1 // SPDX-License-Identifier: GPL-2.0 2 /* Parts of this driver are based on the following: 3 * - Kvaser linux mhydra driver (version 5.24) 4 * - CAN driver for esd CAN-USB/2 5 * 6 * Copyright (C) 2018 KVASER AB, Sweden. All rights reserved. 7 * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh 8 * 9 * Known issues: 10 * - Transition from CAN_STATE_ERROR_WARNING to CAN_STATE_ERROR_ACTIVE is only 11 * reported after a call to do_get_berr_counter(), since firmware does not 12 * distinguish between ERROR_WARNING and ERROR_ACTIVE. 13 * - Hardware timestamps are not set for CAN Tx frames. 14 */ 15 16 #include <linux/completion.h> 17 #include <linux/device.h> 18 #include <linux/gfp.h> 19 #include <linux/jiffies.h> 20 #include <linux/kernel.h> 21 #include <linux/netdevice.h> 22 #include <linux/spinlock.h> 23 #include <linux/string.h> 24 #include <linux/types.h> 25 #include <linux/units.h> 26 #include <linux/usb.h> 27 28 #include <linux/can.h> 29 #include <linux/can/dev.h> 30 #include <linux/can/error.h> 31 #include <linux/can/netlink.h> 32 33 #include "kvaser_usb.h" 34 35 /* Forward declarations */ 36 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_kcan; 37 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_flexc; 38 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_rt; 39 40 #define KVASER_USB_HYDRA_BULK_EP_IN_ADDR 0x82 41 #define KVASER_USB_HYDRA_BULK_EP_OUT_ADDR 0x02 42 43 #define KVASER_USB_HYDRA_MAX_TRANSID 0xff 44 #define KVASER_USB_HYDRA_MIN_TRANSID 0x01 45 46 /* Minihydra command IDs */ 47 #define CMD_SET_BUSPARAMS_REQ 16 48 #define CMD_GET_CHIP_STATE_REQ 19 49 #define CMD_CHIP_STATE_EVENT 20 50 #define CMD_SET_DRIVERMODE_REQ 21 51 #define CMD_START_CHIP_REQ 26 52 #define CMD_START_CHIP_RESP 27 53 #define CMD_STOP_CHIP_REQ 28 54 #define CMD_STOP_CHIP_RESP 29 55 #define CMD_TX_CAN_MESSAGE 33 56 #define CMD_GET_CARD_INFO_REQ 34 57 #define CMD_GET_CARD_INFO_RESP 35 58 #define CMD_GET_SOFTWARE_INFO_REQ 38 59 #define CMD_GET_SOFTWARE_INFO_RESP 39 60 #define CMD_ERROR_EVENT 45 61 #define CMD_FLUSH_QUEUE 48 62 #define CMD_TX_ACKNOWLEDGE 50 63 #define CMD_FLUSH_QUEUE_RESP 66 64 #define CMD_SET_BUSPARAMS_FD_REQ 69 65 #define CMD_SET_BUSPARAMS_FD_RESP 70 66 #define CMD_SET_BUSPARAMS_RESP 85 67 #define CMD_GET_CAPABILITIES_REQ 95 68 #define CMD_GET_CAPABILITIES_RESP 96 69 #define CMD_RX_MESSAGE 106 70 #define CMD_MAP_CHANNEL_REQ 200 71 #define CMD_MAP_CHANNEL_RESP 201 72 #define CMD_GET_SOFTWARE_DETAILS_REQ 202 73 #define CMD_GET_SOFTWARE_DETAILS_RESP 203 74 #define CMD_EXTENDED 255 75 76 /* Minihydra extended command IDs */ 77 #define CMD_TX_CAN_MESSAGE_FD 224 78 #define CMD_TX_ACKNOWLEDGE_FD 225 79 #define CMD_RX_MESSAGE_FD 226 80 81 /* Hydra commands are handled by different threads in firmware. 82 * The threads are denoted hydra entity (HE). Each HE got a unique 6-bit 83 * address. The address is used in hydra commands to get/set source and 84 * destination HE. There are two predefined HE addresses, the remaining 85 * addresses are different between devices and firmware versions. Hence, we need 86 * to enumerate the addresses (see kvaser_usb_hydra_map_channel()). 87 */ 88 89 /* Well-known HE addresses */ 90 #define KVASER_USB_HYDRA_HE_ADDRESS_ROUTER 0x00 91 #define KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL 0x3e 92 93 #define KVASER_USB_HYDRA_TRANSID_CANHE 0x40 94 #define KVASER_USB_HYDRA_TRANSID_SYSDBG 0x61 95 96 struct kvaser_cmd_map_ch_req { 97 char name[16]; 98 u8 channel; 99 u8 reserved[11]; 100 } __packed; 101 102 struct kvaser_cmd_map_ch_res { 103 u8 he_addr; 104 u8 channel; 105 u8 reserved[26]; 106 } __packed; 107 108 struct kvaser_cmd_card_info { 109 __le32 serial_number; 110 __le32 clock_res; 111 __le32 mfg_date; 112 __le32 ean[2]; 113 u8 hw_version; 114 u8 usb_mode; 115 u8 hw_type; 116 u8 reserved0; 117 u8 nchannels; 118 u8 reserved1[3]; 119 } __packed; 120 121 struct kvaser_cmd_sw_info { 122 u8 reserved0[8]; 123 __le16 max_outstanding_tx; 124 u8 reserved1[18]; 125 } __packed; 126 127 struct kvaser_cmd_sw_detail_req { 128 u8 use_ext_cmd; 129 u8 reserved[27]; 130 } __packed; 131 132 /* Software detail flags */ 133 #define KVASER_USB_HYDRA_SW_FLAG_FW_BETA BIT(2) 134 #define KVASER_USB_HYDRA_SW_FLAG_FW_BAD BIT(4) 135 #define KVASER_USB_HYDRA_SW_FLAG_FREQ_80M BIT(5) 136 #define KVASER_USB_HYDRA_SW_FLAG_EXT_CMD BIT(9) 137 #define KVASER_USB_HYDRA_SW_FLAG_CANFD BIT(10) 138 #define KVASER_USB_HYDRA_SW_FLAG_NONISO BIT(11) 139 #define KVASER_USB_HYDRA_SW_FLAG_EXT_CAP BIT(12) 140 #define KVASER_USB_HYDRA_SW_FLAG_CAN_FREQ_80M BIT(13) 141 struct kvaser_cmd_sw_detail_res { 142 __le32 sw_flags; 143 __le32 sw_version; 144 __le32 sw_name; 145 __le32 ean[2]; 146 __le32 max_bitrate; 147 u8 reserved[4]; 148 } __packed; 149 150 /* Sub commands for cap_req and cap_res */ 151 #define KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE 0x02 152 #define KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT 0x05 153 #define KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT 0x06 154 struct kvaser_cmd_cap_req { 155 __le16 cap_cmd; 156 u8 reserved[26]; 157 } __packed; 158 159 /* Status codes for cap_res */ 160 #define KVASER_USB_HYDRA_CAP_STAT_OK 0x00 161 #define KVASER_USB_HYDRA_CAP_STAT_NOT_IMPL 0x01 162 #define KVASER_USB_HYDRA_CAP_STAT_UNAVAIL 0x02 163 struct kvaser_cmd_cap_res { 164 __le16 cap_cmd; 165 __le16 status; 166 __le32 mask; 167 __le32 value; 168 u8 reserved[16]; 169 } __packed; 170 171 /* CMD_ERROR_EVENT error codes */ 172 #define KVASER_USB_HYDRA_ERROR_EVENT_CAN 0x01 173 #define KVASER_USB_HYDRA_ERROR_EVENT_PARAM 0x09 174 struct kvaser_cmd_error_event { 175 __le16 timestamp[3]; 176 u8 reserved; 177 u8 error_code; 178 __le16 info1; 179 __le16 info2; 180 } __packed; 181 182 /* Chip state status flags. Used for chip_state_event and err_frame_data. */ 183 #define KVASER_USB_HYDRA_BUS_ERR_ACT 0x00 184 #define KVASER_USB_HYDRA_BUS_ERR_PASS BIT(5) 185 #define KVASER_USB_HYDRA_BUS_BUS_OFF BIT(6) 186 struct kvaser_cmd_chip_state_event { 187 __le16 timestamp[3]; 188 u8 tx_err_counter; 189 u8 rx_err_counter; 190 u8 bus_status; 191 u8 reserved[19]; 192 } __packed; 193 194 /* Busparam modes */ 195 #define KVASER_USB_HYDRA_BUS_MODE_CAN 0x00 196 #define KVASER_USB_HYDRA_BUS_MODE_CANFD_ISO 0x01 197 #define KVASER_USB_HYDRA_BUS_MODE_NONISO 0x02 198 struct kvaser_cmd_set_busparams { 199 __le32 bitrate; 200 u8 tseg1; 201 u8 tseg2; 202 u8 sjw; 203 u8 nsamples; 204 u8 reserved0[4]; 205 __le32 bitrate_d; 206 u8 tseg1_d; 207 u8 tseg2_d; 208 u8 sjw_d; 209 u8 nsamples_d; 210 u8 canfd_mode; 211 u8 reserved1[7]; 212 } __packed; 213 214 /* Ctrl modes */ 215 #define KVASER_USB_HYDRA_CTRLMODE_NORMAL 0x01 216 #define KVASER_USB_HYDRA_CTRLMODE_LISTEN 0x02 217 struct kvaser_cmd_set_ctrlmode { 218 u8 mode; 219 u8 reserved[27]; 220 } __packed; 221 222 struct kvaser_err_frame_data { 223 u8 bus_status; 224 u8 reserved0; 225 u8 tx_err_counter; 226 u8 rx_err_counter; 227 u8 reserved1[4]; 228 } __packed; 229 230 struct kvaser_cmd_rx_can { 231 u8 cmd_len; 232 u8 cmd_no; 233 u8 channel; 234 u8 flags; 235 __le16 timestamp[3]; 236 u8 dlc; 237 u8 padding; 238 __le32 id; 239 union { 240 u8 data[8]; 241 struct kvaser_err_frame_data err_frame_data; 242 }; 243 } __packed; 244 245 /* Extended CAN ID flag. Used in rx_can and tx_can */ 246 #define KVASER_USB_HYDRA_EXTENDED_FRAME_ID BIT(31) 247 struct kvaser_cmd_tx_can { 248 __le32 id; 249 u8 data[8]; 250 u8 dlc; 251 u8 flags; 252 __le16 transid; 253 u8 channel; 254 u8 reserved[11]; 255 } __packed; 256 257 struct kvaser_cmd_header { 258 u8 cmd_no; 259 /* The destination HE address is stored in 0..5 of he_addr. 260 * The upper part of source HE address is stored in 6..7 of he_addr, and 261 * the lower part is stored in 12..15 of transid. 