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 * $FreeBSD$ 30 */ 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 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 51 #include <machine/bus.h> 52 #include <machine/resource.h> 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 75 /* 76 * Initial AR9285 / (WB195) bluetooth coexistence settings, 77 * just for experimentation. 78 * 79 * Return 0 for OK; errno for error. 80 * 81 * XXX TODO: There needs to be a PCIe workaround to disable ASPM if 82 * bluetooth coexistence is enabled. 83 */ 84 static int 85 ath_btcoex_cfg_wb195(struct ath_softc *sc) 86 { 87 HAL_BT_COEX_INFO btinfo; 88 HAL_BT_COEX_CONFIG btconfig; 89 struct ath_hal *ah = sc->sc_ah; 90 91 if (! ath_hal_btcoex_supported(ah)) 92 return (EINVAL); 93 94 bzero(&btinfo, sizeof(btinfo)); 95 bzero(&btconfig, sizeof(btconfig)); 96 97 device_printf(sc->sc_dev, "Enabling WB195 BTCOEX\n"); 98 99 btinfo.bt_module = HAL_BT_MODULE_JANUS; 100 btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE; 101 /* 102 * These are the three GPIO pins hooked up between the AR9285 and 103 * the AR3011. 104 */ 105 btinfo.bt_gpio_bt_active = 6; 106 btinfo.bt_gpio_bt_priority = 7; 107 btinfo.bt_gpio_wlan_active = 5; 108 btinfo.bt_active_polarity = 1; /* XXX not used */ 109 btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */ 110 btinfo.bt_isolation = 0; /* in dB, not used */ 111 112 ath_hal_btcoex_set_info(ah, &btinfo); 113 114 btconfig.bt_time_extend = 0; 115 btconfig.bt_txstate_extend = 1; /* true */ 116 btconfig.bt_txframe_extend = 1; /* true */ 117 btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED; 118 btconfig.bt_quiet_collision = 1; /* true */ 119 btconfig.bt_rxclear_polarity = 1; /* true */ 120 btconfig.bt_priority_time = 2; 121 btconfig.bt_first_slot_time = 5; 122 btconfig.bt_hold_rxclear = 1; /* true */ 123 124 ath_hal_btcoex_set_config(ah, &btconfig); 125 126 /* 127 * Enable antenna diversity. 128 */ 129 ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1); 130 131 return (0); 132 } 133 134 /* 135 * Initial AR9485 / (WB225) bluetooth coexistence settings, 136 * just for experimentation. 137 * 138 * Return 0 for OK; errno for error. 139 */ 140 static int 141 ath_btcoex_cfg_wb225(struct ath_softc *sc) 142 { 143 HAL_BT_COEX_INFO btinfo; 144 HAL_BT_COEX_CONFIG btconfig; 145 struct ath_hal *ah = sc->sc_ah; 146 147 if (! ath_hal_btcoex_supported(ah)) 148 return (EINVAL); 149 150 bzero(&btinfo, sizeof(btinfo)); 151 bzero(&btconfig, sizeof(btconfig)); 152 153 device_printf(sc->sc_dev, "Enabling WB225 BTCOEX\n"); 154 155 btinfo.bt_module = HAL_BT_MODULE_JANUS; /* XXX not used? */ 156 btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE; 157 /* 158 * These are the three GPIO pins hooked up between the AR9485 and 159 * the bluetooth module. 160 */ 161 btinfo.bt_gpio_bt_active = 4; 162 btinfo.bt_gpio_bt_priority = 8; 163 btinfo.bt_gpio_wlan_active = 5; 164 165 btinfo.bt_active_polarity = 1; /* XXX not used */ 166 btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */ 167 btinfo.bt_isolation = 0; /* in dB, not used */ 168 169 ath_hal_btcoex_set_info(ah, &btinfo); 170 171 btconfig.bt_time_extend = 0; 172 btconfig.bt_txstate_extend = 1; /* true */ 173 btconfig.bt_txframe_extend = 1; /* true */ 174 btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED; 175 btconfig.bt_quiet_collision = 1; /* true */ 176 btconfig.bt_rxclear_polarity = 1; /* true */ 177 btconfig.bt_priority_time = 2; 178 btconfig.bt_first_slot_time = 5; 179 btconfig.bt_hold_rxclear = 1; /* true */ 180 181 ath_hal_btcoex_set_config(ah, &btconfig); 182 183 /* 184 * Enable antenna diversity. 185 */ 186 ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1); 187 188 return (0); 189 } 190 191 192 #if 0 193 /* 194 * When using bluetooth coexistence, ASPM needs to be disabled 195 * otherwise the sleeping interferes with the bluetooth (USB) 196 * operation and the MAC sleep/wakeup hardware. 