Commit | Line | Data |
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23cb3b21 RM |
1 | /* |
2 | * Broadcom specific AMBA | |
3 | * ChipCommon serial flash interface | |
4 | * | |
5 | * Licensed under the GNU/GPL. See COPYING for details. | |
6 | */ | |
7 | ||
58b27101 RM |
8 | #include "bcma_private.h" |
9 | ||
d57ef3a6 | 10 | #include <linux/platform_device.h> |
23cb3b21 | 11 | #include <linux/bcma/bcma.h> |
23cb3b21 | 12 | |
d57ef3a6 RM |
13 | static struct resource bcma_sflash_resource = { |
14 | .name = "bcma_sflash", | |
cc787081 | 15 | .start = BCMA_SOC_FLASH2, |
d57ef3a6 RM |
16 | .end = 0, |
17 | .flags = IORESOURCE_MEM | IORESOURCE_READONLY, | |
18 | }; | |
19 | ||
20 | struct platform_device bcma_sflash_dev = { | |
21 | .name = "bcma_sflash", | |
22 | .resource = &bcma_sflash_resource, | |
23 | .num_resources = 1, | |
24 | }; | |
25 | ||
26 | struct bcma_sflash_tbl_e { | |
27 | char *name; | |
28 | u32 id; | |
29 | u32 blocksize; | |
30 | u16 numblocks; | |
31 | }; | |
32 | ||
33 | static struct bcma_sflash_tbl_e bcma_sflash_st_tbl[] = { | |
e5c9d7c0 HM |
34 | { "M25P20", 0x11, 0x10000, 4, }, |
35 | { "M25P40", 0x12, 0x10000, 8, }, | |
36 | ||
37 | { "M25P16", 0x14, 0x10000, 32, }, | |
4dd6ff72 | 38 | { "M25P32", 0x15, 0x10000, 64, }, |
e5c9d7c0 HM |
39 | { "M25P64", 0x16, 0x10000, 128, }, |
40 | { "M25FL128", 0x17, 0x10000, 256, }, | |
d57ef3a6 RM |
41 | { 0 }, |
42 | }; | |
43 | ||
44 | static struct bcma_sflash_tbl_e bcma_sflash_sst_tbl[] = { | |
e5c9d7c0 HM |
45 | { "SST25WF512", 1, 0x1000, 16, }, |
46 | { "SST25VF512", 0x48, 0x1000, 16, }, | |
47 | { "SST25WF010", 2, 0x1000, 32, }, | |
48 | { "SST25VF010", 0x49, 0x1000, 32, }, | |
49 | { "SST25WF020", 3, 0x1000, 64, }, | |
50 | { "SST25VF020", 0x43, 0x1000, 64, }, | |
51 | { "SST25WF040", 4, 0x1000, 128, }, | |
52 | { "SST25VF040", 0x44, 0x1000, 128, }, | |
53 | { "SST25VF040B", 0x8d, 0x1000, 128, }, | |
54 | { "SST25WF080", 5, 0x1000, 256, }, | |
55 | { "SST25VF080B", 0x8e, 0x1000, 256, }, | |
56 | { "SST25VF016", 0x41, 0x1000, 512, }, | |
57 | { "SST25VF032", 0x4a, 0x1000, 1024, }, | |
58 | { "SST25VF064", 0x4b, 0x1000, 2048, }, | |
d57ef3a6 RM |
59 | { 0 }, |
60 | }; | |
61 | ||
62 | static struct bcma_sflash_tbl_e bcma_sflash_at_tbl[] = { | |
e5c9d7c0 HM |
63 | { "AT45DB011", 0xc, 256, 512, }, |
64 | { "AT45DB021", 0x14, 256, 1024, }, | |
65 | { "AT45DB041", 0x1c, 256, 2048, }, | |
66 | { "AT45DB081", 0x24, 256, 4096, }, | |
67 | { "AT45DB161", 0x2c, 512, 4096, }, | |
68 | { "AT45DB321", 0x34, 512, 8192, }, | |
69 | { "AT45DB642", 0x3c, 1024, 8192, }, | |
d57ef3a6 RM |
70 | { 0 }, |
71 | }; | |
72 | ||
73 | static void bcma_sflash_cmd(struct bcma_drv_cc *cc, u32 opcode) | |
74 | { | |
75 | int i; | |
76 | bcma_cc_write32(cc, BCMA_CC_FLASHCTL, | |
77 | BCMA_CC_FLASHCTL_START | opcode); | |
78 | for (i = 0; i < 1000; i++) { | |
79 | if (!(bcma_cc_read32(cc, BCMA_CC_FLASHCTL) & | |
80 | BCMA_CC_FLASHCTL_BUSY)) | |
81 | return; | |
