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("$FreeBSD$");
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.h>
43 #include <machine/resource.h>
44 #include <sys/rman.h>
45
46 #include <isa/isavar.h>
47 #include <dev/buslogic/btreg.h>
48
49 #include <cam/scsi/scsi_all.h>
50
51 static bus_dma_filter_t btvlbouncefilter;
52 static bus_dmamap_callback_t btmapsensebuffers;
53
54 static int
bt_isa_alloc_resources(device_t dev,u_long portstart,u_long portend)55 bt_isa_alloc_resources(device_t dev, u_long portstart, u_long portend)
56 {
57 int rid;
58 struct resource *port;
59 struct resource *irq;
60 struct resource *drq;
61
62 rid = 0;
63 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
64 portstart, portend, BT_NREGS, RF_ACTIVE);
65 if (!port)
66 return (ENOMEM);
67
68 if (isa_get_irq(dev) != -1) {
69 rid = 0;
70 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
71 if (!irq) {
72 if (port)
73 bus_release_resource(dev, SYS_RES_IOPORT,
74 0, port);
75 return (ENOMEM);
76 }
77 } else
78 irq = NULL;
79
80 if (isa_get_drq(dev) != -1) {
81 rid = 0;
82 drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, &rid, RF_ACTIVE);
83 if (!drq) {
84 if (port)
85 bus_release_resource(dev, SYS_RES_IOPORT,
86 0, port);
87 if (irq)
88 bus_release_resource(dev, SYS_RES_IRQ,
89 0, irq);
90 return (ENOMEM);
91 }
92 } else
93 drq = NULL;
94
95 bt_init_softc(dev, port, irq, drq);
96
97 return (0);
98 }
99
100 static void
bt_isa_release_resources(device_t dev)101 bt_isa_release_resources(device_t dev)
102 {
103 struct bt_softc *bt = device_get_softc(dev);
104
105 if (bt->port)
106 bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
107 if (bt->irq)
108 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
109 if (bt->drq)
110 bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
111 bt_free_softc(dev);
112 }
113
114 /*
115 * Check if the device can be found at the port given
116 * and if so, set it up ready for further work
117 * as an argument, takes the isa_device structure from
118 * autoconf.c
119 */
120 static int
bt_isa_probe(device_t dev)121 bt_isa_probe(device_t dev)
122 {
123 /*
124 * find unit and check we have that many defined
125 */
126 int port_index;
127 int max_port_index;
128
129 /* No pnp support */
130 if (isa_get_vendorid(dev))
131 return (ENXIO);
132
133 port_index = 0;
134 max_port_index = BT_NUM_ISAPORTS - 1;
135 /*
136 * Bound our board search if the user has
137 * specified an exact port.
138 */
139 bt_find_probe_range(isa_get_port(dev), &port_index, &max_port_index);
140
141 if (port_index < 0)
142 return (ENXIO);
143
144 /* Attempt to find an adapter */
145 for (;port_index <= max_port_index; port_index++) {
146 struct bt_probe_info info;
147 u_int ioport;
148
149 ioport = bt_iop_from_bio(port_index);
150
151 /*
152 * Ensure this port has not already been claimed already
153 * by a PCI, EISA or ISA adapter.
154 */
155 if (bt_check_probed_iop(ioport) != 0)
156 continue;
157
158 /* Initialise the softc for use during probing */
159 if (bt_isa_alloc_resources(dev, ioport,
160 ioport + BT_NREGS -1) != 0)
161 continue;
162
163 /* We're going to attempt to probe it now, so mark it probed */
164 bt_mark_probed_bio(port_index);
165
166 if (bt_port_probe(dev, &info) != 0) {
167 if (bootverbose)
168 printf("bt_isa_probe: Probe failed at 0x%x\n",
169 ioport);
170 bt_isa_release_resources(dev);
171 continue;
172 }
173
174 bt_isa_release_resources(dev);
175
176 bus_set_resource(dev, SYS_RES_DRQ, 0, info.drq, 1);
177 bus_set_resource(dev, SYS_RES_IRQ, 0, info.irq, 1);
178
179 return (BUS_PROBE_DEFAULT);
180 }
181
182 return (ENXIO);
183 }
184
185 /*
186 * Attach all the sub-devices we can find
187 */
188 static int
bt_isa_attach(device_t dev)189 bt_isa_attach(device_t dev)
190 {
191 struct bt_softc *bt = device_get_softc(dev);
192 bus_dma_filter_t *filter;
193 void *filter_arg;
194 bus_addr_t lowaddr;
195 int error, drq;
196
197 /* Initialise softc */
198 error = bt_isa_alloc_resources(dev, 0, ~0);
199 if (error) {
200 device_printf(dev, "can't allocate resources in bt_isa_attach\n");
201 return error;
202 }
203
204 /* Program the DMA channel for external control */
205 if ((drq = isa_get_drq(dev)) != -1)
206 isa_dmacascade(drq);
207
208 /* Allocate our parent dmatag */
209 filter = NULL;
210 filter_arg = NULL;
211 lowaddr = BUS_SPACE_MAXADDR_24BIT;
212 if (bt->model[0] == '4') {
213 /*
214 * This is a VL adapter. Typically, VL devices have access
215 * to the full 32bit address space. On BT-445S adapters
216 * prior to revision E, there is a hardware bug that causes
217 * corruption of transfers to/from addresses in the range of
218 * the BIOS modulo 16MB. The only properly functioning
219 * BT-445S Host Adapters have firmware version 3.37.
