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USB: serial: add qualcomm wireless modem driver

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Driver originally written by Qualcomm, but rewritten by me due to the
totally different coding style.  Cleaned up the probe logic to make a
bit more sense, this is one wierd device.  They could have prevented all
of this by just writing sane firmware for the modem.

Cc: Tamm Liu <tamml@qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2009-02-17 22:39:56 -08:00
parent 3d940b7d27
commit a78b42824d
3 changed files with 155 additions and 0 deletions
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9
drivers/usb/serial/Kconfig
View file

@ -472,6 +472,15 @@ config USB_SERIAL_OTI6858
To compile this driver as a module, choose M here: the
module will be called oti6858.
config USB_SERIAL_QUALCOMM
tristate "USB Qualcomm Serial modem"
help
Say Y here if you have a Qualcomm USB modem device. These are
usually wireless cellular modems.
To compile this driver as a module, choose M here: the
module will be called qcserial.
config USB_SERIAL_SPCP8X5
tristate "USB SPCP8x5 USB To Serial Driver"
help

1
drivers/usb/serial/Makefile
View file

@ -45,6 +45,7 @@ obj-$(CONFIG_USB_SERIAL_OPTICON) += opticon.o
obj-$(CONFIG_USB_SERIAL_OPTION) += option.o
obj-$(CONFIG_USB_SERIAL_OTI6858) += oti6858.o
obj-$(CONFIG_USB_SERIAL_PL2303) += pl2303.o
obj-$(CONFIG_USB_SERIAL_QUALCOMM) += qcserial.o
obj-$(CONFIG_USB_SERIAL_SAFE) += safe_serial.o
obj-$(CONFIG_USB_SERIAL_SIEMENS_MPI) += siemens_mpi.o
obj-$(CONFIG_USB_SERIAL_SIERRAWIRELESS) += sierra.o

145
drivers/usb/serial/qcserial.c Normal file
View file

@ -0,0 +1,145 @@
/*
* Qualcomm Serial USB driver
*
* Copyright (c) 2008 QUALCOMM Incorporated.
* Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de>
* Copyright (c) 2009 Novell Inc.
*
* 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/tty.h>
#include <linux/tty_flip.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#define DRIVER_AUTHOR "Qualcomm Inc"
#define DRIVER_DESC "Qualcomm USB Serial driver"
static int debug;
static struct usb_device_id id_table[] = {
{USB_DEVICE(0x05c6, 0x9211)}, /* Acer Gobi QDL device */
{USB_DEVICE(0x05c6, 0x9212)}, /* Acer Gobi Modem Device */
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, id_table);
static struct usb_driver qcdriver = {
.name = "qcserial",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table,
.suspend = usb_serial_suspend,
.resume = usb_serial_resume,
.supports_autosuspend = true,
};
static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
{
int retval = -ENODEV;
__u8 nintf;
__u8 ifnum;
dbg("%s", __func__);
nintf = serial->dev->actconfig->desc.bNumInterfaces;
dbg("Num Interfaces = %d", nintf);
ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
dbg("This Interface = %d", ifnum);
switch (nintf) {
case 1:
/* QDL mode */
if (serial->interface->num_altsetting == 2) {
struct usb_host_interface *intf;
intf = &serial->interface->altsetting[1];
if (intf->desc.bNumEndpoints == 2) {
if (usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
dbg("QDL port found");
retval = usb_set_interface(serial->dev, ifnum, 1);
if (retval < 0) {
dev_err(&serial->dev->dev,
"Could not set interface, error %d\n",
retval);
retval = -ENODEV;
}
return retval;
}
}
}
break;
case 4:
/* Composite mode */
if (ifnum == 2) {
dbg("Modem port found");
retval = usb_set_interface(serial->dev, ifnum, 0);
if (retval < 0) {
dev_err(&serial->dev->dev,
"Could not set interface, error %d\n",
retval);
retval = -ENODEV;
}
return retval;
}
break;
default:
dev_err(&serial->dev->dev,
"unknown number of interfaces: %d\n", nintf);
return -ENODEV;
}
return retval;
}
static struct usb_serial_driver qcdevice = {
.driver = {
.owner = THIS_MODULE,
.name = "qcserial",
},
.description = "Qualcomm USB modem",
.id_table = id_table,
.usb_driver = &qcdriver,
.num_ports = 1,
.probe = qcprobe,
};
static int __init qcinit(void)
{
int retval;
retval = usb_serial_register(&qcdevice);
if (retval)
return retval;
retval = usb_register(&qcdriver);
if (retval) {
usb_serial_deregister(&qcdevice);
return retval;
}
return 0;
}
static void __exit qcexit(void)
{
usb_deregister(&qcdriver);
usb_serial_deregister(&qcdevice);
}
module_init(qcinit);
module_exit(qcexit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL v2");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");