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621887ae TI |
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@redhat.com> | |
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 | ||
621887ae TI |
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 | ||
46 | MODULE_AUTHOR("Ash Willis"); | |
47 | MODULE_DESCRIPTION("CS5530 Audio"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
50 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; | |
51 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; | |
52 | static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; | |
53 | ||
54 | struct snd_cs5530 { | |
55 | struct snd_card *card; | |
56 | struct pci_dev *pci; | |
57 | struct snd_sb *sb; | |
58 | unsigned long pci_base; | |
59 | }; | |
60 | ||
61 | static 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 | ||
67 | MODULE_DEVICE_TABLE(pci, snd_cs5530_ids); | |
68 | ||
69 | static 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 | ||
77 | static 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 | ||
83 | static 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 | ||
89 | static 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 | ||
98 | static 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 = ioremap_nocache(chip->pci_base, pci_resource_len(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 | ||
246 | static 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 | card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); | |
262 | ||
263 | if (card == NULL) | |
264 | return -ENOMEM; | |
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 | ||
286 | static 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 | ||
293 | static int __init alsa_card_cs5530_init(void) | |
294 | { | |
295 | return pci_register_driver(&driver); | |
296 | } | |
297 | ||
298 | static void __exit alsa_card_cs5530_exit(void) | |
299 | { | |
300 | pci_unregister_driver(&driver); | |
301 | } | |
302 | ||
303 | module_init(alsa_card_cs5530_init) | |
304 | module_exit(alsa_card_cs5530_exit) | |
305 |