bt_mca.c revision 117126 
1/*-
2 * Copyright (c) 1999 Matthew N. Dodd <winter@jurai.net>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/buslogic/bt_mca.c 117126 2003-07-01 15:52:06Z scottl $
27 */
28
29/*
30 * Written using the bt_isa/bt_pci code as a reference.
31 *
32 * Thanks to Andy Farkas <andyf@speednet.com.au> for
33 * testing and feedback.
34 */
35
36#include <sys/types.h>
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <sys/lock.h>
41#include <sys/mutex.h>
42
43#include <machine/cpufunc.h>
44#include <machine/md_var.h>
45
46#include <sys/module.h>
47#include <sys/bus.h>
48
49#include <machine/bus.h>
50#include <machine/resource.h>
51#include <sys/rman.h>
52
53#include <dev/mca/mca_busreg.h>
54#include <dev/mca/mca_busvar.h>
55
56#include <i386/isa/isa_dma.h>
57
58#include <dev/buslogic/btreg.h>
59
60#include <cam/scsi/scsi_all.h>
61
62static struct mca_ident bt_mca_devs[] = {
63	{ 0x0708, "BusLogic 32 Bit Bus Master MCA-to-SCSI Host Adapter" },
64	{ 0x0708, "BusTek BT-640A Micro Channel to SCSI Host Adapter" },
65	{ 0x0708, "Storage Dimensions SDC3211B 32-bit SCSI Host Adapter" },
66	{ 0x0709, "Storage Dimensions SDC3211F 32-bit FAST SCSI Host Adapter" },
67	{ 0, NULL },
68};
69
70#define BT_MCA_IOPORT_POS1		MCA_ADP_POS(MCA_POS0)
71#define BT_MCA_IOPORT_POS2		MCA_ADP_POS(MCA_POS1)
72#define BT_MCA_IOPORT_MASK1		0x10
73#define BT_MCA_IOPORT_MASK2		0x03
74#define BT_MCA_IOPORT_SIZE		0x03
75#define BT_MCA_IOPORT(pos)		(0x30 + \
76					(((u_int32_t)pos &\
77						BT_MCA_IOPORT_MASK2) << 8) + \
78					(((u_int32_t)pos &\
79						BT_MCA_IOPORT_MASK1) >> 2))
80
81#define BT_MCA_IRQ_POS			MCA_ADP_POS(MCA_POS0)
82#define BT_MCA_IRQ_MASK			0x0e
83#define BT_MCA_IRQ(pos)			(((pos & BT_MCA_IRQ_MASK) >> 1) + 8)
84
85#define BT_MCA_DRQ_POS			MCA_ADP_POS(MCA_POS3)
86#define BT_MCA_DRQ_MASK			0x0f
87#define BT_MCA_DRQ(pos)			(pos & BT_MCA_DRQ_MASK)
88
89#define BT_MCA_SCSIID_POS		MCA_ADP_POS(MCA_POS2)
90#define BT_MCA_SCSIID_MASK		0xe0
91#define BT_MCA_SCSIID(pos)		((pos & BT_MCA_SCSIID_MASK) >> 5)
92
93static	bus_dma_filter_t	btvlbouncefilter;
94static	bus_dmamap_callback_t	btmapsensebuffers;
95
96static void
97bt_mca_release_resources (device_t dev)
98{
99	struct  bt_softc *	bt = device_get_softc(dev);
100
101	if (bt->port)
102		bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
103	if (bt->irq)
104		bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
105	if (bt->drq)
106		bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
107
108	bt_free_softc(dev);
109}
110
111#define BT_MCA_PROBE	0
112#define BT_MCA_ATTACH	1
113
114static int
115bt_mca_alloc_resources(device_t dev, int mode)
116{
117	struct resource *	io = NULL;
118	struct resource *	irq = NULL;
119	struct resource *	drq = NULL;
120	int			rid;
121
122	rid = 0;
123	io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
124				0, ~0, 1, RF_ACTIVE);
125	if (io == NULL) {
126		printf("bt_mca_alloc_resources() failed to allocate IOPORT\n");
127		return (ENOMEM);
128	}
129
130	if (mode == BT_MCA_ATTACH) {
131
132		rid = 0;
133		irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
134					 0, ~0, 1, RF_ACTIVE);
135		if (irq == NULL) {
136			printf("bt_mca_alloc_resources() failed to allocate IRQ\n");
137			goto bad;
138		}
139
140		rid = 0;
141		drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid,
142						 0, ~0, 1, RF_ACTIVE);
143		if (drq == NULL) {
144			printf("bt_mca_alloc_resources() failed to allocate DRQ\n");
145			goto bad;
146		}
147	}
148
149	bt_init_softc(dev, io, irq, drq);
150
151	return (0);
152bad:
153	bt_mca_release_resources(dev);
154	return (ENOMEM);
155}
156
157static int
158bt_mca_probe (device_t dev)
159{
160	const char *		desc;
161	mca_id_t		id = mca_get_id(dev);
162	struct bt_probe_info	info;
163	u_int32_t		iobase = 0;
164	u_int32_t		iosize = 0;
165	u_int8_t		drq = 0;
166	u_int8_t		irq = 0;
167	u_int8_t		pos;
168	int			result;
169
170	desc = mca_match_id(id, bt_mca_devs);
171	if (!desc)
172		return (ENXIO);
173	device_set_desc(dev, desc);
174
175	pos = (mca_pos_read(dev, BT_MCA_IOPORT_POS1) & BT_MCA_IOPORT_MASK1) |
176	      (mca_pos_read(dev, BT_MCA_IOPORT_POS2) & BT_MCA_IOPORT_MASK2);
177	iobase = BT_MCA_IOPORT(pos);
