forked from Minki/linux
24105ebc05
With the introduction of CSI2 support on sh-mobile, the host driver switched to using v4l2_device_call_until_err() with grp_id == 0 to call subdev operations on the sensor and the CSI2 subdev. However, this has broken multi-client set ups like the one on migor, because that way all operations get called on both clients. To fix this add a grp_id and set it to the client private context. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1591 lines
39 KiB
C
1591 lines
39 KiB
C
/*
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* camera image capture (abstract) bus driver
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*
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* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
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*
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* This driver provides an interface between platform-specific camera
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* busses and camera devices. It should be used if the camera is
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* connected not over a "proper" bus like PCI or USB, but over a
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* special bus, like, for example, the Quick Capture interface on PXA270
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* SoCs. Later it should also be used for i.MX31 SoCs from Freescale.
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* It can handle multiple cameras and / or multiple busses, which can
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* be used, e.g., in stereo-vision applications.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/pm_runtime.h>
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#include <linux/vmalloc.h>
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#include <media/soc_camera.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-dev.h>
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#include <media/videobuf-core.h>
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#include <media/videobuf2-core.h>
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#include <media/soc_mediabus.h>
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/* Default to VGA resolution */
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#define DEFAULT_WIDTH 640
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#define DEFAULT_HEIGHT 480
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static LIST_HEAD(hosts);
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static LIST_HEAD(devices);
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static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */
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static int soc_camera_power_set(struct soc_camera_device *icd,
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struct soc_camera_link *icl,
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int power_on)
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{
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int ret;
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if (power_on) {
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ret = regulator_bulk_enable(icl->num_regulators,
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icl->regulators);
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if (ret < 0) {
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dev_err(&icd->dev, "Cannot enable regulators\n");
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return ret;
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}
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if (icl->power)
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ret = icl->power(icd->pdev, power_on);
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if (ret < 0) {
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dev_err(&icd->dev,
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"Platform failed to power-on the camera.\n");
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regulator_bulk_disable(icl->num_regulators,
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icl->regulators);
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return ret;
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}
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} else {
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ret = 0;
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if (icl->power)
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ret = icl->power(icd->pdev, 0);
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if (ret < 0) {
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dev_err(&icd->dev,
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"Platform failed to power-off the camera.\n");
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return ret;
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}
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ret = regulator_bulk_disable(icl->num_regulators,
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icl->regulators);
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if (ret < 0) {
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dev_err(&icd->dev, "Cannot disable regulators\n");
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return ret;
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}
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}
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return 0;
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}
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const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
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struct soc_camera_device *icd, unsigned int fourcc)
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{
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unsigned int i;
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for (i = 0; i < icd->num_user_formats; i++)
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if (icd->user_formats[i].host_fmt->fourcc == fourcc)
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return icd->user_formats + i;
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return NULL;
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}
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EXPORT_SYMBOL(soc_camera_xlate_by_fourcc);
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/**
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* soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags
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* @icl: camera platform parameters
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* @flags: flags to be inverted according to platform configuration
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* @return: resulting flags
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*/
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unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl,
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unsigned long flags)
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{
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unsigned long f;
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/* If only one of the two polarities is supported, switch to the opposite */
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if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) {
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f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW);
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if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW)
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flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW;
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}
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if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) {
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f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW);
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if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW)
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flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW;
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}
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if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) {
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f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING);
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if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING)
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flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING;
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}
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return flags;
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}
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EXPORT_SYMBOL(soc_camera_apply_sensor_flags);
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static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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struct soc_camera_device *icd = file->private_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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WARN_ON(priv != file->private_data);
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/* Only single-plane capture is supported so far */
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if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
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return -EINVAL;
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/* limit format to hardware capabilities */
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return ici->ops->try_fmt(icd, f);
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}
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static int soc_camera_enum_input(struct file *file, void *priv,
