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authorHans de Goede <hdegoede@redhat.com>2015-03-27 20:54:25 +0100
committerHans de Goede <hdegoede@redhat.com>2015-03-29 12:58:59 +0200
commit246e3b87870aaa774769267012f624757f28d873 (patch)
tree20b6e4eafb96d603199172e952a94cf3f2b8ffcc /arch/arm/cpu
parent5db752353b6a19c50db4a30692efb7e845fb8a6e (diff)
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sunxi: musb: Fix some lo speed devices not working with musb host
The usb0 / otg phy on sunxi boards has a bug where it wrongly detects a high speed squelch on usb reset deassert when a lo speed device is plugged in. The android kernel has a work around for this in the form of temporary disabling the phy's squelch detection on reset deassert, this commit adds the same workaround to the u-boot sunxi musb code, thereby fixing various usb lo speed devices not working. Tested with a (before non working) usb keyboard and a usb 2.4 GHz wireless keyboard/mouse combo receiver. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Diffstat (limited to 'arch/arm/cpu')
-rw-r--r--arch/arm/cpu/armv7/sunxi/usbc.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/usbc.c b/arch/arm/cpu/armv7/sunxi/usbc.c
index 14de9f9..524f25c 100644
--- a/arch/arm/cpu/armv7/sunxi/usbc.c
+++ b/arch/arm/cpu/armv7/sunxi/usbc.c
@@ -182,6 +182,13 @@ static void sunxi_usb_passby(struct sunxi_usbc_hcd *sunxi_usbc, int enable)
return;
}
+void sunxi_usbc_enable_squelch_detect(int index, int enable)
+{
+ struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index];
+
+ usb_phy_write(sunxi_usbc, 0x3c, enable ? 0 : 2, 2);
+}
+
int sunxi_usbc_request_resources(int index)
{
struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index];