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 #include <linux/ethtool.h>
  11
  12 #include <linux/can.h>
  13 #include <linux/can/dev.h>
  14 #include <linux/can/error.h>
  15 #include <linux/can/dev/peak_canfd.h>
  16
  17 #include "pcan_usb_core.h"
  18 #include "pcan_usb_pro.h"
  19
  20 #define PCAN_USBPROFD_CHANNEL_COUNT     2
  21 #define PCAN_USBFD_CHANNEL_COUNT        1
  22
  23 /* PCAN-USB Pro FD adapter internal clock (Hz) */
  24 #define PCAN_UFD_CRYSTAL_HZ             80000000
  25
  26 #define PCAN_UFD_CMD_BUFFER_SIZE        512
  27 #define PCAN_UFD_LOSPD_PKT_SIZE         64
  28
  29 /* PCAN-USB Pro FD command timeout (ms.) */
  30 #define PCAN_UFD_CMD_TIMEOUT_MS         1000
  31
  32 /* PCAN-USB Pro FD rx/tx buffers size */
  33 #define PCAN_UFD_RX_BUFFER_SIZE         2048
  34 #define PCAN_UFD_TX_BUFFER_SIZE         512
  35
  36 /* read some versions info from the hw device */
  37 struct __packed pcan_ufd_fw_info {
  38         __le16  size_of;        /* sizeof this */
  39         __le16  type;           /* type of this structure */
  40         u8      hw_type;        /* Type of hardware (HW_TYPE_xxx) */
  41         u8      bl_version[3];  /* Bootloader version */
  42         u8      hw_version;     /* Hardware version (PCB) */
  43         u8      fw_version[3];  /* Firmware version */
  44         __le32  dev_id[2];      /* "device id" per CAN */
  45         __le32  ser_no;         /* S/N */
  46         __le32  flags;          /* special functions */
  47 };
  48
  49 /* handle device specific info used by the netdevices */
  50 struct pcan_usb_fd_if {
  51         struct peak_usb_device  *dev[PCAN_USB_MAX_CHANNEL];
  52         struct pcan_ufd_fw_info fw_info;
  53         struct peak_time_ref    time_ref;
  54         int                     cm_ignore_count;
  55         int                     dev_opened_count;
  56 };
  57
  58 /* device information */
  59 struct pcan_usb_fd_device {
  60         struct peak_usb_device  dev;
  61         struct can_berr_counter bec;
  62         struct pcan_usb_fd_if   *usb_if;
  63         u8                      *cmd_buffer_addr;
  64 };
  65
  66 /* Extended USB commands (non uCAN commands) */
  67
  68 /* Clock Modes command */
  69 #define PCAN_UFD_CMD_CLK_SET            0x80
  70
  71 #define PCAN_UFD_CLK_80MHZ              0x0
  72 #define PCAN_UFD_CLK_60MHZ              0x1
  73 #define PCAN_UFD_CLK_40MHZ              0x2
  74 #define PCAN_UFD_CLK_30MHZ              0x3
  75 #define PCAN_UFD_CLK_24MHZ              0x4
  76 #define PCAN_UFD_CLK_20MHZ              0x5
  77 #define PCAN_UFD_CLK_DEF                PCAN_UFD_CLK_80MHZ
  78
  79 struct __packed pcan_ufd_clock {
  80         __le16  opcode_channel;
  81
  82         u8      mode;
  83         u8      unused[5];
  84 };
  85
  86 /* LED control command */
  87 #define PCAN_UFD_CMD_LED_SET            0x86
  88
  89 #define PCAN_UFD_LED_DEV                0x00
  90 #define PCAN_UFD_LED_FAST               0x01
  91 #define PCAN_UFD_LED_SLOW               0x02
  92 #define PCAN_UFD_LED_ON                 0x03
  93 #define PCAN_UFD_LED_OFF                0x04
  94 #define PCAN_UFD_LED_DEF                PCAN_UFD_LED_DEV
  95
  96 struct __packed pcan_ufd_led {
  97         __le16  opcode_channel;
  98
  99         u8      mode;
 100         u8      unused[5];
 101 };
 102
 103 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
 104 #define PCAN_UFD_FLTEXT_CALIBRATION     0x8000
 105
 106 struct __packed pcan_ufd_options {
 107         __le16  opcode_channel;
 108
 109         __le16  ucan_mask;
 110         u16     unused;
 111         __le16  usb_mask;
 112 };
 113
 114 /* Extended usage of uCAN messages for PCAN-USB Pro FD */
 115 #define PCAN_UFD_MSG_CALIBRATION        0x100
 116
 117 struct __packed pcan_ufd_ts_msg {
 118         __le16  size;
 119         __le16  type;
 120         __le32  ts_low;
 121         __le32  ts_high;
 122         __le16  usb_frame_index;
 123         u16     unused;
 124 };
 125
 126 #define PCAN_UFD_MSG_OVERRUN            0x101
 127
 128 #define PCAN_UFD_OVMSG_CHANNEL(o)       ((o)->channel & 0xf)
 129
 130 struct __packed pcan_ufd_ovr_msg {
 131         __le16  size;
 132         __le16  type;
 133         __le32  ts_low;
 134         __le32  ts_high;
 135         u8      channel;
 136         u8      unused[3];
 137 };
 138
 139 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
 140 {
 141         return om->channel & 0xf;
 142 }
 143
 144 /* Clock mode frequency values */
 145 static const u32 pcan_usb_fd_clk_freq[6] = {
 146         [PCAN_UFD_CLK_80MHZ] = 80000000,
 147         [PCAN_UFD_CLK_60MHZ] = 60000000,
 148         [PCAN_UFD_CLK_40MHZ] = 40000000,
 149         [PCAN_UFD_CLK_30MHZ] = 30000000,
 150         [PCAN_UFD_CLK_24MHZ] = 24000000,
 151         [PCAN_UFD_CLK_20MHZ] = 20000000
 152 };
 153
 154 /* return a device USB interface */
 155 static inline
 156 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev)
 157 {
 158         struct pcan_usb_fd_device *pdev =
 159                         container_of(dev, struct pcan_usb_fd_device, dev);
 160         return pdev->usb_if;
 161 }
 162
 163 /* return a device USB commands buffer */
 164 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
 165 {
 166         struct pcan_usb_fd_device *pdev =
 167                         container_of(dev, struct pcan_usb_fd_device, dev);
