projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 958e8741 GKH |
1 | /* |
| 2 | * USB Debug cable driver | |
| 3 | * | |
| 4 | * Copyright (C) 2006 Greg Kroah-Hartman <greg@kroah.com> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License version | |
| 8 | * 2 as published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 5a0e3ad6 | 11 | #include <linux/gfp.h> |
| 958e8741 | 12 | #include <linux/kernel.h> |
| 958e8741 GKH |
13 | #include <linux/tty.h> |
| 14 | #include <linux/module.h> | |
| 15 | #include <linux/usb.h> | |
| 16 | #include <linux/usb/serial.h> | |
| 17 | ||
| 71be4f81 | 18 | #define USB_DEBUG_MAX_PACKET_SIZE 8 |
| 98fcb5f7 JW |
19 | #define USB_DEBUG_BRK_SIZE 8 |
| 20 | static char USB_DEBUG_BRK[USB_DEBUG_BRK_SIZE] = { | |
| 21 | 0x00, | |
| 22 | 0xff, | |
| 23 | 0x01, | |
| 24 | 0xfe, | |
| 25 | 0x00, | |
| 26 | 0xfe, | |
| 27 | 0x01, | |
| 28 | 0xff, | |
| 29 | }; | |
| 71be4f81 | 30 | |
| 7d40d7e8 | 31 | static const struct usb_device_id id_table[] = { |
| 958e8741 GKH |
32 | { USB_DEVICE(0x0525, 0x127a) }, |
| 33 | { }, | |
| 34 | }; | |
| 35 | MODULE_DEVICE_TABLE(usb, id_table); | |
| 36 | ||
| 98fcb5f7 JW |
37 | /* This HW really does not support a serial break, so one will be |
| 38 | * emulated when ever the break state is set to true. | |
| 39 | */ | |
| 40 | static void usb_debug_break_ctl(struct tty_struct *tty, int break_state) | |
| 41 | { | |
| 42 | struct usb_serial_port *port = tty->driver_data; | |
| 43 | if (!break_state) | |
| 44 | return; | |
| 45 | usb_serial_generic_write(tty, port, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE); | |
| 46 | } | |
| 47 | ||
| ac3695fb | 48 | static void usb_debug_process_read_urb(struct urb *urb) |
| 98fcb5f7 JW |
49 | { |
| 50 | struct usb_serial_port *port = urb->context; | |
| 51 | ||
| 52 | if (urb->actual_length == USB_DEBUG_BRK_SIZE && | |
| e63aa508 JH |
53 | memcmp(urb->transfer_buffer, USB_DEBUG_BRK, |
| 54 | USB_DEBUG_BRK_SIZE) == 0) { | |
| 98fcb5f7 | 55 | usb_serial_handle_break(port); |
| 98fcb5f7 JW |
56 | return; |
| 57 | } | |
| 58 | ||
| ac3695fb | 59 | usb_serial_generic_process_read_urb(urb); |
| 98fcb5f7 JW |
60 | } |
| 61 | ||
| 958e8741 GKH |
62 | static struct usb_serial_driver debug_device = { |
| 63 | .driver = { | |
| 64 | .owner = THIS_MODULE, | |
| 65 | .name = "debug", | |
| 66 | }, | |
| 67 | .id_table = id_table, | |
| 958e8741 | 68 | .num_ports = 1, |
| 7288d755 | 69 | .bulk_out_size = USB_DEBUG_MAX_PACKET_SIZE, |
| 98fcb5f7 | 70 | .break_ctl = usb_debug_break_ctl, |
| ac3695fb | 71 | .process_read_urb = usb_debug_process_read_urb, |
| 958e8741 GKH |
72 | }; |
| 73 | ||
| 29618e9f AS |
74 | static struct usb_serial_driver * const serial_drivers[] = { |
| 75 | &debug_device, NULL | |
| 76 | }; | |
| 77 | ||
| 68e24113 | 78 | module_usb_serial_driver(serial_drivers, id_table); |
| 958e8741 | 79 | MODULE_LICENSE("GPL"); |