562 lines
16 KiB
C
Executable file
562 lines
16 KiB
C
Executable file
/*
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* AD1843 low level driver
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*
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* Copyright 2003 Vivien Chappelier <vivien.chappelier@linux-mips.org>
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* Copyright 2008 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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*
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* inspired from vwsnd.c (SGI VW audio driver)
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* Copyright 1999 Silicon Graphics, Inc. All rights reserved.
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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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/errno.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/ad1843.h>
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/*
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* AD1843 bitfield definitions. All are named as in the AD1843 data
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* sheet, with ad1843_ prepended and individual bit numbers removed.
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*
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* E.g., bits LSS0 through LSS2 become ad1843_LSS.
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*
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* Only the bitfields we need are defined.
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*/
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struct ad1843_bitfield {
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char reg;
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char lo_bit;
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char nbits;
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};
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static const struct ad1843_bitfield
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ad1843_PDNO = { 0, 14, 1 }, /* Converter Power-Down Flag */
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ad1843_INIT = { 0, 15, 1 }, /* Clock Initialization Flag */
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ad1843_RIG = { 2, 0, 4 }, /* Right ADC Input Gain */
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ad1843_RMGE = { 2, 4, 1 }, /* Right ADC Mic Gain Enable */
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ad1843_RSS = { 2, 5, 3 }, /* Right ADC Source Select */
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ad1843_LIG = { 2, 8, 4 }, /* Left ADC Input Gain */
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ad1843_LMGE = { 2, 12, 1 }, /* Left ADC Mic Gain Enable */
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ad1843_LSS = { 2, 13, 3 }, /* Left ADC Source Select */
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ad1843_RD2M = { 3, 0, 5 }, /* Right DAC 2 Mix Gain/Atten */
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ad1843_RD2MM = { 3, 7, 1 }, /* Right DAC 2 Mix Mute */
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ad1843_LD2M = { 3, 8, 5 }, /* Left DAC 2 Mix Gain/Atten */
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ad1843_LD2MM = { 3, 15, 1 }, /* Left DAC 2 Mix Mute */
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ad1843_RX1M = { 4, 0, 5 }, /* Right Aux 1 Mix Gain/Atten */
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ad1843_RX1MM = { 4, 7, 1 }, /* Right Aux 1 Mix Mute */
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ad1843_LX1M = { 4, 8, 5 }, /* Left Aux 1 Mix Gain/Atten */
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ad1843_LX1MM = { 4, 15, 1 }, /* Left Aux 1 Mix Mute */
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ad1843_RX2M = { 5, 0, 5 }, /* Right Aux 2 Mix Gain/Atten */
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ad1843_RX2MM = { 5, 7, 1 }, /* Right Aux 2 Mix Mute */
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ad1843_LX2M = { 5, 8, 5 }, /* Left Aux 2 Mix Gain/Atten */
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ad1843_LX2MM = { 5, 15, 1 }, /* Left Aux 2 Mix Mute */
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ad1843_RMCM = { 7, 0, 5 }, /* Right Mic Mix Gain/Atten */
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ad1843_RMCMM = { 7, 7, 1 }, /* Right Mic Mix Mute */
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ad1843_LMCM = { 7, 8, 5 }, /* Left Mic Mix Gain/Atten */
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ad1843_LMCMM = { 7, 15, 1 }, /* Left Mic Mix Mute */
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ad1843_HPOS = { 8, 4, 1 }, /* Headphone Output Voltage Swing */
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ad1843_HPOM = { 8, 5, 1 }, /* Headphone Output Mute */
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ad1843_MPOM = { 8, 6, 1 }, /* Mono Output Mute */
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ad1843_RDA1G = { 9, 0, 6 }, /* Right DAC1 Analog/Digital Gain */
