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SAM4E-EK: Add support for the SAM4E-EK AT25 serial flash

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This commit is contained in:
Gregory Nutt
2014-03-13 14:07:35 -06:00
parent 7e16cee6b5
commit 42e06fb503
12 changed files with 558 additions and 214 deletions
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drivers/mtd/at25.c
+15 -9
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@@ -100,10 +100,16 @@
/* Status register bit definitions */
#define AT25_SR_WIP (1 << 0) /* Bit 0: Write in progress bit */
#define AT25_SR_WEL (1 << 1) /* Bit 1: Write enable latch bit */
#define AT25_SR_EPE (1 << 5) /* Bit 5: Erase/program error */
#define AT25_SR_UNPROT 0x00 /* Global unprotect command */
#define AT25_SR_BUSY (1 << 0) /* Bit 0: Ready/Busy Status */
#define AT25_SR_WEL (1 << 1) /* Bit 1: Write enable latch bit */
#define AT25_SR_SWP_SHIFT (2) /* Bits 2-3: Software protection */
#define AT25_SR_SWP_MASK (3 << AT25_SR_SWP_SHIFT)
#define AT25_SR_WPP (1 << 4) /* Bit 4: Write Protect (/WP) Pin Status */
#define AT25_SR_EPE (1 << 5) /* Bit 5: Erase/program error */
/* Bit 6: Reserved */
#define AT25_SR_SPRL (1 << 7) /* Bit 7: Sector Protection Registers Locked */
#define AT25_SR_UNPROT 0x00 /* Global unprotect command */
#define AT25_DUMMY 0xa5
@@ -269,7 +275,7 @@ static void at25_waitwritecomplete(struct at25_dev_s *priv)
status = SPI_SEND(priv->dev, AT25_DUMMY);
}
while ((status & AT25_SR_WIP) != 0);
while ((status & AT25_SR_BUSY) != 0);
/* Deselect the FLASH */
@@ -302,19 +308,19 @@ static void at25_waitwritecomplete(struct at25_dev_s *priv)
* other peripherals to access the SPI bus.
*/
if ((status & AT25_SR_WIP) != 0)
if ((status & AT25_SR_BUSY) != 0)
{
at25_unlock(priv->dev);
usleep(10000);
at25_lock(priv->dev);
}
}
while ((status & AT25_SR_WIP) != 0);
while ((status & AT25_SR_BUSY) != 0);
#endif
if (status & AT25_SR_EPE)
{
fdbg("Write error, status: 0x%02x\n", status);
fdbg("ERROR: Write error, status: 0x%02x\n", status);
}
fvdbg("Complete, status: 0x%02x\n", status);
@@ -693,7 +699,7 @@ FAR struct mtd_dev_s *at25_initialize(FAR struct spi_dev_s *dev)
{
/* Unrecognized! Discard all of that work we just did and return NULL */
fdbg("Unrecognized\n");
fdbg("ERROR: Unrecognized\n");
kfree(priv);
priv = NULL;
}