1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter 4 * 5 * Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com> 6 */ 7 #include <linux/netdevice.h> 8 #include <linux/usb.h> 9 #include <linux/module.h> 10 11 #include <linux/can.h> 12 #include <linux/can/dev.h> 13 #include <linux/can/error.h> 14 #include <linux/can/dev/peak_canfd.h> 15 16 #include "pcan_usb_core.h" 17 #include "pcan_usb_pro.h" 18 19 #define PCAN_USBPROFD_CHANNEL_COUNT 2 20 #define PCAN_USBFD_CHANNEL_COUNT 1 21 22 /* PCAN-USB Pro FD adapter internal clock (Hz) */ 23 #define PCAN_UFD_CRYSTAL_HZ 80000000 24 25 #define PCAN_UFD_CMD_BUFFER_SIZE 512 26 #define PCAN_UFD_LOSPD_PKT_SIZE 64 27 28 /* PCAN-USB Pro FD command timeout (ms.) */ 29 #define PCAN_UFD_CMD_TIMEOUT_MS 1000 30 31 /* PCAN-USB Pro FD rx/tx buffers size */ 32 #define PCAN_UFD_RX_BUFFER_SIZE 2048 33 #define PCAN_UFD_TX_BUFFER_SIZE 512 34 35 /* read some versions info from the hw device */ 36 struct __packed pcan_ufd_fw_info { 37 __le16 size_of; /* sizeof this */ 38 __le16 type; /* type of this structure */ 39 u8 hw_type; /* Type of hardware (HW_TYPE_xxx) */ 40 u8 bl_version[3]; /* Bootloader version */ 41 u8 hw_version; /* Hardware version (PCB) */ 42 u8 fw_version[3]; /* Firmware version */ 43 __le32 dev_id[2]; /* "device id" per CAN */ 44 __le32 ser_no; /* S/N */ 45 __le32 flags; /* special functions */ 46 }; 47 48 /* handle device specific info used by the netdevices */ 49 struct pcan_usb_fd_if { 50 struct peak_usb_device *dev[PCAN_USB_MAX_CHANNEL]; 51 struct pcan_ufd_fw_info fw_info; 52 struct peak_time_ref time_ref; 53 int cm_ignore_count; 54 int dev_opened_count; 55 }; 56 57 /* device information */ 58 struct pcan_usb_fd_device { 59 struct peak_usb_device dev; 60 struct can_berr_counter bec; 61 struct pcan_usb_fd_if *usb_if; 62 u8 *cmd_buffer_addr; 63 }; 64 65 /* Extended USB commands (non uCAN commands) */ 66 67 /* Clock Modes command */ 68 #define PCAN_UFD_CMD_CLK_SET 0x80 69 70 #define PCAN_UFD_CLK_80MHZ 0x0 71 #define PCAN_UFD_CLK_60MHZ 0x1 72 #define PCAN_UFD_CLK_40MHZ 0x2 73 #define PCAN_UFD_CLK_30MHZ 0x3 74 #define PCAN_UFD_CLK_24MHZ 0x4 75 #define PCAN_UFD_CLK_20MHZ 0x5 76 #define PCAN_UFD_CLK_DEF PCAN_UFD_CLK_80MHZ 77 78 struct __packed pcan_ufd_clock { 79 __le16 opcode_channel; 80 81 u8 mode; 82 u8 unused[5]; 83 }; 84 85 /* LED control command */ 86 #define PCAN_UFD_CMD_LED_SET 0x86 87 88 #define PCAN_UFD_LED_DEV 0x00 89 #define PCAN_UFD_LED_FAST 0x01 90 #define PCAN_UFD_LED_SLOW 0x02 91 #define PCAN_UFD_LED_ON 0x03 92 #define PCAN_UFD_LED_OFF 0x04 93 #define PCAN_UFD_LED_DEF PCAN_UFD_LED_DEV 94 95 struct __packed pcan_ufd_led { 96 __le16 opcode_channel; 97 98 u8 mode; 99 u8 unused[5]; 100 }; 101 102 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */ 103 #define PCAN_UFD_FLTEXT_CALIBRATION 0x8000 104 105 struct __packed pcan_ufd_options { 106 __le16 opcode_channel; 107 108 __le16 ucan_mask; 109 u16 unused; 110 __le16 usb_mask; 111 }; 112 113 /* Extended usage of uCAN messages for PCAN-USB Pro FD */ 114 #define PCAN_UFD_MSG_CALIBRATION 0x100 115 116 struct __packed pcan_ufd_ts_msg { 117 __le16 size; 118 __le16 type; 119 __le32 ts_low; 120 __le32 ts_high; 121 __le16 usb_frame_index; 122 u16 unused; 123 }; 124 125 #define PCAN_UFD_MSG_OVERRUN 0x101 126 127 #define PCAN_UFD_OVMSG_CHANNEL(o) ((o)->channel & 0xf) 128 129 struct __packed pcan_ufd_ovr_msg { 130 __le16 size; 131 __le16 type; 132 __le32 ts_low; 133 __le32 ts_high; 134 u8 channel; 135 u8 unused[3]; 136 }; 137 138 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om) 139 { 140 return om->channel & 0xf; 141 } 142 143 /* Clock mode frequency values */ 144 static const u32 pcan_usb_fd_clk_freq[6] = { 145 [PCAN_UFD_CLK_80MHZ] = 80000000, 146 [PCAN_UFD_CLK_60MHZ] = 60000000, 147 [PCAN_UFD_CLK_40MHZ] = 40000000, 148 [PCAN_UFD_CLK_30MHZ] = 30000000, 149 [PCAN_UFD_CLK_24MHZ] = 24000000, 150 [PCAN_UFD_CLK_20MHZ] = 20000000 151 }; 152 153 /* return a device USB interface */ 154 static inline 155 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev) 156 { 157 struct pcan_usb_fd_device *pdev = 158 container_of(dev, struct pcan_usb_fd_device, dev); 159 return pdev->usb_if; 160 } 161 162 /* return a device USB commands buffer */ 163 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev) 164 { 165 struct pcan_usb_fd_device *pdev = 166 container_of(dev, struct pcan_usb_fd_device, dev); 167 return pdev->cmd_buffer_addr; 168 } 169 170 /* send PCAN-USB Pro FD commands synchronously */ 171 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail) 172 { 173 void *cmd_head = pcan_usb_fd_cmd_buffer(dev); 174 int err = 0; 175 u8 *packet_ptr; 176 int packet_len; 177 ptrdiff_t cmd_len; 178 179 /* usb device unregistered? */ 180 if (!(dev->state & PCAN_USB_STATE_CONNECTED)) 181 return 0; 182 183 /* if a packet is not filled completely by commands, the command list 184 * is terminated with an "end of collection" record. 