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Merge branch 'master' of git://git.denx.de/u-boot-microblaze
[karo-tx-uboot.git] / drivers / mtd / spi / stmicro.c
1 /*
2  * (C) Copyright 2000-2002
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * Copyright 2008, Network Appliance Inc.
6  * Jason McMullan <mcmullan@netapp.com>
7  *
8  * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
9  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
10  *
11  * See file CREDITS for list of people who contributed to this
12  * project.
13  *
14  * This program is free software; you can redistribute it and/or
15  * modify it under the terms of the GNU General Public License as
16  * published by the Free Software Foundation; either version 2 of
17  * the License, or (at your option) any later version.
18  *
19  * This program is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22  * GNU General Public License for more details.
23  *
24  * You should have received a copy of the GNU General Public License
25  * along with this program; if not, write to the Free Software
26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27  * MA 02111-1307 USA
28  */
29
30 #include <common.h>
31 #include <malloc.h>
32 #include <spi_flash.h>
33
34 #include "spi_flash_internal.h"
35
36 /* M25Pxx-specific commands */
37 #define CMD_M25PXX_RES          0xab    /* Release from DP, and Read Signature */
38
39 struct stmicro_spi_flash_params {
40         u8 idcode1;
41         u16 pages_per_sector;
42         u16 nr_sectors;
43         const char *name;
44 };
45
46 static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
47         {
48                 .idcode1 = 0x11,
49                 .pages_per_sector = 128,
50                 .nr_sectors = 4,
51                 .name = "M25P10",
52         },
53         {
54                 .idcode1 = 0x15,
55                 .pages_per_sector = 256,
56                 .nr_sectors = 32,
57                 .name = "M25P16",
58         },
59         {
60                 .idcode1 = 0x12,
61                 .pages_per_sector = 256,
62                 .nr_sectors = 4,
63                 .name = "M25P20",
64         },
65         {
66                 .idcode1 = 0x16,
67                 .pages_per_sector = 256,
68                 .nr_sectors = 64,
69                 .name = "M25P32",
70         },
71         {
72                 .idcode1 = 0x13,
73                 .pages_per_sector = 256,
74                 .nr_sectors = 8,
75                 .name = "M25P40",
76         },
77         {
78                 .idcode1 = 0x17,
79                 .pages_per_sector = 256,
80                 .nr_sectors = 128,
81                 .name = "M25P64",
82         },
83         {
84                 .idcode1 = 0x14,
85                 .pages_per_sector = 256,
86                 .nr_sectors = 16,
87                 .name = "M25P80",
88         },
89         {
90                 .idcode1 = 0x18,
91                 .pages_per_sector = 1024,
92                 .nr_sectors = 64,
93                 .name = "M25P128",
94         },
95         {
96                 .idcode1 = 0x19,
97                 .pages_per_sector = 256,
98                 .nr_sectors = 512,
99                 .name = "N25Q256",
100         },
101 };
102
103 struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
104 {
105         const struct stmicro_spi_flash_params *params;
106         struct spi_flash *flash;
107         unsigned int i;
108
109         if (idcode[0] == 0xff) {
110                 i = spi_flash_cmd(spi, CMD_M25PXX_RES,
111                                   idcode, 4);
112                 if (i)
113                         return NULL;
114                 if ((idcode[3] & 0xf0) == 0x10) {
115                         idcode[0] = 0x20;
116                         idcode[1] = 0x20;
117                         idcode[2] = idcode[3] + 1;
118                 } else
119                         return NULL;
120         }
121
122         for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
123                 params = &stmicro_spi_flash_table[i];
124                 if (params->idcode1 == idcode[2]) {
125                         break;
126                 }
127         }
128
129         if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
130                 debug("SF: Unsupported STMicro ID %02x\n", idcode[1]);
131                 return NULL;
132         }
133
134         flash = malloc(sizeof(*flash));
135         if (!flash) {
136                 debug("SF: Failed to allocate memory\n");
137                 return NULL;
138         }
139
140         flash->spi = spi;
141         flash->name = params->name;
142
143         flash->write = spi_flash_cmd_write_multi;
144         flash->erase = spi_flash_cmd_erase;
145         flash->read = spi_flash_cmd_read_fast;
146         flash->page_size = 256;
147         flash->sector_size = 256 * params->pages_per_sector;
148         flash->size = flash->sector_size * params->nr_sectors;
149
150         return flash;
151 }