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|
/*
* From coreboot southbridge/intel/bd82x6x/lpc.c
*
* Copyright (C) 2008-2009 coresystems GmbH
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <rtc.h>
#include <pci.h>
#include <asm/acpi.h>
#include <asm/interrupt.h>
#include <asm/io.h>
#include <asm/ioapic.h>
#include <asm/pci.h>
#include <asm/arch/pch.h>
#define NMI_OFF 0
#define ENABLE_ACPI_MODE_IN_COREBOOT 0
#define TEST_SMM_FLASH_LOCKDOWN 0
static int pch_enable_apic(pci_dev_t dev)
{
u32 reg32;
int i;
/* Enable ACPI I/O and power management. Set SCI IRQ to IRQ9 */
x86_pci_write_config8(dev, ACPI_CNTL, 0x80);
writel(0, IO_APIC_INDEX);
writel(1 << 25, IO_APIC_DATA);
/* affirm full set of redirection table entries ("write once") */
writel(1, IO_APIC_INDEX);
reg32 = readl(IO_APIC_DATA);
writel(1, IO_APIC_INDEX);
writel(reg32, IO_APIC_DATA);
writel(0, IO_APIC_INDEX);
reg32 = readl(IO_APIC_DATA);
debug("PCH APIC ID = %x\n", (reg32 >> 24) & 0x0f);
if (reg32 != (1 << 25)) {
printf("APIC Error - cannot write to registers\n");
return -EPERM;
}
debug("Dumping IOAPIC registers\n");
for (i = 0; i < 3; i++) {
writel(i, IO_APIC_INDEX);
debug(" reg 0x%04x:", i);
reg32 = readl(IO_APIC_DATA);
debug(" 0x%08x\n", reg32);
}
/* Select Boot Configuration register. */
writel(3, IO_APIC_INDEX);
/* Use Processor System Bus to deliver interrupts. */
writel(1, IO_APIC_DATA);
return 0;
}
static void pch_enable_serial_irqs(pci_dev_t dev)
{
u32 value;
/* Set packet length and toggle silent mode bit for one frame. */
value = (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0);
#ifdef CONFIG_SERIRQ_CONTINUOUS_MODE
x86_pci_write_config8(dev, SERIRQ_CNTL, value);
#else
x86_pci_write_config8(dev, SERIRQ_CNTL, value | (1 << 6));
#endif
}
static int pch_pirq_init(const void *blob, int node, pci_dev_t dev)
{
uint8_t route[8], *ptr;
if (fdtdec_get_byte_array(blob, node, "intel,pirq-routing", route,
sizeof(route)))
return -EINVAL;
ptr = route;
x86_pci_write_config8(dev, PIRQA_ROUT, *ptr++);
x86_pci_write_config8(dev, PIRQB_ROUT, *ptr++);
x86_pci_write_config8(dev, PIRQC_ROUT, *ptr++);
x86_pci_write_config8(dev, PIRQD_ROUT, *ptr++);
x86_pci_write_config8(dev, PIRQE_ROUT, *ptr++);
x86_pci_write_config8(dev, PIRQF_ROUT, *ptr++);
x86_pci_write_config8(dev, PIRQG_ROUT, *ptr++);
x86_pci_write_config8(dev, PIRQH_ROUT, *ptr++);
/*
* TODO(sjg@chromium.org): U-Boot does not set up the interrupts
* here. It's unclear if it is needed
*/
return 0;
}
static int pch_gpi_routing(const void *blob, int node, pci_dev_t dev)
{
u8 route[16];
u32 reg;
int gpi;
if (fdtdec_get_byte_array(blob, node, "intel,gpi-routing", route,
sizeof(route)))
return -EINVAL;
for (reg = 0, gpi = 0; gpi < ARRAY_SIZE(route); gpi++)
reg |= route[gpi] << (gpi * 2);
x86_pci_write_config32(dev, 0xb8, reg);
return 0;
}
static int pch_power_options(const void *blob, int node, pci_dev_t dev)
{
u8 reg8;
u16 reg16, pmbase;
u32 reg32;
const char *state;
int pwr_on;
int nmi_option;
int ret;
/*
* Which state do we want to goto after g3 (power restored)?
* 0 == S0 Full On
* 1 == S5 Soft Off
*
* If the option is not existent (Laptops), use Kconfig setting.
