// SPDX-License-Identifier: GPL-2.0
/*
 * Qualcomm Serial USB driver
 *
 *      Copyright (c) 2008 QUALCOMM Incorporated.
 *      Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de>
 *      Copyright (c) 2009 Novell Inc.
 */

#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/slab.h>
#include "usb-wwan.h"

#define DRIVER_AUTHOR "Qualcomm Inc"
#define DRIVER_DESC "Qualcomm USB Serial driver"

#define QUECTEL_EC20_PID        0x9215

/* standard device layouts supported by this driver */
enum qcserial_layouts {
        QCSERIAL_G2K = 0,       /* Gobi 2000 */
        QCSERIAL_G1K = 1,       /* Gobi 1000 */
        QCSERIAL_SWI = 2,       /* Sierra Wireless */
        QCSERIAL_HWI = 3,       /* Huawei */
};

#define DEVICE_G1K(v, p) \
        USB_DEVICE(v, p), .driver_info = QCSERIAL_G1K
#define DEVICE_SWI(v, p) \
        USB_DEVICE(v, p), .driver_info = QCSERIAL_SWI
#define DEVICE_HWI(v, p) \
        USB_DEVICE(v, p), .driver_info = QCSERIAL_HWI

static const struct usb_device_id id_table[] = {
        /* Gobi 1000 devices */
        {DEVICE_G1K(0x05c6, 0x9211)},   /* Acer Gobi QDL device */
        {DEVICE_G1K(0x05c6, 0x9212)},   /* Acer Gobi Modem Device */
        {DEVICE_G1K(0x03f0, 0x1f1d)},   /* HP un2400 Gobi Modem Device */
        {DEVICE_G1K(0x03f0, 0x201d)},   /* HP un2400 Gobi QDL Device */
        {DEVICE_G1K(0x04da, 0x250d)},   /* Panasonic Gobi Modem device */
        {DEVICE_G1K(0x04da, 0x250c)},   /* Panasonic Gobi QDL device */
        {DEVICE_G1K(0x413c, 0x8172)},   /* Dell Gobi Modem device */
        {DEVICE_G1K(0x413c, 0x8171)},   /* Dell Gobi QDL device */
        {DEVICE_G1K(0x1410, 0xa001)},   /* Novatel/Verizon USB-1000 */
        {DEVICE_G1K(0x1410, 0xa002)},   /* Novatel Gobi Modem device */
        {DEVICE_G1K(0x1410, 0xa003)},   /* Novatel Gobi Modem device */
        {DEVICE_G1K(0x1410, 0xa004)},   /* Novatel Gobi Modem device */
        {DEVICE_G1K(0x1410, 0xa005)},   /* Novatel Gobi Modem device */
        {DEVICE_G1K(0x1410, 0xa006)},   /* Novatel Gobi Modem device */
        {DEVICE_G1K(0x1410, 0xa007)},   /* Novatel Gobi Modem device */
        {DEVICE_G1K(0x1410, 0xa008)},   /* Novatel Gobi QDL device */
        {DEVICE_G1K(0x0b05, 0x1776)},   /* Asus Gobi Modem device */
        {DEVICE_G1K(0x0b05, 0x1774)},   /* Asus Gobi QDL device */
        {DEVICE_G1K(0x19d2, 0xfff3)},   /* ONDA Gobi Modem device */
        {DEVICE_G1K(0x19d2, 0xfff2)},   /* ONDA Gobi QDL device */
        {DEVICE_G1K(0x1557, 0x0a80)},   /* OQO Gobi QDL device */
        {DEVICE_G1K(0x05c6, 0x9001)},   /* Generic Gobi Modem device */
        {DEVICE_G1K(0x05c6, 0x9002)},   /* Generic Gobi Modem device */
        {DEVICE_G1K(0x05c6, 0x9202)},   /* Generic Gobi Modem device */
        {DEVICE_G1K(0x05c6, 0x9203)},   /* Generic Gobi Modem device */
        {DEVICE_G1K(0x05c6, 0x9222)},   /* Generic Gobi Modem device */
        {DEVICE_G1K(0x05c6, 0x9008)},   /* Generic Gobi QDL device */
        {DEVICE_G1K(0x05c6, 0x9009)},   /* Generic Gobi Modem device */
        {DEVICE_G1K(0x05c6, 0x9201)},   /* Generic Gobi QDL device */
        {DEVICE_G1K(0x05c6, 0x9221)},   /* Generic Gobi QDL device */
        {DEVICE_G1K(0x05c6, 0x9231)},   /* Generic Gobi QDL device */
        {DEVICE_G1K(0x1f45, 0x0001)},   /* Unknown Gobi QDL device */
        {DEVICE_G1K(0x1bc7, 0x900e)},   /* Telit Gobi QDL device */

