1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2012-2015 Panasonic Corporation
4 * Copyright (C) 2015-2020 Socionext Inc.
5 * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
9 #include <fdt_support.h>
12 #include <linux/ctype.h>
15 #include "micro-support-card.h"
17 #define SMC911X_OFFSET 0x00000
18 #define LED_OFFSET 0x90000
19 #define NS16550A_OFFSET 0xb0000
20 #define MICRO_SUPPORT_CARD_RESET 0xd0034
21 #define MICRO_SUPPORT_CARD_REVISION 0xd00e0
23 static bool support_card_found;
24 static void __iomem *support_card_base;
26 static void support_card_detect(void)
28 DECLARE_GLOBAL_DATA_PTR;
29 const void *fdt = gd->fdt_blob;
33 offset = fdt_node_offset_by_compatible(fdt, 0, "smsc,lan9118");
37 addr = fdt_get_base_address(fdt, offset);
38 if (addr == OF_BAD_ADDR)
40 addr -= SMC911X_OFFSET;
42 offset = fdt_node_offset_by_compatible(fdt, 0, "ns16550a");
46 addr2 = fdt_get_base_address(fdt, offset);
47 if (addr2 == OF_BAD_ADDR)
49 addr2 -= NS16550A_OFFSET;
55 support_card_base = ioremap(addr, 0x100000);
57 support_card_found = true;
61 * 0: reset deassert, 1: reset
63 * bit[0]: LAN, I2C, LED
66 static void support_card_reset_deassert(void)
68 writel(0x00010000, support_card_base + MICRO_SUPPORT_CARD_RESET);
71 static void support_card_reset(void)
73 writel(0x00020003, support_card_base + MICRO_SUPPORT_CARD_RESET);
76 static int support_card_show_revision(void)
80 revision = readl(support_card_base + MICRO_SUPPORT_CARD_REVISION);
83 /* revision 3.6.x card changed the revision format */
84 printf("SC: Micro Support Card (CPLD version %s%d.%d)\n",
85 revision >> 4 == 6 ? "3." : "",
86 revision >> 4, revision & 0xf);
91 void support_card_init(void)
93 support_card_detect();
95 if (!support_card_found)
100 * After power on, we need to keep the LAN controller in reset state
101 * for a while. (200 usec)
104 support_card_reset_deassert();
106 support_card_show_revision();
109 #if defined(CONFIG_SMC911X)
112 int board_eth_init(bd_t *bis)
114 if (!support_card_found)
117 return smc911x_initialize(0, (unsigned long)support_card_base + SMC911X_OFFSET);
121 #if defined(CONFIG_MTD_NOR_FLASH)
123 #include <mtd/cfi_flash.h>
130 static int mem_is_flash(const struct memory_bank *mem)
132 const int loop = 128;
138 /* just in case, use the tail of the memory bank */
139 scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop,
140 sizeof(u32) * loop, MAP_NOCACHE);
142 for (i = 0; i < loop; i++, scratch_addr++) {
143 saved_value = readl(scratch_addr);
144 writel(~saved_value, scratch_addr);
145 if (readl(scratch_addr) != saved_value) {
146 /* We assume no memory or SRAM here. */
147 writel(saved_value, scratch_addr);
153 unmap_physmem(scratch_addr, MAP_NOCACHE);
158 /* {address, size} */
159 static const struct memory_bank memory_banks[] = {
160 {0x42000000, 0x01f00000},
163 static const struct memory_bank
164 *flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT];
166 phys_addr_t cfi_flash_bank_addr(int i)
168 return flash_banks_list[i]->base;
171 unsigned long cfi_flash_bank_size(int i)
173 return flash_banks_list[i]->size;
176 static void detect_num_flash_banks(void)
178 const struct memory_bank *memory_bank, *end;
180 cfi_flash_num_flash_banks = 0;
182 memory_bank = memory_banks;
183 end = memory_bank + ARRAY_SIZE(memory_banks);
185 for (; memory_bank < end; memory_bank++) {
186 if (cfi_flash_num_flash_banks >=
187 CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
190 if (mem_is_flash(memory_bank)) {
191 flash_banks_list[cfi_flash_num_flash_banks] =
194 debug("flash bank found: base = 0x%lx, size = 0x%lx\n",
195 (unsigned long)memory_bank->base,
196 (unsigned long)memory_bank->size);
197 cfi_flash_num_flash_banks++;
201 debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
203 #else /* CONFIG_MTD_NOR_FLASH */
204 static void detect_num_flash_banks(void)
207 #endif /* CONFIG_MTD_NOR_FLASH */
209 void support_card_late_init(void)
211 if (!support_card_found)
214 detect_num_flash_banks();
217 static const u8 ledval_num[] = {
230 static const u8 ledval_alpha[] = {
259 static u8 char2ledval(char c)
262 return ledval_num[c - '0'];
264 return ledval_alpha[toupper(c) - 'A'];
269 void led_puts(const char *s)
274 if (!support_card_found)
280 for (i = 0; i < 4; i++) {
282 val |= char2ledval(*s);
287 writel(~val, support_card_base + LED_OFFSET);