forked from Minki/linux
608b10bad3
err is always assigned before it is used, no need to declare another inside the if statement. sound/pci/ac97/ac97_pcm.c:577:7: warning: symbol 'err' shadows an earlier one sound/pci/ac97/ac97_pcm.c:572:6: originally declared here Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
737 lines
21 KiB
C
737 lines
21 KiB
C
/*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* Universal interface for Audio Codec '97
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*
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* For more details look to AC '97 component specification revision 2.2
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* by Intel Corporation (http://developer.intel.com) and to datasheets
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* for specific codecs.
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*
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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/delay.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/mutex.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/control.h>
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#include <sound/ac97_codec.h>
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#include <sound/asoundef.h>
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#include "ac97_id.h"
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#include "ac97_local.h"
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/*
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* PCM support
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*/
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static unsigned char rate_reg_tables[2][4][9] = {
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{
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/* standard rates */
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{
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/* 3&4 front, 7&8 rear, 6&9 center/lfe */
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AC97_PCM_FRONT_DAC_RATE, /* slot 3 */
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AC97_PCM_FRONT_DAC_RATE, /* slot 4 */
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0xff, /* slot 5 */
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AC97_PCM_LFE_DAC_RATE, /* slot 6 */
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AC97_PCM_SURR_DAC_RATE, /* slot 7 */
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AC97_PCM_SURR_DAC_RATE, /* slot 8 */
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AC97_PCM_LFE_DAC_RATE, /* slot 9 */
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0xff, /* slot 10 */
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0xff, /* slot 11 */
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},
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{
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/* 7&8 front, 6&9 rear, 10&11 center/lfe */
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0xff, /* slot 3 */
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0xff, /* slot 4 */
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0xff, /* slot 5 */
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AC97_PCM_SURR_DAC_RATE, /* slot 6 */
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AC97_PCM_FRONT_DAC_RATE, /* slot 7 */
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AC97_PCM_FRONT_DAC_RATE, /* slot 8 */
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AC97_PCM_SURR_DAC_RATE, /* slot 9 */
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AC97_PCM_LFE_DAC_RATE, /* slot 10 */
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AC97_PCM_LFE_DAC_RATE, /* slot 11 */
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},
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{
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/* 6&9 front, 10&11 rear, 3&4 center/lfe */
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AC97_PCM_LFE_DAC_RATE, /* slot 3 */
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AC97_PCM_LFE_DAC_RATE, /* slot 4 */
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0xff, /* slot 5 */
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AC97_PCM_FRONT_DAC_RATE, /* slot 6 */
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0xff, /* slot 7 */
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0xff, /* slot 8 */
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AC97_PCM_FRONT_DAC_RATE, /* slot 9 */
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AC97_PCM_SURR_DAC_RATE, /* slot 10 */
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AC97_PCM_SURR_DAC_RATE, /* slot 11 */
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},
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{
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/* 10&11 front, 3&4 rear, 7&8 center/lfe */
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AC97_PCM_SURR_DAC_RATE, /* slot 3 */
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AC97_PCM_SURR_DAC_RATE, /* slot 4 */
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0xff, /* slot 5 */
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0xff, /* slot 6 */
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AC97_PCM_LFE_DAC_RATE, /* slot 7 */
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AC97_PCM_LFE_DAC_RATE, /* slot 8 */
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0xff, /* slot 9 */
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AC97_PCM_FRONT_DAC_RATE, /* slot 10 */
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AC97_PCM_FRONT_DAC_RATE, /* slot 11 */
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},
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},
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{
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/* double rates */
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{
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/* 3&4 front, 7&8 front (t+1) */
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AC97_PCM_FRONT_DAC_RATE, /* slot 3 */
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AC97_PCM_FRONT_DAC_RATE, /* slot 4 */
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0xff, /* slot 5 */
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0xff, /* slot 6 */
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AC97_PCM_FRONT_DAC_RATE, /* slot 7 */
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AC97_PCM_FRONT_DAC_RATE, /* slot 8 */
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0xff, /* slot 9 */
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0xff, /* slot 10 */
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0xff, /* slot 11 */
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},
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{
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/* not specified in the specification */
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0xff, /* slot 3 */
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0xff, /* slot 4 */
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0xff, /* slot 5 */
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0xff, /* slot 6 */
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0xff, /* slot 7 */
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0xff, /* slot 8 */
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0xff, /* slot 9 */
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0xff, /* slot 10 */
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0xff, /* slot 11 */
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},
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{
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0xff, /* slot 3 */
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0xff, /* slot 4 */
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0xff, /* slot 5 */
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0xff, /* slot 6 */
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0xff, /* slot 7 */
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0xff, /* slot 8 */
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0xff, /* slot 9 */
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0xff, /* slot 10 */
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0xff, /* slot 11 */
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},
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{
