[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/bsp/lk/platform/bcm28xx/gpio.c b/src/bsp/lk/platform/bcm28xx/gpio.c
new file mode 100644
index 0000000..49c31df
--- /dev/null
+++ b/src/bsp/lk/platform/bcm28xx/gpio.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2016 Adam Barth
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <dev/gpio.h>
+#include <errno.h>
+#include <platform/bcm28xx.h>
+#include <reg.h>
+
+#define NUM_PINS 54
+#define BITS_PER_REG 32
+#define BITS_PER_PIN 3
+#define PINS_PER_REG (BITS_PER_REG / BITS_PER_PIN)
+#define GPIOREG(base, nr) (REG32(base) + (nr / BITS_PER_REG))
+
+int gpio_config(unsigned nr, unsigned flags)
+{
+ unsigned mask = 0x7;
+ if (nr >= NUM_PINS || flags & ~mask)
+ return -EINVAL;
+ unsigned register_number = nr / PINS_PER_REG;
+ unsigned offset = (nr % PINS_PER_REG) * BITS_PER_PIN;
+ unsigned shifted_mask = mask << offset;
+ volatile uint32_t *reg = REG32(GPIO_GPFSEL0) + register_number;
+ *reg = (*reg & ~shifted_mask) | (flags << offset);
+ return 0;
+}
+
+void gpio_set(unsigned nr, unsigned on)
+{
+ unsigned offset = nr % BITS_PER_REG;
+ *GPIOREG(on ? GPIO_GPSET0 : GPIO_GPCLR0, nr) = 1 << offset;
+}
+
+int gpio_get(unsigned nr)
+{
+ unsigned offset = nr % BITS_PER_REG;
+ return (*GPIOREG(GPIO_GPLEV0, nr) & (1 << offset)) >> offset;
+}