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 
17 #include <brcmu_wifi.h>
18 #include <brcmu_utils.h>
19 
20 #include "d11.h"
21 #include "pub.h"
22 #include "rate.h"
23 
24 /*
25  * Rate info per rate: It tells whether a rate is ofdm or not and its phy_rate
26  * value
27  */
28 const u8 rate_info[BRCM_MAXRATE + 1] = {
29 	/*  0     1     2     3     4     5     6     7     8     9 */
30 /*   0 */ 0x00, 0x00, 0x0a, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00,
31 /*  10 */ 0x00, 0x37, 0x8b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8f, 0x00,
32 /*  20 */ 0x00, 0x00, 0x6e, 0x00, 0x8a, 0x00, 0x00, 0x00, 0x00, 0x00,
33 /*  30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8e, 0x00, 0x00, 0x00,
34 /*  40 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x89, 0x00,
35 /*  50 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
36 /*  60 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
37 /*  70 */ 0x00, 0x00, 0x8d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
38 /*  80 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
39 /*  90 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, 0x00, 0x00,
40 /* 100 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8c
41 };
42 
43 /* rates are in units of Kbps */
44 const struct brcms_mcs_info mcs_table[MCS_TABLE_SIZE] = {
45 	/* MCS  0: SS 1, MOD: BPSK,  CR 1/2 */
46 	{6500, 13500, CEIL(6500 * 10, 9), CEIL(13500 * 10, 9), 0x00,
47 	 BRCM_RATE_6M},
48 	/* MCS  1: SS 1, MOD: QPSK,  CR 1/2 */
49 	{13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x08,
50 	 BRCM_RATE_12M},
51 	/* MCS  2: SS 1, MOD: QPSK,  CR 3/4 */
52 	{19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x0A,
53 	 BRCM_RATE_18M},
54 	/* MCS  3: SS 1, MOD: 16QAM, CR 1/2 */
55 	{26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x10,
56 	 BRCM_RATE_24M},
57 	/* MCS  4: SS 1, MOD: 16QAM, CR 3/4 */
58 	{39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x12,
59 	 BRCM_RATE_36M},
60 	/* MCS  5: SS 1, MOD: 64QAM, CR 2/3 */
61 	{52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x19,
62 	 BRCM_RATE_48M},
63 	/* MCS  6: SS 1, MOD: 64QAM, CR 3/4 */
64 	{58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x1A,
65 	 BRCM_RATE_54M},
66 	/* MCS  7: SS 1, MOD: 64QAM, CR 5/6 */
67 	{65000, 135000, CEIL(65000 * 10, 9), CEIL(135000 * 10, 9), 0x1C,
68 	 BRCM_RATE_54M},
69 	/* MCS  8: SS 2, MOD: BPSK,  CR 1/2 */
70 	{13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x40,
71 	 BRCM_RATE_6M},
72 	/* MCS  9: SS 2, MOD: QPSK,  CR 1/2 */
73 	{26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x48,
74 	 BRCM_RATE_12M},
75 	/* MCS 10: SS 2, MOD: QPSK,  CR 3/4 */
76 	{39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x4A,
77 	 BRCM_RATE_18M},
78 	/* MCS 11: SS 2, MOD: 16QAM, CR 1/2 */
79 	{52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x50,
80 	 BRCM_RATE_24M},
81 	/* MCS 12: SS 2, MOD: 16QAM, CR 3/4 */
82 	{78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x52,
83 	 BRCM_RATE_36M},
84 	/* MCS 13: SS 2, MOD: 64QAM, CR 2/3 */
85 	{104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0x59,
86 	 BRCM_RATE_48M},
87 	/* MCS 14: SS 2, MOD: 64QAM, CR 3/4 */
88 	{117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x5A,
89 	 BRCM_RATE_54M},
90 	/* MCS 15: SS 2, MOD: 64QAM, CR 5/6 */
91 	{130000, 270000, CEIL(130000 * 10, 9), CEIL(270000 * 10, 9), 0x5C,
