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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter
   4  *
   5  * Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com>
   6  */
   7 #include <linux/netdevice.h>
   8 #include <linux/usb.h>
   9 #include <linux/module.h>
  10
  11 #include <linux/can.h>
  12 #include <linux/can/dev.h>
  13 #include <linux/can/error.h>
  14 #include <linux/can/dev/peak_canfd.h>
  15
  16 #include "pcan_usb_core.h"
  17 #include "pcan_usb_pro.h"
  18
  19 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB FD adapter");
  20 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro FD adapter");
  21
  22 #define PCAN_USBPROFD_CHANNEL_COUNT     2
  23 #define PCAN_USBFD_CHANNEL_COUNT        1
  24
  25 /* PCAN-USB Pro FD adapter internal clock (Hz) */
  26 #define PCAN_UFD_CRYSTAL_HZ             80000000
  27
  28 #define PCAN_UFD_CMD_BUFFER_SIZE        512
  29 #define PCAN_UFD_LOSPD_PKT_SIZE         64
  30
  31 /* PCAN-USB Pro FD command timeout (ms.) */
  32 #define PCAN_UFD_CMD_TIMEOUT_MS         1000
  33
  34 /* PCAN-USB Pro FD rx/tx buffers size */
  35 #define PCAN_UFD_RX_BUFFER_SIZE         2048
  36 #define PCAN_UFD_TX_BUFFER_SIZE         512
  37
  38 /* read some versions info from the hw device */
  39 struct __packed pcan_ufd_fw_info {
  40         __le16  size_of;        /* sizeof this */
  41         __le16  type;           /* type of this structure */
  42         u8      hw_type;        /* Type of hardware (HW_TYPE_xxx) */
  43         u8      bl_version[3];  /* Bootloader version */
  44         u8      hw_version;     /* Hardware version (PCB) */
  45         u8      fw_version[3];  /* Firmware version */
  46         __le32  dev_id[2];      /* "device id" per CAN */
  47         __le32  ser_no;         /* S/N */
  48         __le32  flags;          /* special functions */
  49 };
  50
  51 /* handle device specific info used by the netdevices */
  52 struct pcan_usb_fd_if {
  53         struct peak_usb_device  *dev[PCAN_USB_MAX_CHANNEL];
  54         struct pcan_ufd_fw_info fw_info;
  55         struct peak_time_ref    time_ref;
  56         int                     cm_ignore_count;
  57         int                     dev_opened_count;
  58 };
  59
  60 /* device information */
  61 struct pcan_usb_fd_device {
  62         struct peak_usb_device  dev;
  63         struct can_berr_counter bec;
  64         struct pcan_usb_fd_if   *usb_if;
  65         u8                      *cmd_buffer_addr;
  66 };
  67
  68 /* Extended USB commands (non uCAN commands) */
  69
  70 /* Clock Modes command */
  71 #define PCAN_UFD_CMD_CLK_SET            0x80
  72
  73 #define PCAN_UFD_CLK_80MHZ              0x0
  74 #define PCAN_UFD_CLK_60MHZ              0x1
  75 #define PCAN_UFD_CLK_40MHZ              0x2
  76 #define PCAN_UFD_CLK_30MHZ              0x3
  77 #define PCAN_UFD_CLK_24MHZ              0x4
  78 #define PCAN_UFD_CLK_20MHZ              0x5
  79 #define PCAN_UFD_CLK_DEF                PCAN_UFD_CLK_80MHZ
  80
  81 struct __packed pcan_ufd_clock {
  82         __le16  opcode_channel;
  83
  84         u8      mode;
  85         u8      unused[5];
  86 };
  87
  88 /* LED control command */
  89 #define PCAN_UFD_CMD_LED_SET            0x86
  90
  91 #define PCAN_UFD_LED_DEV                0x00
  92 #define PCAN_UFD_LED_FAST               0x01
  93 #define PCAN_UFD_LED_SLOW               0x02
  94 #define PCAN_UFD_LED_ON                 0x03
  95 #define PCAN_UFD_LED_OFF                0x04
  96 #define PCAN_UFD_LED_DEF                PCAN_UFD_LED_DEV
  97
  98 struct __packed pcan_ufd_led {
  99         __le16  opcode_channel;
 100
 101         u8      mode;
 102         u8      unused[5];
 103 };
 104
 105 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
 106 #define PCAN_UFD_FLTEXT_CALIBRATION     0x8000
 107
 108 struct __packed pcan_ufd_options {
 109         __le16  opcode_channel;
 110
 111         __le16  ucan_mask;
 112         u16     unused;
 113         __le16  usb_mask;
 114 };
 115
 116 /* Extended usage of uCAN messages for PCAN-USB Pro FD */
 117 #define PCAN_UFD_MSG_CALIBRATION        0x100
 118
 119 struct __packed pcan_ufd_ts_msg {
 120         __le16  size;
 121         __le16  type;
 122         __le32  ts_low;
 123         __le32  ts_high;
 124         __le16  usb_frame_index;
 125         u16     unused;
 126 };
 127
 128 #define PCAN_UFD_MSG_OVERRUN            0x101
 129
 130 #define PCAN_UFD_OVMSG_CHANNEL(o)       ((o)->channel & 0xf)
 131
 132 struct __packed pcan_ufd_ovr_msg {
 133         __le16  size;
 134         __le16  type;
 135         __le32  ts_low;
 136         __le32  ts_high;
 137         u8      channel;
 138         u8      unused[3];
 139 };
 140
 141 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
 142 {
 143         return om->channel & 0xf;
 144 }
 145
 146 /* Clock mode frequency values */
 147 static const u32 pcan_usb_fd_clk_freq[6] = {
 148         [PCAN_UFD_CLK_80MHZ] = 80000000,
 149         [PCAN_UFD_CLK_60MHZ] = 60000000,
 150         [PCAN_UFD_CLK_40MHZ] = 40000000,
 151         [PCAN_UFD_CLK_30MHZ] = 30000000,
 152         [PCAN_UFD_CLK_24MHZ] = 24000000,
 153         [PCAN_UFD_CLK_20MHZ] = 20000000
 154 };
 155
 156 /* return a device USB interface */
 157 static inline
