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

   1 /*
   2  * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter
   3  *
   4  * Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published
   8  * by the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  */
  15 #include <linux/netdevice.h>
  16 #include <linux/usb.h>
  17 #include <linux/module.h>
  18
  19 #include <linux/can.h>
  20 #include <linux/can/dev.h>
  21 #include <linux/can/error.h>
  22 #include <linux/can/dev/peak_canfd.h>
  23
  24 #include "pcan_usb_core.h"
  25 #include "pcan_usb_pro.h"
  26
  27 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB FD adapter");
  28 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro FD adapter");
  29
  30 #define PCAN_USBPROFD_CHANNEL_COUNT     2
  31 #define PCAN_USBFD_CHANNEL_COUNT        1
  32
  33 /* PCAN-USB Pro FD adapter internal clock (Hz) */
  34 #define PCAN_UFD_CRYSTAL_HZ             80000000
  35
  36 #define PCAN_UFD_CMD_BUFFER_SIZE        512
  37 #define PCAN_UFD_LOSPD_PKT_SIZE         64
  38
  39 /* PCAN-USB Pro FD command timeout (ms.) */
  40 #define PCAN_UFD_CMD_TIMEOUT_MS         1000
  41
  42 /* PCAN-USB Pro FD rx/tx buffers size */
  43 #define PCAN_UFD_RX_BUFFER_SIZE         2048
  44 #define PCAN_UFD_TX_BUFFER_SIZE         512
  45
  46 /* read some versions info from the hw devcie */
  47 struct __packed pcan_ufd_fw_info {
  48         __le16  size_of;        /* sizeof this */
  49         __le16  type;           /* type of this structure */
  50         u8      hw_type;        /* Type of hardware (HW_TYPE_xxx) */
  51         u8      bl_version[3];  /* Bootloader version */
  52         u8      hw_version;     /* Hardware version (PCB) */
  53         u8      fw_version[3];  /* Firmware version */
  54         __le32  dev_id[2];      /* "device id" per CAN */
  55         __le32  ser_no;         /* S/N */
  56         __le32  flags;          /* special functions */
  57 };
  58
  59 /* handle device specific info used by the netdevices */
  60 struct pcan_usb_fd_if {
  61         struct peak_usb_device  *dev[PCAN_USB_MAX_CHANNEL];
  62         struct pcan_ufd_fw_info fw_info;
  63         struct peak_time_ref    time_ref;
  64         int                     cm_ignore_count;
  65         int                     dev_opened_count;
  66 };
  67
  68 /* device information */
  69 struct pcan_usb_fd_device {
  70         struct peak_usb_device  dev;
  71         struct can_berr_counter bec;
  72         struct pcan_usb_fd_if   *usb_if;
  73         u8                      *cmd_buffer_addr;
  74 };
  75
  76 /* Extended USB commands (non uCAN commands) */
  77
  78 /* Clock Modes command */
  79 #define PCAN_UFD_CMD_CLK_SET            0x80
  80
  81 #define PCAN_UFD_CLK_80MHZ              0x0
  82 #define PCAN_UFD_CLK_60MHZ              0x1
  83 #define PCAN_UFD_CLK_40MHZ              0x2
  84 #define PCAN_UFD_CLK_30MHZ              0x3
  85 #define PCAN_UFD_CLK_24MHZ              0x4
  86 #define PCAN_UFD_CLK_20MHZ              0x5
  87 #define PCAN_UFD_CLK_DEF                PCAN_UFD_CLK_80MHZ
  88
  89 struct __packed pcan_ufd_clock {
  90         __le16  opcode_channel;
  91
  92         u8      mode;
  93         u8      unused[5];
  94 };
  95
  96 /* LED control command */
  97 #define PCAN_UFD_CMD_LED_SET            0x86
  98
  99 #define PCAN_UFD_LED_DEV                0x00
 100 #define PCAN_UFD_LED_FAST               0x01
 101 #define PCAN_UFD_LED_SLOW               0x02
 102 #define PCAN_UFD_LED_ON                 0x03
 103 #define PCAN_UFD_LED_OFF                0x04
 104 #define PCAN_UFD_LED_DEF                PCAN_UFD_LED_DEV
 105
 106 struct __packed pcan_ufd_led {
 107         __le16  opcode_channel;
 108
 109         u8      mode;
 110         u8      unused[5];
 111 };
 112
 113 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
 114 #define PCAN_UFD_FLTEXT_CALIBRATION     0x8000
 115
 116 struct __packed pcan_ufd_options {
 117         __le16  opcode_channel;
 118
 119         __le16  ucan_mask;
 120         u16     unused;
 121         __le16  usb_mask;
 122 };
 123
 124 /* Extended usage of uCAN messages for PCAN-USB Pro FD */
 125 #define PCAN_UFD_MSG_CALIBRATION        0x100
 126
 127 struct __packed pcan_ufd_ts_msg {
 128         __le16  size;
 129         __le16  type;
 130         __le32  ts_low;
 131         __le32  ts_high;
 132         __le16  usb_frame_index;
 133         u16     unused;
 134 };
 135
 136 #define PCAN_UFD_MSG_OVERRUN            0x101
 137
 138 #define PCAN_UFD_OVMSG_CHANNEL(o)       ((o)->channel & 0xf)
 139
 140 struct __packed pcan_ufd_ovr_msg {
 141         __le16  size;
 142         __le16  type;
 143         __le32  ts_low;
 144         __le32  ts_high;
 145         u8      channel;
 146         u8      unused[3];
 147 };
 148
 149 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
 150 {
 151         return om->channel & 0xf;
 152 }
 153
 154 /* Clock mode frequency values */
 155 static const u32 pcan_usb_fd_clk_freq[6] = {
 156         [PCAN_UFD_CLK_80MHZ] = 80000000,
 157         [PCAN_UFD_CLK_60MHZ] = 60000000,
 158         [PCAN_UFD_CLK_40MHZ] = 40000000,
 159         [PCAN_UFD_CLK_30MHZ] = 30000000,
 160         [PCAN_UFD_CLK_24MHZ] = 24000000,
 161         [PCAN_UFD_CLK_20MHZ] = 20000000
 162 };
 163
 164 /* return a device USB interface */
 165 static inline
 166 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev)
 167 {
 168         struct pcan_usb_fd_device *pdev =
 169                         container_of(dev, struct pcan_usb_fd_device, dev);
 170         return pdev->usb_if;
 171 }
 172
 173 /* return a device USB commands buffer */
 174 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
 175 {
 176         struct pcan_usb_fd_device *pdev =
 177                         container_of(dev, struct pcan_usb_fd_device, dev);
 178         return pdev->cmd_buffer_addr;
 179 }
 180
 181 /* send PCAN-USB Pro FD commands synchronously */
 182 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
 183 {
 184         void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
 185         int err = 0;
 186         u8 *packet_ptr;
 187         int packet_len;
 188         ptrdiff_t cmd_len;
 189
 190         /* usb device unregistered? */
 191         if (!(dev->state & PCAN_USB_STATE_CONNECTED))
 192                 return 0;
 193
 194         /* if a packet is not filled completely by commands, the command list
 195          * is terminated with an "end of collection" record.
 196          */
