2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License as
4 * published by the Free Software Foundation version 2.
6 * Parts of this driver are based on the following:
7 * - Kvaser linux leaf driver (version 4.78)
8 * - CAN driver for esd CAN-USB/2
9 * - Kvaser linux usbcanII driver (version 5.3)
11 * Copyright (C) 2002-2006 KVASER AB, Sweden. All rights reserved.
12 * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh
13 * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be>
14 * Copyright (C) 2015 Valeo S.A.
17 #include <linux/completion.h>
18 #include <linux/module.h>
19 #include <linux/netdevice.h>
20 #include <linux/usb.h>
22 #include <linux/can.h>
23 #include <linux/can/dev.h>
24 #include <linux/can/error.h>
26 #define MAX_TX_URBS 16
28 #define START_TIMEOUT 1000 /* msecs */
29 #define STOP_TIMEOUT 1000 /* msecs */
30 #define USB_SEND_TIMEOUT 1000 /* msecs */
31 #define USB_RECV_TIMEOUT 1000 /* msecs */
32 #define RX_BUFFER_SIZE 3072
33 #define CAN_USB_CLOCK 8000000
34 #define MAX_NET_DEVICES 3
35 #define MAX_USBCAN_NET_DEVICES 2
37 /* Kvaser Leaf USB devices */
38 #define KVASER_VENDOR_ID 0x0bfd
39 #define USB_LEAF_DEVEL_PRODUCT_ID 10
40 #define USB_LEAF_LITE_PRODUCT_ID 11
41 #define USB_LEAF_PRO_PRODUCT_ID 12
42 #define USB_LEAF_SPRO_PRODUCT_ID 14
43 #define USB_LEAF_PRO_LS_PRODUCT_ID 15
44 #define USB_LEAF_PRO_SWC_PRODUCT_ID 16
45 #define USB_LEAF_PRO_LIN_PRODUCT_ID 17
46 #define USB_LEAF_SPRO_LS_PRODUCT_ID 18
47 #define USB_LEAF_SPRO_SWC_PRODUCT_ID 19
48 #define USB_MEMO2_DEVEL_PRODUCT_ID 22
49 #define USB_MEMO2_HSHS_PRODUCT_ID 23
50 #define USB_UPRO_HSHS_PRODUCT_ID 24
51 #define USB_LEAF_LITE_GI_PRODUCT_ID 25
52 #define USB_LEAF_PRO_OBDII_PRODUCT_ID 26
53 #define USB_MEMO2_HSLS_PRODUCT_ID 27
54 #define USB_LEAF_LITE_CH_PRODUCT_ID 28
55 #define USB_BLACKBIRD_SPRO_PRODUCT_ID 29
56 #define USB_OEM_MERCURY_PRODUCT_ID 34
57 #define USB_OEM_LEAF_PRODUCT_ID 35
58 #define USB_CAN_R_PRODUCT_ID 39
59 #define USB_LEAF_LITE_V2_PRODUCT_ID 288
60 #define USB_MINI_PCIE_HS_PRODUCT_ID 289
62 static inline bool kvaser_is_leaf(const struct usb_device_id *id)
64 return id->idProduct >= USB_LEAF_DEVEL_PRODUCT_ID &&
65 id->idProduct <= USB_MINI_PCIE_HS_PRODUCT_ID;
68 /* Kvaser USBCan-II devices */
69 #define USB_USBCAN_REVB_PRODUCT_ID 2
70 #define USB_VCI2_PRODUCT_ID 3
71 #define USB_USBCAN2_PRODUCT_ID 4
72 #define USB_MEMORATOR_PRODUCT_ID 5
74 static inline bool kvaser_is_usbcan(const struct usb_device_id *id)
76 return id->idProduct >= USB_USBCAN_REVB_PRODUCT_ID &&
77 id->idProduct <= USB_MEMORATOR_PRODUCT_ID;
80 /* USB devices features */
81 #define KVASER_HAS_SILENT_MODE BIT(0)
82 #define KVASER_HAS_TXRX_ERRORS BIT(1)
84 /* Message header size */
85 #define MSG_HEADER_LEN 2
87 /* Can message flags */
88 #define MSG_FLAG_ERROR_FRAME BIT(0)
89 #define MSG_FLAG_OVERRUN BIT(1)
90 #define MSG_FLAG_NERR BIT(2)
91 #define MSG_FLAG_WAKEUP BIT(3)
92 #define MSG_FLAG_REMOTE_FRAME BIT(4)
93 #define MSG_FLAG_RESERVED BIT(5)
94 #define MSG_FLAG_TX_ACK BIT(6)
95 #define MSG_FLAG_TX_REQUEST BIT(7)
97 /* Can states (M16C CxSTRH register) */
98 #define M16C_STATE_BUS_RESET BIT(0)
99 #define M16C_STATE_BUS_ERROR BIT(4)
100 #define M16C_STATE_BUS_PASSIVE BIT(5)
101 #define M16C_STATE_BUS_OFF BIT(6)
104 #define CMD_RX_STD_MESSAGE 12
105 #define CMD_TX_STD_MESSAGE 13
106 #define CMD_RX_EXT_MESSAGE 14
107 #define CMD_TX_EXT_MESSAGE 15
108 #define CMD_SET_BUS_PARAMS 16
109 #define CMD_GET_BUS_PARAMS 17
110 #define CMD_GET_BUS_PARAMS_REPLY 18
111 #define CMD_GET_CHIP_STATE 19
112 #define CMD_CHIP_STATE_EVENT 20
113 #define CMD_SET_CTRL_MODE 21
114 #define CMD_GET_CTRL_MODE 22
115 #define CMD_GET_CTRL_MODE_REPLY 23
116 #define CMD_RESET_CHIP 24
117 #define CMD_RESET_CARD 25
118 #define CMD_START_CHIP 26
119 #define CMD_START_CHIP_REPLY 27
120 #define CMD_STOP_CHIP 28
121 #define CMD_STOP_CHIP_REPLY 29
123 #define CMD_LEAF_GET_CARD_INFO2 32
124 #define CMD_USBCAN_RESET_CLOCK 32
125 #define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 33
127 #define CMD_GET_CARD_INFO 34
128 #define CMD_GET_CARD_INFO_REPLY 35
129 #define CMD_GET_SOFTWARE_INFO 38
130 #define CMD_GET_SOFTWARE_INFO_REPLY 39
131 #define CMD_ERROR_EVENT 45
132 #define CMD_FLUSH_QUEUE 48
133 #define CMD_RESET_ERROR_COUNTER 49
134 #define CMD_TX_ACKNOWLEDGE 50
135 #define CMD_CAN_ERROR_EVENT 51
137 #define CMD_LEAF_USB_THROTTLE 77
138 #define CMD_LEAF_LOG_MESSAGE 106
141 #define M16C_EF_ACKE BIT(0)
142 #define M16C_EF_CRCE BIT(1)
143 #define M16C_EF_FORME BIT(2)
144 #define M16C_EF_STFE BIT(3)
145 #define M16C_EF_BITE0 BIT(4)
146 #define M16C_EF_BITE1 BIT(5)
147 #define M16C_EF_RCVE BIT(6)
148 #define M16C_EF_TRE BIT(7)
150 /* Only Leaf-based devices can report M16C error factors,
151 * thus define our own error status flags for USBCANII
153 #define USBCAN_ERROR_STATE_NONE 0
154 #define USBCAN_ERROR_STATE_TX_ERROR BIT(0)
155 #define USBCAN_ERROR_STATE_RX_ERROR BIT(1)
156 #define USBCAN_ERROR_STATE_BUSERROR BIT(2)
158 /* bittiming parameters */
159 #define KVASER_USB_TSEG1_MIN 1
160 #define KVASER_USB_TSEG1_MAX 16
161 #define KVASER_USB_TSEG2_MIN 1
162 #define KVASER_USB_TSEG2_MAX 8
163 #define KVASER_USB_SJW_MAX 4
164 #define KVASER_USB_BRP_MIN 1
165 #define KVASER_USB_BRP_MAX 64
166 #define KVASER_USB_BRP_INC 1
