02f5dac083
Today's implementation allow LED to blink based on the traffic
condition. We introduce an additional LED mode that reflects the RF
state.
The supported LED modes after this are:
IWL_LED_BLINK (current/default) - blink rate based on current Tx/Rx
traffic
IWL_LED_RF_STATE (new) -
LED OFF: No power/RF disabled, the LED is emitting no light
LED ON: Powered/RF enabled, the LED is emitting light
in a stable non-flashing state.
In order to provide the flexibility to support different LED
behavior per user/system preference we add "led_mode" iwlcore module
parameter.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
478 lines
12 KiB
C
478 lines
12 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/dma-mapping.h>
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#include <linux/delay.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/wireless.h>
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#include <net/mac80211.h>
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#include <linux/etherdevice.h>
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#include <asm/unaligned.h>
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#include "iwl-dev.h"
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#include "iwl-core.h"
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#include "iwl-io.h"
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/* default: IWL_LED_BLINK(0) using blinking index table */
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static int led_mode;
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module_param(led_mode, int, S_IRUGO);
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MODULE_PARM_DESC(led_mode, "led mode: 0=blinking, 1=On(RF On)/Off(RF Off), "
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"(default 0)\n");
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#ifdef CONFIG_IWLWIFI_DEBUG
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static const char *led_type_str[] = {
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__stringify(IWL_LED_TRG_TX),
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__stringify(IWL_LED_TRG_RX),
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__stringify(IWL_LED_TRG_ASSOC),
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__stringify(IWL_LED_TRG_RADIO),
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NULL
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};
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#endif /* CONFIG_IWLWIFI_DEBUG */
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static const struct {
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u16 tpt; /* Mb/s */
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u8 on_time;
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u8 off_time;
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} blink_tbl[] =
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{
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{300, 25, 25},
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{200, 40, 40},
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{100, 55, 55},
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{70, 65, 65},
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{50, 75, 75},
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{20, 85, 85},
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{10, 95, 95},
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{5, 110, 110},
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{1, 130, 130},
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{0, 167, 167},
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/* SOLID_ON */
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{-1, IWL_LED_SOLID, 0}
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};
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#define IWL_1MB_RATE (128 * 1024)
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#define IWL_LED_THRESHOLD (16)
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#define IWL_MAX_BLINK_TBL (ARRAY_SIZE(blink_tbl) - 1) /* exclude SOLID_ON */
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#define IWL_SOLID_BLINK_IDX (ARRAY_SIZE(blink_tbl) - 1)
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/*
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* Adjust led blink rate to compensate on a MAC Clock difference on every HW
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* Led blink rate analysis showed an average deviation of 0% on 3945,
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* 5% on 4965 HW and 20% on 5000 series and up.
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* Need to compensate on the led on/off time per HW according to the deviation
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* to achieve the desired led frequency
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* The calculation is: (100-averageDeviation)/100 * blinkTime
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* For code efficiency the calculation will be:
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* compensation = (100 - averageDeviation) * 64 / 100
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* NewBlinkTime = (compensation * BlinkTime) / 64
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*/
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static inline u8 iwl_blink_compensation(struct iwl_priv *priv,
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u8 time, u16 compensation)
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{
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if (!compensation) {
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IWL_ERR(priv, "undefined blink compensation: "
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"use pre-defined blinking time\n");
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return time;
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}
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return (u8)((time * compensation) >> 6);
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}
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/* [0-256] -> [0..8] FIXME: we need [0..10] */
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static inline int iwl_brightness_to_idx(enum led_brightness brightness)
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{
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return fls(0x000000FF & (u32)brightness);
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}
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/* Send led command */
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static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
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{
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struct iwl_host_cmd cmd = {
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.id = REPLY_LEDS_CMD,
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.len = sizeof(struct iwl_led_cmd),
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.data = led_cmd,
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.flags = CMD_ASYNC,
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.callback = NULL,
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};
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u32 reg;
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reg = iwl_read32(priv, CSR_LED_REG);
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if (reg != (reg & CSR_LED_BSM_CTRL_MSK))
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iwl_write32(priv, CSR_LED_REG, reg & CSR_LED_BSM_CTRL_MSK);
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return iwl_send_cmd(priv, &cmd);
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}
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/* Set led pattern command */
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static int iwl_led_pattern(struct iwl_priv *priv, int led_id,
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unsigned int idx)
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{
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struct iwl_led_cmd led_cmd = {
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.id = led_id,
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.interval = IWL_DEF_LED_INTRVL
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};
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BUG_ON(idx > IWL_MAX_BLINK_TBL);
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IWL_DEBUG_LED(priv, "Led blink time compensation= %u\n",
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priv->cfg->led_compensation);
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led_cmd.on =
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iwl_blink_compensation(priv, blink_tbl[idx].on_time,
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priv->cfg->led_compensation);
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led_cmd.off =
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iwl_blink_compensation(priv, blink_tbl[idx].off_time,
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priv->cfg->led_compensation);
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return iwl_send_led_cmd(priv, &led_cmd);
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}
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/* Set led register off */
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static int iwl_led_on_reg(struct iwl_priv *priv, int led_id)
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{
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IWL_DEBUG_LED(priv, "led on %d\n", led_id);
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iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_ON);
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return 0;
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}
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#if 0
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/* Set led on command */
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static int iwl_led_on(struct iwl_priv *priv, int led_id)
