2 * Copyright (c) 2013 Adrian Chadd <adrian@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
35 * This implements some very basic bluetooth coexistence methods for
36 * the ath(4) hardware.
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/sysctl.h>
45 #include <sys/kernel.h>
47 #include <sys/mutex.h>
48 #include <sys/errno.h>
50 #include <machine/bus.h>
51 #include <machine/resource.h>
54 #include <sys/socket.h>
57 #include <net/if_media.h>
58 #include <net/if_arp.h>
59 #include <net/ethernet.h> /* XXX for ether_sprintf */
61 #include <net80211/ieee80211_var.h>
66 #include <netinet/in.h>
67 #include <netinet/if_ether.h>
70 #include <dev/ath/if_athvar.h>
71 #include <dev/ath/if_ath_btcoex.h>
74 * Initial AR9285 / (WB195) bluetooth coexistence settings,
75 * just for experimentation.
77 * Return 0 for OK; errno for error.
79 * XXX TODO: There needs to be a PCIe workaround to disable ASPM if
80 * bluetooth coexistence is enabled.
83 ath_btcoex_cfg_wb195(struct ath_softc *sc)
85 HAL_BT_COEX_INFO btinfo;
86 HAL_BT_COEX_CONFIG btconfig;
87 struct ath_hal *ah = sc->sc_ah;
89 if (! ath_hal_btcoex_supported(ah))
92 bzero(&btinfo, sizeof(btinfo));
93 bzero(&btconfig, sizeof(btconfig));
95 device_printf(sc->sc_dev, "Enabling WB195 BTCOEX\n");
97 btinfo.bt_module = HAL_BT_MODULE_JANUS;
98 btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE;
100 * These are the three GPIO pins hooked up between the AR9285 and
103 btinfo.bt_gpio_bt_active = 6;
104 btinfo.bt_gpio_bt_priority = 7;
105 btinfo.bt_gpio_wlan_active = 5;
106 btinfo.bt_active_polarity = 1; /* XXX not used */
107 btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */
108 btinfo.bt_isolation = 0; /* in dB, not used */
110 ath_hal_btcoex_set_info(ah, &btinfo);
112 btconfig.bt_time_extend = 0;
113 btconfig.bt_txstate_extend = 1; /* true */
114 btconfig.bt_txframe_extend = 1; /* true */
115 btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
116 btconfig.bt_quiet_collision = 1; /* true */
117 btconfig.bt_rxclear_polarity = 1; /* true */
118 btconfig.bt_priority_time = 2;
119 btconfig.bt_first_slot_time = 5;
120 btconfig.bt_hold_rxclear = 1; /* true */
122 ath_hal_btcoex_set_config(ah, &btconfig);
125 * Enable antenna diversity.
127 ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1);
133 * Initial AR9485 / (WB225) bluetooth coexistence settings,
134 * just for experimentation.
136 * Return 0 for OK; errno for error.
139 ath_btcoex_cfg_wb225(struct ath_softc *sc)
141 HAL_BT_COEX_INFO btinfo;
142 HAL_BT_COEX_CONFIG btconfig;
143 struct ath_hal *ah = sc->sc_ah;
145 if (! ath_hal_btcoex_supported(ah))
148 bzero(&btinfo, sizeof(btinfo));
149 bzero(&btconfig, sizeof(btconfig));
151 device_printf(sc->sc_dev, "Enabling WB225 BTCOEX\n");
153 btinfo.bt_module = HAL_BT_MODULE_JANUS; /* XXX not used? */
154 btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE;
156 * These are the three GPIO pins hooked up between the AR9485 and
157 * the bluetooth module.
