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path: root/drivers/net/wireless/ath/ath6kl/sdio.c
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Diffstat (limited to 'drivers/net/wireless/ath/ath6kl/sdio.c')
-rw-r--r--drivers/net/wireless/ath/ath6kl/sdio.c77
1 files changed, 61 insertions, 16 deletions
diff --git a/drivers/net/wireless/ath/ath6kl/sdio.c b/drivers/net/wireless/ath/ath6kl/sdio.c
index 4febee723495..53528648b425 100644
--- a/drivers/net/wireless/ath/ath6kl/sdio.c
+++ b/drivers/net/wireless/ath/ath6kl/sdio.c
@@ -1,5 +1,6 @@
/*
* Copyright (c) 2004-2011 Atheros Communications Inc.
+ * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -31,6 +32,7 @@
struct ath6kl_sdio {
struct sdio_func *func;
+ /* protects access to bus_req_freeq */
spinlock_t lock;
/* free list */
@@ -49,16 +51,20 @@ struct ath6kl_sdio {
/* scatter request list head */
struct list_head scat_req;
- /* Avoids disabling irq while the interrupts being handled */
- struct mutex mtx_irq;
+ atomic_t irq_handling;
+ wait_queue_head_t irq_wq;
+ /* protects access to scat_req */
spinlock_t scat_lock;
+
bool scatter_enabled;
bool is_disabled;
const struct sdio_device_id *id;
struct work_struct wr_async_work;
struct list_head wr_asyncq;
+
+ /* protects access to wr_asyncq */
spinlock_t wr_async_lock;
};
@@ -404,7 +410,10 @@ static int ath6kl_sdio_read_write_sync(struct ath6kl *ar, u32 addr, u8 *buf,
return -ENOMEM;
mutex_lock(&ar_sdio->dma_buffer_mutex);
tbuf = ar_sdio->dma_buffer;
- memcpy(tbuf, buf, len);
+
+ if (request & HIF_WRITE)
+ memcpy(tbuf, buf, len);
+
bounced = true;
} else
tbuf = buf;
@@ -462,7 +471,7 @@ static void ath6kl_sdio_irq_handler(struct sdio_func *func)
ath6kl_dbg(ATH6KL_DBG_SDIO, "irq\n");
ar_sdio = sdio_get_drvdata(func);
- mutex_lock(&ar_sdio->mtx_irq);
+ atomic_set(&ar_sdio->irq_handling, 1);
/*
* Release the host during interrups so we can pick it back up when
* we process commands.
@@ -471,7 +480,10 @@ static void ath6kl_sdio_irq_handler(struct sdio_func *func)
status = ath6kl_hif_intr_bh_handler(ar_sdio->ar);
sdio_claim_host(ar_sdio->func);
- mutex_unlock(&ar_sdio->mtx_irq);
+
+ atomic_set(&ar_sdio->irq_handling, 0);
+ wake_up(&ar_sdio->irq_wq);
+
WARN_ON(status && status != -ECANCELED);
}
@@ -572,6 +584,13 @@ static void ath6kl_sdio_irq_enable(struct ath6kl *ar)
sdio_release_host(ar_sdio->func);
}
+static bool ath6kl_sdio_is_on_irq(struct ath6kl *ar)
+{
+ struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
+
+ return !atomic_read(&ar_sdio->irq_handling);
+}
+
static void ath6kl_sdio_irq_disable(struct ath6kl *ar)
{
struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
@@ -579,14 +598,21 @@ static void ath6kl_sdio_irq_disable(struct ath6kl *ar)
sdio_claim_host(ar_sdio->func);
- mutex_lock(&ar_sdio->mtx_irq);
+ if (atomic_read(&ar_sdio->irq_handling)) {
+ sdio_release_host(ar_sdio->func);
+
+ ret = wait_event_interruptible(ar_sdio->irq_wq,
+ ath6kl_sdio_is_on_irq(ar));
+ if (ret)
+ return;
+
+ sdio_claim_host(ar_sdio->func);
+ }
ret = sdio_release_irq(ar_sdio->func);
