V4L/DVB (11116): ov7670: cleanup and remove legacy code.

v4l2-i2c-drv-legacy.h and ov7670_command are no longer needed after the
cafe driver is converted to use v4l2_subdev.

Rather than using a large ov7670_control array, just call the handlers
via a simple switch and use v4l2_ctrl_query_fill() to handle queryctrl.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/ov7670.c

@@ -17,7 +17,7 @@
 #include <linux/videodev2.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-chip-ident.h>
-#include <media/v4l2-i2c-drv-legacy.h>
+#include <media/v4l2-i2c-drv.h>
 
 
 MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>");
@@ -962,7 +962,7 @@ static void ov7670_calc_cmatrix(struct ov7670_info *info,
 
 
 
-static int ov7670_t_sat(struct v4l2_subdev *sd, int value)
+static int ov7670_s_sat(struct v4l2_subdev *sd, int value)
 {
 	struct ov7670_info *info = to_state(sd);
 	int matrix[CMATRIX_LEN];
@@ -974,7 +974,7 @@ static int ov7670_t_sat(struct v4l2_subdev *sd, int value)
 	return ret;
 }
 
-static int ov7670_q_sat(struct v4l2_subdev *sd, __s32 *value)
+static int ov7670_g_sat(struct v4l2_subdev *sd, __s32 *value)
 {
 	struct ov7670_info *info = to_state(sd);
 
@@ -982,7 +982,7 @@ static int ov7670_q_sat(struct v4l2_subdev *sd, __s32 *value)
 	return 0;
 }
 
-static int ov7670_t_hue(struct v4l2_subdev *sd, int value)
+static int ov7670_s_hue(struct v4l2_subdev *sd, int value)
 {
 	struct ov7670_info *info = to_state(sd);
 	int matrix[CMATRIX_LEN];
@@ -997,7 +997,7 @@ static int ov7670_t_hue(struct v4l2_subdev *sd, int value)
 }
 
 
-static int ov7670_q_hue(struct v4l2_subdev *sd, __s32 *value)
+static int ov7670_g_hue(struct v4l2_subdev *sd, __s32 *value)
 {
 	struct ov7670_info *info = to_state(sd);
 
@@ -1024,7 +1024,7 @@ static unsigned char ov7670_abs_to_sm(unsigned char v)
 	return (128 - v) | 0x80;
 }
 
-static int ov7670_t_brightness(struct v4l2_subdev *sd, int value)
+static int ov7670_s_brightness(struct v4l2_subdev *sd, int value)
 {
 	unsigned char com8 = 0, v;
 	int ret;
@@ -1037,7 +1037,7 @@ static int ov7670_t_brightness(struct v4l2_subdev *sd, int value)
 	return ret;
 }
 
-static int ov7670_q_brightness(struct v4l2_subdev *sd, __s32 *value)
+static int ov7670_g_brightness(struct v4l2_subdev *sd, __s32 *value)
 {
 	unsigned char v = 0;
 	int ret = ov7670_read(sd, REG_BRIGHT, &v);
@@ -1046,12 +1046,12 @@ static int ov7670_q_brightness(struct v4l2_subdev *sd, __s32 *value)
 	return ret;
 }
 
-static int ov7670_t_contrast(struct v4l2_subdev *sd, int value)
+static int ov7670_s_contrast(struct v4l2_subdev *sd, int value)
 {
 	return ov7670_write(sd, REG_CONTRAS, (unsigned char) value);
 }
 
-static int ov7670_q_contrast(struct v4l2_subdev *sd, __s32 *value)
+static int ov7670_g_contrast(struct v4l2_subdev *sd, __s32 *value)
 {
 	unsigned char v = 0;
 	int ret = ov7670_read(sd, REG_CONTRAS, &v);
@@ -1060,7 +1060,7 @@ static int ov7670_q_contrast(struct v4l2_subdev *sd, __s32 *value)
 	return ret;
 }
 
-static int ov7670_q_hflip(struct v4l2_subdev *sd, __s32 *value)
+static int ov7670_g_hflip(struct v4l2_subdev *sd, __s32 *value)
 {
 	int ret;
 	unsigned char v = 0;
@@ -1071,7 +1071,7 @@ static int ov7670_q_hflip(struct v4l2_subdev *sd, __s32 *value)
 }
 
