[deliverable/linux.git] / drivers / platform / x86 / 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>

#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>
5411552c	54
87dc5e32	55	#define COMPAL_DRIVER_VERSION "0.2.6"
5411552c CJ	56
	57	#define COMPAL_LCD_LEVEL_MAX 8
	58
	59	#define COMPAL_EC_COMMAND_WIRELESS 0xBB
	60	#define COMPAL_EC_COMMAND_LCD_LEVEL 0xB9
	61
	62	#define KILLSWITCH_MASK 0x10
	63	#define WLAN_MASK 0x01
	64	#define BT_MASK 0x02
	65
	66	static int force;
	67	module_param(force, bool, 0);
	68	MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
	69
	70	/* Hardware access */
	71
	72	static int set_lcd_level(int level)
	73	{
	74	if (level < 0 \|\| level >= COMPAL_LCD_LEVEL_MAX)
	75	return -EINVAL;
	76
	77	ec_write(COMPAL_EC_COMMAND_LCD_LEVEL, level);
	78
	79	return 0;
	80	}
	81
	82	static int get_lcd_level(void)
	83	{
	84	u8 result;
	85
	86	ec_read(COMPAL_EC_COMMAND_LCD_LEVEL, &result);
	87
	88	return (int) result;
	89	}
	90
	91	static int set_wlan_state(int state)
	92	{
	93	u8 result, value;
	94
	95	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
	96
	97	if ((result & KILLSWITCH_MASK) == 0)
	98	return -EINVAL;
	99	else {
	100	if (state)
	101	value = (u8) (result \| WLAN_MASK);
	102	else
	103	value = (u8) (result & ~WLAN_MASK);
	104	ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
	105	}
	106
	107	return 0;
	108	}
	109
	110	static int set_bluetooth_state(int state)
	111	{
	112	u8 result, value;
	113
	114	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
	115
	116	if ((result & KILLSWITCH_MASK) == 0)
	117	return -EINVAL;
	118	else {
	119	if (state)
120	value = (u8) (result \| BT_MASK);
121	else
122	value = (u8) (result & ~BT_MASK);
123	ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
124	}
125
126	return 0;
127	}
128
129	static int get_wireless_state(int wlan, int bluetooth)
130	{
131	u8 result;
132
133	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
134
135	if (wlan) {
136	if ((result & KILLSWITCH_MASK) == 0)
137	*wlan = 0;
138	else
139	*wlan = result & WLAN_MASK;
140	}
141
142	if (bluetooth) {
143	if ((result & KILLSWITCH_MASK) == 0)
144	*bluetooth = 0;
145	else
146	*bluetooth = (result & BT_MASK) >> 1;
147	}
148
149	return 0;
150	}
151
152	/* Backlight device stuff */
153
154	static int bl_get_brightness(struct backlight_device *b)
155	{
156	return get_lcd_level();
157	}
158
159
160	static int bl_update_status(struct backlight_device *b)
161	{
162	return set_lcd_level(b->props.brightness);
163	}
164
165	static struct backlight_ops compalbl_ops = {
166	.get_brightness = bl_get_brightness,
167	.update_status = bl_update_status,
168	};
169
170	static struct backlight_device *compalbl_device;
171
172	/* Platform device */
173
174	static ssize_t show_wlan(struct device *dev,
175	struct device_attribute attr, char buf)
176	{
177	int ret, enabled;
178
179	ret = get_wireless_state(&enabled, NULL);
180	if (ret < 0)
181	return ret;
182
183	return sprintf(buf, "%i\n", enabled);
184	}
185
186	static ssize_t show_raw(struct device *dev,
187	struct device_attribute attr, char buf)
188	{
189	u8 result;
190
191	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
192
193	return sprintf(buf, "%i\n", result);
194	}
195
196	static ssize_t show_bluetooth(struct device *dev,
197	struct device_attribute attr, char buf)
198	{
199	int ret, enabled;
200
201	ret = get_wireless_state(NULL, &enabled);
202	if (ret < 0)
203	return ret;
204
205	return sprintf(buf, "%i\n", enabled);
206	}
207
5411552c CJ	208	static ssize_t store_wlan_state(struct device *dev,
	209	struct device_attribute attr, const char buf, size_t count)
	210	{
	211	int state, ret;
	212
	213	if (sscanf(buf, "%i", &state) != 1 \|\| (state < 0 \|\| state > 1))
	214	return -EINVAL;
	215
	216	ret = set_wlan_state(state);
	217	if (ret < 0)
	218	return ret;
	219
	220	return count;
	221	}
	222
	223	static ssize_t store_bluetooth_state(struct device *dev,
	224	struct device_attribute attr, const char buf, size_t count)
	225	{
	226	int state, ret;
	227
	228	if (sscanf(buf, "%i", &state) != 1 \|\| (state < 0 \|\| state > 1))
	229	return -EINVAL;
	230
	231	ret = set_bluetooth_state(state);
	232	if (ret < 0)
	233	return ret;
	234
	235	return count;
	236	}
	237
5411552c CJ	238	static DEVICE_ATTR(bluetooth, 0644, show_bluetooth, store_bluetooth_state);