82 | cpu_relax(); | |
83 | } | |
84 | bcma_err(cc->core->bus, "SFLASH control command failed (timeout)!\n"); | |
85 | } | |
86 | ||
23cb3b21 RM |
87 | /* Initialize serial flash access */ |
88 | int bcma_sflash_init(struct bcma_drv_cc *cc) | |
89 | { | |
d57ef3a6 RM |
90 | struct bcma_bus *bus = cc->core->bus; |
91 | struct bcma_sflash *sflash = &cc->sflash; | |
92 | struct bcma_sflash_tbl_e *e; | |
93 | u32 id, id2; | |
94 | ||
95 | switch (cc->capabilities & BCMA_CC_CAP_FLASHT) { | |
96 | case BCMA_CC_FLASHT_STSER: | |
97 | bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_DP); | |
98 | ||
99 | bcma_cc_write32(cc, BCMA_CC_FLASHADDR, 0); | |
100 | bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_RES); | |
101 | id = bcma_cc_read32(cc, BCMA_CC_FLASHDATA); | |
102 | ||
103 | bcma_cc_write32(cc, BCMA_CC_FLASHADDR, 1); | |
104 | bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_RES); | |
105 | id2 = bcma_cc_read32(cc, BCMA_CC_FLASHDATA); | |
106 | ||
107 | switch (id) { | |
108 | case 0xbf: | |
109 | for (e = bcma_sflash_sst_tbl; e->name; e++) { | |
110 | if (e->id == id2) | |
111 | break; | |
112 | } | |
113 | break; | |
e5c9d7c0 HM |
114 | case 0x13: |
115 | return -ENOTSUPP; | |
d57ef3a6 RM |
116 | default: |
117 | for (e = bcma_sflash_st_tbl; e->name; e++) { | |
118 | if (e->id == id) | |
119 | break; | |
120 | } | |
121 | break; | |
122 | } | |
123 | if (!e->name) { | |
124 | bcma_err(bus, "Unsupported ST serial flash (id: 0x%X, id2: 0x%X)\n", id, id2); | |
125 | return -ENOTSUPP; | |
126 | } | |
127 | ||
128 | break; | |
129 | case BCMA_CC_FLASHT_ATSER: | |
130 | bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_STATUS); | |
131 | id = bcma_cc_read32(cc, BCMA_CC_FLASHDATA) & 0x3c; | |
132 | ||
133 | for (e = bcma_sflash_at_tbl; e->name; e++) { | |
134 | if (e->id == id) | |
135 | break; | |
136 | } | |
137 | if (!e->name) { | |
138 | bcma_err(bus, "Unsupported Atmel serial flash (id: 0x%X)\n", id); | |
139 | return -ENOTSUPP; | |
140 | } | |
141 | ||
142 | break; | |
143 | default: | |
144 | bcma_err(bus, "Unsupported flash type\n"); | |
145 | return -ENOTSUPP; | |
146 | } | |
147 | ||
cc787081 | 148 | sflash->window = BCMA_SOC_FLASH2; |
d57ef3a6 RM |
149 | sflash->blocksize = e->blocksize; |
150 | sflash->numblocks = e->numblocks; | |
151 | sflash->size = sflash->blocksize * sflash->numblocks; | |
152 | sflash->present = true; | |
153 | ||
154 | bcma_info(bus, "Found %s serial flash (size: %dKiB, blocksize: 0x%X, blocks: %d)\n", | |
155 | e->name, sflash->size / 1024, sflash->blocksize, | |
156 | sflash->numblocks); | |
157 | ||
158 | /* Prepare platform device, but don't register it yet. It's too early, | |
159 | * malloc (required by device_private_init) is not available yet. */ | |
160 | bcma_sflash_dev.resource[0].end = bcma_sflash_dev.resource[0].start + | |
161 | sflash->size; | |
162 | bcma_sflash_dev.dev.platform_data = sflash; | |
163 | ||
23cb3b21 RM |
164 | return 0; |
165 | } |