1 /*-
2 * Product specific probe and attach routines for:
3 * Buslogic BT946, BT948, BT956, BT958 SCSI controllers
4 *
5 * Copyright (c) 1995, 1997, 1998 Justin T. Gibbs
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification, immediately at the beginning of the file.
14 * 2. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/sys/dev/buslogic/bt_pci.c,v 1.25 2012/11/17 01:51:40 svnexp Exp $
30 */
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/bus.h>
37 #include <sys/rman.h>
38
39 #include <bus/pci/pcireg.h>
40 #include <bus/pci/pcivar.h>
41
42 #include "btreg.h"
43
44 #define BT_PCI_IOADDR PCIR_BAR(0)
45 #define BT_PCI_MEMADDR PCIR_BAR(1)
46
47 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER 0x1040104Bul
48 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC 0x0140104Bul
49
50 static int
bt_pci_alloc_resources(device_t dev)51 bt_pci_alloc_resources(device_t dev)
52 {
53 int command, type = 0, rid, zero;
54 struct resource *regs = NULL;
55 struct resource *irq = NULL;
56
57 command = pci_read_config(dev, PCIR_COMMAND, /*bytes*/1);
58 #if 0
59 /* XXX Memory Mapped I/O seems to cause problems */
60 if (command & PCIM_CMD_MEMEN) {
61 type = SYS_RES_MEMORY;
62 rid = BT_PCI_MEMADDR;
63 regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
64 }
65 #else
66 if (!regs && (command & PCIM_CMD_PORTEN)) {
67 type = SYS_RES_IOPORT;
68 rid = BT_PCI_IOADDR;
69 regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
70 }
71 #endif
72 if (!regs)
73 return (ENOMEM);
74
75 zero = 0;
76 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero,
77 RF_ACTIVE | RF_SHAREABLE);
78 if (!irq) {
79 bus_release_resource(dev, type, rid, regs);
80 return (ENOMEM);
81 }
82
83 bt_init_softc(dev, regs, irq, 0);
84
85 return (0);
86 }
87
88 static void
bt_pci_release_resources(device_t dev)89 bt_pci_release_resources(device_t dev)
90 {
91 struct bt_softc *bt = device_get_softc(dev);
92
93 if (bt->port)
94 /* XXX can't cope with memory registers anyway */
95 bus_release_resource(dev, SYS_RES_IOPORT,
96 BT_PCI_IOADDR, bt->port);
97 if (bt->irq)
98 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
99 bt_free_softc(dev);
100 }
101
102 static int
bt_pci_probe(device_t dev)103 bt_pci_probe(device_t dev)
104 {
105 switch (pci_get_devid(dev)) {
106 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
107 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
108 device_set_desc(dev,
109 "Buslogic Multi-Master SCSI Host Adapter");
110 break;
111 default:
112 return (ENXIO);
113 }
114
115 return (BUS_PROBE_DEFAULT);
116 }
117
118 static int
bt_pci_attach(device_t dev)119 bt_pci_attach(device_t dev)
120 {
121 struct bt_softc *bt = device_get_softc(dev);
122 int error;
123
124 /* Initialize softc */
125 error = bt_pci_alloc_resources(dev);
126 if (error) {
127 device_printf(dev, "can't allocate resources in bt_pci_attach\n");
128 return error;
129 }
130
131 /* Allocate a dmatag for our CCB DMA maps */
132 /* XXX Should be a child of the PCI bus dma tag */
133 if (bus_dma_tag_create( /* parent */ NULL,
134 /* alignemnt */ 1,
135 /* boundary */ 0,
136 /* lowaddr */ BUS_SPACE_MAXADDR_32BIT,
137 /* highaddr */ BUS_SPACE_MAXADDR,
138 /* maxsize */ BUS_SPACE_MAXSIZE_32BIT,
139 /* nsegments */ ~0,
140 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
141 /* flags */ 0,
142 &bt->parent_dmat) != 0) {
143 bt_pci_release_resources(dev);
144 return (ENOMEM);
145 }
146
147 if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
148 bt_pci_release_resources(dev);
149 return (ENXIO);
150 }
151
152 error = bt_attach(dev);
153
154 if (error) {
155 bt_pci_release_resources(dev);
156 return (error);
157 }
158
159 return (0);
160 }
161
162 static device_method_t bt_pci_methods[] = {
163 /* Device interface */
164 DEVMETHOD(device_probe, bt_pci_probe),
165 DEVMETHOD(device_attach, bt_pci_attach),
166
167 DEVMETHOD_END
168 };
169
170 static driver_t bt_pci_driver = {
171 "bt",
172 bt_pci_methods,
173 sizeof(struct bt_softc),
174 };
175
176 static devclass_t bt_devclass;
177
178 DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, NULL, NULL);
179 MODULE_DEPEND(bt, pci, 1, 1, 1);
180