visor.c 29.0 KB
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/*
 * USB HandSpring Visor, Palm m50x, and Sony Clie driver
 * (supports all of the Palm OS USB devices)
 *
 *	Copyright (C) 1999 - 2004
 *	    Greg Kroah-Hartman (greg@kroah.com)
 *
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 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License version
 *	2 as published by the Free Software Foundation.
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 *
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 * See Documentation/usb/usb-serial.txt for more information on using this
 * driver
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 *
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
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#include <linux/uaccess.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include "visor.h"

/*
 * Version Information
 */
#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
#define DRIVER_DESC "USB HandSpring Visor / Palm OS driver"

/* function prototypes for a handspring visor */
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static int  visor_open(struct tty_struct *tty, struct usb_serial_port *port,
					struct file *filp);
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static void visor_close(struct usb_serial_port *port);
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static int  visor_write(struct tty_struct *tty, struct usb_serial_port *port,
					const unsigned char *buf, int count);
static int  visor_write_room(struct tty_struct *tty);
static void visor_throttle(struct tty_struct *tty);
static void visor_unthrottle(struct tty_struct *tty);
static int  visor_probe(struct usb_serial *serial,
					const struct usb_device_id *id);
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static int  visor_calc_num_ports(struct usb_serial *serial);
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static void visor_release(struct usb_serial *serial);
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static void visor_write_bulk_callback(struct urb *urb);
static void visor_read_bulk_callback(struct urb *urb);
static void visor_read_int_callback(struct urb *urb);
static int  clie_3_5_startup(struct usb_serial *serial);
static int  treo_attach(struct usb_serial *serial);
static int clie_5_attach(struct usb_serial *serial);
static int palm_os_3_probe(struct usb_serial *serial,
					const struct usb_device_id *id);
static int palm_os_4_probe(struct usb_serial *serial,
					const struct usb_device_id *id);
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/* Parameters that may be passed into the module. */
static int debug;
static __u16 vendor;
static __u16 product;

static struct usb_device_id id_table [] = {
	{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID),
		.driver_info = (kernel_ulong_t)&palm_os_3_probe },
	{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
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	{ USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
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	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
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	{ USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
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	{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
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	{ USB_DEVICE(ACER_VENDOR_ID, ACER_S10_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
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	{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID),
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		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
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	{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID),
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		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
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	{ USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
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	{ USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID),
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		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ },					/* optional parameter entry */
	{ }					/* Terminating entry */
};

static struct usb_device_id clie_id_5_table [] = {
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID),
		.driver_info = (kernel_ulong_t)&palm_os_4_probe },
	{ },					/* optional parameter entry */
	{ }					/* Terminating entry */
};

static struct usb_device_id clie_id_3_5_table [] = {
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
	{ }					/* Terminating entry */
};

static struct usb_device_id id_table_combined [] = {
	{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) },
	{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) },
	{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) },
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	{ USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) },
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	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) },
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	{ USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) },
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	{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) },
	{ USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) },
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) },
	{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) },
	{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) },
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	{ USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) },
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	{ USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) },
	{ USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) },
	{ USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) },
	{ USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) },
	{ },					/* optional parameter entry */
	{ }					/* Terminating entry */
};

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MODULE_DEVICE_TABLE(usb, id_table_combined);
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static struct usb_driver visor_driver = {
	.name =		"visor",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	id_table_combined,
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	.no_dynamic_id = 	1,
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};

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/* All of the device info needed for the Handspring Visor,
   and Palm 4.0 devices */
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static struct usb_serial_driver handspring_device = {
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	.driver = {
		.owner =	THIS_MODULE,
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		.name =		"visor",
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	},
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	.description =		"Handspring Visor / Palm OS",
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	.usb_driver =		&visor_driver,
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	.id_table =		id_table,
	.num_ports =		2,
	.open =			visor_open,
	.close =		visor_close,
	.throttle =		visor_throttle,
	.unthrottle =		visor_unthrottle,
	.attach =		treo_attach,
	.probe =		visor_probe,
	.calc_num_ports =	visor_calc_num_ports,
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	.release =		visor_release,
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	.write =		visor_write,
	.write_room =		visor_write_room,
	.write_bulk_callback =	visor_write_bulk_callback,
	.read_bulk_callback =	visor_read_bulk_callback,
	.read_int_callback =	visor_read_int_callback,
};

/* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */
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static struct usb_serial_driver clie_5_device = {
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	.driver = {
		.owner =	THIS_MODULE,
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		.name =		"clie_5",
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	},
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	.description =		"Sony Clie 5.0",
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	.usb_driver =		&visor_driver,
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	.id_table =		clie_id_5_table,
	.num_ports =		2,
	.open =			visor_open,
	.close =		visor_close,
	.throttle =		visor_throttle,
	.unthrottle =		visor_unthrottle,
	.attach =		clie_5_attach,
	.probe =		visor_probe,
	.calc_num_ports =	visor_calc_num_ports,
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	.release =		visor_release,
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	.write =		visor_write,
	.write_room =		visor_write_room,
	.write_bulk_callback =	visor_write_bulk_callback,
	.read_bulk_callback =	visor_read_bulk_callback,
	.read_int_callback =	visor_read_int_callback,
};

/* device info for the Sony Clie OS version 3.5 */
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static struct usb_serial_driver clie_3_5_device = {
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	.driver = {
		.owner =	THIS_MODULE,
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		.name =		"clie_3.5",
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	},
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	.description =		"Sony Clie 3.5",
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	.usb_driver =		&visor_driver,
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	.id_table =		clie_id_3_5_table,
	.num_ports =		1,
	.open =			visor_open,
	.close =		visor_close,
	.throttle =		visor_throttle,
	.unthrottle =		visor_unthrottle,
	.attach =		clie_3_5_startup,
	.write =		visor_write,
	.write_room =		visor_write_room,
	.write_bulk_callback =	visor_write_bulk_callback,
	.read_bulk_callback =	visor_read_bulk_callback,
};

struct visor_private {
	spinlock_t lock;
	int bytes_in;
	int bytes_out;
	int outstanding_urbs;
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	unsigned char throttled;
	unsigned char actually_throttled;
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};

/* number of outstanding urbs to prevent userspace DoS from happening */
#define URB_UPPER_LIMIT	42

static int stats;

/******************************************************************************
 * Handspring Visor specific driver functions
 ******************************************************************************/
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static int visor_open(struct tty_struct *tty, struct usb_serial_port *port,
							struct file *filp)
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{
	struct usb_serial *serial = port->serial;
	struct visor_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	int result = 0;

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	dbg("%s - port %d", __func__, port->number);
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	if (!port->read_urb) {
		/* this is needed for some brain dead Sony devices */
		dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n");
		return -ENODEV;
	}

	spin_lock_irqsave(&priv->lock, flags);
	priv->bytes_in = 0;
	priv->bytes_out = 0;
	priv->throttled = 0;
	spin_unlock_irqrestore(&priv->lock, flags);

	/* Start reading from the device */
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	usb_fill_bulk_urb(port->read_urb, serial->dev,
			   usb_rcvbulkpipe(serial->dev,
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					    port->bulk_in_endpointAddress),
			   port->read_urb->transfer_buffer,
			   port->read_urb->transfer_buffer_length,
			   visor_read_bulk_callback, port);
	result = usb_submit_urb(port->read_urb, GFP_KERNEL);
	if (result) {
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		dev_err(&port->dev,
			"%s - failed submitting read urb, error %d\n",
							__func__, result);
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		goto exit;
	}
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	if (port->interrupt_in_urb) {
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		dbg("%s - adding interrupt input for treo", __func__);
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		result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
		if (result)
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			dev_err(&port->dev,
			    "%s - failed submitting interrupt urb, error %d\n",
							__func__, result);
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	}
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exit:
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	return result;
}


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static void visor_close(struct usb_serial_port *port)
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{
	struct visor_private *priv = usb_get_serial_port_data(port);
	unsigned char *transfer_buffer;

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	dbg("%s - port %d", __func__, port->number);
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	/* shutdown our urbs */
	usb_kill_urb(port->read_urb);
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	usb_kill_urb(port->interrupt_in_urb);
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	mutex_lock(&port->serial->disc_mutex);
	if (!port->serial->disconnected) {
		/* Try to send shutdown message, unless the device is gone */
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		transfer_buffer =  kmalloc(0x12, GFP_KERNEL);
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		if (transfer_buffer) {
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			usb_control_msg(port->serial->dev,
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					 usb_rcvctrlpipe(port->serial->dev, 0),
					 VISOR_CLOSE_NOTIFICATION, 0xc2,
					 0x0000, 0x0000,
					 transfer_buffer, 0x12, 300);
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			kfree(transfer_buffer);
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		}
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	}
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	mutex_unlock(&port->serial->disc_mutex);
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	if (stats)
		dev_info(&port->dev, "Bytes In = %d  Bytes Out = %d\n",
			 priv->bytes_in, priv->bytes_out);
}


