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 #include <linux/delay.h>
31 #include <linux/module.h>
32 #include <linux/pci.h>
33 #include <linux/slab.h>
34 #include <sound/core.h>
35 #include <sound/sb.h>
36 #include <sound/initval.h>
37
38 MODULE_AUTHOR("Ash Willis");
39 MODULE_DESCRIPTION("CS5530 Audio");
40 MODULE_LICENSE("GPL");
41
42 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
43 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
44 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
45
46 module_param_array(index, int, NULL, 0444);
47 MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
48 module_param_array(id, charp, NULL, 0444);
49 MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
50 module_param_array(enable, bool, NULL, 0444);
51 MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");
52
53 struct snd_cs5530 {
54 struct snd_card *card;
55 struct pci_dev *pci;
56 struct snd_sb *sb;
57 unsigned long pci_base;
58 };
59
60 static const struct pci_device_id snd_cs5530_ids[] = {
61 {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
62 PCI_ANY_ID, 0, 0},
63 {0,}
64 };
65
66 MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
67
snd_cs5530_mixer_read(unsigned long io,u8 reg)68 static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
69 {
70 outb(reg, io + 4);
71 udelay(20);
72 reg = inb(io + 5);
73 udelay(20);
74 return reg;
75 }
76
snd_cs5530_create(struct snd_card * card,struct pci_dev * pci)77 static int snd_cs5530_create(struct snd_card *card,
78 struct pci_dev *pci)
79 {
80 struct snd_cs5530 *chip = card->private_data;
81 unsigned long sb_base;
82 u8 irq, dma8, dma16 = 0;
83 u16 map;
84 void __iomem *mem;
85 int err;
86
87 err = pcim_enable_device(pci);
88 if (err < 0)
89 return err;
90
91 chip->card = card;
92 chip->pci = pci;
93
94 err = pcim_iomap_regions(pci, 1 << 0, "CS5530");
95 if (err < 0)
96 return err;
97 chip->pci_base = pci_resource_start(pci, 0);
98 mem = pcim_iomap_table(pci)[0];
99 map = readw(mem + 0x18);
100
101 /* Map bits
102 0:1 * 0x20 + 0x200 = sb base
103 2 sb enable
104 3 adlib enable
105 5 MPU enable 0x330
106 6 MPU enable 0x300
107
108 The other bits may be used internally so must be masked */
109
110 sb_base = 0x220 + 0x20 * (map & 3);
111
112 if (map & (1<<2))
113 dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
114 else {
115 dev_err(card->dev, "Could not find XpressAudio!\n");
116 return -ENODEV;
117 }
118
119 if (map & (1<<5))
120 dev_info(card->dev, "MPU at 0x300\n");
121 else if (map & (1<<6))
122 dev_info(card->dev, "MPU at 0x330\n");
123
124 irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
125 dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
126
127 if (dma8 & 0x20)
128 dma16 = 5;
129 else if (dma8 & 0x40)
130 dma16 = 6;
131 else if (dma8 & 0x80)
132 dma16 = 7;
133 else {
134 dev_err(card->dev, "No 16bit DMA enabled\n");
135 return -ENODEV;
136 }
137
138 if (dma8 & 0x01)
139 dma8 = 0;
140 else if (dma8 & 02)
141 dma8 = 1;
142 else if (dma8 & 0x08)
143 dma8 = 3;
144 else {
145 dev_err(card->dev, "No 8bit DMA enabled\n");
146 return -ENODEV;
147 }
148
149 if (irq & 1)
150 irq = 9;
151 else if (irq & 2)
152 irq = 5;
153 else if (irq & 4)
154 irq = 7;
155 else if (irq & 8)
156 irq = 10;
157 else {
158 dev_err(card->dev, "SoundBlaster IRQ not set\n");
159 return -ENODEV;
160 }
161
162 dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16);
163
164 err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
165 dma16, SB_HW_CS5530, &chip->sb);
166 if (err < 0) {
167 dev_err(card->dev, "Could not create SoundBlaster\n");
168 return err;
169 }
170
171 err = snd_sb16dsp_pcm(chip->sb, 0);
172 if (err < 0) {
173 dev_err(card->dev, "Could not create PCM\n");
174 return err;
175 }
176
177 err = snd_sbmixer_new(chip->sb);
178 if (err < 0) {
179 dev_err(card->dev, "Could not create Mixer\n");
180 return err;
181 }
182
183 return 0;
184 }
185
snd_cs5530_probe(struct pci_dev * pci,const struct pci_device_id * pci_id)186 static int snd_cs5530_probe(struct pci_dev *pci,
187 const struct pci_device_id *pci_id)
188 {
189 static int dev;
190 struct snd_card *card;
191 struct snd_cs5530 *chip;
192 int err;
193
194 if (dev >= SNDRV_CARDS)
195 return -ENODEV;
196 if (!enable[dev]) {
197 dev++;
198 return -ENOENT;
199 }
200
201 err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
202 sizeof(*chip), &card);
203 if (err < 0)
204 return err;
205 chip = card->private_data;
206
207 err = snd_cs5530_create(card, pci);
208 if (err < 0)
209 return err;
210
211 strcpy(card->driver, "CS5530");
212 strcpy(card->shortname, "CS5530 Audio");
213 sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
214
215 err = snd_card_register(card);
216 if (err < 0)
217 return err;
218 pci_set_drvdata(pci, card);
219 dev++;
220 return 0;
221 }
222
223 static struct pci_driver cs5530_driver = {
224 .name = KBUILD_MODNAME,
225 .id_table = snd_cs5530_ids,
226 .probe = snd_cs5530_probe,
227 };
228
229 module_pci_driver(cs5530_driver);
230