LXR linux/drivers/usb/renesas

   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
  26struct 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#define USBHS_MAX_NUM_DFIFO     4
  42struct usbhs_fifo_info {
  43        struct usbhs_fifo cfifo;
  44        struct usbhs_fifo dfifo[USBHS_MAX_NUM_DFIFO];
  45};
  46#define usbhsf_get_dnfifo(p, n) (&((p)->fifo_info.dfifo[n]))
  47#define usbhs_for_each_dfifo(priv, dfifo, i)                    \
  48        for ((i) = 0;                                           \
  49             ((i) < USBHS_MAX_NUM_DFIFO) &&                     \
  50                     ((dfifo) = usbhsf_get_dnfifo(priv, (i)));  \
  51             (i)++)
  52
  53struct usbhs_pkt_handle;
  54struct usbhs_pkt {
  55        struct list_head node;
  56        struct usbhs_pipe *pipe;
  57        const struct usbhs_pkt_handle *handler;
  58        void (*done)(struct usbhs_priv *priv,
  59                     struct usbhs_pkt *pkt);
  60        struct work_struct work;
  61        dma_addr_t dma;
  62        dma_cookie_t cookie;
  63        void *buf;
  64        int length;
  65        int trans;
  66        int actual;
  67        int zero;
  68        int sequence;
  69};
  70
  71struct usbhs_pkt_handle {
  72        int (*prepare)(struct usbhs_pkt *pkt, int *is_done);
  73        int (*try_run)(struct usbhs_pkt *pkt, int *is_done);
  74        int (*dma_done)(struct usbhs_pkt *pkt, int *is_done);
  75};
  76
  77/*
  78 * fifo
  79 */
  80int usbhs_fifo_probe(struct usbhs_priv *priv);
  81void usbhs_fifo_remove(struct usbhs_priv *priv);
  82void usbhs_fifo_init(struct usbhs_priv *priv);
  83void usbhs_fifo_quit(struct usbhs_priv *priv);
  84void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe);
  85
  86/*
  87 * packet info
  88 */
  89extern const struct usbhs_pkt_handle usbhs_fifo_pio_push_handler;
  90extern const struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler;
  91extern const struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
  92
  93extern const struct usbhs_pkt_handle usbhs_fifo_dma_push_handler;
  94extern const struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler;
  95
  96extern const struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler;
  97extern const struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler;
  98
  99extern const struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler;
 100extern const struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler;
 101
 102void usbhs_pkt_init(struct usbhs_pkt *pkt);
 103void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
 104                    void (*done)(struct usbhs_priv *priv,
 105                                 struct usbhs_pkt *pkt),
 106                    void *buf, int len, int zero, int sequence);
 107struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
 108void usbhs_pkt_start(struct usbhs_pipe *pipe);
 109
 110#endif /* RENESAS_USB_FIFO_H */
 111