 168         return pdev->cmd_buffer_addr;
 169 }
 170
 171 /* send PCAN-USB Pro FD commands synchronously */
 172 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
 173 {
 174         void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
 175         int err = 0;
 176         u8 *packet_ptr;
 177         int packet_len;
 178         ptrdiff_t cmd_len;
 179
 180         /* usb device unregistered? */
 181         if (!(dev->state & PCAN_USB_STATE_CONNECTED))
 182                 return 0;
 183
 184         /* if a packet is not filled completely by commands, the command list
 185          * is terminated with an "end of collection" record.
 186          */
 187         cmd_len = cmd_tail - cmd_head;
 188         if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
 189                 memset(cmd_tail, 0xff, sizeof(u64));
 190                 cmd_len += sizeof(u64);
 191         }
 192
 193         packet_ptr = cmd_head;
 194         packet_len = cmd_len;
 195
 196         /* firmware is not able to re-assemble 512 bytes buffer in full-speed */
 197         if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
 198                 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
 199
 200         do {
 201                 err = usb_bulk_msg(dev->udev,
 202                                    usb_sndbulkpipe(dev->udev,
 203                                                    PCAN_USBPRO_EP_CMDOUT),
 204                                    packet_ptr, packet_len,
 205                                    NULL, PCAN_UFD_CMD_TIMEOUT_MS);
 206                 if (err) {
 207                         netdev_err(dev->netdev,
 208                                    "sending command failure: %d\n", err);
 209                         break;
 210                 }
 211
 212                 packet_ptr += packet_len;
 213                 cmd_len -= packet_len;
 214
 215                 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
 216                         packet_len = cmd_len;
 217
 218         } while (packet_len > 0);
 219
 220         return err;
 221 }
 222
 223 /* build the commands list in the given buffer, to enter operational mode */
 224 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
 225 {
 226         struct pucan_wr_err_cnt *prc;
 227         struct pucan_command *cmd;
 228         u8 *pc = buf;
 229
 230         /* 1st, reset error counters: */
 231         prc = (struct pucan_wr_err_cnt *)pc;
 232         prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 233                                                        PUCAN_CMD_WR_ERR_CNT);
 234
 235         /* select both counters */
 236         prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
 237
 238         /* and reset their values */
 239         prc->tx_counter = 0;
 240         prc->rx_counter = 0;
 241
 242         /* moves the pointer forward */
 243         pc += sizeof(struct pucan_wr_err_cnt);
 244
 245         /* add command to switch from ISO to non-ISO mode, if fw allows it */
 246         if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
 247                 struct pucan_options *puo = (struct pucan_options *)pc;
 248
 249                 puo->opcode_channel =
 250                         (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
 251                         pucan_cmd_opcode_channel(dev->ctrl_idx,
 252                                                  PUCAN_CMD_CLR_DIS_OPTION) :
 253                         pucan_cmd_opcode_channel(dev->ctrl_idx,
 254                                                  PUCAN_CMD_SET_EN_OPTION);
 255
 256                 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
 257
 258                 /* to be sure that no other extended bits will be taken into
 259                  * account
 260                  */
 261                 puo->unused = 0;
 262
 263                 /* moves the pointer forward */
 264                 pc += sizeof(struct pucan_options);
 265         }
 266
 267         /* next, go back to operational mode */
 268         cmd = (struct pucan_command *)pc;
 269         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 270                                 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
 271                                                 PUCAN_CMD_LISTEN_ONLY_MODE :
 272                                                 PUCAN_CMD_NORMAL_MODE);
 273         pc += sizeof(struct pucan_command);
 274
 275         return pc - buf;
 276 }
 277
 278 /* set CAN bus on/off */
 279 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
 280 {
 281         u8 *pc = pcan_usb_fd_cmd_buffer(dev);
 282         int l;
 283
 284         if (onoff) {
 285                 /* build the cmds list to enter operational mode */
 286                 l = pcan_usb_fd_build_restart_cmd(dev, pc);
 287         } else {
 288                 struct pucan_command *cmd = (struct pucan_command *)pc;
 289
 290                 /* build cmd to go back to reset mode */
 291                 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 292                                                         PUCAN_CMD_RESET_MODE);
 293                 l = sizeof(struct pucan_command);
 294         }
 295
 296         /* send the command */
 297         return pcan_usb_fd_send_cmd(dev, pc + l);
 298 }
 299
