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
|
/*
* Copyright (c) 2012 - 2013 The Linux Foundation. All rights reserved.
*/
#include <delay.h>
#include <soc/clock.h>
#include <types.h>
/**
* uart_pll_vote_clk_enable - enables PLL8
*/
void uart_pll_vote_clk_enable(unsigned int clk_dummy)
{
setbits_le32(BB_PLL_ENA_SC0_REG, BIT(8));
if (!clk_dummy)
while((read32(PLL_LOCK_DET_STATUS_REG) & BIT(8)) == 0);
}
/**
* uart_set_rate_mnd - configures divider M and D values
*
* Sets the M, D parameters of the divider to generate the GSBI UART
* apps clock.
*/
static void uart_set_rate_mnd(unsigned int gsbi_port, unsigned int m,
unsigned int n)
{
/* Assert MND reset. */
setbits_le32(GSBIn_UART_APPS_NS_REG(gsbi_port), BIT(7));
/* Program M and D values. */
write32(GSBIn_UART_APPS_MD_REG(gsbi_port), MD16(m, n));
/* Deassert MND reset. */
clrbits_le32(GSBIn_UART_APPS_NS_REG(gsbi_port), BIT(7));
}
/**
* uart_branch_clk_enable_reg - enables branch clock
*
* Enables branch clock for GSBI UART port.
*/
static void uart_branch_clk_enable_reg(unsigned int gsbi_port)
{
setbits_le32(GSBIn_UART_APPS_NS_REG(gsbi_port), BIT(9));
}
/**
* uart_local_clock_enable - configures N value and enables root clocks
*
* Sets the N parameter of the divider and enables root clock and
* branch clocks for GSBI UART port.
*/
static void uart_local_clock_enable(unsigned int gsbi_port, unsigned int n,
unsigned int m)
{
unsigned int reg_val, uart_ns_val;
void *const reg = (void *)GSBIn_UART_APPS_NS_REG(gsbi_port);
/*
* Program the NS register, if applicable. NS registers are not
* set in the set_rate path because power can be saved by deferring
* the selection of a clocked source until the clock is enabled.
*/
reg_val = read32(reg); // REG(0x29D4+(0x20*((n)-1)))
reg_val &= ~(Uart_clk_ns_mask);
uart_ns_val = NS(BIT_POS_31,BIT_POS_16,n,m, 5, 4, 3, 1, 2, 0,3);
reg_val |= (uart_ns_val & Uart_clk_ns_mask);
write32(reg, reg_val);
/* enable MNCNTR_EN */
reg_val = read32(reg);
reg_val |= BIT(8);
write32(reg, reg_val);
/* set source to PLL8 running @384MHz */
reg_val = read32(reg);
reg_val |= 0x3;
write32(reg, reg_val);
/* Enable root. */
reg_val |= Uart_en_mask;
write32(reg, reg_val);
uart_branch_clk_enable_reg(gsbi_port);
}
/**
* uart_set_gsbi_clk - enables HCLK for UART GSBI port
*/
static void uart_set_gsbi_clk(unsigned int gsbi_port)
{
setbits_le32(GSBIn_HCLK_CTL_REG(gsbi_port), BIT(4));
}
/**
* uart_clock_config - configures UART clocks
*
* Configures GSBI UART dividers, enable root and branch clocks.
*/
void uart_clock_config(unsigned int gsbi_port, unsigned int m,
unsigned int n, unsigned int d, unsigned int clk_dummy)
{
uart_set_rate_mnd(gsbi_port, m, d);
uart_pll_vote_clk_enable(clk_dummy);
uart_local_clock_enable(gsbi_port, n, m);
uart_set_gsbi_clk(gsbi_port);
}
/**
* nand_clock_config - configure NAND controller clocks
*
* Enable clocks to EBI2. Must be invoked before touching EBI2
* registers.
*/
void nand_clock_config(void)
{
write32(EBI2_CLK_CTL_REG,
CLK_BRANCH_ENA(1) | ALWAYS_ON_CLK_BRANCH_ENA(1));
/* Wait for clock to stabilize. */
udelay(10);
}
/**
* usb_clock_config - configure USB controller clocks and reset the controller
*/
void usb_clock_config(void)
{
/* Magic clock initialization numbers, nobody knows how they work... */
write32(USB30_MASTER_CLK_CTL_REG, 0x10);
write32(USB30_1_MASTER_CLK_CTL_REG, 0x10);
write32(USB30_MASTER_CLK_MD, 0x500DF);
write32(USB30_MASTER_CLK_NS, 0xE40942);
write32(USB30_MOC_UTMI_CLK_MD, 0x100D7);
write32(USB30_MOC_UTMI_CLK_NS, 0xD80942);
write32(USB30_MOC_UTMI_CLK_CTL, 0x10);
write32(USB30_1_MOC_UTMI_CLK_CTL, 0x10);
write32(USB30_RESET,
1 << 5 | 1 << 4 | 1 << 3 | 1 << 2 | 1 << 1 | 1 << 0 | 0);
udelay(5);
write32(USB30_RESET, 0); /* deassert all USB resets again */
}
|
