/* * This file is part of the coreboot project. * * Copyright (C) 2008-2009 coresystems GmbH * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include "i82801gx.h" #include #define NMI_OFF 0 #define ENABLE_ACPI_MODE_IN_COREBOOT 0 #define TEST_SMM_FLASH_LOCKDOWN 0 typedef struct southbridge_intel_i82801gx_config config_t; static void i82801gx_enable_apic(struct device *dev) { int i; u32 reg32; volatile u32 *ioapic_index = (volatile u32 *)(IO_APIC_ADDR); volatile u32 *ioapic_data = (volatile u32 *)(IO_APIC_ADDR + 0x10); /* Enable ACPI I/O and power management. * Set SCI IRQ to IRQ9 */ pci_write_config8(dev, ACPI_CNTL, 0x80); *ioapic_index = 0; *ioapic_data = (1 << 25); *ioapic_index = 0; reg32 = *ioapic_data; printk(BIOS_DEBUG, "Southbridge APIC ID = %x\n", (reg32 >> 24) & 0x0f); if (reg32 != (1 << 25)) die("APIC Error\n"); printk(BIOS_SPEW, "Dumping IOAPIC registers\n"); for (i=0; i<3; i++) { *ioapic_index = i; printk(BIOS_SPEW, " reg 0x%04x:", i); reg32 = *ioapic_data; printk(BIOS_SPEW, " 0x%08x\n", reg32); } *ioapic_index = 3; /* Select Boot Configuration register. */ *ioapic_data = 1; /* Use Processor System Bus to deliver interrupts. */ } static void i82801gx_enable_serial_irqs(struct device *dev) { /* Set packet length and toggle silent mode bit for one frame. */ pci_write_config8(dev, SERIRQ_CNTL, (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0)); } /* 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. */ static void i82801gx_pirq_init(device_t dev) { device_t irq_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); /* Eric Biederman once said we should let the OS do this. * I am not so sure anymore he was right. */ 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 i82801gx_gpi_routing(device_t dev) { /* Get the chip configuration */ config_t *config = dev->chip_info; u32 reg32 = 0; /* An array would be much nicer here, or some * other method of doing this. */ reg32 |= (config->gpi0_routing & 0x03) << 0; reg32 |= (config->gpi1_routing & 0x03) << 2; reg32 |= (config->gpi2_routing & 0x03) << 4; reg32 |= (config->gpi3_routing & 0x03) << 6; reg32 |= (config->gpi4_routing & 0x03) << 8; reg32 |= (config->gpi5_routing & 0x03) << 10; reg32 |= (config->gpi6_routing & 0x03) << 12; reg32 |= (config->gpi7_routing & 0x03) << 14; reg32 |= (config->gpi8_routing & 0x03) << 16; reg32 |= (config->gpi9_routing & 0x03) << 18; reg32 |= (config->gpi10_routing & 0x03) << 20; reg32 |= (config->gpi11_routing & 0x03) << 22; reg32 |= (config->gpi12_routing & 0x03) << 24; reg32 |= (config->gpi13_routing & 0x03) << 26; reg32 |= (config->gpi14_routing & 0x03) << 28; reg32 |= (config->gpi15_routing & 0x03) << 30; pci_write_config32(dev, 0xb8, reg32); } static void i82801gx_power_options(device_t dev) { u8 reg8; u16 reg16, pmbase; u32 reg32; const char *state; /* Get the chip configuration */ config_t *config = dev->chip_info; int pwr_on=CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL; int nmi_option; /* 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. */ if (get_option(&pwr_on, "power_on_after_fail") < 0) pwr_on = 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 |= (3 << 4); /* avoid #S4 assertions */ reg8 &= ~(1 << 3); /* minimum asssertion 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); nmi_option = NMI_OFF; get_option(&nmi_option, "nmi"); 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); /* Can't mask NMI from PCI-E and NMI_NOW */ } outb(reg8, 0x70); /* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */ reg16 = pci_read_config16(dev, GEN_PMCON_1); reg16 &= ~(3 << 0); // SMI# rate 1 minute reg16 |= (1 << 2); // CLKRUN_EN - Mobile/Ultra only reg16 |= (1 << 3); // Speedstep Enable - Mobile/Ultra only reg16 |= (1 << 5); // CPUSLP_EN Desktop only // another laptop wants this? // reg16 &= ~(1 << 10); // BIOS_PCI_EXP_EN - Desktop/Mobile only reg16 |= (1 << 10); // BIOS_PCI_EXP_EN - Desktop/Mobile only #if DEBUG_PERIODIC_SMIS /* Set DEBUG_PERIODIC_SMIS in i82801gx.h to debug using * periodic SMIs. */ reg16 |= (3 << 0); // Periodic SMI every 8s #endif pci_write_config16(dev, GEN_PMCON_1, reg16); // Set the board's GPI routing. i82801gx_gpi_routing(dev); pmbase = pci_read_config16(dev, 0x40) & 0xfffe; outl(config->gpe0_en, pmbase + GPE0_EN); outw(config->alt_gp_smi_en, pmbase + ALT_GP_SMI_EN); /* Set up power management block and determine sleep mode */ reg32 = inl(pmbase + 0x04); // PM1_CNT reg32 &= ~(7 << 10); // SLP_TYP reg32 |= (1 << 1); // enable C3->C0 transition on bus master reg32 |= (1 << 0); // SCI_EN outl(reg32, pmbase + 0x04); } static void i82801gx_configure_cstates(device_t dev) { u8 reg8; reg8 = pci_read_config8(dev, 0xa9); // Cx state configuration reg8 |= (1 << 4) | (1 << 3) | (1 << 2); // Enable Popup & Popdown pci_write_config8(dev, 0xa9, reg8); // Set Deeper Sleep configuration to recommended values reg8 = pci_read_config8(dev, 0xaa); reg8 &= 0xf0; reg8 |= (2 << 2); // Deeper Sleep to Stop CPU: 34-40us reg8 |= (2 << 0); // Deeper Sleep to Sleep: 15us pci_write_config8(dev, 0xaa, reg8); } static void i82801gx_rtc_init(struct device *dev) { u8 reg8; int rtc_failed; reg8 = pci_read_config8(dev, GEN_PMCON_3); rtc_failed = reg8 & RTC_BATTERY_DEAD; if (rtc_failed) { reg8 &= ~RTC_BATTERY_DEAD; pci_write_config8(dev, GEN_PMCON_3, reg8); } printk(BIOS_DEBUG, "rtc_failed = 0x%x\n", rtc_failed); rtc_init(rtc_failed); } static void enable_hpet(void) { u32 reg32; /* Move HPET to default address 0xfed00000 and enable it */ reg32 = RCBA32(HPTC); reg32 |= (1 << 7); // HPET Address Enable reg32 &= ~(3 << 0); RCBA32(HPTC) = reg32; } static void enable_clock_gating(void) { u32 reg32; /* Enable Clock Gating for most devices */ reg32 = RCBA32(CG); reg32 |= (1 << 31); // LPC clock gating reg32 |= (1 << 30); // PATA clock gating // SATA clock gating reg32 |= (1 << 27) | (1 << 26) | (1 << 25) | (1 << 24); reg32 |= (1 << 23); // AC97 clock gating reg32 |= (1 << 19); // USB EHCI clock gating reg32 |= (1 << 3) | (1 << 1); // DMI clock gating reg32 |= (1 << 2); // PCIe clock gating; reg32 &= ~(1 << 20); // No static clock gating for USB reg32 &= ~( (1 << 29) | (1 << 28) ); // Disable UHCI clock gating RCBA32(CG) = reg32; } #if CONFIG_HAVE_SMI_HANDLER static void i82801gx_lock_smm(struct device *dev) { #if TEST_SMM_FLASH_LOCKDOWN u8 reg8; #endif if (acpi_slp_type != 3) { #if ENABLE_ACPI_MODE_IN_COREBOOT printk(BIOS_DEBUG, "Enabling ACPI via APMC:\n"); outb(APM_CNT_ACPI_ENABLE, APM_CNT); // Enable ACPI mode printk(BIOS_DEBUG, "done.\n"); #else printk(BIOS_DEBUG, "Disabling ACPI via APMC:\n"); outb(APM_CNT_ACPI_DISABLE, APM_CNT); // Disable ACPI mode printk(BIOS_DEBUG, "done.\n"); #endif } else { printk(BIOS_DEBUG, "S3 wakeup, enabling ACPI via APMC\n"); outb(APM_CNT_ACPI_ENABLE, APM_CNT); } /* Don't allow evil boot loaders, kernels, or * userspace applications to deceive us: */ smm_lock(); #if TEST_SMM_FLASH_LOCKDOWN /* Now try this: */ printk(BIOS_DEBUG, "Locking BIOS to RO... "); reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ printk(BIOS_DEBUG, " BLE: %s; BWE: %s\n", (reg8&2)?"on":"off", (reg8&1)?"rw":"ro"); reg8 &= ~(1 << 0); /* clear BIOSWE */ pci_write_config8(dev, 0xdc, reg8); reg8 |= (1 << 1); /* set BLE */ pci_write_config8(dev, 0xdc, reg8); printk(BIOS_DEBUG, "ok.