1 /******************************************************************************
3 * Copyright(c) 2003 - 2008 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 * James P. Ketrenos <ipw2100-admin@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/version.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>
45 #include "iwl-helpers.h"
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
),
55 #endif /* CONFIG_IWLWIFI_DEBUG */
75 {-1, IWL_LED_SOLID
, 0}
78 #define IWL_1MB_RATE (128 * 1024)
79 #define IWL_LED_THRESHOLD (16)
80 #define IWL_MAX_BLINK_TBL (ARRAY_SIZE(blink_tbl) - 1) /* exclude SOLID_ON */
81 #define IWL_SOLID_BLINK_IDX (ARRAY_SIZE(blink_tbl) - 1)
83 /* [0-256] -> [0..8] FIXME: we need [0..10] */
84 static inline int iwl_brightness_to_idx(enum led_brightness brightness
)
86 return fls(0x000000FF & (u32
)brightness
);
89 /* Send led command */
90 static int iwl_send_led_cmd(struct iwl_priv
*priv
, struct iwl_led_cmd
*led_cmd
)
92 struct iwl_host_cmd cmd
= {
94 .len
= sizeof(struct iwl_led_cmd
),
96 .meta
.flags
= CMD_ASYNC
,
97 .meta
.u
.callback
= NULL
,
101 reg
= iwl_read32(priv
, CSR_LED_REG
);
102 if (reg
!= (reg
& CSR_LED_BSM_CTRL_MSK
))
103 iwl_write32(priv
, CSR_LED_REG
, reg
& CSR_LED_BSM_CTRL_MSK
);
105 return iwl_send_cmd(priv
, &cmd
);
108 /* Set led pattern command */
109 static int iwl4965_led_pattern(struct iwl_priv
*priv
, int led_id
,
112 struct iwl_led_cmd led_cmd
= {
114 .interval
= IWL_DEF_LED_INTRVL
117 BUG_ON(idx
> IWL_MAX_BLINK_TBL
);
119 led_cmd
.on
= blink_tbl
[idx
].on_time
;
120 led_cmd
.off
= blink_tbl
[idx
].off_time
;
122 return iwl_send_led_cmd(priv
, &led_cmd
);
125 /* Set led register off */
126 static int iwl4965_led_on_reg(struct iwl_priv
*priv
, int led_id
)
128 IWL_DEBUG_LED("led on %d\n", led_id
);
129 iwl_write32(priv
, CSR_LED_REG
, CSR_LED_REG_TRUN_ON
);
134 /* Set led on command */
135 static int iwl4965_led_on(struct iwl_priv
*priv
, int led_id
)
137 struct iwl_led_cmd led_cmd
= {
141 .interval
= IWL_DEF_LED_INTRVL
143 return iwl_send_led_cmd(priv
, &led_cmd
);
146 /* Set led off command */
147 int iwl4965_led_off(struct iwl_priv
*priv
, int led_id
)
149 struct iwl_led_cmd led_cmd
= {
153 .interval
= IWL_DEF_LED_INTRVL
155 IWL_DEBUG_LED("led off %d\n", led_id
);
156 return iwl_send_led_cmd(priv
, &led_cmd
);
161 /* Set led register off */
162 static int iwl4965_led_off_reg(struct iwl_priv
*priv
, int led_id
)
164 IWL_DEBUG_LED("radio off\n");
165 iwl_write32(priv
, CSR_LED_REG
, CSR_LED_REG_TRUN_OFF
);
170 * brightness call back function for Tx/Rx LED
172 static int iwl_led_associated(struct iwl_priv
*priv
, int led_id
)
174 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
) ||
175 !test_bit(STATUS_READY
, &priv
->status
))
179 /* start counting Tx/Rx bytes */
180 if (!priv
->last_blink_time
&& priv
->allow_blinking
)
181 priv
->last_blink_time
= jiffies
;
186 * brightness call back for association and radio
