1 /*-
2 * Copyright (c) 2007 Marvell Semiconductor, Inc.
3 * Copyright (c) 2007 Sam Leffler, Errno Consulting
4 * Copyright (c) 2008 Weongyo Jeong <weongyo@freebsd.org>
5 * All rights reserved.
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 * without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
15 * redistribution must be conditioned upon including a substantially
16 * similar Disclaimer requirement for further binary redistribution.
17 *
18 * NO WARRANTY
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
23 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
24 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
27 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
29 * THE POSSIBILITY OF SUCH DAMAGES.
30 */
31
32 #include <sys/cdefs.h>
33 #ifdef __FreeBSD__
34 __FBSDID("$FreeBSD$");
35 #endif
36
37 /*
38 * PCI front-end for the Marvell 88W8335 Wireless LAN controller driver.
39 */
40
41 #include <sys/param.h>
42 #include <sys/kernel.h>
43 #include <sys/module.h>
44 #include <sys/socket.h>
45 #include <sys/sysctl.h>
46
47 #include <machine/bus.h>
48 #include <sys/bus.h>
49 #include <sys/rman.h>
50
51 #include <net/if.h>
52 #include <net/if_media.h>
53
54 #include <net80211/ieee80211_var.h>
55
56 #include <dev/malo/if_malo.h>
57
58 #include <dev/pci/pcivar.h>
59 #include <dev/pci/pcireg.h>
60
61 /*
62 * PCI glue.
63 */
64
65 #define MALO_RESOURCE_MAX 2
66 #define MALO_MSI_MESSAGES 1
67
68 struct malo_pci_softc {
69 struct malo_softc malo_sc;
70 struct resource_spec *malo_mem_spec;
71 struct resource *malo_res_mem[MALO_RESOURCE_MAX];
72 struct resource_spec *malo_irq_spec;
73 struct resource *malo_res_irq[MALO_MSI_MESSAGES];
74 void *malo_intrhand[MALO_MSI_MESSAGES];
75 int malo_msi;
76 };
77
78 /*
79 * Tunable variables.
80 */
81 SYSCTL_DECL(_hw_malo);
82 static SYSCTL_NODE(_hw_malo, OID_AUTO, pci, CTLFLAG_RD, 0,
83 "Marvell 88W8335 driver PCI parameters");
84
85 static int msi_disable = 0; /* MSI disabled */
86 SYSCTL_INT(_hw_malo_pci, OID_AUTO, msi_disable, CTLFLAG_RW, &msi_disable,
87 0, "MSI disabled");
88 TUNABLE_INT("hw.malo.pci.msi_disable", &msi_disable);
89
90 /*
91 * Devices supported by this driver.
92 */
93 #define VENDORID_MARVELL 0X11AB
94 #define DEVICEID_MRVL_88W8310 0X1FA7
95 #define DEVICEID_MRVL_88W8335R1 0X1FAA
96 #define DEVICEID_MRVL_88W8335R2 0X1FAB
97
98 static struct malo_product {
99 uint16_t mp_vendorid;
100 uint16_t mp_deviceid;
101 const char *mp_name;
102 } malo_products[] = {
103 { VENDORID_MARVELL, DEVICEID_MRVL_88W8310,
104 "Marvell Libertas 88W8310 802.11g Wireless Adapter" },
105 { VENDORID_MARVELL, DEVICEID_MRVL_88W8335R1,
106 "Marvell Libertas 88W8335 802.11g Wireless Adapter" },
107 { VENDORID_MARVELL, DEVICEID_MRVL_88W8335R2,
108 "Marvell Libertas 88W8335 802.11g Wireless Adapter" }
109 };
110
