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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 | |
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 | |
73 | /* Initialize serial flash access */ |
74 | int ssb_sflash_init(struct ssb_chipcommon *cc) |
75 | { |
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 | |
137 | pr_err("Serial flash support is not implemented yet!\n"); |
138 | |
139 | return -ENOTSUPP; |
140 | } |
141 |
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