185 */ 186 cmd_len = cmd_tail - cmd_head; 187 if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) { 188 memset(cmd_tail, 0xff, sizeof(u64)); 189 cmd_len += sizeof(u64); 190 } 191 192 packet_ptr = cmd_head; 193 packet_len = cmd_len; 194 195 /* firmware is not able to re-assemble 512 bytes buffer in full-speed */ 196 if (unlikely(dev->udev->speed != USB_SPEED_HIGH)) 197 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE); 198 199 do { 200 err = usb_bulk_msg(dev->udev, 201 usb_sndbulkpipe(dev->udev, 202 PCAN_USBPRO_EP_CMDOUT), 203 packet_ptr, packet_len, 204 NULL, PCAN_UFD_CMD_TIMEOUT_MS); 205 if (err) { 206 netdev_err(dev->netdev, 207 "sending command failure: %d\n", err); 208 break; 209 } 210 211 packet_ptr += packet_len; 212 cmd_len -= packet_len; 213 214 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE) 215 packet_len = cmd_len; 216 217 } while (packet_len > 0); 218 219 return err; 220 } 221 222 /* build the commands list in the given buffer, to enter operational mode */ 223 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf) 224 { 225 struct pucan_wr_err_cnt *prc; 226 struct pucan_command *cmd; 227 u8 *pc = buf; 228 229 /* 1st, reset error counters: */ 230 prc = (struct pucan_wr_err_cnt *)pc; 231 prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 232 PUCAN_CMD_WR_ERR_CNT); 233 234 /* select both counters */ 235 prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE); 236 237 /* and reset their values */ 238 prc->tx_counter = 0; 239 prc->rx_counter = 0; 240 241 /* moves the pointer forward */ 242 pc += sizeof(struct pucan_wr_err_cnt); 243 244 /* add command to switch from ISO to non-ISO mode, if fw allows it */ 245 if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) { 246 struct pucan_options *puo = (struct pucan_options *)pc; 247 248 puo->opcode_channel = 249 (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ? 250 pucan_cmd_opcode_channel(dev->ctrl_idx, 251 PUCAN_CMD_CLR_DIS_OPTION) : 252 pucan_cmd_opcode_channel(dev->ctrl_idx, 253 PUCAN_CMD_SET_EN_OPTION); 254 255 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO); 256 257 /* to be sure that no other extended bits will be taken into 258 * account 259 */ 260 puo->unused = 0; 261 262 /* moves the pointer forward */ 263 pc += sizeof(struct pucan_options); 264 } 265 266 /* next, go back to operational mode */ 267 cmd = (struct pucan_command *)pc; 268 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 269 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ? 270 PUCAN_CMD_LISTEN_ONLY_MODE : 271 PUCAN_CMD_NORMAL_MODE); 272 pc += sizeof(struct pucan_command); 273 274 return pc - buf; 275 } 276 277 /* set CAN bus on/off */ 278 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff) 279 { 280 u8 *pc = pcan_usb_fd_cmd_buffer(dev); 281 int l; 282 283 if (onoff) { 284 /* build the cmds list to enter operational mode */ 285 l = pcan_usb_fd_build_restart_cmd(dev, pc); 286 } else { 287 struct pucan_command *cmd = (struct pucan_command *)pc; 288 289 /* build cmd to go back to reset mode */ 290 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 291 PUCAN_CMD_RESET_MODE); 292 l = sizeof(struct pucan_command); 293 } 294 295 /* send the command */ 296 return pcan_usb_fd_send_cmd(dev, pc + l); 297 } 298 299 /* set filtering masks: 300 * 301 * idx in range [0..63] selects a row #idx, all rows otherwise 302 * mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s) 303 * 304 * Each bit of this 64 x 32 bits array defines a CANID value: 305 * 306 * bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while 307 * bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded. 308 */ 309 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx, 310 u32 mask) 311 { 312 struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev); 313 int i, n; 314 315 /* select all rows when idx is out of range [0..63] */ 316 if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) { 317 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS; 318 idx = 0; 319 320 /* select the row (and only the row) otherwise */ 321 } else { 322 n = idx + 1; 323 } 324 325 for (i = idx; i < n; i++, cmd++) { 326 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 327 PUCAN_CMD_FILTER_STD); 328 cmd->idx = cpu_to_le16(i); 329 cmd->mask = cpu_to_le32(mask); 330 } 331 332 /* send the command */ 333 return pcan_usb_fd_send_cmd(dev, cmd); 334 } 335 336 /* set/unset options 337 * 338 * onoff set(1)/unset(0) options 339 * mask each bit defines a kind of options to set/unset 340 */ 341 static int pcan_usb_fd_set_options(struct peak_usb_device *dev, 342 bool onoff, u16 ucan_mask, u16 usb_mask) 343 { 344 struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev); 345 346 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 347 (onoff) ? PUCAN_CMD_SET_EN_OPTION : 348 PUCAN_CMD_CLR_DIS_OPTION); 349 350 cmd->ucan_mask = cpu_to_le16(ucan_mask); 351 cmd->usb_mask = cpu_to_le16(usb_mask); 352 353 /* send the command */ 354 return pcan_usb_fd_send_cmd(dev, ++cmd); 355 } 356 357 /* setup LED control */ 358 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode) 