source: GPL/trunk/alsa-kernel/pci/cs5530.c@ 689

Last change on this file since 689 was 679, checked in by David Azarewicz, 5 years ago

Merge changes from Paul's uniaud32next branch.
File size: 6.9 KB
Line 
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
4 *
5 * (C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
6 * (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
7 *
8 * This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did
9 * mess with it a bit. The chip seems to have to have trouble with full duplex
10 * mode. If we're recording in 8bit 8000kHz, say, and we then attempt to
11 * simultaneously play back audio at 16bit 44100kHz, the device actually plays
12 * back in the same format in which it is capturing. By forcing the chip to
13 * always play/capture in 16/44100, we can let alsa-lib convert the samples and
14 * that way we can hack up some full duplex audio.
15 *
16 * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
17 * The older version (VSA1) provides fairly good soundblaster emulation
18 * although there are a couple of bugs: large DMA buffers break record,
19 * and the MPU event handling seems suspect. VSA2 allows the native driver
20 * to control the AC97 audio engine directly and requires a different driver.
21 *
22 * Thanks to National Semiconductor for providing the needed information
23 * on the XpressAudio(tm) internals.
24 *
25 * TO DO:
26 * Investigate whether we can portably support Cognac (5520) in the
27 * same manner.
28 */
29
30#ifdef TARGET_OS2
31#define KBUILD_MODNAME "cs5530"
32#endif
33
34#include <linux/delay.h>
35#include <linux/module.h>
36#include <linux/pci.h>
37#include <linux/slab.h>
38#include <sound/core.h>
39#include <sound/sb.h>
40#include <sound/initval.h>
41
42MODULE_AUTHOR("Ash Willis");
43MODULE_DESCRIPTION("CS5530 Audio");
44MODULE_LICENSE("GPL");
45
46static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
47static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
48static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
49
50module_param_array(index, int, NULL, 0444);
51MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
52module_param_array(id, charp, NULL, 0444);
53MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
54module_param_array(enable, bool, NULL, 0444);
55MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");
56
57struct snd_cs5530 {
58 struct snd_card *card;
59 struct pci_dev *pci;
60 struct snd_sb *sb;
61 unsigned long pci_base;
62};
63
64static const struct pci_device_id snd_cs5530_ids[] = {
65 {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
66 PCI_ANY_ID, 0, 0},
67 {0,}
68};
69
70MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
71
72static int snd_cs5530_free(struct snd_cs5530 *chip)
73{
74 pci_release_regions(chip->pci);
75 pci_disable_device(chip->pci);
76 kfree(chip);
77 return 0;
78}
79
80static int snd_cs5530_dev_free(struct snd_device *device)
81{
82 struct snd_cs5530 *chip = device->device_data;
83 return snd_cs5530_free(chip);
84}
85
86static void snd_cs5530_remove(struct pci_dev *pci)
87{
88 snd_card_free(pci_get_drvdata(pci));
89}
90
91static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
92{
93 outb(reg, io + 4);
94 udelay(20);
95 reg = inb(io + 5);
96 udelay(20);
97 return reg;
98}
99
100static int snd_cs5530_create(struct snd_card *card,
101 struct pci_dev *pci,
102 struct snd_cs5530 **rchip)
103{
104 struct snd_cs5530 *chip;
105 unsigned long sb_base;
106 u8 irq, dma8, dma16 = 0;
107 u16 map;
108 void __iomem *mem;
109 int err;
110
111 static const struct snd_device_ops ops = {
112 .dev_free = snd_cs5530_dev_free,
113 };
114 *rchip = NULL;
115
116 err = pci_enable_device(pci);
117 if (err < 0)
118 return err;
119
120 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
121 if (chip == NULL) {
122 pci_disable_device(pci);
123 return -ENOMEM;
124 }
125
126 chip->card = card;
127 chip->pci = pci;
128
129 err = pci_request_regions(pci, "CS5530");
130 if (err < 0) {
131 kfree(chip);
132 pci_disable_device(pci);
133 return err;
134 }
135 chip->pci_base = pci_resource_start(pci, 0);
136
137 mem = pci_ioremap_bar(pci, 0);
138 if (mem == NULL) {
139 snd_cs5530_free(chip);
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 dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
159 else {
160 dev_err(card->dev, "Could not find XpressAudio!\n");
161 snd_cs5530_free(chip);
162 return -ENODEV;
163 }
164
165 if (map & (1<<5))
166 dev_info(card->dev, "MPU at 0x300\n");
167 else if (map & (1<<6))
168 dev_info(card->dev, "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 dev_err(card->dev, "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 dev_err(card->dev, "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 dev_err(card->dev, "SoundBlaster IRQ not set\n");
207 snd_cs5530_free(chip);
208 return -ENODEV;
209 }
210
211 dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, 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 dev_err(card->dev, "Could not create SoundBlaster\n");
217 snd_cs5530_free(chip);
218 return err;
219 }
220
221 err = snd_sb16dsp_pcm(chip->sb, 0);
222 if (err < 0) {
223 dev_err(card->dev, "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 dev_err(card->dev, "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 *rchip = chip;
242 return 0;
243}
244
245static int snd_cs5530_probe(struct pci_dev *pci,
246 const struct pci_device_id *pci_id)
247{
248 static int dev;
249 struct snd_card *card;
250 struct snd_cs5530 *chip = NULL;
251 int err;
252
253 if (dev >= SNDRV_CARDS)
254 return -ENODEV;
255 if (!enable[dev]) {
256 dev++;
257 return -ENOENT;
258 }
259
260 err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
261 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 cs5530_driver = {
287 .name = KBUILD_MODNAME,
288 .id_table = snd_cs5530_ids,
289 .probe = snd_cs5530_probe,
290 .remove = snd_cs5530_remove,
291};
292
293module_pci_driver(cs5530_driver);
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