2 * Copyright (c) 2013 Adrian Chadd <adrian@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
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9 * notice, this list of conditions and the following disclaimer,
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14 * similar Disclaimer requirement for further binary redistribution.
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31 #include <sys/cdefs.h>
34 * This implements some very basic bluetooth coexistence methods for
35 * the ath(4) hardware.
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/sysctl.h>
44 #include <sys/kernel.h>
46 #include <sys/malloc.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_var.h>
58 #include <net/if_media.h>
59 #include <net/if_arp.h>
60 #include <net/ethernet.h> /* XXX for ether_sprintf */
62 #include <net80211/ieee80211_var.h>
67 #include <netinet/in.h>
68 #include <netinet/if_ether.h>
71 #include <dev/ath/if_athvar.h>
72 #include <dev/ath/if_ath_btcoex.h>
75 * Initial AR9285 / (WB195) bluetooth coexistence settings,
76 * just for experimentation.
78 * Return 0 for OK; errno for error.
80 * XXX TODO: There needs to be a PCIe workaround to disable ASPM if
81 * bluetooth coexistence is enabled.
84 ath_btcoex_cfg_wb195(struct ath_softc *sc)
86 HAL_BT_COEX_INFO btinfo;
87 HAL_BT_COEX_CONFIG btconfig;
88 struct ath_hal *ah = sc->sc_ah;
90 if (! ath_hal_btcoex_supported(ah))
93 bzero(&btinfo, sizeof(btinfo));
94 bzero(&btconfig, sizeof(btconfig));
96 device_printf(sc->sc_dev, "Enabling WB195 BTCOEX\n");
98 btinfo.bt_module = HAL_BT_MODULE_JANUS;
99 btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE;
101 * These are the three GPIO pins hooked up between the AR9285 and
104 btinfo.bt_gpio_bt_active = 6;
105 btinfo.bt_gpio_bt_priority = 7;
106 btinfo.bt_gpio_wlan_active = 5;
107 btinfo.bt_active_polarity = 1; /* XXX not used */
108 btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */
109 btinfo.bt_isolation = 0; /* in dB, not used */
111 ath_hal_btcoex_set_info(ah, &btinfo);
113 btconfig.bt_time_extend = 0;
114 btconfig.bt_txstate_extend = 1; /* true */
115 btconfig.bt_txframe_extend = 1; /* true */
116 btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
117 btconfig.bt_quiet_collision = 1; /* true */
118 btconfig.bt_rxclear_polarity = 1; /* true */
119 btconfig.bt_priority_time = 2;
120 btconfig.bt_first_slot_time = 5;
121 btconfig.bt_hold_rxclear = 1; /* true */
123 ath_hal_btcoex_set_config(ah, &btconfig);
126 * Enable antenna diversity.
128 ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1);
134 * Initial AR9485 / (WB225) bluetooth coexistence settings,
135 * just for experimentation.
137 * Return 0 for OK; errno for error.
140 ath_btcoex_cfg_wb225(struct ath_softc *sc)
142 HAL_BT_COEX_INFO btinfo;
143 HAL_BT_COEX_CONFIG btconfig;
144 struct ath_hal *ah = sc->sc_ah;
146 if (! ath_hal_btcoex_supported(ah))
149 bzero(&btinfo, sizeof(btinfo));
150 bzero(&btconfig, sizeof(btconfig));
152 device_printf(sc->sc_dev, "Enabling WB225 BTCOEX\n");
154 btinfo.bt_module = HAL_BT_MODULE_JANUS; /* XXX not used? */
155 btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE;
157 * These are the three GPIO pins hooked up between the AR9485 and
158 * the bluetooth module.
