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 = kzalloc(sizeof(*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 = kzalloc(sizeof(*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 = kzalloc(sizeof(*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 = kzalloc(sizeof(*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->can_id |= CAN_ERR_CNT; 922 cf->data[6] = bec->txerr; 923 cf->data[7] = bec->rxerr; 924 } 925 926 netif_rx(skb); 927 } 928 929 static void kvaser_usb_hydra_state_event(const struct kvaser_usb *dev, 930 const struct kvaser_cmd *cmd) 931 { 932 struct kvaser_usb_net_priv *priv; 933 struct can_berr_counter bec; 934 u8 bus_status; 935 936 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 937 if (!priv) 938 return; 939 940 bus_status = cmd->chip_state_event.bus_status; 941 bec.txerr = cmd->chip_state_event.tx_err_counter; 942 bec.rxerr = cmd->chip_state_event.rx_err_counter; 943 944 kvaser_usb_hydra_update_state(priv, bus_status, &bec); 945 priv->bec.txerr = bec.txerr; 946 priv->bec.rxerr = bec.rxerr; 947 } 948 949 static void kvaser_usb_hydra_error_event_parameter(const struct kvaser_usb *dev, 950 const struct kvaser_cmd *cmd) 951 { 952 /* info1 will contain the offending cmd_no */ 953 switch (le16_to_cpu(cmd->error_event.info1)) { 954 case CMD_START_CHIP_REQ: 955 dev_warn(&dev->intf->dev, 956 "CMD_START_CHIP_REQ error in parameter\n"); 957 break; 958 959 case CMD_STOP_CHIP_REQ: 960 dev_warn(&dev->intf->dev, 961 "CMD_STOP_CHIP_REQ error in parameter\n"); 962 break; 963 964 case CMD_FLUSH_QUEUE: 965 dev_warn(&dev->intf->dev, 966 "CMD_FLUSH_QUEUE error in parameter\n"); 967 break; 968 969 case CMD_SET_BUSPARAMS_REQ: 970 dev_warn(&dev->intf->dev, 971 "Set bittiming failed. Error in parameter\n"); 972 break; 973 974 case CMD_SET_BUSPARAMS_FD_REQ: 975 dev_warn(&dev->intf->dev, 976 "Set data bittiming failed. Error in parameter\n"); 977 break; 978 979 default: 980 dev_warn(&dev->intf->dev, 981 "Unhandled parameter error event cmd_no (%u)\n", 982 le16_to_cpu(cmd->error_event.info1)); 983 break; 984 } 985 } 986 987 static void kvaser_usb_hydra_error_event(const struct kvaser_usb *dev, 988 const struct kvaser_cmd *cmd) 989 { 990 switch (cmd->error_event.error_code) { 991 case KVASER_USB_HYDRA_ERROR_EVENT_PARAM: 992 kvaser_usb_hydra_error_event_parameter(dev, cmd); 993 break; 994 995 case KVASER_USB_HYDRA_ERROR_EVENT_CAN: 996 /* Wrong channel mapping?! This should never happen! 997 * info1 will contain the offending cmd_no 998 */ 999 dev_err(&dev->intf->dev, 1000 "Received CAN error event for cmd_no (%u)\n", 1001 le16_to_cpu(cmd->error_event.info1)); 1002 break; 1003 1004 default: 1005 dev_warn(&dev->intf->dev, 1006 "Unhandled error event (%d)\n", 1007 cmd->error_event.error_code); 1008 break; 1009 } 1010 } 1011 1012 static void 1013 kvaser_usb_hydra_error_frame(struct kvaser_usb_net_priv *priv, 1014 const struct kvaser_err_frame_data *err_frame_data, 1015 ktime_t hwtstamp) 1016 { 1017 struct net_device *netdev = priv->netdev; 1018 struct net_device_stats *stats = &netdev->stats; 1019 struct can_frame *cf; 1020 struct sk_buff *skb; 1021 struct skb_shared_hwtstamps *shhwtstamps; 1022 struct can_berr_counter bec; 1023 enum can_state new_state, old_state; 1024 u8 bus_status; 1025 1026 priv->can.can_stats.bus_error++; 1027 stats->rx_errors++; 1028 1029 bus_status = err_frame_data->bus_status; 1030 bec.txerr = err_frame_data->tx_err_counter; 1031 bec.rxerr = err_frame_data->rx_err_counter; 1032 1033 old_state = priv->can.state; 1034 kvaser_usb_hydra_bus_status_to_can_state(priv, bus_status, &bec, 1035 &new_state); 1036 1037 skb = alloc_can_err_skb(netdev, &cf); 1038 1039 if (new_state != old_state) { 1040 if (skb) { 1041 enum can_state tx_state, rx_state; 1042 1043 tx_state = (bec.txerr >= bec.rxerr) ? 1044 new_state : CAN_STATE_ERROR_ACTIVE; 1045 rx_state = (bec.txerr <= bec.rxerr) ? 