294 lines
6.4 KiB
C
294 lines
6.4 KiB
C
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/*
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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 (C) by Hannu Savolainen 1993-1997
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*
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*
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* Frank van de Pol : Fixed GUS MAX interrupt handling, enabled simultanious
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* usage of CS4231A codec, GUS wave and MIDI for GUS MAX.
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* Christoph Hellwig: Adapted to module_init/module_exit, simple cleanups.
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*
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* Status:
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* Tested...
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*/
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#include <linux/config.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include "sound_config.h"
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#include "gus.h"
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#include "gus_hw.h"
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irqreturn_t gusintr(int irq, void *dev_id, struct pt_regs *dummy);
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int gus_base = 0, gus_irq = 0, gus_dma = 0;
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int gus_no_wave_dma = 0;
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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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int gus_pnp_flag = 0;
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#ifdef CONFIG_SOUND_GUS16
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static int db16; /* Has a Gus16 AD1848 on it */
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#endif
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static void __init attach_gus(struct address_info *hw_config)
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{
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gus_wave_init(hw_config);
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if (sound_alloc_dma(hw_config->dma, "GUS"))
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printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %d\n", hw_config->dma);
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if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
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if (sound_alloc_dma(hw_config->dma2, "GUS(2)"))
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printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %d\n", hw_config->dma2);
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gus_midi_init(hw_config);
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if(request_irq(hw_config->irq, gusintr, 0, "Gravis Ultrasound", hw_config)<0)
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printk(KERN_ERR "gus_card.c: Unable to allocate IRQ %d\n", hw_config->irq);
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return;
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}
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static int __init probe_gus(struct address_info *hw_config)
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{
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int irq;
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int io_addr;
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if (hw_config->card_subtype == 1)
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gus_pnp_flag = 1;
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irq = hw_config->irq;
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if (hw_config->card_subtype == 0) /* GUS/MAX/ACE */
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if (irq != 3 && irq != 5 && irq != 7 && irq != 9 &&
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irq != 11 && irq != 12 && irq != 15)
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{
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printk(KERN_ERR "GUS: Unsupported IRQ %d\n", irq);
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return 0;
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}
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if (gus_wave_detect(hw_config->io_base))
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return 1;
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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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continue;
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if (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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}
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#endif
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printk("NO GUS card found !\n");
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return 0;
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}
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static void __exit unload_gus(struct address_info *hw_config)
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{
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DDB(printk("unload_gus(%x)\n", hw_config->io_base));
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gus_wave_unload(hw_config);
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release_region(hw_config->io_base, 16);
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release_region(hw_config->io_base + 0x100, 12); /* 0x10c-> is MAX */
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free_irq(hw_config->irq, hw_config);
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sound_free_dma(hw_config->dma);
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if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
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sound_free_dma(hw_config->dma2);
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}
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irqreturn_t gusintr(int irq, void *dev_id, struct pt_regs *dummy)
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{
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unsigned char src;
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extern int gus_timer_enabled;
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int handled = 0;
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#ifdef CONFIG_SOUND_GUSMAX
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if (have_gus_max) {
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struct address_info *hw_config = dev_id;
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adintr(irq, (void *)hw_config->slots[1], NULL);
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}
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#endif
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#ifdef CONFIG_SOUND_GUS16
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if (db16) {
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struct address_info *hw_config = dev_id;
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adintr(irq, (void *)hw_config->slots[3], NULL);
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}
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#endif
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while (1)
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{
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if (!(src = inb(u_IrqStatus)))
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break;
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handled = 1;
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if (src & DMA_TC_IRQ)
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{
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guswave_dma_irq();
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}
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if (src & (MIDI_TX_IRQ | MIDI_RX_IRQ))
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{
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gus_midi_interrupt(0);
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}
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if (src & (GF1_TIMER1_IRQ | GF1_TIMER2_IRQ))
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{
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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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}
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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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return IRQ_RETVAL(handled);
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}
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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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#ifdef CONFIG_SOUND_GUS16
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static int __init init_gus_db16(struct address_info *hw_config)
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{
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struct resource *ports;
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ports = request_region(hw_config->io_base, 4, "ad1848");
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if (!ports)
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return 0;
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if (!ad1848_detect(ports, NULL, hw_config->osp)) {
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release_region(hw_config->io_base, 4);
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return 0;
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}
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gus_pcm_volume = 100;
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gus_wave_volume = 90;
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hw_config->slots[3] = ad1848_init("GUS 16 bit sampling", ports,
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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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THIS_MODULE);
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return 1;
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}
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static void __exit unload_gus_db16(struct address_info *hw_config)
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{
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ad1848_unload(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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sound_unload_audiodev(hw_config->slots[3]);
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}
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#endif
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#ifdef CONFIG_SOUND_GUS16
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static int gus16;
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#endif
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#ifdef CONFIG_SOUND_GUSMAX
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static int no_wave_dma; /* Set if no dma is to be used for the
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wave table (GF1 chip) */
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#endif
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/*
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* Note DMA2 of -1 has the right meaning in the GUS driver as well
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* as here.
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*/
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static struct address_info cfg;
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static int __initdata io = -1;
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static int __initdata irq = -1;
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static int __initdata dma = -1;
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static int __initdata dma16 = -1; /* Set this for modules that need it */
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static int __initdata type = 0; /* 1 for PnP */
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module_param(io, int, 0);
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module_param(irq, int, 0);
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module_param(dma, int, 0);
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module_param(dma16, int, 0);
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module_param(type, int, 0);
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#ifdef CONFIG_SOUND_GUSMAX
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module_param(no_wave_dma, int, 0);
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#endif
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#ifdef CONFIG_SOUND_GUS16
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module_param(db16, int, 0);
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module_param(gus16, int, 0);
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#endif
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MODULE_LICENSE("GPL");
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static int __init init_gus(void)
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{
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printk(KERN_INFO "Gravis Ultrasound audio driver Copyright (C) by Hannu Savolainen 1993-1996\n");
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cfg.io_base = io;
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cfg.irq = irq;
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cfg.dma = dma;
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cfg.dma2 = dma16;
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cfg.card_subtype = type;
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#ifdef CONFIG_SOUND_GUSMAX
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gus_no_wave_dma = no_wave_dma;
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#endif
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if (cfg.io_base == -1 || cfg.dma == -1 || cfg.irq == -1) {
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printk(KERN_ERR "I/O, IRQ, and DMA are mandatory\n");
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return -EINVAL;
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}
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#ifdef CONFIG_SOUND_GUS16
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if (gus16 && init_gus_db16(&cfg))
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db16 = 1;
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#endif
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if (!probe_gus(&cfg))
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return -ENODEV;
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attach_gus(&cfg);
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return 0;
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}
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static void __exit cleanup_gus(void)
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{
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#ifdef CONFIG_SOUND_GUS16
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if (db16)
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unload_gus_db16(&cfg);
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#endif
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unload_gus(&cfg);
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}
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module_init(init_gus);
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module_exit(cleanup_gus);
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#ifndef MODULE
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static int __init setup_gus(char *str)
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{
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/* io, irq, dma, dma2 */
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int ints[5];
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str = get_options(str, ARRAY_SIZE(ints), ints);
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io = ints[1];
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irq = ints[2];
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dma = ints[3];
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dma16 = ints[4];
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return 1;
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}
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__setup("gus=", setup_gus);
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#endif
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