From: Chaithrika U S <chaithr...@ti.com> THS7303 video amplifier driver code
This patch implements driver for TI THS7303 video amplifier . This driver is implemented as a v4l2-subdev. --- Applies to v4l-dvb repository located at http://linuxtv.org/hg/v4l-dvb/rev/1fd54a62abde drivers/media/video/Kconfig | 9 ++ drivers/media/video/Makefile | 1 + drivers/media/video/ths7303.c | 179 +++++++++++++++++++++++++++++++++++++++++ include/media/ths7303.h | 26 ++++++ 4 files changed, 215 insertions(+), 0 deletions(-) create mode 100644 drivers/media/video/ths7303.c create mode 100644 include/media/ths7303.h diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index 16019e9..b3b591d 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -435,6 +435,15 @@ config VIDEO_ADV7343 To compile this driver as a module, choose M here: the module will be called adv7473. +config VIDEO_THS7303 + tristate "THS7303 Video Amplifier" + depends on I2C + help + Support for TI THS7303 video amplifier + + To compile this driver as a module, choose M here: the + module will be called ths7303. + comment "Video improvement chips" config VIDEO_UPD64031A diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index 7f9fc62..1ed9c2c 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile @@ -55,6 +55,7 @@ obj-$(CONFIG_VIDEO_BT819) += bt819.o obj-$(CONFIG_VIDEO_BT856) += bt856.o obj-$(CONFIG_VIDEO_BT866) += bt866.o obj-$(CONFIG_VIDEO_KS0127) += ks0127.o +obj-$(CONFIG_VIDEO_THS7303) += ths7303.o obj-$(CONFIG_VIDEO_ZORAN) += zoran/ diff --git a/drivers/media/video/ths7303.c b/drivers/media/video/ths7303.c new file mode 100644 index 0000000..a78b450 --- /dev/null +++ b/drivers/media/video/ths7303.c @@ -0,0 +1,179 @@ +/* + * ths7303- THS7303 Video Amplifier driver + * + * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/ + * + * 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 version 2. + * + * This program is distributed .as is. WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/ctype.h> +#include <linux/i2c.h> +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/uaccess.h> +#include <linux/videodev2.h> + +#include <media/v4l2-device.h> +#include <media/v4l2-i2c-drv.h> +#include <media/v4l2-subdev.h> +#include <media/ths7303.h> + +static int debug; + +struct ths7303_state { + struct i2c_client *client; + struct v4l2_subdev sd; +}; + +static inline struct ths7303_state *to_state(struct v4l2_subdev *sd) +{ + return container_of(sd, struct ths7303_state, sd); +} + +/* following function is used to set ths7303 */ +static int ths7303_setvalue(struct v4l2_subdev *sd, v4l2_std_id std) +{ + int err = 0; + u8 val; + struct ths7303_state *state; + struct i2c_client *client; + + state = to_state(sd); + client = state->client; + + if (client == NULL) { + printk(KERN_ERR "THS7303 Client not found\n"); + return -ENODEV; + } + + if ((std == V4L2_STD_NTSC) || (std == V4L2_STD_PAL)) + val = 0x02; + else if ((std == V4L2_STD_480P_60) || (std == V4L2_STD_576P_50)) + val = 0x4A; + else + val = 0x92; + + err |= i2c_smbus_write_byte_data(client, 0x01, val); + err |= i2c_smbus_write_byte_data(client, 0x02, val); + err |= i2c_smbus_write_byte_data(client, 0x03, val); + + if (err) + printk(KERN_ERR "ths7303 write\n"); + + mdelay(100); + + return err; +} + +static long ths7303_ioctl(struct v4l2_subdev *sd, unsigned cmd, void *arg) +{ + int err = 0; + v4l2_dbg(1, debug, sd, "ioctl\n"); + switch (cmd) { + + case THS7303_SETVALUE: + err = ths7303_setvalue(sd, *(v4l2_std_id *) arg); + break; + + default: + break; + } + + return err; +} + +static int ths7303_initialize(struct v4l2_subdev *sd, u32 val) +{ + v4l2_std_id id = V4L2_STD_NTSC; + return (int) ths7303_ioctl(sd, THS7303_SETVALUE, &id); +} + +static const struct v4l2_subdev_core_ops ths7303_core_ops = { + .ioctl = ths7303_ioctl, + .init = ths7303_initialize, +}; + +static const struct v4l2_subdev_ops ths7303_ops = { + .core = &ths7303_core_ops, +}; + +static int ths7303_command(struct i2c_client *client, unsigned cmd, void *arg) +{ + return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg); +} + +static int ths7303_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct ths7303_state *state; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + v4l2_info(client, "chip found @ 0x%x (%s)\n", + client->addr << 1, client->adapter->name); + + state = kzalloc(sizeof(struct ths7303_state), GFP_KERNEL); + if (state == NULL) + return -ENOMEM; + + state->client = client; + v4l2_i2c_subdev_init(&state->sd, client, &ths7303_ops); + v4l2_dbg(1, debug, client, "Registered video amplifier\n"); + + return 0; +} + +static int ths7303_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 ths7303_id[] = { + {THS7303_NAME, 0}, + {}, +}; + +MODULE_DEVICE_TABLE(i2c, ths7303_id); + +static struct v4l2_i2c_driver_data v4l2_i2c_data = { + .name = THS7303_NAME, + .command = ths7303_command, + .probe = ths7303_probe, + .remove = ths7303_remove, + .legacy_class = I2C_CLASS_TV_ANALOG | I2C_CLASS_TV_DIGITAL, + .id_table = ths7303_id, +}; + +static int __init ths7303_init(void) +{ + return 0; +} + +static void __exit ths7303_exit(void) +{ + +} + +module_init(ths7303_init); +module_exit(ths7303_exit); + +MODULE_DESCRIPTION("THS7303 video amplifier driver"); +MODULE_AUTHOR("Chaithrika U S"); +MODULE_LICENSE("GPL"); + diff --git a/include/media/ths7303.h b/include/media/ths7303.h new file mode 100644 index 0000000..5426941 --- /dev/null +++ b/include/media/ths7303.h @@ -0,0 +1,26 @@ +/* + * THS7303 header file + * + * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/ + * + * 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 version 2. + * + * This program is distributed .as is. WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef THS7303_H +#define THS7303_H + +#include <linux/videodev2.h> + +#define THS7303_NAME "ths7303" + +#define THS7303_SETVALUE _IOW('e', BASE_VIDIOC_PRIVATE + 1,\ + v4l2_std_id *) + +#endif -- 1.5.6 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