 300 /* set filtering masks:
 301  *
 302  *      idx  in range [0..63] selects a row #idx, all rows otherwise
 303  *      mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
 304  *
 305  *      Each bit of this 64 x 32 bits array defines a CANID value:
 306  *
 307  *      bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
 308  *      bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
 309  */
 310 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
 311                                       u32 mask)
 312 {
 313         struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
 314         int i, n;
 315
 316         /* select all rows when idx is out of range [0..63] */
 317         if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
 318                 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
 319                 idx = 0;
 320
 321         /* select the row (and only the row) otherwise */
 322         } else {
 323                 n = idx + 1;
 324         }
 325
 326         for (i = idx; i < n; i++, cmd++) {
 327                 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 328                                                         PUCAN_CMD_FILTER_STD);
 329                 cmd->idx = cpu_to_le16(i);
 330                 cmd->mask = cpu_to_le32(mask);
 331         }
 332
 333         /* send the command */
 334         return pcan_usb_fd_send_cmd(dev, cmd);
 335 }
 336
 337 /* set/unset options
 338  *
 339  *      onoff   set(1)/unset(0) options
 340  *      mask    each bit defines a kind of options to set/unset
 341  */
 342 static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
 343                                    bool onoff, u16 ucan_mask, u16 usb_mask)
 344 {
 345         struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
 346
 347         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 348                                         (onoff) ? PUCAN_CMD_SET_EN_OPTION :
 349                                                   PUCAN_CMD_CLR_DIS_OPTION);
 350
 351         cmd->ucan_mask = cpu_to_le16(ucan_mask);
 352         cmd->usb_mask = cpu_to_le16(usb_mask);
 353
 354         /* send the command */
 355         return pcan_usb_fd_send_cmd(dev, ++cmd);
 356 }
 357
 358 /* setup LED control */
 359 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
 360 {
 361         struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
 362
 363         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 364                                                        PCAN_UFD_CMD_LED_SET);
 365         cmd->mode = led_mode;
 366
 367         /* send the command */
 368         return pcan_usb_fd_send_cmd(dev, ++cmd);
 369 }
 370
 371 /* set CAN clock domain */
 372 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
 373                                         u8 clk_mode)
 374 {
 375         struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
 376
 377         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 378                                                        PCAN_UFD_CMD_CLK_SET);
 379         cmd->mode = clk_mode;
 380
 381         /* send the command */
 382         return pcan_usb_fd_send_cmd(dev, ++cmd);
 383 }
 384
 385 /* set bittiming for CAN and CAN-FD header */
 386 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
 387                                           struct can_bittiming *bt)
 388 {
 389         struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
 390
 391         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 392                                                        PUCAN_CMD_TIMING_SLOW);
 393         cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
 394                                 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
 395
 396         cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
 397         cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
 398         cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
 399
 400         cmd->ewl = 96;  /* default */
 401
 402         /* send the command */
 403         return pcan_usb_fd_send_cmd(dev, ++cmd);
 404 }
 405
 406 /* set CAN-FD bittiming for data */
 407 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
 408                                           struct can_bittiming *bt)
 409 {
 410         struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
 411
 412         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 413                                                        PUCAN_CMD_TIMING_FAST);
 414         cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
 415         cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
 416         cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
 417         cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
 418
 419         /* send the command */
 420         return pcan_usb_fd_send_cmd(dev, ++cmd);
 421 }
 422
 423 /* handle restart but in asynchronously way
 424  * (uses PCAN-USB Pro code to complete asynchronous request)
 425  */
 426 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
 427                                      struct urb *urb, u8 *buf)
 428 {
 429         u8 *pc = buf;
 430
 431         /* build the entire cmds list in the provided buffer, to go back into
 432          * operational mode.