92 	 BRCM_RATE_54M},
93 	/* MCS 16: SS 3, MOD: BPSK,  CR 1/2 */
94 	{19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x80,
95 	 BRCM_RATE_6M},
96 	/* MCS 17: SS 3, MOD: QPSK,  CR 1/2 */
97 	{39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x88,
98 	 BRCM_RATE_12M},
99 	/* MCS 18: SS 3, MOD: QPSK,  CR 3/4 */
100 	{58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x8A,
101 	 BRCM_RATE_18M},
102 	/* MCS 19: SS 3, MOD: 16QAM, CR 1/2 */
103 	{78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x90,
104 	 BRCM_RATE_24M},
105 	/* MCS 20: SS 3, MOD: 16QAM, CR 3/4 */
106 	{117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x92,
107 	 BRCM_RATE_36M},
108 	/* MCS 21: SS 3, MOD: 64QAM, CR 2/3 */
109 	{156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0x99,
110 	 BRCM_RATE_48M},
111 	/* MCS 22: SS 3, MOD: 64QAM, CR 3/4 */
112 	{175500, 364500, CEIL(175500 * 10, 9), CEIL(364500 * 10, 9), 0x9A,
113 	 BRCM_RATE_54M},
114 	/* MCS 23: SS 3, MOD: 64QAM, CR 5/6 */
115 	{195000, 405000, CEIL(195000 * 10, 9), CEIL(405000 * 10, 9), 0x9B,
116 	 BRCM_RATE_54M},
117 	/* MCS 24: SS 4, MOD: BPSK,  CR 1/2 */
118 	{26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0xC0,
119 	 BRCM_RATE_6M},
120 	/* MCS 25: SS 4, MOD: QPSK,  CR 1/2 */
121 	{52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0xC8,
122 	 BRCM_RATE_12M},
123 	/* MCS 26: SS 4, MOD: QPSK,  CR 3/4 */
124 	{78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0xCA,
125 	 BRCM_RATE_18M},
126 	/* MCS 27: SS 4, MOD: 16QAM, CR 1/2 */
127 	{104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0xD0,
128 	 BRCM_RATE_24M},
129 	/* MCS 28: SS 4, MOD: 16QAM, CR 3/4 */
130 	{156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0xD2,
131 	 BRCM_RATE_36M},
132 	/* MCS 29: SS 4, MOD: 64QAM, CR 2/3 */
133 	{208000, 432000, CEIL(208000 * 10, 9), CEIL(432000 * 10, 9), 0xD9,
134 	 BRCM_RATE_48M},
135 	/* MCS 30: SS 4, MOD: 64QAM, CR 3/4 */
136 	{234000, 486000, CEIL(234000 * 10, 9), CEIL(486000 * 10, 9), 0xDA,
137 	 BRCM_RATE_54M},
138 	/* MCS 31: SS 4, MOD: 64QAM, CR 5/6 */
139 	{260000, 540000, CEIL(260000 * 10, 9), CEIL(540000 * 10, 9), 0xDB,
140 	 BRCM_RATE_54M},
141 	/* MCS 32: SS 1, MOD: BPSK,  CR 1/2 */
142 	{0, 6000, 0, CEIL(6000 * 10, 9), 0x00, BRCM_RATE_6M},
143 };
144 
145 /*
146  * phycfg for legacy OFDM frames: code rate, modulation scheme, spatial streams
147  * Number of spatial streams: always 1 other fields: refer to table 78 of
148  * section 17.3.2.2 of the original .11a standard
149  */
150 struct legacy_phycfg {
151 	u32 rate_ofdm;	/* ofdm mac rate */
152 	/* phy ctl byte 3, code rate, modulation type, # of streams */
153 	u8 tx_phy_ctl3;
154 };
155 
156 /* Number of legacy_rate_cfg entries in the table */
157 #define LEGACY_PHYCFG_TABLE_SIZE	12
158 
159 /*
160  * In CCK mode LPPHY overloads OFDM Modulation bits with CCK Data Rate
161  * Eventually MIMOPHY would also be converted to this format
162  * 0 = 1Mbps; 1 = 2Mbps; 2 = 5.5Mbps; 3 = 11Mbps
163  */
164 static const struct
165 legacy_phycfg legacy_phycfg_table[LEGACY_PHYCFG_TABLE_SIZE] = {
166 	{BRCM_RATE_1M, 0x00},	/* CCK  1Mbps,  data rate  0 */
167 	{BRCM_RATE_2M, 0x08},	/* CCK  2Mbps,  data rate  1 */
168 	{BRCM_RATE_5M5, 0x10},	/* CCK  5.5Mbps,  data rate  2 */
169 	{BRCM_RATE_11M, 0x18},	/* CCK  11Mbps,  data rate   3 */
170 	/* OFDM  6Mbps,  code rate 1/2, BPSK,   1 spatial stream */
