/* * S5P/EXYNOS4 SoC series camera host interface media device driver * * Copyright (C) 2011 Samsung Electronics Co., Ltd. * Contact: Sylwester Nawrocki, * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation, either version 2 of the License, * or (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fimc-core.h" #include "fimc-lite.h" #include "fimc-mdevice.h" #include "mipi-csis.h" static int __fimc_md_set_camclk(struct fimc_md *fmd, struct fimc_sensor_info *s_info, bool on); /** * fimc_pipeline_prepare - update pipeline information with subdevice pointers * @fimc: fimc device terminating the pipeline * * Caller holds the graph mutex. */ static void fimc_pipeline_prepare(struct fimc_pipeline *p, struct media_entity *me) { struct media_pad *pad = &me->pads[0]; struct v4l2_subdev *sd; int i; for (i = 0; i < IDX_MAX; i++) p->subdevs[i] = NULL; while (1) { if (!(pad->flags & MEDIA_PAD_FL_SINK)) break; /* source pad */ pad = media_entity_remote_source(pad); if (pad == NULL || media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) break; sd = media_entity_to_v4l2_subdev(pad->entity); switch (sd->grp_id) { case GRP_ID_FIMC_IS_SENSOR: case GRP_ID_SENSOR: p->subdevs[IDX_SENSOR] = sd; break; case GRP_ID_CSIS: p->subdevs[IDX_CSIS] = sd; break; case GRP_ID_FLITE: p->subdevs[IDX_FLITE] = sd; break; case GRP_ID_FIMC: /* No need to control FIMC subdev through subdev ops */ break; default: pr_warn("%s: Unknown subdev grp_id: %#x\n", __func__, sd->grp_id); } /* sink pad */ pad = &sd->entity.pads[0]; } } /** * __subdev_set_power - change power state of a single subdev * @sd: subdevice to change power state for * @on: 1 to enable power or 0 to disable * * Return result of s_power subdev operation or -ENXIO if sd argument * is NULL. Return 0 if the subdevice does not implement s_power. */ static int __subdev_set_power(struct v4l2_subdev *sd, int on) { int *use_count; int ret; if (sd == NULL) return -ENXIO; use_count = &sd->entity.use_count; if (on && (*use_count)++ > 0) return 0; else if (!on && (*use_count == 0 || --(*use_count) > 0)) return 0; ret = v4l2_subdev_call(sd, core, s_power, on); return ret != -ENOIOCTLCMD ? ret : 0; } /** * fimc_pipeline_s_power - change power state of all pipeline subdevs * @fimc: fimc device terminating the pipeline * @state: true to power on, false to power off * * Needs to be called with the graph mutex held. */ static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool state) { unsigned int i; int ret; if (p->subdevs[IDX_SENSOR] == NULL) return -ENXIO; for (i = 0; i < IDX_MAX; i++) { unsigned int idx = state ? (IDX_MAX - 1) - i : i; ret = __subdev_set_power(p->subdevs[idx], state); if (ret < 0 && ret != -ENXIO) return ret; } return 0; } /** * __fimc_pipeline_open - update the pipeline information, enable power * of all pipeline subdevs and the sensor clock * @me: media entity to start graph walk with * @prep: true to acquire sensor (and csis) subdevs * * Called with the graph mutex held. */ static int __fimc_pipeline_open(struct fimc_pipeline *p, struct media_entity *me, bool prep) { int ret; if (prep) fimc_pipeline_prepare(p, me); if (p->subdevs[IDX_SENSOR] == NULL) return -EINVAL; ret = fimc_md_set_camclk(p->subdevs[IDX_SENSOR], true); if (ret) return ret; return fimc_pipeline_s_power(p, 1); } /** * __fimc_pipeline_close - disable the sensor clock and pipeline power * @fimc: fimc device terminating the pipeline * * Disable power of all subdevs and turn the external sensor clock off. */ static int __fimc_pipeline_close(struct fimc_pipeline *p) { int ret = 0; if (!p || !p->subdevs[IDX_SENSOR]) return -EINVAL; if (p->subdevs[IDX_SENSOR]) { ret = fimc_pipeline_s_power(p, 0); fimc_md_set_camclk(p->subdevs[IDX_SENSOR], false); } return ret == -ENXIO ? 