// SPDX-License-Identifier: GPL-2.0+
/*
 * USB Keyspan PDA / Xircom / Entrega Converter driver
 *
 * Copyright (C) 1999 - 2001 Greg Kroah-Hartman <greg@kroah.com>
 * Copyright (C) 1999, 2000 Brian Warner        <warner@lothar.com>
 * Copyright (C) 2000 Al Borchers               <borchers@steinerpoint.com>
 * Copyright (C) 2020 Johan Hovold <johan@kernel.org>
 *
 * See Documentation/usb/usb-serial.txt for more information on using this
 * driver
 */


#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/usb/ezusb.h>

/* make a simple define to handle if we are compiling keyspan_pda or xircom support */
#if IS_ENABLED(CONFIG_USB_SERIAL_KEYSPAN_PDA)
        #define KEYSPAN
#else
        #undef KEYSPAN
#endif
#if IS_ENABLED(CONFIG_USB_SERIAL_XIRCOM)
        #define XIRCOM
#else
        #undef XIRCOM
#endif

#define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>, Johan Hovold <johan@kernel.org>"
#define DRIVER_DESC "USB Keyspan PDA Converter driver"

#define KEYSPAN_TX_THRESHOLD    128

struct keyspan_pda_private {
        int                     tx_room;
        struct work_struct      unthrottle_work;
        struct usb_serial       *serial;
        struct usb_serial_port  *port;
};

static int keyspan_pda_write_start(struct usb_serial_port *port);

#define KEYSPAN_VENDOR_ID               0x06cd
#define KEYSPAN_PDA_FAKE_ID             0x0103
#define KEYSPAN_PDA_ID                  0x0104 /* no clue */

/* For Xircom PGSDB9 and older Entrega version of the same device */
#define XIRCOM_VENDOR_ID                0x085a
#define XIRCOM_FAKE_ID                  0x8027
#define XIRCOM_FAKE_ID_2                0x8025 /* "PGMFHUB" serial */
#define ENTREGA_VENDOR_ID               0x1645
#define ENTREGA_FAKE_ID                 0x8093

static const struct usb_device_id id_table_combined[] = {
#ifdef KEYSPAN
        { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
#endif
#ifdef XIRCOM
        { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
        { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID_2) },
        { USB_DEVICE(ENTREGA_VENDOR_ID, ENTREGA_FAKE_ID) },
#endif
        { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
        { }                                             /* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, id_table_combined);

static const struct usb_device_id id_table_std[] = {
        { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
        { }                                             /* Terminating entry */
};

#ifdef KEYSPAN
static const struct usb_device_id id_table_fake[] = {
        { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
        { }                                             /* Terminating entry */
};
#endif

#ifdef XIRCOM
static const struct usb_device_id id_table_fake_xircom[] = {
        { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
        { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID_2) },
        { USB_DEVICE(ENTREGA_VENDOR_ID, ENTREGA_FAKE_ID) },
        { }
};
#endif

static int keyspan_pda_get_write_room(struct keyspan_pda_private *priv)
{
        struct usb_serial_port *port = priv->port;
        struct usb_serial *serial = port->serial;
        u8 *room;
        int rc;

        room = kmalloc(1, GFP_KERNEL);
        if (!room)
                return -ENOMEM;

        rc = usb_control_msg(serial->dev,
                             usb_rcvctrlpipe(serial->dev, 0),
                             6, /* write_room */
                             USB_TYPE_VENDOR | USB_RECIP_INTERFACE
                             | USB_DIR_IN,
                             0, /* value: 0 means "remaining room" */
                             0, /* index */
                             room,
                             1,
                             2000);
        if (rc != 1) {
                if (rc >= 0)
                        rc = -EIO;
                dev_dbg(&port->dev, "roomquery failed: %d\n", rc);
                goto out_free;
        }

        dev_dbg(&port->dev, "roomquery says %d\n", *room);
        rc = *room;
out_free:
        kfree(room);

        return rc;
}

static void keyspan_pda_request_unthrottle(struct work_struct *work)
{
        struct keyspan_pda_private *priv =
                container_of(work, struct keyspan_pda_private, unthrottle_work);
        struct usb_serial_port *port = priv->port;
        struct usb_serial *serial = port->serial;
        unsigned long flags;
        int result;

        dev_dbg(&port->dev, "%s\n", __func__);

