diff options
Diffstat (limited to 'drivers/media/platform/soc_camera_platform.c')
| -rw-r--r-- | drivers/media/platform/soc_camera_platform.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/drivers/media/platform/soc_camera_platform.c b/drivers/media/platform/soc_camera_platform.c new file mode 100644 index 000000000000..f59ccade07c8 --- /dev/null +++ b/drivers/media/platform/soc_camera_platform.c @@ -0,0 +1,197 @@ +/* + * 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 struct v4l2_subdev_core_ops platform_subdev_core_ops; + +static int soc_camera_platform_enum_fmt(struct v4l2_subdev *sd, unsigned int index, + enum v4l2_mbus_pixelcode *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; + int ret; + + if (!p) + return -EINVAL; + + if (!p->icd) { + dev_err(&pdev->dev, + "Platform has not set soc_camera_device pointer!\n"); + return -EINVAL; + } + + priv = kzalloc(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); + + ret = v4l2_device_register_subdev(&ici->v4l2_dev, &priv->subdev); + if (ret) + goto evdrs; + + return ret; + +evdrs: + platform_set_drvdata(pdev, NULL); + kfree(priv); + return ret; +} + +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); + platform_set_drvdata(pdev, NULL); + kfree(priv); + return 0; +} + +static struct platform_driver soc_camera_platform_driver = { + .driver = { + .name = "soc_camera_platform", + .owner = THIS_MODULE, + }, + .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"); |