 158 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev)
 159 {
 160         struct pcan_usb_fd_device *pdev =
 161                         container_of(dev, struct pcan_usb_fd_device, dev);
 162         return pdev->usb_if;
 163 }
 164
 165 /* return a device USB commands buffer */
 166 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
 167 {
 168         struct pcan_usb_fd_device *pdev =
 169                         container_of(dev, struct pcan_usb_fd_device, dev);
 170         return pdev->cmd_buffer_addr;
 171 }
 172
 173 /* send PCAN-USB Pro FD commands synchronously */
 174 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
 175 {
 176         void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
 177         int err = 0;
 178         u8 *packet_ptr;
 179         int packet_len;
 180         ptrdiff_t cmd_len;
 181
 182         /* usb device unregistered? */
 183         if (!(dev->state & PCAN_USB_STATE_CONNECTED))
 184                 return 0;
 185
 186         /* if a packet is not filled completely by commands, the command list
 187          * is terminated with an "end of collection" record.
 188          */
 189         cmd_len = cmd_tail - cmd_head;
 190         if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
 191                 memset(cmd_tail, 0xff, sizeof(u64));
 192                 cmd_len += sizeof(u64);
 193         }
 194
 195         packet_ptr = cmd_head;
 196         packet_len = cmd_len;
 197
 198         /* firmware is not able to re-assemble 512 bytes buffer in full-speed */
 199         if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
 200                 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
 201
 202         do {
 203                 err = usb_bulk_msg(dev->udev,
 204                                    usb_sndbulkpipe(dev->udev,
 205                                                    PCAN_USBPRO_EP_CMDOUT),
 206                                    packet_ptr, packet_len,
 207                                    NULL, PCAN_UFD_CMD_TIMEOUT_MS);
 208                 if (err) {
 209                         netdev_err(dev->netdev,
 210                                    "sending command failure: %d\n", err);
 211                         break;
 212                 }
 213
 214                 packet_ptr += packet_len;
 215                 cmd_len -= packet_len;
 216
 217                 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
 218                         packet_len = cmd_len;
 219
 220         } while (packet_len > 0);
 221
 222         return err;
 223 }
 224
 225 /* build the commands list in the given buffer, to enter operational mode */
 226 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
 227 {
 228         struct pucan_wr_err_cnt *prc;
 229         struct pucan_command *cmd;
 230         u8 *pc = buf;
 231
 232         /* 1st, reset error counters: */
 233         prc = (struct pucan_wr_err_cnt *)pc;
 234         prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 235                                                        PUCAN_CMD_WR_ERR_CNT);
 236
 237         /* select both counters */
 238         prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
 239
 240         /* and reset their values */
 241         prc->tx_counter = 0;
 242         prc->rx_counter = 0;
 243
 244         /* moves the pointer forward */
 245         pc += sizeof(struct pucan_wr_err_cnt);
 246
 247         /* add command to switch from ISO to non-ISO mode, if fw allows it */
 248         if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
 249                 struct pucan_options *puo = (struct pucan_options *)pc;
 250
 251                 puo->opcode_channel =
 252                         (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
 253                         pucan_cmd_opcode_channel(dev->ctrl_idx,
 254                                                  PUCAN_CMD_CLR_DIS_OPTION) :
 255                         pucan_cmd_opcode_channel(dev->ctrl_idx,
 256                                                  PUCAN_CMD_SET_EN_OPTION);
 257
 258                 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
 259
 260                 /* to be sure that no other extended bits will be taken into
 261                  * account
 262                  */
 263                 puo->unused = 0;
 264
 265                 /* moves the pointer forward */
 266                 pc += sizeof(struct pucan_options);
 267         }
 268
 269         /* next, go back to operational mode */
 270         cmd = (struct pucan_command *)pc;
 271         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 272                                 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
 273                                                 PUCAN_CMD_LISTEN_ONLY_MODE :
 274                                                 PUCAN_CMD_NORMAL_MODE);
 275         pc += sizeof(struct pucan_command);
 276
 277         return pc - buf;
 278 }
 279
 280 /* set CAN bus on/off */
 281 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
 282 {
 283         u8 *pc = pcan_usb_fd_cmd_buffer(dev);
 284         int l;
 285
 286         if (onoff) {
 287                 /* build the cmds list to enter operational mode */
 288                 l = pcan_usb_fd_build_restart_cmd(dev, pc);
