xref: /linux/drivers/net/wireless/realtek/rtlwifi/rtl8192d/trx_common.c (revision a3a02a52bcfcbcc4a637d4b68bf1bc391c9fad02)
1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2009-2012  Realtek Corporation.*/
3 
4 #include "../wifi.h"
5 #include "../base.h"
6 #include "../stats.h"
7 #include "def.h"
8 #include "trx_common.h"
9 
10 static long _rtl92d_translate_todbm(struct ieee80211_hw *hw,
11 				    u8 signal_strength_index)
12 {
13 	long signal_power;
14 
15 	signal_power = (long)((signal_strength_index + 1) >> 1);
16 	signal_power -= 95;
17 	return signal_power;
18 }
19 
20 static void _rtl92d_query_rxphystatus(struct ieee80211_hw *hw,
21 				      struct rtl_stats *pstats,
22 				      __le32 *pdesc,
23 				      struct rx_fwinfo_92d *p_drvinfo,
24 				      bool packet_match_bssid,
25 				      bool packet_toself,
26 				      bool packet_beacon)
27 {
28 	struct rtl_priv *rtlpriv = rtl_priv(hw);
29 	struct rtl_phy *rtlphy = &rtlpriv->phy;
30 	struct rtl_ps_ctl *ppsc = rtl_psc(rtlpriv);
31 	struct phy_sts_cck_8192d *cck_buf;
32 	s8 rx_pwr_all, rx_pwr[4];
33 	u8 rf_rx_num = 0, evm, pwdb_all;
34 	u8 i, max_spatial_stream;
35 	u32 rssi, total_rssi = 0;
36 	bool is_cck_rate;
37 	u8 rxmcs;
38 
39 	rxmcs = get_rx_desc_rxmcs(pdesc);
40 	is_cck_rate = rxmcs <= DESC_RATE11M;
41 	pstats->packet_matchbssid = packet_match_bssid;
42 	pstats->packet_toself = packet_toself;
43 	pstats->packet_beacon = packet_beacon;
44 	pstats->is_cck = is_cck_rate;
45 	pstats->rx_mimo_sig_qual[0] = -1;
46 	pstats->rx_mimo_sig_qual[1] = -1;
47 
48 	if (is_cck_rate) {
49 		u8 report, cck_highpwr;
50 
51 		cck_buf = (struct phy_sts_cck_8192d *)p_drvinfo;
52 		if (ppsc->rfpwr_state == ERFON)
53 			cck_highpwr = rtlphy->cck_high_power;
54 		else
55 			cck_highpwr = false;
56 		if (!cck_highpwr) {
57 			u8 cck_agc_rpt = cck_buf->cck_agc_rpt;
58 
59 			report = cck_buf->cck_agc_rpt & 0xc0;
60 			report = report >> 6;
61 			switch (report) {
62 			case 0x3:
63 				rx_pwr_all = -46 - (cck_agc_rpt & 0x3e);
64 				break;
65 			case 0x2:
66 				rx_pwr_all = -26 - (cck_agc_rpt & 0x3e);
67 				break;
68 			case 0x1:
69 				rx_pwr_all = -12 - (cck_agc_rpt & 0x3e);
70 				break;
71 			case 0x0:
72 				rx_pwr_all = 16 - (cck_agc_rpt & 0x3e);
73 				break;
74 			}
75 		} else {
76 			u8 cck_agc_rpt = cck_buf->cck_agc_rpt;
77 
78 			report = p_drvinfo->cfosho[0] & 0x60;
79 			report = report >> 5;
80 			switch (report) {
81 			case 0x3:
82 				rx_pwr_all = -46 - ((cck_agc_rpt & 0x1f) << 1);
83 				break;
84 			case 0x2:
85 				rx_pwr_all = -26 - ((cck_agc_rpt & 0x1f) << 1);
86 				break;
87 			case 0x1:
88 				rx_pwr_all = -12 - ((cck_agc_rpt & 0x1f) << 1);
89 				break;
90 			case 0x0:
91 				rx_pwr_all = 16 - ((cck_agc_rpt & 0x1f) << 1);
92 				break;
93 			}
94 		}
95 		pwdb_all = rtl_query_rxpwrpercentage(rx_pwr_all);
96 		/* CCK gain is smaller than OFDM/MCS gain,  */