0 : ret; } /** * __fimc_pipeline_s_stream - invoke s_stream on pipeline subdevs * @pipeline: video pipeline structure * @on: passed as the s_stream call argument */ static int __fimc_pipeline_s_stream(struct fimc_pipeline *p, bool on) { int i, ret; if (p->subdevs[IDX_SENSOR] == NULL) return -ENODEV; for (i = 0; i < IDX_MAX; i++) { unsigned int idx = on ? (IDX_MAX - 1) - i : i; ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) return ret; } return 0; } /* Media pipeline operations for the FIMC/FIMC-LITE video device driver */ static const struct fimc_pipeline_ops fimc_pipeline_ops = { .open = __fimc_pipeline_open, .close = __fimc_pipeline_close, .set_stream = __fimc_pipeline_s_stream, }; /* * Sensor subdevice helper functions */ static struct v4l2_subdev *fimc_md_register_sensor(struct fimc_md *fmd, struct fimc_sensor_info *s_info) { struct i2c_adapter *adapter; struct v4l2_subdev *sd = NULL; if (!s_info || !fmd) return NULL; adapter = i2c_get_adapter(s_info->pdata.i2c_bus_num); if (!adapter) { v4l2_warn(&fmd->v4l2_dev, "Failed to get I2C adapter %d, deferring probe\n", s_info->pdata.i2c_bus_num); return ERR_PTR(-EPROBE_DEFER); } sd = v4l2_i2c_new_subdev_board(&fmd->v4l2_dev, adapter, s_info->pdata.board_info, NULL); if (IS_ERR_OR_NULL(sd)) { i2c_put_adapter(adapter); v4l2_warn(&fmd->v4l2_dev, "Failed to acquire subdev %s, deferring probe\n", s_info->pdata.board_info->type); return ERR_PTR(-EPROBE_DEFER); } v4l2_set_subdev_hostdata(sd, s_info); sd->grp_id = GRP_ID_SENSOR; v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice %s\n", s_info->pdata.board_info->type); return sd; } static void fimc_md_unregister_sensor(struct v4l2_subdev *sd) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct i2c_adapter *adapter; if (!client) return; v4l2_device_unregister_subdev(sd); adapter = client->adapter; i2c_unregister_device(client); if (adapter) i2c_put_adapter(adapter); } static int fimc_md_register_sensor_entities(struct fimc_md *fmd) { struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data; struct fimc_dev *fd = NULL; int num_clients, ret, i; /* * Runtime resume one of the FIMC entities to make sure * the sclk_cam clocks are not globally disabled. */ for (i = 0; !fd && i < ARRAY_SIZE(fmd->fimc); i++) if (fmd->fimc[i]) fd = fmd->fimc[i]; if (!fd) return -ENXIO; ret = pm_runtime_get_sync(&fd->pdev->dev); if (ret < 0) return ret; WARN_ON(pdata->num_clients > ARRAY_SIZE(fmd->sensor)); num_clients = min_t(u32, pdata->num_clients, ARRAY_SIZE(fmd->sensor)); fmd->num_sensors = num_clients; for (i = 0; i < num_clients; i++) { struct v4l2_subdev *sd; fmd->sensor[i].pdata = pdata->isp_info[i]; ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], true); if (ret) break; sd = fimc_md_register_sensor(fmd, &fmd->sensor[i]); ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], false); if (!IS_ERR(sd)) { fmd->sensor[i].subdev = sd; } else { fmd->sensor[i].subdev = NULL; ret = PTR_ERR(sd); break; } if (ret) break; } pm_runtime_put(&fd->pdev->dev); return ret; } /* * MIPI CSIS and FIMC platform devices registration. */ static int fimc_register_callback(struct device *dev, void *p) { struct fimc_dev *fimc = dev_get_drvdata(dev); struct v4l2_subdev *sd; struct fimc_md *fmd = p; int ret; if (fimc == NULL || fimc->id >= FIMC_MAX_DEVS) return 0; sd = &fimc->vid_cap.subdev; sd->grp_id = GRP_ID_FIMC; v4l2_set_subdev_hostdata(sd, (void *)&fimc_pipeline_ops); ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); if (ret) { v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n", fimc->id, ret); return ret; } fmd->fimc[fimc->id] = fimc; return 0; } static int fimc_lite_register_callback(struct device *dev, void *p) { struct fimc_lite *fimc = dev_get_drvdata(dev); struct fimc_md *fmd = p; int ret; if (fimc == NULL || fimc->index >= FIMC_LITE_MAX_DEVS) return 0; fimc->subdev.grp_id = GRP_ID_FLITE; v4l2_set_subdev_hostdata(&fimc->subdev, (void *)&fimc_pipeline_ops); ret = v4l2_device_register_subdev(&fmd->v4l2_dev, &fimc->subdev); if (ret) { v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC-LITE.