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Message-Id: <200911160055.56451.rjw@sisk.pl>
Date: Mon, 16 Nov 2009 00:55:56 +0100
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: pm list <linux-pm@...ts.linux-foundation.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Linux PCI <linux-pci@...r.kernel.org>,
ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
Alan Stern <stern@...land.harvard.edu>,
Jesse Barnes <jbarnes@...tuousgeek.org>,
Matthew Garrett <mjg59@...f.ucam.org>,
Oliver Neukum <oliver@...kum.org>,
Shaohua Li <shaohua.li@...el.com>,
Bjorn Helgaas <bjorn.helgaas@...com>
Subject: [RFC][PATCH 8/10] ACPI / PM: Add more run-time wake-up fields
From: Rafael J. Wysocki <rjw@...k.pl>
Use the run_wake flag to mark all devices for which run-time wake-up
events may be generated by the platform. Introduce a new wake-up
flag, special, for marking devices that should be permanently enabled
to generate run-time events. Also, introduce a reference counter for
run-wake devices and a function that will initialize all of the
run-time wake-up fields for given device.
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
drivers/acpi/button.c | 2 ++
drivers/acpi/scan.c | 37 +++++++++++++++++++++++++++----------
drivers/acpi/wakeup.c | 2 +-
include/acpi/acpi_bus.h | 2 ++
4 files changed, 32 insertions(+), 11 deletions(-)
Index: linux-2.6/drivers/acpi/wakeup.c
===================================================================
--- linux-2.6.orig/drivers/acpi/wakeup.c
+++ linux-2.6/drivers/acpi/wakeup.c
@@ -106,7 +106,7 @@ int __init acpi_wakeup_device_init(void)
struct acpi_device,
wakeup_list);
/* In case user doesn't load button driver */
- if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled)
+ if (!dev->wakeup.flags.special || dev->wakeup.state.enabled)
continue;
acpi_ref_wakeup_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number);
Index: linux-2.6/include/acpi/acpi_bus.h
===================================================================
--- linux-2.6.orig/include/acpi/acpi_bus.h
+++ linux-2.6/include/acpi/acpi_bus.h
@@ -242,6 +242,7 @@ struct acpi_device_perf {
struct acpi_device_wakeup_flags {
u8 valid:1; /* Can successfully enable wakeup? */
u8 run_wake:1; /* Run-Wake GPE devices */
+ u8 special:1; /* Run-wake devices that are always enabled */
};
struct acpi_device_wakeup_state {
@@ -256,6 +257,7 @@ struct acpi_device_wakeup {
struct acpi_device_wakeup_state state;
struct acpi_device_wakeup_flags flags;
int prepare_count;
+ int run_wake_count;
};
/* Device */
Index: linux-2.6/drivers/acpi/button.c
===================================================================
--- linux-2.6.orig/drivers/acpi/button.c
+++ linux-2.6/drivers/acpi/button.c
@@ -419,6 +419,7 @@ static int acpi_button_add(struct acpi_d
device->wakeup.gpe_number);
acpi_ref_wakeup_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number);
+ device->wakeup.run_wake_count++;
device->wakeup.state.enabled = 1;
}
@@ -443,6 +444,7 @@ static int acpi_button_remove(struct acp
device->wakeup.gpe_number);
acpi_unref_wakeup_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number);
+ device->wakeup.run_wake_count--;
device->wakeup.state.enabled = 0;
}
Index: linux-2.6/drivers/acpi/scan.c
===================================================================
--- linux-2.6.orig/drivers/acpi/scan.c
+++ linux-2.6/drivers/acpi/scan.c
@@ -742,19 +742,39 @@ acpi_bus_extract_wakeup_device_power_pac
return AE_OK;
}
-static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
+static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
{
- acpi_status status = 0;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- union acpi_object *package = NULL;
- int psw_error;
-
struct acpi_device_id button_device_ids[] = {
{"PNP0C0D", 0},
{"PNP0C0C", 0},
{"PNP0C0E", 0},
{"", 0},
};
+ acpi_status status;
+ acpi_event_status event_status;
+
+ device->wakeup.run_wake_count = 0;
+
+ /* Power button, Lid switch always enable wakeup */
+ if (!acpi_match_device_ids(device, button_device_ids)) {
+ device->wakeup.flags.run_wake = 1;
+ device->wakeup.flags.special = 1;
+ return;
+ }
+
+ status = acpi_get_gpe_status(NULL, device->wakeup.gpe_number,
+ ACPI_NOT_ISR, &event_status);
+ if (status == AE_OK)
+ device->wakeup.flags.run_wake =
+ !!(event_status & ACPI_EVENT_FLAG_HANDLE);
+}
+
+static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
+{
+ acpi_status status = 0;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *package = NULL;
+ int psw_error;
/* _PRW */
status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
@@ -774,6 +794,7 @@ static int acpi_bus_get_wakeup_device_fl
device->wakeup.flags.valid = 1;
device->wakeup.prepare_count = 0;
+ acpi_bus_set_run_wake_flags(device);
/* Call _PSW/_DSW object to disable its ability to wake the sleeping
* system for the ACPI device with the _PRW object.
* The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
@@ -785,10 +806,6 @@ static int acpi_bus_get_wakeup_device_fl
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"error in _DSW or _PSW evaluation\n"));
- /* Power button, Lid switch always enable wakeup */
- if (!acpi_match_device_ids(device, button_device_ids))
- device->wakeup.flags.run_wake = 1;
-
end:
if (ACPI_FAILURE(status))
device->flags.wake_capable = 0;
--
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