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 <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  */
  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 */
  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
  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
  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
  94 int dram_init(void)
  95 {
  96         gd->ram_size = SZ_512M;
  97         return 0;
  98 }
  99
 100 #if defined(CONFIG_OF_BOARD_SETUP)
 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
 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
 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  */
 142 void arch_preboot_os(void)
 143 {
 144         cphy_disable_overrides();
 145 }