/* * This file is part of the coreboot project. * * Copyright (C) 2003 Linux Networx * Copyright (C) 2003 SuSE Linux AG * Copyright (C) 2004 Tyan Computer * Written by Yinghai Lu for Tyan Computer. * Copyright (C) 2006,2007 AMD * Written by Yinghai Lu for AMD. * * 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; either version 2 of the License, or * (at your option) any later version. * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mcp55.h" #define NMI_OFF 0 // 0x7a or e3 #define PREVIOUS_POWER_STATE 0x7A #define MAINBOARD_POWER_OFF 0 #define MAINBOARD_POWER_ON 1 #define SLOW_CPU_OFF 0 #define SLOW_CPU__ON 1 static void lpc_common_init(struct device *dev, int master) { u8 byte; void *ioapic_base; /* IOAPIC initialization. */ byte = pci_read_config8(dev, 0x74); byte |= (1 << 0); /* Enable IOAPIC. */ pci_write_config8(dev, 0x74, byte); ioapic_base = (void *)pci_read_config32(dev, PCI_BASE_ADDRESS_1); /* 0x14 */ if (master) setup_ioapic(ioapic_base, 0); else clear_ioapic(ioapic_base); } static void lpc_slave_init(struct device *dev) { lpc_common_init(dev, 0); } static void enable_hpet(struct device *dev) { unsigned long hpet_address; pci_write_config32(dev, 0x44, CONFIG_HPET_ADDRESS|1); hpet_address=pci_read_config32(dev, 0x44) & 0xfffffffe; printk(BIOS_DEBUG, "enabling HPET @0x%lx\n", hpet_address); } static void lpc_init(struct device *dev) { u8 byte, byte_old; int on, nmi_option; lpc_common_init(dev, 1); /* power after power fail */ #if 1 on = CONFIG_MAINBOARD_POWER_FAILURE_STATE; get_option(&on, "power_on_after_fail"); byte = pci_read_config8(dev, PREVIOUS_POWER_STATE); byte &= ~0x40; if (!on) byte |= 0x40; pci_write_config8(dev, PREVIOUS_POWER_STATE, byte); printk(BIOS_INFO, "set power %s after power fail\n", on ? "on" : "off"); #endif /* Throttle the CPU speed down for testing. */ on = SLOW_CPU_OFF; get_option(&on, "slow_cpu"); if (on) { u16 pm10_bar; pm10_bar = (pci_read_config16(dev, 0x60) & 0xff00); outl(((on << 1) + 0x10), (pm10_bar + 0x10)); inl(pm10_bar + 0x10); on = 8 - on; printk(BIOS_DEBUG, "Throttling CPU %2d.%1.1d percent.\n", (on * 12) + (on >> 1), (on & 1) * 5); } /* Enable error reporting. */ /* Set up sync flood detected. */ byte = pci_read_config8(dev, 0x47); byte |= (1 << 1); pci_write_config8(dev, 0x47, byte); /* Set up NMI on errors. */ byte = inb(0x70); /* RTC70 */ byte_old = byte; nmi_option = NMI_OFF; get_option(&nmi_option, "nmi"); if (nmi_option) byte &= ~(1 << 7); /* Set NMI. */ else byte |= (1 << 7); /* Can't mask NMI from PCI-E and NMI_NOW. */ if (byte != byte_old) outb(byte, 0x70); /* Initialize the real time clock. */ cmos_init(0); /* Initialize ISA DMA. */ isa_dma_init(); /* Initialize the High Precision Event Timers (HPET). */ enable_hpet(dev); } static void mcp55_lpc_read_resources(struct device *dev) { struct resource *res; /* Get the normal PCI resources of this device. */ /* We got one for APIC, or one more for TRAP. */ 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; } /** * Enable resources for children devices. * * @param dev The device whose children's resources are to be enabled. */ static void mcp55_lpc_enable_childrens_resources(struct device *dev) { u32 reg, reg_var[4]; int i, var_num = 0; struct bus *link; reg = pci_read_config32(dev, 0xa0); for (link = dev->link_list; link; link = link->next) { struct device *child; for (child = link->children; child; child = child->sibling) { if (child->enabled && (child->path.type == DEVICE_PATH_PNP)) { struct resource *res; for (res = child->resource_list; res; res = res->next) { unsigned long base, end; /* Don't need long long. */ if (!(res->flags & IORESOURCE_IO)) continue; base = res->base; end = resource_end(res); printk(BIOS_DEBUG, "mcp55 lpc decode:%s, base=0x%08lx, end=0x%08lx\n",dev_path(child),base, end); switch (base) { case 0x3f8: /* COM1 */ reg |= (1 << 0); break; case 0x2f8: /* COM2 */ reg |= (1 << 1); break; case 0x378: /* Parallel 1 */ reg |= (1 << 24); break; case 0x3f0: /* FD0 */ reg |= (1 << 20); break; case 0x220: /* Audio 0 */ reg |= (1 << 8); break; case 0x300: /* Midi 0 */ reg |= (1 << 12); break; } if ((base == 0x290) || (base >= 0x400)) { /* Only 4 var; compact them? */ if (var_num >= 4) continue; reg |= (1 << (28 + var_num)); reg_var[var_num++] = (base & 0xffff) | ((end & 0xffff) << 16); } } } } } pci_write_config32(dev, 0xa0, reg); for (i = 0; i < var_num; i++) pci_write_config32(dev, 0xa8 + i * 4, reg_var[i]); } static void mcp55_lpc_enable_resources(struct device *dev) { pci_dev_enable_resources(dev); mcp55_lpc_enable_childrens_resources(dev); } #if CONFIG(HAVE_ACPI_TABLES) static void southbridge_acpi_fill_ssdt_generator(struct device *device) { amd_generate_powernow(0, 0, 0); } #endif static struct device_operations lpc_ops = { .read_resources = mcp55_lpc_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = mcp55_lpc_enable_resources, #if CONFIG(HAVE_ACPI_TABLES) .acpi_fill_ssdt_generator = southbridge_acpi_fill_ssdt_generator, .write_acpi_tables = acpi_write_hpet, #endif .init = lpc_init, .scan_bus = scan_lpc_bus, .ops_pci = &mcp55_pci_ops, }; static const unsigned short lpc_ids[] = { PCI_DEVICE_ID_NVIDIA_MCP55_LPC, PCI_DEVICE_ID_NVIDIA_MCP55_PRO, PCI_DEVICE_ID_NVIDIA_MCP55_LPC_2, PCI_DEVICE_ID_NVIDIA_MCP55_LPC_3, PCI_DEVICE_ID_NVIDIA_MCP55_LPC_4, PCI_DEVICE_ID_NVIDIA_MCP55_LPC_5, PCI_DEVICE_ID_NVIDIA_MCP55_LPC_6, 0 }; static const struct pci_driver lpc_driver __pci_driver = { .ops = &lpc_ops, .vendor = PCI_VENDOR_ID_NVIDIA, .devices = lpc_ids, }; static struct device_operations lpc_slave_ops = { .read_resources = mcp55_lpc_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, #if CONFIG(HAVE_ACPI_TABLES) .write_acpi_tables = acpi_write_hpet, #endif .init = lpc_slave_init, .ops_pci = &mcp55_pci_ops, }; static const struct pci_driver lpc_driver_slave __pci_driver = { .ops = &lpc_slave_ops, .vendor = PCI_VENDOR_ID_NVIDIA, .device = PCI_DEVICE_ID_NVIDIA_MCP55_SLAVE, };