 197         cmd_len = cmd_tail - cmd_head;
 198         if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
 199                 memset(cmd_tail, 0xff, sizeof(u64));
 200                 cmd_len += sizeof(u64);
 201         }
 202
 203         packet_ptr = cmd_head;
 204         packet_len = cmd_len;
 205
 206         /* firmware is not able to re-assemble 512 bytes buffer in full-speed */
 207         if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
 208                 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
 209
 210         do {
 211                 err = usb_bulk_msg(dev->udev,
 212                                    usb_sndbulkpipe(dev->udev,
 213                                                    PCAN_USBPRO_EP_CMDOUT),
 214                                    packet_ptr, packet_len,
 215                                    NULL, PCAN_UFD_CMD_TIMEOUT_MS);
 216                 if (err) {
 217                         netdev_err(dev->netdev,
 218                                    "sending command failure: %d\n", err);
 219                         break;
 220                 }
 221
 222                 packet_ptr += packet_len;
 223                 cmd_len -= packet_len;
 224
 225                 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
 226                         packet_len = cmd_len;
 227
 228         } while (packet_len > 0);
 229
 230         return err;
 231 }
 232
 233 /* build the commands list in the given buffer, to enter operational mode */
 234 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
 235 {
 236         struct pucan_wr_err_cnt *prc;
 237         struct pucan_command *cmd;
 238         u8 *pc = buf;
 239
 240         /* 1st, reset error counters: */
 241         prc = (struct pucan_wr_err_cnt *)pc;
 242         prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 243                                                        PUCAN_CMD_WR_ERR_CNT);
 244
 245         /* select both counters */
 246         prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
 247
 248         /* and reset their values */
 249         prc->tx_counter = 0;
 250         prc->rx_counter = 0;
 251
 252         /* moves the pointer forward */
 253         pc += sizeof(struct pucan_wr_err_cnt);
 254
 255         /* add command to switch from ISO to non-ISO mode, if fw allows it */
 256         if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
 257                 struct pucan_options *puo = (struct pucan_options *)pc;
 258
 259                 puo->opcode_channel =
 260                         (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
 261                         pucan_cmd_opcode_channel(dev->ctrl_idx,
 262                                                  PUCAN_CMD_CLR_DIS_OPTION) :
 263                         pucan_cmd_opcode_channel(dev->ctrl_idx,
 264                                                  PUCAN_CMD_SET_EN_OPTION);
 265
 266                 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
 267
 268                 /* to be sure that no other extended bits will be taken into
 269                  * account
 270                  */
 271                 puo->unused = 0;
 272
 273                 /* moves the pointer forward */
 274                 pc += sizeof(struct pucan_options);
 275         }
 276
 277         /* next, go back to operational mode */
 278         cmd = (struct pucan_command *)pc;
 279         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 280                                 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
 281                                                 PUCAN_CMD_LISTEN_ONLY_MODE :
 282                                                 PUCAN_CMD_NORMAL_MODE);
 283         pc += sizeof(struct pucan_command);
 284
 285         return pc - buf;
 286 }
 287
 288 /* set CAN bus on/off */
 289 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
 290 {
 291         u8 *pc = pcan_usb_fd_cmd_buffer(dev);
 292         int l;
 293
 294         if (onoff) {
 295                 /* build the cmds list to enter operational mode */
 296                 l = pcan_usb_fd_build_restart_cmd(dev, pc);
 297         } else {
 298                 struct pucan_command *cmd = (struct pucan_command *)pc;
 299
 300                 /* build cmd to go back to reset mode */
 301                 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 302                                                         PUCAN_CMD_RESET_MODE);
 303                 l = sizeof(struct pucan_command);
 304         }
 305
 306         /* send the command */
 307         return pcan_usb_fd_send_cmd(dev, pc + l);
 308 }
 309
 310 /* set filtering masks:
 311  *
 312  *      idx  in range [0..63] selects a row #idx, all rows otherwise
 313  *      mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
 314  *
 315  *      Each bit of this 64 x 32 bits array defines a CANID value:
 316  *
 317  *      bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
 318  *      bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
 319  */
 320 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
 321                                       u32 mask)
 322 {
 323         struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
 324         int i, n;
 325
 326         /* select all rows when idx is out of range [0..63] */
 327         if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
 328                 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
 329                 idx = 0;
 330
 331         /* select the row (and only the row) otherwise */
 332         } else {
 333                 n = idx + 1;
 334         }
 335
 336         for (i = idx; i < n; i++, cmd++) {
 337                 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 338                                                         PUCAN_CMD_FILTER_STD);
 339                 cmd->idx = cpu_to_le16(i);
 340                 cmd->mask = cpu_to_le32(mask);
 341         }
 342
 343         /* send the command */
 344         return pcan_usb_fd_send_cmd(dev, cmd);
 345 }
 346
 347 /* set/unset options
 348  *
 349  *      onoff   set(1)/unset(0) options
 350  *      mask    each bit defines a kind of options to set/unset
 351  */
 352 static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
 353                                    bool onoff, u16 ucan_mask, u16 usb_mask)
 354 {
 355         struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
 356
