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DEFINITIONS
This source file includes following definitions.
- mixer_read
- probe_one
- remove_one
- kahlua_init_module
- kahlua_cleanup_module
/*
* Initialisation code for Cyrix/NatSemi VSA1 softaudio
*
* (C) Copyright 2003 Red Hat Inc <alan@redhat.com>
*
* 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.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* TO DO:
* Investigate whether we can portably support Cognac (5520) in the
* same manner.
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
#include "sound_config.h"
#include "sb.h"
/*
* Read a soundblaster compatible mixer register.
* In this case we are actually reading an SMI trap
* not real hardware.
*/
static u8 __devinit mixer_read(unsigned long io, u8 reg)
{
outb(reg, io + 4);
udelay(20);
reg = inb(io + 5);
udelay(20);
return reg;
}
static int __devinit probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct address_info *hw_config;
unsigned long base;
void __iomem *mem;
unsigned long io;
u16 map;
u8 irq, dma8, dma16;
int oldquiet;
extern int sb_be_quiet;
base = pci_resource_start(pdev, 0);
if(base == 0UL)
return 1;
mem = ioremap(base, 128);
if (!mem)
return 1;
map = readw(mem + 0x18); /* Read the SMI enables */
iounmap(mem);
/* 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 */
io = 0x220 + 0x20 * (map & 3);
if(map & (1<<2))
printk(KERN_INFO "kahlua: XpressAudio at 0x%lx\n", io);
else
return 1;
if(map & (1<<5))
printk(KERN_INFO "kahlua: MPU at 0x300\n");
else if(map & (1<<6))
printk(KERN_INFO "kahlua: MPU at 0x330\n");
irq = mixer_read(io, 0x80) & 0x0F;
dma8 = mixer_read(io, 0x81);
// printk("IRQ=%x MAP=%x DMA=%x\n", irq, map, dma8);
if(dma8 & 0x20)
dma16 = 5;
else if(dma8 & 0x40)
dma16 = 6;
else if(dma8 & 0x80)
dma16 = 7;
else
{
printk(KERN_ERR "kahlua: No 16bit DMA enabled.\n");
return 1;
}
if(dma8 & 0x01)
dma8 = 0;
else if(dma8 & 0x02)
dma8 = 1;
else if(dma8 & 0x08)
dma8 = 3;
else
{
printk(KERN_ERR "kahlua: No 8bit DMA enabled.\n");
return 1;
}
if(irq & 1)
irq = 9;
else if(irq & 2)
irq = 5;
else if(irq & 4)
irq = 7;
else if(irq & 8)
irq = 10;
else
{
printk(KERN_ERR "kahlua: SB IRQ not set.\n");
return 1;
}
printk(KERN_INFO "kahlua: XpressAudio on IRQ %d, DMA %d, %d\n",
irq, dma8, dma16);
hw_config = kzalloc(sizeof(struct address_info), GFP_KERNEL);
if(hw_config == NULL)
{
printk(KERN_ERR "kahlua: out of memory.\n");
return 1;
}
pci_set_drvdata(pdev, hw_config);
hw_config->io_base = io;
hw_config->irq = irq;
hw_config->dma = dma8;
hw_config->dma2 = dma16;
hw_config->name = "Cyrix XpressAudio";
hw_config->driver_use_1 = SB_NO_MIDI | SB_PCI_IRQ;
if (!request_region(io, 16, "soundblaster"))
goto err_out_free;
if(sb_dsp_detect(hw_config, 0, 0, NULL)==0)
{
printk(KERN_ERR "kahlua: audio not responding.\n");
release_region(io, 16);
goto err_out_free;
}
oldquiet = sb_be_quiet;
sb_be_quiet = 1;
if(sb_dsp_init(hw_config, THIS_MODULE))
{
sb_be_quiet = oldquiet;
goto err_out_free;
}
sb_be_quiet = oldquiet;
return 0;
err_out_free:
pci_set_drvdata(pdev, NULL);
kfree(hw_config);
return 1;
}
static void __devexit remove_one(struct pci_dev *pdev)
{
struct address_info *hw_config = pci_get_drvdata(pdev);
sb_dsp_unload(hw_config, 0);
pci_set_drvdata(pdev, NULL);
kfree(hw_config);
}
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("Kahlua VSA1 PCI Audio");
MODULE_LICENSE("GPL");
/*
* 5530 only. The 5510/5520 decode is different.
*/
static struct pci_device_id id_tbl[] = {
{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ }
};
MODULE_DEVICE_TABLE(pci, id_tbl);
static struct pci_driver kahlua_driver = {
.name = "kahlua",
.id_table = id_tbl,
.probe = probe_one,
.remove = __devexit_p(remove_one),
};
static int __init kahlua_init_module(void)
{
printk(KERN_INFO "Cyrix Kahlua VSA1 XpressAudio support (c) Copyright 2003 Red Hat Inc\n");
return pci_register_driver(&kahlua_driver);
}
static void __devexit kahlua_cleanup_module(void)
{
pci_unregister_driver(&kahlua_driver);
}
module_init(kahlua_init_module);
module_exit(kahlua_cleanup_module);