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1 /*-
2  * Copyright (c) 2003-2008 M. Warner Losh.  All Rights Reserved.
3  * Copyright (c) 2000,2001 Jonathan Chen.  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  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/malloc.h>
33 #include <sys/module.h>
34 #include <sys/kernel.h>
35 #include <sys/sysctl.h>
36
37 #include <sys/bus.h>
38 #include <machine/bus.h>
39 #include <sys/rman.h>
40 #include <machine/resource.h>
41
42 #include <sys/pciio.h>
43 #include <dev/pci/pcivar.h>
44 #include <dev/pci/pcireg.h>
45 #include <dev/pci/pci_private.h>
46
47 #include <dev/cardbus/cardbusreg.h>
48 #include <dev/cardbus/cardbusvar.h>
49 #include <dev/cardbus/cardbus_cis.h>
50 #include <dev/pccard/pccard_cis.h>
51 #include <dev/pccard/pccardvar.h>
52
53 #include "power_if.h"
54 #include "pcib_if.h"
55
56 /* sysctl vars */
57 static SYSCTL_NODE(_hw, OID_AUTO, cardbus, CTLFLAG_RD, 0, "CardBus parameters");
58
59 int    cardbus_debug = 0;
60 TUNABLE_INT("hw.cardbus.debug", &cardbus_debug);
61 SYSCTL_INT(_hw_cardbus, OID_AUTO, debug, CTLFLAG_RW,
62     &cardbus_debug, 0,
63   "CardBus debug");
64
65 int    cardbus_cis_debug = 0;
66 TUNABLE_INT("hw.cardbus.cis_debug", &cardbus_cis_debug);
67 SYSCTL_INT(_hw_cardbus, OID_AUTO, cis_debug, CTLFLAG_RW,
68     &cardbus_cis_debug, 0,
69   "CardBus CIS debug");
70
71 #define DPRINTF(a) if (cardbus_debug) printf a
72 #define DEVPRINTF(x) if (cardbus_debug) device_printf x
73
74 static int      cardbus_attach(device_t cbdev);
75 static int      cardbus_attach_card(device_t cbdev);
76 static int      cardbus_detach(device_t cbdev);
77 static int      cardbus_detach_card(device_t cbdev);
78 static void     cardbus_device_setup_regs(pcicfgregs *cfg);
79 static void     cardbus_driver_added(device_t cbdev, driver_t *driver);
80 static int      cardbus_probe(device_t cbdev);
81 static int      cardbus_read_ivar(device_t cbdev, device_t child, int which,
82                     uintptr_t *result);
83
84 /************************************************************************/
85 /* Probe/Attach                                                         */
86 /************************************************************************/
87
88 static int
89 cardbus_probe(device_t cbdev)
90 {
91         device_set_desc(cbdev, "CardBus bus");
92         return (0);
93 }
94
95 static int
96 cardbus_attach(device_t cbdev)
97 {
98         struct cardbus_softc *sc;
99
100         sc = device_get_softc(cbdev);
101         sc->sc_dev = cbdev;
102         return (0);
103 }
104
105 static int
106 cardbus_detach(device_t cbdev)
107 {
108
109         cardbus_detach_card(cbdev);
110         return (0);
111 }
112
113 static int
114 cardbus_suspend(device_t self)
115 {
116
117         cardbus_detach_card(self);
118         return (0);
119 }
120
121 static int
122 cardbus_resume(device_t self)
123 {
124
125         return (0);
126 }
127
128 /************************************************************************/
129 /* Attach/Detach card                                                   */
130 /************************************************************************/
131
132 static void
133 cardbus_device_setup_regs(pcicfgregs *cfg)
134 {
135         device_t dev = cfg->dev;
136         int i;
137
138         /*
139          * Some cards power up with garbage in their BARs.  This
140          * code clears all that junk out.
141          */
142         for (i = 0; i < PCIR_MAX_BAR_0; i++)
143                 pci_write_config(dev, PCIR_BAR(i), 0, 4);
144
145         cfg->intline =
146             pci_get_irq(device_get_parent(device_get_parent(dev)));
147         pci_write_config(dev, PCIR_INTLINE, cfg->intline, 1);
148         pci_write_config(dev, PCIR_CACHELNSZ, 0x08, 1);
149         pci_write_config(dev, PCIR_LATTIMER, 0xa8, 1);
150         pci_write_config(dev, PCIR_MINGNT, 0x14, 1);
151         pci_write_config(dev, PCIR_MAXLAT, 0x14, 1);
152 }
153
154 static int
155 cardbus_attach_card(device_t cbdev)
156 {
157         device_t brdev = device_get_parent(cbdev);
158         device_t child;
159         int bus, domain, slot, func;
160         int cardattached = 0;
161         int cardbusfunchigh = 0;
162         struct cardbus_softc *sc;
163
164         sc = device_get_softc(cbdev);
165         cardbus_detach_card(cbdev); /* detach existing cards */
166         POWER_ENABLE_SOCKET(brdev, cbdev);
167         domain = pcib_get_domain(cbdev);
168         bus = pcib_get_bus(cbdev);
169         slot = 0;
170         /* For each function, set it up and try to attach a driver to it */
171         for (func = 0; func <= cardbusfunchigh; func++) {
172                 struct cardbus_devinfo *dinfo;
173
174                 dinfo = (struct cardbus_devinfo *)
175                     pci_read_device(brdev, domain, bus, slot, func,
176                         sizeof(struct cardbus_devinfo));
177                 if (dinfo == NULL)
178                         continue;
179                 if (dinfo->pci.cfg.mfdev)
180                         cardbusfunchigh = PCI_FUNCMAX;
181
182                 child = device_add_child(cbdev, NULL, -1);
183                 if (child == NULL) {
184                         DEVPRINTF((cbdev, "Cannot add child!\n"));
185                         pci_freecfg((struct pci_devinfo *)dinfo);
186                         continue;
187                 }
188                 dinfo->pci.cfg.dev = child;
189                 resource_list_init(&dinfo->pci.resources);
190                 device_set_ivars(child, dinfo);
191                 cardbus_device_create(sc, dinfo, cbdev, child);