1046 new_state : CAN_STATE_ERROR_ACTIVE; 1047 1048 can_change_state(netdev, cf, tx_state, rx_state); 1049 1050 if (priv->can.restart_ms && 1051 old_state >= CAN_STATE_BUS_OFF && 1052 new_state < CAN_STATE_BUS_OFF) 1053 cf->can_id |= CAN_ERR_RESTARTED; 1054 } 1055 1056 if (new_state == CAN_STATE_BUS_OFF) { 1057 if (!priv->can.restart_ms) 1058 kvaser_usb_hydra_send_simple_cmd_async 1059 (priv, CMD_STOP_CHIP_REQ); 1060 1061 can_bus_off(netdev); 1062 } 1063 } 1064 1065 if (!skb) { 1066 stats->rx_dropped++; 1067 netdev_warn(netdev, "No memory left for err_skb\n"); 1068 return; 1069 } 1070 1071 shhwtstamps = skb_hwtstamps(skb); 1072 shhwtstamps->hwtstamp = hwtstamp; 1073 1074 cf->can_id |= CAN_ERR_BUSERROR; 1075 if (new_state != CAN_STATE_BUS_OFF) { 1076 cf->can_id |= CAN_ERR_CNT; 1077 cf->data[6] = bec.txerr; 1078 cf->data[7] = bec.rxerr; 1079 } 1080 1081 netif_rx(skb); 1082 1083 priv->bec.txerr = bec.txerr; 1084 priv->bec.rxerr = bec.rxerr; 1085 } 1086 1087 static void kvaser_usb_hydra_one_shot_fail(struct kvaser_usb_net_priv *priv, 1088 const struct kvaser_cmd_ext *cmd) 1089 { 1090 struct net_device *netdev = priv->netdev; 1091 struct net_device_stats *stats = &netdev->stats; 1092 struct can_frame *cf; 1093 struct sk_buff *skb; 1094 u32 flags; 1095 1096 skb = alloc_can_err_skb(netdev, &cf); 1097 if (!skb) { 1098 stats->rx_dropped++; 1099 netdev_warn(netdev, "No memory left for err_skb\n"); 1100 return; 1101 } 1102 1103 cf->can_id |= CAN_ERR_BUSERROR; 1104 flags = le32_to_cpu(cmd->tx_ack.flags); 1105 1106 if (flags & KVASER_USB_HYDRA_CF_FLAG_OSM_NACK) 1107 cf->can_id |= CAN_ERR_ACK; 1108 if (flags & KVASER_USB_HYDRA_CF_FLAG_ABL) { 1109 cf->can_id |= CAN_ERR_LOSTARB; 1110 priv->can.can_stats.arbitration_lost++; 1111 } 1112 1113 stats->tx_errors++; 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 unsigned int len; 1124 bool one_shot_fail = false; 1125 bool is_err_frame = false; 1126 u16 transid = kvaser_usb_hydra_get_cmd_transid(cmd); 1127 1128 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 1129 if (!priv) 1130 return; 1131 1132 if (!netif_device_present(priv->netdev)) 1133 return; 1134 1135 if (cmd->header.cmd_no == CMD_EXTENDED) { 1136 struct kvaser_cmd_ext *cmd_ext = (struct kvaser_cmd_ext *)cmd; 1137 u32 flags = le32_to_cpu(cmd_ext->tx_ack.flags); 1138 1139 if (flags & (KVASER_USB_HYDRA_CF_FLAG_OSM_NACK | 1140 KVASER_USB_HYDRA_CF_FLAG_ABL)) { 1141 kvaser_usb_hydra_one_shot_fail(priv, cmd_ext); 1142 one_shot_fail = true; 1143 } 1144 1145 is_err_frame = flags & KVASER_USB_HYDRA_CF_FLAG_TX_ACK && 1146 flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME; 1147 } 1148 1149 context = &priv->tx_contexts[transid % dev->max_tx_urbs]; 1150 1151 spin_lock_irqsave(&priv->tx_contexts_lock, irq_flags); 1152 1153 len = can_get_echo_skb(priv->netdev, context->echo_index, NULL); 1154 context->echo_index = dev->max_tx_urbs; 1155 --priv->active_tx_contexts; 1156 netif_wake_queue(priv->netdev); 1157 1158 spin_unlock_irqrestore(&priv->tx_contexts_lock, irq_flags); 1159 1160 if (!one_shot_fail && !is_err_frame) { 1161 struct net_device_stats *stats = &priv->netdev->stats; 1162 1163 stats->tx_packets++; 1164 stats->tx_bytes += len; 1165 } 1166 } 1167 1168 static void kvaser_usb_hydra_rx_msg_std(const struct kvaser_usb *dev, 1169 const struct kvaser_cmd *cmd) 1170 { 1171 struct kvaser_usb_net_priv *priv = NULL; 1172 struct can_frame *cf; 1173 struct sk_buff *skb; 1174 struct skb_shared_hwtstamps *shhwtstamps; 1175 struct net_device_stats *stats; 1176 u8 flags; 1177 ktime_t hwtstamp; 1178 1179 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); 1180 if (!priv) 1181 return; 1182 1183 stats = &priv->netdev->stats; 1184 1185 flags = cmd->rx_can.flags; 1186 hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, cmd); 1187 1188 if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) { 1189 kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data, 1190 hwtstamp); 1191 return; 1192 } 1193 1194 skb = alloc_can_skb(priv->netdev, &cf); 1195 if (!skb) { 1196 stats->rx_dropped++; 1197 return; 1198 } 1199 1200 shhwtstamps = skb_hwtstamps(skb); 1201 shhwtstamps->hwtstamp = hwtstamp; 1202 1203 cf->can_id = le32_to_cpu(cmd->rx_can.id); 1204 1205 if (cf->can_id & KVASER_USB_HYDRA_EXTENDED_FRAME_ID) { 1206 cf->can_id &= CAN_EFF_MASK; 1207 cf->can_id |= CAN_EFF_FLAG; 1208 } else { 1209 cf->can_id &= CAN_SFF_MASK; 1210 } 1211 1212 if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN) 1213 kvaser_usb_can_rx_over_error(priv->netdev); 1214 1215 cf->len = can_cc_dlc2len(cmd->rx_can.dlc); 1216 1217 if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) { 