1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
4 * All rights reserved.
5 *
6 * File: card.c
7 * Purpose: Provide functions to setup NIC operation mode
8 * Functions:
9 * vnt_set_rspinf - Set RSPINF
10 * vnt_update_ifs - Update slotTime,SIFS,DIFS, and EIFS
11 * vnt_update_top_rates - Update BasicTopRate
12 * vnt_add_basic_rate - Add to BasicRateSet
13 * vnt_ofdm_min_rate - Check if any OFDM rate is in BasicRateSet
14 * vnt_get_tsf_offset - Calculate TSFOffset
15 * vnt_get_current_tsf - Read Current NIC TSF counter
16 * vnt_get_next_tbtt - Calculate Next Beacon TSF counter
17 * vnt_reset_next_tbtt - Set NIC Beacon time
18 * vnt_update_next_tbtt - Sync. NIC Beacon time
19 * vnt_radio_power_off - Turn Off NIC Radio Power
20 * vnt_radio_power_on - Turn On NIC Radio Power
21 *
22 * Revision History:
23 * 06-10-2003 Bryan YC Fan: Re-write codes to support VT3253 spec.
24 * 08-26-2003 Kyle Hsu: Modify the definition type of dwIoBase.
25 * 09-01-2003 Bryan YC Fan: Add vnt_update_ifs().
26 *
27 */
28
29 #include <linux/bitops.h>
30 #include <linux/errno.h>
31 #include "device.h"
32 #include "card.h"
33 #include "baseband.h"
34 #include "mac.h"
35 #include "desc.h"
36 #include "rf.h"
37 #include "power.h"
38 #include "key.h"
39 #include "usbpipe.h"
40
41 /* const u16 cw_rxbcntsf_off[MAX_RATE] =
42 * {17, 34, 96, 192, 34, 23, 17, 11, 8, 5, 4, 3};
43 */
44
45 static const u16 cw_rxbcntsf_off[MAX_RATE] = {
46 192, 96, 34, 17, 34, 23, 17, 11, 8, 5, 4, 3
47 };
48
vnt_set_channel(struct vnt_private * priv,u32 connection_channel)49 int vnt_set_channel(struct vnt_private *priv, u32 connection_channel)
50 {
51 int ret;
52
53 if (connection_channel > CB_MAX_CHANNEL || !connection_channel)
54 return -EINVAL;
55
56 /* clear NAV */
57 vnt_mac_reg_bits_on(priv, MAC_REG_MACCR, MACCR_CLRNAV);
58
59 /* Set Channel[7] = 0 to tell H/W channel is changing now. */
60 vnt_mac_reg_bits_off(priv, MAC_REG_CHANNEL,
61 (BIT(7) | BIT(5) | BIT(4)));
62
63 ret = vnt_control_out(priv, MESSAGE_TYPE_SELECT_CHANNEL,
64 connection_channel, 0, 0, NULL);
65 if (ret)
66 return ret;
67
68 return vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_CHANNEL,
69 (u8)(connection_channel | 0x80));
70 }
71
72 static const u8 vnt_rspinf_b_short_table[] = {
73 0x70, 0x00, 0x00, 0x00, 0x38, 0x00, 0x09, 0x00,
74 0x15, 0x00, 0x0a, 0x00, 0x0b, 0x00, 0x0b, 0x80
75 };
76
77 static const u8 vnt_rspinf_b_long_table[] = {
78 0x70, 0x00, 0x00, 0x00, 0x38, 0x00, 0x01, 0x00,
79 0x15, 0x00, 0x02, 0x00, 0x0b, 0x00, 0x03, 0x80
80 };
81
82 static const u8 vnt_rspinf_a_table[] = {
83 0x9b, 0x18, 0x9f, 0x10, 0x9a, 0x0a, 0x9e, 0x08, 0x99,
84 0x08, 0x9d, 0x04, 0x98, 0x04, 0x9c, 0x04, 0x9c, 0x04
85 };
86
87 static const u8 vnt_rspinf_gb_table[] = {
88 0x8b, 0x1e, 0x8f, 0x16, 0x8a, 0x12, 0x8e, 0x0e, 0x89,
89 0x0e, 0x8d, 0x0a, 0x88, 0x0a, 0x8c, 0x0a, 0x8c, 0x0a
90 };
91
vnt_set_rspinf(struct vnt_private * priv,u8 bb_type)92 int vnt_set_rspinf(struct vnt_private *priv, u8 bb_type)
