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 if (new_state != CAN_STATE_BUS_OFF) { 921 cf->data[6] = bec->txerr; 922 cf->data[7] = bec->rxerr; 923 } 924 925 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 if (new_state != CAN_STATE_BUS_OFF) { 1075 cf->data[6] = bec.txerr; 1076 cf->data[7] = bec.rxerr; 1077 } 1078 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 netif_rx(skb); 1113 } 1114 1115 static void kvaser_usb_hydra_tx_acknowledge(const struct kvaser_usb *dev, 1116 const struct kvaser_cmd *cmd) 1117 { 1118 struct kvaser_usb_tx_urb_context *context; 1119 struct kvaser_usb_net_priv *priv; 1120 unsigned long irq_flags; 1121 unsigned int len; 1122 bool one_shot_fail = false; 1123 bool is_err_frame = 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 is_err_frame = flags & KVASER_USB_HYDRA_CF_FLAG_TX_ACK && 1144 flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME; 1145 } 1146 1147 context = &priv->tx_contexts[transid % dev->max_tx_urbs]; 1148 1149 spin_lock_irqsave(&priv->tx_contexts_lock, irq_flags); 1150 1151 len = can_get_echo_skb(priv->netdev, context->echo_index, NULL); 1152 context->echo_index = dev->max_tx_urbs; 1153 --priv->active_tx_contexts; 1154 netif_wake_queue(priv->netdev); 1155 1156 spin_unlock_irqrestore(&priv->tx_contexts_lock, irq_flags); 1157 1158 if (!one_shot_fail && !is_err_frame) { 1159 struct net_device_stats *stats = &priv->netdev->stats; 1160 1161 stats->tx_packets++; 1162 stats->tx_bytes += len; 1163 } 1164 } 1165 1166 static void kvaser_usb_hydra_rx_msg_std(const struct kvaser_usb *dev, 1167 const struct kvaser_cmd *cmd) 1168 { 1169 struct kvaser_usb_net_priv *priv = NULL; 1170 struct can_frame *cf; 1171 struct sk_buff *skb; 1172 struct skb_shared_hwtstamps *shhwtstamps; 1173 struct net_device_stats *stats; 1174 u8 flags; 1175 ktime_t hwtstamp; 1176 1177 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 1178 if (!priv) 1179 return; 1180 1181 stats = &priv->netdev->stats; 1182 1183 flags = cmd->rx_can.flags; 1184 hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, cmd); 1185 1186 if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) { 1187 kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data, 1188 hwtstamp); 1189 return; 1190 } 1191 1192 skb = alloc_can_skb(priv->netdev, &cf); 1193 if (!skb) { 1194 stats->rx_dropped++; 1195 return; 1196 } 1197 1198 shhwtstamps = skb_hwtstamps(skb); 1199 shhwtstamps->hwtstamp = hwtstamp; 1200 1201 cf->can_id = le32_to_cpu(cmd->rx_can.id); 1202 1203 if (cf->can_id & KVASER_USB_HYDRA_EXTENDED_FRAME_ID) { 1204 cf->can_id &= CAN_EFF_MASK; 1205 cf->can_id |= CAN_EFF_FLAG; 1206 } else { 1207 cf->can_id &= CAN_SFF_MASK; 1208 } 1209 1210 if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN) 1211 kvaser_usb_can_rx_over_error(priv->netdev); 1212 1213 cf->len = can_cc_dlc2len(cmd->rx_can.dlc); 1214 1215 if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) { 1216 cf->can_id |= CAN_RTR_FLAG; 1217 } else { 1218 memcpy(cf->data, cmd->rx_can.data, cf->len); 1219 1220 stats->rx_bytes += cf->len; 1221 } 1222 stats->rx_packets++; 1223 1224 netif_rx(skb); 1225 } 1226 1227 static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev, 1228 const struct kvaser_cmd_ext *cmd) 1229 { 1230 struct kvaser_cmd *std_cmd = (struct kvaser_cmd *)cmd; 1231 struct kvaser_usb_net_priv *priv; 1232 struct canfd_frame *cf; 1233 struct sk_buff *skb; 1234 struct skb_shared_hwtstamps *shhwtstamps; 1235 struct net_device_stats *stats; 1236 u32 flags; 1237 u8 dlc; 1238 u32 kcan_header; 1239 ktime_t