359 { 360 struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev); 361 362 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 363 PCAN_UFD_CMD_LED_SET); 364 cmd->mode = led_mode; 365 366 /* send the command */ 367 return pcan_usb_fd_send_cmd(dev, ++cmd); 368 } 369 370 /* set CAN clock domain */ 371 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev, 372 u8 clk_mode) 373 { 374 struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev); 375 376 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 377 PCAN_UFD_CMD_CLK_SET); 378 cmd->mode = clk_mode; 379 380 /* send the command */ 381 return pcan_usb_fd_send_cmd(dev, ++cmd); 382 } 383 384 /* set bittiming for CAN and CAN-FD header */ 385 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev, 386 struct can_bittiming *bt) 387 { 388 struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev); 389 390 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 391 PUCAN_CMD_TIMING_SLOW); 392 cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1, 393 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES); 394 395 cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1); 396 cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1); 397 cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1)); 398 399 cmd->ewl = 96; /* default */ 400 401 /* send the command */ 402 return pcan_usb_fd_send_cmd(dev, ++cmd); 403 } 404 405 /* set CAN-FD bittiming for data */ 406 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev, 407 struct can_bittiming *bt) 408 { 409 struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev); 410 411 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 412 PUCAN_CMD_TIMING_FAST); 413 cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1); 414 cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1); 415 cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1); 416 cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1)); 417 418 /* send the command */ 419 return pcan_usb_fd_send_cmd(dev, ++cmd); 420 } 421 422 /* handle restart but in asynchronously way 423 * (uses PCAN-USB Pro code to complete asynchronous request) 424 */ 425 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev, 426 struct urb *urb, u8 *buf) 427 { 428 u8 *pc = buf; 429 430 /* build the entire cmds list in the provided buffer, to go back into 431 * operational mode. 432 */ 433 pc += pcan_usb_fd_build_restart_cmd(dev, pc); 434 435 /* add EOC */ 436 memset(pc, 0xff, sizeof(struct pucan_command)); 437 pc += sizeof(struct pucan_command); 438 439 /* complete the URB */ 440 usb_fill_bulk_urb(urb, dev->udev, 441 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT), 442 buf, pc - buf, 443 pcan_usb_pro_restart_complete, dev); 444 445 /* and submit it. */ 446 return usb_submit_urb(urb, GFP_ATOMIC); 447 } 448 449 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded) 450 { 451 struct pcan_usb_fd_device *pdev = 452 container_of(dev, struct pcan_usb_fd_device, dev); 453 454 pdev->cmd_buffer_addr[0] = 0; 455 pdev->cmd_buffer_addr[1] = !!loaded; 456 457 return pcan_usb_pro_send_req(dev, 458 PCAN_USBPRO_REQ_FCT, 459 PCAN_USBPRO_FCT_DRVLD, 460 pdev->cmd_buffer_addr, 461 PCAN_USBPRO_FCT_DRVLD_REQ_LEN); 462 } 463 464 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if, 465 struct pucan_msg *rx_msg) 466 { 467 struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg; 468 struct peak_usb_device *dev; 469 struct net_device *netdev; 470 struct canfd_frame *cfd; 471 struct sk_buff *skb; 472 const u16 rx_msg_flags = le16_to_cpu(rm->flags); 473 474 if (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev)) 475 return -ENOMEM; 476 477 dev = usb_if->dev[pucan_msg_get_channel(rm)]; 478 netdev = dev->netdev; 479 480 if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) { 481 /* CANFD frame case */ 482 skb = alloc_canfd_skb(netdev, &cfd); 483 if (!skb) 484 return -ENOMEM; 485 486 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH) 487 cfd->flags |= CANFD_BRS; 488 489 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND) 490 cfd->flags |= CANFD_ESI; 491 492 cfd->len = can_fd_dlc2len(pucan_msg_get_dlc(rm)); 493 } else { 494 /* CAN 2.0 frame case */ 495 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd); 496 if (!skb) 497 return -ENOMEM; 498 499 can_frame_set_cc_len((struct can_frame *)cfd, 500 pucan_msg_get_dlc(rm), 501 dev->can.ctrlmode); 502 } 503 504 cfd->can_id = le32_to_cpu(rm->can_id); 505 506 if (rx_msg_flags & PUCAN_MSG_EXT_ID) 507 cfd->can_id |= CAN_EFF_FLAG; 508 509 if (rx_msg_flags & PUCAN_MSG_RTR) 510 cfd->can_id |= CAN_RTR_FLAG; 511 else 512 memcpy(cfd->data, rm->d, cfd->len); 513 514 netdev->stats.rx_packets++; 515 netdev->stats.rx_bytes += cfd->len; 516 517 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low)); 518 519 return 0; 520 } 521 522 /* handle uCAN status message */ 523 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if, 524 struct pucan_msg *rx_msg) 525 { 526 struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg; 