From 68ff45f40ada5b571bb6b2e27e23f77526cb4014 Mon Sep 17 00:00:00 2001
From: Caesar Wang <wxt@rock-chips.com>
Date: Wed, 25 May 2016 19:03:04 +0800
Subject: rockchip: add reset or power off gpio configuration for rk3399

We add plat parameter structs to support BL2 to pass variable-length,
variable-type parameters to BL31. The parameters are structured as a
link list. During bl31 setup time, we travse the list to process each
parameter. throuth this way, we can get the reset or power off gpio
parameter, and do hardware control in BL31. This structure also can
pass other parameter to BL31 in future.
---
 plat/rockchip/common/params_setup.c | 91 +++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 plat/rockchip/common/params_setup.c

(limited to 'plat/rockchip/common/params_setup.c')

diff --git a/plat/rockchip/common/params_setup.c b/plat/rockchip/common/params_setup.c
new file mode 100644
index 00000000..2a49556f
--- /dev/null
+++ b/plat/rockchip/common/params_setup.c
@@ -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.
+ */
+
+#include <arm_gic.h>
+#include <assert.h>
+#include <bl_common.h>
+#include <console.h>
+#include <debug.h>
+#include <gpio.h>
+#include <mmio.h>
+#include <platform.h>
+#include <plat_params.h>
+#include <plat_private.h>
+#include <string.h>
+
+static struct bl31_plat_param *bl31_params_head;
+static struct bl31_gpio_param param_reset;
+static struct bl31_gpio_param param_poweroff;
+static struct gpio_info *rst_gpio;
+static struct gpio_info *poweroff_gpio;
+
+void *plat_get_rockchip_gpio_reset(void)
+{
+	return rst_gpio;
+}
+
+void *plat_get_rockchip_gpio_poweroff(void)
+{
+	return poweroff_gpio;
+}
+
+void params_early_setup(void *plat_param_from_bl2)
+{
+	struct bl31_plat_param *param;
+	struct bl31_plat_param *bl2_param;
+	struct bl31_gpio_param *gpio_param;
+
+	/* keep plat parameters for later processing if need */
+	bl2_param = (struct bl31_plat_param *)plat_param_from_bl2;
+	while (bl2_param) {
+		switch (bl2_param->type) {
+		case PARAM_RESET:
+			param = (struct bl31_plat_param *)&param_reset;
+			memcpy((void *)param, (void *)bl2_param,
+				sizeof(struct bl31_gpio_param));
+			gpio_param = (struct bl31_gpio_param *)param;
+			rst_gpio = &gpio_param->gpio;
+			break;
+		case PARAM_POWEROFF:
+			param = (struct bl31_plat_param *)&param_poweroff;
+			memcpy((void *)param, (void *)bl2_param,
+				sizeof(struct bl31_gpio_param));
+			gpio_param = (struct bl31_gpio_param *)param;
+			poweroff_gpio = &gpio_param->gpio;
+			break;
+		default:
+			NOTICE("not expected type found\n");
+			return; /* don't continue if unexpected type found */
+		}
+		param->next = bl31_params_head;
+		bl31_params_head = param;
+		bl2_param = bl2_param->next;
+	}
+}
-- 
cgit