1218 cf->can_id |= CAN_RTR_FLAG; 1219 } else { 1220 memcpy(cf->data, cmd->rx_can.data, cf->len); 1221 1222 stats->rx_bytes += cf->len; 1223 } 1224 stats->rx_packets++; 1225 1226 netif_rx(skb); 1227 } 1228 1229 static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev, 1230 const struct kvaser_cmd_ext *cmd) 1231 { 1232 struct kvaser_cmd *std_cmd = (struct kvaser_cmd *)cmd; 1233 struct kvaser_usb_net_priv *priv; 1234 struct canfd_frame *cf; 1235 struct sk_buff *skb; 1236 struct skb_shared_hwtstamps *shhwtstamps; 1237 struct net_device_stats *stats; 1238 u32 flags; 1239 u8 dlc; 1240 u32 kcan_header; 1241 ktime_t hwtstamp; 1242 1243 priv = kvaser_usb_hydra_net_priv_from_cmd(dev, std_cmd); 1244 if (!priv) 1245 return; 1246 1247 stats = &priv->netdev->stats; 1248 1249 kcan_header = le32_to_cpu(cmd->rx_can.kcan_header); 1250 dlc = (kcan_header & KVASER_USB_KCAN_DATA_DLC_MASK) >> 1251 KVASER_USB_KCAN_DATA_DLC_SHIFT; 1252 1253 flags = le32_to_cpu(cmd->rx_can.flags); 1254 hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, std_cmd); 1255 1256 if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) { 1257 kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data, 1258 hwtstamp); 1259 return; 1260 } 1261 1262 if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) 1263 skb = alloc_canfd_skb(priv->netdev, &cf); 1264 else 1265 skb = alloc_can_skb(priv->netdev, (struct can_frame **)&cf); 1266 1267 if (!skb) { 1268 stats->rx_dropped++; 1269 return; 1270 } 1271 1272 shhwtstamps = skb_hwtstamps(skb); 1273 shhwtstamps->hwtstamp = hwtstamp; 1274 1275 cf->can_id = le32_to_cpu(cmd->rx_can.id); 1276 1277 if (flags & KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID) { 1278 cf->can_id &= CAN_EFF_MASK; 1279 cf->can_id |= CAN_EFF_FLAG; 1280 } else { 1281 cf->can_id &= CAN_SFF_MASK; 1282 } 1283 1284 if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN) 1285 kvaser_usb_can_rx_over_error(priv->netdev); 1286 1287 if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) { 1288 cf->len = can_fd_dlc2len(dlc); 1289 if (flags & KVASER_USB_HYDRA_CF_FLAG_BRS) 1290 cf->flags |= CANFD_BRS; 1291 if (flags & KVASER_USB_HYDRA_CF_FLAG_ESI) 1292 cf->flags |= CANFD_ESI; 1293 } else { 1294 cf->len = can_cc_dlc2len(dlc); 1295 } 1296 1297 if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) { 1298 cf->can_id |= CAN_RTR_FLAG; 1299 } else { 1300 memcpy(cf->data, cmd->rx_can.kcan_payload, cf->len); 1301 1302 stats->rx_bytes += cf->len; 1303 } 1304 stats->rx_packets++; 1305 1306 netif_rx(skb); 1307 } 1308 1309 static void kvaser_usb_hydra_handle_cmd_std(const struct kvaser_usb *dev, 1310 const struct kvaser_cmd *cmd) 1311 { 1312 switch (cmd->header.cmd_no) { 1313 case CMD_START_CHIP_RESP: 1314 kvaser_usb_hydra_start_chip_reply(dev, cmd); 1315 break; 1316 1317 case CMD_STOP_CHIP_RESP: 1318 kvaser_usb_hydra_stop_chip_reply(dev, cmd); 1319 break; 1320 1321 case CMD_FLUSH_QUEUE_RESP: 1322 kvaser_usb_hydra_flush_queue_reply(dev, cmd); 1323 break; 1324 1325 case CMD_CHIP_STATE_EVENT: 1326 kvaser_usb_hydra_state_event(dev, cmd); 1327 break; 1328 1329 case CMD_ERROR_EVENT: 1330 kvaser_usb_hydra_error_event(dev, cmd); 1331 break; 1332 1333 case CMD_TX_ACKNOWLEDGE: 1334 kvaser_usb_hydra_tx_acknowledge(dev, cmd); 1335 break; 1336 1337 case CMD_RX_MESSAGE: 1338 kvaser_usb_hydra_rx_msg_std(dev, cmd); 1339 break; 1340 1341 /* Ignored commands */ 1342 case CMD_SET_BUSPARAMS_RESP: 1343 case CMD_SET_BUSPARAMS_FD_RESP: 1344 break; 1345 1346 default: 1347 dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", 1348 cmd->header.cmd_no); 1349 break; 1350 } 1351 } 1352 1353 static void kvaser_usb_hydra_handle_cmd_ext(const struct kvaser_usb *dev, 1354 const struct kvaser_cmd_ext *cmd) 1355 { 1356 switch (cmd->cmd_no_ext) { 1357 case CMD_TX_ACKNOWLEDGE_FD: 1358 kvaser_usb_hydra_tx_acknowledge(dev, (struct kvaser_cmd *)cmd); 1359 break; 1360 1361 case CMD_RX_MESSAGE_FD: 1362 kvaser_usb_hydra_rx_msg_ext(dev, cmd); 1363 break; 1364 1365 default: 1366 dev_warn(&dev->intf->dev, "Unhandled extended command (%d)\n", 1367 cmd->header.cmd_no); 1368 break; 1369 } 1370 } 1371 1372 static void kvaser_usb_hydra_handle_cmd(const struct kvaser_usb *dev, 1373 const struct kvaser_cmd *cmd) 