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

   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 device */
  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;
 472         struct net_device *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 (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev))
 478                 return -ENOMEM;
 479
 480         dev = usb_if->dev[pucan_msg_get_channel(rm)];
 481         netdev = dev->netdev;
 482
 483         if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
 484                 /* CANFD frame case */
 485                 skb = alloc_canfd_skb(netdev, &cfd);
 486                 if (!skb)
 487                         return -ENOMEM;
 488
 489                 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
 490                         cfd->flags |= CANFD_BRS;
 491
 492                 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
 493                         cfd->flags |= CANFD_ESI;
 494
 495                 cfd->len = can_dlc2len(get_canfd_dlc(pucan_msg_get_dlc(rm)));
 496         } else {
 497                 /* CAN 2.0 frame case */
 498                 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
 499                 if (!skb)
 500                         return -ENOMEM;
 501
 502                 cfd->len = get_can_dlc(pucan_msg_get_dlc(rm));
 503         }
 504
 505         cfd->can_id = le32_to_cpu(rm->can_id);
 506
 507         if (rx_msg_flags & PUCAN_MSG_EXT_ID)
 508                 cfd->can_id |= CAN_EFF_FLAG;
 509
 510         if (rx_msg_flags & PUCAN_MSG_RTR)
 511                 cfd->can_id |= CAN_RTR_FLAG;
 512         else
 513                 memcpy(cfd->data, rm->d, cfd->len);
 514
 515         peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low));
 516
 517         netdev->stats.rx_packets++;
 518         netdev->stats.rx_bytes += cfd->len;
 519
 520         return 0;
 521 }
 522
 523 /* handle uCAN status message */
 524 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
 525                                      struct pucan_msg *rx_msg)
 526 {
 527         struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
 528         struct pcan_usb_fd_device *pdev;
 529         enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
 530         enum can_state rx_state, tx_state;
 531         struct peak_usb_device *dev;
 532         struct net_device *netdev;
 533         struct can_frame *cf;
 534         struct sk_buff *skb;
 535
 536         if (pucan_stmsg_get_channel(sm) >= ARRAY_SIZE(usb_if->dev))
 537                 return -ENOMEM;
 538
 539         dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
 540         pdev = container_of(dev, struct pcan_usb_fd_device, dev);
 541         netdev = dev->netdev;
 542
 543         /* nothing should be sent while in BUS_OFF state */
 544         if (dev->can.state == CAN_STATE_BUS_OFF)
 545                 return 0;
 546
 547         if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
 548                 new_state = CAN_STATE_BUS_OFF;
 549         } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
 550                 new_state = CAN_STATE_ERROR_PASSIVE;
 551         } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
 552                 new_state = CAN_STATE_ERROR_WARNING;
 553         } else {
 554                 /* no error bit (so, no error skb, back to active state) */
 555                 dev->can.state = CAN_STATE_ERROR_ACTIVE;
 556                 pdev->bec.txerr = 0;
 557                 pdev->bec.rxerr = 0;
 558                 return 0;
 559         }
 560
 561         /* state hasn't changed */
 562         if (new_state == dev->can.state)
 563                 return 0;
 564
 565         /* handle bus state change */
 566         tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
 567         rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
 568
 569         /* allocate an skb to store the error frame */
 570         skb = alloc_can_err_skb(netdev, &cf);
 571         if (skb)
 572                 can_change_state(netdev, cf, tx_state, rx_state);
 573
 574         /* things must be done even in case of OOM */
 575         if (new_state == CAN_STATE_BUS_OFF)
 576                 can_bus_off(netdev);
 577
 578         if (!skb)
 579                 return -ENOMEM;
 580
 581         peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low));
 582
 583         netdev->stats.rx_packets++;
 584         netdev->stats.rx_bytes += cf->can_dlc;
 585
 586         return 0;
 587 }
 588
 589 /* handle uCAN error message */
 590 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
 591                                     struct pucan_msg *rx_msg)
 592 {
 593         struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
 594         struct pcan_usb_fd_device *pdev;
 595         struct peak_usb_device *dev;
