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1// SPDX-License-Identifier: GPL-2.02/* Parts of this driver are based on the following:3 * - Kvaser linux leaf driver (version 4.78)4 * - CAN driver for esd CAN-USB/25 * - Kvaser linux usbcanII driver (version 5.3)6 *7 * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved.8 * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh9 * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be>10 * Copyright (C) 2015 Valeo S.A.11 */12 13#include <linux/completion.h>14#include <linux/device.h>15#include <linux/gfp.h>16#include <linux/jiffies.h>17#include <linux/kernel.h>18#include <linux/netdevice.h>19#include <linux/spinlock.h>20#include <linux/string.h>21#include <linux/types.h>22#include <linux/units.h>23#include <linux/usb.h>24#include <linux/workqueue.h>25 26#include <linux/can.h>27#include <linux/can/dev.h>28#include <linux/can/error.h>29#include <linux/can/netlink.h>30 31#include "kvaser_usb.h"32 33#define MAX_USBCAN_NET_DEVICES 234 35/* Command header size */36#define CMD_HEADER_LEN 237 38/* Kvaser CAN message flags */39#define MSG_FLAG_ERROR_FRAME BIT(0)40#define MSG_FLAG_OVERRUN BIT(1)41#define MSG_FLAG_NERR BIT(2)42#define MSG_FLAG_WAKEUP BIT(3)43#define MSG_FLAG_REMOTE_FRAME BIT(4)44#define MSG_FLAG_RESERVED BIT(5)45#define MSG_FLAG_TX_ACK BIT(6)46#define MSG_FLAG_TX_REQUEST BIT(7)47 48/* CAN states (M16C CxSTRH register) */49#define M16C_STATE_BUS_RESET BIT(0)50#define M16C_STATE_BUS_ERROR BIT(4)51#define M16C_STATE_BUS_PASSIVE BIT(5)52#define M16C_STATE_BUS_OFF BIT(6)53 54/* Leaf/usbcan command ids */55#define CMD_RX_STD_MESSAGE 1256#define CMD_TX_STD_MESSAGE 1357#define CMD_RX_EXT_MESSAGE 1458#define CMD_TX_EXT_MESSAGE 1559#define CMD_SET_BUS_PARAMS 1660#define CMD_GET_BUS_PARAMS 1761#define CMD_GET_BUS_PARAMS_REPLY 1862#define CMD_GET_CHIP_STATE 1963#define CMD_CHIP_STATE_EVENT 2064#define CMD_SET_CTRL_MODE 2165#define CMD_RESET_CHIP 2466#define CMD_START_CHIP 2667#define CMD_START_CHIP_REPLY 2768#define CMD_STOP_CHIP 2869#define CMD_STOP_CHIP_REPLY 2970 71#define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 3372 73#define CMD_GET_CARD_INFO 3474#define CMD_GET_CARD_INFO_REPLY 3575#define CMD_GET_SOFTWARE_INFO 3876#define CMD_GET_SOFTWARE_INFO_REPLY 3977#define CMD_ERROR_EVENT 4578#define CMD_FLUSH_QUEUE 4879#define CMD_TX_ACKNOWLEDGE 5080#define CMD_CAN_ERROR_EVENT 5181#define CMD_FLUSH_QUEUE_REPLY 6882#define CMD_GET_CAPABILITIES_REQ 9583#define CMD_GET_CAPABILITIES_RESP 9684 85#define CMD_LEAF_LOG_MESSAGE 10686 87/* Leaf frequency options */88#define KVASER_USB_LEAF_SWOPTION_FREQ_MASK 0x6089#define KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK 090#define KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK BIT(5)91#define KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK BIT(6)92 93#define KVASER_USB_LEAF_SWOPTION_EXT_CAP BIT(12)94 95/* error factors */96#define M16C_EF_ACKE BIT(0)97#define M16C_EF_CRCE BIT(1)98#define M16C_EF_FORME BIT(2)99#define M16C_EF_STFE BIT(3)100#define M16C_EF_BITE0 BIT(4)101#define M16C_EF_BITE1 BIT(5)102#define M16C_EF_RCVE BIT(6)103#define M16C_EF_TRE BIT(7)104 105/* Only Leaf-based devices can report M16C error factors,106 * thus define our own error status flags for USBCANII107 */108#define USBCAN_ERROR_STATE_NONE 0109#define USBCAN_ERROR_STATE_TX_ERROR BIT(0)110#define USBCAN_ERROR_STATE_RX_ERROR BIT(1)111#define USBCAN_ERROR_STATE_BUSERROR BIT(2)112 113/* ctrl modes */114#define KVASER_CTRL_MODE_NORMAL 1115#define KVASER_CTRL_MODE_SILENT 2116#define KVASER_CTRL_MODE_SELFRECEPTION 3117#define KVASER_CTRL_MODE_OFF 4118 119/* Extended CAN identifier flag */120#define KVASER_EXTENDED_FRAME BIT(31)121 122/* USBCanII timestamp */123#define KVASER_USB_USBCAN_CLK_OVERFLOW_MASK GENMASK(31, 16)124#define KVASER_USB_USBCAN_TIMESTAMP_FACTOR 10125 126struct kvaser_cmd_simple {127 u8 tid;128 u8 channel;129} __packed;130 131struct kvaser_cmd_cardinfo {132 u8 tid;133 u8 nchannels;134 __le32 serial_number;135 __le32 padding0;136 __le32 clock_resolution;137 __le32 mfgdate;138 u8 ean[8];139 u8 hw_revision;140 union {141 struct {142 u8 usb_hs_mode;143 } __packed leaf1;144 struct {145 u8 padding;146 } __packed usbcan1;147 } __packed;148 __le16 padding1;149} __packed;150 151struct leaf_cmd_softinfo {152 u8 tid;153 u8 padding0;154 __le32 sw_options;155 __le32 fw_version;156 __le16 max_outstanding_tx;157 __le16 padding1[9];158} __packed;159 160struct usbcan_cmd_softinfo {161 u8 tid;162 u8 fw_name[5];163 __le16 max_outstanding_tx;164 u8 padding[6];165 __le32 fw_version;166 __le16 checksum;167 __le16 sw_options;168} __packed;169 170struct kvaser_cmd_busparams {171 u8 tid;172 u8 channel;173 struct kvaser_usb_busparams busparams;174} __packed;175 176struct kvaser_cmd_tx_can {177 u8 channel;178 u8 tid;179 u8 data[14];180 union {181 struct {182 u8 padding;183 u8 flags;184 } __packed leaf;185 struct {186 u8 flags;187 u8 padding;188 } __packed usbcan;189 } __packed;190} __packed;191 192struct kvaser_cmd_rx_can_header {193 u8 channel;194 u8 flag;195} __packed;196 197struct leaf_cmd_rx_can {198 u8 channel;199 u8 flag;200 201 __le16 time[3];202 u8 data[14];203} __packed;204 205struct usbcan_cmd_rx_can {206 u8 channel;207 u8 flag;208 209 u8 data[14];210 __le16 time;211} __packed;212 213struct leaf_cmd_chip_state_event {214 u8 tid;215 u8 channel;216 217 __le16 time[3];218 u8 tx_errors_count;219 u8 rx_errors_count;220 221 u8 status;222 u8 padding[3];223} __packed;224 225struct usbcan_cmd_chip_state_event {226 u8 tid;227 u8 channel;228 229 u8 tx_errors_count;230 u8 rx_errors_count;231 __le16 time;232 233 u8 status;234 u8 padding[3];235} __packed;236 237struct kvaser_cmd_tx_acknowledge_header {238 u8 channel;239 u8 tid;240} __packed;241 242struct leaf_cmd_tx_acknowledge {243 u8 channel;244 u8 tid;245 __le16 time[3];246 u8 padding[2];247} __packed;248 249struct usbcan_cmd_tx_acknowledge {250 u8 channel;251 u8 tid;252 __le16 time;253 u8 padding[2];254} __packed;255 256struct leaf_cmd_can_error_event {257 u8 tid;258 u8 flags;259 __le16 time[3];260 u8 channel;261 u8 padding;262 u8 tx_errors_count;263 u8 rx_errors_count;264 u8 status;265 u8 error_factor;266} __packed;267 268struct usbcan_cmd_can_error_event {269 u8 tid;270 u8 padding;271 u8 tx_errors_count_ch0;272 u8 rx_errors_count_ch0;273 u8 tx_errors_count_ch1;274 u8 rx_errors_count_ch1;275 u8 status_ch0;276 u8 status_ch1;277 __le16 time;278} __packed;279 280/* CMD_ERROR_EVENT error codes */281#define KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL 0x8282#define KVASER_USB_LEAF_ERROR_EVENT_PARAM 0x9283 284struct leaf_cmd_error_event {285 u8 tid;286 u8 error_code;287 __le16 timestamp[3];288 __le16 padding;289 __le16 info1;290 __le16 info2;291} __packed;292 293struct usbcan_cmd_error_event {294 u8 tid;295 u8 error_code;296 __le16 info1;297 __le16 info2;298 __le16 timestamp;299 __le16 padding;300} __packed;301 302struct usbcan_cmd_clk_overflow_event {303 u8 tid;304 u8 padding;305 __le32 time;306} __packed;307 308struct kvaser_cmd_ctrl_mode {309 u8 tid;310 u8 channel;311 u8 ctrl_mode;312 u8 padding[3];313} __packed;314 315struct kvaser_cmd_flush_queue {316 u8 tid;317 u8 channel;318 u8 flags;319 u8 padding[3];320} __packed;321 322struct leaf_cmd_log_message {323 u8 channel;324 u8 flags;325 __le16 time[3];326 u8 dlc;327 u8 time_offset;328 __le32 id;329 u8 data[8];330} __packed;331 332/* Sub commands for cap_req and cap_res */333#define KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE 0x02334#define KVASER_USB_LEAF_CAP_CMD_ERR_REPORT 0x05335struct kvaser_cmd_cap_req {336 __le16 padding0;337 __le16 cap_cmd;338 __le16 padding1;339 __le16 channel;340} __packed;341 342/* Status codes for cap_res */343#define KVASER_USB_LEAF_CAP_STAT_OK 0x00344#define KVASER_USB_LEAF_CAP_STAT_NOT_IMPL 0x01345#define KVASER_USB_LEAF_CAP_STAT_UNAVAIL 0x02346struct kvaser_cmd_cap_res {347 __le16 padding;348 __le16 cap_cmd;349 __le16 status;350 __le32 mask;351 __le32 value;352} __packed;353 354struct kvaser_cmd {355 u8 len;356 u8 id;357 union {358 struct kvaser_cmd_simple simple;359 struct kvaser_cmd_cardinfo cardinfo;360 struct kvaser_cmd_busparams busparams;361 362 struct kvaser_cmd_rx_can_header rx_can_header;363 struct kvaser_cmd_tx_acknowledge_header tx_acknowledge_header;364 365 union {366 struct leaf_cmd_softinfo softinfo;367 struct leaf_cmd_rx_can rx_can;368 struct leaf_cmd_chip_state_event chip_state_event;369 struct leaf_cmd_can_error_event can_error_event;370 struct leaf_cmd_log_message log_message;371 struct leaf_cmd_error_event error_event;372 struct kvaser_cmd_cap_req cap_req;373 struct kvaser_cmd_cap_res cap_res;374 struct leaf_cmd_tx_acknowledge tx_ack;375 } __packed leaf;376 377 union {378 struct usbcan_cmd_softinfo softinfo;379 struct usbcan_cmd_rx_can rx_can;380 struct usbcan_cmd_chip_state_event chip_state_event;381 struct usbcan_cmd_can_error_event can_error_event;382 struct usbcan_cmd_error_event error_event;383 struct usbcan_cmd_tx_acknowledge tx_ack;384 struct usbcan_cmd_clk_overflow_event clk_overflow_event;385 } __packed usbcan;386 387 struct kvaser_cmd_tx_can tx_can;388 struct kvaser_cmd_ctrl_mode ctrl_mode;389 struct kvaser_cmd_flush_queue flush_queue;390 } u;391} __packed;392 393#define CMD_SIZE_ANY 0xff394#define kvaser_fsize(field) sizeof_field(struct kvaser_cmd, field)395 396static const u8 kvaser_usb_leaf_cmd_sizes_leaf[] = {397 [CMD_START_CHIP_REPLY] = kvaser_fsize(u.simple),398 [CMD_STOP_CHIP_REPLY] = kvaser_fsize(u.simple),399 [CMD_GET_CARD_INFO_REPLY] = kvaser_fsize(u.cardinfo),400 [CMD_TX_ACKNOWLEDGE] = kvaser_fsize(u.leaf.tx_ack),401 [CMD_GET_SOFTWARE_INFO_REPLY] = kvaser_fsize(u.leaf.softinfo),402 [CMD_RX_STD_MESSAGE] = kvaser_fsize(u.leaf.rx_can),403 [CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.leaf.rx_can),404 [CMD_LEAF_LOG_MESSAGE] = kvaser_fsize(u.leaf.log_message),405 [CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.leaf.chip_state_event),406 [CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.leaf.can_error_event),407 [CMD_GET_CAPABILITIES_RESP] = kvaser_fsize(u.leaf.cap_res),408 [CMD_GET_BUS_PARAMS_REPLY] = kvaser_fsize(u.busparams),409 [CMD_ERROR_EVENT] = kvaser_fsize(u.leaf.error_event),410 /* ignored events: */411 [CMD_FLUSH_QUEUE_REPLY] = CMD_SIZE_ANY,412};413 414static const u8 kvaser_usb_leaf_cmd_sizes_usbcan[] = {415 [CMD_START_CHIP_REPLY] = kvaser_fsize(u.simple),416 [CMD_STOP_CHIP_REPLY] = kvaser_fsize(u.simple),417 [CMD_GET_CARD_INFO_REPLY] = kvaser_fsize(u.cardinfo),418 [CMD_TX_ACKNOWLEDGE] = kvaser_fsize(u.usbcan.tx_ack),419 [CMD_GET_SOFTWARE_INFO_REPLY] = kvaser_fsize(u.usbcan.softinfo),420 [CMD_RX_STD_MESSAGE] = kvaser_fsize(u.usbcan.rx_can),421 [CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.usbcan.rx_can),422 [CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.usbcan.chip_state_event),423 [CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.usbcan.can_error_event),424 [CMD_ERROR_EVENT] = kvaser_fsize(u.usbcan.error_event),425 [CMD_USBCAN_CLOCK_OVERFLOW_EVENT] = kvaser_fsize(u.usbcan.clk_overflow_event),426};427 428/* Summary of a kvaser error event, for a unified Leaf/Usbcan error429 * handling. Some discrepancies between the two families exist:430 *431 * - USBCAN firmware does not report M16C "error factors"432 * - USBCAN controllers has difficulties reporting if the raised error433 * event is for ch0 or ch1. They leave such arbitration to the OS434 * driver by letting it compare error counters with previous values435 * and decide the error event's channel. Thus for USBCAN, the channel436 * field is only advisory.437 */438struct kvaser_usb_err_summary {439 u8 channel, status, txerr, rxerr;440 union {441 struct {442 u8 error_factor;443 } leaf;444 struct {445 u8 other_ch_status;446 u8 error_state;447 } usbcan;448 };449};450 451struct kvaser_usb_net_leaf_priv {452 struct kvaser_usb_net_priv *net;453 454 struct delayed_work chip_state_req_work;455 456 /* started but not reported as bus-on yet */457 bool joining_bus;458};459 460static const struct can_bittiming_const kvaser_usb_leaf_m16c_bittiming_const = {461 .name = "kvaser_usb_ucii",462 .tseg1_min = 4,463 .tseg1_max = 16,464 .tseg2_min = 2,465 .tseg2_max = 8,466 .sjw_max = 4,467 .brp_min = 1,468 .brp_max = 16,469 .brp_inc = 1,470};471 472static const struct can_bittiming_const kvaser_usb_leaf_m32c_bittiming_const = {473 .name = "kvaser_usb_leaf",474 .tseg1_min = 3,475 .tseg1_max = 16,476 .tseg2_min = 2,477 .tseg2_max = 8,478 .sjw_max = 4,479 .brp_min = 2,480 .brp_max = 128,481 .brp_inc = 2,482};483 484static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_usbcan_dev_cfg = {485 .clock = {486 .freq = 8 * MEGA /* Hz */,487 },488 .timestamp_freq = 1,489 .bittiming_const = &kvaser_usb_leaf_m16c_bittiming_const,490};491 492static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg_16mhz = {493 .clock = {494 .freq = 16 * MEGA /* Hz */,495 },496 .timestamp_freq = 16,497 .bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,498};499 500static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg_24mhz = {501 .clock = {502 .freq = 16 * MEGA /* Hz */,503 },504 .timestamp_freq = 24,505 .bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,506};507 508static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg_32mhz = {509 .clock = {510 .freq = 16 * MEGA /* Hz */,511 },512 .timestamp_freq = 32,513 .bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,514};515 516static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_16mhz = {517 .clock = {518 .freq = 16 * MEGA /* Hz */,519 },520 .timestamp_freq = 16,521 .bittiming_const = &kvaser_usb_flexc_bittiming_const,522};523 524static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_24mhz = {525 .clock = {526 .freq = 24 * MEGA /* Hz */,527 },528 .timestamp_freq = 24,529 .bittiming_const = &kvaser_usb_flexc_bittiming_const,530};531 532static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_32mhz = {533 .clock = {534 .freq = 32 * MEGA /* Hz */,535 },536 .timestamp_freq = 32,537 .bittiming_const = &kvaser_usb_flexc_bittiming_const,538};539 540static inline ktime_t kvaser_usb_usbcan_timestamp_to_ktime(const struct kvaser_usb *dev,541 __le16 timestamp)542{543 u64 ticks = le16_to_cpu(timestamp) |544 dev->card_data.usbcan_timestamp_msb;545 546 return kvaser_usb_ticks_to_ktime(dev->cfg, ticks * KVASER_USB_USBCAN_TIMESTAMP_FACTOR);547}548 549static int kvaser_usb_leaf_verify_size(const struct kvaser_usb *dev,550 const struct kvaser_cmd *cmd)551{552 /* buffer size >= cmd->len ensured by caller */553 u8 min_size = 0;554 555 switch (dev->driver_info->family) {556 case KVASER_LEAF:557 if (cmd->id < ARRAY_SIZE(kvaser_usb_leaf_cmd_sizes_leaf))558 min_size = kvaser_usb_leaf_cmd_sizes_leaf[cmd->id];559 break;560 case KVASER_USBCAN:561 if (cmd->id < ARRAY_SIZE(kvaser_usb_leaf_cmd_sizes_usbcan))562 min_size = kvaser_usb_leaf_cmd_sizes_usbcan[cmd->id];563 break;564 }565 566 if (min_size == CMD_SIZE_ANY)567 return 0;568 569 if (min_size) {570 min_size += CMD_HEADER_LEN;571 if (cmd->len >= min_size)572 return 0;573 574 dev_err_ratelimited(&dev->intf->dev,575 "Received command %u too short (size %u, needed %u)",576 cmd->id, cmd->len, min_size);577 return -EIO;578 }579 580 dev_warn_ratelimited(&dev->intf->dev,581 "Unhandled command (%d, size %d)\n",582 cmd->id, cmd->len);583 return -EINVAL;584}585 586static void *587kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv,588 const struct sk_buff *skb, int *cmd_len,589 u16 transid)590{591 struct kvaser_usb *dev = priv->dev;592 struct kvaser_cmd *cmd;593 u8 *cmd_tx_can_flags = NULL; /* GCC */594 struct can_frame *cf = (struct can_frame *)skb->data;595 596 cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);597 if (cmd) {598 cmd->u.tx_can.tid = transid & 0xff;599 cmd->len = *cmd_len = CMD_HEADER_LEN +600 sizeof(struct kvaser_cmd_tx_can);601 cmd->u.tx_can.channel = priv->channel;602 603 switch (dev->driver_info->family) {604 case KVASER_LEAF:605 cmd_tx_can_flags = &cmd->u.tx_can.leaf.flags;606 break;607 case KVASER_USBCAN:608 cmd_tx_can_flags = &cmd->u.tx_can.usbcan.flags;609 break;610 }611 612 *cmd_tx_can_flags = 0;613 614 if (cf->can_id & CAN_EFF_FLAG) {615 cmd->id = CMD_TX_EXT_MESSAGE;616 cmd->u.tx_can.data[0] = (cf->can_id >> 24) & 0x1f;617 cmd->u.tx_can.data[1] = (cf->can_id >> 18) & 0x3f;618 cmd->u.tx_can.data[2] = (cf->can_id >> 14) & 0x0f;619 cmd->u.tx_can.data[3] = (cf->can_id >> 6) & 0xff;620 cmd->u.tx_can.data[4] = cf->can_id & 0x3f;621 } else {622 cmd->id = CMD_TX_STD_MESSAGE;623 cmd->u.tx_can.data[0] = (cf->can_id >> 6) & 0x1f;624 cmd->u.tx_can.data[1] = cf->can_id & 0x3f;625 }626 627 cmd->u.tx_can.data[5] = can_get_cc_dlc(cf, priv->can.ctrlmode);628 memcpy(&cmd->u.tx_can.data[6], cf->data, cf->len);629 630 if (cf->can_id & CAN_RTR_FLAG)631 *cmd_tx_can_flags |= MSG_FLAG_REMOTE_FRAME;632 }633 return cmd;634}635 636static int kvaser_usb_leaf_wait_cmd(const struct kvaser_usb *dev, u8 id,637 struct kvaser_cmd *cmd)638{639 struct kvaser_cmd *tmp;640 void *buf;641 int actual_len;642 int err;643 int pos;644 unsigned long to = jiffies + msecs_to_jiffies(KVASER_USB_TIMEOUT);645 646 buf = kzalloc(KVASER_USB_RX_BUFFER_SIZE, GFP_KERNEL);647 if (!buf)648 return -ENOMEM;649 650 do {651 err = kvaser_usb_recv_cmd(dev, buf, KVASER_USB_RX_BUFFER_SIZE,652 &actual_len);653 if (err < 0)654 goto end;655 656 pos = 0;657 while (pos <= actual_len - CMD_HEADER_LEN) {658 tmp = buf + pos;659 660 /* Handle commands crossing the USB endpoint max packet661 * size boundary. Check kvaser_usb_read_bulk_callback()662 * for further details.663 */664 if (tmp->len == 0) {665 pos = round_up(pos,666 le16_to_cpu667 (dev->bulk_in->wMaxPacketSize));668 continue;669 }670 671 if (pos + tmp->len > actual_len) {672 dev_err_ratelimited(&dev->intf->dev,673 "Format error\n");674 break;675 }676 677 if (tmp->id == id) {678 memcpy(cmd, tmp, tmp->len);679 goto end;680 }681 682 pos += tmp->len;683 }684 } while (time_before(jiffies, to));685 686 err = -EINVAL;687 688end:689 kfree(buf);690 691 if (err == 0)692 err = kvaser_usb_leaf_verify_size(dev, cmd);693 694 return err;695}696 697static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev,698 u8 cmd_id, int channel)699{700 struct kvaser_cmd *cmd;701 int rc;702 703 cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);704 if (!cmd)705 return -ENOMEM;706 707 cmd->id = cmd_id;708 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple);709 cmd->u.simple.channel = channel;710 cmd->u.simple.tid = 0xff;711 712 rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);713 714 kfree(cmd);715 return rc;716}717 718static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev,719 const struct leaf_cmd_softinfo *softinfo)720{721 u32 sw_options = le32_to_cpu(softinfo->sw_options);722 723 dev->fw_version = le32_to_cpu(softinfo->fw_version);724 dev->max_tx_urbs = le16_to_cpu(softinfo->max_outstanding_tx);725 726 if (sw_options & KVASER_USB_LEAF_SWOPTION_EXT_CAP)727 dev->card_data.capabilities |= KVASER_USB_CAP_EXT_CAP;728 729 if (dev->driver_info->quirks & KVASER_USB_QUIRK_IGNORE_CLK_FREQ) {730 /* Firmware expects bittiming parameters calculated for 16MHz731 * clock, regardless of the actual clock732 * Though, the reported freq is used for timestamps733 */734 switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {735 case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:736 dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_16mhz;737 break;738 case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:739 dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_24mhz;740 break;741 case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:742 dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_32mhz;743 break;744 }745 } else {746 switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {747 case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:748 dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_16mhz;749 break;750 case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:751 dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_24mhz;752 break;753 case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:754 dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_32mhz;755 break;756 }757 }758}759 760static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev)761{762 struct kvaser_cmd cmd;763 int err;764 765 err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO, 0);766 if (err)767 return err;768 769 err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_REPLY, &cmd);770 if (err)771 return err;772 773 switch (dev->driver_info->family) {774 case KVASER_LEAF:775 kvaser_usb_leaf_get_software_info_leaf(dev, &cmd.u.leaf.softinfo);776 break;777 case KVASER_USBCAN:778 dev->fw_version = le32_to_cpu(cmd.u.usbcan.softinfo.fw_version);779 dev->max_tx_urbs =780 le16_to_cpu(cmd.u.usbcan.softinfo.max_outstanding_tx);781 dev->cfg = &kvaser_usb_leaf_usbcan_dev_cfg;782 break;783 }784 785 return 0;786}787 788static int kvaser_usb_leaf_get_software_info(struct kvaser_usb *dev)789{790 int err;791 int retry = 3;792 793 /* On some x86 laptops, plugging a Kvaser device again after794 * an unplug makes the firmware always ignore the very first795 * command. For such a case, provide some room for retries796 * instead of completely exiting the driver.797 */798 do {799 err = kvaser_usb_leaf_get_software_info_inner(dev);800 } while (--retry && err == -ETIMEDOUT);801 802 return err;803}804 805static int kvaser_usb_leaf_get_card_info(struct kvaser_usb *dev)806{807 struct kvaser_cmd cmd;808 int err;809 810 err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_CARD_INFO, 0);811 if (err)812 return err;813 814 err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CARD_INFO_REPLY, &cmd);815 if (err)816 return err;817 818 dev->nchannels = cmd.u.cardinfo.nchannels;819 if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES ||820 (dev->driver_info->family == KVASER_USBCAN &&821 dev->nchannels > MAX_USBCAN_NET_DEVICES))822 return -EINVAL;823 824 return 0;825}826 827static int kvaser_usb_leaf_get_single_capability(struct kvaser_usb *dev,828 u16 cap_cmd_req, u16 *status)829{830 struct kvaser_usb_dev_card_data *card_data = &dev->card_data;831 struct kvaser_cmd *cmd;832 u32 value = 0;833 u32 mask = 0;834 u16 cap_cmd_res;835 int err;836 int i;837 838 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);839 if (!cmd)840 return -ENOMEM;841 842 cmd->id = CMD_GET_CAPABILITIES_REQ;843 cmd->u.leaf.cap_req.cap_cmd = cpu_to_le16(cap_cmd_req);844 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_cap_req);845 846 err = kvaser_usb_send_cmd(dev, cmd, cmd->len);847 if (err)848 goto end;849 850 err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CAPABILITIES_RESP, cmd);851 if (err)852 goto end;853 854 *status = le16_to_cpu(cmd->u.leaf.cap_res.status);855 856 if (*status != KVASER_USB_LEAF_CAP_STAT_OK)857 goto end;858 859 cap_cmd_res = le16_to_cpu(cmd->u.leaf.cap_res.cap_cmd);860 switch (cap_cmd_res) {861 case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE:862 case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT:863 value = le32_to_cpu(cmd->u.leaf.cap_res.value);864 mask = le32_to_cpu(cmd->u.leaf.cap_res.mask);865 break;866 default:867 dev_warn(&dev->intf->dev, "Unknown capability command %u\n",868 cap_cmd_res);869 break;870 }871 872 for (i = 0; i < dev->nchannels; i++) {873 if (BIT(i) & (value & mask)) {874 switch (cap_cmd_res) {875 case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE:876 card_data->ctrlmode_supported |=877 CAN_CTRLMODE_LISTENONLY;878 break;879 case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT:880 card_data->capabilities |=881 KVASER_USB_CAP_BERR_CAP;882 break;883 }884 }885 }886 887end:888 kfree(cmd);889 890 return err;891}892 893static int kvaser_usb_leaf_get_capabilities_leaf(struct kvaser_usb *dev)894{895 int err;896 u16 status;897 898 if (!(dev->card_data.capabilities & KVASER_USB_CAP_EXT_CAP)) {899 dev_info(&dev->intf->dev,900 "No extended capability support. Upgrade device firmware.\n");901 return 0;902 }903 904 err = kvaser_usb_leaf_get_single_capability(dev,905 KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE,906 &status);907 if (err)908 return err;909 if (status)910 dev_info(&dev->intf->dev,911 "KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE failed %u\n",912 status);913 914 err = kvaser_usb_leaf_get_single_capability(dev,915 KVASER_USB_LEAF_CAP_CMD_ERR_REPORT,916 &status);917 if (err)918 return err;919 if (status)920 dev_info(&dev->intf->dev,921 "KVASER_USB_LEAF_CAP_CMD_ERR_REPORT failed %u\n",922 status);923 924 return 0;925}926 927static int kvaser_usb_leaf_get_capabilities(struct kvaser_usb *dev)928{929 int err = 0;930 931 if (dev->driver_info->family == KVASER_LEAF)932 err = kvaser_usb_leaf_get_capabilities_leaf(dev);933 934 return err;935}936 937static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev,938 const struct kvaser_cmd *cmd)939{940 struct net_device_stats *stats;941 struct kvaser_usb_tx_urb_context *context;942 struct kvaser_usb_net_priv *priv;943 unsigned long flags;944 u8 channel, tid;945 struct sk_buff *skb;946 ktime_t hwtstamp = 0;947 948 channel = cmd->u.tx_acknowledge_header.channel;949 tid = cmd->u.tx_acknowledge_header.tid;950 951 if (channel >= dev->nchannels) {952 dev_err(&dev->intf->dev,953 "Invalid channel number (%d)\n", channel);954 return;955 }956 957 priv = dev->nets[channel];958 959 if (!netif_device_present(priv->netdev))960 return;961 962 stats = &priv->netdev->stats;963 964 context = &priv->tx_contexts[tid % dev->max_tx_urbs];965 966 /* Sometimes the state change doesn't come after a bus-off event */967 if (priv->can.restart_ms && priv->can.state == CAN_STATE_BUS_OFF) {968 struct sk_buff *err_skb;969 struct can_frame *cf;970 971 err_skb = alloc_can_err_skb(priv->netdev, &cf);972 if (err_skb) {973 cf->can_id |= CAN_ERR_RESTARTED;974 975 netif_rx(err_skb);976 } else {977 netdev_err(priv->netdev,978 "No memory left for err_skb\n");979 }980 981 priv->can.can_stats.restarts++;982 netif_carrier_on(priv->netdev);983 984 priv->can.state = CAN_STATE_ERROR_ACTIVE;985 }986 switch (dev->driver_info->family) {987 case KVASER_LEAF:988 hwtstamp = kvaser_usb_timestamp48_to_ktime(dev->cfg, cmd->u.leaf.tx_ack.time);989 break;990 case KVASER_USBCAN:991 hwtstamp = kvaser_usb_usbcan_timestamp_to_ktime(dev, cmd->u.usbcan.tx_ack.time);992 break;993 }994 995 spin_lock_irqsave(&priv->tx_contexts_lock, flags);996 997 skb = priv->can.echo_skb[context->echo_index];998 if (skb)999 skb_hwtstamps(skb)->hwtstamp = hwtstamp;1000 stats->tx_packets++;1001 stats->tx_bytes += can_get_echo_skb(priv->netdev,1002 context->echo_index, NULL);1003 context->echo_index = dev->max_tx_urbs;1004 --priv->active_tx_contexts;1005 netif_wake_queue(priv->netdev);1006 1007 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);1008}1009 1010static int kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv *priv,1011 u8 cmd_id)1012{1013 struct kvaser_cmd *cmd;1014 int err;1015 1016 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);1017 if (!cmd)1018 return -ENOMEM;1019 1020 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple);1021 cmd->id = cmd_id;1022 cmd->u.simple.channel = priv->channel;1023 1024 err = kvaser_usb_send_cmd_async(priv, cmd, cmd->len);1025 if (err)1026 kfree(cmd);1027 1028 return err;1029}1030 1031static void kvaser_usb_leaf_chip_state_req_work(struct work_struct *work)1032{1033 