 690 | { |
| 691 | /* should wait until clock is stabilized */ |
| 692 | if (usb_if->cm_ignore_count > 0) |
| 693 | usb_if->cm_ignore_count--; |
| 694 | else |
| 695 | peak_usb_set_ts_now(&usb_if->time_ref, |
| 696 | le32_to_cpu(ts->ts64[1])); |
| 697 | } |
| 698 | |
| 699 | /* |
| 700 | * callback for bulk IN urb |
| 701 | */ |
| 702 | static int pcan_usb_pro_decode_buf(struct peak_usb_device *dev, struct urb *urb) |
| 703 | { |
| 704 | struct pcan_usb_pro_interface *usb_if = pcan_usb_pro_dev_if(dev); |
| 705 | struct net_device *netdev = dev->netdev; |
| 706 | struct pcan_usb_pro_msg usb_msg; |
| 707 | u8 *rec_ptr, *msg_end; |
| 708 | u16 rec_cnt; |
| 709 | int err = 0; |
| 710 | |
| 711 | rec_ptr = pcan_msg_init(&usb_msg, urb->transfer_buffer, |
| 712 | urb->actual_length); |
| 713 | if (!rec_ptr) { |
| 714 | netdev_err(netdev, "bad msg hdr len %d\n", urb->actual_length); |
| 715 | return -EINVAL; |
| 716 | } |
| 717 | |
| 718 | /* loop reading all the records from the incoming message */ |
| 719 | msg_end = urb->transfer_buffer + urb->actual_length; |
| 720 | rec_cnt = le16_to_cpu(*usb_msg.u.rec_cnt_rd); |
| 721 | for (; rec_cnt > 0; rec_cnt--) { |
| 722 | union pcan_usb_pro_rec *pr = (union pcan_usb_pro_rec *)rec_ptr; |
| 723 | u16 sizeof_rec = pcan_usb_pro_sizeof_rec[pr->data_type]; |
| 724 | |
| 725 | if (!sizeof_rec) { |
| 726 | netdev_err(netdev, |
| 727 | "got unsupported rec in usb msg:\n"); |
| 728 | err = -ENOTSUPP; |
| 729 | break; |
| 730 | } |
| 731 | |
| 732 | /* check if the record goes out of current packet */ |
| 733 | if (rec_ptr + sizeof_rec > msg_end) { |
| 734 | netdev_err(netdev, |
| 735 | "got frag rec: should inc usb rx buf size\n"); |
| 736 | err = -EBADMSG; |
| 737 | break; |
| 738 | } |
| 739 | |
| 740 | switch (pr->data_type) { |
| 741 | case PCAN_USBPRO_RXMSG8: |
| 742 | case PCAN_USBPRO_RXMSG4: |
| 743 | case PCAN_USBPRO_RXMSG0: |
| 744 | case PCAN_USBPRO_RXRTR: |
| 745 | err = pcan_usb_pro_handle_canmsg(usb_if, &pr->rx_msg); |
| 746 | if (err < 0) |
| 747 | goto fail; |
| 748 | break; |
| 749 | |
| 750 | case PCAN_USBPRO_RXSTATUS: |
| 751 | err = pcan_usb_pro_handle_error(usb_if, &pr->rx_status); |
| 752 | if (err < 0) |
| 753 | goto fail; |
| 754 | break; |
| 755 | |
| 756 | case PCAN_USBPRO_RXTS: |
| 757 | pcan_usb_pro_handle_ts(usb_if, &pr->rx_ts); |
| 758 | break; |
| 759 | |
| 760 | default: |
| 761 | netdev_err(netdev, |
| 762 | "unhandled rec type 0x%02x (%d): ignored\n", |
| 763 | pr->data_type, pr->data_type); |
| 764 | break; |
| 765 | } |
| 766 | |
| 767 | rec_ptr += sizeof_rec; |
| 768 | } |
| 769 | |
| 770 | fail: |
| 771 | if (err) |
Randy Dunlap | 56b9f30 | 2012-09-02 10:13:11 -0700 | [diff] [blame] | 772 | pcan_dump_mem("received msg", |
| 773 | urb->transfer_buffer, urb->actual_length); |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 774 | |
| 775 | return err; |
| 776 | } |
| 777 | |
| 778 | static int pcan_usb_pro_encode_msg(struct peak_usb_device *dev, |
| 779 | struct sk_buff *skb, u8 *obuf, size_t *size) |
| 780 | { |
| 781 | struct can_frame *cf = (struct can_frame *)skb->data; |
| 782 | u8 data_type, len, flags; |
| 783 | struct pcan_usb_pro_msg usb_msg; |
| 784 | |
| 785 | pcan_msg_init_empty(&usb_msg, obuf, *size); |
| 786 | |
| 787 | if ((cf->can_id & CAN_RTR_FLAG) || (cf->can_dlc == 0)) |
| 788 | data_type = PCAN_USBPRO_TXMSG0; |
| 789 | else if (cf->can_dlc <= 4) |
| 790 | data_type = PCAN_USBPRO_TXMSG4; |
