diff options
Diffstat (limited to 'drivers/media/platform/soc_camera/soc_camera.c')
| -rw-r--r-- | drivers/media/platform/soc_camera/soc_camera.c | 1605 |
1 files changed, 1605 insertions, 0 deletions
diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c new file mode 100644 index 000000000000..3be92944f8e7 --- /dev/null +++ b/drivers/media/platform/soc_camera/soc_camera.c @@ -0,0 +1,1605 @@ +/* + * camera image capture (abstract) bus driver + * + * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> + * + * This driver provides an interface between platform-specific camera + * busses and camera devices. It should be used if the camera is + * connected not over a "proper" bus like PCI or USB, but over a + * special bus, like, for example, the Quick Capture interface on PXA270 + * SoCs. Later it should also be used for i.MX31 SoCs from Freescale. + * It can handle multiple cameras and / or multiple busses, which can + * be used, e.g., in stereo-vision applications. + * + * 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/device.h> +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <linux/pm_runtime.h> +#include <linux/vmalloc.h> + +#include <media/soc_camera.h> +#include <media/v4l2-common.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-dev.h> +#include <media/videobuf-core.h> +#include <media/videobuf2-core.h> +#include <media/soc_mediabus.h> + +/* Default to VGA resolution */ +#define DEFAULT_WIDTH 640 +#define DEFAULT_HEIGHT 480 + +#define is_streaming(ici, icd) \ + (((ici)->ops->init_videobuf) ? \ + (icd)->vb_vidq.streaming : \ + vb2_is_streaming(&(icd)->vb2_vidq)) + +static LIST_HEAD(hosts); +static LIST_HEAD(devices); +static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */ + +int soc_camera_power_on(struct device *dev, struct soc_camera_link *icl) +{ + int ret = regulator_bulk_enable(icl->num_regulators, + icl->regulators); + if (ret < 0) { + dev_err(dev, "Cannot enable regulators\n"); + return ret; + } + + if (icl->power) { + ret = icl->power(dev, 1); + if (ret < 0) { + dev_err(dev, + "Platform failed to power-on the camera.\n"); + regulator_bulk_disable(icl->num_regulators, + icl->regulators); + } + } + + return ret; +} +EXPORT_SYMBOL(soc_camera_power_on); + +int soc_camera_power_off(struct device *dev, struct soc_camera_link *icl) +{ + int ret = 0; + int err; + + if (icl->power) { + err = icl->power(dev, 0); + if (err < 0) { + dev_err(dev, + "Platform failed to power-off the camera.\n"); + ret = err; + } + } + + err = regulator_bulk_disable(icl->num_regulators, + icl->regulators); + if (err < 0) { + dev_err(dev, "Cannot disable regulators\n"); + ret = ret ? : err; + } + + return ret; +} +EXPORT_SYMBOL(soc_camera_power_off); + +static int __soc_camera_power_on(struct soc_camera_device *icd) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + int ret; + + ret = v4l2_subdev_call(sd, core, s_power, 1); + if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) + return ret; + + return 0; +} + +static int __soc_camera_power_off(struct soc_camera_device *icd) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + int ret; + + ret = v4l2_subdev_call(sd, core, s_power, 0); + if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) + return ret; + + return 0; +} + +const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( + struct soc_camera_device *icd, unsigned int fourcc) +{ + unsigned int i; + + for (i = 0; i < icd->num_user_formats; i++) + if (icd->user_formats[i].host_fmt->fourcc == fourcc) + return icd->user_formats + i; + return NULL; +} +EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); + +/** + * soc_camera_apply_board_flags() - apply platform SOCAM_SENSOR_INVERT_* flags + * @icl: camera platform parameters + * @cfg: media bus configuration + * @return: resulting flags + */ +unsigned long soc_camera_apply_board_flags(struct soc_camera_link *icl, + const struct v4l2_mbus_config *cfg) +{ + unsigned long f, flags = cfg->flags; + + /* If only one of the two polarities is supported, switch to the opposite */ + if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) { + f = flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW); + if (f == V4L2_MBUS_HSYNC_ACTIVE_HIGH || f == V4L2_MBUS_HSYNC_ACTIVE_LOW) + flags ^= V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW; + } + + if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) { + f = flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW); + if (f == V4L2_MBUS_VSYNC_ACTIVE_HIGH || f == V4L2_MBUS_VSYNC_ACTIVE_LOW) + flags ^= V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW; + } + + if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) { + f = flags & (V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING); + if (f == V4L2_MBUS_PCLK_SAMPLE_RISING || f == V4L2_MBUS_PCLK_SAMPLE_FALLING) + flags ^= V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING; + } + + return flags; +} +EXPORT_SYMBOL(soc_camera_apply_board_flags); + +#define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ + ((x) >> 24) & 0xff + +static int soc_camera_try_fmt(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + const struct soc_camera_format_xlate *xlate; + struct v4l2_pix_format *pix = &f->fmt.pix; + int ret; + + dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n", + pixfmtstr(pix->pixelformat), pix->width, pix->height); + + if (pix->pixelformat != V4L2_PIX_FMT_JPEG && + !