patch-2.4.5 linux/drivers/media/video/bt856.c
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- Lines: 304
- Date:
Sat May 19 17:43:06 2001
- Orig file:
v2.4.4/linux/drivers/media/video/bt856.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.4/linux/drivers/media/video/bt856.c linux/drivers/media/video/bt856.c
@@ -0,0 +1,303 @@
+/*
+ bt856 - BT856A Digital Video Encoder (Rockwell Part)
+
+ Copyright (C) 1999 Mike Bernson <mike@mlb.org>
+ Copyright (C) 1998 Dave Perks <dperks@ibm.net>
+
+ Modifications for LML33/DC10plus unified driver
+ Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
+
+ This code was modify/ported from the saa7111 driver written
+ by Dave Perks.
+
+ 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/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/malloc.h>
+#include <linux/mm.h>
+#include <linux/pci.h>
+#include <linux/signal.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <linux/sched.h>
+#include <asm/segment.h>
+#include <linux/types.h>
+#include <linux/wrapper.h>
+
+#include <linux/videodev.h>
+#include <linux/version.h>
+#include <asm/uaccess.h>
+
+#include <linux/i2c-old.h>
+#include <linux/video_encoder.h>
+
+#define DEBUG(x) x /* Debug driver */
+
+/* ----------------------------------------------------------------------- */
+
+struct bt856 {
+ struct i2c_bus *bus;
+ int addr;
+ unsigned char reg[128];
+
+ int norm;
+ int enable;
+ int bright;
+ int contrast;
+ int hue;
+ int sat;
+};
+
+#define I2C_BT856 0x88
+
+#define I2C_DELAY 10
+
+/* ----------------------------------------------------------------------- */
+
+static int bt856_write(struct bt856 *dev, unsigned char subaddr,
+ unsigned char data)
+{
+ int ack;
+
+ LOCK_I2C_BUS(dev->bus);
+
+ i2c_start(dev->bus);
+ i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
+ i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
+ ack = i2c_sendbyte(dev->bus, data, I2C_DELAY);
+ dev->reg[subaddr] = data;
+ i2c_stop(dev->bus);
+ UNLOCK_I2C_BUS(dev->bus);
+ return ack;
+}
+
+static int bt856_setbit(struct bt856 *dev, int subaddr, int bit, int data)
+{
+ return bt856_write(dev, subaddr,(dev->reg[subaddr] & ~(1 << bit)) | (data ? (1 << bit) : 0));
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int bt856_attach(struct i2c_device *device)
+{
+ struct bt856 *encoder;
+
+ /* This chip is not on the buz card but at the same address saa7185 */
+ //if (memcmp(device->bus->name, "buz", 3) == 0 || memcmp(device->bus->name, "zr36057", 6) == 0)
+ // return 1;
+
+ MOD_INC_USE_COUNT;
+ device->data = encoder = kmalloc(sizeof(struct bt856), GFP_KERNEL);
+
+ if (encoder == NULL) {
+ MOD_DEC_USE_COUNT;
+ return -ENOMEM;
+ }
+
+
+ memset(encoder, 0, sizeof(struct bt856));
+ strcpy(device->name, "bt856");
+ encoder->bus = device->bus;
+ encoder->addr = device->addr;
+ encoder->norm = VIDEO_MODE_NTSC;
+ encoder->enable = 1;
+
+ DEBUG(printk(KERN_INFO "%s-bt856: attach\n", encoder->bus->name));
+
+ bt856_write(encoder, 0xdc, 0x18);
+ bt856_write(encoder, 0xda, 0);
+ bt856_write(encoder, 0xde, 0);
+
+ bt856_setbit(encoder, 0xdc, 3, 1);
