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mci: make write support optional 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2011-04-07 17:40:00 +02:00
parent 99b9ca240d
commit 64cc568eda
2 changed files with 11 additions and 0 deletions
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5
drivers/mci/Kconfig
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@ -25,6 +25,11 @@ config MCI_INFO
This entry adds more info about the attached MCI card, when the
'devinfo' command is used on the mci device.
config MCI_WRITE
bool "Support writing to MCI cards"
default y
select ATA_WRITE
comment "--- MCI host drivers ---"
config MCI_MXS

6
drivers/mci/mci-core.c
View File

@ -106,6 +106,7 @@ static void *sector_buf;
* @param blocknum Block number to write
* @return Transaction status (0 on success)
*/
#ifdef CONFIG_MCI_WRITE
static int mci_block_write(struct device_d *mci_dev, const void *src, unsigned blocknum)
{
struct mci *mci = GET_MCI_DATA(mci_dev);
@ -132,6 +133,7 @@ static int mci_block_write(struct device_d *mci_dev, const void *src, unsigned b
return mci_send_cmd(mci_dev, &cmd, &data);
}
#endif
/**
* Read one block of data from the card
@ -944,6 +946,7 @@ static int sd_send_if_cond(struct device_d *mci_dev)
*
* This routine expects the buffer has the correct size to read all data!
*/
#ifdef CONFIG_MCI_WRITE
static int mci_sd_write(struct device_d *disk_dev, uint64_t sector_start,
unsigned sector_count, const void *buffer)
{
@ -980,6 +983,7 @@ static int mci_sd_write(struct device_d *disk_dev, uint64_t sector_start,
return 0;
}
#endif
/**
* Read a chunk of sectors from media
@ -1218,7 +1222,9 @@ static int mci_card_probe(struct device_d *mci_dev)
disk_dev = xzalloc(sizeof(struct device_d) + sizeof(struct ata_interface));
p = (struct ata_interface*)&disk_dev[1];
#ifdef CONFIG_MCI_WRITE
p->write = mci_sd_write;
#endif
p->read = mci_sd_read;
p->priv = mci_dev;