/* * QEMU Crystal CS4231 audio chip emulation * * Copyright (c) 2006 Fabrice Bellard * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "hw.h" #include "audiodev.h" #include "audio/audio.h" #include "isa.h" #include "qemu-timer.h" /* Missing features: ADC Loopback Timer ADPCM More... */ /* #define DEBUG */ #define DEBUG_XLAW static struct { int irq; int dma; int port; int aci_counter; } conf = {9, 3, 0x534, 1}; #ifdef DEBUG #define dolog(...) AUD_log ("cs4231a", __VA_ARGS__) #else #define dolog(...) #endif #define lwarn(...) AUD_log ("cs4231a", "warning: " __VA_ARGS__) #define lerr(...) AUD_log ("cs4231a", "error: " __VA_ARGS__) #define CS_REGS 16 #define CS_DREGS 32 typedef struct CSState { QEMUSoundCard card; qemu_irq *pic; uint32_t regs[CS_REGS]; uint8_t dregs[CS_DREGS]; int irq; int dma; int port; int shift; int dma_running; int audio_free; int transferred; int aci_counter; SWVoiceOut *voice; int16_t *tab; } CSState; #define IO_READ_PROTO(name) \ static uint32_t name (void *opaque, uint32_t addr) #define IO_WRITE_PROTO(name) \ static void name (void *opaque, uint32_t addr, uint32_t val) #define GET_SADDR(addr) (addr & 3) #define MODE2 (1 << 6) #define MCE (1 << 6) #define PMCE (1 << 4) #define CMCE (1 << 5) #define TE (1 << 6) #define PEN (1 << 0) #define INT (1 << 0) #define IEN (1 << 1) #define PPIO (1 << 6) #define PI (1 << 4) #define CI (1 << 5) #define TI (1 << 6) enum { Index_Address, Index_Data, Status, PIO_Data }; enum { Left_ADC_Input_Control, Right_ADC_Input_Control, Left_AUX1_Input_Control, Right_AUX1_Input_Control, Left_AUX2_Input_Control, Right_AUX2_Input_Control, Left_DAC_Output_Control, Right_DAC_Output_Control, FS_And_Playback_Data_Format, Interface_Configuration, Pin_Control, Error_Status_And_Initialization, MODE_And_ID, Loopback_Control, Playback_Upper_Base_Count, Playback_Lower_Base_Count, Alternate_Feature_Enable_I, Alternate_Feature_Enable_II, Left_Line_Input_Control, Right_Line_Input_Control, Timer_Low_Base, Timer_High_Base, RESERVED, Alternate_Feature_Enable_III, Alternate_Feature_Status, Version_Chip_ID, Mono_Input_And_Output_Control, RESERVED_2, Capture_Data_Format, RESERVED_3, Capture_Upper_Base_Count, Capture_Lower_Base_Count }; static int freqs[2][8] = { { 8000, 16000, 27420, 32000, -1, -1, 48000, 9000 }, { 5510, 11025, 18900, 22050, 37800, 44100, 33075, 6620 } }; /* Tables courtesy http://hazelware.luggle.com/tutorials/mulawcompression.html */ static int16_t MuLawDecompressTable[256] = { -32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956, -23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764, -15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412, -11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316, -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140, -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092, -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004, -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980, -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436, -1372, -1308, -1244, -1180, -1116, -1052, -988, -924, -876, -844, -812, -780, -748, -716, -684, -652, -620, -588, -556, -524, -492, -460, -428, -396, -372, -356, -340, -324, -308, -292, -276, -260, -244, -228, -212, -196, -180, -164, -148, -132, -120, -112, -104, -96, -88, -80, -72, -64, -56, -48, -40, -32, -24, -16, -8, 0, 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956, 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764, 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412, 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316, 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140, 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092, 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004, 