 357         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 358                                         (onoff) ? PUCAN_CMD_SET_EN_OPTION :
 359                                                   PUCAN_CMD_CLR_DIS_OPTION);
 360
 361         cmd->ucan_mask = cpu_to_le16(ucan_mask);
 362         cmd->usb_mask = cpu_to_le16(usb_mask);
 363
 364         /* send the command */
 365         return pcan_usb_fd_send_cmd(dev, ++cmd);
 366 }
 367
 368 /* setup LED control */
 369 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
 370 {
 371         struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
 372
 373         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 374                                                        PCAN_UFD_CMD_LED_SET);
 375         cmd->mode = led_mode;
 376
 377         /* send the command */
 378         return pcan_usb_fd_send_cmd(dev, ++cmd);
 379 }
 380
 381 /* set CAN clock domain */
 382 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
 383                                         u8 clk_mode)
 384 {
 385         struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
 386
 387         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 388                                                        PCAN_UFD_CMD_CLK_SET);
 389         cmd->mode = clk_mode;
 390
 391         /* send the command */
 392         return pcan_usb_fd_send_cmd(dev, ++cmd);
 393 }
 394
 395 /* set bittiming for CAN and CAN-FD header */
 396 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
 397                                           struct can_bittiming *bt)
 398 {
 399         struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
 400
 401         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 402                                                        PUCAN_CMD_TIMING_SLOW);
 403         cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
 404                                 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
 405
 406         cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
 407         cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
 408         cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
 409
 410         cmd->ewl = 96;  /* default */
 411
 412         /* send the command */
 413         return pcan_usb_fd_send_cmd(dev, ++cmd);
 414 }
 415
 416 /* set CAN-FD bittiming for data */
 417 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
 418                                           struct can_bittiming *bt)
 419 {
 420         struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
 421
 422         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 423                                                        PUCAN_CMD_TIMING_FAST);
 424         cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
 425         cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
 426         cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
 427         cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
 428
 429         /* send the command */
 430         return pcan_usb_fd_send_cmd(dev, ++cmd);
 431 }
 432
 433 /* handle restart but in asynchronously way
 434  * (uses PCAN-USB Pro code to complete asynchronous request)
 435  */
 436 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
 437                                      struct urb *urb, u8 *buf)
 438 {
 439         u8 *pc = buf;
 440
 441         /* build the entire cmds list in the provided buffer, to go back into
 442          * operational mode.
 443          */
 444         pc += pcan_usb_fd_build_restart_cmd(dev, pc);
 445
 446         /* add EOC */
 447         memset(pc, 0xff, sizeof(struct pucan_command));
 448         pc += sizeof(struct pucan_command);
 449
 450         /* complete the URB */
 451         usb_fill_bulk_urb(urb, dev->udev,
 452                           usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
 453                           buf, pc - buf,
 454                           pcan_usb_pro_restart_complete, dev);
 455
 456         /* and submit it. */
 457         return usb_submit_urb(urb, GFP_ATOMIC);
 458 }
 459
 460 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
 461 {
 462         struct pcan_usb_fd_device *pdev =
 463                         container_of(dev, struct pcan_usb_fd_device, dev);
 464
 465         pdev->cmd_buffer_addr[0] = 0;
 466         pdev->cmd_buffer_addr[1] = !!loaded;
 467
 468         return pcan_usb_pro_send_req(dev,
 469                                 PCAN_USBPRO_REQ_FCT,
 470                                 PCAN_USBPRO_FCT_DRVLD,
 471                                 pdev->cmd_buffer_addr,
 472                                 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
 473 }
 474
 475 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
 476                                      struct pucan_msg *rx_msg)
 477 {
 478         struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
 479         struct peak_usb_device *dev;
 480         struct net_device *netdev;
 481         struct canfd_frame *cfd;
 482         struct sk_buff *skb;
 483         const u16 rx_msg_flags = le16_to_cpu(rm->flags);
 484
 485         if (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev))
 486                 return -ENOMEM;
 487
 488         dev = usb_if->dev[pucan_msg_get_channel(rm)];
 489         netdev = dev->netdev;
 490
 491         if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
 492                 /* CANFD frame case */
 493                 skb = alloc_canfd_skb(netdev, &cfd);
 494                 if (!skb)
 495                         return -ENOMEM;
 496
 497                 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
 498                         cfd->flags |= CANFD_BRS;
 499
 500                 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
 501                         cfd->flags |= CANFD_ESI;
 502
 503                 cfd->len = can_dlc2len(get_canfd_dlc(pucan_msg_get_dlc(rm)));
 504         } else {
 505                 /* CAN 2.0 frame case */
 506                 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
 507                 if (!skb)
 508                         return -ENOMEM;
 509
 510                 cfd->len = get_can_dlc(pucan_msg_get_dlc(rm));
 511         }
 512
 513         cfd->can_id = le32_to_cpu(rm->can_id);
 514
 515         if (rx_msg_flags & PUCAN_MSG_EXT_ID)
 516                 cfd->can_id |= CAN_EFF_FLAG;
 517
 518         if (rx_msg_flags & PUCAN_MSG_RTR)
