1 /*
2 ** ###################################################################
3 ** Processors: MIMX8ML6CVNKZ
4 ** MIMX8ML6DVNLZ
5 **
6 ** Compilers: GNU C Compiler
7 ** IAR ANSI C/C++ Compiler for ARM
8 ** Keil ARM C/C++ Compiler
9 **
10 ** Reference manual: IMX8MPRM, Rev.D, 12/2020
11 ** Version: rev. 5.0, 2021-03-01
12 ** Build: b210301
13 **
14 ** Abstract:
15 ** Provides a system configuration function and a global variable that
16 ** contains the system frequency. It configures the device and initializes
17 ** the oscillator (PLL) that is part of the microcontroller device.
18 **
19 ** Copyright 2016 Freescale Semiconductor, Inc.
20 ** Copyright 2016-2021 NXP
21 ** All rights reserved.
22 **
23 ** SPDX-License-Identifier: BSD-3-Clause
24 **
25 ** http: www.nxp.com
26 ** mail: support@nxp.com
27 **
28 ** Revisions:
29 ** - rev. 1.0 (2019-10-11)
30 ** Initial version.
31 ** - rev. 2.0 (2020-02-21)
32 ** Rev.B Header.
33 ** - rev. 3.0 (2020-06-22)
34 ** Rev.C Header.
35 ** - rev. 4.0 (2020-11-16)
36 ** Rev.D Header.
37 ** - rev. 5.0 (2021-03-01)
38 ** Rev.D Header Final.
39 **
40 ** ###################################################################
41 */
42
43 /*!
44 * @file MIMX8ML6_cm7
45 * @version 5.0
46 * @date 2021-03-01
47 * @brief Device specific configuration file for MIMX8ML6_cm7 (implementation
48 * file)
49 *
50 * Provides a system configuration function and a global variable that contains
51 * the system frequency. It configures the device and initializes the oscillator
52 * (PLL) that is part of the microcontroller device.
53 */
54
55 #include <stdint.h>
56 #include "fsl_device_registers.h"
57
58 /*!
59 * @brief CCM reg macros to extract corresponding registers bit field.
60 */
61 #define CCM_BIT_FIELD_VAL(val, mask, shift) (((val)&mask) >> shift)
62
63 /*!
64 * @brief CCM reg macros to get corresponding registers values.
65 */
66 #define CCM_ANALOG_REG_VAL(base, off) (*((volatile uint32_t *)((uint32_t)(base) + (off))))
67
68 /*******************************************************************************
69 * Prototypes
70 ******************************************************************************/
71 uint32_t GetFracPllFreq(const volatile uint32_t *base);
72 uint32_t GetIntegerPllFreq(const volatile uint32_t *base);
73
GetFracPllFreq(const volatile uint32_t * base)74 uint32_t GetFracPllFreq(const volatile uint32_t *base)
75 {
76 uint32_t fracCfg0 = CCM_ANALOG_REG_VAL(base, 0U);
77 uint32_t fracCfg1 = CCM_ANALOG_REG_VAL(base, 4U);
78 uint32_t fracCfg2 = CCM_ANALOG_REG_VAL(base, 8U);
79 uint32_t refClkFreq = 0U;
80 uint64_t fracClk = 0U;
81
82 uint8_t refSel = (uint8_t)CCM_BIT_FIELD_VAL(fracCfg0, CCM_ANALOG_AUDIO_PLL1_GEN_CTRL_PLL_REF_CLK_SEL_MASK,
83 CCM_ANALOG_AUDIO_PLL1_GEN_CTRL_PLL_REF_CLK_SEL_SHIFT);