 289         } else {
 290                 struct pucan_command *cmd = (struct pucan_command *)pc;
 291
 292                 /* build cmd to go back to reset mode */
 293                 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 294                                                         PUCAN_CMD_RESET_MODE);
 295                 l = sizeof(struct pucan_command);
 296         }
 297
 298         /* send the command */
 299         return pcan_usb_fd_send_cmd(dev, pc + l);
 300 }
 301
 302 /* set filtering masks:
 303  *
 304  *      idx  in range [0..63] selects a row #idx, all rows otherwise
 305  *      mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
 306  *
 307  *      Each bit of this 64 x 32 bits array defines a CANID value:
 308  *
 309  *      bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
 310  *      bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
 311  */
 312 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
 313                                       u32 mask)
 314 {
 315         struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
 316         int i, n;
 317
 318         /* select all rows when idx is out of range [0..63] */
 319         if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
 320                 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
 321                 idx = 0;
 322
 323         /* select the row (and only the row) otherwise */
 324         } else {
 325                 n = idx + 1;
 326         }
 327
 328         for (i = idx; i < n; i++, cmd++) {
 329                 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 330                                                         PUCAN_CMD_FILTER_STD);
 331                 cmd->idx = cpu_to_le16(i);
 332                 cmd->mask = cpu_to_le32(mask);
 333         }
 334
 335         /* send the command */
 336         return pcan_usb_fd_send_cmd(dev, cmd);
 337 }
 338
 339 /* set/unset options
 340  *
 341  *      onoff   set(1)/unset(0) options
 342  *      mask    each bit defines a kind of options to set/unset
 343  */
 344 static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
 345                                    bool onoff, u16 ucan_mask, u16 usb_mask)
 346 {
 347         struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
 348
 349         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 350                                         (onoff) ? PUCAN_CMD_SET_EN_OPTION :
 351                                                   PUCAN_CMD_CLR_DIS_OPTION);
 352
 353         cmd->ucan_mask = cpu_to_le16(ucan_mask);
 354         cmd->usb_mask = cpu_to_le16(usb_mask);
 355
 356         /* send the command */
 357         return pcan_usb_fd_send_cmd(dev, ++cmd);
 358 }
 359
 360 /* setup LED control */
 361 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
 362 {
 363         struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
 364
 365         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 366                                                        PCAN_UFD_CMD_LED_SET);
 367         cmd->mode = led_mode;
 368
 369         /* send the command */
 370         return pcan_usb_fd_send_cmd(dev, ++cmd);
 371 }
 372
 373 /* set CAN clock domain */
 374 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
 375                                         u8 clk_mode)
 376 {
 377         struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
 378
 379         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 380                                                        PCAN_UFD_CMD_CLK_SET);
 381         cmd->mode = clk_mode;
 382
 383         /* send the command */
 384         return pcan_usb_fd_send_cmd(dev, ++cmd);
 385 }
 386
 387 /* set bittiming for CAN and CAN-FD header */
 388 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
 389                                           struct can_bittiming *bt)
 390 {
 391         struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
 392
 393         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 394                                                        PUCAN_CMD_TIMING_SLOW);
 395         cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
 396                                 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
 397
 398         cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
 399         cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
 400         cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
 401
 402         cmd->ewl = 96;  /* default */
 403
 404         /* send the command */
 405         return pcan_usb_fd_send_cmd(dev, ++cmd);
 406 }
 407
 408 /* set CAN-FD bittiming for data */
 409 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
 410                                           struct can_bittiming *bt)
 411 {
 412         struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
 413
 414         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 415                                                        PUCAN_CMD_TIMING_FAST);
 416         cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
 417         cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
 418         cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
