patch-2.3.30 linux/drivers/char/saa7110.c

• Lines: 430
• Date: Sat Nov 27 15:27:48 1999
• Orig file: v2.3.29/linux/drivers/char/saa7110.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.29/linux/drivers/char/saa7110.c linux/drivers/char/saa7110.c
@@ -0,0 +1,429 @@
+/*
+    saa7110 - Philips SAA7110(A) video decoder driver
+
+    Copyright (C) 1998 Pauline Middelink <middelin@polyware.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/module.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include <linux/i2c.h>
+#include <linux/videodev.h>
+#include "linux/video_decoder.h"
+
+#define DEBUG(x...)	x		/* remove when no long debugging */
+
+#define SAA7110_MAX_INPUT	9	/* 6 CVBS, 3 SVHS */
+#define SAA7110_MAX_OUTPUT	0	/* its a decoder only */
+
+#define	I2C_SAA7110		0x9C	/* or 0x9E */
+
+#define	I2C_DELAY		10	/* 10 us or 100khz */
+
+struct saa7110 {
+	struct	i2c_bus	*bus;
+	int		addr;
+	unsigned char	reg[36];
+
+	int		norm;
+	int		input;
+	int		enable;
+	int		bright;
+	int		contrast;
+	int		hue;
+	int		sat;
+};
+
+/* ----------------------------------------------------------------------- */
+/* I2C support functions						   */
+/* ----------------------------------------------------------------------- */
+static
+int saa7110_write(struct saa7110 *decoder, unsigned char subaddr, unsigned char data)
+{
+	int ack;
+
+	LOCK_I2C_BUS(decoder->bus);
+	i2c_start(decoder->bus);
+	i2c_sendbyte(decoder->bus, decoder->addr, I2C_DELAY);
+	i2c_sendbyte(decoder->bus, subaddr, I2C_DELAY);
+	ack = i2c_sendbyte(decoder->bus, data, I2C_DELAY);
+	i2c_stop(decoder->bus);
+	decoder->reg[subaddr] = data;
+	UNLOCK_I2C_BUS(decoder->bus);
+	return ack;
+}
+
+static
+int saa7110_write_block(struct saa7110* decoder, unsigned const char *data, unsigned int len)
+{
+	unsigned subaddr = *data;
+
+	LOCK_I2C_BUS(decoder->bus);
+        i2c_start(decoder->bus);
+        i2c_sendbyte(decoder->bus,decoder->addr,I2C_DELAY);
+	while (len-- > 0) {
+                if (i2c_sendbyte(decoder->bus,*data,0)) {
+                        i2c_stop(decoder->bus);
+                        return -EAGAIN;
+                }
+		decoder->reg[subaddr++] = *data++;
+        }
+	i2c_stop(decoder->bus);
+	UNLOCK_I2C_BUS(decoder->bus);
+
+	return 0;
+}
+
+static
+int saa7110_read(struct saa7110* decoder)
+{
+	int data;
+
+	LOCK_I2C_BUS(decoder->bus);
+	i2c_start(decoder->bus);
+	i2c_sendbyte(decoder->bus, decoder->addr, I2C_DELAY);
+	i2c_start(decoder->bus);
+	i2c_sendbyte(decoder->bus, decoder->addr | 1, I2C_DELAY);
+	data = i2c_readbyte(decoder->bus, 1);
+	i2c_stop(decoder->bus);
+	UNLOCK_I2C_BUS(decoder->bus);
+	return data;
+}
+
+/* ----------------------------------------------------------------------- */
+/* SAA7110 functions							   */
+/* ----------------------------------------------------------------------- */