        /* ask the device to tell us when the tx buffer becomes
           sufficiently empty */
        result = usb_control_msg(serial->dev,
                                 usb_sndctrlpipe(serial->dev, 0),
                                 7, /* request_unthrottle */
                                 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
                                 | USB_DIR_OUT,
                                 KEYSPAN_TX_THRESHOLD,
                                 0, /* index */
                                 NULL,
                                 0,
                                 2000);
        if (result < 0)
                dev_dbg(&serial->dev->dev, "%s - error %d from usb_control_msg\n",
                        __func__, result);
        /*
         * Need to check available space after requesting notification in case
         * buffer is already empty so that no notification is sent.
         */
        result = keyspan_pda_get_write_room(priv);
        if (result > KEYSPAN_TX_THRESHOLD) {
                spin_lock_irqsave(&port->lock, flags);
                priv->tx_room = max(priv->tx_room, result);
                spin_unlock_irqrestore(&port->lock, flags);

                usb_serial_port_softint(port);
        }
}

static void keyspan_pda_rx_interrupt(struct urb *urb)
{
        struct usb_serial_port *port = urb->context;
        unsigned char *data = urb->transfer_buffer;
        unsigned int len = urb->actual_length;
        int retval;
        int status = urb->status;
        struct keyspan_pda_private *priv;
        unsigned long flags;

        priv = usb_get_serial_port_data(port);

        switch (status) {
        case 0:
                /* success */
                break;
        case -ECONNRESET:
        case -ENOENT:
        case -ESHUTDOWN:
                /* this urb is terminated, clean up */
                dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
                return;
        default:
                dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
                goto exit;
        }

        if (len < 1) {
                dev_warn(&port->dev, "short message received\n");
                goto exit;
        }

        /* see if the message is data or a status interrupt */
        switch (data[0]) {
        case 0:
                 /* rest of message is rx data */
                if (len < 2)
                        break;
                tty_insert_flip_string(&port->port, data + 1, len - 1);
                tty_flip_buffer_push(&port->port);
                break;
        case 1:
                /* status interrupt */
                if (len < 2) {
                        dev_warn(&port->dev, "short interrupt message received\n");
                        break;
                }
                dev_dbg(&port->dev, "rx int, d1=%d\n", data[1]);
                switch (data[1]) {
                case 1: /* modemline change */
                        break;
                case 2: /* tx unthrottle interrupt */
                        spin_lock_irqsave(&port->lock, flags);
                        priv->tx_room = max(priv->tx_room, KEYSPAN_TX_THRESHOLD);
                        spin_unlock_irqrestore(&port->lock, flags);

                        keyspan_pda_write_start(port);

                        /* queue up a wakeup at scheduler time */
                        usb_serial_port_softint(port);
                        break;
                default:
                        break;
                }
                break;
        default:
                break;
        }

exit:
        retval = usb_submit_urb(urb, GFP_ATOMIC);
        if (retval)
                dev_err(&port->dev,
                        "%s - usb_submit_urb failed with result %d\n",
                        __func__, retval);
}


static void keyspan_pda_rx_throttle(struct tty_struct *tty)
{
        /* stop receiving characters. We just turn off the URB request, and
           let chars pile up in the device. If we're doing hardware
           flowcontrol, the device will signal the other end when its buffer
           fills up. If we're doing XON/XOFF, this would be a good time to
           send an XOFF, although it might make sense to foist that off
           upon the device too. */
        struct usb_serial_port *port = tty->driver_data;

        usb_kill_urb(port->interrupt_in_urb);
}


static void keyspan_pda_rx_unthrottle(struct tty_struct *tty)
{
        struct usb_serial_port *port = tty->driver_data;
        /* just restart the receive interrupt URB */

        if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL))
                dev_dbg(&port->dev, "usb_submit_urb(read urb) failed\n");
}


static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud)
{
        int rc;
        int bindex;

        switch (baud) {
        case 110:
                bindex = 0;
                break;
        case 300:
                bindex = 1;
                break;
        case 1200:
                bindex = 2;
                break;
        case 2400:
                bindex = 3;
                break;
        case 4800:
                bindex = 4;
                break;
        case 9600:
                bindex = 5;
                break;
        case 19200:
                bindex = 6;
                break;
        case 38400:
                bindex = 7;
                break;
        case 57600:
                bindex = 8;
                break;
        case 115200:
                bindex = 9;
                break;
        default:
                bindex = 5;     /* Default to 9600 */
                baud = 9600;
        }

