![Lad, Prabhakar](/assets/img/avatar_default.png)
I2C drivers can use devm_kzalloc() too in their .probe() methods. Doing so simplifies their clean up paths. Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com> Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
214 lines
5.2 KiB
C
214 lines
5.2 KiB
C
/*
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* ths7303- THS7303 Video Amplifier driver
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*
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* Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed .as is. WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of 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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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/ctype.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/uaccess.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-subdev.h>
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#include <media/v4l2-chip-ident.h>
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#define THS7303_CHANNEL_1 1
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#define THS7303_CHANNEL_2 2
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#define THS7303_CHANNEL_3 3
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enum ths7303_filter_mode {
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THS7303_FILTER_MODE_480I_576I,
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THS7303_FILTER_MODE_480P_576P,
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THS7303_FILTER_MODE_720P_1080I,
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THS7303_FILTER_MODE_1080P,
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THS7303_FILTER_MODE_DISABLE
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};
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MODULE_DESCRIPTION("TI THS7303 video amplifier driver");
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MODULE_AUTHOR("Chaithrika U S");
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MODULE_LICENSE("GPL");
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Debug level 0-1");
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/* following function is used to set ths7303 */
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int ths7303_setval(struct v4l2_subdev *sd, enum ths7303_filter_mode mode)
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{
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u8 input_bias_chroma = 3;
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u8 input_bias_luma = 3;
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int disable = 0;
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int err = 0;
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u8 val = 0;
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u8 temp;
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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if (!client)
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return -EINVAL;
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switch (mode) {
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case THS7303_FILTER_MODE_1080P:
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val = (3 << 6);
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val |= (3 << 3);
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break;
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case THS7303_FILTER_MODE_720P_1080I:
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val = (2 << 6);
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val |= (2 << 3);
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break;
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case THS7303_FILTER_MODE_480P_576P:
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val = (1 << 6);
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val |= (1 << 3);
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break;
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case THS7303_FILTER_MODE_480I_576I:
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break;
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case THS7303_FILTER_MODE_DISABLE:
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pr_info("mode disabled\n");
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/* disable all channels */
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disable = 1;
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default:
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/* disable all channels */
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disable = 1;
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}
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/* Setup channel 2 - Luma - Green */
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temp = val;
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if (!disable)
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val |= input_bias_luma;
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err = i2c_smbus_write_byte_data(client, THS7303_CHANNEL_2, val);
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if (err)
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goto out;
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/* setup two chroma channels */
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if (!disable)
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temp |= input_bias_chroma;
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err = i2c_smbus_write_byte_data(client, THS7303_CHANNEL_1, temp);
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if (err)
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goto out;
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err = i2c_smbus_write_byte_data(client, THS7303_CHANNEL_3, temp);
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if (err)
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goto out;
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return err;
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out:
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pr_info("write byte data failed\n");
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return err;
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}
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static int ths7303_s_std_output(struct v4l2_subdev *sd, v4l2_std_id norm)
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{
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if (norm & (V4L2_STD_ALL & ~V4L2_STD_SECAM))
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return ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I);
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else
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return ths7303_setval(sd, THS7303_FILTER_MODE_DISABLE);
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}
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/* for setting filter for HD output */
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static int ths7303_s_dv_timings(struct v4l2_subdev *sd,
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struct v4l2_dv_timings *dv_timings)
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{
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u32 height = dv_timings->bt.height;
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int interlaced = dv_timings->bt.interlaced;
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int res = 0;
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if (height == 1080 && !interlaced)
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res = ths7303_setval(sd, THS7303_FILTER_MODE_1080P);
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else if ((height == 720 && !interlaced) ||
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(height == 1080 && interlaced))
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res = ths7303_setval(sd, THS7303_FILTER_MODE_720P_1080I);
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else if ((height == 480 || height == 576) && !interlaced)
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res = ths7303_setval(sd, THS7303_FILTER_MODE_480P_576P);
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else
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/* disable all channels */
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res = ths7303_setval(sd, THS7303_FILTER_MODE_DISABLE);
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return res;
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}
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static int ths7303_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_THS7303, 0);
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}
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static const struct v4l2_subdev_video_ops ths7303_video_ops = {
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.s_std_output = ths7303_s_std_output,
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.s_dv_timings = ths7303_s_dv_timings,
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};
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static const struct v4l2_subdev_core_ops ths7303_core_ops = {
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.g_chip_ident = ths7303_g_chip_ident,
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};
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static const struct v4l2_subdev_ops ths7303_ops = {
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.core = &ths7303_core_ops,
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.video = &ths7303_video_ops,
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};
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static int ths7303_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct v4l2_subdev *sd;
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v4l2_std_id std_id = V4L2_STD_NTSC;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -ENODEV;
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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client->addr << 1, client->adapter->name);
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sd = devm_kzalloc(&client->dev, sizeof(struct v4l2_subdev), GFP_KERNEL);
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if (sd == NULL)
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return -ENOMEM;
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v4l2_i2c_subdev_init(sd, client, &ths7303_ops);
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return ths7303_s_std_output(sd, std_id);
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}
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static int ths7303_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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return 0;
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}
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static const struct i2c_device_id ths7303_id[] = {
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{"ths7303", 0},
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{},
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};
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MODULE_DEVICE_TABLE(i2c, ths7303_id);
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static struct i2c_driver ths7303_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "ths7303",
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},
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.probe = ths7303_probe,
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.remove = ths7303_remove,
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.id_table = ths7303_id,
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};
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module_i2c_driver(ths7303_driver);
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