308 lines
9.4 KiB
C
308 lines
9.4 KiB
C
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/*
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* Copyright (c) 2010 Broadcom Corporation
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/slab.h>
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#include <net/mac80211.h>
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#include "types.h"
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#include "main.h"
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#include "phy_shim.h"
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#include "antsel.h"
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#define ANT_SELCFG_AUTO 0x80 /* bit indicates antenna sel AUTO */
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#define ANT_SELCFG_MASK 0x33 /* antenna configuration mask */
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#define ANT_SELCFG_TX_UNICAST 0 /* unicast tx antenna configuration */
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#define ANT_SELCFG_RX_UNICAST 1 /* unicast rx antenna configuration */
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#define ANT_SELCFG_TX_DEF 2 /* default tx antenna configuration */
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#define ANT_SELCFG_RX_DEF 3 /* default rx antenna configuration */
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/* useful macros */
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#define BRCMS_ANTSEL_11N_0(ant) ((((ant) & ANT_SELCFG_MASK) >> 4) & 0xf)
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#define BRCMS_ANTSEL_11N_1(ant) (((ant) & ANT_SELCFG_MASK) & 0xf)
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#define BRCMS_ANTIDX_11N(ant) (((BRCMS_ANTSEL_11N_0(ant)) << 2) +\
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(BRCMS_ANTSEL_11N_1(ant)))
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#define BRCMS_ANT_ISAUTO_11N(ant) (((ant) & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO)
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#define BRCMS_ANTSEL_11N(ant) ((ant) & ANT_SELCFG_MASK)
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/* antenna switch */
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/* defines for no boardlevel antenna diversity */
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#define ANT_SELCFG_DEF_2x2 0x01 /* default antenna configuration */
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/* 2x3 antdiv defines and tables for GPIO communication */
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#define ANT_SELCFG_NUM_2x3 3
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#define ANT_SELCFG_DEF_2x3 0x01 /* default antenna configuration */
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/* 2x4 antdiv rev4 defines and tables for GPIO communication */
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#define ANT_SELCFG_NUM_2x4 4
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#define ANT_SELCFG_DEF_2x4 0x02 /* default antenna configuration */
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static const u16 mimo_2x4_div_antselpat_tbl[] = {
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0, 0, 0x9, 0xa, /* ant0: 0 ant1: 2,3 */
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0, 0, 0x5, 0x6, /* ant0: 1 ant1: 2,3 */
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0, 0, 0, 0, /* n.a. */
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0, 0, 0, 0 /* n.a. */
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};
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static const u8 mimo_2x4_div_antselid_tbl[16] = {
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0, 0, 0, 0, 0, 2, 3, 0,
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0, 0, 1, 0, 0, 0, 0, 0 /* pat to antselid */
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};
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static const u16 mimo_2x3_div_antselpat_tbl[] = {
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16, 0, 1, 16, /* ant0: 0 ant1: 1,2 */
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16, 16, 16, 16, /* n.a. */
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16, 2, 16, 16, /* ant0: 2 ant1: 1 */
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16, 16, 16, 16 /* n.a. */
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};
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static const u8 mimo_2x3_div_antselid_tbl[16] = {
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0, 1, 2, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0 /* pat to antselid */
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};
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/* boardlevel antenna selection: init antenna selection structure */
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static void
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brcms_c_antsel_init_cfg(struct antsel_info *asi, struct brcms_antselcfg *antsel,
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bool auto_sel)
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{
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if (asi->antsel_type == ANTSEL_2x3) {
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u8 antcfg_def = ANT_SELCFG_DEF_2x3 |
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((asi->antsel_avail && auto_sel) ? ANT_SELCFG_AUTO : 0);
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antsel->ant_config[ANT_SELCFG_TX_DEF] = antcfg_def;
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antsel->ant_config[ANT_SELCFG_TX_UNICAST] = antcfg_def;
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antsel->ant_config[ANT_SELCFG_RX_DEF] = antcfg_def;
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antsel->ant_config[ANT_SELCFG_RX_UNICAST] = antcfg_def;
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antsel->num_antcfg = ANT_SELCFG_NUM_2x3;
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} else if (asi->antsel_type == ANTSEL_2x4) {
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antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x4;
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antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x4;
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antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x4;
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antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x4;
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antsel->num_antcfg = ANT_SELCFG_NUM_2x4;
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} else { /* no antenna selection available */
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antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x2;
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antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x2;
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antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x2;
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antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x2;
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antsel->num_antcfg = 0;