262 */ 263 u8 he_addr; 264 __le16 transid; 265 } __packed; 266 267 struct kvaser_cmd { 268 struct kvaser_cmd_header header; 269 union { 270 struct kvaser_cmd_map_ch_req map_ch_req; 271 struct kvaser_cmd_map_ch_res map_ch_res; 272 273 struct kvaser_cmd_card_info card_info; 274 struct kvaser_cmd_sw_info sw_info; 275 struct kvaser_cmd_sw_detail_req sw_detail_req; 276 struct kvaser_cmd_sw_detail_res sw_detail_res; 277 278 struct kvaser_cmd_cap_req cap_req; 279 struct kvaser_cmd_cap_res cap_res; 280 281 struct kvaser_cmd_error_event error_event; 282 283 struct kvaser_cmd_set_busparams set_busparams_req; 284 285 struct kvaser_cmd_chip_state_event chip_state_event; 286 287 struct kvaser_cmd_set_ctrlmode set_ctrlmode; 288 289 struct kvaser_cmd_rx_can rx_can; 290 struct kvaser_cmd_tx_can tx_can; 291 } __packed; 292 } __packed; 293 294 /* CAN frame flags. Used in rx_can, ext_rx_can, tx_can and ext_tx_can */ 295 #define KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME BIT(0) 296 #define KVASER_USB_HYDRA_CF_FLAG_OVERRUN BIT(1) 297 #define KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME BIT(4) 298 #define KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID BIT(5) 299 #define KVASER_USB_HYDRA_CF_FLAG_TX_ACK BIT(6) 300 /* CAN frame flags. Used in ext_rx_can and ext_tx_can */ 301 #define KVASER_USB_HYDRA_CF_FLAG_OSM_NACK BIT(12) 302 #define KVASER_USB_HYDRA_CF_FLAG_ABL BIT(13) 303 #define KVASER_USB_HYDRA_CF_FLAG_FDF BIT(16) 304 #define KVASER_USB_HYDRA_CF_FLAG_BRS BIT(17) 305 #define KVASER_USB_HYDRA_CF_FLAG_ESI BIT(18) 306 307 /* KCAN packet header macros. Used in ext_rx_can and ext_tx_can */ 308 #define KVASER_USB_KCAN_DATA_DLC_BITS 4 309 #define KVASER_USB_KCAN_DATA_DLC_SHIFT 8 310 #define KVASER_USB_KCAN_DATA_DLC_MASK \ 311 GENMASK(KVASER_USB_KCAN_DATA_DLC_BITS - 1 + \ 312 KVASER_USB_KCAN_DATA_DLC_SHIFT, \ 313 KVASER_USB_KCAN_DATA_DLC_SHIFT) 314 315 #define KVASER_USB_KCAN_DATA_BRS BIT(14) 316 #define KVASER_USB_KCAN_DATA_FDF BIT(15) 317 #define KVASER_USB_KCAN_DATA_OSM BIT(16) 318 #define KVASER_USB_KCAN_DATA_AREQ BIT(31) 319 #define KVASER_USB_KCAN_DATA_SRR BIT(31) 320 #define KVASER_USB_KCAN_DATA_RTR BIT(29) 321 #define KVASER_USB_KCAN_DATA_IDE BIT(30) 322 struct kvaser_cmd_ext_rx_can { 323 __le32 flags; 324 __le32 id; 325 __le32 kcan_id; 326 __le32 kcan_header; 327 __le64 timestamp; 328 union { 329 u8 kcan_payload[64]; 330 struct kvaser_err_frame_data err_frame_data; 331 }; 332 } __packed; 333 334 struct kvaser_cmd_ext_tx_can { 335 __le32 flags; 336 __le32 id; 337 __le32 kcan_id; 338 __le32 kcan_header; 339 u8 databytes; 340 u8 dlc; 341 u8 reserved[6]; 342 u8 kcan_payload[64]; 343 } __packed; 344 345 struct kvaser_cmd_ext_tx_ack { 346 __le32 flags; 347 u8 reserved0[4]; 348 __le64 timestamp; 349 u8 reserved1[8]; 350 } __packed; 351 352 /* struct for extended commands (CMD_EXTENDED) */ 353 struct kvaser_cmd_ext { 354 struct kvaser_cmd_header header; 355 __le16 len; 356 u8 cmd_no_ext; 357 u8 reserved; 358 359 union { 360 struct kvaser_cmd_ext_rx_can rx_can; 361 struct kvaser_cmd_ext_tx_can tx_can; 362 struct kvaser_cmd_ext_tx_ack tx_ack; 363 } __packed; 364 } __packed; 365 366 static const struct can_bittiming_const kvaser_usb_hydra_kcan_bittiming_c = { 367 .name = "kvaser_usb_kcan", 368 .tseg1_min = 1, 369 .tseg1_max = 255, 370 .tseg2_min = 1, 371 .tseg2_max = 32, 372 .sjw_max = 16, 373 .brp_min = 1, 374 .brp_max = 8192, 375 .brp_inc = 1, 376 }; 377 378 const struct can_bittiming_const kvaser_usb_flexc_bittiming_const = { 379 .name = "kvaser_usb_flex", 380 .tseg1_min = 4, 381 .tseg1_max = 16, 382 .tseg2_min = 2, 383 .tseg2_max = 8, 384 .sjw_max = 4, 385 .brp_min = 1, 386 .brp_max = 256, 387 .brp_inc = 1, 388 }; 389 390 static const struct can_bittiming_const kvaser_usb_hydra_rt_bittiming_c = { 391 .name = "kvaser_usb_rt", 392 .tseg1_min = 2, 393 .tseg1_max = 96, 394 .tseg2_min = 2, 395 .tseg2_max = 32, 396 .sjw_max = 32, 397 .brp_min = 1, 398 .brp_max = 1024, 399 .brp_inc = 1, 400 }; 401 402 static const struct can_bittiming_const kvaser_usb_hydra_rtd_bittiming_c = { 403 .name = "kvaser_usb_rt", 404 .tseg1_min = 2, 405 .tseg1_max = 39, 406 .tseg2_min = 2, 407 .tseg2_max = 8, 408 .sjw_max = 8, 409 .brp_min = 1, 410 .brp_max = 1024, 411 .brp_inc = 1, 412 }; 413 414 #define KVASER_USB_HYDRA_TRANSID_BITS 12 415 #define KVASER_USB_HYDRA_TRANSID_MASK \ 416 GENMASK(KVASER_USB_HYDRA_TRANSID_BITS - 1, 0) 417 #define KVASER_USB_HYDRA_HE_ADDR_SRC_MASK GENMASK(7, 6) 418 #define KVASER_USB_HYDRA_HE_ADDR_DEST_MASK GENMASK(5, 0) 419 #define KVASER_USB_HYDRA_HE_ADDR_SRC_BITS 2 420 static inline u16 kvaser_usb_hydra_get_cmd_transid(const struct kvaser_cmd *cmd) 421 { 422 return le16_to_cpu(cmd->header.transid) & KVASER_USB_HYDRA_TRANSID_MASK; 423 } 424 425 static inline void kvaser_usb_hydra_set_cmd_transid(struct kvaser_cmd *cmd, 426 u16 transid) 427 { 428 cmd->header.transid = 429 cpu_to_le16(transid & KVASER_USB_HYDRA_TRANSID_MASK); 430 } 431 432 static inline u8 kvaser_usb_hydra_get_cmd_src_he(const struct kvaser_cmd *cmd) 433 { 434 return (cmd->header.he_addr & KVASER_USB_HYDRA_HE_ADDR_SRC_MASK) >> 435 KVASER_USB_HYDRA_HE_ADDR_SRC_BITS | 436 le16_to_cpu(cmd->header.transid) >> 437 KVASER_USB_HYDRA_TRANSID_BITS; 438 } 439 440 static inline void kvaser_usb_hydra_set_cmd_dest_he(struct kvaser_cmd *cmd, 441 u8 dest_he) 442 { 443 cmd->header.he_addr = 444 (cmd->header.he_addr & KVASER_USB_HYDRA_HE_ADDR_SRC_MASK) | 445 (dest_he & KVASER_USB_HYDRA_HE_ADDR_DEST_MASK); 446 } 447 448 static u8 kvaser_usb_hydra_channel_from_cmd(const struct kvaser_usb *dev, 449 const struct kvaser_cmd *cmd) 450 { 451 int i; 452 u8 channel = 0xff; 453 u8 src_he = kvaser_usb_hydra_get_cmd_src_he(cmd); 454 455 for (i = 0; i < KVASER_USB_MAX_NET_DEVICES; i++) { 456 if (dev->card_data.hydra.channel_to_he[i] == src_he) { 457 channel = i; 458 break; 459 } 460 } 461 462 return channel; 463 } 464 465 static u16 kvaser_usb_hydra_get_next_transid(struct kvaser_usb *dev) 466 { 467 unsigned long flags; 468 u16 transid; 469 struct kvaser_usb_dev_card_data_hydra *card_data = 470 &dev->card_data.hydra; 471 472 spin_lock_irqsave(&card_data->transid_lock, flags); 473 transid = card_data->transid; 474 if (transid >= KVASER_USB_HYDRA_MAX_TRANSID) 475 transid = KVASER_USB_HYDRA_MIN_TRANSID; 476 else 477 transid++; 478 card_data->transid = transid; 479 spin_unlock_irqrestore(&card_data->transid_lock, flags); 480 481 return transid; 482 } 483 484 static size_t kvaser_usb_hydra_cmd_size(struct kvaser_cmd *cmd) 485 { 486 size_t ret; 487 488 if (cmd->header.cmd_no == CMD_EXTENDED) 489 ret = le16_to_cpu(((struct kvaser_cmd_ext *)cmd)->len); 490 else 491 ret = sizeof(struct kvaser_cmd); 492 493 return ret; 494 } 495 496 static struct kvaser_usb_net_priv * 497 kvaser_usb_hydra_net_priv_from_cmd(const struct kvaser_usb *dev, 498 const struct kvaser_cmd *cmd) 499 { 500 struct kvaser_usb_net_priv *priv = NULL; 501 u8 channel = kvaser_usb_hydra_channel_from_cmd(dev, cmd); 502 503 if (channel >= dev->nchannels) 504 dev_err(&dev->intf->dev, 505 "Invalid channel number (%d)\n", channel); 506 else 507 priv = dev->nets[channel]; 508 509 return priv; 510 } 511 512 static ktime_t 513 kvaser_usb_hydra_ktime_from_rx_cmd(const struct kvaser_usb_dev_cfg *cfg, 514 const struct kvaser_cmd *cmd) 515 { 516 u64 ticks; 517 518 if (cmd->header.cmd_no == CMD_EXTENDED) { 519 struct kvaser_cmd_ext *cmd_ext = (struct kvaser_cmd_ext *)cmd; 520 521 ticks = le64_to_cpu(cmd_ext->rx_can.timestamp); 522 } else { 523 ticks = le16_to_cpu(cmd->rx_can.timestamp[0]); 524 ticks += (u64)(le16_to_cpu(cmd->rx_can.timestamp[1])) << 16; 525 ticks += (u64)(le16_to_cpu(cmd->rx_can.timestamp[2])) << 32; 526 } 527 528 return ns_to_ktime(div_u64(ticks * 1000, cfg->timestamp_freq)); 529 } 530 531 static int kvaser_usb_hydra_send_simple_cmd(struct kvaser_usb *dev, 532 u8 cmd_no, int channel) 533 { 534 struct kvaser_cmd *cmd; 535 int err; 536 537 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 538 if (!cmd) 539 return -ENOMEM; 540 541 cmd->header.cmd_no = cmd_no; 542 if (channel < 0) { 543 kvaser_usb_hydra_set_cmd_dest_he 544 (cmd, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL); 545 } else { 546 if (channel >= KVASER_USB_MAX_NET_DEVICES) { 547 dev_err(&dev->intf->dev, "channel (%d) out of range.