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-rw-r--r--sys/dev/ath/if_ath.c31
-rw-r--r--sys/dev/ath/if_ath_btcoex.c281
-rw-r--r--sys/dev/ath/if_ath_btcoex.h40
3 files changed, 352 insertions, 0 deletions
diff --git a/sys/dev/ath/if_ath.c b/sys/dev/ath/if_ath.c
index 757ee6f..91c5bf6 100644
--- a/sys/dev/ath/if_ath.c
+++ b/sys/dev/ath/if_ath.c
@@ -111,6 +111,7 @@ __FBSDID("$FreeBSD$");
#include <dev/ath/if_ath_rx_edma.h>
#include <dev/ath/if_ath_tx_edma.h>
#include <dev/ath/if_ath_beacon.h>
+#include <dev/ath/if_ath_btcoex.h>
#include <dev/ath/if_ath_spectral.h>
#include <dev/ath/if_athdfs.h>
@@ -521,6 +522,14 @@ ath_attach(u_int16_t devid, struct ath_softc *sc)
goto bad2;
}
+ /* Attach bluetooth coexistence module */
+ if (ath_btcoex_attach(sc) < 0) {
+ device_printf(sc->sc_dev,
+ "%s: unable to attach bluetooth coexistence\n", __func__);
+ error = EIO;
+ goto bad2;
+ }
+
/* Start DFS processing tasklet */
TASK_INIT(&sc->sc_dfstask, 0, ath_dfs_tasklet, sc);
@@ -1029,6 +1038,7 @@ ath_detach(struct ath_softc *sc)
#ifdef ATH_DEBUG_ALQ
if_ath_alq_tidyup(&sc->sc_alq);
#endif
+ ath_btcoex_detach(sc);
ath_spectral_detach(sc);
ath_dfs_detach(sc);
ath_desc_free(sc);
@@ -1589,6 +1599,11 @@ ath_resume(struct ath_softc *sc)
ath_spectral_enable(sc, ic->ic_curchan);
/*
+ * Let bluetooth coexistence at in case it's needed for this channel
+ */
+ ath_btcoex_enable(sc, ic->ic_curchan);
+
+ /*
* If we're doing TDMA, enforce the TXOP limitation for chips that
* support it.
*/
@@ -2045,6 +2060,11 @@ ath_init(void *arg)
ath_spectral_enable(sc, ic->ic_curchan);
/*
+ * Let bluetooth coexistence at in case it's needed for this channel
+ */
+ ath_btcoex_enable(sc, ic->ic_curchan);
+
+ /*
* If we're doing TDMA, enforce the TXOP limitation for chips that
* support it.
*/
@@ -2384,6 +2404,11 @@ ath_reset(struct ifnet *ifp, ATH_RESET_TYPE reset_type)
ath_spectral_enable(sc, ic->ic_curchan);
/*
+ * Let bluetooth coexistence at in case it's needed for this channel
+ */
+ ath_btcoex_enable(sc, ic->ic_curchan);
+
+ /*
* If we're doing TDMA, enforce the TXOP limitation for chips that
* support it.
*/
@@ -4946,6 +4971,12 @@ ath_chan_set(struct ath_softc *sc, struct ieee80211_channel *chan)
ath_spectral_enable(sc, chan);
/*
+ * Let bluetooth coexistence at in case it's needed for this
+ * channel
+ */
+ ath_btcoex_enable(sc, ic->ic_curchan);
+
+ /*
* If we're doing TDMA, enforce the TXOP limitation for chips
* that support it.
*/
diff --git a/sys/dev/ath/if_ath_btcoex.c b/sys/dev/ath/if_ath_btcoex.c
new file mode 100644
index 0000000..ef9073d
--- /dev/null
+++ b/sys/dev/ath/if_ath_btcoex.c
@@ -0,0 +1,281 @@
+/*-
+ * Copyright (c) 2013 Adrian Chadd <adrian@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ * redistribution must be conditioned upon including a substantially
+ * similar Disclaimer requirement for further binary redistribution.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * $FreeBSD$
+ */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * This implements some very basic bluetooth coexistence methods for
+ * the ath(4) hardware.
