1 /* 2 * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter 3 * 4 * Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published 8 * by the Free Software Foundation; version 2 of the License. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 */ 15 #include <linux/netdevice.h> 16 #include <linux/usb.h> 17 #include <linux/module.h> 18 19 #include <linux/can.h> 20 #include <linux/can/dev.h> 21 #include <linux/can/error.h> 22 #include <linux/can/dev/peak_canfd.h> 23 24 #include "pcan_usb_core.h" 25 #include "pcan_usb_pro.h" 26 27 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB FD adapter"); 28 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro FD adapter"); 29 30 #define PCAN_USBPROFD_CHANNEL_COUNT 2 31 #define PCAN_USBFD_CHANNEL_COUNT 1 32 33 /* PCAN-USB Pro FD adapter internal clock (Hz) */ 34 #define PCAN_UFD_CRYSTAL_HZ 80000000 35 36 #define PCAN_UFD_CMD_BUFFER_SIZE 512 37 #define PCAN_UFD_LOSPD_PKT_SIZE 64 38 39 /* PCAN-USB Pro FD command timeout (ms.) */ 40 #define PCAN_UFD_CMD_TIMEOUT_MS 1000 41 42 /* PCAN-USB Pro FD rx/tx buffers size */ 43 #define PCAN_UFD_RX_BUFFER_SIZE 2048 44 #define PCAN_UFD_TX_BUFFER_SIZE 512 45 46 /* read some versions info from the hw devcie */ 47 struct __packed pcan_ufd_fw_info { 48 __le16 size_of; /* sizeof this */ 49 __le16 type; /* type of this structure */ 50 u8 hw_type; /* Type of hardware (HW_TYPE_xxx) */ 51 u8 bl_version[3]; /* Bootloader version */ 52 u8 hw_version; /* Hardware version (PCB) */ 53 u8 fw_version[3]; /* Firmware version */ 54 __le32 dev_id[2]; /* "device id" per CAN */ 55 __le32 ser_no; /* S/N */ 56 __le32 flags; /* special functions */ 57 }; 58 59 /* handle device specific info used by the netdevices */ 60 struct pcan_usb_fd_if { 61 struct peak_usb_device *dev[PCAN_USB_MAX_CHANNEL]; 62 struct pcan_ufd_fw_info fw_info; 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_fd_device { 70 struct peak_usb_device dev; 71 struct can_berr_counter bec; 72 struct pcan_usb_fd_if *usb_if; 73 u8 *cmd_buffer_addr; 74 }; 75 76 /* Extended USB commands (non uCAN commands) */ 77 78 /* Clock Modes command */ 79 #define PCAN_UFD_CMD_CLK_SET 0x80 80 81 #define PCAN_UFD_CLK_80MHZ 0x0 82 #define PCAN_UFD_CLK_60MHZ 0x1 83 #define PCAN_UFD_CLK_40MHZ 0x2 84 #define PCAN_UFD_CLK_30MHZ 0x3 85 #define PCAN_UFD_CLK_24MHZ 0x4 86 #define PCAN_UFD_CLK_20MHZ 0x5 87 #define PCAN_UFD_CLK_DEF PCAN_UFD_CLK_80MHZ 88 89 struct __packed pcan_ufd_clock { 90 __le16 opcode_channel; 91 92 u8 mode; 93 u8 unused[5]; 94 }; 95 96 /* LED control command */ 97 #define PCAN_UFD_CMD_LED_SET 0x86 98 99 #define PCAN_UFD_LED_DEV 0x00 100 #define PCAN_UFD_LED_FAST 0x01 101 #define PCAN_UFD_LED_SLOW 0x02 102 #define PCAN_UFD_LED_ON 0x03 103 #define PCAN_UFD_LED_OFF 0x04 104 #define PCAN_UFD_LED_DEF PCAN_UFD_LED_DEV 105 106 struct __packed pcan_ufd_led { 107 __le16 opcode_channel; 108 109 u8 mode; 110 u8 unused[5]; 111 }; 112 113 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */ 114 #define PCAN_UFD_FLTEXT_CALIBRATION 0x8000 115 116 struct __packed pcan_ufd_options { 117 __le16 opcode_channel; 118 119 __le16 ucan_mask; 120 u16 unused; 121 __le16 usb_mask; 122 }; 123 124 /* Extended usage of uCAN messages for PCAN-USB Pro FD */ 125 #define PCAN_UFD_MSG_CALIBRATION 0x100 126 127 struct __packed pcan_ufd_ts_msg { 128 __le16 size; 129 __le16 type; 130 __le32 ts_low; 131 __le32 ts_high; 132 __le16 usb_frame_index; 133 u16 unused; 134 }; 135 136 #define PCAN_UFD_MSG_OVERRUN 0x101 137 138 #define PCAN_UFD_OVMSG_CHANNEL(o) ((o)->channel & 0xf) 139 140 struct __packed pcan_ufd_ovr_msg { 141 __le16 size; 142 __le16 type; 143 __le32 ts_low; 144 __le32 ts_high; 145 u8 channel; 146 u8 unused[3]; 147 }; 148 149 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om) 150 { 151 return om->channel & 0xf; 152 } 153 154 /* Clock mode frequency values */ 155 static const u32 pcan_usb_fd_clk_freq[6] = { 156 [PCAN_UFD_CLK_80MHZ] = 80000000, 157 [PCAN_UFD_CLK_60MHZ] = 60000000, 158 [PCAN_UFD_CLK_40MHZ] = 40000000, 159 [PCAN_UFD_CLK_30MHZ] = 30000000, 160 [PCAN_UFD_CLK_24MHZ] = 24000000, 161 [PCAN_UFD_CLK_20MHZ] = 20000000 162 }; 163 164 /* return a device USB interface */ 165 static inline 166 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev) 167 { 168 struct pcan_usb_fd_device *pdev = 169 container_of(dev, struct pcan_usb_fd_device, dev); 170 return pdev->usb_if; 171 } 172 173 /* return a device USB commands buffer */ 174 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev) 175 { 176 struct pcan_usb_fd_device *pdev = 177 container_of(dev, struct pcan_usb_fd_device, dev); 178 return pdev->cmd_buffer_addr; 179 } 180 181 /* send PCAN-USB Pro FD commands synchronously */ 182 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail) 183 { 184 void *cmd_head = pcan_usb_fd_cmd_buffer(dev); 185 int err = 0; 186 u8 *packet_ptr; 187 int packet_len; 188 ptrdiff_t cmd_len; 189 190 /* usb device unregistered? */ 191 if (!