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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
* All rights reserved.
*
* Purpose: Provide functions to setup NIC operation mode
* Functions:
* vnt_set_rspinf - Set RSPINF
* vnt_update_ifs - Update slotTime,SIFS,DIFS, and EIFS
* vnt_update_top_rates - Update BasicTopRate
* vnt_add_basic_rate - Add to BasicRateSet
* vnt_ofdm_min_rate - Check if any OFDM rate is in BasicRateSet
* vnt_get_tsf_offset - Calculate TSFOffset
* vnt_get_current_tsf - Read Current NIC TSF counter
* vnt_get_next_tbtt - Calculate Next Beacon TSF counter
* vnt_reset_next_tbtt - Set NIC Beacon time
* vnt_update_next_tbtt - Sync. NIC Beacon time
* vnt_radio_power_off - Turn Off NIC Radio Power
* vnt_radio_power_on - Turn On NIC Radio Power
*
* Revision History:
* 06-10-2003 Bryan YC Fan: Re-write codes to support VT3253 spec.
* 08-26-2003 Kyle Hsu: Modify the definition type of dwIoBase.
* 09-01-2003 Bryan YC Fan: Add vnt_update_ifs().
*
*/
#include <linux/bitops.h>
#include <linux/errno.h>
#include "device.h"
#include "card.h"
#include "baseband.h"
#include "mac.h"
#include "desc.h"
#include "rf.h"
#include "power.h"
#include "key.h"
#include "usbpipe.h"
/* const u16 cw_rxbcntsf_off[MAX_RATE] =
* {17, 34, 96, 192, 34, 23, 17, 11, 8, 5, 4, 3};
*/
static const u16 cw_rxbcntsf_off[MAX_RATE] = {
192, 96, 34, 17, 34, 23, 17, 11, 8, 5, 4, 3
};
int vnt_set_channel(struct vnt_private *priv, u32 connection_channel)
{
int ret;
if (connection_channel > CB_MAX_CHANNEL || !connection_channel)
return -EINVAL;
/* clear NAV */
vnt_mac_reg_bits_on(priv, MAC_REG_MACCR, MACCR_CLRNAV);
/* Set Channel[7] = 0 to tell H/W channel is changing now. */
vnt_mac_reg_bits_off(priv, MAC_REG_CHANNEL,
(BIT(7) | BIT(5) | BIT(4)));
ret = vnt_control_out(priv, MESSAGE_TYPE_SELECT_CHANNEL,
connection_channel, 0, 0, NULL);
if (ret)
return ret;
return vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_CHANNEL,
(u8)(connection_channel | 0x80));
}
static const u8 vnt_rspinf_b_short_table[] = {
0x70, 0x00, 0x00, 0x00, 0x38, 0x00, 0x09, 0x00,
0x15, 0x00, 0x0a, 0x00, 0x0b, 0x00, 0x0b, 0x80
};
static const u8 vnt_rspinf_b_long_table[] = {
0x70, 0x00, 0x00, 0x00, 0x38, 0x00, 0x01, 0x00,
0x15, 0x00, 0x02, 0x00, 0x0b, 0x00, 0x03, 0x80
};
static const u8 vnt_rspinf_a_table[] = {
0x9b, 0x18, 0x9f, 0x10, 0x9a, 0x0a, 0x9e, 0x08, 0x99,
0x08, 0x9d, 0x04, 0x98, 0x04, 0x9c, 0x04, 0x9c, 0x04
};
static const u8 vnt_rspinf_gb_table[] = {
0x8b, 0x1e, 0x8f, 0x16, 0x8a, 0x12, 0x8e, 0x0e, 0x89,
0x0e, 0x8d, 0x0a, 0x88, 0x0a, 0x8c, 0x0a, 0x8c, 0x0a
};
int vnt_set_rspinf(struct vnt_private *priv, u8 bb_type)
{
const u8 *data;
u16 len;
int ret;
if (priv->preamble_type) {
data = vnt_rspinf_b_short_table;
len = ARRAY_SIZE(vnt_rspinf_b_short_table);
} else {
data = vnt_rspinf_b_long_table;
len = ARRAY_SIZE(vnt_rspinf_b_long_table);
}
/* RSPINF_b_1 to RSPINF_b_11 */
ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_RSPINF_B_1,
MESSAGE_REQUEST_MACREG, len, data);
if (ret)
return ret;
if (bb_type == BB_TYPE_11A) {
data = vnt_rspinf_a_table;
len = ARRAY_SIZE(vnt_rspinf_a_table);
} else {
data = vnt_rspinf_gb_table;
len = ARRAY_SIZE(vnt_rspinf_gb_table);
}
/* RSPINF_a_6 to RSPINF_a_72 */
return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_RSPINF_A_6,
MESSAGE_REQUEST_MACREG, len, data);
}
int vnt_update_ifs(struct vnt_private *priv)
