Merge pull request #632 from rockchip-linux/support-for-gpio-driver-v2

rockchip/rk3399: Support the gpio driver and configure

1 files changed, 91 insertions, 0 deletions

diff --git a/plat/rockchip/common/include/plat_params.h b/plat/rockchip/common/include/plat_params.h
new file mode 100644
index 00000000..cad45353
--- /dev/null
+++ b/plat/rockchip/common/include/plat_params.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PLAT_PARAMS_H__
+#define __PLAT_PARAMS_H__
+
+#include <stdint.h>
+
+/*
+ * We defined several plat parameter structs for BL2 to pass platform related
+ * parameters to Rockchip BL31 platform code.  All plat parameters start with
+ * a common header, which has a type field to indicate the parameter type, and
+ * a next pointer points to next parameter. If the parameter is the last one in
+ * the list, next pointer will points to NULL.  After the header comes the
+ * variable-sized members that describe the parameter. The picture below shows
+ * how the parameters are kept in memory.
+ *
+ * head of list  ---> +----------------+ --+
+ *                    |      type      |   |
+ *                    +----------------+   |--> struct bl31_plat_param
+ *               +----|      next      |   |
+ *               |    +----------------+ --+
+ *               |    | parameter data |
+ *               |    +----------------+
+ *               |
+ *               +--> +----------------+ --+
+ *                    |      type      |   |
+ *                    +----------------+   |--> struct bl31_plat_param
+ *           NULL <---|      next      |   |
+ *                    +----------------+ --+
+ *                    | parameter data |
+ *                    +----------------+
+ *
+ * Note: The SCTLR_EL3.A bit (Alignment fault check enable) of ARM TF is set,
+ * so be sure each parameter struct starts on 64-bit aligned address. If not,
+ * alignment fault will occur during accessing its data member.
+ */
+
+/* param type */
+enum {
+	PARAM_NONE = 0,
+	PARAM_RESET,
+	PARAM_POWEROFF,
+};
+
+struct gpio_info {
+	uint8_t polarity;
+	uint8_t direction;
+	uint8_t pull_mode;
+	uint32_t index;
+};
+
+/* common header for all plat parameter type */
+struct bl31_plat_param {
+	uint64_t type;
+	void *next;
+};
+
+struct bl31_gpio_param {
+	struct bl31_plat_param h;
+	struct gpio_info gpio;
+};
+
+#endif /* __PLAT_PARAMS_H__ */