struct kvaser_usb_net_leaf_priv *leaf =1034 container_of(work, struct kvaser_usb_net_leaf_priv,1035 chip_state_req_work.work);1036 struct kvaser_usb_net_priv *priv = leaf->net;1037 1038 kvaser_usb_leaf_simple_cmd_async(priv, CMD_GET_CHIP_STATE);1039}1040 1041static void1042kvaser_usb_leaf_rx_error_update_can_state(struct kvaser_usb_net_priv *priv,1043 const struct kvaser_usb_err_summary *es,1044 struct can_frame *cf)1045{1046 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;1047 struct kvaser_usb *dev = priv->dev;1048 struct net_device_stats *stats = &priv->netdev->stats;1049 enum can_state cur_state, new_state, tx_state, rx_state;1050 1051 netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status);1052 1053 new_state = priv->can.state;1054 cur_state = priv->can.state;1055 1056 if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {1057 new_state = CAN_STATE_BUS_OFF;1058 } else if (es->status & M16C_STATE_BUS_PASSIVE) {1059 new_state = CAN_STATE_ERROR_PASSIVE;1060 } else if ((es->status & M16C_STATE_BUS_ERROR) &&1061 cur_state >= CAN_STATE_BUS_OFF) {1062 /* Guard against spurious error events after a busoff */1063 } else if (es->txerr >= 128 || es->rxerr >= 128) {1064 new_state = CAN_STATE_ERROR_PASSIVE;1065 } else if (es->txerr >= 96 || es->rxerr >= 96) {1066 new_state = CAN_STATE_ERROR_WARNING;1067 } else {1068 new_state = CAN_STATE_ERROR_ACTIVE;1069 }1070 1071 /* 0bfd:0124 FW 4.18.778 was observed to send the initial1072 * CMD_CHIP_STATE_EVENT after CMD_START_CHIP with M16C_STATE_BUS_OFF1073 * bit set if the channel was bus-off when it was last stopped (even1074 * across chip resets). This bit will clear shortly afterwards, without1075 * triggering a second unsolicited chip state event.1076 * Ignore this initial bus-off.1077 */1078 if (leaf->joining_bus) {1079 if (new_state == CAN_STATE_BUS_OFF) {1080 netdev_dbg(priv->netdev, "ignoring bus-off during startup");1081 new_state = cur_state;1082 } else {1083 leaf->joining_bus = false;1084 }1085 }1086 1087 if (new_state != cur_state) {1088 tx_state = (es->txerr >= es->rxerr) ? new_state : 0;1089 rx_state = (es->txerr <= es->rxerr) ? new_state : 0;1090 1091 can_change_state(priv->netdev, cf, tx_state, rx_state);1092 }1093 1094 if (priv->can.restart_ms &&1095 cur_state == CAN_STATE_BUS_OFF &&1096 new_state < CAN_STATE_BUS_OFF)1097 priv->can.can_stats.restarts++;1098 1099 switch (dev->driver_info->family) {1100 case KVASER_LEAF:1101 if (es->leaf.error_factor) {1102 priv->can.can_stats.bus_error++;1103 stats->rx_errors++;1104 }1105 break;1106 case KVASER_USBCAN:1107 if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR)1108 stats->tx_errors++;1109 if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR)1110 stats->rx_errors++;1111 if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR)1112 priv->can.can_stats.bus_error++;1113 break;1114 }1115 1116 priv->bec.txerr = es->txerr;1117 priv->bec.rxerr = es->rxerr;1118}1119 1120static void kvaser_usb_leaf_rx_error(const struct kvaser_usb *dev,1121 const struct kvaser_usb_err_summary *es)1122{1123 struct can_frame *cf;1124 struct can_frame tmp_cf = { .can_id = CAN_ERR_FLAG,1125 .len = CAN_ERR_DLC };1126 struct sk_buff *skb;1127 struct net_device_stats *stats;1128 struct kvaser_usb_net_priv *priv;1129 struct kvaser_usb_net_leaf_priv *leaf;1130 enum can_state old_state, new_state;1131 1132 if (es->channel >= dev->nchannels) {1133 dev_err(&dev->intf->dev,1134 "Invalid channel number (%d)\n", es->channel);1135 return;1136 }1137 1138 priv = dev->nets[es->channel];1139 leaf = priv->sub_priv;1140 stats = &priv->netdev->stats;1141 1142 /* Ignore e.g. state change to bus-off reported just after stopping */1143 if (!netif_running(priv->netdev))1144 return;1145 1146 /* Update all of the CAN interface's state and error counters before1147 * trying any memory allocation that can actually fail with -ENOMEM.1148 *1149 * We send a temporary stack-allocated error CAN frame to1150 * can_change_state() for the very same reason.1151 *1152 * TODO: Split can_change_state() responsibility between updating the1153 * CAN interface's state and counters, and the setting up of CAN error1154 * frame ID and data to userspace. Remove stack allocation afterwards.1155 */1156 old_state = priv->can.state;1157 kvaser_usb_leaf_rx_error_update_can_state(priv, es, &tmp_cf);1158 new_state = priv->can.state;1159 1160 /* If there are errors, request status updates periodically as we do1161 * not get automatic notifications of improved state.1162 * Also request updates if we saw a stale BUS_OFF during startup1163 * (joining_bus).1164 */1165 if (new_state < CAN_STATE_BUS_OFF &&1166 (es->rxerr || es->txerr || new_state == CAN_STATE_ERROR_PASSIVE ||1167 leaf->joining_bus))1168 schedule_delayed_work(&leaf->chip_state_req_work,1169 msecs_to_jiffies(500));1170 1171 skb = alloc_can_err_skb(priv->netdev, &cf);1172 if (!skb) {1173 stats->rx_dropped++;1174 return;1175 }1176 memcpy(cf, &tmp_cf, sizeof(*cf));1177 1178 if (new_state != old_state) {1179 if (es->status &1180 (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {1181 if (!priv->can.restart_ms)1182 kvaser_usb_leaf_simple_cmd_async(priv,1183 CMD_STOP_CHIP);1184 netif_carrier_off(priv->netdev);1185 }1186 1187 if (priv->can.restart_ms &&1188 old_state == CAN_STATE_BUS_OFF &&1189 new_state < CAN_STATE_BUS_OFF) {1190 cf->can_id |= CAN_ERR_RESTARTED;1191 netif_carrier_on(priv->netdev);1192 }1193 }1194 1195 switch (dev->driver_info->family) {1196 case KVASER_LEAF:1197 if (es->leaf.error_factor) {1198 cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT;1199 1200 if (es->leaf.error_factor & M16C_EF_ACKE)1201 cf->data[3] = CAN_ERR_PROT_LOC_ACK;1202 if (es->leaf.error_factor & M16C_EF_CRCE)1203 cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;1204 if (es->leaf.error_factor & M16C_EF_FORME)1205 cf->data[2] |= CAN_ERR_PROT_FORM;1206 if (es->leaf.error_factor & M16C_EF_STFE)1207 cf->data[2] |= CAN_ERR_PROT_STUFF;1208 if (es->leaf.error_factor & M16C_EF_BITE0)1209 cf->data[2] |= CAN_ERR_PROT_BIT0;1210 if (es->leaf.error_factor & M16C_EF_BITE1)1211 cf->data[2] |= CAN_ERR_PROT_BIT1;1212 if (es->leaf.error_factor & M16C_EF_TRE)1213 cf->data[2] |= CAN_ERR_PROT_TX;1214 }1215 break;1216 case KVASER_USBCAN:1217 if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR)1218 cf->can_id |= CAN_ERR_BUSERROR;1219 break;1220 }1221 1222 if (new_state != CAN_STATE_BUS_OFF) {1223 cf->can_id |= CAN_ERR_CNT;1224 cf->data[6] = es->txerr;1225 cf->data[7] = es->rxerr;1226 }1227 1228 netif_rx(skb);1229}1230 1231/* For USBCAN, report error to userspace if the channels's errors counter1232 * has changed, or we're the only channel seeing a bus error state.1233 */1234static void1235kvaser_usb_leaf_usbcan_conditionally_rx_error(const struct kvaser_usb *dev,1236 struct kvaser_usb_err_summary *es)1237{1238 struct kvaser_usb_net_priv *priv;1239 unsigned int channel;1240 bool report_error;1241 1242 channel = es->channel;1243 if (channel >= dev->nchannels) {1244 dev_err(&dev->intf->dev,1245 "Invalid channel number (%d)\n", channel);1246 return;1247 }1248 1249 priv = dev->nets[channel];1250 report_error = false;1251 1252 if (es->txerr != priv->bec.txerr) {1253 es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR;1254 report_error = true;1255 }1256 if (es->rxerr != priv->bec.rxerr) {1257 es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR;1258 report_error = true;1259 }1260 if ((es->status & M16C_STATE_BUS_ERROR) &&1261 !