patch-2.4.25 linux-2.4.25/drivers/media/video/saa7191.c

• Lines: 321
• Date: 2004-02-18 05:36:31.000000000 -0800
• Orig file: linux-2.4.24/drivers/media/video/saa7191.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.24/drivers/media/video/saa7191.c linux-2.4.25/drivers/media/video/saa7191.c
@@ -0,0 +1,320 @@
+/* 
+ *  saa7191 - Philips SAA7191 video decoder driver
+ *
+ *  Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+
+#include <linux/videodev.h>
+#include <linux/video_decoder.h>
+#include <linux/i2c.h>
+
+#include "saa7191.h"
+
+#define VINO_ADAPTER	(I2C_ALGO_SGI | I2C_HW_SGI_VINO)
+
+struct saa7191 {
+	struct i2c_client *client;
+	unsigned char reg[25];
+	unsigned char norm;
+	unsigned char input;
+	unsigned char bright;
+	unsigned char contrast;
+	unsigned char hue;
+	unsigned char sat;
+};
+
+static struct i2c_driver i2c_driver_saa7191;
+
+static int saa7191_attach(struct i2c_adapter *adap, int addr, int kind)
+{
+	static const unsigned char initseq[] = {
+		0,
+		0x50,	/* SAA7191_REG_IDEL */
+		0x30,	/* SAA7191_REG_HSYB */
+		0x00,	/* SAA7191_REG_HSYS */
+		0xe8,	/* SAA7191_REG_HCLB */
+		0xb6,	/* SAA7191_REG_HCLS */
+		0xf4,	/* SAA7191_REG_HPHI */
+		0x01,	/* SAA7191_REG_LUMA */
+		0x00,	/* SAA7191_REG_HUEC */
+		0xf8,	/* SAA7191_REG_CKTQ */
+		0xf8,	/* SAA7191_REG_CKTS */
+		0x90,	/* SAA7191_REG_PLSE */
+		0x90,	/* SAA7191_REG_SESE */
+		0x00,	/* SAA7191_REG_GAIN */
+		0x8c,	/* SAA7191_REG_STDC */
+		0x78,	/* SAA7191_REG_IOCK */
+		0x99,	/* SAA7191_REG_CTL3 */
+		0x00,	/* SAA7191_REG_CTL4 */
+		0x2c,	/* SAA7191_REG_CHCV */
+		0x00,	/* unused */
+		0x00,	/* unused */
+		0x34,	/* SAA7191_REG_HS6B */
+		0x0a,	/* SAA7191_REG_HS6S */
+		0xf4,	/* SAA7191_REG_HC6B */
+		0xce,	/* SAA7191_REG_HC6S */
+		0xf4,	/* SAA7191_REG_HP6I */
+	};
+	int err = 0;
+	struct saa7191 *decoder;
+	struct i2c_client *client;
+
+	client = kmalloc(sizeof(*client), GFP_KERNEL);
+	if (!client) 
+		return -ENOMEM;
+	decoder = kmalloc(sizeof(*decoder), GFP_KERNEL);
+	if (!decoder) {
+		err = -ENOMEM;
+		goto out_free_client;
+	}
+	client->data = decoder;
+	client->adapter = adap;
+	client->addr = addr;
+	client->driver = &i2c_driver_saa7191;
+	strcpy(client->name, "saa7191 client");			
+	decoder->client = client;
+
+	err = i2c_attach_client(client);
+	if (err)
+		goto out_free_decoder;
+
+	decoder->norm = VIDEO_DECODER_PAL | VIDEO_MODE_NTSC |
+			VIDEO_DECODER_AUTO;
+	decoder->input = 0;
+	/* Registers are 8bit wide and we are storing shifted values */
+	decoder->bright = 128;
+	decoder->contrast = 128;
+	decoder->hue = 128;
+	decoder->sat = 128;
+
+	memcpy(decoder->reg, initseq, sizeof(initseq));
+	err = i2c_master_send(client, initseq, sizeof(initseq));
+	if (err)
+		printk(KERN_INFO "saa7191 initialization failed (%d)\n", err);
+
+	MOD_INC_USE_COUNT;
+	return 0;
+
+out_free_decoder:
+	kfree(decoder);
+out_free_client:
+	kfree(client);
+	return err;
+}
+
+static int saa7191_probe(struct i2c_adapter *adap)
+{
+	/* Always connected to VINO */
+	if (adap->id == VINO_ADAPTER)
+		return saa7191_attach(adap, SAA7191_ADDR, 0);
+	/* Feel free to add probe here :-) */
+	return -ENODEV;
+}
+
+static int saa7191_detach(struct i2c_client *client)
+{
+	struct saa7191 *decoder = client->data;
+
+	i2c_detach_client(client);
+	kfree(decoder);
+	kfree(client);
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static unsigned char saa7191_read(struct i2c_client *client,
+				  unsigned char command)
+{
+	return ((struct saa7191 *)client->data)->reg[command];
+}
+
+static int saa7191_write(struct i2c_client *client, unsigned char command,
+			 unsigned char value)
+{
+	((struct saa7191 *)client->data)->reg[command] = value;
+	return i2c_smbus_write_byte_data(client, command, value);
