1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2010-2011 Calxeda, Inc.
13 #include <linux/sizes.h>
16 #define HB_AHCI_BASE 0xffe08000
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
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
29 #define PWRDOM_STAT_SATA 0x80000000
30 #define PWRDOM_STAT_PCI 0x40000000
31 #define PWRDOM_STAT_EMMC 0x20000000
33 #define HB_SCU_A9_PWR_NORMAL 0
34 #define HB_SCU_A9_PWR_DORMANT 2
35 #define HB_SCU_A9_PWR_OFF 3
37 DECLARE_GLOBAL_DATA_PTR;
39 void cphy_disable_overrides(void);
42 * Miscellaneous platform dependent initialisations
51 /* We know all the init functions have been run now */
52 int board_eth_init(bd_t *bis)
56 #ifdef CONFIG_CALXEDA_XGMAC
57 rc += calxedaxgmac_initialize(0, 0xfff50000);
58 rc += calxedaxgmac_initialize(1, 0xfff51000);
63 #ifdef CONFIG_SCSI_AHCI_PLAT
66 u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
68 cphy_disable_overrides();
69 if (reg & PWRDOM_STAT_SATA) {
70 ahci_init((void __iomem *)HB_AHCI_BASE);
76 #ifdef CONFIG_MISC_INIT_R
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);
88 env_set("bootcmd", "");
96 gd->ram_size = SZ_512M;
100 #if defined(CONFIG_OF_BOARD_SETUP)
101 int ft_board_setup(void *fdt, bd_t *bd)
103 static const char disabled[] = "disabled";
104 u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
106 if (!(reg & PWRDOM_STAT_SATA))
107 do_fixup_by_compat(fdt, "calxeda,hb-ahci", "status",
108 disabled, sizeof(disabled), 1);
110 if (!(reg & PWRDOM_STAT_EMMC))
111 do_fixup_by_compat(fdt, "calxeda,hb-sdhci", "status",
112 disabled, sizeof(disabled), 1);
118 static int is_highbank(void)
122 asm volatile ("mrc p15, 0, %0, c0, c0, 0\n" : "=r"(midr));
124 return (midr & 0xfff0) == 0xc090;
127 void reset_cpu(ulong addr)
129 writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ);
131 writeb(HB_SCU_A9_PWR_OFF, HB_SCU_A9_PWR_STATUS);
133 writel(0x1, HB_SREG_A15_PWR_CTRL);
139 * turn off the override before transferring control to Linux, since Linux
140 * may not support spread spectrum.
142 void arch_preboot_os(void)
144 cphy_disable_overrides();