{
u8 max_min = 0;
u8 data[4];
int ret;
if (priv->packet_type == PK_TYPE_11A) {
priv->slot = C_SLOT_SHORT;
priv->sifs = C_SIFS_A;
priv->difs = C_SIFS_A + 2 * C_SLOT_SHORT;
max_min = 4;
} else {
priv->sifs = C_SIFS_BG;
if (priv->short_slot_time) {
priv->slot = C_SLOT_SHORT;
max_min = 4;
} else {
priv->slot = C_SLOT_LONG;
max_min = 5;
}
priv->difs = C_SIFS_BG + 2 * priv->slot;
}
priv->eifs = C_EIFS;
data[0] = (u8)priv->sifs;
data[1] = (u8)priv->difs;
data[2] = (u8)priv->eifs;
data[3] = (u8)priv->slot;
ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_SIFS,
MESSAGE_REQUEST_MACREG, 4, &data[0]);
if (ret)
return ret;
max_min |= 0xa0;
return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_CWMAXMIN0,
MESSAGE_REQUEST_MACREG, 1, &max_min);
}
void vnt_update_top_rates(struct vnt_private *priv)
{
int pos;
pos = fls(priv->basic_rates & GENMASK(RATE_54M, RATE_6M));
priv->top_ofdm_basic_rate = pos ? (pos - 1) : RATE_24M;
pos = fls(priv->basic_rates & GENMASK(RATE_11M, RATE_1M));
priv->top_cck_basic_rate = pos ? (pos - 1) : RATE_1M;
}
bool vnt_ofdm_min_rate(struct vnt_private *priv)
{
return priv->basic_rates & GENMASK(RATE_54M, RATE_6M) ? true : false;
}
u8 vnt_get_pkt_type(struct vnt_private *priv)
{
if (priv->bb_type == BB_TYPE_11A || priv->bb_type == BB_TYPE_11B)
return (u8)priv->bb_type;
else if (vnt_ofdm_min_rate(priv))
return PK_TYPE_11GA;
return PK_TYPE_11GB;
}
/*
* Description: Calculate TSF offset of two TSF input
* Get TSF Offset from RxBCN's TSF and local TSF
*
* Parameters:
* In:
* rx_rate - rx rate.
* tsf1 - Rx BCN's TSF
* tsf2 - Local TSF
* Out:
* none
*
* Return Value: TSF Offset value
*
*/
u64 vnt_get_tsf_offset(u8 rx_rate, u64 tsf1, u64 tsf2)
{
return tsf1 - tsf2 - (u64)cw_rxbcntsf_off[rx_rate % MAX_RATE];
}
int vnt_adjust_tsf(struct vnt_private *priv, u8 rx_rate,
u64 time_stamp, u64 local_tsf)
{
u64 tsf_offset = 0;
u8 data[8];
tsf_offset = vnt_get_tsf_offset(rx_rate, time_stamp, local_tsf);
data[0] = (u8)tsf_offset;
data[1] = (u8)(tsf_offset >> 8);
data[2] = (u8)(tsf_offset >> 16);
data[3] = (u8)(tsf_offset >> 24);
data[4] = (u8)(tsf_offset >> 32);
data[5] = (u8)(tsf_offset >> 40);
data[6] = (u8)(tsf_offset >> 48);
data[7] = (u8)(tsf_offset >> 56);
return vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
MESSAGE_REQUEST_TSF, 0, 8, data);
}
/*
* Description: Read NIC TSF counter
* Get local TSF counter
*
* Parameters:
* In:
* priv - The adapter to be read
* Out:
* current_tsf - Current TSF counter
*
* Return Value: true if success; otherwise false
*
*/
bool vnt_get_current_tsf(struct vnt_private *priv, u64 *current_tsf)
{
*current_tsf = priv->current_tsf;
return true;
}
/*
* Description: Clear NIC TSF counter
* Clear local TSF counter
*
* Parameters:
* In:
* priv - The adapter to be read
*
* Return Value: true if success; otherwise false
*
*/
bool vnt_clear_current_tsf(struct vnt_private *priv)
{
vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTRST);
priv->current_tsf = 0;
return true;
}
/*
* Description: Read NIC TSF counter
* Get NEXTTBTT from adjusted TSF and Beacon Interval
*
* Parameters:
* In:
* tsf - Current TSF counter
* beacon_interval - Beacon Interval
* Out:
* tsf - Current TSF counter
*
* Return Value: TSF value of next Beacon
*
*/
u64 vnt_get_next_tbtt(u64 tsf, u16 beacon_interval)
{
u32 beacon_int;
beacon_int = beacon_interval * 1024;
/* Next TBTT =
