1 files changed, 273 insertions, 0 deletions
diff --git a/drivers/media/i2c/bt856.c b/drivers/media/i2c/bt856.c
new file mode 100644
index 0000000..7e5bd36
--- /dev/null
+++ b/drivers/media/i2c/bt856.c
@@ -0,0 +1,273 @@
+/*
+ * 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.
+ *
+ * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *   - moved over to linux>=2.4.x i2c protocol (9/9/2002)
+ *
+ * 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/slab.h>
+#include <linux/ioctl.h>
+#include <asm/uaccess.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+
+MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
+MODULE_AUTHOR("Mike Bernson & Dave Perks");
+MODULE_LICENSE("GPL");
+
+static int debug;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
+
+
+/* ----------------------------------------------------------------------- */
+
+#define BT856_REG_OFFSET	0xDA
+#define BT856_NR_REG		6
+
+struct bt856 {
+	struct v4l2_subdev sd;
+	unsigned char reg[BT856_NR_REG];
+
+	v4l2_std_id norm;
+};
+
+static inline struct bt856 *to_bt856(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct bt856, sd);
+}
+
+/* ----------------------------------------------------------------------- */
+
+static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
+
+	encoder->reg[reg - BT856_REG_OFFSET] = value;
+	return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value)
+{
+	return bt856_write(encoder, reg,
+		(encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) |
+				(value ? (1 << bit) : 0));
+}
+
+static void bt856_dump(struct bt856 *encoder)
+{
+	int i;
+
+	v4l2_info(&encoder->sd, "register dump:\n");
+	for (i = 0; i < BT856_NR_REG; i += 2)
+		printk(KERN_CONT " %02x", encoder->reg[i]);
+	printk(KERN_CONT "\n");
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int bt856_init(struct v4l2_subdev *sd, u32 arg)
+{
+	struct bt856 *encoder = to_bt856(sd);
+
+	/* This is just for testing!!! */
+	v4l2_dbg(1, debug, sd, "init\n");
+	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);
+
+	if (encoder->norm & V4L2_STD_NTSC)
+		bt856_setbit(encoder, 0xdc, 2, 0);
+	else
+		bt856_setbit(encoder, 0xdc, 2, 1);
+
+	bt856_setbit(encoder, 0xdc, 1, 1);
+	bt856_setbit(encoder, 0xde, 4, 0);
+	bt856_setbit(encoder, 0xde, 3, 1);
+	if (debug != 0)
+		bt856_dump(encoder);
+	return 0;
+}
+
+static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
+{
+	struct bt856 *encoder = to_bt856(sd);
+
+	v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
+
+	if (std & V4L2_STD_NTSC) {
+		bt856_setbit(encoder, 0xdc, 2, 0);
+	} else if (std & V4L2_STD_PAL) {
+		bt856_setbit(encoder, 0xdc, 2, 1);
+		bt856_setbit(encoder, 0xda, 0, 0);
+		/*bt856_setbit(encoder, 0xda, 0, 1);*/
+	} else {
+		return -EINVAL;
+	}
+	encoder->norm = std;
+	if (debug != 0)
+		bt856_dump(encoder);
+	return 0;
+}
+
+static int bt856_s_routing(struct v4l2_subdev *sd,
+			   u32 input, u32 output, u32 config)
+{
+	struct bt856 *encoder = to_bt856(sd);
+
+	v4l2_dbg(1, debug, sd, "set input %d\n", input);
+
+	/* We only have video bus.
+	 * input= 0: input is from bt819
+	 * input= 1: input is from ZR36060 */
+	switch (input) {
+	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;
+	}
+
+	if (debug != 0)
+		bt856_dump(encoder);
+	return 0;
+}
+
+static int bt856_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT856, 0);
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_subdev_core_ops bt856_core_ops = {
+	.g_chip_ident = bt856_g_chip_ident,
+	.init = bt856_init,
+};
+
+static const struct v4l2_subdev_video_ops bt856_video_ops = {
+	.s_std_output = bt856_s_std_output,
+	.s_routing = bt856_s_routing,
+};
+
+static const struct v4l2_subdev_ops bt856_ops = {
+	.core = &bt856_core_ops,
+	.video = &bt856_video_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static int bt856_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	struct bt856 *encoder;
+	struct v4l2_subdev *sd;
+
+	/* Check if the adapter supports the needed features */
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -ENODEV;
+
+	v4l_info(client, "chip found @ 0x%x (%s)\n",
+			client->addr << 1, client->adapter->name);
+
+	encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
+	if (encoder == NULL)
+		return -ENOMEM;
+	sd = &encoder->sd;
+	v4l2_i2c_subdev_init(sd, client, &bt856_ops);
+	encoder->norm = V4L2_STD_NTSC;
+
+	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);
+
+	if (encoder->norm & V4L2_STD_NTSC)
+		bt856_setbit(encoder, 0xdc, 2, 0);
+	else
+		bt856_setbit(encoder, 0xdc, 2, 1);
+
+	bt856_setbit(encoder, 0xdc, 1, 1);
+	bt856_setbit(encoder, 0xde, 4, 0);
+	bt856_setbit(encoder, 0xde, 3, 1);
+
+	if (debug != 0)
+		bt856_dump(encoder);
+	return 0;
+}
+
+static int bt856_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+	v4l2_device_unregister_subdev(sd);
+	kfree(to_bt856(sd));
+	return 0;
+}
+
+static const struct i2c_device_id bt856_id[] = {
+	{ "bt856", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, bt856_id);
+
+static struct i2c_driver bt856_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= "bt856",
+	},
+	.probe		= bt856_probe,
+	.remove		= bt856_remove,
+	.id_table	= bt856_id,
+};
+
+module_i2c_driver(bt856_driver);