2 * Copyright © 2009 - Maxim Levitsky
3 * Common routines & support for xD format
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 #include <linux/kernel.h>
10 #include <linux/mtd/rawnand.h>
11 #include <linux/module.h>
12 #include <linux/sizes.h>
13 #include "sm_common.h"
15 static int oob_sm_ooblayout_ecc(struct mtd_info *mtd, int section,
16 struct mtd_oob_region *oobregion)
21 oobregion->length = 3;
22 oobregion->offset = ((section + 1) * 8) - 3;
27 static int oob_sm_ooblayout_free(struct mtd_info *mtd, int section,
28 struct mtd_oob_region *oobregion)
33 oobregion->offset = 0;
34 oobregion->length = 4;
38 oobregion->offset = 6;
39 oobregion->length = 2;
43 oobregion->offset = 11;
44 oobregion->length = 2;
53 static const struct mtd_ooblayout_ops oob_sm_ops = {
54 .ecc = oob_sm_ooblayout_ecc,
55 .free = oob_sm_ooblayout_free,
58 /* NOTE: This layout is is not compatabable with SmartMedia, */
59 /* because the 256 byte devices have page depenent oob layout */
60 /* However it does preserve the bad block markers */
61 /* If you use smftl, it will bypass this and work correctly */
62 /* If you not, then you break SmartMedia compliance anyway */
64 static int oob_sm_small_ooblayout_ecc(struct mtd_info *mtd, int section,
65 struct mtd_oob_region *oobregion)
70 oobregion->length = 3;
71 oobregion->offset = 0;
76 static int oob_sm_small_ooblayout_free(struct mtd_info *mtd, int section,
77 struct mtd_oob_region *oobregion)
82 oobregion->offset = 3;
83 oobregion->length = 2;
87 oobregion->offset = 6;
88 oobregion->length = 2;
97 static const struct mtd_ooblayout_ops oob_sm_small_ops = {
98 .ecc = oob_sm_small_ooblayout_ecc,
99 .free = oob_sm_small_ooblayout_free,
102 static int sm_block_markbad(struct mtd_info *mtd, loff_t ofs)
104 struct mtd_oob_ops ops;
108 memset(&oob, -1, SM_OOB_SIZE);
109 oob.block_status = 0x0F;
111 /* As long as this function is called on erase block boundaries
112 it will work correctly for 256 byte nand */
113 ops.mode = MTD_OPS_PLACE_OOB;
115 ops.ooblen = mtd->oobsize;
116 ops.oobbuf = (void *)&oob;
120 ret = mtd_write_oob(mtd, ofs, &ops);
121 if (ret < 0 || ops.oobretlen != SM_OOB_SIZE) {
122 pr_notice("sm_common: can't mark sector at %i as bad\n",
130 static struct nand_flash_dev nand_smartmedia_flash_ids[] = {
131 LEGACY_ID_NAND("SmartMedia 2MiB 3,3V ROM", 0x5d, 2, SZ_8K, NAND_ROM),
132 LEGACY_ID_NAND("SmartMedia 4MiB 3,3V", 0xe3, 4, SZ_8K, 0),
133 LEGACY_ID_NAND("SmartMedia 4MiB 3,3/5V", 0xe5, 4, SZ_8K, 0),
134 LEGACY_ID_NAND("SmartMedia 4MiB 5V", 0x6b, 4, SZ_8K, 0),
135 LEGACY_ID_NAND("SmartMedia 4MiB 3,3V ROM", 0xd5, 4, SZ_8K, NAND_ROM),
