LXR uboot/arch/arm/mach-aspeed/ast2600/board

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (c) Aspeed Technology Inc.
   4 */
   5#include <common.h>
   6#include <dm.h>
   7#include <ram.h>
   8#include <timer.h>
   9#include <asm/io.h>
  10#include <asm/arch/timer.h>
  11#include <linux/bitops.h>
  12#include <linux/err.h>
  13#include <dm/uclass.h>
  14#include <asm/arch/scu_ast2600.h>
  15#include <asm/global_data.h>
  16
  17DECLARE_GLOBAL_DATA_PTR;
  18
  19/* Memory Control registers */
  20#define MCR_BASE                        0x1e6e0000
  21#define MCR_CONF                        (MCR_BASE + 0x004)
  22
  23/* bit fields of MCR_CONF */
  24#define MCR_CONF_ECC_EN                 BIT(7)
  25#define MCR_CONF_VGA_MEMSZ_MASK         GENMASK(3, 2)
  26#define MCR_CONF_VGA_MEMSZ_SHIFT        2
  27#define MCR_CONF_MEMSZ_MASK             GENMASK(1, 0)
  28#define MCR_CONF_MEMSZ_SHIFT            0
  29
  30int dram_init(void)
  31{
  32        int ret;
  33        struct udevice *dev;
  34        struct ram_info ram;
  35
  36        ret = uclass_get_device(UCLASS_RAM, 0, &dev);
  37        if (ret) {
  38                debug("cannot get DRAM driver\n");
  39                return ret;
  40        }
  41
  42        ret = ram_get_info(dev, &ram);
  43        if (ret) {
  44                debug("cannot get DRAM information\n");
  45                return ret;
  46        }
  47
  48        gd->ram_size = ram.size;
  49        return 0;
  50}
  51
  52int board_init(void)
  53{
  54        int i = 0, rc;
  55        struct udevice *dev;
  56
  57        gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
  58
  59        while (1) {
  60                rc = uclass_get_device(UCLASS_MISC, i++, &dev);
  61                if (rc)
  62                        break;
  63        }
  64
  65        return 0;
  66}
  67
  68void board_add_ram_info(int use_default)
  69{
  70        int rc;
  71        uint32_t conf;
  72        uint32_t ecc, act_size, vga_rsvd;
  73        struct udevice *scu_dev;
  74        struct ast2600_scu *scu;
  75
  76        rc = uclass_get_device_by_driver(UCLASS_CLK,
  77                                         DM_DRIVER_GET(aspeed_ast2600_scu), &scu_dev);
  78        if (rc) {
  79                debug("%s: cannot find SCU device, rc=%d\n", __func__, rc);
  80                return;
  81        }
  82
  83        scu = devfdt_get_addr_ptr(scu_dev);
  84        if (IS_ERR_OR_NULL(scu)) {
  85                debug("%s: cannot get SCU address pointer\n", __func__);
  86                return;
  87        }
  88
  89        conf = readl(MCR_CONF);
  90
  91        ecc = conf & MCR_CONF_ECC_EN;
  92        act_size = 0x100 << ((conf & MCR_CONF_MEMSZ_MASK) >> MCR_CONF_MEMSZ_SHIFT);
  93        vga_rsvd = 0x8 << ((conf & MCR_CONF_VGA_MEMSZ_MASK) >> MCR_CONF_VGA_MEMSZ_SHIFT);
  94
  95        /* no VGA reservation if efuse VGA disable bit is set */
  96        if (readl(scu->efuse) & SCU_EFUSE_DIS_VGA)
  97                vga_rsvd = 0;
  98
  99        printf(" (capacity:%d MiB, VGA:%d MiB), ECC %s", act_size,
 100               vga_rsvd, (ecc) ? "on" : "off");
 101}
 102
 103void enable_caches(void)
 104{
 105        /* get rid of the warning message */
 106}
 107