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>
45 #ifdef CONFIG_IWLWIFI_DEBUG
46 static const char *led_type_str
[] = {
47 __stringify(IWL_LED_TRG_TX
),
48 __stringify(IWL_LED_TRG_RX
),
49 __stringify(IWL_LED_TRG_ASSOC
),
50 __stringify(IWL_LED_TRG_RADIO
),
53 #endif /* CONFIG_IWLWIFI_DEBUG */
73 {-1, IWL_LED_SOLID
, 0}
76 #define IWL_1MB_RATE (128 * 1024)
77 #define IWL_LED_THRESHOLD (16)
78 #define IWL_MAX_BLINK_TBL (ARRAY_SIZE(blink_tbl) - 1) /* exclude SOLID_ON */
79 #define IWL_SOLID_BLINK_IDX (ARRAY_SIZE(blink_tbl) - 1)
81 /* [0-256] -> [0..8] FIXME: we need [0..10] */
82 static inline int iwl_brightness_to_idx(enum led_brightness brightness
)
84 return fls(0x000000FF & (u32
)brightness
);
87 /* Send led command */
88 static int iwl_send_led_cmd(struct iwl_priv
*priv
, struct iwl_led_cmd
*led_cmd
)
90 struct iwl_host_cmd cmd
= {
92 .len
= sizeof(struct iwl_led_cmd
),
94 .meta
.flags
= CMD_ASYNC
,
95 .meta
.u
.callback
= NULL
,
99 reg
= iwl_read32(priv
, CSR_LED_REG
);
100 if (reg
!= (reg
& CSR_LED_BSM_CTRL_MSK
))
101 iwl_write32(priv
, CSR_LED_REG
, reg
& CSR_LED_BSM_CTRL_MSK
);
103 return iwl_send_cmd(priv
, &cmd
);
106 /* Set led pattern command */
107 static int iwl4965_led_pattern(struct iwl_priv
*priv
, int led_id
,
110 struct iwl_led_cmd led_cmd
= {
112 .interval
= IWL_DEF_LED_INTRVL
115 BUG_ON(idx
> IWL_MAX_BLINK_TBL
);
117 led_cmd
.on
= blink_tbl
[idx
].on_time
;
118 led_cmd
.off
= blink_tbl
[idx
].off_time
;
120 return iwl_send_led_cmd(priv
, &led_cmd
);
123 /* Set led register off */
124 static int iwl4965_led_on_reg(struct iwl_priv
*priv
, int led_id
)
126 IWL_DEBUG_LED(priv
, "led on %d\n", led_id
);
127 iwl_write32(priv
, CSR_LED_REG
, CSR_LED_REG_TRUN_ON
);
132 /* Set led on command */
133 static int iwl4965_led_on(struct iwl_priv
*priv
, int led_id
)
135 struct iwl_led_cmd led_cmd
= {
139 .interval
= IWL_DEF_LED_INTRVL
141 return iwl_send_led_cmd(priv
, &led_cmd
);
144 /* Set led off command */
145 int iwl4965_led_off(struct iwl_priv
*priv
, int led_id
)
147 struct iwl_led_cmd led_cmd
= {
151 .interval
= IWL_DEF_LED_INTRVL
153 IWL_DEBUG_LED(priv
, "led off %d\n", led_id
);
154 return iwl_send_led_cmd(priv
, &led_cmd
);
159 /* Set led register off */
160 static int iwl4965_led_off_reg(struct iwl_priv
*priv
, int led_id
)
162 IWL_DEBUG_LED(priv
, "LED Reg off\n");
163 iwl_write32(priv
, CSR_LED_REG
, CSR_LED_REG_TRUN_OFF
);
168 * Set led register in case of disassociation according to rfkill state
170 static int iwl_led_associate(struct iwl_priv
*priv
, int led_id
)
172 IWL_DEBUG_LED(priv
, "Associated\n");
173 priv
->allow_blinking
= 1;
174 return iwl4965_led_on_reg(priv
, led_id
);
176 static int iwl_led_disassociate(struct iwl_priv
*priv
, int led_id
)
178 priv
->allow_blinking
= 0;
179 if (iwl_is_rfkill(priv
))
180 iwl4965_led_off_reg(priv
, led_id
);
182 iwl4965_led_on_reg(priv
, led_id
);
188 * brightness call back function for Tx/Rx LED
190 static int iwl_led_associated(struct iwl_priv
*priv
, int led_id
)
192 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
