[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hwmon / hp_accel.c

/*
 *  hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
 *
 *  Copyright (C) 2007-2008 Yan Burman
 *  Copyright (C) 2008 Eric Piel
 *  Copyright (C) 2008 Pavel Machek
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/dmi.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/kthread.h>
#include <linux/semaphore.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include <linux/poll.h>
#include <linux/freezer.h>
#include <linux/version.h>
#include <linux/uaccess.h>
#include <acpi/acpi_drivers.h>
#include <asm/atomic.h>
#include "lis3lv02d.h"

#define DRIVER_NAME     "lis3lv02d"
#define ACPI_MDPS_CLASS "accelerometer"


/* For automatic insertion of the module */
static struct acpi_device_id lis3lv02d_device_ids[] = {
	{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);


/**
 * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
 * @handle: the handle of the device
 *
 * Returns AE_OK on success.
 */
acpi_status lis3lv02d_acpi_init(acpi_handle handle)
{
	return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL);
}

/**
 * lis3lv02d_acpi_read - ACPI ALRD method: read a register
 * @handle: the handle of the device
 * @reg:    the register to read
 * @ret:    result of the operation
 *
 * Returns AE_OK on success.
 */
acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret)
{
	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	struct acpi_object_list args = { 1, &arg0 };
	unsigned long long lret;
	acpi_status status;

	arg0.integer.value = reg;

	status = acpi_evaluate_integer(handle, "ALRD", &args, &lret);
	*ret = lret;
	return status;
}

/**
 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
 * @handle: the handle of the device
 * @reg:    the register to write to
 * @val:    the value to write
 *
 * Returns AE_OK on success.
 */
acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val)
{
	unsigned long long ret; /* Not used when writting */
	union acpi_object in_obj[2];
	struct acpi_object_list args = { 2, in_obj };

	in_obj[0].type          = ACPI_TYPE_INTEGER;
	in_obj[0].integer.value = reg;
	in_obj[1].type          = ACPI_TYPE_INTEGER;
	in_obj[1].integer.value = val;

	return acpi_evaluate_integer(handle, "ALWR", &args, &ret);
}

static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
{
	adev.ac = *((struct axis_conversion *)dmi->driver_data);
	printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident);

	return 1;
}

/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
 * If the value is negative, the opposite of the hw value is used. */
static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3};

#define AXIS_DMI_MATCH(_ident, _name, _axis) {		\
	.ident = _ident,				\
	.callback = lis3lv02d_dmi_matched,		\
	.matches = {					\
		DMI_MATCH(DMI_PRODUCT_NAME, _name)	\
	},						\
	.driver_data = &lis3lv02d_axis_##_axis		\
}
static struct dmi_system_id lis3lv02d_dmi_ids[] = {
	/* product names are truncated to match all kinds of a same model */
	AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
	AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
	AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
	AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
	AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
	AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
	AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
	{ NULL, }
/* Laptop models without axis info (yet):
 * "NC651xx" "HP Compaq 651"
 * "NC671xx" "HP Compaq 671"
 * "NC6910" "HP Compaq 6910"
 * HP Compaq 8710x Notebook PC / Mobile Workstation
 * "NC2400" "HP Compaq nc2400"
 * "NX74x0" "HP Compaq nx74"
 * "NX6325" "HP Compaq nx6325"
 * "NC4400" "HP Compaq nc4400"
 */
};


static int lis3lv02d_add(struct acpi_device *device)
{
	u8 val;

	if (!device)
		return -EINVAL;

	adev.device = device;
	adev.init = lis3lv02d_acpi_init;
	adev.read = lis3lv02d_acpi_read;
	adev.write = lis3lv02d_acpi_write;
	strcpy(acpi_device_name(device), DRIVER_NAME);
	strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
	device->driver_data = &adev;

	lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val);
	if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) {
		printk(KERN_ERR DRIVER_NAME
				": Accelerometer chip not LIS3LV02D{L,Q}\n");
	}

	/* If possible use a "standard" axes order */
	if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
		printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
				 "using default axes configuration\n");
		adev.ac = lis3lv02d_axis_normal;
	}

	return lis3lv02d_init_device(&adev);
}

static int lis3lv02d_remove(struct acpi_device *device, int type)
{
	if (!device)
		return -EINVAL;

	lis3lv02d_joystick_disable();
	lis3lv02d_poweroff(device->handle);

	return lis3lv02d_remove_fs();
}


#ifdef CONFIG_PM
static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
{
	/* make sure the device is off when we suspend */
	lis3lv02d_poweroff(device->handle);
	return 0;
}

static int lis3lv02d_resume(struct acpi_device *device)
{
	/* put back the device in the right state (ACPI might turn it on) */
	mutex_lock(&adev.lock);
	if (adev.usage > 0)
		lis3lv02d_poweron(device->handle);
	else
		lis3lv02d_poweroff(device->handle);
	mutex_unlock(&adev.lock);
	return 0;
}
#else
#define lis3lv02d_suspend NULL
#define lis3lv02d_resume NULL
#endif