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static int visor_write(struct tty_struct *tty, struct usb_serial_port *port,
					const unsigned char *buf, int count)
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{
	struct visor_private *priv = usb_get_serial_port_data(port);
	struct usb_serial *serial = port->serial;
	struct urb *urb;
	unsigned char *buffer;
	unsigned long flags;
	int status;

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	dbg("%s - port %d", __func__, port->number);
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	spin_lock_irqsave(&priv->lock, flags);
	if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
		spin_unlock_irqrestore(&priv->lock, flags);
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		dbg("%s - write limit hit\n", __func__);
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		return 0;
	}
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	priv->outstanding_urbs++;
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	spin_unlock_irqrestore(&priv->lock, flags);

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	buffer = kmalloc(count, GFP_ATOMIC);
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	if (!buffer) {
		dev_err(&port->dev, "out of memory\n");
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		count = -ENOMEM;
		goto error_no_buffer;
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	}

	urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!urb) {
		dev_err(&port->dev, "no more free urbs\n");
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		count = -ENOMEM;
		goto error_no_urb;
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	}

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	memcpy(buffer, buf, count);
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	usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
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	usb_fill_bulk_urb(urb, serial->dev,
			   usb_sndbulkpipe(serial->dev,
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					    port->bulk_out_endpointAddress),
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			   buffer, count,
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			   visor_write_bulk_callback, port);

	/* send it down the pipe */
	status = usb_submit_urb(urb, GFP_ATOMIC);
	if (status) {
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		dev_err(&port->dev,
		   "%s - usb_submit_urb(write bulk) failed with status = %d\n",
							__func__, status);
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		count = status;
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		goto error;
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	} else {
		spin_lock_irqsave(&priv->lock, flags);
		priv->bytes_out += count;
		spin_unlock_irqrestore(&priv->lock, flags);
	}

	/* we are done with this urb, so let the host driver
	 * really free it when it is finished with it */
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	usb_free_urb(urb);
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	return count;
error:
	usb_free_urb(urb);
error_no_urb:
	kfree(buffer);
error_no_buffer:
	spin_lock_irqsave(&priv->lock, flags);
	--priv->outstanding_urbs;
	spin_unlock_irqrestore(&priv->lock, flags);
L
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430 431 432 433
	return count;
}


A
Alan Cox 已提交
434
static int visor_write_room(struct tty_struct *tty)
L
Linus Torvalds 已提交
435
{
A
Alan Cox 已提交
436
	struct usb_serial_port *port = tty->driver_data;
P
Pete Zaitcev 已提交
437 438 439
	struct visor_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

440
	dbg("%s - port %d", __func__, port->number);
L
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441 442 443 444

	/*
	 * We really can take anything the user throws at us
	 * but let's pick a nice big number to tell the tty
P
Pete Zaitcev 已提交
445
	 * layer that we have lots of free space, unless we don't.
L
Linus Torvalds 已提交
446
	 */
P
Pete Zaitcev 已提交
447 448 449 450

	spin_lock_irqsave(&priv->lock, flags);
	if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) {
		spin_unlock_irqrestore(&priv->lock, flags);
451
		dbg("%s - write limit hit\n", __func__);
P
Pete Zaitcev 已提交
452 453 454 455
		return 0;
	}
	spin_unlock_irqrestore(&priv->lock, flags);

L
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456 457 458 459
	return 2048;
}


A
Alan Cox 已提交
460
static void visor_write_bulk_callback(struct urb *urb)
L
Linus Torvalds 已提交
461
{
462
	struct usb_serial_port *port = urb->context;
L
Linus Torvalds 已提交
463
	struct visor_private *priv = usb_get_serial_port_data(port);
464
	int status = urb->status;
L
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465 466 467
	unsigned long flags;

	/* free up the transfer buffer, as usb_free_urb() does not do this */
A
Alan Cox 已提交
468
	kfree(urb->transfer_buffer);
L
Linus Torvalds 已提交
469