) ||
193 !test_bit(STATUS_READY
, &priv
->status
))
197 /* start counting Tx/Rx bytes */
198 if (!priv
->last_blink_time
&& priv
->allow_blinking
)
199 priv
->last_blink_time
= jiffies
;
204 * brightness call back for association and radio
206 static void iwl_led_brightness_set(struct led_classdev
*led_cdev
,
207 enum led_brightness brightness
)
209 struct iwl_led
*led
= container_of(led_cdev
, struct iwl_led
, led_dev
);
210 struct iwl_priv
*priv
= led
->priv
;
212 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
216 IWL_DEBUG_LED(priv
, "Led type = %s brightness = %d\n",
217 led_type_str
[led
->type
], brightness
);
218 switch (brightness
) {
221 led
->led_on(priv
, IWL_LED_LINK
);
225 led
->led_off(priv
, IWL_LED_LINK
);
228 if (led
->led_pattern
) {
229 int idx
= iwl_brightness_to_idx(brightness
);
230 led
->led_pattern(priv
, IWL_LED_LINK
, idx
);
239 * Register led class with the system
241 static int iwl_leds_register_led(struct iwl_priv
*priv
, struct iwl_led
*led
,
242 enum led_type type
, u8 set_led
,
245 struct device
*device
= wiphy_dev(priv
->hw
->wiphy
);
248 led
->led_dev
.name
= led
->name
;
249 led
->led_dev
.brightness_set
= iwl_led_brightness_set
;
250 led
->led_dev
.default_trigger
= trigger
;
255 ret
= led_classdev_register(device
, &led
->led_dev
);
257 IWL_ERR(priv
, "Error: failed to register led handler.\n");
263 if (set_led
&& led
->led_on
)
264 led
->led_on(priv
, IWL_LED_LINK
);
271 * calculate blink rate according to last 2 sec Tx/Rx activities
273 static int iwl_get_blink_rate(struct iwl_priv
*priv
)
276 u64 current_tpt
= priv
->tx_stats
[2].bytes
;
277 /* FIXME: + priv->rx_stats[2].bytes; */
278 s64 tpt
= current_tpt
- priv
->led_tpt
;
280 if (tpt
< 0) /* wraparound */
283 IWL_DEBUG_LED(priv
, "tpt %lld current_tpt %llu\n",
285 (unsigned long long)current_tpt
);
286 priv
->led_tpt
= current_tpt
;
288 if (!priv
->allow_blinking
)
289 i
= IWL_MAX_BLINK_TBL
;
291 for (i
= 0; i
< IWL_MAX_BLINK_TBL
; i
++)
292 if (tpt
> (blink_tbl
[i
].tpt
* IWL_1MB_RATE
))
295 IWL_DEBUG_LED(priv
, "LED BLINK IDX=%d\n", i
);
300 * this function called from handler. Since setting Led command can
301 * happen very frequent we postpone led command to be called from
302 * REPLY handler so we know ucode is up
304 void iwl_leds_background(struct iwl_priv
*priv
)
308 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
)) {
309 priv
->last_blink_time
= 0;
312 if (iwl_is_rfkill(priv
)) {
313 priv
->last_blink_time
= 0;
317 if (!priv
->allow_blinking
) {
318 priv
->last_blink_time
= 0;
319 if (priv
->last_blink_rate
!= IWL_SOLID_BLINK_IDX
) {
320 priv
->last_blink_rate
= IWL_SOLID_BLINK_IDX
;
321 iwl4965_led_pattern(priv
, IWL_LED_LINK
,
322 IWL_SOLID_BLINK_IDX
);
326 if (!priv
->last_blink_time
||
327 !time_after(jiffies
, priv
->last_blink_time
+
328 msecs_to_jiffies(1000)))
331 blink_idx
= iwl_get_blink_rate(priv
);
333 /* call only if blink rate change */
334 if (blink_idx
!= priv
->last_blink_rate
)
335 iwl4965_led_pattern(priv
, IWL_LED_LINK
, blink_idx
);
337 priv
->last_blink_time
