180 lines
4.3 KiB
C
180 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2015 VanguardiaSur - www.vanguardiasur.com.ar
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*
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* Copyright (C) 2015 Industrial Research Institute for Automation
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* and Measurements PIAP
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* Written by Krzysztof Ha?asa
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*/
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#include <linux/mutex.h>
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#include <linux/pci.h>
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#include <linux/timer.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/videobuf2-v4l2.h>
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#include <sound/pcm.h>
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#include "tw686x-regs.h"
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#define TYPE_MAX_CHANNELS 0x0f
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#define TYPE_SECOND_GEN 0x10
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#define TW686X_DEF_PHASE_REF 0x1518
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#define TW686X_AUDIO_PAGE_MAX 16
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#define TW686X_AUDIO_PERIODS_MIN 2
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#define TW686X_AUDIO_PERIODS_MAX TW686X_AUDIO_PAGE_MAX
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#define TW686X_DMA_MODE_MEMCPY 0
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#define TW686X_DMA_MODE_CONTIG 1
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#define TW686X_DMA_MODE_SG 2
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struct tw686x_format {
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char *name;
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unsigned int fourcc;
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unsigned int depth;
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unsigned int mode;
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};
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struct tw686x_dma_desc {
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dma_addr_t phys;
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void *virt;
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unsigned int size;
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};
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struct tw686x_sg_desc {
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/* 3 MSBits for flags, 13 LSBits for length */
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__le32 flags_length;
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__le32 phys;
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};
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struct tw686x_audio_buf {
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dma_addr_t dma;
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void *virt;
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struct list_head list;
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};
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struct tw686x_v4l2_buf {
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struct vb2_v4l2_buffer vb;
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struct list_head list;
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};
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struct tw686x_audio_channel {
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struct tw686x_dev *dev;
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struct snd_pcm_substream *ss;
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unsigned int ch;
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struct tw686x_audio_buf *curr_bufs[2];
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struct tw686x_dma_desc dma_descs[2];
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dma_addr_t ptr;
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struct tw686x_audio_buf buf[TW686X_AUDIO_PAGE_MAX];
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struct list_head buf_list;
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spinlock_t lock;
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};
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struct tw686x_video_channel {
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struct tw686x_dev *dev;
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struct vb2_queue vidq;
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struct list_head vidq_queued;
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struct video_device *device;
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struct tw686x_v4l2_buf *curr_bufs[2];
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struct tw686x_dma_desc dma_descs[2];
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struct tw686x_sg_desc *sg_descs[2];
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struct v4l2_ctrl_handler ctrl_handler;
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const struct tw686x_format *format;
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struct mutex vb_mutex;
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spinlock_t qlock;
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v4l2_std_id video_standard;
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unsigned int width, height;
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unsigned int h_halve, v_halve;
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unsigned int ch;
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unsigned int num;
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unsigned int fps;
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unsigned int input;
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unsigned int sequence;
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unsigned int pb;
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bool no_signal;
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};
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struct tw686x_dma_ops {
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int (*setup)(struct tw686x_dev *dev);
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int (*alloc)(struct tw686x_video_channel *vc, unsigned int pb);
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void (*free)(struct tw686x_video_channel *vc, unsigned int pb);
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void (*buf_refill)(struct tw686x_video_channel *vc, unsigned int pb);
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const struct vb2_mem_ops *mem_ops;
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enum v4l2_field field;
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u32 hw_dma_mode;
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};
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/* struct tw686x_dev - global device status */
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struct tw686x_dev {
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/*
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* spinlock controlling access to the shared device registers
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* (DMA enable/disable)
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*/
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spinlock_t lock;
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struct v4l2_device v4l2_dev;
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struct snd_card *snd_card;
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char name[32];
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unsigned int type;
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unsigned int dma_mode;
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struct pci_dev *pci_dev;
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__u32 __iomem *mmio;
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const struct tw686x_dma_ops *dma_ops;
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struct tw686x_video_channel *video_channels;
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struct tw686x_audio_channel *audio_channels;
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/* Per-device audio parameters */
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int audio_rate;
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int period_size;
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int audio_enabled;
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struct timer_list dma_delay_timer;
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u32 pending_dma_en; /* must be protected by lock */
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u32 pending_dma_cmd; /* must be protected by lock */
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};
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static inline uint32_t reg_read(struct tw686x_dev *dev, unsigned int reg)
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{
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return readl(dev->mmio + reg);
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}
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static inline void reg_write(struct tw686x_dev *dev, unsigned int reg,
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uint32_t value)
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{
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writel(value, dev->mmio + reg);
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}
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static inline unsigned int max_channels(struct tw686x_dev *dev)
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{
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return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */
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}
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static inline unsigned is_second_gen(struct tw686x_dev *dev)
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{
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/* each channel has its own DMA SG table */
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return dev->type & TYPE_SECOND_GEN;
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}
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void tw686x_enable_channel(struct tw686x_dev *dev, unsigned int channel);
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void tw686x_disable_channel(struct tw686x_dev *dev, unsigned int channel);
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int tw686x_video_init(struct tw686x_dev *dev);
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void tw686x_video_free(struct tw686x_dev *dev);
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void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests,
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unsigned int pb_status, unsigned int fifo_status,
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unsigned int *reset_ch);
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int tw686x_audio_init(struct tw686x_dev *dev);
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void tw686x_audio_free(struct tw686x_dev *dev);
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void tw686x_audio_irq(struct tw686x_dev *dev, unsigned long requests,
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unsigned int pb_status);
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