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0xff, /* slot 3 */
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0xff, /* slot 4 */
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0xff, /* slot 5 */
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0xff, /* slot 6 */
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0xff, /* slot 7 */
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0xff, /* slot 8 */
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0xff, /* slot 9 */
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0xff, /* slot 10 */
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0xff, /* slot 11 */
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}
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}};
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/* FIXME: more various mappings for ADC? */
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static unsigned char rate_cregs[9] = {
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AC97_PCM_LR_ADC_RATE, /* 3 */
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AC97_PCM_LR_ADC_RATE, /* 4 */
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0xff, /* 5 */
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AC97_PCM_MIC_ADC_RATE, /* 6 */
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0xff, /* 7 */
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0xff, /* 8 */
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0xff, /* 9 */
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0xff, /* 10 */
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0xff, /* 11 */
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};
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static unsigned char get_slot_reg(struct ac97_pcm *pcm, unsigned short cidx,
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unsigned short slot, int dbl)
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{
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if (slot < 3)
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return 0xff;
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if (slot > 11)
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return 0xff;
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if (pcm->spdif)
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return AC97_SPDIF; /* pseudo register */
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if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK)
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return rate_reg_tables[dbl][pcm->r[dbl].rate_table[cidx]][slot - 3];
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else
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return rate_cregs[slot - 3];
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}
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static int set_spdif_rate(struct snd_ac97 *ac97, unsigned short rate)
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{
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unsigned short old, bits, reg, mask;
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unsigned int sbits;
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if (! (ac97->ext_id & AC97_EI_SPDIF))
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return -ENODEV;
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/* TODO: double rate support */
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if (ac97->flags & AC97_CS_SPDIF) {
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switch (rate) {
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case 48000: bits = 0; break;
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case 44100: bits = 1 << AC97_SC_SPSR_SHIFT; break;
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default: /* invalid - disable output */
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snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
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return -EINVAL;
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}
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reg = AC97_CSR_SPDIF;
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mask = 1 << AC97_SC_SPSR_SHIFT;
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} else {
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if (ac97->id == AC97_ID_CM9739 && rate != 48000) {
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snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
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return -EINVAL;
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}
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switch (rate) {
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case 44100: bits = AC97_SC_SPSR_44K; break;
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case 48000: bits = AC97_SC_SPSR_48K; break;
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case 32000: bits = AC97_SC_SPSR_32K; break;
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default: /* invalid - disable output */
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snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
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return -EINVAL;
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}
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reg = AC97_SPDIF;
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mask = AC97_SC_SPSR_MASK;
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}
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mutex_lock(&ac97->reg_mutex);
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old = snd_ac97_read(ac97, reg) & mask;
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if (old != bits) {
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snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
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snd_ac97_update_bits_nolock(ac97, reg, mask, bits);
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/* update the internal spdif bits */
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sbits = ac97->spdif_status;
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if (sbits & IEC958_AES0_PROFESSIONAL) {
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sbits &= ~IEC958_AES0_PRO_FS;
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switch (rate) {
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case 44100: sbits |= IEC958_AES0_PRO_FS_44100; break;
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case 48000: sbits |= IEC958_AES0_PRO_FS_48000; break;
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case 32000: sbits |= IEC958_AES0_PRO_FS_32000; break;
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}
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} else {
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sbits &= ~(IEC958_AES3_CON_FS << 24);
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switch (rate) {
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case 44100: sbits |= IEC958_AES3_CON_FS_44100<<24; break;
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case 48000: sbits |= IEC958_AES3_CON_FS_48000<<24; break;
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case 32000: sbits |= IEC958_AES3_CON_FS_32000<<24; break;
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}
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}
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ac97->spdif_status = sbits;
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}
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snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF);
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mutex_unlock(&ac97->reg_mutex);
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return 0;
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}
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/**
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* snd_ac97_set_rate - change the rate of the given input/output.
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* @ac97: the ac97 instance
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* @reg: the register to change
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* @rate: the sample rate to set
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*
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* Changes the rate of the given input/output on the codec.
