1 /******************************************************************************
3 * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
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.
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
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
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *****************************************************************************/
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/delay.h>
34 #include <linux/skbuff.h>
35 #include <linux/netdevice.h>
36 #include <linux/wireless.h>
37 #include <net/mac80211.h>
38 #include <linux/etherdevice.h>
39 #include <asm/unaligned.h>
41 #include "iwl-commands.h"
62 {-1, IWL_LED_SOLID, 0}
65 #define IWL_1MB_RATE (128 * 1024)
66 #define IWL_LED_THRESHOLD (16)
67 #define IWL_MAX_BLINK_TBL (ARRAY_SIZE(blink_tbl) - 1) /*Exclude Solid on*/
68 #define IWL_SOLID_BLINK_IDX (ARRAY_SIZE(blink_tbl) - 1)
70 static int iwl3945_led_cmd_callback(struct iwl_priv *priv,
77 static inline int iwl3945_brightness_to_idx(enum led_brightness brightness)
79 return fls(0x000000FF & (u32)brightness);
82 /* Send led command */
83 static int iwl_send_led_cmd(struct iwl_priv *priv,
84 struct iwl_led_cmd *led_cmd)
86 struct iwl_host_cmd cmd = {
88 .len = sizeof(struct iwl_led_cmd),
90 .meta.flags = CMD_ASYNC,
91 .meta.u.callback = iwl3945_led_cmd_callback,
94 return iwl3945_send_cmd(priv, &cmd);
99 /* Set led on command */
100 static int iwl3945_led_pattern(struct iwl_priv *priv, int led_id,
103 struct iwl_led_cmd led_cmd = {
105 .interval = IWL_DEF_LED_INTRVL
108 BUG_ON(idx > IWL_MAX_BLINK_TBL);
110 led_cmd.on = blink_tbl[idx].on_time;
111 led_cmd.off = blink_tbl[idx].off_time;
113 return iwl_send_led_cmd(priv, &led_cmd);
117 /* Set led on command */
118 static int iwl3945_led_on(struct iwl_priv *priv, int led_id)
120 struct iwl_led_cmd led_cmd = {
124 .interval = IWL_DEF_LED_INTRVL
126 return iwl_send_led_cmd(priv, &led_cmd);
129 /* Set led off command */
130 static int iwl3945_led_off(struct iwl_priv *priv, int led_id)
132 struct iwl_led_cmd led_cmd = {
136 .interval = IWL_DEF_LED_INTRVL
138 IWL_DEBUG_LED("led off %d\n", led_id);
139 return iwl_send_led_cmd(priv, &led_cmd);
143 * brightness call back function for Tx/Rx LED
145 static int iwl3945_led_associated(struct iwl_priv *priv, int led_id)
147 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
148 !test_bit(STATUS_READY, &priv->status))
152 /* start counting Tx/Rx bytes */
153 if (!priv->last_blink_time && priv->allow_blinking)
154 priv->last_blink_time = jiffies;
159 * brightness call back for association and radio
161 static void iwl3945_led_brightness_set(struct led_classdev *led_cdev,
162 enum led_brightness brightness)
164 struct iwl3945_led *led = container_of(led_cdev,
165 struct iwl3945_led, led_dev);
166 struct iwl_priv *priv = led->priv;
168 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
171 switch (brightness) {
173 if (led->type == IWL_LED_TRG_ASSOC) {
174 priv->allow_blinking = 1;
175 IWL_DEBUG_LED("MAC is associated\n");
178 led->led_on(priv, IWL_LED_LINK);
181 if (led->type == IWL_LED_TRG_ASSOC) {
182 priv->allow_blinking = 0;
183 IWL_DEBUG_LED("MAC is disassociated\n");
186 led->led_off(priv, IWL_LED_LINK);
189 if (led->led_pattern) {
190 int idx = iwl3945_brightness_to_idx(brightness);
191 led->led_pattern(priv, IWL_LED_LINK, idx);
200 * Register led class with the system
202 static int iwl3945_led_register_led(struct iwl_priv *priv,
203 struct iwl3945_led *led,
204 enum led_type type, u8 set_led,
207 struct device *device = wiphy_dev(priv->hw->wiphy);
210 led->led_dev.name = led->name;
211 led->led_dev.brightness_set = iwl3945_led_brightness_set;
212 led->led_dev.default_trigger = trigger;
217 ret = led_classdev_register(device, &led->led_dev);
219 IWL_ERR(priv, "Error: failed to register led handler.\n");
225 if (set_led && led->led_on)
226 led->led_on(priv, IWL_LED_LINK);
232 * calculate blink rate according to last 2 sec Tx/Rx activities
234 static inline u8 get_blink_rate(struct iwl_priv *priv)
237 u64 current_tpt = priv->rxtxpackets;
238 s64 tpt = current_tpt - priv->led_tpt;
242 priv->led_tpt = current_tpt;
