[edk2-devel] [PATCH v3 6/7] Platform/RaspberryPi: Power up sd, and tweak GPIOs

[Jeremy Linton]

It seems we should be powering up the sd cards, and possibly
the clocks as well to assure they are setup properly before
we attempt to access the controller.

Signed-off-by: Jeremy Linton <jeremy.linton at arm.com>
Reviewed-by: Andrei Warkentin <awarkentin at vmware.com>
---
 Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
index 28f57438c5..e55ed63efa 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
@@ -552,6 +552,16 @@ ApplyVariables (
       GpioPinFuncSet (37, GPIO_FSEL_ALT3);
       GpioPinFuncSet (38, GPIO_FSEL_ALT3);
       GpioPinFuncSet (39, GPIO_FSEL_ALT3);
+
+      /*
+       * power and clock everything by default
+       */
+      Status = mFwProtocol->SetPowerState (RPI_MBOX_POWER_STATE_SDHCI,
+                                           TRUE, TRUE); //SD on with wait
+      Status = mFwProtocol->SetGpioConfig (RPI_EXP_GPIO_SD_VOLT, 
+                                           RPI_EXP_GPIO_DIR_OUT, TRUE); //3.3v
+      Status = mFwProtocol->SetClockState (RPI_MBOX_CLOCK_RATE_EMMC2, TRUE);
+      Status = mFwProtocol->SetClockState (RPI_MBOX_CLOCK_RATE_EMMC, TRUE);
     }
   } else {
     DEBUG ((DEBUG_ERROR, "Model Family %d not supported...\n", mModelFamily));
-- 
2.13.7



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