drivers/media/video/vpx3220.c - kernel/msm-4.9 - Gitiles

 /*
  * vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
  *
  * Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
  *
  * 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/init.h>
 #include <linux/delay.h>
 #include <linux/types.h>
 #include <linux/slab.h>

 #include <linux/byteorder/swab.h>

 #include <asm/io.h>
 #include <asm/uaccess.h>

 #include <linux/i2c.h>
 #include <linux/i2c-dev.h>

 #define I2C_NAME(x) (x)->name

 #include <linux/videodev.h>
 #include <linux/video_decoder.h>

 #define I2C_VPX3220        0x86
 #define VPX3220_DEBUG	KERN_DEBUG "vpx3220: "

 static int debug = 0;
 module_param(debug, int, 0);
 MODULE_PARM_DESC(debug, "Debug level (0-1)");

 #define dprintk(num, format, args...) \
 	do { \
 		if (debug >= num) \
 			printk(format, ##args); \
 	} while (0)

 #define VPX_TIMEOUT_COUNT  10

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

 struct vpx3220 {
 	unsigned char reg[255];

 	int norm;
 	int input;
 	int enable;
 	int bright;
 	int contrast;
 	int hue;
 	int sat;
 };

 static char *inputs[] = { "internal", "composite", "svideo" };

 /* ----------------------------------------------------------------------- */
 static inline int
 vpx3220_write (struct i2c_client *client,
 	       u8                 reg,
 	       u8                 value)
 {
 	struct vpx3220 *decoder = i2c_get_clientdata(client);

 	decoder->reg[reg] = value;
 	return i2c_smbus_write_byte_data(client, reg, value);
 }

 static inline int
 vpx3220_read (struct i2c_client *client,
 	      u8                 reg)
 {
 	return i2c_smbus_read_byte_data(client, reg);
 }

 static int
 vpx3220_fp_status (struct i2c_client *client)
 {
 	unsigned char status;
 	unsigned int i;

 	for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
 		status = vpx3220_read(client, 0x29);

 		if (!(status & 4))
 			return 0;

 		udelay(10);

 		if (need_resched())
 			cond_resched();
 	}

 	return -1;
 }

 static int
 vpx3220_fp_write (struct i2c_client *client,
 		  u8                 fpaddr,
 		  u16                data)
 {
 	/* Write the 16-bit address to the FPWR register */
 	if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
 		dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 		return -1;
 	}

 	if (vpx3220_fp_status(client) < 0)
 		return -1;

 	/* Write the 16-bit data to the FPDAT register */
 	if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
 		dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 		return -1;
 	}

 	return 0;
 }

 static u16
 vpx3220_fp_read (struct i2c_client *client,
 		 u16                fpaddr)
 {
 	s16 data;

 	/* Write the 16-bit address to the FPRD register */
 	if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
 		dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 		return -1;
 	}

 	if (vpx3220_fp_status(client) < 0)
 		return -1;

 	/* Read the 16-bit data from the FPDAT register */
 	data = i2c_smbus_read_word_data(client, 0x28);
 	if (data == -1) {
 		dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 		return -1;
 	}

 	return swab16(data);
 }

 static int
 vpx3220_write_block (struct i2c_client *client,
 		     const u8          *data,
 		     unsigned int       len)
 {
 	u8 reg;
 	int ret = -1;

 	while (len >= 2) {
 		reg = *data++;
 		if ((ret =
 		     vpx3220_write(client, reg, *data++)) < 0)
 			break;
 		len -= 2;
 	}

 	return ret;
 }

 static int
 vpx3220_write_fp_block (struct i2c_client *client,
 		        const u16         *data,
 		        unsigned int       len)
 {
 	u8 reg;
 	int ret = 0;

 	while (len > 1) {
 		reg = *data++;
 		ret |= vpx3220_fp_write(client, reg, *data++);
 		len -= 2;
 	}

 	return ret;
 }

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

 static const unsigned short init_ntsc[] = {
 	0x1c, 0x00,		/* NTSC tint angle */
 	0x88, 17,		/* Window 1 vertical */
 	0x89, 240,		/* Vertical lines in */
 	0x8a, 240,		/* Vertical lines out */
 	0x8b, 000,		/* Horizontal begin */
 	0x8c, 640,		/* Horizontal length */
 	0x8d, 640,		/* Number of pixels */
 	0x8f, 0xc00,		/* Disable window 2 */
 	0xf0, 0x173,		/* 13.5 MHz transport, Forced
 				 * mode, latch windows */
 	0xf2, 0x13,		/* NTSC M, composite input */
 	0xe7, 0x1e1,		/* Enable vertical standard
 				 * locking @ 240 lines */
 };

