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

   1 /*
   2  * Copyright (C) 2012-2015 Panasonic Corporation
   3  * Copyright (C) 2015-2016 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 <linux/ctype.h>
  11 #include <linux/io.h>
  12
  13 #include "micro-support-card.h"
  14
  15 #define MICRO_SUPPORT_CARD_BASE         0x43f00000
  16 #define SMC911X_BASE                    ((MICRO_SUPPORT_CARD_BASE) + 0x00000)
  17 #define LED_BASE                        ((MICRO_SUPPORT_CARD_BASE) + 0x90000)
  18 #define NS16550A_BASE                   ((MICRO_SUPPORT_CARD_BASE) + 0xb0000)
  19 #define MICRO_SUPPORT_CARD_RESET        ((MICRO_SUPPORT_CARD_BASE) + 0xd0034)
  20 #define MICRO_SUPPORT_CARD_REVISION     ((MICRO_SUPPORT_CARD_BASE) + 0xd00E0)
  21
  22 /*
  23  * 0: reset deassert, 1: reset
  24  *
  25  * bit[0]: LAN, I2C, LED
  26  * bit[1]: UART
  27  */
  28 static void support_card_reset_deassert(void)
  29 {
  30         writel(0x00010000, MICRO_SUPPORT_CARD_RESET);
  31 }
  32
  33 static void support_card_reset(void)
  34 {
  35         writel(0x00020003, MICRO_SUPPORT_CARD_RESET);
  36 }
  37
  38 static int support_card_show_revision(void)
  39 {
  40         u32 revision;
  41
  42         revision = readl(MICRO_SUPPORT_CARD_REVISION);
  43         revision &= 0xff;
  44
  45         /* revision 3.6.x card changed the revision format */
  46         printf("SC:    Micro Support Card (CPLD version %s%d.%d)\n",
  47                revision >> 4 == 6 ? "3." : "",
  48                revision >> 4, revision & 0xf);
  49
  50         return 0;
  51 }
  52
  53 void support_card_init(void)
  54 {
  55         support_card_reset();
  56         /*
  57          * After power on, we need to keep the LAN controller in reset state
  58          * for a while. (200 usec)
  59          */
  60         udelay(200);
  61         support_card_reset_deassert();
  62
  63         support_card_show_revision();
  64 }
  65
  66 #if defined(CONFIG_SMC911X)
  67 #include <netdev.h>
  68
  69 int board_eth_init(bd_t *bis)
  70 {
  71         return smc911x_initialize(0, SMC911X_BASE);
  72 }
  73 #endif
  74
  75 #if defined(CONFIG_MTD_NOR_FLASH)
  76
  77 #include <mtd/cfi_flash.h>
  78
  79 struct memory_bank {
  80         phys_addr_t base;
  81         unsigned long size;
  82 };
  83
  84 static int mem_is_flash(const struct memory_bank *mem)
  85 {
  86         const int loop = 128;
  87         u32 *scratch_addr;
  88         u32 saved_value;
  89         int ret = 1;
  90         int i;
  91
  92         /* just in case, use the tail of the memory bank */
  93         scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop,
  94                                    sizeof(u32) * loop, MAP_NOCACHE);
  95
  96         for (i = 0; i < loop; i++, scratch_addr++) {
  97                 saved_value = readl(scratch_addr);
  98                 writel(~saved_value, scratch_addr);
  99                 if (readl(scratch_addr) != saved_value) {
 100                         /* We assume no memory or SRAM here. */
 101                         writel(saved_value, scratch_addr);
 102                         ret = 0;
 103                         break;
 104                 }
 105         }
 106
 107         unmap_physmem(scratch_addr, MAP_NOCACHE);
 108
 109         return ret;
 110 }
 111
 112 /* {address, size} */
 113 static const struct memory_bank memory_banks[] = {
 114         {0x42000000, 0x01f00000},
 115 };
 116
 117 static const struct memory_bank
 118 *flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT];
 119
 120 phys_addr_t cfi_flash_bank_addr(int i)
 121 {
 122         return flash_banks_list[i]->base;
 123 }
 124
 125 unsigned long cfi_flash_bank_size(int i)
 126 {
 127         return flash_banks_list[i]->size;
 128 }
 129
 130 static void detect_num_flash_banks(void)
 131 {
 132         const struct memory_bank *memory_bank, *end;
 133
 134         cfi_flash_num_flash_banks = 0;
 135
 136         memory_bank = memory_banks;
 137         end = memory_bank + ARRAY_SIZE(memory_banks);
 138
 139         for (; memory_bank < end; memory_bank++) {
 140                 if (cfi_flash_num_flash_banks >=
 141                     CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
 142                         break;
 143
 144                 if (mem_is_flash(memory_bank)) {
 145                         flash_banks_list[cfi_flash_num_flash_banks] =
 146                                                                 memory_bank;
 147
 148                         debug("flash bank found: base = 0x%lx, size = 0x%lx\n",
 149                               (unsigned long)memory_bank->base,
 150                               (unsigned long)memory_bank->size);
 151                         cfi_flash_num_flash_banks++;
 152                 }
 153         }
 154
 155         debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
 156 }
 157 #else /* CONFIG_MTD_NOR_FLASH */
 158 static void detect_num_flash_banks(void)
 159 {
 160 };
 161 #endif /* CONFIG_MTD_NOR_FLASH */
 162
 163 void support_card_late_init(void)
 164 {
 165         detect_num_flash_banks();
 166 }
 167
 168 static const u8 ledval_num[] = {
 169         0x7e, /* 0 */
 170         0x0c, /* 1 */
 171         0xb6, /* 2 */
 172         0x9e, /* 3 */
 173         0xcc, /* 4 */
 174         0xda, /* 5 */
 175         0xfa, /* 6 */
 176         0x4e, /* 7 */
 177         0xfe, /* 8 */
 178         0xde, /* 9 */
 179 };
 180
 181 static const u8 ledval_alpha[] = {
 182         0xee, /* A */
 183         0xf8, /* B */
 184         0x72, /* C */
 185         0xbc, /* D */
 186         0xf2, /* E */
 187         0xe2, /* F */
 188         0x7a, /* G */
 189         0xe8, /* H */
 190         0x08, /* I */
 191         0x3c, /* J */
 192         0xea, /* K */
 193         0x70, /* L */
 194         0x6e, /* M */
 195         0xa8, /* N */
 196         0xb8, /* O */
 197         0xe6, /* P */
 198         0xce, /* Q */
 199         0xa0, /* R */
 200         0xc8, /* S */
 201         0x8c, /* T */
 202         0x7c, /* U */
 203         0x54, /* V */
 204         0xfc, /* W */
 205         0xec, /* X */
 206         0xdc, /* Y */
 207         0xa4, /* Z */
 208 };
 209
 210 static u8 char2ledval(char c)
 211 {
 212         if (isdigit(c))
 213                 return ledval_num[c - '0'];
 214         else if (isalpha(c))
 215                 return ledval_alpha[toupper(c) - 'A'];
 216
 217         return 0;
 218 }
 219
 220 void led_puts(const char *s)
 221 {
 222         int i;
 223         u32 val = 0;
 224
 225         if (!s)
 226                 return;
 227
 228         for (i = 0; i < 4; i++) {
 229                 val <<= 8;
 230                 val |= char2ledval(*s);
 231                 if (*s != '\0')
 232                         s++;
 233         }
 234
 235         writel(~val, LED_BASE);
 236 }