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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2014 Google, Inc
* (C) Copyright 2008
* Graeme Russ, graeme.russ@gmail.com.
*
* Some portions from coreboot src/mainboard/google/link/romstage.c
* and src/cpu/intel/model_206ax/bootblock.c
* Copyright (C) 2007-2010 coresystems GmbH
* Copyright (C) 2011 Google Inc.
*/
#include <common.h>
#include <cpu_func.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <init.h>
#include <pch.h>
#include <asm/cpu.h>
#include <asm/cpu_common.h>
#include <asm/intel_regs.h>
#include <asm/io.h>
#include <asm/lapic.h>
#include <asm/lpc_common.h>
#include <asm/microcode.h>
#include <asm/msr.h>
#include <asm/mtrr.h>
#include <asm/pci.h>
#include <asm/post.h>
#include <asm/processor.h>
#include <asm/arch/model_206ax.h>
#include <asm/arch/pch.h>
#include <asm/arch/sandybridge.h>
DECLARE_GLOBAL_DATA_PTR;
static int set_flex_ratio_to_tdp_nominal(void)
{
/* Minimum CPU revision for configurable TDP support */
if (cpuid_eax(1) < IVB_CONFIG_TDP_MIN_CPUID)
return -EINVAL;
return cpu_set_flex_ratio_to_tdp_nominal();
}
int arch_cpu_init(void)
{
post_code(POST_CPU_INIT);
return x86_cpu_init_f();
}
int arch_cpu_init_dm(void)
{
struct pci_controller *hose;
struct udevice *bus, *dev;
int ret;
post_code(0x70);
ret = uclass_get_device(UCLASS_PCI, 0, &bus);
post_code(0x71);
if (ret)
return ret;
post_code(0x72);
hose = dev_get_uclass_priv(bus);
/* TODO(sjg@chromium.org): Get rid of gd->hose */
gd->hose = hose;
ret = uclass_first_device_err(UCLASS_LPC, &dev);
if (ret)
return ret;
/*
* We should do as little as possible before the serial console is
* up. Perhaps this should move to later. Our next lot of init
* happens in checkcpu() when we have a console
*/
ret = set_flex_ratio_to_tdp_nominal();
if (ret)
return ret;
return 0;
}
#define PCH_EHCI0_TEMP_BAR0 0xe8000000
#define PCH_EHCI1_TEMP_BAR0 0xe8000400
#define PCH_XHCI_TEMP_BAR0 0xe8001000
/*
* Setup USB controller MMIO BAR to prevent the reference code from
* resetting the controller.
*
* The BAR will be re-assigned during device enumeration so these are only
* temporary.
*
* This is used to speed up the resume path.
*/
static void enable_usb_bar(struct udevice *bus)
{
pci_dev_t usb0 = PCH_EHCI1_DEV;
pci_dev_t usb1 = PCH_EHCI2_DEV;
pci_dev_t usb3 = PCH_XHCI_DEV;
ulong cmd;
/* USB Controller 1 */
pci_bus_write_config(bus, usb0, PCI_BASE_ADDRESS_0,
PCH_EHCI0_TEMP_BAR0, PCI_SIZE_32);
pci_bus_read_config(bus, usb0, PCI_COMMAND, &cmd, PCI_SIZE_32);
cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
pci_bus_write_config(bus, usb0, PCI_COMMAND, cmd, PCI_SIZE_32);
/* USB Controller 2 */
pci_bus_write_config(bus, usb1, PCI_BASE_ADDRESS_0,
PCH_EHCI1_TEMP_BAR0, PCI_SIZE_32);
pci_bus_read_config(bus, usb1, PCI_COMMAND, &cmd, PCI_SIZE_32);
cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
pci_bus_write_config(bus, usb1, PCI_COMMAND, cmd, PCI_SIZE_32);
/* USB3 Controller 1 */
pci_bus_write_config(bus, usb3, PCI_BASE_ADDRESS_0,
PCH_XHCI_TEMP_BAR0, PCI_SIZE_32);
pci_bus_read_config(bus, usb3, PCI_COMMAND, &cmd, PCI_SIZE_32);
cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
pci_bus_write_config(bus, usb3, PCI_COMMAND, cmd, PCI_SIZE_32);
}
int checkcpu(void)
{
enum pei_boot_mode_t boot_mode = PEI_BOOT_NONE;
struct udevice *dev, *lpc;
uint32_t pm1_cnt;
uint16_t pm1_sts;
int ret;
/* TODO: cmos_post_init() */
if (readl(MCHBAR_REG(SSKPD)) == 0xCAFE) {
debug("soft reset detected\n");
boot_mode = PEI_BOOT_SOFT_RESET;
/* System is not happy after keyboard reset... */
debug("Issuing CF9 warm reset\n");
reset_cpu(0);
}
ret = cpu_common_init();
if (ret) {
debug("%s: cpu_common_init() failed\n", __func__);
return ret;
}
/* Check PM1_STS[15] to see if we are waking from Sx */
pm1_sts = inw(DEFAULT_PMBASE + PM1_STS);
/* Read PM1_CNT[12:10] to determine which Sx state */
pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT);
if ((pm1_sts & WAK_STS) && ((pm1_cnt >> 10) & 7) == 5) {
debug("Resume from S3 detected, but disabled.\n");
} else {
/*
* TODO: An indication of life might be possible here (e.g.
* keyboard light)
*/
}
post_code(POST_EARLY_INIT);
/* Enable SPD ROMs and DDR-III DRAM */
ret = uclass_first_device_err(UCLASS_I2C, &dev);
if (ret) {
debug("%s: Failed to get I2C (ret=%d)\n", __func__, ret);
return ret;
}
/* Prepare USB controller early in S3 resume */
if (boot_mode == PEI_BOOT_RESUME) {
uclass_first_device(UCLASS_LPC, &lpc);
enable_usb_bar(pci_get_controller(lpc->parent));
}
gd->arch.pei_boot_mode = boot_mode;
return 0;
}
int print_cpuinfo(void)
{
char processor_name[CPU_MAX_NAME_LEN];
const char *name;
/* Print processor name */
name = cpu_get_name(processor_name);
printf("CPU: %s\n", name);
post_code(POST_CPU_INFO);
return 0;
}
void board_debug_uart_init(void)
{
/* This enables the debug UART */
pci_x86_write_config(PCH_LPC_DEV, LPC_EN, COMA_LPC_EN, PCI_SIZE_16);
}
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