 433          */
 434         pc += pcan_usb_fd_build_restart_cmd(dev, pc);
 435
 436         /* add EOC */
 437         memset(pc, 0xff, sizeof(struct pucan_command));
 438         pc += sizeof(struct pucan_command);
 439
 440         /* complete the URB */
 441         usb_fill_bulk_urb(urb, dev->udev,
 442                           usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
 443                           buf, pc - buf,
 444                           pcan_usb_pro_restart_complete, dev);
 445
 446         /* and submit it. */
 447         return usb_submit_urb(urb, GFP_ATOMIC);
 448 }
 449
 450 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
 451 {
 452         struct pcan_usb_fd_device *pdev =
 453                         container_of(dev, struct pcan_usb_fd_device, dev);
 454
 455         pdev->cmd_buffer_addr[0] = 0;
 456         pdev->cmd_buffer_addr[1] = !!loaded;
 457
 458         return pcan_usb_pro_send_req(dev,
 459                                 PCAN_USBPRO_REQ_FCT,
 460                                 PCAN_USBPRO_FCT_DRVLD,
 461                                 pdev->cmd_buffer_addr,
 462                                 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
 463 }
 464
 465 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
 466                                      struct pucan_msg *rx_msg)
 467 {
 468         struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
 469         struct peak_usb_device *dev;
 470         struct net_device *netdev;
 471         struct canfd_frame *cfd;
 472         struct sk_buff *skb;
 473         const u16 rx_msg_flags = le16_to_cpu(rm->flags);
 474
 475         if (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev))
 476                 return -ENOMEM;
 477
 478         dev = usb_if->dev[pucan_msg_get_channel(rm)];
 479         netdev = dev->netdev;
 480
 481         if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
 482                 /* CANFD frame case */
 483                 skb = alloc_canfd_skb(netdev, &cfd);
 484                 if (!skb)
 485                         return -ENOMEM;
 486
 487                 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
 488                         cfd->flags |= CANFD_BRS;
 489
 490                 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
 491                         cfd->flags |= CANFD_ESI;
 492
 493                 cfd->len = can_fd_dlc2len(pucan_msg_get_dlc(rm));
 494         } else {
 495                 /* CAN 2.0 frame case */
 496                 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
 497                 if (!skb)
 498                         return -ENOMEM;
 499
 500                 can_frame_set_cc_len((struct can_frame *)cfd,
 501                                      pucan_msg_get_dlc(rm),
 502                                      dev->can.ctrlmode);
 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         netdev->stats.rx_packets++;
 516         netdev->stats.rx_bytes += cfd->len;
 517
 518         peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low));
 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                 /* back to (or still in) ERROR_ACTIVE state */
 555                 new_state = CAN_STATE_ERROR_ACTIVE;
 556                 pdev->bec.txerr = 0;
 557                 pdev->bec.rxerr = 0;
 558         }
 559
 560         /* state hasn't changed */
 561         if (new_state == dev->can.state)
 562                 return 0;
 563
 564         /* handle bus state change */
 565         tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
 566         rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
 567
 568         /* allocate an skb to store the error frame */
 569         skb = alloc_can_err_skb(netdev, &cf);
 570         can_change_state(netdev, cf, tx_state, rx_state);
 571
 572         /* things must be done even in case of OOM */
 573         if (new_state == CAN_STATE_BUS_OFF)
 574                 can_bus_off(netdev);
 575
 576         if (!skb)
 577                 return -ENOMEM;
 578
 579         netdev->stats.rx_packets++;
 580         netdev->stats.rx_bytes += cf->len;
 581
 582         peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low));
 583
 584         return 0;
 585 }
 586
 587 /* handle uCAN error message */
 588 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
 589                                     struct pucan_msg *rx_msg)
 590 {
 591         struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
 592         struct pcan_usb_fd_device *pdev;
 593         struct peak_usb_device *dev;
 594
 595         if (pucan_ermsg_get_channel(er) >= ARRAY_SIZE(usb_if->dev))
 596                 return -EINVAL;
 597
 598         dev = usb_if->dev[pucan_ermsg_get_channel(er)];
 599         pdev = container_of(dev, struct pcan_usb_fd_device, dev);
 600
 601         /* keep a trace of tx and rx error counters for later use */
 602         pdev->bec.txerr = er->tx_err_cnt;
 603         pdev->bec.rxerr = er->rx_err_cnt;
 604
 605         return 0;
 606 }
 607
 608 /* handle uCAN overrun message */
 609 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
 610                                       struct pucan_msg *rx_msg)
 611 {
 612         struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
 613         struct peak_usb_device *dev;
 614         struct net_device *netdev;
 615         struct can_frame *cf;
 616         struct sk_buff *skb;
 617
 618         if (pufd_omsg_get_channel(ov) >= ARRAY_SIZE(usb_if->dev))
 619                 return -EINVAL;
 620
 621         dev = usb_if->dev[pufd_omsg_get_channel(ov)];
 622         netdev = dev->netdev;
 623
 624         /* allocate an skb to store the error frame */
 625         skb = alloc_can_err_skb(netdev, &cf);
 626         if (!skb)
 627                 return -ENOMEM;
 628
 629         cf->can_id |= CAN_ERR_CRTL;
 630         cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
 631
 632         peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low));
 633
 634         netdev->stats.rx_over_errors++;
 635         netdev->stats.rx_errors++;
 636
 637         return 0;
 638 }
 639
 640 /* handle USB calibration message */
 641 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
 642                                   struct pucan_msg *rx_msg)
 643 {
 644         struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
 645
 646         /* should wait until clock is stabilized */
 647         if (usb_if->cm_ignore_count > 0)
 648                 usb_if->cm_ignore_count--;
 649         else
 650                 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
 651 }
 652
 653 /* callback for bulk IN urb */
 654 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
 655 {
 656         struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
 657         struct net_device *netdev = dev->netdev;
 658         struct pucan_msg *rx_msg;
 659         u8 *msg_ptr, *msg_end;
 660         int err = 0;
 661
