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/net/wireless/b43/Kconfig b/drivers/net/wireless/b43/Kconfig
index 21572e4..07a99e3 100644
--- a/drivers/net/wireless/b43/Kconfig
+++ b/drivers/net/wireless/b43/Kconfig
@@ -102,7 +102,7 @@
# if it's possible.
config B43_RFKILL
bool
- depends on B43 && (RFKILL = y || RFKILL = B43) && RFKILL_INPUT && (INPUT_POLLDEV = y || INPUT_POLLDEV = B43)
+ depends on B43 && (RFKILL = y || RFKILL = B43)
default y
# This config option automatically enables b43 HW-RNG support,
diff --git a/drivers/net/wireless/b43/leds.c b/drivers/net/wireless/b43/leds.c
index 76f4c7b..9a498d3 100644
--- a/drivers/net/wireless/b43/leds.c
+++ b/drivers/net/wireless/b43/leds.c
@@ -87,7 +87,7 @@
}
static int b43_register_led(struct b43_wldev *dev, struct b43_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/b43/main.c b/drivers/net/wireless/b43/main.c
index cb4a871..1d3e400 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -3470,7 +3470,7 @@
if (!!conf->radio_enabled != phy->radio_on) {
if (conf->radio_enabled) {
- b43_software_rfkill(dev, RFKILL_STATE_UNBLOCKED);
+ b43_software_rfkill(dev, false);
b43info(dev->wl, "Radio turned on by software\n");
if (!dev->radio_hw_enable) {
b43info(dev->wl, "The hardware RF-kill button "
@@ -3478,7 +3478,7 @@
"Press the button to turn it on.\n");
}
} else {
- b43_software_rfkill(dev, RFKILL_STATE_SOFT_BLOCKED);
+ b43_software_rfkill(dev, true);
b43info(dev->wl, "Radio turned off by software\n");
}
}
diff --git a/drivers/net/wireless/b43/phy_a.c b/drivers/net/wireless/b43/phy_a.c
index c836c07..816e028 100644
--- a/drivers/net/wireless/b43/phy_a.c
+++ b/drivers/net/wireless/b43/phy_a.c
@@ -480,11 +480,11 @@
}
static void b43_aphy_op_software_rfkill(struct b43_wldev *dev,
- enum rfkill_state state)
+ bool blocked)
{
struct b43_phy *phy = &dev->phy;
- if (state == RFKILL_STATE_UNBLOCKED) {
+ if (!blocked) {
if (phy->radio_on)
return;
b43_radio_write16(dev, 0x0004, 0x00C0);
diff --git a/drivers/net/wireless/b43/phy_common.c b/drivers/net/wireless/b43/phy_common.c
index e176b6e..6d24162 100644
--- a/drivers/net/wireless/b43/phy_common.c
+++ b/drivers/net/wireless/b43/phy_common.c
@@ -84,7 +84,7 @@
phy->channel = ops->get_default_chan(dev);
- ops->software_rfkill(dev, RFKILL_STATE_UNBLOCKED);
+ ops->software_rfkill(dev, false);
err = ops->init(dev);
if (err) {
b43err(dev->wl, "PHY init failed\n");
@@ -104,7 +104,7 @@
if (ops->exit)
ops->exit(dev);
err_block_rf:
- ops->software_rfkill(dev, RFKILL_STATE_SOFT_BLOCKED);
+ ops->software_rfkill(dev, true);
return err;
}
@@ -113,7 +113,7 @@
{
const struct b43_phy_operations *ops = dev->phy.ops;
- ops->software_rfkill(dev, RFKILL_STATE_SOFT_BLOCKED);
+ ops->software_rfkill(dev, true);
if (ops->exit)
ops->exit(dev);
}
@@ -295,18 +295,13 @@
return err;
}
-void b43_software_rfkill(struct b43_wldev *dev, enum rfkill_state state)
+void b43_software_rfkill(struct b43_wldev *dev, bool blocked)
{
struct b43_phy *phy = &dev->phy;
- if (state == RFKILL_STATE_HARD_BLOCKED) {
- /* We cannot hardware-block the device */
