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231 lines
5.1 KiB
231 lines
5.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2005-2006 Micronas USA Inc. |
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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/i2c.h> |
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#include <linux/videodev2.h> |
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#include <linux/ioctl.h> |
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#include <linux/slab.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ctrls.h> |
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MODULE_DESCRIPTION("TW9906 I2C subdev driver"); |
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MODULE_LICENSE("GPL v2"); |
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struct tw9906 { |
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struct v4l2_subdev sd; |
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struct v4l2_ctrl_handler hdl; |
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v4l2_std_id norm; |
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}; |
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static inline struct tw9906 *to_state(struct v4l2_subdev *sd) |
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{ |
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return container_of(sd, struct tw9906, sd); |
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} |
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static const u8 initial_registers[] = { |
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0x02, 0x40, /* input 0, composite */ |
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0x03, 0xa2, /* correct digital format */ |
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0x05, 0x81, /* or 0x01 for PAL */ |
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0x07, 0x02, /* window */ |
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0x08, 0x14, /* window */ |
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0x09, 0xf0, /* window */ |
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0x0a, 0x10, /* window */ |
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0x0b, 0xd0, /* window */ |
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0x0d, 0x00, /* scaling */ |
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0x0e, 0x11, /* scaling */ |
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0x0f, 0x00, /* scaling */ |
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0x10, 0x00, /* brightness */ |
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0x11, 0x60, /* contrast */ |
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0x12, 0x11, /* sharpness */ |
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0x13, 0x7e, /* U gain */ |
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0x14, 0x7e, /* V gain */ |
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0x15, 0x00, /* hue */ |
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0x19, 0x57, /* vbi */ |
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0x1a, 0x0f, |
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0x1b, 0x40, |
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0x29, 0x03, |
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0x55, 0x00, |
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0x6b, 0x26, |
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0x6c, 0x36, |
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0x6d, 0xf0, |
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0x6e, 0x41, |
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0x6f, 0x13, |
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0xad, 0x70, |
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0x00, 0x00, /* Terminator (reg 0x00 is read-only) */ |
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}; |
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static int write_reg(struct v4l2_subdev *sd, u8 reg, u8 value) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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return i2c_smbus_write_byte_data(client, reg, value); |
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} |
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static int write_regs(struct v4l2_subdev *sd, const u8 *regs) |
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{ |
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int i; |
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for (i = 0; regs[i] != 0x00; i += 2) |
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if (write_reg(sd, regs[i], regs[i + 1]) < 0) |
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return -1; |
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return 0; |
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} |
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static int tw9906_s_video_routing(struct v4l2_subdev *sd, u32 input, |
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u32 output, u32 config) |
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{ |
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write_reg(sd, 0x02, 0x40 | (input << 1)); |
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return 0; |
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} |
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static int tw9906_s_std(struct v4l2_subdev *sd, v4l2_std_id norm) |
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{ |
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struct tw9906 *dec = to_state(sd); |
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bool is_60hz = norm & V4L2_STD_525_60; |
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static const u8 config_60hz[] = { |
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0x05, 0x81, |
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0x07, 0x02, |
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0x08, 0x14, |
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0x09, 0xf0, |
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0, 0, |
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}; |
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static const u8 config_50hz[] = { |
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0x05, 0x01, |
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0x07, 0x12, |
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0x08, 0x18, |
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0x09, 0x20, |
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0, 0, |
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}; |
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write_regs(sd, is_60hz ? config_60hz : config_50hz); |
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dec->norm = norm; |
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return 0; |
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} |
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static int tw9906_s_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct tw9906 *dec = container_of(ctrl->handler, struct tw9906, hdl); |
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struct v4l2_subdev *sd = &dec->sd; |
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switch (ctrl->id) { |
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case V4L2_CID_BRIGHTNESS: |
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write_reg(sd, 0x10, ctrl->val); |
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break; |
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case V4L2_CID_CONTRAST: |
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write_reg(sd, 0x11, ctrl->val); |
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break; |
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case V4L2_CID_HUE: |
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write_reg(sd, 0x15, ctrl->val); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int tw9906_log_status(struct v4l2_subdev *sd) |
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{ |
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struct tw9906 *dec = to_state(sd); |
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bool is_60hz = dec->norm & V4L2_STD_525_60; |
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v4l2_info(sd, "Standard: %d Hz\n", is_60hz ? 60 : 50); |
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v4l2_ctrl_subdev_log_status(sd); |
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return 0; |
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} |
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/* --------------------------------------------------------------------------*/ |
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static const struct v4l2_ctrl_ops tw9906_ctrl_ops = { |
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.s_ctrl = tw9906_s_ctrl, |
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}; |
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static const struct v4l2_subdev_core_ops tw9906_core_ops = { |
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.log_status = tw9906_log_status, |
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}; |
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static const struct v4l2_subdev_video_ops tw9906_video_ops = { |
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.s_std = tw9906_s_std, |
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.s_routing = tw9906_s_video_routing, |
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}; |
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static const struct v4l2_subdev_ops tw9906_ops = { |
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.core = &tw9906_core_ops, |
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.video = &tw9906_video_ops, |
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}; |
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static int tw9906_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct tw9906 *dec; |
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struct v4l2_subdev *sd; |
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struct v4l2_ctrl_handler *hdl; |
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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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dec = devm_kzalloc(&client->dev, sizeof(*dec), GFP_KERNEL); |
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if (dec == NULL) |
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return -ENOMEM; |
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sd = &dec->sd; |
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v4l2_i2c_subdev_init(sd, client, &tw9906_ops); |
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hdl = &dec->hdl; |
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v4l2_ctrl_handler_init(hdl, 4); |
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v4l2_ctrl_new_std(hdl, &tw9906_ctrl_ops, |
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V4L2_CID_BRIGHTNESS, -128, 127, 1, 0); |
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v4l2_ctrl_new_std(hdl, &tw9906_ctrl_ops, |
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V4L2_CID_CONTRAST, 0, 255, 1, 0x60); |
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v4l2_ctrl_new_std(hdl, &tw9906_ctrl_ops, |
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V4L2_CID_HUE, -128, 127, 1, 0); |
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sd->ctrl_handler = hdl; |
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if (hdl->error) { |
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int err = hdl->error; |
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v4l2_ctrl_handler_free(hdl); |
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return err; |
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} |
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/* Initialize tw9906 */ |
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dec->norm = V4L2_STD_NTSC; |
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if (write_regs(sd, initial_registers) < 0) { |
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v4l2_err(client, "error initializing TW9906\n"); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int tw9906_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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v4l2_ctrl_handler_free(&to_state(sd)->hdl); |
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return 0; |
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} |
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/* ----------------------------------------------------------------------- */ |
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static const struct i2c_device_id tw9906_id[] = { |
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{ "tw9906", 0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, tw9906_id); |
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static struct i2c_driver tw9906_driver = { |
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.driver = { |
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.name = "tw9906", |
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}, |
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.probe = tw9906_probe, |
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.remove = tw9906_remove, |
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.id_table = tw9906_id, |
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}; |
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module_i2c_driver(tw9906_driver);
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