summaryrefslogtreecommitdiffstats
path: root/sound/oss/gus_card.c
blob: a3d6ae33fe8b91cb059de03c9d542f613ba4f561 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
/*
 * sound/oss/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