527 struct pcan_usb_fd_device *pdev; 528 enum can_state new_state = CAN_STATE_ERROR_ACTIVE; 529 enum can_state rx_state, tx_state; 530 struct peak_usb_device *dev; 531 struct net_device *netdev; 532 struct can_frame *cf; 533 struct sk_buff *skb; 534 535 if (pucan_stmsg_get_channel(sm) >= ARRAY_SIZE(usb_if->dev)) 536 return -ENOMEM; 537 538 dev = usb_if->dev[pucan_stmsg_get_channel(sm)]; 539 pdev = container_of(dev, struct pcan_usb_fd_device, dev); 540 netdev = dev->netdev; 541 542 /* nothing should be sent while in BUS_OFF state */ 543 if (dev->can.state == CAN_STATE_BUS_OFF) 544 return 0; 545 546 if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) { 547 new_state = CAN_STATE_BUS_OFF; 548 } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) { 549 new_state = CAN_STATE_ERROR_PASSIVE; 550 } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) { 551 new_state = CAN_STATE_ERROR_WARNING; 552 } else { 553 /* no error bit (so, no error skb, back to active state) */ 554 dev->can.state = CAN_STATE_ERROR_ACTIVE; 555 pdev->bec.txerr = 0; 556 pdev->bec.rxerr = 0; 557 return 0; 558 } 559 560 /* state hasn't changed */ 561 if (new_state == dev->can.state) 562 return 0; 563 564 /* handle bus state change */ 565 tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0; 566 rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0; 567 568 /* allocate an skb to store the error frame */ 569 skb = alloc_can_err_skb(netdev, &cf); 570 if (skb) 571 can_change_state(netdev, cf, tx_state, rx_state); 572 573 /* things must be done even in case of OOM */ 574 if (new_state == CAN_STATE_BUS_OFF) 575 can_bus_off(netdev); 576 577 if (!skb) 578 return -ENOMEM; 579 580 netdev->stats.rx_packets++; 581 netdev->stats.rx_bytes += cf->len; 582 583 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low)); 584 585 return 0; 586 } 587 588 /* handle uCAN error message */ 589 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if, 590 struct pucan_msg *rx_msg) 591 { 592 struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg; 593 struct pcan_usb_fd_device *pdev; 594 struct peak_usb_device *dev; 595 596 if (pucan_ermsg_get_channel(er) >= ARRAY_SIZE(usb_if->dev)) 597 return -EINVAL; 598 599 dev = usb_if->dev[pucan_ermsg_get_channel(er)]; 600 pdev = container_of(dev, struct pcan_usb_fd_device, dev); 601 602 /* keep a trace of tx and rx error counters for later use */ 603 pdev->bec.txerr = er->tx_err_cnt; 604 pdev->bec.rxerr = er->rx_err_cnt; 605 606 return 0; 607 } 608 609 /* handle uCAN overrun message */ 610 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if, 611 struct pucan_msg *rx_msg) 612 { 613 struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg; 614 struct peak_usb_device *dev; 615 struct net_device *netdev; 616 struct can_frame *cf; 617 struct sk_buff *skb; 618 619 if (pufd_omsg_get_channel(ov) >= ARRAY_SIZE(usb_if->dev)) 620 return -EINVAL; 621 622 dev = usb_if->dev[pufd_omsg_get_channel(ov)]; 623 netdev = dev->netdev; 624 625 /* allocate an skb to store the error frame */ 626 skb = alloc_can_err_skb(netdev, &cf); 627 if (!skb) 628 return -ENOMEM; 629 630 cf->can_id |= CAN_ERR_CRTL; 631 cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW; 632 633 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low)); 634 635 netdev->stats.rx_over_errors++; 636 netdev->stats.rx_errors++; 637 638 return 0; 639 } 640 641 /* handle USB calibration message */ 642 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if, 643 struct pucan_msg *rx_msg) 644 { 645 struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg; 646 647 /* should wait until clock is stabilized */ 648 if (usb_if->cm_ignore_count > 0) 649 usb_if->cm_ignore_count--; 650 else 651 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low)); 652 } 653 654 /* callback for bulk IN urb */ 655 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb) 656 { 657 struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev); 658 struct net_device *netdev = dev->netdev; 659 struct pucan_msg *rx_msg; 660 u8 *msg_ptr, *msg_end; 661 int err = 0; 662 663 /* loop reading all the records from the incoming message */ 664 msg_ptr = urb->transfer_buffer; 665 msg_end = urb->transfer_buffer + urb->actual_length; 666 for (; msg_ptr < msg_end;) { 667 u16 rx_msg_type, rx_msg_size; 668 669 rx_msg = (struct pucan_msg *)msg_ptr; 670 if (!rx_msg->size) { 671 /* null packet found: end of list */ 672 break; 673 } 674 675 rx_msg_size = le16_to_cpu(rx_msg->size); 676 rx_msg_type = le16_to_cpu(rx_msg->type); 677 678 /* check if the record goes out of current packet */ 679 if (msg_ptr + rx_msg_size > msg_end) { 680 netdev_err(netdev, 681 "got frag rec: should inc usb rx buf sze\n"); 682 err = -EBADMSG; 683 break; 684 } 685 686 switch (rx_msg_type) { 687 case PUCAN_MSG_CAN_RX: 688 err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg); 689 if (err < 0) 690 goto fail; 691 break; 692 693 case PCAN_UFD_MSG_CALIBRATION: 694 pcan_usb_fd_decode_ts(usb_if, rx_msg); 695 break; 696 