hikey: Add UEFI sources for reference
UEFI needs to be built outside Android build system.
Please follow the instructions in README.
The sources correspond to:
https://github.com/96boards/edk2/commit/14eae0c12e71fd33c4c0fc51e4475e8db02566cf
https://github.com/96boards/arm-trusted-firmware/commit/e9b4909dcd75fc4ae7041cfb83d28ab9adb7afdf
https://github.com/96boards/l-loader/commit/6b784ad5c4ab00e2b1c6f53cd5f74054e5d00a78
https://git.linaro.org/uefi/uefi-tools.git/commit/abe618f8ab72034fff1ce46c9c006a2c6bd40a7e
Change-Id: Ieeefdb63e673e0c8e64e0a1f02c7bddc63b2c7fb
Signed-off-by: Vishal Bhoj <vishal.bhoj@linaro.org>
diff --git a/uefi/arm-trusted-firmware/drivers/arm/gpio/gpio.c b/uefi/arm-trusted-firmware/drivers/arm/gpio/gpio.c
new file mode 100644
index 0000000..a38db94
--- /dev/null
+++ b/uefi/arm-trusted-firmware/drivers/arm/gpio/gpio.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2014-2015, Linaro Ltd and Contributors. All rights reserved.
+ * Copyright (c) 2014-2015, Hisilicon Ltd and Contributors. All rights reserved.
+ *
+ * GPIO driver for PL061
+ *
+ * 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 <console.h>
+#include <debug.h>
+#include <errno.h>
+#include <gpio.h>
+#include <mmio.h>
+
+#define MAX_GPIO_DEVICES 32
+#define GPIOS_PER_DEV 8
+#define GPIO_DIR 0x400
+
+#define BIT(nr) (1UL << (nr))
+
+struct gpio_device_t {
+ unsigned int base[MAX_GPIO_DEVICES];
+ unsigned int count;
+};
+
+static struct gpio_device_t gpio_dev;
+
+/* return 0 for failure */
+static unsigned int find_gc_base(unsigned int gpio)
+{
+ int gc;
+
+ gc = gpio / GPIOS_PER_DEV;
+ if (gc >= gpio_dev.count)
+ return 0;
+ return gpio_dev.base[gc];
+}
+
+int gpio_direction_input(unsigned int gpio)
+{
+ unsigned int gc_base, offset, data;
+
+ gc_base = find_gc_base(gpio);
+ if (!gc_base)
+ return -EINVAL;
+ offset = gpio % GPIOS_PER_DEV;
+
+ data = mmio_read_8(gc_base + GPIO_DIR);
+ data &= ~(1 << offset);
+ mmio_write_8(gc_base + GPIO_DIR, data);
+ return 0;
+}
+
+int gpio_direction_output(unsigned int gpio)
+{
+ unsigned int gc_base, offset, data;
+
+ gc_base = find_gc_base(gpio);
+ if (!gc_base)
+ return -EINVAL;
+ offset = gpio % 8;
+
+ data = mmio_read_8(gc_base + GPIO_DIR);
+ data |= 1 << offset;
+ mmio_write_8(gc_base + GPIO_DIR, data);
+ return 0;
+}
+
+int gpio_get_value(unsigned int gpio)
+{
+ unsigned int gc_base, offset;
+
+ gc_base = find_gc_base(gpio);
+ if (!gc_base)
+ return -EINVAL;
+ offset = gpio % 8;
+
+ return !!mmio_read_8(gc_base + (BIT(offset + 2)));
+}
+
+int gpio_set_value(unsigned int gpio, unsigned int value)
+{
+ unsigned int gc_base, offset;
+
+ gc_base = find_gc_base(gpio);
+ if (!gc_base)
+ return -EINVAL;
+ offset = gpio % 8;
+ mmio_write_8(gc_base + (BIT(offset + 2)), !!value << offset);
+ return 0;
+}
+
+int gpio_register_device(unsigned int base)
+{
+ int i;
+ if (gpio_dev.count > MAX_GPIO_DEVICES)
+ return -EINVAL;
+ for (i = 0; i < gpio_dev.count; i++) {
+ if (gpio_dev.base[i] == base) {
+ WARN("%s: duplicated gpio base\n", __func__);
+ return -EINVAL;
+ }
+ }
+ gpio_dev.base[gpio_dev.count] = base;
+ gpio_dev.count++;
+ return 0;
+}