(dev->state & PCAN_USB_STATE_CONNECTED)) 192 return 0; 193 194 /* if a packet is not filled completely by commands, the command list 195 * is terminated with an "end of collection" record. 196 */ 197 cmd_len = cmd_tail - cmd_head; 198 if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) { 199 memset(cmd_tail, 0xff, sizeof(u64)); 200 cmd_len += sizeof(u64); 201 } 202 203 packet_ptr = cmd_head; 204 packet_len = cmd_len; 205 206 /* firmware is not able to re-assemble 512 bytes buffer in full-speed */ 207 if (unlikely(dev->udev->speed != USB_SPEED_HIGH)) 208 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE); 209 210 do { 211 err = usb_bulk_msg(dev->udev, 212 usb_sndbulkpipe(dev->udev, 213 PCAN_USBPRO_EP_CMDOUT), 214 packet_ptr, packet_len, 215 NULL, PCAN_UFD_CMD_TIMEOUT_MS); 216 if (err) { 217 netdev_err(dev->netdev, 218 "sending command failure: %d\n", err); 219 break; 220 } 221 222 packet_ptr += packet_len; 223 cmd_len -= packet_len; 224 225 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE) 226 packet_len = cmd_len; 227 228 } while (packet_len > 0); 229 230 return err; 231 } 232 233 /* build the commands list in the given buffer, to enter operational mode */ 234 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf) 235 { 236 struct pucan_wr_err_cnt *prc; 237 struct pucan_command *cmd; 238 u8 *pc = buf; 239 240 /* 1st, reset error counters: */ 241 prc = (struct pucan_wr_err_cnt *)pc; 242 prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 243 PUCAN_CMD_WR_ERR_CNT); 244 245 /* select both counters */ 246 prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE); 247 248 /* and reset their values */ 249 prc->tx_counter = 0; 250 prc->rx_counter = 0; 251 252 /* moves the pointer forward */ 253 pc += sizeof(struct pucan_wr_err_cnt); 254 255 /* add command to switch from ISO to non-ISO mode, if fw allows it */ 256 if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) { 257 struct pucan_options *puo = (struct pucan_options *)pc; 258 259 puo->opcode_channel = 260 (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ? 261 pucan_cmd_opcode_channel(dev->ctrl_idx, 262 PUCAN_CMD_CLR_DIS_OPTION) : 263 pucan_cmd_opcode_channel(dev->ctrl_idx, 264 PUCAN_CMD_SET_EN_OPTION); 265 266 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO); 267 268 /* to be sure that no other extended bits will be taken into 269 * account 270 */ 271 puo->unused = 0; 272 273 /* moves the pointer forward */ 274 pc += sizeof(struct pucan_options); 275 } 276 277 /* next, go back to operational mode */ 278 cmd = (struct pucan_command *)pc; 279 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 280 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ? 281 PUCAN_CMD_LISTEN_ONLY_MODE : 282 PUCAN_CMD_NORMAL_MODE); 283 pc += sizeof(struct pucan_command); 284 285 return pc - buf; 286 } 287 288 /* set CAN bus on/off */ 289 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff) 290 { 291 u8 *pc = pcan_usb_fd_cmd_buffer(dev); 292 int l; 293 294 if (onoff) { 295 /* build the cmds list to enter operational mode */ 296 l = pcan_usb_fd_build_restart_cmd(dev, pc); 297 } else { 298 struct pucan_command *cmd = (struct pucan_command *)pc; 299 300 /* build cmd to go back to reset mode */ 301 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 302 PUCAN_CMD_RESET_MODE); 303 l = sizeof(struct pucan_command); 304 } 305 306 /* send the command */ 307 return pcan_usb_fd_send_cmd(dev, pc + l); 308 } 309 310 /* set filtering masks: 311 * 312 * idx in range [0..63] selects a row #idx, all rows otherwise 313 * mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s) 314 * 315 * Each bit of this 64 x 32 bits array defines a CANID value: 316 * 317 * bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while 318 * bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded. 319 */ 320 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx, 321 u32 mask) 322 { 323 struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev); 324 int i, n; 325 326 /* select all rows when idx is out of range [0..63] */ 327 if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) { 328 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS; 329 idx = 0; 330 331 /* select the row (and only the row) otherwise */ 332 } else { 333 n = idx + 1; 334 } 335 336 for (i = idx; i < n; i++, cmd++) { 337 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 338 PUCAN_CMD_FILTER_STD); 339 cmd->idx = cpu_to_le16(i); 340 cmd->mask = cpu_to_le32(mask); 341 } 342 343 /* send the command */ 344 return pcan_usb_fd_send_cmd(dev, cmd); 345 } 346 347 /* set/unset options 348 * 349 * onoff set(1)/unset(0) options 350 * mask each bit defines a kind of options to set/unset 351 */ 352 static int pcan_usb_fd_set_options(struct peak_usb_device *dev, 353 bool onoff, u16 ucan_mask, u16 usb_mask) 354 { 355 struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev); 356 357 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 