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/spinlock.h>
18 #include <linux/kernel.h>
19 #include <linux/completion.h>
20 #include <linux/module.h>
21 #include <linux/netdevice.h>
22 #include <linux/usb.h>
24 #include <linux/can.h>
25 #include <linux/can/dev.h>
26 #include <linux/can/error.h>
29 #define START_TIMEOUT 1000 /* msecs */
30 #define STOP_TIMEOUT 1000 /* msecs */
31 #define USB_SEND_TIMEOUT 1000 /* msecs */
32 #define USB_RECV_TIMEOUT 1000 /* msecs */
33 #define RX_BUFFER_SIZE 3072
34 #define CAN_USB_CLOCK 8000000
35 #define MAX_NET_DEVICES 3
36 #define MAX_USBCAN_NET_DEVICES 2
38 /* Kvaser Leaf USB devices */
39 #define KVASER_VENDOR_ID 0x0bfd
40 #define USB_LEAF_DEVEL_PRODUCT_ID 10
41 #define USB_LEAF_LITE_PRODUCT_ID 11
42 #define USB_LEAF_PRO_PRODUCT_ID 12
43 #define USB_LEAF_SPRO_PRODUCT_ID 14
44 #define USB_LEAF_PRO_LS_PRODUCT_ID 15
45 #define USB_LEAF_PRO_SWC_PRODUCT_ID 16
46 #define USB_LEAF_PRO_LIN_PRODUCT_ID 17
47 #define USB_LEAF_SPRO_LS_PRODUCT_ID 18
48 #define USB_LEAF_SPRO_SWC_PRODUCT_ID 19
49 #define USB_MEMO2_DEVEL_PRODUCT_ID 22
50 #define USB_MEMO2_HSHS_PRODUCT_ID 23
51 #define USB_UPRO_HSHS_PRODUCT_ID 24
52 #define USB_LEAF_LITE_GI_PRODUCT_ID 25
53 #define USB_LEAF_PRO_OBDII_PRODUCT_ID 26
54 #define USB_MEMO2_HSLS_PRODUCT_ID 27
55 #define USB_LEAF_LITE_CH_PRODUCT_ID 28
56 #define USB_BLACKBIRD_SPRO_PRODUCT_ID 29
57 #define USB_OEM_MERCURY_PRODUCT_ID 34
58 #define USB_OEM_LEAF_PRODUCT_ID 35
59 #define USB_CAN_R_PRODUCT_ID 39
60 #define USB_LEAF_LITE_V2_PRODUCT_ID 288
61 #define USB_MINI_PCIE_HS_PRODUCT_ID 289
62 #define USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID 290
63 #define USB_USBCAN_LIGHT_2HS_PRODUCT_ID 291
64 #define USB_MINI_PCIE_2HS_PRODUCT_ID 292
66 static inline bool kvaser_is_leaf(const struct usb_device_id
*id
)
68 return id
->idProduct
>= USB_LEAF_DEVEL_PRODUCT_ID
&&
69 id
->idProduct
<= USB_MINI_PCIE_2HS_PRODUCT_ID
;
72 /* Kvaser USBCan-II devices */
73 #define USB_USBCAN_REVB_PRODUCT_ID 2
74 #define USB_VCI2_PRODUCT_ID 3
75 #define USB_USBCAN2_PRODUCT_ID 4
76 #define USB_MEMORATOR_PRODUCT_ID 5
78 static inline bool kvaser_is_usbcan(const struct usb_device_id
*id
)
80 return id
->idProduct
>= USB_USBCAN_REVB_PRODUCT_ID
&&
81 id
->idProduct
<= USB_MEMORATOR_PRODUCT_ID
;
84 /* USB devices features */
85 #define KVASER_HAS_SILENT_MODE BIT(0)
86 #define KVASER_HAS_TXRX_ERRORS BIT(1)
88 /* Message header size */
89 #define MSG_HEADER_LEN 2
91 /* Can message flags */
92 #define MSG_FLAG_ERROR_FRAME BIT(0)
93 #define MSG_FLAG_OVERRUN BIT(1)
94 #define MSG_FLAG_NERR BIT(2)
95 #define MSG_FLAG_WAKEUP BIT(3)
96 #define MSG_FLAG_REMOTE_FRAME BIT(4)
97 #define MSG_FLAG_RESERVED BIT(5)
98 #define MSG_FLAG_TX_ACK BIT(6)
99 #define MSG_FLAG_TX_REQUEST BIT(7)
101 /* Can states (M16C CxSTRH register) */
102 #define M16C_STATE_BUS_RESET BIT(0)
103 #define M16C_STATE_BUS_ERROR BIT(4)
104 #define M16C_STATE_BUS_PASSIVE BIT(5)
105 #define M16C_STATE_BUS_OFF BIT(6)
108 #define CMD_RX_STD_MESSAGE 12
109 #define CMD_TX_STD_MESSAGE 13
110 #define CMD_RX_EXT_MESSAGE 14
111 #define CMD_TX_EXT_MESSAGE 15
112 #define CMD_SET_BUS_PARAMS 16
113 #define CMD_GET_BUS_PARAMS 17
114 #define CMD_GET_BUS_PARAMS_REPLY 18
115 #define CMD_GET_CHIP_STATE 19
116 #define CMD_CHIP_STATE_EVENT 20
117 #define CMD_SET_CTRL_MODE 21
118 #define CMD_GET_CTRL_MODE 22
119 #define CMD_GET_CTRL_MODE_REPLY 23
120 #define CMD_RESET_CHIP 24
121 #define CMD_RESET_CARD 25
122 #define CMD_START_CHIP 26
123 #define CMD_START_CHIP_REPLY 27
124 #define CMD_STOP_CHIP 28
125 #define CMD_STOP_CHIP_REPLY 29
127 #define CMD_LEAF_GET_CARD_INFO2 32
128 #define CMD_USBCAN_RESET_CLOCK 32
129 #define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 33
131 #define CMD_GET_CARD_INFO 34
132 #define CMD_GET_CARD_INFO_REPLY 35
133 #define CMD_GET_SOFTWARE_INFO 38
134 #define CMD_GET_SOFTWARE_INFO_REPLY 39
135 #define CMD_ERROR_EVENT 45
136 #define CMD_FLUSH_QUEUE 48
137 #define CMD_RESET_ERROR_COUNTER 49
138 #define CMD_TX_ACKNOWLEDGE 50
139 #define CMD_CAN_ERROR_EVENT 51
140 #define CMD_FLUSH_QUEUE_REPLY 68
142 #define CMD_LEAF_USB_THROTTLE 77
143 #define CMD_LEAF_LOG_MESSAGE 106
146 #define M16C_EF_ACKE BIT(0)
147 #define M16C_EF_CRCE BIT(1)
148 #define M16C_EF_FORME BIT(2)
149 #define M16C_EF_STFE BIT(3)
150 #define M16C_EF_BITE0 BIT(4)
151 #define M16C_EF_BITE1 BIT(5)
152 #define M16C_EF_RCVE BIT(6)
153 #define M16C_EF_TRE BIT(7)
155 /* Only Leaf-based devices can report M16C error factors,
156 * thus define our own error status flags for USBCANII
158 #define USBCAN_ERROR_STATE_NONE 0
159 #define USBCAN_ERROR_STATE_TX_ERROR BIT(0)
160 #define USBCAN_ERROR_STATE_RX_ERROR BIT(1)
161 #define USBCAN_ERROR_STATE_BUSERROR BIT(2)
163 /* bittiming parameters */
164 #define KVASER_USB_TSEG1_MIN 1
165 #define KVASER_USB_TSEG1_MAX 16
166 #define KVASER_USB_TSEG2_MIN 1
167 #define KVASER_USB_TSEG2_MAX 8
168 #define KVASER_USB_SJW_MAX 4
169 #define KVASER_USB_BRP_MIN 1
170 #define KVASER_USB_BRP_MAX 64
171 #define KVASER_USB_BRP_INC 1
174 #define KVASER_CTRL_MODE_NORMAL 1
175 #define KVASER_CTRL_MODE_SILENT 2
176 #define KVASER_CTRL_MODE_SELFRECEPTION 3
177 #define KVASER_CTRL_MODE_OFF 4
179 /* Extended CAN identifier flag */
180 #define KVASER_EXTENDED_FRAME BIT(31)
182 /* Kvaser USB CAN dongles are divided into two major families:
183 * - Leaf: Based on Renesas M32C, running firmware labeled as 'filo'
184 * - UsbcanII: Based on Renesas M16C, running firmware labeled as 'helios'
186 enum kvaser_usb_family
{
191 struct kvaser_msg_simple
{
196 struct kvaser_msg_cardinfo
{
201 __le32 serial_number
;
205 __le32 serial_number_low
;
206 __le32 serial_number_high
;
209 __le32 clock_resolution
;
224 struct kvaser_msg_cardinfo2
{
228 __le32 oem_unlock_code
;
231 struct leaf_msg_softinfo
{
236 __le16 max_outstanding_tx
;
240 struct usbcan_msg_softinfo
{
243 __le16 max_outstanding_tx
;
250 struct kvaser_msg_busparams
{
260 struct kvaser_msg_tx_can
{
276 struct kvaser_msg_rx_can_header
{
281 struct leaf_msg_rx_can
{
289 struct usbcan_msg_rx_can
{
297 struct leaf_msg_chip_state_event
{
309 struct usbcan_msg_chip_state_event
{
321 struct kvaser_msg_tx_acknowledge_header
{
326 struct leaf_msg_tx_acknowledge
{
335 struct usbcan_msg_tx_acknowledge
{
343 struct leaf_msg_error_event
{
355 struct usbcan_msg_error_event
{
358 u8 tx_errors_count_ch0
;
359 u8 rx_errors_count_ch0
;
360 u8 tx_errors_count_ch1
;
361 u8 rx_errors_count_ch1
;
367 struct kvaser_msg_ctrl_mode
{
374 struct kvaser_msg_flush_queue
{
381 struct leaf_msg_log_message
{
395 struct kvaser_msg_simple simple
;
396 struct kvaser_msg_cardinfo cardinfo
;
397 struct kvaser_msg_cardinfo2 cardinfo2
;
398 struct kvaser_msg_busparams busparams
;
400 struct kvaser_msg_rx_can_header rx_can_header
;
401 struct kvaser_msg_tx_acknowledge_header tx_acknowledge_header
