[linux-block.git] / drivers / media / video / adv7180.c

/*
 * adv7180.c Analog Devices ADV7180 video decoder driver
 * Copyright (c) 2009 Intel Corporation
 *
 * 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.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <media/v4l2-ioctl.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>

#define DRIVER_NAME "adv7180"

#define ADV7180_INPUT_CONTROL_REG	0x00
#define ADV7180_INPUT_CONTROL_PAL_BG_NTSC_J_SECAM	0x00
#define ADV7180_AUTODETECT_ENABLE_REG	0x07
#define ADV7180_AUTODETECT_DEFAULT	0x7f


#define ADV7180_STATUS1_REG 0x10
#define ADV7180_STATUS1_AUTOD_MASK 0x70
#define ADV7180_STATUS1_AUTOD_NTSM_M_J	0x00
#define ADV7180_STATUS1_AUTOD_NTSC_4_43 0x10
#define ADV7180_STATUS1_AUTOD_PAL_M	0x20
#define ADV7180_STATUS1_AUTOD_PAL_60	0x30
#define ADV7180_STATUS1_AUTOD_PAL_B_G	0x40
#define ADV7180_STATUS1_AUTOD_SECAM	0x50
#define ADV7180_STATUS1_AUTOD_PAL_COMB	0x60
#define ADV7180_STATUS1_AUTOD_SECAM_525	0x70

#define ADV7180_IDENT_REG 0x11
#define ADV7180_ID_7180 0x18


struct adv7180_state {
	struct v4l2_subdev sd;
};

static v4l2_std_id determine_norm(struct i2c_client *client)
{
	u8 status1 = i2c_smbus_read_byte_data(client, ADV7180_STATUS1_REG);

	switch (status1 & ADV7180_STATUS1_AUTOD_MASK) {
	case ADV7180_STATUS1_AUTOD_NTSM_M_J:
		return V4L2_STD_NTSC_M_JP;
	case ADV7180_STATUS1_AUTOD_NTSC_4_43:
		return V4L2_STD_NTSC_443;
	case ADV7180_STATUS1_AUTOD_PAL_M:
		return V4L2_STD_PAL_M;
	case ADV7180_STATUS1_AUTOD_PAL_60:
		return V4L2_STD_PAL_60;
	case ADV7180_STATUS1_AUTOD_PAL_B_G:
		return V4L2_STD_PAL;
	case ADV7180_STATUS1_AUTOD_SECAM:
		return V4L2_STD_SECAM;
	case ADV7180_STATUS1_AUTOD_PAL_COMB:
		return V4L2_STD_PAL_Nc | V4L2_STD_PAL_N;
	case ADV7180_STATUS1_AUTOD_SECAM_525:
		return V4L2_STD_SECAM;
	default:
		return V4L2_STD_UNKNOWN;
	}
}

static inline struct adv7180_state *to_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct adv7180_state, sd);
}

static int adv7180_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	*std = determine_norm(client);
	return 0;
}

static int adv7180_g_chip_ident(struct v4l2_subdev *sd,
	struct v4l2_dbg_chip_ident *chip)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7180, 0);
}

static const struct v4l2_subdev_video_ops adv7180_video_ops = {
	.querystd = adv7180_querystd,
};

static const struct v4l2_subdev_core_ops adv7180_core_ops = {
	.g_chip_ident = adv7180_g_chip_ident,
};

static const struct v4l2_subdev_ops adv7180_ops = {
	.core = &adv7180_core_ops,
	.video = &adv7180_video_ops,
};

/*
 * Generic i2c probe
 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 */

static int adv7180_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct adv7180_state *state;
	struct v4l2_subdev *sd;
	int ret;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

	v4l_info(client, "chip found @ 0x%02x (%s)\n",
			client->addr << 1, client->adapter->name);

	state = kzalloc(sizeof(struct adv7180_state), GFP_KERNEL);
	if (state == NULL)
		return -ENOMEM;
	sd = &state->sd;
	v4l2_i2c_subdev_init(sd, client, &adv7180_ops);

