ata-cbus.c revision 130026 
1/*-
2 * Copyright (c) 2002 - 2004 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 * 3. 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 ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/sys/dev/ata/ata-cbus.c 130026 2004-06-03 06:10:02Z phk $");
31
32#include "opt_ata.h"
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/ata.h>
37#include <sys/bus.h>
38#include <sys/malloc.h>
39#include <sys/module.h>
40#include <sys/sema.h>
41#include <sys/taskqueue.h>
42#include <vm/uma.h>
43#include <machine/resource.h>
44#include <machine/bus.h>
45#include <sys/rman.h>
46#include <isa/isavar.h>
47#include <dev/ata/ata-all.h>
48
49/* local vars */
50struct ata_cbus_controller {
51    struct resource *io;
52    struct resource *altio;
53    struct resource *bankio;
54    struct resource *irq;
55    void *ih;
56    void (*setmode)(struct ata_device *, int);
57    void (*locking)(struct ata_channel *, int);
58    int current_bank;
59    struct {
60	void (*function)(void *);
61	void *argument;
62    } interrupt[2];
63};
64
65/* local prototypes */
66static void ata_cbus_intr(void *);
67static void ata_cbus_banking(struct ata_channel *, int);
68static void ata_cbus_setmode(struct ata_device *, int);
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    io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
84			    ATA_PC98_IOSIZE, RF_ACTIVE);
85    if (!io)
86	return ENOMEM;
87
88    /* calculate & set the altport range */
89    rid = ATA_PC98_ALTADDR_RID;
90    if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) {
91	bus_set_resource(dev, SYS_RES_IOPORT, rid,
92			 rman_get_start(io)+ATA_PC98_ALTOFFSET, ATA_ALTIOSIZE);
93    }
94
95    /* calculate & set the bank range */
96    rid = ATA_PC98_BANKADDR_RID;
97    if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) {
98	bus_set_resource(dev, SYS_RES_IOPORT, rid,
99			 ATA_PC98_BANK, ATA_PC98_BANKIOSIZE);
100    }
101
102    bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, io);
103    return 0;
104}
105
106static int
107ata_cbus_attach(device_t dev)
108{
109    struct ata_cbus_controller *ctlr = device_get_softc(dev);
110    int rid;
111
112    /* allocate resources */
113    rid = ATA_IOADDR_RID;
114    ctlr->io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
115				  ATA_PC98_IOSIZE, RF_ACTIVE);
116    if (!ctlr->io)
117       return ENOMEM;
118
119    rid = ATA_PC98_ALTADDR_RID;
120    ctlr->altio =
121	bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
122			   rman_get_start(ctlr->io) + ATA_PC98_ALTOFFSET, ~0,
123			   ATA_ALTIOSIZE, RF_ACTIVE);
124    if (!ctlr->altio) {
125	bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
126	return ENOMEM;
127    }
128
129    rid = ATA_PC98_BANKADDR_RID;
130    ctlr->bankio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
131				      ATA_PC98_BANK, ~0,
132				      ATA_PC98_BANKIOSIZE, RF_ACTIVE);
133    if (!ctlr->bankio) {
134	bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
135	bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio);
136	return ENOMEM;
137    }
138
139    rid = ATA_IRQ_RID;
140    if (!(ctlr->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
141					     RF_ACTIVE | RF_SHAREABLE))) {
142	device_printf(dev, "unable to alloc interrupt\n");
143	bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
144	bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio);
145	bus_release_resource(dev, SYS_RES_IOPORT,
146			     ATA_PC98_BANKADDR_RID, ctlr->bankio);
147	return ENXIO;
148    }
149
150    if ((bus_setup_intr(dev, ctlr->irq, ATA_INTR_FLAGS,
151			ata_cbus_intr, ctlr, &ctlr->ih))) {
152	device_printf(dev, "unable to setup interrupt\n");
153	bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
154	bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio);
155	bus_release_resource(dev, SYS_RES_IOPORT,
156			     ATA_PC98_BANKADDR_RID, ctlr->bankio);
157	bus_release_resource(dev, SYS_RES_IOPORT, ATA_IRQ_RID, ctlr->irq);
158	return ENXIO;
159    }
160
161    ctlr->locking = ata_cbus_banking;
162    ctlr->current_bank = -1;
163    ctlr->setmode = ata_cbus_setmode;;
164
165    if (!device_add_child(dev, "ata", 0))
166	return ENOMEM;
167    if (!device_add_child(dev, "ata", 1))
168	return ENOMEM;
169
170    return bus_generic_attach(dev);
171}
172
173static struct resource *
174ata_cbus_alloc_resource(device_t dev, device_t child, int type, int *rid,
175			u_long start, u_long end, u_long count, u_int flags)
176{
177    struct ata_cbus_controller *ctlr = device_get_softc(dev);
178
179    if (type == SYS_RES_IOPORT) {
180	switch (*rid) {
181	case ATA_IOADDR_RID:
182	    return ctlr->io;
183	case ATA_ALTADDR_RID:
184	    return ctlr->altio;
185	}
186    }
187    if (type == SYS_RES_IRQ)
188	return ctlr->irq;
189    return 0;
190}
191
192static int
193ata_cbus_setup_intr(device_t dev, device_t child, struct resource *irq,
194	       int flags, driver_intr_t *intr, void *arg,
195	       void **cookiep)
196{
197    struct ata_cbus_controller *controller = device_get_softc(dev);
198    int unit = ((struct ata_channel *)device_get_softc(child))->unit;
199
200    controller->interrupt[unit].function = intr;
201    controller->interrupt[unit].argument = arg;
202    *cookiep = controller;
203
204    return 0;
205}
206
207static int
208ata_cbus_print_child(device_t dev, device_t child)
209{
210    struct ata_channel *ch = device_get_softc(child);
211    int retval = 0;
212
213    retval += bus_print_child_header(dev, child);
214    retval += printf(" at bank %d", ch->unit);
215    retval += bus_print_child_footer(dev, child);
216    return retval;
217}
218
219static void
220ata_cbus_intr(void *data)
221{
222    struct ata_cbus_controller *ctlr = data;
223
224    if (ctlr->current_bank != -1 &&
225	ctlr->interrupt[ctlr->current_bank].argument)
226	ctlr->interrupt[ctlr->current_bank].
