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 <asm/dma.h>
  23 #include "pipe.h"
  24
  25 #define DMA_ADDR_INVALID        (~(dma_addr_t)0)
  26
  27 struct usbhs_fifo {
  28         char *name;
  29         u32 port;       /* xFIFO */
  30         u32 sel;        /* xFIFOSEL */
  31         u32 ctr;        /* xFIFOCTR */
  32
  33         struct usbhs_pipe       *pipe;
  34         struct tasklet_struct   tasklet;
  35
  36         struct dma_chan         *tx_chan;
  37         struct dma_chan         *rx_chan;
  38
  39         struct sh_dmae_slave    tx_slave;
  40         struct sh_dmae_slave    rx_slave;
  41 };
  42
  43 struct usbhs_fifo_info {
  44         struct usbhs_fifo cfifo;
  45         struct usbhs_fifo d0fifo;
  46         struct usbhs_fifo d1fifo;
  47 };
  48
  49 struct usbhs_pkt_handle;
  50 struct usbhs_pkt {
  51         struct list_head node;
  52         struct usbhs_pipe *pipe;
  53         struct usbhs_pkt_handle *handler;
  54         dma_addr_t dma;
  55         void *buf;
  56         int length;
  57         int trans;
  58         int actual;
  59         int zero;
  60 };
  61
  62 struct usbhs_pkt_handle {
  63         int (*prepare)(struct usbhs_pkt *pkt, int *is_done);
  64         int (*try_run)(struct usbhs_pkt *pkt, int *is_done);
  65         int (*dma_done)(struct usbhs_pkt *pkt, int *is_done);
  66 };
  67
  68 /*
  69  * fifo
  70  */
  71 int usbhs_fifo_probe(struct usbhs_priv *priv);
  72 void usbhs_fifo_remove(struct usbhs_priv *priv);
  73 void usbhs_fifo_init(struct usbhs_priv *priv);
  74 void usbhs_fifo_quit(struct usbhs_priv *priv);
  75
  76 /*
  77  * packet info
  78  */
  79 enum {
  80         USBHSF_PKT_PREPARE,
  81         USBHSF_PKT_TRY_RUN,
  82         USBHSF_PKT_DMA_DONE,
  83 };
  84
  85 extern struct usbhs_pkt_handle usbhs_fifo_pio_push_handler;
  86 extern struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler;
  87 extern struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
  88
  89 extern struct usbhs_pkt_handle usbhs_fifo_dma_push_handler;
  90 extern struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler;
  91
  92
  93 void usbhs_pkt_init(struct usbhs_pkt *pkt);
  94 void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
  95                     struct usbhs_pkt_handle *handler,
  96                     void *buf, int len, int zero);
  97 struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
  98 int __usbhs_pkt_handler(struct usbhs_pipe *pipe, int type);
  99
 100 #define usbhs_pkt_start(p)      __usbhs_pkt_handler(p, USBHSF_PKT_PREPARE)
 101 #define usbhs_pkt_run(p)        __usbhs_pkt_handler(p, USBHSF_PKT_TRY_RUN)
 102 #define usbhs_pkt_dmadone(p)    __usbhs_pkt_handler(p, USBHSF_PKT_DMA_DONE)
 103
 104 #endif /* RENESAS_USB_FIFO_H */