111 static struct resource_spec malo_res_spec_mem[] = {
112 { SYS_RES_MEMORY, PCIR_BAR(0), RF_ACTIVE },
113 { SYS_RES_MEMORY, PCIR_BAR(1), RF_ACTIVE },
114 { -1, 0, 0 }
115 };
116
117 static struct resource_spec malo_res_spec_legacy[] = {
118 { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE },
119 { -1, 0, 0 }
120 };
121
122 static struct resource_spec malo_res_spec_msi[] = {
123 { SYS_RES_IRQ, 1, RF_ACTIVE },
124 { -1, 0, 0 }
125 };
126
127 static int malo_pci_detach(device_t);
128
129 static int
130 malo_pci_probe(device_t dev)
131 {
132 #define N(a) (sizeof(a) / sizeof((a)[0]))
133 struct malo_product *mp;
134 uint16_t vendor, devid;
135 int i;
136
137 vendor = pci_get_vendor(dev);
138 devid = pci_get_device(dev);
139 mp = malo_products;
140
141 for (i = 0; i < N(malo_products); i++, mp++) {
142 if (vendor == mp->mp_vendorid && devid == mp->mp_deviceid) {
143 device_set_desc(dev, mp->mp_name);
144 return (BUS_PROBE_DEFAULT);
145 }
146 }
147
148 return (ENXIO);
149 #undef N
150 }
151
152 static int
153 malo_pci_attach(device_t dev)
154 {
155 int error = ENXIO, i, msic, reg;
156 struct malo_pci_softc *psc = device_get_softc(dev);
157 struct malo_softc *sc = &psc->malo_sc;
158
159 sc->malo_dev = dev;
160
161 pci_enable_busmaster(dev);
162
163 /*
164 * Setup memory-mapping of PCI registers.
165 */
166 psc->malo_mem_spec = malo_res_spec_mem;
167 error = bus_alloc_resources(dev, psc->malo_mem_spec, psc->malo_res_mem);
168 if (error) {
169 device_printf(dev, "couldn't allocate memory resources\n");
170 return (ENXIO);
171 }
172
173 /*
174 * Arrange and allocate interrupt line.
175 */
176 sc->malo_invalid = 1;
177
178 if (pci_find_cap(dev, PCIY_EXPRESS, ®) == 0) {
179 msic = pci_msi_count(dev);
180 if (bootverbose)
181 device_printf(dev, "MSI count : %d\n", msic);
182 } else
183 msic = 0;
184
185 psc->malo_irq_spec = malo_res_spec_legacy;
186 if (msic == MALO_MSI_MESSAGES && msi_disable == 0) {
187 if (pci_alloc_msi(dev, &msic) == 0) {
188 if (msic == MALO_MSI_MESSAGES) {
189 device_printf(dev, "Using %d MSI messages\n",
190 msic);
191 psc->malo_irq_spec = malo_res_spec_msi;
192 psc->malo_msi = 1;
193 } else
194 pci_release_msi(dev);
195 }
196 }
197
198 error = bus_alloc_resources(dev, psc->malo_irq_spec, psc->malo_res_irq);
199 if (error) {
200 device_printf(dev, "couldn't allocate IRQ resources\n");
201 goto bad;
202 }
203
204 if (psc->malo_msi == 0)
205 error = bus_setup_intr(dev, psc->malo_res_irq[0],
206 INTR_TYPE_NET | INTR_MPSAFE, malo_intr, NULL, sc,
207 &psc->malo_intrhand[0]);
208 else {
209 for (i = 0; i < MALO_MSI_MESSAGES; i++) {
210 error = bus_setup_intr(dev, psc->malo_res_irq[i],
211 INTR_TYPE_NET | INTR_MPSAFE, malo_intr, NULL, sc,
212 &psc->malo_intrhand[i]);
213 if (error != 0)
214 break;
215 }
216 }
217
218 /*
219 * Setup DMA descriptor area.
