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 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD: releng/5.3/sys/dev/buslogic/bt_isa.c 127135 2004-03-17 17:50:55Z njl $");
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
38 #include <sys/lock.h>
39 #include <sys/mutex.h>
40 #include <sys/bus.h>
41
42 #include <machine/bus_pio.h>
43 #include <machine/bus.h>
44 #include <machine/resource.h>
45 #include <sys/rman.h>
46
47 #include <isa/isavar.h>
48 #include <dev/buslogic/btreg.h>
49
50 #include <cam/scsi/scsi_all.h>
51
52 static bus_dma_filter_t btvlbouncefilter;
53 static bus_dmamap_callback_t btmapsensebuffers;
54
55 static int
56 bt_isa_alloc_resources(device_t dev, u_long portstart, u_long portend)
57 {
58 int rid;
59 struct resource *port;
60 struct resource *irq;
61 struct resource *drq;
62
63 rid = 0;
64 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
65 portstart, portend, BT_NREGS, RF_ACTIVE);
66 if (!port)
67 return (ENOMEM);
68
69 if (isa_get_irq(dev) != -1) {
70 rid = 0;
71 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
72 if (!irq) {
73 if (port)
74 bus_release_resource(dev, SYS_RES_IOPORT,
75 0, port);
76 return (ENOMEM);
77 }
78 } else
79 irq = 0;
80
81 if (isa_get_drq(dev) != -1) {
82 rid = 0;
83 drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, &rid, RF_ACTIVE);
84 if (!drq) {
85 if (port)
86 bus_release_resource(dev, SYS_RES_IOPORT,
87 0, port);
88 if (irq)
89 bus_release_resource(dev, SYS_RES_IRQ,
90 0, irq);
91 return (ENOMEM);
92 }
93 } else
94 drq = 0;
95
96 bt_init_softc(dev, port, irq, drq);
97
98 return (0);
99 }
100
101 static void
102 bt_isa_release_resources(device_t dev)
103 {
104 struct bt_softc *bt = device_get_softc(dev);
105
106 if (bt->port)
107 bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
108 if (bt->irq)
109 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
110 if (bt->drq)
111 bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
112 bt_free_softc(dev);
113 }
114
115 /*
116 * Check if the device can be found at the port given
117 * and if so, set it up ready for further work
118 * as an argument, takes the isa_device structure from
119 * autoconf.c
120 */
121 static int
122 bt_isa_probe(device_t dev)
123 {
124 /*
125 * find unit and check we have that many defined
126 */
127 int port_index;
128 int max_port_index;
129
130 /* No pnp support */
131 if (isa_get_vendorid(dev))
132 return (ENXIO);
133
134 port_index = 0;
135 max_port_index = BT_NUM_ISAPORTS - 1;
136 /*
137 * Bound our board search if the user has
138 * specified an exact port.
139 */
140 bt_find_probe_range(isa_get_port(dev), &port_index, &max_port_index);
141
142 if (port_index < 0)
143 return (ENXIO);
144
145 /* Attempt to find an adapter */
146 for (;port_index <= max_port_index; port_index++) {
147 struct bt_probe_info info;
148 u_int ioport;
149
150 ioport = bt_iop_from_bio(port_index);
151
152 /*
153 * Ensure this port has not already been claimed already
154 * by a PCI, EISA or ISA adapter.
155 */
156 if (bt_check_probed_iop(ioport) != 0)
157 continue;
158
159 /* Initialise the softc for use during probing */
160 if (bt_isa_alloc_resources(dev, ioport,
161 ioport + BT_NREGS -1) != 0)
162 continue;
163
164 /* We're going to attempt to probe it now, so mark it probed */
165 bt_mark_probed_bio(port_index);
166
167 if (bt_port_probe(dev, &info) != 0) {
168 if (bootverbose)
169 printf("bt_isa_probe: Probe failed at 0x%x\n",
170 ioport);
171 bt_isa_release_resources(dev);
172 continue;
173 }
174
175 bt_isa_release_resources(dev);
176
177 bus_set_resource(dev, SYS_RES_DRQ, 0, info.drq, 1);
178 bus_set_resource(dev, SYS_RES_IRQ, 0, info.irq, 1);
179
180 return (0);
181 }
182
183 return (ENXIO);
184 }
185
186 /*
187 * Attach all the sub-devices we can find
188 */
189 static int
190 bt_isa_attach(device_t dev)
191 {
192 struct bt_softc *bt = device_get_softc(dev);
193 bus_dma_filter_t *filter;
194 void *filter_arg;
195 bus_addr_t lowaddr;
196 int error, drq;
197
198 /* Initialise softc */
199 error = bt_isa_alloc_resources(dev, 0, ~0);
200 if (error) {
201 device_printf(dev, "can't allocate resources in bt_isa_attach\n");
202 return error;
203 }
204
205 /* Program the DMA channel for external control */
206 if ((drq = isa_get_drq(dev)) != -1)
207 isa_dmacascade(drq);
208
209 /* Allocate our parent dmatag */
210 filter = NULL;
211 filter_arg = NULL;
212 lowaddr = BUS_SPACE_MAXADDR_24BIT;
213 if (bt->model[0] == '4') {
214 /*
215 * This is a VL adapter. Typically, VL devices have access
216 * to the full 32bit address space. On BT-445S adapters
217 * prior to revision E, there is a hardware bug that causes
218 * corruption of transfers to/from addresses in the range of
219 * the BIOS modulo 16MB. The only properly functioning
220 * BT-445S Host Adapters have firmware version 3.37.
