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 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB FD adapter"); 20 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro FD adapter"); 21 22 #define PCAN_USBPROFD_CHANNEL_COUNT 2 23 #define PCAN_USBFD_CHANNEL_COUNT 1 24 25 /* PCAN-USB Pro FD adapter internal clock (Hz) */ 26 #define PCAN_UFD_CRYSTAL_HZ 80000000 27 28 #define PCAN_UFD_CMD_BUFFER_SIZE 512 29 #define PCAN_UFD_LOSPD_PKT_SIZE 64 30 31 /* PCAN-USB Pro FD command timeout (ms.) */ 32 #define PCAN_UFD_CMD_TIMEOUT_MS 1000 33 34 /* PCAN-USB Pro FD rx/tx buffers size */ 35 #define PCAN_UFD_RX_BUFFER_SIZE 2048 36 #define PCAN_UFD_TX_BUFFER_SIZE 512 37 38 /* read some versions info from the hw devcie */ 39 struct __packed pcan_ufd_fw_info { 40 __le16 size_of; /* sizeof this */ 41 __le16 type; /* type of this structure */ 42 u8 hw_type; /* Type of hardware (HW_TYPE_xxx) */ 43 u8 bl_version[3]; /* Bootloader version */ 44 u8 hw_version; /* Hardware version (PCB) */ 45 u8 fw_version[3]; /* Firmware version */ 46 __le32 dev_id[2]; /* "device id" per CAN */ 47 __le32 ser_no; /* S/N */ 48 __le32 flags; /* special functions */ 49 }; 50 51 /* handle device specific info used by the netdevices */ 52 struct pcan_usb_fd_if { 53 struct peak_usb_device *dev[PCAN_USB_MAX_CHANNEL]; 54 struct pcan_ufd_fw_info fw_info; 55 struct peak_time_ref time_ref; 56 int cm_ignore_count; 57 int dev_opened_count; 58 }; 59 60 /* device information */ 61 struct pcan_usb_fd_device { 62 struct peak_usb_device dev; 63 struct can_berr_counter bec; 64 struct pcan_usb_fd_if *usb_if; 65 u8 *cmd_buffer_addr; 66 }; 67 68 /* Extended USB commands (non uCAN commands) */ 69 70 /* Clock Modes command */ 71 #define PCAN_UFD_CMD_CLK_SET 0x80 72 73 #define PCAN_UFD_CLK_80MHZ 0x0 74 #define PCAN_UFD_CLK_60MHZ 0x1 75 #define PCAN_UFD_CLK_40MHZ 0x2 76 #define PCAN_UFD_CLK_30MHZ 0x3 77 #define PCAN_UFD_CLK_24MHZ 0x4 78 #define PCAN_UFD_CLK_20MHZ 0x5 79 #define PCAN_UFD_CLK_DEF PCAN_UFD_CLK_80MHZ 80 81 struct __packed pcan_ufd_clock { 82 __le16 opcode_channel; 83 84 u8 mode; 85 u8 unused[5]; 86 }; 87 88 /* LED control command */ 89 #define PCAN_UFD_CMD_LED_SET 0x86 90 91 #define PCAN_UFD_LED_DEV 0x00 92 #define PCAN_UFD_LED_FAST 0x01 93 #define PCAN_UFD_LED_SLOW 0x02 94 #define PCAN_UFD_LED_ON 0x03 95 #define PCAN_UFD_LED_OFF 0x04 96 #define PCAN_UFD_LED_DEF PCAN_UFD_LED_DEV 97 98 struct __packed pcan_ufd_led { 99 __le16 opcode_channel; 100 101 u8 mode; 102 u8 unused[5]; 103 }; 104 105 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */ 106 #define PCAN_UFD_FLTEXT_CALIBRATION 0x8000 107 108 struct __packed pcan_ufd_options { 109 __le16 opcode_channel; 110 111 __le16 ucan_mask; 112 u16 unused; 113 __le16 usb_mask; 114 }; 115 116 /* Extended usage of uCAN messages for PCAN-USB Pro FD */ 117 #define PCAN_UFD_MSG_CALIBRATION 0x100 118 119 struct __packed pcan_ufd_ts_msg { 120 __le16 size; 121 __le16 type; 122 __le32 ts_low; 123 __le32 ts_high; 124 __le16 usb_frame_index; 125 u16 unused; 126 }; 127 128 #define PCAN_UFD_MSG_OVERRUN 0x101 129 130 #define PCAN_UFD_OVMSG_CHANNEL(o) ((o)->channel & 0xf) 131 132 struct __packed pcan_ufd_ovr_msg { 133 __le16 size; 134 __le16 type; 135 __le32 ts_low; 136 __le32 ts_high; 137 u8 channel; 138 u8 unused[3]; 139 }; 140 pufd_omsg_get_channel(struct pcan_ufd_ovr_msg * om)141 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om) 142 { 143 return om->channel & 0xf; 144 } 145 146 /* Clock mode frequency values */ 147 static const u32 pcan_usb_fd_clk_freq[6] = { 148 [PCAN_UFD_CLK_80MHZ] = 80000000, 149 [PCAN_UFD_CLK_60MHZ] = 60000000, 150 [PCAN_UFD_CLK_40MHZ] = 40000000, 151 [PCAN_UFD_CLK_30MHZ] = 30000000, 152 [PCAN_UFD_CLK_24MHZ] = 24000000, 153 [PCAN_UFD_CLK_20MHZ] = 20000000 154 }; 155 156 /* return a device USB interface */ 157 static inline pcan_usb_fd_dev_if(struct peak_usb_device * dev)158 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev) 159 { 160 struct pcan_usb_fd_device *pdev = 161 container_of(dev, struct pcan_usb_fd_device, dev); 162 return pdev->usb_if; 163 } 164 165 /* return a device USB commands buffer */ pcan_usb_fd_cmd_buffer(struct peak_usb_device * dev)166 static inline void *pcan_usb_fd_cmd_buffer(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->cmd_buffer_addr; 171 } 172 173 /* send PCAN-USB Pro FD commands synchronously */ pcan_usb_fd_send_cmd(struct peak_usb_device * dev,void * cmd_tail)174 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail) 175 { 176 void *cmd_head = pcan_usb_fd_cmd_buffer(dev); 177 int err = 0; 178 u8 *packet_ptr; 179 int packet_len; 180 ptrdiff_t cmd_len; 181 182 /* usb device unregistered? */ 183 if (!(dev->state & PCAN_USB_STATE_CONNECTED)) 184 return 0; 185 186 /* if a packet is not filled completely by commands, the command list 187 * is terminated with an "end of collection" record. 