(ici->capabilities & SOCAM_HOST_CAP_STRIDE)) { + pix->bytesperline = 0; + pix->sizeimage = 0; + } + + ret = ici->ops->try_fmt(icd, f); + if (ret < 0) + return ret; + + xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); + if (!xlate) + return -EINVAL; + + ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt); + if (ret < 0) + return ret; + + pix->bytesperline = max_t(u32, pix->bytesperline, ret); + + ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline, + pix->height); + if (ret < 0) + return ret; + + pix->sizeimage = max_t(u32, pix->sizeimage, ret); + + return 0; +} + +static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct soc_camera_device *icd = file->private_data; + + WARN_ON(priv != file->private_data); + + /* Only single-plane capture is supported so far */ + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + /* limit format to hardware capabilities */ + return soc_camera_try_fmt(icd, f); +} + +static int soc_camera_enum_input(struct file *file, void *priv, + struct v4l2_input *inp) +{ + if (inp->index != 0) + return -EINVAL; + + /* default is camera */ + inp->type = V4L2_INPUT_TYPE_CAMERA; + inp->std = V4L2_STD_UNKNOWN; + strcpy(inp->name, "Camera"); + + return 0; +} + +static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) +{ + *i = 0; + + return 0; +} + +static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) +{ + if (i > 0) + return -EINVAL; + + return 0; +} + +static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a) +{ + struct soc_camera_device *icd = file->private_data; + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + + return v4l2_subdev_call(sd, core, s_std, *a); +} + +static int soc_camera_g_std(struct file *file, void *priv, v4l2_std_id *a) +{ + struct soc_camera_device *icd = file->private_data; + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + + return v4l2_subdev_call(sd, core, g_std, a); +} + +static int soc_camera_enum_framesizes(struct file *file, void *fh, + struct v4l2_frmsizeenum *fsize) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + return ici->ops->enum_framesizes(icd, fsize); +} + +static int soc_camera_reqbufs(struct file *file, void *priv, + struct v4l2_requestbuffers *p) +{ + int ret; + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + WARN_ON(priv != file->private_data); + + if (icd->streamer && icd->streamer != file) + return -EBUSY; + + if (ici->ops->init_videobuf) { + ret = videobuf_reqbufs(&icd->vb_vidq, p); + if (ret < 0) + return ret; + + ret = ici->ops->reqbufs(icd, p); + } else { + ret = vb2_reqbufs(&icd->vb2_vidq, p); + } + + if (!ret && !icd->streamer) + icd->streamer = file; + + return ret; +} + +static int soc_camera_querybuf(struct file *file, void *priv, + struct v4l2_buffer *p) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + WARN_ON(priv != file->private_data); + + if (ici->ops->init_videobuf) + return videobuf_querybuf(&icd->vb_vidq, p); + else + return vb2_querybuf(&icd->vb2_vidq, p); +} + +static int soc_camera_qbuf(struct file *file, void *priv, + struct v4l2_buffer *p) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + WARN_ON(priv != file->private_data); + + if (icd->streamer != file) + return -EBUSY; + + if (ici->ops->init_videobuf) + return videobuf_qbuf(&icd->vb_vidq, p); + else + return vb2_qbuf(&icd->vb2_vidq, p); +} + +static int soc_camera_dqbuf(struct file *file, void *priv, + struct v4l2_buffer *p) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + WARN_ON(priv != file->private_data); + + if (icd->streamer != file) + return -EBUSY; + + if (ici->ops->init_videobuf) + return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK); + else + return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK); +} + +static int soc_camera_create_bufs(struct file *file, void *priv, + struct v4l2_create_buffers *create) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + /* videobuf2 only */ + if (ici->ops->init_videobuf) + return -EINVAL; + else + return vb2_create_bufs(&icd->vb2_vidq, create); +} + +static int soc_camera_prepare_buf(struct file *file, void *priv, + struct v4l2_buffer *b) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + /* videobuf2 only */ + if (ici->ops->init_videobuf) + return -EINVAL; + else + return vb2_prepare_buf(&icd->vb2_vidq, b); +} + +/* Always entered with .video_lock held */ +static int soc_camera_init_user_formats(struct soc_camera_device *icd) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + unsigned int