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authorPierre Ossman <drzeus@drzeus.cx>2005-09-03 16:45:02 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-09-03 16:45:02 +0100
commit865e9f13c94891daed4f6a5f69c5d6ec04d4932f (patch)
treeea969a896c3b5be5dca761605275e0895efc3976 /drivers/mmc
parentf505380ba7b98ec97bf25300c2a58aeae903530b (diff)
[MMC] ios for mmc chip select
Adds a new ios for setting the chip select pin on MMC cards. Needed on SD controllers which use this pin for other things and therefore cannot have it pulled high at all times. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/mmc.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 3c5904834fe..0a8165974ba 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -457,6 +457,11 @@ static void mmc_idle_cards(struct mmc_host *host)
{
struct mmc_command cmd;
+ host->ios.chip_select = MMC_CS_HIGH;
+ host->ops->set_ios(host, &host->ios);
+
+ mmc_delay(1);
+
cmd.opcode = MMC_GO_IDLE_STATE;
cmd.arg = 0;
cmd.flags = MMC_RSP_NONE;
@@ -464,6 +469,11 @@ static void mmc_idle_cards(struct mmc_host *host)
mmc_wait_for_cmd(host, &cmd, 0);
mmc_delay(1);
+
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ops->set_ios(host, &host->ios);
+
+ mmc_delay(1);
}
/*
@@ -475,6 +485,7 @@ static void mmc_power_up(struct mmc_host *host)
host->ios.vdd = bit;
host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ host->ios.chip_select = MMC_CS_DONTCARE;
host->ios.power_mode = MMC_POWER_UP;
host->ops->set_ios(host, &host->ios);
@@ -492,6 +503,7 @@ static void mmc_power_off(struct mmc_host *host)
host->ios.clock = 0;
host->ios.vdd = 0;
host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ host->ios.chip_select = MMC_CS_DONTCARE;
host->ios.power_mode = MMC_POWER_OFF;
host->ops->set_ios(host, &host->ios);
}