option.c

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/*
  USB Driver for GSM modems

  Copyright (C) 2005  Matthias Urlichs <[e-mail]>

  This driver is free software; you can redistribute it and/or modify
  it under the terms of Version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  Portions copied from the Keyspan driver by Hugh Blemings <[e-mail]>

  History: see the git log.

  Work sponsored by: Sigos GmbH, Germany <[e-mail]>

  This driver exists because the "normal" serial driver doesn't work too well
  with GSM modems. Issues:
  - data loss -- one single Receive URB is not nearly enough
  - nonstandard flow (Option devices) control
  - controlling the baud rate doesn't make sense

  This driver is named "option" because the most common device it's
  used for is a PC-Card (with an internal OHCI-USB interface, behind
  which the GSM interface sits), made by Option Inc.

  Some of the "one port" devices actually exhibit multiple USB instances
  on the USB bus. This is not a bug, these ports are used for different
  device features.
*/

#define DRIVER_VERSION "v0.7.1"
#define DRIVER_AUTHOR "Matthias Urlichs <[e-mail]>"
#define DRIVER_DESC "USB Driver for GSM modems"

#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/bitops.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>

/* Function prototypes */
static int  option_open(struct usb_serial_port *port, struct file *filp);
static void option_close(struct usb_serial_port *port, struct file *filp);
static int  option_startup(struct usb_serial *serial);
static void option_shutdown(struct usb_serial *serial);
static void option_rx_throttle(struct usb_serial_port *port);
static void option_rx_unthrottle(struct usb_serial_port *port);
static int  option_write_room(struct usb_serial_port *port);

static void option_instat_callback(struct urb *urb);

static int option_write(struct usb_serial_port *port,
			const unsigned char *buf, int count);

static int  option_chars_in_buffer(struct usb_serial_port *port);
static int  option_ioctl(struct usb_serial_port *port, struct file *file,
			unsigned int cmd, unsigned long arg);
static void option_set_termios(struct usb_serial_port *port,
				struct ktermios *old);
static void option_break_ctl(struct usb_serial_port *port, int break_state);
static int  option_tiocmget(struct usb_serial_port *port, struct file *file);
static int  option_tiocmset(struct usb_serial_port *port, struct file *file,
				unsigned int set, unsigned int clear);
static int  option_send_setup(struct usb_serial_port *port);

/* Vendor and product IDs */
#define OPTION_VENDOR_ID			0x0AF0
#define OPTION_PRODUCT_COLT			0x5000
#define OPTION_PRODUCT_RICOLA			0x6000
#define OPTION_PRODUCT_RICOLA_LIGHT		0x6100
#define OPTION_PRODUCT_RICOLA_QUAD		0x6200
#define OPTION_PRODUCT_RICOLA_QUAD_LIGHT	0x6300
#define OPTION_PRODUCT_RICOLA_NDIS		0x6050
#define OPTION_PRODUCT_RICOLA_NDIS_LIGHT	0x6150
#define OPTION_PRODUCT_RICOLA_NDIS_QUAD		0x6250
#define OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT	0x6350
#define OPTION_PRODUCT_COBRA			0x6500
#define OPTION_PRODUCT_COBRA_BUS		0x6501
#define OPTION_PRODUCT_VIPER			0x6600
#define OPTION_PRODUCT_VIPER_BUS		0x6601
#define OPTION_PRODUCT_GT_MAX_READY		0x6701
#define OPTION_PRODUCT_GT_MAX			0x6711
#define OPTION_PRODUCT_FUJI_MODEM_LIGHT		0x6721
#define OPTION_PRODUCT_FUJI_MODEM_GT		0x6741
#define OPTION_PRODUCT_FUJI_MODEM_EX		0x6761
#define OPTION_PRODUCT_FUJI_NETWORK_LIGHT	0x6731
#define OPTION_PRODUCT_FUJI_NETWORK_GT		0x6751
#define OPTION_PRODUCT_FUJI_NETWORK_EX		0x6771
#define OPTION_PRODUCT_KOI_MODEM		0x6800
#define OPTION_PRODUCT_KOI_NETWORK		0x6811
#define OPTION_PRODUCT_SCORPION_MODEM		0x6901
#define OPTION_PRODUCT_SCORPION_NETWORK		0x6911
#define OPTION_PRODUCT_ETNA_MODEM		0x7001
#define OPTION_PRODUCT_ETNA_NETWORK		0x7011
#define OPTION_PRODUCT_ETNA_MODEM_LITE		0x7021
#define OPTION_PRODUCT_ETNA_MODEM_GT		0x7041
#define OPTION_PRODUCT_ETNA_MODEM_EX		0x7061
#define OPTION_PRODUCT_ETNA_NETWORK_LITE	0x7031
#define OPTION_PRODUCT_ETNA_NETWORK_GT		0x7051
#define OPTION_PRODUCT_ETNA_NETWORK_EX		0x7071
#define OPTION_PRODUCT_ETNA_KOI_MODEM		0x7100
#define OPTION_PRODUCT_ETNA_KOI_NETWORK		0x7111

