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/****************************************************************************
* arch/arm/src/lpc31xx/lpc31_exten.c
*
* Copyright (C) 2009 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_cgudrvr.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: lpc31_enableexten
*
* Description:
* Enable external enabling for the the specified possible clocks.
*
****************************************************************************/
void lpc31_enableexten(enum lpc31_clockid_e clkid)
{
uint32_t regaddr;
uint32_t regval;
switch (clkid)
{
case CLKID_DMACLKGATED: /* 9 DMA_CLK_GATED */
case CLKID_EVENTROUTERPCLK: /* 31 EVENT_ROUTER_PCLK */
case CLKID_ADCPCLK: /* 32 ADC_PCLK */
case CLKID_IOCONFPCLK: /* 35 IOCONF_PCLK */
case CLKID_CGUPCLK: /* 36 CGU_PCLK */
case CLKID_SYSCREGPCLK: /* 37 SYSCREG_PCLK */
case CLKID_OTPPCLK: /* 38 OTP_PCLK (Reserved on LPC313X) */
case CLKID_PWMPCLKREGS: /* 46 PWM_PCLK_REGS */
case CLKID_PCMAPBPCLK: /* 52 PCM_APB_PCLK */
case CLKID_SPIPCLKGATED: /* 57 SPI_PCLK_GATED */
case CLKID_SPICLKGATED: /* 90 SPI_CLK_GATED */
case CLKID_PCMCLKIP: /* 71 PCM_CLK_IP */
regaddr = LPC31_CGU_PCR(clkid);
regval = getreg32(regaddr);
regval |= CGU_PCR_EXTENEN;
putreg32(regval, regaddr);
break;
/* Otherwise, force disable for the clocks. NOTE that a larger set will
* be disabled than will be enabled.
*/
default:
lpc31_disableexten(clkid);
break;
}
}
/****************************************************************************
* Name: lpc31_disableexten
*
* Description:
* Disable external enabling for the the specified possible clocks.
*
****************************************************************************/
void lpc31_disableexten(enum lpc31_clockid_e clkid)
{
uint32_t regaddr;
uint32_t regval;
switch (clkid)
{
case CLKID_DMACLKGATED: /* 9 DMA_CLK_GATED */
case CLKID_EVENTROUTERPCLK: /* 31 EVENT_ROUTER_PCLK */
case CLKID_ADCPCLK: /* 32 ADC_PCLK */
case CLKID_WDOGPCLK: /* 34 WDOG_PCLK */
case CLKID_IOCONFPCLK: /* 35 IOCONF_PCLK */
case CLKID_CGUPCLK: /* 36 CGU_PCLK */
case CLKID_SYSCREGPCLK: /* 37 SYSCREG_PCLK */
case CLKID_OTPPCLK: /* 38 OTP_PCLK (Reserved on LPC313X) */
case CLKID_PWMPCLKREGS: /* 46 PWM_PCLK_REGS */
case CLKID_I2C0PCLK: /* 48 I2C0_PCLK */
case CLKID_I2C1PCLK: /* 49 I2C1_PCLK */
case CLKID_PCMAPBPCLK: /* 52 PCM_APB_PCLK */
case CLKID_UARTAPBCLK: /* 53 UART_APB_CLK */
case CLKID_SPIPCLKGATED: /* 57 SPI_PCLK_GATED */
case CLKID_SPICLKGATED: /* 90 SPI_CLK_GATED */
case CLKID_PCMCLKIP: /* 71 PCM_CLK_IP */
case CLKID_LCDPCLK: /* 54 LCD_PCLK */
regaddr = LPC31_CGU_PCR(clkid);
regval = getreg32(regaddr);
regval &= ~CGU_PCR_EXTENEN;
putreg32(regval, regaddr);
break;
default:
break;
}
}
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