| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2004 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This library 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with this library; if not, write to the Free |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| */ |
| #include "SDL_config.h" |
| |
| /* |
| MiNT audio driver |
| using XBIOS functions (Falcon) |
| |
| Patrice Mandin, Didier Méquignon |
| */ |
| |
| #include <unistd.h> |
| #include <support.h> |
| |
| /* Mint includes */ |
| #include <mint/osbind.h> |
| #include <mint/falcon.h> |
| #include <mint/cookie.h> |
| |
| #include "SDL_audio.h" |
| #include "../SDL_audio_c.h" |
| #include "../SDL_sysaudio.h" |
| |
| #include "../../video/ataricommon/SDL_atarimxalloc_c.h" |
| |
| #include "SDL_mintaudio.h" |
| #include "SDL_mintaudio_dma8.h" |
| |
| /*--- Defines ---*/ |
| |
| #define MINT_AUDIO_DRIVER_NAME "mint_xbios" |
| |
| /* Debug print info */ |
| #define DEBUG_NAME "audio:xbios: " |
| #if 0 |
| #define DEBUG_PRINT(what) \ |
| { \ |
| printf what; \ |
| } |
| #else |
| #define DEBUG_PRINT(what) |
| #endif |
| |
| static unsigned long cookie_snd = 0; |
| |
| static void |
| MINTXBIOS_LockDevice(_THIS) |
| { |
| /* Stop replay */ |
| Buffoper(0); |
| } |
| |
| static void |
| MINTXBIOS_UnlockDevice(_THIS) |
| { |
| /* Restart replay */ |
| Buffoper(SB_PLA_ENA | SB_PLA_RPT); |
| } |
| |
| static void |
| MINTXBIOS_CloseDevice(_THIS) |
| { |
| if (this->hidden != NULL) { |
| /* Stop replay */ |
| SDL_MintAudio_WaitThread(); |
| Buffoper(0); |
| |
| if (!SDL_MintAudio_mint_present) { |
| /* Uninstall interrupt */ |
| Jdisint(MFP_DMASOUND); |
| } |
| |
| /* Wait if currently playing sound */ |
| while (SDL_MintAudio_mutex != 0) {} |
| |
| /* Clear buffers */ |
| if (SDL_MintAudio_audiobuf[0]) { |
| Mfree(SDL_MintAudio_audiobuf[0]); |
| SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL; |
| } |
| |
| /* Unlock sound system */ |
| Unlocksnd(); |
| |
| SDL_free(this->hidden); |
| this->hidden = NULL; |
| } |
| } |
| |
| /* Falcon XBIOS implementation of Devconnect() is buggy with external clock */ |
| static void |
| Devconnect2(int src, int dst, int sclk, int pre) |
| { |
| static const unsigned short MASK1[3] = { 0, 0x6000, 0 }; |
| static const unsigned short MASK2[4] = { 0xFFF0, 0xFF8F, 0xF0FF, 0x0FFF }; |
| static const unsigned short INDEX1[4] = { 1, 3, 5, 7 }; |
| static const unsigned short INDEX2[4] = { 0, 2, 4, 6 }; |
| unsigned short sync_div, dev_ctrl, dest_ctrl; |
| void *oldstack; |
| |
| if (dst == 0) { |
| return; |
| } |
| |
| oldstack = (void *) Super(0); |
| |
| dev_ctrl = DMAAUDIO_IO.dev_ctrl; |
| dest_ctrl = DMAAUDIO_IO.dest_ctrl; |
| dev_ctrl &= MASK2[src]; |
| |
| if (src == ADC) { |
| dev_ctrl |= MASK1[sclk]; |
| } else { |
| dev_ctrl |= (INDEX1[sclk] << (src << 4)); |
| } |
| |
| if (dst & DMAREC) { |
| dest_ctrl &= 0xFFF0; |
| dest_ctrl |= INDEX1[src]; |
| } |
| |
| if (dst & DSPRECV) { |
| dest_ctrl &= 0xFF8F; |
| dest_ctrl |= (INDEX1[src] << 4); |
| } |
| |
| if (dst & EXTOUT) { |
| dest_ctrl &= 0xF0FF; |
| dest_ctrl |= (INDEX1[src] << 8); |
| } |
| |
| if (dst & DAC) { |
| dev_ctrl &= 0x0FFF; |
| dev_ctrl |= MASK1[sclk]; |
| dest_ctrl &= 0x0FFF; |
| dest_ctrl |= (INDEX2[src] << 12); |
| } |
| |
| sync_div = DMAAUDIO_IO.sync_div; |