* TODO(sjg@chromium.org): Make this configurable
*/
pwr_on = MAINBOARD_POWER_ON;
reg16 = x86_pci_read_config16(dev, GEN_PMCON_3);
reg16 &= 0xfffe;
switch (pwr_on) {
case MAINBOARD_POWER_OFF:
reg16 |= 1;
state = "off";
break;
case MAINBOARD_POWER_ON:
reg16 &= ~1;
state = "on";
break;
case MAINBOARD_POWER_KEEP:
reg16 &= ~1;
state = "state keep";
break;
default:
state = "undefined";
}
reg16 &= ~(3 << 4); /* SLP_S4# Assertion Stretch 4s */
reg16 |= (1 << 3); /* SLP_S4# Assertion Stretch Enable */
reg16 &= ~(1 << 10);
reg16 |= (1 << 11); /* SLP_S3# Min Assertion Width 50ms */
reg16 |= (1 << 12); /* Disable SLP stretch after SUS well */
x86_pci_write_config16(dev, GEN_PMCON_3, reg16);
debug("Set power %s after power failure.\n", state);
/* Set up NMI on errors. */
reg8 = inb(0x61);
reg8 &= 0x0f; /* Higher Nibble must be 0 */
reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */
reg8 |= (1 << 2); /* PCI SERR# Disable for now */
outb(reg8, 0x61);
reg8 = inb(0x70);
/* TODO(sjg@chromium.org): Make this configurable */
nmi_option = NMI_OFF;
if (nmi_option) {
debug("NMI sources enabled.\n");
reg8 &= ~(1 << 7); /* Set NMI. */
} else {
debug("NMI sources disabled.\n");
/* Can't mask NMI from PCI-E and NMI_NOW */
reg8 |= (1 << 7);
}
outb(reg8, 0x70);
/* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */
reg16 = x86_pci_read_config16(dev, GEN_PMCON_1);
reg16 &= ~(3 << 0); /* SMI# rate 1 minute */
reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */
#if DEBUG_PERIODIC_SMIS
/* Set DEBUG_PERIODIC_SMIS in pch.h to debug using periodic SMIs */
reg16 |= (3 << 0); /* Periodic SMI every 8s */
#endif
x86_pci_write_config16(dev, GEN_PMCON_1, reg16);
/* Set the board's GPI routing. */
ret = pch_gpi_routing(blob, node, dev);
if (ret)
return ret;
pmbase = x86_pci_read_config16(dev, 0x40) & 0xfffe;
writel(pmbase + GPE0_EN, fdtdec_get_int(blob, node,
"intel,gpe0-enable", 0));
writew(pmbase + ALT_GP_SMI_EN, fdtdec_get_int(blob, node,
"intel,alt-gp-smi-enable", 0));
/* Set up power management block and determine sleep mode */
reg32 = inl(pmbase + 0x04); /* PM1_CNT */
reg32 &= ~(7 << 10); /* SLP_TYP */
reg32 |= (1 << 0); /* SCI_EN */
outl(reg32, pmbase + 0x04);
/* Clear magic status bits to prevent unexpected wake */
setbits_le32(RCB_REG(0x3310), (1 << 4) | (1 << 5) | (1 << 0));
clrbits_le32(RCB_REG(0x3f02), 0xf);
return 0;
}
static void pch_rtc_init(pci_dev_t dev)
{
int rtc_failed;
u8 reg8;
reg8 = x86_pci_read_config8(dev, GEN_PMCON_3);
rtc_failed = reg8 & RTC_BATTERY_DEAD;
if (rtc_failed) {
reg8 &= ~RTC_BATTERY_DEAD;
x86_pci_write_config8(dev, GEN_PMCON_3, reg8);
}
debug("rtc_failed = 0x%x\n", rtc_failed);
/* TODO: Handle power failure */
if (rtc_failed)
printf("RTC power failed\n");
}
/* CougarPoint PCH Power Management init */
static void cpt_pm_init(pci_dev_t dev)
{
debug("CougarPoint PM init\n");
x86_pci_write_config8(dev, 0xa9, 0x47);
setbits_le32(RCB_REG(0x2238), (1 << 6) | (1 << 0));
setbits_le32(RCB_REG(0x228c), 1 << 0);
