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linux
linux-davinci
Commits
4a3cba32
Commit
4a3cba32
authored
Jul 29, 2008
by
Pierre Ossman
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sdhci: handle bug in JMB38x for sizes < 4 bytes
Signed-off-by:
Pierre Ossman
<
drzeus@drzeus.cx
>
parent
94ad374a
Changes
3
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3 changed files
with
13 additions
and
1 deletion
+13
-1
drivers/mmc/host/sdhci-pci.c
drivers/mmc/host/sdhci-pci.c
+2
-1
drivers/mmc/host/sdhci.c
drivers/mmc/host/sdhci.c
+9
-0
drivers/mmc/host/sdhci.h
drivers/mmc/host/sdhci.h
+2
-0
No files found.
drivers/mmc/host/sdhci-pci.c
View file @
4a3cba32
...
...
@@ -143,7 +143,8 @@ static int jmicron_probe(struct sdhci_pci_chip *chip)
chip
->
quirks
|=
SDHCI_QUIRK_32BIT_DMA_ADDR
|
SDHCI_QUIRK_32BIT_DMA_SIZE
|
SDHCI_QUIRK_32BIT_ADMA_SIZE
|
SDHCI_QUIRK_RESET_AFTER_REQUEST
;
SDHCI_QUIRK_RESET_AFTER_REQUEST
|
SDHCI_QUIRK_BROKEN_SMALL_PIO
;
}
/*
...
...
drivers/mmc/host/sdhci.c
View file @
4a3cba32
...
...
@@ -278,6 +278,15 @@ static void sdhci_transfer_pio(struct sdhci_host *host)
else
mask
=
SDHCI_SPACE_AVAILABLE
;
/*
* Some controllers (JMicron JMB38x) mess up the buffer bits
* for transfers < 4 bytes. As long as it is just one block,
* we can ignore the bits.
*/
if
((
host
->
quirks
&
SDHCI_QUIRK_BROKEN_SMALL_PIO
)
&&
(
host
->
data
->
blocks
==
1
))
mask
=
~
0
;
while
(
readl
(
host
->
ioaddr
+
SDHCI_PRESENT_STATE
)
&
mask
)
{
if
(
host
->
data
->
flags
&
MMC_DATA_READ
)
sdhci_read_block_pio
(
host
);
...
...
drivers/mmc/host/sdhci.h
View file @
4a3cba32
...
...
@@ -206,6 +206,8 @@ struct sdhci_host {
#define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER (1<<11)
/* Controller provides an incorrect timeout value for transfers */
#define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL (1<<12)
/* Controller has an issue with buffer bits for small transfers */
#define SDHCI_QUIRK_BROKEN_SMALL_PIO (1<<13)
int
irq
;
/* Device IRQ */
void
__iomem
*
ioaddr
;
/* Mapped address */
...
...
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