1/****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2011 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 <ilw@linux.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/init.h> 31#include <linux/delay.h> 32#include <linux/skbuff.h> 33#include <linux/netdevice.h> 34#include <net/mac80211.h> 35#include <linux/etherdevice.h> 36#include <asm/unaligned.h> 37 38#include "iwl-dev.h" 39#include "iwl-core.h" 40#include "iwl-agn.h" 41#include "iwl-io.h" 42#include "iwl-trans.h" 43#include "iwl-shared.h" 44 45/* Throughput OFF time(ms) ON time (ms) 46 * >300 25 25 47 * >200 to 300 40 40 48 * >100 to 200 55 55 49 * >70 to 100 65 65 50 * >50 to 70 75 75 51 * >20 to 50 85 85 52 * >10 to 20 95 95 53 * >5 to 10 110 110 54 * >1 to 5 130 130 55 * >0 to 1 167 167 56 * <=0 SOLID ON 57 */ 58static const struct ieee80211_tpt_blink iwl_blink[] = { 59 { .throughput = 0, .blink_time = 334 }, 60 { .throughput = 1 * 1024 - 1, .blink_time = 260 }, 61 { .throughput = 5 * 1024 - 1, .blink_time = 220 }, 62 { .throughput = 10 * 1024 - 1, .blink_time = 190 }, 63 { .throughput = 20 * 1024 - 1, .blink_time = 170 }, 64 { .throughput = 50 * 1024 - 1, .blink_time = 150 }, 65 { .throughput = 70 * 1024 - 1, .blink_time = 130 }, 66 { .throughput = 100 * 1024 - 1, .blink_time = 110 }, 67 { .throughput = 200 * 1024 - 1, .blink_time = 80 }, 68 { .throughput = 300 * 1024 - 1, .blink_time = 50 }, 69}; 70 71/* Set led register off */ 72void iwlagn_led_enable(struct iwl_priv *priv) 73{ 74 iwl_write32(bus(priv), CSR_LED_REG, CSR_LED_REG_TRUN_ON); 75} 76 77/* 78 * Adjust led blink rate to compensate on a MAC Clock difference on every HW 79 * Led blink rate analysis showed an average deviation of 20% on 5000 series 80 * and up. 81 * Need to compensate on the led on/off time per HW according to the deviation 82 * to achieve the desired led frequency 83 * The calculation is: (100-averageDeviation)/100 * blinkTime 84 * For code efficiency the calculation will be: 85 * compensation = (100 - averageDeviation) * 64 / 100 86 * NewBlinkTime = (compensation * BlinkTime) / 64 87 */ 88static inline u8 iwl_blink_compensation(struct iwl_priv *priv, 89 u8 time, u16 compensation) 90{ 91 if (!compensation) { 92 IWL_ERR(priv, "undefined blink compensation: " 93 "use pre-defined blinking time\n"); 94 return time; 95 } 96 97 return (u8)((time * compensation) >> 6); 98} 99 100static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd) 101{ 102 struct iwl_host_cmd cmd = { 103 .id = REPLY_LEDS_CMD, 104 .len = { sizeof(struct iwl_led_cmd), }, 105 .data = { led_cmd, }, 106 .flags = CMD_ASYNC, 107 }; 108 u32 reg; 109 110 reg = iwl_read32(bus(priv), CSR_LED_REG); 111 if (reg != (reg & CSR_LED_BSM_CTRL_MSK)) 112 iwl_write32(bus(priv), CSR_LED_REG, reg & CSR_LED_BSM_CTRL_MSK); 113 114 return iwl_trans_send_cmd(trans(priv), &cmd); 115} 116 117/* Set led pattern command */ 118static int iwl_led_cmd(struct iwl_priv *priv, 119 unsigned long on, 120 unsigned long off) 121{ 122 struct iwl_led_cmd led_cmd = { 123 .id = IWL_LED_LINK, 124 .interval = IWL_DEF_LED_INTRVL 125 }; 126 int ret; 127 128 if (!test_bit(STATUS_READY, &priv->shrd->status)) 129 return -EBUSY; 130 131 if (priv->blink_on == on && priv->blink_off == off) 132 return 0; 133 134 if (off == 0) { 135 /* led is SOLID_ON */ 136 on = IWL_LED_SOLID; 137 } 138 139 IWL_DEBUG_LED(priv, "Led blink time compensation=%u\n", 140 cfg(priv)->base_params->led_compensation); 141 led_cmd.on = iwl_blink_compensation(priv, on, 142 cfg(priv)->base_params->led_compensation); 143 led_cmd.off = iwl_blink_compensation(priv, off, 144 cfg(priv)->base_params->led_compensation); 145 146 ret = iwl_send_led_cmd(priv, &led_cmd); 147 if (!ret) { 148 priv->blink_on = on; 149 priv->blink_off = off; 150 } 151 return ret; 152} 153 154static void iwl_led_brightness_set(struct led_classdev *led_cdev, 155 enum led_brightness brightness) 156{ 157 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led); 158 unsigned long on = 0; 159 160 if (brightness > 0) 161 on = IWL_LED_SOLID; 162 163 iwl_led_cmd(priv, on, 0); 164} 165 166static int iwl_led_blink_set(struct led_classdev *led_cdev, 167 unsigned long *delay_on, 168 unsigned long *delay_off) 169{ 170 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led); 171 172 return iwl_led_cmd(priv, *delay_on, *delay_off); 173} 174 175void iwl_leds_init(struct iwl_priv *priv) 176{ 177 int mode = iwlagn_mod_params.led_mode; 178 int ret; 179 180 if (mode == IWL_LED_DEFAULT) 181 mode = cfg(priv)->led_mode; 182 183 priv->led.name = kasprintf(GFP_KERNEL, "%s-led", 184 wiphy_name(priv->hw->wiphy)); 185 priv->led.brightness_set = iwl_led_brightness_set; 186 priv->led.blink_set = iwl_led_blink_set; 187 priv->led.max_brightness = 1; 188 189 switch (mode) { 190 case IWL_LED_DEFAULT: 191 WARN_ON(1); 192 break; 193 case IWL_LED_BLINK: 194 priv->led.default_trigger = 195 ieee80211_create_tpt_led_trigger(priv->hw, 196 IEEE80211_TPT_LEDTRIG_FL_CONNECTED, 197 iwl_blink, ARRAY_SIZE(iwl_blink)); 198 break; 199 case IWL_LED_RF_STATE: 200 priv->led.default_trigger = 201 ieee80211_get_radio_led_name(priv->hw); 202 break; 203 } 204 205 ret = led_classdev_register(bus(priv)->dev, &priv->led); 206 if (ret) { 207 kfree(priv->led.name); 208 return; 209 } 210 211 priv->led_registered = true; 212} 213 214void iwl_leds_exit(struct iwl_priv *priv) 215{ 216 if (!priv->led_registered) 217 return; 218 219 led_classdev_unregister(&priv->led); 220 kfree(priv->led.name); 221} 222