drivers/media/pci/pt3/pt3.h

   1 /*
   2  * Earthsoft PT3 driver
   3  *
   4  * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation version 2.
   9  *
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #ifndef PT3_H
  18 #define PT3_H
  19
  20 #include <linux/atomic.h>
  21 #include <linux/types.h>
  22
  23 #include <media/dvb_demux.h>
  24 #include <media/dvb_frontend.h>
  25 #include <media/dmxdev.h>
  26
  27 #include "tc90522.h"
  28 #include "mxl301rf.h"
  29 #include "qm1d1c0042.h"
  30
  31 #define DRV_NAME KBUILD_MODNAME
  32
  33 #define PT3_NUM_FE 4
  34
  35 /*
  36  * register index of the FPGA chip
  37  */
  38 #define REG_VERSION     0x00
  39 #define REG_BUS         0x04
  40 #define REG_SYSTEM_W    0x08
  41 #define REG_SYSTEM_R    0x0c
  42 #define REG_I2C_W       0x10
  43 #define REG_I2C_R       0x14
  44 #define REG_RAM_W       0x18
  45 #define REG_RAM_R       0x1c
  46 #define REG_DMA_BASE    0x40    /* regs for FE[i] = REG_DMA_BASE + 0x18 * i */
  47 #define OFST_DMA_DESC_L 0x00
  48 #define OFST_DMA_DESC_H 0x04
  49 #define OFST_DMA_CTL    0x08
  50 #define OFST_TS_CTL     0x0c
  51 #define OFST_STATUS     0x10
  52 #define OFST_TS_ERR     0x14
  53
  54 /*
  55  * internal buffer for I2C
  56  */
  57 #define PT3_I2C_MAX 4091
  58 struct pt3_i2cbuf {
  59         u8  data[PT3_I2C_MAX];
  60         u8  tmp;
  61         u32 num_cmds;
  62 };
  63
  64 /*
  65  * DMA things
  66  */
  67 #define TS_PACKET_SZ  188
  68 /* DMA transfers must not cross 4GiB, so use one page / transfer */
  69 #define DATA_XFER_SZ   4096
  70 #define DATA_BUF_XFERS 47
  71 /* (num_bufs * DATA_BUF_SZ) % TS_PACKET_SZ must be 0 */
  72 #define DATA_BUF_SZ    (DATA_BUF_XFERS * DATA_XFER_SZ)
  73 #define MAX_DATA_BUFS  16
  74 #define MIN_DATA_BUFS   2
  75
  76 #define DESCS_IN_PAGE (PAGE_SIZE / sizeof(struct xfer_desc))
  77 #define MAX_NUM_XFERS (MAX_DATA_BUFS * DATA_BUF_XFERS)
  78 #define MAX_DESC_BUFS DIV_ROUND_UP(MAX_NUM_XFERS, DESCS_IN_PAGE)
  79
  80 /* DMA transfer description.
  81  * device is passed a pointer to this struct, dma-reads it,
  82  * and gets the DMA buffer ring for storing TS data.
  83  */
  84 struct xfer_desc {
  85         u32 addr_l; /* bus address of target data buffer */
  86         u32 addr_h;
  87         u32 size;
  88         u32 next_l; /* bus adddress of the next xfer_desc */
  89         u32 next_h;
  90 };
  91
  92 /* A DMA mapping of a page containing xfer_desc's */
  93 struct xfer_desc_buffer {
  94         dma_addr_t b_addr;
  95         struct xfer_desc *descs; /* PAGE_SIZE (xfer_desc[DESCS_IN_PAGE]) */
  96 };
  97
  98 /* A DMA mapping of a data buffer */
  99 struct dma_data_buffer {
 100         dma_addr_t b_addr;
 101         u8 *data; /* size: u8[PAGE_SIZE] */
 102 };
 103
 104 /*
 105  * device things
 106  */
 107 struct pt3_adap_config {
 108         struct i2c_board_info demod_info;
 109         struct tc90522_config demod_cfg;
 110
 111         struct i2c_board_info tuner_info;
 112         union tuner_config {
 113                 struct qm1d1c0042_config qm1d1c0042;
 114                 struct mxl301rf_config   mxl301rf;
 115         } tuner_cfg;
 116         u32 init_freq;
 117 };
 118
 119 struct pt3_adapter {
 120         struct dvb_adapter  dvb_adap;  /* dvb_adap.priv => struct pt3_board */
 121         int adap_idx;
 122
 123         struct dvb_demux    demux;
 124         struct dmxdev       dmxdev;
 125         struct dvb_frontend *fe;
 126         struct i2c_client   *i2c_demod;
 127         struct i2c_client   *i2c_tuner;
 128
 129         /* data fetch thread */
 130         struct task_struct *thread;
 131         int num_feeds;
 132
 133         bool cur_lna;
 134         bool cur_lnb; /* current LNB power status (on/off) */
 135
 136         /* items below are for DMA */
 137         struct dma_data_buffer buffer[MAX_DATA_BUFS];
 138         int buf_idx;
 139         int buf_ofs;
 140         int num_bufs;  /* == pt3_board->num_bufs */
 141         int num_discard; /* how many access units to discard initially */
 142
 143         struct xfer_desc_buffer desc_buf[MAX_DESC_BUFS];
 144         int num_desc_bufs;  /* == num_bufs * DATA_BUF_XFERS / DESCS_IN_PAGE */
 145 };
 146
 147
 148 struct pt3_board {
 149         struct pci_dev *pdev;
 150         void __iomem *regs[2];
 151         /* regs[0]: registers, regs[1]: internal memory, used for I2C */
 152
 153         struct mutex lock;
 154
 155         /* LNB power shared among sat-FEs */
 156         int lnb_on_cnt; /* LNB power on count */
 157
 158         /* LNA shared among terr-FEs */
 159         int lna_on_cnt; /* booster enabled count */
 160
 161         int num_bufs;  /* number of DMA buffers allocated/mapped per FE */
 162
 163         struct i2c_adapter i2c_adap;
 164         struct pt3_i2cbuf *i2c_buf;
 165
 166         struct pt3_adapter *adaps[PT3_NUM_FE];
 167 };
 168
 169
 170 /*
 171  * prototypes
 172  */
 173 extern int  pt3_alloc_dmabuf(struct pt3_adapter *adap);
 174 extern void pt3_init_dmabuf(struct pt3_adapter *adap);
 175 extern void pt3_free_dmabuf(struct pt3_adapter *adap);
 176 extern int  pt3_start_dma(struct pt3_adapter *adap);
 177 extern int  pt3_stop_dma(struct pt3_adapter *adap);
 178 extern int  pt3_proc_dma(struct pt3_adapter *adap);
 179
 180 extern int  pt3_i2c_master_xfer(struct i2c_adapter *adap,
 181                                 struct i2c_msg *msgs, int num);
 182 extern u32  pt3_i2c_functionality(struct i2c_adapter *adap);
 183 extern void pt3_i2c_reset(struct pt3_board *pt3);
 184 extern int  pt3_init_all_demods(struct pt3_board *pt3);
 185 extern int  pt3_init_all_mxl301rf(struct pt3_board *pt3);
 186 #endif /* PT3_H */