        /* rather than figure out how to sleep while waiting for this
           to complete, I just use the "legacy" API. */
        rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
                             0, /* set baud */
                             USB_TYPE_VENDOR
                             | USB_RECIP_INTERFACE
                             | USB_DIR_OUT, /* type */
                             bindex, /* value */
                             0, /* index */
                             NULL, /* &data */
                             0, /* size */
                             2000); /* timeout */
        if (rc < 0)
                return 0;
        return baud;
}


static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state)
{
        struct usb_serial_port *port = tty->driver_data;
        struct usb_serial *serial = port->serial;
        int value;
        int result;

        if (break_state == -1)
                value = 1; /* start break */
        else
                value = 0; /* clear break */
        result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
                        4, /* set break */
                        USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
                        value, 0, NULL, 0, 2000);
        if (result < 0)
                dev_dbg(&port->dev, "%s - error %d from usb_control_msg\n",
                        __func__, result);
        /* there is something funky about this.. the TCSBRK that 'cu' performs
           ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
           seconds apart, but it feels like the break sent isn't as long as it
           is on /dev/ttyS0 */
}


static void keyspan_pda_set_termios(struct tty_struct *tty,
                struct usb_serial_port *port, struct ktermios *old_termios)
{
        struct usb_serial *serial = port->serial;
        speed_t speed;

        /* cflag specifies lots of stuff: number of stop bits, parity, number
           of data bits, baud. What can the device actually handle?:
           CSTOPB (1 stop bit or 2)
           PARENB (parity)
           CSIZE (5bit .. 8bit)
           There is minimal hw support for parity (a PSW bit seems to hold the
           parity of whatever is in the accumulator). The UART either deals
           with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
           1 special, stop). So, with firmware changes, we could do:
           8N1: 10 bit
           8N2: 11 bit, extra bit always (mark?)
           8[EOMS]1: 11 bit, extra bit is parity
           7[EOMS]1: 10 bit, b0/b7 is parity
           7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)

           HW flow control is dictated by the tty->termios.c_cflags & CRTSCTS
           bit.

           For now, just do baud. */

        speed = tty_get_baud_rate(tty);
        speed = keyspan_pda_setbaud(serial, speed);

        if (speed == 0) {
                dev_dbg(&port->dev, "can't handle requested baud rate\n");
                /* It hasn't changed so.. */
                speed = tty_termios_baud_rate(old_termios);
        }
        /* Only speed can change so copy the old h/w parameters
           then encode the new speed */
        tty_termios_copy_hw(&tty->termios, old_termios);
        tty_encode_baud_rate(tty, speed, speed);
}


/* modem control pins: DTR and RTS are outputs and can be controlled.
   DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
   read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */

static int keyspan_pda_get_modem_info(struct usb_serial *serial,
                                      unsigned char *value)
{
        int rc;
        u8 *data;

        data = kmalloc(1, GFP_KERNEL);
        if (!data)
                return -ENOMEM;

        rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
                             3, /* get pins */
                             USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
                             0, 0, data, 1, 2000);
        if (rc == 1)
                *value = *data;
        else if (rc >= 0)
                rc = -EIO;

        kfree(data);
        return rc;
}


static int keyspan_pda_set_modem_info(struct usb_serial *serial,
                                      unsigned char value)
{
        int rc;
        rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
                             3, /* set pins */
                             USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
                             value, 0, NULL, 0, 2000);
        return rc;
}

static int keyspan_pda_tiocmget(struct tty_struct *tty)
{
        struct usb_serial_port *port = tty->driver_data;
        struct usb_serial *serial = port->serial;
        int rc;
        unsigned char status;
        int value;

        rc = keyspan_pda_get_modem_info(serial, &status);
        if (rc < 0)
                return rc;

        value = ((status & BIT(7)) ? TIOCM_DTR : 0) |
                ((status & BIT(6)) ? TIOCM_CAR : 0) |
                ((status & BIT(5)) ? TIOCM_RNG : 0) |
                ((status & BIT(4)) ? TIOCM_DSR : 0) |
                ((status & BIT(3)) ? TIOCM_CTS : 0) |
                ((status & BIT(2)) ? TIOCM_RTS : 0);

        return value;
}

static int keyspan_pda_tiocmset(struct tty_struct *tty,
                                unsigned int set, unsigned int clear)
{
        struct usb_serial_port *port = tty->driver_data;
        struct usb_serial *serial = port->serial;
        int rc;
        unsigned char status;

