highbank.c
2.77 KB
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
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2010-2011 Calxeda, Inc.
*/
#include <common.h>
#include <ahci.h>
#include <cpu_func.h>
#include <env.h>
#include <netdev.h>
#include <scsi.h>
#include <linux/sizes.h>
#include <asm/io.h>
#define HB_AHCI_BASE 0xffe08000
#define HB_SCU_A9_PWR_STATUS 0xfff10008
#define HB_SREG_A9_PWR_REQ 0xfff3cf00
#define HB_SREG_A9_BOOT_SRC_STAT 0xfff3cf04
#define HB_SREG_A9_PWRDOM_STAT 0xfff3cf20
#define HB_SREG_A15_PWR_CTRL 0xfff3c200
#define HB_PWR_SUSPEND 0
#define HB_PWR_SOFT_RESET 1
#define HB_PWR_HARD_RESET 2
#define HB_PWR_SHUTDOWN 3
#define PWRDOM_STAT_SATA 0x80000000
#define PWRDOM_STAT_PCI 0x40000000
#define PWRDOM_STAT_EMMC 0x20000000
#define HB_SCU_A9_PWR_NORMAL 0
#define HB_SCU_A9_PWR_DORMANT 2
#define HB_SCU_A9_PWR_OFF 3
DECLARE_GLOBAL_DATA_PTR;
void cphy_disable_overrides(void);
/*
* Miscellaneous platform dependent initialisations
*/
int board_init(void)
{
icache_enable();
return 0;
}
/* We know all the init functions have been run now */
int board_eth_init(bd_t *bis)
{
int rc = 0;
#ifdef CONFIG_CALXEDA_XGMAC
rc += calxedaxgmac_initialize(0, 0xfff50000);
rc += calxedaxgmac_initialize(1, 0xfff51000);
#endif
return rc;
}
#ifdef CONFIG_SCSI_AHCI_PLAT
void scsi_init(void)
{
u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
cphy_disable_overrides();
if (reg & PWRDOM_STAT_SATA) {
ahci_init((void __iomem *)HB_AHCI_BASE);
scsi_scan(true);
}
}
#endif
#ifdef CONFIG_MISC_INIT_R
int misc_init_r(void)
{
char envbuffer[16];
u32 boot_choice;
boot_choice = readl(HB_SREG_A9_BOOT_SRC_STAT) & 0xff;
sprintf(envbuffer, "bootcmd%d", boot_choice);
if (env_get(envbuffer)) {
sprintf(envbuffer, "run bootcmd%d", boot_choice);
env_set("bootcmd", envbuffer);
} else
env_set("bootcmd", "");
return 0;
}
#endif
int dram_init(void)
{
gd->ram_size = SZ_512M;
return 0;
}
#if defined(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *fdt, bd_t *bd)
{
static const char disabled[] = "disabled";
u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
if (!(reg & PWRDOM_STAT_SATA))
do_fixup_by_compat(fdt, "calxeda,hb-ahci", "status",
disabled, sizeof(disabled), 1);
if (!(reg & PWRDOM_STAT_EMMC))
do_fixup_by_compat(fdt, "calxeda,hb-sdhci", "status",
disabled, sizeof(disabled), 1);
return 0;
}
#endif
static int is_highbank(void)
{
uint32_t midr;
asm volatile ("mrc p15, 0, %0, c0, c0, 0\n" : "=r"(midr));
return (midr & 0xfff0) == 0xc090;
}
void reset_cpu(ulong addr)
{
writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ);
if (is_highbank())
writeb(HB_SCU_A9_PWR_OFF, HB_SCU_A9_PWR_STATUS);
else
writel(0x1, HB_SREG_A15_PWR_CTRL);
wfi();
}
/*
* turn off the override before transferring control to Linux, since Linux
* may not support spread spectrum.
*/
void arch_preboot_os(void)
{
cphy_disable_overrides();
}