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/usb.h> 26 27 #include <linux/can.h> 28 #include <linux/can/dev.h> 29 #include <linux/can/error.h> 30 #include <linux/can/netlink.h> 31 32 #include "kvaser_usb.h" 33 34 /* Forward declarations */ 35 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_kcan; 36 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_flexc; 37 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_rt; 38 39 #define KVASER_USB_HYDRA_BULK_EP_IN_ADDR 0x82 40 #define KVASER_USB_HYDRA_BULK_EP_OUT_ADDR 0x02 41 42 #define KVASER_USB_HYDRA_MAX_TRANSID 0xff 43 #define KVASER_USB_HYDRA_MIN_TRANSID 0x01 44 45 /* Minihydra command IDs */ 46 #define CMD_SET_BUSPARAMS_REQ 16 47 #define CMD_GET_CHIP_STATE_REQ 19 48 #define CMD_CHIP_STATE_EVENT 20 49 #define CMD_SET_DRIVERMODE_REQ 21 50 #define CMD_START_CHIP_REQ 26 51 #define CMD_START_CHIP_RESP 27 52 #define CMD_STOP_CHIP_REQ 28 53 #define CMD_STOP_CHIP_RESP 29 54 #define CMD_TX_CAN_MESSAGE 33 55 #define CMD_GET_CARD_INFO_REQ 34 56 #define CMD_GET_CARD_INFO_RESP 35 57 #define CMD_GET_SOFTWARE_INFO_REQ 38 58 #define CMD_GET_SOFTWARE_INFO_RESP 39 59 #define CMD_ERROR_EVENT 45 60 #define CMD_FLUSH_QUEUE 48 61 #define CMD_TX_ACKNOWLEDGE 50 62 #define CMD_FLUSH_QUEUE_RESP 66 63 #define CMD_SET_BUSPARAMS_FD_REQ 69 64 #define CMD_SET_BUSPARAMS_FD_RESP 70 65 #define CMD_SET_BUSPARAMS_RESP 85 66 #define CMD_GET_CAPABILITIES_REQ 95 67 #define CMD_GET_CAPABILITIES_RESP 96 68 #define CMD_RX_MESSAGE 106 69 #define CMD_MAP_CHANNEL_REQ 200 70 #define CMD_MAP_CHANNEL_RESP 201 71 #define CMD_GET_SOFTWARE_DETAILS_REQ 202 72 #define CMD_GET_SOFTWARE_DETAILS_RESP 203 73 #define CMD_EXTENDED 255 74 75 /* Minihydra extended command IDs */ 76 #define CMD_TX_CAN_MESSAGE_FD 224 77 #define CMD_TX_ACKNOWLEDGE_FD 225 78 #define CMD_RX_MESSAGE_FD 226 79 80 /* Hydra commands are handled by different threads in firmware. 81 * The threads are denoted hydra entity (HE). Each HE got a unique 6-bit 82 * address. The address is used in hydra commands to get/set source and 83 * destination HE. There are two predefined HE addresses, the remaining 84 * addresses are different between devices and firmware versions. Hence, we need 85 * to enumerate the addresses (see kvaser_usb_hydra_map_channel()). 86 */ 87 88 /* Well-known HE addresses */ 89 #define KVASER_USB_HYDRA_HE_ADDRESS_ROUTER 0x00 90 #define KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL 0x3e 91 92 #define KVASER_USB_HYDRA_TRANSID_CANHE 0x40 93 #define KVASER_USB_HYDRA_TRANSID_SYSDBG 0x61 94 95 struct kvaser_cmd_map_ch_req { 96 char name[16]; 97 u8 channel; 98 u8 reserved[11]; 99 } __packed; 100 101 struct kvaser_cmd_map_ch_res { 102 u8 he_addr; 103 u8 channel; 104 u8 reserved[26]; 105 } __packed; 106 107 struct kvaser_cmd_card_info { 108 __le32 serial_number; 109 __le32 clock_res; 110 __le32 mfg_date; 111 __le32 ean[2]; 112 u8 hw_version; 113 u8 usb_mode; 114 u8 hw_type; 115 u8 reserved0; 116 u8 nchannels; 117 u8 reserved1[3]; 118 } __packed; 119 120 struct kvaser_cmd_sw_info { 121 u8 reserved0[8]; 122 __le16 max_outstanding_tx; 123 u8 reserved1[18]; 124 } __packed; 125 126 struct kvaser_cmd_sw_detail_req { 127 u8 use_ext_cmd; 128 u8 reserved[27]; 129 } __packed; 130 131 /* Software detail flags */ 132 #define KVASER_USB_HYDRA_SW_FLAG_FW_BETA BIT(2) 133 #define KVASER_USB_HYDRA_SW_FLAG_FW_BAD BIT(4) 134 #define KVASER_USB_HYDRA_SW_FLAG_FREQ_80M BIT(5) 135 #define KVASER_USB_HYDRA_SW_FLAG_EXT_CMD BIT(9) 136 #define KVASER_USB_HYDRA_SW_FLAG_CANFD BIT(10) 137 #define KVASER_USB_HYDRA_SW_FLAG_NONISO BIT(11) 138 #define KVASER_USB_HYDRA_SW_FLAG_EXT_CAP BIT(12) 139 #define KVASER_USB_HYDRA_SW_FLAG_CAN_FREQ_80M BIT(13) 140 struct kvaser_cmd_sw_detail_res { 141 __le32 sw_flags; 142 __le32 sw_version; 143 __le32 sw_name; 144 __le32 ean[2]; 145 __le32 max_bitrate; 146 u8 reserved[4]; 147 } __packed; 148 149 /* Sub commands for cap_req and cap_res */ 150 #define KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE 0x02 151 #define KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT 0x05 152 #define KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT 0x06 153 struct kvaser_cmd_cap_req { 154 __le16 cap_cmd; 155 u8 reserved[26]; 156 } __packed; 157 158 /* Status codes for cap_res */ 159 #define KVASER_USB_HYDRA_CAP_STAT_OK 0x00 160 #define KVASER_USB_HYDRA_CAP_STAT_NOT_IMPL 0x01 161 #define KVASER_USB_HYDRA_CAP_STAT_UNAVAIL 0x02 162 struct kvaser_cmd_cap_res { 163 __le16 cap_cmd; 164 __le16 status; 165 __le32 mask; 166 __le32 value; 167 u8 reserved[16]; 168 } __packed; 169 170 /* CMD_ERROR_EVENT error codes */ 171 #define KVASER_USB_HYDRA_ERROR_EVENT_CAN 0x01 172 #define KVASER_USB_HYDRA_ERROR_EVENT_PARAM 0x09 173 struct kvaser_cmd_error_event { 174 __le16 timestamp[3]; 175 u8 reserved; 176 u8 error_code; 177 __le16 info1; 178 __le16 info2; 179 } __packed; 180 181 /* Chip state status flags. Used for chip_state_event and err_frame_data. */ 182 #define KVASER_USB_HYDRA_BUS_ERR_ACT 0x00 183 #define