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/*
* 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);
}
static inline void reg_write(struct tw686x_dev *dev, unsigned int reg,
uint32_t value)
{
writel(value, dev->mmio + reg);
}
static inline unsigned int max_channels(struct tw686x_dev *dev)
{
return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */
}
static inline unsigned is_second_gen(struct tw686x_dev *dev)
{
/* each channel has its own DMA SG table */
return dev->type & TYPE_SECOND_GEN;
}
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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