 596
 597         if (pucan_ermsg_get_channel(er) >= ARRAY_SIZE(usb_if->dev))
 598                 return -EINVAL;
 599
 600         dev = usb_if->dev[pucan_ermsg_get_channel(er)];
 601         pdev = container_of(dev, struct pcan_usb_fd_device, dev);
 602
 603         /* keep a trace of tx and rx error counters for later use */
 604         pdev->bec.txerr = er->tx_err_cnt;
 605         pdev->bec.rxerr = er->rx_err_cnt;
 606
 607         return 0;
 608 }
 609
 610 /* handle uCAN overrun message */
 611 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
 612                                       struct pucan_msg *rx_msg)
 613 {
 614         struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
 615         struct peak_usb_device *dev;
 616         struct net_device *netdev;
 617         struct can_frame *cf;
 618         struct sk_buff *skb;
 619
 620         if (pufd_omsg_get_channel(ov) >= ARRAY_SIZE(usb_if->dev))
 621                 return -EINVAL;
 622
 623         dev = usb_if->dev[pufd_omsg_get_channel(ov)];
 624         netdev = dev->netdev;
 625
 626         /* allocate an skb to store the error frame */
 627         skb = alloc_can_err_skb(netdev, &cf);
 628         if (!skb)
 629                 return -ENOMEM;
 630
 631         cf->can_id |= CAN_ERR_CRTL;
 632         cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
 633
 634         peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low));
 635
 636         netdev->stats.rx_over_errors++;
 637         netdev->stats.rx_errors++;
 638
 639         return 0;
 640 }
 641
 642 /* handle USB calibration message */
 643 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
 644                                   struct pucan_msg *rx_msg)
 645 {
 646         struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
 647
 648         /* should wait until clock is stabilized */
 649         if (usb_if->cm_ignore_count > 0)
 650                 usb_if->cm_ignore_count--;
 651         else
 652                 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
 653 }
 654
 655 /* callback for bulk IN urb */
 656 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
 657 {
 658         struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
 659         struct net_device *netdev = dev->netdev;
 660         struct pucan_msg *rx_msg;
 661         u8 *msg_ptr, *msg_end;
 662         int err = 0;
 663
 664         /* loop reading all the records from the incoming message */
 665         msg_ptr = urb->transfer_buffer;
 666         msg_end = urb->transfer_buffer + urb->actual_length;
 667         for (; msg_ptr < msg_end;) {
 668                 u16 rx_msg_type, rx_msg_size;
 669
 670                 rx_msg = (struct pucan_msg *)msg_ptr;
 671                 if (!rx_msg->size) {
 672                         /* null packet found: end of list */
 673                         break;
 674                 }
 675
 676                 rx_msg_size = le16_to_cpu(rx_msg->size);
 677                 rx_msg_type = le16_to_cpu(rx_msg->type);
 678
 679                 /* check if the record goes out of current packet */
 680                 if (msg_ptr + rx_msg_size > msg_end) {
 681                         netdev_err(netdev,
 682                                    "got frag rec: should inc usb rx buf sze\n");
 683                         err = -EBADMSG;
 684                         break;
 685                 }
 686
 687                 switch (rx_msg_type) {
 688                 case PUCAN_MSG_CAN_RX:
 689                         err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
 690                         if (err < 0)
 691                                 goto fail;
 692                         break;
 693
 694                 case PCAN_UFD_MSG_CALIBRATION:
 695                         pcan_usb_fd_decode_ts(usb_if, rx_msg);
 696                         break;
 697
 698                 case PUCAN_MSG_ERROR:
 699                         err = pcan_usb_fd_decode_error(usb_if, rx_msg);
 700                         if (err < 0)
 701                                 goto fail;
 702                         break;
 703
 704                 case PUCAN_MSG_STATUS:
 705                         err = pcan_usb_fd_decode_status(usb_if, rx_msg);
 706                         if (err < 0)
 707                                 goto fail;
 708                         break;
 709
 710                 case PCAN_UFD_MSG_OVERRUN:
 711                         err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
 712                         if (err < 0)
 713                                 goto fail;
 714                         break;
 715
 716                 default:
 717                         netdev_err(netdev,
 718                                    "unhandled msg type 0x%02x (%d): ignored\n",
 719                                    rx_msg_type, rx_msg_type);