 662         /* loop reading all the records from the incoming message */
 663         msg_ptr = urb->transfer_buffer;
 664         msg_end = urb->transfer_buffer + urb->actual_length;
 665         for (; msg_ptr < msg_end;) {
 666                 u16 rx_msg_type, rx_msg_size;
 667
 668                 rx_msg = (struct pucan_msg *)msg_ptr;
 669                 if (!rx_msg->size) {
 670                         /* null packet found: end of list */
 671                         break;
 672                 }
 673
 674                 rx_msg_size = le16_to_cpu(rx_msg->size);
 675                 rx_msg_type = le16_to_cpu(rx_msg->type);
 676
 677                 /* check if the record goes out of current packet */
 678                 if (msg_ptr + rx_msg_size > msg_end) {
 679                         netdev_err(netdev,
 680                                    "got frag rec: should inc usb rx buf sze\n");
 681                         err = -EBADMSG;
 682                         break;
 683                 }
 684
 685                 switch (rx_msg_type) {
 686                 case PUCAN_MSG_CAN_RX:
 687                         err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
 688                         if (err < 0)
 689                                 goto fail;
 690                         break;
 691
 692                 case PCAN_UFD_MSG_CALIBRATION:
 693                         pcan_usb_fd_decode_ts(usb_if, rx_msg);
 694                         break;
 695
 696                 case PUCAN_MSG_ERROR:
 697                         err = pcan_usb_fd_decode_error(usb_if, rx_msg);
 698                         if (err < 0)
 699                                 goto fail;
 700                         break;
 701
 702                 case PUCAN_MSG_STATUS:
 703                         err = pcan_usb_fd_decode_status(usb_if, rx_msg);
 704                         if (err < 0)
 705                                 goto fail;
 706                         break;
 707
 708                 case PCAN_UFD_MSG_OVERRUN:
 709                         err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
 710                         if (err < 0)
 711                                 goto fail;
 712                         break;
 713
 714                 default:
 715                         netdev_err(netdev,
 716                                    "unhandled msg type 0x%02x (%d): ignored\n",
 717                                    rx_msg_type, rx_msg_type);
 718                         break;
 719                 }
 720
 721                 msg_ptr += rx_msg_size;
 722         }
 723
 724 fail:
 725         if (err)
 726                 pcan_dump_mem("received msg",
 727                               urb->transfer_buffer, urb->actual_length);
 728         return err;
 729 }
 730
 731 /* CAN/CANFD frames encoding callback */
 732 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
 733                                   struct sk_buff *skb, u8 *obuf, size_t *size)
 734 {
 735         struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
 736         struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
 737         u16 tx_msg_size, tx_msg_flags;
 738         u8 dlc;
 739
 740         if (cfd->len > CANFD_MAX_DLEN)
 741                 return -EINVAL;
 742
 743         tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
 744         tx_msg->size = cpu_to_le16(tx_msg_size);
 745         tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
 746
 747         tx_msg_flags = 0;
 748         if (cfd->can_id & CAN_EFF_FLAG) {
 749                 tx_msg_flags |= PUCAN_MSG_EXT_ID;
 750                 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
 751         } else {
 752                 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
 753         }
 754
 755         if (can_is_canfd_skb(skb)) {
 756                 /* considering a CANFD frame */
 757                 dlc = can_fd_len2dlc(cfd->len);
 758
 759                 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
 760
 761                 if (cfd->flags & CANFD_BRS)
 762                         tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
 763
 764                 if (cfd->flags & CANFD_ESI)
 765                         tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
 766         } else {
 767                 /* CAND 2.0 frames */
 768                 dlc = can_get_cc_dlc((struct can_frame *)cfd,
 769                                      dev->can.ctrlmode);
 770
 771                 if (cfd->can_id & CAN_RTR_FLAG)
 772                         tx_msg_flags |= PUCAN_MSG_RTR;
 773         }
 774
 775         /* Single-Shot frame */
 776         if (dev->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
 777                 tx_msg_flags |= PUCAN_MSG_SINGLE_SHOT;
 778
 779         tx_msg->flags = cpu_to_le16(tx_msg_flags);
 780         tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, dlc);
 781         memcpy(tx_msg->d, cfd->data, cfd->len);
 782
 783         /* add null size message to tag the end (messages are 32-bits aligned)
 784          */
 785         tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
 786
 787         tx_msg->size = 0;
 788
 789         /* set the whole size of the USB packet to send */
 790         *size = tx_msg_size + sizeof(u32);
 791
 792         return 0;
 793 }
 794
 795 /* start the interface (last chance before set bus on) */
 796 static int pcan_usb_fd_start(struct peak_usb_device *dev)
 797 {
 798         struct pcan_usb_fd_device *pdev =
 799                         container_of(dev, struct pcan_usb_fd_device, dev);
 800         int err;
 801
 802         /* set filter mode: all acceptance */
 803         err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
 804         if (err)
 805                 return err;
 806
 807         /* opening first device: */
 808         if (pdev->usb_if->dev_opened_count == 0) {
 809                 /* reset time_ref */
 810                 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
 811                                        &pcan_usb_pro_fd);
 812
 813                 /* enable USB calibration messages */
 814                 err = pcan_usb_fd_set_options(dev, 1,
 815                                               PUCAN_OPTION_ERROR,
 816                                               PCAN_UFD_FLTEXT_CALIBRATION);
 817         }
 818
 819         pdev->usb_if->dev_opened_count++;
 820
 821         /* reset cached error counters */
 822         pdev->bec.txerr = 0;
 823         pdev->bec.rxerr = 0;
 824
 825         return err;
 826 }
 827
 828 /* socket callback used to copy berr counters values received through USB */
 829 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
 830                                         struct can_berr_counter *bec)
 831 {
 832         struct peak_usb_device *dev = netdev_priv(netdev);
 833         struct pcan_usb_fd_device *pdev =
 834                         container_of(dev, struct pcan_usb_fd_device, dev);
 835
 836         *bec = pdev->bec;
 837
