[mirror_ubuntu-artful-kernel.git] / drivers / media / video / vpx3220.c

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

#include <linux/i2c.h>

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

#include <linux/videodev.h>
#include <media/v4l2-common.h>
#include <linux/video_decoder.h>

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

static int debug;
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, 0x73,		/* 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,		/* Vertical lines in (16 lines
				 * skipped by the VFE) */
	0x8a, 288,		/* 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, 0x77,		/* 13.5 MHz transport, Forced
				 * mode, latch windows */
	0xf2, 0x3d1,		/* PAL B,G,H,I, composite input */
	0xe7, 0x241,		/* PAL/SECAM set to 288 lines */
};

static const unsigned short init_secam[] = {
	0x88, 23,		/* Window 1 vertical begin */
	0x89, 288,		/* Vertical lines in (16 lines
				 * skipped by the VFE) */
	0x8a, 288,		/* 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, 0x77,		/* 13.5 MHz transport, Forced
				 * mode, latch windows */
	0xf2, 0x3d5,		/* SECAM, composite input */
	0xe7, 0x241,		/* PAL/SECAM set to 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;
		int temp_input;

		/* Here we back up the input selection because it gets
		   overwritten when we fill the registers with the
		   choosen video norm */
		temp_input = vpx3220_fp_read(client, 0xf2);

		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;

		/* And here we set the backed up video input again */
		vpx3220_fp_write(client, 0xf2, temp_input | 0x0010);
		udelay(10);
	}
		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 management 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 ignore = I2C_CLIENT_END;

static struct i2c_client_address_data addr_data = {
	.normal_i2c		= normal_i2c,
	.probe			= &ignore,
	.ignore			= &ignore,
};

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

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

	/* 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 = kzalloc(sizeof(struct vpx3220), GFP_KERNEL);
	if (decoder == NULL) {
		kfree(client);
		return -ENOMEM;
	}
	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 = {
	.driver = {
		.name = "vpx3220",
	},

