Larry Finger | a027087 | 2009-04-16 19:56:38 -0500 | [diff] [blame] | 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: |
| 45 | rtl818x_iowrite8(priv, &priv->map->GPIO, 0x01); |
| 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: |
| 83 | rtl818x_iowrite8(priv, &priv->map->GPIO, 0x01); |
| 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) { |
| 111 | queue_delayed_work(hw->workqueue, &priv->led_off, 0); |
| 112 | /* The LED is off for 1/20 sec so that it just blinks. */ |
| 113 | queue_delayed_work(hw->workqueue, &priv->led_on, HZ / 20); |
| 114 | } else |
| 115 | queue_delayed_work(hw->workqueue, &priv->led_on, 0); |
| 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) { |
| 196 | queue_delayed_work(dev->workqueue, &priv->led_on, 0); |
| 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 | |
Larry Finger | a027087 | 2009-04-16 19:56:38 -0500 | [diff] [blame] | 211 | /* turn the LED off before exiting */ |
| 212 | queue_delayed_work(dev->workqueue, &priv->led_off, 0); |
| 213 | cancel_delayed_work_sync(&priv->led_off); |
Larry Finger | 3da7429 | 2009-07-14 15:55:16 -0500 | [diff] [blame] | 214 | cancel_delayed_work_sync(&priv->led_on); |
Larry Finger | a027087 | 2009-04-16 19:56:38 -0500 | [diff] [blame] | 215 | rtl8187_unregister_led(&priv->led_rx); |
Larry Finger | 3da7429 | 2009-07-14 15:55:16 -0500 | [diff] [blame] | 216 | rtl8187_unregister_led(&priv->led_tx); |
Larry Finger | a027087 | 2009-04-16 19:56:38 -0500 | [diff] [blame] | 217 | } |
| 218 | #endif /* def CONFIG_RTL8187_LED */ |
| 219 | |