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sf: Add QUAD_IO_FAST read support

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This patch adds support QUAD_IO_FAST read command.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
This commit is contained in:
Jagannadha Sutradharudu Teki 2013-12-24 15:24:31 +05:30
parent 33adfb5f9b
commit c4ba0d82d3
4 changed files with 8 additions and 2 deletions
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1
drivers/mtd/spi/sf_internal.h
View file

@ -45,6 +45,7 @@
#define CMD_READ_DUAL_OUTPUT_FAST 0x3b
#define CMD_READ_DUAL_IO_FAST 0xbb
#define CMD_READ_QUAD_OUTPUT_FAST 0x6b
#define CMD_READ_QUAD_IO_FAST 0xeb
#define CMD_READ_ID 0x9f
/* Bank addr access commands */

2
drivers/mtd/spi/sf_probe.c
View file

@ -25,6 +25,7 @@ static u8 spi_read_cmds_array[] = {
CMD_READ_DUAL_OUTPUT_FAST,
CMD_READ_DUAL_IO_FAST,
CMD_READ_QUAD_OUTPUT_FAST,
CMD_READ_QUAD_IO_FAST,
};
static int spi_flash_set_qeb(struct spi_flash *flash, u8 idcode0)
@ -131,6 +132,7 @@ static struct spi_flash *spi_flash_validate_params(struct spi_slave *spi,
/* Set the quad enable bit - only for quad commands */
if ((flash->read_cmd == CMD_READ_QUAD_OUTPUT_FAST) ||
(flash->read_cmd == CMD_READ_QUAD_IO_FAST) ||
(flash->write_cmd == CMD_QUAD_PAGE_PROGRAM)) {
if (spi_flash_set_qeb(flash, idcode[0])) {
debug("SF: Fail to set QEB for %02x\n", idcode[0]);

4
include/spi.h
View file

@ -39,8 +39,10 @@
#define SPI_OPM_RX_DOUT 1 << 1
#define SPI_OPM_RX_DIO 1 << 2
#define SPI_OPM_RX_QOF 1 << 3
#define SPI_OPM_RX_QIOF 1 << 4
#define SPI_OPM_RX_EXTN SPI_OPM_RX_AS | SPI_OPM_RX_DOUT | \
SPI_OPM_RX_DIO | SPI_OPM_RX_QOF
SPI_OPM_RX_DIO | SPI_OPM_RX_QOF | \
SPI_OPM_RX_QIOF
/* Header byte that marks the start of the message */
#define SPI_PREAMBLE_END_BYTE 0xec

3
include/spi_flash.h
View file

@ -28,9 +28,10 @@ enum spi_read_cmds {
DUAL_OUTPUT_FAST = 1 << 1,
DUAL_IO_FAST = 1 << 2,
QUAD_OUTPUT_FAST = 1 << 3,
QUAD_IO_FAST = 1 << 4,
};
#define RD_EXTN ARRAY_SLOW | DUAL_OUTPUT_FAST | DUAL_IO_FAST
#define RD_FULL RD_EXTN | QUAD_OUTPUT_FAST
#define RD_FULL RD_EXTN | QUAD_OUTPUT_FAST | QUAD_IO_FAST
/**
* struct spi_flash_params - SPI/QSPI flash device params structure