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spi-topcliff-pch: add recovery processing in case wait-event timeout
[zen-stable.git] / drivers / net / wireless / libertas / cmd.c
blobd798bcc0d83a9561f8a8fdb68826d720de9fc970
1 /*
2 * This file contains the handling of command.
3 * It prepares command and sends it to firmware when it is ready.
4 */
5
6 #include <linux/hardirq.h>
7 #include <linux/kfifo.h>
8 #include <linux/sched.h>
9 #include <linux/slab.h>
10 #include <linux/if_arp.h>
11 #include <linux/export.h>
12
13 #include "decl.h"
14 #include "cfg.h"
15 #include "cmd.h"
16
17 #define CAL_NF(nf) ((s32)(-(s32)(nf)))
18 #define CAL_RSSI(snr, nf) ((s32)((s32)(snr) + CAL_NF(nf)))
19
20 /**
21 * lbs_cmd_copyback - Simple callback that copies response back into command
22 *
23 * @priv: A pointer to &struct lbs_private structure
24 * @extra: A pointer to the original command structure for which
25 * 'resp' is a response
26 * @resp: A pointer to the command response
27 *
28 * returns: 0 on success, error on failure
29 */
30 int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
31 struct cmd_header *resp)
32 {
33 struct cmd_header *buf = (void *)extra;
34 uint16_t copy_len;
35
36 copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
37 memcpy(buf, resp, copy_len);
38 return 0;
39 }
40 EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
41
42 /**
43 * lbs_cmd_async_callback - Simple callback that ignores the result.
44 * Use this if you just want to send a command to the hardware, but don't
45 * care for the result.
46 *
47 * @priv: ignored
48 * @extra: ignored
49 * @resp: ignored
50 *
51 * returns: 0 for success
52 */
53 static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
54 struct cmd_header *resp)
55 {
56 return 0;
57 }
58
59
60 /**
61 * is_command_allowed_in_ps - tests if a command is allowed in Power Save mode
62 *
63 * @cmd: the command ID
64 *
65 * returns: 1 if allowed, 0 if not allowed
66 */
67 static u8 is_command_allowed_in_ps(u16 cmd)
68 {
69 switch (cmd) {
70 case CMD_802_11_RSSI:
71 return 1;
72 case CMD_802_11_HOST_SLEEP_CFG:
73 return 1;
74 default:
75 break;
76 }
77 return 0;
78 }
79
80 /**
81 * lbs_update_hw_spec - Updates the hardware details like MAC address
82 * and regulatory region
83 *
84 * @priv: A pointer to &struct lbs_private structure
85 *
86 * returns: 0 on success, error on failure
87 */
88 int lbs_update_hw_spec(struct lbs_private *priv)
89 {
90 struct cmd_ds_get_hw_spec cmd;
91 int ret = -1;
92 u32 i;
93
94 lbs_deb_enter(LBS_DEB_CMD);
95
96 memset(&cmd, 0, sizeof(cmd));
97 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
98 memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
99 ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
100 if (ret)
101 goto out;
102
103 priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
104
105 /* The firmware release is in an interesting format: the patch
106 * level is in the most significant nibble ... so fix that: */
107 priv->fwrelease = le32_to_cpu(cmd.fwrelease);
108 priv->fwrelease = (priv->fwrelease << 8) |
109 (priv->fwrelease >> 24 & 0xff);
110
111 /* Some firmware capabilities:
112 * CF card firmware 5.0.16p0: cap 0x00000303
113 * USB dongle firmware 5.110.17p2: cap 0x00000303
114 */
115 netdev_info(priv->dev, "%pM, fw %u.%u.%up%u, cap 0x%08x\n",
116 cmd.permanentaddr,
117 priv->fwrelease >> 24 & 0xff,
118 priv->fwrelease >> 16 & 0xff,
119 priv->fwrelease >> 8 & 0xff,
120 priv->fwrelease & 0xff,
121 priv->fwcapinfo);
122 lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
123 cmd.hwifversion, cmd.version);
124
125 /* Clamp region code to 8-bit since FW spec indicates that it should
126 * only ever be 8-bit, even though the field size is 16-bit. Some firmware
127 * returns non-zero high 8 bits here.
128 *
129 * Firmware version 4.0.102 used in CF8381 has region code shifted. We
130 * need to check for this problem and handle it properly.
131 */
132 if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
133 priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
134 else
135 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
136
137 for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
138 /* use the region code to search for the index */
139 if (priv->regioncode == lbs_region_code_to_index[i])
140 break;
141 }
142
143 /* if it's unidentified region code, use the default (USA) */
144 if (i >= MRVDRV_MAX_REGION_CODE) {
145 priv->regioncode = 0x10;
146 netdev_info(priv->dev,
147 "unidentified region code; using the default (USA)\n");
148 }
149
150 if (priv->current_addr[0] == 0xff)
151 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
152
153 if (!priv->copied_hwaddr) {
154 memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
155 if (priv->mesh_dev)
156 memcpy(priv->mesh_dev->dev_addr,
157 priv->current_addr, ETH_ALEN);
158 priv->copied_hwaddr = 1;
159 }
160
161 out:
162 lbs_deb_leave(LBS_DEB_CMD);
163 return ret;
164 }
165
166 static int lbs_ret_host_sleep_cfg(struct lbs_private *priv, unsigned long dummy,
167 struct cmd_header *resp)
168 {
169 lbs_deb_enter(LBS_DEB_CMD);
170 if (priv->is_host_sleep_activated) {
171 priv->is_host_sleep_configured = 0;
172 if (priv->psstate == PS_STATE_FULL_POWER) {
173 priv->is_host_sleep_activated = 0;
174 wake_up_interruptible(&priv->host_sleep_q);
175 }
176 } else {
177 priv->is_host_sleep_configured = 1;
178 }
179 lbs_deb_leave(LBS_DEB_CMD);
180 return 0;
181 }
182
183 int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
184 struct wol_config *p_wol_config)
185 {
186 struct cmd_ds_host_sleep cmd_config;
187 int ret;
188
189 /*
190 * Certain firmware versions do not support EHS_REMOVE_WAKEUP command
191 * and the card will return a failure. Since we need to be
192 * able to reset the mask, in those cases we set a 0 mask instead.
