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