drivers/usb/musb/musb_host.h

   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_cleanup(struct musb *);
  65 extern void musb_host_tx(struct musb *, u8);
  66 extern void musb_host_rx(struct musb *, u8);
  67 extern void musb_root_disconnect(struct musb *musb);
  68 extern void musb_host_resume_root_hub(struct musb *musb);
  69 extern void musb_host_poke_root_hub(struct musb *musb);
  70 extern int musb_port_suspend(struct musb *musb, bool do_suspend);
  71 extern void musb_port_reset(struct musb *musb, bool do_reset);
  72 extern void musb_host_finish_resume(struct work_struct *work);
  73 #else
  74 static inline struct musb *hcd_to_musb(struct usb_hcd *hcd)
  75 {
  76         return NULL;
  77 }
  78
  79 static inline irqreturn_t musb_h_ep0_irq(struct musb *musb)
  80 {
  81         return 0;
  82 }
  83
  84 static inline int musb_host_alloc(struct musb *musb)
  85 {
  86         return 0;
  87 }
  88
  89 static inline int musb_host_setup(struct musb *musb, int power_budget)
  90 {
  91         return 0;
  92 }
  93
  94 static inline void musb_host_cleanup(struct musb *musb)         {}
  95 static inline void musb_host_free(struct musb *musb)            {}
  96 static inline void musb_host_tx(struct musb *musb, u8 epnum)    {}
  97 static inline void musb_host_rx(struct musb *musb, u8 epnum)    {}
  98 static inline void musb_root_disconnect(struct musb *musb)      {}
  99 static inline void musb_host_resume_root_hub(struct musb *musb) {}
 100 static inline void musb_host_poll_rh_status(struct musb *musb)  {}
 101 static inline void musb_host_poke_root_hub(struct musb *musb)   {}
 102 static inline int musb_port_suspend(struct musb *musb, bool do_suspend)
 103 {
 104         return 0;
 105 }
 106 static inline void musb_port_reset(struct musb *musb, bool do_reset) {}
 107 static inline void musb_host_finish_resume(struct work_struct *work) {}
 108 #endif
 109
 110 struct usb_hcd;
 111
 112 extern int musb_hub_status_data(struct usb_hcd *hcd, char *buf);
 113 extern int musb_hub_control(struct usb_hcd *hcd,
 114                         u16 typeReq, u16 wValue, u16 wIndex,
 115                         char *buf, u16 wLength);
 116
 117 static inline struct urb *next_urb(struct musb_qh *qh)
 118 {
 119         struct list_head        *queue;
 120
 121         if (!qh)
 122                 return NULL;
 123         queue = &qh->hep->urb_list;
 124         if (list_empty(queue))
 125                 return NULL;
 126         return list_entry(queue->next, struct urb, urb_list);
 127 }
 128
 129 #endif                          /* _MUSB_HOST_H */