| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <arch/hpet.h> |
| #include <arch/io.h> |
| #include <arch/ioapic.h> |
| #include <console/console.h> |
| #include <cpu/x86/smm.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/pci_ops.h> |
| #include <option.h> |
| #include <pc80/i8259.h> |
| #include <pc80/isa-dma.h> |
| #include <pc80/mc146818rtc.h> |
| #include <types.h> |
| |
| #include "chip.h" |
| #include "i82801dx.h" |
| |
| #define NMI_OFF 0 |
| |
| typedef struct southbridge_intel_i82801dx_config config_t; |
| |
| /** |
| * Set miscellaneous static southbridge features. |
| * |
| * @param dev PCI device with I/O APIC control registers |
| */ |
| static void i82801dx_enable_ioapic(struct device *dev) |
| { |
| u32 reg32; |
| |
| reg32 = pci_read_config32(dev, GEN_CNTL); |
| reg32 |= (1 << 13); /* Coprocessor error enable (COPR_ERR_EN) */ |
| reg32 |= (3 << 7); /* IOAPIC enable (APIC_EN) */ |
| reg32 |= (1 << 2); /* DMA collection buffer enable (DCB_EN) */ |
| reg32 |= (1 << 1); /* Delayed transaction enable (DTE) */ |
| pci_write_config32(dev, GEN_CNTL, reg32); |
| printk(BIOS_DEBUG, "IOAPIC Southbridge enabled %x\n", reg32); |
| |
| register_new_ioapic_gsi0(VIO_APIC_VADDR); |
| |
| ioapic_set_boot_config(VIO_APIC_VADDR, true); |
| } |
| |
| static void i82801dx_enable_serial_irqs(struct device *dev) |
| { |
| /* Set packet length and toggle silent mode bit. */ |
| pci_write_config8(dev, SERIRQ_CNTL, |
| (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0)); |
| pci_write_config8(dev, SERIRQ_CNTL, |
| (1 << 7) | (0 << 6) | ((21 - 17) << 2) | (0 << 0)); |
| } |
| |
| static void i82801dx_pirq_init(struct device *dev) |
| { |
| /* Get the chip configuration */ |
| config_t *config = dev->chip_info; |
| |
| pci_write_config8(dev, PIRQA_ROUT, config->pirqa_routing); |
| pci_write_config8(dev, PIRQB_ROUT, config->pirqb_routing); |
| pci_write_config8(dev, PIRQC_ROUT, config->pirqc_routing); |
| pci_write_config8(dev, PIRQD_ROUT, config->pirqd_routing); |
| pci_write_config8(dev, PIRQE_ROUT, config->pirqe_routing); |
| pci_write_config8(dev, PIRQF_ROUT, config->pirqf_routing); |
| pci_write_config8(dev, PIRQG_ROUT, config->pirqg_routing); |
| pci_write_config8(dev, PIRQH_ROUT, config->pirqh_routing); |
| } |
| |
| static void i82801dx_power_options(struct device *dev) |
| { |
| u8 reg8; |
| u16 reg16, pmbase; |
| u32 reg32; |
| const char *state; |
| |
| /* Which state do we want to goto after g3 (power restored)? |
| * 0 == S0 Full On |
| * 1 == S5 Soft Off |
| * |
| * If the option is not existent (Laptops), use MAINBOARD_POWER_ON. |
| */ |
| const unsigned int pwr_on = get_uint_option("power_on_after_fail", MAINBOARD_POWER_ON); |
| |
| reg8 = pci_read_config8(dev, GEN_PMCON_3); |
| reg8 &= 0xfe; |
| switch (pwr_on) { |
| case MAINBOARD_POWER_OFF: |
| reg8 |= 1; |
| state = "off"; |
| break; |
| case MAINBOARD_POWER_ON: |
| reg8 &= ~1; |
| state = "on"; |
