/*	$NetBSD: xhcivar.h,v 1.4 2014/03/10 13:12:02 skrll Exp $	*/

/*
 * Copyright (c) 2013 Jonathan A. Kollasch
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _DEV_USB_XHCIVAR_H_
#define _DEV_USB_XHCIVAR_H_

#include <sys/pool.h>

struct xhci_xfer {
	struct usbd_xfer xx_xfer;
	struct usb_task xx_abort_task;
	struct xhci_trb xx_trb[20];
};

struct xhci_ring {
	usb_dma_t xr_dma;
	kmutex_t xr_lock;
	struct xhci_trb * xr_trb;
	void **xr_cookies;
	u_int xr_ntrb;			/* number of elements for above */
	u_int xr_ep;			/* enqueue pointer */
	u_int xr_cs;			/* cycle state */
	bool is_halted;
};

struct xhci_endpoint {
	struct xhci_ring xe_tr;		/* transfer ring */
};

struct xhci_slot {
	usb_dma_t xs_dc_dma;		/* device context page */
	usb_dma_t xs_ic_dma;		/* input context page */
	struct xhci_endpoint xs_ep[32]; /* endpoints */
	u_int xs_idx;			/* slot index */
};

struct xhci_softc {
	device_t sc_dev;
	device_t sc_child;
	void *sc_ih;
	bus_size_t sc_ios;
	bus_space_tag_t sc_iot;
	bus_space_handle_t sc_ioh;	/* Base */
	bus_space_handle_t sc_cbh;	/* Capability Base */
	bus_space_handle_t sc_obh;	/* Operational Base */
	bus_space_handle_t sc_rbh;	/* Runtime Base */
	bus_space_handle_t sc_dbh;	/* Doorbell Registers */
	struct usbd_bus sc_bus;

	kmutex_t sc_lock;
	kmutex_t sc_intr_lock;
	kcondvar_t sc_softwake_cv;

	usbd_xfer_handle sc_intrxfer;

	pool_cache_t sc_xferpool;

	bus_size_t sc_pgsz;		/* xHCI page size */
	uint32_t sc_ctxsz;
	int sc_maxslots;
	int sc_maxintrs;
	int sc_maxports;
	int sc_maxspbuf;

	/* XXX suboptimal */
	int sc_hs_port_start;
	int sc_hs_port_count;
	int sc_ss_port_start;
	int sc_ss_port_count;

	struct xhci_slot * sc_slots;

	struct xhci_ring sc_cr;		/* command ring */
	struct xhci_ring sc_er;		/* event ring */

	usb_dma_t sc_eventst_dma;
	usb_dma_t sc_dcbaa_dma;
	usb_dma_t sc_spbufarray_dma;
	usb_dma_t *sc_spbuf_dma;

	//struct usb_dma_reserve sc_dma_reserve;

	kcondvar_t sc_command_cv;
	bus_addr_t sc_command_addr;
	struct xhci_trb sc_result_trb;

	bool sc_ac64;
	bool sc_dying;

	uint8_t sc_addr;
	uint8_t sc_conf;
};

int	xhci_init(struct xhci_softc *);
int	xhci_intr(void *);
int	xhci_detach(struct xhci_softc *, int);
int	xhci_activate(device_t, enum devact);
void	xhci_childdet(device_t, device_t);
bool	xhci_suspend(device_t, const pmf_qual_t *);
bool	xhci_resume(device_t, const pmf_qual_t *);
bool	xhci_shutdown(device_t, int);

#define XHCI_TRANSFER_RING_TRBS 256

#endif /* _DEV_USB_XHCIVAR_H_ */