linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * IPWireless 3G UMTS TDD Modem driver (USB connected)

 *

 *   Copyright (C) 2004 Roelf Diedericks <roelfd@inet.co.za>

 *   Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>

 *

 * All information about the device was acquired using SnoopyPro

 * on MSFT's O/S, and examing the MSFT drivers' debug output

 * (insanely left _on_ in the enduser version)

 *

 * It was written out of frustration with the IPWireless USB modem

 * supplied by Axity3G/Sentech South Africa not supporting

 * Linux whatsoever.

 *

 * Nobody provided any proprietary information that was not already

 * available for this device.

 *

 * The modem adheres to the "3GPP TS  27.007 AT command set for 3G

 * User Equipment (UE)" standard, available from

 * http://www.3gpp.org/ftp/Specs/html-info/27007.htm

 *

 * The code was only tested the IPWireless handheld modem distributed

 * in South Africa by Sentech.

 *

 * It may work for Woosh Inc in .nz too, as it appears they use the

 * same kit.

 *

 * There is still some work to be done in terms of handling

 * DCD, DTR, RTS, CTS which are currently faked.

 * It's good enough for PPP at this point. It's based off all kinds of

 * code found in usb/serial and usb/class

 */

​

#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/slab.h>

#include <linux/tty.h>

#include <linux/tty_flip.h>

#include <linux/module.h>

#include <linux/spinlock.h>

#include <linux/usb.h>

#include <linux/usb/serial.h>

#include <linux/uaccess.h>

#include "usb-wwan.h"

​

#define DRIVER_AUTHOR   "Roelf Diedericks"

#define DRIVER_DESC "IPWireless tty driver"

​

#define IPW_TTY_MAJOR   240 /* real device node major id, experimental range */

#define IPW_TTY_MINORS  256 /* we support 256 devices, dunno why, it'd be insane :) */

​

#define USB_IPW_MAGIC   0x6d02  /* magic number for ipw struct */

​

​

/* Message sizes */

#define EVENT_BUFFER_SIZE   0xFF

#define CHAR2INT16(c1, c0)  (((u32)((c1) & 0xff) << 8) + (u32)((c0) & 0xff))

​

/* vendor/product pairs that are known work with this driver*/

#define IPW_VID     0x0bc3

#define IPW_PID     0x0001

​

​

/* Vendor commands: */

​

/* baud rates */

enum {

    ipw_sio_b256000 = 0x000e,

    ipw_sio_b128000 = 0x001d,

    ipw_sio_b115200 = 0x0020,

    ipw_sio_b57600  = 0x0040,

    ipw_sio_b56000  = 0x0042,

    ipw_sio_b38400  = 0x0060,

    ipw_sio_b19200  = 0x00c0,

    ipw_sio_b14400  = 0x0100,

    ipw_sio_b9600   = 0x0180,

    ipw_sio_b4800   = 0x0300,

    ipw_sio_b2400   = 0x0600,

    ipw_sio_b1200   = 0x0c00,

    ipw_sio_b600    = 0x1800

};

​

/* data bits */

#define ipw_dtb_7       0x700

#define ipw_dtb_8       0x810   /* ok so the define is misleading, I know, but forces 8,n,1 */

                    /* I mean, is there a point to any other setting these days? :) */

​

/* usb control request types : */

#define IPW_SIO_RXCTL       0x00    /* control bulk rx channel transmissions, value=1/0 (on/off) */

#define IPW_SIO_SET_BAUD    0x01    /* set baud, value=requested ipw_sio_bxxxx */

#define IPW_SIO_SET_LINE    0x03    /* set databits, parity. value=ipw_dtb_x */