1 /*-
2 * Copyright (c) 2013 Adrian Chadd <adrian@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.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 * redistribution must be conditioned upon including a substantially
14 * similar Disclaimer requirement for further binary redistribution.
15 *
16 * NO WARRANTY
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGES.
28 *
29 * $FreeBSD: releng/11.2/sys/dev/ath/if_ath_btcoex.c 332303 2018-04-08 20:50:16Z emaste $
30 */
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD: releng/11.2/sys/dev/ath/if_ath_btcoex.c 332303 2018-04-08 20:50:16Z emaste $");
33
34 /*
35 * This implements some very basic bluetooth coexistence methods for
36 * the ath(4) hardware.
37 */
38 #include "opt_ath.h"
39 #include "opt_inet.h"
40 #include "opt_wlan.h"
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/sysctl.h>
45 #include <sys/kernel.h>
46 #include <sys/lock.h>
47 #include <sys/malloc.h>
48 #include <sys/mutex.h>
49 #include <sys/errno.h>
50 #include <machine/bus.h>
51 #include <machine/resource.h>
52
53 #include <sys/bus.h>
54
55 #include <sys/socket.h>
56
57 #include <net/if.h>
58 #include <net/if_var.h>
59 #include <net/if_media.h>
60 #include <net/if_arp.h>
61 #include <net/ethernet.h> /* XXX for ether_sprintf */
62
63 #include <net80211/ieee80211_var.h>
64
65 #include <net/bpf.h>
66
67 #ifdef INET
68 #include <netinet/in.h>
69 #include <netinet/if_ether.h>
70 #endif
71
72 #include <dev/ath/if_athvar.h>
73 #include <dev/ath/if_ath_btcoex.h>
74 #include <dev/ath/if_ath_btcoex_mci.h>
75
76 MALLOC_DECLARE(M_ATHDEV);
77
78 /*
79 * Initial AR9285 / (WB195) bluetooth coexistence settings,
80 * just for experimentation.
81 *
82 * Return 0 for OK; errno for error.
83 *
84 * XXX TODO: There needs to be a PCIe workaround to disable ASPM if
85 * bluetooth coexistence is enabled.
86 */
87 static int
88 ath_btcoex_cfg_wb195(struct ath_softc *sc)
89 {
90 HAL_BT_COEX_INFO btinfo;
91 HAL_BT_COEX_CONFIG btconfig;
92 struct ath_hal *ah = sc->sc_ah;
93
94 if (! ath_hal_btcoex_supported(ah))
95 return (EINVAL);
96
97 bzero(&btinfo, sizeof(btinfo));
98 bzero(&btconfig, sizeof(btconfig));
99
100 device_printf(sc->sc_dev, "Enabling WB195 BTCOEX\n");
101
102 btinfo.bt_module = HAL_BT_MODULE_JANUS;
103 btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE;
104 /*
105 * These are the three GPIO pins hooked up between the AR9285 and
106 * the AR3011.
107 */
108 btinfo.bt_gpio_bt_active = 6;
109 btinfo.bt_gpio_bt_priority = 7;
110 btinfo.bt_gpio_wlan_active = 5;
111 btinfo.bt_active_polarity = 1; /* XXX not used */
112 btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */
113 btinfo.bt_isolation = 0; /* in dB, not used */
114
115 ath_hal_btcoex_set_info(ah, &btinfo);
116
117 btconfig.bt_time_extend = 0;
118 btconfig.bt_txstate_extend = 1; /* true */
119 btconfig.bt_txframe_extend = 1; /* true */
120 btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
121 btconfig.bt_quiet_collision = 1; /* true */
122 btconfig.bt_rxclear_polarity = 1; /* true */
123 btconfig.bt_priority_time = 2;
124 btconfig.bt_first_slot_time = 5;
125 btconfig.bt_hold_rxclear = 1; /* true */
126
127 ath_hal_btcoex_set_config(ah, &btconfig);
128
129 /*
130 * Enable antenna diversity.
