ata-cbus.c revision 166901 
1/*-
2 * Copyright (c) 2002 - 2007 S�ren Schmidt <sos@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer,
10 *    without modification, immediately at the beginning of the file.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/dev/ata/ata-cbus.c 166901 2007-02-23 12:19:07Z piso $");
29
30#include "opt_ata.h"
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/kernel.h>
34#include <sys/ata.h>
35#include <sys/bus.h>
36#include <sys/malloc.h>
37#include <sys/module.h>
38#include <sys/conf.h>
39#include <sys/sema.h>
40#include <sys/taskqueue.h>
41#include <vm/uma.h>
42#include <machine/resource.h>
43#include <machine/bus.h>
44#include <sys/rman.h>
45#include <isa/isavar.h>
46#include <dev/ata/ata-all.h>
47#include <ata_if.h>
48
49/* local vars */
50struct ata_cbus_controller {
51    struct resource *io;
52    struct resource *ctlio;
53    struct resource *bankio;
54    struct resource *irq;
55    void *ih;
56    struct mtx bank_mtx;
57    int locked_bank;
58    int restart_bank;
59    int hardware_bank;
60    struct {
61	void (*function)(void *);
62	void *argument;
63    } interrupt[2];
64};
65
66/* local prototypes */
67static void ata_cbus_intr(void *);
68static int ata_cbuschannel_banking(device_t dev, int flags);
69
70static int
71ata_cbus_probe(device_t dev)
72{
73    struct resource *io;
74    int rid;
75    u_long tmp;
76
77    /* dont probe PnP devices */
78    if (isa_get_vendorid(dev))
79	return (ENXIO);
80
81    /* allocate the ioport range */
82    rid = ATA_IOADDR_RID;
83    if (!(io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
84				  ATA_PC98_IOSIZE, RF_ACTIVE)))
85	return ENOMEM;
86
87    /* calculate & set the altport range */
88    rid = ATA_PC98_CTLADDR_RID;
89    if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) {
90	bus_set_resource(dev, SYS_RES_IOPORT, rid,
91			 rman_get_start(io)+ATA_PC98_CTLOFFSET, ATA_CTLIOSIZE);
92    }
93
94    /* calculate & set the bank range */
95    rid = ATA_PC98_BANKADDR_RID;
96    if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) {
97	bus_set_resource(dev, SYS_RES_IOPORT, rid,
98			 ATA_PC98_BANK, ATA_PC98_BANKIOSIZE);
99    }
100
101    bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, io);
102    return 0;
103}
104
105static int
106ata_cbus_attach(device_t dev)
107{
108    struct ata_cbus_controller *ctlr = device_get_softc(dev);
109    int rid;
110
111    /* allocate resources */
112    rid = ATA_IOADDR_RID;
113    if (!(ctlr->io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
114					ATA_PC98_IOSIZE, RF_ACTIVE)))
115       return ENOMEM;
116
117    rid = ATA_PC98_CTLADDR_RID;
118    if (!(ctlr->ctlio =
119	  bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
120			     rman_get_start(ctlr->io) + ATA_PC98_CTLOFFSET, ~0,
121			     ATA_CTLIOSIZE, RF_ACTIVE))) {
122	bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
123	return ENOMEM;
124    }
125
126    rid = ATA_PC98_BANKADDR_RID;
127    if (!(ctlr->bankio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
128					    ATA_PC98_BANK, ~0,
129					    ATA_PC98_BANKIOSIZE, RF_ACTIVE))) {
130	bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
131	bus_release_resource(dev, SYS_RES_IOPORT, ATA_CTLADDR_RID, ctlr->ctlio);
132	return ENOMEM;
133    }
134
135    rid = ATA_IRQ_RID;
