FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/aic77xx.c
1 /* $NetBSD: aic77xx.c,v 1.6 2005/12/11 12:21:25 christos 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 1.6 2005/12/11 12:21:25 christos Exp $");
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/device.h>
39
40 #include <machine/bus.h>
41 #include <machine/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
56 ahc_aic77xx_irq(iot, ioh)
57 bus_space_tag_t iot;
58 bus_space_handle_t ioh;
59 {
60 int irq;
61 u_int8_t intdef;
62 u_int8_t hcntrl;
63
64 /* Pause the card preseving the IRQ type */
65 hcntrl = bus_space_read_1(iot, ioh, HCNTRL) & IRQMS;
66 bus_space_write_1(iot, ioh, HCNTRL, hcntrl | PAUSE);
67
68 intdef = bus_space_read_1(iot, ioh, INTDEF);
69 irq = (intdef & INTDEF_IRQ_MASK);
70 switch (irq) {
71 case 9:
72 case 10:
73 case 11:
74 case 12:
75 case 14:
76 case 15:
77 break;
78 default:
79 printf("ahc_aic77xx_irq: illegal irq setting %d\n", intdef);
80 return (-1);
81 }
82
83 return (irq);
84 }
85
86 int
87 ahc_aic77xx_attach(ahc)
88 struct ahc_softc *ahc;
89 {
90 u_int8_t sblkctl;
91 u_int8_t sblkctl_orig;
92 u_int8_t hostconf;
93
94 /*
95 * See if we have a Rev E or higher aic7770. Anything below a
96 * Rev E will have a R/O autoflush disable configuration bit.
97 */
98 sblkctl_orig = ahc_inb(ahc, SBLKCTL);
99 sblkctl = sblkctl_orig ^ AUTOFLUSHDIS;
100 ahc_outb(ahc, SBLKCTL, sblkctl);
101 sblkctl = ahc_inb(ahc, SBLKCTL);
102 if (sblkctl != sblkctl_orig) {
103 printf("%s: aic7770 >= Rev E: R/O autoflush enabled\n",
104 ahc_name(ahc));
105 /*
106 * Ensure autoflush is enabled
107 */
108 sblkctl &= ~AUTOFLUSHDIS;
109 ahc_outb(ahc, SBLKCTL, sblkctl);
110 }
111
112 /* Setup the FIFO threshold and the bus off time */
113 hostconf = ahc_inb(ahc, HOSTCONF);
114 ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
115 ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
116
117 /*
118 * Generic aic7xxx initialization.
119 */
120 if (ahc_init(ahc)) {
121 /*
122 * The board's IRQ line is not yet enabled so it's safe
123 * to release the irq.
124 */
125 return (ENXIO);
126 }
127
128 /*
129 * Enable the board's BUS drivers
130 */
131 ahc_outb(ahc, BCTL, ENABLE);
132
133 /* Attach sub-devices - always succeeds */
134 ahc_attach(ahc);
135
136 return 0;
137 }
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