drivers/usb/musb/musb_host.h

   1 /*
   2  * MUSB OTG driver host defines
   3  *
   4  * Copyright 2005 Mentor Graphics Corporation
   5  * Copyright (C) 2005-2006 by Texas Instruments
   6  * Copyright (C) 2006-2007 Nokia Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
  23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  25  * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  28  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  29  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #ifndef _MUSB_HOST_H
  36 #define _MUSB_HOST_H
  37
  38 #include <linux/scatterlist.h>
  39
  40 /* stored in "usb_host_endpoint.hcpriv" for scheduled endpoints */
  41 struct musb_qh {
  42         struct usb_host_endpoint *hep;          /* usbcore info */
  43         struct usb_device       *dev;
  44         struct musb_hw_ep       *hw_ep;         /* current binding */
  45
  46         struct list_head        ring;           /* of musb_qh */
  47         /* struct musb_qh               *next; */       /* for periodic tree */
  48         u8                      mux;            /* qh multiplexed to hw_ep */
  49
  50         unsigned                offset;         /* in urb->transfer_buffer */
  51         unsigned                segsize;        /* current xfer fragment */
  52
  53         u8                      type_reg;       /* {rx,tx} type register */
  54         u8                      intv_reg;       /* {rx,tx} interval register */
  55         u8                      addr_reg;       /* device address register */
  56         u8                      h_addr_reg;     /* hub address register */
  57         u8                      h_port_reg;     /* hub port register */
  58
  59         u8                      is_ready;       /* safe to modify hw_ep */
  60         u8                      type;           /* XFERTYPE_* */
  61         u8                      epnum;
  62         u8                      hb_mult;        /* high bandwidth pkts per uf */
  63         u16                     maxpacket;
  64         u16                     frame;          /* for periodic schedule */
  65         unsigned                iso_idx;        /* in urb->iso_frame_desc[] */
  66         struct sg_mapping_iter sg_miter;        /* for highmem in PIO mode */
  67         bool                    use_sg;         /* to track urb using sglist */
  68 };
  69
  70 /* map from control or bulk queue head to the first qh on that ring */
  71 static inline struct musb_qh *first_qh(struct list_head *q)
  72 {
  73         if (list_empty(q))
  74                 return NULL;
  75         return list_entry(q->next, struct musb_qh, ring);
  76 }
  77
  78
  79 #if IS_ENABLED(CONFIG_USB_MUSB_HOST) || IS_ENABLED(CONFIG_USB_MUSB_DUAL_ROLE)
  80 extern struct musb *hcd_to_musb(struct usb_hcd *);
  81 extern irqreturn_t musb_h_ep0_irq(struct musb *);
  82 extern int musb_host_alloc(struct musb *);
  83 extern int musb_host_setup(struct musb *, int);
  84 extern void musb_host_cleanup(struct musb *);
  85 extern void musb_host_tx(struct musb *, u8);
  86 extern void musb_host_rx(struct musb *, u8);
  87 extern void musb_root_disconnect(struct musb *musb);
  88 extern void musb_host_free(struct musb *);
  89 extern void musb_host_cleanup(struct musb *);
  90 extern void musb_host_tx(struct musb *, u8);
  91 extern void musb_host_rx(struct musb *, u8);
  92 extern void musb_root_disconnect(struct musb *musb);
  93 extern void musb_host_resume_root_hub(struct musb *musb);
  94 extern void musb_host_poke_root_hub(struct musb *musb);
  95 #else
  96 static inline struct musb *hcd_to_musb(struct usb_hcd *hcd)
  97 {
  98         return NULL;
  99 }
 100
 101 static inline irqreturn_t musb_h_ep0_irq(struct musb *musb)
 102 {
 103         return 0;
 104 }
 105
 106 static inline int musb_host_alloc(struct musb *musb)
 107 {
 108         return 0;
 109 }
 110
 111 static inline int musb_host_setup(struct musb *musb, int power_budget)
 112 {
 113         return 0;
 114 }
 115
 116 static inline void musb_host_cleanup(struct musb *musb)         {}
 117 static inline void musb_host_free(struct musb *musb)            {}
 118 static inline void musb_host_tx(struct musb *musb, u8 epnum)    {}
 119 static inline void musb_host_rx(struct musb *musb, u8 epnum)    {}
 120 static inline void musb_root_disconnect(struct musb *musb)      {}
 121 static inline void musb_host_resume_root_hub(struct musb *musb) {}
 122 static inline void musb_host_poll_rh_status(struct musb *musb)  {}
 123 static inline void musb_host_poke_root_hub(struct musb *musb)   {}
 124 #endif
 125
 126 struct usb_hcd;
 127
 128 extern int musb_hub_status_data(struct usb_hcd *hcd, char *buf);
 129 extern int musb_hub_control(struct usb_hcd *hcd,
 130                         u16 typeReq, u16 wValue, u16 wIndex,
 131                         char *buf, u16 wLength);
 132
 133 static inline struct urb *next_urb(struct musb_qh *qh)
 134 {
 135         struct list_head        *queue;
 136
 137         if (!qh)
 138                 return NULL;
 139         queue = &qh->hep->urb_list;
 140         if (list_empty(queue))
 141                 return NULL;
 142         return list_entry(queue->next, struct urb, urb_list);
 143 }
 144
 145 #endif                          /* _MUSB_HOST_H */