diff options
Diffstat (limited to 'drivers/net/wireless/broadcom/brcm80211/brcmsmac/antsel.c')
| -rw-r--r-- | drivers/net/wireless/broadcom/brcm80211/brcmsmac/antsel.c | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/antsel.c b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/antsel.c new file mode 100644 index 000000000000..54c616919590 --- /dev/null +++ b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/antsel.c @@ -0,0 +1,309 @@ +/* + * 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; +} |