vf6xx: add I/O mux controller

Add I/O mux controller which is required to mux pins according to
their used function. For all pads, the alternative function 0 is
GPIO. For different pin mux function refer to the reference manual.

include/libopencm3/vf6xx/iomuxc.h

@@ -0,0 +1,256 @@
+/** @defgroup VF6xx_iomuxc_defines IO MUX Controller Defines
+ *
+ * @brief <b>Defined Constants and Types for the VF6xx IO MUX Controller</b>
+ *
+ * @ingroup VF6xx_defines
+ *
+ * @version 1.0.0
+ *
+ * @author @htmlonly &copy; @endhtmlonly 2014
+ * Stefan Agner <stefan@agner.ch>
+ *
+ * @date 03 July 2014
+ *
+ * LGPL License Terms @ref lgpl_license
+ *  */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2014 Stefan Agner <stefan@agner.ch>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBOPENCM3_VF6XX_IOMUXC_H
+#define LIBOPENCM3_VF6XX_IOMUXC_H
+
+#include <libopencm3/cm3/common.h>
+#include <libopencm3/vf6xx/memorymap.h>
+
+/* --- Convenience macros -------------------------------------------------- */
+
+/****************************************************************************/
+/** @defgroup iomuxc_reg IO MUX Controller register
+@ingroup VF6xx_iomuxc_defines
+
+@{*/
+#define IOMUXC(pad)			MMIO32(IOMUXC_BASE + (0x4 * pad))
+
+#define IOMUXC_PAD(mode, speed, dse, pus, flags) \
+	(IOMUXC_##mode) << IOMUXC_MUX_MODE_SHIFT | \
+	(IOMUXC_##speed) << IOMUXC_SPEED_SHIFT | \
+	(IOMUXC_##dse) << IOMUXC_DSE_SHIFT | \
+	(IOMUXC_##pus) << IOMUXC_PUS_SHIFT | \
+	(flags)
+
+
+/* --- GPIO registers ------------------------------------------------------ */
+
+#define IOMUXC_MUX_MODE_SHIFT		20
+#define IOMUXC_MUX_MODE_MASK		(0x7 << 20)
+#define IOMUXC_MUX_MODE_ALT0		0x0
+#define IOMUXC_MUX_MODE_ALT1		0x1
+#define IOMUXC_MUX_MODE_ALT2		0x2
+#define IOMUXC_MUX_MODE_ALT3		0x3
+#define IOMUXC_MUX_MODE_ALT4		0x4
+#define IOMUXC_MUX_MODE_ALT5		0x5
+#define IOMUXC_MUX_MODE_ALT6		0x6
+#define IOMUXC_MUX_MODE_ALT7		0x7
+#define IOMUXC_SPEED_SHIFT		12
+#define IOMUXC_SPEED_MASK		(0x3 << 12)
+#define IOMUXC_SPEED_LOW		0x0
+#define IOMUXC_SPEED_MEDIUM		0x1
+#define IOMUXC_SPEED_HIGH		0x3
+#define IOMUXC_SRE			(0x1 << 11)
+#define IOMUXC_ODE			(0x1 << 10)
+#define IOMUXC_HYS			(0x1 << 9)
+#define IOMUXC_DSE_SHIFT		6
+#define IOMUXC_DSE_MASK			(0x7 << 6)
+#define IOMUXC_DSE_OFF			0x0
+#define IOMUXC_DSE_150OHM		0x1
+#define IOMUXC_DSE_75OHM		0x2
+#define IOMUXC_DSE_50OHM		0x3
+#define IOMUXC_DSE_37OHM		0x4
+#define IOMUXC_DSE_30OHM		0x5
+#define IOMUXC_DSE_25OHM		0x6
+#define IOMUXC_DSE_20OHM		0x7
+#define IOMUXC_PUS_SHIFT		4
+#define IOMUXC_PUS_MASK			(0x3 << 4)
+#define IOMUXC_PUS_PD_100KOHM		0x0
+#define IOMUXC_PUS_PU_47KOHM		0x1
+#define IOMUXC_PUS_PU_100KOHM		0x2
+#define IOMUXC_PUS_PU_22KOHM		0x3
+#define IOMUXC_PKE			(0x1 << 3)
+#define IOMUXC_PUE			(0x1 << 2)
+#define IOMUXC_OBE			(0x1 << 1)
+#define IOMUXC_IBE			(0x1 << 0)
+
+
+/* --- Type definitions ---------------------------------------------------- */
+/*---------------------------------------------------------------------------*/
+/** @brief IO-MUX Pads
+
+Pads available by the IO-MUX controller
+*/
+
+enum vf6xx_pad {
+	PTA6,
+	PTA8,
+	PTA9,
+	PTA10,
+	PTA11,
+	PTA12,
+	PTA16,
+	PTA17,
+	PTA18,
+	PTA19,
+	PTA20,
+	PTA21,
+	PTA22,
+	PTA23,
+	PTA24,
+	PTA25,
+	PTA26,
+	PTA27,
+	PTA28,
+	PTA29,
+	PTA30,
+	PTA31,
+	PTB0,
+	PTB1,
+	PTB2,
+	PTB3,
+	PTB4,
+	PTB5,
+	PTB6,
+	PTB7,
+	PTB8,
+	PTB9,
+	PTB10,
+	PTB11,
+	PTB12,
+	PTB13,
+	PTB14,
+	PTB15,
+	PTB16,
+	PTB17,
+	PTB18,
+	PTB19,
+	PTB20,
+	PTB21,
+	PTB22,
+	PTC0,
+	PTC1,
+	PTC2,
+	PTC3,
+	PTC4,
+	PTC5,
+	PTC6,
+	PTC7,
+	PTC8,
+	PTC9,
+	PTC10,
+	PTC11,
+	PTC12,
+	PTC13,
+	PTC14,
+	PTC15,
+	PTC16,
+	PTC17,
+	PTD31,
+	PTD30,
+	PTD29,
+	PTD28,
+	PTD27,
+	PTD26,
+	PTD25,
+	PTD24,
+	PTD23,
+	PTD22,
+	PTD21,
+	PTD20,
+	PTD19,
+	PTD18,
+	PTD17,
+	PTD16,
+	PTD0,
+	PTD1,
+	PTD2,
+	PTD3,
+	PTD4,
+	PTD5,
+	PTD6,
+	PTD7,
+	PTD8,
+	PTD9,
+	PTD10,
+	PTD11,
+	PTD12,
+	PTD13,
+	PTB23,
+	PTB24,
+	PTB25,
+	PTB26,
+	PTB27,
+	PTB28,
+	PTC26,
+	PTC27,
+	PTC28,
+	PTC29,
+	PTC30,
+	PTC31,
+	PTE0,
+	PTE1,
+	PTE2,
+	PTE3,
+	PTE4,
+	PTE5,
+	PTE6,
+	PTE7,
+	PTE8,
+	PTE9,
+	PTE10,
+	PTE11,
+	PTE12,
+	PTE13,
+	PTE14,
+	PTE15,
+	PTE16,
+	PTE17,
+	PTE18,
+	PTE19,
+	PTE20,
+	PTE21,
+	PTE22,
+	PTE23,
+	PTE24,
+	PTE25,
+	PTE26,
+	PTE27,
+	PTE28,
+	PTA7,
+};
+
+
+/* --- Function prototypes ------------------------------------------------- */
+
+#include <libopencm3/cm3/common.h>
+
+BEGIN_DECLS
+
+void iomuxc_mux(enum vf6xx_pad pad, uint32_t muxc);
+
+END_DECLS
+
+#endif

