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 * $Id: bt_isa.c,v 1.12 1999/05/22 15:45:47 dfr Exp $
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 <i386/isa/isa_dma.h>
45#include <dev/buslogic/btreg.h>
46
47#include <cam/scsi/scsi_all.h>
48
49static bus_dma_filter_t btvlbouncefilter;
50static bus_dmamap_callback_t btmapsensebuffers;
51
52static int
53bt_isa_alloc_resources(device_t dev, u_long portstart, u_long portend)
54{
55 int rid;
56 struct resource *port;
57 struct resource *irq;
58 struct resource *drq;
59
60 rid = 0;
61 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
62 portstart, portend, BT_NREGS, RF_ACTIVE);
63 if (!port)
64 return (ENOMEM);
65
66 if (isa_get_irq(dev) != -1) {
67 rid = 0;
68 irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
69 0, ~0, 1, RF_ACTIVE);
70 if (!irq) {
71 if (port)
72 bus_release_resource(dev, SYS_RES_IOPORT,
73 0, port);
74 return (ENOMEM);
75 }
76 } else
77 irq = 0;
78
79 if (isa_get_drq(dev) != -1) {
80 rid = 0;
81 drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid,
82 0, ~0, 1, 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 = 0;
94
95 bt_init_softc(dev, port, irq, drq);
96
97 return (0);
98}
99
100static void
101bt_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 */
120static int
121bt_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 printf("bt_isa_probe: Probe failed for card at 0x%x\n",
168 ioport);
169 bt_isa_release_resources(dev);
170 continue;
171 }
172
173 bt_isa_release_resources(dev);
174
175 ISA_SET_RESOURCE(device_get_parent(dev), dev,
176 SYS_RES_DRQ, 0, info.drq, 1);
177 ISA_SET_RESOURCE(device_get_parent(dev), dev,
178 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 */
189static int
190bt_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, /*alignemnt*/0, /*boundary*/0,
238 lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
239 filter, filter_arg,
240 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
241 /*nsegments*/BUS_SPACE_UNRESTRICTED,
242 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
243 /*flags*/0, &bt->parent_dmat) != 0) {
244 bt_isa_release_resources(dev);
245 return (ENOMEM);
246 }
247
248 error = bt_init(dev);
249 if (error) {
250 bt_isa_release_resources(dev);
251 return (ENOMEM);
252 }
253
254 if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
255 /* DMA tag for our sense buffers */
256 if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/0,
257 /*boundary*/0,
258 /*lowaddr*/BUS_SPACE_MAXADDR,
259 /*highaddr*/BUS_SPACE_MAXADDR,
260 /*filter*/NULL, /*filterarg*/NULL,
261 bt->max_ccbs
262 * sizeof(struct scsi_sense_data),
263 /*nsegments*/1,
264 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
265 /*flags*/0, &bt->sense_dmat) != 0) {
266 bt_isa_release_resources(dev);
267 return (ENOMEM);
268 }
269
270 bt->init_level++;
271
272 /* Allocation of sense buffers */
273 if (bus_dmamem_alloc(bt->sense_dmat,
274 (void **)&bt->sense_buffers,
275 BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
276 bt_isa_release_resources(dev);
277 return (ENOMEM);
278 }
279
280 bt->init_level++;
281
282 /* And permanently map them */
283 bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
284 bt->sense_buffers,
285 bt->max_ccbs * sizeof(*bt->sense_buffers),
286 btmapsensebuffers, bt, /*flags*/0);
287
288 bt->init_level++;
289 }
290
291 error = bt_attach(dev);
292 if (error) {
293 bt_isa_release_resources(dev);
294 return (error);
295 }
296
297 return (0);
298}
299
300#define BIOS_MAP_SIZE (16 * 1024)
301
302static int
303btvlbouncefilter(void *arg, bus_addr_t addr)
304{
305 struct bt_softc *bt;
306
307 bt = (struct bt_softc *)arg;
308
309 addr &= BUS_SPACE_MAXADDR_24BIT;
310
311 if (addr == 0
312 || (addr >= bt->bios_addr
313 && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
314 return (1);
315 return (0);
316}
317
318static void
319btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
320{
321 struct bt_softc* bt;
322
323 bt = (struct bt_softc*)arg;
324 bt->sense_buffers_physbase = segs->ds_addr;
325}
326
327static device_method_t bt_isa_methods[] = {
328 /* Device interface */
329 DEVMETHOD(device_probe, bt_isa_probe),
330 DEVMETHOD(device_attach, bt_isa_attach),
331
332 { 0, 0 }
333};
334
335static driver_t bt_isa_driver = {
336 "bt",
337 bt_isa_methods,
338 sizeof(struct bt_softc),
339};
340
341static devclass_t bt_devclass;
342
343DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);