188 */ 189 cmd_len = cmd_tail - cmd_head; 190 if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) { 191 memset(cmd_tail, 0xff, sizeof(u64)); 192 cmd_len += sizeof(u64); 193 } 194 195 packet_ptr = cmd_head; 196 packet_len = cmd_len; 197 198 /* firmware is not able to re-assemble 512 bytes buffer in full-speed */ 199 if (unlikely(dev->udev->speed != USB_SPEED_HIGH)) 200 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE); 201 202 do { 203 err = usb_bulk_msg(dev->udev, 204 usb_sndbulkpipe(dev->udev, 205 PCAN_USBPRO_EP_CMDOUT), 206 packet_ptr, packet_len, 207 NULL, PCAN_UFD_CMD_TIMEOUT_MS); 208 if (err) { 209 netdev_err(dev->netdev, 210 "sending command failure: %d\n", err); 211 break; 212 } 213 214 packet_ptr += packet_len; 215 cmd_len -= packet_len; 216 217 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE) 218 packet_len = cmd_len; 219 220 } while (packet_len > 0); 221 222 return err; 223 } 224 225 /* build the commands list in the given buffer, to enter operational mode */ pcan_usb_fd_build_restart_cmd(struct peak_usb_device * dev,u8 * buf)226 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf) 227 { 228 struct pucan_wr_err_cnt *prc; 229 struct pucan_command *cmd; 230 u8 *pc = buf; 231 232 /* 1st, reset error counters: */ 233 prc = (struct pucan_wr_err_cnt *)pc; 234 prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 235 PUCAN_CMD_WR_ERR_CNT); 236 237 /* select both counters */ 238 prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE); 239 240 /* and reset their values */ 241 prc->tx_counter = 0; 242 prc->rx_counter = 0; 243 244 /* moves the pointer forward */ 245 pc += sizeof(struct pucan_wr_err_cnt); 246 247 /* add command to switch from ISO to non-ISO mode, if fw allows it */ 248 if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) { 249 struct pucan_options *puo = (struct pucan_options *)pc; 250 251 puo->opcode_channel = 252 (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ? 253 pucan_cmd_opcode_channel(dev->ctrl_idx, 254 PUCAN_CMD_CLR_DIS_OPTION) : 255 pucan_cmd_opcode_channel(dev->ctrl_idx, 256 PUCAN_CMD_SET_EN_OPTION); 257 258 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO); 259 260 /* to be sure that no other extended bits will be taken into 261 * account 262 */ 263 puo->unused = 0; 264 265 /* moves the pointer forward */ 266 pc += sizeof(struct pucan_options); 267 } 268 269 /* next, go back to operational mode */ 270 cmd = (struct pucan_command *)pc; 271 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 272 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ? 273 PUCAN_CMD_LISTEN_ONLY_MODE : 274 PUCAN_CMD_NORMAL_MODE); 275 pc += sizeof(struct pucan_command); 276 277 return pc - buf; 278 } 279 280 /* set CAN bus on/off */ pcan_usb_fd_set_bus(struct peak_usb_device * dev,u8 onoff)281 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff) 282 { 283 u8 *pc = pcan_usb_fd_cmd_buffer(dev); 284 int l; 285 286 if (onoff) { 287 /* build the cmds list to enter operational mode */ 288 l = pcan_usb_fd_build_restart_cmd(dev, pc); 289 } else { 290 struct pucan_command *cmd = (struct pucan_command *)pc; 291 292 /* build cmd to go back to reset mode */ 293 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 294 PUCAN_CMD_RESET_MODE); 295 l = sizeof(struct pucan_command); 296 } 297 298 /* send the command */ 299 return pcan_usb_fd_send_cmd(dev, pc + l); 300 } 301 302 /* set filtering masks: 303 * 304 * idx in range [0..63] selects a row #idx, all rows otherwise 305 * mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s) 306 * 307 * Each bit of this 64 x 32 bits array defines a CANID value: 308 * 309 * bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while 310 * bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded. 311 */ pcan_usb_fd_set_filter_std(struct peak_usb_device * dev,int idx,u32 mask)312 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx, 313 u32 mask) 314 { 315 struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev); 316 int i, n; 317 318 /* select all rows when idx is out of range [0..63] */ 319 if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) { 320 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS; 321 idx = 0; 322 323 /* select the row (and only the row) otherwise */ 324 } else { 325 n = idx + 1; 326 } 327 328 for (i = idx; i < n; i++, cmd++) { 329 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 330 PUCAN_CMD_FILTER_STD); 331 cmd->idx = cpu_to_le16(i); 332 cmd->mask = cpu_to_le32(mask); 333 } 334 335 /* send the command */ 336 return pcan_usb_fd_send_cmd(dev, cmd); 337 } 338 339 /* set/unset options 340 * 341 * onoff set(1)/unset(0) options 342 * mask each bit defines a kind of options to set/unset 343 */ pcan_usb_fd_set_options(struct peak_usb_device * dev,bool onoff,u16 ucan_mask,u16 usb_mask)344 static int pcan_usb_fd_set_options(struct peak_usb_device *dev, 345 bool onoff, u16 ucan_mask, u16 usb_mask) 346 { 347 struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev); 348 349 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 350 (onoff) ? PUCAN_CMD_SET_EN_OPTION : 351 PUCAN_CMD_CLR_DIS_OPTION); 352 353 cmd->ucan_mask = cpu_to_le16(ucan_mask); 354 cmd->usb_mask = cpu_to_le16(usb_mask); 355 356 /* send the command */ 357 return pcan_usb_fd_send_cmd(dev, ++cmd); 358 } 359 360 /* setup