gus_card.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:7k
- /*
- * sound/gus_card.c
- *
- * Detection routine for the Gravis Ultrasound.
- *
- * Copyright (C) by Hannu Savolainen 1993-1997
- *
- *
- * Frank van de Pol : Fixed GUS MAX interrupt handling, enabled simultanious
- * usage of CS4231A codec, GUS wave and MIDI for GUS MAX.
- * Christoph Hellwig: Adapted to module_init/module_exit, simple cleanups.
- *
- * Status:
- * Tested...
- */
-
-
- #include <linux/config.h>
- #include <linux/init.h>
- #include <linux/module.h>
- #include "sound_config.h"
- #include "gus.h"
- #include "gus_hw.h"
- void gusintr(int irq, void *dev_id, struct pt_regs *dummy);
- int gus_base = 0, gus_irq = 0, gus_dma = 0;
- int gus_no_wave_dma = 0;
- extern int gus_wave_volume;
- extern int gus_pcm_volume;
- extern int have_gus_max;
- int gus_pnp_flag = 0;
- #ifdef CONFIG_SOUND_GUS16
- static int db16 = 0; /* Has a Gus16 AD1848 on it */
- #endif
- static void __init attach_gus(struct address_info *hw_config)
- {
- gus_wave_init(hw_config);
- request_region(hw_config->io_base, 16, "GUS");
- request_region(hw_config->io_base + 0x100, 12, "GUS"); /* 0x10c-> is MAX */
- if (sound_alloc_dma(hw_config->dma, "GUS"))
- printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %dn", hw_config->dma);
- if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
- if (sound_alloc_dma(hw_config->dma2, "GUS(2)"))
- printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %dn", hw_config->dma2);
- gus_midi_init(hw_config);
- if(request_irq(hw_config->irq, gusintr, 0, "Gravis Ultrasound", hw_config)<0)
- printk(KERN_ERR "gus_card.c: Unable to allocate IRQ %dn", hw_config->irq);
- return;
- }
- static int __init probe_gus(struct address_info *hw_config)
- {
- int irq;
- int io_addr;
- if (hw_config->card_subtype == 1)
- gus_pnp_flag = 1;
- irq = hw_config->irq;
- if (hw_config->card_subtype == 0) /* GUS/MAX/ACE */
- if (irq != 3 && irq != 5 && irq != 7 && irq != 9 &&
- irq != 11 && irq != 12 && irq != 15)
- {
- printk(KERN_ERR "GUS: Unsupported IRQ %dn", irq);
- return 0;
- }
- if (check_region(hw_config->io_base, 16))
- printk(KERN_ERR "GUS: I/O range conflict (1)n");
- else if (check_region(hw_config->io_base + 0x100, 16))
- printk(KERN_ERR "GUS: I/O range conflict (2)n");
- else if (gus_wave_detect(hw_config->io_base))
- return 1;
- #ifndef EXCLUDE_GUS_IODETECT
- /*
- * Look at the possible base addresses (0x2X0, X=1, 2, 3, 4, 5, 6)
- */
- for (io_addr = 0x210; io_addr <= 0x260; io_addr += 0x10)
- if (io_addr != hw_config->io_base) /*
- * Already tested
- */
- if (!check_region(io_addr, 16))
- if (!check_region(io_addr + 0x100, 16))
- if (gus_wave_detect(io_addr))
- {
- hw_config->io_base = io_addr;
- return 1;
- }
- #endif
- printk("NO GUS card found !n");
- return 0;
- }
- static void __exit unload_gus(struct address_info *hw_config)
- {
- DDB(printk("unload_gus(%x)n", hw_config->io_base));
- gus_wave_unload(hw_config);
- release_region(hw_config->io_base, 16);
- release_region(hw_config->io_base + 0x100, 12); /* 0x10c-> is MAX */
- free_irq(hw_config->irq, hw_config);
- sound_free_dma(hw_config->dma);
- if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
- sound_free_dma(hw_config->dma2);
- }
- void gusintr(int irq, void *dev_id, struct pt_regs *dummy)
- {
- unsigned char src;
- extern int gus_timer_enabled;
- sti();
- #ifdef CONFIG_SOUND_GUSMAX
- if (have_gus_max) {
- struct address_info *hw_config = dev_id;