 static const unsigned short init_pal[] = {
 	0x88, 23,		/* Window 1 vertical begin */
 	0x89, 288 + 16,		/* Vertical lines in (16 lines
 				 * skipped by the VFE) */
 	0x8a, 288 + 16,		/* Vertical lines out (16 lines
 				 * skipped by the VFE) */
 	0x8b, 16,		/* Horizontal begin */
 	0x8c, 768,		/* Horizontal length */
 	0x8d, 784, 		/* Number of pixels
 				 * Must be >= Horizontal begin + Horizontal length */
 	0x8f, 0xc00,		/* Disable window 2 */
 	0xf0, 0x177,		/* 13.5 MHz transport, Forced
 				 * mode, latch windows */
 	0xf2, 0x3d1,		/* PAL B,G,H,I, composite input */
 	0xe7, 0x261,		/* PAL/SECAM set to 288 + 16 lines
 				 * change to 0x241 for 288 lines */
 };

 static const unsigned short init_secam[] = {
 	0x88, 23  - 16,		/* Window 1 vertical begin */
 	0x89, 288 + 16,		/* Vertical lines in (16 lines
 				 * skipped by the VFE) */
 	0x8a, 288 + 16,		/* Vertical lines out (16 lines
 				 * skipped by the VFE) */
 	0x8b, 16,		/* Horizontal begin */
 	0x8c, 768,		/* Horizontal length */
 	0x8d, 784,		/* Number of pixels
 				 * Must be >= Horizontal begin + Horizontal length */
 	0x8f, 0xc00,		/* Disable window 2 */
 	0xf0, 0x177,		/* 13.5 MHz transport, Forced
 				 * mode, latch windows */
 	0xf2, 0x3d5,		/* SECAM, composite input */
 	0xe7, 0x261,		/* PAL/SECAM set to 288 + 16 lines
 				 * change to 0x241 for 288 lines */
 };

 static const unsigned char init_common[] = {
 	0xf2, 0x00,		/* Disable all outputs */
 	0x33, 0x0d,		/* Luma : VIN2, Chroma : CIN
 				 * (clamp off) */
 	0xd8, 0xa8,		/* HREF/VREF active high, VREF
 				 * pulse = 2, Odd/Even flag */
 	0x20, 0x03,		/* IF compensation 0dB/oct */
 	0xe0, 0xff,		/* Open up all comparators */
 	0xe1, 0x00,
 	0xe2, 0x7f,
 	0xe3, 0x80,
 	0xe4, 0x7f,
 	0xe5, 0x80,
 	0xe6, 0x00,		/* Brightness set to 0 */
 	0xe7, 0xe0,		/* Contrast to 1.0, noise shaping
 				 * 10 to 8 2-bit error diffusion */
 	0xe8, 0xf8,		/* YUV422, CbCr binary offset,
 				 * ... (p.32) */
 	0xea, 0x18,		/* LLC2 connected, output FIFO
 				 * reset with VACTintern */
 	0xf0, 0x8a,		/* Half full level to 10, bus
 				 * shuffler [7:0, 23:16, 15:8] */
 	0xf1, 0x18,		/* Single clock, sync mode, no
 				 * FE delay, no HLEN counter */
 	0xf8, 0x12,		/* Port A, PIXCLK, HF# & FE#
 				 * strength to 2 */
 	0xf9, 0x24,		/* Port B, HREF, VREF, PREF &
 				 * ALPHA strength to 4 */
 };

 static const unsigned short init_fp[] = {
 	0x59, 0,
 	0xa0, 2070,		/* ACC reference */
 	0xa3, 0,
 	0xa4, 0,
 	0xa8, 30,
 	0xb2, 768,
 	0xbe, 27,
 	0x58, 0,
 	0x26, 0,
 	0x4b, 0x298,		/* PLL gain */
 };

 static void
 vpx3220_dump_i2c (struct i2c_client *client)
 {
 	int len = sizeof(init_common);
 	const unsigned char *data = init_common;

 	while (len > 1) {
 		dprintk(1,
 			KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n",
 			*data, vpx3220_read(client, *data));
 		data += 2;
 		len -= 2;
 	}
 }

 static int
 vpx3220_command (struct i2c_client *client,
 		 unsigned int       cmd,
 		 void              *arg)
 {
 	struct vpx3220 *decoder = i2c_get_clientdata(client);

 	switch (cmd) {
 	case 0:
 	{
 		vpx3220_write_block(client, init_common,
 				    sizeof(init_common));
 		vpx3220_write_fp_block(client, init_fp,
 				       sizeof(init_fp) >> 1);
 		switch (decoder->norm) {

 		case VIDEO_MODE_NTSC:
 			vpx3220_write_fp_block(client, init_ntsc,
 					       sizeof(init_ntsc) >> 1);
 			break;

 		case VIDEO_MODE_PAL:
 			vpx3220_write_fp_block(client, init_pal,
 				       	       sizeof(init_pal) >> 1);
 			break;
 		case VIDEO_MODE_SECAM:
 			vpx3220_write_fp_block(client, init_secam,
 					       sizeof(init_secam) >> 1);
 			break;
 		default:
 			vpx3220_write_fp_block(client, init_pal,
 				       	       sizeof(init_pal) >> 1);
 			break;
 		}
 	}
 		break;

