cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/wireless/intel/iwlwifi/dvm/led.c

/******************************************************************************
 *
 * Copyright(c) 2003 - 2014 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 <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <net/mac80211.h>
#include <linux/etherdevice.h>
#include <asm/unaligned.h>
#include "iwl-io.h"
#include "iwl-trans.h"
#include "iwl-modparams.h"
#include "dev.h"
#include "agn.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->trans, CSR_LED_REG, CSR_LED_REG_TURN_ON); }

Contributors

PersonTokensPropCommitsCommitProp
Wey-Yi Guy1885.71%133.33%
Emmanuel Grumbach29.52%133.33%
Eytan Lifshitz14.76%133.33%
Total21100.00%3100.00%

/* * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Wey-Yi Guy50100.00%1100.00%
Total50100.00%1100.00%


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, }; u32 reg; reg = iwl_read32(priv->trans, CSR_LED_REG); if (reg != (reg & CSR_LED_BSM_CTRL_MSK)) iwl_write32(priv->trans, CSR_LED_REG, reg & CSR_LED_BSM_CTRL_MSK); return iwl_dvm_send_cmd(priv, &cmd); }

Contributors

PersonTokensPropCommitsCommitProp
Wey-Yi Guy8588.54%120.00%
Emmanuel Grumbach66.25%240.00%
Johannes Berg55.21%240.00%
Total96100.00%5100.00%

/* 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; } 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; }

Contributors

PersonTokensPropCommitsCommitProp
Wey-Yi Guy10265.81%545.45%
Mohamed Abbas4227.10%19.09%
Emmanuel Grumbach42.58%19.09%
Tomas Winkler31.94%19.09%
Don Fry21.29%19.09%
Abhijeet Kolekar10.65%19.09%
Johannes Berg10.65%19.09%
Total155100.00%11100.00%


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; unsigned long off = 0; if (brightness > 0) on = IWL_LED_SOLID; else off = IWL_LED_SOLID; iwl_led_cmd(priv, on, off); }

Contributors

PersonTokensPropCommitsCommitProp
Wey-Yi Guy4263.64%120.00%
Hubert Tarasiuk1218.18%120.00%
Mohamed Abbas913.64%120.00%
Johannes Berg23.03%120.00%
Tomas Winkler11.52%120.00%
Total66100.00%5100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Wey-Yi Guy3572.92%120.00%
Ester Kummer918.75%120.00%
Johannes Berg24.17%240.00%
Tomas Winkler24.17%120.00%
Total48100.00%5100.00%


void iwl_leds_init(struct iwl_priv *priv) { int mode = iwlwifi_mod_params.led_mode; int ret; if (mode == IWL_LED_DISABLE) { IWL_INFO(priv, "Led disabled\n"); return; } 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->trans->dev, &priv->led); if (ret) { kfree(priv->led.name); return; } priv->led_registered = true; }

Contributors

PersonTokensPropCommitsCommitProp
Wey-Yi Guy11258.33%325.00%
Mohamed Abbas5327.60%18.33%
Johannes Berg178.85%216.67%
Emmanuel Grumbach52.60%325.00%
Sven Wegener31.56%18.33%
Don Fry21.04%216.67%
Total192100.00%12100.00%


void iwl_leds_exit(struct iwl_priv *priv) { if (!priv->led_registered) return; led_classdev_unregister(&priv->led); kfree(priv->led.name); }

Contributors

PersonTokensPropCommitsCommitProp
Wey-Yi Guy2674.29%266.67%
Mohamed Abbas925.71%133.33%
Total35100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Wey-Yi Guy59368.00%1031.25%
Mohamed Abbas18320.99%13.12%
Johannes Berg343.90%618.75%
Emmanuel Grumbach202.29%618.75%
Hubert Tarasiuk121.38%13.12%
Tomas Winkler121.38%26.25%
Ester Kummer91.03%13.12%
Don Fry40.46%26.25%
Sven Wegener30.34%13.12%
Abhijeet Kolekar10.11%13.12%
Eytan Lifshitz10.11%13.12%
Total872100.00%32100.00%
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