--- /dev/null
+/*
+ * 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"
+#include "debug.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 ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom;
+
+ 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 = sprom->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 ((sprom->ant_available_bg == 7) ||
+ (sprom->ant_available_a == 7)) {
+ asi->antsel_avail = true;
+ } else if (
+ sprom->ant_available_bg == 3 ||
+ sprom->ant_available_a == 3) {
+ asi->antsel_avail = false;
+ } else {
+ asi->antsel_avail = false;
+ brcms_err(wlc->hw->d11core,
+ "antsel_attach: 2o3 "
+ "board cfg invalid\n");
+ }
+
+ break;
+ default:
+ break;
+ }
+ } else if ((asi->pub->sromrev == 4) &&
+ (sprom->ant_available_bg == 7) &&
+ (sprom->ant_available_a == 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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