LXR uboot/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 <fdtdec.h>
  12#include <init.h>
  13#include <net.h>
  14#include <scsi.h>
  15#include <asm/global_data.h>
  16
  17#include <linux/sizes.h>
  18#include <asm/io.h>
  19
  20#define HB_AHCI_BASE                    0xffe08000
  21
  22#define HB_SCU_A9_PWR_STATUS            0xfff10008
  23#define HB_SREG_A9_PWR_REQ              0xfff3cf00
  24#define HB_SREG_A9_BOOT_SRC_STAT        0xfff3cf04
  25#define HB_SREG_A9_PWRDOM_STAT          0xfff3cf20
  26#define HB_SREG_A15_PWR_CTRL            0xfff3c200
  27
  28#define HB_PWR_SUSPEND                  0
  29#define HB_PWR_SOFT_RESET               1
  30#define HB_PWR_HARD_RESET               2
  31#define HB_PWR_SHUTDOWN                 3
  32
  33#define PWRDOM_STAT_SATA                0x80000000
  34#define PWRDOM_STAT_PCI                 0x40000000
  35#define PWRDOM_STAT_EMMC                0x20000000
  36
  37#define HB_SCU_A9_PWR_NORMAL            0
  38#define HB_SCU_A9_PWR_DORMANT           2
  39#define HB_SCU_A9_PWR_OFF               3
  40
  41DECLARE_GLOBAL_DATA_PTR;
  42
  43void cphy_disable_overrides(void);
  44
  45/*
  46 * Miscellaneous platform dependent initialisations
  47 */
  48int board_init(void)
  49{
  50        icache_enable();
  51
  52        return 0;
  53}
  54
  55#ifdef CONFIG_SCSI_AHCI_PLAT
  56void scsi_init(void)
  57{
  58        u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
  59
  60        cphy_disable_overrides();
  61        if (reg & PWRDOM_STAT_SATA) {
  62                ahci_init((void __iomem *)HB_AHCI_BASE);
  63                scsi_scan(true);
  64        }
  65}
  66#endif
  67
  68#ifdef CONFIG_MISC_INIT_R
  69int misc_init_r(void)
  70{
  71        char envbuffer[16];
  72        u32 boot_choice;
  73
  74        boot_choice = readl(HB_SREG_A9_BOOT_SRC_STAT) & 0xff;
  75        sprintf(envbuffer, "bootcmd%d", boot_choice);
  76        if (env_get(envbuffer)) {
  77                sprintf(envbuffer, "run bootcmd%d", boot_choice);
  78                env_set("bootcmd", envbuffer);
  79        } else
  80                env_set("bootcmd", "");
  81
  82        return 0;
  83}
  84#endif
  85
  86int dram_init(void)
  87{
  88        return fdtdec_setup_mem_size_base();
  89}
  90
  91int dram_init_banksize(void)
  92{
  93        return fdtdec_setup_memory_banksize();
  94}
  95
  96#if defined(CONFIG_OF_BOARD_SETUP)
  97int ft_board_setup(void *fdt, struct bd_info *bd)
  98{
  99        static const char disabled[] = "disabled";
 100        u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
 101
 102        if (!(reg & PWRDOM_STAT_SATA))
 103                do_fixup_by_compat(fdt, "calxeda,hb-ahci", "status",
 104                        disabled, sizeof(disabled), 1);
 105
 106        if (!(reg & PWRDOM_STAT_EMMC))
 107                do_fixup_by_compat(fdt, "calxeda,hb-sdhci", "status",
 108                        disabled, sizeof(disabled), 1);
 109
 110        return 0;
 111}
 112#endif
 113
 114void *board_fdt_blob_setup(int *err)
 115{
 116        *err = 0;
 117        /*
 118         * The ECME management processor loads the DTB from NOR flash
 119         * into DRAM (at 4KB), where it gets patched to contain the
 120         * detected memory size.
 121         */
 122        return (void *)0x1000;
 123}
 124
 125static int is_highbank(void)
 126{
 127        uint32_t midr;
 128
 129        asm volatile ("mrc p15, 0, %0, c0, c0, 0\n" : "=r"(midr));
 130
 131        return (midr & 0xfff0) == 0xc090;
 132}
 133
 134void reset_cpu(void)
 135{
 136        writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ);
 137        if (is_highbank())
 138                writeb(HB_SCU_A9_PWR_OFF, HB_SCU_A9_PWR_STATUS);
 139        else
 140                writel(0x1, HB_SREG_A15_PWR_CTRL);
 141
 142        wfi();
 143}
 144
 145/*
 146 * turn off the override before transferring control to Linux, since Linux
 147 * may not support spread spectrum.
 148 */
 149void arch_preboot_os(void)
 150{
 151        cphy_disable_overrides();
 152}
 153