source: GPL/trunk/alsa-kernel/pci/cs5530.c@ 598

Last change on this file since 598 was 598, checked in by David Azarewicz, 8 years ago

Merged/reintegrated v2 branch into trunk. Trunk is now v2
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 <linux/slab.h>
43#include <sound/core.h>
44#include <sound/sb.h>
45#include <sound/initval.h>
46
47MODULE_AUTHOR("Ash Willis");
48MODULE_DESCRIPTION("CS5530 Audio");
49MODULE_LICENSE("GPL");
50
51static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
52static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
53static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
54
55struct snd_cs5530 {
56 struct snd_card *card;
57 struct pci_dev *pci;
58 struct snd_sb *sb;
59 unsigned long pci_base;
60};
61
62static DEFINE_PCI_DEVICE_TABLE(snd_cs5530_ids) = {
63 {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
64 PCI_ANY_ID, 0, 0},
65 {0,}
66};
67
68MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
69
70static int snd_cs5530_free(struct snd_cs5530 *chip)
71{
72 pci_release_regions(chip->pci);
73 pci_disable_device(chip->pci);
74 kfree(chip);
75 return 0;
76}
77
78static int snd_cs5530_dev_free(struct snd_device *device)
79{
80 struct snd_cs5530 *chip = device->device_data;
81 return snd_cs5530_free(chip);
82}
83
84static void __devexit snd_cs5530_remove(struct pci_dev *pci)
85{
86 snd_card_free(pci_get_drvdata(pci));
87 pci_set_drvdata(pci, NULL);
88}
89
90static u8 __devinit snd_cs5530_mixer_read(unsigned long io, u8 reg)
91{
92 outb(reg, io + 4);
93 udelay(20);
94 reg = inb(io + 5);
95 udelay(20);
96 return reg;
97}
98
99static int __devinit snd_cs5530_create(struct snd_card *card,
100 struct pci_dev *pci,
101 struct snd_cs5530 **rchip)
102{
103 struct snd_cs5530 *chip;
104 unsigned long sb_base;
105 u8 irq, dma8, dma16 = 0;
106 u16 map;
107 void __iomem *mem;
108 int err;
109
110 static struct snd_device_ops ops = {
111 .dev_free = snd_cs5530_dev_free,
112 };
113 *rchip = NULL;
114
115 err = pci_enable_device(pci);
116 if (err < 0)
117 return err;
118
119 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
120 if (chip == NULL) {
121 pci_disable_device(pci);
122 return -ENOMEM;
123 }
124
125 chip->card = card;
126 chip->pci = pci;
127
128 err = pci_request_regions(pci, "CS5530");
129 if (err < 0) {
130 kfree(chip);
131 pci_disable_device(pci);
132 return err;
133 }
134 chip->pci_base = pci_resource_start(pci, 0);
135
136 mem = pci_ioremap_bar(pci, 0);
137 if (mem == NULL) {
138 kfree(chip);
139 pci_disable_device(pci);
140 return -EBUSY;
141 }
142
143 map = readw(mem + 0x18);
144 iounmap(mem);
145
146 /* Map bits
147 0:1 * 0x20 + 0x200 = sb base
148 2 sb enable
149 3 adlib enable
150 5 MPU enable 0x330
151 6 MPU enable 0x300
152
153 The other bits may be used internally so must be masked */
154
155 sb_base = 0x220 + 0x20 * (map & 3);
156
157 if (map & (1<<2))
158 printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
159 else {
160 printk(KERN_ERR "Could not find XpressAudio!\n");
161 snd_cs5530_free(chip);
162 return -ENODEV;
163 }
164
165 if (map & (1<<5))
166 printk(KERN_INFO "CS5530: MPU at 0x300\n");
167 else if (map & (1<<6))
168 printk(KERN_INFO "CS5530: MPU at 0x330\n");
169
170 irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
171 dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
172
173 if (dma8 & 0x20)
174 dma16 = 5;
175 else if (dma8 & 0x40)
176 dma16 = 6;
177 else if (dma8 & 0x80)
178 dma16 = 7;
179 else {
180 printk(KERN_ERR "CS5530: No 16bit DMA enabled\n");
181 snd_cs5530_free(chip);
182 return -ENODEV;
183 }
184
185 if (dma8 & 0x01)
186 dma8 = 0;
187 else if (dma8 & 02)
188 dma8 = 1;
189 else if (dma8 & 0x08)
190 dma8 = 3;
191 else {
192 printk(KERN_ERR "CS5530: No 8bit DMA enabled\n");
193 snd_cs5530_free(chip);
194 return -ENODEV;
195 }
196
197 if (irq & 1)
198 irq = 9;
199 else if (irq & 2)
200 irq = 5;
201 else if (irq & 4)
202 irq = 7;
203 else if (irq & 8)
204 irq = 10;
205 else {
206 printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n");
207 snd_cs5530_free(chip);
208 return -ENODEV;
209 }
210
211 printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8,
212 dma16);
213
214 err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
215 dma16, SB_HW_CS5530, &chip->sb);
216 if (err < 0) {
217 printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
218 snd_cs5530_free(chip);
219 return err;
220 }
221
222 err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
223 if (err < 0) {
224 printk(KERN_ERR "CS5530: Could not create PCM\n");
225 snd_cs5530_free(chip);
226 return err;
227 }
228
229 err = snd_sbmixer_new(chip->sb);
230 if (err < 0) {
231 printk(KERN_ERR "CS5530: Could not create Mixer\n");
232 snd_cs5530_free(chip);
233 return err;
234 }
235
236 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
237 if (err < 0) {
238 snd_cs5530_free(chip);
239 return err;
240 }
241
242 snd_card_set_dev(card, &pci->dev);
243 *rchip = chip;
244 return 0;
245}
246
247static int __devinit snd_cs5530_probe(struct pci_dev *pci,
248 const struct pci_device_id *pci_id)
249{
250 static int dev;
251 struct snd_card *card;
252 struct snd_cs5530 *chip = NULL;
253 int err;
254
255 if (dev >= SNDRV_CARDS)
256 return -ENODEV;
257 if (!enable[dev]) {
258 dev++;
259 return -ENOENT;
260 }
261
262 err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
263
264 if (err < 0)
265 return err;
266
267 err = snd_cs5530_create(card, pci, &chip);
268 if (err < 0) {
269 snd_card_free(card);
270 return err;
271 }
272
273 strcpy(card->driver, "CS5530");
274 strcpy(card->shortname, "CS5530 Audio");
275 sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
276
277 err = snd_card_register(card);
278 if (err < 0) {
279 snd_card_free(card);
280 return err;
281 }
282 pci_set_drvdata(pci, card);
283 dev++;
284 return 0;
285}
286
287static struct pci_driver driver = {
288 .name = "CS5530_Audio",
289 .id_table = snd_cs5530_ids,
290 .probe = snd_cs5530_probe,
291 .remove = __devexit_p(snd_cs5530_remove),
292};
293
294static int __init alsa_card_cs5530_init(void)
295{
296 return pci_register_driver(&driver);
297}
298
299static void __exit alsa_card_cs5530_exit(void)
300{
301 pci_unregister_driver(&driver);
302}
303
304module_init(alsa_card_cs5530_init)
305module_exit(alsa_card_cs5530_exit)
306
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