1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * CAN driver for PEAK System USB adapters 4 * Derived from the PCAN project file driver/src/pcan_usb_core.c 5 * 6 * Copyright (C) 2003-2010 PEAK System-Technik GmbH 7 * Copyright (C) 2010-2012 Stephane Grosjean <s.grosjean@peak-system.com> 8 * 9 * Many thanks to Klaus Hitschler <klaus.hitschler@gmx.de> 10 */ 11 #ifndef PCAN_USB_CORE_H 12 #define PCAN_USB_CORE_H 13 14 /* PEAK-System vendor id. */ 15 #define PCAN_USB_VENDOR_ID 0x0c72 16 17 /* supported device ids. */ 18 #define PCAN_USB_PRODUCT_ID 0x000c 19 #define PCAN_USBPRO_PRODUCT_ID 0x000d 20 #define PCAN_USBPROFD_PRODUCT_ID 0x0011 21 #define PCAN_USBFD_PRODUCT_ID 0x0012 22 #define PCAN_USBCHIP_PRODUCT_ID 0x0013 23 #define PCAN_USBX6_PRODUCT_ID 0x0014 24 25 #define PCAN_USB_DRIVER_NAME "peak_usb" 26 27 /* number of urbs that are submitted for rx/tx per channel */ 28 #define PCAN_USB_MAX_RX_URBS 4 29 #define PCAN_USB_MAX_TX_URBS 10 30 31 /* usb adapters maximum channels per usb interface */ 32 #define PCAN_USB_MAX_CHANNEL 2 33 34 /* maximum length of the usb commands sent to/received from the devices */ 35 #define PCAN_USB_MAX_CMD_LEN 32 36 37 struct peak_usb_device; 38 39 /* PEAK-System USB adapter descriptor */ 40 struct peak_usb_adapter { 41 char *name; 42 u32 device_id; 43 u32 ctrlmode_supported; 44 struct can_clock clock; 45 const struct can_bittiming_const * const bittiming_const; 46 const struct can_bittiming_const * const data_bittiming_const; 47 unsigned int ctrl_count; 48 49 int (*intf_probe)(struct usb_interface *intf); 50 51 int (*dev_init)(struct peak_usb_device *dev); 52 void (*dev_exit)(struct peak_usb_device *dev); 53 void (*dev_free)(struct peak_usb_device *dev); 54 int (*dev_open)(struct peak_usb_device *dev); 55 int (*dev_close)(struct peak_usb_device *dev); 56 int (*dev_set_bittiming)(struct peak_usb_device *dev, 57 struct can_bittiming *bt); 58 int (*dev_set_data_bittiming)(struct peak_usb_device *dev, 59 struct can_bittiming *bt); 60 int (*dev_set_bus)(struct peak_usb_device *dev, u8 onoff); 61 int (*dev_get_device_id)(struct peak_usb_device *dev, u32 *device_id); 62 int (*dev_decode_buf)(struct peak_usb_device *dev, struct urb *urb); 63 int (*dev_encode_msg)(struct peak_usb_device *dev, struct sk_buff *skb, 64 u8 *obuf, size_t *size); 65 int (*dev_start)(struct peak_usb_device *dev); 66 int (*dev_stop)(struct peak_usb_device *dev); 67 int (*dev_restart_async)(struct peak_usb_device *dev, struct urb *urb, 68 u8 *buf); 69 int (*do_get_berr_counter)(const struct net_device *netdev, 70 struct can_berr_counter *bec); 71 u8 ep_msg_in; 72 u8 ep_msg_out[PCAN_USB_MAX_CHANNEL]; 73 u8 ts_used_bits; 74 u32 ts_period; 75 u8 us_per_ts_shift; 76 u32 us_per_ts_scale; 77 78 int rx_buffer_size; 79 int tx_buffer_size; 80 int sizeof_dev_private; 81 }; 82 83 extern const struct peak_usb_adapter pcan_usb; 84 extern const struct peak_usb_adapter pcan_usb_pro; 85 extern const struct peak_usb_adapter pcan_usb_fd; 86 extern const struct peak_usb_adapter pcan_usb_chip; 87 extern const struct peak_usb_adapter pcan_usb_pro_fd; 88 extern const struct peak_usb_adapter pcan_usb_x6; 89 90 struct peak_time_ref { 91 ktime_t tv_host_0, tv_host; 92 u32 ts_dev_1, ts_dev_2; 93 u64 ts_total; 94 u32 tick_count; 95 const struct peak_usb_adapter *adapter; 96 }; 97 98 struct peak_tx_urb_context { 99 struct peak_usb_device *dev; 100 u32 echo_index; 101 u8 data_len; 102 struct urb *urb; 103 }; 104 105 #define PCAN_USB_STATE_CONNECTED 0x00000001 106 #define PCAN_USB_STATE_STARTED 0x00000002 107 108 /* PEAK-System USB device */ 109 struct peak_usb_device { 110 struct can_priv can; 111 const struct peak_usb_adapter *adapter; 112 unsigned int ctrl_idx; 113 u32 state; 114 115 struct sk_buff *echo_skb[PCAN_USB_MAX_TX_URBS]; 116 117 struct usb_device *udev; 118 struct net_device *netdev; 119 120 atomic_t active_tx_urbs; 121 struct usb_anchor tx_submitted; 122 struct peak_tx_urb_context tx_contexts[PCAN_USB_MAX_TX_URBS]; 123 124 u8 *cmd_buf; 125 struct usb_anchor rx_submitted; 126 127 u32 device_number; 128 u8 device_rev; 129 130 u8 ep_msg_in; 131 u8 ep_msg_out; 132 133 u16 bus_load; 134 135 struct peak_usb_device *prev_siblings; 136 struct peak_usb_device *next_siblings; 137 }; 138 139 void pcan_dump_mem(char *prompt, void *p, int l); 140 141 /* common timestamp management */ 142 void peak_usb_init_time_ref(struct peak_time_ref *time_ref, 143 const struct peak_usb_adapter *adapter); 144 void peak_usb_update_ts_now(struct peak_time_ref *time_ref, u32 ts_now); 145 void peak_usb_set_ts_now(struct peak_time_ref *time_ref, u32 ts_now); 146 void peak_usb_get_ts_time(struct peak_time_ref *time_ref, u32 ts, ktime_t *tv); 147 int peak_usb_netif_rx(struct sk_buff *skb, 148 struct peak_time_ref *time_ref, u32 ts_low); 149 void peak_usb_async_complete(struct urb *urb); 150 void peak_usb_restart_complete(struct peak_usb_device *dev); 151 152 #endif 153