97 		/* so we add gain diff by experiences, the val is 6 */
98 		pwdb_all += 6;
99 		if (pwdb_all > 100)
100 			pwdb_all = 100;
101 		/* modify the offset to make the same gain index with OFDM. */
102 		if (pwdb_all > 34 && pwdb_all <= 42)
103 			pwdb_all -= 2;
104 		else if (pwdb_all > 26 && pwdb_all <= 34)
105 			pwdb_all -= 6;
106 		else if (pwdb_all > 14 && pwdb_all <= 26)
107 			pwdb_all -= 8;
108 		else if (pwdb_all > 4 && pwdb_all <= 14)
109 			pwdb_all -= 4;
110 		pstats->rx_pwdb_all = pwdb_all;
111 		pstats->recvsignalpower = rx_pwr_all;
112 		if (packet_match_bssid) {
113 			u8 sq;
114 
115 			if (pstats->rx_pwdb_all > 40) {
116 				sq = 100;
117 			} else {
118 				sq = cck_buf->sq_rpt;
119 				if (sq > 64)
120 					sq = 0;
121 				else if (sq < 20)
122 					sq = 100;
123 				else
124 					sq = ((64 - sq) * 100) / 44;
125 			}
126 			pstats->signalquality = sq;
127 			pstats->rx_mimo_sig_qual[0] = sq;
128 			pstats->rx_mimo_sig_qual[1] = -1;
129 		}
130 	} else {
131 		rtlpriv->dm.rfpath_rxenable[0] = true;
132 		rtlpriv->dm.rfpath_rxenable[1] = true;
133 		for (i = RF90_PATH_A; i < RF6052_MAX_PATH; i++) {
134 			if (rtlpriv->dm.rfpath_rxenable[i])
135 				rf_rx_num++;
136 			rx_pwr[i] = ((p_drvinfo->gain_trsw[i] & 0x3f) * 2)
137 				    - 110;
138 			rssi = rtl_query_rxpwrpercentage(rx_pwr[i]);
139 			total_rssi += rssi;
140 			rtlpriv->stats.rx_snr_db[i] =
141 					 (long)(p_drvinfo->rxsnr[i] / 2);
142 			if (packet_match_bssid)
143 				pstats->rx_mimo_signalstrength[i] = (u8)rssi;
144 		}
145 		rx_pwr_all = ((p_drvinfo->pwdb_all >> 1) & 0x7f) - 106;
146 		pwdb_all = rtl_query_rxpwrpercentage(rx_pwr_all);
147 		pstats->rx_pwdb_all = pwdb_all;
148 		pstats->rxpower = rx_pwr_all;
149 		pstats->recvsignalpower = rx_pwr_all;
150 		if (get_rx_desc_rxht(pdesc) && rxmcs >= DESC_RATEMCS8 &&
151 		    rxmcs <= DESC_RATEMCS15)
152 			max_spatial_stream = 2;
153 		else
154 			max_spatial_stream = 1;
155 		for (i = 0; i < max_spatial_stream; i++) {
156 			evm = rtl_evm_db_to_percentage(p_drvinfo->rxevm[i]);
157 			if (packet_match_bssid) {
158 				if (i == 0)
159 					pstats->signalquality =
160 						 (u8)(evm & 0xff);
161 				pstats->rx_mimo_sig_qual[i] =
162 						 (u8)(evm & 0xff);
163 			}
164 		}
165 	}
166 	if (is_cck_rate)
167 		pstats->signalstrength = (u8)(rtl_signal_scale_mapping(hw,
168 				pwdb_all));
169 	else if (rf_rx_num != 0)
170 		pstats->signalstrength = (u8)(rtl_signal_scale_mapping(hw,
171 				total_rssi /= rf_rx_num));
172 }
173 
174 static void rtl92d_loop_over_paths(struct ieee80211_hw *hw,
175 				   struct rtl_stats *pstats)
176 {
177 	struct rtl_priv *rtlpriv = rtl_priv(hw);
178 	struct rtl_phy *rtlphy = &rtlpriv->phy;
179 	u8 rfpath;
180 
181 	for (rfpath = RF90_PATH_A; rfpath < rtlphy->num_total_rfpath;
182 	     rfpath++) {
183 		if (rtlpriv->stats.rx_rssi_percentage[rfpath] == 0) {
184 			rtlpriv->stats.rx_rssi_percentage[rfpath] =
