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| author | Chao Fu <B44548@freescale.com> | 2014-09-28 02:37:51 (GMT) |
|---|---|---|
| committer | Matthew Weigel <Matthew.Weigel@freescale.com> | 2014-12-11 18:37:33 (GMT) |
| commit | cb2adaf5cb56c53ed14e1ab872f14e1926049ff9 (patch) | |
| tree | d12686d818f28fc3120280f34ed0c113cd4d1f8d /drivers/mtd | |
| parent | 58bb64ef5ae667aad702dabd6929b56c9a5c0ed2 (diff) | |
| download | linux-fsl-qoriq-cb2adaf5cb56c53ed14e1ab872f14e1926049ff9.tar.xz | |
mtd: fsl-quadspi: add DDR quad read support for Micron
Add DDR quad read opcode and LUT sequence for Micron N25Q256A.
The performace :
=================================================
mtd_speedtest: MTD device: 1
mtd_speedtest: not NAND flash, assume page size is 512 bytes.
mtd_speedtest: MTD device size 33554432, eraseblock size 65536,
page size 512, count of eraseblocks 512, pages per eraseblock 128, OOB size 0
mtd_speedtest: testing eraseblock write speed
mtd_speedtest: eraseblock write speed is 2426 KiB/s
mtd_speedtest: testing eraseblock read speed
mtd_speedtest: eraseblock read speed is 32157 KiB/s
mtd_speedtest: testing page write speed
mtd_speedtest: page write speed is 2362 KiB/s
mtd_speedtest: testing page read speed
mtd_speedtest: page read speed is 17741 KiB/s
mtd_speedtest: testing 2 page write speed
mtd_speedtest: 2 page write speed is 2384 KiB/s
mtd_speedtest: testing 2 page read speed
mtd_speedtest: 2 page read speed is 24058 KiB/s
mtd_speedtest: Testing erase speed
mtd_speedtest: erase speed is 1927529 KiB/s
mtd_speedtest: Testing 2x multi-block erase speed
mtd_speedtest: 2x multi-block erase speed is 2184533 KiB/s
mtd_speedtest: Testing 4x multi-block erase speed
mtd_speedtest: 4x multi-block erase speed is 2184533 KiB/s
mtd_speedtest: Testing 8x multi-block erase speed
mtd_speedtest: 8x multi-block erase speed is 2340571 KiB/s
mtd_speedtest: Testing 16x multi-block erase speed
mtd_speedtest: 16x multi-block erase speed is 2340571 KiB/s
mtd_speedtest: Testing 32x multi-block erase speed
mtd_speedtest: 32x multi-block erase speed is 2340571 KiB/s
mtd_speedtest: Testing 64x multi-block erase speed
mtd_speedtest: 64x multi-block erase speed is 2340571 KiB/s
mtd_speedtest: finished
=================================================
Signed-off-by: Huang Shijie <b32955@freescale.com>
The upstream link of this patch: https://patchwork.kernel.org/patch/4075001/
Change-Id: Ice094cec23114af5cda5dd4b24c3b2e60719fd6a
Reviewed-on: http://git.am.freescale.net:8181/20132
Reviewed-by: Zhengxiong Jin <Jason.Jin@freescale.com>
Tested-by: Zhengxiong Jin <Jason.Jin@freescale.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/spi-nor/fsl-quadspi.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c index ddab7e8..edef8f1 100644 --- a/drivers/mtd/spi-nor/fsl-quadspi.c +++ b/drivers/mtd/spi-nor/fsl-quadspi.c @@ -325,6 +325,18 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q) writel(LUT0(READ_DDR, PAD4, rxfifo) | LUT1(JMP_ON_CS, PAD1, 0), base + QUADSPI_LUT(lut_base + 2)); + } else if (op == SPINOR_OP_READ_1_1_4_D) { + /* read mode : 1-1-4, such as Micron N25Q256A. */ + writel(LUT0(CMD, PAD1, op) + | LUT1(ADDR_DDR, PAD1, addrlen), + base + QUADSPI_LUT(lut_base)); + + writel(LUT0(DUMMY, PAD1, dm) + | LUT1(READ_DDR, PAD4, rxfifo), + base + QUADSPI_LUT(lut_base + 1)); + + writel(LUT0(JMP_ON_CS, PAD1, 0), + base + QUADSPI_LUT(lut_base + 2)); } else { dev_err(nor->dev, "Unsupported opcode : 0x%.2x\n", op); } @@ -389,6 +401,7 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q) static int fsl_qspi_get_seqid(struct fsl_qspi *q, u8 cmd) { switch (cmd) { + case SPINOR_OP_READ_1_1_4_D: case SPINOR_OP_READ_1_4_4_D: case SPINOR_OP_READ4_1_4_4_D: case SPINOR_OP_READ4_1_1_4: |