358 (onoff) ? PUCAN_CMD_SET_EN_OPTION : 359 PUCAN_CMD_CLR_DIS_OPTION); 360 361 cmd->ucan_mask = cpu_to_le16(ucan_mask); 362 cmd->usb_mask = cpu_to_le16(usb_mask); 363 364 /* send the command */ 365 return pcan_usb_fd_send_cmd(dev, ++cmd); 366 } 367 368 /* setup LED control */ 369 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode) 370 { 371 struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev); 372 373 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 374 PCAN_UFD_CMD_LED_SET); 375 cmd->mode = led_mode; 376 377 /* send the command */ 378 return pcan_usb_fd_send_cmd(dev, ++cmd); 379 } 380 381 /* set CAN clock domain */ 382 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev, 383 u8 clk_mode) 384 { 385 struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev); 386 387 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 388 PCAN_UFD_CMD_CLK_SET); 389 cmd->mode = clk_mode; 390 391 /* send the command */ 392 return pcan_usb_fd_send_cmd(dev, ++cmd); 393 } 394 395 /* set bittiming for CAN and CAN-FD header */ 396 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev, 397 struct can_bittiming *bt) 398 { 399 struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev); 400 401 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 402 PUCAN_CMD_TIMING_SLOW); 403 cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1, 404 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES); 405 406 cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1); 407 cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1); 408 cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1)); 409 410 cmd->ewl = 96; /* default */ 411 412 /* send the command */ 413 return pcan_usb_fd_send_cmd(dev, ++cmd); 414 } 415 416 /* set CAN-FD bittiming for data */ 417 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev, 418 struct can_bittiming *bt) 419 { 420 struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev); 421 422 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 423 PUCAN_CMD_TIMING_FAST); 424 cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1); 425 cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1); 426 cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1); 427 cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1)); 428 429 /* send the command */ 430 return pcan_usb_fd_send_cmd(dev, ++cmd); 431 } 432 433 /* handle restart but in asynchronously way 434 * (uses PCAN-USB Pro code to complete asynchronous request) 435 */ 436 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev, 437 struct urb *urb, u8 *buf) 438 { 439 u8 *pc = buf; 440 441 /* build the entire cmds list in the provided buffer, to go back into 442 * operational mode. 443 */ 444 pc += pcan_usb_fd_build_restart_cmd(dev, pc); 445 446 /* add EOC */ 447 memset(pc, 0xff, sizeof(struct pucan_command)); 448 pc += sizeof(struct pucan_command); 449 450 /* complete the URB */ 451 usb_fill_bulk_urb(urb, dev->udev, 452 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT), 453 buf, pc - buf, 454 pcan_usb_pro_restart_complete, dev); 455 456 /* and submit it. */ 457 return usb_submit_urb(urb, GFP_ATOMIC); 458 } 459 460 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded) 461 { 462 struct pcan_usb_fd_device *pdev = 463 container_of(dev, struct pcan_usb_fd_device, dev); 464 465 pdev->cmd_buffer_addr[0] = 0; 466 pdev->cmd_buffer_addr[1] = !!loaded; 467 468 return pcan_usb_pro_send_req(dev, 469 PCAN_USBPRO_REQ_FCT, 470 PCAN_USBPRO_FCT_DRVLD, 471 pdev->cmd_buffer_addr, 472 PCAN_USBPRO_FCT_DRVLD_REQ_LEN); 473 } 474 475 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if, 476 struct pucan_msg *rx_msg) 477 { 478 struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg; 479 struct peak_usb_device *dev = usb_if->dev[pucan_msg_get_channel(rm)]; 480 struct net_device *netdev = dev->netdev; 481 struct canfd_frame *cfd; 482 struct sk_buff *skb; 483 const u16 rx_msg_flags = le16_to_cpu(rm->flags); 484 485 if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) { 486 /* CANFD frame case */ 487 skb = alloc_canfd_skb(netdev, &cfd); 488 if (!skb) 489 return -ENOMEM; 490 491 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH) 492 cfd->flags |= CANFD_BRS; 493 494 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND) 495 cfd->flags |= CANFD_ESI; 496 497 cfd->len = can_dlc2len(get_canfd_dlc(pucan_msg_get_dlc(rm))); 498 } else { 499 /* CAN 2.0 frame case */ 500 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd); 501 if (!skb) 502 return -ENOMEM; 503 504 cfd->len = get_can_dlc(pucan_msg_get_dlc(rm)); 505 } 506 507 cfd->can_id = le32_to_cpu(rm->can_id); 508 509 if (rx_msg_flags & PUCAN_MSG_EXT_ID) 510 cfd->can_id |= CAN_EFF_FLAG; 511 512 if (rx_msg_flags & PUCAN_MSG_RTR) 513 cfd->can_id |= CAN_RTR_FLAG; 514 else 515 memcpy(cfd->data, rm->d, cfd->len); 516 517 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low)); 518 519 netdev->stats.rx_packets++; 