diff options
Diffstat (limited to 'drivers/media/video/soc_camera.c')
| -rw-r--r-- | drivers/media/video/soc_camera.c | 1473 |
1 files changed, 0 insertions, 1473 deletions
diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c deleted file mode 100644 index 43848a751d1..00000000000 --- a/drivers/media/video/soc_camera.c +++ /dev/null @@ -1,1473 +0,0 @@ -/* - * 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/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/soc_mediabus.h> - -/* Default to VGA resolution */ -#define DEFAULT_WIDTH 640 -#define DEFAULT_HEIGHT 480 - -static LIST_HEAD(hosts); -static LIST_HEAD(devices); -static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */ - -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_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags - * @icl: camera platform parameters - * @flags: flags to be inverted according to platform configuration - * @return: resulting flags - */ -unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl, - unsigned long flags) -{ - unsigned long f; - - /* If only one of the two polarities is supported, switch to the opposite */ - if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) { - f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW); - if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW) - flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW; - } - - if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) { - f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW); - if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW) - flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW; - } - - if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) { - f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING); - if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING) - flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING; - } - - return flags; -} -EXPORT_SYMBOL(soc_camera_apply_sensor_flags); - -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; - struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); - - WARN_ON(priv != file->private_data); - - /* limit format to hardware capabilities */ - return ici->ops->try_fmt(icd, f); -} - -static int soc_camera_enum_input(struct file *file, void *priv, - struct v4l2_input *inp) -{ - struct soc_camera_device *icd = file->private_data; - int ret = 0; - - if (inp->index != 0) - return -EINVAL; - - if (icd->ops->enum_input) - ret = icd->ops->enum_input(icd, inp); - else { - /* default is camera */ - inp->type = V4L2_INPUT_TYPE_CAMERA; - inp->std = V4L2_STD_UNKNOWN; - strcpy(inp->name, "Camera"); - } - - return ret; -} - -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_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->dev.parent); - - WARN_ON(priv != file->private_data); - - if (icd->streamer && icd->streamer != file) - return -EBUSY; - - ret = videobuf_reqbufs(&icd->vb_vidq, p); - if (ret < 0) - return ret; - - ret = ici->ops->reqbufs(icd, 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; - - WARN_ON(priv != file->private_data); - - return videobuf_querybuf(&icd->vb_vidq, p); -} - -static int soc_camera_qbuf(struct file *file, void *priv, - struct v4l2_buffer *p) -{ - struct soc_camera_device *icd = file->private_data; - - WARN_ON(priv != file->private_data); - - if (icd->streamer != file) - return -EBUSY; - - return videobuf_qbuf(&icd->vb_vidq, p); -} - -static int soc_camera_dqbuf(struct file *file, void *priv, - struct v4l2_buffer *p) -{ - struct soc_camera_device *icd = file->private_data; - - WARN_ON(priv != file->private_data); - - if (icd->streamer != file) - return -EBUSY; - - return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK); -} - -/* 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->dev.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; - - icd->num_user_formats = fmts; - - dev_dbg(&icd->dev, "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[i].host_fmt = - soc_mbus_get_fmtdesc(code); - icd->user_formats[i].code = code; - } else { - ret = ici->ops->get_formats(icd, i, - &icd->user_formats[fmts]); - if (ret < 0) - goto egfmt; - fmts += ret; - } - - icd->current_fmt = &icd->user_formats[0]; - - return 0; - -egfmt: - icd->num_user_formats = 0; - 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->dev.