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linux/drivers/usb/serial/ipw.c
Greg Kroah-Hartman 6ca98bc284 USB: serial: Remove redundant license text 
Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-04 11:55:38 +01:00

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// 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 */
#define IPW_SIO_SET_PIN 0x03 /* set/clear dtr/rts value=ipw_pin_xxx */
#define IPW_SIO_POLL 0x08 /* get serial port status byte, call with value=0 */
#define IPW_SIO_INIT 0x11 /* initializes ? value=0 (appears as first thing todo on open) */
#define IPW_SIO_PURGE 0x12 /* purge all transmissions?, call with value=numchar_to_purge */
#define IPW_SIO_HANDFLOW 0x13 /* set xon/xoff limits value=0, and a buffer of 0x10 bytes */
#define IPW_SIO_SETCHARS 0x13 /* set the flowcontrol special chars, value=0, buf=6 bytes, */
/* last 2 bytes contain flowcontrol chars e.g. 00 00 00 00 11 13 */
/* values used for request IPW_SIO_SET_PIN */
#define IPW_PIN_SETDTR 0x101
#define IPW_PIN_SETRTS 0x202
#define IPW_PIN_CLRDTR 0x100
#define IPW_PIN_CLRRTS 0x200 /* unconfirmed */
/* values used for request IPW_SIO_RXCTL */
#define IPW_RXBULK_ON 1
#define IPW_RXBULK_OFF 0
/* various 16 byte hardcoded transferbuffers used by flow control */
#define IPW_BYTES_FLOWINIT { 0x01, 0, 0, 0, 0x40, 0, 0, 0, \
0, 0, 0, 0, 0, 0, 0, 0 }
/* Interpretation of modem status lines */
/* These need sorting out by individually connecting pins and checking
* results. FIXME!
* When data is being sent we see 0x30 in the lower byte; this must
* contain DSR and CTS ...
*/
#define IPW_DSR ((1<<4) | (1<<5))
#define IPW_CTS ((1<<5) | (1<<4))
#define IPW_WANTS_TO_SEND 0x30
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(IPW_VID, IPW_PID) },
{ },
};
MODULE_DEVICE_TABLE(usb, id_table);
static int ipw_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct usb_device *udev = port->serial->dev;
struct device *dev = &port->dev;
u8 buf_flow_static[16] = IPW_BYTES_FLOWINIT;
u8 *buf_flow_init;
int result;
buf_flow_init = kmemdup(buf_flow_static, 16, GFP_KERNEL);
if (!buf_flow_init)
return -ENOMEM;
/* --1: Tell the modem to initialize (we think) From sniffs this is
* always the first thing that gets sent to the modem during
* opening of the device */
dev_dbg(dev, "%s: Sending SIO_INIT (we guess)\n", __func__);
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
IPW_SIO_INIT,
USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
0,
0, /* index */
NULL,
0,
100000);
if (result < 0)
dev_err(dev, "Init of modem failed (error = %d)\n", result);
/* reset the bulk pipes */
usb_clear_halt(udev, usb_rcvbulkpipe(udev, port->bulk_in_endpointAddress));
usb_clear_halt(udev, usb_sndbulkpipe(udev, port->bulk_out_endpointAddress));
/*--2: Start reading from the device */
dev_dbg(dev, "%s: setting up bulk read callback\n", __func__);
usb_wwan_open(tty, port);
/*--3: Tell the modem to open the floodgates on the rx bulk channel */
dev_dbg(dev, "%s:asking modem for RxRead (RXBULK_ON)\n", __func__);
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
IPW_SIO_RXCTL,
USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
IPW_RXBULK_ON,
0, /* index */
NULL,
0,
100000);
if (result < 0)
dev_err(dev, "Enabling bulk RxRead failed (error = %d)\n", result);
/*--4: setup the initial flowcontrol */
dev_dbg(dev, "%s:setting init flowcontrol (%s)\n", __func__, buf_flow_init);
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
IPW_SIO_HANDFLOW,
USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
0,
0,
buf_flow_init,
0x10,
200000);
if (result < 0)
dev_err(dev, "initial flowcontrol failed (error = %d)\n", result);
kfree(buf_flow_init);
return 0;
}
static int ipw_attach(struct usb_serial *serial)
{
struct usb_wwan_intf_private *data;
data = kzalloc(sizeof(struct usb_wwan_intf_private), GFP_KERNEL);
if (!data)
return -ENOMEM;
spin_lock_init(&data->susp_lock);
usb_set_serial_data(serial, data);
return 0;
}
static void ipw_release(struct usb_serial *serial)
{
struct usb_wwan_intf_private *data = usb_get_serial_data(serial);
usb_set_serial_data(serial, NULL);
kfree(data);
}
static void ipw_dtr_rts(struct usb_serial_port *port, int on)
{
struct usb_device *udev = port->serial->dev;
struct device *dev = &port->dev;
int result;
dev_dbg(dev, "%s: on = %d\n", __func__, on);
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
IPW_SIO_SET_PIN,
USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
on ? IPW_PIN_SETDTR : IPW_PIN_CLRDTR,
0,
NULL,
0,
200000);
if (result < 0)
dev_err(dev, "setting dtr failed (error = %d)\n", result);
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
IPW_SIO_SET_PIN, USB_TYPE_VENDOR |
USB_RECIP_INTERFACE | USB_DIR_OUT,
on ? IPW_PIN_SETRTS : IPW_PIN_CLRRTS,
0,
NULL,
0,
200000);
if (result < 0)
dev_err(dev, "setting rts failed (error = %d)\n", result);
}
static void ipw_close(struct usb_serial_port *port)
{
struct usb_device *udev = port->serial->dev;
struct device *dev = &port->dev;
int result;
/*--3: purge */
dev_dbg(dev, "%s:sending purge\n", __func__);
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
IPW_SIO_PURGE, USB_TYPE_VENDOR |
USB_RECIP_INTERFACE | USB_DIR_OUT,
0x03,
0,
NULL,
0,
200000);
if (result < 0)
dev_err(dev, "purge failed (error = %d)\n", result);
/* send RXBULK_off (tell modem to stop transmitting bulk data on
rx chan) */
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
IPW_SIO_RXCTL,
USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
IPW_RXBULK_OFF,
0, /* index */
NULL,
0,
100000);
if (result < 0)
dev_err(dev, "Disabling bulk RxRead failed (error = %d)\n", result);
usb_wwan_close(port);
}
static struct usb_serial_driver ipw_device = {
.driver = {
.owner = THIS_MODULE,
.name = "ipw",
},
.description = "IPWireless converter",
.id_table = id_table,
.num_ports = 1,
.open = ipw_open,
.close = ipw_close,
.attach = ipw_attach,
.release = ipw_release,
.port_probe = usb_wwan_port_probe,
.port_remove = usb_wwan_port_remove,
.dtr_rts = ipw_dtr_rts,
.write = usb_wwan_write,
};
static struct usb_serial_driver * const serial_drivers[] = {
&ipw_device, NULL
};
module_usb_serial_driver(serial_drivers, id_table);
/* Module information */
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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