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113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
//
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// Copyright (C) 2017 Markus Hiienkari <mhiienka@niksula.hut.fi>
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//
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// This file is part of Open Source Scan Converter project.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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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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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#include <stdio.h>
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#include <unistd.h>
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#include "system.h"
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#include "i2c_opencores.h"
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#include "pcm1862.h"
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inline alt_u32 pcm1862_readreg(alt_u8 regaddr)
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{
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//Phase 1
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I2C_start(I2CA_BASE, PCM1862_BASE, 0);
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I2C_write(I2CA_BASE, regaddr, 0);
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//Phase 2
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I2C_start(I2CA_BASE, PCM1862_BASE, 1);
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return I2C_read(I2CA_BASE,1);
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}
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inline void pcm1862_writereg(alt_u8 regaddr, alt_u8 data)
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{
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I2C_start(I2CA_BASE, PCM1862_BASE, 0);
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I2C_write(I2CA_BASE, regaddr, 0);
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I2C_write(I2CA_BASE, data, 1);
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}
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void pcm_source_sel(pcm_input_t input) {
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alt_u8 adc_ch = 1<<input;
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pcm1862_writereg(PCM1862_ADC1L, (1<<6)|adc_ch);
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pcm1862_writereg(PCM1862_ADC1R, (1<<6)|adc_ch);
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}
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void pcm_set_stereo_mode(int mono_enable) {
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uint32_t gain;
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int i;
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const uint8_t chregs[] = {0, 1, 6, 7};
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uint32_t stereo_cfg[] = {0x100000, 0x0, 0x0, 0x100000};
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uint32_t mono_cfg[] = {0x0804DC, 0x0804DC, 0x0804DC, 0x0804DC};
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uint32_t *ch_cfg = mono_enable ? mono_cfg : stereo_cfg;
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pcm1862_writereg(PCM1862_PAGESEL, 1);
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for (i=0; i<sizeof(chregs); i++) {
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pcm1862_writereg(PCM1862_DSP2_ADDR, chregs[i]);
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pcm1862_writereg(PCM1862_DSP2_WDATA0, (ch_cfg[i] >> 16) & 0xff);
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pcm1862_writereg(PCM1862_DSP2_WDATA1, (ch_cfg[i] >> 8) & 0xff);
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pcm1862_writereg(PCM1862_DSP2_WDATA2, ch_cfg[i] & 0xff);
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pcm1862_writereg(PCM1862_DSP2_CFG, (1<<0));
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while ((pcm1862_readreg(PCM1862_DSP2_CFG) & ((1<<0)|(1<<2))) != 0) {}
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}
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/*for (i=0; i<12; i++) {
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pcm1862_writereg(0x02, i);
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pcm1862_writereg(0x01, (1<<1));
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while ((pcm1862_readreg(0x01) & (1<<1)) != 0) {}
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gain = pcm1862_readreg(0x08) << 16;
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gain |= pcm1862_readreg(0x09) << 8;
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gain |= pcm1862_readreg(0x0A);
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printf("ch%u gain: 0x%x\n", i, gain);
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}*/
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pcm1862_writereg(PCM1862_PAGESEL, 0);
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}
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void pcm_set_gain(alt_8 db_gain) {
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alt_8 gain_val = 2*db_gain;
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pcm1862_writereg(PCM1862_PGA1L, gain_val);
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pcm1862_writereg(PCM1862_PGA1R, gain_val);
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}
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int pcm1862_init()
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{
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if (pcm1862_readreg(0x05) != 0x86)
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return 0;
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pcm1862_writereg(PCM1862_PWR_CTRL, 0x75);
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//pcm1862_writereg(0x00, 0xff);
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pcm1862_writereg(PCM1862_CLKCONFIG, 0x90);
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pcm1862_writereg(PCM1862_DSP1_CLKDIV, 0x00);
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pcm1862_writereg(PCM1862_DSP2_CLKDIV, 0x00);
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pcm1862_writereg(PCM1862_ADC_CLKDIV, 0x03);
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pcm1862_writereg(PCM1862_PLLCONFIG, 0x00);
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pcm1862_writereg(PCM1862_DSP_CTRL, 0xB0);
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pcm1862_writereg(PCM1862_PWR_CTRL, 0x70);
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return 1;
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}
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