From 19d337dff95cbf76edd3ad95c0cee2732c3e1ec5 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes@sipsolutions.net>
Date: Tue, 2 Jun 2009 13:01:37 +0200
Subject: rfkill: rewrite
This patch completely rewrites the rfkill core to address
the following deficiencies:
* all rfkill drivers need to implement polling where necessary
rather than having one central implementation
* updating the rfkill state cannot be done from arbitrary
contexts, forcing drivers to use schedule_work and requiring
lots of code
* rfkill drivers need to keep track of soft/hard blocked
internally -- the core should do this
* the rfkill API has many unexpected quirks, for example being
asymmetric wrt. alloc/free and register/unregister
* rfkill can call back into a driver from within a function the
driver called -- this is prone to deadlocks and generally
should be avoided
* rfkill-input pointlessly is a separate module
* drivers need to #ifdef rfkill functions (unless they want to
depend on or select RFKILL) -- rfkill should provide inlines
that do nothing if it isn't compiled in
* the rfkill structure is not opaque -- drivers need to initialise
it correctly (lots of sanity checking code required) -- instead
force drivers to pass the right variables to rfkill_alloc()
* the documentation is hard to read because it always assumes the
reader is completely clueless and contains way TOO MANY CAPS
* the rfkill code needlessly uses a lot of locks and atomic
operations in locked sections
* fix LED trigger to actually change the LED when the radio state
changes -- this wasn't done before
Tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> [thinkpad]
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/platform/x86/eeepc-laptop.c | 99 +++++++++++--------------------------
1 file changed, 29 insertions(+), 70 deletions(-)
(limited to 'drivers/platform/x86/eeepc-laptop.c')
diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 353a898c369..1208d0cedd1 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -299,39 +299,22 @@ static int update_bl_status(struct backlight_device *bd)
* Rfkill helpers
*/
-static int eeepc_wlan_rfkill_set(void *data, enum rfkill_state state)
-{
- if (state == RFKILL_STATE_SOFT_BLOCKED)
- return set_acpi(CM_ASL_WLAN, 0);
- else
- return set_acpi(CM_ASL_WLAN, 1);
-}
-
-static int eeepc_wlan_rfkill_state(void *data, enum rfkill_state *state)
+static bool eeepc_wlan_rfkill_blocked(void)
{
if (get_acpi(CM_ASL_WLAN) == 1)
- *state = RFKILL_STATE_UNBLOCKED;
- else
- *state = RFKILL_STATE_SOFT_BLOCKED;
- return 0;
+ return false;
+ return true;
}
-static int eeepc_bluetooth_rfkill_set(void *data, enum rfkill_state state)
+static int eeepc_rfkill_set(void *data, bool blocked)
{
- if (state == RFKILL_STATE_SOFT_BLOCKED)
- return set_acpi(CM_ASL_BLUETOOTH, 0);
- else
- return set_acpi(CM_ASL_BLUETOOTH, 1);
+ unsigned long asl = (unsigned long)data;
+ return set_acpi(asl, !blocked);
}
-static int eeepc_bluetooth_rfkill_state(void *data, enum rfkill_state *state)
-{
- if (get_acpi(CM_ASL_BLUETOOTH) == 1)
- *state = RFKILL_STATE_UNBLOCKED;
- else
- *state = RFKILL_STATE_SOFT_BLOCKED;
- return 0;
-}
+static const struct rfkill_ops eeepc_rfkill_ops = {
+ .set_block = eeepc_rfkill_set,
+};
/*
* Sys helpers
@@ -531,9 +514,9 @@ static int notify_brn(void)
static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
{
- enum rfkill_state state;
struct pci_dev *dev;
struct pci_bus *bus = pci_find_bus(0, 1);