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* If the codec doesn't support VAR, the rate must be 48000 (except
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* for SPDIF).
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*
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* The valid registers are AC97_PMC_MIC_ADC_RATE,
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* AC97_PCM_FRONT_DAC_RATE, AC97_PCM_LR_ADC_RATE.
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* AC97_PCM_SURR_DAC_RATE and AC97_PCM_LFE_DAC_RATE are accepted
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* if the codec supports them.
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* AC97_SPDIF is accepted as a pseudo register to modify the SPDIF
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* status bits.
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*
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* Returns zero if successful, or a negative error code on failure.
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*/
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int snd_ac97_set_rate(struct snd_ac97 *ac97, int reg, unsigned int rate)
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{
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int dbl;
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unsigned int tmp;
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dbl = rate > 48000;
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if (dbl) {
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if (!(ac97->flags & AC97_DOUBLE_RATE))
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return -EINVAL;
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if (reg != AC97_PCM_FRONT_DAC_RATE)
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return -EINVAL;
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}
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snd_ac97_update_power(ac97, reg, 1);
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switch (reg) {
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case AC97_PCM_MIC_ADC_RATE:
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if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */
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if (rate != 48000)
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return -EINVAL;
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break;
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case AC97_PCM_FRONT_DAC_RATE:
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case AC97_PCM_LR_ADC_RATE:
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if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0) /* VRA */
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if (rate != 48000 && rate != 96000)
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return -EINVAL;
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break;
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case AC97_PCM_SURR_DAC_RATE:
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if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC))
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return -EINVAL;
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break;
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case AC97_PCM_LFE_DAC_RATE:
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if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
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return -EINVAL;
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break;
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case AC97_SPDIF:
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/* special case */
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return set_spdif_rate(ac97, rate);
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default:
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return -EINVAL;
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}
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if (dbl)
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rate /= 2;
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tmp = (rate * ac97->bus->clock) / 48000;
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if (tmp > 65535)
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return -EINVAL;
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if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE)
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snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS,
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AC97_EA_DRA, dbl ? AC97_EA_DRA : 0);
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snd_ac97_update(ac97, reg, tmp & 0xffff);
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snd_ac97_read(ac97, reg);
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if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) {
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/* Intel controllers require double rate data to be put in
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* slots 7+8
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*/
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snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE,
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AC97_GP_DRSS_MASK,
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dbl ? AC97_GP_DRSS_78 : 0);
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snd_ac97_read(ac97, AC97_GENERAL_PURPOSE);
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}
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return 0;
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}
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EXPORT_SYMBOL(snd_ac97_set_rate);
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static unsigned short get_pslots(struct snd_ac97 *ac97, unsigned char *rate_table, unsigned short *spdif_slots)
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{
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if (!ac97_is_audio(ac97))
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return 0;
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if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) {
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unsigned short slots = 0;
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if (ac97_is_rev22(ac97)) {
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/* Note: it's simply emulation of AMAP behaviour */
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u16 es;
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es = ac97->regs[AC97_EXTENDED_ID] &= ~AC97_EI_DACS_SLOT_MASK;
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switch (ac97->addr) {
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case 1:
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case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break;
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case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break;
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}
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snd_ac97_write_cache(ac97, AC97_EXTENDED_ID, es);
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}
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switch (ac97->addr) {
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case 0:
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slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
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if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
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slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
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if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
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slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
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if (ac97->ext_id & AC97_EI_SPDIF) {
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if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
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*spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);
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else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
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*spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
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else
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*spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
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}
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*rate_table = 0;
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break;
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case 1:
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case 2:
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slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
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if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
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slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
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if (ac97->ext_id & AC97_EI_SPDIF) {
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if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
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*spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
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else
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*spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
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}
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*rate_table = 1;
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break;
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case 3:
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slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
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if (ac97->ext_id & AC97_EI_SPDIF)
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*spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
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*rate_table = 2;
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break;
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}
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return slots;
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} else {
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unsigned short slots;
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slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
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if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
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slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
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if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
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slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
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if (ac97->ext_id & AC97_EI_SPDIF) {
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if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
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*spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);
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else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
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*spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
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else
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*spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
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}
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*rate_table = 0;
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return slots;
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}
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}
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static unsigned short get_cslots(struct snd_ac97 *ac97)
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{
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unsigned short slots;
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if (!ac97_is_audio(ac97))
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return 0;
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slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
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slots |= (1<<AC97_SLOT_MIC);
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return slots;
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}
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static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl)
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{
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int i, idx;
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unsigned int rates = ~0;
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unsigned char reg;
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for (i = 3; i < 12; i++) {
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if (!(slots & (1 << i)))
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continue;
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reg = get_slot_reg(pcm, cidx, i, dbl);
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switch (reg) {
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case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break;
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case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break;
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case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break;
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case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break;
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case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break;
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default: idx = AC97_RATES_SPDIF; break;
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}
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rates &= pcm->r[dbl].codec[cidx]->rates[idx];
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}
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if (!dbl)
|
|
rates &= ~(SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 |
|
|
SNDRV_PCM_RATE_96000);
|
|
return rates;
|
|
}
|
|
|
|
/**
|
|
* snd_ac97_pcm_assign - assign AC97 slots to given PCM streams
|
|
* @bus: the ac97 bus instance
|
|
* @pcms_count: count of PCMs to be assigned
|
|
* @pcms: PCMs to be assigned
|
|
*
|
|
* It assigns available AC97 slots for given PCMs. If none or only
|
|
* some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members
|
|
* are reduced and might be zero.
