Diff: targets/TARGET_Maxim/TARGET_MAX32630/mxc/clkman.c

Revision:

157:ff67d9f36b67

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Maxim/TARGET_MAX32630/mxc/clkman.c	Thu Feb 02 17:01:33 2017 +0000
@@ -0,0 +1,185 @@
+/**
+ * @file
+ * @brief   System Clock Management (CLKMAN) Function Implementations. 
+ */
+/* *****************************************************************************
+ * Copyright (C) 2016 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.
+ *
+ * $Date: 2016-08-15 11:08:12 -0500 (Mon, 15 Aug 2016) $
+ * $Revision: 24058 $
+ *
+ **************************************************************************** */
+
+/* **** Includes **** */
+#include "mxc_config.h"
+#include "mxc_assert.h"
+#include "clkman.h"
+#include "pwrseq_regs.h"
+
+ /**
+ * @ingroup clkman 
+ * @{
+ */ 
+
+/* ************************************************************************* */
+void CLKMAN_SetSystemClock(clkman_system_source_select_t select, clkman_system_scale_t scale)
+{
+    MXC_CLKMAN->clk_ctrl = ((MXC_CLKMAN->clk_ctrl & ~MXC_F_CLKMAN_CLK_CTRL_SYSTEM_SOURCE_SELECT) |
+                            (MXC_V_CLKMAN_CLK_CTRL_SYSTEM_SOURCE_SELECT_96MHZ_RO));
+
+    switch(select) {
+        case CLKMAN_SYSTEM_SOURCE_96MHZ:
+        default:
+            // Enable and select the 96MHz oscillator
+            MXC_PWRSEQ->reg0 |= (MXC_F_PWRSEQ_REG0_PWR_ROEN_RUN);
+            MXC_PWRSEQ->reg0 &= ~(MXC_F_PWRSEQ_REG0_PWR_OSC_SELECT);
+
+            // Disable the 4MHz oscillator
+            MXC_PWRSEQ->reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_RCEN_RUN;
+
+            // Divide the system clock by the scale
+            MXC_PWRSEQ->reg3 = ((MXC_PWRSEQ->reg3 & ~MXC_F_PWRSEQ_REG3_PWR_RO_DIV) |
+                                (scale << MXC_F_PWRSEQ_REG3_PWR_RO_DIV_POS));
+
+            break;
+        case CLKMAN_SYSTEM_SOURCE_4MHZ:
+            // Enable and select the 4MHz oscillator
+            MXC_PWRSEQ->reg0 |= (MXC_F_PWRSEQ_REG0_PWR_RCEN_RUN);
+            MXC_PWRSEQ->reg0 |= (MXC_F_PWRSEQ_REG0_PWR_OSC_SELECT);
+
+            // Disable the 96MHz oscillator
+            MXC_PWRSEQ->reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_ROEN_RUN;
+
+            // 4MHz System source can only be divided down by a maximum factor of 8
+            MXC_ASSERT(scale <= CLKMAN_SYSTEM_SCALE_DIV_8);
+
+            // Divide the system clock by the scale
+            MXC_PWRSEQ->reg3 = ((MXC_PWRSEQ->reg3 & ~MXC_F_PWRSEQ_REG3_PWR_RC_DIV) |
+                                (scale << MXC_F_PWRSEQ_REG3_PWR_RC_DIV_POS));
+            break;
+    }
+
+    SystemCoreClockUpdate();
+}
+
+/* ************************************************************************* */
+void CLKMAN_CryptoClockEnable(int enable)
+{
+    if (enable) {
+        /* Enable oscillator */
+        MXC_CLKMAN->clk_config |= MXC_F_CLKMAN_CLK_CONFIG_CRYPTO_ENABLE;
+        /* Un-gate clock to TPU modules */
+        MXC_CLKMAN->clk_ctrl |= MXC_F_CLKMAN_CLK_CTRL_CRYPTO_CLOCK_ENABLE;
+    } else {
+        /* Gate clock off */
+        MXC_CLKMAN->clk_ctrl &= ~MXC_F_CLKMAN_CLK_CTRL_CRYPTO_CLOCK_ENABLE;
+        /* Disable oscillator */
+        MXC_CLKMAN->clk_config &= ~MXC_F_CLKMAN_CLK_CONFIG_CRYPTO_ENABLE;
+    }
+}
+
+/* ************************************************************************* */
+void CLKMAN_SetClkScale(clkman_clk_t clk, clkman_scale_t scale)
+{
+    volatile uint32_t *clk_ctrl_reg;
+
+    MXC_ASSERT(clk <= CLKMAN_CLK_MAX);
+    MXC_ASSERT(scale != CLKMAN_SCALE_AUTO);
+
+    if (clk < CLKMAN_CRYPTO_CLK_AES) {
+        clk_ctrl_reg = &MXC_CLKMAN->sys_clk_ctrl_0_cm4 + clk;
+    } else {
+        clk_ctrl_reg = &MXC_CLKMAN->crypt_clk_ctrl_0_aes + (clk - CLKMAN_CRYPTO_CLK_AES);
+    }
+
+    *clk_ctrl_reg = scale;
+}
+
+/* ************************************************************************* */
+clkman_scale_t CLKMAN_GetClkScale(clkman_clk_t clk)
+{
+    volatile uint32_t *clk_ctrl_reg;
+    MXC_ASSERT(clk <= CLKMAN_CLK_MAX);
+
+    if (clk < CLKMAN_CRYPTO_CLK_AES) {
+        clk_ctrl_reg = &MXC_CLKMAN->sys_clk_ctrl_0_cm4 + clk;
+    } else {
+        clk_ctrl_reg = &MXC_CLKMAN->crypt_clk_ctrl_0_aes + (clk - CLKMAN_CRYPTO_CLK_AES);
+    }
+
+    return (clkman_scale_t)*clk_ctrl_reg;
+}
+
+/* ************************************************************************* */
+void CLKMAN_ClockGate(clkman_enable_clk_t clk, int enable)
+{
+    if (enable) {
+        MXC_CLKMAN->clk_ctrl |= clk;
+    } else {
+        MXC_CLKMAN->clk_ctrl &= ~clk;
+    }
+}
+
+/* ************************************************************************ */
+int CLKMAN_WdtClkSelect(unsigned int idx, clkman_wdt_clk_select_t select)
+{
+    MXC_ASSERT(idx < MXC_CFG_WDT_INSTANCES);
+
+    if (select == CLKMAN_WDT_SELECT_DISABLED) {
+        if (idx == 0) {
+            MXC_CLKMAN->clk_ctrl &= ~MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_ENABLE;
+        } else if (idx == 1) {
+            MXC_CLKMAN->clk_ctrl &= ~MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_ENABLE;
+        } else {
+            return E_BAD_PARAM;
+        }
+    } else {
+        if (idx == 0) {
+            MXC_CLKMAN->clk_ctrl = (MXC_CLKMAN->clk_ctrl & ~MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_SELECT) |
+                                   MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_ENABLE |
+                                   ((select << MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_SELECT_POS) & MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_SELECT);
+        } else if (idx == 1) {
+            MXC_CLKMAN->clk_ctrl = (MXC_CLKMAN->clk_ctrl & ~MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_SELECT) |
+                                   MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_ENABLE |
+                                   ((select << MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_SELECT_POS) & MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_SELECT);
+        } else {
+            return E_BAD_PARAM;
+        }
+    }
+
+    return E_NO_ERROR;
+}
+
+/* ************************************************************************* */
+/* NOTE: CLKMAN_TrimRO() is implemented in system_max32XXX.c                 */
+/* ************************************************************************* */
+
+/**@} end of group clkman */