1 // SPDX-License-Identifier: GPL-2.0-or-later
6  * Author: Boris Brezillon <boris.brezillon@free-electrons.com>
11 static void samsung_nand_decode_id(struct nand_chip *chip)  in samsung_nand_decode_id()  argument
13 	struct nand_device *base = &chip->base;  in samsung_nand_decode_id()
15 	struct mtd_info *mtd = nand_to_mtd(chip);  in samsung_nand_decode_id()
18 	memorg = nanddev_get_memorg(&chip->base);  in samsung_nand_decode_id()
20 	/* New Samsung (6 byte ID): Samsung K9GAG08U0F (p.44) */  in samsung_nand_decode_id()
21 	if (chip->id.len == 6 && !nand_is_slc(chip) &&  in samsung_nand_decode_id()
22 	    chip->id.data[5] != 0x00) {  in samsung_nand_decode_id()
23 		u8 extid = chip->id.data[3];  in samsung_nand_decode_id()
26 		memorg->pagesize = 2048 << (extid & 0x03);  in samsung_nand_decode_id()
27 		mtd->writesize = memorg->pagesize;  in samsung_nand_decode_id()
34 			memorg->oobsize = 128;  in samsung_nand_decode_id()
37 			memorg->oobsize = 218;  in samsung_nand_decode_id()
40 			memorg->oobsize = 400;  in samsung_nand_decode_id()
43 			memorg->oobsize = 436;  in samsung_nand_decode_id()
46 			memorg->oobsize = 512;  in samsung_nand_decode_id()
49 			memorg->oobsize = 640;  in samsung_nand_decode_id()
55 			 * a different extended ID format, and we should find  in samsung_nand_decode_id()
62 		mtd->oobsize = memorg->oobsize;  in samsung_nand_decode_id()
66 		memorg->pages_per_eraseblock = (128 * 1024) <<  in samsung_nand_decode_id()
69 					       memorg->pagesize;  in samsung_nand_decode_id()
70 		mtd->erasesize = (128 * 1024) <<  in samsung_nand_decode_id()
73 		/* Extract ECC requirements from 5th id byte*/  in samsung_nand_decode_id()
74 		extid = (chip->id.data[4] >> 4) & 0x07;  in samsung_nand_decode_id()
96 		nand_decode_ext_id(chip);  in samsung_nand_decode_id()
98 		if (nand_is_slc(chip)) {  in samsung_nand_decode_id()
99 			switch (chip->id.data[1]) {  in samsung_nand_decode_id()
100 			/* K9F4G08U0D-S[I|C]B0(T00) */  in samsung_nand_decode_id()
108 				if (chip->id.len > 4 &&  in samsung_nand_decode_id()
109 				    (chip->id.data[4] & GENMASK(1, 0)) == 0x1)  in samsung_nand_decode_id()
110 					chip->options |= NAND_NO_SUBPAGE_WRITE;  in samsung_nand_decode_id()
121 static int samsung_nand_init(struct nand_chip *chip)  in samsung_nand_init()  argument
123 	struct mtd_info *mtd = nand_to_mtd(chip);  in samsung_nand_init()
125 	if (mtd->writesize > 512)  in samsung_nand_init()
126 		chip->options |= NAND_SAMSUNG_LP_OPTIONS;  in samsung_nand_init()
128 	if (!nand_is_slc(chip))  in samsung_nand_init()
129 		chip->options |= NAND_BBM_LASTPAGE;  in samsung_nand_init()
131 		chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;  in samsung_nand_init()