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
|
/*
* Copyright 2008 Cavium Networks
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/atomic.h>
#include "cns3xxx.h"
#include "pm.h"
#include "core.h"
void cns3xxx_pwr_clk_en(unsigned int block)
{
u32 reg = __raw_readl(PM_CLK_GATE_REG);
reg |= (block & PM_CLK_GATE_REG_MASK);
__raw_writel(reg, PM_CLK_GATE_REG);
}
EXPORT_SYMBOL(cns3xxx_pwr_clk_en);
void cns3xxx_pwr_clk_dis(unsigned int block)
{
u32 reg = __raw_readl(PM_CLK_GATE_REG);
reg &= ~(block & PM_CLK_GATE_REG_MASK);
__raw_writel(reg, PM_CLK_GATE_REG);
}
EXPORT_SYMBOL(cns3xxx_pwr_clk_dis);
void cns3xxx_pwr_power_up(unsigned int block)
{
u32 reg = __raw_readl(PM_PLL_HM_PD_CTRL_REG);
reg &= ~(block & CNS3XXX_PWR_PLL_ALL);
__raw_writel(reg, PM_PLL_HM_PD_CTRL_REG);
/* Wait for 300us for the PLL output clock locked. */
udelay(300);
};
EXPORT_SYMBOL(cns3xxx_pwr_power_up);
void cns3xxx_pwr_power_down(unsigned int block)
{
u32 reg = __raw_readl(PM_PLL_HM_PD_CTRL_REG);
/* write '1' to power down */
reg |= (block & CNS3XXX_PWR_PLL_ALL);
__raw_writel(reg, PM_PLL_HM_PD_CTRL_REG);
};
EXPORT_SYMBOL(cns3xxx_pwr_power_down);
static void cns3xxx_pwr_soft_rst_force(unsigned int block)
{
u32 reg = __raw_readl(PM_SOFT_RST_REG);
/*
* bit 0, 28, 29 => program low to reset,
* the other else program low and then high
*/
if (block & 0x30000001) {
reg &= ~(block & PM_SOFT_RST_REG_MASK);
} else {
reg &= ~(block & PM_SOFT_RST_REG_MASK);
__raw_writel(reg, PM_SOFT_RST_REG);
reg |= (block & PM_SOFT_RST_REG_MASK);
}
__raw_writel(reg, PM_SOFT_RST_REG);
}
EXPORT_SYMBOL(cns3xxx_pwr_soft_rst_force);
void cns3xxx_pwr_soft_rst(unsigned int block)
{
static unsigned int soft_reset;
if (soft_reset & block) {
/* SPI/I2C/GPIO use the same block, reset once. */
return;
} else {
soft_reset |= block;
}
cns3xxx_pwr_soft_rst_force(block);
}
EXPORT_SYMBOL(cns3xxx_pwr_soft_rst);
void cns3xxx_restart(char mode, const char *cmd)
{
/*
* To reset, we hit the on-board reset register
* in the system FPGA.
*/
cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(GLOBAL));
}
/*
* cns3xxx_cpu_clock - return CPU/L2 clock
* aclk: cpu clock/2
* hclk: cpu clock/4
* pclk: cpu clock/8
*/
int cns3xxx_cpu_clock(void)
{
u32 reg = __raw_readl(PM_CLK_CTRL_REG);
int cpu;
int cpu_sel;
int div_sel;
cpu_sel = (reg >> PM_CLK_CTRL_REG_OFFSET_PLL_CPU_SEL) & 0xf;
div_sel = (reg >> PM_CLK_CTRL_REG_OFFSET_CPU_CLK_DIV) & 0x3;
cpu = (300 + ((cpu_sel / 3) * 100) + ((cpu_sel % 3) * 33)) >> div_sel;
return cpu;
}
EXPORT_SYMBOL(cns3xxx_cpu_clock);
atomic_t usb_pwr_ref = ATOMIC_INIT(0);
EXPORT_SYMBOL(usb_pwr_ref);
|