185 			    pstats->rx_mimo_signalstrength[rfpath];
186 		}
187 		if (pstats->rx_mimo_signalstrength[rfpath] >
188 		    rtlpriv->stats.rx_rssi_percentage[rfpath]) {
189 			rtlpriv->stats.rx_rssi_percentage[rfpath] =
190 			    ((rtlpriv->stats.rx_rssi_percentage[rfpath] *
191 			      (RX_SMOOTH_FACTOR - 1)) +
192 			     (pstats->rx_mimo_signalstrength[rfpath])) /
193 			    (RX_SMOOTH_FACTOR);
194 			rtlpriv->stats.rx_rssi_percentage[rfpath] =
195 			    rtlpriv->stats.rx_rssi_percentage[rfpath] + 1;
196 		} else {
197 			rtlpriv->stats.rx_rssi_percentage[rfpath] =
198 			    ((rtlpriv->stats.rx_rssi_percentage[rfpath] *
199 			      (RX_SMOOTH_FACTOR - 1)) +
200 			     (pstats->rx_mimo_signalstrength[rfpath])) /
201 			    (RX_SMOOTH_FACTOR);
202 		}
203 	}
204 }
205 
206 static void _rtl92d_process_ui_rssi(struct ieee80211_hw *hw,
207 				    struct rtl_stats *pstats)
208 {
209 	struct rtl_priv *rtlpriv = rtl_priv(hw);
210 	struct rt_smooth_data *ui_rssi;
211 	u32 last_rssi, tmpval;
212 
213 	if (!pstats->packet_toself && !pstats->packet_beacon)
214 		return;
215 
216 	ui_rssi = &rtlpriv->stats.ui_rssi;
217 
218 	rtlpriv->stats.rssi_calculate_cnt++;
219 	if (ui_rssi->total_num++ >= PHY_RSSI_SLID_WIN_MAX) {
220 		ui_rssi->total_num = PHY_RSSI_SLID_WIN_MAX;
221 		last_rssi = ui_rssi->elements[ui_rssi->index];
222 		ui_rssi->total_val -= last_rssi;
223 	}
224 	ui_rssi->total_val += pstats->signalstrength;
225 	ui_rssi->elements[ui_rssi->index++] = pstats->signalstrength;
226 	if (ui_rssi->index >= PHY_RSSI_SLID_WIN_MAX)
227 		ui_rssi->index = 0;
228 	tmpval = ui_rssi->total_val / ui_rssi->total_num;
229 	rtlpriv->stats.signal_strength = _rtl92d_translate_todbm(hw, (u8)tmpval);
230 	pstats->rssi = rtlpriv->stats.signal_strength;
231 
232 	if (!pstats->is_cck && pstats->packet_toself)
233 		rtl92d_loop_over_paths(hw, pstats);
234 }
235 
236 static void _rtl92d_update_rxsignalstatistics(struct ieee80211_hw *hw,
237 					      struct rtl_stats *pstats)
238 {
239 	struct rtl_priv *rtlpriv = rtl_priv(hw);
240 	int weighting = 0;
241 
242 	if (rtlpriv->stats.recv_signal_power == 0)
243 		rtlpriv->stats.recv_signal_power = pstats->recvsignalpower;
244 	if (pstats->recvsignalpower > rtlpriv->stats.recv_signal_power)
245 		weighting = 5;
246 	else if (pstats->recvsignalpower < rtlpriv->stats.recv_signal_power)
247 		weighting = (-5);
248 	rtlpriv->stats.recv_signal_power = (rtlpriv->stats.recv_signal_power *
249 		5 + pstats->recvsignalpower + weighting) / 6;
250 }
251 
252 static void _rtl92d_process_pwdb(struct ieee80211_hw *hw,
253 				 struct rtl_stats *pstats)
254 {
255 	struct rtl_priv *rtlpriv = rtl_priv(hw);
256 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
257 	long undec_sm_pwdb;
258 
259 	if (mac->opmode == NL80211_IFTYPE_ADHOC	||
260 	    mac->opmode == NL80211_IFTYPE_AP)
261 		return;
262 
263 	undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
