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path: root/drivers/media/platform/soc_camera.c
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Diffstat (limited to 'drivers/media/platform/soc_camera.c')
-rw-r--r--drivers/media/platform/soc_camera.c1554
1 files changed, 1554 insertions, 0 deletions
diff --git a/drivers/media/platform/soc_camera.c b/drivers/media/platform/soc_camera.c
new file mode 100644
index 000000000000..9758217470f0
--- /dev/null
+++ b/drivers/media/platform/soc_camera.c
@@ -0,0 +1,1554 @@
+/*
+ * 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 */
+
+static int soc_camera_power_on(struct soc_camera_device *icd,
+ struct soc_camera_link *icl)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ int ret = regulator_bulk_enable(icl->num_regulators,
+ icl->regulators);
+ if (ret < 0) {
+ dev_err(icd->pdev, "Cannot enable regulators\n");
+ return ret;
+ }
+
+ if (icl->power) {
+ ret = icl->power(icd->control, 1);
+ if (ret < 0) {
+ dev_err(icd->pdev,
+ "Platform failed to power-on the camera.\n");
+ goto elinkpwr;
+ }
+ }
+
+ ret = v4l2_subdev_call(sd, core, s_power, 1);
+ if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
+ goto esdpwr;
+
+ return 0;
+
+esdpwr:
+ if (icl->power)
+ icl->power(icd->control, 0);
+elinkpwr:
+ regulator_bulk_disable(icl->num_regulators,
+ icl->regulators);
+ return ret;
+}
+
+static int soc_camera_power_off(struct soc_camera_device *icd,
+ struct soc_camera_link *icl)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ int ret = v4l2_subdev_call(sd, core, s_power, 0);
+
+ if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
+ return ret;
+
+ if (icl->power) {
+ ret = icl->power(icd->control, 0);
+ if (ret < 0) {
+ dev_err(icd->pdev,
+ "Platform failed to power-off the camera.\n");
+ return ret;
+ }
+ }
+
+ ret = regulator_bulk_disable(icl->num_regulators,
+ icl->regulators);
+ if (ret < 0)
+ dev_err(icd->pdev, "Cannot disable regulators\n");
+
+ return ret;
+}
+
+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 (!(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, icl);
+ 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, icl);
+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) {
+ struct soc_camera_link *icl = to_soc_camera_link(icd);
+
+ 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, icl);
+ }
+
+ 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,
+ struct v4l2_crop *a)
+{
+ struct soc_camera_device *icd = file->private_data;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ 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, &current_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_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;
+
+ /*
+ * This will not yet call v4l2_subdev_core_ops::s_power(1), because the
+ * subdevice has not been initialised yet. We'll have to call it once
+ * again after initialisation, even though it shouldn't be needed, we
+ * don't do any IO here.
+ */
+ ret = soc_camera_power_on(icd, icl);
+ if (ret < 0)
+ goto epower;
+
+ /* 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))
+ 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;
+
+ ret = v4l2_subdev_call(sd, core, s_power, 1);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ goto esdpwr;
+
+ /* 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);
+
+ soc_camera_power_off(icd, icl);
+
+ mutex_unlock(&icd->video_lock);
+
+ return 0;
+
+esdpwr:
+ video_unregister_device(icd->vdev);
+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:
+ soc_camera_power_off(icd, icl);
+epower:
+ 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, 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_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");

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