\n", 548 channel); 549 err = -EINVAL; 550 goto end; 551 } 552 kvaser_usb_hydra_set_cmd_dest_he 553 (cmd, dev->card_data.hydra.channel_to_he[channel]); 554 } 555 kvaser_usb_hydra_set_cmd_transid 556 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 557 558 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 559 if (err) 560 goto end; 561 562 end: 563 kfree(cmd); 564 565 return err; 566 } 567 568 static int 569 kvaser_usb_hydra_send_simple_cmd_async(struct kvaser_usb_net_priv *priv, 570 u8 cmd_no) 571 { 572 struct kvaser_cmd *cmd; 573 struct kvaser_usb *dev = priv->dev; 574 int err; 575 576 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_ATOMIC); 577 if (!cmd) 578 return -ENOMEM; 579 580 cmd->header.cmd_no = cmd_no; 581 582 kvaser_usb_hydra_set_cmd_dest_he 583 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 584 kvaser_usb_hydra_set_cmd_transid 585 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 586 587 err = kvaser_usb_send_cmd_async(priv, cmd, 588 kvaser_usb_hydra_cmd_size(cmd)); 589 if (err) 590 kfree(cmd); 591 592 return err; 593 } 594 595 /* This function is used for synchronously waiting on hydra control commands. 596 * Note: Compared to kvaser_usb_hydra_read_bulk_callback(), we never need to 597 * handle partial hydra commands. Since hydra control commands are always 598 * non-extended commands. 599 */ 600 static int kvaser_usb_hydra_wait_cmd(const struct kvaser_usb *dev, u8 cmd_no, 601 struct kvaser_cmd *cmd) 602 { 603 void *buf; 604 int err; 605 unsigned long timeout = jiffies + msecs_to_jiffies(KVASER_USB_TIMEOUT); 606 607 if (cmd->header.cmd_no == CMD_EXTENDED) { 608 dev_err(&dev->intf->dev, "Wait for CMD_EXTENDED not allowed\n"); 609 return -EINVAL; 610 } 611 612 buf = kzalloc(KVASER_USB_RX_BUFFER_SIZE, GFP_KERNEL); 613 if (!buf) 614 return -ENOMEM; 615 616 do { 617 int actual_len = 0; 618 int pos = 0; 619 620 err = kvaser_usb_recv_cmd(dev, buf, KVASER_USB_RX_BUFFER_SIZE, 621 &actual_len); 622 if (err < 0) 623 goto end; 624 625 while (pos < actual_len) { 626 struct kvaser_cmd *tmp_cmd; 627 size_t cmd_len; 628 629 tmp_cmd = buf + pos; 630 cmd_len = kvaser_usb_hydra_cmd_size(tmp_cmd); 631 if (pos + cmd_len > actual_len) { 632 dev_err_ratelimited(&dev->intf->dev, 633 "Format error\n"); 634 break; 635 } 636 637 if (tmp_cmd->header.cmd_no == cmd_no) { 638 memcpy(cmd, tmp_cmd, cmd_len); 639 goto end; 640 } 641 pos += cmd_len; 642 } 643 } while (time_before(jiffies, timeout)); 644 645 err = -EINVAL; 646 647 end: 648 kfree(buf); 649 650 return err; 651 } 652 653 static int kvaser_usb_hydra_map_channel_resp(struct kvaser_usb *dev, 654 const struct kvaser_cmd *cmd) 655 { 656 u8 he, channel; 657 u16 transid = kvaser_usb_hydra_get_cmd_transid(cmd); 658 struct kvaser_usb_dev_card_data_hydra *card_data = 659 &dev->card_data.hydra; 660 661 if (transid > 0x007f || transid < 0x0040) { 662 dev_err(&dev->intf->dev, 663 "CMD_MAP_CHANNEL_RESP, invalid transid: 0x%x\n", 664 transid); 665 return -EINVAL; 666 } 667 668 switch (transid) { 669 case KVASER_USB_HYDRA_TRANSID_CANHE: 670 case KVASER_USB_HYDRA_TRANSID_CANHE + 1: 671 case KVASER_USB_HYDRA_TRANSID_CANHE + 2: 672 case KVASER_USB_HYDRA_TRANSID_CANHE + 3: 673 case KVASER_USB_HYDRA_TRANSID_CANHE + 4: 674 channel = transid & 0x000f; 675 he = cmd->map_ch_res.he_addr; 676 card_data->channel_to_he[channel] = he; 677 break; 678 case KVASER_USB_HYDRA_TRANSID_SYSDBG: 679 card_data->sysdbg_he = cmd->map_ch_res.he_addr; 680 break; 681 default: 682 dev_warn(&dev->intf->dev, 683 "Unknown CMD_MAP_CHANNEL_RESP transid=0x%x\n", 684 transid); 685 break; 686 } 687 688 return 0; 689 } 690 691 static int kvaser_usb_hydra_map_channel(struct kvaser_usb *dev, u16 transid, 692 u8 channel, const char *name) 693 { 694 struct kvaser_cmd *cmd; 695 int err; 696 697 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 698 if (!cmd) 699 return -ENOMEM; 700 701 strcpy(cmd->map_ch_req.name, name); 702 cmd->header.cmd_no = CMD_MAP_CHANNEL_REQ; 703 kvaser_usb_hydra_set_cmd_dest_he 704 (cmd, KVASER_USB_HYDRA_HE_ADDRESS_ROUTER); 705 cmd->map_ch_req.channel = channel; 706 707 kvaser_usb_hydra_set_cmd_transid(cmd, transid); 708 709 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 710 if (err) 711 goto end; 712 713 err = kvaser_usb_hydra_wait_cmd(dev, CMD_MAP_CHANNEL_RESP, cmd); 714 if (err) 715 goto end; 716 717 err = kvaser_usb_hydra_map_channel_resp(dev, cmd); 718 if (err) 719 goto end; 720 721 end: 722 kfree(cmd); 723 724 return err; 725 } 726 727 static int kvaser_usb_hydra_get_single_capability(struct kvaser_usb *dev, 728 u16 cap_cmd_req, u16 *status) 729 { 730 struct kvaser_usb_dev_card_data *card_data = &dev->card_data; 731 struct kvaser_cmd *cmd; 732 u32 value = 0; 733 u32 mask = 0; 734 u16 cap_cmd_res; 735 int err; 736 int i; 737 738 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 739 if (!cmd) 740 return -ENOMEM; 741 742 cmd->header.cmd_no = CMD_GET_CAPABILITIES_REQ; 743 cmd->cap_req.cap_cmd = cpu_to_le16(cap_cmd_req); 744 745 kvaser_usb_hydra_set_cmd_dest_he(cmd, card_data->hydra.sysdbg_he); 746 kvaser_usb_hydra_set_cmd_transid 747 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 748 749 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 750 if (err) 751 goto end; 752 753 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_CAPABILITIES_RESP, cmd); 754 if (err) 755 goto end; 756 757 *status = le16_to_cpu(cmd->cap_res.status); 758 759 if (*status != KVASER_USB_HYDRA_CAP_STAT_OK) 760 goto end; 761 762 cap_cmd_res = le16_to_cpu(cmd->cap_res.cap_cmd); 763 switch (cap_cmd_res) { 764 case KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE: 765 case KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT: 766 case KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT: 767 value = le32_to_cpu(cmd->cap_res.value); 768 mask = le32_to_cpu(cmd->cap_res.mask); 769 break; 770 default: 771 dev_warn(&dev->intf->dev, "Unknown capability command %u\n", 772 cap_cmd_res); 773 break; 774 } 775 776 for (i = 0; i < dev->nchannels; i++) { 777 if (BIT(i) & (value & mask)) { 778 switch (cap_cmd_res) { 779 case KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE: 780 card_data->ctrlmode_supported |= 781 CAN_CTRLMODE_LISTENONLY; 782 break; 783 case KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT: 784 card_data->capabilities |= 785 KVASER_USB_CAP_BERR_CAP; 786 break; 787 case KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT: 788 card_data->ctrlmode_supported |= 789 CAN_CTRLMODE_ONE_SHOT; 790 break; 791 } 792 } 793 } 794 795 end: 796 kfree(cmd); 797 798 return err; 799 } 800 801 static void kvaser_usb_hydra_start_chip_reply(const struct kvaser_usb *dev, 802 const struct kvaser_cmd *cmd) 803 { 804 struct kvaser_usb_net_priv *priv; 805 806 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 807 if (!priv) 808 return; 809 810 if (completion_done(&priv->start_comp) && 811 netif_queue_stopped(priv->netdev)) { 812 netif_wake_queue(priv->netdev); 813 } else { 814 netif_start_queue(priv->netdev); 815 complete(&priv->start_comp); 816 } 817 } 818 819 static void kvaser_usb_hydra_stop_chip_reply(const struct kvaser_usb *dev, 820 const struct kvaser_cmd *cmd) 821 { 822 struct kvaser_usb_net_priv *priv; 823 824 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 825 if (!priv) 826 return; 827 828 complete(&priv->stop_comp); 829 } 830 831 static void kvaser_usb_hydra_flush_queue_reply(const struct kvaser_usb *dev, 832 const struct kvaser_cmd *cmd) 833 { 834 struct kvaser_usb_net_priv *priv; 835 836 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 837 if (!priv) 838 return; 839 840 complete(&priv->flush_comp); 841 } 842 843 static void 844 kvaser_usb_hydra_bus_status_to_can_state(const struct kvaser_usb_net_priv *priv, 845 u8 bus_status, 846 const struct can_berr_counter *bec, 847 enum can_state *new_state) 848 { 849 if (bus_status & KVASER_USB_HYDRA_BUS_BUS_OFF) { 850 *new_state = CAN_STATE_BUS_OFF; 851 } else if (bus_status & KVASER_USB_HYDRA_BUS_ERR_PASS) { 852 *new_state = CAN_STATE_ERROR_PASSIVE; 853 } else if (bus_status == KVASER_USB_HYDRA_BUS_ERR_ACT) { 854 if (bec->txerr >= 128 || bec->rxerr >= 128) { 855 netdev_warn(priv->netdev, 856 "ERR_ACTIVE but err tx=%u or rx=%u >=128\n", 857 bec->txerr, bec->rxerr); 858 *new_state = CAN_STATE_ERROR_PASSIVE; 859 } else if (bec->txerr >= 96 || bec->rxerr >= 96) { 860 *new_state = CAN_STATE_ERROR_WARNING; 861 } else { 862 *new_state = CAN_STATE_ERROR_ACTIVE; 863 } 864 } 865 } 866 867 static void kvaser_usb_hydra_update_state(struct kvaser_usb_net_priv *priv, 868 u8 bus_status, 869 const struct can_berr_counter *bec) 870 { 871 struct net_device *netdev = priv->netdev; 872 struct can_frame *cf; 873 struct sk_buff *skb; 874 enum can_state new_state, old_state; 875 876 old_state = priv->can.state; 877 878 kvaser_usb_hydra_bus_status_to_can_state(priv, bus_status, bec, 879 &new_state); 880 881 if (new_state == old_state) 882 return; 883 884 /* Ignore state change if previous state was STOPPED and the new state 885 * is BUS_OFF. Firmware always report this as BUS_OFF, since firmware 886 * does not distinguish between BUS_OFF and STOPPED. 887 */ 888 if (old_state == CAN_STATE_STOPPED && new_state == CAN_STATE_BUS_OFF) 889 return; 890 891 skb = alloc_can_err_skb(netdev, &cf); 892 if (skb) { 893 enum can_state tx_state, rx_state; 894 895 tx_state = (bec->txerr >= bec->rxerr) ? 896 new_state : CAN_STATE_ERROR_ACTIVE; 897 rx_state = (bec->txerr <= bec->rxerr) ? 898 new_state : CAN_STATE_ERROR_ACTIVE; 899 can_change_state(netdev, cf, tx_state, rx_state); 900 } 901 902 if (new_state == CAN_STATE_BUS_OFF && old_state < CAN_STATE_BUS_OFF) { 903 if (!priv->can.restart_ms) 904 kvaser_usb_hydra_send_simple_cmd_async 905 (priv, CMD_STOP_CHIP_REQ); 906 907 can_bus_off(netdev); 908 } 909 910 if (!skb) { 911 netdev_warn(netdev, "No memory left for err_skb\n"); 912 return; 913 } 914 915 if (priv->can.restart_ms && 916 old_state >= CAN_STATE_BUS_OFF && 917 new_state < CAN_STATE_BUS_OFF) 918 priv->can.can_stats.restarts++; 919 920 cf->data[6] = bec->txerr; 921 cf->data[7] = bec->rxerr; 922 923 netif_rx(skb); 924 } 925 926 static void kvaser_usb_hydra_state_event(const struct kvaser_usb *dev, 927 const struct kvaser_cmd *cmd) 928 { 929 struct kvaser_usb_net_priv *priv; 930 struct can_berr_counter bec; 931 u8 bus_status; 932 933 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 934 if (!priv) 935 return; 936 937 bus_status = cmd->chip_state_event.bus_status; 938 bec.txerr = cmd->chip_state_event.tx_err_counter; 939 bec.rxerr = cmd->chip_state_event.rx_err_counter; 940 941 kvaser_usb_hydra_update_state(priv, bus_status, &bec); 942 priv->bec.txerr = bec.txerr; 943 priv->bec.rxerr = bec.rxerr; 944 } 945 946 static void kvaser_usb_hydra_error_event_parameter(const struct kvaser_usb *dev, 947 const struct kvaser_cmd *cmd) 948 { 949 /* info1 will contain the offending cmd_no */ 950 switch (le16_to_cpu(cmd->error_event.info1)) { 951 case CMD_START_CHIP_REQ: 952 dev_warn(&dev->intf->dev, 953 "CMD_START_CHIP_REQ error in parameter\n"); 954 break; 955 956 case CMD_STOP_CHIP_REQ: 957 dev_warn(&dev->intf->dev, 958 "CMD_STOP_CHIP_REQ error in parameter\n"); 959 break; 960 961 case CMD_FLUSH_QUEUE: 962 dev_warn(&dev->intf->dev, 963 "CMD_FLUSH_QUEUE error in parameter\n"); 964 break; 965 966 case CMD_SET_BUSPARAMS_REQ: 967 dev_warn(&dev->intf->dev, 968 "Set bittiming failed. Error in parameter\n"); 969 break; 970 971 case CMD_SET_BUSPARAMS_FD_REQ: 972 dev_warn(&dev->intf->dev, 973 "Set data bittiming failed. Error in parameter\n"); 974 break; 975 976 default: 977 dev_warn(&dev->intf->dev, 978 "Unhandled parameter error event cmd_no (%u)\n", 979 le16_to_cpu(cmd->error_event.info1)); 980 break; 981 } 982 } 983 984 static void kvaser_usb_hydra_error_event(const struct kvaser_usb *dev, 985 const struct kvaser_cmd *cmd) 986 { 987 switch (cmd->error_event.error_code) { 988 case KVASER_USB_HYDRA_ERROR_EVENT_PARAM: 989 kvaser_usb_hydra_error_event_parameter(dev, cmd); 990 break; 991 992 case KVASER_USB_HYDRA_ERROR_EVENT_CAN: 993 /* Wrong channel mapping?! This should never happen! 994 * info1 will contain the offending cmd_no 995 */ 996 dev_err(&dev->intf->dev, 997 "Received CAN error event for cmd_no (%u)\n", 998 le16_to_cpu(cmd->error_event.info1)); 999 break; 1000 1001 default: 1002 dev_warn(&dev->intf->dev, 1003 "Unhandled error event (%d)\n", 1004 cmd->error_event.error_code); 1005 break; 1006 } 1007 } 1008 1009 static void 1010 kvaser_usb_hydra_error_frame(struct kvaser_usb_net_priv *priv, 1011 const struct kvaser_err_frame_data *err_frame_data, 1012 ktime_t hwtstamp) 1013 { 1014 struct net_device *netdev = priv->netdev; 1015 struct net_device_stats *stats = &netdev->stats; 1016 struct can_frame *cf; 1017 struct sk_buff *skb; 1018 struct skb_shared_hwtstamps *shhwtstamps; 1019 struct can_berr_counter bec; 1020 enum can_state new_state, old_state; 1021 u8 bus_status; 1022 1023 priv->can.can_stats.bus_error++; 1024 stats->rx_errors++; 1025 1026 bus_status = err_frame_data->bus_status; 1027 bec.txerr = err_frame_data->tx_err_counter; 1028 bec.rxerr = err_frame_data->rx_err_counter; 1029 1030 old_state = priv->can.state; 1031 kvaser_usb_hydra_bus_status_to_can_state(priv, bus_status, &bec, 1032 &new_state); 1033 1034 skb = alloc_can_err_skb(netdev, &cf); 1035 1036 if (new_state != old_state) { 1037 if (skb) { 1038 enum can_state tx_state, rx_state; 1039 1040 tx_state = (bec.txerr >= bec.rxerr) ? 1041 new_state : CAN_STATE_ERROR_ACTIVE; 1042 rx_state = (bec.txerr <= bec.rxerr) ? 