%d (%d)\n", fimc->index, ret); return ret; } fmd->fimc_lite[fimc->index] = fimc; return 0; } static int csis_register_callback(struct device *dev, void *p) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct platform_device *pdev; struct fimc_md *fmd = p; int id, ret; if (!sd) return 0; pdev = v4l2_get_subdevdata(sd); if (!pdev || pdev->id < 0 || pdev->id >= CSIS_MAX_ENTITIES) return 0; v4l2_info(sd, "csis%d sd: %s\n", pdev->id, sd->name); id = pdev->id < 0 ? 0 : pdev->id; sd->grp_id = GRP_ID_CSIS; ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); if (!ret) fmd->csis[id].sd = sd; else v4l2_err(&fmd->v4l2_dev, "Failed to register CSIS subdevice: %d\n", ret); return ret; } /** * fimc_md_register_platform_entities - register FIMC and CSIS media entities */ static int fimc_md_register_platform_entities(struct fimc_md *fmd) { struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data; struct device_driver *driver; int ret, i; driver = driver_find(FIMC_MODULE_NAME, &platform_bus_type); if (!driver) { v4l2_warn(&fmd->v4l2_dev, "%s driver not found, deffering probe\n", FIMC_MODULE_NAME); return -EPROBE_DEFER; } ret = driver_for_each_device(driver, NULL, fmd, fimc_register_callback); if (ret) return ret; driver = driver_find(FIMC_LITE_DRV_NAME, &platform_bus_type); if (driver && try_module_get(driver->owner)) { ret = driver_for_each_device(driver, NULL, fmd, fimc_lite_register_callback); if (ret) return ret; module_put(driver->owner); } /* * Check if there is any sensor on the MIPI-CSI2 bus and * if not skip the s5p-csis module loading. */ if (pdata == NULL) return 0; for (i = 0; i < pdata->num_clients; i++) { if (pdata->isp_info[i].bus_type == FIMC_MIPI_CSI2) { ret = 1; break; } } if (!ret) return 0; driver = driver_find(CSIS_DRIVER_NAME, &platform_bus_type); if (!driver || !try_module_get(driver->owner)) { v4l2_warn(&fmd->v4l2_dev, "%s driver not found, deffering probe\n", CSIS_DRIVER_NAME); return -EPROBE_DEFER; } return driver_for_each_device(driver, NULL, fmd, csis_register_callback); } static void fimc_md_unregister_entities(struct fimc_md *fmd) { int i; for (i = 0; i < FIMC_MAX_DEVS; i++) { if (fmd->fimc[i] == NULL) continue; v4l2_device_unregister_subdev(&fmd->fimc[i]->vid_cap.subdev); fmd->fimc[i]->pipeline_ops = NULL; fmd->fimc[i] = NULL; } for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { if (fmd->fimc_lite[i] == NULL) continue; v4l2_device_unregister_subdev(&fmd->fimc_lite[i]->subdev); fmd->fimc[i]->pipeline_ops = NULL; fmd->fimc_lite[i] = NULL; } for (i = 0; i < CSIS_MAX_ENTITIES; i++) { if (fmd->csis[i].sd == NULL) continue; v4l2_device_unregister_subdev(fmd->csis[i].sd); module_put(fmd->csis[i].sd->owner); fmd->csis[i].sd = NULL; } for (i = 0; i < fmd->num_sensors; i++) { if (fmd->sensor[i].subdev == NULL) continue; fimc_md_unregister_sensor(fmd->sensor[i].subdev); fmd->sensor[i].subdev = NULL; } } /** * __fimc_md_create_fimc_links - create links to all FIMC entities * @fmd: fimc media device * @source: the source entity to create links to all fimc entities from * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null * @pad: the source entity pad index * @link_mask: bitmask of the fimc devices for which link should be enabled */ static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd, struct media_entity *source, struct v4l2_subdev *sensor, int pad, int link_mask) { struct fimc_sensor_info *s_info; struct media_entity *sink; unsigned int flags = 0; int ret, i; for (i = 0; i < FIMC_MAX_DEVS; i++) { if (!fmd->fimc[i]) continue; /* * Some FIMC variants are not fitted with camera capture * interface. Skip creating a link from sensor for those. */ if (!fmd->fimc[i]->variant->has_cam_if) continue; flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0; sink = &fmd->fimc[i]->vid_cap.subdev.entity; ret = media_entity_create_link(source, pad, sink, FIMC_SD_PAD_SINK, flags); if (ret) return ret; /* Notify FIMC capture subdev entity */ ret = media_entity_call(sink, link_setup, &sink->pads[0], &source->pads[pad], flags); if (ret) break; v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n", source->name, flags ? '=' : '-', sink->name); if (flags == 0 || sensor == NULL) continue; s_info = v4l2_get_subdev_hostdata(sensor); if (!WARN_ON(s_info == NULL)) { unsigned long irq_flags; spin_lock_irqsave(&fmd->slock, irq_flags); s_info->host = fmd->fimc[i]; spin_unlock_irqrestore(&fmd->slock, irq_flags); } } for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { if (!fmd->fimc_lite[i]) continue; if (link_mask & (1 << (i + FIMC_MAX_DEVS))) flags = MEDIA_LNK_FL_ENABLED; else flags = 0; sink = &fmd->fimc_lite[i]->subdev.entity; ret = media_entity_create_link(source, pad, sink, FLITE_SD_PAD_SINK, flags); if (ret) return ret; /* Notify FIMC-LITE subdev entity */ ret = media_entity_call(sink, link_setup, &sink->pads[0], &source->pads[pad], flags); if (ret) break; v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]", source->name, flags ? '=' : '-', sink->name); } return 0; } /* Create links from FIMC-LITE source pads to other entities */ static int __fimc_md_create_flite_source_links(struct fimc_md *fmd) { struct media_entity *source, *sink; unsigned int flags = MEDIA_LNK_FL_ENABLED; int i, ret = 0; for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { struct fimc_lite *fimc = fmd->fimc_lite[i]; if (fimc == NULL) continue; source = &fimc->subdev.entity; sink = &fimc->vfd.entity; /* FIMC-LITE's subdev and video node */ ret = media_entity_create_link(source, FLITE_SD_PAD_SOURCE_DMA, sink, 0, flags); if (ret) break; /* TODO: create links to other entities */ } return ret; } /** * fimc_md_create_links - create default links between registered entities * * Parallel interface sensor entities are connected directly to FIMC capture * entities. The sensors using MIPI CSIS bus are connected through immutable * link with CSI receiver entity specified by mux_id. Any registered CSIS * entity has a link to each registered FIMC capture entity. Enabled links * are created by default between each subsequent registered sensor and * subsequent FIMC capture entity. The number of default active links is * determined by the number of available sensors or FIMC entities, * whichever is less. */ static int fimc_md_create_links(struct fimc_md *fmd) { struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL }; struct v4l2_subdev *sensor, *csis; struct s5p_fimc_isp_info *pdata; struct fimc_sensor_info *s_info; struct media_entity *source, *sink; int i, pad, fimc_id = 0, ret = 0; u32 flags, link_mask = 0; for (i = 0; i < fmd->num_sensors; i++) { if (fmd->sensor[i].subdev == NULL) continue; sensor = fmd->sensor[i].subdev; s_info = v4l2_get_subdev_hostdata(sensor); if (!s_info) continue; source = NULL; pdata = &s_info->pdata; switch (pdata->bus_type) { case FIMC_MIPI_CSI2: if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES, "Wrong CSI channel id: %d\n", pdata->mux_id)) return -EINVAL; csis = fmd->csis[pdata->mux_id].sd; if (WARN(csis == NULL, "MIPI-CSI interface specified " "but s5p-csis module is not loaded!\n")) return -EINVAL; pad = sensor->entity.num_pads - 1; ret = media_entity_create_link(&sensor->entity, pad, &csis->entity, CSIS_PAD_SINK, MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED); if (ret) return ret; v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]", sensor->entity.name, csis->entity.name); source = NULL; csi_sensors[pdata->mux_id] = sensor; break; case FIMC_ITU_601...FIMC_ITU_656: source = &sensor->entity; pad = 0; break; default: v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n", pdata->bus_type); return -EINVAL; } if (source == NULL) continue; link_mask = 1 << fimc_id++; ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor, pad, link_mask); } for (i = 0; i < CSIS_MAX_ENTITIES; i++) { if (fmd->csis[i].sd == NULL) continue; source = &fmd->csis[i].sd->entity; pad = CSIS_PAD_SOURCE; sensor = csi_sensors[i]; link_mask = 1 << fimc_id++; ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor, pad, link_mask); } /* Create immutable links between each FIMC's subdev and video node */ flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED; for (i = 0; i < FIMC_MAX_DEVS; i++) { if (!fmd->fimc[i]) continue; source = &fmd->fimc[i]->vid_cap.subdev.entity; sink = &fmd->fimc[i]->vid_cap.vfd.entity; ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE, sink, 0, flags); if (ret) break; } return __fimc_md_create_flite_source_links(fmd); } /* * The peripheral sensor clock management. */ static int fimc_md_get_clocks(struct fimc_md *fmd) { char clk_name[32]; struct clk *clock; int i; for (i = 0; i < FIMC_MAX_CAMCLKS; i++) { snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i); clock = clk_get(NULL, clk_name); if (IS_ERR(clock)) { v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s", clk_name); return -ENXIO; } fmd->camclk[i].clock = clock; } return 0; } static void fimc_md_put_clocks(struct fimc_md *fmd) { int i = FIMC_MAX_CAMCLKS; while (--i >= 0) { if (IS_ERR_OR_NULL(fmd->camclk[i].clock)) continue; clk_put(fmd->camclk[i].clock); fmd->camclk[i].clock = NULL; } } static int __fimc_md_set_camclk(struct fimc_md *fmd, struct fimc_sensor_info *s_info, bool on) { struct s5p_fimc_isp_info *pdata = &s_info->pdata; struct fimc_camclk_info *camclk; int ret = 0; if (WARN_ON(pdata->clk_id >= FIMC_MAX_CAMCLKS) || fmd == NULL) return -EINVAL; camclk = &fmd->camclk[pdata->clk_id]; dbg("camclk %d, f: %lu, use_count: %d, on: %d", pdata->clk_id, pdata->clk_frequency, camclk->use_count, on); if (on) { if (camclk->use_count > 0 && camclk->frequency != pdata->clk_frequency) return -EINVAL; if (camclk->use_count++ == 0) { clk_set_rate(camclk->clock, pdata->clk_frequency); camclk->frequency = pdata->clk_frequency; ret = clk_enable(camclk->clock); dbg("Enabled camclk %d: f: %lu", pdata->clk_id, clk_get_rate(camclk->clock)); } return ret; } if (WARN_ON(camclk->use_count == 0)) return 0; if (--camclk->use_count == 0) { clk_disable(camclk->clock); dbg("Disabled camclk %d", pdata->clk_id); } return ret; } /** * fimc_md_set_camclk - peripheral sensor clock setup * @sd: sensor subdev to configure sclk_cam clock for * @on: 1 to enable or 0 to disable the clock * * There are 2 separate clock outputs available in the SoC for external * image processors. These clocks are shared between all registered FIMC * devices to which sensors can be attached, either directly or through * the MIPI CSI receiver. The clock is allowed here to be used by * multiple sensors concurrently if they use same frequency. * This function should only be called when the graph mutex is held. */ int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on) { struct fimc_sensor_info *s_info = v4l2_get_subdev_hostdata(sd); struct fimc_md *fmd = entity_to_fimc_mdev(&sd->entity); return __fimc_md_set_camclk(fmd, s_info, on); } static int fimc_md_link_notify(struct media_pad *source, struct media_pad *sink, u32 flags) { struct fimc_lite *fimc_lite = NULL; struct fimc_dev *fimc = NULL; struct fimc_pipeline *pipeline; struct v4l2_subdev *sd; struct mutex *lock; int ret = 0; int ref_count; if (media_entity_type(sink->entity) != MEDIA_ENT_T_V4L2_SUBDEV) return 0; sd = media_entity_to_v4l2_subdev(sink->entity); switch (sd->grp_id) { case GRP_ID_FLITE: fimc_lite = v4l2_get_subdevdata(sd); if (WARN_ON(fimc_lite == NULL)) return 0; pipeline = &fimc_lite->pipeline; lock = &fimc_lite->lock; break; case GRP_ID_FIMC: fimc = v4l2_get_subdevdata(sd); if (WARN_ON(fimc == NULL)) return 0; pipeline = &fimc->pipeline; lock = &fimc->lock; break; default: return 0; } if (!(flags & MEDIA_LNK_FL_ENABLED)) { int i; mutex_lock(lock); ret = __fimc_pipeline_close(pipeline); for (i = 0; i < IDX_MAX; i++) pipeline->subdevs[i] = NULL; if (fimc) fimc_ctrls_delete(fimc->vid_cap.ctx); mutex_unlock(lock); return ret; } /* * Link activation. Enable power of pipeline elements only if the * pipeline is already in use, i.e. its video node is opened. * Recreate the controls destroyed during the link deactivation. */ mutex_lock(lock); ref_count = fimc ? fimc->vid_cap.refcnt : fimc_lite->ref_count; if (ref_count > 0) ret = __fimc_pipeline_open(pipeline, source->entity, true); if (!ret && fimc) ret = fimc_capture_ctrls_create(fimc); mutex_unlock(lock); return ret ? -EPIPE : ret; } static ssize_t