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| author | Hans de Goede <hdegoede@redhat.com> | 2015-03-27 20:54:25 +0100 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2015-03-29 12:58:59 +0200 |
| commit | 246e3b87870aaa774769267012f624757f28d873 (patch) | |
| tree | 20b6e4eafb96d603199172e952a94cf3f2b8ffcc /drivers | |
| parent | 5db752353b6a19c50db4a30692efb7e845fb8a6e (diff) | |
| download | u-boot-imx-246e3b87870aaa774769267012f624757f28d873.zip u-boot-imx-246e3b87870aaa774769267012f624757f28d873.tar.gz u-boot-imx-246e3b87870aaa774769267012f624757f28d873.tar.bz2 | |
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 'drivers')
| -rw-r--r-- | drivers/usb/musb-new/musb_uboot.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/musb-new/musb_uboot.c b/drivers/usb/musb-new/musb_uboot.c index 6e58ddf..51fb3fd 100644 --- a/drivers/usb/musb-new/musb_uboot.c +++ b/drivers/usb/musb-new/musb_uboot.c @@ -1,5 +1,8 @@ #include <common.h> #include <watchdog.h> +#ifdef CONFIG_ARCH_SUNXI +#include <asm/arch/usbc.h> +#endif #include <asm/errno.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> @@ -186,8 +189,19 @@ void usb_reset_root_port(void) power &= 0xf0; musb_writeb(mbase, MUSB_POWER, MUSB_POWER_RESET | power); mdelay(50); +#ifdef CONFIG_ARCH_SUNXI + /* + * sunxi phy has a bug and it will wrongly detect high speed squelch + * when clearing reset on low-speed devices, temporary disable + * squelch detection to work around this. + */ + sunxi_usbc_enable_squelch_detect(0, 0); +#endif power = musb_readb(mbase, MUSB_POWER); musb_writeb(mbase, MUSB_POWER, ~MUSB_POWER_RESET & power); +#ifdef CONFIG_ARCH_SUNXI + sunxi_usbc_enable_squelch_detect(0, 1); +#endif host->isr(0, host); host_speed = (musb_readb(mbase, MUSB_POWER) & MUSB_POWER_HSMODE) ? USB_SPEED_HIGH : |