| if (sclk == CLKEXT) { |
| pre <<= 8; |
| sync_div &= 0xF0FF; |
| } else { |
| sync_div &= 0xFFF0; |
| } |
| sync_div |= pre; |
| |
| DMAAUDIO_IO.dev_ctrl = dev_ctrl; |
| DMAAUDIO_IO.dest_ctrl = dest_ctrl; |
| DMAAUDIO_IO.sync_div = sync_div; |
| |
| Super(oldstack); |
| } |
| |
| static void |
| MINTXBIOS_CheckExternalClock(_THIS) |
| { |
| #define SIZE_BUF_CLOCK_MEASURE (44100/10) |
| |
| unsigned long cookie_snd; |
| char *buffer; |
| int i, j; |
| |
| /* DSP present with its GPIO port ? */ |
| if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) { |
| return; |
| } |
| if ((cookie_snd & SND_DSP) == 0) { |
| return; |
| } |
| |
| buffer = Atari_SysMalloc(SIZE_BUF_CLOCK_MEASURE, MX_STRAM); |
| if (buffer == NULL) { |
| DEBUG_PRINT((DEBUG_NAME "Not enough memory for the measure\n")); |
| return; |
| } |
| SDL_memset(buffer, 0, SIZE_BUF_CLOCK_MEASURE); |
| |
| Buffoper(0); |
| Settracks(0, 0); |
| Setmontracks(0); |
| Setmode(MONO8); |
| Jdisint(MFP_TIMERA); |
| |
| for (i = 0; i < 2; i++) { |
| Gpio(GPIO_SET, 7); /* DSP port gpio outputs */ |
| Gpio(GPIO_WRITE, 2 + i); /* 22.5792/24.576 MHz for 44.1/48KHz */ |
| Devconnect2(DMAPLAY, DAC, CLKEXT, CLK50K); /* Matrix and clock source */ |
| Setbuffer(0, buffer, buffer + SIZE_BUF_CLOCK_MEASURE); /* Set buffer */ |
| Xbtimer(XB_TIMERA, 5, 38, SDL_MintAudio_XbiosInterruptMeasureClock); /* delay mode timer A, prediv /64, 1KHz */ |
| Jenabint(MFP_TIMERA); |
| SDL_MintAudio_clocktics = 0; |
| Buffoper(SB_PLA_ENA); |
| usleep(110000); |
| |
| if ((Buffoper(-1) & 1) == 0) { |
| if (SDL_MintAudio_clocktics) { |
| unsigned long khz; |
| |
| khz = |
| ((SIZE_BUF_CLOCK_MEASURE / |
| SDL_MintAudio_clocktics) + 1) & 0xFFFFFFFE; |
| DEBUG_PRINT((DEBUG_NAME "measure %d: freq=%lu KHz\n", |
| i + 1, khz)); |
| |
| if (khz == 44) { |
| for (j = 1; j < 4; j++) { |
| SDL_MintAudio_AddFrequency(this, |
| MASTERCLOCK_44K |
| / |
| (MASTERPREDIV_FALCON |
| * (1 << j)), |
| MASTERCLOCK_44K, |
| (1 << j) - 1, 2 + i); |
| } |
| } else if (khz == 48) { |
| for (j = 1; j < 4; j++) { |
| SDL_MintAudio_AddFrequency(this, |
| MASTERCLOCK_48K |
| / |
| (MASTERPREDIV_FALCON |
| * (1 << j)), |
| MASTERCLOCK_48K, |
| (1 << j) - 1, 2 + i); |
| } |
| } |
| } else { |
| DEBUG_PRINT((DEBUG_NAME "No measure\n")); |
| } |
| } else { |
| DEBUG_PRINT((DEBUG_NAME "No SDMA clock\n")); |
| } |
| |
| Buffoper(0); /* stop */ |
| Jdisint(MFP_TIMERA); /* Uninstall interrupt */ |
| } |
| |
| Mfree(buffer); |
| } |
| |
| static int |
| MINTXBIOS_CheckAudio(_THIS) |
| { |
| int i; |
| Uint32 extclock; |
| |
| DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ", |
| SDL_AUDIO_BITSIZE(this->spec.format))); |
| DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format))); |
| DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format))); |
| DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(this->spec.format))); |
| DEBUG_PRINT(("channels=%d, ", this->spec.channels)); |
| DEBUG_PRINT(("freq=%d\n", this->spec.freq)); |
| |
| this->spec.format |= SDL_AUDIO_MASK_SIGNED; /* Audio is always signed */ |
| |
| /* clamp out int32/float32 */ |
| if (SDL_AUDIO_BITSIZE(this->spec.format) >= 16) { |
| this->spec.format = AUDIO_S16MSB; /* Audio is always big endian */ |
| this->spec.channels = 2; /* 16 bits always stereo */ |
