189 lines
4.7 KiB
C
189 lines
4.7 KiB
C
/*
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* sound/gus_card.c
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*
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* Detection routine for the Gravis Ultrasound.
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*
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* Copyright by Hannu Savolainen 1993
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <i386/isa/sound/sound_config.h>
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#if defined(CONFIG_GUS)
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#include <i386/isa/sound/gus_hw.h>
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#include <i386/isa/sound/iwdefs.h>
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int gus_base, gus_irq, gus_dma;
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extern int gus_wave_volume;
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extern int gus_pcm_volume;
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extern int have_gus_max;
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extern int gus_timer_enabled;
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static sound_os_info *gus_osp;
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#ifndef NOGUSPNP
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int IwaveOpen(char voices, char mode, struct address_info * hw);
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#endif
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void
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attach_gus_card(struct address_info * hw_config)
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{
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int io_addr;
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gus_osp = hw_config->osp;
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snd_set_irq_handler(hw_config->irq, gusintr, hw_config->osp);
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if (gus_wave_detect(hw_config->io_base)) {
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/* Try first the default */
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gus_wave_init(hw_config);
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/* 0x10c-> is MAX */
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if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
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if (0)
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printf("gus_card.c: Can't allocate DMA channel2\n");
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#ifdef CONFIG_MIDI
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gus_midi_init();
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#endif
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return ;
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}
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#ifndef EXCLUDE_GUS_IODETECT
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/*
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* Look at the possible base addresses (0x2X0, X=1, 2, 3, 4, 5, 6)
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*/
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for (io_addr = 0x210; io_addr <= 0x260; io_addr += 0x10)
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if ( (io_addr != hw_config->io_base) /* Already tested */
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&& (gus_wave_detect(io_addr)) ) {
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hw_config->io_base = io_addr;
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printf(" WARNING! GUS found at %x, config was %x ",
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io_addr, hw_config->io_base);
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gus_wave_init(hw_config);
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/* 0x10c-> is MAX */
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if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
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if (0)
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printf("gus_card.c: Can't allocate DMA channel2\n");
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#ifdef CONFIG_MIDI
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gus_midi_init();
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#endif
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return ;
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}
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#endif
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}
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int
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probe_gus(struct address_info * hw_config)
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{
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int io_addr;
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gus_osp = hw_config->osp;
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#ifndef NOGUSPNP
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IwaveOpen((char) 32, (char) GUS_MODE, hw_config);
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#endif
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if (gus_wave_detect(hw_config->io_base))
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return 1;
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printf("oops I didnt find gus \n");
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#undef EXCLUDE_GUS_IODETECT
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#ifndef EXCLUDE_GUS_IODETECT
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/*
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* Look at the possible base addresses (0x2X0, X=1, 2, 3, 4, 5, 6)
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*/
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for (io_addr = 0x210; io_addr <= 0x260; io_addr += 0x10)
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if ( (io_addr != hw_config->io_base) /* Already tested */
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&& (gus_wave_detect(io_addr)) ) {
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hw_config->io_base = io_addr;
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return 1;
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}
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#endif
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return 0;
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}
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void
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gusintr(int irq)
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{
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u_char src;
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#ifdef CONFIG_GUSMAX
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if (have_gus_max)
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ad1848_interrupt(irq);
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#endif
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for (;;) {
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if (!(src = inb(u_IrqStatus)))
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return;
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if (src & DMA_TC_IRQ)
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guswave_dma_irq();
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#ifdef CONFIG_MIDI
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if (src & (MIDI_TX_IRQ | MIDI_RX_IRQ))
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gus_midi_interrupt(0);
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#endif
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if (src & (GF1_TIMER1_IRQ | GF1_TIMER2_IRQ)) {
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#ifdef CONFIG_SEQUENCER
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if (gus_timer_enabled)
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sound_timer_interrupt();
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gus_write8(0x45, 0); /* Ack IRQ */
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gus_timer_command(4, 0x80); /* Reset IRQ flags */
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#else
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gus_write8(0x45, 0); /* Stop timers */
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#endif
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}
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if (src & (WAVETABLE_IRQ | ENVELOPE_IRQ))
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gus_voice_irq();
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}
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}
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#endif
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/*
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* Some extra code for the 16 bit sampling option
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*/
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#if defined(CONFIG_GUS16)
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int
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probe_gus_db16(struct address_info * hw_config)
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{
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return ad1848_detect(hw_config->io_base, NULL, hw_config->osp);
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}
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void
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attach_gus_db16(struct address_info * hw_config)
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{
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gus_pcm_volume = 100;
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gus_wave_volume = 90;
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ad1848_init("GUS 16 bit sampling", hw_config->io_base,
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hw_config->irq,
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hw_config->dma,
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hw_config->dma, 0,
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hw_config->osp);
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}
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#endif
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