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; -} - -#define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ - ((x) >> 24) & 0xff - -/* 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->dev.parent); - struct v4l2_pix_format *pix = &f->fmt.pix; - int ret; - - dev_dbg(&icd->dev, "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 = ici->ops->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->dev, - "Host driver hasn't set up current format correctly!\n"); - return -EINVAL; - } - - icd->user_width = pix->width; - icd->user_height = pix->height; - icd->colorspace = pix->colorspace; - icd->vb_vidq.field = - icd->field = pix->field; - - if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) - dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n", - f->type); - - dev_dbg(&icd->dev, "set width: %d height: %d\n", - icd->user_width, icd->user_height); - - /* set physical bus parameters */ - return ici->ops->set_bus_param(icd, pix->pixelformat); -} - -static int soc_camera_open(struct file *file) -{ - struct video_device *vdev = video_devdata(file); - struct soc_camera_device *icd = container_of(vdev->parent, - struct soc_camera_device, - dev); - struct soc_camera_link *icl = to_soc_camera_link(icd); - struct soc_camera_host *ici; - int ret; - - if (!icd->ops) - /* No device driver attached */ - return -ENODEV; - - ici = to_soc_camera_host(icd->dev.parent); - - if (!try_module_get(ici->ops->owner)) { - dev_err(&icd->dev, "Couldn't lock capture bus driver.\n"); - return -EINVAL; - } - - /* - * Protect against icd->ops->remove() until we module_get() both - * drivers. - */ - mutex_lock(&icd->video_lock); - - 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, - }, - }; - - if (icl->power) { - ret = icl->power(icd->pdev, 1); - if (ret < 0) - goto epower; - } - - /* 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) { - dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret); - goto eiciadd; - } - - 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; - } - - file->private_data = icd; - dev_dbg(&icd->dev, "camera device open\n"); - - ici->ops->init_videobuf(&icd->vb_vidq, icd); - - mutex_unlock(&icd->video_lock); - - return 0; - - /* - * First four errors are entered with the .video_lock held - * and use_count == 1 - */ -esfmt: - pm_runtime_disable(&icd->vdev->dev); -eresume: - ici->ops->remove(icd); -eiciadd: - if (icl->power) - icl->power(icd->pdev, 0); -epower: - icd->use_count--; - mutex_unlock(&icd->video_lock); - module_put(ici->ops->owner); - - 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->dev.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); - - ici->ops->remove(icd); - - if (icl->power) - icl->power(icd->pdev, 0); - } - - if (icd->streamer == file) - icd->streamer = NULL; - - mutex_unlock(&icd->video_lock); - - module_put(ici->ops->owner); - - dev_dbg(&icd->dev, "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->dev, "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; - int err; - - dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); - - if (icd->streamer != file) - return -EBUSY; - - err = videobuf_mmap_mapper(&icd->vb_vidq, vma); - - dev_dbg(&icd->dev, "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->dev.parent); - - if (icd->streamer != file) - return -EBUSY; - - if (list_empty(&icd->vb_vidq.stream)) { - dev_err(&icd->dev, "Trying to poll with no queued buffers!\n"); - return POLLERR; - } - - return ici->ops->poll(file, pt); -} - -static struct v4l2_file_operations soc_camera_fops = { - .owner = THIS_MODULE, - .open = soc_camera_open, - .release = soc_camera_close, - .