LED control */ pcan_usb_fd_set_can_led(struct peak_usb_device * dev,u8 led_mode)361 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode) 362 { 363 struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev); 364 365 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 366 PCAN_UFD_CMD_LED_SET); 367 cmd->mode = led_mode; 368 369 /* send the command */ 370 return pcan_usb_fd_send_cmd(dev, ++cmd); 371 } 372 373 /* set CAN clock domain */ pcan_usb_fd_set_clock_domain(struct peak_usb_device * dev,u8 clk_mode)374 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev, 375 u8 clk_mode) 376 { 377 struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev); 378 379 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 380 PCAN_UFD_CMD_CLK_SET); 381 cmd->mode = clk_mode; 382 383 /* send the command */ 384 return pcan_usb_fd_send_cmd(dev, ++cmd); 385 } 386 387 /* set bittiming for CAN and CAN-FD header */ pcan_usb_fd_set_bittiming_slow(struct peak_usb_device * dev,struct can_bittiming * bt)388 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev, 389 struct can_bittiming *bt) 390 { 391 struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev); 392 393 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 394 PUCAN_CMD_TIMING_SLOW); 395 cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1, 396 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES); 397 398 cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1); 399 cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1); 400 cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1)); 401 402 cmd->ewl = 96; /* default */ 403 404 /* send the command */ 405 return pcan_usb_fd_send_cmd(dev, ++cmd); 406 } 407 408 /* set CAN-FD bittiming for data */ pcan_usb_fd_set_bittiming_fast(struct peak_usb_device * dev,struct can_bittiming * bt)409 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev, 410 struct can_bittiming *bt) 411 { 412 struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev); 413 414 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx, 415 PUCAN_CMD_TIMING_FAST); 416 cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1); 417 cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1); 418 cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1); 419 cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1)); 420 421 /* send the command */ 422 return pcan_usb_fd_send_cmd(dev, ++cmd); 423 } 424 425 /* handle restart but in asynchronously way 426 * (uses PCAN-USB Pro code to complete asynchronous request) 427 */ pcan_usb_fd_restart_async(struct peak_usb_device * dev,struct urb * urb,u8 * buf)428 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev, 429 struct urb *urb, u8 *buf) 430 { 431 u8 *pc = buf; 432 433 /* build the entire cmds list in the provided buffer, to go back into 434 * operational mode. 435 */ 436 pc += pcan_usb_fd_build_restart_cmd(dev, pc); 437 438 /* add EOC */ 439 memset(pc, 0xff, sizeof(struct pucan_command)); 440 pc += sizeof(struct pucan_command); 441 442 /* complete the URB */ 443 usb_fill_bulk_urb(urb, dev->udev, 444 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT), 445 buf, pc - buf, 446 pcan_usb_pro_restart_complete, dev); 447 448 /* and submit it. */ 449 return usb_submit_urb(urb, GFP_ATOMIC); 450 } 451 pcan_usb_fd_drv_loaded(struct peak_usb_device * dev,bool loaded)452 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded) 453 { 454 struct pcan_usb_fd_device *pdev = 455 container_of(dev, struct pcan_usb_fd_device, dev); 456 457 pdev->cmd_buffer_addr[0] = 0; 458 pdev->cmd_buffer_addr[1] = !!loaded; 459 460 return pcan_usb_pro_send_req(dev, 461 PCAN_USBPRO_REQ_FCT, 462 PCAN_USBPRO_FCT_DRVLD, 463 pdev->cmd_buffer_addr, 464 PCAN_USBPRO_FCT_DRVLD_REQ_LEN); 465 } 466 pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)467 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if, 468 struct pucan_msg *rx_msg) 469 { 470 struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg; 471 struct peak_usb_device *dev = usb_if->dev[pucan_msg_get_channel(rm)]; 472 struct net_device *netdev = dev->netdev; 473 struct canfd_frame *cfd; 474 struct sk_buff *skb; 475 const u16 rx_msg_flags = le16_to_cpu(rm->flags); 476 477 if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) { 478 /* CANFD frame case */ 479 skb = alloc_canfd_skb(netdev, &cfd); 480 if (!skb) 481 return -ENOMEM; 482 483 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH) 484 cfd->flags |= CANFD_BRS; 485 486 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND) 487 cfd->flags |= CANFD_ESI; 488 489 cfd->len = can_dlc2len(get_canfd_dlc(pucan_msg_get_dlc(rm))); 490 } else { 491 /* CAN 2.0 frame case */ 492 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd); 493 if (!skb) 494 return -ENOMEM; 495 496 cfd->len = get_can_dlc(pucan_msg_get_dlc(rm)); 497 } 498 499 cfd->can_id = le32_to_cpu(rm->can_id); 500 501 if (rx_msg_flags & PUCAN_MSG_EXT_ID) 502 cfd->can_id |= CAN_EFF_FLAG; 503 504 if (rx_msg_flags & PUCAN_MSG_RTR) 505 cfd->can_id |= CAN_RTR_FLAG; 506 else 507 memcpy(cfd->data, rm->d, cfd->len); 508 509 