;
404 struct leaf_msg_softinfo softinfo
;
405 struct leaf_msg_rx_can rx_can
;
406 struct leaf_msg_chip_state_event chip_state_event
;
407 struct leaf_msg_tx_acknowledge tx_acknowledge
;
408 struct leaf_msg_error_event error_event
;
409 struct leaf_msg_log_message log_message
;
413 struct usbcan_msg_softinfo softinfo
;
414 struct usbcan_msg_rx_can rx_can
;
415 struct usbcan_msg_chip_state_event chip_state_event
;
416 struct usbcan_msg_tx_acknowledge tx_acknowledge
;
417 struct usbcan_msg_error_event error_event
;
420 struct kvaser_msg_tx_can tx_can
;
421 struct kvaser_msg_ctrl_mode ctrl_mode
;
422 struct kvaser_msg_flush_queue flush_queue
;
426 /* Summary of a kvaser error event, for a unified Leaf/Usbcan error
427 * handling. Some discrepancies between the two families exist:
429 * - USBCAN firmware does not report M16C "error factors"
430 * - USBCAN controllers has difficulties reporting if the raised error
431 * event is for ch0 or ch1. They leave such arbitration to the OS
432 * driver by letting it compare error counters with previous values
433 * and decide the error event's channel. Thus for USBCAN, the channel
434 * field is only advisory.
436 struct kvaser_usb_error_summary
{
437 u8 channel
, status
, txerr
, rxerr
;
449 /* Context for an outstanding, not yet ACKed, transmission */
450 struct kvaser_usb_tx_urb_context
{
451 struct kvaser_usb_net_priv
*priv
;
457 struct usb_device
*udev
;
458 struct kvaser_usb_net_priv
*nets
[MAX_NET_DEVICES
];
460 struct usb_endpoint_descriptor
*bulk_in
, *bulk_out
;
461 struct usb_anchor rx_submitted
;
463 /* @max_tx_urbs: Firmware-reported maximum number of outstanding,
464 * not yet ACKed, transmissions on this device. This value is
465 * also used as a sentinel for marking free tx contexts.
468 unsigned int nchannels
;
469 unsigned int max_tx_urbs
;
470 enum kvaser_usb_family family
;
473 void *rxbuf
[MAX_RX_URBS
];
474 dma_addr_t rxbuf_dma
[MAX_RX_URBS
];
477 struct kvaser_usb_net_priv
{
479 struct can_berr_counter bec
;
481 struct kvaser_usb
*dev
;
482 struct net_device
*netdev
;
485 struct completion start_comp
, stop_comp
;
486 struct usb_anchor tx_submitted
;
488 spinlock_t tx_contexts_lock
;
489 int active_tx_contexts
;
490 struct kvaser_usb_tx_urb_context tx_contexts
[];
493 static const struct usb_device_id kvaser_usb_table
[] = {
494 /* Leaf family IDs */
495 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_DEVEL_PRODUCT_ID
) },
496 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_LITE_PRODUCT_ID
) },
497 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_PRO_PRODUCT_ID
),
498 .driver_info
= KVASER_HAS_TXRX_ERRORS
|
499 KVASER_HAS_SILENT_MODE
},
500 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_SPRO_PRODUCT_ID
),
501 .driver_info
= KVASER_HAS_TXRX_ERRORS
|
502 KVASER_HAS_SILENT_MODE
},
503 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_PRO_LS_PRODUCT_ID
),
504 .driver_info
= KVASER_HAS_TXRX_ERRORS
|
505 KVASER_HAS_SILENT_MODE
},
506 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_PRO_SWC_PRODUCT_ID
),
507 .driver_info
= KVASER_HAS_TXRX_ERRORS
|
508 KVASER_HAS_SILENT_MODE
},
509 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_PRO_LIN_PRODUCT_ID
),
510 .driver_info
= KVASER_HAS_TXRX_ERRORS
|
511 KVASER_HAS_SILENT_MODE
},
512 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_SPRO_LS_PRODUCT_ID
),
513 .driver_info
= KVASER_HAS_TXRX_ERRORS
|
514 KVASER_HAS_SILENT_MODE
},
515 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_SPRO_SWC_PRODUCT_ID
),
516 .driver_info
= KVASER_HAS_TXRX_ERRORS
|
517 KVASER_HAS_SILENT_MODE
},
518 { USB_DEVICE(KVASER_VENDOR_ID
, USB_MEMO2_DEVEL_PRODUCT_ID
),
519 .driver_info
= KVASER_HAS_TXRX_ERRORS
|
520 KVASER_HAS_SILENT_MODE
},
521 { USB_DEVICE(KVASER_VENDOR_ID
, USB_MEMO2_HSHS_PRODUCT_ID
),
522 .driver_info
= KVASER_HAS_TXRX_ERRORS
|
523 KVASER_HAS_SILENT_MODE
},
524 { USB_DEVICE(KVASER_VENDOR_ID
, USB_UPRO_HSHS_PRODUCT_ID
),
525 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
526 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_LITE_GI_PRODUCT_ID
) },
527 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_PRO_OBDII_PRODUCT_ID
),
528 .driver_info
= KVASER_HAS_TXRX_ERRORS
|
529 KVASER_HAS_SILENT_MODE
},
530 { USB_DEVICE(KVASER_VENDOR_ID
, USB_MEMO2_HSLS_PRODUCT_ID
),
531 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
532 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_LITE_CH_PRODUCT_ID
),
533 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
534 { USB_DEVICE(KVASER_VENDOR_ID
, USB_BLACKBIRD_SPRO_PRODUCT_ID
),
535 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
536 { USB_DEVICE(KVASER_VENDOR_ID
, USB_OEM_MERCURY_PRODUCT_ID
),
537 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
538 { USB_DEVICE(KVASER_VENDOR_ID
, USB_OEM_LEAF_PRODUCT_ID
),
539 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
540 { USB_DEVICE(KVASER_VENDOR_ID
, USB_CAN_R_PRODUCT_ID
),
541 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
542 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_LITE_V2_PRODUCT_ID
) },
543 { USB_DEVICE(KVASER_VENDOR_ID
, USB_MINI_PCIE_HS_PRODUCT_ID
) },
544 { USB_DEVICE(KVASER_VENDOR_ID
, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID
) },
545 { USB_DEVICE(KVASER_VENDOR_ID
, USB_USBCAN_LIGHT_2HS_PRODUCT_ID
) },
546 { USB_DEVICE(KVASER_VENDOR_ID
, USB_MINI_PCIE_2HS_PRODUCT_ID
) },
548 /* USBCANII family IDs */
549 { USB_DEVICE(KVASER_VENDOR_ID
, USB_USBCAN2_PRODUCT_ID
),
550 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
551 { USB_DEVICE(KVASER_VENDOR_ID
, USB_USBCAN_REVB_PRODUCT_ID
),
552 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
553 { USB_DEVICE(KVASER_VENDOR_ID
, USB_MEMORATOR_PRODUCT_ID
),
554 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
555 { USB_DEVICE(KVASER_VENDOR_ID
, USB_VCI2_PRODUCT_ID
),
556 .driver_info
= KVASER_HAS_TXRX_ERRORS
},
560 MODULE_DEVICE_TABLE(usb
, kvaser_usb_table
);
562 static inline int kvaser_usb_send_msg(const struct kvaser_usb
*dev
,
563 struct kvaser_msg
*msg
)
567 return usb_bulk_msg(dev
->udev
,
568 usb_sndbulkpipe(dev
->udev
,
569 dev
->bulk_out
->bEndpointAddress
),
570 msg
, msg
->len
, &actual_len
,
574 static int kvaser_usb_wait_msg(const struct kvaser_usb
*dev
, u8 id
,
575 struct kvaser_msg
*msg
)
577 struct kvaser_msg
*tmp
;
582 unsigned long to
= jiffies
+ msecs_to_jiffies(USB_RECV_TIMEOUT
);
584 buf
= kzalloc(RX_BUFFER_SIZE
, GFP_KERNEL
);
589 err
= usb_bulk_msg(dev
->udev
,
590 usb_rcvbulkpipe(dev
->udev
,
591 dev
->bulk_in
->bEndpointAddress
),
592 buf
, RX_BUFFER_SIZE
, &actual_len
,
598 while (pos
<= actual_len
- MSG_HEADER_LEN
) {
601 /* Handle messages crossing the USB endpoint max packet
602 * size boundary. Check kvaser_usb_read_bulk_callback()
603 * for further details.