1043 new_state : CAN_STATE_ERROR_ACTIVE; 1044 1045 can_change_state(netdev, cf, tx_state, rx_state); 1046 1047 if (priv->can.restart_ms && 1048 old_state >= CAN_STATE_BUS_OFF && 1049 new_state < CAN_STATE_BUS_OFF) 1050 cf->can_id |= CAN_ERR_RESTARTED; 1051 } 1052 1053 if (new_state == CAN_STATE_BUS_OFF) { 1054 if (!priv->can.restart_ms) 1055 kvaser_usb_hydra_send_simple_cmd_async 1056 (priv, CMD_STOP_CHIP_REQ); 1057 1058 can_bus_off(netdev); 1059 } 1060 } 1061 1062 if (!skb) { 1063 stats->rx_dropped++; 1064 netdev_warn(netdev, "No memory left for err_skb\n"); 1065 return; 1066 } 1067 1068 shhwtstamps = skb_hwtstamps(skb); 1069 shhwtstamps->hwtstamp = hwtstamp; 1070 1071 cf->can_id |= CAN_ERR_BUSERROR; 1072 cf->data[6] = bec.txerr; 1073 cf->data[7] = bec.rxerr; 1074 1075 netif_rx(skb); 1076 1077 priv->bec.txerr = bec.txerr; 1078 priv->bec.rxerr = bec.rxerr; 1079 } 1080 1081 static void kvaser_usb_hydra_one_shot_fail(struct kvaser_usb_net_priv *priv, 1082 const struct kvaser_cmd_ext *cmd) 1083 { 1084 struct net_device *netdev = priv->netdev; 1085 struct net_device_stats *stats = &netdev->stats; 1086 struct can_frame *cf; 1087 struct sk_buff *skb; 1088 u32 flags; 1089 1090 skb = alloc_can_err_skb(netdev, &cf); 1091 if (!skb) { 1092 stats->rx_dropped++; 1093 netdev_warn(netdev, "No memory left for err_skb\n"); 1094 return; 1095 } 1096 1097 cf->can_id |= CAN_ERR_BUSERROR; 1098 flags = le32_to_cpu(cmd->tx_ack.flags); 1099 1100 if (flags & KVASER_USB_HYDRA_CF_FLAG_OSM_NACK) 1101 cf->can_id |= CAN_ERR_ACK; 1102 if (flags & KVASER_USB_HYDRA_CF_FLAG_ABL) { 1103 cf->can_id |= CAN_ERR_LOSTARB; 1104 priv->can.can_stats.arbitration_lost++; 1105 } 1106 1107 stats->tx_errors++; 1108 netif_rx(skb); 1109 } 1110 1111 static void kvaser_usb_hydra_tx_acknowledge(const struct kvaser_usb *dev, 1112 const struct kvaser_cmd *cmd) 1113 { 1114 struct kvaser_usb_tx_urb_context *context; 1115 struct kvaser_usb_net_priv *priv; 1116 unsigned long irq_flags; 1117 unsigned int len; 1118 bool one_shot_fail = false; 1119 bool is_err_frame = false; 1120 u16 transid = kvaser_usb_hydra_get_cmd_transid(cmd); 1121 1122 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 1123 if (!priv) 1124 return; 1125 1126 if (!netif_device_present(priv->netdev)) 1127 return; 1128 1129 if (cmd->header.cmd_no == CMD_EXTENDED) { 1130 struct kvaser_cmd_ext *cmd_ext = (struct kvaser_cmd_ext *)cmd; 1131 u32 flags = le32_to_cpu(cmd_ext->tx_ack.flags); 1132 1133 if (flags & (KVASER_USB_HYDRA_CF_FLAG_OSM_NACK | 1134 KVASER_USB_HYDRA_CF_FLAG_ABL)) { 1135 kvaser_usb_hydra_one_shot_fail(priv, cmd_ext); 1136 one_shot_fail = true; 1137 } 1138 1139 is_err_frame = flags & KVASER_USB_HYDRA_CF_FLAG_TX_ACK && 1140 flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME; 1141 } 1142 1143 context = &priv->tx_contexts[transid % dev->max_tx_urbs]; 1144 1145 spin_lock_irqsave(&priv->tx_contexts_lock, irq_flags); 1146 1147 len = can_get_echo_skb(priv->netdev, context->echo_index, NULL); 1148 context->echo_index = dev->max_tx_urbs; 1149 --priv->active_tx_contexts; 1150 netif_wake_queue(priv->netdev); 1151 1152 spin_unlock_irqrestore(&priv->tx_contexts_lock, irq_flags); 1153 1154 if (!one_shot_fail && !is_err_frame) { 1155 struct net_device_stats *stats = &priv->netdev->stats; 1156 1157 stats->tx_packets++; 1158 stats->tx_bytes += len; 1159 } 1160 } 1161 1162 static void kvaser_usb_hydra_rx_msg_std(const struct kvaser_usb *dev, 1163 const struct kvaser_cmd *cmd) 1164 { 1165 struct kvaser_usb_net_priv *priv = NULL; 1166 struct can_frame *cf; 1167 struct sk_buff *skb; 1168 struct skb_shared_hwtstamps *shhwtstamps; 1169 struct net_device_stats *stats; 1170 u8 flags; 1171 ktime_t hwtstamp; 1172 1173 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 1174 if (!priv) 1175 return; 1176 1177 stats = &priv->netdev->stats; 1178 1179 flags = cmd->rx_can.flags; 1180 hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, cmd); 1181 1182 if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) { 1183 kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data, 1184 hwtstamp); 1185 return; 1186 } 1187 1188 skb = alloc_can_skb(priv->netdev, &cf); 1189 if (!skb) { 1190 stats->rx_dropped++; 1191 return; 1192 } 1193 1194 shhwtstamps = skb_hwtstamps(skb); 1195 shhwtstamps->hwtstamp = hwtstamp; 1196 1197 cf->can_id = le32_to_cpu(cmd->rx_can.id); 1198 1199 if (cf->can_id & KVASER_USB_HYDRA_EXTENDED_FRAME_ID) { 1200 cf->can_id &= CAN_EFF_MASK; 1201 cf->can_id |= CAN_EFF_FLAG; 1202 } else { 1203 cf->can_id &= CAN_SFF_MASK; 1204 } 1205 1206 if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN) 1207 kvaser_usb_can_rx_over_error(priv->netdev); 1208 1209 cf->len = can_cc_dlc2len(cmd->rx_can.dlc); 1210 1211 if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) { 1212 cf->can_id |= CAN_RTR_FLAG; 1213 } else { 1214 memcpy(cf->data, cmd->rx_can.data, cf->len); 1215 1216 stats->rx_bytes += cf->len; 1217 } 1218 stats->rx_packets++; 1219 1220 netif_rx(skb); 1221 } 1222 1223 static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev, 1224 const struct kvaser_cmd_ext *cmd) 1225 { 1226 struct kvaser_cmd *std_cmd = (struct kvaser_cmd *)cmd; 1227 struct kvaser_usb_net_priv *priv; 1228 struct canfd_frame *cf; 1229 struct sk_buff *skb; 1230 struct skb_shared_hwtstamps *shhwtstamps; 1231 struct net_device_stats *stats; 1232 u32 flags; 1233 u8 dlc; 1234 u32 kcan_header; 1235 ktime_t hwtstamp; 1236 1237 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, std_cmd); 1238 if (!priv) 1239 return; 1240 1241 stats = &priv->netdev->stats; 1242 1243 kcan_header = le32_to_cpu(cmd->rx_can.kcan_header); 1244 dlc = (kcan_header & KVASER_USB_KCAN_DATA_DLC_MASK) >> 1245 KVASER_USB_KCAN_DATA_DLC_SHIFT; 1246 1247 flags = le32_to_cpu(cmd->rx_can.flags); 1248 hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, std_cmd); 1249 1250 if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) { 1251 kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data, 1252 hwtstamp); 1253 return; 1254 } 1255 1256 if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) 1257 skb = alloc_canfd_skb(priv->netdev, &cf); 1258 else 1259 skb = alloc_can_skb(priv->netdev, (struct can_frame **)&cf); 1260 1261 if (!skb) { 1262 stats->rx_dropped++; 1263 return; 1264 } 1265 1266 shhwtstamps = skb_hwtstamps(skb); 1267 shhwtstamps->hwtstamp = hwtstamp; 1268 1269 cf->can_id = le32_to_cpu(cmd->rx_can.id); 1270 1271 if (flags & KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID) { 1272 cf->can_id &= CAN_EFF_MASK; 1273 cf->can_id |= CAN_EFF_FLAG; 1274 } else { 1275 cf->can_id &= CAN_SFF_MASK; 1276 } 1277 1278 if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN) 1279 kvaser_usb_can_rx_over_error(priv->netdev); 1280 1281 if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) { 1282 cf->len = can_fd_dlc2len(dlc); 1283 if (flags & KVASER_USB_HYDRA_CF_FLAG_BRS) 1284 cf->flags |= CANFD_BRS; 1285 if (flags & KVASER_USB_HYDRA_CF_FLAG_ESI) 1286 cf->flags |= CANFD_ESI; 1287 } else { 1288 cf->len = can_cc_dlc2len(dlc); 1289 } 1290 1291 if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) { 1292 cf->can_id |= CAN_RTR_FLAG; 1293 } else { 1294 memcpy(cf->data, cmd->rx_can.kcan_payload, cf->len); 1295 1296 stats->rx_bytes += cf->len; 1297 } 1298 stats->rx_packets++; 1299 1300 netif_rx(skb); 1301 } 1302 1303 static void kvaser_usb_hydra_handle_cmd_std(const struct kvaser_usb *dev, 1304 const struct kvaser_cmd *cmd) 1305 { 1306 switch (cmd->header.cmd_no) { 1307 case CMD_START_CHIP_RESP: 1308 kvaser_usb_hydra_start_chip_reply(dev, cmd); 1309 break; 1310 1311 case CMD_STOP_CHIP_RESP: 1312 kvaser_usb_hydra_stop_chip_reply(dev, cmd); 1313 break; 1314 1315 case CMD_FLUSH_QUEUE_RESP: 1316 kvaser_usb_hydra_flush_queue_reply(dev, cmd); 1317 break; 1318 1319 case CMD_CHIP_STATE_EVENT: 1320 