| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Guennadi Liakhovetski | 7128 | 71.80% | 65 | 44.83% |
| Hans Verkuil | 739 | 7.44% | 23 | 15.86% |
| Ben Dooks | 644 | 6.49% | 1 | 0.69% |
| Laurent Pinchart | 391 | 3.94% | 11 | 7.59% |
| Sergio Aguirre | 196 | 1.97% | 2 | 1.38% |
| Qing Xu | 160 | 1.61% | 1 | 0.69% |
| Alberto Panizzo | 125 | 1.26% | 1 | 0.69% |
| Mauro Carvalho Chehab | 114 | 1.15% | 7 | 4.83% |
| Steve Longerbeam | 96 | 0.97% | 1 | 0.69% |
| Janusz Krzysztofik | 96 | 0.97% | 1 | 0.69% |
| Anatolij Gustschin | 76 | 0.77% | 2 | 1.38% |
| Kazunori Kobayashi | 53 | 0.53% | 1 | 0.69% |
| Josh Wu | 24 | 0.24% | 4 | 2.76% |
| Kuninori Morimoto | 14 | 0.14% | 2 | 1.38% |
| Sakari Ailus | 9 | 0.09% | 1 | 0.69% |
| Sachin Kamat | 9 | 0.09% | 2 | 1.38% |
| Sylwester Nawrocki | 6 | 0.06% | 2 | 1.38% |
| Wolfram Sang | 6 | 0.06% | 1 | 0.69% |
| Albert Wang | 6 | 0.06% | 1 | 0.69% |
| Philipp Zabel | 5 | 0.05% | 1 | 0.69% |
| Wenbing Wang | 5 | 0.05% | 1 | 0.69% |
| Stefan Herbrechtsmeier | 4 | 0.04% | 1 | 0.69% |
| Kees Cook | 4 | 0.04% | 1 | 0.69% |
| Lei Wen | 4 | 0.04% | 1 | 0.69% |
| Al Viro | 2 | 0.02% | 2 | 1.38% |
| Tejun Heo | 2 | 0.02% | 1 | 0.69% |
| Linus Torvalds | 2 | 0.02% | 1 | 0.69% |
| Paulius Zaleckas | 2 | 0.02% | 1 | 0.69% |
| Peter Senna Tschudin | 1 | 0.01% | 1 | 0.69% |
| Bhumika Goyal | 1 | 0.01% | 1 | 0.69% |
| Junghak Sung | 1 | 0.01% | 1 | 0.69% |
| Geert Uytterhoeven | 1 | 0.01% | 1 | 0.69% |
| Rob Herring | 1 | 0.01% | 1 | 0.69% |
| Andrew Morton | 1 | 0.01% | 1 | 0.69% |
| Total | 9928 | 145 |
/* * 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/module.h> #include <linux/mutex.h> #include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/vmalloc.h> #include <media/soc_camera.h> #include <media/drv-intf/soc_mediabus.h> #include <media/v4l2-async.h> #include <media/v4l2-clk.h> #include <media/v4l2-common.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-dev.h> #include <media/v4l2-fwnode.h> #include <media/videobuf2-v4l2.h> /* Default to VGA resolution */ #define DEFAULT_WIDTH 640 #define DEFAULT_HEIGHT 480 #define MAP_MAX_NUM 32 static DECLARE_BITMAP(device_map, MAP_MAX_NUM); static LIST_HEAD(hosts); static LIST_HEAD(devices); /* * Protects lists and bitmaps of hosts and devices. * Lock nesting: Ok to take ->host_lock under list_lock. */ static DEFINE_MUTEX(list_lock); struct soc_camera_async_client { struct v4l2_async_subdev *sensor; struct v4l2_async_notifier notifier; struct platform_device *pdev; struct list_head list; /* needed for clean up */ }; static int soc_camera_video_start(struct soc_camera_device *icd); static int video_dev_create(struct soc_camera_device *icd); int soc_camera_power_on(struct device *dev, struct soc_camera_subdev_desc *ssdd, struct v4l2_clk *clk) { int ret; bool clock_toggle; if (clk && (!ssdd->unbalanced_power || !test_and_set_bit(0, &ssdd->clock_state))) { ret = v4l2_clk_enable(clk); if (ret < 0) { dev_err(dev, "Cannot enable clock: %d\n", ret); return ret; } clock_toggle = true; } else { clock_toggle = false; } ret = regulator_bulk_enable(ssdd->sd_pdata.num_regulators, ssdd->sd_pdata.regulators); if (ret < 0) { dev_err(dev, "Cannot enable regulators\n"); goto eregenable; } if (ssdd->power) { ret = ssdd->power(dev, 1); if (ret < 0) { dev_err(dev, "Platform failed to power-on the camera.\n"); goto epwron; } } return 0; epwron: regulator_bulk_disable(ssdd->sd_pdata.num_regulators, ssdd->sd_pdata.regulators); eregenable: if (clock_toggle) v4l2_clk_disable(clk); return ret; } EXPORT_SYMBOL(soc_camera_power_on); int soc_camera_power_off(struct device *dev, struct soc_camera_subdev_desc *ssdd, struct v4l2_clk *clk) { int ret = 0; int err; if (ssdd->power) { err = ssdd->power(dev, 0); if (err < 0) { dev_err(dev, "Platform failed to power-off the camera.\n"); ret = err; } } err = regulator_bulk_disable(ssdd->sd_pdata.num_regulators, ssdd->sd_pdata.regulators); if (err < 0) { dev_err(dev, "Cannot disable regulators\n"); ret = ret ? : err; } if (clk && (!ssdd->unbalanced_power || test_and_clear_bit(0, &ssdd->clock_state))) v4l2_clk_disable(clk); return ret; } EXPORT_SYMBOL(soc_camera_power_off); int soc_camera_power_init(struct device *dev, struct soc_camera_subdev_desc *ssdd) { /* Should not have any effect in synchronous case */ return devm_regulator_bulk_get(dev, ssdd->sd_pdata.num_regulators, ssdd->sd_pdata.regulators); } EXPORT_SYMBOL(soc_camera_power_init); static int __soc_camera_power_on(struct soc_camera_device *icd) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); int ret; ret = v4l2_subdev_call(sd, core, s_power, 1); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) return ret; return 0; } static int __soc_camera_power_off(struct soc_camera_device *icd) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); int ret; ret = v4l2_subdev_call(sd, core, s_power, 0); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) return ret; return 0; } static int soc_camera_clock_start(struct soc_camera_host *ici) { int ret; if (!ici->ops->clock_start) return 0; mutex_lock(&ici->clk_lock); ret = ici->ops->clock_start(ici); mutex_unlock(&ici->clk_lock); return ret; } static void soc_camera_clock_stop(struct soc_camera_host *ici) { if (!ici->ops->clock_stop) return; mutex_lock(&ici->clk_lock); ici->ops->clock_stop(ici); mutex_unlock(&ici->clk_lock); } 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 * @ssdd: camera platform parameters * @cfg: media bus configuration * @return: resulting flags */ unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd, 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 (ssdd->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 (ssdd->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 (ssdd->flags & SOCAM_SENSOR_INVERT_PCLK) { f = flags & (V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING); if (f == V4L2_MBUS_PCLK_SAMPLE_RISING || f == V4L2_MBUS_PCLK_SAMPLE_FALLING) flags ^= V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING; } return flags; } EXPORT_SYMBOL(soc_camera_apply_board_flags); #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ ((x) >> 24) & 0xff static int soc_camera_try_fmt(struct soc_camera_device *icd, struct v4l2_format *f) { struct soc_camera_host *ici = to_soc_camera_host(icd->parent); const struct soc_camera_format_xlate *xlate; struct v4l2_pix_format *pix = &f->fmt.pix; int ret; dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n", pixfmtstr(pix->pixelformat), pix->width, pix->height); if (pix->pixelformat != V4L2_PIX_FMT_JPEG && !(ici->capabilities & SOCAM_HOST_CAP_STRIDE)) { pix->bytesperline = 0; pix->sizeimage = 0; } ret = ici->ops->try_fmt(icd, f); if (ret < 0) return ret; xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); if (!xlate) return -EINVAL; ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt); if (ret < 0) return ret; pix->bytesperline = max_t(u32, pix->bytesperline, ret); ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline, pix->height); if (ret < 0) return ret; pix->sizeimage = max_t(u32, pix->sizeimage, ret); return 0; } static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct soc_camera_device *icd = file->private_data; WARN_ON(priv != file->private_data); /* Only single-plane capture is supported so far */ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; /* limit format to hardware capabilities */ return soc_camera_try_fmt(icd, f); } static int soc_camera_enum_input(struct file *file, void *priv, struct v4l2_input *inp) { struct soc_camera_device *icd = file->private_data; if (inp->index != 0) return -EINVAL; /* default is camera */ inp->type = V4L2_INPUT_TYPE_CAMERA; inp->std = icd->vdev->tvnorms; strscpy(inp->name, "Camera", sizeof(inp->name)); 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, video, 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, video, 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; WARN_ON(priv != file->private_data); if (icd->streamer && icd->streamer != file) return -EBUSY; ret = vb2_reqbufs(&icd->vb2_vidq, p); if (!ret) icd->streamer = p->count ? file : NULL; return ret; } static int soc_camera_querybuf(struct file *file, void *priv, struct v4l2_buffer *p) { struct soc_camera_device *icd = file->private_data; WARN_ON(priv != file->private_data); return 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; WARN_ON(priv != file->private_data); if (icd->streamer != file) return -EBUSY; return vb2_qbuf(&icd->vb2_vidq, NULL, p); } static int soc_camera_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p) { struct soc_camera_device *icd = file->private_data; WARN_ON(priv != file->private_data); if (icd->streamer != file) return -EBUSY; return 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; int ret; if (icd->streamer && icd->streamer != file) return -EBUSY; ret = vb2_create_bufs(&icd->vb2_vidq, create); if (!ret) icd->streamer = file; return ret; } static int soc_camera_prepare_buf(struct file *file, void *priv, struct v4l2_buffer *b) { struct soc_camera_device *icd = file->private_data; return vb2_prepare_buf(&icd->vb2_vidq, NULL, b); } static int soc_camera_expbuf(struct file *file, void *priv, struct v4l2_exportbuffer *p) { struct soc_camera_device *icd = file->private_data; if (icd->streamer && icd->streamer != file) return -EBUSY; return vb2_expbuf(&icd->vb2_vidq, p); } /* Always entered with .host_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; struct v4l2_subdev_mbus_code_enum code = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; while (!v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code)) { raw_fmts++; code.index++; } 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(array_size(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) { code.index = i; v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code); icd->user_formats[fmts].host_fmt = soc_mbus_get_fmtdesc(code.code); if (icd->user_formats[fmts].host_fmt) icd->user_formats[fmts++].code = 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 .host_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_selection() */ 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; 