        rc = keyspan_pda_get_modem_info(serial, &status);
        if (rc < 0)
                return rc;

        if (set & TIOCM_RTS)
                status |= BIT(2);
        if (set & TIOCM_DTR)
                status |= BIT(7);

        if (clear & TIOCM_RTS)
                status &= ~BIT(2);
        if (clear & TIOCM_DTR)
                status &= ~BIT(7);
        rc = keyspan_pda_set_modem_info(serial, status);
        return rc;
}

static int keyspan_pda_write_start(struct usb_serial_port *port)
{
        struct keyspan_pda_private *priv = usb_get_serial_port_data(port);
        unsigned long flags;
        struct urb *urb;
        int count;
        int room;
        int rc;

        /*
         * Guess how much room is left in the device's ring buffer. If our
         * write will result in no room left, ask the device to give us an
         * interrupt when the room available rises above a threshold but also
         * query how much room is currently available (in case our guess was
         * too conservative and the buffer is already empty when the
         * unthrottle work is scheduled).
         */

        /* we might block because of:
           the TX urb is in-flight (wait until it completes)
           the device is full (wait until it says there is room)
        */
        spin_lock_irqsave(&port->lock, flags);

        room = priv->tx_room;
        count = kfifo_len(&port->write_fifo);

        if (!test_bit(0, &port->write_urbs_free) || count == 0 || room == 0) {
                spin_unlock_irqrestore(&port->lock, flags);
                return 0;
        }
        __clear_bit(0, &port->write_urbs_free);

        if (count > room)
                count = room;
        if (count > port->bulk_out_size)
                count = port->bulk_out_size;

        urb = port->write_urb;
        count = kfifo_out(&port->write_fifo, urb->transfer_buffer, count);
        urb->transfer_buffer_length = count;

        port->tx_bytes += count;
        priv->tx_room -= count;

        spin_unlock_irqrestore(&port->lock, flags);

        dev_dbg(&port->dev, "%s - count = %d, txroom = %d\n", __func__, count, room);

        rc = usb_submit_urb(urb, GFP_ATOMIC);
        if (rc) {
                dev_dbg(&port->dev, "usb_submit_urb(write bulk) failed\n");

                spin_lock_irqsave(&port->lock, flags);
                port->tx_bytes -= count;
                priv->tx_room = max(priv->tx_room, room + count);
                __set_bit(0, &port->write_urbs_free);
                spin_unlock_irqrestore(&port->lock, flags);

                return rc;
        }

        if (count == room)
                schedule_work(&priv->unthrottle_work);

        return count;
}

static void keyspan_pda_write_bulk_callback(struct urb *urb)
{
        struct usb_serial_port *port = urb->context;
        unsigned long flags;

        spin_lock_irqsave(&port->lock, flags);
        port->tx_bytes -= urb->transfer_buffer_length;
        __set_bit(0, &port->write_urbs_free);
        spin_unlock_irqrestore(&port->lock, flags);

        keyspan_pda_write_start(port);

        /* queue up a wakeup at scheduler time */
        usb_serial_port_softint(port);
}

static int keyspan_pda_write(struct tty_struct *tty, struct usb_serial_port *port,
                const unsigned char *buf, int count)
{
        int rc;

        dev_dbg(&port->dev, "%s - count = %d\n", __func__, count);

        if (!count)
                return 0;

        count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock);

        rc = keyspan_pda_write_start(port);
        if (rc)
                return rc;

        return count;
}

static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on)
{
        struct usb_serial *serial = port->serial;

        if (on)
                keyspan_pda_set_modem_info(serial, BIT(7) | BIT(2));
        else
                keyspan_pda_set_modem_info(serial, 0);
}


static int keyspan_pda_open(struct tty_struct *tty,
                                        struct usb_serial_port *port)
{
        struct keyspan_pda_private *priv = usb_get_serial_port_data(port);
        int rc;

        /* find out how much room is in the Tx ring */
        rc = keyspan_pda_get_write_room(priv);
        if (rc < 0)
                return rc;

        spin_lock_irq(&port->lock);
        priv->tx_room = rc;
        spin_unlock_irq(&port->lock);

        /*Start reading from the device*/
        rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
        if (rc) {
                dev_dbg(&port->dev, "%s - usb_submit_urb(read int) failed\n", __func__);
                return rc;
        }

        return 0;
}

static void keyspan_pda_close(struct usb_serial_port *port)
{
        struct keyspan_pda_private *priv = usb_get_serial_port_data(port);

