source: GPL/trunk/alsa-kernel/pci/cs5530.c@ 455

Last change on this file since 455 was 455, checked in by Paul Smedley, 16 years ago

Add support for CS553x audio cards (untested)
File size: 7.1 KB
Line 
1/*
2 * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
3 *
4 * (C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
5 * (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
6 *
7 * This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did
8 * mess with it a bit. The chip seems to have to have trouble with full duplex
9 * mode. If we're recording in 8bit 8000kHz, say, and we then attempt to
10 * simultaneously play back audio at 16bit 44100kHz, the device actually plays
11 * back in the same format in which it is capturing. By forcing the chip to
12 * always play/capture in 16/44100, we can let alsa-lib convert the samples and
13 * that way we can hack up some full duplex audio.
14 *
15 * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
16 * The older version (VSA1) provides fairly good soundblaster emulation
17 * although there are a couple of bugs: large DMA buffers break record,
18 * and the MPU event handling seems suspect. VSA2 allows the native driver
19 * to control the AC97 audio engine directly and requires a different driver.
20 *
21 * Thanks to National Semiconductor for providing the needed information
22 * on the XpressAudio(tm) internals.
23 *
24 * This program is free software; you can redistribute it and/or modify it
25 * under the terms of the GNU General Public License as published by the
26 * Free Software Foundation; either version 2, or (at your option) any
27 * later version.
28 *
29 * This program is distributed in the hope that it will be useful, but
30 * WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
32 * General Public License for more details.
33 *
34 * TO DO:
35 * Investigate whether we can portably support Cognac (5520) in the
36 * same manner.
37 */
38
39#include <linux/delay.h>
40#include <linux/moduleparam.h>
41#include <linux/pci.h>
42#include <sound/core.h>
43#include <sound/sb.h>
44#include <sound/initval.h>
45
46MODULE_AUTHOR("Ash Willis");
47MODULE_DESCRIPTION("CS5530 Audio");
48MODULE_LICENSE("GPL");
49
50static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
51static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
52static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
53
54struct snd_cs5530 {
55 struct snd_card *card;
56 struct pci_dev *pci;
57 struct snd_sb *sb;
58 unsigned long pci_base;
59};
60
61static struct pci_device_id snd_cs5530_ids[] = {
62 {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
63 PCI_ANY_ID, 0, 0},
64 {0,}
65};
66
67MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
68
69static int snd_cs5530_free(struct snd_cs5530 *chip)
70{
71 pci_release_regions(chip->pci);
72 pci_disable_device(chip->pci);
73 kfree(chip);
74 return 0;
75}
76
77static int snd_cs5530_dev_free(struct snd_device *device)
78{
79 struct snd_cs5530 *chip = device->device_data;
80 return snd_cs5530_free(chip);
81}
82
83static void __devexit snd_cs5530_remove(struct pci_dev *pci)
84{
85 snd_card_free(pci_get_drvdata(pci));
86 pci_set_drvdata(pci, NULL);
87}
88
89static u8 __devinit snd_cs5530_mixer_read(unsigned long io, u8 reg)
90{
91 outb(reg, io + 4);
92 udelay(20);
93 reg = inb(io + 5);
94 udelay(20);
95 return reg;
96}
97
98static int __devinit snd_cs5530_create(struct snd_card *card,
99 struct pci_dev *pci,
100 struct snd_cs5530 **rchip)
101{
102 struct snd_cs5530 *chip;
103 unsigned long sb_base;
104 u8 irq, dma8, dma16 = 0;
105 u16 map;
106 void __iomem *mem;
107 int err;
108
109 static struct snd_device_ops ops = {
110 .dev_free = snd_cs5530_dev_free,
111 };
112 *rchip = NULL;
113
114 err = pci_enable_device(pci);
115 if (err < 0)
116 return err;
117
118 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
119 if (chip == NULL) {
120 pci_disable_device(pci);
121 return -ENOMEM;
122 }
123
124 chip->card = card;
125 chip->pci = pci;
126
127 err = pci_request_regions(pci, "CS5530");