 419         cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
 420
 421         /* send the command */
 422         return pcan_usb_fd_send_cmd(dev, ++cmd);
 423 }
 424
 425 /* handle restart but in asynchronously way
 426  * (uses PCAN-USB Pro code to complete asynchronous request)
 427  */
 428 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
 429                                      struct urb *urb, u8 *buf)
 430 {
 431         u8 *pc = buf;
 432
 433         /* build the entire cmds list in the provided buffer, to go back into
 434          * operational mode.
 435          */
 436         pc += pcan_usb_fd_build_restart_cmd(dev, pc);
 437
 438         /* add EOC */
 439         memset(pc, 0xff, sizeof(struct pucan_command));
 440         pc += sizeof(struct pucan_command);
 441
 442         /* complete the URB */
 443         usb_fill_bulk_urb(urb, dev->udev,
 444                           usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
 445                           buf, pc - buf,
 446                           pcan_usb_pro_restart_complete, dev);
 447
 448         /* and submit it. */
 449         return usb_submit_urb(urb, GFP_ATOMIC);
 450 }
 451
 452 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
 453 {
 454         struct pcan_usb_fd_device *pdev =
 455                         container_of(dev, struct pcan_usb_fd_device, dev);
 456
 457         pdev->cmd_buffer_addr[0] = 0;
 458         pdev->cmd_buffer_addr[1] = !!loaded;
 459
 460         return pcan_usb_pro_send_req(dev,
 461                                 PCAN_USBPRO_REQ_FCT,
 462                                 PCAN_USBPRO_FCT_DRVLD,
 463                                 pdev->cmd_buffer_addr,
 464                                 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
 465 }
 466
 467 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
 468                                      struct pucan_msg *rx_msg)
 469 {
 470         struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
 471         struct peak_usb_device *dev;
 472         struct net_device *netdev;
 473         struct canfd_frame *cfd;
 474         struct sk_buff *skb;
 475         const u16 rx_msg_flags = le16_to_cpu(rm->flags);
 476
 477         if (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev))
 478                 return -ENOMEM;
 479
 480         dev = usb_if->dev[pucan_msg_get_channel(rm)];
 481         netdev = dev->netdev;
 482
 483         if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
 484                 /* CANFD frame case */
 485                 skb = alloc_canfd_skb(netdev, &cfd);
 486                 if (!skb)
 487                         return -ENOMEM;
 488
 489                 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
 490                         cfd->flags |= CANFD_BRS;
 491
 492                 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
 493                         cfd->flags |= CANFD_ESI;
 494
 495                 cfd->len = can_fd_dlc2len(pucan_msg_get_dlc(rm));
 496         } else {
 497                 /* CAN 2.0 frame case */
 498                 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
 499                 if (!skb)
 500                         return -ENOMEM;
 501
 502                 can_frame_set_cc_len((struct can_frame *)cfd,
 503                                      pucan_msg_get_dlc(rm),
 504                                      dev->can.ctrlmode);
 505         }
 506
 507         cfd->can_id = le32_to_cpu(rm->can_id);
 508
 509         if (rx_msg_flags & PUCAN_MSG_EXT_ID)
 510                 cfd->can_id |= CAN_EFF_FLAG;
 511
 512         if (rx_msg_flags & PUCAN_MSG_RTR)
 513                 cfd->can_id |= CAN_RTR_FLAG;
 514         else
 515                 memcpy(cfd->data, rm->d, cfd->len);
 516
 517         netdev->stats.rx_packets++;
 518         netdev->stats.rx_bytes += cfd->len;
 519
 520         peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low));
 521
 522         return 0;
 523 }
 524
 525 /* handle uCAN status message */
 526 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
 527                                      struct pucan_msg *rx_msg)
 528 {
 529         struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
 530         struct pcan_usb_fd_device *pdev;
 531         enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
 532         enum can_state rx_state, tx_state;
 533         struct peak_usb_device *dev;
 534         struct net_device *netdev;
 535         struct can_frame *cf;
 536         struct sk_buff *skb;
 537
 538         if (pucan_stmsg_get_channel(sm) >= ARRAY_SIZE(usb_if->dev))
 539                 return -ENOMEM;
 540
 541         dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
 542         pdev = container_of(dev, struct pcan_usb_fd_device, dev);
 543         netdev = dev->netdev;
 544
 545         /* nothing should be sent while in BUS_OFF state */
 546         if (dev->can.state == CAN_STATE_BUS_OFF)
 547                 return 0;
 548
 549         if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
 550                 new_state = CAN_STATE_BUS_OFF;
 551         } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
 552                 new_state = CAN_STATE_ERROR_PASSIVE;
