Import Mbed OS hard-float snapshot

targets/TARGET_Maxim/TARGET_MAX32610/device/system_max32610.c

@@ -0,0 +1,200 @@
+/*******************************************************************************
+ * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *******************************************************************************
+ */
+
+#include "max32610.h"
+#include "clkman_regs.h"
+#include "pwrman_regs.h"
+#include "ioman_regs.h"
+#include "trim_regs.h"
+#include "flc_regs.h"
+#include "pwrseq_regs.h"
+#include "dac_regs.h"
+#include "icc_regs.h"
+#include "adc_regs.h"
+
+/* Application developer should override where necessary with different external HFX source */
+#ifndef __SYSTEM_HFX
+#define __SYSTEM_HFX 24000000
+#endif
+
+uint32_t SystemCoreClock = 24000000;
+
+void SystemCoreClockUpdate(void)
+{
+    switch ((MXC_CLKMAN->clk_ctrl & MXC_F_CLKMAN_CLK_CTRL_SYSTEM_SOURCE_SELECT) >> MXC_F_CLKMAN_CLK_CTRL_SYSTEM_SOURCE_SELECT_POS) {
+        case MXC_E_CLKMAN_SYSTEM_SOURCE_SELECT_24MHZ_RO_DIV_8:
+            SystemCoreClock = 3000000;
+            break;
+        case MXC_E_CLKMAN_SYSTEM_SOURCE_SELECT_24MHZ_RO:
+        case MXC_E_CLKMAN_SYSTEM_SOURCE_SELECT_PLL_48MHZ_DIV_2:
+            SystemCoreClock = 24000000;
+            break;
+        case MXC_E_CLKMAN_SYSTEM_SOURCE_SELECT_HFX:
+            SystemCoreClock = __SYSTEM_HFX;
+            break;
+    }
+
+    uint32_t shift = MXC_CLKMAN->clk_ctrl_0_system;
+    if (shift) {
+        SystemCoreClock = SystemCoreClock >> (shift - 1);
+    }
+}
+
+/* power seq registers */
+static void set_pwr_regs(void)
+{
+    uint32_t dac2trim =  MXC_DAC2->reg & 0xff00ffff;
+    uint32_t dac3trim =  MXC_DAC3->reg & 0xff00ffff;
+    dac2trim = dac2trim + MXC_TRIM->trim_reg_36;
+    dac3trim = dac3trim + MXC_TRIM->trim_reg_37;
+    if ((MXC_TRIM->trim_reg_13 != 0) && (MXC_TRIM->trim_reg_13 != 0xFFFFFFFF)) {
+        MXC_PWRSEQ->reg5 = MXC_TRIM->trim_reg_13;
+    }
+    if ((MXC_TRIM->trim_reg_14 != 0) && (MXC_TRIM->trim_reg_14 != 0xFFFFFFFF)) {
+        MXC_PWRSEQ->reg6 = MXC_TRIM->trim_reg_14;
+    }
+    MXC_DAC0->trm = MXC_TRIM->trim_reg_34;
+    MXC_DAC1->trm = MXC_TRIM->trim_reg_35;
+    MXC_DAC2->reg = dac2trim;
+    MXC_DAC3->reg = dac3trim;
+}
+
+void ICC_Enable(void)
+{
+    /* clock gater must be 'on' not 'dynamic' for cache control */
+    uint32_t temp = MXC_CLKMAN->clk_gate_ctrl0;
+    temp &= ~MXC_F_CLKMAN_CLK_GATE_CTRL0_ICACHE_CLK_GATER;
+    temp |= (MXC_E_CLKMAN_CLK_GATE_ON << MXC_F_CLKMAN_CLK_GATE_CTRL0_ICACHE_CLK_GATER_POS);
+    MXC_CLKMAN->clk_gate_ctrl0 = temp;
+
+
+    /* invalidate, wait, enable */
+    MXC_ICC->invdt_all = 0xFFFF;
+    while(!(MXC_ICC->ctrl_stat & MXC_F_ICC_CTRL_STAT_READY));
+    MXC_ICC->ctrl_stat |= MXC_F_ICC_CTRL_STAT_ENABLE;
+
+    /* must invalidate a second time for proper use */
+    MXC_ICC->invdt_all = 1;
+
+    /* clock gater 'dynamic' safe again */
+    temp = MXC_CLKMAN->clk_gate_ctrl0;
+    temp &= ~MXC_F_CLKMAN_CLK_GATE_CTRL0_ICACHE_CLK_GATER;
+    temp |= (MXC_E_CLKMAN_CLK_GATE_DYNAMIC << MXC_F_CLKMAN_CLK_GATE_CTRL0_ICACHE_CLK_GATER_POS);
+    MXC_CLKMAN->clk_gate_ctrl0 = temp;
+}
+
+void Trim_RO(void)
+{
+    uint32_t reg0;
+    uint32_t trim;
+
+    // Save the RTCEN_RUN state and set it
+    reg0 = MXC_PWRSEQ->reg0;
+    MXC_PWRSEQ->reg0 |= MXC_F_PWRSEQ_REG0_PWR_RTCEN_RUN;
+
