mirror of https://github.com/ARMmbed/mbed-os.git
173 lines
6.9 KiB
C
173 lines
6.9 KiB
C
/*******************************************************************************
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* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of Maxim Integrated
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* Products, Inc. shall not be used except as stated in the Maxim Integrated
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* Products, Inc. Branding Policy.
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*
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* The mere transfer of this software does not imply any licenses
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* of trade secrets, proprietary technology, copyrights, patents,
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* trademarks, maskwork rights, or any other form of intellectual
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* property whatsoever. Maxim Integrated Products, Inc. retains all
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* ownership rights.
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*
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* $Date: 2016-04-27 09:12:45 -0500 (Wed, 27 Apr 2016) $
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* $Revision: 22531 $
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*
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******************************************************************************/
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#include "mxc_config.h"
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#include "mxc_assert.h"
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#include "clkman.h"
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#include "pwrseq_regs.h"
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/******************************************************************************/
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void CLKMAN_SetSystemClock(clkman_system_source_select_t select, clkman_system_scale_t scale)
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{
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MXC_CLKMAN->clk_ctrl = ((MXC_CLKMAN->clk_ctrl & ~MXC_F_CLKMAN_CLK_CTRL_SYSTEM_SOURCE_SELECT) |
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(MXC_V_CLKMAN_CLK_CTRL_SYSTEM_SOURCE_SELECT_96MHZ_RO));
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switch(select) {
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case CLKMAN_SYSTEM_SOURCE_96MHZ:
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default:
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// Enable and select the 96MHz oscillator
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MXC_PWRSEQ->reg0 |= (MXC_F_PWRSEQ_REG0_PWR_ROEN_RUN);
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MXC_PWRSEQ->reg0 &= ~(MXC_F_PWRSEQ_REG0_PWR_OSC_SELECT);
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// Disable the 4MHz oscillator
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MXC_PWRSEQ->reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_RCEN_RUN;
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// Divide the system clock by the scale
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MXC_PWRSEQ->reg3 = ((MXC_PWRSEQ->reg3 & ~MXC_F_PWRSEQ_REG3_PWR_RO_DIV) |
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(scale << MXC_F_PWRSEQ_REG3_PWR_RO_DIV_POS));
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break;
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case CLKMAN_SYSTEM_SOURCE_4MHZ:
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// Enable and select the 4MHz oscillator
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MXC_PWRSEQ->reg0 |= (MXC_F_PWRSEQ_REG0_PWR_RCEN_RUN);
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MXC_PWRSEQ->reg0 |= (MXC_F_PWRSEQ_REG0_PWR_OSC_SELECT);
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// Disable the 96MHz oscillator
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MXC_PWRSEQ->reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_ROEN_RUN;
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// 4MHz System source can only be divided down by a maximum factor of 8
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MXC_ASSERT(scale <= CLKMAN_SYSTEM_SCALE_DIV_8);
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// Divide the system clock by the scale
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MXC_PWRSEQ->reg3 = ((MXC_PWRSEQ->reg3 & ~MXC_F_PWRSEQ_REG3_PWR_RC_DIV) |
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(scale << MXC_F_PWRSEQ_REG3_PWR_RC_DIV_POS));
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break;
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}
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SystemCoreClockUpdate();
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}
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/******************************************************************************/
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void CLKMAN_CryptoClockEnable(int enable)
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{
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if (enable) {
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/* Enable oscillator */
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MXC_CLKMAN->clk_config |= MXC_F_CLKMAN_CLK_CONFIG_CRYPTO_ENABLE;
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/* Un-gate clock to TPU modules */
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MXC_CLKMAN->clk_ctrl |= MXC_F_CLKMAN_CLK_CTRL_CRYPTO_CLOCK_ENABLE;
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} else {
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/* Gate clock off */
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MXC_CLKMAN->clk_ctrl &= ~MXC_F_CLKMAN_CLK_CTRL_CRYPTO_CLOCK_ENABLE;
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/* Disable oscillator */
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MXC_CLKMAN->clk_config &= ~MXC_F_CLKMAN_CLK_CONFIG_CRYPTO_ENABLE;
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}
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}
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/******************************************************************************/
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void CLKMAN_SetClkScale(clkman_clk_t clk, clkman_scale_t scale)
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{
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volatile uint32_t *clk_ctrl_reg;
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MXC_ASSERT(clk <= CLKMAN_CLK_MAX);
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MXC_ASSERT(scale != CLKMAN_SCALE_AUTO);
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if (clk < CLKMAN_CRYPTO_CLK_AES) {
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clk_ctrl_reg = &MXC_CLKMAN->sys_clk_ctrl_0_cm4 + clk;
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} else {
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clk_ctrl_reg = &MXC_CLKMAN->crypt_clk_ctrl_0_aes + (clk - CLKMAN_CRYPTO_CLK_AES);
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}
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*clk_ctrl_reg = scale;
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}
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/******************************************************************************/
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clkman_scale_t CLKMAN_GetClkScale(clkman_clk_t clk)
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{
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volatile uint32_t *clk_ctrl_reg;
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MXC_ASSERT(clk <= CLKMAN_CLK_MAX);
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if (clk < CLKMAN_CRYPTO_CLK_AES) {
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clk_ctrl_reg = &MXC_CLKMAN->sys_clk_ctrl_0_cm4 + clk;
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} else {
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clk_ctrl_reg = &MXC_CLKMAN->crypt_clk_ctrl_0_aes + (clk - CLKMAN_CRYPTO_CLK_AES);
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}
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return (clkman_scale_t)*clk_ctrl_reg;
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}
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/******************************************************************************/
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void CLKMAN_ClockGate(clkman_enable_clk_t clk, int enable)
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{
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if (enable) {
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MXC_CLKMAN->clk_ctrl |= clk;
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} else {
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MXC_CLKMAN->clk_ctrl &= ~clk;
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}
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}
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/******************************************************************************/
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int CLKMAN_WdtClkSelect(unsigned int idx, clkman_wdt_clk_select_t select)
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{
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MXC_ASSERT(idx < MXC_CFG_WDT_INSTANCES);
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if (select == CLKMAN_WDT_SELECT_DISABLED) {
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if (idx == 0) {
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MXC_CLKMAN->clk_ctrl &= ~MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_ENABLE;
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} else if (idx == 1) {
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MXC_CLKMAN->clk_ctrl &= ~MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_ENABLE;
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} else {
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return E_BAD_PARAM;
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}
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} else {
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if (idx == 0) {
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MXC_CLKMAN->clk_ctrl = (MXC_CLKMAN->clk_ctrl & ~MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_SELECT) |
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MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_ENABLE |
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((select << MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_SELECT_POS) & MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_SELECT);
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} else if (idx == 1) {
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MXC_CLKMAN->clk_ctrl = (MXC_CLKMAN->clk_ctrl & ~MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_SELECT) |
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MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_ENABLE |
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((select << MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_SELECT_POS) & MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_SELECT);
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} else {
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return E_BAD_PARAM;
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}
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}
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return E_NO_ERROR;
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}
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/******************************************************************************/
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/* NOTE: CLKMAN_TrimRO() is implemented in system_max32XXX.c */
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/******************************************************************************/
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