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437 lines
10 KiB
437 lines
10 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-subdev.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ctrls.h> |
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#define TW2804_REG_AUTOGAIN 0x02 |
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#define TW2804_REG_HUE 0x0f |
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#define TW2804_REG_SATURATION 0x10 |
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#define TW2804_REG_CONTRAST 0x11 |
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#define TW2804_REG_BRIGHTNESS 0x12 |
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#define TW2804_REG_COLOR_KILLER 0x14 |
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#define TW2804_REG_GAIN 0x3c |
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#define TW2804_REG_CHROMA_GAIN 0x3d |
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#define TW2804_REG_BLUE_BALANCE 0x3e |
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#define TW2804_REG_RED_BALANCE 0x3f |
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struct tw2804 { |
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struct v4l2_subdev sd; |
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struct v4l2_ctrl_handler hdl; |
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u8 channel:2; |
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u8 input:1; |
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int norm; |
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}; |
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static const u8 global_registers[] = { |
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0x39, 0x00, |
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0x3a, 0xff, |
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0x3b, 0x84, |
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0x3c, 0x80, |
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0x3d, 0x80, |
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0x3e, 0x82, |
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0x3f, 0x82, |
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0x78, 0x00, |
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0xff, 0xff, /* Terminator (reg 0xff does not exist) */ |
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}; |
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static const u8 channel_registers[] = { |
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0x01, 0xc4, |
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0x02, 0xa5, |
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0x03, 0x20, |
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0x04, 0xd0, |
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0x05, 0x20, |
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0x06, 0xd0, |
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0x07, 0x88, |
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0x08, 0x20, |
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0x09, 0x07, |
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0x0a, 0xf0, |
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0x0b, 0x07, |
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0x0c, 0xf0, |
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0x0d, 0x40, |
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0x0e, 0xd2, |
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0x0f, 0x80, |
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0x10, 0x80, |
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0x11, 0x80, |
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0x12, 0x80, |
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0x13, 0x1f, |
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0x14, 0x00, |
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0x15, 0x00, |
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0x16, 0x00, |
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0x17, 0x00, |
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0x18, 0xff, |
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0x19, 0xff, |
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0x1a, 0xff, |
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0x1b, 0xff, |
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0x1c, 0xff, |
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0x1d, 0xff, |
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0x1e, 0xff, |
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0x1f, 0xff, |
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0x20, 0x07, |
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0x21, 0x07, |
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0x22, 0x00, |
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0x23, 0x91, |
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0x24, 0x51, |
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0x25, 0x03, |
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0x26, 0x00, |
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0x27, 0x00, |
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0x28, 0x00, |
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0x29, 0x00, |
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0x2a, 0x00, |
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0x2b, 0x00, |
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0x2c, 0x00, |
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0x2d, 0x00, |
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0x2e, 0x00, |
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0x2f, 0x00, |
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0x30, 0x00, |
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0x31, 0x00, |
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0x32, 0x00, |
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0x33, 0x00, |
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0x34, 0x00, |
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0x35, 0x00, |
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0x36, 0x00, |
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0x37, 0x00, |
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0xff, 0xff, /* Terminator (reg 0xff does not exist) */ |
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}; |
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static int write_reg(struct i2c_client *client, u8 reg, u8 value, u8 channel) |
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{ |
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return i2c_smbus_write_byte_data(client, reg | (channel << 6), value); |
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} |
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static int write_regs(struct i2c_client *client, const u8 *regs, u8 channel) |
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{ |
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int ret; |
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int i; |
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for (i = 0; regs[i] != 0xff; i += 2) { |
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ret = i2c_smbus_write_byte_data(client, |
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regs[i] | (channel << 6), regs[i + 1]); |
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if (ret < 0) |
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return ret; |
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} |
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return 0; |
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} |
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static int read_reg(struct i2c_client *client, u8 reg, u8 channel) |
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{ |
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return i2c_smbus_read_byte_data(client, (reg) | (channel << 6)); |
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} |
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static inline struct tw2804 *to_state(struct v4l2_subdev *sd) |
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{ |
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return container_of(sd, struct tw2804, sd); |
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} |
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static inline struct tw2804 *to_state_from_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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return container_of(ctrl->handler, struct tw2804, hdl); |
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} |
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static int tw2804_log_status(struct v4l2_subdev *sd) |
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{ |
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struct tw2804 *state = to_state(sd); |
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v4l2_info(sd, "Standard: %s\n", |
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state->norm & V4L2_STD_525_60 ? "60 Hz" : "50 Hz"); |
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v4l2_info(sd, "Channel: %d\n", state->channel); |
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v4l2_info(sd, "Input: %d\n", state->input); |
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return v4l2_ctrl_subdev_log_status(sd); |
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} |
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/* |
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* These volatile controls are needed because all four channels share |
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* these controls. So a change made to them through one channel would |
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* require another channel to be updated. |