697 case PUCAN_MSG_ERROR: 698 err = pcan_usb_fd_decode_error(usb_if, rx_msg); 699 if (err < 0) 700 goto fail; 701 break; 702 703 case PUCAN_MSG_STATUS: 704 err = pcan_usb_fd_decode_status(usb_if, rx_msg); 705 if (err < 0) 706 goto fail; 707 break; 708 709 case PCAN_UFD_MSG_OVERRUN: 710 err = pcan_usb_fd_decode_overrun(usb_if, rx_msg); 711 if (err < 0) 712 goto fail; 713 break; 714 715 default: 716 netdev_err(netdev, 717 "unhandled msg type 0x%02x (%d): ignored\n", 718 rx_msg_type, rx_msg_type); 719 break; 720 } 721 722 msg_ptr += rx_msg_size; 723 } 724 725 fail: 726 if (err) 727 pcan_dump_mem("received msg", 728 urb->transfer_buffer, urb->actual_length); 729 return err; 730 } 731 732 /* CAN/CANFD frames encoding callback */ 733 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev, 734 struct sk_buff *skb, u8 *obuf, size_t *size) 735 { 736 struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf; 737 struct canfd_frame *cfd = (struct canfd_frame *)skb->data; 738 u16 tx_msg_size, tx_msg_flags; 739 u8 dlc; 740 741 if (cfd->len > CANFD_MAX_DLEN) 742 return -EINVAL; 743 744 tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4); 745 tx_msg->size = cpu_to_le16(tx_msg_size); 746 tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX); 747 748 tx_msg_flags = 0; 749 if (cfd->can_id & CAN_EFF_FLAG) { 750 tx_msg_flags |= PUCAN_MSG_EXT_ID; 751 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK); 752 } else { 753 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK); 754 } 755 756 if (can_is_canfd_skb(skb)) { 757 /* considering a CANFD frame */ 758 dlc = can_fd_len2dlc(cfd->len); 759 760 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN; 761 762 if (cfd->flags & CANFD_BRS) 763 tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH; 764 765 if (cfd->flags & CANFD_ESI) 766 tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND; 767 } else { 768 /* CAND 2.0 frames */ 769 dlc = can_get_cc_dlc((struct can_frame *)cfd, 770 dev->can.ctrlmode); 771 772 if (cfd->can_id & CAN_RTR_FLAG) 773 tx_msg_flags |= PUCAN_MSG_RTR; 774 } 775 776 tx_msg->flags = cpu_to_le16(tx_msg_flags); 777 tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, dlc); 778 memcpy(tx_msg->d, cfd->data, cfd->len); 779 780 /* add null size message to tag the end (messages are 32-bits aligned) 781 */ 782 tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size); 783 784 tx_msg->size = 0; 785 786 /* set the whole size of the USB packet to send */ 787 *size = tx_msg_size + sizeof(u32); 788 789 return 0; 790 } 791 792 /* start the interface (last chance before set bus on) */ 793 static int pcan_usb_fd_start(struct peak_usb_device *dev) 794 { 795 struct pcan_usb_fd_device *pdev = 796 container_of(dev, struct pcan_usb_fd_device, dev); 797 int err; 798 799 /* set filter mode: all acceptance */ 800 err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff); 801 if (err) 802 return err; 803 804 /* opening first device: */ 805 if (pdev->usb_if->dev_opened_count == 0) { 806 /* reset time_ref */ 807 peak_usb_init_time_ref(&pdev->usb_if->time_ref, 808 &pcan_usb_pro_fd); 809 810 /* enable USB calibration messages */ 811 err = pcan_usb_fd_set_options(dev, 1, 812 PUCAN_OPTION_ERROR, 813 PCAN_UFD_FLTEXT_CALIBRATION); 814 } 815 816 pdev->usb_if->dev_opened_count++; 817 818 /* reset cached error counters */ 819 pdev->bec.txerr = 0; 820 pdev->bec.rxerr = 0; 821 822 return err; 823 } 824 825 /* socket callback used to copy berr counters values received through USB */ 826 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev, 827 struct can_berr_counter *bec) 828 { 829 struct peak_usb_device *dev = netdev_priv(netdev); 830 struct pcan_usb_fd_device *pdev = 831 container_of(dev, struct pcan_usb_fd_device, dev); 832 833 *bec = pdev->bec; 834 835 /* must return 0 */ 836 return 0; 837 } 838 839 /* stop interface (last chance before set bus off) */ 840 static int pcan_usb_fd_stop(struct peak_usb_device *dev) 841 { 842 struct pcan_usb_fd_device *pdev = 843 container_of(dev, struct pcan_usb_fd_device, dev); 844 845 /* turn off special msgs for that interface if no other dev opened */ 846 if (pdev->usb_if->dev_opened_count == 1) 847 pcan_usb_fd_set_options(dev, 0, 848 PUCAN_OPTION_ERROR, 849 PCAN_UFD_FLTEXT_CALIBRATION); 850 pdev->usb_if->dev_opened_count--; 851 852 return 0; 853 } 854 855 /* called when probing, to initialize a device object */ 856 static int pcan_usb_fd_init(struct peak_usb_device *dev) 857 { 858 struct pcan_usb_fd_device *pdev = 859 container_of(dev, struct pcan_usb_fd_device, dev); 860 int i, err = -ENOMEM; 861 862 /* do this for 1st channel only */ 863 if (!dev->prev_siblings) { 864 /* allocate netdevices common structure attached to first one */ 865 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL); 866 if (!pdev->usb_if) 867 goto err_out; 868 869 /* allocate command buffer once for all for the interface */ 870 pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE, 871 GFP_KERNEL); 872 if (!pdev->cmd_buffer_addr) 873 goto err_out_1; 874 875 /* number of ts msgs to ignore before taking one into account */ 876 pdev->usb_if->cm_ignore_count = 5; 877 878 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO, 879 PCAN_USBPRO_INFO_FW, 880 &pdev->usb_if->fw_info, 881 sizeof(pdev->usb_if->fw_info)); 882 if (err) { 883 dev_err(dev->netdev->dev.parent, 884 "unable to read %s firmware info (err %d)\n", 885 dev->adapter->name, err); 886 goto err_out_2; 887 } 888 889 /* explicit use of dev_xxx() instead of netdev_xxx() here: 890 * information displayed are related to the device itself, not 891 * to the canx (channel) device. 