	.id = I2C_DRIVERID_VPX3220,

	.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 decoder driver");
MODULE_AUTHOR("Laurent Pinchart");
MODULE_LICENSE("GPL");
Commit	Line	Data
d56410e0	1	/*
1da177e4 LT	2	* vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
	3	*
	4	* Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	19	*/
	20
	21	#include <linux/module.h>
	22	#include <linux/init.h>
	23	#include <linux/delay.h>
	24	#include <linux/types.h>
	25	#include <linux/slab.h>
	26
1da177e4 LT	27	#include <asm/io.h>
	28	#include <asm/uaccess.h>
	29
	30	#include <linux/i2c.h>
1da177e4 LT	31
	32	#define I2C_NAME(x) (x)->name
	33
	34	#include <linux/videodev.h>
5e87efa3	35	#include <media/v4l2-common.h>
1da177e4 LT	36	#include <linux/video_decoder.h>
	37
	38	#define I2C_VPX3220 0x86
	39	#define VPX3220_DEBUG KERN_DEBUG "vpx3220: "
	40
ff699e6b	41	static int debug;
1da177e4 LT	42	module_param(debug, int, 0);
	43	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	44
	45	#define dprintk(num, format, args...) \
	46	do { \
	47	if (debug >= num) \
	48	printk(format, ##args); \
	49	} while (0)
	50
	51	#define VPX_TIMEOUT_COUNT 10
	52
	53	/* ----------------------------------------------------------------------- */
	54
	55	struct vpx3220 {
	56	unsigned char reg[255];
	57
	58	int norm;
	59	int input;
	60	int enable;
	61	int bright;
	62	int contrast;
	63	int hue;
	64	int sat;
	65	};
	66
	67	static char *inputs[] = { "internal", "composite", "svideo" };
	68
	69	/* ----------------------------------------------------------------------- */
	70	static inline int
	71	vpx3220_write (struct i2c_client *client,
	72	u8 reg,
	73	u8 value)
	74	{
	75	struct vpx3220 *decoder = i2c_get_clientdata(client);
	76
	77	decoder->reg[reg] = value;
	78	return i2c_smbus_write_byte_data(client, reg, value);
	79	}
	80
	81	static inline int
	82	vpx3220_read (struct i2c_client *client,
	83	u8 reg)
	84	{
	85	return i2c_smbus_read_byte_data(client, reg);
	86	}
	87
	88	static int
	89	vpx3220_fp_status (struct i2c_client *client)
	90	{
	91	unsigned char status;
	92	unsigned int i;
	93
	94	for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
	95	status = vpx3220_read(client, 0x29);
	96
	97	if (!(status & 4))
	98	return 0;
	99
	100	udelay(10);
	101
	102	if (need_resched())
	103	cond_resched();
	104	}
	105
106	return -1;
107	}
108
109	static int
110	vpx3220_fp_write (struct i2c_client *client,
111	u8 fpaddr,
112	u16 data)
113	{
114	/* Write the 16-bit address to the FPWR register */
115	if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
116	dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
117	return -1;
118	}
119
120	if (vpx3220_fp_status(client) < 0)
121	return -1;
122
123	/* Write the 16-bit data to the FPDAT register */
124	if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
125	dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
126	return -1;
127	}
128
129	return 0;
130	}
131
132	static u16
133	vpx3220_fp_read (struct i2c_client *client,
134	u16 fpaddr)
135	{
136	s16 data;
137
138	/* Write the 16-bit address to the FPRD register */
139	if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
140	dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
141	return -1;
142	}
143
144	if (vpx3220_fp_status(client) < 0)
145	return -1;
146
147	/* Read the 16-bit data from the FPDAT register */
148	data = i2c_smbus_read_word_data(client, 0x28);
149	if (data == -1) {
150	dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
151	return -1;
152	}
153
154	return swab16(data);
155	}
156
157	static int
158	vpx3220_write_block (struct i2c_client *client,
159	const u8 *data,
160	unsigned int len)
161	{
162	u8 reg;
163	int ret = -1;
164
165	while (len >= 2) {
166	reg = *data++;
167	if ((ret =
168	vpx3220_write(client, reg, *data++)) < 0)
169	break;
170	len -= 2;
171	}