+ */
+#include "opt_ath.h"
+#include "opt_inet.h"
+#include "opt_wlan.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sysctl.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/errno.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/bus.h>
+
+#include <sys/socket.h>
+
+#include <net/if.h>
+#include <net/if_media.h>
+#include <net/if_arp.h>
+#include <net/ethernet.h> /* XXX for ether_sprintf */
+
+#include <net80211/ieee80211_var.h>
+
+#include <net/bpf.h>
+
+#ifdef INET
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+#endif
+
+#include <dev/ath/if_athvar.h>
+#include <dev/ath/if_ath_btcoex.h>
+
+/*
+ * Initial AR9285 / (WB195) bluetooth coexistence settings,
+ * just for experimentation.
+ *
+ * Return 0 for OK; errno for error.
+ *
+ * XXX TODO: There needs to be a PCIe workaround to disable ASPM if
+ * bluetooth coexistence is enabled.
+ */
+static int
+ath_btcoex_cfg_wb195(struct ath_softc *sc)
+{
+ HAL_BT_COEX_INFO btinfo;
+ HAL_BT_COEX_CONFIG btconfig;
+ struct ath_hal *ah = sc->sc_ah;
+
+ if (! ath_hal_btcoex_supported(ah))
+ return (EINVAL);
+
+ bzero(&btinfo, sizeof(btinfo));
+ bzero(&btconfig, sizeof(btconfig));
+
+ device_printf(sc->sc_dev, "Enabling WB195 BTCOEX\n");
+
+ btinfo.bt_module = HAL_BT_MODULE_JANUS;
+ btinfo.bt_coex_config = HAL_BT_COEX_CFG_3WIRE;
+ /*
+ * These are the three GPIO pins hooked up between the AR9285 and
+ * the AR3011.
+ */
+ btinfo.bt_gpio_bt_active = 6;
+ btinfo.bt_gpio_bt_priority = 7;
+ btinfo.bt_gpio_wlan_active = 5;
+ btinfo.bt_active_polarity = 1; /* XXX not used */
+ btinfo.bt_single_ant = 1; /* 1 antenna on ar9285 ? */
+ btinfo.bt_isolation = 0; /* in dB, not used */
+
+ ath_hal_btcoex_set_info(ah, &btinfo);
+
+ btconfig.bt_time_extend = 0;
+ btconfig.bt_txstate_extend = 1; /* true */
+ btconfig.bt_txframe_extend = 1; /* true */
+ btconfig.bt_mode = HAL_BT_COEX_MODE_SLOTTED;
+ btconfig.bt_quiet_collision = 1; /* true */
+ btconfig.bt_rxclear_polarity = 1; /* true */
+ btconfig.bt_priority_time = 2;
+ btconfig.bt_first_slot_time = 5;
+ btconfig.bt_hold_rxclear = 1; /* true */
+
+ ath_hal_btcoex_set_config(ah, &btconfig);
+
+ /*
+ * Enable antenna diversity.
+ */
+ ath_hal_btcoex_set_parameter(ah, HAL_BT_COEX_ANTENNA_DIVERSITY, 1);
+
+ return (0);
+}
+
+#if 0
+/*
+ * When using bluetooth coexistence, ASPM needs to be disabled
+ * otherwise the sleeping interferes with the bluetooth (USB)
+ * operation and the MAC sleep/wakeup hardware.
+ */
+static int
+ath_btcoex_aspm_wb195(struct ath_softc *sc)
+{
+
+ /* XXX TODO: clear device ASPM L0S and L1 */
+ /* XXX TODO: clear _parent_ ASPM L0S and L1 */
+}
+#endif
+
+/*
+ * Methods which are required
+ */
+
+/*
+ * Attach btcoex to the given interface
+ */
+int
+ath_btcoex_attach(struct ath_softc *sc)
+{
+ int ret;
+ struct ath_hal *ah = sc->sc_ah;
+ const char *profname;
+
+ /*
+ * No chipset bluetooth coexistence? Then do nothing.
+ */
+ if (! ath_hal_btcoex_supported(ah))
+ return (0);
+
+ /*
+ * Look at the hints to determine which bluetooth
+ * profile to configure.