 519                 cfd->can_id |= CAN_RTR_FLAG;
 520         else
 521                 memcpy(cfd->data, rm->d, cfd->len);
 522
 523         peak_usb_netif_rx(skb, &usb_if->time_ref,
 524                           le32_to_cpu(rm->ts_low), le32_to_cpu(rm->ts_high));
 525
 526         netdev->stats.rx_packets++;
 527         netdev->stats.rx_bytes += cfd->len;
 528
 529         return 0;
 530 }
 531
 532 /* handle uCAN status message */
 533 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
 534                                      struct pucan_msg *rx_msg)
 535 {
 536         struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
 537         struct pcan_usb_fd_device *pdev;
 538         enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
 539         enum can_state rx_state, tx_state;
 540         struct peak_usb_device *dev;
 541         struct net_device *netdev;
 542         struct can_frame *cf;
 543         struct sk_buff *skb;
 544
 545         if (pucan_stmsg_get_channel(sm) >= ARRAY_SIZE(usb_if->dev))
 546                 return -ENOMEM;
 547
 548         dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
 549         pdev = container_of(dev, struct pcan_usb_fd_device, dev);
 550         netdev = dev->netdev;
 551
 552         /* nothing should be sent while in BUS_OFF state */
 553         if (dev->can.state == CAN_STATE_BUS_OFF)
 554                 return 0;
 555
 556         if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
 557                 new_state = CAN_STATE_BUS_OFF;
 558         } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
 559                 new_state = CAN_STATE_ERROR_PASSIVE;
 560         } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
 561                 new_state = CAN_STATE_ERROR_WARNING;
 562         } else {
 563                 /* back to (or still in) ERROR_ACTIVE state */
 564                 new_state = CAN_STATE_ERROR_ACTIVE;
 565                 pdev->bec.txerr = 0;
 566                 pdev->bec.rxerr = 0;
 567         }
 568
 569         /* state hasn't changed */
 570         if (new_state == dev->can.state)
 571                 return 0;
 572
 573         /* handle bus state change */
 574         tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
 575         rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
 576
 577         /* allocate an skb to store the error frame */
 578         skb = alloc_can_err_skb(netdev, &cf);
 579         if (skb)
 580                 can_change_state(netdev, cf, tx_state, rx_state);
 581
 582         /* things must be done even in case of OOM */
 583         if (new_state == CAN_STATE_BUS_OFF)
 584                 can_bus_off(netdev);
 585
 586         if (!skb)
 587                 return -ENOMEM;
 588
 589         peak_usb_netif_rx(skb, &usb_if->time_ref,
 590                           le32_to_cpu(sm->ts_low), le32_to_cpu(sm->ts_high));
 591
 592         netdev->stats.rx_packets++;
 593         netdev->stats.rx_bytes += cf->can_dlc;
 594
 595         return 0;
 596 }
 597
 598 /* handle uCAN error message */
 599 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
 600                                     struct pucan_msg *rx_msg)
 601 {
 602         struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
 603         struct pcan_usb_fd_device *pdev;
 604         struct peak_usb_device *dev;
 605
 606         if (pucan_ermsg_get_channel(er) >= ARRAY_SIZE(usb_if->dev))
 607                 return -EINVAL;
 608
 609         dev = usb_if->dev[pucan_ermsg_get_channel(er)];
 610         pdev = container_of(dev, struct pcan_usb_fd_device, dev);
 611
 612         /* keep a trace of tx and rx error counters for later use */
 613         pdev->bec.txerr = er->tx_err_cnt;
 614         pdev->bec.rxerr = er->rx_err_cnt;
 615
 616         return 0;
 617 }
 618
 619 /* handle uCAN overrun message */
 620 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
 621                                       struct pucan_msg *rx_msg)
 622 {
 623         struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
 624         struct peak_usb_device *dev;
 625         struct net_device *netdev;
 626         struct can_frame *cf;
 627         struct sk_buff *skb;
 628
 629         if (pufd_omsg_get_channel(ov) >= ARRAY_SIZE(usb_if->dev))
 630                 return -EINVAL;
 631
 632         dev = usb_if->dev[pufd_omsg_get_channel(ov)];
 633         netdev = dev->netdev;
 634
 635         /* allocate an skb to store the error frame */
 636         skb = alloc_can_err_skb(netdev, &cf);
 637         if (!skb)
 638                 return -ENOMEM;
 639
 640         cf->can_id |= CAN_ERR_CRTL;
 641         cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
 642
 643         peak_usb_netif_rx(skb, &usb_if->time_ref,
 644                           le32_to_cpu(ov->ts_low), le32_to_cpu(ov->ts_high));
 645
 646         netdev->stats.rx_over_errors++;
 647         netdev->stats.rx_errors++;
 648
 649         return 0;
 650 }
 651
 652 /* handle USB calibration message */
 653 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
 654                                   struct pucan_msg *rx_msg)
 655 {
 656         struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
 657
 658         /* should wait until clock is stabilized */
 659         if (usb_if->cm_ignore_count > 0)
 660                 usb_if->cm_ignore_count--;
 661         else
 662                 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
 663 }
 664
 665 /* callback for bulk IN urb */
 666 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
 667 {
 668         struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
 669         struct net_device *netdev = dev->netdev;
 670         struct pucan_msg *rx_msg;
 671         u8 *msg_ptr, *msg_end;
 672         int err = 0;
 673
 674         /* loop reading all the records from the incoming message */
 675         msg_ptr = urb->transfer_buffer;
 676         msg_end = urb->transfer_buffer + urb->actual_length;
 677         for (; msg_ptr < msg_end;) {
 678                 u16 rx_msg_type, rx_msg_size;
 679
 680                 rx_msg = (struct pucan_msg *)msg_ptr;
 681                 if (!rx_msg->size) {
 682                         /* null packet found: end of list */
 683                         break;
 684                 }
 685
 686                 rx_msg_size = le16_to_cpu(rx_msg->size);
 687                 rx_msg_type = le16_to_cpu(rx_msg->type);
 688
 689                 /* check if the record goes out of current packet */