hwtstamp; 1240 1241 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, std_cmd); 1242 if (!priv) 1243 return; 1244 1245 stats = &priv->netdev->stats; 1246 1247 kcan_header = le32_to_cpu(cmd->rx_can.kcan_header); 1248 dlc = (kcan_header & KVASER_USB_KCAN_DATA_DLC_MASK) >> 1249 KVASER_USB_KCAN_DATA_DLC_SHIFT; 1250 1251 flags = le32_to_cpu(cmd->rx_can.flags); 1252 hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, std_cmd); 1253 1254 if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) { 1255 kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data, 1256 hwtstamp); 1257 return; 1258 } 1259 1260 if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) 1261 skb = alloc_canfd_skb(priv->netdev, &cf); 1262 else 1263 skb = alloc_can_skb(priv->netdev, (struct can_frame **)&cf); 1264 1265 if (!skb) { 1266 stats->rx_dropped++; 1267 return; 1268 } 1269 1270 shhwtstamps = skb_hwtstamps(skb); 1271 shhwtstamps->hwtstamp = hwtstamp; 1272 1273 cf->can_id = le32_to_cpu(cmd->rx_can.id); 1274 1275 if (flags & KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID) { 1276 cf->can_id &= CAN_EFF_MASK; 1277 cf->can_id |= CAN_EFF_FLAG; 1278 } else { 1279 cf->can_id &= CAN_SFF_MASK; 1280 } 1281 1282 if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN) 1283 kvaser_usb_can_rx_over_error(priv->netdev); 1284 1285 if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) { 1286 cf->len = can_fd_dlc2len(dlc); 1287 if (flags & KVASER_USB_HYDRA_CF_FLAG_BRS) 1288 cf->flags |= CANFD_BRS; 1289 if (flags & KVASER_USB_HYDRA_CF_FLAG_ESI) 1290 cf->flags |= CANFD_ESI; 1291 } else { 1292 cf->len = can_cc_dlc2len(dlc); 1293 } 1294 1295 if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) { 1296 cf->can_id |= CAN_RTR_FLAG; 1297 } else { 1298 memcpy(cf->data, cmd->rx_can.kcan_payload, cf->len); 1299 1300 stats->rx_bytes += cf->len; 1301 } 1302 stats->rx_packets++; 1303 1304 netif_rx(skb); 1305 } 1306 1307 static void kvaser_usb_hydra_handle_cmd_std(const struct kvaser_usb *dev, 1308 const struct kvaser_cmd *cmd) 1309 { 1310 switch (cmd->header.cmd_no) { 1311 case CMD_START_CHIP_RESP: 1312 kvaser_usb_hydra_start_chip_reply(dev, cmd); 1313 break; 1314 1315 case CMD_STOP_CHIP_RESP: 1316 kvaser_usb_hydra_stop_chip_reply(dev, cmd); 1317 break; 1318 1319 case CMD_FLUSH_QUEUE_RESP: 1320 kvaser_usb_hydra_flush_queue_reply(dev, cmd); 1321 break; 1322 1323 case CMD_CHIP_STATE_EVENT: 1324 kvaser_usb_hydra_state_event(dev, cmd); 1325 break; 1326 1327 case CMD_ERROR_EVENT: 1328 kvaser_usb_hydra_error_event(dev, cmd); 1329 break; 1330 1331 case CMD_TX_ACKNOWLEDGE: 1332 kvaser_usb_hydra_tx_acknowledge(dev, cmd); 1333 break; 1334 1335 case CMD_RX_MESSAGE: 1336 kvaser_usb_hydra_rx_msg_std(dev, cmd); 1337 break; 1338 1339 /* Ignored commands */ 1340 case CMD_SET_BUSPARAMS_RESP: 1341 case CMD_SET_BUSPARAMS_FD_RESP: 1342 break; 1343 1344 default: 1345 dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", 1346 cmd->header.cmd_no); 1347 break; 1348 } 1349 } 1350 1351 static void kvaser_usb_hydra_handle_cmd_ext(const struct kvaser_usb *dev, 1352 const struct kvaser_cmd_ext *cmd) 1353 { 1354 switch (cmd->cmd_no_ext) { 1355 case CMD_TX_ACKNOWLEDGE_FD: 1356 kvaser_usb_hydra_tx_acknowledge(dev, (struct kvaser_cmd *)cmd); 1357 break; 1358 1359 case CMD_RX_MESSAGE_FD: 1360 kvaser_usb_hydra_rx_msg_ext(dev, cmd); 1361 break; 1362 1363 default: 1364 dev_warn(&dev->intf->dev, "Unhandled extended command (%d)\n", 1365 cmd->header.cmd_no); 1366 break; 1367 } 1368 } 1369 1370 static void kvaser_usb_hydra_handle_cmd(const struct