193 */
194 if (criteria == EHS_REMOVE_WAKEUP && !priv->ehs_remove_supported)
195 criteria = 0;
196
197 cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
198 cmd_config.criteria = cpu_to_le32(criteria);
199 cmd_config.gpio = priv->wol_gpio;
200 cmd_config.gap = priv->wol_gap;
201
202 if (p_wol_config != NULL)
203 memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
204 sizeof(struct wol_config));
205 else
206 cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
207
208 ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config.hdr,
209 le16_to_cpu(cmd_config.hdr.size),
210 lbs_ret_host_sleep_cfg, 0);
211 if (!ret) {
212 if (p_wol_config)
213 memcpy((uint8_t *) p_wol_config,
214 (uint8_t *)&cmd_config.wol_conf,
215 sizeof(struct wol_config));
216 } else {
217 netdev_info(priv->dev, "HOST_SLEEP_CFG failed %d\n", ret);
218 }
219
220 return ret;
221 }
222 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
223
224 /**
225 * lbs_set_ps_mode - Sets the Power Save mode
226 *
227 * @priv: A pointer to &struct lbs_private structure
228 * @cmd_action: The Power Save operation (PS_MODE_ACTION_ENTER_PS or
229 * PS_MODE_ACTION_EXIT_PS)
230 * @block: Whether to block on a response or not
231 *
232 * returns: 0 on success, error on failure
233 */
234 int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block)
235 {
236 struct cmd_ds_802_11_ps_mode cmd;
237 int ret = 0;
238
239 lbs_deb_enter(LBS_DEB_CMD);
240
241 memset(&cmd, 0, sizeof(cmd));
242 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
243 cmd.action = cpu_to_le16(cmd_action);
244
245 if (cmd_action == PS_MODE_ACTION_ENTER_PS) {
246 lbs_deb_cmd("PS_MODE: action ENTER_PS\n");
247 cmd.multipledtim = cpu_to_le16(1); /* Default DTIM multiple */
248 } else if (cmd_action == PS_MODE_ACTION_EXIT_PS) {
249 lbs_deb_cmd("PS_MODE: action EXIT_PS\n");
250 } else {
251 /* We don't handle CONFIRM_SLEEP here because it needs to
252 * be fastpathed to the firmware.
253 */
254 lbs_deb_cmd("PS_MODE: unknown action 0x%X\n", cmd_action);
255 ret = -EOPNOTSUPP;
256 goto out;
257 }
258
259 if (block)
260 ret = lbs_cmd_with_response(priv, CMD_802_11_PS_MODE, &cmd);
261 else
262 lbs_cmd_async(priv, CMD_802_11_PS_MODE, &cmd.hdr, sizeof (cmd));
263
264 out:
265 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
266 return ret;
267 }
268
269 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
270 struct sleep_params *sp)
271 {
272 struct cmd_ds_802_11_sleep_params cmd;
273 int ret;
274
275 lbs_deb_enter(LBS_DEB_CMD);
276
277 if (cmd_action == CMD_ACT_GET) {
278 memset(&cmd, 0, sizeof(cmd));
279 } else {
280 cmd.error = cpu_to_le16(sp->sp_error);
281 cmd.offset = cpu_to_le16(sp->sp_offset);
282 cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
283 cmd.calcontrol = sp->sp_calcontrol;
284 cmd.externalsleepclk = sp->sp_extsleepclk;
285 cmd.reserved = cpu_to_le16(sp->sp_reserved);
286 }
287 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
288 cmd.action = cpu_to_le16(cmd_action);
289
290 ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
291
292 if (!ret) {
293 lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
294 "calcontrol 0x%x extsleepclk 0x%x\n",
295 le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
296 le16_to_cpu(cmd.stabletime), cmd.calcontrol,
297 cmd.externalsleepclk);
298
299 sp->sp_error = le16_to_cpu(cmd.error);
300 sp->sp_offset = le16_to_cpu(cmd.offset);
301 sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
302 sp->sp_calcontrol = cmd.calcontrol;
303 sp->sp_extsleepclk = cmd.externalsleepclk;
304 sp->sp_reserved = le16_to_cpu(cmd.reserved);
305 }
306
307 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
308 return 0;
309 }
310
311 static int lbs_wait_for_ds_awake(struct lbs_private *priv)
312 {
313 int ret = 0;
314
315 lbs_deb_enter(LBS_DEB_CMD);
316
317 if (priv->is_deep_sleep) {
318 if (!wait_event_interruptible_timeout(priv->ds_awake_q,
319 !priv->is_deep_sleep, (10 * HZ))) {
320 netdev_err(priv->dev, "ds_awake_q: timer expired\n");
321 ret = -1;
322 }
323 }
324
325 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
326 return ret;
327 }
328
329 int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
330 {
331 int ret = 0;
332
333 lbs_deb_enter(LBS_DEB_CMD);
334
335 if (deep_sleep) {
336 if (priv->is_deep_sleep != 1) {
337 lbs_deb_cmd("deep sleep: sleep\n");
338 BUG_ON(!priv->enter_deep_sleep);
339 ret = priv->enter_deep_sleep(priv);
340 if (!ret) {
341 netif_stop_queue(priv->dev);
342 netif_carrier_off(priv->dev);
343 }
344 } else {
345 netdev_err(priv->dev, "deep sleep: already enabled\n");
346 }
347 } else {
348 if (priv->is_deep_sleep) {
349 lbs_deb_cmd("deep sleep: wakeup\n");
350 BUG_ON(!priv->exit_deep_sleep);
351 ret = priv->exit_deep_sleep(priv);
352 if (!ret) {
353 ret = lbs_wait_for_ds_awake(priv);
354 if (ret)
355 netdev_err(priv->dev,
356 "deep sleep: wakeup failed\n");
357 }
358 }
359 }
360
361 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
362 return ret;
363 }
364
365 static int lbs_ret_host_sleep_activate(struct lbs_private *priv,
366 unsigned long dummy,
367 struct cmd_header *cmd)
368 {
369 lbs_deb_enter(LBS_DEB_FW);
370 priv->is_host_sleep_activated = 1;
371 wake_up_interruptible(&priv->host_sleep_q);
372 lbs_deb_leave(LBS_DEB_FW);
373 return 0;
374 }
375
376 int lbs_set_host_sleep(struct lbs_private *priv, int host_sleep)
377 {
378 struct cmd_header cmd;
379 int ret = 0;
380 uint32_t criteria = EHS_REMOVE_WAKEUP;
381
382 lbs_deb_enter(LBS_DEB_CMD);
383
384 if (host_sleep) {
385 if (priv->is_host_sleep_activated != 1) {
386 memset(&cmd, 0, sizeof(cmd));
387 ret = lbs_host_sleep_cfg(priv, priv->wol_criteria,
388 (struct wol_config *)NULL);
389 if (ret) {
390 netdev_info(priv->dev,
391 "Host sleep configuration failed: %d\n",
392 ret);
393 return ret;
394 }
395 if (priv->psstate == PS_STATE_FULL_POWER) {
396 ret = __lbs_cmd(priv,
397 CMD_802_11_HOST_SLEEP_ACTIVATE,
398 &cmd,
399 sizeof(cmd),
400 lbs_ret_host_sleep_activate, 0);
401 if (ret)
402 netdev_info(priv->dev,
