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path: root/drivers/usb/serial/ipw.c
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Diffstat (limited to 'drivers/usb/serial/ipw.c')
-rw-r--r--drivers/usb/serial/ipw.c491
1 files changed, 491 insertions, 0 deletions
diff --git a/drivers/usb/serial/ipw.c b/drivers/usb/serial/ipw.c
new file mode 100644
index 00000000000..11105d74f46
--- /dev/null
+++ b/drivers/usb/serial/ipw.c
@@ -0,0 +1,491 @@
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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/init.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.h>
+#include <asm/uaccess.h>
+#include "usb-serial.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.3"
+#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))
+#define NUM_BULK_URBS 24
+#define NUM_CONTROL_URBS 16
+
+/* 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
+//#define IPW_DTR /* Data Terminal Ready */
+//#define IPW_CTS /* Clear To Send */
+//#define IPW_CD /* Carrier Detect */
+//#define IPW_DSR /* Data Set Ready */
+//#define IPW_RxD /* Receive pin */
+
+//#define IPW_LE
+//#define IPW_RTS
+//#define IPW_ST
+//#define IPW_SR
+//#define IPW_RI /* Ring Indicator */
+
+static struct usb_device_id usb_ipw_ids[] = {
+ { USB_DEVICE(IPW_VID, IPW_PID) },
+ { },
+};
+
+MODULE_DEVICE_TABLE(usb, usb_ipw_ids);
+
+static struct usb_driver usb_ipw_driver = {
+ .owner = THIS_MODULE,
+ .name = "ipwtty",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = usb_ipw_ids,
+};
+
+static int debug;
+
+static void ipw_read_bulk_callback(struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_serial_port *port = urb->context;
+ unsigned char *data = urb->transfer_buffer;
+ struct tty_struct *tty;
+ int i;
+ int result;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (urb->status) {
+ dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
+ return;
+ }
+
+ usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
+
+ tty = port->tty;
+ if (tty && urb->actual_length) {
+ for (i = 0; i < urb->actual_length ; ++i) {
+ /* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them. */
+ if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ tty_flip_buffer_push(tty);
+ }
+ /* this doesn't actually push the data through unless tty->low_latency is set */
+ tty_insert_flip_char(tty, data[i], 0);
+ }
+ tty_flip_buffer_push(tty);
+ }
+
+ /* Continue trying to always read */
+ usb_fill_bulk_urb (port->read_urb, port->serial->dev,
+ usb_rcvbulkpipe(port->serial->dev,
+ port->bulk_in_endpointAddress),
+ port->read_urb->transfer_buffer,
+ port->read_urb->transfer_buffer_length,
+ ipw_read_bulk_callback, port);
+ result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+ if (result)
+ dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+ return;
+}
+
+static int ipw_open(struct usb_serial_port *port, struct file *filp)
+{
+ struct usb_device *dev = port->serial->dev;
+ u8 buf_flow_static[16] = IPW_BYTES_FLOWINIT;
+ u8 *buf_flow_init;
+ int result;
+
+ dbg("%s", __FUNCTION__);
+
+ buf_flow_init = kmalloc(16, GFP_KERNEL);
+ if (!buf_flow_init)
+ return -ENOMEM;
+ memcpy(buf_flow_init, buf_flow_static, 16);
+
+ if (port->tty)
+ port->tty->low_latency = 1;
+
+ /* --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 */
+ dbg("%s: Sending SIO_INIT (we guess)",__FUNCTION__);
+ result = usb_control_msg(dev, usb_sndctrlpipe(dev,0),
+ IPW_SIO_INIT,
+ USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+ 0,
+ 0, /* index */
+ NULL,
+ 0,
+ 100000);
+ if (result < 0)
+ dev_err(&port->dev, "Init of modem failed (error = %d)", result);
+
+ /* reset the bulk pipes */
+ usb_clear_halt(dev, usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress));
+ usb_clear_halt(dev, usb_sndbulkpipe(dev, port->bulk_out_endpointAddress));
+
+ /*--2: Start reading from the device */
+ dbg("%s: setting up bulk read callback",__FUNCTION__);
+ usb_fill_bulk_urb(port->read_urb, dev,
+ usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress),
+ port->bulk_in_buffer,
+ port->bulk_in_size,
+ ipw_read_bulk_callback, port);
+ result = usb_submit_urb(port->read_urb, GFP_KERNEL);
+ if (result < 0)
+ dbg("%s - usb_submit_urb(read bulk) failed with status %d", __FUNCTION__, result);
+
+ /*--3: Tell the modem to open the floodgates on the rx bulk channel */
+ dbg("%s:asking modem for RxRead (RXBULK_ON)",__FUNCTION__);
+ result = usb_control_msg(dev, usb_sndctrlpipe(dev, 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(&port->dev, "Enabling bulk RxRead failed (error = %d)", result);
+
+ /*--4: setup the initial flowcontrol */
+ dbg("%s:setting init flowcontrol (%s)",__FUNCTION__,buf_flow_init);
+ result = usb_control_msg(dev, usb_sndctrlpipe(dev, 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(&port->dev, "initial flowcontrol failed (error = %d)", result);
