drivers/media/video/upd64083.c - maze/linux - Git at Google

 /*
  * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
  *
  * 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., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, 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/v4l2-chip-ident.h>
 #include <media/upd64083.h>

 MODULE_DESCRIPTION("uPD64083 driver");
 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
 MODULE_LICENSE("GPL");

 static bool debug;
 module_param(debug, bool, 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,
 	R10, R11, R12, R13, R14,
 	R15, R16,
 	TOT_REGS
 };

 struct upd64083_state {
 	struct v4l2_subdev sd;
 	u8 mode;
 	u8 ext_y_adc;
 	u8 regs[TOT_REGS];
 };

 static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)
 {
 	return container_of(sd, struct upd64083_state, sd);
 }

 /* Initial values when used in combination with the
    NEC upd64031a ghost reduction chip. */
 static u8 upd64083_init[] = {
 	0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
 	0x36, 0xdd, 0x05, 0x56, 0x48,
 	0x00, 0x3a, 0xa0, 0x05, 0x08,
 	0x44, 0x60, 0x08, 0x52, 0xf8,
 	0x53, 0x60, 0x10
 };

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

 static void upd64083_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);
 }

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

 #ifdef CONFIG_VIDEO_ADV_DEBUG
 static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	u8 buf[7];

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

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

 static int upd64083_s_routing(struct v4l2_subdev *sd,
 			      u32 input, u32 output, u32 config)
 {
 	struct upd64083_state *state = to_state(sd);
 	u8 r00, r02;

 	if (input > 7 || (input & 6) == 6)
 		return -EINVAL;
 	state->mode = (input & 3) << 6;
 	state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3;
 	r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
 	r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
 	upd64083_write(sd, R00, r00);
 	upd64083_write(sd, R02, r02);
 	return 0;
 }

 #ifdef CONFIG_VIDEO_ADV_DEBUG
 static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);

 	if (!v4l2_chip_match_i2c_client(client, &reg->match))
 		return -EINVAL;
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 	reg->val = upd64083_read(sd, reg->reg & 0xff);
 	reg->size = 1;
 	return 0;
 }

 static int upd64083_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);

 	if (!v4l2_chip_match_i2c_client(client, &reg->match))
 		return -EINVAL;
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 	upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
 	return 0;
 }
 #endif

 static int upd64083_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);

 	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64083, 0);
 }

 static int upd64083_log_status(struct v4l2_subdev *sd)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	u8 buf[7];

 	i2c_master_recv(client, buf, 7);
 	v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
 		      "SA04=%02x SA05=%02x SA06=%02x\n",
 		buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
 	return 0;
 }

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

 static const struct v4l2_subdev_core_ops upd64083_core_ops = {
 	.log_status = upd64083_log_status,
 	.g_chip_ident = upd64083_g_chip_ident,
 #ifdef CONFIG_VIDEO_ADV_DEBUG
 	.g_register = upd64083_g_register,
 	.s_register = upd64083_s_register,
 #endif
 };

 static const struct v4l2_subdev_video_ops upd64083_video_ops = {
 	.s_routing = upd64083_s_routing,
 };

 static const struct v4l2_subdev_ops upd64083_ops = {
 	.core = &upd64083_core_ops,
 	.video = &upd64083_video_ops,
 };

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

 /* i2c implementation */

 static int upd64083_probe(struct i2c_client *client,
 			  const struct i2c_device_id *id)
 {
 	struct upd64083_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 = kzalloc(sizeof(struct upd64083_state), GFP_KERNEL);
 	if (state == NULL)
 		return -ENOMEM;
 	sd = &state->sd;
 	v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
 	/* Initially assume that a ghost reduction chip is present */
 	state->mode = 0;  /* YCS mode */
 	state->ext_y_adc = (1 << 5);
 	memcpy(state->regs, upd64083_init, TOT_REGS);
 	for (i = 0; i < TOT_REGS; i++)
 		upd64083_write(sd, i, state->regs[i]);
 	return 0;
 }

 static int upd64083_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);

 	v4l2_device_unregister_subdev(sd);
 	kfree(to_state(sd));
 	return 0;
 }

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

 static const struct i2c_device_id upd64083_id[] = {
 	{ "upd64083", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, upd64083_id);

 static struct i2c_driver upd64083_driver = {
 	.driver = {
 		.owner	= THIS_MODULE,
 		.name	= "upd64083",
 	},
 	.probe		= upd64083_probe,
 	.remove		= upd64083_remove,
 	.id_table	= upd64083_id,
 };

 module_i2c_driver(upd64083_driver);
	/*
	* upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
	*
	* 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., 51 Franklin Street, Fifth Floor, Boston, MA
	* 02110-1301, 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/v4l2-chip-ident.h>
	#include <media/upd64083.h>