 
-static int ov7670_t_hflip(struct v4l2_subdev *sd, int value)
+static int ov7670_s_hflip(struct v4l2_subdev *sd, int value)
 {
 	unsigned char v = 0;
 	int ret;
@@ -1088,7 +1088,7 @@ static int ov7670_t_hflip(struct v4l2_subdev *sd, int value)
 
 
 
-static int ov7670_q_vflip(struct v4l2_subdev *sd, __s32 *value)
+static int ov7670_g_vflip(struct v4l2_subdev *sd, __s32 *value)
 {
 	int ret;
 	unsigned char v = 0;
@@ -1099,7 +1099,7 @@ static int ov7670_q_vflip(struct v4l2_subdev *sd, __s32 *value)
 }
 
 
-static int ov7670_t_vflip(struct v4l2_subdev *sd, int value)
+static int ov7670_s_vflip(struct v4l2_subdev *sd, int value)
 {
 	unsigned char v = 0;
 	int ret;
@@ -1114,144 +1114,62 @@ static int ov7670_t_vflip(struct v4l2_subdev *sd, int value)
 	return ret;
 }
 
-
-static struct ov7670_control {
-	struct v4l2_queryctrl qc;
-	int (*query)(struct v4l2_subdev *sd, __s32 *value);
-	int (*tweak)(struct v4l2_subdev *sd, int value);
-} ov7670_controls[] =
-{
-	{
-		.qc = {
-			.id = V4L2_CID_BRIGHTNESS,
-			.type = V4L2_CTRL_TYPE_INTEGER,
-			.name = "Brightness",
-			.minimum = 0,
-			.maximum = 255,
-			.step = 1,
-			.default_value = 0x80,
-			.flags = V4L2_CTRL_FLAG_SLIDER
-		},
-		.tweak = ov7670_t_brightness,
-		.query = ov7670_q_brightness,
-	},
-	{
-		.qc = {
-			.id = V4L2_CID_CONTRAST,
-			.type = V4L2_CTRL_TYPE_INTEGER,
-			.name = "Contrast",
-			.minimum = 0,
-			.maximum = 127,
-			.step = 1,
-			.default_value = 0x40,   /* XXX ov7670 spec */
-			.flags = V4L2_CTRL_FLAG_SLIDER
-		},
-		.tweak = ov7670_t_contrast,
-		.query = ov7670_q_contrast,
-	},
-	{
-		.qc = {
-			.id = V4L2_CID_SATURATION,
-			.type = V4L2_CTRL_TYPE_INTEGER,
-			.name = "Saturation",
-			.minimum = 0,
-			.maximum = 256,
-			.step = 1,
-			.default_value = 0x80,
-			.flags = V4L2_CTRL_FLAG_SLIDER
-		},
-		.tweak = ov7670_t_sat,
-		.query = ov7670_q_sat,
-	},
-	{
-		.qc = {
-			.id = V4L2_CID_HUE,
-			.type = V4L2_CTRL_TYPE_INTEGER,
-			.name = "HUE",
-			.minimum = -180,
-			.maximum = 180,
-			.step = 5,
-			.default_value = 0,
-			.flags = V4L2_CTRL_FLAG_SLIDER
-		},
-		.tweak = ov7670_t_hue,
-		.query = ov7670_q_hue,
-	},
-	{
-		.qc = {
-			.id = V4L2_CID_VFLIP,
-			.type = V4L2_CTRL_TYPE_BOOLEAN,
-			.name = "Vertical flip",
-			.minimum = 0,
-			.maximum = 1,
-			.step = 1,
-			.default_value = 0,
-		},
-		.tweak = ov7670_t_vflip,
-		.query = ov7670_q_vflip,
-	},
-	{
-		.qc = {
-			.id = V4L2_CID_HFLIP,
-			.type = V4L2_CTRL_TYPE_BOOLEAN,
-			.name = "Horizontal mirror",
-			.minimum = 0,
-			.maximum = 1,
-			.step = 1,
-			.default_value = 0,
-		},
-		.tweak = ov7670_t_hflip,
-		.query = ov7670_q_hflip,
-	},
-};
-#define N_CONTROLS (ARRAY_SIZE(ov7670_controls))
-
-static struct ov7670_control *ov7670_find_control(__u32 id)
-{
-	int i;
-
-	for (i = 0; i < N_CONTROLS; i++)
-		if (ov7670_controls[i].qc.id == id)
-			return ov7670_controls + i;
-	return NULL;
-}
-
-
 static int ov7670_queryctrl(struct v4l2_subdev *sd,
 		struct v4l2_queryctrl *qc)
 {
-	struct ov7670_control *ctrl = ov7670_find_control(qc->id);
-
-	if (ctrl == NULL)
-		return -EINVAL;
-	*qc = ctrl->qc;
-	return 0;
+	/* Fill in min, max, step and default value for these controls. */
+	switch (qc->id) {
+	case V4L2_CID_BRIGHTNESS:
+		return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
+	case V4L2_CID_CONTRAST:
+		return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64);
+	case V4L2_CID_VFLIP:
+	case V4L2_CID_HFLIP:
+		return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
+	case V4L2_CID_SATURATION:
+		return v4l2_ctrl_query_fill(qc, 0, 256, 1, 128);
+	case V4L2_CID_HUE:
+		return v4l2_ctrl_query_fill(qc, -180, 180, 5, 0);
+	}
+	return -EINVAL;
 }
 
