/* MikMod sound library (c) 1998, 1999 Miodrag Vallat and others - see file AUTHORS for complete list. 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 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 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 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /*============================================================================== Driver for GUS cards under DOS Written by Andrew Zabolotny ==============================================================================*/ #ifdef HAVE_CONFIG_H #include "config.h" #endif #ifdef DRV_ULTRA #include #include #include #include #include #include #include #include #include "dosgus.h" #include "mikmod.h" /* for MikMod_malloc() & co */ /********************************************* Private variables/routines *****/ /* The Gravis Ultrasound state/info */ __gus_state gus; /* Try to avoid holes in DRAM less than this size */ #define DRAM_HOLE_THRESHOLD 8192 /* If hole is larger than that, create a free block describing it */ #define DRAM_SPLIT_THRESHOLD 64 /* The size of DMA buffer used for RAM->DRAM transfers */ #define GF1_DMA_BUFFER_SIZE 8192 /* Debug macro: useful to change screen locations when some event occurs */ #ifdef MIKMOD_DEBUG # define DEBUG_PRINT(x) printf x; # define DEBUG_OFS(addr, attr) \ { \ unsigned short x; \ _dosmemgetw (0xb8780 + addr*2, 1, &x); \ if ((x >> 8) != attr) x = '0'; \ x = ((x + 1) & 0xff) | (attr << 8); \ _dosmemputw (&x, 1, 0xb8780 + addr*2); \ } #else # define DEBUG_PRINT(x) # define DEBUG_OFS(addr, attr) #endif static unsigned short __gus_volume_table[512] = { 0x0000, 0x7000, 0x7ff0, 0x8800, 0x8ff0, 0x9400, 0x9800, 0x9c00, 0x9ff0, 0xa200, 0xa400, 0xa600, 0xa800, 0xaa00, 0xac00, 0xae00, 0xaff0, 0xb100, 0xb200, 0xb300, 0xb400, 0xb500, 0xb600, 0xb700, 0xb800, 0xb900, 0xba00, 0xbb00, 0xbc00, 0xbd00, 0xbe00, 0xbf00, 0xbff0, 0xc080, 0xc100, 0xc180, 0xc200, 0xc280, 0xc300, 0xc380, 0xc400, 0xc480, 0xc500, 0xc580, 0xc600, 0xc680, 0xc700, 0xc780, 0xc800, 0xc880, 0xc900, 0xc980, 0xca00, 0xca80, 0xcb00, 0xcb80, 0xcc00, 0xcc80, 0xcd00, 0xcd80, 0xce00, 0xce80, 0xcf00, 0xcf80, 0xcff0, 0xd040, 0xd080, 0xd0c0, 0xd100, 0xd140, 0xd180, 0xd1c0, 0xd200, 0xd240, 0xd280, 0xd2c0, 0xd300, 0xd340, 0xd380, 0xd3c0, 0xd400, 0xd440, 0xd480, 0xd4c0, 0xd500, 0xd540, 0xd580, 0xd5c0, 0xd600, 0xd640, 0xd680, 0xd6c0, 0xd700, 0xd740, 0xd780, 0xd7c0, 0xd800, 0xd840, 0xd880, 0xd8c0, 0xd900, 0xd940, 0xd980, 0xd9c0, 0xda00, 0xda40, 0xda80, 0xdac0, 0xdb00, 0xdb40, 0xdb80, 0xdbc0, 0xdc00, 0xdc40, 0xdc80, 0xdcc0, 0xdd00, 0xdd40, 0xdd80, 0xddc0, 0xde00, 0xde40, 0xde80, 0xdec0, 0xdf00, 0xdf40, 0xdf80, 0xdfc0, 0xdff0, 0xe020, 0xe040, 0xe060, 0xe080, 0xe0a0, 0xe0c0, 0xe0e0, 0xe100, 0xe120, 0xe140, 0xe160, 0xe180, 0xe1a0, 0xe1c0, 0xe1e0, 0xe200, 0xe220, 0xe240, 0xe260, 0xe280, 0xe2a0, 0xe2c0, 0xe2e0, 0xe300, 0xe320, 0xe340, 0xe360, 0xe380, 0xe3a0, 0xe3c0, 0xe3e0, 0xe400, 0xe420, 0xe440, 0xe460, 0xe480, 0xe4a0, 0xe4c0, 0xe4e0, 0xe500, 0xe520, 0xe540, 0xe560, 0xe580, 0xe5a0, 0xe5c0, 0xe5e0, 0xe600, 0xe620, 0xe640, 0xe660, 0xe680, 0xe6a0, 0xe6c0, 0xe6e0, 0xe700, 0xe720, 0xe740, 0xe760, 0xe780, 0xe7a0, 0xe7c0, 0xe7e0, 0xe800, 0xe820, 0xe840, 0xe860, 0xe880, 0xe8a0, 0xe8c0, 0xe8e0, 0xe900, 0xe920, 0xe940, 0xe960, 0xe980, 0xe9a0, 0xe9c0, 0xe9e0, 0xea00, 0xea20, 0xea40, 0xea60, 0xea80, 0xeaa0, 0xeac0, 0xeae0, 0xeb00, 0xeb20, 0xeb40, 0xeb60, 0xeb80, 0xeba0, 0xebc0, 0xebe0, 0xec00, 0xec20, 0xec40, 0xec60, 0xec80, 0xeca0, 0xecc0, 0xece0, 0xed00, 0xed20, 0xed40, 0xed60, 0xed80, 0xeda0, 0xedc0, 0xede0, 0xee00, 0xee20, 0xee40, 0xee60, 0xee80, 0xeea0, 0xeec0, 0xeee0, 0xef00, 0xef20, 0xef40, 0xef60, 0xef80, 0xefa0, 0xefc0, 0xefe0, 0xeff0, 0xf010, 0xf020, 0xf030, 0xf040, 0xf050, 0xf060, 0xf070, 0xf080, 0xf090, 0xf0a0, 0xf0b0, 0xf0c0, 0xf0d0, 0xf0e0, 0xf0f0, 0xf100, 0xf110, 0xf120, 0xf130, 0xf140, 0xf150, 0xf160, 0xf170, 0xf180, 0xf190, 0xf1a0, 0xf1b0, 0xf1c0, 0xf1d0, 0xf1e0, 0xf1f0, 0xf200, 0xf210, 0xf220, 0xf230, 0xf240, 0xf250, 0xf260, 0xf270, 0xf280, 0xf290, 0xf2a0, 0xf2b0, 0xf2c0, 0xf2d0, 0xf2e0, 0xf2f0, 0xf300, 0xf310, 0xf320, 0xf330, 0xf340, 0xf350, 0xf360, 0xf370, 0xf380, 0xf390, 0xf3a0, 0xf3b0, 0xf3c0, 0xf3d0, 0xf3e0, 0xf3f0, 0xf400, 0xf410, 0xf420, 0xf430, 0xf440, 0xf450, 0xf460, 0xf470, 0xf480, 0xf490, 0xf4a0, 0xf4b0, 0xf4c0, 0xf4d0, 0xf4e0, 0xf4f0, 0xf500, 0xf510, 0xf520, 0xf530, 0xf540, 0xf550, 0xf560, 0xf570, 0xf580, 0xf590, 0xf5a0, 0xf5b0, 0xf5c0, 0xf5d0, 0xf5e0, 0xf5f0, 0xf600, 0xf610, 0xf620, 0xf630, 0xf640, 0xf650, 0xf660, 0xf670, 0xf680, 0xf690, 0xf6a0, 0xf6b0, 0xf6c0, 0xf6d0, 0xf6e0, 0xf6f0, 0xf700, 0xf710, 0xf720, 0xf730, 0xf740, 0xf750, 0xf760, 0xf770, 0xf780, 0xf790, 0xf7a0, 0xf7b0, 0xf7c0, 0xf7d0, 0xf7e0, 0xf7f0, 0xf800, 0xf810, 0xf820, 0xf830, 0xf840, 0xf850, 0xf860, 0xf870, 0xf880, 0xf890, 0xf8a0, 0xf8b0, 0xf8c0, 0xf8d0, 0xf8e0, 0xf8f0, 0xf900, 0xf910, 0xf920, 0xf930, 0xf940, 0xf950, 0xf960, 0xf970, 0xf980, 0xf990, 0xf9a0, 0xf9b0, 0xf9c0, 0xf9d0, 0xf9e0, 0xf9f0, 0xfa00, 0xfa10, 0xfa20, 0xfa30, 0xfa40, 0xfa50, 0xfa60, 0xfa70, 0xfa80, 0xfa90, 0xfaa0, 0xfab0, 0xfac0, 0xfad0, 0xfae0, 0xfaf0, 0xfb00, 0xfb10, 0xfb20, 0xfb30, 0xfb40, 0xfb50, 0xfb60, 0xfb70, 0xfb80, 0xfb90, 0xfba0, 0xfbb0, 0xfbc0, 0xfbd0, 0xfbe0, 0xfbf0, 0xfc00, 0xfc10, 0xfc20, 0xfc30, 0xfc40, 0xfc50, 0xfc60, 0xfc70, 0xfc80, 0xfc90, 0xfca0, 0xfcb0, 0xfcc0, 0xfcd0, 0xfce0, 0xfcf0, 0xfd00, 0xfd10, 0xfd20, 0xfd30, 0xfd40, 0xfd50, 0xfd60, 0xfd70, 0xfd80, 0xfd90, 0xfda0, 0xfdb0, 0xfdc0, 0xfdd0, 0xfde0, 0xfdf0, 0xfe00, 0xfe10, 0xfe20, 0xfe30, 0xfe40, 0xfe50, 0xfe60, 0xfe70, 0xfe80, 0xfe90, 0xfea0, 0xfeb0, 0xfec0, 0xfed0, 0xfee0, 0xfef0, 0xff00, 0xff10, 0xff20, 0xff30, 0xff40, 0xff50, 0xff60, 0xff70, 0xff80, 0xff90, 0xffa0, 0xffb0, 0xffc0, 0xffd0, 0xffe0, 0xfff0 }; /* Wait a bit for GUS before doing something * Mark function as volatile: don't allow it to be inlined. * It *should* be slow, no need to make it work faster :-) */ #if !defined(__GNUC__) || (__GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ == 0) # define _func_noinline volatile /* match original code */ # define _func_noclone #else /* avoid warnings from newer gcc: * "function definition has qualified void return type" and * function return types not compatible due to 'volatile' */ # define _func_noinline __attribute__((__noinline__)) # if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5) # define _func_noclone # else # define _func_noclone __attribute__((__noclone__)) # endif #endif _func_noinline _func_noclone void __gus_delay() { inportb(GF1_MIX_CTRL); inportb(GF1_MIX_CTRL); inportb(GF1_MIX_CTRL); inportb(GF1_MIX_CTRL); inportb(GF1_MIX_CTRL); inportb(GF1_MIX_CTRL); inportb(GF1_MIX_CTRL); inportb(GF1_MIX_CTRL); } static void __gus_stop_controller(unsigned char gf1reg) { register unsigned char value = __gus_inregb(gf1reg); __gus_outregb(gf1reg, (value | GF1VC_STOPPED | GF1VC_STOP) & ~(GF1VC_IRQ_PENDING | GF1VC_IRQ)); } /* Returns 1 if volume is already at given position */ static boolean __gus_volume_ramp_to(unsigned short volume, unsigned char rate, unsigned char vol_ctrl) { int svol = __gus_inregw(GF1R_VOLUME) & 0xfff0; int evol = volume; /* First of all, disable volume ramp */ __gus_stop_controller(GF1R_VOLUME_CONTROL); /* If voice is stopped, set the volume to zero and return */ if (__gus_inregb(GF1R_VOICE_CONTROL) & GF1VC_STOPPED) { __gus_outregw(GF1R_VOLUME, 0); return 1; } /* Avoid clicks when volume ramp goes too high or too low */ if (svol < 0x0400) svol = 0x0400; if (svol > 0xfc00) svol = 0xfc00; if (evol < 0x0400) evol = 0x0400; if (evol > 0xfc00) evol = 0xfc00; /* Adjust start/end positions */ if (svol > evol) { unsigned short tmp = evol; evol = svol; svol = tmp; vol_ctrl |= GF1VL_BACKWARD; } /* If we already are (near) the target volume, quit */ if (evol - svol < 0x1000) { __gus_outregw(GF1R_VOLUME, volume); return 1; } __gus_outregb(GF1R_VOLUME_START, svol >> 8); __gus_outregb(GF1R_VOLUME_END, evol >> 8); __gus_outregb(GF1R_VOLUME_RATE, rate); __gus_outregb_slow(GF1R_VOLUME_CONTROL, vol_ctrl); return 0; } static inline void __gus_stop_voice() { __gus_stop_controller(GF1R_VOICE_CONTROL); __gus_outregb_slow(GF1R_VOICE_CONTROL, GF1VC_STOPPED | GF1VC_STOP); } /* The GUS IRQ handler */ static void gf1_irq() { unsigned char irq_source; /* The contents of GF1_IRQ_STATUS register */ boolean timer_cb = 0; /* Call timer callback function */ DEBUG_OFS(0, 0xCE) gus.eow_ignore = 0; while ((irq_source = inportb(GF1_IRQ_STATUS))) { DEBUG_OFS(1, 0xCE) if (irq_source & GF1M_IRQ_DMA_COMPLETE) { DEBUG_OFS(4, 0x9F) /* reset the IRQ pending bit */ __gus_inregb(GF1R_DMA_CONTROL); gus.dma_active = 0; if (gus.dma_callback) gus.dma_callback(); } if (irq_source & (GF1M_IRQ_WAVETABLE | GF1M_IRQ_ENVELOPE)) { unsigned char vcirq; unsigned int done_mask = 0; /* IRQ bits are inverse (i.e. 0 = IRQ pending) */ while ((vcirq = __gus_inregb(GF1R_IRQ_SOURCE) ^ (GF1IRQ_WAVE | GF1IRQ_VOLUME)) & (GF1IRQ_WAVE | GF1IRQ_VOLUME)) { unsigned long voice = (vcirq & 0x1f); unsigned char voice_ctl, volume_ctl; unsigned int voice_mask = (1 << voice); /* Don't handle more than one IRQ from same voice */ if (done_mask & voice_mask) continue; done_mask |= voice_mask; /* Read voice/volume selection registers */ __gus_select_voice(voice); voice_ctl = __gus_inregb(GF1R_VOICE_CONTROL); volume_ctl = __gus_inregb(GF1R_VOLUME_CONTROL); if ((vcirq & GF1IRQ_WAVE) && (gus.wt_callback) && !(gus.eow_ignore & voice_mask)) { DEBUG_OFS(5, 0xAF) gus.wt_callback(voice, voice_ctl, volume_ctl); } if ((vcirq & GF1IRQ_VOLUME) && (gus.vl_callback)) { DEBUG_OFS(6, 0xAF) gus.vl_callback(voice, voice_ctl, volume_ctl); } } } /* Reset timers that sent this IRQ */ if (irq_source & (GF1M_IRQ_TIMER1 | GF1M_IRQ_TIMER2)) { unsigned char timer_ctl = gus.timer_ctl_reg; if (irq_source & GF1M_IRQ_TIMER1) timer_ctl &= ~GF1M_TIMER1; if (irq_source & GF1M_IRQ_TIMER2) timer_ctl &= ~GF1M_TIMER2; __gus_outregb_slow(GF1R_TIMER_CONTROL, timer_ctl); __gus_outregb_slow(GF1R_TIMER_CONTROL, gus.timer_ctl_reg); } if (irq_source & GF1M_IRQ_TIMER1) if (--gus.t1_countdown == 0) { gus.t1_countdown = gus.t1_multiple; gus.t1_ticks++; DEBUG_OFS(2, 0xCF) if (gus.t1_callback) { timer_cb = 1; gus.t1_callback(); } } if (irq_source & GF1M_IRQ_TIMER2) if (--gus.t2_countdown == 0) { gus.t2_countdown = gus.t2_multiple; gus.t2_ticks++; DEBUG_OFS(3, 0xCF) if (gus.t2_callback) gus.t2_callback(); } #if 0 /* The following are not used and implemented yet */ if (irq_source & (GF1M_IRQ_MIDI_TX | GF1M_IRQ_MIDI_RX)) { } #endif } irq_ack(gus.gf1_irq); if (timer_cb && gus.timer_callback) gus.timer_callback(); } static void gf1_irq_end() { } static boolean __gus_detect() { /* A relatively relaxed autodetection; We don't count on DRAM: GUS PnP could not have it (although its anyway bad for us) */ __gus_select_voice(0); __gus_stop_voice(); __gus_outregw(GF1R_FREQUENCY, 0x1234); __gus_outregw(GF1R_VOLUME, 0x5670); return ((__gus_inregw(GF1R_FREQUENCY) & 0xfffe) == 0x1234) && ((__gus_inregw(GF1R_VOLUME) & 0xfff0) == 0x5670); } static void __gus_reset(boolean reset_io_dma) { static unsigned char irqctl[16] = { 0, 0, 1, 3, 0, 2, 0, 4, 0, 0, 0, 5, 6, 0, 0, 7 }; static unsigned char dmactl[8] = { 0, 1, 0, 2, 0, 3, 4, 5 }; unsigned char irqtmp, dmatmp; /* Disable interrupts while resetting to avoid spurious IRQs */ int i, timer, old_ints = disable(); /* Stop the timer so that GUS IRQ won't clobber registers */ timer = (gus.timer_ctl_reg & GF1M_TIMER1); if (timer) gus_timer_stop(); gus.dma_active = 0; __gus_outregb(GF1R_RESET, 0); for (i = 0; i < 10; i++) __gus_delay(); __gus_outregb(GF1R_RESET, GF1M_MASTER_RESET); for (i = 0; i < 10; i++) __gus_delay(); outportb(GF1_MIDI_CTRL, GF1M_MIDI_RESET); for (i = 0; i < 10; i++) __gus_delay(); outportb(GF1_MIDI_CTRL, 0); /* Reset all IRQ sources */ __gus_outregb(GF1R_DMA_CONTROL, 0); __gus_outregb(GF1R_TIMER_CONTROL, 0); __gus_outregb(GF1R_SAMPLE_CONTROL, 0); /* Reset all voices */ gus_reset(gus.voices, gus.dynmask); /* Flush any