 	case DECODER_DUMP:
 	{
 		vpx3220_dump_i2c(client);
 	}
 		break;

 	case DECODER_GET_CAPABILITIES:
 	{
 		struct video_decoder_capability *cap = arg;

 		dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n",
 			I2C_NAME(client));

 		cap->flags = VIDEO_DECODER_PAL |
 			     VIDEO_DECODER_NTSC |
 			     VIDEO_DECODER_SECAM |
 			     VIDEO_DECODER_AUTO |
 			     VIDEO_DECODER_CCIR;
 		cap->inputs = 3;
 		cap->outputs = 1;
 	}
 		break;

 	case DECODER_GET_STATUS:
 	{
 		int res = 0, status;

 		dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n",
 			I2C_NAME(client));

 		status = vpx3220_fp_read(client, 0x0f3);

 		dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client),
 			status);

 		if (status < 0)
 			return status;

 		if ((status & 0x20) == 0) {
 			res |= DECODER_STATUS_GOOD | DECODER_STATUS_COLOR;

 			switch (status & 0x18) {

 			case 0x00:
 			case 0x10:
 			case 0x14:
 			case 0x18:
 				res |= DECODER_STATUS_PAL;
 				break;

 			case 0x08:
 				res |= DECODER_STATUS_SECAM;
 				break;

 			case 0x04:
 			case 0x0c:
 			case 0x1c:
 				res |= DECODER_STATUS_NTSC;
 				break;
 			}
 		}

 		*(int *) arg = res;
 	}
 		break;

 	case DECODER_SET_NORM:
 	{
 		int *iarg = arg, data;

 		dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
 			I2C_NAME(client), *iarg);
 		switch (*iarg) {

 		case VIDEO_MODE_NTSC:
 			vpx3220_write_fp_block(client, init_ntsc,
 					       sizeof(init_ntsc) >> 1);
 			dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
 				I2C_NAME(client));
 			break;

 		case VIDEO_MODE_PAL:
 			vpx3220_write_fp_block(client, init_pal,
 					       sizeof(init_pal) >> 1);
 			dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
 				I2C_NAME(client));
 			break;

 		case VIDEO_MODE_SECAM:
 			vpx3220_write_fp_block(client, init_secam,
 					       sizeof(init_secam) >> 1);
 			dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
 				I2C_NAME(client));
 			break;

 		case VIDEO_MODE_AUTO:
 			/* FIXME This is only preliminary support */
 			data = vpx3220_fp_read(client, 0xf2) & 0x20;
 			vpx3220_fp_write(client, 0xf2, 0x00c0 | data);
 			dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
 				I2C_NAME(client));
 			break;

 		default:
 			return -EINVAL;

 		}
 		decoder->norm = *iarg;
 	}
 		break;

 	case DECODER_SET_INPUT:
 	{
 		int *iarg = arg, data;

 		/* RJ:  *iarg = 0: ST8 (PCTV) input
 		 *iarg = 1: COMPOSITE  input
 		 *iarg = 2: SVHS       input  */

 		const int input[3][2] = {
 			{0x0c, 0},
 			{0x0d, 0},
 			{0x0e, 1}
 		};

 		if (*iarg < 0 || *iarg > 2)
 			return -EINVAL;

 		dprintk(1, KERN_INFO "%s: input switched to %s\n",
 			I2C_NAME(client), inputs[*iarg]);

 		vpx3220_write(client, 0x33, input[*iarg][0]);

 		data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
 		if (data < 0)
 			return data;
 		/* 0x0010 is required to latch the setting */
 		vpx3220_fp_write(client, 0xf2,
 				 data | (input[*iarg][1] << 5) | 0x0010);

 		udelay(10);
 	}
 		break;

 	case DECODER_SET_OUTPUT:
 	{
 		int *iarg = arg;

 		/* not much choice of outputs */
 		if (*iarg != 0) {
 			return -EINVAL;
 		}
 	}
 		break;

 	case DECODER_ENABLE_OUTPUT:
 	{
 		int *iarg = arg;

 		dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
 			I2C_NAME(client), *iarg);

 		vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
 	}
 		break;

 	case DECODER_SET_PICTURE:
 	{
 		struct video_picture *pic = arg;

