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/* SPDX-License-Identifier: GPL-2.0 */
* MUSB OTG driver host defines
* Copyright 2005 Mentor Graphics Corporation
* Copyright (C) 2005-2006 by Texas Instruments
* Copyright (C) 2006-2007 Nokia Corporation
#ifndef _MUSB_HOST_H
#define _MUSB_HOST_H
#include <linux/scatterlist.h>
/* stored in "usb_host_endpoint.hcpriv" for scheduled endpoints */
struct musb_qh {
struct usb_host_endpoint *hep; /* usbcore info */
struct usb_device *dev;
struct musb_hw_ep *hw_ep; /* current binding */
struct list_head ring; /* of musb_qh */
/* struct musb_qh *next; */ /* for periodic tree */
u8 mux; /* qh multiplexed to hw_ep */
unsigned offset; /* in urb->transfer_buffer */
unsigned segsize; /* current xfer fragment */
u8 type_reg; /* {rx,tx} type register */
u8 intv_reg; /* {rx,tx} interval register */
u8 addr_reg; /* device address register */
u8 h_addr_reg; /* hub address register */
u8 h_port_reg; /* hub port register */
u8 is_ready; /* safe to modify hw_ep */
u8 type; /* XFERTYPE_* */
u8 epnum;
u8 hb_mult; /* high bandwidth pkts per uf */
u16 maxpacket;
u16 frame; /* for periodic schedule */
unsigned iso_idx; /* in urb->iso_frame_desc[] */
struct sg_mapping_iter sg_miter; /* for highmem in PIO mode */
bool use_sg; /* to track urb using sglist */
/* map from control or bulk queue head to the first qh on that ring */
static inline struct musb_qh *first_qh(struct list_head *q)
if (list_empty(q))
return NULL;
return list_entry(q->next, struct musb_qh, ring);
extern struct musb *hcd_to_musb(struct usb_hcd *);
extern irqreturn_t musb_h_ep0_irq(struct musb *);
extern int musb_host_alloc(struct musb *);
extern int musb_host_setup(struct musb *, int);
extern void musb_host_cleanup(struct musb *);
extern void musb_host_tx(struct musb *, u8);
extern void musb_host_rx(struct musb *, u8);
extern void musb_root_disconnect(struct musb *musb);
extern void musb_host_free(struct musb *);
extern void musb_host_resume_root_hub(struct musb *musb);
extern void musb_host_poke_root_hub(struct musb *musb);
extern int musb_port_suspend(struct musb *musb, bool do_suspend);
extern void musb_port_reset(struct musb *musb, bool do_reset);
extern void musb_host_finish_resume(struct work_struct *work);
static inline struct musb *hcd_to_musb(struct usb_hcd *hcd)
return NULL;
static inline irqreturn_t musb_h_ep0_irq(struct musb *musb)
return 0;
static inline int musb_host_alloc(struct musb *musb)
return 0;
static inline int musb_host_setup(struct musb *musb, int power_budget)
return 0;
static inline void musb_host_cleanup(struct musb *musb) {}
static inline void musb_host_free(struct musb *musb) {}
static inline void musb_host_tx(struct musb *musb, u8 epnum) {}
static inline void musb_host_rx(struct musb *musb, u8 epnum) {}
static inline void musb_root_disconnect(struct musb *musb) {}
static inline void musb_host_resume_root_hub(struct musb *musb) {}
static inline void musb_host_poke_root_hub(struct musb *musb) {}
static inline int musb_port_suspend(struct musb *musb, bool do_suspend)
return 0;
static inline void musb_port_reset(struct musb *musb, bool do_reset) {}
static inline void musb_host_finish_resume(struct work_struct *work) {}
struct usb_hcd;
extern int musb_hub_status_data(struct usb_hcd *hcd, char *buf);
extern int musb_hub_control(struct usb_hcd *hcd,
u16 typeReq, u16 wValue, u16 wIndex,
char *buf, u16 wLength);
static inline struct urb *next_urb(struct musb_qh *qh)
struct list_head *queue;
if (!qh)
return NULL;
queue = &qh->hep->urb_list;
if (list_empty(queue))
return NULL;
return list_entry(queue->next, struct urb, urb_list);
#endif /* _MUSB_HOST_H */