linux/drivers/media/platform/exynos4-is/media-dev.h
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   1/*
   2 * Copyright (C) 2011 - 2012 Samsung Electronics Co., Ltd.
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 */
   8
   9#ifndef FIMC_MDEVICE_H_
  10#define FIMC_MDEVICE_H_
  11
  12#include <linux/clk.h>
  13#include <linux/clk-provider.h>
  14#include <linux/platform_device.h>
  15#include <linux/mutex.h>
  16#include <linux/of.h>
  17#include <linux/pinctrl/consumer.h>
  18#include <media/media-device.h>
  19#include <media/media-entity.h>
  20#include <media/v4l2-device.h>
  21#include <media/v4l2-subdev.h>
  22#include <media/drv-intf/exynos-fimc.h>
  23
  24#include "fimc-core.h"
  25#include "fimc-lite.h"
  26#include "mipi-csis.h"
  27
  28#define FIMC_OF_NODE_NAME       "fimc"
  29#define FIMC_LITE_OF_NODE_NAME  "fimc-lite"
  30#define FIMC_IS_OF_NODE_NAME    "fimc-is"
  31#define CSIS_OF_NODE_NAME       "csis"
  32
  33#define PINCTRL_STATE_IDLE      "idle"
  34
  35#define FIMC_MAX_SENSORS        4
  36#define FIMC_MAX_CAMCLKS        2
  37#define DEFAULT_SENSOR_CLK_FREQ 24000000U
  38
  39/* LCD/ISP Writeback clocks (PIXELASYNCMx) */
  40enum {
  41        CLK_IDX_WB_A,
  42        CLK_IDX_WB_B,
  43        FIMC_MAX_WBCLKS
  44};
  45
  46enum fimc_subdev_index {
  47        IDX_SENSOR,
  48        IDX_CSIS,
  49        IDX_FLITE,
  50        IDX_IS_ISP,
  51        IDX_FIMC,
  52        IDX_MAX,
  53};
  54
  55/*
  56 * This structure represents a chain of media entities, including a data
  57 * source entity (e.g. an image sensor subdevice), a data capture entity
  58 * - a video capture device node and any remaining entities.
  59 */
  60struct fimc_pipeline {
  61        struct exynos_media_pipeline ep;
  62        struct list_head list;
  63        struct media_entity *vdev_entity;
  64        struct v4l2_subdev *subdevs[IDX_MAX];
  65};
  66
  67#define to_fimc_pipeline(_ep) container_of(_ep, struct fimc_pipeline, ep)
  68
  69struct fimc_csis_info {
  70        struct v4l2_subdev *sd;
  71        int id;
  72};
  73
  74struct fimc_camclk_info {
  75        struct clk *clock;
  76        int use_count;
  77        unsigned long frequency;
  78};
  79
  80/**
  81 * struct fimc_sensor_info - image data source subdev information
  82 * @pdata: sensor's atrributes passed as media device's platform data
  83 * @asd: asynchronous subdev registration data structure
  84 * @subdev: image sensor v4l2 subdev
  85 * @host: fimc device the sensor is currently linked to
  86 *
  87 * This data structure applies to image sensor and the writeback subdevs.
