diff options
| author | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2014-01-07 00:11:35 +0530 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2014-01-12 21:40:22 +0530 |
| commit | 056fbc73d54df64adcb93c513cba708acb2683bd (patch) | |
| tree | 4243a3f6eb6f1a2fabc57cdad08031fc4e351cd6 /drivers/mtd | |
| parent | f77f469117ab3184ac45683a50dc446265be28cc (diff) | |
| download | talos-obmc-uboot-056fbc73d54df64adcb93c513cba708acb2683bd.tar.gz talos-obmc-uboot-056fbc73d54df64adcb93c513cba708acb2683bd.zip | |
sf: Add dual memories support - DUAL_PARALLEL
This patch added support for accessing dual memories in
parallel connection with single chipselect line from controller.
For more info - see doc/SPI/README.dual-flash
Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/spi/sf_ops.c | 8 | ||||
| -rw-r--r-- | drivers/mtd/spi/sf_probe.c | 11 |
2 files changed, 12 insertions, 7 deletions
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c index e877858a91..843f379ef1 100644 --- a/drivers/mtd/spi/sf_ops.c +++ b/drivers/mtd/spi/sf_ops.c @@ -119,7 +119,7 @@ static int spi_flash_bank(struct spi_flash *flash, u32 offset) u8 bank_sel; int ret; - bank_sel = offset / SPI_FLASH_16MB_BOUN; + bank_sel = offset / (SPI_FLASH_16MB_BOUN << flash->shift); ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); if (ret) { @@ -142,6 +142,9 @@ static void spi_flash_dual_flash(struct spi_flash *flash, u32 *addr) flash->spi->flags &= ~SPI_XFER_U_PAGE; } break; + case SF_DUAL_PARALLEL_FLASH: + *addr >>= flash->shift; + break; default: debug("SF: Unsupported dual_flash=%d\n", flash->dual_flash); break; @@ -388,7 +391,8 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset, if (bank_sel < 0) return ret; #endif - remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1)) - offset; + remain_len = ((SPI_FLASH_16MB_BOUN << flash->shift) * + (bank_sel + 1)) - offset; if (len < remain_len) read_len = len; else diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c index b9e14c5a2b..48de7c1986 100644 --- a/drivers/mtd/spi/sf_probe.c +++ b/drivers/mtd/spi/sf_probe.c @@ -146,19 +146,20 @@ static struct spi_flash *spi_flash_validate_params(struct spi_slave *spi, flash->read = spi_flash_cmd_read_ops; /* Compute the flash size */ - flash->page_size = (ext_jedec == 0x4d00) ? 512 : 256; - flash->sector_size = params->sector_size; - flash->size = flash->sector_size * params->nr_sectors; + flash->shift = (flash->dual_flash & SF_DUAL_PARALLEL_FLASH) ? 1 : 0; + 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; if (flash->dual_flash & SF_DUAL_STACKED_FLASH) flash->size <<= 1; /* Compute erase sector and command */ if (params->flags & SECT_4K) { flash->erase_cmd = CMD_ERASE_4K; - flash->erase_size = 4096; + flash->erase_size = 4096 << flash->shift; } else if (params->flags & SECT_32K) { flash->erase_cmd = CMD_ERASE_32K; - flash->erase_size = 32768; + flash->erase_size = 32768 << flash->shift; } else { flash->erase_cmd = CMD_ERASE_64K; flash->erase_size = flash->sector_size; |
