There is no specific behaviour implemented to recover from a babble
error. When a BABBLE error happens, recovery fails as connected sticks
are no longer detected by the USB controller.
Implement the recover callback of the MUSB operation to reset the USB
controller when a BABBLE happens.
Signed-off-by: Bastien Curutchet <bastien.curutchet@xxxxxxxxxxx>
---
drivers/usb/musb/da8xx.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
index c5cf733673a2..fcf06dcf2d61 100644
--- a/drivers/usb/musb/da8xx.c
+++ b/drivers/usb/musb/da8xx.c
@@ -220,6 +220,13 @@ static void __maybe_unused da8xx_musb_try_idle(struct musb *musb, unsigned long
mod_timer(&musb->dev_timer, timeout);
}
+static int da8xx_babble_recover(struct musb *musb)
+{
+ dev_dbg(musb->controller, "resetting controller to recover from babble\n");
+ musb_writel(musb->ctrl_base, DA8XX_USB_CTRL_REG, DA8XX_SOFT_RESET_MASK);
+ return 0;
+}
+
static irqreturn_t da8xx_musb_interrupt(int irq, void *hci)
{
struct musb *musb = hci;
@@ -480,6 +487,7 @@ static const struct musb_platform_ops da8xx_ops = {
#ifndef CONFIG_USB_MUSB_HOST
.try_idle = da8xx_musb_try_idle,
#endif
+ .recover = da8xx_babble_recover,
.set_vbus = da8xx_musb_set_vbus,
};
--
2.44.0