kvaser_usb_hydra_state_event(dev, cmd); 1321 break; 1322 1323 case CMD_ERROR_EVENT: 1324 kvaser_usb_hydra_error_event(dev, cmd); 1325 break; 1326 1327 case CMD_TX_ACKNOWLEDGE: 1328 kvaser_usb_hydra_tx_acknowledge(dev, cmd); 1329 break; 1330 1331 case CMD_RX_MESSAGE: 1332 kvaser_usb_hydra_rx_msg_std(dev, cmd); 1333 break; 1334 1335 /* Ignored commands */ 1336 case CMD_SET_BUSPARAMS_RESP: 1337 case CMD_SET_BUSPARAMS_FD_RESP: 1338 break; 1339 1340 default: 1341 dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", 1342 cmd->header.cmd_no); 1343 break; 1344 } 1345 } 1346 1347 static void kvaser_usb_hydra_handle_cmd_ext(const struct kvaser_usb *dev, 1348 const struct kvaser_cmd_ext *cmd) 1349 { 1350 switch (cmd->cmd_no_ext) { 1351 case CMD_TX_ACKNOWLEDGE_FD: 1352 kvaser_usb_hydra_tx_acknowledge(dev, (struct kvaser_cmd *)cmd); 1353 break; 1354 1355 case CMD_RX_MESSAGE_FD: 1356 kvaser_usb_hydra_rx_msg_ext(dev, cmd); 1357 break; 1358 1359 default: 1360 dev_warn(&dev->intf->dev, "Unhandled extended command (%d)\n", 1361 cmd->header.cmd_no); 1362 break; 1363 } 1364 } 1365 1366 static void kvaser_usb_hydra_handle_cmd(const struct kvaser_usb *dev, 1367 const struct kvaser_cmd *cmd) 1368 { 1369 if (cmd->header.cmd_no == CMD_EXTENDED) 1370 kvaser_usb_hydra_handle_cmd_ext 1371 (dev, (struct kvaser_cmd_ext *)cmd); 1372 else 1373 kvaser_usb_hydra_handle_cmd_std(dev, cmd); 1374 } 1375 1376 static void * 1377 kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv, 1378 const struct sk_buff *skb, int *cmd_len, 1379 u16 transid) 1380 { 1381 struct kvaser_usb *dev = priv->dev; 1382 struct kvaser_cmd_ext *cmd; 1383 struct canfd_frame *cf = (struct canfd_frame *)skb->data; 1384 u8 dlc = can_fd_len2dlc(cf->len); 1385 u8 nbr_of_bytes = cf->len; 1386 u32 flags; 1387 u32 id; 1388 u32 kcan_id; 1389 u32 kcan_header; 1390 1391 cmd = kcalloc(1, sizeof(struct kvaser_cmd_ext), GFP_ATOMIC); 1392 if (!cmd) 1393 return NULL; 1394 1395 kvaser_usb_hydra_set_cmd_dest_he 1396 ((struct kvaser_cmd *)cmd, 1397 dev->card_data.hydra.channel_to_he[priv->channel]); 1398 kvaser_usb_hydra_set_cmd_transid((struct kvaser_cmd *)cmd, transid); 1399 1400 cmd->header.cmd_no = CMD_EXTENDED; 1401 cmd->cmd_no_ext = CMD_TX_CAN_MESSAGE_FD; 1402 1403 *cmd_len = ALIGN(sizeof(struct kvaser_cmd_ext) - 1404 sizeof(cmd->tx_can.kcan_payload) + nbr_of_bytes, 1405 8); 1406 1407 cmd->len = cpu_to_le16(*cmd_len); 1408 1409 cmd->tx_can.databytes = nbr_of_bytes; 1410 cmd->tx_can.dlc = dlc; 1411 1412 if (cf->can_id & CAN_EFF_FLAG) { 1413 id = cf->can_id & CAN_EFF_MASK; 1414 flags = KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID; 1415 kcan_id = (cf->can_id & CAN_EFF_MASK) | 1416 KVASER_USB_KCAN_DATA_IDE | KVASER_USB_KCAN_DATA_SRR; 1417 } else { 1418 id = cf->can_id & CAN_SFF_MASK; 1419 flags = 0; 1420 kcan_id = cf->can_id & CAN_SFF_MASK; 1421 } 1422 1423 if (cf->can_id & CAN_ERR_FLAG) 1424 flags |= KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME; 1425 1426 kcan_header = ((dlc << KVASER_USB_KCAN_DATA_DLC_SHIFT) & 1427 KVASER_USB_KCAN_DATA_DLC_MASK) | 1428 KVASER_USB_KCAN_DATA_AREQ | 1429 (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT ? 1430 KVASER_USB_KCAN_DATA_OSM : 0); 1431 1432 if (can_is_canfd_skb(skb)) { 1433 kcan_header |= KVASER_USB_KCAN_DATA_FDF | 1434 (cf->flags & CANFD_BRS ? 1435 KVASER_USB_KCAN_DATA_BRS : 0); 1436 } else { 1437 if (cf->can_id & CAN_RTR_FLAG) { 1438 kcan_id |= KVASER_USB_KCAN_DATA_RTR; 1439 cmd->tx_can.databytes = 0; 1440 flags |= KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME; 1441 } 1442 } 1443 1444 cmd->tx_can.kcan_id = cpu_to_le32(kcan_id); 1445 cmd->tx_can.id = cpu_to_le32(id); 1446 cmd->tx_can.flags = cpu_to_le32(flags); 1447 cmd->tx_can.kcan_header = cpu_to_le32(kcan_header); 1448 1449 memcpy(cmd->tx_can.kcan_payload, cf->data, nbr_of_bytes); 1450 1451 return cmd; 1452 } 1453 1454 static void * 1455 kvaser_usb_hydra_frame_to_cmd_std(const struct kvaser_usb_net_priv *priv, 1456 const struct sk_buff *skb, int *cmd_len, 1457 u16 transid) 1458 { 1459 struct kvaser_usb *dev = priv->dev; 1460 struct kvaser_cmd *cmd; 1461 struct can_frame *cf = (struct can_frame *)skb->data; 1462 u32 flags; 1463 u32 id; 1464 1465 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_ATOMIC); 1466 if (!cmd) 1467 return NULL; 1468 1469 kvaser_usb_hydra_set_cmd_dest_he 1470 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1471 kvaser_usb_hydra_set_cmd_transid(cmd, transid); 1472 1473 cmd->header.cmd_no = CMD_TX_CAN_MESSAGE; 1474 1475 *cmd_len = ALIGN(sizeof(struct kvaser_cmd), 8); 1476 1477 if (cf->can_id & CAN_EFF_FLAG) { 1478 id = (cf->can_id & CAN_EFF_MASK); 1479 id |= KVASER_USB_HYDRA_EXTENDED_FRAME_ID; 1480 } else { 1481 id = cf->can_id & CAN_SFF_MASK; 1482 } 1483 1484 cmd->tx_can.dlc = cf->len; 1485 1486 flags = (cf->can_id & CAN_EFF_FLAG ? 1487 KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID : 0); 1488 1489 if (cf->can_id & CAN_RTR_FLAG) 1490 flags |= KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME; 1491 1492 flags |= (cf->can_id & CAN_ERR_FLAG ? 1493 KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME : 0); 1494 1495 cmd->tx_can.id = cpu_to_le32(id); 1496 cmd->tx_can.flags = flags; 1497 1498 memcpy(cmd->tx_can.data, cf->data, cf->len); 1499 1500 return cmd; 1501 } 1502 1503 static int kvaser_usb_hydra_set_mode(struct net_device *netdev, 1504 enum can_mode mode) 1505 { 1506 int err = 0; 1507 1508 switch (mode) { 1509 case CAN_MODE_START: 1510 /* CAN controller automatically recovers from BUS_OFF */ 1511 break; 1512 default: 1513 err = -EOPNOTSUPP; 1514 } 1515 1516 return err; 1517 } 1518 1519 static int kvaser_usb_hydra_set_bittiming(struct net_device *netdev) 1520 { 1521 struct kvaser_cmd *cmd; 1522 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 1523 struct can_bittiming *bt = &priv->can.bittiming; 1524 struct kvaser_usb *dev = priv->dev; 1525 int tseg1 = bt->prop_seg + bt->phase_seg1; 1526 int tseg2 = bt->phase_seg2; 1527 int sjw = bt->sjw; 1528 int err; 1529 1530 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 1531 if (!cmd) 1532 return -ENOMEM; 1533 1534 cmd->header.cmd_no = CMD_SET_BUSPARAMS_REQ; 1535 cmd->set_busparams_req.bitrate = cpu_to_le32(bt->bitrate); 1536 cmd->set_busparams_req.sjw = (u8)sjw; 1537 cmd->set_busparams_req.tseg1 = (u8)tseg1; 1538 cmd->set_busparams_req.tseg2 = (u8)tseg2; 1539 cmd->set_busparams_req.nsamples = 1; 1540 1541 kvaser_usb_hydra_set_cmd_dest_he 1542 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1543 kvaser_usb_hydra_set_cmd_transid 1544 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1545 1546 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1547 1548 kfree(cmd); 1549 1550 return err; 1551 } 1552 1553 static int kvaser_usb_hydra_set_data_bittiming(struct net_device *netdev) 1554 { 1555 struct kvaser_cmd *cmd; 1556 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 1557 struct can_bittiming *dbt = &priv->can.data_bittiming; 1558 struct kvaser_usb *dev = priv->dev; 1559 int tseg1 = dbt->prop_seg + dbt->phase_seg1; 1560 int tseg2 = dbt->phase_seg2; 1561 int sjw = dbt->sjw; 1562 int err; 1563 1564 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 1565 if (!cmd) 1566 return -ENOMEM; 1567 1568 cmd->header.cmd_no = CMD_SET_BUSPARAMS_FD_REQ; 1569 cmd->set_busparams_req.bitrate_d = cpu_to_le32(dbt->bitrate); 1570 cmd->set_busparams_req.sjw_d = (u8)sjw; 1571 cmd->set_busparams_req.tseg1_d = (u8)tseg1; 1572 cmd->set_busparams_req.tseg2_d = (u8)tseg2; 1573 cmd->set_busparams_req.nsamples_d = 1; 1574 1575 if (priv->can.ctrlmode & CAN_CTRLMODE_FD) { 1576 if (priv->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) 1577 cmd->set_busparams_req.canfd_mode = 1578 KVASER_USB_HYDRA_BUS_MODE_NONISO; 1579 else 1580 cmd->set_busparams_req.canfd_mode = 1581 KVASER_USB_HYDRA_BUS_MODE_CANFD_ISO; 1582 } 1583 1584 kvaser_usb_hydra_set_cmd_dest_he 1585 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1586 kvaser_usb_hydra_set_cmd_transid 1587 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1588 1589 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1590 1591 kfree(cmd); 1592 1593 return err; 1594 } 1595 1596 static int kvaser_usb_hydra_get_berr_counter(const struct net_device *netdev, 1597 struct can_berr_counter *bec) 1598 { 1599 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 1600 int err; 1601 1602 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, 1603 CMD_GET_CHIP_STATE_REQ, 1604 priv->channel); 1605 if (err) 1606 return err; 1607 1608 *bec = priv->bec; 1609 1610 return 0; 1611 } 1612 1613 static int kvaser_usb_hydra_setup_endpoints(struct kvaser_usb *dev) 1614 { 1615 const struct usb_host_interface *iface_desc; 1616 struct usb_endpoint_descriptor *ep; 1617 int i; 1618 1619 iface_desc = dev->intf->cur_altsetting; 1620 1621 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 1622 ep = &iface_desc->endpoint[i].desc; 1623 1624 if (!dev->bulk_in && usb_endpoint_is_bulk_in(ep) && 1625 ep->bEndpointAddress == KVASER_USB_HYDRA_BULK_EP_IN_ADDR) 1626 dev->bulk_in = ep; 1627 1628 if (!dev->bulk_out && usb_endpoint_is_bulk_out(ep) && 1629 ep->bEndpointAddress == KVASER_USB_HYDRA_BULK_EP_OUT_ADDR) 1630 dev->bulk_out = ep; 1631 1632 if (dev->bulk_in && dev->bulk_out) 1633 return 0; 1634 } 1635 1636 return -ENODEV; 1637 } 1638 1639 static int kvaser_usb_hydra_init_card(struct kvaser_usb *dev) 1640 { 1641 int err; 1642 unsigned int i; 1643 struct kvaser_usb_dev_card_data_hydra *card_data = 1644 &dev->card_data.hydra; 1645 1646 card_data->transid = KVASER_USB_HYDRA_MIN_TRANSID; 1647 spin_lock_init(&card_data->transid_lock); 1648 1649 memset(card_data->usb_rx_leftover, 0, KVASER_USB_HYDRA_MAX_CMD_LEN); 1650 card_data->usb_rx_leftover_len = 0; 1651 spin_lock_init(&card_data->usb_rx_leftover_lock); 1652 1653 memset(card_data->channel_to_he, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL, 1654 sizeof(card_data->channel_to_he)); 1655 card_data->sysdbg_he = 0; 1656 1657 for (i = 0; i < KVASER_USB_MAX_NET_DEVICES; i++) { 1658 err = kvaser_usb_hydra_map_channel 1659 (dev, 1660 (KVASER_USB_HYDRA_TRANSID_CANHE | i), 1661 i, "CAN"); 1662 if (err) { 1663 dev_err(&dev->intf->dev, 1664 "CMD_MAP_CHANNEL_REQ failed for CAN%u\n", i); 1665 return err; 1666 } 1667 } 1668 1669 err = kvaser_usb_hydra_map_channel(dev, KVASER_USB_HYDRA_TRANSID_SYSDBG, 1670 0, "SYSDBG"); 1671 if (err) { 1672 dev_err(&dev->intf->dev, 1673 "CMD_MAP_CHANNEL_REQ failed for SYSDBG\n"); 1674 return err; 1675 } 1676 1677 return 0; 1678 } 1679 1680 static int kvaser_usb_hydra_get_software_info(struct kvaser_usb *dev) 1681 { 1682 struct kvaser_cmd cmd; 1683 int err; 1684 1685 err = kvaser_usb_hydra_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO_REQ, 1686 -1); 1687 if (err) 1688 return err; 1689 1690 memset(&cmd, 0, sizeof(struct kvaser_cmd)); 1691 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_RESP, &cmd); 1692 if (err) 1693 return err; 1694 1695 dev->max_tx_urbs = min_t(unsigned int, KVASER_USB_MAX_TX_URBS, 1696 le16_to_cpu(cmd.sw_info.max_outstanding_tx)); 1697 1698 return 0; 1699 } 1700 1701 static int kvaser_usb_hydra_get_software_details(struct kvaser_usb *dev) 1702 { 1703 struct kvaser_cmd *cmd; 1704 int err; 1705 u32 flags; 1706 struct kvaser_usb_dev_card_data *card_data = &dev->card_data; 1707 1708 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 1709 if (!cmd) 1710 return -ENOMEM; 1711 1712 cmd->header.cmd_no = CMD_GET_SOFTWARE_DETAILS_REQ; 1713 cmd->sw_detail_req.use_ext_cmd = 1; 1714 kvaser_usb_hydra_set_cmd_dest_he 1715 (cmd, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL); 1716 1717 kvaser_usb_hydra_set_cmd_transid 1718 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1719 1720 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1721 if (err) 1722 goto end; 1723 1724 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_SOFTWARE_DETAILS_RESP, 1725 cmd); 1726 if (err) 1727 goto end; 1728 1729 dev->fw_version = le32_to_cpu(cmd->sw_detail_res.sw_version); 1730 flags = le32_to_cpu(cmd->sw_detail_res.sw_flags); 1731 1732 if (flags & KVASER_USB_HYDRA_SW_FLAG_FW_BAD) { 1733 dev_err(&dev->intf->dev, 1734 "Bad firmware, device refuse to run!\n"); 1735 err = -EINVAL; 1736 goto end; 1737 } 1738 1739 if (flags & KVASER_USB_HYDRA_SW_FLAG_FW_BETA) 1740 dev_info(&dev->intf->dev, "Beta firmware in use\n"); 1741 1742 if (flags & KVASER_USB_HYDRA_SW_FLAG_EXT_CAP) 1743 card_data->capabilities |= KVASER_USB_CAP_EXT_CAP; 1744 1745 if (flags & KVASER_USB_HYDRA_SW_FLAG_EXT_CMD) 1746 card_data->capabilities |= KVASER_USB_HYDRA_CAP_EXT_CMD; 1747 1748 if (flags & KVASER_USB_HYDRA_SW_FLAG_CANFD) 1749 card_data->ctrlmode_supported |= CAN_CTRLMODE_FD; 1750 1751 if (flags & KVASER_USB_HYDRA_SW_FLAG_NONISO) 1752 card_data->ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO; 1753 1754 if (flags & KVASER_USB_HYDRA_SW_FLAG_FREQ_80M) 1755 dev->cfg = &kvaser_usb_hydra_dev_cfg_kcan; 1756 else if (flags & KVASER_USB_HYDRA_SW_FLAG_CAN_FREQ_80M) 1757 dev->cfg = &kvaser_usb_hydra_dev_cfg_rt; 1758 else 1759 dev->cfg = &kvaser_usb_hydra_dev_cfg_flexc; 1760 1761 end: 1762 kfree(cmd); 1763 1764 return err; 1765 } 1766 1767 static int kvaser_usb_hydra_get_card_info(struct kvaser_usb *dev) 1768 { 1769 struct kvaser_cmd cmd; 1770 int err; 1771 1772 err = kvaser_usb_hydra_send_simple_cmd(dev, CMD_GET_CARD_INFO_REQ, -1); 1773 if (err) 1774 return err; 1775 1776 memset(&cmd, 0, sizeof(struct kvaser_cmd)); 1777 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_CARD_INFO_RESP, &cmd); 1778 if (err) 1779 return err; 1780 1781 dev->nchannels = cmd.card_info.nchannels; 1782 if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES) 1783 return -EINVAL; 1784 1785 return 0; 1786 } 1787 1788 static int kvaser_usb_hydra_get_capabilities(struct kvaser_usb *dev) 1789 { 1790 int err; 1791 u16 status; 1792 1793 if (!(dev->card_data.capabilities & KVASER_USB_CAP_EXT_CAP)) { 1794 dev_info(&dev->intf->dev, 1795 "No extended capability support. Upgrade your device.