203 lines
5.2 KiB
C
203 lines
5.2 KiB
C
/*
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* adv7180.c Analog Devices ADV7180 video decoder driver
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* Copyright (c) 2009 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/i2c-id.h>
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#include <media/v4l2-ioctl.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-chip-ident.h>
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#define DRIVER_NAME "adv7180"
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#define ADV7180_INPUT_CONTROL_REG 0x00
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#define ADV7180_INPUT_CONTROL_PAL_BG_NTSC_J_SECAM 0x00
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#define ADV7180_AUTODETECT_ENABLE_REG 0x07
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#define ADV7180_AUTODETECT_DEFAULT 0x7f
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#define ADV7180_STATUS1_REG 0x10
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#define ADV7180_STATUS1_AUTOD_MASK 0x70
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#define ADV7180_STATUS1_AUTOD_NTSM_M_J 0x00
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#define ADV7180_STATUS1_AUTOD_NTSC_4_43 0x10
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#define ADV7180_STATUS1_AUTOD_PAL_M 0x20
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#define ADV7180_STATUS1_AUTOD_PAL_60 0x30
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#define ADV7180_STATUS1_AUTOD_PAL_B_G 0x40
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#define ADV7180_STATUS1_AUTOD_SECAM 0x50
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#define ADV7180_STATUS1_AUTOD_PAL_COMB 0x60
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#define ADV7180_STATUS1_AUTOD_SECAM_525 0x70
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#define ADV7180_IDENT_REG 0x11
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#define ADV7180_ID_7180 0x18
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struct adv7180_state {
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struct v4l2_subdev sd;
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};
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static v4l2_std_id determine_norm(struct i2c_client *client)
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{
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u8 status1 = i2c_smbus_read_byte_data(client, ADV7180_STATUS1_REG);
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switch (status1 & ADV7180_STATUS1_AUTOD_MASK) {
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case ADV7180_STATUS1_AUTOD_NTSM_M_J:
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return V4L2_STD_NTSC_M_JP;
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case ADV7180_STATUS1_AUTOD_NTSC_4_43:
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return V4L2_STD_NTSC_443;
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case ADV7180_STATUS1_AUTOD_PAL_M:
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return V4L2_STD_PAL_M;
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case ADV7180_STATUS1_AUTOD_PAL_60:
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return V4L2_STD_PAL_60;
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case ADV7180_STATUS1_AUTOD_PAL_B_G:
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return V4L2_STD_PAL;
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case ADV7180_STATUS1_AUTOD_SECAM:
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return V4L2_STD_SECAM;
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case ADV7180_STATUS1_AUTOD_PAL_COMB:
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return V4L2_STD_PAL_Nc | V4L2_STD_PAL_N;
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case ADV7180_STATUS1_AUTOD_SECAM_525:
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return V4L2_STD_SECAM;
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default:
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return V4L2_STD_UNKNOWN;
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}
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}
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static inline struct adv7180_state *to_state(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct adv7180_state, sd);
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}
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static int adv7180_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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*std = determine_norm(client);
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return 0;
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}
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static int adv7180_g_chip_ident(struct v4l2_subdev *sd,
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struct v4l2_dbg_chip_ident *chip)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7180, 0);
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}
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static const struct v4l2_subdev_video_ops adv7180_video_ops = {
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.querystd = adv7180_querystd,
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};
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static const struct v4l2_subdev_core_ops adv7180_core_ops = {
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.g_chip_ident = adv7180_g_chip_ident,
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};
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static const struct v4l2_subdev_ops adv7180_ops = {
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.core = &adv7180_core_ops,
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.video = &adv7180_video_ops,
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};
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/*
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* Generic i2c probe
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
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*/
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static int adv7180_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct adv7180_state *state;
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struct v4l2_subdev *sd;
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int ret;
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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v4l_info(client, "chip found @ 0x%02x (%s)\n",
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client->addr << 1, client->adapter->name);
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state = kzalloc(sizeof(struct adv7180_state), GFP_KERNEL);
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if (state == NULL)
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return -ENOMEM;
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sd = &state->sd;
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v4l2_i2c_subdev_init(sd, client, &adv7180_ops);
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/* Initialize adv7180 */
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/* enable autodetection */
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ret = i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG,
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ADV7180_INPUT_CONTROL_PAL_BG_NTSC_J_SECAM);
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if (ret > 0)
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ret = i2c_smbus_write_byte_data(client,
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ADV7180_AUTODETECT_ENABLE_REG,
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ADV7180_AUTODETECT_DEFAULT);
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if (ret < 0) {
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printk(KERN_ERR DRIVER_NAME
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": Failed to communicate to chip: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int adv7180_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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v4l2_device_unregister_subdev(sd);
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kfree(to_state(sd));
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return 0;
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}
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static const struct i2c_device_id adv7180_id[] = {
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{DRIVER_NAME, 0},
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{},
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};
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MODULE_DEVICE_TABLE(i2c, adv7180_id);
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static struct i2c_driver adv7180_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = DRIVER_NAME,
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},
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.probe = adv7180_probe,
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.remove = adv7180_remove,
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.id_table = adv7180_id,
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};
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static __init int adv7180_init(void)
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{
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return i2c_add_driver(&adv7180_driver);
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}
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static __exit void adv7180_exit(void)
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{
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i2c_del_driver(&adv7180_driver);
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}
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module_init(adv7180_init);
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module_exit(adv7180_exit);
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MODULE_DESCRIPTION("Analog Devices ADV7180 video decoder driver");
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MODULE_AUTHOR("Mocean Laboratories");
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MODULE_LICENSE("GPL v2");
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