board/highbank/highbank.c

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