169 #define KVASER_CTRL_MODE_NORMAL 1
170 #define KVASER_CTRL_MODE_SILENT 2
171 #define KVASER_CTRL_MODE_SELFRECEPTION 3
172 #define KVASER_CTRL_MODE_OFF 4
174 /* Extended CAN identifier flag */
175 #define KVASER_EXTENDED_FRAME BIT(31)
177 /* Kvaser USB CAN dongles are divided into two major families:
178 * - Leaf: Based on Renesas M32C, running firmware labeled as 'filo'
179 * - UsbcanII: Based on Renesas M16C, running firmware labeled as 'helios'
181 enum kvaser_usb_family {
186 struct kvaser_msg_simple {
191 struct kvaser_msg_cardinfo {
196 __le32 serial_number;
200 __le32 serial_number_low;
201 __le32 serial_number_high;
204 __le32 clock_resolution;
219 struct kvaser_msg_cardinfo2 {
223 __le32 oem_unlock_code;
226 struct leaf_msg_softinfo {
231 __le16 max_outstanding_tx;
235 struct usbcan_msg_softinfo {
238 __le16 max_outstanding_tx;
245 struct kvaser_msg_busparams {
255 struct kvaser_msg_tx_can {
271 struct kvaser_msg_rx_can_header {
276 struct leaf_msg_rx_can {
284 struct usbcan_msg_rx_can {
292 struct leaf_msg_chip_state_event {
304 struct usbcan_msg_chip_state_event {
316 struct kvaser_msg_tx_acknowledge_header {
321 struct leaf_msg_tx_acknowledge {
330 struct usbcan_msg_tx_acknowledge {
338 struct leaf_msg_error_event {
350 struct usbcan_msg_error_event {
353 u8 tx_errors_count_ch0;
354 u8 rx_errors_count_ch0;
355 u8 tx_errors_count_ch1;
356 u8 rx_errors_count_ch1;
362 struct kvaser_msg_ctrl_mode {
369 struct kvaser_msg_flush_queue {
376 struct leaf_msg_log_message {
390 struct kvaser_msg_simple simple;
391 struct kvaser_msg_cardinfo cardinfo;
392 struct kvaser_msg_cardinfo2 cardinfo2;
393 struct kvaser_msg_busparams busparams;
395 struct kvaser_msg_rx_can_header rx_can_header;
396 struct kvaser_msg_tx_acknowledge_header tx_acknowledge_header;
399 struct leaf_msg_softinfo softinfo;
400 struct leaf_msg_rx_can rx_can;
401 struct leaf_msg_chip_state_event chip_state_event;
402 struct leaf_msg_tx_acknowledge tx_acknowledge;
403 struct leaf_msg_error_event error_event;
404 struct leaf_msg_log_message log_message;
408 struct usbcan_msg_softinfo softinfo;
409 struct usbcan_msg_rx_can rx_can;
410 struct usbcan_msg_chip_state_event chip_state_event;
411 struct usbcan_msg_tx_acknowledge tx_acknowledge;
412 struct usbcan_msg_error_event error_event;
415 struct kvaser_msg_tx_can tx_can;
416 struct kvaser_msg_ctrl_mode ctrl_mode;
417 struct kvaser_msg_flush_queue flush_queue;
421 /* Summary of a kvaser error event, for a unified Leaf/Usbcan error
422 * handling. Some discrepancies between the two families exist:
424 * - USBCAN firmware does not report M16C "error factors"
425 * - USBCAN controllers has difficulties reporting if the raised error
426 * event is for ch0 or ch1. They leave such arbitration to the OS
427 * driver by letting it compare error counters with previous values
428 * and decide the error event's channel. Thus for USBCAN, the channel
429 * field is only advisory.
431 struct kvaser_usb_error_summary {
432 u8 channel, status, txerr, rxerr;
444 struct kvaser_usb_tx_urb_context {
445 struct kvaser_usb_net_priv *priv;
451 struct usb_device *udev;
452 struct kvaser_usb_net_priv *nets[MAX_NET_DEVICES];
454 struct usb_endpoint_descriptor *bulk_in, *bulk_out;
455 struct usb_anchor rx_submitted;
458 unsigned int nchannels;
459 enum kvaser_usb_family family;
462 void *rxbuf[MAX_RX_URBS];
463 dma_addr_t rxbuf_dma[MAX_RX_URBS];
466 struct kvaser_usb_net_priv {
469 atomic_t active_tx_urbs;
470 struct usb_anchor tx_submitted;
471 struct kvaser_usb_tx_urb_context tx_contexts[MAX_TX_URBS];
473 struct completion start_comp, stop_comp;
475 struct kvaser_usb *dev;
476 struct net_device *netdev;
479 struct can_berr_counter bec;
482 static const struct usb_device_id kvaser_usb_table[] = {
483 /* Leaf family IDs */
484 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) },
485 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) },
486 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID),
487 .driver_info = KVASER_HAS_TXRX_ERRORS |
488 KVASER_HAS_SILENT_MODE },
489 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID),
490 .driver_info = KVASER_HAS_TXRX_ERRORS |
491 KVASER_HAS_SILENT_MODE },
492 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID),
493 .driver_info = KVASER_HAS_TXRX_ERRORS |
494 KVASER_HAS_SILENT_MODE },
495 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID),
496 .driver_info = KVASER_HAS_TXRX_ERRORS |
497 KVASER_HAS_SILENT_MODE },
498 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID),
499 .driver_info = KVASER_HAS_TXRX_ERRORS |
500 KVASER_HAS_SILENT_MODE },
501 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID),
502 .driver_info = KVASER_HAS_TXRX_ERRORS |
503 KVASER_HAS_SILENT_MODE },
504 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID),
505 .driver_info = KVASER_HAS_TXRX_ERRORS |
506 KVASER_HAS_SILENT_MODE },
507 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID),
508 .driver_info = KVASER_HAS_TXRX_ERRORS |
509 KVASER_HAS_SILENT_MODE },
510 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID),
511 .driver_info = KVASER_HAS_TXRX_ERRORS |
512 KVASER_HAS_SILENT_MODE },
513 { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID),
514 .driver_info = KVASER_HAS_TXRX_ERRORS },
