drivers/media/i2c/upd64031a.c - vendor/opensource/backports - Git at Google

 /*
  * upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan
  *
  * 2003 by T.Adachi <tadachi@tadachi-net.com>
  * 2003 by Takeru KOMORIYA <komoriya@paken.org>
  * 2006 by Hans Verkuil <hverkuil@xs4all.nl>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */


 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/i2c.h>
 #include <linux/videodev2.h>
 #include <linux/slab.h>
 #include <media/v4l2-device.h>
 #include <media/i2c/upd64031a.h>

 /* --------------------- read registers functions define -------------------- */

 /* bit masks */
 #define GR_MODE_MASK              0xc0
 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
 #define SYNC_CIRCUIT_MASK         0xa0

 /* -------------------------------------------------------------------------- */

 MODULE_DESCRIPTION("uPD64031A driver");
 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
 MODULE_LICENSE("GPL");

 static int debug;
 module_param(debug, int, 0644);

 MODULE_PARM_DESC(debug, "Debug level (0-1)");


 enum {
 	R00 = 0, R01, R02, R03, R04,
 	R05, R06, R07, R08, R09,
 	R0A, R0B, R0C, R0D, R0E, R0F,
 	/* unused registers
 	 R10, R11, R12, R13, R14,
 	 R15, R16, R17,
 	 */
 	TOT_REGS
 };

 struct upd64031a_state {
 	struct v4l2_subdev sd;
 	u8 regs[TOT_REGS];
 	u8 gr_mode;
 	u8 direct_3dycs_connect;
 	u8 ext_comp_sync;
 	u8 ext_vert_sync;
 };

 static inline struct upd64031a_state *to_state(struct v4l2_subdev *sd)
 {
 	return container_of(sd, struct upd64031a_state, sd);
 }

 static u8 upd64031a_init[] = {
 	0x00, 0xb8, 0x48, 0xd2, 0xe6,
 	0x03, 0x10, 0x0b, 0xaf, 0x7f,
 	0x00, 0x00, 0x1d, 0x5e, 0x00,
 	0xd0
 };

 /* ------------------------------------------------------------------------ */

 static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	u8 buf[2];

 	if (reg >= sizeof(buf))
 		return 0xff;
 	i2c_master_recv(client, buf, 2);
 	return buf[reg];
 }

 /* ------------------------------------------------------------------------ */

 static void upd64031a_write(struct v4l2_subdev *sd, u8 reg, u8 val)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	u8 buf[2];

 	buf[0] = reg;
 	buf[1] = val;
 	v4l2_dbg(1, debug, sd, "write reg: %02X val: %02X\n", reg, val);
 	if (i2c_master_send(client, buf, 2) != 2)
 		v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
 }

 /* ------------------------------------------------------------------------ */

 /* The input changed due to new input or channel changed */
 static int upd64031a_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq)
 {
 	struct upd64031a_state *state = to_state(sd);
 	u8 reg = state->regs[R00];

 	v4l2_dbg(1, debug, sd, "changed input or channel\n");
 	upd64031a_write(sd, R00, reg | 0x10);
 	upd64031a_write(sd, R00, reg & ~0x10);
 	return 0;
 }

 /* ------------------------------------------------------------------------ */

 static int upd64031a_s_routing(struct v4l2_subdev *sd,
 			       u32 input, u32 output, u32 config)
 {
 	struct upd64031a_state *state = to_state(sd);
 	u8 r00, r05, r08;

 	state->gr_mode = (input & 3) << 6;
 	state->direct_3dycs_connect = (input & 0xc) << 4;
 	state->ext_comp_sync =
 		(input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
 	state->ext_vert_sync =
 		(input & UPD64031A_VERTICAL_EXTERNAL) << 2;
 	r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
 	r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
 		state->ext_comp_sync | state->ext_vert_sync;
 	r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
 		state->direct_3dycs_connect;
 	upd64031a_write(sd, R00, r00);
 	upd64031a_write(sd, R05, r05);
 	upd64031a_write(sd, R08, r08);
 	return upd64031a_s_frequency(sd, NULL);
 }

 static int upd64031a_log_status(struct v4l2_subdev *sd)
 {
 	v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n",
 			upd64031a_read(sd, 0), upd64031a_read(sd, 1));
 	return 0;
 }

 #ifdef CPTCFG_VIDEO_ADV_DEBUG
 static int upd64031a_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
 {
 	reg->val = upd64031a_read(sd, reg->reg & 0xff);
 	reg->size = 1;
 	return 0;
 }

 static int upd64031a_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
 {
 	upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff);
 	return 0;
 }
 #endif

