1 files changed, 307 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/antsel.c b/drivers/net/wireless/brcm80211/brcmsmac/antsel.c
new file mode 100644
index 000000000000..a47ce25cb9a2
--- /dev/null
+++ b/drivers/net/wireless/brcm80211/brcmsmac/antsel.c
@@ -0,0 +1,307 @@
+/*
+ * 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;
+}