172
173	return ret;
174	}
175
176	static int
177	vpx3220_write_fp_block (struct i2c_client *client,
d56410e0 MCC	178	const u16 *data,
d56410e0 MCC	179	unsigned int len)
1da177e4 LT	180	{
	181	u8 reg;
	182	int ret = 0;
	183
	184	while (len > 1) {
	185	reg = *data++;
	186	ret \|= vpx3220_fp_write(client, reg, *data++);
	187	len -= 2;
	188	}
	189
	190	return ret;
	191	}
	192
	193	/* ---------------------------------------------------------------------- */
	194
	195	static const unsigned short init_ntsc[] = {
	196	0x1c, 0x00, /* NTSC tint angle */
	197	0x88, 17, /* Window 1 vertical */
	198	0x89, 240, /* Vertical lines in */
	199	0x8a, 240, /* Vertical lines out */
	200	0x8b, 000, /* Horizontal begin */
	201	0x8c, 640, /* Horizontal length */
	202	0x8d, 640, /* Number of pixels */
	203	0x8f, 0xc00, /* Disable window 2 */
9b3acc21	204	0xf0, 0x73, /* 13.5 MHz transport, Forced
1da177e4 LT	205	* mode, latch windows */
	206	0xf2, 0x13, /* NTSC M, composite input */
	207	0xe7, 0x1e1, /* Enable vertical standard
	208	* locking @ 240 lines */
	209	};
	210
	211	static const unsigned short init_pal[] = {
	212	0x88, 23, /* Window 1 vertical begin */
9b3acc21	213	0x89, 288, /* Vertical lines in (16 lines
1da177e4	214	* skipped by the VFE) */
9b3acc21	215	0x8a, 288, /* Vertical lines out (16 lines
1da177e4 LT	216	* skipped by the VFE) */
	217	0x8b, 16, /* Horizontal begin */
	218	0x8c, 768, /* Horizontal length */
	219	0x8d, 784, /* Number of pixels
	220	* Must be >= Horizontal begin + Horizontal length */
	221	0x8f, 0xc00, /* Disable window 2 */
9b3acc21	222	0xf0, 0x77, /* 13.5 MHz transport, Forced
1da177e4 LT	223	* mode, latch windows */
1da177e4 LT	224	0xf2, 0x3d1, /* PAL B,G,H,I, composite input */
9b3acc21	225	0xe7, 0x241, /* PAL/SECAM set to 288 lines */
1da177e4 LT	226	};
	227
	228	static const unsigned short init_secam[] = {
9b3acc21 RB	229	0x88, 23, /* Window 1 vertical begin */
9b3acc21 RB	230	0x89, 288, /* Vertical lines in (16 lines
1da177e4	231	* skipped by the VFE) */
9b3acc21	232	0x8a, 288, /* Vertical lines out (16 lines
1da177e4 LT	233	* skipped by the VFE) */
	234	0x8b, 16, /* Horizontal begin */
	235	0x8c, 768, /* Horizontal length */
	236	0x8d, 784, /* Number of pixels
	237	* Must be >= Horizontal begin + Horizontal length */
	238	0x8f, 0xc00, /* Disable window 2 */
9b3acc21	239	0xf0, 0x77, /* 13.5 MHz transport, Forced
1da177e4 LT	240	* mode, latch windows */
1da177e4 LT	241	0xf2, 0x3d5, /* SECAM, composite input */
9b3acc21	242	0xe7, 0x241, /* PAL/SECAM set to 288 lines */
1da177e4 LT	243	};
	244
	245	static const unsigned char init_common[] = {
	246	0xf2, 0x00, /* Disable all outputs */
	247	0x33, 0x0d, /* Luma : VIN2, Chroma : CIN
	248	* (clamp off) */
	249	0xd8, 0xa8, /* HREF/VREF active high, VREF
	250	* pulse = 2, Odd/Even flag */
	251	0x20, 0x03, /* IF compensation 0dB/oct */
	252	0xe0, 0xff, /* Open up all comparators */
	253	0xe1, 0x00,
	254	0xe2, 0x7f,
	255	0xe3, 0x80,
	256	0xe4, 0x7f,
	257	0xe5, 0x80,
	258	0xe6, 0x00, /* Brightness set to 0 */
	259	0xe7, 0xe0, /* Contrast to 1.0, noise shaping
	260	* 10 to 8 2-bit error diffusion */
	261	0xe8, 0xf8, /* YUV422, CbCr binary offset,
	262	* ... (p.32) */
	263	0xea, 0x18, /* LLC2 connected, output FIFO
	264	* reset with VACTintern */
	265	0xf0, 0x8a, /* Half full level to 10, bus
	266	* shuffler [7:0, 23:16, 15:8] */
	267	0xf1, 0x18, /* Single clock, sync mode, no
	268	* FE delay, no HLEN counter */
	269	0xf8, 0x12, /* Port A, PIXCLK, HF# & FE#
	270	* strength to 2 */
	271	0xf9, 0x24, /* Port B, HREF, VREF, PREF &
	272	* ALPHA strength to 4 */
	273	};
	274
	275	static const unsigned short init_fp[] = {
	276	0x59, 0,
	277	0xa0, 2070, /* ACC reference */
	278	0xa3, 0,
	279	0xa4, 0,
	280	0xa8, 30,
	281	0xb2, 768,
	282	0xbe, 27,
	283	0x58, 0,
	284	0x26, 0,
