added SSP support files, fixed some typos

2 files changed, 128 insertions, 4 deletions

diff --git a/c/src/lib/libbsp/arm/lpc24xx/misc/dma.c b/c/src/lib/libbsp/arm/lpc24xx/misc/dma.c
new file mode 100644
index 0000000000..127f1934eb
--- /dev/null
+++ b/c/src/lib/libbsp/arm/lpc24xx/misc/dma.c
@@ -0,0 +1,124 @@
+/**
+ * @file
+ *
+ * @ingroup lpc24xx
+ *
+ * @brief DMA support.
+ */
+
+/*
+ * Copyright (c) 2008
+ * Embedded Brains GmbH
+ * Obere Lagerstr. 30
+ * D-82178 Puchheim
+ * Germany
+ * rtems@embedded-brains.de
+ *
+ * The license and distribution terms for this file may be found in the file
+ * LICENSE in this distribution or at http://www.rtems.com/license/LICENSE.
+ */
+
+#include <rtems/endian.h>
+
+#include <bsp/lpc24xx.h>
+#include <bsp/dma.h>
+
+/**
+ * @brief Table that indicates if a channel is currently occupied.
+ */
+static bool lpc24xx_dma_channel_occupation [GPDMA_CH_NUMBER];
+
+/**
+ * @brief Initializes the general purpose DMA.
+ */
+void lpc24xx_dma_initialize( void)
+{
+  rtems_interrupt_level level;
+
+  /* Enable power */
+  rtems_interrupt_disable( level);
+  PCONP = SET_FLAG( PCONP, PCONP_PCGPDMA);
+  rtems_interrupt_enable( level);
+
+  /* Disable module */
+  GPDMA_CONFIG = 0;
+
+  /* Enable module */
+  #if BYTE_ORDER == LITTLE_ENDIAN
+    GPDMA_CONFIG = GPDMA_CONFIG_EN;
+  #else
+    GPDMA_CONFIG = GPDMA_CONFIG_EN | GPDMA_CONFIG_MODE;
+  #endif
+
+  /* Reset registers */
+  GPDMA_SOFT_SREQ = 0;
+  GPDMA_SOFT_BREQ = 0;
+  GPDMA_SOFT_LSREQ = 0;
+  GPDMA_SOFT_LBREQ = 0;
+  GPDMA_SYNC = 0;
+}
+
+/**
+ * @brief Returns true if the channel @a channel was obtained.
+ *
+ * If the channel number @a channel is out of range the last valid channel will
+ * be used.
+ */
+bool lpc24xx_dma_channel_obtain( unsigned channel)
+{
+  rtems_interrupt_level level;
+  bool occupation = true;
+
+  if (channel > GPDMA_CH_NUMBER) {
+    channel = GPDMA_CH_NUMBER - 1;
+  }
+
+  rtems_interrupt_disable( level);
+  occupation = lpc24xx_dma_channel_occupation [channel];
+  lpc24xx_dma_channel_occupation [channel] = true;
+  rtems_interrupt_enable( level);
+
+  return !occupation;
+}
+
+/**
+ * @brief Releases the channel @a channel.  You must have obtained this channel
+ * with lpc24xx_dma_channel_obtain() previously.
+ *
+ * If the channel number @a channel is out of range the last valid channel will
+ * be used.
+ */
+void lpc24xx_dma_channel_release( unsigned channel)
+{
+  if (channel > GPDMA_CH_NUMBER) {
+    channel = GPDMA_CH_NUMBER - 1;
+  }
+
+  lpc24xx_dma_channel_occupation [channel] = false;
+}
+
+/**
+ * @brief Disables the channel @a channel.
+ *
+ * If @a force is false the channel will be halted and disabled when the
+ * channel is inactive.  If the channel number @a channel is out of range the
+ * last valid channel will be used.
+ */
+void lpc24xx_dma_channel_disable( unsigned channel, bool force)
+{
+  volatile lpc24xx_dma_channel *ch = GPDMA_CH_BASE_ADDR( channel);
+  uint32_t cfg = ch->cfg;
+
+  if (!force) {
+    /* Halt */
+    ch->cfg = SET_FLAG( cfg, GPDMA_CH_CFG_HALT);
+
+    /* Wait for inactive */
+    do {
+      cfg = ch->cfg;
+    } while (IS_FLAG_SET( cfg, GPDMA_CH_CFG_ACTIVE));
+  }
+
+  /* Disable */
+  ch->cfg = CLEAR_FLAG( cfg, GPDMA_CH_CFG_EN);
+}
diff --git a/c/src/lib/libbsp/arm/lpc24xx/misc/system-clocks.c b/c/src/lib/libbsp/arm/lpc24xx/misc/system-clocks.c
index 81a844e6ab..3b5e15f86d 100644
--- a/c/src/lib/libbsp/arm/lpc24xx/misc/system-clocks.c
+++ b/c/src/lib/libbsp/arm/lpc24xx/misc/system-clocks.c
@@ -71,7 +71,7 @@ unsigned lpc24xx_cclk( void)
   }
 
   /* Get PLL output frequency */
-  if (REG_FLAG_IS_SET( PLLSTAT, PLLSTAT_PLLC)) {
+  if (IS_FLAG_SET( PLLSTAT, PLLSTAT_PLLC)) {
     uint32_t pllcfg = PLLCFG;
     unsigned n = GET_PLLCFG_NSEL( pllcfg) + 1;
     unsigned m = GET_PLLCFG_MSEL( pllcfg) + 1;
@@ -110,10 +110,10 @@ static void lpc24xx_pll_config( uint32_t val)
  */
 void lpc24xx_set_pll( unsigned clksrc, unsigned nsel, unsigned msel, unsigned cclksel)
 {
-  bool pll_enabled = REG_FLAG_IS_SET( PLLSTAT, PLLSTAT_PLLE);
+  bool pll_enabled = IS_FLAG_SET( PLLSTAT, PLLSTAT_PLLE);
 
   /* Disconnect PLL if necessary */
-  if (REG_FLAG_IS_SET( PLLSTAT, PLLSTAT_PLLC)) {
+  if (IS_FLAG_SET( PLLSTAT, PLLSTAT_PLLC)) {
     if (pll_enabled) {
       lpc24xx_pll_config( PLLCON_PLLE);
     } else {
@@ -139,7 +139,7 @@ void lpc24xx_set_pll( unsigned clksrc, unsigned nsel, unsigned msel, unsigned cc
   lpc24xx_pll_config( PLLCON_PLLE);
 
   /* Wait for lock */
-  while (REG_FLAG_IS_CLEARED( PLLSTAT, PLLSTAT_PLOCK)) {
+  while (IS_FLAG_CLEARED( PLLSTAT, PLLSTAT_PLOCK)) {
     /* Wait */
   }