aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/rtl818x/rtl8187_leds.c
blob: a1c670fc1552f32f93f16e25c5fe7c143a2b13d4 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
/*
 * Linux LED driver for RTL8187
 *
 * Copyright 2009 Larry Finger <Larry.Finger@lwfinger.net>
 *
 * Based on the LED handling in the r8187 driver, which is:
 * Copyright (c) Realtek Semiconductor Corp. All rights reserved.
 *
 * Thanks to Realtek for their support!
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifdef CONFIG_RTL8187_LEDS

#include <net/mac80211.h>
#include <linux/usb.h>
#include <linux/eeprom_93cx6.h>

#include "rtl8187.h"
#include "rtl8187_leds.h"

static void led_turn_on(struct work_struct *work)
{
	/* As this routine does read/write operations on the hardware, it must
	 * be run from a work queue.
	 */
	u8 reg;
	struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv,
				    led_on.work);
	struct rtl8187_led *led = &priv->led_tx;

	/* Don't change the LED, when the device is down. */
	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
		return ;

	/* Skip if the LED is not registered. */
	if (!led->dev)
		return;
	mutex_lock(&priv->conf_mutex);
	switch (led->ledpin) {
	case LED_PIN_GPIO0:
		rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x01);
		rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x00);
		break;
	case LED_PIN_LED0:
		reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 4);
		rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
		break;
	case LED_PIN_LED1:
		reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 5);
		rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
		break;
	case LED_PIN_HW:
	default:
		break;
	}
	mutex_unlock(&priv->conf_mutex);
}

static void led_turn_off(struct work_struct *work)
{
	/* As this routine does read/write operations on the hardware, it must
	 * be run from a work queue.
	 */
	u8 reg;
	struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv,
				    led_off.work);
	struct rtl8187_led *led = &priv->led_tx;

	/* Don't change the LED, when the device is down. */
	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
		return ;

	/* Skip if the LED is not registered. */
	if (!led->dev)
		return;
	mutex_lock(&priv->conf_mutex);
	switch (led->ledpin) {
	case LED_PIN_GPIO0:
		rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x01);
		rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x01);
		break;
	case LED_PIN_LED0:
		reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) | (1 << 4);
		rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
		break;
	case LED_PIN_LED1:
		reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) | (1 << 5);
		rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
		break;
	case LED_PIN_HW:
	default:
		break;
	}
	mutex_unlock(&priv->conf_mutex);
}

/* Callback from the LED subsystem. */
static void rtl8187_led_brightness_set(struct led_classdev *led_dev,
				   enum led_brightness brightness)
{
	struct rtl8187_led *led = container_of(led_dev, struct rtl8187_led,
					       led_dev);
	struct ieee80211_hw *hw = led->dev;
	struct rtl8187_priv *priv = hw->priv;

	if (brightness == LED_OFF) {
		ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
		/* The LED is off for 1/20 sec so that it just blinks. */
		ieee80211_queue_delayed_work(hw, &priv->led_on, HZ / 20);
	} else
		ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
}

static int rtl8187_register_led(struct ieee80211_hw *dev,
				struct rtl8187_led *led, const char *name,
				const char *default_trigger, u8 ledpin)
{
	int err;
	struct rtl8187_priv *priv = dev->priv;

	if (led->dev)
		return -EEXIST;
	if (!default_trigger)
		return -EINVAL;
	led->dev = dev;
	led->ledpin = ledpin;
	strncpy(led->name, name, sizeof(led->name));

	led->led_dev.name = led->name;
	led->led_dev.default_trigger = default_trigger;
	led->led_dev.brightness_set = rtl8187_led_brightness_set;

	err = led_classdev_register(&priv->udev->dev, &led->led_dev);
	if (err) {
		printk(KERN_INFO "LEDs: Failed to register %s\n", name);
		led->dev = NULL;
		return err;
	}
	return 0;
}

static void rtl8187_unregister_led(struct rtl8187_led *led)
{
	led_classdev_unregister(&led->led_dev);
	led->dev = NULL;
}

void rtl8187_leds_init(struct ieee80211_hw *dev, u16 custid)
{
	struct rtl8187_priv *priv = dev->priv;
	char name[RTL8187_LED_MAX_NAME_LEN + 1];
	u8 ledpin;
	int err;

	/* According to the vendor driver, the LED operation depends on the
	 * customer ID encoded in the EEPROM
	 */
	printk(KERN_INFO "rtl8187: Customer ID is 0x%02X\n", custid);
	switch (custid) {
	case EEPROM_CID_RSVD0:
	case EEPROM_CID_RSVD1:
	case EEPROM_CID_SERCOMM_PS:
	case EEPROM_CID_QMI:
	case EEPROM_CID_DELL:
	case EEPROM_CID_TOSHIBA:
		ledpin = LED_PIN_GPIO0;
		break;
	case EEPROM_CID_ALPHA0:
		ledpin = LED_PIN_LED0;
		break;
	case EEPROM_CID_HW:
		ledpin = LED_PIN_HW;
		break;
	default:
		ledpin = LED_PIN_GPIO0;
	}

	INIT_DELAYED_WORK(&priv->led_on, led_turn_on);
	INIT_DELAYED_WORK(&priv->led_off, led_turn_off);

	snprintf(name, sizeof(name),
		 "rtl8187-%s::tx", wiphy_name(dev->wiphy));
	err = rtl8187_register_led(dev, &priv->led_tx, name,
			 ieee80211_get_tx_led_name(dev), ledpin);
	if (err)
		goto error;
	snprintf(name, sizeof(name),
		 "rtl8187-%s::rx", wiphy_name(dev->wiphy));
	err = rtl8187_register_led(dev, &priv->led_rx, name,
			 ieee80211_get_rx_led_name(dev), ledpin);
	if (!err) {
		ieee80211_queue_delayed_work(dev, &priv->led_on, 0);
		return;
	}
	/* registration of RX LED failed - unregister TX */
	rtl8187_unregister_led(&priv->led_tx);
error:
	/* If registration of either failed, cancel delayed work */
	cancel_delayed_work_sync(&priv->led_off);
	cancel_delayed_work_sync(&priv->led_on);
}

void rtl8187_leds_exit(struct ieee80211_hw *dev)
{
	struct rtl8187_priv *priv = dev->priv;

	/* turn the LED off before exiting */
	ieee80211_queue_delayed_work(dev, &priv->led_off, 0);
	cancel_delayed_work_sync(&priv->led_off);
	cancel_delayed_work_sync(&priv->led_on);
	rtl8187_unregister_led(&priv->led_rx);
	rtl8187_unregister_led(&priv->led_tx);
}
#endif /* def CONFIG_RTL8187_LED */