diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/usb/serial/usb_debug.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/usb/serial/usb_debug.c')
-rw-r--r-- | kernel/drivers/usb/serial/usb_debug.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/kernel/drivers/usb/serial/usb_debug.c b/kernel/drivers/usb/serial/usb_debug.c new file mode 100644 index 000000000..ca2fa5bbe --- /dev/null +++ b/kernel/drivers/usb/serial/usb_debug.c @@ -0,0 +1,79 @@ +/* + * USB Debug cable driver + * + * Copyright (C) 2006 Greg Kroah-Hartman <greg@kroah.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version + * 2 as published by the Free Software Foundation. + */ + +#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 8 +static 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) }, + { }, +}; +MODULE_DEVICE_TABLE(usb, id_table); + +/* 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 * const serial_drivers[] = { + &debug_device, NULL +}; + +module_usb_serial_driver(serial_drivers, id_table); +MODULE_LICENSE("GPL"); |