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