93 {
94 const u8 *data;
95 u16 len;
96 int ret;
97
98 if (priv->preamble_type) {
99 data = vnt_rspinf_b_short_table;
100 len = ARRAY_SIZE(vnt_rspinf_b_short_table);
101 } else {
102 data = vnt_rspinf_b_long_table;
103 len = ARRAY_SIZE(vnt_rspinf_b_long_table);
104 }
105
106 /* RSPINF_b_1 to RSPINF_b_11 */
107 ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_RSPINF_B_1,
108 MESSAGE_REQUEST_MACREG, len, data);
109 if (ret)
110 return ret;
111
112 if (bb_type == BB_TYPE_11A) {
113 data = vnt_rspinf_a_table;
114 len = ARRAY_SIZE(vnt_rspinf_a_table);
115 } else {
116 data = vnt_rspinf_gb_table;
117 len = ARRAY_SIZE(vnt_rspinf_gb_table);
118 }
119
120 /* RSPINF_a_6 to RSPINF_a_72 */
121 return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_RSPINF_A_6,
122 MESSAGE_REQUEST_MACREG, len, data);
123 }
124
vnt_update_ifs(struct vnt_private * priv)125 int vnt_update_ifs(struct vnt_private *priv)
126 {
127 u8 max_min = 0;
128 u8 data[4];
129 int ret;
130
131 if (priv->packet_type == PK_TYPE_11A) {
132 priv->slot = C_SLOT_SHORT;
133 priv->sifs = C_SIFS_A;
134 priv->difs = C_SIFS_A + 2 * C_SLOT_SHORT;
135 max_min = 4;
136 } else {
137 priv->sifs = C_SIFS_BG;
138
139 if (priv->short_slot_time) {
140 priv->slot = C_SLOT_SHORT;
141 max_min = 4;
142 } else {
143 priv->slot = C_SLOT_LONG;
144 max_min = 5;
145 }
146
147 priv->difs = C_SIFS_BG + 2 * priv->slot;
148 }
149
150 priv->eifs = C_EIFS;
151
152 data[0] = (u8)priv->sifs;
153 data[1] = (u8)priv->difs;
154 data[2] = (u8)priv->eifs;
155 data[3] = (u8)priv->slot;
156
157 ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_SIFS,
158 MESSAGE_REQUEST_MACREG, 4, &data[0]);
159 if (ret)
160 return ret;
161
162 max_min |= 0xa0;
163
164 return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_CWMAXMIN0,
165 MESSAGE_REQUEST_MACREG, 1, &max_min);
166 }
167
vnt_update_top_rates(struct vnt_private * priv)168 void vnt_update_top_rates(struct vnt_private *priv)
169 {
170 int pos;
171
172 pos = fls(priv->basic_rates & GENMASK(RATE_54M, RATE_6M));
173 priv->top_ofdm_basic_rate = pos ? (pos - 1) : RATE_24M;
174
175 pos = fls(priv->basic_rates & GENMASK(RATE_11M, RATE_1M));
176 priv->top_cck_basic_rate = pos ? (pos - 1) : RATE_1M;
177 }
178
vnt_ofdm_min_rate(struct vnt_private * priv)179 bool vnt_ofdm_min_rate(struct vnt_private *priv)
180 {
181 return priv->basic_rates & GENMASK(RATE_54M, RATE_6M) ? true : false;
182 }
183
vnt_get_pkt_type(struct vnt_private * priv)184 u8 vnt_get_pkt_type(struct vnt_private *priv)
185 {
186 if (priv->bb_type == BB_TYPE_11A || priv->bb_type == BB_TYPE_11B)
187 return (u8)priv->bb_type;
188 else if (vnt_ofdm_min_rate(priv))
189 return PK_TYPE_11GA;
190 return PK_TYPE_11GB;
191 }
192
193 /*
194 * Description: Calculate TSF offset of two TSF input
195 * Get TSF Offset from RxBCN's TSF and local TSF
196 *
197 * Parameters:
198 * In:
199 * rx_rate - rx rate.