| break; |
| case MAINBOARD_POWER_KEEP: |
| reg8 &= ~1; |
| state = "state keep"; |
| break; |
| default: |
| state = "undefined"; |
| } |
| |
| reg8 &= ~(1 << 3); /* minimum assertion is 1 to 2 RTCCLK */ |
| |
| pci_write_config8(dev, GEN_PMCON_3, reg8); |
| printk(BIOS_INFO, "Set power %s after power failure.\n", state); |
| |
| /* Set up NMI on errors. */ |
| reg8 = inb(0x61); |
| reg8 &= 0x0f; /* Higher Nibble must be 0 */ |
| reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */ |
| // reg8 &= ~(1 << 2); /* PCI SERR# Enable */ |
| reg8 |= (1 << 2); /* PCI SERR# Disable for now */ |
| outb(reg8, 0x61); |
| |
| reg8 = inb(0x70); |
| const unsigned int nmi_option = get_uint_option("nmi", NMI_OFF); |
| if (nmi_option) { |
| printk(BIOS_INFO, "NMI sources enabled.\n"); |
| reg8 &= ~(1 << 7); /* Set NMI. */ |
| } else { |
| printk(BIOS_INFO, "NMI sources disabled.\n"); |
| reg8 |= (1 << 7); /* Disable NMI. */ |
| } |
| outb(reg8, 0x70); |
| |
| /* Set SMI# rate down and enable CPU_SLP# */ |
| reg16 = pci_read_config16(dev, GEN_PMCON_1); |
| reg16 &= ~(3 << 0); // SMI# rate 1 minute |
| reg16 |= (1 << 5); // CPUSLP_EN Desktop only |
| pci_write_config16(dev, GEN_PMCON_1, reg16); |
| |
| pmbase = pci_read_config16(dev, 0x40) & 0xfffe; |
| |
| /* Set up power management block and determine sleep mode */ |
| reg32 = inl(pmbase + 0x04); // PM1_CNT |
| |
| reg32 &= ~(7 << 10); // SLP_TYP |
| reg32 |= (1 << 0); // SCI_EN |
| outl(reg32, pmbase + 0x04); |
| } |
| |
| |
| static void i82801dx_rtc_init(struct device *dev) |
| { |
| u8 reg8; |
| u32 reg32; |
| int rtc_failed; |
| |
| reg8 = pci_read_config8(dev, GEN_PMCON_3); |
| rtc_failed = reg8 & RTC_BATTERY_DEAD; |
| if (rtc_failed) { |
| reg8 &= ~(1 << 1); /* Preserve the power fail state. */ |
| pci_write_config8(dev, GEN_PMCON_3, reg8); |
| } |
| reg32 = pci_read_config32(dev, GEN_STS); |
| rtc_failed |= reg32 & (1 << 2); |
| cmos_init(rtc_failed); |
| |
| /* Enable access to the upper 128 byte bank of CMOS RAM. */ |
| pci_write_config8(dev, RTC_CONF, 0x04); |
| } |
| |
| static void i82801dx_set_acpi_mode(struct device *dev) |
| { |
| if (!acpi_is_wakeup_s3()) { |
| apm_control(APM_CNT_ACPI_DISABLE); |
| } else { |
| apm_control(APM_CNT_ACPI_ENABLE); |
| } |
| } |
| |
| static void i82801dx_lpc_route_dma(struct device *dev, u8 mask) |
| { |
| u16 reg16; |
| int i; |
| |
| reg16 = pci_read_config16(dev, PCI_DMA_CFG); |
| reg16 &= 0x300; |
| for (i = 0; i < 8; i++) { |
| if (i == 4) |
| continue; |
| reg16 |= ((mask & (1 << i)) ? 3 : 1) << (i * 2); |
| } |
| pci_write_config16(dev, PCI_DMA_CFG, reg16); |
| } |
| |
| /* ICH4 does not mention HPET in the docs, but |
| * all ICH3 and ICH4 do have HPETs built in. |
| */ |
| static void enable_hpet(struct device *dev) |
| { |
| u32 reg32, hpet, val; |
| |
| /* Set HPET base address and enable it */ |
| printk(BIOS_DEBUG, "Enabling HPET at 0x%x\n", HPET_BASE_ADDRESS); |
