/*-
* Copyright (c) 2014 Qualcomm Atheros, Inc.
* Copyright (c) 2016 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: releng/12.0/sys/dev/ath/if_ath_btcoex_mci.c 301182 2016-06-02 01:59:41Z gnn $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: releng/12.0/sys/dev/ath/if_ath_btcoex_mci.c 301182 2016-06-02 01:59:41Z gnn $");
/*
* This implements the MCI bluetooth coexistence handling.
*/
#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/malloc.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_var.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_debug.h>
#include <dev/ath/if_ath_descdma.h>
#include <dev/ath/if_ath_btcoex.h>
#include <dev/ath/if_ath_btcoex_mci.h>
MALLOC_DECLARE(M_ATHDEV);
#define ATH_MCI_GPM_MAX_ENTRY 16
#define ATH_MCI_GPM_BUF_SIZE (ATH_MCI_GPM_MAX_ENTRY * 16)
#define ATH_MCI_SCHED_BUF_SIZE (16 * 16) /* 16 entries, 4 dword each */
static void ath_btcoex_mci_update_wlan_channels(struct ath_softc *sc);
int
ath_btcoex_mci_attach(struct ath_softc *sc)
{
int buflen, error;
buflen = ATH_MCI_GPM_BUF_SIZE + ATH_MCI_SCHED_BUF_SIZE;
error = ath_descdma_alloc_desc(sc, &sc->sc_btcoex.buf, NULL,
"MCI bufs", buflen, 1);
if (error != 0) {
device_printf(sc->sc_dev, "%s: failed to alloc MCI RAM\n",
__func__);
return (error);
}
/* Yes, we're going to do bluetooth MCI coex */
sc->sc_btcoex_mci = 1;
/* Initialise the wlan channel mapping */
sc->sc_btcoex.wlan_channels[0] = 0x00000000;
sc->sc_btcoex.wlan_channels[1] = 0xffffffff;
sc->sc_btcoex.wlan_channels[2] = 0xffffffff;
sc->sc_btcoex.wlan_channels[3] = 0x7fffffff;
/*
* Ok, so the API is a bit odd. It assumes sched_addr is
* after gpm_addr, and it does math to figure out the right
* sched_buf pointer.
*
* So, set gpm_addr to buf, sched_addr to gpm_addr + ATH_MCI_GPM_BUF_SIZE,
* the HAL call with do (gpm_buf + (sched_addr - gpm_addr)) to
* set sched_buf, and we're "golden".
*
* Note, it passes in 'len' here (gpm_len) as
* ATH_MCI_GPM_BUF_SIZE >> 4. My guess is that it's 16
* bytes per entry and we're storing 16 entries.
*/
sc->sc_btcoex.gpm_buf = (void *) sc->sc_btcoex.buf.dd_desc;
sc->sc_btcoex.sched_buf = sc->sc_btcoex.gpm_buf +
ATH_MCI_GPM_BUF_SIZE;
sc->sc_btcoex.gpm_paddr = sc->sc_btcoex.buf.dd_desc_paddr;
sc->sc_btcoex.sched_paddr = sc->sc_btcoex.gpm_paddr +
ATH_MCI_GPM_BUF_SIZE;
/* memset the gpm buffer with MCI_GPM_RSVD_PATTERN */
memset(sc->sc_btcoex.gpm_buf, 0xfe, buflen);
/*
* This is an unfortunate x86'ism in the HAL - the
* HAL code expects the passed in buffer to be
* coherent, and doesn't implement /any/ kind
* of buffer sync operations at all.
*
* So, this code will only work on dma coherent buffers
* and will behave poorly on non-coherent systems.
* Fixing this would require some HAL surgery so it
* actually /did/ the buffer flushing as appropriate.
*/
ath_hal_btcoex_mci_setup(sc->sc_ah,
sc->sc_btcoex.gpm_paddr,
sc->sc_btcoex.gpm_buf,
ATH_MCI_GPM_BUF_SIZE >> 4,
sc->sc_btcoex.sched_paddr);
return (0);
}
/*
* Detach btcoex from the given interface
*/
int
ath_btcoex_mci_detach(struct ath_softc *sc)
{
ath_hal_btcoex_mci_detach(sc->sc_ah);
ath_descdma_cleanup(sc, &sc->sc_btcoex.buf, NULL);
return (0);
}
/*
* Configure or disable bluetooth coexistence on the given channel.
