bt_pci.c revision 127135 
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 127135 2004-03-17 17:50:55Z njl $");
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/lock.h>
37#include <sys/mutex.h>
38#include <sys/bus.h>
39
40#include <dev/pci/pcireg.h>
41#include <dev/pci/pcivar.h>
42
43#include <machine/bus_memio.h>
44#include <machine/bus_pio.h>
45#include <machine/bus.h>
46#include <machine/resource.h>
47#include <sys/rman.h>
48
49#include <dev/buslogic/btreg.h>
50
51#define BT_PCI_IOADDR	PCIR_BAR(0)
52#define BT_PCI_MEMADDR	PCIR_BAR(1)
53
54#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER	0x1040104Bul
55#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC	0x0140104Bul
56#define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT	0x8130104Bul
57
58static int
59bt_pci_alloc_resources(device_t dev)
60{
61	int		command, type = 0, rid, zero;
62	struct resource *regs = 0;
63	struct resource *irq = 0;
64
65	command = pci_read_config(dev, PCIR_COMMAND, /*bytes*/1);
66#if 0
67	/* XXX Memory Mapped I/O seems to cause problems */
68	if (command & PCIM_CMD_MEMEN) {
69		type = SYS_RES_MEMORY;
70		rid = BT_PCI_MEMADDR;
71		regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
72	}
73#else
74	if (!regs && (command & PCIM_CMD_PORTEN)) {
75		type = SYS_RES_IOPORT;
76		rid = BT_PCI_IOADDR;
77		regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
78	}
79#endif
80	if (!regs)
81		return (ENOMEM);
82
83	zero = 0;
84	irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero,
85				     RF_ACTIVE | RF_SHAREABLE);
86	if (!irq) {
87		bus_release_resource(dev, type, rid, regs);
88		return (ENOMEM);
89	}
90
91	bt_init_softc(dev, regs, irq, 0);
92
93	return (0);
94}
95
96static void
97bt_pci_release_resources(device_t dev)
98{
99	struct bt_softc *bt = device_get_softc(dev);
100
101	if (bt->port)
102		/* XXX can't cope with memory registers anyway */
103		bus_release_resource(dev, SYS_RES_IOPORT,
104				     BT_PCI_IOADDR, bt->port);
105	if (bt->irq)
106		bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
107	bt_free_softc(dev);
108}
109
110static int
111bt_pci_probe(device_t dev)
112{
113	switch (pci_get_devid(dev)) {
114		case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
115		case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
116		{
117			struct bt_softc   *bt = device_get_softc(dev);
118			pci_info_data_t pci_info;
119			int error;
120
121			error = bt_pci_alloc_resources(dev);
122			if (error)
123				return (error);
124
125			/*
126			 * Determine if an ISA compatible I/O port has been
127			 * enabled.  If so, record the port so it will not
128			 * be probed by our ISA probe.  If the PCI I/O port
129			 * was not set to the compatibility port, disable it.
130			 */
131			error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
132				       /*param*/NULL, /*paramlen*/0,
133				       (u_int8_t*)&pci_info, sizeof(pci_info),
134				       DEFAULT_CMD_TIMEOUT);
135			if (error == 0
136			 && pci_info.io_port < BIO_DISABLED) {
137				bt_mark_probed_bio(pci_info.io_port);
138				if (rman_get_start(bt->port) !=
139				    bt_iop_from_bio(pci_info.io_port)) {
140					u_int8_t new_addr;
141
142					new_addr = BIO_DISABLED;
143					bt_cmd(bt, BOP_MODIFY_IO_ADDR,
144					       /*param*/&new_addr,
145					       /*paramlen*/1, /*reply_buf*/NULL,
146					       /*reply_len*/0,
147					       DEFAULT_CMD_TIMEOUT);
148				}
149			}
150			bt_pci_release_resources(dev);
151			device_set_desc(dev, "Buslogic Multi-Master SCSI Host Adapter");
152			return (0);
153		}
154		default:
155			break;
156	}
157
158	return (ENXIO);
159}
160
161static int
162bt_pci_attach(device_t dev)
163{
164	struct bt_softc   *bt = device_get_softc(dev);
165	int		   opri;
166	int		   error;
167
168	/* Initialize softc */
169	error = bt_pci_alloc_resources(dev);
170	if (error) {
171		device_printf(dev, "can't allocate resources in bt_pci_attach\n");
172		return error;
173	}
174
175	/* Allocate a dmatag for our CCB DMA maps */
176	/* XXX Should be a child of the PCI bus dma tag */
177	if (bus_dma_tag_create(	/* parent	*/ NULL,
178				/* alignemnt	*/ 1,
179				/* boundary	*/ 0,
180				/* lowaddr	*/ BUS_SPACE_MAXADDR_32BIT,
181				/* highaddr	*/ BUS_SPACE_MAXADDR,
182				/* filter	*/ NULL,
183				/* filterarg	*/ NULL,
184				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
185				/* nsegments	*/ ~0,
186				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
187				/* flags	*/ 0,
188				/* lockfunc	*/ busdma_lock_mutex,
189				/* lockarg	*/ &Giant,
190				&bt->parent_dmat) != 0) {
191		bt_pci_release_resources(dev);
192		return (ENOMEM);
193	}
194
195	/*
196	 * Protect ourself from spurrious interrupts during
197	 * intialization and attach.  We should really rely
198	 * on interrupts during attach, but we don't have
199	 * access to our interrupts during ISA probes, so until
200	 * that changes, we mask our interrupts during attach
201	 * too.
202	 */
203	opri = splcam();
204
205	if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
206		bt_pci_release_resources(dev);
207		splx(opri);
208		return (ENXIO);
209	}
210
211	error = bt_attach(dev);
212	splx(opri);
213
214	if (error) {
215		bt_pci_release_resources(dev);
216		return (error);
217	}
218
219	return (0);
220}
221
222static device_method_t bt_pci_methods[] = {
223	/* Device interface */
224	DEVMETHOD(device_probe,		bt_pci_probe),
225	DEVMETHOD(device_attach,	bt_pci_attach),
226
227	{ 0, 0 }
228};
229
230static driver_t bt_pci_driver = {
231	"bt",
232	bt_pci_methods,
233	sizeof(struct bt_softc),
234};
235
236static devclass_t bt_devclass;
237
238DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, 0, 0);
239