LXR uboot/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
  36DECLARE_GLOBAL_DATA_PTR;
  37
  38void cphy_disable_overrides(void);
  39
  40/*
  41 * Miscellaneous platform dependent initialisations
  42 */
  43int board_init(void)
  44{
  45        icache_enable();
  46
  47        return 0;
  48}
  49
  50/* We know all the init functions have been run now */
  51int 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
  63void 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
  76int 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
  93int dram_init(void)
  94{
  95        gd->ram_size = SZ_512M;
  96        return 0;
  97}
  98
  99#if defined(CONFIG_OF_BOARD_SETUP)
 100int 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
 117static 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
 126void 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 */
 141void arch_preboot_os(void)
 142{
 143        cphy_disable_overrides();
 144}
 145