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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/mmc.c
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/mmc.c')
-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 3c5904834fe8..0a8165974ba7 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);
}