*
* For MCI, we just use the top-level enable/disable flag, and
* then the MCI reset / channel update path will configure things
* appropriately based on the current band.
*/
int
ath_btcoex_mci_enable(struct ath_softc *sc,
const struct ieee80211_channel *chan)
{
/*
* Always reconfigure stomp-all for now, so wlan wins.
*
* The default weights still don't allow beacons to win,
* so unless you set net.wlan.X.bmiss_max to something higher,
* net80211 will disconnect you during a HCI INQUIRY command.
*
* The longer-term solution is to dynamically adjust whether
* bmiss happens based on bluetooth requirements, and look at
* making the individual stomp bits configurable.
*/
ath_hal_btcoex_set_weights(sc->sc_ah, HAL_BT_COEX_STOMP_ALL);
/*
* update wlan channels so the firmware knows what channels it
* can/can't use.
*/
ath_btcoex_mci_update_wlan_channels(sc);
return (0);
}
/*
* XXX TODO: turn into general btcoex, and then make this
* the MCI specific bits.
*/
static void
ath_btcoex_mci_event(struct ath_softc *sc, ATH_BT_COEX_EVENT nevent,
void *param)
{
if (! sc->sc_btcoex_mci)
return;
/*
* Check whether we need to flush our local profile cache.
* If we do, then at (XXX TODO) we should flush our state,
* then wait for the MCI response with the updated profile list.
*/
if (ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_NEED_FLUSH_BT_INFO, NULL) != 0) {
uint32_t data = 0;
if (ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_ENABLE, NULL) != 0) {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) Flush BT profile\n");
/*
* XXX TODO: flush profile state on the ath(4)
* driver side; subsequent messages will come
* through with the current list of active
* profiles.
*/
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_NEED_FLUSH_BT_INFO, &data);
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_SEND_STATUS_QUERY, NULL);
}
}
if (nevent == ATH_COEX_EVENT_BT_NOOP) {
DPRINTF(sc, ATH_DEBUG_BTCOEX, "(MCI) BT_NOOP\n");
return;
}
}
static void
ath_btcoex_mci_send_gpm(struct ath_softc *sc, uint32_t *payload)
{
ath_hal_btcoex_mci_send_message(sc->sc_ah, MCI_GPM, 0, payload, 16,
AH_FALSE, AH_TRUE);
}
/*
* This starts a BT calibration. It requires a chip reset.
*/
static int
ath_btcoex_mci_bt_cal_do(struct ath_softc *sc, int tx_timeout, int rx_timeout)
{
device_printf(sc->sc_dev, "%s: TODO!\n", __func__);
return (0);
}
static void
ath_btcoex_mci_cal_msg(struct ath_softc *sc, uint8_t opcode,
uint8_t *rx_payload)
{
uint32_t payload[4] = {0, 0, 0, 0};
switch (opcode) {
case MCI_GPM_BT_CAL_REQ:
DPRINTF(sc, ATH_DEBUG_BTCOEX, "(MCI) receive BT_CAL_REQ\n");
if (ath_hal_btcoex_mci_state(sc->sc_ah, HAL_MCI_STATE_BT,
NULL) == MCI_BT_AWAKE) {
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_SET_BT_CAL_START, NULL);
ath_btcoex_mci_bt_cal_do(sc, 1000, 1000);
} else {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) State mismatches: %d\n",
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_BT, NULL));
}
break;
case MCI_GPM_BT_CAL_DONE:
DPRINTF(sc, ATH_DEBUG_BTCOEX, "(MCI) receive BT_CAL_DONE\n");
if (ath_hal_btcoex_mci_state(sc->sc_ah, HAL_MCI_STATE_BT,
NULL) == MCI_BT_CAL) {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) ERROR ILLEGAL!\n");
} else {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) BT not in CAL state.\n");
}
break;
case MCI_GPM_BT_CAL_GRANT:
DPRINTF(sc, ATH_DEBUG_BTCOEX, "(MCI) receive BT_CAL_GRANT\n");
/* Send WLAN_CAL_DONE for now */
DPRINTF(sc, ATH_DEBUG_BTCOEX, "(MCI) Send WLAN_CAL_DONE\n");
MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_DONE);
ath_btcoex_mci_send_gpm(sc, &payload[0]);
break;
default:
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) Unknown GPM CAL message.\n");
break;
}
}
/*
* Update the bluetooth channel map.