/* For the HP MDPS aka 3D Driveguard */
static struct acpi_driver lis3lv02d_driver = {
	.name  = DRIVER_NAME,
	.class = ACPI_MDPS_CLASS,
	.ids   = lis3lv02d_device_ids,
	.ops = {
		.add     = lis3lv02d_add,
		.remove  = lis3lv02d_remove,
		.suspend = lis3lv02d_suspend,
		.resume  = lis3lv02d_resume,
	}
};

static int __init lis3lv02d_init_module(void)
{
	int ret;

	if (acpi_disabled)
		return -ENODEV;

	ret = acpi_bus_register_driver(&lis3lv02d_driver);
	if (ret < 0)
		return ret;

	printk(KERN_INFO DRIVER_NAME " driver loaded.\n");

	return 0;
}

static void __exit lis3lv02d_exit_module(void)
{
	acpi_bus_unregister_driver(&lis3lv02d_driver);
}

MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS");
MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
MODULE_LICENSE("GPL");

module_init(lis3lv02d_init_module);
module_exit(lis3lv02d_exit_module);
Commit	Line	Data
cfce41a6 EP	1	/*
	2	* hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
	3	*
	4	* Copyright (C) 2007-2008 Yan Burman
	5	* Copyright (C) 2008 Eric Piel
	6	* Copyright (C) 2008 Pavel Machek
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*/
	22
	23	#include <linux/kernel.h>
	24	#include <linux/init.h>
	25	#include <linux/dmi.h>
	26	#include <linux/module.h>
	27	#include <linux/types.h>
	28	#include <linux/platform_device.h>
	29	#include <linux/interrupt.h>
	30	#include <linux/input.h>
	31	#include <linux/kthread.h>
	32	#include <linux/semaphore.h>
	33	#include <linux/delay.h>
	34	#include <linux/wait.h>
	35	#include <linux/poll.h>
	36	#include <linux/freezer.h>
	37	#include <linux/version.h>
	38	#include <linux/uaccess.h>
	39	#include <acpi/acpi_drivers.h>
	40	#include <asm/atomic.h>
	41	#include "lis3lv02d.h"
	42
	43	#define DRIVER_NAME "lis3lv02d"
	44	#define ACPI_MDPS_CLASS "accelerometer"
	45
	46
	47	/* For automatic insertion of the module */
	48	static struct acpi_device_id lis3lv02d_device_ids[] = {
	49	{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
	50	{"", 0},
	51	};
	52	MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
	53
	54
	55	/**
	56	* lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
	57	* @handle: the handle of the device
	58	*
	59	* Returns AE_OK on success.
	60	*/
	61	acpi_status lis3lv02d_acpi_init(acpi_handle handle)
	62	{
	63	return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL);
	64	}
65
66	/**
67	* lis3lv02d_acpi_read - ACPI ALRD method: read a register
68	* @handle: the handle of the device
69	* @reg: the register to read
70	* @ret: result of the operation
71	*
72	* Returns AE_OK on success.
73	*/
74	acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret)
75	{
76	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
77	struct acpi_object_list args = { 1, &arg0 };
78	unsigned long long lret;
79	acpi_status status;
80
81	arg0.integer.value = reg;
82
83	status = acpi_evaluate_integer(handle, "ALRD", &args, &lret);
84	*ret = lret;
85	return status;
86	}
87
88	/**
89	* lis3lv02d_acpi_write - ACPI ALWR method: write to a register
90	* @handle: the handle of the device
91	* @reg: the register to write to
92	* @val: the value to write
93	*
94	* Returns AE_OK on success.
95	*/
96	acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val)
97	{
98	unsigned long long ret; /* Not used when writting */
99	union acpi_object in_obj[2];
100	struct acpi_object_list args = { 2, in_obj };
101
102	in_obj[0].type = ACPI_TYPE_INTEGER;
103	in_obj[0].integer.value = reg;
104	in_obj[1].type = ACPI_TYPE_INTEGER;
105	in_obj[1].integer.value = val;
106
107	return acpi_evaluate_integer(handle, "ALWR", &args, &ret);
108	}
109
110	static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
111	{
112	adev.ac = ((struct axis_conversion )dmi->driver_data);
113	printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident);
114
115	return 1;
116	}
117
118	/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
119	* If the value is negative, the opposite of the hw value is used. */
120	static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
121	static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
122	static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