KVASER_USB_HYDRA_BUS_ERR_PASS BIT(5) 184 #define KVASER_USB_HYDRA_BUS_BUS_OFF BIT(6) 185 struct kvaser_cmd_chip_state_event { 186 __le16 timestamp[3]; 187 u8 tx_err_counter; 188 u8 rx_err_counter; 189 u8 bus_status; 190 u8 reserved[19]; 191 } __packed; 192 193 /* Busparam modes */ 194 #define KVASER_USB_HYDRA_BUS_MODE_CAN 0x00 195 #define KVASER_USB_HYDRA_BUS_MODE_CANFD_ISO 0x01 196 #define KVASER_USB_HYDRA_BUS_MODE_NONISO 0x02 197 struct kvaser_cmd_set_busparams { 198 __le32 bitrate; 199 u8 tseg1; 200 u8 tseg2; 201 u8 sjw; 202 u8 nsamples; 203 u8 reserved0[4]; 204 __le32 bitrate_d; 205 u8 tseg1_d; 206 u8 tseg2_d; 207 u8 sjw_d; 208 u8 nsamples_d; 209 u8 canfd_mode; 210 u8 reserved1[7]; 211 } __packed; 212 213 /* Ctrl modes */ 214 #define KVASER_USB_HYDRA_CTRLMODE_NORMAL 0x01 215 #define KVASER_USB_HYDRA_CTRLMODE_LISTEN 0x02 216 struct kvaser_cmd_set_ctrlmode { 217 u8 mode; 218 u8 reserved[27]; 219 } __packed; 220 221 struct kvaser_err_frame_data { 222 u8 bus_status; 223 u8 reserved0; 224 u8 tx_err_counter; 225 u8 rx_err_counter; 226 u8 reserved1[4]; 227 } __packed; 228 229 struct kvaser_cmd_rx_can { 230 u8 cmd_len; 231 u8 cmd_no; 232 u8 channel; 233 u8 flags; 234 __le16 timestamp[3]; 235 u8 dlc; 236 u8 padding; 237 __le32 id; 238 union { 239 u8 data[8]; 240 struct kvaser_err_frame_data err_frame_data; 241 }; 242 } __packed; 243 244 /* Extended CAN ID flag. Used in rx_can and tx_can */ 245 #define KVASER_USB_HYDRA_EXTENDED_FRAME_ID BIT(31) 246 struct kvaser_cmd_tx_can { 247 __le32 id; 248 u8 data[8]; 249 u8 dlc; 250 u8 flags; 251 __le16 transid; 252 u8 channel; 253 u8 reserved[11]; 254 } __packed; 255 256 struct kvaser_cmd_header { 257 u8 cmd_no; 258 /* The destination HE address is stored in 0..5 of he_addr. 259 * The upper part of source HE address is stored in 6..7 of he_addr, and 260 * the lower part is stored in 12..15 of transid. 261 */ 262 u8 he_addr; 263 __le16 transid; 264 } __packed; 265 266 struct kvaser_cmd { 267 struct kvaser_cmd_header header; 268 union { 269 struct kvaser_cmd_map_ch_req map_ch_req; 270 struct kvaser_cmd_map_ch_res map_ch_res; 271 272 struct kvaser_cmd_card_info card_info; 273 struct kvaser_cmd_sw_info sw_info; 274 struct kvaser_cmd_sw_detail_req sw_detail_req; 275 struct kvaser_cmd_sw_detail_res sw_detail_res; 276 277 struct kvaser_cmd_cap_req cap_req; 278 struct kvaser_cmd_cap_res cap_res; 279 280 struct kvaser_cmd_error_event error_event; 281 282 struct kvaser_cmd_set_busparams set_busparams_req; 283 284 struct kvaser_cmd_chip_state_event chip_state_event; 285 286 struct kvaser_cmd_set_ctrlmode set_ctrlmode; 287 288 struct kvaser_cmd_rx_can rx_can; 289 struct kvaser_cmd_tx_can tx_can; 290 } __packed; 291 } __packed; 292 293 /* CAN frame flags. Used in rx_can, ext_rx_can, tx_can and ext_tx_can */ 294 #define KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME BIT(0) 295 #define KVASER_USB_HYDRA_CF_FLAG_OVERRUN BIT(1) 296 #define KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME BIT(4) 297 #define KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID BIT(5) 298 /* CAN frame flags. Used in ext_rx_can and ext_tx_can */ 299 #define KVASER_USB_HYDRA_CF_FLAG_OSM_NACK BIT(12) 300 #define KVASER_USB_HYDRA_CF_FLAG_ABL BIT(13) 301 #define KVASER_USB_HYDRA_CF_FLAG_FDF BIT(16) 302 #define KVASER_USB_HYDRA_CF_FLAG_BRS BIT(17) 303 #define KVASER_USB_HYDRA_CF_FLAG_ESI BIT(18) 304 305 /* KCAN packet header macros. Used in ext_rx_can and ext_tx_can */ 306 #define KVASER_USB_KCAN_DATA_DLC_BITS 4 307 #define KVASER_USB_KCAN_DATA_DLC_SHIFT 8 308 #define KVASER_USB_KCAN_DATA_DLC_MASK \ 309 GENMASK(KVASER_USB_KCAN_DATA_DLC_BITS - 1 + \ 310 KVASER_USB_KCAN_DATA_DLC_SHIFT, \ 311 KVASER_USB_KCAN_DATA_DLC_SHIFT) 312 313 #define KVASER_USB_KCAN_DATA_BRS BIT(14) 314 #define KVASER_USB_KCAN_DATA_FDF BIT(15) 315 #define KVASER_USB_KCAN_DATA_OSM BIT(16) 316 #define KVASER_USB_KCAN_DATA_AREQ BIT(31) 317 #define KVASER_USB_KCAN_DATA_SRR BIT(31) 318 #define KVASER_USB_KCAN_DATA_RTR BIT(29) 319 #define KVASER_USB_KCAN_DATA_IDE BIT(30) 320 struct kvaser_cmd_ext_rx_can { 321 __le32 flags; 322 __le32 id; 323 __le32 kcan_id; 324 __le32 kcan_header; 325 __le64 timestamp; 326 union { 327 u8 kcan_payload[64]; 328 struct kvaser_err_frame_data err_frame_data; 329 }; 330 } __packed; 331 332 struct kvaser_cmd_ext_tx_can { 333 __le32 flags; 334 __le32 id; 335 __le32 kcan_id; 336 __le32 kcan_header; 337 u8 databytes; 338 u8 dlc; 339 u8 reserved[6]; 340 u8 kcan_payload[64]; 341 } __packed; 342 343 struct kvaser_cmd_ext_tx_ack { 344 __le32 flags; 345 u8 reserved0[4]; 346 __le64 timestamp; 347 u8 reserved1[8]; 348 } __packed; 349 350 /* struct for extended commands (CMD_EXTENDED) */ 351 struct kvaser_cmd_ext { 352 struct kvaser_cmd_header header; 353 __le16 len; 354 u8 cmd_no_ext; 355 u8 reserved; 356 357 union { 358 struct kvaser_cmd_ext_rx_can rx_can; 359 struct kvaser_cmd_ext_tx_can tx_can; 360 struct kvaser_cmd_ext_tx_ack tx_ack; 361 } __packed; 362 } __packed; 363 364 static const struct