1/* 2 * Common code for mac80211 Prism54 drivers 3 * 4 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net> 5 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de> 6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 7 * 8 * Based on: 9 * - the islsm (softmac prism54) driver, which is: 10 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al. 11 * - stlc45xx driver 12 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 */ 18 19#include <linux/init.h> 20#include <linux/firmware.h> 21#include <linux/etherdevice.h> 22 23#include <net/mac80211.h> 24#ifdef CONFIG_P54_LEDS 25#include <linux/leds.h> 26#endif /* CONFIG_P54_LEDS */ 27 28#include "p54.h" 29#include "lmac.h" 30 31static void p54_update_leds(struct work_struct *work) 32{ 33 struct p54_common *priv = container_of(work, struct p54_common, 34 led_work.work); 35 int err, i, tmp, blink_delay = 400; 36 bool rerun = false; 37 38 /* Don't toggle the LED, when the device is down. */ 39 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) 40 return ; 41 42 for (i = 0; i < ARRAY_SIZE(priv->leds); i++) 43 if (priv->leds[i].toggled) { 44 priv->softled_state |= BIT(i); 45 46 tmp = 70 + 200 / (priv->leds[i].toggled); 47 if (tmp < blink_delay) 48 blink_delay = tmp; 49 50 if (priv->leds[i].led_dev.brightness == LED_OFF) 51 rerun = true; 52 53 priv->leds[i].toggled = 54 !!priv->leds[i].led_dev.brightness; 55 } else 56 priv->softled_state &= ~BIT(i); 57 58 err = p54_set_leds(priv); 59 if (err && net_ratelimit()) 60 wiphy_err(priv->hw->wiphy, 61 "failed to update LEDs (%d).\n", err); 62 63 if (rerun) 64 ieee80211_queue_delayed_work(priv->hw, &priv->led_work, 65 msecs_to_jiffies(blink_delay)); 66} 67 68static void p54_led_brightness_set(struct led_classdev *led_dev, 69 enum led_brightness brightness) 70{ 71 struct p54_led_dev *led = container_of(led_dev, struct p54_led_dev, 72 led_dev); 73 struct ieee80211_hw *dev = led->hw_dev; 74 struct p54_common *priv = dev->priv; 75 76 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) 77 return ; 78 79 if ((brightness) && (led->registered)) { 80 led->toggled++; 81 ieee80211_queue_delayed_work(priv->hw, &priv->led_work, HZ/10); 82 } 83} 84 85static int p54_register_led(struct p54_common *priv, 86 unsigned int led_index, 87 char *name, char *trigger) 88{ 89 struct p54_led_dev *led = &priv->leds[led_index]; 90 int err; 91 92 if (led->registered) 93 return -EEXIST; 94 95 snprintf(led->name, sizeof(led->name), "p54-%s::%s", 96 wiphy_name(priv->hw->wiphy), name); 97 led->hw_dev = priv->hw; 98 led->index = led_index; 99 led->led_dev.name = led->name; 100 led->led_dev.default_trigger = trigger; 101 led->led_dev.brightness_set = p54_led_brightness_set; 102 103 err = led_classdev_register(wiphy_dev(priv->hw->wiphy), &led->led_dev); 104 if (err) 105 wiphy_err(priv->hw->wiphy, 106 "Failed to register %s LED.\n", name); 107 else 108 led->registered = 1; 109 110 return err; 111} 112 113int p54_init_leds(struct p54_common *priv) 114{ 115 int err; 116 117 /* 118 * TODO: 119 * Figure out if the EEPROM contains some hints about the number 120 * of available/programmable LEDs of the device. 121 */ 122 123 INIT_DELAYED_WORK(&priv->led_work, p54_update_leds); 124 125 err = p54_register_led(priv, 0, "assoc", 126 ieee80211_get_assoc_led_name(priv->hw)); 127 if (err) 128 return err; 129 130 err = p54_register_led(priv, 1, "tx", 131 ieee80211_get_tx_led_name(priv->hw)); 132 if (err) 133 return err; 134 135 err = p54_register_led(priv, 2, "rx", 136 ieee80211_get_rx_led_name(priv->hw)); 137 if (err) 138 return err; 139 140 err = p54_register_led(priv, 3, "radio", 141 ieee80211_get_radio_led_name(priv->hw)); 142 if (err) 143 return err; 144 145 err = p54_set_leds(priv); 146 return err; 147} 148 149void p54_unregister_leds(struct p54_common *priv) 150{ 151 int i; 152 153 for (i = 0; i < ARRAY_SIZE(priv->leds); i++) { 154 if (priv->leds[i].registered) { 155 priv->leds[i].registered = false; 156 priv->leds[i].toggled = 0; 157 led_classdev_unregister(&priv->leds[i].led_dev); 158 } 159 } 160 161 cancel_delayed_work_sync(&priv->led_work); 162} 163