1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2010-2011 Calxeda, Inc.
4 */
5
6 #include <common.h>
7 #include <ahci.h>
8 #include <netdev.h>
9 #include <scsi.h>
10
11 #include <linux/sizes.h>
12 #include <asm/io.h>
13
14 #define HB_AHCI_BASE 0xffe08000
15
16 #define HB_SCU_A9_PWR_STATUS 0xfff10008
17 #define HB_SREG_A9_PWR_REQ 0xfff3cf00
18 #define HB_SREG_A9_BOOT_SRC_STAT 0xfff3cf04
19 #define HB_SREG_A9_PWRDOM_STAT 0xfff3cf20
20 #define HB_SREG_A15_PWR_CTRL 0xfff3c200
21
22 #define HB_PWR_SUSPEND 0
23 #define HB_PWR_SOFT_RESET 1
24 #define HB_PWR_HARD_RESET 2
25 #define HB_PWR_SHUTDOWN 3
26
27 #define PWRDOM_STAT_SATA 0x80000000
28 #define PWRDOM_STAT_PCI 0x40000000
29 #define PWRDOM_STAT_EMMC 0x20000000
30
31 #define HB_SCU_A9_PWR_NORMAL 0
32 #define HB_SCU_A9_PWR_DORMANT 2
33 #define HB_SCU_A9_PWR_OFF 3
34
35 DECLARE_GLOBAL_DATA_PTR;
36
37 void cphy_disable_overrides(void);
38
39 /*
40 * Miscellaneous platform dependent initialisations
41 */
board_init(void)42 int board_init(void)
43 {
44 icache_enable();
45
46 return 0;
47 }
48
49 /* We know all the init functions have been run now */
board_eth_init(bd_t * bis)50 int board_eth_init(bd_t *bis)
51 {
52 int rc = 0;
53
54 #ifdef CONFIG_CALXEDA_XGMAC
55 rc += calxedaxgmac_initialize(0, 0xfff50000);
56 rc += calxedaxgmac_initialize(1, 0xfff51000);
57 #endif
58 return rc;
59 }
60
61 #ifdef CONFIG_SCSI_AHCI_PLAT
scsi_init(void)62 void scsi_init(void)
63 {
64 u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
65
66 cphy_disable_overrides();
67 if (reg & PWRDOM_STAT_SATA) {
68 ahci_init((void __iomem *)HB_AHCI_BASE);
69 scsi_scan(true);
70 }
71 }
72 #endif
73
74 #ifdef CONFIG_MISC_INIT_R
misc_init_r(void)75 int misc_init_r(void)
76 {
77 char envbuffer[16];
78 u32 boot_choice;
79
80 boot_choice = readl(HB_SREG_A9_BOOT_SRC_STAT) & 0xff;
81 sprintf(envbuffer, "bootcmd%d", boot_choice);
82 if (env_get(envbuffer)) {
83 sprintf(envbuffer, "run bootcmd%d", boot_choice);
84 env_set("bootcmd", envbuffer);
85 } else
86 env_set("bootcmd", "");
87
88 return 0;
89 }
90 #endif
91
dram_init(void)92 int dram_init(void)
93 {
94 gd->ram_size = SZ_512M;
95 return 0;
96 }
97
98 #if defined(CONFIG_OF_BOARD_SETUP)
ft_board_setup(void * fdt,bd_t * bd)99 int ft_board_setup(void *fdt, bd_t *bd)
100 {
101 static const char disabled[] = "disabled";
102 u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
103
104 if (!(reg & PWRDOM_STAT_SATA))
105 do_fixup_by_compat(fdt, "calxeda,hb-ahci", "status",
106 disabled, sizeof(disabled), 1);
107
108 if (!(reg & PWRDOM_STAT_EMMC))
109 do_fixup_by_compat(fdt, "calxeda,hb-sdhci", "status",
110 disabled, sizeof(disabled), 1);
111
112 return 0;
113 }
114 #endif
115
is_highbank(void)116 static int is_highbank(void)
117 {
118 uint32_t midr;
119
120 asm volatile ("mrc p15, 0, %0, c0, c0, 0\n" : "=r"(midr));
121
122 return (midr & 0xfff0) == 0xc090;
123 }
124
reset_cpu(ulong addr)125 void reset_cpu(ulong addr)
126 {
127 writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ);
128 if (is_highbank())
129 writeb(HB_SCU_A9_PWR_OFF, HB_SCU_A9_PWR_STATUS);
130 else
131 writel(0x1, HB_SREG_A15_PWR_CTRL);
132
133 wfi();
134 }
135
136 /*
137 * turn off the override before transferring control to Linux, since Linux
138 * may not support spread spectrum.
139 */
arch_preboot_os(void)140 void arch_preboot_os(void)
141 {
142 cphy_disable_overrides();
143 }
144