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/init.h>
19 #include <linux/interrupt.h>
20 #include <linux/module.h>
22 #include "sound_config.h"
27 irqreturn_t gusintr(int irq, void *dev_id, struct pt_regs *dummy);
29 int gus_base = 0, gus_irq = 0, gus_dma = 0;
30 int gus_no_wave_dma = 0;
31 extern int gus_wave_volume;
32 extern int gus_pcm_volume;
33 extern int have_gus_max;
35 #ifdef CONFIG_SOUND_GUS16
36 static int db16; /* Has a Gus16 AD1848 on it */
39 static void __init attach_gus(struct address_info *hw_config)
41 gus_wave_init(hw_config);
43 if (sound_alloc_dma(hw_config->dma, "GUS"))
44 printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %d\n", hw_config->dma);
45 if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
46 if (sound_alloc_dma(hw_config->dma2, "GUS(2)"))
47 printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %d\n", hw_config->dma2);
48 gus_midi_init(hw_config);
49 if(request_irq(hw_config->irq, gusintr, 0, "Gravis Ultrasound", hw_config)<0)
50 printk(KERN_ERR "gus_card.c: Unable to allocate IRQ %d\n", hw_config->irq);
55 static int __init probe_gus(struct address_info *hw_config)
60 if (hw_config->card_subtype == 1)
65 if (hw_config->card_subtype == 0) /* GUS/MAX/ACE */
66 if (irq != 3 && irq != 5 && irq != 7 && irq != 9 &&
67 irq != 11 && irq != 12 && irq != 15)
69 printk(KERN_ERR "GUS: Unsupported IRQ %d\n", irq);
72 if (gus_wave_detect(hw_config->io_base))
75 #ifndef EXCLUDE_GUS_IODETECT
78 * Look at the possible base addresses (0x2X0, X=1, 2, 3, 4, 5, 6)
81 for (io_addr = 0x210; io_addr <= 0x260; io_addr += 0x10) {
82 if (io_addr == hw_config->io_base) /* Already tested */
84 if (gus_wave_detect(io_addr)) {
85 hw_config->io_base = io_addr;
91 printk("NO GUS card found !\n");
95 static void __exit unload_gus(struct address_info *hw_config)
97 DDB(printk("unload_gus(%x)\n", hw_config->io_base));
99 gus_wave_unload(hw_config);
101 release_region(hw_config->io_base, 16);
102 release_region(hw_config->io_base + 0x100, 12); /* 0x10c-> is MAX */
103 free_irq(hw_config->irq, hw_config);
105 sound_free_dma(hw_config->dma);
107 if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
108 sound_free_dma(hw_config->dma2);
111 irqreturn_t gusintr(int irq, void *dev_id, struct pt_regs *dummy)
114 extern int gus_timer_enabled;
117 #ifdef CONFIG_SOUND_GUSMAX
119 struct address_info *hw_config = dev_id;
120 adintr(irq, (void *)hw_config->slots[1], NULL);
123 #ifdef CONFIG_SOUND_GUS16
125 struct address_info *hw_config = dev_id;
126 adintr(irq, (void *)hw_config->slots[3], NULL);
132 if (!(src = inb(u_IrqStatus)))
135 if (src & DMA_TC_IRQ)
139 if (src & (MIDI_TX_IRQ | MIDI_RX_IRQ))
141 gus_midi_interrupt(0);
143 if (src & (GF1_TIMER1_IRQ | GF1_TIMER2_IRQ))
145 if (gus_timer_enabled)
146 sound_timer_interrupt();
147 gus_write8(0x45, 0); /* Ack IRQ */
148 gus_timer_command(4, 0x80); /* Reset IRQ flags */
150 if (src & (WAVETABLE_IRQ | ENVELOPE_IRQ))
153 return IRQ_RETVAL(handled);
157 * Some extra code for the 16 bit sampling option
160 #ifdef CONFIG_SOUND_GUS16
162 static int __init init_gus_db16(struct address_info *hw_config)
164 struct resource *ports;
166 ports = request_region(hw_config->io_base, 4, "ad1848");
170 if (!ad1848_detect(ports, NULL, hw_config->osp)) {
171 release_region(hw_config->io_base, 4);
175 gus_pcm_volume = 100;
176 gus_wave_volume = 90;
178 hw_config->slots[3] = ad1848_init("GUS 16 bit sampling", ports,
187 static void __exit unload_gus_db16(struct address_info *hw_config)
190 ad1848_unload(hw_config->io_base,
194 sound_unload_audiodev(hw_config->slots[3]);
198 #ifdef CONFIG_SOUND_GUS16
201 #ifdef CONFIG_SOUND_GUSMAX
202 static int no_wave_dma; /* Set if no dma is to be used for the
203 wave table (GF1 chip) */
208 * Note DMA2 of -1 has the right meaning in the GUS driver as well
212 static struct address_info cfg;
214 static int __initdata io = -1;
215 static int __initdata irq = -1;
216 static int __initdata dma = -1;
217 static int __initdata dma16 = -1; /* Set this for modules that need it */
218 static int __initdata type = 0; /* 1 for PnP */
220 module_param(io, int, 0);
221 module_param(irq, int, 0);
222 module_param(dma, int, 0);
223 module_param(dma16, int, 0);
224 module_param(type, int, 0);
225 #ifdef CONFIG_SOUND_GUSMAX
226 module_param(no_wave_dma, int, 0);
228 #ifdef CONFIG_SOUND_GUS16
229 module_param(db16, int, 0);
230 module_param(gus16, int, 0);
232 MODULE_LICENSE("GPL");
234 static int __init init_gus(void)
236 printk(KERN_INFO "Gravis Ultrasound audio driver Copyright (C) by Hannu Savolainen 1993-1996\n");
242 cfg.card_subtype = type;
243 #ifdef CONFIG_SOUND_GUSMAX
244 gus_no_wave_dma = no_wave_dma;
247 if (cfg.io_base == -1 || cfg.dma == -1 || cfg.irq == -1) {
248 printk(KERN_ERR "I/O, IRQ, and DMA are mandatory\n");
252 #ifdef CONFIG_SOUND_GUS16
253 if (gus16 && init_gus_db16(&cfg))
256 if (!probe_gus(&cfg))
263 static void __exit cleanup_gus(void)
265 #ifdef CONFIG_SOUND_GUS16
267 unload_gus_db16(&cfg);
272 module_init(init_gus);
273 module_exit(cleanup_gus);
276 static int __init setup_gus(char *str)
278 /* io, irq, dma, dma2 */
281 str = get_options(str, ARRAY_SIZE(ints), ints);
291 __setup("gus=", setup_gus);