200 * tsf1 - Rx BCN's TSF
201 * tsf2 - Local TSF
202 * Out:
203 * none
204 *
205 * Return Value: TSF Offset value
206 *
207 */
vnt_get_tsf_offset(u8 rx_rate,u64 tsf1,u64 tsf2)208 u64 vnt_get_tsf_offset(u8 rx_rate, u64 tsf1, u64 tsf2)
209 {
210 return tsf1 - tsf2 - (u64)cw_rxbcntsf_off[rx_rate % MAX_RATE];
211 }
212
vnt_adjust_tsf(struct vnt_private * priv,u8 rx_rate,u64 time_stamp,u64 local_tsf)213 int vnt_adjust_tsf(struct vnt_private *priv, u8 rx_rate,
214 u64 time_stamp, u64 local_tsf)
215 {
216 u64 tsf_offset = 0;
217 u8 data[8];
218
219 tsf_offset = vnt_get_tsf_offset(rx_rate, time_stamp, local_tsf);
220
221 data[0] = (u8)tsf_offset;
222 data[1] = (u8)(tsf_offset >> 8);
223 data[2] = (u8)(tsf_offset >> 16);
224 data[3] = (u8)(tsf_offset >> 24);
225 data[4] = (u8)(tsf_offset >> 32);
226 data[5] = (u8)(tsf_offset >> 40);
227 data[6] = (u8)(tsf_offset >> 48);
228 data[7] = (u8)(tsf_offset >> 56);
229
230 return vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
231 MESSAGE_REQUEST_TSF, 0, 8, data);
232 }
233
234 /*
235 * Description: Read NIC TSF counter
236 * Get local TSF counter
237 *
238 * Parameters:
239 * In:
240 * priv - The adapter to be read
241 * Out:
242 * current_tsf - Current TSF counter
243 *
244 * Return Value: true if success; otherwise false
245 *
246 */
vnt_get_current_tsf(struct vnt_private * priv,u64 * current_tsf)247 bool vnt_get_current_tsf(struct vnt_private *priv, u64 *current_tsf)
248 {
249 *current_tsf = priv->current_tsf;
250
251 return true;
252 }
253
254 /*
255 * Description: Clear NIC TSF counter
256 * Clear local TSF counter
257 *
258 * Parameters:
259 * In:
260 * priv - The adapter to be read
261 *
262 * Return Value: true if success; otherwise false
263 *
264 */
vnt_clear_current_tsf(struct vnt_private * priv)265 bool vnt_clear_current_tsf(struct vnt_private *priv)
266 {
267 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTRST);
268
269 priv->current_tsf = 0;
270
271 return true;
272 }
273
274 /*
275 * Description: Read NIC TSF counter
276 * Get NEXTTBTT from adjusted TSF and Beacon Interval
277 *
278 * Parameters:
279 * In:
280 * tsf - Current TSF counter
281 * beacon_interval - Beacon Interval
282 * Out:
283 * tsf - Current TSF counter
284 *
285 * Return Value: TSF value of next Beacon
286 *
287 */
vnt_get_next_tbtt(u64 tsf,u16 beacon_interval)288 u64 vnt_get_next_tbtt(u64 tsf, u16 beacon_interval)
289 {
290 u32 beacon_int;
291
292 beacon_int = beacon_interval * 1024;
293
294 /* Next TBTT =
295 * ((local_current_TSF / beacon_interval) + 1) * beacon_interval
296 */
297 if (beacon_int) {
298 do_div(tsf, beacon_int);
299 tsf += 1;
300 tsf *= beacon_int;
301 }
302
303 return tsf;
304 }
305
vnt_reset_next_tbtt(struct vnt_private * priv,u16 beacon_interval)306 int vnt_reset_next_tbtt(struct vnt_private *priv, u16 beacon_interval)
307 {
308 u64 next_tbtt = 0;
309 u8 data[8];
310
311 vnt_clear_current_tsf(priv);
312
313 next_tbtt = vnt_get_next_tbtt(next_tbtt, beacon_interval);
314
315 data[0] = (u8)next_tbtt;
316 data[1] = (u8)(next_tbtt >> 8);
317 data[2] = (u8)(next_tbtt >> 16);
318 data[3] = (u8)(next_tbtt >> 24);
319 data[4] = (u8)(next_tbtt >> 32);
320 data[5] = (u8)(next_tbtt >> 40);
321 data[6] = (u8)(next_tbtt >> 48);
322 data[7] = (u8)(next_tbtt >> 56);
323
324 return vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
325 MESSAGE_REQUEST_TBTT, 0, 8, data);
326 }
327
vnt_update_next_tbtt(struct vnt_private * priv,u64 tsf,u16 beacon_interval)328 int vnt_update_next_tbtt(struct vnt_private *priv, u64 tsf,
329 u16 beacon_interval)
330 {
331 u8 data[8];
332 int ret;
333
334 tsf = vnt_get_next_tbtt(tsf, beacon_interval);
335