*
* This map tells the bluetooth device which bluetooth channels
* are available for data.
*
* For 5GHz, all channels are available.
* For 2GHz, the current wifi channel range is blocked out,
* and the rest are available.
*
* This narrows which frequencies are used by the device when
* it initiates a transfer, thus hopefully reducing the chances
* of collisions (both hopefully on the current device and
* other devices in the same channel.)
*/
static void
ath_btcoex_mci_update_wlan_channels(struct ath_softc *sc)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ieee80211_channel *chan = ic->ic_curchan;
uint32_t channel_info[4] =
{ 0x00000000, 0xffffffff, 0xffffffff, 0x7fffffff };
int32_t wl_chan, bt_chan, bt_start = 0, bt_end = 79;
/* BT channel frequency is 2402 + k, k = 0 ~ 78 */
if (IEEE80211_IS_CHAN_2GHZ(chan)) {
wl_chan = chan->ic_freq - 2402;
if (IEEE80211_IS_CHAN_HT40U(chan)) {
bt_start = wl_chan - 10;
bt_end = wl_chan + 30;
} else if (IEEE80211_IS_CHAN_HT40D(chan)) {
bt_start = wl_chan - 30;
bt_end = wl_chan + 10;
} else {
/* Assume 20MHz */
bt_start = wl_chan - 10;
bt_end = wl_chan + 10;
}
bt_start -= 7;
bt_end += 7;
if (bt_start < 0) {
bt_start = 0;
}
if (bt_end > MCI_NUM_BT_CHANNELS) {
bt_end = MCI_NUM_BT_CHANNELS;
}
DPRINTF(sc, ATH_DEBUG_BTCOEX, "(MCI) WLAN use channel %d\n",
chan->ic_freq);
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) mask BT channel %d - %d\n", bt_start, bt_end);
for (bt_chan = bt_start; bt_chan < bt_end; bt_chan++) {
MCI_GPM_CLR_CHANNEL_BIT(&channel_info[0], bt_chan);
}
} else {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) WLAN not use any 2G channel, unmask all for BT\n");
}
ath_hal_btcoex_mci_state(sc->sc_ah, HAL_MCI_STATE_SEND_WLAN_CHANNELS,
&channel_info[0]);
}
static void
ath_btcoex_mci_coex_msg(struct ath_softc *sc, uint8_t opcode,
uint8_t *rx_payload)
{
uint32_t version;
uint8_t major;
uint8_t minor;
uint32_t seq_num;
switch (opcode) {
case MCI_GPM_COEX_VERSION_QUERY:
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) Recv GPM COEX Version Query.\n");
version = ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_SEND_WLAN_COEX_VERSION, NULL);
break;
case MCI_GPM_COEX_VERSION_RESPONSE:
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) Recv GPM COEX Version Response.\n");
major = *(rx_payload + MCI_GPM_COEX_B_MAJOR_VERSION);
minor = *(rx_payload + MCI_GPM_COEX_B_MINOR_VERSION);
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) BT Coex version: %d.%d\n", major, minor);
version = (major << 8) + minor;
version = ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_SET_BT_COEX_VERSION, &version);
break;
case MCI_GPM_COEX_STATUS_QUERY:
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) Recv GPM COEX Status Query = 0x%02x.\n",
*(rx_payload + MCI_GPM_COEX_B_WLAN_BITMAP));
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_SEND_WLAN_CHANNELS, NULL);
break;
case MCI_GPM_COEX_BT_PROFILE_INFO:
/*
* XXX TODO: here is where we'd parse active profile
* info and make driver/stack choices as appropriate.