kvaser_usb *dev, 1371 const struct kvaser_cmd *cmd) 1372 { 1373 if (cmd->header.cmd_no == CMD_EXTENDED) 1374 kvaser_usb_hydra_handle_cmd_ext 1375 (dev, (struct kvaser_cmd_ext *)cmd); 1376 else 1377 kvaser_usb_hydra_handle_cmd_std(dev, cmd); 1378 } 1379 1380 static void * 1381 kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv, 1382 const struct sk_buff *skb, int *cmd_len, 1383 u16 transid) 1384 { 1385 struct kvaser_usb *dev = priv->dev; 1386 struct kvaser_cmd_ext *cmd; 1387 struct canfd_frame *cf = (struct canfd_frame *)skb->data; 1388 u8 dlc = can_fd_len2dlc(cf->len); 1389 u8 nbr_of_bytes = cf->len; 1390 u32 flags; 1391 u32 id; 1392 u32 kcan_id; 1393 u32 kcan_header; 1394 1395 cmd = kcalloc(1, sizeof(struct kvaser_cmd_ext), GFP_ATOMIC); 1396 if (!cmd) 1397 return NULL; 1398 1399 kvaser_usb_hydra_set_cmd_dest_he 1400 ((struct kvaser_cmd *)cmd, 1401 dev->card_data.hydra.channel_to_he[priv->channel]); 1402 kvaser_usb_hydra_set_cmd_transid((struct kvaser_cmd *)cmd, transid); 1403 1404 cmd->header.cmd_no = CMD_EXTENDED; 1405 cmd->cmd_no_ext = CMD_TX_CAN_MESSAGE_FD; 1406 1407 *cmd_len = ALIGN(sizeof(struct kvaser_cmd_ext) - 1408 sizeof(cmd->tx_can.kcan_payload) + nbr_of_bytes, 1409 8); 1410 1411 cmd->len = cpu_to_le16(*cmd_len); 1412 1413 cmd->tx_can.databytes = nbr_of_bytes; 1414 cmd->tx_can.dlc = dlc; 1415 1416 if (cf->can_id & CAN_EFF_FLAG) { 1417 id = cf->can_id & CAN_EFF_MASK; 1418 flags = KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID; 1419 kcan_id = (cf->can_id & CAN_EFF_MASK) | 1420 KVASER_USB_KCAN_DATA_IDE | KVASER_USB_KCAN_DATA_SRR; 1421 } else { 1422 id = cf->can_id & CAN_SFF_MASK; 1423 flags = 0; 1424 kcan_id = cf->can_id & CAN_SFF_MASK; 1425 } 1426 1427 if (cf->can_id & CAN_ERR_FLAG) 1428 flags |= KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME; 1429 1430 kcan_header = ((dlc << KVASER_USB_KCAN_DATA_DLC_SHIFT) & 1431 KVASER_USB_KCAN_DATA_DLC_MASK) | 1432 KVASER_USB_KCAN_DATA_AREQ | 1433 (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT ? 1434 KVASER_USB_KCAN_DATA_OSM : 0); 1435 1436 if (can_is_canfd_skb(skb)) { 1437 kcan_header |= KVASER_USB_KCAN_DATA_FDF | 1438 (cf->flags & CANFD_BRS ? 1439 KVASER_USB_KCAN_DATA_BRS : 0); 1440 } else { 1441 if (cf->can_id & CAN_RTR_FLAG) { 1442 kcan_id |= KVASER_USB_KCAN_DATA_RTR; 1443 cmd->tx_can.databytes = 0; 1444 flags |= KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME; 1445 } 1446 } 1447 1448 cmd->tx_can.kcan_id = cpu_to_le32(kcan_id); 1449 cmd->tx_can.id = cpu_to_le32(id); 1450 cmd->tx_can.flags = cpu_to_le32(flags); 1451 cmd->tx_can.kcan_header = cpu_to_le32(kcan_header); 1452 1453 memcpy(cmd->tx_can.kcan_payload, cf->data, nbr_of_bytes); 1454 1455 return cmd; 1456 } 1457 1458 static void * 1459 kvaser_usb_hydra_frame_to_cmd_std(const struct kvaser_usb_net_priv *priv, 1460 const struct sk_buff *skb, int *cmd_len, 1461 u16 transid) 1462 { 1463 struct kvaser_usb *dev = priv->dev; 1464 struct kvaser_cmd *cmd; 1465 struct can_frame *cf = (struct can_frame *)skb->data; 1466 u32 flags; 1467 u32 id; 1468 1469 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_ATOMIC); 1470 if (!cmd) 1471 return NULL; 1472 1473 kvaser_usb_hydra_set_cmd_dest_he 1474 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1475 kvaser_usb_hydra_set_cmd_transid(cmd, transid); 1476 1477 cmd->header.cmd_no = CMD_TX_CAN_MESSAGE; 1478 1479 *cmd_len = ALIGN(sizeof(struct kvaser_cmd), 8); 1480 1481 if (cf->can_id & CAN_EFF_FLAG) { 1482 id = (cf->can_id & CAN_EFF_MASK); 1483 id |= KVASER_USB_HYDRA_EXTENDED_FRAME_ID; 1484 } else { 1485 id = cf->can_id & CAN_SFF_MASK; 1486 } 1487 1488 cmd->tx_can.dlc = cf->len; 1489 1490 flags = (cf->can_id & CAN_EFF_FLAG ? 