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Use BOARD_EEPROM_WP_CTRL signal to control EEPROM WP signal if defined

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Erases and write operations will use the BOARD_EEPROM_WP_CTRL
  macro to remove the Write protection and restore it.
This commit is contained in:
David Sidrane 2017-01-19 14:00:23 -10:00 committed by Lorenz Meier
parent 44cb1afa4d
commit 487fbdf009
1 changed files with 11 additions and 0 deletions
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11
src/systemcmds/mtd/24xxxx_mtd.c
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@ -203,6 +203,8 @@ static int at24c_eraseall(FAR struct at24c_dev_s *priv)
memset(&buf[2], 0xff, priv->pagesize);
BOARD_EEPROM_WP_CTRL(false);
for (startblock = 0; startblock < priv->npages; startblock++) {
uint16_t offset = startblock * priv->pagesize;
buf[1] = offset & 0xff;
@ -214,6 +216,8 @@ static int at24c_eraseall(FAR struct at24c_dev_s *priv)
}
}
BOARD_EEPROM_WP_CTRL(true);
return OK;
}
@ -389,6 +393,8 @@ static ssize_t at24c_bwrite(FAR struct mtd_dev_s *dev, off_t startblock, size_t
finfo("startblock: %08lx nblocks: %d\n", (long)startblock, (int)nblocks);
BOARD_EEPROM_WP_CTRL(false);
while (blocksleft-- > 0) {
uint16_t offset = startblock * priv->pagesize;
unsigned tries = CONFIG_AT24XX_WRITE_TIMEOUT_MS;
@ -415,6 +421,7 @@ static ssize_t at24c_bwrite(FAR struct mtd_dev_s *dev, off_t startblock, size_t
*/
if (--tries == 0) {
perf_count(priv->perf_errors);
BOARD_EEPROM_WP_CTRL(true);
return ERROR;
}
}
@ -423,6 +430,8 @@ static ssize_t at24c_bwrite(FAR struct mtd_dev_s *dev, off_t startblock, size_t
buffer += priv->pagesize;
}
BOARD_EEPROM_WP_CTRL(true);
#if CONFIG_AT24XX_MTD_BLOCKSIZE > AT24XX_PAGESIZE
return nblocks / (CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE);
#else
@ -565,6 +574,8 @@ FAR struct mtd_dev_s *at24c_initialize(FAR struct i2c_master_s *dev)
}
};
BOARD_EEPROM_WP_CTRL(true);
perf_begin(priv->perf_transfers);
int ret = I2C_TRANSFER(priv->dev, &msgv[0], 2);
perf_end(priv->perf_transfers);