136 LEGACY_ID_NAND("SmartMedia 8MiB 3,3V", 0xe6, 8, SZ_8K, 0),
137 LEGACY_ID_NAND("SmartMedia 8MiB 3,3V ROM", 0xd6, 8, SZ_8K, NAND_ROM),
138 LEGACY_ID_NAND("SmartMedia 16MiB 3,3V", 0x73, 16, SZ_16K, 0),
139 LEGACY_ID_NAND("SmartMedia 16MiB 3,3V ROM", 0x57, 16, SZ_16K, NAND_ROM),
140 LEGACY_ID_NAND("SmartMedia 32MiB 3,3V", 0x75, 32, SZ_16K, 0),
141 LEGACY_ID_NAND("SmartMedia 32MiB 3,3V ROM", 0x58, 32, SZ_16K, NAND_ROM),
142 LEGACY_ID_NAND("SmartMedia 64MiB 3,3V", 0x76, 64, SZ_16K, 0),
143 LEGACY_ID_NAND("SmartMedia 64MiB 3,3V ROM", 0xd9, 64, SZ_16K, NAND_ROM),
144 LEGACY_ID_NAND("SmartMedia 128MiB 3,3V", 0x79, 128, SZ_16K, 0),
145 LEGACY_ID_NAND("SmartMedia 128MiB 3,3V ROM", 0xda, 128, SZ_16K, NAND_ROM),
146 LEGACY_ID_NAND("SmartMedia 256MiB 3, 3V", 0x71, 256, SZ_16K, 0),
147 LEGACY_ID_NAND("SmartMedia 256MiB 3,3V ROM", 0x5b, 256, SZ_16K, NAND_ROM),
151 static struct nand_flash_dev nand_xd_flash_ids[] = {
152 LEGACY_ID_NAND("xD 16MiB 3,3V", 0x73, 16, SZ_16K, 0),
153 LEGACY_ID_NAND("xD 32MiB 3,3V", 0x75, 32, SZ_16K, 0),
154 LEGACY_ID_NAND("xD 64MiB 3,3V", 0x76, 64, SZ_16K, 0),
155 LEGACY_ID_NAND("xD 128MiB 3,3V", 0x79, 128, SZ_16K, 0),
156 LEGACY_ID_NAND("xD 256MiB 3,3V", 0x71, 256, SZ_16K, NAND_BROKEN_XD),
157 LEGACY_ID_NAND("xD 512MiB 3,3V", 0xdc, 512, SZ_16K, NAND_BROKEN_XD),
158 LEGACY_ID_NAND("xD 1GiB 3,3V", 0xd3, 1024, SZ_16K, NAND_BROKEN_XD),
159 LEGACY_ID_NAND("xD 2GiB 3,3V", 0xd5, 2048, SZ_16K, NAND_BROKEN_XD),
163 static int sm_attach_chip(struct nand_chip *chip)
165 struct mtd_info *mtd = nand_to_mtd(chip);
167 /* Bad block marker position */
168 chip->badblockpos = 0x05;
169 chip->badblockbits = 7;
170 chip->block_markbad = sm_block_markbad;
173 if (mtd->writesize == SM_SECTOR_SIZE)
174 mtd_set_ooblayout(mtd, &oob_sm_ops);
175 else if (mtd->writesize == SM_SMALL_PAGE)
176 mtd_set_ooblayout(mtd, &oob_sm_small_ops);
183 static const struct nand_controller_ops sm_controller_ops = {
184 .attach_chip = sm_attach_chip,
187 int sm_register_device(struct mtd_info *mtd, int smartmedia)
189 struct nand_chip *chip = mtd_to_nand(mtd);
190 struct nand_flash_dev *flash_ids;
193 chip->options |= NAND_SKIP_BBTSCAN;
195 /* Scan for card properties */
196 chip->dummy_controller.ops = &sm_controller_ops;
197 flash_ids = smartmedia ? nand_smartmedia_flash_ids : nand_xd_flash_ids;
198 ret = nand_scan_with_ids(chip, 1, flash_ids);
202 ret = mtd_device_register(mtd, NULL, 0);
208 EXPORT_SYMBOL_GPL(sm_register_device);
210 MODULE_LICENSE("GPL");
211 MODULE_AUTHOR("Maxim Levitsky <maximlevitsky@gmail.com>");
212 MODULE_DESCRIPTION("Common SmartMedia/xD functions");