| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jimmy Assarsson | 4632 | 56.43% | 23 | 38.33% |
| Olivier Sobrie | 2159 | 26.30% | 4 | 6.67% |
| Anssi Hannula | 826 | 10.06% | 11 | 18.33% |
| Ahmed S. Darwish | 512 | 6.24% | 12 | 20.00% |
| Jonas Peterson | 45 | 0.55% | 1 | 1.67% |
| Vincent Mailhol | 14 | 0.17% | 2 | 3.33% |
| Oliver Hartkopp | 10 | 0.12% | 2 | 3.33% |
| Xiaolong Huang | 3 | 0.04% | 1 | 1.67% |
| Christopher R. Baker | 3 | 0.04% | 1 | 1.67% |
| Marc Kleine-Budde | 2 | 0.02% | 1 | 1.67% |
| Johan Hovold | 1 | 0.01% | 1 | 1.67% |
| Masanari Iida | 1 | 0.01% | 1 | 1.67% |
| Total | 8208 | 60 |
// SPDX-License-Identifier: GPL-2.0 /* Parts of this driver are based on the following: * - Kvaser linux leaf driver (version 4.78) * - CAN driver for esd CAN-USB/2 * - Kvaser linux usbcanII driver (version 5.3) * * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved. * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be> * Copyright (C) 2015 Valeo S.A. */ #include <linux/completion.h> #include <linux/device.h> #include <linux/gfp.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/netdevice.h> #include <linux/spinlock.h> #include <linux/string.h> #include <linux/types.h> #include <linux/units.h> #include <linux/usb.h> #include <linux/workqueue.h> #include <linux/can.h> #include <linux/can/dev.h> #include <linux/can/error.h> #include <linux/can/netlink.h> #include "kvaser_usb.h" #define MAX_USBCAN_NET_DEVICES 2 /* Command header size */ #define CMD_HEADER_LEN 2 /* Kvaser CAN message flags */ #define MSG_FLAG_ERROR_FRAME BIT(0) #define MSG_FLAG_OVERRUN BIT(1) #define MSG_FLAG_NERR BIT(2) #define MSG_FLAG_WAKEUP BIT(3) #define MSG_FLAG_REMOTE_FRAME BIT(4) #define MSG_FLAG_RESERVED BIT(5) #define MSG_FLAG_TX_ACK BIT(6) #define MSG_FLAG_TX_REQUEST BIT(7) /* CAN states (M16C CxSTRH register) */ #define M16C_STATE_BUS_RESET BIT(0) #define M16C_STATE_BUS_ERROR BIT(4) #define M16C_STATE_BUS_PASSIVE BIT(5) #define M16C_STATE_BUS_OFF BIT(6) /* Leaf/usbcan command ids */ #define CMD_RX_STD_MESSAGE 12 #define CMD_TX_STD_MESSAGE 13 #define CMD_RX_EXT_MESSAGE 14 #define CMD_TX_EXT_MESSAGE 15 #define CMD_SET_BUS_PARAMS 16 #define CMD_GET_BUS_PARAMS 17 #define CMD_GET_BUS_PARAMS_REPLY 18 #define CMD_GET_CHIP_STATE 19 #define CMD_CHIP_STATE_EVENT 20 #define CMD_SET_CTRL_MODE 21 #define CMD_RESET_CHIP 24 #define CMD_START_CHIP 26 #define CMD_START_CHIP_REPLY 27 #define CMD_STOP_CHIP 28 #define CMD_STOP_CHIP_REPLY 29 #define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 33 #define CMD_GET_CARD_INFO 34 #define CMD_GET_CARD_INFO_REPLY 35 #define CMD_GET_SOFTWARE_INFO 38 #define CMD_GET_SOFTWARE_INFO_REPLY 39 #define CMD_ERROR_EVENT 45 #define CMD_FLUSH_QUEUE 48 #define CMD_TX_ACKNOWLEDGE 50 #define CMD_CAN_ERROR_EVENT 51 #define CMD_FLUSH_QUEUE_REPLY 68 #define CMD_GET_CAPABILITIES_REQ 95 #define CMD_GET_CAPABILITIES_RESP 96 #define CMD_LEAF_LOG_MESSAGE 106 /* Leaf frequency options */ #define KVASER_USB_LEAF_SWOPTION_FREQ_MASK 0x60 #define KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK 0 #define KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK BIT(5) #define KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK BIT(6) #define KVASER_USB_LEAF_SWOPTION_EXT_CAP BIT(12) /* error factors */ #define M16C_EF_ACKE BIT(0) #define M16C_EF_CRCE BIT(1) #define M16C_EF_FORME BIT(2) #define M16C_EF_STFE BIT(3) #define M16C_EF_BITE0 BIT(4) #define M16C_EF_BITE1 BIT(5) #define M16C_EF_RCVE BIT(6) #define M16C_EF_TRE BIT(7) /* Only Leaf-based devices can report M16C error factors, * thus define our own error status flags for USBCANII */ #define USBCAN_ERROR_STATE_NONE 0 #define USBCAN_ERROR_STATE_TX_ERROR BIT(0) #define USBCAN_ERROR_STATE_RX_ERROR BIT(1) #define USBCAN_ERROR_STATE_BUSERROR BIT(2) /* ctrl modes */ #define KVASER_CTRL_MODE_NORMAL 1 #define KVASER_CTRL_MODE_SILENT 2 #define KVASER_CTRL_MODE_SELFRECEPTION 3 #define KVASER_CTRL_MODE_OFF 4 /* Extended CAN identifier flag */ #define KVASER_EXTENDED_FRAME BIT(31) struct kvaser_cmd_simple { u8 tid; u8 channel; } __packed; struct kvaser_cmd_cardinfo { u8 tid; u8 nchannels; __le32 serial_number; __le32 padding0; __le32 clock_resolution; __le32 mfgdate; u8 ean[8]; u8 hw_revision; union { struct { u8 usb_hs_mode; } __packed leaf1; struct { u8 padding; } __packed usbcan1; } __packed; __le16 padding1; } __packed; struct leaf_cmd_softinfo { u8 tid; u8 padding0; __le32 sw_options; __le32 fw_version; __le16 max_outstanding_tx; __le16 padding1[9]; } __packed; struct usbcan_cmd_softinfo { u8 tid; u8 fw_name[5]; __le16 max_outstanding_tx; u8 padding[6]; __le32 fw_version; __le16 checksum; __le16 sw_options; } __packed; struct kvaser_cmd_busparams { u8 tid; u8 channel; struct kvaser_usb_busparams busparams; } __packed; struct kvaser_cmd_tx_can { u8 channel; u8 tid; u8 data[14]; union { struct { u8 padding; u8 flags; } __packed leaf; struct { u8 flags; u8 padding; } __packed usbcan; } __packed; } __packed; struct kvaser_cmd_rx_can_header { u8 channel; u8 flag; } __packed; struct leaf_cmd_rx_can { u8 channel; u8 flag; __le16 time[3]; u8 data[14]; } __packed; struct usbcan_cmd_rx_can { u8 channel; u8 flag; u8 data[14]; __le16 time; } __packed; struct leaf_cmd_chip_state_event { u8 tid; u8 channel; __le16 time[3]; u8 tx_errors_count; u8 rx_errors_count; u8 status; u8 padding[3]; } __packed; struct usbcan_cmd_chip_state_event { u8 tid; u8 channel; u8 tx_errors_count; u8 rx_errors_count; __le16 time; u8 status; u8 padding[3]; } __packed; struct kvaser_cmd_tx_acknowledge_header { u8 channel; u8 tid; } __packed; struct leaf_cmd_can_error_event { u8 tid; u8 flags; __le16 time[3]; u8 channel; u8 padding; u8 tx_errors_count; u8 rx_errors_count; u8 status; u8 