Commit 4cb9f2c5 authored by Bastien Curutchet's avatar Bastien Curutchet Committed by Greg Kroah-Hartman
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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: default avatarBastien Curutchet <bastien.curutchet@bootlin.com>
Link: https://lore.kernel.org/r/20240528102026.40136-5-bastien.curutchet@bootlin.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 608662dd

drivers/usb/musb/da8xx.c

+8 −0
Original line number Diff line number Diff line
@@ -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,

};