	285	0x4b, 0x298, /* PLL gain */
	286	};
	287
	288	static void
	289	vpx3220_dump_i2c (struct i2c_client *client)
	290	{
	291	int len = sizeof(init_common);
	292	const unsigned char *data = init_common;
	293
	294	while (len > 1) {
	295	dprintk(1,
	296	KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n",
	297	data, vpx3220_read(client, data));
	298	data += 2;
	299	len -= 2;
	300	}
	301	}
	302
	303	static int
	304	vpx3220_command (struct i2c_client *client,
	305	unsigned int cmd,
	306	void *arg)
307	{
308	struct vpx3220 *decoder = i2c_get_clientdata(client);
309
310	switch (cmd) {
311	case 0:
312	{
313	vpx3220_write_block(client, init_common,
314	sizeof(init_common));
315	vpx3220_write_fp_block(client, init_fp,
316	sizeof(init_fp) >> 1);
317	switch (decoder->norm) {
d56410e0	318
1da177e4 LT	319	case VIDEO_MODE_NTSC:
	320	vpx3220_write_fp_block(client, init_ntsc,
	321	sizeof(init_ntsc) >> 1);
	322	break;
	323
	324	case VIDEO_MODE_PAL:
	325	vpx3220_write_fp_block(client, init_pal,
d56410e0	326	sizeof(init_pal) >> 1);
1da177e4 LT	327	break;
	328	case VIDEO_MODE_SECAM:
	329	vpx3220_write_fp_block(client, init_secam,
	330	sizeof(init_secam) >> 1);
	331	break;
	332	default:
	333	vpx3220_write_fp_block(client, init_pal,
d56410e0	334	sizeof(init_pal) >> 1);
1da177e4 LT	335	break;
1da177e4 LT	336	}
d56410e0	337	}
1da177e4 LT	338	break;
	339
	340	case DECODER_DUMP:
	341	{
	342	vpx3220_dump_i2c(client);
	343	}
	344	break;
	345
	346	case DECODER_GET_CAPABILITIES:
	347	{
	348	struct video_decoder_capability *cap = arg;
	349
	350	dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n",
	351	I2C_NAME(client));
	352
	353	cap->flags = VIDEO_DECODER_PAL \|
	354	VIDEO_DECODER_NTSC \|
	355	VIDEO_DECODER_SECAM \|
	356	VIDEO_DECODER_AUTO \|
	357	VIDEO_DECODER_CCIR;
	358	cap->inputs = 3;
	359	cap->outputs = 1;
	360	}
	361	break;
	362
	363	case DECODER_GET_STATUS:
	364	{
	365	int res = 0, status;
	366
	367	dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n",
	368	I2C_NAME(client));
	369
	370	status = vpx3220_fp_read(client, 0x0f3);
	371
	372	dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client),
	373	status);
	374
	375	if (status < 0)
	376	return status;
	377
	378	if ((status & 0x20) == 0) {
	379	res \|= DECODER_STATUS_GOOD \| DECODER_STATUS_COLOR;
	380
	381	switch (status & 0x18) {
	382
	383	case 0x00:
	384	case 0x10:
	385	case 0x14:
	386	case 0x18:
	387	res \|= DECODER_STATUS_PAL;
	388	break;
	389
	390	case 0x08:
	391	res \|= DECODER_STATUS_SECAM;
	392	break;
	393
	394	case 0x04:
	395	case 0x0c:
	396	case 0x1c:
	397	res \|= DECODER_STATUS_NTSC;
	398	break;
	399	}
	400	}
	401
402	(int ) arg = res;
403	}
404	break;
405
406	case DECODER_SET_NORM:
407	{
408	int *iarg = arg, data;
de21eb63 RB	409	int temp_input;
	410
	411	/* Here we back up the input selection because it gets
	412	overwritten when we fill the registers with the
d56410e0	413	choosen video norm */
de21eb63	414	temp_input = vpx3220_fp_read(client, 0xf2);
1da177e4 LT	415
	416	dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
	417	I2C_NAME(client), *iarg);
	418	switch (*iarg) {
	419
	420	case VIDEO_MODE_NTSC:
	421	vpx3220_write_fp_block(client, init_ntsc,
	422	sizeof(init_ntsc) >> 1);
	423	dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
	424	I2C_NAME(client));
	425	break;
	426
	427	case VIDEO_MODE_PAL:
	428	vpx3220_write_fp_block(client, init_pal,
	429	sizeof(init_pal) >> 1);
	430	dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
	431	I2C_NAME(client));
	432	break;
	433
	434	case VIDEO_MODE_SECAM:
	435	vpx3220_write_fp_block(client, init_secam,
	436	sizeof(init_secam) >> 1);
	437	dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
	438	I2C_NAME(client));
	439	break;
	440
	441	case VIDEO_MODE_AUTO:
	442	/* FIXME This is only preliminary support */
	443	data = vpx3220_fp_read(client, 0xf2) & 0x20;
