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sf: Add macronix set QEB support

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This patch adds set QEB support for macronix flash devices
which are trying to program/read quad operations.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
This commit is contained in:
Jagannadha Sutradharudu Teki 2013-12-26 14:13:36 +05:30
parent ff063ed480
commit 067951223e
3 changed files with 35 additions and 0 deletions
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5
drivers/mtd/spi/sf_internal.h
View File

@ -17,6 +17,7 @@
/* CFI Manufacture ID's */
#define SPI_FLASH_CFI_MFR_SPANSION 0x01
#define SPI_FLASH_CFI_MFR_STMICRO 0x20
#define SPI_FLASH_CFI_MFR_MACRONIX 0xc2
#define SPI_FLASH_CFI_MFR_WINBOND 0xef
/* SECT flags */
@ -61,6 +62,7 @@
/* Common status */
#define STATUS_WIP 0x01
#define STATUS_QEB_WINSPAN (1 << 1)
#define STATUS_QEB_MXIC (1 << 6)
#define STATUS_PEC 0x80
/* Flash timeout values */
@ -102,6 +104,9 @@ int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len);
/* Program the status register */
int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr);
/* Set quad enbale bit for macronix flashes */
int spi_flash_set_qeb_mxic(struct spi_flash *flash);
/* Set quad enbale bit for winbond and spansion flashes */
int spi_flash_set_qeb_winspan(struct spi_flash *flash);

26
drivers/mtd/spi/sf_ops.c
View File

@ -39,6 +39,32 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
return 0;
}
#ifdef CONFIG_SPI_FLASH_MACRONIX
int spi_flash_set_qeb_mxic(struct spi_flash *flash)
{
u8 qeb_status;
u8 cmd;
int ret;
cmd = CMD_READ_STATUS;
ret = spi_flash_read_common(flash, &cmd, 1, &qeb_status, 1);
if (ret < 0) {
debug("SF: fail to read status register\n");
return ret;
}
if (qeb_status & STATUS_QEB_MXIC) {
debug("SF: Quad enable bit is already set\n");
} else {
ret = spi_flash_cmd_write_status(flash, STATUS_QEB_MXIC);
if (ret < 0)
return ret;
}
return ret;
}
#endif
#if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND)
static int spi_flash_cmd_write_config(struct spi_flash *flash, u8 cr)
{

4
drivers/mtd/spi/sf_probe.c
View File

@ -31,6 +31,10 @@ static u8 spi_read_cmds_array[] = {
static int spi_flash_set_qeb(struct spi_flash *flash, u8 idcode0)
{
switch (idcode0) {
#ifdef CONFIG_SPI_FLASH_MACRONIX
case SPI_FLASH_CFI_MFR_MACRONIX:
return spi_flash_set_qeb_mxic(flash);
#endif
#if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND)
case SPI_FLASH_CFI_MFR_SPANSION:
case SPI_FLASH_CFI_MFR_WINBOND: