led.c

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/*
 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
 * Copyright (c) 2004-2005 Atheros Communications, Inc.
 * Copyright (c) 2007 Jiri Slaby <[email protected]>
 * Copyright (c) 2009 Bob Copeland <[email protected]>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
 *    redistribution must be conditioned upon including a substantially
 *    similar Disclaimer requirement for further binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGES.
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/pci.h>
#include "ath5k.h"

#define ATH_SDEVICE(subv, subd) \
    .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
    .subvendor = (subv), .subdevice = (subd)

#define ATH_LED(pin, polarity) .driver_data = (((pin) << 8) | (polarity))
#define ATH_PIN(data) ((data) >> 8)
#define ATH_POLARITY(data) ((data) & 0xff)

/* Devices we match on for LED config info (typically laptops) */
static DEFINE_PCI_DEVICE_TABLE(ath5k_led_devices) = {
    /* AR5211 */
    { PCI_VDEVICE(ATHEROS, PCI_DEVICE_ID_ATHEROS_AR5211), ATH_LED(0, 0) },
    /* HP Compaq nc6xx, nc4000, nx6000 */
    { ATH_SDEVICE(PCI_VENDOR_ID_COMPAQ, PCI_ANY_ID), ATH_LED(1, 1) },
    /* Acer Aspire One A150 ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_FOXCONN, 0xe008), ATH_LED(3, 0) },
    /* Acer Aspire One AO531h AO751h ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_FOXCONN, 0xe00d), ATH_LED(3, 0) },
    /* Acer Ferrari 5000 ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_AMBIT, 0x0422), ATH_LED(1, 1) },
    /* E-machines E510 ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_AMBIT, 0x0428), ATH_LED(3, 0) },
    /* BenQ Joybook R55v ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_QMI, 0x0100), ATH_LED(1, 0) },
    /* Acer Extensa 5620z ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_QMI, 0x0105), ATH_LED(3, 0) },
    /* Fukato Datacask Jupiter 1014a ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_AZWAVE, 0x1026), ATH_LED(3, 0) },
    /* IBM ThinkPad AR5BXB6 ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_IBM, 0x058a), ATH_LED(1, 0) },
    /* HP Compaq CQ60-206US ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_HP, 0x0137a), ATH_LED(3, 1) },
    /* HP Compaq C700 ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_HP, 0x0137b), ATH_LED(3, 1) },
    /* LiteOn AR5BXB63 ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_ATHEROS, 0x3067), ATH_LED(3, 0) },
    /* IBM-specific AR5212 (all others) */
    { PCI_VDEVICE(ATHEROS, PCI_DEVICE_ID_ATHEROS_AR5212_IBM), ATH_LED(0, 0) },
    /* Dell Vostro A860 ([email protected]) */
    { ATH_SDEVICE(PCI_VENDOR_ID_QMI, 0x0112), ATH_LED(3, 0) },
    { }
};

void ath5k_led_enable(struct ath5k_hw *ah)
{
    if (test_bit(ATH_STAT_LEDSOFT, ah->status)) {
        ath5k_hw_set_gpio_output(ah, ah->led_pin);
        ath5k_led_off(ah);
    }
}

static void ath5k_led_on(struct ath5k_hw *ah)
{
    if (!test_bit(ATH_STAT_LEDSOFT, ah->status))
        return;
    ath5k_hw_set_gpio(ah, ah->led_pin, ah->led_on);
}

void ath5k_led_off(struct ath5k_hw *ah)
{
    if (!test_bit(ATH_STAT_LEDSOFT, ah->status))
        return;
    ath5k_hw_set_gpio(ah, ah->led_pin, !ah->led_on);
}

static void
ath5k_led_brightness_set(struct led_classdev *led_dev,
    enum led_brightness brightness)
{
    struct ath5k_led *led = container_of(led_dev, struct ath5k_led,
        led_dev);

    if (brightness == LED_OFF)
        ath5k_led_off(led->ah);
    else
        ath5k_led_on(led->ah);
}

static int
ath5k_register_led(struct ath5k_hw *ah, struct ath5k_led *led,
           const char *name, char *trigger)
{
    int err;

    led->ah = ah;
    strncpy(led->name, name, sizeof(led->name));
    led->led_dev.name = led->name;
    led->led_dev.default_trigger = trigger;
    led->led_dev.brightness_set = ath5k_led_brightness_set;

    err = led_classdev_register(ah->dev, &led->led_dev);
    if (err) {
        ATH5K_WARN(ah, "could not register LED %s\n", name);
        led->ah = NULL;
    }
    return err;
}

static void
ath5k_unregister_led(struct ath5k_led *led)
{
    if (!led->ah)
        return;
    led_classdev_unregister(&led->led_dev);
    ath5k_led_off(led->ah);
    led->ah = NULL;
}

void ath5k_unregister_leds(struct ath5k_hw *ah)
{
    ath5k_unregister_led(&ah->rx_led);
    ath5k_unregister_led(&ah->tx_led);
}

int __devinit ath5k_init_leds(struct ath5k_hw *ah)
{
    int ret = 0;
    struct ieee80211_hw *hw = ah->hw;
#ifndef CONFIG_ATHEROS_AR231X
    struct pci_dev *pdev = ah->pdev;
#endif
    char name[ATH5K_LED_MAX_NAME_LEN + 1];
    const struct pci_device_id *match;

    if (!ah->pdev)
        return 0;

#ifdef CONFIG_ATHEROS_AR231X
    match = NULL;
#else
    match = pci_match_id(&ath5k_led_devices[0], pdev);
#endif
    if (match) {
        __set_bit(ATH_STAT_LEDSOFT, ah->status);
        ah->led_pin = ATH_PIN(match->driver_data);
        ah->led_on = ATH_POLARITY(match->driver_data);
    }

    if (!test_bit(ATH_STAT_LEDSOFT, ah->status))
        goto out;

    ath5k_led_enable(ah);

    snprintf(name, sizeof(name), "ath5k-%s::rx", wiphy_name(hw->wiphy));
    ret = ath5k_register_led(ah, &ah->rx_led, name,
        ieee80211_get_rx_led_name(hw));
    if (ret)
        goto out;

    snprintf(name, sizeof(name), "ath5k-%s::tx", wiphy_name(hw->wiphy));
    ret = ath5k_register_led(ah, &ah->tx_led, name,
        ieee80211_get_tx_led_name(hw));
out:
    return ret;
}