220 */
221 if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
222 1, 0, /* alignment, bounds */
223 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
224 BUS_SPACE_MAXADDR, /* highaddr */
225 NULL, NULL, /* filter, filterarg */
226 BUS_SPACE_MAXSIZE, /* maxsize */
227 0, /* nsegments */
228 BUS_SPACE_MAXSIZE, /* maxsegsize */
229 0, /* flags */
230 NULL, /* lockfunc */
231 NULL, /* lockarg */
232 &sc->malo_dmat)) {
233 device_printf(dev, "cannot allocate DMA tag\n");
234 goto bad1;
235 }
236
237 sc->malo_io0t = rman_get_bustag(psc->malo_res_mem[0]);
238 sc->malo_io0h = rman_get_bushandle(psc->malo_res_mem[0]);
239 sc->malo_io1t = rman_get_bustag(psc->malo_res_mem[1]);
240 sc->malo_io1h = rman_get_bushandle(psc->malo_res_mem[1]);
241
242 error = malo_attach(pci_get_device(dev), sc);
243
244 if (error != 0)
245 goto bad2;
246
247 return (error);
248
249 bad2:
250 bus_dma_tag_destroy(sc->malo_dmat);
251 bad1:
252 if (psc->malo_msi == 0)
253 bus_teardown_intr(dev, psc->malo_res_irq[0],
254 psc->malo_intrhand[0]);
255 else {
256 for (i = 0; i < MALO_MSI_MESSAGES; i++)
257 bus_teardown_intr(dev, psc->malo_res_irq[i],
258 psc->malo_intrhand[i]);
259 }
260 bus_release_resources(dev, psc->malo_irq_spec, psc->malo_res_irq);
261 bad:
262 if (psc->malo_msi != 0)
263 pci_release_msi(dev);
264 bus_release_resources(dev, psc->malo_mem_spec, psc->malo_res_mem);
265
266 return (error);
267 }
268
269 static int
270 malo_pci_detach(device_t dev)
271 {
272 int i;
273 struct malo_pci_softc *psc = device_get_softc(dev);
274 struct malo_softc *sc = &psc->malo_sc;
275
276 /* check if device was removed */
277 sc->malo_invalid = !bus_child_present(dev);
278
279 malo_detach(sc);
280
281 bus_generic_detach(dev);
282
283 if (psc->malo_msi == 0)
284 bus_teardown_intr(dev, psc->malo_res_irq[0],
285 psc->malo_intrhand[0]);
286 else {
287 for (i = 0; i < MALO_MSI_MESSAGES; i++)
288 bus_teardown_intr(dev, psc->malo_res_irq[i],
289 psc->malo_intrhand[i]);
290
291 pci_release_msi(dev);
292 }
293
294 bus_release_resources(dev, psc->malo_irq_spec, psc->malo_res_irq);
295 bus_dma_tag_destroy(sc->malo_dmat);
296 bus_release_resources(dev, psc->malo_mem_spec, psc->malo_res_mem);
297
298 return (0);
299 }
300
301 static int
302 malo_pci_shutdown(device_t dev)
303 {
304 struct malo_pci_softc *psc = device_get_softc(dev);
305
306 malo_shutdown(&psc->malo_sc);
307
308 return (0);
309 }
310
311 static int
312 malo_pci_suspend(device_t dev)
313 {
314 struct malo_pci_softc *psc = device_get_softc(dev);
315
316 malo_suspend(&psc->malo_sc);
317
318 return (0);
319 }
320
321 static int
322 malo_pci_resume(device_t dev)
323 {
324 struct malo_pci_softc *psc = device_get_softc(dev);
325
326 malo_resume(&psc->malo_sc);
327
328 return (0);
329 }
330
331 static device_method_t malo_pci_methods[] = {
332 /* Device interface */
333 DEVMETHOD(device_probe, malo_pci_probe),
334 DEVMETHOD(device_attach, malo_pci_attach),
335 DEVMETHOD(device_detach, malo_pci_detach),
336 DEVMETHOD(device_shutdown, malo_pci_shutdown),
337 DEVMETHOD(device_suspend, malo_pci_suspend),
338 DEVMETHOD(device_resume, malo_pci_resume),
339 { 0,0 }
340 };
341
342 static driver_t malo_pci_driver = {
343 "malo",
344 malo_pci_methods,
345 sizeof(struct malo_pci_softc)
346 };
347
348 static devclass_t malo_devclass;
349 DRIVER_MODULE(malo, pci, malo_pci_driver, malo_devclass, 0, 0);
350 MODULE_VERSION(malo, 1);
351 MODULE_DEPEND(malo, wlan, 1, 1, 1); /* 802.11 media layer */
352 MODULE_DEPEND(malo, firmware, 1, 1, 1);
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