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authorRichard Purdie <rpurdie@rpsys.net>2006-01-05 20:44:57 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-01-05 20:44:57 +0000
commit945b957972844881002ab4f68534581f4427a30b (patch)
tree0b9a1deb5094b847ce943b8f101386f373f472c6 /drivers/pcmcia/pxa2xx_sharpsl.c
parent53b7c2b243bd31f857dddabd9339f2dd6ae3fb67 (diff)
downloadop-kernel-dev-945b957972844881002ab4f68534581f4427a30b.zip
op-kernel-dev-945b957972844881002ab4f68534581f4427a30b.tar.gz
[ARM] 3230/1: Sharp Scoop: Fix Shared Power Control Issues
Patch from Richard Purdie The SL-Cxx00 devices have a power control register in SCOOP that is shared by both CF and MMC/SD card slots. The CF reset code was resetting this register leading to various lockups as the MMC power was suddenly lost. This patch handles the CPR register in a more sensitive manner. It also removes some unneeded collie specific calls as the reset code handles this. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/pcmcia/pxa2xx_sharpsl.c')
-rw-r--r--drivers/pcmcia/pxa2xx_sharpsl.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/pcmcia/pxa2xx_sharpsl.c b/drivers/pcmcia/pxa2xx_sharpsl.c
index 56c5883..4fbd995 100644
--- a/drivers/pcmcia/pxa2xx_sharpsl.c
+++ b/drivers/pcmcia/pxa2xx_sharpsl.c
@@ -36,9 +36,18 @@
struct scoop_pcmcia_config *platform_scoop_config;
#define SCOOP_DEV platform_scoop_config->devs
-static void sharpsl_pcmcia_init_reset(struct scoop_pcmcia_dev *scoopdev)
+static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
{
+ struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];
+
reset_scoop(scoopdev->dev);
+
+ /* Shared power controls need to be handled carefully */
+ if (platform_scoop_config->power_ctrl)
+ platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
+ else
+ write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);
+
scoopdev->keep_vs = NO_KEEP_VS;
scoopdev->keep_rd = 0;
}
@@ -208,26 +217,17 @@ static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
- sharpsl_pcmcia_init_reset(&SCOOP_DEV[skt->nr]);
+ sharpsl_pcmcia_init_reset(skt);
/* Enable interrupt */
write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
-
- if (machine_is_collie())
- /* We need to disable SS_OUTPUT_ENA here. */
- write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR, read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR) & ~0x0080);
}
static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
- /* CF_BUS_OFF */
- sharpsl_pcmcia_init_reset(&SCOOP_DEV[skt->nr]);
-
- if (machine_is_collie())
- /* We need to disable SS_OUTPUT_ENA here. */
- write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR, read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR) & ~0x0080);
+ sharpsl_pcmcia_init_reset(skt);
}
static struct pcmcia_low_level sharpsl_pcmcia_ops = {
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