error_factor; } __packed; struct usbcan_cmd_can_error_event { u8 tid; u8 padding; u8 tx_errors_count_ch0; u8 rx_errors_count_ch0; u8 tx_errors_count_ch1; u8 rx_errors_count_ch1; u8 status_ch0; u8 status_ch1; __le16 time; } __packed; /* CMD_ERROR_EVENT error codes */ #define KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL 0x8 #define KVASER_USB_LEAF_ERROR_EVENT_PARAM 0x9 struct leaf_cmd_error_event { u8 tid; u8 error_code; __le16 timestamp[3]; __le16 padding; __le16 info1; __le16 info2; } __packed; struct usbcan_cmd_error_event { u8 tid; u8 error_code; __le16 info1; __le16 info2; __le16 timestamp; __le16 padding; } __packed; struct kvaser_cmd_ctrl_mode { u8 tid; u8 channel; u8 ctrl_mode; u8 padding[3]; } __packed; struct kvaser_cmd_flush_queue { u8 tid; u8 channel; u8 flags; u8 padding[3]; } __packed; struct leaf_cmd_log_message { u8 channel; u8 flags; __le16 time[3]; u8 dlc; u8 time_offset; __le32 id; u8 data[8]; } __packed; /* Sub commands for cap_req and cap_res */ #define KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE 0x02 #define KVASER_USB_LEAF_CAP_CMD_ERR_REPORT 0x05 struct kvaser_cmd_cap_req { __le16 padding0; __le16 cap_cmd; __le16 padding1; __le16 channel; } __packed; /* Status codes for cap_res */ #define KVASER_USB_LEAF_CAP_STAT_OK 0x00 #define KVASER_USB_LEAF_CAP_STAT_NOT_IMPL 0x01 #define KVASER_USB_LEAF_CAP_STAT_UNAVAIL 0x02 struct kvaser_cmd_cap_res { __le16 padding; __le16 cap_cmd; __le16 status; __le32 mask; __le32 value; } __packed; struct kvaser_cmd { u8 len; u8 id; union { struct kvaser_cmd_simple simple; struct kvaser_cmd_cardinfo cardinfo; struct kvaser_cmd_busparams busparams; struct kvaser_cmd_rx_can_header rx_can_header; struct kvaser_cmd_tx_acknowledge_header tx_acknowledge_header; union { struct leaf_cmd_softinfo softinfo; struct leaf_cmd_rx_can rx_can; struct leaf_cmd_chip_state_event chip_state_event; struct leaf_cmd_can_error_event can_error_event; struct leaf_cmd_log_message log_message; struct leaf_cmd_error_event error_event; struct kvaser_cmd_cap_req cap_req; struct kvaser_cmd_cap_res cap_res; } __packed leaf; union { struct usbcan_cmd_softinfo softinfo; struct usbcan_cmd_rx_can rx_can; struct usbcan_cmd_chip_state_event chip_state_event; struct usbcan_cmd_can_error_event can_error_event; struct usbcan_cmd_error_event error_event; } __packed usbcan; struct kvaser_cmd_tx_can tx_can; struct kvaser_cmd_ctrl_mode ctrl_mode; struct kvaser_cmd_flush_queue flush_queue; } u; } __packed; #define CMD_SIZE_ANY 0xff #define kvaser_fsize(field) sizeof_field(struct kvaser_cmd, field) static const u8 kvaser_usb_leaf_cmd_sizes_leaf[] = { [CMD_START_CHIP_REPLY] = kvaser_fsize(u.simple), [CMD_STOP_CHIP_REPLY] = kvaser_fsize(u.simple), [CMD_GET_CARD_INFO_REPLY] = kvaser_fsize(u.cardinfo), [CMD_TX_ACKNOWLEDGE] = kvaser_fsize(u.tx_acknowledge_header), [CMD_GET_SOFTWARE_INFO_REPLY] = kvaser_fsize(u.leaf.softinfo), [CMD_RX_STD_MESSAGE] = kvaser_fsize(u.leaf.rx_can), [CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.leaf.rx_can), [CMD_LEAF_LOG_MESSAGE] = kvaser_fsize(u.leaf.log_message), [CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.leaf.chip_state_event), [CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.leaf.can_error_event), [CMD_GET_CAPABILITIES_RESP] = kvaser_fsize(u.leaf.cap_res), [CMD_GET_BUS_PARAMS_REPLY] = kvaser_fsize(u.busparams), [CMD_ERROR_EVENT] = kvaser_fsize(u.leaf.error_event), /* ignored events: */ [CMD_FLUSH_QUEUE_REPLY] = CMD_SIZE_ANY, }; static const u8 kvaser_usb_leaf_cmd_sizes_usbcan[] = { [CMD_START_CHIP_REPLY] = kvaser_fsize(u.simple), [CMD_STOP_CHIP_REPLY] = kvaser_fsize(u.simple), [CMD_GET_CARD_INFO_REPLY] = kvaser_fsize(u.cardinfo), [CMD_TX_ACKNOWLEDGE] = kvaser_fsize(u.tx_acknowledge_header), [CMD_GET_SOFTWARE_INFO_REPLY] = kvaser_fsize(u.usbcan.softinfo), [CMD_RX_STD_MESSAGE] = kvaser_fsize(u.usbcan.rx_can), [CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.usbcan.rx_can), [CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.usbcan.chip_state_event), [CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.usbcan.can_error_event), [CMD_ERROR_EVENT] = kvaser_fsize(u.usbcan.error_event), /* ignored events: */ [CMD_USBCAN_CLOCK_OVERFLOW_EVENT] = CMD_SIZE_ANY, }; /* Summary of a kvaser error event, for a unified Leaf/Usbcan error * handling. Some discrepancies between the two families exist: * * - USBCAN firmware does not report M16C "error factors" * - USBCAN controllers has difficulties reporting if the raised error * event is for ch0 or ch1. They leave such arbitration to the OS * driver by letting it compare error counters with previous values * and decide the error event's channel. Thus for USBCAN, the channel * field is only advisory. */ struct kvaser_usb_err_summary { u8 channel, status, txerr, rxerr; union { struct { u8 error_factor; } leaf; struct { u8 other_ch_status; u8 error_state; } usbcan; }; }; struct kvaser_usb_net_leaf_priv { struct kvaser_usb_net_priv *net; struct delayed_work chip_state_req_work; /* started but not reported as bus-on yet */ bool joining_bus; }; static const struct can_bittiming_const kvaser_usb_leaf_m16c_bittiming_const = { .name = "kvaser_usb_ucii", .tseg1_min = 4, .tseg1_max = 16, .tseg2_min = 2, .tseg2_max = 8, .sjw_max = 4, .brp_min = 1, .brp_max = 16, .brp_inc = 1, }; static const struct can_bittiming_const kvaser_usb_leaf_m32c_bittiming_const = { .name = "kvaser_usb_leaf", .tseg1_min = 3, .tseg1_max = 16, .tseg2_min = 2, .tseg2_max = 8, .sjw_max = 4, .brp_min = 2, .brp_max = 128, .brp_inc = 2, }; static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_usbcan_dev_cfg = { .clock = { .freq = 8 * MEGA /* Hz */, }, .timestamp_freq = 1, .bittiming_const = &kvaser_usb_leaf_m16c_bittiming_const, }; static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg = { .clock = { .freq = 16 * MEGA /* Hz */, }, .timestamp_freq = 1, .bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const, }; static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_16mhz = { .clock = { .freq = 16 * MEGA /* Hz */, }, .timestamp_freq = 1, .bittiming_const = &kvaser_usb_flexc_bittiming_const, }; static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_24mhz = { .clock = { .freq = 24 * MEGA /* Hz */, }, .timestamp_freq = 1, .bittiming_const = &kvaser_usb_flexc_bittiming_const, }; static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_32mhz = { .clock = { .freq = 32 * MEGA /* Hz */, }, .timestamp_freq = 1, .bittiming_const = &kvaser_usb_flexc_bittiming_const, }; static int kvaser_usb_leaf_verify_size(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { /* buffer size >= cmd->len ensured by caller */ u8 min_size = 0; switch (dev->driver_info->family) { case KVASER_LEAF: if (cmd->id < ARRAY_SIZE(kvaser_usb_leaf_cmd_sizes_leaf)) min_size = kvaser_usb_leaf_cmd_sizes_leaf[cmd->id]; break; case KVASER_USBCAN: if (cmd->id < ARRAY_SIZE(kvaser_usb_leaf_cmd_sizes_usbcan)) min_size = kvaser_usb_leaf_cmd_sizes_usbcan[cmd->id]; break; } if (min_size == CMD_SIZE_ANY) return 0; if (min_size) { min_size += CMD_HEADER_LEN; if (cmd->len >= min_size) return 0; dev_err_ratelimited(&dev->intf->dev, "Received command %u too short (size %u, needed %u)", cmd->id, cmd->len, min_size); return -EIO; } dev_warn_ratelimited(&dev->intf->dev, "Unhandled command (%d, size %d)\n", cmd->id, cmd->len); return -EINVAL; } static void * kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv, const struct sk_buff *skb, int *cmd_len, u16 transid) { struct kvaser_usb *dev = priv->dev; struct kvaser_cmd *cmd; u8 *cmd_tx_can_flags = NULL; /* GCC */ struct can_frame *cf = (struct can_frame *)skb->data; cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC); if (cmd) { cmd->u.tx_can.tid = transid & 0xff; cmd->len = *cmd_len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_tx_can); cmd->u.tx_can.channel = priv->channel; switch (dev->driver_info->family) { case KVASER_LEAF: cmd_tx_can_flags = &cmd->u.tx_can.leaf.flags; break; case KVASER_USBCAN: cmd_tx_can_flags = &cmd->u.tx_can.usbcan.flags; break; } *cmd_tx_can_flags = 0; if (cf->can_id & CAN_EFF_FLAG) { cmd->id = CMD_TX_EXT_MESSAGE; cmd->u.tx_can.data[0] = (cf->can_id >> 24) & 0x1f; cmd->u.tx_can.data[1] = (cf->can_id >> 18) & 0x3f; cmd->u.tx_can.data[2] = (cf->can_id >> 14) & 0x0f; cmd->u.tx_can.data[3] = (cf->can_id >> 6) & 0xff; cmd->u.tx_can.data[4] = cf->can_id & 0x3f; } else { cmd->id = CMD_TX_STD_MESSAGE; cmd->u.tx_can.data[0] = (cf->can_id >> 6) & 0x1f; cmd->u.tx_can.data[1] = cf->can_id & 0x3f; } cmd->u.tx_can.data[5] = cf->len; memcpy(&cmd->u.tx_can.data[6], cf->data, cf->len); if (cf->can_id & CAN_RTR_FLAG) *cmd_tx_can_flags |= MSG_FLAG_REMOTE_FRAME; } return cmd; } static int kvaser_usb_leaf_wait_cmd(const struct kvaser_usb *dev, u8 id, struct kvaser_cmd *cmd) { struct kvaser_cmd *tmp; void *buf; int actual_len; int err; int pos; unsigned long to = jiffies + msecs_to_jiffies(KVASER_USB_TIMEOUT); buf = kzalloc(KVASER_USB_RX_BUFFER_SIZE, GFP_KERNEL); if (!buf) return -ENOMEM; do { err = kvaser_usb_recv_cmd(dev, buf, KVASER_USB_RX_BUFFER_SIZE, &actual_len); if (err < 0) goto end; pos = 0; while (pos <= actual_len - CMD_HEADER_LEN) { tmp = buf + pos; /* Handle commands crossing the USB endpoint max packet * size boundary. Check kvaser_usb_read_bulk_callback() * for further details. */ if (tmp->len == 0) { pos = round_up(pos, le16_to_cpu (dev->bulk_in->wMaxPacketSize)); continue; } if (pos + tmp->len > actual_len) { dev_err_ratelimited(&dev->intf->dev, "Format error\n"); break; } if (tmp->id == id) { memcpy(cmd, tmp, tmp->len); goto end; } pos += tmp->len; } } while (time_before(jiffies, to)); err = -EINVAL; end: kfree(buf); if (err == 0) err = kvaser_usb_leaf_verify_size(dev, cmd); return err; } static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev, u8 cmd_id, int channel) { struct kvaser_cmd *cmd; int rc; cmd = kmalloc(sizeof(*cmd), GFP_KERNEL); if (!cmd) return -ENOMEM; cmd->id = cmd_id; cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple); cmd->u.simple.channel = channel; cmd->u.simple.tid = 0xff; rc = kvaser_usb_send_cmd(dev, cmd, cmd->len); kfree(cmd); return rc; } static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev, const struct leaf_cmd_softinfo *softinfo) { u32 sw_options = le32_to_cpu(softinfo->sw_options); dev->fw_version = le32_to_cpu(softinfo->fw_version); dev->max_tx_urbs = le16_to_cpu(softinfo->max_outstanding_tx); if (sw_options & KVASER_USB_LEAF_SWOPTION_EXT_CAP) dev->card_data.capabilities |= KVASER_USB_CAP_EXT_CAP; if (dev->driver_info->quirks & KVASER_USB_QUIRK_IGNORE_CLK_FREQ) { /* Firmware expects bittiming parameters calculated for 16MHz * clock, regardless of the actual clock */ dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg; } else { switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) { case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK: dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_16mhz; break; case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK: dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_24mhz; break; case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK: dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_32mhz; break; } } } static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev) { struct kvaser_cmd cmd; int err; err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO, 0); if (err) return err; err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_REPLY, &cmd); if (err) return err; switch (dev->driver_info->family) { case KVASER_LEAF: kvaser_usb_leaf_get_software_info_leaf(dev, &cmd.u.leaf.softinfo); break; case KVASER_USBCAN: dev->fw_version = le32_to_cpu(cmd.u.usbcan.softinfo.fw_version); dev->max_tx_urbs = le16_to_cpu(cmd.u.usbcan.softinfo.max_outstanding_tx); dev->cfg = &kvaser_usb_leaf_usbcan_dev_cfg; break; } return 0; } static int kvaser_usb_leaf_get_software_info(struct kvaser_usb *dev) { int err; int retry = 3; /* On some x86 laptops, plugging a Kvaser device again after * an unplug makes the firmware always ignore the very first * command. For such a case, provide some room for retries * instead of completely exiting the driver. */ do { err = kvaser_usb_leaf_get_software_info_inner(dev); } while (--retry && err == -ETIMEDOUT); return err; } static int kvaser_usb_leaf_get_card_info(struct kvaser_usb *dev) { struct kvaser_cmd cmd; int err; err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_CARD_INFO, 0); if (err) return err; err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CARD_INFO_REPLY, &cmd); if (err) return err; dev->nchannels = cmd.u.cardinfo.nchannels; if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES || (dev->driver_info->family == KVASER_USBCAN && dev->nchannels > MAX_USBCAN_NET_DEVICES)) return -EINVAL; return 0; } static int kvaser_usb_leaf_get_single_capability(struct kvaser_usb *dev, u16 cap_cmd_req, u16 *status) { struct kvaser_usb_dev_card_data *card_data = &dev->card_data; struct kvaser_cmd *cmd; u32 value = 0; u32 mask = 0; u16 cap_cmd_res; int err; int i; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (!cmd) return -ENOMEM; cmd->id = CMD_GET_CAPABILITIES_REQ; cmd->u.leaf.cap_req.cap_cmd = cpu_to_le16(cap_cmd_req); cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_cap_req); err = kvaser_usb_send_cmd(dev, cmd, cmd->len); if (err) goto end; err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CAPABILITIES_RESP, cmd); if (err) goto end; *status = le16_to_cpu(cmd->u.leaf.cap_res.status); if (*status != KVASER_USB_LEAF_CAP_STAT_OK) goto end; cap_cmd_res = le16_to_cpu(cmd->u.leaf.cap_res.cap_cmd); switch (cap_cmd_res) { case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE: case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT: value = le32_to_cpu(cmd->u.leaf.cap_res.value); mask = le32_to_cpu(cmd->u.leaf.cap_res.mask); break; default: dev_warn(&dev->intf->dev, "Unknown capability command %u\n", cap_cmd_res); break; } for (i = 0; i < dev->nchannels; i++) { if (BIT(i) & (value & mask)) { switch (cap_cmd_res) { case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE: card_data->ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; break; case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT: card_data->capabilities |= KVASER_USB_CAP_BERR_CAP; break; } } } end: kfree(cmd); return err; } static int kvaser_usb_leaf_get_capabilities_leaf(struct kvaser_usb *dev) { int err; u16 status; if (!(dev->card_data.capabilities & KVASER_USB_CAP_EXT_CAP)) { dev_info(&dev->intf->dev, "No extended capability support. Upgrade device firmware.\n"); return 0; } err = kvaser_usb_leaf_get_single_capability(dev, KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE, &status); if (err) return err; if (status) dev_info(&dev->intf->dev, "KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE failed %u\n", status); err = kvaser_usb_leaf_get_single_capability(dev, KVASER_USB_LEAF_CAP_CMD_ERR_REPORT, &status); if (err) return err; if (status) dev_info(&dev->intf->dev, "KVASER_USB_LEAF_CAP_CMD_ERR_REPORT failed %u\n", status); return 0; } static int kvaser_usb_leaf_get_capabilities(struct kvaser_usb *dev) { int err = 0; if (dev->driver_info->family == KVASER_LEAF) err = kvaser_usb_leaf_get_capabilities_leaf(dev); return err; } static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { struct net_device_stats *stats; struct kvaser_usb_tx_urb_context *context; struct kvaser_usb_net_priv *priv; unsigned long flags; u8 channel, tid; channel = cmd->u.tx_acknowledge_header.channel; tid = cmd->u.tx_acknowledge_header.tid; if (channel >= dev->nchannels) { dev_err(&dev->intf->dev, "Invalid channel number (%d)\n", channel); return; } priv = dev->nets[channel]; if (!netif_device_present(priv->netdev)) return; stats = &priv->netdev->stats; context = &priv->tx_contexts[tid % dev->max_tx_urbs]; /* Sometimes the state change doesn't come after a bus-off event */ if (priv->can.restart_ms && priv->can.state == CAN_STATE_BUS_OFF) { struct sk_buff *skb; struct can_frame *cf; skb = alloc_can_err_skb(priv->netdev, &cf); if (skb) { cf->can_id |= CAN_ERR_RESTARTED; netif_rx(skb); } else { netdev_err(priv->netdev, "No memory left for err_skb\n"); } priv->can.can_stats.restarts++; netif_carrier_on(priv->netdev); priv->can.state = CAN_STATE_ERROR_ACTIVE; } spin_lock_irqsave(&priv->tx_contexts_lock, flags); stats->tx_packets++; stats->tx_bytes += can_get_echo_skb(priv->netdev, context->echo_index, NULL); context->echo_index = dev->max_tx_urbs; --priv->active_tx_contexts; netif_wake_queue(priv->netdev); spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); } static int kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv *priv, u8 cmd_id) { struct kvaser_cmd *cmd; int err; cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); if (!cmd) return -ENOMEM; cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple); cmd->id = cmd_id; cmd->u.simple.channel = priv->channel; err = kvaser_usb_send_cmd_async(priv, cmd, cmd->len); if (err) kfree(cmd); return err; } static void kvaser_usb_leaf_chip_state_req_work(struct work_struct *work) { struct kvaser_usb_net_leaf_priv *leaf = container_of(work, struct kvaser_usb_net_leaf_priv, chip_state_req_work.work); struct kvaser_usb_net_priv *priv = leaf->net; kvaser_usb_leaf_simple_cmd_async(priv, CMD_GET_CHIP_STATE); } static void kvaser_usb_leaf_rx_error_update_can_state(struct kvaser_usb_net_priv *priv, const struct kvaser_usb_err_summary *es, struct can_frame *cf) { struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv; struct kvaser_usb *dev = priv->dev; struct net_device_stats *stats = &priv->netdev->stats; enum can_state cur_state, new_state, tx_state, rx_state; netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status); new_state = priv->can.state; cur_state = priv->can.state; if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) { new_state = CAN_STATE_BUS_OFF; } else if (es->status & M16C_STATE_BUS_PASSIVE) { new_state = CAN_STATE_ERROR_PASSIVE; } else if ((es->status & M16C_STATE_BUS_ERROR) && cur_state >= CAN_STATE_BUS_OFF) { /* Guard against spurious error events after a busoff */ } else if (es->txerr >= 128 || es->rxerr >= 128) { new_state = CAN_STATE_ERROR_PASSIVE; } else if (es->txerr >= 96 || es->rxerr >= 96) { new_state = CAN_STATE_ERROR_WARNING; } else { new_state = CAN_STATE_ERROR_ACTIVE; } /* 0bfd:0124 FW 4.18.778 was observed to send the initial * CMD_CHIP_STATE_EVENT after CMD_START_CHIP with M16C_STATE_BUS_OFF * bit set if the channel was bus-off when it was last stopped (even * across chip resets). This bit will clear shortly afterwards, without * triggering a second unsolicited chip state event. * Ignore this initial bus-off. */ if (leaf->joining_bus) { if (new_state == CAN_STATE_BUS_OFF) { netdev_dbg(priv->netdev, "ignoring bus-off during startup"); new_state = cur_state; } else { leaf->joining_bus = false; } } if (new_state != cur_state) { tx_state = (es->txerr >= es->rxerr) ? new_state : 0; rx_state = (es->txerr <= es->rxerr) ? new_state : 0; can_change_state(priv->netdev, cf, tx_state, rx_state); } if (priv->can.restart_ms && cur_state == CAN_STATE_BUS_OFF && new_state < CAN_STATE_BUS_OFF) priv->can.can_stats.restarts++; switch (dev->driver_info->family) { case KVASER_LEAF: if (es->leaf.error_factor) { priv->can.can_stats.bus_error++; stats->rx_errors++; } break; case KVASER_USBCAN: if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR) stats->tx_errors++; if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR) stats->rx_errors++; if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) priv->can.can_stats.bus_error++; break; } priv->bec.txerr = es->txerr; priv->bec.rxerr = es->rxerr; } static void kvaser_usb_leaf_rx_error(const struct kvaser_usb *dev, const struct kvaser_usb_err_summary *es) { struct can_frame *cf; struct can_frame tmp_cf = { .can_id = CAN_ERR_FLAG, .len = CAN_ERR_DLC }; struct sk_buff *skb; struct net_device_stats *stats; struct kvaser_usb_net_priv *priv; struct kvaser_usb_net_leaf_priv *leaf; enum can_state old_state, new_state; if (es->channel >= dev->nchannels) { dev_err(&dev->intf->dev, "Invalid channel number (%d)\n", es->channel); return; } priv = dev->nets[es->channel]; leaf = priv->sub_priv; stats = &priv->netdev->stats; /* Ignore e.g. state change to bus-off reported just after stopping */ if (!netif_running(priv->netdev)) return; /* Update all of the CAN interface's state and error counters before * trying any memory allocation that can actually fail with -ENOMEM. * * We send a temporary stack-allocated error CAN frame to * can_change_state() for the very same reason. * * TODO: Split can_change_state() responsibility between updating the * CAN interface's state and counters, and the setting up of CAN error * frame ID and data to userspace. Remove stack allocation afterwards. */ old_state = priv->can.state; kvaser_usb_leaf_rx_error_update_can_state(priv, es, &tmp_cf); new_state = priv->can.state; /* If there are errors, request status updates periodically as we do * not get automatic notifications of improved state. * Also request updates if we saw a stale BUS_OFF during startup * (joining_bus). */ if (new_state < CAN_STATE_BUS_OFF && (es->rxerr || es->txerr || new_state == CAN_STATE_ERROR_PASSIVE || leaf->joining_bus)) schedule_delayed_work(&leaf->chip_state_req_work, msecs_to_jiffies(500)); skb = alloc_can_err_skb(priv->netdev, &cf); if (!skb) { stats->rx_dropped++; return; } memcpy(cf, &tmp_cf, sizeof(*cf)); if (new_state != old_state) { if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) { if (!priv->can.restart_ms) kvaser_usb_leaf_simple_cmd_async(priv, CMD_STOP_CHIP); netif_carrier_off(priv->netdev); } if (priv->can.restart_ms && old_state == CAN_STATE_BUS_OFF && new_state < CAN_STATE_BUS_OFF) { cf->can_id |= CAN_ERR_RESTARTED; netif_carrier_on(priv->netdev); } } switch (dev->driver_info->family) { case KVASER_LEAF: if (es->leaf.error_factor) { cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT; if (es->leaf.error_factor & M16C_EF_ACKE) cf->data[3] = CAN_ERR_PROT_LOC_ACK; if (es->leaf.error_factor & M16C_EF_CRCE) cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ; if (es->leaf.error_factor & M16C_EF_FORME) cf->data[2] |= CAN_ERR_PROT_FORM; if (es->leaf.error_factor & M16C_EF_STFE) cf->data[2] |= CAN_ERR_PROT_STUFF; if (es->leaf.error_factor & M16C_EF_BITE0) cf->data[2] |= CAN_ERR_PROT_BIT0; if (es->leaf.error_factor & M16C_EF_BITE1) cf->data[2] |= CAN_ERR_PROT_BIT1; if (es->leaf.error_factor & M16C_EF_TRE) cf->data[2] |= CAN_ERR_PROT_TX; } break; case KVASER_USBCAN: if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) cf->can_id |= CAN_ERR_BUSERROR; break; } if (new_state != CAN_STATE_BUS_OFF) { cf->can_id |= CAN_ERR_CNT; cf->data[6] = es->txerr; cf->data[7] = es->rxerr; } netif_rx(skb); } /* For USBCAN, report error to userspace if the channels's errors counter * has changed, or we're the only channel seeing a bus error state. */ static void kvaser_usb_leaf_usbcan_conditionally_rx_error(const struct kvaser_usb *dev, struct kvaser_usb_err_summary *es) { struct kvaser_usb_net_priv *priv; unsigned int channel; bool report_error; channel = es->channel; if (channel >= dev->nchannels) { dev_err(&dev->intf->dev, "Invalid channel number (%d)\n", channel); return; } priv = dev->nets[channel]; report_error = false; if (es->txerr != priv->bec.txerr) { es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR; report_error = true; } if (es->rxerr != priv->bec.rxerr) { es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR; report_error = true; } if ((es->status & M16C_STATE_BUS_ERROR) && !