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- --- a/drivers/mtd/spi-nor/spi-nor.c
- +++ b/drivers/mtd/spi-nor/spi-nor.c
- @@ -565,14 +565,14 @@ static const struct spi_device_id spi_no
- { "mx66l1g55g", INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },
-
- /* Micron */
- - { "n25q032", INFO(0x20ba16, 0, 64 * 1024, 64, 0) },
- - { "n25q064", INFO(0x20ba17, 0, 64 * 1024, 128, 0) },
- - { "n25q128a11", INFO(0x20bb18, 0, 64 * 1024, 256, 0) },
- - { "n25q128a13", INFO(0x20ba18, 0, 64 * 1024, 256, 0) },
- - { "n25q256a", INFO(0x20ba19, 0, 64 * 1024, 512, SECT_4K) },
- - { "n25q512a", INFO(0x20bb20, 0, 64 * 1024, 1024, SECT_4K) },
- - { "n25q512ax3", INFO(0x20ba20, 0, 64 * 1024, 1024, USE_FSR) },
- - { "n25q00", INFO(0x20ba21, 0, 64 * 1024, 2048, USE_FSR) },
- + { "n25q032", INFO(0x20ba16, 0, 64 * 1024, 64, SPI_NOR_QUAD_READ) },
- + { "n25q064", INFO(0x20ba17, 0, 64 * 1024, 128, SPI_NOR_QUAD_READ) },
- + { "n25q128a11", INFO(0x20bb18, 0, 64 * 1024, 256, SPI_NOR_QUAD_READ) },
- + { "n25q128a13", INFO(0x20ba18, 0, 64 * 1024, 256, SPI_NOR_QUAD_READ) },
- + { "n25q256a", INFO(0x20ba19, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_QUAD_READ) },
- + { "n25q512a", INFO(0x20bb20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
- + { "n25q512ax3", INFO(0x20ba20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
- + { "n25q00", INFO(0x20ba21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
-
- /* PMC */
- { "pm25lv512", INFO(0, 0, 32 * 1024, 2, SECT_4K_PMC) },
- @@ -903,6 +903,45 @@ static int spansion_quad_enable(struct s
- return 0;
- }
-
- +static int micron_quad_enable(struct spi_nor *nor)
- +{
- + int ret;
- + u8 val;
- +
- + ret = nor->read_reg(nor, SPINOR_OP_RD_EVCR, &val, 1);
- + if (ret < 0) {
- + dev_err(nor->dev, "error %d reading EVCR\n", ret);
- + return ret;
- + }
- +
- + write_enable(nor);
- +
- + /* set EVCR, enable quad I/O */
- + nor->cmd_buf[0] = val & ~EVCR_QUAD_EN_MICRON;
- + ret = nor->write_reg(nor, SPINOR_OP_WD_EVCR, nor->cmd_buf, 1, 0);
- + if (ret < 0) {
- + dev_err(nor->dev, "error while writing EVCR register\n");
- + return ret;
- + }
- +
- + ret = spi_nor_wait_till_ready(nor);
- + if (ret)
- + return ret;
- +
- + /* read EVCR and check it */
- + ret = nor->read_reg(nor, SPINOR_OP_RD_EVCR, &val, 1);
- + if (ret < 0) {
- + dev_err(nor->dev, "error %d reading EVCR\n", ret);
- + return ret;
- + }
- + if (val & EVCR_QUAD_EN_MICRON) {
- + dev_err(nor->dev, "Micron EVCR Quad bit not clear\n");
- + return -EINVAL;
- + }
- +
- + return 0;
- +}
- +
- static int set_quad_mode(struct spi_nor *nor, struct flash_info *info)
- {
- int status;
- @@ -915,6 +954,13 @@ static int set_quad_mode(struct spi_nor
- return -EINVAL;
- }
- return status;
- + case CFI_MFR_ST:
- + status = micron_quad_enable(nor);
- + if (status) {
- + dev_err(nor->dev, "Micron quad-read not enabled\n");
- + return -EINVAL;
- + }
- + return status;
- default:
- status = spansion_quad_enable(nor);
- if (status) {
- --- a/include/linux/mtd/spi-nor.h
- +++ b/include/linux/mtd/spi-nor.h
- @@ -56,6 +56,10 @@
- /* Used for Spansion flashes only. */
- #define SPINOR_OP_BRWR 0x17 /* Bank register write */
-
- +/* Used for Micron flashes only. */
- +#define SPINOR_OP_RD_EVCR 0x65 /* Read EVCR register */
- +#define SPINOR_OP_WD_EVCR 0x61 /* Write EVCR register */
- +
- /* Status Register bits. */
- #define SR_WIP 1 /* Write in progress */
- #define SR_WEL 2 /* Write enable latch */
- @@ -67,6 +71,9 @@
-
- #define SR_QUAD_EN_MX 0x40 /* Macronix Quad I/O */
-
- +/* Enhanced Volatile Configuration Register bits */
- +#define EVCR_QUAD_EN_MICRON 0x80 /* Micron Quad I/O */
- +
- /* Flag Status Register bits */
- #define FSR_READY 0x80
-
|
