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cy82c693.c revision 1.5 
      1 /* $NetBSD: cy82c693.c,v 1.5 2008/01/04 21:18:01 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 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>
     45 __KERNEL_RCSID(0, "$NetBSD: cy82c693.c,v 1.5 2008/01/04 21:18:01 ad Exp $");
     46 
     47 #include "opt_multiprocessor.h"
     48 #include "opt_lockdebug.h"
     49 
     50 #include <sys/param.h>
     51 #include <sys/device.h>
     52 #include <sys/systm.h>
     53 #include <sys/bus.h>
     54 #include <sys/simplelock.h>
     55 
     56 #include <dev/pci/pcireg.h>
     57 #include <dev/pci/pcivar.h>
     58 
     59 #include <dev/pci/cy82c693reg.h>
     60 #include <dev/pci/cy82c693var.h>
     61 
     62 static struct cy82c693_handle cyhc_handle;
     63 static int cyhc_initialized;
     64 
     65 static struct simplelock cyhc_slock = SIMPLELOCK_INITIALIZER;
     66 
     67 #define	CYHC_LOCK(s)							\
     68 do {									\
     69 	s = splhigh();							\
     70 	simple_lock(&cyhc_slock);					\
     71 } while (0)
     72 
     73 #define	CYHC_UNLOCK(s)							\
     74 do {									\
     75 	simple_unlock(&cyhc_slock);					\
     76 	splx(s);							\
     77 } while (0)
     78 
     79 const struct cy82c693_handle *
     80 cy82c693_init(bus_space_tag_t iot)
     81 {
     82 	bus_space_handle_t ioh;
     83 	int s;
     84 
     85 	CYHC_LOCK(s);
     86 
     87 	if (cyhc_initialized) {
     88 		CYHC_UNLOCK(s);
     89 		if (iot != cyhc_handle.cyhc_iot)
     90 			panic("cy82c693_init");
     91 		return (&cyhc_handle);
     92 	}
     93 
     94 	if (bus_space_map(iot, CYHC_CONFIG_ADDR, 2, 0, &ioh) != 0) {
     95 		CYHC_UNLOCK(s);
     96 		return (NULL);
     97 	}
     98 
     99 	cyhc_handle.cyhc_iot = iot;
    100 	cyhc_handle.cyhc_ioh = ioh;
    101 
    102 	cyhc_initialized = 1;
    103 
    104 	CYHC_UNLOCK(s);
    105 
    106 	return (&cyhc_handle);
    107 }
    108 
    109 u_int8_t
    110 cy82c693_read(const struct cy82c693_handle *cyhc, int reg)
    111 {
    112 	int s;
    113 	u_int8_t rv;
    114 
    115 	CYHC_LOCK(s);
    116 
    117 	if (cyhc_initialized == 0) {
    118 		CYHC_UNLOCK(s);
    119 		panic("cy82c693_read");
    120 	}
    121 
    122 	bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg);
    123 	rv = bus_space_read_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1);
    124 
    125 	CYHC_UNLOCK(s);
    126 
    127 	return (rv);
    128 }
    129 
    130 void
    131 cy82c693_write(const struct cy82c693_handle *cyhc, int reg, u_int8_t val)
    132 {
    133 	int s;
    134 
    135 	CYHC_LOCK(s);
    136 
    137 	if (cyhc_initialized == 0) {
    138 		CYHC_UNLOCK(s);
    139 		panic("cy82c693_write");
    140 	}
    141 
    142 	bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg);
    143 	bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1, val);
    144 
    145 	CYHC_UNLOCK(s);
    146 }
    147