606 pos
= round_up(pos
, le16_to_cpu(dev
->bulk_in
->
611 if (pos
+ tmp
->len
> actual_len
) {
612 dev_err(dev
->udev
->dev
.parent
,
618 memcpy(msg
, tmp
, tmp
->len
);
624 } while (time_before(jiffies
, to
));
634 static int kvaser_usb_send_simple_msg(const struct kvaser_usb
*dev
,
635 u8 msg_id
, int channel
)
637 struct kvaser_msg
*msg
;
640 msg
= kmalloc(sizeof(*msg
), GFP_KERNEL
);
645 msg
->len
= MSG_HEADER_LEN
+ sizeof(struct kvaser_msg_simple
);
646 msg
->u
.simple
.channel
= channel
;
647 msg
->u
.simple
.tid
= 0xff;
649 rc
= kvaser_usb_send_msg(dev
, msg
);
655 static int kvaser_usb_get_software_info(struct kvaser_usb
*dev
)
657 struct kvaser_msg msg
;
660 err
= kvaser_usb_send_simple_msg(dev
, CMD_GET_SOFTWARE_INFO
, 0);
664 err
= kvaser_usb_wait_msg(dev
, CMD_GET_SOFTWARE_INFO_REPLY
, &msg
);
668 switch (dev
->family
) {
670 dev
->fw_version
= le32_to_cpu(msg
.u
.leaf
.softinfo
.fw_version
);
672 le16_to_cpu(msg
.u
.leaf
.softinfo
.max_outstanding_tx
);
675 dev
->fw_version
= le32_to_cpu(msg
.u
.usbcan
.softinfo
.fw_version
);
677 le16_to_cpu(msg
.u
.usbcan
.softinfo
.max_outstanding_tx
);
684 static int kvaser_usb_get_card_info(struct kvaser_usb
*dev
)
686 struct kvaser_msg msg
;
689 err
= kvaser_usb_send_simple_msg(dev
, CMD_GET_CARD_INFO
, 0);
693 err
= kvaser_usb_wait_msg(dev
, CMD_GET_CARD_INFO_REPLY
, &msg
);
697 dev
->nchannels
= msg
.u
.cardinfo
.nchannels
;
698 if ((dev
->nchannels
> MAX_NET_DEVICES
) ||
699 (dev
->family
== KVASER_USBCAN
&&
700 dev
->nchannels
> MAX_USBCAN_NET_DEVICES
))
706 static void kvaser_usb_tx_acknowledge(const struct kvaser_usb
*dev
,
707 const struct kvaser_msg
*msg
)
709 struct net_device_stats
*stats
;
710 struct kvaser_usb_tx_urb_context
*context
;
711 struct kvaser_usb_net_priv
*priv
;
713 struct can_frame
*cf
;
717 channel
= msg
->u
.tx_acknowledge_header
.channel
;
718 tid
= msg
->u
.tx_acknowledge_header
.tid
;
720 if (channel
>= dev
->nchannels
) {
721 dev_err(dev
->udev
->dev
.parent
,
722 "Invalid channel number (%d)\n", channel
);
726 priv
= dev
->nets
[channel
];
728 if (!netif_device_present(priv
->netdev
))
731 stats
= &priv
->netdev
->stats
;
733 context
= &priv
->tx_contexts
[tid
% dev
->max_tx_urbs
];
735 /* Sometimes the state change doesn't come after a bus-off event */
736 if (priv
->can
.restart_ms
&&
737 (priv
->can
.state
>= CAN_STATE_BUS_OFF
)) {
738 skb
= alloc_can_err_skb(priv
->netdev
, &cf
);
740 cf
->can_id
|= CAN_ERR_RESTARTED
;
743 stats
->rx_bytes
+= cf
->can_dlc
;
746 netdev_err(priv
->netdev
,
747 "No memory left for err_skb\n");
750 priv
->can
.can_stats
.restarts
++;
751 netif_carrier_on(priv
->netdev
);
753 priv
->can
.state
= CAN_STATE_ERROR_ACTIVE
;
757 stats
->tx_bytes
+= context
->dlc
;
759 spin_lock_irqsave(&priv
->tx_contexts_lock
, flags
);
761 can_get_echo_skb(priv
->netdev
, context
->echo_index
);
762 context
->echo_index
= dev
->max_tx_urbs
;
763 --priv
->active_tx_contexts
;
764 netif_wake_queue(priv
->netdev
);
766 spin_unlock_irqrestore(&priv
->tx_contexts_lock
, flags
);
769 static void kvaser_usb_simple_msg_callback(struct urb
*urb
)
771 struct net_device
*netdev
= urb
->context
;
773 kfree(urb
->transfer_buffer
);
776 netdev_warn(netdev
, "urb status received: %d\n",
780 static int kvaser_usb_simple_msg_async(struct kvaser_usb_net_priv
*priv
,
783 struct kvaser_usb
*dev
= priv
->dev
;
784 struct net_device
*netdev
= priv
->netdev
;
785 struct kvaser_msg
*msg
;
790 urb
= usb_alloc_urb(0, GFP_ATOMIC
);
794 buf
= kmalloc(sizeof(struct kvaser_msg
), GFP_ATOMIC
);
800 msg
= (struct kvaser_msg
*)buf
;
801 msg
->len
= MSG_HEADER_LEN
+ sizeof(struct kvaser_msg_simple
);
803 msg
->u
.simple
.channel
= priv
->channel
;
805 usb_fill_bulk_urb(urb
, dev
->udev
,
806 usb_sndbulkpipe(dev
->udev
,
807 dev
->bulk_out
->bEndpointAddress
),
809 kvaser_usb_simple_msg_callback
, netdev
);
810 usb_anchor_urb(urb
, &priv
->tx_submitted
);
812 err
= usb_submit_urb(urb
, GFP_ATOMIC
);
814 netdev_err(netdev
, "Error transmitting URB\n");
815 usb_unanchor_urb(urb
);
825 static void kvaser_usb_rx_error_update_can_state(struct kvaser_usb_net_priv
*priv
,
826 const struct kvaser_usb_error_summary
*es
,
827 struct can_frame
*cf
)
829 struct kvaser_usb
*dev
= priv
->dev
;
830 struct net_device_stats
*stats
= &priv
->netdev
->stats
;
831 enum can_state cur_state
, new_state
, tx_state
, rx_state
;
833 netdev_dbg(priv
->netdev
, "Error status: 0x%02x\n", es
->status
);
835 new_state
= cur_state
= priv
->can
.state
;
837 if (es
->status
& (M16C_STATE_BUS_OFF
| M16C_STATE_BUS_RESET
))
838 new_state
= CAN_STATE_BUS_OFF
;
839 else if (es
->status
& M16C_STATE_BUS_PASSIVE
)
840 new_state
= CAN_STATE_ERROR_PASSIVE
;
841 else if (es
->status
& M16C_STATE_BUS_ERROR
) {
842 /* Guard against spurious error events after a busoff */
843 if (cur_state
< CAN_STATE_BUS_OFF
) {
844 if ((es
->txerr
>= 128) || (es
->rxerr
>= 128))
845 new_state
= CAN_STATE_ERROR_PASSIVE
;
846 else if ((es
->txerr
>= 96) || (es
->rxerr
>= 96))
847 new_state
= CAN_STATE_ERROR_WARNING
;
848 else if (cur_state
> CAN_STATE_ERROR_ACTIVE
)
849 new_state
= CAN_STATE_ERROR_ACTIVE
;
854 new_state
= CAN_STATE_ERROR_ACTIVE
;
856 if (new_state
!= cur_state
) {
857 tx_state
= (es
->txerr
>= es
->rxerr
) ? new_state
: 0;
858 rx_state
= (es
->txerr
<= es
->rxerr
) ? new_state
: 0;
860 can_change_state(priv
