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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) 2017-2018 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 <device/device.h>
#include <device/pci.h>
#include <pc80/isa-dma.h>
#include <pc80/i8259.h>
#include <arch/io.h>
#include <device/pci_ops.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/irq.h>
#include <soc/lpc.h>
#include <soc/pci_devs.h>
#include <soc/pcr_ids.h>
#include "chip.h"
/*
* As per the BWG, Chapter 5.9.1. "PCH BIOS component will reserve
* certain memory range as reserved range for BIOS usage.
* For this SOC, the range will be from 0FC800000h till FE7FFFFFh"
*/
static const struct lpc_mmio_range cnl_lpc_fixed_mmio_ranges[] = {
{ PCH_PRESERVED_BASE_ADDRESS, PCH_PRESERVED_BASE_SIZE },
{ 0, 0 }
};
const struct lpc_mmio_range *soc_get_fixed_mmio_ranges()
{
return cnl_lpc_fixed_mmio_ranges;
}
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)
{
/* 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]);
}
uint8_t get_pch_series(void)
{
uint16_t lpc_did_hi_byte;
uint8_t pch_series = PCH_UNKNOWN_SERIES;
/*
* Fetch upper 8 bits on LPC device ID to determine PCH type
* Adding 1 to the offset to fetch upper 8 bits
*/
lpc_did_hi_byte = pci_read_config8(PCH_DEV_LPC, PCI_DEVICE_ID + 1);
switch (lpc_did_hi_byte) {
case 0x9D: /* CNL-LP */
case 0x02: /* CML-LP */
pch_series = PCH_LP;
break;
case 0xA3:
pch_series = PCH_H;
break;
default:
break;
}
return pch_series;
}
#if ENV_RAMSTAGE
static void soc_mirror_dmi_pcr_io_dec(void)
{
uint32_t io_dec_arr[] = {
pci_read_config32(PCH_DEV_LPC, LPC_GEN1_DEC),
pci_read_config32(PCH_DEV_LPC, LPC_GEN2_DEC),
pci_read_config32(PCH_DEV_LPC, LPC_GEN3_DEC),
pci_read_config32(PCH_DEV_LPC, LPC_GEN4_DEC),
};
/* Mirror these same settings in DMI PCR */
soc_setup_dmi_pcr_io_dec(&io_dec_arr[0]);
}
static void pch_enable_ioapic(const 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);
}
/*
* PIRQ[n]_ROUT[3:0] - PIRQ Routing Control
* 0x00 - 0000 = Reserved
* 0x01 - 0001 = Reserved
* 0x02 - 0010 = Reserved
* 0x03 - 0011 = IRQ3
* 0x04 - 0100 = IRQ4
* 0x05 - 0101 = IRQ5
* 0x06 - 0110 = IRQ6
* 0x07 - 0111 = IRQ7
* 0x08 - 1000 = Reserved
* 0x09 - 1001 = IRQ9
* 0x0A - 1010 = IRQ10
* 0x0B - 1011 = IRQ11
* 0x0C - 1100 = IRQ12
* 0x0D - 1101 = Reserved
* 0x0E - 1110 = IRQ14
* 0x0F - 1111 = IRQ15
* PIRQ[n]_ROUT[7] - PIRQ Routing Control
* 0x80 - The PIRQ is not routed.
*/
void soc_pch_pirq_init(const struct device *dev)
{
struct device *irq_dev;
uint8_t pch_interrupt_routing[MAX_PXRC_CONFIG];
pch_interrupt_routing[0] = PCH_IRQ11;
pch_interrupt_routing[1] = PCH_IRQ10;
pch_interrupt_routing[2] = PCH_IRQ11;
pch_interrupt_routing[3] = PCH_IRQ11;
pch_interrupt_routing[4] = PCH_IRQ11;
pch_interrupt_routing[5] = PCH_IRQ11;
pch_interrupt_routing[6] = PCH_IRQ11;
pch_interrupt_routing[7] = PCH_IRQ11;
itss_irq_init(pch_interrupt_routing);
for (irq_dev = all_devices; irq_dev; irq_dev = irq_dev->next) {
u8 int_pin = 0, int_line = 0;
if (!irq_dev->enabled || irq_dev->path.type != DEVICE_PATH_PCI)
continue;
int_pin = pci_read_config8(irq_dev, PCI_INTERRUPT_PIN);
switch (int_pin) {
case 1: /* INTA# */
int_line = PCH_IRQ11;
break;
case 2: /* INTB# */
int_line = PCH_IRQ10;
break;
case 3: /* INTC# */
int_line = PCH_IRQ11;
break;
case 4: /* INTD# */
int_line = PCH_IRQ11;
break;
}
if (!int_line)
continue;
pci_write_config8(irq_dev, PCI_INTERRUPT_LINE, int_line);
}
}
static void pch_misc_init(void)
{
uint8_t reg8;
/* Setup NMI on errors, disable SERR */
reg8 = (inb(0x61)) & 0xf0;
outb(0x61, (reg8 | (1 << 2)));
/* Disable NMI sources */
outb(0x70, (1 << 7));
};
void lpc_soc_init(struct device *dev)
{
/* Legacy initialization */
isa_dma_init();
pch_misc_init();
/* Enable CLKRUN_EN for power gating LPC */
lpc_enable_pci_clk_cntl();
/* Set LPC Serial IRQ mode */
if (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);
soc_mirror_dmi_pcr_io_dec();
}
/* Fill up LPC IO resource structure inside SoC directory */
void pch_lpc_soc_fill_io_resources(struct device *dev)
{
/*
* PMC pci device gets hidden from PCI bus due to Silicon
* policy hence bind ACPI BASE aka ABASE (offset 0x20) with
* LPC IO resources to ensure that ABASE falls under PCI reserved
* IO memory range.
*
* Note: Don't add any more resource with same offset 0x20
* under this device space.
*/
pch_lpc_add_new_resource(dev, PCI_BASE_ADDRESS_4,
ACPI_BASE_ADDRESS, ACPI_BASE_SIZE, IORESOURCE_IO |
IORESOURCE_ASSIGNED | IORESOURCE_FIXED);
}
#endif
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