--- /dev/null
+/*
+ * Generic Platform Camera Driver
+ *
+ * Copyright (C) 2008 Magnus Damm
+ * Based on mt9m001 driver,
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-subdev.h>
+#include <media/soc_camera.h>
+#include <media/soc_camera_platform.h>
+
+struct soc_camera_platform_priv {
+ struct v4l2_subdev subdev;
+};
+
+static struct soc_camera_platform_priv *get_priv(struct platform_device *pdev)
+{
+ struct v4l2_subdev *subdev = platform_get_drvdata(pdev);
+ return container_of(subdev, struct soc_camera_platform_priv, subdev);
+}
+
+static int soc_camera_platform_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
+ return p->set_capture(p, enable);
+}
+
+static int soc_camera_platform_fill_fmt(struct v4l2_subdev *sd,
+ struct v4l2_mbus_framefmt *mf)
+{
+ struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
+
+ mf->width = p->format.width;
+ mf->height = p->format.height;
+ mf->code = p->format.code;
+ mf->colorspace = p->format.colorspace;
+ mf->field = p->format.field;
+
+ return 0;
+}
+
+static int soc_camera_platform_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
+
+ return soc_camera_set_power(p->icd->control, &p->icd->sdesc->subdev_desc, NULL, on);
+}
+
+static struct v4l2_subdev_core_ops platform_subdev_core_ops = {
+ .s_power = soc_camera_platform_s_power,
+};
+
+static int soc_camera_platform_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
+ u32 *code)
+{
+ struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
+
+ if (index)
+ return -EINVAL;
+
+ *code = p->format.code;
+ return 0;
+}
+
+static int soc_camera_platform_g_crop(struct v4l2_subdev *sd,
+ struct v4l2_crop *a)
+{
+ struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
+
+ a->c.left = 0;
+ a->c.top = 0;
+ a->c.width = p->format.width;
+ a->c.height = p->format.height;
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ return 0;
+}
+
+static int soc_camera_platform_cropcap(struct v4l2_subdev *sd,
+ struct v4l2_cropcap *a)
+{
+ struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
+
+ a->bounds.left = 0;
+ a->bounds.top = 0;
+ a->bounds.width = p->format.width;
+ a->bounds.height = p->format.height;
+ a->defrect = a->bounds;
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ a->pixelaspect.numerator = 1;
+ a->pixelaspect.denominator = 1;
+
+ return 0;
+}
+
+static int soc_camera_platform_g_mbus_config(struct v4l2_subdev *sd,
+ struct v4l2_mbus_config *cfg)
+{
+ struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
+
+ cfg->flags = p->mbus_param;
+ cfg->type = p->mbus_type;
+
+ return 0;
+}
+
+static struct v4l2_subdev_video_ops platform_subdev_video_ops = {
+ .s_stream = soc_camera_platform_s_stream,
+ .enum_mbus_fmt = soc_camera_platform_enum_fmt,
+ .cropcap = soc_camera_platform_cropcap,
+ .g_crop = soc_camera_platform_g_crop,
+ .try_mbus_fmt = soc_camera_platform_fill_fmt,
+ .g_mbus_fmt = soc_camera_platform_fill_fmt,
+ .s_mbus_fmt = soc_camera_platform_fill_fmt,
+ .g_mbus_config = soc_camera_platform_g_mbus_config,
+};
+
+static struct v4l2_subdev_ops platform_subdev_ops = {
+ .core = &platform_subdev_core_ops,
+ .video = &platform_subdev_video_ops,
+};
+
+static int soc_camera_platform_probe(struct platform_device *pdev)
+{
+ struct soc_camera_host *ici;
+ struct soc_camera_platform_priv *priv;
+ struct soc_camera_platform_info *p = pdev->dev.platform_data;
+ struct soc_camera_device *icd;
+
+ if (!p)
+ return -EINVAL;
+
+ if (!p->icd) {
+ dev_err(&pdev->dev,
+ "Platform has not set soc_camera_device pointer!\n");
+ return -EINVAL;
+ }
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ icd = p->icd;
+
+ /* soc-camera convention: control's drvdata points to the subdev */
+ platform_set_drvdata(pdev, &priv->subdev);
+ /* Set the control device reference */
+ icd->control = &pdev->dev;
+
+ ici = to_soc_camera_host(icd->parent);
+
+ v4l2_subdev_init(&priv->subdev, &platform_subdev_ops);
+ v4l2_set_subdevdata(&priv->subdev, p);
+ strncpy(priv->subdev.name, dev_name(&pdev->dev), V4L2_SUBDEV_NAME_SIZE);
+
+ return v4l2_device_register_subdev(&ici->v4l2_dev, &priv->subdev);
+}
+
+static int soc_camera_platform_remove(struct platform_device *pdev)
+{
+ struct soc_camera_platform_priv *priv = get_priv(pdev);
+ struct soc_camera_platform_info *p = v4l2_get_subdevdata(&priv->subdev);
+
+ p->icd->control = NULL;
+ v4l2_device_unregister_subdev(&priv->subdev);
+ return 0;
+}
+
+static struct platform_driver soc_camera_platform_driver = {
+ .driver = {
+ .name = "soc_camera_platform",
+ },
+ .probe = soc_camera_platform_probe,
+ .remove = soc_camera_platform_remove,
+};
+
+module_platform_driver(soc_camera_platform_driver);
+
+MODULE_DESCRIPTION("SoC Camera Platform driver");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:soc_camera_platform");
Code Review / kvmfornfv.git / blobdiff