	/* Initialize adv7180 */
	/* enable autodetection */
	ret = i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG,
		ADV7180_INPUT_CONTROL_PAL_BG_NTSC_J_SECAM);
	if (ret > 0)
		ret = i2c_smbus_write_byte_data(client,
			ADV7180_AUTODETECT_ENABLE_REG,
			ADV7180_AUTODETECT_DEFAULT);
	if (ret < 0) {
		printk(KERN_ERR DRIVER_NAME
			": Failed to communicate to chip: %d\n", ret);
		return ret;
	}

	return 0;
}

static int adv7180_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

	v4l2_device_unregister_subdev(sd);
	kfree(to_state(sd));
	return 0;
}

static const struct i2c_device_id adv7180_id[] = {
	{DRIVER_NAME, 0},
	{},
};

MODULE_DEVICE_TABLE(i2c, adv7180_id);

static struct i2c_driver adv7180_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= DRIVER_NAME,
	},
	.probe		= adv7180_probe,
	.remove		= adv7180_remove,
	.id_table	= adv7180_id,
};

static __init int adv7180_init(void)
{
	return i2c_add_driver(&adv7180_driver);
}

static __exit void adv7180_exit(void)
{
	i2c_del_driver(&adv7180_driver);
}

module_init(adv7180_init);
module_exit(adv7180_exit);

