// SPDX-License-Identifier: GPL-2.0-or-later
/*
* cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
*
* (C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
* (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
*
* This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did
* mess with it a bit. The chip seems to have to have trouble with full duplex
* mode. If we're recording in 8bit 8000kHz, say, and we then attempt to
* simultaneously play back audio at 16bit 44100kHz, the device actually plays
* back in the same format in which it is capturing. By forcing the chip to
* always play/capture in 16/44100, we can let alsa-lib convert the samples and
* that way we can hack up some full duplex audio.
*
* XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
* The older version (VSA1) provides fairly good soundblaster emulation
* although there are a couple of bugs: large DMA buffers break record,
* and the MPU event handling seems suspect. VSA2 allows the native driver
* to control the AC97 audio engine directly and requires a different driver.
*
* Thanks to National Semiconductor for providing the needed information
* on the XpressAudio(tm) internals.
*
* TO DO:
* Investigate whether we can portably support Cognac (5520) in the
* same manner.
*/
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/sb.h>
#include <sound/initval.h>
MODULE_AUTHOR("Ash Willis");
MODULE_DESCRIPTION("CS5530 Audio");
MODULE_LICENSE("GPL");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");
struct snd_cs5530 {
struct snd_card *card;
struct pci_dev *pci;
struct snd_sb *sb;
unsigned long pci_base;
};
static const struct pci_device_id snd_cs5530_ids[] = {
{PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
PCI_ANY_ID, 0, 0},
{0,}
};
MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
{
outb(reg, io + 4);
udelay(20);
reg = inb(io + 5);
udelay(20);
return reg;
}
static int snd_cs5530_create(struct snd_card *card,
struct pci_dev *pci)
{
struct snd_cs5530 *chip = card->private_data;
unsigned long sb_base;
u8 irq, dma8, dma16 = 0;
u16 map;
void __iomem *mem;
int err;
err = pcim_enable_device(pci);
if (err < 0)
return err;
chip->card = card;
chip->pci = pci;
err = pcim_iomap_regions(pci, 1 << 0, "CS5530");
if (err < 0)
return err;
chip->pci_base = pci_resource_start(pci, 0);
mem = pcim_iomap_table(pci)[0];
map = readw(mem + 0x18);
/* Map bits
0:1 * 0x20 + 0x200 = sb base
2 sb enable
3 adlib enable
5 MPU enable 0x330
6 MPU enable 0x300
The other bits may be used internally so must be masked */
sb_base = 0x220 + 0x20 * (map & 3);
if (map & (1<<2))
dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
else {
dev_err(card->dev, "Could not find XpressAudio!\n");
return -ENODEV;
}
if (map & (1<<5))
dev_info(card->dev, "MPU at 0x300\n");
else if (map & (1<<6))
dev_info(card->dev, "MPU at 0x330\n");
irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
if (dma8 & 0x20)
dma16 = 5;
else if (dma8 & 0x40)
dma16 = 6;
else if (dma8 & 0x80)
dma16 = 7;
else {
dev_err(card->dev, "No 16bit DMA enabled\n");
return -ENODEV;
}
if (dma8 & 0x01)
dma8 = 0;
else if (dma8 & 02)
dma8 = 1;
else if (dma8 & 0x08)
dma8 = 3;
else {
dev_err(card->dev, "No 8bit DMA enabled\n");
return -ENODEV;
}
if (irq & 1)
irq = 9;
else if (irq & 2)
irq = 5;
else if (irq & 4)
irq = 7;
else if (irq & 8)
irq = 10;
else {
dev_err(card->dev, "SoundBlaster IRQ not set\n");
return -ENODEV;
}
dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16);
err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
dma16, SB_HW_CS5530, &chip->sb);
if (err < 0) {
dev_err(card->dev, "Could not create SoundBlaster\n");
return err;
}
err = snd_sb16dsp_pcm(chip->sb, 0);
if (err < 0) {
dev_err(card->dev, "Could not create PCM\n");
return err;
}
err = snd_sbmixer_new(chip->sb);
if (err < 0) {
dev_err(card->dev, "Could not create Mixer\n");
return err;
}
return 0;
}
static int snd_cs5530_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
static int dev;
struct snd_card *card;
struct snd_cs5530 *chip;
int err;
if (dev >= SNDRV_CARDS)
return -ENODEV;
if (!enable[dev]) {
dev++;
return -ENOENT;
}
err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
sizeof(*chip), &card);
if (err < 0)
return err;
chip = card->private_data;
err = snd_cs5530_create(card, pci);
if (err < 0)
return err;
strcpy(card->driver, "CS5530");
strcpy(card->shortname, "CS5530 Audio");
sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
err = snd_card_register(card);
if (err < 0)
return err;
pci_set_drvdata(pci, card);
dev++;
return 0;
}
static struct pci_driver cs5530_driver = {
.name = KBUILD_MODNAME,
.id_table = snd_cs5530_ids,
.probe = snd_cs5530_probe,
};
module_pci_driver(cs5530_driver);