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low)); 510 511 netdev->stats.rx_packets++; 512 netdev->stats.rx_bytes += cfd->len; 513 514 return 0; 515 } 516 517 /* handle uCAN status message */ pcan_usb_fd_decode_status(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)518 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if, 519 struct pucan_msg *rx_msg) 520 { 521 struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg; 522 struct peak_usb_device *dev = usb_if->dev[pucan_stmsg_get_channel(sm)]; 523 struct pcan_usb_fd_device *pdev = 524 container_of(dev, struct pcan_usb_fd_device, dev); 525 enum can_state new_state = CAN_STATE_ERROR_ACTIVE; 526 enum can_state rx_state, tx_state; 527 struct net_device *netdev = dev->netdev; 528 struct can_frame *cf; 529 struct sk_buff *skb; 530 531 /* nothing should be sent while in BUS_OFF state */ 532 if (dev->can.state == CAN_STATE_BUS_OFF) 533 return 0; 534 535 if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) { 536 new_state = CAN_STATE_BUS_OFF; 537 } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) { 538 new_state = CAN_STATE_ERROR_PASSIVE; 539 } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) { 540 new_state = CAN_STATE_ERROR_WARNING; 541 } else { 542 /* no error bit (so, no error skb, back to active state) */ 543 dev->can.state = CAN_STATE_ERROR_ACTIVE; 544 pdev->bec.txerr = 0; 545 pdev->bec.rxerr = 0; 546 return 0; 547 } 548 549 /* state hasn't changed */ 550 if (new_state == dev->can.state) 551 return 0; 552 553 /* handle bus state change */ 554 tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0; 555 rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0; 556 557 /* allocate an skb to store the error frame */ 558 skb = alloc_can_err_skb(netdev, &cf); 559 if (skb) 560 can_change_state(netdev, cf, tx_state, rx_state); 561 562 /* things must be done even in case of OOM */ 563 if (new_state == CAN_STATE_BUS_OFF) 564 can_bus_off(netdev); 565 566 if (!skb) 567 return -ENOMEM; 568 569 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low)); 570 571 netdev->stats.rx_packets++; 572 netdev->stats.rx_bytes += cf->can_dlc; 573 574 return 0; 575 } 576 577 /* handle uCAN error message */ pcan_usb_fd_decode_error(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)578 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if, 579 struct pucan_msg *rx_msg) 580 { 581 struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg; 582 struct peak_usb_device *dev = usb_if->dev[pucan_ermsg_get_channel(er)]; 583 struct pcan_usb_fd_device *pdev = 584 container_of(dev, struct pcan_usb_fd_device, dev); 585 586 /* keep a trace of tx and rx error counters for later use */ 587 pdev->bec.txerr = er->tx_err_cnt; 588 pdev->bec.rxerr = er->rx_err_cnt; 589 590 return 0; 591 } 592 593 /* handle uCAN overrun message */ pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)594 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if, 595 struct pucan_msg *rx_msg) 596 { 597 struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg; 598 struct peak_usb_device *dev = usb_if->dev[pufd_omsg_get_channel(ov)]; 599 struct net_device *netdev = dev->netdev; 600 struct can_frame *cf; 601 struct sk_buff *skb; 602 603 /* allocate an skb to store the error frame */ 604 skb = alloc_can_err_skb(netdev, &cf); 605 if (!skb) 606 return -ENOMEM; 607 608 cf->can_id |= CAN_ERR_CRTL; 609 cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW; 610 611 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low)); 612 613 netdev->stats.rx_over_errors++; 614 netdev->stats.rx_errors++; 615 616 return 0; 617 } 618 619 /* handle USB calibration message */ pcan_usb_fd_decode_ts(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)620 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if, 621 struct pucan_msg *rx_msg) 622 { 623 struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg; 624 625 /* should wait until clock is stabilized */ 626 if (usb_if->cm_ignore_count > 0) 627 usb_if->cm_ignore_count--; 628 else 629 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low)); 630 } 631 632 /* callback for bulk IN urb */ pcan_usb_fd_decode_buf(struct peak_usb_device * dev,struct urb * urb)633 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb) 634 { 635 struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev); 636 struct net_device *netdev = dev->netdev; 637 struct pucan_msg *rx_msg; 638 u8 *msg_ptr, *msg_end; 639 int err = 0; 640 641 /* loop reading all the records from the incoming message */ 642 msg_ptr = urb->transfer_buffer; 643 msg_end = urb->transfer_buffer + urb->actual_length; 644 for (; msg_ptr < msg_end;) { 645 u16 rx_msg_type, rx_msg_size; 646 647 rx_msg = (struct pucan_msg *)msg_ptr; 648 if (!rx_msg->size) { 649 /* null packet found: end of list */ 650 break; 651 } 652 653 rx_msg_size = le16_to_cpu(rx_msg->size); 654 rx_msg_type = le16_to_cpu(rx_msg->type); 655 656 /* check if the record goes out of current packet */ 657 if (msg_ptr + rx_msg_size > msg_end) { 658 netdev_err(netdev, 659 "got frag rec: should inc usb rx buf sze\n"); 