1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2012 Samsung Electronics Co., Ltd.
4 */
5
6 #ifndef FIMC_LITE_H_
7 #define FIMC_LITE_H_
8
9 #include <linux/sizes.h>
10 #include <linux/io.h>
11 #include <linux/irqreturn.h>
12 #include <linux/platform_device.h>
13 #include <linux/sched.h>
14 #include <linux/spinlock.h>
15 #include <linux/types.h>
16 #include <linux/videodev2.h>
17
18 #include <media/media-entity.h>
19 #include <media/videobuf2-v4l2.h>
20 #include <media/v4l2-ctrls.h>
21 #include <media/v4l2-device.h>
22 #include <media/v4l2-mediabus.h>
23 #include <media/drv-intf/exynos-fimc.h>
24
25 #define FIMC_LITE_DRV_NAME "exynos-fimc-lite"
26 #define FLITE_CLK_NAME "flite"
27 #define FIMC_LITE_MAX_DEVS 3
28 #define FLITE_REQ_BUFS_MIN 2
29 #define FLITE_DEFAULT_WIDTH 640
30 #define FLITE_DEFAULT_HEIGHT 480
31
32 /* Bit index definitions for struct fimc_lite::state */
33 enum {
34 ST_FLITE_LPM,
35 ST_FLITE_PENDING,
36 ST_FLITE_RUN,
37 ST_FLITE_STREAM,
38 ST_FLITE_SUSPENDED,
39 ST_FLITE_OFF,
40 ST_FLITE_IN_USE,
41 ST_FLITE_CONFIG,
42 ST_SENSOR_STREAM,
43 };
44
45 #define FLITE_SD_PAD_SINK 0
46 #define FLITE_SD_PAD_SOURCE_DMA 1
47 #define FLITE_SD_PAD_SOURCE_ISP 2
48 #define FLITE_SD_PADS_NUM 3
49
50 /**
51 * struct flite_drvdata - FIMC-LITE IP variant data structure
52 * @max_width: maximum camera interface input width in pixels
53 * @max_height: maximum camera interface input height in pixels
54 * @out_width_align: minimum output width alignment in pixels
55 * @win_hor_offs_align: minimum camera interface crop window horizontal
56 * offset alignment in pixels
57 * @out_hor_offs_align: minimum output DMA compose rectangle horizontal
58 * offset alignment in pixels
59 * @max_dma_bufs: number of output DMA buffer start address registers
60 * @num_instances: total number of FIMC-LITE IP instances available
61 */
62 struct flite_drvdata {
63 unsigned short max_width;
64 unsigned short max_height;
65 unsigned short out_width_align;
66 unsigned short win_hor_offs_align;
67 unsigned short out_hor_offs_align;
68 unsigned short max_dma_bufs;
69 unsigned short num_instances;
70 };
71
72 struct fimc_lite_events {
73 unsigned int data_overflow;
74 };
75
76 #define FLITE_MAX_PLANES 1
77
78 /**
79 * struct flite_frame - source/target frame properties
80 * @f_width: full pixel width
81 * @f_height: full pixel height
82 * @rect: crop/composition rectangle
83 * @fmt: pointer to pixel format description data structure
84 */
85 struct flite_frame {
86 u16 f_width;
87 u16 f_height;
88 struct v4l2_rect rect;
89 const struct fimc_fmt *fmt;
90 };
91
92 /**
93 * struct flite_buffer - video buffer structure
94 * @vb: vb2 buffer
95 * @list: list head for the buffers queue
96 * @paddr: DMA buffer start address
97 * @index: DMA start address register's index
98 */
99 struct flite_buffer {
100 struct vb2_v4l2_buffer vb;
101 struct list_head list;
102 dma_addr_t paddr;
103 unsigned short index;
104 };
105
106 /**
107 * struct fimc_lite - fimc lite structure
108 * @pdev: pointer to FIMC-LITE platform device
109 * @dd: SoC specific driver data structure
110 * @ve: exynos video device entity structure
111 * @v4l2_dev: pointer to top the level v4l2_device
112 * @fh: v4l2 file handle
113 * @subdev: FIMC-LITE subdev
114 * @vd_pad: media (sink) pad for the capture video node
115 * @subdev_pads: the subdev media pads
116 * @sensor: sensor subdev attached to FIMC-LITE directly or through MIPI-CSIS
117 * @ctrl_handler: v4l2 control handler
118 * @test_pattern: test pattern controls
119 * @index: FIMC-LITE platform device index
