projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 40199c50 C |
1 | /* |
| 2 | * ths7303- THS7303 Video Amplifier driver | |
| 3 | * | |
| 4 | * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/ | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License as | |
| 8 | * published by the Free Software Foundation version 2. | |
| 9 | * | |
| 10 | * This program is distributed .as is. WITHOUT ANY WARRANTY of any | |
| 11 | * kind, whether express or implied; without even the implied warranty | |
| 12 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | */ | |
| 15 | ||
| 16 | #include <linux/kernel.h> | |
| 17 | #include <linux/init.h> | |
| 18 | #include <linux/ctype.h> | |
| 19 | #include <linux/i2c.h> | |
| 20 | #include <linux/device.h> | |
| 21 | #include <linux/delay.h> | |
| 22 | #include <linux/module.h> | |
| 23 | #include <linux/uaccess.h> | |
| 24 | #include <linux/videodev2.h> | |
| 25 | ||
| 26 | #include <media/v4l2-device.h> | |
| 27 | #include <media/v4l2-subdev.h> | |
| 28 | #include <media/v4l2-chip-ident.h> | |
| 29 | ||
| 30 | MODULE_DESCRIPTION("TI THS7303 video amplifier driver"); | |
| 31 | MODULE_AUTHOR("Chaithrika U S"); | |
| 32 | MODULE_LICENSE("GPL"); | |
| 33 | ||
| 34 | static int debug; | |
| 35 | module_param(debug, int, 0644); | |
| 36 | MODULE_PARM_DESC(debug, "Debug level 0-1"); | |
| 37 | ||
| 38 | /* following function is used to set ths7303 */ | |
| 39 | static int ths7303_setvalue(struct v4l2_subdev *sd, v4l2_std_id std) | |
| 40 | { | |
| 41 | int err = 0; | |
| 42 | u8 val; | |
| 43 | struct i2c_client *client; | |
| 44 | ||
| 45 | client = v4l2_get_subdevdata(sd); | |
| 46 | ||
| 47 | if (std & (V4L2_STD_ALL & ~V4L2_STD_SECAM)) { | |
| 48 | val = 0x02; | |
| 49 | v4l2_dbg(1, debug, sd, "setting value for SDTV format\n"); | |
| 50 | } else { | |
| 51 | val = 0x00; | |
| 52 | v4l2_dbg(1, debug, sd, "disabling all channels\n"); | |
| 53 | } | |
| 54 | ||
| 55 | err |= i2c_smbus_write_byte_data(client, 0x01, val); | |
| 56 | err |= i2c_smbus_write_byte_data(client, 0x02, val); | |
| 57 | err |= i2c_smbus_write_byte_data(client, 0x03, val); | |
| 58 | ||
| 59 | if (err) | |
| 60 | v4l2_err(sd, "write failed\n"); | |
| 61 | ||
| 62 | return err; | |
| 63 | } | |
| 64 | ||
| 65 | static int ths7303_s_std_output(struct v4l2_subdev *sd, v4l2_std_id norm) | |
| 66 | { | |
| 67 | return ths7303_setvalue(sd, norm); | |
| 68 | } | |
| 69 | ||
| 70 | static int ths7303_g_chip_ident(struct v4l2_subdev *sd, | |
| 71 | struct v4l2_dbg_chip_ident *chip) | |
| 72 | { | |
| 73 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
| 74 | ||
| 75 | return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_THS7303, 0); | |
| 76 | } | |
| 77 | ||
| 78 | static const struct v4l2_subdev_video_ops ths7303_video_ops = { | |
| 79 | .s_std_output = ths7303_s_std_output, | |
| 80 | }; | |
| 81 | ||
| 82 | static const struct v4l2_subdev_core_ops ths7303_core_ops = { | |
| 83 | .g_chip_ident = ths7303_g_chip_ident, | |
| 84 | }; | |
| 85 | ||
| 86 | static const struct v4l2_subdev_ops ths7303_ops = { | |
| 87 | .core = &ths7303_core_ops, | |
| 88 | .video = &ths7303_video_ops, | |
| 89 | }; | |
| 90 | ||
| 91 | static int ths7303_probe(struct i2c_client *client, | |
| 92 | const struct i2c_device_id *id) | |
| 93 | { | |
| 94 | struct v4l2_subdev *sd; | |
| 95 | v4l2_std_id std_id = V4L2_STD_NTSC; | |
| 96 | ||
| 97 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
| 98 | return -ENODEV; | |
| 99 | ||
| 100 | v4l_info(client, "chip found @ 0x%x (%s)\n", | |
| 101 | client->addr << 1, client->adapter->name); | |
| 102 | ||
| 103 | sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL); | |
| 104 | if (sd == NULL) | |
| 105 | return -ENOMEM; | |
| 106 | ||
| 107 | v4l2_i2c_subdev_init(sd, client, &ths7303_ops); | |
| 108 | ||
| 109 | return ths7303_setvalue(sd, std_id); | |
| 110 | } | |
| 111 | ||
| 112 | static int ths7303_remove(struct i2c_client *client) | |
| 113 | { | |
| 114 | struct v4l2_subdev *sd = i2c_get_clientdata(client); | |
| 115 | ||
| 116 | v4l2_device_unregister_subdev(sd); | |
| 117 | kfree(sd); | |
| 118 | ||
| 119 | return 0; | |
| 120 | } | |
| 121 | ||
| 122 | static const struct i2c_device_id ths7303_id[] = { | |
| 123 | {"ths7303", 0}, | |
| 124 | {}, | |
| 125 | }; | |
| 126 | ||
| 127 | MODULE_DEVICE_TABLE(i2c, ths7303_id); | |
| 128 | ||
| 129 | static struct i2c_driver ths7303_driver = { | |
| 130 | .driver = { | |
| 131 | .owner = THIS_MODULE, | |
| 132 | .name = "ths7303", | |
| 133 | }, | |
| 134 | .probe = ths7303_probe, | |
| 135 | .remove = ths7303_remove, | |
| 136 | .id_table = ths7303_id, | |
| 137 | }; | |
| 138 | ||
| 139 | static int __init ths7303_init(void) | |
| 140 | { | |
| 141 | return i2c_add_driver(&ths7303_driver); | |
| 142 | } | |
| 143 | ||
| 144 | static void __exit ths7303_exit(void) | |
| 145 | { | |
| 146 | i2c_del_driver(&ths7303_driver); | |
| 147 | } | |
| 148 | ||
| 149 | module_init(ths7303_init); | |
| 150 | module_exit(ths7303_exit); | |
| 151 |