221 * If we encounter one of these adapters and the BIOS is
222 * installed, install a filter function for our bus_dma_map
223 * that will catch these accesses and bounce them to a safe
224 * region of memory.
225 */
226 if (bt->bios_addr != 0
227 && strcmp(bt->model, "445S") == 0
228 && strcmp(bt->firmware_ver, "3.37") < 0) {
229 filter = btvlbouncefilter;
230 filter_arg = bt;
231 } else {
232 lowaddr = BUS_SPACE_MAXADDR_32BIT;
233 }
234 }
235
236 /* XXX Should be a child of the ISA or VL bus dma tag */
237 if (bus_dma_tag_create( /* parent */ NULL,
238 /* alignemnt */ 1,
239 /* boundary */ 0,
240 /* lowaddr */ lowaddr,
241 /* highaddr */ BUS_SPACE_MAXADDR,
242 /* filter */ filter,
243 /* filterarg */ filter_arg,
244 /* maxsize */ BUS_SPACE_MAXSIZE_32BIT,
245 /* nsegments */ ~0,
246 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
247 /* flags */ 0,
248 /* lockfunc */ busdma_lock_mutex,
249 /* lockarg */ &Giant,
250 &bt->parent_dmat) != 0) {
251 bt_isa_release_resources(dev);
252 return (ENOMEM);
253 }
254
255 error = bt_init(dev);
256 if (error) {
257 bt_isa_release_resources(dev);
258 return (ENOMEM);
259 }
260
261 if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
262 /* DMA tag for our sense buffers */
263 if (bus_dma_tag_create(
264 /* parent */ bt->parent_dmat,
265 /* alignment */ 1,
266 /* boundary */ 0,
267 /* lowaddr */ BUS_SPACE_MAXADDR,
268 /* highaddr */ BUS_SPACE_MAXADDR,
269 /* filter */ NULL,
270 /* filterarg */ NULL,
271 /* maxsize */ bt->max_ccbs *
272 sizeof(struct scsi_sense_data),
273 /* nsegments */ 1,
274 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
275 /* flags */ 0,
276 /* lockfunc */ busdma_lock_mutex,
277 /* lockarg */ &Giant,
278 &bt->sense_dmat) != 0) {
279 bt_isa_release_resources(dev);
280 return (ENOMEM);
281 }
282
283 bt->init_level++;
284
285 /* Allocation of sense buffers */
286 if (bus_dmamem_alloc(bt->sense_dmat,
287 (void **)&bt->sense_buffers,
288 BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
289 bt_isa_release_resources(dev);
290 return (ENOMEM);
291 }
292
293 bt->init_level++;
294
295 /* And permanently map them */
296 bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
297 bt->sense_buffers,
298 bt->max_ccbs * sizeof(*bt->sense_buffers),
299 btmapsensebuffers, bt, /*flags*/0);
300
301 bt->init_level++;
302 }
303
304 error = bt_attach(dev);
305 if (error) {
306 bt_isa_release_resources(dev);
307 return (error);
308 }
309
310 return (0);
311 }
312
313 #define BIOS_MAP_SIZE (16 * 1024)
314
315 static int
316 btvlbouncefilter(void *arg, bus_addr_t addr)
317 {
318 struct bt_softc *bt;
319
320 bt = (struct bt_softc *)arg;
321
322 addr &= BUS_SPACE_MAXADDR_24BIT;
323
324 if (addr == 0
325 || (addr >= bt->bios_addr
326 && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
327 return (1);
328 return (0);
329 }
330
331 static void
332 btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
333 {
334 struct bt_softc* bt;
335
336 bt = (struct bt_softc*)arg;
337 bt->sense_buffers_physbase = segs->ds_addr;
338 }
339
340 static device_method_t bt_isa_methods[] = {
341 /* Device interface */
342 DEVMETHOD(device_probe, bt_isa_probe),
343 DEVMETHOD(device_attach, bt_isa_attach),
344
345 { 0, 0 }
346 };
347
348 static driver_t bt_isa_driver = {
349 "bt",
350 bt_isa_methods,
351 sizeof(struct bt_softc),
352 };
353
354 static devclass_t bt_devclass;
355
356 DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);
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