/******************************************************************************
*
* 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/pci.h>
#include <linux/dma-mapping.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-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
/* default: IL_LED_BLINK(0) using blinking index table */
static int led_mode;
module_param(led_mode, int, S_IRUGO);
MODULE_PARM_DESC(led_mode, "0=system default, "
"1=On(RF On)/Off(RF Off), 2=blinking");
/* 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 il_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 },
};
/*
* Adjust led blink rate to compensate on a MAC Clock difference on every HW
* Led blink rate analysis showed an average deviation of 0% on 3945,
* 5% on 4965 HW.
* 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 il_blink_compensation(struct il_priv *il,
u8 time, u16 compensation)
{
if (!compensation) {
IL_ERR("undefined blink compensation: "
"use pre-defined blinking time\n");
return time;
}
return (u8)((time * compensation) >> 6);
}
/* Set led pattern command */
static int il_led_cmd(struct il_priv *il,
unsigned long on,
unsigned long off)
{
struct il_led_cmd led_cmd = {
.id = IL_LED_LINK,
.interval = IL_DEF_LED_INTRVL
};
int ret;
if (!test_bit(STATUS_READY, &il->status))
return -EBUSY;
if (il->blink_on == on && il->blink_off == off)
return 0;
if (off == 0) {
/* led is SOLID_ON */
on = IL_LED_SOLID;
}
D_LED("Led blink time compensation=%u\n",
il->cfg->base_params->led_compensation);
led_cmd.on = il_blink_compensation(il, on,
il->cfg->base_params->led_compensation);
led_cmd.off = il_blink_compensation(il, off,
il->cfg->base_params->led_compensation);
ret = il->cfg->ops->led->cmd(il, &led_cmd);
if (!ret) {
il->blink_on = on;
il->blink_off = off;
}
return ret;
}
static void il_led_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct il_priv *il = container_of(led_cdev, struct il_priv, led);
unsigned long on = 0;
if (brightness > 0)
on = IL_LED_SOLID;
il_led_cmd(il, on, 0);
}
static int il_led_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct il_priv *il = container_of(led_cdev, struct il_priv, led);
return il_led_cmd(il, *delay_on, *delay_off);
}
void il_leds_init(struct il_priv *il)
{
int mode = led_mode;
int ret;
if (mode == IL_LED_DEFAULT)
mode = il->cfg->led_mode;
il->led.name = kasprintf(GFP_KERNEL, "%s-led",
wiphy_name(il->hw->wiphy));
il->led.brightness_set = il_led_brightness_set;
il->led.blink_set = il_led_blink_set;
il->led.max_brightness = 1;
switch (mode) {
case IL_LED_DEFAULT:
WARN_ON(1);
break;
case IL_LED_BLINK:
il->led.default_trigger =
ieee80211_create_tpt_led_trigger(il->hw,
IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
il_blink, ARRAY_SIZE(il_blink));
break;
case IL_LED_RF_STATE:
il->led.default_trigger =
ieee80211_get_radio_led_name(il->hw);
break;
}
ret = led_classdev_register(&il->pci_dev->dev, &il->led);
if (ret) {
kfree(il->led.name);
return;
}
il->led_registered = true;
}
EXPORT_SYMBOL(il_leds_init);
void il_leds_exit(struct il_priv *il)
{
if (!il->led_registered)
return;
led_classdev_unregister(&il->led);
kfree(il->led.name);
}
EXPORT_SYMBOL(il_leds_exit);