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struct v4l2_input *inp)
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{
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struct soc_camera_device *icd = file->private_data;
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int ret = 0;
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if (inp->index != 0)
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return -EINVAL;
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if (icd->ops->enum_input)
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ret = icd->ops->enum_input(icd, inp);
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else {
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/* default is camera */
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inp->type = V4L2_INPUT_TYPE_CAMERA;
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inp->std = V4L2_STD_UNKNOWN;
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strcpy(inp->name, "Camera");
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}
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return ret;
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}
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static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i)
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{
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*i = 0;
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return 0;
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}
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static int soc_camera_s_input(struct file *file, void *priv, unsigned int i)
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{
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if (i > 0)
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return -EINVAL;
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return 0;
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}
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static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a)
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{
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struct soc_camera_device *icd = file->private_data;
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struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
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return v4l2_subdev_call(sd, core, s_std, *a);
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}
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static int soc_camera_enum_fsizes(struct file *file, void *fh,
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struct v4l2_frmsizeenum *fsize)
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{
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struct soc_camera_device *icd = file->private_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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return ici->ops->enum_fsizes(icd, fsize);
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}
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static int soc_camera_reqbufs(struct file *file, void *priv,
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struct v4l2_requestbuffers *p)
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{
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int ret;
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struct soc_camera_device *icd = file->private_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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WARN_ON(priv != file->private_data);
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if (icd->streamer && icd->streamer != file)
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return -EBUSY;
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if (ici->ops->init_videobuf) {
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ret = videobuf_reqbufs(&icd->vb_vidq, p);
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if (ret < 0)
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return ret;
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ret = ici->ops->reqbufs(icd, p);
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} else {
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ret = vb2_reqbufs(&icd->vb2_vidq, p);
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}
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if (!ret && !icd->streamer)
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icd->streamer = file;
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return ret;
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}
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static int soc_camera_querybuf(struct file *file, void *priv,
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struct v4l2_buffer *p)
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{
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struct soc_camera_device *icd = file->private_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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WARN_ON(priv != file->private_data);
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if (ici->ops->init_videobuf)
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return videobuf_querybuf(&icd->vb_vidq, p);
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else
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return vb2_querybuf(&icd->vb2_vidq, p);
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}
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static int soc_camera_qbuf(struct file *file, void *priv,
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struct v4l2_buffer *p)
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{
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struct soc_camera_device *icd = file->private_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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WARN_ON(priv != file->private_data);
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if (icd->streamer != file)
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return -EBUSY;
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if (ici->ops->init_videobuf)
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return videobuf_qbuf(&icd->vb_vidq, p);
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else
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return vb2_qbuf(&icd->vb2_vidq, p);
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}
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static int soc_camera_dqbuf(struct file *file, void *priv,
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struct v4l2_buffer *p)
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{
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struct soc_camera_device *icd = file->private_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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WARN_ON(priv != file->private_data);
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if (icd->streamer != file)
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return -EBUSY;
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if (ici->ops->init_videobuf)
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return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK);
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else
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return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK);
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}
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/* Always entered with .video_lock held */
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static int soc_camera_init_user_formats(struct soc_camera_device *icd)
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{
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struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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unsigned int i, fmts = 0, raw_fmts = 0;
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int ret;
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enum v4l2_mbus_pixelcode code;
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while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code))
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raw_fmts++;
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if (!ici->ops->get_formats)
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/*
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* Fallback mode - the host will have to serve all
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* sensor-provided formats one-to-one to the user
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*/
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fmts = raw_fmts;
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else
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/*
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* First pass - only count formats this host-sensor
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* configuration can provide
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*/
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for (i = 0; i < raw_fmts; i++) {
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ret = ici->ops->get_formats(icd, i, NULL);
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if (ret < 0)
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return ret;
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fmts += ret;
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}
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if (!fmts)
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return -ENXIO;
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icd->user_formats =
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vmalloc(fmts * sizeof(struct soc_camera_format_xlate));
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if (!icd->user_formats)
