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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 mode7 * Functions:8 *      vnt_set_rspinf - Set RSPINF9 *      vnt_update_ifs - Update slotTime,SIFS,DIFS, and EIFS10 *      vnt_update_top_rates - Update BasicTopRate11 *      vnt_add_basic_rate - Add to BasicRateSet12 *      vnt_ofdm_min_rate - Check if any OFDM rate is in BasicRateSet13 *      vnt_get_tsf_offset - Calculate TSFOffset14 *      vnt_get_next_tbtt - Calculate Next Beacon TSF counter15 *      vnt_reset_next_tbtt - Set NIC Beacon time16 *      vnt_update_next_tbtt - Sync. NIC Beacon time17 *      vnt_radio_power_off - Turn Off NIC Radio Power18 *      vnt_radio_power_on - Turn On NIC Radio Power19 *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 43static const u16 cw_rxbcntsf_off[MAX_RATE] = {44	192, 96, 34, 17, 34, 23, 17, 11, 8, 5, 4, 345};46 47int 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 70static const u8 vnt_rspinf_b_short_table[] = {71	0x70, 0x00, 0x00, 0x00, 0x38, 0x00, 0x09, 0x00,72	0x15, 0x00, 0x0a, 0x00, 0x0b, 0x00, 0x0b, 0x8073};74 75static const u8 vnt_rspinf_b_long_table[] = {76	0x70, 0x00, 0x00, 0x00, 0x38, 0x00, 0x01, 0x00,77	0x15, 0x00, 0x02, 0x00, 0x0b, 0x00, 0x03, 0x8078};79 80static 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, 0x0483};84 85static 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, 0x0a88};89 90int 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 123int 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 166void 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 177bool vnt_ofdm_min_rate(struct vnt_private *priv)178{179	return priv->basic_rates & GENMASK(RATE_54M, RATE_6M) ? true : false;180}181 182u8 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 input193 *              Get TSF Offset from RxBCN's TSF and local TSF194 *195 * Parameters:196 *  In:197 *      rx_rate	- rx rate.198 *      tsf1	- Rx BCN's TSF199 *      tsf2	- Local TSF200 *  Out:201 *      none202 *203 * Return Value: TSF Offset value204 *205 */206u64 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 211int 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 counter234 *              Clear local TSF counter235 *236 * Parameters:237 *  In:238 *      priv	- The adapter to be read239 *240 * Return Value: true if success; otherwise false241 *242 */243bool 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 counter254 *              Get NEXTTBTT from adjusted TSF and Beacon Interval255 *256 * Parameters:257 *  In:258 *      tsf		- Current TSF counter259 *      beacon_interval - Beacon Interval260 *  Out:261 *      tsf		- Current TSF counter262 *263 * Return Value: TSF value of next Beacon264 *265 */266u64 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_interval274	 */275	if (beacon_int) {276		do_div(tsf, beacon_int);277		tsf += 1;278		tsf *= beacon_int;279	}280 281	return tsf;282}283 284int 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 306int 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 power334 *335 * Parameters:336 *  In:337 *      priv         - The adapter to be turned off338 *  Out:339 *      none340 *341 * Return Value: true if success; otherwise false342 *343 */344int 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 372end:373	return ret;374}375 376/*377 * Description: Turn on Radio power378 *379 * Parameters:380 *  In:381 *      priv         - The adapter to be turned on382 *  Out:383 *      none384 *385 * Return Value: true if success; otherwise false386 *387 */388int 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 415int 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