136    if (!(ctlr->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
137					     RF_ACTIVE | RF_SHAREABLE))) {
138	device_printf(dev, "unable to alloc interrupt\n");
139	bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
140	bus_release_resource(dev, SYS_RES_IOPORT, ATA_CTLADDR_RID, ctlr->ctlio);
141	bus_release_resource(dev, SYS_RES_IOPORT,
142			     ATA_PC98_BANKADDR_RID, ctlr->bankio);
143	return ENXIO;
144    }
145
146    if ((bus_setup_intr(dev, ctlr->irq, ATA_INTR_FLAGS,
147			NULL, ata_cbus_intr, ctlr, &ctlr->ih))) {
148	device_printf(dev, "unable to setup interrupt\n");
149	bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
150	bus_release_resource(dev, SYS_RES_IOPORT, ATA_CTLADDR_RID, ctlr->ctlio);
151	bus_release_resource(dev, SYS_RES_IOPORT,
152			     ATA_PC98_BANKADDR_RID, ctlr->bankio);
153	bus_release_resource(dev, SYS_RES_IOPORT, ATA_IRQ_RID, ctlr->irq);
154	return ENXIO;
155    }
156
157    mtx_init(&ctlr->bank_mtx, "ATA cbus bank lock", NULL, MTX_DEF);
158    ctlr->hardware_bank = -1;
159    ctlr->locked_bank = -1;
160    ctlr->restart_bank = -1;
161
162    if (!device_add_child(dev, "ata", 0))
163	return ENOMEM;
164    if (!device_add_child(dev, "ata", 1))
165	return ENOMEM;
166
167    return bus_generic_attach(dev);
168}
169
170static struct resource *
171ata_cbus_alloc_resource(device_t dev, device_t child, int type, int *rid,
172			u_long start, u_long end, u_long count, u_int flags)
173{
174    struct ata_cbus_controller *ctlr = device_get_softc(dev);
175
176    if (type == SYS_RES_IOPORT) {
177	switch (*rid) {
178	case ATA_IOADDR_RID:
179	    return ctlr->io;
180	case ATA_CTLADDR_RID:
181	    return ctlr->ctlio;
182	}
183    }
184    if (type == SYS_RES_IRQ)
185	return ctlr->irq;
186    return 0;
187}
188
189static int
190ata_cbus_setup_intr(device_t dev, device_t child, struct resource *irq,
191	       int flags, driver_filter_t *filter, driver_intr_t *intr,
192	       void *arg, void **cookiep)
193{
194    struct ata_cbus_controller *controller = device_get_softc(dev);
195    int unit = ((struct ata_channel *)device_get_softc(child))->unit;
196
197    if (filter != NULL) {
198	    printf("ata-cbus.c: we cannot use a filter here\n");
199	    return (EINVAL);
200    }
201    controller->interrupt[unit].function = intr;
202    controller->interrupt[unit].argument = arg;
203    *cookiep = controller;
204
205    return 0;
206}
207
208static int
209ata_cbus_print_child(device_t dev, device_t child)
210{
211    struct ata_channel *ch = device_get_softc(child);
212    int retval = 0;
213
214    retval += bus_print_child_header(dev, child);
215    retval += printf(" at bank %d", ch->unit);
216    retval += bus_print_child_footer(dev, child);
217    return retval;
218}
219
220static void
221ata_cbus_intr(void *data)
222{
223    struct ata_cbus_controller *ctlr = data;
224    struct ata_channel *ch;
225    int unit;
226
227    for (unit = 0; unit < 2; unit++) {
228	if (!(ch = ctlr->interrupt[unit].argument))
229	    continue;
230	if (ata_cbuschannel_banking(ch->dev, ATA_LF_WHICH) == unit)
231	    ctlr->interrupt[unit].function(ch);
232    }
233}
234
235static device_method_t ata_cbus_methods[] = {
236    /* device interface */
237    DEVMETHOD(device_probe,             ata_cbus_probe),
238    DEVMETHOD(device_attach,            ata_cbus_attach),