 		if (decoder->bright != pic->brightness) {
 			/* We want -128 to 128 we get 0-65535 */
 			decoder->bright = pic->brightness;
 			vpx3220_write(client, 0xe6,
 				      (decoder->bright - 32768) >> 8);
 		}
 		if (decoder->contrast != pic->contrast) {
 			/* We want 0 to 64 we get 0-65535 */
 			/* Bit 7 and 8 is for noise shaping */
 			decoder->contrast = pic->contrast;
 			vpx3220_write(client, 0xe7,
 				      (decoder->contrast >> 10) + 192);
 		}
 		if (decoder->sat != pic->colour) {
 			/* We want 0 to 4096 we get 0-65535 */
 			decoder->sat = pic->colour;
 			vpx3220_fp_write(client, 0xa0,
 					 decoder->sat >> 4);
 		}
 		if (decoder->hue != pic->hue) {
 			/* We want -512 to 512 we get 0-65535 */
 			decoder->hue = pic->hue;
 			vpx3220_fp_write(client, 0x1c,
 					 ((decoder->hue - 32768) >> 6) & 0xFFF);
 		}
 	}
 		break;

 	default:
 		return -EINVAL;
 	}

 	return 0;
 }

 static int
 vpx3220_init_client (struct i2c_client *client)
 {
 	vpx3220_write_block(client, init_common, sizeof(init_common));
 	vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
 	/* Default to PAL */
 	vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);

 	return 0;
 }

 /* -----------------------------------------------------------------------
  * Client managment code
  */

 /*
  * Generic i2c probe
  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
  */
 static unsigned short normal_i2c[] =
     { I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
 	I2C_CLIENT_END
 };
 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };

 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };

 static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.normal_i2c_range	= normal_i2c_range,
 	.probe			= probe,
 	.probe_range		= probe_range,
 	.ignore			= ignore,
 	.ignore_range		= ignore_range,
 	.force			= force
 };

 static struct i2c_driver vpx3220_i2c_driver;

 static int
 vpx3220_detach_client (struct i2c_client *client)
 {
 	struct vpx3220 *decoder = i2c_get_clientdata(client);
 	int err;

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

 	kfree(decoder);
 	kfree(client);

 	return 0;
 }

 static int
 vpx3220_detect_client (struct i2c_adapter *adapter,
 		       int                 address,
 		       int                 kind)
 {
 	int err;
 	struct i2c_client *client;
 	struct vpx3220 *decoder;

 	dprintk(1, VPX3220_DEBUG "%s\n", __func__);

 	/* Check if the adapter supports the needed features */
 	if (!i2c_check_functionality
 	    (adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
 		return 0;

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

 	memset(client, 0, sizeof(struct i2c_client));

 	client->addr = address;
 	client->adapter = adapter;
 	client->driver = &vpx3220_i2c_driver;
 	client->flags = I2C_CLIENT_ALLOW_USE;

 	/* Check for manufacture ID and part number */
 	if (kind < 0) {
 		u8 id;
 		u16 pn;

 		id = vpx3220_read(client, 0x00);
 		if (id != 0xec) {
 			dprintk(1,
 				KERN_INFO
 				"vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
 				id);
 			kfree(client);
 			return 0;
 		}

 		pn = (vpx3220_read(client, 0x02) << 8) +
 		    vpx3220_read(client, 0x01);
 		switch (pn) {
 		case 0x4680:
 			strlcpy(I2C_NAME(client), "vpx3220a",
 				sizeof(I2C_NAME(client)));
 			break;
 		case 0x4260:
 			strlcpy(I2C_NAME(client), "vpx3216b",
 				sizeof(I2C_NAME(client)));
 			break;
 		case 0x4280:
 			strlcpy(I2C_NAME(client), "vpx3214c",
 				sizeof(I2C_NAME(client)));
 			break;
 		default:
 			dprintk(1,
 				KERN_INFO
 				"%s: Wrong part number (0x%04x)\n",
 				__func__, pn);
 			kfree(client);
 			return 0;
 		}
 	} else {
 		strlcpy(I2C_NAME(client), "forced vpx32xx",
 			sizeof(I2C_NAME(client)));
 	}

 	decoder = kmalloc(sizeof(struct vpx3220), GFP_KERNEL);
 	if (decoder == NULL) {
 		kfree(client);
 		return -ENOMEM;
 	}
 	memset(decoder, 0, sizeof(struct vpx3220));
 	decoder->norm = VIDEO_MODE_PAL;
 	decoder->input = 0;
 	decoder->enable = 1;
 	decoder->bright = 32768;
 	decoder->contrast = 32768;
 	decoder->hue = 32768;
 	decoder->sat = 32768;
 	i2c_set_clientdata(client, decoder);

 	err = i2c_attach_client(client);
 	if (err) {
 		kfree(client);
 		kfree(decoder);
 		return err;
 	}

 	dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
 		I2C_NAME(client), client->addr << 1);

 	vpx3220_init_client(client);

 	return 0;
 }

 static int
 vpx3220_attach_adapter (struct i2c_adapter *adapter)
 {
 	int ret;

 	ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
 	dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
 		__func__, ret);
 	return ret;
 }

 /* -----------------------------------------------------------------------
  * Driver initialization and cleanup code
  */

 static struct i2c_driver vpx3220_i2c_driver = {
 	.owner = THIS_MODULE,
 	.name = "vpx3220",