264 
265 	if (pstats->packet_toself || pstats->packet_beacon) {
266 		if (undec_sm_pwdb < 0)
267 			undec_sm_pwdb = pstats->rx_pwdb_all;
268 		if (pstats->rx_pwdb_all > (u32)undec_sm_pwdb) {
269 			undec_sm_pwdb = (((undec_sm_pwdb) *
270 			      (RX_SMOOTH_FACTOR - 1)) +
271 			      (pstats->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
272 			undec_sm_pwdb = undec_sm_pwdb + 1;
273 		} else {
274 			undec_sm_pwdb = (((undec_sm_pwdb) *
275 			      (RX_SMOOTH_FACTOR - 1)) +
276 			      (pstats->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
277 		}
278 		rtlpriv->dm.undec_sm_pwdb = undec_sm_pwdb;
279 		_rtl92d_update_rxsignalstatistics(hw, pstats);
280 	}
281 }
282 
283 static void rtl92d_loop_over_streams(struct ieee80211_hw *hw,
284 				     struct rtl_stats *pstats)
285 {
286 	struct rtl_priv *rtlpriv = rtl_priv(hw);
287 	int stream;
288 
289 	for (stream = 0; stream < 2; stream++) {
290 		if (pstats->rx_mimo_sig_qual[stream] != -1) {
291 			if (rtlpriv->stats.rx_evm_percentage[stream] == 0) {
292 				rtlpriv->stats.rx_evm_percentage[stream] =
293 				    pstats->rx_mimo_sig_qual[stream];
294 			}
295 			rtlpriv->stats.rx_evm_percentage[stream] =
296 			    ((rtlpriv->stats.rx_evm_percentage[stream]
297 			      * (RX_SMOOTH_FACTOR - 1)) +
298 			     (pstats->rx_mimo_sig_qual[stream] * 1)) /
299 			    (RX_SMOOTH_FACTOR);
300 		}
301 	}
302 }
303 
304 static void _rtl92d_process_ui_link_quality(struct ieee80211_hw *hw,
305 					    struct rtl_stats *pstats)
306 {
307 	struct rtl_priv *rtlpriv = rtl_priv(hw);
308 	struct rt_smooth_data *ui_link_quality;
309 	u32 last_evm, tmpval;
310 
311 	if (pstats->signalquality == 0)
312 		return;
313 	if (!pstats->packet_toself && !pstats->packet_beacon)
314 		return;
315 
316 	ui_link_quality = &rtlpriv->stats.ui_link_quality;
317 
318 	if (ui_link_quality->total_num++ >= PHY_LINKQUALITY_SLID_WIN_MAX) {
319 		ui_link_quality->total_num = PHY_LINKQUALITY_SLID_WIN_MAX;
320 		last_evm = ui_link_quality->elements[ui_link_quality->index];
321 		ui_link_quality->total_val -= last_evm;
322 	}
323 	ui_link_quality->total_val += pstats->signalquality;
324 	ui_link_quality->elements[ui_link_quality->index++] = pstats->signalquality;
325 	if (ui_link_quality->index >= PHY_LINKQUALITY_SLID_WIN_MAX)
326 		ui_link_quality->index = 0;
327 	tmpval = ui_link_quality->total_val / ui_link_quality->total_num;
328 	rtlpriv->stats.signal_quality = tmpval;
329 	rtlpriv->stats.last_sigstrength_inpercent = tmpval;
330 	rtl92d_loop_over_streams(hw, pstats);
331 }
332 
333 static void _rtl92d_process_phyinfo(struct ieee80211_hw *hw,
334 				    u8 *buffer,
335 				    struct rtl_stats *pcurrent_stats)
336 {
337 	if (!pcurrent_stats->packet_matchbssid &&
338 	    !pcurrent_stats->packet_beacon)
339 		return;
340 
341 	_rtl92d_process_ui_rssi(hw, pcurrent_stats);
342 	_rtl92d_process_pwdb(hw, pcurrent_stats);
