[deliverable/linux.git] / drivers / misc / compal-laptop.c

/*-*-linux-c-*-*/

/*
  Copyright (C) 2008 Cezary Jackiewicz <cezary.jackiewicz (at) gmail.com>

  based on MSI driver

  Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>

  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.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  02110-1301, USA.
 */

/*
 * comapl-laptop.c - Compal laptop support.
 *
 * This driver exports a few files in /sys/devices/platform/compal-laptop/:
 *
 *   wlan - wlan subsystem state: contains 0 or 1 (rw)
 *
 *   bluetooth - Bluetooth subsystem state: contains 0 or 1 (rw)
 *
 *   raw - raw value taken from embedded controller register (ro)
 *
 * In addition to these platform device attributes the driver
 * registers itself in the Linux backlight control subsystem and is
 * available to userspace under /sys/class/backlight/compal-laptop/.
 *
 * This driver might work on other laptops produced by Compal. If you
 * want to try it you can pass force=1 as argument to the module which
 * will force it to load even when the DMI data doesn't identify the
 * laptop as FL9x.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/backlight.h>
#include <linux/platform_device.h>
#include <linux/autoconf.h>

#define COMPAL_DRIVER_VERSION "0.2.6"

#define COMPAL_LCD_LEVEL_MAX 8

#define COMPAL_EC_COMMAND_WIRELESS 0xBB
#define COMPAL_EC_COMMAND_LCD_LEVEL 0xB9

#define KILLSWITCH_MASK 0x10
#define WLAN_MASK	0x01
#define BT_MASK 	0x02

static int force;
module_param(force, bool, 0);
MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");

/* Hardware access */

static int set_lcd_level(int level)
{
	if (level < 0 || level >= COMPAL_LCD_LEVEL_MAX)
		return -EINVAL;

	ec_write(COMPAL_EC_COMMAND_LCD_LEVEL, level);

	return 0;
}

static int get_lcd_level(void)
{
	u8 result;

	ec_read(COMPAL_EC_COMMAND_LCD_LEVEL, &result);

	return (int) result;
}

static int set_wlan_state(int state)
{
	u8 result, value;

	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);

	if ((result & KILLSWITCH_MASK) == 0)
		return -EINVAL;
	else {
		if (state)
			value = (u8) (result | WLAN_MASK);
		else
			value = (u8) (result & ~WLAN_MASK);
		ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
	}

	return 0;
}

static int set_bluetooth_state(int state)
{
	u8 result, value;

	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);

	if ((result & KILLSWITCH_MASK) == 0)
		return -EINVAL;
	else {
		if (state)
			value = (u8) (result | BT_MASK);
		else
			value = (u8) (result & ~BT_MASK);
		ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
	}

	return 0;
}

static int get_wireless_state(int *wlan, int *bluetooth)
{
	u8 result;

	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);

	if (wlan) {
		if ((result & KILLSWITCH_MASK) == 0)
			*wlan = 0;
		else
			*wlan = result & WLAN_MASK;
	}

	if (bluetooth) {
		if ((result & KILLSWITCH_MASK) == 0)
			*bluetooth = 0;
		else
			*bluetooth = (result & BT_MASK) >> 1;
	}

	return 0;
}

/* Backlight device stuff */

static int bl_get_brightness(struct backlight_device *b)
{
	return get_lcd_level();
}


static int bl_update_status(struct backlight_device *b)
{
	return set_lcd_level(b->props.brightness);
}

static struct backlight_ops compalbl_ops = {
	.get_brightness = bl_get_brightness,
	.update_status	= bl_update_status,
};

static struct backlight_device *compalbl_device;

/* Platform device */

static ssize_t show_wlan(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	int ret, enabled;

	ret = get_wireless_state(&enabled, NULL);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%i\n", enabled);
}

static ssize_t show_raw(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	u8 result;

