diff options
Diffstat (limited to 'src/southbridge/nvidia/mcp55/enable_usbdebug.c')
| -rw-r--r-- | src/southbridge/nvidia/mcp55/enable_usbdebug.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/southbridge/nvidia/mcp55/enable_usbdebug.c b/src/southbridge/nvidia/mcp55/enable_usbdebug.c new file mode 100644 index 0000000000..2e78fa1ff6 --- /dev/null +++ b/src/southbridge/nvidia/mcp55/enable_usbdebug.c @@ -0,0 +1,55 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2004 Tyan Computer + * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer. + * Copyright (C) 2006,2007 AMD + * Written by Yinghai Lu <yinghai.lu@amd.com> 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. + * + * 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 <stdint.h> +#include <arch/io.h> +#include <arch/romcc_io.h> +#include <usbdebug.h> +#include <device/pci_def.h> +#include "mcp55.h" + +void set_debug_port(unsigned int port) +{ + u32 dword; + device_t dev = PCI_DEV(0, MCP55_DEVN_BASE + 2, 1); /* USB EHCI */ + + /* Write the port number to 0x74[15:12]. */ + dword = pci_read_config32(dev, 0x74); + dword &= ~(0xf << 12); + dword |= (port << 12); + pci_write_config32(dev, 0x74, dword); +} + +void mcp55_enable_usbdebug(unsigned int port) +{ + device_t dev = PCI_DEV(0, MCP55_DEVN_BASE + 2, 1); /* USB EHCI */ + + /* Mark the requested physical USB port (1-15) as the Debug Port. */ + set_debug_port(port); + + /* Set the EHCI BAR address. */ + pci_write_config32(dev, EHCI_BAR_INDEX, CONFIG_EHCI_BAR); + + /* Enable access to the EHCI memory space registers. */ + pci_write_config8(dev, PCI_COMMAND, PCI_COMMAND_MEMORY); +} |