2  * sharpslpart.c - MTD partition parser for NAND flash using the SHARP FTL
10  *     linux/include/asm-arm/sharp_nand_logical.h
57  * struct sharpsl_ftl - Sharp FTL Logical Table
59  * @log2phy:		the logical-to-physical table
61  * Structure containing the logical-to-physical translation table
89 			freebytes |= BIT(i - 8);  in sharpsl_nand_check_ooblayout()
95 	return -ENOTSUPP;  in sharpsl_nand_check_ooblayout()
104 	ops.ooblen = mtd->oobsize;  in sharpsl_nand_read_oob()
108 	if (ret != 0 || mtd->oobsize != ops.oobretlen)  in sharpsl_nand_read_oob()
109 		return -1;  in sharpsl_nand_read_oob()
116  * of the first page, in 3 16-bit copies with the following layout:
119  * -------- --------
124  * Reserved values 0xffff mean the block is kept for wear leveling.
127  * -------- --------
128  * ECC BB   xyxy    oob[8]==oob[10] && oob[9]==oob[11]   -> byte0=8   byte1=9
129  * ECC BB     xyxy  oob[10]==oob[12] && oob[11]==oob[13] -> byte0=10  byte1=11
130  * ECC BB   xy  xy  oob[12]==oob[8] && oob[13]==oob[9]   -> byte0=12  byte1=13
150 		return -EINVAL;  in sharpsl_nand_get_logical_num()
157 		return -EINVAL;  in sharpsl_nand_get_logical_num()
173 	oob = kzalloc(mtd->oobsize, GFP_KERNEL);  in sharpsl_nand_init_ftl()
175 		return -ENOMEM;  in sharpsl_nand_init_ftl()
180 	ftl->logmax = ((phymax * 95) / 100) - 1;  in sharpsl_nand_init_ftl()
182 	ftl->log2phy = kmalloc_array(ftl->logmax, sizeof(*ftl->log2phy),  in sharpsl_nand_init_ftl()
184 	if (!ftl->log2phy) {  in sharpsl_nand_init_ftl()
185 		ret = -ENOMEM;  in sharpsl_nand_init_ftl()
189 	/* initialize ftl->log2phy */  in sharpsl_nand_init_ftl()
190 	for (i = 0; i < ftl->logmax; i++)  in sharpsl_nand_init_ftl()
191 		ftl->log2phy[i] = UINT_MAX;  in sharpsl_nand_init_ftl()
193 	/* create physical-logical table */  in sharpsl_nand_init_ftl()
195 		block_adr = (loff_t)block_num * mtd->erasesize;  in sharpsl_nand_init_ftl()
206 		/* cut-off errors and skip the out-of-range values */  in sharpsl_nand_init_ftl()
207 		if (log_num > 0 && log_num < ftl->logmax) {  in sharpsl_nand_init_ftl()
208 			if (ftl->log2phy[log_num] == UINT_MAX)  in sharpsl_nand_init_ftl()
209 				ftl->log2phy[log_num] = block_num;  in sharpsl_nand_init_ftl()
214 		phymax, ftl->logmax, phymax - ftl->logmax);  in sharpsl_nand_init_ftl()
224 	kfree(ftl->log2phy);  in sharpsl_nand_cleanup_ftl()
241 	final_log_num = mtd_div_by_eb(((u32)from + len - 1), mtd);  in sharpsl_nand_read_laddr()
243 	if (len <= 0 || log_num >= ftl->logmax || final_log_num > log_num)  in sharpsl_nand_read_laddr()
244 		return -EINVAL;  in sharpsl_nand_read_laddr()
246 	block_num = ftl->log2phy[log_num];  in sharpsl_nand_read_laddr()
247 	block_adr = (loff_t)block_num * mtd->erasesize;  in sharpsl_nand_read_laddr()
256 		err = -EIO;  in sharpsl_nand_read_laddr()
268  * Sample values read from SL-C860
306 		return -EINVAL;  in sharpsl_nand_read_partinfo()
310 	buf[2].end = cpu_to_le32(master->size);  in sharpsl_nand_read_partinfo()
319 		return -EINVAL;  in sharpsl_nand_read_partinfo()
369 		return -ENOMEM;  in sharpsl_parse_mtd_partitions()
374 	sharpsl_nand_parts[0].size = le32_to_cpu(buf[0].end) -  in sharpsl_parse_mtd_partitions()
379 	sharpsl_nand_parts[1].size = le32_to_cpu(buf[1].end) -  in sharpsl_parse_mtd_partitions()
384 	sharpsl_nand_parts[2].size = le32_to_cpu(buf[2].end) -  in sharpsl_parse_mtd_partitions()