| 791 | else |
| 792 | data_type = PCAN_USBPRO_TXMSG8; |
| 793 | |
| 794 | len = (dev->ctrl_idx << 4) | (cf->can_dlc & 0x0f); |
| 795 | |
| 796 | flags = 0; |
| 797 | if (cf->can_id & CAN_EFF_FLAG) |
| 798 | flags |= 0x02; |
| 799 | if (cf->can_id & CAN_RTR_FLAG) |
| 800 | flags |= 0x01; |
| 801 | |
| 802 | pcan_msg_add_rec(&usb_msg, data_type, 0, flags, len, cf->can_id, |
| 803 | cf->data); |
| 804 | |
| 805 | *size = usb_msg.rec_buffer_len; |
| 806 | |
| 807 | return 0; |
| 808 | } |
| 809 | |
| 810 | static int pcan_usb_pro_start(struct peak_usb_device *dev) |
| 811 | { |
| 812 | struct pcan_usb_pro_device *pdev = |
| 813 | container_of(dev, struct pcan_usb_pro_device, dev); |
| 814 | int err; |
| 815 | |
| 816 | err = pcan_usb_pro_set_silent(dev, |
| 817 | dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY); |
| 818 | if (err) |
| 819 | return err; |
| 820 | |
| 821 | /* filter mode: 0-> All OFF; 1->bypass */ |
| 822 | err = pcan_usb_pro_set_filter(dev, 1); |
| 823 | if (err) |
| 824 | return err; |
| 825 | |
| 826 | /* opening first device: */ |
| 827 | if (pdev->usb_if->dev_opened_count == 0) { |
| 828 | /* reset time_ref */ |
| 829 | peak_usb_init_time_ref(&pdev->usb_if->time_ref, &pcan_usb_pro); |
| 830 | |
| 831 | /* ask device to send ts messages */ |
| 832 | err = pcan_usb_pro_set_ts(dev, 1); |
| 833 | } |
| 834 | |
| 835 | pdev->usb_if->dev_opened_count++; |
| 836 | |
| 837 | return err; |
| 838 | } |
| 839 | |
| 840 | /* |
| 841 | * stop interface |
| 842 | * (last chance before set bus off) |
| 843 | */ |
| 844 | static int pcan_usb_pro_stop(struct peak_usb_device *dev) |
| 845 | { |
| 846 | struct pcan_usb_pro_device *pdev = |
| 847 | container_of(dev, struct pcan_usb_pro_device, dev); |
| 848 | |
| 849 | /* turn off ts msgs for that interface if no other dev opened */ |
| 850 | if (pdev->usb_if->dev_opened_count == 1) |
| 851 | pcan_usb_pro_set_ts(dev, 0); |
| 852 | |
| 853 | pdev->usb_if->dev_opened_count--; |
| 854 | |
| 855 | return 0; |
| 856 | } |
| 857 | |
| 858 | /* |
| 859 | * called when probing to initialize a device object. |
| 860 | */ |
| 861 | static int pcan_usb_pro_init(struct peak_usb_device *dev) |
| 862 | { |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 863 | struct pcan_usb_pro_device *pdev = |
| 864 | container_of(dev, struct pcan_usb_pro_device, dev); |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 865 | struct pcan_usb_pro_interface *usb_if = NULL; |
| 866 | struct pcan_usb_pro_fwinfo *fi = NULL; |
| 867 | struct pcan_usb_pro_blinfo *bi = NULL; |
| 868 | int err; |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 869 | |
| 870 | /* do this for 1st channel only */ |
| 871 | if (!dev->prev_siblings) { |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 872 | /* allocate netdevices common structure attached to first one */ |
| 873 | usb_if = kzalloc(sizeof(struct pcan_usb_pro_interface), |
| 874 | GFP_KERNEL); |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 875 | fi = kmalloc(sizeof(struct pcan_usb_pro_fwinfo), GFP_KERNEL); |
| 876 | bi = kmalloc(sizeof(struct pcan_usb_pro_blinfo), GFP_KERNEL); |
| 877 | if (!usb_if || !fi || !bi) { |
| 878 | err = -ENOMEM; |
| 879 | goto err_out; |
| 880 | } |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 881 | |
| 882 | /* number of ts msgs to ignore before taking one into account */ |
| 883 | usb_if->cm_ignore_count = 5; |
| 884 | |
| 885 | /* |
