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 <cpu_func.h>
9 #include <env.h>
10 #include <netdev.h>
11 #include <scsi.h>
12
13 #include <linux/sizes.h>
14 #include <asm/io.h>
15
16 #define HB_AHCI_BASE 0xffe08000
17
18 #define HB_SCU_A9_PWR_STATUS 0xfff10008
19 #define HB_SREG_A9_PWR_REQ 0xfff3cf00
20 #define HB_SREG_A9_BOOT_SRC_STAT 0xfff3cf04
21 #define HB_SREG_A9_PWRDOM_STAT 0xfff3cf20
22 #define HB_SREG_A15_PWR_CTRL 0xfff3c200
23
24 #define HB_PWR_SUSPEND 0
25 #define HB_PWR_SOFT_RESET 1
26 #define HB_PWR_HARD_RESET 2
27 #define HB_PWR_SHUTDOWN 3
28
29 #define PWRDOM_STAT_SATA 0x80000000
30 #define PWRDOM_STAT_PCI 0x40000000
31 #define PWRDOM_STAT_EMMC 0x20000000
32
33 #define HB_SCU_A9_PWR_NORMAL 0
34 #define HB_SCU_A9_PWR_DORMANT 2
35 #define HB_SCU_A9_PWR_OFF 3
36
37 DECLARE_GLOBAL_DATA_PTR;
38
39 void cphy_disable_overrides(void);
40
41 /*
42 * Miscellaneous platform dependent initialisations
43 */
board_init(void)44 int board_init(void)
45 {
46 icache_enable();
47
48 return 0;
49 }
50
51 /* We know all the init functions have been run now */
board_eth_init(bd_t * bis)52 int board_eth_init(bd_t *bis)
53 {
54 int rc = 0;
55
56 #ifdef CONFIG_CALXEDA_XGMAC
57 rc += calxedaxgmac_initialize(0, 0xfff50000);
58 rc += calxedaxgmac_initialize(1, 0xfff51000);
59 #endif
60 return rc;
61 }
62
63 #ifdef CONFIG_SCSI_AHCI_PLAT
scsi_init(void)64 void scsi_init(void)
65 {
66 u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
67
68 cphy_disable_overrides();
69 if (reg & PWRDOM_STAT_SATA) {
70 ahci_init((void __iomem *)HB_AHCI_BASE);
71 scsi_scan(true);
72 }
73 }
74 #endif
75
76 #ifdef CONFIG_MISC_INIT_R
misc_init_r(void)77 int misc_init_r(void)
78 {
79 char envbuffer[16];
80 u32 boot_choice;
81
82 boot_choice = readl(HB_SREG_A9_BOOT_SRC_STAT) & 0xff;
83 sprintf(envbuffer, "bootcmd%d", boot_choice);
84 if (env_get(envbuffer)) {
85 sprintf(envbuffer, "run bootcmd%d", boot_choice);
86 env_set("bootcmd", envbuffer);
87 } else
88 env_set("bootcmd", "");
89
90 return 0;
91 }
92 #endif
93
dram_init(void)94 int dram_init(void)
95 {
96 gd->ram_size = SZ_512M;
97 return 0;
98 }
99
100 #if defined(CONFIG_OF_BOARD_SETUP)
ft_board_setup(void * fdt,bd_t * bd)101 int ft_board_setup(void *fdt, bd_t *bd)
102 {
103 static const char disabled[] = "disabled";
104 u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
105
106 if (!(reg & PWRDOM_STAT_SATA))
107 do_fixup_by_compat(fdt, "calxeda,hb-ahci", "status",
108 disabled, sizeof(disabled), 1);
109
110 if (!(reg & PWRDOM_STAT_EMMC))
111 do_fixup_by_compat(fdt, "calxeda,hb-sdhci", "status",
112 disabled, sizeof(disabled), 1);
113
114 return 0;
115 }
116 #endif
117
is_highbank(void)118 static int is_highbank(void)
119 {
120 uint32_t midr;
121
122 asm volatile ("mrc p15, 0, %0, c0, c0, 0\n" : "=r"(midr));
123
124 return (midr & 0xfff0) == 0xc090;
125 }
126
reset_cpu(ulong addr)127 void reset_cpu(ulong addr)
128 {
129 writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ);
130 if (is_highbank())
131 writeb(HB_SCU_A9_PWR_OFF, HB_SCU_A9_PWR_STATUS);
132 else
133 writel(0x1, HB_SREG_A15_PWR_CTRL);
134
135 wfi();
136 }
137
138 /*
139 * turn off the override before transferring control to Linux, since Linux
140 * may not support spread spectrum.
141 */
arch_preboot_os(void)142 void arch_preboot_os(void)
143 {
144 cphy_disable_overrides();
145 }
146