diff options
Diffstat (limited to 'drivers/media/video/adv7180.c')
| -rw-r--r-- | drivers/media/video/adv7180.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/drivers/media/video/adv7180.c b/drivers/media/video/adv7180.c new file mode 100644 index 00000000000..1b3cbd02a7f --- /dev/null +++ b/drivers/media/video/adv7180.c @@ -0,0 +1,202 @@ +/* + * 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"); + |