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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <arch/io.h>
#include <device/pci_ops.h>
#include <device/device.h>
#include <device/pci.h>
#include <console/console.h>
#include "chip.h"
#include "i82801ix.h"
typedef struct southbridge_intel_i82801ix_config config_t;
static void i82801ix_enable_device(struct device *dev)
{
u32 reg32;
/* Enable SERR */
reg32 = pci_read_config32(dev, PCI_COMMAND);
reg32 |= PCI_COMMAND_SERR;
pci_write_config32(dev, PCI_COMMAND, reg32);
}
static void i82801ix_early_settings(const config_t *const info)
{
/* Program FERR# as processor break event indicator. */
RCBA32(GCS) |= (1 << 6);
/* BIOS must program...
* NB: other CIRs are handled in i82801ix_dmi_setup(). */
RCBA32(RCBA_CIR8) = (RCBA32(RCBA_CIR8) & ~(0x3 << 0)) | (0x2 << 0);
RCBA32(RCBA_FD) |= (1 << 0);
RCBA32(RCBA_CIR9) = (RCBA32(RCBA_CIR9) & ~(0x3 << 26)) | (0x2 << 26);
RCBA32(RCBA_CIR7) = (RCBA32(RCBA_CIR7) & ~(0xf << 16)) | (0x5 << 16);
RCBA32(RCBA_CIR13) = (RCBA32(RCBA_CIR13) & ~(0xf << 16)) | (0x5 << 16);
/* RCBA32(RCBA_CIR5) |= (1 << 0); cf. Specification Update */
RCBA32(RCBA_CIR10) |= (3 << 16);
}
static void i82801ix_pcie_init(const config_t *const info)
{
struct device *pciePort[6];
int i, slot_number = 1; /* Reserve slot number 0 for nb's PEG. */
u32 reg32;
/* PCIe - BIOS must program... */
for (i = 0; i < 6; ++i) {
pciePort[i] = pcidev_on_root(0x1c, i);
if (!pciePort[i]) {
printk(BIOS_EMERG, "PCIe port 00:1c.%x", i);
die(" is not listed in devicetree.\n");
}
reg32 = pci_read_config32(pciePort[i], 0x300);
pci_write_config32(pciePort[i], 0x300, reg32 | (1 << 21));
pci_write_config8(pciePort[i], 0x324, 0x40);
}
if (LPC_IS_MOBILE(pcidev_on_root(0x1f, 0))) {
for (i = 0; i < 6; ++i) {
if (pciePort[i]->enabled) {
reg32 = pci_read_config32(pciePort[i], 0xe8);
reg32 |= 1;
pci_write_config32(pciePort[i], 0xe8, reg32);
}
}
}
for (i = 5; (i >= 0) && !pciePort[i]->enabled; --i) {
/* Only for the top disabled ports. */
reg32 = pci_read_config32(pciePort[i], 0x300);
reg32 |= 0x3 << 16;
pci_write_config32(pciePort[i], 0x300, reg32);
}
/* Set slot implemented, slot number and slot power limits. */
for (i = 0; i < 6; ++i) {
struct device *const dev = pciePort[i];
u32 xcap = pci_read_config32(dev, D28Fx_XCAP);
if (info->pcie_slot_implemented & (1 << i))
xcap |= PCI_EXP_FLAGS_SLOT;
else
xcap &= ~PCI_EXP_FLAGS_SLOT;
pci_write_config32(dev, D28Fx_XCAP, xcap);
if (info->pcie_slot_implemented & (1 << i)) {
u32 slcap = pci_read_config32(dev, D28Fx_SLCAP);
slcap &= ~(0x1fff << 19);
slcap |= (slot_number++ << 19);
slcap &= ~(0x0003 << 16);
slcap |= (info->pcie_power_limits[i].scale << 16);
slcap &= ~(0x00ff << 7);
slcap |= (info->pcie_power_limits[i].value << 7);
pci_write_config32(dev, D28Fx_SLCAP, slcap);
}
}
/* Lock R/WO ASPM support bits. */
for (i = 0; i < 6; ++i) {
reg32 = pci_read_config32(pciePort[i], 0x4c);
pci_write_config32(pciePort[i], 0x4c, reg32);
}
}
static void i82801ix_ehci_init(void)
{
struct device *const pciEHCI1 = pcidev_on_root(0x1d, 7);
if (!pciEHCI1)
die("EHCI controller (00:1d.7) not listed in devicetree.\n");
struct device *const pciEHCI2 = pcidev_on_root(0x1a, 7);
if (!pciEHCI2)
die("EHCI controller (00:1a.7) not listed in devicetree.\n");
u32 reg32;
/* TODO: Maybe we have to save and