+static
+int saa7110_selmux(struct i2c_device *device, int chan)
+{
+static	const unsigned char modes[9][8] = {
+/* mode 0 */	{ 0x00, 0xD9, 0x17, 0x40, 0x03, 0x44, 0x75, 0x16 },
+/* mode 1 */	{ 0x00, 0xD8, 0x17, 0x40, 0x03, 0x44, 0x75, 0x16 },
+/* mode 2 */	{ 0x00, 0xBA, 0x07, 0x91, 0x03, 0x60, 0xB5, 0x05 },
+/* mode 3 */	{ 0x00, 0xB8, 0x07, 0x91, 0x03, 0x60, 0xB5, 0x05 },
+/* mode 4 */	{ 0x00, 0x7C, 0x07, 0xD2, 0x83, 0x60, 0xB5, 0x03 },
+/* mode 5 */	{ 0x00, 0x78, 0x07, 0xD2, 0x83, 0x60, 0xB5, 0x03 },
+/* mode 6 */	{ 0x80, 0x59, 0x17, 0x42, 0xA3, 0x44, 0x75, 0x12 },
+/* mode 7 */	{ 0x80, 0x9A, 0x17, 0xB1, 0x13, 0x60, 0xB5, 0x14 },
+/* mode 8 */	{ 0x80, 0x3C, 0x27, 0xC1, 0x23, 0x44, 0x75, 0x21 } };
+	struct saa7110* decoder = device->data;
+	const unsigned char* ptr = modes[chan];
+
+	saa7110_write(decoder,0x06,ptr[0]);	/* Luminance control	*/
+	saa7110_write(decoder,0x20,ptr[1]);	/* Analog Control #1	*/
+	saa7110_write(decoder,0x21,ptr[2]);	/* Analog Control #2	*/
+	saa7110_write(decoder,0x22,ptr[3]);	/* Mixer Control #1	*/
+	saa7110_write(decoder,0x2C,ptr[4]);	/* Mixer Control #2	*/
+	saa7110_write(decoder,0x30,ptr[5]);	/* ADCs gain control	*/
+	saa7110_write(decoder,0x31,ptr[6]);	/* Mixer Control #3	*/
+	saa7110_write(decoder,0x21,ptr[7]);	/* Analog Control #2	*/
+
+	return 0;
+}
+
+static
+int determine_norm(struct i2c_device* dev)
+{
+	struct	saa7110* decoder = dev->data;
+	int	status;
+
+	/* mode changed, start automatic detection */
+	status = saa7110_read(decoder);
+	if ((status & 3) == 0) {
+		saa7110_write(decoder,0x06,0x80);
+		if (status & 0x20) {
+			DEBUG(printk(KERN_INFO "%s: norm=bw60\n",dev->name));
+			saa7110_write(decoder,0x2E,0x81);
+			return VIDEO_MODE_NTSC;
+		}
+		DEBUG(printk(KERN_INFO "%s: norm=bw50\n",dev->name));
+		saa7110_write(decoder,0x2E,0x9A);
+		return VIDEO_MODE_PAL;
+	}
+
+	saa7110_write(decoder,0x06,0x00);
+	if (status & 0x20) {	/* 60Hz */
+		DEBUG(printk(KERN_INFO "%s: norm=ntsc\n",dev->name));
+		saa7110_write(decoder,0x0D,0x06);
+		saa7110_write(decoder,0x11,0x2C);
+		saa7110_write(decoder,0x2E,0x81);
+		return VIDEO_MODE_NTSC;
+	}
+
+	/* 50Hz -> PAL/SECAM */
+	saa7110_write(decoder,0x0D,0x06);
+	saa7110_write(decoder,0x11,0x59);
+	saa7110_write(decoder,0x2E,0x9A);
+
+	mdelay(150);	/* pause 150 ms */
+
+	status = saa7110_read(decoder);
+	if ((status & 0x03) == 0x01) {
+		DEBUG(printk(KERN_INFO "%s: norm=secam\n",dev->name));
+		saa7110_write(decoder,0x0D,0x07);
+		return VIDEO_MODE_SECAM;
+	}
+	DEBUG(printk(KERN_INFO "%s: norm=pal\n",dev->name));
+	return VIDEO_MODE_PAL;
+}
+
+static
+int saa7110_attach(struct i2c_device *device)
+{
+static	const unsigned char initseq[] = {
+	     0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF0, 0x00, 0x00,
+		0xF8, 0xF8, 0x60, 0x60, 0x00, 0x06, 0x18, 0x90,
