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/* SPDX-License-Identifier: GPL-2.0-only */
#include <arch/io.h>
#include <commonlib/region.h>
#include <console/console.h>
#include <cpu/intel/em64t101_save_state.h>
#include <cpu/intel/model_206ax/model_206ax.h>
#include <cpu/x86/smm.h>
#include <device/mmio.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
#include <northbridge/intel/sandybridge/sandybridge.h>
#include <soc/nvs.h>
#include <southbridge/intel/bd82x6x/me.h>
#include <southbridge/intel/common/finalize.h>
#include <southbridge/intel/common/gpio.h>
#include <southbridge/intel/common/pmutil.h>
#include <types.h>
#include "pch.h"
int southbridge_io_trap_handler(int smif)
{
switch (smif) {
case 0x32:
printk(BIOS_DEBUG, "OS Init\n");
/* gnvs->smif:
* On success, the IO Trap Handler returns 0
* On failure, the IO Trap Handler returns a value != 0
*/
gnvs->smif = 0;
return 1; /* IO trap handled */
}
/* Not handled */
return 0;
}
static void southbridge_gate_memory_reset_real(int offset,
u16 use, u16 io, u16 lvl)
{
u32 reg32;
/* Make sure it is set as GPIO */
reg32 = inl(use);
if (!(reg32 & (1 << offset))) {
reg32 |= (1 << offset);
outl(reg32, use);
}
/* Make sure it is set as output */
reg32 = inl(io);
if (reg32 & (1 << offset)) {
reg32 &= ~(1 << offset);
outl(reg32, io);
}
/* Drive the output low */
reg32 = inl(lvl);
reg32 &= ~(1 << offset);
outl(reg32, lvl);
}
/*
* Drive GPIO 60 low to gate memory reset in S3.
*
* Intel reference designs all use GPIO 60 but it is
* not a requirement and boards could use a different pin.
*/
void southbridge_gate_memory_reset(void)
{
u16 gpiobase;
gpiobase = pci_read_config16(PCH_LPC_DEV, GPIOBASE) & 0xfffc;
if (!gpiobase)
return;
if (CONFIG_DRAM_RESET_GATE_GPIO >= 32)
southbridge_gate_memory_reset_real(CONFIG_DRAM_RESET_GATE_GPIO - 32,
gpiobase + GPIO_USE_SEL2,
gpiobase + GP_IO_SEL2,
gpiobase + GP_LVL2);
else
southbridge_gate_memory_reset_real(CONFIG_DRAM_RESET_GATE_GPIO,
gpiobase + GPIO_USE_SEL,
gpiobase + GP_IO_SEL,
gpiobase + GP_LVL);
}
void southbridge_smi_monitor(void)
{
#define IOTRAP(x) (trap_sts & (1 << x))
u32 trap_sts, trap_cycle;
u32 data, mask = 0;
int i;
trap_sts = RCBA32(0x1e00); // TRSR - Trap Status Register
RCBA32(0x1e00) = trap_sts; // Clear trap(s) in TRSR
trap_cycle = RCBA32(0x1e10);
for (i=16; i<20; i++) {
if (trap_cycle & (1 << i))
mask |= (0xff << ((i - 16) << 2));
}
/* IOTRAP(3) SMI function call */
if (IOTRAP(3)) {
if (gnvs && gnvs->smif)
io_trap_handler(gnvs->smif); // call function smif
return;
}
/* IOTRAP(2) currently unused
* IOTRAP(1) currently unused */
/* IOTRAP(0) SMIC */
if (IOTRAP(0)) {
if (!(trap_cycle & (1 << 24))) { // It's a write
printk(BIOS_DEBUG, "SMI1 command\n");
data = RCBA32(0x1e18);
data &= mask;
// if (smi1)
// southbridge_smi_command(data);
// return;
}
// Fall through to debug
}
printk(BIOS_DEBUG, " trapped io address = 0x%x\n", trap_cycle & 0xfffc);
for (i=0; i < 4; i++) if (IOTRAP(i)) printk(BIOS_DEBUG, " TRAP = %d\n", i);
printk(BIOS_DEBUG, " AHBE = %x\n", (trap_cycle >> 16) & 0xf);
printk(BIOS_DEBUG, " MASK = 0x%08x\n", mask);
printk(BIOS_DEBUG, " read/write: %s\n", (trap_cycle & (1 << 24)) ? "read" : "write");
if (!(trap_cycle & (1 << 24))) {
/* Write Cycle */
data = RCBA32(0x1e18);
printk(BIOS_DEBUG, " iotrap written data = 0x%08x\n", data);
}
#undef IOTRAP
}
/*
* PCH BIOS Spec Rev 0.7.0, Section 13.5
* Additional xHCI Controller Configurations Prior to Entering S3/S4
*/
static void xhci_a0_suspend_smm_workaround(void)
{
/* Workaround only applies to Panther Point stepping A0 */
if (pch_silicon_revision() != PCH_STEP_A0)
return;
/* The BAR is 64-bit, account for it being above 4 GiB */
if (pci_read_config32(PCH_XHCI_DEV, PCI_BASE_ADDRESS_0 + 4))
return;
/* PCH datasheet indicates that only the upper 16 bits are valid */
uintptr_t xhci_bar = pci_read_config32(PCH_XHCI_DEV, PCI_BASE_ADDRESS_0) &
~PCI_BASE_ADDRESS_MEM_ATTR_MASK;
if (smm_points_to_smram((void *)xhci_bar, 64 * KiB))
return;
/* Step 1: Set power state to D0 */
pci_and_config16(PCH_XHCI_DEV, XHCI_PWR_CNTL_STS, ~(3 << 0));
/* Step 2 */
pci_or_config16(PCH_XHCI_DEV, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
/* Steps 3 to 6: If USB3 PORTSC current connect status (bit 0) is set, do IOBP magic */
for (unsigned int port = 0; port < 4; port++) {
if (read32p((xhci_bar + XHCI_PORTSC_x_USB3(port))) & (1 << 0))
pch_iobp_update(0xec000082 + 0x100 * port, ~0, 3 << 2);
}
/* Step 7 */
pci_and_config16(PCH_XHCI_DEV, PCI_COMMAND, ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY));
/* Step 8: Set power state to D3 */
pci_or_config16(PCH_XHCI_DEV, XHCI_PWR_CNTL_STS, 3 << 0);
}
void southbridge_smm_xhci_sleep(u8 slp_type)
{
/* Only Panther Point has xHCI */
if (pch_silicon_type() != PCH_TYPE_PPT)
return;
/* Verify that RCBA is still valid */
if (pci_read_config32(PCH_LPC_DEV, RCBA) != (CONFIG_FIXED_RCBA_MMIO_BASE | RCBA_ENABLE))
return;
if (RCBA32(FD) & PCH_DISABLE_XHCI)
return;
switch (slp_type) {
case ACPI_S3:
case ACPI_S4:
xhci_a0_suspend_smm_workaround();
break;
case ACPI_S5:
/*
* PCH BIOS Spec Rev 0.7.0, Section 13.5
* Additional xHCI Controller Configurations Prior to Entering S5
*
* For all steppings:
* Step 1: Set power state to D3 (bits 1:0)
* Step 2: Set PME# enable bit (bit 8)
*/
pci_or_config16(PCH_XHCI_DEV, XHCI_PWR_CNTL_STS, 1 << 8 | 3 << 0);
break;
}
}
void southbridge_finalize_all(void)
{
intel_me_finalize_smm();
intel_pch_finalize_smm();
intel_sandybridge_finalize_smm();
intel_model_206ax_finalize_smm();
}
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