1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * MUSB OTG driver host defines 4 * 5 * Copyright 2005 Mentor Graphics Corporation 6 * Copyright (C) 2005-2006 by Texas Instruments 7 * Copyright (C) 2006-2007 Nokia Corporation 8 */ 9 10 #ifndef _MUSB_HOST_H 11 #define _MUSB_HOST_H 12 13 #include <linux/scatterlist.h> 14 15 /* stored in "usb_host_endpoint.hcpriv" for scheduled endpoints */ 16 struct musb_qh { 17 struct usb_host_endpoint *hep; /* usbcore info */ 18 struct usb_device *dev; 19 struct musb_hw_ep *hw_ep; /* current binding */ 20 21 struct list_head ring; /* of musb_qh */ 22 /* struct musb_qh *next; */ /* for periodic tree */ 23 u8 mux; /* qh multiplexed to hw_ep */ 24 25 unsigned offset; /* in urb->transfer_buffer */ 26 unsigned segsize; /* current xfer fragment */ 27 28 u8 type_reg; /* {rx,tx} type register */ 29 u8 intv_reg; /* {rx,tx} interval register */ 30 u8 addr_reg; /* device address register */ 31 u8 h_addr_reg; /* hub address register */ 32 u8 h_port_reg; /* hub port register */ 33 34 u8 is_ready; /* safe to modify hw_ep */ 35 u8 type; /* XFERTYPE_* */ 36 u8 epnum; 37 u8 hb_mult; /* high bandwidth pkts per uf */ 38 u16 maxpacket; 39 u16 frame; /* for periodic schedule */ 40 unsigned iso_idx; /* in urb->iso_frame_desc[] */ 41 struct sg_mapping_iter sg_miter; /* for highmem in PIO mode */ 42 bool use_sg; /* to track urb using sglist */ 43 }; 44 45 /* map from control or bulk queue head to the first qh on that ring */ 46 static inline struct musb_qh *first_qh(struct list_head *q) 47 { 48 if (list_empty(q)) 49 return NULL; 50 return list_entry(q->next, struct musb_qh, ring); 51 } 52 53 54 #if IS_ENABLED(CONFIG_USB_MUSB_HOST) || IS_ENABLED(CONFIG_USB_MUSB_DUAL_ROLE) 55 extern struct musb *hcd_to_musb(struct usb_hcd *); 56 extern irqreturn_t musb_h_ep0_irq(struct musb *); 57 extern int musb_host_alloc(struct musb *); 58 extern int musb_host_setup(struct musb *, int); 59 extern void musb_host_cleanup(struct musb *); 60 extern void musb_host_tx(struct musb *, u8); 61 extern void musb_host_rx(struct musb *, u8); 62 extern void musb_root_disconnect(struct musb *musb); 63 extern void musb_host_free(struct musb *); 64 extern void musb_host_resume_root_hub(struct musb *musb); 65 extern void musb_host_poke_root_hub(struct musb *musb); 66 extern int musb_port_suspend(struct musb *musb, bool do_suspend); 67 extern void musb_port_reset(struct musb *musb, bool do_reset); 68 extern void musb_host_finish_resume(struct work_struct *work); 69 #else 70 static inline struct musb *hcd_to_musb(struct usb_hcd *hcd) 71 { 72 return NULL; 73 } 74 75 static inline irqreturn_t musb_h_ep0_irq(struct musb *musb) 76 { 77 return 0; 78 } 79 80 static inline int musb_host_alloc(struct musb *musb) 81 { 82 return 0; 83 } 84 85 static inline int musb_host_setup(struct musb *musb, int power_budget) 86 { 87 return 0; 88 } 89 90 static inline void musb_host_cleanup(struct musb *musb) {} 91 static inline void musb_host_free(struct musb *musb) {} 92 static inline void musb_host_tx(struct musb *musb, u8 epnum) {} 93 static inline void musb_host_rx(struct musb *musb, u8 epnum) {} 94 static inline void musb_root_disconnect(struct musb *musb) {} 95 static inline void musb_host_resume_root_hub(struct musb *musb) {} 96 static inline void musb_host_poke_root_hub(struct musb *musb) {} 97 static inline int musb_port_suspend(struct musb *musb, bool do_suspend) 98 { 99 return 0; 100 } 101 static inline void musb_port_reset(struct musb *musb, bool do_reset) {} 102 static inline void musb_host_finish_resume(struct work_struct *work) {} 103 #endif 104 105 struct usb_hcd; 106 107 extern int musb_hub_status_data(struct usb_hcd *hcd, char *buf); 108 extern int musb_hub_control(struct usb_hcd *hcd, 109 u16 typeReq, u16 wValue, u16 wIndex, 110 char *buf, u16 wLength); 111 112 static inline struct urb *next_urb(struct musb_qh *qh) 113 { 114 struct list_head *queue; 115 116 if (!qh) 117 return NULL; 118 queue = &qh->hep->urb_list; 119 if (list_empty(queue)) 120 return NULL; 121 return list_entry(queue->next, struct urb, urb_list); 122 } 123 124 #endif /* _MUSB_HOST_H */ 125