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rate.c
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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  */
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 
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
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 */
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) */
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
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
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 
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 
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 
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 */
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 }
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