1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2000,2001 Jonathan Chen. All rights reserved.
5 * Copyright (c) 2003-2008 M. Warner Losh <imp@FreeBSD.org>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/param.h>
33 #include <sys/eventhandler.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/module.h>
37 #include <sys/kernel.h>
38 #include <sys/sysctl.h>
39
40 #include <sys/bus.h>
41 #include <machine/bus.h>
42 #include <sys/rman.h>
43 #include <machine/resource.h>
44
45 #include <sys/pciio.h>
46 #include <dev/pci/pcivar.h>
47 #include <dev/pci/pcireg.h>
48 #include <dev/pci/pci_private.h>
49
50 #include <dev/cardbus/cardbusreg.h>
51 #include <dev/cardbus/cardbusvar.h>
52 #include <dev/cardbus/cardbus_cis.h>
53 #include <dev/pccard/pccard_cis.h>
54 #include <dev/pccard/pccardvar.h>
55
56 #include "power_if.h"
57 #include "pcib_if.h"
58
59 /* sysctl vars */
60 static SYSCTL_NODE(_hw, OID_AUTO, cardbus, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
61 "CardBus parameters");
62
63 int cardbus_debug = 0;
64 SYSCTL_INT(_hw_cardbus, OID_AUTO, debug, CTLFLAG_RWTUN,
65 &cardbus_debug, 0, "CardBus debug");
66
67 int cardbus_cis_debug = 0;
68 SYSCTL_INT(_hw_cardbus, OID_AUTO, cis_debug, CTLFLAG_RWTUN,
69 &cardbus_cis_debug, 0, "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 #ifdef PCI_RES_BUS
100 int rid;
101 #endif
102
103 sc = device_get_softc(cbdev);
104 sc->sc_dev = cbdev;
105 #ifdef PCI_RES_BUS
106 rid = 0;
107 sc->sc_bus = bus_alloc_resource(cbdev, PCI_RES_BUS, &rid,
108 pcib_get_bus(cbdev), pcib_get_bus(cbdev), 1, 0);
109 if (sc->sc_bus == NULL) {
110 device_printf(cbdev, "failed to allocate bus number\n");
111 return (ENXIO);
112 }
113 #else
114 device_printf(cbdev, "Your bus numbers may be AFU\n");
115 #endif
116 return (0);
117 }
118
119 static int
120 cardbus_detach(device_t cbdev)
121 {
122 #ifdef PCI_RES_BUS
123 struct cardbus_softc *sc;
124 #endif
125
126 cardbus_detach_card(cbdev);
127 #ifdef PCI_RES_BUS
128 sc = device_get_softc(cbdev);
129 device_printf(cbdev, "Freeing up the allocatd bus\n");
130 (void)bus_release_resource(cbdev, PCI_RES_BUS, 0, sc->sc_bus);
131 #endif
132 return (0);
133 }
134
135 static int
136 cardbus_suspend(device_t self)
137 {
138
139 cardbus_detach_card(self);
140 return (0);
141 }
142
143 static int
144 cardbus_resume(device_t self)
145 {
146
147 return (0);
148 }
149
150 /************************************************************************/
151 /* Attach/Detach card */
152 /************************************************************************/
153
154 static void
155 cardbus_device_setup_regs(pcicfgregs *cfg)
156 {
157 device_t dev = cfg->dev;
158 int i;
159
160 /*
161 * Some cards power up with garbage in their BARs. This
162 * code clears all that junk out.
163 */
164 for (i = 0; i < PCIR_MAX_BAR_0; i++)
165 pci_write_config(dev, PCIR_BAR(i), 0, 4);
166
167 cfg->intline =
168 pci_get_irq(device_get_parent(device_get_parent(dev)));
169 pci_write_config(dev, PCIR_INTLINE, cfg->intline, 1);
170 pci_write_config(dev, PCIR_CACHELNSZ, 0x08, 1);
171 pci_write_config(dev, PCIR_LATTIMER, 0xa8, 1);
172 pci_write_config(dev, PCIR_MINGNT, 0x14, 1);
173 pci_write_config(dev, PCIR_MAXLAT, 0x14, 1);
174 }
175
176 static struct pci_devinfo *
177 cardbus_alloc_devinfo(device_t dev)
178 {
179 struct cardbus_devinfo *dinfo;
180
181 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
182 return (&dinfo->pci);
183 }
184
185 static int
186 cardbus_attach_card(device_t cbdev)
187 {
188 device_t brdev = device_get_parent(cbdev);
189 device_t child;
190 int bus, domain, slot, func;
191 int cardattached = 0;
192 int cardbusfunchigh = 0;
193 struct cardbus_softc *sc;
194
195 sc = device_get_softc(cbdev);
196 cardbus_detach_card(cbdev); /* detach existing cards */
197 POWER_DISABLE_SOCKET(brdev, cbdev); /* Turn the socket off first */
198 POWER_ENABLE_SOCKET(brdev, cbdev);
199 domain = pcib_get_domain(cbdev);
200 bus = pcib_get_bus(cbdev);
201 slot = 0;
202 mtx_lock(&Giant);
203 /* For each function, set it up and try to attach a driver to it */
204 for (func = 0; func <= cardbusfunchigh; func++) {
205 struct cardbus_devinfo *dinfo;
206
207 dinfo = (struct cardbus_devinfo *)
208 pci_read_device(brdev, cbdev, domain, bus, slot, func);
209 if (dinfo == NULL)
210 continue;
211 if (dinfo->pci.cfg.mfdev)
212 cardbusfunchigh = PCI_FUNCMAX;
213
214 child = device_add_child(cbdev, NULL, -1);
215 if (child == NULL) {
216 DEVPRINTF((cbdev, "Cannot add child!\n"));
217 pci_freecfg((struct pci_devinfo *)dinfo);
218 continue;
219 }
220 dinfo->pci.cfg.dev = child;
