LXR linux/drivers/media/pci/tw686x/tw686x.h

   1/*
   2 * Copyright (C) 2015 VanguardiaSur - www.vanguardiasur.com.ar
   3 *
   4 * Copyright (C) 2015 Industrial Research Institute for Automation
   5 * and Measurements PIAP
   6 * Written by Krzysztof Ha?asa
   7 *
   8 * This program is free software; you can redistribute it and/or modify it
   9 * under the terms of version 2 of the GNU General Public License
  10 * as published by the Free Software Foundation.
  11 */
  12
  13#include <linux/mutex.h>
  14#include <linux/pci.h>
  15#include <linux/timer.h>
  16#include <linux/videodev2.h>
  17#include <media/v4l2-common.h>
  18#include <media/v4l2-ctrls.h>
  19#include <media/v4l2-device.h>
  20#include <media/v4l2-ioctl.h>
  21#include <media/videobuf2-v4l2.h>
  22#include <sound/pcm.h>
  23
  24#include "tw686x-regs.h"
  25
  26#define TYPE_MAX_CHANNELS       0x0f
  27#define TYPE_SECOND_GEN         0x10
  28#define TW686X_DEF_PHASE_REF    0x1518
  29
  30#define TW686X_AUDIO_PAGE_MAX           16
  31#define TW686X_AUDIO_PERIODS_MIN        2
  32#define TW686X_AUDIO_PERIODS_MAX        TW686X_AUDIO_PAGE_MAX
  33
  34#define TW686X_DMA_MODE_MEMCPY          0
  35#define TW686X_DMA_MODE_CONTIG          1
  36#define TW686X_DMA_MODE_SG              2
  37
  38struct tw686x_format {
  39        char *name;
  40        unsigned int fourcc;
  41        unsigned int depth;
  42        unsigned int mode;
  43};
  44
  45struct tw686x_dma_desc {
  46        dma_addr_t phys;
  47        void *virt;
  48        unsigned int size;
  49};
  50
  51struct tw686x_sg_desc {
  52        /* 3 MSBits for flags, 13 LSBits for length */
  53        __le32 flags_length;
  54        __le32 phys;
  55};
  56
  57struct tw686x_audio_buf {
  58        dma_addr_t dma;
  59        void *virt;
  60        struct list_head list;
  61};
  62
  63struct tw686x_v4l2_buf {
  64        struct vb2_v4l2_buffer vb;
  65        struct list_head list;
  66};
  67
  68struct tw686x_audio_channel {
  69        struct tw686x_dev *dev;
  70        struct snd_pcm_substream *ss;
  71        unsigned int ch;
  72        struct tw686x_audio_buf *curr_bufs[2];
  73        struct tw686x_dma_desc dma_descs[2];
  74        dma_addr_t ptr;
  75
  76        struct tw686x_audio_buf buf[TW686X_AUDIO_PAGE_MAX];
  77        struct list_head buf_list;
  78        spinlock_t lock;
  79};
  80
  81struct tw686x_video_channel {
  82        struct tw686x_dev *dev;
  83
  84        struct vb2_queue vidq;
  85        struct list_head vidq_queued;
  86        struct video_device *device;
  87        struct tw686x_v4l2_buf *curr_bufs[2];
  88        struct tw686x_dma_desc dma_descs[2];
  89        struct tw686x_sg_desc *sg_descs[2];
  90
  91        struct v4l2_ctrl_handler ctrl_handler;
  92        const struct tw686x_format *format;
  93        struct mutex vb_mutex;
  94        spinlock_t qlock;
  95        v4l2_std_id video_standard;
  96        unsigned int width, height;
  97        unsigned int h_halve, v_halve;
  98        unsigned int ch;
  99        unsigned int num;
 100        unsigned int fps;
 101        unsigned int input;
 102        unsigned int sequence;
 103        unsigned int pb;
 104        bool no_signal;
 105};
 106
 107struct tw686x_dma_ops {
 108        int (*setup)(struct tw686x_dev *dev);
 109        int (*alloc)(struct tw686x_video_channel *vc, unsigned int pb);
 110        void (*free)(struct tw686x_video_channel *vc, unsigned int pb);
 111        void (*buf_refill)(struct tw686x_video_channel *vc, unsigned int pb);
 112        const struct vb2_mem_ops *mem_ops;
 113        enum v4l2_field field;
 114        u32 hw_dma_mode;
 115};
 116
 117/**
 118 * struct tw686x_dev - global device status
 119 * @lock: spinlock controlling access to the
 120 *        shared device registers (DMA enable/disable).
 121 */
 122struct tw686x_dev {
 123        spinlock_t lock;
 124
 125        struct v4l2_device v4l2_dev;
 126        struct snd_card *snd_card;
 127
 128        char name[32];
 129        unsigned int type;
 130        unsigned int dma_mode;
 131        struct pci_dev *pci_dev;
 132        __u32 __iomem *mmio;
 133
 134        const struct tw686x_dma_ops *dma_ops;
 135        struct tw686x_video_channel *video_channels;
 136        struct tw686x_audio_channel *audio_channels;
 137
 138        /* Per-device audio parameters */
 139        int audio_rate;
 140        int period_size;
 141        int audio_enabled;
 142
 143        struct timer_list dma_delay_timer;
 144        u32 pending_dma_en; /* must be protected by lock */
 145        u32 pending_dma_cmd; /* must be protected by lock */
 146};
 147
 148static inline uint32_t reg_read(struct tw686x_dev *dev, unsigned int reg)
 149{
 150        return readl(dev->mmio + reg);
 151}
 152
 153static inline void reg_write(struct tw686x_dev *dev, unsigned int reg,
 154                             uint32_t value)
 155{
 156        writel(value, dev->mmio + reg);
 157}
 158
 159static inline unsigned int max_channels(struct tw686x_dev *dev)
 160{
 161        return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */
 162}
 163
 164static inline unsigned is_second_gen(struct tw686x_dev *dev)
 165{
 166        /* each channel has its own DMA SG table */
 167        return dev->type & TYPE_SECOND_GEN;
 168}
 169
 170void tw686x_enable_channel(struct tw686x_dev *dev, unsigned int channel);
 171void tw686x_disable_channel(struct tw686x_dev *dev, unsigned int channel);
 172
 173int tw686x_video_init(struct tw686x_dev *dev);
 174void tw686x_video_free(struct tw686x_dev *dev);
 175void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests,
 176                      unsigned int pb_status, unsigned int fifo_status,
 177                      unsigned int *reset_ch);
 178
 179int tw686x_audio_init(struct tw686x_dev *dev);
 180void tw686x_audio_free(struct tw686x_dev *dev);
 181void tw686x_audio_irq(struct tw686x_dev *dev, unsigned long requests,
 182                      unsigned int pb_status);
 183