pending IRQs */ inportb(GF1_IRQ_STATUS); __gus_inregb(GF1R_DMA_CONTROL); __gus_inregb(GF1R_SAMPLE_CONTROL); __gus_inregb(GF1R_IRQ_SOURCE); if (reset_io_dma) { /* Now set up the GUS card to required IRQs and DMAs */ if (gus.irq[0] == gus.irq[1]) irqtmp = irqctl[gus.irq[0]] | GF1M_IRQ_EQUAL; else irqtmp = irqctl[gus.irq[0]] | (irqctl[gus.irq[1]] << 3); if (gus.dma[0] == gus.dma[1]) dmatmp = dmactl[gus.dma[0]] | GF1M_DMA_EQUAL; else dmatmp = dmactl[gus.dma[0]] | (dmactl[gus.dma[1]] << 3); /* Reset IRQs if possible */ gus.mixer = GF1M_MIXER_NO_LINE_IN | GF1M_MIXER_NO_OUTPUT | GF1M_MIXER_GF1_IRQ; if (gus.version >= GUS_CARD_VERSION_CLASSIC1) { outportb(GF1_REG_CTRL, 0x05); outportb(GF1_MIX_CTRL, gus.mixer); outportb(GF1_IRQ_CTRL, 0x00); /* Reset IRQs */ outportb(GF1_REG_CTRL, 0x00); } /* Set up DMA channels: NEVER disable MIXER_GF1_IRQ in the future */ outportb(GF1_MIX_CTRL, gus.mixer); outportb(GF1_IRQ_CTRL, dmatmp); /* Set up IRQ channels */ outportb(GF1_MIX_CTRL, gus.mixer | GF1M_CONTROL_SELECT); outportb(GF1_IRQ_CTRL, irqtmp); } __gus_outregb(GF1R_RESET, GF1M_MASTER_RESET | GF1M_OUTPUT_ENABLE | GF1M_MASTER_IRQ); __gus_delay(); /* Flush IRQs again */ inportb(GF1_IRQ_STATUS); __gus_inregb(GF1R_DMA_CONTROL); __gus_inregb(GF1R_SAMPLE_CONTROL); __gus_inregb(GF1R_IRQ_SOURCE); _irq_ack(gus.irq[0]); _irq_ack(gus.irq[1]); if (timer) gus_timer_continue(); if (old_ints) enable(); /* Enable output */ __gus_mixer_output(1); } /* Transfer a block of data from GUS DRAM to main RAM through port I/O */ static void __gus_transfer_io_in(unsigned long address, unsigned char *source, unsigned long size) { while (size) { register unsigned int size64k; size64k = 0x10000 - (address & 0xffff); if (size64k > size) size64k = size; size -= size64k; __gus_outregb(GF1R_DRAM_HIGH, address >> 16); while (size64k--) { __gus_outregw(GF1R_DRAM_LOW, address++); *source++ = inportb(GF1_DRAM); } } } /* Transfer a block of data into GUS DRAM through port I/O */ static void __gus_transfer_io(unsigned long address, unsigned char *source, unsigned long size, int flags) { while (size) { register unsigned int size64k; size64k = 0x10000 - (address & 0xffff); if (size64k > size) size64k = size; size -= size64k; __gus_outregb(GF1R_DRAM_HIGH, address >> 16); if (flags & GUS_WAVE_INVERT) if (flags & GUS_WAVE_16BIT) while (size64k-- && size64k--) { __gus_outregw(GF1R_DRAM_LOW, address++); outportb(GF1_DRAM, *source++); __gus_outregw(GF1R_DRAM_LOW, address++); outportb(GF1_DRAM, (*source++) ^ 0x80); } else while (size64k--) { __gus_outregw(GF1R_DRAM_LOW, address++); outportb(GF1_DRAM, (*source++) ^ 0x80); } else while (size64k--) { __gus_outregw(GF1R_DRAM_LOW, address++); outportb(GF1_DRAM, *source++); } } } /* Wait for DMA transfer to finish between 8-9 1/18sec timer ticks */ static int __gus_wait_dma() { unsigned long timer; _farsetsel(_dos_ds); timer = _farnspeekl(0x46c); while (gus.dma_active) if (_farnspeekl(0x46c) - timer > 8) { /* Force DMA abort since something went wrong */ __gus_reset(0); return -1; } return 0; } /* Transfer a block of data into GUS DRAM through DMA controller */ static void __gus_transfer_dma(unsigned long address, unsigned char *source, unsigned long size, int flags) { unsigned char dma_control; unsigned long bytes_left; unsigned long cur_size; unsigned long dest_addr; if ((gus.dma[0] > 3) || (flags & GUS_WAVE_16BIT)) size = (size + 1) & ~1; bytes_left = size; while (bytes_left) { __gus_wait_dma(); cur_size = gus.dma_buff->size; if (cur_size > bytes_left) cur_size = bytes_left; bytes_left -= cur_size; dest_addr = address; if (gus.dma_buff->linear != source) memmove(gus.dma_buff->linear, source, cur_size); source += cur_size; address += cur_size; /* Disable GUS -> DMA tie */ __gus_outregb(GF1R_DMA_CONTROL, 0); __gus_delay(); /* Set up the DMA */ dma_start(gus.dma_buff, cur_size, DMA_MODE_WRITE); gus.dma_active = 1; /* Reset the DMA IRQ pending bit if set */ __gus_inregb(GF1R_DMA_CONTROL); /* The 16-bit DMA channels needs a slightly different approach */ dma_control = GF1M_DMAR_ENABLE | GF1M_DMAR_IRQ_ENABLE | gus.dma_rate; if (gus.dma[0] > 3) { dest_addr = __gus_convert_addr16(dest_addr); dma_control |= GF1M_DMAR_CHAN16; } __gus_outregw(GF1R_DMA_ADDRESS, dest_addr >> 4); if (flags & GUS_WAVE_16BIT) dma_control |= GF1M_DMAR_DATA16; if (flags & GUS_WAVE_INVERT) dma_control |= GF1M_DMAR_TOGGLE_SIGN; /* Tell GUS to start transfer */ __gus_outregb(GF1R_DMA_CONTROL, dma_control); } } static void __gus_detect_version() { unsigned char tmp; switch (gus.version = inportb(GF1_REVISION)) { case 5: gus.version = GUS_CARD_VERSION_CLASSIC_ICS; gus.ics = 1; gus.ics_flipped = 1; break; case 6: case 7: case 8: case 9: gus.version = GUS_CARD_VERSION_CLASSIC_ICS; gus.ics = 1; break; case 10: gus.version = GUS_CARD_VERSION_MAX; gus.codec = 1; break; case 11: gus.version = GUS_CARD_VERSION_MAX1; gus.codec = 1; break; case 0x30: gus.version = GUS_CARD_VERSION_ACE; break; case 0x50: gus.version = GUS_CARD_VERSION_EXTREME; break; case 0xff: /* Pre-3.7 board */ outportb(GF1_REG_CTRL, 0x20); tmp = inportb(GF1_REG_CTRL); if ((tmp != 0xff) && (tmp & 0x06)) gus.version = GUS_CARD_VERSION_CLASSIC1; else gus.version = GUS_CARD_VERSION_CLASSIC; break; default: /* Hmm... unknown revision. Assume a safe Classic model */ #ifdef MIKMOD_DEBUG fprintf(stderr, "libgus: Unknown board revision (%02x)\n", gus.version); #endif gus.version = GUS_CARD_VERSION_CLASSIC; break; } } static void __gus_detect_transfer() { unsigned char *outbuff, *inbuff; unsigned int i, j, seed = 0x13243546; __gus_transfer_func func; #define TRANSFER_SIZE 0x4000 outbuff = (unsigned char *) MikMod_malloc(TRANSFER_SIZE); inbuff = (unsigned char *) MikMod_malloc(TRANSFER_SIZE); /* Suppose we have an malfunctioning GUS */ gus.transfer = NULL; for (i = (gus.dma_buff ? 