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authorJohannes Berg <johannes@sipsolutions.net>2009-06-02 13:01:37 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-06-03 20:06:13 +0200
commit19d337dff95cbf76edd3ad95c0cee2732c3e1ec5 (patch)
tree33326eeb09cb9664cc8427a5dc7cd2b08b5a57c3 /drivers/platform/x86/hp-wmi.c
parentnl80211: use GFP_ATOMIC for michael mic failure message (diff)
downloadlinux-19d337dff95cbf76edd3ad95c0cee2732c3e1ec5.tar.xz
linux-19d337dff95cbf76edd3ad95c0cee2732c3e1ec5.zip
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>
Diffstat (limited to 'drivers/platform/x86/hp-wmi.c')
-rw-r--r--drivers/platform/x86/hp-wmi.c103
1 files changed, 52 insertions, 51 deletions
diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index fe171fad12cf..8d931145cbfa 100644
--- a/drivers/platform/x86/hp-wmi.c
+++ b/drivers/platform/x86/hp-wmi.c
@@ -154,58 +154,46 @@ static int hp_wmi_dock_state(void)
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);
-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);
+ return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
}
-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 const struct rfkill_ops hp_wmi_rfkill_ops = {
+ .set_block = hp_wmi_set_block,
+};
-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 @@ static void hp_wmi_notify(u32 value, void *context)
}
} 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 @@ static int __init hp_wmi_bios_setup(struct platform_device *device)
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 @@ static int __init hp_wmi_bios_setup(struct platform_device *device)
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 @@ static int __exit hp_wmi_bios_remove(struct platform_device *device)
{
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;
}