V4L/DVB (8687): soc-camera: Move .power and .reset from soc_camera host to sensor driver

Make .power and .reset callbacks per camera instead of per host, also move
their invocation to camera drivers.

.arch/arm/mach-pxa/include/mach/camera.h    |    2 -
Signed-off-by: Stefan Herbrechtsmeier <hbmeier@hni.uni-paderborn.de>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

arch/arm/mach-pxa/include/mach/camera.h

@@ -36,8 +36,6 @@
 
 struct pxacamera_platform_data {
 	int (*init)(struct device *);
-	int (*power)(struct device *, int);
-	int (*reset)(struct device *, int);
 
 	unsigned long flags;
 	unsigned long mclk_10khz;

drivers/media/video/mt9m001.c

@@ -117,13 +117,33 @@ static int reg_clear(struct soc_camera_device *icd, const u8 reg,
 
 static int mt9m001_init(struct soc_camera_device *icd)
 {
+	struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+	struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
 	int ret;
 
 	dev_dbg(icd->vdev->parent, "%s\n", __func__);
 
-	ret = reg_write(icd, MT9M001_RESET, 1);
-	if (!ret)
-		ret = reg_write(icd, MT9M001_RESET, 0);
+	if (icl->power) {
+		ret = icl->power(&mt9m001->client->dev, 1);
+		if (ret < 0) {
+			dev_err(icd->vdev->parent,
+				"Platform failed to power-on the camera.\n");
+			return ret;
+		}
+	}
+
+	/* The camera could have been already on, we reset it additionally */
+	if (icl->reset)
+		ret = icl->reset(&mt9m001->client->dev);
+	else
+		ret = -ENODEV;
+
+	if (ret < 0) {
+		/* Either no platform reset, or platform reset failed */
+		ret = reg_write(icd, MT9M001_RESET, 1);
+		if (!ret)
+			ret = reg_write(icd, MT9M001_RESET, 0);
+	}
 	/* Disable chip, synchronous option update */
 	if (!ret)
 		ret = reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
@@ -133,8 +153,15 @@ static int mt9m001_init(struct soc_camera_device *icd)
 
 static int mt9m001_release(struct soc_camera_device *icd)
 {
+	struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+	struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
+
 	/* Disable the chip */
 	reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
+
+	if (icl->power)
+		icl->power(&mt9m001->client->dev, 0);
+
 	return 0;
 }
 

drivers/media/video/mt9m111.c

@@ -351,8 +351,18 @@ static int mt9m111_setfmt_yuv(struct soc_camera_device *icd)
 static int mt9m111_enable(struct soc_camera_device *icd)
 {
 	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
+	struct soc_camera_link *icl = mt9m111->client->dev.platform_data;
 	int ret;
 
+	if (icl->power) {
+		ret = icl->power(&mt9m111->client->dev, 1);
+		if (ret < 0) {
+			dev_err(icd->vdev->parent,
+				"Platform failed to power-on the camera.\n");
+			return ret;
+		}
+	}
+
 	ret = reg_set(RESET, MT9M111_RESET_CHIP_ENABLE);
 	if (!ret)
 		mt9m111->powered = 1;
@@ -362,11 +372,16 @@ static int mt9m111_enable(struct soc_camera_device *icd)
 static int mt9m111_disable(struct soc_camera_device *icd)
 {
 	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
+	struct soc_camera_link *icl = mt9m111->client->dev.platform_data;
 	int ret;
 
 	ret = reg_clear(RESET, MT9M111_RESET_CHIP_ENABLE);
 	if (!ret)
 		mt9m111->powered = 0;
+
+	if (icl->power)
+		icl->power(&mt9m111->client->dev, 0);
+
 	return ret;
 }
 

drivers/media/video/mt9v022.c

@@ -134,8 +134,25 @@ static int reg_clear(struct soc_camera_device *icd, const u8 reg,
 static int mt9v022_init(struct soc_camera_device *icd)
 {
 	struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+	struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
 	int ret;
 
