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linux/drivers/net/wireless/iwlwifi/iwl-led.c

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/******************************************************************************
*
* Copyright(c) 2003 - 2009 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 <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-io.h"
#ifdef CONFIG_IWLWIFI_DEBUG
static const char *led_type_str[] = {
__stringify(IWL_LED_TRG_TX),
__stringify(IWL_LED_TRG_RX),
__stringify(IWL_LED_TRG_ASSOC),
__stringify(IWL_LED_TRG_RADIO),
NULL
};
#endif /* CONFIG_IWLWIFI_DEBUG */
static const struct {
u16 tpt;
u8 on_time;
u8 off_time;
} blink_tbl[] =
{
{300, 25, 25},
{200, 40, 40},
{100, 55, 55},
{70, 65, 65},
{50, 75, 75},
{20, 85, 85},
{15, 95, 95 },
{10, 110, 110},
{5, 130, 130},
{0, 167, 167},
/* SOLID_ON */
{-1, IWL_LED_SOLID, 0}
};
#define IWL_1MB_RATE (128 * 1024)
#define IWL_LED_THRESHOLD (16)
#define IWL_MAX_BLINK_TBL (ARRAY_SIZE(blink_tbl) - 1) /* exclude SOLID_ON */
#define IWL_SOLID_BLINK_IDX (ARRAY_SIZE(blink_tbl) - 1)
/* [0-256] -> [0..8] FIXME: we need [0..10] */
static inline int iwl_brightness_to_idx(enum led_brightness brightness)
{
return fls(0x000000FF & (u32)brightness);
}
/* Send led command */
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,
.meta.flags = CMD_ASYNC,
.meta.u.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 iwl_send_cmd(priv, &cmd);
}
/* Set led pattern command */
static int iwl4965_led_pattern(struct iwl_priv *priv, int led_id,
unsigned int idx)
{
struct iwl_led_cmd led_cmd = {
.id = led_id,
.interval = IWL_DEF_LED_INTRVL
};
BUG_ON(idx > IWL_MAX_BLINK_TBL);
led_cmd.on = blink_tbl[idx].on_time;
led_cmd.off = blink_tbl[idx].off_time;
return iwl_send_led_cmd(priv, &led_cmd);
}
/* Set led register off */
static int iwl4965_led_on_reg(struct iwl_priv *priv, int led_id)
{
IWL_DEBUG_LED(priv, "led on %d\n", led_id);
iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_ON);
return 0;
}
#if 0
/* Set led on command */
static int iwl4965_led_on(struct iwl_priv *priv, int led_id)
{
struct iwl_led_cmd led_cmd = {
.id = led_id,
.on = IWL_LED_SOLID,
.off = 0,
.interval = IWL_DEF_LED_INTRVL
};
return iwl_send_led_cmd(priv, &led_cmd);
}
/* Set led off command */
int iwl4965_led_off(struct iwl_priv *priv, int led_id)
{
struct iwl_led_cmd led_cmd = {
.id = led_id,
.on = 0,
.off = 0,
.interval = IWL_DEF_LED_INTRVL
};
IWL_DEBUG_LED(priv, "led off %d\n", led_id);
return iwl_send_led_cmd(priv, &led_cmd);
}
#endif
/* Set led register off */
static int iwl4965_led_off_reg(struct iwl_priv *priv, int led_id)
{
IWL_DEBUG_LED(priv, "LED Reg off\n");
iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_OFF);
return 0;
}
/*
* Set led register in case of disassociation according to rfkill state
*/
static int iwl_led_associate(struct iwl_priv *priv, int led_id)
{
IWL_DEBUG_LED(priv, "Associated\n");
priv->allow_blinking = 1;
return iwl4965_led_on_reg(priv, led_id);
}
static int iwl_led_disassociate(struct iwl_priv *priv, int led_id)
{
priv->allow_blinking = 0;
if (iwl_is_rfkill(priv))
iwl4965_led_off_reg(priv, led_id);