128 if (err < 0) {
129 kfree(chip);
130 pci_disable_device(pci);
131 return err;
132 }
133 chip->pci_base = pci_resource_start(pci, 0);
134
135 mem = pci_ioremap_bar(pci, 0);
136 if (mem == NULL) {
137 kfree(chip);
138 pci_disable_device(pci);
139 return -EBUSY;
140 }
141
142 map = readw(mem + 0x18);
143 iounmap(mem);
144
145 /* Map bits
146 0:1 * 0x20 + 0x200 = sb base
147 2 sb enable
148 3 adlib enable
149 5 MPU enable 0x330
150 6 MPU enable 0x300
151
152 The other bits may be used internally so must be masked */
153
154 sb_base = 0x220 + 0x20 * (map & 3);
155
156 if (map & (1<<2))
157 printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
158 else {
159 printk(KERN_ERR "Could not find XpressAudio!\n");
160 snd_cs5530_free(chip);
161 return -ENODEV;
162 }
163
164 if (map & (1<<5))
165 printk(KERN_INFO "CS5530: MPU at 0x300\n");
166 else if (map & (1<<6))
167 printk(KERN_INFO "CS5530: MPU at 0x330\n");
168
169 irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
170 dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
171
172 if (dma8 & 0x20)
173 dma16 = 5;
174 else if (dma8 & 0x40)
175 dma16 = 6;
176 else if (dma8 & 0x80)
177 dma16 = 7;
178 else {
179 printk(KERN_ERR "CS5530: No 16bit DMA enabled\n");
180 snd_cs5530_free(chip);
181 return -ENODEV;
182 }
183
184 if (dma8 & 0x01)
185 dma8 = 0;
186 else if (dma8 & 02)
187 dma8 = 1;
188 else if (dma8 & 0x08)
189 dma8 = 3;
190 else {
191 printk(KERN_ERR "CS5530: No 8bit DMA enabled\n");
192 snd_cs5530_free(chip);
193 return -ENODEV;
194 }
195
196 if (irq & 1)
197 irq = 9;
198 else if (irq & 2)
199 irq = 5;
200 else if (irq & 4)
201 irq = 7;
202 else if (irq & 8)
203 irq = 10;
204 else {
205 printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n");
206 snd_cs5530_free(chip);
207 return -ENODEV;
208 }
209
210 printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8,
211 dma16);
212
213 err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
214 dma16, SB_HW_CS5530, &chip->sb);
215 if (err < 0) {
216 printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
217 snd_cs5530_free(chip);
218 return err;
219 }
220
221 err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
222 if (err < 0) {
223 printk(KERN_ERR "CS5530: Could not create PCM\n");
224 snd_cs5530_free(chip);
225 return err;
226 }
227
228 err = snd_sbmixer_new(chip->sb);
229 if (err < 0) {
230 printk(KERN_ERR "CS5530: Could not create Mixer\n");
231 snd_cs5530_free(chip);
232 return err;
233 }
234
235 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
236 if (err < 0) {
237 snd_cs5530_free(chip);
238 return err;
239 }
240
241 snd_card_set_dev(card, &pci->dev);
242 *rchip = chip;
243 return 0;
244}
245
246static int __devinit snd_cs5530_probe(struct pci_dev *pci,
247 const struct pci_device_id *pci_id)
248{
249 static int dev;
250 struct snd_card *card;
251 struct snd_cs5530 *chip = NULL;
252 int err;
253
254 if (dev >= SNDRV_CARDS)
255 return -ENODEV;
256 if (!enable[dev]) {
257 dev++;
258 return -ENOENT;
259 }
260
261 err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
262
263 if (err < 0)
264 return err;
265
266 err = snd_cs5530_create(card, pci, &chip);
267 if (err < 0) {
268 snd_card_free(card);
269 return err;
270 }
271
272 strcpy(card->driver, "CS5530");
273 strcpy(card->shortname, "CS5530 Audio");
274 sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
275
276 err = snd_card_register(card);
277 if (err < 0) {
278 snd_card_free(card);
279 return err;
280 }
281 pci_set_drvdata(pci, card);
282 dev++;
283 return 0;
284}
285
286static struct pci_driver driver = {
287 .name = "CS5530_Audio",
288 .id_table = snd_cs5530_ids,
289 .probe = snd_cs5530_probe,
290 .remove = __devexit_p(snd_cs5530_remove),
291};
292
293static int __init alsa_card_cs5530_init(void)
294{
295 return pci_register_driver(&driver);
296}
297
298static void __exit alsa_card_cs5530_exit(void)
299{
300 pci_unregister_driver(&driver);
301}
302
303module_init(alsa_card_cs5530_init)
304module_exit(alsa_card_cs5530_exit)
305
Note: See TracBrowser for help on using the repository browser.