	444	vpx3220_fp_write(client, 0xf2, 0x00c0 \| data);
	445	dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
	446	I2C_NAME(client));
	447	break;
	448
	449	default:
	450	return -EINVAL;
	451
	452	}
	453	decoder->norm = *iarg;
de21eb63 RB	454
	455	/* And here we set the backed up video input again */
	456	vpx3220_fp_write(client, 0xf2, temp_input \| 0x0010);
	457	udelay(10);
1da177e4 LT	458	}
	459	break;
	460
	461	case DECODER_SET_INPUT:
	462	{
	463	int *iarg = arg, data;
	464
	465	/* RJ: *iarg = 0: ST8 (PCTV) input
	466	*iarg = 1: COMPOSITE input
	467	iarg = 2: SVHS input /
	468
	469	const int input[3][2] = {
	470	{0x0c, 0},
	471	{0x0d, 0},
	472	{0x0e, 1}
	473	};
	474
	475	if (iarg < 0 \|\| iarg > 2)
	476	return -EINVAL;
	477
	478	dprintk(1, KERN_INFO "%s: input switched to %s\n",
	479	I2C_NAME(client), inputs[*iarg]);
	480
	481	vpx3220_write(client, 0x33, input[*iarg][0]);
	482
	483	data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
	484	if (data < 0)
	485	return data;
	486	/* 0x0010 is required to latch the setting */
	487	vpx3220_fp_write(client, 0xf2,
	488	data \| (input[*iarg][1] << 5) \| 0x0010);
	489
	490	udelay(10);
	491	}
	492	break;
	493
	494	case DECODER_SET_OUTPUT:
	495	{
	496	int *iarg = arg;
	497
	498	/* not much choice of outputs */
	499	if (*iarg != 0) {
	500	return -EINVAL;
	501	}
	502	}
	503	break;
	504
	505	case DECODER_ENABLE_OUTPUT:
	506	{
	507	int *iarg = arg;
	508
	509	dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
	510	I2C_NAME(client), *iarg);
	511
	512	vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
	513	}
	514	break;
	515
	516	case DECODER_SET_PICTURE:
	517	{
	518	struct video_picture *pic = arg;
	519
	520	if (decoder->bright != pic->brightness) {
	521	/* We want -128 to 128 we get 0-65535 */
522	decoder->bright = pic->brightness;
523	vpx3220_write(client, 0xe6,
524	(decoder->bright - 32768) >> 8);
525	}
526	if (decoder->contrast != pic->contrast) {
527	/* We want 0 to 64 we get 0-65535 */
528	/* Bit 7 and 8 is for noise shaping */
529	decoder->contrast = pic->contrast;
530	vpx3220_write(client, 0xe7,
531	(decoder->contrast >> 10) + 192);
532	}
533	if (decoder->sat != pic->colour) {
534	/* We want 0 to 4096 we get 0-65535 */
535	decoder->sat = pic->colour;
536	vpx3220_fp_write(client, 0xa0,
537	decoder->sat >> 4);
538	}
539	if (decoder->hue != pic->hue) {
540	/* We want -512 to 512 we get 0-65535 */
541	decoder->hue = pic->hue;
542	vpx3220_fp_write(client, 0x1c,
543	((decoder->hue - 32768) >> 6) & 0xFFF);
544	}
545	}
546	break;
547
548	default:
549	return -EINVAL;
550	}
551
552	return 0;
553	}
554
555	static int
556	vpx3220_init_client (struct i2c_client *client)
557	{
558	vpx3220_write_block(client, init_common, sizeof(init_common));
559	vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
560	/* Default to PAL */
561	vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);
562
563	return 0;
564	}
565
566	/* -----------------------------------------------------------------------
c84e6036	567	* Client management code
1da177e4 LT	568	*/
	569
	570	/*
	571	* Generic i2c probe
	572	* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
	573	*/
	574	static unsigned short normal_i2c[] =
	575	{ I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
	576	I2C_CLIENT_END
	577	};
1da177e4	578
68cc9d0b	579	static unsigned short ignore = I2C_CLIENT_END;
d56410e0	580
1da177e4 LT	581	static struct i2c_client_address_data addr_data = {
1da177e4 LT	582	.normal_i2c = normal_i2c,
68cc9d0b JD	583	.probe = &ignore,
68cc9d0b JD	584	.ignore = &ignore,
1da177e4 LT	585	};
	586
	587	static struct i2c_driver vpx3220_i2c_driver;
	588
	589	static int
	590	vpx3220_detach_client (struct i2c_client *client)
	591	{
	592	struct vpx3220 *decoder = i2c_get_clientdata(client);
	593	int err;
