From b20913e3cbc81daa2463c1bd812e568181f6a60a Mon Sep 17 00:00:00 2001 From: Mikhail Kshevetskiy Date: Tue, 10 Jan 2023 12:58:38 +0100 Subject: mtd/spinand: rework detect procedure for different READ_ID operation Currently there are 3 different variants of read_id implementation: 1. opcode only. Found in GD5FxGQ4xF. 2. opcode + 1 addr byte. Found in GD5GxGQ4xA/E 3. opcode + 1 dummy byte. Found in other currently supported chips. Original implementation was for variant 1 and let detect function of chips with variant 2 and 3 to ignore the first byte. This isn't robust: 1. For chips of variant 2, if SPI master doesn't keep MOSI low during read, chip will get a random id offset, and the entire id buffer will shift by that offset, causing detect failure. 2. For chips of variant 1, if it happens to get a devid that equals to manufacture id of variant 2 or 3 chips, it'll get incorrectly detected. This patch reworks detect procedure to address problems above. New logic do detection for all variants separatedly, in 1-2-3 order. Since all current detect methods do exactly the same id matching procedure, unify them into core.c and remove detect method from manufacture_ops. This is a rework of Chuanhong Guo patch submitted to linux kernel Signed-off-by: Mikhail Kshevetskiy Signed-off-by: Frieder Schrempf Link: https://lore.kernel.org/all/20230110115843.391630-1-frieder@fris.de Signed-off-by: Dario Binacchi --- drivers/mtd/nand/spi/toshiba.c | 66 +++++++++++++++++++----------------------- 1 file changed, 30 insertions(+), 36 deletions(-) (limited to 'drivers/mtd/nand/spi/toshiba.c') diff --git a/drivers/mtd/nand/spi/toshiba.c b/drivers/mtd/nand/spi/toshiba.c index c2cd3b4..e057b08 100644 --- a/drivers/mtd/nand/spi/toshiba.c +++ b/drivers/mtd/nand/spi/toshiba.c @@ -111,7 +111,8 @@ static int tx58cxgxsxraix_ecc_get_status(struct spinand_device *spinand, static const struct spinand_info toshiba_spinand_table[] = { /* 3.3V 1Gb (1st generation) */ - SPINAND_INFO("TC58CVG0S3HRAIG", 0xC2, + SPINAND_INFO("TC58CVG0S3HRAIG", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xC2), NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -121,7 +122,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 3.3V 2Gb (1st generation) */ - SPINAND_INFO("TC58CVG1S3HRAIG", 0xCB, + SPINAND_INFO("TC58CVG1S3HRAIG", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xCB), NAND_MEMORG(1, 2048, 128, 64, 2048, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -131,7 +133,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 3.3V 4Gb (1st generation) */ - SPINAND_INFO("TC58CVG2S0HRAIG", 0xCD, + SPINAND_INFO("TC58CVG2S0HRAIG", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xCD), NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -141,7 +144,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 1.8V 1Gb (1st generation) */ - SPINAND_INFO("TC58CYG0S3HRAIG", 0xB2, + SPINAND_INFO("TC58CYG0S3HRAIG", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xB2), NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -151,7 +155,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 1.8V 2Gb (1st generation) */ - SPINAND_INFO("TC58CYG1S3HRAIG", 0xBB, + SPINAND_INFO("TC58CYG1S3HRAIG", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xBB), NAND_MEMORG(1, 2048, 128, 64, 2048, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -161,7 +166,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 1.8V 4Gb (1st generation) */ - SPINAND_INFO("TC58CYG2S0HRAIG", 0xBD, + SPINAND_INFO("TC58CYG2S0HRAIG", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xBD), NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -176,7 +182,8 @@ static const struct spinand_info toshiba_spinand_table[] = { * QE_BIT. */ /* 3.3V 1Gb (2nd generation) */ - SPINAND_INFO("TC58CVG0S3HRAIJ", 0xE2, + SPINAND_INFO("TC58CVG0S3HRAIJ", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE2), NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -186,7 +193,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 3.3V 2Gb (2nd generation) */ - SPINAND_INFO("TC58CVG1S3HRAIJ", 0xEB, + SPINAND_INFO("TC58CVG1S3HRAIJ", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xEB), NAND_MEMORG(1, 2048, 128, 64, 2048, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -196,7 +204,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 3.3V 4Gb (2nd generation) */ - SPINAND_INFO("TC58CVG2S0HRAIJ", 0xED, + SPINAND_INFO("TC58CVG2S0HRAIJ", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xED), NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -206,7 +215,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 3.3V 8Gb (2nd generation) */ - SPINAND_INFO("TH58CVG3S0HRAIJ", 0xE4, + SPINAND_INFO("TH58CVG3S0HRAIJ", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4), NAND_MEMORG(1, 4096, 256, 64, 4096, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -216,7 +226,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 1.8V 1Gb (2nd generation) */ - SPINAND_INFO("TC58CYG0S3HRAIJ", 0xD2, + SPINAND_INFO("TC58CYG0S3HRAIJ", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xD2), NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -226,7 +237,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 1.8V 2Gb (2nd generation) */ - SPINAND_INFO("TC58CYG1S3HRAIJ", 0xDB, + SPINAND_INFO("TC58CYG1S3HRAIJ", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xDB), NAND_MEMORG(1, 2048, 128, 64, 2048, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -236,7 +248,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 1.8V 4Gb (2nd generation) */ - SPINAND_INFO("TC58CYG2S0HRAIJ", 0xDD, + SPINAND_INFO("TC58CYG2S0HRAIJ", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xDD), NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -246,7 +259,8 @@ static const struct spinand_info toshiba_spinand_table[] = { SPINAND_ECCINFO(&tx58cxgxsxraix_ooblayout, tx58cxgxsxraix_ecc_get_status)), /* 1.8V 8Gb (2nd generation) */ - SPINAND_INFO("TH58CYG3S0HRAIJ", 0xD4, + SPINAND_INFO("TH58CYG3S0HRAIJ", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xD4), NAND_MEMORG(1, 4096, 256, 64, 4096, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, @@ -257,33 +271,13 @@ static const struct spinand_info toshiba_spinand_table[] = { tx58cxgxsxraix_ecc_get_status)), }; -static int toshiba_spinand_detect(struct spinand_device *spinand) -{ - u8 *id = spinand->id.data; - int ret; - - /* - * Toshiba SPI NAND read ID needs a dummy byte, - * so the first byte in id is garbage. - */ - if (id[1] != SPINAND_MFR_TOSHIBA) - return 0; - - ret = spinand_match_and_init(spinand, toshiba_spinand_table, - ARRAY_SIZE(toshiba_spinand_table), - id[2]); - if (ret) - return ret; - - return 1; -} - static const struct spinand_manufacturer_ops toshiba_spinand_manuf_ops = { - .detect = toshiba_spinand_detect, }; const struct spinand_manufacturer toshiba_spinand_manufacturer = { .id = SPINAND_MFR_TOSHIBA, .name = "Toshiba", + .chips = toshiba_spinand_table, + .nchips = ARRAY_SIZE(toshiba_spinand_table), .ops = &toshiba_spinand_manuf_ops, }; -- cgit v1.1