The EfikaSB has a bug requiring to write to an ULPI register after powerup. It doesn't seem that this this bug is present on any other hardware, so add a workaround directly into the driver. Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> --- drivers/usb/host/ehci-hcd.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 02ec714..9b9e049 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -426,6 +426,27 @@ static inline int min3(int a, int b, int c) return a; } +#ifdef CONFIG_MACH_EFIKA_MX_SMARTBOOK +#include <usb/ulpi.h> +/* + * Add support for setting CHRGVBUS to workaround a hardware bug on efika mx/sb + * boards. + * See http://lists.infradead.org/pipermail/linux-arm-kernel/2011-January/037341.html + */ +void ehci_powerup_fixup(struct ehci_priv *ehci) +{ + void *viewport = (void *)ehci->hcor + 0x30; + + if (ehci->dev->id > 0) + ulpi_write(ULPI_OTG_CHRG_VBUS, ULPI_OTGCTL + ULPI_REG_SET, + viewport); +} +#else +static inline void ehci_powerup_fixup(struct ehci_priv *ehci) +{ +} +#endif + static int ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer, int length, struct devrequest *req) @@ -611,7 +632,7 @@ ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer, * usb 2.0 specification say 50 ms resets on * root */ - ehci_powerup_fixup(ehci->dev, ®); + ehci_powerup_fixup(ehci); wait_ms(50); -- 1.7.10.4 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
