arch/arm/mach-uniphier/support_card.c

   1 /*
   2  * Copyright (C) 2012-2015 Panasonic Corporation
   3  * Copyright (C) 2015      Socionext Inc.
   4  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <asm/io.h>
  11 #include <mach/board.h>
  12
  13 #if defined(CONFIG_PFC_MICRO_SUPPORT_CARD)
  14
  15 #define PFC_MICRO_SUPPORT_CARD_RESET    \
  16                                 ((CONFIG_SUPPORT_CARD_BASE) + 0x000D0034)
  17 #define PFC_MICRO_SUPPORT_CARD_REVISION \
  18                                 ((CONFIG_SUPPORT_CARD_BASE) + 0x000D00E0)
  19 /*
  20  * 0: reset deassert, 1: reset
  21  *
  22  * bit[0]: LAN, I2C, LED
  23  * bit[1]: UART
  24  */
  25 void support_card_reset_deassert(void)
  26 {
  27         writel(0, PFC_MICRO_SUPPORT_CARD_RESET);
  28 }
  29
  30 void support_card_reset(void)
  31 {
  32         writel(3, PFC_MICRO_SUPPORT_CARD_RESET);
  33 }
  34
  35 static int support_card_show_revision(void)
  36 {
  37         u32 revision;
  38
  39         revision = readl(PFC_MICRO_SUPPORT_CARD_REVISION);
  40         printf("(PFC CPLD version %d.%d)\n", revision >> 4, revision & 0xf);
  41         return 0;
  42 }
  43 #endif
  44
  45 #if defined(CONFIG_DCC_MICRO_SUPPORT_CARD)
  46
  47 #define DCC_MICRO_SUPPORT_CARD_RESET_LAN        \
  48                                 ((CONFIG_SUPPORT_CARD_BASE) + 0x00401300)
  49 #define DCC_MICRO_SUPPORT_CARD_RESET_UART       \
  50                                 ((CONFIG_SUPPORT_CARD_BASE) + 0x00401304)
  51 #define DCC_MICRO_SUPPORT_CARD_RESET_I2C        \
  52                                 ((CONFIG_SUPPORT_CARD_BASE) + 0x00401308)
  53 #define DCC_MICRO_SUPPORT_CARD_REVISION         \
  54                                 ((CONFIG_SUPPORT_CARD_BASE) + 0x005000E0)
  55
  56 void support_card_reset_deassert(void)
  57 {
  58         writel(1, DCC_MICRO_SUPPORT_CARD_RESET_LAN); /* LAN and LED */
  59         writel(1, DCC_MICRO_SUPPORT_CARD_RESET_UART); /* UART */
  60         writel(1, DCC_MICRO_SUPPORT_CARD_RESET_I2C); /* I2C */
  61 }
  62
  63 void support_card_reset(void)
  64 {
  65         writel(0, DCC_MICRO_SUPPORT_CARD_RESET_LAN); /* LAN and LED */
  66         writel(0, DCC_MICRO_SUPPORT_CARD_RESET_UART); /* UART */
  67         writel(0, DCC_MICRO_SUPPORT_CARD_RESET_I2C); /* I2C */
  68 }
  69
  70 static int support_card_show_revision(void)
  71 {
  72         u32 revision;
  73
  74         revision = readl(DCC_MICRO_SUPPORT_CARD_REVISION);
  75
  76         if (revision >= 0x67) {
  77                 printf("(DCC CPLD version 3.%d.%d)\n",
  78                        revision >> 4, revision & 0xf);
  79                 return 0;
  80         } else {
  81                 printf("(DCC CPLD unknown version)\n");
  82                 return -1;
  83         }
  84 }
  85 #endif
  86
  87 int check_support_card(void)
  88 {
  89         printf("SC:    Micro Support Card ");
  90         return support_card_show_revision();
  91 }
  92
  93 void support_card_init(void)
  94 {
  95         /*
  96          * After power on, we need to keep the LAN controller in reset state
  97          * for a while. (200 usec)
  98          * Fortunately, enough wait time is already inserted in pll_init()
  99          * function. So we do not have to wait here.