403 "HOST_SLEEP_ACTIVATE failed: %d\n",
404 ret);
405 }
406
407 if (!wait_event_interruptible_timeout(
408 priv->host_sleep_q,
409 priv->is_host_sleep_activated,
410 (10 * HZ))) {
411 netdev_err(priv->dev,
412 "host_sleep_q: timer expired\n");
413 ret = -1;
414 }
415 } else {
416 netdev_err(priv->dev, "host sleep: already enabled\n");
417 }
418 } else {
419 if (priv->is_host_sleep_activated)
420 ret = lbs_host_sleep_cfg(priv, criteria,
421 (struct wol_config *)NULL);
422 }
423
424 return ret;
425 }
426
427 /**
428 * lbs_set_snmp_mib - Set an SNMP MIB value
429 *
430 * @priv: A pointer to &struct lbs_private structure
431 * @oid: The OID to set in the firmware
432 * @val: Value to set the OID to
433 *
434 * returns: 0 on success, error on failure
435 */
436 int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
437 {
438 struct cmd_ds_802_11_snmp_mib cmd;
439 int ret;
440
441 lbs_deb_enter(LBS_DEB_CMD);
442
443 memset(&cmd, 0, sizeof (cmd));
444 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
445 cmd.action = cpu_to_le16(CMD_ACT_SET);
446 cmd.oid = cpu_to_le16((u16) oid);
447
448 switch (oid) {
449 case SNMP_MIB_OID_BSS_TYPE:
450 cmd.bufsize = cpu_to_le16(sizeof(u8));
451 cmd.value[0] = val;
452 break;
453 case SNMP_MIB_OID_11D_ENABLE:
454 case SNMP_MIB_OID_FRAG_THRESHOLD:
455 case SNMP_MIB_OID_RTS_THRESHOLD:
456 case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
457 case SNMP_MIB_OID_LONG_RETRY_LIMIT:
458 cmd.bufsize = cpu_to_le16(sizeof(u16));
459 *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
460 break;
461 default:
462 lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
463 ret = -EINVAL;
464 goto out;
465 }
466
467 lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
468 le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
469
470 ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
471
472 out:
473 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
474 return ret;
475 }
476
477 /**
478 * lbs_get_snmp_mib - Get an SNMP MIB value
479 *
480 * @priv: A pointer to &struct lbs_private structure
481 * @oid: The OID to retrieve from the firmware
482 * @out_val: Location for the returned value
483 *
484 * returns: 0 on success, error on failure
485 */
486 int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
487 {
488 struct cmd_ds_802_11_snmp_mib cmd;
489 int ret;
490
491 lbs_deb_enter(LBS_DEB_CMD);
492
493 memset(&cmd, 0, sizeof (cmd));
494 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
495 cmd.action = cpu_to_le16(CMD_ACT_GET);
496 cmd.oid = cpu_to_le16(oid);
497
498 ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
499 if (ret)
500 goto out;
501
502 switch (le16_to_cpu(cmd.bufsize)) {
503 case sizeof(u8):
504 *out_val = cmd.value[0];
505 break;
506 case sizeof(u16):
507 *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
508 break;
509 default:
510 lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
511 oid, le16_to_cpu(cmd.bufsize));
512 break;
513 }
514
515 out:
516 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
517 return ret;
518 }
519
520 /**
521 * lbs_get_tx_power - Get the min, max, and current TX power
522 *
523 * @priv: A pointer to &struct lbs_private structure
524 * @curlevel: Current power level in dBm
525 * @minlevel: Minimum supported power level in dBm (optional)
526 * @maxlevel: Maximum supported power level in dBm (optional)
527 *
528 * returns: 0 on success, error on failure
529 */
530 int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
531 s16 *maxlevel)
532 {
533 struct cmd_ds_802_11_rf_tx_power cmd;
534 int ret;
535
536 lbs_deb_enter(LBS_DEB_CMD);
537
538 memset(&cmd, 0, sizeof(cmd));
539 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
540 cmd.action = cpu_to_le16(CMD_ACT_GET);
541
542 ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
543 if (ret == 0) {
544 *curlevel = le16_to_cpu(cmd.curlevel);
545 if (minlevel)
546 *minlevel = cmd.minlevel;
547 if (maxlevel)
548 *maxlevel = cmd.maxlevel;
549 }
550
551 lbs_deb_leave(LBS_DEB_CMD);
552 return ret;
553 }
554
555 /**
556 * lbs_set_tx_power - Set the TX power
557 *
558 * @priv: A pointer to &struct lbs_private structure
559 * @dbm: The desired power level in dBm
560 *
561 * returns: 0 on success, error on failure
562 */
563 int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
564 {
565 struct cmd_ds_802_11_rf_tx_power cmd;
566 int ret;
567
568 lbs_deb_enter(LBS_DEB_CMD);
569
570 memset(&cmd, 0, sizeof(cmd));
571 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
572 cmd.action = cpu_to_le16(CMD_ACT_SET);
573 cmd.curlevel = cpu_to_le16(dbm);
574
575 lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
576
577 ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
578
579 lbs_deb_leave(LBS_DEB_CMD);
580 return ret;
581 }
582
583 /**
584 * lbs_set_monitor_mode - Enable or disable monitor mode
585 * (only implemented on OLPC usb8388 FW)
586 *
587 * @priv: A pointer to &struct lbs_private structure
588 * @enable: 1 to enable monitor mode, 0 to disable
589 *
590 * returns: 0 on success, error on failure
591 */
592 int lbs_set_monitor_mode(struct lbs_private *priv, int enable)
593 {
594 struct cmd_ds_802_11_monitor_mode cmd;
595 int ret;
596
597 memset(&cmd, 0, sizeof(cmd));
598 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
599 cmd.action = cpu_to_le16(CMD_ACT_SET);
600 if (enable)
601 cmd.mode = cpu_to_le16(0x1);
602
603 lbs_deb_cmd("SET_MONITOR_MODE: %d\n", enable);
604
605 ret = lbs_cmd_with_response(priv, CMD_802_11_MONITOR_MODE, &cmd);
606 if (ret == 0) {
607 priv->dev->type = enable ? ARPHRD_IEEE80211_RADIOTAP :
608 ARPHRD_ETHER;
609 }
610
611 lbs_deb_leave(LBS_DEB_CMD);
612 return ret;
613 }
614
615 /**
616 * lbs_get_channel - Get the radio channel
617 *
618 * @priv: A pointer to &struct lbs_private structure
619 *
620 * returns: The channel on success, error on failure
621 */
622 static int lbs_get_channel(struct lbs_private *priv)
623 {
624 struct cmd_ds_802_11_rf_channel cmd;
625 int ret = 0;
626