+	if (icl->power) {
+		ret = icl->power(&mt9v022->client->dev, 1);
+		if (ret < 0) {
+			dev_err(icd->vdev->parent,
+				"Platform failed to power-on the camera.\n");
+			return ret;
+		}
+	}
+
+	/*
+	 * The camera could have been already on, we hard-reset it additionally,
+	 * if available. Soft reset is done in video_probe().
+	 */
+	if (icl->reset)
+		icl->reset(&mt9v022->client->dev);
+
 	/* Almost the default mode: master, parallel, simultaneous, and an
 	 * undocumented bit 0x200, which is present in table 7, but not in 8,
 	 * plus snapshot mode to disable scan for now */
@@ -161,7 +178,12 @@ static int mt9v022_init(struct soc_camera_device *icd)
 
 static int mt9v022_release(struct soc_camera_device *icd)
 {
-	/* Nothing? */
+	struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+	struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
+
+	if (icl->power)
+		icl->power(&mt9v022->client->dev, 0);
+
 	return 0;
 }
 

drivers/media/video/pxa_camera.c

@@ -629,17 +629,6 @@ static void pxa_camera_activate(struct pxa_camera_dev *pcdev)
 		pdata->init(pcdev->dev);
 	}
 
-	if (pdata && pdata->power) {
-		dev_dbg(pcdev->dev, "%s: Power on camera\n", __func__);
-		pdata->power(pcdev->dev, 1);
-	}
-
-	if (pdata && pdata->reset) {
-		dev_dbg(pcdev->dev, "%s: Releasing camera reset\n",
-			__func__);
-		pdata->reset(pcdev->dev, 1);
-	}
-
 	CICR0 = 0x3FF;   /* disable all interrupts */
 
 	if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
@@ -660,20 +649,7 @@ static void pxa_camera_activate(struct pxa_camera_dev *pcdev)
 
 static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev)
 {
-	struct pxacamera_platform_data *board = pcdev->pdata;
-
 	clk_disable(pcdev->clk);
-
-	if (board && board->reset) {
-		dev_dbg(pcdev->dev, "%s: Asserting camera reset\n",
-			__func__);
-		board->reset(pcdev->dev, 0);
-	}
-
-	if (board && board->power) {
-		dev_dbg(pcdev->dev, "%s: Power off camera\n", __func__);
-		board->power(pcdev->dev, 0);
-	}
 }
 
 static irqreturn_t pxa_camera_irq(int irq, void *data)

drivers/media/video/sh_mobile_ceu_camera.c

@@ -304,9 +304,6 @@ static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 		 "SuperH Mobile CEU driver attached to camera %d\n",
 		 icd->devnum);
 
-	if (pcdev->pdata->enable_camera)
-		pcdev->pdata->enable_camera();
-
 	ret = icd->ops->init(icd);
 	if (ret)
 		goto err;
@@ -333,8 +330,6 @@ static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
 	ceu_write(pcdev, CEIER, 0);
 	ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 	icd->ops->release(icd);
-	if (pcdev->pdata->disable_camera)
-		pcdev->pdata->disable_camera();
 
 	dev_info(&icd->dev,
 		 "SuperH Mobile CEU driver detached from camera %d\n",

include/media/sh_mobile_ceu.h

@@ -5,8 +5,6 @@
 
 struct sh_mobile_ceu_info {
 	unsigned long flags; /* SOCAM_... */
-	void (*enable_camera)(void);
-	void (*disable_camera)(void);
 };
 
 #endif /* __ASM_SH_MOBILE_CEU_H__ */

include/media/soc_camera.h

@@ -83,6 +83,9 @@ struct soc_camera_link {
 	int bus_id;
 	/* GPIO number to switch between 8 and 10 bit modes */
 	unsigned int gpio;
+	/* Optional callbacks to power on or off and reset the sensor */
+	int (*power)(struct device *, int);
+	int (*reset)(struct device *);
 };
 
 static inline struct soc_camera_device *to_soc_camera_dev(struct device *dev)