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