Support for the system suspend/resume.
In preparation for the run-time PM, implementation made
run-time PM friendly: common for system and run-time PM
code factored out as generic functions, albeit is_runtime
parameter value is always false currently.
For debug purposes, "PM" debug category introduced.
Policy: AP-like interface can't be suspended; otherwise
suspend is allowed. Hardware brought down if interface
was up. Connection, if existed, get lost.
Interface will be brought up upon resume if it was up
before suspend.
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/wil6210/Makefile | 1 +
drivers/net/wireless/ath/wil6210/pcie_bus.c | 69 ++++++++++++++++++++
drivers/net/wireless/ath/wil6210/pm.c | 98 +++++++++++++++++++++++++++++
drivers/net/wireless/ath/wil6210/wil6210.h | 5 ++
4 files changed, 173 insertions(+)
create mode 100644 drivers/net/wireless/ath/wil6210/pm.c
diff --git a/drivers/net/wireless/ath/wil6210/Makefile b/drivers/net/wireless/ath/wil6210/Makefile
index 050506f..64b4326 100644
--- a/drivers/net/wireless/ath/wil6210/Makefile
+++ b/drivers/net/wireless/ath/wil6210/Makefile
@@ -12,6 +12,7 @@ wil6210-y += debug.o
wil6210-y += rx_reorder.o
wil6210-y += ioctl.o
wil6210-y += fw.o
+wil6210-y += pm.o
wil6210-y += pmc.o
wil6210-$(CONFIG_WIL6210_TRACING) += trace.o
wil6210-y += wil_platform.o
diff --git a/drivers/net/wireless/ath/wil6210/pcie_bus.c b/drivers/net/wireless/ath/wil6210/pcie_bus.c
index c37838d..feff1ef 100644
--- a/drivers/net/wireless/ath/wil6210/pcie_bus.c
+++ b/drivers/net/wireless/ath/wil6210/pcie_bus.c
@@ -259,11 +259,80 @@ static const struct pci_device_id wil6210_pcie_ids[] = {
};
MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids);
+#ifdef CONFIG_PM
+
+static int wil6210_suspend(struct device *dev, bool is_runtime)
+{
+ int rc = 0;
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct wil6210_priv *wil = pci_get_drvdata(pdev);
+
+ wil_dbg_pm(wil, "%s(%s)\n", __func__,
+ is_runtime ? "runtime" : "system");
+
+ rc = wil_can_suspend(wil, is_runtime);
+ if (rc)
+ goto out;
+
+ rc = wil_suspend(wil, is_runtime);
+ if (rc)
+ goto out;
+
+ /* TODO: how do I bring card in low power state? */
+
+ /* disable bus mastering */
+ pci_clear_master(pdev);
+ /* PCI will call pci_save_state(pdev) and pci_prepare_to_sleep(pdev) */
+
+out:
+ return rc;
+}
+
+static int wil6210_resume(struct device *dev, bool is_runtime)
+{
+ int rc = 0;
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct wil6210_priv *wil = pci_get_drvdata(pdev);
+
+ wil_dbg_pm(wil, "%s(%s)\n", __func__,
+ is_runtime ? "runtime" : "system");
+
+ /* allow master */
+ pci_set_master(pdev);
+
+ rc = wil_resume(wil, is_runtime);
+ if (rc)
+ pci_clear_master(pdev);
+
+ return rc;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int wil6210_pm_suspend(struct device *dev)
+{
+ return wil6210_suspend(dev, false);
+}
+
+static int wil6210_pm_resume(struct device *dev)
+{
+ return wil6210_resume(dev, false);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+#endif /* CONFIG_PM */
+
+static const struct dev_pm_ops wil6210_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(wil6210_pm_suspend, wil6210_pm_resume)
+};
+
static struct pci_driver wil6210_driver = {
.probe = wil_pcie_probe,
.remove = wil_pcie_remove,
.id_table = wil6210_pcie_ids,
.name = WIL_NAME,
+ .driver = {
+ .pm = &wil6210_pm_ops,
