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