520 netdev->stats.rx_bytes += cfd->len; 521 522 return 0; 523 } 524 525 /* handle uCAN status message */ 526 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if, 527 struct pucan_msg *rx_msg) 528 { 529 struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg; 530 struct peak_usb_device *dev = usb_if->dev[pucan_stmsg_get_channel(sm)]; 531 struct pcan_usb_fd_device *pdev = 532 container_of(dev, struct pcan_usb_fd_device, dev); 533 enum can_state new_state = CAN_STATE_ERROR_ACTIVE; 534 enum can_state rx_state, tx_state; 535 struct net_device *netdev = dev->netdev; 536 struct can_frame *cf; 537 struct sk_buff *skb; 538 539 /* nothing should be sent while in BUS_OFF state */ 540 if (dev->can.state == CAN_STATE_BUS_OFF) 541 return 0; 542 543 if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) { 544 new_state = CAN_STATE_BUS_OFF; 545 } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) { 546 new_state = CAN_STATE_ERROR_PASSIVE; 547 } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) { 548 new_state = CAN_STATE_ERROR_WARNING; 549 } else { 550 /* no error bit (so, no error skb, back to active state) */ 551 dev->can.state = CAN_STATE_ERROR_ACTIVE; 552 pdev->bec.txerr = 0; 553 pdev->bec.rxerr = 0; 554 return 0; 555 } 556 557 /* state hasn't changed */ 558 if (new_state == dev->can.state) 559 return 0; 560 561 /* handle bus state change */ 562 tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0; 563 rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0; 564 565 /* allocate an skb to store the error frame */ 566 skb = alloc_can_err_skb(netdev, &cf); 567 if (skb) 568 can_change_state(netdev, cf, tx_state, rx_state); 569 570 /* things must be done even in case of OOM */ 571 if (new_state == CAN_STATE_BUS_OFF) 572 can_bus_off(netdev); 573 574 if (!skb) 575 return -ENOMEM; 576 577 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low)); 578 579 netdev->stats.rx_packets++; 580 netdev->stats.rx_bytes += cf->can_dlc; 581 582 return 0; 583 } 584 585 /* handle uCAN error message */ 586 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if, 587 struct pucan_msg *rx_msg) 588 { 589 struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg; 590 struct peak_usb_device *dev = usb_if->dev[pucan_ermsg_get_channel(er)]; 591 struct pcan_usb_fd_device *pdev = 592 container_of(dev, struct pcan_usb_fd_device, dev); 593 594 /* keep a trace of tx and rx error counters for later use */ 595 pdev->bec.txerr = er->tx_err_cnt; 596 pdev->bec.rxerr = er->rx_err_cnt; 597 598 return 0; 599 } 600 601 /* handle uCAN overrun message */ 602 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if, 603 struct pucan_msg *rx_msg) 604 { 605 struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg; 606 struct peak_usb_device *dev = usb_if->dev[pufd_omsg_get_channel(ov)]; 607 struct net_device *netdev = dev->netdev; 608 struct can_frame *cf; 609 struct sk_buff *skb; 610 611 /* allocate an skb to store the error frame */ 612 skb = alloc_can_err_skb(netdev, &cf); 613 if (!skb) 614 return -ENOMEM; 615 616 cf->can_id |= CAN_ERR_CRTL; 617 cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW; 618 619 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low)); 620 621 netdev->stats.rx_over_errors++; 622 netdev->stats.rx_errors++; 623 624 return 0; 625 } 626 627 /* handle USB calibration message */ 628 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if, 629 struct pucan_msg *rx_msg) 630 { 631 struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg; 632 633 /* should wait until clock is stabilized */ 634 if (usb_if->cm_ignore_count > 0) 635 usb_if->cm_ignore_count--; 636 else 637 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low)); 638 } 639 640 /* callback for bulk IN urb */ 641 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb) 642 { 643 struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev); 644 struct net_device *netdev = dev->netdev; 645 struct pucan_msg *rx_msg; 646 u8 *msg_ptr, *msg_end; 647 int err = 0; 648 649 /* loop reading all the records from the incoming message */ 650 msg_ptr = urb->transfer_buffer; 651 msg_end = urb->transfer_buffer + urb->actual_length; 652 for (; msg_ptr < msg_end;) { 653 u16 rx_msg_type, rx_msg_size; 654 655 rx_msg = (struct pucan_msg *)msg_ptr; 656 if (!rx_msg->size) { 657 /* null packet found: end of list */ 658 break; 659 } 660 661 rx_msg_size = le16_to_cpu(rx_msg->size); 662 rx_msg_type = le16_to_cpu(rx_msg->type); 663 664 /* check if the record goes out of current packet */ 665 if (msg_ptr + rx_msg_size > msg_end) { 666 netdev_err(netdev, 667 "got frag rec: should inc usb rx buf sze\n"); 668 err = -EBADMSG; 669 break; 670 } 671 672 switch (rx_msg_type) { 673 case PUCAN_MSG_CAN_RX: 674 err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg); 675 if (err < 0) 676 goto fail; 677 break; 678 679 case PCAN_UFD_MSG_CALIBRATION: 680 pcan_usb_fd_decode_ts(usb_if, rx_msg); 681 break; 