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7#include <common.h>
8#include <dm.h>
9#include <wdt.h>
10#include <asm/io.h>
11#include <asm/arch/hardware.h>
12#include <asm/arch/at91_pmc.h>
13#include <asm/arch/at91_wdt.h>
14
15#define EN_UPLL_TIMEOUT 500
16
17void at91_periph_clk_enable(int id)
18{
19 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
20
21#ifdef CPU_HAS_PCR
22 u32 regval;
23 u32 div_value;
24
25 if (id > AT91_PMC_PCR_PID_MASK)
26 return;
27
28 writel(id, &pmc->pcr);
29
30 div_value = readl(&pmc->pcr) & AT91_PMC_PCR_DIV;
31
32 regval = AT91_PMC_PCR_EN | AT91_PMC_PCR_CMD_WRITE | id | div_value;
33
34 writel(regval, &pmc->pcr);
35#else
36 writel(0x01 << id, &pmc->pcer);
37#endif
38}
39
40void at91_periph_clk_disable(int id)
41{
42 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
43
44#ifdef CPU_HAS_PCR
45 u32 regval;
46
47 if (id > AT91_PMC_PCR_PID_MASK)
48 return;
49
50 regval = AT91_PMC_PCR_CMD_WRITE | id;
51
52 writel(regval, &pmc->pcr);
53#else
54 writel(0x01 << id, &pmc->pcdr);
55#endif
56}
57
58void at91_system_clk_enable(int sys_clk)
59{
60 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
61
62 writel(sys_clk, &pmc->scer);
63}
64
65void at91_system_clk_disable(int sys_clk)
66{
67 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
68
69 writel(sys_clk, &pmc->scdr);
70}
71
72int at91_upll_clk_enable(void)
73{
74 struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
75 ulong start_time, tmp_time;
76
77 if ((readl(&pmc->uckr) & AT91_PMC_UPLLEN) == AT91_PMC_UPLLEN)
78 return 0;
79
80 start_time = get_timer(0);
81 writel(AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr);
82 while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU) {
83 tmp_time = get_timer(0);
84 if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
85 printf("ERROR: failed to enable UPLL\n");
86 return -1;
87 }
88 }
89
90 return 0;
91}
92
93int at91_upll_clk_disable(void)
94{
95 struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
96 ulong start_time, tmp_time;
97
98 start_time = get_timer(0);
99 writel(readl(&pmc->uckr) & ~AT91_PMC_UPLLEN, &pmc->uckr);
100 while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU) {
101 tmp_time = get_timer(0);
102 if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
103 printf("ERROR: failed to stop UPLL\n");
104 return -1;
105 }
106 }
107
108 return 0;
109}
110
111void at91_usb_clk_init(u32 value)
112{
113 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
114
115 writel(value, &pmc->usb);
116}
117
118void at91_pllicpr_init(u32 icpr)
119{
120 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
121
122 writel(icpr, &pmc->pllicpr);
123}
124
