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                 /* 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         netdev->stats.rx_packets++;
 582         netdev->stats.rx_bytes += cf->len;
 583
 584         peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low));
 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 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                 dlc = can_fd_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                 dlc = can_get_cc_dlc((struct can_frame *)cfd,
 771                                      dev->can.ctrlmode);
 772
 773                 if (cfd->can_id & CAN_RTR_FLAG)
 774                         tx_msg_flags |= PUCAN_MSG_RTR;
 775         }
 776
 777         /* Single-Shot frame */
 778         if (dev->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
 779                 tx_msg_flags |= PUCAN_MSG_SINGLE_SHOT;
 780
 781         tx_msg->flags = cpu_to_le16(tx_msg_flags);
 782         tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, dlc);
 783         memcpy(tx_msg->d, cfd->data, cfd->len);
 784
 785         /* add null size message to tag the end (messages are 32-bits aligned)
 786          */
 787         tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
 788
 789         tx_msg->size = 0;
 790
 791         /* set the whole size of the USB packet to send */
 792         *size = tx_msg_size + sizeof(u32);
 793
 794         return 0;
 795 }
 796
 797 /* start the interface (last chance before set bus on) */
 798 static int pcan_usb_fd_start(struct peak_usb_device *dev)
 799 {
 800         struct pcan_usb_fd_device *pdev =
 801                         container_of(dev, struct pcan_usb_fd_device, dev);
 802         int err;
 803
 804         /* set filter mode: all acceptance */
 805         err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
 806         if (err)
 807                 return err;
 808
 809         /* opening first device: */
 810         if (pdev->usb_if->dev_opened_count == 0) {
 811                 /* reset time_ref */
 812                 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
 813                                        &pcan_usb_pro_fd);
 814
 815                 /* enable USB calibration messages */
 816                 err = pcan_usb_fd_set_options(dev, 1,
 817                                               PUCAN_OPTION_ERROR,
 818                                               PCAN_UFD_FLTEXT_CALIBRATION);
 819         }
 820
 821         pdev->usb_if->dev_opened_count++;
 822
 823         /* reset cached error counters */
 824         pdev->bec.txerr = 0;
 825         pdev->bec.rxerr = 0;
 826
 827         return err;
 828 }
 829
 830 /* socket callback used to copy berr counters values received through USB */
 831 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
 832                                         struct can_berr_counter *bec)
 833 {
 834         struct peak_usb_device *dev = netdev_priv(netdev);
 835         struct pcan_usb_fd_device *pdev =
 836                         container_of(dev, struct pcan_usb_fd_device, dev);
 837
 838         *bec = pdev->bec;
 839
 840         /* must return 0 */
 841         return 0;
 842 }
 843
 844 /* stop interface (last chance before set bus off) */
 845 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
 846 {
 847         struct pcan_usb_fd_device *pdev =
 848                         container_of(dev, struct pcan_usb_fd_device, dev);
 849
 850         /* turn off special msgs for that interface if no other dev opened */
 851         if (pdev->usb_if->dev_opened_count == 1)
 852                 pcan_usb_fd_set_options(dev, 0,
 853                                         PUCAN_OPTION_ERROR,
 854                                         PCAN_UFD_FLTEXT_CALIBRATION);
 855         pdev->usb_if->dev_opened_count--;
 856
 857         return 0;
 858 }
 859
 860 /* called when probing, to initialize a device object */
 861 static int pcan_usb_fd_init(struct peak_usb_device *dev)
 862 {
 863         struct pcan_usb_fd_device *pdev =
 864                         container_of(dev, struct pcan_usb_fd_device, dev);
 865         int i, err = -ENOMEM;
 866
 867         /* do this for 1st channel only */
 868         if (!dev->prev_siblings) {
 869                 /* allocate netdevices common structure attached to first one */
 870                 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
 871                 if (!pdev->usb_if)
 872                         goto err_out;
 873
 874                 /* allocate command buffer once for all for the interface */
 875                 pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
 876                                                 GFP_KERNEL);
 877                 if (!pdev->cmd_buffer_addr)
 878                         goto err_out_1;
 879
 880                 /* number of ts msgs to ignore before taking one into account */
 881                 pdev->usb_if->cm_ignore_count = 5;
 882
 883                 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
 884                                             PCAN_USBPRO_INFO_FW,
 885                                             &pdev->usb_if->fw_info,
 886                                             sizeof(pdev->usb_if->fw_info));
 887                 if (err) {
 888                         dev_err(dev->netdev->dev.parent,
 889                                 "unable to read %s firmware info (err %d)\n",
 890                                 dev->adapter->name, err);
 891                         goto err_out_2;
 892                 }
 893
 894                 /* explicit use of dev_xxx() instead of netdev_xxx() here:
 895                  * information displayed are related to the device itself, not
 896                  * to the canx (channel) device.
