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/drivers/staging/brcm80211/brcmsmac/wlc_rate.c

https://bitbucket.org/wisechild/galaxy-nexus
C | 499 lines | 364 code | 45 blank | 90 comment | 57 complexity | cdf8df59bc2447c8e42c2cc4d95433ee MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  1/*
  2 * Copyright (c) 2010 Broadcom Corporation
  3 *
  4 * Permission to use, copy, modify, and/or distribute this software for any
  5 * purpose with or without fee is hereby granted, provided that the above
  6 * copyright notice and this permission notice appear in all copies.
  7 *
  8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 */
 16#include <linux/kernel.h>
 17#include <linux/module.h>
 18
 19#include <proto/802.11.h>
 20#include <bcmdefs.h>
 21#include <bcmutils.h>
 22#include <aiutils.h>
 23#include <wlioctl.h>
 24#include <sbhnddma.h>
 25
 26#include "wlc_types.h"
 27#include "d11.h"
 28#include "wl_dbg.h"
 29#include "wlc_cfg.h"
 30#include "wlc_scb.h"
 31#include "wlc_pub.h"
 32#include "wlc_rate.h"
 33
 34/* Rate info per rate: It tells whether a rate is ofdm or not and its phy_rate value */
 35const u8 rate_info[WLC_MAXRATE + 1] = {
 36	/*  0     1     2     3     4     5     6     7     8     9 */
 37/*   0 */ 0x00, 0x00, 0x0a, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00,
 38/*  10 */ 0x00, 0x37, 0x8b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8f, 0x00,
 39/*  20 */ 0x00, 0x00, 0x6e, 0x00, 0x8a, 0x00, 0x00, 0x00, 0x00, 0x00,
 40/*  30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8e, 0x00, 0x00, 0x00,
 41/*  40 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x89, 0x00,
 42/*  50 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 43/*  60 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 44/*  70 */ 0x00, 0x00, 0x8d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 45/*  80 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 46/*  90 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, 0x00, 0x00,
 47/* 100 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8c
 48};
 49
 50/* rates are in units of Kbps */
 51const mcs_info_t mcs_table[MCS_TABLE_SIZE] = {
 52	/* MCS  0: SS 1, MOD: BPSK,  CR 1/2 */
 53	{6500, 13500, CEIL(6500 * 10, 9), CEIL(13500 * 10, 9), 0x00,
 54	 WLC_RATE_6M},
 55	/* MCS  1: SS 1, MOD: QPSK,  CR 1/2 */
 56	{13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x08,
 57	 WLC_RATE_12M},
 58	/* MCS  2: SS 1, MOD: QPSK,  CR 3/4 */
 59	{19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x0A,
 60	 WLC_RATE_18M},
 61	/* MCS  3: SS 1, MOD: 16QAM, CR 1/2 */
 62	{26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x10,
 63	 WLC_RATE_24M},
 64	/* MCS  4: SS 1, MOD: 16QAM, CR 3/4 */
 65	{39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x12,
 66	 WLC_RATE_36M},
 67	/* MCS  5: SS 1, MOD: 64QAM, CR 2/3 */
 68	{52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x19,
 69	 WLC_RATE_48M},
 70	/* MCS  6: SS 1, MOD: 64QAM, CR 3/4 */
 71	{58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x1A,
 72	 WLC_RATE_54M},
 73	/* MCS  7: SS 1, MOD: 64QAM, CR 5/6 */
 74	{65000, 135000, CEIL(65000 * 10, 9), CEIL(135000 * 10, 9), 0x1C,
 75	 WLC_RATE_54M},
 76	/* MCS  8: SS 2, MOD: BPSK,  CR 1/2 */
 77	{13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x40,
 78	 WLC_RATE_6M},
 79	/* MCS  9: SS 2, MOD: QPSK,  CR 1/2 */
 80	{26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x48,
 81	 WLC_RATE_12M},
 82	/* MCS 10: SS 2, MOD: QPSK,  CR 3/4 */
 83	{39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x4A,
 84	 WLC_RATE_18M},
 85	/* MCS 11: SS 2, MOD: 16QAM, CR 1/2 */
 86	{52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x50,
 87	 WLC_RATE_24M},
 88	/* MCS 12: SS 2, MOD: 16QAM, CR 3/4 */
 89	{78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x52,
