--- /dev/null
+/*
+ * S5P/EXYNOS4 SoC series camera host interface media device driver
+ *
+ * Copyright (C) 2011 Samsung Electronics Co., Ltd.
+ * Contact: Sylwester Nawrocki, <s.nawrocki@samsung.com>
+ *
+ * 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 <linux/bug.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <media/media-device.h>
+
+#include "fimc-core.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.
+ */
+void fimc_pipeline_prepare(struct fimc_dev *fimc, struct media_entity *me)
+{
+ struct media_entity_graph graph;
+ struct v4l2_subdev *sd;
+
+ media_entity_graph_walk_start(&graph, me);
+
+ while ((me = media_entity_graph_walk_next(&graph))) {
+ if (media_entity_type(me) != MEDIA_ENT_T_V4L2_SUBDEV)
+ continue;
+ sd = media_entity_to_v4l2_subdev(me);
+
+ if (sd->grp_id == SENSOR_GROUP_ID)
+ fimc->pipeline.sensor = sd;
+ else if (sd->grp_id == CSIS_GROUP_ID)
+ fimc->pipeline.csis = sd;
+ }
+}
+
+/**
+ * __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: 1 to enable power or 0 for power down
+ *
+ * Need to be called with the graph mutex held.
+ */
+int fimc_pipeline_s_power(struct fimc_dev *fimc, int state)
+{
+ int ret = 0;
+
+ if (fimc->pipeline.sensor == NULL)
+ return -ENXIO;
+
+ if (state) {
+ ret = __subdev_set_power(fimc->pipeline.csis, 1);
+ if (ret && ret != -ENXIO)
+ return ret;
+ return __subdev_set_power(fimc->pipeline.sensor, 1);
+ }
+
+ ret = __subdev_set_power(fimc->pipeline.sensor, 0);
+ if (ret)
+ return ret;
+ ret = __subdev_set_power(fimc->pipeline.csis, 0);
+
+ return ret == -ENXIO ? 0 : ret;
+}
+
+/**
+ * __fimc_pipeline_initialize - 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
+ *
+ * This function must be called with the graph mutex held.
+ */
+static int __fimc_pipeline_initialize(struct fimc_dev *fimc,
+ struct media_entity *me, bool prep)
+{
+ int ret;
+
+ if (prep)
+ fimc_pipeline_prepare(fimc, me);
+ if (fimc->pipeline.sensor == NULL)
+ return -EINVAL;
+ ret = fimc_md_set_camclk(fimc->pipeline.sensor, true);
+ if (ret)
+ return ret;
+ return fimc_pipeline_s_power(fimc, 1);
+}
+
+int fimc_pipeline_initialize(struct fimc_dev *fimc, struct media_entity *me,
+ bool prep)
+{
+ int ret;
+
+ mutex_lock(&me->parent->graph_mutex);
+ ret = __fimc_pipeline_initialize(fimc, me, prep);
+ mutex_unlock(&me->parent->graph_mutex);
+
+ return ret;
+}
+
+/**
+ * __fimc_pipeline_shutdown - disable the sensor clock and pipeline power
+ * @fimc: fimc device terminating the pipeline
+ *
+ * Disable power of all subdevs in the pipeline and turn off the external
+ * sensor clock.
+ * Called with the graph mutex held.