515 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) },
516 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID),
517 .driver_info = KVASER_HAS_TXRX_ERRORS |
518 KVASER_HAS_SILENT_MODE },
519 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID),
520 .driver_info = KVASER_HAS_TXRX_ERRORS },
521 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID),
522 .driver_info = KVASER_HAS_TXRX_ERRORS },
523 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID),
524 .driver_info = KVASER_HAS_TXRX_ERRORS },
525 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID),
526 .driver_info = KVASER_HAS_TXRX_ERRORS },
527 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID),
528 .driver_info = KVASER_HAS_TXRX_ERRORS },
529 { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID),
530 .driver_info = KVASER_HAS_TXRX_ERRORS },
531 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID) },
532 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID) },
534 /* USBCANII family IDs */
535 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID),
536 .driver_info = KVASER_HAS_TXRX_ERRORS },
537 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID),
538 .driver_info = KVASER_HAS_TXRX_ERRORS },
539 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID),
540 .driver_info = KVASER_HAS_TXRX_ERRORS },
541 { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID),
542 .driver_info = KVASER_HAS_TXRX_ERRORS },
546 MODULE_DEVICE_TABLE(usb, kvaser_usb_table);
548 static inline int kvaser_usb_send_msg(const struct kvaser_usb *dev,
549 struct kvaser_msg *msg)
553 return usb_bulk_msg(dev->udev,
554 usb_sndbulkpipe(dev->udev,
555 dev->bulk_out->bEndpointAddress),
556 msg, msg->len, &actual_len,
560 static int kvaser_usb_wait_msg(const struct kvaser_usb *dev, u8 id,
561 struct kvaser_msg *msg)
563 struct kvaser_msg *tmp;
568 unsigned long to = jiffies + msecs_to_jiffies(USB_RECV_TIMEOUT);
570 buf = kzalloc(RX_BUFFER_SIZE, GFP_KERNEL);
575 err = usb_bulk_msg(dev->udev,
576 usb_rcvbulkpipe(dev->udev,
577 dev->bulk_in->bEndpointAddress),
578 buf, RX_BUFFER_SIZE, &actual_len,
584 while (pos <= actual_len - MSG_HEADER_LEN) {
590 if (pos + tmp->len > actual_len) {
591 dev_err(dev->udev->dev.parent,
597 memcpy(msg, tmp, tmp->len);
603 } while (time_before(jiffies, to));
613 static int kvaser_usb_send_simple_msg(const struct kvaser_usb *dev,
614 u8 msg_id, int channel)
616 struct kvaser_msg *msg;
619 msg = kmalloc(sizeof(*msg), GFP_KERNEL);
624 msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple);
625 msg->u.simple.channel = channel;
626 msg->u.simple.tid = 0xff;
628 rc = kvaser_usb_send_msg(dev, msg);
634 static int kvaser_usb_get_software_info(struct kvaser_usb *dev)
636 struct kvaser_msg msg;
639 err = kvaser_usb_send_simple_msg(dev, CMD_GET_SOFTWARE_INFO, 0);
643 err = kvaser_usb_wait_msg(dev, CMD_GET_SOFTWARE_INFO_REPLY, &msg);
647 switch (dev->family) {
649 dev->fw_version = le32_to_cpu(msg.u.leaf.softinfo.fw_version);
652 dev->fw_version = le32_to_cpu(msg.u.usbcan.softinfo.fw_version);
659 static int kvaser_usb_get_card_info(struct kvaser_usb *dev)
661 struct kvaser_msg msg;
664 err = kvaser_usb_send_simple_msg(dev, CMD_GET_CARD_INFO, 0);
668 err = kvaser_usb_wait_msg(dev, CMD_GET_CARD_INFO_REPLY, &msg);
672 dev->nchannels = msg.u.cardinfo.nchannels;
673 if ((dev->nchannels > MAX_NET_DEVICES) ||
674 (dev->family == KVASER_USBCAN &&
675 dev->nchannels > MAX_USBCAN_NET_DEVICES))
681 static void kvaser_usb_tx_acknowledge(const struct kvaser_usb *dev,
682 const struct kvaser_msg *msg)
684 struct net_device_stats *stats;
685 struct kvaser_usb_tx_urb_context *context;
686 struct kvaser_usb_net_priv *priv;
688 struct can_frame *cf;
691 channel = msg->u.tx_acknowledge_header.channel;
692 tid = msg->u.tx_acknowledge_header.tid;
694 if (channel >= dev->nchannels) {
695 dev_err(dev->udev->dev.parent,
696 "Invalid channel number (%d)\n", channel);
700 priv = dev->nets[channel];
702 if (!netif_device_present(priv->netdev))
705 stats = &priv->netdev->stats;
707 context = &priv->tx_contexts[tid % MAX_TX_URBS];
709 /* Sometimes the state change doesn't come after a bus-off event */
710 if (priv->can.restart_ms &&
711 (priv->can.state >= CAN_STATE_BUS_OFF)) {
712 skb = alloc_can_err_skb(priv->netdev, &cf);
714 cf->can_id |= CAN_ERR_RESTARTED;
717 stats->rx_bytes += cf->can_dlc;
720 netdev_err(priv->netdev,
721 "No memory left for err_skb\n");
724 priv->can.can_stats.restarts++;
725 netif_carrier_on(priv->netdev);
727 priv->can.state = CAN_STATE_ERROR_ACTIVE;
731 stats->tx_bytes += context->dlc;
732 can_get_echo_skb(priv->netdev, context->echo_index);
734 context->echo_index = MAX_TX_URBS;
735 atomic_dec(&priv->active_tx_urbs);
737 netif_wake_queue(priv->netdev);
740 static void kvaser_usb_simple_msg_callback(struct urb *urb)
742 struct net_device *netdev = urb->context;
744 kfree(urb->transfer_buffer);
747 netdev_warn(netdev, "urb status received: %d\n",
751 static int kvaser_usb_simple_msg_async(struct kvaser_usb_net_priv *priv,
754 struct kvaser_usb *dev = priv->dev;
755 struct net_device *netdev = priv->netdev;
756 struct kvaser_msg *msg;
761 urb = usb_alloc_urb(0, GFP_ATOMIC);
763 netdev_err(netdev, "No memory left for URBs\n");
767 buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC);