239//  DEVMETHOD(device_detach,            ata_cbus_detach),
240
241    /* bus methods */
242    DEVMETHOD(bus_alloc_resource,       ata_cbus_alloc_resource),
243    DEVMETHOD(bus_setup_intr,           ata_cbus_setup_intr),
244    DEVMETHOD(bus_print_child,          ata_cbus_print_child),
245
246    { 0, 0 }
247};
248
249static driver_t ata_cbus_driver = {
250    "atacbus",
251    ata_cbus_methods,
252    sizeof(struct ata_cbus_controller),
253};
254
255static devclass_t ata_cbus_devclass;
256
257DRIVER_MODULE(atacbus, isa, ata_cbus_driver, ata_cbus_devclass, 0, 0);
258
259static int
260ata_cbuschannel_probe(device_t dev)
261{
262    struct ata_cbus_controller *ctlr = device_get_softc(device_get_parent(dev));
263    struct ata_channel *ch = device_get_softc(dev);
264    device_t *children;
265    int count, i;
266
267    /* find channel number on this controller */
268    device_get_children(device_get_parent(dev), &children, &count);
269    for (i = 0; i < count; i++) {
270	if (children[i] == dev)
271	    ch->unit = i;
272    }
273    free(children, M_TEMP);
274
275    /* setup the resource vectors */
276    for (i = ATA_DATA; i <= ATA_COMMAND; i ++) {
277	ch->r_io[i].res = ctlr->io;
278	ch->r_io[i].offset = i << 1;
279    }
280    ch->r_io[ATA_CONTROL].res = ctlr->ctlio;
281    ch->r_io[ATA_CONTROL].offset = 0;
282    ch->r_io[ATA_IDX_ADDR].res = ctlr->io;
283    ata_default_registers(dev);
284
285    /* initialize softc for this channel */
286    ch->flags |= ATA_USE_16BIT;
287    ata_generic_hw(dev);
288    return ata_probe(dev);
289}
290
291static int
292ata_cbuschannel_banking(device_t dev, int flags)
293{
294    struct ata_cbus_controller *ctlr = device_get_softc(device_get_parent(dev));
295    struct ata_channel *ch = device_get_softc(dev);
296    int res;
297
298    mtx_lock(&ctlr->bank_mtx);
299    switch (flags) {
300    case ATA_LF_LOCK:
301	if (ctlr->locked_bank == -1)
302	    ctlr->locked_bank = ch->unit;
303	if (ctlr->locked_bank == ch->unit) {
304	    ctlr->hardware_bank = ch->unit;
305	    ATA_OUTB(ctlr->bankio, 0, ch->unit);
306	}
307	else
308	    ctlr->restart_bank = ch->unit;
309	break;
310
311    case ATA_LF_UNLOCK:
312	if (ctlr->locked_bank == ch->unit) {
313	    ctlr->locked_bank = -1;
314	    if (ctlr->restart_bank != -1) {
315		if ((ch = ctlr->interrupt[ctlr->restart_bank].argument)) {
316		    ctlr->restart_bank = -1;
317		    mtx_unlock(&ctlr->bank_mtx);
318		    ata_start(ch->dev);
319		    return -1;
320		}
321	    }
322	}
323	break;
324
325    case ATA_LF_WHICH:
326	break;
327    }
328    res = ctlr->locked_bank;
329    mtx_unlock(&ctlr->bank_mtx);
330    return res;
331}
332
333static device_method_t ata_cbuschannel_methods[] = {
334    /* device interface */
335    DEVMETHOD(device_probe,     ata_cbuschannel_probe),
336    DEVMETHOD(device_attach,    ata_attach),
337    DEVMETHOD(device_detach,    ata_detach),
338    DEVMETHOD(device_suspend,   ata_suspend),
339    DEVMETHOD(device_resume,    ata_resume),
340
341    /* ATA methods */
342    DEVMETHOD(ata_locking,      ata_cbuschannel_banking),
343    { 0, 0 }
344};
345
346static driver_t ata_cbuschannel_driver = {
347    "ata",
348    ata_cbuschannel_methods,
349    sizeof(struct ata_channel),
350};
351
352DRIVER_MODULE(ata, atacbus, ata_cbuschannel_driver, ata_devclass, 0, 0);
353MODULE_DEPEND(ata, ata, 1, 1, 1);
354