can_bittiming_const kvaser_usb_hydra_kcan_bittiming_c = { 365 .name = "kvaser_usb_kcan", 366 .tseg1_min = 1, 367 .tseg1_max = 255, 368 .tseg2_min = 1, 369 .tseg2_max = 32, 370 .sjw_max = 16, 371 .brp_min = 1, 372 .brp_max = 8192, 373 .brp_inc = 1, 374 }; 375 376 static const struct can_bittiming_const kvaser_usb_hydra_flexc_bittiming_c = { 377 .name = "kvaser_usb_flex", 378 .tseg1_min = 4, 379 .tseg1_max = 16, 380 .tseg2_min = 2, 381 .tseg2_max = 8, 382 .sjw_max = 4, 383 .brp_min = 1, 384 .brp_max = 256, 385 .brp_inc = 1, 386 }; 387 388 static const struct can_bittiming_const kvaser_usb_hydra_rt_bittiming_c = { 389 .name = "kvaser_usb_rt", 390 .tseg1_min = 2, 391 .tseg1_max = 96, 392 .tseg2_min = 2, 393 .tseg2_max = 32, 394 .sjw_max = 32, 395 .brp_min = 1, 396 .brp_max = 1024, 397 .brp_inc = 1, 398 }; 399 400 static const struct can_bittiming_const kvaser_usb_hydra_rtd_bittiming_c = { 401 .name = "kvaser_usb_rt", 402 .tseg1_min = 2, 403 .tseg1_max = 39, 404 .tseg2_min = 2, 405 .tseg2_max = 8, 406 .sjw_max = 8, 407 .brp_min = 1, 408 .brp_max = 1024, 409 .brp_inc = 1, 410 }; 411 412 #define KVASER_USB_HYDRA_TRANSID_BITS 12 413 #define KVASER_USB_HYDRA_TRANSID_MASK \ 414 GENMASK(KVASER_USB_HYDRA_TRANSID_BITS - 1, 0) 415 #define KVASER_USB_HYDRA_HE_ADDR_SRC_MASK GENMASK(7, 6) 416 #define KVASER_USB_HYDRA_HE_ADDR_DEST_MASK GENMASK(5, 0) 417 #define KVASER_USB_HYDRA_HE_ADDR_SRC_BITS 2 418 static inline u16 kvaser_usb_hydra_get_cmd_transid(const struct kvaser_cmd *cmd) 419 { 420 return le16_to_cpu(cmd->header.transid) & KVASER_USB_HYDRA_TRANSID_MASK; 421 } 422 423 static inline void kvaser_usb_hydra_set_cmd_transid(struct kvaser_cmd *cmd, 424 u16 transid) 425 { 426 cmd->header.transid = 427 cpu_to_le16(transid & KVASER_USB_HYDRA_TRANSID_MASK); 428 } 429 430 static inline u8 kvaser_usb_hydra_get_cmd_src_he(const struct kvaser_cmd *cmd) 431 { 432 return (cmd->header.he_addr & KVASER_USB_HYDRA_HE_ADDR_SRC_MASK) >> 433 KVASER_USB_HYDRA_HE_ADDR_SRC_BITS | 434 le16_to_cpu(cmd->header.transid) >> 435 KVASER_USB_HYDRA_TRANSID_BITS; 436 } 437 438 static inline void kvaser_usb_hydra_set_cmd_dest_he(struct kvaser_cmd *cmd, 439 u8 dest_he) 440 { 441 cmd->header.he_addr = 442 (cmd->header.he_addr & KVASER_USB_HYDRA_HE_ADDR_SRC_MASK) | 443 (dest_he & KVASER_USB_HYDRA_HE_ADDR_DEST_MASK); 444 } 445 446 static u8 kvaser_usb_hydra_channel_from_cmd(const struct kvaser_usb *dev, 447 const struct kvaser_cmd *cmd) 448 { 449 int i; 450 u8 channel = 0xff; 451 u8 src_he = kvaser_usb_hydra_get_cmd_src_he(cmd); 452 453 for (i = 0; i < KVASER_USB_MAX_NET_DEVICES; i++) { 454 if (dev->card_data.hydra.channel_to_he[i] == src_he) { 455 channel = i; 456 break; 457 } 458 } 459 460 return channel; 461 } 462 463 static u16 kvaser_usb_hydra_get_next_transid(struct kvaser_usb *dev) 464 { 465 unsigned long flags; 466 u16 transid; 467 struct kvaser_usb_dev_card_data_hydra *card_data = 468 &dev->card_data.hydra; 469 470 spin_lock_irqsave(&card_data->transid_lock, flags); 471 transid = card_data->transid; 472 if (transid >= KVASER_USB_HYDRA_MAX_TRANSID) 473 transid = KVASER_USB_HYDRA_MIN_TRANSID; 474 else 475 transid++; 476 card_data->transid = transid; 477 spin_unlock_irqrestore(&card_data->transid_lock, flags); 478 479 return transid; 480 } 481 482 static size_t kvaser_usb_hydra_cmd_size(struct kvaser_cmd *cmd) 483 { 484 size_t ret; 485 486 if (cmd->header.cmd_no == CMD_EXTENDED) 487 ret = le16_to_cpu(((struct kvaser_cmd_ext *)cmd)->len); 488 else 489 ret = sizeof(struct kvaser_cmd); 490 491 return ret; 492 } 493 494 static struct kvaser_usb_net_priv * 495 kvaser_usb_hydra_net_priv_from_cmd(const struct kvaser_usb *dev, 496 const struct kvaser_cmd *cmd) 497 { 498 struct kvaser_usb_net_priv *priv = NULL; 499 u8 channel = kvaser_usb_hydra_channel_from_cmd(dev, cmd); 500 501 if (channel >= dev->nchannels) 502 dev_err(&dev->intf->dev, 503 "Invalid channel number (%d)\n", channel); 504 else 505 priv = dev->nets[channel]; 506 507 return priv; 508 } 509 510 static ktime_t 511 kvaser_usb_hydra_ktime_from_rx_cmd(const struct kvaser_usb_dev_cfg *cfg, 512 const struct kvaser_cmd *cmd) 513 { 514 u64 ticks; 515 516 if (cmd->header.cmd_no == CMD_EXTENDED) { 517 struct kvaser_cmd_ext *cmd_ext = (struct kvaser_cmd_ext *)cmd; 518 519 ticks = le64_to_cpu(cmd_ext->rx_can.timestamp); 520 } else { 521 ticks = le16_to_cpu(cmd->rx_can.timestamp[0]); 522 ticks += (u64)(le16_to_cpu(cmd->rx_can.timestamp[1])) << 16; 523 ticks += (u64)(le16_to_cpu(cmd->rx_can.timestamp[2])) << 32; 524 } 525 526 return ns_to_ktime(div_u64(ticks * 1000, cfg->timestamp_freq)); 527 } 528 529 static int kvaser_usb_hydra_send_simple_cmd(struct kvaser_usb *dev, 530 u8 cmd_no, int channel) 531 { 532 struct kvaser_cmd *cmd; 533 int err; 534 535 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 536 if (!cmd) 537 return -ENOMEM; 538 539 cmd->header.cmd_no = cmd_no; 540 if (channel < 0) { 541 kvaser_usb_hydra_set_cmd_dest_he 542 (cmd, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL); 543 } else { 544 if (channel >= KVASER_USB_MAX_NET_DEVICES) { 545 dev_err(&dev->intf->dev, "channel (%d) out of range.\n", 546 channel); 547 err = -EINVAL; 548 goto end; 549 } 550 kvaser_usb_hydra_set_cmd_dest_he 551 (cmd, dev->card_data.hydra.channel_to_he[channel]); 552 } 553 kvaser_usb_hydra_set_cmd_transid 554 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 555 556 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 557 if (err) 558 goto end; 559 560 end: 561 kfree(cmd); 562 563 return err; 564 } 565 566 static int 567 kvaser_usb_hydra_send_simple_cmd_async(struct kvaser_usb_net_priv *priv, 568 u8 cmd_no) 569 { 570 struct kvaser_cmd *cmd; 571 struct kvaser_usb *dev = priv->dev; 572 int err; 573 574 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_ATOMIC); 575 if (!cmd) 576 return -ENOMEM; 577 578 cmd->header.cmd_no = cmd_no; 579 580 kvaser_usb_hydra_set_cmd_dest_he 581 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 582 kvaser_usb_hydra_set_cmd_transid 583 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 584 585 err = kvaser_usb_send_cmd_async(priv, cmd, 586 kvaser_usb_hydra_cmd_size(cmd)); 587 if (err) 588 kfree(cmd); 589 590 return err; 591 } 592 593 /* This function is used for synchronously waiting on hydra control commands. 594 * Note: Compared to kvaser_usb_hydra_read_bulk_callback(), we never need to 595 * handle partial hydra commands. Since hydra control commands are always 596 * non-extended commands. 597 */ 598 static int kvaser_usb_hydra_wait_cmd(const struct kvaser_usb *dev, u8 cmd_no, 599 struct kvaser_cmd *cmd) 600 { 601 void *buf; 602 int err; 603 unsigned long timeout = jiffies + msecs_to_jiffies(KVASER_USB_TIMEOUT); 604 605 if (cmd->header.cmd_no == CMD_EXTENDED) { 606 dev_err(&dev->intf->dev, "Wait for CMD_EXTENDED not allowed\n"); 607 return -EINVAL; 608 } 609 610 buf = kzalloc(KVASER_USB_RX_BUFFER_SIZE, GFP_KERNEL); 611 if (!buf) 612 return -ENOMEM; 613 614 do { 615 int actual_len = 0; 616 int pos = 0; 617 618 err = kvaser_usb_recv_cmd(dev, buf, KVASER_USB_RX_BUFFER_SIZE, 619 &actual_len); 620 if (err < 0) 621 goto end; 622 623 while (pos < actual_len) { 624 struct kvaser_cmd *tmp_cmd; 625 size_t cmd_len; 626 627 tmp_cmd = buf + pos; 628 cmd_len = kvaser_usb_hydra_cmd_size(tmp_cmd); 629 if (pos + cmd_len > actual_len) { 630 dev_err_ratelimited(&dev->intf->dev, 631 "Format error\n"); 632 break; 633 } 634 635 if (tmp_cmd->header.cmd_no == cmd_no) { 636 memcpy(cmd, tmp_cmd, cmd_len); 637 goto end; 638 } 639 pos += cmd_len; 640 } 641 } while (time_before(jiffies, timeout)); 642 643 err = -EINVAL; 644 645 end: 646 kfree(buf); 647 648 return err; 649 } 650 651 static int kvaser_usb_hydra_map_channel_resp(struct kvaser_usb *dev, 652 const struct kvaser_cmd *cmd) 653 { 654 u8 he, channel; 655 u16 transid = kvaser_usb_hydra_get_cmd_transid(cmd); 656 struct kvaser_usb_dev_card_data_hydra *card_data = 657 &dev->card_data.hydra; 658 659 if (transid > 0x007f || transid < 0x0040) { 660 dev_err(&dev->intf->dev, 661 "CMD_MAP_CHANNEL_RESP, invalid transid: 0x%x\n", 662 transid); 663 return -EINVAL; 664 } 665 666 switch (transid) { 667 case KVASER_USB_HYDRA_TRANSID_CANHE: 668 case KVASER_USB_HYDRA_TRANSID_CANHE + 1: 669 case KVASER_USB_HYDRA_TRANSID_CANHE + 2: 670 case KVASER_USB_HYDRA_TRANSID_CANHE + 3: 671 case KVASER_USB_HYDRA_TRANSID_CANHE + 4: 672 channel = transid & 0x000f; 673 he = cmd->map_ch_res.he_addr; 674 card_data->channel_to_he[channel] = he; 675 break; 676 case KVASER_USB_HYDRA_TRANSID_SYSDBG: 677 card_data->sysdbg_he = cmd->map_ch_res.he_addr; 678 break; 679 default: 680 dev_warn(&dev->intf->dev, 681 "Unknown CMD_MAP_CHANNEL_RESP transid=0x%x\n", 682 transid); 683 break; 684 } 685 686 return 0; 687 } 688 689 static int kvaser_usb_hydra_map_channel(struct kvaser_usb *dev, u16 transid, 690 u8 channel, const char *name) 691 { 692 struct kvaser_cmd *cmd; 693 int err; 694 695 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 696 if (!cmd) 697 return -ENOMEM; 698 699 strcpy(cmd->map_ch_req.name, name); 700 cmd->header.cmd_no = CMD_MAP_CHANNEL_REQ; 701 kvaser_usb_hydra_set_cmd_dest_he 702 (cmd, KVASER_USB_HYDRA_HE_ADDRESS_ROUTER); 703 cmd->map_ch_req.channel = channel; 704 705 kvaser_usb_hydra_set_cmd_transid(cmd, transid); 706 707 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 708 if (err) 709 goto end; 710 711 err = kvaser_usb_hydra_wait_cmd(dev, CMD_MAP_CHANNEL_RESP, cmd); 712 if (err) 713 goto end; 714 715 err = kvaser_usb_hydra_map_channel_resp(dev, cmd); 716 if (err) 717 goto end; 718 719 end: 720 kfree(cmd); 721 722 return err; 723 } 724 725 static int kvaser_usb_hydra_get_single_capability(struct kvaser_usb *dev, 726 u16 cap_cmd_req, u16 *status) 727 { 728 struct kvaser_usb_dev_card_data *card_data = &dev->card_data; 729 struct kvaser_cmd *cmd; 730 u32 value = 0; 731 u32 mask = 0; 732 u16 cap_cmd_res; 733 int err; 734 int i; 735 736 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 737 if (!cmd) 738 return -ENOMEM; 739 740 