bt_isa.c revision 52174 
1/*
2 * Product specific probe and attach routines for:
3 *      Buslogic BT-54X and BT-445 cards
4 *
5 * Copyright (c) 1998, 1999 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 * $FreeBSD: head/sys/dev/buslogic/bt_isa.c 52174 1999-10-12 21:35:51Z dfr $
30 */
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/module.h>
36#include <sys/bus.h>
37
38#include <machine/bus_pio.h>
39#include <machine/bus.h>
40#include <machine/resource.h>
41#include <sys/rman.h>
42
43#include <isa/isavar.h>
44#include <dev/buslogic/btreg.h>
45
46#include <cam/scsi/scsi_all.h>
47
48static	bus_dma_filter_t btvlbouncefilter;
49static	bus_dmamap_callback_t btmapsensebuffers;
50
51static int
52bt_isa_alloc_resources(device_t dev, u_long portstart, u_long portend)
53{
54	int rid;
55	struct resource *port;
56	struct resource *irq;
57	struct resource *drq;
58
59	rid = 0;
60	port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
61				  portstart, portend, BT_NREGS, RF_ACTIVE);
62	if (!port)
63		return (ENOMEM);
64
65	if (isa_get_irq(dev) != -1) {
66		rid = 0;
67		irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
68					 0, ~0, 1, RF_ACTIVE);
69		if (!irq) {
70			if (port)
71				bus_release_resource(dev, SYS_RES_IOPORT,
72						     0, port);
73			return (ENOMEM);
74		}
75	} else
76		irq = 0;
77
78	if (isa_get_drq(dev) != -1) {
79		rid = 0;
80		drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid,
81					 0, ~0, 1, RF_ACTIVE);
82		if (!drq) {
83			if (port)
84				bus_release_resource(dev, SYS_RES_IOPORT,
85						     0, port);
86			if (irq)
87				bus_release_resource(dev, SYS_RES_IRQ,
88						     0, irq);
89			return (ENOMEM);
90		}
91	} else
92		drq = 0;
93
94	bt_init_softc(dev, port, irq, drq);
95
96	return (0);
97}
98
99static void
100bt_isa_release_resources(device_t dev)
101{
102	struct	bt_softc *bt = device_get_softc(dev);
103
104	if (bt->port)
105		bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
106	if (bt->irq)
107		bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
108	if (bt->drq)
109		bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
110	bt_free_softc(dev);
111}
112
113/*
114 * Check if the device can be found at the port given
115 * and if so, set it up ready for further work
116 * as an argument, takes the isa_device structure from
117 * autoconf.c
118 */
119static int
120bt_isa_probe(device_t dev)
121{
122	/*
123	 * find unit and check we have that many defined
124	 */
125	int	port_index;
126        int	max_port_index;
127
128	/* No pnp support */
129	if (isa_get_vendorid(dev))
130		return (ENXIO);
131
132	port_index = 0;
133	max_port_index = BT_NUM_ISAPORTS - 1;
134	/*
135	 * Bound our board search if the user has
136	 * specified an exact port.
137	 */
138	bt_find_probe_range(isa_get_port(dev), &port_index, &max_port_index);
139
140	if (port_index < 0)
141		return (ENXIO);
142
143	/* Attempt to find an adapter */
144	for (;port_index <= max_port_index; port_index++) {
145		struct bt_probe_info info;
146		u_int ioport;
147
148		ioport = bt_iop_from_bio(port_index);
149
150		/*
151		 * Ensure this port has not already been claimed already
152		 * by a PCI, EISA or ISA adapter.