892 */ 893 dev_info(dev->netdev->dev.parent, 894 "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n", 895 dev->adapter->name, pdev->usb_if->fw_info.hw_version, 896 pdev->usb_if->fw_info.fw_version[0], 897 pdev->usb_if->fw_info.fw_version[1], 898 pdev->usb_if->fw_info.fw_version[2], 899 dev->adapter->ctrl_count); 900 901 /* check for ability to switch between ISO/non-ISO modes */ 902 if (pdev->usb_if->fw_info.fw_version[0] >= 2) { 903 /* firmware >= 2.x supports ISO/non-ISO switching */ 904 dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO; 905 } else { 906 /* firmware < 2.x only supports fixed(!) non-ISO */ 907 dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO; 908 } 909 910 /* tell the hardware the can driver is running */ 911 err = pcan_usb_fd_drv_loaded(dev, 1); 912 if (err) { 913 dev_err(dev->netdev->dev.parent, 914 "unable to tell %s driver is loaded (err %d)\n", 915 dev->adapter->name, err); 916 goto err_out_2; 917 } 918 } else { 919 /* otherwise, simply copy previous sibling's values */ 920 struct pcan_usb_fd_device *ppdev = 921 container_of(dev->prev_siblings, 922 struct pcan_usb_fd_device, dev); 923 924 pdev->usb_if = ppdev->usb_if; 925 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr; 926 927 /* do a copy of the ctrlmode[_supported] too */ 928 dev->can.ctrlmode = ppdev->dev.can.ctrlmode; 929 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported; 930 } 931 932 pdev->usb_if->dev[dev->ctrl_idx] = dev; 933 dev->device_number = 934 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]); 935 936 /* set clock domain */ 937 for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++) 938 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i]) 939 break; 940 941 if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) { 942 dev_warn(dev->netdev->dev.parent, 943 "incompatible clock frequencies\n"); 944 err = -EINVAL; 945 goto err_out_2; 946 } 947 948 pcan_usb_fd_set_clock_domain(dev, i); 949 950 /* set LED in default state (end of init phase) */ 951 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF); 952 953 return 0; 954 955 err_out_2: 956 kfree(pdev->cmd_buffer_addr); 957 err_out_1: 958 kfree(pdev->usb_if); 959 err_out: 960 return err; 961 } 962 963 /* called when driver module is being unloaded */ 964 static void pcan_usb_fd_exit(struct peak_usb_device *dev) 965 { 966 struct pcan_usb_fd_device *pdev = 967 container_of(dev, struct pcan_usb_fd_device, dev); 968 969 /* when rmmod called before unplug and if down, should reset things 970 * before leaving 971 */ 972 if (dev->can.state != CAN_STATE_STOPPED) { 973 /* set bus off on the corresponding channel */ 974 pcan_usb_fd_set_bus(dev, 0); 975 } 976 977 /* switch off corresponding CAN LEDs */ 978 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF); 979 980 /* if channel #0 (only) */ 981 if (dev->ctrl_idx == 0) { 982 /* turn off calibration message if any device were opened */ 983 if (pdev->usb_if->dev_opened_count > 0) 984 pcan_usb_fd_set_options(dev, 0, 985 PUCAN_OPTION_ERROR, 986 PCAN_UFD_FLTEXT_CALIBRATION); 987 988 /* tell USB adapter that the driver is being unloaded */ 989 pcan_usb_fd_drv_loaded(dev, 0); 990 } 991 } 992 993 /* called when the USB adapter is unplugged */ 994 static void pcan_usb_fd_free(struct peak_usb_device *dev) 995 { 996 /* last device: can free shared objects now */ 997 if (!dev->prev_siblings && !dev->next_siblings) { 998 struct pcan_usb_fd_device *pdev = 999 container_of(dev, struct pcan_usb_fd_device, dev); 1000 1001 /* free commands buffer */ 1002 kfree(pdev->cmd_buffer_addr); 1003 1004 /* free usb interface object */ 1005 kfree(pdev->usb_if); 1006 } 1007 } 1008 1009 /* describes the PCAN-USB FD adapter */ 1010 static const struct can_bittiming_const pcan_usb_fd_const = { 1011 .name = "pcan_usb_fd", 1012 .tseg1_min = 1, 1013 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 1014 .tseg2_min = 1, 1015 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 1016 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 1017 .brp_min = 1, 1018 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1019 .brp_inc = 1, 1020 }; 1021 1022 static const struct can_bittiming_const pcan_usb_fd_data_const = { 1023 .name = "pcan_usb_fd", 1024 .tseg1_min = 1, 1025 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1026 .tseg2_min = 1, 1027 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1028 