	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);

	return sprintf(buf, "%i\n", result);
}

static ssize_t show_bluetooth(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	int ret, enabled;

	ret = get_wireless_state(NULL, &enabled);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%i\n", enabled);
}

static ssize_t store_wlan_state(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	int state, ret;

	if (sscanf(buf, "%i", &state) != 1 || (state < 0 || state > 1))
		return -EINVAL;

	ret = set_wlan_state(state);
	if (ret < 0)
		return ret;

	return count;
}

static ssize_t store_bluetooth_state(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	int state, ret;

	if (sscanf(buf, "%i", &state) != 1 || (state < 0 || state > 1))
		return -EINVAL;

	ret = set_bluetooth_state(state);
	if (ret < 0)
		return ret;

	return count;
}

static DEVICE_ATTR(bluetooth, 0644, show_bluetooth, store_bluetooth_state);
static DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan_state);
static DEVICE_ATTR(raw, 0444, show_raw, NULL);

static struct attribute *compal_attributes[] = {
	&dev_attr_bluetooth.attr,
	&dev_attr_wlan.attr,
	&dev_attr_raw.attr,
	NULL
};

static struct attribute_group compal_attribute_group = {
	.attrs = compal_attributes
};

static struct platform_driver compal_driver = {
	.driver = {
		.name = "compal-laptop",
		.owner = THIS_MODULE,
	}
};

static struct platform_device *compal_device;

/* Initialization */

static int dmi_check_cb(const struct dmi_system_id *id)
{
	printk(KERN_INFO "compal-laptop: Identified laptop model '%s'.\n",
		id->ident);

	return 0;
}

static struct dmi_system_id __initdata compal_dmi_table[] = {
	{
		.ident = "FL90/IFL90",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
			DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "FL90/IFL90",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
			DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "FL91/IFL91",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "IFL91"),
			DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "FL92/JFL92",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "JFL92"),
			DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "FT00/IFT00",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "IFT00"),
			DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
		},
		.callback = dmi_check_cb
	},
	{ }
};

static int __init compal_init(void)
{
	int ret;

	if (acpi_disabled)
		return -ENODEV;

	if (!force && !dmi_check_system(compal_dmi_table))
		return -ENODEV;

	/* Register backlight stuff */

	if (!acpi_video_backlight_support()) {
		compalbl_device = backlight_device_register("compal-laptop", NULL, NULL,
							    &compalbl_ops);
		if (IS_ERR(compalbl_device))
			return PTR_ERR(compalbl_device);

		compalbl_device->props.max_brightness = COMPAL_LCD_LEVEL_MAX-1;
	}

	ret = platform_driver_register(&compal_driver);
	if (ret)
		goto fail_backlight;

	/* Register platform stuff */

	compal_device = platform_device_alloc("compal-laptop", -1);
	if (!compal_device) {
		ret = -ENOMEM;
		goto fail_platform_driver;
	}

	ret = platform_device_add(compal_device);
	if (ret)
		goto fail_platform_device1;

	ret = sysfs_create_group(&compal_device->dev.kobj,
		&compal_attribute_group);
	if (ret)
		goto fail_platform_device2;

	printk(KERN_INFO "compal-laptop: driver "COMPAL_DRIVER_VERSION
		" successfully loaded.\n");

	return 0;

fail_platform_device2:

	platform_device_del(compal_device);

fail_platform_device1:

	platform_device_put(compal_device);

fail_platform_driver:

	platform_driver_unregister(&compal_driver);

fail_backlight:

	backlight_device_unregister(compalbl_device);

	return ret;
}

static void __exit compal_cleanup(void)
{

	sysfs_remove_group(&compal_device->dev.kobj, &compal_attribute_group);
	platform_device_unregister(compal_device);
	platform_driver_unregister(&compal_driver);
	backlight_device_unregister(compalbl_device);

	printk(KERN_INFO "compal-laptop: driver unloaded.\n");
}

module_init(compal_init);
module_exit(compal_cleanup);

MODULE_AUTHOR("Cezary Jackiewicz");
MODULE_DESCRIPTION("Compal Laptop Support");
MODULE_VERSION(COMPAL_DRIVER_VERSION);
MODULE_LICENSE("GPL");