restore these settings across S3. */
reg32 = pci_read_config32(pciEHCI1, 0xfc);
pci_write_config32(pciEHCI1, 0xfc, (reg32 & ~(3 << 2)) |
(1 << 29) | (1 << 17) | (2 << 2));
reg32 = pci_read_config32(pciEHCI2, 0xfc);
pci_write_config32(pciEHCI2, 0xfc, (reg32 & ~(3 << 2)) |
(1 << 29) | (1 << 17) | (2 << 2));
}
static int i82801ix_function_disabled(const unsigned int devfn)
{
struct device *const dev = pcidev_path_on_root(devfn);
if (!dev) {
printk(BIOS_EMERG,
"PCI device 00:%x.%x",
PCI_SLOT(devfn), PCI_FUNC(devfn));
die(" is not listed in devicetree.\n");
}
return !dev->enabled;
}
static void i82801ix_hide_functions(void)
{
int i;
u32 reg32;
/* FIXME: This works pretty good if the devicetree is consistent. But
some functions have to be disabled in right order and/or have
other constraints. */
if (i82801ix_function_disabled(PCI_DEVFN(0x19, 0)))
RCBA32(RCBA_BUC) |= BUC_LAND;
reg32 = RCBA32(RCBA_FD);
struct {
int devfn;
u32 mask;
} functions[] = {
{ PCI_DEVFN(0x1a, 0), FD_U4D }, /* UHCI #4 */
{ PCI_DEVFN(0x1a, 1), FD_U5D }, /* UHCI #5 */
{ PCI_DEVFN(0x1a, 2), FD_U6D }, /* UHCI #6 */
{ PCI_DEVFN(0x1a, 7), FD_EHCI2D }, /* EHCI #2 */
{ PCI_DEVFN(0x1b, 0), FD_HDAD }, /* HD Audio */
{ PCI_DEVFN(0x1c, 0), FD_PE1D }, /* PCIe #1 */
{ PCI_DEVFN(0x1c, 1), FD_PE2D }, /* PCIe #2 */
{ PCI_DEVFN(0x1c, 2), FD_PE3D }, /* PCIe #3 */
{ PCI_DEVFN(0x1c, 3), FD_PE4D }, /* PCIe #4 */
{ PCI_DEVFN(0x1c, 4), FD_PE5D }, /* PCIe #5 */
{ PCI_DEVFN(0x1c, 5), FD_PE6D }, /* PCIe #6 */
{ PCI_DEVFN(0x1d, 0), FD_U1D }, /* UHCI #1 */
{ PCI_DEVFN(0x1d, 1), FD_U2D }, /* UHCI #2 */
{ PCI_DEVFN(0x1d, 2), FD_U3D }, /* UHCI #3 */
{ PCI_DEVFN(0x1d, 7), FD_EHCI1D }, /* EHCI #1 */
{ PCI_DEVFN(0x1f, 0), FD_LBD }, /* LPC */
{ PCI_DEVFN(0x1f, 2), FD_SAD1 }, /* SATA #1 */
{ PCI_DEVFN(0x1f, 3), FD_SD }, /* SMBus */
{ PCI_DEVFN(0x1f, 5), FD_SAD2 }, /* SATA #2 */
{ PCI_DEVFN(0x1f, 6), FD_TTD }, /* Thermal Throttle */
};
for (i = 0; i < ARRAY_SIZE(functions); ++i) {
if (i82801ix_function_disabled(functions[i].devfn))
reg32 |= functions[i].mask;
}
RCBA32(RCBA_FD) = reg32;
RCBA32(RCBA_FD) |= (1 << 0); /* BIOS must write this... */
RCBA32(RCBA_FDSW) |= (1 << 7); /* Lock function-disable? */
/* Hide PCIe root port PCI functions. RPFN is partially R/WO. */
reg32 = RCBA32(RCBA_RPFN);
for (i = 0; i < 6; ++i) {
if (i82801ix_function_disabled(PCI_DEVFN(0x1c, i)))
reg32 |= (1 << ((i * 4) + 3));
}
RCBA32(RCBA_RPFN) = reg32;
/* Lock R/WO UHCI controller #6 remapping. */
RCBA32(RCBA_MAP) = RCBA32(RCBA_MAP);
}
static void i82801ix_init(void *chip_info)
{
const config_t *const info = (config_t *)chip_info;
printk(BIOS_DEBUG, "Initializing i82801ix southbridge...\n");
i82801ix_early_settings(info);
/* PCI Express setup. */
i82801ix_pcie_init(info);
/* EHCI configuration. */
i82801ix_ehci_init();
/* Now hide internal functions. We can't access them after this. */
i82801ix_hide_functions();
/* Reset watchdog timer. */
#if !CONFIG(HAVE_SMI_HANDLER)
outw(0x0008, DEFAULT_TCOBASE + 0x12); /* Set higher timer value. */
#endif
outw(0x0000, DEFAULT_TCOBASE + 0x00); /* Update timer. */
}
struct chip_operations southbridge_intel_i82801ix_ops = {
CHIP_NAME("Intel ICH9/ICH9-M (82801Ix) Series Southbridge")
.enable_dev = i82801ix_enable_device,
.init = i82801ix_init,
};
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