diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/pci/ac97/ac97_pcm.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/pci/ac97/ac97_pcm.c | 737 |
1 files changed, 0 insertions, 737 deletions
diff --git a/ANDROID_3.4.5/sound/pci/ac97/ac97_pcm.c b/ANDROID_3.4.5/sound/pci/ac97/ac97_pcm.c deleted file mode 100644 index f1488fc1..00000000 --- a/ANDROID_3.4.5/sound/pci/ac97/ac97_pcm.c +++ /dev/null @@ -1,737 +0,0 @@ -/* - * Copyright (c) by Jaroslav Kysela <perex@perex.cz> - * Universal interface for Audio Codec '97 - * - * For more details look to AC '97 component specification revision 2.2 - * by Intel Corporation (http://developer.intel.com) and to datasheets - * for specific codecs. - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/mutex.h> -#include <linux/export.h> - -#include <sound/core.h> -#include <sound/pcm.h> -#include <sound/control.h> -#include <sound/ac97_codec.h> -#include <sound/asoundef.h> -#include "ac97_id.h" -#include "ac97_local.h" - -/* - * PCM support - */ - -static unsigned char rate_reg_tables[2][4][9] = { -{ - /* standard rates */ - { - /* 3&4 front, 7&8 rear, 6&9 center/lfe */ - AC97_PCM_FRONT_DAC_RATE, /* slot 3 */ - AC97_PCM_FRONT_DAC_RATE, /* slot 4 */ - 0xff, /* slot 5 */ - AC97_PCM_LFE_DAC_RATE, /* slot 6 */ - AC97_PCM_SURR_DAC_RATE, /* slot 7 */ - AC97_PCM_SURR_DAC_RATE, /* slot 8 */ - AC97_PCM_LFE_DAC_RATE, /* slot 9 */ - 0xff, /* slot 10 */ - 0xff, /* slot 11 */ - }, - { - /* 7&8 front, 6&9 rear, 10&11 center/lfe */ - 0xff, /* slot 3 */ - 0xff, /* slot 4 */ - 0xff, /* slot 5 */ - AC97_PCM_SURR_DAC_RATE, /* slot 6 */ - AC97_PCM_FRONT_DAC_RATE, /* slot 7 */ - AC97_PCM_FRONT_DAC_RATE, /* slot 8 */ - AC97_PCM_SURR_DAC_RATE, /* slot 9 */ - AC97_PCM_LFE_DAC_RATE, /* slot 10 */ - AC97_PCM_LFE_DAC_RATE, /* slot 11 */ - }, - { - /* 6&9 front, 10&11 rear, 3&4 center/lfe */ - AC97_PCM_LFE_DAC_RATE, /* slot 3 */ - AC97_PCM_LFE_DAC_RATE, /* slot 4 */ - 0xff, /* slot 5 */ - AC97_PCM_FRONT_DAC_RATE, /* slot 6 */ - 0xff, /* slot 7 */ - 0xff, /* slot 8 */ - AC97_PCM_FRONT_DAC_RATE, /* slot 9 */ - AC97_PCM_SURR_DAC_RATE, /* slot 10 */ - AC97_PCM_SURR_DAC_RATE, /* slot 11 */ - }, - { - /* 10&11 front, 3&4 rear, 7&8 center/lfe */ - AC97_PCM_SURR_DAC_RATE, /* slot 3 */ - AC97_PCM_SURR_DAC_RATE, /* slot 4 */ - 0xff, /* slot 5 */ - 0xff, /* slot 6 */ - AC97_PCM_LFE_DAC_RATE, /* slot 7 */ - AC97_PCM_LFE_DAC_RATE, /* slot 8 */ - 0xff, /* slot 9 */ - AC97_PCM_FRONT_DAC_RATE, /* slot 10 */ - AC97_PCM_FRONT_DAC_RATE, /* slot 11 */ - }, -}, -{ - /* double rates */ - { - /* 3&4 front, 7&8 front (t+1) */ - AC97_PCM_FRONT_DAC_RATE, /* slot 3 */ - AC97_PCM_FRONT_DAC_RATE, /* slot 4 */ - 0xff, /* slot 5 */ - 0xff, /* slot 6 */ - AC97_PCM_FRONT_DAC_RATE, /* slot 7 */ - AC97_PCM_FRONT_DAC_RATE, /* slot 8 */ - 0xff, /* slot 9 */ - 0xff, /* slot 10 */ - 0xff, /* slot 11 */ - }, - { - /* not specified in the specification */ - 0xff, /* slot 3 */ - 0xff, /* slot 4 */ - 0xff, /* slot 5 */ - 0xff, /* slot 6 */ - 0xff, /* slot 7 */ - 0xff, /* slot 8 */ - 0xff, /* slot 9 */ - 0xff, /* slot 10 */ - 0xff, /* slot 11 */ - }, - { - 0xff, /* slot 3 */ - 0xff, /* slot 4 */ - 0xff, /* slot 5 */ - 0xff, /* slot 6 */ - 0xff, /* slot 7 */ - 0xff, /* slot 8 */ - 0xff, /* slot 9 */ - 0xff, /* slot 10 */ - 0xff, /* slot 11 */ - }, - { - 0xff, /* slot 3 */ - 0xff, /* slot 4 */ - 0xff, /* slot 5 */ - 0xff, /* slot 6 */ - 0xff, /* slot 7 */ - 0xff, /* slot 8 */ - 0xff, /* slot 9 */ - 0xff, /* slot 10 */ - 0xff, /* slot 11 */ - } -}}; - -/* FIXME: more various mappings for ADC? */ -static unsigned char rate_cregs[9] = { - AC97_PCM_LR_ADC_RATE, /* 3 */ - AC97_PCM_LR_ADC_RATE, /* 4 */ - 0xff, /* 5 */ - AC97_PCM_MIC_ADC_RATE, /* 6 */ - 0xff, /* 7 */ - 0xff, /* 8 */ - 0xff, /* 9 */ - 0xff, /* 10 */ - 0xff, /* 11 */ -}; - -static unsigned char get_slot_reg(struct ac97_pcm *pcm, unsigned short cidx, - unsigned short slot, int dbl) -{ - if (slot < 3) - return 0xff; - if (slot > 11) - return 0xff; - if (pcm->spdif) - return AC97_SPDIF; /* pseudo register */ - if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK) - return