+		0x00, 0x2C, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
+		0xF0, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0xD9, 0x17, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
+		0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x81, 0x03,
+		0x40, 0x75, 0x01, 0x8C, 0x03};
+	struct	saa7110*	decoder;
+	int			rv;
+
+	device->data = decoder = kmalloc(sizeof(struct saa7110), GFP_KERNEL);
+	if (device->data == 0)
+		return -ENOMEM;
+
+	MOD_INC_USE_COUNT;
+
+	/* clear our private data */
+	memset(decoder, 0, sizeof(struct saa7110));
+	strcpy(device->name, "saa7110");
+	decoder->bus = device->bus;
+	decoder->addr = device->addr;
+	decoder->norm = VIDEO_MODE_PAL;
+	decoder->input = 0;
+	decoder->enable = 1;
+	decoder->bright = 32768;
+	decoder->contrast = 32768;
+	decoder->hue = 32768;
+	decoder->sat = 32768;
+
+	rv = saa7110_write_block(decoder, initseq, sizeof(initseq));
+	if (rv < 0)
+		printk(KERN_ERR "%s_attach: init status %d\n", device->name, rv);
+	else {
+		saa7110_write(decoder,0x21,0x16);
+		saa7110_write(decoder,0x0D,0x04);
+		printk(KERN_INFO "%s_attach: chip version %x\n", device->name, saa7110_read(decoder));
+		saa7110_write(decoder,0x0D,0x06);
+	}
+
+	/* setup and implicit mode 0 select has been performed */
+	return 0;
+}
+
+static
+int saa7110_detach(struct i2c_device *device)
+{
+	struct saa7110* decoder = device->data;
+
+	DEBUG(printk(KERN_INFO "%s_detach\n",device->name));
+
+	/* stop further output */
+	saa7110_write(decoder,0x0E,0x00);
+
+	kfree(device->data);
+
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static
+int saa7110_command(struct i2c_device *device, unsigned int cmd, void *arg)
+{
+	struct saa7110* decoder = device->data;
+	int	v;
+
+	switch (cmd) {
+	 case DECODER_GET_CAPABILITIES:
+		{
+			struct video_decoder_capability *dc = arg;
+			dc->flags = VIDEO_DECODER_PAL
+				  | VIDEO_DECODER_NTSC
+				  | VIDEO_DECODER_SECAM
+				  | VIDEO_DECODER_AUTO
+				  | VIDEO_DECODER_CCIR;
+			dc->inputs = SAA7110_MAX_INPUT;
+			dc->outputs = SAA7110_MAX_OUTPUT;
+		}
+		break;
+
+	 case DECODER_GET_STATUS:
+		{
+			struct saa7110* decoder = device->data;
+			int status;
+			int res = 0;
+
+			status = i2c_read(device->bus,device->addr|1);
+			if (status & 0x40)
+				res |= DECODER_STATUS_GOOD;
+			if (status & 0x03)
+				res |= DECODER_STATUS_COLOR;
+
+			switch (decoder->norm) {
+			 case VIDEO_MODE_NTSC:
+				res |= DECODER_STATUS_NTSC;
+				break;
+			 case VIDEO_MODE_PAL:
+				res |= DECODER_STATUS_PAL;
+				break;
+			 case VIDEO_MODE_SECAM:
+				res |= DECODER_STATUS_SECAM;
+				break;
+			}
+			*(int*)arg = res;
+		}
+		break;
+
+	 case DECODER_SET_NORM:
+		v = *(int*)arg;
+		if (decoder->norm != v) {
+			decoder->norm = v;
+			saa7110_write(decoder, 0x06, 0x00);
+			switch (v) {
+			 case VIDEO_MODE_NTSC:
+				saa7110_write(decoder, 0x0D, 0x06);
