V4L/DVB (10721): bt856: convert to v4l2_subdev.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 139 insertions, 107 deletions

diff --git a/drivers/media/video/bt856.c b/drivers/media/video/bt856.c
index 3e042c5ddaa7..182da6ab3845 100644
--- a/drivers/media/video/bt856.c
+++ b/drivers/media/video/bt856.c
@@ -34,9 +34,9 @@
 #include <asm/uaccess.h>
 #include <linux/i2c.h>
 #include <linux/i2c-id.h>
-#include <linux/videodev.h>
-#include <linux/video_encoder.h>
-#include <media/v4l2-common.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
 #include <media/v4l2-i2c-drv-legacy.h>
 
 MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
@@ -47,42 +47,49 @@ static int debug;
 module_param(debug, int, 0);
 MODULE_PARM_DESC(debug, "Debug level (0-1)");
 
+static unsigned short normal_i2c[] = { 0x88 >> 1, I2C_CLIENT_END };
+
+I2C_CLIENT_INSMOD;
+
 /* ----------------------------------------------------------------------- */
 
 #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 i2c_client *client, u8 reg, u8 value)
+static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value)
 {
-	struct bt856 *encoder = i2c_get_clientdata(client);
+	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 i2c_client *client, u8 reg, u8 bit, u8 value)
+static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value)
 {
-	struct bt856 *encoder = i2c_get_clientdata(client);
-
-	return bt856_write(client, reg,
+	return bt856_write(encoder, reg,
 		(encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) |
 				(value ? (1 << bit) : 0));
 }
 
-static void bt856_dump(struct i2c_client *client)
+static void bt856_dump(struct bt856 *encoder)
 {
 	int i;
-	struct bt856 *encoder = i2c_get_clientdata(client);
 
-	v4l_info(client, "register dump:\n");
+	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");
@@ -90,107 +97,125 @@ static void bt856_dump(struct i2c_client *client)
 
 /* ----------------------------------------------------------------------- */
 
-static int bt856_command(struct i2c_client *client, unsigned cmd, void *arg)
+static int bt856_init(struct v4l2_subdev *sd, u32 arg)
 {
-	struct bt856 *encoder = i2c_get_clientdata(client);
-
-	switch (cmd) {
-	case VIDIOC_INT_INIT:
-		/* This is just for testing!!! */
-		v4l_dbg(1, debug, client, "init\n");
-		bt856_write(client, 0xdc, 0x18);
-		bt856_write(client, 0xda, 0);
-		bt856_write(client, 0xde, 0);
-
-		bt856_setbit(client, 0xdc, 3, 1);
-		//bt856_setbit(client, 0xdc, 6, 0);
-		bt856_setbit(client, 0xdc, 4, 1);
-
-		if (encoder->norm & V4L2_STD_NTSC)
-			bt856_setbit(client, 0xdc, 2, 0);
-		else
-			bt856_setbit(client, 0xdc, 2, 1);
-
-		bt856_setbit(client, 0xdc, 1, 1);
-		bt856_setbit(client, 0xde, 4, 0);
-		bt856_setbit(client, 0xde, 3, 1);
-		if (debug != 0)
-			bt856_dump(client);
-		break;
+	struct bt856 *encoder = to_bt856(sd);
 
-	case VIDIOC_INT_S_STD_OUTPUT:
-	{
-		v4l2_std_id *iarg = arg;
-
-		v4l_dbg(1, debug, client, "set norm %llx\n", *iarg);
-
-		if (*iarg & V4L2_STD_NTSC) {
-			bt856_setbit(client, 0xdc, 2, 0);
-		} else if (*iarg & V4L2_STD_PAL) {
-			bt856_setbit(client, 0xdc, 2, 1);
-			bt856_setbit(client, 0xda, 0, 0);
-			//bt856_setbit(client, 0xda, 0, 1);
-		} else {
-			return -EINVAL;
-		}
-		encoder->norm = *iarg;
-		if (debug != 0)
-			bt856_dump(client);
-		break;
-	}
+	/* 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);
 
