[B43]: LED triggers support

Drive the LEDs through the generic LED triggers.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: Larry Finger <larry.finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 164 insertions, 231 deletions

diff --git a/drivers/net/wireless/b43/leds.c b/drivers/net/wireless/b43/leds.c
index 0f155b4f34eb..ddab856f1140 100644
--- a/drivers/net/wireless/b43/leds.c
+++ b/drivers/net/wireless/b43/leds.c
@@ -1,12 +1,13 @@
 /*
 
   Broadcom B43 wireless driver
+  LED control
 
   Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
-                     Stefano Brivio <st3@riseup.net>
-                     Michael Buesch <mb@bu3sch.de>
-                     Danny van Dyk <kugelfang@gentoo.org>
-                     Andreas Jaggi <andreas.jaggi@waterwave.ch>
+  Copyright (c) 2005 Stefano Brivio <st3@riseup.net>
+  Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>
+  Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
+  Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -27,272 +28,204 @@
 
 #include "b43.h"
 #include "leds.h"
-#include "main.h"
 
-static void b43_led_changestate(struct b43_led *led)
-{
-        struct b43_wldev *dev = led->dev;
-        const int index = led->index;
-        u16 ledctl;
-
-        B43_WARN_ON(!(index >= 0 && index < B43_NR_LEDS));
-        B43_WARN_ON(!led->blink_interval);
-        ledctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
-        ledctl ^= (1 << index);
-        b43_write16(dev, B43_MMIO_GPIO_CONTROL, ledctl);
-}
 
-static void b43_led_blink(unsigned long d)
+static void b43_led_turn_on(struct b43_wldev *dev, u8 led_index,
+                            bool activelow)
 {
-        struct b43_led *led = (struct b43_led *)d;
-        struct b43_wldev *dev = led->dev;
+        struct b43_wl *wl = dev->wl;
         unsigned long flags;
+        u16 ctl;
 
-        spin_lock_irqsave(&dev->wl->leds_lock, flags);
-        if (led->blink_interval) {
-                b43_led_changestate(led);
-                mod_timer(&led->blink_timer, jiffies + led->blink_interval);
-        }
-        spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
+        spin_lock_irqsave(&wl->leds_lock, flags);
+        ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
+        if (activelow)
+                ctl &= ~(1 << led_index);
+        else
+                ctl |= (1 << led_index);
+        b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
+        spin_unlock_irqrestore(&wl->leds_lock, flags);
 }
 
-static void b43_led_blink_start(struct b43_led *led, unsigned long interval)
+static void b43_led_turn_off(struct b43_wldev *dev, u8 led_index,
+                             bool activelow)
 {
-        if (led->blink_interval)
-                return;
-        led->blink_interval = interval;
-        b43_led_changestate(led);
-        led->blink_timer.expires = jiffies + interval;
-        add_timer(&led->blink_timer);
+        struct b43_wl *wl = dev->wl;
+        unsigned long flags;
+        u16 ctl;
+
+        spin_lock_irqsave(&wl->leds_lock, flags);
+        ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
+        if (activelow)
+                ctl |= (1 << led_index);
+        else
+                ctl &= ~(1 << led_index);
+        b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
+        spin_unlock_irqrestore(&wl->leds_lock, flags);
 }
 
-static void b43_led_blink_stop(struct b43_led *led, int sync)
+/* Callback from the LED subsystem. */
+static void b43_led_brightness_set(struct led_classdev *led_dev,
+                                   enum led_brightness brightness)
 {
+        struct b43_led *led = container_of(led_dev, struct b43_led, led_dev);
         struct b43_wldev *dev = led->dev;
-        const int index = led->index;
-        u16 ledctl;
+        bool radio_enabled;
 
-        if (!led->blink_interval)
-                return;
-        if (unlikely(sync))
-                del_timer_sync(&led->blink_timer);
-        else
-                del_timer(&led->blink_timer);
-        led->blink_interval = 0;
+        /* Checking the radio-enabled status here is slightly racy,
+         * but we want to avoid the locking overhead and we don't care
+         * whether the LED has the wrong state for a second. */
+        radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
 