+ },
};
static int __init wil6210_driver_init(void)
diff --git a/drivers/net/wireless/ath/wil6210/pm.c b/drivers/net/wireless/ath/wil6210/pm.c
new file mode 100644
index 0000000..0b7ecbc
--- /dev/null
+++ b/drivers/net/wireless/ath/wil6210/pm.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2014 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
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "wil6210.h"
+
+int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
+{
+ int rc = 0;
+ struct wireless_dev *wdev = wil->wdev;
+
+ wil_dbg_pm(wil, "%s(%s)\n", __func__,
+ is_runtime ? "runtime" : "system");
+
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_MONITOR:
+ case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_P2P_CLIENT:
+ break;
+ /* AP-like interface - can't suspend */
+ default:
+ wil_dbg_pm(wil, "AP-like interface\n");
+ rc = -EBUSY;
+ break;
+ }
+
+ wil_dbg_pm(wil, "%s(%s) => %s (%d)\n", __func__,
+ is_runtime ? "runtime" : "system", rc ? "No" : "Yes", rc);
+
+ return rc;
+}
+
+int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
+{
+ int rc = 0;
+ struct net_device *ndev = wil_to_ndev(wil);
+
+ wil_dbg_pm(wil, "%s(%s)\n", __func__,
+ is_runtime ? "runtime" : "system");
+
+ /* if netif up, hardware is alive, shut it down */
+ if (ndev->flags & IFF_UP) {
+ rc = wil_down(wil);
+ if (rc) {
+ wil_err(wil, "wil_down : %d\n", rc);
+ goto out;
+ }
+ }
+
+ if (wil->platform_ops.suspend)
+ rc = wil->platform_ops.suspend(wil->platform_handle);
+
+out:
+ wil_dbg_pm(wil, "%s(%s) => %d\n", __func__,
+ is_runtime ? "runtime" : "system", rc);
+ return rc;
+}
+
+int wil_resume(struct wil6210_priv *wil, bool is_runtime)
+{
+ int rc = 0;
+ struct net_device *ndev = wil_to_ndev(wil);
+
+ wil_dbg_pm(wil, "%s(%s)\n", __func__,
+ is_runtime ? "runtime" : "system");
+
+ if (wil->platform_ops.resume) {
+ rc = wil->platform_ops.resume(wil->platform_handle);
+ if (rc) {
+ wil_err(wil, "platform_ops.resume : %d\n", rc);
+ goto out;
+ }
+ }
+
+ /* if netif up, bring hardware up
+ * During open(), IFF_UP set after actual device method
+ * invocation. This prevent recursive call to wil_up()
+ */
+ if (ndev->flags & IFF_UP)
+ rc = wil_up(wil);
+
+out:
+ wil_dbg_pm(wil, "%s(%s) => %d\n", __func__,
+ is_runtime ? "runtime" : "system", rc);
+ return rc;
+}
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index c6b0fa2..dd4ea92 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -647,6 +647,7 @@ void wil_info(struct wil6210_priv *wil, const char *fmt, ...);
#define wil_dbg_txrx(wil, fmt, arg...) wil_dbg(wil, "DBG[TXRX]" fmt, ##arg)
#define wil_dbg_wmi(wil, fmt, arg...) wil_dbg(wil, "DBG[ WMI]" fmt, ##arg)
#define wil_dbg_misc(wil, fmt, arg...) wil_dbg(wil, "DBG[MISC]" fmt, ##arg)
+#define wil_dbg_pm(wil, fmt, arg...) wil_dbg(wil, "DBG[ PM ]" fmt, ##arg)
/* target operations */
/* register read */
@@ -815,4 +816,8 @@ int wil_iftype_nl2wmi(enum nl80211_iftype type);
int wil_ioctl(struct wil6210_priv *wil, void __user *data, int cmd);
int wil_request_firmware(struct wil6210_priv *wil, const char *name);
+int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime);
+int wil_suspend(struct wil6210_priv *wil, bool is_runtime);
+int wil_resume(struct wil6210_priv *wil, bool is_runtime);
+
#endif /* __WIL6210_H__ */
--
2.1.4
--
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