1 /* 2 * Copyright 2010-2011 Calxeda, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <ahci.h> 9 #include <netdev.h> 10 #include <scsi.h> 11 12 #include <linux/sizes.h> 13 #include <asm/io.h> 14 15 #define HB_AHCI_BASE 0xffe08000 16 17 #define HB_SCU_A9_PWR_STATUS 0xfff10008 18 #define HB_SREG_A9_PWR_REQ 0xfff3cf00 19 #define HB_SREG_A9_BOOT_SRC_STAT 0xfff3cf04 20 #define HB_SREG_A9_PWRDOM_STAT 0xfff3cf20 21 #define HB_SREG_A15_PWR_CTRL 0xfff3c200 22 23 #define HB_PWR_SUSPEND 0 24 #define HB_PWR_SOFT_RESET 1 25 #define HB_PWR_HARD_RESET 2 26 #define HB_PWR_SHUTDOWN 3 27 28 #define PWRDOM_STAT_SATA 0x80000000 29 #define PWRDOM_STAT_PCI 0x40000000 30 #define PWRDOM_STAT_EMMC 0x20000000 31 32 #define HB_SCU_A9_PWR_NORMAL 0 33 #define HB_SCU_A9_PWR_DORMANT 2 34 #define HB_SCU_A9_PWR_OFF 3 35 36 DECLARE_GLOBAL_DATA_PTR; 37 38 void cphy_disable_overrides(void); 39 40 /* 41 * Miscellaneous platform dependent initialisations 42 */ 43 int board_init(void) 44 { 45 icache_enable(); 46 47 return 0; 48 } 49 50 /* We know all the init functions have been run now */ 51 int board_eth_init(bd_t *bis) 52 { 53 int rc = 0; 54 55 #ifdef CONFIG_CALXEDA_XGMAC 56 rc += calxedaxgmac_initialize(0, 0xfff50000); 57 rc += calxedaxgmac_initialize(1, 0xfff51000); 58 #endif 59 return rc; 60 } 61 62 #ifdef CONFIG_SCSI_AHCI_PLAT 63 void scsi_init(void) 64 { 65 u32 reg = readl(HB_SREG_A9_PWRDOM_STAT); 66 67 cphy_disable_overrides(); 68 if (reg & PWRDOM_STAT_SATA) { 69 ahci_init((void __iomem *)HB_AHCI_BASE); 70 scsi_scan(true); 71 } 72 } 73 #endif 74 75 #ifdef CONFIG_MISC_INIT_R 76 int misc_init_r(void) 77 { 78 char envbuffer[16]; 79 u32 boot_choice; 80 81 boot_choice = readl(HB_SREG_A9_BOOT_SRC_STAT) & 0xff; 82 sprintf(envbuffer, "bootcmd%d", boot_choice); 83 if (env_get(envbuffer)) { 84 sprintf(envbuffer, "run bootcmd%d", boot_choice); 85 env_set("bootcmd", envbuffer); 86 } else 87 env_set("bootcmd", ""); 88 89 return 0; 90 } 91 #endif 92 93 int dram_init(void) 94 { 95 gd->ram_size = SZ_512M; 96 return 0; 97 } 98 99 #if defined(CONFIG_OF_BOARD_SETUP) 100 int ft_board_setup(void *fdt, bd_t *bd) 101 { 102 static const char disabled[] = "disabled"; 103 u32 reg = readl(HB_SREG_A9_PWRDOM_STAT); 104 105 if (!(reg & PWRDOM_STAT_SATA)) 106 do_fixup_by_compat(fdt, "calxeda,hb-ahci", "status", 107 disabled, sizeof(disabled), 1); 108 109 if (!(reg & PWRDOM_STAT_EMMC)) 110 do_fixup_by_compat(fdt, "calxeda,hb-sdhci", "status", 111 disabled, sizeof(disabled), 1); 112 113 return 0; 114 } 115 #endif 116 117 static int is_highbank(void) 118 { 119 uint32_t midr; 120 121 asm volatile ("mrc p15, 0, %0, c0, c0, 0\n" : "=r"(midr)); 122 123 return (midr & 0xfff0) == 0xc090; 124 } 125 126 void reset_cpu(ulong addr) 127 { 128 writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ); 129 if (is_highbank()) 130 writeb(HB_SCU_A9_PWR_OFF, HB_SCU_A9_PWR_STATUS); 131 else 132 writel(0x1, HB_SREG_A15_PWR_CTRL); 133 134 wfi(); 135 } 136 137 /* 138 * turn off the override before transferring control to Linux, since Linux 139 * may not support spread spectrum. 140 */ 141 void arch_preboot_os(void) 142 { 143 cphy_disable_overrides(); 144 } 145