160 btinfo.bt_gpio_bt_active = 4;
161 btinfo.bt_gpio_bt_priority = 8;
162 btinfo.bt_gpio_wlan_active = 5;
164 btinfo.bt_active_polarity = 1; /* XXX not used */
165 btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */
166 btinfo.bt_isolation = 0; /* in dB, not used */
168 ath_hal_btcoex_set_info(ah, &btinfo);
170 btconfig.bt_time_extend = 0;
171 btconfig.bt_txstate_extend = 1; /* true */
172 btconfig.bt_txframe_extend = 1; /* true */
173 btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
174 btconfig.bt_quiet_collision = 1; /* true */
175 btconfig.bt_rxclear_polarity = 1; /* true */
176 btconfig.bt_priority_time = 2;
177 btconfig.bt_first_slot_time = 5;
178 btconfig.bt_hold_rxclear = 1; /* true */
180 ath_hal_btcoex_set_config(ah, &btconfig);
183 * Enable antenna diversity.
185 ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1);
193 * When using bluetooth coexistence, ASPM needs to be disabled
194 * otherwise the sleeping interferes with the bluetooth (USB)
195 * operation and the MAC sleep/wakeup hardware.
197 * The PCIe powersave routine also needs to not be called
198 * by the driver during suspend/resume, else things will get
199 * a little odd. Check Linux ath9k for more details.
202 ath_btcoex_aspm_wb195(struct ath_softc *sc)
205 /* XXX TODO: clear device ASPM L0S and L1 */
206 /* XXX TODO: clear _parent_ ASPM L0S and L1 */
211 * Methods which are required
215 * Attach btcoex to the given interface
218 ath_btcoex_attach(struct ath_softc *sc)
221 struct ath_hal *ah = sc->sc_ah;
222 const char *profname;
225 * No chipset bluetooth coexistence? Then do nothing.
227 if (! ath_hal_btcoex_supported(ah))
231 * Look at the hints to determine which bluetooth
232 * profile to configure.
234 ret = resource_string_value(device_get_name(sc->sc_dev),
235 device_get_unit(sc->sc_dev),
243 if (strncmp(profname, "wb195", 5) == 0) {
244 ret = ath_btcoex_cfg_wb195(sc);
245 } else if (strncmp(profname, "wb225", 5) == 0) {
246 ret = ath_btcoex_cfg_wb225(sc);
252 * Propagate up failure from the actual attach phase.
261 * Detach btcoex from the given interface
264 ath_btcoex_detach(struct ath_softc *sc)
271 * Configure or disable bluetooth coexistence on the given channel.
273 * For AR9285/AR9287/AR9485, we'll never see a 5GHz channel, so we just
274 * assume bluetooth coexistence is always on.
276 * For AR9462, we may see a 5GHz channel; bluetooth coexistence should
277 * not be enabled on those channels.
280 ath_btcoex_enable(struct ath_softc *sc, const struct ieee80211_channel *chan)
287 * Handle ioctl requests from the diagnostic interface.
289 * The initial part of this code resembles ath_ioctl_diag();
290 * it's likely a good idea to reduce duplication between
291 * these two routines.
294 ath_btcoex_ioctl(struct ath_softc *sc, struct ath_diag *ad)
296 unsigned int id = ad->ad_id & ATH_DIAG_ID;
298 void *outdata = NULL;
299 u_int32_t insize = ad->ad_in_size;
300 u_int32_t outsize = ad->ad_out_size;
304 if (ad->ad_id & ATH_DIAG_IN) {
308 indata = malloc(insize, M_TEMP, M_NOWAIT);
309 if (indata == NULL) {
313 error = copyin(ad->ad_in_data, indata, insize);
317 if (ad->ad_id & ATH_DIAG_DYN) {
319 * Allocate a buffer for the results (otherwise the HAL
320 * returns a pointer to a buffer where we can read the
321 * results). Note that we depend on the HAL leaving this
322 * pointer for us to use below in reclaiming the buffer;
323 * may want to be more defensive.
325 outdata = malloc(outsize, M_TEMP, M_NOWAIT);
326 if (outdata == NULL) {
335 if (outsize < ad->ad_out_size)
336 ad->ad_out_size = outsize;
337 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size))
340 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL)
341 free(indata, M_TEMP);
342 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL)
343 free(outdata, M_TEMP);