660 err = -EBADMSG; 661 break; 662 } 663 664 switch (rx_msg_type) { 665 case PUCAN_MSG_CAN_RX: 666 err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg); 667 if (err < 0) 668 goto fail; 669 break; 670 671 case PCAN_UFD_MSG_CALIBRATION: 672 pcan_usb_fd_decode_ts(usb_if, rx_msg); 673 break; 674 675 case PUCAN_MSG_ERROR: 676 err = pcan_usb_fd_decode_error(usb_if, rx_msg); 677 if (err < 0) 678 goto fail; 679 break; 680 681 case PUCAN_MSG_STATUS: 682 err = pcan_usb_fd_decode_status(usb_if, rx_msg); 683 if (err < 0) 684 goto fail; 685 break; 686 687 case PCAN_UFD_MSG_OVERRUN: 688 err = pcan_usb_fd_decode_overrun(usb_if, rx_msg); 689 if (err < 0) 690 goto fail; 691 break; 692 693 default: 694 netdev_err(netdev, 695 "unhandled msg type 0x%02x (%d): ignored\n", 696 rx_msg_type, rx_msg_type); 697 break; 698 } 699 700 msg_ptr += rx_msg_size; 701 } 702 703 fail: 704 if (err) 705 pcan_dump_mem("received msg", 706 urb->transfer_buffer, urb->actual_length); 707 return err; 708 } 709 710 /* CAN/CANFD frames encoding callback */ pcan_usb_fd_encode_msg(struct peak_usb_device * dev,struct sk_buff * skb,u8 * obuf,size_t * size)711 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev, 712 struct sk_buff *skb, u8 *obuf, size_t *size) 713 { 714 struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf; 715 struct canfd_frame *cfd = (struct canfd_frame *)skb->data; 716 u16 tx_msg_size, tx_msg_flags; 717 u8 can_dlc; 718 719 tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4); 720 tx_msg->size = cpu_to_le16(tx_msg_size); 721 tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX); 722 723 tx_msg_flags = 0; 724 if (cfd->can_id & CAN_EFF_FLAG) { 725 tx_msg_flags |= PUCAN_MSG_EXT_ID; 726 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK); 727 } else { 728 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK); 729 } 730 731 if (can_is_canfd_skb(skb)) { 732 /* considering a CANFD frame */ 733 can_dlc = can_len2dlc(cfd->len); 734 735 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN; 736 737 if (cfd->flags & CANFD_BRS) 738 tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH; 739 740 if (cfd->flags & CANFD_ESI) 741 tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND; 742 } else { 743 /* CAND 2.0 frames */ 744 can_dlc = cfd->len; 745 746 if (cfd->can_id & CAN_RTR_FLAG) 747 tx_msg_flags |= PUCAN_MSG_RTR; 748 } 749 750 tx_msg->flags = cpu_to_le16(tx_msg_flags); 751 tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, can_dlc); 752 memcpy(tx_msg->d, cfd->data, cfd->len); 753 754 /* add null size message to tag the end (messages are 32-bits aligned) 755 */ 756 tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size); 757 758 tx_msg->size = 0; 759 760 /* set the whole size of the USB packet to send */ 761 *size = tx_msg_size + sizeof(u32); 762 763 return 0; 764 } 765 766 /* start the interface (last chance before set bus on) */ pcan_usb_fd_start(struct peak_usb_device * dev)767 static int pcan_usb_fd_start(struct peak_usb_device *dev) 768 { 769 struct pcan_usb_fd_device *pdev = 770 container_of(dev, struct pcan_usb_fd_device, dev); 771 int err; 772 773 /* set filter mode: all acceptance */ 774 err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff); 775 if (err) 776 return err; 777 778 /* opening first device: */ 779 if (pdev->usb_if->dev_opened_count == 0) { 780 /* reset time_ref */ 781 peak_usb_init_time_ref(&pdev->usb_if->time_ref, 782 &pcan_usb_pro_fd); 783 784 /* enable USB calibration messages */ 785 err = pcan_usb_fd_set_options(dev, 1, 786 PUCAN_OPTION_ERROR, 787 PCAN_UFD_FLTEXT_CALIBRATION); 788 } 789 790 pdev->usb_if->dev_opened_count++; 791 792 /* reset cached error counters */ 793 pdev->bec.txerr = 0; 794 pdev->bec.rxerr = 0; 795 796 return err; 797 } 798 799 /* socket callback used to copy berr counters values receieved through USB */ pcan_usb_fd_get_berr_counter(const struct net_device * netdev,struct can_berr_counter * bec)800 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev, 801 struct can_berr_counter *bec) 802 { 803 struct peak_usb_device *dev = netdev_priv(netdev); 804 struct pcan_usb_fd_device *pdev = 805 container_of(dev, struct pcan_usb_fd_device, dev); 806 807 *bec = pdev->bec; 808 809 /* must return 0 */ 810 return 0; 811 } 812 813 /* stop interface (last chance before set bus off) */ pcan_usb_fd_stop(struct peak_usb_device * dev)814 static int pcan_usb_fd_stop(struct peak_usb_device *dev) 815 { 816 struct pcan_usb_fd_device *pdev = 817 container_of(dev, struct pcan_usb_fd_device, dev); 818 819 /* turn off special msgs for that interface if no other dev opened */ 820 if (pdev->usb_if->dev_opened_count == 1) 821 pcan_usb_fd_set_options(dev, 0, 822 PUCAN_OPTION_ERROR, 823 PCAN_UFD_FLTEXT_CALIBRATION); 824 pdev->usb_if->dev_opened_count--; 825 826 return 0; 827 } 828 829 /* called when probing, to initialize a device object */ pcan_usb_fd_init(struct peak_usb_device * dev)830 static int pcan_usb_fd_init(struct peak_usb_device *dev) 831 { 832 struct pcan_usb_fd_device *pdev = 833 container_of(dev, struct pcan_usb_fd_device, dev); 834 