setbits_le32(RCB_REG(0x1100), (1 << 13) | (1 << 14));
setbits_le32(RCB_REG(0x0900), 1 << 14);
writel(0xc0388400, RCB_REG(0x2304));
setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
clrsetbits_le32(RCB_REG(0x3314), ~0x1f, 0xf);
writel(0x050f0000, RCB_REG(0x3318));
writel(0x04000000, RCB_REG(0x3324));
setbits_le32(RCB_REG(0x3340), 0xfffff);
setbits_le32(RCB_REG(0x3344), 1 << 1);
writel(0x0001c000, RCB_REG(0x3360));
writel(0x00061100, RCB_REG(0x3368));
writel(0x7f8fdfff, RCB_REG(0x3378));
writel(0x000003fc, RCB_REG(0x337c));
writel(0x00001000, RCB_REG(0x3388));
writel(0x0001c000, RCB_REG(0x3390));
writel(0x00000800, RCB_REG(0x33a0));
writel(0x00001000, RCB_REG(0x33b0));
writel(0x00093900, RCB_REG(0x33c0));
writel(0x24653002, RCB_REG(0x33cc));
writel(0x062108fe, RCB_REG(0x33d0));
clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
writel(0x01010000, RCB_REG(0x3a28));
writel(0x01010404, RCB_REG(0x3a2c));
writel(0x01041041, RCB_REG(0x3a80));
clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
setbits_le32(RCB_REG(0x3a84), 1 << 24); /* SATA 2/3 disabled */
setbits_le32(RCB_REG(0x3a88), 1 << 0); /* SATA 4/5 disabled */
writel(0x00000001, RCB_REG(0x3a6c));
clrsetbits_le32(RCB_REG(0x2344), ~0x00ffff00, 0xff00000c);
clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
writel(0, RCB_REG(0x33c8));
setbits_le32(RCB_REG(0x21b0), 0xf);
}
/* PantherPoint PCH Power Management init */
static void ppt_pm_init(pci_dev_t dev)
{
debug("PantherPoint PM init\n");
x86_pci_write_config8(dev, 0xa9, 0x47);
setbits_le32(RCB_REG(0x2238), 1 << 0);
setbits_le32(RCB_REG(0x228c), 1 << 0);
setbits_le16(RCB_REG(0x1100), (1 << 13) | (1 << 14));
setbits_le16(RCB_REG(0x0900), 1 << 14);
writel(0xc03b8400, RCB_REG(0x2304));
setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
clrsetbits_le32(RCB_REG(0x3314), 0x1f, 0xf);
writel(0x054f0000, RCB_REG(0x3318));
writel(0x04000000, RCB_REG(0x3324));
setbits_le32(RCB_REG(0x3340), 0xfffff);
setbits_le32(RCB_REG(0x3344), (1 << 1) | (1 << 0));
writel(0x0001c000, RCB_REG(0x3360));
writel(0x00061100, RCB_REG(0x3368));
writel(0x7f8fdfff, RCB_REG(0x3378));
writel(0x000003fd, RCB_REG(0x337c));
writel(0x00001000, RCB_REG(0x3388));
writel(0x0001c000, RCB_REG(0x3390));
writel(0x00000800, RCB_REG(0x33a0));
writel(0x00001000, RCB_REG(0x33b0));
writel(0x00093900, RCB_REG(0x33c0));
writel(0x24653002, RCB_REG(0x33cc));
writel(0x067388fe, RCB_REG(0x33d0));
clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
writel(0x01010000, RCB_REG(0x3a28));
writel(0x01010404, RCB_REG(0x3a2c));
writel(0x01040000, RCB_REG(0x3a80));
clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
/* SATA 2/3 disabled */
setbits_le32(RCB_REG(0x3a84), 1 << 24);
/* SATA 4/5 disabled */
setbits_le32(RCB_REG(0x3a88), 1 << 0);
writel(0x00000001, RCB_REG(0x3a6c));
clrsetbits_le32(RCB_REG(0x2344), 0xff0000ff, 0xff00000c);
clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
setbits_le32(RCB_REG(0x33a4), (1 << 0));
