1 /* $NetBSD: aic77xx.c,v 1.8 2009/03/14 15:36:17 dsl Exp $ */
2
3 /*
4 * Common routines for AHA-27/284X and aic7770 motherboard SCSI controllers.
5 *
6 * Copyright (c) 1994, 1995, 1996, 1997, 1998 Justin T. Gibbs.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice immediately at the beginning of the file, without modification,
14 * this list of conditions, and the following disclaimer.
15 * 2. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $FreeBSD: src/sys/dev/aic7xxx/ahc_eisa.c,v 1.15 2000/01/29 14:22:19 peter Exp $
31 */
32
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: aic77xx.c,v 1.8 2009/03/14 15:36:17 dsl Exp $");
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/device.h>
39
40 #include <sys/bus.h>
41 #include <sys/intr.h>
42
43 #include <dev/scsipi/scsi_all.h>
44 #include <dev/scsipi/scsipi_all.h>
45 #include <dev/scsipi/scsiconf.h>
46
47 #include <dev/ic/aic7xxx_osm.h>
48 #include <dev/ic/aic7xxx_inline.h>
49 #include <dev/ic/aic77xxreg.h>
50 #include <dev/ic/aic77xxvar.h>
51
52 /*
53 * Return irq setting of the board, otherwise -1.
54 */
55 int
ahc_aic77xx_irq(bus_space_tag_t iot,bus_space_handle_t ioh)56 ahc_aic77xx_irq(bus_space_tag_t iot, bus_space_handle_t ioh)
57 {
58 int irq;
59 u_int8_t intdef;
60 u_int8_t hcntrl;
61
62 /* Pause the card preseving the IRQ type */
63 hcntrl = bus_space_read_1(iot, ioh, HCNTRL) & IRQMS;
64 bus_space_write_1(iot, ioh, HCNTRL, hcntrl | PAUSE);
65
66 intdef = bus_space_read_1(iot, ioh, INTDEF);
67 irq = (intdef & INTDEF_IRQ_MASK);
68 switch (irq) {
69 case 9:
70 case 10:
71 case 11:
72 case 12:
73 case 14:
74 case 15:
75 break;
76 default:
77 printf("ahc_aic77xx_irq: illegal irq setting %d\n", intdef);
78 return (-1);
79 }
80
81 return (irq);
82 }
83
84 int
ahc_aic77xx_attach(struct ahc_softc * ahc)85 ahc_aic77xx_attach(struct ahc_softc *ahc)
86 {
87 u_int8_t sblkctl;
88 u_int8_t sblkctl_orig;
89 u_int8_t hostconf;
90
91 /*
92 * See if we have a Rev E or higher aic7770. Anything below a
93 * Rev E will have a R/O autoflush disable configuration bit.
94 */
95 sblkctl_orig = ahc_inb(ahc, SBLKCTL);
96 sblkctl = sblkctl_orig ^ AUTOFLUSHDIS;
97 ahc_outb(ahc, SBLKCTL, sblkctl);
98 sblkctl = ahc_inb(ahc, SBLKCTL);
99 if (sblkctl != sblkctl_orig) {
100 printf("%s: aic7770 >= Rev E: R/O autoflush enabled\n",
101 ahc_name(ahc));
102 /*
103 * Ensure autoflush is enabled
104 */
105 sblkctl &= ~AUTOFLUSHDIS;
106 ahc_outb(ahc, SBLKCTL, sblkctl);
107 }
108
109 /* Setup the FIFO threshold and the bus off time */
110 hostconf = ahc_inb(ahc, HOSTCONF);
111 ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
112 ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
113
114 /*
115 * Generic aic7xxx initialization.
116 */
117 if (ahc_init(ahc)) {
118 /*
119 * The board's IRQ line is not yet enabled so it's safe
120 * to release the irq.
121 */
122 return (ENXIO);
123 }
124
125 /*
126 * Enable the board's BUS drivers
127 */
128 ahc_outb(ahc, BCTL, ENABLE);
129
130 /* Attach sub-devices - always succeeds */
131 ahc_attach(ahc);
132
133 return 0;
134 }
135