343 	_rtl92d_process_ui_link_quality(hw, pcurrent_stats);
344 }
345 
346 static void _rtl92d_translate_rx_signal_stuff(struct ieee80211_hw *hw,
347 					      struct sk_buff *skb,
348 					      struct rtl_stats *pstats,
349 					      __le32 *pdesc,
350 					      struct rx_fwinfo_92d *p_drvinfo)
351 {
352 	struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
353 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
354 	struct ieee80211_hdr *hdr;
355 	bool packet_matchbssid;
356 	bool packet_beacon;
357 	bool packet_toself;
358 	u16 type, cfc;
359 	u8 *tmp_buf;
360 	u8 *praddr;
361 	__le16 fc;
362 
363 	tmp_buf = skb->data + pstats->rx_drvinfo_size + pstats->rx_bufshift;
364 	hdr = (struct ieee80211_hdr *)tmp_buf;
365 	fc = hdr->frame_control;
366 	cfc = le16_to_cpu(fc);
367 	type = WLAN_FC_GET_TYPE(fc);
368 	praddr = hdr->addr1;
369 	packet_matchbssid = ((type != IEEE80211_FTYPE_CTL) &&
370 	     ether_addr_equal(mac->bssid,
371 			      (cfc & IEEE80211_FCTL_TODS) ? hdr->addr1 :
372 			      (cfc & IEEE80211_FCTL_FROMDS) ? hdr->addr2 :
373 			      hdr->addr3) &&
374 	     (!pstats->hwerror) && (!pstats->crc) && (!pstats->icv));
375 	packet_toself = packet_matchbssid &&
376 			ether_addr_equal(praddr, rtlefuse->dev_addr);
377 	packet_beacon = ieee80211_is_beacon(fc);
378 	_rtl92d_query_rxphystatus(hw, pstats, pdesc, p_drvinfo,
379 				  packet_matchbssid, packet_toself,
380 				  packet_beacon);
381 	_rtl92d_process_phyinfo(hw, tmp_buf, pstats);
382 }
383 
384 bool rtl92d_rx_query_desc(struct ieee80211_hw *hw, struct rtl_stats *stats,
385 			  struct ieee80211_rx_status *rx_status,
386 			  u8 *pdesc8, struct sk_buff *skb)
387 {
388 	__le32 *pdesc = (__le32 *)pdesc8;
389 	struct rx_fwinfo_92d *p_drvinfo;
390 	u32 phystatus = get_rx_desc_physt(pdesc);
391 
392 	stats->length = (u16)get_rx_desc_pkt_len(pdesc);
393 	stats->rx_drvinfo_size = (u8)get_rx_desc_drv_info_size(pdesc) *
394 				 RX_DRV_INFO_SIZE_UNIT;
395 	stats->rx_bufshift = (u8)(get_rx_desc_shift(pdesc) & 0x03);
396 	stats->icv = (u16)get_rx_desc_icv(pdesc);
397 	stats->crc = (u16)get_rx_desc_crc32(pdesc);
398 	stats->hwerror = (stats->crc | stats->icv);
399 	stats->decrypted = !get_rx_desc_swdec(pdesc) &&
400 			   get_rx_desc_enc_type(pdesc) != RX_DESC_ENC_NONE;
401 	stats->rate = (u8)get_rx_desc_rxmcs(pdesc);
402 	stats->shortpreamble = (u16)get_rx_desc_splcp(pdesc);
403 	stats->isampdu = (bool)(get_rx_desc_paggr(pdesc) == 1);
404 	stats->isfirst_ampdu = (bool)((get_rx_desc_paggr(pdesc) == 1) &&
405 				      (get_rx_desc_faggr(pdesc) == 1));
406 	stats->timestamp_low = get_rx_desc_tsfl(pdesc);
407 	stats->rx_is40mhzpacket = (bool)get_rx_desc_bw(pdesc);
408 	stats->is_ht = (bool)get_rx_desc_rxht(pdesc);
409 	rx_status->freq = hw->conf.chandef.chan->center_freq;
410 	rx_status->band = hw->conf.chandef.chan->band;
411 	if (get_rx_desc_crc32(pdesc))
412 		rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
