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9cc83378 SM |
1 | /* |
2 | * (C) Copyright 2000-2004 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | ||
25 | #include <common.h> | |
26 | #if defined(CONFIG_NIOS) | |
27 | #include <nios.h> | |
28 | #else | |
29 | #include <asm/io.h> | |
30 | #endif | |
31 | ||
32 | #define SECTSZ (64 * 1024) | |
6d0f6bcf | 33 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; |
9cc83378 SM |
34 | |
35 | /*----------------------------------------------------------------------*/ | |
36 | unsigned long flash_init (void) | |
37 | { | |
38 | int i; | |
39 | unsigned long addr; | |
40 | flash_info_t *fli = &flash_info[0]; | |
41 | ||
6d0f6bcf JCPV |
42 | fli->size = CONFIG_SYS_FLASH_SIZE; |
43 | fli->sector_count = CONFIG_SYS_MAX_FLASH_SECT; | |
9cc83378 SM |
44 | fli->flash_id = FLASH_MAN_AMD + FLASH_AMDLV065D; |
45 | ||
6d0f6bcf | 46 | addr = CONFIG_SYS_FLASH_BASE; |
9cc83378 SM |
47 | for (i = 0; i < fli->sector_count; ++i) { |
48 | fli->start[i] = addr; | |
49 | addr += SECTSZ; | |
50 | fli->protect[i] = 1; | |
51 | } | |
52 | ||
6d0f6bcf | 53 | return (CONFIG_SYS_FLASH_SIZE); |
9cc83378 SM |
54 | } |
55 | /*--------------------------------------------------------------------*/ | |
56 | void flash_print_info (flash_info_t * info) | |
57 | { | |
58 | int i, k; | |
59 | int erased; | |
60 | unsigned long *addr; | |
61 | ||
62 | printf (" Size: %ld KB in %d Sectors\n", | |
63 | info->size >> 10, info->sector_count); | |
64 | printf (" Sector Start Addresses:"); | |
65 | for (i = 0; i < info->sector_count; ++i) { | |
66 | ||
67 | /* Check if whole sector is erased */ | |
68 | erased = 1; | |
69 | addr = (unsigned long *) info->start[i]; | |
70 | for (k = 0; k < SECTSZ/sizeof(unsigned long); k++) { | |
71 | if ( readl(addr++) != (unsigned long)-1) { | |
72 | erased = 0; | |
73 | break; | |
74 | } | |
75 | } | |
76 | ||
77 | /* Print the info */ | |
78 | if ((i % 5) == 0) | |
79 | printf ("\n "); | |
80 | printf (" %08lX%s%s", | |
81 | info->start[i], | |
82 | erased ? " E" : " ", | |
83 | info->protect[i] ? "RO " : " "); | |
84 | } | |
85 | printf ("\n"); | |
86 | } | |
87 | ||
88 | /*-------------------------------------------------------------------*/ | |
89 | ||
90 | ||
91 | int flash_erase (flash_info_t * info, int s_first, int s_last) | |
92 | { | |
93 | unsigned char *addr = (unsigned char *) info->start[0]; | |
94 | unsigned char *addr2; | |
95 | int prot, sect; | |
96 | ulong start; | |
97 | ||
98 | /* Some sanity checking */ | |
99 | if ((s_first < 0) || (s_first > s_last)) { | |
100 | printf ("- no sectors to erase\n"); | |
101 | return 1; | |
102 | } | |
103 | ||
104 | prot = 0; | |
105 | for (sect = s_first; sect <= s_last; ++sect) { | |
106 | if (info->protect[sect]) { | |
107 | prot++; | |
108 | } | |
109 | } | |
110 | if (prot) { | |
111 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
112 | prot); | |
113 | } else { | |
114 | printf ("\n"); | |
115 | } | |
116 | ||
117 | /* It's ok to erase multiple sectors provided we don't delay more | |
118 | * than 50 usec between cmds ... at which point the erase time-out | |
119 | * occurs. So don't go and put printf() calls in the loop ... it | |
120 | * won't be very helpful ;-) | |
121 | */ | |
122 | for (sect = s_first; sect <= s_last; sect++) { | |
123 | if (info->protect[sect] == 0) { /* not protected */ | |
124 | addr2 = (unsigned char *) info->start[sect]; | |
125 | writeb (addr, 0xaa); | |
126 | writeb (addr, 0x55); | |
127 | writeb (addr, 0x80); | |
128 | writeb (addr, 0xaa); | |
129 | writeb (addr, 0x55); | |
130 | writeb (addr2, 0x30); | |
131 | /* Now just wait for 0xff & provide some user | |
132 | * feedback while we wait. | |
133 | */ | |
134 | start = get_timer (0); | |
135 | while ( readb (addr2) != 0xff) { | |
136 | udelay (1000 * 1000); | |
137 | putc ('.'); | |
6d0f6bcf | 138 | if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
9cc83378 SM |
139 | printf ("timeout\n"); |
140 | return 1; | |
141 | } | |
142 | } | |
143 | } | |
144 | } | |
145 | printf ("\n"); | |
146 | return 0; | |
147 | } | |
148 | ||
149 | /*----------------------------------------------------------------------- | |
150 | * Copy memory to flash, returns: | |
151 | * 0 - OK | |
152 | * 1 - write timeout | |
153 | * 2 - Flash not erased | |
154 | */ | |
155 | ||
156 | int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) | |
157 | { | |
158 | ||
159 | vu_char *cmd = (vu_char *) info->start[0]; | |
160 | vu_char *dst = (vu_char *) addr; | |
161 | unsigned char b; | |
162 | ulong start; | |
163 | ||
164 | while (cnt) { | |
165 | /* Check for sufficient erase */ | |
166 | b = *src; | |
167 | if ((readb (dst) & b) != b) { | |
168 | printf ("%02x : %02x\n", readb (dst), b); | |
169 | return (2); | |
170 | } | |
171 | ||
172 | writeb (cmd, 0xaa); | |
173 | writeb (cmd, 0x55); | |
174 | writeb (cmd, 0xa0); | |
175 | writeb (dst, b); | |
176 | ||
177 | /* Verify write */ | |
178 | start = get_timer (0); | |
179 | while (readb (dst) != b) { | |
6d0f6bcf | 180 | if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
9cc83378 SM |
181 | return 1; |
182 | } | |
183 | } | |
184 | dst++; | |
185 | src++; | |
186 | cnt--; | |
187 | } | |
188 | ||
189 | return (0); | |
190 | } |