627 lbs_deb_enter(LBS_DEB_CMD);
628
629 memset(&cmd, 0, sizeof(cmd));
630 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
631 cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
632
633 ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
634 if (ret)
635 goto out;
636
637 ret = le16_to_cpu(cmd.channel);
638 lbs_deb_cmd("current radio channel is %d\n", ret);
639
640 out:
641 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
642 return ret;
643 }
644
645 int lbs_update_channel(struct lbs_private *priv)
646 {
647 int ret;
648
649 /* the channel in f/w could be out of sync; get the current channel */
650 lbs_deb_enter(LBS_DEB_ASSOC);
651
652 ret = lbs_get_channel(priv);
653 if (ret > 0) {
654 priv->channel = ret;
655 ret = 0;
656 }
657 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
658 return ret;
659 }
660
661 /**
662 * lbs_set_channel - Set the radio channel
663 *
664 * @priv: A pointer to &struct lbs_private structure
665 * @channel: The desired channel, or 0 to clear a locked channel
666 *
667 * returns: 0 on success, error on failure
668 */
669 int lbs_set_channel(struct lbs_private *priv, u8 channel)
670 {
671 struct cmd_ds_802_11_rf_channel cmd;
672 #ifdef DEBUG
673 u8 old_channel = priv->channel;
674 #endif
675 int ret = 0;
676
677 lbs_deb_enter(LBS_DEB_CMD);
678
679 memset(&cmd, 0, sizeof(cmd));
680 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
681 cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
682 cmd.channel = cpu_to_le16(channel);
683
684 ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
685 if (ret)
686 goto out;
687
688 priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
689 lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
690 priv->channel);
691
692 out:
693 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
694 return ret;
695 }
696
697 /**
698 * lbs_get_rssi - Get current RSSI and noise floor
699 *
700 * @priv: A pointer to &struct lbs_private structure
701 * @rssi: On successful return, signal level in mBm
702 * @nf: On successful return, Noise floor
703 *
704 * returns: The channel on success, error on failure
705 */
706 int lbs_get_rssi(struct lbs_private *priv, s8 *rssi, s8 *nf)
707 {
708 struct cmd_ds_802_11_rssi cmd;
709 int ret = 0;
710
711 lbs_deb_enter(LBS_DEB_CMD);
712
713 BUG_ON(rssi == NULL);
714 BUG_ON(nf == NULL);
715
716 memset(&cmd, 0, sizeof(cmd));
717 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
718 /* Average SNR over last 8 beacons */
719 cmd.n_or_snr = cpu_to_le16(8);
720
721 ret = lbs_cmd_with_response(priv, CMD_802_11_RSSI, &cmd);
722 if (ret == 0) {
723 *nf = CAL_NF(le16_to_cpu(cmd.nf));
724 *rssi = CAL_RSSI(le16_to_cpu(cmd.n_or_snr), le16_to_cpu(cmd.nf));
725 }
726
727 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
728 return ret;
729 }
730
731 /**
732 * lbs_set_11d_domain_info - Send regulatory and 802.11d domain information
733 * to the firmware
734 *
735 * @priv: pointer to &struct lbs_private
736 * @request: cfg80211 regulatory request structure
737 * @bands: the device's supported bands and channels
738 *
739 * returns: 0 on success, error code on failure
740 */
741 int lbs_set_11d_domain_info(struct lbs_private *priv,
742 struct regulatory_request *request,
743 struct ieee80211_supported_band **bands)
744 {
745 struct cmd_ds_802_11d_domain_info cmd;
746 struct mrvl_ie_domain_param_set *domain = &cmd.domain;
747 struct ieee80211_country_ie_triplet *t;
748 enum ieee80211_band band;
749 struct ieee80211_channel *ch;
750 u8 num_triplet = 0;
751 u8 num_parsed_chan = 0;
752 u8 first_channel = 0, next_chan = 0, max_pwr = 0;
753 u8 i, flag = 0;
754 size_t triplet_size;
755 int ret;
756
757 lbs_deb_enter(LBS_DEB_11D);
758
759 memset(&cmd, 0, sizeof(cmd));
760 cmd.action = cpu_to_le16(CMD_ACT_SET);
761
762 lbs_deb_11d("Setting country code '%c%c'\n",
763 request->alpha2[0], request->alpha2[1]);
764
765 domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);
766
767 /* Set country code */
768 domain->country_code[0] = request->alpha2[0];
769 domain->country_code[1] = request->alpha2[1];
770 domain->country_code[2] = ' ';
771
772 /* Now set up the channel triplets; firmware is somewhat picky here
773 * and doesn't validate channel numbers and spans; hence it would
774 * interpret a triplet of (36, 4, 20) as channels 36, 37, 38, 39. Since
775 * the last 3 aren't valid channels, the driver is responsible for
776 * splitting that up into 4 triplet pairs of (36, 1, 20) + (40, 1, 20)
777 * etc.
778 */
779 for (band = 0;
780 (band < IEEE80211_NUM_BANDS) && (num_triplet < MAX_11D_TRIPLETS);
781 band++) {
782
783 if (!bands[band])
784 continue;
785
786 for (i = 0;
787 (i < bands[band]->n_channels) && (num_triplet < MAX_11D_TRIPLETS);
788 i++) {
789 ch = &bands[band]->channels[i];
790 if (ch->flags & IEEE80211_CHAN_DISABLED)
791 continue;
792
793 if (!flag) {
794 flag = 1;
795 next_chan = first_channel = (u32) ch->hw_value;
796 max_pwr = ch->max_power;
797 num_parsed_chan = 1;
798 continue;
799 }
800
801 if ((ch->hw_value == next_chan + 1) &&
802 (ch->max_power == max_pwr)) {
803 /* Consolidate adjacent channels */
804 next_chan++;
805 num_parsed_chan++;
806 } else {
807 /* Add this triplet */
808 lbs_deb_11d("11D triplet (%d, %d, %d)\n",
809 first_channel, num_parsed_chan,
810 max_pwr);
811 t = &domain->triplet[num_triplet];
812 t->chans.first_channel = first_channel;
813 t->chans.num_channels = num_parsed_chan;
814 t->chans.max_power = max_pwr;
815 num_triplet++;
816 flag = 0;
817 }
818 }
819
820 if (flag) {
821 /* Add last triplet */
822 lbs_deb_11d("11D triplet (%d, %d, %d)\n", first_channel,
823 num_parsed_chan, max_pwr);
824 t = &domain->triplet[num_triplet];
825 t->chans.first_channel = first_channel;
826 t->chans.num_channels = num_parsed_chan;
827 t->chans.max_power = max_pwr;
828 num_triplet++;
829 }
830 }
831
832 lbs_deb_11d("# triplets %d\n", num_triplet);
833
834 /* Set command header sizes */
835 triplet_size = num_triplet * sizeof(struct ieee80211_country_ie_triplet);