773 msg = (struct kvaser_msg *)buf;
774 msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple);
776 msg->u.simple.channel = priv->channel;
778 usb_fill_bulk_urb(urb, dev->udev,
779 usb_sndbulkpipe(dev->udev,
780 dev->bulk_out->bEndpointAddress),
782 kvaser_usb_simple_msg_callback, netdev);
783 usb_anchor_urb(urb, &priv->tx_submitted);
785 err = usb_submit_urb(urb, GFP_ATOMIC);
787 netdev_err(netdev, "Error transmitting URB\n");
788 usb_unanchor_urb(urb);
799 static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
803 usb_kill_anchored_urbs(&priv->tx_submitted);
804 atomic_set(&priv->active_tx_urbs, 0);
806 for (i = 0; i < MAX_TX_URBS; i++)
807 priv->tx_contexts[i].echo_index = MAX_TX_URBS;
810 static void kvaser_usb_rx_error_update_can_state(struct kvaser_usb_net_priv *priv,
811 const struct kvaser_usb_error_summary *es,
812 struct can_frame *cf)
814 struct kvaser_usb *dev = priv->dev;
815 struct net_device_stats *stats = &priv->netdev->stats;
816 enum can_state cur_state, new_state, tx_state, rx_state;
818 netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status);
820 new_state = cur_state = priv->can.state;
822 if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET))
823 new_state = CAN_STATE_BUS_OFF;
824 else if (es->status & M16C_STATE_BUS_PASSIVE)
825 new_state = CAN_STATE_ERROR_PASSIVE;
826 else if (es->status & M16C_STATE_BUS_ERROR) {
827 /* Guard against spurious error events after a busoff */
828 if (cur_state < CAN_STATE_BUS_OFF) {
829 if ((es->txerr >= 128) || (es->rxerr >= 128))
830 new_state = CAN_STATE_ERROR_PASSIVE;
831 else if ((es->txerr >= 96) || (es->rxerr >= 96))
832 new_state = CAN_STATE_ERROR_WARNING;
833 else if (cur_state > CAN_STATE_ERROR_ACTIVE)
834 new_state = CAN_STATE_ERROR_ACTIVE;
839 new_state = CAN_STATE_ERROR_ACTIVE;
841 if (new_state != cur_state) {
842 tx_state = (es->txerr >= es->rxerr) ? new_state : 0;
843 rx_state = (es->txerr <= es->rxerr) ? new_state : 0;
845 can_change_state(priv->netdev, cf, tx_state, rx_state);
848 if (priv->can.restart_ms &&
849 (cur_state >= CAN_STATE_BUS_OFF) &&
850 (new_state < CAN_STATE_BUS_OFF)) {
851 priv->can.can_stats.restarts++;
854 switch (dev->family) {
856 if (es->leaf.error_factor) {
857 priv->can.can_stats.bus_error++;
862 if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR)
864 if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR)
866 if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) {
867 priv->can.can_stats.bus_error++;
872 priv->bec.txerr = es->txerr;
873 priv->bec.rxerr = es->rxerr;
876 static void kvaser_usb_rx_error(const struct kvaser_usb *dev,
877 const struct kvaser_usb_error_summary *es)
879 struct can_frame *cf, tmp_cf = { .can_id = CAN_ERR_FLAG, .can_dlc = CAN_ERR_DLC };
881 struct net_device_stats *stats;
882 struct kvaser_usb_net_priv *priv;
883 enum can_state old_state, new_state;
885 if (es->channel >= dev->nchannels) {
886 dev_err(dev->udev->dev.parent,
887 "Invalid channel number (%d)\n", es->channel);
891 priv = dev->nets[es->channel];
892 stats = &priv->netdev->stats;
894 /* Update all of the can interface's state and error counters before
895 * trying any memory allocation that can actually fail with -ENOMEM.
897 * We send a temporary stack-allocated error can frame to
898 * can_change_state() for the very same reason.
900 * TODO: Split can_change_state() responsibility between updating the
901 * can interface's state and counters, and the setting up of can error
902 * frame ID and data to userspace. Remove stack allocation afterwards.
904 old_state = priv->can.state;
905 kvaser_usb_rx_error_update_can_state(priv, es, &tmp_cf);
906 new_state = priv->can.state;
908 skb = alloc_can_err_skb(priv->netdev, &cf);
913 memcpy(cf, &tmp_cf, sizeof(*cf));
915 if (new_state != old_state) {
917 (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {
918 if (!priv->can.restart_ms)
919 kvaser_usb_simple_msg_async(priv, CMD_STOP_CHIP);
920 netif_carrier_off(priv->netdev);
923 if (priv->can.restart_ms &&
924 (old_state >= CAN_STATE_BUS_OFF) &&
925 (new_state < CAN_STATE_BUS_OFF)) {
926 cf->can_id |= CAN_ERR_RESTARTED;
927 netif_carrier_on(priv->netdev);
931 switch (dev->family) {
933 if (es->leaf.error_factor) {
934 cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT;
936 if (es->leaf.error_factor & M16C_EF_ACKE)
937 cf->data[3] |= (CAN_ERR_PROT_LOC_ACK);
938 if (es->leaf.error_factor & M16C_EF_CRCE)
939 cf->data[3] |= (CAN_ERR_PROT_LOC_CRC_SEQ |
940 CAN_ERR_PROT_LOC_CRC_DEL);
941 if (es->leaf.error_factor & M16C_EF_FORME)
942 cf->data[2] |= CAN_ERR_PROT_FORM;
943 if (es->leaf.error_factor & M16C_EF_STFE)
944 cf->data[2] |= CAN_ERR_PROT_STUFF;
945 if (es->leaf.error_factor & M16C_EF_BITE0)
946 cf->data[2] |= CAN_ERR_PROT_BIT0;
947 if (es->leaf.error_factor & M16C_EF_BITE1)
948 cf->data[2] |= CAN_ERR_PROT_BIT1;
949 if (es->leaf.error_factor & M16C_EF_TRE)
950 cf->data[2] |= CAN_ERR_PROT_TX;
954 if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) {
955 cf->can_id |= CAN_ERR_BUSERROR;
960 cf->data[6] = es->txerr;
961 cf->data[7] = es->rxerr;
964 stats->rx_bytes += cf->can_dlc;
968 /* For USBCAN, report error to userspace iff the channels's errors counter
969 * has changed, or we're the only channel seeing a bus error state.
