iwlwifi: Traffic type and counter for debugFs
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-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
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>
40
41 #include "iwl-dev.h"
42 #include "iwl-core.h"
43 #include "iwl-io.h"
44
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),
51         NULL
52 };
53 #endif /* CONFIG_IWLWIFI_DEBUG */
54
55
56 static const struct {
57         u16 tpt;        /* Mb/s */
58         u8 on_time;
59         u8 off_time;
60 } blink_tbl[] =
61 {
62         {300, 25, 25},
63         {200, 40, 40},
64         {100, 55, 55},
65         {70, 65, 65},
66         {50, 75, 75},
67         {20, 85, 85},
68         {15, 95, 95 },
69         {10, 110, 110},
70         {5, 130, 130},
71         {0, 167, 167},
72 /* SOLID_ON */
73         {-1, IWL_LED_SOLID, 0}
74 };
75
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)
80
81 /*  [0-256] -> [0..8] FIXME: we need [0..10] */
82 static inline int iwl_brightness_to_idx(enum led_brightness brightness)
83 {
84         return fls(0x000000FF & (u32)brightness);
85 }
86
87 /* Send led command */
88 static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
89 {
90         struct iwl_host_cmd cmd = {
91                 .id = REPLY_LEDS_CMD,
92                 .len = sizeof(struct iwl_led_cmd),
93                 .data = led_cmd,
94                 .flags = CMD_ASYNC,
95                 .callback = NULL,
96         };
97         u32 reg;
98
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);
102
103         return iwl_send_cmd(priv, &cmd);
104 }
105
106 /* Set led pattern command */
107 static int iwl_led_pattern(struct iwl_priv *priv, int led_id,
108                                unsigned int idx)
109 {
110         struct iwl_led_cmd led_cmd = {
111                 .id = led_id,
112                 .interval = IWL_DEF_LED_INTRVL
113         };
114
115         BUG_ON(idx > IWL_MAX_BLINK_TBL);
116
117         led_cmd.on = blink_tbl[idx].on_time;
118         led_cmd.off = blink_tbl[idx].off_time;
119
120         return iwl_send_led_cmd(priv, &led_cmd);
121 }
122
123 /* Set led register off */
124 static int iwl_led_on_reg(struct iwl_priv *priv, int led_id)
125 {
126         IWL_DEBUG_LED(priv, "led on %d\n", led_id);
127         iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_ON);
128         return 0;
129 }
130
131 #if 0
132 /* Set led on command */
133 static int iwl_led_on(struct iwl_priv *priv, int led_id)
134 {
135         struct iwl_led_cmd led_cmd = {
136                 .id = led_id,
137                 .on = IWL_LED_SOLID,
138                 .off = 0,
139                 .interval = IWL_DEF_LED_INTRVL
140         };
141         return iwl_send_led_cmd(priv, &led_cmd);
142 }
143
144 /* Set led off command */
145 int iwl_led_off(struct iwl_priv *priv, int led_id)
146 {
147         struct iwl_led_cmd led_cmd = {
148                 .id = led_id,
149                 .on = 0,
150                 .off = 0,
151                 .interval = IWL_DEF_LED_INTRVL
152         };
153         IWL_DEBUG_LED(priv, "led off %d\n", led_id);
154         return iwl_send_led_cmd(priv, &led_cmd);
155 }
156 #endif
157
158
159 /* Set led register off */
160 static int iwl_led_off_reg(struct iwl_priv *priv, int led_id)
161 {
162         IWL_DEBUG_LED(priv, "LED Reg off\n");
163         iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_OFF);
164         return 0;
165 }
166
167 /*
168  * Set led register in case of disassociation according to rfkill state
169  */
170 static int iwl_led_associate(struct iwl_priv *priv, int led_id)
171 {
172         IWL_DEBUG_LED(priv, "Associated\n");
173         priv->allow_blinking = 1;
174         return iwl_led_on_reg(priv, led_id);
175 }
176 static int iwl_led_disassociate(struct iwl_priv *priv, int led_id)
177 {
178         priv->allow_blinking = 0;
179
180         return 0;
181 }
182
183 /*
184  * brightness call back function for Tx/Rx LED
185  */
186 static int iwl_led_associated(struct iwl_priv *priv, int led_id)
187 {
188         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
189             !test_bit(STATUS_READY, &priv->status))
190                 return 0;
191
192
193         /* start counting Tx/Rx bytes */
194         if (!priv->last_blink_time && priv->allow_blinking)
195                 priv->last_blink_time = jiffies;
196         return 0;