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 (icd->streamer && icd->streamer != file) - return -EBUSY; - - mutex_lock(&icd->vb_vidq.vb_lock); - - if (icd->vb_vidq.bufs[0]) { - dev_err(&icd->dev, "S_FMT denied: queue initialised\n"); - ret = -EBUSY; - goto unlock; - } - - ret = soc_camera_set_fmt(icd, f); - - if (!ret && !icd->streamer) - icd->streamer = file; - -unlock: - mutex_unlock(&icd->vb_vidq.vb_lock); - - 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); - - pix->width = icd->user_width; - pix->height = icd->user_height; - pix->field = icd->vb_vidq.field; - pix->pixelformat = icd->current_fmt->host_fmt->fourcc; - pix->bytesperline = soc_mbus_bytes_per_line(pix->width, - icd->current_fmt->host_fmt); - pix->colorspace = icd->colorspace; - if (pix->bytesperline < 0) - return pix->bytesperline; - pix->sizeimage = pix->height * pix->bytesperline; - dev_dbg(&icd->dev, "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->dev.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 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; - - mutex_lock(&icd->video_lock); - - v4l2_subdev_call(sd, video, s_stream, 1); - - /* This calls buf_queue from host driver's videobuf_queue_ops */ - ret = videobuf_streamon(&icd->vb_vidq); - - mutex_unlock(&icd->video_lock); - - 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); - - WARN_ON(priv != file->private_data); - - if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) - return -EINVAL; - - if (icd->streamer != file) - return -EBUSY; - - mutex_lock(&icd->video_lock); - - /* - * This calls buf_release from host driver's videobuf_queue_ops for all - * remaining buffers. When the last buffer is freed, stop capture - */ - videobuf_streamoff(&icd->vb_vidq); - - v4l2_subdev_call(sd, video, s_stream, 0); - - mutex_unlock(&icd->video_lock); - - return 0; -} - -static int soc_camera_queryctrl(struct file *file, void *priv, - struct v4l2_queryctrl *qc) -{ - struct soc_camera_device *icd = file->private_data; - struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); - int i; - - WARN_ON(priv != file->private_data); - - if (!qc->id) - return -EINVAL; - - /* First check host controls */ - for (i = 0; i < ici->ops->num_controls; i++) - if (qc->id == ici->ops->controls[i].id) { - memcpy(qc, &(ici->ops->controls[i]), - sizeof(*qc)); - return 0; - } - - /* Then device controls */ - for (i = 0; i < icd->ops->num_controls; i++) - if (qc->id == icd->ops->controls[i].id) { - memcpy(qc, &(icd->ops->controls[i]), - sizeof(*qc)); - return 0; - } - - return -EINVAL; -} - -static int soc_camera_g_ctrl(struct file *file, void *priv, - struct v4l2_control *ctrl) -{ - struct soc_camera_device *icd = file->private_data; - struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - int ret; - - WARN_ON(priv != file->private_data); - - if (ici->ops->get_ctrl) { - ret = ici->ops->get_ctrl(icd, ctrl); - if (ret != -ENOIOCTLCMD) - return ret; - } - - return v4l2_subdev_call(sd, core, g_ctrl, ctrl); -} - -static int soc_camera_s_ctrl(struct file *file, void *priv, - struct v4l2_control *ctrl) -{ - struct soc_camera_device *icd = file->private_data; - struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - int ret; - - WARN_ON(priv != file->private_data); - - if (ici->ops->set_ctrl) { - ret = ici->ops->set_ctrl(icd, ctrl); - if (ret != -ENOIOCTLCMD) - return ret; - } - - return v4l2_subdev_call(sd, core, s_ctrl, ctrl); -} - -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->dev.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->dev.parent); - int ret; - - mutex_lock(&icd->vb_vidq.vb_lock); - ret = ici->ops->get_crop(icd, a); - mutex_unlock(&icd->vb_vidq.vb_lock); - - 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->dev.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->dev, "S_CROP(%ux%u@%u:%u)\n", - rect->width, rect->height, rect->left, rect->top); - - /* Cropping is allowed during a running capture, guard consistency */ - mutex_lock(&icd->vb_vidq.vb_lock); - - /* 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->dev, - "S_CROP denied: getting current crop failed\n"); - } else if (icd->vb_vidq.bufs[0] && - (a->c.width != current_crop.c.width || - a->c.height != current_crop.c.height)) { - dev_err(&icd->dev, - "S_CROP denied: queue initialised and sizes differ\n"); - ret = -EBUSY; - } else { - ret = ici->ops->set_crop(icd, a); - } - - mutex_unlock(&icd->vb_vidq.vb_lock); - - 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->dev.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->dev.