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nuttx/arch/arm/src/lpc31xx/lpc31_clkinit.c
patacongo 50321df42d Remove executable property from source and make files 
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5146 42af7a65-404d-4744-a932-0658087f49c3
2012-09-13 18:46:10 +00:00

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C
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/************************************************************************************
* arch/arm/src/lpc31xx/lpc31_clkinit.c
*
* Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 "lpc31_cgu.h"
#include "lpc31_cgudrvr.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/************************************************************************************
* Private Types
************************************************************************************/
/* This structure describes the configuration of one domain */
struct lpc31_domainconfig_s
{
enum lpc31_domainid_e dmnid; /* Domain ID */
uint32_t finsel; /* Frequency input selection */
uint32_t clk1; /* ID of first clock in the domain */
uint32_t nclks; /* Number of clocks in the domain */
uint32_t fdiv1; /* First frequency divider in the domain */
uint32_t nfdiv; /* Number of frequency dividers in the domain */
const struct lpc31_subdomainconfig_s* sub; /* Sub=domain array */
};
/************************************************************************************
* Private Data
************************************************************************************/
/************************************************************************************
* Public Data
************************************************************************************/
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Name: lpc31_domaininit
*
* Description:
* Initialize one clock domain based on board-specific clock configuration data
*
************************************************************************************/
static void lpc31_domaininit(struct lpc31_domainconfig_s* dmn)
{
const struct lpc31_subdomainconfig_s * sub = dmn->sub;
uint32_t fdivcfg;
uint32_t regaddr;
uint32_t regval;
int fdndx;
int clkndx;
int bcrndx = lpc31_bcrndx(dmn->dmnid);
int esrndx;
if (bcrndx != BCRNDX_INVALID)
{
/* Disable BCR for domain */
regaddr = LPC31_CGU_BCR(bcrndx);
putreg32(0, regaddr);
}
/* Configure the fractional dividers in this domain */
for (fdndx = 0; fdndx < dmn->nfdiv; fdndx++, sub++)
{
/* Set fractional divider confiruation but don't enable it yet */
fdivcfg = lpc31_fdivinit(fdndx + dmn->fdiv1, &sub->fdiv, false);
/* Enable frac divider only if it has valid settings */
if (fdivcfg != 0)
{
/* Select the fractional dividir for each clock in this
* sub domain.
*/
for (clkndx = 0; clkndx <= dmn->nclks; clkndx++)
{
/* Does this clock have an ESR register? */
esrndx = lpc31_esrndx((enum lpc31_clockid_e)(clkndx + dmn->clk1));
if (esrndx != ESRNDX_INVALID)
{
/* Yes.. Check if this clock belongs to this sub-domain */
if (sub->clkset & (1 << clkndx))
{
/* Yes.. configure the clock to use this fractional divider */
regaddr = LPC31_CGU_ESR(esrndx);
putreg32((fdndx << CGU_ESR_ESRSEL_SHIFT) | CGU_ESR_ESREN, regaddr);
}
}
}
/* Enable the fractional divider */
regaddr = LPC31_CGU_FDC(fdndx + dmn->fdiv1);
regval = getreg32(regaddr);
regval |= CGU_FDC_RUN;
putreg32(regval, regaddr);
}
}
if (bcrndx != BCRNDX_INVALID)
{
/* Enable the BCR for domain */
regaddr = LPC31_CGU_BCR(bcrndx);
putreg32(CGU_BCR_FDRUN, regaddr);
}
/* Select input base clock for domain*/
lpc31_selectfreqin(dmn->dmnid, dmn->finsel);
}
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: lpc31_clkinit
*
* Description:
* Initialize all clock domains based on board-specific clock configuration data
*
************************************************************************************/
void lpc31_clkinit(const struct lpc31_clkinit_s* cfg)
{
struct lpc31_domainconfig_s domain;
/* Reset all clocks and connect them to FFAST */
lpc31_resetclks();
/* Initialize Domain0 = SYS_BASE clocks */
domain.dmnid = DOMAINID_SYS;
domain.finsel = cfg->domain0.finsel;
domain.clk1 = CLKID_SYSBASE_FIRST;
domain.nclks = (CLKID_SYSBASE_LAST - CLKID_SYSBASE_FIRST) + 1;
domain.fdiv1 = FRACDIV_BASE0_LOW;
domain.nfdiv = FRACDIV_BASE0_CNT;
domain.sub = cfg->domain0.sub;
lpc31_domaininit(&domain);
/* Initialize Domain1 = AHB0APB0_BASE clocks */
domain.dmnid = DOMAINID_AHB0APB0;
domain.finsel = cfg->domain1.finsel;
domain.clk1 = CLKID_AHB0APB0_FIRST;
domain.nclks = (CLKID_AHB0APB0_LAST - CLKID_AHB0APB0_FIRST) + 1;
domain.fdiv1 = FRACDIV_BASE1_LOW;
domain.nfdiv = FRACDIV_BASE1_CNT;
domain.sub = cfg->domain1.sub;
lpc31_domaininit(&domain);
/* Initialize Domain2 = AHB0APB1_BASE clocks */
domain.dmnid = DOMAINID_AHB0APB1;
domain.finsel = cfg->domain2.finsel;
domain.clk1 = CLKID_AHB0APB1_FIRST;
domain.nclks = (CLKID_AHB0APB1_LAST - CLKID_AHB0APB1_FIRST) + 1;
domain.fdiv1 = FRACDIV_BASE2_LOW;
domain.nfdiv = FRACDIV_BASE2_CNT;
domain.sub = cfg->domain2.sub;
lpc31_domaininit(&domain);
/* Initialize Domain3 = AHB0APB2_BASE clocks */
domain.dmnid = DOMAINID_AHB0APB2;
domain.finsel = cfg->domain3.finsel;
domain.clk1 = CLKID_AHB0APB2_FIRST;
domain.nclks = (CLKID_AHB0APB2_LAST - CLKID_AHB0APB2_FIRST) + 1;
domain.fdiv1 = FRACDIV_BASE3_LOW;
domain.nfdiv = FRACDIV_BASE3_CNT;
domain.sub = cfg->domain3.sub;
lpc31_domaininit(&domain);
/* Initialize Domain4 = AHB0APB3_BASE clocks */
domain.dmnid = DOMAINID_AHB0APB3;
domain.finsel = cfg->domain4.finsel;
domain.clk1 = CLKID_AHB0APB3_FIRST;
domain.nclks = (CLKID_AHB0APB3_LAST - CLKID_AHB0APB3_FIRST) + 1;
domain.fdiv1 = FRACDIV_BASE4_LOW;
domain.nfdiv = FRACDIV_BASE4_CNT;
domain.sub = cfg->domain4.sub;
lpc31_domaininit(&domain);
/* Initialize Domain5 = PCM_BASE clocks */
domain.dmnid = DOMAINID_PCM;
domain.finsel = cfg->domain5.finsel;
domain.clk1 = CLKID_PCM_FIRST;
domain.nclks = 1;
domain.fdiv1 = FRACDIV_BASE5_LOW;
domain.nfdiv = FRACDIV_BASE5_CNT;
domain.sub = cfg->domain5.sub;
lpc31_domaininit(&domain);
/* Initialize Domain6 = UART_BASE clocks */
domain.dmnid = DOMAINID_UART;
domain.finsel = cfg->domain6.finsel;
domain.clk1 = CLKID_UART_FIRST;
domain.nclks = 1;
domain.fdiv1 = FRACDIV_BASE6_LOW;
domain.nfdiv = FRACDIV_BASE6_CNT;
domain.sub = cfg->domain6.sub;
lpc31_domaininit(&domain);
/* Initialize Domain7 = CLK1024FS_BASE clocks */
domain.dmnid = DOMAINID_CLK1024FS;
domain.finsel = cfg->domain7.finsel;
domain.clk1 = CLKID_CLK1024FS_FIRST;
domain.nclks = (CLKID_CLK1024FS_LAST - CLKID_CLK1024FS_FIRST) + 1;
domain.fdiv1 = FRACDIV_BASE7_LOW;
domain.nfdiv = FRACDIV_BASE7_CNT;
domain.sub = cfg->domain7.sub;
lpc31_domaininit(&domain);
/* Initialize Domain8 = I2SRX_BCK0_BASE clocks */
lpc31_selectfreqin(DOMAINID_BCK0, cfg->domain8.finsel);
/* Initialize Domain9 = I2SRX_BCK1_BASE clocks */
lpc31_selectfreqin(DOMAINID_BCK1, cfg->domain9.finsel);
/* Initialize Domain10 = SPI_BASE clocks */
domain.dmnid = DOMAINID_SPI;
domain.finsel = cfg->domain10.finsel;
domain.clk1 = CLKID_SPI_FIRST;
domain.nclks = (CLKID_SPI_LAST - CLKID_SPI_FIRST) + 1;
domain.fdiv1 = FRACDIV_BASE10_LOW;
domain.nfdiv = FRACDIV_BASE10_CNT;
domain.sub = cfg->domain10.sub;
lpc31_domaininit(&domain);
/* Initialize Domain11 = SYSCLK_O_BASE clocks */
lpc31_selectfreqin(DOMAINID_SYSCLKO, cfg->domain11.finsel);
/* Initialize Dynamic fractional dividers -- to be provided */
}
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