Home Home > GIT Browse
summaryrefslogtreecommitdiff
blob: c6b82c85e044b9eec35e212f2dc487452651430e (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
294
295
296
297
298
299
/*
 * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
 *
 * 	(C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
 *	(C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
 *
 * This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did
 * mess with it a bit. The chip seems to have to have trouble with full duplex
 * mode. If we're recording in 8bit 8000kHz, say, and we then attempt to
 * simultaneously play back audio at 16bit 44100kHz, the device actually plays
 * back in the same format in which it is capturing. By forcing the chip to
 * always play/capture in 16/44100, we can let alsa-lib convert the samples and
 * that way we can hack up some full duplex audio. 
 * 
 * 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/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/sb.h>
#include <sound/initval.h>

MODULE_AUTHOR("Ash Willis");
MODULE_DESCRIPTION("CS5530 Audio");
MODULE_LICENSE("GPL");

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");

struct snd_cs5530 {
	struct snd_card *card;
	struct pci_dev *pci;
	struct snd_sb *sb;
	unsigned long pci_base;
};

static DEFINE_PCI_DEVICE_TABLE(snd_cs5530_ids) = {
	{PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
							PCI_ANY_ID, 0, 0},
	{0,}
};

MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);

static int snd_cs5530_free(struct snd_cs5530 *chip)
{
	pci_release_regions(chip->pci);
	pci_disable_device(chip->pci);
	kfree(chip);
	return 0;
}

static int snd_cs5530_dev_free(struct snd_device *device)
{
	struct snd_cs5530 *chip = device->device_data;
	return snd_cs5530_free(chip);
}

static void snd_cs5530_remove(struct pci_dev *pci)
{
	snd_card_free(pci_get_drvdata(pci));
}

static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
{
	outb(reg, io + 4);
	udelay(20);
	reg = inb(io + 5);
	udelay(20);
	return reg;
}

static int snd_cs5530_create(struct snd_card *card,
			     struct pci_dev *pci,
			     struct snd_cs5530 **rchip)
{
	struct snd_cs5530 *chip;
	unsigned long sb_base;
	u8 irq, dma8, dma16 = 0;
	u16 map;
	void __iomem *mem;
	int err;

	static struct snd_device_ops ops = {
		.dev_free = snd_cs5530_dev_free,
	};
	*rchip = NULL;

	err = pci_enable_device(pci);
 	if (err < 0)
		return err;

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (chip == NULL) {
		pci_disable_device(pci);
		return -ENOMEM;
	}

	chip->card = card;
	chip->pci = pci;

	err = pci_request_regions(pci, "CS5530");
	if (err < 0) {
		kfree(chip); 
		pci_disable_device(pci);
		return err;
	}
	chip->pci_base = pci_resource_start(pci, 0);

	mem = pci_ioremap_bar(pci, 0);
	if (mem == NULL) {
		snd_cs5530_free(chip);
		return -EBUSY;
	}

	map = readw(mem + 0x18);
	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 */

	sb_base = 0x220 + 0x20 * (map & 3);

	if (map & (1<<2))
		printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
	else {
		printk(KERN_ERR "Could not find XpressAudio!\n");
		snd_cs5530_free(chip);
		return -ENODEV;
	}

	if (map & (1<<5))
		printk(KERN_INFO "CS5530: MPU at 0x300\n");
	else if (map & (1<<6))
		printk(KERN_INFO "CS5530: MPU at 0x330\n");

	irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
	dma8 = snd_cs5530_mixer_read(sb_base, 0x81);

	if (dma8 & 0x20)
		dma16 = 5;
	else if (dma8 & 0x40)
		dma16 = 6;
	else if (dma8 & 0x80)
		dma16 = 7;
	else {
		printk(KERN_ERR "CS5530: No 16bit DMA enabled\n");
		snd_cs5530_free(chip);
		return -ENODEV;
	}

	if (dma8 & 0x01)
		dma8 = 0;
	else if (dma8 & 02)
		dma8 = 1;
	else if (dma8 & 0x08)
		dma8 = 3;
	else {
		printk(KERN_ERR "CS5530: No 8bit DMA enabled\n");
		snd_cs5530_free(chip);
		return -ENODEV;
	}

	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 "CS5530: SoundBlaster IRQ not set\n");
		snd_cs5530_free(chip);
		return -ENODEV;
	}

	printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, 
									dma16);

	err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
						dma16, SB_HW_CS5530, &chip->sb);
	if (err < 0) {
		printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
		snd_cs5530_free(chip);
		return err;
	}

	err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
	if (err < 0) {
		printk(KERN_ERR "CS5530: Could not create PCM\n");
		snd_cs5530_free(chip);
		return err;
	}

	err = snd_sbmixer_new(chip->sb);
	if (err < 0) {
		printk(KERN_ERR "CS5530: Could not create Mixer\n");
		snd_cs5530_free(chip);
		return err;
	}

	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
	if (err < 0) {
		snd_cs5530_free(chip);
		return err;
	}

	snd_card_set_dev(card, &pci->dev);
	*rchip = chip;
	return 0;
}

static int snd_cs5530_probe(struct pci_dev *pci,
			    const struct pci_device_id *pci_id)
{
	static int dev;
	struct snd_card *card;
	struct snd_cs5530 *chip = NULL;
	int err;

	if (dev >= SNDRV_CARDS)
		return -ENODEV;
	if (!enable[dev]) {
		dev++;
		return -ENOENT;
	}

	err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);

	if (err < 0)
		return err;

	err = snd_cs5530_create(card, pci, &chip);
	if (err < 0) {
		snd_card_free(card);
		return err;
	}

	strcpy(card->driver, "CS5530");
	strcpy(card->shortname, "CS5530 Audio");
	sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);

	err = snd_card_register(card);
	if (err < 0) {
		snd_card_free(card);
		return err;
	}
	pci_set_drvdata(pci, card);
	dev++;
	return 0;
}

static struct pci_driver cs5530_driver = {
	.name = KBUILD_MODNAME,
	.id_table = snd_cs5530_ids,
	.probe = snd_cs5530_probe,
	.remove = snd_cs5530_remove,
};

module_pci_driver(cs5530_driver);