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_add_device(struct soc_camera_device *icd) { struct soc_camera_host *ici = to_soc_camera_host(icd->parent); int ret; if (ici->icd) return -EBUSY; if (!icd->clk) { ret = soc_camera_clock_start(ici); if (ret < 0) return ret; } if (ici->ops->add) { ret = ici->ops->add(icd); if (ret < 0) goto eadd; } ici->icd = icd; return 0; eadd: if (!icd->clk) soc_camera_clock_stop(ici); return ret; } static void soc_camera_remove_device(struct soc_camera_device *icd) { struct soc_camera_host *ici = to_soc_camera_host(icd->parent); if (WARN_ON(icd != ici->icd)) return; if (ici->ops->remove) ici->ops->remove(icd); if (!icd->clk) soc_camera_clock_stop(ici); ici->icd = NULL; } static int soc_camera_open(struct file *file) { struct video_device *vdev = video_devdata(file); struct soc_camera_device *icd; struct soc_camera_host *ici; int ret; /* * Don't mess with the host during probe: wait until the loop in * scan_add_host() completes. Also protect against a race with * soc_camera_host_unregister(). */ if (mutex_lock_interruptible(&list_lock)) return -ERESTARTSYS; if (!vdev || !video_is_registered(vdev)) { mutex_unlock(&list_lock); return -ENODEV; } icd = video_get_drvdata(vdev); ici = to_soc_camera_host(icd->parent); ret = try_module_get(ici->ops->owner) ? 0 : -ENODEV; mutex_unlock(&list_lock); if (ret < 0) { dev_err(icd->pdev, "Couldn't lock capture bus driver.\n"); return ret; } if (!to_soc_camera_control(icd)) { /* No device driver attached */ ret = -ENODEV; goto econtrol; } if (mutex_lock_interruptible(&ici->host_lock)) { ret = -ERESTARTSYS; goto elockhost; } icd->use_count++; /* Now we really have to activate the camera */ if (icd->use_count == 1) { struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); /* 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 (sdesc->subdev_desc.reset) if (icd->control) sdesc->subdev_desc.reset(icd->control); ret = soc_camera_add_device(icd); if (ret < 0) { dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); goto eiciadd; } ret = __soc_camera_power_on(icd); if (ret < 0) goto epower; pm_runtime_enable(&icd->vdev->dev); ret = pm_runtime_resume(&icd->vdev->dev); if (ret < 0 && ret != -ENOSYS) goto eresume; /* * Try to configure with default parameters. Notice: this is the * very first open, so, we cannot race against other calls, * apart from someone else calling open() simultaneously, but * .host_lock is protecting us against it. */ ret = soc_camera_set_fmt(icd, &f); if (ret < 0) goto esfmt; ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd); if (ret < 0) goto einitvb; v4l2_ctrl_handler_setup(&icd->ctrl_handler); } mutex_unlock(&ici->host_lock); file->private_data = icd; dev_dbg(icd->pdev, "camera device open\n"); return 0; /* * All errors are entered with the .host_lock held, first four also * with use_count == 1 */ einitvb: esfmt: pm_runtime_disable(&icd->vdev->dev); eresume: __soc_camera_power_off(icd); epower: soc_camera_remove_device(icd); eiciadd: icd->use_count--; mutex_unlock(&ici->host_lock); elockhost: econtrol: 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); mutex_lock(&ici->host_lock); if (icd->streamer == file) { if (ici->ops->init_videobuf2) vb2_queue_release(&icd->vb2_vidq); icd->streamer = NULL; } icd->use_count--; if (!icd->use_count) { pm_runtime_suspend(&icd->vdev->dev); pm_runtime_disable(&icd->vdev->dev); __soc_camera_power_off(icd); soc_camera_remove_device(icd); } mutex_unlock(&ici->host_lock); module_put(ici->ops->owner); dev_dbg(icd->pdev, "camera device close\n"); return 0; } static ssize_t soc_camera_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { struct soc_camera_device *icd = file->private_data; struct soc_camera_host *ici = to_soc_camera_host(icd->parent); dev_dbg(icd->pdev, "read called, buf %p\n", buf); if (ici->ops->init_videobuf2 && icd->vb2_vidq.io_modes & VB2_READ) return vb2_read(&icd->vb2_vidq, buf, count, ppos, file->f_flags & O_NONBLOCK); dev_err(icd->pdev, "camera device read not implemented\n"); return -EINVAL; } 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=%p\n", vma); if (icd->streamer != file) return -EBUSY; if (mutex_lock_interruptible(&ici->host_lock)) return -ERESTARTSYS; err = vb2_mmap(&icd->vb2_vidq, vma); mutex_unlock(&ici->host_lock); dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n", (unsigned long)vma->vm_start, (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, err); return err; } static __poll_t 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); __poll_t res = EPOLLERR; if (icd->streamer != file) return EPOLLERR; mutex_lock(&ici->host_lock); res = ici->ops->poll(file, pt); mutex_unlock(&ici->host_lock); return res; } static const 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 (vb2_is_streaming(&icd->vb2_vidq)) { 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) strscpy(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); strscpy(cap->driver, ici->drv_name, sizeof(cap->driver)); return ici->ops->querycap(ici, cap); } static int soc_camera_streamon(struct file *file, void *priv, enum v4l2_buf_type i) { struct