->netdev
, cf
, tx_state
, rx_state
);
863 if (priv
->can
.restart_ms
&&
864 (cur_state
>= CAN_STATE_BUS_OFF
) &&
865 (new_state
< CAN_STATE_BUS_OFF
)) {
866 priv
->can
.can_stats
.restarts
++;
869 switch (dev
->family
) {
871 if (es
->leaf
.error_factor
) {
872 priv
->can
.can_stats
.bus_error
++;
877 if (es
->usbcan
.error_state
& USBCAN_ERROR_STATE_TX_ERROR
)
879 if (es
->usbcan
.error_state
& USBCAN_ERROR_STATE_RX_ERROR
)
881 if (es
->usbcan
.error_state
& USBCAN_ERROR_STATE_BUSERROR
) {
882 priv
->can
.can_stats
.bus_error
++;
887 priv
->bec
.txerr
= es
->txerr
;
888 priv
->bec
.rxerr
= es
->rxerr
;
891 static void kvaser_usb_rx_error(const struct kvaser_usb
*dev
,
892 const struct kvaser_usb_error_summary
*es
)
894 struct can_frame
*cf
, tmp_cf
= { .can_id
= CAN_ERR_FLAG
, .can_dlc
= CAN_ERR_DLC
};
896 struct net_device_stats
*stats
;
897 struct kvaser_usb_net_priv
*priv
;
898 enum can_state old_state
, new_state
;
900 if (es
->channel
>= dev
->nchannels
) {
901 dev_err(dev
->udev
->dev
.parent
,
902 "Invalid channel number (%d)\n", es
->channel
);
906 priv
= dev
->nets
[es
->channel
];
907 stats
= &priv
->netdev
->stats
;
909 /* Update all of the can interface's state and error counters before
910 * trying any memory allocation that can actually fail with -ENOMEM.
912 * We send a temporary stack-allocated error can frame to
913 * can_change_state() for the very same reason.
915 * TODO: Split can_change_state() responsibility between updating the
916 * can interface's state and counters, and the setting up of can error
917 * frame ID and data to userspace. Remove stack allocation afterwards.
919 old_state
= priv
->can
.state
;
920 kvaser_usb_rx_error_update_can_state(priv
, es
, &tmp_cf
);
921 new_state
= priv
->can
.state
;
923 skb
= alloc_can_err_skb(priv
->netdev
, &cf
);
928 memcpy(cf
, &tmp_cf
, sizeof(*cf
));
930 if (new_state
!= old_state
) {
932 (M16C_STATE_BUS_OFF
| M16C_STATE_BUS_RESET
)) {
933 if (!priv
->can
.restart_ms
)
934 kvaser_usb_simple_msg_async(priv
, CMD_STOP_CHIP
);
935 netif_carrier_off(priv
->netdev
);
938 if (priv
->can
.restart_ms
&&
939 (old_state
>= CAN_STATE_BUS_OFF
) &&
940 (new_state
< CAN_STATE_BUS_OFF
)) {
941 cf
->can_id
|= CAN_ERR_RESTARTED
;
942 netif_carrier_on(priv
->netdev
);
946 switch (dev
->family
) {
948 if (es
->leaf
.error_factor
) {
949 cf
->can_id
|= CAN_ERR_BUSERROR
| CAN_ERR_PROT
;
951 if (es
->leaf
.error_factor
& M16C_EF_ACKE
)
952 cf
->data
[3] = CAN_ERR_PROT_LOC_ACK
;
953 if (es
->leaf
.error_factor
& M16C_EF_CRCE
)
954 cf
->data
[3] = CAN_ERR_PROT_LOC_CRC_SEQ
;
955 if (es
->leaf
.error_factor
& M16C_EF_FORME
)
956 cf
->data
[2] |= CAN_ERR_PROT_FORM
;
957 if (es
->leaf
.error_factor
& M16C_EF_STFE
)
958 cf
->data
[2] |= CAN_ERR_PROT_STUFF
;
959 if (es
->leaf
.error_factor
& M16C_EF_BITE0
)
960 cf
->data
[2] |= CAN_ERR_PROT_BIT0
;
961 if (es
->leaf
.error_factor
& M16C_EF_BITE1
)
962 cf
->data
[2] |= CAN_ERR_PROT_BIT1
;
963 if (es
->leaf
.error_factor
& M16C_EF_TRE
)
964 cf
->data
[2] |= CAN_ERR_PROT_TX
;
968 if (es
->usbcan
.error_state
& USBCAN_ERROR_STATE_BUSERROR
) {
969 cf
->can_id
|= CAN_ERR_BUSERROR
;
974 cf
->data
[6] = es
->txerr
;
975 cf
->data
[7] = es
->rxerr
;
978 stats
->rx_bytes
+= cf
->can_dlc
;
982 /* For USBCAN, report error to userspace iff the channels's errors counter
983 * has changed, or we're the only channel seeing a bus error state.
985 static void kvaser_usbcan_conditionally_rx_error(const struct kvaser_usb
*dev
,
986 struct kvaser_usb_error_summary
*es
)
988 struct kvaser_usb_net_priv
*priv
;
992 channel
= es
->channel
;
993 if (channel
>= dev
->nchannels
) {
994 dev_err(dev
->udev
->dev
.parent
,
995 "Invalid channel number (%d)\n", channel
);
999 priv
= dev
->nets
[channel
];
1000 report_error
= false;
1002 if (es
->txerr
!= priv
->bec
.txerr
) {
1003 es
->usbcan
.error_state
|= USBCAN_ERROR_STATE_TX_ERROR
;
1004 report_error
= true;
1006 if (es
->rxerr
!= priv
->bec
.rxerr
) {
1007 es
->usbcan
.error_state
|= USBCAN_ERROR_STATE_RX_ERROR
;
1008 report_error
= true;
1010 if ((es
->status
& M16C_STATE_BUS_ERROR
) &&
1011 !(es
->usbcan
.other_ch_status
& M16C_STATE_BUS_ERROR
)) {
1012 es
->usbcan
.error_state
|= USBCAN_ERROR_STATE_BUSERROR
;
1013 report_error
= true;
1017 kvaser_usb_rx_error(dev
, es
);
1020 static void kvaser_usbcan_rx_error(const struct kvaser_usb
*dev
,
1021 const struct kvaser_msg
*msg
)
1023 struct kvaser_usb_error_summary es
= { };
1026 /* Sometimes errors are sent as unsolicited chip state events */
1027 case CMD_CHIP_STATE_EVENT
:
1028 es
.channel
= msg
->u
.usbcan
.chip_state_event
.channel
;
1029 es
.status
= msg
->u
.usbcan
.chip_state_event
.status
;
1030 es
.txerr
= msg
->u
.usbcan
.chip_state_event
.tx_errors_count
;
1031 es
.rxerr
= msg
->u
.usbcan
.chip_state_event
.rx_errors_count
;
1032 kvaser_usbcan_conditionally_rx_error(dev
, &es
);
1035 case CMD_CAN_ERROR_EVENT
:
1037 es
.status
= msg
->u
.usbcan
.error_event
.status_ch0
;
1038 es
.txerr
= msg
->u
.usbcan
.error_event
.tx_errors_count_ch0
;
1039 es
.rxerr
= msg
->u
.usbcan
.error_event
.rx_errors_count_ch0
;
1040 es
.usbcan
.other_ch_status
=
1041 msg
->u
.usbcan
.error_event
.status_ch1
;
1042 kvaser_usbcan_conditionally_rx_error(dev
, &es
);
1044 /* The USBCAN firmware supports up to 2 channels.
1045 * Now that ch0 was checked, check if ch1 has any errors.