178	iosize = BT_MCA_IOPORT_SIZE;
179
180	pos = mca_pos_read(dev, BT_MCA_DRQ_POS);
181	drq = BT_MCA_DRQ(pos);
182
183	pos = mca_pos_read(dev, BT_MCA_IRQ_POS);
184	irq = BT_MCA_IRQ(pos);
185
186	bt_mark_probed_iop(iobase);
187
188	mca_add_iospace(dev, iobase, iosize);
189
190	/* And allocate them */
191	bt_mca_alloc_resources(dev, BT_MCA_PROBE);
192
193	if (bt_port_probe(dev, &info) != 0) {
194		printf("bt_mca_probe: Probe failed for "
195		       "card at slot %d\n", mca_get_slot(dev) + 1);
196		result = ENXIO;
197	} else {
198		mca_add_drq(dev, drq);
199		mca_add_irq(dev, irq);
200		result = 0;
201	}
202	bt_mca_release_resources(dev);
203
204	return (result);
205}
206
207static int
208bt_mca_attach (device_t dev)
209{
210	struct bt_softc *	bt = device_get_softc(dev);
211	int			error = 0;
212
213	/* Allocate resources */
214	if ((error = bt_mca_alloc_resources(dev, BT_MCA_ATTACH))) {
215		device_printf(dev, "Unable to allocate resources in bt_mca_attach()\n");
216		return (error);
217	}
218
219	isa_dmacascade(rman_get_start(bt->drq));
220
221	/* Allocate a dmatag for our CCB DMA maps */
222	if (bus_dma_tag_create( /* parent	*/ NULL,
223				/* alignemnt	*/ 1,
224				/* boundary	*/ 0,
225				/* lowaddr	*/ BUS_SPACE_MAXADDR_24BIT,
226				/* highaddr	*/ BUS_SPACE_MAXADDR,
227				/* filter	*/ btvlbouncefilter,
228				/* filterarg	*/ bt,
229				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
230				/* nsegments	*/ ~0,
231				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
232				/* flags	*/ 0,
233				/* lockfunc	*/ busdma_lock_mutex,
234				/* lockarg	*/ &Giant,
235				&bt->parent_dmat) != 0) {
236		bt_mca_release_resources(dev);
237		return (ENOMEM);
238	}
239
240	if (bt_init(dev)) {
241		bt_mca_release_resources(dev);
242		return (ENOMEM);
243	}
244
245	/* DMA tag for our sense buffers */
246	if (bus_dma_tag_create(	/* parent	*/ bt->parent_dmat,
247				/* alignment	*/ 1,
248				/* boundary	*/ 0,
249				/* lowaddr	*/ BUS_SPACE_MAXADDR,
250				/* highaddr	*/ BUS_SPACE_MAXADDR,
251				/* filter	*/ NULL,
252				/* filterarg	*/ NULL,
253				/* maxsize	*/ bt->max_ccbs *
254						   sizeof(struct scsi_sense_data),
255				/* nsegments	*/ 1,
256				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
257				/* flags	*/ 0,
258				/* lockfunc	*/ busdma_lock_mutex,
259				/* lockarg	*/ &Giant,
260				&bt->sense_dmat) != 0) {
261		bt_mca_release_resources(dev);
262		return (ENOMEM);
263	}
264
265	bt->init_level++;
266
267	/* Allocation of sense buffers */
268	if (bus_dmamem_alloc(bt->sense_dmat,
269			     (void **)&bt->sense_buffers,
270			     BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
271		bt_mca_release_resources(dev);
272		return (ENOMEM);
273	}
274
275	bt->init_level++;
276
277	/* And permanently map them */
278	bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
279			bt->sense_buffers,
280			bt->max_ccbs * sizeof(*bt->sense_buffers),
281			btmapsensebuffers, bt, /*flags*/0);
282
283	bt->init_level++;
284
285	if ((error = bt_attach(dev))) {
286		bt_mca_release_resources(dev);
287		return (error);
288	}
289
290	return (0);
291}
292
293/*
294 * This code should be shared with the ISA
295 * stubs as its exactly the same.
296 */
297
298#define BIOS_MAP_SIZE (16 * 1024)
299
300static int
301btvlbouncefilter(void *arg, bus_addr_t addr)
302{
303	struct bt_softc *bt;
304
305	bt = (struct bt_softc *)arg;
306
307	addr &= BUS_SPACE_MAXADDR_24BIT;
308
309	if (addr == 0
310	 || (addr >= bt->bios_addr
311	  && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
312		return (1);
313	return (0);
314}
315
316static void
317btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
318{
319	struct bt_softc* bt;
320
321	bt = (struct bt_softc*)arg;
322	bt->sense_buffers_physbase = segs->ds_addr;
323}
324
325static device_method_t bt_mca_methods[] = {
326	/* Device interface */
327	DEVMETHOD(device_probe,		bt_mca_probe),
328	DEVMETHOD(device_attach,	bt_mca_attach),
329
330	{ 0, 0 }
331};
332
333static driver_t bt_mca_driver = {
334	"bt",
335	bt_mca_methods,
336	sizeof(struct bt_softc),
337};
338
339static devclass_t bt_devclass;
340
341DRIVER_MODULE(bt, mca, bt_mca_driver, bt_devclass, 0, 0);
342