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1 /*
2  * (C) Copyright 2000-2004
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8
9 #include <common.h>
10 #if defined(CONFIG_NIOS)
11 #include <nios.h>
12 #else
13 #include <asm/io.h>
14 #endif
15
16 #define SECTSZ          (64 * 1024)
17 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
18
19 /*----------------------------------------------------------------------*/
20 unsigned long flash_init (void)
21 {
22         int i;
23         unsigned long addr;
24         flash_info_t *fli = &flash_info[0];
25
26         fli->size = CONFIG_SYS_FLASH_SIZE;
27         fli->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
28         fli->flash_id = FLASH_MAN_AMD + FLASH_AMDLV065D;
29
30         addr = CONFIG_SYS_FLASH_BASE;
31         for (i = 0; i < fli->sector_count; ++i) {
32                 fli->start[i] = addr;
33                 addr += SECTSZ;
34                 fli->protect[i] = 1;
35         }
36
37         return (CONFIG_SYS_FLASH_SIZE);
38 }
39 /*--------------------------------------------------------------------*/
40 void flash_print_info (flash_info_t * info)
41 {
42         int i, k;
43         int erased;
44         unsigned long *addr;
45
46         printf ("  Size: %ld KB in %d Sectors\n",
47                 info->size >> 10, info->sector_count);
48         printf ("  Sector Start Addresses:");
49         for (i = 0; i < info->sector_count; ++i) {
50
51                 /* Check if whole sector is erased */
52                 erased = 1;
53                 addr = (unsigned long *) info->start[i];
54                 for (k = 0; k < SECTSZ/sizeof(unsigned long); k++) {
55                         if ( readl(addr++) != (unsigned long)-1) {
56                                 erased = 0;
57                                 break;
58                         }
59                 }
60
61                 /* Print the info */
62                 if ((i % 5) == 0)
63                         printf ("\n   ");
64                 printf (" %08lX%s%s",
65                         info->start[i],
66                         erased ? " E" : "  ",
67                         info->protect[i] ? "RO " : "   ");
68         }
69         printf ("\n");
70 }
71
72 /*-------------------------------------------------------------------*/
73
74
75 int flash_erase (flash_info_t * info, int s_first, int s_last)
76 {
77         unsigned char *addr = (unsigned char *) info->start[0];
78         unsigned char *addr2;
79         int prot, sect;
80         ulong start;
81
82         /* Some sanity checking */
83         if ((s_first < 0) || (s_first > s_last)) {
84                 printf ("- no sectors to erase\n");
85                 return 1;
86         }
87
88         prot = 0;
89         for (sect = s_first; sect <= s_last; ++sect) {
90                 if (info->protect[sect]) {
91                         prot++;
92                 }
93         }
94         if (prot) {
95                 printf ("- Warning: %d protected sectors will not be erased!\n",
96                         prot);
97         } else {
98                 printf ("\n");
99         }
100
101         /* It's ok to erase multiple sectors provided we don't delay more
102          * than 50 usec between cmds ... at which point the erase time-out
103          * occurs. So don't go and put printf() calls in the loop ... it
104          * won't be very helpful ;-)
105          */
106         for (sect = s_first; sect <= s_last; sect++) {
107                 if (info->protect[sect] == 0) { /* not protected */
108                         addr2 = (unsigned char *) info->start[sect];
109                         writeb (0xaa, addr);
110                         writeb (0x55, addr);
111                         writeb (0x80, addr);
112                         writeb (0xaa, addr);
113                         writeb (0x55, addr);
114                         writeb (0x30, addr2);
115                         /* Now just wait for 0xff & provide some user
116                          * feedback while we wait.
117                          */
118                         start = get_timer (0);
119                         while ( readb (addr2) != 0xff) {
120                                 udelay (1000 * 1000);
121                                 putc ('.');
122                                 if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
123                                         printf ("timeout\n");
124                                         return 1;
125                                 }
126                         }
127                 }
128         }
129         printf ("\n");
130         return 0;
131 }
132
133 /*-----------------------------------------------------------------------
134  * Copy memory to flash, returns:
135  * 0 - OK
136  * 1 - write timeout
137  * 2 - Flash not erased
138  */
139
140 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
141 {
142
143         vu_char *cmd = (vu_char *) info->start[0];
144         vu_char *dst = (vu_char *) addr;
145         unsigned char b;
146         ulong start;
147
148         while (cnt) {
149                 /* Check for sufficient erase */
150                 b = *src;
151                 if ((readb (dst) & b) != b) {
152                         printf ("%02x : %02x\n", readb (dst), b);
153                         return (2);
154                 }
155
156                 writeb (0xaa, cmd);
157                 writeb (0x55, cmd);
158                 writeb (0xa0, cmd);
159                 writeb (dst, b);
160
161                 /* Verify write */
162                 start = get_timer (0);
163                 while (readb (dst) != b) {
164                         if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
165                                 return 1;
166                         }
167                 }
168                 dst++;
169                 src++;
170                 cnt--;
171         }
172
173         return (0);
174 }