1491 KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID : 0); 1492 1493 if (cf->can_id & CAN_RTR_FLAG) 1494 flags |= KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME; 1495 1496 flags |= (cf->can_id & CAN_ERR_FLAG ? 1497 KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME : 0); 1498 1499 cmd->tx_can.id = cpu_to_le32(id); 1500 cmd->tx_can.flags = flags; 1501 1502 memcpy(cmd->tx_can.data, cf->data, cf->len); 1503 1504 return cmd; 1505 } 1506 1507 static int kvaser_usb_hydra_set_mode(struct net_device *netdev, 1508 enum can_mode mode) 1509 { 1510 int err = 0; 1511 1512 switch (mode) { 1513 case CAN_MODE_START: 1514 /* CAN controller automatically recovers from BUS_OFF */ 1515 break; 1516 default: 1517 err = -EOPNOTSUPP; 1518 } 1519 1520 return err; 1521 } 1522 1523 static int kvaser_usb_hydra_set_bittiming(struct net_device *netdev) 1524 { 1525 struct kvaser_cmd *cmd; 1526 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 1527 struct can_bittiming *bt = &priv->can.bittiming; 1528 struct kvaser_usb *dev = priv->dev; 1529 int tseg1 = bt->prop_seg + bt->phase_seg1; 1530 int tseg2 = bt->phase_seg2; 1531 int sjw = bt->sjw; 1532 int err; 1533 1534 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 1535 if (!cmd) 1536 return -ENOMEM; 1537 1538 cmd->header.cmd_no = CMD_SET_BUSPARAMS_REQ; 1539 cmd->set_busparams_req.bitrate = cpu_to_le32(bt->bitrate); 1540 cmd->set_busparams_req.sjw = (u8)sjw; 1541 cmd->set_busparams_req.tseg1 = (u8)tseg1; 1542 cmd->set_busparams_req.tseg2 = (u8)tseg2; 1543 cmd->set_busparams_req.nsamples = 1; 1544 1545 kvaser_usb_hydra_set_cmd_dest_he 1546 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1547 kvaser_usb_hydra_set_cmd_transid 1548 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1549 1550 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1551 1552 kfree(cmd); 1553 1554 return err; 1555 } 1556 1557 static int kvaser_usb_hydra_set_data_bittiming(struct net_device *netdev) 1558 { 1559 struct kvaser_cmd *cmd; 1560 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 1561 struct can_bittiming *dbt = &priv->can.data_bittiming; 1562 struct kvaser_usb *dev = priv->dev; 1563 int tseg1 = dbt->prop_seg + dbt->phase_seg1; 1564 int tseg2 = dbt->phase_seg2; 1565 int sjw = dbt->sjw; 1566 int err; 1567 1568 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 1569 if (!cmd) 1570 return -ENOMEM; 1571 1572 cmd->header.cmd_no = CMD_SET_BUSPARAMS_FD_REQ; 1573 cmd->set_busparams_req.bitrate_d = cpu_to_le32(dbt->bitrate); 1574 cmd->set_busparams_req.sjw_d = (u8)sjw; 1575 cmd->set_busparams_req.tseg1_d = (u8)tseg1; 1576 cmd->set_busparams_req.tseg2_d = (u8)tseg2; 1577 cmd->set_busparams_req.nsamples_d = 1; 1578 1579 if (priv->can.ctrlmode & CAN_CTRLMODE_FD) { 1580 if (priv->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) 1581 cmd->set_busparams_req.canfd_mode = 1582 KVASER_USB_HYDRA_BUS_MODE_NONISO; 1583 else 1584 cmd->set_busparams_req.canfd_mode = 1585 KVASER_USB_HYDRA_BUS_MODE_CANFD_ISO; 1586 } 1587 1588 kvaser_usb_hydra_set_cmd_dest_he 1589 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1590 kvaser_usb_hydra_set_cmd_transid 1591 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1592 1593 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1594 1595 kfree(cmd); 1596 1597 return err; 1598 } 1599 1600 static int kvaser_usb_hydra_get_berr_counter(const struct net_device *netdev, 1601 