i, fmts = 0, raw_fmts = 0; + int ret; + enum v4l2_mbus_pixelcode code; + + while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code)) + raw_fmts++; + + if (!ici->ops->get_formats) + /* + * Fallback mode - the host will have to serve all + * sensor-provided formats one-to-one to the user + */ + fmts = raw_fmts; + else + /* + * First pass - only count formats this host-sensor + * configuration can provide + */ + for (i = 0; i < raw_fmts; i++) { + ret = ici->ops->get_formats(icd, i, NULL); + if (ret < 0) + return ret; + fmts += ret; + } + + if (!fmts) + return -ENXIO; + + icd->user_formats = + vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); + if (!icd->user_formats) + return -ENOMEM; + + dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts); + + /* Second pass - actually fill data formats */ + fmts = 0; + for (i = 0; i < raw_fmts; i++) + if (!ici->ops->get_formats) { + v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code); + icd->user_formats[fmts].host_fmt = + soc_mbus_get_fmtdesc(code); + if (icd->user_formats[fmts].host_fmt) + icd->user_formats[fmts++].code = code; + } else { + ret = ici->ops->get_formats(icd, i, + &icd->user_formats[fmts]); + if (ret < 0) + goto egfmt; + fmts += ret; + } + + icd->num_user_formats = fmts; + icd->current_fmt = &icd->user_formats[0]; + + return 0; + +egfmt: + vfree(icd->user_formats); + return ret; +} + +/* Always entered with .video_lock held */ +static void soc_camera_free_user_formats(struct soc_camera_device *icd) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + if (ici->ops->put_formats) + ici->ops->put_formats(icd); + icd->current_fmt = NULL; + icd->num_user_formats = 0; + vfree(icd->user_formats); + icd->user_formats = NULL; +} + +/* Called with .vb_lock held, or from the first open(2), see comment there */ +static int soc_camera_set_fmt(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct v4l2_pix_format *pix = &f->fmt.pix; + int ret; + + dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n", + pixfmtstr(pix->pixelformat), pix->width, pix->height); + + /* We always call try_fmt() before set_fmt() or set_crop() */ + ret = soc_camera_try_fmt(icd, f); + if (ret < 0) + return ret; + + ret = ici->ops->set_fmt(icd, f); + if (ret < 0) { + return ret; + } else if (!icd->current_fmt || + icd->current_fmt->host_fmt->fourcc != pix->pixelformat) { + dev_err(icd->pdev, + "Host driver hasn't set up current format correctly!\n"); + return -EINVAL; + } + + icd->user_width = pix->width; + icd->user_height = pix->height; + icd->bytesperline = pix->bytesperline; + icd->sizeimage = pix->sizeimage; + icd->colorspace = pix->colorspace; + icd->field = pix->field; + if (ici->ops->init_videobuf) + icd->vb_vidq.field = pix->field; + + dev_dbg(icd->pdev, "set width: %d height: %d\n", + icd->user_width, icd->user_height); + + /* set physical bus parameters */ + return ici->ops->set_bus_param(icd); +} + +static int soc_camera_open(struct file *file) +{ + struct video_device *vdev = video_devdata(file); + struct soc_camera_device *icd = dev_get_drvdata(vdev->parent); + struct soc_camera_link *icl = to_soc_camera_link(icd); + struct soc_camera_host *ici; + int ret; + + if (!to_soc_camera_control(icd)) + /* No device driver attached */ + return -ENODEV; + + ici = to_soc_camera_host(icd->parent); + + if (mutex_lock_interruptible(&icd->video_lock)) + return -ERESTARTSYS; + if (!try_module_get(ici->ops->owner)) { + dev_err(icd->pdev, "Couldn't lock capture bus driver.\n"); + ret = -EINVAL; + goto emodule; + } + + icd->use_count++; + + /* Now we really have to activate the camera */ + if (icd->use_count == 1) { + /* Restore parameters before the last close() per V4L2 API */ + struct v4l2_format f = { + .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, + .fmt.pix = { + .width = icd->user_width, + .height = icd->user_height, + .field = icd->field, + .colorspace = icd->colorspace, + .pixelformat = + icd->current_fmt->host_fmt->fourcc, + }, + }; + + /* The camera could have been already on, try to reset */ + if (icl->reset) + icl->reset(icd->pdev); + + /* Don't mess with the host during probe */ + mutex_lock(&ici->host_lock); + ret = ici->ops->add(icd); + mutex_unlock(&ici->host_lock); + if (ret < 0) { + dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); + goto eiciadd; + } + + ret = __soc_camera_power_on(icd); + if (ret < 0) + goto epower; + + pm_runtime_enable(&icd->vdev->dev); + ret = pm_runtime_resume(&icd->vdev->dev); + if (ret < 0 && ret != -ENOSYS) + goto eresume; + + /* + * Try to configure with default parameters. Notice: this is the + * very first open, so, we cannot race against other calls, + * apart from someone else calling open() simultaneously, but + * .video_lock is protecting us against it. + */ + ret = soc_camera_set_fmt(icd, &f); + if (ret < 0) + goto esfmt; + + if (ici->ops->init_videobuf) { + ici->ops->init_videobuf(&icd->vb_vidq, icd); + } else { + ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd); + if (ret < 0) + goto einitvb; + } + v4l2_ctrl_handler_setup(&icd->ctrl_handler); + } + mutex_unlock(&icd->video_lock); + + file->private_data = icd; + dev_dbg(icd->pdev, "camera device open\n"); + + return 0; + + /* + * First four errors are entered with the .video_lock held + * and use_count == 1 + */ +einitvb: +esfmt: + pm_runtime_disable(&icd->vdev->dev); +eresume: + __soc_camera_power_off(icd); +epower: + ici->ops->remove(icd); +eiciadd: + icd->use_count--; + module_put(ici->ops->owner); +emodule: + mutex_unlock(&icd->video_lock); + + return ret; +} + +static int soc_camera_close(struct file *file) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + mutex_lock(&icd->video_lock); + icd->use_count--; + if (!icd->use_count) { + pm_runtime_suspend(&icd->vdev->dev); + pm_runtime_disable(&icd->vdev->dev); + + if (ici->ops->init_videobuf2) + vb2_queue_release(&icd->vb2_vidq); + ici->ops->remove(icd); + + __soc_camera_power_off(icd); + } + + if (icd->streamer == file) + icd->streamer = NULL; + mutex_unlock(&icd->video_lock); + + module_put(ici->ops->owner); + + dev_dbg(icd->pdev, "camera device close\n"); + + return 0; +} + +static ssize_t soc_camera_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + struct soc_camera_device *icd = file->private_data; + int err = -EINVAL; + + dev_err(icd->pdev, "camera device read not implemented\n"); + + return err; +} + +static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + int err; + + dev_dbg(icd->pdev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); + + if (icd->streamer != file) + return -EBUSY; + + if (mutex_lock_interruptible(&icd->video_lock)) + return -ERESTARTSYS; + if (ici->ops->init_videobuf) + err = videobuf_mmap_mapper(&icd->vb_vidq, vma); + else + err = vb2_mmap(&icd->vb2_vidq, vma); + mutex_unlock(&icd->video_lock); + + dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n", + (unsigned long)vma->vm_start, + (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, + err); + + return err; +} + +static unsigned int soc_camera_poll(struct file *file, poll_table *pt) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + unsigned res = POLLERR; + + if (icd->streamer != file) + return POLLERR; + + mutex_lock(&icd->video_lock); + if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) + dev_err(icd->pdev, "Trying to poll with no queued buffers!\n"); + else + res = ici->ops->poll(file, pt); + mutex_unlock(&icd->video_lock); + return res; +} + +void soc_camera_lock(struct vb2_queue *vq) +{ + struct soc_camera_device *icd = vb2_get_drv_priv(vq); + mutex_lock(&icd->video_lock); +} +EXPORT_SYMBOL(soc_camera_lock); + +void soc_camera_unlock(struct vb2_queue *vq) +{ + struct soc_camera_device *icd = vb2_get_drv_priv(vq); + mutex_unlock(&icd->video_lock); +} +EXPORT_SYMBOL(soc_camera_unlock); + +static struct v4l2_file_operations soc_camera_fops = { + .owner = THIS_MODULE, + .open = soc_camera_open, + .release = soc_camera_close, + .unlocked_ioctl = video_ioctl2, + .read = soc_camera_read, + .mmap = soc_camera_mmap, + .poll = soc_camera_poll, +}; + +static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct soc_camera_device *icd = file->private_data; + int ret; + + WARN_ON(priv != file->private_data); + + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type); + return -EINVAL; + } + + if (icd->streamer && icd->streamer != file) + return -EBUSY; + + if (is_streaming(to_soc_camera_host(icd->parent), icd)) { + dev_err(icd->pdev, "S_FMT denied: queue initialised\n"); + return -EBUSY; + } + + ret = soc_camera_set_fmt(icd, f); + + if (!ret && !icd->streamer) + icd->streamer = file; + + return ret; +} + +static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + struct soc_camera_device *icd = file->private_data; + const struct soc_mbus_pixelfmt *format; + + WARN_ON(priv != file->private_data); + + if (f->index >= icd->num_user_formats) + return -EINVAL; + + format = icd->user_formats[f->index].host_fmt; + + if (format->name) + strlcpy(f->description, format->name, sizeof(f->description)); + f->pixelformat = format->fourcc; + return 0; +} + +static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct soc_camera_device *icd = file->private_data; + struct v4l2_pix_format *pix = &f->fmt.pix; + + WARN_ON(priv != file->private_data); + + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + pix->width = icd->user_width; + pix->height = icd->user_height; + pix->bytesperline = icd->bytesperline; + pix->sizeimage = icd->sizeimage; + pix->field = icd->field; + pix->pixelformat = icd->current_fmt->host_fmt->fourcc; + pix->colorspace = icd->colorspace; + dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n", + icd->current_fmt->host_fmt->fourcc); + return 0; +} + +static int soc_camera_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + WARN_ON(priv != file->private_data); + + strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); + return