        /*
         * Stop the interrupt URB first as its completion handler may submit
         * the write URB.
         */
        usb_kill_urb(port->interrupt_in_urb);
        usb_kill_urb(port->write_urb);

        cancel_work_sync(&priv->unthrottle_work);

        spin_lock_irq(&port->lock);
        kfifo_reset(&port->write_fifo);
        spin_unlock_irq(&port->lock);
}

/* download the firmware to a "fake" device (pre-renumeration) */
static int keyspan_pda_fake_startup(struct usb_serial *serial)
{
        const char *fw_name;

        /* download the firmware here ... */
        ezusb_fx1_set_reset(serial->dev, 1);

        if (0) { ; }
#ifdef KEYSPAN
        else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID)
                fw_name = "keyspan_pda/keyspan_pda.fw";
#endif
#ifdef XIRCOM
        else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) ||
                 (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGA_VENDOR_ID))
                fw_name = "keyspan_pda/xircom_pgs.fw";
#endif
        else {
                dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n",
                        __func__);
                return -ENODEV;
        }

        if (ezusb_fx1_ihex_firmware_download(serial->dev, fw_name) < 0) {
                dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n",
                        fw_name);
                return -ENOENT;
        }

        /* after downloading firmware Renumeration will occur in a
          moment and the new device will bind to the real driver */

        /* we want this device to fail to have a driver assigned to it. */
        return 1;
}

#ifdef KEYSPAN
MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw");
#endif
#ifdef XIRCOM
MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw");
#endif

static int keyspan_pda_port_probe(struct usb_serial_port *port)
{

        struct keyspan_pda_private *priv;

        priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;

        INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle);
        priv->port = port;

        usb_set_serial_port_data(port, priv);

        return 0;
}

static int keyspan_pda_port_remove(struct usb_serial_port *port)
{
        struct keyspan_pda_private *priv;

        priv = usb_get_serial_port_data(port);
        kfree(priv);

        return 0;
}

#ifdef KEYSPAN
static struct usb_serial_driver keyspan_pda_fake_device = {
        .driver = {
                .owner =        THIS_MODULE,
                .name =         "keyspan_pda_pre",
        },
        .description =          "Keyspan PDA - (prerenumeration)",
        .id_table =             id_table_fake,
        .num_ports =            1,
        .attach =               keyspan_pda_fake_startup,
};
#endif

#ifdef XIRCOM
static struct usb_serial_driver xircom_pgs_fake_device = {
        .driver = {
                .owner =        THIS_MODULE,
                .name =         "xircom_no_firm",
        },
        .description =          "Xircom / Entrega PGS - (prerenumeration)",
        .id_table =             id_table_fake_xircom,
        .num_ports =            1,
        .attach =               keyspan_pda_fake_startup,
};
#endif

static struct usb_serial_driver keyspan_pda_device = {
        .driver = {
                .owner =        THIS_MODULE,
                .name =         "keyspan_pda",
        },
        .description =          "Keyspan PDA",
        .id_table =             id_table_std,
        .num_ports =            1,
        .num_bulk_out =         1,
        .num_interrupt_in =     1,
        .dtr_rts =              keyspan_pda_dtr_rts,
        .open =                 keyspan_pda_open,
        .close =                keyspan_pda_close,
        .write =                keyspan_pda_write,
        .write_bulk_callback =  keyspan_pda_write_bulk_callback,
        .read_int_callback =    keyspan_pda_rx_interrupt,
        .throttle =             keyspan_pda_rx_throttle,
        .unthrottle =           keyspan_pda_rx_unthrottle,
        .set_termios =          keyspan_pda_set_termios,
        .break_ctl =            keyspan_pda_break_ctl,
        .tiocmget =             keyspan_pda_tiocmget,
        .tiocmset =             keyspan_pda_tiocmset,
        .port_probe =           keyspan_pda_port_probe,
        .port_remove =          keyspan_pda_port_remove,
};

static struct usb_serial_driver * const serial_drivers[] = {
        &keyspan_pda_device,
#ifdef KEYSPAN
        &keyspan_pda_fake_device,
#endif
#ifdef XIRCOM
        &xircom_pgs_fake_device,
#endif
        NULL
};

module_usb_serial_driver(serial_drivers, id_table_combined);

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