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-rw-r--r--sound/oss/gus_card.c293
1 files changed, 293 insertions, 0 deletions
diff --git a/sound/oss/gus_card.c b/sound/oss/gus_card.c
new file mode 100644
index 000000000000..dbb29771e2bb
--- /dev/null
+++ b/sound/oss/gus_card.c
@@ -0,0 +1,293 @@
+/*
+ * 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/interrupt.h>
+#include <linux/module.h>
+
+#include "sound_config.h"
+
+#include "gus.h"
+#include "gus_hw.h"
+
+irqreturn_t 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; /* Has a Gus16 AD1848 on it */
+#endif
+
+static void __init attach_gus(struct address_info *hw_config)
+{
+ gus_wave_init(hw_config);
+
+ if (sound_alloc_dma(hw_config->dma, "GUS"))
+ printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %d\n", 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 %d\n", 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 %d\n", 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 %d\n", irq);
+ return 0;
+ }
+ 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 */
+ continue;
+ 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);
+}
+
+irqreturn_t gusintr(int irq, void *dev_id, struct pt_regs *dummy)
+{
+ unsigned char src;
+ extern int gus_timer_enabled;
+ int handled = 0;
+
+#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)))
+ break;
+ handled = 1;
+ 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();
+ }
+ return IRQ_RETVAL(handled);
+}
+
+/*
+ * Some extra code for the 16 bit sampling option
+ */
+
+#ifdef CONFIG_SOUND_GUS16
+
+static int __init init_gus_db16(struct address_info *hw_config)
+{
+ struct resource *ports;
+
+ ports = request_region(hw_config->io_base, 4, "ad1848");
+ if (!ports)
+ return 0;
+
+ if (!ad1848_detect(ports, NULL, hw_config->osp)) {
+ release_region(hw_config->io_base, 4);
+ return 0;
+ }
+
+ gus_pcm_volume = 100;
+ gus_wave_volume = 90;
+
+ hw_config->slots[3] = ad1848_init("GUS 16 bit sampling", ports,
+ hw_config->irq,
+ hw_config->dma,
+ hw_config->dma, 0,
+ hw_config->osp,
+ THIS_MODULE);
+ return 1;
+}
+
+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;
+#endif
+#ifdef CONFIG_SOUND_GUSMAX
+static int no_wave_dma; /* 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_param(io, int, 0);
+module_param(irq, int, 0);
+module_param(dma, int, 0);
+module_param(dma16, int, 0);
+module_param(type, int, 0);
+#ifdef CONFIG_SOUND_GUSMAX
+module_param(no_wave_dma, int, 0);
+#endif
+#ifdef CONFIG_SOUND_GUS16
+module_param(db16, int, 0);
+module_param(gus16, int, 0);
+#endif
+MODULE_LICENSE("GPL");
+
+static int __init init_gus(void)
+{
+ printk(KERN_INFO "Gravis Ultrasound audio driver Copyright (C) by Hannu Savolainen 1993-1996\n");
+
+ 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 mandatory\n");
+ return -EINVAL;
+ }
+
+#ifdef CONFIG_SOUND_GUS16
+ if (gus16 && init_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
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-23 18:55:28 +0000