07dbb2ef5f
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1109 42af7a65-404d-4744-a932-0658087f49c3
452 lines
12 KiB
C
452 lines
12 KiB
C
/********************************************************************************
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* arch/arm/src/str71x/str71x_prccu.c
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*
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* Copyright (C) 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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********************************************************************************/
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/********************************************************************************
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* Included Files
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********************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include "chip.h"
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/********************************************************************************
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* Definitions
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********************************************************************************/
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/* Input frequency (CLK2) is either the main oscillator or the main oscillator
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* divided by 2.
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*/
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#ifdef STR71X_PLL1_DIV2
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# define STR71X_PLL1_CLK2 (STR71X_RCCU_MAIN_OSC/2)
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#else
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# define STR71X_RCCU_MAIN_OSC STR71X_RCCU_MAIN_OSC
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#endif
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/* Select set of peripherals to be enabled */
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/* APB1 periperals */
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#ifndef CONFIG_STR71X_I2C0
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# define APB1EN_I2C0 STR71X_APB1_I2C0
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#else
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# define APB1EN_I2C0 (0)
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#endif
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#ifndef CONFIG_STR71X_I2C1
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# define APB1EN_I2C1 STR71X_APB1_I2C1
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#else
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# define APB1EN_I2C1 (0)
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#endif
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#ifndef CONFIG_STR71X_UART0
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# define APB1EN_UART0 STR71X_APB1_UART0
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#else
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# ifndef CONFIG_STR71X_GPIO0
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# error "CONFIG_STR71X_UART0 requires CONFIG_STR71X_GPIO0"
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# endif
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# define APB1EN_UART0 (0)
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#endif
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#ifndef CONFIG_STR71X_UART1
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# define APB1EN_UART1 STR71X_APB1_UART1
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#else
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# ifndef CONFIG_STR71X_GPIO0
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# error "CONFIG_STR71X_UART1 requires CONFIG_STR71X_GPIO0"
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# endif
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# define APB1EN_UART1 (0)
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#endif
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#ifndef CONFIG_STR71X_UART2
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# define APB1EN_UART2 STR71X_APB1_UART2
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#else
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# ifndef CONFIG_STR71X_GPIO0
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# error "CONFIG_STR71X_UART2 requires CONFIG_STR71X_GPIO0"
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# endif
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# define APB1EN_UART2 (0)
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#endif
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#ifndef CONFIG_STR71X_UART3
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# define APB1EN_UART3 STR71X_APB1_UART3
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#else
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# ifndef CONFIG_STR71X_GPIO0
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# error "CONFIG_STR71X_UART3 requires CONFIG_STR71X_GPIO0"
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# endif
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# define APB1EN_UART3 (0)
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#endif
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#ifndef CONFIG_STR71X_USB
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# define APB1EN_USB STR71X_APB1_USB
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#else
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# define APB1EN_USB (0)
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#endif
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#ifndef CONFIG_STR71X_CAN
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# define APB1EN_CAN STR71X_APB1_CAN
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#else
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# define APB1EN_CAN (0)
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#endif
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#ifndef CONFIG_STR71X_BSPI0
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# define APB1EN_BSPI0 STR71X_APB1_BSPI0
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#else
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# define APB1EN_BSPI0 (0)
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#endif
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#ifndef CONFIG_STR71X_BSPI1
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# define APB1EN_BSPI1 STR71X_APB1_BSPI1
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#else
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# define APB1EN_BSPI1 (0)
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#endif
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#ifndef CONFIG_STR71X_HDLC
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# define APB1EN_HDLC STR71X_APB1_HDLC
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#else
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# define APB1EN_HDLC (0)
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#endif
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#define APB1EN_ALL (APB1EN_I2C0|APB1EN_I2C1|APB1EN_UART0|APB1EN_UART1|\
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APB1EN_UART2|APB1EN_UART3|APB1EN_USB|APB1EN_CAN|\
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APB1EN_BSPI0|APB1EN_BSPI1|APB1EN_HDLC)
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/* APB2 Peripherals */
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#ifndef CONFIG_STR71X_XTI
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# define APB2EN_XTI STR71X_APB2_XTI
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#else
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# define APB2EN_XTI (0)
