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/*
* USB HandSpring Visor driver
*
* Copyright (C) 1999, 2000
* 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.
*
* See Documentation/usb/usb-serial.txt for more information on using this driver
*
* (07/03/2000) gkh
* Added visor_set_ioctl and visor_set_termios functions (they don't do much
* of anything, but are good for debugging.)
*
* (06/25/2000) gkh
* Fixed bug in visor_unthrottle that should help with the disconnect in PPP
* bug that people have been reporting.
*
* (06/23/2000) gkh
* Cleaned up debugging statements in a quest to find UHCI timeout bug.
*
* (04/27/2000) Ryan VanderBijl
* Fixed memory leak in visor_close
*
* (03/26/2000) gkh
* Split driver up into device specific pieces.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/malloc.h>
#include <linux/fcntl.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/tty.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#ifdef CONFIG_USB_SERIAL_DEBUG
#define DEBUG
#else
#undef DEBUG
#endif
#include <linux/usb.h>
#include "usb-serial.h"
#include "visor.h"
/* function prototypes for a handspring visor */
static int visor_open (struct usb_serial_port *port, struct file *filp);
static void visor_close (struct usb_serial_port *port, struct file *filp);
static void visor_throttle (struct usb_serial_port *port);
static void visor_unthrottle (struct usb_serial_port *port);
static int visor_startup (struct usb_serial *serial);
static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios);
/* All of the device info needed for the Handspring Visor */
static __u16 handspring_vendor_id = HANDSPRING_VENDOR_ID;
static __u16 handspring_product_id = HANDSPRING_VISOR_ID;
struct usb_serial_device_type handspring_device = {
name: "Handspring Visor",
idVendor: &handspring_vendor_id, /* the Handspring vendor ID */
idProduct: &handspring_product_id, /* the Handspring Visor product id */
needs_interrupt_in: MUST_HAVE_NOT, /* this device must not have an interrupt in endpoint */
needs_bulk_in: MUST_HAVE, /* this device must have a bulk in endpoint */
needs_bulk_out: MUST_HAVE, /* this device must have a bulk out endpoint */
num_interrupt_in: 0,
num_bulk_in: 2,
num_bulk_out: 2,
num_ports: 2,
open: visor_open,
close: visor_close,
throttle: visor_throttle,
unthrottle: visor_unthrottle,
startup: visor_startup,
ioctl: visor_ioctl,
set_termios: visor_set_termios,
};
/******************************************************************************
* Handspring Visor specific driver functions
******************************************************************************/
static int visor_open (struct usb_serial_port *port, struct file *filp)
{
dbg(__FUNCTION__ " - port %d", port->number);
if (port->active) {
dbg (__FUNCTION__ " - device already open");
return -EINVAL;
}
port->active = 1;
/*Start reading from the device*/
if (usb_submit_urb(port->read_urb))
dbg(__FUNCTION__ " - usb_submit_urb(read bulk) failed");
return (0);
}
static void visor_close (struct usb_serial_port *port, struct file * filp)
{
struct usb_serial *serial = port->serial;
unsigned char *transfer_buffer = kmalloc (0x12, GFP_KERNEL);
dbg(__FUNCTION__ " - port %d", port->number);
if (!transfer_buffer) {
err(__FUNCTION__ " - kmalloc(%d) failed.", 0x12);
} else {
/* send a shutdown message to the device */
usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), VISOR_CLOSE_NOTIFICATION,
0xc2, 0x0000, 0x0000, transfer_buffer, 0x12, 300);
kfree (transfer_buffer);
}
/* shutdown our bulk reads and writes */
usb_unlink_urb (port->write_urb);
usb_unlink_urb (port->read_urb);
port->active = 0;
}
static void visor_throttle (struct usb_serial_port *port)
{
dbg(__FUNCTION__ " - port %d", port->number);
usb_unlink_urb (port->read_urb);
return;
}
static void visor_unthrottle (struct usb_serial_port *port)