84 uint32_t mainDiv = CCM_BIT_FIELD_VAL(fracCfg1, CCM_ANALOG_AUDIO_PLL1_FDIV_CTL0_PLL_MAIN_DIV_MASK,
85 CCM_ANALOG_AUDIO_PLL1_FDIV_CTL0_PLL_MAIN_DIV_SHIFT);
86 uint8_t preDiv = (uint8_t)CCM_BIT_FIELD_VAL(fracCfg1, CCM_ANALOG_AUDIO_PLL1_FDIV_CTL0_PLL_PRE_DIV_MASK,
87 CCM_ANALOG_AUDIO_PLL1_FDIV_CTL0_PLL_PRE_DIV_SHIFT);
88 uint8_t postDiv = (uint8_t)CCM_BIT_FIELD_VAL(fracCfg1, CCM_ANALOG_AUDIO_PLL1_FDIV_CTL0_PLL_POST_DIV_MASK,
89 CCM_ANALOG_AUDIO_PLL1_FDIV_CTL0_PLL_POST_DIV_SHIFT);
90 uint32_t dsm = CCM_BIT_FIELD_VAL(fracCfg2, CCM_ANALOG_AUDIO_PLL1_FDIV_CTL1_PLL_DSM_MASK,
91 CCM_ANALOG_AUDIO_PLL1_FDIV_CTL1_PLL_DSM_SHIFT);
92
93 if (refSel == 0U) /* OSC 24M Clock */
94 {
95 refClkFreq = CPU_XTAL_SOSC_CLK_24MHZ;
96 }
97 else
98 {
99 refClkFreq = CLK_PAD_CLK; /* CLK_PAD_CLK Clock, please note that the value is 0hz by default, it could be set at
100 system_MIMX8MLx_cm7.h :65 */
101 }
102 fracClk = (uint64_t)refClkFreq * ((uint64_t)mainDiv * 65536UL + (uint64_t)dsm) /
103 ((uint64_t)65536UL * preDiv * (1UL << postDiv));
104
105 return (uint32_t)fracClk;
106 }
107
GetIntegerPllFreq(const volatile uint32_t * base)108 uint32_t GetIntegerPllFreq(const volatile uint32_t *base)
109 {
110 uint32_t integerCfg0 = CCM_ANALOG_REG_VAL(base, 0U);
111 uint32_t integerCfg1 = CCM_ANALOG_REG_VAL(base, 4U);
112 uint32_t refClkFreq = 0U;
113 uint64_t pllOutClock = 0U;
114
115 uint8_t pllBypass = (uint8_t)CCM_BIT_FIELD_VAL(integerCfg0, CCM_ANALOG_SYS_PLL1_GEN_CTRL_PLL_BYPASS_MASK,
116 CCM_ANALOG_SYS_PLL1_GEN_CTRL_PLL_BYPASS_SHIFT);
117 uint8_t refSel = (uint8_t)CCM_BIT_FIELD_VAL(integerCfg0, CCM_ANALOG_SYS_PLL1_GEN_CTRL_PLL_REF_CLK_SEL_MASK,
118 CCM_ANALOG_SYS_PLL1_GEN_CTRL_PLL_REF_CLK_SEL_SHIFT);
119 uint32_t mainDiv = CCM_BIT_FIELD_VAL(integerCfg1, CCM_ANALOG_SYS_PLL1_FDIV_CTL0_PLL_MAIN_DIV_MASK,
120 CCM_ANALOG_SYS_PLL1_FDIV_CTL0_PLL_MAIN_DIV_SHIFT);
121 uint8_t preDiv = (uint8_t)CCM_BIT_FIELD_VAL(integerCfg1, CCM_ANALOG_SYS_PLL1_FDIV_CTL0_PLL_PRE_DIV_MASK,
122 CCM_ANALOG_SYS_PLL1_FDIV_CTL0_PLL_PRE_DIV_SHIFT);
123 uint8_t postDiv = (uint8_t)CCM_BIT_FIELD_VAL(integerCfg1, CCM_ANALOG_SYS_PLL1_FDIV_CTL0_PLL_POST_DIV_MASK,
124 CCM_ANALOG_SYS_PLL1_FDIV_CTL0_PLL_POST_DIV_SHIFT);
125
126 if (refSel == 0U) /* OSC 24M Clock */
127 {
128 refClkFreq = CPU_XTAL_SOSC_CLK_24MHZ;
129 }
130 else
131 {
132 refClkFreq = CLK_PAD_CLK; /* CLK_PAD_CLK Clock, please note that the value is 0hz by default, it could be set at
133 system_MIMX8MLx_cm7.h :65 */
134 }
135
136 if (pllBypass != 0U)
137 {
138 pllOutClock = refClkFreq;
139 }
140
141 else
142 {
143 pllOutClock = (uint64_t)refClkFreq * mainDiv / (((uint64_t)(1U) << postDiv) * preDiv);
144 }
145
146 return (uint32_t)pllOutClock;
147 }
148
149 /* ----------------------------------------------------------------------------
150 -- Core clock
