[deliverable/linux.git] / drivers / platform / x86 / chromeos_laptop.c

/*
 *  chromeos_laptop.c - Driver to instantiate Chromebook i2c/smbus devices.
 *
 *  Author : Benson Leung <bleung@chromium.org>
 *
 *  Copyright (C) 2012 Google, Inc.
 *
 *  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/dmi.h>
#include <linux/i2c.h>
#include <linux/module.h>

#define ATMEL_TP_I2C_ADDR	0x4b
#define ATMEL_TP_I2C_BL_ADDR	0x25
#define CYAPA_TP_I2C_ADDR	0x67
#define ISL_ALS_I2C_ADDR	0x44
#define TAOS_ALS_I2C_ADDR	0x29

static struct i2c_client *als;
static struct i2c_client *tp;

const char *i2c_adapter_names[] = {
	"SMBus I801 adapter",
};

/* Keep this enum consistent with i2c_adapter_names */
enum i2c_adapter_type {
	I2C_ADAPTER_SMBUS = 0,
};

static struct i2c_board_info __initdata cyapa_device = {
	I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
	.flags		= I2C_CLIENT_WAKE,
};

static struct i2c_board_info __initdata isl_als_device = {
	I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
};

static struct i2c_board_info __initdata tsl2583_als_device = {
	I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
};

static struct i2c_board_info __initdata tsl2563_als_device = {
	I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
};

static struct i2c_board_info __initdata atmel_224s_tp_device = {
	I2C_BOARD_INFO("atmel_mxt_tp", ATMEL_TP_I2C_ADDR),
	.platform_data = NULL,
	.flags		= I2C_CLIENT_WAKE,
};

static struct i2c_client __init *__add_probed_i2c_device(
		const char *name,
		int bus,
		struct i2c_board_info *info,
		const unsigned short *addrs)
{
	const struct dmi_device *dmi_dev;
	const struct dmi_dev_onboard *dev_data;
	struct i2c_adapter *adapter;
	struct i2c_client *client;

	if (bus < 0)
		return NULL;
	/*
	 * If a name is specified, look for irq platform information stashed
	 * in DMI_DEV_TYPE_DEV_ONBOARD by the Chrome OS custom system firmware.
	 */
	if (name) {
		dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, name, NULL);
		if (!dmi_dev) {
			pr_err("%s failed to dmi find device %s.\n",
			       __func__,
			       name);
			return NULL;
		}
		dev_data = (struct dmi_dev_onboard *)dmi_dev->device_data;
		if (!dev_data) {
			pr_err("%s failed to get data from dmi for %s.\n",
			       __func__, name);
			return NULL;
		}
		info->irq = dev_data->instance;
	}

	adapter = i2c_get_adapter(bus);
	if (!adapter) {
		pr_err("%s failed to get i2c adapter %d.\n", __func__, bus);
		return NULL;
	}

	/* add the i2c device */
	client = i2c_new_probed_device(adapter, info, addrs, NULL);
	if (!client)
		pr_err("%s failed to register device %d-%02x\n",
		       __func__, bus, info->addr);
	else
		pr_debug("%s added i2c device %d-%02x\n",
			 __func__, bus, info->addr);

	i2c_put_adapter(adapter);
	return client;
}

static int __init __find_i2c_adap(struct device *dev, void *data)
{
	const char *name = data;
	static const char *prefix = "i2c-";
	struct i2c_adapter *adapter;
	if (strncmp(dev_name(dev), prefix, strlen(prefix)) != 0)
		return 0;
	adapter = to_i2c_adapter(dev);
	return (strncmp(adapter->name, name, strlen(name)) == 0);
}

static int __init find_i2c_adapter_num(enum i2c_adapter_type type)
{
	struct device *dev = NULL;
	struct i2c_adapter *adapter;
	const char *name = i2c_adapter_names[type];
	/* find the adapter by name */
	dev = bus_find_device(&i2c_bus_type, NULL, (void *)name,
			      __find_i2c_adap);
	if (!dev) {
		pr_err("%s: i2c adapter %s not found on system.\n", __func__,
		       name);
		return -ENODEV;
	}
	adapter = to_i2c_adapter(dev);
	return adapter->nr;
}

/*
 * Takes a list of addresses in addrs as such :
 * { addr1, ... , addrn, I2C_CLIENT_END };
 * add_probed_i2c_device will use i2c_new_probed_device
 * and probe for devices at all of the addresses listed.
 * Returns NULL if no devices found.
 * See Documentation/i2c/instantiating-devices for more information.
 */
static __init struct i2c_client *add_probed_i2c_device(
		const char *name,
		enum i2c_adapter_type type,
		struct i2c_board_info *info,
		const unsigned short *addrs)
{
	return __add_probed_i2c_device(name,
				       find_i2c_adapter_num(type),
				       info,
				       addrs);
}