244 if (!priv->allow_blinking)
245 index = IWL_MAX_BLINK_TBL;
247 for (index = 0; index < IWL_MAX_BLINK_TBL; index++)
248 if (tpt > (blink_tbl[index].brightness * IWL_1MB_RATE))
253 static inline int is_rf_kill(struct iwl_priv *priv)
255 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
256 test_bit(STATUS_RF_KILL_SW, &priv->status);
260 * this function called from handler. Since setting Led command can
261 * happen very frequent we postpone led command to be called from
262 * REPLY handler so we know ucode is up
264 void iwl3945_led_background(struct iwl_priv *priv)
268 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
269 priv->last_blink_time = 0;
272 if (is_rf_kill(priv)) {
273 priv->last_blink_time = 0;
277 if (!priv->allow_blinking) {
278 priv->last_blink_time = 0;
279 if (priv->last_blink_rate != IWL_SOLID_BLINK_IDX) {
280 priv->last_blink_rate = IWL_SOLID_BLINK_IDX;
281 iwl3945_led_pattern(priv, IWL_LED_LINK,
282 IWL_SOLID_BLINK_IDX);
286 if (!priv->last_blink_time ||
287 !time_after(jiffies, priv->last_blink_time +
288 msecs_to_jiffies(1000)))
291 blink_idx = get_blink_rate(priv);
293 /* call only if blink rate change */
294 if (blink_idx != priv->last_blink_rate)
295 iwl3945_led_pattern(priv, IWL_LED_LINK, blink_idx);
297 priv->last_blink_time = jiffies;
298 priv->last_blink_rate = blink_idx;
299 priv->rxtxpackets = 0;
303 /* Register all led handler */
304 int iwl3945_led_register(struct iwl_priv *priv)
309 priv->last_blink_rate = 0;
310 priv->rxtxpackets = 0;
312 priv->last_blink_time = 0;
313 priv->allow_blinking = 0;
315 trigger = ieee80211_get_radio_led_name(priv->hw);
316 snprintf(priv->led39[IWL_LED_TRG_RADIO].name,
317 sizeof(priv->led39[IWL_LED_TRG_RADIO].name), "iwl-%s:radio",
318 wiphy_name(priv->hw->wiphy));
320 priv->led39[IWL_LED_TRG_RADIO].led_on = iwl3945_led_on;
321 priv->led39[IWL_LED_TRG_RADIO].led_off = iwl3945_led_off;
322 priv->led39[IWL_LED_TRG_RADIO].led_pattern = NULL;
324 ret = iwl3945_led_register_led(priv,
325 &priv->led39[IWL_LED_TRG_RADIO],
326 IWL_LED_TRG_RADIO, 1, trigger);
331 trigger = ieee80211_get_assoc_led_name(priv->hw);
332 snprintf(priv->led39[IWL_LED_TRG_ASSOC].name,
333 sizeof(priv->led39[IWL_LED_TRG_ASSOC].name), "iwl-%s:assoc",
334 wiphy_name(priv->hw->wiphy));
336 ret = iwl3945_led_register_led(priv,
337 &priv->led39[IWL_LED_TRG_ASSOC],
338 IWL_LED_TRG_ASSOC, 0, trigger);
340 /* for assoc always turn led on */
341 priv->led39[IWL_LED_TRG_ASSOC].led_on = iwl3945_led_on;
342 priv->led39[IWL_LED_TRG_ASSOC].led_off = iwl3945_led_on;
343 priv->led39[IWL_LED_TRG_ASSOC].led_pattern = NULL;
348 trigger = ieee80211_get_rx_led_name(priv->hw);
349 snprintf(priv->led39[IWL_LED_TRG_RX].name,
350 sizeof(priv->led39[IWL_LED_TRG_RX].name), "iwl-%s:RX",
351 wiphy_name(priv->hw->wiphy));
353 ret = iwl3945_led_register_led(priv,
354 &priv->led39[IWL_LED_TRG_RX],
355 IWL_LED_TRG_RX, 0, trigger);
357 priv->led39[IWL_LED_TRG_RX].led_on = iwl3945_led_associated;
358 priv->led39[IWL_LED_TRG_RX].led_off = iwl3945_led_associated;
359 priv->led39[IWL_LED_TRG_RX].led_pattern = iwl3945_led_pattern;
364 trigger = ieee80211_get_tx_led_name(priv->hw);
365 snprintf(priv->led39[IWL_LED_TRG_TX].name,
366 sizeof(priv->led39[IWL_LED_TRG_TX].name), "iwl-%s:TX",
367 wiphy_name(priv->hw->wiphy));
369 ret = iwl3945_led_register_led(priv,
370 &priv->led39[IWL_LED_TRG_TX],
371 IWL_LED_TRG_TX, 0, trigger);
373 priv->led39[IWL_LED_TRG_TX].led_on = iwl3945_led_associated;
374 priv->led39[IWL_LED_TRG_TX].led_off = iwl3945_led_associated;
375 priv->led39[IWL_LED_TRG_TX].led_pattern = iwl3945_led_pattern;
383 iwl3945_led_unregister(priv);
388 /* unregister led class */
389 static void iwl3945_led_unregister_led(struct iwl3945_led *led, u8 set_led)
391 if (!led->registered)
394 led_classdev_unregister(&led->led_dev);
397 led->led_dev.brightness_set(&led->led_dev, LED_OFF);
401 /* Unregister all led handlers */
402 void iwl3945_led_unregister(struct iwl_priv *priv)
404 iwl3945_led_unregister_led(&priv->led39[IWL_LED_TRG_ASSOC], 0);
405 iwl3945_led_unregister_led(&priv->led39[IWL_LED_TRG_RX], 0);
406 iwl3945_led_unregister_led(&priv->led39[IWL_LED_TRG_TX], 0);
407 iwl3945_led_unregister_led(&priv->led39[IWL_LED_TRG_RADIO], 1);