+    /* needed if parts are untrimmed */
+    if ((MXC_TRIM->trim_reg_13 == 0) || (MXC_TRIM->trim_reg_13 == 0xFFFFFFFF)) {
+        MXC_PWRSEQ->reg5 = (MXC_PWRSEQ->reg5 & ~MXC_F_PWRSEQ_REG5_PWR_TRIM_OSC_VREF) | (16 << MXC_F_PWRSEQ_REG5_PWR_TRIM_OSC_VREF_POS);
+    }
+    trim = (MXC_PWRSEQ->reg5 & MXC_F_PWRSEQ_REG5_PWR_TRIM_OSC_VREF) >> (MXC_F_PWRSEQ_REG5_PWR_TRIM_OSC_VREF_POS - 2);
+    MXC_ADCCFG->ro_cal1 = (MXC_ADCCFG->ro_cal1 & ~MXC_F_ADC_RO_CAL1_TRM_INIT) |
+                          ((trim << MXC_F_ADC_RO_CAL1_TRM_INIT_POS) & MXC_F_ADC_RO_CAL1_TRM_INIT);
+    MXC_ADCCFG->ro_cal0 = (MXC_ADCCFG->ro_cal0 & ~MXC_F_ADC_RO_CAL0_TRM_MU) | (0x04 << MXC_F_ADC_RO_CAL0_TRM_MU_POS);
+    MXC_SETBIT(&MXC_ADCCFG->ro_cal0, MXC_F_ADC_RO_CAL0_RO_CAL_LOAD_POS);
+    MXC_SETBIT(&MXC_ADCCFG->ro_cal0, MXC_F_ADC_RO_CAL0_RO_CAL_EN_POS);
+    MXC_SETBIT(&MXC_ADCCFG->ro_cal0, MXC_F_ADC_RO_CAL0_RO_CAL_RUN_POS);
+
+    SysTick->LOAD = 1635;   /* about 50ms, based on a 32KHz systick clock */
+    SysTick->VAL = 0;
+    SysTick->CTRL = SysTick_CTRL_ENABLE_Msk;    /* Enable SysTick Timer */   
+    while(SysTick->VAL == 0);
+    while(!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk));
+    SysTick->CTRL = 0;
+
+    trim = (MXC_ADCCFG->ro_cal0 & MXC_F_ADC_RO_CAL0_RO_TRM) >> (MXC_F_ADC_RO_CAL0_RO_TRM_POS + 2);
+    MXC_CLRBIT(&MXC_ADCCFG->ro_cal0, MXC_F_ADC_RO_CAL0_RO_CAL_EN_POS);
+    MXC_PWRSEQ->reg5 = (MXC_PWRSEQ->reg5 & ~MXC_F_PWRSEQ_REG5_PWR_TRIM_OSC_VREF) |
+                       ((trim << MXC_F_PWRSEQ_REG5_PWR_TRIM_OSC_VREF_POS) & MXC_F_PWRSEQ_REG5_PWR_TRIM_OSC_VREF);
+
+    // Restore the RTCEN_RUN state
+    if (!(reg0 & MXC_F_PWRSEQ_REG0_PWR_RTCEN_RUN)) {
+        MXC_PWRSEQ->reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_RTCEN_RUN;
+    }
+}
+
+// This function to be implemented by the hal
+extern void low_level_init(void);
+
+void SystemInit(void)
+{
+    set_pwr_regs();
+
+    // Turn off PADX
+    MXC_IOMAN->padx_control = 0x00000441;
+
+    // Enable instruction cache
+    ICC_Enable();
+
+    low_level_init();
+
+    // Clear IO Active
+    MXC_PWRMAN->pwr_rst_ctrl = (MXC_F_PWRMAN_PWR_RST_CTRL_FLASH_ACTIVE |
+                                MXC_F_PWRMAN_PWR_RST_CTRL_SRAM_ACTIVE);
+
+    // Set WUD Clear
+    MXC_PWRMAN->pwr_rst_ctrl = (MXC_F_PWRMAN_PWR_RST_CTRL_FLASH_ACTIVE |
+                                MXC_F_PWRMAN_PWR_RST_CTRL_SRAM_ACTIVE |
+                                MXC_F_PWRMAN_PWR_RST_CTRL_WUD_CLEAR);
+
+    // Set IO Active
+    MXC_PWRMAN->pwr_rst_ctrl = (MXC_F_PWRMAN_PWR_RST_CTRL_FLASH_ACTIVE |
+                                MXC_F_PWRMAN_PWR_RST_CTRL_SRAM_ACTIVE |
+                                MXC_F_PWRMAN_PWR_RST_CTRL_IO_ACTIVE |
+                                MXC_F_PWRMAN_PWR_RST_CTRL_PULLUPS_ENABLED);
+
+    // Clear the first boot flag. Use low_level_init() if special handling is required.
+    MXC_PWRSEQ->reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_FIRST_BOOT;
+
+    // Enable the regulator
+    MXC_PWRSEQ->reg0 |= MXC_F_PWRSEQ_REG0_PWR_CHZYEN_RUN;
+
+    // Mask all wakeups
+    MXC_PWRSEQ->msk_flags = 0xFFFFFFFF;
+
+    // Set systick to the RTC input 32.768kHz clock, not system clock; this is needed to keep JTAG alive during sleep
+    MXC_CLKMAN->clk_ctrl |= MXC_F_CLKMAN_CLK_CTRL_RTOS_MODE;
+
+    SystemCoreClockUpdate();
+
+    Trim_RO();
+}