| /****************************************************************************** |
| * |
| * 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 |
| * |
| *****************************************************************************/ |
| |
| #ifdef CONFIG_IWLWIFI_LEDS |
| |
| #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-commands.h" |
| #include "iwl-3945.h" |
| #include "iwl-core.h" |
| #include "iwl-dev.h" |
| |
| |
| static const struct { |
| u16 brightness; |
| 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) |
| |
| static int iwl3945_led_cmd_callback(struct iwl_priv *priv, |
| struct iwl_cmd *cmd, |
| struct sk_buff *skb) |
| { |
| return 1; |
| } |
| |
| static inline int iwl3945_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 = iwl3945_led_cmd_callback, |
| }; |
| |
| return iwl_send_cmd(priv, &cmd); |
| } |
| |
| |
| |
| /* Set led on command */ |
| static int iwl3945_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 on command */ |
| static int iwl3945_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 */ |
| static int iwl3945_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); |
| } |
| |
| /* |
| * brightness call back function for Tx/Rx LED |
| */ |
| static int iwl3945_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 iwl3945_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; |
| |
| switch (brightness) { |
| case LED_FULL: |
| if (led->type == IWL_LED_TRG_ASSOC) { |
| priv->allow_blinking = 1; |
| IWL_DEBUG_LED(priv, "MAC is associated\n"); |
| } |
| if (led->led_on) |
| led->led_on(priv, IWL_LED_LINK); |
| break; |
| case LED_OFF: |
| if (led->type == IWL_LED_TRG_ASSOC) { |
| priv->allow_blinking = 0; |
| IWL_DEBUG_LED(priv, "MAC is disassociated\n"); |
| } |
| if (led->led_off) |
| led->led_off(priv, IWL_LED_LINK); |
| break; |
| default: |
| if (led->led_pattern) { |
| int idx = iwl3945_brightness_to_idx(brightness); |
| led->led_pattern(priv, IWL_LED_LINK, idx); |
| } |
| break; |
| } |
| } |
| |
| |
| |
| /* |
| * Register led class with the system |
| */ |
| static int iwl3945_led_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 = iwl3945_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 inline u8 get_blink_rate(struct iwl_priv *priv) |
| { |
| int index; |
| u64 current_tpt = priv->rxtxpackets; |
| s64 tpt = current_tpt - priv->led_tpt; |
| |
| if (tpt < 0) |
| tpt = -tpt; |
| priv->led_tpt = current_tpt; |
| |
| if (!priv->allow_blinking) |
| index = IWL_MAX_BLINK_TBL; |
| else |
| for (index = 0; index < IWL_MAX_BLINK_TBL; index++) |
| if (tpt > (blink_tbl[index].brightness * IWL_1MB_RATE)) |
| break; |
| return index; |
| } |
| |
| static inline int is_rf_kill(struct iwl_priv *priv) |
| { |
| return test_bit(STATUS_RF_KILL_HW, &priv->status) || |
| test_bit(STATUS_RF_KILL_SW, &priv->status); |
| } |
| |
| /* |
| * 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 iwl3945_led_background(struct iwl_priv *priv) |
| { |
| u8 blink_idx; |
| |
| if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { |
| priv->last_blink_time = 0; |
| return; |
| } |
| if (is_rf_kill(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; |
| iwl3945_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 = get_blink_rate(priv); |
| |
| /* call only if blink rate change */ |
| if (blink_idx != priv->last_blink_rate) |
| iwl3945_led_pattern(priv, IWL_LED_LINK, blink_idx); |
| |
| priv->last_blink_time = jiffies; |
| priv->last_blink_rate = blink_idx; |
| priv->rxtxpackets = 0; |
| } |
| |
| |
| /* Register all led handler */ |
| int iwl3945_led_register(struct iwl_priv *priv) |
| { |
| char *trigger; |
| int ret; |
| |
| priv->last_blink_rate = 0; |
| priv->rxtxpackets = 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 = iwl3945_led_on; |
| priv->led[IWL_LED_TRG_RADIO].led_off = iwl3945_led_off; |
| priv->led[IWL_LED_TRG_RADIO].led_pattern = NULL; |
| |
| ret = iwl3945_led_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 = iwl3945_led_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 = iwl3945_led_on; |
| priv->led[IWL_LED_TRG_ASSOC].led_off = iwl3945_led_on; |
| 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 = iwl3945_led_register_led(priv, |
| &priv->led[IWL_LED_TRG_RX], |
| IWL_LED_TRG_RX, 0, trigger); |
| |
| priv->led[IWL_LED_TRG_RX].led_on = iwl3945_led_associated; |
| priv->led[IWL_LED_TRG_RX].led_off = iwl3945_led_associated; |
| priv->led[IWL_LED_TRG_RX].led_pattern = iwl3945_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 = iwl3945_led_register_led(priv, |
| &priv->led[IWL_LED_TRG_TX], |
| IWL_LED_TRG_TX, 0, trigger); |
| |
| priv->led[IWL_LED_TRG_TX].led_on = iwl3945_led_associated; |
| priv->led[IWL_LED_TRG_TX].led_off = iwl3945_led_associated; |
| priv->led[IWL_LED_TRG_TX].led_pattern = iwl3945_led_pattern; |
| |
| if (ret) |
| goto exit_fail; |
| |
| return 0; |
| |
| exit_fail: |
| iwl3945_led_unregister(priv); |
| return ret; |
| } |
| |
| |
| /* unregister led class */ |
| static void iwl3945_led_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 iwl3945_led_unregister(struct iwl_priv *priv) |
| { |
| iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_ASSOC], 0); |
| iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_RX], 0); |
| iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_TX], 0); |
| iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_RADIO], 1); |
| } |
| |
| #endif |