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[u-boot] / arch / arm / mach-uniphier / micro-support-card.c
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 #include <mach/micro-support-card.h>
11
12 #define MICRO_SUPPORT_CARD_BASE         0x43f00000
13 #define SMC911X_BASE                    ((MICRO_SUPPORT_CARD_BASE) + 0x00000)
14 #define LED_BASE                        ((MICRO_SUPPORT_CARD_BASE) + 0x90000)
15 #define NS16550A_BASE                   ((MICRO_SUPPORT_CARD_BASE) + 0xb0000)
16 #define MICRO_SUPPORT_CARD_RESET        ((MICRO_SUPPORT_CARD_BASE) + 0xd0034)
17 #define MICRO_SUPPORT_CARD_REVISION     ((MICRO_SUPPORT_CARD_BASE) + 0xd00E0)
18
19 /*
20  * 0: reset deassert, 1: reset
21  *
22  * bit[0]: LAN, I2C, LED
23  * bit[1]: UART
24  */
25 void support_card_reset_deassert(void)
26 {
27         writel(0, MICRO_SUPPORT_CARD_RESET);
28 }
29
30 void support_card_reset(void)
31 {
32         writel(3, MICRO_SUPPORT_CARD_RESET);
33 }
34
35 static int support_card_show_revision(void)
36 {
37         u32 revision;
38
39         revision = readl(MICRO_SUPPORT_CARD_REVISION);
40         printf("(CPLD version %d.%d)\n", revision >> 4, revision & 0xf);
41         return 0;
42 }
43
44 int check_support_card(void)
45 {
46         printf("SC:    Micro Support Card ");
47         return support_card_show_revision();
48 }
49
50 void support_card_init(void)
51 {
52         /*
53          * After power on, we need to keep the LAN controller in reset state
54          * for a while. (200 usec)
55          * Fortunately, enough wait time is already inserted in pll_init()
56          * function. So we do not have to wait here.
57          */
58         support_card_reset_deassert();
59 }
60
61 #if defined(CONFIG_SMC911X)
62 #include <netdev.h>
63
64 int board_eth_init(bd_t *bis)
65 {
66         return smc911x_initialize(0, SMC911X_BASE);
67 }
68 #endif
69
70 #if !defined(CONFIG_SYS_NO_FLASH)
71
72 #include <mtd/cfi_flash.h>
73 #include <mach/sbc-regs.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 }