bt_mca.c revision 135260 
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 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: head/sys/dev/buslogic/bt_mca.c 135260 2004-09-15 11:58:34Z phk $");
30
31/*
32 * Written using the bt_isa/bt_pci code as a reference.
33 *
34 * Thanks to Andy Farkas <andyf@speednet.com.au> for
35 * testing and feedback.
36 */
37
38#include <sys/types.h>
39#include <sys/param.h>
40#include <sys/systm.h>
41#include <sys/kernel.h>
42#include <sys/lock.h>
43#include <sys/mutex.h>
44
45#include <machine/cpufunc.h>
46#include <machine/md_var.h>
47
48#include <sys/module.h>
49#include <sys/bus.h>
50
51#include <machine/bus.h>
52#include <machine/resource.h>
53#include <sys/rman.h>
54
55#include <dev/mca/mca_busreg.h>
56#include <dev/mca/mca_busvar.h>
57
58#include <isa/isavar.h>
59
60#include <dev/buslogic/btreg.h>
61
62#include <cam/scsi/scsi_all.h>
63
64static struct mca_ident bt_mca_devs[] = {
65	{ 0x0708, "BusLogic 32 Bit Bus Master MCA-to-SCSI Host Adapter" },
66	{ 0x0708, "BusTek BT-640A Micro Channel to SCSI Host Adapter" },
67	{ 0x0708, "Storage Dimensions SDC3211B 32-bit SCSI Host Adapter" },
68	{ 0x0709, "Storage Dimensions SDC3211F 32-bit FAST SCSI Host Adapter" },
69	{ 0, NULL },
70};
71
72#define BT_MCA_IOPORT_POS1		MCA_ADP_POS(MCA_POS0)
73#define BT_MCA_IOPORT_POS2		MCA_ADP_POS(MCA_POS1)
74#define BT_MCA_IOPORT_MASK1		0x10
75#define BT_MCA_IOPORT_MASK2		0x03
76#define BT_MCA_IOPORT_SIZE		0x03
77#define BT_MCA_IOPORT(pos)		(0x30 + \
78					(((u_int32_t)pos &\
79						BT_MCA_IOPORT_MASK2) << 8) + \
80					(((u_int32_t)pos &\
81						BT_MCA_IOPORT_MASK1) >> 2))
82
83#define BT_MCA_IRQ_POS			MCA_ADP_POS(MCA_POS0)
84#define BT_MCA_IRQ_MASK			0x0e
85#define BT_MCA_IRQ(pos)			(((pos & BT_MCA_IRQ_MASK) >> 1) + 8)
86
87#define BT_MCA_DRQ_POS			MCA_ADP_POS(MCA_POS3)
88#define BT_MCA_DRQ_MASK			0x0f
89#define BT_MCA_DRQ(pos)			(pos & BT_MCA_DRQ_MASK)
90
91#define BT_MCA_SCSIID_POS		MCA_ADP_POS(MCA_POS2)
92#define BT_MCA_SCSIID_MASK		0xe0
93#define BT_MCA_SCSIID(pos)		((pos & BT_MCA_SCSIID_MASK) >> 5)
94
95static	bus_dma_filter_t	btvlbouncefilter;
96static	bus_dmamap_callback_t	btmapsensebuffers;
97
98static void
99bt_mca_release_resources (device_t dev)
100{
101	struct  bt_softc *	bt = device_get_softc(dev);
102
103	if (bt->port)
104		bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
105	if (bt->irq)
106		bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
107	if (bt->drq)
108		bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
109
110	bt_free_softc(dev);
111}
112
113#define BT_MCA_PROBE	0
114#define BT_MCA_ATTACH	1
115
116static int
117bt_mca_alloc_resources(device_t dev, int mode)
118{
119	struct resource *	io = NULL;
120	struct resource *	irq = NULL;
121	struct resource *	drq = NULL;
122	int			rid;
123
124	rid = 0;
125	io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
126	if (io == NULL) {
127		printf("bt_mca_alloc_resources() failed to allocate IOPORT\n");
128		return (ENOMEM);
129	}
130
131	if (mode == BT_MCA_ATTACH) {
132
133		rid = 0;
134		irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 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_any(dev, SYS_RES_DRQ, &rid, RF_ACTIVE);
142		if (drq == NULL) {
143			printf("bt_mca_alloc_resources() failed to allocate DRQ\n");
144			goto bad;
145		}
146	}
147
148	bt_init_softc(dev, io, irq, drq);
149
150	return (0);
151bad:
152	bt_mca_release_resources(dev);
153	return (ENOMEM);
154}
155
156static int
157bt_mca_probe (device_t dev)
158{
159	const char *		desc;
160	mca_id_t		id = mca_get_id(dev);
161	struct bt_probe_info	info;
162	u_int32_t		iobase = 0;
163	u_int32_t		iosize = 0;
164	u_int8_t		drq = 0;
165	u_int8_t		irq = 0;
166	u_int8_t		pos;
167	int			result;
168
169	desc = mca_match_id(id, bt_mca_devs);
170	if (!desc)
171		return (ENXIO);
172	device_set_desc(dev, desc);
173
174	pos = (mca_pos_read(dev, BT_MCA_IOPORT_POS1) & BT_MCA_IOPORT_MASK1) |
175	      (mca_pos_read(dev, BT_MCA_IOPORT_POS2) & BT_MCA_IOPORT_MASK2);
176	iobase = BT_MCA_IOPORT(pos);
177	iosize = BT_MCA_IOPORT_SIZE;
178
179	pos = mca_pos_read(dev, BT_MCA_DRQ_POS);