1047 if (dev
->nchannels
== MAX_USBCAN_NET_DEVICES
) {
1049 es
.status
= msg
->u
.usbcan
.error_event
.status_ch1
;
1050 es
.txerr
= msg
->u
.usbcan
.error_event
.tx_errors_count_ch1
;
1051 es
.rxerr
= msg
->u
.usbcan
.error_event
.rx_errors_count_ch1
;
1052 es
.usbcan
.other_ch_status
=
1053 msg
->u
.usbcan
.error_event
.status_ch0
;
1054 kvaser_usbcan_conditionally_rx_error(dev
, &es
);
1059 dev_err(dev
->udev
->dev
.parent
, "Invalid msg id (%d)\n",
1064 static void kvaser_leaf_rx_error(const struct kvaser_usb
*dev
,
1065 const struct kvaser_msg
*msg
)
1067 struct kvaser_usb_error_summary es
= { };
1070 case CMD_CAN_ERROR_EVENT
:
1071 es
.channel
= msg
->u
.leaf
.error_event
.channel
;
1072 es
.status
= msg
->u
.leaf
.error_event
.status
;
1073 es
.txerr
= msg
->u
.leaf
.error_event
.tx_errors_count
;
1074 es
.rxerr
= msg
->u
.leaf
.error_event
.rx_errors_count
;
1075 es
.leaf
.error_factor
= msg
->u
.leaf
.error_event
.error_factor
;
1077 case CMD_LEAF_LOG_MESSAGE
:
1078 es
.channel
= msg
->u
.leaf
.log_message
.channel
;
1079 es
.status
= msg
->u
.leaf
.log_message
.data
[0];
1080 es
.txerr
= msg
->u
.leaf
.log_message
.data
[2];
1081 es
.rxerr
= msg
->u
.leaf
.log_message
.data
[3];
1082 es
.leaf
.error_factor
= msg
->u
.leaf
.log_message
.data
[1];
1084 case CMD_CHIP_STATE_EVENT
:
1085 es
.channel
= msg
->u
.leaf
.chip_state_event
.channel
;
1086 es
.status
= msg
->u
.leaf
.chip_state_event
.status
;
1087 es
.txerr
= msg
->u
.leaf
.chip_state_event
.tx_errors_count
;
1088 es
.rxerr
= msg
->u
.leaf
.chip_state_event
.rx_errors_count
;
1089 es
.leaf
.error_factor
= 0;
1092 dev_err(dev
->udev
->dev
.parent
, "Invalid msg id (%d)\n",
1097 kvaser_usb_rx_error(dev
, &es
);
1100 static void kvaser_usb_rx_can_err(const struct kvaser_usb_net_priv
*priv
,
1101 const struct kvaser_msg
*msg
)
1103 struct can_frame
*cf
;
1104 struct sk_buff
*skb
;
1105 struct net_device_stats
*stats
= &priv
->netdev
->stats
;
1107 if (msg
->u
.rx_can_header
.flag
& (MSG_FLAG_ERROR_FRAME
|
1109 netdev_err(priv
->netdev
, "Unknown error (flags: 0x%02x)\n",
1110 msg
->u
.rx_can_header
.flag
);
1116 if (msg
->u
.rx_can_header
.flag
& MSG_FLAG_OVERRUN
) {
1117 stats
->rx_over_errors
++;
1120 skb
= alloc_can_err_skb(priv
->netdev
, &cf
);
1122 stats
->rx_dropped
++;
1126 cf
->can_id
|= CAN_ERR_CRTL
;
1127 cf
->data
[1] = CAN_ERR_CRTL_RX_OVERFLOW
;
1129 stats
->rx_packets
++;
1130 stats
->rx_bytes
+= cf
->can_dlc
;
1135 static void kvaser_usb_rx_can_msg(const struct kvaser_usb
*dev
,
1136 const struct kvaser_msg
*msg
)
1138 struct kvaser_usb_net_priv
*priv
;
1139 struct can_frame
*cf
;
1140 struct sk_buff
*skb
;
1141 struct net_device_stats
*stats
;
1142 u8 channel
= msg
->u
.rx_can_header
.channel
;
1143 const u8
*rx_msg
= NULL
; /* GCC */
1145 if (channel
>= dev
->nchannels
) {
1146 dev_err(dev
->udev
->dev
.parent
,
1147 "Invalid channel number (%d)\n", channel
);
1151 priv
= dev
->nets
[channel
];
1152 stats
= &priv
->netdev
->stats
;
1154 if ((msg
->u
.rx_can_header
.flag
& MSG_FLAG_ERROR_FRAME
) &&
1155 (dev
->family
== KVASER_LEAF
&& msg
->id
== CMD_LEAF_LOG_MESSAGE
)) {
1156 kvaser_leaf_rx_error(dev
, msg
);
1158 } else if (msg
->u
.rx_can_header
.flag
& (MSG_FLAG_ERROR_FRAME
|
1160 MSG_FLAG_OVERRUN
)) {
1161 kvaser_usb_rx_can_err(priv
, msg
);
1163 } else if (msg
->u
.rx_can_header
.flag
& ~MSG_FLAG_REMOTE_FRAME
) {
1164 netdev_warn(priv
->netdev
,
1165 "Unhandled frame (flags: 0x%02x)",
1166 msg
->u
.rx_can_header
.flag
);
1170 switch (dev
->family
) {
1172 rx_msg
= msg
->u
.leaf
.rx_can
.msg
;
1175 rx_msg
= msg
->u
.usbcan
.rx_can
.msg
;
1179 skb
= alloc_can_skb(priv
->netdev
, &cf
);
1181 stats
->tx_dropped
++;
1185 if (dev
->family
== KVASER_LEAF
&& msg
->id
== CMD_LEAF_LOG_MESSAGE
) {
1186 cf
->can_id
= le32_to_cpu(msg
->u
.leaf
.log_message
.id
);
1187 if (cf
->can_id
& KVASER_EXTENDED_FRAME
)
1188 cf
->can_id
&= CAN_EFF_MASK
| CAN_EFF_FLAG
;
1190 cf
->can_id
&= CAN_SFF_MASK
;
1192 cf
->can_dlc
= get_can_dlc(msg
->u
.leaf
.log_message
.dlc
);
1194 if (msg
->u
.leaf
.log_message
.flags
& MSG_FLAG_REMOTE_FRAME
)
1195 cf
->can_id
|= CAN_RTR_FLAG
;
1197 memcpy(cf
->data
, &msg
->u
.leaf
.log_message
.data
,
1200 cf
->can_id
= ((rx_msg
[0] & 0x1f) << 6) | (rx_msg
[1] & 0x3f);
1202 if (msg
->id
== CMD_RX_EXT_MESSAGE
) {
1204 cf
->can_id
|= ((rx_msg
[2] & 0x0f) << 14) |
1205 ((rx_msg
[3] & 0xff) << 6) |
1207 cf
->can_id
|= CAN_EFF_FLAG
;
1210 cf
->can_dlc
= get_can_dlc(rx_msg
[5]);
1212 if (msg
->u
.rx_can_header
.flag
& MSG_FLAG_REMOTE_FRAME
)
1213 cf
->can_id
|= CAN_RTR_FLAG
;
1215 memcpy(cf
->data
, &rx_msg
[6],
1219 stats
->rx_packets
++;
1220 stats
->rx_bytes
+= cf
->can_dlc
;
1224 static void kvaser_usb_start_chip_reply(const struct kvaser_usb
*dev
,
1225 const struct kvaser_msg
*msg
)
1227 struct kvaser_usb_net_priv
*priv
;
1228 u8 channel
= msg
->u
.simple
.channel
;
1230 if (channel
>= dev
->nchannels
) {
1231 dev_err(dev
->udev
->dev
.parent
,
1232 "Invalid channel number (%d)\n", channel
);
1236 priv
= dev
->nets
[channel
];
1238 if (completion_done(&priv
->start_comp
) &&
1239 netif_queue_stopped(priv
->netdev
)) {
1240 netif_wake_queue(priv
->netdev
);
1242 netif_start_queue(priv
->netdev
);
1243 complete(&priv
->start_comp
);
1247 static void kvaser_usb_stop_chip_reply(const struct kvaser_usb
*dev
,
1248 const struct kvaser_msg
*msg
)
1250 struct kvaser_usb_net_priv
*priv
;
1251 u8 channel
= msg
->u
.simple
.channel
;
1253 if (channel
>= dev
->nchannels
) {
1254 dev_err(dev
->udev
->dev
.parent
,
1255 "Invalid channel number (%d)\n", channel
);
1259 priv
= dev
->nets
[channel
];
1261 complete(&priv
->stop_comp
);
1264 static void kvaser_usb_handle_message(const struct kvaser_usb
*dev
,
1265 const struct kvaser_msg
*msg
)
1268 case CMD_START_CHIP_REPLY
:
1269 kvaser_usb_start_chip_reply(dev
, msg
);
1272 case CMD_STOP_CHIP_REPLY
:
1273 kvaser_usb_stop_chip_reply(dev
, msg
);
1276 case CMD_RX_STD_MESSAGE
:
1277 case CMD_RX_EXT_MESSAGE
:
1278 kvaser_usb_rx_can_msg(dev
, msg
);
1281 case CMD_LEAF_LOG_MESSAGE
:
1282 if (dev
->family
!= KVASER_LEAF
)
1284 kvaser_usb_rx_can_msg(dev
, msg
);
1287 case CMD_CHIP_STATE_EVENT
:
1288 case CMD_CAN_ERROR_EVENT
:
1289 if (dev
->family
== KVASER_LEAF
)
1290 kvaser_leaf_rx_error(dev
, msg
);
1292 kvaser_usbcan_rx_error(dev
, msg
);
1295 case CMD_TX_ACKNOWLEDGE
:
1296 kvaser_usb_tx_acknowledge(dev
, msg
);
1299 /* Ignored messages */
1300 case CMD_USBCAN_CLOCK_OVERFLOW_EVENT
:
1301 if (dev
->family
!= KVASER_USBCAN
)
1305 case CMD_FLUSH_QUEUE_REPLY
:
1306 if (dev
->family
!= KVASER_LEAF
)
1311 warn
: dev_warn(dev
->udev
->dev
.parent
,
1312 "Unhandled message (%d)\n", msg
->id
);
1317 static void kvaser_usb_read_bulk_callback(struct urb
*urb
)
1319 struct kvaser_usb
*dev
= urb
->context
;
1320 struct kvaser_msg
*msg
;
1324 switch (urb
->status
) {
1331 dev_info(dev
->udev
->dev
.parent
, "Rx URB aborted (%d)\n",
1336 while (pos
<= urb
->actual_length
- MSG_HEADER_LEN
) {
1337 msg
= urb
->transfer_buffer
+ pos
;
1339 /* The Kvaser firmware can only read and write messages that
1340 * does not cross the USB's endpoint wMaxPacketSize boundary.
