Add support for ENE932 EC w/ Compal firmware

Change-Id: I19b03139e7edfee6ff3e0bcef735bb36bfadc354
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2024
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/src/ec/compal/ene932/ec.h b/src/ec/compal/ene932/ec.h
new file mode 100644
index 0000000000..879925f539
--- /dev/null
+++ b/src/ec/compal/ene932/ec.h
@@ -0,0 +1,56 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 The Chromium OS Authors. All rights reserved.
+ *
+ * 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
+ */
+
+/*
+ * EC communication interface for COMPAL ENE932 Embedded Controller.
+ */
+
+#ifndef _EC_COMPAL_ENE932_EC_H
+#define _EC_COMPAL_ENE932_EC_H
+
+#define EC_IO 0xfd60 /* Mainboard specific. Could be Kconfig option */
+#define EC_IO_HIGH EC_IO + 1
+#define EC_IO_LOW  EC_IO + 2
+#define EC_IO_DATA EC_IO + 3
+
+/* ENE EC internal address space */
+#define REG_SPI_DATA    0xfeab
+#define REG_SPI_COMMAND 0xfeac
+#define REG_SPI_CONFIG  0xfead
+#define CFG_CSn_FORCE_LOW        (1 << 4)
+#define CFG_COMMAND_WRITE_ENABLE (1 << 3)
+#define CFG_STATUS               (1 << 1)
+
+
+#define KBD_DATA	0x60
+#define KBD_COMMAND	0x64
+#define KBD_STATUS	0x64
+#define   KBD_IBF	(1 << 1) // 1: input buffer full (data ready for ec)
+#define   KBD_OBF	(1 << 0) // 1: output buffer full (data ready for host)
+
+
+/* Wait 400ms for keyboard controller answers */
+#define KBC_TIMEOUT_IN_MS 400
+
+u8 ec_kbc_read_ob(void);
+void ec_kbc_write_cmd(u8 cmd);
+void ec_kbc_write_ib(u8 data);
+int kbc_cleanup_buffers(void);
+
+#endif /* _EC_COMPAL_ENE932_EC_H */