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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pt3.h (4347B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Earthsoft PT3 driver
      4 *
      5 * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
      6 */
      7
      8#ifndef PT3_H
      9#define PT3_H
     10
     11#include <linux/atomic.h>
     12#include <linux/types.h>
     13
     14#include <media/dvb_demux.h>
     15#include <media/dvb_frontend.h>
     16#include <media/dmxdev.h>
     17
     18#include "tc90522.h"
     19#include "mxl301rf.h"
     20#include "qm1d1c0042.h"
     21
     22#define DRV_NAME KBUILD_MODNAME
     23
     24#define PT3_NUM_FE 4
     25
     26/*
     27 * register index of the FPGA chip
     28 */
     29#define REG_VERSION	0x00
     30#define REG_BUS		0x04
     31#define REG_SYSTEM_W	0x08
     32#define REG_SYSTEM_R	0x0c
     33#define REG_I2C_W	0x10
     34#define REG_I2C_R	0x14
     35#define REG_RAM_W	0x18
     36#define REG_RAM_R	0x1c
     37#define REG_DMA_BASE	0x40	/* regs for FE[i] = REG_DMA_BASE + 0x18 * i */
     38#define OFST_DMA_DESC_L	0x00
     39#define OFST_DMA_DESC_H	0x04
     40#define OFST_DMA_CTL	0x08
     41#define OFST_TS_CTL	0x0c
     42#define OFST_STATUS	0x10
     43#define OFST_TS_ERR	0x14
     44
     45/*
     46 * internal buffer for I2C
     47 */
     48#define PT3_I2C_MAX 4091
     49struct pt3_i2cbuf {
     50	u8  data[PT3_I2C_MAX];
     51	u8  tmp;
     52	u32 num_cmds;
     53};
     54
     55/*
     56 * DMA things
     57 */
     58#define TS_PACKET_SZ  188
     59/* DMA transfers must not cross 4GiB, so use one page / transfer */
     60#define DATA_XFER_SZ   4096
     61#define DATA_BUF_XFERS 47
     62/* (num_bufs * DATA_BUF_SZ) % TS_PACKET_SZ must be 0 */
     63#define DATA_BUF_SZ    (DATA_BUF_XFERS * DATA_XFER_SZ)
     64#define MAX_DATA_BUFS  16
     65#define MIN_DATA_BUFS   2
     66
     67#define DESCS_IN_PAGE (PAGE_SIZE / sizeof(struct xfer_desc))
     68#define MAX_NUM_XFERS (MAX_DATA_BUFS * DATA_BUF_XFERS)
     69#define MAX_DESC_BUFS DIV_ROUND_UP(MAX_NUM_XFERS, DESCS_IN_PAGE)
     70
     71/* DMA transfer description.
     72 * device is passed a pointer to this struct, dma-reads it,
     73 * and gets the DMA buffer ring for storing TS data.
     74 */
     75struct xfer_desc {
     76	u32 addr_l; /* bus address of target data buffer */
     77	u32 addr_h;
     78	u32 size;
     79	u32 next_l; /* bus address of the next xfer_desc */
     80	u32 next_h;
     81};
     82
     83/* A DMA mapping of a page containing xfer_desc's */
     84struct xfer_desc_buffer {
     85	dma_addr_t b_addr;
     86	struct xfer_desc *descs; /* PAGE_SIZE (xfer_desc[DESCS_IN_PAGE]) */
     87};
     88
     89/* A DMA mapping of a data buffer */
     90struct dma_data_buffer {
     91	dma_addr_t b_addr;
     92	u8 *data; /* size: u8[PAGE_SIZE] */
     93};
     94
     95/*
     96 * device things
     97 */
     98struct pt3_adap_config {
     99	struct i2c_board_info demod_info;
    100	struct tc90522_config demod_cfg;
    101
    102	struct i2c_board_info tuner_info;
    103	union tuner_config {
    104		struct qm1d1c0042_config qm1d1c0042;
    105		struct mxl301rf_config   mxl301rf;
    106	} tuner_cfg;
    107	u32 init_freq;
    108};
    109
    110struct pt3_adapter {
    111	struct dvb_adapter  dvb_adap;  /* dvb_adap.priv => struct pt3_board */
    112	int adap_idx;
    113
    114	struct dvb_demux    demux;
    115	struct dmxdev       dmxdev;
    116	struct dvb_frontend *fe;
    117	struct i2c_client   *i2c_demod;
    118	struct i2c_client   *i2c_tuner;
    119
    120	/* data fetch thread */
    121	struct task_struct *thread;
    122	int num_feeds;
    123
    124	bool cur_lna;
    125	bool cur_lnb; /* current LNB power status (on/off) */
    126
    127	/* items below are for DMA */
    128	struct dma_data_buffer buffer[MAX_DATA_BUFS];
    129	int buf_idx;
    130	int buf_ofs;
    131	int num_bufs;  /* == pt3_board->num_bufs */
    132	int num_discard; /* how many access units to discard initially */
    133
    134	struct xfer_desc_buffer desc_buf[MAX_DESC_BUFS];
    135	int num_desc_bufs;  /* == num_bufs * DATA_BUF_XFERS / DESCS_IN_PAGE */
    136};
    137
    138
    139struct pt3_board {
    140	struct pci_dev *pdev;
    141	void __iomem *regs[2];
    142	/* regs[0]: registers, regs[1]: internal memory, used for I2C */
    143
    144	struct mutex lock;
    145
    146	/* LNB power shared among sat-FEs */
    147	int lnb_on_cnt; /* LNB power on count */
    148
    149	/* LNA shared among terr-FEs */
    150	int lna_on_cnt; /* booster enabled count */
    151
    152	int num_bufs;  /* number of DMA buffers allocated/mapped per FE */
    153
    154	struct i2c_adapter i2c_adap;
    155	struct pt3_i2cbuf *i2c_buf;
    156
    157	struct pt3_adapter *adaps[PT3_NUM_FE];
    158};
    159
    160
    161/*
    162 * prototypes
    163 */
    164extern int  pt3_alloc_dmabuf(struct pt3_adapter *adap);
    165extern void pt3_init_dmabuf(struct pt3_adapter *adap);
    166extern void pt3_free_dmabuf(struct pt3_adapter *adap);
    167extern int  pt3_start_dma(struct pt3_adapter *adap);
    168extern int  pt3_stop_dma(struct pt3_adapter *adap);
    169extern int  pt3_proc_dma(struct pt3_adapter *adap);
    170
    171extern int  pt3_i2c_master_xfer(struct i2c_adapter *adap,
    172				struct i2c_msg *msgs, int num);
    173extern u32  pt3_i2c_functionality(struct i2c_adapter *adap);
    174extern void pt3_i2c_reset(struct pt3_board *pt3);
    175extern int  pt3_init_all_demods(struct pt3_board *pt3);
    176extern int  pt3_init_all_mxl301rf(struct pt3_board *pt3);
    177#endif /* PT3_H */