arch/arm/mach-uniphier/micro-support-card.c

   1 /*
   2  * Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <linux/ctype.h>
   9 #include <linux/io.h>
  10
  11 #include "micro-support-card.h"
  12
  13 #define MICRO_SUPPORT_CARD_BASE         0x43f00000
  14 #define SMC911X_BASE                    ((MICRO_SUPPORT_CARD_BASE) + 0x00000)
  15 #define LED_BASE                        ((MICRO_SUPPORT_CARD_BASE) + 0x90000)
  16 #define NS16550A_BASE                   ((MICRO_SUPPORT_CARD_BASE) + 0xb0000)
  17 #define MICRO_SUPPORT_CARD_RESET        ((MICRO_SUPPORT_CARD_BASE) + 0xd0034)
  18 #define MICRO_SUPPORT_CARD_REVISION     ((MICRO_SUPPORT_CARD_BASE) + 0xd00E0)
  19
  20 /*
  21  * 0: reset deassert, 1: reset
  22  *
  23  * bit[0]: LAN, I2C, LED
  24  * bit[1]: UART
  25  */
  26 void support_card_reset_deassert(void)
  27 {
  28         writel(0, MICRO_SUPPORT_CARD_RESET);
  29 }
  30
  31 void support_card_reset(void)
  32 {
  33         writel(3, MICRO_SUPPORT_CARD_RESET);
  34 }
  35
  36 static int support_card_show_revision(void)
  37 {
  38         u32 revision;
  39
  40         revision = readl(MICRO_SUPPORT_CARD_REVISION);
  41         printf("(CPLD version %d.%d)\n", revision >> 4, revision & 0xf);
  42         return 0;
  43 }
  44
  45 int check_support_card(void)
  46 {
  47         printf("SC:    Micro Support Card ");
  48         return support_card_show_revision();
  49 }
  50
  51 void support_card_init(void)
  52 {
  53         /*
  54          * After power on, we need to keep the LAN controller in reset state
  55          * for a while. (200 usec)
  56          * Fortunately, enough wait time is already inserted in pll_init()
  57          * function. So we do not have to wait here.
  58          */
  59         support_card_reset_deassert();
  60 }
  61
  62 #if defined(CONFIG_SMC911X)
  63 #include <netdev.h>
  64
  65 int board_eth_init(bd_t *bis)
  66 {
  67         return smc911x_initialize(0, SMC911X_BASE);
  68 }
  69 #endif
  70
  71 #if !defined(CONFIG_SYS_NO_FLASH)
  72
  73 #include <mtd/cfi_flash.h>
  74
  75 struct memory_bank {
  76         phys_addr_t base;
  77         unsigned long size;
  78 };
  79
  80 static int mem_is_flash(const struct memory_bank *mem)
  81 {
  82         const int loop = 128;
  83         u32 *scratch_addr;
  84         u32 saved_value;
  85         int ret = 1;
  86         int i;
  87
  88         /* just in case, use the tail of the memory bank */
  89         scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop,
  90                                    sizeof(u32) * loop, MAP_NOCACHE);
  91
  92         for (i = 0; i < loop; i++, scratch_addr++) {
  93                 saved_value = readl(scratch_addr);
  94                 writel(~saved_value, scratch_addr);
  95                 if (readl(scratch_addr) != saved_value) {
  96                         /* We assume no memory or SRAM here. */
  97                         writel(saved_value, scratch_addr);
  98                         ret = 0;
  99                         break;
 100                 }
 101         }
 102
 103         unmap_physmem(scratch_addr, MAP_NOCACHE);
 104
 105         return ret;
 106 }
 107
 108 /* {address, size} */
 109 static const struct memory_bank memory_banks[] = {
 110         {0x42000000, 0x01f00000},
 111 };
 112
 113 static const struct memory_bank
 114 *flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT];
 115
 116 phys_addr_t cfi_flash_bank_addr(int i)
 117 {
 118         return flash_banks_list[i]->base;
 119 }
 120
 121 unsigned long cfi_flash_bank_size(int i)
 122 {
 123         return flash_banks_list[i]->size;
 124 }
 125
 126 static void detect_num_flash_banks(void)
 127 {
 128         const struct memory_bank *memory_bank, *end;
 129
 130         cfi_flash_num_flash_banks = 0;
 131
 132         memory_bank = memory_banks;
 133         end = memory_bank + ARRAY_SIZE(memory_banks);
 134
 135         for (; memory_bank < end; memory_bank++) {
 136                 if (cfi_flash_num_flash_banks >=
 137                     CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
 138                         break;
 139
 140                 if (mem_is_flash(memory_bank)) {
 141                         flash_banks_list[cfi_flash_num_flash_banks] =
 142                                                                 memory_bank;
 143
 144                         debug("flash bank found: base = 0x%lx, size = 0x%lx\n",
 145                               (unsigned long)memory_bank->base,
 146                               (unsigned long)memory_bank->size);
 147                         cfi_flash_num_flash_banks++;
 148                 }
 149         }
 150
 151         debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
 152 }
 153 #else /* CONFIG_SYS_NO_FLASH */
 154 void detect_num_flash_banks(void)
 155 {
 156 };
 157 #endif /* CONFIG_SYS_NO_FLASH */
 158
 159 void support_card_late_init(void)
 160 {
 161         detect_num_flash_banks();
 162 }
 163
 164 static const u8 ledval_num[] = {
 165         0x7e, /* 0 */
 166         0x0c, /* 1 */
 167         0xb6, /* 2 */
 168         0x9e, /* 3 */
 169         0xcc, /* 4 */
 170         0xda, /* 5 */
 171         0xfa, /* 6 */
 172         0x4e, /* 7 */
 173         0xfe, /* 8 */
 174         0xde, /* 9 */
 175 };
 176
 177 static const u8 ledval_alpha[] = {
 178         0xee, /* A */
 179         0xf8, /* B */
 180         0x72, /* C */
 181         0xbc, /* D */
 182         0xf2, /* E */
 183         0xe2, /* F */
 184         0x7a, /* G */
 185         0xe8, /* H */
 186         0x08, /* I */
 187         0x3c, /* J */
 188         0xea, /* K */
 189         0x70, /* L */
 190         0x6e, /* M */
 191         0xa8, /* N */
 192         0xb8, /* O */
 193         0xe6, /* P */
 194         0xce, /* Q */
 195         0xa0, /* R */
 196         0xc8, /* S */
 197         0x8c, /* T */
 198         0x7c, /* U */
 199         0x54, /* V */
 200         0xfc, /* W */
 201         0xec, /* X */
 202         0xdc, /* Y */
 203         0xa4, /* Z */
 204 };
 205
 206 static u8 char2ledval(char c)
 207 {
 208         if (isdigit(c))
 209                 return ledval_num[c - '0'];
 210         else if (isalpha(c))
 211                 return ledval_alpha[toupper(c) - 'A'];
 212
 213         return 0;
 214 }
 215
 216 void led_puts(const char *s)
 217 {
 218         int i;
 219         u32 val = 0;
 220
 221         if (!s)
 222                 return;
 223
 224         for (i = 0; i < 4; i++) {
 225                 val <<= 8;
 226                 val |= char2ledval(*s);
 227                 if (*s != '\0')
 228                         s++;
 229         }
 230
 231         writel(~val, LED_BASE);
 232 }