drivers/net/wireless/iwlwifi/iwl-3945-led.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  *  Intel Linux Wireless <ilw@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #ifdef CONFIG_IWLWIFI_LEDS
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/pci.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/wireless.h>
  38 #include <net/mac80211.h>
  39 #include <linux/etherdevice.h>
  40 #include <asm/unaligned.h>
  41
  42 #include "iwl-commands.h"
  43 #include "iwl-3945.h"
  44 #include "iwl-core.h"
  45 #include "iwl-dev.h"
  46
  47 #ifdef CONFIG_IWLWIFI_DEBUG
  48 static const char *led_type_str[] = {
  49         __stringify(IWL_LED_TRG_TX),
  50         __stringify(IWL_LED_TRG_RX),
  51         __stringify(IWL_LED_TRG_ASSOC),
  52         __stringify(IWL_LED_TRG_RADIO),
  53         NULL
  54 };
  55 #endif /* CONFIG_IWLWIFI_DEBUG */
  56
  57 static const struct {
  58         u16 brightness;
  59         u8 on_time;
  60         u8 off_time;
  61 } blink_tbl[] =
  62 {
  63         {300, 25, 25},
  64         {200, 40, 40},
  65         {100, 55, 55},
  66         {70, 65, 65},
  67         {50, 75, 75},
  68         {20, 85, 85},
  69         {15, 95, 95 },
  70         {10, 110, 110},
  71         {5, 130, 130},
  72         {0, 167, 167},
  73         /* SOLID_ON */
  74         {-1, IWL_LED_SOLID, 0}
  75 };
  76
  77 #define IWL_1MB_RATE (128 * 1024)
  78 #define IWL_LED_THRESHOLD (16)
  79 #define IWL_MAX_BLINK_TBL (ARRAY_SIZE(blink_tbl) - 1) /*Exclude Solid on*/
  80 #define IWL_SOLID_BLINK_IDX (ARRAY_SIZE(blink_tbl) - 1)
  81
  82 static void iwl3945_led_cmd_callback(struct iwl_priv *priv,
  83                                      struct iwl_device_cmd *cmd,
  84                                      struct sk_buff *skb)
  85 {
  86 }
  87
  88 static inline int iwl3945_brightness_to_idx(enum led_brightness brightness)
  89 {
  90         return fls(0x000000FF & (u32)brightness);
  91 }
  92
  93 /* Send led command */
  94 static int iwl_send_led_cmd(struct iwl_priv *priv,
  95                             struct iwl_led_cmd *led_cmd)
  96 {
  97         struct iwl_host_cmd cmd = {
  98                 .id = REPLY_LEDS_CMD,
  99                 .len = sizeof(struct iwl_led_cmd),
 100                 .data = led_cmd,
 101                 .flags = CMD_ASYNC,
 102                 .callback = iwl3945_led_cmd_callback,
 103         };
 104
 105         return iwl_send_cmd(priv, &cmd);
 106 }
 107
 108
 109
 110 /* Set led on command */
 111 static int iwl3945_led_pattern(struct iwl_priv *priv, int led_id,
 112                                unsigned int idx)
 113 {
 114         struct iwl_led_cmd led_cmd = {
 115                 .id = led_id,
 116                 .interval = IWL_DEF_LED_INTRVL
 117         };
 118
 119         BUG_ON(idx > IWL_MAX_BLINK_TBL);
 120
 121         led_cmd.on = blink_tbl[idx].on_time;
 122         led_cmd.off = blink_tbl[idx].off_time;
 123
 124         return iwl_send_led_cmd(priv, &led_cmd);
 125 }
 126
 127
 128 /* Set led on command */
 129 static int iwl3945_led_on(struct iwl_priv *priv, int led_id)
 130 {
 131         struct iwl_led_cmd led_cmd = {
 132                 .id = led_id,
 133                 .on = IWL_LED_SOLID,
 134                 .off = 0,
 135                 .interval = IWL_DEF_LED_INTRVL
 136         };
 137         return iwl_send_led_cmd(priv, &led_cmd);
 138 }
 139
 140 /* Set led off command */
 141 static int iwl3945_led_off(struct iwl_priv *priv, int led_id)
 142 {
 143         struct iwl_led_cmd led_cmd = {
 144                 .id = led_id,
 145                 .on = 0,
 146                 .off = 0,
 147                 .interval = IWL_DEF_LED_INTRVL
 148         };
 149         IWL_DEBUG_LED(priv, "led off %d\n", led_id);
 150         return iwl_send_led_cmd(priv, &led_cmd);
 151 }
 152
 153 /*
 154  *  Set led on in case of association
 155  *  */
 156 static int iwl3945_led_associate(struct iwl_priv *priv, int led_id)
 157 {
 158         IWL_DEBUG_LED(priv, "Associated\n");
 159
 160         priv->allow_blinking = 1;
 161         return iwl3945_led_on(priv, led_id);
 162 }
 163 /* Set Led off in case of disassociation */
 164 static int iwl3945_led_disassociate(struct iwl_priv *priv, int led_id)
 165 {
 166         IWL_DEBUG_LED(priv, "Disassociated\n");
 167
 168         priv->allow_blinking = 0;
 169
 170         return 0;
 171 }
 172
 173 /*
 174  * brightness call back function for Tx/Rx LED
 175  */
 176 static int iwl3945_led_associated(struct iwl_priv *priv, int led_id)
 177 {
 178         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 179             !test_bit(STATUS_READY, &priv->status))