ici->ops->querycap(ici, cap); +} + +static int soc_camera_streamon(struct file *file, void *priv, + enum v4l2_buf_type i) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + int ret; + + WARN_ON(priv != file->private_data); + + if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (icd->streamer != file) + return -EBUSY; + + /* This calls buf_queue from host driver's videobuf_queue_ops */ + if (ici->ops->init_videobuf) + ret = videobuf_streamon(&icd->vb_vidq); + else + ret = vb2_streamon(&icd->vb2_vidq, i); + + if (!ret) + v4l2_subdev_call(sd, video, s_stream, 1); + + return ret; +} + +static int soc_camera_streamoff(struct file *file, void *priv, + enum v4l2_buf_type i) +{ + struct soc_camera_device *icd = file->private_data; + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + WARN_ON(priv != file->private_data); + + if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (icd->streamer != file) + return -EBUSY; + + /* + * This calls buf_release from host driver's videobuf_queue_ops for all + * remaining buffers. When the last buffer is freed, stop capture + */ + if (ici->ops->init_videobuf) + videobuf_streamoff(&icd->vb_vidq); + else + vb2_streamoff(&icd->vb2_vidq, i); + + v4l2_subdev_call(sd, video, s_stream, 0); + + return 0; +} + +static int soc_camera_cropcap(struct file *file, void *fh, + struct v4l2_cropcap *a) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + return ici->ops->cropcap(icd, a); +} + +static int soc_camera_g_crop(struct file *file, void *fh, + struct v4l2_crop *a) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + int ret; + + ret = ici->ops->get_crop(icd, a); + + return ret; +} + +/* + * According to the V4L2 API, drivers shall not update the struct v4l2_crop + * argument with the actual geometry, instead, the user shall use G_CROP to + * retrieve it. + */ +static int soc_camera_s_crop(struct file *file, void *fh, + const struct v4l2_crop *a) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + const struct v4l2_rect *rect = &a->c; + struct v4l2_crop current_crop; + int ret; + + if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + dev_dbg(icd->pdev, "S_CROP(%ux%u@%u:%u)\n", + rect->width, rect->height, rect->left, rect->top); + + /* If get_crop fails, we'll let host and / or client drivers decide */ + ret = ici->ops->get_crop(icd, ¤t_crop); + + /* Prohibit window size change with initialised buffers */ + if (ret < 0) { + dev_err(icd->pdev, + "S_CROP denied: getting current crop failed\n"); + } else if ((a->c.width == current_crop.c.width && + a->c.height == current_crop.c.height) || + !is_streaming(ici, icd)) { + /* same size or not streaming - use .set_crop() */ + ret = ici->ops->set_crop(icd, a); + } else if (ici->ops->set_livecrop) { + ret = ici->ops->set_livecrop(icd, a); + } else { + dev_err(icd->pdev, + "S_CROP denied: queue initialised and sizes differ\n"); + ret = -EBUSY; + } + + return ret; +} + +static int soc_camera_g_selection(struct file *file, void *fh, + struct v4l2_selection *s) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + /* With a wrong type no need to try to fall back to cropping */ + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (!ici->ops->get_selection) + return -ENOTTY; + + return ici->ops->get_selection(icd, s); +} + +static int soc_camera_s_selection(struct file *file, void *fh, + struct v4l2_selection *s) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + int ret; + + /* In all these cases cropping emulation will not help */ + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + (s->target != V4L2_SEL_TGT_COMPOSE_ACTIVE && + s->target != V4L2_SEL_TGT_CROP_ACTIVE)) + return -EINVAL; + + if (s->target == V4L2_SEL_TGT_COMPOSE_ACTIVE) { + /* No output size change during a running capture! */ + if (is_streaming(ici, icd) && + (icd->user_width != s->r.width || + icd->user_height != s->r.height)) + return -EBUSY; + + /* + * Only one user is allowed to change the output format, touch + * buffers, start / stop streaming, poll for data + */ + if (icd->streamer && icd->streamer != file) + return -EBUSY; + } + + if (!ici->ops->set_selection) + return -ENOTTY; + + ret = ici->ops->set_selection(icd, s); + if (!ret && + s->target == V4L2_SEL_TGT_COMPOSE_ACTIVE) { + icd->user_width = s->r.width; + icd->user_height = s->r.height; + if (!icd->streamer) + icd->streamer = file; + } + + return ret; +} + +static int soc_camera_g_parm(struct file *file, void *fh, + struct v4l2_streamparm *a) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + if (ici->ops->get_parm) + return ici->ops->get_parm(icd, a); + + return -ENOIOCTLCMD; +} + +static int soc_camera_s_parm(struct file *file, void *fh, + struct v4l2_streamparm *a) +{ + struct soc_camera_device *icd = file->private_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + if (ici->ops->set_parm) + return ici->ops->set_parm(icd, a); + + return -ENOIOCTLCMD; +} + +static int