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
p54_update_leds(struct work_struct * work)27 static 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
p54_led_brightness_set(struct led_classdev * led_dev,enum led_brightness brightness)64 static 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
p54_register_led(struct p54_common * priv,unsigned int led_index,char * name,const char * trigger)81 static 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
p54_init_leds(struct p54_common * priv)109 int 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
p54_unregister_leds(struct p54_common * priv)145 void 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