151 ---------------------------------------------------------------------------- */
152
153 uint32_t SystemCoreClock = DEFAULT_SYSTEM_CLOCK;
154
155 /* ----------------------------------------------------------------------------
156 -- SystemInit()
157 ---------------------------------------------------------------------------- */
158
SystemInit(void)159 void SystemInit(void)
160 {
161 #if ((__FPU_PRESENT == 1) && (__FPU_USED == 1))
162 SCB->CPACR |= ((3UL << 10 * 2) | (3UL << 11 * 2)); /* set CP10, CP11 Full Access */
163 #endif /* ((__FPU_PRESENT == 1) && (__FPU_USED == 1)) */
164
165 SystemInitHook();
166 }
167
168 /* ----------------------------------------------------------------------------
169 -- SystemCoreClockUpdate()
170 ---------------------------------------------------------------------------- */
171
SystemCoreClockUpdate(void)172 void SystemCoreClockUpdate(void)
173 {
174 volatile uint32_t *M7_ClockRoot = (volatile uint32_t *)(&(CCM)->ROOT[1].TARGET_ROOT);
175 uint32_t pre = ((*M7_ClockRoot & CCM_TARGET_ROOT_PRE_PODF_MASK) >> CCM_TARGET_ROOT_PRE_PODF_SHIFT) + 1U;
176 uint32_t post = ((*M7_ClockRoot & CCM_TARGET_ROOT_POST_PODF_MASK) >> CCM_TARGET_ROOT_POST_PODF_SHIFT) + 1U;
177
178 uint32_t freq = 0U;
179
180 switch ((*M7_ClockRoot & CCM_TARGET_ROOT_MUX_MASK) >> CCM_TARGET_ROOT_MUX_SHIFT)
181 {
182 case 0U: /* OSC 24M Clock */
183 freq = CPU_XTAL_SOSC_CLK_24MHZ;
184 break;
185 case 1U: /* System PLL2 DIV5 */
186 freq = GetIntegerPllFreq(&(CCM_ANALOG->SYS_PLL2_GEN_CTRL)) / 5U; /* Get System PLL2 DIV5 freq */
187 break;
188 case 2U: /* System PLL2 DIV4 */
189 freq = GetIntegerPllFreq(&(CCM_ANALOG->SYS_PLL2_GEN_CTRL)) / 4U; /* Get System PLL2 DIV4 freq */
190 break;
191 case 3U: /* System PLL1 DIV3 */
192 freq = GetIntegerPllFreq(&(CCM_ANALOG->SYS_PLL1_GEN_CTRL)) / 3U; /* Get System PLL1 DIV3 freq */
193 break;
194 case 4U: /* System PLL1 */
195 freq = GetIntegerPllFreq(&(CCM_ANALOG->SYS_PLL1_GEN_CTRL)); /* Get System PLL1 freq */
196 break;
197 case 5U: /* AUDIO PLL1 */
198 freq = GetFracPllFreq(&(CCM_ANALOG->AUDIO_PLL1_GEN_CTRL)); /* Get AUDIO PLL1 freq */
199 break;
200 case 6U: /* VIDEO PLL1 */
201 freq = GetFracPllFreq(&(CCM_ANALOG->VIDEO_PLL1_GEN_CTRL)); /* Get VIDEO PLL1 freq */
202 break;
203 case 7U: /* System PLL3 */
204 freq = GetIntegerPllFreq(&(CCM_ANALOG->SYS_PLL3_GEN_CTRL)); /* Get System PLL3 freq */
205 break;
206 default:
207 freq = CPU_XTAL_SOSC_CLK_24MHZ;
208 break;
209 }
210
211 SystemCoreClock = freq / pre / post;
212 }
213
214 /* ----------------------------------------------------------------------------
215 -- SystemInitHook()
216 ---------------------------------------------------------------------------- */
217
SystemInitHook(void)218 __attribute__((weak)) void SystemInitHook(void)
219 {
220 /* Void implementation of the weak function. */
221 }
222
