bt_pci.c revision 104710 
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: head/sys/dev/buslogic/bt_pci.c 104710 2002-10-09 08:54:32Z peter $
30 */
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/bus.h>
36
37#include <pci/pcireg.h>
38#include <pci/pcivar.h>
39
40#include <machine/bus_memio.h>
41#include <machine/bus_pio.h>
42#include <machine/bus.h>
43#include <machine/resource.h>
44#include <sys/rman.h>
45
46#include <dev/buslogic/btreg.h>
47
48#define BT_PCI_IOADDR	PCIR_MAPS
49#define BT_PCI_MEMADDR	PCIR_MAPS + 4
50
51#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER	0x1040104Bul
52#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC	0x0140104Bul
53#define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT	0x8130104Bul
54
55static int
56bt_pci_alloc_resources(device_t dev)
57{
58	int		command, type = 0, rid, zero;
59	struct resource *regs = 0;
60	struct resource *irq = 0;
61
62	command = pci_read_config(dev, PCIR_COMMAND, /*bytes*/1);
63#if 0
64	/* XXX Memory Mapped I/O seems to cause problems */
65	if (command & PCIM_CMD_MEMEN) {
66		type = SYS_RES_MEMORY;
67		rid = BT_PCI_MEMADDR;
68		regs = bus_alloc_resource(dev, type, &rid,
69					  0, ~0, 1, RF_ACTIVE);
70	}
71#else
72	if (!regs && (command & PCIM_CMD_PORTEN)) {
73		type = SYS_RES_IOPORT;
74		rid = BT_PCI_IOADDR;
75		regs = bus_alloc_resource(dev, type, &rid,
76					  0, ~0, 1, RF_ACTIVE);
77	}
78#endif
79	if (!regs)
80		return (ENOMEM);
81
82	zero = 0;
83	irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero,
84				 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
85	if (!irq) {
86		bus_release_resource(dev, type, rid, regs);
87		return (ENOMEM);
88	}
89
90	bt_init_softc(dev, regs, irq, 0);
91
92	return (0);
93}
94
95static void
96bt_pci_release_resources(device_t dev)
97{
98	struct bt_softc *bt = device_get_softc(dev);
99
100	if (bt->port)
101		/* XXX can't cope with memory registers anyway */
102		bus_release_resource(dev, SYS_RES_IOPORT,
103				     BT_PCI_IOADDR, bt->port);
104	if (bt->irq)
105		bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
106	bt_free_softc(dev);
107}
108
109static int
110bt_pci_probe(device_t dev)
111{
112	switch (pci_get_devid(dev)) {
113		case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
114		case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
115		{
116			struct bt_softc   *bt = device_get_softc(dev);
117			pci_info_data_t pci_info;
118			int error;
119
120			error = bt_pci_alloc_resources(dev);
121			if (error)
122				return (error);
123
124			/*
125			 * Determine if an ISA compatible I/O port has been
126			 * enabled.  If so, record the port so it will not
127			 * be probed by our ISA probe.  If the PCI I/O port
128			 * was not set to the compatibility port, disable it.
129			 */
130			error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
131				       /*param*/NULL, /*paramlen*/0,
132				       (u_int8_t*)&pci_info, sizeof(pci_info),
133				       DEFAULT_CMD_TIMEOUT);
134			if (error == 0
135			 && pci_info.io_port < BIO_DISABLED) {
136				bt_mark_probed_bio(pci_info.io_port);
137				if (rman_get_start(bt->port) !=
138				    bt_iop_from_bio(pci_info.io_port)) {
139					u_int8_t new_addr;
140
141					new_addr = BIO_DISABLED;
142					bt_cmd(bt, BOP_MODIFY_IO_ADDR,
143					       /*param*/&new_addr,
144					       /*paramlen*/1, /*reply_buf*/NULL,
145					       /*reply_len*/0,
146					       DEFAULT_CMD_TIMEOUT);
147				}
148			}
149			bt_pci_release_resources(dev);
150			device_set_desc(dev, "Buslogic Multi-Master SCSI Host Adapter");
151			return (0);
152		}
153		default:
154			break;
155	}
156
157	return (ENXIO);
158}
159
160static int
161bt_pci_attach(device_t dev)
162{
163	struct bt_softc   *bt = device_get_softc(dev);
164	int		   opri;
165	int		   error;
166
167	/* Initialize softc */
168	error = bt_pci_alloc_resources(dev);
169	if (error) {
170		device_printf(dev, "can't allocate resources in bt_pci_attach\n");
171		return error;
172	}
173
174	/* Allocate a dmatag for our CCB DMA maps */
175	/* XXX Should be a child of the PCI bus dma tag */
176	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
177			       /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
178			       /*highaddr*/BUS_SPACE_MAXADDR,
179			       /*filter*/NULL, /*filterarg*/NULL,
180			       /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
181			       /*nsegments*/~0,
182			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
183			       /*flags*/0, &bt->parent_dmat) != 0) {
184		bt_pci_release_resources(dev);
185		return (ENOMEM);
186	}
187
188	/*
189	 * Protect ourself from spurrious interrupts during
190	 * intialization and attach.  We should really rely
191	 * on interrupts during attach, but we don't have
192	 * access to our interrupts during ISA probes, so until
193	 * that changes, we mask our interrupts during attach
194	 * too.
195	 */
196	opri = splcam();
197
198	if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
199		bt_pci_release_resources(dev);
200		splx(opri);
201		return (ENXIO);
202	}
203
204	error = bt_attach(dev);
205	splx(opri);
206
207	if (error) {
208		bt_pci_release_resources(dev);
209		return (error);
210	}
211
212	return (0);
213}
214
215static device_method_t bt_pci_methods[] = {
216	/* Device interface */
217	DEVMETHOD(device_probe,		bt_pci_probe),
218	DEVMETHOD(device_attach,	bt_pci_attach),
219
220	{ 0, 0 }
221};
222
223static driver_t bt_pci_driver = {
224	"bt",
225	bt_pci_methods,
226	sizeof(struct bt_softc),
227};
228
229static devclass_t bt_devclass;
230
231DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, 0, 0);
232