1374 { 1375 if (cmd->header.cmd_no == CMD_EXTENDED) 1376 kvaser_usb_hydra_handle_cmd_ext 1377 (dev, (struct kvaser_cmd_ext *)cmd); 1378 else 1379 kvaser_usb_hydra_handle_cmd_std(dev, cmd); 1380 } 1381 1382 static void * 1383 kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv, 1384 const struct sk_buff *skb, int *cmd_len, 1385 u16 transid) 1386 { 1387 struct kvaser_usb *dev = priv->dev; 1388 struct kvaser_cmd_ext *cmd; 1389 struct canfd_frame *cf = (struct canfd_frame *)skb->data; 1390 u8 dlc = can_fd_len2dlc(cf->len); 1391 u8 nbr_of_bytes = cf->len; 1392 u32 flags; 1393 u32 id; 1394 u32 kcan_id; 1395 u32 kcan_header; 1396 1397 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); 1398 if (!cmd) 1399 return NULL; 1400 1401 kvaser_usb_hydra_set_cmd_dest_he 1402 ((struct kvaser_cmd *)cmd, 1403 dev->card_data.hydra.channel_to_he[priv->channel]); 1404 kvaser_usb_hydra_set_cmd_transid((struct kvaser_cmd *)cmd, transid); 1405 1406 cmd->header.cmd_no = CMD_EXTENDED; 1407 cmd->cmd_no_ext = CMD_TX_CAN_MESSAGE_FD; 1408 1409 *cmd_len = ALIGN(sizeof(struct kvaser_cmd_ext) - 1410 sizeof(cmd->tx_can.kcan_payload) + nbr_of_bytes, 1411 8); 1412 1413 cmd->len = cpu_to_le16(*cmd_len); 1414 1415 cmd->tx_can.databytes = nbr_of_bytes; 1416 cmd->tx_can.dlc = dlc; 1417 1418 if (cf->can_id & CAN_EFF_FLAG) { 1419 id = cf->can_id & CAN_EFF_MASK; 1420 flags = KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID; 1421 kcan_id = (cf->can_id & CAN_EFF_MASK) | 1422 KVASER_USB_KCAN_DATA_IDE | KVASER_USB_KCAN_DATA_SRR; 1423 } else { 1424 id = cf->can_id & CAN_SFF_MASK; 1425 flags = 0; 1426 kcan_id = cf->can_id & CAN_SFF_MASK; 1427 } 1428 1429 if (cf->can_id & CAN_ERR_FLAG) 1430 flags |= KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME; 1431 1432 kcan_header = ((dlc << KVASER_USB_KCAN_DATA_DLC_SHIFT) & 1433 KVASER_USB_KCAN_DATA_DLC_MASK) | 1434 KVASER_USB_KCAN_DATA_AREQ | 1435 (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT ? 1436 KVASER_USB_KCAN_DATA_OSM : 0); 1437 1438 if (can_is_canfd_skb(skb)) { 1439 kcan_header |= KVASER_USB_KCAN_DATA_FDF | 1440 (cf->flags & CANFD_BRS ? 1441 KVASER_USB_KCAN_DATA_BRS : 0); 1442 } else { 1443 if (cf->can_id & CAN_RTR_FLAG) { 1444 kcan_id |= KVASER_USB_KCAN_DATA_RTR; 1445 cmd->tx_can.databytes = 0; 1446 flags |= KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME; 1447 } 1448 } 1449 1450 cmd->tx_can.kcan_id = cpu_to_le32(kcan_id); 1451 cmd->tx_can.id = cpu_to_le32(id); 1452 cmd->tx_can.flags = cpu_to_le32(flags); 1453 cmd->tx_can.kcan_header = cpu_to_le32(kcan_header); 1454 1455 memcpy(cmd->tx_can.kcan_payload, cf->data, nbr_of_bytes); 1456 1457 return cmd; 1458 } 1459 1460 static void * 1461 kvaser_usb_hydra_frame_to_cmd_std(const struct kvaser_usb_net_priv *priv, 1462 const struct sk_buff *skb, int *cmd_len, 1463 u16 transid) 1464 { 1465 struct kvaser_usb *dev = priv->dev; 1466 struct kvaser_cmd *cmd; 1467 struct can_frame *cf = (struct can_frame *)skb->data; 1468 u32 flags; 1469 u32 id; 1470 1471 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); 1472 if (!cmd) 1473 return NULL; 1474 1475 kvaser_usb_hydra_set_cmd_dest_he 1476 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1477 kvaser_usb_hydra_set_cmd_transid(cmd, transid); 1478 1479 cmd->header.cmd_no = CMD_TX_CAN_MESSAGE; 1480 1481 *cmd_len = ALIGN(sizeof(struct kvaser_cmd), 8); 1482 1483 if (cf->can_id & CAN_EFF_FLAG) { 1484 id = (cf->can_id & CAN_EFF_MASK); 1485 id |= KVASER_USB_HYDRA_EXTENDED_FRAME_ID; 1486 } else { 1487 id = cf->can_id & CAN_SFF_MASK; 1488 } 1489 1490 cmd->tx_can.dlc = cf->len; 1491 1492 flags = (cf->can_id & CAN_EFF_FLAG ? 1493 KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID : 0); 1494 1495 if (cf->can_id & CAN_RTR_FLAG) 1496 flags |= KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME; 1497 1498 flags |= (cf->can_id & CAN_ERR_FLAG ? 