{
dbg(__FUNCTION__ " - port %d", port->number);
if (usb_submit_urb (port->read_urb))
dbg(__FUNCTION__ " - usb_submit_urb(read bulk) failed");
return;
}
static int visor_startup (struct usb_serial *serial)
{
int response;
int i;
unsigned char *transfer_buffer = kmalloc (256, GFP_KERNEL);
if (!transfer_buffer) {
err(__FUNCTION__ " - kmalloc(%d) failed.", 256);
return -ENOMEM;
}
dbg(__FUNCTION__);
dbg(__FUNCTION__ " - Set config to 1");
usb_set_configuration (serial->dev, 1);
/* send a get connection info request */
response = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), VISOR_GET_CONNECTION_INFORMATION,
0xc2, 0x0000, 0x0000, transfer_buffer, 0x12, 300);
if (response < 0) {
err(__FUNCTION__ " - error getting connection information");
} else {
struct visor_connection_info *connection_info = (struct visor_connection_info *)transfer_buffer;
char *string;
info("%s: Number of ports: %d", serial->type->name, connection_info->num_ports);
for (i = 0; i < connection_info->num_ports; ++i) {
switch (connection_info->connections[i].port_function_id) {
case VISOR_FUNCTION_GENERIC:
string = "Generic";
break;
case VISOR_FUNCTION_DEBUGGER:
string = "Debugger";
break;
case VISOR_FUNCTION_HOTSYNC:
string = "HotSync";
break;
case VISOR_FUNCTION_CONSOLE:
string = "Console";
break;
case VISOR_FUNCTION_REMOTE_FILE_SYS:
string = "Remote File System";
break;
default:
string = "unknown";
break;
}
info("%s: port %d, is for %s use and is bound to ttyUSB%d", serial->type->name, connection_info->connections[i].port, string, serial->minor + i);
}
}
/* ask for the number of bytes available, but ignore the response as it is broken */
response = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), VISOR_REQUEST_BYTES_AVAILABLE,
0xc2, 0x0000, 0x0005, transfer_buffer, 0x02, 300);
if (response < 0) {
err(__FUNCTION__ " - error getting bytes available request");
}
kfree (transfer_buffer);
/* continue on with initialization */
return (0);
}
static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
{
dbg(__FUNCTION__ " - port %d, cmd 0x%.4x", port->number, cmd);
return -ENOIOCTLCMD;
}
/* This function is all nice and good, but we don't change anything based on it :) */
static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios)
{
unsigned int cflag = port->tty->termios->c_cflag;
dbg(__FUNCTION__ " - port %d", port->number);
/* check that they really want us to change something */
if (old_termios) {
if ((cflag == old_termios->c_cflag) &&
(RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
dbg(__FUNCTION__ " - nothing to change...");
return;
}
}
if ((!port->tty) || (!port->tty->termios)) {
dbg(__FUNCTION__" - no tty structures");
return;
}
/* get the byte size */
switch (cflag & CSIZE) {
case CS5: dbg(__FUNCTION__ " - data bits = 5"); break;
case CS6: dbg(__FUNCTION__ " - data bits = 6"); break;
case CS7: dbg(__FUNCTION__ " - data bits = 7"); break;
default:
case CS8: dbg(__FUNCTION__ " - data bits = 8"); break;
}
/* determine the parity */
if (cflag & PARENB)
if (cflag & PARODD)
dbg(__FUNCTION__ " - parity = odd");
else
dbg(__FUNCTION__ " - parity = even");
else
dbg(__FUNCTION__ " - parity = none");
/* figure out the stop bits requested */
if (cflag & CSTOPB)
dbg(__FUNCTION__ " - stop bits = 2");
else
dbg(__FUNCTION__ " - stop bits = 1");
/* figure out the flow control settings */
if (cflag & CRTSCTS)
dbg(__FUNCTION__ " - RTS/CTS is enabled");
else
dbg(__FUNCTION__ " - RTS/CTS is disabled");
/* determine software flow control */
if (I_IXOFF(port->tty))
dbg(__FUNCTION__ " - XON/XOFF is enabled, XON = %2x, XOFF = %2x", START_CHAR(port->tty), STOP_CHAR(port->tty));
else
dbg(__FUNCTION__ " - XON/XOFF is disabled");
/* get the baud rate wanted */
dbg(__FUNCTION__ " - baud rate = %d", tty_get_baud_rate(port->tty));
return;
}
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