0 : 4); i <= 4; i++) { switch (i) { case 0: gus.dma_rate = GF1M_DMAR_RATE0; func = __gus_transfer_dma; break; case 1: gus.dma_rate = GF1M_DMAR_RATE1; func = __gus_transfer_dma; break; case 2: gus.dma_rate = GF1M_DMAR_RATE2; func = __gus_transfer_dma; break; case 3: gus.dma_rate = GF1M_DMAR_RATE3; func = __gus_transfer_dma; break; case 4: func = __gus_transfer_io; break; } /* Fill data array each time with pseudo-random values */ for (j = 0; j < TRANSFER_SIZE; j++) outbuff[j] = seed, seed = ((seed + 358979323) ^ (seed >> 16)) * 314159265; /* Transfer the random array to GUS */ /* Poke a security fence around dest block */ __gus_poke(0x100 - 1, 0xAA); __gus_poke(0x100 - 2, 0x55); __gus_poke(0x100 + TRANSFER_SIZE + 0, 0xAA); __gus_poke(0x100 + TRANSFER_SIZE + 1, 0x55); func(0x100, outbuff, TRANSFER_SIZE, 0); if (__gus_wait_dma() == 0) { /* Check if the security fence was not damaged */ if ((__gus_peek(0x100 - 1) != 0xAA) || (__gus_peek(0x100 - 2) != 0x55) || (__gus_peek(0x100 + TRANSFER_SIZE + 0) != 0xAA) || (__gus_peek(0x100 + TRANSFER_SIZE + 1) != 0x55)) continue; /* Now check if GUS DRAM really data that we expects to be transferred */ __gus_transfer_io_in(0x100, inbuff, TRANSFER_SIZE); if (memcmp(outbuff, inbuff, TRANSFER_SIZE) == 0) { gus.transfer = func; break; } } } #undef TRANSFER_SIZE MikMod_free(inbuff); MikMod_free(outbuff); } static void __gus_detect_memory() { unsigned int size; for (size = 0; size < 1024; size += 256) { __gus_poke(size * 1024, 0xaa); if (__gus_peek(size * 1024) != 0xaa) break; __gus_poke(size * 1024, 0x55); if (__gus_peek(size * 1024) != 0x55) break; } gus.ram = size; } static void __gus_init() { char *gusenv = getenv("ULTRASND"); memset((void *)&gus, 0, sizeof(gus)); gus.cmd_voice = -1; if (!gusenv) return; sscanf(gusenv, "%x,%d,%d,%d,%d", &gus.port, &gus.dma[0], &gus.dma[1], &gus.irq[0], &gus.irq[1]); /* A relaxed sanity check */ if ((gus.port < 0x100) || (gus.port > 0x1000) || (gus.irq[0] < 2) || (gus.irq[0] > 15) || (gus.irq[1] < 2) || (gus.irq[1] > 15) || (gus.dma[0] < 0) || (gus.dma[0] > 7) || (gus.dma[1] < 0) || (gus.dma[1] > 7)) return; gus.voices = 32; gus.timer_ctl = GF1M_MASK_TIMER1 | GF1M_MASK_TIMER2; /* Detect if the card is really there */ if (__gus_detect() == 0) return; /* Detect the version of Gravis Ultrasound */ __gus_detect_version(); /* Reset the card */ __gus_reset(1); /* Detect the amount of on-board memory */ __gus_detect_memory(); gus.ok = 1; } static void __gus_kick(gus_wave_t * wave, unsigned int wave_offset) { unsigned char vc; vc = GF1VC_IRQ; if (wave->format & GUS_WAVE_16BIT) vc |= GF1VC_DATA16; if (wave->format & GUS_WAVE_BACKWARD) vc |= GF1VC_BACKWARD; if (wave->format & GUS_WAVE_LOOP) { vc |= GF1VC_LOOP_ENABLE; if (wave->format & GUS_WAVE_BIDIR) vc |= GF1VC_BI_LOOP; } __gus_set_loop_start(vc, (wave->begin.memory << 4) + wave->loop_start); if (wave->format & GUS_WAVE_LOOP) __gus_set_loop_end(vc, (wave->begin.memory << 4) + wave->loop_end); else __gus_set_loop_end(vc, (wave->begin.memory + wave->size) << 4); __gus_set_current(vc, (wave->begin.memory << 4) + wave_offset + 100); __gus_outregb_slow(GF1R_VOICE_CONTROL, vc); } /* Timer 1 callback function (updates voices) */ static void __gus_timer_update() { gus_wave_t *wave; unsigned long wave_offset; unsigned char *src, *top; unsigned int vmask = (1 << gus.cur_voice); if (!gus.cmd_pool_ready) return; __gus_select_voice(gus.cur_voice); wave_offset = 0; src = gus.cmd_pool; top = gus.cmd_pool + gus.cmd_pool_top; #define GET_B *src #define GET_W *((unsigned short *)src) #define GET_L *((unsigned long *)src) while (src < top) { __gus_delay(); switch (GET_B++) { case PCMD_VOICE: __gus_select_voice(gus.cur_voice = GET_B++); vmask = (1 << gus.cur_voice); break; case PCMD_FREQ: /* __gus_outregw(GF1R_FREQUENCY, GET_W++);*/ __gus_outregw(GF1R_FREQUENCY, *(unsigned short *)src); src += 2; break; case PCMD_PAN: __gus_outregb(GF1R_BALANCE, GET_B++); break; case PCMD_VOLUME: __gus_volume_ramp_to(gus.cur_vol[gus.cur_voice] = /* GET_W++, GUS_VOLCHANGE_RAMP, GF1VL_IRQ);*/ *(unsigned short *)src, GUS_VOLCHANGE_RAMP, GF1VL_IRQ); src += 2; break; case PCMD_VOLUME_PREPARE: /* gus.cur_vol[gus.cur_voice] = GET_W++;*/ gus.cur_vol[gus.cur_voice] = *(unsigned short *)src; src += 2; break; case PCMD_OFFSET: /* wave_offset = GET_L++;*/ wave_offset = *(unsigned long *)src; src += 4; break; case PCMD_START: /* wave = (gus_wave_t *) GET_L++;*/ wave = (gus_wave_t *) *(unsigned long *)src; src += 4; gus.cur_wave[gus.cur_voice] = wave; gus.kick_offs[gus.cur_voice] = wave_offset; if (__gus_volume_ramp_to(0, GUS_VOLCHANGE_RAMP, GF1VL_IRQ)) { __gus_kick(wave, wave_offset); __gus_volume_ramp_to(gus.cur_vol[gus.cur_voice], GUS_VOLCHANGE_RAMP, GF1VL_IRQ); } else gus.voice_kick[gus.cur_voice] = 1; wave_offset = 0; gus.eow_ignore |= vmask; break; case PCMD_STOP: /* If volume is close to nothing, abort immediately instead of ramping */ gus.cur_vol[gus.cur_voice] = 0; gus.cur_wave[gus.cur_voice] = NULL; if (__gus_volume_ramp_to(0, GUS_VOLCHANGE_RAMP, GF1VL_IRQ)) __gus_stop_voice(); break; case PCMD_STOP_LOOP: __gus_outregb_slow(GF1R_VOICE_CONTROL, (__gus_inregb(GF1R_VOICE_CONTROL) | GF1VC_IRQ) & ~GF1VC_LOOP_ENABLE); __gus_outregb_slow(GF1R_VOLUME_CONTROL, __gus_inregb(GF1R_VOLUME_CONTROL) & ~GF1VL_ROLLOVER); break; default: /* Alarm! Break out immediately */ src = top; break; } } #undef GET_B #undef GET_W #undef GET_L gus.cmd_pool_ready = 0; gus.cmd_pool_top = 0; } static void __gus_wavetable_update(unsigned int voice, unsigned int voice_ctl, unsigned int volume_ctl) { gus_wave_t *wave = gus.cur_wave[voice]; if (!wave || !