 720                         break;
 721                 }
 722
 723                 msg_ptr += rx_msg_size;
 724         }
 725
 726 fail:
 727         if (err)
 728                 pcan_dump_mem("received msg",
 729                               urb->transfer_buffer, urb->actual_length);
 730         return err;
 731 }
 732
 733 /* CAN/CANFD frames encoding callback */
 734 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
 735                                   struct sk_buff *skb, u8 *obuf, size_t *size)
 736 {
 737         struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
 738         struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
 739         u16 tx_msg_size, tx_msg_flags;
 740         u8 can_dlc;
 741
 742         if (cfd->len > CANFD_MAX_DLEN)
 743                 return -EINVAL;
 744
 745         tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
 746         tx_msg->size = cpu_to_le16(tx_msg_size);
 747         tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
 748
 749         tx_msg_flags = 0;
 750         if (cfd->can_id & CAN_EFF_FLAG) {
 751                 tx_msg_flags |= PUCAN_MSG_EXT_ID;
 752                 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
 753         } else {
 754                 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
 755         }
 756
 757         if (can_is_canfd_skb(skb)) {
 758                 /* considering a CANFD frame */
 759                 can_dlc = can_len2dlc(cfd->len);
 760
 761                 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
 762
 763                 if (cfd->flags & CANFD_BRS)
 764                         tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
 765
 766                 if (cfd->flags & CANFD_ESI)
 767                         tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
 768         } else {
 769                 /* CAND 2.0 frames */
 770                 can_dlc = cfd->len;
 771
 772                 if (cfd->can_id & CAN_RTR_FLAG)
 773                         tx_msg_flags |= PUCAN_MSG_RTR;
 774         }
 775
 776         tx_msg->flags = cpu_to_le16(tx_msg_flags);
 777         tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, can_dlc);
 778         memcpy(tx_msg->d, cfd->data, cfd->len);
 779
 780         /* add null size message to tag the end (messages are 32-bits aligned)
 781          */
 782         tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
 783
 784         tx_msg->size = 0;
 785
 786         /* set the whole size of the USB packet to send */
 787         *size = tx_msg_size + sizeof(u32);
 788
 789         return 0;
 790 }
 791
 792 /* start the interface (last chance before set bus on) */
 793 static int pcan_usb_fd_start(struct peak_usb_device *dev)
 794 {
 795         struct pcan_usb_fd_device *pdev =
 796                         container_of(dev, struct pcan_usb_fd_device, dev);
 797         int err;
 798
 799         /* set filter mode: all acceptance */
 800         err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
 801         if (err)
 802                 return err;
 803
 804         /* opening first device: */
 805         if (pdev->usb_if->dev_opened_count == 0) {
 806                 /* reset time_ref */
 807                 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
 808                                        &pcan_usb_pro_fd);
 809
 810                 /* enable USB calibration messages */
 811                 err = pcan_usb_fd_set_options(dev, 1,
 812                                               PUCAN_OPTION_ERROR,
 813                                               PCAN_UFD_FLTEXT_CALIBRATION);
 814         }
 815
 816         pdev->usb_if->dev_opened_count++;
 817
 818         /* reset cached error counters */
 819         pdev->bec.txerr = 0;
 820         pdev->bec.rxerr = 0;
 821
 822         return err;
 823 }
 824
 825 /* socket callback used to copy berr counters values received through USB */
 826 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
 827                                         struct can_berr_counter *bec)
 828 {
 829         struct peak_usb_device *dev = netdev_priv(netdev);
 830         struct pcan_usb_fd_device *pdev =
 831                         container_of(dev, struct pcan_usb_fd_device, dev);
 832
 833         *bec = pdev->bec;
 834
 835         /* must return 0 */
 836         return 0;
 837 }
 838
 839 /* stop interface (last chance before set bus off) */
 840 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
 841 {
 842         struct pcan_usb_fd_device *pdev =
 843                         container_of(dev, struct pcan_usb_fd_device, dev);
 844
 845         /* turn off special msgs for that interface if no other dev opened */
 846         if (pdev->usb_if->dev_opened_count == 1)
 847                 pcan_usb_fd_set_options(dev, 0,
