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 */ 146