(wave->format & GUS_WAVE_LOOP)) { __gus_stop_voice(); gus.cur_wave[voice] = NULL; gus.cur_vol[voice] = 0; if (__gus_volume_ramp_to(0, GUS_VOLCHANGE_RAMP, GF1VL_IRQ)) __gus_stop_voice(); } } static void __gus_volume_update(unsigned int voice, unsigned int voice_ctl, unsigned int volume_ctl) { __gus_volume_ramp_to(gus.cur_vol[voice], GUS_VOLCHANGE_RAMP, GF1VL_IRQ); if (!gus.cur_wave[voice]) __gus_stop_voice(); else if (gus.voice_kick[voice]) __gus_kick(gus.cur_wave[voice], gus.kick_offs[voice]); gus.voice_kick[voice] = 0; } /***************************************************** GUS memory manager *****/ /* Mark all GUS memory as available */ static void __gus_mem_clear() { __gus_mcb *cur = gus.mcb; while (cur) { __gus_mcb *next = cur->next; if (cur != gus.mcb) MikMod_free(cur); cur = next; } if (!gus.mcb) gus.mcb = (__gus_mcb *) MikMod_malloc(sizeof(__gus_mcb)); gus.mcb->next = gus.mcb->prev = NULL; gus.mcb->addr = 0; gus.mcb->size = gus.ram * 1024; gus.mcb->free = 1; } /* Return amount of free memory */ static unsigned int __gus_mem_get_free() { __gus_mcb *cur = gus.mcb; unsigned int size = 0; if (!gus.open) return gus.ram * 1024; while (cur) { if (cur->free) size += cur->size; cur = cur->next; } return size; } /* Return largest size for a 8-bit sample */ static unsigned int __gus_mem_get_free_8() { __gus_mcb *cur = gus.mcb; unsigned int size = 0; if (!gus.open) return 0; while (cur) { if (cur->free && (cur->size > size)) size = cur->size; cur = cur->next; } return size; } /* Return largest size for a 16-bit sample */ static unsigned int __gus_mem_get_free_16() { __gus_mcb *cur = gus.mcb; unsigned int size = 0; if (!gus.open) return 0; while (cur) { if (cur->free) { unsigned int size16 = cur->size; unsigned int tmp; /* 16-bit samples cannot cross 256K boundaries */ tmp = 0x40000 - (cur->addr & 0x3ffff); if (size16 > tmp) size16 = tmp; /* 16-bit samples should be aligned on a 32-byte boundary */ size16 -= (32 - cur->addr) & 0x1f; if (size16 > size) size = size16; /* Now try vice versa: skip a portion of aligned memory */ size16 = (cur->addr + cur->size) - ((cur->addr + 0x3ffff) & ~0x3ffff); if ((size16 < 0x7fffffff) && (size16 > size)) size = size16; } cur = cur->next; } return size; } /* Allocate a segment of GUS DRAM for a sample with given bits per sample. * The algorithm tries to find the smallest free block that fits requested * size; but if found free block is larger by some (large) delta than * requested block size, the largest possible block is preffered. */ static unsigned int __gus_mem_alloc(unsigned int size, int bits16) { __gus_mcb *cur = gus.mcb; __gus_mcb *best_max = NULL, *best_min = NULL; unsigned int best_max_delta = 0, best_min_delta = 0xffffffff; unsigned int best_max_prefix = 0, best_min_prefix = 0; unsigned int memaddr, memsize; if (!gus.open || !size || (bits16 && size > 0x40000)) return -1; /* Round block size up to nearest acceptable DMA bound */ if (bits16) size = (size + 0x1f) & ~0x1f; else size = (size + 0x0f) & ~0x0f; while (cur) { if (cur->free) { unsigned char fits = 0; memsize = cur->size; memaddr = cur->addr; if (bits16) { /* 16-bit samples cannot cross 256K boundaries */ unsigned int tmp = 256 * 1024 - (memaddr & 0x3ffff); if (memsize > tmp) memsize = tmp; /* 16-bit samples should be aligned on a 32-byte boundary */ memsize -= (32 - memaddr) & 0x1f; memaddr = (memaddr + 0x1f) & ~0x1f; } /* If block fits, analyze it */ if (size <= memsize) fits = 1; /* Look if we still can complete the request by creating a free block */ else if (size <= cur->size) { /* Align start address to next 256k boundary */ unsigned int endaddr = cur->addr + cur->size; memaddr = (cur->addr + 0x3ffff) & ~0x3ffff; /* Can we split current block by inserting a free block at the beginning? */ if ((memaddr < endaddr) && (memaddr + size <= endaddr)) fits = 1; } if (fits) { unsigned int size_delta = cur->size - size; unsigned int size_prefix = memaddr - cur->addr; if (size_delta < best_min_delta) best_min = cur, best_min_delta = size_delta, best_min_prefix = size_prefix; if (size_delta > best_max_delta) best_max = cur, best_max_delta = size_delta, best_max_prefix = size_prefix; } } cur = cur->next; } if (!best_min) return -1; /* If minimal block that fits is too large, use largest block that fits */ /* But if using the maximal block is going to create a small hole, forget it */ if ((best_max_prefix == 0) || (best_max_prefix >= DRAM_HOLE_THRESHOLD) || (best_min_prefix != 0)) if ( ((best_min_delta < DRAM_HOLE_THRESHOLD) && (best_max_delta >= DRAM_HOLE_THRESHOLD)) || ((best_min_prefix > 0) && (best_min_prefix < DRAM_HOLE_THRESHOLD) && ((best_max_prefix == 0) || (best_max_prefix > best_min_prefix))) || ((best_min_prefix != 0) && (best_max_prefix == 0))) { best_min = best_max; best_min_delta = best_max_delta; best_min_prefix = best_max_prefix; } /* Compute the DRAM address to return */ memaddr = best_min->addr + best_min_prefix; if (bits16) memaddr = (memaddr + 0x1f) & ~0x1f; else memaddr = (memaddr + 0x0f) & ~0x0f; /* If we have a considerable hole at the beginning of sample, create a free node describing the hole */ if (memaddr - best_min->addr >= DRAM_SPLIT_THRESHOLD) { __gus_mcb *newmcb = (__gus_mcb *) MikMod_malloc(sizeof(__gus_mcb)); newmcb->prev = best_min->prev; newmcb->next = best_min; newmcb->addr = best_min->addr; newmcb->size = memaddr - best_min->addr; newmcb->free = 1; best_min->addr = memaddr; best_min->size -= newmcb->size; best_min->prev = newmcb; if (newmcb->prev) newmcb->prev->next = newmcb; } /* Compute the size of hole at the end of block */ memsize = (best_min->addr + best_min->size) - (memaddr + size); /* Split the block if the block is larger than requested amount */ if (memsize > DRAM_SPLIT_THRESHOLD) { /* The next node cannot be free since free blocks are always glued together */ __gus_mcb *newmcb = (__gus_mcb *) MikMod_malloc(sizeof(__gus_mcb)); best_min->size -= memsize; newmcb->prev = best_min; newmcb->next = best_min->next; newmcb->addr = best_min->addr + best_min->size; newmcb->size = memsize; newmcb->free = 1; if (best_min->next) best_min->next->prev = newmcb; best_min->next = newmcb; } best_min->free = 0; return memaddr; } static void __gus_mem_free(unsigned int addr) { __gus_mcb *cur = gus.mcb; while (cur) { if (!cur->free && (cur->addr <= addr) && (cur->addr + cur->size > addr)) { cur->free = 1; /* If next block is free as well, link them together */ if (cur->next && cur->next->free) { __gus_mcb *next = cur->next; cur->size += next->size; cur->next = next->next; if (next->next) next->next->prev = cur; MikMod_free(next); } /* If previous block is free, link current block with it */ if (cur->prev && cur->prev->free) { cur->prev->size += cur->size; cur->prev->next = cur->next; if (cur->next) cur->next->prev = cur->prev; MikMod_free(cur); } return; } cur = cur->next; } } static void __gus_mem_pack() { } #ifdef MIKMOD_DEBUG /* Debug dump of GUS DRAM heap */ void __gus_mem_dump() { __gus_mcb *cur = gus.mcb; fprintf(stderr, "/-- Offset --+-- Prev --+-- Size --+-- Free --\\\n"); while (cur) { fprintf(stderr, "| %08X | %08X | %6d | %s |\n", cur->addr, cur->prev ? cur->prev->addr : -1, cur->size, cur->free ? "yes" : " no"); cur = cur->next; } fprintf(stderr, "\\------------+----------+----------+----------/\n"); } #endif /************************************************** Middle-level routines *****/ static int __gus_instrument_free(gus_instrument_t * instrument) { gus_instrument_t **cur_instr; gus_layer_t *cur_layer; gus_wave_t *cur_wave, *wave_head; /* Remove the instrument from the list of registered instruments */ cur_instr = (gus_instrument_t **) & gus.instr; while (*cur_instr) { if (*cur_instr == instrument) { *cur_instr = instrument->next; goto instr_loaded; } cur_instr = &(*cur_instr)->next; } return -1; instr_loaded: wave_head = NULL; for (cur_layer = instrument->info.layer; cur_layer; cur_layer = cur_layer->next) /* Free all waves */ for (cur_wave = cur_layer->wave; cur_wave; cur_wave = cur_wave->next) { if (!wave_head) wave_head = cur_wave; if (cur_wave->begin.memory != (unsigned int)-1) __gus_mem_free(cur_wave->begin.memory); } if (wave_head) MikMod_free(wave_head); MikMod_free(instrument->info.layer); if (instrument->name) MikMod_free(instrument->name); MikMod_free(instrument); return 0; } static gus_instrument_t *__gus_instrument_get(int program) { gus_instrument_t *cur_instr = (gus_instrument_t *) gus.instr; while (cur_instr) { if (cur_instr->number.instrument == program) return cur_instr; cur_instr = cur_instr->next; } return NULL; } static gus_instrument_t *__gus_instrument_copy(gus_instrument_t * instrument) { gus_instrument_t **cur_instr, *instr; gus_layer_t *cur_layer, *dest_layer; gus_wave_t *cur_wave, *dest_wave; unsigned int waves, layers; if (!instrument || !instrument->info.layer || !gus.open) return NULL; if (__gus_instrument_get(instrument->number.instrument)) return NULL; instr = (gus_instrument_t *) MikMod_malloc(sizeof(gus_instrument_t)); *instr = *instrument; if (instrument->name) instr->name = MikMod_strdup(instrument->name); /* Make a copy of all layers at once */ for (layers = 0, cur_layer = instrument->info.layer; cur_layer; layers++) cur_layer = cur_layer->next; if (!(dest_layer = instr->info.layer = (gus_layer_t *) MikMod_malloc(sizeof(gus_layer_t) * layers))) { if (instr->name) MikMod_free(instr->name); MikMod_free(instr); return NULL; } for (waves = 0, cur_layer = instrument->info.layer; cur_layer; cur_layer = cur_layer->next) { *dest_layer = *cur_layer; dest_layer->wave = NULL; /* Count the total number of waves */ for (cur_wave = cur_layer->wave; cur_wave; cur_wave = cur_wave->next) waves++; if (cur_layer->next) dest_layer->next = dest_layer + 1; else dest_layer->next = NULL; dest_layer++; } /* Allocate memory for waves */ if (!(dest_wave = (gus_wave_t *) MikMod_malloc(sizeof(gus_wave_t) * waves))) { MikMod_free(instr->info.layer); if (instr->name) MikMod_free(instr->name); MikMod_free(instr); return NULL; } for (cur_layer = instrument->info.layer, dest_layer = instr->info.layer; cur_layer; cur_layer = cur_layer->next, dest_layer = dest_layer->next) /* Copy all waves */ for (cur_wave = cur_layer->wave; cur_wave; cur_wave = cur_wave->next) { if (!dest_layer->wave) dest_layer->wave = dest_wave; *dest_wave = *cur_wave; /* Mark DRAM address as unallocated */ dest_wave->begin.memory = -1; if (cur_wave->next) dest_wave->next = (dest_wave + 1); else dest_wave->next = NULL; dest_wave++; } /* Insert the instrument into list of registered instruments */ cur_instr = (gus_instrument_t **) & gus.instr; while (*cur_instr) cur_instr = &(*cur_instr)->next; *cur_instr = instr; return instr; } static void __gus_instruments_clear() { gus_instrument_t *next_instr, *cur_instr = (gus_instrument_t *) gus.instr; while (cur_instr) { next_instr = cur_instr->next; __gus_instrument_free(cur_instr); cur_instr = next_instr; } } /******************************************************* libGUS interface *****/ /* return value: number of GUS cards installed in system */ int gus_cards() { if (!gus.ok) __gus_init(); return gus.ok ? 1 : 0; } int gus_info(gus_info_t * info, int reread) { if (!gus.ok) __gus_init(); if (!gus.ok) return -1; strcpy((char *)info->id, "gus0"); info->flags = (gus.ram ? GUS_STRU_INFO_F_PCM : 0); info->version = gus.version; info->port = gus.port; info->irq = gus.irq[0]; info->dma1 = gus.dma[0]; info->dma2 = gus.dma[1]; info->mixing_freq = gus.freq; info->memory_size = gus.ram * 1024; info->memory_free = __gus_mem_get_free(); info->memory_block_8 = __gus_mem_get_free_8(); info->memory_block_16 = __gus_mem_get_free_16(); return 0; } int gus_open(int card, size_t queue_buffer_size, int non_block) { __dpmi_meminfo struct_info, pool_info; if (!gus.ok) __gus_init(); if (!gus.ok || gus.open || card != 0) return -1; /* Now lock the gus structure in memory */ struct_info.address = __djgpp_base_address + (unsigned long)&gus; struct_info.size = sizeof(gus); if (__dpmi_lock_linear_region(&struct_info)) return -1; /* And hook the GF1 interrupt */ __irq_stack_count = 4; gus.gf1_irq = irq_hook(gus.irq[0], gf1_irq, (long)gf1_irq_end - (long)gf1_irq); __irq_stack_count = 1; if (!gus.gf1_irq) { __dpmi_unlock_linear_region(&struct_info); return -1; } /* Enable the interrupt */ irq_enable(gus.gf1_irq); if (gus.irq[0] > 7) _irq_enable(2); /* Allocate a DMA buffer: if we fail, we just use I/O so don't fail */ if ((gus.transfer == NULL) || (gus.transfer == __gus_transfer_dma)) gus.dma_buff = dma_allocate(gus.dma[0], GF1_DMA_BUFFER_SIZE); else gus.dma_buff = NULL; /* Detect the best available RAM -> DRAM transfer function */ if (!gus.transfer) { __gus_detect_transfer(); if (gus.transfer != __gus_transfer_dma || !gus.transfer) dma_free(gus.dma_buff), gus.dma_buff = NULL; /* If no transfer function worked, fail */ if (!gus.transfer) { if (gus.dma_buff) { dma_free(gus.dma_buff); gus.dma_buff = NULL; } __dpmi_unlock_linear_region(&struct_info); irq_unhook(gus.gf1_irq); gus.gf1_irq = NULL; return -1; } } /* Allocate and lock command pool buffer */ if (queue_buffer_size < 64) queue_buffer_size = 64; if (queue_buffer_size > 16384) queue_buffer_size = 16384; gus.cmd_pool = (unsigned char *) MikMod_malloc(queue_buffer_size); pool_info.address = __djgpp_base_address + (unsigned long)&gus.cmd_pool; pool_info.size = sizeof(queue_buffer_size); if (__dpmi_lock_linear_region(&pool_info)) { if (gus.dma_buff) { dma_free(gus.dma_buff); gus.dma_buff = NULL; } __dpmi_unlock_linear_region(&struct_info); irq_unhook(gus.gf1_irq); gus.gf1_irq = NULL; return -1; } gus.open++; __gus_mem_clear(); gus.t1_callback = __gus_timer_update; gus.wt_callback = __gus_wavetable_update; gus.vl_callback = __gus_volume_update; gus_do_tempo(60); /* Default is 60 Hz */ return 0; } int gus_close(int card) { __dpmi_meminfo struct_info; if (!gus.open || card != 0) return -1; /* First reset the card: disable any operation it can currently perform */ __gus_reset(0); gus.open--; /* Stop the timer */ gus_timer_stop(); /* Free DMA buffer if used */ if (gus.dma_buff) { dma_free(gus.dma_buff); gus.dma_buff = NULL; } /* And unhook the GF1 interrupt */ irq_unhook(gus.gf1_irq); gus.gf1_irq = NULL; /* Unlock the gus structure */ struct_info.address = __djgpp_base_address + (unsigned long)&gus; struct_info.size = sizeof(gus); __dpmi_unlock_linear_region(&struct_info); __gus_mem_clear(); __gus_instruments_clear(); return 0; } int gus_select(int card) { if (!gus.open || (card != 0)) return -1; return 0; } /* return value: same as gus_reset function note: this command doesn't change number of active voices and doesn't do hardware reset */ int gus_reset_engine_only() { gus.timer_base = 100; return 0; } int gus_reset(int voices, unsigned int channel_voices) { static unsigned short freq_table[32 - 14 + 1] = { 44100, 41160, 38587, 36317, 34300, 32494, 30870, 29400, 28063, 26843, 25725, 24696, 23746, 22866, 22050, 21289, 20580, 19916, 19293 }; int voice; int timer; /* No support for dynamically allocated voices for now */ gus.dynmask = channel_voices; if (voices < 14) voices = 14; if (voices > 32) voices = 32; /* Stop the timer so that GUS IRQ won't clobber registers */ timer = (gus.timer_ctl_reg & GF1M_TIMER1); if (timer) gus_timer_stop(); /* Stop all voices */ for (voice = 0; voice < 32; voice++) { __gus_select_voice(voice); __gus_stop_voice(); gus.cur_wave[voice] = NULL; gus.cur_vol[voice] = 0; __gus_delay(); /* Reset voice parameters to reasonable values */ __gus_set_current(0, 0); __gus_set_loop_start(0, 0); __gus_set_loop_end(0, 0); __gus_outregw(GF1R_VOLUME, 0); __gus_outregb(GF1R_VOLUME_RATE, 0); __gus_outregb(GF1R_VOLUME_START, 0); __gus_outregb(GF1R_VOLUME_END, 0); __gus_outregb(GF1R_BALANCE, 0x7); } voice = (__gus_inregb(GF1R_VOICES) & 0x1f) + 1; if (voice != voices) { int reset = __gus_inregb(GF1R_RESET); __gus_outregb(GF1R_RESET, reset & ~GF1M_OUTPUT_ENABLE); __gus_delay(); __gus_outregb(GF1R_VOICES, 0xc0 | (voices - 1)); __gus_delay(); __gus_outregb(GF1R_RESET, reset); } /* Compute the discretization frequence */ gus.voices = voices; if (gus.interwave) gus.freq = 44100; else gus.freq = freq_table[voices - 14]; gus_reset_engine_only(); if (timer) gus_timer_continue(); return gus.voices; } int gus_do_flush() { DEBUG_PRINT(("gus_do_flush: top = %d\n", gus.cmd_pool_top)) gus.cmd_pool_ready = 1; return 0; } /* set new tempo */ void gus_do_tempo(unsigned int tempo) { DEBUG_PRINT(("gus_do_tempo (%d)\n", tempo)) gus_timer_tempo(tempo); gus_timer_start(); } /* set voice frequency in Hz */ void gus_do_voice_frequency(unsigned char voice, unsigned int freq) { DEBUG_PRINT(("gus_do_voice_frequency (%d, %d)\n", voice, freq)) __pool_select_voice(voice); __pool_command_w(PCMD_FREQ, (((freq << 9) + (gus.freq >> 1)) / gus.freq) << 1); } /* set voice pan (0-16384) (full left - full right) */ void gus_do_voice_pan(unsigned char voice, unsigned short pan) { DEBUG_PRINT(("gus_do_voice_pan (%d, %d)\n", voice, pan)) pan >>= 10; if (pan > 15) pan = 15; __pool_select_voice(voice); __pool_command_b(PCMD_PAN, pan); } /* set voice volume level 0-16384 (linear) */ void gus_do_voice_volume(unsigned char voice, unsigned short vol) { DEBUG_PRINT(("gus_do_voice_volume (%d, %d)\n", voice, vol)) if (vol > 0x3fff) vol = 0x3fff; __pool_select_voice(voice); __pool_command_w(PCMD_VOLUME, __gus_volume_table[vol >> 5]); } /* start voice * voice : voice # * program : program # or ~0 = current * freq : frequency in Hz * volume : volume level (0-16384) or ~0 = current * pan : pan level (0-16384) or ~0 = current */ void gus_do_voice_start(unsigned char voice, unsigned int program, unsigned int freq, unsigned short volume, unsigned short pan) { gus_do_voice_start_position(voice, program, freq, volume, pan, 0); } /* start voice * voice : voice # * program : program # or ~0 = current * freq : frequency in Hz * volume : volume level (0-16384) or ~0 = current * pan : pan level (0-16384) or ~0 = current * position : offset to wave in bytes * 16 (lowest 4 bits - fraction) */ void gus_do_voice_start_position(unsigned char voice, unsigned int program, unsigned int freq, unsigned short volume, unsigned short pan, unsigned int position) { gus_instrument_t *instrument; gus_wave_t *wave; DEBUG_PRINT( ("gus_do_voice_start_position (%d, %d, pos: %d)\n", voice, program, position)) instrument = __gus_instrument_get(program); if (!instrument || !instrument->info.layer || !instrument->info.layer->wave || instrument->flags == GUS_INSTR_F_NOT_FOUND || instrument->flags == GUS_INSTR_F_NOT_LOADED) return; gus_do_voice_frequency(voice, freq); gus_do_voice_pan(voice, pan); /* We have to set volume different way, to avoid unneeded work in handler */ if (volume > 0x3fff) volume = 0x3fff; __pool_command_w(PCMD_VOLUME_PREPARE, __gus_volume_table[volume >> 5]); switch (instrument->mode) { case GUS_INSTR_SIMPLE: wave = instrument->info.layer->wave; if (position) __pool_command_l(PCMD_OFFSET, position); __pool_command_l(PCMD_START, (unsigned long)wave); break; } } /* stop voice * mode = 0 : stop voice now * mode = 1 : disable wave loop and finish it */ void gus_do_voice_stop(unsigned char voice, unsigned char mode) { __pool_select_voice(voice); if (mode) __pool_command(PCMD_STOP_LOOP); else __pool_command(PCMD_STOP); } /* wait x ticks - this command is block separator all commands between blocks are interpreted in the begining of one tick */ void gus_do_wait(unsigned int ticks) { DEBUG_PRINT(("gus_do_wait (%d)\n", ticks)) ticks += gus.t1_ticks; while ((int)(ticks - gus.t1_ticks) > 0); } int gus_get_voice_status(int voice) { __gus_select_voice(voice); return __gus_inregb(GF1R_VOICE_CONTROL) & GF1VC_STOPPED ? 0 : 1; } /* return value: file handle (descriptor) for /dev/gus */ int gus_get_handle() { /* Return stdout handle so that select() will "work" with it */ return 0; } /* return value: zero if instrument was successfully allocated */ int gus_memory_alloc(gus_instrument_t * instrument) { gus_instrument_t *instr = __gus_instrument_copy(instrument); gus_layer_t *cur_layer; gus_wave_t *cur_wave; DEBUG_PRINT(("gus_memory_alloc (%d)\n", instrument->number.instrument)) if (!instr) return -1; for (cur_layer = instr->info.layer; cur_layer; cur_layer = cur_layer->next) for (cur_wave = cur_layer->wave; cur_wave; cur_wave = cur_wave->next) { if (cur_layer->mode == GUS_INSTR_SIMPLE) { cur_wave->begin.memory = __gus_mem_alloc(cur_wave->size, cur_wave->format & GUS_WAVE_16BIT); if (cur_wave->begin.memory == (unsigned int)-1) { __gus_instrument_free(instr); return -1; } gus.transfer(cur_wave->begin.memory, cur_wave->begin.ptr, cur_wave->size, cur_wave->format); } else if (cur_layer->mode == GUS_INSTR_PATCH) /* not supported yet */ ; } return 0; } /* return value: zero if instrument was successfully removed */ int gus_memory_free(gus_instrument_t * instrument) { gus_instrument_t *cur_instr = gus.instr; DEBUG_PRINT(("gus_memory_free (%d)\n", instrument->number.instrument)) for (; cur_instr; cur_instr = cur_instr->next) if (cur_instr->number.instrument == instrument->number.instrument) return __gus_instrument_free(cur_instr); return -1; } /* return value: unused gus memory in bytes */ int gus_memory_free_size() { return __gus_mem_get_free(); } /* return value: zero if success */ int gus_memory_pack() { __gus_mem_pack(); return 0; } /* return value: gus memory size in bytes */ int gus_memory_size() { return gus.ram * 1024; } /* return value: current largest free block for 8-bit or 16-bit wave */ int gus_memory_free_block(int w_16bit) { return w_16bit ? __gus_mem_get_free_16() : __gus_mem_get_free_8(); } /* input value: see to GUS_DOWNLOAD_MODE_XXXX constants (gus.h) return value: zero if samples & instruments was successfully removed from GF1 memory manager */ int gus_memory_reset(int mode) { __gus_mem_clear(); __gus_instruments_clear(); return 0; } /* return value: zero if command queue was successfully flushed */ int gus_queue_flush() { return 0; } /* input value: echo buffer size in items (if 0 - erase echo buffer) */ int gus_queue_read_set_size(int items) { return 0; } /* input value: write queue size in items (each item have 8 bytes) */ int gus_queue_write_set_size(int items) { return 0; } /* return value: zero if successfull */ int gus_timer_start() { gus.timer_ctl_reg |= GF1M_TIMER1; __gus_outregb_slow(GF1R_TIMER_CONTROL, gus.timer_ctl_reg); gus.timer_ctl = gus.timer_ctl & ~GF1M_MASK_TIMER1; outportb(GF1_TIMER_CTRL, 0x04); outportb(GF1_TIMER_DATA, gus.timer_ctl | GF1M_START_TIMER1); return 0; } /* return value: zero if timer was stoped */ int gus_timer_stop() { gus.timer_ctl_reg &= ~GF1M_TIMER1; __gus_outregb_slow(GF1R_TIMER_CONTROL, gus.timer_ctl_reg); gus.timer_ctl = gus.timer_ctl | GF1M_MASK_TIMER1; outportb(GF1_TIMER_CTRL, 0x04); outportb(GF1_TIMER_DATA, gus.timer_ctl); return 0; } /* return value: zero if setup was success */ int gus_timer_tempo(int ticks) { unsigned int counter; /* Limit ticks per second to 1..1000 range */ if (ticks < 1) ticks = 1; if (ticks > 1000) ticks = 1000; /* GF1 timer1 period is 80 usecs, 12500 times per second */ counter = 1250000 / (ticks * gus.timer_base); gus.t1_multiple = 1; while (counter > 255) { counter >>= 1; gus.t1_multiple <<= 1; } gus.t1_countdown = gus.t1_multiple; __gus_outregb(GF1R_TIMER1, 256 - counter); return 0; } /* return value: zero if timer will be continue */ int gus_timer_continue() { return gus_timer_start(); } /* return value: zero if setup was success (default timebase = 100) */ int gus_timer_base(int base) { gus.timer_base = base; return 0; } void gus_timer_callback(void (*timer_callback) ()) { gus.timer_callback = timer_callback; } void gus_convert_delta(unsigned int type, unsigned char *dest, unsigned char *src, size_t size) { if (!(type & GUS_WAVE_DELTA)) return; /* This doesn't depend much on wave signedness, since addition/subtraction do not depend on operand signedness */ if (type & GUS_WAVE_16BIT) { unsigned short delta = type & GUS_WAVE_UNSIGNED ? 0x8000 : 0; while (size--) { delta = *(unsigned short *)dest = *(unsigned short *)src + delta; src += sizeof(unsigned short); dest += sizeof(unsigned short); } } else { unsigned char delta = type & GUS_WAVE_UNSIGNED ? 0x80 : 0; while (size--) { delta = *(unsigned char *)dest = *(unsigned char *)src + delta; src++; dest++; } } } int gus_dma_usage (int use) { if (gus.dma_buff) return -1; gus.transfer = __gus_transfer_io; return 0; } #endif /* DRV_ULTRA */ /* ex:set ts=4: */