 90	 WLC_RATE_36M},
 91	/* MCS 13: SS 2, MOD: 64QAM, CR 2/3 */
 92	{104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0x59,
 93	 WLC_RATE_48M},
 94	/* MCS 14: SS 2, MOD: 64QAM, CR 3/4 */
 95	{117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x5A,
 96	 WLC_RATE_54M},
 97	/* MCS 15: SS 2, MOD: 64QAM, CR 5/6 */
 98	{130000, 270000, CEIL(130000 * 10, 9), CEIL(270000 * 10, 9), 0x5C,
 99	 WLC_RATE_54M},
100	/* MCS 16: SS 3, MOD: BPSK,  CR 1/2 */
101	{19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x80,
102	 WLC_RATE_6M},
103	/* MCS 17: SS 3, MOD: QPSK,  CR 1/2 */
104	{39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x88,
105	 WLC_RATE_12M},
106	/* MCS 18: SS 3, MOD: QPSK,  CR 3/4 */
107	{58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x8A,
108	 WLC_RATE_18M},
109	/* MCS 19: SS 3, MOD: 16QAM, CR 1/2 */
110	{78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x90,
111	 WLC_RATE_24M},
112	/* MCS 20: SS 3, MOD: 16QAM, CR 3/4 */
113	{117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x92,
114	 WLC_RATE_36M},
115	/* MCS 21: SS 3, MOD: 64QAM, CR 2/3 */
116	{156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0x99,
117	 WLC_RATE_48M},
118	/* MCS 22: SS 3, MOD: 64QAM, CR 3/4 */
119	{175500, 364500, CEIL(175500 * 10, 9), CEIL(364500 * 10, 9), 0x9A,
120	 WLC_RATE_54M},
121	/* MCS 23: SS 3, MOD: 64QAM, CR 5/6 */
122	{195000, 405000, CEIL(195000 * 10, 9), CEIL(405000 * 10, 9), 0x9B,
123	 WLC_RATE_54M},
124	/* MCS 24: SS 4, MOD: BPSK,  CR 1/2 */
125	{26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0xC0,
126	 WLC_RATE_6M},
127	/* MCS 25: SS 4, MOD: QPSK,  CR 1/2 */
128	{52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0xC8,
129	 WLC_RATE_12M},
130	/* MCS 26: SS 4, MOD: QPSK,  CR 3/4 */
131	{78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0xCA,
132	 WLC_RATE_18M},
133	/* MCS 27: SS 4, MOD: 16QAM, CR 1/2 */
134	{104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0xD0,
135	 WLC_RATE_24M},
136	/* MCS 28: SS 4, MOD: 16QAM, CR 3/4 */
137	{156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0xD2,
138	 WLC_RATE_36M},
139	/* MCS 29: SS 4, MOD: 64QAM, CR 2/3 */
140	{208000, 432000, CEIL(208000 * 10, 9), CEIL(432000 * 10, 9), 0xD9,
141	 WLC_RATE_48M},
142	/* MCS 30: SS 4, MOD: 64QAM, CR 3/4 */
143	{234000, 486000, CEIL(234000 * 10, 9), CEIL(486000 * 10, 9), 0xDA,
144	 WLC_RATE_54M},
145	/* MCS 31: SS 4, MOD: 64QAM, CR 5/6 */
146	{260000, 540000, CEIL(260000 * 10, 9), CEIL(540000 * 10, 9), 0xDB,
147	 WLC_RATE_54M},
148	/* MCS 32: SS 1, MOD: BPSK,  CR 1/2 */
149	{0, 6000, 0, CEIL(6000 * 10, 9), 0x00, WLC_RATE_6M},
150};
151
152/* phycfg for legacy OFDM frames: code rate, modulation scheme, spatial streams
153 *   Number of spatial streams: always 1
154 *   other fields: refer to table 78 of section 17.3.2.2 of the original .11a standard
155 */
156typedef struct legacy_phycfg {
157	u32 rate_ofdm;	/* ofdm mac rate */
158	u8 tx_phy_ctl3;	/* phy ctl byte 3, code rate, modulation type, # of streams */
159} legacy_phycfg_t;
160
161#define LEGACY_PHYCFG_TABLE_SIZE	12	/* Number of legacy_rate_cfg entries in the table */
162
163/* In CCK mode LPPHY overloads OFDM Modulation bits with CCK Data Rate */
164/* Eventually MIMOPHY would also be converted to this format */
165/* 0 = 1Mbps; 1 = 2Mbps; 2 = 5.5Mbps; 3 = 11Mbps */
166static const legacy_phycfg_t legacy_phycfg_table[LEGACY_PHYCFG_TABLE_SIZE] = {
167	{WLC_RATE_1M, 0x00},	/* CCK  1Mbps,  data rate  0 */
168	{WLC_RATE_2M, 0x08},	/* CCK  2Mbps,  data rate  1 */
169	{WLC_RATE_5M5, 0x10},	/* CCK  5.5Mbps,  data rate  2 */
170	{WLC_RATE_11M, 0x18},	/* CCK  11Mbps,  data rate   3 */
171	{WLC_RATE_6M, 0x00},	/* OFDM  6Mbps,  code rate 1/2, BPSK,   1 spatial stream */
172	{WLC_RATE_9M, 0x02},	/* OFDM  9Mbps,  code rate 3/4, BPSK,   1 spatial stream */
