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a9533e7e HP |
1 | /* |
2 | * Copyright (c) 2010 Broadcom Corporation | |
3 | * | |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | |
11 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION | |
13 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN | |
14 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include <typedefs.h> | |
18 | #include <bcmdefs.h> | |
3327989a | 19 | #include <linux/string.h> |
a9533e7e HP |
20 | #include <osl.h> |
21 | #include <bcmutils.h> | |
22 | #include <siutils.h> | |
23 | #include <bcmendian.h> | |
24 | #include <bcmnvram.h> | |
25 | #include <sbchipc.h> | |
26 | #include <bcmsrom.h> | |
27 | #include <bcmotp.h> | |
28 | #include <bcmdevs.h> | |
29 | #include <hndsoc.h> | |
30 | ||
31 | #define NVR_MSG(x) | |
32 | ||
33 | typedef struct _vars { | |
34 | struct _vars *next; | |
35 | int bufsz; /* allocated size */ | |
36 | int size; /* actual vars size */ | |
37 | char *vars; | |
38 | } vars_t; | |
39 | ||
40 | #define VARS_T_OH sizeof(vars_t) | |
41 | ||
7e85c729 | 42 | static vars_t *vars; |
a9533e7e HP |
43 | |
44 | #define NVRAM_FILE 1 | |
45 | ||
46 | static char *findvar(char *vars, char *lim, const char *name); | |
47 | ||
48 | #if defined(FLASH) | |
49 | /* copy flash to ram */ | |
a2627bc0 JC |
50 | static void BCMINITFN(get_flash_nvram) (si_t *sih, struct nvram_header *nvh) |
51 | { | |
a9533e7e HP |
52 | osl_t *osh; |
53 | uint nvs, bufsz; | |
54 | vars_t *new; | |
55 | ||
56 | osh = si_osh(sih); | |
57 | ||
58 | nvs = R_REG(osh, &nvh->len) - sizeof(struct nvram_header); | |
59 | bufsz = nvs + VARS_T_OH; | |
60 | ||
ca8c1e59 JC |
61 | new = (vars_t *) MALLOC(osh, bufsz); |
62 | if (new == NULL) { | |
a9533e7e HP |
63 | NVR_MSG(("Out of memory for flash vars\n")); |
64 | return; | |
65 | } | |
66 | new->vars = (char *)new + VARS_T_OH; | |
67 | ||
68 | new->bufsz = bufsz; | |
69 | new->size = nvs; | |
70 | new->next = vars; | |
71 | vars = new; | |
72 | ||
73 | bcopy((char *)(&nvh[1]), new->vars, nvs); | |
74 | ||
75 | NVR_MSG(("%s: flash nvram @ %p, copied %d bytes to %p\n", __func__, | |
76 | nvh, nvs, new->vars)); | |
77 | } | |
78 | #endif /* FLASH */ | |
79 | ||
0d2f0724 | 80 | int nvram_init(void *si) |
a2627bc0 | 81 | { |
a9533e7e HP |
82 | |
83 | /* Make sure we read nvram in flash just once before freeing the memory */ | |
84 | if (vars != NULL) { | |
85 | NVR_MSG(("nvram_init: called again without calling nvram_exit()\n")); | |
86 | return 0; | |
87 | } | |
88 | return 0; | |
89 | } | |
90 | ||
0d2f0724 | 91 | int nvram_append(void *si, char *varlst, uint varsz) |
a2627bc0 | 92 | { |
a9533e7e HP |
93 | uint bufsz = VARS_T_OH; |
94 | vars_t *new; | |
95 | ||
ca8c1e59 JC |
96 | new = MALLOC(si_osh((si_t *) si), bufsz); |
97 | if (new == NULL) | |
a9533e7e HP |
98 | return BCME_NOMEM; |
99 | ||
100 | new->vars = varlst; | |
101 | new->bufsz = bufsz; | |
102 | new->size = varsz; | |
103 | new->next = vars; | |
104 | vars = new; | |
105 | ||
106 | return BCME_OK; | |
107 | } | |
108 | ||
a2627bc0 JC |
109 | void BCMUNINITFN(nvram_exit) (void *si) |
110 | { | |
a9533e7e HP |
111 | vars_t *this, *next; |
112 | si_t *sih; | |
113 | ||
114 | sih = (si_t *) si; | |
115 | this = vars; | |
116 | ||
117 | if (this) | |
118 | MFREE(si_osh(sih), this->vars, this->size); | |
119 | ||
120 | while (this) { | |
121 | next = this->next; | |
122 | MFREE(si_osh(sih), this, this->bufsz); | |
123 | this = next; | |
124 | } | |
125 | vars = NULL; | |
126 | } | |
127 | ||
128 | static char *findvar(char *vars, char *lim, const char *name) | |
129 | { | |
130 | char *s; | |
131 | int len; | |
132 | ||
133 | len = strlen(name); | |
134 | ||
135 | for (s = vars; (s < lim) && *s;) { | |
136 | if ((bcmp(s, name, len) == 0) && (s[len] == '=')) | |
90ea2296 | 137 | return &s[len + 1]; |
a9533e7e | 138 | |
62145822 JC |
139 | while (*s++) |
140 | ; | |
a9533e7e HP |
141 | } |
142 | ||
143 | return NULL; | |
144 | } | |
145 | ||
146 | char *nvram_get(const char *name) | |
147 | { | |
148 | char *v = NULL; | |
149 | vars_t *cur; | |
150 | ||
ca8c1e59 JC |
151 | for (cur = vars; cur; cur = cur->next) { |
152 | v = findvar(cur->vars, cur->vars + cur->size, name); | |
153 | if (v) | |
a9533e7e | 154 | break; |
ca8c1e59 | 155 | } |
a9533e7e HP |
156 | |
157 | return v; | |
158 | } | |
159 | ||
0d2f0724 | 160 | int nvram_set(const char *name, const char *value) |
a2627bc0 | 161 | { |
a9533e7e HP |
162 | return 0; |
163 | } | |
164 | ||
0d2f0724 | 165 | int nvram_unset(const char *name) |
a2627bc0 | 166 | { |
a9533e7e HP |
167 | return 0; |
168 | } | |
169 | ||
0d2f0724 | 170 | int nvram_reset(void *si) |
a2627bc0 | 171 | { |
a9533e7e HP |
172 | return 0; |
173 | } | |
174 | ||
0d2f0724 | 175 | int nvram_commit(void) |
a2627bc0 | 176 | { |
a9533e7e HP |
177 | return 0; |
178 | } | |
179 | ||
180 | int nvram_getall(char *buf, int count) | |
181 | { | |
182 | int len, resid = count; | |
183 | vars_t *this; | |
184 | ||
185 | this = vars; | |
186 | while (this) { | |
187 | char *from, *lim, *to; | |
188 | int acc; | |
189 | ||
190 | from = this->vars; | |
c03b63c1 | 191 | lim = (char *)(this->vars + this->size); |
a9533e7e HP |
192 | to = buf; |
193 | acc = 0; | |
194 | while ((from < lim) && (*from)) { | |
195 | len = strlen(from) + 1; | |
196 | if (resid < (acc + len)) | |
197 | return BCME_BUFTOOSHORT; | |
198 | bcopy(from, to, len); | |
199 | acc += len; | |
200 | from += len; | |
201 | to += len; | |
202 | } | |
203 | ||
204 | resid -= acc; | |
205 | buf += acc; | |
206 | this = this->next; | |
207 | } | |
208 | if (resid < 1) | |
209 | return BCME_BUFTOOSHORT; | |
210 | *buf = '\0'; | |
211 | return 0; | |
212 | } |