171 	{BRCM_RATE_6M, 0x00},
172 	/* OFDM  9Mbps,  code rate 3/4, BPSK,   1 spatial stream */
173 	{BRCM_RATE_9M, 0x02},
174 	/* OFDM  12Mbps, code rate 1/2, QPSK,   1 spatial stream */
175 	{BRCM_RATE_12M, 0x08},
176 	/* OFDM  18Mbps, code rate 3/4, QPSK,   1 spatial stream */
177 	{BRCM_RATE_18M, 0x0A},
178 	/* OFDM  24Mbps, code rate 1/2, 16-QAM, 1 spatial stream */
179 	{BRCM_RATE_24M, 0x10},
180 	/* OFDM  36Mbps, code rate 3/4, 16-QAM, 1 spatial stream */
181 	{BRCM_RATE_36M, 0x12},
182 	/* OFDM  48Mbps, code rate 2/3, 64-QAM, 1 spatial stream */
183 	{BRCM_RATE_48M, 0x19},
184 	/* OFDM  54Mbps, code rate 3/4, 64-QAM, 1 spatial stream */
185 	{BRCM_RATE_54M, 0x1A},
186 };
187 
188 /* Hardware rates (also encodes default basic rates) */
189 
190 const struct brcms_c_rateset cck_ofdm_mimo_rates = {
191 	12,
192 	/*  1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48, */
193 	{ 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
194 	/* 54 Mbps */
195 	  0x6c},
196 	0x00,
197 	{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
198 	  0x00, 0x00, 0x00, 0x00, 0x00}
199 };
200 
201 const struct brcms_c_rateset ofdm_mimo_rates = {
202 	8,
203 	/*  6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
204 	{ 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
205 	0x00,
206 	{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
207 	  0x00, 0x00, 0x00, 0x00, 0x00}
208 };
209 
210 /* Default ratesets that include MCS32 for 40BW channels */
211 static const struct brcms_c_rateset cck_ofdm_40bw_mimo_rates = {
212 	12,
213 	/*  1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48 */
214 	{ 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
215 	/* 54 Mbps */
216 	  0x6c},
217 	0x00,
218 	{ 0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
219 	  0x00, 0x00, 0x00, 0x00, 0x00}
220 };
221 
222 static const struct brcms_c_rateset ofdm_40bw_mimo_rates = {
223 	8,
224 	/*  6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
225 	{ 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
226 	0x00,
227 	{ 0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
228 	  0x00, 0x00, 0x00, 0x00, 0x00}
229 };
230 
231 const struct brcms_c_rateset cck_ofdm_rates = {
232 	12,
233 	/*  1b,   2b, 5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,*/
234 	{ 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
235 	/*54 Mbps */
236 	  0x6c},
237 	0x00,
238 	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
239 	  0x00, 0x00, 0x00, 0x00, 0x00}
240 };
241 
242 const struct brcms_c_rateset gphy_legacy_rates = {
243 	4,
244 	/*  1b,   2b,   5.5b, 11b Mbps */
245 	{ 0x82, 0x84, 0x8b, 0x96},
246 	0x00,
247 	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
248 	  0x00, 0x00, 0x00, 0x00, 0x00}
249 };
250 
251 const struct brcms_c_rateset ofdm_rates = {
252 	8,
253 	/*  6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
254 	{ 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
255 	0x00,
256 	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
257 	  0x00, 0x00, 0x00, 0x00, 0x00}
258 };
259 
260 const struct brcms_c_rateset cck_rates = {
261 	4,
262 	/*  1b,   2b,   5.5,  11 Mbps */
263 	{ 0x82, 0x84, 0x0b, 0x16},
264 	0x00,
265 	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
266 	  0x00, 0x00, 0x00, 0x00, 0x00}
267 };
268 
269 /* check if rateset is valid.