+ */
+int __fimc_pipeline_shutdown(struct fimc_dev *fimc)
+{
+ int ret = 0;
+
+ if (fimc->pipeline.sensor) {
+ ret = fimc_pipeline_s_power(fimc, 0);
+ fimc_md_set_camclk(fimc->pipeline.sensor, false);
+ }
+ return ret == -ENXIO ? 0 : ret;
+}
+
+int fimc_pipeline_shutdown(struct fimc_dev *fimc)
+{
+ struct media_entity *me = &fimc->vid_cap.vfd->entity;
+ int ret;
+
+ mutex_lock(&me->parent->graph_mutex);
+ ret = __fimc_pipeline_shutdown(fimc);
+ mutex_unlock(&me->parent->graph_mutex);
+
+ return ret;
+}
+
+/**
+ * fimc_pipeline_s_stream - invoke s_stream on pipeline subdevs
+ * @fimc: fimc device terminating the pipeline
+ * @on: passed as the s_stream call argument
+ */
+int fimc_pipeline_s_stream(struct fimc_dev *fimc, int on)
+{
+ struct fimc_pipeline *p = &fimc->pipeline;
+ int ret = 0;
+
+ if (p->sensor == NULL)
+ return -ENODEV;
+
+ if ((on && p->csis) || !on)
+ ret = v4l2_subdev_call(on ? p->csis : p->sensor,
+ video, s_stream, on);
+ if (ret && ret != -ENOIOCTLCMD)
+ return ret;
+ if ((!on && p->csis) || on)
+ ret = v4l2_subdev_call(on ? p->sensor : p->csis,
+ video, s_stream, on);
+ return ret == -ENOIOCTLCMD ? 0 : ret;
+}
+
+/*
+ * 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)
+ return NULL;
+ sd = v4l2_i2c_new_subdev_board(&fmd->v4l2_dev, adapter,
+ s_info->pdata->board_info, NULL);
+ if (IS_ERR_OR_NULL(sd)) {
+ v4l2_err(&fmd->v4l2_dev, "Failed to acquire subdev\n");
+ return NULL;
+ }
+ v4l2_set_subdev_hostdata(sd, s_info);
+ sd->grp_id = SENSOR_GROUP_ID;
+
+ 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);
+
+ if (!client)
+ return;
+ v4l2_device_unregister_subdev(sd);
+ i2c_unregister_device(client);
+ i2c_put_adapter(client->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++) {
+ fmd->sensor[i].pdata = &pdata->isp_info[i];
+ ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], true);
+ if (ret)
+ break;
+ fmd->sensor[i].subdev =
+ fimc_md_register_sensor(fmd, &fmd->sensor[i]);
+ ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], false);
+ 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 fimc_md *fmd = p;
+ int ret;
+
+ if (!fimc || !fimc->pdev)
+ return 0;
+ if (fimc->pdev->id < 0 || fimc->pdev->id >= FIMC_MAX_DEVS)
+ return 0;
+
+ fmd->fimc[fimc->pdev->id] = fimc;
+ ret = fimc_register_m2m_device(fimc, &fmd->v4l2_dev);
+ if (ret)
+ return ret;
+ ret = fimc_register_capture_device(fimc, &fmd->v4l2_dev);
+ if (!ret)
+ fimc->vid_cap.user_subdev_api = fmd->user_subdev_api;
+ return ret;
+}
+
+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;
+ fmd->csis[id].sd = sd;
+ sd->grp_id = CSIS_GROUP_ID;
+ ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
+ if (ret)
+ 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 device_driver *driver;
+ int ret;
+
+ driver = driver_find(FIMC_MODULE_NAME, &platform_bus_type);
+ if (!driver)
+ return -ENODEV;
+ ret = driver_for_each_device(driver, NULL, fmd,
+ fimc_register_callback);
+ put_driver(driver);
+ if (ret)
+ return ret;
+
+ driver = driver_find(CSIS_DRIVER_NAME, &platform_bus_type);
+ if (driver) {
+ ret = driver_for_each_device(driver, NULL, fmd,
+ csis_register_callback);
+ put_driver(driver);
+ }
+ return ret;
+}
+
+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;
+ fimc_unregister_m2m_device(fmd->fimc[i]);
+ fimc_unregister_capture_device(fmd->fimc[i]);
+ fmd->fimc[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);
+ 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;
+ }
+}
+
+static int fimc_md_register_video_nodes(struct fimc_md *fmd)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < FIMC_MAX_DEVS && !ret; i++) {
+ if (!fmd->fimc[i])
+ continue;
+
+ if (fmd->fimc[i]->m2m.vfd)
+ ret = video_register_device(fmd->fimc[i]->m2m.vfd,
+ VFL_TYPE_GRABBER, -1);
+ if (ret)
+ break;
+ if (fmd->fimc[i]->vid_cap.vfd)
+ ret = video_register_device(fmd->fimc[i]->vid_cap.vfd,
+ VFL_TYPE_GRABBER, -1);
+ }
+
+ return ret;
+}
+
+/**
+ * __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
+ * @fimc_id: index of the fimc device for which link should be enabled
+ */
+static int __fimc_md_create_fimc_links(struct fimc_md *fmd,
+ struct media_entity *source,
+ struct v4l2_subdev *sensor,
+ int pad, int fimc_id)
+{
+ struct fimc_sensor_info *s_info;
+ struct media_entity *sink;
+ unsigned int flags;
+ int ret, i, src_pad;
+
+ for (i = 0; i < FIMC_MAX_DEVS; i++) {
+ if (!fmd->fimc[i])
+ break;
+ /*
+ * Some FIMC variants are not fitted with camera capture
+ * interface. Skip creating a link from sensor for those.