writel(0, RCB_REG(0x33c8));
setbits_le32(RCB_REG(0x21b0), 0xf);
}
static void enable_hpet(void)
{
/* Move HPET to default address 0xfed00000 and enable it */
clrsetbits_le32(RCB_REG(HPTC), 3 << 0, 1 << 7);
}
static void enable_clock_gating(pci_dev_t dev)
{
u32 reg32;
u16 reg16;
setbits_le32(RCB_REG(0x2234), 0xf);
reg16 = x86_pci_read_config16(dev, GEN_PMCON_1);
reg16 |= (1 << 2) | (1 << 11);
x86_pci_write_config16(dev, GEN_PMCON_1, reg16);
pch_iobp_update(0xEB007F07, ~0UL, (1 << 31));
pch_iobp_update(0xEB004000, ~0UL, (1 << 7));
pch_iobp_update(0xEC007F07, ~0UL, (1 << 31));
pch_iobp_update(0xEC004000, ~0UL, (1 << 7));
reg32 = readl(RCB_REG(CG));
reg32 |= (1 << 31);
reg32 |= (1 << 29) | (1 << 28);
reg32 |= (1 << 27) | (1 << 26) | (1 << 25) | (1 << 24);
reg32 |= (1 << 16);
reg32 |= (1 << 17);
reg32 |= (1 << 18);
reg32 |= (1 << 22);
reg32 |= (1 << 23);
reg32 &= ~(1 << 20);
reg32 |= (1 << 19);
reg32 |= (1 << 0);
reg32 |= (0xf << 1);
writel(reg32, RCB_REG(CG));
setbits_le32(RCB_REG(0x38c0), 0x7);
setbits_le32(RCB_REG(0x36d4), 0x6680c004);
setbits_le32(RCB_REG(0x3564), 0x3);
}
#if CONFIG_HAVE_SMI_HANDLER
static void pch_lock_smm(pci_dev_t dev)
{
#if TEST_SMM_FLASH_LOCKDOWN
u8 reg8;
#endif
if (acpi_slp_type != 3) {
#if ENABLE_ACPI_MODE_IN_COREBOOT
debug("Enabling ACPI via APMC:\n");
outb(0xe1, 0xb2); /* Enable ACPI mode */
debug("done.\n");
#else
debug("Disabling ACPI via APMC:\n");
outb(0x1e, 0xb2); /* Disable ACPI mode */
debug("done.\n");
#endif
}
/* Don't allow evil boot loaders, kernels, or
* userspace applications to deceive us:
*/
smm_lock();
#if TEST_SMM_FLASH_LOCKDOWN
/* Now try this: */
debug("Locking BIOS to RO... ");
reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
(reg8 & 1) ? "rw" : "ro");
reg8 &= ~(1 << 0); /* clear BIOSWE */
x86_pci_write_config8(dev, 0xdc, reg8);
reg8 |= (1 << 1); /* set BLE */
x86_pci_write_config8(dev, 0xdc, reg8);
debug("ok.\n");
reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
(reg8 & 1) ? "rw" : "ro");
debug("Writing:\n");
writeb(0, 0xfff00000);
debug("Testing:\n");
reg8 |= (1 << 0); /* set BIOSWE */
x86_pci_write_config8(dev, 0xdc, reg8);
reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
(reg8 & 1) ? "rw" : "ro");
debug("Done.\n");
#endif
}
#endif
static void pch_disable_smm_only_flashing(pci_dev_t dev)
{
u8 reg8;
debug("Enabling BIOS updates outside of SMM... ");
reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
reg8 &= ~(1 << 5);
x86_pci_write_config8(dev, 0xdc, reg8);
}
static void pch_fixups(pci_dev_t dev)
{
u8 gen_pmcon_2;
/* Indicate DRAM init done for MRC S3 to know it can resume */
gen_pmcon_2 = x86_pci_read_config8(dev, GEN_PMCON_2);
gen_pmcon_2 |= (1 << 7);
x86_pci_write_config8(dev, GEN_PMCON_2, gen_pmcon_2);
/* Enable DMI ASPM in the PCH */
clrbits_le32(RCB_REG(0x2304), 1 << 10);
setbits_le32(RCB_REG(0x21a4), (1 << 11) | (1 << 10));
setbits_le32(RCB_REG(0x21a8), 0x3);
}
/*
* Enable Prefetching and Caching.