 897                  */
 898                 dev_info(dev->netdev->dev.parent,
 899                          "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
 900                          dev->adapter->name, pdev->usb_if->fw_info.hw_version,
 901                          pdev->usb_if->fw_info.fw_version[0],
 902                          pdev->usb_if->fw_info.fw_version[1],
 903                          pdev->usb_if->fw_info.fw_version[2],
 904                          dev->adapter->ctrl_count);
 905
 906                 /* check for ability to switch between ISO/non-ISO modes */
 907                 if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
 908                         /* firmware >= 2.x supports ISO/non-ISO switching */
 909                         dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
 910                 } else {
 911                         /* firmware < 2.x only supports fixed(!) non-ISO */
 912                         dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
 913                 }
 914
 915                 /* tell the hardware the can driver is running */
 916                 err = pcan_usb_fd_drv_loaded(dev, 1);
 917                 if (err) {
 918                         dev_err(dev->netdev->dev.parent,
 919                                 "unable to tell %s driver is loaded (err %d)\n",
 920                                 dev->adapter->name, err);
 921                         goto err_out_2;
 922                 }
 923         } else {
 924                 /* otherwise, simply copy previous sibling's values */
 925                 struct pcan_usb_fd_device *ppdev =
 926                         container_of(dev->prev_siblings,
 927                                      struct pcan_usb_fd_device, dev);
 928
 929                 pdev->usb_if = ppdev->usb_if;
 930                 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
 931
 932                 /* do a copy of the ctrlmode[_supported] too */
 933                 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
 934                 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
 935         }
 936
 937         pdev->usb_if->dev[dev->ctrl_idx] = dev;
 938         dev->device_number =
 939                 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
 940
 941         /* set clock domain */
 942         for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
 943                 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
 944                         break;
 945
 946         if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
 947                 dev_warn(dev->netdev->dev.parent,
 948                          "incompatible clock frequencies\n");
 949                 err = -EINVAL;
 950                 goto err_out_2;
 951         }
 952
 953         pcan_usb_fd_set_clock_domain(dev, i);
 954
 955         /* set LED in default state (end of init phase) */
 956         pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
 957
 958         return 0;
 959
 960 err_out_2:
 961         kfree(pdev->cmd_buffer_addr);
 962 err_out_1:
 963         kfree(pdev->usb_if);
 964 err_out:
 965         return err;
 966 }
 967
 968 /* called when driver module is being unloaded */
 969 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
 970 {
 971         struct pcan_usb_fd_device *pdev =
 972                         container_of(dev, struct pcan_usb_fd_device, dev);
 973
 974         /* when rmmod called before unplug and if down, should reset things
 975          * before leaving
 976          */
 977         if (dev->can.state != CAN_STATE_STOPPED) {
 978                 /* set bus off on the corresponding channel */
 979                 pcan_usb_fd_set_bus(dev, 0);
 980         }
 981
 982         /* switch off corresponding CAN LEDs */
 983         pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
 984
 985         /* if channel #0 (only) */
 986         if (dev->ctrl_idx == 0) {
 987                 /* turn off calibration message if any device were opened */
 988                 if (pdev->usb_if->dev_opened_count > 0)
 989                         pcan_usb_fd_set_options(dev, 0,
 990                                                 PUCAN_OPTION_ERROR,
 991                                                 PCAN_UFD_FLTEXT_CALIBRATION);
 992
 993                 /* tell USB adapter that the driver is being unloaded */
 994                 pcan_usb_fd_drv_loaded(dev, 0);
 995         }
 996 }
 997
 998 /* called when the USB adapter is unplugged */
 999 static void pcan_usb_fd_free(struct peak_usb_device *dev)
1000 {
1001         /* last device: can free shared objects now */
1002         if (!dev->prev_siblings && !dev->next_siblings) {
1003                 struct pcan_usb_fd_device *pdev =
1004                         container_of(dev, struct pcan_usb_fd_device, dev);
1005
1006                 /* free commands buffer */
1007                 kfree(pdev->cmd_buffer_addr);
1008
1009                 /* free usb interface object */
1010                 kfree(pdev->usb_if);
1011         }
1012 }
1013
1014 /* blink LED's */
1015 static int pcan_usb_fd_set_phys_id(struct net_device *netdev,
1016                                    enum ethtool_phys_id_state state)
1017 {
1018         struct peak_usb_device *dev = netdev_priv(netdev);
1019         int err = 0;
1020
1021         switch (state) {
1022         case ETHTOOL_ID_ACTIVE:
1023                 err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_FAST);
1024                 break;
1025         case ETHTOOL_ID_INACTIVE:
1026                 err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
1027                 break;
1028         default:
1029                 break;
1030         }
1031
1032         return err;
1033 }
1034
1035 static const struct ethtool_ops pcan_usb_fd_ethtool_ops = {
1036         .set_phys_id = pcan_usb_fd_set_phys_id,
1037 };
1038
1039 /* describes the PCAN-USB FD adapter */
1040 static const struct can_bittiming_const pcan_usb_fd_const = {
1041         .name = "pcan_usb_fd",
1042         .tseg1_min = 1,