struct can_berr_counter *bec) 1602 { 1603 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 1604 int err; 1605 1606 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, 1607 CMD_GET_CHIP_STATE_REQ, 1608 priv->channel); 1609 if (err) 1610 return err; 1611 1612 *bec = priv->bec; 1613 1614 return 0; 1615 } 1616 1617 static int kvaser_usb_hydra_setup_endpoints(struct kvaser_usb *dev) 1618 { 1619 const struct usb_host_interface *iface_desc; 1620 struct usb_endpoint_descriptor *ep; 1621 int i; 1622 1623 iface_desc = dev->intf->cur_altsetting; 1624 1625 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 1626 ep = &iface_desc->endpoint[i].desc; 1627 1628 if (!dev->bulk_in && usb_endpoint_is_bulk_in(ep) && 1629 ep->bEndpointAddress == KVASER_USB_HYDRA_BULK_EP_IN_ADDR) 1630 dev->bulk_in = ep; 1631 1632 if (!dev->bulk_out && usb_endpoint_is_bulk_out(ep) && 1633 ep->bEndpointAddress == KVASER_USB_HYDRA_BULK_EP_OUT_ADDR) 1634 dev->bulk_out = ep; 1635 1636 if (dev->bulk_in && dev->bulk_out) 1637 return 0; 1638 } 1639 1640 return -ENODEV; 1641 } 1642 1643 static int kvaser_usb_hydra_init_card(struct kvaser_usb *dev) 1644 { 1645 int err; 1646 unsigned int i; 1647 struct kvaser_usb_dev_card_data_hydra *card_data = 1648 &dev->card_data.hydra; 1649 1650 card_data->transid = KVASER_USB_HYDRA_MIN_TRANSID; 1651 spin_lock_init(&card_data->transid_lock); 1652 1653 memset(card_data->usb_rx_leftover, 0, KVASER_USB_HYDRA_MAX_CMD_LEN); 1654 card_data->usb_rx_leftover_len = 0; 1655 spin_lock_init(&card_data->usb_rx_leftover_lock); 1656 1657 memset(card_data->channel_to_he, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL, 1658 sizeof(card_data->channel_to_he)); 1659 card_data->sysdbg_he = 0; 1660 1661 for (i = 0; i < KVASER_USB_MAX_NET_DEVICES; i++) { 1662 err = kvaser_usb_hydra_map_channel 1663 (dev, 1664 (KVASER_USB_HYDRA_TRANSID_CANHE | i), 1665 i, "CAN"); 1666 if (err) { 1667 dev_err(&dev->intf->dev, 1668 "CMD_MAP_CHANNEL_REQ failed for CAN%u\n", i); 1669 return err; 1670 } 1671 } 1672 1673 err = kvaser_usb_hydra_map_channel(dev, KVASER_USB_HYDRA_TRANSID_SYSDBG, 1674 0, "SYSDBG"); 1675 if (err) { 1676 dev_err(&dev->intf->dev, 1677 "CMD_MAP_CHANNEL_REQ failed for SYSDBG\n"); 1678 return err; 1679 } 1680 1681 return 0; 1682 } 1683 1684 static int kvaser_usb_hydra_get_software_info(struct kvaser_usb *dev) 1685 { 1686 struct kvaser_cmd cmd; 1687 int err; 1688 1689 err = kvaser_usb_hydra_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO_REQ, 1690 -1); 1691 if (err) 1692 return err; 1693 1694 memset(&cmd, 0, sizeof(struct kvaser_cmd)); 1695 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_RESP, &cmd); 1696 if (err) 1697 return err; 1698 1699 dev->max_tx_urbs = min_t(unsigned int, KVASER_USB_MAX_TX_URBS, 1700 le16_to_cpu(cmd.sw_info.max_outstanding_tx)); 1701 1702 return 0; 1703 } 1704 1705 static int kvaser_usb_hydra_get_software_details(struct kvaser_usb *dev) 1706 { 1707 struct kvaser_cmd *cmd; 1708 int err; 1709 u32 flags; 1710 struct kvaser_usb_dev_card_data *card_data = &dev->card_data; 1711 1712 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 1713 if (!cmd) 1714 return -ENOMEM; 1715 1716 cmd->header.cmd_no = CMD_GET_SOFTWARE_DETAILS_REQ; 1717 cmd->sw_detail_req.use_ext_cmd = 1; 1718 kvaser_usb_hydra_set_cmd_dest_he 1719 (cmd, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL); 1720 1721 kvaser_usb_hydra_set_cmd_transid 1722 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1723 1724 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1725 if (err) 1726 goto end; 1727 1728 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_SOFTWARE_DETAILS_RESP, 1729 cmd); 1730 if (err) 1731 goto end; 1732 1733 dev->fw_version = le32_to_cpu(cmd->sw_detail_res.sw_version); 1734 flags = le32_to_cpu(cmd->sw_detail_res.sw_flags); 1735 1736 if (flags & KVASER_USB_HYDRA_SW_FLAG_FW_BAD) { 1737 dev_err(&dev->intf->dev, 1738 "Bad firmware, device refuse to run!