(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) { es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR; report_error = true; } if (report_error) kvaser_usb_leaf_rx_error(dev, es); } static void kvaser_usb_leaf_usbcan_rx_error(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { struct kvaser_usb_err_summary es = { }; switch (cmd->id) { /* Sometimes errors are sent as unsolicited chip state events */ case CMD_CHIP_STATE_EVENT: es.channel = cmd->u.usbcan.chip_state_event.channel; es.status = cmd->u.usbcan.chip_state_event.status; es.txerr = cmd->u.usbcan.chip_state_event.tx_errors_count; es.rxerr = cmd->u.usbcan.chip_state_event.rx_errors_count; kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es); break; case CMD_CAN_ERROR_EVENT: es.channel = 0; es.status = cmd->u.usbcan.can_error_event.status_ch0; es.txerr = cmd->u.usbcan.can_error_event.tx_errors_count_ch0; es.rxerr = cmd->u.usbcan.can_error_event.rx_errors_count_ch0; es.usbcan.other_ch_status = cmd->u.usbcan.can_error_event.status_ch1; kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es); /* The USBCAN firmware supports up to 2 channels. * Now that ch0 was checked, check if ch1 has any errors. */ if (dev->nchannels == MAX_USBCAN_NET_DEVICES) { es.channel = 1; es.status = cmd->u.usbcan.can_error_event.status_ch1; es.txerr = cmd->u.usbcan.can_error_event.tx_errors_count_ch1; es.rxerr = cmd->u.usbcan.can_error_event.rx_errors_count_ch1; es.usbcan.other_ch_status = cmd->u.usbcan.can_error_event.status_ch0; kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es); } break; default: dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id); } } static void kvaser_usb_leaf_leaf_rx_error(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { struct kvaser_usb_err_summary es = { }; switch (cmd->id) { case CMD_CAN_ERROR_EVENT: es.channel = cmd->u.leaf.can_error_event.channel; es.status = cmd->u.leaf.can_error_event.status; es.txerr = cmd->u.leaf.can_error_event.tx_errors_count; es.rxerr = cmd->u.leaf.can_error_event.rx_errors_count; es.leaf.error_factor = cmd->u.leaf.can_error_event.error_factor; break; case CMD_LEAF_LOG_MESSAGE: es.channel = cmd->u.leaf.log_message.channel; es.status = cmd->u.leaf.log_message.data[0]; es.txerr = cmd->u.leaf.log_message.data[2]; es.rxerr = cmd->u.leaf.log_message.data[3]; es.leaf.error_factor = cmd->u.leaf.log_message.data[1]; break; case CMD_CHIP_STATE_EVENT: es.channel = cmd->u.leaf.chip_state_event.channel; es.status = cmd->u.leaf.chip_state_event.status; es.txerr = cmd->u.leaf.chip_state_event.tx_errors_count; es.rxerr = cmd->u.leaf.chip_state_event.rx_errors_count; es.leaf.error_factor = 0; break; default: dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id); return; } kvaser_usb_leaf_rx_error(dev, &es); } static void kvaser_usb_leaf_rx_can_err(const struct kvaser_usb_net_priv *priv, const struct kvaser_cmd *cmd) { if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME | MSG_FLAG_NERR)) { struct net_device_stats *stats = &priv->netdev->stats; netdev_err(priv->netdev, "Unknown error (flags: 0x%02x)\n", cmd->u.rx_can_header.flag); stats->rx_errors++; return; } if (cmd->u.rx_can_header.flag & MSG_FLAG_OVERRUN) kvaser_usb_can_rx_over_error(priv->netdev); } static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { struct kvaser_usb_net_priv *priv; struct can_frame *cf; struct sk_buff *skb; struct net_device_stats *stats; u8 channel = cmd->u.rx_can_header.channel; const u8 *rx_data = NULL; /* GCC */ if (channel >= dev->nchannels) { dev_err(&dev->intf->dev, "Invalid channel number (%d)\n", channel); return; } priv = dev->nets[channel]; stats = &priv->netdev->stats; if ((cmd->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) && (dev->driver_info->family == KVASER_LEAF && cmd->id == CMD_LEAF_LOG_MESSAGE)) { kvaser_usb_leaf_leaf_rx_error(dev, cmd); return; } else if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME | MSG_FLAG_NERR | MSG_FLAG_OVERRUN)) { kvaser_usb_leaf_rx_can_err(priv, cmd); return; } else if (cmd->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) { netdev_warn(priv->netdev, "Unhandled frame (flags: 0x%02x)\n", cmd->u.rx_can_header.flag); return; } switch (dev->driver_info->family) { case KVASER_LEAF: rx_data = cmd->u.leaf.rx_can.data; break; case KVASER_USBCAN: rx_data = cmd->u.usbcan.rx_can.data; break; } skb = alloc_can_skb(priv->netdev, &cf); if (!skb) { stats->rx_dropped++; return; } if (dev->driver_info->family == KVASER_LEAF && cmd->id == CMD_LEAF_LOG_MESSAGE) { cf->can_id = le32_to_cpu(cmd->u.leaf.log_message.id); if (cf->can_id & KVASER_EXTENDED_FRAME) cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG; else cf->can_id &= CAN_SFF_MASK; cf->len = can_cc_dlc2len(cmd->u.leaf.log_message.dlc); if (cmd->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME) cf->can_id |= CAN_RTR_FLAG; else memcpy(cf->data, &cmd->u.leaf.log_message.data, cf->len); } else { cf->can_id = ((rx_data[0] & 0x1f) << 6) | (rx_data[1] & 0x3f); if (cmd->id == CMD_RX_EXT_MESSAGE) { cf->can_id <<= 18; cf->can_id |= ((rx_data[2] & 0x0f) << 14) | ((rx_data[3] & 0xff) << 6) | (rx_data[4] & 0x3f); cf->can_id |= CAN_EFF_FLAG; } cf->len = can_cc_dlc2len(rx_data[5]); if (cmd->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME) cf->can_id |= CAN_RTR_FLAG; else memcpy(cf->data, &rx_data[6], cf->len); } stats->rx_packets++; if (!