soc_camera_g_chip_ident(struct file *file, void *fh, + struct v4l2_dbg_chip_ident *id) +{ + struct soc_camera_device *icd = file->private_data; + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + + return v4l2_subdev_call(sd, core, g_chip_ident, id); +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int soc_camera_g_register(struct file *file, void *fh, + struct v4l2_dbg_register *reg) +{ + struct soc_camera_device *icd = file->private_data; + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + + return v4l2_subdev_call(sd, core, g_register, reg); +} + +static int soc_camera_s_register(struct file *file, void *fh, + struct v4l2_dbg_register *reg) +{ + struct soc_camera_device *icd = file->private_data; + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + + return v4l2_subdev_call(sd, core, s_register, reg); +} +#endif + +static int soc_camera_probe(struct soc_camera_device *icd); + +/* So far this function cannot fail */ +static void scan_add_host(struct soc_camera_host *ici) +{ + struct soc_camera_device *icd; + + mutex_lock(&ici->host_lock); + + list_for_each_entry(icd, &devices, list) { + if (icd->iface == ici->nr) { + int ret; + + icd->parent = ici->v4l2_dev.dev; + ret = soc_camera_probe(icd); + } + } + + mutex_unlock(&ici->host_lock); +} + +#ifdef CONFIG_I2C_BOARDINFO +static int soc_camera_init_i2c(struct soc_camera_device *icd, + struct soc_camera_link *icl) +{ + struct i2c_client *client; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id); + struct v4l2_subdev *subdev; + + if (!adap) { + dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n", + icl->i2c_adapter_id); + goto ei2cga; + } + + icl->board_info->platform_data = icl; + + subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, + icl->board_info, NULL); + if (!subdev) + goto ei2cnd; + + client = v4l2_get_subdevdata(subdev); + + /* Use to_i2c_client(dev) to recover the i2c client */ + icd->control = &client->dev; + + return 0; +ei2cnd: + i2c_put_adapter(adap); +ei2cga: + return -ENODEV; +} + +static void soc_camera_free_i2c(struct soc_camera_device *icd) +{ + struct i2c_client *client = + to_i2c_client(to_soc_camera_control(icd)); + struct i2c_adapter *adap = client->adapter; + + icd->control = NULL; + v4l2_device_unregister_subdev(i2c_get_clientdata(client)); + i2c_unregister_device(client); + i2c_put_adapter(adap); +} +#else +#define soc_camera_init_i2c(icd, icl) (-ENODEV) +#define soc_camera_free_i2c(icd) do {} while (0) +#endif + +static int soc_camera_video_start(struct soc_camera_device *icd); +static int video_dev_create(struct soc_camera_device *icd); +/* Called during host-driver probe */ +static int soc_camera_probe(struct soc_camera_device *icd) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct soc_camera_link *icl = to_soc_camera_link(icd); + struct device *control = NULL; + struct v4l2_subdev *sd; + struct v4l2_mbus_framefmt mf; + int ret; + + dev_info(icd->pdev, "Probing %s\n", dev_name(icd->pdev)); + + /* + * Currently the subdev with the largest number of controls (13) is + * ov6550. So let's pick 16 as a hint for the control handler. Note + * that this is a hint only: too large and you waste some memory, too + * small and there is a (very) small performance hit when looking up + * controls in the internal hash. + */ + ret = v4l2_ctrl_handler_init(&icd->ctrl_handler, 16); + if (ret < 0) + return ret; + + ret = regulator_bulk_get(icd->pdev, icl->num_regulators, + icl->regulators); + if (ret < 0) + goto ereg; + + /* The camera could have been already on, try to reset */ + if (icl->reset) + icl->reset(icd->pdev); + + ret = ici->ops->add(icd); + if (ret < 0) + goto eadd; + + /* Must have icd->vdev before registering the device */ + ret = video_dev_create(icd); + if (ret < 0) + goto evdc; + + /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ + if (icl->board_info) { + ret = soc_camera_init_i2c(icd, icl); + if (ret < 0) + goto eadddev; + } else if (!icl->add_device || !icl->del_device) { + ret = -EINVAL; + goto eadddev; + } else { + if (icl->module_name) + ret = request_module(icl->module_name); + + ret = icl->add_device(icd); + if (ret < 0) + goto eadddev; + + /* + * FIXME: this is racy, have to use driver-binding notification, + * when it is available + */ + control = to_soc_camera_control(icd); + if (!control || !control->driver || !dev_get_drvdata(control) || + !try_module_get(control->driver->owner)) { + icl->del_device(icd); + ret = -ENODEV; + goto enodrv; + } + } + + sd = soc_camera_to_subdev(icd); + sd->grp_id = soc_camera_grp_id(icd); + v4l2_set_subdev_hostdata(sd, icd); + + if (v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler, NULL)) + goto ectrl; + + /* At this point client .probe() should have run already */ + ret = soc_camera_init_user_formats(icd); + if (ret < 0) + goto eiufmt; + + icd->field = V4L2_FIELD_ANY; + + /* + * ..._video_start() will create a device node, video_register_device() + * itself