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ath9k: Add concurrent WLAN and BT tx support for MCI based chips

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This feature enables both WLAN and BT can transmit simultaneously
by setting WLAN and BT to equal priorities. Whenever both are
transmitting, it might violate regulatory power limits. To avoid
regulatory violation, WLAN tx power will be adjusted according to BT
power index based on avaliability of BT scheduling message. If the
combined power exceeds threshold, BT transmission will be held off.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan
2012-10-12 14:07:23 +05:30
committed by John W. Linville
parent 50072ebca3
commit db60428b1a
5 changed files with 110 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

60
drivers/net/wireless/ath/ath9k/mci.c
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@@ -43,6 +43,7 @@ static bool ath_mci_add_profile(struct ath_common *common,
struct ath_mci_profile_info *info)
{
struct ath_mci_profile_info *entry;
u8 voice_priority[] = { 110, 110, 110, 112, 110, 110, 114, 116, 118 };
if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
(info->type == MCI_GPM_COEX_PROFILE_VOICE))
@@ -59,6 +60,12 @@ static bool ath_mci_add_profile(struct ath_common *common,
memcpy(entry, info, 10);
INC_PROF(mci, info);
list_add_tail(&entry->list, &mci->info);
if (info->type == MCI_GPM_COEX_PROFILE_VOICE) {
if (info->voice_type < sizeof(voice_priority))
mci->voice_priority = voice_priority[info->voice_type];
else
mci->voice_priority = 110;
}
return true;
}
@@ -250,6 +257,57 @@ static void ath9k_mci_work(struct work_struct *work)
ath_mci_update_scheme(sc);
}
static void ath_mci_update_stomp_txprio(u8 cur_txprio, u8 *stomp_prio)
{
if (cur_txprio < stomp_prio[ATH_BTCOEX_STOMP_NONE])
stomp_prio[ATH_BTCOEX_STOMP_NONE] = cur_txprio;
if (cur_txprio > stomp_prio[ATH_BTCOEX_STOMP_ALL])
stomp_prio[ATH_BTCOEX_STOMP_ALL] = cur_txprio;
if ((cur_txprio > ATH_MCI_HI_PRIO) &&
(cur_txprio < stomp_prio[ATH_BTCOEX_STOMP_LOW]))
stomp_prio[ATH_BTCOEX_STOMP_LOW] = cur_txprio;
}
static void ath_mci_set_concur_txprio(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_mci_profile *mci = &btcoex->mci;
u8 stomp_txprio[] = { 0, 0, 0, 0 }; /* all, low, none, low_ftp */
if (mci->num_mgmt) {
stomp_txprio[ATH_BTCOEX_STOMP_ALL] = ATH_MCI_INQUIRY_PRIO;
if (!mci->num_pan && !mci->num_other_acl)
stomp_txprio[ATH_BTCOEX_STOMP_NONE] =
ATH_MCI_INQUIRY_PRIO;
} else {
u8 prof_prio[] = { 50, 90, 94, 52 };/* RFCOMM, A2DP, HID, PAN */
stomp_txprio[ATH_BTCOEX_STOMP_LOW] =
stomp_txprio[ATH_BTCOEX_STOMP_NONE] = 0xff;
if (mci->num_sco)
ath_mci_update_stomp_txprio(mci->voice_priority,
stomp_txprio);
if (mci->num_other_acl)
ath_mci_update_stomp_txprio(prof_prio[0], stomp_txprio);
if (mci->num_a2dp)
ath_mci_update_stomp_txprio(prof_prio[1], stomp_txprio);
if (mci->num_hid)
ath_mci_update_stomp_txprio(prof_prio[2], stomp_txprio);
if (mci->num_pan)
ath_mci_update_stomp_txprio(prof_prio[3], stomp_txprio);
if (stomp_txprio[ATH_BTCOEX_STOMP_NONE] == 0xff)
stomp_txprio[ATH_BTCOEX_STOMP_NONE] = 0;
if (stomp_txprio[ATH_BTCOEX_STOMP_LOW] == 0xff)
stomp_txprio[ATH_BTCOEX_STOMP_LOW] = 0;
}
ath9k_hw_btcoex_set_concur_txprio(sc->sc_ah, stomp_txprio);
}
static u8 ath_mci_process_profile(struct ath_softc *sc,
struct ath_mci_profile_info *info)
{
@@ -281,6 +339,7 @@ static u8 ath_mci_process_profile(struct ath_softc *sc,
} else
ath_mci_del_profile(common, mci, entry);
ath_mci_set_concur_txprio(sc);
return 1;
}
@@ -314,6 +373,7 @@ static u8 ath_mci_process_status(struct ath_softc *sc,
mci->num_mgmt++;
} while (++i < ATH_MCI_MAX_PROFILE);
ath_mci_set_concur_txprio(sc);
if (old_num_mgmt != mci->num_mgmt)
return 1;