+ */
+ ret = resource_string_value(device_get_name(sc->sc_dev),
+ device_get_unit(sc->sc_dev),
+ "btcoex_profile",
+ &profname);
+ if (ret != 0) {
+ /* nothing to do */
+ return (0);
+ }
+
+ if (strncmp(profname, "wb195", 5) == 0) {
+ ret = ath_btcoex_cfg_wb195(sc);
+ } else {
+ return (0);
+ }
+
+ /*
+ * Propagate up failure from the actual attach phase.
+ */
+ if (ret != 0)
+ return (ret);
+
+ return (0);
+}
+
+/*
+ * Detach btcoex from the given interface
+ */
+int
+ath_btcoex_detach(struct ath_softc *sc)
+{
+
+ return (0);
+}
+
+/*
+ * Configure or disable bluetooth coexistence on the given channel.
+ *
+ * For AR9285/AR9287/AR9485, we'll never see a 5GHz channel, so we just
+ * assume bluetooth coexistence is always on.
+ *
+ * For AR9462, we may see a 5GHz channel; bluetooth coexistence should
+ * not be enabled on those channels.
+ */
+int
+ath_btcoex_enable(struct ath_softc *sc, const struct ieee80211_channel *chan)
+{
+
+ return (0);
+}
+
+/*
+ * Handle ioctl requests from the diagnostic interface.
+ *
+ * The initial part of this code resembles ath_ioctl_diag();
+ * it's likely a good idea to reduce duplication between
+ * these two routines.
+ */
+int
+ath_btcoex_ioctl(struct ath_softc *sc, struct ath_diag *ad)
+{
+ unsigned int id = ad->ad_id & ATH_DIAG_ID;
+ void *indata = NULL;
+ void *outdata = NULL;
+ u_int32_t insize = ad->ad_in_size;
+ u_int32_t outsize = ad->ad_out_size;
+ int error = 0;
+// int val;
+
+ if (ad->ad_id & ATH_DIAG_IN) {
+ /*
+ * Copy in data.
+ */
+ indata = malloc(insize, M_TEMP, M_NOWAIT);
+ if (indata == NULL) {
+ error = ENOMEM;
+ goto bad;
+ }
+ error = copyin(ad->ad_in_data, indata, insize);
+ if (error)
+ goto bad;
+ }
+ if (ad->ad_id & ATH_DIAG_DYN) {
+ /*
+ * Allocate a buffer for the results (otherwise the HAL
+ * returns a pointer to a buffer where we can read the
+ * results). Note that we depend on the HAL leaving this
+ * pointer for us to use below in reclaiming the buffer;
+ * may want to be more defensive.
+ */
+ outdata = malloc(outsize, M_TEMP, M_NOWAIT);
+ if (outdata == NULL) {
+ error = ENOMEM;
+ goto bad;
+ }
+ }
+ switch (id) {
+ default:
+ error = EINVAL;
+ }
+ if (outsize < ad->ad_out_size)
+ ad->ad_out_size = outsize;
+ if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size))
+ error = EFAULT;
+bad:
+ if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL)
+ free(indata, M_TEMP);
+ if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL)
+ free(outdata, M_TEMP);
+ return (error);
+}
+
diff --git a/sys/dev/ath/if_ath_btcoex.h b/sys/dev/ath/if_ath_btcoex.h
new file mode 100644
index 0000000..8b175d2
--- /dev/null
+++ b/sys/dev/ath/if_ath_btcoex.h
@@ -0,0 +1,40 @@
+/*-
+ * Copyright (c) 2013 Adrian Chadd <adrian@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ * redistribution must be conditioned upon including a substantially
+ * similar Disclaimer requirement for further binary redistribution.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * $FreeBSD$
+ */
+#ifndef __IF_ATH_BTCOEX_H__
+#define __IF_ATH_BTCOEX_H__
+
+extern int ath_btcoex_attach(struct ath_softc *sc);
+extern int ath_btcoex_detach(struct ath_softc *sc);
+extern int ath_btcoex_ioctl(struct ath_softc *sc, struct ath_diag *ad);
+extern int ath_btcoex_enable(struct ath_softc *sc,
+ const struct ieee80211_channel *ch);
+
+#endif /* __IF_ATH_BTCOEX_H__ */
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