682 683 case PUCAN_MSG_ERROR: 684 err = pcan_usb_fd_decode_error(usb_if, rx_msg); 685 if (err < 0) 686 goto fail; 687 break; 688 689 case PUCAN_MSG_STATUS: 690 err = pcan_usb_fd_decode_status(usb_if, rx_msg); 691 if (err < 0) 692 goto fail; 693 break; 694 695 case PCAN_UFD_MSG_OVERRUN: 696 err = pcan_usb_fd_decode_overrun(usb_if, rx_msg); 697 if (err < 0) 698 goto fail; 699 break; 700 701 default: 702 netdev_err(netdev, 703 "unhandled msg type 0x%02x (%d): ignored\n", 704 rx_msg_type, rx_msg_type); 705 break; 706 } 707 708 msg_ptr += rx_msg_size; 709 } 710 711 fail: 712 if (err) 713 pcan_dump_mem("received msg", 714 urb->transfer_buffer, urb->actual_length); 715 return err; 716 } 717 718 /* CAN/CANFD frames encoding callback */ 719 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev, 720 struct sk_buff *skb, u8 *obuf, size_t *size) 721 { 722 struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf; 723 struct canfd_frame *cfd = (struct canfd_frame *)skb->data; 724 u16 tx_msg_size, tx_msg_flags; 725 u8 can_dlc; 726 727 tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4); 728 tx_msg->size = cpu_to_le16(tx_msg_size); 729 tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX); 730 731 tx_msg_flags = 0; 732 if (cfd->can_id & CAN_EFF_FLAG) { 733 tx_msg_flags |= PUCAN_MSG_EXT_ID; 734 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK); 735 } else { 736 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK); 737 } 738 739 if (can_is_canfd_skb(skb)) { 740 /* considering a CANFD frame */ 741 can_dlc = can_len2dlc(cfd->len); 742 743 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN; 744 745 if (cfd->flags & CANFD_BRS) 746 tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH; 747 748 if (cfd->flags & CANFD_ESI) 749 tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND; 750 } else { 751 /* CAND 2.0 frames */ 752 can_dlc = cfd->len; 753 754 if (cfd->can_id & CAN_RTR_FLAG) 755 tx_msg_flags |= PUCAN_MSG_RTR; 756 } 757 758 tx_msg->flags = cpu_to_le16(tx_msg_flags); 759 tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, can_dlc); 760 memcpy(tx_msg->d, cfd->data, cfd->len); 761 762 /* add null size message to tag the end (messages are 32-bits aligned) 763 */ 764 tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size); 765 766 tx_msg->size = 0; 767 768 /* set the whole size of the USB packet to send */ 769 *size = tx_msg_size + sizeof(u32); 770 771 return 0; 772 } 773 774 /* start the interface (last chance before set bus on) */ 775 static int pcan_usb_fd_start(struct peak_usb_device *dev) 776 { 777 struct pcan_usb_fd_device *pdev = 778 container_of(dev, struct pcan_usb_fd_device, dev); 779 int err; 780 781 /* set filter mode: all acceptance */ 782 err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff); 783 if (err) 784 return err; 785 786 /* opening first device: */ 787 if (pdev->usb_if->dev_opened_count == 0) { 788 /* reset time_ref */ 789 peak_usb_init_time_ref(&pdev->usb_if->time_ref, 790 &pcan_usb_pro_fd); 791 792 /* enable USB calibration messages */ 793 err = pcan_usb_fd_set_options(dev, 1, 794 PUCAN_OPTION_ERROR, 795 PCAN_UFD_FLTEXT_CALIBRATION); 796 } 797 798 pdev->usb_if->dev_opened_count++; 799 800 /* reset cached error counters */ 801 pdev->bec.txerr = 0; 802 pdev->bec.rxerr = 0; 803 804 return err; 805 } 806 807 /* socket callback used to copy berr counters values receieved through USB */ 808 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev, 809 struct can_berr_counter *bec) 810 { 811 struct peak_usb_device *dev = netdev_priv(netdev); 812 struct pcan_usb_fd_device *pdev = 813 container_of(dev, struct pcan_usb_fd_device, dev); 814 815 *bec = pdev->bec; 816 817 /* must return 0 */ 818 return 0; 819 } 820 821 /* stop interface (last chance before set bus off) */ 822 static int pcan_usb_fd_stop(struct peak_usb_device *dev) 823 { 824 struct pcan_usb_fd_device *pdev = 825 container_of(dev, struct pcan_usb_fd_device, dev); 826 827 /* turn off special msgs for that interface if no other dev opened */ 828 if (pdev->usb_if->dev_opened_count == 1) 829 pcan_usb_fd_set_options(dev, 0, 830 PUCAN_OPTION_ERROR, 831 PCAN_UFD_FLTEXT_CALIBRATION); 832 pdev->usb_if->dev_opened_count--; 833 834 return 0; 835 } 836 837 /* called when probing, to initialize a device object */ 838 static int pcan_usb_fd_init(struct peak_usb_device *dev) 839 { 840 struct pcan_usb_fd_device *pdev = 841 container_of(dev, struct pcan_usb_fd_device, dev); 842 int i, err = -ENOMEM; 843 844 /* do this for 1st channel only */ 845 if (!dev->prev_siblings) { 846 /* allocate netdevices common structure attached to first one */ 847 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL); 848 if (!pdev->usb_if) 849 goto err_out; 850 851 /* allocate command buffer once for all for the interface */ 852 pdev->cmd_buffer_addr = kmalloc(PCAN_UFD_CMD_BUFFER_SIZE, 853 GFP_KERNEL); 854 if (!pdev->cmd_buffer_addr) 855 goto err_out_1; 856 857 /* number of ts msgs to ignore before taking one into account */ 858 pdev->usb_if->cm_ignore_count = 5; 859 860 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO, 861 PCAN_USBPRO_INFO_FW, 862 &pdev->usb_if->fw_info, 863 sizeof(pdev->usb_if->fw_info)); 864 if (err) { 865 dev_err(dev->netdev->dev.parent, 866 "unable to read %s firmware info (err %d)\n", 867 dev->adapter->name, err); 868 goto err_out_2; 869 } 870 871 /* explicit use of dev_xxx() instead of netdev_xxx() here: 872 * information displayed are related to the device itself, not 873 * to the canx (channel) device. 