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8e8a551654
In case of USB bulk transfer, when himem page is received, the usb_sg_init function sets the urb transfer buffer to NULL. When such URB transfer is handled, kernel crashes in PIO mode. Handle this by mapping the highmem buffer in PIO mode. Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com> Signed-off-by: Praveena NADAHALLY <praveen.nadahally@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Felipe Balbi <balbi@ti.com>
111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/*
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* MUSB OTG driver host defines
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*
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* Copyright 2005 Mentor Graphics Corporation
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* Copyright (C) 2005-2006 by Texas Instruments
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* Copyright (C) 2006-2007 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _MUSB_HOST_H
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#define _MUSB_HOST_H
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#include <linux/scatterlist.h>
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static inline struct usb_hcd *musb_to_hcd(struct musb *musb)
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{
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return container_of((void *) musb, struct usb_hcd, hcd_priv);
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}
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static inline struct musb *hcd_to_musb(struct usb_hcd *hcd)
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{
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return (struct musb *) (hcd->hcd_priv);
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}
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/* stored in "usb_host_endpoint.hcpriv" for scheduled endpoints */
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struct musb_qh {
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struct usb_host_endpoint *hep; /* usbcore info */
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struct usb_device *dev;
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struct musb_hw_ep *hw_ep; /* current binding */
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struct list_head ring; /* of musb_qh */
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/* struct musb_qh *next; */ /* for periodic tree */
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u8 mux; /* qh multiplexed to hw_ep */
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unsigned offset; /* in urb->transfer_buffer */
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unsigned segsize; /* current xfer fragment */
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u8 type_reg; /* {rx,tx} type register */
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u8 intv_reg; /* {rx,tx} interval register */
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u8 addr_reg; /* device address register */
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u8 h_addr_reg; /* hub address register */
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u8 h_port_reg; /* hub port register */
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u8 is_ready; /* safe to modify hw_ep */
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u8 type; /* XFERTYPE_* */
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u8 epnum;
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u8 hb_mult; /* high bandwidth pkts per uf */
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u16 maxpacket;
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u16 frame; /* for periodic schedule */
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unsigned iso_idx; /* in urb->iso_frame_desc[] */
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struct sg_mapping_iter sg_miter; /* for highmem in PIO mode */
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};
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/* map from control or bulk queue head to the first qh on that ring */
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static inline struct musb_qh *first_qh(struct list_head *q)
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{
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if (list_empty(q))
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return NULL;
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return list_entry(q->next, struct musb_qh, ring);
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}
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extern void musb_root_disconnect(struct musb *musb);
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struct usb_hcd;
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extern int musb_hub_status_data(struct usb_hcd *hcd, char *buf);
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extern int musb_hub_control(struct usb_hcd *hcd,
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u16 typeReq, u16 wValue, u16 wIndex,
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char *buf, u16 wLength);
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extern const struct hc_driver musb_hc_driver;
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static inline struct urb *next_urb(struct musb_qh *qh)
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{
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struct list_head *queue;
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if (!qh)
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return NULL;
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queue = &qh->hep->urb_list;
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if (list_empty(queue))
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return NULL;
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return list_entry(queue->next, struct urb, urb_list);
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}
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#endif /* _MUSB_HOST_H */
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