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{
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struct iwl_led_cmd led_cmd = {
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.id = led_id,
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.on = IWL_LED_SOLID,
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.off = 0,
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.interval = IWL_DEF_LED_INTRVL
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};
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return iwl_send_led_cmd(priv, &led_cmd);
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}
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/* Set led off command */
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int iwl_led_off(struct iwl_priv *priv, int led_id)
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{
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struct iwl_led_cmd led_cmd = {
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.id = led_id,
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.on = 0,
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.off = 0,
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.interval = IWL_DEF_LED_INTRVL
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};
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IWL_DEBUG_LED(priv, "led off %d\n", led_id);
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return iwl_send_led_cmd(priv, &led_cmd);
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}
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#endif
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/* Set led register off */
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static int iwl_led_off_reg(struct iwl_priv *priv, int led_id)
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{
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IWL_DEBUG_LED(priv, "LED Reg off\n");
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iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_OFF);
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return 0;
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}
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/*
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* Set led register in case of disassociation according to rfkill state
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*/
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static int iwl_led_associate(struct iwl_priv *priv, int led_id)
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{
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IWL_DEBUG_LED(priv, "Associated\n");
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if (led_mode == IWL_LED_BLINK)
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priv->allow_blinking = 1;
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return iwl_led_on_reg(priv, led_id);
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}
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static int iwl_led_disassociate(struct iwl_priv *priv, int led_id)
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{
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priv->allow_blinking = 0;
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return 0;
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}
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/*
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* brightness call back function for Tx/Rx LED
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*/
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static int iwl_led_associated(struct iwl_priv *priv, int led_id)
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{
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if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
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!test_bit(STATUS_READY, &priv->status))
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return 0;
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/* start counting Tx/Rx bytes */
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if (!priv->last_blink_time && priv->allow_blinking)
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priv->last_blink_time = jiffies;
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return 0;
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}
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/*
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* brightness call back for association and radio
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*/
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static void iwl_led_brightness_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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struct iwl_led *led = container_of(led_cdev, struct iwl_led, led_dev);
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struct iwl_priv *priv = led->priv;
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if (test_bit(STATUS_EXIT_PENDING, &priv->status))
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return;
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IWL_DEBUG_LED(priv, "Led type = %s brightness = %d\n",
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led_type_str[led->type], brightness);
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switch (brightness) {
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case LED_FULL:
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if (led->led_on)
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led->led_on(priv, IWL_LED_LINK);
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break;
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case LED_OFF:
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if (led->led_off)
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led->led_off(priv, IWL_LED_LINK);
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break;
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default:
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if (led->led_pattern) {
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int idx = iwl_brightness_to_idx(brightness);
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led->led_pattern(priv, IWL_LED_LINK, idx);
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}
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break;
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}
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}
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/*
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* Register led class with the system
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*/
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static int iwl_leds_register_led(struct iwl_priv *priv, struct iwl_led *led,
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enum led_type type, u8 set_led,
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char *trigger)
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{
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struct device *device = wiphy_dev(priv->hw->wiphy);
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int ret;
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led->led_dev.name = led->name;
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led->led_dev.brightness_set = iwl_led_brightness_set;
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led->led_dev.default_trigger = trigger;
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led->priv = priv;
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led->type = type;
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ret = led_classdev_register(device, &led->led_dev);
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if (ret) {
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IWL_ERR(priv, "Error: failed to register led handler.\n");
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return ret;
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}
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led->registered = 1;
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if (set_led && led->led_on)
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led->led_on(priv, IWL_LED_LINK);
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return 0;
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}
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/*
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* calculate blink rate according to last second Tx/Rx activities
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*/
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static int iwl_get_blink_rate(struct iwl_priv *priv)
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{
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int i;
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/* count both tx and rx traffic to be able to
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* handle traffic in either direction
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*/
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u64 current_tpt = priv->tx_stats.data_bytes +
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priv->rx_stats.data_bytes;
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s64 tpt = current_tpt - priv->led_tpt;
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if (tpt < 0) /* wraparound */
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tpt = -tpt;
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IWL_DEBUG_LED(priv, "tpt %lld current_tpt %llu\n",
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(long long)tpt,
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(unsigned long long)current_tpt);
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priv->led_tpt = current_tpt;
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if (!priv->allow_blinking)
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i = IWL_MAX_BLINK_TBL;
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else
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for (i = 0; i < IWL_MAX_BLINK_TBL; i++)