221 resource_list_init(&dinfo->pci.resources);
222 device_set_ivars(child, dinfo);
223 cardbus_device_create(sc, dinfo, cbdev, child);
224 if (cardbus_do_cis(cbdev, child) != 0)
225 DEVPRINTF((cbdev, "Warning: Bogus CIS ignored\n"));
226 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 0);
227 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
228 cardbus_device_setup_regs(&dinfo->pci.cfg);
229 pci_add_resources(cbdev, child, 1, dinfo->mprefetchable);
230 pci_print_verbose(&dinfo->pci);
231 if (device_probe_and_attach(child) == 0)
232 cardattached++;
233 else
234 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 1);
235 }
236 mtx_unlock(&Giant);
237 if (cardattached > 0)
238 return (0);
239 /* POWER_DISABLE_SOCKET(brdev, cbdev); */
240 return (ENOENT);
241 }
242
243 static void
244 cardbus_child_deleted(device_t cbdev, device_t child)
245 {
246 struct cardbus_devinfo *dinfo = device_get_ivars(child);
247
248 if (dinfo->pci.cfg.dev != child)
249 device_printf(cbdev, "devinfo dev mismatch\n");
250 cardbus_device_destroy(dinfo);
251 pci_child_deleted(cbdev, child);
252 }
253
254 static int
255 cardbus_detach_card(device_t cbdev)
256 {
257 int err = 0;
258
259 mtx_lock(&Giant);
260 err = bus_generic_detach(cbdev);
261 if (err == 0)
262 err = device_delete_children(cbdev);
263 mtx_unlock(&Giant);
264 if (err)
265 return (err);
266
267 POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
268 return (err);
269 }
270
271 static void
272 cardbus_driver_added(device_t cbdev, driver_t *driver)
273 {
274 int numdevs;
275 device_t *devlist;
276 device_t dev;
277 int i;
278 struct cardbus_devinfo *dinfo;
279
280 DEVICE_IDENTIFY(driver, cbdev);
281 if (device_get_children(cbdev, &devlist, &numdevs) != 0)
282 return;
283
284 /*
285 * If there are no drivers attached, but there are children,
286 * then power the card up.
287 */
288 for (i = 0; i < numdevs; i++) {
289 dev = devlist[i];
290 if (device_get_state(dev) != DS_NOTPRESENT)
291 break;
292 }
293 if (i > 0 && i == numdevs)
294 POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
295 for (i = 0; i < numdevs; i++) {
296 dev = devlist[i];
297 if (device_get_state(dev) != DS_NOTPRESENT)
298 continue;
299 dinfo = device_get_ivars(dev);
300 pci_print_verbose(&dinfo->pci);
301 if (bootverbose)
302 printf("pci%d:%d:%d:%d: reprobing on driver added\n",
303 dinfo->pci.cfg.domain, dinfo->pci.cfg.bus,
304 dinfo->pci.cfg.slot, dinfo->pci.cfg.func);
305 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
306 if (device_probe_and_attach(dev) != 0)
307 pci_cfg_save(dev, &dinfo->pci, 1);
308 }
309 free(devlist, M_TEMP);
310 }
311
312 /************************************************************************/
313 /* Other Bus Methods */
314 /************************************************************************/
315
316 static int
317 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
318 {
319 struct cardbus_devinfo *dinfo;
320 pcicfgregs *cfg;
321
322 dinfo = device_get_ivars(child);
323 cfg = &dinfo->pci.cfg;
324
325 switch (which) {
326 case PCI_IVAR_ETHADDR:
327 /*
328 * The generic accessor doesn't deal with failure, so
329 * we set the return value, then return an error.
330 */
331 if (dinfo->fepresent & (1 << PCCARD_TPLFE_TYPE_LAN_NID)) {
332 *((uint8_t **) result) = dinfo->funce.lan.nid;
333 break;
334 }
335 *((uint8_t **) result) = NULL;
336 return (EINVAL);
337 default:
338 return (pci_read_ivar(cbdev, child, which, result));
339 }
340 return 0;
341 }
342
343 static device_method_t cardbus_methods[] = {
344 /* Device interface */
345 DEVMETHOD(device_probe, cardbus_probe),
346 DEVMETHOD(device_attach, cardbus_attach),
347 DEVMETHOD(device_detach, cardbus_detach),
348 DEVMETHOD(device_suspend, cardbus_suspend),
349 DEVMETHOD(device_resume, cardbus_resume),
350
351 /* Bus interface */
352 DEVMETHOD(bus_child_deleted, cardbus_child_deleted),
353 DEVMETHOD(bus_get_dma_tag, bus_generic_get_dma_tag),
354 DEVMETHOD(bus_read_ivar, cardbus_read_ivar),
355 DEVMETHOD(bus_driver_added, cardbus_driver_added),
356 DEVMETHOD(bus_rescan, bus_null_rescan),
357
358 /* Card Interface */
359 DEVMETHOD(card_attach_card, cardbus_attach_card),
360 DEVMETHOD(card_detach_card, cardbus_detach_card),
361
362 /* PCI interface */
363 DEVMETHOD(pci_alloc_devinfo, cardbus_alloc_devinfo),
364 {0,0}
365 };
366
367 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods,
368 sizeof(struct cardbus_softc), pci_driver);
369
370 static devclass_t cardbus_devclass;
371
372 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
373 MODULE_VERSION(cardbus, 1);
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