cmd->header.cmd_no = CMD_GET_CAPABILITIES_REQ; 741 cmd->cap_req.cap_cmd = cpu_to_le16(cap_cmd_req); 742 743 kvaser_usb_hydra_set_cmd_dest_he(cmd, card_data->hydra.sysdbg_he); 744 kvaser_usb_hydra_set_cmd_transid 745 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 746 747 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 748 if (err) 749 goto end; 750 751 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_CAPABILITIES_RESP, cmd); 752 if (err) 753 goto end; 754 755 *status = le16_to_cpu(cmd->cap_res.status); 756 757 if (*status != KVASER_USB_HYDRA_CAP_STAT_OK) 758 goto end; 759 760 cap_cmd_res = le16_to_cpu(cmd->cap_res.cap_cmd); 761 switch (cap_cmd_res) { 762 case KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE: 763 case KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT: 764 case KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT: 765 value = le32_to_cpu(cmd->cap_res.value); 766 mask = le32_to_cpu(cmd->cap_res.mask); 767 break; 768 default: 769 dev_warn(&dev->intf->dev, "Unknown capability command %u\n", 770 cap_cmd_res); 771 break; 772 } 773 774 for (i = 0; i < dev->nchannels; i++) { 775 if (BIT(i) & (value & mask)) { 776 switch (cap_cmd_res) { 777 case KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE: 778 card_data->ctrlmode_supported |= 779 CAN_CTRLMODE_LISTENONLY; 780 break; 781 case KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT: 782 card_data->capabilities |= 783 KVASER_USB_CAP_BERR_CAP; 784 break; 785 case KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT: 786 card_data->ctrlmode_supported |= 787 CAN_CTRLMODE_ONE_SHOT; 788 break; 789 } 790 } 791 } 792 793 end: 794 kfree(cmd); 795 796 return err; 797 } 798 799 static void kvaser_usb_hydra_start_chip_reply(const struct kvaser_usb *dev, 800 const struct kvaser_cmd *cmd) 801 { 802 struct kvaser_usb_net_priv *priv; 803 804 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 805 if (!priv) 806 return; 807 808 if (completion_done(&priv->start_comp) && 809 netif_queue_stopped(priv->netdev)) { 810 netif_wake_queue(priv->netdev); 811 } else { 812 netif_start_queue(priv->netdev); 813 complete(&priv->start_comp); 814 } 815 } 816 817 static void kvaser_usb_hydra_stop_chip_reply(const struct kvaser_usb *dev, 818 const struct kvaser_cmd *cmd) 819 { 820 struct kvaser_usb_net_priv *priv; 821 822 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 823 if (!priv) 824 return; 825 826 complete(&priv->stop_comp); 827 } 828 829 static void kvaser_usb_hydra_flush_queue_reply(const struct kvaser_usb *dev, 830 const struct kvaser_cmd *cmd) 831 { 832 struct kvaser_usb_net_priv *priv; 833 834 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 835 if (!priv) 836 return; 837 838 complete(&priv->flush_comp); 839 } 840 841 static void 842 kvaser_usb_hydra_bus_status_to_can_state(const struct kvaser_usb_net_priv *priv, 843 u8 bus_status, 844 const struct can_berr_counter *bec, 845 enum can_state *new_state) 846 { 847 if (bus_status & KVASER_USB_HYDRA_BUS_BUS_OFF) { 848 *new_state = CAN_STATE_BUS_OFF; 849 } else if (bus_status & KVASER_USB_HYDRA_BUS_ERR_PASS) { 850 *new_state = CAN_STATE_ERROR_PASSIVE; 851 } else if (bus_status == KVASER_USB_HYDRA_BUS_ERR_ACT) { 852 if (bec->txerr >= 128 || bec->rxerr >= 128) { 853 netdev_warn(priv->netdev, 854 "ERR_ACTIVE but err tx=%u or rx=%u >=128\n", 855 bec->txerr, bec->rxerr); 856 *new_state = CAN_STATE_ERROR_PASSIVE; 857 } else if (bec->txerr >= 96 || bec->rxerr >= 96) { 858 *new_state = CAN_STATE_ERROR_WARNING; 859 } else { 860 *new_state = CAN_STATE_ERROR_ACTIVE; 861 } 862 } 863 } 864 865 static void kvaser_usb_hydra_update_state(struct kvaser_usb_net_priv *priv, 866 u8 bus_status, 867 const struct can_berr_counter *bec) 868 { 869 struct net_device *netdev = priv->netdev; 870 struct can_frame *cf; 871 struct sk_buff *skb; 872 struct net_device_stats *stats; 873 enum can_state new_state, old_state; 874 875 old_state = priv->can.state; 876 877 kvaser_usb_hydra_bus_status_to_can_state(priv, bus_status, bec, 878 &new_state); 879 880 if (new_state == old_state) 881 return; 882 883 /* Ignore state change if previous state was STOPPED and the new state 884 * is BUS_OFF. Firmware always report this as BUS_OFF, since firmware 885 * does not distinguish between BUS_OFF and STOPPED. 886 */ 887 if (old_state == CAN_STATE_STOPPED && new_state == CAN_STATE_BUS_OFF) 888 return; 889 890 skb = alloc_can_err_skb(netdev, &cf); 891 if (skb) { 892 enum can_state tx_state, rx_state; 893 894 tx_state = (bec->txerr >= bec->rxerr) ? 895 new_state : CAN_STATE_ERROR_ACTIVE; 896 rx_state = (bec->txerr <= bec->rxerr) ? 