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linux/drivers/net/wireless/brcm80211/brcmsmac/antsel.c

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/*
* Copyright (c) 2010 Broadcom Corporation
*
* Permission to use, copy, modify, and/or 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 <linux/slab.h>
#include <net/mac80211.h>
#include "types.h"
#include "main.h"
#include "phy_shim.h"
#include "antsel.h"
#define ANT_SELCFG_AUTO 0x80 /* bit indicates antenna sel AUTO */
#define ANT_SELCFG_MASK 0x33 /* antenna configuration mask */
#define ANT_SELCFG_TX_UNICAST 0 /* unicast tx antenna configuration */
#define ANT_SELCFG_RX_UNICAST 1 /* unicast rx antenna configuration */
#define ANT_SELCFG_TX_DEF 2 /* default tx antenna configuration */
#define ANT_SELCFG_RX_DEF 3 /* default rx antenna configuration */
/* useful macros */
#define BRCMS_ANTSEL_11N_0(ant) ((((ant) & ANT_SELCFG_MASK) >> 4) & 0xf)
#define BRCMS_ANTSEL_11N_1(ant) (((ant) & ANT_SELCFG_MASK) & 0xf)
#define BRCMS_ANTIDX_11N(ant) (((BRCMS_ANTSEL_11N_0(ant)) << 2) +\
(BRCMS_ANTSEL_11N_1(ant)))
#define BRCMS_ANT_ISAUTO_11N(ant) (((ant) & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO)
#define BRCMS_ANTSEL_11N(ant) ((ant) & ANT_SELCFG_MASK)
/* antenna switch */
/* defines for no boardlevel antenna diversity */
#define ANT_SELCFG_DEF_2x2 0x01 /* default antenna configuration */
/* 2x3 antdiv defines and tables for GPIO communication */
#define ANT_SELCFG_NUM_2x3 3
#define ANT_SELCFG_DEF_2x3 0x01 /* default antenna configuration */
/* 2x4 antdiv rev4 defines and tables for GPIO communication */
#define ANT_SELCFG_NUM_2x4 4
#define ANT_SELCFG_DEF_2x4 0x02 /* default antenna configuration */
static const u16 mimo_2x4_div_antselpat_tbl[] = {
0, 0, 0x9, 0xa, /* ant0: 0 ant1: 2,3 */
0, 0, 0x5, 0x6, /* ant0: 1 ant1: 2,3 */
0, 0, 0, 0, /* n.a. */
0, 0, 0, 0 /* n.a. */
};
static const u8 mimo_2x4_div_antselid_tbl[16] = {
0, 0, 0, 0, 0, 2, 3, 0,
0, 0, 1, 0, 0, 0, 0, 0 /* pat to antselid */
};
static const u16 mimo_2x3_div_antselpat_tbl[] = {
16, 0, 1, 16, /* ant0: 0 ant1: 1,2 */
16, 16, 16, 16, /* n.a. */
16, 2, 16, 16, /* ant0: 2 ant1: 1 */
16, 16, 16, 16 /* n.a. */
};
static const u8 mimo_2x3_div_antselid_tbl[16] = {
0, 1, 2, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0 /* pat to antselid */
};
/* boardlevel antenna selection: init antenna selection structure */
static void
brcms_c_antsel_init_cfg(struct antsel_info *asi, struct brcms_antselcfg *antsel,
bool auto_sel)
{
if (asi->antsel_type == ANTSEL_2x3) {
u8 antcfg_def = ANT_SELCFG_DEF_2x3 |
((asi->antsel_avail && auto_sel) ? ANT_SELCFG_AUTO : 0);
antsel->ant_config[ANT_SELCFG_TX_DEF] = antcfg_def;
antsel->ant_config[ANT_SELCFG_TX_UNICAST] = antcfg_def;
antsel->ant_config[ANT_SELCFG_RX_DEF] = antcfg_def;
antsel->ant_config[ANT_SELCFG_RX_UNICAST] = antcfg_def;
antsel->num_antcfg = ANT_SELCFG_NUM_2x3;
} else if (asi->antsel_type == ANTSEL_2x4) {
antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x4;
antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x4;
antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x4;
antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x4;
antsel->num_antcfg = ANT_SELCFG_NUM_2x4;
} else { /* no antenna selection available */
antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x2;
antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x2;
antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x2;
antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x2;
antsel->num_antcfg = 0;
}
}
struct antsel_info *brcms_c_antsel_attach(struct brcms_c_info *wlc)
{
struct antsel_info *asi;
struct si_pub *sih = wlc->hw->sih;
asi = kzalloc(sizeof(struct antsel_info), GFP_ATOMIC);
if (!asi)
return NULL;
asi->wlc = wlc;
asi->pub = wlc->pub;
asi->antsel_type = ANTSEL_NA;
asi->antsel_avail = false;
asi->antsel_antswitch = (u8) getintvar(sih, BRCMS_SROM_ANTSWITCH);
if ((asi->pub->sromrev >= 4) && (asi->antsel_antswitch != 0)) {
switch (asi->antsel_antswitch) {
case ANTSWITCH_TYPE_1:
case ANTSWITCH_TYPE_2:
case ANTSWITCH_TYPE_3:
/* 4321/2 board with 2x3 switch logic */
asi->antsel_type = ANTSEL_2x3;
/* Antenna selection availability */
if (((u16) getintvar(sih, BRCMS_SROM_AA2G) == 7) ||
((u16) getintvar(sih, BRCMS_SROM_AA5G) == 7)) {
asi->antsel_avail = true;
} else if (
(u16) getintvar(sih, BRCMS_SROM_AA2G) == 3 ||
(u16) getintvar(sih, BRCMS_SROM_AA5G) == 3) {
asi->antsel_avail = false;
} else {