+}
+
+static int vino_set_input(struct i2c_client *client, int val)
+{
+	unsigned char luma = saa7191_read(client, SAA7191_REG_LUMA);
+	unsigned char iock = saa7191_read(client, SAA7191_REG_IOCK);
+
+	switch (val) {
+	case 0: /* Set Composite input */
+		iock &= ~0x03;
+		/* Chrominance trap active */
+		luma |= ~SAA7191_LUMA_BYPS;
+		break;
+	case 1: /* Set S-Video input */
+		iock |= 2;
+		/* Chrominance trap bypassed */
+		luma |= SAA7191_LUMA_BYPS;
+		break;
+	default:
+		return -EINVAL;
+	}
+	saa7191_write(client, SAA7191_REG_LUMA, luma);
+	saa7191_write(client, SAA7191_REG_IOCK, iock);
+
+	return 0;
+}
+
+static int saa7191_command(struct i2c_client *client, unsigned int cmd,
+			   void *arg)
+{
+	struct saa7191 *decoder = client->data;
+
+	switch (cmd) {
+
+	case DECODER_GET_CAPABILITIES: {
+		struct video_decoder_capability *cap = arg;
+
+		cap->flags  = VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC |
+			      VIDEO_DECODER_AUTO;
+		cap->inputs = (client->adapter->id == VINO_ADAPTER) ? 2 : 1;
+		cap->outputs = 1;
+		break;
+	}
+	case DECODER_GET_STATUS: {
+		int *iarg = arg;
+		int status;
+		int res = 0;
+
+		status = i2c_smbus_read_byte_data(client, SAA7191_REG_STATUS);
+		if ((status & SAA7191_STATUS_HLCK) == 0)
+			res |= DECODER_STATUS_GOOD;
+		switch (decoder->norm) {
+		case VIDEO_MODE_NTSC:
+			res |= DECODER_STATUS_NTSC;
+			break;
+		case VIDEO_MODE_PAL:
+			res |= DECODER_STATUS_PAL;
+			break;
+		case VIDEO_MODE_AUTO:
+		default:
+			if (status & SAA7191_STATUS_FIDT)
+				res |= DECODER_STATUS_NTSC;
+			else
+				res |= DECODER_STATUS_PAL;
+			if (status & SAA7191_STATUS_CODE)
+				res |= DECODER_STATUS_COLOR;
+			break;
+		}
+		*iarg = res;
+		break;
+	}
+	case DECODER_SET_NORM: {
+		int *iarg = arg;
+
+		switch (*iarg) {
+		case VIDEO_MODE_NTSC:
+			break;
+		case VIDEO_MODE_PAL:
+			break;
+		default:
+			return -EINVAL;
+		}
+		decoder->norm = *iarg;
+		break;
+	}
+	case DECODER_SET_INPUT:	{
+		int *iarg = arg;
+
+		switch (client->adapter->id) {
+		case VINO_ADAPTER:
+			return vino_set_input(client, *iarg);
+		default:
+			if (*iarg != 0)
+				return -EINVAL;
+		}
+		break;
+	}
+	case DECODER_SET_OUTPUT: {
+		int *iarg = arg;
+
+		/* not much choice of outputs */
+		if (*iarg != 0)
+			return -EINVAL;
+		break;
+	}
+	case DECODER_ENABLE_OUTPUT: {
+		/* Always enabled */
+		break;
+	}
+	case DECODER_SET_PICTURE: {
+		struct video_picture *pic = arg;
+		unsigned val;
+#if 0
+		/* TODO */
+		val = pic->brightness >> 8;
+		if (decoder->bright != val) {
+			decoder->bright = val;
+			i2c_smbus_write_byte_data(client, XXX, val);
+		}
+		val = pic->contrast >> 8;
+		if (decoder->contrast != val) {
+			decoder->contrast = val;
+			i2c_smbus_write_byte_data(client, XXX, val);
+		}
+		val = pic->colour >> 8;
+		if (decoder->sat != val) {
+			decoder->sat = val;
+			i2c_smbus_write_byte_data(client, XXX, val);
+		}
+#endif
+		val = (pic->hue >> 8) - 0x80;
+		if (decoder->hue != val) {
+			decoder->hue = val;
+			i2c_smbus_write_byte_data(client, SAA7191_REG_HUEC,
+						  val);
+		}
+		break;
+	}
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct i2c_driver i2c_driver_saa7191 = {
+	.name 		= "saa7191",
+	.id 		= I2C_DRIVERID_SAA7191,
+	.flags 		= I2C_DF_NOTIFY,
+	.attach_adapter = saa7191_probe,
+	.detach_client 	= saa7191_detach,
+	.command 	= saa7191_command
+};
+
+static int saa7191_init(void)
+{
+	return i2c_add_driver(&i2c_driver_saa7191);
+}
+
+static void saa7191_exit(void)
+{
+	i2c_del_driver(&i2c_driver_saa7191);
+}
+
+module_init(saa7191_init);
+module_exit(saa7191_exit);
+
+MODULE_DESCRIPTION("Philips SAA7191 video decoder driver");
+MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>");
+MODULE_LICENSE("GPL");