1 /*
2  * Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <linux/ctype.h>
9 #include <linux/io.h>
10 
11 #include "micro-support-card.h"
12 
13 #define MICRO_SUPPORT_CARD_BASE		0x43f00000
14 #define SMC911X_BASE			((MICRO_SUPPORT_CARD_BASE) + 0x00000)
15 #define LED_BASE			((MICRO_SUPPORT_CARD_BASE) + 0x90000)
16 #define NS16550A_BASE			((MICRO_SUPPORT_CARD_BASE) + 0xb0000)
17 #define MICRO_SUPPORT_CARD_RESET	((MICRO_SUPPORT_CARD_BASE) + 0xd0034)
18 #define MICRO_SUPPORT_CARD_REVISION	((MICRO_SUPPORT_CARD_BASE) + 0xd00E0)
19 
20 /*
21  * 0: reset deassert, 1: reset
22  *
23  * bit[0]: LAN, I2C, LED
24  * bit[1]: UART
25  */
26 void support_card_reset_deassert(void)
27 {
28 	writel(0, MICRO_SUPPORT_CARD_RESET);
29 }
30 
31 void support_card_reset(void)
32 {
33 	writel(3, MICRO_SUPPORT_CARD_RESET);
34 }
35 
36 static int support_card_show_revision(void)
37 {
38 	u32 revision;
39 
40 	revision = readl(MICRO_SUPPORT_CARD_REVISION);
41 	printf("(CPLD version %d.%d)\n", revision >> 4, revision & 0xf);
42 	return 0;
43 }
44 
45 int check_support_card(void)
46 {
47 	printf("SC:    Micro Support Card ");
48 	return support_card_show_revision();
49 }
50 
51 void support_card_init(void)
52 {
53 	/*
54 	 * After power on, we need to keep the LAN controller in reset state
55 	 * for a while. (200 usec)
56 	 * Fortunately, enough wait time is already inserted in pll_init()
57 	 * function. So we do not have to wait here.
58 	 */
59 	support_card_reset_deassert();
60 }
61 
62 #if defined(CONFIG_SMC911X)
63 #include <netdev.h>
64 
65 int board_eth_init(bd_t *bis)
66 {
67 	return smc911x_initialize(0, SMC911X_BASE);
68 }
69 #endif
70 
71 #if !defined(CONFIG_SYS_NO_FLASH)
72 
73 #include <mtd/cfi_flash.h>
74 
75 struct memory_bank {
76 	phys_addr_t base;
77 	unsigned long size;
78 };
79 
80 static int mem_is_flash(const struct memory_bank *mem)
81 {
82 	const int loop = 128;
83 	u32 *scratch_addr;
84 	u32 saved_value;
85 	int ret = 1;
86 	int i;
87 
88 	/* just in case, use the tail of the memory bank */
89 	scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop,
90 				   sizeof(u32) * loop, MAP_NOCACHE);
91 
92 	for (i = 0; i < loop; i++, scratch_addr++) {
93 		saved_value = readl(scratch_addr);
94 		writel(~saved_value, scratch_addr);
95 		if (readl(scratch_addr) != saved_value) {
96 			/* We assume no memory or SRAM here. */
97 			writel(saved_value, scratch_addr);
98 			ret = 0;
99 			break;
100 		}
101 	}
102 
103 	unmap_physmem(scratch_addr, MAP_NOCACHE);
104 
105 	return ret;
106 }
107 
108 /* {address, size} */
109 static const struct memory_bank memory_banks[] = {
110 	{0x42000000, 0x01f00000},
111 };
112 
113 static const struct memory_bank
114 *flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT];
115 
116 phys_addr_t cfi_flash_bank_addr(int i)
117 {
118 	return flash_banks_list[i]->base;
119 }
120 
121 unsigned long cfi_flash_bank_size(int i)
122 {
123 	return flash_banks_list[i]->size;
124 }
125 
126 static void detect_num_flash_banks(void)
127 {
128 	const struct memory_bank *memory_bank, *end;
129 
130 	cfi_flash_num_flash_banks = 0;
131 
132 	memory_bank = memory_banks;
133 	end = memory_bank + ARRAY_SIZE(memory_banks);
134 
135 	for (; memory_bank < end; memory_bank++) {
136 		if (cfi_flash_num_flash_banks >=
137 		    CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
138 			break;
139 
140 		if (mem_is_flash(memory_bank)) {
141 			flash_banks_list[cfi_flash_num_flash_banks] =
142 								memory_bank;
143 
144 			debug("flash bank found: base = 0x%lx, size = 0x%lx\n",
145 			      memory_bank->base, memory_bank->size);
146 			cfi_flash_num_flash_banks++;
147 		}
148 	}
149 
150 	debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
151 }
152 #else /* CONFIG_SYS_NO_FLASH */
153 void detect_num_flash_banks(void)
154 {
155 };
156 #endif /* CONFIG_SYS_NO_FLASH */
157 
158 void support_card_late_init(void)
159 {
160 	detect_num_flash_banks();
161 }
162 
163 static const u8 ledval_num[] = {
164 	0x7e, /* 0 */
165 	0x0c, /* 1 */
166 	0xb6, /* 2 */
167 	0x9e, /* 3 */
168 	0xcc, /* 4 */
169 	0xda, /* 5 */
170 	0xfa, /* 6 */
171 	0x4e, /* 7 */
172 	0xfe, /* 8 */
173 	0xde, /* 9 */
174 };
175 
176 static const u8 ledval_alpha[] = {
177 	0xee, /* A */
178 	0xf8, /* B */
179 	0x72, /* C */
180 	0xbc, /* D */
181 	0xf2, /* E */
182 	0xe2, /* F */
183 	0x7a, /* G */
184 	0xe8, /* H */
185 	0x08, /* I */
186 	0x3c, /* J */
187 	0xea, /* K */
188 	0x70, /* L */
189 	0x6e, /* M */
190 	0xa8, /* N */
191 	0xb8, /* O */
192 	0xe6, /* P */
193 	0xce, /* Q */
194 	0xa0, /* R */
195 	0xc8, /* S */
196 	0x8c, /* T */
197 	0x7c, /* U */
198 	0x54, /* V */
199 	0xfc, /* W */
200 	0xec, /* X */
201 	0xdc, /* Y */
202 	0xa4, /* Z */
203 };
204 
205 static u8 char2ledval(char c)
206 {
207 	if (isdigit(c))
208 		return ledval_num[c - '0'];
209 	else if (isalpha(c))
210 		return ledval_alpha[toupper(c) - 'A'];
211 
212 	return 0;
213 }
214 
215 void led_puts(const char *s)
216 {
217 	int i;
218 	u32 val = 0;
219 
220 	if (!s)
221 		return;
222 
223 	for (i = 0; i < 4; i++) {
224 		val <<= 8;
225 		val |= char2ledval(*s);
226 		if (*s != '\0')
227 			s++;
228 	}
229 
230 	writel(~val, LED_BASE);
231 }
232