drivers/staging/media/tw686x-kh/tw686x-kh.h

   1 /*
   2  * Copyright (C) 2015 Industrial Research Institute for Automation
   3  * and Measurements PIAP
   4  *
   5  * Written by Krzysztof Ha?asa.
   6  *
   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.
  10  */
  11
  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>
  24
  25 #define TYPE_MAX_CHANNELS 0x0F
  26 #define TYPE_SECOND_GEN   0x10
  27
  28 struct tw686x_format {
  29         char *name;
  30         unsigned int fourcc;
  31         unsigned int depth;
  32         unsigned int mode;
  33 };
  34
  35 struct dma_desc {
  36         dma_addr_t phys;
  37         void *virt;
  38         unsigned int size;
  39 };
  40
  41 struct vdma_desc {
  42         __le32 flags_length;    /* 3 MSBits for flags, 13 LSBits for length */
  43         __le32 phys;
  44 };
  45
  46 struct tw686x_vb2_buf {
  47         struct vb2_v4l2_buffer vb;
  48         struct list_head list;
  49 };
  50
  51 struct tw686x_video_channel {
  52         struct tw686x_dev *dev;
  53
  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];
  60
  61         struct v4l2_ctrl_handler ctrl_handler;
  62         const struct tw686x_format *format;
  63         struct mutex vb_mutex;
  64         spinlock_t qlock;
  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 */
  69         unsigned int ch;
  70 };
  71
  72 /* global device status */
  73 struct tw686x_dev {
  74         spinlock_t irq_lock;
  75
  76         struct v4l2_device v4l2_dev;
  77         struct snd_card *card;  /* sound card */
  78
  79         unsigned int video_active;      /* active video channel mask */
  80
  81         char name[32];
  82         unsigned int type;
  83         struct pci_dev *pci_dev;
  84         __u32 __iomem *mmio;
  85
  86         struct task_struct *video_thread;
  87         wait_queue_head_t video_thread_wait;
  88         u32 dma_requests;
  89
  90         struct tw686x_video_channel video_channels[0];
  91 };
  92
  93 static inline uint32_t reg_read(struct tw686x_dev *dev, unsigned int reg)
  94 {
  95         return readl(dev->mmio + reg);
  96 }
  97
  98 static inline void reg_write(struct tw686x_dev *dev, unsigned int reg,
  99                              uint32_t value)
 100 {
 101         writel(value, dev->mmio + reg);
 102 }
 103
 104 static inline unsigned int max_channels(struct tw686x_dev *dev)
 105 {
 106         return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */
 107 }
 108
 109 static inline unsigned int is_second_gen(struct tw686x_dev *dev)
 110 {
 111         /* each channel has its own DMA SG table */
 112         return dev->type & TYPE_SECOND_GEN;
 113 }
 114
 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);