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Release 4.11 drivers/media/pci/tw686x/tw686x.h

Directory: drivers/media/pci/tw686x
/*
 * Copyright (C) 2015 VanguardiaSur - www.vanguardiasur.com.ar
 *
 * Copyright (C) 2015 Industrial Research Institute for Automation
 * and Measurements PIAP
 * Written by Krzysztof Ha?asa
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License
 * as published by the Free Software Foundation.
 */

#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/timer.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-v4l2.h>
#include <sound/pcm.h>

#include "tw686x-regs.h"


#define TYPE_MAX_CHANNELS	0x0f

#define TYPE_SECOND_GEN		0x10

#define TW686X_DEF_PHASE_REF	0x1518


#define TW686X_AUDIO_PAGE_MAX		16

#define TW686X_AUDIO_PERIODS_MIN	2

#define TW686X_AUDIO_PERIODS_MAX	TW686X_AUDIO_PAGE_MAX


#define TW686X_DMA_MODE_MEMCPY		0

#define TW686X_DMA_MODE_CONTIG		1

#define TW686X_DMA_MODE_SG		2


struct tw686x_format {
	
char *name;
	
unsigned int fourcc;
	
unsigned int depth;
	
unsigned int mode;
};


struct tw686x_dma_desc {
	
dma_addr_t phys;
	
void *virt;
	
unsigned int size;
};


struct tw686x_sg_desc {
	/* 3 MSBits for flags, 13 LSBits for length */
	
__le32 flags_length;
	
__le32 phys;
};


struct tw686x_audio_buf {
	
dma_addr_t dma;
	
void *virt;
	
struct list_head list;
};


struct tw686x_v4l2_buf {
	
struct vb2_v4l2_buffer vb;
	
struct list_head list;
};


struct tw686x_audio_channel {
	
struct tw686x_dev *dev;
	
struct snd_pcm_substream *ss;
	
unsigned int ch;
	
struct tw686x_audio_buf *curr_bufs[2];
	
struct tw686x_dma_desc dma_descs[2];
	
dma_addr_t ptr;

	
struct tw686x_audio_buf buf[TW686X_AUDIO_PAGE_MAX];
	
struct list_head buf_list;
	
spinlock_t lock;
};


struct tw686x_video_channel {
	
struct tw686x_dev *dev;

	
struct vb2_queue vidq;
	
struct list_head vidq_queued;
	
struct video_device *device;
	
struct tw686x_v4l2_buf *curr_bufs[2];
	
struct tw686x_dma_desc dma_descs[2];
	
struct tw686x_sg_desc *sg_descs[2];

	
struct v4l2_ctrl_handler ctrl_handler;
	
const struct tw686x_format *format;
	
struct mutex vb_mutex;
	
spinlock_t qlock;
	
v4l2_std_id video_standard;
	

unsigned int width, height;
	

unsigned int h_halve, v_halve;
	
unsigned int ch;
	
unsigned int num;
	
unsigned int fps;
	
unsigned int input;
	
unsigned int sequence;
	
unsigned int pb;
	
bool no_signal;
};


struct tw686x_dma_ops {
	
int (*setup)(struct tw686x_dev *dev);
	
int (*alloc)(struct tw686x_video_channel *vc, unsigned int pb);
	
void (*free)(struct tw686x_video_channel *vc, unsigned int pb);
	
void (*buf_refill)(struct tw686x_video_channel *vc, unsigned int pb);
	
const struct vb2_mem_ops *mem_ops;
	
enum v4l2_field field;
	
u32 hw_dma_mode;
};

/**
 * struct tw686x_dev - global device status
 * @lock: spinlock controlling access to the
 *        shared device registers (DMA enable/disable).
 */

struct tw686x_dev {
	
spinlock_t lock;

	
struct v4l2_device v4l2_dev;
	
struct snd_card *snd_card;

	
char name[32];
	
unsigned int type;
	
unsigned int dma_mode;
	
struct pci_dev *pci_dev;
	
__u32 __iomem *mmio;

	
const struct tw686x_dma_ops *dma_ops;
	
struct tw686x_video_channel *video_channels;
	
struct tw686x_audio_channel *audio_channels;

	/* Per-device audio parameters */
	
int audio_rate;
	
int period_size;
	
int audio_enabled;

	
struct timer_list dma_delay_timer;
	
u32 pending_dma_en; /* must be protected by lock */
	
u32 pending_dma_cmd; /* must be protected by lock */
};




static inline uint32_t reg_read(struct tw686x_dev *dev, unsigned int reg)
{
	return readl(dev->mmio + reg);
}


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static inline void reg_write(struct tw686x_dev *dev, unsigned int reg,
			     uint32_t value)
{
	writel(value, dev->mmio + reg);
}


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static inline unsigned int max_channels(struct tw686x_dev *dev)
{
	return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */
}


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static inline unsigned is_second_gen(struct tw686x_dev *dev)
{
	/* each channel has its own DMA SG table */
	return dev->type & TYPE_SECOND_GEN;
}


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void tw686x_enable_channel(struct tw686x_dev *dev, unsigned int channel);
void tw686x_disable_channel(struct tw686x_dev *dev, unsigned int channel);

int tw686x_video_init(struct tw686x_dev *dev);
void tw686x_video_free(struct tw686x_dev *dev);
void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests,
		      unsigned int pb_status, unsigned int fifo_status,
		      unsigned int *reset_ch);

int tw686x_audio_init(struct tw686x_dev *dev);
void tw686x_audio_free(struct tw686x_dev *dev);
void tw686x_audio_irq(struct tw686x_dev *dev, unsigned long requests,
		      unsigned int pb_status);

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Directory: drivers/media/pci/tw686x



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