        /* Gobi 2000 devices */
        {USB_DEVICE(0x1410, 0xa010)},   /* Novatel Gobi 2000 QDL device */
        {USB_DEVICE(0x1410, 0xa011)},   /* Novatel Gobi 2000 QDL device */
        {USB_DEVICE(0x1410, 0xa012)},   /* Novatel Gobi 2000 QDL device */
        {USB_DEVICE(0x1410, 0xa013)},   /* Novatel Gobi 2000 QDL device */
        {USB_DEVICE(0x1410, 0xa014)},   /* Novatel Gobi 2000 QDL device */
        {USB_DEVICE(0x413c, 0x8185)},   /* Dell Gobi 2000 QDL device (N0218, VU936) */
        {USB_DEVICE(0x413c, 0x8186)},   /* Dell Gobi 2000 Modem device (N0218, VU936) */
        {USB_DEVICE(0x05c6, 0x9208)},   /* Generic Gobi 2000 QDL device */
        {USB_DEVICE(0x05c6, 0x920b)},   /* Generic Gobi 2000 Modem device */
        {USB_DEVICE(0x05c6, 0x9224)},   /* Sony Gobi 2000 QDL device (N0279, VU730) */
        {USB_DEVICE(0x05c6, 0x9225)},   /* Sony Gobi 2000 Modem device (N0279, VU730) */
        {USB_DEVICE(0x05c6, 0x9244)},   /* Samsung Gobi 2000 QDL device (VL176) */
        {USB_DEVICE(0x05c6, 0x9245)},   /* Samsung Gobi 2000 Modem device (VL176) */
        {USB_DEVICE(0x03f0, 0x241d)},   /* HP Gobi 2000 QDL device (VP412) */
        {USB_DEVICE(0x03f0, 0x251d)},   /* HP Gobi 2000 Modem device (VP412) */
        {USB_DEVICE(0x05c6, 0x9214)},   /* Acer Gobi 2000 QDL device (VP413) */
        {USB_DEVICE(0x05c6, 0x9215)},   /* Acer Gobi 2000 Modem device (VP413) */
        {USB_DEVICE(0x05c6, 0x9264)},   /* Asus Gobi 2000 QDL device (VR305) */
        {USB_DEVICE(0x05c6, 0x9265)},   /* Asus Gobi 2000 Modem device (VR305) */
        {USB_DEVICE(0x05c6, 0x9234)},   /* Top Global Gobi 2000 QDL device (VR306) */
        {USB_DEVICE(0x05c6, 0x9235)},   /* Top Global Gobi 2000 Modem device (VR306) */
        {USB_DEVICE(0x05c6, 0x9274)},   /* iRex Technologies Gobi 2000 QDL device (VR307) */
        {USB_DEVICE(0x05c6, 0x9275)},   /* iRex Technologies Gobi 2000 Modem device (VR307) */
        {USB_DEVICE(0x1199, 0x9000)},   /* Sierra Wireless Gobi 2000 QDL device (VT773) */
        {USB_DEVICE(0x1199, 0x9001)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
        {USB_DEVICE(0x1199, 0x9002)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
        {USB_DEVICE(0x1199, 0x9003)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
        {USB_DEVICE(0x1199, 0x9004)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
        {USB_DEVICE(0x1199, 0x9005)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
        {USB_DEVICE(0x1199, 0x9006)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
        {USB_DEVICE(0x1199, 0x9007)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
        {USB_DEVICE(0x1199, 0x9008)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
        {USB_DEVICE(0x1199, 0x9009)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
        {USB_DEVICE(0x1199, 0x900a)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
        {USB_DEVICE(0x1199, 0x9011)},   /* Sierra Wireless Gobi 2000 Modem device (MC8305) */
        {USB_DEVICE(0x16d8, 0x8001)},   /* CMDTech Gobi 2000 QDL device (VU922) */
        {USB_DEVICE(0x16d8, 0x8002)},   /* CMDTech Gobi 2000 Modem device (VU922) */
        {USB_DEVICE(0x05c6, 0x9204)},   /* Gobi 2000 QDL device */
        {USB_DEVICE(0x05c6, 0x9205)},   /* Gobi 2000 Modem device */

