From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/usb/serial/usb_debug.c | 100 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 drivers/usb/serial/usb_debug.c (limited to 'drivers/usb/serial/usb_debug.c') diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial/usb_debug.c new file mode 100644 index 000000000..aaf4813e4 --- /dev/null +++ b/drivers/usb/serial/usb_debug.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * USB Debug cable driver + * + * Copyright (C) 2006 Greg Kroah-Hartman + */ + +#include +#include +#include +#include +#include +#include + +#define USB_DEBUG_MAX_PACKET_SIZE 8 +#define USB_DEBUG_BRK_SIZE 8 +static 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 void usb_debug_break_ctl(struct tty_struct *tty, int break_state) +{ + struct usb_serial_port *port = tty->driver_data; + if (!break_state) + return; + usb_serial_generic_write(tty, port, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE); +} + +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 struct usb_serial_driver debug_device = { + .driver = { + .owner = THIS_MODULE, + .name = "debug", + }, + .id_table = id_table, + .num_ports = 1, + .bulk_out_size = USB_DEBUG_MAX_PACKET_SIZE, + .break_ctl = usb_debug_break_ctl, + .process_read_urb = usb_debug_process_read_urb, +}; + +static struct usb_serial_driver dbc_device = { + .driver = { + .owner = THIS_MODULE, + .name = "xhci_dbc", + }, + .id_table = dbc_id_table, + .num_ports = 1, + .break_ctl = usb_debug_break_ctl, + .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_LICENSE("GPL v2"); -- cgit v1.2.3