+ */
+ if (sensor && sensor->grp_id == SENSOR_GROUP_ID &&
+ !fmd->fimc[i]->variant->has_cam_if)
+ continue;
+
+ flags = (i == fimc_id) ? MEDIA_LNK_FL_ENABLED : 0;
+ sink = &fmd->fimc[i]->vid_cap.vfd->entity;
+ ret = media_entity_create_link(source, 0, sink, 0, flags);
+ if (ret)
+ return ret;
+
+ v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]",
+ 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);
+ }
+ }
+ return 0;
+}
+
+/**
+ * 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 *sensor, *csis;
+ struct s5p_fimc_isp_info *pdata;
+ struct fimc_sensor_info *s_info;
+ struct media_entity *source;
+ int fimc_id = 0;
+ int i, pad;
+ int ret = 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 || !s_info->pdata)
+ 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"))
+ continue;
+
+ ret = media_entity_create_link(&sensor->entity, 0,
+ &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);
+
+ sensor = NULL;
+ source = &csis->entity;
+ pad = CSIS_PAD_SOURCE;
+ 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;
+
+ ret = __fimc_md_create_fimc_links(fmd, source, sensor, pad,
+ fimc_id++);
+ }
+ return ret;
+}
+
+/*
+ * 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_OR_NULL(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;
+
+ if (s_info->clk_on == on)
+ return 0;
+ camclk = &fmd->camclk[pdata->clk_id];
+
+ dbg("camclk %d, f: %lu, clk: %p, on: %d",
+ pdata->clk_id, pdata->clk_frequency, camclk, 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);
+ }
+ s_info->clk_on = 1;
+ 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);
+ s_info->clk_on = 0;
+ 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.
+ * The per sensor subdev clk_on attribute helps to synchronize accesses
+ * to the sclk_cam clocks from the video and media device nodes.
+ * 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 video_device *vid_dev;
+ struct fimc_dev *fimc;
+ int ret = 0;
+
+ if (WARN_ON(media_entity_type(sink->entity) != MEDIA_ENT_T_DEVNODE))
+ return 0;
+
+ vid_dev = media_entity_to_video_device(sink->entity);
+ fimc = video_get_drvdata(vid_dev);
+
+ if (!(flags & MEDIA_LNK_FL_ENABLED)) {
+ ret = __fimc_pipeline_shutdown(fimc);
+ fimc->pipeline.sensor = NULL;
+ fimc->pipeline.csis = NULL;
+ return ret;
+ }
+ /*
+ * Link activation. Enable power of pipeline elements only if the
+ * pipeline is already in use, i.e. its video node is opened.
+ */
+ mutex_lock(&fimc->lock);
+ if (fimc->vid_cap.refcnt > 0)
+ ret = __fimc_pipeline_initialize(fimc, source->entity, true);
+ mutex_unlock(&fimc->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 __devinit fimc_md_probe(struct platform_device *pdev)
+{
+ struct v4l2_device *v4l2_dev;
+ struct fimc_md *fmd;
+ int ret;
+
+ if (WARN(!pdev->dev.platform_data, "Platform data not specified!\n"))
+ return -EINVAL;
+
+ fmd = kzalloc(sizeof(struct fimc_md), 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;
+ 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);
+ goto err1;
+ }
+ ret = media_device_register(&fmd->media_dev);
+ if (ret < 0) {
+ v4l2_err(v4l2_dev, "Failed to register media device: %d\n", ret);
+ goto err2;
+ }
+ ret = fimc_md_get_clocks(fmd);
+ if (ret)
+ goto err3;
+
+ fmd->user_subdev_api = false;
+ ret = fimc_md_register_platform_entities(fmd);
+ if (ret)
+ goto err3;
+
+ ret = fimc_md_register_sensor_entities(fmd);
+ if (ret)
+ goto err3;
+ ret = fimc_md_create_links(fmd);
+ if (ret)
+ goto err3;
+ ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
+ if (ret)
+ goto err3;
+ ret = fimc_md_register_video_nodes(fmd);
+ if (ret)
+ goto err3;
+
+ ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
+ if (!ret) {
+ platform_set_drvdata(pdev, fmd);
+ return 0;
+ }
+err3:
+ media_device_unregister(&fmd->media_dev);
+ fimc_md_put_clocks(fmd);
+ fimc_md_unregister_entities(fmd);
+err2:
+ v4l2_device_unregister(&fmd->v4l2_dev);
+err1:
+ kfree(fmd);
+ return ret;
+}
+
+static int __devexit 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);
+ kfree(fmd);
+ return 0;
+}
+
+static struct platform_driver fimc_md_driver = {
+ .probe = fimc_md_probe,
+ .remove = __devexit_p(fimc_md_remove),
+ .driver = {
+ .name = "s5p-fimc-md",
+ .owner = THIS_MODULE,
+ }
+};
+
+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);
+}
+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 <s.nawrocki@samsung.com>");
+MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("2.0.1");
projects / linux-flexiantxendom0-3.2.10.git / commitdiff