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usb: musb: da8xx: Implement BABBLE recovery 

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@bootlin.com>
Link: https://lore.kernel.org/r/20240528102026.40136-5-bastien.curutchet@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/815/merge
Bastien Curutchet 2024-05-28 12:20:26 +02:00 committed by Greg Kroah-Hartman
parent 608662dd60
commit 4cb9f2c5a2
1 changed files with 8 additions and 0 deletions
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8
drivers/usb/musb/da8xx.c
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@ -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,
};