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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 | /* SPDX-License-Identifier: GPL-2.0 */ /* Parts of this driver are based on the following: * - Kvaser linux leaf driver (version 4.78) * - CAN driver for esd CAN-USB/2 * - Kvaser linux usbcanII driver (version 5.3) * - Kvaser linux mhydra driver (version 5.24) * * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved. * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be> * Copyright (C) 2015 Valeo S.A. */ #ifndef KVASER_USB_H #define KVASER_USB_H /* Kvaser USB CAN dongles are divided into three major platforms: * - Hydra: Running firmware labeled as 'mhydra' * - Leaf: Based on Renesas M32C or Freescale i.MX28, running firmware labeled * as 'filo' * - UsbcanII: Based on Renesas M16C, running firmware labeled as 'helios' */ #include <linux/completion.h> #include <linux/spinlock.h> #include <linux/types.h> #include <linux/usb.h> #include <linux/can.h> #include <linux/can/dev.h> #define KVASER_USB_MAX_RX_URBS 4 #define KVASER_USB_MAX_TX_URBS 128 #define KVASER_USB_TIMEOUT 1000 /* msecs */ #define KVASER_USB_RX_BUFFER_SIZE 3072 #define KVASER_USB_MAX_NET_DEVICES 5 /* Kvaser USB device quirks */ #define KVASER_USB_QUIRK_HAS_SILENT_MODE BIT(0) #define KVASER_USB_QUIRK_HAS_TXRX_ERRORS BIT(1) #define KVASER_USB_QUIRK_IGNORE_CLK_FREQ BIT(2) #define KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP BIT(3) /* Device capabilities */ #define KVASER_USB_CAP_BERR_CAP 0x01 #define KVASER_USB_CAP_EXT_CAP 0x02 #define KVASER_USB_HYDRA_CAP_EXT_CMD 0x04 struct kvaser_usb_dev_cfg; enum kvaser_usb_leaf_family { KVASER_LEAF, KVASER_USBCAN, }; #define KVASER_USB_HYDRA_MAX_CMD_LEN 128 struct kvaser_usb_dev_card_data_hydra { u8 channel_to_he[KVASER_USB_MAX_NET_DEVICES]; u8 sysdbg_he; spinlock_t transid_lock; /* lock for transid */ u16 transid; /* lock for usb_rx_leftover and usb_rx_leftover_len */ spinlock_t usb_rx_leftover_lock; u8 usb_rx_leftover[KVASER_USB_HYDRA_MAX_CMD_LEN]; u8 usb_rx_leftover_len; }; struct kvaser_usb_dev_card_data { u32 ctrlmode_supported; u32 capabilities; struct kvaser_usb_dev_card_data_hydra hydra; }; /* Context for an outstanding, not yet ACKed, transmission */ struct kvaser_usb_tx_urb_context { struct kvaser_usb_net_priv *priv; u32 echo_index; }; struct kvaser_usb_busparams { __le32 bitrate; u8 tseg1; u8 tseg2; u8 sjw; u8 nsamples; } __packed; struct kvaser_usb { struct usb_device *udev; struct usb_interface *intf; struct kvaser_usb_net_priv *nets[KVASER_USB_MAX_NET_DEVICES]; const struct kvaser_usb_driver_info *driver_info; const struct kvaser_usb_dev_cfg *cfg; struct usb_endpoint_descriptor *bulk_in, *bulk_out; struct usb_anchor rx_submitted; /* @max_tx_urbs: Firmware-reported maximum number of outstanding, * not yet ACKed, transmissions on this device. This value is * also used as a sentinel for marking free tx contexts. */ u32 fw_version; unsigned int nchannels; unsigned int max_tx_urbs; struct kvaser_usb_dev_card_data card_data; bool rxinitdone; void *rxbuf[KVASER_USB_MAX_RX_URBS]; dma_addr_t rxbuf_dma[KVASER_USB_MAX_RX_URBS]; }; struct kvaser_usb_net_priv { struct can_priv can; struct can_berr_counter bec; /* subdriver-specific data */ void *sub_priv; struct kvaser_usb *dev; struct net_device *netdev; int channel; struct completion start_comp, stop_comp, flush_comp, get_busparams_comp; struct usb_anchor tx_submitted; struct kvaser_usb_busparams busparams_nominal, busparams_data; spinlock_t tx_contexts_lock; /* lock for active_tx_contexts */ int active_tx_contexts; struct kvaser_usb_tx_urb_context tx_contexts[]; }; /** * struct kvaser_usb_dev_ops - Device specific functions * @dev_set_mode: used for can.do_set_mode * @dev_set_bittiming: used for can.do_set_bittiming * @dev_get_busparams: readback arbitration busparams * @dev_set_data_bittiming: used for can.do_set_data_bittiming * @dev_get_data_busparams: readback data busparams * @dev_get_berr_counter: used for can.do_get_berr_counter * * @dev_setup_endpoints: setup USB in and out endpoints * @dev_init_card: initialize card * @dev_init_channel: initialize channel * @dev_remove_channel: uninitialize channel * @dev_get_software_info: get software info * @dev_get_software_details: get software details * @dev_get_card_info: get card info * @dev_get_capabilities: discover device capabilities * * @dev_set_opt_mode: set ctrlmod * @dev_start_chip: start the CAN controller * @dev_stop_chip: stop the CAN controller * @dev_reset_chip: reset the CAN controller * @dev_flush_queue: flush outstanding CAN messages * @dev_read_bulk_callback: handle incoming commands * @dev_frame_to_cmd: translate struct can_frame into device command */ struct kvaser_usb_dev_ops { int (*dev_set_mode)(struct net_device *netdev, enum can_mode mode); int (*dev_set_bittiming)(const struct net_device *netdev, const struct kvaser_usb_busparams *busparams); int (*dev_get_busparams)(struct kvaser_usb_net_priv *priv); int (*dev_set_data_bittiming)(const struct net_device *netdev, const struct kvaser_usb_busparams *busparams); int (*dev_get_data_busparams)(struct kvaser_usb_net_priv *priv); int (*dev_get_berr_counter)(const struct net_device *netdev, struct can_berr_counter *bec); int (*dev_setup_endpoints)(struct kvaser_usb *dev); int (*dev_init_card)(struct kvaser_usb *dev); int (*dev_init_channel)(struct kvaser_usb_net_priv *priv); void (*dev_remove_channel)(struct kvaser_usb_net_priv *priv); int (*dev_get_software_info)(struct kvaser_usb *dev); int (*dev_get_software_details)(struct kvaser_usb *dev); int (*dev_get_card_info)(struct kvaser_usb *dev); int (*dev_get_capabilities)(struct kvaser_usb *dev); int (*dev_set_opt_mode)(const struct kvaser_usb_net_priv *priv); int (*dev_start_chip)(struct kvaser_usb_net_priv *priv); int (*dev_stop_chip)(struct kvaser_usb_net_priv *priv); int (*dev_reset_chip)(struct kvaser_usb *dev, int channel); int (*dev_flush_queue)(struct kvaser_usb_net_priv *priv); void (*dev_read_bulk_callback)(struct kvaser_usb *dev, void *buf, int len); void *(*dev_frame_to_cmd)(const struct kvaser_usb_net_priv *priv, const struct sk_buff *skb, int *cmd_len, u16 transid); }; struct kvaser_usb_driver_info { u32 quirks; enum kvaser_usb_leaf_family family; const struct kvaser_usb_dev_ops *ops; }; struct kvaser_usb_dev_cfg { const struct can_clock clock; const unsigned int timestamp_freq; const struct can_bittiming_const * const bittiming_const; const struct can_bittiming_const * const data_bittiming_const; }; extern const struct kvaser_usb_dev_ops kvaser_usb_hydra_dev_ops; extern const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops; void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv); int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len, int *actual_len); int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len); int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd, int len); int kvaser_usb_can_rx_over_error(struct net_device *netdev); extern const struct can_bittiming_const kvaser_usb_flexc_bittiming_const; #endif /* KVASER_USB_H */ |