971 static void kvaser_usbcan_conditionally_rx_error(const struct kvaser_usb *dev,
972 struct kvaser_usb_error_summary *es)
974 struct kvaser_usb_net_priv *priv;
978 channel = es->channel;
979 if (channel >= dev->nchannels) {
980 dev_err(dev->udev->dev.parent,
981 "Invalid channel number (%d)\n", channel);
985 priv = dev->nets[channel];
986 report_error = false;
988 if (es->txerr != priv->bec.txerr) {
989 es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR;
992 if (es->rxerr != priv->bec.rxerr) {
993 es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR;
996 if ((es->status & M16C_STATE_BUS_ERROR) &&
997 !(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) {
998 es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR;
1003 kvaser_usb_rx_error(dev, es);
1006 static void kvaser_usbcan_rx_error(const struct kvaser_usb *dev,
1007 const struct kvaser_msg *msg)
1009 struct kvaser_usb_error_summary es = { };
1012 /* Sometimes errors are sent as unsolicited chip state events */
1013 case CMD_CHIP_STATE_EVENT:
1014 es.channel = msg->u.usbcan.chip_state_event.channel;
1015 es.status = msg->u.usbcan.chip_state_event.status;
1016 es.txerr = msg->u.usbcan.chip_state_event.tx_errors_count;
1017 es.rxerr = msg->u.usbcan.chip_state_event.rx_errors_count;
1018 kvaser_usbcan_conditionally_rx_error(dev, &es);
1021 case CMD_CAN_ERROR_EVENT:
1023 es.status = msg->u.usbcan.error_event.status_ch0;
1024 es.txerr = msg->u.usbcan.error_event.tx_errors_count_ch0;
1025 es.rxerr = msg->u.usbcan.error_event.rx_errors_count_ch0;
1026 es.usbcan.other_ch_status =
1027 msg->u.usbcan.error_event.status_ch1;
1028 kvaser_usbcan_conditionally_rx_error(dev, &es);
1030 /* The USBCAN firmware supports up to 2 channels.
1031 * Now that ch0 was checked, check if ch1 has any errors.
1033 if (dev->nchannels == MAX_USBCAN_NET_DEVICES) {
1035 es.status = msg->u.usbcan.error_event.status_ch1;
1036 es.txerr = msg->u.usbcan.error_event.tx_errors_count_ch1;
1037 es.rxerr = msg->u.usbcan.error_event.rx_errors_count_ch1;
1038 es.usbcan.other_ch_status =
1039 msg->u.usbcan.error_event.status_ch0;
1040 kvaser_usbcan_conditionally_rx_error(dev, &es);
1045 dev_err(dev->udev->dev.parent, "Invalid msg id (%d)\n",
1050 static void kvaser_leaf_rx_error(const struct kvaser_usb *dev,
1051 const struct kvaser_msg *msg)
1053 struct kvaser_usb_error_summary es = { };
1056 case CMD_CAN_ERROR_EVENT:
1057 es.channel = msg->u.leaf.error_event.channel;
1058 es.status = msg->u.leaf.error_event.status;
1059 es.txerr = msg->u.leaf.error_event.tx_errors_count;
1060 es.rxerr = msg->u.leaf.error_event.rx_errors_count;
1061 es.leaf.error_factor = msg->u.leaf.error_event.error_factor;
1063 case CMD_LEAF_LOG_MESSAGE:
1064 es.channel = msg->u.leaf.log_message.channel;
1065 es.status = msg->u.leaf.log_message.data[0];
1066 es.txerr = msg->u.leaf.log_message.data[2];
1067 es.rxerr = msg->u.leaf.log_message.data[3];
1068 es.leaf.error_factor = msg->u.leaf.log_message.data[1];
1070 case CMD_CHIP_STATE_EVENT:
1071 es.channel = msg->u.leaf.chip_state_event.channel;
1072 es.status = msg->u.leaf.chip_state_event.status;
1073 es.txerr = msg->u.leaf.chip_state_event.tx_errors_count;
1074 es.rxerr = msg->u.leaf.chip_state_event.rx_errors_count;
1075 es.leaf.error_factor = 0;
1078 dev_err(dev->udev->dev.parent, "Invalid msg id (%d)\n",
1083 kvaser_usb_rx_error(dev, &es);
1086 static void kvaser_usb_rx_can_err(const struct kvaser_usb_net_priv *priv,
1087 const struct kvaser_msg *msg)
1089 struct can_frame *cf;
1090 struct sk_buff *skb;
1091 struct net_device_stats *stats = &priv->netdev->stats;
1093 if (msg->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |
1095 netdev_err(priv->netdev, "Unknow error (flags: 0x%02x)\n",
1096 msg->u.rx_can_header.flag);
1102 if (msg->u.rx_can_header.flag & MSG_FLAG_OVERRUN) {
1103 stats->rx_over_errors++;
1106 skb = alloc_can_err_skb(priv->netdev, &cf);
1108 stats->rx_dropped++;
1112 cf->can_id |= CAN_ERR_CRTL;
1113 cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
1115 stats->rx_packets++;
1116 stats->rx_bytes += cf->can_dlc;
1121 static void kvaser_usb_rx_can_msg(const struct kvaser_usb *dev,
1122 const struct kvaser_msg *msg)
1124 struct kvaser_usb_net_priv *priv;
1125 struct can_frame *cf;
1126 struct sk_buff *skb;
1127 struct net_device_stats *stats;
1128 u8 channel = msg->u.rx_can_header.channel;
1129 const u8 *rx_msg = NULL; /* GCC */
1131 if (channel >= dev->nchannels) {
1132 dev_err(dev->udev->dev.parent,
1133 "Invalid channel number (%d)\n", channel);
1137 priv = dev->nets[channel];
1138 stats = &priv->netdev->stats;
1140 if ((msg->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) &&
1141 (dev->family == KVASER_LEAF && msg->id == CMD_LEAF_LOG_MESSAGE)) {
1142 kvaser_leaf_rx_error(dev, msg);
1144 } else if (msg->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |
1146 MSG_FLAG_OVERRUN)) {
1147 kvaser_usb_rx_can_err(priv, msg);
1149 } else if (msg->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) {
1150 netdev_warn(priv->netdev,
1151 "Unhandled frame (flags: 0x%02x)",
1152 msg->u.rx_can_header.flag);
1156 switch (dev->family) {
1158 rx_msg = msg->u.leaf.rx_can.msg;
1161 rx_msg = msg->u.usbcan.rx_can.msg;
1165 skb = alloc_can_skb(priv->netdev, &cf);
1167 stats->tx_dropped++;
1171 if (dev->family == KVASER_LEAF && msg->id == CMD_LEAF_LOG_MESSAGE) {
1172 cf->can_id = le32_to_cpu(msg->u.leaf.log_message.id);
1173 if (cf->can_id & KVASER_EXTENDED_FRAME)
1174 cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG;
1176 cf->can_id &= CAN_SFF_MASK;
1178 cf->can_dlc = get_can_dlc(msg->u.leaf.log_message.dlc);
1180 if (msg->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME)
1181 cf->can_id |= CAN_RTR_FLAG;