	MODULE_DESCRIPTION("uPD64083 driver");
	MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
	MODULE_LICENSE("GPL");

	static bool debug;
	module_param(debug, bool, 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,
	R10, R11, R12, R13, R14,
	R15, R16,
	TOT_REGS
	};

	struct upd64083_state {
	struct v4l2_subdev sd;
	u8 mode;
	u8 ext_y_adc;
	u8 regs[TOT_REGS];
	};

	static inline struct upd64083_state to_state(struct v4l2_subdev sd)
	{
	return container_of(sd, struct upd64083_state, sd);
	}

	/* Initial values when used in combination with the
	NEC upd64031a ghost reduction chip. */
	static u8 upd64083_init[] = {
	0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */
	0x36, 0xdd, 0x05, 0x56, 0x48,
	0x00, 0x3a, 0xa0, 0x05, 0x08,
	0x44, 0x60, 0x08, 0x52, 0xf8,
	0x53, 0x60, 0x10
	};

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

	static void upd64083_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);
	}

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

	#ifdef CONFIG_VIDEO_ADV_DEBUG
	static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u8 buf[7];

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

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

	static int upd64083_s_routing(struct v4l2_subdev *sd,
	u32 input, u32 output, u32 config)
	{
	struct upd64083_state *state = to_state(sd);
	u8 r00, r02;

	if (input > 7 \|\| (input & 6) == 6)
	return -EINVAL;
	state->mode = (input & 3) << 6;
	state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3;
	r00 = (state->regs[R00] & ~(3 << 6)) \| state->mode;
	r02 = (state->regs[R02] & ~(1 << 5)) \| state->ext_y_adc;
	upd64083_write(sd, R00, r00);
	upd64083_write(sd, R02, r02);
	return 0;
	}

	#ifdef CONFIG_VIDEO_ADV_DEBUG
	static int upd64083_g_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (!v4l2_chip_match_i2c_client(client, &reg->match))
	return -EINVAL;
	if (!capable(CAP_SYS_ADMIN))
	return -EPERM;
	reg->val = upd64083_read(sd, reg->reg & 0xff);
	reg->size = 1;
	return 0;
	}

	static int upd64083_s_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (!v4l2_chip_match_i2c_client(client, &reg->match))
	return -EINVAL;
	if (!capable(CAP_SYS_ADMIN))
	return -EPERM;
	upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
	return 0;
	}
	#endif

	static int upd64083_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64083, 0);
	}

	static int upd64083_log_status(struct v4l2_subdev *sd)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u8 buf[7];

	i2c_master_recv(client, buf, 7);
	v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
	"SA04=%02x SA05=%02x SA06=%02x\n",
	buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
	return 0;
	}

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

	static const struct v4l2_subdev_core_ops upd64083_core_ops = {
	.log_status = upd64083_log_status,
	.g_chip_ident = upd64083_g_chip_ident,
	#ifdef CONFIG_VIDEO_ADV_DEBUG
	.g_register = upd64083_g_register,
	.s_register = upd64083_s_register,
	#endif
	};

	static const struct v4l2_subdev_video_ops upd64083_video_ops = {
	.s_routing = upd64083_s_routing,
	};

	static const struct v4l2_subdev_ops upd64083_ops = {
	.core = &upd64083_core_ops,
	.video = &upd64083_video_ops,
	};

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

	/* i2c implementation */

	static int upd64083_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct upd64083_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 = kzalloc(sizeof(struct upd64083_state), GFP_KERNEL);
	if (state == NULL)
	return -ENOMEM;
	sd = &state->sd;
	v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
	/* Initially assume that a ghost reduction chip is present */
	state->mode = 0; /* YCS mode */
	state->ext_y_adc = (1 << 5);
	memcpy(state->regs, upd64083_init, TOT_REGS);
	for (i = 0; i < TOT_REGS; i++)
	upd64083_write(sd, i, state->regs[i]);
	return 0;
	}

	static int upd64083_remove(struct i2c_client *client)
	{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

	v4l2_device_unregister_subdev(sd);
	kfree(to_state(sd));
	return 0;
	}

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

	static const struct i2c_device_id upd64083_id[] = {
	{ "upd64083", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, upd64083_id);

	static struct i2c_driver upd64083_driver = {
	.driver = {
	.owner = THIS_MODULE,
	.name = "upd64083",
	},
	.probe = upd64083_probe,
	.remove = upd64083_remove,
	.id_table = upd64083_id,
	};

	module_i2c_driver(upd64083_driver);