#define HUAWEI_VENDOR_ID			0x12D1
#define HUAWEI_PRODUCT_E600			0x1001
#define HUAWEI_PRODUCT_E220			0x1003
#define HUAWEI_PRODUCT_E220BIS			0x1004

#define NOVATELWIRELESS_VENDOR_ID		0x1410
#define DELL_VENDOR_ID				0x413C

#define ANYDATA_VENDOR_ID			0x16d5
#define ANYDATA_PRODUCT_ADU_E100A		0x6501
#define ANYDATA_PRODUCT_ADU_500A		0x6502

#define BANDRICH_VENDOR_ID			0x1A8D
#define BANDRICH_PRODUCT_C100_1			0x1002
#define BANDRICH_PRODUCT_C100_2			0x1003

static struct usb_device_id option_ids[] = {
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_LIGHT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD_LIGHT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_LIGHT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA_BUS) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER_BUS) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX_READY) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_LIGHT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_GT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_EX) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_LIGHT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_GT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_EX) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_MODEM) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_NETWORK) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_MODEM) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_NETWORK) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_LITE) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_GT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_EX) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_LITE) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_GT) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_EX) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_MODEM) },
	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_NETWORK) },
	{ USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220, 0xff, 0xff, 0xff) },
	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220BIS, 0xff, 0xff, 0xff) },
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1100) }, /* Novatel Merlin XS620/S640 */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1110) }, /* Novatel Merlin S620 */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1120) }, /* Novatel Merlin EX720 */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1130) }, /* Novatel Merlin S720 */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1400) }, /* Novatel U730 */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1410) }, /* Novatel U740 */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1420) }, /* Novatel EU870 */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1430) }, /* Novatel Merlin XU870 HSDPA/3G */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2100) }, /* Novatel EV620 CDMA/EV-DO */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2110) }, /* Novatel Merlin ES620 / Merlin ES720 / Ovation U720 */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2130) }, /* Novatel Merlin ES620 SM Bus */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2410) }, /* Novatel EU740 */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x4100) }, /* Novatel U727 */
	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x4400) }, /* Novatel MC950 */
	{ USB_DEVICE(DELL_VENDOR_ID, 0x8114) },	/* Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card == Novatel Expedite EV620 CDMA/EV-DO */
	{ USB_DEVICE(DELL_VENDOR_ID, 0x8115) },	/* Dell Wireless 5500 Mobile Broadband HSDPA Mini-Card == Novatel Expedite EU740 HSDPA/3G */
	{ USB_DEVICE(DELL_VENDOR_ID, 0x8116) },	/* Dell Wireless 5505 Mobile Broadband HSDPA Mini-Card == Novatel Expedite EU740 HSDPA/3G */
	{ USB_DEVICE(DELL_VENDOR_ID, 0x8117) },	/* Dell Wireless 5700 Mobile Broadband CDMA/EVDO ExpressCard == Novatel Merlin XV620 CDMA/EV-DO */
	{ USB_DEVICE(DELL_VENDOR_ID, 0x8118) },	/* Dell Wireless 5510 Mobile Broadband HSDPA ExpressCard == Novatel Merlin XU870 HSDPA/3G */
	{ USB_DEVICE(DELL_VENDOR_ID, 0x8128) },	/* Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card == Novatel Expedite E720 CDMA/EV-DO */
	{ USB_DEVICE(DELL_VENDOR_ID, 0x8136) },	/* Dell Wireless HSDPA 5520 == Novatel Expedite EU860D */
	{ USB_DEVICE(DELL_VENDOR_ID, 0x8137) },	/* Dell Wireless HSDPA 5520 */
	{ USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ADU_E100A) },
	{ USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ADU_500A) },
	{ USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_1) },
	{ USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_2) },
	{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, option_ids);

static struct usb_driver option_driver = {
	.name       = "option",
	.probe      = usb_serial_probe,
	.disconnect = usb_serial_disconnect,
	.id_table   = option_ids,
	.no_dynamic_id = 	1,
};

/* The card has three separate interfaces, which the serial driver
 * recognizes separately, thus num_port=1.
 */

static struct usb_serial_driver option_1port_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"option1",
	},
	.description       = "GSM modem (1-port)",
	.usb_driver        = &option_driver,
	.id_table          = option_ids,
	.num_interrupt_in  = NUM_DONT_CARE,
	.num_bulk_in       = NUM_DONT_CARE,
	.num_bulk_out      = NUM_DONT_CARE,
	.num_ports         = 1,
	.open              = option_open,
	.close             = option_close,
	.write             = option_write,
	.write_room        = option_write_room,
	.chars_in_buffer   = option_chars_in_buffer,
	.throttle          = option_rx_throttle,
	.unthrottle        = option_rx_unthrottle,
	.ioctl             = option_ioctl,
	.set_termios       = option_set_termios,
	.break_ctl         = option_break_ctl,
	.tiocmget          = option_tiocmget,
	.tiocmset          = option_tiocmset,
	.attach            = option_startup,
	.shutdown          = option_shutdown,
	.read_int_callback = option_instat_callback,
};

