git.oblomov.eu Git - linux-2.6/blob - 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 int iwl3945_led_cmd_callback(struct iwl_priv *priv,
  83                                     struct iwl_cmd *cmd,
  84                                     struct sk_buff *skb)
  85 {
  86         return 1;
  87 }
  88
  89 static inline int iwl3945_brightness_to_idx(enum led_brightness brightness)
  90 {
  91         return fls(0x000000FF & (u32)brightness);
  92 }
  93
  94 /* Send led command */
  95 static int iwl_send_led_cmd(struct iwl_priv *priv,
  96                             struct iwl_led_cmd *led_cmd)
  97 {
  98         struct iwl_host_cmd cmd = {
  99                 .id = REPLY_LEDS_CMD,
 100                 .len = sizeof(struct iwl_led_cmd),
 101                 .data = led_cmd,
 102                 .meta.flags = CMD_ASYNC,
 103                 .meta.u.callback = iwl3945_led_cmd_callback,
 104         };
 105
 106         return iwl_send_cmd(priv, &cmd);
 107 }
 108
 109
 110
 111 /* Set led on command */
 112 static int iwl3945_led_pattern(struct iwl_priv *priv, int led_id,
 113                                unsigned int idx)
 114 {
 115         struct iwl_led_cmd led_cmd = {
 116                 .id = led_id,
 117                 .interval = IWL_DEF_LED_INTRVL
 118         };
 119
 120         BUG_ON(idx > IWL_MAX_BLINK_TBL);
 121
 122         led_cmd.on = blink_tbl[idx].on_time;
 123         led_cmd.off = blink_tbl[idx].off_time;
 124
 125         return iwl_send_led_cmd(priv, &led_cmd);
 126 }
 127
 128
 129 /* Set led on command */
 130 static int iwl3945_led_on(struct iwl_priv *priv, int led_id)
 131 {
 132         struct iwl_led_cmd led_cmd = {
 133                 .id = led_id,
 134                 .on = IWL_LED_SOLID,
 135                 .off = 0,
 136                 .interval = IWL_DEF_LED_INTRVL
 137         };
 138         return iwl_send_led_cmd(priv, &led_cmd);
 139 }
 140
 141 /* Set led off command */
 142 static int iwl3945_led_off(struct iwl_priv *priv, int led_id)
 143 {
 144         struct iwl_led_cmd led_cmd = {
 145                 .id = led_id,
 146                 .on = 0,
 147                 .off = 0,
 148                 .interval = IWL_DEF_LED_INTRVL
 149         };
 150         IWL_DEBUG_LED(priv, "led off %d\n", led_id);
 151         return iwl_send_led_cmd(priv, &led_cmd);
 152 }
 153
 154 /*
 155  *  Set led on in case of association
 156  *  */
 157 static int iwl3945_led_associate(struct iwl_priv *priv, int led_id)
 158 {
 159         IWL_DEBUG_LED(priv, "Associated\n");
 160
 161         priv->allow_blinking = 1;
 162         return iwl3945_led_on(priv, led_id);
 163 }
 164 /* Set Led off in case of disassociation */
 165 static int iwl3945_led_disassociate(struct iwl_priv *priv, int led_id)
 166 {
 167         IWL_DEBUG_LED(priv, "Disassociated\n");
 168
 169         priv->allow_blinking = 0;
 170
 171         return 0;
 172 }
 173
 174 /*
 175  * brightness call back function for Tx/Rx LED
 176  */
 177 static int iwl3945_led_associated(struct iwl_priv *priv, int led_id)
 178 {
 179         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 180             !test_bit(STATUS_READY, &priv->status))
 181                 return 0;
 182
 183
 184         /* start counting Tx/Rx bytes */
 185         if (!priv->last_blink_time && priv->allow_blinking)
 186                 priv->last_blink_time = jiffies;
 187         return 0;
 188 }
 189
 190 /*
 191  * brightness call back for association and radio
 192  */
 193 static void iwl3945_led_brightness_set(struct led_classdev *led_cdev,
 194                                 enum led_brightness brightness)
 195 {
 196         struct iwl_led *led = container_of(led_cdev,
 197                                            struct iwl_led, led_dev);
 198         struct iwl_priv *priv = led->priv;
 199
 200         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 201                 return;
 202
 203         IWL_DEBUG_LED(priv, "Led type = %s brightness = %d\n",
 204                         led_type_str[led->type], brightness);
 205
 206         switch (brightness) {
 207         case LED_FULL:
