From 273a2b0d87cc6bde28cbae477afc313f017b4d3a Mon Sep 17 00:00:00 2001 From: patacongo Date: Sat, 22 Sep 2012 15:12:50 +0000 Subject: Make the Olimex stm32 p107 clock configuratin the standard for connectivity line devices git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5175 42af7a65-404d-4744-a932-0658087f49c3 --- nuttx/arch/arm/src/stm32/stm32f10xxx_rcc.c | 127 +++++++++++++++++++++++++++-- 1 file changed, 121 insertions(+), 6 deletions(-) (limited to 'nuttx/arch/arm/src/stm32/stm32f10xxx_rcc.c') diff --git a/nuttx/arch/arm/src/stm32/stm32f10xxx_rcc.c b/nuttx/arch/arm/src/stm32/stm32f10xxx_rcc.c index 10b8572cf..47ed5e016 100644 --- a/nuttx/arch/arm/src/stm32/stm32f10xxx_rcc.c +++ b/nuttx/arch/arm/src/stm32/stm32f10xxx_rcc.c @@ -90,7 +90,7 @@ static inline void rcc_reset(void) regval = getreg32(STM32_RCC_CR); /* Reset HSEBYP bit */ regval &= ~RCC_CR_HSEBYP; putreg32(regval, STM32_RCC_CR); - + regval = getreg32(STM32_RCC_CFGR); /* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */ regval &= ~(RCC_CFGR_PLLSRC|RCC_CFGR_PLLXTPRE|RCC_CFGR_PLLMUL_MASK|RCC_CFGR_USBPRE); putreg32(regval, STM32_RCC_CFGR); @@ -235,7 +235,7 @@ static inline void rcc_enableapb1(void) regval |= RCC_APB1ENR_SPI2EN; #endif - + #ifdef CONFIG_STM32_SPI3 /* SPI 3 clock enable */ @@ -411,13 +411,128 @@ static inline void rcc_enableapb2(void) * Name: stm32_stdclockconfig * * Description: - * Called to change to new clock based on settings in board.h - * + * Called to change to new clock based on settings in board.h. This + * version is for the Connectivity Line parts. + * + * NOTE: This logic would need to be extended if you need to select low- + * power clocking modes! + ****************************************************************************/ + +#if !defined(CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG) && defined(CONFIG_STM32_CONNECTIVITYLINE) +static void stm32_stdclockconfig(void) +{ + uint32_t regval; + + /* Enable HSE */ + + regval = getreg32(STM32_RCC_CR); + regval &= ~RCC_CR_HSEBYP; /* Disable HSE clock bypass */ + regval |= RCC_CR_HSEON; /* Enable HSE */ + putreg32(regval, STM32_RCC_CR); + + /* Set flash wait states + * Sysclk runs with 72MHz -> 2 waitstates. + * 0WS from 0-24MHz + * 1WS from 24-48MHz + * 2WS from 48-72MHz + */ + + regval = getreg32(STM32_FLASH_ACR); + regval &= ~FLASH_ACR_LATENCY_MASK; + regval |= (FLASH_ACR_LATENCY_2|FLASH_ACR_PRTFBE); + putreg32(regval, STM32_FLASH_ACR); + + /* Set up PLL input scaling (with source = PLL2) */ + + regval = getreg32(STM32_RCC_CFGR2); + regval &= ~(RCC_CFGR2_PREDIV2_MASK | RCC_CFGR2_PLL2MUL_MASK | + RCC_CFGR2_PREDIV1SRC_MASK | RCC_CFGR2_PREDIV1_MASK); + regval |= (STM32_PLL_PREDIV2 | STM32_PLL_PLL2MUL | + RCC_CFGR2_PREDIV1SRC_PLL2 | STM32_PLL_PREDIV1); + putreg32(regval, STM32_RCC_CFGR2); + + /* Set the PCLK2 divider */ + + regval = getreg32(STM32_RCC_CFGR); + regval &= ~(RCC_CFGR_PPRE2_MASK | RCC_CFGR_HPRE_MASK); + regval |= STM32_RCC_CFGR_PPRE2; + regval |= RCC_CFGR_HPRE_SYSCLK; + putreg32(regval, STM32_RCC_CFGR); + + /* Set the PCLK1 divider */ + + regval = getreg32(STM32_RCC_CFGR); + regval &= ~RCC_CFGR_PPRE1_MASK; + regval |= STM32_RCC_CFGR_PPRE1; + putreg32(regval, STM32_RCC_CFGR); + + /* Enable PLL2 */ + + regval = getreg32(STM32_RCC_CR); + regval |= RCC_CR_PLL2ON; + putreg32(regval, STM32_RCC_CR); + + /* Wait for PLL2 ready */ + + while((getreg32(STM32_RCC_CR) & RCC_CR_PLL2RDY) == 0); + + /* Setup PLL3 for MII/RMII clock on MCO */ + +#if defined(CONFIG_STM32_MII_MCO) || defined(CONFIG_STM32_RMII_MCO) + regval = getreg32(STM32_RCC_CFGR2); + regval &= ~(RCC_CFGR2_PLL3MUL_MASK); + regval |= STM32_PLL_PLL3MUL; + putreg32(regval, STM32_RCC_CFGR2); + + /* Switch PLL3 on */ + + regval = getreg32(STM32_RCC_CR); + regval |= RCC_CR_PLL3ON; + putreg32(regval, STM32_RCC_CR); + + while ((getreg32(STM32_RCC_CR) & RCC_CR_PLL3RDY) == 0); +#endif + + /* Set main PLL source and multiplier */ + + regval = getreg32(STM32_RCC_CFGR); + regval &= ~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLMUL_MASK); + regval |= (RCC_CFGR_PLLSRC | STM32_PLL_PLLMUL); + putreg32(regval, STM32_RCC_CFGR); + + /* Switch main PLL on */ + + regval = getreg32(STM32_RCC_CR); + regval |= RCC_CR_PLLON; + putreg32(regval, STM32_RCC_CR); + + while ((getreg32(STM32_RCC_CR) & RCC_CR_PLLRDY) == 0); + + /* Select PLL as system clock source */ + + regval = getreg32(STM32_RCC_CFGR); + regval &= ~RCC_CFGR_SW_MASK; + regval |= RCC_CFGR_SW_PLL; + putreg32(regval, STM32_RCC_CFGR); + + /* Wait until PLL is used as the system clock source */ + + while ((getreg32(STM32_RCC_CFGR) & RCC_CFGR_SWS_PLL) == 0); +} +#endif + +/**************************************************************************** + * Name: stm32_stdclockconfig + * + * Description: + * Called to change to new clock based on settings in board.h. This + * version is for the non-Connectivity Line parts. + * * NOTE: This logic would need to be extended if you need to select low- * power clocking modes! ****************************************************************************/ -#ifndef CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG +#if !defined(CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG) && !defined(CONFIG_STM32_CONNECTIVITYLINE) static void stm32_stdclockconfig(void) { uint32_t regval; @@ -430,7 +545,7 @@ static void stm32_stdclockconfig(void) volatile int32_t timeout; /* Enable External High-Speed Clock (HSE) */ - + regval = getreg32(STM32_RCC_CR); regval &= ~RCC_CR_HSEBYP; /* Disable HSE clock bypass */ regval |= RCC_CR_HSEON; /* Enable HSE */ -- cgit v1.2.3