| } else if (this->spec.channels > 2) { |
| this->spec.channels = 2; /* no more than stereo! */ |
| } |
| |
| MINTAUDIO_freqcount = 0; |
| |
| /* Add external clocks if present */ |
| MINTXBIOS_CheckExternalClock(this); |
| |
| /* Standard clocks */ |
| for (i = 1; i < 12; i++) { |
| /* Remove unusable Falcon codec predivisors */ |
| if ((i == 6) || (i == 8) || (i == 10)) { |
| continue; |
| } |
| SDL_MintAudio_AddFrequency(this, |
| MASTERCLOCK_FALCON1 / |
| (MASTERPREDIV_FALCON * (i + 1)), |
| MASTERCLOCK_FALCON1, i, -1); |
| } |
| |
| #if 1 |
| for (i = 0; i < MINTAUDIO_freqcount; i++) { |
| DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n", |
| i, MINTAUDIO_frequencies[i].frequency, |
| MINTAUDIO_frequencies[i].masterclock, |
| MINTAUDIO_frequencies[i].predivisor)); |
| } |
| #endif |
| |
| MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, this->spec.freq); |
| this->spec.freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency; |
| |
| DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ", |
| SDL_AUDIO_BITSIZE(this->spec.format))); |
| DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format))); |
| DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format))); |
| DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(this->spec.format))); |
| DEBUG_PRINT(("channels=%d, ", this->spec.channels)); |
| DEBUG_PRINT(("freq=%d\n", this->spec.freq)); |
| |
| return 0; |
| } |
| |
| static void |
| MINTXBIOS_InitAudio(_THIS) |
| { |
| int channels_mode, dmaclock, prediv; |
| void *buffer; |
| |
| /* Stop currently playing sound */ |
| SDL_MintAudio_quit_thread = SDL_FALSE; |
| SDL_MintAudio_thread_finished = SDL_TRUE; |
| SDL_MintAudio_WaitThread(); |
| Buffoper(0); |
| |
| /* Set replay tracks */ |
| Settracks(0, 0); |
| Setmontracks(0); |
| |
| /* Select replay format */ |
| channels_mode = STEREO16; |
| switch (SDL_AUDIO_BITSIZE(this->spec.format)) { |
| case 8: |
| if (this->spec.channels == 2) { |
| channels_mode = STEREO8; |
| } else { |
| channels_mode = MONO8; |
| } |
| break; |
| } |
| if (Setmode(channels_mode) < 0) { |
| DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n")); |
| } |
| |
| dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock; |
| prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor; |
| if (MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits != -1) { |
| Gpio(GPIO_SET, 7); /* DSP port gpio outputs */ |
| Gpio(GPIO_WRITE, MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits); |
| Devconnect2(DMAPLAY, DAC | EXTOUT, CLKEXT, prediv); |
| } else { |
| Devconnect2(DMAPLAY, DAC, CLK25M, prediv); |
| } |
| |
| /* Set buffer */ |
| buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf]; |
| if (Setbuffer(0, buffer, buffer + this->spec.size) < 0) { |
| DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n")); |
| } |
| |
| if (SDL_MintAudio_mint_present) { |
| SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0); |
| } else { |
| /* Install interrupt */ |
| Jdisint(MFP_DMASOUND); |
| /*Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt); */ |
| Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt); |
| Jenabint(MFP_DMASOUND); |
| |
| if (Setinterrupt(SI_TIMERA, SI_PLAY) < 0) { |
| DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n")); |