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ad1843_RDA1GM = { 9, 7, 1 }, /* Right DAC1 Analog Mute */
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ad1843_LDA1G = { 9, 8, 6 }, /* Left DAC1 Analog/Digital Gain */
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ad1843_LDA1GM = { 9, 15, 1 }, /* Left DAC1 Analog Mute */
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ad1843_RDA2G = { 10, 0, 6 }, /* Right DAC2 Analog/Digital Gain */
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ad1843_RDA2GM = { 10, 7, 1 }, /* Right DAC2 Analog Mute */
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ad1843_LDA2G = { 10, 8, 6 }, /* Left DAC2 Analog/Digital Gain */
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ad1843_LDA2GM = { 10, 15, 1 }, /* Left DAC2 Analog Mute */
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ad1843_RDA1AM = { 11, 7, 1 }, /* Right DAC1 Digital Mute */
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ad1843_LDA1AM = { 11, 15, 1 }, /* Left DAC1 Digital Mute */
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ad1843_RDA2AM = { 12, 7, 1 }, /* Right DAC2 Digital Mute */
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ad1843_LDA2AM = { 12, 15, 1 }, /* Left DAC2 Digital Mute */
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ad1843_ADLC = { 15, 0, 2 }, /* ADC Left Sample Rate Source */
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ad1843_ADRC = { 15, 2, 2 }, /* ADC Right Sample Rate Source */
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ad1843_DA1C = { 15, 8, 2 }, /* DAC1 Sample Rate Source */
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ad1843_DA2C = { 15, 10, 2 }, /* DAC2 Sample Rate Source */
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ad1843_C1C = { 17, 0, 16 }, /* Clock 1 Sample Rate Select */
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ad1843_C2C = { 20, 0, 16 }, /* Clock 2 Sample Rate Select */
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ad1843_C3C = { 23, 0, 16 }, /* Clock 3 Sample Rate Select */
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ad1843_DAADL = { 25, 4, 2 }, /* Digital ADC Left Source Select */
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ad1843_DAADR = { 25, 6, 2 }, /* Digital ADC Right Source Select */
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ad1843_DAMIX = { 25, 14, 1 }, /* DAC Digital Mix Enable */
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ad1843_DRSFLT = { 25, 15, 1 }, /* Digital Reampler Filter Mode */
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ad1843_ADLF = { 26, 0, 2 }, /* ADC Left Channel Data Format */
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ad1843_ADRF = { 26, 2, 2 }, /* ADC Right Channel Data Format */
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ad1843_ADTLK = { 26, 4, 1 }, /* ADC Transmit Lock Mode Select */
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ad1843_SCF = { 26, 7, 1 }, /* SCLK Frequency Select */
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ad1843_DA1F = { 26, 8, 2 }, /* DAC1 Data Format Select */
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ad1843_DA2F = { 26, 10, 2 }, /* DAC2 Data Format Select */
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ad1843_DA1SM = { 26, 14, 1 }, /* DAC1 Stereo/Mono Mode Select */
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ad1843_DA2SM = { 26, 15, 1 }, /* DAC2 Stereo/Mono Mode Select */
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ad1843_ADLEN = { 27, 0, 1 }, /* ADC Left Channel Enable */
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ad1843_ADREN = { 27, 1, 1 }, /* ADC Right Channel Enable */
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ad1843_AAMEN = { 27, 4, 1 }, /* Analog to Analog Mix Enable */
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ad1843_ANAEN = { 27, 7, 1 }, /* Analog Channel Enable */
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ad1843_DA1EN = { 27, 8, 1 }, /* DAC1 Enable */
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ad1843_DA2EN = { 27, 9, 1 }, /* DAC2 Enable */
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ad1843_DDMEN = { 27, 12, 1 }, /* DAC2 to DAC1 Mix Enable */
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ad1843_C1EN = { 28, 11, 1 }, /* Clock Generator 1 Enable */
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ad1843_C2EN = { 28, 12, 1 }, /* Clock Generator 2 Enable */
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ad1843_C3EN = { 28, 13, 1 }, /* Clock Generator 3 Enable */
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ad1843_PDNI = { 28, 15, 1 }; /* Converter Power Down */
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/*
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* The various registers of the AD1843 use three different formats for
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* specifying gain. The ad1843_gain structure parameterizes the
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* formats.
