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linux-next/drivers/net/wireless/b43legacy/leds.c
Larry Finger 1065de1562 [B43LEGACY]: Change the hardware radio enable logic and cleanup code 
This change cleans up the radio-related messages in several ways.

(1) The state of the rfkill switch is assumed to be on, rather than
    tested. Now, any user without such a switch will not see any
    messages. For devices with such a switch, a message will be
    logged only if the initial state is off, or if the switch is toggled.
(2) The routine for testing the switch state is no longer inline.
(3) The LED handling routine is simplified.
(4) The "Radio turned off" message that has confused some users has been
    changed to "Radio initialized".

This patch is patterned after a similar change to b43 by Michael Buesch.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:52:25 -07:00

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/*
Broadcom B43legacy wireless driver
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) 2007 Larry Finger <Larry.Finger@lwfinger.net>
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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "leds.h"
#include "b43legacy.h"
#include "main.h"
static void b43legacy_led_changestate(struct b43legacy_led *led)
{
struct b43legacy_wldev *dev = led->dev;
const int index = led->index;
u16 ledctl;
B43legacy_WARN_ON(!(index >= 0 && index < B43legacy_NR_LEDS));
B43legacy_WARN_ON(!led->blink_interval);
ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
ledctl ^= (1 << index);
b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
}
static void b43legacy_led_blink(unsigned long d)
{
struct b43legacy_led *led = (struct b43legacy_led *)d;
struct b43legacy_wldev *dev = led->dev;
unsigned long flags;
spin_lock_irqsave(&dev->wl->leds_lock, flags);
if (led->blink_interval) {
b43legacy_led_changestate(led);
mod_timer(&led->blink_timer, jiffies + led->blink_interval);
}
spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
}
static void b43legacy_led_blink_start(struct b43legacy_led *led,
unsigned long interval)
{
if (led->blink_interval)
return;
led->blink_interval = interval;
b43legacy_led_changestate(led);
led->blink_timer.expires = jiffies + interval;
add_timer(&led->blink_timer);
}
static void b43legacy_led_blink_stop(struct b43legacy_led *led, int sync)
{
struct b43legacy_wldev *dev = led->dev;
const int index = led->index;
u16 ledctl;
if (!led->blink_interval)
return;
if (unlikely(sync))
del_timer_sync(&led->blink_timer);
else
del_timer(&led->blink_timer);
led->blink_interval = 0;
/* Make sure the LED is turned off. */
B43legacy_WARN_ON(!(index >= 0 && index < B43legacy_NR_LEDS));
ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
if (led->activelow)
ledctl |= (1 << index);
else
ledctl &= ~(1 << index);
b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
}
static void b43legacy_led_init_hardcoded(struct b43legacy_wldev *dev,
struct b43legacy_led *led,
int led_index)
{
struct ssb_bus *bus = dev->dev->bus;
/* 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 B43legacy_LED_TEST_XXX behaviour values can
* be used to figure out which led is mapped to which index.
*/
switch (led_index) {
case 0:
led->behaviour = B43legacy_LED_ACTIVITY;
led->activelow = 1;
if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
led->behaviour = B43legacy_LED_RADIO_ALL;
break;
case 1:
led->behaviour = B43legacy_LED_RADIO_B;
if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
led->behaviour = B43legacy_LED_ASSOC;
break;
case 2:
led->behaviour = B43legacy_LED_RADIO_A;
break;
case 3:
led->behaviour = B43legacy_LED_OFF;
break;
default:
B43legacy_BUG_ON(1);
}
}
int b43legacy_leds_init(struct b43legacy_wldev *dev)
{
struct b43legacy_led *led;
u8 sprom[4];
int i;
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 < B43legacy_NR_LEDS; i++) {
led = &(dev->leds[i]);
led->index = i;
led->dev = dev;
setup_timer(&led->blink_timer,
b43legacy_led_blink,
(unsigned long)led);
if (sprom[i] == 0xFF)
b43legacy_led_init_hardcoded(dev, led, i);
else {
led->behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
led->activelow = !!(sprom[i] &
B43legacy_LED_ACTIVELOW);
}
}
return 0;
}
void b43legacy_leds_exit(struct b43legacy_wldev *dev)
{
struct b43legacy_led *led;
int i;
for (i = 0; i < B43legacy_NR_LEDS; i++) {
led = &(dev->leds[i]);
b43legacy_led_blink_stop(led, 1);
}
b43legacy_leds_switch_all(dev, 0);
}
void b43legacy_leds_update(struct b43legacy_wldev *dev, int activity)
{
struct b43legacy_led *led;
struct b43legacy_phy *phy = &dev->phy;
const int transferring = (jiffies - dev->stats.last_tx)
< B43legacy_LED_XFER_THRES;
int i;
int 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 = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
for (i = 0; i < B43legacy_NR_LEDS; i++) {
led = &(dev->leds[i]);
turn_on = 0;
switch (led->behaviour) {
case B43legacy_LED_INACTIVE:
continue;
case B43legacy_LED_OFF:
break;
case B43legacy_LED_ON:
turn_on = 1;
break;
case B43legacy_LED_ACTIVITY:
turn_on = activity;
break;
case B43legacy_LED_RADIO_ALL:
turn_on = radio_enabled;
break;
case B43legacy_LED_RADIO_A:
break;
case B43legacy_LED_RADIO_B:
turn_on = radio_enabled;
break;
case B43legacy_LED_MODE_BG:
if (phy->type == B43legacy_PHYTYPE_G && radio_enabled)
turn_on = 1;
break;
case B43legacy_LED_TRANSFER:
if (transferring)
b43legacy_led_blink_start(led,
B43legacy_LEDBLINK_MEDIUM);
else
b43legacy_led_blink_stop(led, 0);
continue;
case B43legacy_LED_APTRANSFER:
if (b43legacy_is_mode(dev->wl,
IEEE80211_IF_TYPE_AP)) {
if (transferring) {
interval = B43legacy_LEDBLINK_FAST;
turn_on = 1;
}
} else {
turn_on = 1;
if (transferring)
interval = B43legacy_LEDBLINK_FAST;
else
turn_on = 0;
}
if (turn_on)
b43legacy_led_blink_start(led, interval);
else
b43legacy_led_blink_stop(led, 0);
continue;
case B43legacy_LED_WEIRD:
break;
case B43legacy_LED_ASSOC:
turn_on = 1;
#ifdef CONFIG_B43LEGACY_DEBUG
case B43legacy_LED_TEST_BLINKSLOW:
b43legacy_led_blink_start(led, B43legacy_LEDBLINK_SLOW);
continue;
case B43legacy_LED_TEST_BLINKMEDIUM:
b43legacy_led_blink_start(led,
B43legacy_LEDBLINK_MEDIUM);
continue;
case B43legacy_LED_TEST_BLINKFAST:
b43legacy_led_blink_start(led, B43legacy_LEDBLINK_FAST);
continue;
#endif /* CONFIG_B43LEGACY_DEBUG */
default:
B43legacy_BUG_ON(1);
};
if (led->activelow)
turn_on = !turn_on;
if (turn_on)
ledctl |= (1 << i);
else
ledctl &= ~(1 << i);
}
b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
}
void b43legacy_leds_switch_all(struct b43legacy_wldev *dev, int on)
{
struct b43legacy_led *led;
u16 ledctl;
int i;
int bit_on;
unsigned long flags;
spin_lock_irqsave(&dev->wl->leds_lock, flags);
ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
for (i = 0; i < B43legacy_NR_LEDS; i++) {
led = &(dev->leds[i]);
if (led->behaviour == B43legacy_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);
}
b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
}
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