soc_camera_device *icd = file->private_data; struct v4l2_subdev *sd = soc_camera_to_subdev(icd); int ret; WARN_ON(priv != file->private_data); if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; if (icd->streamer != file) return -EBUSY; /* This calls buf_queue from host driver's videobuf2_queue_ops */ 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); 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_release from host driver's videobuf2_queue_ops for all * remaining buffers. When the last buffer is freed, stop capture */ ret = vb2_streamoff(&icd->vb2_vidq, i); v4l2_subdev_call(sd, video, s_stream, 0); return ret; } static int soc_camera_g_selection(struct file *file, void *fh, struct v4l2_selection *s) { struct soc_camera_device *icd = file->private_data; struct soc_camera_host *ici = to_soc_camera_host(icd->parent); /* With a wrong type no need to try to fall back to cropping */ if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; return ici->ops->get_selection(icd, s); } static int soc_camera_s_selection(struct file *file, void *fh, struct v4l2_selection *s) { struct soc_camera_device *icd = file->private_data; struct soc_camera_host *ici = to_soc_camera_host(icd->parent); int ret; /* In all these cases cropping emulation will not help */ if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || (s->target != V4L2_SEL_TGT_COMPOSE && s->target != V4L2_SEL_TGT_CROP)) return -EINVAL; if (s->target == V4L2_SEL_TGT_COMPOSE) { /* No output size change during a running capture! */ if (vb2_is_streaming(&icd->vb2_vidq) && (icd->user_width != s->r.width || icd->user_height != s->r.height)) return -EBUSY; /* * Only one user is allowed to change the output format, touch * buffers, start / stop streaming, poll for data */ if (icd->streamer && icd->streamer != file) return -EBUSY; } if (s->target == V4L2_SEL_TGT_CROP && vb2_is_streaming(&icd->vb2_vidq) && ici->ops->set_liveselection) ret = ici->ops->set_liveselection(icd, s); else ret = ici->ops->set_selection(icd, s); if (!ret && s->target == V4L2_SEL_TGT_COMPOSE) { icd->user_width = s->r.width; icd->user_height = s->r.height; if (!icd->streamer) icd->streamer = file; } return ret; } static int soc_camera_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) { struct soc_camera_device *icd = file->private_data; struct soc_camera_host *ici = to_soc_camera_host(icd->parent); if (ici->ops->get_parm) return ici->ops->get_parm(icd, a); return -ENOIOCTLCMD; } static int soc_camera_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) { struct soc_camera_device *icd = file->private_data; struct soc_camera_host *ici = to_soc_camera_host(icd->parent); if (ici->ops->set_parm) return ici->ops->set_parm(icd, a); return -ENOIOCTLCMD; } static int soc_camera_probe(struct soc_camera_host *ici, 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(&list_lock); list_for_each_entry(icd, &devices, list) if (icd->iface == ici->nr) { struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); struct soc_camera_subdev_desc *ssdd = &sdesc->subdev_desc; /* The camera could have been already on, try to reset */ if (ssdd->reset) if (icd->control) ssdd->reset(icd->control); icd->parent = ici->v4l2_dev.dev; /* Ignore errors */ soc_camera_probe(ici, icd); } mutex_unlock(&list_lock); } /* * It is invalid to call v4l2_clk_enable() after a successful probing * asynchronously outside of V4L2 operations, i.e. with .host_lock not held. */ static int soc_camera_clk_enable(struct v4l2_clk *clk) { struct soc_camera_device *icd = clk->priv; struct soc_camera_host *ici; if (!icd || !icd->parent) return -ENODEV; ici = to_soc_camera_host(icd->parent); if (!try_module_get(ici->ops->owner)) return -ENODEV; /* * If a different client is currently being probed, the host will tell * you to go */ return soc_camera_clock_start(ici); } static void soc_camera_clk_disable(struct v4l2_clk *clk) { struct soc_camera_device *icd = clk->priv; struct soc_camera_host *ici; if (!icd || !icd->parent) return; ici = to_soc_camera_host(icd->parent); soc_camera_clock_stop(ici); module_put(ici->ops->owner); } /* * Eventually, it would be more logical to make the respective host the clock * owner, but then we would have to copy this struct for each ici. Besides, it * would introduce the circular dependency problem, unless we port all client * drivers to release the clock, when not in use. */ static const struct v4l2_clk_ops soc_camera_clk_ops = { .owner = THIS_MODULE, .enable = soc_camera_clk_enable, .disable = soc_camera_clk_disable, }; static int soc_camera_dyn_pdev(struct soc_camera_desc *sdesc, struct soc_camera_async_client *sasc) { struct platform_device *pdev; int ret, i; mutex_lock(&list_lock); i = find_first_zero_bit(device_map, MAP_MAX_NUM); if (i < MAP_MAX_NUM) set_bit(i, device_map); mutex_unlock(&list_lock); if (i >= MAP_MAX_NUM) return -ENOMEM; pdev = platform_device_alloc("soc-camera-pdrv", i); if (!pdev) return -ENOMEM; ret = platform_device_add_data(pdev, sdesc, sizeof(*sdesc)); if (ret < 0) { platform_device_put(pdev); return ret; } sasc->pdev = pdev; return 0; } static