e21928d3c3
MCI bluetooth coexistence method for WB222. The rest of MCI requires a bunch more work, including adding a DMA buffer for the MCI hardware to bounce messages in/out of and handling MCI interrupts. But the more important part here is telling the HAL the btcoex is enabled and MCI is in use so it configures the correct initial bluetooth parameters in the wireless NIC and configures things like bluetooth traffic weights and such. So, this at least gets the HAL to do some of the right things in configuring the inital bluetooth coexistence stuff, but doesn't actually do full btcoex. That'll take.. some effort. Tested: * AR9462 (WB222), STA mode
416 lines
10 KiB
C
416 lines
10 KiB
C
/*-
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* Copyright (c) 2013 Adrian Chadd <adrian@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* This implements some very basic bluetooth coexistence methods for
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* the ath(4) hardware.
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*/
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#include "opt_ath.h"
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#include "opt_inet.h"
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysctl.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/errno.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_media.h>
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#include <net/if_arp.h>
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#include <net/ethernet.h> /* XXX for ether_sprintf */
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#include <net80211/ieee80211_var.h>
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#include <net/bpf.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#endif
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#include <dev/ath/if_athvar.h>
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#include <dev/ath/if_ath_btcoex.h>
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/*
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* Initial AR9285 / (WB195) bluetooth coexistence settings,
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* just for experimentation.
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*
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* Return 0 for OK; errno for error.
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*
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* XXX TODO: There needs to be a PCIe workaround to disable ASPM if
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* bluetooth coexistence is enabled.
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*/
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static int
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ath_btcoex_cfg_wb195(struct ath_softc *sc)
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{
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HAL_BT_COEX_INFO btinfo;
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HAL_BT_COEX_CONFIG btconfig;
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struct ath_hal *ah = sc->sc_ah;
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if (! ath_hal_btcoex_supported(ah))
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return (EINVAL);
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bzero(&btinfo, sizeof(btinfo));
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bzero(&btconfig, sizeof(btconfig));
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device_printf(sc->sc_dev, "Enabling WB195 BTCOEX\n");
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btinfo.bt_module = HAL_BT_MODULE_JANUS;
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btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE;
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/*
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* These are the three GPIO pins hooked up between the AR9285 and
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* the AR3011.
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*/
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btinfo.bt_gpio_bt_active = 6;
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btinfo.bt_gpio_bt_priority = 7;
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btinfo.bt_gpio_wlan_active = 5;
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btinfo.bt_active_polarity = 1; /* XXX not used */
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btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */
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btinfo.bt_isolation = 0; /* in dB, not used */
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ath_hal_btcoex_set_info(ah, &btinfo);
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btconfig.bt_time_extend = 0;
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btconfig.bt_txstate_extend = 1; /* true */
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btconfig.bt_txframe_extend = 1; /* true */
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btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
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btconfig.bt_quiet_collision = 1; /* true */
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btconfig.bt_rxclear_polarity = 1; /* true */
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btconfig.bt_priority_time = 2;
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btconfig.bt_first_slot_time = 5;
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btconfig.bt_hold_rxclear = 1; /* true */
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ath_hal_btcoex_set_config(ah, &btconfig);
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/*
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* Enable antenna diversity.
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*/
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ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1);
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return (0);
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}
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/*
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* Initial AR9485 / (WB225) bluetooth coexistence settings,
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* just for experimentation.
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*
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* Return 0 for OK; errno for error.
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*/
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static int
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ath_btcoex_cfg_wb225(struct ath_softc *sc)
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{
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HAL_BT_COEX_INFO btinfo;
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HAL_BT_COEX_CONFIG btconfig;
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struct ath_hal *ah = sc->sc_ah;
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if (! ath_hal_btcoex_supported(ah))
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return (EINVAL);
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bzero(&btinfo, sizeof(btinfo));
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bzero(&btconfig, sizeof(btconfig));
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device_printf(sc->sc_dev, "Enabling WB225 BTCOEX\n");
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btinfo.bt_module = HAL_BT_MODULE_JANUS; /* XXX not used? */
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btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE;
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/*
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* These are the three GPIO pins hooked up between the AR9485 and
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* the bluetooth module.
