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>
13 #include <linux/ctype.h>
14 #include <linux/delay.h>
17 #include "micro-support-card.h"
19 #define SMC911X_OFFSET 0x00000
20 #define LED_OFFSET 0x90000
21 #define NS16550A_OFFSET 0xb0000
22 #define MICRO_SUPPORT_CARD_RESET 0xd0034
23 #define MICRO_SUPPORT_CARD_REVISION 0xd00e0
25 static bool support_card_found;
26 static void __iomem *support_card_base;
28 static void support_card_detect(void)
30 DECLARE_GLOBAL_DATA_PTR;
31 const void *fdt = gd->fdt_blob;
35 offset = fdt_node_offset_by_compatible(fdt, 0, "smsc,lan9118");
39 addr = fdt_get_base_address(fdt, offset);
40 if (addr == OF_BAD_ADDR)
42 addr -= SMC911X_OFFSET;
44 offset = fdt_node_offset_by_compatible(fdt, 0, "ns16550a");
48 addr2 = fdt_get_base_address(fdt, offset);
49 if (addr2 == OF_BAD_ADDR)
51 addr2 -= NS16550A_OFFSET;
57 support_card_base = ioremap(addr, 0x100000);
59 support_card_found = true;
63 * 0: reset deassert, 1: reset
65 * bit[0]: LAN, I2C, LED
68 static void support_card_reset_deassert(void)
70 writel(0x00010000, support_card_base + MICRO_SUPPORT_CARD_RESET);
73 static void support_card_reset(void)
75 writel(0x00020003, support_card_base + MICRO_SUPPORT_CARD_RESET);
78 static int support_card_show_revision(void)
82 revision = readl(support_card_base + MICRO_SUPPORT_CARD_REVISION);
85 /* revision 3.6.x card changed the revision format */
86 printf("SC: Micro Support Card (CPLD version %s%d.%d)\n",
87 revision >> 4 == 6 ? "3." : "",
88 revision >> 4, revision & 0xf);
93 void support_card_init(void)
95 support_card_detect();
97 if (!support_card_found)
100 support_card_reset();
102 * After power on, we need to keep the LAN controller in reset state
103 * for a while. (200 usec)
106 support_card_reset_deassert();
108 support_card_show_revision();
111 #if defined(CONFIG_SMC911X)
114 int board_eth_init(bd_t *bis)
116 if (!support_card_found)
119 return smc911x_initialize(0, (unsigned long)support_card_base + SMC911X_OFFSET);
123 #if defined(CONFIG_MTD_NOR_FLASH)
125 #include <mtd/cfi_flash.h>
132 static int mem_is_flash(const struct memory_bank *mem)
134 const int loop = 128;
140 /* just in case, use the tail of the memory bank */
141 scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop,
142 sizeof(u32) * loop, MAP_NOCACHE);
144 for (i = 0; i < loop; i++, scratch_addr++) {
145 saved_value = readl(scratch_addr);
146 writel(~saved_value, scratch_addr);
147 if (readl(scratch_addr) != saved_value) {
148 /* We assume no memory or SRAM here. */
149 writel(saved_value, scratch_addr);
155 unmap_physmem(scratch_addr, MAP_NOCACHE);
160 /* {address, size} */
161 static const struct memory_bank memory_banks[] = {
162 {0x42000000, 0x01f00000},
165 static const struct memory_bank
166 *flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT];
168 phys_addr_t cfi_flash_bank_addr(int i)
170 return flash_banks_list[i]->base;
173 unsigned long cfi_flash_bank_size(int i)
175 return flash_banks_list[i]->size;
178 static void detect_num_flash_banks(void)
180 const struct memory_bank *memory_bank, *end;
182 cfi_flash_num_flash_banks = 0;
184 memory_bank = memory_banks;
185 end = memory_bank + ARRAY_SIZE(memory_banks);
187 for (; memory_bank < end; memory_bank++) {
188 if (cfi_flash_num_flash_banks >=
189 CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
192 if (mem_is_flash(memory_bank)) {
193 flash_banks_list[cfi_flash_num_flash_banks] =
196 debug("flash bank found: base = 0x%lx, size = 0x%lx\n",
197 (unsigned long)memory_bank->base,
198 (unsigned long)memory_bank->size);
199 cfi_flash_num_flash_banks++;
203 debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
205 #else /* CONFIG_MTD_NOR_FLASH */
206 static void detect_num_flash_banks(void)
209 #endif /* CONFIG_MTD_NOR_FLASH */
211 void support_card_late_init(void)
213 if (!support_card_found)
216 detect_num_flash_banks();
219 static const u8 ledval_num[] = {
232 static const u8 ledval_alpha[] = {
261 static u8 char2ledval(char c)
264 return ledval_num[c - '0'];
266 return ledval_alpha[toupper(c) - 'A'];
271 void led_puts(const char *s)
276 if (!support_card_found)
282 for (i = 0; i < 4; i++) {
284 val |= char2ledval(*s);
289 writel(~val, support_card_base + LED_OFFSET);