\n"); 1796 return 0; 1797 } 1798 1799 err = kvaser_usb_hydra_get_single_capability 1800 (dev, 1801 KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE, 1802 &status); 1803 if (err) 1804 return err; 1805 if (status) 1806 dev_info(&dev->intf->dev, 1807 "KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE failed %u\n", 1808 status); 1809 1810 err = kvaser_usb_hydra_get_single_capability 1811 (dev, 1812 KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT, 1813 &status); 1814 if (err) 1815 return err; 1816 if (status) 1817 dev_info(&dev->intf->dev, 1818 "KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT failed %u\n", 1819 status); 1820 1821 err = kvaser_usb_hydra_get_single_capability 1822 (dev, KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT, 1823 &status); 1824 if (err) 1825 return err; 1826 if (status) 1827 dev_info(&dev->intf->dev, 1828 "KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT failed %u\n", 1829 status); 1830 1831 return 0; 1832 } 1833 1834 static int kvaser_usb_hydra_set_opt_mode(const struct kvaser_usb_net_priv *priv) 1835 { 1836 struct kvaser_usb *dev = priv->dev; 1837 struct kvaser_cmd *cmd; 1838 int err; 1839 1840 if ((priv->can.ctrlmode & 1841 (CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO)) == 1842 CAN_CTRLMODE_FD_NON_ISO) { 1843 netdev_warn(priv->netdev, 1844 "CTRLMODE_FD shall be on if CTRLMODE_FD_NON_ISO is on\n"); 1845 return -EINVAL; 1846 } 1847 1848 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 1849 if (!cmd) 1850 return -ENOMEM; 1851 1852 cmd->header.cmd_no = CMD_SET_DRIVERMODE_REQ; 1853 kvaser_usb_hydra_set_cmd_dest_he 1854 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1855 kvaser_usb_hydra_set_cmd_transid 1856 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1857 if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) 1858 cmd->set_ctrlmode.mode = KVASER_USB_HYDRA_CTRLMODE_LISTEN; 1859 else 1860 cmd->set_ctrlmode.mode = KVASER_USB_HYDRA_CTRLMODE_NORMAL; 1861 1862 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1863 kfree(cmd); 1864 1865 return err; 1866 } 1867 1868 static int kvaser_usb_hydra_start_chip(struct kvaser_usb_net_priv *priv) 1869 { 1870 int err; 1871 1872 init_completion(&priv->start_comp); 1873 1874 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_START_CHIP_REQ, 1875 priv->channel); 1876 if (err) 1877 return err; 1878 1879 if (!wait_for_completion_timeout(&priv->start_comp, 1880 msecs_to_jiffies(KVASER_USB_TIMEOUT))) 1881 return -ETIMEDOUT; 1882 1883 return 0; 1884 } 1885 1886 static int kvaser_usb_hydra_stop_chip(struct kvaser_usb_net_priv *priv) 1887 { 1888 int err; 1889 1890 init_completion(&priv->stop_comp); 1891 1892 /* Make sure we do not report invalid BUS_OFF from CMD_CHIP_STATE_EVENT 1893 * see comment in kvaser_usb_hydra_update_state() 1894 */ 1895 priv->can.state = CAN_STATE_STOPPED; 1896 1897 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_STOP_CHIP_REQ, 1898 priv->channel); 1899 if (err) 1900 return err; 1901 1902 if (!wait_for_completion_timeout(&priv->stop_comp, 1903 msecs_to_jiffies(KVASER_USB_TIMEOUT))) 1904 return -ETIMEDOUT; 1905 1906 return 0; 1907 } 1908 1909 static int kvaser_usb_hydra_flush_queue(struct kvaser_usb_net_priv *priv) 1910 { 1911 int err; 1912 1913 init_completion(&priv->flush_comp); 1914 1915 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_FLUSH_QUEUE, 1916 priv->channel); 1917 if (err) 1918 return err; 1919 1920 if (!wait_for_completion_timeout(&priv->flush_comp, 1921 msecs_to_jiffies(KVASER_USB_TIMEOUT))) 1922 return -ETIMEDOUT; 1923 1924 return 0; 1925 } 1926 1927 /* A single extended hydra command can be transmitted in multiple transfers 1928 * We have to buffer partial hydra commands, and handle them on next callback. 1929 */ 1930 static void kvaser_usb_hydra_read_bulk_callback(struct kvaser_usb *dev, 1931 void *buf, int len) 1932 { 1933 unsigned long irq_flags; 1934 struct kvaser_cmd *cmd; 1935 int pos = 0; 1936 size_t cmd_len; 1937 struct kvaser_usb_dev_card_data_hydra *card_data = 1938 &dev->card_data.hydra; 1939 int usb_rx_leftover_len; 1940 spinlock_t *usb_rx_leftover_lock = &card_data->usb_rx_leftover_lock; 1941 1942 spin_lock_irqsave(usb_rx_leftover_lock, irq_flags); 1943 usb_rx_leftover_len = card_data->usb_rx_leftover_len; 1944 if (usb_rx_leftover_len) { 1945 int remaining_bytes; 1946 1947 cmd = (struct kvaser_cmd *)card_data->usb_rx_leftover; 1948 1949 cmd_len = kvaser_usb_hydra_cmd_size(cmd); 1950 1951 remaining_bytes = min_t(unsigned int, len, 1952 cmd_len - usb_rx_leftover_len); 1953 /* Make sure we do not overflow usb_rx_leftover */ 1954 if (remaining_bytes + usb_rx_leftover_len > 1955 KVASER_USB_HYDRA_MAX_CMD_LEN) { 1956 dev_err(&dev->intf->dev, "Format error\n"); 1957 spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); 1958 return; 1959 } 1960 1961 memcpy(card_data->usb_rx_leftover + usb_rx_leftover_len, buf, 1962 remaining_bytes); 1963 pos += remaining_bytes; 1964 1965 if (remaining_bytes + usb_rx_leftover_len == cmd_len) { 1966 kvaser_usb_hydra_handle_cmd(dev, cmd); 1967 usb_rx_leftover_len = 0; 1968 } else { 1969 /* Command still not complete */ 1970 usb_rx_leftover_len += remaining_bytes; 1971 } 1972 card_data->usb_rx_leftover_len = usb_rx_leftover_len; 1973 } 1974 spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); 1975 1976 while (pos < len) { 1977 cmd = buf + pos; 1978 1979 cmd_len = kvaser_usb_hydra_cmd_size(cmd); 1980 1981 if (pos + cmd_len > len) { 1982 /* We got first part of a command */ 1983 int leftover_bytes; 1984 1985 leftover_bytes = len - pos; 1986 /* Make sure we do not overflow usb_rx_leftover */ 1987 if (leftover_bytes > KVASER_USB_HYDRA_MAX_CMD_LEN) { 1988 dev_err(&dev->intf->dev, "Format error\n"); 1989 return; 1990 } 1991 spin_lock_irqsave(usb_rx_leftover_lock, irq_flags); 1992 memcpy(card_data->usb_rx_leftover, buf + pos, 1993 leftover_bytes); 1994 card_data->usb_rx_leftover_len = leftover_bytes; 1995 spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); 1996 break; 1997 } 1998 1999 kvaser_usb_hydra_handle_cmd(dev, cmd); 2000 pos += cmd_len; 2001 } 2002 } 2003 2004 static void * 2005 kvaser_usb_hydra_frame_to_cmd(const struct kvaser_usb_net_priv *priv, 2006 const struct sk_buff *skb, int *cmd_len, 2007 u16 transid) 2008 { 2009 void *buf; 2010 2011 if (priv->dev->card_data.capabilities & KVASER_USB_HYDRA_CAP_EXT_CMD) 2012 buf = kvaser_usb_hydra_frame_to_cmd_ext(priv, skb, cmd_len, 2013 transid); 2014 else 2015 buf = kvaser_usb_hydra_frame_to_cmd_std(priv, skb, cmd_len, 2016 transid); 2017 2018 return buf; 2019 } 2020 2021 const struct kvaser_usb_dev_ops kvaser_usb_hydra_dev_ops = { 2022 .dev_set_mode = kvaser_usb_hydra_set_mode, 2023 .dev_set_bittiming = kvaser_usb_hydra_set_bittiming, 2024 .dev_set_data_bittiming = kvaser_usb_hydra_set_data_bittiming, 2025 .dev_get_berr_counter = kvaser_usb_hydra_get_berr_counter, 2026 .dev_setup_endpoints = kvaser_usb_hydra_setup_endpoints, 2027 .dev_init_card = kvaser_usb_hydra_init_card, 2028 .dev_get_software_info = kvaser_usb_hydra_get_software_info, 2029 .dev_get_software_details = kvaser_usb_hydra_get_software_details, 2030 .dev_get_card_info = kvaser_usb_hydra_get_card_info, 2031 .dev_get_capabilities = kvaser_usb_hydra_get_capabilities, 2032 .dev_set_opt_mode = kvaser_usb_hydra_set_opt_mode, 2033 .dev_start_chip = kvaser_usb_hydra_start_chip, 2034 .dev_stop_chip = kvaser_usb_hydra_stop_chip, 2035 .dev_reset_chip = NULL, 2036 .dev_flush_queue = kvaser_usb_hydra_flush_queue, 2037 .dev_read_bulk_callback = kvaser_usb_hydra_read_bulk_callback, 2038 .dev_frame_to_cmd = kvaser_usb_hydra_frame_to_cmd, 2039 }; 2040 2041 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_kcan = { 2042 .clock = { 2043 .freq = 80 * MEGA /* Hz */, 2044 }, 2045 .timestamp_freq = 80, 2046 .bittiming_const = &kvaser_usb_hydra_kcan_bittiming_c, 2047 .data_bittiming_const = &kvaser_usb_hydra_kcan_bittiming_c, 2048 }; 2049 2050 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_flexc = { 2051 .clock = { 2052 .freq = 24 * MEGA /* Hz */, 2053 }, 2054 .timestamp_freq = 1, 2055 .bittiming_const = &kvaser_usb_flexc_bittiming_const, 2056 }; 2057 2058 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_rt = { 2059 .clock = { 2060 .freq = 80 * MEGA /* Hz */, 2061 }, 2062 .timestamp_freq = 24, 2063 .bittiming_const = &kvaser_usb_hydra_rt_bittiming_c, 2064 .data_bittiming_const = &kvaser_usb_hydra_rtd_bittiming_c, 2065 }; 2066