 553         } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
 554                 new_state = CAN_STATE_ERROR_WARNING;
 555         } else {
 556                 /* no error bit (so, no error skb, back to active state) */
 557                 dev->can.state = CAN_STATE_ERROR_ACTIVE;
 558                 pdev->bec.txerr = 0;
 559                 pdev->bec.rxerr = 0;
 560                 return 0;
 561         }
 562
 563         /* state hasn't changed */
 564         if (new_state == dev->can.state)
 565                 return 0;
 566
 567         /* handle bus state change */
 568         tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
 569         rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
 570
 571         /* allocate an skb to store the error frame */
 572         skb = alloc_can_err_skb(netdev, &cf);
 573         if (skb)
 574                 can_change_state(netdev, cf, tx_state, rx_state);
 575
 576         /* things must be done even in case of OOM */
 577         if (new_state == CAN_STATE_BUS_OFF)
 578                 can_bus_off(netdev);
 579
 580         if (!skb)
 581                 return -ENOMEM;
 582
 583         netdev->stats.rx_packets++;
 584         netdev->stats.rx_bytes += cf->len;
 585
 586         peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low));
 587
 588         return 0;
 589 }
 590
 591 /* handle uCAN error message */
 592 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
 593                                     struct pucan_msg *rx_msg)
 594 {
 595         struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
 596         struct pcan_usb_fd_device *pdev;
 597         struct peak_usb_device *dev;
 598
 599         if (pucan_ermsg_get_channel(er) >= ARRAY_SIZE(usb_if->dev))
 600                 return -EINVAL;
 601
 602         dev = usb_if->dev[pucan_ermsg_get_channel(er)];
 603         pdev = container_of(dev, struct pcan_usb_fd_device, dev);
 604
 605         /* keep a trace of tx and rx error counters for later use */
 606         pdev->bec.txerr = er->tx_err_cnt;
 607         pdev->bec.rxerr = er->rx_err_cnt;
 608
 609         return 0;
 610 }
 611
 612 /* handle uCAN overrun message */
 613 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
 614                                       struct pucan_msg *rx_msg)
 615 {
 616         struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
 617         struct peak_usb_device *dev;
 618         struct net_device *netdev;
 619         struct can_frame *cf;
 620         struct sk_buff *skb;
 621
 622         if (pufd_omsg_get_channel(ov) >= ARRAY_SIZE(usb_if->dev))
 623                 return -EINVAL;
 624
 625         dev = usb_if->dev[pufd_omsg_get_channel(ov)];
 626         netdev = dev->netdev;
 627
 628         /* allocate an skb to store the error frame */
 629         skb = alloc_can_err_skb(netdev, &cf);
 630         if (!skb)
 631                 return -ENOMEM;
 632
 633         cf->can_id |= CAN_ERR_CRTL;
 634         cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
 635
 636         peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low));
 637
 638         netdev->stats.rx_over_errors++;
 639         netdev->stats.rx_errors++;
 640
 641         return 0;
 642 }
 643
 644 /* handle USB calibration message */
 645 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
 646                                   struct pucan_msg *rx_msg)
 647 {
 648         struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
 649
 650         /* should wait until clock is stabilized */
 651         if (usb_if->cm_ignore_count > 0)
 652                 usb_if->cm_ignore_count--;
 653         else
 654                 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
 655 }
 656
 657 /* callback for bulk IN urb */
 658 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
 659 {
 660         struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
 661         struct net_device *netdev = dev->netdev;
 662         struct pucan_msg *rx_msg;
 663         u8 *msg_ptr, *msg_end;
 664         int err = 0;
 665
 666         /* loop reading all the records from the incoming message */
 667         msg_ptr = urb->transfer_buffer;
 668         msg_end = urb->transfer_buffer + urb->actual_length;
 669         for (; msg_ptr < msg_end;) {
 670                 u16 rx_msg_type, rx_msg_size;
 671
 672                 rx_msg = (struct pucan_msg *)msg_ptr;
 673                 if (!rx_msg->size) {
 674                         /* null packet found: end of list */
 675                         break;
 676                 }
 677
 678                 rx_msg_size = le16_to_cpu(rx_msg->size);
 679                 rx_msg_type = le16_to_cpu(rx_msg->type);
 680
 681                 /* check if the record goes out of current packet */
 682                 if (msg_ptr + rx_msg_size > msg_end) {
 683                         netdev_err(netdev,
 684                                    "got frag rec: should inc usb rx buf sze\n");
 685                         err = -EBADMSG;
 686                         break;
 687                 }
 688
 689                 switch (rx_msg_type) {
 690                 case PUCAN_MSG_CAN_RX:
 691                         err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
