root/drivers/net/can/usb/kvaser_usb/kvaser_usb.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Parts of this driver are based on the following:
   3  *  - Kvaser linux leaf driver (version 4.78)
   4  *  - CAN driver for esd CAN-USB/2
   5  *  - Kvaser linux usbcanII driver (version 5.3)
   6  *  - Kvaser linux mhydra driver (version 5.24)
   7  *
   8  * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved.
   9  * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh
  10  * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be>
  11  * Copyright (C) 2015 Valeo S.A.
  12  */
  13 
  14 #ifndef KVASER_USB_H
  15 #define KVASER_USB_H
  16 
  17 /* Kvaser USB CAN dongles are divided into three major platforms:
  18  * - Hydra: Running firmware labeled as 'mhydra'
  19  * - Leaf: Based on Renesas M32C or Freescale i.MX28, running firmware labeled
  20  *         as 'filo'
  21  * - UsbcanII: Based on Renesas M16C, running firmware labeled as 'helios'
  22  */
  23 
  24 #include <linux/completion.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/types.h>
  27 #include <linux/usb.h>
  28 
  29 #include <linux/can.h>
  30 #include <linux/can/dev.h>
  31 
  32 #define KVASER_USB_MAX_RX_URBS                  4
  33 #define KVASER_USB_MAX_TX_URBS                  128
  34 #define KVASER_USB_TIMEOUT                      1000 /* msecs */
  35 #define KVASER_USB_RX_BUFFER_SIZE               3072
  36 #define KVASER_USB_MAX_NET_DEVICES              5
  37 
  38 /* USB devices features */
  39 #define KVASER_USB_HAS_SILENT_MODE              BIT(0)
  40 #define KVASER_USB_HAS_TXRX_ERRORS              BIT(1)
  41 
  42 /* Device capabilities */
  43 #define KVASER_USB_CAP_BERR_CAP                 0x01
  44 #define KVASER_USB_CAP_EXT_CAP                  0x02
  45 #define KVASER_USB_HYDRA_CAP_EXT_CMD            0x04
  46 
  47 struct kvaser_usb_dev_cfg;
  48 
  49 enum kvaser_usb_leaf_family {
  50         KVASER_LEAF,
  51         KVASER_USBCAN,
  52 };
  53 
  54 #define KVASER_USB_HYDRA_MAX_CMD_LEN            128
  55 struct kvaser_usb_dev_card_data_hydra {
  56         u8 channel_to_he[KVASER_USB_MAX_NET_DEVICES];
  57         u8 sysdbg_he;
  58         spinlock_t transid_lock; /* lock for transid */
  59         u16 transid;
  60         /* lock for usb_rx_leftover and usb_rx_leftover_len */
  61         spinlock_t usb_rx_leftover_lock;
  62         u8 usb_rx_leftover[KVASER_USB_HYDRA_MAX_CMD_LEN];
  63         u8 usb_rx_leftover_len;
  64 };
  65 struct kvaser_usb_dev_card_data {
  66         u32 ctrlmode_supported;
  67         u32 capabilities;
  68         union {
  69                 struct {
  70                         enum kvaser_usb_leaf_family family;
  71                 } leaf;
  72                 struct kvaser_usb_dev_card_data_hydra hydra;
  73         };
  74 };
  75 
  76 /* Context for an outstanding, not yet ACKed, transmission */
  77 struct kvaser_usb_tx_urb_context {
  78         struct kvaser_usb_net_priv *priv;
  79         u32 echo_index;
  80         int dlc;
  81 };
  82 
  83 struct kvaser_usb {
  84         struct usb_device *udev;
  85         struct usb_interface *intf;
  86         struct kvaser_usb_net_priv *nets[KVASER_USB_MAX_NET_DEVICES];
  87         const struct kvaser_usb_dev_ops *ops;
  88         const struct kvaser_usb_dev_cfg *cfg;
  89 
  90         struct usb_endpoint_descriptor *bulk_in, *bulk_out;
  91         struct usb_anchor rx_submitted;
  92 
  93         /* @max_tx_urbs: Firmware-reported maximum number of outstanding,
  94          * not yet ACKed, transmissions on this device. This value is
  95          * also used as a sentinel for marking free tx contexts.
