1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * ispccdc.h
4 *
5 * TI OMAP3 ISP - CCDC module
6 *
7 * Copyright (C) 2009-2010 Nokia Corporation
8 * Copyright (C) 2009 Texas Instruments, Inc.
9 *
10 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
11 *	     Sakari Ailus <sakari.ailus@iki.fi>
12 */
13
14#ifndef OMAP3_ISP_CCDC_H
15#define OMAP3_ISP_CCDC_H
16
17#include <linux/omap3isp.h>
18#include <linux/workqueue.h>
19
20#include "ispvideo.h"
21
22enum ccdc_input_entity {
23	CCDC_INPUT_NONE,
24	CCDC_INPUT_PARALLEL,
25	CCDC_INPUT_CSI2A,
26	CCDC_INPUT_CCP2B,
27	CCDC_INPUT_CSI2C
28};
29
30#define CCDC_OUTPUT_MEMORY	(1 << 0)
31#define CCDC_OUTPUT_PREVIEW	(1 << 1)
32#define CCDC_OUTPUT_RESIZER	(1 << 2)
33
34#define	OMAP3ISP_CCDC_NEVENTS	16
35
36struct ispccdc_fpc {
37	void *addr;
38	dma_addr_t dma;
39	unsigned int fpnum;
40};
41
42enum ispccdc_lsc_state {
43	LSC_STATE_STOPPED = 0,
44	LSC_STATE_STOPPING = 1,
45	LSC_STATE_RUNNING = 2,
46	LSC_STATE_RECONFIG = 3,
47};
48
49struct ispccdc_lsc_config_req {
50	struct list_head list;
51	struct omap3isp_ccdc_lsc_config config;
52	unsigned char enable;
53
54	struct {
55		void *addr;
56		dma_addr_t dma;
57		struct sg_table sgt;
58	} table;
59};
60
61/*
62 * ispccdc_lsc - CCDC LSC parameters
63 */
64struct ispccdc_lsc {
65	enum ispccdc_lsc_state state;
66	struct work_struct table_work;
67
68	/* LSC queue of configurations */
69	spinlock_t req_lock;
70	struct ispccdc_lsc_config_req *request;	/* requested configuration */
71	struct ispccdc_lsc_config_req *active;	/* active configuration */
72	struct list_head free_queue;	/* configurations for freeing */
73};
74
75#define CCDC_STOP_NOT_REQUESTED		0x00
76#define CCDC_STOP_REQUEST		0x01
77#define CCDC_STOP_EXECUTED		(0x02 | CCDC_STOP_REQUEST)
78#define CCDC_STOP_CCDC_FINISHED		0x04
79#define CCDC_STOP_LSC_FINISHED		0x08
80#define CCDC_STOP_FINISHED		\
81	(CCDC_STOP_EXECUTED | CCDC_STOP_CCDC_FINISHED | CCDC_STOP_LSC_FINISHED)
82
83#define CCDC_EVENT_VD1			0x10
84#define CCDC_EVENT_VD0			0x20
85#define CCDC_EVENT_LSC_DONE		0x40
86
87/* Sink and source CCDC pads */
88#define CCDC_PAD_SINK			0
89#define CCDC_PAD_SOURCE_OF		1
90#define CCDC_PAD_SOURCE_VP		2
91#define CCDC_PADS_NUM			3
92
93#define CCDC_FIELD_TOP			1
94#define CCDC_FIELD_BOTTOM		2
95#define CCDC_FIELD_BOTH			3
96
97/*
98 * struct isp_ccdc_device - Structure for the CCDC module to store its own
99 *			    information
100 * @subdev: V4L2 subdevice
101 * @pads: Sink and source media entity pads
102 * @formats: Active video formats
103 * @crop: Active crop rectangle on the OF source pad
104 * @input: Active input
105 * @output: Active outputs
106 * @video_out: Output video node
107 * @alaw: A-law compression enabled (1) or disabled (0)
108 * @lpf: Low pass filter enabled (1) or disabled (0)
109 * @obclamp: Optical-black clamp enabled (1) or disabled (0)
110 * @fpc_en: Faulty pixels correction enabled (1) or disabled (0)
111 * @blcomp: Black level compensation configuration
112 * @clamp: Optical-black or digital clamp configuration
113 * @fpc: Faulty pixels correction configuration
114 * @lsc: Lens shading compensation configuration
115 * @update: Bitmask of controls to update during the next interrupt
116 * @shadow_update: Controls update in progress by userspace
117 * @bt656: Whether the input interface uses BT.656 synchronization
118 * @fields: The fields (CCDC_FIELD_*) stored in the current buffer
119 * @underrun: A buffer underrun occurred and a new buffer has been queued
120 * @state: Streaming state
121 * @lock: Serializes shadow_update with interrupt handler
122 * @wait: Wait queue used to stop the module
123 * @stopping: Stopping state
124 * @running: Is the CCDC hardware running
125 * @ioctl_lock: Serializes ioctl calls and LSC requests freeing
126 */
127struct isp_ccdc_device {
128	struct v4l2_subdev subdev;
129	struct media_pad pads[CCDC_PADS_NUM];
130	struct v4l2_mbus_framefmt formats[CCDC_PADS_NUM];
131	struct v4l2_rect crop;
132
133	enum ccdc_input_entity input;
134	unsigned int output;
135	struct isp_video video_out;
136
137	unsigned int alaw:1,
138		     lpf:1,
139		     obclamp:1,
140		     fpc_en:1;
141	struct omap3isp_ccdc_blcomp blcomp;
142	struct omap3isp_ccdc_bclamp clamp;
143	struct ispccdc_fpc fpc;
144	struct ispccdc_lsc lsc;
145	unsigned int update;
146	unsigned int shadow_update;
147
148	bool bt656;
149	unsigned int fields;
150
151	unsigned int underrun:1;
152	enum isp_pipeline_stream_state state;
153	spinlock_t lock;
154	wait_queue_head_t wait;
155	unsigned int stopping;
156	bool running;
157	struct mutex ioctl_lock;
158};
159
160struct isp_device;
161
162int omap3isp_ccdc_init(struct isp_device *isp);
163void omap3isp_ccdc_cleanup(struct isp_device *isp);
164int omap3isp_ccdc_register_entities(struct isp_ccdc_device *ccdc,
165	struct v4l2_device *vdev);
166void omap3isp_ccdc_unregister_entities(struct isp_ccdc_device *ccdc);
167
168int omap3isp_ccdc_busy(struct isp_ccdc_device *isp_ccdc);
169int omap3isp_ccdc_isr(struct isp_ccdc_device *isp_ccdc, u32 events);
170void omap3isp_ccdc_restore_context(struct isp_device *isp);
171void omap3isp_ccdc_max_rate(struct isp_ccdc_device *ccdc,
172	unsigned int *max_rate);
173
174#endif	/* OMAP3_ISP_CCDC_H */
175