120 * @pipeline: video capture pipeline data structure
121 * @pipeline_ops: media pipeline ops for the video node driver
122 * @slock: spinlock protecting this data structure and the hw registers
123 * @lock: mutex serializing video device and the subdev operations
124 * @clock: FIMC-LITE gate clock
125 * @regs: memory mapped io registers
126 * @irq_queue: interrupt handler waitqueue
127 * @payload: image size in bytes (w x h x bpp)
128 * @inp_frame: camera input frame structure
129 * @out_frame: DMA output frame structure
130 * @out_path: output data path (DMA or FIFO)
131 * @source_subdev_grp_id: source subdev group id
132 * @state: driver state flags
133 * @pending_buf_q: pending buffers queue head
134 * @active_buf_q: the queue head of buffers scheduled in hardware
135 * @vb_queue: vb2 buffers queue
136 * @buf_index: helps to keep track of the DMA start address register index
137 * @active_buf_count: number of video buffers scheduled in hardware
138 * @frame_count: the captured frames counter
139 * @reqbufs_count: the number of buffers requested with REQBUFS ioctl
140 */
141 struct fimc_lite {
142 struct platform_device *pdev;
143 struct flite_drvdata *dd;
144 struct exynos_video_entity ve;
145 struct v4l2_device *v4l2_dev;
146 struct v4l2_fh fh;
147 struct v4l2_subdev subdev;
148 struct media_pad vd_pad;
149 struct media_pad subdev_pads[FLITE_SD_PADS_NUM];
150 struct v4l2_subdev *sensor;
151 struct v4l2_ctrl_handler ctrl_handler;
152 struct v4l2_ctrl *test_pattern;
153 int index;
154
155 struct mutex lock;
156 spinlock_t slock;
157
158 struct clk *clock;
159 void __iomem *regs;
160 wait_queue_head_t irq_queue;
161
162 unsigned long payload[FLITE_MAX_PLANES];
163 struct flite_frame inp_frame;
164 struct flite_frame out_frame;
165 atomic_t out_path;
166 unsigned int source_subdev_grp_id;
167
168 unsigned long state;
169 struct list_head pending_buf_q;
170 struct list_head active_buf_q;
171 struct vb2_queue vb_queue;
172 unsigned short buf_index;
173 unsigned int frame_count;
174 unsigned int reqbufs_count;
175
176 struct fimc_lite_events events;
177 bool streaming;
178 };
179
fimc_lite_active(struct fimc_lite * fimc)180 static inline bool fimc_lite_active(struct fimc_lite *fimc)
181 {
182 unsigned long flags;
183 bool ret;
184
185 spin_lock_irqsave(&fimc->slock, flags);
186 ret = fimc->state & (1 << ST_FLITE_RUN) ||
187 fimc->state & (1 << ST_FLITE_PENDING);
188 spin_unlock_irqrestore(&fimc->slock, flags);
189 return ret;
190 }
191
fimc_lite_active_queue_add(struct fimc_lite * dev,struct flite_buffer * buf)192 static inline void fimc_lite_active_queue_add(struct fimc_lite *dev,
193 struct flite_buffer *buf)
194 {
195 list_add_tail(&buf->list, &dev->active_buf_q);
196 }
197
fimc_lite_active_queue_pop(struct fimc_lite * dev)198 static inline struct flite_buffer *fimc_lite_active_queue_pop(
199 struct fimc_lite *dev)
200 {
201 struct flite_buffer *buf = list_entry(dev->active_buf_q.next,
202 struct flite_buffer, list);
203 list_del(&buf->list);
204 return buf;
205 }
206
fimc_lite_pending_queue_add(struct fimc_lite * dev,struct flite_buffer * buf)207 static inline void fimc_lite_pending_queue_add(struct fimc_lite *dev,
208 struct flite_buffer *buf)
209 {
210 list_add_tail(&buf->list, &dev->pending_buf_q);
211 }
212
fimc_lite_pending_queue_pop(struct fimc_lite * dev)213 static inline struct flite_buffer *fimc_lite_pending_queue_pop(
214 struct fimc_lite *dev)
215 {
216 struct flite_buffer *buf = list_entry(dev->pending_buf_q.next,
217 struct flite_buffer, list);
218 list_del(&buf->list);
219 return buf;
220 }
221
222 #endif /* FIMC_LITE_H_ */
223