+ //bt856_setbit(encoder, 0xdc, 6, 0);
+ bt856_setbit(encoder, 0xdc, 4, 1);
+
+ switch (encoder->norm) {
+
+ case VIDEO_MODE_NTSC:
+ bt856_setbit(encoder, 0xdc, 2, 0);
+ break;
+
+ case VIDEO_MODE_PAL:
+ bt856_setbit(encoder, 0xdc, 2, 1);
+ break;
+ }
+
+ bt856_setbit(encoder, 0xdc, 1, 1);
+ bt856_setbit(encoder, 0xde, 4, 0);
+ bt856_setbit(encoder, 0xde, 3, 1);
+ return 0;
+}
+
+
+static int bt856_detach(struct i2c_device *device)
+{
+ kfree(device->data);
+ MOD_DEC_USE_COUNT;
+ return 0;
+}
+
+static int bt856_command(struct i2c_device *device, unsigned int cmd,
+ void *arg)
+{
+ struct bt856 *encoder = device->data;
+
+ switch (cmd) {
+
+ case ENCODER_GET_CAPABILITIES:
+ {
+ struct video_encoder_capability *cap = arg;
+
+ DEBUG(printk
+ (KERN_INFO "%s-bt856: get capabilities\n",
+ encoder->bus->name));
+
+ cap->flags
+ = VIDEO_ENCODER_PAL
+ | VIDEO_ENCODER_NTSC | VIDEO_ENCODER_CCIR;
+ cap->inputs = 2;
+ cap->outputs = 1;
+ }
+ break;
+
+ case ENCODER_SET_NORM:
+ {
+ int *iarg = arg;
+
+ DEBUG(printk(KERN_INFO "%s-bt856: set norm %d\n",
+ encoder->bus->name, *iarg));
+
+ switch (*iarg) {
+
+ case VIDEO_MODE_NTSC:
+ bt856_setbit(encoder, 0xdc, 2, 0);
+ break;
+
+ case VIDEO_MODE_PAL:
+ bt856_setbit(encoder, 0xdc, 2, 1);
+ bt856_setbit(encoder, 0xda, 0, 0);
+ //bt856_setbit(encoder, 0xda, 0, 1);
+ break;
+
+ default:
+ return -EINVAL;
+
+ }
+ encoder->norm = *iarg;
+ }
+ break;
+
+ case ENCODER_SET_INPUT:
+ {
+ int *iarg = arg;
+
+ DEBUG(printk(KERN_INFO "%s-bt856: set input %d\n",
+ encoder->bus->name, *iarg));
+
+ /* We only have video bus.
+ *iarg = 0: input is from bt819
+ *iarg = 1: input is from ZR36060 */
+
+ switch (*iarg) {
+
+ case 0:
+ bt856_setbit(encoder, 0xde, 4, 0);
+ bt856_setbit(encoder, 0xde, 3, 1);
+ bt856_setbit(encoder, 0xdc, 3, 1);
+ bt856_setbit(encoder, 0xdc, 6, 0);
+ break;
+ case 1:
+ bt856_setbit(encoder, 0xde, 4, 0);
+ bt856_setbit(encoder, 0xde, 3, 1);
+ bt856_setbit(encoder, 0xdc, 3, 1);
+ bt856_setbit(encoder, 0xdc, 6, 1);
+ break;
+ case 2: // Color bar
+ bt856_setbit(encoder, 0xdc, 3, 0);
+ bt856_setbit(encoder, 0xde, 4, 1);
+ break;
+ default:
+ return -EINVAL;
+
+ }
+ }
+ break;
+
+ case ENCODER_SET_OUTPUT:
+ {
+ int *iarg = arg;
+
+ DEBUG(printk(KERN_INFO "%s-bt856: set output %d\n",
+ encoder->bus->name, *iarg));
+
+ /* not much choice of outputs */
+ if (*iarg != 0) {
+ return -EINVAL;
+ }
+ }
+ break;
+
+ case ENCODER_ENABLE_OUTPUT:
+ {
+ int *iarg = arg;
+
+ encoder->enable = !!*iarg;
+
+ DEBUG(printk
+ (KERN_INFO "%s-bt856: enable output %d\n",
+ encoder->bus->name, encoder->enable));
+ }
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static struct i2c_driver i2c_driver_bt856 = {
+ "bt856", /* name */
+ I2C_DRIVERID_VIDEOENCODER, /* ID */
+ I2C_BT856, I2C_BT856 + 1,
+ bt856_attach,
+ bt856_detach,
+ bt856_command
+};
+
+EXPORT_NO_SYMBOLS;
+
+static int bt856_init(void)
+{
+ return i2c_register_driver(&i2c_driver_bt856);
+}
+
+static void bt856_exit(void)
+{
+ i2c_unregister_driver(&i2c_driver_bt856);
+}
+
+module_init(bt856_init);
+module_exit(bt856_exit);
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