413 	if (get_rx_desc_bw(pdesc))
414 		rx_status->bw = RATE_INFO_BW_40;
415 	if (get_rx_desc_rxht(pdesc))
416 		rx_status->encoding = RX_ENC_HT;
417 	rx_status->flag |= RX_FLAG_MACTIME_START;
418 	if (stats->decrypted)
419 		rx_status->flag |= RX_FLAG_DECRYPTED;
420 	rx_status->rate_idx = rtlwifi_rate_mapping(hw, stats->is_ht,
421 						   false, stats->rate);
422 	rx_status->mactime = get_rx_desc_tsfl(pdesc);
423 	if (phystatus) {
424 		p_drvinfo = (struct rx_fwinfo_92d *)(skb->data +
425 						     stats->rx_bufshift);
426 		_rtl92d_translate_rx_signal_stuff(hw, skb, stats, pdesc,
427 						  p_drvinfo);
428 	}
429 	/*rx_status->qual = stats->signal; */
430 	rx_status->signal = stats->recvsignalpower + 10;
431 	return true;
432 }
433 EXPORT_SYMBOL_GPL(rtl92d_rx_query_desc);
434 
435 void rtl92d_set_desc(struct ieee80211_hw *hw, u8 *pdesc8, bool istx,
436 		     u8 desc_name, u8 *val)
437 {
438 	__le32 *pdesc = (__le32 *)pdesc8;
439 
440 	if (istx) {
441 		switch (desc_name) {
442 		case HW_DESC_OWN:
443 			wmb();
444 			set_tx_desc_own(pdesc, 1);
445 			break;
446 		case HW_DESC_TX_NEXTDESC_ADDR:
447 			set_tx_desc_next_desc_address(pdesc, *(u32 *)val);
448 			break;
449 		default:
450 			WARN_ONCE(true, "rtl8192de: ERR txdesc :%d not processed\n",
451 				  desc_name);
452 			break;
453 		}
454 	} else {
455 		switch (desc_name) {
456 		case HW_DESC_RXOWN:
457 			wmb();
458 			set_rx_desc_own(pdesc, 1);
459 			break;
460 		case HW_DESC_RXBUFF_ADDR:
461 			set_rx_desc_buff_addr(pdesc, *(u32 *)val);
462 			break;
463 		case HW_DESC_RXPKT_LEN:
464 			set_rx_desc_pkt_len(pdesc, *(u32 *)val);
465 			break;
466 		case HW_DESC_RXERO:
467 			set_rx_desc_eor(pdesc, 1);
468 			break;
469 		default:
470 			WARN_ONCE(true, "rtl8192de: ERR rxdesc :%d not processed\n",
471 				  desc_name);
472 			break;
473 		}
474 	}
475 }
476 EXPORT_SYMBOL_GPL(rtl92d_set_desc);
477 
478 u64 rtl92d_get_desc(struct ieee80211_hw *hw,
479 		    u8 *p_desc8, bool istx, u8 desc_name)
480 {
481 	__le32 *p_desc = (__le32 *)p_desc8;
482 	u32 ret = 0;
483 
484 	if (istx) {
485 		switch (desc_name) {
486 		case HW_DESC_OWN:
487 			ret = get_tx_desc_own(p_desc);
488 			break;
489 		case HW_DESC_TXBUFF_ADDR:
490 			ret = get_tx_desc_tx_buffer_address(p_desc);
491 			break;
492 		default:
493 			WARN_ONCE(true, "rtl8192de: ERR txdesc :%d not processed\n",
494 				  desc_name);
495 			break;
496 		}
497 	} else {
498 		switch (desc_name) {
499 		case HW_DESC_OWN:
500 			ret = get_rx_desc_own(p_desc);
501 			break;
502 		case HW_DESC_RXPKT_LEN:
503 			ret = get_rx_desc_pkt_len(p_desc);
504 		break;
505 		case HW_DESC_RXBUFF_ADDR:
506 			ret = get_rx_desc_buff_addr(p_desc);
507 			break;
508 		default:
509 			WARN_ONCE(true, "rtl8192de: ERR rxdesc :%d not processed\n",
510 				  desc_name);
511 			break;
512 		}
513 	}
514 	return ret;
515 }
516 EXPORT_SYMBOL_GPL(rtl92d_get_desc);
517