MODULE_ALIAS("dmi:*:rnIFL90:rvrIFT00:*");
MODULE_ALIAS("dmi:*:rnIFL90:rvrREFERENCE:*");
MODULE_ALIAS("dmi:*:rnIFL91:rvrIFT00:*");
MODULE_ALIAS("dmi:*:rnJFL92:rvrIFT00:*");
MODULE_ALIAS("dmi:*:rnIFT00:rvrIFT00:*");
Commit	Line	Data
5411552c CJ	1	/--linux-c--/
	2
	3	/*
	4	Copyright (C) 2008 Cezary Jackiewicz <cezary.jackiewicz (at) gmail.com>
	5
	6	based on MSI driver
	7
	8	Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>
	9
	10	This program is free software; you can redistribute it and/or modify
	11	it under the terms of the GNU General Public License as published by
	12	the Free Software Foundation; either version 2 of the License, or
	13	(at your option) any later version.
	14
	15	This program is distributed in the hope that it will be useful, but
	16	WITHOUT ANY WARRANTY; without even the implied warranty of
	17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	General Public License for more details.
	19
	20	You should have received a copy of the GNU General Public License
	21	along with this program; if not, write to the Free Software
	22	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	23	02110-1301, USA.
	24	*/
	25
	26	/*
	27	* comapl-laptop.c - Compal laptop support.
	28	*
	29	* This driver exports a few files in /sys/devices/platform/compal-laptop/:
	30	*
5411552c CJ	31	* wlan - wlan subsystem state: contains 0 or 1 (rw)
	32	*
	33	* bluetooth - Bluetooth subsystem state: contains 0 or 1 (rw)
	34	*
	35	* raw - raw value taken from embedded controller register (ro)
	36	*
	37	* In addition to these platform device attributes the driver
	38	* registers itself in the Linux backlight control subsystem and is
	39	* available to userspace under /sys/class/backlight/compal-laptop/.
	40	*
	41	* This driver might work on other laptops produced by Compal. If you
	42	* want to try it you can pass force=1 as argument to the module which
	43	* will force it to load even when the DMI data doesn't identify the
87dc5e32	44	* laptop as FL9x.
5411552c CJ	45	*/
	46
	47	#include <linux/module.h>
	48	#include <linux/kernel.h>
	49	#include <linux/init.h>
	50	#include <linux/acpi.h>
	51	#include <linux/dmi.h>
	52	#include <linux/backlight.h>
	53	#include <linux/platform_device.h>
	54	#include <linux/autoconf.h>
	55
87dc5e32	56	#define COMPAL_DRIVER_VERSION "0.2.6"
5411552c CJ	57
	58	#define COMPAL_LCD_LEVEL_MAX 8
	59
	60	#define COMPAL_EC_COMMAND_WIRELESS 0xBB
	61	#define COMPAL_EC_COMMAND_LCD_LEVEL 0xB9
	62
	63	#define KILLSWITCH_MASK 0x10
	64	#define WLAN_MASK 0x01
	65	#define BT_MASK 0x02
	66
	67	static int force;
	68	module_param(force, bool, 0);
	69	MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
	70
	71	/* Hardware access */
	72
	73	static int set_lcd_level(int level)
	74	{
	75	if (level < 0 \|\| level >= COMPAL_LCD_LEVEL_MAX)
	76	return -EINVAL;
	77
	78	ec_write(COMPAL_EC_COMMAND_LCD_LEVEL, level);
	79
	80	return 0;
	81	}
	82
	83	static int get_lcd_level(void)
	84	{
	85	u8 result;
	86
	87	ec_read(COMPAL_EC_COMMAND_LCD_LEVEL, &result);
	88
	89	return (int) result;
	90	}
	91
	92	static int set_wlan_state(int state)
	93	{
	94	u8 result, value;
	95
	96	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
	97
	98	if ((result & KILLSWITCH_MASK) == 0)
	99	return -EINVAL;
	100	else {
	101	if (state)
	102	value = (u8) (result \| WLAN_MASK);
	103	else
	104	value = (u8) (result & ~WLAN_MASK);
	105	ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
	106	}
	107
	108	return 0;
	109	}
	110
	111	static int set_bluetooth_state(int state)
	112	{
	113	u8 result, value;
	114
	115	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
