litmus-rt.git - The LITMUS^RT kernel.

	Commit message (Expand)	Author	Age
*	mm: now that all old mmu_gather code is gone, remove the storage	Peter Zijlstra	2011-05-25
*	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jik...	Linus Torvalds	2011-05-23
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\| *	Merge branch 'master' into for-next	Jiri Kosina	2011-04-26
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\| * \|	update David Miller's old email address	Justin P. Mattock	2011-04-06
* \| \|	MIPS: Move arch_get_unmapped_area and gang to new file.	Ralf Baechle	2011-05-19
* \| \|	MIPS: Kconfig and Makefile update for Netlogic XLR/XLS	Jayachandran C	2011-05-19
* \| \|	MIPS: Netlogic: Cache, TLB support and feature overrides for XLR	Jayachandran C	2011-05-19
* \| \|	MIPS: tlbex: Fix GCC 4.6.0 build error	Ralf Baechle	2011-05-10
* \| \|	MIPS: c-r4k: Fix GCC 4.6.0 build error	Ralf Baechle	2011-05-10
\| \|/ \|/\|
* \|	Fix common misspellings	Lucas De Marchi	2011-03-31
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*	MIPS: Fix GCC-4.6 'set but not used' warning in arch/mips/mm/init.c	David Daney	2011-03-14
*	MIPS: Add an unreachable return statement to satisfy buggy GCCs.	David Daney	2011-03-14
*	MIPS: Use WARN() in uasm for better diagnostics.	David Daney	2011-01-18
*	MIPS: Optimize TLB handlers for Octeon CPUs	David Daney	2011-01-18
*	MIPS: Add LDX and LWX instructions to uasm.	David Daney	2011-01-18
*	MIPS: Use BBIT instructions in TLB handlers	David Daney	2011-01-18
*	MIPS: Use C0_KScratch (if present) to hold PGD pointer.	David Daney	2011-01-18
*	MIPS: Add DINSM to uasm.	David Daney	2011-01-18
*	MIPS: Fix build errors in sc-mips.c	Kevin Cernekee	2010-12-17
*	MIPS: Rename mips_dma_cache_sync back to dma_cache_sync	Ralf Baechle	2010-12-16
*	MIPS: Honor L2 bypass bit	Kevin Cernekee	2010-10-29
*	MIPS: Decouple BMIPS CPU support from bcm47xx/bcm63xx SoC code	Kevin Cernekee	2010-10-29
*	MIPS: add support for software performance events	Deng-Cheng Zhu	2010-10-29
*	MIPS: Octeon: Apply CN63XXP1 errata workarounds.	David Daney	2010-10-29
*	MIPS: Octeon: Handle Octeon II caches.	David Daney	2010-10-29
*	MIPS: Convert DMA to use dma-mapping-common.h	David Daney	2010-10-29
*	MIPS: Remove wait argument of r4k_on_each_cpu	Ralf Baechle	2010-10-29
*	MIPS: More detailed description of r4k_on_each_cpu	Ralf Baechle	2010-10-29
*	mm: fix race in kunmap_atomic()	Peter Zijlstra	2010-10-27
*	mm: stack based kmap_atomic()	Peter Zijlstra	2010-10-26
*	MIPS: DMA: Fix computation of DMA flags from device's coherent_dma_mask.	Ralf Baechle	2010-10-04
*	MIPS: RM7000: Symbol should be static	Ricardo Mendoza	2010-10-04
*	dma-mapping: remove dma_is_consistent API	FUJITA Tomonori	2010-08-11
*	kmap_atomic: make kunmap_atomic() harder to misuse	Cesar Eduardo Barros	2010-08-09
*	MIPS: kprobe: Add support.	David Daney	2010-08-05
*	MIPS: uasm: Add option to export uasm API.	David Daney	2010-08-05
*	MIPS: uasm: Add BBIT0 and BBIT1 instructions	David Daney	2010-08-05
*	MIPS: uasm: Add drotr32 and uasm_i_drotr_safe.	David Daney	2010-08-05
*	MIPS: JZ4740: Add base support for Ingenic JZ4740 System-on-a-Chip	Lars-Peter Clausen	2010-08-05
*	MIPS: RM7000: Add support for tertiary cache	Ricardo Mendoza	2010-08-05
*	MIPS: RM7000: Make use of cache_op() instead of inline asm	Ricardo Mendoza	2010-08-05
*	MIPS: Remove unnecessary header file inclusion from fault.c.	Ralf Baechle	2010-08-05
*	MIPS: Add -Werror to arch/mips/Kbuild	Sam Ravnborg	2010-08-05
*	MIPS: Check for accesses beyond the end of the PGD.	David Daney	2010-04-30
*	MIPS: Use uasm_i_ds{r,l}l_safe() instead of uasm_i_ds{r,l}l() in tlbex.c	David Daney	2010-04-30
*	MIPS: Fix __vmalloc() etc. on MIPS for non-GPL modules	Anton Altaparmakov	2010-04-12
*	MIPS: Sibyte: Fix M3 TLB exception handler workaround.	Ralf Baechle	2010-04-12
*	MIPS: uasm: Add OR instruction.	Ralf Baechle	2010-04-12
*	MIPS: Add SYSCALL to uasm.	David Daney	2010-04-12
*	include cleanup: Update gfp.h and slab.h includes to prepare for breaking imp...	Tejun Heo	2010-03-30

/* * 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 <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);