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staging: wfx: add support for 'device too hot' indication

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Device is able to detect a high temperature. In this case, the traffic
is not allowed to be sent until the temperature decrease.

This patch detects the warnings raised by the device and stop the
traffic accordingly. It also add a delayed task as safeguard in case the
chip would never send the indication that the temperature decrease.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200427134031.323403-7-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jérôme Pouiller 2020-04-27 15:40:20 +02:00 committed by Greg Kroah-Hartman
parent 8e47df5fc4
commit 1d52d29983
5 changed files with 42 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/staging/wfx/hif_rx.c
View File

@ -235,12 +235,20 @@ static int hif_suspend_resume_indication(struct wfx_dev *wdev,
struct wfx_vif *wvif = wdev_to_wvif(wdev, hif->interface);
const struct hif_ind_suspend_resume_tx *body = buf;
WARN_ON(!wvif);
WARN(!body->suspend_resume_flags.bc_mc_only, "unsupported suspend/resume notification");
if (body->suspend_resume_flags.resume)
wfx_suspend_resume_mc(wvif, STA_NOTIFY_AWAKE);
else
wfx_suspend_resume_mc(wvif, STA_NOTIFY_SLEEP);
if (body->suspend_resume_flags.bc_mc_only) {
WARN_ON(!wvif);
if (body->suspend_resume_flags.resume)
wfx_suspend_resume_mc(wvif, STA_NOTIFY_AWAKE);
else
wfx_suspend_resume_mc(wvif, STA_NOTIFY_SLEEP);
} else {
WARN(body->peer_sta_set, "misunderstood indication");
WARN(hif->interface != 2, "misunderstood indication");
if (body->suspend_resume_flags.resume)
wfx_suspend_hot_dev(wdev, STA_NOTIFY_AWAKE);
else
wfx_suspend_hot_dev(wdev, STA_NOTIFY_SLEEP);
}
return 0;
}

2
drivers/staging/wfx/main.c
View File

@ -341,6 +341,8 @@ struct wfx_dev *wfx_init_common(struct device *dev,
mutex_init(&wdev->conf_mutex);
mutex_init(&wdev->rx_stats_lock);
init_completion(&wdev->firmware_ready);
INIT_DELAYED_WORK(&wdev->cooling_timeout_work,
wfx_cooling_timeout_work);
wfx_init_hif_cmd(&wdev->hif_cmd);
wfx_tx_queues_init(wdev);

23
drivers/staging/wfx/sta.c
View File

@ -38,6 +38,29 @@ u32 wfx_rate_mask_to_hw(struct wfx_dev *wdev, u32 rates)
return ret;
}
void wfx_cooling_timeout_work(struct work_struct *work)
{
struct wfx_dev *wdev = container_of(to_delayed_work(work),
struct wfx_dev,
cooling_timeout_work);
wdev->chip_frozen = true;
wfx_tx_unlock(wdev);
}
void wfx_suspend_hot_dev(struct wfx_dev *wdev, enum sta_notify_cmd cmd)
{
if (cmd == STA_NOTIFY_AWAKE) {
// Device recover normal temperature
if (cancel_delayed_work(&wdev->cooling_timeout_work))
wfx_tx_unlock(wdev);
} else {
// Device is too hot
schedule_delayed_work(&wdev->cooling_timeout_work, 10 * HZ);
wfx_tx_lock(wdev);
}
}
static void wfx_filter_beacon(struct wfx_vif *wvif, bool filter_beacon)
{
const struct hif_ie_table_entry filter_ies[] = {

2
drivers/staging/wfx/sta.h
View File

@ -67,6 +67,8 @@ void wfx_unassign_vif_chanctx(struct ieee80211_hw *hw,
struct ieee80211_chanctx_conf *conf);
// WSM Callbacks
void wfx_cooling_timeout_work(struct work_struct *work);
void wfx_suspend_hot_dev(struct wfx_dev *wdev, enum sta_notify_cmd cmd);
void wfx_suspend_resume_mc(struct wfx_vif *wvif, enum sta_notify_cmd cmd);
void wfx_event_report_rssi(struct wfx_vif *wvif, u8 raw_rcpi_rssi);

1
drivers/staging/wfx/wfx.h
View File

@ -45,6 +45,7 @@ struct wfx_dev {
struct hif_ind_startup hw_caps;
struct wfx_hif hif;
struct sl_context sl;
struct delayed_work cooling_timeout_work;
bool chip_frozen;
struct mutex conf_mutex;