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}
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}
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struct antsel_info *brcms_c_antsel_attach(struct brcms_c_info *wlc)
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{
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struct antsel_info *asi;
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struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom;
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asi = kzalloc(sizeof(struct antsel_info), GFP_ATOMIC);
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if (!asi)
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return NULL;
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asi->wlc = wlc;
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asi->pub = wlc->pub;
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asi->antsel_type = ANTSEL_NA;
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asi->antsel_avail = false;
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asi->antsel_antswitch = sprom->antswitch;
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if ((asi->pub->sromrev >= 4) && (asi->antsel_antswitch != 0)) {
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switch (asi->antsel_antswitch) {
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case ANTSWITCH_TYPE_1:
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case ANTSWITCH_TYPE_2:
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case ANTSWITCH_TYPE_3:
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/* 4321/2 board with 2x3 switch logic */
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asi->antsel_type = ANTSEL_2x3;
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/* Antenna selection availability */
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if ((sprom->ant_available_bg == 7) ||
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(sprom->ant_available_a == 7)) {
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asi->antsel_avail = true;
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} else if (
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sprom->ant_available_bg == 3 ||
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sprom->ant_available_a == 3) {
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asi->antsel_avail = false;
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} else {
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asi->antsel_avail = false;
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wiphy_err(wlc->wiphy, "antsel_attach: 2o3 "
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"board cfg invalid\n");
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}
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break;
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default:
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break;
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}
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} else if ((asi->pub->sromrev == 4) &&
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(sprom->ant_available_bg == 7) &&
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(sprom->ant_available_a == 0)) {
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/* hack to match old 4321CB2 cards with 2of3 antenna switch */
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asi->antsel_type = ANTSEL_2x3;
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asi->antsel_avail = true;
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} else if (asi->pub->boardflags2 & BFL2_2X4_DIV) {
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asi->antsel_type = ANTSEL_2x4;
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asi->antsel_avail = true;
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}
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/* Set the antenna selection type for the low driver */
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brcms_b_antsel_type_set(wlc->hw, asi->antsel_type);
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/* Init (auto/manual) antenna selection */
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brcms_c_antsel_init_cfg(asi, &asi->antcfg_11n, true);
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brcms_c_antsel_init_cfg(asi, &asi->antcfg_cur, true);
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return asi;
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}
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void brcms_c_antsel_detach(struct antsel_info *asi)
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{
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kfree(asi);
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}
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/*
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* boardlevel antenna selection:
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* convert ant_cfg to mimo_antsel (ucode interface)
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*/
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static u16 brcms_c_antsel_antcfg2antsel(struct antsel_info *asi, u8 ant_cfg)
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{
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u8 idx = BRCMS_ANTIDX_11N(BRCMS_ANTSEL_11N(ant_cfg));
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u16 mimo_antsel = 0;
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if (asi->antsel_type == ANTSEL_2x4) {
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/* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
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mimo_antsel = (mimo_2x4_div_antselpat_tbl[idx] & 0xf);
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return mimo_antsel;
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} else if (asi->antsel_type == ANTSEL_2x3) {
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/* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
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mimo_antsel = (mimo_2x3_div_antselpat_tbl[idx] & 0xf);
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return mimo_antsel;
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}
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return mimo_antsel;
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}
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/* boardlevel antenna selection: ucode interface control */
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static int brcms_c_antsel_cfgupd(struct antsel_info *asi,
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struct brcms_antselcfg *antsel)
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{
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struct brcms_c_info *wlc = asi->wlc;
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u8 ant_cfg;
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u16 mimo_antsel;
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/* 1) Update TX antconfig for all frames that are not unicast data
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* (aka default TX)
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*/