if (ret)
ath6kl_err("Failed to release sdio irq: %d\n", ret);
- mutex_unlock(&ar_sdio->mtx_irq);
-
sdio_release_host(ar_sdio->func);
}
@@ -601,6 +627,8 @@ static struct hif_scatter_req *ath6kl_sdio_scatter_req_get(struct ath6kl *ar)
node = list_first_entry(&ar_sdio->scat_req,
struct hif_scatter_req, list);
list_del(&node->list);
+
+ node->scat_q_depth = get_queue_depth(&ar_sdio->scat_req);
}
spin_unlock_bh(&ar_sdio->scat_lock);
@@ -633,8 +661,8 @@ static int ath6kl_sdio_async_rw_scatter(struct ath6kl *ar,
return -EINVAL;
ath6kl_dbg(ATH6KL_DBG_SCATTER,
- "hif-scatter: total len: %d scatter entries: %d\n",
- scat_req->len, scat_req->scat_entries);
+ "hif-scatter: total len: %d scatter entries: %d\n",
+ scat_req->len, scat_req->scat_entries);
if (request & HIF_SYNCHRONOUS)
status = ath6kl_sdio_scat_rw(ar_sdio, scat_req->busrequest);
@@ -813,6 +841,7 @@ static int ath6kl_sdio_suspend(struct ath6kl *ar, struct cfg80211_wowlan *wow)
struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
struct sdio_func *func = ar_sdio->func;
mmc_pm_flag_t flags;
+ bool try_deepsleep = false;
int ret;
if (ar->state == ATH6KL_STATE_SCHED_SCAN) {
@@ -839,14 +868,22 @@ static int ath6kl_sdio_suspend(struct ath6kl *ar, struct cfg80211_wowlan *wow)
goto cut_pwr;
ret = ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_WOW, wow);
- if (ret)
+ if (ret && ret != -ENOTCONN)
+ ath6kl_err("wow suspend failed: %d\n", ret);
+
+ if (ret &&
+ (!ar->wow_suspend_mode ||
+ ar->wow_suspend_mode == WLAN_POWER_STATE_DEEP_SLEEP))
+ try_deepsleep = true;
+ else if (ret &&
+ ar->wow_suspend_mode == WLAN_POWER_STATE_CUT_PWR)
goto cut_pwr;
-
- return 0;
+ if (!ret)
+ return 0;
}
if (ar->suspend_mode == WLAN_POWER_STATE_DEEP_SLEEP ||
- !ar->suspend_mode) {
+ !ar->suspend_mode || try_deepsleep) {
flags = sdio_get_host_pm_caps(func);
if (!(flags & MMC_PM_KEEP_POWER))
@@ -901,8 +938,15 @@ static int ath6kl_sdio_resume(struct ath6kl *ar)
case ATH6KL_STATE_WOW:
break;
+
case ATH6KL_STATE_SCHED_SCAN:
break;
+
+ case ATH6KL_STATE_SUSPENDING:
+ break;
+
+ case ATH6KL_STATE_RESUMING:
+ break;
}
ath6kl_cfg80211_resume(ar);
@@ -981,7 +1025,7 @@ static int ath6kl_sdio_diag_read32(struct ath6kl *ar, u32 address, u32 *data)
(u8 *)data, sizeof(u32), HIF_RD_SYNC_BYTE_INC);
if (status) {
ath6kl_err("%s: failed to read from window data addr\n",
- __func__);
+ __func__);
return status;
}
@@ -1285,7 +1329,6 @@ static int ath6kl_sdio_probe(struct sdio_func *func,
spin_lock_init(&ar_sdio->scat_lock);
spin_lock_init(&ar_sdio->wr_async_lock);
mutex_init(&ar_sdio->dma_buffer_mutex);
- mutex_init(&ar_sdio->mtx_irq);
INIT_LIST_HEAD(&ar_sdio->scat_req);
INIT_LIST_HEAD(&ar_sdio->bus_req_freeq);
@@ -1293,6 +1336,8 @@ static int ath6kl_sdio_probe(struct sdio_func *func,
INIT_WORK(&ar_sdio->wr_async_work, ath6kl_sdio_write_async_work);
+ init_waitqueue_head(&ar_sdio->irq_wq);
+
for (count = 0; count < BUS_REQUEST_MAX_NUM; count++)
ath6kl_sdio_free_bus_req(ar_sdio, &ar_sdio->bus_req[count]);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 04:05:40 +0000