	594
	595	err = i2c_detach_client(client);
	596	if (err) {
	597	return err;
	598	}
	599
	600	kfree(decoder);
	601	kfree(client);
	602
	603	return 0;
	604	}
	605
	606	static int
	607	vpx3220_detect_client (struct i2c_adapter *adapter,
	608	int address,
	609	int kind)
	610	{
	611	int err;
	612	struct i2c_client *client;
	613	struct vpx3220 *decoder;
	614
	615	dprintk(1, VPX3220_DEBUG "%s\n", __func__);
	616
	617	/* Check if the adapter supports the needed features */
	618	if (!i2c_check_functionality
	619	(adapter, I2C_FUNC_SMBUS_BYTE_DATA \| I2C_FUNC_SMBUS_WORD_DATA))
	620	return 0;
	621
7408187d	622	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
1da177e4 LT	623	if (client == NULL) {
	624	return -ENOMEM;
	625	}
	626
1da177e4 LT	627	client->addr = address;
	628	client->adapter = adapter;
	629	client->driver = &vpx3220_i2c_driver;
1da177e4 LT	630
	631	/* Check for manufacture ID and part number */
	632	if (kind < 0) {
	633	u8 id;
	634	u16 pn;
	635
	636	id = vpx3220_read(client, 0x00);
	637	if (id != 0xec) {
	638	dprintk(1,
	639	KERN_INFO
	640	"vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
	641	id);
	642	kfree(client);
	643	return 0;
	644	}
	645
	646	pn = (vpx3220_read(client, 0x02) << 8) +
	647	vpx3220_read(client, 0x01);
	648	switch (pn) {
	649	case 0x4680:
	650	strlcpy(I2C_NAME(client), "vpx3220a",
	651	sizeof(I2C_NAME(client)));
	652	break;
	653	case 0x4260:
	654	strlcpy(I2C_NAME(client), "vpx3216b",
	655	sizeof(I2C_NAME(client)));
	656	break;
	657	case 0x4280:
	658	strlcpy(I2C_NAME(client), "vpx3214c",
	659	sizeof(I2C_NAME(client)));
	660	break;
	661	default:
	662	dprintk(1,
d56410e0	663	KERN_INFO
1da177e4 LT	664	"%s: Wrong part number (0x%04x)\n",
	665	__func__, pn);
	666	kfree(client);
	667	return 0;
	668	}
	669	} else {
	670	strlcpy(I2C_NAME(client), "forced vpx32xx",
	671	sizeof(I2C_NAME(client)));
	672	}
	673
7408187d	674	decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL);
1da177e4 LT	675	if (decoder == NULL) {
	676	kfree(client);
	677	return -ENOMEM;
	678	}
1da177e4 LT	679	decoder->norm = VIDEO_MODE_PAL;
	680	decoder->input = 0;
	681	decoder->enable = 1;
	682	decoder->bright = 32768;
	683	decoder->contrast = 32768;
	684	decoder->hue = 32768;
	685	decoder->sat = 32768;
	686	i2c_set_clientdata(client, decoder);
	687
	688	err = i2c_attach_client(client);
	689	if (err) {
	690	kfree(client);
	691	kfree(decoder);
	692	return err;
	693	}
	694
	695	dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
	696	I2C_NAME(client), client->addr << 1);
	697
	698	vpx3220_init_client(client);
	699
	700	return 0;
	701	}
	702
	703	static int
	704	vpx3220_attach_adapter (struct i2c_adapter *adapter)
	705	{
	706	int ret;
	707
	708	ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
	709	dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
	710	__func__, ret);
	711	return ret;
	712	}
	713
	714	/* -----------------------------------------------------------------------
	715	* Driver initialization and cleanup code
	716	*/
	717
	718	static struct i2c_driver vpx3220_i2c_driver = {
604f28e2	719	.driver = {
604f28e2 LR	720	.name = "vpx3220",
604f28e2 LR	721	},
1da177e4 LT	722
1da177e4 LT	723	.id = I2C_DRIVERID_VPX3220,
1da177e4 LT	724
	725	.attach_adapter = vpx3220_attach_adapter,
	726	.detach_client = vpx3220_detach_client,
	727	.command = vpx3220_command,
	728	};
	729
	730	static int __init
	731	vpx3220_init (void)
	732	{
	733	return i2c_add_driver(&vpx3220_i2c_driver);
	734	}
	735
	736	static void __exit
	737	vpx3220_cleanup (void)
	738	{
	739	i2c_del_driver(&vpx3220_i2c_driver);
	740	}
	741
	742	module_init(vpx3220_init);
	743	module_exit(vpx3220_cleanup);
	744
6e40773a	745	MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver");
1da177e4 LT	746	MODULE_AUTHOR("Laurent Pinchart");
1da177e4 LT	747	MODULE_LICENSE("GPL");