  96          */
  97         u32 fw_version;
  98         unsigned int nchannels;
  99         unsigned int max_tx_urbs;
 100         struct kvaser_usb_dev_card_data card_data;
 101 
 102         bool rxinitdone;
 103         void *rxbuf[KVASER_USB_MAX_RX_URBS];
 104         dma_addr_t rxbuf_dma[KVASER_USB_MAX_RX_URBS];
 105 };
 106 
 107 struct kvaser_usb_net_priv {
 108         struct can_priv can;
 109         struct can_berr_counter bec;
 110 
 111         struct kvaser_usb *dev;
 112         struct net_device *netdev;
 113         int channel;
 114 
 115         struct completion start_comp, stop_comp, flush_comp;
 116         struct usb_anchor tx_submitted;
 117 
 118         spinlock_t tx_contexts_lock; /* lock for active_tx_contexts */
 119         int active_tx_contexts;
 120         struct kvaser_usb_tx_urb_context tx_contexts[];
 121 };
 122 
 123 /**
 124  * struct kvaser_usb_dev_ops - Device specific functions
 125  * @dev_set_mode:               used for can.do_set_mode
 126  * @dev_set_bittiming:          used for can.do_set_bittiming
 127  * @dev_set_data_bittiming:     used for can.do_set_data_bittiming
 128  * @dev_get_berr_counter:       used for can.do_get_berr_counter
 129  *
 130  * @dev_setup_endpoints:        setup USB in and out endpoints
 131  * @dev_init_card:              initialize card
 132  * @dev_get_software_info:      get software info
 133  * @dev_get_software_details:   get software details
 134  * @dev_get_card_info:          get card info
 135  * @dev_get_capabilities:       discover device capabilities
 136  *
 137  * @dev_set_opt_mode:           set ctrlmod
 138  * @dev_start_chip:             start the CAN controller
 139  * @dev_stop_chip:              stop the CAN controller
 140  * @dev_reset_chip:             reset the CAN controller
 141  * @dev_flush_queue:            flush outstanding CAN messages
 142  * @dev_read_bulk_callback:     handle incoming commands
 143  * @dev_frame_to_cmd:           translate struct can_frame into device command
 144  */
 145 struct kvaser_usb_dev_ops {
 146         int (*dev_set_mode)(struct net_device *netdev, enum can_mode mode);
 147         int (*dev_set_bittiming)(struct net_device *netdev);
 148         int (*dev_set_data_bittiming)(struct net_device *netdev);
 149         int (*dev_get_berr_counter)(const struct net_device *netdev,
 150                                     struct can_berr_counter *bec);
 151         int (*dev_setup_endpoints)(struct kvaser_usb *dev);
 152         int (*dev_init_card)(struct kvaser_usb *dev);
 153         int (*dev_get_software_info)(struct kvaser_usb *dev);
 154         int (*dev_get_software_details)(struct kvaser_usb *dev);
 155         int (*dev_get_card_info)(struct kvaser_usb *dev);
 156         int (*dev_get_capabilities)(struct kvaser_usb *dev);
 157         int (*dev_set_opt_mode)(const struct kvaser_usb_net_priv *priv);
 158         int (*dev_start_chip)(struct kvaser_usb_net_priv *priv);
 159         int (*dev_stop_chip)(struct kvaser_usb_net_priv *priv);
 160         int (*dev_reset_chip)(struct kvaser_usb *dev, int channel);
 161         int (*dev_flush_queue)(struct kvaser_usb_net_priv *priv);
 162         void (*dev_read_bulk_callback)(struct kvaser_usb *dev, void *buf,
 163                                        int len);
 164         void *(*dev_frame_to_cmd)(const struct kvaser_usb_net_priv *priv,
 165                                   const struct sk_buff *skb, int *frame_len,
 166                                   int *cmd_len, u16 transid);
 167 };
 168 
 169 struct kvaser_usb_dev_cfg {
 170         const struct can_clock clock;
 171         const unsigned int timestamp_freq;
 172         const struct can_bittiming_const * const bittiming_const;
 173         const struct can_bittiming_const * const data_bittiming_const;
 174 };
 175 
 176 extern const struct kvaser_usb_dev_ops kvaser_usb_hydra_dev_ops;
 177 extern const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops;
 178 
 179 int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len,
 180                         int *actual_len);
 181 
 182 int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len);
 183 
 184 int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd,
 185                               int len);
 186 
 187 int kvaser_usb_can_rx_over_error(struct net_device *netdev);
 188 #endif /* KVASER_USB_H */