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#endif
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#ifndef CONFIG_STR71X_GPIO0
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# define APB2EN_GPIO0 STR71X_APB2_GPIO0
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#else
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# define APB2EN_GPIO0 (0)
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#endif
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#ifndef CONFIG_STR71X_GPIO1
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# define APB2EN_GPIO1 STR71X_APB2_GPIO1
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#else
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# define APB2EN_GPIO1 (0)
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#endif
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#ifndef CONFIG_STR71X_GPIO2
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# define APB2EN_GPIO2 STR71X_APB2_GPIO2
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#else
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# define APB2EN_GPIO2 (0)
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#endif
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#ifndef CONFIG_STR71X_ADC12
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# define APB2EN_ADC12 STR71X_APB2_ADC12
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#else
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# define APB2EN_ADC12 (0)
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#endif
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#ifndef CONFIG_STR71X_CKOUT
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# define APB2EN_CKOUT STR71X_APB2_CKOUT
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#else
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# define APB2EN_CKOUT (0)
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#endif
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#define APB2EN_TIM0 (0) /* System timer -- always enabled */
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#ifndef CONFIG_STR71X_TIM1
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# define APB2EN_TIM1 STR71X_APB2_TIM1
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#else
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# define APB2EN_TIM1 (0)
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#endif
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#ifndef CONFIG_STR71X_TIM2
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# define APB2EN_TIM2 STR71X_APB2_TIM2
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#else
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# define APB2EN_TIM2 (0)
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#endif
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#ifndef CONFIG_STR71X_TIM3
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# define APB2EN_TIM3 STR71X_APB2_TIM3
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#else
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# define APB2EN_TIM3 (0)
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#endif
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#ifndef CONFIG_STR71X_RTC
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# define APB2EN_RTC STR71X_APB2_RTC
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#else
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# define APB2EN_RTC (0)
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#endif
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#define APB2EN_EIC (0) /* Interrupt controller always enabled */
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#define APB2EN_ALL (APB2EN_XTI|APB2EN_GPIO0|APB2EN_GPIO1|APB2EN_GPIO2|\
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APB2EN_ADC12|APB2EN_CKOUT|APB2EN_TIM0|APB2EN_TIM1|\
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APB2EN_TIM2|APB2EN_TIM3|APB2EN_RTC|APB2EN_EIC)
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#if STR71X_PLL1OUT_MUL == 12
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# define PLL1MUL STR71X_RCCUPLL1CR_MUL12
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#elif STR71X_PLL1OUT_MUL == 16
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# define PLL1MUL STR71X_RCCUPLL1CR_MUL16
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#elif STR71X_PLL1OUT_MUL == 20
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# define PLL1MUL STR71X_RCCUPLL1CR_MUL20
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#else STR71X_PLL1OUT_MUL == 24
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# define PLL1MUL STR71X_RCCUPLL1CR_MUL24
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#else
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# error "Unsupporetd value for STR71X_PLL1OUT_MUL"
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#endif
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#if STR71X_PLL1OUT_DIV == 1
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# define PLL1DIV STR71X_RCCUPLL1CR_DIV1
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#elif STR71X_PLL1OUT_DIV == 2
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# define PLL1DIV STR71X_RCCUPLL1CR_DIV2
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#elif STR71X_PLL1OUT_DIV == 3
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# define PLL1DIV STR71X_RCCUPLL1CR_DIV3
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#elif STR71X_PLL1OUT_DIV == 4
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# define PLL1DIV STR71X_RCCUPLL1CR_DIV4
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#elif STR71X_PLL1OUT_DIV == 5
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# define PLL1DIV STR71X_RCCUPLL1CR_DIV5
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#elif STR71X_PLL1OUT_DIV == 6
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# define PLL1DIV STR71X_RCCUPLL1CR_DIV6
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#elif STR71X_PLL1OUT_DIV == 7
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# define PLL1DIV STR71X_RCCUPLL1CR_DIV7
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#else
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# error "Unsupported value for STR71X_PLL1OUT_DIV"
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#endif
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#if STR71X_APB1_DIV == 1
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# define APB1DIV STR71X_PCUPDIVR_APB1DIV1
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#elif STR71X_APB1_DIV == 2
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# define APB1DIV STR71X_PCUPDIVR_APB1DIV2
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#elif STR71X_APB1_DIV == 4
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# define APB1DIV STR71X_PCUPDIVR_APB1DIV4
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#elif STR71X_APB1_DIV == 8
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# define APB1DIV STR71X_PCUPDIVR_APB1DIV8
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#else
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# error "Unsupported value for STR71X_APB1_DIV"
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#endif
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#if STR71X_APB2_DIV == 1
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# define APB2DIV STR71X_PCUPDIVR_APB2DIV1
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#elif STR71X_APB2_DIV == 2
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# define APB2DIV STR71X_PCUPDIVR_APB2DIV2
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#elif STR71X_APB2_DIV == 4
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# define APB2DIV STR71X_PCUPDIVR_APB2DIV4
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#elif STR71X_APB2_DIV == 8