897 new_state : CAN_STATE_ERROR_ACTIVE; 898 can_change_state(netdev, cf, tx_state, rx_state); 899 } 900 901 if (new_state == CAN_STATE_BUS_OFF && old_state < CAN_STATE_BUS_OFF) { 902 if (!priv->can.restart_ms) 903 kvaser_usb_hydra_send_simple_cmd_async 904 (priv, CMD_STOP_CHIP_REQ); 905 906 can_bus_off(netdev); 907 } 908 909 if (!skb) { 910 netdev_warn(netdev, "No memory left for err_skb\n"); 911 return; 912 } 913 914 if (priv->can.restart_ms && 915 old_state >= CAN_STATE_BUS_OFF && 916 new_state < CAN_STATE_BUS_OFF) 917 priv->can.can_stats.restarts++; 918 919 cf->data[6] = bec->txerr; 920 cf->data[7] = bec->rxerr; 921 922 stats = &netdev->stats; 923 stats->rx_packets++; 924 stats->rx_bytes += cf->len; 925 netif_rx(skb); 926 } 927 928 static void kvaser_usb_hydra_state_event(const struct kvaser_usb *dev, 929 const struct kvaser_cmd *cmd) 930 { 931 struct kvaser_usb_net_priv *priv; 932 struct can_berr_counter bec; 933 u8 bus_status; 934 935 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 936 if (!priv) 937 return; 938 939 bus_status = cmd->chip_state_event.bus_status; 940 bec.txerr = cmd->chip_state_event.tx_err_counter; 941 bec.rxerr = cmd->chip_state_event.rx_err_counter; 942 943 kvaser_usb_hydra_update_state(priv, bus_status, &bec); 944 priv->bec.txerr = bec.txerr; 945 priv->bec.rxerr = bec.rxerr; 946 } 947 948 static void kvaser_usb_hydra_error_event_parameter(const struct kvaser_usb *dev, 949 const struct kvaser_cmd *cmd) 950 { 951 /* info1 will contain the offending cmd_no */ 952 switch (le16_to_cpu(cmd->error_event.info1)) { 953 case CMD_START_CHIP_REQ: 954 dev_warn(&dev->intf->dev, 955 "CMD_START_CHIP_REQ error in parameter\n"); 956 break; 957 958 case CMD_STOP_CHIP_REQ: 959 dev_warn(&dev->intf->dev, 960 "CMD_STOP_CHIP_REQ error in parameter\n"); 961 break; 962 963 case CMD_FLUSH_QUEUE: 964 dev_warn(&dev->intf->dev, 965 "CMD_FLUSH_QUEUE error in parameter\n"); 966 break; 967 968 case CMD_SET_BUSPARAMS_REQ: 969 dev_warn(&dev->intf->dev, 970 "Set bittiming failed. Error in parameter\n"); 971 break; 972 973 case CMD_SET_BUSPARAMS_FD_REQ: 974 dev_warn(&dev->intf->dev, 975 "Set data bittiming failed. Error in parameter\n"); 976 break; 977 978 default: 979 dev_warn(&dev->intf->dev, 980 "Unhandled parameter error event cmd_no (%u)\n", 981 le16_to_cpu(cmd->error_event.info1)); 982 break; 983 } 984 } 985 986 static void kvaser_usb_hydra_error_event(const struct kvaser_usb *dev, 987 const struct kvaser_cmd *cmd) 988 { 989 switch (cmd->error_event.error_code) { 990 case KVASER_USB_HYDRA_ERROR_EVENT_PARAM: 991 kvaser_usb_hydra_error_event_parameter(dev, cmd); 992 break; 993 994 case KVASER_USB_HYDRA_ERROR_EVENT_CAN: 995 /* Wrong channel mapping?! This should never happen! 996 * info1 will contain the offending cmd_no 997 */ 998 dev_err(&dev->intf->dev, 999 "Received CAN error event for cmd_no (%u)\n", 1000 le16_to_cpu(cmd->error_event.info1)); 1001 break; 1002 1003 default: 1004 dev_warn(&dev->intf->dev, 1005 "Unhandled error event (%d)\n", 1006 cmd->error_event.error_code); 1007 break; 1008 } 1009 } 1010 1011 static void 1012 kvaser_usb_hydra_error_frame(struct kvaser_usb_net_priv *priv, 1013 const struct kvaser_err_frame_data *err_frame_data, 1014 ktime_t hwtstamp) 1015 { 1016 struct net_device *netdev = priv->netdev; 1017 struct net_device_stats *stats = &netdev->stats; 1018 struct can_frame *cf; 1019 struct sk_buff *skb; 1020 struct skb_shared_hwtstamps *shhwtstamps; 1021 struct can_berr_counter bec; 1022 enum can_state new_state, old_state; 1023 u8 bus_status; 1024 1025 priv->can.can_stats.bus_error++; 1026 stats->rx_errors++; 1027 1028 bus_status = err_frame_data->bus_status; 1029 bec.txerr = err_frame_data->tx_err_counter; 1030 bec.rxerr = err_frame_data->rx_err_counter; 1031 1032 old_state = priv->can.state; 1033 kvaser_usb_hydra_bus_status_to_can_state(priv, bus_status, &bec, 1034 &new_state); 1035 1036 skb = alloc_can_err_skb(netdev, &cf); 1037 1038 if (new_state != old_state) { 1039 if (skb) { 1040 enum can_state tx_state, rx_state; 1041 1042 tx_state = (bec.txerr >= bec.rxerr) ? 1043 new_state : CAN_STATE_ERROR_ACTIVE; 1044 rx_state = (bec.txerr <= bec.rxerr) ? 1045 new_state : CAN_STATE_ERROR_ACTIVE; 1046 1047 can_change_state(netdev, cf, tx_state, rx_state); 1048 1049 if (priv->can.restart_ms && 1050 old_state >= CAN_STATE_BUS_OFF && 1051 new_state < CAN_STATE_BUS_OFF) 1052 cf->can_id |= CAN_ERR_RESTARTED; 1053 } 1054 1055 if (new_state == CAN_STATE_BUS_OFF) { 1056 if (!priv->can.restart_ms) 1057 kvaser_usb_hydra_send_simple_cmd_async 1058 (priv, CMD_STOP_CHIP_REQ); 1059 1060 can_bus_off(netdev); 1061 } 1062 } 1063 1064 if (!skb) { 1065 stats->rx_dropped++; 1066 netdev_warn(netdev, "No memory left for err_skb\n"); 1067 return; 1068 } 1069 1070 shhwtstamps = skb_hwtstamps(skb); 1071 shhwtstamps->hwtstamp = hwtstamp; 1072 1073 cf->can_id |= CAN_ERR_BUSERROR; 1074 cf->data[6] = bec.txerr; 1075 cf->data[7] = bec.rxerr; 1076 1077 stats->rx_packets++; 1078 stats->rx_bytes += cf->len; 1079 netif_rx(skb); 1080 1081 priv->bec.txerr = bec.txerr; 1082 priv->bec.rxerr = bec.rxerr; 1083 } 1084 1085 static void kvaser_usb_hydra_one_shot_fail(struct kvaser_usb_net_priv *priv, 1086 const struct kvaser_cmd_ext *cmd) 1087 { 1088 struct net_device *netdev = priv->netdev; 1089 struct net_device_stats *stats = &netdev->stats; 1090 struct can_frame *cf; 1091 struct