 180                 return 0;
 181
 182
 183         /* start counting Tx/Rx bytes */
 184         if (!priv->last_blink_time && priv->allow_blinking)
 185                 priv->last_blink_time = jiffies;
 186         return 0;
 187 }
 188
 189 /*
 190  * brightness call back for association and radio
 191  */
 192 static void iwl3945_led_brightness_set(struct led_classdev *led_cdev,
 193                                 enum led_brightness brightness)
 194 {
 195         struct iwl_led *led = container_of(led_cdev,
 196                                            struct iwl_led, led_dev);
 197         struct iwl_priv *priv = led->priv;
 198
 199         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 200                 return;
 201
 202         IWL_DEBUG_LED(priv, "Led type = %s brightness = %d\n",
 203                         led_type_str[led->type], brightness);
 204
 205         switch (brightness) {
 206         case LED_FULL:
 207                 if (led->led_on)
 208                         led->led_on(priv, IWL_LED_LINK);
 209                 break;
 210         case LED_OFF:
 211                 if (led->led_off)
 212                         led->led_off(priv, IWL_LED_LINK);
 213                 break;
 214         default:
 215                 if (led->led_pattern) {
 216                         int idx = iwl3945_brightness_to_idx(brightness);
 217                         led->led_pattern(priv, IWL_LED_LINK, idx);
 218                 }
 219                 break;
 220         }
 221 }
 222
 223 /*
 224  * Register led class with the system
 225  */
 226 static int iwl3945_led_register_led(struct iwl_priv *priv,
 227                                    struct iwl_led *led,
 228                                    enum led_type type, u8 set_led,
 229                                    char *trigger)
 230 {
 231         struct device *device = wiphy_dev(priv->hw->wiphy);
 232         int ret;
 233
 234         led->led_dev.name = led->name;
 235         led->led_dev.brightness_set = iwl3945_led_brightness_set;
 236         led->led_dev.default_trigger = trigger;
 237
 238         led->priv = priv;
 239         led->type = type;
 240
 241         ret = led_classdev_register(device, &led->led_dev);
 242         if (ret) {
 243                 IWL_ERR(priv, "Error: failed to register led handler.\n");
 244                 return ret;
 245         }
 246
 247         led->registered = 1;
 248
 249         if (set_led && led->led_on)
 250                 led->led_on(priv, IWL_LED_LINK);
 251         return 0;
 252 }
 253
 254
 255 /*
 256  * calculate blink rate according to last 2 sec Tx/Rx activities
 257  */
 258 static inline u8 get_blink_rate(struct iwl_priv *priv)
 259 {
 260         int index;
 261         s64 tpt = priv->rxtxpackets;
 262
 263         if (tpt < 0)
 264                 tpt = -tpt;
 265
 266         IWL_DEBUG_LED(priv, "tpt %lld \n", (long long)tpt);
 267
 268         if (!priv->allow_blinking)
 269                 index = IWL_MAX_BLINK_TBL;
 270         else
 271                 for (index = 0; index < IWL_MAX_BLINK_TBL; index++)
 272                         if (tpt > (blink_tbl[index].brightness * IWL_1MB_RATE))
 273                                 break;
 274
 275         IWL_DEBUG_LED(priv, "LED BLINK IDX=%d\n", index);
 276         return index;
 277 }
 278
 279 /*
 280  * this function called from handler. Since setting Led command can
 281  * happen very frequent we postpone led command to be called from
 282  * REPLY handler so we know ucode is up
 283  */
 284 void iwl3945_led_background(struct iwl_priv *priv)
 285 {
 286         u8 blink_idx;
 287
 288         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 289                 priv->last_blink_time = 0;
 290                 return;
 291         }
 292         if (iwl_is_rfkill(priv)) {
 293                 priv->last_blink_time = 0;
 294                 return;
 295         }
 296
 297         if (!priv->allow_blinking) {
 298                 priv->last_blink_time = 0;
 299                 if (priv->last_blink_rate != IWL_SOLID_BLINK_IDX) {
 300                         priv->last_blink_rate = IWL_SOLID_BLINK_IDX;
 301                         iwl3945_led_pattern(priv, IWL_LED_LINK,
 302                                             IWL_SOLID_BLINK_IDX);
 303                 }
 304                 return;
 305         }
 306         if (!priv->last_blink_time ||
 307             !time_after(jiffies, priv->last_blink_time +
 308                         msecs_to_jiffies(1000)))
 309                 return;
 310