| } |
| } |
| |
| /* Go */ |
| Buffoper(SB_PLA_ENA | SB_PLA_RPT); |
| DEBUG_PRINT((DEBUG_NAME "hardware initialized\n")); |
| } |
| |
| static int |
| MINTXBIOS_OpenDevice(_THIS, const char *devname, int iscapture) |
| { |
| /* Lock sound system */ |
| if (Locksnd() != 1) { |
| SDL_SetError("MINTXBIOS_OpenAudio: Audio system already in use"); |
| return 0; |
| } |
| |
| SDL_MintAudio_device = this; |
| |
| /* Check audio capabilities */ |
| if (MINTXBIOS_CheckAudio(this) == -1) { |
| return 0; |
| } |
| |
| /* Initialize all variables that we clean on shutdown */ |
| this->hidden = (struct SDL_PrivateAudioData *) |
| SDL_malloc((sizeof *this->hidden)); |
| if (this->hidden == NULL) { |
| SDL_OutOfMemory(); |
| return 0; |
| } |
| SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| |
| SDL_CalculateAudioSpec(&this->spec); |
| |
| /* Allocate memory for audio buffers in DMA-able RAM */ |
| DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", this->spec.size)); |
| |
| SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(this->spec.size * 2, MX_STRAM); |
| if (SDL_MintAudio_audiobuf[0] == NULL) { |
| SDL_free(this->hidden); |
| this->hidden = NULL; |
| SDL_OutOfMemory(); |
| return 0; |
| } |
| SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + this->spec.size; |
| SDL_MintAudio_numbuf = 0; |
| SDL_memset(SDL_MintAudio_audiobuf[0],this->spec.silence,this->spec.size*2); |
| SDL_MintAudio_audiosize = this->spec.size; |
| SDL_MintAudio_mutex = 0; |
| |
| DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", |
| SDL_MintAudio_audiobuf[0])); |
| DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", |
| SDL_MintAudio_audiobuf[1])); |
| |
| SDL_MintAudio_CheckFpu(); |
| |
| /* Setup audio hardware */ |
| MINTXBIOS_InitAudio(this); |
| |
| return 1; /* good to go. */ |
| } |
| |
| static int |
| MINTXBIOS_Init(SDL_AudioDriverImpl *impl) |
| { |
| unsigned long dummy = 0; |
| /*SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND); */ |
| SDL_MintAudio_mint_present = SDL_FALSE; |
| |
| /* We can't use XBIOS in interrupt with Magic, don't know about thread */ |
| if (Getcookie(C_MagX, &dummy) == C_FOUND) { |
| return (0); |
| } |
| |
| /* Cookie _SND present ? if not, assume ST machine */ |
| if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) { |
| cookie_snd = SND_PSG; |
| } |
| |
| /* Check if we have 16 bits audio */ |
| if ((cookie_snd & SND_16BIT) == 0) { |
| SDL_SetError(DEBUG_NAME "no 16-bit sound"); |
| return (0); |
| } |
| |
| /* Check if audio is lockable */ |
| if (Locksnd() != 1) { |
| SDL_SetError(DEBUG_NAME "audio locked by other application"); |
| return (0); |
| } |
| |
| Unlocksnd(); |
| |
| DEBUG_PRINT((DEBUG_NAME "XBIOS audio available!\n")); |
| |
| /* Set the function pointers */ |
| impl->OpenDevice = MINTXBIOS_OpenDevice; |
| impl->CloseDevice = MINTXBIOS_CloseDevice; |
| impl->LockAudio = MINTXBIOS_LockAudio; |
| impl->UnlockAudio = MINTXBIOS_UnlockAudio; |
| impl->OnlyHasDefaultOutputDevice = 1; |
| impl->ProvidesOwnCallbackThread = 1; |
| impl->SkipMixerLock = 1; |
| |
| return 1; |
| } |
| |
| AudioBootStrap MINTAUDIO_XBIOS_bootstrap = { |
| MINT_AUDIO_DRIVER_NAME, "MiNT XBIOS audio driver", MINTXBIOS_Init, 0 |
| }; |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
