board/highbank/highbank.c

   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(1);
  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 (getenv(envbuffer)) {
  84                 sprintf(envbuffer, "run bootcmd%d", boot_choice);
  85                 setenv("bootcmd", envbuffer);
  86         } else
  87                 setenv("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 void dram_init_banksize(void)
 100 {
 101         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 102         gd->bd->bi_dram[0].size =  PHYS_SDRAM_1_SIZE;
 103 }
 104
 105 #if defined(CONFIG_OF_BOARD_SETUP)
 106 int ft_board_setup(void *fdt, bd_t *bd)
 107 {
 108         static const char disabled[] = "disabled";
 109         u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
 110
 111         if (!(reg & PWRDOM_STAT_SATA))
 112                 do_fixup_by_compat(fdt, "calxeda,hb-ahci", "status",
 113                         disabled, sizeof(disabled), 1);
 114
 115         if (!(reg & PWRDOM_STAT_EMMC))
 116                 do_fixup_by_compat(fdt, "calxeda,hb-sdhci", "status",
 117                         disabled, sizeof(disabled), 1);
 118
 119         return 0;
 120 }
 121 #endif
 122
 123 static int is_highbank(void)
 124 {
 125         uint32_t midr;
 126
 127         asm volatile ("mrc p15, 0, %0, c0, c0, 0\n" : "=r"(midr));
 128
 129         return (midr & 0xfff0) == 0xc090;
 130 }
 131
 132 void reset_cpu(ulong addr)
 133 {
 134         writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ);
 135         if (is_highbank())
 136                 writeb(HB_SCU_A9_PWR_OFF, HB_SCU_A9_PWR_STATUS);
 137         else
 138                 writel(0x1, HB_SREG_A15_PWR_CTRL);
 139
 140         wfi();
 141 }
 142
 143 /*
 144  * turn off the override before transferring control to Linux, since Linux
 145  * may not support spread spectrum.
 146  */
 147 void arch_preboot_os(void)
 148 {
 149         cphy_disable_overrides();
 150 }