- state = RFKILL_STATE_SOFT_BLOCKED;
- }
-
b43_mac_suspend(dev);
- phy->ops->software_rfkill(dev, state);
- phy->radio_on = (state == RFKILL_STATE_UNBLOCKED);
+ phy->ops->software_rfkill(dev, blocked);
+ phy->radio_on = !blocked;
b43_mac_enable(dev);
}
diff --git a/drivers/net/wireless/b43/phy_common.h b/drivers/net/wireless/b43/phy_common.h
index b2d9910..f4c2d79 100644
--- a/drivers/net/wireless/b43/phy_common.h
+++ b/drivers/net/wireless/b43/phy_common.h
@@ -159,7 +159,7 @@
/* Radio */
bool (*supports_hwpctl)(struct b43_wldev *dev);
- void (*software_rfkill)(struct b43_wldev *dev, enum rfkill_state state);
+ void (*software_rfkill)(struct b43_wldev *dev, bool blocked);
void (*switch_analog)(struct b43_wldev *dev, bool on);
int (*switch_channel)(struct b43_wldev *dev, unsigned int new_channel);
unsigned int (*get_default_chan)(struct b43_wldev *dev);
@@ -364,7 +364,7 @@
/**
* b43_software_rfkill - Turn the radio ON or OFF in software.
*/
-void b43_software_rfkill(struct b43_wldev *dev, enum rfkill_state state);
+void b43_software_rfkill(struct b43_wldev *dev, bool blocked);
/**
* b43_phy_txpower_check - Check TX power output.
diff --git a/drivers/net/wireless/b43/phy_g.c b/drivers/net/wireless/b43/phy_g.c
index e7b98f0..5300232 100644
--- a/drivers/net/wireless/b43/phy_g.c
+++ b/drivers/net/wireless/b43/phy_g.c
@@ -2592,7 +2592,7 @@
}
static void b43_gphy_op_software_rfkill(struct b43_wldev *dev,
- enum rfkill_state state)
+ bool blocked)
{
struct b43_phy *phy = &dev->phy;
struct b43_phy_g *gphy = phy->g;
@@ -2600,7 +2600,7 @@
might_sleep();
- if (state == RFKILL_STATE_UNBLOCKED) {
+ if (!blocked) {
/* Turn radio ON */
if (phy->radio_on)
return;
diff --git a/drivers/net/wireless/b43/phy_lp.c b/drivers/net/wireless/b43/phy_lp.c
index 58e319d..ea0d3a3 100644
--- a/drivers/net/wireless/b43/phy_lp.c
+++ b/drivers/net/wireless/b43/phy_lp.c
@@ -488,7 +488,7 @@
}
static void b43_lpphy_op_software_rfkill(struct b43_wldev *dev,
- enum rfkill_state state)
+ bool blocked)
{
//TODO
}
diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 8bcfda5..be7b560 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -579,7 +579,7 @@
}
static void b43_nphy_op_software_rfkill(struct b43_wldev *dev,
- enum rfkill_state state)
+ bool blocked)
{//TODO
}
diff --git a/drivers/net/wireless/b43/rfkill.c b/drivers/net/wireless/b43/rfkill.c
index 9e1d00b..9604784 100644
--- a/drivers/net/wireless/b43/rfkill.c
+++ b/drivers/net/wireless/b43/rfkill.c
@@ -45,12 +45,11 @@
}
/* The poll callback for the hardware button. */
-static void b43_rfkill_poll(struct input_polled_dev *poll_dev)
+static void b43_rfkill_poll(struct rfkill *rfkill, void *data)
{
- struct b43_wldev *dev = poll_dev->private;
+ struct b43_wldev *dev = data;
struct b43_wl *wl = dev->wl;
bool enabled;
- bool report_change = 0;
mutex_lock(&wl->mutex);
if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) {
@@ -60,68 +59,55 @@
enabled = b43_is_hw_radio_enabled(dev);
if (unlikely(enabled != dev->radio_hw_enable)) {
dev->radio_hw_enable = enabled;
- report_change = 1;