 	.id = I2C_DRIVERID_VPX3220,
 	.flags = I2C_DF_NOTIFY,

 	.attach_adapter = vpx3220_attach_adapter,
 	.detach_client = vpx3220_detach_client,
 	.command = vpx3220_command,
 };

 static int __init
 vpx3220_init (void)
 {
 	return i2c_add_driver(&vpx3220_i2c_driver);
 }

 static void __exit
 vpx3220_cleanup (void)
 {
 	i2c_del_driver(&vpx3220_i2c_driver);
 }

 module_init(vpx3220_init);
 module_exit(vpx3220_cleanup);

 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video encoder driver");
 MODULE_AUTHOR("Laurent Pinchart");
 MODULE_LICENSE("GPL");
	/*
	* vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
	*
	* Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
	*
	* 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/init.h>
	#include <linux/delay.h>
	#include <linux/types.h>
	#include <linux/slab.h>

	#include <linux/byteorder/swab.h>

	#include <asm/io.h>
	#include <asm/uaccess.h>

	#include <linux/i2c.h>
	#include <linux/i2c-dev.h>

	#define I2C_NAME(x) (x)->name

	#include <linux/videodev.h>
	#include <linux/video_decoder.h>

	#define I2C_VPX3220 0x86
	#define VPX3220_DEBUG KERN_DEBUG "vpx3220: "

	static int debug = 0;
	module_param(debug, int, 0);
	MODULE_PARM_DESC(debug, "Debug level (0-1)");

	#define dprintk(num, format, args...) \
	do { \
	if (debug >= num) \
	printk(format, ##args); \
	} while (0)

	#define VPX_TIMEOUT_COUNT 10

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

	struct vpx3220 {
	unsigned char reg[255];

	int norm;
	int input;
	int enable;
	int bright;
	int contrast;
	int hue;
	int sat;
	};

	static char *inputs[] = { "internal", "composite", "svideo" };

	/* ----------------------------------------------------------------------- */
	static inline int
	vpx3220_write (struct i2c_client *client,
	u8 reg,
	u8 value)
	{
	struct vpx3220 *decoder = i2c_get_clientdata(client);

	decoder->reg[reg] = value;
	return i2c_smbus_write_byte_data(client, reg, value);
	}

	static inline int
	vpx3220_read (struct i2c_client *client,
	u8 reg)
	{
	return i2c_smbus_read_byte_data(client, reg);
	}

	static int
	vpx3220_fp_status (struct i2c_client *client)
	{
	unsigned char status;
	unsigned int i;

	for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
	status = vpx3220_read(client, 0x29);

	if (!(status & 4))
	return 0;

	udelay(10);

	if (need_resched())
	cond_resched();
	}

	return -1;
	}

	static int
	vpx3220_fp_write (struct i2c_client *client,
	u8 fpaddr,
	u16 data)
	{
	/* Write the 16-bit address to the FPWR register */
	if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
	dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
	return -1;
	}

	if (vpx3220_fp_status(client) < 0)
	return -1;

	/* Write the 16-bit data to the FPDAT register */
	if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
	dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
	return -1;
	}

	return 0;
	}

	static u16
	vpx3220_fp_read (struct i2c_client *client,
	u16 fpaddr)
	{
	s16 data;

	/* Write the 16-bit address to the FPRD register */
	if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
	dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
	return -1;
	}

	if (vpx3220_fp_status(client) < 0)
	return -1;

	/* Read the 16-bit data from the FPDAT register */
	data = i2c_smbus_read_word_data(client, 0x28);
	if (data == -1) {
	dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
	return -1;
	}

	return swab16(data);
	}

	static int
	vpx3220_write_block (struct i2c_client *client,
	const u8 *data,
	unsigned int len)
	{
	u8 reg;
	int ret = -1;

	while (len >= 2) {
	reg = *data++;
	if ((ret =
	vpx3220_write(client, reg, *data++)) < 0)
	break;
	len -= 2;
	}

	return ret;
	}

	static int
	vpx3220_write_fp_block (struct i2c_client *client,
	const u16 *data,
	unsigned int len)
	{
	u8 reg;
	int ret = 0;

	while (len > 1) {
	reg = *data++;
	ret \|= vpx3220_fp_write(client, reg, *data++);
	len -= 2;
	}

	return ret;
	}

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

	static const unsigned short init_ntsc[] = {
	0x1c, 0x00, /* NTSC tint angle */
	0x88, 17, /* Window 1 vertical */
	0x89, 240, /* Vertical lines in */
	0x8a, 240, /* Vertical lines out */
	0x8b, 000, /* Horizontal begin */
	0x8c, 640, /* Horizontal length */
	0x8d, 640, /* Number of pixels */
	0x8f, 0xc00, /* Disable window 2 */
	0xf0, 0x173, /* 13.5 MHz transport, Forced
	* mode, latch windows */
	0xf2, 0x13, /* NTSC M, composite input */
	0xe7, 0x1e1, /* Enable vertical standard
	* locking @ 240 lines */
	};

