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add CONFIG_SPI_IDLE_VAL for cf_spi.c to allow use of spi_mmc

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This patch adds CONFIG_SPI_IDLE_VAL to cf_spi.c
The default setting is 0x0 to behave same as current version, in case
CONFIG_SPI_MMC is set, the value is set to 0xFFFF (all ones). In either
case, the value can be overwritten by board configuration.

Signed-off-by: Wolfgang Wegner <w.wegner@astro-kom.de>
Signed-off-by: Andy Fleming <afleming@freescale.com>
This commit is contained in:
Wolfgang Wegner 2010-04-23 05:43:12 +00:00 committed by Andy Fleming
parent ce0fbcd2e1
commit b97e0cd788
1 changed files with 11 additions and 3 deletions
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14
drivers/spi/cf_spi.c
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@ -49,6 +49,14 @@ extern void cfspi_release_bus(uint bus, uint cs);
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SPI_IDLE_VAL
#if defined(CONFIG_SPI_MMC)
#define CONFIG_SPI_IDLE_VAL 0xFFFF
#else
#define CONFIG_SPI_IDLE_VAL 0x0
#endif
#endif
#if defined(CONFIG_CF_DSPI)
/* DSPI specific mode */
#define SPI_MODE_MOD 0x00200000
@ -145,7 +153,7 @@ int cfspi_xfer(struct spi_slave *slave, uint bitlen, const void *dout,
}
if (din != NULL) {
cfspi_tx(ctrl, 0);
cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL);
if (cfslave->charbit == 16)
*spi_rd16++ = cfspi_rx();
else
@ -169,7 +177,7 @@ int cfspi_xfer(struct spi_slave *slave, uint bitlen, const void *dout,
}
if (din != NULL) {
cfspi_tx(ctrl, 0);
cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL);
if (cfslave->charbit == 16)
*spi_rd16 = cfspi_rx();
else
@ -177,7 +185,7 @@ int cfspi_xfer(struct spi_slave *slave, uint bitlen, const void *dout,
}
} else {
/* dummy read */
cfspi_tx(ctrl, 0);
cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL);
cfspi_rx();
}