 208                 if (led->led_on)
 209                         led->led_on(priv, IWL_LED_LINK);
 210                 break;
 211         case LED_OFF:
 212                 if (led->led_off)
 213                         led->led_off(priv, IWL_LED_LINK);
 214                 break;
 215         default:
 216                 if (led->led_pattern) {
 217                         int idx = iwl3945_brightness_to_idx(brightness);
 218                         led->led_pattern(priv, IWL_LED_LINK, idx);
 219                 }
 220                 break;
 221         }
 222 }
 223
 224 /*
 225  * Register led class with the system
 226  */
 227 static int iwl3945_led_register_led(struct iwl_priv *priv,
 228                                    struct iwl_led *led,
 229                                    enum led_type type, u8 set_led,
 230                                    char *trigger)
 231 {
 232         struct device *device = wiphy_dev(priv->hw->wiphy);
 233         int ret;
 234
 235         led->led_dev.name = led->name;
 236         led->led_dev.brightness_set = iwl3945_led_brightness_set;
 237         led->led_dev.default_trigger = trigger;
 238
 239         led->priv = priv;
 240         led->type = type;
 241
 242         ret = led_classdev_register(device, &led->led_dev);
 243         if (ret) {
 244                 IWL_ERR(priv, "Error: failed to register led handler.\n");
 245                 return ret;
 246         }
 247
 248         led->registered = 1;
 249
 250         if (set_led && led->led_on)
 251                 led->led_on(priv, IWL_LED_LINK);
 252         return 0;
 253 }
 254
 255
 256 /*
 257  * calculate blink rate according to last 2 sec Tx/Rx activities
 258  */
 259 static inline u8 get_blink_rate(struct iwl_priv *priv)
 260 {
 261         int index;
 262         s64 tpt = priv->rxtxpackets;
 263
 264         if (tpt < 0)
 265                 tpt = -tpt;
 266
 267         IWL_DEBUG_LED(priv, "tpt %lld \n", (long long)tpt);
 268
 269         if (!priv->allow_blinking)
 270                 index = IWL_MAX_BLINK_TBL;
 271         else
 272                 for (index = 0; index < IWL_MAX_BLINK_TBL; index++)
 273                         if (tpt > (blink_tbl[index].brightness * IWL_1MB_RATE))
 274                                 break;
 275
 276         IWL_DEBUG_LED(priv, "LED BLINK IDX=%d\n", index);
 277         return index;
 278 }
 279
 280 /*
 281  * this function called from handler. Since setting Led command can
 282  * happen very frequent we postpone led command to be called from
 283  * REPLY handler so we know ucode is up
 284  */
 285 void iwl3945_led_background(struct iwl_priv *priv)
 286 {
 287         u8 blink_idx;
 288
 289         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 290                 priv->last_blink_time = 0;
 291                 return;
 292         }
 293         if (iwl_is_rfkill(priv)) {
 294                 priv->last_blink_time = 0;
 295                 return;
 296         }
 297
 298         if (!priv->allow_blinking) {
 299                 priv->last_blink_time = 0;
 300                 if (priv->last_blink_rate != IWL_SOLID_BLINK_IDX) {
 301                         priv->last_blink_rate = IWL_SOLID_BLINK_IDX;
 302                         iwl3945_led_pattern(priv, IWL_LED_LINK,
 303                                             IWL_SOLID_BLINK_IDX);
 304                 }
 305                 return;
 306         }
 307         if (!priv->last_blink_time ||
 308             !time_after(jiffies, priv->last_blink_time +
 309                         msecs_to_jiffies(1000)))
 310                 return;
 311
 312         blink_idx = get_blink_rate(priv);
 313
 314         /* call only if blink rate change */
 315         if (blink_idx != priv->last_blink_rate)
 316                 iwl3945_led_pattern(priv, IWL_LED_LINK, blink_idx);
 317
 318         priv->last_blink_time = jiffies;
 319         priv->last_blink_rate = blink_idx;
 320         priv->rxtxpackets = 0;
 321 }
 322
 323
 324 /* Register all led handler */
 325 int iwl3945_led_register(struct iwl_priv *priv)
 326 {
 327         char *trigger;
