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/************************************************************************
* arch/arm/src/lpc313x/lpc313x_bcrndx.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* References:
* - UM10314 LPC3130/31 User manual Rev. 1.01 � 9 September 2009
* - lpc313x.cdl.drivers.zip example driver code
*
* 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 "up_arch.h"
#include "lpc313x_cgudrvr.h"
/************************************************************************
* Pre-processor Definitions
************************************************************************/
/************************************************************************
* Private Data
************************************************************************/
/************************************************************************
* Private Functions
************************************************************************/
/************************************************************************
* Public Functions
************************************************************************/
/************************************************************************
* Name: lp313x_esrndx
*
* Description:
* Given a clock ID, return the index of the corresponding ESR
* register (or ESRNDX_INVALID if there is no ESR associated with
* this clock ID). Indexing of ESRs differs slightly from the clock
* ID: There are 92 clock IDs but only 89 ESR regisers. There are no
* ESR registers for :
*
*
* CLKID_I2SRXBCK0 Clock ID 87: I2SRX_BCK0
* CLKID_I2SRXBCK1, Clock ID 88: I2SRX_BCK1
*
* and
*
* CLKID_SYSCLKO Clock ID 91: SYSCLK_O
*
************************************************************************/
int lp313x_ncrndx(enum lpc313x_domainid_e dmnid)
{
switch (dmnid)
{
/* BCR0-3 correspond directly to domains 0-3 */
case DOMAINID_SYS: /* Domain 0: SYS_BASE */
case DOMAINID_AHB0APB0: /* Domain 1: AHB0APB0_BASE */
case DOMAINID_AHB0APB1: /* Domain 2: AHB0APB1_BASE */
case DOMAINID_AHB0APB2: /* Domain 3: AHB0APB2_BASE */
return (int)dmnid;
/* There is a BCR register corresponding to domain 7, but it is at
* index 4
*/
case DOMAINID_CLK1024FS: /* Domain 7: CLK1024FS_BASE */
return 4;
default: /* There is no BCR register for the other
* domains. */
break;
}
return BCRNDX_INVALID;
}
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