1341 * If a follow-up command crosses such boundary, firmware puts
1342 * a placeholder zero-length command in its place then aligns
1343 * the real command to the next max packet size.
1345 * Handle such cases or we're going to miss a significant
1346 * number of events in case of a heavy rx load on the bus.
1348 if (msg
->len
== 0) {
1349 pos
= round_up(pos
, le16_to_cpu(dev
->bulk_in
->
1354 if (pos
+ msg
->len
> urb
->actual_length
) {
1355 dev_err(dev
->udev
->dev
.parent
, "Format error\n");
1359 kvaser_usb_handle_message(dev
, msg
);
1364 usb_fill_bulk_urb(urb
, dev
->udev
,
1365 usb_rcvbulkpipe(dev
->udev
,
1366 dev
->bulk_in
->bEndpointAddress
),
1367 urb
->transfer_buffer
, RX_BUFFER_SIZE
,
1368 kvaser_usb_read_bulk_callback
, dev
);
1370 err
= usb_submit_urb(urb
, GFP_ATOMIC
);
1371 if (err
== -ENODEV
) {
1372 for (i
= 0; i
< dev
->nchannels
; i
++) {
1376 netif_device_detach(dev
->nets
[i
]->netdev
);
1379 dev_err(dev
->udev
->dev
.parent
,
1380 "Failed resubmitting read bulk urb: %d\n", err
);
1386 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb
*dev
)
1390 if (dev
->rxinitdone
)
1393 for (i
= 0; i
< MAX_RX_URBS
; i
++) {
1394 struct urb
*urb
= NULL
;
1398 urb
= usb_alloc_urb(0, GFP_KERNEL
);
1404 buf
= usb_alloc_coherent(dev
->udev
, RX_BUFFER_SIZE
,
1405 GFP_KERNEL
, &buf_dma
);
1407 dev_warn(dev
->udev
->dev
.parent
,
1408 "No memory left for USB buffer\n");
1414 usb_fill_bulk_urb(urb
, dev
->udev
,
1415 usb_rcvbulkpipe(dev
->udev
,
1416 dev
->bulk_in
->bEndpointAddress
),
1417 buf
, RX_BUFFER_SIZE
,
1418 kvaser_usb_read_bulk_callback
,
1420 urb
->transfer_dma
= buf_dma
;
1421 urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1422 usb_anchor_urb(urb
, &dev
->rx_submitted
);
1424 err
= usb_submit_urb(urb
, GFP_KERNEL
);
1426 usb_unanchor_urb(urb
);
1427 usb_free_coherent(dev
->udev
, RX_BUFFER_SIZE
, buf
,
1433 dev
->rxbuf
[i
] = buf
;
1434 dev
->rxbuf_dma
[i
] = buf_dma
;
1440 dev_warn(dev
->udev
->dev
.parent
,
1441 "Cannot setup read URBs, error %d\n", err
);
1443 } else if (i
< MAX_RX_URBS
) {
1444 dev_warn(dev
->udev
->dev
.parent
,
1445 "RX performances may be slow\n");
1448 dev
->rxinitdone
= true;
1453 static int kvaser_usb_set_opt_mode(const struct kvaser_usb_net_priv
*priv
)
1455 struct kvaser_msg
*msg
;
1458 msg
= kmalloc(sizeof(*msg
), GFP_KERNEL
);
1462 msg
->id
= CMD_SET_CTRL_MODE
;
1463 msg
->len
= MSG_HEADER_LEN
+ sizeof(struct kvaser_msg_ctrl_mode
);
1464 msg
->u
.ctrl_mode
.tid
= 0xff;
1465 msg
->u
.ctrl_mode
.channel
= priv
->channel
;
1467 if (priv
->can
.ctrlmode
& CAN_CTRLMODE_LISTENONLY
)
1468 msg
->u
.ctrl_mode
.ctrl_mode
= KVASER_CTRL_MODE_SILENT
;
1470 msg
->u
.ctrl_mode
.ctrl_mode
= KVASER_CTRL_MODE_NORMAL
;
1472 rc
= kvaser_usb_send_msg(priv
->dev
, msg
);
1478 static int kvaser_usb_start_chip(struct kvaser_usb_net_priv
*priv
)
1482 init_completion(&priv
->start_comp
);
1484 err
= kvaser_usb_send_simple_msg(priv
->dev
, CMD_START_CHIP
,
1489 if (!wait_for_completion_timeout(&priv
->start_comp
,
1490 msecs_to_jiffies(START_TIMEOUT
)))
1496 static int kvaser_usb_open(struct net_device
*netdev
)
1498 struct kvaser_usb_net_priv
*priv
= netdev_priv(netdev
);
1499 struct kvaser_usb
*dev
= priv
->dev
;
1502 err
= open_candev(netdev
);
1506 err
= kvaser_usb_setup_rx_urbs(dev
);
1510 err
= kvaser_usb_set_opt_mode(priv
);
1514 err
= kvaser_usb_start_chip(priv
);
1516 netdev_warn(netdev
, "Cannot start device, error %d\n", err
);
1520 priv
->can
.state
= CAN_STATE_ERROR_ACTIVE
;
1525 close_candev(netdev
);
1529 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv
*priv
)
1533 max_tx_urbs
= priv
->dev
->max_tx_urbs
;
1535 priv
->active_tx_contexts
= 0;
1536 for (i
= 0; i
< max_tx_urbs
; i
++)
1537 priv
->tx_contexts
[i
].echo_index
= max_tx_urbs
;
1540 /* This method might sleep. Do not call it in the atomic context
1541 * of URB completions.