struct soc_camera_device *soc_camera_add_pdev(struct soc_camera_async_client *sasc) { struct platform_device *pdev = sasc->pdev; int ret; ret = platform_device_add(pdev); if (ret < 0 || !pdev->dev.driver) return NULL; return platform_get_drvdata(pdev); } /* Locking: called with .host_lock held */ static int soc_camera_probe_finish(struct soc_camera_device *icd) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct v4l2_subdev_format fmt = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; struct v4l2_mbus_framefmt *mf = &fmt.format; int ret; sd->grp_id = soc_camera_grp_id(icd); v4l2_set_subdev_hostdata(sd, icd); v4l2_subdev_call(sd, video, g_tvnorms, &icd->vdev->tvnorms); ret = v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler, NULL, true); if (ret < 0) return ret; ret = soc_camera_add_device(icd); if (ret < 0) { dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); return ret; } /* At this point client .probe() should have run already */ ret = soc_camera_init_user_formats(icd); if (ret < 0) goto eusrfmt; icd->field = V4L2_FIELD_ANY; 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, pad, get_fmt, NULL, &fmt)) { icd->user_width = mf->width; icd->user_height = mf->height; icd->colorspace = mf->colorspace; icd->field = mf->field; } soc_camera_remove_device(icd); return 0; evidstart: soc_camera_free_user_formats(icd); eusrfmt: soc_camera_remove_device(icd); return ret; } #ifdef CONFIG_I2C_BOARDINFO static int soc_camera_i2c_init(struct soc_camera_device *icd, struct soc_camera_desc *sdesc) { struct soc_camera_subdev_desc *ssdd; struct i2c_client *client; struct soc_camera_host *ici; struct soc_camera_host_desc *shd = &sdesc->host_desc; struct i2c_adapter *adap; struct v4l2_subdev *subdev; char clk_name[V4L2_CLK_NAME_SIZE]; int ret; /* First find out how we link the main client */ if (icd->sasc) { /* Async non-OF probing handled by the subdevice list */ return -EPROBE_DEFER; } ici = to_soc_camera_host(icd->parent); adap = i2c_get_adapter(shd->i2c_adapter_id); if (!adap) { dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n", shd->i2c_adapter_id); return -ENODEV; } ssdd = kmemdup(&sdesc->subdev_desc, sizeof(*ssdd), GFP_KERNEL); if (!ssdd) { ret = -ENOMEM; goto ealloc; } /* * In synchronous case we request regulators ourselves in * soc_camera_pdrv_probe(), make sure the subdevice driver doesn't try * to allocate them again. */ ssdd->sd_pdata.num_regulators = 0; ssdd->sd_pdata.regulators = NULL; shd->board_info->platform_data = ssdd; v4l2_clk_name_i2c(clk_name, sizeof(clk_name), shd->i2c_adapter_id, shd->board_info->addr); icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd); if (IS_ERR(icd->clk)) { ret = PTR_ERR(icd->clk); goto eclkreg; } subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, shd->board_info, NULL); if (!subdev) { ret = -ENODEV; goto ei2cnd; } client = v4l2_get_subdevdata(subdev); /* Use to_i2c_client(dev) to recover the i2c client */ icd->control = &client->dev; return 0; ei2cnd: v4l2_clk_unregister(icd->clk); icd->clk = NULL; eclkreg: kfree(ssdd); ealloc: i2c_put_adapter(adap); return ret; } static void soc_camera_i2c_free(struct soc_camera_device *icd) { struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); struct i2c_adapter *adap; struct soc_camera_subdev_desc *ssdd; icd->control = NULL; if (icd->sasc) return; adap = client->adapter; ssdd = client->dev.platform_data; v4l2_device_unregister_subdev(i2c_get_clientdata(client)); i2c_unregister_device(client); i2c_put_adapter(adap); kfree(ssdd); v4l2_clk_unregister(icd->clk); icd->clk = NULL; } /* * V4L2 asynchronous notifier callbacks. They are all called under a v4l2-async * internal global mutex, therefore cannot race against other asynchronous * events. Until notifier->complete() (soc_camera_async_complete()) is called, * the video device node is not registered and no V4L fops can occur. Unloading * of the host driver also calls a v4l2-async function, so also there we're * protected. */ static int soc_camera_async_bound(struct v4l2_async_notifier *notifier, struct v4l2_subdev *sd, struct v4l2_async_subdev *asd) { struct soc_camera_async_client *sasc = container_of(notifier, struct soc_camera_async_client, notifier); struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); if (asd == sasc->sensor && !WARN_ON(icd->control)) { struct i2c_client *client = v4l2_get_subdevdata(sd); /* * Only now we get subdevice-specific information like * regulators, flags, callbacks, etc. */ if (client) { struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); if (ssdd) { memcpy(&sdesc->subdev_desc, ssdd, sizeof(sdesc->subdev_desc)); if (ssdd->reset) ssdd->reset(&client->dev); } icd->control = &client->dev; } } return 0; } static void soc_camera_async_unbind(struct v4l2_async_notifier *notifier, struct v4l2_subdev *sd, struct v4l2_async_subdev *asd) { struct soc_camera_async_client *sasc = container_of(notifier, struct soc_camera_async_client, notifier); struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); icd->control = NULL; if (icd->clk) { v4l2_clk_unregister(icd->clk); icd->clk = NULL; } } static int soc_camera_async_complete(struct v4l2_async_notifier *notifier) { struct soc_camera_async_client *sasc = container_of(notifier, struct soc_camera_async_client, notifier); struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); if (to_soc_camera_control(icd)) { struct soc_camera_host *ici = to_soc_camera_host(icd->parent); int ret; mutex_lock(&list_lock); ret = soc_camera_probe(ici, icd); mutex_unlock(&list_lock); if (ret < 0) return ret; } return 0; } static const struct v4l2_async_notifier_operations soc_camera_async_ops = { .bound = soc_camera_async_bound, .unbind = soc_camera_async_unbind, .complete = soc_camera_async_complete, }; static int scan_async_group(struct soc_camera_host *ici, struct v4l2_async_subdev **asd, unsigned int size) { struct soc_camera_async_subdev *sasd; struct soc_camera_async_client *sasc; struct soc_camera_device *icd; struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,}; char clk_name[V4L2_CLK_NAME_SIZE]; unsigned int i; int ret; /* First look for a sensor */ for (i = 0; i < size; i++) { sasd = container_of(asd[i], struct soc_camera_async_subdev, asd); if (sasd->role == SOCAM_SUBDEV_DATA_SOURCE) break; } if (i >= size || asd[i]->match_type != V4L2_ASYNC_MATCH_I2C) { /* All useless */ dev_err(ici->v4l2_dev.dev, "No I2C data source found!\n"); return -ENODEV; } /* Or shall this be managed by the soc-camera device? */ sasc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sasc), GFP_KERNEL); if (!sasc) return -ENOMEM; /* HACK: just need a != NULL */ sdesc.host_desc.board_info = ERR_PTR(-ENODATA); ret = soc_camera_dyn_pdev(&sdesc, sasc); if (ret < 0) goto eallocpdev; sasc->sensor = &sasd->asd; icd = soc_camera_add_pdev(sasc); if (!icd) { ret = -ENOMEM; goto eaddpdev; } v4l2_async_notifier_init(&sasc->notifier); for (i = 0; i < size; i++) { ret = v4l2_async_notifier_add_subdev(&sasc->notifier, asd[i]); if (ret) goto eaddasd; } sasc->notifier.ops = &soc_camera_async_ops; icd->sasc = sasc; icd->parent = ici->v4l2_dev.dev; v4l2_clk_name_i2c(clk_name, sizeof(clk_name), sasd->asd.match.i2c.adapter_id, sasd->asd.match.i2c.address); icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd); if (IS_ERR(icd->clk)) { ret = PTR_ERR(icd->clk); goto eclkreg; } ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); if (!ret) return 0; v4l2_clk_unregister(icd->clk); eclkreg: icd->clk = NULL; eaddasd: v4l2_async_notifier_cleanup(&sasc->notifier); platform_device_del(sasc->pdev); eaddpdev: platform_device_put(sasc->pdev); eallocpdev: devm_kfree(ici->v4l2_dev.dev, sasc); dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret); return ret; } static void scan_async_host(struct soc_camera_host *ici) { struct v4l2_async_subdev **asd; int j; for (j = 0, asd = ici->asd; ici->asd_sizes[j]; j++) { scan_async_group(ici, asd, ici->asd_sizes[j]); asd += ici->asd_sizes[j]; } } #else #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) #define soc_camera_i2c_free(icd) do {} while (0) #define scan_async_host(ici) do {} while (0) #endif #ifdef CONFIG_OF struct soc_of_info { struct soc_camera_async_subdev sasd; struct soc_camera_async_client sasc; struct v4l2_async_subdev *subdev; }; static int soc_of_bind(struct soc_camera_host *ici, struct device_node *ep, struct device_node *remote) { struct soc_camera_device *icd; struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,}; struct soc_camera_async_client *sasc; struct soc_of_info *info; struct i2c_client *client; char clk_name[V4L2_CLK_NAME_SIZE]; int ret; /* allocate a new subdev and add match info to it */ info = devm_kzalloc(ici->v4l2_dev.dev, sizeof(struct soc_of_info), GFP_KERNEL); if (!info) return -ENOMEM; info->sasd.asd.match.fwnode = of_fwnode_handle(remote); info->sasd.asd.match_type = V4L2_ASYNC_MATCH_FWNODE; info->subdev = &info->sasd.asd; /* Or shall this be managed by the soc-camera device? */ sasc = &info->sasc; /* HACK: just need a != NULL */ sdesc.host_desc.board_info = ERR_PTR(-ENODATA); ret = soc_camera_dyn_pdev(&sdesc, sasc); if (ret < 0) goto eallocpdev; sasc->sensor = &info->sasd.asd; icd = soc_camera_add_pdev(sasc); if (!icd) { ret = -ENOMEM; goto eaddpdev; } v4l2_async_notifier_init(&sasc->notifier); ret = v4l2_async_notifier_add_subdev(&sasc->notifier, info->subdev); if (ret) { of_node_put(remote); goto eaddasd; } sasc->notifier.ops = &soc_camera_async_ops; icd->sasc = sasc; icd->parent = ici->v4l2_dev.dev; client = of_find_i2c_device_by_node(remote); if (client) v4l2_clk_name_i2c(clk_name, sizeof(clk_name), client->adapter->nr, client->addr); else v4l2_clk_name_of(clk_name, sizeof(clk_name), remote); icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd); if (IS_ERR(icd->clk)) { ret = PTR_ERR(icd->clk); goto eclkreg; } ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); if (!ret) return 0; v4l2_clk_unregister(icd->clk); eclkreg: icd->clk = NULL; eaddasd: v4l2_async_notifier_cleanup(&sasc->notifier); platform_device_del(sasc->pdev); eaddpdev: platform_device_put(sasc->pdev); eallocpdev: devm_kfree(ici->v4l2_dev.dev, info); dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret); return ret; } static void scan_of_host(struct soc_camera_host *ici) { struct device *dev = ici->v4l2_dev.dev; struct device_node *np = dev->of_node; struct device_node *epn = NULL, *rem; unsigned int i; for (i = 0; ; i++) { epn = of_graph_get_next_endpoint(np, epn); if (!epn) break; rem = of_graph_get_remote_port_parent(epn); if (!rem) { dev_notice(dev, "no remote for %pOF\n", epn); continue; } /* so we now have a remote node to connect */ if (!i) soc_of_bind(ici, epn, rem); if (i) { dev_err(dev, "multiple subdevices aren't supported yet!