sk_buff *skb; 1092 u32 flags; 1093 1094 skb = alloc_can_err_skb(netdev, &cf); 1095 if (!skb) { 1096 stats->rx_dropped++; 1097 netdev_warn(netdev, "No memory left for err_skb\n"); 1098 return; 1099 } 1100 1101 cf->can_id |= CAN_ERR_BUSERROR; 1102 flags = le32_to_cpu(cmd->tx_ack.flags); 1103 1104 if (flags & KVASER_USB_HYDRA_CF_FLAG_OSM_NACK) 1105 cf->can_id |= CAN_ERR_ACK; 1106 if (flags & KVASER_USB_HYDRA_CF_FLAG_ABL) { 1107 cf->can_id |= CAN_ERR_LOSTARB; 1108 priv->can.can_stats.arbitration_lost++; 1109 } 1110 1111 stats->tx_errors++; 1112 stats->rx_packets++; 1113 stats->rx_bytes += cf->len; 1114 netif_rx(skb); 1115 } 1116 1117 static void kvaser_usb_hydra_tx_acknowledge(const struct kvaser_usb *dev, 1118 const struct kvaser_cmd *cmd) 1119 { 1120 struct kvaser_usb_tx_urb_context *context; 1121 struct kvaser_usb_net_priv *priv; 1122 unsigned long irq_flags; 1123 bool one_shot_fail = false; 1124 u16 transid = kvaser_usb_hydra_get_cmd_transid(cmd); 1125 1126 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 1127 if (!priv) 1128 return; 1129 1130 if (!netif_device_present(priv->netdev)) 1131 return; 1132 1133 if (cmd->header.cmd_no == CMD_EXTENDED) { 1134 struct kvaser_cmd_ext *cmd_ext = (struct kvaser_cmd_ext *)cmd; 1135 u32 flags = le32_to_cpu(cmd_ext->tx_ack.flags); 1136 1137 if (flags & (KVASER_USB_HYDRA_CF_FLAG_OSM_NACK | 1138 KVASER_USB_HYDRA_CF_FLAG_ABL)) { 1139 kvaser_usb_hydra_one_shot_fail(priv, cmd_ext); 1140 one_shot_fail = true; 1141 } 1142 } 1143 1144 context = &priv->tx_contexts[transid % dev->max_tx_urbs]; 1145 if (!one_shot_fail) { 1146 struct net_device_stats *stats = &priv->netdev->stats; 1147 1148 stats->tx_packets++; 1149 stats->tx_bytes += can_fd_dlc2len(context->dlc); 1150 } 1151 1152 spin_lock_irqsave(&priv->tx_contexts_lock, irq_flags); 1153 1154 can_get_echo_skb(priv->netdev, context->echo_index); 1155 context->echo_index = dev->max_tx_urbs; 1156 --priv->active_tx_contexts; 1157 netif_wake_queue(priv->netdev); 1158 1159 spin_unlock_irqrestore(&priv->tx_contexts_lock, irq_flags); 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_packets++; 1217 stats->rx_bytes += cf->len; 1218 netif_rx(skb); 1219 } 1220 1221 static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev, 1222 const struct kvaser_cmd_ext *cmd) 1223 { 1224 struct kvaser_cmd *std_cmd = (struct kvaser_cmd *)cmd; 1225 struct kvaser_usb_net_priv *priv; 1226 struct canfd_frame *cf; 1227 struct sk_buff *skb; 1228 struct skb_shared_hwtstamps *shhwtstamps; 1229 struct net_device_stats *stats; 1230 u32 flags; 1231 u8 dlc; 1232 u32 kcan_header; 1233 ktime_t hwtstamp; 1234 1235 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, std_cmd); 1236 if (!priv) 1237 return; 1238 1239 stats = &priv->netdev->stats; 1240 1241 kcan_header = le32_to_cpu(cmd->rx_can.kcan_header); 1242 dlc = (kcan_header & KVASER_USB_KCAN_DATA_DLC_MASK) >> 1243 KVASER_USB_KCAN_DATA_DLC_SHIFT; 1244 1245 flags = le32_to_cpu(cmd->rx_can.flags); 1246 hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, std_cmd); 1247 1248 if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) { 1249 kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data, 1250 hwtstamp); 1251 return; 1252 } 1253 1254 if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) 1255 skb = alloc_canfd_skb(priv->netdev, &cf); 1256 else 1257 skb = alloc_can_skb(priv->netdev, (struct can_frame **)&cf); 1258 1259 if (!skb) { 1260 stats->rx_dropped++; 1261 return; 1262 } 1263 1264 shhwtstamps = skb_hwtstamps(skb); 1265 shhwtstamps->hwtstamp = hwtstamp; 1266 1267 cf->can_id = le32_to_cpu(cmd->rx_can.id); 1268 1269 if (flags & KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID) { 1270 cf->can_id &= CAN_EFF_MASK; 1271 cf->can_id |= CAN_EFF_FLAG; 1272 } else { 1273 cf->can_id &= CAN_SFF_MASK; 1274 } 1275 1276 if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN) 1277 kvaser_usb_can_rx_over_error(priv->netdev); 1278 1279 if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) { 1280 cf->len = can_fd_dlc2len(dlc); 1281 if (flags & KVASER_USB_HYDRA_CF_FLAG_BRS) 1282 cf->flags |= CANFD_BRS; 1283 if (flags & KVASER_USB_HYDRA_CF_FLAG_ESI) 1284 cf->flags |= CANFD_ESI; 1285 } else { 1286 cf->len = can_cc_dlc2len(dlc); 1287 } 1288 1289 if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) 1290 cf->can_id |= CAN_RTR_FLAG; 1291 else 1292 memcpy(cf->data, cmd->rx_can.kcan_payload, cf->len); 1293 1294 stats->rx_packets++; 1295 stats->rx_bytes += cf->len; 1296 netif_rx(skb); 1297 } 1298 1299 static void kvaser_usb_hydra_handle_cmd_std(const struct kvaser_usb *dev, 1300 const struct kvaser_cmd *cmd) 1301 { 1302 switch (cmd->header.cmd_no) { 1303 case CMD_START_CHIP_RESP: 1304 kvaser_usb_hydra_start_chip_reply(dev, cmd); 1305 break; 1306 1307 case CMD_STOP_CHIP_RESP: 1308 kvaser_usb_hydra_stop_chip_reply(dev, cmd); 1309 break; 1310 1311 case CMD_FLUSH_QUEUE_RESP: 1312 kvaser_usb_hydra_flush_queue_reply(dev, cmd); 1313 break; 1314 1315 case CMD_CHIP_STATE_EVENT: 1316 