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3  * This file is provided under a dual BSD/GPLv2 license.  When using or
4  * redistributing this file, you may do so under either license.
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6  * GPL LICENSE SUMMARY
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8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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28  *  Intel Linux Wireless <linuxwifi@intel.com>
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62  *****************************************************************************/
63 
64 #include <linux/leds.h>
65 #include "iwl-io.h"
66 #include "iwl-csr.h"
67 #include "mvm.h"
68 
69 /* Set led register on */
70 static void iwl_mvm_led_enable(struct iwl_mvm *mvm)
71 {
72 	iwl_write32(mvm->trans, CSR_LED_REG, CSR_LED_REG_TURN_ON);
73 }
74 
75 /* Set led register off */
76 static void iwl_mvm_led_disable(struct iwl_mvm *mvm)
77 {
78 	iwl_write32(mvm->trans, CSR_LED_REG, CSR_LED_REG_TURN_OFF);
79 }
80 
81 static void iwl_led_brightness_set(struct led_classdev *led_cdev,
82 				   enum led_brightness brightness)
83 {
84 	struct iwl_mvm *mvm = container_of(led_cdev, struct iwl_mvm, led);
85 	if (brightness > 0)
86 		iwl_mvm_led_enable(mvm);
87 	else
88 		iwl_mvm_led_disable(mvm);
89 }
90 
91 int iwl_mvm_leds_init(struct iwl_mvm *mvm)
92 {
93 	int mode = iwlwifi_mod_params.led_mode;
94 	int ret;
95 
96 	switch (mode) {
97 	case IWL_LED_BLINK:
98 		IWL_ERR(mvm, "Blink led mode not supported, used default\n");
99 	case IWL_LED_DEFAULT:
100 	case IWL_LED_RF_STATE:
101 		mode = IWL_LED_RF_STATE;
102 		break;
103 	case IWL_LED_DISABLE:
104 		IWL_INFO(mvm, "Led disabled\n");
105 		return 0;
106 	default:
107 		return -EINVAL;
108 	}
109 
110 	mvm->led.name = kasprintf(GFP_KERNEL, "%s-led",
111 				   wiphy_name(mvm->hw->wiphy));
112 	mvm->led.brightness_set = iwl_led_brightness_set;
113 	mvm->led.max_brightness = 1;
114 
115 	if (mode == IWL_LED_RF_STATE)
116 		mvm->led.default_trigger =
117 			ieee80211_get_radio_led_name(mvm->hw);
118 
119 	ret = led_classdev_register(mvm->trans->dev, &mvm->led);
120 	if (ret) {
121 		kfree(mvm->led.name);
122 		IWL_INFO(mvm, "Failed to enable led\n");
123 		return ret;
124 	}
125 
126 	return 0;
127 }
128 
129 void iwl_mvm_leds_exit(struct iwl_mvm *mvm)
130 {
131 	if (iwlwifi_mod_params.led_mode == IWL_LED_DISABLE)
132 		return;
133 
134 	led_classdev_unregister(&mvm->led);
135 	kfree(mvm->led.name);
136 }
137