1543 static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv
*priv
)
1545 usb_kill_anchored_urbs(&priv
->tx_submitted
);
1546 kvaser_usb_reset_tx_urb_contexts(priv
);
1549 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb
*dev
)
1553 usb_kill_anchored_urbs(&dev
->rx_submitted
);
1555 for (i
= 0; i
< MAX_RX_URBS
; i
++)
1556 usb_free_coherent(dev
->udev
, RX_BUFFER_SIZE
,
1560 for (i
= 0; i
< dev
->nchannels
; i
++) {
1561 struct kvaser_usb_net_priv
*priv
= dev
->nets
[i
];
1564 kvaser_usb_unlink_tx_urbs(priv
);
1568 static int kvaser_usb_stop_chip(struct kvaser_usb_net_priv
*priv
)
1572 init_completion(&priv
->stop_comp
);
1574 err
= kvaser_usb_send_simple_msg(priv
->dev
, CMD_STOP_CHIP
,
1579 if (!wait_for_completion_timeout(&priv
->stop_comp
,
1580 msecs_to_jiffies(STOP_TIMEOUT
)))
1586 static int kvaser_usb_flush_queue(struct kvaser_usb_net_priv
*priv
)
1588 struct kvaser_msg
*msg
;
1591 msg
= kmalloc(sizeof(*msg
), GFP_KERNEL
);
1595 msg
->id
= CMD_FLUSH_QUEUE
;
1596 msg
->len
= MSG_HEADER_LEN
+ sizeof(struct kvaser_msg_flush_queue
);
1597 msg
->u
.flush_queue
.channel
= priv
->channel
;
1598 msg
->u
.flush_queue
.flags
= 0x00;
1600 rc
= kvaser_usb_send_msg(priv
->dev
, msg
);
1606 static int kvaser_usb_close(struct net_device
*netdev
)
1608 struct kvaser_usb_net_priv
*priv
= netdev_priv(netdev
);
1609 struct kvaser_usb
*dev
= priv
->dev
;
1612 netif_stop_queue(netdev
);
1614 err
= kvaser_usb_flush_queue(priv
);
1616 netdev_warn(netdev
, "Cannot flush queue, error %d\n", err
);
1618 err
= kvaser_usb_send_simple_msg(dev
, CMD_RESET_CHIP
, priv
->channel
);
1620 netdev_warn(netdev
, "Cannot reset card, error %d\n", err
);
1622 err
= kvaser_usb_stop_chip(priv
);
1624 netdev_warn(netdev
, "Cannot stop device, error %d\n", err
);
1626 /* reset tx contexts */
1627 kvaser_usb_unlink_tx_urbs(priv
);
1629 priv
->can
.state
= CAN_STATE_STOPPED
;
1630 close_candev(priv
->netdev
);
1635 static void kvaser_usb_write_bulk_callback(struct urb
*urb
)
1637 struct kvaser_usb_tx_urb_context
*context
= urb
->context
;
1638 struct kvaser_usb_net_priv
*priv
;
1639 struct net_device
*netdev
;
1641 if (WARN_ON(!context
))
1644 priv
= context
->priv
;
1645 netdev
= priv
->netdev
;
1647 kfree(urb
->transfer_buffer
);
1649 if (!netif_device_present(netdev
))
1653 netdev_info(netdev
, "Tx URB aborted (%d)\n", urb
->status
);
1656 static netdev_tx_t
kvaser_usb_start_xmit(struct sk_buff
*skb
,
1657 struct net_device
*netdev
)
1659 struct kvaser_usb_net_priv
*priv
= netdev_priv(netdev
);
1660 struct kvaser_usb
*dev
= priv
->dev
;
1661 struct net_device_stats
*stats
= &netdev
->stats
;
1662 struct can_frame
*cf
= (struct can_frame
*)skb
->data
;
1663 struct kvaser_usb_tx_urb_context
*context
= NULL
;
1666 struct kvaser_msg
*msg
;
1667 int i
, err
, ret
= NETDEV_TX_OK
;
1668 u8
*msg_tx_can_flags
= NULL
; /* GCC */
1669 unsigned long flags
;
1671 if (can_dropped_invalid_skb(netdev
, skb
))
1672 return NETDEV_TX_OK
;
1674 urb
= usb_alloc_urb(0, GFP_ATOMIC
);
1676 stats
->tx_dropped
++;
1678 return NETDEV_TX_OK
;
1681 buf
= kmalloc(sizeof(struct kvaser_msg
), GFP_ATOMIC
);
1683 stats
->tx_dropped
++;
1689 msg
->len
= MSG_HEADER_LEN
+ sizeof(struct kvaser_msg_tx_can
);
1690 msg
->u
.tx_can
.channel
= priv
->channel
;
1692 switch (dev
->family
) {
1694 msg_tx_can_flags
= &msg
->u
.tx_can
.leaf
.flags
;
1697 msg_tx_can_flags
= &msg
->u
.tx_can
.usbcan
.flags
;
1701 *msg_tx_can_flags
= 0;
1703 if (cf
->can_id
& CAN_EFF_FLAG
) {
1704 msg
->id
= CMD_TX_EXT_MESSAGE
;
1705 msg
->u
.tx_can
.msg
[0] = (cf
->can_id
>> 24) & 0x1f;
1706 msg
->u
.tx_can
.msg
[1] = (cf
->can_id
>> 18) & 0x3f;
1707 msg
->u
.tx_can
.msg
[2] = (cf
->can_id
>> 14) & 0x0f;
1708 msg
->u
.tx_can
.msg
[3] = (cf
->can_id
>> 6) & 0xff;
1709 msg
->u
.tx_can
.msg
[4] = cf
->can_id
& 0x3f;
1711 msg
->id
= CMD_TX_STD_MESSAGE
;
1712 msg
->u
.tx_can
.msg
[0] = (cf
->can_id
>> 6) & 0x1f;
1713 msg
->u
.tx_can
.msg
[1] = cf
->can_id
& 0x3f;
1716 msg
->u
.tx_can
.msg
[5] = cf
->can_dlc
;
1717 memcpy(&msg
->u
.tx_can
.msg
[6], cf
->data
, cf
->can_dlc
);
1719 if (cf
->can_id
& CAN_RTR_FLAG
)
1720 *msg_tx_can_flags
|= MSG_FLAG_REMOTE_FRAME
;
1722 spin_lock_irqsave(&priv
->tx_contexts_lock
, flags
);
1723 for (i
= 0; i
< dev
->max_tx_urbs
; i
++) {
1724 if (priv
->tx_contexts
[i
].echo_index
== dev
->max_tx_urbs
) {
1725 context
= &priv
->tx_contexts
[i
];
1727 context
->echo_index
= i
;
1728 can_put_echo_skb(skb
, netdev
, context
->echo_index
);
1729 ++priv
->active_tx_contexts
;
1730 if (priv
->active_tx_contexts
>= dev
->max_tx_urbs
)
1731 netif_stop_queue(netdev
);
1736 spin_unlock_irqrestore(&priv
->tx_contexts_lock
, flags
);
1738 /* This should never happen; it implies a flow control bug */
1740 netdev_warn(netdev
, "cannot find free context\n");
1743 ret
= NETDEV_TX_BUSY
;
1747 context
->priv
= priv
;
1748 context
->dlc
= cf
->can_dlc
;
1750 msg
->u
.tx_can
.tid
= context
->echo_index
;
1752 usb_fill_bulk_urb(urb
, dev
->udev
,
1753 usb_sndbulkpipe(dev
->udev
,
1754 dev
->bulk_out
->bEndpointAddress
),
1756 kvaser_usb_write_bulk_callback
, context
);
1757 usb_anchor_urb(urb
, &priv
->tx_submitted
);
1759 err
= usb_submit_urb(urb
, GFP_ATOMIC
);
1760 if (unlikely(err
)) {
1761 spin_lock_irqsave(&priv
->tx_contexts_lock
, flags
);
1763 can_free_echo_skb(netdev
, context
->echo_index
);
1764 context
->echo_index
= dev
->max_tx_urbs
;
1765 --priv
->active_tx_contexts
;
1766 netif_wake_queue(netdev
);
1768 spin_unlock_irqrestore(&priv
->tx_contexts_lock
, flags
);
1770 usb_unanchor_urb(urb
);
1772 stats
->tx_dropped
++;
1775 netif_device_detach(netdev
);
1777 netdev_warn(netdev
, "Failed tx_urb %d\n", err
);
1789 static const struct net_device_ops kvaser_usb_netdev_ops
= {
1790 .ndo_open
= kvaser_usb_open
,
1791 .ndo_stop
= kvaser_usb_close
,
1792 .ndo_start_xmit
= kvaser_usb_start_xmit
,
1793 .ndo_change_mtu
= can_change_mtu
,
1796 static const struct can_bittiming_const kvaser_usb_bittiming_const
= {
1797 .name
= "kvaser_usb",
1798 .tseg1_min
= KVASER_USB_TSEG1_MIN
,
1799 .tseg1_max
= KVASER_USB_TSEG1_MAX
,
1800 .tseg2_min
= KVASER_USB_TSEG2_MIN
,
1801 .tseg2_max
= KVASER_USB_TSEG2_MAX
,
1802 .sjw_max
= KVASER_USB_SJW_MAX
,
1803 .brp_min