173	{WLC_RATE_12M, 0x08},	/* OFDM  12Mbps, code rate 1/2, QPSK,   1 spatial stream */
174	{WLC_RATE_18M, 0x0A},	/* OFDM  18Mbps, code rate 3/4, QPSK,   1 spatial stream */
175	{WLC_RATE_24M, 0x10},	/* OFDM  24Mbps, code rate 1/2, 16-QAM, 1 spatial stream */
176	{WLC_RATE_36M, 0x12},	/* OFDM  36Mbps, code rate 3/4, 16-QAM, 1 spatial stream */
177	{WLC_RATE_48M, 0x19},	/* OFDM  48Mbps, code rate 2/3, 64-QAM, 1 spatial stream */
178	{WLC_RATE_54M, 0x1A},	/* OFDM  54Mbps, code rate 3/4, 64-QAM, 1 spatial stream */
179};
180
181/* Hardware rates (also encodes default basic rates) */
182
183const wlc_rateset_t cck_ofdm_mimo_rates = {
184	12,
185	{			/*    1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,   54 Mbps */
186	 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
187	 0x6c},
188	0x00,
189	{0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
190	 0x00, 0x00, 0x00, 0x00}
191};
192
193const wlc_rateset_t ofdm_mimo_rates = {
194	8,
195	{			/*    6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
196	 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
197	0x00,
198	{0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
199	 0x00, 0x00, 0x00, 0x00}
200};
201
202/* Default ratesets that include MCS32 for 40BW channels */
203const wlc_rateset_t cck_ofdm_40bw_mimo_rates = {
204	12,
205	{			/*    1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,   54 Mbps */
206	 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
207	 0x6c},
208	0x00,
209	{0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
210	 0x00, 0x00, 0x00, 0x00}
211};
212
213const wlc_rateset_t ofdm_40bw_mimo_rates = {
214	8,
215	{			/*    6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
216	 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
217	0x00,
218	{0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
219	 0x00, 0x00, 0x00, 0x00}
220};
221
222const wlc_rateset_t cck_ofdm_rates = {
223	12,
224	{			/*    1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,   54 Mbps */
225	 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
226	 0x6c},
227	0x00,
228	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
229	 0x00, 0x00, 0x00, 0x00}
230};
231
232const wlc_rateset_t gphy_legacy_rates = {
233	4,
234	{			/*    1b,   2b,   5.5b,  11b Mbps */
235	 0x82, 0x84, 0x8b, 0x96},
236	0x00,
237	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
238	 0x00, 0x00, 0x00, 0x00}
239};
240
241const wlc_rateset_t ofdm_rates = {
242	8,
243	{			/*    6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
244	 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
245	0x00,
246	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
247	 0x00, 0x00, 0x00, 0x00}
248};
249
250const wlc_rateset_t cck_rates = {
251	4,
252	{			/*    1b,   2b,   5.5,  11 Mbps */
253	 0x82, 0x84, 0x0b, 0x16},
254	0x00,
255	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
256	 0x00, 0x00, 0x00, 0x00}
257};
258
259static bool wlc_rateset_valid(wlc_rateset_t *rs, bool check_brate);
260
261/* check if rateset is valid.
262 * if check_brate is true, rateset without a basic rate is considered NOT valid.
263 */
264static bool wlc_rateset_valid(wlc_rateset_t *rs, bool check_brate)
265{
266	uint idx;
267
268	if (!rs->count)
269		return false;
270
271	if (!check_brate)
272		return true;
273
274	/* error if no basic rates */
275	for (idx = 0; idx < rs->count; idx++) {
276		if (rs->rates[idx] & WLC_RATE_FLAG)
277			return true;
278	}
279	return false;
280}
281
282void wlc_rateset_mcs_upd(wlc_rateset_t *rs, u8 txstreams)
283{
284	int i;
285	for (i = txstreams; i < MAX_STREAMS_SUPPORTED; i++)
286		rs->mcs[i] = 0;
287}
288
289/* filter based on hardware rateset, and sort filtered rateset with basic bit(s) preserved,
290 * and check if resulting rateset is valid.
