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Commit | Line | Data |
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4a551709 | 1 | /* |
c935d3bd | 2 | * (C) Copyright 2000-2004 |
4a551709 WD |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
4 | * | |
1a459660 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
4a551709 WD |
6 | */ |
7 | ||
8 | ||
9 | #include <common.h> | |
10 | #include <nios.h> | |
11 | ||
6d0f6bcf | 12 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; |
4a551709 | 13 | |
4a551709 WD |
14 | /*--------------------------------------------------------------------*/ |
15 | void flash_print_info (flash_info_t * info) | |
16 | { | |
17 | int i, k; | |
18 | unsigned long size; | |
19 | int erased; | |
20 | volatile unsigned char *flash; | |
21 | ||
22 | printf (" Size: %ld KB in %d Sectors\n", | |
23 | info->size >> 10, info->sector_count); | |
24 | printf (" Sector Start Addresses:"); | |
25 | for (i = 0; i < info->sector_count; ++i) { | |
26 | ||
27 | /* Check if whole sector is erased */ | |
28 | if (i != (info->sector_count - 1)) | |
29 | size = info->start[i + 1] - info->start[i]; | |
30 | else | |
31 | size = info->start[0] + info->size - info->start[i]; | |
32 | erased = 1; | |
33 | flash = (volatile unsigned char *) info->start[i]; | |
34 | for (k = 0; k < size; k++) { | |
35 | if (*flash++ != 0xff) { | |
36 | erased = 0; | |
37 | break; | |
38 | } | |
39 | } | |
40 | ||
41 | /* Print the info */ | |
42 | if ((i % 5) == 0) | |
43 | printf ("\n "); | |
44 | printf (" %08lX%s%s", info->start[i], erased ? " E" : " ", | |
45 | info->protect[i] ? "RO " : " "); | |
46 | } | |
47 | printf ("\n"); | |
48 | } | |
49 | ||
50 | /*-------------------------------------------------------------------*/ | |
51 | ||
52 | ||
53 | int flash_erase (flash_info_t * info, int s_first, int s_last) | |
54 | { | |
6d0f6bcf JCPV |
55 | volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[0]); |
56 | volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2; | |
4a551709 | 57 | int prot, sect; |
4a551709 WD |
58 | unsigned oldpri; |
59 | ulong start; | |
60 | ||
61 | /* Some sanity checking */ | |
62 | if ((s_first < 0) || (s_first > s_last)) { | |
63 | printf ("- no sectors to erase\n"); | |
64 | return 1; | |
65 | } | |
66 | ||
67 | prot = 0; | |
68 | for (sect = s_first; sect <= s_last; ++sect) { | |
69 | if (info->protect[sect]) { | |
70 | prot++; | |
71 | } | |
72 | } | |
73 | if (prot) { | |
74 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
75 | prot); | |
76 | } else { | |
77 | printf ("\n"); | |
78 | } | |
79 | ||
ec4c544b WD |
80 | #ifdef DEBUG |
81 | for (sect = s_first; sect <= s_last; sect++) { | |
82 | printf("- Erase: Sect: %i @ 0x%08x\n", sect, info->start[sect]); | |
83 | } | |
84 | #endif | |
85 | ||
4a551709 WD |
86 | /* NOTE: disabling interrupts on Nios can be very bad since it |
87 | * also disables the LO_LIMIT exception. It's better here to | |
88 | * set the interrupt priority to 3 & restore it when we're done. | |
89 | */ | |
90 | oldpri = ipri (3); | |
91 | ||
92 | /* It's ok to erase multiple sectors provided we don't delay more | |
93 | * than 50 usec between cmds ... at which point the erase time-out | |
94 | * occurs. So don't go and put printf() calls in the loop ... it | |
95 | * won't be very helpful ;-) | |
96 | */ | |
97 | for (sect = s_first; sect <= s_last; sect++) { | |
98 | if (info->protect[sect] == 0) { /* not protected */ | |
6d0f6bcf | 99 | addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[sect]); |
4a551709 WD |
100 | *addr = 0xaa; |
101 | *addr = 0x55; | |
102 | *addr = 0x80; | |
103 | *addr = 0xaa; | |
104 | *addr = 0x55; | |
105 | *addr2 = 0x30; | |
ec4c544b WD |
106 | /* Now just wait for 0xff & provide some user |
107 | * feedback while we wait. Here we have to grant | |
108 | * timer interrupts. Otherwise get_timer() can't | |
109 | * work right. */ | |
110 | ipri(oldpri); | |
111 | start = get_timer (0); | |
112 | while (*addr2 != 0xff) { | |
113 | udelay (1000 * 1000); | |
114 | putc ('.'); | |
6d0f6bcf | 115 | if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
ec4c544b WD |
116 | printf ("timeout\n"); |
117 | return 1; | |
118 | } | |
4a551709 | 119 | } |
ec4c544b | 120 | oldpri = ipri (3); /* disallow non important irqs again */ |
4a551709 | 121 | } |
4a551709 WD |
122 | } |
123 | ||
ec4c544b WD |
124 | printf ("\n"); |
125 | ||
4a551709 WD |
126 | /* Restore interrupt priority */ |
127 | ipri (oldpri); | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | /*----------------------------------------------------------------------- | |
133 | * Copy memory to flash, returns: | |
134 | * 0 - OK | |
135 | * 1 - write timeout | |
136 | * 2 - Flash not erased | |
137 | */ | |
138 | ||
139 | int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) | |
140 | { | |
141 | ||
142 | vu_char *cmd = (vu_char *) info->start[0]; | |
143 | vu_char *dst = (vu_char *) addr; | |
144 | unsigned char b; | |
145 | unsigned oldpri; | |
146 | ulong start; | |
147 | ||
148 | while (cnt) { | |
149 | /* Check for sufficient erase */ | |
150 | b = *src; | |
151 | if ((*dst & b) != b) { | |
152 | printf ("%02x : %02x\n", *dst, b); | |
153 | return (2); | |
154 | } | |
155 | ||
156 | /* Disable interrupts other than window underflow | |
157 | * (interrupt priority 2) | |
158 | */ | |
159 | oldpri = ipri (3); | |
160 | *cmd = 0xaa; | |
161 | *cmd = 0x55; | |
162 | *cmd = 0xa0; | |
163 | *dst = b; | |
164 | ||
165 | /* Verify write */ | |
166 | start = get_timer (0); | |
167 | while (*dst != b) { | |
6d0f6bcf | 168 | if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
4a551709 WD |
169 | ipri (oldpri); |
170 | return 1; | |
171 | } | |
172 | } | |
173 | dst++; | |
174 | src++; | |
175 | cnt--; | |
176 | ipri (oldpri); | |
177 | } | |
178 | ||
179 | return (0); | |
180 | } |