 static int ov7670_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 {
-	struct ov7670_control *octrl = ov7670_find_control(ctrl->id);
-	int ret;
-
-	if (octrl == NULL)
-		return -EINVAL;
-	ret = octrl->query(sd, &ctrl->value);
-	if (ret >= 0)
-		return 0;
-	return ret;
+	switch (ctrl->id) {
+	case V4L2_CID_BRIGHTNESS:
+		return ov7670_g_brightness(sd, &ctrl->value);
+	case V4L2_CID_CONTRAST:
+		return ov7670_g_contrast(sd, &ctrl->value);
+	case V4L2_CID_SATURATION:
+		return ov7670_g_sat(sd, &ctrl->value);
+	case V4L2_CID_HUE:
+		return ov7670_g_hue(sd, &ctrl->value);
+	case V4L2_CID_VFLIP:
+		return ov7670_g_vflip(sd, &ctrl->value);
+	case V4L2_CID_HFLIP:
+		return ov7670_g_hflip(sd, &ctrl->value);
+	}
+	return -EINVAL;
 }
 
 static int ov7670_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 {
-	struct ov7670_control *octrl = ov7670_find_control(ctrl->id);
-	int ret;
-
-	if (octrl == NULL)
-		return -EINVAL;
-	ret = octrl->tweak(sd, ctrl->value);
-	if (ret >= 0)
-		return 0;
-	return ret;
+	switch (ctrl->id) {
+	case V4L2_CID_BRIGHTNESS:
+		return ov7670_s_brightness(sd, ctrl->value);
+	case V4L2_CID_CONTRAST:
+		return ov7670_s_contrast(sd, ctrl->value);
+	case V4L2_CID_SATURATION:
+		return ov7670_s_sat(sd, ctrl->value);
+	case V4L2_CID_HUE:
+		return ov7670_s_hue(sd, ctrl->value);
+	case V4L2_CID_VFLIP:
+		return ov7670_s_vflip(sd, ctrl->value);
+	case V4L2_CID_HFLIP:
+		return ov7670_s_hflip(sd, ctrl->value);
+	}
+	return -EINVAL;
 }
 
 static int ov7670_g_chip_ident(struct v4l2_subdev *sd,
@@ -1262,11 +1180,6 @@ static int ov7670_g_chip_ident(struct v4l2_subdev *sd,
 	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_OV7670, 0);
 }
 
-static int ov7670_command(struct i2c_client *client, unsigned cmd, void *arg)
-{
-	return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
-}
-
 /* ----------------------------------------------------------------------- */
 
 static const struct v4l2_subdev_core_ops ov7670_core_ops = {
@@ -1300,11 +1213,6 @@ static int ov7670_probe(struct i2c_client *client,
 	struct ov7670_info *info;
 	int ret;
 
-	/*
-	 * For now: only deal with adapters we recognize.
-	 */
-	if (client->adapter->id != I2C_HW_SMBUS_CAFE)
-		return -ENODEV;
 	info = kzalloc(sizeof(struct ov7670_info), GFP_KERNEL);
 	if (info == NULL)
 		return -ENOMEM;
@@ -1347,9 +1255,7 @@ MODULE_DEVICE_TABLE(i2c, ov7670_id);
 
 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 	.name = "ov7670",
-	.command = ov7670_command,
 	.probe = ov7670_probe,
 	.remove = ov7670_remove,
-	.legacy_class = I2C_CLASS_TV_ANALOG,
 	.id_table = ov7670_id,
 };