 /* ----------------------------------------------------------------------- */

 static const struct v4l2_subdev_core_ops upd64031a_core_ops = {
 	.log_status = upd64031a_log_status,
 #ifdef CPTCFG_VIDEO_ADV_DEBUG
 	.g_register = upd64031a_g_register,
 	.s_register = upd64031a_s_register,
 #endif
 };

 static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = {
 	.s_frequency = upd64031a_s_frequency,
 };

 static const struct v4l2_subdev_video_ops upd64031a_video_ops = {
 	.s_routing = upd64031a_s_routing,
 };

 static const struct v4l2_subdev_ops upd64031a_ops = {
 	.core = &upd64031a_core_ops,
 	.tuner = &upd64031a_tuner_ops,
 	.video = &upd64031a_video_ops,
 };

 /* ------------------------------------------------------------------------ */

 /* i2c implementation */

 static int upd64031a_probe(struct i2c_client *client,
 			   const struct i2c_device_id *id)
 {
 	struct upd64031a_state *state;
 	struct v4l2_subdev *sd;
 	int i;

 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 		return -EIO;

 	v4l_info(client, "chip found @ 0x%x (%s)\n",
 			client->addr << 1, client->adapter->name);

 	state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
 	if (state == NULL)
 		return -ENOMEM;
 	sd = &state->sd;
 	v4l2_i2c_subdev_init(sd, client, &upd64031a_ops);
 	memcpy(state->regs, upd64031a_init, sizeof(state->regs));
 	state->gr_mode = UPD64031A_GR_ON << 6;
 	state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
 	state->ext_comp_sync = state->ext_vert_sync = 0;
 	for (i = 0; i < TOT_REGS; i++)
 		upd64031a_write(sd, i, state->regs[i]);
 	return 0;
 }

 static int upd64031a_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);

 	v4l2_device_unregister_subdev(sd);
 	return 0;
 }

 /* ----------------------------------------------------------------------- */

 static const struct i2c_device_id upd64031a_id[] = {
 	{ "upd64031a", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, upd64031a_id);

 static struct i2c_driver upd64031a_driver = {
 	.driver = {
 		.name	= "upd64031a",
 	},
 	.probe		= upd64031a_probe,
 	.remove		= upd64031a_remove,
 	.id_table	= upd64031a_id,
 };

 module_i2c_driver(upd64031a_driver);
	/*
	* upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan
	*
	* 2003 by T.Adachi <tadachi@tadachi-net.com>
	* 2003 by Takeru KOMORIYA <komoriya@paken.org>
	* 2006 by Hans Verkuil <hverkuil@xs4all.nl>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/


	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/i2c.h>
	#include <linux/videodev2.h>
	#include <linux/slab.h>
	#include <media/v4l2-device.h>
	#include <media/i2c/upd64031a.h>

	/* --------------------- read registers functions define -------------------- */

	/* bit masks */
	#define GR_MODE_MASK 0xc0
	#define DIRECT_3DYCS_CONNECT_MASK 0xc0
	#define SYNC_CIRCUIT_MASK 0xa0

	/* -------------------------------------------------------------------------- */

	MODULE_DESCRIPTION("uPD64031A driver");
	MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
	MODULE_LICENSE("GPL");

	static int debug;
	module_param(debug, int, 0644);

	MODULE_PARM_DESC(debug, "Debug level (0-1)");


	enum {
	R00 = 0, R01, R02, R03, R04,
	R05, R06, R07, R08, R09,
	R0A, R0B, R0C, R0D, R0E, R0F,
	/* unused registers
	R10, R11, R12, R13, R14,
	R15, R16, R17,
	*/
	TOT_REGS
	};

	struct upd64031a_state {
	struct v4l2_subdev sd;
	u8 regs[TOT_REGS];
	u8 gr_mode;
	u8 direct_3dycs_connect;
	u8 ext_comp_sync;
	u8 ext_vert_sync;
	};

	static inline struct upd64031a_state to_state(struct v4l2_subdev sd)
	{
	return container_of(sd, struct upd64031a_state, sd);
	}

	static u8 upd64031a_init[] = {
	0x00, 0xb8, 0x48, 0xd2, 0xe6,
	0x03, 0x10, 0x0b, 0xaf, 0x7f,
	0x00, 0x00, 0x1d, 0x5e, 0x00,
	0xd0
	};

	/* ------------------------------------------------------------------------ */

	static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u8 buf[2];

	if (reg >= sizeof(buf))
	return 0xff;
	i2c_master_recv(client, buf, 2);
	return buf[reg];
	}

