drivers/media/video/upd64031a.c - kernel/msm - Gitiles

 /*
  * 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/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/v4l2-chip-ident.h>
 #include <media/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 = 0;
 module_param(debug, int, 0644);

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

 static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 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,
 	/* unused registers
 	 R10, R11, R12, R13, R14,
 	 R15, R16, R17,
 	 */
 	TOT_REGS
 };

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

 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 i2c_client *client, u8 reg)
 {
 	u8 buf[2];

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

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

 static void upd64031a_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);
 }

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

 /* The input changed due to new input or channel changed */
 static void upd64031a_change(struct i2c_client *client)
 {
 	struct upd64031a_state *state = i2c_get_clientdata(client);
 	u8 reg = state->regs[R00];

 	v4l_dbg(1, debug, client, "changed input or channel\n");
 	upd64031a_write(client, R00, reg | 0x10);
 	upd64031a_write(client, R00, reg & ~0x10);
 }

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

 static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
 {
 	struct upd64031a_state *state = i2c_get_clientdata(client);
 	struct v4l2_routing *route = arg;

 	switch (cmd) {
 	case VIDIOC_S_FREQUENCY:
 		upd64031a_change(client);
 		break;

 	case VIDIOC_INT_G_VIDEO_ROUTING:
 		route->input = (state->gr_mode >> 6) |
 			(state->direct_3dycs_connect >> 4) |
 			(state->ext_comp_sync >> 1) |
 			(state->ext_vert_sync >> 2);
 		route->output = 0;
 		break;

 	case VIDIOC_INT_S_VIDEO_ROUTING:
 	{
 		u8 r00, r05, r08;

 		state->gr_mode = (route->input & 3) << 6;
 		state->direct_3dycs_connect = (route->input & 0xc) << 4;
 		state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
 		state->ext_vert_sync = (route->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(client, R00, r00);
 		upd64031a_write(client, R05, r05);
 		upd64031a_write(client, R08, r08);
 		upd64031a_change(client);
 		break;
 	}

 	case VIDIOC_LOG_STATUS:
 		v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
 			upd64031a_read(client, 0), upd64031a_read(client, 1));
 		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 = upd64031a_read(client, reg->reg & 0xff);
 		else
 			upd64031a_write(client, reg->reg & 0xff, reg->val & 0xff);
 		break;
 	}
 #endif

 	case VIDIOC_G_CHIP_IDENT:
 		return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64031A, 0);

 	default:
 		break;
 	}
 	return 0;
 }

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

 /* i2c implementation */

 static struct i2c_driver i2c_driver;

 static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind)
 {
 	struct i2c_client *client;
 	struct upd64031a_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, "uPD64031A");

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

 	state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
 	if (state == NULL) {
 		kfree(client);
 		return -ENOMEM;
 	}
 	i2c_set_clientdata(client, state);
 	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(client, i, state->regs[i]);
 	}

 	i2c_attach_client(client);

 	return 0;
 }

 static int upd64031a_probe(struct i2c_adapter *adapter)
 {
 	if (adapter->class & I2C_CLASS_TV_ANALOG)
 		return i2c_probe(adapter, &addr_data, upd64031a_attach);
 	return 0;
 }

 static int upd64031a_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 = "upd64031a",
 	},
 	.id = I2C_DRIVERID_UPD64031A,
 	.attach_adapter = upd64031a_probe,
 	.detach_client  = upd64031a_detach,
 	.command = upd64031a_command,
 };


 static int __init upd64031a_init_module(void)
 {
 	return i2c_add_driver(&i2c_driver);
 }

 static void __exit upd64031a_exit_module(void)
 {
 	i2c_del_driver(&i2c_driver);
 }

 module_init(upd64031a_init_module);
 module_exit(upd64031a_exit_module);
	/*
	* 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/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/v4l2-chip-ident.h>
	#include <media/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 = 0;
	module_param(debug, int, 0644);

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

	static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 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,
	/* unused registers
	R10, R11, R12, R13, R14,
	R15, R16, R17,
	*/
	TOT_REGS
	};

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

	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 i2c_client *client, u8 reg)
	{
	u8 buf[2];

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

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

	static void upd64031a_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);
	}

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

	/* The input changed due to new input or channel changed */
	static void upd64031a_change(struct i2c_client *client)
	{
	struct upd64031a_state *state = i2c_get_clientdata(client);
	u8 reg = state->regs[R00];

	v4l_dbg(1, debug, client, "changed input or channel\n");
	upd64031a_write(client, R00, reg \| 0x10);
	upd64031a_write(client, R00, reg & ~0x10);
	}

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

	static int upd64031a_command(struct i2c_client client, unsigned int cmd, void arg)
	{
	struct upd64031a_state *state = i2c_get_clientdata(client);
	struct v4l2_routing *route = arg;

	switch (cmd) {
	case VIDIOC_S_FREQUENCY:
	upd64031a_change(client);
	break;

	case VIDIOC_INT_G_VIDEO_ROUTING:
	route->input = (state->gr_mode >> 6) \|
	(state->direct_3dycs_connect >> 4) \|
	(state->ext_comp_sync >> 1) \|
	(state->ext_vert_sync >> 2);
	route->output = 0;
	break;

	case VIDIOC_INT_S_VIDEO_ROUTING:
	{
	u8 r00, r05, r08;

	state->gr_mode = (route->input & 3) << 6;
	state->direct_3dycs_connect = (route->input & 0xc) << 4;
	state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
	state->ext_vert_sync = (route->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(client, R00, r00);
	upd64031a_write(client, R05, r05);
	upd64031a_write(client, R08, r08);
	upd64031a_change(client);
	break;
	}

	case VIDIOC_LOG_STATUS:
	v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
	upd64031a_read(client, 0), upd64031a_read(client, 1));
	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 = upd64031a_read(client, reg->reg & 0xff);
	else
	upd64031a_write(client, reg->reg & 0xff, reg->val & 0xff);
	break;
	}
	#endif

	case VIDIOC_G_CHIP_IDENT:
	return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64031A, 0);

	default:
	break;
	}
	return 0;
	}

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

	/* i2c implementation */

	static struct i2c_driver i2c_driver;

	static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind)
	{
	struct i2c_client *client;
	struct upd64031a_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, "uPD64031A");

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

	state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
	if (state == NULL) {
	kfree(client);
	return -ENOMEM;
	}
	i2c_set_clientdata(client, state);
	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(client, i, state->regs[i]);
	}

	i2c_attach_client(client);

	return 0;
	}

	static int upd64031a_probe(struct i2c_adapter *adapter)
	{
	if (adapter->class & I2C_CLASS_TV_ANALOG)
	return i2c_probe(adapter, &addr_data, upd64031a_attach);
	return 0;
	}

	static int upd64031a_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 = "upd64031a",
	},
	.id = I2C_DRIVERID_UPD64031A,
	.attach_adapter = upd64031a_probe,
	.detach_client = upd64031a_detach,
	.command = upd64031a_command,
	};


	static int __init upd64031a_init_module(void)
	{
	return i2c_add_driver(&i2c_driver);
	}

	static void __exit upd64031a_exit_module(void)
	{
	i2c_del_driver(&i2c_driver);
	}

	module_init(upd64031a_init_module);
	module_exit(upd64031a_exit_module);