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