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737 lines
20 KiB
737 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (c) by Jaroslav Kysela <[email protected]> |
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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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#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 <linux/export.h> |
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|
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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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/* |
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* PCM support |
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*/ |
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|
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static const 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 const 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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* Return: 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) |
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rates &= ~(SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 | |
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SNDRV_PCM_RATE_96000); |
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return rates; |
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} |
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|
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/** |
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* snd_ac97_pcm_assign - assign AC97 slots to given PCM streams |
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* @bus: the ac97 bus instance |
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* @pcms_count: count of PCMs to be assigned |
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* @pcms: PCMs to be assigned |
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* |
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* It assigns available AC97 slots for given PCMs. If none or only |
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* some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members |
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* are reduced and might be zero. |
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* |
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* Return: Zero if successful, or a negative error code on failure. |
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*/ |
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int snd_ac97_pcm_assign(struct snd_ac97_bus *bus, |
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unsigned short pcms_count, |
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const struct ac97_pcm *pcms) |
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{ |
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int i, j, k; |
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const struct ac97_pcm *pcm; |
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struct ac97_pcm *rpcms, *rpcm; |
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unsigned short avail_slots[2][4]; |
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unsigned char rate_table[2][4]; |
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unsigned short tmp, slots; |
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unsigned short spdif_slots[4]; |
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unsigned int rates; |
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struct snd_ac97 *codec; |
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|
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rpcms = kcalloc(pcms_count, sizeof(struct ac97_pcm), GFP_KERNEL); |
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if (rpcms == NULL) |
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return -ENOMEM; |
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memset(avail_slots, 0, sizeof(avail_slots)); |
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memset(rate_table, 0, sizeof(rate_table)); |
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memset(spdif_slots, 0, sizeof(spdif_slots)); |
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for (i = 0; i < 4; i++) { |
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codec = bus->codec[i]; |
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if (!codec) |
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continue; |
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avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]); |
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avail_slots[1][i] = get_cslots(codec); |
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if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) { |
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for (j = 0; j < i; j++) { |
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if (bus->codec[j]) |
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avail_slots[1][i] &= ~avail_slots[1][j]; |
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} |
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} |
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} |
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/* first step - exclusive devices */ |
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for (i = 0; i < pcms_count; i++) { |
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pcm = &pcms[i]; |
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rpcm = &rpcms[i]; |
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/* low-level driver thinks that it's more clever */ |
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if (pcm->copy_flag) { |
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*rpcm = *pcm; |
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continue; |
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} |
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rpcm->stream = pcm->stream; |
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rpcm->exclusive = pcm->exclusive; |
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rpcm->spdif = pcm->spdif; |
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rpcm->private_value = pcm->private_value; |
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rpcm->bus = bus; |
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rpcm->rates = ~0; |
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slots = pcm->r[0].slots; |
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for (j = 0; j < 4 && slots; j++) { |
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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. |
|
* |
|
* Return: Zero if successful, or a negative error code on failure. |
|
*/ |
|
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); |
|
dev_err(bus->card->dev, |
|
"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) { |
|
dev_err(bus->card->dev, |
|
"invalid AC97 slot %i?\n", i); |
|
continue; |
|
} |
|
if (reg_ok[cidx] & (1 << (reg - AC97_PCM_FRONT_DAC_RATE))) |
|
continue; |
|
dev_dbg(bus->card->dev, |
|
"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) |
|
dev_err(bus->card->dev, |
|
"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. |
|
* |
|
* Return: Zero. |
|
*/ |
|
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. |
|
* |
|
* Return: Zero if successful, or a negative error code on failure. |
|
*/ |
|
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);
|
|
|