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 */ 187