	static const unsigned short init_pal[] = {
	0x88, 23, /* Window 1 vertical begin */
	0x89, 288 + 16, /* Vertical lines in (16 lines
	* skipped by the VFE) */
	0x8a, 288 + 16, /* Vertical lines out (16 lines
	* skipped by the VFE) */
	0x8b, 16, /* Horizontal begin */
	0x8c, 768, /* Horizontal length */
	0x8d, 784, /* Number of pixels
	* Must be >= Horizontal begin + Horizontal length */
	0x8f, 0xc00, /* Disable window 2 */
	0xf0, 0x177, /* 13.5 MHz transport, Forced
	* mode, latch windows */
	0xf2, 0x3d1, /* PAL B,G,H,I, composite input */
	0xe7, 0x261, /* PAL/SECAM set to 288 + 16 lines
	* change to 0x241 for 288 lines */
	};

	static const unsigned short init_secam[] = {
	0x88, 23 - 16, /* Window 1 vertical begin */
	0x89, 288 + 16, /* Vertical lines in (16 lines
	* skipped by the VFE) */
	0x8a, 288 + 16, /* Vertical lines out (16 lines
	* skipped by the VFE) */
	0x8b, 16, /* Horizontal begin */
	0x8c, 768, /* Horizontal length */
	0x8d, 784, /* Number of pixels
	* Must be >= Horizontal begin + Horizontal length */
	0x8f, 0xc00, /* Disable window 2 */
	0xf0, 0x177, /* 13.5 MHz transport, Forced
	* mode, latch windows */
	0xf2, 0x3d5, /* SECAM, composite input */
	0xe7, 0x261, /* PAL/SECAM set to 288 + 16 lines
	* change to 0x241 for 288 lines */
	};

	static const unsigned char init_common[] = {
	0xf2, 0x00, /* Disable all outputs */
	0x33, 0x0d, /* Luma : VIN2, Chroma : CIN
	* (clamp off) */
	0xd8, 0xa8, /* HREF/VREF active high, VREF
	* pulse = 2, Odd/Even flag */
	0x20, 0x03, /* IF compensation 0dB/oct */
	0xe0, 0xff, /* Open up all comparators */
	0xe1, 0x00,
	0xe2, 0x7f,
	0xe3, 0x80,
	0xe4, 0x7f,
	0xe5, 0x80,
	0xe6, 0x00, /* Brightness set to 0 */
	0xe7, 0xe0, /* Contrast to 1.0, noise shaping
	* 10 to 8 2-bit error diffusion */
	0xe8, 0xf8, /* YUV422, CbCr binary offset,
	* ... (p.32) */
	0xea, 0x18, /* LLC2 connected, output FIFO
	* reset with VACTintern */
	0xf0, 0x8a, /* Half full level to 10, bus
	* shuffler [7:0, 23:16, 15:8] */
	0xf1, 0x18, /* Single clock, sync mode, no
	* FE delay, no HLEN counter */
	0xf8, 0x12, /* Port A, PIXCLK, HF# & FE#
	* strength to 2 */
	0xf9, 0x24, /* Port B, HREF, VREF, PREF &
	* ALPHA strength to 4 */
	};

	static const unsigned short init_fp[] = {
	0x59, 0,
	0xa0, 2070, /* ACC reference */
	0xa3, 0,
	0xa4, 0,
	0xa8, 30,
	0xb2, 768,
	0xbe, 27,
	0x58, 0,
	0x26, 0,
	0x4b, 0x298, /* PLL gain */
	};

	static void
	vpx3220_dump_i2c (struct i2c_client *client)
	{
	int len = sizeof(init_common);
	const unsigned char *data = init_common;

	while (len > 1) {
	dprintk(1,
	KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n",
	data, vpx3220_read(client, data));
	data += 2;
	len -= 2;
	}
	}

	static int
	vpx3220_command (struct i2c_client *client,
	unsigned int cmd,
	void *arg)
	{
	struct vpx3220 *decoder = i2c_get_clientdata(client);

	switch (cmd) {
	case 0:
	{
	vpx3220_write_block(client, init_common,
	sizeof(init_common));
	vpx3220_write_fp_block(client, init_fp,
	sizeof(init_fp) >> 1);
	switch (decoder->norm) {

	case VIDEO_MODE_NTSC:
	vpx3220_write_fp_block(client, init_ntsc,
	sizeof(init_ntsc) >> 1);
	break;

	case VIDEO_MODE_PAL:
	vpx3220_write_fp_block(client, init_pal,
	sizeof(init_pal) >> 1);
	break;
	case VIDEO_MODE_SECAM:
	vpx3220_write_fp_block(client, init_secam,
	sizeof(init_secam) >> 1);
	break;
	default:
	vpx3220_write_fp_block(client, init_pal,
	sizeof(init_pal) >> 1);
	break;
	}
	}
	break;