1043         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1044         .tseg2_min = 1,
1045         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1046         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1047         .brp_min = 1,
1048         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1049         .brp_inc = 1,
1050 };
1051
1052 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1053         .name = "pcan_usb_fd",
1054         .tseg1_min = 1,
1055         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1056         .tseg2_min = 1,
1057         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1058         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1059         .brp_min = 1,
1060         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1061         .brp_inc = 1,
1062 };
1063
1064 const struct peak_usb_adapter pcan_usb_fd = {
1065         .name = "PCAN-USB FD",
1066         .device_id = PCAN_USBFD_PRODUCT_ID,
1067         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1068         .ctrlmode_supported = CAN_CTRLMODE_FD |
1069                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1070                         CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1071         .clock = {
1072                 .freq = PCAN_UFD_CRYSTAL_HZ,
1073         },
1074         .bittiming_const = &pcan_usb_fd_const,
1075         .data_bittiming_const = &pcan_usb_fd_data_const,
1076
1077         /* size of device private data */
1078         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1079
1080         .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1081
1082         /* timestamps usage */
1083         .ts_used_bits = 32,
1084         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1085         .us_per_ts_shift = 0,
1086
1087         /* give here messages in/out endpoints */
1088         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1089         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1090
1091         /* size of rx/tx usb buffers */
1092         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1093         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1094
1095         /* device callbacks */
1096         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1097         .dev_init = pcan_usb_fd_init,
1098
1099         .dev_exit = pcan_usb_fd_exit,
1100         .dev_free = pcan_usb_fd_free,
1101         .dev_set_bus = pcan_usb_fd_set_bus,
1102         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1103         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1104         .dev_decode_buf = pcan_usb_fd_decode_buf,
1105         .dev_start = pcan_usb_fd_start,
1106         .dev_stop = pcan_usb_fd_stop,
1107         .dev_restart_async = pcan_usb_fd_restart_async,
1108         .dev_encode_msg = pcan_usb_fd_encode_msg,
1109
1110         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1111 };
1112
1113 /* describes the PCAN-CHIP USB */
1114 static const struct can_bittiming_const pcan_usb_chip_const = {
1115         .name = "pcan_chip_usb",
1116         .tseg1_min = 1,
1117         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1118         .tseg2_min = 1,
1119         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1120         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1121         .brp_min = 1,
1122         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1123         .brp_inc = 1,
1124 };
1125
1126 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1127         .name = "pcan_chip_usb",
1128         .tseg1_min = 1,
1129         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1130         .tseg2_min = 1,
1131         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1132         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1133         .brp_min = 1,
1134         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1135         .brp_inc = 1,
1136 };
1137
1138 const struct peak_usb_adapter pcan_usb_chip = {
1139         .name = "PCAN-Chip USB",
1140         .device_id = PCAN_USBCHIP_PRODUCT_ID,
1141         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1142         .ctrlmode_supported = CAN_CTRLMODE_FD |
1143                 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1144                 CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1145         .clock = {
1146                 .freq = PCAN_UFD_CRYSTAL_HZ,
1147         },
1148         .bittiming_const = &pcan_usb_chip_const,
1149         .data_bittiming_const = &pcan_usb_chip_data_const,
1150
1151         /* size of device private data */
1152         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1153
1154         .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1155
1156         /* timestamps usage */
1157         .ts_used_bits = 32,
1158         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1159         .us_per_ts_shift = 0,
1160
1161         /* give here messages in/out endpoints */
1162         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1163         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1164
1165         /* size of rx/tx usb buffers */
1166         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1167         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1168
1169         /* device callbacks */
1170         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1171         .dev_init = pcan_usb_fd_init,
1172
1173         .dev_exit = pcan_usb_fd_exit,
1174         .dev_free = pcan_usb_fd_free,
1175         .dev_set_bus = pcan_usb_fd_set_bus,
1176         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1177         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1178         .dev_decode_buf = pcan_usb_fd_decode_buf,
1179         .dev_start = pcan_usb_fd_start,
1180         .dev_stop = pcan_usb_fd_stop,
1181         .dev_restart_async = pcan_usb_fd_restart_async,
1182         .dev_encode_msg = pcan_usb_fd_encode_msg,
1183
1184         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1185 };
1186
1187 /* describes the PCAN-USB Pro FD adapter */
1188 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1189         .name = "pcan_usb_pro_fd",
