1/*
2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
3 *
4 * Copyright (C) 2002-2007 Aleph One Ltd.
5 *   for Toby Churchill Ltd and Brightstar Engineering
6 *
7 * Created by Charles Manning <charles@aleph1.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* XXX U-BOOT XXX */
15#include <common.h>
16
17#include "yportenv.h"
18
19
20#include "yaffs_mtdif.h"
21
22#include <linux/mtd/mtd.h>
23#include <linux/types.h>
24#include <linux/time.h>
25#include <linux/mtd/rawnand.h>
26
27
28static inline void translate_spare2oob(const struct yaffs_spare *spare, u8 *oob)
29{
30	oob[0] = spare->tb0;
31	oob[1] = spare->tb1;
32	oob[2] = spare->tb2;
33	oob[3] = spare->tb3;
34	oob[4] = spare->tb4;
35	oob[5] = spare->tb5 & 0x3f;
36	oob[5] |= spare->block_status == 'Y' ? 0 : 0x80;
37	oob[5] |= spare->page_status == 0 ? 0 : 0x40;
38	oob[6] = spare->tb6;
39	oob[7] = spare->tb7;
40}
41
42static inline void translate_oob2spare(struct yaffs_spare *spare, u8 *oob)
43{
44	struct yaffs_nand_spare *nspare = (struct yaffs_nand_spare *)spare;
45	spare->tb0 = oob[0];
46	spare->tb1 = oob[1];
47	spare->tb2 = oob[2];
48	spare->tb3 = oob[3];
49	spare->tb4 = oob[4];
50	spare->tb5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
51	spare->block_status = oob[5] & 0x80 ? 0xff : 'Y';
52	spare->page_status = oob[5] & 0x40 ? 0xff : 0;
53	spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
54	spare->tb6 = oob[6];
55	spare->tb7 = oob[7];
56	spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
57
58	nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
59}
60
61
62int nandmtd_WriteChunkToNAND(struct yaffs_dev *dev, int chunkInNAND,
63			     const u8 *data, const struct yaffs_spare *spare)
64{
65	struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
66	struct mtd_oob_ops ops;
67	size_t dummy;
68	int retval = 0;
69	loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk;
70	u8 spareAsBytes[8]; /* OOB */
71
72	if (data && !spare)
73		retval = mtd_write(mtd, addr, dev->data_bytes_per_chunk,
74				&dummy, data);
75	else if (spare) {
76		if (dev->param.use_nand_ecc) {
77			translate_spare2oob(spare, spareAsBytes);
78			ops.mode = MTD_OPS_AUTO_OOB;
79			ops.ooblen = 8; /* temp hack */
80		} else {
81			ops.mode = MTD_OPS_RAW;
82			ops.ooblen = YAFFS_BYTES_PER_SPARE;
83		}
84		ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen;
85		ops.datbuf = (u8 *)data;
86		ops.ooboffs = 0;
87		ops.oobbuf = spareAsBytes;
88		retval = mtd_write_oob(mtd, addr, &ops);
89	}
90
91	if (retval == 0)
92		return YAFFS_OK;
93	else
94		return YAFFS_FAIL;
95}
96
97int nandmtd_ReadChunkFromNAND(struct yaffs_dev *dev, int chunkInNAND, u8 *data,
98			      struct yaffs_spare *spare)
99{
100	struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
101	struct mtd_oob_ops ops;
102	size_t dummy;
103	int retval = 0;
104
105	loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk;
106	u8 spareAsBytes[8]; /* OOB */
107
108	if (data && !spare)
109		retval = mtd_read(mtd, addr, dev->data_bytes_per_chunk,
110				&dummy, data);
111	else if (spare) {
112		if (dev->param.use_nand_ecc) {
113			ops.mode = MTD_OPS_AUTO_OOB;
114			ops.ooblen = 8; /* temp hack */
115		} else {
116			ops.mode = MTD_OPS_RAW;
117			ops.ooblen = YAFFS_BYTES_PER_SPARE;
118		}
119		ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen;
120		ops.datbuf = data;
121		ops.ooboffs = 0;
122		ops.oobbuf = spareAsBytes;
123		retval = mtd_read_oob(mtd, addr, &ops);
124		if (dev->param.use_nand_ecc)
125			translate_oob2spare(spare, spareAsBytes);
126	}
127
128	if (retval == 0)
129		return YAFFS_OK;
130	else
131		return YAFFS_FAIL;
132}
133
134int nandmtd_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber)
135{
136	struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
137	__u32 addr =
138	    ((loff_t) blockNumber) * dev->data_bytes_per_chunk
139		* dev->param.chunks_per_block;
140	struct erase_info ei;
141	int retval = 0;
142
143	ei.mtd = mtd;
144	ei.addr = addr;
145	ei.len = dev->data_bytes_per_chunk * dev->param.chunks_per_block;
146	ei.time = 1000;
147	ei.retries = 2;
148	ei.priv = (u_long) dev;
149
150	/* Todo finish off the ei if required */
151
152
153	retval = mtd_erase(mtd, &ei);
154
155	if (retval == 0)
156		return YAFFS_OK;
157	else
158		return YAFFS_FAIL;
159}
160
161int nandmtd_InitialiseNAND(struct yaffs_dev *dev)
162{
163	return YAFFS_OK;
164}
165