|
|
*/
|
|
int snd_ac97_pcm_assign(struct snd_ac97_bus *bus,
|
|
unsigned short pcms_count,
|
|
const struct ac97_pcm *pcms)
|
|
{
|
|
int i, j, k;
|
|
const struct ac97_pcm *pcm;
|
|
struct ac97_pcm *rpcms, *rpcm;
|
|
unsigned short avail_slots[2][4];
|
|
unsigned char rate_table[2][4];
|
|
unsigned short tmp, slots;
|
|
unsigned short spdif_slots[4];
|
|
unsigned int rates;
|
|
struct snd_ac97 *codec;
|
|
|
|
rpcms = kcalloc(pcms_count, sizeof(struct ac97_pcm), GFP_KERNEL);
|
|
if (rpcms == NULL)
|
|
return -ENOMEM;
|
|
memset(avail_slots, 0, sizeof(avail_slots));
|
|
memset(rate_table, 0, sizeof(rate_table));
|
|
memset(spdif_slots, 0, sizeof(spdif_slots));
|
|
for (i = 0; i < 4; i++) {
|
|
codec = bus->codec[i];
|
|
if (!codec)
|
|
continue;
|
|
avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]);
|
|
avail_slots[1][i] = get_cslots(codec);
|
|
if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) {
|
|
for (j = 0; j < i; j++) {
|
|
if (bus->codec[j])
|
|
avail_slots[1][i] &= ~avail_slots[1][j];
|
|
}
|
|
}
|
|
}
|
|
/* first step - exclusive devices */
|
|
for (i = 0; i < pcms_count; i++) {
|
|
pcm = &pcms[i];
|
|
rpcm = &rpcms[i];
|
|
/* low-level driver thinks that it's more clever */
|
|
if (pcm->copy_flag) {
|
|
*rpcm = *pcm;
|
|
continue;
|
|
}
|
|
rpcm->stream = pcm->stream;
|
|
rpcm->exclusive = pcm->exclusive;
|
|
rpcm->spdif = pcm->spdif;
|
|
rpcm->private_value = pcm->private_value;
|
|
rpcm->bus = bus;
|
|
rpcm->rates = ~0;
|
|
slots = pcm->r[0].slots;
|
|
for (j = 0; j < 4 && slots; j++) {
|
|
if (!bus->codec[j])
|
|
continue;
|
|
rates = ~0;
|
|
if (pcm->spdif && pcm->stream == 0)
|
|
tmp = spdif_slots[j];
|
|
else
|
|
tmp = avail_slots[pcm->stream][j];
|
|
if (pcm->exclusive) {
|
|
/* exclusive access */
|
|
tmp &= slots;
|
|
for (k = 0; k < i; k++) {
|
|
if (rpcm->stream == rpcms[k].stream)
|
|
tmp &= ~rpcms[k].r[0].rslots[j];
|
|
}
|
|
} else {
|
|
/* non-exclusive access */
|
|
tmp &= pcm->r[0].slots;
|
|
}
|
|
if (tmp) {
|
|
rpcm->r[0].rslots[j] = tmp;
|
|
rpcm->r[0].codec[j] = bus->codec[j];
|
|
rpcm->r[0].rate_table[j] = rate_table[pcm->stream][j];
|
|
if (bus->no_vra)
|
|
rates = SNDRV_PCM_RATE_48000;
|
|
else
|
|
rates = get_rates(rpcm, j, tmp, 0);
|
|
if (pcm->exclusive)
|
|
avail_slots[pcm->stream][j] &= ~tmp;
|
|
}
|
|
slots &= ~tmp;
|
|
rpcm->r[0].slots |= tmp;
|
|
rpcm->rates &= rates;
|
|
}
|
|
/* for double rate, we check the first codec only */
|
|
if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK &&
|
|
bus->codec[0] && (bus->codec[0]->flags & AC97_DOUBLE_RATE) &&
|
|
rate_table[pcm->stream][0] == 0) {
|
|
tmp = (1<<AC97_SLOT_PCM_LEFT) | (1<<AC97_SLOT_PCM_RIGHT) |
|
|
(1<<AC97_SLOT_PCM_LEFT_0) | (1<<AC97_SLOT_PCM_RIGHT_0);
|
|
if ((tmp & pcm->r[1].slots) == tmp) {
|
|
rpcm->r[1].slots = tmp;