-        /* Make sure the LED is turned off. */
-        B43_WARN_ON(!(index >= 0 && index < B43_NR_LEDS));
-        ledctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
-        if (led->activelow)
-                ledctl |= (1 << index);
+        if (brightness == LED_OFF || !radio_enabled)
+                b43_led_turn_off(dev, led->index, led->activelow);
         else
-                ledctl &= ~(1 << index);
-        b43_write16(dev, B43_MMIO_GPIO_CONTROL, ledctl);
+                b43_led_turn_on(dev, led->index, led->activelow);
 }
 
-static void b43_led_init_hardcoded(struct b43_wldev *dev,
-                                   struct b43_led *led, int led_index)
+static int b43_register_led(struct b43_wldev *dev, struct b43_led *led,
+                            const char *name, char *default_trigger,
+                            u8 led_index, bool activelow)
 {
-        struct ssb_bus *bus = dev->dev->bus;
+        int err;
+
+        b43_led_turn_off(dev, led_index, activelow);
+        if (led->dev)
+                return -EEXIST;
+        if (!default_trigger)
+                return -EINVAL;
+        led->dev = dev;
+        led->index = led_index;
+        led->activelow = activelow;
+        strncpy(led->name, name, sizeof(led->name));
+
+        led->led_dev.name = led->name;
+        led->led_dev.default_trigger = default_trigger;
+        led->led_dev.brightness_set = b43_led_brightness_set;
+
+        err = led_classdev_register(dev->dev->dev, &led->led_dev);
+        if (err) {
+                b43warn(dev->wl, "LEDs: Failed to register %s\n", name);
+                led->dev = NULL;
+                return err;
+        }
+        return 0;
+}
+
+static void b43_unregister_led(struct b43_led *led)
+{
+        if (!led->dev)
+                return;
+        led_classdev_unregister(&led->led_dev);
+        b43_led_turn_off(led->dev, led->index, led->activelow);
+        led->dev = NULL;
+}
 
-        /* This function is called, if the behaviour (and activelow)
-         * information for a LED is missing in the SPROM.
-         * We hardcode the behaviour values for various devices here.
-         * Note that the B43_LED_TEST_XXX behaviour values can
-         * be used to figure out which led is mapped to which index.
-         */
+static void b43_map_led(struct b43_wldev *dev,
+                        u8 led_index,
+                        enum b43_led_behaviour behaviour,
+                        bool activelow)
+{
+        struct ieee80211_hw *hw = dev->wl->hw;
+        char name[B43_LED_MAX_NAME_LEN + 1];
 
-        switch (led_index) {
-        case 0:
-                led->behaviour = B43_LED_ACTIVITY;
-                led->activelow = 1;
-                if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
-                        led->behaviour = B43_LED_RADIO_ALL;
+        /* Map the b43 specific LED behaviour value to the
+         * generic LED triggers. */
+        switch (behaviour) {
+        case B43_LED_INACTIVE:
+                break;
+        case B43_LED_OFF:
+                b43_led_turn_off(dev, led_index, activelow);
                 break;
-        case 1:
-                led->behaviour = B43_LED_RADIO_B;
-                if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
-                        led->behaviour = B43_LED_ASSOC;
+        case B43_LED_ON:
+                b43_led_turn_on(dev, led_index, activelow);
                 break;
-        case 2:
-                led->behaviour = B43_LED_RADIO_A;
+        case B43_LED_ACTIVITY:
+        case B43_LED_TRANSFER:
+        case B43_LED_APTRANSFER:
+                snprintf(name, sizeof(name),
+                         "b43-%s:tx", wiphy_name(hw->wiphy));
+                b43_register_led(dev, &dev->led_tx, name,
+                                 ieee80211_get_tx_led_name(hw),
+                                 led_index, activelow);
+                snprintf(name, sizeof(name),
+                         "b43-%s:rx", wiphy_name(hw->wiphy));
+                b43_register_led(dev, &dev->led_rx, name,
+                                 ieee80211_get_rx_led_name(hw),
+                                 led_index, activelow);
                 break;
-        case 3:
-                led->behaviour = B43_LED_OFF;
+        /*FIXME: We need another trigger for the "radio-on" LEDs below.
+         *       Wiggle that somehow into the rfkill subsystem. */
+        case B43_LED_RADIO_ALL:
+        case B43_LED_RADIO_A:
+        case B43_LED_RADIO_B:
+        case B43_LED_MODE_BG:
+        case B43_LED_WEIRD:
+        case B43_LED_ASSOC:
+                snprintf(name, sizeof(name),
+                         "b43-%s:assoc", wiphy_name(hw->wiphy));
+                b43_register_led(dev, &dev->led_assoc, name,
+                                 ieee80211_get_assoc_led_name(hw),
+                                 led_index, activelow);
                 break;
         default:
-                B43_WARN_ON(1);
+                b43warn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
+                        behaviour);
+                break;
         }
 }
 
