root/drivers/net/can/usb/peak_usb/pcan_usb_fd.c

DEFINITIONS

1. pufd_omsg_get_channel
2. pcan_usb_fd_dev_if
3. pcan_usb_fd_cmd_buffer
4. pcan_usb_fd_send_cmd
5. pcan_usb_fd_build_restart_cmd
6. pcan_usb_fd_set_bus
7. pcan_usb_fd_set_filter_std
8. pcan_usb_fd_set_options
9. pcan_usb_fd_set_can_led
10. pcan_usb_fd_set_clock_domain
11. pcan_usb_fd_set_bittiming_slow
12. pcan_usb_fd_set_bittiming_fast
13. pcan_usb_fd_restart_async
14. pcan_usb_fd_drv_loaded
15. pcan_usb_fd_decode_canmsg
16. pcan_usb_fd_decode_status
17. pcan_usb_fd_decode_error
18. pcan_usb_fd_decode_overrun
19. pcan_usb_fd_decode_ts
20. pcan_usb_fd_decode_buf
21. pcan_usb_fd_encode_msg
22. pcan_usb_fd_start
23. pcan_usb_fd_get_berr_counter
24. pcan_usb_fd_stop
25. pcan_usb_fd_init
26. pcan_usb_fd_exit
27. pcan_usb_fd_free

   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 
 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
 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 */
 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 */
 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 */
 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 */
 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  */
 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  */
 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 */
 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 */
 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 */
 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 */
 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  */
 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 
 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 
 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 */
 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 */
 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 */
 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 */
 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 */
 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 */
 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) */
 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 */
 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) */
 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 */
 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 */
 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 */
 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 };