2 * Header file for the Linux CAN-bus driver.
3 * Written by Jan Kriz email:johen@post.cz
4 * This software is released under the GPL-License.
5 * Version lincan-0.3 17 Jul 2008
11 #include <linux/errno.h>
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/kref.h>
15 #include <asm/uaccess.h>
16 #include <linux/usb.h>
17 #include <linux/mutex.h>
19 #include "../include/kthread.h"
21 /* our private defines. if this grows any larger, use your own .h file */
22 #define MAX_TRANSFER (PAGE_SIZE - 512)
23 /* MAX_TRANSFER is chosen so that the VM is not stressed by
24 allocations > PAGE_SIZE and the number of packets in a page
25 is an integer 512 is the largest possible packet on EHCI */
26 #define WRITES_IN_FLIGHT 8
27 /* arbitrarily chosen */
29 /* Define these values to match your devices */
30 #define USBCAN_VENDOR_ID 0xDEAD
31 #define USBCAN_PRODUCT_ID 0x1001
33 #define RESET_ADDR 0x0
36 * IO_RANGE is the io-memory range that gets reserved, please adjust according
37 * your hardware. Example: #define IO_RANGE 0x100 for i82527 chips or
38 * #define IO_RANGE 0x20 for sja1000 chips in basic CAN mode.
40 #define IO_RANGE 0x100
43 int usbcan_request_io(struct candevice_t *candev);
44 int usbcan_release_io(struct candevice_t *candev);
45 int usbcan_reset(struct candevice_t *candev);
46 int usbcan_init_hw_data(struct candevice_t *candev);
47 int usbcan_init_chip_data(struct candevice_t *candev, int chipnr);
48 int usbcan_init_obj_data(struct canchip_t *chip, int objnr);
49 void usbcan_write_register(unsigned data, unsigned long address);
50 unsigned usbcan_read_register(unsigned long address);
51 int usbcan_program_irq(struct candevice_t *candev);
52 int usbcan_register(struct hwspecops_t *hwspecops);
54 int usbcan_chip_config(struct canchip_t *chip);
55 int usbcan_extended_mask(struct canchip_t *chip, unsigned long code, unsigned long mask);
56 int usbcan_baud_rate(struct canchip_t *chip, int rate, int clock, int sjw,
57 int sampl_pt, int flags);
58 int usbcan_pre_read_config(struct canchip_t *chip, struct msgobj_t *obj);
59 int usbcan_pre_write_config(struct canchip_t *chip, struct msgobj_t *obj,
60 struct canmsg_t *msg);
61 int usbcan_send_msg(struct canchip_t *chip, struct msgobj_t *obj,
62 struct canmsg_t *msg);
63 int usbcan_fill_chipspecops(struct canchip_t *chip);
64 int usbcan_irq_handler(int irq, struct canchip_t *chip);
66 int usbcan_init(void);
67 void usbcan_exit(void);
69 void usbcan_read_kthread(kthread_t *kthread);
70 int usbcan_chip_queue_status(struct canchip_t *chip);
72 #ifdef CONFIG_OC_LINCAN_DETAILED_ERRORS
74 // static const char *sja1000_ecc_errc_str[]={
78 // "other type of error"
81 // static const char *sja1000_ecc_seg_str[]={
93 // "data length code",
99 // "active error flag",
101 // "tolerate dominant bits",
104 // "passive error flag",
105 // "error delimiter",
107 // "acknowledge slot",
109 // "acknowledge delimiter",
116 #endif /*CONFIG_OC_LINCAN_DETAILED_ERRORS*/
118 /* Structure to hold all of our device specific stuff */
120 struct usb_device *udev; /* the usb device for this device */
121 struct usb_interface *interface; /* the interface for this device */
122 struct semaphore limit_sem; /* limiting the number of writes in progress */
123 struct usb_anchor submitted; /* in case we need to retract our submissions */
124 unsigned char *bulk_in_buffer; /* the buffer to receive data */
125 unsigned char *ctl_in_buffer; /* the buffer to receive data */
126 size_t bulk_in_size; /* the size of the receive buffer */
127 size_t ctl_in_size; /* the size of the receive buffer */
128 u8 ctl_in_endpointAddr; /* the address of the bulk in endpoint */
129 u8 ctl_out_endpointAddr; /* the address of the bulk in endpoint */
130 u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
131 u8 bulk_out_endpointAddr; /* the address of the bulk out endpoint */
132 int errors; /* the last request tanked */
133 int open_count; /* count the number of openers */
134 spinlock_t err_lock; /* lock for errors */
135 struct mutex io_mutex; /* synchronize I/O with disconnect */
139 kthread_t rcvthread; /* usb receive kernel thread */
141 struct candevice_t *candev;
145 #define USBCAN_DATA_READ (1)
146 #define USBCAN_TERMINATE (2)
147 #define USBCAN_ERROR (3)
148 #define USBCAN_TX_PENDING (4)
150 #define USBCAN_VENDOR_BAUD_RATE_SET (1)
151 #define USBCAN_VENDOR_BAUD_RATE_STATUS (2)
152 #define USBCAN_VENDOR_SET_BTREGS (3)
153 #define USBCAN_VENDOR_CHECK_TX_STAT (4)
154 #define USBCAN_VENDOR_START_CHIP (5)
155 #define USBCAN_VENDOR_STOP_CHIP (6)
156 #define USBCAN_VENDOR_EXT_MASK_SET (7)
157 #define USBCAN_VENDOR_EXT_MASK_STATUS (8)