-int b43_leds_init(struct b43_wldev *dev)
+void b43_leds_init(struct b43_wldev *dev)
 {
-        struct b43_led *led;
+        struct ssb_bus *bus = dev->dev->bus;
         u8 sprom[4];
         int i;
+        enum b43_led_behaviour behaviour;
+        bool activelow;
 
-        sprom[0] = dev->dev->bus->sprom.r1.gpio0;
-        sprom[1] = dev->dev->bus->sprom.r1.gpio1;
-        sprom[2] = dev->dev->bus->sprom.r1.gpio2;
-        sprom[3] = dev->dev->bus->sprom.r1.gpio3;
-
-        for (i = 0; i < B43_NR_LEDS; i++) {
-                led = &(dev->leds[i]);
-                led->index = i;
-                led->dev = dev;
-                setup_timer(&led->blink_timer,
-                            b43_led_blink, (unsigned long)led);
+        sprom[0] = bus->sprom.r1.gpio0;
+        sprom[1] = bus->sprom.r1.gpio1;
+        sprom[2] = bus->sprom.r1.gpio2;
+        sprom[3] = bus->sprom.r1.gpio3;
 
+        for (i = 0; i < 4; i++) {
                 if (sprom[i] == 0xFF) {
-                        b43_led_init_hardcoded(dev, led, i);
+                        /* There is no LED information in the SPROM
+                         * for this LED. Hardcode it here. */
+                        activelow = 0;
+                        switch (i) {
+                        case 0:
+                                behaviour = B43_LED_ACTIVITY;
+                                activelow = 1;
+                                if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
+                                        behaviour = B43_LED_RADIO_ALL;
+                                break;
+                        case 1:
+                                behaviour = B43_LED_RADIO_B;
+                                if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
+                                        behaviour = B43_LED_ASSOC;
+                                break;
+                        case 2:
+                                behaviour = B43_LED_RADIO_A;
+                                break;
+                        case 3:
+                                behaviour = B43_LED_OFF;
+                                break;
+                        default:
+                                B43_WARN_ON(1);
+                                return;
+                        }
                 } else {
-                        led->behaviour = sprom[i] & B43_LED_BEHAVIOUR;
-                        led->activelow = !!(sprom[i] & B43_LED_ACTIVELOW);
+                        behaviour = sprom[i] & B43_LED_BEHAVIOUR;
+                        activelow = !!(sprom[i] & B43_LED_ACTIVELOW);
                 }
+                b43_map_led(dev, i, behaviour, activelow);
         }
-
-        return 0;
 }
 
