/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
 27struct 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
 43struct usbhs_fifo_info {
 44	struct usbhs_fifo cfifo;
 45	struct usbhs_fifo d0fifo;
 46	struct usbhs_fifo d1fifo;
 47};
 48
 49struct usbhs_pkt_handle;
 50struct 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
 62struct 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 */
 71int usbhs_fifo_probe(struct usbhs_priv *priv);
 72void usbhs_fifo_remove(struct usbhs_priv *priv);
 73void usbhs_fifo_init(struct usbhs_priv *priv);
 74void usbhs_fifo_quit(struct usbhs_priv *priv);
 75
 76/*
 77 * packet info
 78 */
 79enum {
 80	USBHSF_PKT_PREPARE,
 81	USBHSF_PKT_TRY_RUN,
 82	USBHSF_PKT_DMA_DONE,
 83};
 84
 85extern struct usbhs_pkt_handle usbhs_fifo_pio_push_handler;
 86extern struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler;
 87extern struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
 88
 89extern struct usbhs_pkt_handle usbhs_fifo_dma_push_handler;
 90extern struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler;
 91
 92
 93void usbhs_pkt_init(struct usbhs_pkt *pkt);
 94void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
 95		    struct usbhs_pkt_handle *handler,
 96		    void *buf, int len, int zero);
 97struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
 98int __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 */