diff options
Diffstat (limited to 'src/southbridge/broadcom/bcm5785/early_smbus.c')
-rw-r--r-- | src/southbridge/broadcom/bcm5785/early_smbus.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/southbridge/broadcom/bcm5785/early_smbus.c b/src/southbridge/broadcom/bcm5785/early_smbus.c new file mode 100644 index 0000000000..f235e58888 --- /dev/null +++ b/src/southbridge/broadcom/bcm5785/early_smbus.c @@ -0,0 +1,61 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2005 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; 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 "smbus.h" + +#define SMBUS_IO_BASE 0x1000 + +static void enable_smbus(void) +{ + device_t dev; + dev = pci_locate_device(PCI_ID(0x1166, 0x0205), 0); // 0x0201? + + if (dev == PCI_DEV_INVALID) { + die("SMBUS controller not found\n"); + } + + print_debug("SMBus controller enabled\n"); + /* set smbus iobase */ + pci_write_config32(dev, 0x90, SMBUS_IO_BASE | 1); + /* Set smbus iospace enable */ + pci_write_config8(dev, 0xd2, 0x03); + /* clear any lingering errors, so the transaction will run */ + outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT); +} + +static inline int smbus_recv_byte(unsigned device) +{ + return do_smbus_recv_byte(SMBUS_IO_BASE, device); +} + +static inline int smbus_send_byte(unsigned device, unsigned char val) +{ + return do_smbus_send_byte(SMBUS_IO_BASE, device, val); +} + +static inline int smbus_read_byte(unsigned device, unsigned address) +{ + return do_smbus_read_byte(SMBUS_IO_BASE, device, address); +} + +static inline int smbus_write_byte(unsigned device, unsigned address, unsigned char val) +{ + return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val); +} |