\n"); 1739 err = -EINVAL; 1740 goto end; 1741 } 1742 1743 if (flags & KVASER_USB_HYDRA_SW_FLAG_FW_BETA) 1744 dev_info(&dev->intf->dev, "Beta firmware in use\n"); 1745 1746 if (flags & KVASER_USB_HYDRA_SW_FLAG_EXT_CAP) 1747 card_data->capabilities |= KVASER_USB_CAP_EXT_CAP; 1748 1749 if (flags & KVASER_USB_HYDRA_SW_FLAG_EXT_CMD) 1750 card_data->capabilities |= KVASER_USB_HYDRA_CAP_EXT_CMD; 1751 1752 if (flags & KVASER_USB_HYDRA_SW_FLAG_CANFD) 1753 card_data->ctrlmode_supported |= CAN_CTRLMODE_FD; 1754 1755 if (flags & KVASER_USB_HYDRA_SW_FLAG_NONISO) 1756 card_data->ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO; 1757 1758 if (flags & KVASER_USB_HYDRA_SW_FLAG_FREQ_80M) 1759 dev->cfg = &kvaser_usb_hydra_dev_cfg_kcan; 1760 else if (flags & KVASER_USB_HYDRA_SW_FLAG_CAN_FREQ_80M) 1761 dev->cfg = &kvaser_usb_hydra_dev_cfg_rt; 1762 else 1763 dev->cfg = &kvaser_usb_hydra_dev_cfg_flexc; 1764 1765 end: 1766 kfree(cmd); 1767 1768 return err; 1769 } 1770 1771 static int kvaser_usb_hydra_get_card_info(struct kvaser_usb *dev) 1772 { 1773 struct kvaser_cmd cmd; 1774 int err; 1775 1776 err = kvaser_usb_hydra_send_simple_cmd(dev, CMD_GET_CARD_INFO_REQ, -1); 1777 if (err) 1778 return err; 1779 1780 memset(&cmd, 0, sizeof(struct kvaser_cmd)); 1781 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_CARD_INFO_RESP, &cmd); 1782 if (err) 1783 return err; 1784 1785 dev->nchannels = cmd.card_info.nchannels; 1786 if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES) 1787 return -EINVAL; 1788 1789 return 0; 1790 } 1791 1792 static int kvaser_usb_hydra_get_capabilities(struct kvaser_usb *dev) 1793 { 1794 int err; 1795 u16 status; 1796 1797 if (!(dev->card_data.capabilities & KVASER_USB_CAP_EXT_CAP)) { 1798 dev_info(&dev->intf->dev, 1799 "No extended capability support. Upgrade your device.\n"); 1800 return 0; 1801 } 1802 1803 err = kvaser_usb_hydra_get_single_capability 1804 (dev, 1805 KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE, 1806 &status); 1807 if (err) 1808 return err; 1809 if (status) 1810 dev_info(&dev->intf->dev, 1811 "KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE failed %u\n", 1812 status); 1813 1814 err = kvaser_usb_hydra_get_single_capability 1815 (dev, 1816 KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT, 1817 &status); 1818 if (err) 1819 return err; 1820 if (status) 1821 dev_info(&dev->intf->dev, 1822 "KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT failed %u\n", 1823 status); 1824 1825 err = kvaser_usb_hydra_get_single_capability 1826 (dev, KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT, 1827 &status); 1828 if (err) 1829 return err; 1830 if (status) 1831 dev_info(&dev->intf->dev, 1832 "KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT failed %u\n", 1833 status); 1834 1835 return 0; 1836 } 1837 1838 static int kvaser_usb_hydra_set_opt_mode(const struct kvaser_usb_net_priv *priv) 1839 { 1840 struct kvaser_usb *dev = priv->dev; 1841 struct kvaser_cmd *cmd; 1842 int err; 1843 1844 if ((priv->can.ctrlmode & 1845 (CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO)) == 1846 CAN_CTRLMODE_FD_NON_ISO) { 1847 netdev_warn(priv->netdev, 1848 "CTRLMODE_FD shall be on if CTRLMODE_FD_NON_ISO is on\n"); 1849 return -EINVAL; 1850 } 1851 1852 cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); 1853 if (!cmd) 1854 return -ENOMEM; 1855 1856 cmd->header.cmd_no = CMD_SET_DRIVERMODE_REQ; 1857 kvaser_usb_hydra_set_cmd_dest_he 1858 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1859 kvaser_usb_hydra_set_cmd_transid 1860 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1861 if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) 1862 cmd->set_ctrlmode.mode = KVASER_USB_HYDRA_CTRLMODE_LISTEN; 1863 else 1864 cmd->set_ctrlmode.mode = KVASER_USB_HYDRA_CTRLMODE_NORMAL; 1865 1866 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1867 kfree(cmd); 1868 1869 return err; 1870 } 1871 1872 static int kvaser_usb_hydra_start_chip(struct kvaser_usb_net_priv *priv) 1873 { 1874 int err; 1875 1876 init_completion(&priv->start_comp); 1877 1878 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_START_CHIP_REQ, 1879 priv->channel); 1880 if (err) 1881 return err; 1882 1883 if (!wait_for_completion_timeout(&priv->start_comp, 1884 msecs_to_jiffies(KVASER_USB_TIMEOUT))) 1885 return -ETIMEDOUT; 1886 1887 return 0; 1888 } 1889 1890 static int kvaser_usb_hydra_stop_chip(struct kvaser_usb_net_priv *priv) 1891 { 1892 int err; 1893 1894 init_completion(&priv->stop_comp); 1895 1896 /* Make sure we do not report invalid BUS_OFF from CMD_CHIP_STATE_EVENT 1897 * see comment in kvaser_usb_hydra_update_state() 1898 */ 1899 priv->can.state = CAN_STATE_STOPPED; 1900 1901 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_STOP_CHIP_REQ, 1902 priv->channel); 1903 if (err) 1904 return err; 1905 1906 if (!wait_for_completion_timeout(&priv->stop_comp, 1907 msecs_to_jiffies(KVASER_USB_TIMEOUT))) 1908 return -ETIMEDOUT; 1909 1910 return 0; 1911 } 1912 1913 static int kvaser_usb_hydra_flush_queue(struct kvaser_usb_net_priv *priv) 1914 { 1915 int err; 1916 1917 init_completion(&priv->flush_comp); 1918 1919 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_FLUSH_QUEUE, 1920 priv->channel); 1921 if (err) 1922 return err; 1923 1924 if (!wait_for_completion_timeout(&priv->flush_comp, 1925 msecs_to_jiffies(KVASER_USB_TIMEOUT))) 1926 return -ETIMEDOUT; 1927 1928 return 0; 1929 } 1930 1931 /* A single extended hydra command can be transmitted in multiple transfers 1932 * We have to buffer partial hydra commands, and handle them on next callback. 1933 */ 1934 static void kvaser_usb_hydra_read_bulk_callback(struct kvaser_usb *dev, 1935 void *buf, int len) 1936 { 1937 unsigned long irq_flags; 1938 struct kvaser_cmd *cmd; 1939 int pos = 0; 1940 size_t cmd_len; 1941 struct kvaser_usb_dev_card_data_hydra *card_data = 1942 &dev->card_data.hydra; 1943 int usb_rx_leftover_len; 1944 spinlock_t *usb_rx_leftover_lock = &card_data->usb_rx_leftover_lock; 1945 1946 spin_lock_irqsave(usb_rx_leftover_lock, irq_flags); 1947 usb_rx_leftover_len = card_data->usb_rx_leftover_len; 1948 if (usb_rx_leftover_len) { 1949 int remaining_bytes; 1950 1951 cmd = (struct kvaser_cmd *)card_data->usb_rx_leftover; 1952 1953 cmd_len = kvaser_usb_hydra_cmd_size(cmd); 1954 1955 remaining_bytes = min_t(unsigned int, len, 1956 cmd_len - usb_rx_leftover_len); 1957 /* Make sure we do not overflow usb_rx_leftover */ 1958 if (remaining_bytes + usb_rx_leftover_len > 1959 KVASER_USB_HYDRA_MAX_CMD_LEN) { 1960 dev_err(&dev->intf->dev, "Format error\n"); 1961 spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); 1962 return; 1963 } 1964 1965 memcpy(card_data->usb_rx_leftover + usb_rx_leftover_len, buf, 