From b5a5ba0335a35555f062f7604377339552454886 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Wed, 27 Feb 2013 15:16:46 +0000
Subject: Fix NuTiny-SDK-NUC120 LEDs

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5679 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/arch/arm/src/nuc1xx/nuc_gpio.c | 48 ++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

(limited to 'nuttx/arch/arm/src/nuc1xx/nuc_gpio.c')

diff --git a/nuttx/arch/arm/src/nuc1xx/nuc_gpio.c b/nuttx/arch/arm/src/nuc1xx/nuc_gpio.c
index 1ba92a801..366226a8c 100644
--- a/nuttx/arch/arm/src/nuc1xx/nuc_gpio.c
+++ b/nuttx/arch/arm/src/nuc1xx/nuc_gpio.c
@@ -43,6 +43,8 @@
 #include <assert.h>
 #include <debug.h>
 
+#include <arch/nuc1xx/chip.h>
+
 #include "up_arch.h"
 
 #include "chip.h"
@@ -222,6 +224,10 @@ int nuc_configgpio(gpio_cfgset_t cfgset)
 
 void nuc_gpiowrite(gpio_cfgset_t pinset, bool value)
 {
+#ifndef NUC_LOW
+  irqstate_t flags;
+  uintptr_t base;
+#endif
   int port;
   int pin;
 
@@ -233,7 +239,31 @@ void nuc_gpiowrite(gpio_cfgset_t pinset, bool value)
   pin  = (pinset & GPIO_PIN_MASK) >> GPIO_PIN_SHIFT;
 
   DEBUGASSERT((unsigned)port <= NUC_GPIO_PORTE);
+
+  /* Only the low density NUC100/120 chips support bit-band access to GPIO
+   * pins.
+   */
+
+#ifdef NUC_LOW
   putreg32((uint32_t)value, NUC_PORT_PDIO(port, pin));
+#else
+  /* Get the base address of the GPIO port registers */
+
+  base = NUC_GPIO_CTRL_BASE(port);
+
+  /* Disable interrupts -- the following operations must be atomic */
+
+  flags = irqsave();
+
+  /* Allow writing only to the selected pin in the DOUT register */
+
+  putreg32(~(1 << pin), base + NUC_GPIO_DMASK_OFFSET);
+
+  /* Set the pin to the selected value and re-enable interrupts */
+
+  putreg32(((uint32_t)value << pin), base + NUC_GPIO_DOUT_OFFSET);
+  irqrestore(flags);
+#endif
 }
 
 /****************************************************************************
@@ -246,6 +276,9 @@ void nuc_gpiowrite(gpio_cfgset_t pinset, bool value)
 
 bool nuc_gpioread(gpio_cfgset_t pinset)
 {
+#ifndef NUC_LOW
+  uintptr_t base;
+#endif
   int port;
   int pin;
 
@@ -257,5 +290,20 @@ bool nuc_gpioread(gpio_cfgset_t pinset)
   pin  = (pinset & GPIO_PIN_MASK) >> GPIO_PIN_SHIFT;
 
   DEBUGASSERT((unsigned)port <= NUC_GPIO_PORTE);
+
+  /* Only the low density NUC100/120 chips support bit-band access to GPIO
+   * pins.
+   */
+
+#ifdef NUC_LOW
   return (getreg32(NUC_PORT_PDIO(port, pin)) & PORT_MASK) != 0;
+#else
+  /* Get the base address of the GPIO port registers */
+
+  base = NUC_GPIO_CTRL_BASE(port);
+
+  /* Return the state of the selected pin */
+
+ return (getreg32(base + NUC_GPIO_PIN_OFFSET) & (1 << pin)) != 0;
+#endif
 }
-- 
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