MODULE_DESCRIPTION("Analog Devices ADV7180 video decoder driver");
MODULE_AUTHOR("Mocean Laboratories");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
6789cb52 RR	1	/*
	2	* adv7180.c Analog Devices ADV7180 video decoder driver
	3	* Copyright (c) 2009 Intel Corporation
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/init.h>
	21	#include <linux/errno.h>
	22	#include <linux/kernel.h>
	23	#include <linux/interrupt.h>
	24	#include <linux/i2c.h>
	25	#include <linux/i2c-id.h>
	26	#include <media/v4l2-ioctl.h>
	27	#include <linux/videodev2.h>
	28	#include <media/v4l2-device.h>
	29	#include <media/v4l2-chip-ident.h>
	30
	31	#define DRIVER_NAME "adv7180"
	32
	33	#define ADV7180_INPUT_CONTROL_REG 0x00
	34	#define ADV7180_INPUT_CONTROL_PAL_BG_NTSC_J_SECAM 0x00
	35	#define ADV7180_AUTODETECT_ENABLE_REG 0x07
	36	#define ADV7180_AUTODETECT_DEFAULT 0x7f
	37
	38
	39	#define ADV7180_STATUS1_REG 0x10
	40	#define ADV7180_STATUS1_AUTOD_MASK 0x70
	41	#define ADV7180_STATUS1_AUTOD_NTSM_M_J 0x00
	42	#define ADV7180_STATUS1_AUTOD_NTSC_4_43 0x10
	43	#define ADV7180_STATUS1_AUTOD_PAL_M 0x20
	44	#define ADV7180_STATUS1_AUTOD_PAL_60 0x30
	45	#define ADV7180_STATUS1_AUTOD_PAL_B_G 0x40
	46	#define ADV7180_STATUS1_AUTOD_SECAM 0x50
	47	#define ADV7180_STATUS1_AUTOD_PAL_COMB 0x60
	48	#define ADV7180_STATUS1_AUTOD_SECAM_525 0x70
	49
	50	#define ADV7180_IDENT_REG 0x11
	51	#define ADV7180_ID_7180 0x18
	52
	53
	54	struct adv7180_state {
	55	struct v4l2_subdev sd;
	56	};
	57
	58	static v4l2_std_id determine_norm(struct i2c_client *client)
	59	{
	60	u8 status1 = i2c_smbus_read_byte_data(client, ADV7180_STATUS1_REG);
	61
	62	switch (status1 & ADV7180_STATUS1_AUTOD_MASK) {
	63	case ADV7180_STATUS1_AUTOD_NTSM_M_J:
	64	return V4L2_STD_NTSC_M_JP;
65	case ADV7180_STATUS1_AUTOD_NTSC_4_43:
66	return V4L2_STD_NTSC_443;
67	case ADV7180_STATUS1_AUTOD_PAL_M:
68	return V4L2_STD_PAL_M;
69	case ADV7180_STATUS1_AUTOD_PAL_60:
70	return V4L2_STD_PAL_60;
71	case ADV7180_STATUS1_AUTOD_PAL_B_G:
72	return V4L2_STD_PAL;
73	case ADV7180_STATUS1_AUTOD_SECAM:
74	return V4L2_STD_SECAM;
75	case ADV7180_STATUS1_AUTOD_PAL_COMB:
76	return V4L2_STD_PAL_Nc \| V4L2_STD_PAL_N;
77	case ADV7180_STATUS1_AUTOD_SECAM_525:
78	return V4L2_STD_SECAM;
79	default:
80	return V4L2_STD_UNKNOWN;
81	}
82	}
83
84	static inline struct adv7180_state to_state(struct v4l2_subdev sd)
85	{
86	return container_of(sd, struct adv7180_state, sd);
87	}
88
89	static int adv7180_querystd(struct v4l2_subdev sd, v4l2_std_id std)
90	{
91	struct i2c_client *client = v4l2_get_subdevdata(sd);
92
93	*std = determine_norm(client);
94	return 0;
95	}
96
97	static int adv7180_g_chip_ident(struct v4l2_subdev *sd,
98	struct v4l2_dbg_chip_ident *chip)
99	{
100	struct i2c_client *client = v4l2_get_subdevdata(sd);
101
102	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7180, 0);
103	}
104
105	static const struct v4l2_subdev_video_ops adv7180_video_ops = {
106	.querystd = adv7180_querystd,
107	};
108
109	static const struct v4l2_subdev_core_ops adv7180_core_ops = {
110	.g_chip_ident = adv7180_g_chip_ident,
111	};
112
113	static const struct v4l2_subdev_ops adv7180_ops = {
114	.core = &adv7180_core_ops,
115	.video = &adv7180_video_ops,
116	};
117
118	/*
119	* Generic i2c probe
120	* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
121	*/
122
123	static int adv7180_probe(struct i2c_client *client,
124	const struct i2c_device_id *id)
125	{
126	struct adv7180_state *state;
127	struct v4l2_subdev *sd;
128	int ret;
129
130	/* Check if the adapter supports the needed features */
131	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
132	return -EIO;
133
134	v4l_info(client, "chip found @ 0x%02x (%s)\n",
135	client->addr << 1, client->adapter->name);
136
137	state = kzalloc(sizeof(struct adv7180_state), GFP_KERNEL);
138	if (state == NULL)
139	return -ENOMEM;
140	sd = &state->sd;
141	v4l2_i2c_subdev_init(sd, client, &adv7180_ops);
142
143	/* Initialize adv7180 */
144	/* enable autodetection */
145	ret = i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG,
146	ADV7180_INPUT_CONTROL_PAL_BG_NTSC_J_SECAM);
147	if (ret > 0)
148	ret = i2c_smbus_write_byte_data(client,
149	ADV7180_AUTODETECT_ENABLE_REG,
150	ADV7180_AUTODETECT_DEFAULT);
151	if (ret < 0) {
152	printk(KERN_ERR DRIVER_NAME
153	": Failed to communicate to chip: %d\n", ret);
154	return ret;
155	}
156
157	return 0;
158	}
159
160	static int adv7180_remove(struct i2c_client *client)
161	{
162	struct v4l2_subdev *sd = i2c_get_clientdata(client);
163
164	v4l2_device_unregister_subdev(sd);
165	kfree(to_state(sd));
166	return 0;
167	}
168
169	static const struct i2c_device_id adv7180_id[] = {
170	{DRIVER_NAME, 0},
171	{},
172	};
173
174	MODULE_DEVICE_TABLE(i2c, adv7180_id);
175
176	static struct i2c_driver adv7180_driver = {
177	.driver = {
178	.owner = THIS_MODULE,
179	.name = DRIVER_NAME,
180	},
181	.probe = adv7180_probe,
182	.remove = adv7180_remove,
183	.id_table = adv7180_id,
184	};
185
186	static __init int adv7180_init(void)
187	{
188	return i2c_add_driver(&adv7180_driver);
189	}
190
191	static __exit void adv7180_exit(void)
192	{
193	i2c_del_driver(&adv7180_driver);
194	}
195
196	module_init(adv7180_init);
197	module_exit(adv7180_exit);
198
199	MODULE_DESCRIPTION("Analog Devices ADV7180 video decoder driver");
200	MODULE_AUTHOR("Mocean Laboratories");
201	MODULE_LICENSE("GPL v2");
202