fimc_md_sysfs_show(struct device *dev, struct device_attribute *attr, char *buf) { struct platform_device *pdev = to_platform_device(dev); struct fimc_md *fmd = platform_get_drvdata(pdev); if (fmd->user_subdev_api) return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE); return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE); } static ssize_t fimc_md_sysfs_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct platform_device *pdev = to_platform_device(dev); struct fimc_md *fmd = platform_get_drvdata(pdev); bool subdev_api; int i; if (!strcmp(buf, "vid-dev\n")) subdev_api = false; else if (!strcmp(buf, "sub-dev\n")) subdev_api = true; else return count; fmd->user_subdev_api = subdev_api; for (i = 0; i < FIMC_MAX_DEVS; i++) if (fmd->fimc[i]) fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api; return count; } /* * This device attribute is to select video pipeline configuration method. * There are following valid values: * vid-dev - for V4L2 video node API only, subdevice will be configured * by the host driver. * sub-dev - for media controller API, subdevs must be configured in user * space before starting streaming. */ static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO, fimc_md_sysfs_show, fimc_md_sysfs_store); static int fimc_md_probe(struct platform_device *pdev) { struct v4l2_device *v4l2_dev; struct fimc_md *fmd; int ret; fmd = devm_kzalloc(&pdev->dev, sizeof(*fmd), GFP_KERNEL); if (!fmd) return -ENOMEM; spin_lock_init(&fmd->slock); fmd->pdev = pdev; strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC", sizeof(fmd->media_dev.model)); fmd->media_dev.link_notify = fimc_md_link_notify; fmd->media_dev.dev = &pdev->dev; v4l2_dev = &fmd->v4l2_dev; v4l2_dev->mdev = &fmd->media_dev; v4l2_dev->notify = fimc_sensor_notify; snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "%s", dev_name(&pdev->dev)); ret = v4l2_device_register(&pdev->dev, &fmd->v4l2_dev); if (ret < 0) { v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret); return ret; } ret = media_device_register(&fmd->media_dev); if (ret < 0) { v4l2_err(v4l2_dev, "Failed to register media device: %d\n", ret); goto err_md; } ret = fimc_md_get_clocks(fmd); if (ret) goto err_clk; fmd->user_subdev_api = false; /* Protect the media graph while we're registering entities */ mutex_lock(&fmd->media_dev.graph_mutex); ret = fimc_md_register_platform_entities(fmd); if (ret) goto err_unlock; if (pdev->dev.platform_data) { ret = fimc_md_register_sensor_entities(fmd); if (ret) goto err_unlock; } ret = fimc_md_create_links(fmd); if (ret) goto err_unlock; ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev); if (ret) goto err_unlock; ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode); if (ret) goto err_unlock; platform_set_drvdata(pdev, fmd); mutex_unlock(&fmd->media_dev.graph_mutex); return 0; err_unlock: mutex_unlock(&fmd->media_dev.graph_mutex); err_clk: media_device_unregister(&fmd->media_dev); fimc_md_put_clocks(fmd); fimc_md_unregister_entities(fmd); err_md: v4l2_device_unregister(&fmd->v4l2_dev); return ret; } static int fimc_md_remove(struct platform_device *pdev) { struct fimc_md *fmd = platform_get_drvdata(pdev); if (!fmd) return 0; device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode); fimc_md_unregister_entities(fmd); media_device_unregister(&fmd->media_dev); fimc_md_put_clocks(fmd); return 0; } static struct platform_driver fimc_md_driver = { .probe = fimc_md_probe, .remove = fimc_md_remove, .driver = { .name = "s5p-fimc-md", .owner = THIS_MODULE, } }; static int __init fimc_md_init(void) { int ret; request_module("s5p-csis"); ret = fimc_register_driver(); if (ret) return ret; return platform_driver_register(&fimc_md_driver); } static void __exit fimc_md_exit(void) { platform_driver_unregister(&fimc_md_driver); fimc_unregister_driver(); } module_init(fimc_md_init); module_exit(fimc_md_exit); MODULE_AUTHOR("Sylwester Nawrocki "); MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver"); MODULE_LICENSE("GPL"); MODULE_VERSION("2.0.1");