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return -ENOMEM;
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icd->num_user_formats = fmts;
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dev_dbg(&icd->dev, "Found %d supported formats.\n", fmts);
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/* Second pass - actually fill data formats */
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fmts = 0;
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for (i = 0; i < raw_fmts; i++)
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if (!ici->ops->get_formats) {
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v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code);
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icd->user_formats[i].host_fmt =
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soc_mbus_get_fmtdesc(code);
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icd->user_formats[i].code = code;
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} else {
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ret = ici->ops->get_formats(icd, i,
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&icd->user_formats[fmts]);
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if (ret < 0)
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goto egfmt;
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fmts += ret;
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}
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icd->current_fmt = &icd->user_formats[0];
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return 0;
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egfmt:
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icd->num_user_formats = 0;
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vfree(icd->user_formats);
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return ret;
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}
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/* Always entered with .video_lock held */
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static void soc_camera_free_user_formats(struct soc_camera_device *icd)
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{
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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if (ici->ops->put_formats)
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ici->ops->put_formats(icd);
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icd->current_fmt = NULL;
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icd->num_user_formats = 0;
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vfree(icd->user_formats);
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icd->user_formats = NULL;
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}
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#define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \
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((x) >> 24) & 0xff
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/* Called with .vb_lock held, or from the first open(2), see comment there */
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static int soc_camera_set_fmt(struct soc_camera_device *icd,
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struct v4l2_format *f)
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{
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct v4l2_pix_format *pix = &f->fmt.pix;
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int ret;
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dev_dbg(&icd->dev, "S_FMT(%c%c%c%c, %ux%u)\n",
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pixfmtstr(pix->pixelformat), pix->width, pix->height);
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/* We always call try_fmt() before set_fmt() or set_crop() */
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ret = ici->ops->try_fmt(icd, f);
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if (ret < 0)
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return ret;
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ret = ici->ops->set_fmt(icd, f);
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if (ret < 0) {
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return ret;
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} else if (!icd->current_fmt ||
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icd->current_fmt->host_fmt->fourcc != pix->pixelformat) {
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dev_err(&icd->dev,
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"Host driver hasn't set up current format correctly!\n");
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return -EINVAL;
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}
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icd->user_width = pix->width;
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icd->user_height = pix->height;
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icd->bytesperline = pix->bytesperline;
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icd->sizeimage = pix->sizeimage;
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icd->colorspace = pix->colorspace;
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icd->field = pix->field;
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if (ici->ops->init_videobuf)
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icd->vb_vidq.field = pix->field;
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dev_dbg(&icd->dev, "set width: %d height: %d\n",
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icd->user_width, icd->user_height);
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|
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/* set physical bus parameters */
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return ici->ops->set_bus_param(icd, pix->pixelformat);
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}
|
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|
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static int soc_camera_open(struct file *file)
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{
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struct video_device *vdev = video_devdata(file);
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struct soc_camera_device *icd = container_of(vdev->parent,
|
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struct soc_camera_device,
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dev);
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struct soc_camera_link *icl = to_soc_camera_link(icd);
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struct soc_camera_host *ici;
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int ret;
|
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|
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if (!icd->ops)
|
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/* No device driver attached */
|
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return -ENODEV;
|
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|
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ici = to_soc_camera_host(icd->dev.parent);
|
|
|
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if (!try_module_get(ici->ops->owner)) {
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dev_err(&icd->dev, "Couldn't lock capture bus driver.\n");
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return -EINVAL;
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}
|
|
|
|
icd->use_count++;
|
|
|
|
/* Now we really have to activate the camera */
|
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if (icd->use_count == 1) {
|
|
/* Restore parameters before the last close() per V4L2 API */
|
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struct v4l2_format f = {
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.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
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.fmt.pix = {
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.width = icd->user_width,
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.height = icd->user_height,
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.field = icd->field,
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.colorspace = icd->colorspace,
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.pixelformat =
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icd->current_fmt->host_fmt->fourcc,
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},
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};
|
|
|
|
ret = soc_camera_power_set(icd, icl, 1);
|
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if (ret < 0)
|
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goto epower;
|
|
|
|
/* The camera could have been already on, try to reset */
|
|
if (icl->reset)
|
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icl->reset(icd->pdev);
|
|
|
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ret = ici->ops->add(icd);
|
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if (ret < 0) {
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dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret);
|
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goto eiciadd;
|
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}
|
|
|
|
pm_runtime_enable(&icd->vdev->dev);
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ret = pm_runtime_resume(&icd->vdev->dev);
|
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if (ret < 0 && ret != -ENOSYS)
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goto eresume;
|
|
|
|
/*
|
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* Try to configure with default parameters. Notice: this is the
|
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* very first open, so, we cannot race against other calls,
|
|
* apart from someone else calling open() simultaneously, but
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* .video_lock is protecting us against it.
