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LPC31 EHCI: Seems to work after re-ordering some initialization logic

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This commit is contained in:
Gregory Nutt 2013-11-27 13:14:23 -06:00
parent 5fb0062d2d
commit afb0209207
2 changed files with 16 additions and 1 deletions
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10
arch/arm/src/lpc31xx/lpc31_ehci.c
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@ -4307,7 +4307,7 @@ FAR struct usbhost_connection_s *lpc31_ehci_initialize(int controller)
* SLOM Not used in host mode.
* SDIS = 1, Stream disable mode. Eliminates overruns/underruns at
* the expense of some performance.
* VBPS = 1, off chip power source
* VBPS = 1, off-chip power source
*/
putreg32(USBHOST_USBMODE_CMHOST | USBHOST_USBMODE_SDIS | USBHOST_USBMODE_VBPS,
@ -4323,6 +4323,14 @@ FAR struct usbhost_connection_s *lpc31_ehci_initialize(int controller)
return NULL;
}
/* Re-program the USB host controller. As implemented, lpc31_reset()
* requires the host mode setup in order to work. However, we lose the
* host configuration in the reset.
*/
putreg32(USBHOST_USBMODE_CMHOST | USBHOST_USBMODE_SDIS | USBHOST_USBMODE_VBPS,
LPC31_USBDEV_USBMODE);
/* "In order to initialize the host controller, software should perform the
* following steps:
*

7
configs/olimex-lpc-h3131/README.txt
View File

@ -686,3 +686,10 @@ Configurations
Application Configuration -> System Add-Ons
CONFIG_SYSTEM_USBMONITOR=y
CONFIG_SYSTEM_USBMONITOR_INTERVAL=1
NOTE: I have found that if you enable USB DEBUG and/or USB tracing,
the resulting image requires to much memory to execute out of
internal SRAM. I was able to get the configurations to run out of
SRAM with debug/tracing enabled by carefully going through the
configuration and reducing stack sizes, disabling unused OS features,
disabling un-necessary NSH commands, etc.