*/
static void enable_spi_prefetch(struct udevice *pch)
{
u8 reg8;
dm_pci_read_config8(pch, 0xdc, ®8);
reg8 &= ~(3 << 2);
reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
dm_pci_write_config8(pch, 0xdc, reg8);
}
static void enable_port80_on_lpc(struct udevice *pch)
{
/* Enable port 80 POST on LPC */
dm_pci_write_config32(pch, PCH_RCBA_BASE, DEFAULT_RCBA | 1);
clrbits_le32(RCB_REG(GCS), 4);
}
static void set_spi_speed(void)
{
u32 fdod;
/* Observe SPI Descriptor Component Section 0 */
writel(0x1000, RCB_REG(SPI_DESC_COMP0));
/* Extract the1 Write/Erase SPI Frequency from descriptor */
fdod = readl(RCB_REG(SPI_FREQ_WR_ERA));
fdod >>= 24;
fdod &= 7;
/* Set Software Sequence frequency to match */
clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod);
}
/**
* lpc_early_init() - set up LPC serial ports and other early things
*
* @dev: LPC device
* @return 0 if OK, -ve on error
*/
static int lpc_early_init(struct udevice *dev)
{
struct reg_info {
u32 base;
u32 size;
} values[4], *ptr;
int count;
int i;
count = fdtdec_get_int_array_count(gd->fdt_blob, dev->of_offset,
"intel,gen-dec", (u32 *)values,
sizeof(values) / sizeof(u32));
if (count < 0)
return -EINVAL;
/* Set COM1/COM2 decode range */
dm_pci_write_config16(dev->parent, LPC_IO_DEC, 0x0010);
/* Enable PS/2 Keyboard/Mouse, EC areas and COM1 */
dm_pci_write_config16(dev->parent, LPC_EN, KBC_LPC_EN | MC_LPC_EN |
GAMEL_LPC_EN | COMA_LPC_EN);
/* Write all registers but use 0 if we run out of data */
count = count * sizeof(u32) / sizeof(values[0]);
for (i = 0, ptr = values; i < ARRAY_SIZE(values); i++, ptr++) {
u32 reg = 0;
if (i < count)
reg = ptr->base | PCI_COMMAND_IO | (ptr->size << 16);
dm_pci_write_config32(dev->parent, LPC_GENX_DEC(i), reg);
}
enable_spi_prefetch(dev->parent);
/* This is already done in start.S, but let's do it in C */
enable_port80_on_lpc(dev->parent);
set_spi_speed();
return 0;
}
int lpc_init_extra(struct pci_controller *hose, pci_dev_t dev)
{
const void *blob = gd->fdt_blob;
int node;
debug("pch: lpc_init\n");
pci_write_bar32(hose, dev, 0, 0);
pci_write_bar32(hose, dev, 1, 0xff800000);
pci_write_bar32(hose, dev, 2, 0xfec00000);
pci_write_bar32(hose, dev, 3, 0x800);
pci_write_bar32(hose, dev, 4, 0x900);
node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_PCH);
if (node < 0)
return -ENOENT;
/* Set the value for PCI command register. */
x86_pci_write_config16(dev, PCI_COMMAND, 0x000f);
/* IO APIC initialization. */
pch_enable_apic(dev);
pch_enable_serial_irqs(dev);
/* Setup the PIRQ. */
pch_pirq_init(blob, node, dev);
/* Setup power options. */
pch_power_options(blob, node, dev);
/* Initialize power management */
switch (pch_silicon_type()) {
case PCH_TYPE_CPT: /* CougarPoint */
cpt_pm_init(dev);
break;
case PCH_TYPE_PPT: /* PantherPoint */
ppt_pm_init(dev);
break;
default:
printf("Unknown Chipset: %#02x.%dx\n", PCI_DEV(dev),
PCI_FUNC(dev));
return -ENOSYS;
}
/* Initialize the real time clock. */
pch_rtc_init(dev);
/* Initialize the High Precision Event Timers, if present. */
enable_hpet();
/* Initialize Clock Gating */
enable_clock_gating(dev);
pch_disable_smm_only_flashing(dev);
#if CONFIG_HAVE_SMI_HANDLER
pch_lock_smm(dev);
#endif
pch_fixups(dev);
return 0;
}
void lpc_enable(pci_dev_t dev)
{
/* Enable PCH Display Port */
writew(0x0010, RCB_REG(DISPBDF));
setbits_le32(RCB_REG(FD2), PCH_ENABLE_DBDF);
}
static int bd82x6x_lpc_early_init(struct udevice *dev)
{
/* Setting up Southbridge. In the northbridge code. */
debug("Setting up static southbridge registers\n");
dm_pci_write_config32(dev->parent, PCH_RCBA_BASE, DEFAULT_RCBA | 1);
dm_pci_write_config32(dev->parent, PMBASE, DEFAULT_PMBASE | 1);
/* Enable ACPI BAR */
dm_pci_write_config8(dev->parent, ACPI_CNTL, 0x80);
debug("Disabling watchdog reboot\n");
setbits_le32(RCB_REG(GCS), 1 >> 5); /* No reset */
outw(1 << 11, DEFAULT_PMBASE | 0x60 | 0x08); /* halt timer */
return 0;
}
static int bd82x6x_lpc_probe(struct udevice *dev)
{
int ret;
if (gd->flags & GD_FLG_RELOC)
return 0;
ret = lpc_early_init(dev);
if (ret) {
debug("%s: lpc_early_init() failed\n", __func__);
return ret;
}
return bd82x6x_lpc_early_init(dev);
}
static const struct udevice_id bd82x6x_lpc_ids[] = {
{ .compatible = "intel,bd82x6x-lpc" },
{ }
};
U_BOOT_DRIVER(bd82x6x_lpc_drv) = {
.name = "lpc",
.id = UCLASS_LPC,
.of_match = bd82x6x_lpc_ids,
.probe = bd82x6x_lpc_probe,
};
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