bt_mca.c revision 50826 
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 50826 1999-09-03 03:50:55Z mdodd $
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
41#include <machine/cpufunc.h>
42#include <machine/md_var.h>
43
44#include <sys/module.h>
45#include <sys/bus.h>
46
47#include <machine/bus.h>
48#include <machine/resource.h>
49#include <sys/rman.h>
50
51#include <dev/mca/mca_busreg.h>
52#include <dev/mca/mca_busvar.h>
53
54#include <i386/isa/isa_dma.h>
55
56#include <dev/buslogic/btreg.h>
57
58#include <cam/scsi/scsi_all.h>
59
60static struct mca_ident bt_mca_devs[] = {
61	{ 0x0708, "BusLogic 32 Bit Bus Master MCA-to-SCSI Host Adapter" },
62	{ 0x0708, "BusTek BT-640A Micro Channel to SCSI Host Adapter" },
63	{ 0x0708, "Storage Dimensions SDC3211B 32-bit SCSI Host Adapter" },
64	{ 0x0709, "Storage Dimensions SDC3211F 32-bit FAST SCSI Host Adapter" },
65	{ 0, NULL },
66};
67
68#define BT_MCA_IOPORT_POS1		MCA_ADP_POS(MCA_POS0)
69#define BT_MCA_IOPORT_POS2		MCA_ADP_POS(MCA_POS1)
70#define BT_MCA_IOPORT_MASK1		0x10
71#define BT_MCA_IOPORT_MASK2		0x03
72#define BT_MCA_IOPORT_SIZE		0x03
73#define BT_MCA_IOPORT(pos)		(0x30 + \
74					(((u_int32_t)pos &\
75						BT_MCA_IOPORT_MASK2) << 8) + \
76					(((u_int32_t)pos &\
77						BT_MCA_IOPORT_MASK1) >> 2))
78
79#define BT_MCA_IRQ_POS			MCA_ADP_POS(MCA_POS0)
80#define BT_MCA_IRQ_MASK			0x0e
81#define BT_MCA_IRQ(pos)			(((pos & BT_MCA_IRQ_MASK) >> 1) + 8)
82
83#define BT_MCA_DRQ_POS			MCA_ADP_POS(MCA_POS3)
84#define BT_MCA_DRQ_MASK			0x0f
85#define BT_MCA_DRQ(pos)			(pos & BT_MCA_DRQ_MASK)
86
87#define BT_MCA_SCSIID_POS		MCA_ADP_POS(MCA_POS2)
88#define BT_MCA_SCSIID_MASK		0xe0
89#define BT_MCA_SCSIID(pos)		((pos & BT_MCA_SCSIID_MASK) >> 5)
90
91static	bus_dma_filter_t	btvlbouncefilter;
92static	bus_dmamap_callback_t	btmapsensebuffers;
93
94static void
95bt_mca_release_resources (device_t dev)
96{
97	struct  bt_softc *	bt = device_get_softc(dev);
98
99	if (bt->port)
100		bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
101	if (bt->irq)
102		bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
103	if (bt->drq)
104		bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
105
106	bt_free_softc(dev);
107}
108
109static int
110bt_mca_alloc_resources(device_t dev)
111{
112	struct resource *	io = NULL;
113	struct resource *	irq = NULL;
114	struct resource *	drq = NULL;
115	int			rid;
116
117	rid = 0;
118	io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
119				0, ~0, 1, RF_ACTIVE);
120	if (io == NULL)
121		return (ENOMEM);
122
123	if (mca_get_irq(dev) != -1) {
124		rid = 0;
125		irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
126					 0, ~0, 1, RF_ACTIVE);
127		if (irq == NULL)
128			goto bad;
129	} else {
130		irq = 0;
131	}
132
133	if (mca_get_drq(dev) != -1) {
134		rid = 0;
135		drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid,
136					 0, ~0, 1, RF_ACTIVE);
137		if (drq == NULL)
138			goto bad;
139	} else {
140		drq = 0;
141	}
142
143	bt_init_softc(dev, io, irq, drq);
144
145	return (0);
146bad:
147	bt_mca_release_resources(dev);
148	return (ENOMEM);
149}
150
151static int
152bt_mca_probe (device_t dev)
153{
154	const char *		desc;
155	mca_id_t		id = mca_get_id(dev);
156	struct bt_probe_info	info;
157	u_int32_t		iobase = 0;
158	u_int32_t		iosize = 0;
159	u_int8_t		drq = 0;
160	u_int8_t		irq = 0;
161	u_int8_t		pos;
162	int			result;
163
164	desc = mca_match_id(id, bt_mca_devs);
165	if (!desc)
166		return (ENXIO);
167	device_set_desc(dev, desc);
168
169	pos = (mca_pos_read(dev, BT_MCA_IOPORT_POS1) & BT_MCA_IOPORT_MASK1) |
170	      (mca_pos_read(dev, BT_MCA_IOPORT_POS2) & BT_MCA_IOPORT_MASK2);
171	iobase = BT_MCA_IOPORT(pos);
172	iosize = BT_MCA_IOPORT_SIZE;
173
174	pos = mca_pos_read(dev, BT_MCA_DRQ_POS);
175	drq = BT_MCA_DRQ(pos);
176
177	pos = mca_pos_read(dev, BT_MCA_IRQ_POS);
