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authorTom Rini <trini@ti.com>2013-09-16 20:02:50 -0400
committerTom Rini <trini@ti.com>2013-09-16 20:02:50 -0400
commitbc23d96b75fb9c494390c8af02c473c4f11f7719 (patch)
tree1f20b373eaf8c0d56b6d7d4feb7f285fd988f2c1
parent6856254fc05d67f874d08a534724c842f93a605f (diff)
parentb95f958d7d06b3cd117647b29b288cf168aa2ee9 (diff)
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Merge branch 'master' of git://git.denx.de/u-boot-spi
-rw-r--r--common/cmd_sf.c13
-rw-r--r--drivers/spi/mxs_spi.c12
2 files changed, 15 insertions, 10 deletions
diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index 4af0f0a..3f60979 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -152,8 +152,10 @@ static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
{
debug("offset=%#x, sector_size=%#x, len=%#zx\n",
offset, flash->sector_size, len);
- if (spi_flash_read(flash, offset, len, cmp_buf))
+ /* Read the entire sector so to allow for rewriting */
+ if (spi_flash_read(flash, offset, flash->sector_size, cmp_buf))
return "read";
+ /* Compare only what is meaningful (len) */
if (memcmp(cmp_buf, buf, len) == 0) {
debug("Skip region %x size %zx: no change\n",
offset, len);
@@ -163,8 +165,17 @@ static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
/* Erase the entire sector */
if (spi_flash_erase(flash, offset, flash->sector_size))
return "erase";
+ /* Write the initial part of the block from the source */
if (spi_flash_write(flash, offset, len, buf))
return "write";
+ /* If it's a partial sector, rewrite the existing part */
+ if (len != flash->sector_size) {
+ /* Rewrite the original data to the end of the sector */
+ if (spi_flash_write(flash, offset + len,
+ flash->sector_size - len, &cmp_buf[len]))
+ return "write";
+ }
+
return NULL;
}
diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c
index 3cf7142..2b9f395 100644
--- a/drivers/spi/mxs_spi.c
+++ b/drivers/spi/mxs_spi.c
@@ -56,8 +56,6 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode)
{
struct mxs_spi_slave *mxs_slave;
- struct mxs_ssp_regs *ssp_regs;
- int reg;
if (!spi_cs_is_valid(bus, cs)) {
printf("mxs_spi: invalid bus %d / chip select %d\n", bus, cs);
@@ -74,13 +72,7 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
mxs_slave->max_khz = max_hz / 1000;
mxs_slave->mode = mode;
mxs_slave->regs = mxs_ssp_regs_by_bus(bus);
- ssp_regs = mxs_slave->regs;
- reg = readl(&ssp_regs->hw_ssp_ctrl0);
- reg &= ~(MXS_SSP_CHIPSELECT_MASK);
- reg |= cs << MXS_SSP_CHIPSELECT_SHIFT;
-
- writel(reg, &ssp_regs->hw_ssp_ctrl0);
return &mxs_slave->slave;
err_init:
@@ -102,7 +94,9 @@ int spi_claim_bus(struct spi_slave *slave)
mxs_reset_block(&ssp_regs->hw_ssp_ctrl0_reg);
- writel(SSP_CTRL0_BUS_WIDTH_ONE_BIT, &ssp_regs->hw_ssp_ctrl0);
+ writel((slave->cs << MXS_SSP_CHIPSELECT_SHIFT) |
+ SSP_CTRL0_BUS_WIDTH_ONE_BIT,
+ &ssp_regs->hw_ssp_ctrl0);
reg = SSP_CTRL1_SSP_MODE_SPI | SSP_CTRL1_WORD_LENGTH_EIGHT_BITS;
reg |= (mxs_slave->mode & SPI_CPOL) ? SSP_CTRL1_POLARITY : 0;