4  *  Bad Block Table support for the OneNAND driver
32  * Check for a pattern at the given place. Used to search bad block
33  * tables and good / bad block identifiers. Same as check_pattern, but
52  * create_bbt - [GENERIC] Create a bad block table by scanning the device
55  * @param bd		descriptor for the good/bad block search pattern
59  * Create a bad block table by scanning the device
60  * for the given good/bad block identify pattern
105 			/* If it is a initial bad block, just ignore it */  in create_bbt()
131  * onenand_memory_bbt - [GENERIC] create a memory based bad block table
133  * @param bd		descriptor for the good/bad block search pattern
147  * onenand_isbad_bbt - [OneNAND Interface] Check if a block is bad
150  * @param allowbbt	allow access to bad block table region
156 	int block;  in onenand_isbad_bbt()  local
159 	/* Get block number * 2 */  in onenand_isbad_bbt()
160 	block = (int) (onenand_block(this, offs) << 1);  in onenand_isbad_bbt()
161 	res = (bbm->bbt[block >> 3] >> (block & 0x06)) & 0x03;  in onenand_isbad_bbt()
163 	pr_debug("onenand_isbad_bbt: bbt info for offs 0x%08x: (block %d) 0x%02x\n",  in onenand_isbad_bbt()
164 		 (unsigned int)offs, block >> 1, res);  in onenand_isbad_bbt()
179  * onenand_scan_bbt - [OneNAND Interface] scan, find, read and maybe create bad block table(s)
181  * @param bd		descriptor for the good/bad block search pattern
183  * The function checks, if a bad block table(s) is/are already
185  * marked good / bad blocks and writes the bad block table(s) to
188  * The bad block table memory is allocated here. It must be freed
199 	/* Allocate memory (2bit per block) */  in onenand_scan_bbt()
203 	/* Clear the memory bad block table */  in onenand_scan_bbt()
206 	/* Set the bad block position */  in onenand_scan_bbt()
215 	/* Scan the device to build a memory based bad block table */  in onenand_scan_bbt()
227  * Define some generic bad / good block scan pattern which are used
240  * onenand_default_bbt - [OneNAND Interface] Select a default bad block table for the device
243  * This function selects the default bad block table