| 886 | * explicit use of dev_xxx() instead of netdev_xxx() here: |
| 887 | * information displayed are related to the device itself, not |
| 888 | * to the canx netdevices. |
| 889 | */ |
| 890 | err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO, |
| 891 | PCAN_USBPRO_INFO_FW, |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 892 | fi, sizeof(*fi)); |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 893 | if (err) { |
| 894 | dev_err(dev->netdev->dev.parent, |
| 895 | "unable to read %s firmware info (err %d)\n", |
| 896 | pcan_usb_pro.name, err); |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 897 | goto err_out; |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 898 | } |
| 899 | |
| 900 | err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO, |
| 901 | PCAN_USBPRO_INFO_BL, |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 902 | bi, sizeof(*bi)); |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 903 | if (err) { |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 904 | dev_err(dev->netdev->dev.parent, |
| 905 | "unable to read %s bootloader info (err %d)\n", |
| 906 | pcan_usb_pro.name, err); |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 907 | goto err_out; |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 908 | } |
| 909 | |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 910 | /* tell the device the can driver is running */ |
| 911 | err = pcan_usb_pro_drv_loaded(dev, 1); |
| 912 | if (err) |
| 913 | goto err_out; |
| 914 | |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 915 | dev_info(dev->netdev->dev.parent, |
| 916 | "PEAK-System %s hwrev %u serial %08X.%08X (%u channels)\n", |
| 917 | pcan_usb_pro.name, |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 918 | bi->hw_rev, bi->serial_num_hi, bi->serial_num_lo, |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 919 | pcan_usb_pro.ctrl_count); |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 920 | } else { |
| 921 | usb_if = pcan_usb_pro_dev_if(dev->prev_siblings); |
| 922 | } |
| 923 | |
| 924 | pdev->usb_if = usb_if; |
| 925 | usb_if->dev[dev->ctrl_idx] = dev; |
| 926 | |
| 927 | /* set LED in default state (end of init phase) */ |
| 928 | pcan_usb_pro_set_led(dev, 0, 1); |
| 929 | |
| 930 | return 0; |
Marc Kleine-Budde | f14e224 | 2013-05-16 11:36:40 +0200 | [diff] [blame] | 931 | |
| 932 | err_out: |
| 933 | kfree(bi); |
| 934 | kfree(fi); |
| 935 | kfree(usb_if); |
| 936 | |
| 937 | return err; |
Stephane Grosjean | d8a1993 | 2012-03-02 16:13:06 +0100 | [diff] [blame] | 938 | } |
| 939 | |
| 940 | static void pcan_usb_pro_exit(struct peak_usb_device *dev) |
| 941 | { |
| 942 | struct pcan_usb_pro_device *pdev = |
| 943 | container_of(dev, struct pcan_usb_pro_device, dev); |
| 944 | |
| 945 | /* |
| 946 | * when rmmod called before unplug and if down, should reset things |
| 947 | * before leaving |
| 948 | */ |
| 949 | if (dev->can.state != CAN_STATE_STOPPED) { |
| 950 | /* set bus off on the corresponding channel */ |
| 951 | pcan_usb_pro_set_bus(dev, 0); |
| 952 | } |
| 953 | |
| 954 | /* if channel #0 (only) */ |
| 955 | if (dev->ctrl_idx == 0) { |
| 956 | /* turn off calibration message if any device were opened */ |
| 957 | if (pdev->usb_if->dev_opened_count > 0) |
| 958 | pcan_usb_pro_set_ts(dev, 0); |
| 959 | |
| 960 | /* tell the PCAN-USB Pro device the driver is being unloaded */ |
| 961 | pcan_usb_pro_drv_loaded(dev, 0); |
| 962 | } |
| 963 | } |