 848                                         PUCAN_OPTION_ERROR,
 849                                         PCAN_UFD_FLTEXT_CALIBRATION);
 850         pdev->usb_if->dev_opened_count--;
 851
 852         return 0;
 853 }
 854
 855 /* called when probing, to initialize a device object */
 856 static int pcan_usb_fd_init(struct peak_usb_device *dev)
 857 {
 858         struct pcan_usb_fd_device *pdev =
 859                         container_of(dev, struct pcan_usb_fd_device, dev);
 860         int i, err = -ENOMEM;
 861
 862         /* do this for 1st channel only */
 863         if (!dev->prev_siblings) {
 864                 /* allocate netdevices common structure attached to first one */
 865                 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
 866                 if (!pdev->usb_if)
 867                         goto err_out;
 868
 869                 /* allocate command buffer once for all for the interface */
 870                 pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
 871                                                 GFP_KERNEL);
 872                 if (!pdev->cmd_buffer_addr)
 873                         goto err_out_1;
 874
 875                 /* number of ts msgs to ignore before taking one into account */
 876                 pdev->usb_if->cm_ignore_count = 5;
 877
 878                 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
 879                                             PCAN_USBPRO_INFO_FW,
 880                                             &pdev->usb_if->fw_info,
 881                                             sizeof(pdev->usb_if->fw_info));
 882                 if (err) {
 883                         dev_err(dev->netdev->dev.parent,
 884                                 "unable to read %s firmware info (err %d)\n",
 885                                 dev->adapter->name, err);
 886                         goto err_out_2;
 887                 }
 888
 889                 /* explicit use of dev_xxx() instead of netdev_xxx() here:
 890                  * information displayed are related to the device itself, not
 891                  * to the canx (channel) device.
 892                  */
 893                 dev_info(dev->netdev->dev.parent,
 894                          "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
 895                          dev->adapter->name, pdev->usb_if->fw_info.hw_version,
 896                          pdev->usb_if->fw_info.fw_version[0],
 897                          pdev->usb_if->fw_info.fw_version[1],
 898                          pdev->usb_if->fw_info.fw_version[2],
 899                          dev->adapter->ctrl_count);
 900
 901                 /* check for ability to switch between ISO/non-ISO modes */
 902                 if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
 903                         /* firmware >= 2.x supports ISO/non-ISO switching */
 904                         dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
 905                 } else {
 906                         /* firmware < 2.x only supports fixed(!) non-ISO */
 907                         dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
 908                 }
 909
 910                 /* tell the hardware the can driver is running */
 911                 err = pcan_usb_fd_drv_loaded(dev, 1);
 912                 if (err) {
 913                         dev_err(dev->netdev->dev.parent,
 914                                 "unable to tell %s driver is loaded (err %d)\n",
 915                                 dev->adapter->name, err);
 916                         goto err_out_2;
 917                 }
 918         } else {
 919                 /* otherwise, simply copy previous sibling's values */
 920                 struct pcan_usb_fd_device *ppdev =
 921                         container_of(dev->prev_siblings,
 922                                      struct pcan_usb_fd_device, dev);
 923
 924                 pdev->usb_if = ppdev->usb_if;
 925                 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
 926
 927                 /* do a copy of the ctrlmode[_supported] too */
 928                 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
 929                 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
 930         }
 931
 932         pdev->usb_if->dev[dev->ctrl_idx] = dev;
 933         dev->device_number =
 934                 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
 935
 936         /* set clock domain */
 937         for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
 938                 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
 939                         break;
 940
 941         if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
 942                 dev_warn(dev->netdev->dev.parent,
 943                          "incompatible clock frequencies\n");