|
|
rpcm->r[1].rslots[0] = tmp;
|
|
rpcm->r[1].rate_table[0] = 0;
|
|
rpcm->r[1].codec[0] = bus->codec[0];
|
|
if (pcm->exclusive)
|
|
avail_slots[pcm->stream][0] &= ~tmp;
|
|
if (bus->no_vra)
|
|
rates = SNDRV_PCM_RATE_96000;
|
|
else
|
|
rates = get_rates(rpcm, 0, tmp, 1);
|
|
rpcm->rates |= rates;
|
|
}
|
|
}
|
|
if (rpcm->rates == ~0)
|
|
rpcm->rates = 0; /* not used */
|
|
}
|
|
bus->pcms_count = pcms_count;
|
|
bus->pcms = rpcms;
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(snd_ac97_pcm_assign);
|
|
|
|
/**
|
|
* snd_ac97_pcm_open - opens the given AC97 pcm
|
|
* @pcm: the ac97 pcm instance
|
|
* @rate: rate in Hz, if codec does not support VRA, this value must be 48000Hz
|
|
* @cfg: output stream characteristics
|
|
* @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm
|
|
*
|
|
* It locks the specified slots and sets the given rate to AC97 registers.
|
|
*/
|
|
int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate,
|
|
enum ac97_pcm_cfg cfg, unsigned short slots)
|
|
{
|
|
struct snd_ac97_bus *bus;
|
|
int i, cidx, r, ok_flag;
|
|
unsigned int reg_ok[4] = {0,0,0,0};
|
|
unsigned char reg;
|
|
int err = 0;
|
|
|
|
r = rate > 48000;
|
|
bus = pcm->bus;
|
|
if (cfg == AC97_PCM_CFG_SPDIF) {
|
|
for (cidx = 0; cidx < 4; cidx++)
|
|
if (bus->codec[cidx] && (bus->codec[cidx]->ext_id & AC97_EI_SPDIF)) {
|
|
err = set_spdif_rate(bus->codec[cidx], rate);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
spin_lock_irq(&pcm->bus->bus_lock);
|
|
for (i = 3; i < 12; i++) {
|
|
if (!(slots & (1 << i)))
|
|
continue;
|
|
ok_flag = 0;
|
|
for (cidx = 0; cidx < 4; cidx++) {
|
|
if (bus->used_slots[pcm->stream][cidx] & (1 << i)) {
|
|
spin_unlock_irq(&pcm->bus->bus_lock);
|
|
err = -EBUSY;
|
|
goto error;
|
|
}
|
|
if (pcm->r[r].rslots[cidx] & (1 << i)) {
|
|
bus->used_slots[pcm->stream][cidx] |= (1 << i);
|
|
ok_flag++;
|
|
}
|
|
}
|
|
if (!ok_flag) {
|
|
spin_unlock_irq(&pcm->bus->bus_lock);
|
|
snd_printk(KERN_ERR "cannot find configuration for AC97 slot %i\n", i);
|
|
err = -EAGAIN;
|
|
goto error;
|
|
}
|
|
}
|
|
pcm->cur_dbl = r;
|
|
spin_unlock_irq(&pcm->bus->bus_lock);
|
|
for (i = 3; i < 12; i++) {
|
|
if (!(slots & (1 << i)))
|
|
continue;
|
|
for (cidx = 0; cidx < 4; cidx++) {
|
|
if (pcm->r[r].rslots[cidx] & (1 << i)) {
|
|
reg = get_slot_reg(pcm, cidx, i, r);
|
|
if (reg == 0xff) {
|
|
snd_printk(KERN_ERR "invalid AC97 slot %i?\n", i);
|
|
continue;
|
|
}
|
|
if (reg_ok[cidx] & (1 << (reg - AC97_PCM_FRONT_DAC_RATE)))
|
|
continue;
|
|
//printk(KERN_DEBUG "setting ac97 reg 0x%x to rate %d\n", reg, rate);
|
|
err = snd_ac97_set_rate(pcm->r[r].codec[cidx], reg, rate);
|
|
if (err < 0)
|
|
snd_printk(KERN_ERR "error in snd_ac97_set_rate: cidx=%d, reg=0x%x, rate=%d, err=%d\n", cidx, reg, rate, err);
|
|
else
|
|