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1029 .brp_min = 1, 1030 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1031 .brp_inc = 1, 1032 }; 1033 1034 const struct peak_usb_adapter pcan_usb_fd = { 1035 .name = "PCAN-USB FD", 1036 .device_id = PCAN_USBFD_PRODUCT_ID, 1037 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT, 1038 .ctrlmode_supported = CAN_CTRLMODE_FD | 1039 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY | 1040 CAN_CTRLMODE_CC_LEN8_DLC, 1041 .clock = { 1042 .freq = PCAN_UFD_CRYSTAL_HZ, 1043 }, 1044 .bittiming_const = &pcan_usb_fd_const, 1045 .data_bittiming_const = &pcan_usb_fd_data_const, 1046 1047 /* size of device private data */ 1048 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1049 1050 /* timestamps usage */ 1051 .ts_used_bits = 32, 1052 .ts_period = 1000000, /* calibration period in ts. */ 1053 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1054 .us_per_ts_shift = 0, 1055 1056 /* give here messages in/out endpoints */ 1057 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1058 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0}, 1059 1060 /* size of rx/tx usb buffers */ 1061 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1062 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1063 1064 /* device callbacks */ 1065 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1066 .dev_init = pcan_usb_fd_init, 1067 1068 .dev_exit = pcan_usb_fd_exit, 1069 .dev_free = pcan_usb_fd_free, 1070 .dev_set_bus = pcan_usb_fd_set_bus, 1071 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1072 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1073 .dev_decode_buf = pcan_usb_fd_decode_buf, 1074 .dev_start = pcan_usb_fd_start, 1075 .dev_stop = pcan_usb_fd_stop, 1076 .dev_restart_async = pcan_usb_fd_restart_async, 1077 .dev_encode_msg = pcan_usb_fd_encode_msg, 1078 1079 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1080 }; 1081 1082 /* describes the PCAN-CHIP USB */ 1083 static const struct can_bittiming_const pcan_usb_chip_const = { 1084 .name = "pcan_chip_usb", 1085 .tseg1_min = 1, 1086 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 1087 .tseg2_min = 1, 1088 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 1089 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 1090 .brp_min = 1, 1091 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1092 .brp_inc = 1, 1093 }; 1094 1095 static const struct can_bittiming_const pcan_usb_chip_data_const = { 1096 .name = "pcan_chip_usb", 1097 .tseg1_min = 1, 1098 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1099 .tseg2_min = 1, 1100 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1101 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1102 .brp_min = 1, 1103 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1104 .brp_inc = 1, 1105 }; 1106 1107 const struct peak_usb_adapter pcan_usb_chip = { 1108 .name = "PCAN-Chip USB", 1109 .device_id = PCAN_USBCHIP_PRODUCT_ID, 1110 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT, 1111 .ctrlmode_supported = CAN_CTRLMODE_FD | 1112 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY | 1113 CAN_CTRLMODE_CC_LEN8_DLC, 1114 .clock = { 1115 .freq = PCAN_UFD_CRYSTAL_HZ, 1116 }, 1117 .bittiming_const = &pcan_usb_chip_const, 1118 .data_bittiming_const = &pcan_usb_chip_data_const, 1119 1120 /* size of device private data */ 1121 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1122 1123 /* timestamps usage */ 1124 .ts_used_bits = 32, 1125 .ts_period = 1000000, /* calibration period in ts. */ 1126 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1127 .us_per_ts_shift = 0, 1128 1129 /* give here messages in/out endpoints */ 1130 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1131 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0}, 1132 1133 /* size of rx/tx usb buffers */ 1134 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1135 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1136 1137 /* device callbacks */ 1138 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1139 .dev_init = pcan_usb_fd_init, 1140 1141 .dev_exit = pcan_usb_fd_exit, 1142 .dev_free = pcan_usb_fd_free, 1143 .dev_set_bus = pcan_usb_fd_set_bus, 1144 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1145 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1146 .dev_decode_buf = pcan_usb_fd_decode_buf, 1147 .dev_start = pcan_usb_fd_start, 1148 .dev_stop = pcan_usb_fd_stop, 1149 .dev_restart_async = pcan_usb_fd_restart_async, 1150 .dev_encode_msg = pcan_usb_fd_encode_msg, 1151 1152 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1153 }; 1154 1155 /* describes the PCAN-USB Pro FD adapter */ 1156 static const struct can_bittiming_const pcan_usb_pro_fd_const = { 1157 .name = "pcan_usb_pro_fd", 1158 .tseg1_min = 1, 1159 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 1160 .tseg2_min = 1, 1161 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 1162 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 1163 .brp_min = 1, 1164 