	case DECODER_DUMP:
	{
	vpx3220_dump_i2c(client);
	}
	break;

	case DECODER_GET_CAPABILITIES:
	{
	struct video_decoder_capability *cap = arg;

	dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n",
	I2C_NAME(client));

	cap->flags = VIDEO_DECODER_PAL \|
	VIDEO_DECODER_NTSC \|
	VIDEO_DECODER_SECAM \|
	VIDEO_DECODER_AUTO \|
	VIDEO_DECODER_CCIR;
	cap->inputs = 3;
	cap->outputs = 1;
	}
	break;

	case DECODER_GET_STATUS:
	{
	int res = 0, status;

	dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n",
	I2C_NAME(client));

	status = vpx3220_fp_read(client, 0x0f3);

	dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client),
	status);

	if (status < 0)
	return status;

	if ((status & 0x20) == 0) {
	res \|= DECODER_STATUS_GOOD \| DECODER_STATUS_COLOR;

	switch (status & 0x18) {

	case 0x00:
	case 0x10:
	case 0x14:
	case 0x18:
	res \|= DECODER_STATUS_PAL;
	break;

	case 0x08:
	res \|= DECODER_STATUS_SECAM;
	break;

	case 0x04:
	case 0x0c:
	case 0x1c:
	res \|= DECODER_STATUS_NTSC;
	break;
	}
	}

	(int ) arg = res;
	}
	break;

	case DECODER_SET_NORM:
	{
	int *iarg = arg, data;

	dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
	I2C_NAME(client), *iarg);
	switch (*iarg) {

	case VIDEO_MODE_NTSC:
	vpx3220_write_fp_block(client, init_ntsc,
	sizeof(init_ntsc) >> 1);
	dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
	I2C_NAME(client));
	break;

	case VIDEO_MODE_PAL:
	vpx3220_write_fp_block(client, init_pal,
	sizeof(init_pal) >> 1);
	dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
	I2C_NAME(client));
	break;

	case VIDEO_MODE_SECAM:
	vpx3220_write_fp_block(client, init_secam,
	sizeof(init_secam) >> 1);
	dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
	I2C_NAME(client));
	break;

	case VIDEO_MODE_AUTO:
	/* FIXME This is only preliminary support */
	data = vpx3220_fp_read(client, 0xf2) & 0x20;
	vpx3220_fp_write(client, 0xf2, 0x00c0 \| data);
	dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
	I2C_NAME(client));
	break;

	default:
	return -EINVAL;

	}
	decoder->norm = *iarg;
	}
	break;

	case DECODER_SET_INPUT:
	{
	int *iarg = arg, data;

	/* RJ: *iarg = 0: ST8 (PCTV) input
	*iarg = 1: COMPOSITE input
	iarg = 2: SVHS input /

	const int input[3][2] = {
	{0x0c, 0},
	{0x0d, 0},
	{0x0e, 1}
	};

	if (iarg < 0 \|\| iarg > 2)
	return -EINVAL;

	dprintk(1, KERN_INFO "%s: input switched to %s\n",
	I2C_NAME(client), inputs[*iarg]);

	vpx3220_write(client, 0x33, input[*iarg][0]);

	data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
	if (data < 0)
	return data;
	/* 0x0010 is required to latch the setting */
	vpx3220_fp_write(client, 0xf2,
	data \| (input[*iarg][1] << 5) \| 0x0010);

	udelay(10);
	}
	break;

	case DECODER_SET_OUTPUT:
	{
	int *iarg = arg;

	/* not much choice of outputs */
	if (*iarg != 0) {
	return -EINVAL;
	}
	}
	break;

	case DECODER_ENABLE_OUTPUT:
	{
	int *iarg = arg;

	dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
	I2C_NAME(client), *iarg);

	vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
	}
	break;

	case DECODER_SET_PICTURE:
	{
	struct video_picture *pic = arg;

	if (decoder->bright != pic->brightness) {
	/* We want -128 to 128 we get 0-65535 */
	decoder->bright = pic->brightness;
	vpx3220_write(client, 0xe6,
	(decoder->bright - 32768) >> 8);
	}
	if (decoder->contrast != pic->contrast) {
	/* We want 0 to 64 we get 0-65535 */
	/* Bit 7 and 8 is for noise shaping */
	decoder->contrast = pic->contrast;
	vpx3220_write(client, 0xe7,
	(decoder->contrast >> 10) + 192);
	}
	if (decoder->sat != pic->colour) {
	/* We want 0 to 4096 we get 0-65535 */
	decoder->sat = pic->colour;
	vpx3220_fp_write(client, 0xa0,
	decoder->sat >> 4);
	}
	if (decoder->hue != pic->hue) {
	/* We want -512 to 512 we get 0-65535 */
	decoder->hue = pic->hue;
	vpx3220_fp_write(client, 0x1c,
	((decoder->hue - 32768) >> 6) & 0xFFF);
	}
	}
	break;

	default:
	return -EINVAL;
	}

	return 0;
	}

	static int
	vpx3220_init_client (struct i2c_client *client)
	{
	vpx3220_write_block(client, init_common, sizeof(init_common));
	vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
	/* Default to PAL */
	vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);

	return 0;
	}

	/* -----------------------------------------------------------------------
	* Client managment code
	*/