	116
	117	if ((result & KILLSWITCH_MASK) == 0)
	118	return -EINVAL;
	119	else {
	120	if (state)
121	value = (u8) (result \| BT_MASK);
122	else
123	value = (u8) (result & ~BT_MASK);
124	ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
125	}
126
127	return 0;
128	}
129
130	static int get_wireless_state(int wlan, int bluetooth)
131	{
132	u8 result;
133
134	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
135
136	if (wlan) {
137	if ((result & KILLSWITCH_MASK) == 0)
138	*wlan = 0;
139	else
140	*wlan = result & WLAN_MASK;
141	}
142
143	if (bluetooth) {
144	if ((result & KILLSWITCH_MASK) == 0)
145	*bluetooth = 0;
146	else
147	*bluetooth = (result & BT_MASK) >> 1;
148	}
149
150	return 0;
151	}
152
153	/* Backlight device stuff */
154
155	static int bl_get_brightness(struct backlight_device *b)
156	{
157	return get_lcd_level();
158	}
159
160
161	static int bl_update_status(struct backlight_device *b)
162	{
163	return set_lcd_level(b->props.brightness);
164	}
165
166	static struct backlight_ops compalbl_ops = {
167	.get_brightness = bl_get_brightness,
168	.update_status = bl_update_status,
169	};
170
171	static struct backlight_device *compalbl_device;
172
173	/* Platform device */
174
175	static ssize_t show_wlan(struct device *dev,
176	struct device_attribute attr, char buf)
177	{
178	int ret, enabled;
179
180	ret = get_wireless_state(&enabled, NULL);
181	if (ret < 0)
182	return ret;
183
184	return sprintf(buf, "%i\n", enabled);
185	}
186
187	static ssize_t show_raw(struct device *dev,
188	struct device_attribute attr, char buf)
189	{
190	u8 result;
191
192	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
193
194	return sprintf(buf, "%i\n", result);
195	}
196
197	static ssize_t show_bluetooth(struct device *dev,
198	struct device_attribute attr, char buf)
199	{
200	int ret, enabled;
201
202	ret = get_wireless_state(NULL, &enabled);
203	if (ret < 0)
204	return ret;
205
206	return sprintf(buf, "%i\n", enabled);
207	}
208
5411552c CJ	209	static ssize_t store_wlan_state(struct device *dev,
	210	struct device_attribute attr, const char buf, size_t count)
	211	{
	212	int state, ret;
	213
	214	if (sscanf(buf, "%i", &state) != 1 \|\| (state < 0 \|\| state > 1))
	215	return -EINVAL;
	216
	217	ret = set_wlan_state(state);
	218	if (ret < 0)
	219	return ret;
	220
	221	return count;
	222	}
	223
	224	static ssize_t store_bluetooth_state(struct device *dev,
	225	struct device_attribute attr, const char buf, size_t count)
	226	{
	227	int state, ret;
	228
	229	if (sscanf(buf, "%i", &state) != 1 \|\| (state < 0 \|\| state > 1))
	230	return -EINVAL;
	231
	232	ret = set_bluetooth_state(state);
	233	if (ret < 0)
	234	return ret;
	235
	236	return count;
	237	}
	238
5411552c CJ	239	static DEVICE_ATTR(bluetooth, 0644, show_bluetooth, store_bluetooth_state);
	240	static DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan_state);
	241	static DEVICE_ATTR(raw, 0444, show_raw, NULL);
	242
	243	static struct attribute *compal_attributes[] = {
5411552c CJ	244	&dev_attr_bluetooth.attr,
	245	&dev_attr_wlan.attr,
	246	&dev_attr_raw.attr,
	247	NULL
	248	};
	249
	250	static struct attribute_group compal_attribute_group = {
	251	.attrs = compal_attributes
	252	};
	253
	254	static struct platform_driver compal_driver = {
	255	.driver = {
	256	.name = "compal-laptop",
	257	.owner = THIS_MODULE,
	258	}
	259	};
	260
	261	static struct platform_device *compal_device;
	262
	263	/* Initialization */
	264
	265	static int dmi_check_cb(const struct dmi_system_id *id)
	266	{
	267	printk(KERN_INFO "compal-laptop: Identified laptop model '%s'.\n",