159 btinfo.bt_gpio_bt_active = 4;
160 btinfo.bt_gpio_bt_priority = 8;
161 btinfo.bt_gpio_wlan_active = 5;
163 btinfo.bt_active_polarity = 1; /* XXX not used */
164 btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */
165 btinfo.bt_isolation = 0; /* in dB, not used */
167 ath_hal_btcoex_set_info(ah, &btinfo);
169 btconfig.bt_time_extend = 0;
170 btconfig.bt_txstate_extend = 1; /* true */
171 btconfig.bt_txframe_extend = 1; /* true */
172 btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
173 btconfig.bt_quiet_collision = 1; /* true */
174 btconfig.bt_rxclear_polarity = 1; /* true */
175 btconfig.bt_priority_time = 2;
176 btconfig.bt_first_slot_time = 5;
177 btconfig.bt_hold_rxclear = 1; /* true */
179 ath_hal_btcoex_set_config(ah, &btconfig);
182 * Enable antenna diversity.
184 ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1);
192 * When using bluetooth coexistence, ASPM needs to be disabled
193 * otherwise the sleeping interferes with the bluetooth (USB)
194 * operation and the MAC sleep/wakeup hardware.
196 * The PCIe powersave routine also needs to not be called
197 * by the driver during suspend/resume, else things will get
198 * a little odd. Check Linux ath9k for more details.
201 ath_btcoex_aspm_wb195(struct ath_softc *sc)
204 /* XXX TODO: clear device ASPM L0S and L1 */
205 /* XXX TODO: clear _parent_ ASPM L0S and L1 */
210 * Methods which are required
214 * Attach btcoex to the given interface
217 ath_btcoex_attach(struct ath_softc *sc)
220 struct ath_hal *ah = sc->sc_ah;
221 const char *profname;
224 * No chipset bluetooth coexistence? Then do nothing.
226 if (! ath_hal_btcoex_supported(ah))
230 * Look at the hints to determine which bluetooth
231 * profile to configure.
233 ret = resource_string_value(device_get_name(sc->sc_dev),
234 device_get_unit(sc->sc_dev),
242 if (strncmp(profname, "wb195", 5) == 0) {
243 ret = ath_btcoex_cfg_wb195(sc);
244 } else if (strncmp(profname, "wb225", 5) == 0) {
245 ret = ath_btcoex_cfg_wb225(sc);
251 * Propagate up failure from the actual attach phase.
260 * Detach btcoex from the given interface
263 ath_btcoex_detach(struct ath_softc *sc)
270 * Configure or disable bluetooth coexistence on the given channel.
272 * For AR9285/AR9287/AR9485, we'll never see a 5GHz channel, so we just
273 * assume bluetooth coexistence is always on.
275 * For AR9462, we may see a 5GHz channel; bluetooth coexistence should
276 * not be enabled on those channels.
279 ath_btcoex_enable(struct ath_softc *sc, const struct ieee80211_channel *chan)
286 * Handle ioctl requests from the diagnostic interface.
288 * The initial part of this code resembles ath_ioctl_diag();
289 * it's likely a good idea to reduce duplication between
290 * these two routines.
293 ath_btcoex_ioctl(struct ath_softc *sc, struct ath_diag *ad)
295 unsigned int id = ad->ad_id & ATH_DIAG_ID;
297 void *outdata = NULL;
298 u_int32_t insize = ad->ad_in_size;
299 u_int32_t outsize = ad->ad_out_size;
303 if (ad->ad_id & ATH_DIAG_IN) {
307 indata = malloc(insize, M_TEMP, M_NOWAIT);
308 if (indata == NULL) {
312 error = copyin(ad->ad_in_data, indata, insize);
316 if (ad->ad_id & ATH_DIAG_DYN) {
318 * Allocate a buffer for the results (otherwise the HAL
319 * returns a pointer to a buffer where we can read the
320 * results). Note that we depend on the HAL leaving this
321 * pointer for us to use below in reclaiming the buffer;
322 * may want to be more defensive.
324 outdata = malloc(outsize, M_TEMP, M_NOWAIT);
325 if (outdata == NULL) {
334 if (outsize < ad->ad_out_size)
335 ad->ad_out_size = outsize;
336 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size))
339 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL)
340 free(indata, M_TEMP);
341 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL)
342 free(outdata, M_TEMP);