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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 14:06:13 -0400
commit19d337dff95cbf76edd3ad95c0cee2732c3e1ec5 (patch)
tree33326eeb09cb9664cc8427a5dc7cd2b08b5a57c3 /drivers/net/wireless/b43legacy
parent0f6399c4c525b518644a9b09f8d6fb125a418c4d (diff)
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/net/wireless/b43legacy')
-rw-r--r--drivers/net/wireless/b43legacy/Kconfig2
-rw-r--r--drivers/net/wireless/b43legacy/leds.c3
-rw-r--r--drivers/net/wireless/b43legacy/rfkill.c123
-rw-r--r--drivers/net/wireless/b43legacy/rfkill.h6
4 files changed, 43 insertions, 91 deletions
diff --git a/drivers/net/wireless/b43legacy/Kconfig b/drivers/net/wireless/b43legacy/Kconfig
index d4f628a74bbd..6893f439df70 100644
--- a/drivers/net/wireless/b43legacy/Kconfig
+++ b/drivers/net/wireless/b43legacy/Kconfig
@@ -47,7 +47,7 @@ config B43LEGACY_LEDS
# if it's possible.
config B43LEGACY_RFKILL
bool
- depends on B43LEGACY && (RFKILL = y || RFKILL = B43LEGACY) && RFKILL_INPUT && (INPUT_POLLDEV = y || INPUT_POLLDEV = B43LEGACY)
+ depends on B43LEGACY && (RFKILL = y || RFKILL = B43LEGACY)
default y
# This config option automatically enables b43 HW-RNG support,
diff --git a/drivers/net/wireless/b43legacy/leds.c b/drivers/net/wireless/b43legacy/leds.c
index 3ea55b18c700..538d3117594b 100644
--- a/drivers/net/wireless/b43legacy/leds.c
+++ b/drivers/net/wireless/b43legacy/leds.c
@@ -86,7 +86,8 @@ static void b43legacy_led_brightness_set(struct led_classdev *led_dev,
static int b43legacy_register_led(struct b43legacy_wldev *dev,
struct b43legacy_led *led,
- const char *name, char *default_trigger,
+ const char *name,
+ const char *default_trigger,
u8 led_index, bool activelow)
{
int err;
diff --git a/drivers/net/wireless/b43legacy/rfkill.c b/drivers/net/wireless/b43legacy/rfkill.c
index 4b0c7d27a51f..c6230a64505a 100644
--- a/drivers/net/wireless/b43legacy/rfkill.c
+++ b/drivers/net/wireless/b43legacy/rfkill.c
@@ -45,12 +45,11 @@ static bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
}
/* The poll callback for the hardware button. */
-static void b43legacy_rfkill_poll(struct input_polled_dev *poll_dev)
+static void b43legacy_rfkill_poll(struct rfkill *rfkill, void *data)
{
- struct b43legacy_wldev *dev = poll_dev->private;
+ struct b43legacy_wldev *dev = data;
struct b43legacy_wl *wl = dev->wl;
bool enabled;
- bool report_change = 0;
mutex_lock(&wl->mutex);
if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {
@@ -60,71 +59,64 @@ static void b43legacy_rfkill_poll(struct input_polled_dev *poll_dev)
enabled = b43legacy_is_hw_radio_enabled(dev);
if (unlikely(enabled != dev->radio_hw_enable)) {
dev->radio_hw_enable = enabled;
- report_change = 1;
b43legacyinfo(wl, "Radio hardware status changed to %s\n",
enabled ? "ENABLED" : "DISABLED");
+ enabled = !rfkill_set_hw_state(rfkill, !enabled);
+ if (enabled != dev->phy.radio_on) {
+ if (enabled)
+ b43legacy_radio_turn_on(dev);
+ else
+ b43legacy_radio_turn_off(dev, 0);
+ }
}
mutex_unlock(&wl->mutex);
-
- /* send the radio switch event to the system - note both a key press
- * and a release are required */
- if (unlikely(report_change)) {
- input_report_key(poll_dev->input, KEY_WLAN, 1);
- input_report_key(poll_dev->input, KEY_WLAN, 0);
- }
}
/* Called when the RFKILL toggled in software.