	/*
	* Generic i2c probe
	* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
	*/
	static unsigned short normal_i2c[] =
	{ I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
	I2C_CLIENT_END
	};
	static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };

	static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
	static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
	static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
	static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
	static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };

	static struct i2c_client_address_data addr_data = {
	.normal_i2c = normal_i2c,
	.normal_i2c_range = normal_i2c_range,
	.probe = probe,
	.probe_range = probe_range,
	.ignore = ignore,
	.ignore_range = ignore_range,
	.force = force
	};

	static struct i2c_driver vpx3220_i2c_driver;

	static int
	vpx3220_detach_client (struct i2c_client *client)
	{
	struct vpx3220 *decoder = i2c_get_clientdata(client);
	int err;

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

	kfree(decoder);
	kfree(client);

	return 0;
	}

	static int
	vpx3220_detect_client (struct i2c_adapter *adapter,
	int address,
	int kind)
	{
	int err;
	struct i2c_client *client;
	struct vpx3220 *decoder;

	dprintk(1, VPX3220_DEBUG "%s\n", __func__);

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality
	(adapter, I2C_FUNC_SMBUS_BYTE_DATA \| I2C_FUNC_SMBUS_WORD_DATA))
	return 0;

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

	memset(client, 0, sizeof(struct i2c_client));

	client->addr = address;
	client->adapter = adapter;
	client->driver = &vpx3220_i2c_driver;
	client->flags = I2C_CLIENT_ALLOW_USE;

	/* Check for manufacture ID and part number */
	if (kind < 0) {
	u8 id;
	u16 pn;

	id = vpx3220_read(client, 0x00);
	if (id != 0xec) {
	dprintk(1,
	KERN_INFO
	"vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
	id);
	kfree(client);
	return 0;
	}

	pn = (vpx3220_read(client, 0x02) << 8) +
	vpx3220_read(client, 0x01);
	switch (pn) {
	case 0x4680:
	strlcpy(I2C_NAME(client), "vpx3220a",
	sizeof(I2C_NAME(client)));
	break;
	case 0x4260:
	strlcpy(I2C_NAME(client), "vpx3216b",
	sizeof(I2C_NAME(client)));
	break;
	case 0x4280:
	strlcpy(I2C_NAME(client), "vpx3214c",
	sizeof(I2C_NAME(client)));
	break;
	default:
	dprintk(1,
	KERN_INFO
	"%s: Wrong part number (0x%04x)\n",
	__func__, pn);
	kfree(client);
	return 0;
	}
	} else {
	strlcpy(I2C_NAME(client), "forced vpx32xx",
	sizeof(I2C_NAME(client)));
	}

	decoder = kmalloc(sizeof(struct vpx3220), GFP_KERNEL);
	if (decoder == NULL) {
	kfree(client);
	return -ENOMEM;
	}
	memset(decoder, 0, sizeof(struct vpx3220));
	decoder->norm = VIDEO_MODE_PAL;
	decoder->input = 0;
	decoder->enable = 1;
	decoder->bright = 32768;
	decoder->contrast = 32768;
	decoder->hue = 32768;
	decoder->sat = 32768;
	i2c_set_clientdata(client, decoder);

	err = i2c_attach_client(client);
	if (err) {
	kfree(client);
	kfree(decoder);
	return err;
	}

	dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
	I2C_NAME(client), client->addr << 1);

	vpx3220_init_client(client);

	return 0;
	}

	static int
	vpx3220_attach_adapter (struct i2c_adapter *adapter)
	{
	int ret;

	ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
	dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
	__func__, ret);
	return ret;
	}

	/* -----------------------------------------------------------------------
	* Driver initialization and cleanup code
	*/

	static struct i2c_driver vpx3220_i2c_driver = {
	.owner = THIS_MODULE,
	.name = "vpx3220",

	.id = I2C_DRIVERID_VPX3220,
	.flags = I2C_DF_NOTIFY,

	.attach_adapter = vpx3220_attach_adapter,
	.detach_client = vpx3220_detach_client,
	.command = vpx3220_command,
	};

	static int __init
	vpx3220_init (void)
	{
	return i2c_add_driver(&vpx3220_i2c_driver);
	}

	static void __exit
	vpx3220_cleanup (void)
	{
	i2c_del_driver(&vpx3220_i2c_driver);
	}

	module_init(vpx3220_init);
	module_exit(vpx3220_cleanup);

	MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video encoder driver");
	MODULE_AUTHOR("Laurent Pinchart");
	MODULE_LICENSE("GPL");