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 - -/* So far this function cannot fail */ -static void scan_add_host(struct soc_camera_host *ici) -{ - struct soc_camera_device *icd; - - mutex_lock(&list_lock); - - list_for_each_entry(icd, &devices, list) { - if (icd->iface == ici->nr) { - int ret; - icd->dev.parent = ici->v4l2_dev.dev; - dev_set_name(&icd->dev, "%u-%u", icd->iface, - icd->devnum); - ret = device_register(&icd->dev); - if (ret < 0) { - icd->dev.parent = NULL; - dev_err(&icd->dev, - "Cannot register device: %d\n", ret); - } - } - } - - mutex_unlock(&list_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->dev.parent); - struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id); - struct v4l2_subdev *subdev; - - if (!adap) { - dev_err(&icd->dev, "Cannot get I2C adapter #%d. No driver?\n", - icl->i2c_adapter_id); - goto ei2cga; - } - - icl->board_info->platform_data = icd; - - subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, - NULL, icl->board_info, NULL); - if (!subdev) - goto ei2cnd; - - client = v4l2_get_subdevdata(subdev); - - /* Use to_i2c_client(dev) to recover the i2c client */ - dev_set_drvdata(&icd->dev, &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)); - dev_set_drvdata(&icd->dev, NULL); - v4l2_device_unregister_subdev(i2c_get_clientdata(client)); - i2c_unregister_device(client); - i2c_put_adapter(client->adapter); -} -#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 device *dev) -{ - struct soc_camera_device *icd = to_soc_camera_dev(dev); - struct soc_camera_host *ici = to_soc_camera_host(dev->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(dev, "Probing %s\n", dev_name(dev)); - - if (icl->power) { - ret = icl->power(icd->pdev, 1); - if (ret < 0) { - dev_err(dev, - "Platform failed to power-on the camera.\n"); - goto epower; - } - } - - /* 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(icl, &icd->dev); - 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(icl); - goto enodrv; - } - } - - /* 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, so we have to protect */ - 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 */ - sd = soc_camera_to_subdev(icd); - 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; - } - - /* Do we have to sysfs_remove_link() before device_unregister()? */ - if (sysfs_create_link(&icd->dev.kobj, &to_soc_camera_control(icd)->kobj, - "control")) - dev_warn(&icd->dev, "Failed creating the control symlink\n"); - - ici->ops->remove(icd); - - if (icl->power) - icl->power(icd->pdev, 0); - - mutex_unlock(&icd->video_lock); - - return 0; - -evidstart: - mutex_unlock(&icd->video_lock); - soc_camera_free_user_formats(icd); -eiufmt: - if (icl->board_info) { - soc_camera_free_i2c(icd); - } else { - icl->del_device(icl); - module_put(control->driver->owner); - } -enodrv: -eadddev: - video_device_release(icd->vdev); -evdc: - ici->ops->remove(icd); -eadd: - if (icl->power) - icl->power(icd->pdev, 0); -epower: - 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 device *dev) -{ - struct soc_camera_device *icd = to_soc_camera_dev(dev); - struct soc_camera_link *icl = to_soc_camera_link(icd); - struct video_device *vdev = icd->vdev; - - BUG_ON(!dev->parent); - - if (vdev) { - mutex_lock(&icd->video_lock); - video_unregister_device(vdev); - icd->vdev = NULL; - mutex_unlock(&icd->video_lock); - } - - if (icl->board_info) { - soc_camera_free_i2c(icd); - } else { - struct device_driver *drv = to_soc_camera_control(icd) ? - to_soc_camera_control(icd)->driver : NULL; - if (drv) { - icl->del_device(icl); - module_put(drv->owner); - } - } - soc_camera_free_user_formats(icd); - - return 0; -} - -static int soc_camera_suspend(struct device *dev, pm_message_t state) -{ - struct soc_camera_device *icd = to_soc_camera_dev(dev); - struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); - int ret = 0; - - if (ici->ops->suspend) - ret = ici->ops->suspend(icd, state); - - return ret; -} - -static int soc_camera_resume(struct device *dev) -{ - struct soc_camera_device *icd = to_soc_camera_dev(dev); - struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); - int ret = 0; - - if (ici->ops->resume) - ret = ici->ops->resume(icd); - - return ret; -} - -struct bus_type soc_camera_bus_type = { - .name = "soc-camera", - .probe = soc_camera_probe, - .remove = soc_camera_remove, - .suspend = soc_camera_suspend, - .resume = soc_camera_resume, -}; -EXPORT_SYMBOL_GPL(soc_camera_bus_type); - -static struct device_driver ic_drv = { - .name = "camera", - .bus = &soc_camera_bus_type, - .owner = THIS_MODULE, -}; - -static void dummy_release(struct device *dev) -{ -} - -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 void soc_camera_device_init(struct device *dev, void *pdata) -{ - dev->platform_data = pdata; - dev->bus = &soc_camera_bus_type; - dev->release = dummy_release; -} - -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->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; - - 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); - - 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) { - void *pdata = icd->dev.platform_data; - /* The bus->remove will be called */ - device_unregister(&icd->dev); - /* - * Not before device_unregister(), .remove - * needs parent to call ici->ops->remove(). - * If the host module is loaded again, device_register() - * would complain "already initialised," since 2.6.32 - * this is also needed to prevent use-after-free of the - * device private data. - */ - memset(&icd->dev, 0, sizeof(icd->dev)); - soc_camera_device_init(&icd->dev, pdata); - } - } - - 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 void soc_camera_device_unregister(struct soc_camera_device *icd) -{ - list_del(&icd->list); -} - -static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { - .vidioc_querycap = soc_camera_querycap, - .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, - .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, - .vidioc_s_fmt_vid_cap = soc_camera_s_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_reqbufs = soc_camera_reqbufs, - .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, - .vidioc_querybuf = soc_camera_querybuf, - .vidioc_qbuf = soc_camera_qbuf, - .vidioc_dqbuf = soc_camera_dqbuf, - .vidioc_streamon = soc_camera_streamon, - .vidioc_streamoff = soc_camera_streamoff, - .vidioc_queryctrl = soc_camera_queryctrl, - .vidioc_g_ctrl = soc_camera_g_ctrl, - .vidioc_s_ctrl = soc_camera_s_ctrl, - .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->dev.parent); - struct video_device *vdev = video_device_alloc(); - - if (!vdev) - return -ENOMEM; - - strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); - - vdev->parent = &icd->dev; - 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; - - 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) -{ - struct device_type *type = icd->vdev->dev.type; - int ret; - - if (!icd->dev.parent) - return -ENODEV; - - if (!icd->ops || - !icd->ops->query_bus_param || - !icd->ops->set_bus_param) - return -EINVAL; - - ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); - if (ret < 0) { - dev_err(&icd->dev, "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->pdev = &pdev->dev; - platform_set_drvdata(pdev, icd); - - ret = soc_camera_device_register(icd); - if (ret < 0) - goto escdevreg; - - soc_camera_device_init(&icd->dev, icl); - - 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; - - soc_camera_device_unregister(icd); - - kfree(icd); - - return 0; -} - -static struct platform_driver __refdata soc_camera_pdrv = { - .remove = __devexit_p(soc_camera_pdrv_remove), - .driver = { - .name = "soc-camera-pdrv", - .owner = THIS_MODULE, - }, -}; - -static int __init soc_camera_init(void) -{ - int ret = bus_register(&soc_camera_bus_type); - if (ret) - return ret; - ret = driver_register(&ic_drv); - if (ret) - goto edrvr; - - ret = platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe); - if (ret) - goto epdr; - - return 0; - -epdr: - driver_unregister(&ic_drv); -edrvr: - bus_unregister(&soc_camera_bus_type); - return ret; -} - -static void __exit soc_camera_exit(void) -{ - platform_driver_unregister(&soc_camera_pdrv); - driver_unregister(&ic_drv); - bus_unregister(&soc_camera_bus_type); -} - -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"); |