bsp/beagle: Import Beagle pinmux from FreeBSD

This patch imports the beagle pinmux driver from FreeBSD into
RTEMS. Previously this driver was placed in RTEMS-libBSD but
this caused double initialization of few pins once during RTEMS
initialization and second time during libBSD initialization.
The following patches port the driver from FreeBSD to RTEMS and
will remove the driver from RTEMS-libBSD.

RTEMS Ticket Update: #3784

FreeBSD head: ca12b7e9534b10af022fed60c043984dbaf4003d

The following files have been imported from FreeBSD:
1) freebsd/sys/arm/ti/am335x/am335x_scm_padconf.h
2) freebsd/sys/arm/ti/am335x/am335x_scm_padconf.c
3) freebsd/sys/arm/ti/ti_pinmux.h
4) freebsd/sys/arm/ti/ti_pinmux.c

bsps/include/arm/ti/am335x/am335x_scm_padconf.h

@@ -0,0 +1,47 @@
+/*-
+ * Copyright (c) 2012 Damjan Marion <dmarion@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef AM335X_SCM_PADCONF_H
+#define AM335X_SCM_PADCONF_H
+
+#define SLEWCTRL	(0x01 << 6) /* faster(0) or slower(1) slew rate. */
+#define RXACTIVE	(0x01 << 5) /* Input enable value for the Pad */
+#define PULLTYPESEL	(0x01 << 4) /* Pad pullup/pulldown type selection */
+#define PULLUDEN	(0x01 << 3) /* Pullup/pulldown disabled */
+
+#define PADCONF_OUTPUT			(PULLUDEN)
+#define PADCONF_OUTPUT_PULLUP		(PULLTYPESEL)
+#define PADCONF_OUTPUT_PULLDOWN		(0)
+#define PADCONF_INPUT			(RXACTIVE | PULLUDEN)
+#define PADCONF_INPUT_PULLUP		(RXACTIVE | PULLTYPESEL)
+#define PADCONF_INPUT_PULLDOWN		(RXACTIVE)
+#define PADCONF_INPUT_PULLUP_SLOW	(PADCONF_INPUT_PULLUP | SLEWCTRL)
+
+extern const struct ti_pinmux_device ti_am335x_pinmux_dev;
+
+#endif /* AM335X_SCM_PADCONF_H */

bsps/include/arm/ti/ti_pinmux.h

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2010
+ *	Ben Gray <ben.r.gray@gmail.com>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ben Gray.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BEN GRAY ``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 BEN GRAY 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.
+ *
+ * $FreeBSD$
+ */
+
+
+/**
+ *	Functions to configure the PIN multiplexing on the chip.
+ *
+ *	This is different from the GPIO module in that it is used to configure the
+ *	pins between modules not just GPIO input output.
+ *
+ */
+#ifndef _TI_PINMUX_H_
+#define _TI_PINMUX_H_
+
+struct ti_pinmux_padconf {
+	uint16_t    reg_off;
+	uint16_t    gpio_pin;
+	uint16_t    gpio_mode;
+	const char  *ballname;
+	const char  *muxmodes[8];
+};
+
+struct ti_pinmux_padstate {
+	const char  *state;
+	uint16_t    reg;
+};
+
+struct ti_pinmux_device {
+	uint16_t		padconf_muxmode_mask;
+	uint16_t		padconf_sate_mask;
+	const struct ti_pinmux_padstate	*padstate;
+	const struct ti_pinmux_padconf	*padconf;
+};
+
+struct ti_pinmux_softc {
+	device_t		sc_dev;
+	struct resource *	sc_res[4];
+	bus_space_tag_t		sc_bst;
+	bus_space_handle_t	sc_bsh;
+};
+
+int ti_pinmux_padconf_set(const char *padname, const char *muxmode, 
+    unsigned int state);
+int ti_pinmux_padconf_get(const char *padname, const char **muxmode,
+    unsigned int *state);
+int ti_pinmux_padconf_set_gpiomode(uint32_t gpio, unsigned int state);
+int ti_pinmux_padconf_get_gpiomode(uint32_t gpio, unsigned int *state);
+
+#endif /* _TI_SCM_H_ */