4 * Detection routine for the Gravis Ultrasound.
6 * Copyright (C) by Hannu Savolainen 1993-1997
9 * Frank van de Pol : Fixed GUS MAX interrupt handling, enabled simultanious
10 * usage of CS4231A codec, GUS wave and MIDI for GUS MAX.
11 * Christoph Hellwig: Adapted to module_init/module_exit, simple cleanups.
18 #include <linux/config.h>
19 #include <linux/init.h>
20 #include <linux/interrupt.h>
21 #include <linux/module.h>
23 #include "sound_config.h"
28 irqreturn_t gusintr(int irq, void *dev_id, struct pt_regs *dummy);
30 int gus_base = 0, gus_irq = 0, gus_dma = 0;
31 int gus_no_wave_dma = 0;
32 extern int gus_wave_volume;
33 extern int gus_pcm_volume;
34 extern int have_gus_max;
36 #ifdef CONFIG_SOUND_GUS16
37 static int db16; /* Has a Gus16 AD1848 on it */
40 static void __init attach_gus(struct address_info *hw_config)
42 gus_wave_init(hw_config);
44 if (sound_alloc_dma(hw_config->dma, "GUS"))
45 printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %d\n", hw_config->dma);
46 if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
47 if (sound_alloc_dma(hw_config->dma2, "GUS(2)"))
48 printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %d\n", hw_config->dma2);
49 gus_midi_init(hw_config);
50 if(request_irq(hw_config->irq, gusintr, 0, "Gravis Ultrasound", hw_config)<0)
51 printk(KERN_ERR "gus_card.c: Unable to allocate IRQ %d\n", hw_config->irq);
56 static int __init probe_gus(struct address_info *hw_config)
61 if (hw_config->card_subtype == 1)
66 if (hw_config->card_subtype == 0) /* GUS/MAX/ACE */
67 if (irq != 3 && irq != 5 && irq != 7 && irq != 9 &&
68 irq != 11 && irq != 12 && irq != 15)
70 printk(KERN_ERR "GUS: Unsupported IRQ %d\n", irq);
73 if (gus_wave_detect(hw_config->io_base))
76 #ifndef EXCLUDE_GUS_IODETECT
79 * Look at the possible base addresses (0x2X0, X=1, 2, 3, 4, 5, 6)
82 for (io_addr = 0x210; io_addr <= 0x260; io_addr += 0x10) {
83 if (io_addr == hw_config->io_base) /* Already tested */
85 if (gus_wave_detect(io_addr)) {
86 hw_config->io_base = io_addr;
92 printk("NO GUS card found !\n");
96 static void __exit unload_gus(struct address_info *hw_config)
98 DDB(printk("unload_gus(%x)\n", hw_config->io_base));
100 gus_wave_unload(hw_config);
102 release_region(hw_config->io_base, 16);
103 release_region(hw_config->io_base + 0x100, 12); /* 0x10c-> is MAX */
104 free_irq(hw_config->irq, hw_config);
106 sound_free_dma(hw_config->dma);
108 if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
109 sound_free_dma(hw_config->dma2);
112 irqreturn_t gusintr(int irq, void *dev_id, struct pt_regs *dummy)
115 extern int gus_timer_enabled;
118 #ifdef CONFIG_SOUND_GUSMAX
120 struct address_info *hw_config = dev_id;
121 adintr(irq, (void *)hw_config->slots[1], NULL);
124 #ifdef CONFIG_SOUND_GUS16
126 struct address_info *hw_config = dev_id;
127 adintr(irq, (void *)hw_config->slots[3], NULL);
133 if (!(src = inb(u_IrqStatus)))
136 if (src & DMA_TC_IRQ)
140 if (src & (MIDI_TX_IRQ | MIDI_RX_IRQ))
142 gus_midi_interrupt(0);
144 if (src & (GF1_TIMER1_IRQ | GF1_TIMER2_IRQ))
146 if (gus_timer_enabled)
147 sound_timer_interrupt();
148 gus_write8(0x45, 0); /* Ack IRQ */
149 gus_timer_command(4, 0x80); /* Reset IRQ flags */
151 if (src & (WAVETABLE_IRQ | ENVELOPE_IRQ))
154 return IRQ_RETVAL(handled);
158 * Some extra code for the 16 bit sampling option
161 #ifdef CONFIG_SOUND_GUS16
163 static int __init probe_gus_db16(struct address_info *hw_config)
165 return ad1848_detect(hw_config->io_base, NULL, hw_config->osp);
168 static void __init attach_gus_db16(struct address_info *hw_config)
170 gus_pcm_volume = 100;
171 gus_wave_volume = 90;
173 hw_config->slots[3] = ad1848_init("GUS 16 bit sampling", hw_config->io_base,
181 static void __exit unload_gus_db16(struct address_info *hw_config)
184 ad1848_unload(hw_config->io_base,
188 sound_unload_audiodev(hw_config->slots[3]);
192 #ifdef CONFIG_SOUND_GUS16
195 #ifdef CONFIG_SOUND_GUSMAX
196 static int no_wave_dma; /* Set if no dma is to be used for the
197 wave table (GF1 chip) */
202 * Note DMA2 of -1 has the right meaning in the GUS driver as well
206 static struct address_info cfg;
208 static int __initdata io = -1;
209 static int __initdata irq = -1;
210 static int __initdata dma = -1;
211 static int __initdata dma16 = -1; /* Set this for modules that need it */
212 static int __initdata type = 0; /* 1 for PnP */
214 MODULE_PARM(io, "i");
215 MODULE_PARM(irq, "i");
216 MODULE_PARM(dma, "i");
217 MODULE_PARM(dma16, "i");
218 MODULE_PARM(type, "i");
219 #ifdef CONFIG_SOUND_GUSMAX
220 MODULE_PARM(no_wave_dma, "i");
222 #ifdef CONFIG_SOUND_GUS16
223 MODULE_PARM(db16, "i");
224 MODULE_PARM(gus16, "i");
226 MODULE_LICENSE("GPL");
228 static int __init init_gus(void)
230 printk(KERN_INFO "Gravis Ultrasound audio driver Copyright (C) by Hannu Savolainen 1993-1996\n");
236 cfg.card_subtype = type;
237 #ifdef CONFIG_SOUND_GUSMAX
238 gus_no_wave_dma = no_wave_dma;
241 if (cfg.io_base == -1 || cfg.dma == -1 || cfg.irq == -1) {
242 printk(KERN_ERR "I/O, IRQ, and DMA are mandatory\n");
246 #ifdef CONFIG_SOUND_GUS16
247 if (probe_gus_db16(&cfg) && gus16) {
248 /* FIXME: This can't work, can it ? -- Christoph */
249 attach_gus_db16(&cfg);
253 if (!probe_gus(&cfg))
260 static void __exit cleanup_gus(void)
262 #ifdef CONFIG_SOUND_GUS16
264 unload_gus_db16(&cfg);
269 module_init(init_gus);
270 module_exit(cleanup_gus);
273 static int __init setup_gus(char *str)
275 /* io, irq, dma, dma2 */
278 str = get_options(str, ARRAY_SIZE(ints), ints);
288 __setup("gus=", setup_gus);