diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/btcoex.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/btcoex.c | 497 |
1 files changed, 0 insertions, 497 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/btcoex.c b/drivers/net/wireless/brcm80211/brcmfmac/btcoex.c deleted file mode 100644 index 4e33f96b3..000000000 --- a/drivers/net/wireless/brcm80211/brcmfmac/btcoex.c +++ /dev/null @@ -1,497 +0,0 @@ -/* - * Copyright (c) 2013 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 <linux/netdevice.h> -#include <net/cfg80211.h> - -#include <brcmu_wifi.h> -#include <brcmu_utils.h> -#include <defs.h> -#include "core.h" -#include "debug.h" -#include "fwil.h" -#include "fwil_types.h" -#include "btcoex.h" -#include "p2p.h" -#include "cfg80211.h" - -/* T1 start SCO/eSCO priority suppression */ -#define BRCMF_BTCOEX_OPPR_WIN_TIME 2000 - -/* BT registers values during DHCP */ -#define BRCMF_BT_DHCP_REG50 0x8022 -#define BRCMF_BT_DHCP_REG51 0 -#define BRCMF_BT_DHCP_REG64 0 -#define BRCMF_BT_DHCP_REG65 0 -#define BRCMF_BT_DHCP_REG71 0 -#define BRCMF_BT_DHCP_REG66 0x2710 -#define BRCMF_BT_DHCP_REG41 0x33 -#define BRCMF_BT_DHCP_REG68 0x190 - -/* number of samples for SCO detection */ -#define BRCMF_BT_SCO_SAMPLES 12 - -/** -* enum brcmf_btcoex_state - BT coex DHCP state machine states -* @BRCMF_BT_DHCP_IDLE: DCHP is idle -* @BRCMF_BT_DHCP_START: DHCP started, wait before -* boosting wifi priority -* @BRCMF_BT_DHCP_OPPR_WIN: graceful DHCP opportunity ended, -* boost wifi priority -* @BRCMF_BT_DHCP_FLAG_FORCE_TIMEOUT: wifi priority boost end, -* restore defaults -*/ -enum brcmf_btcoex_state { - BRCMF_BT_DHCP_IDLE, - BRCMF_BT_DHCP_START, - BRCMF_BT_DHCP_OPPR_WIN, - BRCMF_BT_DHCP_FLAG_FORCE_TIMEOUT -}; - -/** - * struct brcmf_btcoex_info - BT coex related information - * @vif: interface for which request was done. - * @timer: timer for DHCP state machine - * @timeout: configured timeout. - * @timer_on: DHCP timer active - * @dhcp_done: DHCP finished before T1/T2 timer expiration - * @bt_state: DHCP state machine state - * @work: DHCP state machine work - * @cfg: driver private data for cfg80211 interface - * @reg66: saved value of btc_params 66 - * @reg41: saved value of btc_params 41 - * @reg68: saved value of btc_params 68 - * @saved_regs_part1: flag indicating regs 66,41,68 - * have been saved - * @reg51: saved value of btc_params 51 - * @reg64: saved value of btc_params 64 - * @reg65: saved value of btc_params 65 - * @reg71: saved value of btc_params 71 - * @saved_regs_part1: flag indicating regs 50,51,64,65,71 - * have been saved - */ -struct brcmf_btcoex_info { - struct brcmf_cfg80211_vif *vif; - struct timer_list timer; - u16 timeout; - bool timer_on; - bool dhcp_done; - enum brcmf_btcoex_state bt_state; - struct work_struct work; - struct brcmf_cfg80211_info *cfg; - u32 reg66; - u32 reg41; - u32 reg68; - bool saved_regs_part1; - u32 reg50; - u32 reg51; - u32 reg64; - u32 reg65; - u32 reg71; - bool saved_regs_part2; -}; - -/** - * brcmf_btcoex_params_write() - write btc_params firmware variable - * @ifp: interface - * @addr: btc_params register number - * @data: data to write - */ -static s32 brcmf_btcoex_params_write(struct brcmf_if *ifp, u32 addr, u32 data) -{ - struct { - __le32 addr; - __le32 data; - } reg_write; - - reg_write.addr = cpu_to_le32(addr); - reg_write.data = cpu_to_le32(data); - return brcmf_fil_iovar_data_set(ifp, "btc_params", - ®_write, sizeof(reg_write)); -} - -/** - * brcmf_btcoex_params_read() - read btc_params firmware variable - * @ifp: interface - * @addr: btc_params register number - * @data: read data - */ -static s32 brcmf_btcoex_params_read(struct brcmf_if *ifp, u32 addr, u32 *data) -{ - *data = addr; - - return brcmf_fil_iovar_int_get(ifp, "btc_params", data); -} - -/** - * brcmf_btcoex_boost_wifi() - control BT SCO/eSCO parameters - * @btci: BT coex info - * @trump_sco: - * true - set SCO/eSCO parameters for compatibility - * during DHCP window - * false - restore saved parameter values - * - * Enhanced BT COEX settings for eSCO compatibility during DHCP window - */ -static void brcmf_btcoex_boost_wifi(struct brcmf_btcoex_info *btci, - bool trump_sco) -{ - struct brcmf_if *ifp = brcmf_get_ifp(btci->cfg->pub, 0); - - if (trump_sco && !btci->saved_regs_part2) { - /* this should reduce eSCO agressive - * retransmit w/o breaking it - */ - - /* save current */ - brcmf_dbg(INFO, "new SCO/eSCO coex algo {save & override}\n"); - brcmf_btcoex_params_read(ifp, 50, &btci->reg50); - brcmf_btcoex_params_read(ifp, 51, &btci->reg51); - brcmf_btcoex_params_read(ifp, 64, &btci->reg64); - brcmf_btcoex_params_read(ifp, 65, &btci->reg65); - brcmf_btcoex_params_read(ifp, 71, &btci->reg71); - - btci->saved_regs_part2 = true; - brcmf_dbg(INFO, - "saved bt_params[50,51,64,65,71]: 0x%x 0x%x 0x%x 0x%x 0x%x\n", - btci->reg50, btci->reg51, btci->reg64, - btci->reg65, btci->reg71); - - /* pacify the eSco */ - brcmf_btcoex_params_write(ifp, 50, BRCMF_BT_DHCP_REG50); - brcmf_btcoex_params_write(ifp, 51, BRCMF_BT_DHCP_REG51); - brcmf_btcoex_params_write(ifp, 64, BRCMF_BT_DHCP_REG64); - brcmf_btcoex_params_write(ifp, 65, BRCMF_BT_DHCP_REG65); - brcmf_btcoex_params_write(ifp, 71, BRCMF_BT_DHCP_REG71); - - } else if (btci->saved_regs_part2) { - /* restore previously saved bt params */ - brcmf_dbg(INFO, "Do new SCO/eSCO coex algo {restore}\n"); - brcmf_btcoex_params_write(ifp, 50, btci->reg50); - brcmf_btcoex_params_write(ifp, 51, btci->reg51); - brcmf_btcoex_params_write(ifp, 64, btci->reg64); - brcmf_btcoex_params_write(ifp, 65, btci->reg65); - brcmf_btcoex_params_write(ifp, 71, btci->reg71); - - brcmf_dbg(INFO, - "restored bt_params[50,51,64,65,71]: 0x%x 0x%x 0x%x 0x%x 0x%x\n", - btci->reg50, btci->reg51, btci->reg64, - btci->reg65, btci->reg71); - - btci->saved_regs_part2 = false; - } else { - brcmf_dbg(INFO, "attempted to restore not saved BTCOEX params\n"); - } -} - -/** - * brcmf_btcoex_is_sco_active() - check if SCO/eSCO is active - * @ifp: interface - * - * return: true if SCO/eSCO session is active - */ -static bool brcmf_btcoex_is_sco_active(struct brcmf_if *ifp) -{ - int ioc_res = 0; - bool res = false; - int sco_id_cnt = 0; - u32 param27; - int i; - - for (i = 0; i < BRCMF_BT_SCO_SAMPLES; i++) { - ioc_res = brcmf_btcoex_params_read(ifp, 27, ¶m27); - - if (ioc_res < 0) { - brcmf_err("ioc read btc params error\n"); - break; - } - - brcmf_dbg(INFO, "sample[%d], btc_params 27:%x\n", i, param27); - - if ((param27 & 0x6) == 2) { /* count both sco & esco */ - sco_id_cnt++; - } - - if (sco_id_cnt > 2) { - brcmf_dbg(INFO, - "sco/esco detected, pkt id_cnt:%d samples:%d\n", - sco_id_cnt, i); - res = true; - break; - } - } - brcmf_dbg(TRACE, "exit: