diff options
Diffstat (limited to 'src/southbridge/amd/agesa/hudson/lpc.c')
-rw-r--r-- | src/southbridge/amd/agesa/hudson/lpc.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/southbridge/amd/agesa/hudson/lpc.c b/src/southbridge/amd/agesa/hudson/lpc.c new file mode 100644 index 0000000000..4dd6083b1e --- /dev/null +++ b/src/southbridge/amd/agesa/hudson/lpc.c @@ -0,0 +1,148 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2010 Advanced Micro Devices, Inc. + * + * 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 <console/console.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pnp.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> +#include <pc80/mc146818rtc.h> +#include <pc80/isa-dma.h> +#include <bitops.h> +#include <arch/io.h> +#include "hudson.h" + +static void lpc_init(device_t dev) +{ + u8 byte; + u32 dword; + device_t sm_dev; + + /* Enable the LPC Controller */ + sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0)); + dword = pci_read_config32(sm_dev, 0x64); + dword |= 1 << 20; + pci_write_config32(sm_dev, 0x64, dword); + + /* Initialize isa dma */ + isa_dma_init(); + + /* Enable DMA transaction on the LPC bus */ + byte = pci_read_config8(dev, 0x40); + byte |= (1 << 2); + pci_write_config8(dev, 0x40, byte); + + /* Disable the timeout mechanism on LPC */ + byte = pci_read_config8(dev, 0x48); + byte &= ~(1 << 7); + pci_write_config8(dev, 0x48, byte); + + /* Disable LPC MSI Capability */ + byte = pci_read_config8(dev, 0x78); + byte &= ~(1 << 1); + byte &= ~(1 << 0); /* Keep the old way. i.e., when bus master/DMA cycle is going + on on LPC, it holds PCI grant, so no LPC slave cycle can + interrupt and visit LPC. */ + pci_write_config8(dev, 0x78, byte); + + /* bit0: Enable prefetch a cacheline (64 bytes) when Host reads code from SPI rom */ + /* bit3: Fix SPI_CS# timing issue when running at 66M. TODO:A12. */ + byte = pci_read_config8(dev, 0xBB); + byte |= 1 << 0 | 1 << 3; + pci_write_config8(dev, 0xBB, byte); +} + +static void hudson_lpc_read_resources(device_t dev) +{ + struct resource *res; + + /* Get the normal pci resources of this device */ + pci_dev_read_resources(dev); /* We got one for APIC, or one more for TRAP */ + + pci_get_resource(dev, 0xA0); /* SPI ROM base address */ + + /* 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 = 0xfec00000; + //res->size = 0x00001000; + //res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; + + compact_resources(dev); +} + +static void hudson_lpc_set_resources(struct device *dev) +{ + struct resource *res; + + pci_dev_set_resources(dev); + + /* Specical case. SPI Base Address. The SpiRomEnable should be set. */ + res = find_resource(dev, 0xA0); + pci_write_config32(dev, 0xA0, res->base | 1 << 1); + +} + +/** + * @brief Enable resources for children devices + * + * @param dev the device whos children's resources are to be enabled + * + */ +static void hudson_lpc_enable_childrens_resources(device_t dev) +{ + printk(BIOS_DEBUG, "hudson_lpc_enable_childrens_resources\n"); + +} + +static void hudson_lpc_enable_resources(device_t dev) +{ + pci_dev_enable_resources(dev); + hudson_lpc_enable_childrens_resources(dev); +} + +static struct pci_operations lops_pci = { + .set_subsystem = pci_dev_set_subsystem, +}; + +static struct device_operations lpc_ops = { + .read_resources = hudson_lpc_read_resources, + .set_resources = hudson_lpc_set_resources, + .enable_resources = hudson_lpc_enable_resources, + .init = lpc_init, + .scan_bus = scan_static_bus, + .ops_pci = &lops_pci, +}; +static const struct pci_driver lpc_driver __pci_driver = { + .ops = &lpc_ops, + .vendor = PCI_VENDOR_ID_AMD, + .device = PCI_DEVICE_ID_ATI_SB900_LPC, +}; |