836 domain->header.len = cpu_to_le16(sizeof(domain->country_code) +
837 triplet_size);
838
839 lbs_deb_hex(LBS_DEB_11D, "802.11D domain param set",
840 (u8 *) &cmd.domain.country_code,
841 le16_to_cpu(domain->header.len));
842
843 cmd.hdr.size = cpu_to_le16(sizeof(cmd.hdr) +
844 sizeof(cmd.action) +
845 sizeof(cmd.domain.header) +
846 sizeof(cmd.domain.country_code) +
847 triplet_size);
848
849 ret = lbs_cmd_with_response(priv, CMD_802_11D_DOMAIN_INFO, &cmd);
850
851 lbs_deb_leave_args(LBS_DEB_11D, "ret %d", ret);
852 return ret;
853 }
854
855 /**
856 * lbs_get_reg - Read a MAC, Baseband, or RF register
857 *
858 * @priv: pointer to &struct lbs_private
859 * @reg: register command, one of CMD_MAC_REG_ACCESS,
860 * CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
861 * @offset: byte offset of the register to get
862 * @value: on success, the value of the register at 'offset'
863 *
864 * returns: 0 on success, error code on failure
865 */
866 int lbs_get_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 *value)
867 {
868 struct cmd_ds_reg_access cmd;
869 int ret = 0;
870
871 lbs_deb_enter(LBS_DEB_CMD);
872
873 BUG_ON(value == NULL);
874
875 memset(&cmd, 0, sizeof(cmd));
876 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
877 cmd.action = cpu_to_le16(CMD_ACT_GET);
878 cmd.offset = cpu_to_le16(offset);
879
880 if (reg != CMD_MAC_REG_ACCESS &&
881 reg != CMD_BBP_REG_ACCESS &&
882 reg != CMD_RF_REG_ACCESS) {
883 ret = -EINVAL;
884 goto out;
885 }
886
887 ret = lbs_cmd_with_response(priv, reg, &cmd);
888 if (!ret) {
889 if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
890 *value = cmd.value.bbp_rf;
891 else if (reg == CMD_MAC_REG_ACCESS)
892 *value = le32_to_cpu(cmd.value.mac);
893 }
894
895 out:
896 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
897 return ret;
898 }
899
900 /**
901 * lbs_set_reg - Write a MAC, Baseband, or RF register
902 *
903 * @priv: pointer to &struct lbs_private
904 * @reg: register command, one of CMD_MAC_REG_ACCESS,
905 * CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
906 * @offset: byte offset of the register to set
907 * @value: the value to write to the register at 'offset'
908 *
909 * returns: 0 on success, error code on failure
910 */
911 int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value)
912 {
913 struct cmd_ds_reg_access cmd;
914 int ret = 0;
915
916 lbs_deb_enter(LBS_DEB_CMD);
917
918 memset(&cmd, 0, sizeof(cmd));
919 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
920 cmd.action = cpu_to_le16(CMD_ACT_SET);
921 cmd.offset = cpu_to_le16(offset);
922
923 if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
924 cmd.value.bbp_rf = (u8) (value & 0xFF);
925 else if (reg == CMD_MAC_REG_ACCESS)
926 cmd.value.mac = cpu_to_le32(value);
927 else {
928 ret = -EINVAL;
929 goto out;
930 }
931
932 ret = lbs_cmd_with_response(priv, reg, &cmd);
933
934 out:
935 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
936 return ret;
937 }
938
939 static void lbs_queue_cmd(struct lbs_private *priv,
940 struct cmd_ctrl_node *cmdnode)
941 {
942 unsigned long flags;
943 int addtail = 1;
944
945 lbs_deb_enter(LBS_DEB_HOST);
946
947 if (!cmdnode) {
948 lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
949 goto done;
950 }
951 if (!cmdnode->cmdbuf->size) {
952 lbs_deb_host("DNLD_CMD: cmd size is zero\n");
953 goto done;
954 }
955 cmdnode->result = 0;
956
957 /* Exit_PS command needs to be queued in the header always. */
958 if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
959 struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf;
960
961 if (psm->action == cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
962 if (priv->psstate != PS_STATE_FULL_POWER)
963 addtail = 0;
964 }
965 }
966
967 if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_WAKEUP_CONFIRM)
968 addtail = 0;
969
970 spin_lock_irqsave(&priv->driver_lock, flags);
971
972 if (addtail)
973 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
974 else
975 list_add(&cmdnode->list, &priv->cmdpendingq);
976
977 spin_unlock_irqrestore(&priv->driver_lock, flags);
978
979 lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
980 le16_to_cpu(cmdnode->cmdbuf->command));
981
982 done:
983 lbs_deb_leave(LBS_DEB_HOST);
984 }
985
986 static void lbs_submit_command(struct lbs_private *priv,
987 struct cmd_ctrl_node *cmdnode)
988 {
989 unsigned long flags;
990 struct cmd_header *cmd;
991 uint16_t cmdsize;
992 uint16_t command;
993 int timeo = 3 * HZ;
994 int ret;
995
996 lbs_deb_enter(LBS_DEB_HOST);
997
998 cmd = cmdnode->cmdbuf;
999
1000 spin_lock_irqsave(&priv->driver_lock, flags);
1001 priv->seqnum++;
1002 cmd->seqnum = cpu_to_le16(priv->seqnum);
1003 priv->cur_cmd = cmdnode;
1004 spin_unlock_irqrestore(&priv->driver_lock, flags);
1005
1006 cmdsize = le16_to_cpu(cmd->size);
1007 command = le16_to_cpu(cmd->command);
1008
1009 /* These commands take longer */
1010 if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
1011 timeo = 5 * HZ;
1012
1013 lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
1014 command, le16_to_cpu(cmd->seqnum), cmdsize);
1015 lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
1016
1017 ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
1018
1019 if (ret) {
1020 netdev_info(priv->dev, "DNLD_CMD: hw_host_to_card failed: %d\n",
1021 ret);
1022 /* Let the timer kick in and retry, and potentially reset
1023 the whole thing if the condition persists */
1024 timeo = HZ/4;
1025 }
1026
1027 if (command == CMD_802_11_DEEP_SLEEP) {
1028 if (priv->is_auto_deep_sleep_enabled) {
1029 priv->wakeup_dev_required = 1;
1030 priv->dnld_sent = 0;
1031 }
1032 priv->is_deep_sleep = 1;
1033 lbs_complete_command(priv, cmdnode, 0);
1034 } else {
1035 /* Setup the timer after transmit command */
1036 mod_timer(&priv->command_timer, jiffies + timeo);
1037 }
1038
1039 lbs_deb_leave(LBS_DEB_HOST);
1040 }
1041
1042 /*
1043 * This function inserts command node to cmdfreeq
1044 * after cleans it. Requires priv->driver_lock held.