1966 remaining_bytes); 1967 pos += remaining_bytes; 1968 1969 if (remaining_bytes + usb_rx_leftover_len == cmd_len) { 1970 kvaser_usb_hydra_handle_cmd(dev, cmd); 1971 usb_rx_leftover_len = 0; 1972 } else { 1973 /* Command still not complete */ 1974 usb_rx_leftover_len += remaining_bytes; 1975 } 1976 card_data->usb_rx_leftover_len = usb_rx_leftover_len; 1977 } 1978 spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); 1979 1980 while (pos < len) { 1981 cmd = buf + pos; 1982 1983 cmd_len = kvaser_usb_hydra_cmd_size(cmd); 1984 1985 if (pos + cmd_len > len) { 1986 /* We got first part of a command */ 1987 int leftover_bytes; 1988 1989 leftover_bytes = len - pos; 1990 /* Make sure we do not overflow usb_rx_leftover */ 1991 if (leftover_bytes > KVASER_USB_HYDRA_MAX_CMD_LEN) { 1992 dev_err(&dev->intf->dev, "Format error\n"); 1993 return; 1994 } 1995 spin_lock_irqsave(usb_rx_leftover_lock, irq_flags); 1996 memcpy(card_data->usb_rx_leftover, buf + pos, 1997 leftover_bytes); 1998 card_data->usb_rx_leftover_len = leftover_bytes; 1999 spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); 2000 break; 2001 } 2002 2003 kvaser_usb_hydra_handle_cmd(dev, cmd); 2004 pos += cmd_len; 2005 } 2006 } 2007 2008 static void * 2009 kvaser_usb_hydra_frame_to_cmd(const struct kvaser_usb_net_priv *priv, 2010 const struct sk_buff *skb, int *cmd_len, 2011 u16 transid) 2012 { 2013 void *buf; 2014 2015 if (priv->dev->card_data.capabilities & KVASER_USB_HYDRA_CAP_EXT_CMD) 2016 buf = kvaser_usb_hydra_frame_to_cmd_ext(priv, skb, cmd_len, 2017 transid); 2018 else 2019 buf = kvaser_usb_hydra_frame_to_cmd_std(priv, skb, cmd_len, 2020 transid); 2021 2022 return buf; 2023 } 2024 2025 const struct kvaser_usb_dev_ops kvaser_usb_hydra_dev_ops = { 2026 .dev_set_mode = kvaser_usb_hydra_set_mode, 2027 .dev_set_bittiming = kvaser_usb_hydra_set_bittiming, 2028 .dev_set_data_bittiming = kvaser_usb_hydra_set_data_bittiming, 2029 .dev_get_berr_counter = kvaser_usb_hydra_get_berr_counter, 2030 .dev_setup_endpoints = kvaser_usb_hydra_setup_endpoints, 2031 .dev_init_card = kvaser_usb_hydra_init_card, 2032 .dev_get_software_info = kvaser_usb_hydra_get_software_info, 2033 .dev_get_software_details = kvaser_usb_hydra_get_software_details, 2034 .dev_get_card_info = kvaser_usb_hydra_get_card_info, 2035 .dev_get_capabilities = kvaser_usb_hydra_get_capabilities, 2036 .dev_set_opt_mode = kvaser_usb_hydra_set_opt_mode, 2037 .dev_start_chip = kvaser_usb_hydra_start_chip, 2038 .dev_stop_chip = kvaser_usb_hydra_stop_chip, 2039 .dev_reset_chip = NULL, 2040 .dev_flush_queue = kvaser_usb_hydra_flush_queue, 2041 .dev_read_bulk_callback = kvaser_usb_hydra_read_bulk_callback, 2042 .dev_frame_to_cmd = kvaser_usb_hydra_frame_to_cmd, 2043 }; 2044 2045 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_kcan = { 2046 .clock = { 2047 .freq = 80 * MEGA /* Hz */, 2048 }, 2049 .timestamp_freq = 80, 2050 .bittiming_const = &kvaser_usb_hydra_kcan_bittiming_c, 2051 .data_bittiming_const = &kvaser_usb_hydra_kcan_bittiming_c, 2052 }; 2053 2054 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_flexc = { 2055 .clock = { 2056 .freq = 24 * MEGA /* Hz */, 2057 }, 2058 .timestamp_freq = 1, 2059 .bittiming_const = &kvaser_usb_flexc_bittiming_const, 2060 }; 2061 2062 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_rt = { 2063 .clock = { 2064 .freq = 80 * MEGA /* Hz */, 2065 }, 2066 .timestamp_freq = 24, 2067 .bittiming_const = &kvaser_usb_hydra_rt_bittiming_c, 2068 .data_bittiming_const = &kvaser_usb_hydra_rtd_bittiming_c, 2069 }; 2070