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 <linux/interrupt.h>
  21 #include <linux/sh_dma.h>
  22 #include <linux/workqueue.h>
  23 #include <asm/dma.h>
  24 #include "pipe.h"
  25
  26 struct usbhs_fifo {
  27         char *name;
  28         u32 port;       /* xFIFO */
  29         u32 sel;        /* xFIFOSEL */
  30         u32 ctr;        /* xFIFOCTR */
  31
  32         struct usbhs_pipe       *pipe;
  33
  34         struct dma_chan         *tx_chan;
  35         struct dma_chan         *rx_chan;
  36
  37         struct sh_dmae_slave    tx_slave;
  38         struct sh_dmae_slave    rx_slave;
  39 };
  40
  41 struct usbhs_fifo_info {
  42         struct usbhs_fifo cfifo;
  43         struct usbhs_fifo d0fifo;
  44         struct usbhs_fifo d1fifo;
  45 };
  46
  47 struct usbhs_pkt_handle;
  48 struct usbhs_pkt {
  49         struct list_head node;
  50         struct usbhs_pipe *pipe;
  51         struct usbhs_pkt_handle *handler;
  52         void (*done)(struct usbhs_priv *priv,
  53                      struct usbhs_pkt *pkt);
  54         struct work_struct work;
  55         dma_addr_t dma;
  56         void *buf;
  57         int length;
  58         int trans;
  59         int actual;
  60         int zero;
  61         int sequence;
  62 };
  63
  64 struct usbhs_pkt_handle {
  65         int (*prepare)(struct usbhs_pkt *pkt, int *is_done);
  66         int (*try_run)(struct usbhs_pkt *pkt, int *is_done);
  67         int (*dma_done)(struct usbhs_pkt *pkt, int *is_done);
  68 };
  69
  70 /*
  71  * fifo
  72  */
  73 int usbhs_fifo_probe(struct usbhs_priv *priv);
  74 void usbhs_fifo_remove(struct usbhs_priv *priv);
  75 void usbhs_fifo_init(struct usbhs_priv *priv);
  76 void usbhs_fifo_quit(struct usbhs_priv *priv);
  77
  78 /*
  79  * packet info
  80  */
  81 extern struct usbhs_pkt_handle usbhs_fifo_pio_push_handler;
  82 extern struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler;
  83 extern struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
  84
  85 extern struct usbhs_pkt_handle usbhs_fifo_dma_push_handler;
  86 extern struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler;
  87
  88 extern struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler;
  89 extern struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler;
  90
  91 extern struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler;
  92 extern struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler;
  93
  94 void usbhs_pkt_init(struct usbhs_pkt *pkt);
  95 void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
  96                     void (*done)(struct usbhs_priv *priv,
  97                                  struct usbhs_pkt *pkt),
  98                     void *buf, int len, int zero, int sequence);
  99 struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
 100 void usbhs_pkt_start(struct usbhs_pipe *pipe);
 101
 102 #endif /* RENESAS_USB_FIFO_H */