197 }
198
199 /*
200  * brightness call back for association and radio
201  */
202 static void iwl_led_brightness_set(struct led_classdev *led_cdev,
203                                        enum led_brightness brightness)
204 {
205         struct iwl_led *led = container_of(led_cdev, struct iwl_led, led_dev);
206         struct iwl_priv *priv = led->priv;
207
208         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
209                 return;
210
211
212         IWL_DEBUG_LED(priv, "Led type = %s brightness = %d\n",
213                         led_type_str[led->type], brightness);
214         switch (brightness) {
215         case LED_FULL:
216                 if (led->led_on)
217                         led->led_on(priv, IWL_LED_LINK);
218                 break;
219         case LED_OFF:
220                 if (led->led_off)
221                         led->led_off(priv, IWL_LED_LINK);
222                 break;
223         default:
224                 if (led->led_pattern) {
225                         int idx = iwl_brightness_to_idx(brightness);
226                         led->led_pattern(priv, IWL_LED_LINK, idx);
227                 }
228                 break;
229         }
230 }
231
232
233
234 /*
235  * Register led class with the system
236  */
237 static int iwl_leds_register_led(struct iwl_priv *priv, struct iwl_led *led,
238                                    enum led_type type, u8 set_led,
239                                    char *trigger)
240 {
241         struct device *device = wiphy_dev(priv->hw->wiphy);
242         int ret;
243
244         led->led_dev.name = led->name;
245         led->led_dev.brightness_set = iwl_led_brightness_set;
246         led->led_dev.default_trigger = trigger;
247
248         led->priv = priv;
249         led->type = type;
250
251         ret = led_classdev_register(device, &led->led_dev);
252         if (ret) {
253                 IWL_ERR(priv, "Error: failed to register led handler.\n");
254                 return ret;
255         }
256
257         led->registered = 1;
258
259         if (set_led && led->led_on)
260                 led->led_on(priv, IWL_LED_LINK);
261
262         return 0;
263 }
264
265
266 /*
267  * calculate blink rate according to last second Tx/Rx activities
268  */
269 static int iwl_get_blink_rate(struct iwl_priv *priv)
270 {
271         int i;
272         /* count both tx and rx traffic to be able to
273          * handle traffic in either direction
274          */
275         u64 current_tpt = priv->tx_stats.data_bytes +
276                           priv->rx_stats.data_bytes;
277         s64 tpt = current_tpt - priv->led_tpt;
278
279         if (tpt < 0) /* wraparound */
280                 tpt = -tpt;
281
282         IWL_DEBUG_LED(priv, "tpt %lld current_tpt %llu\n",
283                 (long long)tpt,
284                 (unsigned long long)current_tpt);
285         priv->led_tpt = current_tpt;
286
287         if (!priv->allow_blinking)
288                 i = IWL_MAX_BLINK_TBL;
289         else
290                 for (i = 0; i < IWL_MAX_BLINK_TBL; i++)
291                         if (tpt  > (blink_tbl[i].tpt * IWL_1MB_RATE))
292                                 break;
293
294         IWL_DEBUG_LED(priv, "LED BLINK IDX=%d\n", i);
295         return i;
296 }
297
298 /*
299  * this function called from handler. Since setting Led command can
300  * happen very frequent we postpone led command to be called from
301  * REPLY handler so we know ucode is up
302  */
303 void iwl_leds_background(struct iwl_priv *priv)
304 {
305         u8 blink_idx;
306
307         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
308                 priv->last_blink_time = 0;
309                 return;
310         }
311         if (iwl_is_rfkill(priv)) {
312                 priv->last_blink_time = 0;
313                 return;
314         }
315
316         if (!priv->allow_blinking) {
317                 priv->last_blink_time = 0;
318                 if (priv->last_blink_rate != IWL_SOLID_BLINK_IDX) {
319                         priv->last_blink_rate = IWL_SOLID_BLINK_IDX;
320                         iwl_led_pattern(priv, IWL_LED_LINK,
321                                             IWL_SOLID_BLINK_IDX);
322                 }
323                 return;
324         }
325         if (!priv->last_blink_time ||
326             !time_after(jiffies, priv->last_blink_time +