197 * 198 * The PCIe powersave routine also needs to not be called 199 * by the driver during suspend/resume, else things will get 200 * a little odd. Check Linux ath9k for more details. 201 */ 202 static int 203 ath_btcoex_aspm_wb195(struct ath_softc *sc) 204 { 205 206 /* XXX TODO: clear device ASPM L0S and L1 */ 207 /* XXX TODO: clear _parent_ ASPM L0S and L1 */ 208 } 209 #endif 210 211 /* 212 * Methods which are required 213 */ 214 215 /* 216 * Attach btcoex to the given interface 217 */ 218 int 219 ath_btcoex_attach(struct ath_softc *sc) 220 { 221 int ret; 222 struct ath_hal *ah = sc->sc_ah; 223 const char *profname; 224 225 /* 226 * No chipset bluetooth coexistence? Then do nothing. 227 */ 228 if (! ath_hal_btcoex_supported(ah)) 229 return (0); 230 231 /* 232 * Look at the hints to determine which bluetooth 233 * profile to configure. 234 */ 235 ret = resource_string_value(device_get_name(sc->sc_dev), 236 device_get_unit(sc->sc_dev), 237 "btcoex_profile", 238 &profname); 239 if (ret != 0) { 240 /* nothing to do */ 241 return (0); 242 } 243 244 if (strncmp(profname, "wb195", 5) == 0) { 245 ret = ath_btcoex_cfg_wb195(sc); 246 } else if (strncmp(profname, "wb225", 5) == 0) { 247 ret = ath_btcoex_cfg_wb225(sc); 248 } else { 249 return (0); 250 } 251 252 /* 253 * Propagate up failure from the actual attach phase. 254 */ 255 if (ret != 0) 256 return (ret); 257 258 return (0); 259 } 260 261 /* 262 * Detach btcoex from the given interface 263 */ 264 int 265 ath_btcoex_detach(struct ath_softc *sc) 266 { 267 268 return (0); 269 } 270 271 /* 272 * Configure or disable bluetooth coexistence on the given channel. 273 * 274 * For AR9285/AR9287/AR9485, we'll never see a 5GHz channel, so we just 275 * assume bluetooth coexistence is always on. 276 * 277 * For AR9462, we may see a 5GHz channel; bluetooth coexistence should 278 * not be enabled on those channels. 279 */ 280 int 281 ath_btcoex_enable(struct ath_softc *sc, const struct ieee80211_channel *chan) 282 { 283 284 return (0); 285 } 286 287 /* 288 * Handle ioctl requests from the diagnostic interface. 289 * 290 * The initial part of this code resembles ath_ioctl_diag(); 291 * it's likely a good idea to reduce duplication between 292 * these two routines. 293 */ 294 int 295 ath_btcoex_ioctl(struct ath_softc *sc, struct ath_diag *ad) 296 { 297 unsigned int id = ad->ad_id & ATH_DIAG_ID; 298 void *indata = NULL; 299 void *outdata = NULL; 300 u_int32_t insize = ad->ad_in_size; 301 u_int32_t outsize = ad->ad_out_size; 302 int error = 0; 303 // int val; 304 305 if (ad->ad_id & ATH_DIAG_IN) { 306 /* 307 * Copy in data. 308 */ 309 indata = malloc(insize, M_TEMP, M_NOWAIT); 310 if (indata == NULL) { 311 error = ENOMEM; 312 goto bad; 313 } 314 error = copyin(ad->ad_in_data, indata, insize); 315 if (error) 316 goto bad; 317 } 318 if (ad->ad_id & ATH_DIAG_DYN) { 319 /* 320 * Allocate a buffer for the results (otherwise the HAL 321 * returns a pointer to a buffer where we can read the 322 * results). Note that we depend on the HAL leaving this 323 * pointer for us to use below in reclaiming the buffer; 324 * may want to be more defensive. 325 */ 326 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 327 if (outdata == NULL) { 328 error = ENOMEM; 329 goto bad; 330 } 331 } 332 switch (id) { 333 default: 334 error = EINVAL; 335 } 336 if (outsize < ad->ad_out_size) 337 ad->ad_out_size = outsize; 338 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size)) 339 error = EFAULT; 340 bad: 341 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 342 free(indata, M_TEMP); 343 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 344 free(outdata, M_TEMP); 345 return (error); 346 } 347 348