Commit 591fa9dd authored by Hans de Goede's avatar Hans de Goede Committed by Felipe Balbi
Browse files

usb: musb: Add pre and post root port reset end callbacks 



The sunxi otg phy has a bug where it wrongly detects a high speed squelch
when reset on the root port gets de-asserted with a lo-speed device.

The workaround for this is to disable squelch detect before de-asserting
reset, and re-enabling it after the reset de-assert is done.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 672bfdaa

drivers/usb/musb/musb_core.h

+16 −0
Original line number Diff line number Diff line
@@ -167,6 +167,8 @@ struct musb_io; 
 * @vbus_status: returns vbus status if possible

 * @set_vbus:	forces vbus status

 * @adjust_channel_params: pre check for standard dma channel_program func

 * @pre_root_reset_end: called before the root usb port reset flag gets cleared

 * @post_root_reset_end: called after the root usb port reset flag gets cleared

 */

struct musb_platform_ops {
@@ -210,6 +212,8 @@ struct musb_platform_ops { 
	int	(*adjust_channel_params)(struct dma_channel *channel,

				u16 packet_sz, u8 *mode,

				dma_addr_t *dma_addr, u32 *len);

	void	(*pre_root_reset_end)(struct musb *musb);

	void	(*post_root_reset_end)(struct musb *musb);

};



/*
@@ -595,4 +599,16 @@ static inline int musb_platform_exit(struct musb *musb) 
	return musb->ops->exit(musb);

}



static inline void musb_platform_pre_root_reset_end(struct musb *musb)

{

	if (musb->ops->pre_root_reset_end)

		musb->ops->pre_root_reset_end(musb);

}



static inline void musb_platform_post_root_reset_end(struct musb *musb)

{

	if (musb->ops->post_root_reset_end)

		musb->ops->post_root_reset_end(musb);

}



#endif	/* __MUSB_CORE_H__ */

drivers/usb/musb/musb_virthub.c

+2 −0
Original line number Diff line number Diff line
@@ -195,8 +195,10 @@ void musb_port_reset(struct musb *musb, bool do_reset) 
				      msecs_to_jiffies(50));

	} else {

		dev_dbg(musb->controller, "root port reset stopped\n");

		musb_platform_pre_root_reset_end(musb);

		musb_writeb(mbase, MUSB_POWER,

				power & ~MUSB_POWER_RESET);

		musb_platform_post_root_reset_end(musb);



		power = musb_readb(mbase, MUSB_POWER);

		if (power & MUSB_POWER_HSMODE) {

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