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ath6kl: cut power during suspend

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If sdio controller doesn't support keep power, cut power from hardware
during suspend and restart firmware during resume. If we are connected
during suspend, send a disconnected event to user space.

Earlier suspend failed with an error if sdio didn't support keep power.
Now suspend will happen succesfully even with that case.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Kalle Valo
2011-11-01 08:44:44 +02:00
parent e28e810486
commit b4b2a0b116
5 changed files with 90 additions and 8 deletions
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64
drivers/net/wireless/ath/ath6kl/sdio.c
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@@ -782,12 +782,11 @@ static int ath6kl_sdio_suspend(struct ath6kl *ar)
flags = sdio_get_host_pm_caps(func);
ath6kl_dbg(ATH6KL_DBG_SUSPEND, "sdio suspend pm_caps 0x%x\n", flags);
if (!(flags & MMC_PM_KEEP_POWER)) {
/* as host doesn't support keep power we need to bail out */
ath6kl_dbg(ATH6KL_DBG_SDIO,
"func %d doesn't support MMC_PM_KEEP_POWER\n",
func->num);
return -EINVAL;
/* as host doesn't support keep power we need to cut power */
return ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_CUTPOWER);
}
ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
@@ -797,13 +796,30 @@ static int ath6kl_sdio_suspend(struct ath6kl *ar)
return ret;
}
ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_DEEPSLEEP);
return 0;
return ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_DEEPSLEEP);
}
static int ath6kl_sdio_resume(struct ath6kl *ar)
{
switch (ar->state) {
case ATH6KL_STATE_OFF:
case ATH6KL_STATE_CUTPOWER:
ath6kl_dbg(ATH6KL_DBG_SUSPEND,
"sdio resume configuring sdio\n");
/* need to set sdio settings after power is cut from sdio */
ath6kl_sdio_config(ar);
break;
case ATH6KL_STATE_ON:
/* we shouldn't be on this state during resume */
WARN_ON(1);
break;
case ATH6KL_STATE_DEEPSLEEP:
break;
}
ath6kl_cfg80211_resume(ar);
return 0;
@@ -858,6 +874,37 @@ static const struct ath6kl_hif_ops ath6kl_sdio_ops = {
.stop = ath6kl_sdio_stop,
};
#ifdef CONFIG_PM_SLEEP
/*
* Empty handlers so that mmc subsystem doesn't remove us entirely during
* suspend. We instead follow cfg80211 suspend/resume handlers.
*/
static int ath6kl_sdio_pm_suspend(struct device *device)
{
ath6kl_dbg(ATH6KL_DBG_SUSPEND, "sdio pm suspend\n");
return 0;
}
static int ath6kl_sdio_pm_resume(struct device *device)
{
ath6kl_dbg(ATH6KL_DBG_SUSPEND, "sdio pm resume\n");
return 0;
}
static SIMPLE_DEV_PM_OPS(ath6kl_sdio_pm_ops, ath6kl_sdio_pm_suspend,
ath6kl_sdio_pm_resume);
#define ATH6KL_SDIO_PM_OPS (&ath6kl_sdio_pm_ops)
#else
#define ATH6KL_SDIO_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP */
static int ath6kl_sdio_probe(struct sdio_func *func,
const struct sdio_device_id *id)
{
@@ -969,6 +1016,7 @@ static struct sdio_driver ath6kl_sdio_driver = {
.id_table = ath6kl_sdio_devices,
.probe = ath6kl_sdio_probe,
.remove = ath6kl_sdio_remove,
.drv.pm = ATH6KL_SDIO_PM_OPS,
};
static int __init ath6kl_sdio_init(void)