874 */ 875 dev_info(dev->netdev->dev.parent, 876 "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n", 877 dev->adapter->name, pdev->usb_if->fw_info.hw_version, 878 pdev->usb_if->fw_info.fw_version[0], 879 pdev->usb_if->fw_info.fw_version[1], 880 pdev->usb_if->fw_info.fw_version[2], 881 dev->adapter->ctrl_count); 882 883 /* check for ability to switch between ISO/non-ISO modes */ 884 if (pdev->usb_if->fw_info.fw_version[0] >= 2) { 885 /* firmware >= 2.x supports ISO/non-ISO switching */ 886 dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO; 887 } else { 888 /* firmware < 2.x only supports fixed(!) non-ISO */ 889 dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO; 890 } 891 892 /* tell the hardware the can driver is running */ 893 err = pcan_usb_fd_drv_loaded(dev, 1); 894 if (err) { 895 dev_err(dev->netdev->dev.parent, 896 "unable to tell %s driver is loaded (err %d)\n", 897 dev->adapter->name, err); 898 goto err_out_2; 899 } 900 } else { 901 /* otherwise, simply copy previous sibling's values */ 902 struct pcan_usb_fd_device *ppdev = 903 container_of(dev->prev_siblings, 904 struct pcan_usb_fd_device, dev); 905 906 pdev->usb_if = ppdev->usb_if; 907 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr; 908 909 /* do a copy of the ctrlmode[_supported] too */ 910 dev->can.ctrlmode = ppdev->dev.can.ctrlmode; 911 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported; 912 } 913 914 pdev->usb_if->dev[dev->ctrl_idx] = dev; 915 dev->device_number = 916 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]); 917 918 /* set clock domain */ 919 for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++) 920 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i]) 921 break; 922 923 if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) { 924 dev_warn(dev->netdev->dev.parent, 925 "incompatible clock frequencies\n"); 926 err = -EINVAL; 927 goto err_out_2; 928 } 929 930 pcan_usb_fd_set_clock_domain(dev, i); 931 932 /* set LED in default state (end of init phase) */ 933 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF); 934 935 return 0; 936 937 err_out_2: 938 kfree(pdev->cmd_buffer_addr); 939 err_out_1: 940 kfree(pdev->usb_if); 941 err_out: 942 return err; 943 } 944 945 /* called when driver module is being unloaded */ 946 static void pcan_usb_fd_exit(struct peak_usb_device *dev) 947 { 948 struct pcan_usb_fd_device *pdev = 949 container_of(dev, struct pcan_usb_fd_device, dev); 950 951 /* when rmmod called before unplug and if down, should reset things 952 * before leaving 953 */ 954 if (dev->can.state != CAN_STATE_STOPPED) { 955 /* set bus off on the corresponding channel */ 956 pcan_usb_fd_set_bus(dev, 0); 957 } 958 959 /* switch off corresponding CAN LEDs */ 960 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF); 961 962 /* if channel #0 (only) */ 963 if (dev->ctrl_idx == 0) { 964 /* turn off calibration message if any device were opened */ 965 if (pdev->usb_if->dev_opened_count > 0) 966 pcan_usb_fd_set_options(dev, 0, 967 PUCAN_OPTION_ERROR, 968 PCAN_UFD_FLTEXT_CALIBRATION); 969 970 /* tell USB adapter that the driver is being unloaded */ 971 pcan_usb_fd_drv_loaded(dev, 0); 972 } 973 } 974 975 /* called when the USB adapter is unplugged */ 976 static void pcan_usb_fd_free(struct peak_usb_device *dev) 977 { 978 /* last device: can free shared objects now */ 979 if (!dev->prev_siblings && !dev->next_siblings) { 980 struct pcan_usb_fd_device *pdev = 981 container_of(dev, struct pcan_usb_fd_device, dev); 982 983 /* free commands buffer */ 984 kfree(pdev->cmd_buffer_addr); 985 986 /* free usb interface object */ 987 kfree(pdev->usb_if); 988 } 989 } 990 991 /* describes the PCAN-USB FD adapter */ 992 static const struct can_bittiming_const pcan_usb_fd_const = { 993 .name = "pcan_usb_fd", 994 .tseg1_min = 1, 995 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 996 .tseg2_min = 1, 997 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 998 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 999 .brp_min = 1, 1000 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1001 .brp_inc = 1, 1002 }; 1003 1004 static const struct can_bittiming_const pcan_usb_fd_data_const = { 1005 .name = "pcan_usb_fd", 1006 .tseg1_min = 1, 1007 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1008 .tseg2_min = 1, 1009 