        /* Gobi 3000 devices */
        {USB_DEVICE(0x03f0, 0x371d)},   /* HP un2430 Gobi 3000 QDL */
        {USB_DEVICE(0x05c6, 0x920c)},   /* Gobi 3000 QDL */
        {USB_DEVICE(0x05c6, 0x920d)},   /* Gobi 3000 Composite */
        {USB_DEVICE(0x1410, 0xa020)},   /* Novatel Gobi 3000 QDL */
        {USB_DEVICE(0x1410, 0xa021)},   /* Novatel Gobi 3000 Composite */
        {USB_DEVICE(0x413c, 0x8193)},   /* Dell Gobi 3000 QDL */
        {USB_DEVICE(0x413c, 0x8194)},   /* Dell Gobi 3000 Composite */
        {USB_DEVICE(0x413c, 0x81a6)},   /* Dell DW5570 QDL (MC8805) */
        {USB_DEVICE(0x1199, 0x68a4)},   /* Sierra Wireless QDL */
        {USB_DEVICE(0x1199, 0x68a5)},   /* Sierra Wireless Modem */
        {USB_DEVICE(0x1199, 0x68a8)},   /* Sierra Wireless QDL */
        {USB_DEVICE(0x1199, 0x68a9)},   /* Sierra Wireless Modem */
        {USB_DEVICE(0x1199, 0x9010)},   /* Sierra Wireless Gobi 3000 QDL */
        {USB_DEVICE(0x1199, 0x9012)},   /* Sierra Wireless Gobi 3000 QDL */
        {USB_DEVICE(0x1199, 0x9013)},   /* Sierra Wireless Gobi 3000 Modem device (MC8355) */
        {USB_DEVICE(0x1199, 0x9014)},   /* Sierra Wireless Gobi 3000 QDL */
        {USB_DEVICE(0x1199, 0x9015)},   /* Sierra Wireless Gobi 3000 Modem device */
        {USB_DEVICE(0x1199, 0x9018)},   /* Sierra Wireless Gobi 3000 QDL */
        {USB_DEVICE(0x1199, 0x9019)},   /* Sierra Wireless Gobi 3000 Modem device */
        {USB_DEVICE(0x1199, 0x901b)},   /* Sierra Wireless MC7770 */
        {USB_DEVICE(0x12D1, 0x14F0)},   /* Sony Gobi 3000 QDL */
        {USB_DEVICE(0x12D1, 0x14F1)},   /* Sony Gobi 3000 Composite */
        {USB_DEVICE(0x0AF0, 0x8120)},   /* Option GTM681W */