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980, 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436, 1372, 1308, 1244, 1180, 1116, 1052, 988, 924, 876, 844, 812, 780, 748, 716, 684, 652, 620, 588, 556, 524, 492, 460, 428, 396, 372, 356, 340, 324, 308, 292, 276, 260, 244, 228, 212, 196, 180, 164, 148, 132, 120, 112, 104, 96, 88, 80, 72, 64, 56, 48, 40, 32, 24, 16, 8, 0 }; static int16_t ALawDecompressTable[256] = { -5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736, -7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784, -2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368, -3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392, -22016,-20992,-24064,-23040,-17920,-16896,-19968,-18944, -30208,-29184,-32256,-31232,-26112,-25088,-28160,-27136, -11008,-10496,-12032,-11520,-8960, -8448, -9984, -9472, -15104,-14592,-16128,-15616,-13056,-12544,-14080,-13568, -344, -328, -376, -360, -280, -264, -312, -296, -472, -456, -504, -488, -408, -392, -440, -424, -88, -72, -120, -104, -24, -8, -56, -40, -216, -200, -248, -232, -152, -136, -184, -168, -1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184, -1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696, -688, -656, -752, -720, -560, -528, -624, -592, -944, -912, -1008, -976, -816, -784, -880, -848, 5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736, 7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784, 2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368, 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392, 22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944, 30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136, 11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472, 15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568, 344, 328, 376, 360, 280, 264, 312, 296, 472, 456, 504, 488, 408, 392, 440, 424, 88, 72, 120, 104, 24, 8, 56, 40, 216, 200, 248, 232, 152, 136, 184, 168, 1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184, 1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696, 688, 656, 752, 720, 560, 528, 624, 592, 944, 912, 1008, 976, 816, 784, 880, 848 }; static void cs_reset(void *opaque) { CSState *s = opaque; s->regs[Index_Address] = 0x40; s->regs[Index_Data] = 0x00; s->regs[Status] = 0x00; s->regs[PIO_Data] = 0x00; s->dregs[Left_ADC_Input_Control] = 0x00; s->dregs[Right_ADC_Input_Control] = 0x00; s->dregs[Left_AUX1_Input_Control] = 0x88; s->dregs[Right_AUX1_Input_Control] = 0x88; s->dregs[Left_AUX2_Input_Control] = 0x88; s->dregs[Right_AUX2_Input_Control] = 0x88; s->dregs[Left_DAC_Output_Control] = 0x80; s->dregs[Right_DAC_Output_Control] = 0x80; s->dregs[FS_And_Playback_Data_Format] = 0x00; s->dregs[Interface_Configuration] = 0x08; s->dregs[Pin_Control] = 0x00; s->dregs[Error_Status_And_Initialization] = 0x00; s->dregs[MODE_And_ID] = 0x8a; s->dregs[Loopback_Control] = 0x00; s->dregs[Playback_Upper_Base_Count] = 0x00; s->dregs[Playback_Lower_Base_Count] = 0x00; s->dregs[Alternate_Feature_Enable_I] = 0x00; s->dregs[Alternate_Feature_Enable_II] = 0x00; s->dregs[Left_Line_Input_Control] = 0x88; s->dregs[Right_Line_Input_Control] = 0x88; s->dregs[Timer_Low_Base] = 0x00; s->dregs[Timer_High_Base] = 0x00; s->dregs[RESERVED] = 0x00; s->dregs[Alternate_Feature_Enable_III] = 0x00; s->dregs[Alternate_Feature_Status] = 0x00; s->dregs[Version_Chip_ID] = 0xa0; s->dregs[Mono_Input_And_Output_Control] = 0xa0; s->dregs[RESERVED_2] = 0x00; s->dregs[Capture_Data_Format] = 0x00; s->dregs[RESERVED_3] = 0x00; s->dregs[Capture_Upper_Base_Count] = 0x00; s->dregs[Capture_Lower_Base_Count] = 0x00; } static void cs_audio_callback (void *opaque, int free) { CSState *s = opaque; s->audio_free = free; } static void cs_reset_voices (CSState *s, uint32_t val) { int xtal; audsettings_t as; #ifdef DEBUG_XLAW if (val == 0 || val == 32) val = (1 << 4) | (1 << 5); #endif xtal = val & 1; as.freq = freqs[xtal][(val >> 1) & 7]; if (as.freq == -1) { lerr ("unsupported frequency (val=%#x)\n", val); goto error; } as.nchannels = (val & (1 << 4)) ? 