270  * if check_brate is true, rateset without a basic rate is considered NOT valid.
271  */
brcms_c_rateset_valid(struct brcms_c_rateset * rs,bool check_brate)272 static bool brcms_c_rateset_valid(struct brcms_c_rateset *rs, bool check_brate)
273 {
274 	uint idx;
275 
276 	if (!rs->count)
277 		return false;
278 
279 	if (!check_brate)
280 		return true;
281 
282 	/* error if no basic rates */
283 	for (idx = 0; idx < rs->count; idx++) {
284 		if (rs->rates[idx] & BRCMS_RATE_FLAG)
285 			return true;
286 	}
287 	return false;
288 }
289 
brcms_c_rateset_mcs_upd(struct brcms_c_rateset * rs,u8 txstreams)290 void brcms_c_rateset_mcs_upd(struct brcms_c_rateset *rs, u8 txstreams)
291 {
292 	int i;
293 	for (i = txstreams; i < MAX_STREAMS_SUPPORTED; i++)
294 		rs->mcs[i] = 0;
295 }
296 
297 /*
298  * filter based on hardware rateset, and sort filtered rateset with basic
299  * bit(s) preserved, and check if resulting rateset is valid.
300 */
301 bool
brcms_c_rate_hwrs_filter_sort_validate(struct brcms_c_rateset * rs,const struct brcms_c_rateset * hw_rs,bool check_brate,u8 txstreams)302 brcms_c_rate_hwrs_filter_sort_validate(struct brcms_c_rateset *rs,
303 				   const struct brcms_c_rateset *hw_rs,
304 				   bool check_brate, u8 txstreams)
305 {
306 	u8 rateset[BRCM_MAXRATE + 1];
307 	u8 r;
308 	uint count;
309 	uint i;
310 
311 	memset(rateset, 0, sizeof(rateset));
312 	count = rs->count;
313 
314 	for (i = 0; i < count; i++) {
315 		/* mask off "basic rate" bit, BRCMS_RATE_FLAG */
316 		r = (int)rs->rates[i] & BRCMS_RATE_MASK;
317 		if ((r > BRCM_MAXRATE) || (rate_info[r] == 0))
318 			continue;
319 		rateset[r] = rs->rates[i];	/* preserve basic bit! */
320 	}
321 
322 	/* fill out the rates in order, looking at only supported rates */
323 	count = 0;
324 	for (i = 0; i < hw_rs->count; i++) {
325 		r = hw_rs->rates[i] & BRCMS_RATE_MASK;
326 		if (rateset[r])
327 			rs->rates[count++] = rateset[r];
328 	}
329 
330 	rs->count = count;
331 
332 	/* only set the mcs rate bit if the equivalent hw mcs bit is set */
333 	for (i = 0; i < MCSSET_LEN; i++)
334 		rs->mcs[i] = (rs->mcs[i] & hw_rs->mcs[i]);
335 
336 	if (brcms_c_rateset_valid(rs, check_brate))
337 		return true;
338 	else
339 		return false;
340 }
341 
342 /* calculate the rate of a rx'd frame and return it as a ratespec */
brcms_c_compute_rspec(struct d11rxhdr * rxh,u8 * plcp)343 u32 brcms_c_compute_rspec(struct d11rxhdr *rxh, u8 *plcp)
344 {
345 	int phy_type;
346 	u32 rspec = PHY_TXC1_BW_20MHZ << RSPEC_BW_SHIFT;
347 
348 	phy_type =
349 	    ((rxh->RxChan & RXS_CHAN_PHYTYPE_MASK) >> RXS_CHAN_PHYTYPE_SHIFT);
350 
351 	if ((phy_type == PHY_TYPE_N) || (phy_type == PHY_TYPE_SSN) ||
352 	    (phy_type == PHY_TYPE_LCN) || (phy_type == PHY_TYPE_HT)) {
353 		switch (rxh->PhyRxStatus_0 & PRXS0_FT_MASK) {
354 		case PRXS0_CCK:
355 			rspec =
356 				cck_phy2mac_rate(
357 				((struct cck_phy_hdr *) plcp)->signal);
358 			break;
359 		case PRXS0_OFDM:
360 			rspec =
361 			    ofdm_phy2mac_rate(
362 				((struct ofdm_phy_hdr *) plcp)->rlpt[0]);
363 			break;
364 		case PRXS0_PREN:
365 			rspec = (plcp[0] & MIMO_PLCP_MCS_MASK) | RSPEC_MIMORATE;
366 			if (plcp[0] & MIMO_PLCP_40MHZ) {