/*
 * Probes for a device at a single address, the one provided by
 * info->addr.
 * Returns NULL if no device found.
 */
static struct i2c_client __init *add_smbus_device(const char *name,
						  struct i2c_board_info *info)
{
	const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END };
	return __add_probed_i2c_device(name,
				       find_i2c_adapter_num(I2C_ADAPTER_SMBUS),
				       info,
				       addr_list);
}

static int __init setup_cyapa_smbus_tp(const struct dmi_system_id *id)
{
	/* add cyapa touchpad on smbus */
	tp = add_smbus_device("trackpad", &cyapa_device);
	return 0;
}

static int __init setup_atmel_224s_tp(const struct dmi_system_id *id)
{
	const unsigned short addr_list[] = { ATMEL_TP_I2C_BL_ADDR,
					     ATMEL_TP_I2C_ADDR,
					     I2C_CLIENT_END };

	/* add atmel mxt touchpad on VGA DDC GMBus */
	tp = add_probed_i2c_device("trackpad", I2C_ADAPTER_VGADDC,
				   &atmel_224s_tp_device, addr_list);
	return 0;
}


static int __init setup_isl29018_als(const struct dmi_system_id *id)
{
	/* add isl29018 light sensor */
	als = add_smbus_device("lightsensor", &isl_als_device);
	return 0;
}

static int __init setup_tsl2583_als(const struct dmi_system_id *id)
{
	/* add tsl2583 light sensor on smbus */
	als = add_smbus_device(NULL, &tsl2583_als_device);
	return 0;
}

static int __init setup_tsl2563_als(const struct dmi_system_id *id)
{
	/* add tsl2563 light sensor on smbus */
	als = add_smbus_device(NULL, &tsl2563_als_device);
	return 0;
}

static struct dmi_system_id __initdata chromeos_laptop_dmi_table[] = {
	{
		.ident = "Samsung Series 5 550 - Touchpad",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
		},
		.callback = setup_cyapa_smbus_tp,
	},
	{
		.ident = "Chromebook Pixel - Touchpad",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
		},
		.callback = setup_atmel_224s_tp,
	},
	{
		.ident = "Samsung Series 5 550 - Light Sensor",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
		},
		.callback = setup_isl29018_als,
	},
	{
		.ident = "Acer C7 Chromebook - Touchpad",
		.matches = {
			DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
		},
		.callback = setup_cyapa_smbus_tp,
	},
	{
		.ident = "HP Pavilion 14 Chromebook - Touchpad",
		.matches = {
			DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
		},
		.callback = setup_cyapa_smbus_tp,
	},
	{
		.ident = "Samsung Series 5 - Light Sensor",
		.matches = {
			DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
		},
		.callback = setup_tsl2583_als,
	},
	{
		.ident = "Cr-48 - Light Sensor",
		.matches = {
			DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
		},
		.callback = setup_tsl2563_als,
	},
	{
		.ident = "Acer AC700 - Light Sensor",
		.matches = {
			DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
		},
		.callback = setup_tsl2563_als,
	},
	{ }
};
MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);

static int __init chromeos_laptop_init(void)
{
	if (!dmi_check_system(chromeos_laptop_dmi_table)) {
		pr_debug("%s unsupported system.\n", __func__);
		return -ENODEV;
	}
	return 0;
}

static void __exit chromeos_laptop_exit(void)
{
	if (als)
		i2c_unregister_device(als);
	if (tp)
		i2c_unregister_device(tp);
}

module_init(chromeos_laptop_init);
module_exit(chromeos_laptop_exit);