 838         /* must return 0 */
 839         return 0;
 840 }
 841
 842 /* stop interface (last chance before set bus off) */
 843 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
 844 {
 845         struct pcan_usb_fd_device *pdev =
 846                         container_of(dev, struct pcan_usb_fd_device, dev);
 847
 848         /* turn off special msgs for that interface if no other dev opened */
 849         if (pdev->usb_if->dev_opened_count == 1)
 850                 pcan_usb_fd_set_options(dev, 0,
 851                                         PUCAN_OPTION_ERROR,
 852                                         PCAN_UFD_FLTEXT_CALIBRATION);
 853         pdev->usb_if->dev_opened_count--;
 854
 855         return 0;
 856 }
 857
 858 /* called when probing, to initialize a device object */
 859 static int pcan_usb_fd_init(struct peak_usb_device *dev)
 860 {
 861         struct pcan_usb_fd_device *pdev =
 862                         container_of(dev, struct pcan_usb_fd_device, dev);
 863         int i, err = -ENOMEM;
 864
 865         /* do this for 1st channel only */
 866         if (!dev->prev_siblings) {
 867                 /* allocate netdevices common structure attached to first one */
 868                 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
 869                 if (!pdev->usb_if)
 870                         goto err_out;
 871
 872                 /* allocate command buffer once for all for the interface */
 873                 pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
 874                                                 GFP_KERNEL);
 875                 if (!pdev->cmd_buffer_addr)
 876                         goto err_out_1;
 877
 878                 /* number of ts msgs to ignore before taking one into account */
 879                 pdev->usb_if->cm_ignore_count = 5;
 880
 881                 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
 882                                             PCAN_USBPRO_INFO_FW,
 883                                             &pdev->usb_if->fw_info,
 884                                             sizeof(pdev->usb_if->fw_info));
 885                 if (err) {
 886                         dev_err(dev->netdev->dev.parent,
 887                                 "unable to read %s firmware info (err %d)\n",
 888                                 dev->adapter->name, err);
 889                         goto err_out_2;
 890                 }
 891
 892                 /* explicit use of dev_xxx() instead of netdev_xxx() here:
 893                  * information displayed are related to the device itself, not
 894                  * to the canx (channel) device.
 895                  */
 896                 dev_info(dev->netdev->dev.parent,
 897                          "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
 898                          dev->adapter->name, pdev->usb_if->fw_info.hw_version,
 899                          pdev->usb_if->fw_info.fw_version[0],
 900                          pdev->usb_if->fw_info.fw_version[1],
 901                          pdev->usb_if->fw_info.fw_version[2],
 902                          dev->adapter->ctrl_count);
 903
 904                 /* check for ability to switch between ISO/non-ISO modes */
 905                 if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
 906                         /* firmware >= 2.x supports ISO/non-ISO switching */
 907                         dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
 908                 } else {
 909                         /* firmware < 2.x only supports fixed(!) non-ISO */
 910                         dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
 911                 }
 912
 913                 /* tell the hardware the can driver is running */
 914                 err = pcan_usb_fd_drv_loaded(dev, 1);
 915                 if (err) {
 916                         dev_err(dev->netdev->dev.parent,
 917                                 "unable to tell %s driver is loaded (err %d)\n",
 918                                 dev->adapter->name, err);
 919                         goto err_out_2;
 920                 }
 921         } else {
 922                 /* otherwise, simply copy previous sibling's values */
 923                 struct pcan_usb_fd_device *ppdev =
 924                         container_of(dev->prev_siblings,
 925                                      struct pcan_usb_fd_device, dev);
 926
 927                 pdev->usb_if = ppdev->usb_if;
 928                 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
 929
 930                 /* do a copy of the ctrlmode[_supported] too */
 931                 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
 932                 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
 933         }
 934
 935         pdev->usb_if->dev[dev->ctrl_idx] = dev;
 936         dev->device_number =
 937                 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
 938
 939         /* set clock domain */
 940         for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
 941                 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
 942                         break;
 943
 944         if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
 945                 dev_warn(dev->netdev->dev.parent,
 946                          "incompatible clock frequencies\n");
 947                 err = -EINVAL;
 948                 goto err_out_2;
 949         }
 950
 951         pcan_usb_fd_set_clock_domain(dev, i);
 952
 953         /* set LED in default state (end of init phase) */
 954         pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
 955
 956         return 0;
 957
 958 err_out_2:
 959         kfree(pdev->cmd_buffer_addr);
 960 err_out_1:
 961         kfree(pdev->usb_if);
 962 err_out:
 963         return err;
 964 }
 965
 966 /* called when driver module is being unloaded */
 967 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
 968 {
 969         struct pcan_usb_fd_device *pdev =
 970                         container_of(dev, struct pcan_usb_fd_device, dev);
 971
 972         /* when rmmod called before unplug and if down, should reset things
 973          * before leaving
 974          */
 975         if (dev->can.state != CAN_STATE_STOPPED) {
 976                 /* set bus off on the corresponding channel */
 977                 pcan_usb_fd_set_bus(dev, 0);
 978         }
 979
 980         /* switch off corresponding CAN LEDs */
 981         pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
 982
 983         /* if channel #0 (only) */
 984         if (dev->ctrl_idx == 0) {
 985                 /* turn off calibration message if any device were opened */
 986                 if (pdev->usb_if->dev_opened_count > 0)
 987                         pcan_usb_fd_set_options(dev, 0,
 988                                                 PUCAN_OPTION_ERROR,
 989                                                 PCAN_UFD_FLTEXT_CALIBRATION);
 990