b43info(wl, "Radio hardware status changed to %s\n",
enabled ? "ENABLED" : "DISABLED");
+ enabled = !rfkill_set_hw_state(rfkill, !enabled);
+ if (enabled != dev->phy.radio_on)
+ b43_software_rfkill(dev, !enabled);
}
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. */
-static int b43_rfkill_soft_toggle(void *data, enum rfkill_state state)
+static int b43_rfkill_soft_set(void *data, bool blocked)
{
struct b43_wldev *dev = data;
struct b43_wl *wl = dev->wl;
- int err = -EBUSY;
+ int err = -EINVAL;
- if (!wl->rfkill.registered)
- return 0;
+ if (WARN_ON(!wl->rfkill.registered))
+ return -EINVAL;
mutex_lock(&wl->mutex);
+
if (b43_status(dev) < B43_STAT_INITIALIZED)
goto out_unlock;
+
+ if (!dev->radio_hw_enable)
+ goto out_unlock;
+
+ if (!blocked != dev->phy.radio_on)
+ b43_software_rfkill(dev, blocked);
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)
- b43_software_rfkill(dev, state);
- break;
- case RFKILL_STATE_SOFT_BLOCKED:
- if (dev->phy.radio_on)
- b43_software_rfkill(dev, state);
- break;
- default:
- b43warn(wl, "Received unexpected rfkill state %d.\n", state);
- break;
- }
out_unlock:
mutex_unlock(&wl->mutex);
-
return err;
}
-char *b43_rfkill_led_name(struct b43_wldev *dev)
+const char *b43_rfkill_led_name(struct b43_wldev *dev)
{
struct b43_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 b43_rfkill_ops = {
+ .set_block = b43_rfkill_soft_set,
+ .poll = b43_rfkill_poll,
+};
+
void b43_rfkill_init(struct b43_wldev *dev)
{
struct b43_wl *wl = dev->wl;
@@ -130,65 +116,26 @@
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),
"b43-%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 = b43_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 = b43_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,
+ &b43_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
- /* B43 RF-kill isn't useful without the rfkill-input subsystem.
- * Try to load the module. */
- err = request_module("rfkill-input");
- if (err)
- b43warn(wl, "Failed to load the rfkill-input module. "
- "The built-in radio LED will not work.\n");
-#endif /* CONFIG_RFKILL_INPUT */
-
-#if !defined(CONFIG_RFKILL_INPUT) && !defined(CONFIG_RFKILL_INPUT_MODULE)
- b43warn(wl, "The rfkill-input subsystem is not available. "
- "The built-in radio LED will not work.\n");
-#endif
-
- 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;
b43warn(wl, "RF-kill button init failed\n");
}
@@ -201,9 +148,7 @@
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/b43/rfkill.h b/drivers/net/wireless/b43/rfkill.h
index adacf93..da497e0 100644
--- a/drivers/net/wireless/b43/rfkill.h
+++ b/drivers/net/wireless/b43/rfkill.h
@@ -7,14 +7,11 @@
#ifdef CONFIG_B43_RFKILL
#include <linux/rfkill.h>
-#include <linux/input-polldev.h>
struct b43_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 */
@@ -26,7 +23,7 @@
void b43_rfkill_init(struct b43_wldev *dev);
void b43_rfkill_exit(struct b43_wldev *dev);
-char * b43_rfkill_led_name(struct b43_wldev *dev);
+const char *b43_rfkill_led_name(struct b43_wldev *dev);
#else /* CONFIG_B43_RFKILL */