| /* |
| * 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->pdev, 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->pdev, 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->pdev, 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 (!try_module_get(ici->ops->owner)) { |
| dev_err(icd->pdev, "Couldn't lock capture bus driver.\n"); |
| return -EINVAL; |
| } |
| |
| 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); |
| } |
| |
| 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); |
| |
| 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); |
| |
| 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; |
| |
| 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 (ici->ops->init_videobuf) |
| err = videobuf_mmap_mapper(&icd->vb_vidq, vma); |
| else |
| err = vb2_mmap(&icd->vb2_vidq, vma); |
| |
| 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); |
| |
| if (icd->streamer != file) |
| return -EBUSY; |
| |
| if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) { |
| dev_err(icd->pdev, "Trying to poll with no queued buffers!\n"); |
| return POLLERR; |
| } |
| |
| return ici->ops->poll(file, pt); |
| } |
| |
| 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, ¤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_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_mbus_fsizes, &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; |
| /* Locking in file operations other than ioctl should be done |
| by the driver, not the V4L2 core. |
| This driver needs auditing so that this flag can be removed. */ |
| set_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags); |
| |
| 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 = { |
| .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_probe(&soc_camera_pdrv, soc_camera_pdrv_probe); |
| } |
| |
| 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"); |