291*/
292bool
293wlc_rate_hwrs_filter_sort_validate(wlc_rateset_t *rs,
294				   const wlc_rateset_t *hw_rs,
295				   bool check_brate, u8 txstreams)
296{
297	u8 rateset[WLC_MAXRATE + 1];
298	u8 r;
299	uint count;
300	uint i;
301
302	memset(rateset, 0, sizeof(rateset));
303	count = rs->count;
304
305	for (i = 0; i < count; i++) {
306		/* mask off "basic rate" bit, WLC_RATE_FLAG */
307		r = (int)rs->rates[i] & WLC_RATE_MASK;
308		if ((r > WLC_MAXRATE) || (rate_info[r] == 0)) {
309			continue;
310		}
311		rateset[r] = rs->rates[i];	/* preserve basic bit! */
312	}
313
314	/* fill out the rates in order, looking at only supported rates */
315	count = 0;
316	for (i = 0; i < hw_rs->count; i++) {
317		r = hw_rs->rates[i] & WLC_RATE_MASK;
318		if (rateset[r])
319			rs->rates[count++] = rateset[r];
320	}
321
322	rs->count = count;
323
324	/* only set the mcs rate bit if the equivalent hw mcs bit is set */
325	for (i = 0; i < MCSSET_LEN; i++)
326		rs->mcs[i] = (rs->mcs[i] & hw_rs->mcs[i]);
327
328	if (wlc_rateset_valid(rs, check_brate))
329		return true;
330	else
331		return false;
332}
333
334/* calculate the rate of a rx'd frame and return it as a ratespec */
335ratespec_t wlc_compute_rspec(d11rxhdr_t *rxh, u8 *plcp)
336{
337	int phy_type;
338	ratespec_t rspec = PHY_TXC1_BW_20MHZ << RSPEC_BW_SHIFT;
339
340	phy_type =
341	    ((rxh->RxChan & RXS_CHAN_PHYTYPE_MASK) >> RXS_CHAN_PHYTYPE_SHIFT);
342
343	if ((phy_type == PHY_TYPE_N) || (phy_type == PHY_TYPE_SSN) ||
344	    (phy_type == PHY_TYPE_LCN) || (phy_type == PHY_TYPE_HT)) {
345		switch (rxh->PhyRxStatus_0 & PRXS0_FT_MASK) {
346		case PRXS0_CCK:
347			rspec =
348			    CCK_PHY2MAC_RATE(((cck_phy_hdr_t *) plcp)->signal);
349			break;
350		case PRXS0_OFDM:
351			rspec =
352			    OFDM_PHY2MAC_RATE(((ofdm_phy_hdr_t *) plcp)->
353					      rlpt[0]);
354			break;
355		case PRXS0_PREN:
356			rspec = (plcp[0] & MIMO_PLCP_MCS_MASK) | RSPEC_MIMORATE;
357			if (plcp[0] & MIMO_PLCP_40MHZ) {
358				/* indicate rspec is for 40 MHz mode */
359				rspec &= ~RSPEC_BW_MASK;
360				rspec |= (PHY_TXC1_BW_40MHZ << RSPEC_BW_SHIFT);
361			}
362			break;
363		case PRXS0_STDN:
364			/* fallthru */
365		default:
366			/* not supported, error condition */
367			break;
368		}
369		if (PLCP3_ISSGI(plcp[3]))
370			rspec |= RSPEC_SHORT_GI;
371	} else
372	    if ((phy_type == PHY_TYPE_A) || (rxh->PhyRxStatus_0 & PRXS0_OFDM))
373		rspec = OFDM_PHY2MAC_RATE(((ofdm_phy_hdr_t *) plcp)->rlpt[0]);
374	else
375		rspec = CCK_PHY2MAC_RATE(((cck_phy_hdr_t *) plcp)->signal);
376
377	return rspec;
378}
379
380/* copy rateset src to dst as-is (no masking or sorting) */
381void wlc_rateset_copy(const wlc_rateset_t *src, wlc_rateset_t *dst)
382{
383	memcpy(dst, src, sizeof(wlc_rateset_t));
384}
385
386/*
387 * Copy and selectively filter one rateset to another.
388 * 'basic_only' means only copy basic rates.
389 * 'rates' indicates cck (11b) and ofdm rates combinations.
390 *    - 0: cck and ofdm
391 *    - 1: cck only
392 *    - 2: ofdm only
393 * 'xmask' is the copy mask (typically 0x7f or 0xff).