 690                 if (msg_ptr + rx_msg_size > msg_end) {
 691                         netdev_err(netdev,
 692                                    "got frag rec: should inc usb rx buf sze\n");
 693                         err = -EBADMSG;
 694                         break;
 695                 }
 696
 697                 switch (rx_msg_type) {
 698                 case PUCAN_MSG_CAN_RX:
 699                         err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
 700                         if (err < 0)
 701                                 goto fail;
 702                         break;
 703
 704                 case PCAN_UFD_MSG_CALIBRATION:
 705                         pcan_usb_fd_decode_ts(usb_if, rx_msg);
 706                         break;
 707
 708                 case PUCAN_MSG_ERROR:
 709                         err = pcan_usb_fd_decode_error(usb_if, rx_msg);
 710                         if (err < 0)
 711                                 goto fail;
 712                         break;
 713
 714                 case PUCAN_MSG_STATUS:
 715                         err = pcan_usb_fd_decode_status(usb_if, rx_msg);
 716                         if (err < 0)
 717                                 goto fail;
 718                         break;
 719
 720                 case PCAN_UFD_MSG_OVERRUN:
 721                         err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
 722                         if (err < 0)
 723                                 goto fail;
 724                         break;
 725
 726                 default:
 727                         netdev_err(netdev,
 728                                    "unhandled msg type 0x%02x (%d): ignored\n",
 729                                    rx_msg_type, rx_msg_type);
 730                         break;
 731                 }
 732
 733                 msg_ptr += rx_msg_size;
 734         }
 735
 736 fail:
 737         if (err)
 738                 pcan_dump_mem("received msg",
 739                               urb->transfer_buffer, urb->actual_length);
 740         return err;
 741 }
 742
 743 /* CAN/CANFD frames encoding callback */
 744 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
 745                                   struct sk_buff *skb, u8 *obuf, size_t *size)
 746 {
 747         struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
 748         struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
 749         u16 tx_msg_size, tx_msg_flags;
 750         u8 can_dlc;
 751
 752         if (cfd->len > CANFD_MAX_DLEN)
 753                 return -EINVAL;
 754
 755         tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
 756         tx_msg->size = cpu_to_le16(tx_msg_size);
 757         tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
 758
 759         tx_msg_flags = 0;
 760         if (cfd->can_id & CAN_EFF_FLAG) {
 761                 tx_msg_flags |= PUCAN_MSG_EXT_ID;
 762                 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
 763         } else {
 764                 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
 765         }
 766
 767         if (can_is_canfd_skb(skb)) {
 768                 /* considering a CANFD frame */
 769                 can_dlc = can_len2dlc(cfd->len);
 770
 771                 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
 772
 773                 if (cfd->flags & CANFD_BRS)
 774                         tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
 775
 776                 if (cfd->flags & CANFD_ESI)
 777                         tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
 778         } else {
 779                 /* CAND 2.0 frames */
 780                 can_dlc = cfd->len;
 781
 782                 if (cfd->can_id & CAN_RTR_FLAG)
 783                         tx_msg_flags |= PUCAN_MSG_RTR;
 784         }
 785
 786         tx_msg->flags = cpu_to_le16(tx_msg_flags);
 787         tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, can_dlc);
 788         memcpy(tx_msg->d, cfd->data, cfd->len);
 789
 790         /* add null size message to tag the end (messages are 32-bits aligned)
 791          */
 792         tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
 793
 794         tx_msg->size = 0;
 795
 796         /* set the whole size of the USB packet to send */
 797         *size = tx_msg_size + sizeof(u32);
 798
 799         return 0;
 800 }
 801
 802 /* start the interface (last chance before set bus on) */
 803 static int pcan_usb_fd_start(struct peak_usb_device *dev)
 804 {
 805         struct pcan_usb_fd_device *pdev =
 806                         container_of(dev, struct pcan_usb_fd_device, dev);
 807         int err;
 808
 809         /* set filter mode: all acceptance */
 810         err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
 811         if (err)
 812                 return err;
 813
 814         /* opening first device: */
 815         if (pdev->usb_if->dev_opened_count == 0) {
 816                 /* reset time_ref */
 817                 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
 818                                        &pcan_usb_pro_fd);
 819
 820                 /* enable USB calibration messages */
 821                 err = pcan_usb_fd_set_options(dev, 1,
 822                                               PUCAN_OPTION_ERROR,
 823                                               PCAN_UFD_FLTEXT_CALIBRATION);
 824         }
 825
 826         pdev->usb_if->dev_opened_count++;
 827
 828         /* reset cached error counters */
 829         pdev->bec.txerr = 0;
 830         pdev->bec.rxerr = 0;
 831
 832         return err;
 833 }
 834
 835 /* socket callback used to copy berr counters values receieved through USB */
 836 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
 837                                         struct can_berr_counter *bec)
 838 {
 839         struct peak_usb_device *dev = netdev_priv(netdev);
 840         struct pcan_usb_fd_device *pdev =
 841                         container_of(dev, struct pcan_usb_fd_device, dev);
 842
 843         *bec = pdev->bec;
 844
 845         /* must return 0 */
 846         return 0;
 847 }
 848
 849 /* stop interface (last chance before set bus off) */
 850 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
 851 {
 852         struct pcan_usb_fd_device *pdev =
 853                         container_of(dev, struct pcan_usb_fd_device, dev);
 854
 855         /* turn off special msgs for that interface if no other dev opened */
