source: GPL/trunk/alsa-kernel/pci/cs5530.c@ 752

Last change on this file since 752 was 717, checked in by David Azarewicz, 3 years ago

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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 u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
73{
74 outb(reg, io + 4);
75 udelay(20);
76 reg = inb(io + 5);
77 udelay(20);
78 return reg;
79}
80
81static int snd_cs5530_create(struct snd_card *card,
82 struct pci_dev *pci)
83{
84 struct snd_cs5530 *chip = card->private_data;
85 unsigned long sb_base;
86 u8 irq, dma8, dma16 = 0;
87 u16 map;
88 void __iomem *mem;
89 int err;
90
91 err = pcim_enable_device(pci);
92 if (err < 0)
93 return err;
94
95 chip->card = card;
96 chip->pci = pci;
97
98 err = pcim_iomap_regions(pci, 1 << 0, "CS5530");
99 if (err < 0)
100 return err;
101 chip->pci_base = pci_resource_start(pci, 0);
102#ifndef TARGET_OS2
103 mem = pcim_iomap_table(pci)[0];
104#else
105 mem = pci_ioremap_bar(pci, 0);
106#endif
107 map = readw(mem + 0x18);
108
109 /* Map bits
110 0:1 * 0x20 + 0x200 = sb base
111 2 sb enable
112 3 adlib enable
113 5 MPU enable 0x330
114 6 MPU enable 0x300
115
116 The other bits may be used internally so must be masked */
117
118 sb_base = 0x220 + 0x20 * (map & 3);
119
120 if (map & (1<<2))
121 dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
122 else {
123 dev_err(card->dev, "Could not find XpressAudio!\n");
124 return -ENODEV;
125 }
126
127 if (map & (1<<5))
128 dev_info(card->dev, "MPU at 0x300\n");
129 else if (map & (1<<6))
130 dev_info(card->dev, "MPU at 0x330\n");
131
132 irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
133 dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
134
135 if (dma8 & 0x20)
136 dma16 = 5;
137 else if (dma8 & 0x40)
138 dma16 = 6;
139 else if (dma8 & 0x80)
140 dma16 = 7;
141 else {
142 dev_err(card->dev, "No 16bit DMA enabled\n");
143 return -ENODEV;
144 }
145
146 if (dma8 & 0x01)
147 dma8 = 0;
148 else if (dma8 & 02)
149 dma8 = 1;
150 else if (dma8 & 0x08)
151 dma8 = 3;
152 else {
153 dev_err(card->dev, "No 8bit DMA enabled\n");
154 return -ENODEV;
155 }
156
157 if (irq & 1)
158 irq = 9;
159 else if (irq & 2)
160 irq = 5;
161 else if (irq & 4)
162 irq = 7;
163 else if (irq & 8)
164 irq = 10;
165 else {
166 dev_err(card->dev, "SoundBlaster IRQ not set\n");
167 return -ENODEV;
168 }
169
170 dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16);
171
172 err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
173 dma16, SB_HW_CS5530, &chip->sb);
174 if (err < 0) {
175 dev_err(card->dev, "Could not create SoundBlaster\n");
176 return err;
177 }
178
179 err = snd_sb16dsp_pcm(chip->sb, 0);
180 if (err < 0) {
181 dev_err(card->dev, "Could not create PCM\n");
182 return err;
183 }
184
185 err = snd_sbmixer_new(chip->sb);
186 if (err < 0) {
187 dev_err(card->dev, "Could not create Mixer\n");
188 return err;
189 }
190
191 return 0;
192}
193
194static int snd_cs5530_probe(struct pci_dev *pci,
195 const struct pci_device_id *pci_id)
196{
197 static int dev;
198 struct snd_card *card;
199 struct snd_cs5530 *chip;
200 int err;
201
202 if (dev >= SNDRV_CARDS)
203 return -ENODEV;
204 if (!enable[dev]) {
205 dev++;
206 return -ENOENT;
207 }
208
209 err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
210 sizeof(*chip), &card);
211 if (err < 0)
212 return err;
213 chip = card->private_data;
214
215 err = snd_cs5530_create(card, pci);
216 if (err < 0)
217 return err;
218
219 strcpy(card->driver, "CS5530");
220 strcpy(card->shortname, "CS5530 Audio");
221 sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
222
223 err = snd_card_register(card);
224 if (err < 0)
225 return err;
226 pci_set_drvdata(pci, card);
227 dev++;
228 return 0;
229}
230
231static struct pci_driver cs5530_driver = {
232 .name = KBUILD_MODNAME,
233 .id_table = snd_cs5530_ids,
234 .probe = snd_cs5530_probe,
235};
236
237module_pci_driver(cs5530_driver);
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