projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 958e8741 GKH |
2 | /* |
| 3 | * USB Debug cable driver | |
| 4 | * | |
| 5 | * Copyright (C) 2006 Greg Kroah-Hartman <greg@kroah.com> | |
| 958e8741 GKH |
6 | */ |
| 7 | ||
| 5a0e3ad6 | 8 | #include <linux/gfp.h> |
| 958e8741 | 9 | #include <linux/kernel.h> |
| 958e8741 GKH |
10 | #include <linux/tty.h> |
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/usb.h> | |
| 13 | #include <linux/usb/serial.h> | |
| 14 | ||
| 71be4f81 | 15 | #define USB_DEBUG_MAX_PACKET_SIZE 8 |
| 98fcb5f7 | 16 | #define USB_DEBUG_BRK_SIZE 8 |
| 4f37fa54 | 17 | static const char USB_DEBUG_BRK[USB_DEBUG_BRK_SIZE] = { |
| 98fcb5f7 JW |
18 | 0x00, |
| 19 | 0xff, | |
| 20 | 0x01, | |
| 21 | 0xfe, | |
| 22 | 0x00, | |
| 23 | 0xfe, | |
| 24 | 0x01, | |
| 25 | 0xff, | |
| 26 | }; | |
| 71be4f81 | 27 | |
| 7d40d7e8 | 28 | static const struct usb_device_id id_table[] = { |
| 958e8741 GKH |
29 | { USB_DEVICE(0x0525, 0x127a) }, |
| 30 | { }, | |
| 31 | }; | |
| 57fb4727 LB |
32 | |
| 33 | static const struct usb_device_id dbc_id_table[] = { | |
| 34 | { USB_DEVICE(0x1d6b, 0x0004) }, | |
| 35 | { }, | |
| 36 | }; | |
| 37 | ||
| 38 | static const struct usb_device_id id_table_combined[] = { | |
| 39 | { USB_DEVICE(0x0525, 0x127a) }, | |
| 40 | { USB_DEVICE(0x1d6b, 0x0004) }, | |
| 41 | { }, | |
| 42 | }; | |
| 43 | MODULE_DEVICE_TABLE(usb, id_table_combined); | |
| 958e8741 | 44 | |
| 98fcb5f7 JW |
45 | /* This HW really does not support a serial break, so one will be |
| 46 | * emulated when ever the break state is set to true. | |
| 47 | */ | |
| 48 | static void usb_debug_break_ctl(struct tty_struct *tty, int break_state) | |
| 49 | { | |
| 50 | struct usb_serial_port *port = tty->driver_data; | |
| 51 | if (!break_state) | |
| 52 | return; | |
| 53 | usb_serial_generic_write(tty, port, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE); | |
| 54 | } | |
| 55 | ||
| ac3695fb | 56 | static void usb_debug_process_read_urb(struct urb *urb) |
| 98fcb5f7 JW |
57 | { |
| 58 | struct usb_serial_port *port = urb->context; | |
| 59 | ||
| 60 | if (urb->actual_length == USB_DEBUG_BRK_SIZE && | |
| e63aa508 JH |
61 | memcmp(urb->transfer_buffer, USB_DEBUG_BRK, |
| 62 | USB_DEBUG_BRK_SIZE) == 0) { | |
| 98fcb5f7 | 63 | usb_serial_handle_break(port); |
| 98fcb5f7 JW |
64 | return; |
| 65 | } | |
| 66 | ||
| ac3695fb | 67 | usb_serial_generic_process_read_urb(urb); |
| 98fcb5f7 JW |
68 | } |
| 69 | ||
| 958e8741 GKH |
70 | static struct usb_serial_driver debug_device = { |
| 71 | .driver = { | |
| 72 | .owner = THIS_MODULE, | |
| 73 | .name = "debug", | |
| 74 | }, | |
| 75 | .id_table = id_table, | |
| 958e8741 | 76 | .num_ports = 1, |
| 7288d755 | 77 | .bulk_out_size = USB_DEBUG_MAX_PACKET_SIZE, |
| 98fcb5f7 | 78 | .break_ctl = usb_debug_break_ctl, |
| ac3695fb | 79 | .process_read_urb = usb_debug_process_read_urb, |
| 958e8741 GKH |
80 | }; |
| 81 | ||
| 57fb4727 LB |
82 | static struct usb_serial_driver dbc_device = { |
| 83 | .driver = { | |
| 84 | .owner = THIS_MODULE, | |
| 85 | .name = "xhci_dbc", | |
| 86 | }, | |
| 87 | .id_table = dbc_id_table, | |
| 88 | .num_ports = 1, | |
| 89 | .break_ctl = usb_debug_break_ctl, | |
| 90 | .process_read_urb = usb_debug_process_read_urb, | |
| 91 | }; | |
| 92 | ||
| 29618e9f | 93 | static struct usb_serial_driver * const serial_drivers[] = { |
| 57fb4727 | 94 | &debug_device, &dbc_device, NULL |
| 29618e9f AS |
95 | }; |
| 96 | ||
| 57fb4727 | 97 | module_usb_serial_driver(serial_drivers, id_table_combined); |
| 958e8741 | 98 | MODULE_LICENSE("GPL"); |