is protected against concurrent open() calls, but we also have + * to protect our data. + */ + mutex_lock(&icd->video_lock); + + ret = soc_camera_video_start(icd); + if (ret < 0) + goto evidstart; + + /* Try to improve our guess of a reasonable window format */ + if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) { + icd->user_width = mf.width; + icd->user_height = mf.height; + icd->colorspace = mf.colorspace; + icd->field = mf.field; + } + + ici->ops->remove(icd); + + mutex_unlock(&icd->video_lock); + + return 0; + +evidstart: + mutex_unlock(&icd->video_lock); + soc_camera_free_user_formats(icd); +eiufmt: +ectrl: + if (icl->board_info) { + soc_camera_free_i2c(icd); + } else { + icl->del_device(icd); + module_put(control->driver->owner); + } +enodrv: +eadddev: + video_device_release(icd->vdev); + icd->vdev = NULL; +evdc: + ici->ops->remove(icd); +eadd: + regulator_bulk_free(icl->num_regulators, icl->regulators); +ereg: + v4l2_ctrl_handler_free(&icd->ctrl_handler); + return ret; +} + +/* + * This is called on device_unregister, which only means we have to disconnect + * from the host, but not remove ourselves from the device list + */ +static int soc_camera_remove(struct soc_camera_device *icd) +{ + struct soc_camera_link *icl = to_soc_camera_link(icd); + struct video_device *vdev = icd->vdev; + + BUG_ON(!icd->parent); + + v4l2_ctrl_handler_free(&icd->ctrl_handler); + if (vdev) { + video_unregister_device(vdev); + icd->vdev = NULL; + } + + if (icl->board_info) { + soc_camera_free_i2c(icd); + } else { + struct device_driver *drv = to_soc_camera_control(icd)->driver; + if (drv) { + icl->del_device(icd); + module_put(drv->owner); + } + } + soc_camera_free_user_formats(icd); + + regulator_bulk_free(icl->num_regulators, icl->regulators); + + return 0; +} + +static int default_cropcap(struct soc_camera_device *icd, + struct v4l2_cropcap *a) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + return v4l2_subdev_call(sd, video, cropcap, a); +} + +static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + return v4l2_subdev_call(sd, video, g_crop, a); +} + +static int default_s_crop(struct soc_camera_device *icd, const struct v4l2_crop *a) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + return v4l2_subdev_call(sd, video, s_crop, a); +} + +static int default_g_parm(struct soc_camera_device *icd, + struct v4l2_streamparm *parm) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + return v4l2_subdev_call(sd, video, g_parm, parm); +} + +static int default_s_parm(struct soc_camera_device *icd, + struct v4l2_streamparm *parm) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + return v4l2_subdev_call(sd, video, s_parm, parm); +} + +static int default_enum_framesizes(struct soc_camera_device *icd, + struct v4l2_frmsizeenum *fsize) +{ + int ret; + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + const struct soc_camera_format_xlate *xlate; + __u32 pixfmt = fsize->pixel_format; + struct v4l2_frmsizeenum fsize_mbus = *fsize; + + xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); + if (!xlate) + return -EINVAL; + /* map xlate-code to pixel_format, sensor only handle xlate-code*/ + fsize_mbus.pixel_format = xlate->code; + + ret = v4l2_subdev_call(sd, video, enum_framesizes, &fsize_mbus); + if (ret < 0) + return ret; + + *fsize = fsize_mbus; + fsize->pixel_format = pixfmt; + + return 0; +} + +int soc_camera_host_register(struct soc_camera_host *ici) +{ + struct soc_camera_host *ix; + int ret; + + if (!ici || !ici->ops || + !ici->ops->try_fmt || + !ici->ops->set_fmt || + !ici->ops->set_bus_param || + !ici->ops->querycap || + ((!ici->ops->init_videobuf || + !ici->ops->reqbufs) && + !ici->ops->init_videobuf2) || + !ici->ops->add || + !ici->ops->remove || + !ici->ops->poll || + !ici->v4l2_dev.dev) + return -EINVAL; + + if (!ici->ops->set_crop) + ici->ops->set_crop = default_s_crop; + if (!ici->ops->get_crop) + ici->ops->get_crop = default_g_crop; + if (!ici->ops->cropcap) + ici->ops->cropcap = default_cropcap; + if (!ici->ops->set_parm) + ici->ops->set_parm = default_s_parm; + if (!ici->ops->get_parm) + ici->ops->get_parm = default_g_parm; + if (!ici->ops->enum_framesizes) + ici->ops->enum_framesizes = default_enum_framesizes; + + mutex_lock(&list_lock); + list_for_each_entry(ix, &hosts, list) { + if (ix->nr == ici->nr) { + ret = -EBUSY; + goto edevreg; + } + } + + ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); + if (ret < 0) + goto edevreg; + + list_add_tail(&ici->list, &hosts); + mutex_unlock(&list_lock); + + mutex_init(&ici->host_lock); + scan_add_host(ici); + + return 0; + +edevreg: + mutex_unlock(&list_lock); + return ret; +} +EXPORT_SYMBOL(soc_camera_host_register); + +/* Unregister all clients! */ +void soc_camera_host_unregister(struct soc_camera_host *ici) +{ + struct soc_camera_device *icd; + + mutex_lock(&list_lock); + + list_del(&ici->list); + list_for_each_entry(icd, &devices, list) + if (icd->iface == ici->nr && to_soc_camera_control(icd)) + soc_camera_remove(icd); + + mutex_unlock(&list_lock); + + v4l2_device_unregister(&ici->v4l2_dev); +} +EXPORT_SYMBOL(soc_camera_host_unregister); + +/* Image capture device */ +static int soc_camera_device_register(struct soc_camera_device *icd) +{ + struct soc_camera_device *ix; + int num = -1, i; + + for (i = 0; i < 256 && num < 0; i++) { + num = i; + /* Check if this index is available on this interface */ + list_for_each_entry(ix, &devices, list) { + if (ix->iface == icd->iface && ix->devnum == i) { + num = -1; + break; + } + } + } + + if (num < 0) + /* + * ok, we have 256 cameras on this host... + * man, stay reasonable... + */ + return -ENOMEM; + + icd->devnum = num; + icd->use_count = 0; + icd->host_priv = NULL; + mutex_init(&icd->video_lock); + + list_add_tail(&icd->list, &devices); + + return 0; +} + +static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { + .vidioc_querycap = soc_camera_querycap, + .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, + .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, + .vidioc_enum_input = soc_camera_enum_input, + .vidioc_g_input = soc_camera_g_input, + .vidioc_s_input = soc_camera_s_input, + .vidioc_s_std = soc_camera_s_std, + .vidioc_g_std = soc_camera_g_std, + .vidioc_enum_framesizes = soc_camera_enum_framesizes, + .vidioc_reqbufs = soc_camera_reqbufs, + .vidioc_querybuf = soc_camera_querybuf, + .vidioc_qbuf = soc_camera_qbuf, + .vidioc_dqbuf = soc_camera_dqbuf, + .vidioc_create_bufs = soc_camera_create_bufs, + .vidioc_prepare_buf = soc_camera_prepare_buf, + .vidioc_streamon = soc_camera_streamon, + .vidioc_streamoff = soc_camera_streamoff, + .vidioc_cropcap = soc_camera_cropcap, + .vidioc_g_crop = soc_camera_g_crop, + .vidioc_s_crop = soc_camera_s_crop, + .vidioc_g_selection = soc_camera_g_selection, + .vidioc_s_selection = soc_camera_s_selection, + .vidioc_g_parm = soc_camera_g_parm, + .vidioc_s_parm = soc_camera_s_parm, + .vidioc_g_chip_ident = soc_camera_g_chip_ident, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .vidioc_g_register = soc_camera_g_register, + .vidioc_s_register = soc_camera_s_register, +#endif +}; + +static int video_dev_create(struct soc_camera_device *icd) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct video_device *vdev = video_device_alloc(); + + if (!vdev) + return -ENOMEM; + + strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); + + vdev->parent = icd->pdev; + vdev->current_norm = V4L2_STD_UNKNOWN; + vdev->fops = &soc_camera_fops; + vdev->ioctl_ops = &soc_camera_ioctl_ops; + vdev->release = video_device_release; + vdev->tvnorms = V4L2_STD_UNKNOWN; + vdev->ctrl_handler = &icd->ctrl_handler; + vdev->lock = &icd->video_lock; + + icd->vdev = vdev; + + return 0; +} + +/* + * Called from soc_camera_probe() above (with .video_lock held???) + */ +static int soc_camera_video_start(struct soc_camera_device *icd) +{ + const struct device_type *type = icd->vdev->dev.type; + int ret; + + if (!icd->parent) + return -ENODEV; + + ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); + if (ret < 0) { + dev_err(icd->pdev, "video_register_device failed: %d\n", ret); + return ret; + } + + /* Restore device type, possibly set by the subdevice driver */ + icd->vdev->dev.type = type; + + return 0; +} + +static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev) +{ + struct soc_camera_link *icl = pdev->dev.platform_data; + struct soc_camera_device *icd; + int ret; + + if (!icl) + return -EINVAL; + + icd = kzalloc(sizeof(*icd), GFP_KERNEL); + if (!icd) + return -ENOMEM; + + icd->iface = icl->bus_id; + icd->link = icl; + icd->pdev = &pdev->dev; + platform_set_drvdata(pdev, icd); + + ret = soc_camera_device_register(icd); + if (ret < 0) + goto escdevreg; + + icd->user_width = DEFAULT_WIDTH; + icd->user_height = DEFAULT_HEIGHT; + + return 0; + +escdevreg: + kfree(icd); + + return ret; +} + +/* + * Only called on rmmod for each platform device, since they are not + * hot-pluggable. Now we know, that all our users - hosts and devices have + * been unloaded already + */ +static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev) +{ + struct soc_camera_device *icd = platform_get_drvdata(pdev); + + if (!icd) + return -EINVAL; + + list_del(&icd->list); + + kfree(icd); + + return 0; +} + +static struct platform_driver __refdata soc_camera_pdrv = { + .probe = soc_camera_pdrv_probe, + .remove = __devexit_p(soc_camera_pdrv_remove), + .driver = { + .name = "soc-camera-pdrv", + .owner = THIS_MODULE, + }, +}; + +static int __init soc_camera_init(void) +{ + return platform_driver_register(&soc_camera_pdrv); +} + +static void __exit soc_camera_exit(void) +{ + platform_driver_unregister(&soc_camera_pdrv); +} + +module_init(soc_camera_init); +module_exit(soc_camera_exit); + +MODULE_DESCRIPTION("Image capture bus driver"); +MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:soc-camera-pdrv"); |