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*/
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struct ad1843_gain {
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int negative; /* nonzero if gain is negative. */
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const struct ad1843_bitfield *lfield;
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const struct ad1843_bitfield *rfield;
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const struct ad1843_bitfield *lmute;
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const struct ad1843_bitfield *rmute;
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};
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static const struct ad1843_gain ad1843_gain_RECLEV = {
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.negative = 0,
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.lfield = &ad1843_LIG,
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.rfield = &ad1843_RIG
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};
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static const struct ad1843_gain ad1843_gain_LINE = {
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.negative = 1,
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.lfield = &ad1843_LX1M,
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.rfield = &ad1843_RX1M,
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.lmute = &ad1843_LX1MM,
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.rmute = &ad1843_RX1MM
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};
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static const struct ad1843_gain ad1843_gain_LINE_2 = {
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.negative = 1,
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.lfield = &ad1843_LDA2G,
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.rfield = &ad1843_RDA2G,
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.lmute = &ad1843_LDA2GM,
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.rmute = &ad1843_RDA2GM
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};
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static const struct ad1843_gain ad1843_gain_MIC = {
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.negative = 1,
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.lfield = &ad1843_LMCM,
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.rfield = &ad1843_RMCM,
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.lmute = &ad1843_LMCMM,
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.rmute = &ad1843_RMCMM
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};
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static const struct ad1843_gain ad1843_gain_PCM_0 = {
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.negative = 1,
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.lfield = &ad1843_LDA1G,
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.rfield = &ad1843_RDA1G,
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.lmute = &ad1843_LDA1GM,
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.rmute = &ad1843_RDA1GM
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};
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static const struct ad1843_gain ad1843_gain_PCM_1 = {
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.negative = 1,
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.lfield = &ad1843_LD2M,
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.rfield = &ad1843_RD2M,
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.lmute = &ad1843_LD2MM,
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.rmute = &ad1843_RD2MM
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};
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static const struct ad1843_gain *ad1843_gain[AD1843_GAIN_SIZE] =
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{
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&ad1843_gain_RECLEV,
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&ad1843_gain_LINE,
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&ad1843_gain_LINE_2,
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&ad1843_gain_MIC,
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&ad1843_gain_PCM_0,
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&ad1843_gain_PCM_1,
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};
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/* read the current value of an AD1843 bitfield. */
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static int ad1843_read_bits(struct snd_ad1843 *ad1843,
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const struct ad1843_bitfield *field)
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{
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int w;
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w = ad1843->read(ad1843->chip, field->reg);
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return w >> field->lo_bit & ((1 << field->nbits) - 1);
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}
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/*
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* write a new value to an AD1843 bitfield and return the old value.
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*/
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static int ad1843_write_bits(struct snd_ad1843 *ad1843,
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const struct ad1843_bitfield *field,
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int newval)
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{
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int w, mask, oldval, newbits;
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w = ad1843->read(ad1843->chip, field->reg);
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mask = ((1 << field->nbits) - 1) << field->lo_bit;
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oldval = (w & mask) >> field->lo_bit;
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newbits = (newval << field->lo_bit) & mask;
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w = (w & ~mask) | newbits;
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ad1843->write(ad1843->chip, field->reg, w);
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return oldval;
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}
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/*
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* ad1843_read_multi reads multiple bitfields from the same AD1843
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* register. It uses a single read cycle to do it. (Reading the
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* ad1843 requires 256 bit times at 12.288 MHz, or nearly 20
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* microseconds.)
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*
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* Called like this.
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*
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* ad1843_read_multi(ad1843, nfields,
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* &ad1843_FIELD1, &val1,
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* &ad1843_FIELD2, &val2, ...);
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*/
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static void ad1843_read_multi(struct snd_ad1843 *ad1843, int argcount, ...)
