drivers/media/pci/pt3/pt3.h

   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
  49 struct 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  */
  75 struct 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 */
  84 struct 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 */
  90 struct dma_data_buffer {
  91         dma_addr_t b_addr;
  92         u8 *data; /* size: u8[PAGE_SIZE] */
  93 };
  94
  95 /*
  96  * device things
  97  */
  98 struct 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
 110 struct 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
 139 struct 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  */
 164 extern int  pt3_alloc_dmabuf(struct pt3_adapter *adap);
 165 extern void pt3_init_dmabuf(struct pt3_adapter *adap);
 166 extern void pt3_free_dmabuf(struct pt3_adapter *adap);
 167 extern int  pt3_start_dma(struct pt3_adapter *adap);
 168 extern int  pt3_stop_dma(struct pt3_adapter *adap);
 169 extern int  pt3_proc_dma(struct pt3_adapter *adap);
 170
 171 extern int  pt3_i2c_master_xfer(struct i2c_adapter *adap,
 172                                 struct i2c_msg *msgs, int num);
 173 extern u32  pt3_i2c_functionality(struct i2c_adapter *adap);
 174 extern void pt3_i2c_reset(struct pt3_board *pt3);
 175 extern int  pt3_init_all_demods(struct pt3_board *pt3);
 176 extern int  pt3_init_all_mxl301rf(struct pt3_board *pt3);
 177 #endif /* PT3_H */