|
|
*/
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ret = soc_camera_set_fmt(icd, &f);
|
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if (ret < 0)
|
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goto esfmt;
|
|
|
|
if (ici->ops->init_videobuf) {
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|
ici->ops->init_videobuf(&icd->vb_vidq, icd);
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} else {
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ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd);
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if (ret < 0)
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goto einitvb;
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|
}
|
|
}
|
|
|
|
file->private_data = icd;
|
|
dev_dbg(&icd->dev, "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:
|
|
ici->ops->remove(icd);
|
|
eiciadd:
|
|
soc_camera_power_set(icd, icl, 0);
|
|
epower:
|
|
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->dev.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);
|
|
|
|
ici->ops->remove(icd);
|
|
if (ici->ops->init_videobuf2)
|
|
vb2_queue_release(&icd->vb2_vidq);
|
|
|
|
soc_camera_power_set(icd, icl, 0);
|
|
}
|
|
|
|
if (icd->streamer == file)
|
|
icd->streamer = NULL;
|
|
|
|
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;
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
int err;
|
|
|
|
dev_dbg(&icd->dev, "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->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 (ici->ops->init_videobuf && 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);
|
|
}
|
|
|
|
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->dev, "Wrong buf-type %d\n", f->type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (icd->streamer && icd->streamer != file)
|
|
return -EBUSY;
|
|
|
|
if (icd->vb_vidq.bufs[0]) {
|
|
dev_err(&icd->dev, "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->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 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 (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->dev.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_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;
|
|
|
|
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->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);
|
|
|
|
/* 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);
|
|
}
|
|
|
|
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,
|
|
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));
|
|
|
|
ret = regulator_bulk_get(icd->pdev, icl->num_regulators,
|
|
icl->regulators);
|
|
if (ret < 0)
|
|
goto ereg;
|
|
|
|
ret = soc_camera_power_set(icd, icl, 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)
|
|
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;
|
|
}
|
|
}
|
|
|
|
sd = soc_camera_to_subdev(icd);
|
|
sd->grp_id = (long)icd;
|
|
|
|
/* 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;
|
|
|
|
icd->vdev->lock = &icd->video_lock;
|
|
|
|
/*
|
|
* ..._video_start() will create a device node, video_register_device()
|
|
* itself is protected against concurrent open() calls, but we also have
|
|
* to protect our data.
|
|
*/
|
|
mutex_lock(&icd->video_lock);
|
|
|
|
ret = soc_camera_video_start(icd);
|
|
if (ret < 0)
|
|
goto evidstart;
|
|
|
|
/* Try to improve our guess of a reasonable window format */
|
|
if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) {
|
|
icd->user_width = mf.width;
|
|
icd->user_height = mf.height;
|
|
icd->colorspace = mf.colorspace;
|
|
icd->field = mf.field;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
soc_camera_power_set(icd, icl, 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:
|
|
soc_camera_power_set(icd, icl, 0);
|
|
epower:
|
|
regulator_bulk_free(icl->num_regulators, icl->regulators);
|
|
ereg:
|
|
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) {
|
|
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) ?
|
|
to_soc_camera_control(icd)->driver : NULL;
|
|
if (drv) {
|
|
icl->del_device(icl);
|
|
module_put(drv->owner);
|
|
}
|
|
}
|
|
soc_camera_free_user_formats(icd);
|
|
|
|
regulator_bulk_free(icl->num_regulators, icl->regulators);
|
|
|
|
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 int default_enum_fsizes(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;
|
|
}
|
|
|
|
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->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_fsizes)
|
|
ici->ops->enum_fsizes = default_enum_fsizes;
|
|
|
|
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_enum_framesizes = soc_camera_enum_fsizes,
|
|
.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");
|