(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) {1262 es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR;1263 report_error = true;1264 }1265 1266 if (report_error)1267 kvaser_usb_leaf_rx_error(dev, es);1268}1269 1270static void kvaser_usb_leaf_usbcan_rx_error(const struct kvaser_usb *dev,1271 const struct kvaser_cmd *cmd)1272{1273 struct kvaser_usb_err_summary es = { };1274 1275 switch (cmd->id) {1276 /* Sometimes errors are sent as unsolicited chip state events */1277 case CMD_CHIP_STATE_EVENT:1278 es.channel = cmd->u.usbcan.chip_state_event.channel;1279 es.status = cmd->u.usbcan.chip_state_event.status;1280 es.txerr = cmd->u.usbcan.chip_state_event.tx_errors_count;1281 es.rxerr = cmd->u.usbcan.chip_state_event.rx_errors_count;1282 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);1283 break;1284 1285 case CMD_CAN_ERROR_EVENT:1286 es.channel = 0;1287 es.status = cmd->u.usbcan.can_error_event.status_ch0;1288 es.txerr = cmd->u.usbcan.can_error_event.tx_errors_count_ch0;1289 es.rxerr = cmd->u.usbcan.can_error_event.rx_errors_count_ch0;1290 es.usbcan.other_ch_status =1291 cmd->u.usbcan.can_error_event.status_ch1;1292 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);1293 1294 /* The USBCAN firmware supports up to 2 channels.1295 * Now that ch0 was checked, check if ch1 has any errors.1296 */1297 if (dev->nchannels == MAX_USBCAN_NET_DEVICES) {1298 es.channel = 1;1299 es.status = cmd->u.usbcan.can_error_event.status_ch1;1300 es.txerr =1301 cmd->u.usbcan.can_error_event.tx_errors_count_ch1;1302 es.rxerr =1303 cmd->u.usbcan.can_error_event.rx_errors_count_ch1;1304 es.usbcan.other_ch_status =1305 cmd->u.usbcan.can_error_event.status_ch0;1306 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);1307 }1308 break;1309 1310 default:1311 dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id);1312 }1313}1314 1315static void kvaser_usb_leaf_leaf_rx_error(const struct kvaser_usb *dev,1316 const struct kvaser_cmd *cmd)1317{1318 struct kvaser_usb_err_summary es = { };1319 1320 switch (cmd->id) {1321 case CMD_CAN_ERROR_EVENT:1322 es.channel = cmd->u.leaf.can_error_event.channel;1323 es.status = cmd->u.leaf.can_error_event.status;1324 es.txerr = cmd->u.leaf.can_error_event.tx_errors_count;1325 es.rxerr = cmd->u.leaf.can_error_event.rx_errors_count;1326 es.leaf.error_factor = cmd->u.leaf.can_error_event.error_factor;1327 break;1328 case CMD_LEAF_LOG_MESSAGE:1329 es.channel = cmd->u.leaf.log_message.channel;1330 es.status = cmd->u.leaf.log_message.data[0];1331 es.txerr = cmd->u.leaf.log_message.data[2];1332 es.rxerr = cmd->u.leaf.log_message.data[3];1333 es.leaf.error_factor = cmd->u.leaf.log_message.data[1];1334 break;1335 case CMD_CHIP_STATE_EVENT:1336 es.channel = cmd->u.leaf.chip_state_event.channel;1337 es.status = cmd->u.leaf.chip_state_event.status;1338 es.txerr = cmd->u.leaf.chip_state_event.tx_errors_count;1339 es.rxerr = cmd->u.leaf.chip_state_event.rx_errors_count;1340 es.leaf.error_factor = 0;1341 break;1342 default:1343 dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id);1344 return;1345 }1346 1347 kvaser_usb_leaf_rx_error(dev, &es);1348}1349 1350static void kvaser_usb_leaf_rx_can_err(const struct kvaser_usb_net_priv *priv,1351 const struct kvaser_cmd *cmd)1352{1353 if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |1354 MSG_FLAG_NERR)) {1355 struct net_device_stats *stats = &priv->netdev->stats;1356 1357 netdev_err(priv->netdev, "Unknown error (flags: 0x%02x)\n",1358 cmd->u.rx_can_header.flag);1359 1360 stats->rx_errors++;1361 return;1362 }1363 1364 if (cmd->u.rx_can_header.flag & MSG_FLAG_OVERRUN)1365 kvaser_usb_can_rx_over_error(priv->netdev);1366}1367 1368static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev,1369 const struct kvaser_cmd *cmd)1370{1371 struct kvaser_usb_net_priv *priv;1372 struct can_frame *cf;1373 struct sk_buff *skb;1374 struct net_device_stats *stats;1375 u8 channel = cmd->u.rx_can_header.channel;1376 const u8 *rx_data = NULL; /* GCC */1377 ktime_t hwtstamp = 0;1378 1379 if (channel >= dev->nchannels) {1380 dev_err(&dev->intf->dev,1381 "Invalid channel number (%d)\n", channel);1382 return;1383 }1384 1385 priv = dev->nets[channel];1386 stats = &priv->netdev->stats;1387 1388 if ((cmd->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) &&1389 (dev->driver_info->family == KVASER_LEAF &&1390 cmd->id == CMD_LEAF_LOG_MESSAGE)) {1391 kvaser_usb_leaf_leaf_rx_error(dev, cmd);1392 return;1393 } else if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |1394 MSG_FLAG_NERR |1395 MSG_FLAG_OVERRUN)) {1396 kvaser_usb_leaf_rx_can_err(priv, cmd);1397 return;1398 } else if (cmd->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) {1399 netdev_warn(priv->netdev,1400 "Unhandled frame (flags: 0x%02x)\n",1401 cmd->u.rx_can_header.flag);1402 return;1403 }1404 1405 switch (dev->driver_info->family) {1406 case KVASER_LEAF:1407 rx_data = cmd->u.leaf.rx_can.data;1408 hwtstamp = kvaser_usb_timestamp48_to_ktime(dev->cfg, cmd->u.leaf.rx_can.time);1409 break;1410 case KVASER_USBCAN:1411 rx_data = cmd->u.usbcan.rx_can.data;1412 hwtstamp = kvaser_usb_usbcan_timestamp_to_ktime(dev, cmd->u.usbcan.rx_can.time);1413 break;1414 }1415 1416 skb = alloc_can_skb(priv->netdev, &cf);1417 if (!skb) {1418 stats->rx_dropped++;1419 return;1420 }1421 1422 if (dev->driver_info->family == KVASER_LEAF && cmd->id ==1423 CMD_LEAF_LOG_MESSAGE) {1424 cf->can_id = le32_to_cpu(cmd->u.leaf.log_message.id);1425 if (cf->can_id & KVASER_EXTENDED_FRAME)1426 cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG;1427 else1428 cf->can_id &= CAN_SFF_MASK;1429 1430 can_frame_set_cc_len(cf, cmd->u.leaf.log_message.dlc & 0xF, priv->can.ctrlmode);1431 1432 if (cmd->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME)1433 cf->can_id |= CAN_RTR_FLAG;1434 else1435 memcpy(cf->data, &cmd->u.leaf.log_message.data,1436 cf->len);1437 } else {1438 cf->can_id = ((rx_data[0] & 0x1f) << 6) | (rx_data[1] & 0x3f);1439 1440 if (cmd->id == CMD_RX_EXT_MESSAGE) {1441 cf->can_id <<= 18;1442 cf->can_id |= ((rx_data[2] & 0x0f) << 14) |1443 ((rx_data[3] & 0xff) << 6) |1444 (rx_data[4] & 0x3f);1445 cf->can_id |= CAN_EFF_FLAG;1446 }1447 1448 can_frame_set_cc_len(cf, rx_data[5] & 0xF, priv->can.ctrlmode);1449 1450 if (cmd->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME)1451 cf->can_id |= CAN_RTR_FLAG;1452 else1453 memcpy(cf->data, &rx_data[6], cf->len);1454 }1455 1456 skb_hwtstamps(skb)->hwtstamp = hwtstamp;1457 stats->rx_packets++;1458 if (!