1183 memcpy(cf->data, &msg->u.leaf.log_message.data,
1186 cf->can_id = ((rx_msg[0] & 0x1f) << 6) | (rx_msg[1] & 0x3f);
1188 if (msg->id == CMD_RX_EXT_MESSAGE) {
1190 cf->can_id |= ((rx_msg[2] & 0x0f) << 14) |
1191 ((rx_msg[3] & 0xff) << 6) |
1193 cf->can_id |= CAN_EFF_FLAG;
1196 cf->can_dlc = get_can_dlc(rx_msg[5]);
1198 if (msg->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME)
1199 cf->can_id |= CAN_RTR_FLAG;
1201 memcpy(cf->data, &rx_msg[6],
1205 stats->rx_packets++;
1206 stats->rx_bytes += cf->can_dlc;
1210 static void kvaser_usb_start_chip_reply(const struct kvaser_usb *dev,
1211 const struct kvaser_msg *msg)
1213 struct kvaser_usb_net_priv *priv;
1214 u8 channel = msg->u.simple.channel;
1216 if (channel >= dev->nchannels) {
1217 dev_err(dev->udev->dev.parent,
1218 "Invalid channel number (%d)\n", channel);
1222 priv = dev->nets[channel];
1224 if (completion_done(&priv->start_comp) &&
1225 netif_queue_stopped(priv->netdev)) {
1226 netif_wake_queue(priv->netdev);
1228 netif_start_queue(priv->netdev);
1229 complete(&priv->start_comp);
1233 static void kvaser_usb_stop_chip_reply(const struct kvaser_usb *dev,
1234 const struct kvaser_msg *msg)
1236 struct kvaser_usb_net_priv *priv;
1237 u8 channel = msg->u.simple.channel;
1239 if (channel >= dev->nchannels) {
1240 dev_err(dev->udev->dev.parent,
1241 "Invalid channel number (%d)\n", channel);
1245 priv = dev->nets[channel];
1247 complete(&priv->stop_comp);
1250 static void kvaser_usb_handle_message(const struct kvaser_usb *dev,
1251 const struct kvaser_msg *msg)
1254 case CMD_START_CHIP_REPLY:
1255 kvaser_usb_start_chip_reply(dev, msg);
1258 case CMD_STOP_CHIP_REPLY:
1259 kvaser_usb_stop_chip_reply(dev, msg);
1262 case CMD_RX_STD_MESSAGE:
1263 case CMD_RX_EXT_MESSAGE:
1264 kvaser_usb_rx_can_msg(dev, msg);
1267 case CMD_LEAF_LOG_MESSAGE:
1268 if (dev->family != KVASER_LEAF)
1270 kvaser_usb_rx_can_msg(dev, msg);
1273 case CMD_CHIP_STATE_EVENT:
1274 case CMD_CAN_ERROR_EVENT:
1275 if (dev->family == KVASER_LEAF)
1276 kvaser_leaf_rx_error(dev, msg);
1278 kvaser_usbcan_rx_error(dev, msg);
1281 case CMD_TX_ACKNOWLEDGE:
1282 kvaser_usb_tx_acknowledge(dev, msg);
1285 /* Ignored messages */
1286 case CMD_USBCAN_CLOCK_OVERFLOW_EVENT:
1287 if (dev->family != KVASER_USBCAN)
1292 warn: dev_warn(dev->udev->dev.parent,
1293 "Unhandled message (%d)\n", msg->id);
1298 static void kvaser_usb_read_bulk_callback(struct urb *urb)
1300 struct kvaser_usb *dev = urb->context;
1301 struct kvaser_msg *msg;
1305 switch (urb->status) {
1312 dev_info(dev->udev->dev.parent, "Rx URB aborted (%d)\n",
1317 while (pos <= urb->actual_length - MSG_HEADER_LEN) {
1318 msg = urb->transfer_buffer + pos;
1323 if (pos + msg->len > urb->actual_length) {
1324 dev_err(dev->udev->dev.parent, "Format error\n");
1328 kvaser_usb_handle_message(dev, msg);
1334 usb_fill_bulk_urb(urb, dev->udev,
1335 usb_rcvbulkpipe(dev->udev,
1336 dev->bulk_in->bEndpointAddress),
1337 urb->transfer_buffer, RX_BUFFER_SIZE,
1338 kvaser_usb_read_bulk_callback, dev);
1340 err = usb_submit_urb(urb, GFP_ATOMIC);
1341 if (err == -ENODEV) {
1342 for (i = 0; i < dev->nchannels; i++) {
1346 netif_device_detach(dev->nets[i]->netdev);
1349 dev_err(dev->udev->dev.parent,
1350 "Failed resubmitting read bulk urb: %d\n", err);
1356 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
1360 if (dev->rxinitdone)
1363 for (i = 0; i < MAX_RX_URBS; i++) {
1364 struct urb *urb = NULL;
1368 urb = usb_alloc_urb(0, GFP_KERNEL);
1370 dev_warn(dev->udev->dev.parent,
1371 "No memory left for URBs\n");
1376 buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE,
1377 GFP_KERNEL, &buf_dma);
1379 dev_warn(dev->udev->dev.parent,
1380 "No memory left for USB buffer\n");
1386 usb_fill_bulk_urb(urb, dev->udev,
1387 usb_rcvbulkpipe(dev->udev,
1388 dev->bulk_in->bEndpointAddress),
1389 buf, RX_BUFFER_SIZE,
1390 kvaser_usb_read_bulk_callback,
1392 urb->transfer_dma = buf_dma;
1393 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1394 usb_anchor_urb(urb, &dev->rx_submitted);
1396 err = usb_submit_urb(urb, GFP_KERNEL);
1398 usb_unanchor_urb(urb);
1399 usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf,
1405 dev->rxbuf[i] = buf;
1406 dev->rxbuf_dma[i] = buf_dma;
1412 dev_warn(dev->udev->dev.parent,
1413 "Cannot setup read URBs, error %d\n", err);
1415 } else if (i < MAX_RX_URBS) {
1416 dev_warn(dev->udev->dev.parent,
1417 "RX performances may be slow\n");
1420 dev->rxinitdone = true;
1425 static int kvaser_usb_set_opt_mode(const struct kvaser_usb_net_priv *priv)
1427 struct kvaser_msg *msg;
1430 msg = kmalloc(sizeof(*msg), GFP_KERNEL);
1434 msg->id = CMD_SET_CTRL_MODE;
1435 msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_ctrl_mode);
1436 msg->u.ctrl_mode.tid = 0xff;
1437 msg->u.ctrl_mode.channel = priv->channel;
1439 if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
1440 msg->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT;
1442 msg->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL;
1444 rc = kvaser_usb_send_msg(priv->dev, msg);
1450 static int kvaser_usb_start_chip(struct kvaser_usb_net_priv *priv)
1454 init_completion(&priv->start_comp);
1456 err = kvaser_usb_send_simple_msg(priv->dev, CMD_START_CHIP,
1461 if (!wait_for_completion_timeout(&priv->start_comp,
1462 msecs_to_jiffies(START_TIMEOUT)))
1468 static int kvaser_usb_open(struct net_device *netdev)
1470 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1471 struct kvaser_usb *dev = priv->dev;
1474 err = open_candev(netdev);
1478 err = kvaser_usb_setup_rx_urbs(dev);
1482 err = kvaser_usb_set_opt_mode(priv);
1486 err = kvaser_usb_start_chip(priv);
1488 netdev_warn(netdev, "Cannot start device, error %d\n", err);
1492 priv->can.state = CAN_STATE_ERROR_ACTIVE;
