drivers/media/video/upd64083.c - kernel/msm - Gitiles

 /*
  * 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/version.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/i2c.h>
 #include <linux/videodev2.h>
 #include <media/v4l2-common.h>
 #include <media/upd64083.h>

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

 static int debug = 0;
 module_param(debug, bool, 0644);

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

 static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 1, I2C_CLIENT_END };


 I2C_CLIENT_INSMOD;

 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 {
 	u8 mode;
 	u8 ext_y_adc;
 	u8 regs[TOT_REGS];
 };

 /* 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_log_status(struct i2c_client *client)
 {
 	u8 buf[7];

 	i2c_master_recv(client, buf, 7);
 	v4l_info(client, "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]);
 }

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

 static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
 {
 	u8 buf[2];

 	buf[0] = reg;
 	buf[1] = val;
 	v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val);
 	if (i2c_master_send(client, buf, 2) != 2)
 		v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
 }

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

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

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

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

 static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg)
 {
 	struct upd64083_state *state = i2c_get_clientdata(client);
 	struct v4l2_routing *route = arg;

 	switch (cmd) {
 	case VIDIOC_INT_G_VIDEO_ROUTING:
 		route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
 		route->output = 0;
 		break;

 	case VIDIOC_INT_S_VIDEO_ROUTING:
 	{
 		u8 r00, r02;

 		if (route->input > 7 || (route->input & 6) == 6)
 			return -EINVAL;
 		state->mode = (route->input & 3) << 6;
 		state->ext_y_adc = (route->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(client, R00, r00);
 		upd64083_write(client, R02, r02);
 		break;
 	}

 	case VIDIOC_LOG_STATUS:
 		upd64083_log_status(client);
 		break;

 #ifdef CONFIG_VIDEO_ADV_DEBUG
 	case VIDIOC_DBG_G_REGISTER:
 	case VIDIOC_DBG_S_REGISTER:
 	{
 		struct v4l2_register *reg = arg;

 		if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
 			return -EINVAL;
 		if (!capable(CAP_SYS_ADMIN))
 			return -EPERM;
 		if (cmd == VIDIOC_DBG_G_REGISTER)
 			reg->val = upd64083_read(client, reg->reg & 0xff);
 		else
 			upd64083_write(client, reg->reg & 0xff, reg->val & 0xff);
 		break;
 	}
 #endif
 	default:
 		break;
 	}

 	return 0;
 }

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

 /* i2c implementation */

 static struct i2c_driver i2c_driver;

 static int upd64083_attach(struct i2c_adapter *adapter, int address, int kind)
 {
 	struct i2c_client *client;
 	struct upd64083_state *state;
 	int i;

 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 		return 0;

 	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 	if (client == NULL) {
 		return -ENOMEM;
 	}

 	client->addr = address;
 	client->adapter = adapter;
 	client->driver = &i2c_driver;
 	snprintf(client->name, sizeof(client->name) - 1, "uPD64083");

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

 	state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
 	if (state == NULL) {
 		kfree(client);
 		return -ENOMEM;
 	}
 	i2c_set_clientdata(client, state);
 	/* 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(client, i, state->regs[i]);
 	}
 	i2c_attach_client(client);

 	return 0;
 }

 static int upd64083_probe(struct i2c_adapter *adapter)
 {
 	if (adapter->class & I2C_CLASS_TV_ANALOG)
 		return i2c_probe(adapter, &addr_data, upd64083_attach);
 	return 0;
 }

 static int upd64083_detach(struct i2c_client *client)
 {
 	int err;

 	err = i2c_detach_client(client);
 	if (err)
 		return err;

 	kfree(client);
 	return 0;
 }

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

 /* i2c implementation */
 static struct i2c_driver i2c_driver = {
 	.driver = {
 		.name = "upd64083",
 	},
 	.id = I2C_DRIVERID_UPD64083,
 	.attach_adapter = upd64083_probe,
 	.detach_client  = upd64083_detach,
 	.command = upd64083_command,
 };


 static int __init upd64083_init_module(void)
 {
 	return i2c_add_driver(&i2c_driver);
 }

 static void __exit upd64083_exit_module(void)
 {
 	i2c_del_driver(&i2c_driver);
 }

 module_init(upd64083_init_module);
 module_exit(upd64083_exit_module);
	/*
	* 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/version.h>
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/i2c.h>
	#include <linux/videodev2.h>
	#include <media/v4l2-common.h>
	#include <media/upd64083.h>

