Add new CC32 GPIO functions

2 files changed, 113 insertions, 0 deletions

diff --git a/src/cc32/cc32_gpio.c b/src/cc32/cc32_gpio.c
new file mode 100644
index 0000000..a645282
--- /dev/null
+++ b/src/cc32/cc32_gpio.c
@@ -0,0 +1,87 @@
+/*
+ * ChipCity CC32RS512 GPIO controller driver
+ *
+ * Copyright (C) 2012 Harald Welte <laforge@gnumonks.org>
+ *
+ * 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; either version 2 or
+ * (at your option) version 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+
+#include "cc32_regs.h"
+
+#include "cc32_sysc.h"
+#include "cc32_gpio.h"
+
+void cc32_gpio_output(uint8_t gpio, int output)
+{
+	uint32_t reg = GPIODIR0;
+
+	if (gpio >= 32) {
+		reg = GPIODIR1;
+		gpio -= 32;
+	}
+
+	if (output)
+		*GPIO_REG(reg) &= ~(1 << gpio);
+	else
+		*GPIO_REG(reg) |= (1 << gpio);
+}
+
+void cc32_gpio_set(uint8_t gpio, int val)
+{
+	uint32_t reg = GPIODAT0;
+
+	if (gpio >= 32) {
+		reg = GPIODAT1;
+		gpio -= 32;
+	}
+
+	if (val)
+		*GPIO_REG(reg) |= (1 << gpio);
+	else
+		*GPIO_REG(reg) &= ~(1 << gpio);
+}
+
+uint8_t cc32_gpio_get(uint8_t gpio)
+{
+	uint32_t reg = GPIODAT0;
+
+	if (gpio >= 32) {
+		reg = GPIODAT1;
+		gpio -= 32;
+	}
+
+	if (*GPIO_REG(reg) & (1 << gpio))
+		return 1;
+	else
+		return 0;
+}
+
+void cc32_gpio_alt(enum cc32_gpio_port port,
+		  enum cc32_gpio_alt alt)
+{
+	uint32_t tmp;
+
+	tmp = *SYSC_REG(SCGCON);
+	tmp &= ~(3 << (2*port));
+	tmp |= ((alt & 3) << (2*port));
+	*SYSC_REG(SCGCON) = tmp;
+}
+
+
+void cc32_gpio_init(void)
+{
+	cc32_sysc_clk_enable(CLK_GPIO);
+}
diff --git a/src/cc32/cc32_gpio.h b/src/cc32/cc32_gpio.h
new file mode 100644
index 0000000..ff2f3c5
--- /dev/null
+++ b/src/cc32/cc32_gpio.h
@@ -0,0 +1,26 @@
+#ifndef _CC32_GPIO_H
+#define _CC32_GPIO_H
+
+enum cc32_gpio_port {
+	CC32_GPIO_P0,
+	CC32_GPIO_P1,
+	CC32_GPIO_P2,
+	CC32_GPIO_P3,
+	CC32_GPIO_P4,
+	CC32_GPIO_P5,
+};
+
+enum cc32_gpio_alt {
+	CC32_GPIO_FUNC1,
+	CC32_GPIO_FUNC2,
+	CC32_GPIO_FUNC3,
+};
+
+void cc32_gpio_output(uint8_t gpio, int output);
+void cc32_gpio_set(uint8_t gpio, int val);
+uint8_t cc32_gpio_get(uint8_t gpio);
+void cc32_gpio_init(void);
+void cc32_gpio_alt(enum cc32_gpio_port port,
+		   enum cc32_gpio_alt alt);
+
+#endif