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-rw-r--r--src/include/device/smbus_host.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/src/include/device/smbus_host.h b/src/include/device/smbus_host.h
new file mode 100644
index 0000000000..2aa160ffbd
--- /dev/null
+++ b/src/include/device/smbus_host.h
@@ -0,0 +1,35 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * 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.
+ */
+
+#ifndef __DEVICE_SMBUS_HOST_H__
+#define __DEVICE_SMBUS_HOST_H__
+
+#include <stdint.h>
+
+/* Low-level SMBUS host controller. */
+
+int do_smbus_recv_byte(uintptr_t base, u8 device);
+int do_smbus_send_byte(uintptr_t base, u8 device, u8 val);
+int do_smbus_read_byte(uintptr_t base, u8 device, u8 address);
+int do_smbus_write_byte(uintptr_t base, u8 device, u8 address, u8 data);
+int do_smbus_read_word(uintptr_t base, u8 device, u8 address);
+int do_smbus_write_word(uintptr_t base, u8 device, u8 address, u16 data);
+
+int do_smbus_block_read(uintptr_t base, u8 device, u8 cmd, size_t max_bytes, u8 *buf);
+int do_smbus_block_write(uintptr_t base, u8 device, u8 cmd, size_t bytes, const u8 *buf);
+
+/* For Intel, implemented since ICH5. */
+int do_i2c_eeprom_read(uintptr_t base, u8 device, u8 offset, size_t bytes, u8 *buf);
+int do_i2c_block_write(uintptr_t base, u8 device, size_t bytes, u8 *buf);
+
+#endif