(cf->can_id & CAN_RTR_FLAG)) stats->rx_bytes += cf->len; netif_rx(skb); } static void kvaser_usb_leaf_error_event_parameter(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { u16 info1 = 0; switch (dev->driver_info->family) { case KVASER_LEAF: info1 = le16_to_cpu(cmd->u.leaf.error_event.info1); break; case KVASER_USBCAN: info1 = le16_to_cpu(cmd->u.usbcan.error_event.info1); break; } /* info1 will contain the offending cmd_no */ switch (info1) { case CMD_SET_CTRL_MODE: dev_warn(&dev->intf->dev, "CMD_SET_CTRL_MODE error in parameter\n"); break; case CMD_SET_BUS_PARAMS: dev_warn(&dev->intf->dev, "CMD_SET_BUS_PARAMS error in parameter\n"); break; default: dev_warn(&dev->intf->dev, "Unhandled parameter error event cmd_no (%u)\n", info1); break; } } static void kvaser_usb_leaf_error_event(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { u8 error_code = 0; switch (dev->driver_info->family) { case KVASER_LEAF: error_code = cmd->u.leaf.error_event.error_code; break; case KVASER_USBCAN: error_code = cmd->u.usbcan.error_event.error_code; break; } switch (error_code) { case KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL: /* Received additional CAN message, when firmware TX queue is * already full. Something is wrong with the driver. * This should never happen! */ dev_err(&dev->intf->dev, "Received error event TX_QUEUE_FULL\n"); break; case KVASER_USB_LEAF_ERROR_EVENT_PARAM: kvaser_usb_leaf_error_event_parameter(dev, cmd); break; default: dev_warn(&dev->intf->dev, "Unhandled error event (%d)\n", error_code); break; } } static void kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { struct kvaser_usb_net_priv *priv; u8 channel = cmd->u.simple.channel; if (channel >= dev->nchannels) { dev_err(&dev->intf->dev, "Invalid channel number (%d)\n", channel); return; } priv = dev->nets[channel]; if (completion_done(&priv->start_comp) && netif_queue_stopped(priv->netdev)) { netif_wake_queue(priv->netdev); } else { netif_start_queue(priv->netdev); complete(&priv->start_comp); } } static void kvaser_usb_leaf_stop_chip_reply(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { struct kvaser_usb_net_priv *priv; u8 channel = cmd->u.simple.channel; if (channel >= dev->nchannels) { dev_err(&dev->intf->dev, "Invalid channel number (%d)\n", channel); return; } priv = dev->nets[channel]; complete(&priv->stop_comp); } static void kvaser_usb_leaf_get_busparams_reply(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { struct kvaser_usb_net_priv *priv; u8 channel = cmd->u.busparams.channel; if (channel >= dev->nchannels) { dev_err(&dev->intf->dev, "Invalid channel number (%d)\n", channel); return; } priv = dev->nets[channel]; memcpy(&priv->busparams_nominal, &cmd->u.busparams.busparams, sizeof(priv->busparams_nominal)); complete(&priv->get_busparams_comp); } static void kvaser_usb_leaf_handle_command(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { if (kvaser_usb_leaf_verify_size(dev, cmd) < 0) return; switch (cmd->id) { case CMD_START_CHIP_REPLY: kvaser_usb_leaf_start_chip_reply(dev, cmd); break; case CMD_STOP_CHIP_REPLY: kvaser_usb_leaf_stop_chip_reply(dev, cmd); break; case CMD_RX_STD_MESSAGE: case CMD_RX_EXT_MESSAGE: kvaser_usb_leaf_rx_can_msg(dev, cmd); break; case CMD_LEAF_LOG_MESSAGE: if (dev->driver_info->family != KVASER_LEAF) goto warn; kvaser_usb_leaf_rx_can_msg(dev, cmd); break; case CMD_CHIP_STATE_EVENT: case CMD_CAN_ERROR_EVENT: if (dev->driver_info->family == KVASER_LEAF) kvaser_usb_leaf_leaf_rx_error(dev, cmd); else kvaser_usb_leaf_usbcan_rx_error(dev, cmd); break; case CMD_TX_ACKNOWLEDGE: kvaser_usb_leaf_tx_acknowledge(dev, cmd); break; case CMD_ERROR_EVENT: kvaser_usb_leaf_error_event(dev, cmd); break; case CMD_GET_BUS_PARAMS_REPLY: kvaser_usb_leaf_get_busparams_reply(dev, cmd); break; /* Ignored commands */ case CMD_USBCAN_CLOCK_OVERFLOW_EVENT: if (dev->driver_info->family != KVASER_USBCAN) goto warn; break; case CMD_FLUSH_QUEUE_REPLY: if (dev->driver_info->family != KVASER_LEAF) goto warn; break; default: warn: dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", cmd->id); break; } } static void kvaser_usb_leaf_read_bulk_callback(struct kvaser_usb *dev, void *buf, int len) { struct kvaser_cmd *cmd; int pos = 0; while (pos <= len - CMD_HEADER_LEN) { cmd = buf + pos; /* The Kvaser firmware can only read and write commands that * does not cross the USB's endpoint wMaxPacketSize boundary. * If a follow-up command crosses such boundary, firmware puts * a placeholder zero-length command in its place then aligns * the real command to the next max packet size. * * Handle such cases or we're going to miss a significant * number of events in case of a heavy rx load on the bus. */ if (cmd->len == 0) { pos = round_up(pos, le16_to_cpu (dev->bulk_in->wMaxPacketSize)); continue; } if (pos + cmd->len > len) { dev_err_ratelimited(&dev->intf->dev, "Format error\n"); break; } kvaser_usb_leaf_handle_command(dev, cmd); pos += cmd->len; } } static int kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv *priv) { struct kvaser_cmd *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (!cmd) return -ENOMEM; cmd->id = CMD_SET_CTRL_MODE; cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_ctrl_mode); cmd->u.ctrl_mode.tid = 0xff; cmd->u.ctrl_mode.channel = priv->channel; if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT; else cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL; rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len); kfree(cmd); return