#ifdef CONFIG_USB_DEBUG
static int debug;
#else
#define debug 0
#endif

/* per port private data */

#define N_IN_URB 4
#define N_OUT_URB 1
#define IN_BUFLEN 4096
#define OUT_BUFLEN 128

struct option_port_private {
	/* Input endpoints and buffer for this port */
	struct urb *in_urbs[N_IN_URB];
	char in_buffer[N_IN_URB][IN_BUFLEN];
	/* Output endpoints and buffer for this port */
	struct urb *out_urbs[N_OUT_URB];
	char out_buffer[N_OUT_URB][OUT_BUFLEN];
	unsigned long out_busy;		/* Bit vector of URBs in use */

	/* Settings for the port */
	int rts_state;	/* Handshaking pins (outputs) */
	int dtr_state;
	int cts_state;	/* Handshaking pins (inputs) */
	int dsr_state;
	int dcd_state;
	int ri_state;

	unsigned long tx_start_time[N_OUT_URB];
};

/* Functions used by new usb-serial code. */
static int __init option_init(void)
{
	int retval;
	retval = usb_serial_register(&option_1port_device);
	if (retval)
		goto failed_1port_device_register;
	retval = usb_register(&option_driver);
	if (retval)
		goto failed_driver_register;

	info(DRIVER_DESC ": " DRIVER_VERSION);

	return 0;

failed_driver_register:
	usb_serial_deregister (&option_1port_device);
failed_1port_device_register:
	return retval;
}

static void __exit option_exit(void)
{
	usb_deregister (&option_driver);
	usb_serial_deregister (&option_1port_device);
}

module_init(option_init);
module_exit(option_exit);

static void option_rx_throttle(struct usb_serial_port *port)
{
	dbg("%s", __FUNCTION__);
}

static void option_rx_unthrottle(struct usb_serial_port *port)
{
	dbg("%s", __FUNCTION__);
}

static void option_break_ctl(struct usb_serial_port *port, int break_state)
{
	/* Unfortunately, I don't know how to send a break */
	dbg("%s", __FUNCTION__);
}

static void option_set_termios(struct usb_serial_port *port,
			struct ktermios *old_termios)
{
	dbg("%s", __FUNCTION__);
	/* Doesn't support option setting */
	tty_termios_copy_hw(port->tty->termios, old_termios);
	option_send_setup(port);
}

static int option_tiocmget(struct usb_serial_port *port, struct file *file)
{
	unsigned int value;
	struct option_port_private *portdata;

	portdata = usb_get_serial_port_data(port);

	value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
		((portdata->dtr_state) ? TIOCM_DTR : 0) |
		((portdata->cts_state) ? TIOCM_CTS : 0) |
		((portdata->dsr_state) ? TIOCM_DSR : 0) |
		((portdata->dcd_state) ? TIOCM_CAR : 0) |
		((portdata->ri_state) ? TIOCM_RNG : 0);

	return value;
}

static int option_tiocmset(struct usb_serial_port *port, struct file *file,
			unsigned int set, unsigned int clear)
{
	struct option_port_private *portdata;

	portdata = usb_get_serial_port_data(port);

	if (set & TIOCM_RTS)
		portdata->rts_state = 1;
	if (set & TIOCM_DTR)
		portdata->dtr_state = 1;

	if (clear & TIOCM_RTS)
		portdata->rts_state = 0;
	if (clear & TIOCM_DTR)
		portdata->dtr_state = 0;
	return option_send_setup(port);
}

static int option_ioctl(struct usb_serial_port *port, struct file *file,
			unsigned int cmd, unsigned long arg)
{
	return -ENOIOCTLCMD;
}

/* Write */
static int option_write(struct usb_serial_port *port,
			const unsigned char *buf, int count)
{
	struct option_port_private *portdata;
	int i;
	int left, todo;
	struct urb *this_urb = NULL; /* spurious */
	int err;

	portdata = usb_get_serial_port_data(port);

	dbg("%s: write (%d chars)", __FUNCTION__, count);

	i = 0;
	left = count;
	for (i=0; left > 0 && i < N_OUT_URB; i++) {
		todo = left;
		if (todo > OUT_BUFLEN)
			todo = OUT_BUFLEN;

		this_urb = portdata->out_urbs[i];
		if (test_and_set_bit(i, &portdata->out_busy)) {
			if (time_before(jiffies,
					portdata->tx_start_time[i] + 10 * HZ))
				continue;
			usb_unlink_urb(this_urb);
			continue;
		}
		if (this_urb->status != 0)
			dbg("usb_write %p failed (err=%d)",
				this_urb, this_urb->status);

		dbg("%s: endpoint %d buf %d", __FUNCTION__,
			usb_pipeendpoint(this_urb->pipe), i);

		/* send the data */
		memcpy (this_urb->transfer_buffer, buf, todo);
		this_urb->transfer_buffer_length = todo;

		this_urb->dev = port->serial->dev;
		err = usb_submit_urb(this_urb, GFP_ATOMIC);
		if (err) {
			dbg("usb_submit_urb %p (write bulk) failed "
				"(%d, has %d)", this_urb,
				err, this_urb->status);
			clear_bit(i, &portdata->out_busy);
			continue;