1 files changed, 47 insertions, 0 deletions
diff --git a/src/include/gpiolib.h b/src/include/gpiolib.h
new file mode 100644
index 0000000000..daec3b66bd
--- /dev/null
+++ b/src/include/gpiolib.h
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * 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
+ */
+
+#ifndef __SRC_INCLUDE_GPIOLIB_H__
+#define __SRC_INCLUDE_GPIOLIB_H__
+
+/* A generic type, use accessor macros to actually access the hardware. */
+typedef unsigned gpio_t;
+
+/*
+ * Read the value presented by the set of GPIOs, when each pin is interpreted
+ * as a number in 0..2 range depending on the external pullup situation.
+ *
+ * Depending on the third parameter, the return value is either a set of two
+ * bit fields, each representing one GPIO value, or a number where each GPIO is
+ * included multiplied by 3^gpio_num, resulting in a true tertiary value.
+ *
+ */
+int gpio_board_id(gpio_t gpio[], int num_gpio, int tertiary);
+
+/*
+ * The following functions are not provided by the common library, but must be
+ * implemented by the appropriate SOC/board instead.
+ */
+int gpio_get_in_value(gpio_t gpio);
+void gpio_set_out_value(gpio_t gpio, int value);
+void gpio_input_pulldown(gpio_t gpio);
+void gpio_input_pullup(gpio_t gpio);
+void gpio_input(gpio_t gpio);
+
+#endif