avr32: refactor the portmux/gpio code

  - Separate the portmux configuration functionality from the GPIO pin
    control API.
  - Separate the controller-specific code from the chip-specific code.
  - Allow "ganged" port configuration (multiple pins at once).
  - Add more flexibility to the "canned" peripheral select functions:
      - Allow using more than 23 address bits, more chip selects, as
	well as NAND- and CF-specific pins.
      - Make the MACB SPEED pin optional, and choose between MII/RMII
	using a parameter instead of an #ifdef.
      - Make it possible to use other MMC slots than slot 0, and support
	different MMC/SDCard data bus widths.
  - Use more reasonable pull-up defaults; floating pins may consume a
    lot of power.
  - Get rid of some custom portmux code from the mimc200 board code. The
    old gpio/portmux API couldn't really handle its requirements, but
    the new one can.
  - Add documentation.

The end result is slightly smaller code for all boards. Which isn't
really the point, but at least it isn't any larger.

This has been verified on ATSTK1002 and ATNGW100. I'd appreciate if
the board maintainers could help me test this on their boards. In
particular, the mimc200 port has lost a lot of code, so I'm hoping Mark
can help me out.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Cc: Mark Jackson <mpfj@mimc.co.uk>
Cc: Alex Raimondi <alex.raimondi@miromico.ch>
Cc: Julien May <julien.may@miromico.ch>

Changes since v1:
  * Enable pullup on NWAIT
  * Add missing include to portmux-pio.h
  * Rename CONFIG_PIO2 -> CONFIG_PORTMUX_PIO to match docs

1 files changed, 92 insertions, 0 deletions

diff --git a/cpu/at32ap/portmux-pio.c b/cpu/at32ap/portmux-pio.c
new file mode 100644
index 0000000..a29f94e
--- /dev/null
+++ b/cpu/at32ap/portmux-pio.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2006, 2008 Atmel Corporation
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 of
+ * the License, or (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+
+#include <asm/io.h>
+#include <asm/arch/memory-map.h>
+#include <asm/arch/gpio.h>
+
+void portmux_select_peripheral(void *port, unsigned long pin_mask,
+		enum portmux_function func, unsigned long flags)
+{
+	if (flags & PORTMUX_PULL_UP)
+		pio_writel(port, PUER, pin_mask);
+	else
+		pio_writel(port, PUDR, pin_mask);
+
+	switch (func) {
+	case PORTMUX_FUNC_A:
+		pio_writel(port, ASR, pin_mask);
+		break;
+	case PORTMUX_FUNC_B:
+		pio_writel(port, BSR, pin_mask);
+		break;
+	}
+
+	pio_writel(port, PDR, pin_mask);
+}
+
+void portmux_select_gpio(void *port, unsigned long pin_mask,
+		unsigned long flags)
+{
+	if (flags & PORTMUX_PULL_UP)
+		pio_writel(port, PUER, pin_mask);
+	else
+		pio_writel(port, PUDR, pin_mask);
+
+	if (flags & PORTMUX_OPEN_DRAIN)
+		pio_writel(port, MDER, pin_mask);
+	else
+		pio_writel(port, MDDR, pin_mask);
+
+	if (flags & PORTMUX_DIR_OUTPUT) {
+		if (flags & PORTMUX_INIT_HIGH)
+			pio_writel(port, SODR, pin_mask);
+		else
+			pio_writel(port, CODR, pin_mask);
+		pio_writel(port, OER, pin_mask);
+	} else {
+		pio_writel(port, ODR, pin_mask);
+	}
+
+	pio_writel(port, PER, pin_mask);
+}
+
+void pio_set_output_value(unsigned int pin, int value)
+{
+	void *port = pio_pin_to_port(pin);
+
+	if (!port)
+		panic("Invalid GPIO pin %u\n", pin);
+
+	__pio_set_output_value(port, pin & 0x1f, value);
+}
+
+int pio_get_input_value(unsigned int pin)
+{
+	void *port = pio_pin_to_port(pin);
+
+	if (!port)
+		panic("Invalid GPIO pin %u\n", pin);
+
+	return __pio_get_input_value(port, pin & 0x1f);
+}