reg_ok[cidx] |= (1 << (reg - AC97_PCM_FRONT_DAC_RATE));
|
|
}
|
|
}
|
|
}
|
|
pcm->aslots = slots;
|
|
return 0;
|
|
|
|
error:
|
|
pcm->aslots = slots;
|
|
snd_ac97_pcm_close(pcm);
|
|
return err;
|
|
}
|
|
|
|
EXPORT_SYMBOL(snd_ac97_pcm_open);
|
|
|
|
/**
|
|
* snd_ac97_pcm_close - closes the given AC97 pcm
|
|
* @pcm: the ac97 pcm instance
|
|
*
|
|
* It frees the locked AC97 slots.
|
|
*/
|
|
int snd_ac97_pcm_close(struct ac97_pcm *pcm)
|
|
{
|
|
struct snd_ac97_bus *bus;
|
|
unsigned short slots = pcm->aslots;
|
|
int i, cidx;
|
|
|
|
#ifdef CONFIG_SND_AC97_POWER_SAVE
|
|
int r = pcm->cur_dbl;
|
|
for (i = 3; i < 12; i++) {
|
|
if (!(slots & (1 << i)))
|
|
continue;
|
|
for (cidx = 0; cidx < 4; cidx++) {
|
|
if (pcm->r[r].rslots[cidx] & (1 << i)) {
|
|
int reg = get_slot_reg(pcm, cidx, i, r);
|
|
snd_ac97_update_power(pcm->r[r].codec[cidx],
|
|
reg, 0);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
bus = pcm->bus;
|
|
spin_lock_irq(&pcm->bus->bus_lock);
|
|
for (i = 3; i < 12; i++) {
|
|
if (!(slots & (1 << i)))
|
|
continue;
|
|
for (cidx = 0; cidx < 4; cidx++)
|
|
bus->used_slots[pcm->stream][cidx] &= ~(1 << i);
|
|
}
|
|
pcm->aslots = 0;
|
|
pcm->cur_dbl = 0;
|
|
spin_unlock_irq(&pcm->bus->bus_lock);
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(snd_ac97_pcm_close);
|
|
|
|
static int double_rate_hw_constraint_rate(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
|
|
if (channels->min > 2) {
|
|
static const struct snd_interval single_rates = {
|
|
.min = 1,
|
|
.max = 48000,
|
|
};
|
|
struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
|
|
return snd_interval_refine(rate, &single_rates);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int double_rate_hw_constraint_channels(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
|
|
if (rate->min > 48000) {
|
|
static const struct snd_interval double_rate_channels = {
|
|
.min = 2,
|
|
.max = 2,
|
|
};
|
|
struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
|
|
return snd_interval_refine(channels, &double_rate_channels);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* snd_ac97_pcm_double_rate_rules - set double rate constraints
|
|
* @runtime: the runtime of the ac97 front playback pcm
|
|
*
|
|
* Installs the hardware constraint rules to prevent using double rates and
|
|
* more than two channels at the same time.
|
|
*/
|
|
int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime)
|
|
{
|
|
int err;
|
|
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
|
|
double_rate_hw_constraint_rate, NULL,
|
|
SNDRV_PCM_HW_PARAM_CHANNELS, -1);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
|
|
double_rate_hw_constraint_channels, NULL,
|
|
SNDRV_PCM_HW_PARAM_RATE, -1);
|
|
return err;
|
|
}
|
|
|
|
EXPORT_SYMBOL(snd_ac97_pcm_double_rate_rules);
|