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{
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va_list ap;
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const struct ad1843_bitfield *fp;
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int w = 0, mask, *value, reg = -1;
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va_start(ap, argcount);
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while (--argcount >= 0) {
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fp = va_arg(ap, const struct ad1843_bitfield *);
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value = va_arg(ap, int *);
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if (reg == -1) {
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reg = fp->reg;
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w = ad1843->read(ad1843->chip, reg);
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}
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mask = (1 << fp->nbits) - 1;
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*value = w >> fp->lo_bit & mask;
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}
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va_end(ap);
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}
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/*
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* ad1843_write_multi stores multiple bitfields into the same AD1843
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* register. It uses one read and one write cycle to do it.
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*
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* Called like this.
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*
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* ad1843_write_multi(ad1843, nfields,
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* &ad1843_FIELD1, val1,
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* &ad1843_FIELF2, val2, ...);
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*/
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static void ad1843_write_multi(struct snd_ad1843 *ad1843, int argcount, ...)
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{
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va_list ap;
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int reg;
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const struct ad1843_bitfield *fp;
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int value;
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int w, m, mask, bits;
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mask = 0;
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bits = 0;
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reg = -1;
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va_start(ap, argcount);
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while (--argcount >= 0) {
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fp = va_arg(ap, const struct ad1843_bitfield *);
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value = va_arg(ap, int);
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if (reg == -1)
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reg = fp->reg;
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else
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WARN_ON(reg != fp->reg);
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m = ((1 << fp->nbits) - 1) << fp->lo_bit;
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mask |= m;
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bits |= (value << fp->lo_bit) & m;
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}
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va_end(ap);
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if (~mask & 0xFFFF)
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w = ad1843->read(ad1843->chip, reg);
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else
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w = 0;
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w = (w & ~mask) | bits;
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ad1843->write(ad1843->chip, reg, w);
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}
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int ad1843_get_gain_max(struct snd_ad1843 *ad1843, int id)
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{
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const struct ad1843_gain *gp = ad1843_gain[id];
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int ret;
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ret = (1 << gp->lfield->nbits);
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if (!gp->lmute)
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ret -= 1;
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return ret;
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}
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/*
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* ad1843_get_gain reads the specified register and extracts the gain value
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* using the supplied gain type.
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*/
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int ad1843_get_gain(struct snd_ad1843 *ad1843, int id)
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{
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int lg, rg, lm, rm;
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const struct ad1843_gain *gp = ad1843_gain[id];
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unsigned short mask = (1 << gp->lfield->nbits) - 1;
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ad1843_read_multi(ad1843, 2, gp->lfield, &lg, gp->rfield, &rg);
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if (gp->negative) {
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lg = mask - lg;
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rg = mask - rg;
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}
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if (gp->lmute) {
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ad1843_read_multi(ad1843, 2, gp->lmute, &lm, gp->rmute, &rm);
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if (lm)
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lg = 0;
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if (rm)
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rg = 0;
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}
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return lg << 0 | rg << 8;
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}
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/*
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* Set an audio channel's gain.
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*
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* Returns the new gain, which may be lower than the old gain.
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*/
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int ad1843_set_gain(struct snd_ad1843 *ad1843, int id, int newval)
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{
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const struct ad1843_gain *gp = ad1843_gain[id];
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unsigned short mask = (1 << gp->lfield->nbits) - 1;
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int lg = (newval >> 0) & mask;
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int rg = (newval >> 8) & mask;
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int lm = (lg == 0) ? 1 : 0;
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int rm = (rg == 0) ? 1 : 0;
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if (gp->negative) {
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lg = mask - lg;
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rg = mask - rg;
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}
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if (gp->lmute)
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ad1843_write_multi(ad1843, 2, gp->lmute, lm, gp->rmute, rm);
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ad1843_write_multi(ad1843, 2, gp->lfield, lg, gp->rfield, rg);
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return ad1843_get_gain(ad1843, id);
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}
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/* Returns the current recording source */
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int ad1843_get_recsrc(struct snd_ad1843 *ad1843)
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{
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int val = ad1843_read_bits(ad1843, &ad1843_LSS);
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if (val < 0 || val > 2) {
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val = 2;
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ad1843_write_multi(ad1843, 2,
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&ad1843_LSS, val, &ad1843_RSS, val);
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}
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return val;
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}
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/*
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* Set recording source.