kvaser_usb_hydra_state_event(dev, cmd); 1317 break; 1318 1319 case CMD_ERROR_EVENT: 1320 kvaser_usb_hydra_error_event(dev, cmd); 1321 break; 1322 1323 case CMD_TX_ACKNOWLEDGE: 1324 kvaser_usb_hydra_tx_acknowledge(dev, cmd); 1325 break; 1326 1327 case CMD_RX_MESSAGE: 1328 kvaser_usb_hydra_rx_msg_std(dev, cmd); 1329 break; 1330 1331 /* Ignored commands */ 1332 case CMD_SET_BUSPARAMS_RESP: 1333 case CMD_SET_BUSPARAMS_FD_RESP: 1334 break; 1335 1336 default: 1337 dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", 1338 cmd->header.cmd_no); 1339 break; 1340 } 1341 } 1342 1343 static void kvaser_usb_hydra_handle_cmd_ext(const struct kvaser_usb *dev, 1344 const struct kvaser_cmd_ext *cmd) 1345 { 1346 switch (cmd->cmd_no_ext) { 1347 case CMD_TX_ACKNOWLEDGE_FD: 1348 kvaser_usb_hydra_tx_acknowledge(dev, (struct kvaser_cmd *)cmd); 1349 break; 1350 1351 case CMD_RX_MESSAGE_FD: 1352 kvaser_usb_hydra_rx_msg_ext(dev, cmd); 1353 break; 1354 1355 default: 1356 dev_warn(&dev->intf->dev, "Unhandled extended command (%d)\n", 1357 cmd->header.cmd_no); 1358 break; 1359 } 1360 } 1361 1362 static void kvaser_usb_hydra_handle_cmd(const struct kvaser_usb *dev, 1363 const struct kvaser_cmd *cmd) 1364 { 1365 if (cmd->header.cmd_no == CMD_EXTENDED) 1366 kvaser_usb_hydra_handle_cmd_ext 1367 (dev, (struct kvaser_cmd_ext *)cmd); 1368 else 1369 kvaser_usb_hydra_handle_cmd_std(dev, cmd); 1370 } 1371 1372 static void * 1373 kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv, 1374 const struct sk_buff *skb, int *frame_len, 1375 int *cmd_len, u16 transid) 1376 { 1377 struct kvaser_usb *dev = priv->dev; 1378 struct kvaser_cmd_ext *cmd; 1379 struct canfd_frame *cf = (struct canfd_frame *)skb->data; 1380 u8 dlc = can_fd_len2dlc(cf->len); 1381 u8 nbr_of_bytes = cf->len; 1382 u32 flags; 1383 u32 id; 1384 u32 kcan_id; 1385 u32 kcan_header; 1386 1387 *frame_len = nbr_of_bytes; 1388 1389 cmd = kcalloc(1, sizeof(struct kvaser_cmd_ext), GFP_ATOMIC); 1390 if (!cmd) 1391 return NULL; 1392 1393 kvaser_usb_hydra_set_cmd_dest_he 1394 ((struct kvaser_cmd *)cmd, 1395 dev->card_data.hydra.channel_to_he[priv->channel]); 1396 kvaser_usb_hydra_set_cmd_transid((struct kvaser_cmd *)cmd, transid); 1397 1398 cmd->header.cmd_no = CMD_EXTENDED; 1399 cmd->cmd_no_ext = CMD_TX_CAN_MESSAGE_FD; 1400 1401 *cmd_len = ALIGN(sizeof(struct kvaser_cmd_ext) - 1402 sizeof(cmd->tx_can.kcan_payload) + nbr_of_bytes, 1403 8); 1404 1405 cmd->len = cpu_to_le16(*cmd_len); 1406 1407 cmd->tx_can.databytes = nbr_of_bytes; 1408 cmd->tx_can.dlc = dlc; 1409 1410 if (cf->can_id & CAN_EFF_FLAG) { 1411 id = cf->can_id & CAN_EFF_MASK; 1412 flags = KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID; 1413 kcan_id = (cf->can_id & CAN_EFF_MASK) | 1414 KVASER_USB_KCAN_DATA_IDE | KVASER_USB_KCAN_DATA_SRR; 1415 } else { 1416 id = cf->can_id & CAN_SFF_MASK; 1417 flags = 0; 1418 kcan_id = cf->can_id & CAN_SFF_MASK; 1419 } 1420 1421 if (cf->can_id & CAN_ERR_FLAG) 1422 flags |= KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME; 1423 1424 kcan_header = ((dlc << KVASER_USB_KCAN_DATA_DLC_SHIFT) & 1425 KVASER_USB_KCAN_DATA_DLC_MASK) | 1426 KVASER_USB_KCAN_DATA_AREQ | 1427 (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT ? 1428 KVASER_USB_KCAN_DATA_OSM : 0); 1429 1430 if (can_is_canfd_skb(skb)) { 1431 kcan_header |= KVASER_USB_KCAN_DATA_FDF | 1432 (cf->flags & CANFD_BRS ? 1433 KVASER_USB_KCAN_DATA_BRS : 0); 1434 } else { 1435 if (cf->can_id & CAN_RTR_FLAG) { 1436 kcan_id |= KVASER_USB_KCAN_DATA_RTR; 1437 cmd->tx_can.databytes = 0; 1438 flags |= KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME; 1439 } 1440 } 1441 1442 cmd->tx_can.kcan_id = cpu_to_le32(kcan_id); 1443 cmd->tx_can.id = cpu_to_le32(id); 1444 cmd->tx_can.flags = cpu_to_le32(flags); 1445 cmd->tx_can.kcan_header = cpu_to_le32(kcan_header); 1446 1447 memcpy(cmd->tx_can.kcan_payload, cf->data, nbr_of_bytes); 1448 1449 return cmd; 1450 } 1451 1452 static void * 1453 kvaser_usb_hydra_frame_to_cmd_std(const struct kvaser_usb_net_priv *priv, 1454 const struct sk_buff *skb, int *frame_len, 1455 int *cmd_len, u16 transid) 1456 { 1457 struct kvaser_usb *dev = priv->dev; 1458 struct kvaser_cmd *cmd; 1459 struct can_frame *cf = (struct can_frame *)skb->data; 1460 u32 flags; 1461 u32 id; 1462 1463 *frame_len = cf->len; 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, *frame_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 *frame_len, 2007 int *cmd_len, 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, frame_len, 2013 cmd_len, transid); 2014 else 2015 buf = kvaser_usb_hydra_frame_to_cmd_std(priv, skb, frame_len, 2016 cmd_len, 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 = 80000000, 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 = 24000000, 2053 }, 2054 .timestamp_freq = 1, 2055 .bittiming_const = &kvaser_usb_hydra_flexc_bittiming_c, 2056 }; 2057 2058 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_rt = { 2059 .clock = { 2060 .freq = 80000000, 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