131 */
132 ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1);
133
134 return (0);
135 }
136
137 /*
138 * Initial AR9485 / (WB225) bluetooth coexistence settings,
139 * just for experimentation.
140 *
141 * Return 0 for OK; errno for error.
142 */
143 static int
144 ath_btcoex_cfg_wb225(struct ath_softc *sc)
145 {
146 HAL_BT_COEX_INFO btinfo;
147 HAL_BT_COEX_CONFIG btconfig;
148 struct ath_hal *ah = sc->sc_ah;
149
150 if (! ath_hal_btcoex_supported(ah))
151 return (EINVAL);
152
153 bzero(&btinfo, sizeof(btinfo));
154 bzero(&btconfig, sizeof(btconfig));
155
156 device_printf(sc->sc_dev, "Enabling WB225 BTCOEX\n");
157
158 btinfo.bt_module = HAL_BT_MODULE_JANUS; /* XXX not used? */
159 btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE;
160 /*
161 * These are the three GPIO pins hooked up between the AR9485 and
162 * the bluetooth module.
163 */
164 btinfo.bt_gpio_bt_active = 4;
165 btinfo.bt_gpio_bt_priority = 8;
166 btinfo.bt_gpio_wlan_active = 5;
167
168 btinfo.bt_active_polarity = 1; /* XXX not used */
169 btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */
170 btinfo.bt_isolation = 0; /* in dB, not used */
171
172 ath_hal_btcoex_set_info(ah, &btinfo);
173
174 btconfig.bt_time_extend = 0;
175 btconfig.bt_txstate_extend = 1; /* true */
176 btconfig.bt_txframe_extend = 1; /* true */
177 btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
178 btconfig.bt_quiet_collision = 1; /* true */
179 btconfig.bt_rxclear_polarity = 1; /* true */
180 btconfig.bt_priority_time = 2;
181 btconfig.bt_first_slot_time = 5;
182 btconfig.bt_hold_rxclear = 1; /* true */
183
184 ath_hal_btcoex_set_config(ah, &btconfig);
185
186 /*
187 * Enable antenna diversity.
188 */
189 ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1);
190
191 return (0);
192 }
193
194 static int
195 ath_btcoex_cfg_mci(struct ath_softc *sc, uint32_t mci_cfg, int do_btdiv)
196 {
197 HAL_BT_COEX_INFO btinfo;
198 HAL_BT_COEX_CONFIG btconfig;
199 struct ath_hal *ah = sc->sc_ah;
200
201 if (! ath_hal_btcoex_supported(ah))
202 return (EINVAL);
203
204 bzero(&btinfo, sizeof(btinfo));
205 bzero(&btconfig, sizeof(btconfig));
206
207 sc->sc_ah->ah_config.ath_hal_mci_config = mci_cfg;
208
209 if (ath_btcoex_mci_attach(sc) != 0) {
210 device_printf(sc->sc_dev, "Failed to setup btcoex\n");
211 return (EINVAL);
212 }
213
214 btinfo.bt_module = HAL_BT_MODULE_JANUS; /* XXX not used? */
215 btinfo.bt_coex_config = HAL_BT_COEX_CFG_MCI;
216
217 /*
218 * MCI uses a completely different interface to speak
219 * to the bluetooth module - it's a command based
220 * thing over a serial line, rather than
221 * state pins to/from the bluetooth module.
222 *
223 * So, the GPIO configuration, polarity, etc
224 * doesn't matter on MCI devices; it's just
225 * completely ignored by the HAL.
