| /****************************************************************************** |
| * |
| * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| * |
| * The full GNU General Public License is included in this distribution in the |
| * file called LICENSE. |
| * |
| * Contact Information: |
| * Intel Linux Wireless <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| *****************************************************************************/ |
| |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/skbuff.h> |
| #include <linux/netdevice.h> |
| #include <linux/wireless.h> |
| #include <net/mac80211.h> |
| #include <linux/etherdevice.h> |
| #include <asm/unaligned.h> |
| |
| #include "iwl-dev.h" |
| #include "iwl-core.h" |
| #include "iwl-agn.h" |
| #include "iwl-io.h" |
| #include "iwl-trans.h" |
| |
| /* Throughput OFF time(ms) ON time (ms) |
| * >300 25 25 |
| * >200 to 300 40 40 |
| * >100 to 200 55 55 |
| * >70 to 100 65 65 |
| * >50 to 70 75 75 |
| * >20 to 50 85 85 |
| * >10 to 20 95 95 |
| * >5 to 10 110 110 |
| * >1 to 5 130 130 |
| * >0 to 1 167 167 |
| * <=0 SOLID ON |
| */ |
| static const struct ieee80211_tpt_blink iwl_blink[] = { |
| { .throughput = 0, .blink_time = 334 }, |
| { .throughput = 1 * 1024 - 1, .blink_time = 260 }, |
| { .throughput = 5 * 1024 - 1, .blink_time = 220 }, |
| { .throughput = 10 * 1024 - 1, .blink_time = 190 }, |
| { .throughput = 20 * 1024 - 1, .blink_time = 170 }, |
| { .throughput = 50 * 1024 - 1, .blink_time = 150 }, |
| { .throughput = 70 * 1024 - 1, .blink_time = 130 }, |
| { .throughput = 100 * 1024 - 1, .blink_time = 110 }, |
| { .throughput = 200 * 1024 - 1, .blink_time = 80 }, |
| { .throughput = 300 * 1024 - 1, .blink_time = 50 }, |
| }; |
| |
| /* Set led register off */ |
| void iwlagn_led_enable(struct iwl_priv *priv) |
| { |
| iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_ON); |
| } |
| |
| /* |
| * Adjust led blink rate to compensate on a MAC Clock difference on every HW |
| * Led blink rate analysis showed an average deviation of 20% on 5000 series |
| * and up. |
| * Need to compensate on the led on/off time per HW according to the deviation |
| * to achieve the desired led frequency |
| * The calculation is: (100-averageDeviation)/100 * blinkTime |
| * For code efficiency the calculation will be: |
| * compensation = (100 - averageDeviation) * 64 / 100 |
| * NewBlinkTime = (compensation * BlinkTime) / 64 |
| */ |
| static inline u8 iwl_blink_compensation(struct iwl_priv *priv, |
| u8 time, u16 compensation) |
| { |
| if (!compensation) { |
| IWL_ERR(priv, "undefined blink compensation: " |
| "use pre-defined blinking time\n"); |
| return time; |
| } |
| |
| return (u8)((time * compensation) >> 6); |
| } |
| |
| static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd) |
| { |
| struct iwl_host_cmd cmd = { |
| .id = REPLY_LEDS_CMD, |
| .len = { sizeof(struct iwl_led_cmd), }, |
| .data = { led_cmd, }, |
| .flags = CMD_ASYNC, |
| .callback = NULL, |
| }; |
| u32 reg; |
| |
| reg = iwl_read32(priv, CSR_LED_REG); |
| if (reg != (reg & CSR_LED_BSM_CTRL_MSK)) |
| iwl_write32(priv, CSR_LED_REG, reg & CSR_LED_BSM_CTRL_MSK); |
| |
| return trans_send_cmd(priv, &cmd); |
| } |
| |
| /* Set led pattern command */ |
| static int iwl_led_cmd(struct iwl_priv *priv, |
| unsigned long on, |
| unsigned long off) |
| { |
| struct iwl_led_cmd led_cmd = { |
| .id = IWL_LED_LINK, |
| .interval = IWL_DEF_LED_INTRVL |
| }; |
| int ret; |
| |
| if (!test_bit(STATUS_READY, &priv->status)) |
| return -EBUSY; |
| |
| if (priv->blink_on == on && priv->blink_off == off) |
| return 0; |
| |
| if (off == 0) { |
| /* led is SOLID_ON */ |
| on = IWL_LED_SOLID; |
| } |
| |
| IWL_DEBUG_LED(priv, "Led blink time compensation=%u\n", |
| priv->cfg->base_params->led_compensation); |
| led_cmd.on = iwl_blink_compensation(priv, on, |
| priv->cfg->base_params->led_compensation); |
| led_cmd.off = iwl_blink_compensation(priv, off, |
| priv->cfg->base_params->led_compensation); |
| |
| ret = iwl_send_led_cmd(priv, &led_cmd); |
| if (!ret) { |
| priv->blink_on = on; |
| priv->blink_off = off; |
| } |
| return ret; |
| } |
| |
| static void iwl_led_brightness_set(struct led_classdev *led_cdev, |
| enum led_brightness brightness) |
| { |
| struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led); |
| unsigned long on = 0; |
| |
| if (brightness > 0) |
| on = IWL_LED_SOLID; |
| |
| iwl_led_cmd(priv, on, 0); |
| } |
| |
| static int iwl_led_blink_set(struct led_classdev *led_cdev, |
| unsigned long *delay_on, |
| unsigned long *delay_off) |
| { |
| struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led); |
| |
| return iwl_led_cmd(priv, *delay_on, *delay_off); |
| } |
| |
| void iwl_leds_init(struct iwl_priv *priv) |
| { |
| int mode = iwlagn_mod_params.led_mode; |
| int ret; |
| |
| if (mode == IWL_LED_DEFAULT) |
| mode = priv->cfg->led_mode; |
| |
| priv->led.name = kasprintf(GFP_KERNEL, "%s-led", |
| wiphy_name(priv->hw->wiphy)); |
| priv->led.brightness_set = iwl_led_brightness_set; |
| priv->led.blink_set = iwl_led_blink_set; |
| priv->led.max_brightness = 1; |
| |
| switch (mode) { |
| case IWL_LED_DEFAULT: |
| WARN_ON(1); |
| break; |
| case IWL_LED_BLINK: |
| priv->led.default_trigger = |
| ieee80211_create_tpt_led_trigger(priv->hw, |
| IEEE80211_TPT_LEDTRIG_FL_CONNECTED, |
| iwl_blink, ARRAY_SIZE(iwl_blink)); |
| break; |
| case IWL_LED_RF_STATE: |
| priv->led.default_trigger = |
| ieee80211_get_radio_led_name(priv->hw); |
| break; |
| } |
| |
| ret = led_classdev_register(priv->bus.dev, |
| &priv->led); |
| if (ret) { |
| kfree(priv->led.name); |
| return; |
| } |
| |
| priv->led_registered = true; |
| } |
| |
| void iwl_leds_exit(struct iwl_priv *priv) |
| { |
| if (!priv->led_registered) |
| return; |
| |
| led_classdev_unregister(&priv->led); |
| kfree(priv->led.name); |
| } |