fifo.h

/*
 * Renesas USB driver
 *
 * Copyright (C) 2011 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */
#ifndef RENESAS_USB_FIFO_H
#define RENESAS_USB_FIFO_H

#include <linux/interrupt.h>
#include <linux/sh_dma.h>
#include <asm/dma.h>
#include "pipe.h"

#define	DMA_ADDR_INVALID	(~(dma_addr_t)0)

struct usbhs_fifo {
	char *name;
	u32 port;	/* xFIFO */
	u32 sel;	/* xFIFOSEL */
	u32 ctr;	/* xFIFOCTR */

	struct usbhs_pipe	*pipe;
	struct tasklet_struct	tasklet;

	struct dma_chan		*tx_chan;
	struct dma_chan		*rx_chan;

	struct sh_dmae_slave	tx_slave;
	struct sh_dmae_slave	rx_slave;
};

struct usbhs_fifo_info {
	struct usbhs_fifo cfifo;
	struct usbhs_fifo d0fifo;
	struct usbhs_fifo d1fifo;
};

struct usbhs_pkt_handle;
struct usbhs_pkt {
	struct list_head node;
	struct usbhs_pipe *pipe;
	struct usbhs_pkt_handle *handler;
	dma_addr_t dma;
	void *buf;
	int length;
	int trans;
	int actual;
	int zero;
};

struct usbhs_pkt_handle {
	int (*prepare)(struct usbhs_pkt *pkt, int *is_done);
	int (*try_run)(struct usbhs_pkt *pkt, int *is_done);
	int (*dma_done)(struct usbhs_pkt *pkt, int *is_done);
};

/*
 * fifo
 */
int usbhs_fifo_probe(struct usbhs_priv *priv);
void usbhs_fifo_remove(struct usbhs_priv *priv);
void usbhs_fifo_init(struct usbhs_priv *priv);
void usbhs_fifo_quit(struct usbhs_priv *priv);

/*
 * packet info
 */
enum {
	USBHSF_PKT_PREPARE,
	USBHSF_PKT_TRY_RUN,
	USBHSF_PKT_DMA_DONE,
};

extern struct usbhs_pkt_handle usbhs_fifo_pio_push_handler;
extern struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler;
extern struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;

extern struct usbhs_pkt_handle usbhs_fifo_dma_push_handler;
extern struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler;


void usbhs_pkt_init(struct usbhs_pkt *pkt);
void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
		    struct usbhs_pkt_handle *handler,
		    void *buf, int len, int zero);
struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
int __usbhs_pkt_handler(struct usbhs_pipe *pipe, int type);

#define usbhs_pkt_start(p)	__usbhs_pkt_handler(p, USBHSF_PKT_PREPARE)
#define usbhs_pkt_run(p)	__usbhs_pkt_handler(p, USBHSF_PKT_TRY_RUN)
#define usbhs_pkt_dmadone(p)	__usbhs_pkt_handler(p, USBHSF_PKT_DMA_DONE)

#endif /* RENESAS_USB_FIFO_H */