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1165 .brp_inc = 1, 1166 }; 1167 1168 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = { 1169 .name = "pcan_usb_pro_fd", 1170 .tseg1_min = 1, 1171 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1172 .tseg2_min = 1, 1173 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1174 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1175 .brp_min = 1, 1176 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1177 .brp_inc = 1, 1178 }; 1179 1180 const struct peak_usb_adapter pcan_usb_pro_fd = { 1181 .name = "PCAN-USB Pro FD", 1182 .device_id = PCAN_USBPROFD_PRODUCT_ID, 1183 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT, 1184 .ctrlmode_supported = CAN_CTRLMODE_FD | 1185 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY | 1186 CAN_CTRLMODE_CC_LEN8_DLC, 1187 .clock = { 1188 .freq = PCAN_UFD_CRYSTAL_HZ, 1189 }, 1190 .bittiming_const = &pcan_usb_pro_fd_const, 1191 .data_bittiming_const = &pcan_usb_pro_fd_data_const, 1192 1193 /* size of device private data */ 1194 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1195 1196 /* timestamps usage */ 1197 .ts_used_bits = 32, 1198 .ts_period = 1000000, /* calibration period in ts. */ 1199 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1200 .us_per_ts_shift = 0, 1201 1202 /* give here messages in/out endpoints */ 1203 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1204 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1}, 1205 1206 /* size of rx/tx usb buffers */ 1207 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1208 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1209 1210 /* device callbacks */ 1211 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1212 .dev_init = pcan_usb_fd_init, 1213 1214 .dev_exit = pcan_usb_fd_exit, 1215 .dev_free = pcan_usb_fd_free, 1216 .dev_set_bus = pcan_usb_fd_set_bus, 1217 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1218 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1219 .dev_decode_buf = pcan_usb_fd_decode_buf, 1220 .dev_start = pcan_usb_fd_start, 1221 .dev_stop = pcan_usb_fd_stop, 1222 .dev_restart_async = pcan_usb_fd_restart_async, 1223 .dev_encode_msg = pcan_usb_fd_encode_msg, 1224 1225 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1226 }; 1227 1228 /* describes the PCAN-USB X6 adapter */ 1229 static const struct can_bittiming_const pcan_usb_x6_const = { 1230 .name = "pcan_usb_x6", 1231 .tseg1_min = 1, 1232 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 1233 .tseg2_min = 1, 1234 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 1235 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 1236 .brp_min = 1, 1237 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1238 .brp_inc = 1, 1239 }; 1240 1241 static const struct can_bittiming_const pcan_usb_x6_data_const = { 1242 .name = "pcan_usb_x6", 1243 .tseg1_min = 1, 1244 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1245 .tseg2_min = 1, 1246 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1247 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1248 .brp_min = 1, 1249 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1250 .brp_inc = 1, 1251 }; 1252 1253 const struct peak_usb_adapter pcan_usb_x6 = { 1254 .name = "PCAN-USB X6", 1255 .device_id = PCAN_USBX6_PRODUCT_ID, 1256 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT, 1257 .ctrlmode_supported = CAN_CTRLMODE_FD | 1258 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY | 1259 CAN_CTRLMODE_CC_LEN8_DLC, 1260 .clock = { 1261 .freq = PCAN_UFD_CRYSTAL_HZ, 1262 }, 1263 .bittiming_const = &pcan_usb_x6_const, 1264 .data_bittiming_const = &pcan_usb_x6_data_const, 1265 1266 /* size of device private data */ 1267 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1268 1269 /* timestamps usage */ 1270 .ts_used_bits = 32, 1271 .ts_period = 1000000, /* calibration period in ts. */ 1272 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1273 .us_per_ts_shift = 0, 1274 1275 /* give here messages in/out endpoints */ 1276 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1277 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1}, 1278 1279 /* size of rx/tx usb buffers */ 1280 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1281 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1282 1283 /* device callbacks */ 1284 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1285 .dev_init = pcan_usb_fd_init, 1286 1287 .dev_exit = pcan_usb_fd_exit, 1288 .dev_free = pcan_usb_fd_free, 1289 .dev_set_bus = pcan_usb_fd_set_bus, 1290 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1291 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1292 .dev_decode_buf = pcan_usb_fd_decode_buf, 1293 .dev_start = pcan_usb_fd_start, 1294 .dev_stop = pcan_usb_fd_stop, 1295 .dev_restart_async = pcan_usb_fd_restart_async, 1296 .dev_encode_msg = pcan_usb_fd_encode_msg, 1297 1298 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1299 }; 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