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sf: Add CONFIG_SF_DUAL_FLASH

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This config will use for defining greater than single flash support.
currently - DUAL_STACKED and DUAL_PARALLEL.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
This commit is contained in:
Jagannadha Sutradharudu Teki 2014-01-11 15:25:04 +05:30
parent 056fbc73d5
commit b902e07cea
4 changed files with 20 additions and 5 deletions
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6
README
View file

@ -2756,6 +2756,12 @@ CBFS (Coreboot Filesystem) support
Define this option to use the Bank addr/Extended addr
support on SPI flashes which has size > 16Mbytes.
CONFIG_SF_DUAL_FLASH Dual flash memories
Define this option to use dual flash support where two flash
memories can be connected with a given cs line.
currently Xilinx Zynq qspi support these type of connections.
- SystemACE Support:
CONFIG_SYSTEMACE

3
drivers/mtd/spi/sf.c
View file

@ -18,9 +18,10 @@ static int spi_flash_read_write(struct spi_slave *spi,
unsigned long flags = SPI_XFER_BEGIN;
int ret;
#ifdef CONFIG_SF_DUAL_FLASH
if (spi->flags & SPI_XFER_U_PAGE)
flags |= SPI_XFER_U_PAGE;
#endif
if (data_len == 0)
flags |= SPI_XFER_END;

14
drivers/mtd/spi/sf_ops.c
View file

@ -131,6 +131,7 @@ static int spi_flash_bank(struct spi_flash *flash, u32 offset)
}
#endif
#ifdef CONFIG_SF_DUAL_FLASH
static void spi_flash_dual_flash(struct spi_flash *flash, u32 *addr)
{
switch (flash->dual_flash) {
@ -150,6 +151,7 @@ static void spi_flash_dual_flash(struct spi_flash *flash, u32 *addr)
break;
}
}
#endif
int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
{
@ -167,9 +169,10 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
check_status = poll_bit;
}
#ifdef CONFIG_SF_DUAL_FLASH
if (spi->flags & SPI_XFER_U_PAGE)
flags |= SPI_XFER_U_PAGE;
#endif
ret = spi_xfer(spi, 8, &cmd, NULL, flags);
if (ret) {
debug("SF: fail to read %s status register\n",
@ -257,9 +260,10 @@ int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len)
while (len) {
erase_addr = offset;
#ifdef CONFIG_SF_DUAL_FLASH
if (flash->dual_flash > SF_SINGLE_FLASH)
spi_flash_dual_flash(flash, &erase_addr);
#endif
#ifdef CONFIG_SPI_FLASH_BAR
ret = spi_flash_bank(flash, erase_addr);
if (ret < 0)
@ -298,9 +302,10 @@ int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset,
for (actual = 0; actual < len; actual += chunk_len) {
write_addr = offset;
#ifdef CONFIG_SF_DUAL_FLASH
if (flash->dual_flash > SF_SINGLE_FLASH)
spi_flash_dual_flash(flash, &write_addr);
#endif
#ifdef CONFIG_SPI_FLASH_BAR
ret = spi_flash_bank(flash, write_addr);
if (ret < 0)
@ -383,9 +388,10 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
while (len) {
read_addr = offset;
#ifdef CONFIG_SF_DUAL_FLASH
if (flash->dual_flash > SF_SINGLE_FLASH)
spi_flash_dual_flash(flash, &read_addr);
#endif
#ifdef CONFIG_SPI_FLASH_BAR
bank_sel = spi_flash_bank(flash, read_addr);
if (bank_sel < 0)

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

@ -150,8 +150,10 @@ static struct spi_flash *spi_flash_validate_params(struct spi_slave *spi,
flash->page_size = ((ext_jedec == 0x4d00) ? 512 : 256) << flash->shift;
flash->sector_size = params->sector_size << flash->shift;
flash->size = flash->sector_size * params->nr_sectors << flash->shift;
#ifdef CONFIG_SF_DUAL_FLASH
if (flash->dual_flash & SF_DUAL_STACKED_FLASH)
flash->size <<= 1;
#endif
/* Compute erase sector and command */
if (params->flags & SECT_4K) {