int i, err = -ENOMEM; 835 836 /* do this for 1st channel only */ 837 if (!dev->prev_siblings) { 838 /* allocate netdevices common structure attached to first one */ 839 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL); 840 if (!pdev->usb_if) 841 goto err_out; 842 843 /* allocate command buffer once for all for the interface */ 844 pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE, 845 GFP_KERNEL); 846 if (!pdev->cmd_buffer_addr) 847 goto err_out_1; 848 849 /* number of ts msgs to ignore before taking one into account */ 850 pdev->usb_if->cm_ignore_count = 5; 851 852 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO, 853 PCAN_USBPRO_INFO_FW, 854 &pdev->usb_if->fw_info, 855 sizeof(pdev->usb_if->fw_info)); 856 if (err) { 857 dev_err(dev->netdev->dev.parent, 858 "unable to read %s firmware info (err %d)\n", 859 dev->adapter->name, err); 860 goto err_out_2; 861 } 862 863 /* explicit use of dev_xxx() instead of netdev_xxx() here: 864 * information displayed are related to the device itself, not 865 * to the canx (channel) device. 866 */ 867 dev_info(dev->netdev->dev.parent, 868 "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n", 869 dev->adapter->name, pdev->usb_if->fw_info.hw_version, 870 pdev->usb_if->fw_info.fw_version[0], 871 pdev->usb_if->fw_info.fw_version[1], 872 pdev->usb_if->fw_info.fw_version[2], 873 dev->adapter->ctrl_count); 874 875 /* check for ability to switch between ISO/non-ISO modes */ 876 if (pdev->usb_if->fw_info.fw_version[0] >= 2) { 877 /* firmware >= 2.x supports ISO/non-ISO switching */ 878 dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO; 879 } else { 880 /* firmware < 2.x only supports fixed(!) non-ISO */ 881 dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO; 882 } 883 884 /* tell the hardware the can driver is running */ 885 err = pcan_usb_fd_drv_loaded(dev, 1); 886 if (err) { 887 dev_err(dev->netdev->dev.parent, 888 "unable to tell %s driver is loaded (err %d)\n", 889 dev->adapter->name, err); 890 goto err_out_2; 891 } 892 } else { 893 /* otherwise, simply copy previous sibling's values */ 894 struct pcan_usb_fd_device *ppdev = 895 container_of(dev->prev_siblings, 896 struct pcan_usb_fd_device, dev); 897 898 pdev->usb_if = ppdev->usb_if; 899 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr; 900 901 /* do a copy of the ctrlmode[_supported] too */ 902 dev->can.ctrlmode = ppdev->dev.can.ctrlmode; 903 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported; 904 } 905 906 pdev->usb_if->dev[dev->ctrl_idx] = dev; 907 dev->device_number = 908 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]); 909 910 /* set clock domain */ 911 for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++) 912 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i]) 913 break; 914 915 if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) { 916 dev_warn(dev->netdev->dev.parent, 917 "incompatible clock frequencies\n"); 918 err = -EINVAL; 919 goto err_out_2; 920 } 921 922 pcan_usb_fd_set_clock_domain(dev, i); 923 924 /* set LED in default state (end of init phase) */ 925 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF); 926 927 return 0; 928 929 err_out_2: 930 kfree(pdev->cmd_buffer_addr); 931 err_out_1: 932 kfree(pdev->usb_if); 933 err_out: 934 return err; 935 } 936 937 /* called when driver module is being unloaded */ pcan_usb_fd_exit(struct peak_usb_device * dev)938 static void pcan_usb_fd_exit(struct peak_usb_device *dev) 939 { 940 struct pcan_usb_fd_device *pdev = 941 container_of(dev, struct pcan_usb_fd_device, dev); 942 943 /* when rmmod called before unplug and if down, should reset things 944 * before leaving 945 */ 946 if (dev->can.state != CAN_STATE_STOPPED) { 947 /* set bus off on the corresponding channel */ 948 pcan_usb_fd_set_bus(dev, 0); 949 } 950 951 /* switch off corresponding CAN LEDs */ 952 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF); 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_fd_set_options(dev, 0, 959 PUCAN_OPTION_ERROR, 960 PCAN_UFD_FLTEXT_CALIBRATION); 961 962 /* tell USB adapter that the driver is being unloaded */ 963 pcan_usb_fd_drv_loaded(dev, 0); 964 } 965 } 966 967 /* called when the USB adapter is unplugged */ pcan_usb_fd_free(struct peak_usb_device * dev)968 static void pcan_usb_fd_free(struct peak_usb_device *dev) 969 { 970 /* last device: can free shared objects now */ 971 if (!dev->prev_siblings && !dev->next_siblings) { 972 struct pcan_usb_fd_device *pdev = 973 container_of(dev, struct pcan_usb_fd_device, dev); 974 975 /* free commands buffer */ 976 kfree(pdev->cmd_buffer_addr); 977 978 /* free usb interface object */ 979 kfree(pdev->usb_if); 980 } 981 } 982 983 /* describes the PCAN-USB FD adapter */ 984 static const struct can_bittiming_const pcan_usb_fd_const = { 985 .name = "pcan_usb_fd", 986 .tseg1_min = 1, 987 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 988 .tseg2_min = 1, 989 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 990 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 991 .brp_min = 1, 992 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 993 .brp_inc = 1, 994 }; 995 996 static const struct can_bittiming_const pcan_usb_fd_data_const = { 997 .name = "pcan_usb_fd", 998 .tseg1_min = 1, 999 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1000 .tseg2_min = 1, 1001 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1002 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1003 .brp_min = 1, 1004 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1005 .brp_inc = 1, 1006 }; 1007 1008 const struct peak_usb_adapter pcan_usb_fd = { 1009 .name = "PCAN-USB FD", 1010 .device_id = PCAN_USBFD_PRODUCT_ID, 1011 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT, 1012 .ctrlmode_supported = CAN_CTRLMODE_FD | 1013 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY, 1014 .clock = { 1015 .freq = PCAN_UFD_CRYSTAL_HZ, 1016 }, 1017 .bittiming_const = &pcan_usb_fd_const, 1018 .data_bittiming_const = &pcan_usb_fd_data_const, 1019 1020 /* size of device private data */ 1021 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1022 1023 /* timestamps usage */ 1024 .ts_used_bits = 32, 1025 .ts_period = 1000000, /* calibration period in ts. */ 1026 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1027 .us_per_ts_shift = 0, 1028 1029 /* give here messages in/out endpoints */ 1030 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1031 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0}, 1032 1033 /* size of rx/tx usb buffers */ 1034 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1035 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1036 1037 /* device callbacks */ 1038 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1039 .dev_init = pcan_usb_fd_init, 1040 1041 .dev_exit = pcan_usb_fd_exit, 1042 .dev_free = pcan_usb_fd_free, 1043 .dev_set_bus = pcan_usb_fd_set_bus, 1044 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1045 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1046 .dev_decode_buf = pcan_usb_fd_decode_buf, 1047 .dev_start = pcan_usb_fd_start, 1048 .dev_stop = pcan_usb_fd_stop, 1049 .dev_restart_async = pcan_usb_fd_restart_async, 1050 .dev_encode_msg = pcan_usb_fd_encode_msg, 1051 1052 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1053 }; 1054 1055 /* describes the PCAN-CHIP USB */ 1056 static const struct can_bittiming_const pcan_usb_chip_const = { 1057 .name = "pcan_chip_usb", 1058 .tseg1_min = 1, 1059 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 1060 .tseg2_min = 1, 1061 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 1062 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 1063 .brp_min = 1, 1064 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1065 .brp_inc = 1, 1066 }; 1067 1068 static const struct can_bittiming_const pcan_usb_chip_data_const = { 1069 .name = "pcan_chip_usb", 1070 .tseg1_min = 1, 1071 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1072 .tseg2_min = 1, 1073 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1074 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1075 .brp_min = 1, 1076 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1077 .brp_inc = 1, 1078 }; 1079 1080 const struct peak_usb_adapter pcan_usb_chip = { 1081 .name = "PCAN-Chip USB", 1082 .device_id = PCAN_USBCHIP_PRODUCT_ID, 1083 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT, 1084 .ctrlmode_supported = CAN_CTRLMODE_FD | 1085 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY, 1086 .clock = { 1087 .freq = PCAN_UFD_CRYSTAL_HZ, 1088 }, 1089 .bittiming_const = &pcan_usb_chip_const, 1090 .data_bittiming_const = &pcan_usb_chip_data_const, 1091 1092 /* size of device private data */ 1093 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1094 1095 /* timestamps usage */ 1096 .ts_used_bits = 32, 1097 .ts_period = 1000000, /* calibration period in ts. */ 1098 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1099 .us_per_ts_shift = 0, 1100 1101 /* give here messages in/out endpoints */ 1102 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1103 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0}, 1104 1105 /* size of rx/tx usb buffers */ 1106 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1107 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1108 1109 /* device callbacks */ 1110 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1111 .dev_init = pcan_usb_fd_init, 1112 1113 .dev_exit = pcan_usb_fd_exit, 1114 .dev_free = pcan_usb_fd_free, 1115 .dev_set_bus = pcan_usb_fd_set_bus, 1116 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1117 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1118 .dev_decode_buf = pcan_usb_fd_decode_buf, 1119 .dev_start = pcan_usb_fd_start, 1120 .dev_stop = pcan_usb_fd_stop, 1121 .dev_restart_async = pcan_usb_fd_restart_async, 1122 .dev_encode_msg = pcan_usb_fd_encode_msg, 1123 1124 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1125 }; 1126 1127 /* describes the PCAN-USB Pro FD adapter */ 1128 static const struct can_bittiming_const pcan_usb_pro_fd_const = { 1129 .name = "pcan_usb_pro_fd", 1130 .tseg1_min = 1, 1131 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 