 692                         if (err < 0)
 693                                 goto fail;
 694                         break;
 695
 696                 case PCAN_UFD_MSG_CALIBRATION:
 697                         pcan_usb_fd_decode_ts(usb_if, rx_msg);
 698                         break;
 699
 700                 case PUCAN_MSG_ERROR:
 701                         err = pcan_usb_fd_decode_error(usb_if, rx_msg);
 702                         if (err < 0)
 703                                 goto fail;
 704                         break;
 705
 706                 case PUCAN_MSG_STATUS:
 707                         err = pcan_usb_fd_decode_status(usb_if, rx_msg);
 708                         if (err < 0)
 709                                 goto fail;
 710                         break;
 711
 712                 case PCAN_UFD_MSG_OVERRUN:
 713                         err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
 714                         if (err < 0)
 715                                 goto fail;
 716                         break;
 717
 718                 default:
 719                         netdev_err(netdev,
 720                                    "unhandled msg type 0x%02x (%d): ignored\n",
 721                                    rx_msg_type, rx_msg_type);
 722                         break;
 723                 }
 724
 725                 msg_ptr += rx_msg_size;
 726         }
 727
 728 fail:
 729         if (err)
 730                 pcan_dump_mem("received msg",
 731                               urb->transfer_buffer, urb->actual_length);
 732         return err;
 733 }
 734
 735 /* CAN/CANFD frames encoding callback */
 736 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
 737                                   struct sk_buff *skb, u8 *obuf, size_t *size)
 738 {
 739         struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
 740         struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
 741         u16 tx_msg_size, tx_msg_flags;
 742         u8 dlc;
 743
 744         if (cfd->len > CANFD_MAX_DLEN)
 745                 return -EINVAL;
 746
 747         tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
 748         tx_msg->size = cpu_to_le16(tx_msg_size);
 749         tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
 750
 751         tx_msg_flags = 0;
 752         if (cfd->can_id & CAN_EFF_FLAG) {
 753                 tx_msg_flags |= PUCAN_MSG_EXT_ID;
 754                 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
 755         } else {
 756                 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
 757         }
 758
 759         if (can_is_canfd_skb(skb)) {
 760                 /* considering a CANFD frame */
 761                 dlc = can_fd_len2dlc(cfd->len);
 762
 763                 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
 764
 765                 if (cfd->flags & CANFD_BRS)
 766                         tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
 767
 768                 if (cfd->flags & CANFD_ESI)
 769                         tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
 770         } else {
 771                 /* CAND 2.0 frames */
 772                 dlc = can_get_cc_dlc((struct can_frame *)cfd,
 773                                      dev->can.ctrlmode);
 774
 775                 if (cfd->can_id & CAN_RTR_FLAG)
 776                         tx_msg_flags |= PUCAN_MSG_RTR;
 777         }
 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 /* describes the PCAN-USB FD adapter */
1013 static const struct can_bittiming_const pcan_usb_fd_const = {
1014         .name = "pcan_usb_fd",
1015         .tseg1_min = 1,
1016         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1017         .tseg2_min = 1,
1018         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1019         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1020         .brp_min = 1,
1021         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1022         .brp_inc = 1,
1023 };
1024
1025 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1026         .name = "pcan_usb_fd",
1027         .tseg1_min = 1,
1028         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1029         .tseg2_min = 1,
1030         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1031         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1032         .brp_min = 1,
1033         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1034         .brp_inc = 1,
1035 };
1036
1037 const struct peak_usb_adapter pcan_usb_fd = {
1038         .name = "PCAN-USB FD",
1039         .device_id = PCAN_USBFD_PRODUCT_ID,
1040         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1041         .ctrlmode_supported = CAN_CTRLMODE_FD |
1042                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1043                         CAN_CTRLMODE_CC_LEN8_DLC,
1044         .clock = {
1045                 .freq = PCAN_UFD_CRYSTAL_HZ,
1046         },
1047         .bittiming_const = &pcan_usb_fd_const,
1048         .data_bittiming_const = &pcan_usb_fd_data_const,
1049
1050         /* size of device private data */
1051         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1052
1053         /* timestamps usage */
1054         .ts_used_bits = 32,