 856         if (pdev->usb_if->dev_opened_count == 1)
 857                 pcan_usb_fd_set_options(dev, 0,
 858                                         PUCAN_OPTION_ERROR,
 859                                         PCAN_UFD_FLTEXT_CALIBRATION);
 860         pdev->usb_if->dev_opened_count--;
 861
 862         return 0;
 863 }
 864
 865 /* called when probing, to initialize a device object */
 866 static int pcan_usb_fd_init(struct peak_usb_device *dev)
 867 {
 868         struct pcan_usb_fd_device *pdev =
 869                         container_of(dev, struct pcan_usb_fd_device, dev);
 870         int i, err = -ENOMEM;
 871
 872         /* do this for 1st channel only */
 873         if (!dev->prev_siblings) {
 874                 /* allocate netdevices common structure attached to first one */
 875                 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
 876                 if (!pdev->usb_if)
 877                         goto err_out;
 878
 879                 /* allocate command buffer once for all for the interface */
 880                 pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
 881                                                 GFP_KERNEL);
 882                 if (!pdev->cmd_buffer_addr)
 883                         goto err_out_1;
 884
 885                 /* number of ts msgs to ignore before taking one into account */
 886                 pdev->usb_if->cm_ignore_count = 5;
 887
 888                 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
 889                                             PCAN_USBPRO_INFO_FW,
 890                                             &pdev->usb_if->fw_info,
 891                                             sizeof(pdev->usb_if->fw_info));
 892                 if (err) {
 893                         dev_err(dev->netdev->dev.parent,
 894                                 "unable to read %s firmware info (err %d)\n",
 895                                 dev->adapter->name, err);
 896                         goto err_out_2;
 897                 }
 898
 899                 /* explicit use of dev_xxx() instead of netdev_xxx() here:
 900                  * information displayed are related to the device itself, not
 901                  * to the canx (channel) device.
 902                  */
 903                 dev_info(dev->netdev->dev.parent,
 904                          "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
 905                          dev->adapter->name, pdev->usb_if->fw_info.hw_version,
 906                          pdev->usb_if->fw_info.fw_version[0],
 907                          pdev->usb_if->fw_info.fw_version[1],
 908                          pdev->usb_if->fw_info.fw_version[2],
 909                          dev->adapter->ctrl_count);
 910
 911                 /* check for ability to switch between ISO/non-ISO modes */
 912                 if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
 913                         /* firmware >= 2.x supports ISO/non-ISO switching */
 914                         dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
 915                 } else {
 916                         /* firmware < 2.x only supports fixed(!) non-ISO */
 917                         dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
 918                 }
 919
 920                 /* tell the hardware the can driver is running */
 921                 err = pcan_usb_fd_drv_loaded(dev, 1);
 922                 if (err) {
 923                         dev_err(dev->netdev->dev.parent,
 924                                 "unable to tell %s driver is loaded (err %d)\n",
 925                                 dev->adapter->name, err);
 926                         goto err_out_2;
 927                 }
 928         } else {
 929                 /* otherwise, simply copy previous sibling's values */
 930                 struct pcan_usb_fd_device *ppdev =
 931                         container_of(dev->prev_siblings,
 932                                      struct pcan_usb_fd_device, dev);
 933
 934                 pdev->usb_if = ppdev->usb_if;
 935                 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
 936
 937                 /* do a copy of the ctrlmode[_supported] too */
 938                 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
 939                 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
 940         }
 941
 942         pdev->usb_if->dev[dev->ctrl_idx] = dev;
 943         dev->device_number =
 944                 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
 945
 946         /* set clock domain */
 947         for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
 948                 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
 949                         break;
 950
 951         if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
 952                 dev_warn(dev->netdev->dev.parent,
 953                          "incompatible clock frequencies\n");
 954                 err = -EINVAL;
 955                 goto err_out_2;
 956         }
 957
 958         pcan_usb_fd_set_clock_domain(dev, i);
 959
 960         /* set LED in default state (end of init phase) */
 961         pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
 962
 963         return 0;
 964
 965 err_out_2:
 966         kfree(pdev->cmd_buffer_addr);
 967 err_out_1:
 968         kfree(pdev->usb_if);
 969 err_out:
 970         return err;
 971 }
 972
 973 /* called when driver module is being unloaded */
 974 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
 975 {
 976         struct pcan_usb_fd_device *pdev =
 977                         container_of(dev, struct pcan_usb_fd_device, dev);
 978
 979         /* when rmmod called before unplug and if down, should reset things
 980          * before leaving
 981          */
 982         if (dev->can.state != CAN_STATE_STOPPED) {
 983                 /* set bus off on the corresponding channel */
 984                 pcan_usb_fd_set_bus(dev, 0);
 985         }
 986
 987         /* switch off corresponding CAN LEDs */
 988         pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
 989
 990         /* if channel #0 (only) */
 991         if (dev->ctrl_idx == 0) {
 992                 /* turn off calibration message if any device were opened */
 993                 if (pdev->usb_if->dev_opened_count > 0)
 994                         pcan_usb_fd_set_options(dev, 0,
 995                                                 PUCAN_OPTION_ERROR,
