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 */ 178