1132 .tseg2_min = 1, 1133 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 1134 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 1135 .brp_min = 1, 1136 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1137 .brp_inc = 1, 1138 }; 1139 1140 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = { 1141 .name = "pcan_usb_pro_fd", 1142 .tseg1_min = 1, 1143 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1144 .tseg2_min = 1, 1145 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1146 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1147 .brp_min = 1, 1148 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1149 .brp_inc = 1, 1150 }; 1151 1152 const struct peak_usb_adapter pcan_usb_pro_fd = { 1153 .name = "PCAN-USB Pro FD", 1154 .device_id = PCAN_USBPROFD_PRODUCT_ID, 1155 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT, 1156 .ctrlmode_supported = CAN_CTRLMODE_FD | 1157 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY, 1158 .clock = { 1159 .freq = PCAN_UFD_CRYSTAL_HZ, 1160 }, 1161 .bittiming_const = &pcan_usb_pro_fd_const, 1162 .data_bittiming_const = &pcan_usb_pro_fd_data_const, 1163 1164 /* size of device private data */ 1165 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1166 1167 /* timestamps usage */ 1168 .ts_used_bits = 32, 1169 .ts_period = 1000000, /* calibration period in ts. */ 1170 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1171 .us_per_ts_shift = 0, 1172 1173 /* give here messages in/out endpoints */ 1174 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1175 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1}, 1176 1177 /* size of rx/tx usb buffers */ 1178 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1179 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1180 1181 /* device callbacks */ 1182 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1183 .dev_init = pcan_usb_fd_init, 1184 1185 .dev_exit = pcan_usb_fd_exit, 1186 .dev_free = pcan_usb_fd_free, 1187 .dev_set_bus = pcan_usb_fd_set_bus, 1188 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1189 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1190 .dev_decode_buf = pcan_usb_fd_decode_buf, 1191 .dev_start = pcan_usb_fd_start, 1192 .dev_stop = pcan_usb_fd_stop, 1193 .dev_restart_async = pcan_usb_fd_restart_async, 1194 .dev_encode_msg = pcan_usb_fd_encode_msg, 1195 1196 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1197 }; 1198 1199 /* describes the PCAN-USB X6 adapter */ 1200 static const struct can_bittiming_const pcan_usb_x6_const = { 1201 .name = "pcan_usb_x6", 1202 .tseg1_min = 1, 1203 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS), 1204 .tseg2_min = 1, 1205 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS), 1206 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS), 1207 .brp_min = 1, 1208 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS), 1209 .brp_inc = 1, 1210 }; 1211 1212 static const struct can_bittiming_const pcan_usb_x6_data_const = { 1213 .name = "pcan_usb_x6", 1214 .tseg1_min = 1, 1215 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS), 1216 .tseg2_min = 1, 1217 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS), 1218 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS), 1219 .brp_min = 1, 1220 .brp_max = (1 << PUCAN_TFAST_BRP_BITS), 1221 .brp_inc = 1, 1222 }; 1223 1224 const struct peak_usb_adapter pcan_usb_x6 = { 1225 .name = "PCAN-USB X6", 1226 .device_id = PCAN_USBX6_PRODUCT_ID, 1227 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT, 1228 .ctrlmode_supported = CAN_CTRLMODE_FD | 1229 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY, 1230 .clock = { 1231 .freq = PCAN_UFD_CRYSTAL_HZ, 1232 }, 1233 .bittiming_const = &pcan_usb_x6_const, 1234 .data_bittiming_const = &pcan_usb_x6_data_const, 1235 1236 /* size of device private data */ 1237 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), 1238 1239 /* timestamps usage */ 1240 .ts_used_bits = 32, 1241 .ts_period = 1000000, /* calibration period in ts. */ 1242 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */ 1243 .us_per_ts_shift = 0, 1244 1245 /* give here messages in/out endpoints */ 1246 .ep_msg_in = PCAN_USBPRO_EP_MSGIN, 1247 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1}, 1248 1249 /* size of rx/tx usb buffers */ 1250 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE, 1251 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE, 1252 1253 /* device callbacks */ 1254 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */ 1255 .dev_init = pcan_usb_fd_init, 1256 1257 .dev_exit = pcan_usb_fd_exit, 1258 .dev_free = pcan_usb_fd_free, 1259 .dev_set_bus = pcan_usb_fd_set_bus, 1260 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow, 1261 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast, 1262 .dev_decode_buf = pcan_usb_fd_decode_buf, 1263 .dev_start = pcan_usb_fd_start, 1264 .dev_stop = pcan_usb_fd_stop, 1265 .dev_restart_async = pcan_usb_fd_restart_async, 1266 .dev_encode_msg = pcan_usb_fd_encode_msg, 1267 1268 .do_get_berr_counter = pcan_usb_fd_get_berr_counter, 1269 }; 1270