153		 */
154		if (bt_check_probed_iop(ioport) != 0)
155			continue;
156
157		/* Initialise the softc for use during probing */
158		if (bt_isa_alloc_resources(dev, ioport,
159					   ioport + BT_NREGS -1) != 0)
160			continue;
161
162		/* We're going to attempt to probe it now, so mark it probed */
163		bt_mark_probed_bio(port_index);
164
165		if (bt_port_probe(dev, &info) != 0) {
166			if (bootverbose)
167				printf("bt_isa_probe: Probe failed at 0x%x\n",
168				       ioport);
169			bt_isa_release_resources(dev);
170			continue;
171		}
172
173		bt_isa_release_resources(dev);
174
175		bus_set_resource(dev, SYS_RES_DRQ, 0, info.drq, 1);
176		bus_set_resource(dev, SYS_RES_IRQ, 0, info.irq, 1);
177
178		return (0);
179	}
180
181	return (ENXIO);
182}
183
184/*
185 * Attach all the sub-devices we can find
186 */
187static int
188bt_isa_attach(device_t dev)
189{
190	struct	bt_softc *bt = device_get_softc(dev);
191	bus_dma_filter_t *filter;
192	void		 *filter_arg;
193	bus_addr_t	 lowaddr;
194	int		 error, drq;
195
196	/* Initialise softc */
197	error = bt_isa_alloc_resources(dev, 0, ~0);
198	if (error) {
199		device_printf(dev, "can't allocate resources in bt_isa_attach\n");
200		return error;
201	}
202
203	/* Program the DMA channel for external control */
204	if ((drq = isa_get_drq(dev)) != -1)
205		isa_dmacascade(drq);
206
207	/* Allocate our parent dmatag */
208	filter = NULL;
209	filter_arg = NULL;
210	lowaddr = BUS_SPACE_MAXADDR_24BIT;
211	if (bt->model[0] == '4') {
212		/*
213		 * This is a VL adapter.  Typically, VL devices have access
214		 * to the full 32bit address space.  On BT-445S adapters
215		 * prior to revision E, there is a hardware bug that causes
216		 * corruption of transfers to/from addresses in the range of
217		 * the BIOS modulo 16MB.  The only properly functioning
218		 * BT-445S Host Adapters have firmware version 3.37.
219		 * If we encounter one of these adapters and the BIOS is
220		 * installed, install a filter function for our bus_dma_map
221		 * that will catch these accesses and bounce them to a safe
222		 * region of memory.
223		 */
224		if (bt->bios_addr != 0
225		 && strcmp(bt->model, "445S") == 0
226		 && strcmp(bt->firmware_ver, "3.37") < 0) {
227			filter = btvlbouncefilter;
228			filter_arg = bt;
229		} else {
230			lowaddr = BUS_SPACE_MAXADDR_32BIT;
231		}
232	}
233
234	/* XXX Should be a child of the ISA or VL bus dma tag */
235	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
236                               lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
237                               filter, filter_arg,
238                               /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
239                               /*nsegments*/BUS_SPACE_UNRESTRICTED,
240                               /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
241                               /*flags*/0, &bt->parent_dmat) != 0) {
242		bt_isa_release_resources(dev);
243                return (ENOMEM);
244        }
245
246        error = bt_init(dev);
247        if (error) {
248		bt_isa_release_resources(dev);
249                return (ENOMEM);
250        }
251
252	if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
253		/* DMA tag for our sense buffers */
254		if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1,
255				       /*boundary*/0,
256				       /*lowaddr*/BUS_SPACE_MAXADDR,
257				       /*highaddr*/BUS_SPACE_MAXADDR,
258				       /*filter*/NULL, /*filterarg*/NULL,
259				       bt->max_ccbs
260					   * sizeof(struct scsi_sense_data),
261				       /*nsegments*/1,
262				       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
263				       /*flags*/0, &bt->sense_dmat) != 0) {
264			bt_isa_release_resources(dev);
265			return (ENOMEM);
266		}
267
268		bt->init_level++;
269
270		/* Allocation of sense buffers */
271		if (bus_dmamem_alloc(bt->sense_dmat,
272				     (void **)&bt->sense_buffers,
273				     BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
274			bt_isa_release_resources(dev);
275			return (ENOMEM);
276		}
277
278		bt->init_level++;
279
280		/* And permanently map them */
281		bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
282       				bt->sense_buffers,
283				bt->max_ccbs * sizeof(*bt->sense_buffers),
284				btmapsensebuffers, bt, /*flags*/0);
285
286		bt->init_level++;
287	}
288
289	error = bt_attach(dev);
290	if (error) {
291		bt_isa_release_resources(dev);
292		return (error);
293	}
294
295	return (0);
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_isa_methods[] = {
326	/* Device interface */
327	DEVMETHOD(device_probe,		bt_isa_probe),
328	DEVMETHOD(device_attach,	bt_isa_attach),
329
330	{ 0, 0 }
331};
332
333static driver_t bt_isa_driver = {
334	"bt",
335	bt_isa_methods,
336	sizeof(struct bt_softc),
337};
338
339static devclass_t bt_devclass;
340
341DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);
342