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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
* Copyright (C) 2014 Google Inc.
* Copyright (C) 2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "chip.h"
#include <console/console.h>
#include <delay.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <pc80/isa-dma.h>
#include <pc80/i8259.h>
#include <arch/io.h>
#include <arch/ioapic.h>
#include <intelblocks/itss.h>
#include <intelblocks/lpc_lib.h>
#include <intelblocks/pcr.h>
#include <reg_script.h>
#include <soc/iomap.h>
#include <soc/pcr_ids.h>
#include <soc/intel/common/block/lpc/lpc_def.h>
/**
PCH preserved MMIO range, 24 MB, from 0xFD000000 to 0xFE7FFFFF
**/
static const struct lpc_mmio_range skl_lpc_fixed_mmio_ranges[] = {
{ PCH_PRESERVED_BASE_ADDRESS, PCH_PRESERVED_BASE_SIZE },
{ 0, 0 }
};
const struct lpc_mmio_range *soc_get_fixed_mmio_ranges(void)
{
return skl_lpc_fixed_mmio_ranges;
}
static void pch_enable_ioapic(struct device *dev)
{
u32 reg32;
/* PCH-LP has 120 redirection entries */
const int redir_entries = 120;
set_ioapic_id((void *)IO_APIC_ADDR, 0x02);
/* affirm full set of redirection table entries ("write once") */
reg32 = io_apic_read((void *)IO_APIC_ADDR, 0x01);
reg32 &= ~0x00ff0000;
reg32 |= (redir_entries - 1) << 16;
io_apic_write((void *)IO_APIC_ADDR, 0x01, reg32);
/*
* Select Boot Configuration register (0x03) and
* use Processor System Bus (0x01) to deliver interrupts.
*/
io_apic_write((void *)IO_APIC_ADDR, 0x03, 0x01);
}
void soc_get_gen_io_dec_range(const struct device *dev, uint32_t *gen_io_dec)
{
const config_t *config = dev->chip_info;
gen_io_dec[0] = config->gen1_dec;
gen_io_dec[1] = config->gen2_dec;
gen_io_dec[2] = config->gen3_dec;
gen_io_dec[3] = config->gen4_dec;
}
void soc_setup_dmi_pcr_io_dec(uint32_t *gen_io_dec)
{
uint16_t lpc_en;
/* Mirror these same settings in DMI PCR */
pcr_write32(PID_DMI, PCR_DMI_LPCLGIR1, gen_io_dec[0]);
pcr_write32(PID_DMI, PCR_DMI_LPCLGIR2, gen_io_dec[1]);
pcr_write32(PID_DMI, PCR_DMI_LPCLGIR3, gen_io_dec[2]);
pcr_write32(PID_DMI, PCR_DMI_LPCLGIR4, gen_io_dec[3]);
/* LPC IO Decode Enable */
lpc_en = pci_read_config16(PCH_DEV_LPC, LPC_IO_ENABLES);
pcr_write16(PID_DMI, PCR_DMI_LPCIOE, lpc_en);
}
static const struct reg_script pch_misc_init_script[] = {
/* Setup NMI on errors, disable SERR */
REG_IO_RMW8(0x61, ~0xf0, (1 << 2)),
/* Disable NMI sources */
REG_IO_OR8(0x70, (1 << 7)),
/* Enable BIOS updates outside of SMM */
REG_PCI_RMW8(0xdc, ~(1 << 5), 0),
REG_SCRIPT_END
};
static void clock_gate_8254(struct device *dev)
{
const config_t *config = dev->chip_info;
if (!config->clock_gate_8254)
return;
itss_clock_gate_8254();
}
void lpc_init(struct device *dev)
{
/* Legacy initialization */
isa_dma_init();
reg_script_run_on_dev(PCH_DEV_LPC, pch_misc_init_script);
/* Enable CLKRUN_EN for power gating LPC */
lpc_enable_pci_clk_cntl();
/* Set LPC Serial IRQ mode */
if (IS_ENABLED(CONFIG_SERIRQ_CONTINUOUS_MODE))
lpc_set_serirq_mode(SERIRQ_CONTINUOUS);
else
lpc_set_serirq_mode(SERIRQ_QUIET);
/* Interrupt configuration */
pch_enable_ioapic(dev);
soc_pch_pirq_init(dev);
setup_i8259();
i8259_configure_irq_trigger(9, 1);
clock_gate_8254(dev);
}
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