66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* Copyright (c) 2016 Brian Swetland
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#include <lk/debug.h>
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#include <platform.h>
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#include <arch/arm/cm.h>
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#include <driverlib/prcm.h>
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#include <driverlib/ioc.h>
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#include <driverlib/uart.h>
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#include <driverlib/osc.h>
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// if GPIO_UART_?R are defined, route UART there
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#include <target/gpioconfig.h>
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void trimDevice(void);
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#define UART0_BASE 0x40001000
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void platform_early_init(void) {
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trimDevice();
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PRCMPowerDomainOn(PRCM_DOMAIN_SERIAL);
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while (PRCMPowerDomainStatus(PRCM_DOMAIN_SERIAL) != PRCM_DOMAIN_POWER_ON) ;
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PRCMPowerDomainOn(PRCM_DOMAIN_PERIPH);
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while (PRCMPowerDomainStatus(PRCM_DOMAIN_PERIPH) != PRCM_DOMAIN_POWER_ON) ;
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PRCMPeripheralRunEnable(PRCM_PERIPH_UART0);
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PRCMPeripheralRunEnable(PRCM_PERIPH_GPIO);
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PRCMLoadSet();
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#ifdef GPIO_UART_TX
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IOCPortConfigureSet(GPIO_UART_TX, IOC_PORT_MCU_UART0_TX, 0);
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#endif
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#ifdef GPIO_UART_RX
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IOCPortConfigureSet(GPIO_UART_RX, IOC_PORT_MCU_UART0_RX, IOC_INPUT_ENABLE);
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#endif
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UARTConfigSetExpClk(UART0_BASE, 48000000, 115200,
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UART_CONFIG_WLEN_8 | UART_CONFIG_PAR_NONE | UART_CONFIG_STOP_ONE);
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UARTEnable(UART0_BASE);
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arm_cm_systick_init(48000000);
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// switch to 24MHz XOSC
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OSCInterfaceEnable();
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OSCClockSourceSet(OSC_SRC_CLK_HF, OSC_XOSC_HF);
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OSCHfSourceSwitch();
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#if 0
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dprintf(INFO, "hf clk src %d\n", OSCClockSourceGet(OSC_SRC_CLK_HF));
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dprintf(INFO, "mf clk src %d\n", OSCClockSourceGet(OSC_SRC_CLK_MF));
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dprintf(INFO, "lf clk src %d\n", OSCClockSourceGet(OSC_SRC_CLK_LF));
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#endif
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}
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void platform_init(void) {
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}
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