summaryrefslogtreecommitdiffstats
path: root/arch/arm/include/asm/arch-stm32f4/stm32.h
blob: a9f88db560fe4f2b3aa9931b26096647580bf5b2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
/*
 * (C) Copyright 2011
 * Yuri Tikhonov, Emcraft Systems, yur@emcraft.com
 *
 * (C) Copyright 2015
 * Kamil Lulko, <rev13@wp.pl>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef _MACH_STM32_H_
#define _MACH_STM32_H_

/*
 * Peripheral memory map
 */
#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_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_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

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_ */
OpenPOWER on IntegriCloud