-	case VIDIOC_INT_S_VIDEO_ROUTING:
-	{
-		struct v4l2_routing *route = arg;
-
-		v4l_dbg(1, debug, client, "set input %d\n", route->input);
-
-		/* We only have video bus.
-		 * route->input= 0: input is from bt819
-		 * route->input= 1: input is from ZR36060 */
-		switch (route->input) {
-		case 0:
-			bt856_setbit(client, 0xde, 4, 0);
-			bt856_setbit(client, 0xde, 3, 1);
-			bt856_setbit(client, 0xdc, 3, 1);
-			bt856_setbit(client, 0xdc, 6, 0);
-			break;
-		case 1:
-			bt856_setbit(client, 0xde, 4, 0);
-			bt856_setbit(client, 0xde, 3, 1);
-			bt856_setbit(client, 0xdc, 3, 1);
-			bt856_setbit(client, 0xdc, 6, 1);
-			break;
-		case 2:	// Color bar
-			bt856_setbit(client, 0xdc, 3, 0);
-			bt856_setbit(client, 0xde, 4, 1);
-			break;
-		default:
-			return -EINVAL;
-		}
-
-		if (debug != 0)
-			bt856_dump(client);
-		break;
+	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", 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, const struct v4l2_routing *route)
+{
+	struct bt856 *encoder = to_bt856(sd);
+
+	v4l2_dbg(1, debug, sd, "set input %d\n", route->input);
+
+	/* We only have video bus.
+	 * route->input= 0: input is from bt819
+	 * route->input= 1: input is from ZR36060 */
+	switch (route->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 int bt856_command(struct i2c_client *client, unsigned cmd, void *arg)
+{
+	return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
+}
+
 /* ----------------------------------------------------------------------- */
 
-static unsigned short normal_i2c[] = { 0x88 >> 1, I2C_CLIENT_END };
+static const struct v4l2_subdev_core_ops bt856_core_ops = {
+	.g_chip_ident = bt856_g_chip_ident,
+	.init = bt856_init,
+};
 
-I2C_CLIENT_INSMOD;
+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))
@@ -202,34 +227,38 @@ static int bt856_probe(struct i2c_client *client,
 	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;
-	i2c_set_clientdata(client, encoder);
 
-	bt856_write(client, 0xdc, 0x18);
-	bt856_write(client, 0xda, 0);
-	bt856_write(client, 0xde, 0);
+	bt856_write(encoder, 0xdc, 0x18);
+	bt856_write(encoder, 0xda, 0);
+	bt856_write(encoder, 0xde, 0);
 
-	bt856_setbit(client, 0xdc, 3, 1);
-	//bt856_setbit(client, 0xdc, 6, 0);
-	bt856_setbit(client, 0xdc, 4, 1);
+	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(client, 0xdc, 2, 0);
+		bt856_setbit(encoder, 0xdc, 2, 0);
 	else
-		bt856_setbit(client, 0xdc, 2, 1);
+		bt856_setbit(encoder, 0xdc, 2, 1);
 
-	bt856_setbit(client, 0xdc, 1, 1);
-	bt856_setbit(client, 0xde, 4, 0);
-	bt856_setbit(client, 0xde, 3, 1);
+	bt856_setbit(encoder, 0xdc, 1, 1);
+	bt856_setbit(encoder, 0xde, 4, 0);
+	bt856_setbit(encoder, 0xde, 3, 1);
 
 	if (debug != 0)
-		bt856_dump(client);
+		bt856_dump(encoder);
 	return 0;
 }
 
 static int bt856_remove(struct i2c_client *client)
 {
-	kfree(i2c_get_clientdata(client));
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+	v4l2_device_unregister_subdev(sd);
+	kfree(to_bt856(sd));
 	return 0;
 }
 
diff --git a/include/media/v4l2-chip-ident.h b/include/media/v4l2-chip-ident.h
index 0766106beb82..69e3092fd288 100644
--- a/include/media/v4l2-chip-ident.h
+++ b/include/media/v4l2-chip-ident.h
@@ -76,6 +76,9 @@ enum {
 	V4L2_IDENT_BT817A = 817,
 	V4L2_IDENT_BT819A = 819,
 
+	/* module bt856: just ident 856 */
+	V4L2_IDENT_BT856 = 856,
+
 	/* module bt866: just ident 866 */
 	V4L2_IDENT_BT866 = 866,