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* |
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* Normally this would have been done in a different way, but since the one |
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* board that uses this driver sees this single chip as if it was on four |
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* different i2c adapters (each adapter belonging to a separate instance of |
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* the same USB driver) there is no reliable method that I have found to let |
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* the instances know about each other. |
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* |
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* So implementing these global registers as volatile is the best we can do. |
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*/ |
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static int tw2804_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct tw2804 *state = to_state_from_ctrl(ctrl); |
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struct i2c_client *client = v4l2_get_subdevdata(&state->sd); |
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switch (ctrl->id) { |
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case V4L2_CID_GAIN: |
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ctrl->val = read_reg(client, TW2804_REG_GAIN, 0); |
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return 0; |
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case V4L2_CID_CHROMA_GAIN: |
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ctrl->val = read_reg(client, TW2804_REG_CHROMA_GAIN, 0); |
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return 0; |
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case V4L2_CID_BLUE_BALANCE: |
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ctrl->val = read_reg(client, TW2804_REG_BLUE_BALANCE, 0); |
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return 0; |
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case V4L2_CID_RED_BALANCE: |
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ctrl->val = read_reg(client, TW2804_REG_RED_BALANCE, 0); |
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return 0; |
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} |
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return 0; |
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} |
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static int tw2804_s_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct tw2804 *state = to_state_from_ctrl(ctrl); |
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struct i2c_client *client = v4l2_get_subdevdata(&state->sd); |
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int addr; |
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int reg; |
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switch (ctrl->id) { |
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case V4L2_CID_AUTOGAIN: |
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addr = TW2804_REG_AUTOGAIN; |
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reg = read_reg(client, addr, state->channel); |
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if (reg < 0) |
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return reg; |
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if (ctrl->val == 0) |
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reg &= ~(1 << 7); |
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else |
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reg |= 1 << 7; |
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return write_reg(client, addr, reg, state->channel); |
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case V4L2_CID_COLOR_KILLER: |
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addr = TW2804_REG_COLOR_KILLER; |
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reg = read_reg(client, addr, state->channel); |
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if (reg < 0) |
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return reg; |
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reg = (reg & ~(0x03)) | (ctrl->val == 0 ? 0x02 : 0x03); |
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return write_reg(client, addr, reg, state->channel); |
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case V4L2_CID_GAIN: |
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return write_reg(client, TW2804_REG_GAIN, ctrl->val, 0); |
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case V4L2_CID_CHROMA_GAIN: |
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return write_reg(client, TW2804_REG_CHROMA_GAIN, ctrl->val, 0); |
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case V4L2_CID_BLUE_BALANCE: |
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return write_reg(client, TW2804_REG_BLUE_BALANCE, ctrl->val, 0); |
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case V4L2_CID_RED_BALANCE: |
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return write_reg(client, TW2804_REG_RED_BALANCE, ctrl->val, 0); |
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case V4L2_CID_BRIGHTNESS: |
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return write_reg(client, TW2804_REG_BRIGHTNESS, |
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ctrl->val, state->channel); |
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case V4L2_CID_CONTRAST: |
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return write_reg(client, TW2804_REG_CONTRAST, |
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ctrl->val, state->channel); |
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case V4L2_CID_SATURATION: |
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return write_reg(client, TW2804_REG_SATURATION, |
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ctrl->val, state->channel); |
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case V4L2_CID_HUE: |
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return write_reg(client, TW2804_REG_HUE, |
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ctrl->val, state->channel); |
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default: |
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break; |
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} |
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return -EINVAL; |
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} |
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static int tw2804_s_std(struct v4l2_subdev *sd, v4l2_std_id norm) |
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{ |
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struct tw2804 *dec = to_state(sd); |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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bool is_60hz = norm & V4L2_STD_525_60; |
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u8 regs[] = { |
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0x01, is_60hz ? 0xc4 : 0x84, |
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0x09, is_60hz ? 0x07 : 0x04, |
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0x0a, is_60hz ? 0xf0 : 0x20, |
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0x0b, is_60hz ? 0x07 : 0x04, |
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0x0c, is_60hz ? 0xf0 : 0x20, |
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0x0d, is_60hz ? 0x40 : 0x4a, |
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0x16, is_60hz ? 0x00 : 0x40, |
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0x17, is_60hz ? 0x00 : 0x40, |
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0x20, is_60hz ? 0x07 : 0x0f, |
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0x21, is_60hz ? 0x07 : 0x0f, |
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0xff, 0xff, |
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}; |
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write_regs(client, regs, dec->channel); |
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dec->norm = norm; |
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return 0; |
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} |
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static int tw2804_s_video_routing(struct v4l2_subdev *sd, u32 input, u32 output, |
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u32 config) |
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{ |
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struct tw2804 *dec = to_state(sd); |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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int reg; |
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if (config && config - 1 != dec->channel) { |
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if (config > 4) { |
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dev_err(&client->dev, |
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"channel %d is not between 1 and 4!\n", config); |
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return -EINVAL; |
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} |
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dec->channel = config - 1; |
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dev_dbg(&client->dev, "initializing TW2804 channel %d\n", |
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dec->channel); |
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if (dec->channel == 0 && |
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write_regs(client, global_registers, 0) < 0) { |
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dev_err(&client->dev, |
