drivers/net/wireless/iwlwifi/iwl-led.c - maze/linux - Git at Google

 /******************************************************************************
  *
  * 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->trans, &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);
 }
	/******************************************************************************
	*
	* 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->trans, &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);
	}