470
	dbg("%s - port %d", __func__, port->number);
471 472

	if (status)
L
Linus Torvalds 已提交
473
		dbg("%s - nonzero write bulk status received: %d",
474
		    __func__, status);
L
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475 476 477 478 479

	spin_lock_irqsave(&priv->lock, flags);
	--priv->outstanding_urbs;
	spin_unlock_irqrestore(&priv->lock, flags);

480
	usb_serial_port_softint(port);
L
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}


A
Alan Cox 已提交
484
static void visor_read_bulk_callback(struct urb *urb)
L
Linus Torvalds 已提交
485
{
486
	struct usb_serial_port *port = urb->context;
L
Linus Torvalds 已提交
487 488
	struct visor_private *priv = usb_get_serial_port_data(port);
	unsigned char *data = urb->transfer_buffer;
489
	int status = urb->status;
L
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490 491
	struct tty_struct *tty;
	int result;
A
Alan Cox 已提交
492
	int available_room = 0;
L
Linus Torvalds 已提交
493

494
	dbg("%s - port %d", __func__, port->number);
L
Linus Torvalds 已提交
495

496 497
	if (status) {
		dbg("%s - nonzero read bulk status received: %d",
498
		    __func__, status);
L
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499 500 501
		return;
	}

A
Alan Cox 已提交
502 503
	usb_serial_debug_data(debug, &port->dev, __func__,
						urb->actual_length, data);
L
Linus Torvalds 已提交
504

A
Alan Cox 已提交
505 506 507 508
	if (urb->actual_length) {
		tty = tty_port_tty_get(&port->port);
		if (tty) {
			available_room = tty_buffer_request_room(tty,
A
Alan Cox 已提交
509
							urb->actual_length);
A
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510 511 512 513 514 515
			if (available_room) {
				tty_insert_flip_string(tty, data,
							available_room);
				tty_flip_buffer_push(tty);
			}
			tty_kref_put(tty);
516 517 518 519 520 521
		}
		spin_lock(&priv->lock);
		priv->bytes_in += available_room;

	} else {
		spin_lock(&priv->lock);
L
Linus Torvalds 已提交
522 523 524
	}

	/* Continue trying to always read if we should */
525
	if (!priv->throttled) {
A
Alan Cox 已提交
526
		usb_fill_bulk_urb(port->read_urb, port->serial->dev,
L
Linus Torvalds 已提交
527
				   usb_rcvbulkpipe(port->serial->dev,
A
Alan Cox 已提交
528
					   port->bulk_in_endpointAddress),
L
Linus Torvalds 已提交
529 530 531 532 533
				   port->read_urb->transfer_buffer,
				   port->read_urb->transfer_buffer_length,
				   visor_read_bulk_callback, port);
		result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
		if (result)
A
Alan Cox 已提交
534 535 536 537
			dev_err(&port->dev,
			    "%s - failed resubmitting read urb, error %d\n",
							__func__, result);
	} else
538 539
		priv->actually_throttled = 1;
	spin_unlock(&priv->lock);
L
Linus Torvalds 已提交
540 541
}

A
Alan Cox 已提交
542
static void visor_read_int_callback(struct urb *urb)
L
Linus Torvalds 已提交
543
{
544
	struct usb_serial_port *port = urb->context;
545
	int status = urb->status;
L
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546 547
	int result;

548
	switch (status) {
L
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549 550 551 552 553 554 555 556
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
		dbg("%s - urb shutting down with status: %d",
557
		    __func__, status);
L
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558 559 560
		return;
	default:
		dbg("%s - nonzero urb status received: %d",
561
		    __func__, status);
L
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562 563 564 565 566 567 568 569 570 571
		goto exit;
	}

	/*
	 * This information is still unknown what it can be used for.
	 * If anyone has an idea, please let the author know...
	 *
	 * Rumor has it this endpoint is used to notify when data
	 * is ready to be read from the bulk ones.
	 */
572
	usb_serial_debug_data(debug, &port->dev, __func__,
L
Linus Torvalds 已提交
573 574 575
			      urb->actual_length, urb->transfer_buffer);

exit:
A
Alan Cox 已提交
576
	result = usb_submit_urb(urb, GFP_ATOMIC);
L
Linus Torvalds 已提交
577
	if (result)
A
Alan Cox 已提交
578 579 580
		dev_err(&urb->dev->dev,
				"%s - Error %d submitting interrupt urb\n",
							__func__, result);
L
Linus Torvalds 已提交
581 582
}