 311         blink_idx = get_blink_rate(priv);
 312
 313         /* call only if blink rate change */
 314         if (blink_idx != priv->last_blink_rate)
 315                 iwl3945_led_pattern(priv, IWL_LED_LINK, blink_idx);
 316
 317         priv->last_blink_time = jiffies;
 318         priv->last_blink_rate = blink_idx;
 319         priv->rxtxpackets = 0;
 320 }
 321
 322
 323 /* Register all led handler */
 324 int iwl3945_led_register(struct iwl_priv *priv)
 325 {
 326         char *trigger;
 327         int ret;
 328
 329         priv->last_blink_rate = 0;
 330         priv->rxtxpackets = 0;
 331         priv->led_tpt = 0;
 332         priv->last_blink_time = 0;
 333         priv->allow_blinking = 0;
 334
 335         trigger = ieee80211_get_radio_led_name(priv->hw);
 336         snprintf(priv->led[IWL_LED_TRG_RADIO].name,
 337                  sizeof(priv->led[IWL_LED_TRG_RADIO].name), "iwl-%s::radio",
 338                  wiphy_name(priv->hw->wiphy));
 339
 340         priv->led[IWL_LED_TRG_RADIO].led_on = iwl3945_led_on;
 341         priv->led[IWL_LED_TRG_RADIO].led_off = iwl3945_led_off;
 342         priv->led[IWL_LED_TRG_RADIO].led_pattern = NULL;
 343
 344         ret = iwl3945_led_register_led(priv,
 345                                    &priv->led[IWL_LED_TRG_RADIO],
 346                                    IWL_LED_TRG_RADIO, 1, trigger);
 347
 348         if (ret)
 349                 goto exit_fail;
 350
 351         trigger = ieee80211_get_assoc_led_name(priv->hw);
 352         snprintf(priv->led[IWL_LED_TRG_ASSOC].name,
 353                  sizeof(priv->led[IWL_LED_TRG_ASSOC].name), "iwl-%s::assoc",
 354                  wiphy_name(priv->hw->wiphy));
 355
 356         ret = iwl3945_led_register_led(priv,
 357                                    &priv->led[IWL_LED_TRG_ASSOC],
 358                                    IWL_LED_TRG_ASSOC, 0, trigger);
 359
 360         /* for assoc always turn led on */
 361         priv->led[IWL_LED_TRG_ASSOC].led_on = iwl3945_led_associate;
 362         priv->led[IWL_LED_TRG_ASSOC].led_off = iwl3945_led_disassociate;
 363         priv->led[IWL_LED_TRG_ASSOC].led_pattern = NULL;
 364
 365         if (ret)
 366                 goto exit_fail;
 367
 368         trigger = ieee80211_get_rx_led_name(priv->hw);
 369         snprintf(priv->led[IWL_LED_TRG_RX].name,
 370                  sizeof(priv->led[IWL_LED_TRG_RX].name), "iwl-%s::RX",
 371                  wiphy_name(priv->hw->wiphy));
 372
 373         ret = iwl3945_led_register_led(priv,
 374                                    &priv->led[IWL_LED_TRG_RX],
 375                                    IWL_LED_TRG_RX, 0, trigger);
 376
 377         priv->led[IWL_LED_TRG_RX].led_on = iwl3945_led_associated;
 378         priv->led[IWL_LED_TRG_RX].led_off = iwl3945_led_associated;
 379         priv->led[IWL_LED_TRG_RX].led_pattern = iwl3945_led_pattern;
 380
 381         if (ret)
 382                 goto exit_fail;
 383
 384         trigger = ieee80211_get_tx_led_name(priv->hw);
 385         snprintf(priv->led[IWL_LED_TRG_TX].name,
 386                  sizeof(priv->led[IWL_LED_TRG_TX].name), "iwl-%s::TX",
 387                  wiphy_name(priv->hw->wiphy));
 388
 389         ret = iwl3945_led_register_led(priv,
 390                                    &priv->led[IWL_LED_TRG_TX],
 391                                    IWL_LED_TRG_TX, 0, trigger);
 392
 393         priv->led[IWL_LED_TRG_TX].led_on = iwl3945_led_associated;
 394         priv->led[IWL_LED_TRG_TX].led_off = iwl3945_led_associated;
 395         priv->led[IWL_LED_TRG_TX].led_pattern = iwl3945_led_pattern;
 396
 397         if (ret)
 398                 goto exit_fail;
 399
 400         return 0;
 401
 402 exit_fail:
 403         iwl3945_led_unregister(priv);
 404         return ret;
 405 }
 406
 407
 408 /* unregister led class */
 409 static void iwl3945_led_unregister_led(struct iwl_led *led, u8 set_led)
 410 {
 411         if (!led->registered)
 412                 return;
 413
 414         led_classdev_unregister(&led->led_dev);
 415
 416         if (set_led)
 417                 led->led_dev.brightness_set(&led->led_dev, LED_OFF);
 418         led->registered = 0;
 419 }
 420
 421 /* Unregister all led handlers */
 422 void iwl3945_led_unregister(struct iwl_priv *priv)
 423 {
 424         iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_ASSOC], 0);
 425         iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_RX], 0);
 426         iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_TX], 0);
 427         iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_RADIO], 1);
 428 }
 429
 430 #endif