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*
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* Returns newsrc on success, -errno on failure.
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*/
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int ad1843_set_recsrc(struct snd_ad1843 *ad1843, int newsrc)
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{
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if (newsrc < 0 || newsrc > 2)
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return -EINVAL;
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ad1843_write_multi(ad1843, 2, &ad1843_LSS, newsrc, &ad1843_RSS, newsrc);
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return newsrc;
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}
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/* Setup ad1843 for D/A conversion. */
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void ad1843_setup_dac(struct snd_ad1843 *ad1843,
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unsigned int id,
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unsigned int framerate,
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snd_pcm_format_t fmt,
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unsigned int channels)
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{
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int ad_fmt = 0, ad_mode = 0;
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switch (fmt) {
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case SNDRV_PCM_FORMAT_S8:
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ad_fmt = 0;
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break;
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case SNDRV_PCM_FORMAT_U8:
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ad_fmt = 0;
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break;
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case SNDRV_PCM_FORMAT_S16_LE:
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ad_fmt = 1;
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break;
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case SNDRV_PCM_FORMAT_MU_LAW:
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ad_fmt = 2;
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break;
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case SNDRV_PCM_FORMAT_A_LAW:
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ad_fmt = 3;
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break;
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default:
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break;
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}
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switch (channels) {
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case 2:
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ad_mode = 0;
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break;
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case 1:
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ad_mode = 1;
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break;
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default:
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break;
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}
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if (id) {
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ad1843_write_bits(ad1843, &ad1843_C2C, framerate);
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ad1843_write_multi(ad1843, 2,
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&ad1843_DA2SM, ad_mode,
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&ad1843_DA2F, ad_fmt);
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} else {
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ad1843_write_bits(ad1843, &ad1843_C1C, framerate);
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ad1843_write_multi(ad1843, 2,
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&ad1843_DA1SM, ad_mode,
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&ad1843_DA1F, ad_fmt);
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}
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}
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void ad1843_shutdown_dac(struct snd_ad1843 *ad1843, unsigned int id)
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{
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if (id)
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ad1843_write_bits(ad1843, &ad1843_DA2F, 1);
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else
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ad1843_write_bits(ad1843, &ad1843_DA1F, 1);
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}
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void ad1843_setup_adc(struct snd_ad1843 *ad1843,
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unsigned int framerate,
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snd_pcm_format_t fmt,
|
|
unsigned int channels)
|
|
{
|
|
int da_fmt = 0;
|
|
|
|
switch (fmt) {
|
|
case SNDRV_PCM_FORMAT_S8: da_fmt = 0; break;
|
|
case SNDRV_PCM_FORMAT_U8: da_fmt = 0; break;
|
|
case SNDRV_PCM_FORMAT_S16_LE: da_fmt = 1; break;
|
|
case SNDRV_PCM_FORMAT_MU_LAW: da_fmt = 2; break;
|
|
case SNDRV_PCM_FORMAT_A_LAW: da_fmt = 3; break;
|
|
default: break;
|
|
}
|
|
|
|
ad1843_write_bits(ad1843, &ad1843_C3C, framerate);
|
|
ad1843_write_multi(ad1843, 2,
|
|
&ad1843_ADLF, da_fmt, &ad1843_ADRF, da_fmt);
|
|
}
|
|
|
|
void ad1843_shutdown_adc(struct snd_ad1843 *ad1843)
|
|
{
|
|
/* nothing to do */
|
|
}
|
|
|
|
/*
|
|
* Fully initialize the ad1843. As described in the AD1843 data
|
|
* sheet, section "START-UP SEQUENCE". The numbered comments are
|
|
* subsection headings from the data sheet. See the data sheet, pages
|
|
* 52-54, for more info.