123	static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
124	static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
125	static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3};
126
127	#define AXIS_DMI_MATCH(_ident, _name, _axis) { \
128	.ident = _ident, \
129	.callback = lis3lv02d_dmi_matched, \
130	.matches = { \
131	DMI_MATCH(DMI_PRODUCT_NAME, _name) \
132	}, \
133	.driver_data = &lis3lv02d_axis_##_axis \
134	}
135	static struct dmi_system_id lis3lv02d_dmi_ids[] = {
136	/* product names are truncated to match all kinds of a same model */
137	AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
138	AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
139	AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
140	AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
141	AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
142	AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
143	AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
144	{ NULL, }
145	/* Laptop models without axis info (yet):
146	* "NC651xx" "HP Compaq 651"
147	* "NC671xx" "HP Compaq 671"
148	* "NC6910" "HP Compaq 6910"
149	* HP Compaq 8710x Notebook PC / Mobile Workstation
150	* "NC2400" "HP Compaq nc2400"
151	* "NX74x0" "HP Compaq nx74"
152	* "NX6325" "HP Compaq nx6325"
153	* "NC4400" "HP Compaq nc4400"
154	*/
155	};
156
157
158	static int lis3lv02d_add(struct acpi_device *device)
159	{
160	u8 val;
161
162	if (!device)
163	return -EINVAL;
164
165	adev.device = device;
166	adev.init = lis3lv02d_acpi_init;
167	adev.read = lis3lv02d_acpi_read;
168	adev.write = lis3lv02d_acpi_write;
169	strcpy(acpi_device_name(device), DRIVER_NAME);
170	strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
171	device->driver_data = &adev;
172
173	lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val);
174	if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) {
175	printk(KERN_ERR DRIVER_NAME
176	": Accelerometer chip not LIS3LV02D{L,Q}\n");
177	}
178
179	/* If possible use a "standard" axes order */
180	if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
181	printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
182	"using default axes configuration\n");
183	adev.ac = lis3lv02d_axis_normal;
184	}
185
186	return lis3lv02d_init_device(&adev);
187	}
188
189	static int lis3lv02d_remove(struct acpi_device *device, int type)
190	{
191	if (!device)
192	return -EINVAL;
193
194	lis3lv02d_joystick_disable();
195	lis3lv02d_poweroff(device->handle);
196
197	return lis3lv02d_remove_fs();
198	}
199
200
201	#ifdef CONFIG_PM
202	static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
203	{
204	/* make sure the device is off when we suspend */
205	lis3lv02d_poweroff(device->handle);
206	return 0;
207	}
208
209	static int lis3lv02d_resume(struct acpi_device *device)
210	{
211	/* put back the device in the right state (ACPI might turn it on) */
212	mutex_lock(&adev.lock);
213	if (adev.usage > 0)
214	lis3lv02d_poweron(device->handle);
215	else
216	lis3lv02d_poweroff(device->handle);
217	mutex_unlock(&adev.lock);
218	return 0;
219	}
220	#else
221	#define lis3lv02d_suspend NULL
222	#define lis3lv02d_resume NULL
223	#endif
224
225	/* For the HP MDPS aka 3D Driveguard */
226	static struct acpi_driver lis3lv02d_driver = {
227	.name = DRIVER_NAME,
228	.class = ACPI_MDPS_CLASS,
229	.ids = lis3lv02d_device_ids,
230	.ops = {
231	.add = lis3lv02d_add,
232	.remove = lis3lv02d_remove,
233	.suspend = lis3lv02d_suspend,
234	.resume = lis3lv02d_resume,
235	}
236	};
237
238	static int __init lis3lv02d_init_module(void)
239	{
240	int ret;
241
242	if (acpi_disabled)
243	return -ENODEV;
244
245	ret = acpi_bus_register_driver(&lis3lv02d_driver);
246	if (ret < 0)
247	return ret;
248
249	printk(KERN_INFO DRIVER_NAME " driver loaded.\n");
250
251	return 0;
252	}
253
254	static void __exit lis3lv02d_exit_module(void)
255	{
256	acpi_bus_unregister_driver(&lis3lv02d_driver);
257	}
258
259	MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS");
260	MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
261	MODULE_LICENSE("GPL");
262
263	module_init(lis3lv02d_init_module);
264	module_exit(lis3lv02d_exit_module);
265