Le vendredi 27 mars 2015 à 22:06 +0100, Hans de Goede a écrit : > 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.
This also made my USB low speed keyboard work with U-Boot, but I'm getting the following message after USB init: musb_h_ep0_irq 1069: no URB for end 0 In addition, enabling caps lock or num lock (which should trigger a LED) makes the keyboard stop working until I reset the board. On an USB2 keyboard, caps lock and num lock work just fine. I'll try to investigate that when I have time, thanks for working on this! > Signed-off-by: Hans de Goede <[email protected]> > --- > arch/arm/cpu/armv7/sunxi/usbc.c | 7 +++++++ > arch/arm/include/asm/arch-sunxi/usbc.h | 1 + > drivers/usb/musb-new/musb_uboot.c | 14 ++++++++++++++ > 3 files changed, 22 insertions(+) > > diff --git a/arch/arm/cpu/armv7/sunxi/usbc.c b/arch/arm/cpu/armv7/sunxi/usbc.c > index d2d9891..1c777aa 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]; > diff --git a/arch/arm/include/asm/arch-sunxi/usbc.h > b/arch/arm/include/asm/arch-sunxi/usbc.h > index 67281ec..ab0f272 100644 > --- a/arch/arm/include/asm/arch-sunxi/usbc.h > +++ b/arch/arm/include/asm/arch-sunxi/usbc.h > @@ -21,3 +21,4 @@ void sunxi_usbc_disable(int index); > void sunxi_usbc_vbus_enable(int index); > void sunxi_usbc_vbus_disable(int index); > int sunxi_usbc_vbus_detect(int index); > +void sunxi_usbc_enable_squelch_detect(int index, int enable); > 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 :
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