2 : 1; as.endianness = 0; s->tab = NULL; switch ((val >> 5) & ((s->dregs[MODE_And_ID] & MODE2) ? 7 : 3)) { case 0: as.fmt = AUD_FMT_U8; s->shift = as.nchannels == 2; break; case 1: s->tab = MuLawDecompressTable; goto x_law; case 3: s->tab = ALawDecompressTable; x_law: as.fmt = AUD_FMT_S16; as.endianness = AUDIO_HOST_ENDIANNESS; s->shift = as.nchannels == 2; break; case 6: as.endianness = 1; case 2: as.fmt = AUD_FMT_S16; s->shift = as.nchannels; break; case 7: case 4: lerr ("attempt to use reserved format value (%#x)\n", val); goto error; case 5: lerr ("ADPCM 4 bit IMA compatible format is not supported\n"); goto error; } s->voice = AUD_open_out ( &s->card, s->voice, "cs4231a", s, cs_audio_callback, &as ); if (s->dregs[Interface_Configuration] & PEN) { if (!s->dma_running) { DMA_hold_DREQ (s->dma); AUD_set_active_out (s->voice, 1); s->transferred = 0; } s->dma_running = 1; } else { if (s->dma_running) { DMA_release_DREQ (s->dma); AUD_set_active_out (s->voice, 0); } s->dma_running = 0; } return; error: if (s->dma_running) { DMA_release_DREQ (s->dma); AUD_set_active_out (s->voice, 0); } } IO_READ_PROTO (cs_read) { CSState *s = opaque; uint32_t saddr, iaddr, ret; saddr = GET_SADDR (addr); iaddr = ~0U; switch (saddr) { case Index_Address: ret = s->regs[saddr] & ~0x80; break; case Index_Data: if (!(s->dregs[MODE_And_ID] & MODE2)) iaddr = s->regs[Index_Address] & 0x0f; else iaddr = s->regs[Index_Address] & 0x1f; ret = s->dregs[iaddr]; if (iaddr == Error_Status_And_Initialization) { /* keep SEAL happy */ if (s->aci_counter) { ret |= 1 << 5; s->aci_counter -= 1; } } break; default: ret = s->regs[saddr]; break; } dolog ("read %d:%d -> %d\n", saddr, iaddr, ret); return ret; } IO_WRITE_PROTO (cs_write) { CSState *s = opaque; uint32_t saddr, iaddr; saddr = GET_SADDR (addr); switch (saddr) { case Index_Address: if (!(s->regs[Index_Address] & MCE) && (val & MCE) && (s->dregs[Interface_Configuration] & (3 << 3))) s->aci_counter = conf.aci_counter; s->regs[Index_Address] = val & ~(1 << 7); break; case Index_Data: if (!(s->dregs[MODE_And_ID] & MODE2)) iaddr = s->regs[Index_Address] & 0x0f; else iaddr = s->regs[Index_Address] & 0x1f; switch (iaddr) { case RESERVED: case RESERVED_2: case RESERVED_3: lwarn ("attempt to write %#x to reserved indirect register %d\n", val, iaddr); break; case FS_And_Playback_Data_Format: if (s->regs[Index_Address] & MCE) { cs_reset_voices (s, val); } else { if (s->dregs[Alternate_Feature_Status] & PMCE) { val = (val & ~0x0f) | (s->dregs[iaddr] & 0x0f); cs_reset_voices (s, val); } else { lwarn ("[P]MCE(%#x, %#x) is not set, val=%#x\n", s->regs[Index_Address], s->dregs[Alternate_Feature_Status], val); break; } } s->dregs[iaddr] = val; break; case Interface_Configuration: val &= ~(1 << 5); /* D5 is reserved */ s->dregs[iaddr] = val; if (val & PPIO) { lwarn ("PIO is not supported (%#x)\n", val); break; } if (val & PEN) { if (!s->dma_running) { cs_reset_voices (s, s->dregs[FS_And_Playback_Data_Format]); } } else { if (s->dma_running) { DMA_release_DREQ (s->dma); AUD_set_active_out (s->voice, 0); s->dma_running = 0; } } break; case Error_Status_And_Initialization: lwarn ("attempt to write to read only register %d\n", iaddr); break; case MODE_And_ID: dolog ("val=%#x\n", val); if (val & MODE2) s->dregs[iaddr] |= MODE2; else s->dregs[iaddr] &= ~MODE2; break; case Alternate_Feature_Enable_I: if (val & TE) lerr ("timer is not yet supported\n"); s->dregs[iaddr] = val; break; case Alternate_Feature_Status: if ((s->dregs[iaddr] & PI) && !