1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * (C) Copyright 2007
4  * Stelian Pop <stelian@popies.net>
5  * Lead Tech Design <www.leadtechdesign.com>
6  * Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
7  */
8 #ifndef __ASM_ARM_ARCH_CLK_H__
9 #define __ASM_ARM_ARCH_CLK_H__
10 
11 #include <asm/arch/hardware.h>
12 #include <asm/arch/at91_pmc.h>
13 #include <asm/global_data.h>
14 
15 #define GCK_CSS_SLOW_CLK	0
16 #define GCK_CSS_MAIN_CLK	1
17 #define GCK_CSS_PLLA_CLK	2
18 #define GCK_CSS_UPLL_CLK	3
19 #define GCK_CSS_MCK_CLK		4
20 #define GCK_CSS_AUDIO_CLK	5
21 
22 #define AT91_UTMI_PLL_CLK_FREQ	480000000
23 
24 static inline unsigned long get_cpu_clk_rate(void)
25 {
26 	DECLARE_GLOBAL_DATA_PTR;
27 	return gd->arch.cpu_clk_rate_hz;
28 }
29 
30 static inline unsigned long get_main_clk_rate(void)
31 {
32 	DECLARE_GLOBAL_DATA_PTR;
33 	return gd->arch.main_clk_rate_hz;
34 }
35 
36 static inline unsigned long get_mck_clk_rate(void)
37 {
38 	DECLARE_GLOBAL_DATA_PTR;
39 	return gd->arch.mck_rate_hz;
40 }
41 
42 static inline unsigned long get_plla_clk_rate(void)
43 {
44 	DECLARE_GLOBAL_DATA_PTR;
45 	return gd->arch.plla_rate_hz;
46 }
47 
48 static inline unsigned long get_pllb_clk_rate(void)
49 {
50 	DECLARE_GLOBAL_DATA_PTR;
51 	return gd->arch.pllb_rate_hz;
52 }
53 
54 static inline u32 get_pllb_init(void)
55 {
56 	DECLARE_GLOBAL_DATA_PTR;
57 	return gd->arch.at91_pllb_usb_init;
58 }
59 
60 #ifdef CPU_HAS_H32MXDIV
61 static inline unsigned int get_h32mxdiv(void)
62 {
63 	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
64 
65 	return readl(&pmc->mckr) & AT91_PMC_MCKR_H32MXDIV;
66 }
67 #else
68 static inline unsigned int get_h32mxdiv(void)
69 {
70 	return 0;
71 }
72 #endif
73 
74 static inline unsigned long get_macb_pclk_rate(unsigned int dev_id)
75 {
76 	if (get_h32mxdiv())
77 		return get_mck_clk_rate() / 2;
78 	else
79 		return get_mck_clk_rate();
80 }
81 
82 static inline unsigned long get_usart_clk_rate(unsigned int dev_id)
83 {
84 	if (get_h32mxdiv())
85 		return get_mck_clk_rate() / 2;
86 	else
87 		return get_mck_clk_rate();
88 }
89 
90 static inline unsigned long get_lcdc_clk_rate(unsigned int dev_id)
91 {
92 	return get_mck_clk_rate();
93 }
94 
95 static inline unsigned long get_spi_clk_rate(unsigned int dev_id)
96 {
97 	if (get_h32mxdiv())
98 		return get_mck_clk_rate() / 2;
99 	else
100 		return get_mck_clk_rate();
101 }
102 
103 static inline unsigned long get_twi_clk_rate(unsigned int dev_id)
104 {
105 	if (get_h32mxdiv())
106 		return get_mck_clk_rate() / 2;
107 	else
108 		return get_mck_clk_rate();
109 }
110 
111 static inline unsigned long get_mci_clk_rate(void)
112 {
113 	if (get_h32mxdiv())
114 		return get_mck_clk_rate() / 2;
115 	else
116 		return get_mck_clk_rate();
117 }
118 
119 static inline unsigned long get_pit_clk_rate(void)
120 {
121 	if (get_h32mxdiv())
122 		return get_mck_clk_rate() / 2;
123 	else
124 		return get_mck_clk_rate();
125 }
126 
127 int at91_clock_init(unsigned long main_clock);
128 void at91_periph_clk_enable(int id);
129 void at91_periph_clk_disable(int id);
130 int at91_enable_periph_generated_clk(u32 id, u32 clk_source, u32 div);
131 u32 at91_get_periph_generated_clk(u32 id);
132 void at91_system_clk_enable(int sys_clk);
133 void at91_system_clk_disable(int sys_clk);
134 int at91_upll_clk_enable(void);
135 int at91_upll_clk_disable(void);
136 void at91_usb_clk_init(u32 value);
137 int at91_pllb_clk_enable(u32 pllbr);
138 int at91_pllb_clk_disable(void);
139 void at91_pllicpr_init(u32 icpr);
140 
141 #endif /* __ASM_ARM_ARCH_CLK_H__ */
142