+
+
+ /*--5: raise the dtr */
+ dbg("%s:raising dtr",__FUNCTION__);
+ result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ IPW_SIO_SET_PIN,
+ USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+ IPW_PIN_SETDTR,
+ 0,
+ NULL,
+ 0,
+ 200000);
+ if (result < 0)
+ dev_err(&port->dev, "setting dtr failed (error = %d)", result);
+
+ /*--6: raise the rts */
+ dbg("%s:raising rts",__FUNCTION__);
+ result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ IPW_SIO_SET_PIN,
+ USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+ IPW_PIN_SETRTS,
+ 0,
+ NULL,
+ 0,
+ 200000);
+ if (result < 0)
+ dev_err(&port->dev, "setting dtr failed (error = %d)", result);
+
+ kfree(buf_flow_init);
+ return 0;
+}
+
+static void ipw_close(struct usb_serial_port *port, struct file * filp)
+{
+ struct usb_device *dev = port->serial->dev;
+ int result;
+
+ if (tty_hung_up_p(filp)) {
+ dbg("%s: tty_hung_up_p ...", __FUNCTION__);
+ return;
+ }
+
+ /*--1: drop the dtr */
+ dbg("%s:dropping dtr",__FUNCTION__);
+ result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ IPW_SIO_SET_PIN,
+ USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+ IPW_PIN_CLRDTR,
+ 0,
+ NULL,
+ 0,
+ 200000);
+ if (result < 0)
+ dev_err(&port->dev, "dropping dtr failed (error = %d)", result);
+
+ /*--2: drop the rts */
+ dbg("%s:dropping rts",__FUNCTION__);
+ result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ IPW_SIO_SET_PIN, USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+ IPW_PIN_CLRRTS,
+ 0,
+ NULL,
+ 0,
+ 200000);
+ if (result < 0)
+ dev_err(&port->dev, "dropping rts failed (error = %d)", result);
+
+
+ /*--3: purge */
+ dbg("%s:sending purge",__FUNCTION__);
+ result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ IPW_SIO_PURGE, USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+ 0x03,
+ 0,
+ NULL,
+ 0,
+ 200000);
+ if (result < 0)
+ dev_err(&port->dev, "purge failed (error = %d)", result);
+
+
+ /* send RXBULK_off (tell modem to stop transmitting bulk data on rx chan) */
+ result = usb_control_msg(dev, usb_sndctrlpipe(dev, 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(&port->dev, "Disabling bulk RxRead failed (error = %d)", result);
+
+ /* shutdown any in-flight urbs that we know about */
+ usb_kill_urb(port->read_urb);
+ usb_kill_urb(port->write_urb);
+}
+
+static void ipw_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_serial_port *port = urb->context;
+
+ dbg("%s", __FUNCTION__);
+
+ if (urb->status)
+ dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
+
+ schedule_work(&port->work);
+}
+
+static int ipw_write(struct usb_serial_port *port, const unsigned char *buf, int count)
+{
+ struct usb_device *dev = port->serial->dev;
+ int ret;
+
+ dbg("%s: TOP: count=%d, in_interrupt=%ld", __FUNCTION__,
+ count, in_interrupt() );
+
+ if (count == 0) {
+ dbg("%s - write request of 0 bytes", __FUNCTION__);
+ return 0;
+ }
+
+ /* Racy and broken, FIXME properly! */
+ if (port->write_urb->status == -EINPROGRESS)
+ return 0;
+
+ count = min(count, port->bulk_out_size);
+ memcpy(port->bulk_out_buffer, buf, count);
+
+ dbg("%s count now:%d", __FUNCTION__, count);
+
+ usb_fill_bulk_urb(port->write_urb, dev,
+ usb_sndbulkpipe(dev, port->bulk_out_endpointAddress),
+ port->write_urb->transfer_buffer,
+ count,
+ ipw_write_bulk_callback,
+ port);
+
+ ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+ if (ret != 0) {
+ dbg("%s - usb_submit_urb(write bulk) failed with error = %d", __FUNCTION__, ret);
+ return ret;
+ }
+
+ dbg("%s returning %d", __FUNCTION__, count);
+ return count;
+}
+
+static int ipw_probe(struct usb_serial_port *port)
+{
+ return 0;
+}
+
+static int ipw_disconnect(struct usb_serial_port *port)
+{
+ usb_set_serial_port_data(port, NULL);
+ return 0;
+}
+
+static struct usb_serial_device_type ipw_device = {
+ .owner = THIS_MODULE,
+ .name = "IPWireless converter",
+ .short_name = "ipw",
+ .id_table = usb_ipw_ids,
+ .num_interrupt_in = NUM_DONT_CARE,
+ .num_bulk_in = 1,
+ .num_bulk_out = 1,
+ .num_ports = 1,
+ .open = ipw_open,
+ .close = ipw_close,
+ .port_probe = ipw_probe,
+ .port_remove = ipw_disconnect,
+ .write = ipw_write,
+ .write_bulk_callback = ipw_write_bulk_callback,
+ .read_bulk_callback = ipw_read_bulk_callback,
+};
+
+
+
+static int usb_ipw_init(void)
+{
+ int retval;
+
+ retval = usb_serial_register(&ipw_device);
+ if (retval)
+ return retval;
+ retval = usb_register(&usb_ipw_driver);
+ if (retval) {
+ usb_serial_deregister(&ipw_device);
+ return retval;
+ }
+ info(DRIVER_DESC " " DRIVER_VERSION);
+ return 0;
+}
+
+static void usb_ipw_exit(void)
+{
+ usb_deregister(&usb_ipw_driver);
+ usb_serial_deregister(&ipw_device);
+}
+
+module_init(usb_ipw_init);
+module_exit(usb_ipw_exit);
+
+/* Module information */
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-23 09:41:49 +0000