	/* ------------------------------------------------------------------------ */

	static void upd64031a_write(struct v4l2_subdev *sd, u8 reg, u8 val)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u8 buf[2];

	buf[0] = reg;
	buf[1] = val;
	v4l2_dbg(1, debug, sd, "write reg: %02X val: %02X\n", reg, val);
	if (i2c_master_send(client, buf, 2) != 2)
	v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
	}

	/* ------------------------------------------------------------------------ */

	/* The input changed due to new input or channel changed */
	static int upd64031a_s_frequency(struct v4l2_subdev sd, const struct v4l2_frequency freq)
	{
	struct upd64031a_state *state = to_state(sd);
	u8 reg = state->regs[R00];

	v4l2_dbg(1, debug, sd, "changed input or channel\n");
	upd64031a_write(sd, R00, reg \| 0x10);
	upd64031a_write(sd, R00, reg & ~0x10);
	return 0;
	}

	/* ------------------------------------------------------------------------ */

	static int upd64031a_s_routing(struct v4l2_subdev *sd,
	u32 input, u32 output, u32 config)
	{
	struct upd64031a_state *state = to_state(sd);
	u8 r00, r05, r08;

	state->gr_mode = (input & 3) << 6;
	state->direct_3dycs_connect = (input & 0xc) << 4;
	state->ext_comp_sync =
	(input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
	state->ext_vert_sync =
	(input & UPD64031A_VERTICAL_EXTERNAL) << 2;
	r00 = (state->regs[R00] & ~GR_MODE_MASK) \| state->gr_mode;
	r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) \|
	state->ext_comp_sync \| state->ext_vert_sync;
	r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) \|
	state->direct_3dycs_connect;
	upd64031a_write(sd, R00, r00);
	upd64031a_write(sd, R05, r05);
	upd64031a_write(sd, R08, r08);
	return upd64031a_s_frequency(sd, NULL);
	}

	static int upd64031a_log_status(struct v4l2_subdev *sd)
	{
	v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n",
	upd64031a_read(sd, 0), upd64031a_read(sd, 1));
	return 0;
	}

	#ifdef CPTCFG_VIDEO_ADV_DEBUG
	static int upd64031a_g_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)
	{
	reg->val = upd64031a_read(sd, reg->reg & 0xff);
	reg->size = 1;
	return 0;
	}

	static int upd64031a_s_register(struct v4l2_subdev sd, const struct v4l2_dbg_register reg)
	{
	upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff);
	return 0;
	}
	#endif

	/* ----------------------------------------------------------------------- */

	static const struct v4l2_subdev_core_ops upd64031a_core_ops = {
	.log_status = upd64031a_log_status,
	#ifdef CPTCFG_VIDEO_ADV_DEBUG
	.g_register = upd64031a_g_register,
	.s_register = upd64031a_s_register,
	#endif
	};

	static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = {
	.s_frequency = upd64031a_s_frequency,
	};

	static const struct v4l2_subdev_video_ops upd64031a_video_ops = {
	.s_routing = upd64031a_s_routing,
	};

	static const struct v4l2_subdev_ops upd64031a_ops = {
	.core = &upd64031a_core_ops,
	.tuner = &upd64031a_tuner_ops,
	.video = &upd64031a_video_ops,
	};

	/* ------------------------------------------------------------------------ */

	/* i2c implementation */

	static int upd64031a_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct upd64031a_state *state;
	struct v4l2_subdev *sd;
	int i;

	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	return -EIO;

	v4l_info(client, "chip found @ 0x%x (%s)\n",
	client->addr << 1, client->adapter->name);

	state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
	if (state == NULL)
	return -ENOMEM;
	sd = &state->sd;
	v4l2_i2c_subdev_init(sd, client, &upd64031a_ops);
	memcpy(state->regs, upd64031a_init, sizeof(state->regs));
	state->gr_mode = UPD64031A_GR_ON << 6;
	state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
	state->ext_comp_sync = state->ext_vert_sync = 0;
	for (i = 0; i < TOT_REGS; i++)
	upd64031a_write(sd, i, state->regs[i]);
	return 0;
	}

	static int upd64031a_remove(struct i2c_client *client)
	{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

	v4l2_device_unregister_subdev(sd);
	return 0;
	}

	/* ----------------------------------------------------------------------- */

	static const struct i2c_device_id upd64031a_id[] = {
	{ "upd64031a", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, upd64031a_id);

	static struct i2c_driver upd64031a_driver = {
	.driver = {
	.name = "upd64031a",
	},
	.probe = upd64031a_probe,
	.remove = upd64031a_remove,
	.id_table = upd64031a_id,
	};

	module_i2c_driver(upd64031a_driver);