 944                 err = -EINVAL;
 945                 goto err_out_2;
 946         }
 947
 948         pcan_usb_fd_set_clock_domain(dev, i);
 949
 950         /* set LED in default state (end of init phase) */
 951         pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
 952
 953         return 0;
 954
 955 err_out_2:
 956         kfree(pdev->cmd_buffer_addr);
 957 err_out_1:
 958         kfree(pdev->usb_if);
 959 err_out:
 960         return err;
 961 }
 962
 963 /* called when driver module is being unloaded */
 964 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
 965 {
 966         struct pcan_usb_fd_device *pdev =
 967                         container_of(dev, struct pcan_usb_fd_device, dev);
 968
 969         /* when rmmod called before unplug and if down, should reset things
 970          * before leaving
 971          */
 972         if (dev->can.state != CAN_STATE_STOPPED) {
 973                 /* set bus off on the corresponding channel */
 974                 pcan_usb_fd_set_bus(dev, 0);
 975         }
 976
 977         /* switch off corresponding CAN LEDs */
 978         pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
 979
 980         /* if channel #0 (only) */
 981         if (dev->ctrl_idx == 0) {
 982                 /* turn off calibration message if any device were opened */
 983                 if (pdev->usb_if->dev_opened_count > 0)
 984                         pcan_usb_fd_set_options(dev, 0,
 985                                                 PUCAN_OPTION_ERROR,
 986                                                 PCAN_UFD_FLTEXT_CALIBRATION);
 987
 988                 /* tell USB adapter that the driver is being unloaded */
 989                 pcan_usb_fd_drv_loaded(dev, 0);
 990         }
 991 }
 992
 993 /* called when the USB adapter is unplugged */
 994 static void pcan_usb_fd_free(struct peak_usb_device *dev)
 995 {
 996         /* last device: can free shared objects now */
 997         if (!dev->prev_siblings && !dev->next_siblings) {
 998                 struct pcan_usb_fd_device *pdev =
 999                         container_of(dev, struct pcan_usb_fd_device, dev);
1000
1001                 /* free commands buffer */
1002                 kfree(pdev->cmd_buffer_addr);
1003
1004                 /* free usb interface object */
1005                 kfree(pdev->usb_if);
1006         }
1007 }
1008
1009 /* describes the PCAN-USB FD adapter */
1010 static const struct can_bittiming_const pcan_usb_fd_const = {
1011         .name = "pcan_usb_fd",
1012         .tseg1_min = 1,
1013         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1014         .tseg2_min = 1,
1015         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1016         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1017         .brp_min = 1,
1018         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1019         .brp_inc = 1,
1020 };
1021
1022 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1023         .name = "pcan_usb_fd",
1024         .tseg1_min = 1,
1025         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1026         .tseg2_min = 1,
1027         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1028         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1029         .brp_min = 1,
1030         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1031         .brp_inc = 1,
1032 };
1033
1034 const struct peak_usb_adapter pcan_usb_fd = {
1035         .name = "PCAN-USB FD",
1036         .device_id = PCAN_USBFD_PRODUCT_ID,
1037         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1038         .ctrlmode_supported = CAN_CTRLMODE_FD |
1039                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1040         .clock = {
1041                 .freq = PCAN_UFD_CRYSTAL_HZ,
1042         },
1043         .bittiming_const = &pcan_usb_fd_const,
1044         .data_bittiming_const = &pcan_usb_fd_data_const,
1045
1046         /* size of device private data */
1047         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1048
1049         /* timestamps usage */
1050         .ts_used_bits = 32,
1051         .ts_period = 1000000, /* calibration period in ts. */
1052         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1053         .us_per_ts_shift = 0,
1054
1055         /* give here messages in/out endpoints */
1056         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1057         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1058
1059         /* size of rx/tx usb buffers */
1060         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1061         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1062
1063         /* device callbacks */
1064         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1065         .dev_init = pcan_usb_fd_init,
1066
1067         .dev_exit = pcan_usb_fd_exit,
