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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
#include <common.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/clock.h>
#include <asm/arch/prcm.h>
#ifdef CONFIG_SPL_BUILD
void clock_init_safe(void)
{
struct sunxi_ccm_reg *const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
struct sunxi_prcm_reg *const prcm =
(struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
if (IS_ENABLED(CONFIG_MACH_SUN50I_H616)) {
/* this seems to enable PLLs on H616 */
setbits_le32(&prcm->sys_pwroff_gating, 0x10);
setbits_le32(&prcm->res_cal_ctrl, 2);
}
clrbits_le32(&prcm->res_cal_ctrl, 1);
setbits_le32(&prcm->res_cal_ctrl, 1);
if (IS_ENABLED(CONFIG_MACH_SUN50I_H6)) {
/* set key field for ldo enable */
setbits_le32(&prcm->pll_ldo_cfg, 0xA7000000);
/* set PLL VDD LDO output to 1.14 V */
setbits_le32(&prcm->pll_ldo_cfg, 0x60000);
}
clock_set_pll1(408000000);
writel(CCM_PLL6_DEFAULT, &ccm->pll6_cfg);
while (!(readl(&ccm->pll6_cfg) & CCM_PLL6_LOCK))
;
clrsetbits_le32(&ccm->cpu_axi_cfg, CCM_CPU_AXI_APB_MASK | CCM_CPU_AXI_AXI_MASK,
CCM_CPU_AXI_DEFAULT_FACTORS);
writel(CCM_PSI_AHB1_AHB2_DEFAULT, &ccm->psi_ahb1_ahb2_cfg);
writel(CCM_AHB3_DEFAULT, &ccm->ahb3_cfg);
writel(CCM_APB1_DEFAULT, &ccm->apb1_cfg);
/*
* The mux and factor are set, but the clock will be enabled in
* DRAM initialization code.
*/
writel(MBUS_CLK_SRC_PLL6X2 | MBUS_CLK_M(3), &ccm->mbus_cfg);
}
#endif
void clock_init_uart(void)
{
struct sunxi_ccm_reg *const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
/* uart clock source is apb2 */
writel(APB2_CLK_SRC_OSC24M|
APB2_CLK_RATE_N_1|
APB2_CLK_RATE_M(1),
&ccm->apb2_cfg);
/* open the clock for uart */
setbits_le32(&ccm->uart_gate_reset,
1 << (CONFIG_CONS_INDEX - 1));
/* deassert uart reset */
setbits_le32(&ccm->uart_gate_reset,
1 << (RESET_SHIFT + CONFIG_CONS_INDEX - 1));
}
#ifdef CONFIG_SPL_BUILD
void clock_set_pll1(unsigned int clk)
{
struct sunxi_ccm_reg * const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
u32 val;
/* Do not support clocks < 288MHz as they need factor P */
if (clk < 288000000) clk = 288000000;
/* Switch to 24MHz clock while changing PLL1 */
val = readl(&ccm->cpu_axi_cfg);
val &= ~CCM_CPU_AXI_MUX_MASK;
val |= CCM_CPU_AXI_MUX_OSC24M;
writel(val, &ccm->cpu_axi_cfg);
/* clk = 24*n/p, p is ignored if clock is >288MHz */
writel(CCM_PLL1_CTRL_EN | CCM_PLL1_LOCK_EN | CCM_PLL1_CLOCK_TIME_2 |
#ifdef CONFIG_MACH_SUN50I_H616
CCM_PLL1_OUT_EN |
#endif
CCM_PLL1_CTRL_N(clk / 24000000), &ccm->pll1_cfg);
while (!(readl(&ccm->pll1_cfg) & CCM_PLL1_LOCK)) {}
/* Switch CPU to PLL1 */
val = readl(&ccm->cpu_axi_cfg);
val &= ~CCM_CPU_AXI_MUX_MASK;
val |= CCM_CPU_AXI_MUX_PLL_CPUX;
writel(val, &ccm->cpu_axi_cfg);
}
#endif
unsigned int clock_get_pll6(void)
{
struct sunxi_ccm_reg *const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
int m = IS_ENABLED(CONFIG_MACH_SUN50I_H6) ? 4 : 2;
uint32_t rval = readl(&ccm->pll6_cfg);
int n = ((rval & CCM_PLL6_CTRL_N_MASK) >> CCM_PLL6_CTRL_N_SHIFT) + 1;
int div1 = ((rval & CCM_PLL6_CTRL_DIV1_MASK) >>
CCM_PLL6_CTRL_DIV1_SHIFT) + 1;
int div2 = ((rval & CCM_PLL6_CTRL_DIV2_MASK) >>
CCM_PLL6_CTRL_DIV2_SHIFT) + 1;
/* The register defines PLL6-2X or PLL6-4X, not plain PLL6 */
return 24000000 / m * n / div1 / div2;
}
int clock_twi_onoff(int port, int state)
{
struct sunxi_ccm_reg *const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
struct sunxi_prcm_reg *const prcm =
(struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
u32 value, *ptr;
int shift;
value = BIT(GATE_SHIFT) | BIT (RESET_SHIFT);
if (port == 5) {
shift = 0;
ptr = &prcm->twi_gate_reset;
} else {
shift = port;
ptr = &ccm->twi_gate_reset;
}
/* set the apb clock gate and reset for twi */
if (state)
setbits_le32(ptr, value << shift);
else
clrbits_le32(ptr, value << shift);
return 0;
}
|