 991                 /* tell USB adapter that the driver is being unloaded */
 992                 pcan_usb_fd_drv_loaded(dev, 0);
 993         }
 994 }
 995
 996 /* called when the USB adapter is unplugged */
 997 static void pcan_usb_fd_free(struct peak_usb_device *dev)
 998 {
 999         /* last device: can free shared objects now */
1000         if (!dev->prev_siblings && !dev->next_siblings) {
1001                 struct pcan_usb_fd_device *pdev =
1002                         container_of(dev, struct pcan_usb_fd_device, dev);
1003
1004                 /* free commands buffer */
1005                 kfree(pdev->cmd_buffer_addr);
1006
1007                 /* free usb interface object */
1008                 kfree(pdev->usb_if);
1009         }
1010 }
1011
1012 /* blink LED's */
1013 static int pcan_usb_fd_set_phys_id(struct net_device *netdev,
1014                                    enum ethtool_phys_id_state state)
1015 {
1016         struct peak_usb_device *dev = netdev_priv(netdev);
1017         int err = 0;
1018
1019         switch (state) {
1020         case ETHTOOL_ID_ACTIVE:
1021                 err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_FAST);
1022                 break;
1023         case ETHTOOL_ID_INACTIVE:
1024                 err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
1025                 break;
1026         default:
1027                 break;
1028         }
1029
1030         return err;
1031 }
1032
1033 static const struct ethtool_ops pcan_usb_fd_ethtool_ops = {
1034         .set_phys_id = pcan_usb_fd_set_phys_id,
1035 };
1036
1037 /* describes the PCAN-USB FD adapter */
1038 static const struct can_bittiming_const pcan_usb_fd_const = {
1039         .name = "pcan_usb_fd",
1040         .tseg1_min = 1,
1041         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1042         .tseg2_min = 1,
1043         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1044         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1045         .brp_min = 1,
1046         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1047         .brp_inc = 1,
1048 };
1049
1050 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1051         .name = "pcan_usb_fd",
1052         .tseg1_min = 1,
1053         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1054         .tseg2_min = 1,
1055         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1056         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1057         .brp_min = 1,
1058         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1059         .brp_inc = 1,
1060 };
1061
1062 const struct peak_usb_adapter pcan_usb_fd = {
1063         .name = "PCAN-USB FD",
1064         .device_id = PCAN_USBFD_PRODUCT_ID,
1065         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1066         .ctrlmode_supported = CAN_CTRLMODE_FD |
1067                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1068                         CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1069         .clock = {
1070                 .freq = PCAN_UFD_CRYSTAL_HZ,
1071         },
1072         .bittiming_const = &pcan_usb_fd_const,
1073         .data_bittiming_const = &pcan_usb_fd_data_const,
1074
1075         /* size of device private data */
1076         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1077
1078         .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1079
1080         /* timestamps usage */
1081         .ts_used_bits = 32,
1082         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1083         .us_per_ts_shift = 0,
1084
1085         /* give here messages in/out endpoints */
1086         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1087         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1088
1089         /* size of rx/tx usb buffers */
1090         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1091         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1092
1093         /* device callbacks */
1094         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1095         .dev_init = pcan_usb_fd_init,
1096
1097         .dev_exit = pcan_usb_fd_exit,
1098         .dev_free = pcan_usb_fd_free,
1099         .dev_set_bus = pcan_usb_fd_set_bus,
1100         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1101         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1102         .dev_decode_buf = pcan_usb_fd_decode_buf,
1103         .dev_start = pcan_usb_fd_start,
1104         .dev_stop = pcan_usb_fd_stop,
1105         .dev_restart_async = pcan_usb_fd_restart_async,
1106         .dev_encode_msg = pcan_usb_fd_encode_msg,
1107
1108         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1109 };
1110
1111 /* describes the PCAN-CHIP USB */
1112 static const struct can_bittiming_const pcan_usb_chip_const = {
1113         .name = "pcan_chip_usb",
1114         .tseg1_min = 1,
1115         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1116         .tseg2_min = 1,
1117         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1118         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1119         .brp_min = 1,
1120         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1121         .brp_inc = 1,
1122 };
1123
1124 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1125         .name = "pcan_chip_usb",
1126         .tseg1_min = 1,
1127         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1128         .tseg2_min = 1,
1129         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1130         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1131         .brp_min = 1,
1132         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1133         .brp_inc = 1,
1134 };
1135
1136 const struct peak_usb_adapter pcan_usb_chip = {
1137         .name = "PCAN-Chip USB",
1138         .device_id = PCAN_USBCHIP_PRODUCT_ID,
1139         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1140         .ctrlmode_supported = CAN_CTRLMODE_FD |
1141                 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1142                 CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1143         .clock = {
1144                 .freq = PCAN_UFD_CRYSTAL_HZ,
1145         },
1146         .bittiming_const = &pcan_usb_chip_const,
1147         .data_bittiming_const = &pcan_usb_chip_data_const,
1148
1149         /* size of device private data */
1150         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1151
1152         .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1153
1154         /* timestamps usage */
1155         .ts_used_bits = 32,
1156         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1157         .us_per_ts_shift = 0,
1158
1159         /* give here messages in/out endpoints */
1160         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1161         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1162
1163         /* size of rx/tx usb buffers */
1164         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1165         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1166