MODULE_DESCRIPTION("Chrome OS Laptop driver");
MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
MODULE_LICENSE("GPL");
Commit	Line	Data
d1381f45 BL	1	/*
	2	* chromeos_laptop.c - Driver to instantiate Chromebook i2c/smbus devices.
	3	*
	4	* Author : Benson Leung <bleung@chromium.org>
	5	*
	6	* Copyright (C) 2012 Google, Inc.
	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
	24	#include <linux/dmi.h>
	25	#include <linux/i2c.h>
	26	#include <linux/module.h>
	27
8e1ad4c4 BL	28	#define ATMEL_TP_I2C_ADDR 0x4b
8e1ad4c4 BL	29	#define ATMEL_TP_I2C_BL_ADDR 0x25
d1381f45 BL	30	#define CYAPA_TP_I2C_ADDR 0x67
d1381f45 BL	31	#define ISL_ALS_I2C_ADDR 0x44
aabf3f44	32	#define TAOS_ALS_I2C_ADDR 0x29
d1381f45 BL	33
	34	static struct i2c_client *als;
	35	static struct i2c_client *tp;
	36
	37	const char *i2c_adapter_names[] = {
	38	"SMBus I801 adapter",
	39	};
	40
	41	/* Keep this enum consistent with i2c_adapter_names */
	42	enum i2c_adapter_type {
	43	I2C_ADAPTER_SMBUS = 0,
	44	};
	45
	46	static struct i2c_board_info __initdata cyapa_device = {
	47	I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
	48	.flags = I2C_CLIENT_WAKE,
	49	};
	50
	51	static struct i2c_board_info __initdata isl_als_device = {
	52	I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
	53	};
	54
8016bcbc BL	55	static struct i2c_board_info __initdata tsl2583_als_device = {
	56	I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
	57	};
	58
aabf3f44 BL	59	static struct i2c_board_info __initdata tsl2563_als_device = {
	60	I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
	61	};
	62
8e1ad4c4 BL	63	static struct i2c_board_info __initdata atmel_224s_tp_device = {
	64	I2C_BOARD_INFO("atmel_mxt_tp", ATMEL_TP_I2C_ADDR),
	65	.platform_data = NULL,
	66	.flags = I2C_CLIENT_WAKE,
	67	};
	68
d1381f45 BL	69	static struct i2c_client __init *__add_probed_i2c_device(
	70	const char *name,
	71	int bus,
	72	struct i2c_board_info *info,
	73	const unsigned short *addrs)
	74	{
	75	const struct dmi_device *dmi_dev;
	76	const struct dmi_dev_onboard *dev_data;
	77	struct i2c_adapter *adapter;
	78	struct i2c_client *client;
	79
	80	if (bus < 0)
	81	return NULL;
	82	/*
	83	* If a name is specified, look for irq platform information stashed
	84	* in DMI_DEV_TYPE_DEV_ONBOARD by the Chrome OS custom system firmware.
	85	*/
	86	if (name) {
	87	dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, name, NULL);
	88	if (!dmi_dev) {
	89	pr_err("%s failed to dmi find device %s.\n",
	90	__func__,
	91	name);
	92	return NULL;
	93	}
	94	dev_data = (struct dmi_dev_onboard *)dmi_dev->device_data;
	95	if (!dev_data) {
	96	pr_err("%s failed to get data from dmi for %s.\n",
	97	__func__, name);
	98	return NULL;
	99	}
	100	info->irq = dev_data->instance;
	101	}
	102
	103	adapter = i2c_get_adapter(bus);
	104	if (!adapter) {
	105	pr_err("%s failed to get i2c adapter %d.\n", __func__, bus);
	106	return NULL;
	107	}
	108
	109	/* add the i2c device */
	110	client = i2c_new_probed_device(adapter, info, addrs, NULL);
	111	if (!client)
	112	pr_err("%s failed to register device %d-%02x\n",
	113	__func__, bus, info->addr);
	114	else
	115	pr_debug("%s added i2c device %d-%02x\n",
	116	__func__, bus, info->addr);
	117
	118	i2c_put_adapter(adapter);
	119	return client;
	120	}
	121
	122	static int __init __find_i2c_adap(struct device dev, void data)
	123	{
	124	const char *name = data;
	125	static const char *prefix = "i2c-";
	126	struct i2c_adapter *adapter;
	127	if (strncmp(dev_name(dev), prefix, strlen(prefix)) != 0)
	128	return 0;
	129	adapter = to_i2c_adapter(dev);
	130	return (strncmp(adapter->name, name, strlen(name)) == 0);
	131	}
	132
133	static int __init find_i2c_adapter_num(enum i2c_adapter_type type)
134	{
135	struct device *dev = NULL;
136	struct i2c_adapter *adapter;
137	const char *name = i2c_adapter_names[type];
138	/* find the adapter by name */
139	dev = bus_find_device(&i2c_bus_type, NULL, (void *)name,
140	__find_i2c_adap);
141	if (!dev) {
142	pr_err("%s: i2c adapter %s not found on system.\n", __func__,
143	name);
144	return -ENODEV;
145	}
146	adapter = to_i2c_adapter(dev);
147	return adapter->nr;
148	}
149
bcaf089c BL	150	/*
	151	* Takes a list of addresses in addrs as such :
	152	* { addr1, ... , addrn, I2C_CLIENT_END };
	153	* add_probed_i2c_device will use i2c_new_probed_device
	154	* and probe for devices at all of the addresses listed.
	155	* Returns NULL if no devices found.
	156	* See Documentation/i2c/instantiating-devices for more information.
	157	*/
	158	static __init struct i2c_client *add_probed_i2c_device(