188 static void iwl_led_brightness_set(struct led_classdev
*led_cdev
,
189 enum led_brightness brightness
)
191 struct iwl_led
*led
= container_of(led_cdev
, struct iwl_led
, led_dev
);
192 struct iwl_priv
*priv
= led
->priv
;
194 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
198 IWL_DEBUG_LED("Led type = %s brightness = %d\n",
199 led_type_str
[led
->type
], brightness
);
200 switch (brightness
) {
202 if (led
->type
== IWL_LED_TRG_ASSOC
)
203 priv
->allow_blinking
= 1;
206 led
->led_on(priv
, IWL_LED_LINK
);
209 if (led
->type
== IWL_LED_TRG_ASSOC
)
210 priv
->allow_blinking
= 0;
213 led
->led_off(priv
, IWL_LED_LINK
);
216 if (led
->led_pattern
) {
217 int idx
= iwl_brightness_to_idx(brightness
);
218 led
->led_pattern(priv
, IWL_LED_LINK
, idx
);
227 * Register led class with the system
229 static int iwl_leds_register_led(struct iwl_priv
*priv
, struct iwl_led
*led
,
230 enum led_type type
, u8 set_led
,
231 const char *name
, char *trigger
)
233 struct device
*device
= wiphy_dev(priv
->hw
->wiphy
);
236 led
->led_dev
.name
= name
;
237 led
->led_dev
.brightness_set
= iwl_led_brightness_set
;
238 led
->led_dev
.default_trigger
= trigger
;
243 ret
= led_classdev_register(device
, &led
->led_dev
);
245 IWL_ERROR("Error: failed to register led handler.\n");
251 if (set_led
&& led
->led_on
)
252 led
->led_on(priv
, IWL_LED_LINK
);
259 * calculate blink rate according to last 2 sec Tx/Rx activities
261 static int iwl_get_blink_rate(struct iwl_priv
*priv
)
264 u64 current_tpt
= priv
->tx_stats
[2].bytes
;
265 /* FIXME: + priv->rx_stats[2].bytes; */
266 s64 tpt
= current_tpt
- priv
->led_tpt
;
268 if (tpt
< 0) /* wrapparound */
271 IWL_DEBUG_LED("tpt %lld current_tpt %llu\n",
273 (unsigned long long)current_tpt
);
274 priv
->led_tpt
= current_tpt
;
276 if (!priv
->allow_blinking
)
277 i
= IWL_MAX_BLINK_TBL
;
279 for (i
= 0; i
< IWL_MAX_BLINK_TBL
; i
++)
280 if (tpt
> (blink_tbl
[i
].tpt
* IWL_1MB_RATE
))
283 IWL_DEBUG_LED("LED BLINK IDX=%d", i
);
287 static inline int is_rf_kill(struct iwl_priv
*priv
)
289 return test_bit(STATUS_RF_KILL_HW
, &priv
->status
) ||
290 test_bit(STATUS_RF_KILL_SW
, &priv
->status
);
294 * this function called from handler. Since setting Led command can
295 * happen very frequent we postpone led command to be called from
296 * REPLY handler so we know ucode is up
298 void iwl_leds_background(struct iwl_priv
*priv
)
302 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
)) {
303 priv
->last_blink_time
= 0;
306 if (is_rf_kill(priv
)) {
307 priv
->last_blink_time
= 0;
311 if (!priv
->allow_blinking
) {
312 priv
->last_blink_time
= 0;
313 if (priv
->last_blink_rate
!= IWL_SOLID_BLINK_IDX
) {
314 priv
->last_blink_rate
= IWL_SOLID_BLINK_IDX
;
315 iwl4965_led_pattern(priv
, IWL_LED_LINK
,
316 IWL_SOLID_BLINK_IDX
);
320 if (!priv
->last_blink_time
||
321 !time_after(jiffies
, priv
->last_blink_time
+
322 msecs_to_jiffies(1000)))
325 blink_idx
= iwl_get_blink_rate(priv
);
327 /* call only if blink rate change */