A
Alan Cox 已提交
583
static void visor_throttle(struct tty_struct *tty)
L
Linus Torvalds 已提交
584
{
A
Alan Cox 已提交
585
	struct usb_serial_port *port = tty->driver_data;
L
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586 587 588
	struct visor_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

589
	dbg("%s - port %d", __func__, port->number);
L
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590 591 592 593 594 595
	spin_lock_irqsave(&priv->lock, flags);
	priv->throttled = 1;
	spin_unlock_irqrestore(&priv->lock, flags);
}


A
Alan Cox 已提交
596
static void visor_unthrottle(struct tty_struct *tty)
L
Linus Torvalds 已提交
597
{
A
Alan Cox 已提交
598
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
599 600 601 602
	struct visor_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	int result;

603
	dbg("%s - port %d", __func__, port->number);
L
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604 605
	spin_lock_irqsave(&priv->lock, flags);
	priv->throttled = 0;
606
	priv->actually_throttled = 0;
L
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607 608 609 610 611
	spin_unlock_irqrestore(&priv->lock, flags);

	port->read_urb->dev = port->serial->dev;
	result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
	if (result)
A
Alan Cox 已提交
612 613 614
		dev_err(&port->dev,
			"%s - failed submitting read urb, error %d\n",
							__func__, result);
L
Linus Torvalds 已提交
615 616
}

A
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617 618
static int palm_os_3_probe(struct usb_serial *serial,
						const struct usb_device_id *id)
L
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619 620 621 622 623 624 625 626 627
{
	struct device *dev = &serial->dev->dev;
	struct visor_connection_info *connection_info;
	unsigned char *transfer_buffer;
	char *string;
	int retval = 0;
	int i;
	int num_ports = 0;

628
	dbg("%s", __func__);
L
Linus Torvalds 已提交
629

A
Alan Cox 已提交
630
	transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL);
L
Linus Torvalds 已提交
631
	if (!transfer_buffer) {
632
		dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __func__,
L
Linus Torvalds 已提交
633 634 635 636 637
			sizeof(*connection_info));
		return -ENOMEM;
	}

	/* send a get connection info request */
A
Alan Cox 已提交
638
	retval = usb_control_msg(serial->dev,
L
Linus Torvalds 已提交
639 640 641 642 643 644
				  usb_rcvctrlpipe(serial->dev, 0),
				  VISOR_GET_CONNECTION_INFORMATION,
				  0xc2, 0x0000, 0x0000, transfer_buffer,
				  sizeof(*connection_info), 300);
	if (retval < 0) {
		dev_err(dev, "%s - error %d getting connection information\n",
645
			__func__, retval);
L
Linus Torvalds 已提交
646 647 648 649
		goto exit;
	}

	if (retval == sizeof(*connection_info)) {
A
Alan Cox 已提交
650 651
			connection_info = (struct visor_connection_info *)
							transfer_buffer;
L
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652 653 654

		num_ports = le16_to_cpu(connection_info->num_ports);
		for (i = 0; i < num_ports; ++i) {
A
Alan Cox 已提交
655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674
			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;
L
Linus Torvalds 已提交
675 676
			}
			dev_info(dev, "%s: port %d, is for %s use\n",
677
				serial->type->description,
L
Linus Torvalds 已提交
678 679 680 681 682 683 684
				connection_info->connections[i].port, string);
		}
	}
	/*
	* Handle devices that report invalid stuff here.
	*/
	if (num_ports == 0 || num_ports > 2) {
A
Alan Cox 已提交
685
		dev_warn(dev, "%s: No valid connect info available\n",
686
			serial->type->description);
L
Linus Torvalds 已提交
687 688
		num_ports = 2;
	}
A
Alan Cox 已提交
689

690
	dev_info(dev, "%s: Number of ports: %d\n", serial->type->description,
L
Linus Torvalds 已提交
691 692 693 694 695 696 697 698
		num_ports);

	/*
	 * save off our num_ports info so that we can use it in the
	 * calc_num_ports callback
	 */
	usb_set_serial_data(serial, (void *)(long)num_ports);

