git.sur5r.net Git - u-boot/blob - arch/arm/mach-uniphier/micro-support-card.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2012-2015 Panasonic Corporation
   4  * Copyright (C) 2015-2016 Socionext Inc.
   5  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   6  */
   7
   8 #include <common.h>
   9 #include <linux/ctype.h>
  10 #include <linux/io.h>
  11
  12 #include "micro-support-card.h"
  13
  14 #define MICRO_SUPPORT_CARD_BASE         0x43f00000
  15 #define SMC911X_BASE                    ((MICRO_SUPPORT_CARD_BASE) + 0x00000)
  16 #define LED_BASE                        ((MICRO_SUPPORT_CARD_BASE) + 0x90000)
  17 #define NS16550A_BASE                   ((MICRO_SUPPORT_CARD_BASE) + 0xb0000)
  18 #define MICRO_SUPPORT_CARD_RESET        ((MICRO_SUPPORT_CARD_BASE) + 0xd0034)
  19 #define MICRO_SUPPORT_CARD_REVISION     ((MICRO_SUPPORT_CARD_BASE) + 0xd00E0)
  20
  21 /*
  22  * 0: reset deassert, 1: reset
  23  *
  24  * bit[0]: LAN, I2C, LED
  25  * bit[1]: UART
  26  */
  27 static void support_card_reset_deassert(void)
  28 {
  29         writel(0x00010000, MICRO_SUPPORT_CARD_RESET);
  30 }
  31
  32 static void support_card_reset(void)
  33 {
  34         writel(0x00020003, MICRO_SUPPORT_CARD_RESET);
  35 }
  36
  37 static int support_card_show_revision(void)
  38 {
  39         u32 revision;
  40
  41         revision = readl(MICRO_SUPPORT_CARD_REVISION);
  42         revision &= 0xff;
  43
  44         /* revision 3.6.x card changed the revision format */
  45         printf("SC:    Micro Support Card (CPLD version %s%d.%d)\n",
  46                revision >> 4 == 6 ? "3." : "",
  47                revision >> 4, revision & 0xf);
  48
  49         return 0;
  50 }
  51
  52 void support_card_init(void)
  53 {
  54         support_card_reset();
  55         /*
  56          * After power on, we need to keep the LAN controller in reset state
  57          * for a while. (200 usec)
  58          */
  59         udelay(200);
  60         support_card_reset_deassert();
  61
  62         support_card_show_revision();
  63 }
  64
  65 #if defined(CONFIG_SMC911X)
  66 #include <netdev.h>
  67
  68 int board_eth_init(bd_t *bis)
  69 {
  70         return smc911x_initialize(0, SMC911X_BASE);
  71 }
  72 #endif
  73
  74 #if defined(CONFIG_MTD_NOR_FLASH)
  75
  76 #include <mtd/cfi_flash.h>
  77
  78 struct memory_bank {
  79         phys_addr_t base;
  80         unsigned long size;
  81 };
  82
  83 static int mem_is_flash(const struct memory_bank *mem)
  84 {
  85         const int loop = 128;
  86         u32 *scratch_addr;
  87         u32 saved_value;
  88         int ret = 1;
  89         int i;
  90
  91         /* just in case, use the tail of the memory bank */
  92         scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop,
  93                                    sizeof(u32) * loop, MAP_NOCACHE);
  94
  95         for (i = 0; i < loop; i++, scratch_addr++) {
  96                 saved_value = readl(scratch_addr);
  97                 writel(~saved_value, scratch_addr);
  98                 if (readl(scratch_addr) != saved_value) {
  99                         /* We assume no memory or SRAM here. */
 100                         writel(saved_value, scratch_addr);
 101                         ret = 0;
 102                         break;
 103                 }
 104         }
 105
 106         unmap_physmem(scratch_addr, MAP_NOCACHE);
 107
 108         return ret;
 109 }
 110
 111 /* {address, size} */
 112 static const struct memory_bank memory_banks[] = {
 113         {0x42000000, 0x01f00000},
 114 };
 115
 116 static const struct memory_bank
 117 *flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT];
 118
 119 phys_addr_t cfi_flash_bank_addr(int i)
 120 {
 121         return flash_banks_list[i]->base;
 122 }
 123
 124 unsigned long cfi_flash_bank_size(int i)
 125 {
 126         return flash_banks_list[i]->size;
 127 }
 128
 129 static void detect_num_flash_banks(void)
 130 {
 131         const struct memory_bank *memory_bank, *end;
 132
 133         cfi_flash_num_flash_banks = 0;
 134
 135         memory_bank = memory_banks;
 136         end = memory_bank + ARRAY_SIZE(memory_banks);
 137
 138         for (; memory_bank < end; memory_bank++) {
 139                 if (cfi_flash_num_flash_banks >=
 140                     CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
 141                         break;
 142
 143                 if (mem_is_flash(memory_bank)) {
 144                         flash_banks_list[cfi_flash_num_flash_banks] =
 145                                                                 memory_bank;
 146
 147                         debug("flash bank found: base = 0x%lx, size = 0x%lx\n",
 148                               (unsigned long)memory_bank->base,
 149                               (unsigned long)memory_bank->size);
 150                         cfi_flash_num_flash_banks++;
 151                 }
 152         }
 153
 154         debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
 155 }
 156 #else /* CONFIG_MTD_NOR_FLASH */
 157 static void detect_num_flash_banks(void)
 158 {
 159 };
 160 #endif /* CONFIG_MTD_NOR_FLASH */
 161
 162 void support_card_late_init(void)
 163 {
 164         detect_num_flash_banks();
 165 }
 166
 167 static const u8 ledval_num[] = {
 168         0x7e, /* 0 */
 169         0x0c, /* 1 */
 170         0xb6, /* 2 */
 171         0x9e, /* 3 */
 172         0xcc, /* 4 */
 173         0xda, /* 5 */
 174         0xfa, /* 6 */
 175         0x4e, /* 7 */
 176         0xfe, /* 8 */
 177         0xde, /* 9 */
 178 };
 179
 180 static const u8 ledval_alpha[] = {
 181         0xee, /* A */
 182         0xf8, /* B */
 183         0x72, /* C */
 184         0xbc, /* D */
 185         0xf2, /* E */
 186         0xe2, /* F */
 187         0x7a, /* G */
 188         0xe8, /* H */
 189         0x08, /* I */
 190         0x3c, /* J */
 191         0xea, /* K */
 192         0x70, /* L */
 193         0x6e, /* M */
 194         0xa8, /* N */
 195         0xb8, /* O */
 196         0xe6, /* P */
 197         0xce, /* Q */
 198         0xa0, /* R */
 199         0xc8, /* S */
 200         0x8c, /* T */
 201         0x7c, /* U */
 202         0x54, /* V */
 203         0xfc, /* W */
 204         0xec, /* X */
 205         0xdc, /* Y */
 206         0xa4, /* Z */
 207 };
 208
 209 static u8 char2ledval(char c)
 210 {
 211         if (isdigit(c))
 212                 return ledval_num[c - '0'];
 213         else if (isalpha(c))
 214                 return ledval_alpha[toupper(c) - 'A'];
 215
 216         return 0;
 217 }
 218
 219 void led_puts(const char *s)
 220 {
 221         int i;
 222         u32 val = 0;
 223
 224         if (!s)
 225                 return;
 226
 227         for (i = 0; i < 4; i++) {
 228                 val <<= 8;
 229                 val |= char2ledval(*s);
 230                 if (*s != '\0')
 231                         s++;
 232         }
 233
 234         writel(~val, LED_BASE);
 235 }