From acfc6e9b34b3b3ca0d8bbe366dd08b0fac21c740 Mon Sep 17 00:00:00 2001 From: Yunhui Cui Date: Tue, 2 Feb 2016 12:21:12 +0800 Subject: [PATCH 101/113] mtd: spi-nor: fsl-quadspi: extend support for some special requerment. Add extra info in LUT table to support some special requerments. Spansion S25FS-S family flash need some special operations. Signed-off-by: Yunhui Cui --- drivers/mtd/spi-nor/fsl-quadspi.c | 44 +++++++++++++++++++++++++++++++++++-- include/linux/mtd/spi-nor.h | 4 ++++ 2 files changed, 46 insertions(+), 2 deletions(-) --- a/drivers/mtd/spi-nor/fsl-quadspi.c +++ b/drivers/mtd/spi-nor/fsl-quadspi.c @@ -205,6 +205,9 @@ #define SEQID_RDCR 9 #define SEQID_EN4B 10 #define SEQID_BRWR 11 +#define SEQID_RDAR 12 +#define SEQID_WRAR 13 + #define QUADSPI_MIN_IOMAP SZ_4M @@ -470,6 +473,28 @@ static void fsl_qspi_init_lut(struct fsl qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_BRWR), base + QUADSPI_LUT(lut_base)); + /* + * Read any device register. + * Used for Spansion S25FS-S family flash only. + */ + lut_base = SEQID_RDAR * 4; + qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_SPANSION_RDAR) | + LUT1(ADDR, PAD1, ADDR24BIT), + base + QUADSPI_LUT(lut_base)); + qspi_writel(q, LUT0(DUMMY, PAD1, 8) | LUT1(FSL_READ, PAD1, 1), + base + QUADSPI_LUT(lut_base + 1)); + + /* + * Write any device register. + * Used for Spansion S25FS-S family flash only. + */ + lut_base = SEQID_WRAR * 4; + qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_SPANSION_WRAR) | + LUT1(ADDR, PAD1, ADDR24BIT), + base + QUADSPI_LUT(lut_base)); + qspi_writel(q, LUT0(FSL_WRITE, PAD1, 1), + base + QUADSPI_LUT(lut_base + 1)); + fsl_qspi_lock_lut(q); } @@ -477,9 +502,15 @@ static void fsl_qspi_init_lut(struct fsl static int fsl_qspi_get_seqid(struct fsl_qspi *q, u8 cmd) { switch (cmd) { + case SPINOR_OP_READ4_1_1_4: case SPINOR_OP_READ_1_1_4: case SPINOR_OP_READ_FAST: + case SPINOR_OP_READ4_FAST: return SEQID_READ; + case SPINOR_OP_SPANSION_RDAR: + return SEQID_RDAR; + case SPINOR_OP_SPANSION_WRAR: + return SEQID_WRAR; case SPINOR_OP_WREN: return SEQID_WREN; case SPINOR_OP_WRDI: @@ -491,6 +522,7 @@ static int fsl_qspi_get_seqid(struct fsl case SPINOR_OP_CHIP_ERASE: return SEQID_CHIP_ERASE; case SPINOR_OP_PP: + case SPINOR_OP_PP_4B: return SEQID_PP; case SPINOR_OP_RDID: return SEQID_RDID; @@ -830,8 +862,12 @@ static int fsl_qspi_read_reg(struct spi_ { int ret; struct fsl_qspi *q = nor->priv; + u32 to = 0; + + if (opcode == SPINOR_OP_SPANSION_RDAR) + memcpy(&to, nor->cmd_buf, 4); - ret = fsl_qspi_runcmd(q, opcode, 0, len); + ret = fsl_qspi_runcmd(q, opcode, to, len); if (ret) return ret; @@ -843,9 +879,13 @@ static int fsl_qspi_write_reg(struct spi { struct fsl_qspi *q = nor->priv; int ret; + u32 to = 0; + + if (opcode == SPINOR_OP_SPANSION_WRAR) + memcpy(&to, nor->cmd_buf, 4); if (!buf) { - ret = fsl_qspi_runcmd(q, opcode, 0, 1); + ret = fsl_qspi_runcmd(q, opcode, to, 1); if (ret) return ret; --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -74,6 +74,10 @@ /* Used for Spansion flashes only. */ #define SPINOR_OP_BRWR 0x17 /* Bank register write */ +/* Used for Spansion S25FS-S family flash only. */ +#define SPINOR_OP_SPANSION_RDAR 0x65 /* Read any device register */ +#define SPINOR_OP_SPANSION_WRAR 0x71 /* Write any device register */ + /* Used for Micron flashes only. */ #define SPINOR_OP_RD_EVCR 0x65 /* Read EVCR register */ #define SPINOR_OP_WD_EVCR 0x61 /* Write EVCR register */