include/libopencm3/vf6xx/memorymap.h

@@ -44,6 +44,13 @@
 #define SPI0_BASE			(PERIPH_BASE_AIPS0 + 0x2C000)
 #define SPI1_BASE			(PERIPH_BASE_AIPS0 + 0x2D000)
 
+#define IOMUXC_BASE			(PERIPH_BASE_AIPS0 + 0x48000)
+#define PORTA_MUX_BASE			(PERIPH_BASE_AIPS0 + 0x49000)
+#define PORTB_MUX_BASE			(PERIPH_BASE_AIPS0 + 0x4A000)
+#define PORTC_MUX_BASE			(PERIPH_BASE_AIPS0 + 0x4B000)
+#define PORTD_MUX_BASE			(PERIPH_BASE_AIPS0 + 0x4C000)
+#define PORTE_MUX_BASE			(PERIPH_BASE_AIPS0 + 0x4D000)
+
 #define ANADIG_BASE			(PERIPH_BASE_AIPS0 + 0x50000)
 
 #define CCM_BASE			(PERIPH_BASE_AIPS0 + 0x6B000)

lib/vf6xx/Makefile

@@ -34,7 +34,7 @@ CFLAGS		= -Os -g \
 		  -mcpu=cortex-m4 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
 		  -ffunction-sections -fdata-sections -MD -DVF6XX
 ARFLAGS		= rcs
-OBJS		= ccm.o uart.o gpio.o
+OBJS		= ccm.o uart.o gpio.o iomuxc.o
 
 VPATH += ../cm3
 

lib/vf6xx/iomuxc.c

@@ -0,0 +1,57 @@
+/** @defgroup VF6xx_iomuxc IOMUX-Control
+ *
+ * @ingroup VF6xx
+ *
+ * @section vf6xx_gpio_api_ex GPIO API.
+ *
+ * @brief <b>VF6xx IO Pad MUX Controller</b>
+ *
+ * @author @htmlonly &copy; @endhtmlonly 2014 Stefan Agner <stefan@agner.ch>
+ *
+ * @date 07 July 2014
+ *
+ * This library supports the GPIO module in the VF6xx SoC of Freescale.
+ * Access is provided by GPIO number according to the Pinmux list of the
+ * Reference Manual, similar as GPIOs are available on Linux.
+ *
+ * LGPL License Terms @ref lgpl_license
+ */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2014 Stefan Agner <stefan@agner.ch>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**@{*/
+
+#include <libopencm3/vf6xx/iomuxc.h>
+#include <libopencm3/vf6xx/ccm.h>
+
+/*---------------------------------------------------------------------------*/
+/** @brief Set GPIO
+
+Set GPIO by GPIO number according to MUX list
+
+@param[in] gpio unsigned 32 bit. GPIO number
+*/
+
+void iomuxc_mux(enum vf6xx_pad pad, uint32_t muxc)
+{
+	IOMUXC(pad) = muxc;
+}
+
+/**@}*/
+