	159	const char *name,
	160	enum i2c_adapter_type type,
	161	struct i2c_board_info *info,
	162	const unsigned short *addrs)
	163	{
	164	return __add_probed_i2c_device(name,
	165	find_i2c_adapter_num(type),
	166	info,
	167	addrs);
	168	}
	169
d1381f45 BL	170	/*
	171	* Probes for a device at a single address, the one provided by
	172	* info->addr.
	173	* Returns NULL if no device found.
	174	*/
	175	static struct i2c_client __init add_smbus_device(const char name,
	176	struct i2c_board_info *info)
	177	{
	178	const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END };
	179	return __add_probed_i2c_device(name,
	180	find_i2c_adapter_num(I2C_ADAPTER_SMBUS),
	181	info,
	182	addr_list);
	183	}
	184
6e71094d	185	static int __init setup_cyapa_smbus_tp(const struct dmi_system_id *id)
d1381f45 BL	186	{
	187	/* add cyapa touchpad on smbus */
	188	tp = add_smbus_device("trackpad", &cyapa_device);
	189	return 0;
	190	}
	191
8e1ad4c4 BL	192	static int __init setup_atmel_224s_tp(const struct dmi_system_id *id)
	193	{
	194	const unsigned short addr_list[] = { ATMEL_TP_I2C_BL_ADDR,
	195	ATMEL_TP_I2C_ADDR,
	196	I2C_CLIENT_END };
	197
	198	/* add atmel mxt touchpad on VGA DDC GMBus */
	199	tp = add_probed_i2c_device("trackpad", I2C_ADAPTER_VGADDC,
	200	&atmel_224s_tp_device, addr_list);
	201	return 0;
	202	}
	203
	204
d1381f45 BL	205	static int __init setup_isl29018_als(const struct dmi_system_id *id)
	206	{
	207	/* add isl29018 light sensor */
	208	als = add_smbus_device("lightsensor", &isl_als_device);
	209	return 0;
	210	}
	211
8016bcbc BL	212	static int __init setup_tsl2583_als(const struct dmi_system_id *id)
	213	{
	214	/* add tsl2583 light sensor on smbus */
	215	als = add_smbus_device(NULL, &tsl2583_als_device);
	216	return 0;
	217	}
	218
aabf3f44 BL	219	static int __init setup_tsl2563_als(const struct dmi_system_id *id)
	220	{
	221	/* add tsl2563 light sensor on smbus */
	222	als = add_smbus_device(NULL, &tsl2563_als_device);
	223	return 0;
	224	}
	225
d1381f45 BL	226	static struct dmi_system_id __initdata chromeos_laptop_dmi_table[] = {
	227	{
	228	.ident = "Samsung Series 5 550 - Touchpad",
	229	.matches = {
	230	DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
	231	DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
	232	},
6e71094d	233	.callback = setup_cyapa_smbus_tp,
d1381f45	234	},
8e1ad4c4 BL	235	{
	236	.ident = "Chromebook Pixel - Touchpad",
	237	.matches = {
	238	DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
	239	DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
	240	},
	241	.callback = setup_atmel_224s_tp,
	242	},
d1381f45 BL	243	{
	244	.ident = "Samsung Series 5 550 - Light Sensor",
	245	.matches = {
	246	DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
	247	DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
	248	},
	249	.callback = setup_isl29018_als,
	250	},
261f171f BL	251	{
	252	.ident = "Acer C7 Chromebook - Touchpad",
	253	.matches = {
	254	DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
	255	},
	256	.callback = setup_cyapa_smbus_tp,
e65a624b BL	257	},
	258	{
	259	.ident = "HP Pavilion 14 Chromebook - Touchpad",
	260	.matches = {
	261	DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
	262	},
	263	.callback = setup_cyapa_smbus_tp,
261f171f	264	},
8016bcbc BL	265	{
	266	.ident = "Samsung Series 5 - Light Sensor",
	267	.matches = {
	268	DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
	269	},
	270	.callback = setup_tsl2583_als,
	271	},
aabf3f44 BL	272	{
	273	.ident = "Cr-48 - Light Sensor",
	274	.matches = {
	275	DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
	276	},
	277	.callback = setup_tsl2563_als,
	278	},
	279	{
	280	.ident = "Acer AC700 - Light Sensor",
	281	.matches = {
	282	DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
	283	},
	284	.callback = setup_tsl2563_als,
	285	},
d1381f45 BL	286	{ }
	287	};
	288	MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);
	289
	290	static int __init chromeos_laptop_init(void)
	291	{
	292	if (!dmi_check_system(chromeos_laptop_dmi_table)) {
	293	pr_debug("%s unsupported system.\n", __func__);
	294	return -ENODEV;
	295	}
	296	return 0;
	297	}
	298
	299	static void __exit chromeos_laptop_exit(void)
	300	{
	301	if (als)
	302	i2c_unregister_device(als);
	303	if (tp)
	304	i2c_unregister_device(tp);
	305	}
	306
	307	module_init(chromeos_laptop_init);
	308	module_exit(chromeos_laptop_exit);
	309
	310	MODULE_DESCRIPTION("Chrome OS Laptop driver");
	311	MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
	312	MODULE_LICENSE("GPL");