\n"); reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ printk(BIOS_DEBUG, " BLE: %s; BWE: %s\n", (reg8&2)?"on":"off", (reg8&1)?"rw":"ro"); printk(BIOS_DEBUG, "Writing:\n"); *(volatile u8 *)0xfff00000 = 0x00; printk(BIOS_DEBUG, "Testing:\n"); reg8 |= (1 << 0); /* set BIOSWE */ pci_write_config8(dev, 0xdc, reg8); reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ printk(BIOS_DEBUG, " BLE: %s; BWE: %s\n", (reg8&2)?"on":"off", (reg8&1)?"rw":"ro"); printk(BIOS_DEBUG, "Done.\n"); #endif } #endif #define SPIBASE 0x3020 static void i82801gx_spi_init(void) { u16 spicontrol; spicontrol = RCBA16(SPIBASE + 2); spicontrol &= ~(1 << 0); // SPI Access Request RCBA16(SPIBASE + 2) = spicontrol; } static void i82801gx_fixups(struct device *dev) { /* This needs to happen after PCI enumeration */ RCBA32(0x1d40) |= 1; /* USB Transient Disconnect Detect: * Prevent a SE0 condition on the USB ports from being * interpreted by the UHCI controller as a disconnect */ pci_write_config8(dev, 0xad, 0x3); } static void lpc_init(struct device *dev) { printk(BIOS_DEBUG, "i82801gx: lpc_init\n"); /* Set the value for PCI command register. */ pci_write_config16(dev, PCI_COMMAND, 0x000f); /* IO APIC initialization. */ i82801gx_enable_apic(dev); i82801gx_enable_serial_irqs(dev); /* Setup the PIRQ. */ i82801gx_pirq_init(dev); /* Setup power options. */ i82801gx_power_options(dev); /* Configure Cx state registers */ i82801gx_configure_cstates(dev); /* Set the state of the GPIO lines. */ //gpio_init(dev); /* Initialize the real time clock. */ i82801gx_rtc_init(dev); /* Initialize ISA DMA. */ isa_dma_init(); /* Initialize the High Precision Event Timers, if present. */ enable_hpet(); /* Initialize Clock Gating */ enable_clock_gating(); setup_i8259(); /* The OS should do this? */ /* Interrupt 9 should be level triggered (SCI) */ i8259_configure_irq_trigger(9, 1); #if CONFIG_HAVE_SMI_HANDLER i82801gx_lock_smm(dev); #endif i82801gx_spi_init(); i82801gx_fixups(dev); } static void i82801gx_lpc_read_resources(device_t 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 void set_subsystem(device_t dev, unsigned vendor, unsigned device) { if (!vendor || !device) { pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, pci_read_config32(dev, PCI_VENDOR_ID)); } else { pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, ((device & 0xffff) << 16) | (vendor & 0xffff)); } } static struct pci_operations pci_ops = { .set_subsystem = set_subsystem, }; static struct device_operations device_ops = { .read_resources = i82801gx_lpc_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = lpc_init, .scan_bus = scan_static_bus, .enable = i82801gx_enable, .ops_pci = &pci_ops, }; /* 82801GH (ICH7 DH) */ static const struct pci_driver ich7_dh_lpc __pci_driver = { .ops = &device_ops, .vendor = PCI_VENDOR_ID_INTEL, .device = 0x27b0, }; /* 82801GB/GR (ICH7/ICH7R) */ static const struct pci_driver ich7_ich7r_lpc __pci_driver = { .ops = &device_ops, .vendor = PCI_VENDOR_ID_INTEL, .device = 0x27b8, }; /* 82801GBM/GU (ICH7-M/ICH7-U) */ static const struct pci_driver ich7m_ich7u_lpc __pci_driver = { .ops = &device_ops, .vendor = PCI_VENDOR_ID_INTEL, .device = 0x27b9, }; /* 82801GHM (ICH7-M DH) */ static const struct pci_driver ich7m_dh_lpc __pci_driver = { .ops = &device_ops, .vendor = PCI_VENDOR_ID_INTEL, .device = 0x27bd, };