367 				/* indicate rspec is for 40 MHz mode */
368 				rspec &= ~RSPEC_BW_MASK;
369 				rspec |= (PHY_TXC1_BW_40MHZ << RSPEC_BW_SHIFT);
370 			}
371 			break;
372 		case PRXS0_STDN:
373 			/* fallthru */
374 		default:
375 			/* not supported, error condition */
376 			break;
377 		}
378 		if (plcp3_issgi(plcp[3]))
379 			rspec |= RSPEC_SHORT_GI;
380 	} else
381 	    if ((phy_type == PHY_TYPE_A) || (rxh->PhyRxStatus_0 & PRXS0_OFDM))
382 		rspec = ofdm_phy2mac_rate(
383 				((struct ofdm_phy_hdr *) plcp)->rlpt[0]);
384 	else
385 		rspec = cck_phy2mac_rate(
386 				((struct cck_phy_hdr *) plcp)->signal);
387 
388 	return rspec;
389 }
390 
391 /* copy rateset src to dst as-is (no masking or sorting) */
brcms_c_rateset_copy(const struct brcms_c_rateset * src,struct brcms_c_rateset * dst)392 void brcms_c_rateset_copy(const struct brcms_c_rateset *src,
393 			  struct brcms_c_rateset *dst)
394 {
395 	memcpy(dst, src, sizeof(struct brcms_c_rateset));
396 }
397 
398 /*
399  * Copy and selectively filter one rateset to another.
400  * 'basic_only' means only copy basic rates.
401  * 'rates' indicates cck (11b) and ofdm rates combinations.
402  *    - 0: cck and ofdm
403  *    - 1: cck only
404  *    - 2: ofdm only
405  * 'xmask' is the copy mask (typically 0x7f or 0xff).
406  */
407 void
brcms_c_rateset_filter(struct brcms_c_rateset * src,struct brcms_c_rateset * dst,bool basic_only,u8 rates,uint xmask,bool mcsallow)408 brcms_c_rateset_filter(struct brcms_c_rateset *src, struct brcms_c_rateset *dst,
409 		       bool basic_only, u8 rates, uint xmask, bool mcsallow)
410 {
411 	uint i;
412 	uint r;
413 	uint count;
414 
415 	count = 0;
416 	for (i = 0; i < src->count; i++) {
417 		r = src->rates[i];
418 		if (basic_only && !(r & BRCMS_RATE_FLAG))
419 			continue;
420 		if (rates == BRCMS_RATES_CCK &&
421 		    is_ofdm_rate((r & BRCMS_RATE_MASK)))
422 			continue;
423 		if (rates == BRCMS_RATES_OFDM &&
424 		    is_cck_rate((r & BRCMS_RATE_MASK)))
425 			continue;
426 		dst->rates[count++] = r & xmask;
427 	}
428 	dst->count = count;
429 	dst->htphy_membership = src->htphy_membership;
430 
431 	if (mcsallow && rates != BRCMS_RATES_CCK)
432 		memcpy(&dst->mcs[0], &src->mcs[0], MCSSET_LEN);
433 	else
434 		brcms_c_rateset_mcs_clear(dst);
435 }
436 
437 /* select rateset for a given phy_type and bandtype and filter it, sort it
438  * and fill rs_tgt with result
439  */
440 void
brcms_c_rateset_default(struct brcms_c_rateset * rs_tgt,const struct brcms_c_rateset * rs_hw,uint phy_type,int bandtype,bool cck_only,uint rate_mask,bool mcsallow,u8 bw,u8 txstreams)441 brcms_c_rateset_default(struct brcms_c_rateset *rs_tgt,
442 			const struct brcms_c_rateset *rs_hw,
443 			uint phy_type, int bandtype, bool cck_only,
444 			uint rate_mask, bool mcsallow, u8 bw, u8 txstreams)
445 {
446 	const struct brcms_c_rateset *rs_dflt;
447 	struct brcms_c_rateset rs_sel;
448 	if ((PHYTYPE_IS(phy_type, PHY_TYPE_HT)) ||
449 	    (PHYTYPE_IS(phy_type, PHY_TYPE_N)) ||
450 	    (PHYTYPE_IS(phy_type, PHY_TYPE_LCN)) ||
451 	    (PHYTYPE_IS(phy_type, PHY_TYPE_SSN))) {
452 		if (bandtype == BRCM_BAND_5G)
453 			rs_dflt = (bw == BRCMS_20_MHZ ?
