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