1055         .ts_period = 1000000, /* calibration period in ts. */
1056         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1057         .us_per_ts_shift = 0,
1058
1059         /* give here messages in/out endpoints */
1060         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1061         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1062
1063         /* size of rx/tx usb buffers */
1064         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1065         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1066
1067         /* device callbacks */
1068         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1069         .dev_init = pcan_usb_fd_init,
1070
1071         .dev_exit = pcan_usb_fd_exit,
1072         .dev_free = pcan_usb_fd_free,
1073         .dev_set_bus = pcan_usb_fd_set_bus,
1074         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1075         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1076         .dev_decode_buf = pcan_usb_fd_decode_buf,
1077         .dev_start = pcan_usb_fd_start,
1078         .dev_stop = pcan_usb_fd_stop,
1079         .dev_restart_async = pcan_usb_fd_restart_async,
1080         .dev_encode_msg = pcan_usb_fd_encode_msg,
1081
1082         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1083 };
1084
1085 /* describes the PCAN-CHIP USB */
1086 static const struct can_bittiming_const pcan_usb_chip_const = {
1087         .name = "pcan_chip_usb",
1088         .tseg1_min = 1,
1089         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1090         .tseg2_min = 1,
1091         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1092         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1093         .brp_min = 1,
1094         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1095         .brp_inc = 1,
1096 };
1097
1098 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1099         .name = "pcan_chip_usb",
1100         .tseg1_min = 1,
1101         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1102         .tseg2_min = 1,
1103         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1104         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1105         .brp_min = 1,
1106         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1107         .brp_inc = 1,
1108 };
1109
1110 const struct peak_usb_adapter pcan_usb_chip = {
1111         .name = "PCAN-Chip USB",
1112         .device_id = PCAN_USBCHIP_PRODUCT_ID,
1113         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1114         .ctrlmode_supported = CAN_CTRLMODE_FD |
1115                 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1116                 CAN_CTRLMODE_CC_LEN8_DLC,
1117         .clock = {
1118                 .freq = PCAN_UFD_CRYSTAL_HZ,
1119         },
1120         .bittiming_const = &pcan_usb_chip_const,
1121         .data_bittiming_const = &pcan_usb_chip_data_const,
1122
1123         /* size of device private data */
1124         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1125
1126         /* timestamps usage */
1127         .ts_used_bits = 32,
1128         .ts_period = 1000000, /* calibration period in ts. */
1129         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1130         .us_per_ts_shift = 0,
1131
1132         /* give here messages in/out endpoints */
1133         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1134         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1135
1136         /* size of rx/tx usb buffers */
1137         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1138         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1139
1140         /* device callbacks */
1141         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1142         .dev_init = pcan_usb_fd_init,
1143
1144         .dev_exit = pcan_usb_fd_exit,
1145         .dev_free = pcan_usb_fd_free,
1146         .dev_set_bus = pcan_usb_fd_set_bus,
1147         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1148         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1149         .dev_decode_buf = pcan_usb_fd_decode_buf,
1150         .dev_start = pcan_usb_fd_start,
1151         .dev_stop = pcan_usb_fd_stop,
1152         .dev_restart_async = pcan_usb_fd_restart_async,
1153         .dev_encode_msg = pcan_usb_fd_encode_msg,
1154
1155         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1156 };
1157
1158 /* describes the PCAN-USB Pro FD adapter */
1159 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1160         .name = "pcan_usb_pro_fd",
1161         .tseg1_min = 1,
1162         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1163         .tseg2_min = 1,
1164         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1165         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1166         .brp_min = 1,
1167         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1168         .brp_inc = 1,
1169 };
1170
1171 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1172         .name = "pcan_usb_pro_fd",
1173         .tseg1_min = 1,
1174         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1175         .tseg2_min = 1,
1176         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1177         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1178         .brp_min = 1,