\n"); break; } } of_node_put(epn); } #else static inline void scan_of_host(struct soc_camera_host *ici) { } #endif /* Called during host-driver probe */ static int soc_camera_probe(struct soc_camera_host *ici, struct soc_camera_device *icd) { struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); struct soc_camera_host_desc *shd = &sdesc->host_desc; struct device *control = NULL; 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; /* Must have icd->vdev before registering the device */ ret = video_dev_create(icd); if (ret < 0) goto evdc; /* * ..._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 also during client probing. */ /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ if (shd->board_info) { ret = soc_camera_i2c_init(icd, sdesc); if (ret < 0 && ret != -EPROBE_DEFER) goto eadd; } else if (!shd->add_device || !shd->del_device) { ret = -EINVAL; goto eadd; } else { ret = soc_camera_clock_start(ici); if (ret < 0) goto eadd; if (shd->module_name) ret = request_module(shd->module_name); ret = shd->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)) { shd->del_device(icd); ret = -ENODEV; goto enodrv; } } mutex_lock(&ici->host_lock); ret = soc_camera_probe_finish(icd); mutex_unlock(&ici->host_lock); if (ret < 0) goto efinish; return 0; efinish: if (shd->board_info) { soc_camera_i2c_free(icd); } else { shd->del_device(icd); module_put(control->driver->owner); enodrv: eadddev: soc_camera_clock_stop(ici); } eadd: if (icd->vdev) { video_device_release(icd->vdev); icd->vdev = NULL; } evdc: 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. With * asynchronous client probing this can also be called without * soc_camera_probe_finish() having run. Careful with clean up. */ static int soc_camera_remove(struct soc_camera_device *icd) { struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); struct video_device *vdev = icd->vdev; v4l2_ctrl_handler_free(&icd->ctrl_handler); if (vdev) { video_unregister_device(vdev); icd->vdev = NULL; } if (sdesc->host_desc.board_info) { soc_camera_i2c_free(icd); } else { struct device *dev = to_soc_camera_control(icd); struct device_driver *drv = dev ? dev->driver : NULL; if (drv) { sdesc->host_desc.del_device(icd); module_put(drv->owner); } } if (icd->num_user_formats) soc_camera_free_user_formats(icd); if (icd->clk) { /* For the synchronous case */ v4l2_clk_unregister(icd->clk); icd->clk = NULL; } if (icd->sasc) platform_device_unregister(icd->sasc->pdev); return 0; } static int default_g_selection(struct soc_camera_device *icd, struct v4l2_selection *sel) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct v4l2_subdev_selection sdsel = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, .target = sel->target, }; int ret; ret = v4l2_subdev_call(sd, pad, get_selection, NULL, &sdsel); if (ret) return ret; sel->r = sdsel.r; return 0; } static int default_s_selection(struct soc_camera_device *icd, struct v4l2_selection *sel) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct v4l2_subdev_selection sdsel = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, .target = sel->target, .flags = sel->flags, .r = sel->r, }; int ret; ret = v4l2_subdev_call(sd, pad, set_selection, NULL, &sdsel); if (ret) return ret; sel->r = sdsel.r; return 0; } static int default_g_parm(struct soc_camera_device *icd, struct v4l2_streamparm *a) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); return v4l2_g_parm_cap(icd->vdev, sd, a); } static int default_s_parm(struct soc_camera_device *icd, struct v4l2_streamparm *a) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); return v4l2_s_parm_cap(icd->vdev, sd, a); } 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; struct v4l2_subdev_frame_size_enum fse = { .index = fsize->index, .