187 lines
4.6 KiB
C
187 lines
4.6 KiB
C
/*
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* Earthsoft PT3 driver
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*
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* Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef PT3_H
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#define PT3_H
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#include <linux/atomic.h>
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#include <linux/types.h>
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#include "dvb_demux.h"
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#include "dvb_frontend.h"
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#include "dmxdev.h"
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#include "tc90522.h"
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#include "mxl301rf.h"
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#include "qm1d1c0042.h"
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#define DRV_NAME KBUILD_MODNAME
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#define PT3_NUM_FE 4
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/*
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* register index of the FPGA chip
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*/
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#define REG_VERSION 0x00
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#define REG_BUS 0x04
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#define REG_SYSTEM_W 0x08
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#define REG_SYSTEM_R 0x0c
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#define REG_I2C_W 0x10
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#define REG_I2C_R 0x14
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#define REG_RAM_W 0x18
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#define REG_RAM_R 0x1c
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#define REG_DMA_BASE 0x40 /* regs for FE[i] = REG_DMA_BASE + 0x18 * i */
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#define OFST_DMA_DESC_L 0x00
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#define OFST_DMA_DESC_H 0x04
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#define OFST_DMA_CTL 0x08
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#define OFST_TS_CTL 0x0c
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#define OFST_STATUS 0x10
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#define OFST_TS_ERR 0x14
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/*
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* internal buffer for I2C
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*/
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#define PT3_I2C_MAX 4091
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struct pt3_i2cbuf {
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u8 data[PT3_I2C_MAX];
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u8 tmp;
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u32 num_cmds;
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};
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/*
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* DMA things
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*/
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#define TS_PACKET_SZ 188
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/* DMA transfers must not cross 4GiB, so use one page / transfer */
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#define DATA_XFER_SZ 4096
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#define DATA_BUF_XFERS 47
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/* (num_bufs * DATA_BUF_SZ) % TS_PACKET_SZ must be 0 */
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#define DATA_BUF_SZ (DATA_BUF_XFERS * DATA_XFER_SZ)
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#define MAX_DATA_BUFS 16
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#define MIN_DATA_BUFS 2
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#define DESCS_IN_PAGE (PAGE_SIZE / sizeof(struct xfer_desc))
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#define MAX_NUM_XFERS (MAX_DATA_BUFS * DATA_BUF_XFERS)
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#define MAX_DESC_BUFS DIV_ROUND_UP(MAX_NUM_XFERS, DESCS_IN_PAGE)
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/* DMA transfer description.
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* device is passed a pointer to this struct, dma-reads it,
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* and gets the DMA buffer ring for storing TS data.
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*/
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struct xfer_desc {
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u32 addr_l; /* bus address of target data buffer */
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u32 addr_h;
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u32 size;
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u32 next_l; /* bus adddress of the next xfer_desc */
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u32 next_h;
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};
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/* A DMA mapping of a page containing xfer_desc's */
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struct xfer_desc_buffer {
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dma_addr_t b_addr;
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struct xfer_desc *descs; /* PAGE_SIZE (xfer_desc[DESCS_IN_PAGE]) */
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};
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/* A DMA mapping of a data buffer */
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struct dma_data_buffer {
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dma_addr_t b_addr;
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u8 *data; /* size: u8[PAGE_SIZE] */
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};
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/*
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* device things
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*/
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struct pt3_adap_config {
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struct i2c_board_info demod_info;
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struct tc90522_config demod_cfg;
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struct i2c_board_info tuner_info;
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union tuner_config {
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struct qm1d1c0042_config qm1d1c0042;
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struct mxl301rf_config mxl301rf;
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} tuner_cfg;
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u32 init_freq;
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};
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struct pt3_adapter {
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struct dvb_adapter dvb_adap; /* dvb_adap.priv => struct pt3_board */
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int adap_idx;
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struct dvb_demux demux;
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struct dmxdev dmxdev;
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struct dvb_frontend *fe;
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struct i2c_client *i2c_demod;
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struct i2c_client *i2c_tuner;
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/* data fetch thread */
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struct task_struct *thread;
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int num_feeds;
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bool cur_lna;
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bool cur_lnb; /* current LNB power status (on/off) */
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/* items below are for DMA */
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struct dma_data_buffer buffer[MAX_DATA_BUFS];
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int buf_idx;
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int buf_ofs;
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int num_bufs; /* == pt3_board->num_bufs */
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int num_discard; /* how many access units to discard initially */
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struct xfer_desc_buffer desc_buf[MAX_DESC_BUFS];
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int num_desc_bufs; /* == num_bufs * DATA_BUF_XFERS / DESCS_IN_PAGE */
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};
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struct pt3_board {
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struct pci_dev *pdev;
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void __iomem *regs[2];
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/* regs[0]: registers, regs[1]: internal memory, used for I2C */
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struct mutex lock;
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/* LNB power shared among sat-FEs */
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int lnb_on_cnt; /* LNB power on count */
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/* LNA shared among terr-FEs */
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int lna_on_cnt; /* booster enabled count */
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int num_bufs; /* number of DMA buffers allocated/mapped per FE */
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struct i2c_adapter i2c_adap;
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struct pt3_i2cbuf *i2c_buf;
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struct pt3_adapter *adaps[PT3_NUM_FE];
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};
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/*
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* prototypes
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*/
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extern int pt3_alloc_dmabuf(struct pt3_adapter *adap);
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extern void pt3_init_dmabuf(struct pt3_adapter *adap);
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extern void pt3_free_dmabuf(struct pt3_adapter *adap);
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extern int pt3_start_dma(struct pt3_adapter *adap);
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extern int pt3_stop_dma(struct pt3_adapter *adap);
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extern int pt3_proc_dma(struct pt3_adapter *adap);
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extern int pt3_i2c_master_xfer(struct i2c_adapter *adap,
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struct i2c_msg *msgs, int num);
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extern u32 pt3_i2c_functionality(struct i2c_adapter *adap);
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extern void pt3_i2c_reset(struct pt3_board *pt3);
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extern int pt3_init_all_demods(struct pt3_board *pt3);
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extern int pt3_init_all_mxl301rf(struct pt3_board *pt3);
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#endif /* PT3_H */
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