1167         /* device callbacks */
1168         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1169         .dev_init = pcan_usb_fd_init,
1170
1171         .dev_exit = pcan_usb_fd_exit,
1172         .dev_free = pcan_usb_fd_free,
1173         .dev_set_bus = pcan_usb_fd_set_bus,
1174         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1175         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1176         .dev_decode_buf = pcan_usb_fd_decode_buf,
1177         .dev_start = pcan_usb_fd_start,
1178         .dev_stop = pcan_usb_fd_stop,
1179         .dev_restart_async = pcan_usb_fd_restart_async,
1180         .dev_encode_msg = pcan_usb_fd_encode_msg,
1181
1182         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1183 };
1184
1185 /* describes the PCAN-USB Pro FD adapter */
1186 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1187         .name = "pcan_usb_pro_fd",
1188         .tseg1_min = 1,
1189         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1190         .tseg2_min = 1,
1191         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1192         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1193         .brp_min = 1,
1194         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1195         .brp_inc = 1,
1196 };
1197
1198 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1199         .name = "pcan_usb_pro_fd",
1200         .tseg1_min = 1,
1201         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1202         .tseg2_min = 1,
1203         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1204         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1205         .brp_min = 1,
1206         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1207         .brp_inc = 1,
1208 };
1209
1210 const struct peak_usb_adapter pcan_usb_pro_fd = {
1211         .name = "PCAN-USB Pro FD",
1212         .device_id = PCAN_USBPROFD_PRODUCT_ID,
1213         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1214         .ctrlmode_supported = CAN_CTRLMODE_FD |
1215                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1216                         CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1217         .clock = {
1218                 .freq = PCAN_UFD_CRYSTAL_HZ,
1219         },
1220         .bittiming_const = &pcan_usb_pro_fd_const,
1221         .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1222
1223         /* size of device private data */
1224         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1225
1226         .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1227
1228         /* timestamps usage */
1229         .ts_used_bits = 32,
1230         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1231         .us_per_ts_shift = 0,
1232
1233         /* give here messages in/out endpoints */
1234         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1235         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1236
1237         /* size of rx/tx usb buffers */
1238         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1239         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1240
1241         /* device callbacks */
1242         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1243         .dev_init = pcan_usb_fd_init,
1244
1245         .dev_exit = pcan_usb_fd_exit,
1246         .dev_free = pcan_usb_fd_free,
1247         .dev_set_bus = pcan_usb_fd_set_bus,
1248         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1249         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1250         .dev_decode_buf = pcan_usb_fd_decode_buf,
1251         .dev_start = pcan_usb_fd_start,
1252         .dev_stop = pcan_usb_fd_stop,
1253         .dev_restart_async = pcan_usb_fd_restart_async,
1254         .dev_encode_msg = pcan_usb_fd_encode_msg,
1255
1256         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1257 };
1258
1259 /* describes the PCAN-USB X6 adapter */
1260 static const struct can_bittiming_const pcan_usb_x6_const = {
1261         .name = "pcan_usb_x6",
1262         .tseg1_min = 1,
1263         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1264         .tseg2_min = 1,
1265         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1266         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1267         .brp_min = 1,
1268         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1269         .brp_inc = 1,
1270 };
1271
1272 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1273         .name = "pcan_usb_x6",
1274         .tseg1_min = 1,
1275         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1276         .tseg2_min = 1,
1277         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1278         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1279         .brp_min = 1,
1280         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1281         .brp_inc = 1,
1282 };
1283
1284 const struct peak_usb_adapter pcan_usb_x6 = {
1285         .name = "PCAN-USB X6",
1286         .device_id = PCAN_USBX6_PRODUCT_ID,
1287         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1288         .ctrlmode_supported = CAN_CTRLMODE_FD |
1289                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1290                         CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1291         .clock = {
1292                 .freq = PCAN_UFD_CRYSTAL_HZ,
1293         },
1294         .bittiming_const = &pcan_usb_x6_const,
1295         .data_bittiming_const = &pcan_usb_x6_data_const,
1296
1297         /* size of device private data */
1298         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1299
1300         .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1301
1302         /* timestamps usage */
1303         .ts_used_bits = 32,
1304         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1305         .us_per_ts_shift = 0,
1306
1307         /* give here messages in/out endpoints */
1308         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1309         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1310
1311         /* size of rx/tx usb buffers */
1312         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1313         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1314
1315         /* device callbacks */
1316         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1317         .dev_init = pcan_usb_fd_init,
1318
1319         .dev_exit = pcan_usb_fd_exit,
1320         .dev_free = pcan_usb_fd_free,
1321         .dev_set_bus = pcan_usb_fd_set_bus,
1322         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1323         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1324         .dev_decode_buf = pcan_usb_fd_decode_buf,
1325         .dev_start = pcan_usb_fd_start,
1326         .dev_stop = pcan_usb_fd_stop,
1327         .dev_restart_async = pcan_usb_fd_restart_async,
1328         .dev_encode_msg = pcan_usb_fd_encode_msg,
1329
1330         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1331 };