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if (tpt > (blink_tbl[i].tpt * IWL_1MB_RATE))
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break;
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IWL_DEBUG_LED(priv, "LED BLINK IDX=%d\n", i);
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return i;
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}
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/*
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* this function called from handler. Since setting Led command can
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* happen very frequent we postpone led command to be called from
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* REPLY handler so we know ucode is up
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*/
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void iwl_leds_background(struct iwl_priv *priv)
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{
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u8 blink_idx;
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if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
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priv->last_blink_time = 0;
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return;
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}
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if (iwl_is_rfkill(priv)) {
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priv->last_blink_time = 0;
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return;
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}
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if (!priv->allow_blinking) {
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priv->last_blink_time = 0;
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if (priv->last_blink_rate != IWL_SOLID_BLINK_IDX) {
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priv->last_blink_rate = IWL_SOLID_BLINK_IDX;
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iwl_led_pattern(priv, IWL_LED_LINK,
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IWL_SOLID_BLINK_IDX);
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}
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return;
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}
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if (!priv->last_blink_time ||
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!time_after(jiffies, priv->last_blink_time +
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msecs_to_jiffies(1000)))
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return;
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blink_idx = iwl_get_blink_rate(priv);
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/* call only if blink rate change */
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if (blink_idx != priv->last_blink_rate)
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iwl_led_pattern(priv, IWL_LED_LINK, blink_idx);
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priv->last_blink_time = jiffies;
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priv->last_blink_rate = blink_idx;
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}
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/* Register all led handler */
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int iwl_leds_register(struct iwl_priv *priv)
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{
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char *trigger;
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int ret;
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priv->last_blink_rate = 0;
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priv->led_tpt = 0;
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priv->last_blink_time = 0;
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priv->allow_blinking = 0;
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trigger = ieee80211_get_radio_led_name(priv->hw);
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snprintf(priv->led[IWL_LED_TRG_RADIO].name,
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sizeof(priv->led[IWL_LED_TRG_RADIO].name), "iwl-%s::radio",
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wiphy_name(priv->hw->wiphy));
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priv->led[IWL_LED_TRG_RADIO].led_on = iwl_led_on_reg;
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priv->led[IWL_LED_TRG_RADIO].led_off = iwl_led_off_reg;
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priv->led[IWL_LED_TRG_RADIO].led_pattern = NULL;
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ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_RADIO],
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IWL_LED_TRG_RADIO, 1, trigger);
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if (ret)
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goto exit_fail;
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trigger = ieee80211_get_assoc_led_name(priv->hw);
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snprintf(priv->led[IWL_LED_TRG_ASSOC].name,
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sizeof(priv->led[IWL_LED_TRG_ASSOC].name), "iwl-%s::assoc",
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wiphy_name(priv->hw->wiphy));
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ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_ASSOC],
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IWL_LED_TRG_ASSOC, 0, trigger);
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/* for assoc always turn led on */
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priv->led[IWL_LED_TRG_ASSOC].led_on = iwl_led_associate;
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priv->led[IWL_LED_TRG_ASSOC].led_off = iwl_led_disassociate;
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priv->led[IWL_LED_TRG_ASSOC].led_pattern = NULL;
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if (ret)
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goto exit_fail;
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trigger = ieee80211_get_rx_led_name(priv->hw);
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snprintf(priv->led[IWL_LED_TRG_RX].name,
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sizeof(priv->led[IWL_LED_TRG_RX].name), "iwl-%s::RX",
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wiphy_name(priv->hw->wiphy));
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ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_RX],
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IWL_LED_TRG_RX, 0, trigger);
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priv->led[IWL_LED_TRG_RX].led_on = iwl_led_associated;
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priv->led[IWL_LED_TRG_RX].led_off = iwl_led_associated;
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priv->led[IWL_LED_TRG_RX].led_pattern = iwl_led_pattern;
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if (ret)
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goto exit_fail;
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trigger = ieee80211_get_tx_led_name(priv->hw);
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snprintf(priv->led[IWL_LED_TRG_TX].name,
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sizeof(priv->led[IWL_LED_TRG_TX].name), "iwl-%s::TX",
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wiphy_name(priv->hw->wiphy));
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ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_TX],
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IWL_LED_TRG_TX, 0, trigger);
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priv->led[IWL_LED_TRG_TX].led_on = iwl_led_associated;
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priv->led[IWL_LED_TRG_TX].led_off = iwl_led_associated;
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priv->led[IWL_LED_TRG_TX].led_pattern = iwl_led_pattern;
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if (ret)
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goto exit_fail;
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return 0;
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exit_fail:
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iwl_leds_unregister(priv);
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return ret;
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}
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EXPORT_SYMBOL(iwl_leds_register);
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/* unregister led class */
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static void iwl_leds_unregister_led(struct iwl_led *led, u8 set_led)
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{
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if (!led->registered)
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return;
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led_classdev_unregister(&led->led_dev);
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if (set_led)
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led->led_dev.brightness_set(&led->led_dev, LED_OFF);
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led->registered = 0;
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}
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/* Unregister all led handlers */
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void iwl_leds_unregister(struct iwl_priv *priv)
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{
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iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_ASSOC], 0);
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iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RX], 0);
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iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_TX], 0);
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iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RADIO], 1);
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}
|
|
EXPORT_SYMBOL(iwl_leds_unregister);
|
|
|