        /* non-Gobi Sierra Wireless devices */
        {DEVICE_SWI(0x03f0, 0x4e1d)},   /* HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module */
        {DEVICE_SWI(0x0f3d, 0x68a2)},   /* Sierra Wireless MC7700 */
        {DEVICE_SWI(0x114f, 0x68a2)},   /* Sierra Wireless MC7750 */
        {DEVICE_SWI(0x1199, 0x68a2)},   /* Sierra Wireless MC7710 */
        {DEVICE_SWI(0x1199, 0x68c0)},   /* Sierra Wireless MC7304/MC7354 */
        {DEVICE_SWI(0x1199, 0x901c)},   /* Sierra Wireless EM7700 */
        {DEVICE_SWI(0x1199, 0x901e)},   /* Sierra Wireless EM7355 QDL */
        {DEVICE_SWI(0x1199, 0x901f)},   /* Sierra Wireless EM7355 */
        {DEVICE_SWI(0x1199, 0x9040)},   /* Sierra Wireless Modem */
        {DEVICE_SWI(0x1199, 0x9041)},   /* Sierra Wireless MC7305/MC7355 */
        {DEVICE_SWI(0x1199, 0x9051)},   /* Netgear AirCard 340U */
        {DEVICE_SWI(0x1199, 0x9053)},   /* Sierra Wireless Modem */
        {DEVICE_SWI(0x1199, 0x9054)},   /* Sierra Wireless Modem */
        {DEVICE_SWI(0x1199, 0x9055)},   /* Netgear AirCard 341U */
        {DEVICE_SWI(0x1199, 0x9056)},   /* Sierra Wireless Modem */
        {DEVICE_SWI(0x1199, 0x9060)},   /* Sierra Wireless Modem */
        {DEVICE_SWI(0x1199, 0x9061)},   /* Sierra Wireless Modem */
        {DEVICE_SWI(0x1199, 0x9062)},   /* Sierra Wireless EM7305 QDL */
        {DEVICE_SWI(0x1199, 0x9063)},   /* Sierra Wireless EM7305 */
        {DEVICE_SWI(0x1199, 0x9070)},   /* Sierra Wireless MC74xx */
        {DEVICE_SWI(0x1199, 0x9071)},   /* Sierra Wireless MC74xx */
        {DEVICE_SWI(0x1199, 0x9078)},   /* Sierra Wireless EM74xx */
        {DEVICE_SWI(0x1199, 0x9079)},   /* Sierra Wireless EM74xx */
        {DEVICE_SWI(0x1199, 0x907a)},   /* Sierra Wireless EM74xx QDL */
        {DEVICE_SWI(0x1199, 0x907b)},   /* Sierra Wireless EM74xx */
        {DEVICE_SWI(0x1199, 0x9090)},   /* Sierra Wireless EM7565 QDL */
        {DEVICE_SWI(0x1199, 0x9091)},   /* Sierra Wireless EM7565 */
        {DEVICE_SWI(0x1199, 0x90d2)},   /* Sierra Wireless EM9191 QDL */
        {DEVICE_SWI(0x1199, 0x90e4)},   /* Sierra Wireless EM86xx QDL*/
        {DEVICE_SWI(0x1199, 0x90e5)},   /* Sierra Wireless EM86xx */
        {DEVICE_SWI(0x1199, 0xc080)},   /* Sierra Wireless EM7590 QDL */
        {DEVICE_SWI(0x1199, 0xc081)},   /* Sierra Wireless EM7590 */
        {DEVICE_SWI(0x413c, 0x81a2)},   /* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
        {DEVICE_SWI(0x413c, 0x81a3)},   /* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
        {DEVICE_SWI(0x413c, 0x81a4)},   /* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */
        {DEVICE_SWI(0x413c, 0x81a8)},   /* Dell Wireless 5808 Gobi(TM) 4G LTE Mobile Broadband Card */
        {DEVICE_SWI(0x413c, 0x81a9)},   /* Dell Wireless 5808e Gobi(TM) 4G LTE Mobile Broadband Card */
        {DEVICE_SWI(0x413c, 0x81b1)},   /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card */
        {DEVICE_SWI(0x413c, 0x81b3)},   /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card (rev3) */
        {DEVICE_SWI(0x413c, 0x81b5)},   /* Dell Wireless 5811e QDL */
        {DEVICE_SWI(0x413c, 0x81b6)},   /* Dell Wireless 5811e QDL */
        {DEVICE_SWI(0x413c, 0x81c2)},   /* Dell Wireless 5811e */
        {DEVICE_SWI(0x413c, 0x81cb)},   /* Dell Wireless 5816e QDL */
        {DEVICE_SWI(0x413c, 0x81cc)},   /* Dell Wireless 5816e */
        {DEVICE_SWI(0x413c, 0x81cf)},   /* Dell Wireless 5819 */
        {DEVICE_SWI(0x413c, 0x81d0)},   /* Dell Wireless 5819 */
        {DEVICE_SWI(0x413c, 0x81d1)},   /* Dell Wireless 5818 */
        {DEVICE_SWI(0x413c, 0x81d2)},   /* Dell Wireless 5818 */
        {DEVICE_SWI(0x413c, 0x8217)},   /* Dell Wireless DW5826e */
        {DEVICE_SWI(0x413c, 0x8218)},   /* Dell Wireless DW5826e QDL */

