path: root/drivers/input/misc/ati_remote2.c

/*
 * ati_remote2 - ATI/Philips USB RF remote driver
 *
 * Copyright (C) 2005-2008 Ville Syrjala <syrjala@sci.fi>
 * Copyright (C) 2007-2008 Peter Stokes <linux@dadeos.co.uk>
 *
 * 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.
 */

#include <linux/usb/input.h>
#include <linux/slab.h>
#include <linux/module.h>

#define DRIVER_DESC    "ATI/Philips USB RF remote driver"
#define DRIVER_VERSION "0.3"

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_VERSION(DRIVER_VERSION);
MODULE_AUTHOR("Ville Syrjala <syrjala@sci.fi>");
MODULE_LICENSE("GPL");

/*
 * ATI Remote Wonder II Channel Configuration
 *
 * The remote control can by assigned one of sixteen "channels" in order to facilitate
 * the use of multiple remote controls within range of each other.
 * A remote's "channel" may be altered by pressing and holding the "PC" button for
 * approximately 3 seconds, after which the button will slowly flash the count of the
 * currently configured "channel", using the numeric keypad enter a number between 1 and
 * 16 and then press the "PC" button again, the button will slowly flash the count of the
 * newly configured "channel".
 */

enum {
	ATI_REMOTE2_MAX_CHANNEL_MASK = 0xFFFF,
	ATI_REMOTE2_MAX_MODE_MASK = 0x1F,
};

static int ati_remote2_set_mask(const char *val,
				const struct kernel_param *kp,
				unsigned int max)
{
	unsigned int mask;
	int ret;

	if (!val)
		return -EINVAL;

	ret = kstrtouint(val, 0, &mask);
	if (ret)
		return ret;

	if (mask & ~max)
		return -EINVAL;

	*(unsigned int *)kp->arg = mask;

	return 0;
}

static int ati_remote2_set_channel_mask(const char *val,
					const struct kernel_param *kp)
{
	pr_debug("%s()\n", __func__);

	return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_CHANNEL_MASK);
}

static int ati_remote2_get_channel_mask(char *buffer,
					const struct kernel_param *kp)
{
	pr_debug("%s()\n", __func__);

	return sprintf(buffer, "0x%04x", *(unsigned int *)kp->arg);
}

static int ati_remote2_set_mode_mask(const char *val,
				     const struct kernel_param *kp)
{
	pr_debug("%s()\n", __func__);

	return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_MODE_MASK);
}

static int ati_remote2_get_mode_mask(char *buffer,
				     const struct kernel_param *kp)
{
	pr_debug("%s()\n", __func__);

	return sprintf(buffer, "0x%02x", *(unsigned int *)kp->arg);
}

static unsigned int channel_mask = ATI_REMOTE2_MAX_CHANNEL_MASK;
#define param_check_channel_mask(name, p) __param_check(name, p, unsigned int)
static struct kernel_param_ops param_ops_channel_mask = {
	.set = ati_remote2_set_channel_mask,
	.get = ati_remote2_get_channel_mask,
};
module_param(channel_mask, channel_mask, 0644);
MODULE_PARM_DESC(channel_mask, "Bitmask of channels to accept <15:Channel16>...<1:Channel2><0:Channel1>");

static unsigned int mode_mask = ATI_REMOTE2_MAX_MODE_MASK;
#define param_check_mode_mask(name, p) __param_check(name, p, unsigned int)
static struct kernel_param_ops param_ops_mode_mask = {
	.set = ati_remote2_set_mode_mask,
	.get = ati_remote2_get_mode_mask,
};
module_param(mode_mask, mode_mask, 0644);
MODULE_PARM_DESC(mode_mask, "Bitmask of modes to accept <4:PC><3:AUX4><2:AUX3><1:AUX2><0:AUX1>");

static struct usb_device_id ati_remote2_id_table[] = {
	{ USB_DEVICE(0x0471, 0x0602) },	/* ATI Remote Wonder II */
	{ }
};
MODULE_DEVICE_TABLE(usb, ati_remote2_id_table);

static DEFINE_MUTEX(ati_remote2_mutex);

enum {
	ATI_REMOTE2_OPENED = 0x1,
	ATI_REMOTE2_SUSPENDED = 0x2,
};

enum {
	ATI_REMOTE2_AUX1,
	ATI_REMOTE2_AUX2,
	ATI_REMOTE2_AUX3,
	ATI_REMOTE2_AUX4,
	ATI_REMOTE2_PC,
	ATI_REMOTE2_MODES,
};

static const struct {
	u8  hw_code;
	u16 keycode;
} ati_remote2_key_table[] = {
	{ 0x00, KEY_0 },
	{ 0x01, KEY_1 },
	{ 0x02, KEY_2 },
	{ 0x03, KEY_3 },
	{ 0x04, KEY_4 },
	{ 0x05, KEY_5 },
	{ 0x06, KEY_6 },
	{ 0x07, KEY_7 },
	{ 0x08, KEY_8 },
	{ 0x09, KEY_9 },
	{ 0x0c, KEY_POWER },
	{ 0x0d, KEY_MUTE },
	{ 0x10, KEY_VOLUMEUP },
	{ 0x11, KEY_VOLUMEDOWN },
	{ 0x20, KEY_CHANNELUP },
	{ 0x21, KEY_CHANNELDOWN },
	{ 0x28, KEY_FORWARD },
	{ 0x29