394 */
395void
396wlc_rateset_filter(wlc_rateset_t *src, wlc_rateset_t *dst, bool basic_only,
397		   u8 rates, uint xmask, bool mcsallow)
398{
399	uint i;
400	uint r;
401	uint count;
402
403	count = 0;
404	for (i = 0; i < src->count; i++) {
405		r = src->rates[i];
406		if (basic_only && !(r & WLC_RATE_FLAG))
407			continue;
408		if ((rates == WLC_RATES_CCK) && IS_OFDM((r & WLC_RATE_MASK)))
409			continue;
410		if ((rates == WLC_RATES_OFDM) && IS_CCK((r & WLC_RATE_MASK)))
411			continue;
412		dst->rates[count++] = r & xmask;
413	}
414	dst->count = count;
415	dst->htphy_membership = src->htphy_membership;
416
417	if (mcsallow && rates != WLC_RATES_CCK)
418		memcpy(&dst->mcs[0], &src->mcs[0], MCSSET_LEN);
419	else
420		wlc_rateset_mcs_clear(dst);
421}
422
423/* select rateset for a given phy_type and bandtype and filter it, sort it
424 * and fill rs_tgt with result
425 */
426void
427wlc_rateset_default(wlc_rateset_t *rs_tgt, const wlc_rateset_t *rs_hw,
428		    uint phy_type, int bandtype, bool cck_only, uint rate_mask,
429		    bool mcsallow, u8 bw, u8 txstreams)
430{
431	const wlc_rateset_t *rs_dflt;
432	wlc_rateset_t rs_sel;
433	if ((PHYTYPE_IS(phy_type, PHY_TYPE_HT)) ||
434	    (PHYTYPE_IS(phy_type, PHY_TYPE_N)) ||
435	    (PHYTYPE_IS(phy_type, PHY_TYPE_LCN)) ||
436	    (PHYTYPE_IS(phy_type, PHY_TYPE_SSN))) {
437		if (BAND_5G(bandtype)) {
438			rs_dflt = (bw == WLC_20_MHZ ?
439				   &ofdm_mimo_rates : &ofdm_40bw_mimo_rates);
440		} else {
441			rs_dflt = (bw == WLC_20_MHZ ?
442				   &cck_ofdm_mimo_rates :
443				   &cck_ofdm_40bw_mimo_rates);
444		}
445	} else if (PHYTYPE_IS(phy_type, PHY_TYPE_LP)) {
446		rs_dflt = (BAND_5G(bandtype)) ? &ofdm_rates : &cck_ofdm_rates;
447	} else if (PHYTYPE_IS(phy_type, PHY_TYPE_A)) {
448		rs_dflt = &ofdm_rates;
449	} else if (PHYTYPE_IS(phy_type, PHY_TYPE_G)) {
450		rs_dflt = &cck_ofdm_rates;
451	} else {
452		/* should not happen, error condition */
453		rs_dflt = &cck_rates;	/* force cck */
454	}
455
456	/* if hw rateset is not supplied, assign selected rateset to it */
457	if (!rs_hw)
458		rs_hw = rs_dflt;
459
460	wlc_rateset_copy(rs_dflt, &rs_sel);
461	wlc_rateset_mcs_upd(&rs_sel, txstreams);
462	wlc_rateset_filter(&rs_sel, rs_tgt, false,
463			   cck_only ? WLC_RATES_CCK : WLC_RATES_CCK_OFDM,
464			   rate_mask, mcsallow);
465	wlc_rate_hwrs_filter_sort_validate(rs_tgt, rs_hw, false,
466					   mcsallow ? txstreams : 1);
467}
468
469s16 wlc_rate_legacy_phyctl(uint rate)
470{
471	uint i;
472	for (i = 0; i < LEGACY_PHYCFG_TABLE_SIZE; i++)
473		if (rate == legacy_phycfg_table[i].rate_ofdm)
474			return legacy_phycfg_table[i].tx_phy_ctl3;
475
476	return -1;
477}
478
479void wlc_rateset_mcs_clear(wlc_rateset_t *rateset)
480{
481	uint i;
482	for (i = 0; i < MCSSET_LEN; i++)
483		rateset->mcs[i] = 0;
484}
485
486void wlc_rateset_mcs_build(wlc_rateset_t *rateset, u8 txstreams)
487{
488	memcpy(&rateset->mcs[0], &cck_ofdm_mimo_rates.mcs[0], MCSSET_LEN);
489	wlc_rateset_mcs_upd(rateset, txstreams);
490}
491
492/* Based on bandwidth passed, allow/disallow MCS 32 in the rateset */
493void wlc_rateset_bw_mcs_filter(wlc_rateset_t *rateset, u8 bw)
494{
495	if (bw == WLC_40_MHZ)
496		setbit(rateset->mcs, 32);
497	else
498		clrbit(rateset->mcs, 32);
499}