(cf->can_id & CAN_RTR_FLAG))1459 stats->rx_bytes += cf->len;1460 netif_rx(skb);1461}1462 1463static void kvaser_usb_leaf_error_event_parameter(const struct kvaser_usb *dev,1464 const struct kvaser_cmd *cmd)1465{1466 u16 info1 = 0;1467 1468 switch (dev->driver_info->family) {1469 case KVASER_LEAF:1470 info1 = le16_to_cpu(cmd->u.leaf.error_event.info1);1471 break;1472 case KVASER_USBCAN:1473 info1 = le16_to_cpu(cmd->u.usbcan.error_event.info1);1474 break;1475 }1476 1477 /* info1 will contain the offending cmd_no */1478 switch (info1) {1479 case CMD_SET_CTRL_MODE:1480 dev_warn(&dev->intf->dev,1481 "CMD_SET_CTRL_MODE error in parameter\n");1482 break;1483 1484 case CMD_SET_BUS_PARAMS:1485 dev_warn(&dev->intf->dev,1486 "CMD_SET_BUS_PARAMS error in parameter\n");1487 break;1488 1489 default:1490 dev_warn(&dev->intf->dev,1491 "Unhandled parameter error event cmd_no (%u)\n",1492 info1);1493 break;1494 }1495}1496 1497static void kvaser_usb_leaf_error_event(const struct kvaser_usb *dev,1498 const struct kvaser_cmd *cmd)1499{1500 u8 error_code = 0;1501 1502 switch (dev->driver_info->family) {1503 case KVASER_LEAF:1504 error_code = cmd->u.leaf.error_event.error_code;1505 break;1506 case KVASER_USBCAN:1507 error_code = cmd->u.usbcan.error_event.error_code;1508 break;1509 }1510 1511 switch (error_code) {1512 case KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL:1513 /* Received additional CAN message, when firmware TX queue is1514 * already full. Something is wrong with the driver.1515 * This should never happen!1516 */1517 dev_err(&dev->intf->dev,1518 "Received error event TX_QUEUE_FULL\n");1519 break;1520 case KVASER_USB_LEAF_ERROR_EVENT_PARAM:1521 kvaser_usb_leaf_error_event_parameter(dev, cmd);1522 break;1523 1524 default:1525 dev_warn(&dev->intf->dev,1526 "Unhandled error event (%d)\n", error_code);1527 break;1528 }1529}1530 1531static void kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb *dev,1532 const struct kvaser_cmd *cmd)1533{1534 struct kvaser_usb_net_priv *priv;1535 u8 channel = cmd->u.simple.channel;1536 1537 if (channel >= dev->nchannels) {1538 dev_err(&dev->intf->dev,1539 "Invalid channel number (%d)\n", channel);1540 return;1541 }1542 1543 priv = dev->nets[channel];1544 1545 if (completion_done(&priv->start_comp) &&1546 netif_queue_stopped(priv->netdev)) {1547 netif_wake_queue(priv->netdev);1548 } else {1549 netif_start_queue(priv->netdev);1550 complete(&priv->start_comp);1551 }1552}1553 1554static void kvaser_usb_leaf_stop_chip_reply(const struct kvaser_usb *dev,1555 const struct kvaser_cmd *cmd)1556{1557 struct kvaser_usb_net_priv *priv;1558 u8 channel = cmd->u.simple.channel;1559 1560 if (channel >= dev->nchannels) {1561 dev_err(&dev->intf->dev,1562 "Invalid channel number (%d)\n", channel);1563 return;1564 }1565 1566 priv = dev->nets[channel];1567 1568 complete(&priv->stop_comp);1569}1570 1571static void kvaser_usb_leaf_get_busparams_reply(const struct kvaser_usb *dev,1572 const struct kvaser_cmd *cmd)1573{1574 struct kvaser_usb_net_priv *priv;1575 u8 channel = cmd->u.busparams.channel;1576 1577 if (channel >= dev->nchannels) {1578 dev_err(&dev->intf->dev,1579 "Invalid channel number (%d)\n", channel);1580 return;1581 }1582 1583 priv = dev->nets[channel];1584 memcpy(&priv->busparams_nominal, &cmd->u.busparams.busparams,1585 sizeof(priv->busparams_nominal));1586 1587 complete(&priv->get_busparams_comp);1588}1589 1590static void kvaser_usb_leaf_handle_command(struct kvaser_usb *dev,1591 const struct kvaser_cmd *cmd)1592{1593 if (kvaser_usb_leaf_verify_size(dev, cmd) < 0)1594 return;1595 1596 switch (cmd->id) {1597 case CMD_START_CHIP_REPLY:1598 kvaser_usb_leaf_start_chip_reply(dev, cmd);1599 break;1600 1601 case CMD_STOP_CHIP_REPLY:1602 kvaser_usb_leaf_stop_chip_reply(dev, cmd);1603 break;1604 1605 case CMD_RX_STD_MESSAGE:1606 case CMD_RX_EXT_MESSAGE:1607 kvaser_usb_leaf_rx_can_msg(dev, cmd);1608 break;1609 1610 case CMD_LEAF_LOG_MESSAGE:1611 if (dev->driver_info->family != KVASER_LEAF)1612 goto warn;1613 kvaser_usb_leaf_rx_can_msg(dev, cmd);1614 break;1615 1616 case CMD_CHIP_STATE_EVENT:1617 case CMD_CAN_ERROR_EVENT:1618 if (dev->driver_info->family == KVASER_LEAF)1619 kvaser_usb_leaf_leaf_rx_error(dev, cmd);1620 else1621 kvaser_usb_leaf_usbcan_rx_error(dev, cmd);1622 break;1623 1624 case CMD_TX_ACKNOWLEDGE:1625 kvaser_usb_leaf_tx_acknowledge(dev, cmd);1626 break;1627 1628 case CMD_ERROR_EVENT:1629 kvaser_usb_leaf_error_event(dev, cmd);1630 break;1631 1632 case CMD_GET_BUS_PARAMS_REPLY:1633 kvaser_usb_leaf_get_busparams_reply(dev, cmd);1634 break;1635 1636 case CMD_USBCAN_CLOCK_OVERFLOW_EVENT:1637 if (dev->driver_info->family != KVASER_USBCAN)1638 goto warn;1639 dev->card_data.usbcan_timestamp_msb =1640 le32_to_cpu(cmd->u.usbcan.clk_overflow_event.time) &1641 KVASER_USB_USBCAN_CLK_OVERFLOW_MASK;1642 break;1643 1644 /* Ignored commands */1645 case CMD_FLUSH_QUEUE_REPLY:1646 if (dev->driver_info->family != KVASER_LEAF)1647 goto warn;1648 break;1649 1650 default:1651warn: dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", cmd->id);1652 break;1653 }1654}1655 1656static void kvaser_usb_leaf_read_bulk_callback(struct kvaser_usb *dev,1657 void *buf, int len)1658{1659 struct kvaser_cmd *cmd;1660 int pos = 0;1661 1662 while (pos <= len - CMD_HEADER_LEN) {1663 cmd = buf + pos;1664 1665 /* The Kvaser firmware can only read and write commands that1666 * does not cross the USB's endpoint wMaxPacketSize boundary.1667 * If a follow-up command crosses such boundary, firmware puts1668 * a placeholder zero-length command in its place then aligns1669 * the real command to the next max packet size.1670 *1671 * Handle such cases or we're going to miss a significant1672 * number of events in case of a heavy rx load on the bus.1673 */1674 if (cmd->len == 0) {1675 pos = round_up(pos, le16_to_cpu1676 (dev->bulk_in->wMaxPacketSize));1677 continue;1678 }1679 1680 if (pos + cmd->len > len) {1681 dev_err_ratelimited(&dev->intf->dev, "Format error\n");1682 break;1683 }1684 1685 kvaser_usb_leaf_handle_command(dev, cmd);1686 pos += cmd->len;1687 }1688}1689 1690static int kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv *priv)1691{1692 struct kvaser_cmd *cmd;1693 int rc;1694 1695 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);1696 if (!cmd)1697 return -ENOMEM;1698 1699 cmd->id = CMD_SET_CTRL_MODE;1700 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_ctrl_mode);1701 cmd->u.ctrl_mode.tid = 0xff;1702 cmd->u.ctrl_mode.channel = priv->channel;1703 1704 if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)1705 cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT;1706 