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*/
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btinfo.bt_gpio_bt_active = 4;
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btinfo.bt_gpio_bt_priority = 8;
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btinfo.bt_gpio_wlan_active = 5;
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btinfo.bt_active_polarity = 1; /* XXX not used */
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btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */
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btinfo.bt_isolation = 0; /* in dB, not used */
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ath_hal_btcoex_set_info(ah, &btinfo);
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btconfig.bt_time_extend = 0;
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btconfig.bt_txstate_extend = 1; /* true */
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btconfig.bt_txframe_extend = 1; /* true */
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btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
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btconfig.bt_quiet_collision = 1; /* true */
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btconfig.bt_rxclear_polarity = 1; /* true */
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btconfig.bt_priority_time = 2;
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btconfig.bt_first_slot_time = 5;
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btconfig.bt_hold_rxclear = 1; /* true */
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ath_hal_btcoex_set_config(ah, &btconfig);
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/*
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* Enable antenna diversity.
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*/
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ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1);
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return (0);
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}
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/*
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* Initial AR9462 / (WB222) bluetooth coexistence settings,
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* just for experimentation.
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*
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* Return 0 for OK; errno for error.
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*/
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static int
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ath_btcoex_cfg_wb222(struct ath_softc *sc)
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{
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HAL_BT_COEX_INFO btinfo;
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HAL_BT_COEX_CONFIG btconfig;
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struct ath_hal *ah = sc->sc_ah;
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if (! ath_hal_btcoex_supported(ah))
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return (EINVAL);
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bzero(&btinfo, sizeof(btinfo));
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bzero(&btconfig, sizeof(btconfig));
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device_printf(sc->sc_dev, "Enabling WB222 BTCOEX\n");
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btinfo.bt_module = HAL_BT_MODULE_JANUS; /* XXX not used? */
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btinfo.bt_coex_config = HAL_BT_COEX_CFG_MCI;
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/*
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* MCI uses a completely different interface to speak
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* to the bluetooth module - it's a command based
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* thing over a serial line, rather than
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* state pins to/from the bluetooth module.
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*
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* So, the GPIO configuration, polarity, etc
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* doesn't matter on MCI devices; it's just
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* completely ignored by the HAL.
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*/
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btinfo.bt_gpio_bt_active = 4;
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btinfo.bt_gpio_bt_priority = 8;
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btinfo.bt_gpio_wlan_active = 5;
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btinfo.bt_active_polarity = 1; /* XXX not used */
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btinfo.bt_single_ant = 0; /* 2 antenna on WB222 */
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btinfo.bt_isolation = 0; /* in dB, not used */
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ath_hal_btcoex_set_info(ah, &btinfo);
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btconfig.bt_time_extend = 0;
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btconfig.bt_txstate_extend = 1; /* true */
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btconfig.bt_txframe_extend = 1; /* true */
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btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
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btconfig.bt_quiet_collision = 1; /* true */
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btconfig.bt_rxclear_polarity = 1; /* true */
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btconfig.bt_priority_time = 2;
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btconfig.bt_first_slot_time = 5;
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btconfig.bt_hold_rxclear = 1; /* true */
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ath_hal_btcoex_set_config(ah, &btconfig);
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/*
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* Enable antenna diversity.
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*/
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ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1);
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return (0);
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}
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#if 0
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/*
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* When using bluetooth coexistence, ASPM needs to be disabled
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* otherwise the sleeping interferes with the bluetooth (USB)
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* operation and the MAC sleep/wakeup hardware.
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*
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* The PCIe powersave routine also needs to not be called
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* by the driver during suspend/resume, else things will get
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* a little odd. Check Linux ath9k for more details.
