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100 lines
2.2 KiB
100 lines
2.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* USB Debug cable driver |
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* |
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* Copyright (C) 2006 Greg Kroah-Hartman <[email protected]> |
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*/ |
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#include <linux/gfp.h> |
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#include <linux/kernel.h> |
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#include <linux/tty.h> |
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#include <linux/module.h> |
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#include <linux/usb.h> |
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#include <linux/usb/serial.h> |
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#define USB_DEBUG_MAX_PACKET_SIZE 8 |
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#define USB_DEBUG_BRK_SIZE 8 |
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static const char USB_DEBUG_BRK[USB_DEBUG_BRK_SIZE] = { |
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0x00, |
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0xff, |
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0x01, |
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0xfe, |
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0x00, |
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0xfe, |
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0x01, |
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0xff, |
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}; |
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static const struct usb_device_id id_table[] = { |
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{ USB_DEVICE(0x0525, 0x127a) }, |
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{ }, |
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}; |
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static const struct usb_device_id dbc_id_table[] = { |
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{ USB_DEVICE(0x1d6b, 0x0010) }, |
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{ USB_DEVICE(0x1d6b, 0x0011) }, |
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{ }, |
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}; |
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static const struct usb_device_id id_table_combined[] = { |
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{ USB_DEVICE(0x0525, 0x127a) }, |
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{ USB_DEVICE(0x1d6b, 0x0010) }, |
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{ USB_DEVICE(0x1d6b, 0x0011) }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(usb, id_table_combined); |
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/* This HW really does not support a serial break, so one will be |
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* emulated when ever the break state is set to true. |
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*/ |
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static void usb_debug_break_ctl(struct tty_struct *tty, int break_state) |
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{ |
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struct usb_serial_port *port = tty->driver_data; |
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if (!break_state) |
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return; |
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usb_serial_generic_write(tty, port, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE); |
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} |
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static void usb_debug_process_read_urb(struct urb *urb) |
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{ |
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struct usb_serial_port *port = urb->context; |
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if (urb->actual_length == USB_DEBUG_BRK_SIZE && |
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memcmp(urb->transfer_buffer, USB_DEBUG_BRK, |
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USB_DEBUG_BRK_SIZE) == 0) { |
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usb_serial_handle_break(port); |
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return; |
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} |
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usb_serial_generic_process_read_urb(urb); |
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} |
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static struct usb_serial_driver debug_device = { |
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.driver = { |
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.owner = THIS_MODULE, |
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.name = "debug", |
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}, |
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.id_table = id_table, |
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.num_ports = 1, |
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.bulk_out_size = USB_DEBUG_MAX_PACKET_SIZE, |
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.break_ctl = usb_debug_break_ctl, |
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.process_read_urb = usb_debug_process_read_urb, |
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}; |
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static struct usb_serial_driver dbc_device = { |
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.driver = { |
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.owner = THIS_MODULE, |
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.name = "xhci_dbc", |
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}, |
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.id_table = dbc_id_table, |
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.num_ports = 1, |
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.break_ctl = usb_debug_break_ctl, |
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.process_read_urb = usb_debug_process_read_urb, |
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}; |
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static struct usb_serial_driver * const serial_drivers[] = { |
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&debug_device, &dbc_device, NULL |
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}; |
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module_usb_serial_driver(serial_drivers, id_table_combined); |
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MODULE_LICENSE("GPL v2");
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