drivers/net/wireless/ath/ath5k/led.c

   1 /*
   2  * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
   3  * Copyright (c) 2004-2005 Atheros Communications, Inc.
   4  * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
   5  * Copyright (c) 2009 Bob Copeland <me@bobcopeland.com>
   6  *
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer,
  14  *    without modification.
  15  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  16  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
  17  *    redistribution must be conditioned upon including a substantially
  18  *    similar Disclaimer requirement for further binary redistribution.
  19  * 3. Neither the names of the above-listed copyright holders nor the names
  20  *    of any contributors may be used to endorse or promote products derived
  21  *    from this software without specific prior written permission.
  22  *
  23  * Alternatively, this software may be distributed under the terms of the
  24  * GNU General Public License ("GPL") version 2 as published by the Free
  25  * Software Foundation.
  26  *
  27  * NO WARRANTY
  28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  29  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  30  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
  31  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  32  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
  33  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  36  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  38  * THE POSSIBILITY OF SUCH DAMAGES.
  39  *
  40  */
  41
  42 #include <linux/pci.h>
  43 #include "ath5k.h"
  44 #include "base.h"
  45
  46 #define ATH_SDEVICE(subv,subd) \
  47         .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
  48         .subvendor = (subv), .subdevice = (subd)
  49
  50 #define ATH_LED(pin,polarity) .driver_data = (((pin) << 8) | (polarity))
  51 #define ATH_PIN(data) ((data) >> 8)
  52 #define ATH_POLARITY(data) ((data) & 0xff)
  53
  54 /* Devices we match on for LED config info (typically laptops) */
  55 static const struct pci_device_id ath5k_led_devices[] = {
  56         /* AR5211 */
  57         { PCI_VDEVICE(ATHEROS, PCI_DEVICE_ID_ATHEROS_AR5211), ATH_LED(0, 0) },
  58         /* HP Compaq nc6xx, nc4000, nx6000 */
  59         { ATH_SDEVICE(PCI_VENDOR_ID_COMPAQ, PCI_ANY_ID), ATH_LED(1, 1) },
  60         /* Acer Aspire One A150 (maximlevitsky@gmail.com) */
  61         { ATH_SDEVICE(PCI_VENDOR_ID_FOXCONN, 0xe008), ATH_LED(3, 0) },
  62         /* Acer Ferrari 5000 (russ.dill@gmail.com) */
  63         { ATH_SDEVICE(PCI_VENDOR_ID_AMBIT, 0x0422), ATH_LED(1, 1) },
  64         /* E-machines E510 (tuliom@gmail.com) */
  65         { ATH_SDEVICE(PCI_VENDOR_ID_AMBIT, 0x0428), ATH_LED(3, 0) },
  66         /* Acer Extensa 5620z (nekoreeve@gmail.com) */
  67         { ATH_SDEVICE(PCI_VENDOR_ID_QMI, 0x0105), ATH_LED(3, 0) },
  68         /* Fukato Datacask Jupiter 1014a (mrb74@gmx.at) */
  69         { ATH_SDEVICE(PCI_VENDOR_ID_AZWAVE, 0x1026), ATH_LED(3, 0) },
  70         /* IBM ThinkPad AR5BXB6 (legovini@spiro.fisica.unipd.it) */
  71         { ATH_SDEVICE(PCI_VENDOR_ID_IBM, 0x058a), ATH_LED(1, 0) },
  72         /* IBM-specific AR5212 (all others) */
  73         { PCI_VDEVICE(ATHEROS, PCI_DEVICE_ID_ATHEROS_AR5212_IBM), ATH_LED(0, 0) },
  74         { }
  75 };
  76
  77 void ath5k_led_enable(struct ath5k_softc *sc)
  78 {
  79         if (test_bit(ATH_STAT_LEDSOFT, sc->status)) {
  80                 ath5k_hw_set_gpio_output(sc->ah, sc->led_pin);
  81                 ath5k_led_off(sc);
  82         }
  83 }
  84
  85 static void ath5k_led_on(struct ath5k_softc *sc)
  86 {
  87         if (!test_bit(ATH_STAT_LEDSOFT, sc->status))
  88                 return;
  89         ath5k_hw_set_gpio(sc->ah, sc->led_pin, sc->led_on);
  90 }
  91
  92 void ath5k_led_off(struct ath5k_softc *sc)
  93 {
  94         if (!test_bit(ATH_STAT_LEDSOFT, sc->status))
  95                 return;
  96         ath5k_hw_set_gpio(sc->ah, sc->led_pin, !sc->led_on);
  97 }
  98
  99 static void
 100 ath5k_led_brightness_set(struct led_classdev *led_dev,
 101         enum led_brightness brightness)
 102 {
 103         struct ath5k_led *led = container_of(led_dev, struct ath5k_led,
 104                 led_dev);
 105
 106         if (brightness == LED_OFF)
 107                 ath5k_led_off(led->sc);
 108         else
 109                 ath5k_led_on(led->sc);
 110 }
 111
 112 static int
 113 ath5k_register_led(struct ath5k_softc *sc, struct ath5k_led *led,
 114                    const char *name, char *trigger)
 115 {
 116         int err;
 117
 118         led->sc = sc;
 119         strncpy(led->name, name, sizeof(led->name));
 120         led->led_dev.name = led->name;
 121         led->led_dev.default_trigger = trigger;
 122         led->led_dev.brightness_set = ath5k_led_brightness_set;
 123
 124         err = led_classdev_register(&sc->pdev->dev, &led->led_dev);
 125         if (err) {
 126                 ATH5K_WARN(sc, "could not register LED %s\n", name);
 127                 led->sc = NULL;
 128         }
 129         return err;
 130 }
 131
 132 static void
 133 ath5k_unregister_led(struct ath5k_led *led)
 134 {
 135         if (!led->sc)
 136                 return;
 137         led_classdev_unregister(&led->led_dev);
 138         ath5k_led_off(led->sc);
 139         led->sc = NULL;
 140 }
 141
 142 void ath5k_unregister_leds(struct ath5k_softc *sc)
 143 {
 144         ath5k_unregister_led(&sc->rx_led);
 145         ath5k_unregister_led(&sc->tx_led);
 146 }
 147
 148 int ath5k_init_leds(struct ath5k_softc *sc)
 149 {
 150         int ret = 0;
 151         struct ieee80211_hw *hw = sc->hw;
 152         struct pci_dev *pdev = sc->pdev;
 153         char name[ATH5K_LED_MAX_NAME_LEN + 1];
 154         const struct pci_device_id *match;
 155
 156         match = pci_match_id(&ath5k_led_devices[0], pdev);
 157         if (match) {
 158                 __set_bit(ATH_STAT_LEDSOFT, sc->status);
 159                 sc->led_pin = ATH_PIN(match->driver_data);
 160                 sc->led_on = ATH_POLARITY(match->driver_data);
 161         }
 162
 163         if (!test_bit(ATH_STAT_LEDSOFT, sc->status))
 164                 goto out;
 165
 166         ath5k_led_enable(sc);
 167
 168         snprintf(name, sizeof(name), "ath5k-%s::rx", wiphy_name(hw->wiphy));
 169         ret = ath5k_register_led(sc, &sc->rx_led, name,
 170                 ieee80211_get_rx_led_name(hw));
 171         if (ret)
 172                 goto out;
 173
 174         snprintf(name, sizeof(name), "ath5k-%s::tx", wiphy_name(hw->wiphy));
 175         ret = ath5k_register_led(sc, &sc->tx_led, name,
 176                 ieee80211_get_tx_led_name(hw));
 177 out:
 178         return ret;
 179 }
 180