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 void support_card_reset_deassert(void) 29 { 30 writel(0x00010000, MICRO_SUPPORT_CARD_RESET); 31 } 32 33 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("(CPLD version %s%d.%d)\n", revision >> 4 == 6 ? "3." : "", 47 revision >> 4, revision & 0xf); 48 49 return 0; 50 } 51 52 int checkboard(void) 53 { 54 printf("SC: Micro Support Card "); 55 return support_card_show_revision(); 56 } 57 58 void support_card_init(void) 59 { 60 /* 61 * After power on, we need to keep the LAN controller in reset state 62 * for a while. (200 usec) 63 */ 64 udelay(200); 65 support_card_reset_deassert(); 66 } 67 68 #if defined(CONFIG_SMC911X) 69 #include <netdev.h> 70 71 int board_eth_init(bd_t *bis) 72 { 73 return smc911x_initialize(0, SMC911X_BASE); 74 } 75 #endif 76 77 #if !defined(CONFIG_SYS_NO_FLASH) 78 79 #include <mtd/cfi_flash.h> 80 81 struct memory_bank { 82 phys_addr_t base; 83 unsigned long size; 84 }; 85 86 static int mem_is_flash(const struct memory_bank *mem) 87 { 88 const int loop = 128; 89 u32 *scratch_addr; 90 u32 saved_value; 91 int ret = 1; 92 int i; 93 94 /* just in case, use the tail of the memory bank */ 95 scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop, 96 sizeof(u32) * loop, MAP_NOCACHE); 97 98 for (i = 0; i < loop; i++, scratch_addr++) { 99 saved_value = readl(scratch_addr); 100 writel(~saved_value, scratch_addr); 101 if (readl(scratch_addr) != saved_value) { 102 /* We assume no memory or SRAM here. */ 103 writel(saved_value, scratch_addr); 104 ret = 0; 105 break; 106 } 107 } 108 109 unmap_physmem(scratch_addr, MAP_NOCACHE); 110 111 return ret; 112 } 113 114 /* {address, size} */ 115 static const struct memory_bank memory_banks[] = { 116 {0x42000000, 0x01f00000}, 117 }; 118 119 static const struct memory_bank 120 *flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT]; 121 122 phys_addr_t cfi_flash_bank_addr(int i) 123 { 124 return flash_banks_list[i]->base; 125 } 126 127 unsigned long cfi_flash_bank_size(int i) 128 { 129 return flash_banks_list[i]->size; 130 } 131 132 static void detect_num_flash_banks(void) 133 { 134 const struct memory_bank *memory_bank, *end; 135 136 cfi_flash_num_flash_banks = 0; 137 138 memory_bank = memory_banks; 139 end = memory_bank + ARRAY_SIZE(memory_banks); 140 141 for (; memory_bank < end; memory_bank++) { 142 if (cfi_flash_num_flash_banks >= 143 CONFIG_SYS_MAX_FLASH_BANKS_DETECT) 144 break; 145 146 if (mem_is_flash(memory_bank)) { 147 flash_banks_list[cfi_flash_num_flash_banks] = 148 memory_bank; 149 150 debug("flash bank found: base = 0x%lx, size = 0x%lx\n", 151 (unsigned long)memory_bank->base, 152 (unsigned long)memory_bank->size); 153 cfi_flash_num_flash_banks++; 154 } 155 } 156 157 debug("number of flash banks: %d\n", cfi_flash_num_flash_banks); 158 } 159 #else /* CONFIG_SYS_NO_FLASH */ 160 void detect_num_flash_banks(void) 161 { 162 }; 163 #endif /* CONFIG_SYS_NO_FLASH */ 164 165 void support_card_late_init(void) 166 { 167 detect_num_flash_banks(); 168 } 169 170 static const u8 ledval_num[] = { 171 0x7e, /* 0 */ 172 0x0c, /* 1 */ 173 0xb6, /* 2 */ 174 0x9e, /* 3 */ 175 0xcc, /* 4 */ 176 0xda, /* 5 */ 177 0xfa, /* 6 */ 178 0x4e, /* 7 */ 179 0xfe, /* 8 */ 180 0xde, /* 9 */ 181 }; 182 183 static const u8 ledval_alpha[] = { 184 0xee, /* A */ 185 0xf8, /* B */ 186 0x72, /* C */ 187 0xbc, /* D */ 188 0xf2, /* E */ 189 0xe2, /* F */ 190 0x7a, /* G */ 191 0xe8, /* H */ 192 0x08, /* I */ 193 0x3c, /* J */ 194 0xea, /* K */ 195 0x70, /* L */ 196 0x6e, /* M */ 197 0xa8, /* N */ 198 0xb8, /* O */ 199 0xe6, /* P */ 200 0xce, /* Q */ 201 0xa0, /* R */ 202 0xc8, /* S */ 203 0x8c, /* T */ 204 0x7c, /* U */ 205 0x54, /* V */ 206 0xfc, /* W */ 207 0xec, /* X */ 208 0xdc, /* Y */ 209 0xa4, /* Z */ 210 }; 211 212 static u8 char2ledval(char c) 213 { 214 if (isdigit(c)) 215 return ledval_num[c - '0']; 216 else if (isalpha(c)) 217 return ledval_alpha[toupper(c) - 'A']; 218 219 return 0; 220 } 221 222 void led_puts(const char *s) 223 { 224 int i; 225 u32 val = 0; 226 227 if (!s) 228 return; 229 230 for (i = 0; i < 4; i++) { 231 val <<= 8; 232 val |= char2ledval(*s); 233 if (*s != '\0') 234 s++; 235 } 236 237 writel(~val, LED_BASE); 238 } 239