= jiffies
;
338 priv
->last_blink_rate
= blink_idx
;
340 EXPORT_SYMBOL(iwl_leds_background
);
342 /* Register all led handler */
343 int iwl_leds_register(struct iwl_priv
*priv
)
348 priv
->last_blink_rate
= 0;
350 priv
->last_blink_time
= 0;
351 priv
->allow_blinking
= 0;
353 trigger
= ieee80211_get_radio_led_name(priv
->hw
);
354 snprintf(priv
->led
[IWL_LED_TRG_RADIO
].name
,
355 sizeof(priv
->led
[IWL_LED_TRG_RADIO
].name
), "iwl-%s::radio",
356 wiphy_name(priv
->hw
->wiphy
));
358 priv
->led
[IWL_LED_TRG_RADIO
].led_on
= iwl4965_led_on_reg
;
359 priv
->led
[IWL_LED_TRG_RADIO
].led_off
= iwl4965_led_off_reg
;
360 priv
->led
[IWL_LED_TRG_RADIO
].led_pattern
= NULL
;
362 ret
= iwl_leds_register_led(priv
, &priv
->led
[IWL_LED_TRG_RADIO
],
363 IWL_LED_TRG_RADIO
, 1, trigger
);
367 trigger
= ieee80211_get_assoc_led_name(priv
->hw
);
368 snprintf(priv
->led
[IWL_LED_TRG_ASSOC
].name
,
369 sizeof(priv
->led
[IWL_LED_TRG_ASSOC
].name
), "iwl-%s::assoc",
370 wiphy_name(priv
->hw
->wiphy
));
372 ret
= iwl_leds_register_led(priv
, &priv
->led
[IWL_LED_TRG_ASSOC
],
373 IWL_LED_TRG_ASSOC
, 0, trigger
);
375 /* for assoc always turn led on */
376 priv
->led
[IWL_LED_TRG_ASSOC
].led_on
= iwl_led_associate
;
377 priv
->led
[IWL_LED_TRG_ASSOC
].led_off
= iwl_led_disassociate
;
378 priv
->led
[IWL_LED_TRG_ASSOC
].led_pattern
= NULL
;
383 trigger
= ieee80211_get_rx_led_name(priv
->hw
);
384 snprintf(priv
->led
[IWL_LED_TRG_RX
].name
,
385 sizeof(priv
->led
[IWL_LED_TRG_RX
].name
), "iwl-%s::RX",
386 wiphy_name(priv
->hw
->wiphy
));
388 ret
= iwl_leds_register_led(priv
, &priv
->led
[IWL_LED_TRG_RX
],
389 IWL_LED_TRG_RX
, 0, trigger
);
391 priv
->led
[IWL_LED_TRG_RX
].led_on
= iwl_led_associated
;
392 priv
->led
[IWL_LED_TRG_RX
].led_off
= iwl_led_associated
;
393 priv
->led
[IWL_LED_TRG_RX
].led_pattern
= iwl4965_led_pattern
;
398 trigger
= ieee80211_get_tx_led_name(priv
->hw
);
399 snprintf(priv
->led
[IWL_LED_TRG_TX
].name
,
400 sizeof(priv
->led
[IWL_LED_TRG_TX
].name
), "iwl-%s::TX",
401 wiphy_name(priv
->hw
->wiphy
));
403 ret
= iwl_leds_register_led(priv
, &priv
->led
[IWL_LED_TRG_TX
],
404 IWL_LED_TRG_TX
, 0, trigger
);
406 priv
->led
[IWL_LED_TRG_TX
].led_on
= iwl_led_associated
;
407 priv
->led
[IWL_LED_TRG_TX
].led_off
= iwl_led_associated
;
408 priv
->led
[IWL_LED_TRG_TX
].led_pattern
= iwl4965_led_pattern
;
416 iwl_leds_unregister(priv
);
419 EXPORT_SYMBOL(iwl_leds_register
);
421 /* unregister led class */
422 static void iwl_leds_unregister_led(struct iwl_led
*led
, u8 set_led
)
424 if (!led
->registered
)
427 led_classdev_unregister(&led
->led_dev
);
430 led
->led_dev
.brightness_set(&led
->led_dev
, LED_OFF
);
434 /* Unregister all led handlers */
435 void iwl_leds_unregister(struct iwl_priv
*priv
)
437 iwl_leds_unregister_led(&priv
->led
[IWL_LED_TRG_ASSOC
], 0);
438 iwl_leds_unregister_led(&priv
->led
[IWL_LED_TRG_RX
], 0);
439 iwl_leds_unregister_led(&priv
->led
[IWL_LED_TRG_TX
], 0);
440 iwl_leds_unregister_led(&priv
->led
[IWL_LED_TRG_RADIO
], 1);
442 EXPORT_SYMBOL(iwl_leds_unregister
);