asi->antsel_avail = false;
wiphy_err(wlc->wiphy, "antsel_attach: 2o3 "
"board cfg invalid\n");
}
break;
default:
break;
}
} else if ((asi->pub->sromrev == 4) &&
((u16) getintvar(sih, BRCMS_SROM_AA2G) == 7) &&
((u16) getintvar(sih, BRCMS_SROM_AA5G) == 0)) {
/* hack to match old 4321CB2 cards with 2of3 antenna switch */
asi->antsel_type = ANTSEL_2x3;
asi->antsel_avail = true;
} else if (asi->pub->boardflags2 & BFL2_2X4_DIV) {
asi->antsel_type = ANTSEL_2x4;
asi->antsel_avail = true;
}
/* Set the antenna selection type for the low driver */
brcms_b_antsel_type_set(wlc->hw, asi->antsel_type);
/* Init (auto/manual) antenna selection */
brcms_c_antsel_init_cfg(asi, &asi->antcfg_11n, true);
brcms_c_antsel_init_cfg(asi, &asi->antcfg_cur, true);
return asi;
}
void brcms_c_antsel_detach(struct antsel_info *asi)
{
kfree(asi);
}
/*
* boardlevel antenna selection:
* convert ant_cfg to mimo_antsel (ucode interface)
*/
static u16 brcms_c_antsel_antcfg2antsel(struct antsel_info *asi, u8 ant_cfg)
{
u8 idx = BRCMS_ANTIDX_11N(BRCMS_ANTSEL_11N(ant_cfg));
u16 mimo_antsel = 0;
if (asi->antsel_type == ANTSEL_2x4) {
/* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
mimo_antsel = (mimo_2x4_div_antselpat_tbl[idx] & 0xf);
return mimo_antsel;
} else if (asi->antsel_type == ANTSEL_2x3) {
/* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
mimo_antsel = (mimo_2x3_div_antselpat_tbl[idx] & 0xf);
return mimo_antsel;
}
return mimo_antsel;
}
/* boardlevel antenna selection: ucode interface control */
static int brcms_c_antsel_cfgupd(struct antsel_info *asi,
struct brcms_antselcfg *antsel)
{
struct brcms_c_info *wlc = asi->wlc;
u8 ant_cfg;
u16 mimo_antsel;
/* 1) Update TX antconfig for all frames that are not unicast data
* (aka default TX)
*/
ant_cfg = antsel->ant_config[ANT_SELCFG_TX_DEF];
mimo_antsel = brcms_c_antsel_antcfg2antsel(asi, ant_cfg);
brcms_b_write_shm(wlc->hw, M_MIMO_ANTSEL_TXDFLT, mimo_antsel);
/*
* Update driver stats for currently selected
* default tx/rx antenna config
*/
asi->antcfg_cur.ant_config[ANT_SELCFG_TX_DEF] = ant_cfg;
/* 2) Update RX antconfig for all frames that are not unicast data
* (aka default RX)
*/
ant_cfg = antsel->ant_config[ANT_SELCFG_RX_DEF];
mimo_antsel = brcms_c_antsel_antcfg2antsel(asi, ant_cfg);
brcms_b_write_shm(wlc->hw, M_MIMO_ANTSEL_RXDFLT, mimo_antsel);
/*
* Update driver stats for currently selected
* default tx/rx antenna config
*/
asi->antcfg_cur.ant_config[ANT_SELCFG_RX_DEF] = ant_cfg;
return 0;
}
void brcms_c_antsel_init(struct antsel_info *asi)
{
if ((asi->antsel_type == ANTSEL_2x3) ||
(asi->antsel_type == ANTSEL_2x4))
brcms_c_antsel_cfgupd(asi, &asi->antcfg_11n);
}
/* boardlevel antenna selection: convert id to ant_cfg */
static u8 brcms_c_antsel_id2antcfg(struct antsel_info *asi, u8 id)
{
u8 antcfg = ANT_SELCFG_DEF_2x2;
if (asi->antsel_type == ANTSEL_2x4) {
/* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
antcfg = (((id & 0x2) << 3) | ((id & 0x1) + 2));
return antcfg;
} else if (asi->antsel_type == ANTSEL_2x3) {
/* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
antcfg = (((id & 0x02) << 4) | ((id & 0x1) + 1));
return antcfg;
}
return antcfg;
}
void
brcms_c_antsel_antcfg_get(struct antsel_info *asi, bool usedef, bool sel,
u8 antselid, u8 fbantselid, u8 *antcfg,
u8 *fbantcfg)
{
u8 ant;
/* if use default, assign it and return */
if (usedef) {
*antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_DEF];
*fbantcfg = *antcfg;
return;
}
if (!sel) {
*antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
*fbantcfg = *antcfg;
} else {
ant = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
if ((ant & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO) {
*antcfg = brcms_c_antsel_id2antcfg(asi, antselid);
*fbantcfg = brcms_c_antsel_id2antcfg(asi, fbantselid);
} else {
*antcfg =
asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
*fbantcfg = *antcfg;
}
}
return;
}
/* boardlevel antenna selection: convert mimo_antsel (ucode interface) to id */
u8 brcms_c_antsel_antsel2id(struct antsel_info *asi, u16 antsel)
{
u8 antselid = 0;
if (asi->antsel_type == ANTSEL_2x4) {
/* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
antselid = mimo_2x4_div_antselid_tbl[(antsel & 0xf)];
return antselid;
} else if (asi->antsel_type == ANTSEL_2x3) {
/* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
antselid = mimo_2x3_div_antselid_tbl[(antsel & 0xf)];
return antselid;
}
return antselid;
}
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