Commit 93cb679a authored by Vladimir Kondratiev's avatar Vladimir Kondratiev Committed by Kalle Valo
Browse files

wil6210: system power management



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: default avatarVladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: default avatarKalle Valo <kvalo@qca.qualcomm.com>
parent 0553640d
......@@ -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
......
......@@ -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)
......
/*
* 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;
}
......@@ -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__ */
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