xref: /freebsd/sys/dev/rtwn/rtl8192c/r92c_rf.c (revision 685dc743dc3b5645e34836464128e1c0558b404b)

/*	$OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $	*/

/*-
 * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
 * Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
 * Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/cdefs.h>
#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/rtl8192c/r92c.h>
#include <dev/rtwn/rtl8192c/r92c_reg.h>
#include <dev/rtwn/rtl8192c/r92c_var.h>
#include <dev/rtwn/rtl8192c/r92c_rom_defs.h>

uint32_t
r92c_rf_read(struct rtwn_softc *sc, int chain, uint8_t addr)
{
	struct r92c_softc *rs = sc->sc_priv;
	uint32_t reg[R92C_MAX_CHAINS], val;

	reg[0] = rtwn_bb_read(sc, R92C_HSSI_PARAM2(0));
	if (chain != 0)
		reg[chain] = rtwn_bb_read(sc, R92C_HSSI_PARAM2(chain));

	rtwn_bb_write(sc, R92C_HSSI_PARAM2(0),
	    reg[0] & ~R92C_HSSI_PARAM2_READ_EDGE);
	rtwn_delay(sc, rs->rf_read_delay[0]);

	rtwn_bb_write(sc, R92C_HSSI_PARAM2(chain),
	    RW(reg[chain], R92C_HSSI_PARAM2_READ_ADDR, addr) |
	    R92C_HSSI_PARAM2_READ_EDGE);
	rtwn_delay(sc, rs->rf_read_delay[1]);

	rtwn_bb_write(sc, R92C_HSSI_PARAM2(0),
	    reg[0] | R92C_HSSI_PARAM2_READ_EDGE);
	rtwn_delay(sc, rs->rf_read_delay[2]);

	if (rtwn_bb_read(sc, R92C_HSSI_PARAM1(chain)) & R92C_HSSI_PARAM1_PI)
		val = rtwn_bb_read(sc, R92C_HSPI_READBACK(chain));
	else
		val = rtwn_bb_read(sc, R92C_LSSI_READBACK(chain));
	return (MS(val, R92C_LSSI_READBACK_DATA));
}

void
r92c_rf_write(struct rtwn_softc *sc, int chain, uint8_t addr,
    uint32_t val)
{
	rtwn_bb_write(sc, R92C_LSSI_PARAM(chain),
	    SM(R92C_LSSI_PARAM_ADDR, addr) |
	    SM(R92C_LSSI_PARAM_DATA, val));
}