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sf: probe: Simply the BAR configuration logic

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Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
This commit is contained in:
Jagannadha Sutradharudu Teki 2013-09-26 14:24:58 +05:30
parent 0f6232801c
commit 32ebd1a7d5
2 changed files with 22 additions and 56 deletions
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8
drivers/mtd/spi/spi_flash_internal.h
View File

@ -31,11 +31,6 @@
#define SPI_FLASH_16MB_BOUN 0x1000000
/* Manufacture ID's */
#define SPI_FLASH_SPANSION_IDCODE0 0x01
#define SPI_FLASH_STMICRO_IDCODE0 0x20
#define SPI_FLASH_WINBOND_IDCODE0 0xef
#ifdef CONFIG_SPI_FLASH_BAR
/* Bank addr access commands */
# define CMD_BANKADDR_BRWR 0x17
@ -102,9 +97,6 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr);
#ifdef CONFIG_SPI_FLASH_BAR
/* Program the bank address register */
int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel);
/* Configure the BAR - discover the bank cmds */
int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0);
#endif
/*

70
drivers/mtd/spi/spi_flash_probe.c
View File

@ -221,6 +221,26 @@ struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode)
flash->poll_cmd = CMD_FLAG_STATUS;
#endif
#ifdef CONFIG_SPI_FLASH_BAR
/* Configure the BAR - discover bank cmds and read current bank */
u8 curr_bank = 0;
if (flash->size > SPI_FLASH_16MB_BOUN) {
flash->bank_read_cmd = (idcode[0] == 0x01) ?
CMD_BANKADDR_BRRD : CMD_EXTNADDR_RDEAR;
flash->bank_write_cmd = (idcode[0] == 0x01) ?
CMD_BANKADDR_BRWR : CMD_EXTNADDR_WREAR;
if (spi_flash_read_common(flash, &flash->bank_read_cmd, 1,
&curr_bank, 1)) {
debug("SF: fail to read bank addr register\n");
return NULL;
}
flash->bank_curr = curr_bank;
} else {
flash->bank_curr = curr_bank;
}
#endif
/* Flash powers up read-only, so clear BP# bits */
#if defined(CONFIG_SPI_FLASH_ATMEL) || \
defined(CONFIG_SPI_FLASH_MACRONIX) || \
@ -231,44 +251,6 @@ struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode)
return flash;
}
#ifdef CONFIG_SPI_FLASH_BAR
int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0)
{
u8 cmd;
u8 curr_bank = 0;
/* discover bank cmds */
switch (idcode0) {
case SPI_FLASH_SPANSION_IDCODE0:
flash->bank_read_cmd = CMD_BANKADDR_BRRD;
flash->bank_write_cmd = CMD_BANKADDR_BRWR;
break;
case SPI_FLASH_STMICRO_IDCODE0:
case SPI_FLASH_WINBOND_IDCODE0:
flash->bank_read_cmd = CMD_EXTNADDR_RDEAR;
flash->bank_write_cmd = CMD_EXTNADDR_WREAR;
break;
default:
printf("SF: Unsupported bank commands %02x\n", idcode0);
return -1;
}
/* read the bank reg - on which bank the flash is in currently */
cmd = flash->bank_read_cmd;
if (flash->size > SPI_FLASH_16MB_BOUN) {
if (spi_flash_read_common(flash, &cmd, 1, &curr_bank, 1)) {
debug("SF: fail to read bank addr register\n");
return -1;
}
flash->bank_curr = curr_bank;
} else {
flash->bank_curr = curr_bank;
}
return 0;
}
#endif
#ifdef CONFIG_OF_CONTROL
int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
{
@ -302,7 +284,7 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
{
struct spi_slave *spi;
struct spi_flash *flash = NULL;
u8 idcode[5], *idp;
u8 idcode[5];
int ret;
/* Setup spi_slave */
@ -332,18 +314,10 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
#endif
/* Validate ID's from flash dev table */
idp = idcode;
flash = spi_flash_validate_ids(spi, idp);
flash = spi_flash_validate_ids(spi, idcode);
if (!flash)
goto err_read_id;
#ifdef CONFIG_SPI_FLASH_BAR
/* Configure the BAR - discover bank cmds and read current bank */
ret = spi_flash_bank_config(flash, *idp);
if (ret < 0)
goto err_read_id;
#endif
#ifdef CONFIG_OF_CONTROL
if (spi_flash_decode_fdt(gd->fdt_blob, flash)) {
debug("SF: FDT decode error\n");