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

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