| 964 | |
| 965 | /* |
| 966 | * called when PCAN-USB Pro adapter is unplugged |
| 967 | */ |
| 968 | static void pcan_usb_pro_free(struct peak_usb_device *dev) |
| 969 | { |
| 970 | /* last device: can free pcan_usb_pro_interface object now */ |
| 971 | if (!dev->prev_siblings && !dev->next_siblings) |
| 972 | kfree(pcan_usb_pro_dev_if(dev)); |
| 973 | } |
| 974 | |
| 975 | /* |
| 976 | * probe function for new PCAN-USB Pro usb interface |
| 977 | */ |
| 978 | static int pcan_usb_pro_probe(struct usb_interface *intf) |
| 979 | { |
| 980 | struct usb_host_interface *if_desc; |
| 981 | int i; |
| 982 | |
| 983 | if_desc = intf->altsetting; |
| 984 | |
| 985 | /* check interface endpoint addresses */ |
| 986 | for (i = 0; i < if_desc->desc.bNumEndpoints; i++) { |
| 987 | struct usb_endpoint_descriptor *ep = &if_desc->endpoint[i].desc; |
| 988 | |
| 989 | /* |
| 990 | * below is the list of valid ep addreses. Any other ep address |
| 991 | * is considered as not-CAN interface address => no dev created |
| 992 | */ |
| 993 | switch (ep->bEndpointAddress) { |
| 994 | case PCAN_USBPRO_EP_CMDOUT: |
| 995 | case PCAN_USBPRO_EP_CMDIN: |
| 996 | case PCAN_USBPRO_EP_MSGOUT_0: |
| 997 | case PCAN_USBPRO_EP_MSGOUT_1: |
| 998 | case PCAN_USBPRO_EP_MSGIN: |
| 999 | case PCAN_USBPRO_EP_UNUSED: |
| 1000 | break; |
| 1001 | default: |
| 1002 | return -ENODEV; |
| 1003 | } |
| 1004 | } |
| 1005 | |
| 1006 | return 0; |
| 1007 | } |
| 1008 | |
| 1009 | /* |
| 1010 | * describe the PCAN-USB Pro adapter |
| 1011 | */ |
| 1012 | struct peak_usb_adapter pcan_usb_pro = { |
| 1013 | .name = "PCAN-USB Pro", |
| 1014 | .device_id = PCAN_USBPRO_PRODUCT_ID, |
| 1015 | .ctrl_count = PCAN_USBPRO_CHANNEL_COUNT, |
| 1016 | .clock = { |
| 1017 | .freq = PCAN_USBPRO_CRYSTAL_HZ, |
| 1018 | }, |
| 1019 | .bittiming_const = { |
| 1020 | .name = "pcan_usb_pro", |
| 1021 | .tseg1_min = 1, |
| 1022 | .tseg1_max = 16, |
| 1023 | .tseg2_min = 1, |
| 1024 | .tseg2_max = 8, |
| 1025 | .sjw_max = 4, |
| 1026 | .brp_min = 1, |
| 1027 | .brp_max = 1024, |
| 1028 | .brp_inc = 1, |
| 1029 | }, |
| 1030 | |
| 1031 | /* size of device private data */ |
| 1032 | .sizeof_dev_private = sizeof(struct pcan_usb_pro_device), |
| 1033 | |
| 1034 | /* timestamps usage */ |
| 1035 | .ts_used_bits = 32, |
| 1036 | .ts_period = 1000000, /* calibration period in ts. */ |
| 1037 | .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ |
| 1038 | .us_per_ts_shift = 0, |
| 1039 | |
| 1040 | /* give here messages in/out endpoints */ |
| 1041 | .ep_msg_in = PCAN_USBPRO_EP_MSGIN, |
| 1042 | .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1}, |
| 1043 | |
| 1044 | /* size of rx/tx usb buffers */ |
| 1045 | .rx_buffer_size = PCAN_USBPRO_RX_BUFFER_SIZE, |
| 1046 | .tx_buffer_size = PCAN_USBPRO_TX_BUFFER_SIZE, |
| 1047 | |
| 1048 | /* device callbacks */ |
| 1049 | .intf_probe = pcan_usb_pro_probe, |
| 1050 | .dev_init = pcan_usb_pro_init, |
| 1051 | .dev_exit = pcan_usb_pro_exit, |
| 1052 | .dev_free = pcan_usb_pro_free, |
| 1053 | .dev_set_bus = pcan_usb_pro_set_bus, |
| 1054 | .dev_set_bittiming = pcan_usb_pro_set_bittiming, |
| 1055 | .dev_get_device_id = pcan_usb_pro_get_device_id, |
| 1056 | .dev_decode_buf = pcan_usb_pro_decode_buf, |
| 1057 | .dev_encode_msg = pcan_usb_pro_encode_msg, |
| 1058 | .dev_start = pcan_usb_pro_start, |
| 1059 | .dev_stop = pcan_usb_pro_stop, |
| 1060 | .dev_restart_async = pcan_usb_pro_restart_async, |
| 1061 | }; |