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cy82c693.c revision 1.1 
      1 /* $NetBSD: cy82c693.c,v 1.1 2000/06/06 03:07:39 thorpej 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 Jason R. Thorpe.
      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 /*
     40  * Common routines to read/write control registers on the Cypress 82c693
     41  * hyperCache(tm) Stand-Alone PCI Peripheral Controller with USB.
     42  */
     43 
     44 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     45 
     46 __KERNEL_RCSID(0, "$NetBSD: cy82c693.c,v 1.1 2000/06/06 03:07:39 thorpej Exp $");
     47 
     48 #include "opt_multiprocessor.h"
     49 #include "opt_lockdebug.h"
     50 
     51 #include <sys/param.h>
     52 #include <sys/device.h>
     53 #include <sys/systm.h>
     54 #include <sys/lock.h>
     55 
     56 #include <machine/bus.h>
     57 
     58 #include <dev/pci/pcireg.h>
     59 #include <dev/pci/pcivar.h>
     60 
     61 #include <dev/pci/cy82c693reg.h>
     62 #include <dev/pci/cy82c693var.h>
     63 
     64 static struct cy82c693_handle cyhc_handle;
     65 static int cyhc_initialized;
     66 
     67 #if defined(MULTIPROCESSOR) || defined(LOCKDEBUG)
     68 static struct simplelock cyhc_slock = SIMPLELOCK_INITIALIZER;
     69 #endif
     70 
     71 #define	CYHC_LOCK(s)							\
     72 do {									\
     73 	s = splhigh();							\
     74 	simple_lock(&cyhc_slock);					\
     75 } while (0)
     76 
     77 #define	CYHC_UNLOCK(s)							\
     78 do {									\
     79 	simple_unlock(&cyhc_slock);					\
     80 	splx(s);							\
     81 } while (0)
     82 
     83 const struct cy82c693_handle *
     84 cy82c693_init(bus_space_tag_t iot)
     85 {
     86 	bus_space_handle_t ioh;
     87 	int s;
     88 
     89 	CYHC_LOCK(s);
     90 
     91 	if (cyhc_initialized) {
     92 		CYHC_UNLOCK(s);
     93 		if (iot != cyhc_handle.cyhc_iot)
     94 			panic("cy82c693_init");
     95 		return (&cyhc_handle);
     96 	}
     97 
     98 	if (bus_space_map(iot, CYHC_CONFIG_ADDR, 2, 0, &ioh) != 0) {
     99 		CYHC_UNLOCK(s);
    100 		return (NULL);
    101 	}
    102 
    103 	cyhc_handle.cyhc_iot = iot;
    104 	cyhc_handle.cyhc_ioh = ioh;
    105 
    106 	cyhc_initialized = 1;
    107 
    108 	CYHC_UNLOCK(s);
    109 
    110 	return (&cyhc_handle);
    111 }
    112 
    113 u_int8_t
    114 cy82c693_read(const struct cy82c693_handle *cyhc, int reg)
    115 {
    116 	int s;
    117 	u_int8_t rv;
    118 
    119 	CYHC_LOCK(s);
    120 
    121 	if (cyhc_initialized == 0) {
    122 		CYHC_UNLOCK(s);
    123 		panic("cy82c693_read");
    124 	}
    125 
    126 	bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg);
    127 	rv = bus_space_read_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1);
    128 
    129 	CYHC_UNLOCK(s);
    130 
    131 	return (rv);
    132 }
    133 
    134 void
    135 cy82c693_write(const struct cy82c693_handle *cyhc, int reg, u_int8_t val)
    136 {
    137 	int s;
    138 
    139 	CYHC_LOCK(s);
    140 
    141 	if (cyhc_initialized == 0) {
    142 		CYHC_UNLOCK(s);
    143 		panic("cy82c693_write");
    144 	}
    145 
    146 	bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg);
    147 	bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1, val);
    148 
    149 	CYHC_UNLOCK(s);
    150 }
    151