|
|
*
|
|
* return 0 on success, -errno on failure. */
|
|
|
|
int ad1843_init(struct snd_ad1843 *ad1843)
|
|
{
|
|
unsigned long later;
|
|
|
|
if (ad1843_read_bits(ad1843, &ad1843_INIT) != 0) {
|
|
printk(KERN_ERR "ad1843: AD1843 won't initialize\n");
|
|
return -EIO;
|
|
}
|
|
|
|
ad1843_write_bits(ad1843, &ad1843_SCF, 1);
|
|
|
|
/* 4. Put the conversion resources into standby. */
|
|
ad1843_write_bits(ad1843, &ad1843_PDNI, 0);
|
|
later = jiffies + msecs_to_jiffies(500);
|
|
|
|
while (ad1843_read_bits(ad1843, &ad1843_PDNO)) {
|
|
if (time_after(jiffies, later)) {
|
|
printk(KERN_ERR
|
|
"ad1843: AD1843 won't power up\n");
|
|
return -EIO;
|
|
}
|
|
schedule_timeout_interruptible(5);
|
|
}
|
|
|
|
/* 5. Power up the clock generators and enable clock output pins. */
|
|
ad1843_write_multi(ad1843, 3,
|
|
&ad1843_C1EN, 1,
|
|
&ad1843_C2EN, 1,
|
|
&ad1843_C3EN, 1);
|
|
|
|
/* 6. Configure conversion resources while they are in standby. */
|
|
|
|
/* DAC1/2 use clock 1/2 as source, ADC uses clock 3. Always. */
|
|
ad1843_write_multi(ad1843, 4,
|
|
&ad1843_DA1C, 1,
|
|
&ad1843_DA2C, 2,
|
|
&ad1843_ADLC, 3,
|
|
&ad1843_ADRC, 3);
|
|
|
|
/* 7. Enable conversion resources. */
|
|
ad1843_write_bits(ad1843, &ad1843_ADTLK, 1);
|
|
ad1843_write_multi(ad1843, 7,
|
|
&ad1843_ANAEN, 1,
|
|
&ad1843_AAMEN, 1,
|
|
&ad1843_DA1EN, 1,
|
|
&ad1843_DA2EN, 1,
|
|
&ad1843_DDMEN, 1,
|
|
&ad1843_ADLEN, 1,
|
|
&ad1843_ADREN, 1);
|
|
|
|
/* 8. Configure conversion resources while they are enabled. */
|
|
|
|
/* set gain to 0 for all channels */
|
|
ad1843_set_gain(ad1843, AD1843_GAIN_RECLEV, 0);
|
|
ad1843_set_gain(ad1843, AD1843_GAIN_LINE, 0);
|
|
ad1843_set_gain(ad1843, AD1843_GAIN_LINE_2, 0);
|
|
ad1843_set_gain(ad1843, AD1843_GAIN_MIC, 0);
|
|
ad1843_set_gain(ad1843, AD1843_GAIN_PCM_0, 0);
|
|
ad1843_set_gain(ad1843, AD1843_GAIN_PCM_1, 0);
|
|
|
|
/* Unmute all channels. */
|
|
/* DAC1 */
|
|
ad1843_write_multi(ad1843, 2, &ad1843_LDA1GM, 0, &ad1843_RDA1GM, 0);
|
|
/* DAC2 */
|
|
ad1843_write_multi(ad1843, 2, &ad1843_LDA2GM, 0, &ad1843_RDA2GM, 0);
|
|
|
|
/* Set default recording source to Line In and set
|
|
* mic gain to +20 dB.
|
|
*/
|
|
ad1843_set_recsrc(ad1843, 2);
|
|
ad1843_write_multi(ad1843, 2, &ad1843_LMGE, 1, &ad1843_RMGE, 1);
|
|
|
|
/* Set Speaker Out level to +/- 4V and unmute it. */
|
|
ad1843_write_multi(ad1843, 3,
|
|
&ad1843_HPOS, 1,
|
|
&ad1843_HPOM, 0,
|
|
&ad1843_MPOM, 0);
|
|
|
|
return 0;
|
|
}
|