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>
diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index fe171fa..8d93114 100644
--- a/drivers/platform/x86/hp-wmi.c
+++ b/drivers/platform/x86/hp-wmi.c
@@ -154,58 +154,46 @@
return hp_wmi_perform_query(HPWMI_DOCK_QUERY, 0, 0);
}
-static int hp_wmi_wifi_set(void *data, enum rfkill_state state)
+static int hp_wmi_set_block(void *data, bool blocked)
{
- if (state)
- return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x101);
- else
- return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x100);
+ unsigned long b = (unsigned long) data;
+ int query = BIT(b + 8) | ((!!blocked) << b);
+
+ return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
}
-static int hp_wmi_bluetooth_set(void *data, enum rfkill_state state)
-{
- if (state)
- return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x202);
- else
- return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x200);
-}
+static const struct rfkill_ops hp_wmi_rfkill_ops = {
+ .set_block = hp_wmi_set_block,
+};
-static int hp_wmi_wwan_set(void *data, enum rfkill_state state)
-{
- if (state)
- return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x404);
- else
- return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x400);
-}
-
-static int hp_wmi_wifi_state(void)
+static bool hp_wmi_wifi_state(void)
{
int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
if (wireless & 0x100)
- return RFKILL_STATE_UNBLOCKED;
+ return false;
else
- return RFKILL_STATE_SOFT_BLOCKED;
+ return true;
}
-static int hp_wmi_bluetooth_state(void)
+static bool hp_wmi_bluetooth_state(void)
{
int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
if (wireless & 0x10000)
- return RFKILL_STATE_UNBLOCKED;
+ return false;
else
- return RFKILL_STATE_SOFT_BLOCKED;
+ return true;
}
-static int hp_wmi_wwan_state(void)
+static bool hp_wmi_wwan_state(void)
{
int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
if (wireless & 0x1000000)
- return RFKILL_STATE_UNBLOCKED;
+ return false;
else
- return RFKILL_STATE_SOFT_BLOCKED;
+ return true;
}
static ssize_t show_display(struct device *dev, struct device_attribute *attr,
@@ -347,14 +335,14 @@
}
} else if (eventcode == 0x5) {
if (wifi_rfkill)
- rfkill_force_state(wifi_rfkill,
- hp_wmi_wifi_state());
+ rfkill_set_sw_state(wifi_rfkill,
+ hp_wmi_wifi_state());
if (bluetooth_rfkill)
- rfkill_force_state(bluetooth_rfkill,
- hp_wmi_bluetooth_state());
+ rfkill_set_sw_state(bluetooth_rfkill,
+ hp_wmi_bluetooth_state());
if (wwan_rfkill)
- rfkill_force_state(wwan_rfkill,
- hp_wmi_wwan_state());
+ rfkill_set_sw_state(wwan_rfkill,
+ hp_wmi_wwan_state());
} else
printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
eventcode);
@@ -430,31 +418,34 @@
goto add_sysfs_error;
if (wireless & 0x1) {
- wifi_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WLAN);
- wifi_rfkill->name = "hp-wifi";
- wifi_rfkill->state = hp_wmi_wifi_state();
- wifi_rfkill->toggle_radio = hp_wmi_wifi_set;
+ wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
+ RFKILL_TYPE_WLAN,
+ &hp_wmi_rfkill_ops,
+ (void *) 0);
+ rfkill_set_sw_state(wifi_rfkill, hp_wmi_wifi_state());
err = rfkill_register(wifi_rfkill);
if (err)
- goto add_sysfs_error;
+ goto register_wifi_error;
}
if (wireless & 0x2) {
- bluetooth_rfkill = rfkill_allocate(&device->dev,
- RFKILL_TYPE_BLUETOOTH);
- bluetooth_rfkill->name = "hp-bluetooth";
- bluetooth_rfkill->state = hp_wmi_bluetooth_state();
- bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set;
+ bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
+ RFKILL_TYPE_BLUETOOTH,
+ &hp_wmi_rfkill_ops,
+ (void *) 1);
+ rfkill_set_sw_state(bluetooth_rfkill,
+ hp_wmi_bluetooth_state());
err = rfkill_register(bluetooth_rfkill);
if (err)
goto register_bluetooth_error;
}
if (wireless & 0x4) {
- wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WWAN);
- wwan_rfkill->name = "hp-wwan";
- wwan_rfkill->state = hp_wmi_wwan_state();
- wwan_rfkill->toggle_radio = hp_wmi_wwan_set;
+ wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
+ RFKILL_TYPE_WWAN,
+ &hp_wmi_rfkill_ops,
+ (void *) 2);
+ rfkill_set_sw_state(wwan_rfkill, hp_wmi_wwan_state());
err = rfkill_register(wwan_rfkill);
if (err)
goto register_wwan_err;
@@ -462,11 +453,15 @@
return 0;
register_wwan_err:
+ rfkill_destroy(wwan_rfkill);
if (bluetooth_rfkill)
rfkill_unregister(bluetooth_rfkill);
register_bluetooth_error:
+ rfkill_destroy(bluetooth_rfkill);
if (wifi_rfkill)
rfkill_unregister(wifi_rfkill);
+register_wifi_error:
+ rfkill_destroy(wifi_rfkill);
add_sysfs_error:
cleanup_sysfs(device);
return err;
@@ -476,12 +471,18 @@
{
cleanup_sysfs(device);
- if (wifi_rfkill)
+ if (wifi_rfkill) {
rfkill_unregister(wifi_rfkill);
- if (bluetooth_rfkill)
+ rfkill_destroy(wifi_rfkill);
+ }
+ if (bluetooth_rfkill) {
rfkill_unregister(bluetooth_rfkill);
- if (wwan_rfkill)
+ rfkill_destroy(wifi_rfkill);
+ }
+ if (wwan_rfkill) {
rfkill_unregister(wwan_rfkill);
+ rfkill_destroy(wwan_rfkill);
+ }
return 0;
}