result=%d\n", res); - return res; -} - -/** - * btcmf_btcoex_save_part1() - save first step parameters. - */ -static void btcmf_btcoex_save_part1(struct brcmf_btcoex_info *btci) -{ - struct brcmf_if *ifp = btci->vif->ifp; - - if (!btci->saved_regs_part1) { - /* Retrieve and save original reg value */ - brcmf_btcoex_params_read(ifp, 66, &btci->reg66); - brcmf_btcoex_params_read(ifp, 41, &btci->reg41); - brcmf_btcoex_params_read(ifp, 68, &btci->reg68); - btci->saved_regs_part1 = true; - brcmf_dbg(INFO, - "saved btc_params regs (66,41,68) 0x%x 0x%x 0x%x\n", - btci->reg66, btci->reg41, - btci->reg68); - } -} - -/** - * brcmf_btcoex_restore_part1() - restore first step parameters. - */ -static void brcmf_btcoex_restore_part1(struct brcmf_btcoex_info *btci) -{ - struct brcmf_if *ifp; - - if (btci->saved_regs_part1) { - btci->saved_regs_part1 = false; - ifp = btci->vif->ifp; - brcmf_btcoex_params_write(ifp, 66, btci->reg66); - brcmf_btcoex_params_write(ifp, 41, btci->reg41); - brcmf_btcoex_params_write(ifp, 68, btci->reg68); - brcmf_dbg(INFO, - "restored btc_params regs {66,41,68} 0x%x 0x%x 0x%x\n", - btci->reg66, btci->reg41, - btci->reg68); - } -} - -/** - * brcmf_btcoex_timerfunc() - BT coex timer callback - */ -static void brcmf_btcoex_timerfunc(ulong data) -{ - struct brcmf_btcoex_info *bt_local = (struct brcmf_btcoex_info *)data; - brcmf_dbg(TRACE, "enter\n"); - - bt_local->timer_on = false; - schedule_work(&bt_local->work); -} - -/** - * brcmf_btcoex_handler() - BT coex state machine work handler - * @work: work - */ -static void brcmf_btcoex_handler(struct work_struct *work) -{ - struct brcmf_btcoex_info *btci; - btci = container_of(work, struct brcmf_btcoex_info, work); - if (btci->timer_on) { - btci->timer_on = false; - del_timer_sync(&btci->timer); - } - - switch (btci->bt_state) { - case BRCMF_BT_DHCP_START: - /* DHCP started provide OPPORTUNITY window - to get DHCP address - */ - brcmf_dbg(INFO, "DHCP started\n"); - btci->bt_state = BRCMF_BT_DHCP_OPPR_WIN; - if (btci->timeout < BRCMF_BTCOEX_OPPR_WIN_TIME) { - mod_timer(&btci->timer, btci->timer.expires); - } else { - btci->timeout -= BRCMF_BTCOEX_OPPR_WIN_TIME; - mod_timer(&btci->timer, - jiffies + - msecs_to_jiffies(BRCMF_BTCOEX_OPPR_WIN_TIME)); - } - btci->timer_on = true; - break; - - case BRCMF_BT_DHCP_OPPR_WIN: - if (btci->dhcp_done) { - brcmf_dbg(INFO, "DHCP done before T1 expiration\n"); - goto idle; - } - - /* DHCP is not over yet, start lowering BT priority */ - brcmf_dbg(INFO, "DHCP T1:%d expired\n", - BRCMF_BTCOEX_OPPR_WIN_TIME); - brcmf_btcoex_boost_wifi(btci, true); - - btci->bt_state = BRCMF_BT_DHCP_FLAG_FORCE_TIMEOUT; - mod_timer(&btci->timer, - jiffies + msecs_to_jiffies(btci->timeout)); - btci->timer_on = true; - break; - - case BRCMF_BT_DHCP_FLAG_FORCE_TIMEOUT: - if (btci->dhcp_done) - brcmf_dbg(INFO, "DHCP done before T2 expiration\n"); - else - brcmf_dbg(INFO, "DHCP T2:%d expired\n", - BRCMF_BT_DHCP_FLAG_FORCE_TIMEOUT); - - goto idle; - - default: - brcmf_err("invalid state=%d !!!