1045 */
1046 static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1047 struct cmd_ctrl_node *cmdnode)
1048 {
1049 lbs_deb_enter(LBS_DEB_HOST);
1050
1051 if (!cmdnode)
1052 goto out;
1053
1054 cmdnode->callback = NULL;
1055 cmdnode->callback_arg = 0;
1056
1057 memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
1058
1059 list_add_tail(&cmdnode->list, &priv->cmdfreeq);
1060 out:
1061 lbs_deb_leave(LBS_DEB_HOST);
1062 }
1063
1064 static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1065 struct cmd_ctrl_node *ptempcmd)
1066 {
1067 unsigned long flags;
1068
1069 spin_lock_irqsave(&priv->driver_lock, flags);
1070 __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
1071 spin_unlock_irqrestore(&priv->driver_lock, flags);
1072 }
1073
1074 void __lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1075 int result)
1076 {
1077 /*
1078 * Normally, commands are removed from cmdpendingq before being
1079 * submitted. However, we can arrive here on alternative codepaths
1080 * where the command is still pending. Make sure the command really
1081 * isn't part of a list at this point.
1082 */
1083 list_del_init(&cmd->list);
1084
1085 cmd->result = result;
1086 cmd->cmdwaitqwoken = 1;
1087 wake_up(&cmd->cmdwait_q);
1088
1089 if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
1090 __lbs_cleanup_and_insert_cmd(priv, cmd);
1091 priv->cur_cmd = NULL;
1092 wake_up(&priv->waitq);
1093 }
1094
1095 void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1096 int result)
1097 {
1098 unsigned long flags;
1099 spin_lock_irqsave(&priv->driver_lock, flags);
1100 __lbs_complete_command(priv, cmd, result);
1101 spin_unlock_irqrestore(&priv->driver_lock, flags);
1102 }
1103
1104 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
1105 {
1106 struct cmd_ds_802_11_radio_control cmd;
1107 int ret = -EINVAL;
1108
1109 lbs_deb_enter(LBS_DEB_CMD);
1110
1111 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1112 cmd.action = cpu_to_le16(CMD_ACT_SET);
1113
1114 /* Only v8 and below support setting the preamble */
1115 if (priv->fwrelease < 0x09000000) {
1116 switch (preamble) {
1117 case RADIO_PREAMBLE_SHORT:
1118 case RADIO_PREAMBLE_AUTO:
1119 case RADIO_PREAMBLE_LONG:
1120 cmd.control = cpu_to_le16(preamble);
1121 break;
1122 default:
1123 goto out;
1124 }
1125 }
1126
1127 if (radio_on)
1128 cmd.control |= cpu_to_le16(0x1);
1129 else {
1130 cmd.control &= cpu_to_le16(~0x1);
1131 priv->txpower_cur = 0;
1132 }
1133
1134 lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
1135 radio_on ? "ON" : "OFF", preamble);
1136
1137 priv->radio_on = radio_on;
1138
1139 ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
1140
1141 out:
1142 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
1143 return ret;
1144 }
1145
1146 void lbs_set_mac_control(struct lbs_private *priv)
1147 {
1148 struct cmd_ds_mac_control cmd;
1149
1150 lbs_deb_enter(LBS_DEB_CMD);
1151
1152 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1153 cmd.action = cpu_to_le16(priv->mac_control);
1154 cmd.reserved = 0;
1155
1156 lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
1157
1158 lbs_deb_leave(LBS_DEB_CMD);
1159 }
1160
1161 /**
1162 * lbs_allocate_cmd_buffer - allocates the command buffer and links
1163 * it to command free queue
1164 *
1165 * @priv: A pointer to &struct lbs_private structure
1166 *
1167 * returns: 0 for success or -1 on error
1168 */
1169 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1170 {
1171 int ret = 0;
1172 u32 bufsize;
1173 u32 i;
1174 struct cmd_ctrl_node *cmdarray;
1175
1176 lbs_deb_enter(LBS_DEB_HOST);
1177
1178 /* Allocate and initialize the command array */
1179 bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1180 if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1181 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1182 ret = -1;
1183 goto done;
1184 }
1185 priv->cmd_array = cmdarray;
1186
1187 /* Allocate and initialize each command buffer in the command array */
1188 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1189 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1190 if (!cmdarray[i].cmdbuf) {
1191 lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1192 ret = -1;
1193 goto done;
1194 }
1195 }
1196
1197 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1198 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1199 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1200 }
1201 ret = 0;
1202
1203 done:
1204 lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1205 return ret;
1206 }
1207
1208 /**
1209 * lbs_free_cmd_buffer - free the command buffer
1210 *
1211 * @priv: A pointer to &struct lbs_private structure
1212 *
1213 * returns: 0 for success
1214 */
1215 int lbs_free_cmd_buffer(struct lbs_private *priv)
1216 {
1217 struct cmd_ctrl_node *cmdarray;
1218 unsigned int i;
1219
1220 lbs_deb_enter(LBS_DEB_HOST);
1221
1222 /* need to check if cmd array is allocated or not */
1223 if (priv->cmd_array == NULL) {
1224 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1225 goto done;
1226 }
1227
1228 cmdarray = priv->cmd_array;
1229
1230 /* Release shared memory buffers */
1231 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1232 if (cmdarray[i].cmdbuf) {
1233 kfree(cmdarray[i].cmdbuf);
1234 cmdarray[i].cmdbuf = NULL;
1235 }
1236 }
1237
1238 /* Release cmd_ctrl_node */
1239 if (priv->cmd_array) {
1240 kfree(priv->cmd_array);
1241 priv->cmd_array = NULL;
1242 }
1243
1244 done:
1245 lbs_deb_leave(LBS_DEB_HOST);
1246 return 0;
1247 }
1248
1249 /**
1250 * lbs_get_free_cmd_node - gets a free command node if available in
1251 * command free queue
1252 *
1253 * @priv: A pointer to &struct lbs_private structure
1254 *
1255 * returns: A pointer to &cmd_ctrl_node structure on success
1256 * or %NULL on error
1257 */
1258 static struct cmd_ctrl_node *lbs_get_free_cmd_node(struct lbs_private *priv)
1259 {
1260 struct cmd_ctrl_node *tempnode;
1261 unsigned long flags;
1262
1263 lbs_deb_enter(LBS_DEB_HOST);
1264
1265 if (!priv)
1266 return NULL;
1267
1268 spin_lock_irqsave(&priv->driver_lock, flags);
1269
1270 if (!list_empty(&priv->cmdfreeq)) {
1271 tempnode = list_first_entry(&priv->cmdfreeq,
1272 struct cmd_ctrl_node, list);
1273 list_del_init(&tempnode->list);
1274 } else {
1275 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1276 tempnode = NULL;
1277 }
1278
1279 spin_unlock_irqrestore(&priv->driver_lock, flags);
1280
1281 lbs_deb_leave(LBS_DEB_HOST);
1282 return tempnode;
1283 }
1284
1285 /**
1286 * lbs_execute_next_command - execute next command in command
1287 * pending queue. Will put firmware back to PS mode if applicable.