1190         .tseg1_min = 1,
1191         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1192         .tseg2_min = 1,
1193         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1194         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1195         .brp_min = 1,
1196         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1197         .brp_inc = 1,
1198 };
1199
1200 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1201         .name = "pcan_usb_pro_fd",
1202         .tseg1_min = 1,
1203         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1204         .tseg2_min = 1,
1205         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1206         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1207         .brp_min = 1,
1208         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1209         .brp_inc = 1,
1210 };
1211
1212 const struct peak_usb_adapter pcan_usb_pro_fd = {
1213         .name = "PCAN-USB Pro FD",
1214         .device_id = PCAN_USBPROFD_PRODUCT_ID,
1215         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1216         .ctrlmode_supported = CAN_CTRLMODE_FD |
1217                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1218                         CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1219         .clock = {
1220                 .freq = PCAN_UFD_CRYSTAL_HZ,
1221         },
1222         .bittiming_const = &pcan_usb_pro_fd_const,
1223         .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1224
1225         /* size of device private data */
1226         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1227
1228         .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1229
1230         /* timestamps usage */
1231         .ts_used_bits = 32,
1232         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1233         .us_per_ts_shift = 0,
1234
1235         /* give here messages in/out endpoints */
1236         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1237         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1238
1239         /* size of rx/tx usb buffers */
1240         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1241         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1242
1243         /* device callbacks */
1244         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1245         .dev_init = pcan_usb_fd_init,
1246
1247         .dev_exit = pcan_usb_fd_exit,
1248         .dev_free = pcan_usb_fd_free,
1249         .dev_set_bus = pcan_usb_fd_set_bus,
1250         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1251         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1252         .dev_decode_buf = pcan_usb_fd_decode_buf,
1253         .dev_start = pcan_usb_fd_start,
1254         .dev_stop = pcan_usb_fd_stop,
1255         .dev_restart_async = pcan_usb_fd_restart_async,
1256         .dev_encode_msg = pcan_usb_fd_encode_msg,
1257
1258         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1259 };
1260
1261 /* describes the PCAN-USB X6 adapter */
1262 static const struct can_bittiming_const pcan_usb_x6_const = {
1263         .name = "pcan_usb_x6",
1264         .tseg1_min = 1,
1265         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1266         .tseg2_min = 1,
1267         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1268         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1269         .brp_min = 1,
1270         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1271         .brp_inc = 1,
1272 };
1273
1274 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1275         .name = "pcan_usb_x6",
1276         .tseg1_min = 1,
1277         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1278         .tseg2_min = 1,
1279         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1280         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1281         .brp_min = 1,
1282         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1283         .brp_inc = 1,
1284 };
1285
1286 const struct peak_usb_adapter pcan_usb_x6 = {
1287         .name = "PCAN-USB X6",
1288         .device_id = PCAN_USBX6_PRODUCT_ID,
1289         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1290         .ctrlmode_supported = CAN_CTRLMODE_FD |
1291                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1292                         CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1293         .clock = {
1294                 .freq = PCAN_UFD_CRYSTAL_HZ,
1295         },
1296         .bittiming_const = &pcan_usb_x6_const,
1297         .data_bittiming_const = &pcan_usb_x6_data_const,
1298
1299         /* size of device private data */
1300         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1301
1302         .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1303
1304         /* timestamps usage */
1305         .ts_used_bits = 32,
1306         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1307         .us_per_ts_shift = 0,
1308
1309         /* give here messages in/out endpoints */
1310         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1311         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1312
1313         /* size of rx/tx usb buffers */
1314         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1315         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1316
1317         /* device callbacks */
1318         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1319         .dev_init = pcan_usb_fd_init,
1320
1321         .dev_exit = pcan_usb_fd_exit,
1322         .dev_free = pcan_usb_fd_free,
1323         .dev_set_bus = pcan_usb_fd_set_bus,
1324         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1325         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1326         .dev_decode_buf = pcan_usb_fd_decode_buf,
1327         .dev_start = pcan_usb_fd_start,
1328         .dev_stop = pcan_usb_fd_stop,
1329         .dev_restart_async = pcan_usb_fd_restart_async,
1330         .dev_encode_msg = pcan_usb_fd_encode_msg,
1331
1332         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1333 };