	268	id->ident);
	269
	270	return 0;
	271	}
	272
	273	static struct dmi_system_id __initdata compal_dmi_table[] = {
	274	{
	275	.ident = "FL90/IFL90",
	276	.matches = {
	277	DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
	278	DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
	279	},
	280	.callback = dmi_check_cb
	281	},
	282	{
	283	.ident = "FL90/IFL90",
	284	.matches = {
	285	DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
	286	DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
	287	},
	288	.callback = dmi_check_cb
	289	},
	290	{
	291	.ident = "FL91/IFL91",
	292	.matches = {
	293	DMI_MATCH(DMI_BOARD_NAME, "IFL91"),
	294	DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
	295	},
	296	.callback = dmi_check_cb
	297	},
	298	{
	299	.ident = "FL92/JFL92",
	300	.matches = {
	301	DMI_MATCH(DMI_BOARD_NAME, "JFL92"),
	302	DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
	303	},
	304	.callback = dmi_check_cb
	305	},
	306	{
	307	.ident = "FT00/IFT00",
308	.matches = {
309	DMI_MATCH(DMI_BOARD_NAME, "IFT00"),
310	DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
311	},
312	.callback = dmi_check_cb
313	},
314	{ }
315	};
316
317	static int __init compal_init(void)
318	{
319	int ret;
320
321	if (acpi_disabled)
322	return -ENODEV;
323
324	if (!force && !dmi_check_system(compal_dmi_table))
325	return -ENODEV;
326
327	/* Register backlight stuff */
328
29454f17 TR	329	if (!acpi_video_backlight_support()) {
	330	compalbl_device = backlight_device_register("compal-laptop", NULL, NULL,
	331	&compalbl_ops);
	332	if (IS_ERR(compalbl_device))
	333	return PTR_ERR(compalbl_device);
5411552c	334
29454f17 TR	335	compalbl_device->props.max_brightness = COMPAL_LCD_LEVEL_MAX-1;
29454f17 TR	336	}
5411552c CJ	337
	338	ret = platform_driver_register(&compal_driver);
	339	if (ret)
	340	goto fail_backlight;
	341
	342	/* Register platform stuff */
	343
	344	compal_device = platform_device_alloc("compal-laptop", -1);
	345	if (!compal_device) {
	346	ret = -ENOMEM;
	347	goto fail_platform_driver;
	348	}
	349
	350	ret = platform_device_add(compal_device);
	351	if (ret)
	352	goto fail_platform_device1;
	353
	354	ret = sysfs_create_group(&compal_device->dev.kobj,
	355	&compal_attribute_group);
	356	if (ret)
	357	goto fail_platform_device2;
	358
	359	printk(KERN_INFO "compal-laptop: driver "COMPAL_DRIVER_VERSION
	360	" successfully loaded.\n");
	361
	362	return 0;
	363
	364	fail_platform_device2:
	365
	366	platform_device_del(compal_device);
	367
	368	fail_platform_device1:
	369
	370	platform_device_put(compal_device);
	371
	372	fail_platform_driver:
	373
	374	platform_driver_unregister(&compal_driver);
	375
	376	fail_backlight:
	377
	378	backlight_device_unregister(compalbl_device);
	379
	380	return ret;
	381	}
	382
	383	static void __exit compal_cleanup(void)
	384	{
	385
	386	sysfs_remove_group(&compal_device->dev.kobj, &compal_attribute_group);
	387	platform_device_unregister(compal_device);
	388	platform_driver_unregister(&compal_driver);
	389	backlight_device_unregister(compalbl_device);
	390
	391	printk(KERN_INFO "compal-laptop: driver unloaded.\n");
	392	}
	393
	394	module_init(compal_init);
	395	module_exit(compal_cleanup);
	396
	397	MODULE_AUTHOR("Cezary Jackiewicz");
	398	MODULE_DESCRIPTION("Compal Laptop Support");
	399	MODULE_VERSION(COMPAL_DRIVER_VERSION);
	400	MODULE_LICENSE("GPL");
401
402	MODULE_ALIAS("dmi::rnIFL90:rvrIFT00:");
403	MODULE_ALIAS("dmi::rnIFL90:rvrREFERENCE:");
404	MODULE_ALIAS("dmi::rnIFL91:rvrIFT00:");
405	MODULE_ALIAS("dmi::rnJFL92:rvrIFT00:");
406	MODULE_ALIAS("dmi::rnIFT00:rvrIFT00:");