  88 */
  89struct fimc_sensor_info {
  90        struct fimc_source_info pdata;
  91        struct v4l2_async_subdev asd;
  92        struct v4l2_subdev *subdev;
  93        struct fimc_dev *host;
  94};
  95
  96struct cam_clk {
  97        struct clk_hw hw;
  98        struct fimc_md *fmd;
  99};
 100#define to_cam_clk(_hw) container_of(_hw, struct cam_clk, hw)
 101
 102/**
 103 * struct fimc_md - fimc media device information
 104 * @csis: MIPI CSIS subdevs data
 105 * @sensor: array of registered sensor subdevs
 106 * @num_sensors: actual number of registered sensors
 107 * @camclk: external sensor clock information
 108 * @fimc: array of registered fimc devices
 109 * @fimc_is: fimc-is data structure
 110 * @use_isp: set to true when FIMC-IS subsystem is used
 111 * @pmf: handle to the CAMCLK clock control FIMC helper device
 112 * @media_dev: top level media device
 113 * @v4l2_dev: top level v4l2_device holding up the subdevs
 114 * @pdev: platform device this media device is hooked up into
 115 * @pinctrl: camera port pinctrl handle
 116 * @state_default: pinctrl default state handle
 117 * @state_idle: pinctrl idle state handle
 118 * @cam_clk_provider: CAMCLK clock provider structure
 119 * @user_subdev_api: true if subdevs are not configured by the host driver
 120 * @slock: spinlock protecting @sensor array
 121 */
 122struct fimc_md {
 123        struct fimc_csis_info csis[CSIS_MAX_ENTITIES];
 124        struct fimc_sensor_info sensor[FIMC_MAX_SENSORS];
 125        int num_sensors;
 126        struct fimc_camclk_info camclk[FIMC_MAX_CAMCLKS];
 127        struct clk *wbclk[FIMC_MAX_WBCLKS];
 128        struct fimc_lite *fimc_lite[FIMC_LITE_MAX_DEVS];
 129        struct fimc_dev *fimc[FIMC_MAX_DEVS];
 130        struct fimc_is *fimc_is;
 131        bool use_isp;
 132        struct device *pmf;
 133        struct media_device media_dev;
 134        struct v4l2_device v4l2_dev;
 135        struct platform_device *pdev;
 136
 137        struct fimc_pinctrl {
 138                struct pinctrl *pinctrl;
 139                struct pinctrl_state *state_default;
 140                struct pinctrl_state *state_idle;
 141        } pinctl;
 142
 143        struct cam_clk_provider {
 144                struct clk *clks[FIMC_MAX_CAMCLKS];
 145                struct clk_onecell_data clk_data;
 146                struct device_node *of_node;
 147                struct cam_clk camclk[FIMC_MAX_CAMCLKS];
 148                int num_clocks;
 149        } clk_provider;
 150
 151        struct v4l2_async_notifier subdev_notifier;
 152        struct v4l2_async_subdev *async_subdevs[FIMC_MAX_SENSORS];
 153
 154        bool user_subdev_api;
 155        spinlock_t slock;
 156        struct list_head pipelines;
 157        struct media_entity_graph link_setup_graph;
 158};
 159
 160static inline
 161struct fimc_sensor_info *source_to_sensor_info(struct fimc_source_info *si)
 162{
 163        return container_of(si, struct fimc_sensor_info, pdata);
 164}
 165
 166static inline struct fimc_md *entity_to_fimc_mdev(struct media_entity *me)
 167{
 168        return me->graph_obj.mdev == NULL ? NULL :
 169                container_of(me->graph_obj.mdev, struct fimc_md, media_dev);
 170}
 171
 172static inline struct fimc_md *notifier_to_fimc_md(struct v4l2_async_notifier *n)
 173{
 174        return container_of(n, struct fimc_md, subdev_notifier);
 175}
 176
 177static inline void fimc_md_graph_lock(struct exynos_video_entity *ve)
 178{
 179        mutex_lock(&ve->vdev.entity.graph_obj.mdev->graph_mutex);
 180}
 181
 182static inline void fimc_md_graph_unlock(struct exynos_video_entity *ve)
 183{
 184        mutex_unlock(&ve->vdev.entity.graph_obj.mdev->graph_mutex);
 185}
 186
 187int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on);
 188
 189#ifdef CONFIG_OF
 190static inline bool fimc_md_is_isp_available(struct device_node *node)
 191{
 192        node = of_get_child_by_name(node, FIMC_IS_OF_NODE_NAME);
 193        return node ? of_device_is_available(node) : false;
 194}
 195#else
 196#define fimc_md_is_isp_available(node) (false)
 197#endif /* CONFIG_OF */
 198
 199static inline struct v4l2_subdev *__fimc_md_get_subdev(
 200                                struct exynos_media_pipeline *ep,
 201                                unsigned int index)
 202{
 203        struct fimc_pipeline *p = to_fimc_pipeline(ep);
 204
 205        if (!p || index >= IDX_MAX)
 206                return NULL;
 207        else
 208                return p->subdevs[index];
 209}
 210
 211#endif
 212