220 * If we encounter one of these adapters and the BIOS is
221 * installed, install a filter function for our bus_dma_map
222 * that will catch these accesses and bounce them to a safe
223 * region of memory.
224 */
225 if (bt->bios_addr != 0
226 && strcmp(bt->model, "445S") == 0
227 && strcmp(bt->firmware_ver, "3.37") < 0) {
228 filter = btvlbouncefilter;
229 filter_arg = bt;
230 } else {
231 lowaddr = BUS_SPACE_MAXADDR_32BIT;
232 }
233 }
234
235 /* XXX Should be a child of the ISA or VL bus dma tag */
236 if (bus_dma_tag_create( /* parent */ bus_get_dma_tag(dev),
237 /* alignemnt */ 1,
238 /* boundary */ 0,
239 /* lowaddr */ lowaddr,
240 /* highaddr */ BUS_SPACE_MAXADDR,
241 /* filter */ filter,
242 /* filterarg */ filter_arg,
243 /* maxsize */ BUS_SPACE_MAXSIZE_32BIT,
244 /* nsegments */ ~0,
245 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
246 /* flags */ 0,
247 /* lockfunc */ NULL,
248 /* lockarg */ NULL,
249 &bt->parent_dmat) != 0) {
250 bt_isa_release_resources(dev);
251 return (ENOMEM);
252 }
253
254 error = bt_init(dev);
255 if (error) {
256 bt_isa_release_resources(dev);
257 return (ENOMEM);
258 }
259
260 if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
261 /* DMA tag for our sense buffers */
262 if (bus_dma_tag_create(
263 /* parent */ bt->parent_dmat,
264 /* alignment */ 1,
265 /* boundary */ 0,
266 /* lowaddr */ BUS_SPACE_MAXADDR,
267 /* highaddr */ BUS_SPACE_MAXADDR,
268 /* filter */ NULL,
269 /* filterarg */ NULL,
270 /* maxsize */ bt->max_ccbs *
271 sizeof(struct scsi_sense_data),
272 /* nsegments */ 1,
273 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
274 /* flags */ 0,
275 /* lockfunc */ NULL,
276 /* lockarg */ NULL,
277 &bt->sense_dmat) != 0) {
278 bt_isa_release_resources(dev);
279 return (ENOMEM);
280 }
281
282 bt->init_level++;
283
284 /* Allocation of sense buffers */
285 if (bus_dmamem_alloc(bt->sense_dmat,
286 (void **)&bt->sense_buffers,
287 BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
288 bt_isa_release_resources(dev);
289 return (ENOMEM);
290 }
291
292 bt->init_level++;
293
294 /* And permanently map them */
295 bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
296 bt->sense_buffers,
297 bt->max_ccbs * sizeof(*bt->sense_buffers),
298 btmapsensebuffers, bt, /*flags*/0);
299
300 bt->init_level++;
301 }
302
303 error = bt_attach(dev);
304 if (error) {
305 bt_isa_release_resources(dev);
306 return (error);
307 }
308
309 return (0);
310 }
311
312 #define BIOS_MAP_SIZE (16 * 1024)
313
314 static int
btvlbouncefilter(void * arg,bus_addr_t addr)315 btvlbouncefilter(void *arg, bus_addr_t addr)
316 {
317 struct bt_softc *bt;
318
319 bt = (struct bt_softc *)arg;
320
321 addr &= BUS_SPACE_MAXADDR_24BIT;
322
323 if (addr == 0
324 || (addr >= bt->bios_addr
325 && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
326 return (1);
327 return (0);
328 }
329
330 static void
btmapsensebuffers(void * arg,bus_dma_segment_t * segs,int nseg,int error)331 btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
332 {
333 struct bt_softc* bt;
334
335 bt = (struct bt_softc*)arg;
336 bt->sense_buffers_physbase = segs->ds_addr;
337 }
338
339 static device_method_t bt_isa_methods[] = {
340 /* Device interface */
341 DEVMETHOD(device_probe, bt_isa_probe),
342 DEVMETHOD(device_attach, bt_isa_attach),
343
344 { 0, 0 }
345 };
346
347 static driver_t bt_isa_driver = {
348 "bt",
349 bt_isa_methods,
350 sizeof(struct bt_softc),
351 };
352
353 static devclass_t bt_devclass;
354
355 DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);
356 MODULE_DEPEND(bt, isa, 1, 1, 1);
357