cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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tw686x.h (4434B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (C) 2015 VanguardiaSur - www.vanguardiasur.com.ar
      4 *
      5 * Copyright (C) 2015 Industrial Research Institute for Automation
      6 * and Measurements PIAP
      7 * Written by Krzysztof Ha?asa
      8 */
      9
     10#include <linux/mutex.h>
     11#include <linux/pci.h>
     12#include <linux/timer.h>
     13#include <linux/videodev2.h>
     14#include <media/v4l2-common.h>
     15#include <media/v4l2-ctrls.h>
     16#include <media/v4l2-device.h>
     17#include <media/v4l2-ioctl.h>
     18#include <media/videobuf2-v4l2.h>
     19#include <sound/pcm.h>
     20
     21#include "tw686x-regs.h"
     22
     23#define TYPE_MAX_CHANNELS	0x0f
     24#define TYPE_SECOND_GEN		0x10
     25#define TW686X_DEF_PHASE_REF	0x1518
     26
     27#define TW686X_AUDIO_PAGE_MAX		16
     28#define TW686X_AUDIO_PERIODS_MIN	2
     29#define TW686X_AUDIO_PERIODS_MAX	TW686X_AUDIO_PAGE_MAX
     30
     31#define TW686X_DMA_MODE_MEMCPY		0
     32#define TW686X_DMA_MODE_CONTIG		1
     33#define TW686X_DMA_MODE_SG		2
     34
     35struct tw686x_format {
     36	char *name;
     37	unsigned int fourcc;
     38	unsigned int depth;
     39	unsigned int mode;
     40};
     41
     42struct tw686x_dma_desc {
     43	dma_addr_t phys;
     44	void *virt;
     45	unsigned int size;
     46};
     47
     48struct tw686x_sg_desc {
     49	/* 3 MSBits for flags, 13 LSBits for length */
     50	__le32 flags_length;
     51	__le32 phys;
     52};
     53
     54struct tw686x_audio_buf {
     55	dma_addr_t dma;
     56	void *virt;
     57	struct list_head list;
     58};
     59
     60struct tw686x_v4l2_buf {
     61	struct vb2_v4l2_buffer vb;
     62	struct list_head list;
     63};
     64
     65struct tw686x_audio_channel {
     66	struct tw686x_dev *dev;
     67	struct snd_pcm_substream *ss;
     68	unsigned int ch;
     69	struct tw686x_audio_buf *curr_bufs[2];
     70	struct tw686x_dma_desc dma_descs[2];
     71	dma_addr_t ptr;
     72
     73	struct tw686x_audio_buf buf[TW686X_AUDIO_PAGE_MAX];
     74	struct list_head buf_list;
     75	spinlock_t lock;
     76};
     77
     78struct tw686x_video_channel {
     79	struct tw686x_dev *dev;
     80
     81	struct vb2_queue vidq;
     82	struct list_head vidq_queued;
     83	struct video_device *device;
     84	struct tw686x_v4l2_buf *curr_bufs[2];
     85	struct tw686x_dma_desc dma_descs[2];
     86	struct tw686x_sg_desc *sg_descs[2];
     87
     88	struct v4l2_ctrl_handler ctrl_handler;
     89	const struct tw686x_format *format;
     90	struct mutex vb_mutex;
     91	spinlock_t qlock;
     92	v4l2_std_id video_standard;
     93	unsigned int width, height;
     94	unsigned int h_halve, v_halve;
     95	unsigned int ch;
     96	unsigned int num;
     97	unsigned int fps;
     98	unsigned int input;
     99	unsigned int sequence;
    100	unsigned int pb;
    101	bool no_signal;
    102};
    103
    104struct tw686x_dma_ops {
    105	int (*setup)(struct tw686x_dev *dev);
    106	int (*alloc)(struct tw686x_video_channel *vc, unsigned int pb);
    107	void (*free)(struct tw686x_video_channel *vc, unsigned int pb);
    108	void (*buf_refill)(struct tw686x_video_channel *vc, unsigned int pb);
    109	const struct vb2_mem_ops *mem_ops;
    110	enum v4l2_field field;
    111	u32 hw_dma_mode;
    112};
    113
    114/* struct tw686x_dev - global device status */
    115struct tw686x_dev {
    116	/*
    117	 * spinlock controlling access to the shared device registers
    118	 * (DMA enable/disable)
    119	 */
    120	spinlock_t lock;
    121
    122	struct v4l2_device v4l2_dev;
    123	struct snd_card *snd_card;
    124
    125	char name[32];
    126	unsigned int type;
    127	unsigned int dma_mode;
    128	struct pci_dev *pci_dev;
    129	__u32 __iomem *mmio;
    130
    131	const struct tw686x_dma_ops *dma_ops;
    132	struct tw686x_video_channel *video_channels;
    133	struct tw686x_audio_channel *audio_channels;
    134
    135	/* Per-device audio parameters */
    136	int audio_rate;
    137	int period_size;
    138	int audio_enabled;
    139
    140	struct timer_list dma_delay_timer;
    141	u32 pending_dma_en; /* must be protected by lock */
    142	u32 pending_dma_cmd; /* must be protected by lock */
    143};
    144
    145static inline uint32_t reg_read(struct tw686x_dev *dev, unsigned int reg)
    146{
    147	return readl(dev->mmio + reg);
    148}
    149
    150static inline void reg_write(struct tw686x_dev *dev, unsigned int reg,
    151			     uint32_t value)
    152{
    153	writel(value, dev->mmio + reg);
    154}
    155
    156static inline unsigned int max_channels(struct tw686x_dev *dev)
    157{
    158	return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */
    159}
    160
    161static inline unsigned is_second_gen(struct tw686x_dev *dev)
    162{
    163	/* each channel has its own DMA SG table */
    164	return dev->type & TYPE_SECOND_GEN;
    165}
    166
    167void tw686x_enable_channel(struct tw686x_dev *dev, unsigned int channel);
    168void tw686x_disable_channel(struct tw686x_dev *dev, unsigned int channel);
    169
    170int tw686x_video_init(struct tw686x_dev *dev);
    171void tw686x_video_free(struct tw686x_dev *dev);
    172void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests,
    173		      unsigned int pb_status, unsigned int fifo_status,
    174		      unsigned int *reset_ch);
    175
    176int tw686x_audio_init(struct tw686x_dev *dev);
    177void tw686x_audio_free(struct tw686x_dev *dev);
    178void tw686x_audio_irq(struct tw686x_dev *dev, unsigned long requests,
    179		      unsigned int pb_status);