226 */
227 btinfo.bt_gpio_bt_active = 4;
228 btinfo.bt_gpio_bt_priority = 8;
229 btinfo.bt_gpio_wlan_active = 5;
230
231 btinfo.bt_active_polarity = 1; /* XXX not used */
232 btinfo.bt_single_ant = 0; /* 2 antenna on WB335 */
233 btinfo.bt_isolation = 0; /* in dB, not used */
234
235 ath_hal_btcoex_set_info(ah, &btinfo);
236
237 btconfig.bt_time_extend = 0;
238 btconfig.bt_txstate_extend = 1; /* true */
239 btconfig.bt_txframe_extend = 1; /* true */
240 btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
241 btconfig.bt_quiet_collision = 1; /* true */
242 btconfig.bt_rxclear_polarity = 1; /* true */
243 btconfig.bt_priority_time = 2;
244 btconfig.bt_first_slot_time = 5;
245 btconfig.bt_hold_rxclear = 1; /* true */
246
247 ath_hal_btcoex_set_config(ah, &btconfig);
248
249 /* Enable */
250 ath_hal_btcoex_enable(sc->sc_ah);
251
252 /* Stomp */
253 ath_hal_btcoex_set_weights(ah, HAL_BT_COEX_STOMP_NONE);
254
255 /*
256 * Enable antenna diversity.
257 */
258 ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY,
259 do_btdiv);
260
261 return (0);
262 }
263
264 /*
265 * Initial AR9462 / (WB222) bluetooth coexistence settings.
266 *
267 * Return 0 for OK; errno for error.
268 */
269 static int
270 ath_btcoex_cfg_wb222(struct ath_softc *sc)
271 {
272
273 device_printf(sc->sc_dev, "Enabling WB222 BTCOEX\n");
274 /* XXX from ath9k */
275 return (ath_btcoex_cfg_mci(sc, 0x2201, 1));
276 }
277
278 /*
279 * Initial QCA9565 / (WB335B) bluetooth coexistence settings.
280 *
281 * Return 0 for OK; errno for error.
282 */
283 static int
284 ath_btcoex_cfg_wb335b(struct ath_softc *sc)
285 {
286 uint32_t flags;
287 int do_btdiv = 0;
288
289 /* ath9k default */
290 flags = 0xa4c1;
291
292 /* 1-ant and 2-ant AR9565 */
293 /*
294 * XXX TODO: ensure these actually make it down to the
295 * HAL correctly!
296 */
297 if (sc->sc_pci_devinfo & ATH_PCI_AR9565_1ANT) {
298 flags &= ~ATH_MCI_CONFIG_ANT_ARCH;
299 flags |= ATH_MCI_ANT_ARCH_1_ANT_PA_LNA_SHARED <<
300 ATH_MCI_CONFIG_ANT_ARCH_S;
301 } else if (sc->sc_pci_devinfo & ATH_PCI_AR9565_2ANT) {
302 flags &= ~ATH_MCI_CONFIG_ANT_ARCH;
303 flags |= ATH_MCI_ANT_ARCH_2_ANT_PA_LNA_NON_SHARED <<
304 ATH_MCI_CONFIG_ANT_ARCH_S;
305 }
306
307 if (sc->sc_pci_devinfo & ATH_PCI_BT_ANT_DIV) {
308 do_btdiv = 1;
309 }
310
311 device_printf(sc->sc_dev, "Enabling WB335 BTCOEX\n");
312 /* XXX from ath9k */
313 return (ath_btcoex_cfg_mci(sc, flags, do_btdiv));
314 }
315
316 #if 0
317 /*
318 * When using bluetooth coexistence, ASPM needs to be disabled
319 * otherwise the sleeping interferes with the bluetooth (USB)
320 * operation and the MAC sleep/wakeup hardware.
321 *
322 * The PCIe powersave routine also needs to not be called
323 * by the driver during suspend/resume, else things will get
324 * a little odd. Check Linux ath9k for more details.
325 */
326 static int
327 ath_btcoex_aspm_wb195(struct ath_softc *sc)
328 {
329
330 /* XXX TODO: clear device ASPM L0S and L1 */
331 /* XXX TODO: clear _parent_ ASPM L0S and L1 */
332 }
333 #endif
334
335 /*
336 * Methods which are required
337 */
338
339 /*
340 * Attach btcoex to the given interface
341 */
342 int
343 ath_btcoex_attach(struct ath_softc *sc)
344 {
345 int ret;
346 struct ath_hal *ah = sc->sc_ah;
347 const char *profname;
348
349 /*
350 * No chipset bluetooth coexistence? Then do nothing.
