From a515849259f71eb92d5465b6bcd9957b73db1889 Mon Sep 17 00:00:00 2001 From: Lijian Zhao Date: Tue, 29 Aug 2017 14:37:17 -0700 Subject: soc/intel/cannonlake: Add lpc pci driver 1.Add common ITSS support as part of LPC driver init code. 2.Add LPC pci driver for CNL Change-Id: I6c810fd7158e1498664b77eecae22132e2f6878f Signed-off-by: Lijian Zhao Reviewed-on: https://review.coreboot.org/21277 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/soc/intel/cannonlake/lpc.c | 206 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 206 insertions(+) create mode 100644 src/soc/intel/cannonlake/lpc.c (limited to 'src/soc/intel/cannonlake/lpc.c') diff --git a/src/soc/intel/cannonlake/lpc.c b/src/soc/intel/cannonlake/lpc.c new file mode 100644 index 0000000000..e906d9981d --- /dev/null +++ b/src/soc/intel/cannonlake/lpc.c @@ -0,0 +1,206 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 coresystems GmbH + * Copyright (C) 2014 Google Inc. + * Copyright (C) 2017 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* +* 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; +} + +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); +} + +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]); +} + + +/* + * 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) +{ + const config_t *config = dev->chip_info; + uint8_t pch_interrupt_routing[MAX_PXRC_CONFIG]; + + pch_interrupt_routing[0] = config->pirqa_routing; + pch_interrupt_routing[1] = config->pirqb_routing; + pch_interrupt_routing[2] = config->pirqc_routing; + pch_interrupt_routing[3] = config->pirqd_routing; + pch_interrupt_routing[4] = config->pirqe_routing; + pch_interrupt_routing[5] = config->pirqf_routing; + pch_interrupt_routing[6] = config->pirqg_routing; + pch_interrupt_routing[7] = config->pirqh_routing; + + itss_irq_init(pch_interrupt_routing); + + device_t irq_dev; + 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 = config->pirqa_routing; + break; + case 2: /* INTB# */ + int_line = config->pirqb_routing; + break; + case 3: /* INTC# */ + int_line = config->pirqc_routing; + break; + case 4: /* INTD# */ + int_line = config->pirqd_routing; + 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_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 (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); +} -- cgit v1.2.3