327                         msecs_to_jiffies(1000)))
328                 return;
329
330         blink_idx = iwl_get_blink_rate(priv);
331
332         /* call only if blink rate change */
333         if (blink_idx != priv->last_blink_rate)
334                 iwl_led_pattern(priv, IWL_LED_LINK, blink_idx);
335
336         priv->last_blink_time = jiffies;
337         priv->last_blink_rate = blink_idx;
338 }
339
340 /* Register all led handler */
341 int iwl_leds_register(struct iwl_priv *priv)
342 {
343         char *trigger;
344         int ret;
345
346         priv->last_blink_rate = 0;
347         priv->led_tpt = 0;
348         priv->last_blink_time = 0;
349         priv->allow_blinking = 0;
350
351         trigger = ieee80211_get_radio_led_name(priv->hw);
352         snprintf(priv->led[IWL_LED_TRG_RADIO].name,
353                  sizeof(priv->led[IWL_LED_TRG_RADIO].name), "iwl-%s::radio",
354                  wiphy_name(priv->hw->wiphy));
355
356         priv->led[IWL_LED_TRG_RADIO].led_on = iwl_led_on_reg;
357         priv->led[IWL_LED_TRG_RADIO].led_off = iwl_led_off_reg;
358         priv->led[IWL_LED_TRG_RADIO].led_pattern = NULL;
359
360         ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_RADIO],
361                                    IWL_LED_TRG_RADIO, 1, trigger);
362         if (ret)
363                 goto exit_fail;
364
365         trigger = ieee80211_get_assoc_led_name(priv->hw);
366         snprintf(priv->led[IWL_LED_TRG_ASSOC].name,
367                  sizeof(priv->led[IWL_LED_TRG_ASSOC].name), "iwl-%s::assoc",
368                  wiphy_name(priv->hw->wiphy));
369
370         ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_ASSOC],
371                                    IWL_LED_TRG_ASSOC, 0, trigger);
372
373         /* for assoc always turn led on */
374         priv->led[IWL_LED_TRG_ASSOC].led_on = iwl_led_associate;
375         priv->led[IWL_LED_TRG_ASSOC].led_off = iwl_led_disassociate;
376         priv->led[IWL_LED_TRG_ASSOC].led_pattern = NULL;
377
378         if (ret)
379                 goto exit_fail;
380
381         trigger = ieee80211_get_rx_led_name(priv->hw);
382         snprintf(priv->led[IWL_LED_TRG_RX].name,
383                  sizeof(priv->led[IWL_LED_TRG_RX].name), "iwl-%s::RX",
384                  wiphy_name(priv->hw->wiphy));
385
386         ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_RX],
387                                    IWL_LED_TRG_RX, 0, trigger);
388
389         priv->led[IWL_LED_TRG_RX].led_on = iwl_led_associated;
390         priv->led[IWL_LED_TRG_RX].led_off = iwl_led_associated;
391         priv->led[IWL_LED_TRG_RX].led_pattern = iwl_led_pattern;
392
393         if (ret)
394                 goto exit_fail;
395
396         trigger = ieee80211_get_tx_led_name(priv->hw);
397         snprintf(priv->led[IWL_LED_TRG_TX].name,
398                  sizeof(priv->led[IWL_LED_TRG_TX].name), "iwl-%s::TX",
399                  wiphy_name(priv->hw->wiphy));
400
401         ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_TX],
402                                    IWL_LED_TRG_TX, 0, trigger);
403
404         priv->led[IWL_LED_TRG_TX].led_on = iwl_led_associated;
405         priv->led[IWL_LED_TRG_TX].led_off = iwl_led_associated;
406         priv->led[IWL_LED_TRG_TX].led_pattern = iwl_led_pattern;
407
408         if (ret)
409                 goto exit_fail;
410
411         return 0;
412
413 exit_fail:
414         iwl_leds_unregister(priv);
415         return ret;
416 }
417 EXPORT_SYMBOL(iwl_leds_register);
418
419 /* unregister led class */
420 static void iwl_leds_unregister_led(struct iwl_led *led, u8 set_led)
421 {
422         if (!led->registered)
423                 return;
424
425         led_classdev_unregister(&led->led_dev);
426
427         if (set_led)
428                 led->led_dev.brightness_set(&led->led_dev, LED_OFF);
429         led->registered = 0;
430 }
431
432 /* Unregister all led handlers */
433 void iwl_leds_unregister(struct iwl_priv *priv)
434 {
435         iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_ASSOC], 0);
436         iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RX], 0);
437         iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_TX], 0);
438         iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RADIO], 1);
439 }
440 EXPORT_SYMBOL(iwl_leds_unregister);
441