        /* Huawei devices */
        {DEVICE_HWI(0x03f0, 0x581d)},   /* HP lt4112 LTE/HSPA+ Gobi 4G Modem (Huawei me906e) */

        { }                             /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, id_table);

static int handle_quectel_ec20(struct device *dev, int ifnum)
{
        int altsetting = 0;

        /*
         * Quectel EC20 Mini PCIe LTE module layout:
         * 0: DM/DIAG (use libqcdm from ModemManager for communication)
         * 1: NMEA
         * 2: AT-capable modem port
         * 3: Modem interface
         * 4: NDIS
         */
        switch (ifnum) {
        case 0:
                dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
                break;
        case 1:
                dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
                break;
        case 2:
        case 3:
                dev_dbg(dev, "Quectel EC20 Modem port found\n");
                break;
        case 4:
                /* Don't claim the QMI/net interface */
                altsetting = -1;
                break;
        }

        return altsetting;
}

static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
{
        struct usb_host_interface *intf = serial->interface->cur_altsetting;
        struct device *dev = &serial->dev->dev;
        int retval = -ENODEV;
        __u8 nintf;
        __u8 ifnum;
        int altsetting = -1;
        bool sendsetup = false;

        /* we only support vendor specific functions */
        if (intf->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
                goto done;

        nintf = serial->dev->actconfig->desc.bNumInterfaces;
        dev_dbg(dev, "Num Interfaces = %d\n", nintf);
        ifnum = intf->desc.bInterfaceNumber;
        dev_dbg(dev, "This Interface = %d\n", ifnum);

        if (nintf == 1) {
                /* QDL mode */
                /* Gobi 2000 has a single altsetting, older ones have two */
                if (serial->interface->num_altsetting == 2)
                        intf = usb_altnum_to_altsetting(serial->interface, 1);
                else if (serial->interface->num_altsetting > 2)
                        goto done;

                if (intf && intf->desc.bNumEndpoints == 2 &&
                    usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
                    usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
                        dev_dbg(dev, "QDL port found\n");

                        if (serial->interface->num_altsetting == 1)
                                retval = 0; /* Success */
                        else
                                altsetting = 1;
                }
                goto done;

        }

        /* default to enabling interface */
        altsetting = 0;

        /*
         * Composite mode; don't bind to the QMI/net interface as that
         * gets handled by other drivers.
         */

        switch (id->driver_info) {
        case QCSERIAL_G1K:
                /*
                 * Gobi 1K USB layout:
                 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
                 * 1: serial port (doesn't respond)
                 * 2: AT-capable modem port
                 * 3: QMI/net
                 */
                if (nintf < 3 || nintf > 4) {
                        dev_err(dev, "unknown number of interfaces: %d\n", nintf);
                        altsetting = -1;
                        goto done;
                }

                if (ifnum == 0) {
                        dev_dbg(dev, "Gobi 1K DM/DIAG interface found\n");
                        altsetting = 1;
                } else if (ifnum == 2)
                        dev_dbg(dev, "Modem port found\n");
                else
                        altsetting = -1;
                break;
        case QCSERIAL_G2K:
                /* handle non-standard layouts */
                if (nintf == 5 && id->idProduct == QUECTEL_EC20_PID) {
                        altsetting = handle_quectel_ec20(dev, ifnum);
                        goto done;
                }

                /*
                 * Gobi 2K+ USB layout:
                 * 0: QMI/net
                 * 1: DM/DIAG (use libqcdm from ModemManager for communication)
                 * 2: AT-capable modem port
                 * 3: NMEA
                 */
                if (nintf < 3 || nintf > 4) {
                        dev_err(dev, "unknown number of interfaces: %d\n", nintf);
                        altsetting = -1;
                        goto done;
                }