A
Alan Cox 已提交
699 700 701
	/* ask for the number of bytes available, but ignore the
	   response as it is broken */
	retval = usb_control_msg(serial->dev,
L
Linus Torvalds 已提交
702 703 704 705 706 707
				  usb_rcvctrlpipe(serial->dev, 0),
				  VISOR_REQUEST_BYTES_AVAILABLE,
				  0xc2, 0x0000, 0x0005, transfer_buffer,
				  0x02, 300);
	if (retval < 0)
		dev_err(dev, "%s - error %d getting bytes available request\n",
708
			__func__, retval);
L
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709 710 711
	retval = 0;

exit:
A
Alan Cox 已提交
712
	kfree(transfer_buffer);
L
Linus Torvalds 已提交
713 714 715 716

	return retval;
}

A
Alan Cox 已提交
717 718
static int palm_os_4_probe(struct usb_serial *serial,
						const struct usb_device_id *id)
L
Linus Torvalds 已提交
719 720 721 722 723 724
{
	struct device *dev = &serial->dev->dev;
	struct palm_ext_connection_info *connection_info;
	unsigned char *transfer_buffer;
	int retval;

725
	dbg("%s", __func__);
L
Linus Torvalds 已提交
726

A
Alan Cox 已提交
727
	transfer_buffer =  kmalloc(sizeof(*connection_info), GFP_KERNEL);
L
Linus Torvalds 已提交
728
	if (!transfer_buffer) {
729
		dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __func__,
L
Linus Torvalds 已提交
730 731 732 733
			sizeof(*connection_info));
		return -ENOMEM;
	}

A
Alan Cox 已提交
734 735
	retval = usb_control_msg(serial->dev,
				  usb_rcvctrlpipe(serial->dev, 0),
L
Linus Torvalds 已提交
736 737
				  PALM_GET_EXT_CONNECTION_INFORMATION,
				  0xc2, 0x0000, 0x0000, transfer_buffer,
A
Alan Cox 已提交
738
				  sizeof(*connection_info), 300);
L
Linus Torvalds 已提交
739 740
	if (retval < 0)
		dev_err(dev, "%s - error %d getting connection info\n",
741
			__func__, retval);
L
Linus Torvalds 已提交
742
	else
743
		usb_serial_debug_data(debug, &serial->dev->dev, __func__,
L
Linus Torvalds 已提交
744 745
				      retval, transfer_buffer);

A
Alan Cox 已提交
746
	kfree(transfer_buffer);
L
Linus Torvalds 已提交
747 748 749 750
	return 0;
}


A
Alan Cox 已提交
751 752
static int visor_probe(struct usb_serial *serial,
					const struct usb_device_id *id)
L
Linus Torvalds 已提交
753 754
{
	int retval = 0;
A
Alan Cox 已提交
755 756
	int (*startup)(struct usb_serial *serial,
					const struct usb_device_id *id);
L
Linus Torvalds 已提交
757

758
	dbg("%s", __func__);
L
Linus Torvalds 已提交
759 760

	if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
761
		dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",
L
Linus Torvalds 已提交
762 763 764 765 766 767 768 769 770 771 772 773
			serial->dev->actconfig->desc.bConfigurationValue);
		return -ENODEV;
	}

	if (id->driver_info) {
		startup = (void *)id->driver_info;
		retval = startup(serial, id);
	}

	return retval;
}

A
Alan Cox 已提交
774
static int visor_calc_num_ports(struct usb_serial *serial)
L
Linus Torvalds 已提交
775 776 777 778 779 780 781 782 783 784 785
{
	int num_ports = (int)(long)(usb_get_serial_data(serial));

	if (num_ports)
		usb_set_serial_data(serial, NULL);

	return num_ports;
}

static int generic_startup(struct usb_serial *serial)
{
P
Pete Zaitcev 已提交
786
	struct usb_serial_port **ports = serial->port;
L
Linus Torvalds 已提交
787 788 789 790
	struct visor_private *priv;
	int i;

	for (i = 0; i < serial->num_ports; ++i) {
A
Alan Cox 已提交
791
		priv = kzalloc(sizeof(*priv), GFP_KERNEL);
P
Pete Zaitcev 已提交
792 793 794 795 796 797
		if (!priv) {
			while (i-- != 0) {
				priv = usb_get_serial_port_data(ports[i]);
				usb_set_serial_port_data(ports[i], NULL);
				kfree(priv);
			}
L
Linus Torvalds 已提交
798
			return -ENOMEM;
P
Pete Zaitcev 已提交
799
		}
L
Linus Torvalds 已提交
800
		spin_lock_init(&priv->lock);
P
Pete Zaitcev 已提交
801
		usb_set_serial_port_data(ports[i], priv);
L
Linus Torvalds 已提交
802 803 804 805
	}
	return 0;
}