\n", btci->bt_state); - goto idle; - } - - return; - -idle: - btci->bt_state = BRCMF_BT_DHCP_IDLE; - btci->timer_on = false; - brcmf_btcoex_boost_wifi(btci, false); - cfg80211_crit_proto_stopped(&btci->vif->wdev, GFP_KERNEL); - brcmf_btcoex_restore_part1(btci); - btci->vif = NULL; -} - -/** - * brcmf_btcoex_attach() - initialize BT coex data - * @cfg: driver private cfg80211 data - * - * return: 0 on success - */ -int brcmf_btcoex_attach(struct brcmf_cfg80211_info *cfg) -{ - struct brcmf_btcoex_info *btci = NULL; - brcmf_dbg(TRACE, "enter\n"); - - btci = kmalloc(sizeof(struct brcmf_btcoex_info), GFP_KERNEL); - if (!btci) - return -ENOMEM; - - btci->bt_state = BRCMF_BT_DHCP_IDLE; - - /* Set up timer for BT */ - btci->timer_on = false; - btci->timeout = BRCMF_BTCOEX_OPPR_WIN_TIME; - init_timer(&btci->timer); - btci->timer.data = (ulong)btci; - btci->timer.function = brcmf_btcoex_timerfunc; - btci->cfg = cfg; - btci->saved_regs_part1 = false; - btci->saved_regs_part2 = false; - - INIT_WORK(&btci->work, brcmf_btcoex_handler); - - cfg->btcoex = btci; - return 0; -} - -/** - * brcmf_btcoex_detach - clean BT coex data - * @cfg: driver private cfg80211 data - */ -void brcmf_btcoex_detach(struct brcmf_cfg80211_info *cfg) -{ - brcmf_dbg(TRACE, "enter\n"); - - if (!cfg->btcoex) - return; - - if (cfg->btcoex->timer_on) { - cfg->btcoex->timer_on = false; - del_timer_sync(&cfg->btcoex->timer); - } - - cancel_work_sync(&cfg->btcoex->work); - - brcmf_btcoex_boost_wifi(cfg->btcoex, false); - brcmf_btcoex_restore_part1(cfg->btcoex); - - kfree(cfg->btcoex); - cfg->btcoex = NULL; -} - -static void brcmf_btcoex_dhcp_start(struct brcmf_btcoex_info *btci) -{ - struct brcmf_if *ifp = btci->vif->ifp; - - btcmf_btcoex_save_part1(btci); - /* set new regs values */ - brcmf_btcoex_params_write(ifp, 66, BRCMF_BT_DHCP_REG66); - brcmf_btcoex_params_write(ifp, 41, BRCMF_BT_DHCP_REG41); - brcmf_btcoex_params_write(ifp, 68, BRCMF_BT_DHCP_REG68); - btci->dhcp_done = false; - btci->bt_state = BRCMF_BT_DHCP_START; - schedule_work(&btci->work); - brcmf_dbg(TRACE, "enable BT DHCP Timer\n"); -} - -static void brcmf_btcoex_dhcp_end(struct brcmf_btcoex_info *btci) -{ - /* Stop any bt timer because DHCP session is done */ - btci->dhcp_done = true; - if (btci->timer_on) { - brcmf_dbg(INFO, "disable BT DHCP Timer\n"); - btci->timer_on = false; - del_timer_sync(&btci->timer); - - /* schedule worker if transition to IDLE is needed */ - if (btci->bt_state != BRCMF_BT_DHCP_IDLE) { - brcmf_dbg(INFO, "bt_state:%d\n", - btci->bt_state); - schedule_work(&btci->work); - } - } else { - /* Restore original values */ - brcmf_btcoex_restore_part1(btci); - } -} - -/** - * brcmf_btcoex_set_mode - set BT coex mode - * @cfg: driver private cfg80211 data - * @mode: Wifi-Bluetooth coexistence mode - * - * return: 0 on success - */ -int brcmf_btcoex_set_mode(struct brcmf_cfg80211_vif *vif, - enum brcmf_btcoex_mode mode, u16 duration) -{ - struct brcmf_cfg80211_info *cfg = wiphy_priv(vif->wdev.wiphy); - struct brcmf_btcoex_info *btci = cfg->btcoex; - struct brcmf_if *ifp = brcmf_get_ifp(cfg->pub, 0); - - switch (mode) { - case BRCMF_BTCOEX_DISABLED: - brcmf_dbg(INFO, "DHCP session starts\n"); - if (btci->bt_state != BRCMF_BT_DHCP_IDLE) - return -EBUSY; - /* Start BT timer only for SCO connection */ - if (brcmf_btcoex_is_sco_active(ifp)) { - btci->timeout = duration; - btci->vif = vif; - brcmf_btcoex_dhcp_start(btci); - } - break; - - case BRCMF_BTCOEX_ENABLED: - brcmf_dbg(INFO, "DHCP session ends\n"); - if (btci->bt_state != BRCMF_BT_DHCP_IDLE && - vif == btci->vif) { - brcmf_btcoex_dhcp_end(btci); - } - break; - default: - brcmf_dbg(INFO, "Unknown mode, ignored\n"); - } - return 0; -} |