351 */
352 if (! ath_hal_btcoex_supported(ah))
353 return (0);
354
355 /*
356 * Look at the hints to determine which bluetooth
357 * profile to configure.
358 */
359 ret = resource_string_value(device_get_name(sc->sc_dev),
360 device_get_unit(sc->sc_dev),
361 "btcoex_profile",
362 &profname);
363 if (ret != 0) {
364 /* nothing to do */
365 return (0);
366 }
367
368 if (strncmp(profname, "wb195", 5) == 0) {
369 ret = ath_btcoex_cfg_wb195(sc);
370 } else if (strncmp(profname, "wb222", 5) == 0) {
371 ret = ath_btcoex_cfg_wb222(sc);
372 } else if (strncmp(profname, "wb225", 5) == 0) {
373 ret = ath_btcoex_cfg_wb225(sc);
374 } else if (strncmp(profname, "wb335", 5) == 0) {
375 ret = ath_btcoex_cfg_wb335b(sc);
376 } else {
377 return (0);
378 }
379
380 /*
381 * Propagate up failure from the actual attach phase.
382 */
383 if (ret != 0)
384 return (ret);
385
386 return (0);
387 }
388
389 /*
390 * Detach btcoex from the given interface
391 */
392 int
393 ath_btcoex_detach(struct ath_softc *sc)
394 {
395 if (sc->sc_btcoex_mci) {
396 ath_btcoex_mci_detach(sc);
397 }
398
399 return (0);
400 }
401
402 /*
403 * Configure or disable bluetooth coexistence on the given channel.
404 *
405 * For AR9285/AR9287/AR9485, we'll never see a 5GHz channel, so we just
406 * assume bluetooth coexistence is always on.
407 *
408 * For AR9462, we may see a 5GHz channel; bluetooth coexistence should
409 * not be enabled on those channels.
410 */
411 int
412 ath_btcoex_enable(struct ath_softc *sc, const struct ieee80211_channel *chan)
413 {
414 if (sc->sc_btcoex_mci) {
415 ath_btcoex_mci_enable(sc, chan);
416 }
417
418 return (0);
419 }
420
421 /*
422 * Handle ioctl requests from the diagnostic interface.
423 *
424 * The initial part of this code resembles ath_ioctl_diag();
425 * it's likely a good idea to reduce duplication between
426 * these two routines.
427 */
428 int
429 ath_btcoex_ioctl(struct ath_softc *sc, struct ath_diag *ad)
430 {
431 unsigned int id = ad->ad_id & ATH_DIAG_ID;
432 void *indata = NULL;
433 void *outdata = NULL;
434 u_int32_t insize = ad->ad_in_size;
435 u_int32_t outsize = ad->ad_out_size;
436 int error = 0;
437 // int val;
438
439 if (ad->ad_id & ATH_DIAG_IN) {
440 /*
441 * Copy in data.
442 */
443 indata = malloc(insize, M_TEMP, M_NOWAIT);
444 if (indata == NULL) {
445 error = ENOMEM;
446 goto bad;
447 }
448 error = copyin(ad->ad_in_data, indata, insize);
449 if (error)
450 goto bad;
451 }
452 if (ad->ad_id & ATH_DIAG_DYN) {
453 /*
454 * Allocate a buffer for the results (otherwise the HAL
455 * returns a pointer to a buffer where we can read the
456 * results). Note that we depend on the HAL leaving this
457 * pointer for us to use below in reclaiming the buffer;
458 * may want to be more defensive.
459 */
460 outdata = malloc(outsize, M_TEMP, M_NOWAIT | M_ZERO);
461 if (outdata == NULL) {
462 error = ENOMEM;
463 goto bad;
464 }
465 }
466 switch (id) {
467 default:
468 error = EINVAL;
469 goto bad;
470 }
471 if (outsize < ad->ad_out_size)
472 ad->ad_out_size = outsize;
473 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size))
474 error = EFAULT;
475 bad:
476 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL)
477 free(indata, M_TEMP);
478 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL)
479 free(outdata, M_TEMP);
480 return (error);
481 }
482
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