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# define APB2DIV STR71X_PCUPDIVR_APB2DIV8
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#else
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# error "Unsupported value for STR71X_APB2_DIV"
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#endif
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#if STR71X_MCLK_DIV == 1
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# define MCLKDIV STR71X_PCUMDIVR_DIV1
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#elif STR71X_MCLK_DIV == 2
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# define MCLKDIV STR71X_PCUMDIVR_DIV2
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#elif STR71X_MCLK_DIV == 4
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# define MCLKDIV STR71X_PCUMDIVR_DIV4
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#elif STR71X_MCLK_DIV == 8
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# define MCLKDIV STR71X_PCUMDIVR_DIV8
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#else
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# error "Unsupported value for STR71X_MCLK_DIV"
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#endif
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#if STR71X_PLL2OUT_MUL == 12
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# define PLL2MUL STR71X_PCUPPL2CR_MUL12
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#elif STR71X_PLL2OUT_MUL == 16
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# define PLL2MUL STR71X_PCUPPL2CR_MUL16
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#elif STR71X_PLL2OUT_MUL == 20
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# define PLL2MUL STR71X_PCUPPL2CR_MUL20
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#else STR71X_PLL2OUT_MUL == 28
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# define PLL2MUL STR71X_PCUPPL2CR_MUL28
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#else
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# error "Unsupporetd value for STR71X_PLL2OUT_MUL"
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#endif
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#if STR71X_PLL2OUT_DIV == 1
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# define PLL2DIV STR71X_PCUPPL2CR_DIV1
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#elif STR71X_PLL2OUT_DIV == 2
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# define PLL2DIV STR71X_PCUPPL2CR_DIV2
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#elif STR71X_PLL2OUT_DIV == 3
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# define PLL2DIV STR71X_PCUPPL2CR_DIV3
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#elif STR71X_PLL2OUT_DIV == 4
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# define PLL2DIV STR71X_PCUPPL2CR_DIV4
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#elif STR71X_PLL2OUT_DIV == 5
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# define PLL2DIV STR71X_PCUPPL2CR_DIV5
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#elif STR71X_PLL2OUT_DIV == 6
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# define PLL2DIV STR71X_PCUPPL2CR_DIV6
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#elif STR71X_PLL2OUT_DIV == 7
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# define PLL2DIV STR71X_PCUPPL2CR_DIV7
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#else
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# error "Unsupported value for STR71X_PLL2OUT_DIV"
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#endif
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/********************************************************************************
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* Private Types
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********************************************************************************/
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/********************************************************************************
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* Public Data
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********************************************************************************/
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/********************************************************************************
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* Private Data
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********************************************************************************/
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/********************************************************************************
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* Private Functions
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********************************************************************************/
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/********************************************************************************
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* Public Funstions
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********************************************************************************/
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/********************************************************************************
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* Name: str71x_prccuinit
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*
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* Description:
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* Initialize the PCU/RCCU based on the NuttX configuration and the board-specific
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* settings in board.h
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*
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********************************************************************************/
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void str71x_prccuinit(void)
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{
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uint32 reg32;
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uint16 reg16;
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/* Divide RCLK to obtain PCLK1 & 2 clock for the APB1 & 2 peripherals. The divider
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* values are provided in board.h
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*/
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reg16 = getreg16(STR71X_PCU_PDIVR);
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reg16 &= ~(STR71X_PCUPDIVR_FACT1MASK|STR71X_PCUPDIVR_FACT2MASK);
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reg16 |= (APB1DIV|APB2DIV);
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putreg16(reg16, STR71X_PCU_PDIVR);
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/* Configure the main system clock (MCLK) divider with value from board.h */
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reg16 = getreg16(STR71X_PCU_MDIVR);
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reg16 &= ~STR71X_PCUMDIVR_FACTMASK;
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reg16 |= MCLKDIV;
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purreg16(reg16 , STR71X_PCU_MDIVR);
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/* Turn off the PLL1 by setting bits DX[2:0] */
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putreg32(STR71X_RCCUPLL1CR_CLK2, STR71X_RCCU_PLL1CR);
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/* Configure the PLL1CR register using the provided multiplier and
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* divider. The FREF_RANGE bit is also set if the input frequency
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* (CLK2) is greater than 3MHz.