rate_reg_tables[dbl][pcm->r[dbl].rate_table[cidx]][slot - 3]; - else - return rate_cregs[slot - 3]; -} - -static int set_spdif_rate(struct snd_ac97 *ac97, unsigned short rate) -{ - unsigned short old, bits, reg, mask; - unsigned int sbits; - - if (! (ac97->ext_id & AC97_EI_SPDIF)) - return -ENODEV; - - /* TODO: double rate support */ - if (ac97->flags & AC97_CS_SPDIF) { - switch (rate) { - case 48000: bits = 0; break; - case 44100: bits = 1 << AC97_SC_SPSR_SHIFT; break; - default: /* invalid - disable output */ - snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); - return -EINVAL; - } - reg = AC97_CSR_SPDIF; - mask = 1 << AC97_SC_SPSR_SHIFT; - } else { - if (ac97->id == AC97_ID_CM9739 && rate != 48000) { - snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); - return -EINVAL; - } - switch (rate) { - case 44100: bits = AC97_SC_SPSR_44K; break; - case 48000: bits = AC97_SC_SPSR_48K; break; - case 32000: bits = AC97_SC_SPSR_32K; break; - default: /* invalid - disable output */ - snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); - return -EINVAL; - } - reg = AC97_SPDIF; - mask = AC97_SC_SPSR_MASK; - } - - mutex_lock(&ac97->reg_mutex); - old = snd_ac97_read(ac97, reg) & mask; - if (old != bits) { - snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); - snd_ac97_update_bits_nolock(ac97, reg, mask, bits); - /* update the internal spdif bits */ - sbits = ac97->spdif_status; - if (sbits & IEC958_AES0_PROFESSIONAL) { - sbits &= ~IEC958_AES0_PRO_FS; - switch (rate) { - case 44100: sbits |= IEC958_AES0_PRO_FS_44100; break; - case 48000: sbits |= IEC958_AES0_PRO_FS_48000; break; - case 32000: sbits |= IEC958_AES0_PRO_FS_32000; break; - } - } else { - sbits &= ~(IEC958_AES3_CON_FS << 24); - switch (rate) { - case 44100: sbits |= IEC958_AES3_CON_FS_44100<<24; break; - case 48000: sbits |= IEC958_AES3_CON_FS_48000<<24; break; - case 32000: sbits |= IEC958_AES3_CON_FS_32000<<24; break; - } - } - ac97->spdif_status = sbits; - } - snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF); - mutex_unlock(&ac97->reg_mutex); - return 0; -} - -/** - * snd_ac97_set_rate - change the rate of the given input/output. - * @ac97: the ac97 instance - * @reg: the register to change - * @rate: the sample rate to set - * - * Changes the rate of the given input/output on the codec. - * If the codec doesn't support VAR, the rate must be 48000 (except - * for SPDIF). - * - * The valid registers are AC97_PMC_MIC_ADC_RATE, - * AC97_PCM_FRONT_DAC_RATE, AC97_PCM_LR_ADC_RATE. - * AC97_PCM_SURR_DAC_RATE and AC97_PCM_LFE_DAC_RATE are accepted - * if the codec supports them. - * AC97_SPDIF is accepted as a pseudo register to modify the SPDIF - * status bits. - * - * Returns zero if successful, or a negative error code on failure. - */ -int snd_ac97_set_rate(struct snd_ac97 *ac97, int reg, unsigned int rate) -{ - int dbl; - unsigned int tmp; - - dbl = rate > 48000; - if (dbl) { - if (!(ac97->flags & AC97_DOUBLE_RATE)) - return -EINVAL; - if (reg != AC97_PCM_FRONT_DAC_RATE) - return -EINVAL; - } - - snd_ac97_update_power(ac97, reg, 1); - switch (reg) { - case AC97_PCM_MIC_ADC_RATE: - if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */ - if (rate != 48000) - return -EINVAL; - break; - case AC97_PCM_FRONT_DAC_RATE: - case AC97_PCM_LR_ADC_RATE: - if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0) /* VRA */ - if (rate != 48000 && rate != 96000) - return -EINVAL; - break; - case AC97_PCM_SURR_DAC_RATE: - if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC)) - return -EINVAL; - break; - case AC97_PCM_LFE_DAC_RATE: - if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) - return -EINVAL; - break; - case AC97_SPDIF: - /* special case */ - return set_spdif_rate(ac97, rate); - default: - return -EINVAL; - } - if (dbl) - rate /= 2; - tmp = (rate * ac97->bus->clock) / 48000; - if (tmp > 65535) - return -EINVAL; - if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) - snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, - AC97_EA_DRA, dbl ? AC97_EA_DRA : 0); - snd_ac97_update(ac97, reg, tmp & 0xffff); - snd_ac97_read(ac97, reg); - if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) { - /* Intel controllers require double rate data to be put in - * slots 7+8 - */ - snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE, - AC97_GP_DRSS_MASK, - dbl ? AC97_GP_DRSS_78 : 0); - snd_ac97_read(ac97, AC97_GENERAL_PURPOSE); - } - return 0; -} - -EXPORT_SYMBOL(snd_ac97_set_rate); - -static unsigned short get_pslots(struct snd_ac97 *ac97, unsigned char *rate_table, unsigned short *spdif_slots) -{ - if (!ac97_is_audio(ac97)) - return 0; - if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) { - unsigned short slots = 0; - if (ac97_is_rev22(ac97)) { - /* Note: it's simply emulation of AMAP behaviour */ - u16 es; - es = ac97->regs[AC97_EXTENDED_ID] &= ~AC97_EI_DACS_SLOT_MASK; - switch (ac97->addr) { - case 1: - case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break; - case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break; - } - snd_ac97_write_cache(ac97, AC97_EXTENDED_ID, es); - } - switch (ac97->addr) { - case 0: - slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); - if (ac97->scaps & AC97_SCAP_SURROUND_DAC) - slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); - if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) - slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); - if (ac97->ext_id & AC97_EI_SPDIF) { - if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) - *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT); - else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) - *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); - else - *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); - } - *rate_table = 0; - break; - case 1: - case 2: - slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); - if (ac97->scaps & AC97_SCAP_SURROUND_DAC) - slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); - if (ac97->ext_id & AC97_EI_SPDIF) { - if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) - *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); - else - *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); - } - *rate_table = 1; - break; - case 3: - slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); - if (ac97->ext_id & AC97_EI_SPDIF) - *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); - *rate_table = 2; - break; - } - return slots; - } else { - unsigned short slots; - slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); - if (ac97->scaps & AC97_SCAP_SURROUND_DAC) - slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); - if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) - slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); - if (ac97->ext_id & AC97_EI_SPDIF) { - if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) - *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT); - else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) - *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); - else - *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); - } - *rate_table = 0; - return slots; - } -} - -static unsigned short get_cslots(struct snd_ac97 *ac97) -{ - unsigned short slots; - - if (!ac97_is_audio(ac97)) - return 0; - slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); - slots |= (1<<AC97_SLOT_MIC); - return slots; -} - -static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl) -{ - int i, idx; - unsigned int rates = ~0; - unsigned char reg; - - for (i = 3; i < 12; i++) { - if (!(slots & (1 << i))) - continue; - reg = get_slot_reg(pcm, cidx, i, dbl); - switch (reg) { - case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break; - case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break; - case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break; - case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break; - case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break; - default: idx = AC97_RATES_SPDIF; break; - } - rates &= pcm->r[dbl].codec[cidx]->rates[idx]; - } - 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); |