1179         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1180         .brp_inc = 1,
1181 };
1182
1183 const struct peak_usb_adapter pcan_usb_pro_fd = {
1184         .name = "PCAN-USB Pro FD",
1185         .device_id = PCAN_USBPROFD_PRODUCT_ID,
1186         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1187         .ctrlmode_supported = CAN_CTRLMODE_FD |
1188                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1189                         CAN_CTRLMODE_CC_LEN8_DLC,
1190         .clock = {
1191                 .freq = PCAN_UFD_CRYSTAL_HZ,
1192         },
1193         .bittiming_const = &pcan_usb_pro_fd_const,
1194         .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1195
1196         /* size of device private data */
1197         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1198
1199         /* timestamps usage */
1200         .ts_used_bits = 32,
1201         .ts_period = 1000000, /* calibration period in ts. */
1202         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1203         .us_per_ts_shift = 0,
1204
1205         /* give here messages in/out endpoints */
1206         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1207         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1208
1209         /* size of rx/tx usb buffers */
1210         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1211         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1212
1213         /* device callbacks */
1214         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1215         .dev_init = pcan_usb_fd_init,
1216
1217         .dev_exit = pcan_usb_fd_exit,
1218         .dev_free = pcan_usb_fd_free,
1219         .dev_set_bus = pcan_usb_fd_set_bus,
1220         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1221         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1222         .dev_decode_buf = pcan_usb_fd_decode_buf,
1223         .dev_start = pcan_usb_fd_start,
1224         .dev_stop = pcan_usb_fd_stop,
1225         .dev_restart_async = pcan_usb_fd_restart_async,
1226         .dev_encode_msg = pcan_usb_fd_encode_msg,
1227
1228         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1229 };
1230
1231 /* describes the PCAN-USB X6 adapter */
1232 static const struct can_bittiming_const pcan_usb_x6_const = {
1233         .name = "pcan_usb_x6",
1234         .tseg1_min = 1,
1235         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1236         .tseg2_min = 1,
1237         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1238         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1239         .brp_min = 1,
1240         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1241         .brp_inc = 1,
1242 };
1243
1244 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1245         .name = "pcan_usb_x6",
1246         .tseg1_min = 1,
1247         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1248         .tseg2_min = 1,
1249         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1250         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1251         .brp_min = 1,
1252         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1253         .brp_inc = 1,
1254 };
1255
1256 const struct peak_usb_adapter pcan_usb_x6 = {
1257         .name = "PCAN-USB X6",
1258         .device_id = PCAN_USBX6_PRODUCT_ID,
1259         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1260         .ctrlmode_supported = CAN_CTRLMODE_FD |
1261                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1262                         CAN_CTRLMODE_CC_LEN8_DLC,
1263         .clock = {
1264                 .freq = PCAN_UFD_CRYSTAL_HZ,
1265         },
1266         .bittiming_const = &pcan_usb_x6_const,
1267         .data_bittiming_const = &pcan_usb_x6_data_const,
1268
1269         /* size of device private data */
1270         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1271
1272         /* timestamps usage */
1273         .ts_used_bits = 32,
1274         .ts_period = 1000000, /* calibration period in ts. */
1275         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1276         .us_per_ts_shift = 0,
1277
1278         /* give here messages in/out endpoints */
1279         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1280         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1281
1282         /* size of rx/tx usb buffers */
1283         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1284         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1285
1286         /* device callbacks */
1287         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1288         .dev_init = pcan_usb_fd_init,
1289
1290         .dev_exit = pcan_usb_fd_exit,
1291         .dev_free = pcan_usb_fd_free,
1292         .dev_set_bus = pcan_usb_fd_set_bus,
1293         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1294         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1295         .dev_decode_buf = pcan_usb_fd_decode_buf,
1296         .dev_start = pcan_usb_fd_start,
1297         .dev_stop = pcan_usb_fd_stop,
1298         .dev_restart_async = pcan_usb_fd_restart_async,
1299         .dev_encode_msg = pcan_usb_fd_encode_msg,
1300
1301         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1302 };