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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 3aec452e4dbd16be7bdbabfa80d1fcc840cf342c / . / arch / arm / mach-uniphier / clk / pll-ld4.c
blob: 13257e4d168978279fa0e37f11b3e6778151222b [file] [log] [blame]
Masahiro Yamada6a3e4272016-09-17 03:33:09 +0900[diff] [blame]1/*
2 * Copyright (C) 2013-2014 Panasonic Corporation
3 * Copyright (C) 2015-2016 Socionext Inc.
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#include <common.h>
9#include <linux/io.h>
10
11#include "../init.h"
12#include "../sc-regs.h"
13#include "../sg-regs.h"
14#include "pll.h"
15
16static void upll_init(void)
17{
18 u32 tmp, clk_mode_upll, clk_mode_axosel;
19
20 tmp = readl(SG_PINMON0);
21 clk_mode_upll = tmp & SG_PINMON0_CLK_MODE_UPLLSRC_MASK;
22 clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
23
24 /* set 0 to SNRT(UPLLCTRL.bit28) and K_LD(UPLLCTRL.bit[27]) */
25 tmp = readl(SC_UPLLCTRL);
26 tmp &= ~0x18000000;
27 writel(tmp, SC_UPLLCTRL);
28
29 if (clk_mode_upll == SG_PINMON0_CLK_MODE_UPLLSRC_DEFAULT) {
30 if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_U ||
31 clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_A) {
32 /* AXO: 25MHz */
33 tmp &= ~0x07ffffff;
34 tmp |= 0x0228f5c0;
35 } else {
36 /* AXO: default 24.576MHz */
37 tmp &= ~0x07ffffff;
38 tmp |= 0x02328000;
39 }
40 }
41
42 writel(tmp, SC_UPLLCTRL);
43
44 /* set 1 to K_LD(UPLLCTRL.bit[27]) */
45 tmp |= 0x08000000;
46 writel(tmp, SC_UPLLCTRL);
47
48 /* wait 10 usec */
49 udelay(10);
50
51 /* set 1 to SNRT(UPLLCTRL.bit[28]) */
52 tmp |= 0x10000000;
53 writel(tmp, SC_UPLLCTRL);
54}
55
56static void vpll_init(void)
57{
58 u32 tmp, clk_mode_axosel;
59
60 tmp = readl(SG_PINMON0);
61 clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
62
63 /* set 1 to VPLA27WP and VPLA27WP */
64 tmp = readl(SC_VPLL27ACTRL);
65 tmp |= 0x00000001;
66 writel(tmp, SC_VPLL27ACTRL);
67 tmp = readl(SC_VPLL27BCTRL);
68 tmp |= 0x00000001;
69 writel(tmp, SC_VPLL27BCTRL);
70
71 /* Set 0 to VPLA_K_LD and VPLB_K_LD */
72 tmp = readl(SC_VPLL27ACTRL3);
73 tmp &= ~0x10000000;
74 writel(tmp, SC_VPLL27ACTRL3);
75 tmp = readl(SC_VPLL27BCTRL3);
76 tmp &= ~0x10000000;
77 writel(tmp, SC_VPLL27BCTRL3);
78
79 /* Set 0 to VPLA_SNRST and VPLB_SNRST */
80 tmp = readl(SC_VPLL27ACTRL2);
81 tmp &= ~0x10000000;
82 writel(tmp, SC_VPLL27ACTRL2);
83 tmp = readl(SC_VPLL27BCTRL2);
84 tmp &= ~0x10000000;
85 writel(tmp, SC_VPLL27BCTRL2);
86
87 /* Set 0x20 to VPLA_SNRST and VPLB_SNRST */
88 tmp = readl(SC_VPLL27ACTRL2);
89 tmp &= ~0x0000007f;
90 tmp |= 0x00000020;
91 writel(tmp, SC_VPLL27ACTRL2);
92 tmp = readl(SC_VPLL27BCTRL2);
93 tmp &= ~0x0000007f;
94 tmp |= 0x00000020;
95 writel(tmp, SC_VPLL27BCTRL2);
96
97 if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_U ||
98 clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_A) {
99 /* AXO: 25MHz */
100 tmp = readl(SC_VPLL27ACTRL3);
101 tmp &= ~0x000fffff;
102 tmp |= 0x00066664;
103 writel(tmp, SC_VPLL27ACTRL3);
104 tmp = readl(SC_VPLL27BCTRL3);
105 tmp &= ~0x000fffff;
106 tmp |= 0x00066664;
107 writel(tmp, SC_VPLL27BCTRL3);
108 } else {
109 /* AXO: default 24.576MHz */
110 tmp = readl(SC_VPLL27ACTRL3);
111 tmp &= ~0x000fffff;
112 tmp |= 0x000f5800;
113 writel(tmp, SC_VPLL27ACTRL3);
114 tmp = readl(SC_VPLL27BCTRL3);
115 tmp &= ~0x000fffff;
116 tmp |= 0x000f5800;
117 writel(tmp, SC_VPLL27BCTRL3);
118 }
119
120 /* Set 1 to VPLA_K_LD and VPLB_K_LD */
121 tmp = readl(SC_VPLL27ACTRL3);
122 tmp |= 0x10000000;
123 writel(tmp, SC_VPLL27ACTRL3);
124 tmp = readl(SC_VPLL27BCTRL3);
125 tmp |= 0x10000000;
126 writel(tmp, SC_VPLL27BCTRL3);
127
128 /* wait 10 usec */
129 udelay(10);
130
131 /* Set 0 to VPLA_SNRST and VPLB_SNRST */
132 tmp = readl(SC_VPLL27ACTRL2);
133 tmp |= 0x10000000;
134 writel(tmp, SC_VPLL27ACTRL2);
135 tmp = readl(SC_VPLL27BCTRL2);
136 tmp |= 0x10000000;
137 writel(tmp, SC_VPLL27BCTRL2);
138
139 /* set 0 to VPLA27WP and VPLA27WP */
140 tmp = readl(SC_VPLL27ACTRL);
141 tmp &= ~0x00000001;
142 writel(tmp, SC_VPLL27ACTRL);
143 tmp = readl(SC_VPLL27BCTRL);
144 tmp |= ~0x00000001;
145 writel(tmp, SC_VPLL27BCTRL);
146}
147
148void uniphier_ld4_pll_init(void)
149{
150 upll_init();
151 vpll_init();
152 uniphier_ld4_dpll_ssc_en();
153}