a78b42824d
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>
145 lines
3.2 KiB
C
145 lines
3.2 KiB
C
/*
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* Qualcomm Serial USB driver
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*
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* Copyright (c) 2008 QUALCOMM Incorporated.
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* Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de>
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* Copyright (c) 2009 Novell Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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*/
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#define DRIVER_AUTHOR "Qualcomm Inc"
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#define DRIVER_DESC "Qualcomm USB Serial driver"
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static int debug;
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static struct usb_device_id id_table[] = {
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{USB_DEVICE(0x05c6, 0x9211)}, /* Acer Gobi QDL device */
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{USB_DEVICE(0x05c6, 0x9212)}, /* Acer Gobi Modem Device */
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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static struct usb_driver qcdriver = {
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.name = "qcserial",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = id_table,
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.suspend = usb_serial_suspend,
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.resume = usb_serial_resume,
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.supports_autosuspend = true,
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};
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static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
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{
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int retval = -ENODEV;
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__u8 nintf;
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__u8 ifnum;
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dbg("%s", __func__);
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nintf = serial->dev->actconfig->desc.bNumInterfaces;
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dbg("Num Interfaces = %d", nintf);
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ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
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dbg("This Interface = %d", ifnum);
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switch (nintf) {
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case 1:
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/* QDL mode */
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if (serial->interface->num_altsetting == 2) {
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struct usb_host_interface *intf;
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intf = &serial->interface->altsetting[1];
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if (intf->desc.bNumEndpoints == 2) {
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if (usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
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usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
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dbg("QDL port found");
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retval = usb_set_interface(serial->dev, ifnum, 1);
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if (retval < 0) {
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dev_err(&serial->dev->dev,
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"Could not set interface, error %d\n",
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retval);
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retval = -ENODEV;
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}
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return retval;
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}
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}
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}
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break;
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case 4:
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/* Composite mode */
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if (ifnum == 2) {
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dbg("Modem port found");
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retval = usb_set_interface(serial->dev, ifnum, 0);
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if (retval < 0) {
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dev_err(&serial->dev->dev,
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"Could not set interface, error %d\n",
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retval);
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retval = -ENODEV;
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}
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return retval;
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}
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break;
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default:
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dev_err(&serial->dev->dev,
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"unknown number of interfaces: %d\n", nintf);
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return -ENODEV;
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}
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return retval;
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}
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static struct usb_serial_driver qcdevice = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "qcserial",
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},
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.description = "Qualcomm USB modem",
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.id_table = id_table,
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.usb_driver = &qcdriver,
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.num_ports = 1,
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.probe = qcprobe,
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};
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static int __init qcinit(void)
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{
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int retval;
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retval = usb_serial_register(&qcdevice);
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if (retval)
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return retval;
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retval = usb_register(&qcdriver);
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if (retval) {
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usb_serial_deregister(&qcdevice);
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return retval;
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}
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return 0;
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}
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static void __exit qcexit(void)
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{
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usb_deregister(&qcdriver);
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usb_serial_deregister(&qcdevice);
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}
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module_init(qcinit);
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module_exit(qcexit);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL v2");
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module_param(debug, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(debug, "Debug enabled or not");
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