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"error initializing TW2804 global registers\n"); |
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return -EIO; |
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} |
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if (write_regs(client, channel_registers, dec->channel) < 0) { |
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dev_err(&client->dev, |
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"error initializing TW2804 channel %d\n", |
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dec->channel); |
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return -EIO; |
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} |
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} |
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if (input > 1) |
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return -EINVAL; |
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if (input == dec->input) |
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return 0; |
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reg = read_reg(client, 0x22, dec->channel); |
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if (reg >= 0) { |
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if (input == 0) |
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reg &= ~(1 << 2); |
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else |
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reg |= 1 << 2; |
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reg = write_reg(client, 0x22, reg, dec->channel); |
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} |
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if (reg >= 0) |
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dec->input = input; |
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else |
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return reg; |
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return 0; |
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} |
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static const struct v4l2_ctrl_ops tw2804_ctrl_ops = { |
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.g_volatile_ctrl = tw2804_g_volatile_ctrl, |
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.s_ctrl = tw2804_s_ctrl, |
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}; |
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static const struct v4l2_subdev_video_ops tw2804_video_ops = { |
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.s_std = tw2804_s_std, |
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.s_routing = tw2804_s_video_routing, |
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}; |
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static const struct v4l2_subdev_core_ops tw2804_core_ops = { |
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.log_status = tw2804_log_status, |
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}; |
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static const struct v4l2_subdev_ops tw2804_ops = { |
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.core = &tw2804_core_ops, |
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.video = &tw2804_video_ops, |
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}; |
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static int tw2804_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct i2c_adapter *adapter = client->adapter; |
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struct tw2804 *state; |
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struct v4l2_subdev *sd; |
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struct v4l2_ctrl *ctrl; |
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int err; |
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
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return -ENODEV; |
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state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); |
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if (state == NULL) |
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return -ENOMEM; |
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sd = &state->sd; |
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v4l2_i2c_subdev_init(sd, client, &tw2804_ops); |
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state->channel = -1; |
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state->norm = V4L2_STD_NTSC; |
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v4l2_ctrl_handler_init(&state->hdl, 10); |
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v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops, |
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V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); |
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v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops, |
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V4L2_CID_CONTRAST, 0, 255, 1, 128); |
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v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops, |
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V4L2_CID_SATURATION, 0, 255, 1, 128); |
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v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops, |
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V4L2_CID_HUE, 0, 255, 1, 128); |
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v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops, |
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V4L2_CID_COLOR_KILLER, 0, 1, 1, 0); |
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v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops, |
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V4L2_CID_AUTOGAIN, 0, 1, 1, 0); |
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ctrl = v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops, |
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V4L2_CID_GAIN, 0, 255, 1, 128); |
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if (ctrl) |
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ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; |
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ctrl = v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops, |
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V4L2_CID_CHROMA_GAIN, 0, 255, 1, 128); |
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if (ctrl) |
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ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; |
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ctrl = v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops, |
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V4L2_CID_BLUE_BALANCE, 0, 255, 1, 122); |
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if (ctrl) |
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ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; |
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ctrl = v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops, |
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V4L2_CID_RED_BALANCE, 0, 255, 1, 122); |
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if (ctrl) |
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ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; |
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sd->ctrl_handler = &state->hdl; |
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err = state->hdl.error; |
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if (err) { |
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v4l2_ctrl_handler_free(&state->hdl); |
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return err; |
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} |
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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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return 0; |
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} |
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static int tw2804_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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struct tw2804 *state = to_state(sd); |
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v4l2_device_unregister_subdev(sd); |
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v4l2_ctrl_handler_free(&state->hdl); |
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return 0; |
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} |
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static const struct i2c_device_id tw2804_id[] = { |
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{ "tw2804", 0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, tw2804_id); |
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static struct i2c_driver tw2804_driver = { |
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.driver = { |
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.name = "tw2804", |
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}, |
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.probe = tw2804_probe, |
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.remove = tw2804_remove, |
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.id_table = tw2804_id, |
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}; |
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module_i2c_driver(tw2804_driver); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_DESCRIPTION("TW2804/TW2802 V4L2 i2c driver"); |
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MODULE_AUTHOR("Micronas USA Inc");
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