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72a525cb RM |
1 | /* |
2 | * Sonics Silicon Backplane | |
3 | * ChipCommon serial flash interface | |
4 | * | |
5 | * Licensed under the GNU/GPL. See COPYING for details. | |
6 | */ | |
7 | ||
8 | #include <linux/ssb/ssb.h> | |
9 | ||
10 | #include "ssb_private.h" | |
11 | ||
59015278 RM |
12 | struct ssb_sflash_tbl_e { |
13 | char *name; | |
14 | u32 id; | |
15 | u32 blocksize; | |
16 | u16 numblocks; | |
17 | }; | |
18 | ||
19 | static struct ssb_sflash_tbl_e ssb_sflash_st_tbl[] = { | |
20 | { "M25P20", 0x11, 0x10000, 4, }, | |
21 | { "M25P40", 0x12, 0x10000, 8, }, | |
22 | ||
23 | { "M25P16", 0x14, 0x10000, 32, }, | |
24 | { "M25P32", 0x15, 0x10000, 64, }, | |
25 | { "M25P64", 0x16, 0x10000, 128, }, | |
26 | { "M25FL128", 0x17, 0x10000, 256, }, | |
27 | { 0 }, | |
28 | }; | |
29 | ||
30 | static struct ssb_sflash_tbl_e ssb_sflash_sst_tbl[] = { | |
31 | { "SST25WF512", 1, 0x1000, 16, }, | |
32 | { "SST25VF512", 0x48, 0x1000, 16, }, | |
33 | { "SST25WF010", 2, 0x1000, 32, }, | |
34 | { "SST25VF010", 0x49, 0x1000, 32, }, | |
35 | { "SST25WF020", 3, 0x1000, 64, }, | |
36 | { "SST25VF020", 0x43, 0x1000, 64, }, | |
37 | { "SST25WF040", 4, 0x1000, 128, }, | |
38 | { "SST25VF040", 0x44, 0x1000, 128, }, | |
39 | { "SST25VF040B", 0x8d, 0x1000, 128, }, | |
40 | { "SST25WF080", 5, 0x1000, 256, }, | |
41 | { "SST25VF080B", 0x8e, 0x1000, 256, }, | |
42 | { "SST25VF016", 0x41, 0x1000, 512, }, | |
43 | { "SST25VF032", 0x4a, 0x1000, 1024, }, | |
44 | { "SST25VF064", 0x4b, 0x1000, 2048, }, | |
45 | { 0 }, | |
46 | }; | |
47 | ||
48 | static struct ssb_sflash_tbl_e ssb_sflash_at_tbl[] = { | |
49 | { "AT45DB011", 0xc, 256, 512, }, | |
50 | { "AT45DB021", 0x14, 256, 1024, }, | |
51 | { "AT45DB041", 0x1c, 256, 2048, }, | |
52 | { "AT45DB081", 0x24, 256, 4096, }, | |
53 | { "AT45DB161", 0x2c, 512, 4096, }, | |
54 | { "AT45DB321", 0x34, 512, 8192, }, | |
55 | { "AT45DB642", 0x3c, 1024, 8192, }, | |
56 | { 0 }, | |
57 | }; | |
58 | ||
59 | static void ssb_sflash_cmd(struct ssb_chipcommon *cc, u32 opcode) | |
60 | { | |
61 | int i; | |
62 | chipco_write32(cc, SSB_CHIPCO_FLASHCTL, | |
63 | SSB_CHIPCO_FLASHCTL_START | opcode); | |
64 | for (i = 0; i < 1000; i++) { | |
65 | if (!(chipco_read32(cc, SSB_CHIPCO_FLASHCTL) & | |
66 | SSB_CHIPCO_FLASHCTL_BUSY)) | |
67 | return; | |
68 | cpu_relax(); | |
69 | } | |
70 | pr_err("SFLASH control command failed (timeout)!\n"); | |
71 | } | |
72 | ||
72a525cb RM |
73 | /* Initialize serial flash access */ |
74 | int ssb_sflash_init(struct ssb_chipcommon *cc) | |
75 | { | |
59015278 RM |
76 | struct ssb_sflash_tbl_e *e; |
77 | u32 id, id2; | |
78 | ||
79 | switch (cc->capabilities & SSB_CHIPCO_CAP_FLASHT) { | |
80 | case SSB_CHIPCO_FLASHT_STSER: | |
81 | ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_DP); | |
82 | ||
83 | chipco_write32(cc, SSB_CHIPCO_FLASHADDR, 0); | |
84 | ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RES); | |
85 | id = chipco_read32(cc, SSB_CHIPCO_FLASHDATA); | |
86 | ||
87 | chipco_write32(cc, SSB_CHIPCO_FLASHADDR, 1); | |
88 | ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RES); | |
89 | id2 = chipco_read32(cc, SSB_CHIPCO_FLASHDATA); | |
90 | ||
91 | switch (id) { | |
92 | case 0xbf: | |
93 | for (e = ssb_sflash_sst_tbl; e->name; e++) { | |
94 | if (e->id == id2) | |
95 | break; | |
96 | } | |
97 | break; | |
98 | case 0x13: | |
99 | return -ENOTSUPP; | |
100 | default: | |
101 | for (e = ssb_sflash_st_tbl; e->name; e++) { | |
102 | if (e->id == id) | |
103 | break; | |
104 | } | |
105 | break; | |
106 | } | |
107 | if (!e->name) { | |
108 | pr_err("Unsupported ST serial flash (id: 0x%X, id2: 0x%X)\n", | |
109 | id, id2); | |
110 | return -ENOTSUPP; | |
111 | } | |
112 | ||
113 | break; | |
114 | case SSB_CHIPCO_FLASHT_ATSER: | |
115 | ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_AT_STATUS); | |
116 | id = chipco_read32(cc, SSB_CHIPCO_FLASHDATA) & 0x3c; | |
117 | ||
118 | for (e = ssb_sflash_at_tbl; e->name; e++) { | |
119 | if (e->id == id) | |
120 | break; | |
121 | } | |
122 | if (!e->name) { | |
123 | pr_err("Unsupported Atmel serial flash (id: 0x%X)\n", | |
124 | id); | |
125 | return -ENOTSUPP; | |
126 | } | |
127 | ||
128 | break; | |
129 | default: | |
130 | pr_err("Unsupported flash type\n"); | |
131 | return -ENOTSUPP; | |
132 | } | |
133 | ||
134 | pr_info("Found %s serial flash (blocksize: 0x%X, blocks: %d)\n", | |
135 | e->name, e->blocksize, e->numblocks); | |
136 | ||
72a525cb RM |
137 | pr_err("Serial flash support is not implemented yet!\n"); |
138 | ||
139 | return -ENOTSUPP; | |
140 | } |