454 				   &ofdm_mimo_rates : &ofdm_40bw_mimo_rates);
455 		else
456 			rs_dflt = (bw == BRCMS_20_MHZ ?
457 				   &cck_ofdm_mimo_rates :
458 				   &cck_ofdm_40bw_mimo_rates);
459 	} else if (PHYTYPE_IS(phy_type, PHY_TYPE_LP)) {
460 		rs_dflt = (bandtype == BRCM_BAND_5G) ?
461 			  &ofdm_rates : &cck_ofdm_rates;
462 	} else if (PHYTYPE_IS(phy_type, PHY_TYPE_A)) {
463 		rs_dflt = &ofdm_rates;
464 	} else if (PHYTYPE_IS(phy_type, PHY_TYPE_G)) {
465 		rs_dflt = &cck_ofdm_rates;
466 	} else {
467 		/* should not happen, error condition */
468 		rs_dflt = &cck_rates;	/* force cck */
469 	}
470 
471 	/* if hw rateset is not supplied, assign selected rateset to it */
472 	if (!rs_hw)
473 		rs_hw = rs_dflt;
474 
475 	brcms_c_rateset_copy(rs_dflt, &rs_sel);
476 	brcms_c_rateset_mcs_upd(&rs_sel, txstreams);
477 	brcms_c_rateset_filter(&rs_sel, rs_tgt, false,
478 			   cck_only ? BRCMS_RATES_CCK : BRCMS_RATES_CCK_OFDM,
479 			   rate_mask, mcsallow);
480 	brcms_c_rate_hwrs_filter_sort_validate(rs_tgt, rs_hw, false,
481 					   mcsallow ? txstreams : 1);
482 }
483 
brcms_c_rate_legacy_phyctl(uint rate)484 s16 brcms_c_rate_legacy_phyctl(uint rate)
485 {
486 	uint i;
487 	for (i = 0; i < LEGACY_PHYCFG_TABLE_SIZE; i++)
488 		if (rate == legacy_phycfg_table[i].rate_ofdm)
489 			return legacy_phycfg_table[i].tx_phy_ctl3;
490 
491 	return -1;
492 }
493 
brcms_c_rateset_mcs_clear(struct brcms_c_rateset * rateset)494 void brcms_c_rateset_mcs_clear(struct brcms_c_rateset *rateset)
495 {
496 	uint i;
497 	for (i = 0; i < MCSSET_LEN; i++)
498 		rateset->mcs[i] = 0;
499 }
500 
brcms_c_rateset_mcs_build(struct brcms_c_rateset * rateset,u8 txstreams)501 void brcms_c_rateset_mcs_build(struct brcms_c_rateset *rateset, u8 txstreams)
502 {
503 	memcpy(&rateset->mcs[0], &cck_ofdm_mimo_rates.mcs[0], MCSSET_LEN);
504 	brcms_c_rateset_mcs_upd(rateset, txstreams);
505 }
506 
507 /* Based on bandwidth passed, allow/disallow MCS 32 in the rateset */
brcms_c_rateset_bw_mcs_filter(struct brcms_c_rateset * rateset,u8 bw)508 void brcms_c_rateset_bw_mcs_filter(struct brcms_c_rateset *rateset, u8 bw)
509 {
510 	if (bw == BRCMS_40_MHZ)
511 		setbit(rateset->mcs, 32);
512 	else
513 		clrbit(rateset->mcs, 32);
514 }
515