Home Home > GIT Browse > stable-xen
summaryrefslogtreecommitdiff
blob: c4b0434c76046186e9141eb54a83435c75710c15 (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
/*
 *	Initialisation code for Cyrix/NatSemi VSA1 softaudio
 *
 *	(C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
 *
 * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
 * The older version (VSA1) provides fairly good soundblaster emulation
 * although there are a couple of bugs: large DMA buffers break record,
 * and the MPU event handling seems suspect. VSA2 allows the native driver
 * to control the AC97 audio engine directly and requires a different driver.
 *
 * Thanks to National Semiconductor for providing the needed information
 * on the XpressAudio(tm) internals.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * TO DO:
 *	Investigate whether we can portably support Cognac (5520) in the
 *	same manner.
 */

#include <linux/delay.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>

#include "sound_config.h"

#include "sb.h"

/*
 *	Read a soundblaster compatible mixer register.
 *	In this case we are actually reading an SMI trap
 *	not real hardware.
 */

static u8 mixer_read(unsigned long io, u8 reg)
{
	outb(reg, io + 4);
	udelay(20);
	reg = inb(io + 5);
	udelay(20);
	return reg;
}

static int probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct address_info *hw_config;
	unsigned long base;
	void __iomem *mem;
	unsigned long io;
	u16 map;
	u8 irq, dma8, dma16;
	int oldquiet;
	extern int sb_be_quiet;
		
	base = pci_resource_start(pdev, 0);
	if(base == 0UL)
		return 1;
	
	mem = ioremap(base, 128);
	if (!mem)
		return 1;
	map = readw(mem + 0x18);	/* Read the SMI enables */
	iounmap(mem);
	
	/* Map bits
		0:1	* 0x20 + 0x200 = sb base
		2	sb enable
		3	adlib enable
		5	MPU enable 0x330
		6	MPU enable 0x300
		
	   The other bits may be used internally so must be masked */

	io = 0x220 + 0x20 * (map & 3);	   
	
	if(map & (1<<2))
		printk(KERN_INFO "kahlua: XpressAudio at 0x%lx\n", io);
	else
		return 1;
		
	if(map & (1<<5))
		printk(KERN_INFO "kahlua: MPU at 0x300\n");
	else if(map & (1<<6))
		printk(KERN_INFO "kahlua: MPU at 0x330\n");
	
	irq = mixer_read(io, 0x80) & 0x0F;
	dma8 = mixer_read(io, 0x81);

	// printk("IRQ=%x MAP=%x DMA=%x\n", irq, map, dma8);
	
	if(dma8 & 0x20)
		dma16 = 5;
	else if(dma8 & 0x40)
		dma16 = 6;
	else if(dma8 & 0x80)
		dma16 = 7;
	else
	{
		printk(KERN_ERR "kahlua: No 16bit DMA enabled.\n");
		return 1;
	}
		
	if(dma8 & 0x01)
		dma8 = 0;
	else if(dma8 & 0x02)
		dma8 = 1;
	else if(dma8 & 0x08)
		dma8 = 3;
	else
	{
		printk(KERN_ERR "kahlua: No 8bit DMA enabled.\n");
		return 1;
	}
	
	if(irq & 1)
		irq = 9;
	else if(irq & 2)
		irq = 5;
	else if(irq & 4)
		irq = 7;
	else if(irq & 8)
		irq = 10;
	else
	{
		printk(KERN_ERR "kahlua: SB IRQ not set.\n");
		return 1;
	}
	
	printk(KERN_INFO "kahlua: XpressAudio on IRQ %d, DMA %d, %d\n",
		irq, dma8, dma16);
	
	hw_config = kzalloc(sizeof(struct address_info), GFP_KERNEL);
	if(hw_config == NULL)
	{
		printk(KERN_ERR "kahlua: out of memory.\n");
		return 1;
	}
	
	pci_set_drvdata(pdev, hw_config);
	
	hw_config->io_base = io;
	hw_config->irq = irq;
	hw_config->dma = dma8;
	hw_config->dma2 = dma16;
	hw_config->name = "Cyrix XpressAudio";
	hw_config->driver_use_1 = SB_NO_MIDI | SB_PCI_IRQ;

	if (!request_region(io, 16, "soundblaster"))
		goto err_out_free;
	
	if(sb_dsp_detect(hw_config, 0, 0, NULL)==0)
	{
		printk(KERN_ERR "kahlua: audio not responding.\n");
		release_region(io, 16);
		goto err_out_free;
	}

	oldquiet = sb_be_quiet;	
	sb_be_quiet = 1;
	if(sb_dsp_init(hw_config, THIS_MODULE))
	{
		sb_be_quiet = oldquiet;
		goto err_out_free;
	}
	sb_be_quiet = oldquiet;
	
	return 0;

err_out_free:
	kfree(hw_config);
	return 1;
}

static void remove_one(struct pci_dev *pdev)
{
	struct address_info *hw_config = pci_get_drvdata(pdev);
	sb_dsp_unload(hw_config, 0);
	kfree(hw_config);
}

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("Kahlua VSA1 PCI Audio");
MODULE_LICENSE("GPL");

/*
 *	5530 only. The 5510/5520 decode is different.
 */

static const struct pci_device_id id_tbl[] = {
	{ PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO), 0 },
	{ }
};

MODULE_DEVICE_TABLE(pci, id_tbl);

static struct pci_driver kahlua_driver = {
	.name		= "kahlua",
	.id_table	= id_tbl,
	.probe		= probe_one,
	.remove		= remove_one,
};


static int __init kahlua_init_module(void)
{
	printk(KERN_INFO "Cyrix Kahlua VSA1 XpressAudio support (c) Copyright 2003 Red Hat Inc\n");
	return pci_register_driver(&kahlua_driver);
}

static void kahlua_cleanup_module(void)
{
	pci_unregister_driver(&kahlua_driver);
}


module_init(kahlua_init_module);
module_exit(kahlua_cleanup_module);