bt_pci.c revision 129879 
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
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: head/sys/dev/buslogic/bt_pci.c 129879 2004-05-30 20:08:47Z phk $");
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/module.h>
37#include <sys/lock.h>
38#include <sys/mutex.h>
39#include <sys/bus.h>
40
41#include <dev/pci/pcireg.h>
42#include <dev/pci/pcivar.h>
43
44#include <machine/bus_memio.h>
45#include <machine/bus_pio.h>
46#include <machine/bus.h>
47#include <machine/resource.h>
48#include <sys/rman.h>
49
50#include <dev/buslogic/btreg.h>
51
52#define BT_PCI_IOADDR	PCIR_BAR(0)
53#define BT_PCI_MEMADDR	PCIR_BAR(1)
54
55#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER	0x1040104Bul
56#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC	0x0140104Bul
57#define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT	0x8130104Bul
58
59static int
60bt_pci_alloc_resources(device_t dev)
61{
62	int		command, type = 0, rid, zero;
63	struct resource *regs = 0;
64	struct resource *irq = 0;
65
66	command = pci_read_config(dev, PCIR_COMMAND, /*bytes*/1);
67#if 0
68	/* XXX Memory Mapped I/O seems to cause problems */
69	if (command & PCIM_CMD_MEMEN) {
70		type = SYS_RES_MEMORY;
71		rid = BT_PCI_MEMADDR;
72		regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
73	}
74#else
75	if (!regs && (command & PCIM_CMD_PORTEN)) {
76		type = SYS_RES_IOPORT;
77		rid = BT_PCI_IOADDR;
78		regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
79	}
80#endif
81	if (!regs)
82		return (ENOMEM);
83
84	zero = 0;
85	irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero,
86				     RF_ACTIVE | RF_SHAREABLE);
87	if (!irq) {
88		bus_release_resource(dev, type, rid, regs);
89		return (ENOMEM);
90	}
91
92	bt_init_softc(dev, regs, irq, 0);
93
94	return (0);
95}
96
97static void
98bt_pci_release_resources(device_t dev)
99{
100	struct bt_softc *bt = device_get_softc(dev);
101
102	if (bt->port)
103		/* XXX can't cope with memory registers anyway */
104		bus_release_resource(dev, SYS_RES_IOPORT,
105				     BT_PCI_IOADDR, bt->port);
106	if (bt->irq)
107		bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
108	bt_free_softc(dev);
109}
110
111static int
112bt_pci_probe(device_t dev)
113{
114	switch (pci_get_devid(dev)) {
115		case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
116		case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
117		{
118			struct bt_softc   *bt = device_get_softc(dev);
119			pci_info_data_t pci_info;
120			int error;
121
122			error = bt_pci_alloc_resources(dev);
123			if (error)
124				return (error);
125
126			/*
127			 * Determine if an ISA compatible I/O port has been
128			 * enabled.  If so, record the port so it will not
129			 * be probed by our ISA probe.  If the PCI I/O port
130			 * was not set to the compatibility port, disable it.
131			 */
132			error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
133				       /*param*/NULL, /*paramlen*/0,
134				       (u_int8_t*)&pci_info, sizeof(pci_info),
135				       DEFAULT_CMD_TIMEOUT);
136			if (error == 0
137			 && pci_info.io_port < BIO_DISABLED) {
138				bt_mark_probed_bio(pci_info.io_port);
139				if (rman_get_start(bt->port) !=
140				    bt_iop_from_bio(pci_info.io_port)) {
141					u_int8_t new_addr;
142
143					new_addr = BIO_DISABLED;
144					bt_cmd(bt, BOP_MODIFY_IO_ADDR,
145					       /*param*/&new_addr,
146					       /*paramlen*/1, /*reply_buf*/NULL,
147					       /*reply_len*/0,
148					       DEFAULT_CMD_TIMEOUT);
149				}
150			}
151			bt_pci_release_resources(dev);
152			device_set_desc(dev, "Buslogic Multi-Master SCSI Host Adapter");
153			return (0);
154		}
155		default:
156			break;
157	}
158
159	return (ENXIO);
160}
161
162static int
163bt_pci_attach(device_t dev)
164{
165	struct bt_softc   *bt = device_get_softc(dev);
166	int		   opri;
167	int		   error;
168
169	/* Initialize softc */
170	error = bt_pci_alloc_resources(dev);
171	if (error) {
172		device_printf(dev, "can't allocate resources in bt_pci_attach\n");
173		return error;
174	}
175
176	/* Allocate a dmatag for our CCB DMA maps */
177	/* XXX Should be a child of the PCI bus dma tag */
178	if (bus_dma_tag_create(	/* parent	*/ NULL,
179				/* alignemnt	*/ 1,
180				/* boundary	*/ 0,
181				/* lowaddr	*/ BUS_SPACE_MAXADDR_32BIT,
182				/* highaddr	*/ BUS_SPACE_MAXADDR,
183				/* filter	*/ NULL,
184				/* filterarg	*/ NULL,
185				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
186				/* nsegments	*/ ~0,
187				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
188				/* flags	*/ 0,
189				/* lockfunc	*/ busdma_lock_mutex,
190				/* lockarg	*/ &Giant,
191				&bt->parent_dmat) != 0) {
192		bt_pci_release_resources(dev);
193		return (ENOMEM);
194	}
195
196	/*
197	 * Protect ourself from spurrious interrupts during
198	 * intialization and attach.  We should really rely
199	 * on interrupts during attach, but we don't have
200	 * access to our interrupts during ISA probes, so until
201	 * that changes, we mask our interrupts during attach
202	 * too.
203	 */
204	opri = splcam();
205
206	if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
207		bt_pci_release_resources(dev);
208		splx(opri);
209		return (ENXIO);
210	}
211
212	error = bt_attach(dev);
213	splx(opri);
214
215	if (error) {
216		bt_pci_release_resources(dev);
217		return (error);
218	}
219
220	return (0);
221}
222
223static device_method_t bt_pci_methods[] = {
224	/* Device interface */
225	DEVMETHOD(device_probe,		bt_pci_probe),
226	DEVMETHOD(device_attach,	bt_pci_attach),
227
228	{ 0, 0 }
229};
230
231static driver_t bt_pci_driver = {
232	"bt",
233	bt_pci_methods,
234	sizeof(struct bt_softc),
235};
236
237static devclass_t bt_devclass;
238
239DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, 0, 0);
240