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1010 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1011 .brp_min = 1, 1012 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1013 .brp_inc = 1, 1014 }; 1015 1016 const struct peak_usb_adapter pcan_usb_fd = { 1017 .name = "PCAN-USB FD", 1018 .device_id = PCAN_USBFD_PRODUCT_ID, 1019 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT, 1020 .ctrlmode_supported = CAN_CTRLMODE_FD | 1021 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY, 1022 .clock = { 1023 .freq = PCAN_UFD_CRYSTAL_HZ, 1024 }, 1025 .bittiming_const = &pcan_usb_fd_const, 1026 .data_bittiming_const = &pcan_usb_fd_data_const, 1027 1028 /* size of device private data */ 1029 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1030 1031 /* timestamps usage */ 1032 .ts_used_bits = 32, 1033 .ts_period = 1000000, /* calibration period in ts. */ 1034 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1035 .us_per_ts_shift = 0, 1036 1037 /* give here messages in/out endpoints */ 1038 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1039 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0}, 1040 1041 /* size of rx/tx usb buffers */ 1042 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1043 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1044 1045 /* device callbacks */ 1046 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1047 .dev_init = pcan_usb_fd_init, 1048 1049 .dev_exit = pcan_usb_fd_exit, 1050 .dev_free = pcan_usb_fd_free, 1051 .dev_set_bus = pcan_usb_fd_set_bus, 1052 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1053 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1054 .dev_decode_buf = pcan_usb_fd_decode_buf, 1055 .dev_start = pcan_usb_fd_start, 1056 .dev_stop = pcan_usb_fd_stop, 1057 .dev_restart_async = pcan_usb_fd_restart_async, 1058 .dev_encode_msg = pcan_usb_fd_encode_msg, 1059 1060 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1061 }; 1062 1063 /* describes the PCAN-CHIP USB */ 1064 static const struct can_bittiming_const pcan_usb_chip_const = { 1065 .name = "pcan_chip_usb", 1066 .tseg1_min = 1, 1067 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 1068 .tseg2_min = 1, 1069 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 1070 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 1071 .brp_min = 1, 1072 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1073 .brp_inc = 1, 1074 }; 1075 1076 static const struct can_bittiming_const pcan_usb_chip_data_const = { 1077 .name = "pcan_chip_usb", 1078 .tseg1_min = 1, 1079 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1080 .tseg2_min = 1, 1081 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1082 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1083 .brp_min = 1, 1084 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1085 .brp_inc = 1, 1086 }; 1087 1088 const struct peak_usb_adapter pcan_usb_chip = { 1089 .name = "PCAN-Chip USB", 1090 .device_id = PCAN_USBCHIP_PRODUCT_ID, 1091 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT, 1092 .ctrlmode_supported = CAN_CTRLMODE_FD | 1093 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY, 1094 .clock = { 1095 .freq = PCAN_UFD_CRYSTAL_HZ, 1096 }, 1097 .bittiming_const = &pcan_usb_chip_const, 1098 .data_bittiming_const = &pcan_usb_chip_data_const, 1099 1100 /* size of device private data */ 1101 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1102 1103 /* timestamps usage */ 1104 .ts_used_bits = 32, 1105 .ts_period = 1000000, /* calibration period in ts. */ 1106 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1107 .us_per_ts_shift = 0, 1108 1109 /* give here messages in/out endpoints */ 1110 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1111 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0}, 1112 1113 /* size of rx/tx usb buffers */ 1114 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1115 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1116 1117 /* device callbacks */ 1118 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1119 .dev_init = pcan_usb_fd_init, 1120 1121 .dev_exit = pcan_usb_fd_exit, 1122 .dev_free = pcan_usb_fd_free, 1123 .dev_set_bus = pcan_usb_fd_set_bus, 1124 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1125 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1126 .dev_decode_buf = pcan_usb_fd_decode_buf, 1127 .dev_start = pcan_usb_fd_start, 1128 .dev_stop = pcan_usb_fd_stop, 1129 .dev_restart_async = pcan_usb_fd_restart_async, 1130 .dev_encode_msg = pcan_usb_fd_encode_msg, 1131 1132 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1133 }; 1134 1135 /* describes the PCAN-USB Pro FD adapter */ 1136 static const struct can_bittiming_const pcan_usb_pro_fd_const = { 1137 .name = "pcan_usb_pro_fd", 1138 .tseg1_min = 1, 1139 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 1140 .tseg2_min = 1, 1141 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 1142 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 