board/earthlcd/favr-32-ezkit/favr-32-ezkit.c

   1 /*
   2  * Copyright (C) 2008 Atmel Corporation
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6 #include <common.h>
   7 #include <netdev.h>
   8
   9 #include <asm/io.h>
  10 #include <asm/sdram.h>
  11 #include <asm/arch/clk.h>
  12 #include <asm/arch/hmatrix.h>
  13 #include <asm/arch/mmu.h>
  14 #include <asm/arch/portmux.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 struct mmu_vm_range mmu_vmr_table[CONFIG_SYS_NR_VM_REGIONS] = {
  19         {
  20                 .virt_pgno      = CONFIG_SYS_FLASH_BASE >> MMU_PAGE_SHIFT,
  21                 .nr_pages       = CONFIG_SYS_FLASH_SIZE >> MMU_PAGE_SHIFT,
  22                 .phys           = (CONFIG_SYS_FLASH_BASE >> MMU_PAGE_SHIFT)
  23                                         | MMU_VMR_CACHE_NONE,
  24         }, {
  25                 .virt_pgno      = CONFIG_SYS_SDRAM_BASE >> MMU_PAGE_SHIFT,
  26                 .nr_pages       = EBI_SDRAM_SIZE >> MMU_PAGE_SHIFT,
  27                 .phys           = (CONFIG_SYS_SDRAM_BASE >> MMU_PAGE_SHIFT)
  28                                         | MMU_VMR_CACHE_WRBACK,
  29         },
  30 };
  31
  32 static const struct sdram_config sdram_config = {
  33         /* MT48LC4M32B2P-6 (16 MB) */
  34         .data_bits      = SDRAM_DATA_32BIT,
  35         .row_bits       = 12,
  36         .col_bits       = 8,
  37         .bank_bits      = 2,
  38         .cas            = 3,
  39         .twr            = 2,
  40         .trc            = 7,
  41         .trp            = 2,
  42         .trcd           = 2,
  43         .tras           = 5,
  44         .txsr           = 5,
  45         /* 15.6 us */
  46         .refresh_period = (156 * (SDRAMC_BUS_HZ / 1000)) / 10000,
  47 };
  48
  49 int board_early_init_f(void)
  50 {
  51         /* Enable SDRAM in the EBI mux */
  52         hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
  53
  54         portmux_enable_ebi(32, 23, 0, PORTMUX_DRIVE_HIGH);
  55         portmux_enable_usart3(PORTMUX_DRIVE_MIN);
  56 #if defined(CONFIG_MACB)
  57         portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_HIGH);
  58 #endif
  59 #if defined(CONFIG_MMC)
  60         portmux_enable_mmci(0, PORTMUX_MMCI_4BIT, PORTMUX_DRIVE_LOW);
  61 #endif
  62
  63         return 0;
  64 }
  65
  66 phys_size_t initdram(int board_type)
  67 {
  68         unsigned long expected_size;
  69         unsigned long actual_size;
  70         void *sdram_base;
  71
  72         sdram_base = uncached(EBI_SDRAM_BASE);
  73
  74         expected_size = sdram_init(sdram_base, &sdram_config);
  75         actual_size = get_ram_size(sdram_base, expected_size);
  76
  77         if (expected_size != actual_size)
  78                 printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
  79                                 actual_size >> 20, expected_size >> 20);
  80
  81         return actual_size;
  82 }
  83
  84 int board_early_init_r(void)
  85 {
  86         gd->bd->bi_phy_id[0] = 0x01;
  87         return 0;
  88 }
  89
  90 #if defined(CONFIG_MACB) && defined(CONFIG_CMD_NET)
  91 int board_eth_init(bd_t *bi)
  92 {
  93         return macb_eth_initialize(0, (void *)ATMEL_BASE_MACB0,
  94                 bi->bi_phy_id[0]);
  95 }
  96 #endif