* ((local_current_TSF / beacon_interval) + 1) * beacon_interval
*/
if (beacon_int) {
do_div(tsf, beacon_int);
tsf += 1;
tsf *= beacon_int;
}
return tsf;
}
int vnt_reset_next_tbtt(struct vnt_private *priv, u16 beacon_interval)
{
u64 next_tbtt = 0;
u8 data[8];
vnt_clear_current_tsf(priv);
next_tbtt = vnt_get_next_tbtt(next_tbtt, beacon_interval);
data[0] = (u8)next_tbtt;
data[1] = (u8)(next_tbtt >> 8);
data[2] = (u8)(next_tbtt >> 16);
data[3] = (u8)(next_tbtt >> 24);
data[4] = (u8)(next_tbtt >> 32);
data[5] = (u8)(next_tbtt >> 40);
data[6] = (u8)(next_tbtt >> 48);
data[7] = (u8)(next_tbtt >> 56);
return vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
MESSAGE_REQUEST_TBTT, 0, 8, data);
}
int vnt_update_next_tbtt(struct vnt_private *priv, u64 tsf,
u16 beacon_interval)
{
u8 data[8];
int ret;
tsf = vnt_get_next_tbtt(tsf, beacon_interval);
data[0] = (u8)tsf;
data[1] = (u8)(tsf >> 8);
data[2] = (u8)(tsf >> 16);
data[3] = (u8)(tsf >> 24);
data[4] = (u8)(tsf >> 32);
data[5] = (u8)(tsf >> 40);
data[6] = (u8)(tsf >> 48);
data[7] = (u8)(tsf >> 56);
ret = vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
MESSAGE_REQUEST_TBTT, 0, 8, data);
if (ret)
return ret;
dev_dbg(&priv->usb->dev, "%s TBTT: %8llx\n", __func__, tsf);
return 0;
}
/*
* Description: Turn off Radio power
*
* Parameters:
* In:
* priv - The adapter to be turned off
* Out:
* none
*
* Return Value: true if success; otherwise false
*
*/
int vnt_radio_power_off(struct vnt_private *priv)
{
int ret = 0;
switch (priv->rf_type) {
case RF_AL2230:
case RF_AL2230S:
case RF_VT3226:
case RF_VT3226D0:
ret = vnt_mac_reg_bits_off(priv, MAC_REG_SOFTPWRCTL,
(SOFTPWRCTL_SWPE2 |
SOFTPWRCTL_SWPE3));
break;
}
if (ret)
goto end;
ret = vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_RXON);
if (ret)
goto end;
ret = vnt_set_deep_sleep(priv);
if (ret)
goto end;
ret = vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL1, GPIO3_INTMD);
end:
return ret;
}
/*
* Description: Turn on Radio power
*
* Parameters:
* In:
* priv - The adapter to be turned on
* Out:
* none
*
* Return Value: true if success; otherwise false
*
*/
int vnt_radio_power_on(struct vnt_private *priv)
{
int ret = 0;
ret = vnt_exit_deep_sleep(priv);
if (ret)
return ret;
ret = vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_RXON);
if (ret)
return ret;
switch (priv->rf_type) {
case RF_AL2230:
case RF_AL2230S:
case RF_VT3226:
case RF_VT3226D0:
ret = vnt_mac_reg_bits_on(priv, MAC_REG_SOFTPWRCTL,
(SOFTPWRCTL_SWPE2 |
SOFTPWRCTL_SWPE3));
if (ret)
return ret;
}
return vnt_mac_reg_bits_off(priv, MAC_REG_GPIOCTL1, GPIO3_INTMD);
}
int vnt_set_bss_mode(struct vnt_private *priv)
{
int ret;
unsigned char type = priv->bb_type;
unsigned char data = 0;
unsigned char bb_vga_2_3 = 0x00;
ret = vnt_mac_set_bb_type(priv, type);
if (ret)
return ret;
priv->packet_type = vnt_get_pkt_type(priv);
if (priv->bb_type == BB_TYPE_11A) {
data = 0x03;
bb_vga_2_3 = 0x10;
} else if (priv->bb_type == BB_TYPE_11B) {
data = 0x02;
} else if (priv->bb_type == BB_TYPE_11G) {
data = 0x08;
}
if (data) {
ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
0x88, data);
if (ret)
return ret;
}
ret = vnt_update_ifs(priv);
if (ret)
return ret;
ret = vnt_set_rspinf(priv, priv->bb_type);
if (ret)
return ret;
priv->bb_vga[2] = bb_vga_2_3;
priv->bb_vga[3] = bb_vga_2_3;
return vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
}