1288 *
1289 * @priv: A pointer to &struct lbs_private structure
1290 *
1291 * returns: 0 on success or -1 on error
1292 */
1293 int lbs_execute_next_command(struct lbs_private *priv)
1294 {
1295 struct cmd_ctrl_node *cmdnode = NULL;
1296 struct cmd_header *cmd;
1297 unsigned long flags;
1298 int ret = 0;
1299
1300 /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1301 * only caller to us is lbs_thread() and we get even when a
1302 * data packet is received */
1303 lbs_deb_enter(LBS_DEB_THREAD);
1304
1305 spin_lock_irqsave(&priv->driver_lock, flags);
1306
1307 if (priv->cur_cmd) {
1308 netdev_alert(priv->dev,
1309 "EXEC_NEXT_CMD: already processing command!\n");
1310 spin_unlock_irqrestore(&priv->driver_lock, flags);
1311 ret = -1;
1312 goto done;
1313 }
1314
1315 if (!list_empty(&priv->cmdpendingq)) {
1316 cmdnode = list_first_entry(&priv->cmdpendingq,
1317 struct cmd_ctrl_node, list);
1318 }
1319
1320 spin_unlock_irqrestore(&priv->driver_lock, flags);
1321
1322 if (cmdnode) {
1323 cmd = cmdnode->cmdbuf;
1324
1325 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1326 if ((priv->psstate == PS_STATE_SLEEP) ||
1327 (priv->psstate == PS_STATE_PRE_SLEEP)) {
1328 lbs_deb_host(
1329 "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1330 le16_to_cpu(cmd->command),
1331 priv->psstate);
1332 ret = -1;
1333 goto done;
1334 }
1335 lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1336 "0x%04x in psstate %d\n",
1337 le16_to_cpu(cmd->command), priv->psstate);
1338 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1339 /*
1340 * 1. Non-PS command:
1341 * Queue it. set needtowakeup to TRUE if current state
1342 * is SLEEP, otherwise call send EXIT_PS.
1343 * 2. PS command but not EXIT_PS:
1344 * Ignore it.
1345 * 3. PS command EXIT_PS:
1346 * Set needtowakeup to TRUE if current state is SLEEP,
1347 * otherwise send this command down to firmware
1348 * immediately.
1349 */
1350 if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1351 /* Prepare to send Exit PS,
1352 * this non PS command will be sent later */
1353 if ((priv->psstate == PS_STATE_SLEEP)
1354 || (priv->psstate == PS_STATE_PRE_SLEEP)
1355 ) {
1356 /* w/ new scheme, it will not reach here.
1357 since it is blocked in main_thread. */
1358 priv->needtowakeup = 1;
1359 } else {
1360 lbs_set_ps_mode(priv,
1361 PS_MODE_ACTION_EXIT_PS,
1362 false);
1363 }
1364
1365 ret = 0;
1366 goto done;
1367 } else {
1368 /*
1369 * PS command. Ignore it if it is not Exit_PS.
1370 * otherwise send it down immediately.
1371 */
1372 struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];
1373
1374 lbs_deb_host(
1375 "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1376 psm->action);
1377 if (psm->action !=
1378 cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
1379 lbs_deb_host(
1380 "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1381 lbs_complete_command(priv, cmdnode, 0);
1382
1383 ret = 0;
1384 goto done;
1385 }
1386
1387 if ((priv->psstate == PS_STATE_SLEEP) ||
1388 (priv->psstate == PS_STATE_PRE_SLEEP)) {
1389 lbs_deb_host(
1390 "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1391 lbs_complete_command(priv, cmdnode, 0);
1392 priv->needtowakeup = 1;
1393
1394 ret = 0;
1395 goto done;
1396 }
1397
1398 lbs_deb_host(
1399 "EXEC_NEXT_CMD: sending EXIT_PS\n");
1400 }
1401 }
1402 spin_lock_irqsave(&priv->driver_lock, flags);
1403 list_del_init(&cmdnode->list);
1404 spin_unlock_irqrestore(&priv->driver_lock, flags);
1405 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1406 le16_to_cpu(cmd->command));
1407 lbs_submit_command(priv, cmdnode);
1408 } else {
1409 /*
1410 * check if in power save mode, if yes, put the device back
1411 * to PS mode
1412 */
1413 #ifdef TODO
1414 /*
1415 * This was the old code for libertas+wext. Someone that
1416 * understands this beast should re-code it in a sane way.
1417 *
1418 * I actually don't understand why this is related to WPA
1419 * and to connection status, shouldn't powering should be
1420 * independ of such things?
1421 */
1422 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1423 (priv->psstate == PS_STATE_FULL_POWER) &&
1424 ((priv->connect_status == LBS_CONNECTED) ||
1425 lbs_mesh_connected(priv))) {
1426 if (priv->secinfo.WPAenabled ||
1427 priv->secinfo.WPA2enabled) {
1428 /* check for valid WPA group keys */
1429 if (priv->wpa_mcast_key.len ||
1430 priv->wpa_unicast_key.len) {
1431 lbs_deb_host(
1432 "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
1433 " go back to PS_SLEEP");
1434 lbs_set_ps_mode(priv,
1435 PS_MODE_ACTION_ENTER_PS,
1436 false);
1437 }
1438 } else {
1439 lbs_deb_host(
1440 "EXEC_NEXT_CMD: cmdpendingq empty, "
1441 "go back to PS_SLEEP");
1442 lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS,
1443 false);
1444 }
1445 }
1446 #endif
1447 }
1448
1449 ret = 0;
1450 done:
1451 lbs_deb_leave(LBS_DEB_THREAD);
1452 return ret;
1453 }
1454
1455 static void lbs_send_confirmsleep(struct lbs_private *priv)
1456 {
1457 unsigned long flags;
1458 int ret;
1459
1460 lbs_deb_enter(LBS_DEB_HOST);
1461 lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1462 sizeof(confirm_sleep));
1463
1464 ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1465 sizeof(confirm_sleep));
1466 if (ret) {
1467 netdev_alert(priv->dev, "confirm_sleep failed\n");
1468 goto out;
1469 }
1470
1471 spin_lock_irqsave(&priv->driver_lock, flags);
1472
1473 /* We don't get a response on the sleep-confirmation */
1474 priv->dnld_sent = DNLD_RES_RECEIVED;
1475
1476 if (priv->is_host_sleep_configured) {
1477 priv->is_host_sleep_activated = 1;
1478 wake_up_interruptible(&priv->host_sleep_q);
1479 }
1480
1481 /* If nothing to do, go back to sleep (?) */
1482 if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1483 priv->psstate = PS_STATE_SLEEP;
1484
1485 spin_unlock_irqrestore(&priv->driver_lock, flags);
1486
1487 out:
1488 lbs_deb_leave(LBS_DEB_HOST);
1489 }
1490
1491 /**
1492 * lbs_ps_confirm_sleep - checks condition and prepares to
1493 * send sleep confirm command to firmware if ok
1494 *
1495 * @priv: A pointer to &struct lbs_private structure
1496 *
1497 * returns: n/a
1498 */
1499 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1500 {
1501 unsigned long flags =0;
1502 int allowed = 1;
1503
1504 lbs_deb_enter(LBS_DEB_HOST);
1505
1506 spin_lock_irqsave(&priv->driver_lock, flags);
1507 if (priv->dnld_sent) {
1508 allowed = 0;
1509 lbs_deb_host("dnld_sent was set\n");
1510 }
1511
1512 /* In-progress command? */
1513 if (priv->cur_cmd) {
1514 allowed = 0;
1515 lbs_deb_host("cur_cmd was set\n");
1516 }
1517
1518 /* Pending events or command responses? */
1519 if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1520 allowed = 0;
1521 lbs_deb_host("pending events or command responses\n");
1522 }
1523 spin_unlock_irqrestore(&priv->driver_lock, flags);
1524
1525 if (allowed) {
1526 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1527 lbs_send_confirmsleep(priv);
1528 } else {
1529 lbs_deb_host("sleep confirm has been delayed\n");
1530 }
1531
1532 lbs_deb_leave(LBS_DEB_HOST);
1533 }
1534
1535
1536 /**
1537 * lbs_set_tpc_cfg - Configures the transmission power control functionality
1538 *
1539 * @priv: A pointer to &struct lbs_private structure
1540 * @enable: Transmission power control enable
1541 * @p0: Power level when link quality is good (dBm).