*/
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) TODO: Recv GPM COEX BT_Profile_Info.\n");
break;
case MCI_GPM_COEX_BT_STATUS_UPDATE:
seq_num = *((uint32_t *)(rx_payload + 12));
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) Recv GPM COEX BT_Status_Update: SEQ=%d\n",
seq_num);
break;
default:
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) Unknown GPM COEX message = 0x%02x\n", opcode);
break;
}
}
void
ath_btcoex_mci_intr(struct ath_softc *sc)
{
uint32_t mciInt, mciIntRxMsg;
uint32_t offset, subtype, opcode;
uint32_t *pGpm;
uint32_t more_data = HAL_MCI_GPM_MORE;
int8_t value_dbm;
bool skip_gpm = false;
DPRINTF(sc, ATH_DEBUG_BTCOEX, "%s: called\n", __func__);
ath_hal_btcoex_mci_get_interrupt(sc->sc_ah, &mciInt, &mciIntRxMsg);
if (ath_hal_btcoex_mci_state(sc->sc_ah, HAL_MCI_STATE_ENABLE,
NULL) == 0) {
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_INIT_GPM_OFFSET, NULL);
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) INTR but MCI_disabled\n");
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) MCI interrupt: mciInt = 0x%x, mciIntRxMsg = 0x%x\n",
mciInt, mciIntRxMsg);
return;
}
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_REQ_WAKE) {
uint32_t payload4[4] = { 0xffffffff, 0xffffffff, 0xffffffff,
0xffffff00};
/*
* The following REMOTE_RESET and SYS_WAKING used to sent
* only when BT wake up. Now they are always sent, as a
* recovery method to reset BT MCI's RX alignment.
*/
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) 1. INTR Send REMOTE_RESET\n");
ath_hal_btcoex_mci_send_message(sc->sc_ah,
MCI_REMOTE_RESET, 0, payload4, 16, AH_TRUE, AH_FALSE);
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) 1. INTR Send SYS_WAKING\n");
ath_hal_btcoex_mci_send_message(sc->sc_ah,
MCI_SYS_WAKING, 0, NULL, 0, AH_TRUE, AH_FALSE);
mciIntRxMsg &= ~HAL_MCI_INTERRUPT_RX_MSG_REQ_WAKE;
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_RESET_REQ_WAKE, NULL);
/* always do this for recovery and 2G/5G toggling and LNA_TRANS */
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) 1. Set BT state to AWAKE.\n");
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_SET_BT_AWAKE, NULL);
}
/* Processing SYS_WAKING/SYS_SLEEPING */
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_SYS_WAKING) {
mciIntRxMsg &= ~HAL_MCI_INTERRUPT_RX_MSG_SYS_WAKING;
if (ath_hal_btcoex_mci_state(sc->sc_ah, HAL_MCI_STATE_BT,
NULL) == MCI_BT_SLEEP) {
if (ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_REMOTE_SLEEP, NULL) == MCI_BT_SLEEP) {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) 2. BT stays in SLEEP mode.\n");
} else {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) 2. Set BT state to AWAKE.\n");
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_SET_BT_AWAKE, NULL);
}
} else {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) 2. BT stays in AWAKE mode.\n");
}
}
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) {
mciIntRxMsg &= ~HAL_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING;
if (ath_hal_btcoex_mci_state(sc->sc_ah, HAL_MCI_STATE_BT,
NULL) == MCI_BT_AWAKE) {
if (ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_REMOTE_SLEEP, NULL) == MCI_BT_AWAKE) {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) 3. BT stays in AWAKE mode.\n");
} else {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) 3. Set BT state to SLEEP.\n");
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_SET_BT_SLEEP, NULL);
}
} else {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) 3. BT stays in SLEEP mode.\n");
}
}
/*
* Recover from out-of-order / wrong-offset GPM messages.
*/
if ((mciInt & HAL_MCI_INTERRUPT_RX_INVALID_HDR) ||
(mciInt & HAL_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) MCI RX broken, skip GPM messages\n");
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_RECOVER_RX, NULL);
skip_gpm = true;
}
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_SCHD_INFO) {
mciIntRxMsg &= ~HAL_MCI_INTERRUPT_RX_MSG_SCHD_INFO;
offset = ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_LAST_SCHD_MSG_OFFSET, NULL);
}
/*
* Parse GPM messages.
