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cacvar.h revision 1.13 
      1 /*	$NetBSD: cacvar.h,v 1.13 2006/12/28 19:17:12 ad Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _IC_CACVAR_H_
     40 #define	_IC_CACVAR_H_
     41 
     42 #define	CAC_MAX_CCBS	256
     43 #define	CAC_MAX_XFER	(0xffff * 512)
     44 #define	CAC_SG_SIZE	32
     45 
     46 #define	cac_inb(sc, port) \
     47 	bus_space_read_1((sc)->sc_iot, (sc)->sc_ioh, port)
     48 #define	cac_inw(sc, port) \
     49 	bus_space_read_2((sc)->sc_iot, (sc)->sc_ioh, port)
     50 #define	cac_inl(sc, port) \
     51 	bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, port)
     52 #define	cac_outb(sc, port, val) \
     53 	bus_space_write_1((sc)->sc_iot, (sc)->sc_ioh, port, val)
     54 #define	cac_outw(sc, port, val) \
     55 	bus_space_write_2((sc)->sc_iot, (sc)->sc_ioh, port, val)
     56 #define	cac_outl(sc, port, val) \
     57 	bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, port, val)
     58 
     59 /*
     60  * Stupid macros to deal with alignment/endianness issues.
     61  */
     62 
     63 #define	CAC_GET1(x)							\
     64 	(((u_char *)&(x))[0])
     65 #define	CAC_GET2(x)							\
     66 	(((u_char *)&(x))[0] | (((u_char *)&(x))[1] << 8))
     67 #define	CAC_GET4(x)							\
     68 	((((u_char *)&(x))[0] | (((u_char *)&(x))[1] << 8)) |		\
     69 	(((u_char *)&(x))[0] << 16 | (((u_char *)&(x))[1] << 24)))
     70 
     71 struct cac_softc;
     72 struct cac_ccb;
     73 
     74 struct cac_context {
     75 	void		(*cc_handler)(struct device *, void *, int);
     76 	struct device	*cc_dv;
     77 	void 		*cc_context;
     78 };
     79 
     80 struct cac_ccb {
     81 	/* Data the controller will touch - 276 bytes */
     82 	struct cac_hdr	ccb_hdr;
     83 	struct cac_req	ccb_req;
     84 	struct cac_sgb	ccb_seg[CAC_SG_SIZE];
     85 
     86 	/* Data the controller won't touch */
     87 	int		ccb_flags;
     88 	int		ccb_datasize;
     89 	paddr_t		ccb_paddr;
     90 	bus_dmamap_t	ccb_dmamap_xfer;
     91 	SIMPLEQ_ENTRY(cac_ccb) ccb_chain;
     92 	struct cac_context ccb_context;
     93 };
     94 
     95 #define	CAC_CCB_DATA_IN		0x0001	/* Map describes inbound xfer */
     96 #define	CAC_CCB_DATA_OUT	0x0002	/* Map describes outbound xfer */
     97 #define	CAC_CCB_ACTIVE		0x0004	/* Command submitted to controller */
     98 
     99 struct cac_linkage {
    100 	struct	cac_ccb *(*cl_completed)(struct cac_softc *);
    101 	int	(*cl_fifo_full)(struct cac_softc *);
    102 	void	(*cl_intr_enable)(struct cac_softc *, int);
    103 	int	(*cl_intr_pending)(struct cac_softc *);
    104 	void	(*cl_submit)(struct cac_softc *, struct cac_ccb *);
    105 };
    106 
    107 struct cac_softc {
    108 	struct device		sc_dv;
    109 	bus_space_tag_t		sc_iot;
    110 	bus_space_handle_t	sc_ioh;
    111 	bus_dma_tag_t		sc_dmat;
    112 	bus_dmamap_t		sc_dmamap;
    113 	int			sc_nunits;
    114 	void			*sc_ih;
    115 	caddr_t			sc_ccbs;
    116 	paddr_t			sc_ccbs_paddr;
    117 	SIMPLEQ_HEAD(, cac_ccb)	sc_ccb_free;
    118 	SIMPLEQ_HEAD(, cac_ccb)	sc_ccb_queue;
    119 	struct cac_linkage	sc_cl;
    120 };
    121 
    122 struct cac_attach_args {
    123 	int		caca_unit;
    124 };
    125 
    126 int	cac_cmd(struct cac_softc *, int, void *, int, int, int, int,
    127 		struct cac_context *);
    128 int	cac_init(struct cac_softc *, const char *, int);
    129 int	cac_intr(void *);
    130 
    131 extern const struct	cac_linkage cac_l0;
    132 
    133 #endif	/* !_IC_CACVAR_H_ */
    134