1497 close_candev(netdev);
1501 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
1505 usb_kill_anchored_urbs(&dev->rx_submitted);
1507 for (i = 0; i < MAX_RX_URBS; i++)
1508 usb_free_coherent(dev->udev, RX_BUFFER_SIZE,
1512 for (i = 0; i < dev->nchannels; i++) {
1513 struct kvaser_usb_net_priv *priv = dev->nets[i];
1516 kvaser_usb_unlink_tx_urbs(priv);
1520 static int kvaser_usb_stop_chip(struct kvaser_usb_net_priv *priv)
1524 init_completion(&priv->stop_comp);
1526 err = kvaser_usb_send_simple_msg(priv->dev, CMD_STOP_CHIP,
1531 if (!wait_for_completion_timeout(&priv->stop_comp,
1532 msecs_to_jiffies(STOP_TIMEOUT)))
1538 static int kvaser_usb_flush_queue(struct kvaser_usb_net_priv *priv)
1540 struct kvaser_msg *msg;
1543 msg = kmalloc(sizeof(*msg), GFP_KERNEL);
1547 msg->id = CMD_FLUSH_QUEUE;
1548 msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_flush_queue);
1549 msg->u.flush_queue.channel = priv->channel;
1550 msg->u.flush_queue.flags = 0x00;
1552 rc = kvaser_usb_send_msg(priv->dev, msg);
1558 static int kvaser_usb_close(struct net_device *netdev)
1560 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1561 struct kvaser_usb *dev = priv->dev;
1564 netif_stop_queue(netdev);
1566 err = kvaser_usb_flush_queue(priv);
1568 netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
1570 if (kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, priv->channel))
1571 netdev_warn(netdev, "Cannot reset card, error %d\n", err);
1573 err = kvaser_usb_stop_chip(priv);
1575 netdev_warn(netdev, "Cannot stop device, error %d\n", err);
1577 /* reset tx contexts */
1578 kvaser_usb_unlink_tx_urbs(priv);
1580 priv->can.state = CAN_STATE_STOPPED;
1581 close_candev(priv->netdev);
1586 static void kvaser_usb_write_bulk_callback(struct urb *urb)
1588 struct kvaser_usb_tx_urb_context *context = urb->context;
1589 struct kvaser_usb_net_priv *priv;
1590 struct net_device *netdev;
1592 if (WARN_ON(!context))
1595 priv = context->priv;
1596 netdev = priv->netdev;
1598 kfree(urb->transfer_buffer);
1600 if (!netif_device_present(netdev))
1604 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
1607 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
1608 struct net_device *netdev)
1610 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1611 struct kvaser_usb *dev = priv->dev;
1612 struct net_device_stats *stats = &netdev->stats;
1613 struct can_frame *cf = (struct can_frame *)skb->data;
1614 struct kvaser_usb_tx_urb_context *context = NULL;
1617 struct kvaser_msg *msg;
1619 int ret = NETDEV_TX_OK;
1620 u8 *msg_tx_can_flags = NULL; /* GCC */
1622 if (can_dropped_invalid_skb(netdev, skb))
1623 return NETDEV_TX_OK;
1625 urb = usb_alloc_urb(0, GFP_ATOMIC);
1627 netdev_err(netdev, "No memory left for URBs\n");
1628 stats->tx_dropped++;
1630 return NETDEV_TX_OK;
1633 buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC);
1635 stats->tx_dropped++;
1641 msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_tx_can);
1642 msg->u.tx_can.channel = priv->channel;
1644 switch (dev->family) {
1646 msg_tx_can_flags = &msg->u.tx_can.leaf.flags;
1649 msg_tx_can_flags = &msg->u.tx_can.usbcan.flags;
1653 *msg_tx_can_flags = 0;
1655 if (cf->can_id & CAN_EFF_FLAG) {
1656 msg->id = CMD_TX_EXT_MESSAGE;
1657 msg->u.tx_can.msg[0] = (cf->can_id >> 24) & 0x1f;
1658 msg->u.tx_can.msg[1] = (cf->can_id >> 18) & 0x3f;
1659 msg->u.tx_can.msg[2] = (cf->can_id >> 14) & 0x0f;
1660 msg->u.tx_can.msg[3] = (cf->can_id >> 6) & 0xff;
1661 msg->u.tx_can.msg[4] = cf->can_id & 0x3f;
1663 msg->id = CMD_TX_STD_MESSAGE;
1664 msg->u.tx_can.msg[0] = (cf->can_id >> 6) & 0x1f;
1665 msg->u.tx_can.msg[1] = cf->can_id & 0x3f;
1668 msg->u.tx_can.msg[5] = cf->can_dlc;
1669 memcpy(&msg->u.tx_can.msg[6], cf->data, cf->can_dlc);
1671 if (cf->can_id & CAN_RTR_FLAG)
1672 *msg_tx_can_flags |= MSG_FLAG_REMOTE_FRAME;
1674 for (i = 0; i < ARRAY_SIZE(priv->tx_contexts); i++) {
1675 if (priv->tx_contexts[i].echo_index == MAX_TX_URBS) {
1676 context = &priv->tx_contexts[i];
1681 /* This should never happen; it implies a flow control bug */
1683 netdev_warn(netdev, "cannot find free context\n");
1684 ret = NETDEV_TX_BUSY;
1688 context->priv = priv;
1689 context->echo_index = i;
1690 context->dlc = cf->can_dlc;
1692 msg->u.tx_can.tid = context->echo_index;
1694 usb_fill_bulk_urb(urb, dev->udev,
1695 usb_sndbulkpipe(dev->udev,
1696 dev->bulk_out->bEndpointAddress),
1698 kvaser_usb_write_bulk_callback, context);
1699 usb_anchor_urb(urb, &priv->tx_submitted);
1701 can_put_echo_skb(skb, netdev, context->echo_index);
1703 atomic_inc(&priv->active_tx_urbs);
1705 if (atomic_read(&priv->active_tx_urbs) >= MAX_TX_URBS)
1706 netif_stop_queue(netdev);
1708 err = usb_submit_urb(urb, GFP_ATOMIC);
1709 if (unlikely(err)) {
1710 can_free_echo_skb(netdev, context->echo_index);
1712 atomic_dec(&priv->active_tx_urbs);
1713 usb_unanchor_urb(urb);
1715 stats->tx_dropped++;
1718 netif_device_detach(netdev);
1720 netdev_warn(netdev, "Failed tx_urb %d\n", err);
1727 return NETDEV_TX_OK;
1736 static const struct net_device_ops kvaser_usb_netdev_ops = {
1737 .ndo_open = kvaser_usb_open,
1738 .ndo_stop = kvaser_usb_close,
1739 .ndo_start_xmit = kvaser_usb_start_xmit,
1740 .ndo_change_mtu = can_change_mtu,
1743 static const struct can_bittiming_const kvaser_usb_bittiming_const = {
1744 .name = "kvaser_usb",
1745 .tseg1_min = KVASER_USB_TSEG1_MIN,
1746 .tseg1_max = KVASER_USB_TSEG1_MAX,
1747 .tseg2_min = KVASER_USB_TSEG2_MIN,
1748 .tseg2_max = KVASER_USB_TSEG2_MAX,
1749 .sjw_max = KVASER_USB_SJW_MAX,
1750 .brp_min = KVASER_USB_BRP_MIN,
1751 .brp_max = KVASER_USB_BRP_MAX,
1752 .brp_inc = KVASER_USB_BRP_INC,
1755 static int kvaser_usb_set_bittiming(struct net_device *netdev)