1068         .dev_free = pcan_usb_fd_free,
1069         .dev_set_bus = pcan_usb_fd_set_bus,
1070         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1071         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1072         .dev_decode_buf = pcan_usb_fd_decode_buf,
1073         .dev_start = pcan_usb_fd_start,
1074         .dev_stop = pcan_usb_fd_stop,
1075         .dev_restart_async = pcan_usb_fd_restart_async,
1076         .dev_encode_msg = pcan_usb_fd_encode_msg,
1077
1078         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1079 };
1080
1081 /* describes the PCAN-CHIP USB */
1082 static const struct can_bittiming_const pcan_usb_chip_const = {
1083         .name = "pcan_chip_usb",
1084         .tseg1_min = 1,
1085         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1086         .tseg2_min = 1,
1087         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1088         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1089         .brp_min = 1,
1090         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1091         .brp_inc = 1,
1092 };
1093
1094 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1095         .name = "pcan_chip_usb",
1096         .tseg1_min = 1,
1097         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1098         .tseg2_min = 1,
1099         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1100         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1101         .brp_min = 1,
1102         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1103         .brp_inc = 1,
1104 };
1105
1106 const struct peak_usb_adapter pcan_usb_chip = {
1107         .name = "PCAN-Chip USB",
1108         .device_id = PCAN_USBCHIP_PRODUCT_ID,
1109         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1110         .ctrlmode_supported = CAN_CTRLMODE_FD |
1111                 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1112         .clock = {
1113                 .freq = PCAN_UFD_CRYSTAL_HZ,
1114         },
1115         .bittiming_const = &pcan_usb_chip_const,
1116         .data_bittiming_const = &pcan_usb_chip_data_const,
1117
1118         /* size of device private data */
1119         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1120
1121         /* timestamps usage */
1122         .ts_used_bits = 32,
1123         .ts_period = 1000000, /* calibration period in ts. */
1124         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1125         .us_per_ts_shift = 0,
1126
1127         /* give here messages in/out endpoints */
1128         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1129         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1130
1131         /* size of rx/tx usb buffers */
1132         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1133         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1134
1135         /* device callbacks */
1136         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1137         .dev_init = pcan_usb_fd_init,
1138
1139         .dev_exit = pcan_usb_fd_exit,
1140         .dev_free = pcan_usb_fd_free,
1141         .dev_set_bus = pcan_usb_fd_set_bus,
1142         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1143         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1144         .dev_decode_buf = pcan_usb_fd_decode_buf,
1145         .dev_start = pcan_usb_fd_start,
1146         .dev_stop = pcan_usb_fd_stop,
1147         .dev_restart_async = pcan_usb_fd_restart_async,
1148         .dev_encode_msg = pcan_usb_fd_encode_msg,
1149
1150         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1151 };
1152
1153 /* describes the PCAN-USB Pro FD adapter */
1154 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1155         .name = "pcan_usb_pro_fd",
1156         .tseg1_min = 1,
1157         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1158         .tseg2_min = 1,
1159         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1160         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1161         .brp_min = 1,
1162         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1163         .brp_inc = 1,
1164 };
1165
1166 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1167         .name = "pcan_usb_pro_fd",
1168         .tseg1_min = 1,
1169         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1170         .tseg2_min = 1,
1171         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1172         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1173         .brp_min = 1,
1174         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1175         .brp_inc = 1,
1176 };
1177
1178 const struct peak_usb_adapter pcan_usb_pro_fd = {
1179         .name = "PCAN-USB Pro FD",
1180         .device_id = PCAN_USBPROFD_PRODUCT_ID,
1181         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1182         .ctrlmode_supported = CAN_CTRLMODE_FD |
