| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2018 Intel Corp. |
| * |
| * 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 <console/console.h> |
| #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 icl_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 icl_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; |
| |
| /* |
| * 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); |
| |
| if (lpc_did_hi_byte == 0x9D) |
| return PCH_LP; |
| else if (lpc_did_hi_byte == 0xA3) |
| return PCH_H; |
| else |
| return PCH_UNKNOWN_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)); |
| }; |
| |
| static void clock_gate_8254(const struct device *dev) |
| { |
| const config_t *config = dev->chip_info; |
| |
| if (!config->clock_gate_8254) |
| return; |
| |
| itss_clock_gate_8254(); |
| } |
| |
| 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); |
| clock_gate_8254(dev); |
| 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 |