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Annotation of sys/dev/pci/cy82c693.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: cy82c693.c,v 1.5 2004/06/13 21:49:25 niklas Exp $     */
                      2: /* $NetBSD: cy82c693.c,v 1.1 2000/06/06 03:07:39 thorpej Exp $ */
                      3:
                      4: /*-
                      5:  * Copyright (c) 2000 The NetBSD Foundation, Inc.
                      6:  * All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to The NetBSD Foundation
                      9:  * by Jason R. Thorpe.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. All advertising materials mentioning features or use of this software
                     20:  *    must display the following acknowledgement:
                     21:  *     This product includes software developed by the NetBSD
                     22:  *     Foundation, Inc. and its contributors.
                     23:  * 4. Neither the name of The NetBSD Foundation nor the names of its
                     24:  *    contributors may be used to endorse or promote products derived
                     25:  *    from this software without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     28:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     29:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     30:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     31:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     32:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     33:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     34:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     35:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     36:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     37:  * POSSIBILITY OF SUCH DAMAGE.
                     38:  */
                     39:
                     40: /*
                     41:  * Common routines to read/write control registers on the Cypress 82c693
                     42:  * hyperCache(tm) Stand-Alone PCI Peripheral Controller with USB.
                     43:  */
                     44:
                     45: #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
                     46:
                     47: #include <sys/param.h>
                     48: #include <sys/device.h>
                     49: #include <sys/systm.h>
                     50: #include <sys/lock.h>
                     51:
                     52: #include <machine/bus.h>
                     53:
                     54: #include <dev/pci/pcireg.h>
                     55: #include <dev/pci/pcivar.h>
                     56:
                     57: #include <dev/pci/cy82c693reg.h>
                     58: #include <dev/pci/cy82c693var.h>
                     59:
                     60: static struct cy82c693_handle cyhc_handle;
                     61: static int cyhc_initialized;
                     62:
                     63: struct simplelock cyhc_slock;
                     64:
                     65: #define        CYHC_LOCK(s)                                                    \
                     66: do {                                                                   \
                     67:        s = splhigh();                                                  \
                     68:        simple_lock(&cyhc_slock);                                       \
                     69: } while (0)
                     70:
                     71: #define        CYHC_UNLOCK(s)                                                  \
                     72: do {                                                                   \
                     73:        simple_unlock(&cyhc_slock);                                     \
                     74:        splx(s);                                                        \
                     75: } while (0)
                     76:
                     77: const struct cy82c693_handle *
                     78: cy82c693_init(bus_space_tag_t iot)
                     79: {
                     80:        bus_space_handle_t ioh;
                     81:        int s;
                     82:        int error;
                     83:
                     84:        simple_lock_init(&cyhc_slock);
                     85:
                     86:        CYHC_LOCK(s);
                     87:
                     88:        if (cyhc_initialized) {
                     89:                CYHC_UNLOCK(s);
                     90:                if (iot != cyhc_handle.cyhc_iot)
                     91:                        panic("cy82c693_init");
                     92:                return (&cyhc_handle);
                     93:        }
                     94:
                     95:        if ((error = bus_space_map(iot, CYHC_CONFIG_ADDR, 2, 0, &ioh)) != 0) {
                     96:                CYHC_UNLOCK(s);
                     97:                printf("cy82c693_init: bus_space_map failed (%d)", error);
                     98:                return (NULL);
                     99:        }
                    100:
                    101:        cyhc_handle.cyhc_iot = iot;
                    102:        cyhc_handle.cyhc_ioh = ioh;
                    103:
                    104:        cyhc_initialized = 1;
                    105:
                    106:        CYHC_UNLOCK(s);
                    107:
                    108:        return (&cyhc_handle);
                    109: }
                    110:
                    111: u_int8_t
                    112: cy82c693_read(const struct cy82c693_handle *cyhc, int reg)
                    113: {
                    114:        int s;
                    115:        u_int8_t rv;
                    116:
                    117:        CYHC_LOCK(s);
                    118:
                    119:        if (cyhc_initialized == 0) {
                    120:                CYHC_UNLOCK(s);
                    121:                panic("cy82c693_read");
                    122:        }
                    123:
                    124:        bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg);
                    125:        rv = bus_space_read_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1);
                    126:
                    127:        CYHC_UNLOCK(s);
                    128:
                    129:        return (rv);
                    130: }
                    131:
                    132: void
                    133: cy82c693_write(const struct cy82c693_handle *cyhc, int reg, u_int8_t val)
                    134: {
                    135:        int s;
                    136:
                    137:        CYHC_LOCK(s);
                    138:
                    139:        if (cyhc_initialized == 0) {
                    140:                CYHC_UNLOCK(s);
                    141:                panic("cy82c693_write");
                    142:        }
                    143:
                    144:        bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg);
                    145:        bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1, val);
                    146:
                    147:        CYHC_UNLOCK(s);
                    148: }