1499 KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME : 0); 1500 1501 cmd->tx_can.id = cpu_to_le32(id); 1502 cmd->tx_can.flags = flags; 1503 1504 memcpy(cmd->tx_can.data, cf->data, cf->len); 1505 1506 return cmd; 1507 } 1508 1509 static int kvaser_usb_hydra_set_mode(struct net_device *netdev, 1510 enum can_mode mode) 1511 { 1512 int err = 0; 1513 1514 switch (mode) { 1515 case CAN_MODE_START: 1516 /* CAN controller automatically recovers from BUS_OFF */ 1517 break; 1518 default: 1519 err = -EOPNOTSUPP; 1520 } 1521 1522 return err; 1523 } 1524 1525 static int kvaser_usb_hydra_set_bittiming(struct net_device *netdev) 1526 { 1527 struct kvaser_cmd *cmd; 1528 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 1529 struct can_bittiming *bt = &priv->can.bittiming; 1530 struct kvaser_usb *dev = priv->dev; 1531 int tseg1 = bt->prop_seg + bt->phase_seg1; 1532 int tseg2 = bt->phase_seg2; 1533 int sjw = bt->sjw; 1534 int err; 1535 1536 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 1537 if (!cmd) 1538 return -ENOMEM; 1539 1540 cmd->header.cmd_no = CMD_SET_BUSPARAMS_REQ; 1541 cmd->set_busparams_req.bitrate = cpu_to_le32(bt->bitrate); 1542 cmd->set_busparams_req.sjw = (u8)sjw; 1543 cmd->set_busparams_req.tseg1 = (u8)tseg1; 1544 cmd->set_busparams_req.tseg2 = (u8)tseg2; 1545 cmd->set_busparams_req.nsamples = 1; 1546 1547 kvaser_usb_hydra_set_cmd_dest_he 1548 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1549 kvaser_usb_hydra_set_cmd_transid 1550 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1551 1552 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1553 1554 kfree(cmd); 1555 1556 return err; 1557 } 1558 1559 static int kvaser_usb_hydra_set_data_bittiming(struct net_device *netdev) 1560 { 1561 struct kvaser_cmd *cmd; 1562 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 1563 struct can_bittiming *dbt = &priv->can.data_bittiming; 1564 struct kvaser_usb *dev = priv->dev; 1565 int tseg1 = dbt->prop_seg + dbt->phase_seg1; 1566 int tseg2 = dbt->phase_seg2; 1567 int sjw = dbt->sjw; 1568 int err; 1569 1570 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 1571 if (!cmd) 1572 return -ENOMEM; 1573 1574 cmd->header.cmd_no = CMD_SET_BUSPARAMS_FD_REQ; 1575 cmd->set_busparams_req.bitrate_d = cpu_to_le32(dbt->bitrate); 1576 cmd->set_busparams_req.sjw_d = (u8)sjw; 1577 cmd->set_busparams_req.tseg1_d = (u8)tseg1; 1578 cmd->set_busparams_req.tseg2_d = (u8)tseg2; 1579 cmd->set_busparams_req.nsamples_d = 1; 1580 1581 if (priv->can.ctrlmode & CAN_CTRLMODE_FD) { 1582 if (priv->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) 1583 cmd->set_busparams_req.canfd_mode = 1584 KVASER_USB_HYDRA_BUS_MODE_NONISO; 1585 else 1586 cmd->set_busparams_req.canfd_mode = 1587 KVASER_USB_HYDRA_BUS_MODE_CANFD_ISO; 1588 } 1589 1590 kvaser_usb_hydra_set_cmd_dest_he 1591 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1592 kvaser_usb_hydra_set_cmd_transid 1593 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1594 1595 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1596 1597 kfree(cmd); 1598 1599 return err; 1600 } 1601 1602 static int kvaser_usb_hydra_get_berr_counter(const struct net_device *netdev, 1603 struct can_berr_counter *bec) 1604 { 1605 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 1606 int err; 1607 1608 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, 1609 CMD_GET_CHIP_STATE_REQ, 1610 priv->channel); 1611 if (err) 1612 return err; 1613 1614 *bec = priv->bec; 1615 1616 return 0; 1617 } 1618 1619 static int kvaser_usb_hydra_setup_endpoints(struct kvaser_usb *dev) 1620 { 1621 const struct usb_host_interface *iface_desc; 1622 struct usb_endpoint_descriptor *ep; 1623 int i; 1624 1625 iface_desc = dev->intf->cur_altsetting; 1626 1627 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 1628 ep = &iface_desc->endpoint[i].desc; 1629 1630 if (!dev->bulk_in && usb_endpoint_is_bulk_in(ep) && 1631 ep->bEndpointAddress == KVASER_USB_HYDRA_BULK_EP_IN_ADDR) 1632 dev->bulk_in = ep; 1633 1634 if (!dev->bulk_out && usb_endpoint_is_bulk_out(ep) && 1635 ep->bEndpointAddress == KVASER_USB_HYDRA_BULK_EP_OUT_ADDR) 1636 dev->bulk_out = ep; 1637 1638 if (dev->bulk_in && dev->bulk_out) 1639 return 0; 1640 } 1641 1642 return -ENODEV; 1643 } 1644 1645 static int kvaser_usb_hydra_init_card(struct kvaser_usb *dev) 1646 { 1647 int err; 1648 unsigned int i; 1649 struct kvaser_usb_dev_card_data_hydra *card_data = 1650 &dev->card_data.hydra; 1651 1652 card_data->transid = KVASER_USB_HYDRA_MIN_TRANSID; 1653 spin_lock_init(&card_data->transid_lock); 1654 1655 memset(card_data->usb_rx_leftover, 0, KVASER_USB_HYDRA_MAX_CMD_LEN); 1656 