2 * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
4 * (C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
5 * (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
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.
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.
21 * Thanks to National Semiconductor for providing the needed information
22 * on the XpressAudio(tm) internals.
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
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.
35 * Investigate whether we can portably support Cognac (5520) in the
39 #include <linux/delay.h>
40 #include <linux/module.h>
41 #include <linux/pci.h>
42 #include <linux/slab.h>
43 #include <sound/core.h>
45 #include <sound/initval.h>
47 MODULE_AUTHOR("Ash Willis");
48 MODULE_DESCRIPTION("CS5530 Audio");
49 MODULE_LICENSE("GPL");
51 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
52 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
53 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
55 module_param_array(index, int, NULL, 0444);
56 MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
57 module_param_array(id, charp, NULL, 0444);
58 MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
59 module_param_array(enable, bool, NULL, 0444);
60 MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");
63 struct snd_card *card;
66 unsigned long pci_base;
69 static DEFINE_PCI_DEVICE_TABLE(snd_cs5530_ids) = {
70 {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
75 MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
77 static int snd_cs5530_free(struct snd_cs5530 *chip)
79 pci_release_regions(chip->pci);
80 pci_disable_device(chip->pci);
85 static int snd_cs5530_dev_free(struct snd_device *device)
87 struct snd_cs5530 *chip = device->device_data;
88 return snd_cs5530_free(chip);
91 static void snd_cs5530_remove(struct pci_dev *pci)
93 snd_card_free(pci_get_drvdata(pci));
96 static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
105 static int snd_cs5530_create(struct snd_card *card,
107 struct snd_cs5530 **rchip)
109 struct snd_cs5530 *chip;
110 unsigned long sb_base;
111 u8 irq, dma8, dma16 = 0;
116 static struct snd_device_ops ops = {
117 .dev_free = snd_cs5530_dev_free,
121 err = pci_enable_device(pci);
125 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
127 pci_disable_device(pci);
134 err = pci_request_regions(pci, "CS5530");
137 pci_disable_device(pci);
140 chip->pci_base = pci_resource_start(pci, 0);
142 mem = pci_ioremap_bar(pci, 0);
144 snd_cs5530_free(chip);
148 map = readw(mem + 0x18);
152 0:1 * 0x20 + 0x200 = sb base
158 The other bits may be used internally so must be masked */
160 sb_base = 0x220 + 0x20 * (map & 3);
163 printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
165 printk(KERN_ERR "Could not find XpressAudio!\n");
166 snd_cs5530_free(chip);
171 printk(KERN_INFO "CS5530: MPU at 0x300\n");
172 else if (map & (1<<6))
173 printk(KERN_INFO "CS5530: MPU at 0x330\n");
175 irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
176 dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
180 else if (dma8 & 0x40)
182 else if (dma8 & 0x80)
185 printk(KERN_ERR "CS5530: No 16bit DMA enabled\n");
186 snd_cs5530_free(chip);
194 else if (dma8 & 0x08)
197 printk(KERN_ERR "CS5530: No 8bit DMA enabled\n");
198 snd_cs5530_free(chip);
211 printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n");
212 snd_cs5530_free(chip);
216 printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8,
219 err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
220 dma16, SB_HW_CS5530, &chip->sb);
222 printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
223 snd_cs5530_free(chip);
227 err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
229 printk(KERN_ERR "CS5530: Could not create PCM\n");
230 snd_cs5530_free(chip);
234 err = snd_sbmixer_new(chip->sb);
236 printk(KERN_ERR "CS5530: Could not create Mixer\n");
237 snd_cs5530_free(chip);
241 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
243 snd_cs5530_free(chip);
247 snd_card_set_dev(card, &pci->dev);
252 static int snd_cs5530_probe(struct pci_dev *pci,
253 const struct pci_device_id *pci_id)
256 struct snd_card *card;
257 struct snd_cs5530 *chip = NULL;
260 if (dev >= SNDRV_CARDS)
267 err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
272 err = snd_cs5530_create(card, pci, &chip);
278 strcpy(card->driver, "CS5530");
279 strcpy(card->shortname, "CS5530 Audio");
280 sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
282 err = snd_card_register(card);
287 pci_set_drvdata(pci, card);
292 static struct pci_driver cs5530_driver = {
293 .name = KBUILD_MODNAME,
294 .id_table = snd_cs5530_ids,
295 .probe = snd_cs5530_probe,
296 .remove = snd_cs5530_remove,
299 module_pci_driver(cs5530_driver);