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8#include "bcma_private.h"
9
10#include <linux/platform_device.h>
11#include <linux/bcma/bcma.h>
12
13static struct resource bcma_sflash_resource = {
14 .name = "bcma_sflash",
15 .start = BCMA_SOC_FLASH2,
16 .end = 0,
17 .flags = IORESOURCE_MEM | IORESOURCE_READONLY,
18};
19
20struct platform_device bcma_sflash_dev = {
21 .name = "bcma_sflash",
22 .resource = &bcma_sflash_resource,
23 .num_resources = 1,
24};
25
26struct bcma_sflash_tbl_e {
27 char *name;
28 u32 id;
29 u32 blocksize;
30 u16 numblocks;
31};
32
33static const struct bcma_sflash_tbl_e bcma_sflash_st_tbl[] = {
34 { "M25P20", 0x11, 0x10000, 4, },
35 { "M25P40", 0x12, 0x10000, 8, },
36
37 { "M25P16", 0x14, 0x10000, 32, },
38 { "M25P32", 0x15, 0x10000, 64, },
39 { "M25P64", 0x16, 0x10000, 128, },
40 { "M25FL128", 0x17, 0x10000, 256, },
41 { NULL },
42};
43
44static const struct bcma_sflash_tbl_e bcma_sflash_sst_tbl[] = {
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, },
59 { NULL },
60};
61
62static const struct bcma_sflash_tbl_e bcma_sflash_at_tbl[] = {
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, },
70 { NULL },
71};
72
73static 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
87
88int bcma_sflash_init(struct bcma_drv_cc *cc)
89{
90 struct bcma_bus *bus = cc->core->bus;
91 struct bcma_sflash *sflash = &cc->sflash;
92 const 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;
114 case 0x13:
115 return -ENOTSUPP;
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
148 sflash->window = BCMA_SOC_FLASH2;
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
159
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
164 return 0;
165}
166