1183                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1184         .clock = {
1185                 .freq = PCAN_UFD_CRYSTAL_HZ,
1186         },
1187         .bittiming_const = &pcan_usb_pro_fd_const,
1188         .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1189
1190         /* size of device private data */
1191         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1192
1193         /* timestamps usage */
1194         .ts_used_bits = 32,
1195         .ts_period = 1000000, /* calibration period in ts. */
1196         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1197         .us_per_ts_shift = 0,
1198
1199         /* give here messages in/out endpoints */
1200         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1201         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1202
1203         /* size of rx/tx usb buffers */
1204         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1205         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1206
1207         /* device callbacks */
1208         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1209         .dev_init = pcan_usb_fd_init,
1210
1211         .dev_exit = pcan_usb_fd_exit,
1212         .dev_free = pcan_usb_fd_free,
1213         .dev_set_bus = pcan_usb_fd_set_bus,
1214         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1215         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1216         .dev_decode_buf = pcan_usb_fd_decode_buf,
1217         .dev_start = pcan_usb_fd_start,
1218         .dev_stop = pcan_usb_fd_stop,
1219         .dev_restart_async = pcan_usb_fd_restart_async,
1220         .dev_encode_msg = pcan_usb_fd_encode_msg,
1221
1222         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1223 };
1224
1225 /* describes the PCAN-USB X6 adapter */
1226 static const struct can_bittiming_const pcan_usb_x6_const = {
1227         .name = "pcan_usb_x6",
1228         .tseg1_min = 1,
1229         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1230         .tseg2_min = 1,
1231         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1232         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1233         .brp_min = 1,
1234         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1235         .brp_inc = 1,
1236 };
1237
1238 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1239         .name = "pcan_usb_x6",
1240         .tseg1_min = 1,
1241         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1242         .tseg2_min = 1,
1243         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1244         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1245         .brp_min = 1,
1246         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1247         .brp_inc = 1,
1248 };
1249
1250 const struct peak_usb_adapter pcan_usb_x6 = {
1251         .name = "PCAN-USB X6",
1252         .device_id = PCAN_USBX6_PRODUCT_ID,
1253         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1254         .ctrlmode_supported = CAN_CTRLMODE_FD |
1255                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1256         .clock = {
1257                 .freq = PCAN_UFD_CRYSTAL_HZ,
1258         },
1259         .bittiming_const = &pcan_usb_x6_const,
1260         .data_bittiming_const = &pcan_usb_x6_data_const,
1261
1262         /* size of device private data */
1263         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1264
1265         /* timestamps usage */
1266         .ts_used_bits = 32,
1267         .ts_period = 1000000, /* calibration period in ts. */
1268         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1269         .us_per_ts_shift = 0,
1270
1271         /* give here messages in/out endpoints */
1272         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1273         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1274
1275         /* size of rx/tx usb buffers */
1276         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1277         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1278
1279         /* device callbacks */
1280         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1281         .dev_init = pcan_usb_fd_init,
1282
1283         .dev_exit = pcan_usb_fd_exit,
1284         .dev_free = pcan_usb_fd_free,
1285         .dev_set_bus = pcan_usb_fd_set_bus,
1286         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1287         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1288         .dev_decode_buf = pcan_usb_fd_decode_buf,
1289         .dev_start = pcan_usb_fd_start,
1290         .dev_stop = pcan_usb_fd_stop,
1291         .dev_restart_async = pcan_usb_fd_restart_async,
1292         .dev_encode_msg = pcan_usb_fd_encode_msg,
1293
1294         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1295 };