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 1.11 1999/05/08 21:59:23 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 port_index = 0;
130 max_port_index = BT_NUM_ISAPORTS - 1;
131 /*
132 * Bound our board search if the user has
133 * specified an exact port.
134 */
135 bt_find_probe_range(isa_get_port(dev), &port_index, &max_port_index);
136
137 if (port_index < 0)
138 return (ENXIO);
139
140 /* Attempt to find an adapter */
141 for (;port_index <= max_port_index; port_index++) {
142 struct bt_probe_info info;
143 u_int ioport;
144
145 ioport = bt_iop_from_bio(port_index);
146
147 /*
148 * Ensure this port has not already been claimed already
149 * by a PCI, EISA or ISA adapter.
150 */
151 if (bt_check_probed_iop(ioport) != 0)
152 continue;
153
154 /* Initialise the softc for use during probing */
155 if (bt_isa_alloc_resources(dev, ioport,
156 ioport + BT_NREGS -1) != 0)
157 continue;
158
159 /* We're going to attempt to probe it now, so mark it probed */
160 bt_mark_probed_bio(port_index);
161
162 if (bt_port_probe(dev, &info) != 0) {
163 printf("bt_isa_probe: Probe failed for card at 0x%x\n",
164 ioport);
165 bt_isa_release_resources(dev);
166 continue;
167 }
168
169 bt_isa_release_resources(dev);
170
171 ISA_SET_RESOURCE(device_get_parent(dev), dev,
172 SYS_RES_DRQ, 0, info.drq, 1);
173 ISA_SET_RESOURCE(device_get_parent(dev), dev,
174 SYS_RES_IRQ, 0, info.irq, 1);
175
176 return (0);
177 }
178
179 return (ENXIO);
180}
181
182/*
183 * Attach all the sub-devices we can find
184 */
185static int
186bt_isa_attach(device_t dev)
187{
188 struct bt_softc *bt = device_get_softc(dev);
189 bus_dma_filter_t *filter;
190 void *filter_arg;
191 bus_addr_t lowaddr;
192 int error, drq;
193
194 /* Initialise softc */
195 error = bt_isa_alloc_resources(dev, 0, ~0);
196 if (error) {
197 device_printf(dev, "can't allocate resources in bt_isa_attach\n");
198 return error;
199 }
200
201 /* Program the DMA channel for external control */
202 if ((drq = isa_get_drq(dev)) != -1)
203 isa_dmacascade(drq);
204
205 /* Allocate our parent dmatag */
206 filter = NULL;
207 filter_arg = NULL;
208 lowaddr = BUS_SPACE_MAXADDR_24BIT;
209 if (bt->model[0] == '4') {
210 /*
211 * This is a VL adapter. Typically, VL devices have access
212 * to the full 32bit address space. On BT-445S adapters
213 * prior to revision E, there is a hardware bug that causes
214 * corruption of transfers to/from addresses in the range of
215 * the BIOS modulo 16MB. The only properly functioning
216 * BT-445S Host Adapters have firmware version 3.37.
217 * If we encounter one of these adapters and the BIOS is
218 * installed, install a filter function for our bus_dma_map
219 * that will catch these accesses and bounce them to a safe
220 * region of memory.
221 */
222 if (bt->bios_addr != 0
223 && strcmp(bt->model, "445S") == 0
224 && strcmp(bt->firmware_ver, "3.37") < 0) {
225 filter = btvlbouncefilter;
226 filter_arg = bt;
227 } else {
228 lowaddr = BUS_SPACE_MAXADDR_32BIT;
229 }
230 }
231
232 /* XXX Should be a child of the ISA or VL bus dma tag */
233 if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/0, /*boundary*/0,
234 lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
235 filter, filter_arg,
236 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
237 /*nsegments*/BUS_SPACE_UNRESTRICTED,
238 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
239 /*flags*/0, &bt->parent_dmat) != 0) {
240 bt_isa_release_resources(dev);
241 return (ENOMEM);
242 }
243
244 error = bt_init(dev);
245 if (error) {
246 bt_isa_release_resources(dev);
247 return (ENOMEM);
248 }
249
250 if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
251 /* DMA tag for our sense buffers */
252 if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/0,
253 /*boundary*/0,
254 /*lowaddr*/BUS_SPACE_MAXADDR,
255 /*highaddr*/BUS_SPACE_MAXADDR,
256 /*filter*/NULL, /*filterarg*/NULL,
257 bt->max_ccbs
258 * sizeof(struct scsi_sense_data),
259 /*nsegments*/1,
260 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
261 /*flags*/0, &bt->sense_dmat) != 0) {
262 bt_isa_release_resources(dev);
263 return (ENOMEM);
264 }
265
266 bt->init_level++;
267
268 /* Allocation of sense buffers */
269 if (bus_dmamem_alloc(bt->sense_dmat,
270 (void **)&bt->sense_buffers,
271 BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
272 bt_isa_release_resources(dev);
273 return (ENOMEM);
274 }
275
276 bt->init_level++;
277
278 /* And permanently map them */
279 bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
280 bt->sense_buffers,
281 bt->max_ccbs * sizeof(*bt->sense_buffers),
282 btmapsensebuffers, bt, /*flags*/0);
283
284 bt->init_level++;
285 }
286
287 error = bt_attach(dev);
288 if (error) {
289 bt_isa_release_resources(dev);
290 return (error);
291 }
292
293 return (0);
294}
295
296#define BIOS_MAP_SIZE (16 * 1024)
297
298static int
299btvlbouncefilter(void *arg, bus_addr_t addr)
300{
301 struct bt_softc *bt;
302
303 bt = (struct bt_softc *)arg;
304
305 addr &= BUS_SPACE_MAXADDR_24BIT;
306
307 if (addr == 0
308 || (addr >= bt->bios_addr
309 && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
310 return (1);
311 return (0);
312}
313
314static void
315btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
316{
317 struct bt_softc* bt;
318
319 bt = (struct bt_softc*)arg;
320 bt->sense_buffers_physbase = segs->ds_addr;
321}
322
323static device_method_t bt_isa_methods[] = {
324 /* Device interface */
325 DEVMETHOD(device_probe, bt_isa_probe),
326 DEVMETHOD(device_attach, bt_isa_attach),
327
328 { 0, 0 }
329};
330
331static driver_t bt_isa_driver = {
332 "bt",
333 bt_isa_methods,
334 sizeof(struct bt_softc),
335};
336
337static devclass_t bt_devclass;
338
339DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);