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*/
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#if STR71X_PLL1_CLK2 > 3000000
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putreg32(PLL1MUL|PLL1DIV, STR71X_RCCU_PLL1CR);
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#else
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putreg32(PLL1MUL|PLL1DIV|STR71X_RCCUPLL1CR_FREFRANGE, STR71X_RCCU_PLL1CR);
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#endif
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/* Wait for the PLL to lock */
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while (getreg16(STR71X_RCCU_CFR) & STR71X_RCCUCFR_LOCK) == 0);
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/* Set the CK2_16 Bit in the CFR to use CLK2/PLL1OUT as CLK3 */
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reg32 = getreg32(STR71X_RCCU_CFR);
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putreg32(reg32 | STR71X_RCCUCFR_CK216, STR71X_RCCU_CFR);
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/* Wait for the PLL to lock */
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while (getreg16(STR71X_RCCU_CFR) & STR71X_RCCUCFR_LOCK) == 0);
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/* Select CLK3 (vs the alternative source) for RCLK in the clock
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* control register (CCR)
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*/
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reg16 = getreg16(STR71X_RCCU_CCR);
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reg16 &= ~STR71X_RCCUCCR_CKAFSEL
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putreg16(reg16, STR71X_RCCU_CCR);
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/* Select PLL1OUT as the CLK3 */
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reg32 = getreg32(STR71X_RCCU_CFR);
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putreg32(reg32 | STR71X_RCCUCFR_CSUCKSEL, STR71X_RCCU_CFR);
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/* Enable clocking on selected periperals */
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putreg32(APB1EN_ALL, STR71X_APB1_CKDIS);
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putreg32(APB2EN_ALL, STR71X_APB2_CKDIS);
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/* Configure PLL2 */
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#if defined(CONFIG_STR71X_HDLC) || (defined(CONFIG_STR71X_USB) && defined(STR71X_USBIN_PLL2))
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reg16 = getreg16(STR71X_PCU_PLL2CR);
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reg16 &= ~(STR71X_PCUPPL2CR_MXMASK|STR71X_PCUPPL2CR_DXMASK);
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reg16 |= (PLL2MUL|PLL2DIV);
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/* Set the PLL2 FRQRNG bit according to the PLL2 input frequency */
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#if STR71X_PCU_HCLK_OSC < 3000000
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reg16 &= ~STR71X_PCUPPL2CR_FRQRNG;
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#else
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reg16 |= STR71X_PCUPPL2CR_FRQRNG;
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#else
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putreg16(reg16, STR71X_PCU_PLL2CR);
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/* Wait for PLL2 to lock in */
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// while (getreg16(STR71X_PCU_PLL2CR) & STR71X_PCUPPL2CR_LOCK) == 0);
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#endif
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/* Select the USB clock source */
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#ifdef CONFIG_STR71X_USB
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reg16 = getreg16(STR71X_PCU_PLL2CR);
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#ifdef STR71X_USBIN_PLL2
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/* PLL2 is the clock source to the USB */
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reg16 |= STR71X_PCUPPL2CR_USBEN;
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#else
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/* USBCLK pin is the clock source to the USB */
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reg16 &= ~STR71X_PCUPPL2CR_USBEN;
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#endif
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putreg16(reg16, STR71X_PCU_PLL2CR);
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#endif
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}
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