(val & PI)) { /* XXX: TI CI */ qemu_irq_lower (s->pic[s->irq]); s->regs[Status] &= ~INT; } s->dregs[iaddr] = val; break; case Version_Chip_ID: lwarn ("write to Version_Chip_ID register %#x\n", val); s->dregs[iaddr] = val; break; default: s->dregs[iaddr] = val; break; } dolog ("written value %#x to indirect register %d\n", val, iaddr); break; case Status: if (s->regs[Status] & INT) { qemu_irq_lower (s->pic[s->irq]); } s->regs[Status] &= ~INT; s->dregs[Alternate_Feature_Status] &= ~(PI | CI | TI); break; case PIO_Data: lwarn ("attempt to write value %#x to PIO register\n", val); break; } } static int cs_write_audio (CSState *s, int nchan, int dma_pos, int dma_len, int len) { int temp, net; uint8_t tmpbuf[4096]; temp = len; net = 0; while (temp) { int left = dma_len - dma_pos; int copied; size_t to_copy; to_copy = audio_MIN (temp, left); if (to_copy > sizeof (tmpbuf)) { to_copy = sizeof (tmpbuf); } copied = DMA_read_memory (nchan, tmpbuf, dma_pos, to_copy); if (s->tab) { int i; int16_t linbuf[4096]; for (i = 0; i < copied; ++i) linbuf[i] = s->tab[tmpbuf[i]]; copied = AUD_write (s->voice, linbuf, copied << 1); copied >>= 1; } else { copied = AUD_write (s->voice, tmpbuf, copied); } temp -= copied; dma_pos = (dma_pos + copied) % dma_len; net += copied; if (!copied) { break; } } return net; } static int cs_dma_read (void *opaque, int nchan, int dma_pos, int dma_len) { CSState *s = opaque; int copy, written; int till = -1; copy = s->voice ? (s->audio_free >> (s->tab != NULL)) : dma_len; if (s->dregs[Pin_Control] & IEN) { till = (s->dregs[Playback_Lower_Base_Count] | (s->dregs[Playback_Upper_Base_Count] << 8)) << s->shift; till -= s->transferred; copy = audio_MIN (till, copy); } if ((copy <= 0) || (dma_len <= 0)) { return dma_pos; } written = cs_write_audio (s, nchan, dma_pos, dma_len, copy); dma_pos = (dma_pos + written) % dma_len; s->audio_free -= (written << (s->tab != NULL)); if (written == till) { s->regs[Status] |= INT; s->dregs[Alternate_Feature_Status] |= PI; s->transferred = 0; qemu_irq_raise (s->pic[s->irq]); } else { s->transferred += written; } return dma_pos; } static void cs_save(QEMUFile *f, void *opaque) { CSState *s = opaque; unsigned int i; uint32_t val; for (i = 0; i < CS_REGS; i++) qemu_put_be32s(f, &s->regs[i]); qemu_put_buffer(f, s->dregs, CS_DREGS); val = s->dma_running; qemu_put_be32s(f, &val); val = s->audio_free; qemu_put_be32s(f, &val); val = s->transferred; qemu_put_be32s(f, &val); val = s->aci_counter; qemu_put_be32s(f, &val); } static int cs_load(QEMUFile *f, void *opaque, int version_id) { CSState *s = opaque; unsigned int i; uint32_t val, dma_running; if (version_id > 1) return -EINVAL; for (i = 0; i < CS_REGS; i++) qemu_get_be32s(f, &s->regs[i]); qemu_get_buffer(f, s->dregs, CS_DREGS); qemu_get_be32s(f, &dma_running); qemu_get_be32s(f, &val); s->audio_free = val; qemu_get_be32s(f, &val); s->transferred = val; qemu_get_be32s(f, &val); s->aci_counter = val; if (dma_running && (s->dregs[Interface_Configuration] & PEN)) cs_reset_voices (s, s->dregs[FS_And_Playback_Data_Format]); return 0; } int cs4231a_init (AudioState *audio, qemu_irq *pic) { int i; CSState *s; if (!audio) { lerr ("No audio state\n"); return -1; } s = qemu_mallocz (sizeof (*s)); if (!s) { lerr ("Could not allocate memory for cs4231a (%zu bytes)\n", sizeof (*s)); return -1; } s->pic = pic; s->irq = conf.irq; s->dma = conf.dma; s->port = conf.port; for (i = 0; i < 4; i++) { register_ioport_write (s->port + i, 1, 1, cs_write, s); register_ioport_read (s->port + i, 1, 1, cs_read, s); } DMA_register_channel (s->dma, cs_dma_read, s); register_savevm ("cs4231a", 0, 1, cs_save, cs_load, s); qemu_register_reset (cs_reset, s); cs_reset (s); AUD_register_card (audio,"cs4231a", &s->card); return 0; }