1 files changed, 0 insertions, 204 deletions
diff --git a/nuttx/arch/arm/src/lpc313x/lpc313x_fdivinit.c b/nuttx/arch/arm/src/lpc313x/lpc313x_fdivinit.c
deleted file mode 100755
index 3d90bcba6..000000000
--- a/nuttx/arch/arm/src/lpc313x/lpc313x_fdivinit.c
+++ /dev/null
@@ -1,204 +0,0 @@
-/****************************************************************************
- * arch/arm/src/lpc313x/lpc313x_fdivinit.c
- *
- *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
- *
- * 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.
- *
- ****************************************************************************/
-
-/****************************************************************************
- * Included Files
- ****************************************************************************/
-
-#include <nuttx/config.h>
-
-#include <stdint.h>
-
-#include <arch/board/board.h>
-
-#include "lpc313x_cgu.h"
-#include "lpc313x_cgudrvr.h"
-
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: lpc313x_bitwidth
- *
- * Description:
- *   Find the bit width of a msub or madd value.  This will be use to
- *   extend the msub or madd values.  To minimize power consumption, the
- *   lpc313x user manual recommends that madd and msub be shifted right
- *   to have as many trailing zero's as possible.  This function detmines
- *   the pre-shifted with of one of the msub or madd values.
- *
- * EXAMPLE:
- *
- *  Say an input frequency of 13 MHz is given while a frequency of 12
- *  MHz is required. In this case we want a frequency
- *
- *    f’ = 12/13 × f
- *
- *  So n = 12 and m = 13. This then gives
- *
- *    madd = m - n = 13 - 12 = 1
- *    msub = -n = -12
- *
- * In order to minimize power consumption madd and msub must be as
- * large as possible. The limit of their values is determined by the
- * madd/msub bit width. In this case msub is the largest value,
- * in order to express -12, five bits are required. However since msub is
- * always negative the fractional divider does not need the sign bit, leaving
- * 4 bits. If madd/msub bit width has been set to say 8 bits, it is allowed
- * to shift 4 bits, giving:
- *
- *   msub’ = -(12<<4)= -12 × 24 = -12 × 16 = -192
- *   madd’ = 1<<4 = 24 = 16
- *
- ****************************************************************************/
-
-static inline unsigned int
-lpc313x_bitwidth(unsigned int value, unsigned int fdwid)
-{
-  unsigned int width = 0;
-  int bit;
-
-  /* Examine bits from the most significant down */
-
-  for (bit = fdwid-1; bit >= 0; bit--)
-    {
-      /* Is this bit set?  If so, then the width of the value is 0 to bit,
-       * or bit+1.
-       */
-    
-      if ((value & (1 << bit)) != 0)
-        {
-          width = bit + 1;
-          break;
-        }
-    }
-  return width;
-}
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-/****************************************************************************
- * Name: lpc313x_fdivinit
- *
- * Description:
- *   Enable and configure (or disable) a fractional divider.
- *
- ****************************************************************************/
-
-uint32_t lpc313x_fdivinit(int fdcndx,
-                          const struct lpc313x_fdivconfig_s *fdiv, bool enable)
-{
-  uint32_t     regaddr;
-  uint32_t     regval;
-  unsigned int fdshift;
-  unsigned int fdwid;
-  unsigned int fdmask;
-  unsigned int maddshift;
-  unsigned int msubshift;
-  int          madd;
-  int          msub;
-
-  /* Calculating the (unshifted) divider values.To minimize power
-   * consumption, the lpc313x user manual recommends that madd and msub
-   * be shifted right to have as many trailing zero's as possible.
-   */
- 
-  madd = fdiv->m - fdiv->n;
-  msub = -fdiv->n;
-
-  /* Determine the width of the madd and msub fields in the fractional divider
-   * register.  They are all 8-bits in width except for fractional divider 17.
-   */
-
-  fdwid     = CGU_FDC_FIELDWIDTH;
-  maddshift = CGU_FDC_MADD_SHIFT;
-  msubshift = CGU_FDC_MSUB_SHIFT;
-
-  if (fdcndx == 17)
-    {
-      /* For fractional divider 17, the msub/madd field width is 13 */
-
-      fdwid     = CGU_FDC17_FIELDWIDTH;
-      maddshift = CGU_FDC17_MADD_SHIFT;
-      msubshift = CGU_FDC17_MSUB_SHIFT;
-    }
-
-  /* Find maximum bit width of madd & msub.  Here we calculate the width of the OR
-   * of the two values.  The width of the OR will be the width of the wider value 
-   */
-
-  fdshift = fdwid - lpc313x_bitwidth((unsigned int)madd | (unsigned int)fdiv->n, fdwid);
-
-  /* Calculate the fractional divider register values */
-
-  fdmask = (1 << fdwid) - 1;
-  madd   = (madd << fdshift) & fdmask;
-  msub   = (msub << fdshift) & fdmask;
-  regval = (madd << maddshift) | (msub << msubshift);
-  
-  /* Check if 50% duty cycle is needed for this divider */
-
-  if (fdiv->stretch)
-    {
-      regval |= CGU_FDC_STRETCH;
-    }
-
-  /* Check if we should enable the divider immediately */
-
-  if (enable)
-    {
-      regval |= CGU_FDC_RUN;
-    }
-
-  /* Finally configure the divider */
-
-  regaddr = LPC313X_CGU_FDC(fdcndx);
-  putreg32(regval, regaddr);
-  return regval;
-}