328 if (blink_idx
!= priv
->last_blink_rate
)
329 iwl4965_led_pattern(priv
, IWL_LED_LINK
, blink_idx
);
331 priv
->last_blink_time
= jiffies
;
332 priv
->last_blink_rate
= blink_idx
;
334 EXPORT_SYMBOL(iwl_leds_background
);
336 /* Register all led handler */
337 int iwl_leds_register(struct iwl_priv
*priv
)
343 priv
->last_blink_rate
= 0;
345 priv
->last_blink_time
= 0;
346 priv
->allow_blinking
= 0;
348 trigger
= ieee80211_get_radio_led_name(priv
->hw
);
349 snprintf(name
, sizeof(name
), "iwl-%s:radio",
350 wiphy_name(priv
->hw
->wiphy
));
352 priv
->led
[IWL_LED_TRG_RADIO
].led_on
= iwl4965_led_on_reg
;
353 priv
->led
[IWL_LED_TRG_RADIO
].led_off
= iwl4965_led_off_reg
;
354 priv
->led
[IWL_LED_TRG_RADIO
].led_pattern
= NULL
;
356 ret
= iwl_leds_register_led(priv
, &priv
->led
[IWL_LED_TRG_RADIO
],
357 IWL_LED_TRG_RADIO
, 1, name
, trigger
);
361 trigger
= ieee80211_get_assoc_led_name(priv
->hw
);
362 snprintf(name
, sizeof(name
), "iwl-%s:assoc",
363 wiphy_name(priv
->hw
->wiphy
));
365 ret
= iwl_leds_register_led(priv
, &priv
->led
[IWL_LED_TRG_ASSOC
],
366 IWL_LED_TRG_ASSOC
, 0, name
, trigger
);
368 /* for assoc always turn led on */
369 priv
->led
[IWL_LED_TRG_ASSOC
].led_on
= iwl4965_led_on_reg
;
370 priv
->led
[IWL_LED_TRG_ASSOC
].led_off
= iwl4965_led_on_reg
;
371 priv
->led
[IWL_LED_TRG_ASSOC
].led_pattern
= NULL
;
376 trigger
= ieee80211_get_rx_led_name(priv
->hw
);
377 snprintf(name
, sizeof(name
), "iwl-%s:RX", wiphy_name(priv
->hw
->wiphy
));
380 ret
= iwl_leds_register_led(priv
, &priv
->led
[IWL_LED_TRG_RX
],
381 IWL_LED_TRG_RX
, 0, name
, trigger
);
383 priv
->led
[IWL_LED_TRG_RX
].led_on
= iwl_led_associated
;
384 priv
->led
[IWL_LED_TRG_RX
].led_off
= iwl_led_associated
;
385 priv
->led
[IWL_LED_TRG_RX
].led_pattern
= iwl4965_led_pattern
;
390 trigger
= ieee80211_get_tx_led_name(priv
->hw
);
391 snprintf(name
, sizeof(name
), "iwl-%s:TX", wiphy_name(priv
->hw
->wiphy
));
392 ret
= iwl_leds_register_led(priv
, &priv
->led
[IWL_LED_TRG_TX
],
393 IWL_LED_TRG_TX
, 0, name
, trigger
);
395 priv
->led
[IWL_LED_TRG_TX
].led_on
= iwl_led_associated
;
396 priv
->led
[IWL_LED_TRG_TX
].led_off
= iwl_led_associated
;
397 priv
->led
[IWL_LED_TRG_TX
].led_pattern
= iwl4965_led_pattern
;
405 iwl_leds_unregister(priv
);
408 EXPORT_SYMBOL(iwl_leds_register
);
410 /* unregister led class */
411 static void iwl_leds_unregister_led(struct iwl_led
*led
, u8 set_led
)
413 if (!led
->registered
)
416 led_classdev_unregister(&led
->led_dev
);
419 led
->led_dev
.brightness_set(&led
->led_dev
, LED_OFF
);
423 /* Unregister all led handlers */
424 void iwl_leds_unregister(struct iwl_priv
*priv
)
426 iwl_leds_unregister_led(&priv
->led
[IWL_LED_TRG_ASSOC
], 0);
427 iwl_leds_unregister_led(&priv
->led
[IWL_LED_TRG_RX
], 0);
428 iwl_leds_unregister_led(&priv
->led
[IWL_LED_TRG_TX
], 0);
429 iwl_leds_unregister_led(&priv
->led
[IWL_LED_TRG_RADIO
], 1);
431 EXPORT_SYMBOL(iwl_leds_unregister
);