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a027087a LF |
1 | /* |
2 | * Linux LED driver for RTL8187 | |
3 | * | |
4 | * Copyright 2009 Larry Finger <Larry.Finger@lwfinger.net> | |
5 | * | |
6 | * Based on the LED handling in the r8187 driver, which is: | |
7 | * Copyright (c) Realtek Semiconductor Corp. All rights reserved. | |
8 | * | |
9 | * Thanks to Realtek for their support! | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
15 | ||
16 | #ifdef CONFIG_RTL8187_LEDS | |
17 | ||
18 | #include <net/mac80211.h> | |
19 | #include <linux/usb.h> | |
20 | #include <linux/eeprom_93cx6.h> | |
21 | ||
22 | #include "rtl8187.h" | |
23 | #include "rtl8187_leds.h" | |
24 | ||
25 | static void led_turn_on(struct work_struct *work) | |
26 | { | |
27 | /* As this routine does read/write operations on the hardware, it must | |
28 | * be run from a work queue. | |
29 | */ | |
30 | u8 reg; | |
31 | struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv, | |
32 | led_on.work); | |
33 | struct rtl8187_led *led = &priv->led_tx; | |
34 | ||
35 | /* Don't change the LED, when the device is down. */ | |
36 | if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) | |
37 | return ; | |
38 | ||
39 | /* Skip if the LED is not registered. */ | |
40 | if (!led->dev) | |
41 | return; | |
42 | mutex_lock(&priv->conf_mutex); | |
43 | switch (led->ledpin) { | |
44 | case LED_PIN_GPIO0: | |
ca9152e3 | 45 | rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x01); |
a027087a LF |
46 | rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x00); |
47 | break; | |
48 | case LED_PIN_LED0: | |
49 | reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 4); | |
50 | rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg); | |
51 | break; | |
52 | case LED_PIN_LED1: | |
53 | reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 5); | |
54 | rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg); | |
55 | break; | |
56 | case LED_PIN_HW: | |
57 | default: | |
58 | break; | |
59 | } | |
60 | mutex_unlock(&priv->conf_mutex); | |
61 | } | |
62 | ||
63 | static void led_turn_off(struct work_struct *work) | |
64 | { | |
65 | /* As this routine does read/write operations on the hardware, it must | |
66 | * be run from a work queue. | |
67 | */ | |
68 | u8 reg; | |
69 | struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv, | |
70 | led_off.work); | |
71 | struct rtl8187_led *led = &priv->led_tx; | |
72 | ||
73 | /* Don't change the LED, when the device is down. */ | |
74 | if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) | |
75 | return ; | |
76 | ||
77 | /* Skip if the LED is not registered. */ | |
78 | if (!led->dev) | |
79 | return; | |
80 | mutex_lock(&priv->conf_mutex); | |
81 | switch (led->ledpin) { | |
82 | case LED_PIN_GPIO0: | |
ca9152e3 | 83 | rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x01); |
a027087a LF |
84 | rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x01); |
85 | break; | |
86 | case LED_PIN_LED0: | |
87 | reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) | (1 << 4); | |
88 | rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg); | |
89 | break; | |
90 | case LED_PIN_LED1: | |
91 | reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) | (1 << 5); | |
92 | rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg); | |
93 | break; | |
94 | case LED_PIN_HW: | |
95 | default: | |
96 | break; | |
97 | } | |
98 | mutex_unlock(&priv->conf_mutex); | |
99 | } | |
100 | ||
101 | /* Callback from the LED subsystem. */ | |
102 | static void rtl8187_led_brightness_set(struct led_classdev *led_dev, | |
103 | enum led_brightness brightness) | |
104 | { | |
105 | struct rtl8187_led *led = container_of(led_dev, struct rtl8187_led, | |
106 | led_dev); | |
107 | struct ieee80211_hw *hw = led->dev; | |
108 | struct rtl8187_priv *priv = hw->priv; | |
109 | ||
110 | if (brightness == LED_OFF) { | |
42935eca | 111 | ieee80211_queue_delayed_work(hw, &priv->led_off, 0); |
