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sf: unify read/write helpers 

These functions largely do the same exact thing, so unify them all
into one basic function.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2011-01-10 02:20:11 -05:00 committed by Wolfgang Denk
parent 17e967b3df
commit 000044d8bf
1 changed files with 19 additions and 48 deletions
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67
drivers/mtd/spi/spi_flash.c
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@ -14,77 +14,48 @@
#include "spi_flash_internal.h"
int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
static int spi_flash_read_write(struct spi_slave *spi,
const u8 *cmd, size_t cmd_len,
const u8 *data_out, u8 *data_in,
size_t data_len)
{
unsigned long flags = SPI_XFER_BEGIN;
int ret;
if (len == 0)
if (data_len == 0)
flags |= SPI_XFER_END;
ret = spi_xfer(spi, 8, &cmd, NULL, flags);
ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
if (ret) {
debug("SF: Failed to send command %02x: %d\n", cmd, ret);
return ret;
}
if (len) {
ret = spi_xfer(spi, len * 8, NULL, response, SPI_XFER_END);
debug("SF: Failed to send command (%zu bytes): %d\n",
cmd_len, ret);
} else if (data_len != 0) {
ret = spi_xfer(spi, data_len * 8, data_out, data_in, SPI_XFER_END);
if (ret)
debug("SF: Failed to read response (%zu bytes): %d\n",
len, ret);
debug("SF: Failed to transfer %zu bytes of data: %d\n",
data_len, ret);
}
return ret;
}
int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
{
return spi_flash_cmd_read(spi, &cmd, 1, response, len);
}
int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
size_t cmd_len, void *data, size_t data_len)
{
unsigned long flags = SPI_XFER_BEGIN;
int ret;
if (data_len == 0)
flags |= SPI_XFER_END;
ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
if (ret) {
debug("SF: Failed to send read command (%zu bytes): %d\n",
cmd_len, ret);
} else if (data_len != 0) {
ret = spi_xfer(spi, data_len * 8, NULL, data, SPI_XFER_END);
if (ret)
debug("SF: Failed to read %zu bytes of data: %d\n",
data_len, ret);
}
return ret;
return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
}
int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
const void *data, size_t data_len)
{
unsigned long flags = SPI_XFER_BEGIN;
int ret;
if (data_len == 0)
flags |= SPI_XFER_END;
ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
if (ret) {
debug("SF: Failed to send read command (%zu bytes): %d\n",
cmd_len, ret);
} else if (data_len != 0) {
ret = spi_xfer(spi, data_len * 8, data, NULL, SPI_XFER_END);
if (ret)
debug("SF: Failed to read %zu bytes of data: %d\n",
data_len, ret);
}
return ret;
return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
}
int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
size_t cmd_len, void *data, size_t data_len)
{