                switch (ifnum) {
                case 0:
                        /* Don't claim the QMI/net interface */
                        altsetting = -1;
                        break;
                case 1:
                        dev_dbg(dev, "Gobi 2K+ DM/DIAG interface found\n");
                        break;
                case 2:
                        dev_dbg(dev, "Modem port found\n");
                        break;
                case 3:
                        /*
                         * NMEA (serial line 9600 8N1)
                         * # echo "\$GPS_START" > /dev/ttyUSBx
                         * # echo "\$GPS_STOP"  > /dev/ttyUSBx
                         */
                        dev_dbg(dev, "Gobi 2K+ NMEA GPS interface found\n");
                        break;
                }
                break;
        case QCSERIAL_SWI:
                /*
                 * Sierra Wireless layout:
                 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
                 * 2: NMEA
                 * 3: AT-capable modem port
                 * 8: QMI/net
                 */
                switch (ifnum) {
                case 0:
                        dev_dbg(dev, "DM/DIAG interface found\n");
                        break;
                case 2:
                        dev_dbg(dev, "NMEA GPS interface found\n");
                        sendsetup = true;
                        break;
                case 3:
                        dev_dbg(dev, "Modem port found\n");
                        sendsetup = true;
                        break;
                default:
                        /* don't claim any unsupported interface */
                        altsetting = -1;
                        break;
                }
                break;
        case QCSERIAL_HWI:
                /*
                 * Huawei devices map functions by subclass + protocol
                 * instead of interface numbers. The protocol identify
                 * a specific function, while the subclass indicate a
                 * specific firmware source
                 *
                 * This is a list of functions known to be non-serial.  The rest
                 * are assumed to be serial and will be handled by this driver
                 */
                switch (intf->desc.bInterfaceProtocol) {
                        /* QMI combined (qmi_wwan) */
                case 0x07:
                case 0x37:
                case 0x67:
                        /* QMI data (qmi_wwan) */
                case 0x08:
                case 0x38:
                case 0x68:
                        /* QMI control (qmi_wwan) */
                case 0x09:
                case 0x39:
                case 0x69:
                        /* NCM like (huawei_cdc_ncm) */
                case 0x16:
                case 0x46:
                case 0x76:
                        altsetting = -1;
                        break;
                default:
                        dev_dbg(dev, "Huawei type serial port found (%02x/%02x/%02x)\n",
                                intf->desc.bInterfaceClass,
                                intf->desc.bInterfaceSubClass,
                                intf->desc.bInterfaceProtocol);
                }
                break;
        default:
                dev_err(dev, "unsupported device layout type: %lu\n",
                        id->driver_info);
                break;
        }

done:
        if (altsetting >= 0) {
                retval = usb_set_interface(serial->dev, ifnum, altsetting);
                if (retval < 0) {
                        dev_err(dev,
                                "Could not set interface, error %d\n",
                                retval);
                        retval = -ENODEV;
                }
        }

        if (!retval)
                usb_set_serial_data(serial, (void *)(unsigned long)sendsetup);

        return retval;
}

static int qc_attach(struct usb_serial *serial)
{
        struct usb_wwan_intf_private *data;
        bool sendsetup;

        data = kzalloc_obj(*data);
        if (!data)
                return -ENOMEM;

        sendsetup = !!(unsigned long)(usb_get_serial_data(serial));
        if (sendsetup)
                data->use_send_setup = 1;

        spin_lock_init(&data->susp_lock);

        usb_set_serial_data(serial, data);

        return 0;
}

static void qc_release(struct usb_serial *serial)
{
        struct usb_wwan_intf_private *priv = usb_get_serial_data(serial);

        usb_set_serial_data(serial, NULL);
        kfree(priv);
}

static struct usb_serial_driver qcdevice = {
        .driver = {
                .name      = "qcserial",
        },
        .description         = "Qualcomm USB modem",
        .id_table            = id_table,
        .num_ports           = 1,
        .probe               = qcprobe,
        .open                = usb_wwan_open,
        .close               = usb_wwan_close,
        .dtr_rts             = usb_wwan_dtr_rts,
        .write               = usb_wwan_write,
        .write_room          = usb_wwan_write_room,
        .chars_in_buffer     = usb_wwan_chars_in_buffer,
        .tiocmget            = usb_wwan_tiocmget,
        .tiocmset            = usb_wwan_tiocmset,
        .attach              = qc_attach,
        .release             = qc_release,
        .port_probe          = usb_wwan_port_probe,
        .port_remove         = usb_wwan_port_remove,
#ifdef CONFIG_PM
        .suspend             = usb_wwan_suspend,
        .resume              = usb_wwan_resume,
#endif
};

static struct usb_serial_driver * const serial_drivers[] = {
        &qcdevice, NULL
};

module_usb_serial_driver(serial_drivers, id_table);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL v2");