+				saa7110_write(decoder, 0x11, 0x2C);
+				saa7110_write(decoder, 0x30, 0x81);
+saa7110_write(decoder, 0x2A, 0xDF);
+				break;
+			 case VIDEO_MODE_PAL:
+				saa7110_write(decoder, 0x0D, 0x06);
+				saa7110_write(decoder, 0x11, 0x59);
+				saa7110_write(decoder, 0x2E, 0x9A);
+				break;
+			 case VIDEO_MODE_SECAM:
+				saa7110_write(decoder, 0x0D, 0x07);
+				saa7110_write(decoder, 0x11, 0x59);
+				saa7110_write(decoder, 0x2E, 0x9A);
+				break;
+			 case VIDEO_MODE_AUTO:
+				*(int*)arg = determine_norm(device);
+				break;
+			 default:
+				return -EPERM;
+			}
+		}
+		break;
+
+	 case DECODER_SET_INPUT:
+		v = *(int*)arg;
+		if (v<0 || v>SAA7110_MAX_INPUT)
+			return -EINVAL;
+		if (decoder->input != v) {
+			decoder->input = v;
+			saa7110_selmux(device, v);
+		}
+		break;
+
+	 case DECODER_SET_OUTPUT:
+		v = *(int*)arg;
+		/* not much choice of outputs */
+		if (v != 0)
+			return -EINVAL;
+		break;
+
+	 case DECODER_ENABLE_OUTPUT:
+		v = *(int*)arg;
+		if (decoder->enable != v) {
+			decoder->enable = v;
+			saa7110_write(decoder,0x0E, v ? 0x18 : 0x00);
+		}
+		break;
+
+	 case DECODER_SET_PICTURE:
+		{
+			struct video_picture *pic = arg;
+
+			if (decoder->bright != pic->brightness) {
+				/* We want 0 to 255 we get 0-65535 */
+				decoder->bright = pic->brightness;
+				saa7110_write(decoder, 0x19, decoder->bright >> 8);
+			}
+			if (decoder->contrast != pic->contrast) {
+				/* We want 0 to 127 we get 0-65535 */
+				decoder->contrast = pic->contrast;
+				saa7110_write(decoder, 0x13, decoder->contrast >> 9);
+			}
+			if (decoder->sat != pic->colour) {
+				/* We want 0 to 127 we get 0-65535 */
+				decoder->sat = pic->colour;
+				saa7110_write(decoder, 0x12, decoder->sat >> 9);
+			}
+			if (decoder->hue != pic->hue) {
+				/* We want -128 to 127 we get 0-65535 */
+				decoder->hue = pic->hue;
+				saa7110_write(decoder, 0x07, (decoder->hue>>8)-128);
+			}
+		}
+		break;
+
+	 case DECODER_DUMP:
+		for (v=0; v<34; v+=16) {
+			int j;
+			DEBUG(printk(KERN_INFO "%s: %03x\n",device->name,v));
+			for (j=0; j<16; j++) {
+				DEBUG(printk(KERN_INFO " %02x",decoder->reg[v+j]));
+			}
+			DEBUG(printk(KERN_INFO "\n"));
+		}
+		break;
+
+	 default:
+		DEBUG(printk(KERN_INFO "unknown saa7110_command??(%d)\n",cmd));
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+struct i2c_driver i2c_driver_saa7110 =
+{
+	"saa7110",			/* name */
+
+	I2C_DRIVERID_VIDEODECODER,	/* in i2c.h */
+	I2C_SAA7110, I2C_SAA7110+1,	/* Addr range */
+
+	saa7110_attach,
+	saa7110_detach,
+	saa7110_command
+};
+
+EXPORT_NO_SYMBOLS;
+
+#ifdef MODULE
+int init_module(void)
+#else
+int saa7110_init(void)
+#endif
+{
+	return i2c_register_driver(&i2c_driver_saa7110);
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	i2c_unregister_driver(&i2c_driver_saa7110);
+}
+#endif