else
iwl4965_led_on_reg(priv, led_id);
return 0;
}
/*
* brightness call back function for Tx/Rx LED
*/
static int iwl_led_associated(struct iwl_priv *priv, int led_id)
{
if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
!test_bit(STATUS_READY, &priv->status))
return 0;
/* start counting Tx/Rx bytes */
if (!priv->last_blink_time && priv->allow_blinking)
priv->last_blink_time = jiffies;
return 0;
}
/*
* brightness call back for association and radio
*/
static void iwl_led_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct iwl_led *led = container_of(led_cdev, struct iwl_led, led_dev);
struct iwl_priv *priv = led->priv;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
IWL_DEBUG_LED(priv, "Led type = %s brightness = %d\n",
led_type_str[led->type], brightness);
switch (brightness) {
case LED_FULL:
if (led->led_on)
led->led_on(priv, IWL_LED_LINK);
break;
case LED_OFF:
if (led->led_off)
led->led_off(priv, IWL_LED_LINK);
break;
default:
if (led->led_pattern) {
int idx = iwl_brightness_to_idx(brightness);
led->led_pattern(priv, IWL_LED_LINK, idx);
}
break;
}
}
/*
* Register led class with the system
*/
static int iwl_leds_register_led(struct iwl_priv *priv, struct iwl_led *led,
enum led_type type, u8 set_led,
char *trigger)
{
struct device *device = wiphy_dev(priv->hw->wiphy);
int ret;
led->led_dev.name = led->name;
led->led_dev.brightness_set = iwl_led_brightness_set;
led->led_dev.default_trigger = trigger;
led->priv = priv;
led->type = type;
ret = led_classdev_register(device, &led->led_dev);
if (ret) {
IWL_ERR(priv, "Error: failed to register led handler.\n");
return ret;
}
led->registered = 1;
if (set_led && led->led_on)
led->led_on(priv, IWL_LED_LINK);
return 0;
}
/*
* calculate blink rate according to last 2 sec Tx/Rx activities
*/
static int iwl_get_blink_rate(struct iwl_priv *priv)
{
int i;
u64 current_tpt = priv->tx_stats[2].bytes;
/* FIXME: + priv->rx_stats[2].bytes; */
s64 tpt = current_tpt - priv->led_tpt;
if (tpt < 0) /* wraparound */
tpt = -tpt;
IWL_DEBUG_LED(priv, "tpt %lld current_tpt %llu\n",
(long long)tpt,
(unsigned long long)current_tpt);
priv->led_tpt = current_tpt;
if (!priv->allow_blinking)
i = IWL_MAX_BLINK_TBL;
else
for (i = 0; i < IWL_MAX_BLINK_TBL; i++)
if (tpt > (blink_tbl[i].tpt * IWL_1MB_RATE))
break;
IWL_DEBUG_LED(priv, "LED BLINK IDX=%d\n", i);
return i;
}
/*
* this function called from handler. Since setting Led command can
* happen very frequent we postpone led command to be called from
* REPLY handler so we know ucode is up
*/
void iwl_leds_background(struct iwl_priv *priv)
{
u8 blink_idx;
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
priv->last_blink_time = 0;
return;
}
if (iwl_is_rfkill(priv)) {
priv->last_blink_time = 0;
return;
}
if (!priv->allow_blinking) {
priv->last_blink_time = 0;
if (priv->last_blink_rate != IWL_SOLID_BLINK_IDX) {
priv->last_blink_rate = IWL_SOLID_BLINK_IDX;
iwl4965_led_pattern(priv, IWL_LED_LINK,
IWL_SOLID_BLINK_IDX);
}
return;
}
if (!priv->last_blink_time ||
!time_after(jiffies, priv->last_blink_time +
msecs_to_jiffies(1000)))
return;
blink_idx = iwl_get_blink_rate(priv);
