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 <fdt_support.h>
  11 #include <init.h>
  12 #include <net.h>
  13 #include <netdev.h>
  14 #include <scsi.h>
  15
  16 #include <linux/sizes.h>
  17 #include <asm/io.h>
  18
  19 #define HB_AHCI_BASE                    0xffe08000
  20
  21 #define HB_SCU_A9_PWR_STATUS            0xfff10008
  22 #define HB_SREG_A9_PWR_REQ              0xfff3cf00
  23 #define HB_SREG_A9_BOOT_SRC_STAT        0xfff3cf04
  24 #define HB_SREG_A9_PWRDOM_STAT          0xfff3cf20
  25 #define HB_SREG_A15_PWR_CTRL            0xfff3c200
  26
  27 #define HB_PWR_SUSPEND                  0
  28 #define HB_PWR_SOFT_RESET               1
  29 #define HB_PWR_HARD_RESET               2
  30 #define HB_PWR_SHUTDOWN                 3
  31
  32 #define PWRDOM_STAT_SATA                0x80000000
  33 #define PWRDOM_STAT_PCI                 0x40000000
  34 #define PWRDOM_STAT_EMMC                0x20000000
  35
  36 #define HB_SCU_A9_PWR_NORMAL            0
  37 #define HB_SCU_A9_PWR_DORMANT           2
  38 #define HB_SCU_A9_PWR_OFF               3
  39
  40 DECLARE_GLOBAL_DATA_PTR;
  41
  42 void cphy_disable_overrides(void);
  43
  44 /*
  45  * Miscellaneous platform dependent initialisations
  46  */
  47 int board_init(void)
  48 {
  49         icache_enable();
  50
  51         return 0;
  52 }
  53
  54 /* We know all the init functions have been run now */
  55 int board_eth_init(bd_t *bis)
  56 {
  57         int rc = 0;
  58
  59 #ifdef CONFIG_CALXEDA_XGMAC
  60         rc += calxedaxgmac_initialize(0, 0xfff50000);
  61         rc += calxedaxgmac_initialize(1, 0xfff51000);
  62 #endif
  63         return rc;
  64 }
  65
  66 #ifdef CONFIG_SCSI_AHCI_PLAT
  67 void scsi_init(void)
  68 {
  69         u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
  70
  71         cphy_disable_overrides();
  72         if (reg & PWRDOM_STAT_SATA) {
  73                 ahci_init((void __iomem *)HB_AHCI_BASE);
  74                 scsi_scan(true);
  75         }
  76 }
  77 #endif
  78
  79 #ifdef CONFIG_MISC_INIT_R
  80 int misc_init_r(void)
  81 {
  82         char envbuffer[16];
  83         u32 boot_choice;
  84
  85         boot_choice = readl(HB_SREG_A9_BOOT_SRC_STAT) & 0xff;
  86         sprintf(envbuffer, "bootcmd%d", boot_choice);
  87         if (env_get(envbuffer)) {
  88                 sprintf(envbuffer, "run bootcmd%d", boot_choice);
  89                 env_set("bootcmd", envbuffer);
  90         } else
  91                 env_set("bootcmd", "");
  92
  93         return 0;
  94 }
  95 #endif
  96
  97 int dram_init(void)
  98 {
  99         gd->ram_size = SZ_512M;
 100         return 0;
 101 }
 102
 103 #if defined(CONFIG_OF_BOARD_SETUP)
 104 int ft_board_setup(void *fdt, bd_t *bd)
 105 {
 106         static const char disabled[] = "disabled";
 107         u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
 108
 109         if (!(reg & PWRDOM_STAT_SATA))
 110                 do_fixup_by_compat(fdt, "calxeda,hb-ahci", "status",
 111                         disabled, sizeof(disabled), 1);
 112
 113         if (!(reg & PWRDOM_STAT_EMMC))
 114                 do_fixup_by_compat(fdt, "calxeda,hb-sdhci", "status",
 115                         disabled, sizeof(disabled), 1);
 116
 117         return 0;
 118 }
 119 #endif
 120
 121 static int is_highbank(void)
 122 {
 123         uint32_t midr;
 124
 125         asm volatile ("mrc p15, 0, %0, c0, c0, 0\n" : "=r"(midr));
 126
 127         return (midr & 0xfff0) == 0xc090;
 128 }
 129
 130 void reset_cpu(ulong addr)
 131 {
 132         writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ);
 133         if (is_highbank())
 134                 writeb(HB_SCU_A9_PWR_OFF, HB_SCU_A9_PWR_STATUS);
 135         else
 136                 writel(0x1, HB_SREG_A15_PWR_CTRL);
 137
 138         wfi();
 139 }
 140
 141 /*
 142  * turn off the override before transferring control to Linux, since Linux
 143  * may not support spread spectrum.
 144  */
 145 void arch_preboot_os(void)
 146 {
 147         cphy_disable_overrides();
 148 }