+ bool blocked;
if (event != ACPI_NOTIFY_BUS_CHECK)
return;
@@ -543,9 +526,8 @@ static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
return;
}
- eeepc_wlan_rfkill_state(ehotk->eeepc_wlan_rfkill, &state);
-
- if (state == RFKILL_STATE_UNBLOCKED) {
+ blocked = eeepc_wlan_rfkill_blocked();
+ if (!blocked) {
dev = pci_get_slot(bus, 0);
if (dev) {
/* Device already present */
@@ -566,7 +548,7 @@ static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
}
}
- rfkill_force_state(ehotk->eeepc_wlan_rfkill, state);
+ rfkill_set_sw_state(ehotk->eeepc_wlan_rfkill, blocked);
}
static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
@@ -684,26 +666,17 @@ static int eeepc_hotk_add(struct acpi_device *device)
eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
if (get_acpi(CM_ASL_WLAN) != -1) {
- ehotk->eeepc_wlan_rfkill = rfkill_allocate(&device->dev,
- RFKILL_TYPE_WLAN);
+ ehotk->eeepc_wlan_rfkill = rfkill_alloc("eeepc-wlan",
+ &device->dev,
+ RFKILL_TYPE_WLAN,
+ &eeepc_rfkill_ops,
+ (void *)CM_ASL_WLAN);
if (!ehotk->eeepc_wlan_rfkill)
goto wlan_fail;
- ehotk->eeepc_wlan_rfkill->name = "eeepc-wlan";
- ehotk->eeepc_wlan_rfkill->toggle_radio = eeepc_wlan_rfkill_set;
- ehotk->eeepc_wlan_rfkill->get_state = eeepc_wlan_rfkill_state;
- if (get_acpi(CM_ASL_WLAN) == 1) {
- ehotk->eeepc_wlan_rfkill->state =
- RFKILL_STATE_UNBLOCKED;
- rfkill_set_default(RFKILL_TYPE_WLAN,
- RFKILL_STATE_UNBLOCKED);
- } else {
- ehotk->eeepc_wlan_rfkill->state =
- RFKILL_STATE_SOFT_BLOCKED;
- rfkill_set_default(RFKILL_TYPE_WLAN,
- RFKILL_STATE_SOFT_BLOCKED);
- }
+ rfkill_set_global_sw_state(RFKILL_TYPE_WLAN,
+ get_acpi(CM_ASL_WLAN) != 1);
result = rfkill_register(ehotk->eeepc_wlan_rfkill);
if (result)
goto wlan_fail;
@@ -711,28 +684,17 @@ static int eeepc_hotk_add(struct acpi_device *device)
if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
ehotk->eeepc_bluetooth_rfkill =
- rfkill_allocate(&device->dev, RFKILL_TYPE_BLUETOOTH);
+ rfkill_alloc("eeepc-bluetooth",
+ &device->dev,
+ RFKILL_TYPE_BLUETOOTH,
+ &eeepc_rfkill_ops,
+ (void *)CM_ASL_BLUETOOTH);
if (!ehotk->eeepc_bluetooth_rfkill)
goto bluetooth_fail;
- ehotk->eeepc_bluetooth_rfkill->name = "eeepc-bluetooth";
- ehotk->eeepc_bluetooth_rfkill->toggle_radio =
- eeepc_bluetooth_rfkill_set;
- ehotk->eeepc_bluetooth_rfkill->get_state =
- eeepc_bluetooth_rfkill_state;
- if (get_acpi(CM_ASL_BLUETOOTH) == 1) {
- ehotk->eeepc_bluetooth_rfkill->state =
- RFKILL_STATE_UNBLOCKED;
- rfkill_set_default(RFKILL_TYPE_BLUETOOTH,
- RFKILL_STATE_UNBLOCKED);
- } else {
- ehotk->eeepc_bluetooth_rfkill->state =
- RFKILL_STATE_SOFT_BLOCKED;
- rfkill_set_default(RFKILL_TYPE_BLUETOOTH,
- RFKILL_STATE_SOFT_BLOCKED);
- }
-
+ rfkill_set_global_sw_state(RFKILL_TYPE_BLUETOOTH,
+ get_acpi(CM_ASL_BLUETOOTH) != 1);
result = rfkill_register(ehotk->eeepc_bluetooth_rfkill);
if (result)
goto bluetooth_fail;
@@ -741,13 +703,10 @@ static int eeepc_hotk_add(struct acpi_device *device)
return 0;
bluetooth_fail:
- if (ehotk->eeepc_bluetooth_rfkill)
- rfkill_free(ehotk->eeepc_bluetooth_rfkill);
+ rfkill_destroy(ehotk->eeepc_bluetooth_rfkill);
rfkill_unregister(ehotk->eeepc_wlan_rfkill);
- ehotk->eeepc_wlan_rfkill = NULL;
wlan_fail:
- if (ehotk->eeepc_wlan_rfkill)
- rfkill_free(ehotk->eeepc_wlan_rfkill);
+ rfkill_destroy(ehotk->eeepc_wlan_rfkill);
eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
ehotk_fail:
--
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