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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <arch/io.h>
#include <device/pci_ops.h>
#include <delay.h>
#include "i82801dx.h"
#define NAMBAR 0x10
#define MASTER_VOL 0x02
#define PAGING 0x24
#define EXT_AUDIO 0x28
#define FUNC_SEL 0x66
#define INFO_IO 0x68
#define CONNECTOR 0x6a
#define VENDOR_ID1 0x7c
#define VENDOR_ID2 0x7e
#define SEC_VENDOR_ID1 0xfc
#define SEC_VENDOR_ID2 0xfe
#define NABMBAR 0x14
#define GLOB_CNT 0x2c
#define GLOB_STA 0x30
#define CAS 0x34
#define MMBAR 0x10
#define EXT_MODEM_ID1 0x3c
#define EXT_MODEM_ID2 0xbc
#define MBAR 0x14
#define SEC_CODEC 0x40
/* FIXME. This table is probably mainboard specific */
static u16 ac97_function[16*2][4] = {
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
{ (1 << 5), (2 << 11), (1 << 10), (3 << 13) }
};
static u16 nabmbar;
static u16 nambar;
static int ac97_semaphore(void)
{
int timeout;
u8 reg8;
timeout = 0xffff;
do {
reg8 = inb(nabmbar + CAS);
timeout--;
} while ((reg8 & 1) && timeout);
if (! timeout) {
printk(BIOS_DEBUG, "Timeout!\n");
}
return (!timeout);
}
static void init_cnr(void)
{
// TODO
}
static void program_sigid(struct device *dev, u32 id)
{
pci_write_config32(dev, 0x2c, id);
}
static void ac97_audio_init(struct device *dev)
{
u16 reg16;
u32 reg32;
int i;
printk(BIOS_DEBUG, "Initializing AC'97 Audio.\n");
/* top 16 bits are zero, so don't read them */
nabmbar = pci_read_config16(dev, NABMBAR) & 0xfffe;
nambar = pci_read_config16(dev, NAMBAR) & 0xfffe;
reg16 = inw(nabmbar + GLOB_CNT);
reg16 |= (1 << 1); /* Remove AC_RESET# */
outw(reg16, nabmbar + GLOB_CNT);
/* Wait 600ms. Ouch. */
udelay(600 * 1000);
init_cnr();
/* Detect Primary AC'97 Codec */
reg32 = inl(nabmbar + GLOB_STA);
if ((reg32 & ((1 << 28) | (1 << 9) | (1 << 8))) == 0) {
/* Primary Codec not found */
printk(BIOS_DEBUG, "No primary codec. Disabling AC'97 Audio.\n");
return;
}
ac97_semaphore();
/* Detect if codec is programmable */
outw(0x8000, nambar + MASTER_VOL);
ac97_semaphore();
if (inw(nambar + MASTER_VOL) != 0x8000) {
printk(BIOS_DEBUG, "Codec not programmable. Disabling AC'97 Audio.\n");
return;
}
/* Program Vendor IDs */
reg32 = inw(nambar + VENDOR_ID1);
reg32 <<= 16;
reg32 |= (u16)inw(nambar + VENDOR_ID2);
program_sigid(dev, reg32);
/* Is Codec AC'97 2.3 compliant? */
reg16 = inw(nambar + EXT_AUDIO);
/* [11:10] = 10b -> AC'97 2.3 */
if ((reg16 & 0x0c00) != 0x0800) {
/* No 2.3 Codec. We're done */
return;
}
/* Select Page 1 */
reg16 = inw(nambar + PAGING);
reg16 &= 0xfff0;
reg16 |= 0x0001;
outw(reg16, nambar + PAGING);
for (i = 0x0a * 2; i > 0; i--) {
outw(i, nambar + FUNC_SEL);
/* Function could not be selected. Next one */
if (inw(nambar + FUNC_SEL) != i)
continue;
reg16 = inw(nambar + INFO_IO);
/* Function Information present? */
if (!(reg16 & (1 << 0)))
continue;
/* Function Information valid? */
if (!(reg16 & (1 << 4)))
continue;
/* Program Buffer Delay [9:5] */
reg16 &= 0x03e0;
reg16 |= ac97_function[i][0];
/* Program Gain [15:11] */
reg16 |= ac97_function[i][1];
/* Program Inversion [10] */
reg16 |= ac97_function[i][2];
outw(reg16, nambar + INFO_IO);
/* Program Connector / Jack Location */
reg16 = inw(nambar + CONNECTOR);
reg16 &= 0x1fff;
reg16 |= ac97_function[i][3];
outw(reg16, nambar + CONNECTOR);
}
}
static void ac97_modem_init(struct device *dev)
{
u16 reg16;
u32 reg32;
u16 mmbar, mbar;
mmbar = pci_read_config16(dev, MMBAR) & 0xfffe;
mbar = pci_read_config16(dev, MBAR) & 0xfffe;
reg16 = inw(mmbar + EXT_MODEM_ID1);
if ((reg16 & 0xc000) != 0xc000) {
if (reg16 & (1 << 0)) {
reg32 = inw(mmbar + VENDOR_ID2);
reg32 <<= 16;
reg32 |= (u16)inw(mmbar + VENDOR_ID1);
program_sigid(dev, reg32);
return;
}
}
/* Secondary codec? */
reg16 = inw(mbar + SEC_CODEC);
if ((reg16 & (1 << 9)) == 0)
return;
reg16 = inw(mmbar + EXT_MODEM_ID2);
if ((reg16 & 0xc000) == 0x4000) {
if (reg16 & (1 << 0)) {
reg32 = inw(mmbar + SEC_VENDOR_ID2);
reg32 <<= 16;
reg32 |= (u16)inw(mmbar + SEC_VENDOR_ID1);
program_sigid(dev, reg32);
return;
}
}
}
static struct device_operations ac97_audio_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.enable = i82801dx_enable,
.init = ac97_audio_init,
};
static struct device_operations ac97_modem_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.enable = i82801dx_enable,
.init = ac97_modem_init,
};
/* 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) */
static const struct pci_driver i82801db_ac97_audio __pci_driver = {
.ops = &ac97_audio_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_82801DB_AC97_AUDIO,
};
static const struct pci_driver i82801db_ac97_modem __pci_driver = {
.ops = &ac97_modem_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_82801DB_AC97_MODEM,
};
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