Driver for clock management and interrupt of Calypso's ARMIO

This driver is supposed to manage the clock and interrupt of the ARMIO block.
They are shared amongst the submodules and should have a single dedicated
control function.

2 files changed, 156 insertions, 0 deletions

diff --git a/nuttx/arch/arm/include/calypso/armio.h b/nuttx/arch/arm/include/calypso/armio.h
new file mode 100644
index 0000000000..9502e835eb
--- /dev/null
+++ b/nuttx/arch/arm/include/calypso/armio.h
@@ -0,0 +1,52 @@
+/****************************************************************************
+ * Driver for Calypso ARMIO
+ *
+ *   Copyright (C) 2011 Stefan Richter. All rights reserved.
+ *   Author: Stefan Richter <ichgeh@l--putt.de>
+ *
+ * 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. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+
+/****************************************************************************
+ * Prototypes for interrupt handling
+ ****************************************************************************/
+
+void calypso_kbd_irq();
+void calypso_gpio_irq();
+
+
+/****************************************************************************
+ * Initialize device, add /dev/... nodes
+ ****************************************************************************/
+
+void calypso_armio(void);
+void calypso_keypad(void);
diff --git a/nuttx/arch/arm/src/calypso/calypso_armio.c b/nuttx/arch/arm/src/calypso/calypso_armio.c
new file mode 100644
index 0000000000..c5e6693f20
--- /dev/null
+++ b/nuttx/arch/arm/src/calypso/calypso_armio.c
@@ -0,0 +1,104 @@
+/****************************************************************************
+ * Driver for shared features of ARMIO modules
+ *
+ *   Copyright (C) 2011 Stefan Richter. All rights reserved.
+ *   Author: Stefan Richter <ichgeh@l--putt.de>
+ *
+ * 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. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/irq.h>
+
+#include <arch/calypso/memory.h>
+#include <arch/calypso/armio.h>
+
+
+/****************************************************************************
+ * HW access
+ ****************************************************************************/
+
+#define BASE_ADDR_ARMIO	0xfffe4800
+#define ARMIO_REG(x)	((void *)BASE_ADDR_ARMIO + (x))
+
+enum armio_reg {
+	LATCH_IN	= 0x00,
+	LATCH_OUT	= 0x02,
+	IO_CNTL		= 0x04,
+	CNTL_REG	= 0x06,
+	LOAD_TIM	= 0x08,
+	KBR_LATCH_REG	= 0x0a,
+	KBC_REG		= 0x0c,
+	BUZZ_LIGHT_REG	= 0x0e,
+	LIGHT_LEVEL	= 0x10,
+	BUZZER_LEVEL	= 0x12,
+	GPIO_EVENT_MODE	= 0x14,
+	KBD_GPIO_INT	= 0x16,
+	KBD_GPIO_MASKIT	= 0x18,
+	GPIO_DEBOUNCING	= 0x1a,
+	GPIO_LATCH	= 0x1c,
+};
+
+#define KBD_INT		(1<<0)
+#define GPIO_INT	(1<<1)
+
+
+/****************************************************************************
+ * ARMIO interrupt handler
+ *   forward keypad events
+ *   forward GPIO events
+ ****************************************************************************/
+
+static int kbd_gpio_irq(int irq, uint32_t *regs)
+{
+	calypso_kbd_irq();
+	//calypso_gpio_irq();
+
+	return 0;
+}
+
+
+/****************************************************************************
+ * Initialize ARMIO
+ ****************************************************************************/
+
+void calypso_armio(void)
+{
+	/* Enable ARMIO clock */
+	writew(1<<5, ARMIO_REG(CNTL_REG));
+
+	/* Mask GPIO interrupt and keypad interrupt */
+	writew(KBD_INT|GPIO_INT, ARMIO_REG(KBD_GPIO_MASKIT));
+
+	/* Attach and enable the interrupt */
+	irq_attach(IRQ_KEYPAD_GPIO, (xcpt_t)kbd_gpio_irq);
+	up_enable_irq(IRQ_KEYPAD_GPIO);
+}