From: Miquel Raynal Date: Wed, 18 Jun 2025 12:14:23 +0000 (+0200) Subject: mtd: spinand: winbond: Enable high-speed modes on w25n0xjw X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f1a91175faaab02a45d1ceb313a315a5bfeb5416;p=thirdparty%2Flinux.git mtd: spinand: winbond: Enable high-speed modes on w25n0xjw w25n0xjw chips have a high-speed capability hidden in a configuration register. Once enabled, dual/quad SDR reads may be performed at a much higher frequency. Implement the new ->configure_chip() hook for this purpose and configure the SR4 register accordingly. Signed-off-by: Miquel Raynal --- diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c index 9ed3cf2e5dba0..93d22b412dd3f 100644 --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -20,7 +20,7 @@ #include #include -static int spinand_read_reg_op(struct spinand_device *spinand, u8 reg, u8 *val) +int spinand_read_reg_op(struct spinand_device *spinand, u8 reg, u8 *val) { struct spi_mem_op op = SPINAND_GET_FEATURE_1S_1S_1S_OP(reg, spinand->scratchbuf); diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c index 7a9e22e81dcf4..18ae6f58a546e 100644 --- a/drivers/mtd/nand/spi/winbond.c +++ b/drivers/mtd/nand/spi/winbond.c @@ -18,6 +18,9 @@ #define W25N04KV_STATUS_ECC_5_8_BITFLIPS (3 << 4) +#define W25N0XJW_SR4 0xD0 +#define W25N0XJW_SR4_HS BIT(2) + /* * "X2" in the core is equivalent to "dual output" in the datasheets, * "X4" in the core is equivalent to "quad output" in the datasheets. @@ -42,10 +45,12 @@ static SPINAND_OP_VARIANTS(update_cache_octal_variants, static SPINAND_OP_VARIANTS(read_cache_dual_quad_dtr_variants, SPINAND_PAGE_READ_FROM_CACHE_1S_4D_4D_OP(0, 8, NULL, 0, 80 * HZ_PER_MHZ), SPINAND_PAGE_READ_FROM_CACHE_1S_1D_4D_OP(0, 2, NULL, 0, 80 * HZ_PER_MHZ), + SPINAND_PAGE_READ_FROM_CACHE_1S_4S_4S_OP(0, 4, NULL, 0, 0), SPINAND_PAGE_READ_FROM_CACHE_1S_4S_4S_OP(0, 2, NULL, 0, 104 * HZ_PER_MHZ), SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0, 0), SPINAND_PAGE_READ_FROM_CACHE_1S_2D_2D_OP(0, 4, NULL, 0, 80 * HZ_PER_MHZ), SPINAND_PAGE_READ_FROM_CACHE_1S_1D_2D_OP(0, 2, NULL, 0, 80 * HZ_PER_MHZ), + SPINAND_PAGE_READ_FROM_CACHE_1S_2S_2S_OP(0, 2, NULL, 0, 0), SPINAND_PAGE_READ_FROM_CACHE_1S_2S_2S_OP(0, 1, NULL, 0, 104 * HZ_PER_MHZ), SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0, 0), SPINAND_PAGE_READ_FROM_CACHE_1S_1D_1D_OP(0, 2, NULL, 0, 80 * HZ_PER_MHZ), @@ -230,6 +235,40 @@ static int w25n02kv_ecc_get_status(struct spinand_device *spinand, return -EINVAL; } +static int w25n0xjw_hs_cfg(struct spinand_device *spinand) +{ + const struct spi_mem_op *op; + bool hs; + u8 sr4; + int ret; + + op = spinand->op_templates.read_cache; + if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr) + hs = false; + else if (op->cmd.buswidth == 1 && op->addr.buswidth == 1 && + op->dummy.buswidth == 1 && op->data.buswidth == 1) + hs = false; + else if (!op->max_freq) + hs = true; + else + hs = false; + + ret = spinand_read_reg_op(spinand, W25N0XJW_SR4, &sr4); + if (ret) + return ret; + + if (hs) + sr4 |= W25N0XJW_SR4_HS; + else + sr4 &= ~W25N0XJW_SR4_HS; + + ret = spinand_write_reg_op(spinand, W25N0XJW_SR4, sr4); + if (ret) + return ret; + + return 0; +} + static const struct spinand_info winbond_spinand_table[] = { /* 512M-bit densities */ SPINAND_INFO("W25N512GW", /* 1.8V */ @@ -268,7 +307,8 @@ static const struct spinand_info winbond_spinand_table[] = { &write_cache_variants, &update_cache_variants), 0, - SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)), + SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL), + SPINAND_CONFIGURE_CHIP(w25n0xjw_hs_cfg)), SPINAND_INFO("W25N01KV", /* 3.3V */ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xae, 0x21), NAND_MEMORG(1, 2048, 96, 64, 1024, 20, 1, 1, 1), @@ -324,7 +364,8 @@ static const struct spinand_info winbond_spinand_table[] = { &write_cache_variants, &update_cache_variants), 0, - SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)), + SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL), + SPINAND_CONFIGURE_CHIP(w25n0xjw_hs_cfg)), SPINAND_INFO("W25N02KV", /* 3.3V */ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x22), NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1), diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h index 69674fd191d9d..53c881e41fc7e 100644 --- a/include/linux/mtd/spinand.h +++ b/include/linux/mtd/spinand.h @@ -739,6 +739,7 @@ int spinand_match_and_init(struct spinand_device *spinand, enum spinand_readid_method rdid_method); int spinand_upd_cfg(struct spinand_device *spinand, u8 mask, u8 val); +int spinand_read_reg_op(struct spinand_device *spinand, u8 reg, u8 *val); int spinand_write_reg_op(struct spinand_device *spinand, u8 reg, u8 val); int spinand_select_target(struct spinand_device *spinand, unsigned int target);