1 /****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of version 2 of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA 17 * 18 * The full GNU General Public License is included in this distribution in the 19 * file called LICENSE. 20 * 21 * Contact Information: 22 * Intel Linux Wireless <linuxwifi@intel.com> 23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 24 * 25 *****************************************************************************/ 26 27 28 #include <linux/kernel.h> 29 #include <linux/module.h> 30 #include <linux/delay.h> 31 #include <linux/skbuff.h> 32 #include <linux/netdevice.h> 33 #include <net/mac80211.h> 34 #include <linux/etherdevice.h> 35 #include <asm/unaligned.h> 36 #include "iwl-io.h" 37 #include "iwl-trans.h" 38 #include "iwl-modparams.h" 39 #include "dev.h" 40 #include "agn.h" 41 42 /* Throughput OFF time(ms) ON time (ms) 43 * >300 25 25 44 * >200 to 300 40 40 45 * >100 to 200 55 55 46 * >70 to 100 65 65 47 * >50 to 70 75 75 48 * >20 to 50 85 85 49 * >10 to 20 95 95 50 * >5 to 10 110 110 51 * >1 to 5 130 130 52 * >0 to 1 167 167 53 * <=0 SOLID ON 54 */ 55 static const struct ieee80211_tpt_blink iwl_blink[] = { 56 { .throughput = 0, .blink_time = 334 }, 57 { .throughput = 1 * 1024 - 1, .blink_time = 260 }, 58 { .throughput = 5 * 1024 - 1, .blink_time = 220 }, 59 { .throughput = 10 * 1024 - 1, .blink_time = 190 }, 60 { .throughput = 20 * 1024 - 1, .blink_time = 170 }, 61 { .throughput = 50 * 1024 - 1, .blink_time = 150 }, 62 { .throughput = 70 * 1024 - 1, .blink_time = 130 }, 63 { .throughput = 100 * 1024 - 1, .blink_time = 110 }, 64 { .throughput = 200 * 1024 - 1, .blink_time = 80 }, 65 { .throughput = 300 * 1024 - 1, .blink_time = 50 }, 66 }; 67 68 /* Set led register off */ 69 void iwlagn_led_enable(struct iwl_priv *priv) 70 { 71 iwl_write32(priv->trans, CSR_LED_REG, CSR_LED_REG_TURN_ON); 72 } 73 74 /* 75 * Adjust led blink rate to compensate on a MAC Clock difference on every HW 76 * Led blink rate analysis showed an average deviation of 20% on 5000 series 77 * and up. 78 * Need to compensate on the led on/off time per HW according to the deviation 79 * to achieve the desired led frequency 80 * The calculation is: (100-averageDeviation)/100 * blinkTime 81 * For code efficiency the calculation will be: 82 * compensation = (100 - averageDeviation) * 64 / 100 83 * NewBlinkTime = (compensation * BlinkTime) / 64 84 */ 85 static inline u8 iwl_blink_compensation(struct iwl_priv *priv, 86 u8 time, u16 compensation) 87 { 88 if (!compensation) { 89 IWL_ERR(priv, "undefined blink compensation: " 90 "use pre-defined blinking time\n"); 91 return time; 92 } 93 94 return (u8)((time * compensation) >> 6); 95 } 96 97 static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd) 98 { 99 struct iwl_host_cmd cmd = { 100 .id = REPLY_LEDS_CMD, 101 .len = { sizeof(struct iwl_led_cmd), }, 102 .data = { led_cmd, }, 103 .flags = CMD_ASYNC, 104 }; 105 u32 reg; 106 107 reg = iwl_read32(priv->trans, CSR_LED_REG); 108 if (reg != (reg & CSR_LED_BSM_CTRL_MSK)) 109 iwl_write32(priv->trans, CSR_LED_REG, 110 reg & CSR_LED_BSM_CTRL_MSK); 111 112 return iwl_dvm_send_cmd(priv, &cmd); 113 } 114 115 /* Set led pattern command */ 116 static int iwl_led_cmd(struct iwl_priv *priv, 117 unsigned long on, 118 unsigned long off) 119 { 120 struct iwl_led_cmd led_cmd = { 121 .id = IWL_LED_LINK, 122 .interval = IWL_DEF_LED_INTRVL 123 }; 124 int ret; 125 126 if (!test_bit(STATUS_READY, &priv->status)) 127 return -EBUSY; 128 129 if (priv->blink_on == on && priv->blink_off == off) 130 return 0; 131 132 if (off == 0) { 133 /* led is SOLID_ON */ 134 on = IWL_LED_SOLID; 135 } 136 137 IWL_DEBUG_LED(priv, "Led blink time compensation=%u\n", 138 priv->cfg->base_params->led_compensation); 139 led_cmd.on = iwl_blink_compensation(priv, on, 140 priv->cfg->base_params->led_compensation); 141 led_cmd.off = iwl_blink_compensation(priv, off, 142 priv->cfg->base_params->led_compensation); 143 144 ret = iwl_send_led_cmd(priv, &led_cmd); 145 if (!ret) { 146 priv->blink_on = on; 147 priv->blink_off = off; 148 } 149 return ret; 150 } 151 152 static void iwl_led_brightness_set(struct led_classdev *led_cdev, 153 enum led_brightness brightness) 154 { 155 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led); 156 unsigned long on = 0; 157 158 if (brightness > 0) 159 on = IWL_LED_SOLID; 160 161 iwl_led_cmd(priv, on, 0); 162 } 163 164 static int iwl_led_blink_set(struct led_classdev *led_cdev, 165 unsigned long *delay_on, 166 unsigned long *delay_off) 167 { 168 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led); 169 170 return iwl_led_cmd(priv, *delay_on, *delay_off); 171 } 172 173 void iwl_leds_init(struct iwl_priv *priv) 174 { 175 int mode = iwlwifi_mod_params.led_mode; 176 int ret; 177 178 if (mode == IWL_LED_DISABLE) { 179 IWL_INFO(priv, "Led disabled\n"); 180 return; 181 } 182 if (mode == IWL_LED_DEFAULT) 183 mode = priv->cfg->led_mode; 184 185 priv->led.name = kasprintf(GFP_KERNEL, "%s-led", 186 wiphy_name(priv->hw->wiphy)); 187 priv->led.brightness_set = iwl_led_brightness_set; 188 priv->led.blink_set = iwl_led_blink_set; 189 priv->led.max_brightness = 1; 190 191 switch (mode) { 192 case IWL_LED_DEFAULT: 193 WARN_ON(1); 194 break; 195 case IWL_LED_BLINK: 196 priv->led.default_trigger = 197 ieee80211_create_tpt_led_trigger(priv->hw, 198 IEEE80211_TPT_LEDTRIG_FL_CONNECTED, 199 iwl_blink, ARRAY_SIZE(iwl_blink)); 200 break; 201 case IWL_LED_RF_STATE: 202 priv->led.default_trigger = 203 ieee80211_get_radio_led_name(priv->hw); 204 break; 205 } 206 207 ret = led_classdev_register(priv->trans->dev, &priv->led); 208 if (ret) { 209 kfree(priv->led.name); 210 return; 211 } 212 213 priv->led_registered = true; 214 } 215 216 void iwl_leds_exit(struct iwl_priv *priv) 217 { 218 if (!priv->led_registered) 219 return; 220 221 led_classdev_unregister(&priv->led); 222 kfree(priv->led.name); 223 } 224