1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Common code for mac80211 Prism54 drivers
4 *
5 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
6 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8 *
9 * Based on:
10 * - the islsm (softmac prism54) driver, which is:
11 *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
12 * - stlc45xx driver
13 *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
14 */
15
16#include <linux/firmware.h>
17#include <linux/etherdevice.h>
18
19#include <net/mac80211.h>
20#ifdef CONFIG_P54_LEDS
21#include <linux/leds.h>
22#endif /* CONFIG_P54_LEDS */
23
24#include "p54.h"
25#include "lmac.h"
26
27static void p54_update_leds(struct work_struct *work)
28{
29	struct p54_common *priv = container_of(work, struct p54_common,
30					       led_work.work);
31	int err, i, tmp, blink_delay = 400;
32	bool rerun = false;
33
34	/* Don't toggle the LED, when the device is down. */
35	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
36		return ;
37
38	for (i = 0; i < ARRAY_SIZE(priv->leds); i++)
39		if (priv->leds[i].toggled) {
40			priv->softled_state |= BIT(i);
41
42			tmp = 70 + 200 / (priv->leds[i].toggled);
43			if (tmp < blink_delay)
44				blink_delay = tmp;
45
46			if (priv->leds[i].led_dev.brightness == LED_OFF)
47				rerun = true;
48
49			priv->leds[i].toggled =
50				!!priv->leds[i].led_dev.brightness;
51		} else
52			priv->softled_state &= ~BIT(i);
53
54	err = p54_set_leds(priv);
55	if (err && net_ratelimit())
56		wiphy_err(priv->hw->wiphy,
57			  "failed to update LEDs (%d).\n", err);
58
59	if (rerun)
60		ieee80211_queue_delayed_work(priv->hw, &priv->led_work,
61			msecs_to_jiffies(blink_delay));
62}
63
64static void p54_led_brightness_set(struct led_classdev *led_dev,
65				   enum led_brightness brightness)
66{
67	struct p54_led_dev *led = container_of(led_dev, struct p54_led_dev,
68					       led_dev);
69	struct ieee80211_hw *dev = led->hw_dev;
70	struct p54_common *priv = dev->priv;
71
72	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
73		return ;
74
75	if ((brightness) && (led->registered)) {
76		led->toggled++;
77		ieee80211_queue_delayed_work(priv->hw, &priv->led_work, HZ/10);
78	}
79}
80
81static int p54_register_led(struct p54_common *priv,
82			    unsigned int led_index,
83			    char *name, const char *trigger)
84{
85	struct p54_led_dev *led = &priv->leds[led_index];
86	int err;
87
88	if (led->registered)
89		return -EEXIST;
90
91	snprintf(led->name, sizeof(led->name), "p54-%s::%s",
92		 wiphy_name(priv->hw->wiphy), name);
93	led->hw_dev = priv->hw;
94	led->index = led_index;
95	led->led_dev.name = led->name;
96	led->led_dev.default_trigger = trigger;
97	led->led_dev.brightness_set = p54_led_brightness_set;
98
99	err = led_classdev_register(wiphy_dev(priv->hw->wiphy), &led->led_dev);
100	if (err)
101		wiphy_err(priv->hw->wiphy,
102			  "Failed to register %s LED.\n", name);
103	else
104		led->registered = 1;
105
106	return err;
107}
108
109int p54_init_leds(struct p54_common *priv)
110{
111	int err;
112
113	/*
114	 * TODO:
115	 * Figure out if the EEPROM contains some hints about the number
116	 * of available/programmable LEDs of the device.
117	 */
118
119	INIT_DELAYED_WORK(&priv->led_work, p54_update_leds);
120
121	err = p54_register_led(priv, 0, "assoc",
122			       ieee80211_get_assoc_led_name(priv->hw));
123	if (err)
124		return err;
125
126	err = p54_register_led(priv, 1, "tx",
127			       ieee80211_get_tx_led_name(priv->hw));
128	if (err)
129		return err;
130
131	err = p54_register_led(priv, 2, "rx",
132			       ieee80211_get_rx_led_name(priv->hw));
133	if (err)
134		return err;
135
136	err = p54_register_led(priv, 3, "radio",
137			       ieee80211_get_radio_led_name(priv->hw));
138	if (err)
139		return err;
140
141	err = p54_set_leds(priv);
142	return err;
143}
144
145void p54_unregister_leds(struct p54_common *priv)
146{
147	int i;
148
149	for (i = 0; i < ARRAY_SIZE(priv->leds); i++) {
150		if (priv->leds[i].registered) {
151			priv->leds[i].registered = false;
152			priv->leds[i].toggled = 0;
153			led_classdev_unregister(&priv->leds[i].led_dev);
154		}
155	}
156
157	cancel_delayed_work_sync(&priv->led_work);
158}
159