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 } 237