rc; } static int kvaser_usb_leaf_start_chip(struct kvaser_usb_net_priv *priv) { struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv; int err; leaf->joining_bus = true; reinit_completion(&priv->start_comp); err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_START_CHIP, priv->channel); if (err) return err; if (!wait_for_completion_timeout(&priv->start_comp, msecs_to_jiffies(KVASER_USB_TIMEOUT))) return -ETIMEDOUT; return 0; } static int kvaser_usb_leaf_stop_chip(struct kvaser_usb_net_priv *priv) { struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv; int err; reinit_completion(&priv->stop_comp); cancel_delayed_work(&leaf->chip_state_req_work); err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_STOP_CHIP, priv->channel); if (err) return err; if (!wait_for_completion_timeout(&priv->stop_comp, msecs_to_jiffies(KVASER_USB_TIMEOUT))) return -ETIMEDOUT; return 0; } static int kvaser_usb_leaf_reset_chip(struct kvaser_usb *dev, int channel) { return kvaser_usb_leaf_send_simple_cmd(dev, CMD_RESET_CHIP, channel); } static int kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv *priv) { struct kvaser_cmd *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (!cmd) return -ENOMEM; cmd->id = CMD_FLUSH_QUEUE; cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_flush_queue); cmd->u.flush_queue.channel = priv->channel; cmd->u.flush_queue.flags = 0x00; rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len); kfree(cmd); return rc; } static int kvaser_usb_leaf_init_card(struct kvaser_usb *dev) { struct kvaser_usb_dev_card_data *card_data = &dev->card_data; card_data->ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; return 0; } static int kvaser_usb_leaf_init_channel(struct kvaser_usb_net_priv *priv) { struct kvaser_usb_net_leaf_priv *leaf; leaf = devm_kzalloc(&priv->dev->intf->dev, sizeof(*leaf), GFP_KERNEL); if (!leaf) return -ENOMEM; leaf->net = priv; INIT_DELAYED_WORK(&leaf->chip_state_req_work, kvaser_usb_leaf_chip_state_req_work); priv->sub_priv = leaf; return 0; } static void kvaser_usb_leaf_remove_channel(struct kvaser_usb_net_priv *priv) { struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv; if (leaf) cancel_delayed_work_sync(&leaf->chip_state_req_work); } static int kvaser_usb_leaf_set_bittiming(const struct net_device *netdev, const struct kvaser_usb_busparams *busparams) { struct kvaser_usb_net_priv *priv = netdev_priv(netdev); struct kvaser_usb *dev = priv->dev; struct kvaser_cmd *cmd; int rc; cmd = kmalloc(sizeof(*cmd), GFP_KERNEL); if (!cmd) return -ENOMEM; cmd->id = CMD_SET_BUS_PARAMS; cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_busparams); cmd->u.busparams.channel = priv->channel; cmd->u.busparams.tid = 0xff; memcpy(&cmd->u.busparams.busparams, busparams, sizeof(cmd->u.busparams.busparams)); rc = kvaser_usb_send_cmd(dev, cmd, cmd->len); kfree(cmd); return rc; } static int kvaser_usb_leaf_get_busparams(struct kvaser_usb_net_priv *priv) { int err; if (priv->dev->driver_info->family == KVASER_USBCAN) return -EOPNOTSUPP; reinit_completion(&priv->get_busparams_comp); err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_GET_BUS_PARAMS, priv->channel); if (err) return err; if (!wait_for_completion_timeout(&priv->get_busparams_comp, msecs_to_jiffies(KVASER_USB_TIMEOUT))) return -ETIMEDOUT; return 0; } static int kvaser_usb_leaf_set_mode(struct net_device *netdev, enum can_mode mode) { struct kvaser_usb_net_priv *priv = netdev_priv(netdev); struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv; int err; switch (mode) { case CAN_MODE_START: kvaser_usb_unlink_tx_urbs(priv); leaf->joining_bus = true; err = kvaser_usb_leaf_simple_cmd_async(priv, CMD_START_CHIP); if (err) return err; priv->can.state = CAN_STATE_ERROR_ACTIVE; break; default: return -EOPNOTSUPP; } return 0; } static int kvaser_usb_leaf_get_berr_counter(const struct net_device *netdev, struct can_berr_counter *bec) { struct kvaser_usb_net_priv *priv = netdev_priv(netdev); *bec = priv->bec; return 0; } static int kvaser_usb_leaf_setup_endpoints(struct kvaser_usb *dev) { const struct usb_host_interface *iface_desc; struct usb_endpoint_descriptor *endpoint; int i; iface_desc = dev->intf->cur_altsetting; for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { endpoint = &iface_desc->endpoint[i].desc; if (!dev->bulk_in && usb_endpoint_is_bulk_in(endpoint)) dev->bulk_in = endpoint; if (!dev->bulk_out && usb_endpoint_is_bulk_out(endpoint)) dev->bulk_out = endpoint; /* use first bulk endpoint for in and out */ if (dev->bulk_in && dev->bulk_out) return 0; } return -ENODEV; } const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops = { .dev_set_mode = kvaser_usb_leaf_set_mode, .dev_set_bittiming = kvaser_usb_leaf_set_bittiming, .dev_get_busparams = kvaser_usb_leaf_get_busparams, .dev_set_data_bittiming = NULL, .dev_get_data_busparams = NULL, .dev_get_berr_counter = kvaser_usb_leaf_get_berr_counter, .dev_setup_endpoints = kvaser_usb_leaf_setup_endpoints, .dev_init_card = kvaser_usb_leaf_init_card, .dev_init_channel = kvaser_usb_leaf_init_channel, .dev_remove_channel = kvaser_usb_leaf_remove_channel, .dev_get_software_info = kvaser_usb_leaf_get_software_info, .dev_get_software_details = NULL, .dev_get_card_info = kvaser_usb_leaf_get_card_info, .dev_get_capabilities = kvaser_usb_leaf_get_capabilities, .dev_set_opt_mode = kvaser_usb_leaf_set_opt_mode, .dev_start_chip = kvaser_usb_leaf_start_chip, .dev_stop_chip = kvaser_usb_leaf_stop_chip, .dev_reset_chip = kvaser_usb_leaf_reset_chip, .dev_flush_queue = kvaser_usb_leaf_flush_queue, .dev_read_bulk_callback = kvaser_usb_leaf_read_bulk_callback, .dev_frame_to_cmd = kvaser_usb_leaf_frame_to_cmd, };
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