diff options
Diffstat (limited to 'drivers/net/wireless/realtek/rtw88/util.c')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/util.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/util.c b/drivers/net/wireless/realtek/rtw88/util.c new file mode 100644 index 0000000000..e222d3c01a --- /dev/null +++ b/drivers/net/wireless/realtek/rtw88/util.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* Copyright(c) 2018-2019 Realtek Corporation + */ + +#include "main.h" +#include "util.h" +#include "reg.h" + +bool check_hw_ready(struct rtw_dev *rtwdev, u32 addr, u32 mask, u32 target) +{ + u32 cnt; + + for (cnt = 0; cnt < 1000; cnt++) { + if (rtw_read32_mask(rtwdev, addr, mask) == target) + return true; + + udelay(10); + } + + return false; +} +EXPORT_SYMBOL(check_hw_ready); + +bool ltecoex_read_reg(struct rtw_dev *rtwdev, u16 offset, u32 *val) +{ + const struct rtw_chip_info *chip = rtwdev->chip; + const struct rtw_ltecoex_addr *ltecoex = chip->ltecoex_addr; + + if (!check_hw_ready(rtwdev, ltecoex->ctrl, LTECOEX_READY, 1)) + return false; + + rtw_write32(rtwdev, ltecoex->ctrl, 0x800F0000 | offset); + *val = rtw_read32(rtwdev, ltecoex->rdata); + + return true; +} + +bool ltecoex_reg_write(struct rtw_dev *rtwdev, u16 offset, u32 value) +{ + const struct rtw_chip_info *chip = rtwdev->chip; + const struct rtw_ltecoex_addr *ltecoex = chip->ltecoex_addr; + + if (!check_hw_ready(rtwdev, ltecoex->ctrl, LTECOEX_READY, 1)) + return false; + + rtw_write32(rtwdev, ltecoex->wdata, value); + rtw_write32(rtwdev, ltecoex->ctrl, 0xC00F0000 | offset); + + return true; +} + +void rtw_restore_reg(struct rtw_dev *rtwdev, + struct rtw_backup_info *bckp, u32 num) +{ + u8 len; + u32 reg; + u32 val; + int i; + + for (i = 0; i < num; i++, bckp++) { + len = bckp->len; + reg = bckp->reg; + val = bckp->val; + + switch (len) { + case 1: + rtw_write8(rtwdev, reg, (u8)val); + break; + case 2: + rtw_write16(rtwdev, reg, (u16)val); + break; + case 4: + rtw_write32(rtwdev, reg, (u32)val); + break; + default: + break; + } + } +} +EXPORT_SYMBOL(rtw_restore_reg); + +void rtw_desc_to_mcsrate(u16 rate, u8 *mcs, u8 *nss) +{ + if (rate <= DESC_RATE54M) + return; + + if (rate >= DESC_RATEVHT1SS_MCS0 && + rate <= DESC_RATEVHT1SS_MCS9) { + *nss = 1; + *mcs = rate - DESC_RATEVHT1SS_MCS0; + } else if (rate >= DESC_RATEVHT2SS_MCS0 && + rate <= DESC_RATEVHT2SS_MCS9) { + *nss = 2; + *mcs = rate - DESC_RATEVHT2SS_MCS0; + } else if (rate >= DESC_RATEVHT3SS_MCS0 && + rate <= DESC_RATEVHT3SS_MCS9) { + *nss = 3; + *mcs = rate - DESC_RATEVHT3SS_MCS0; + } else if (rate >= DESC_RATEVHT4SS_MCS0 && + rate <= DESC_RATEVHT4SS_MCS9) { + *nss = 4; + *mcs = rate - DESC_RATEVHT4SS_MCS0; + } else if (rate >= DESC_RATEMCS0 && + rate <= DESC_RATEMCS15) { + *mcs = rate - DESC_RATEMCS0; + } +} + +struct rtw_stas_entry { + struct list_head list; + struct ieee80211_sta *sta; +}; + +struct rtw_iter_stas_data { + struct rtw_dev *rtwdev; + struct list_head list; +}; + +static void rtw_collect_sta_iter(void *data, struct ieee80211_sta *sta) +{ + struct rtw_iter_stas_data *iter_stas = data; + struct rtw_stas_entry *stas_entry; + + stas_entry = kmalloc(sizeof(*stas_entry), GFP_ATOMIC); + if (!stas_entry) + return; + + stas_entry->sta = sta; + list_add_tail(&stas_entry->list, &iter_stas->list); +} + +void rtw_iterate_stas(struct rtw_dev *rtwdev, + void (*iterator)(void *data, + struct ieee80211_sta *sta), + void *data) +{ + struct rtw_iter_stas_data iter_data; + struct rtw_stas_entry *sta_entry, *tmp; + + /* &rtwdev->mutex makes sure no stations can be removed between + * collecting the stations and iterating over them. + */ + lockdep_assert_held(&rtwdev->mutex); + + iter_data.rtwdev = rtwdev; + INIT_LIST_HEAD(&iter_data.list); + + ieee80211_iterate_stations_atomic(rtwdev->hw, rtw_collect_sta_iter, + &iter_data); + + list_for_each_entry_safe(sta_entry, tmp, &iter_data.list, + list) { + list_del_init(&sta_entry->list); + iterator(data, sta_entry->sta); + kfree(sta_entry); + } +} + +struct rtw_vifs_entry { + struct list_head list; + struct ieee80211_vif *vif; +}; + +struct rtw_iter_vifs_data { + struct rtw_dev *rtwdev; + struct list_head list; +}; + +static void rtw_collect_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) +{ + struct rtw_iter_vifs_data *iter_stas = data; + struct rtw_vifs_entry *vifs_entry; + + vifs_entry = kmalloc(sizeof(*vifs_entry), GFP_ATOMIC); + if (!vifs_entry) + return; + + vifs_entry->vif = vif; + list_add_tail(&vifs_entry->list, &iter_stas->list); +} + +void rtw_iterate_vifs(struct rtw_dev *rtwdev, + void (*iterator)(void *data, struct ieee80211_vif *vif), + void *data) +{ + struct rtw_iter_vifs_data iter_data; + struct rtw_vifs_entry *vif_entry, *tmp; + + /* &rtwdev->mutex makes sure no interfaces can be removed between + * collecting the interfaces and iterating over them. + */ + lockdep_assert_held(&rtwdev->mutex); + + iter_data.rtwdev = rtwdev; + INIT_LIST_HEAD(&iter_data.list); + + ieee80211_iterate_active_interfaces_atomic(rtwdev->hw, + IEEE80211_IFACE_ITER_NORMAL, + rtw_collect_vif_iter, &iter_data); + + list_for_each_entry_safe(vif_entry, tmp, &iter_data.list, + list) { + list_del_init(&vif_entry->list); + iterator(data, vif_entry->vif); + kfree(vif_entry); + } +} |