*/
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_GPM) {
mciIntRxMsg &= ~HAL_MCI_INTERRUPT_RX_MSG_GPM;
while (more_data == HAL_MCI_GPM_MORE) {
pGpm = (void *) sc->sc_btcoex.gpm_buf;
offset = ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_NEXT_GPM_OFFSET, &more_data);
if (offset == HAL_MCI_GPM_INVALID)
break;
pGpm += (offset >> 2);
/*
* The first DWORD is a timer.
* The real data starts from the second DWORD.
*/
subtype = MCI_GPM_TYPE(pGpm);
opcode = MCI_GPM_OPCODE(pGpm);
if (!skip_gpm) {
if (MCI_GPM_IS_CAL_TYPE(subtype)) {
ath_btcoex_mci_cal_msg(sc, subtype,
(uint8_t*) pGpm);
} else {
switch (subtype) {
case MCI_GPM_COEX_AGENT:
ath_btcoex_mci_coex_msg(sc,
opcode, (uint8_t*) pGpm);
break;
case MCI_GPM_BT_DEBUG:
device_printf(sc->sc_dev,
"(MCI) TODO: GPM_BT_DEBUG!\n");
break;
default:
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) Unknown GPM message.\n");
break;
}
}
}
MCI_GPM_RECYCLE(pGpm);
}
}
/*
* This is monitoring/management information messages, so the driver
* layer can hook in and dynamically adjust things like aggregation
* size, expected bluetooth/wifi traffic throughput, etc.
*
* None of that is done right now; it just passes off the values
* to the HAL so it can update its internal state as appropriate.
* This code just prints out the values for debugging purposes.
*/
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_MONITOR) {
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_LNA_CONTROL) {
mciIntRxMsg &= ~HAL_MCI_INTERRUPT_RX_MSG_LNA_CONTROL;
DPRINTF(sc, ATH_DEBUG_BTCOEX, "(MCI) LNA_CONTROL\n");
}
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_LNA_INFO) {
mciIntRxMsg &= ~HAL_MCI_INTERRUPT_RX_MSG_LNA_INFO;
DPRINTF(sc, ATH_DEBUG_BTCOEX, "(MCI) LNA_INFO\n");
}
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_CONT_INFO) {
value_dbm = ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_CONT_RSSI_POWER, NULL);
mciIntRxMsg &= ~HAL_MCI_INTERRUPT_RX_MSG_CONT_INFO;
if (ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_CONT_TXRX, NULL)) {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) CONT_INFO: (tx) pri = %d, pwr = %d dBm\n",
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_CONT_PRIORITY, NULL),
value_dbm);
} else {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) CONT_INFO: (rx) pri = %d, rssi = %d dBm\n",
ath_hal_btcoex_mci_state(sc->sc_ah,
HAL_MCI_STATE_CONT_PRIORITY, NULL),
value_dbm);
}
}
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_CONT_NACK) {
mciIntRxMsg &= ~HAL_MCI_INTERRUPT_RX_MSG_CONT_NACK;
DPRINTF(sc, ATH_DEBUG_BTCOEX, "(MCI) CONT_NACK\n");
}
if (mciIntRxMsg & HAL_MCI_INTERRUPT_RX_MSG_CONT_RST) {
mciIntRxMsg &= ~HAL_MCI_INTERRUPT_RX_MSG_CONT_RST;
DPRINTF(sc, ATH_DEBUG_BTCOEX, "(MCI) CONT_RST\n");
}
}
/*
* Recover the state engine if we hit an invalid header/timeout.
* This is the final part of GPT out-of-sync recovery.
*/
if ((mciInt & HAL_MCI_INTERRUPT_RX_INVALID_HDR) ||
(mciInt & HAL_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
ath_btcoex_mci_event(sc, ATH_COEX_EVENT_BT_NOOP, NULL);
mciInt &= ~(HAL_MCI_INTERRUPT_RX_INVALID_HDR |
HAL_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
}
if (mciIntRxMsg & 0xfffffffe) {
DPRINTF(sc, ATH_DEBUG_BTCOEX,
"(MCI) Not processed IntRxMsg = 0x%x\n", mciIntRxMsg);
}
}
↑ V523 The 'then' statement is equivalent to the 'else' statement.
↑ V523 The 'then' statement is equivalent to the 'else' statement.
↑ V547 Expression 'nevent == ATH_COEX_EVENT_BT_NOOP' is always true.