192                 if (cardbus_do_cis(cbdev, child) != 0)
193                         DEVPRINTF((cbdev, "Warning: Bogus CIS ignored\n"));
194                 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 0);
195                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
196                 cardbus_device_setup_regs(&dinfo->pci.cfg);
197                 pci_add_resources(cbdev, child, 1, dinfo->mprefetchable);
198                 pci_print_verbose(&dinfo->pci);
199                 if (device_probe_and_attach(child) == 0)
200                         cardattached++;
201                 else
202                         pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 1);
203         }
204         if (cardattached > 0)
205                 return (0);
206 /*      POWER_DISABLE_SOCKET(brdev, cbdev); */
207         return (ENOENT);
208 }
209
210 static int
211 cardbus_detach_card(device_t cbdev)
212 {
213         int numdevs;
214         device_t *devlist;
215         int tmp;
216         int err = 0;
217
218         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
219                 return (ENOENT);
220         if (numdevs == 0) {
221                 free(devlist, M_TEMP);
222                 return (ENOENT);
223         }
224
225         for (tmp = 0; tmp < numdevs; tmp++) {
226                 struct cardbus_devinfo *dinfo = device_get_ivars(devlist[tmp]);
227
228                 if (dinfo->pci.cfg.dev != devlist[tmp])
229                         device_printf(cbdev, "devinfo dev mismatch\n");
230                 cardbus_device_destroy(dinfo);
231                 pci_delete_child(cbdev, devlist[tmp]);
232         }
233         POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
234         free(devlist, M_TEMP);
235         return (err);
236 }
237
238 static void
239 cardbus_driver_added(device_t cbdev, driver_t *driver)
240 {
241         int numdevs;
242         device_t *devlist;
243         device_t dev;
244         int i;
245         struct cardbus_devinfo *dinfo;
246
247         DEVICE_IDENTIFY(driver, cbdev);
248         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
249                 return;
250
251         /*
252          * If there are no drivers attached, but there are children,
253          * then power the card up.
254          */
255         for (i = 0; i < numdevs; i++) {
256                 dev = devlist[i];
257                 if (device_get_state(dev) != DS_NOTPRESENT)
258                     break;
259         }
260         if (i > 0 && i == numdevs)
261                 POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
262         for (i = 0; i < numdevs; i++) {
263                 dev = devlist[i];
264                 if (device_get_state(dev) != DS_NOTPRESENT)
265                         continue;
266                 dinfo = device_get_ivars(dev);
267                 pci_print_verbose(&dinfo->pci);
268                 if (bootverbose)
269                         printf("pci%d:%d:%d:%d: reprobing on driver added\n",
270                             dinfo->pci.cfg.domain, dinfo->pci.cfg.bus,
271                             dinfo->pci.cfg.slot, dinfo->pci.cfg.func);
272                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
273                 if (device_probe_and_attach(dev) != 0)
274                         pci_cfg_save(dev, &dinfo->pci, 1);
275         }
276         free(devlist, M_TEMP);
277 }
278
279 /************************************************************************/
280 /* Other Bus Methods                                                    */
281 /************************************************************************/
282
283 static int
284 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
285 {
286         struct cardbus_devinfo *dinfo;
287         pcicfgregs *cfg;
288
289         dinfo = device_get_ivars(child);
290         cfg = &dinfo->pci.cfg;
291
292         switch (which) {
293         case PCI_IVAR_ETHADDR:
294                 /*
295                  * The generic accessor doesn't deal with failure, so
296                  * we set the return value, then return an error.
297                  */
298                 if (dinfo->fepresent & (1 << PCCARD_TPLFE_TYPE_LAN_NID)) {
299                         *((uint8_t **) result) = dinfo->funce.lan.nid;
300                         break;
301                 }
302                 *((uint8_t **) result) = NULL;
303                 return (EINVAL);
304         default:
305                 return (pci_read_ivar(cbdev, child, which, result));
306         }
307         return 0;
308 }
309
310 static device_method_t cardbus_methods[] = {
311         /* Device interface */
312         DEVMETHOD(device_probe,         cardbus_probe),
313         DEVMETHOD(device_attach,        cardbus_attach),
314         DEVMETHOD(device_detach,        cardbus_detach),
315         DEVMETHOD(device_suspend,       cardbus_suspend),
316         DEVMETHOD(device_resume,        cardbus_resume),
317
318         /* Bus interface */
319         DEVMETHOD(bus_get_dma_tag,      bus_generic_get_dma_tag),
320         DEVMETHOD(bus_read_ivar,        cardbus_read_ivar),
321         DEVMETHOD(bus_driver_added,     cardbus_driver_added),
322
323         /* Card Interface */
324         DEVMETHOD(card_attach_card,     cardbus_attach_card),
325         DEVMETHOD(card_detach_card,     cardbus_detach_card),
326
327         {0,0}
328 };
329
330 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods,
331     sizeof(struct cardbus_softc), pci_driver);
332
333 static devclass_t cardbus_devclass;
334
335 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
336 MODULE_VERSION(cardbus, 1);