/* * 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 struct soc_camera_platform_info *get_info(struct soc_camera_device *icd) { struct platform_device *pdev = to_platform_device(to_soc_camera_control(icd)); return pdev->dev.platform_data; } 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_set_bus_param(struct soc_camera_device *icd, unsigned long flags) { return 0; } static unsigned long soc_camera_platform_query_bus_param(struct soc_camera_device *icd) { struct soc_camera_platform_info *p = get_info(icd); return p->bus_param; } 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 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, }; static struct v4l2_subdev_ops platform_subdev_ops = { .core = &platform_subdev_core_ops, .video = &platform_subdev_video_ops, }; static struct soc_camera_ops soc_camera_platform_ops = { .set_bus_param = soc_camera_platform_set_bus_param, .query_bus_param = soc_camera_platform_query_bus_param, }; 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->dev) { 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 = to_soc_camera_dev(p->dev); /* soc-camera convention: control's drvdata points to the subdev */ platform_set_drvdata(pdev, &priv->subdev); /* Set the control device reference */ dev_set_drvdata(&icd->dev, &pdev->dev); icd->ops = &soc_camera_platform_ops; ici = to_soc_camera_host(icd->dev.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: icd->ops = NULL; 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 = pdev->dev.platform_data; struct soc_camera_device *icd = to_soc_camera_dev(p->dev); v4l2_device_unregister_subdev(&priv->subdev); icd->ops = NULL; 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, }; static int __init soc_camera_platform_module_init(void) { return platform_driver_register(&soc_camera_platform_driver); } static void __exit soc_camera_platform_module_exit(void) { platform_driver_unregister(&soc_camera_platform_driver); } module_init(soc_camera_platform_module_init); module_exit(soc_camera_platform_module_exit); MODULE_DESCRIPTION("SoC Camera Platform driver"); MODULE_AUTHOR("Magnus Damm"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:soc_camera_platform");