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ant_cfg = antsel->ant_config[ANT_SELCFG_TX_DEF];
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mimo_antsel = brcms_c_antsel_antcfg2antsel(asi, ant_cfg);
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brcms_b_write_shm(wlc->hw, M_MIMO_ANTSEL_TXDFLT, mimo_antsel);
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/*
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* Update driver stats for currently selected
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* default tx/rx antenna config
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*/
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asi->antcfg_cur.ant_config[ANT_SELCFG_TX_DEF] = ant_cfg;
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/* 2) Update RX antconfig for all frames that are not unicast data
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* (aka default RX)
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*/
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ant_cfg = antsel->ant_config[ANT_SELCFG_RX_DEF];
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mimo_antsel = brcms_c_antsel_antcfg2antsel(asi, ant_cfg);
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brcms_b_write_shm(wlc->hw, M_MIMO_ANTSEL_RXDFLT, mimo_antsel);
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/*
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* Update driver stats for currently selected
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* default tx/rx antenna config
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*/
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asi->antcfg_cur.ant_config[ANT_SELCFG_RX_DEF] = ant_cfg;
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return 0;
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}
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void brcms_c_antsel_init(struct antsel_info *asi)
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{
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if ((asi->antsel_type == ANTSEL_2x3) ||
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(asi->antsel_type == ANTSEL_2x4))
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brcms_c_antsel_cfgupd(asi, &asi->antcfg_11n);
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}
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/* boardlevel antenna selection: convert id to ant_cfg */
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static u8 brcms_c_antsel_id2antcfg(struct antsel_info *asi, u8 id)
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{
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u8 antcfg = ANT_SELCFG_DEF_2x2;
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if (asi->antsel_type == ANTSEL_2x4) {
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/* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
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antcfg = (((id & 0x2) << 3) | ((id & 0x1) + 2));
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return antcfg;
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} else if (asi->antsel_type == ANTSEL_2x3) {
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/* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
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antcfg = (((id & 0x02) << 4) | ((id & 0x1) + 1));
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return antcfg;
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}
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return antcfg;
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}
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void
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brcms_c_antsel_antcfg_get(struct antsel_info *asi, bool usedef, bool sel,
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u8 antselid, u8 fbantselid, u8 *antcfg,
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u8 *fbantcfg)
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{
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u8 ant;
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/* if use default, assign it and return */
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if (usedef) {
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*antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_DEF];
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*fbantcfg = *antcfg;
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return;
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}
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if (!sel) {
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*antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
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*fbantcfg = *antcfg;
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} else {
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ant = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
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if ((ant & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO) {
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*antcfg = brcms_c_antsel_id2antcfg(asi, antselid);
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*fbantcfg = brcms_c_antsel_id2antcfg(asi, fbantselid);
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} else {
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*antcfg =
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asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
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*fbantcfg = *antcfg;
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}
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}
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return;
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}
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/* boardlevel antenna selection: convert mimo_antsel (ucode interface) to id */
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u8 brcms_c_antsel_antsel2id(struct antsel_info *asi, u16 antsel)
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{
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u8 antselid = 0;
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if (asi->antsel_type == ANTSEL_2x4) {
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/* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
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antselid = mimo_2x4_div_antselid_tbl[(antsel & 0xf)];
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return antselid;
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} else if (asi->antsel_type == ANTSEL_2x3) {
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/* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
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antselid = mimo_2x3_div_antselid_tbl[(antsel & 0xf)];
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return antselid;
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}
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return antselid;
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}
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