* This is called without locking. */
-static int b43legacy_rfkill_soft_toggle(void *data, enum rfkill_state state)
+static int b43legacy_rfkill_soft_set(void *data, bool blocked)
{
struct b43legacy_wldev *dev = data;
struct b43legacy_wl *wl = dev->wl;
- int err = -EBUSY;
+ int ret = -EINVAL;
if (!wl->rfkill.registered)
- return 0;
+ return -EINVAL;
mutex_lock(&wl->mutex);
if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
goto out_unlock;
- err = 0;
- switch (state) {
- case RFKILL_STATE_UNBLOCKED:
- if (!dev->radio_hw_enable) {
- /* No luck. We can't toggle the hardware RF-kill
- * button from software. */
- err = -EBUSY;
- goto out_unlock;
- }
- if (!dev->phy.radio_on)
+
+ if (!dev->radio_hw_enable)
+ goto out_unlock;
+
+ if (!blocked != dev->phy.radio_on) {
+ if (!blocked)
b43legacy_radio_turn_on(dev);
- break;
- case RFKILL_STATE_SOFT_BLOCKED:
- if (dev->phy.radio_on)
+ else
b43legacy_radio_turn_off(dev, 0);
- break;
- default:
- b43legacywarn(wl, "Received unexpected rfkill state %d.\n",
- state);
- break;
}
+ ret = 0;
out_unlock:
mutex_unlock(&wl->mutex);
-
- return err;
+ return ret;
}
-char *b43legacy_rfkill_led_name(struct b43legacy_wldev *dev)
+const char *b43legacy_rfkill_led_name(struct b43legacy_wldev *dev)
{
struct b43legacy_rfkill *rfk = &(dev->wl->rfkill);
if (!rfk->registered)
return NULL;
- return rfkill_get_led_name(rfk->rfkill);
+ return rfkill_get_led_trigger_name(rfk->rfkill);
}
+static const struct rfkill_ops b43legacy_rfkill_ops = {
+ .set_block = b43legacy_rfkill_soft_set,
+ .poll = b43legacy_rfkill_poll,
+};
+
void b43legacy_rfkill_init(struct b43legacy_wldev *dev)
{
struct b43legacy_wl *wl = dev->wl;
@@ -133,60 +125,25 @@ void b43legacy_rfkill_init(struct b43legacy_wldev *dev)
rfk->registered = 0;
- rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
- if (!rfk->rfkill)
- goto out_error;
snprintf(rfk->name, sizeof(rfk->name),
"b43legacy-%s", wiphy_name(wl->hw->wiphy));
- rfk->rfkill->name = rfk->name;
- rfk->rfkill->state = RFKILL_STATE_UNBLOCKED;
- rfk->rfkill->data = dev;
- rfk->rfkill->toggle_radio = b43legacy_rfkill_soft_toggle;
-
- rfk->poll_dev = input_allocate_polled_device();
- if (!rfk->poll_dev) {
- rfkill_free(rfk->rfkill);
- goto err_freed_rfk;
- }
-
- rfk->poll_dev->private = dev;
- rfk->poll_dev->poll = b43legacy_rfkill_poll;
- rfk->poll_dev->poll_interval = 1000; /* msecs */
-
- rfk->poll_dev->input->name = rfk->name;
- rfk->poll_dev->input->id.bustype = BUS_HOST;
- rfk->poll_dev->input->id.vendor = dev->dev->bus->boardinfo.vendor;
- rfk->poll_dev->input->evbit[0] = BIT(EV_KEY);
- set_bit(KEY_WLAN, rfk->poll_dev->input->keybit);
+ rfk->rfkill = rfkill_alloc(rfk->name,
+ dev->dev->dev,
+ RFKILL_TYPE_WLAN,
+ &b43legacy_rfkill_ops, dev);
+ if (!rfk->rfkill)
+ goto out_error;
err = rfkill_register(rfk->rfkill);
if (err)
- goto err_free_polldev;
-
-#ifdef CONFIG_RFKILL_INPUT_MODULE
- /* B43legacy RF-kill isn't useful without the rfkill-input subsystem.
- * Try to load the module. */
- err = request_module("rfkill-input");
- if (err)
- b43legacywarn(wl, "Failed to load the rfkill-input module."
- "The built-in radio LED will not work.\n");
-#endif /* CONFIG_RFKILL_INPUT */
-
- err = input_register_polled_device(rfk->poll_dev);
- if (err)
- goto err_unreg_rfk;
+ goto err_free;
rfk->registered = 1;
return;
-err_unreg_rfk:
- rfkill_unregister(rfk->rfkill);
-err_free_polldev:
- input_free_polled_device(rfk->poll_dev);
- rfk->poll_dev = NULL;
-err_freed_rfk:
- rfk->rfkill = NULL;
-out_error:
+ err_free:
+ rfkill_destroy(rfk->rfkill);
+ out_error:
rfk->registered = 0;
b43legacywarn(wl, "RF-kill button init failed\n");
}
@@ -199,10 +156,8 @@ void b43legacy_rfkill_exit(struct b43legacy_wldev *dev)
return;
rfk->registered = 0;
- input_unregister_polled_device(rfk->poll_dev);
rfkill_unregister(rfk->rfkill);
- input_free_polled_device(rfk->poll_dev);
- rfk->poll_dev = NULL;
+ rfkill_destroy(rfk->rfkill);
rfk->rfkill = NULL;
}
diff --git a/drivers/net/wireless/b43legacy/rfkill.h b/drivers/net/wireless/b43legacy/rfkill.h
index 11150a8032f0..adffc503a6a1 100644
--- a/drivers/net/wireless/b43legacy/rfkill.h
+++ b/drivers/net/wireless/b43legacy/rfkill.h
@@ -6,16 +6,12 @@ struct b43legacy_wldev;
#ifdef CONFIG_B43LEGACY_RFKILL
#include <linux/rfkill.h>
-#include <linux/workqueue.h>
-#include <linux/input-polldev.h>
struct b43legacy_rfkill {
/* The RFKILL subsystem data structure */
struct rfkill *rfkill;
- /* The poll device for the RFKILL input button */
- struct input_polled_dev *poll_dev;
/* Did initialization succeed? Used for freeing. */
bool registered;
/* The unique name of this rfkill switch */
@@ -27,7 +23,7 @@ struct b43legacy_rfkill {
void b43legacy_rfkill_init(struct b43legacy_wldev *dev);
void b43legacy_rfkill_exit(struct b43legacy_wldev *dev);
-char *b43legacy_rfkill_led_name(struct b43legacy_wldev *dev);
+const char *b43legacy_rfkill_led_name(struct b43legacy_wldev *dev);
#else /* CONFIG_B43LEGACY_RFKILL */