248 lines
6.6 KiB
C
248 lines
6.6 KiB
C
/*
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* upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan
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*
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* 2003 by T.Adachi <tadachi@tadachi-net.com>
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* 2003 by Takeru KOMORIYA <komoriya@paken.org>
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* 2006 by Hans Verkuil <hverkuil@xs4all.nl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* 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/module.h>
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#include <linux/kernel.h>
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#include <linux/i2c.h>
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#include <linux/videodev2.h>
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#include <linux/slab.h>
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#include <media/v4l2-device.h>
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#include <media/i2c/upd64031a.h>
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/* --------------------- read registers functions define -------------------- */
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/* bit masks */
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#define GR_MODE_MASK 0xc0
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#define DIRECT_3DYCS_CONNECT_MASK 0xc0
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#define SYNC_CIRCUIT_MASK 0xa0
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/* -------------------------------------------------------------------------- */
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MODULE_DESCRIPTION("uPD64031A driver");
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MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
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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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enum {
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R00 = 0, R01, R02, R03, R04,
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R05, R06, R07, R08, R09,
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R0A, R0B, R0C, R0D, R0E, R0F,
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/* unused registers
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R10, R11, R12, R13, R14,
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R15, R16, R17,
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*/
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TOT_REGS
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};
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struct upd64031a_state {
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struct v4l2_subdev sd;
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u8 regs[TOT_REGS];
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u8 gr_mode;
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u8 direct_3dycs_connect;
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u8 ext_comp_sync;
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u8 ext_vert_sync;
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};
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static inline struct upd64031a_state *to_state(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct upd64031a_state, sd);
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}
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static u8 upd64031a_init[] = {
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0x00, 0xb8, 0x48, 0xd2, 0xe6,
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0x03, 0x10, 0x0b, 0xaf, 0x7f,
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0x00, 0x00, 0x1d, 0x5e, 0x00,
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0xd0
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};
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/* ------------------------------------------------------------------------ */
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static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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u8 buf[2];
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if (reg >= sizeof(buf))
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return 0xff;
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i2c_master_recv(client, buf, 2);
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return buf[reg];
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}
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/* ------------------------------------------------------------------------ */
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static void upd64031a_write(struct v4l2_subdev *sd, u8 reg, u8 val)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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u8 buf[2];
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buf[0] = reg;
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buf[1] = val;
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v4l2_dbg(1, debug, sd, "write reg: %02X val: %02X\n", reg, val);
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if (i2c_master_send(client, buf, 2) != 2)
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v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
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}
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/* ------------------------------------------------------------------------ */
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/* The input changed due to new input or channel changed */
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static int upd64031a_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq)
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{
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struct upd64031a_state *state = to_state(sd);
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u8 reg = state->regs[R00];
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v4l2_dbg(1, debug, sd, "changed input or channel\n");
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upd64031a_write(sd, R00, reg | 0x10);
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upd64031a_write(sd, R00, reg & ~0x10);
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return 0;
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}
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/* ------------------------------------------------------------------------ */
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static int upd64031a_s_routing(struct v4l2_subdev *sd,
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u32 input, u32 output, u32 config)
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{
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struct upd64031a_state *state = to_state(sd);
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u8 r00, r05, r08;
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state->gr_mode = (input & 3) << 6;
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state->direct_3dycs_connect = (input & 0xc) << 4;
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state->ext_comp_sync =
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(input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
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state->ext_vert_sync =
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(input & UPD64031A_VERTICAL_EXTERNAL) << 2;
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r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
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r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
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state->ext_comp_sync | state->ext_vert_sync;
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r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
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state->direct_3dycs_connect;
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upd64031a_write(sd, R00, r00);
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upd64031a_write(sd, R05, r05);
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upd64031a_write(sd, R08, r08);
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return upd64031a_s_frequency(sd, NULL);
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}
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static int upd64031a_log_status(struct v4l2_subdev *sd)
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{
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v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n",
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upd64031a_read(sd, 0), upd64031a_read(sd, 1));
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return 0;
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}
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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static int upd64031a_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
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{
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reg->val = upd64031a_read(sd, reg->reg & 0xff);
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reg->size = 1;
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return 0;
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}
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static int upd64031a_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
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{
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upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff);
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return 0;
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}
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#endif
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_subdev_core_ops upd64031a_core_ops = {
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.log_status = upd64031a_log_status,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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.g_register = upd64031a_g_register,
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.s_register = upd64031a_s_register,
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#endif
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};
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static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = {
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.s_frequency = upd64031a_s_frequency,
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};
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static const struct v4l2_subdev_video_ops upd64031a_video_ops = {
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.s_routing = upd64031a_s_routing,
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};
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static const struct v4l2_subdev_ops upd64031a_ops = {
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.core = &upd64031a_core_ops,
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.tuner = &upd64031a_tuner_ops,
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.video = &upd64031a_video_ops,
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};
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/* ------------------------------------------------------------------------ */
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/* i2c implementation */
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static int upd64031a_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct upd64031a_state *state;
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struct v4l2_subdev *sd;
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int i;
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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%x (%s)\n",
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client->addr << 1, client->adapter->name);
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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, &upd64031a_ops);
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memcpy(state->regs, upd64031a_init, sizeof(state->regs));
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state->gr_mode = UPD64031A_GR_ON << 6;
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state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
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state->ext_comp_sync = state->ext_vert_sync = 0;
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for (i = 0; i < TOT_REGS; i++)
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upd64031a_write(sd, i, state->regs[i]);
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return 0;
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}
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static int upd64031a_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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/* ----------------------------------------------------------------------- */
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static const struct i2c_device_id upd64031a_id[] = {
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{ "upd64031a", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, upd64031a_id);
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static struct i2c_driver upd64031a_driver = {
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.driver = {
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.name = "upd64031a",
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},
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.probe = upd64031a_probe,
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.remove = upd64031a_remove,
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.id_table = upd64031a_id,
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};
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module_i2c_driver(upd64031a_driver);
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