178	irq = BT_MCA_IRQ(pos);
179
180	bt_mark_probed_iop(iobase);
181
182	mca_add_iospace(dev, iobase, iosize, RF_ALLOCATED);
183
184	/* And allocate them */
185	bt_mca_alloc_resources(dev);
186
187	if (bt_port_probe(dev, &info) != 0) {
188		printf("bt_mca_probe: Probe failed for "
189		       "card at slot %d\n", mca_get_slot(dev) + 1);
190		result = ENXIO;
191	} else {
192		mca_add_drq(dev, drq);
193		mca_add_irq(dev, irq);
194		result = 0;
195	}
196	bt_mca_release_resources(dev);
197
198	return (result);
199}
200
201static int
202bt_mca_attach (device_t dev)
203{
204	struct bt_softc *	bt = device_get_softc(dev);
205	int			error = 0;
206
207	/* Allocate resources */
208	if ((error = bt_mca_alloc_resources(dev))) {
209		device_printf(dev, "Unable to allocate resources in bt_mca_attach()\n");
210		return (error);
211	}
212
213	isa_dmacascade(rman_get_start(bt->drq));
214
215	/* Allocate a dmatag for our CCB DMA maps */
216	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
217			       /*lowaddr*/BUS_SPACE_MAXADDR_24BIT,
218			       /*highaddr*/BUS_SPACE_MAXADDR,
219			       /*filter*/btvlbouncefilter,
220			       /*filterarg*/bt,
221			       /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
222			       /*nsegments*/BUS_SPACE_UNRESTRICTED,
223			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
224			       /*flags*/0, &bt->parent_dmat) != 0) {
225		bt_mca_release_resources(dev);
226		return (ENOMEM);
227	}
228
229	if (bt_init(dev)) {
230		bt_mca_release_resources(dev);
231		return (ENOMEM);
232	}
233
234	/* DMA tag for our sense buffers */
235	if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1,
236			       /*boundary*/0,
237			       /*lowaddr*/BUS_SPACE_MAXADDR,
238			       /*highaddr*/BUS_SPACE_MAXADDR,
239			       /*filter*/NULL, /*filterarg*/NULL,
240			       bt->max_ccbs * sizeof(struct scsi_sense_data),
241			       /*nsegments*/1,
242			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
243			       /*flags*/0, &bt->sense_dmat) != 0) {
244		bt_mca_release_resources(dev);
245		return (ENOMEM);
246	}
247
248	bt->init_level++;
249
250	/* Allocation of sense buffers */
251	if (bus_dmamem_alloc(bt->sense_dmat,
252			     (void **)&bt->sense_buffers,
253			     BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
254		bt_mca_release_resources(dev);
255		return (ENOMEM);
256	}
257
258	bt->init_level++;
259
260	/* And permanently map them */
261	bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
262			bt->sense_buffers,
263			bt->max_ccbs * sizeof(*bt->sense_buffers),
264			btmapsensebuffers, bt, /*flags*/0);
265
266	bt->init_level++;
267
268	if ((error = bt_attach(dev))) {
269		bt_mca_release_resources(dev);
270		return (error);
271	}
272
273	return (0);
274}
275
276/*
277 * This code should be shared with the ISA
278 * stubs as its exactly the same.
279 */
280
281#define BIOS_MAP_SIZE (16 * 1024)
282
283static int
284btvlbouncefilter(void *arg, bus_addr_t addr)
285{
286	struct bt_softc *bt;
287
288	bt = (struct bt_softc *)arg;
289
290	addr &= BUS_SPACE_MAXADDR_24BIT;
291
292	if (addr == 0
293	 || (addr >= bt->bios_addr
294	  && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
295		return (1);
296	return (0);
297}
298
299static void
300btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
301{
302	struct bt_softc* bt;
303
304	bt = (struct bt_softc*)arg;
305	bt->sense_buffers_physbase = segs->ds_addr;
306}
307
308static device_method_t bt_mca_methods[] = {
309	/* Device interface */
310	DEVMETHOD(device_probe,		bt_mca_probe),
311	DEVMETHOD(device_attach,	bt_mca_attach),
312
313	{ 0, 0 }
314};
315
316static driver_t bt_mca_driver = {
317	"bt",
318	bt_mca_methods,
319	sizeof(struct bt_softc),
320};
321
322static devclass_t bt_devclass;
323
324DRIVER_MODULE(bt, mca, bt_mca_driver, bt_devclass, 0, 0);
325