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; xlate = soc_camera_xlate_by_fourcc(icd, fsize->pixel_format); if (!xlate) return -EINVAL; fse.code = xlate->code; ret = v4l2_subdev_call(sd, pad, enum_frame_size, NULL, &fse); if (ret < 0) return ret; if (fse.min_width == fse.max_width && fse.min_height == fse.max_height) { fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; fsize->discrete.width = fse.min_width; fsize->discrete.height = fse.min_height; return 0; } fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS; fsize->stepwise.min_width = fse.min_width; fsize->stepwise.max_width = fse.max_width; fsize->stepwise.min_height = fse.min_height; fsize->stepwise.max_height = fse.max_height; fsize->stepwise.step_width = 1; fsize->stepwise.step_height = 1; 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_videobuf2 || !ici->ops->poll || !ici->v4l2_dev.dev) return -EINVAL; if (!ici->ops->set_selection) ici->ops->set_selection = default_s_selection; if (!ici->ops->get_selection) ici->ops->get_selection = default_g_selection; 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); mutex_init(&ici->clk_lock); if (ici->v4l2_dev.dev->of_node) scan_of_host(ici); else if (ici->asd_sizes) /* * No OF, host with a list of subdevices. Don't try to mix * modes by initialising some groups statically and some * dynamically! */ scan_async_host(ici); else /* Legacy: static platform devices from board data */ 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, *tmp; struct soc_camera_async_client *sasc; LIST_HEAD(notifiers); mutex_lock(&list_lock); list_del(&ici->list); list_for_each_entry(icd, &devices, list) if (icd->iface == ici->nr && icd->sasc) { /* as long as we hold the device, sasc won't be freed */ get_device(icd->pdev); list_add(&icd->sasc->list, ¬ifiers); } mutex_unlock(&list_lock); list_for_each_entry(sasc, ¬ifiers, list) { /* Must call unlocked to avoid AB-BA dead-lock */ v4l2_async_notifier_unregister(&sasc->notifier); v4l2_async_notifier_cleanup(&sasc->notifier); put_device(&sasc->pdev->dev); } mutex_lock(&list_lock); list_for_each_entry_safe(icd, tmp, &devices, list) if (icd->iface == ici->nr) 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; mutex_lock(&list_lock); 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... */ mutex_unlock(&list_lock); return -ENOMEM; } icd->devnum = num; icd->use_count = 0; icd->host_priv = NULL; /* * Dynamically allocated devices set the bit earlier, but it doesn't hurt setting * it again */ i = to_platform_device(icd->pdev)->id; if (i < 0) /* One static (legacy) soc-camera platform device */ i = 0; if (i >= MAP_MAX_NUM) { mutex_unlock(&list_lock); return -EBUSY; } set_bit(i, device_map); list_add_tail(&icd->list, &devices); mutex_unlock(&list_lock); 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_expbuf = soc_camera_expbuf, .vidioc_streamon = soc_camera_streamon, .vidioc_streamoff = soc_camera_streamoff, .vidioc_g_selection = soc_camera_g_selection, .vidioc_s_selection = soc_camera_s_selection, .vidioc_g_parm = soc_camera_g_parm, .vidioc_s_parm = soc_camera_s_parm, }; 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; strscpy(vdev->name, ici->drv_name, sizeof(vdev->name)); vdev->v4l2_dev = &ici->v4l2_dev; vdev->fops = &soc_camera_fops; vdev->ioctl_ops = &soc_camera_ioctl_ops; vdev->release = video_device_release; vdev->ctrl_handler = &icd->ctrl_handler; vdev->lock = &ici->host_lock; icd->vdev = vdev; return 0; } /* * Called from soc_camera_probe() above with .host_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; video_set_drvdata(icd->vdev, icd); if (icd->vdev->tvnorms == 0) { /* disable the STD API if there are no tvnorms defined */ v4l2_disable_ioctl(icd->vdev, VIDIOC_G_STD); v4l2_disable_ioctl(icd->vdev, VIDIOC_S_STD); v4l2_disable_ioctl(icd->vdev, VIDIOC_ENUMSTD); } 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 soc_camera_pdrv_probe(struct platform_device *pdev) { struct soc_camera_desc *sdesc = pdev->dev.platform_data; struct soc_camera_subdev_desc *ssdd = &sdesc->subdev_desc; struct soc_camera_device *icd; int ret; if (!sdesc) return -EINVAL; icd = devm_kzalloc(&pdev->dev, sizeof(*icd), GFP_KERNEL); if (!icd) return -ENOMEM; /* * In the asynchronous case ssdd->num_regulators == 0 yet, so, the below * regulator allocation is a dummy. They are actually requested by the * subdevice driver, using soc_camera_power_init(). Also note, that in * that case regulators are attached to the I2C device and not to the * camera platform device. */ ret = devm_regulator_bulk_get(&pdev->dev, ssdd->sd_pdata.num_regulators, ssdd->sd_pdata.regulators); if (ret < 0) return ret; icd->iface = sdesc->host_desc.bus_id; icd->sdesc = sdesc; icd->pdev = &pdev->dev; platform_set_drvdata(pdev, icd); icd->user_width = DEFAULT_WIDTH; icd->user_height = DEFAULT_HEIGHT; return soc_camera_device_register(icd); } /* * 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 soc_camera_pdrv_remove(struct platform_device *pdev) { struct soc_camera_device *icd = platform_get_drvdata(pdev); int i; if (!icd) return -EINVAL; i = pdev->id; if (i < 0) i = 0; /* * In synchronous mode with static platform devices this is called in a * loop from drivers/base/dd.c::driver_detach(), no parallel execution, * no need to lock. In asynchronous case the caller - * soc_camera_host_unregister() - already holds the lock */ if (test_bit(i, device_map)) { clear_bit(i, device_map); list_del(&icd->list); } return 0; } static struct platform_driver __refdata soc_camera_pdrv = { .probe = soc_camera_pdrv_probe, .remove = soc_camera_pdrv_remove, .driver = { .name = "soc-camera-pdrv", }, }; module_platform_driver(soc_camera_pdrv); MODULE_DESCRIPTION("Image capture bus driver"); MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:soc-camera-pdrv");
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