	239	static DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan_state);
	240	static DEVICE_ATTR(raw, 0444, show_raw, NULL);
	241
	242	static struct attribute *compal_attributes[] = {
5411552c CJ	243	&dev_attr_bluetooth.attr,
	244	&dev_attr_wlan.attr,
	245	&dev_attr_raw.attr,
	246	NULL
	247	};
	248
	249	static struct attribute_group compal_attribute_group = {
	250	.attrs = compal_attributes
	251	};
	252
	253	static struct platform_driver compal_driver = {
	254	.driver = {
	255	.name = "compal-laptop",
	256	.owner = THIS_MODULE,
	257	}
	258	};
	259
	260	static struct platform_device *compal_device;
	261
	262	/* Initialization */
	263
	264	static int dmi_check_cb(const struct dmi_system_id *id)
	265	{
	266	printk(KERN_INFO "compal-laptop: Identified laptop model '%s'.\n",
	267	id->ident);
	268
	269	return 0;
	270	}
	271
	272	static struct dmi_system_id __initdata compal_dmi_table[] = {
	273	{
	274	.ident = "FL90/IFL90",
	275	.matches = {
	276	DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
	277	DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
	278	},
	279	.callback = dmi_check_cb
	280	},
	281	{
	282	.ident = "FL90/IFL90",
	283	.matches = {
	284	DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
	285	DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
	286	},
	287	.callback = dmi_check_cb
	288	},
	289	{
	290	.ident = "FL91/IFL91",
	291	.matches = {
	292	DMI_MATCH(DMI_BOARD_NAME, "IFL91"),
	293	DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
	294	},
	295	.callback = dmi_check_cb
	296	},
	297	{
	298	.ident = "FL92/JFL92",
	299	.matches = {
	300	DMI_MATCH(DMI_BOARD_NAME, "JFL92"),
	301	DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
	302	},
	303	.callback = dmi_check_cb
	304	},
	305	{
	306	.ident = "FT00/IFT00",
307	.matches = {
308	DMI_MATCH(DMI_BOARD_NAME, "IFT00"),
309	DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
310	},
311	.callback = dmi_check_cb
312	},
313	{ }
314	};
315
316	static int __init compal_init(void)
317	{
318	int ret;
319
320	if (acpi_disabled)
321	return -ENODEV;
322
323	if (!force && !dmi_check_system(compal_dmi_table))
324	return -ENODEV;
325
326	/* Register backlight stuff */
327
29454f17 TR	328	if (!acpi_video_backlight_support()) {
	329	compalbl_device = backlight_device_register("compal-laptop", NULL, NULL,
	330	&compalbl_ops);
	331	if (IS_ERR(compalbl_device))
	332	return PTR_ERR(compalbl_device);
5411552c	333
29454f17 TR	334	compalbl_device->props.max_brightness = COMPAL_LCD_LEVEL_MAX-1;
29454f17 TR	335	}
5411552c CJ	336
	337	ret = platform_driver_register(&compal_driver);
	338	if (ret)
	339	goto fail_backlight;
	340
	341	/* Register platform stuff */
	342
	343	compal_device = platform_device_alloc("compal-laptop", -1);
	344	if (!compal_device) {
	345	ret = -ENOMEM;
	346	goto fail_platform_driver;
	347	}
	348
	349	ret = platform_device_add(compal_device);
	350	if (ret)
	351	goto fail_platform_device1;
	352
	353	ret = sysfs_create_group(&compal_device->dev.kobj,
	354	&compal_attribute_group);
	355	if (ret)
	356	goto fail_platform_device2;
	357
	358	printk(KERN_INFO "compal-laptop: driver "COMPAL_DRIVER_VERSION
	359	" successfully loaded.\n");
	360
	361	return 0;
	362
	363	fail_platform_device2:
	364
	365	platform_device_del(compal_device);
	366
	367	fail_platform_device1:
	368
	369	platform_device_put(compal_device);
	370
	371	fail_platform_driver:
	372
	373	platform_driver_unregister(&compal_driver);
	374
	375	fail_backlight:
	376
	377	backlight_device_unregister(compalbl_device);
	378
	379	return ret;
	380	}
	381
	382	static void __exit compal_cleanup(void)
	383	{
	384
	385	sysfs_remove_group(&compal_device->dev.kobj, &compal_attribute_group);
	386	platform_device_unregister(compal_device);
	387	platform_driver_unregister(&compal_driver);
	388	backlight_device_unregister(compalbl_device);
	389
	390	printk(KERN_INFO "compal-laptop: driver unloaded.\n");
	391	}
	392
	393	module_init(compal_init);
	394	module_exit(compal_cleanup);
	395
	396	MODULE_AUTHOR("Cezary Jackiewicz");
	397	MODULE_DESCRIPTION("Compal Laptop Support");
	398	MODULE_VERSION(COMPAL_DRIVER_VERSION);
	399	MODULE_LICENSE("GPL");
400
401	MODULE_ALIAS("dmi::rnIFL90:rvrIFT00:");
402	MODULE_ALIAS("dmi::rnIFL90:rvrREFERENCE:");
403	MODULE_ALIAS("dmi::rnIFL91:rvrIFT00:");
404	MODULE_ALIAS("dmi::rnJFL92:rvrIFT00:");
405	MODULE_ALIAS("dmi::rnIFT00:rvrIFT00:");