/* call only if blink rate change */
if (blink_idx != priv->last_blink_rate)
iwl4965_led_pattern(priv, IWL_LED_LINK, blink_idx);
priv->last_blink_time = jiffies;
priv->last_blink_rate = blink_idx;
}
EXPORT_SYMBOL(iwl_leds_background);
/* Register all led handler */
int iwl_leds_register(struct iwl_priv *priv)
{
char *trigger;
int ret;
priv->last_blink_rate = 0;
priv->led_tpt = 0;
priv->last_blink_time = 0;
priv->allow_blinking = 0;
trigger = ieee80211_get_radio_led_name(priv->hw);
snprintf(priv->led[IWL_LED_TRG_RADIO].name,
sizeof(priv->led[IWL_LED_TRG_RADIO].name), "iwl-%s::radio",
wiphy_name(priv->hw->wiphy));
priv->led[IWL_LED_TRG_RADIO].led_on = iwl4965_led_on_reg;
priv->led[IWL_LED_TRG_RADIO].led_off = iwl4965_led_off_reg;
priv->led[IWL_LED_TRG_RADIO].led_pattern = NULL;
ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_RADIO],
IWL_LED_TRG_RADIO, 1, trigger);
if (ret)
goto exit_fail;
trigger = ieee80211_get_assoc_led_name(priv->hw);
snprintf(priv->led[IWL_LED_TRG_ASSOC].name,
sizeof(priv->led[IWL_LED_TRG_ASSOC].name), "iwl-%s::assoc",
wiphy_name(priv->hw->wiphy));
ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_ASSOC],
IWL_LED_TRG_ASSOC, 0, trigger);
/* for assoc always turn led on */
priv->led[IWL_LED_TRG_ASSOC].led_on = iwl_led_associate;
priv->led[IWL_LED_TRG_ASSOC].led_off = iwl_led_disassociate;
priv->led[IWL_LED_TRG_ASSOC].led_pattern = NULL;
if (ret)
goto exit_fail;
trigger = ieee80211_get_rx_led_name(priv->hw);
snprintf(priv->led[IWL_LED_TRG_RX].name,
sizeof(priv->led[IWL_LED_TRG_RX].name), "iwl-%s::RX",
wiphy_name(priv->hw->wiphy));
ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_RX],
IWL_LED_TRG_RX, 0, trigger);
priv->led[IWL_LED_TRG_RX].led_on = iwl_led_associated;
priv->led[IWL_LED_TRG_RX].led_off = iwl_led_associated;
priv->led[IWL_LED_TRG_RX].led_pattern = iwl4965_led_pattern;
if (ret)
goto exit_fail;
trigger = ieee80211_get_tx_led_name(priv->hw);
snprintf(priv->led[IWL_LED_TRG_TX].name,
sizeof(priv->led[IWL_LED_TRG_TX].name), "iwl-%s::TX",
wiphy_name(priv->hw->wiphy));
ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_TX],
IWL_LED_TRG_TX, 0, trigger);
priv->led[IWL_LED_TRG_TX].led_on = iwl_led_associated;
priv->led[IWL_LED_TRG_TX].led_off = iwl_led_associated;
priv->led[IWL_LED_TRG_TX].led_pattern = iwl4965_led_pattern;
if (ret)
goto exit_fail;
return 0;
exit_fail:
iwl_leds_unregister(priv);
return ret;
}
EXPORT_SYMBOL(iwl_leds_register);
/* unregister led class */
static void iwl_leds_unregister_led(struct iwl_led *led, u8 set_led)
{
if (!led->registered)
return;
led_classdev_unregister(&led->led_dev);
if (set_led)
led->led_dev.brightness_set(&led->led_dev, LED_OFF);
led->registered = 0;
}
/* Unregister all led handlers */
void iwl_leds_unregister(struct iwl_priv *priv)
{
iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_ASSOC], 0);
iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RX], 0);
iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_TX], 0);
iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RADIO], 1);
}
EXPORT_SYMBOL(iwl_leds_unregister);
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