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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114// SPDX-License-Identifier: GPL-2.0/* * USB Debug cable driver * * Copyright (C) 2006 Greg Kroah-Hartman <greg@kroah.com> */
#include <linux/gfp.h>#include <linux/kernel.h>#include <linux/tty.h>#include <linux/module.h>#include <linux/usb.h>#include <linux/usb/serial.h>
#define USB_DEBUG_MAX_PACKET_SIZE 8#define USB_DEBUG_BRK_SIZE 8static const char USB_DEBUG_BRK[USB_DEBUG_BRK_SIZE] = { 0x00, 0xff, 0x01, 0xfe, 0x00, 0xfe, 0x01, 0xff,};
static const struct usb_device_id id_table[] = { { USB_DEVICE(0x0525, 0x127a) }, { },};
static const struct usb_device_id dbc_id_table[] = { { USB_DEVICE(0x1d6b, 0x0010) }, { USB_DEVICE(0x1d6b, 0x0011) }, { },};
static const struct usb_device_id id_table_combined[] = { { USB_DEVICE(0x0525, 0x127a) }, { USB_DEVICE(0x1d6b, 0x0010) }, { USB_DEVICE(0x1d6b, 0x0011) }, { },};MODULE_DEVICE_TABLE(usb, id_table_combined);
/* This HW really does not support a serial break, so one will be * emulated when ever the break state is set to true. */static int usb_debug_break_ctl(struct tty_struct *tty, int break_state){ struct usb_serial_port *port = tty->driver_data; int ret;
if (!break_state) return 0;
ret = usb_serial_generic_write(tty, port, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE); if (ret < 0) return ret;
return 0;}
static void usb_debug_process_read_urb(struct urb *urb){ struct usb_serial_port *port = urb->context;
if (urb->actual_length == USB_DEBUG_BRK_SIZE && memcmp(urb->transfer_buffer, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE) == 0) { usb_serial_handle_break(port); return; }
usb_serial_generic_process_read_urb(urb);}
static void usb_debug_init_termios(struct tty_struct *tty){ tty->termios.c_lflag &= ~(ECHO | ECHONL);}
static struct usb_serial_driver debug_device = { .driver = { .name = "debug", }, .id_table = id_table, .num_ports = 1, .bulk_out_size = USB_DEBUG_MAX_PACKET_SIZE, .break_ctl = usb_debug_break_ctl, .init_termios = usb_debug_init_termios, .process_read_urb = usb_debug_process_read_urb,};
static struct usb_serial_driver dbc_device = { .driver = { .name = "xhci_dbc", }, .id_table = dbc_id_table, .num_ports = 1, .break_ctl = usb_debug_break_ctl, .init_termios = usb_debug_init_termios, .process_read_urb = usb_debug_process_read_urb,};
static struct usb_serial_driver * const serial_drivers[] = { &debug_device, &dbc_device, NULL};
module_usb_serial_driver(serial_drivers, id_table_combined);MODULE_DESCRIPTION("USB Debug cable driver");MODULE_LICENSE("GPL v2");