1757 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1758 struct can_bittiming *bt = &priv->can.bittiming;
1759 struct kvaser_usb *dev = priv->dev;
1760 struct kvaser_msg *msg;
1763 msg = kmalloc(sizeof(*msg), GFP_KERNEL);
1767 msg->id = CMD_SET_BUS_PARAMS;
1768 msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_busparams);
1769 msg->u.busparams.channel = priv->channel;
1770 msg->u.busparams.tid = 0xff;
1771 msg->u.busparams.bitrate = cpu_to_le32(bt->bitrate);
1772 msg->u.busparams.sjw = bt->sjw;
1773 msg->u.busparams.tseg1 = bt->prop_seg + bt->phase_seg1;
1774 msg->u.busparams.tseg2 = bt->phase_seg2;
1776 if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
1777 msg->u.busparams.no_samp = 3;
1779 msg->u.busparams.no_samp = 1;
1781 rc = kvaser_usb_send_msg(dev, msg);
1787 static int kvaser_usb_set_mode(struct net_device *netdev,
1790 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1794 case CAN_MODE_START:
1795 err = kvaser_usb_simple_msg_async(priv, CMD_START_CHIP);
1806 static int kvaser_usb_get_berr_counter(const struct net_device *netdev,
1807 struct can_berr_counter *bec)
1809 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1816 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
1820 for (i = 0; i < dev->nchannels; i++) {
1824 unregister_netdev(dev->nets[i]->netdev);
1827 kvaser_usb_unlink_all_urbs(dev);
1829 for (i = 0; i < dev->nchannels; i++) {
1833 free_candev(dev->nets[i]->netdev);
1837 static int kvaser_usb_init_one(struct usb_interface *intf,
1838 const struct usb_device_id *id, int channel)
1840 struct kvaser_usb *dev = usb_get_intfdata(intf);
1841 struct net_device *netdev;
1842 struct kvaser_usb_net_priv *priv;
1845 err = kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, channel);
1849 netdev = alloc_candev(sizeof(*priv), MAX_TX_URBS);
1851 dev_err(&intf->dev, "Cannot alloc candev\n");
1855 priv = netdev_priv(netdev);
1857 init_completion(&priv->start_comp);
1858 init_completion(&priv->stop_comp);
1860 init_usb_anchor(&priv->tx_submitted);
1861 atomic_set(&priv->active_tx_urbs, 0);
1863 for (i = 0; i < ARRAY_SIZE(priv->tx_contexts); i++)
1864 priv->tx_contexts[i].echo_index = MAX_TX_URBS;
1867 priv->netdev = netdev;
1868 priv->channel = channel;
1870 priv->can.state = CAN_STATE_STOPPED;
1871 priv->can.clock.freq = CAN_USB_CLOCK;
1872 priv->can.bittiming_const = &kvaser_usb_bittiming_const;
1873 priv->can.do_set_bittiming = kvaser_usb_set_bittiming;
1874 priv->can.do_set_mode = kvaser_usb_set_mode;
1875 if (id->driver_info & KVASER_HAS_TXRX_ERRORS)
1876 priv->can.do_get_berr_counter = kvaser_usb_get_berr_counter;
1877 priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
1878 if (id->driver_info & KVASER_HAS_SILENT_MODE)
1879 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
1881 netdev->flags |= IFF_ECHO;
1883 netdev->netdev_ops = &kvaser_usb_netdev_ops;
1885 SET_NETDEV_DEV(netdev, &intf->dev);
1886 netdev->dev_id = channel;
1888 dev->nets[channel] = priv;
1890 err = register_candev(netdev);
1892 dev_err(&intf->dev, "Failed to register can device\n");
1893 free_candev(netdev);
1894 dev->nets[channel] = NULL;
1898 netdev_dbg(netdev, "device registered\n");
1903 static int kvaser_usb_get_endpoints(const struct usb_interface *intf,
1904 struct usb_endpoint_descriptor **in,
1905 struct usb_endpoint_descriptor **out)
1907 const struct usb_host_interface *iface_desc;
1908 struct usb_endpoint_descriptor *endpoint;
1911 iface_desc = &intf->altsetting[0];
1913 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1914 endpoint = &iface_desc->endpoint[i].desc;
1916 if (!*in && usb_endpoint_is_bulk_in(endpoint))
1919 if (!*out && usb_endpoint_is_bulk_out(endpoint))
1922 /* use first bulk endpoint for in and out */
1930 static int kvaser_usb_probe(struct usb_interface *intf,
1931 const struct usb_device_id *id)
1933 struct kvaser_usb *dev;
1937 dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
1941 if (kvaser_is_leaf(id)) {
1942 dev->family = KVASER_LEAF;
1943 } else if (kvaser_is_usbcan(id)) {
1944 dev->family = KVASER_USBCAN;
1947 "Product ID (%d) does not belong to any known Kvaser USB family",
1952 err = kvaser_usb_get_endpoints(intf, &dev->bulk_in, &dev->bulk_out);
1954 dev_err(&intf->dev, "Cannot get usb endpoint(s)");
1958 dev->udev = interface_to_usbdev(intf);
1960 init_usb_anchor(&dev->rx_submitted);
1962 usb_set_intfdata(intf, dev);
1964 /* On some x86 laptops, plugging a Kvaser device again after
1965 * an unplug makes the firmware always ignore the very first
1966 * command. For such a case, provide some room for retries
1967 * instead of completely exiting the driver.
1970 err = kvaser_usb_get_software_info(dev);
1971 } while (--retry && err == -ETIMEDOUT);
1975 "Cannot get software infos, error %d\n", err);
1979 err = kvaser_usb_get_card_info(dev);
1982 "Cannot get card infos, error %d\n", err);
1986 dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n",
1987 ((dev->fw_version >> 24) & 0xff),
1988 ((dev->fw_version >> 16) & 0xff),
1989 (dev->fw_version & 0xffff));
1991 for (i = 0; i < dev->nchannels; i++) {
1992 err = kvaser_usb_init_one(intf, id, i);
1994 kvaser_usb_remove_interfaces(dev);
2002 static void kvaser_usb_disconnect(struct usb_interface *intf)
2004 struct kvaser_usb *dev = usb_get_intfdata(intf);
2006 usb_set_intfdata(intf, NULL);
2011 kvaser_usb_remove_interfaces(dev);
2014 static struct usb_driver kvaser_usb_driver = {
2015 .name = "kvaser_usb",
2016 .probe = kvaser_usb_probe,
2017 .disconnect = kvaser_usb_disconnect,
2018 .id_table = kvaser_usb_table,
2021 module_usb_driver(kvaser_usb_driver);
2023 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
2024 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
2025 MODULE_LICENSE("GPL v2");