 996                                                 PCAN_UFD_FLTEXT_CALIBRATION);
 997
 998                 /* tell USB adapter that the driver is being unloaded */
 999                 pcan_usb_fd_drv_loaded(dev, 0);
1000         }
1001 }
1002
1003 /* called when the USB adapter is unplugged */
1004 static void pcan_usb_fd_free(struct peak_usb_device *dev)
1005 {
1006         /* last device: can free shared objects now */
1007         if (!dev->prev_siblings && !dev->next_siblings) {
1008                 struct pcan_usb_fd_device *pdev =
1009                         container_of(dev, struct pcan_usb_fd_device, dev);
1010
1011                 /* free commands buffer */
1012                 kfree(pdev->cmd_buffer_addr);
1013
1014                 /* free usb interface object */
1015                 kfree(pdev->usb_if);
1016         }
1017 }
1018
1019 /* describes the PCAN-USB FD adapter */
1020 static const struct can_bittiming_const pcan_usb_fd_const = {
1021         .name = "pcan_usb_fd",
1022         .tseg1_min = 1,
1023         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1024         .tseg2_min = 1,
1025         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1026         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1027         .brp_min = 1,
1028         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1029         .brp_inc = 1,
1030 };
1031
1032 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1033         .name = "pcan_usb_fd",
1034         .tseg1_min = 1,
1035         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1036         .tseg2_min = 1,
1037         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1038         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1039         .brp_min = 1,
1040         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1041         .brp_inc = 1,
1042 };
1043
1044 const struct peak_usb_adapter pcan_usb_fd = {
1045         .name = "PCAN-USB FD",
1046         .device_id = PCAN_USBFD_PRODUCT_ID,
1047         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1048         .ctrlmode_supported = CAN_CTRLMODE_FD |
1049                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1050         .clock = {
1051                 .freq = PCAN_UFD_CRYSTAL_HZ,
1052         },
1053         .bittiming_const = &pcan_usb_fd_const,
1054         .data_bittiming_const = &pcan_usb_fd_data_const,
1055
1056         /* size of device private data */
1057         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1058
1059         /* timestamps usage */
1060         .ts_used_bits = 32,
1061         .ts_period = 1000000, /* calibration period in ts. */
1062         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1063         .us_per_ts_shift = 0,
1064
1065         /* give here messages in/out endpoints */
1066         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1067         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1068
1069         /* size of rx/tx usb buffers */
1070         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1071         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1072
1073         /* device callbacks */
1074         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1075         .dev_init = pcan_usb_fd_init,
1076
1077         .dev_exit = pcan_usb_fd_exit,
1078         .dev_free = pcan_usb_fd_free,
1079         .dev_set_bus = pcan_usb_fd_set_bus,
1080         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1081         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1082         .dev_decode_buf = pcan_usb_fd_decode_buf,
1083         .dev_start = pcan_usb_fd_start,
1084         .dev_stop = pcan_usb_fd_stop,
1085         .dev_restart_async = pcan_usb_fd_restart_async,
1086         .dev_encode_msg = pcan_usb_fd_encode_msg,
1087
1088         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1089 };
1090
1091 /* describes the PCAN-CHIP USB */
1092 static const struct can_bittiming_const pcan_usb_chip_const = {
1093         .name = "pcan_chip_usb",
1094         .tseg1_min = 1,
1095         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1096         .tseg2_min = 1,
1097         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1098         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1099         .brp_min = 1,
1100         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1101         .brp_inc = 1,
1102 };
1103
1104 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1105         .name = "pcan_chip_usb",
1106         .tseg1_min = 1,
1107         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1108         .tseg2_min = 1,
1109         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1110         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1111         .brp_min = 1,
1112         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1113         .brp_inc = 1,
1114 };
1115
1116 const struct peak_usb_adapter pcan_usb_chip = {
1117         .name = "PCAN-Chip USB",
1118         .device_id = PCAN_USBCHIP_PRODUCT_ID,
1119         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1120         .ctrlmode_supported = CAN_CTRLMODE_FD |
1121                 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1122         .clock = {
1123                 .freq = PCAN_UFD_CRYSTAL_HZ,
1124         },
1125         .bittiming_const = &pcan_usb_chip_const,
1126         .data_bittiming_const = &pcan_usb_chip_data_const,
1127
1128         /* size of device private data */
1129         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1130
1131         /* timestamps usage */
1132         .ts_used_bits = 32,
1133         .ts_period = 1000000, /* calibration period in ts. */
1134         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1135         .us_per_ts_shift = 0,
1136
1137         /* give here messages in/out endpoints */
1138         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1139         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1140
1141         /* size of rx/tx usb buffers */
1142         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1143         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1144
1145         /* device callbacks */
1146         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1147         .dev_init = pcan_usb_fd_init,
1148
1149         .dev_exit = pcan_usb_fd_exit,
1150         .dev_free = pcan_usb_fd_free,
1151         .dev_set_bus = pcan_usb_fd_set_bus,
