diff options
Diffstat (limited to 'drivers/media/platform/s5p-fimc/fimc-mdevice.c')
| -rw-r--r-- | drivers/media/platform/s5p-fimc/fimc-mdevice.c | 1050 |
1 files changed, 1050 insertions, 0 deletions
diff --git a/drivers/media/platform/s5p-fimc/fimc-mdevice.c b/drivers/media/platform/s5p-fimc/fimc-mdevice.c new file mode 100644 index 000000000000..80ada5882f62 --- /dev/null +++ b/drivers/media/platform/s5p-fimc/fimc-mdevice.c @@ -0,0 +1,1050 @@ +/* + * 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 <media/v4l2-ctrls.h> +#include <media/media-device.h> +#include <media/s5p_fimc.h> + +#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 SENSOR_GROUP_ID: + p->subdevs[IDX_SENSOR] = sd; + break; + case CSIS_GROUP_ID: + p->subdevs[IDX_CSIS] = sd; + break; + case FLITE_GROUP_ID: + p->subdevs[IDX_FLITE] = sd; + break; + case FIMC_GROUP_ID: + /* 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 + * + * This function must be 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); +} + +static int fimc_pipeline_open(struct fimc_pipeline *p, + struct media_entity *me, bool prep) +{ + int ret; + + mutex_lock(&me->parent->graph_mutex); + ret = __fimc_pipeline_open(p, me, prep); + mutex_unlock(&me->parent->graph_mutex); + + return ret; +} + +/** + * __fimc_pipeline_close - 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. + */ +static int __fimc_pipeline_close(struct fimc_pipeline *p) +{ + int ret = 0; + + 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; +} + +static int fimc_pipeline_close(struct fimc_pipeline *p) +{ + struct media_entity *me; + int ret; + + if (!p || !p->subdevs[IDX_SENSOR]) + return -EINVAL; + + me = &p->subdevs[IDX_SENSOR]->entity; + mutex_lock(&me->parent->graph_mutex); + ret = __fimc_pipeline_close(p); + mutex_unlock(&me->parent->graph_mutex); + + return ret; +} + +/** + * fimc_pipeline_s_stream - invoke s_stream on pipeline subdevs + * @pipeline: video pipeline structure + * @on: passed as the s_stream call argument + */ +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 = 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); + 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 = &fimc->vid_cap.subdev; + struct fimc_md *fmd = p; + int ret = 0; + + if (!fimc || !fimc->pdev) + return 0; + + if (fimc->pdev->id < 0 || fimc->pdev->id >= FIMC_MAX_DEVS) + return 0; + + fimc->pipeline_ops = &fimc_pipeline_ops; + fmd->fimc[fimc->pdev->id] = fimc; + sd->grp_id = FIMC_GROUP_ID; + + 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; +} + +static int fimc_lite_register_callback(struct device *dev, void *p) +{ + struct fimc_lite *fimc = dev_get_drvdata(dev); + struct v4l2_subdev *sd = &fimc->subdev; + struct fimc_md *fmd = p; + int ret; + + if (fimc == NULL) + return 0; + + if (fimc->index >= FIMC_LITE_MAX_DEVS) + return 0; + + fimc->pipeline_ops = &fimc_pipeline_ops; + fmd->fimc_lite[fimc->index] = fimc; + sd->grp_id = FLITE_GROUP_ID; + + ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); + if (ret) { + v4l2_err(&fmd->v4l2_dev, + "Failed to register FIMC-LITE.%d (%d)\n", + fimc->index, ret); + } + 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 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]", + 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; + + 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, FIMC_SD_PAD_SOURCE, + 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[2] = { 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; + + 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); + + 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 < ARRAY_SIZE(fmd->csis); 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_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; + + 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; + int ret = 0; + + 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 FLITE_GROUP_ID: + fimc_lite = v4l2_get_subdevdata(sd); + pipeline = &fimc_lite->pipeline; + break; + case FIMC_GROUP_ID: + fimc = v4l2_get_subdevdata(sd); + pipeline = &fimc->pipeline; + break; + default: + return 0; + } + + if (!(flags & MEDIA_LNK_FL_ENABLED)) { + ret = __fimc_pipeline_close(pipeline); + pipeline->subdevs[IDX_SENSOR] = NULL; + pipeline->subdevs[IDX_CSIS] = NULL; + + if (fimc) { + mutex_lock(&fimc->lock); + fimc_ctrls_delete(fimc->vid_cap.ctx); + mutex_unlock(&fimc->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. + */ + if (fimc) { + mutex_lock(&fimc->lock); + if (fimc->vid_cap.refcnt > 0) { + ret = __fimc_pipeline_open(pipeline, + source->entity, true); + if (!ret) + ret = fimc_capture_ctrls_create(fimc); + } + mutex_unlock(&fimc->lock); + } else { + mutex_lock(&fimc_lite->lock); + if (fimc_lite->ref_count > 0) { + ret = __fimc_pipeline_open(pipeline, + source->entity, true); + } + mutex_unlock(&fimc_lite->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 __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); + 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, + } +}; + +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 <s.nawrocki@samsung.com>"); +MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("2.0.1"); |