| /* |
| * Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h> |
| #include <linux/delay.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <sound/core.h> |
| #include <sound/pcm.h> |
| #include <sound/control.h> |
| #include <sound/ac97_codec.h> |
| #include <sound/asoundef.h> |
| #include "ac97_patch.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(ac97_t *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; |
| } |
| |
| down(&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); |
| up(&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(ac97_t *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; |
| } |
| |
| 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; |
| } |
| |
| static unsigned short get_pslots(ac97_t *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(ac97_t *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(ac97_bus_t *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; |
| ac97_t *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; |
| } |
| |
| /** |
| * 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) |
| { |
| ac97_bus_t *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) { |
| int err; |
| 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; |
| } |
| } |
| 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; |
| } |
| |
| /** |
| * 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) |
| { |
| ac97_bus_t *bus; |
| unsigned short slots = pcm->aslots; |
| int i, cidx; |
| |
| 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; |
| spin_unlock_irq(&pcm->bus->bus_lock); |
| return 0; |
| } |
| |
| static int double_rate_hw_constraint_rate(snd_pcm_hw_params_t *params, |
| snd_pcm_hw_rule_t *rule) |
| { |
| snd_interval_t *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
| if (channels->min > 2) { |
| static const snd_interval_t single_rates = { |
| .min = 1, |
| .max = 48000, |
| }; |
| snd_interval_t *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(snd_pcm_hw_params_t *params, |
| snd_pcm_hw_rule_t *rule) |
| { |
| snd_interval_t *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
| if (rate->min > 48000) { |
| static const snd_interval_t double_rate_channels = { |
| .min = 2, |
| .max = 2, |
| }; |
| snd_interval_t *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(snd_pcm_runtime_t *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; |
| } |