1152         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1153         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1154         .dev_decode_buf = pcan_usb_fd_decode_buf,
1155         .dev_start = pcan_usb_fd_start,
1156         .dev_stop = pcan_usb_fd_stop,
1157         .dev_restart_async = pcan_usb_fd_restart_async,
1158         .dev_encode_msg = pcan_usb_fd_encode_msg,
1159
1160         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1161 };
1162
1163 /* describes the PCAN-USB Pro FD adapter */
1164 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1165         .name = "pcan_usb_pro_fd",
1166         .tseg1_min = 1,
1167         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1168         .tseg2_min = 1,
1169         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1170         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1171         .brp_min = 1,
1172         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1173         .brp_inc = 1,
1174 };
1175
1176 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1177         .name = "pcan_usb_pro_fd",
1178         .tseg1_min = 1,
1179         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1180         .tseg2_min = 1,
1181         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1182         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1183         .brp_min = 1,
1184         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1185         .brp_inc = 1,
1186 };
1187
1188 const struct peak_usb_adapter pcan_usb_pro_fd = {
1189         .name = "PCAN-USB Pro FD",
1190         .device_id = PCAN_USBPROFD_PRODUCT_ID,
1191         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1192         .ctrlmode_supported = CAN_CTRLMODE_FD |
1193                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1194         .clock = {
1195                 .freq = PCAN_UFD_CRYSTAL_HZ,
1196         },
1197         .bittiming_const = &pcan_usb_pro_fd_const,
1198         .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1199
1200         /* size of device private data */
1201         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1202
1203         /* timestamps usage */
1204         .ts_used_bits = 32,
1205         .ts_period = 1000000, /* calibration period in ts. */
1206         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1207         .us_per_ts_shift = 0,
1208
1209         /* give here messages in/out endpoints */
1210         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1211         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1212
1213         /* size of rx/tx usb buffers */
1214         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1215         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1216
1217         /* device callbacks */
1218         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1219         .dev_init = pcan_usb_fd_init,
1220
1221         .dev_exit = pcan_usb_fd_exit,
1222         .dev_free = pcan_usb_fd_free,
1223         .dev_set_bus = pcan_usb_fd_set_bus,
1224         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1225         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1226         .dev_decode_buf = pcan_usb_fd_decode_buf,
1227         .dev_start = pcan_usb_fd_start,
1228         .dev_stop = pcan_usb_fd_stop,
1229         .dev_restart_async = pcan_usb_fd_restart_async,
1230         .dev_encode_msg = pcan_usb_fd_encode_msg,
1231
1232         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1233 };
1234
1235 /* describes the PCAN-USB X6 adapter */
1236 static const struct can_bittiming_const pcan_usb_x6_const = {
1237         .name = "pcan_usb_x6",
1238         .tseg1_min = 1,
1239         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1240         .tseg2_min = 1,
1241         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1242         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1243         .brp_min = 1,
1244         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1245         .brp_inc = 1,
1246 };
1247
1248 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1249         .name = "pcan_usb_x6",
1250         .tseg1_min = 1,
1251         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1252         .tseg2_min = 1,
1253         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1254         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1255         .brp_min = 1,
1256         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1257         .brp_inc = 1,
1258 };
1259
1260 const struct peak_usb_adapter pcan_usb_x6 = {
1261         .name = "PCAN-USB X6",
1262         .device_id = PCAN_USBX6_PRODUCT_ID,
1263         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1264         .ctrlmode_supported = CAN_CTRLMODE_FD |
1265                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1266         .clock = {
1267                 .freq = PCAN_UFD_CRYSTAL_HZ,
1268         },
1269         .bittiming_const = &pcan_usb_x6_const,
1270         .data_bittiming_const = &pcan_usb_x6_data_const,
1271
1272         /* size of device private data */
1273         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1274
1275         /* timestamps usage */
1276         .ts_used_bits = 32,
1277         .ts_period = 1000000, /* calibration period in ts. */
1278         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1279         .us_per_ts_shift = 0,
1280
1281         /* give here messages in/out endpoints */
1282         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1283         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1284
1285         /* size of rx/tx usb buffers */
1286         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1287         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1288
1289         /* device callbacks */
1290         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1291         .dev_init = pcan_usb_fd_init,
1292
1293         .dev_exit = pcan_usb_fd_exit,
1294         .dev_free = pcan_usb_fd_free,
1295         .dev_set_bus = pcan_usb_fd_set_bus,
1296         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1297         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1298         .dev_decode_buf = pcan_usb_fd_decode_buf,
1299         .dev_start = pcan_usb_fd_start,
1300         .dev_stop = pcan_usb_fd_stop,
1301         .dev_restart_async = pcan_usb_fd_restart_async,
1302         .dev_encode_msg = pcan_usb_fd_encode_msg,
1303
1304         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1305 };