1 /* 2 * Copyright (C) 2018-2019, STMicroelectronics - All Rights Reserved 3 * Copyright (c) 2018-2019, Linaro Limited 4 * 5 * SPDX-License-Identifier: BSD-3-Clause 6 */ 7 8 #ifndef STM32MP_COMMON_H 9 #define STM32MP_COMMON_H 10 11 #include <stdbool.h> 12 13 #include <arch_helpers.h> 14 15 /* Functions to save and get boot context address given by ROM code */ 16 void stm32mp_save_boot_ctx_address(uintptr_t address); 17 uintptr_t stm32mp_get_boot_ctx_address(void); 18 19 /* Return the base address of the DDR controller */ 20 uintptr_t stm32mp_ddrctrl_base(void); 21 22 /* Return the base address of the DDR PHY */ 23 uintptr_t stm32mp_ddrphyc_base(void); 24 25 /* Return the base address of the PWR peripheral */ 26 uintptr_t stm32mp_pwr_base(void); 27 28 /* Return the base address of the RCC peripheral */ 29 uintptr_t stm32mp_rcc_base(void); 30 31 /* 32 * Platform util functions for the GPIO driver 33 * @bank: Target GPIO bank ID as per DT bindings 34 * 35 * Platform shall implement these functions to provide to stm32_gpio 36 * driver the resource reference for a target GPIO bank. That are 37 * memory mapped interface base address, interface offset (see below) 38 * and clock identifier. 39 * 40 * stm32_get_gpio_bank_offset() returns a bank offset that is used to 41 * check DT configuration matches platform implementation of the banks 42 * description. 43 */ 44 uintptr_t stm32_get_gpio_bank_base(unsigned int bank); 45 unsigned long stm32_get_gpio_bank_clock(unsigned int bank); 46 uint32_t stm32_get_gpio_bank_offset(unsigned int bank); 47 48 /* 49 * Util for clock gating and to get clock rate for stm32 and platform drivers 50 * @id: Target clock ID, ID used in clock DT bindings 51 */ 52 bool stm32mp_clk_is_enabled(unsigned long id); 53 void stm32mp_clk_enable(unsigned long id); 54 void stm32mp_clk_disable(unsigned long id); 55 unsigned long stm32mp_clk_get_rate(unsigned long id); 56 57 /* Initialise the IO layer and register platform IO devices */ 58 void stm32mp_io_setup(void); 59 60 static inline uint64_t arm_cnt_us2cnt(uint32_t us) 61 { 62 return ((uint64_t)us * (uint64_t)read_cntfrq()) / 1000000ULL; 63 } 64 65 static inline uint64_t timeout_init_us(uint32_t us) 66 { 67 return read_cntpct_el0() + arm_cnt_us2cnt(us); 68 } 69 70 static inline bool timeout_elapsed(uint64_t expire) 71 { 72 return read_cntpct_el0() > expire; 73 } 74 75 #endif /* STM32MP_COMMON_H */ 76