drivers/usb/renesas_usbhs/fifo.h

   1 /*
   2  * Renesas USB driver
   3  *
   4  * Copyright (C) 2011 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program; if not, write to the Free Software
  14  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  15  *
  16  */
  17 #ifndef RENESAS_USB_FIFO_H
  18 #define RENESAS_USB_FIFO_H
  19
  20 #include "pipe.h"
  21
  22 struct usbhs_pkt_handle;
  23 struct usbhs_pkt {
  24         struct list_head node;
  25         struct usbhs_pipe *pipe;
  26         struct usbhs_pkt_handle *handler;
  27         void *buf;
  28         int length;
  29         int actual;
  30         int zero;
  31 };
  32
  33 struct usbhs_pkt_handle {
  34         int (*prepare)(struct usbhs_pkt *pkt, int *is_done);
  35         int (*try_run)(struct usbhs_pkt *pkt, int *is_done);
  36 };
  37
  38 /*
  39  * fifo
  40  */
  41 void usbhs_fifo_init(struct usbhs_priv *priv);
  42 void usbhs_fifo_quit(struct usbhs_priv *priv);
  43
  44 /*
  45  * packet info
  46  */
  47 enum {
  48         USBHSF_PKT_PREPARE,
  49         USBHSF_PKT_TRY_RUN,
  50 };
  51
  52 extern struct usbhs_pkt_handle usbhs_fifo_push_handler;
  53 extern struct usbhs_pkt_handle usbhs_fifo_pop_handler;
  54 extern struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
  55
  56 void usbhs_pkt_init(struct usbhs_pkt *pkt);
  57 void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
  58                     struct usbhs_pkt_handle *handler,
  59                     void *buf, int len, int zero);
  60 struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
  61 int __usbhs_pkt_handler(struct usbhs_pipe *pipe, int type);
  62
  63 #define usbhs_pkt_start(p)      __usbhs_pkt_handler(p, USBHSF_PKT_PREPARE)
  64 #define usbhs_pkt_run(p)        __usbhs_pkt_handler(p, USBHSF_PKT_TRY_RUN)
  65
  66 #endif /* RENESAS_USB_FIFO_H */