diff options
author | Richard Smith <smithbone@gmail.com> | 2006-07-24 04:25:47 +0000 |
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committer | Richard Smith <smithbone@gmail.com> | 2006-07-24 04:25:47 +0000 |
commit | cb8eab482ff09ec256456312ef2d6e7710123551 (patch) | |
tree | 7bc1297911194e564b967efba4a03c4dde5f7a13 /src/southbridge/intel/i440bx/i440bx_early_smbus.c | |
parent | 4788effb045ae1f71d89c78a0b16a93d5ba79e89 (diff) |
add framework for i440bx chipset
add support for NSC pc87351 SuperIO
add Bitworks/IMS manboard config
This is a very basic framework for the i440bx chipset and the
Bitworks IMS board that uses it. Most things are
structure only.
Known issues:
- SMbus reads to the RAM SPD come back
all zero.
- dump_spd_registers() is commented out since it breaks with
the default setting of generic_dump_spd.c where it wants
2 memory controllers.
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2347 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge/intel/i440bx/i440bx_early_smbus.c')
-rw-r--r-- | src/southbridge/intel/i440bx/i440bx_early_smbus.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/southbridge/intel/i440bx/i440bx_early_smbus.c b/src/southbridge/intel/i440bx/i440bx_early_smbus.c new file mode 100644 index 0000000000..a3db7b88c0 --- /dev/null +++ b/src/southbridge/intel/i440bx/i440bx_early_smbus.c @@ -0,0 +1,45 @@ +#include "i440bx_smbus.h" + +#define SMBUS_IO_BASE 0x0f00 + +static void enable_smbus(void) +{ + device_t dev; + dev = pci_locate_device(PCI_ID(0x8086, 0x7113), 0); + if (dev == PCI_DEV_INVALID) { + die("SMBUS controller not found\r\n"); + } + uint8_t enable; + print_spew("SMBus controller enabled\r\n"); + pci_write_config32(dev, 0x90, SMBUS_IO_BASE ); + // Enable and set SMBBus + // 0x01 Interrupt to SMI# + // (0x4<<1)|1 set interrupt to IRQ9 + pci_write_config8(dev, 0xd2, (0x4<<1)|1); + + // Enable the IO space + pci_write_config16(dev, 0x04, 1); + + /* clear any lingering errors, so the transaction will run */ + outb(0x1e, SMBUS_IO_BASE + SMBGSTATUS); +} + +static int smbus_recv_byte(unsigned device) +{ + return do_smbus_recv_byte(SMBUS_IO_BASE, device); +} + +static int smbus_send_byte(unsigned device, unsigned char val) +{ + return do_smbus_send_byte(SMBUS_IO_BASE, device, val); +} + +static int smbus_read_byte(unsigned device, unsigned address) +{ + return do_smbus_read_byte(SMBUS_IO_BASE, device, address); +} + +static int smbus_write_byte(unsigned device, unsigned address, unsigned char val) +{ + return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val); +} |