card_data->usb_rx_leftover_len = 0; 1657 spin_lock_init(&card_data->usb_rx_leftover_lock); 1658 1659 memset(card_data->channel_to_he, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL, 1660 sizeof(card_data->channel_to_he)); 1661 card_data->sysdbg_he = 0; 1662 1663 for (i = 0; i < KVASER_USB_MAX_NET_DEVICES; i++) { 1664 err = kvaser_usb_hydra_map_channel 1665 (dev, 1666 (KVASER_USB_HYDRA_TRANSID_CANHE | i), 1667 i, "CAN"); 1668 if (err) { 1669 dev_err(&dev->intf->dev, 1670 "CMD_MAP_CHANNEL_REQ failed for CAN%u\n", i); 1671 return err; 1672 } 1673 } 1674 1675 err = kvaser_usb_hydra_map_channel(dev, KVASER_USB_HYDRA_TRANSID_SYSDBG, 1676 0, "SYSDBG"); 1677 if (err) { 1678 dev_err(&dev->intf->dev, 1679 "CMD_MAP_CHANNEL_REQ failed for SYSDBG\n"); 1680 return err; 1681 } 1682 1683 return 0; 1684 } 1685 1686 static int kvaser_usb_hydra_get_software_info(struct kvaser_usb *dev) 1687 { 1688 struct kvaser_cmd cmd; 1689 int err; 1690 1691 err = kvaser_usb_hydra_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO_REQ, 1692 -1); 1693 if (err) 1694 return err; 1695 1696 memset(&cmd, 0, sizeof(struct kvaser_cmd)); 1697 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_RESP, &cmd); 1698 if (err) 1699 return err; 1700 1701 dev->max_tx_urbs = min_t(unsigned int, KVASER_USB_MAX_TX_URBS, 1702 le16_to_cpu(cmd.sw_info.max_outstanding_tx)); 1703 1704 return 0; 1705 } 1706 1707 static int kvaser_usb_hydra_get_software_details(struct kvaser_usb *dev) 1708 { 1709 struct kvaser_cmd *cmd; 1710 int err; 1711 u32 flags; 1712 struct kvaser_usb_dev_card_data *card_data = &dev->card_data; 1713 1714 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 1715 if (!cmd) 1716 return -ENOMEM; 1717 1718 cmd->header.cmd_no = CMD_GET_SOFTWARE_DETAILS_REQ; 1719 cmd->sw_detail_req.use_ext_cmd = 1; 1720 kvaser_usb_hydra_set_cmd_dest_he 1721 (cmd, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL); 1722 1723 kvaser_usb_hydra_set_cmd_transid 1724 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1725 1726 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1727 if (err) 1728 goto end; 1729 1730 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_SOFTWARE_DETAILS_RESP, 1731 cmd); 1732 if (err) 1733 goto end; 1734 1735 dev->fw_version = le32_to_cpu(cmd->sw_detail_res.sw_version); 1736 flags = le32_to_cpu(cmd->sw_detail_res.sw_flags); 1737 1738 if (flags & KVASER_USB_HYDRA_SW_FLAG_FW_BAD) { 1739 dev_err(&dev->intf->dev, 1740 "Bad firmware, device refuse to run!\n"); 1741 err = -EINVAL; 1742 goto end; 1743 } 1744 1745 if (flags & KVASER_USB_HYDRA_SW_FLAG_FW_BETA) 1746 dev_info(&dev->intf->dev, "Beta firmware in use\n"); 1747 1748 if (flags & KVASER_USB_HYDRA_SW_FLAG_EXT_CAP) 1749 card_data->capabilities |= KVASER_USB_CAP_EXT_CAP; 1750 1751 if (flags & KVASER_USB_HYDRA_SW_FLAG_EXT_CMD) 1752 card_data->capabilities |= KVASER_USB_HYDRA_CAP_EXT_CMD; 1753 1754 if (flags & KVASER_USB_HYDRA_SW_FLAG_CANFD) 1755 card_data->ctrlmode_supported |= CAN_CTRLMODE_FD; 1756 1757 if (flags & KVASER_USB_HYDRA_SW_FLAG_NONISO) 1758 card_data->ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO; 1759 1760 if (flags & KVASER_USB_HYDRA_SW_FLAG_FREQ_80M) 1761 dev->cfg = &kvaser_usb_hydra_dev_cfg_kcan; 1762 else if (flags & KVASER_USB_HYDRA_SW_FLAG_CAN_FREQ_80M) 1763 dev->cfg = &kvaser_usb_hydra_dev_cfg_rt; 1764 else 1765 dev->cfg = &kvaser_usb_hydra_dev_cfg_flexc; 1766 1767 end: 1768 kfree(cmd); 1769 1770 return err; 1771 } 1772 1773 static int kvaser_usb_hydra_get_card_info(struct kvaser_usb *dev) 1774 { 1775 struct kvaser_cmd cmd; 1776 int err; 1777 1778 err = kvaser_usb_hydra_send_simple_cmd(dev, CMD_GET_CARD_INFO_REQ, -1); 1779 if (err) 1780 return err; 1781 1782 memset(&cmd, 0, sizeof(struct kvaser_cmd)); 1783 err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_CARD_INFO_RESP, &cmd); 1784 if (err) 1785 return err; 1786 1787 dev->nchannels = cmd.card_info.nchannels; 1788 if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES) 1789 return -EINVAL; 1790 1791 return 0; 1792 } 1793 1794 static int kvaser_usb_hydra_get_capabilities(struct kvaser_usb *dev) 1795 { 1796 int err; 1797 u16 status; 1798 1799 if (!(dev->card_data.capabilities & KVASER_USB_CAP_EXT_CAP)) { 1800 dev_info(&dev->intf->dev, 1801 "No extended capability support. Upgrade your device.