1542 * @p1: Power level when link quality is fair (dBm).
1543 * @p2: Power level when link quality is poor (dBm).
1544 * @usesnr: Use Signal to Noise Ratio in TPC
1545 *
1546 * returns: 0 on success
1547 */
1548 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1549 int8_t p2, int usesnr)
1550 {
1551 struct cmd_ds_802_11_tpc_cfg cmd;
1552 int ret;
1553
1554 memset(&cmd, 0, sizeof(cmd));
1555 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1556 cmd.action = cpu_to_le16(CMD_ACT_SET);
1557 cmd.enable = !!enable;
1558 cmd.usesnr = !!usesnr;
1559 cmd.P0 = p0;
1560 cmd.P1 = p1;
1561 cmd.P2 = p2;
1562
1563 ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1564
1565 return ret;
1566 }
1567
1568 /**
1569 * lbs_set_power_adapt_cfg - Configures the power adaptation settings
1570 *
1571 * @priv: A pointer to &struct lbs_private structure
1572 * @enable: Power adaptation enable
1573 * @p0: Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1574 * @p1: Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1575 * @p2: Power level for 48 and 54 Mbps (dBm).
1576 *
1577 * returns: 0 on Success
1578 */
1579
1580 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1581 int8_t p1, int8_t p2)
1582 {
1583 struct cmd_ds_802_11_pa_cfg cmd;
1584 int ret;
1585
1586 memset(&cmd, 0, sizeof(cmd));
1587 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1588 cmd.action = cpu_to_le16(CMD_ACT_SET);
1589 cmd.enable = !!enable;
1590 cmd.P0 = p0;
1591 cmd.P1 = p1;
1592 cmd.P2 = p2;
1593
1594 ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1595
1596 return ret;
1597 }
1598
1599
1600 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1601 uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1602 int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1603 unsigned long callback_arg)
1604 {
1605 struct cmd_ctrl_node *cmdnode;
1606
1607 lbs_deb_enter(LBS_DEB_HOST);
1608
1609 if (priv->surpriseremoved) {
1610 lbs_deb_host("PREP_CMD: card removed\n");
1611 cmdnode = ERR_PTR(-ENOENT);
1612 goto done;
1613 }
1614
1615 /* No commands are allowed in Deep Sleep until we toggle the GPIO
1616 * to wake up the card and it has signaled that it's ready.
1617 */
1618 if (!priv->is_auto_deep_sleep_enabled) {
1619 if (priv->is_deep_sleep) {
1620 lbs_deb_cmd("command not allowed in deep sleep\n");
1621 cmdnode = ERR_PTR(-EBUSY);
1622 goto done;
1623 }
1624 }
1625
1626 cmdnode = lbs_get_free_cmd_node(priv);
1627 if (cmdnode == NULL) {
1628 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1629
1630 /* Wake up main thread to execute next command */
1631 wake_up(&priv->waitq);
1632 cmdnode = ERR_PTR(-ENOBUFS);
1633 goto done;
1634 }
1635
1636 cmdnode->callback = callback;
1637 cmdnode->callback_arg = callback_arg;
1638
1639 /* Copy the incoming command to the buffer */
1640 memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1641
1642 /* Set command, clean result, move to buffer */
1643 cmdnode->cmdbuf->command = cpu_to_le16(command);
1644 cmdnode->cmdbuf->size = cpu_to_le16(in_cmd_size);
1645 cmdnode->cmdbuf->result = 0;
1646
1647 lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1648
1649 cmdnode->cmdwaitqwoken = 0;
1650 lbs_queue_cmd(priv, cmdnode);
1651 wake_up(&priv->waitq);
1652
1653 done:
1654 lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
1655 return cmdnode;
1656 }
1657
1658 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1659 struct cmd_header *in_cmd, int in_cmd_size)
1660 {
1661 lbs_deb_enter(LBS_DEB_CMD);
1662 __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1663 lbs_cmd_async_callback, 0);
1664 lbs_deb_leave(LBS_DEB_CMD);
1665 }
1666
1667 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1668 struct cmd_header *in_cmd, int in_cmd_size,
1669 int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1670 unsigned long callback_arg)
1671 {
1672 struct cmd_ctrl_node *cmdnode;
1673 unsigned long flags;
1674 int ret = 0;
1675
1676 lbs_deb_enter(LBS_DEB_HOST);
1677
1678 cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1679 callback, callback_arg);
1680 if (IS_ERR(cmdnode)) {
1681 ret = PTR_ERR(cmdnode);
1682 goto done;
1683 }
1684
1685 might_sleep();
1686
1687 /*
1688 * Be careful with signals here. A signal may be received as the system
1689 * goes into suspend or resume. We do not want this to interrupt the
1690 * command, so we perform an uninterruptible sleep.
1691 */
1692 wait_event(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1693
1694 spin_lock_irqsave(&priv->driver_lock, flags);
1695 ret = cmdnode->result;
1696 if (ret)
1697 netdev_info(priv->dev, "PREP_CMD: command 0x%04x failed: %d\n",
1698 command, ret);
1699
1700 __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1701 spin_unlock_irqrestore(&priv->driver_lock, flags);
1702
1703 done:
1704 lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1705 return ret;
1706 }
1707 EXPORT_SYMBOL_GPL(__lbs_cmd);