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

	static int debug = 0;
	module_param(debug, bool, 0644);

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

	static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 1, I2C_CLIENT_END };


	I2C_CLIENT_INSMOD;

	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 {
	u8 mode;
	u8 ext_y_adc;
	u8 regs[TOT_REGS];
	};

	/* 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_log_status(struct i2c_client *client)
	{
	u8 buf[7];

	i2c_master_recv(client, buf, 7);
	v4l_info(client, "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]);
	}

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

	static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
	{
	u8 buf[2];

	buf[0] = reg;
	buf[1] = val;
	v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val);
	if (i2c_master_send(client, buf, 2) != 2)
	v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
	}

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

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

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

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

	static int upd64083_command(struct i2c_client client, unsigned int cmd, void arg)
	{
	struct upd64083_state *state = i2c_get_clientdata(client);
	struct v4l2_routing *route = arg;

	switch (cmd) {
	case VIDIOC_INT_G_VIDEO_ROUTING:
	route->input = (state->mode >> 6) \| (state->ext_y_adc >> 3);
	route->output = 0;
	break;

	case VIDIOC_INT_S_VIDEO_ROUTING:
	{
	u8 r00, r02;

	if (route->input > 7 \|\| (route->input & 6) == 6)
	return -EINVAL;
	state->mode = (route->input & 3) << 6;
	state->ext_y_adc = (route->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(client, R00, r00);
	upd64083_write(client, R02, r02);
	break;
	}

	case VIDIOC_LOG_STATUS:
	upd64083_log_status(client);
	break;

	#ifdef CONFIG_VIDEO_ADV_DEBUG
	case VIDIOC_DBG_G_REGISTER:
	case VIDIOC_DBG_S_REGISTER:
	{
	struct v4l2_register *reg = arg;

	if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
	return -EINVAL;
	if (!capable(CAP_SYS_ADMIN))
	return -EPERM;
	if (cmd == VIDIOC_DBG_G_REGISTER)
	reg->val = upd64083_read(client, reg->reg & 0xff);
	else
	upd64083_write(client, reg->reg & 0xff, reg->val & 0xff);
	break;
	}
	#endif
	default:
	break;
	}

	return 0;
	}

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

	/* i2c implementation */

	static struct i2c_driver i2c_driver;

	static int upd64083_attach(struct i2c_adapter *adapter, int address, int kind)
	{
	struct i2c_client *client;
	struct upd64083_state *state;
	int i;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	return 0;

	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (client == NULL) {
	return -ENOMEM;
	}

	client->addr = address;
	client->adapter = adapter;
	client->driver = &i2c_driver;
	snprintf(client->name, sizeof(client->name) - 1, "uPD64083");

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

	state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
	if (state == NULL) {
	kfree(client);
	return -ENOMEM;
	}
	i2c_set_clientdata(client, state);
	/* 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(client, i, state->regs[i]);
	}
	i2c_attach_client(client);

	return 0;
	}

	static int upd64083_probe(struct i2c_adapter *adapter)
	{
	if (adapter->class & I2C_CLASS_TV_ANALOG)
	return i2c_probe(adapter, &addr_data, upd64083_attach);
	return 0;
	}

	static int upd64083_detach(struct i2c_client *client)
	{
	int err;

	err = i2c_detach_client(client);
	if (err)
	return err;

	kfree(client);
	return 0;
	}

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

	/* i2c implementation */
	static struct i2c_driver i2c_driver = {
	.driver = {
	.name = "upd64083",
	},
	.id = I2C_DRIVERID_UPD64083,
	.attach_adapter = upd64083_probe,
	.detach_client = upd64083_detach,
	.command = upd64083_command,
	};


	static int __init upd64083_init_module(void)
	{
	return i2c_add_driver(&i2c_driver);
	}

	static void __exit upd64083_exit_module(void)
	{
	i2c_del_driver(&i2c_driver);
	}

	module_init(upd64083_init_module);
	module_exit(upd64083_exit_module);