\n"); 1802 return 0; 1803 } 1804 1805 err = kvaser_usb_hydra_get_single_capability 1806 (dev, 1807 KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE, 1808 &status); 1809 if (err) 1810 return err; 1811 if (status) 1812 dev_info(&dev->intf->dev, 1813 "KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE failed %u\n", 1814 status); 1815 1816 err = kvaser_usb_hydra_get_single_capability 1817 (dev, 1818 KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT, 1819 &status); 1820 if (err) 1821 return err; 1822 if (status) 1823 dev_info(&dev->intf->dev, 1824 "KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT failed %u\n", 1825 status); 1826 1827 err = kvaser_usb_hydra_get_single_capability 1828 (dev, KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT, 1829 &status); 1830 if (err) 1831 return err; 1832 if (status) 1833 dev_info(&dev->intf->dev, 1834 "KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT failed %u\n", 1835 status); 1836 1837 return 0; 1838 } 1839 1840 static int kvaser_usb_hydra_set_opt_mode(const struct kvaser_usb_net_priv *priv) 1841 { 1842 struct kvaser_usb *dev = priv->dev; 1843 struct kvaser_cmd *cmd; 1844 int err; 1845 1846 if ((priv->can.ctrlmode & 1847 (CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO)) == 1848 CAN_CTRLMODE_FD_NON_ISO) { 1849 netdev_warn(priv->netdev, 1850 "CTRLMODE_FD shall be on if CTRLMODE_FD_NON_ISO is on\n"); 1851 return -EINVAL; 1852 } 1853 1854 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 1855 if (!cmd) 1856 return -ENOMEM; 1857 1858 cmd->header.cmd_no = CMD_SET_DRIVERMODE_REQ; 1859 kvaser_usb_hydra_set_cmd_dest_he 1860 (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); 1861 kvaser_usb_hydra_set_cmd_transid 1862 (cmd, kvaser_usb_hydra_get_next_transid(dev)); 1863 if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) 1864 cmd->set_ctrlmode.mode = KVASER_USB_HYDRA_CTRLMODE_LISTEN; 1865 else 1866 cmd->set_ctrlmode.mode = KVASER_USB_HYDRA_CTRLMODE_NORMAL; 1867 1868 err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); 1869 kfree(cmd); 1870 1871 return err; 1872 } 1873 1874 static int kvaser_usb_hydra_start_chip(struct kvaser_usb_net_priv *priv) 1875 { 1876 int err; 1877 1878 reinit_completion(&priv->start_comp); 1879 1880 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_START_CHIP_REQ, 1881 priv->channel); 1882 if (err) 1883 return err; 1884 1885 if (!wait_for_completion_timeout(&priv->start_comp, 1886 msecs_to_jiffies(KVASER_USB_TIMEOUT))) 1887 return -ETIMEDOUT; 1888 1889 return 0; 1890 } 1891 1892 static int kvaser_usb_hydra_stop_chip(struct kvaser_usb_net_priv *priv) 1893 { 1894 int err; 1895 1896 reinit_completion(&priv->stop_comp); 1897 1898 /* Make sure we do not report invalid BUS_OFF from CMD_CHIP_STATE_EVENT 1899 * see comment in kvaser_usb_hydra_update_state() 1900 */ 1901 priv->can.state = CAN_STATE_STOPPED; 1902 1903 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_STOP_CHIP_REQ, 1904 priv->channel); 1905 if (err) 1906 return err; 1907 1908 if (!wait_for_completion_timeout(&priv->stop_comp, 1909 msecs_to_jiffies(KVASER_USB_TIMEOUT))) 1910 return -ETIMEDOUT; 1911 1912 return 0; 1913 } 1914 1915 static int kvaser_usb_hydra_flush_queue(struct kvaser_usb_net_priv *priv) 1916 { 1917 int err; 1918 1919 reinit_completion(&priv->flush_comp); 1920 1921 err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_FLUSH_QUEUE, 1922 priv->channel); 1923 if (err) 1924 return err; 1925 1926 if (!wait_for_completion_timeout(&priv->flush_comp, 1927 msecs_to_jiffies(KVASER_USB_TIMEOUT))) 1928 return -ETIMEDOUT; 1929 1930 return 0; 1931 } 1932 1933 /* A single extended hydra command can be transmitted in multiple transfers 1934 * We have to buffer partial hydra commands, and handle them on next callback. 