1143 .brp_min = 1, 1144 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1145 .brp_inc = 1, 1146 }; 1147 1148 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = { 1149 .name = "pcan_usb_pro_fd", 1150 .tseg1_min = 1, 1151 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1152 .tseg2_min = 1, 1153 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1154 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1155 .brp_min = 1, 1156 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1157 .brp_inc = 1, 1158 }; 1159 1160 const struct peak_usb_adapter pcan_usb_pro_fd = { 1161 .name = "PCAN-USB Pro FD", 1162 .device_id = PCAN_USBPROFD_PRODUCT_ID, 1163 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT, 1164 .ctrlmode_supported = CAN_CTRLMODE_FD | 1165 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY, 1166 .clock = { 1167 .freq = PCAN_UFD_CRYSTAL_HZ, 1168 }, 1169 .bittiming_const = &pcan_usb_pro_fd_const, 1170 .data_bittiming_const = &pcan_usb_pro_fd_data_const, 1171 1172 /* size of device private data */ 1173 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1174 1175 /* timestamps usage */ 1176 .ts_used_bits = 32, 1177 .ts_period = 1000000, /* calibration period in ts. */ 1178 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1179 .us_per_ts_shift = 0, 1180 1181 /* give here messages in/out endpoints */ 1182 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1183 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1}, 1184 1185 /* size of rx/tx usb buffers */ 1186 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1187 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1188 1189 /* device callbacks */ 1190 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1191 .dev_init = pcan_usb_fd_init, 1192 1193 .dev_exit = pcan_usb_fd_exit, 1194 .dev_free = pcan_usb_fd_free, 1195 .dev_set_bus = pcan_usb_fd_set_bus, 1196 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1197 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1198 .dev_decode_buf = pcan_usb_fd_decode_buf, 1199 .dev_start = pcan_usb_fd_start, 1200 .dev_stop = pcan_usb_fd_stop, 1201 .dev_restart_async = pcan_usb_fd_restart_async, 1202 .dev_encode_msg = pcan_usb_fd_encode_msg, 1203 1204 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1205 }; 1206 1207 /* describes the PCAN-USB X6 adapter */ 1208 static const struct can_bittiming_const pcan_usb_x6_const = { 1209 .name = "pcan_usb_x6", 1210 .tseg1_min = 1, 1211 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 1212 .tseg2_min = 1, 1213 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 1214 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 1215 .brp_min = 1, 1216 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1217 .brp_inc = 1, 1218 }; 1219 1220 static const struct can_bittiming_const pcan_usb_x6_data_const = { 1221 .name = "pcan_usb_x6", 1222 .tseg1_min = 1, 1223 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1224 .tseg2_min = 1, 1225 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1226 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1227 .brp_min = 1, 1228 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1229 .brp_inc = 1, 1230 }; 1231 1232 const struct peak_usb_adapter pcan_usb_x6 = { 1233 .name = "PCAN-USB X6", 1234 .device_id = PCAN_USBX6_PRODUCT_ID, 1235 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT, 1236 .ctrlmode_supported = CAN_CTRLMODE_FD | 1237 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY, 1238 .clock = { 1239 .freq = PCAN_UFD_CRYSTAL_HZ, 1240 }, 1241 .bittiming_const = &pcan_usb_x6_const, 1242 .data_bittiming_const = &pcan_usb_x6_data_const, 1243 1244 /* size of device private data */ 1245 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1246 1247 /* timestamps usage */ 1248 .ts_used_bits = 32, 1249 .ts_period = 1000000, /* calibration period in ts. */ 1250 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1251 .us_per_ts_shift = 0, 1252 1253 /* give here messages in/out endpoints */ 1254 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1255 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1}, 1256 1257 /* size of rx/tx usb buffers */ 1258 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1259 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1260 1261 /* device callbacks */ 1262 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1263 .dev_init = pcan_usb_fd_init, 1264 1265 .dev_exit = pcan_usb_fd_exit, 1266 .dev_free = pcan_usb_fd_free, 1267 .dev_set_bus = pcan_usb_fd_set_bus, 1268 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1269 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1270 .dev_decode_buf = pcan_usb_fd_decode_buf, 1271 .dev_start = pcan_usb_fd_start, 1272 .dev_stop = pcan_usb_fd_stop, 1273 .dev_restart_async = pcan_usb_fd_restart_async, 1274 .dev_encode_msg = pcan_usb_fd_encode_msg, 1275 1276 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1277 }; 1278