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NAND write data page refactoring. 

Refactored the write page raw function into two new functions
for writing data to a NAND device and then another function to
finish up a write to a NAND device.  This includes some new
updates to introduce more error checking to existing code.

[dbrownell@users.sourceforge.net: fix fault handling, whitespace]

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
__archive__
Dean Glazeski 2009-12-17 21:02:40 -06:00 committed by David Brownell
parent b8b4bb0745
commit ef4fbd36d4
2 changed files with 72 additions and 62 deletions
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130
src/flash/nand/core.c
View File

@ -675,7 +675,9 @@ static int nand_write_plain(struct nand_device *nand, uint32_t address, uint8_t
}
#endif
int nand_write_page(struct nand_device *nand, uint32_t page, uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size)
int nand_write_page(struct nand_device *nand, uint32_t page,
uint8_t *data, uint32_t data_size,
uint8_t *oob, uint32_t oob_size)
{
uint32_t block;
@ -808,66 +810,41 @@ int nand_read_page_raw(struct nand_device *nand, uint32_t page,
return ERROR_OK;
}
int nand_write_page_raw(struct nand_device *nand, uint32_t page, uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size)
int nand_write_data_page(struct nand_device *nand, uint8_t *data, uint32_t size)
{
int retval = ERROR_NAND_NO_BUFFER;
if (nand->controller->write_block_data != NULL)
retval = (nand->controller->write_block_data)(nand, data, size);
if (ERROR_NAND_NO_BUFFER == retval) {
bool is16bit = nand->device->options & NAND_BUSWIDTH_16;
uint32_t incr = is16bit ? 2 : 1;
uint16_t write_data;
uint32_t i;
for (i = 0; i < size; i += incr) {
if (is16bit)
write_data = le_to_h_u16(data);
else
write_data = *data;
retval = nand->controller->write_data(nand, write_data);
if (ERROR_OK != retval)
break;
data += incr;
}
}
return retval;
}
int nand_write_finish(struct nand_device *nand)
{
uint32_t i;
int retval;
uint8_t status;
retval = nand_page_command(nand, page, NAND_CMD_SEQIN, !data);
if (ERROR_OK != retval)
return retval;
if (data)
{
if (nand->controller->write_block_data != NULL)
(nand->controller->write_block_data)(nand, data, data_size);
else
{
for (i = 0; i < data_size;)
{
if (nand->device->options & NAND_BUSWIDTH_16)
{
uint16_t data_buf = le_to_h_u16(data);
nand->controller->write_data(nand, data_buf);
data += 2;
i += 2;
}
else
{
nand->controller->write_data(nand, *data);
data += 1;
i += 1;
}
}
}
}
if (oob)
{
if (nand->controller->write_block_data != NULL)
(nand->controller->write_block_data)(nand, oob, oob_size);
else
{
for (i = 0; i < oob_size;)
{
if (nand->device->options & NAND_BUSWIDTH_16)
{
uint16_t oob_buf = le_to_h_u16(data);
nand->controller->write_data(nand, oob_buf);
oob += 2;
i += 2;
}
else
{
nand->controller->write_data(nand, *oob);
oob += 1;
i += 1;
}
}
}
}
nand->controller->command(nand, NAND_CMD_PAGEPROG);
retval = nand->controller->nand_ready ?
@ -876,18 +853,47 @@ int nand_write_page_raw(struct nand_device *nand, uint32_t page, uint8_t *data,
if (!retval)
return ERROR_NAND_OPERATION_TIMEOUT;
if ((retval = nand_read_status(nand, &status)) != ERROR_OK)
{
retval = nand_read_status(nand, &status);
if (ERROR_OK != retval) {
LOG_ERROR("couldn't read status");
return ERROR_NAND_OPERATION_FAILED;
}
if (status & NAND_STATUS_FAIL)
{
LOG_ERROR("write operation didn't pass, status: 0x%2.2x", status);
if (status & NAND_STATUS_FAIL) {
LOG_ERROR("write operation didn't pass, status: 0x%2.2x",
status);
return ERROR_NAND_OPERATION_FAILED;
}
return ERROR_OK;
}
int nand_write_page_raw(struct nand_device *nand, uint32_t page,
uint8_t *data, uint32_t data_size,
uint8_t *oob, uint32_t oob_size)
{
int retval;
retval = nand_page_command(nand, page, NAND_CMD_SEQIN, !data);
if (ERROR_OK != retval)
return retval;
if (data) {
retval = nand_write_data_page(nand, data, data_size);
if (ERROR_OK != retval) {
LOG_ERROR("Unable to write data to NAND device");
return retval;
}
}
if (oob) {
retval = nand_write_data_page(nand, oob, oob_size);
if (ERROR_OK != retval) {
LOG_ERROR("Unable to write OOB data to NAND device");
return retval;
}
}
return nand_write_finish(nand);
}

4
src/flash/nand/core.h
View File

@ -212,6 +212,10 @@ int nand_page_command(struct nand_device *nand, uint32_t page,
uint8_t cmd, bool oob_only);
int nand_read_data_page(struct nand_device *nand, uint8_t *data, uint32_t size);
int nand_write_data_page(struct nand_device *nand,
uint8_t *data, uint32_t size);
int nand_write_finish(struct nand_device *nand);
int nand_read_page_raw(struct nand_device *nand, uint32_t page,
uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size);