336 data[0] = (u8)tsf;
337 data[1] = (u8)(tsf >> 8);
338 data[2] = (u8)(tsf >> 16);
339 data[3] = (u8)(tsf >> 24);
340 data[4] = (u8)(tsf >> 32);
341 data[5] = (u8)(tsf >> 40);
342 data[6] = (u8)(tsf >> 48);
343 data[7] = (u8)(tsf >> 56);
344
345 ret = vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
346 MESSAGE_REQUEST_TBTT, 0, 8, data);
347 if (ret)
348 return ret;
349
350 dev_dbg(&priv->usb->dev, "%s TBTT: %8llx\n", __func__, tsf);
351 return 0;
352 }
353
354 /*
355 * Description: Turn off Radio power
356 *
357 * Parameters:
358 * In:
359 * priv - The adapter to be turned off
360 * Out:
361 * none
362 *
363 * Return Value: true if success; otherwise false
364 *
365 */
vnt_radio_power_off(struct vnt_private * priv)366 int vnt_radio_power_off(struct vnt_private *priv)
367 {
368 int ret = 0;
369
370 switch (priv->rf_type) {
371 case RF_AL2230:
372 case RF_AL2230S:
373 case RF_AIROHA7230:
374 case RF_VT3226:
375 case RF_VT3226D0:
376 case RF_VT3342A0:
377 ret = vnt_mac_reg_bits_off(priv, MAC_REG_SOFTPWRCTL,
378 (SOFTPWRCTL_SWPE2 | SOFTPWRCTL_SWPE3));
379 break;
380 }
381
382 if (ret)
383 goto end;
384
385 ret = vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_RXON);
386 if (ret)
387 goto end;
388
389 ret = vnt_set_deep_sleep(priv);
390 if (ret)
391 goto end;
392
393 ret = vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL1, GPIO3_INTMD);
394
395 end:
396 return ret;
397 }
398
399 /*
400 * Description: Turn on Radio power
401 *
402 * Parameters:
403 * In:
404 * priv - The adapter to be turned on
405 * Out:
406 * none
407 *
408 * Return Value: true if success; otherwise false
409 *
410 */
vnt_radio_power_on(struct vnt_private * priv)411 int vnt_radio_power_on(struct vnt_private *priv)
412 {
413 int ret = 0;
414
415 ret = vnt_exit_deep_sleep(priv);
416 if (ret)
417 return ret;
418
419 ret = vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_RXON);
420 if (ret)
421 return ret;
422
423 switch (priv->rf_type) {
424 case RF_AL2230:
425 case RF_AL2230S:
426 case RF_AIROHA7230:
427 case RF_VT3226:
428 case RF_VT3226D0:
429 case RF_VT3342A0:
430 ret = vnt_mac_reg_bits_on(priv, MAC_REG_SOFTPWRCTL,
431 (SOFTPWRCTL_SWPE2 |
432 SOFTPWRCTL_SWPE3));
433 if (ret)
434 return ret;
435 }
436
437 return vnt_mac_reg_bits_off(priv, MAC_REG_GPIOCTL1, GPIO3_INTMD);
438 }
439
vnt_set_bss_mode(struct vnt_private * priv)440 int vnt_set_bss_mode(struct vnt_private *priv)
441 {
442 int ret;
443 unsigned char type = priv->bb_type;
444 unsigned char data = 0;
445 unsigned char bb_vga_0 = 0x1c;
446 unsigned char bb_vga_2_3 = 0x00;
447
448 if (priv->rf_type == RF_AIROHA7230 && priv->bb_type == BB_TYPE_11A)
449 type = BB_TYPE_11G;
450
451 ret = vnt_mac_set_bb_type(priv, type);
452 if (ret)
453 return ret;
454
455 priv->packet_type = vnt_get_pkt_type(priv);
456
457 if (priv->bb_type == BB_TYPE_11A) {
458 data = 0x03;
459 bb_vga_0 = 0x20;
460 bb_vga_2_3 = 0x10;
461 } else if (priv->bb_type == BB_TYPE_11B) {
462 data = 0x02;
463 } else if (priv->bb_type == BB_TYPE_11G) {
464 data = 0x08;
465 }
466
467 if (data) {
468 ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
469 0x88, data);
470 if (ret)
471 return ret;
472 }
473
474 ret = vnt_update_ifs(priv);
475 if (ret)
476 return ret;
477
478 ret = vnt_set_rspinf(priv, priv->bb_type);
479 if (ret)
480 return ret;
481
482 if (priv->rf_type == RF_AIROHA7230) {
483 priv->bb_vga[0] = bb_vga_0;
484
485 ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
486 0xe7, priv->bb_vga[0]);
487 if (ret)
488 return ret;
489 }
490
491 priv->bb_vga[2] = bb_vga_2_3;
492 priv->bb_vga[3] = bb_vga_2_3;
493
494 return vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
495 }
496