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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/platform_device.h>
14 #include <linux/mutex.h>
15 #include <linux/of.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <media/media-device.h>
18 #include <media/media-entity.h>
19 #include <media/v4l2-device.h>
20 #include <media/v4l2-subdev.h>
21 
22 #include "fimc-core.h"
23 #include "fimc-lite.h"
24 #include "mipi-csis.h"
25 
26 #define FIMC_OF_NODE_NAME	"fimc"
27 #define FIMC_LITE_OF_NODE_NAME	"fimc-lite"
28 #define FIMC_IS_OF_NODE_NAME	"fimc-is"
29 #define CSIS_OF_NODE_NAME	"csis"
30 
31 #define PINCTRL_STATE_IDLE	"idle"
32 
33 #define FIMC_MAX_SENSORS	8
34 #define FIMC_MAX_CAMCLKS	2
35 
36 /* LCD/ISP Writeback clocks (PIXELASYNCMx) */
37 enum {
38 	CLK_IDX_WB_A,
39 	CLK_IDX_WB_B,
40 	FIMC_MAX_WBCLKS
41 };
42 
43 struct fimc_csis_info {
44 	struct v4l2_subdev *sd;
45 	int id;
46 };
47 
48 struct fimc_camclk_info {
49 	struct clk *clock;
50 	int use_count;
51 	unsigned long frequency;
52 };
53 
54 /**
55  * struct fimc_sensor_info - image data source subdev information
56  * @pdata: sensor's atrributes passed as media device's platform data
57  * @subdev: image sensor v4l2 subdev
58  * @host: fimc device the sensor is currently linked to
59  *
60  * This data structure applies to image sensor and the writeback subdevs.
61  */
62 struct fimc_sensor_info {
63 	struct fimc_source_info pdata;
64 	struct v4l2_subdev *subdev;
65 	struct fimc_dev *host;
66 };
67 
68 /**
69  * struct fimc_md - fimc media device information
70  * @csis: MIPI CSIS subdevs data
71  * @sensor: array of registered sensor subdevs
72  * @num_sensors: actual number of registered sensors
73  * @camclk: external sensor clock information
74  * @fimc: array of registered fimc devices
75  * @fimc_is: fimc-is data structure
76  * @use_isp: set to true when FIMC-IS subsystem is used
77  * @pmf: handle to the CAMCLK clock control FIMC helper device
78  * @media_dev: top level media device
79  * @v4l2_dev: top level v4l2_device holding up the subdevs
80  * @pdev: platform device this media device is hooked up into
81  * @pinctrl: camera port pinctrl handle
82  * @state_default: pinctrl default state handle
83  * @state_idle: pinctrl idle state handle
84  * @user_subdev_api: true if subdevs are not configured by the host driver
85  * @slock: spinlock protecting @sensor array
86  */
87 struct fimc_md {
88 	struct fimc_csis_info csis[CSIS_MAX_ENTITIES];
89 	struct fimc_sensor_info sensor[FIMC_MAX_SENSORS];
90 	int num_sensors;
91 	struct fimc_camclk_info camclk[FIMC_MAX_CAMCLKS];
92 	struct clk *wbclk[FIMC_MAX_WBCLKS];
93 	struct fimc_lite *fimc_lite[FIMC_LITE_MAX_DEVS];
94 	struct fimc_dev *fimc[FIMC_MAX_DEVS];
95 	struct fimc_is *fimc_is;
96 	bool use_isp;
97 	struct device *pmf;
98 	struct media_device media_dev;
99 	struct v4l2_device v4l2_dev;
100 	struct platform_device *pdev;
101 	struct fimc_pinctrl {
102 		struct pinctrl *pinctrl;
103 		struct pinctrl_state *state_default;
104 		struct pinctrl_state *state_idle;
105 	} pinctl;
106 	bool user_subdev_api;
107 	spinlock_t slock;
108 };
109 
110 #define is_subdev_pad(pad) (pad == NULL || \
111 	media_entity_type(pad->entity) == MEDIA_ENT_T_V4L2_SUBDEV)
112 
113 #define me_subtype(me) \
114 	((me->type) & (MEDIA_ENT_TYPE_MASK | MEDIA_ENT_SUBTYPE_MASK))
115 
116 #define subdev_has_devnode(__sd) (__sd->flags & V4L2_SUBDEV_FL_HAS_DEVNODE)
117 
118 static inline
source_to_sensor_info(struct fimc_source_info * si)119 struct fimc_sensor_info *source_to_sensor_info(struct fimc_source_info *si)
120 {
121 	return container_of(si, struct fimc_sensor_info, pdata);
122 }
123 
entity_to_fimc_mdev(struct media_entity * me)124 static inline struct fimc_md *entity_to_fimc_mdev(struct media_entity *me)
125 {
126 	return me->parent == NULL ? NULL :
127 		container_of(me->parent, struct fimc_md, media_dev);
128 }
129 
fimc_md_graph_lock(struct fimc_dev * fimc)130 static inline void fimc_md_graph_lock(struct fimc_dev *fimc)
131 {
132 	mutex_lock(&fimc->vid_cap.vfd.entity.parent->graph_mutex);
133 }
134 
fimc_md_graph_unlock(struct fimc_dev * fimc)135 static inline void fimc_md_graph_unlock(struct fimc_dev *fimc)
136 {
137 	mutex_unlock(&fimc->vid_cap.vfd.entity.parent->graph_mutex);
138 }
139 
140 int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on);
141 
142 #ifdef CONFIG_OF
fimc_md_is_isp_available(struct device_node * node)143 static inline bool fimc_md_is_isp_available(struct device_node *node)
144 {
145 	node = of_get_child_by_name(node, FIMC_IS_OF_NODE_NAME);
146 	return node ? of_device_is_available(node) : false;
147 }
148 #else
149 #define fimc_md_is_isp_available(node) (false)
150 #endif /* CONFIG_OF */
151 
152 #endif
153