227	    function(ctlr->interrupt[ctlr->current_bank].argument);
228}
229
230static void
231ata_cbus_banking(struct ata_channel *ch, int flags)
232{
233    struct ata_cbus_controller *ctlr =
234	device_get_softc(device_get_parent(ch->dev));
235
236    switch (flags) {
237    case ATA_LF_LOCK:
238	if (ctlr->current_bank == ch->unit)
239	    break;
240	while (!atomic_cmpset_acq_int(&ctlr->current_bank, -1, ch->unit))
241	    tsleep((caddr_t)ch->locking, PRIBIO, "atabnk", 1);
242	ATA_OUTB(ctlr->bankio, 0, ch->unit);
243	break;
244
245    case ATA_LF_UNLOCK:
246	if (ctlr->current_bank == -1 || ctlr->current_bank != ch->unit)
247	    break;
248	atomic_store_rel_int(&ctlr->current_bank, -1);
249	break;
250    }
251    return;
252}
253
254static void
255ata_cbus_setmode(struct ata_device *atadev, int mode)
256{
257    atadev->mode = ata_limit_mode(atadev, mode, ATA_PIO_MAX);
258}
259
260static device_method_t ata_cbus_methods[] = {
261    /* device_interface */
262    DEVMETHOD(device_probe,	ata_cbus_probe),
263    DEVMETHOD(device_attach,	ata_cbus_attach),
264
265    /* bus methods */
266    DEVMETHOD(bus_alloc_resource,	ata_cbus_alloc_resource),
267    DEVMETHOD(bus_setup_intr,		ata_cbus_setup_intr),
268    DEVMETHOD(bus_print_child,		ata_cbus_print_child),
269    { 0, 0 }
270};
271
272static driver_t ata_cbus_driver = {
273    "atacbus",
274    ata_cbus_methods,
275    sizeof(struct ata_cbus_controller),
276};
277
278static devclass_t ata_cbus_devclass;
279
280DRIVER_MODULE(atacbus, isa, ata_cbus_driver, ata_cbus_devclass, 0, 0);
281
282static int
283ata_cbussub_probe(device_t dev)
284{
285    struct ata_cbus_controller *ctlr = device_get_softc(device_get_parent(dev));
286    struct ata_channel *ch = device_get_softc(dev);
287    device_t *children;
288    int count, i;
289
290    /* find channel number on this controller */
291    device_get_children(device_get_parent(dev), &children, &count);
292    for (i = 0; i < count; i++) {
293	if (children[i] == dev)
294	    ch->unit = i;
295    }
296    free(children, M_TEMP);
297
298    /* setup the resource vectors */
299    for (i = ATA_DATA; i <= ATA_STATUS; i ++) {
300	ch->r_io[i].res = ctlr->io;
301	ch->r_io[i].offset = i << 1;
302    }
303    ch->r_io[ATA_ALTSTAT].res = ctlr->altio;
304    ch->r_io[ATA_ALTSTAT].offset = 0;
305
306    /* initialize softc for this channel */
307    ch->flags |= ATA_USE_16BIT | ATA_USE_PC98GEOM;
308    ch->locking = ctlr->locking;
309    ch->device[MASTER].setmode = ctlr->setmode;
310    ch->device[SLAVE].setmode = ctlr->setmode;
311    ata_generic_hw(ch);
312    return ata_probe(dev);
313}
314
315static device_method_t ata_cbussub_methods[] = {
316    /* device interface */
317    DEVMETHOD(device_probe,	ata_cbussub_probe),
318    DEVMETHOD(device_attach,	ata_attach),
319    DEVMETHOD(device_detach,	ata_detach),
320    DEVMETHOD(device_resume,	ata_resume),
321    { 0, 0 }
322};
323
324static driver_t ata_cbussub_driver = {
325    "ata",
326    ata_cbussub_methods,
327    sizeof(struct ata_channel),
328};
329
330DRIVER_MODULE(ata, atacbus, ata_cbussub_driver, ata_devclass, 0, 0);
331