A
Alan Cox 已提交
806
static int clie_3_5_startup(struct usb_serial *serial)
L
Linus Torvalds 已提交
807 808 809 810 811
{
	struct device *dev = &serial->dev->dev;
	int result;
	u8 data;

812
	dbg("%s", __func__);
L
Linus Torvalds 已提交
813 814 815 816 817 818

	/*
	 * Note that PEG-300 series devices expect the following two calls.
	 */

	/* get the config number */
A
Alan Cox 已提交
819
	result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
L
Linus Torvalds 已提交
820 821 822
				  USB_REQ_GET_CONFIGURATION, USB_DIR_IN,
				  0, 0, &data, 1, 3000);
	if (result < 0) {
A
Alan Cox 已提交
823 824
		dev_err(dev, "%s: get config number failed: %d\n",
							__func__, result);
L
Linus Torvalds 已提交
825 826 827
		return result;
	}
	if (result != 1) {
A
Alan Cox 已提交
828 829
		dev_err(dev, "%s: get config number bad return length: %d\n",
							__func__, result);
L
Linus Torvalds 已提交
830 831 832 833
		return -EIO;
	}

	/* get the interface number */
A
Alan Cox 已提交
834 835
	result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
				  USB_REQ_GET_INTERFACE,
L
Linus Torvalds 已提交
836 837 838
				  USB_DIR_IN | USB_RECIP_INTERFACE,
				  0, 0, &data, 1, 3000);
	if (result < 0) {
A
Alan Cox 已提交
839 840
		dev_err(dev, "%s: get interface number failed: %d\n",
							__func__, result);
L
Linus Torvalds 已提交
841 842 843
		return result;
	}
	if (result != 1) {
A
Alan Cox 已提交
844 845 846
		dev_err(dev,
			"%s: get interface number bad return length: %d\n",
							__func__, result);
L
Linus Torvalds 已提交
847 848 849 850 851
		return -EIO;
	}

	return generic_startup(serial);
}
A
Alan Cox 已提交
852 853

static int treo_attach(struct usb_serial *serial)
L
Linus Torvalds 已提交
854 855 856 857 858
{
	struct usb_serial_port *swap_port;

	/* Only do this endpoint hack for the Handspring devices with
	 * interrupt in endpoints, which for now are the Treo devices. */
A
Alan Cox 已提交
859 860 861 862 863
	if (!((le16_to_cpu(serial->dev->descriptor.idVendor)
						== HANDSPRING_VENDOR_ID) ||
		(le16_to_cpu(serial->dev->descriptor.idVendor)
						== KYOCERA_VENDOR_ID)) ||
		(serial->num_interrupt_in == 0))
L
Linus Torvalds 已提交
864 865
		goto generic_startup;

866
	dbg("%s", __func__);
L
Linus Torvalds 已提交
867 868

	/*
A
Alan Cox 已提交
869 870 871 872
	* It appears that Treos and Kyoceras want to use the
	* 1st bulk in endpoint to communicate with the 2nd bulk out endpoint,
	* so let's swap the 1st and 2nd bulk in and interrupt endpoints.
	* Note that swapping the bulk out endpoints would break lots of
L
Linus Torvalds 已提交
873 874 875
	* apps that want to communicate on the second port.
	*/
#define COPY_PORT(dest, src)						\
A
Alan Cox 已提交
876 877 878 879 880 881 882 883 884
	do { \
		dest->read_urb = src->read_urb;				\
		dest->bulk_in_endpointAddress = src->bulk_in_endpointAddress;\
		dest->bulk_in_buffer = src->bulk_in_buffer;		\
		dest->interrupt_in_urb = src->interrupt_in_urb;		\
		dest->interrupt_in_endpointAddress = \
					src->interrupt_in_endpointAddress;\
		dest->interrupt_in_buffer = src->interrupt_in_buffer;	\
	} while (0);
L
Linus Torvalds 已提交
885 886 887 888 889 890 891 892 893 894 895 896 897

	swap_port = kmalloc(sizeof(*swap_port), GFP_KERNEL);
	if (!swap_port)
		return -ENOMEM;
	COPY_PORT(swap_port, serial->port[0]);
	COPY_PORT(serial->port[0], serial->port[1]);
	COPY_PORT(serial->port[1], swap_port);
	kfree(swap_port);

generic_startup:
	return generic_startup(serial);
}

A
Alan Cox 已提交
898
static int clie_5_attach(struct usb_serial *serial)
L
Linus Torvalds 已提交
899
{
900
	dbg("%s", __func__);
L
Linus Torvalds 已提交
901