 void b43_leds_exit(struct b43_wldev *dev)
 {
-        struct b43_led *led;
-        int i;
-
-        for (i = 0; i < B43_NR_LEDS; i++) {
-                led = &(dev->leds[i]);
-                b43_led_blink_stop(led, 1);
-        }
-        b43_leds_switch_all(dev, 0);
-}
-
-void b43_leds_update(struct b43_wldev *dev, int activity)
-{
-        struct b43_led *led;
-        struct b43_phy *phy = &dev->phy;
-        const int transferring =
-            (jiffies - dev->stats.last_tx) < B43_LED_XFER_THRES;
-        int i, turn_on;
-        unsigned long interval = 0;
-        u16 ledctl;
-        unsigned long flags;
-        bool radio_enabled = (phy->radio_on && dev->radio_hw_enable);
-
-        spin_lock_irqsave(&dev->wl->leds_lock, flags);
-        ledctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
-        for (i = 0; i < B43_NR_LEDS; i++) {
-                led = &(dev->leds[i]);
-
-                turn_on = 0;
-                switch (led->behaviour) {
-                case B43_LED_INACTIVE:
-                        continue;
-                case B43_LED_OFF:
-                        break;
-                case B43_LED_ON:
-                        turn_on = 1;
-                        break;
-                case B43_LED_ACTIVITY:
-                        turn_on = activity;
-                        break;
-                case B43_LED_RADIO_ALL:
-                        turn_on = radio_enabled;
-                        break;
-                case B43_LED_RADIO_A:
-                        turn_on = (radio_enabled && phy->type == B43_PHYTYPE_A);
-                        break;
-                case B43_LED_RADIO_B:
-                        turn_on = (radio_enabled &&
-                                   (phy->type == B43_PHYTYPE_B
-                                    || phy->type == B43_PHYTYPE_G));
-                        break;
-                case B43_LED_MODE_BG:
-                        if (phy->type == B43_PHYTYPE_G
-                            && radio_enabled)
-                                turn_on = 1;
-                        break;
-                case B43_LED_TRANSFER:
-                        if (transferring)
-                                b43_led_blink_start(led, B43_LEDBLINK_MEDIUM);
-                        else
-                                b43_led_blink_stop(led, 0);
-                        continue;
-                case B43_LED_APTRANSFER:
-                        if (b43_is_mode(dev->wl, IEEE80211_IF_TYPE_AP)) {
-                                if (transferring) {
-                                        interval = B43_LEDBLINK_FAST;
-                                        turn_on = 1;
-                                }
-                        } else {
-                                turn_on = 1;
-                                if (0 /*TODO: not assoc */ )
-                                        interval = B43_LEDBLINK_SLOW;
-                                else if (transferring)
-                                        interval = B43_LEDBLINK_FAST;
-                                else
-                                        turn_on = 0;
-                        }
-                        if (turn_on)
-                                b43_led_blink_start(led, interval);
-                        else
-                                b43_led_blink_stop(led, 0);
-                        continue;
-                case B43_LED_WEIRD:
-                        //TODO
-                        break;
-                case B43_LED_ASSOC:
-                        if (1 /*dev->softmac->associated */ )
-                                turn_on = 1;
-                        break;
-#ifdef CONFIG_B43_DEBUG
-                case B43_LED_TEST_BLINKSLOW:
-                        b43_led_blink_start(led, B43_LEDBLINK_SLOW);
-                        continue;
-                case B43_LED_TEST_BLINKMEDIUM:
-                        b43_led_blink_start(led, B43_LEDBLINK_MEDIUM);
-                        continue;
-                case B43_LED_TEST_BLINKFAST:
-                        b43_led_blink_start(led, B43_LEDBLINK_FAST);
-                        continue;
-#endif /* CONFIG_B43_DEBUG */
-                default:
-                        B43_WARN_ON(1);
-                };
-
-                if (led->activelow)
-                        turn_on = !turn_on;
-                if (turn_on)
-                        ledctl |= (1 << i);
-                else
-                        ledctl &= ~(1 << i);
-        }
-        b43_write16(dev, B43_MMIO_GPIO_CONTROL, ledctl);
-        spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
-}
-
-void b43_leds_switch_all(struct b43_wldev *dev, int on)
-{
-        struct b43_led *led;
-        u16 ledctl;
-        int i;
-        int bit_on;
-        unsigned long flags;
-
-        spin_lock_irqsave(&dev->wl->leds_lock, flags);
-        ledctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
-        for (i = 0; i < B43_NR_LEDS; i++) {
-                led = &(dev->leds[i]);
-                if (led->behaviour == B43_LED_INACTIVE)
-                        continue;
-                if (on)
-                        bit_on = led->activelow ? 0 : 1;
-                else
-                        bit_on = led->activelow ? 1 : 0;
-                if (bit_on)
-                        ledctl |= (1 << i);
-                else
-                        ledctl &= ~(1 << i);
-        }
-        b43_write16(dev, B43_MMIO_GPIO_CONTROL, ledctl);
-        spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
+        b43_unregister_led(&dev->led_tx);
+        b43_unregister_led(&dev->led_rx);
+        b43_unregister_led(&dev->led_assoc);
 }