a027087a | 112 | /* The LED is off for 1/20 sec so that it just blinks. */ |
42935eca | 113 | ieee80211_queue_delayed_work(hw, &priv->led_on, HZ / 20); |
a027087a | 114 | } else |
42935eca | 115 | ieee80211_queue_delayed_work(hw, &priv->led_on, 0); |
a027087a LF |
116 | } |
117 | ||
118 | static int rtl8187_register_led(struct ieee80211_hw *dev, | |
119 | struct rtl8187_led *led, const char *name, | |
120 | const char *default_trigger, u8 ledpin) | |
121 | { | |
122 | int err; | |
123 | struct rtl8187_priv *priv = dev->priv; | |
124 | ||
125 | if (led->dev) | |
126 | return -EEXIST; | |
127 | if (!default_trigger) | |
128 | return -EINVAL; | |
129 | led->dev = dev; | |
130 | led->ledpin = ledpin; | |
131 | strncpy(led->name, name, sizeof(led->name)); | |
132 | ||
133 | led->led_dev.name = led->name; | |
134 | led->led_dev.default_trigger = default_trigger; | |
135 | led->led_dev.brightness_set = rtl8187_led_brightness_set; | |
136 | ||
137 | err = led_classdev_register(&priv->udev->dev, &led->led_dev); | |
138 | if (err) { | |
139 | printk(KERN_INFO "LEDs: Failed to register %s\n", name); | |
140 | led->dev = NULL; | |
141 | return err; | |
142 | } | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static void rtl8187_unregister_led(struct rtl8187_led *led) | |
147 | { | |
148 | led_classdev_unregister(&led->led_dev); | |
149 | led->dev = NULL; | |
150 | } | |
151 | ||
152 | void rtl8187_leds_init(struct ieee80211_hw *dev, u16 custid) | |
153 | { | |
154 | struct rtl8187_priv *priv = dev->priv; | |
155 | char name[RTL8187_LED_MAX_NAME_LEN + 1]; | |
156 | u8 ledpin; | |
157 | int err; | |
158 | ||
159 | /* According to the vendor driver, the LED operation depends on the | |
160 | * customer ID encoded in the EEPROM | |
161 | */ | |
162 | printk(KERN_INFO "rtl8187: Customer ID is 0x%02X\n", custid); | |
163 | switch (custid) { | |
164 | case EEPROM_CID_RSVD0: | |
165 | case EEPROM_CID_RSVD1: | |
166 | case EEPROM_CID_SERCOMM_PS: | |
167 | case EEPROM_CID_QMI: | |
168 | case EEPROM_CID_DELL: | |
169 | case EEPROM_CID_TOSHIBA: | |
170 | ledpin = LED_PIN_GPIO0; | |
171 | break; | |
172 | case EEPROM_CID_ALPHA0: | |
173 | ledpin = LED_PIN_LED0; | |
174 | break; | |
175 | case EEPROM_CID_HW: | |
176 | ledpin = LED_PIN_HW; | |
177 | break; | |
178 | default: | |
179 | ledpin = LED_PIN_GPIO0; | |
180 | } | |
181 | ||
182 | INIT_DELAYED_WORK(&priv->led_on, led_turn_on); | |
183 | INIT_DELAYED_WORK(&priv->led_off, led_turn_off); | |
184 | ||
185 | snprintf(name, sizeof(name), | |
186 | "rtl8187-%s::tx", wiphy_name(dev->wiphy)); | |
187 | err = rtl8187_register_led(dev, &priv->led_tx, name, | |
188 | ieee80211_get_tx_led_name(dev), ledpin); | |
189 | if (err) | |
190 | goto error; | |
191 | snprintf(name, sizeof(name), | |
192 | "rtl8187-%s::rx", wiphy_name(dev->wiphy)); | |
193 | err = rtl8187_register_led(dev, &priv->led_rx, name, | |
194 | ieee80211_get_rx_led_name(dev), ledpin); | |
195 | if (!err) { | |
42935eca | 196 | ieee80211_queue_delayed_work(dev, &priv->led_on, 0); |
a027087a LF |
197 | return; |
198 | } | |
199 | /* registration of RX LED failed - unregister TX */ | |
200 | rtl8187_unregister_led(&priv->led_tx); | |
201 | error: | |
202 | /* If registration of either failed, cancel delayed work */ | |
203 | cancel_delayed_work_sync(&priv->led_off); | |
204 | cancel_delayed_work_sync(&priv->led_on); | |
205 | } | |
206 | ||
207 | void rtl8187_leds_exit(struct ieee80211_hw *dev) | |
208 | { | |
209 | struct rtl8187_priv *priv = dev->priv; | |
210 | ||
a027087a | 211 | /* turn the LED off before exiting */ |
42935eca | 212 | ieee80211_queue_delayed_work(dev, &priv->led_off, 0); |
a027087a | 213 | cancel_delayed_work_sync(&priv->led_off); |
3da7429c | 214 | cancel_delayed_work_sync(&priv->led_on); |
a027087a | 215 | rtl8187_unregister_led(&priv->led_rx); |
3da7429c | 216 | rtl8187_unregister_led(&priv->led_tx); |
a027087a LF |
217 | } |
218 | #endif /* def CONFIG_RTL8187_LED */ | |
219 |