1 /* 2 * CAN driver for PEAK System USB adapters 3 * Derived from the PCAN project file driver/src/pcan_usb_core.c 4 * 5 * Copyright (C) 2003-2010 PEAK System-Technik GmbH 6 * Copyright (C) 2010-2012 Stephane Grosjean <s.grosjean@peak-system.com> 7 * 8 * Many thanks to Klaus Hitschler <klaus.hitschler@gmx.de> 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published 12 * by the Free Software Foundation; version 2 of the License. 13 * 14 * This program is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 */ 19 #ifndef PCAN_USB_CORE_H 20 #define PCAN_USB_CORE_H 21 22 /* PEAK-System vendor id. */ 23 #define PCAN_USB_VENDOR_ID 0x0c72 24 25 /* supported device ids. */ 26 #define PCAN_USB_PRODUCT_ID 0x000c 27 #define PCAN_USBPRO_PRODUCT_ID 0x000d 28 29 #define PCAN_USB_DRIVER_NAME "peak_usb" 30 31 /* number of urbs that are submitted for rx/tx per channel */ 32 #define PCAN_USB_MAX_RX_URBS 4 33 #define PCAN_USB_MAX_TX_URBS 10 34 35 /* usb adapters maximum channels per usb interface */ 36 #define PCAN_USB_MAX_CHANNEL 2 37 38 /* maximum length of the usb commands sent to/received from the devices */ 39 #define PCAN_USB_MAX_CMD_LEN 32 40 41 struct peak_usb_device; 42 43 /* PEAK-System USB adapter descriptor */ 44 struct peak_usb_adapter { 45 char *name; 46 u32 device_id; 47 struct can_clock clock; 48 struct can_bittiming_const bittiming_const; 49 unsigned int ctrl_count; 50 51 int (*intf_probe)(struct usb_interface *intf); 52 53 int (*dev_init)(struct peak_usb_device *dev); 54 void (*dev_exit)(struct peak_usb_device *dev); 55 void (*dev_free)(struct peak_usb_device *dev); 56 int (*dev_open)(struct peak_usb_device *dev); 57 int (*dev_close)(struct peak_usb_device *dev); 58 int (*dev_set_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 u8 ep_msg_in; 70 u8 ep_msg_out[PCAN_USB_MAX_CHANNEL]; 71 u8 ts_used_bits; 72 u32 ts_period; 73 u8 us_per_ts_shift; 74 u32 us_per_ts_scale; 75 76 int rx_buffer_size; 77 int tx_buffer_size; 78 int sizeof_dev_private; 79 }; 80 81 extern struct peak_usb_adapter pcan_usb; 82 extern struct peak_usb_adapter pcan_usb_pro; 83 84 struct peak_time_ref { 85 struct timeval tv_host_0, tv_host; 86 u32 ts_dev_1, ts_dev_2; 87 u64 ts_total; 88 u32 tick_count; 89 struct peak_usb_adapter *adapter; 90 }; 91 92 struct peak_tx_urb_context { 93 struct peak_usb_device *dev; 94 u32 echo_index; 95 u8 dlc; 96 struct urb *urb; 97 }; 98 99 #define PCAN_USB_STATE_CONNECTED 0x00000001 100 #define PCAN_USB_STATE_STARTED 0x00000002 101 102 /* PEAK-System USB device */ 103 struct peak_usb_device { 104 struct can_priv can; 105 struct peak_usb_adapter *adapter; 106 unsigned int ctrl_idx; 107 int open_time; 108 u32 state; 109 110 struct sk_buff *echo_skb[PCAN_USB_MAX_TX_URBS]; 111 112 struct usb_device *udev; 113 struct net_device *netdev; 114 115 atomic_t active_tx_urbs; 116 struct usb_anchor tx_submitted; 117 struct peak_tx_urb_context tx_contexts[PCAN_USB_MAX_TX_URBS]; 118 119 u8 *cmd_buf; 120 struct usb_anchor rx_submitted; 121 122 u32 device_number; 123 u8 device_rev; 124 125 u8 ep_msg_in; 126 u8 ep_msg_out; 127 128 u16 bus_load; 129 130 struct peak_usb_device *prev_siblings; 131 struct peak_usb_device *next_siblings; 132 }; 133 134 void dump_mem(char *prompt, void *p, int l); 135 136 /* common timestamp management */ 137 void peak_usb_init_time_ref(struct peak_time_ref *time_ref, 138 struct peak_usb_adapter *adapter); 139 void peak_usb_update_ts_now(struct peak_time_ref *time_ref, u32 ts_now); 140 void peak_usb_set_ts_now(struct peak_time_ref *time_ref, u32 ts_now); 141 void peak_usb_get_ts_tv(struct peak_time_ref *time_ref, u32 ts, 142 struct timeval *tv); 143 144 void peak_usb_async_complete(struct urb *urb); 145 void peak_usb_restart_complete(struct peak_usb_device *dev); 146 #endif 147