1935 */ 1936 static void kvaser_usb_hydra_read_bulk_callback(struct kvaser_usb *dev, 1937 void *buf, int len) 1938 { 1939 unsigned long irq_flags; 1940 struct kvaser_cmd *cmd; 1941 int pos = 0; 1942 size_t cmd_len; 1943 struct kvaser_usb_dev_card_data_hydra *card_data = 1944 &dev->card_data.hydra; 1945 int usb_rx_leftover_len; 1946 spinlock_t *usb_rx_leftover_lock = &card_data->usb_rx_leftover_lock; 1947 1948 spin_lock_irqsave(usb_rx_leftover_lock, irq_flags); 1949 usb_rx_leftover_len = card_data->usb_rx_leftover_len; 1950 if (usb_rx_leftover_len) { 1951 int remaining_bytes; 1952 1953 cmd = (struct kvaser_cmd *)card_data->usb_rx_leftover; 1954 1955 cmd_len = kvaser_usb_hydra_cmd_size(cmd); 1956 1957 remaining_bytes = min_t(unsigned int, len, 1958 cmd_len - usb_rx_leftover_len); 1959 /* Make sure we do not overflow usb_rx_leftover */ 1960 if (remaining_bytes + usb_rx_leftover_len > 1961 KVASER_USB_HYDRA_MAX_CMD_LEN) { 1962 dev_err(&dev->intf->dev, "Format error\n"); 1963 spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); 1964 return; 1965 } 1966 1967 memcpy(card_data->usb_rx_leftover + usb_rx_leftover_len, buf, 1968 remaining_bytes); 1969 pos += remaining_bytes; 1970 1971 if (remaining_bytes + usb_rx_leftover_len == cmd_len) { 1972 kvaser_usb_hydra_handle_cmd(dev, cmd); 1973 usb_rx_leftover_len = 0; 1974 } else { 1975 /* Command still not complete */ 1976 usb_rx_leftover_len += remaining_bytes; 1977 } 1978 card_data->usb_rx_leftover_len = usb_rx_leftover_len; 1979 } 1980 spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); 1981 1982 while (pos < len) { 1983 cmd = buf + pos; 1984 1985 cmd_len = kvaser_usb_hydra_cmd_size(cmd); 1986 1987 if (pos + cmd_len > len) { 1988 /* We got first part of a command */ 1989 int leftover_bytes; 1990 1991 leftover_bytes = len - pos; 1992 /* Make sure we do not overflow usb_rx_leftover */ 1993 if (leftover_bytes > KVASER_USB_HYDRA_MAX_CMD_LEN) { 1994 dev_err(&dev->intf->dev, "Format error\n"); 1995 return; 1996 } 1997 spin_lock_irqsave(usb_rx_leftover_lock, irq_flags); 1998 memcpy(card_data->usb_rx_leftover, buf + pos, 1999 leftover_bytes); 2000 card_data->usb_rx_leftover_len = leftover_bytes; 2001 spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); 2002 break; 2003 } 2004 2005 kvaser_usb_hydra_handle_cmd(dev, cmd); 2006 pos += cmd_len; 2007 } 2008 } 2009 2010 static void * 2011 kvaser_usb_hydra_frame_to_cmd(const struct kvaser_usb_net_priv *priv, 2012 const struct sk_buff *skb, int *cmd_len, 2013 u16 transid) 2014 { 2015 void *buf; 2016 2017 if (priv->dev->card_data.capabilities & KVASER_USB_HYDRA_CAP_EXT_CMD) 2018 buf = kvaser_usb_hydra_frame_to_cmd_ext(priv, skb, cmd_len, 2019 transid); 2020 else 2021 buf = kvaser_usb_hydra_frame_to_cmd_std(priv, skb, cmd_len, 2022 transid); 2023 2024 return buf; 2025 } 2026 2027 const struct kvaser_usb_dev_ops kvaser_usb_hydra_dev_ops = { 2028 .dev_set_mode = kvaser_usb_hydra_set_mode, 2029 .dev_set_bittiming = kvaser_usb_hydra_set_bittiming, 2030 .dev_set_data_bittiming = kvaser_usb_hydra_set_data_bittiming, 2031 .dev_get_berr_counter = kvaser_usb_hydra_get_berr_counter, 2032 .dev_setup_endpoints = kvaser_usb_hydra_setup_endpoints, 2033 .dev_init_card = kvaser_usb_hydra_init_card, 2034 .dev_get_software_info = kvaser_usb_hydra_get_software_info, 2035 .dev_get_software_details = kvaser_usb_hydra_get_software_details, 2036 .dev_get_card_info = kvaser_usb_hydra_get_card_info, 2037 .dev_get_capabilities = kvaser_usb_hydra_get_capabilities, 2038 .dev_set_opt_mode = kvaser_usb_hydra_set_opt_mode, 2039 .dev_start_chip = kvaser_usb_hydra_start_chip, 2040 .dev_stop_chip = kvaser_usb_hydra_stop_chip, 2041 .dev_reset_chip = NULL, 2042 .dev_flush_queue = kvaser_usb_hydra_flush_queue, 2043 .dev_read_bulk_callback = kvaser_usb_hydra_read_bulk_callback, 2044 .dev_frame_to_cmd = kvaser_usb_hydra_frame_to_cmd, 2045 }; 2046 2047 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_kcan = { 2048 .clock = { 2049 .freq = 80 * MEGA /* Hz */, 2050 }, 2051 .timestamp_freq = 80, 2052 .bittiming_const = &kvaser_usb_hydra_kcan_bittiming_c, 2053 .data_bittiming_const = &kvaser_usb_hydra_kcan_bittiming_c, 2054 }; 2055 2056 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_flexc = { 2057 .clock = { 2058 .freq = 24 * MEGA /* Hz */, 2059 }, 2060 .timestamp_freq = 1, 2061 .bittiming_const = &kvaser_usb_flexc_bittiming_const, 2062 }; 2063 2064 static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_rt = { 2065 .clock = { 2066 .freq = 80 * MEGA /* Hz */, 2067 }, 2068 .timestamp_freq = 24, 2069 .bittiming_const = &kvaser_usb_hydra_rt_bittiming_c, 2070 .data_bittiming_const = &kvaser_usb_hydra_rtd_bittiming_c, 2071 }; 2072