board/miromico/hammerhead/hammerhead.c

   1 /*
   2  * Copyright (C) 2008 Miromico AG
   3  *
   4  * Mostly copied form atmel ATNGW100 sources
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <netdev.h>
  11
  12 #include <asm/io.h>
  13 #include <asm/sdram.h>
  14 #include <asm/arch/clk.h>
  15 #include <asm/arch/hmatrix.h>
  16 #include <asm/arch/hardware.h>
  17 #include <asm/arch/mmu.h>
  18 #include <asm/arch/portmux.h>
  19
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 struct mmu_vm_range mmu_vmr_table[CONFIG_SYS_NR_VM_REGIONS] = {
  23         {
  24                 .virt_pgno      = CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT,
  25                 .nr_pages       = CONFIG_SYS_FLASH_SIZE >> PAGE_SHIFT,
  26                 .phys           = (CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT)
  27                                         | MMU_VMR_CACHE_NONE,
  28         }, {
  29                 .virt_pgno      = CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT,
  30                 .nr_pages       = EBI_SDRAM_SIZE >> PAGE_SHIFT,
  31                 .phys           = (CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT)
  32                                         | MMU_VMR_CACHE_WRBACK,
  33         },
  34 };
  35
  36 static const struct sdram_config sdram_config = {
  37         .data_bits      = SDRAM_DATA_32BIT,
  38         .row_bits       = 13,
  39         .col_bits       = 9,
  40         .bank_bits      = 2,
  41         .cas            = 3,
  42         .twr            = 2,
  43         .trc            = 7,
  44         .trp            = 2,
  45         .trcd           = 2,
  46         .tras           = 5,
  47         .txsr           = 5,
  48         /* 7.81 us */
  49         .refresh_period = (781 * (SDRAMC_BUS_HZ / 1000)) / 100000,
  50 };
  51
  52 #ifdef CONFIG_CMD_NET
  53 int board_eth_init(bd_t *bis)
  54 {
  55         return macb_eth_initialize(0, (void *)ATMEL_BASE_MACB0,
  56                 bis->bi_phy_id[0]);
  57 }
  58 #endif
  59
  60 int board_early_init_f(void)
  61 {
  62         /* Enable SDRAM in the EBI mux */
  63         hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
  64
  65         portmux_enable_ebi(32, 23, 0, PORTMUX_DRIVE_HIGH);
  66         portmux_enable_usart1(PORTMUX_DRIVE_MIN);
  67
  68 #if defined(CONFIG_MACB)
  69         portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_HIGH);
  70 #endif
  71 #if defined(CONFIG_MMC)
  72         portmux_enable_mmci(0, PORTMUX_MMCI_4BIT, PORTMUX_DRIVE_LOW);
  73 #endif
  74         return 0;
  75 }
  76
  77 phys_size_t initdram(int board_type)
  78 {
  79         unsigned long expected_size;
  80         unsigned long actual_size;
  81         void *sdram_base;
  82
  83         sdram_base = uncached(EBI_SDRAM_BASE);
  84
  85         expected_size = sdram_init(sdram_base, &sdram_config);
  86         actual_size = get_ram_size(sdram_base, expected_size);
  87
  88         if (expected_size != actual_size)
  89                 printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
  90                        actual_size >> 20, expected_size >> 20);
  91
  92         return actual_size;
  93 }
  94
  95 int board_early_init_r(void)
  96 {
  97         gd->bd->bi_phy_id[0] = 0x01;
  98         return 0;
  99 }
 100
 101 int board_postclk_init(void)
 102 {
 103         /* Hammerhead boards uses GCLK3 as 25MHz output to ethernet PHY */
 104         gclk_enable_output(3, PORTMUX_DRIVE_LOW);
 105         gclk_set_rate(3, GCLK_PARENT_OSC0, 25000000);
 106         return 0;
 107 }