2 * Copyright (C) 2015 Industrial Research Institute for Automation
3 * and Measurements PIAP
5 * Written by Krzysztof Ha?asa.
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License
9 * as published by the Free Software Foundation.
12 #include <linux/delay.h>
13 #include <linux/freezer.h>
14 #include <linux/interrupt.h>
15 #include <linux/kthread.h>
16 #include <linux/mutex.h>
17 #include <linux/pci.h>
18 #include <media/videobuf2-dma-sg.h>
19 #include <linux/videodev2.h>
20 #include <media/v4l2-common.h>
21 #include <media/v4l2-ctrls.h>
22 #include <media/v4l2-device.h>
23 #include <media/v4l2-ioctl.h>
25 #define TYPE_MAX_CHANNELS 0x0F
26 #define TYPE_SECOND_GEN 0x10
28 struct tw686x_format {
42 __le32 flags_length; /* 3 MSBits for flags, 13 LSBits for length */
46 struct tw686x_vb2_buf {
47 struct vb2_v4l2_buffer vb;
48 struct list_head list;
51 struct tw686x_video_channel {
52 struct tw686x_dev *dev;
54 struct vb2_queue vidq;
55 struct list_head vidq_queued;
56 struct video_device *device;
57 struct dma_desc sg_tables[2];
58 struct tw686x_vb2_buf *curr_bufs[2];
59 struct vdma_desc *sg_descs[2];
61 struct v4l2_ctrl_handler ctrl_handler;
62 const struct tw686x_format *format;
63 struct mutex vb_mutex;
65 v4l2_std_id video_standard;
66 unsigned int width, height;
67 enum v4l2_field field; /* supported TOP, BOTTOM, SEQ_TB and SEQ_BT */
68 unsigned int seq; /* video field or frame counter */
72 /* global device status */
76 struct v4l2_device v4l2_dev;
77 struct snd_card *card; /* sound card */
79 unsigned int video_active; /* active video channel mask */
83 struct pci_dev *pci_dev;
86 struct task_struct *video_thread;
87 wait_queue_head_t video_thread_wait;
90 struct tw686x_video_channel video_channels[0];
93 static inline uint32_t reg_read(struct tw686x_dev *dev, unsigned int reg)
95 return readl(dev->mmio + reg);
98 static inline void reg_write(struct tw686x_dev *dev, unsigned int reg,
101 writel(value, dev->mmio + reg);
104 static inline unsigned int max_channels(struct tw686x_dev *dev)
106 return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */
109 static inline unsigned int is_second_gen(struct tw686x_dev *dev)
111 /* each channel has its own DMA SG table */
112 return dev->type & TYPE_SECOND_GEN;
115 int tw686x_kh_video_irq(struct tw686x_dev *dev);
116 int tw686x_kh_video_init(struct tw686x_dev *dev);
117 void tw686x_kh_video_free(struct tw686x_dev *dev);