 328         int ret;
 329
 330         priv->last_blink_rate = 0;
 331         priv->rxtxpackets = 0;
 332         priv->led_tpt = 0;
 333         priv->last_blink_time = 0;
 334         priv->allow_blinking = 0;
 335
 336         trigger = ieee80211_get_radio_led_name(priv->hw);
 337         snprintf(priv->led[IWL_LED_TRG_RADIO].name,
 338                  sizeof(priv->led[IWL_LED_TRG_RADIO].name), "iwl-%s::radio",
 339                  wiphy_name(priv->hw->wiphy));
 340
 341         priv->led[IWL_LED_TRG_RADIO].led_on = iwl3945_led_on;
 342         priv->led[IWL_LED_TRG_RADIO].led_off = iwl3945_led_off;
 343         priv->led[IWL_LED_TRG_RADIO].led_pattern = NULL;
 344
 345         ret = iwl3945_led_register_led(priv,
 346                                    &priv->led[IWL_LED_TRG_RADIO],
 347                                    IWL_LED_TRG_RADIO, 1, trigger);
 348
 349         if (ret)
 350                 goto exit_fail;
 351
 352         trigger = ieee80211_get_assoc_led_name(priv->hw);
 353         snprintf(priv->led[IWL_LED_TRG_ASSOC].name,
 354                  sizeof(priv->led[IWL_LED_TRG_ASSOC].name), "iwl-%s::assoc",
 355                  wiphy_name(priv->hw->wiphy));
 356
 357         ret = iwl3945_led_register_led(priv,
 358                                    &priv->led[IWL_LED_TRG_ASSOC],
 359                                    IWL_LED_TRG_ASSOC, 0, trigger);
 360
 361         /* for assoc always turn led on */
 362         priv->led[IWL_LED_TRG_ASSOC].led_on = iwl3945_led_associate;
 363         priv->led[IWL_LED_TRG_ASSOC].led_off = iwl3945_led_disassociate;
 364         priv->led[IWL_LED_TRG_ASSOC].led_pattern = NULL;
 365
 366         if (ret)
 367                 goto exit_fail;
 368
 369         trigger = ieee80211_get_rx_led_name(priv->hw);
 370         snprintf(priv->led[IWL_LED_TRG_RX].name,
 371                  sizeof(priv->led[IWL_LED_TRG_RX].name), "iwl-%s::RX",
 372                  wiphy_name(priv->hw->wiphy));
 373
 374         ret = iwl3945_led_register_led(priv,
 375                                    &priv->led[IWL_LED_TRG_RX],
 376                                    IWL_LED_TRG_RX, 0, trigger);
 377
 378         priv->led[IWL_LED_TRG_RX].led_on = iwl3945_led_associated;
 379         priv->led[IWL_LED_TRG_RX].led_off = iwl3945_led_associated;
 380         priv->led[IWL_LED_TRG_RX].led_pattern = iwl3945_led_pattern;
 381
 382         if (ret)
 383                 goto exit_fail;
 384
 385         trigger = ieee80211_get_tx_led_name(priv->hw);
 386         snprintf(priv->led[IWL_LED_TRG_TX].name,
 387                  sizeof(priv->led[IWL_LED_TRG_TX].name), "iwl-%s::TX",
 388                  wiphy_name(priv->hw->wiphy));
 389
 390         ret = iwl3945_led_register_led(priv,
 391                                    &priv->led[IWL_LED_TRG_TX],
 392                                    IWL_LED_TRG_TX, 0, trigger);
 393
 394         priv->led[IWL_LED_TRG_TX].led_on = iwl3945_led_associated;
 395         priv->led[IWL_LED_TRG_TX].led_off = iwl3945_led_associated;
 396         priv->led[IWL_LED_TRG_TX].led_pattern = iwl3945_led_pattern;
 397
 398         if (ret)
 399                 goto exit_fail;
 400
 401         return 0;
 402
 403 exit_fail:
 404         iwl3945_led_unregister(priv);
 405         return ret;
 406 }
 407
 408
 409 /* unregister led class */
 410 static void iwl3945_led_unregister_led(struct iwl_led *led, u8 set_led)
 411 {
 412         if (!led->registered)
 413                 return;
 414
 415         led_classdev_unregister(&led->led_dev);
 416
 417         if (set_led)
 418                 led->led_dev.brightness_set(&led->led_dev, LED_OFF);
 419         led->registered = 0;
 420 }
 421
 422 /* Unregister all led handlers */
 423 void iwl3945_led_unregister(struct iwl_priv *priv)
 424 {
 425         iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_ASSOC], 0);
 426         iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_RX], 0);
 427         iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_TX], 0);
 428         iwl3945_led_unregister_led(&priv->led[IWL_LED_TRG_RADIO], 1);
 429 }
 430
 431 #endif