180	drq = BT_MCA_DRQ(pos);
181
182	pos = mca_pos_read(dev, BT_MCA_IRQ_POS);
183	irq = BT_MCA_IRQ(pos);
184
185	bt_mark_probed_iop(iobase);
186
187	mca_add_iospace(dev, iobase, iosize);
188
189	/* And allocate them */
190	bt_mca_alloc_resources(dev, BT_MCA_PROBE);
191
192	if (bt_port_probe(dev, &info) != 0) {
193		printf("bt_mca_probe: Probe failed for "
194		       "card at slot %d\n", mca_get_slot(dev) + 1);
195		result = ENXIO;
196	} else {
197		mca_add_drq(dev, drq);
198		mca_add_irq(dev, irq);
199		result = 0;
200	}
201	bt_mca_release_resources(dev);
202
203	return (result);
204}
205
206static int
207bt_mca_attach (device_t dev)
208{
209	struct bt_softc *	bt = device_get_softc(dev);
210	int			error = 0;
211
212	/* Allocate resources */
213	if ((error = bt_mca_alloc_resources(dev, BT_MCA_ATTACH))) {
214		device_printf(dev, "Unable to allocate resources in bt_mca_attach()\n");
215		return (error);
216	}
217
218	isa_dmacascade(rman_get_start(bt->drq));
219
220	/* Allocate a dmatag for our CCB DMA maps */
221	if (bus_dma_tag_create( /* parent	*/ NULL,
222				/* alignemnt	*/ 1,
223				/* boundary	*/ 0,
224				/* lowaddr	*/ BUS_SPACE_MAXADDR_24BIT,
225				/* highaddr	*/ BUS_SPACE_MAXADDR,
226				/* filter	*/ btvlbouncefilter,
227				/* filterarg	*/ bt,
228				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
229				/* nsegments	*/ ~0,
230				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
231				/* flags	*/ 0,
232				/* lockfunc	*/ busdma_lock_mutex,
233				/* lockarg	*/ &Giant,
234				&bt->parent_dmat) != 0) {
235		bt_mca_release_resources(dev);
236		return (ENOMEM);
237	}
238
239	if (bt_init(dev)) {
240		bt_mca_release_resources(dev);
241		return (ENOMEM);
242	}
243
244	/* DMA tag for our sense buffers */
245	if (bus_dma_tag_create(	/* parent	*/ bt->parent_dmat,
246				/* alignment	*/ 1,
247				/* boundary	*/ 0,
248				/* lowaddr	*/ BUS_SPACE_MAXADDR,
249				/* highaddr	*/ BUS_SPACE_MAXADDR,
250				/* filter	*/ NULL,
251				/* filterarg	*/ NULL,
252				/* maxsize	*/ bt->max_ccbs *
253						   sizeof(struct scsi_sense_data),
254				/* nsegments	*/ 1,
255				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
256				/* flags	*/ 0,
257				/* lockfunc	*/ busdma_lock_mutex,
258				/* lockarg	*/ &Giant,
259				&bt->sense_dmat) != 0) {
260		bt_mca_release_resources(dev);
261		return (ENOMEM);
262	}
263
264	bt->init_level++;
265
266	/* Allocation of sense buffers */
267	if (bus_dmamem_alloc(bt->sense_dmat,
268			     (void **)&bt->sense_buffers,
269			     BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
270		bt_mca_release_resources(dev);
271		return (ENOMEM);
272	}
273
274	bt->init_level++;
275
276	/* And permanently map them */
277	bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
278			bt->sense_buffers,
279			bt->max_ccbs * sizeof(*bt->sense_buffers),
280			btmapsensebuffers, bt, /*flags*/0);
281
282	bt->init_level++;
283
284	if ((error = bt_attach(dev))) {
285		bt_mca_release_resources(dev);
286		return (error);
287	}
288
289	return (0);
290}
291
292/*
293 * This code should be shared with the ISA
294 * stubs as its exactly the same.
295 */
296
297#define BIOS_MAP_SIZE (16 * 1024)
298
299static int
300btvlbouncefilter(void *arg, bus_addr_t addr)
301{
302	struct bt_softc *bt;
303
304	bt = (struct bt_softc *)arg;
305
306	addr &= BUS_SPACE_MAXADDR_24BIT;
307
308	if (addr == 0
309	 || (addr >= bt->bios_addr
310	  && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
311		return (1);
312	return (0);
313}
314
315static void
316btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
317{
318	struct bt_softc* bt;
319
320	bt = (struct bt_softc*)arg;
321	bt->sense_buffers_physbase = segs->ds_addr;
322}
323
324static device_method_t bt_mca_methods[] = {
325	/* Device interface */
326	DEVMETHOD(device_probe,		bt_mca_probe),
327	DEVMETHOD(device_attach,	bt_mca_attach),
328
329	{ 0, 0 }
330};
331
332static driver_t bt_mca_driver = {
333	"bt",
334	bt_mca_methods,
335	sizeof(struct bt_softc),
336};
337
338static devclass_t bt_devclass;
339
340DRIVER_MODULE(bt, mca, bt_mca_driver, bt_devclass, 0, 0);
341