| reg32 = pci_read_config32(dev, GEN_CNTL); |
| /* |
| * Bit 17 is HPET enable bit. |
| * Bit 16:15 control the HPET base address. |
| */ |
| reg32 &= ~(3 << 15); /* Clear it */ |
| |
| hpet = HPET_BASE_ADDRESS >> 12; |
| hpet &= 0x3; |
| |
| reg32 |= (hpet << 15); |
| reg32 |= (1 << 17); /* Enable HPET. */ |
| pci_write_config32(dev, GEN_CNTL, reg32); |
| |
| /* Check to see whether it took */ |
| reg32 = pci_read_config32(dev, GEN_CNTL); |
| val = reg32 >> 15; |
| val &= 0x7; |
| |
| if ((val & 0x4) && (hpet == (val & 0x3))) { |
| printk(BIOS_INFO, "HPET enabled at 0x%x\n", HPET_BASE_ADDRESS); |
| } else { |
| printk(BIOS_WARNING, "HPET was not enabled correctly\n"); |
| reg32 &= ~(1 << 17); /* Clear Enable */ |
| pci_write_config32(dev, GEN_CNTL, reg32); |
| } |
| } |
| |
| static void lpc_init(struct device *dev) |
| { |
| /* IO APIC initialization. */ |
| i82801dx_enable_ioapic(dev); |
| |
| i82801dx_enable_serial_irqs(dev); |
| |
| /* Setup the PIRQ. */ |
| i82801dx_pirq_init(dev); |
| |
| /* Setup power options. */ |
| i82801dx_power_options(dev); |
| |
| /* Initialize the real time clock. */ |
| i82801dx_rtc_init(dev); |
| |
| /* Route DMA. */ |
| i82801dx_lpc_route_dma(dev, 0xff); |
| |
| /* Initialize ISA DMA. */ |
| isa_dma_init(); |
| |
| /* Initialize the High Precision Event Timers */ |
| enable_hpet(dev); |
| |
| setup_i8259(); |
| |
| i82801dx_set_acpi_mode(dev); |
| } |
| |
| static void i82801dx_lpc_read_resources(struct device *dev) |
| { |
| struct resource *res; |
| |
| /* Get the normal PCI resources of this device. */ |
| pci_dev_read_resources(dev); |
| |
| /* Add an extra subtractive resource for both memory and I/O. */ |
| res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); |
| res->base = 0; |
| res->size = 0x1000; |
| res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | |
| IORESOURCE_ASSIGNED | IORESOURCE_FIXED; |
| |
| res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); |
| res->base = 0xff800000; |
| res->size = 0x00800000; /* 8 MB for flash */ |
| res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | |
| IORESOURCE_ASSIGNED | IORESOURCE_FIXED; |
| |
| res = new_resource(dev, 3); /* IOAPIC */ |
| res->base = IO_APIC_ADDR; |
| res->size = 0x00001000; |
| res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; |
| } |
| |
| static struct device_operations lpc_ops = { |
| .read_resources = i82801dx_lpc_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = lpc_init, |
| .scan_bus = scan_static_bus, |
| .enable = i82801dx_enable, |
| }; |
| |
| /* 82801DB/DBL */ |
| static const struct pci_driver lpc_driver_db __pci_driver = { |
| .ops = &lpc_ops, |
| .vendor = PCI_VID_INTEL, |
| .device = PCI_DID_INTEL_82801DB_LPC, |
| }; |
| |
| /* 82801DBM */ |
| static const struct pci_driver lpc_driver_dbm __pci_driver = { |
| .ops = &lpc_ops, |
| .vendor = PCI_VID_INTEL, |
| .device = PCI_DID_INTEL_82801DBM_LPC, |
| }; |