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/*
* (C) Copyright 2011
* Yuri Tikhonov, Emcraft Systems, yur@emcraft.com
*
* (C) Copyright 2015
* Kamil Lulko, <kamil.lulko@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _MACH_STM32_H_
#define _MACH_STM32_H_
/*
* Peripheral memory map
*/
#define STM32_SYSMEM_BASE 0x1FFF0000
#define STM32_PERIPH_BASE 0x40000000
#define STM32_APB1PERIPH_BASE (STM32_PERIPH_BASE + 0x00000000)
#define STM32_APB2PERIPH_BASE (STM32_PERIPH_BASE + 0x00010000)
#define STM32_AHB1PERIPH_BASE (STM32_PERIPH_BASE + 0x00020000)
#define STM32_AHB2PERIPH_BASE (STM32_PERIPH_BASE + 0x10000000)
#define STM32_BUS_MASK 0xFFFF0000
/*
* Register maps
*/
struct stm32_u_id_regs {
u32 u_id_low;
u32 u_id_mid;
u32 u_id_high;
};
struct stm32_rcc_regs {
u32 cr; /* RCC clock control */
u32 pllcfgr; /* RCC PLL configuration */
u32 cfgr; /* RCC clock configuration */
u32 cir; /* RCC clock interrupt */
u32 ahb1rstr; /* RCC AHB1 peripheral reset */
u32 ahb2rstr; /* RCC AHB2 peripheral reset */
u32 ahb3rstr; /* RCC AHB3 peripheral reset */
u32 rsv0;
u32 apb1rstr; /* RCC APB1 peripheral reset */
u32 apb2rstr; /* RCC APB2 peripheral reset */
u32 rsv1[2];
u32 ahb1enr; /* RCC AHB1 peripheral clock enable */
u32 ahb2enr; /* RCC AHB2 peripheral clock enable */
u32 ahb3enr; /* RCC AHB3 peripheral clock enable */
u32 rsv2;
u32 apb1enr; /* RCC APB1 peripheral clock enable */
u32 apb2enr; /* RCC APB2 peripheral clock enable */
u32 rsv3[2];
u32 ahb1lpenr; /* RCC AHB1 periph clk enable in low pwr mode */
u32 ahb2lpenr; /* RCC AHB2 periph clk enable in low pwr mode */
u32 ahb3lpenr; /* RCC AHB3 periph clk enable in low pwr mode */
u32 rsv4;
u32 apb1lpenr; /* RCC APB1 periph clk enable in low pwr mode */
u32 apb2lpenr; /* RCC APB2 periph clk enable in low pwr mode */
u32 rsv5[2];
u32 bdcr; /* RCC Backup domain control */
u32 csr; /* RCC clock control & status */
u32 rsv6[2];
u32 sscgr; /* RCC spread spectrum clock generation */
u32 plli2scfgr; /* RCC PLLI2S configuration */
u32 pllsaicfgr;
u32 dckcfgr;
};
struct stm32_pwr_regs {
u32 cr;
u32 csr;
};
struct stm32_flash_regs {
u32 acr;
u32 key;
u32 optkeyr;
u32 sr;
u32 cr;
u32 optcr;
u32 optcr1;
};
/*
* Registers access macros
*/
#define STM32_U_ID_BASE (STM32_SYSMEM_BASE + 0x7A10)
#define STM32_U_ID ((struct stm32_u_id_regs *)STM32_U_ID_BASE)
#define STM32_RCC_BASE (STM32_AHB1PERIPH_BASE + 0x3800)
#define STM32_RCC ((struct stm32_rcc_regs *)STM32_RCC_BASE)
#define STM32_PWR_BASE (STM32_APB1PERIPH_BASE + 0x7000)
#define STM32_PWR ((struct stm32_pwr_regs *)STM32_PWR_BASE)
#define STM32_FLASH_BASE (STM32_AHB1PERIPH_BASE + 0x3C00)
#define STM32_FLASH ((struct stm32_flash_regs *)STM32_FLASH_BASE)
#define STM32_FLASH_SR_BSY (1 << 16)
#define STM32_FLASH_CR_PG (1 << 0)
#define STM32_FLASH_CR_SER (1 << 1)
#define STM32_FLASH_CR_STRT (1 << 16)
#define STM32_FLASH_CR_LOCK (1 << 31)
#define STM32_FLASH_CR_SNB_OFFSET 3
#define STM32_FLASH_CR_SNB_MASK (15 << STM32_FLASH_CR_SNB_OFFSET)
/*
* Peripheral base addresses
*/
#define STM32_USART1_BASE (STM32_APB2PERIPH_BASE + 0x1000)
#define STM32_USART2_BASE (STM32_APB1PERIPH_BASE + 0x4400)
#define STM32_USART3_BASE (STM32_APB1PERIPH_BASE + 0x4800)
#define STM32_USART6_BASE (STM32_APB2PERIPH_BASE + 0x1400)
enum clock {
CLOCK_CORE,
CLOCK_AHB,
CLOCK_APB1,
CLOCK_APB2
};
int configure_clocks(void);
unsigned long clock_get(enum clock clck);
#endif /* _MACH_STM32_H_ */
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