/*-
* Copyright (c) 2017 Kevin Lo <kevlo@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_wlan.h"
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/linker.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <net/if_media.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <dev/rtwn/if_rtwnreg.h>
#include <dev/rtwn/if_rtwnvar.h>
#include <dev/rtwn/if_rtwn_debug.h>
#include <dev/rtwn/if_rtwn_ridx.h>
#include <dev/rtwn/if_rtwn_rx.h>
#include <dev/rtwn/rtl8192c/r92c.h>
#include <dev/rtwn/rtl8192e/r92e.h>
#include <dev/rtwn/rtl8192e/r92e_reg.h>
#include <dev/rtwn/rtl8192e/r92e_var.h>
static int
r92e_get_power_group(struct rtwn_softc *sc, struct ieee80211_channel *c)
{
uint8_t chan;
int group;
chan = rtwn_chan2centieee(c);
if (IEEE80211_IS_CHAN_2GHZ(c)) {
if (chan <= 2) group = 0;
else if (chan <= 5) group = 1;
else if (chan <= 8) group = 2;
else if (chan <= 11) group = 3;
else if (chan <= 14) group = 4;
else {
KASSERT(0, ("wrong 2GHz channel %d!\n", chan));
return (-1);
}
} else {
KASSERT(0, ("wrong channel band (flags %08X)\n", c->ic_flags));
return (-1);
}
return (group);
}
static void
r92e_get_txpower(struct rtwn_softc *sc, int chain, struct ieee80211_channel *c,
uint8_t power[RTWN_RIDX_COUNT])
{
struct r92e_softc *rs = sc->sc_priv;
int i, ridx, group, max_mcs;
/* Determine channel group. */
group = r92e_get_power_group(sc, c);
if (group == -1) { /* shouldn't happen */
device_printf(sc->sc_dev, "%s: incorrect channel\n", __func__);
return;
}
max_mcs = RTWN_RIDX_HT_MCS(sc->ntxchains * 8 - 1);
/* XXX regulatory */
/* XXX net80211 regulatory */
for (ridx = RTWN_RIDX_CCK1; ridx <= RTWN_RIDX_CCK11; ridx++)
power[ridx] = rs->cck_tx_pwr[chain][group];
for (ridx = RTWN_RIDX_OFDM6; ridx <= max_mcs; ridx++)
power[ridx] = rs->ht40_tx_pwr_2g[chain][group];
for (ridx = RTWN_RIDX_OFDM6; ridx <= RTWN_RIDX_OFDM54; ridx++)
power[ridx] += rs->ofdm_tx_pwr_diff_2g[chain][0];
for (i = 0; i < sc->ntxchains; i++) {
uint8_t min_mcs;
uint8_t pwr_diff;
if (IEEE80211_IS_CHAN_HT40(c))
pwr_diff = rs->bw40_tx_pwr_diff_2g[chain][i];
else
pwr_diff = rs->bw20_tx_pwr_diff_2g[chain][i];
min_mcs = RTWN_RIDX_HT_MCS(i * 8);
for (ridx = min_mcs; ridx <= max_mcs; ridx++)
power[ridx] += pwr_diff;
}
/* Apply max limit. */
for (ridx = RTWN_RIDX_CCK1; ridx <= max_mcs; ridx++) {
if (power[ridx] > R92C_MAX_TX_PWR)
power[ridx] = R92C_MAX_TX_PWR;
}
#ifdef RTWN_DEBUG
if (sc->sc_debug & RTWN_DEBUG_TXPWR) {
/* Dump per-rate Tx power values. */
printf("Tx power for chain %d:\n", chain);
for (ridx = RTWN_RIDX_CCK1; ridx < RTWN_RIDX_COUNT; ridx++)
printf("Rate %d = %u\n", ridx, power[ridx]);
}
#endif
}
static void
r92e_set_txpower(struct rtwn_softc *sc, struct ieee80211_channel *c)
{
uint8_t power[RTWN_RIDX_COUNT];
int i;
for (i = 0; i < sc->ntxchains; i++) {
memset(power, 0, sizeof(power));
/* Compute per-rate Tx power values. */
r92e_get_txpower(sc, i, c, power);
/* Write per-rate Tx power values to hardware. */
r92c_write_txpower(sc, i, power);
}
}
static void
r92e_set_bw40(struct rtwn_softc *sc, uint8_t chan, int prichlo)
{
int i;
rtwn_setbits_2(sc, R92C_WMAC_TRXPTCL_CTL, 0x100, 0x80);
rtwn_write_1(sc, R12A_DATA_SEC,
prichlo ? R12A_DATA_SEC_PRIM_DOWN_20 : R12A_DATA_SEC_PRIM_UP_20);
rtwn_bb_setbits(sc, R92C_FPGA0_RFMOD, 0, R92C_RFMOD_40MHZ);
rtwn_bb_setbits(sc, R92C_FPGA1_RFMOD, 0, R92C_RFMOD_40MHZ);
/* Select 40MHz bandwidth. */
for (i = 0; i < sc->nrxchains; i++)
rtwn_rf_setbits(sc, i, R92C_RF_CHNLBW,
R88E_RF_CHNLBW_BW20, 0x400);
/* Set CCK side band. */
rtwn_bb_setbits(sc, R92C_CCK0_SYSTEM,
R92C_CCK0_SYSTEM_CCK_SIDEBAND, (prichlo ? 0 : 1) << 4);
rtwn_bb_setbits(sc, R92C_OFDM1_LSTF, 0x0c00, (prichlo ? 1 : 2) << 10);
rtwn_bb_setbits(sc, R92C_FPGA0_ANAPARAM2,
R92C_FPGA0_ANAPARAM2_CBW20, 0);
rtwn_bb_setbits(sc, 0x818, 0x0c000000, (prichlo ? 2 : 1) << 26);
}
static void
r92e_set_bw20(struct rtwn_softc *sc, uint8_t chan)
{
int i;
rtwn_setbits_2(sc, R92C_WMAC_TRXPTCL_CTL, 0x180, 0);
rtwn_write_1(sc, R12A_DATA_SEC, R12A_DATA_SEC_NO_EXT);
rtwn_bb_setbits(sc, R92C_FPGA0_RFMOD, R92C_RFMOD_40MHZ, 0);
rtwn_bb_setbits(sc, R92C_FPGA1_RFMOD, R92C_RFMOD_40MHZ, 0);
/* Select 20MHz bandwidth. */
for (i = 0; i < sc->nrxchains; i++)
rtwn_rf_setbits(sc, i, R92C_RF_CHNLBW,
R88E_RF_CHNLBW_BW20, 0xc00);
rtwn_bb_setbits(sc, R92C_OFDM0_TXPSEUDONOISEWGT, 0xc0000000, 0);
}
void
r92e_set_chan(struct rtwn_softc *sc, struct ieee80211_channel *c)
{
struct r92e_softc *rs = sc->sc_priv;
u_int chan;
int i;
chan = rtwn_chan2centieee(c);
for (i = 0; i < sc->nrxchains; i++) {
rtwn_rf_write(sc, i, R92C_RF_CHNLBW,
RW(rs->rf_chnlbw[0], R92C_RF_CHNLBW_CHNL, chan));
}
if (IEEE80211_IS_CHAN_HT40(c))
r92e_set_bw40(sc, chan, IEEE80211_IS_CHAN_HT40U(c));
else
r92e_set_bw20(sc, chan);
/* Set Tx power for this new channel. */
r92e_set_txpower(sc, c);
}