= KVASER_USB_BRP_MIN
,
1804 .brp_max
= KVASER_USB_BRP_MAX
,
1805 .brp_inc
= KVASER_USB_BRP_INC
,
1808 static int kvaser_usb_set_bittiming(struct net_device
*netdev
)
1810 struct kvaser_usb_net_priv
*priv
= netdev_priv(netdev
);
1811 struct can_bittiming
*bt
= &priv
->can
.bittiming
;
1812 struct kvaser_usb
*dev
= priv
->dev
;
1813 struct kvaser_msg
*msg
;
1816 msg
= kmalloc(sizeof(*msg
), GFP_KERNEL
);
1820 msg
->id
= CMD_SET_BUS_PARAMS
;
1821 msg
->len
= MSG_HEADER_LEN
+ sizeof(struct kvaser_msg_busparams
);
1822 msg
->u
.busparams
.channel
= priv
->channel
;
1823 msg
->u
.busparams
.tid
= 0xff;
1824 msg
->u
.busparams
.bitrate
= cpu_to_le32(bt
->bitrate
);
1825 msg
->u
.busparams
.sjw
= bt
->sjw
;
1826 msg
->u
.busparams
.tseg1
= bt
->prop_seg
+ bt
->phase_seg1
;
1827 msg
->u
.busparams
.tseg2
= bt
->phase_seg2
;
1829 if (priv
->can
.ctrlmode
& CAN_CTRLMODE_3_SAMPLES
)
1830 msg
->u
.busparams
.no_samp
= 3;
1832 msg
->u
.busparams
.no_samp
= 1;
1834 rc
= kvaser_usb_send_msg(dev
, msg
);
1840 static int kvaser_usb_set_mode(struct net_device
*netdev
,
1843 struct kvaser_usb_net_priv
*priv
= netdev_priv(netdev
);
1847 case CAN_MODE_START
:
1848 err
= kvaser_usb_simple_msg_async(priv
, CMD_START_CHIP
);
1859 static int kvaser_usb_get_berr_counter(const struct net_device
*netdev
,
1860 struct can_berr_counter
*bec
)
1862 struct kvaser_usb_net_priv
*priv
= netdev_priv(netdev
);
1869 static void kvaser_usb_remove_interfaces(struct kvaser_usb
*dev
)
1873 for (i
= 0; i
< dev
->nchannels
; i
++) {
1877 unregister_candev(dev
->nets
[i
]->netdev
);
1880 kvaser_usb_unlink_all_urbs(dev
);
1882 for (i
= 0; i
< dev
->nchannels
; i
++) {
1886 free_candev(dev
->nets
[i
]->netdev
);
1890 static int kvaser_usb_init_one(struct usb_interface
*intf
,
1891 const struct usb_device_id
*id
, int channel
)
1893 struct kvaser_usb
*dev
= usb_get_intfdata(intf
);
1894 struct net_device
*netdev
;
1895 struct kvaser_usb_net_priv
*priv
;
1898 err
= kvaser_usb_send_simple_msg(dev
, CMD_RESET_CHIP
, channel
);
1902 netdev
= alloc_candev(sizeof(*priv
) +
1903 dev
->max_tx_urbs
* sizeof(*priv
->tx_contexts
),
1906 dev_err(&intf
->dev
, "Cannot alloc candev\n");
1910 priv
= netdev_priv(netdev
);
1912 init_usb_anchor(&priv
->tx_submitted
);
1913 init_completion(&priv
->start_comp
);
1914 init_completion(&priv
->stop_comp
);
1917 priv
->netdev
= netdev
;
1918 priv
->channel
= channel
;
1920 spin_lock_init(&priv
->tx_contexts_lock
);
1921 kvaser_usb_reset_tx_urb_contexts(priv
);
1923 priv
->can
.state
= CAN_STATE_STOPPED
;
1924 priv
->can
.clock
.freq
= CAN_USB_CLOCK
;
1925 priv
->can
.bittiming_const
= &kvaser_usb_bittiming_const
;
1926 priv
->can
.do_set_bittiming
= kvaser_usb_set_bittiming
;
1927 priv
->can
.do_set_mode
= kvaser_usb_set_mode
;
1928 if (id
->driver_info
& KVASER_HAS_TXRX_ERRORS
)
1929 priv
->can
.do_get_berr_counter
= kvaser_usb_get_berr_counter
;
1930 priv
->can
.ctrlmode_supported
= CAN_CTRLMODE_3_SAMPLES
;
1931 if (id
->driver_info
& KVASER_HAS_SILENT_MODE
)
1932 priv
->can
.ctrlmode_supported
|= CAN_CTRLMODE_LISTENONLY
;
1934 netdev
->flags
|= IFF_ECHO
;
1936 netdev
->netdev_ops
= &kvaser_usb_netdev_ops
;
1938 SET_NETDEV_DEV(netdev
, &intf
->dev
);
1939 netdev
->dev_id
= channel
;
1941 dev
->nets
[channel
] = priv
;
1943 err
= register_candev(netdev
);
1945 dev_err(&intf
->dev
, "Failed to register can device\n");
1946 free_candev(netdev
);
1947 dev
->nets
[channel
] = NULL
;
1951 netdev_dbg(netdev
, "device registered\n");
1956 static int kvaser_usb_get_endpoints(const struct usb_interface
*intf
,
1957 struct usb_endpoint_descriptor
**in
,
1958 struct usb_endpoint_descriptor
**out
)
1960 const struct usb_host_interface
*iface_desc
;
1961 struct usb_endpoint_descriptor
*endpoint
;
1964 iface_desc
= &intf
->altsetting
[0];
1966 for (i
= 0; i
< iface_desc
->desc
.bNumEndpoints
; ++i
) {
1967 endpoint
= &iface_desc
->endpoint
[i
].desc
;
1969 if (!*in
&& usb_endpoint_is_bulk_in(endpoint
))
1972 if (!*out
&& usb_endpoint_is_bulk_out(endpoint
))
1975 /* use first bulk endpoint for in and out */
1983 static int kvaser_usb_probe(struct usb_interface
*intf
,
1984 const struct usb_device_id
*id
)
1986 struct kvaser_usb
*dev
;
1990 dev
= devm_kzalloc(&intf
->dev
, sizeof(*dev
), GFP_KERNEL
);
1994 if (kvaser_is_leaf(id
)) {
1995 dev
->family
= KVASER_LEAF
;
1996 } else if (kvaser_is_usbcan(id
)) {
1997 dev
->family
= KVASER_USBCAN
;
2000 "Product ID (%d) does not belong to any known Kvaser USB family",
2005 err
= kvaser_usb_get_endpoints(intf
, &dev
->bulk_in
, &dev
->bulk_out
);
2007 dev_err(&intf
->dev
, "Cannot get usb endpoint(s)");
2011 dev
->udev
= interface_to_usbdev(intf
);
2013 init_usb_anchor(&dev
->rx_submitted
);
2015 usb_set_intfdata(intf
, dev
);
2017 /* On some x86 laptops, plugging a Kvaser device again after
2018 * an unplug makes the firmware always ignore the very first
2019 * command. For such a case, provide some room for retries
2020 * instead of completely exiting the driver.
2023 err
= kvaser_usb_get_software_info(dev
);
2024 } while (--retry
&& err
== -ETIMEDOUT
);
2028 "Cannot get software infos, error %d\n", err
);
2032 dev_dbg(&intf
->dev
, "Firmware version: %d.%d.%d\n",
2033 ((dev
->fw_version
>> 24) & 0xff),
2034 ((dev
->fw_version
>> 16) & 0xff),
2035 (dev
->fw_version
& 0xffff));
2037 dev_dbg(&intf
->dev
, "Max outstanding tx = %d URBs\n", dev
->max_tx_urbs
);
2039 err
= kvaser_usb_get_card_info(dev
);
2042 "Cannot get card infos, error %d\n", err
);
2046 for (i
= 0; i
< dev
->nchannels
; i
++) {
2047 err
= kvaser_usb_init_one(intf
, id
, i
);
2049 kvaser_usb_remove_interfaces(dev
);
2057 static void kvaser_usb_disconnect(struct usb_interface
*intf
)
2059 struct kvaser_usb
*dev
= usb_get_intfdata(intf
);
2061 usb_set_intfdata(intf
, NULL
);
2066 kvaser_usb_remove_interfaces(dev
);
2069 static struct usb_driver kvaser_usb_driver
= {
2070 .name
= "kvaser_usb",
2071 .probe
= kvaser_usb_probe
,
2072 .disconnect
= kvaser_usb_disconnect
,
2073 .id_table
= kvaser_usb_table
,
2076 module_usb_driver(kvaser_usb_driver
);
2078 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
2079 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
2080 MODULE_LICENSE("GPL v2");