A
Alan Cox 已提交
902 903 904 905 906
	/* TH55 registers 2 ports.
	   Communication in from the UX50/TH55 uses bulk_in_endpointAddress
	   from port 0. Communication out to the UX50/TH55 uses
	   bulk_out_endpointAddress from port 1

L
Linus Torvalds 已提交
907 908
	   Lets do a quick and dirty mapping
	 */
A
Alan Cox 已提交
909

L
Linus Torvalds 已提交
910 911 912
	/* some sanity check */
	if (serial->num_ports < 2)
		return -1;
A
Alan Cox 已提交
913

L
Linus Torvalds 已提交
914
	/* port 0 now uses the modified endpoint Address */
A
Alan Cox 已提交
915 916
	serial->port[0]->bulk_out_endpointAddress =
				serial->port[1]->bulk_out_endpointAddress;
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	return generic_startup(serial);
}

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static void visor_release(struct usb_serial *serial)
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{
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	struct visor_private *priv;
	int i;

926
	dbg("%s", __func__);
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	for (i = 0; i < serial->num_ports; i++) {
		priv = usb_get_serial_port_data(serial->port[i]);
930
		kfree(priv);
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	}
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}

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static int __init visor_init(void)
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{
	int i, retval;
	/* Only if parameters were passed to us */
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	if (vendor > 0 && product > 0) {
		struct usb_device_id usb_dev_temp[] = {
			{
				USB_DEVICE(vendor, product),
				.driver_info =
					(kernel_ulong_t) &palm_os_4_probe
			}
		};
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		/* Find the last entry in id_table */
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		for (i = 0;; i++) {
			if (id_table[i].idVendor == 0) {
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				id_table[i] = usb_dev_temp[0];
				break;
			}
		}
		/* Find the last entry in id_table_combined */
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		for (i = 0;; i++) {
			if (id_table_combined[i].idVendor == 0) {
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				id_table_combined[i] = usb_dev_temp[0];
				break;
			}
		}
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		printk(KERN_INFO KBUILD_MODNAME
		       ": Untested USB device specified at time of module insertion\n");
		printk(KERN_INFO KBUILD_MODNAME
		       ": Warning: This is not guaranteed to work\n");
		printk(KERN_INFO KBUILD_MODNAME
		       ": Using a newer kernel is preferred to this method\n");
		printk(KERN_INFO KBUILD_MODNAME
		       ": Adding Palm OS protocol 4.x support for unknown device: 0x%x/0x%x\n",
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			vendor, product);
	}
	retval = usb_serial_register(&handspring_device);
	if (retval)
		goto failed_handspring_register;
	retval = usb_serial_register(&clie_3_5_device);
	if (retval)
		goto failed_clie_3_5_register;
	retval = usb_serial_register(&clie_5_device);
	if (retval)
		goto failed_clie_5_register;
	retval = usb_register(&visor_driver);
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	if (retval)
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		goto failed_usb_register;
983
	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
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	return 0;
failed_usb_register:
	usb_serial_deregister(&clie_5_device);
failed_clie_5_register:
	usb_serial_deregister(&clie_3_5_device);
failed_clie_3_5_register:
	usb_serial_deregister(&handspring_device);
failed_handspring_register:
	return retval;
}


static void __exit visor_exit (void)
{
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	usb_deregister(&visor_driver);
	usb_serial_deregister(&handspring_device);
	usb_serial_deregister(&clie_3_5_device);
	usb_serial_deregister(&clie_5_device);
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}


module_init(visor_init);
module_exit(visor_exit);

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MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
module_param(stats, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(stats, "Enables statistics or not");

module_param(vendor, ushort, 0);
MODULE_PARM_DESC(vendor, "User specified vendor ID");
module_param(product, ushort, 0);
MODULE_PARM_DESC(product, "User specified product ID");