 100          */
 101         support_card_reset_deassert();
 102 }
 103
 104 #if defined(CONFIG_SMC911X)
 105 #include <netdev.h>
 106
 107 int board_eth_init(bd_t *bis)
 108 {
 109         return smc911x_initialize(0, CONFIG_SMC911X_BASE);
 110 }
 111 #endif
 112
 113 #if !defined(CONFIG_SYS_NO_FLASH)
 114
 115 #include <mtd/cfi_flash.h>
 116 #include <mach/sbc-regs.h>
 117
 118 struct memory_bank {
 119         phys_addr_t base;
 120         unsigned long size;
 121 };
 122
 123 static int mem_is_flash(const struct memory_bank *mem)
 124 {
 125         const int loop = 128;
 126         u32 *scratch_addr;
 127         u32 saved_value;
 128         int ret = 1;
 129         int i;
 130
 131         /* just in case, use the tail of the memory bank */
 132         scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop,
 133                                    sizeof(u32) * loop, MAP_NOCACHE);
 134
 135         for (i = 0; i < loop; i++, scratch_addr++) {
 136                 saved_value = readl(scratch_addr);
 137                 writel(~saved_value, scratch_addr);
 138                 if (readl(scratch_addr) != saved_value) {
 139                         /* We assume no memory or SRAM here. */
 140                         writel(saved_value, scratch_addr);
 141                         ret = 0;
 142                         break;
 143                 }
 144         }
 145
 146         unmap_physmem(scratch_addr, MAP_NOCACHE);
 147
 148         return ret;
 149 }
 150
 151 #if defined(CONFIG_PFC_MICRO_SUPPORT_CARD)
 152         /* {address, size} */
 153 static const struct memory_bank memory_banks_boot_swap_off[] = {
 154         {0x02000000, 0x01f00000},
 155 };
 156
 157 static const struct memory_bank memory_banks_boot_swap_on[] = {
 158         {0x00000000, 0x01f00000},
 159 };
 160 #endif
 161
 162 #if defined(CONFIG_DCC_MICRO_SUPPORT_CARD)
 163 static const struct memory_bank memory_banks_boot_swap_off[] = {
 164         {0x04000000, 0x02000000},
 165 };
 166
 167 static const struct memory_bank memory_banks_boot_swap_on[] = {
 168         {0x00000000, 0x02000000},
 169         {0x04000000, 0x02000000},
 170 };
 171 #endif
 172
 173 static const struct memory_bank
 174 *flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT];
 175
 176 phys_addr_t cfi_flash_bank_addr(int i)
 177 {
 178         return flash_banks_list[i]->base;
 179 }
 180
 181 unsigned long cfi_flash_bank_size(int i)
 182 {
 183         return flash_banks_list[i]->size;
 184 }
 185
 186 static void detect_num_flash_banks(void)
 187 {
 188         const struct memory_bank *memory_bank, *end;
 189
 190         cfi_flash_num_flash_banks = 0;
 191
 192         if (boot_is_swapped()) {
 193                 memory_bank = memory_banks_boot_swap_on;
 194                 end = memory_bank + ARRAY_SIZE(memory_banks_boot_swap_on);
 195         } else {
 196                 memory_bank = memory_banks_boot_swap_off;
 197                 end = memory_bank + ARRAY_SIZE(memory_banks_boot_swap_off);
 198         }
 199
 200         for (; memory_bank < end; memory_bank++) {
 201                 if (cfi_flash_num_flash_banks >=
 202                     CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
 203                         break;
 204
 205                 if (mem_is_flash(memory_bank)) {
 206                         flash_banks_list[cfi_flash_num_flash_banks] =
 207                                                                 memory_bank;
 208
 209                         debug("flash bank found: base = 0x%lx, size = 0x%lx\n",
 210                               memory_bank->base, memory_bank->size);
 211                         cfi_flash_num_flash_banks++;
 212                 }
 213         }
 214
 215         debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
 216 }
 217 #else /* CONFIG_SYS_NO_FLASH */
 218 void detect_num_flash_banks(void)
 219 {
 220 };
 221 #endif /* CONFIG_SYS_NO_FLASH */
 222
 223 void support_card_late_init(void)
 224 {
 225         detect_num_flash_banks();
 226 }