- adintr(irq, (void *)hw_config->slots[1], NULL);
- }
- #endif
- #ifdef CONFIG_SOUND_GUS16
- if (db16) {
- struct address_info *hw_config = dev_id;
- adintr(irq, (void *)hw_config->slots[3], NULL);
- }
- #endif
- while (1)
- {
- if (!(src = inb(u_IrqStatus)))
- return;
- if (src & DMA_TC_IRQ)
- {
- guswave_dma_irq();
- }
- if (src & (MIDI_TX_IRQ | MIDI_RX_IRQ))
- {
- gus_midi_interrupt(0);
- }
- if (src & (GF1_TIMER1_IRQ | GF1_TIMER2_IRQ))
- {
- if (gus_timer_enabled)
- sound_timer_interrupt();
- gus_write8(0x45, 0); /* Ack IRQ */
- gus_timer_command(4, 0x80); /* Reset IRQ flags */
- }
- if (src & (WAVETABLE_IRQ | ENVELOPE_IRQ))
- gus_voice_irq();
- }
- }
- /*
- * Some extra code for the 16 bit sampling option
- */
- #ifdef CONFIG_SOUND_GUS16
- static int __init probe_gus_db16(struct address_info *hw_config)
- {
- return ad1848_detect(hw_config->io_base, NULL, hw_config->osp);
- }
- static void __init attach_gus_db16(struct address_info *hw_config)
- {
- gus_pcm_volume = 100;
- gus_wave_volume = 90;
- hw_config->slots[3] = ad1848_init("GUS 16 bit sampling", hw_config->io_base,
- hw_config->irq,
- hw_config->dma,
- hw_config->dma, 0,
- hw_config->osp,
- THIS_MODULE);
- }
- static void __exit unload_gus_db16(struct address_info *hw_config)
- {
- ad1848_unload(hw_config->io_base,
- hw_config->irq,
- hw_config->dma,
- hw_config->dma, 0);
- sound_unload_audiodev(hw_config->slots[3]);
- }
- #endif
- #ifdef CONFIG_SOUND_GUS16
- static int gus16 = 0;
- #endif
- #ifdef CONFIG_SOUND_GUSMAX
- static int no_wave_dma = 0;/* Set if no dma is to be used for the
- wave table (GF1 chip) */
- #endif
- /*
- * Note DMA2 of -1 has the right meaning in the GUS driver as well
- * as here.
- */
- static struct address_info cfg;
- static int __initdata io = -1;
- static int __initdata irq = -1;
- static int __initdata dma = -1;
- static int __initdata dma16 = -1; /* Set this for modules that need it */
- static int __initdata type = 0; /* 1 for PnP */
- MODULE_PARM(io, "i");
- MODULE_PARM(irq, "i");
- MODULE_PARM(dma, "i");
- MODULE_PARM(dma16, "i");
- MODULE_PARM(type, "i");
- #ifdef CONFIG_SOUND_GUSMAX
- MODULE_PARM(no_wave_dma, "i");
- #endif
- #ifdef CONFIG_SOUND_GUS16
- MODULE_PARM(db16, "i");
- MODULE_PARM(gus16, "i");
- #endif
- MODULE_LICENSE("GPL");
- static int __init init_gus(void)
- {
- printk(KERN_INFO "Gravis Ultrasound audio driver Copyright (C) by Hannu Savolainen 1993-1996n");
- cfg.io_base = io;
- cfg.irq = irq;
- cfg.dma = dma;
- cfg.dma2 = dma16;
- cfg.card_subtype = type;
- #ifdef CONFIG_SOUND_GUSMAX
- gus_no_wave_dma = no_wave_dma;
- #endif
- if (cfg.io_base == -1 || cfg.dma == -1 || cfg.irq == -1) {
- printk(KERN_ERR "I/O, IRQ, and DMA are mandatoryn");
- return -EINVAL;
- }
- #ifdef CONFIG_SOUND_GUS16
- if (probe_gus_db16(&cfg) && gus16) {
- /* FIXME: This can't work, can it ? -- Christoph */
- attach_gus_db16(&cfg);
- db16 = 1;
- }
- #endif
- if (!probe_gus(&cfg))
- return -ENODEV;
- attach_gus(&cfg);
- return 0;
- }
- static void __exit cleanup_gus(void)
- {
- #ifdef CONFIG_SOUND_GUS16
- if (db16)
- unload_gus_db16(&cfg);
- #endif
- unload_gus(&cfg);
- }
- module_init(init_gus);
- module_exit(cleanup_gus);
- #ifndef MODULE
- static int __init setup_gus(char *str)
- {
- /* io, irq, dma, dma2 */
- int ints[5];
-
- str = get_options(str, ARRAY_SIZE(ints), ints);
-
- io = ints[1];
- irq = ints[2];
- dma = ints[3];
- dma16 = ints[4];
- return 1;
- }
- __setup("gus=", setup_gus);
- #endif