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*/
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static int
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ath_btcoex_aspm_wb195(struct ath_softc *sc)
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{
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/* XXX TODO: clear device ASPM L0S and L1 */
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/* XXX TODO: clear _parent_ ASPM L0S and L1 */
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}
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#endif
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/*
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* Methods which are required
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*/
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/*
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* Attach btcoex to the given interface
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*/
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int
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ath_btcoex_attach(struct ath_softc *sc)
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{
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int ret;
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struct ath_hal *ah = sc->sc_ah;
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const char *profname;
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/*
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* No chipset bluetooth coexistence? Then do nothing.
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*/
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if (! ath_hal_btcoex_supported(ah))
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return (0);
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/*
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* Look at the hints to determine which bluetooth
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* profile to configure.
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*/
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ret = resource_string_value(device_get_name(sc->sc_dev),
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device_get_unit(sc->sc_dev),
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"btcoex_profile",
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&profname);
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if (ret != 0) {
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/* nothing to do */
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return (0);
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}
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if (strncmp(profname, "wb195", 5) == 0) {
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ret = ath_btcoex_cfg_wb195(sc);
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} else if (strncmp(profname, "wb222", 5) == 0) {
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ret = ath_btcoex_cfg_wb222(sc);
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} else if (strncmp(profname, "wb225", 5) == 0) {
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ret = ath_btcoex_cfg_wb225(sc);
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} else {
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return (0);
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}
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/*
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* Propagate up failure from the actual attach phase.
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*/
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if (ret != 0)
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return (ret);
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return (0);
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}
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/*
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* Detach btcoex from the given interface
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*/
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int
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ath_btcoex_detach(struct ath_softc *sc)
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{
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return (0);
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}
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/*
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* Configure or disable bluetooth coexistence on the given channel.
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*
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* For AR9285/AR9287/AR9485, we'll never see a 5GHz channel, so we just
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* assume bluetooth coexistence is always on.
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*
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* For AR9462, we may see a 5GHz channel; bluetooth coexistence should
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* not be enabled on those channels.
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*/
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int
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ath_btcoex_enable(struct ath_softc *sc, const struct ieee80211_channel *chan)
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{
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return (0);
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}
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/*
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* Handle ioctl requests from the diagnostic interface.
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*
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* The initial part of this code resembles ath_ioctl_diag();
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* it's likely a good idea to reduce duplication between
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* these two routines.
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*/
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int
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ath_btcoex_ioctl(struct ath_softc *sc, struct ath_diag *ad)
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{
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unsigned int id = ad->ad_id & ATH_DIAG_ID;
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void *indata = NULL;
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void *outdata = NULL;
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u_int32_t insize = ad->ad_in_size;
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u_int32_t outsize = ad->ad_out_size;
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int error = 0;
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// int val;
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if (ad->ad_id & ATH_DIAG_IN) {
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/*
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* Copy in data.
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*/
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indata = malloc(insize, M_TEMP, M_NOWAIT);
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if (indata == NULL) {
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error = ENOMEM;
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goto bad;
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}
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error = copyin(ad->ad_in_data, indata, insize);
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if (error)
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goto bad;
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}
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if (ad->ad_id & ATH_DIAG_DYN) {
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/*
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* Allocate a buffer for the results (otherwise the HAL
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* returns a pointer to a buffer where we can read the
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* results). Note that we depend on the HAL leaving this
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* pointer for us to use below in reclaiming the buffer;
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* may want to be more defensive.
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*/
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outdata = malloc(outsize, M_TEMP, M_NOWAIT);
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if (outdata == NULL) {
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error = ENOMEM;
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goto bad;
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}
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}
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switch (id) {
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default:
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error = EINVAL;
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}
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if (outsize < ad->ad_out_size)
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ad->ad_out_size = outsize;
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if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size))
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error = EFAULT;
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bad:
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if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL)
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free(indata, M_TEMP);
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if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL)
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free(outdata, M_TEMP);
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return (error);
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}
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