2 * Copyright (C) 2012-2015 Panasonic Corporation
3 * Copyright (C) 2015-2016 Socionext Inc.
4 * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
6 * SPDX-License-Identifier: GPL-2.0+
10 #include <linux/ctype.h>
13 #include "micro-support-card.h"
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)
23 * 0: reset deassert, 1: reset
25 * bit[0]: LAN, I2C, LED
28 static void support_card_reset_deassert(void)
30 writel(0x00010000, MICRO_SUPPORT_CARD_RESET);
33 static void support_card_reset(void)
35 writel(0x00020003, MICRO_SUPPORT_CARD_RESET);
38 static int support_card_show_revision(void)
42 revision = readl(MICRO_SUPPORT_CARD_REVISION);
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);
53 void support_card_init(void)
57 * After power on, we need to keep the LAN controller in reset state
58 * for a while. (200 usec)
61 support_card_reset_deassert();
63 support_card_show_revision();
66 #if defined(CONFIG_SMC911X)
69 int board_eth_init(bd_t *bis)
71 return smc911x_initialize(0, SMC911X_BASE);
75 #if defined(CONFIG_MTD_NOR_FLASH)
77 #include <mtd/cfi_flash.h>
84 static int mem_is_flash(const struct memory_bank *mem)
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);
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);
107 unmap_physmem(scratch_addr, MAP_NOCACHE);
112 /* {address, size} */
113 static const struct memory_bank memory_banks[] = {
114 {0x42000000, 0x01f00000},
117 static const struct memory_bank
118 *flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT];
120 phys_addr_t cfi_flash_bank_addr(int i)
122 return flash_banks_list[i]->base;
125 unsigned long cfi_flash_bank_size(int i)
127 return flash_banks_list[i]->size;
130 static void detect_num_flash_banks(void)
132 const struct memory_bank *memory_bank, *end;
134 cfi_flash_num_flash_banks = 0;
136 memory_bank = memory_banks;
137 end = memory_bank + ARRAY_SIZE(memory_banks);
139 for (; memory_bank < end; memory_bank++) {
140 if (cfi_flash_num_flash_banks >=
141 CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
144 if (mem_is_flash(memory_bank)) {
145 flash_banks_list[cfi_flash_num_flash_banks] =
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++;
155 debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
157 #else /* CONFIG_MTD_NOR_FLASH */
158 static void detect_num_flash_banks(void)
161 #endif /* CONFIG_MTD_NOR_FLASH */
163 void support_card_late_init(void)
165 detect_num_flash_banks();
168 static const u8 ledval_num[] = {
181 static const u8 ledval_alpha[] = {
210 static u8 char2ledval(char c)
213 return ledval_num[c - '0'];
215 return ledval_alpha[toupper(c) - 'A'];
220 void led_puts(const char *s)
228 for (i = 0; i < 4; i++) {
230 val |= char2ledval(*s);
235 writel(~val, LED_BASE);