else1707 cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL;1708 1709 rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len);1710 1711 kfree(cmd);1712 return rc;1713}1714 1715static int kvaser_usb_leaf_start_chip(struct kvaser_usb_net_priv *priv)1716{1717 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;1718 int err;1719 1720 leaf->joining_bus = true;1721 1722 reinit_completion(&priv->start_comp);1723 1724 err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_START_CHIP,1725 priv->channel);1726 if (err)1727 return err;1728 1729 if (!wait_for_completion_timeout(&priv->start_comp,1730 msecs_to_jiffies(KVASER_USB_TIMEOUT)))1731 return -ETIMEDOUT;1732 1733 return 0;1734}1735 1736static int kvaser_usb_leaf_stop_chip(struct kvaser_usb_net_priv *priv)1737{1738 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;1739 int err;1740 1741 reinit_completion(&priv->stop_comp);1742 1743 cancel_delayed_work(&leaf->chip_state_req_work);1744 1745 err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_STOP_CHIP,1746 priv->channel);1747 if (err)1748 return err;1749 1750 if (!wait_for_completion_timeout(&priv->stop_comp,1751 msecs_to_jiffies(KVASER_USB_TIMEOUT)))1752 return -ETIMEDOUT;1753 1754 return 0;1755}1756 1757static int kvaser_usb_leaf_reset_chip(struct kvaser_usb *dev, int channel)1758{1759 return kvaser_usb_leaf_send_simple_cmd(dev, CMD_RESET_CHIP, channel);1760}1761 1762static int kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv *priv)1763{1764 struct kvaser_cmd *cmd;1765 int rc;1766 1767 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);1768 if (!cmd)1769 return -ENOMEM;1770 1771 cmd->id = CMD_FLUSH_QUEUE;1772 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_flush_queue);1773 cmd->u.flush_queue.channel = priv->channel;1774 cmd->u.flush_queue.flags = 0x00;1775 1776 rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len);1777 1778 kfree(cmd);1779 return rc;1780}1781 1782static int kvaser_usb_leaf_init_card(struct kvaser_usb *dev)1783{1784 struct kvaser_usb_dev_card_data *card_data = &dev->card_data;1785 1786 card_data->ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;1787 1788 return 0;1789}1790 1791static int kvaser_usb_leaf_init_channel(struct kvaser_usb_net_priv *priv)1792{1793 struct kvaser_usb_net_leaf_priv *leaf;1794 1795 leaf = devm_kzalloc(&priv->dev->intf->dev, sizeof(*leaf), GFP_KERNEL);1796 if (!leaf)1797 return -ENOMEM;1798 1799 leaf->net = priv;1800 INIT_DELAYED_WORK(&leaf->chip_state_req_work,1801 kvaser_usb_leaf_chip_state_req_work);1802 1803 priv->sub_priv = leaf;1804 1805 return 0;1806}1807 1808static void kvaser_usb_leaf_remove_channel(struct kvaser_usb_net_priv *priv)1809{1810 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;1811 1812 if (leaf)1813 cancel_delayed_work_sync(&leaf->chip_state_req_work);1814}1815 1816static int kvaser_usb_leaf_set_bittiming(const struct net_device *netdev,1817 const struct kvaser_usb_busparams *busparams)1818{1819 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);1820 struct kvaser_usb *dev = priv->dev;1821 struct kvaser_cmd *cmd;1822 int rc;1823 1824 cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);1825 if (!cmd)1826 return -ENOMEM;1827 1828 cmd->id = CMD_SET_BUS_PARAMS;1829 cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_busparams);1830 cmd->u.busparams.channel = priv->channel;1831 cmd->u.busparams.tid = 0xff;1832 memcpy(&cmd->u.busparams.busparams, busparams,1833 sizeof(cmd->u.busparams.busparams));1834 1835 rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);1836 1837 kfree(cmd);1838 return rc;1839}1840 1841static int kvaser_usb_leaf_get_busparams(struct kvaser_usb_net_priv *priv)1842{1843 int err;1844 1845 if (priv->dev->driver_info->family == KVASER_USBCAN)1846 return -EOPNOTSUPP;1847 1848 reinit_completion(&priv->get_busparams_comp);1849 1850 err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_GET_BUS_PARAMS,1851 priv->channel);1852 if (err)1853 return err;1854 1855 if (!wait_for_completion_timeout(&priv->get_busparams_comp,1856 msecs_to_jiffies(KVASER_USB_TIMEOUT)))1857 return -ETIMEDOUT;1858 1859 return 0;1860}1861 1862static int kvaser_usb_leaf_set_mode(struct net_device *netdev,1863 enum can_mode mode)1864{1865 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);1866 struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;1867 int err;1868 1869 switch (mode) {1870 case CAN_MODE_START:1871 kvaser_usb_unlink_tx_urbs(priv);1872 1873 leaf->joining_bus = true;1874 1875 err = kvaser_usb_leaf_simple_cmd_async(priv, CMD_START_CHIP);1876 if (err)1877 return err;1878 1879 priv->can.state = CAN_STATE_ERROR_ACTIVE;1880 break;1881 default:1882 return -EOPNOTSUPP;1883 }1884 1885 return 0;1886}1887 1888static int kvaser_usb_leaf_get_berr_counter(const struct net_device *netdev,1889 struct can_berr_counter *bec)1890{1891 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);1892 1893 *bec = priv->bec;1894 1895 return 0;1896}1897 1898static int kvaser_usb_leaf_setup_endpoints(struct kvaser_usb *dev)1899{1900 const struct usb_host_interface *iface_desc;1901 struct usb_endpoint_descriptor *endpoint;1902 int i;1903 1904 iface_desc = dev->intf->cur_altsetting;1905 1906 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {1907 endpoint = &iface_desc->endpoint[i].desc;1908 1909 if (!dev->bulk_in && usb_endpoint_is_bulk_in(endpoint))1910 dev->bulk_in = endpoint;1911 1912 if (!dev->bulk_out && usb_endpoint_is_bulk_out(endpoint))1913 dev->bulk_out = endpoint;1914 1915 /* use first bulk endpoint for in and out */1916 if (dev->bulk_in && dev->bulk_out)1917 return 0;1918 }1919 1920 return -ENODEV;1921}1922 1923const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops = {1924 .dev_set_mode = kvaser_usb_leaf_set_mode,1925 .dev_set_bittiming = kvaser_usb_leaf_set_bittiming,1926 .dev_get_busparams = kvaser_usb_leaf_get_busparams,1927 .dev_set_data_bittiming = NULL,1928 .dev_get_data_busparams = NULL,1929 .dev_get_berr_counter = kvaser_usb_leaf_get_berr_counter,1930 .dev_setup_endpoints = kvaser_usb_leaf_setup_endpoints,1931 .dev_init_card = kvaser_usb_leaf_init_card,1932 .dev_init_channel = kvaser_usb_leaf_init_channel,1933 .dev_remove_channel = kvaser_usb_leaf_remove_channel,1934 .dev_get_software_info = kvaser_usb_leaf_get_software_info,1935 .dev_get_software_details = NULL,1936 .dev_get_card_info = kvaser_usb_leaf_get_card_info,1937 .dev_get_capabilities = kvaser_usb_leaf_get_capabilities,1938 .dev_set_opt_mode = kvaser_usb_leaf_set_opt_mode,1939 .dev_start_chip = kvaser_usb_leaf_start_chip,1940 .dev_stop_chip = kvaser_usb_leaf_stop_chip,1941 .dev_reset_chip = kvaser_usb_leaf_reset_chip,1942 .dev_flush_queue = kvaser_usb_leaf_flush_queue,1943 .dev_read_bulk_callback = kvaser_usb_leaf_read_bulk_callback,1944 .dev_frame_to_cmd = kvaser_usb_leaf_frame_to_cmd,1945};1946