1 // SPDX-License-Identifier: ISC 2 /* Copyright (C) 2021 MediaTek Inc. */ 3 4 #include <linux/iopoll.h> 5 #include <linux/mmc/sdio_func.h> 6 #include "mt7921.h" 7 #include "mac.h" 8 #include "../sdio.h" 9 10 static void mt7921s_enable_irq(struct mt76_dev *dev) 11 { 12 struct mt76_sdio *sdio = &dev->sdio; 13 14 sdio_claim_host(sdio->func); 15 sdio_writel(sdio->func, WHLPCR_INT_EN_SET, MCR_WHLPCR, NULL); 16 sdio_release_host(sdio->func); 17 } 18 19 static void mt7921s_disable_irq(struct mt76_dev *dev) 20 { 21 struct mt76_sdio *sdio = &dev->sdio; 22 23 sdio_claim_host(sdio->func); 24 sdio_writel(sdio->func, WHLPCR_INT_EN_CLR, MCR_WHLPCR, NULL); 25 sdio_release_host(sdio->func); 26 } 27 28 static u32 mt7921s_read_whcr(struct mt76_dev *dev) 29 { 30 return sdio_readl(dev->sdio.func, MCR_WHCR, NULL); 31 } 32 33 int mt7921s_wfsys_reset(struct mt7921_dev *dev) 34 { 35 struct mt76_sdio *sdio = &dev->mt76.sdio; 36 u32 val, status; 37 38 mt7921s_mcu_drv_pmctrl(dev); 39 40 sdio_claim_host(sdio->func); 41 42 val = sdio_readl(sdio->func, MCR_WHCR, NULL); 43 val &= ~WF_WHOLE_PATH_RSTB; 44 sdio_writel(sdio->func, val, MCR_WHCR, NULL); 45 46 msleep(50); 47 48 val = sdio_readl(sdio->func, MCR_WHCR, NULL); 49 val &= ~WF_SDIO_WF_PATH_RSTB; 50 sdio_writel(sdio->func, val, MCR_WHCR, NULL); 51 52 usleep_range(1000, 2000); 53 54 val = sdio_readl(sdio->func, MCR_WHCR, NULL); 55 val |= WF_WHOLE_PATH_RSTB; 56 sdio_writel(sdio->func, val, MCR_WHCR, NULL); 57 58 readx_poll_timeout(mt7921s_read_whcr, &dev->mt76, status, 59 status & WF_RST_DONE, 50000, 2000000); 60 61 sdio_release_host(sdio->func); 62 63 clear_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state); 64 65 /* activate mt7921s again */ 66 mt7921s_mcu_drv_pmctrl(dev); 67 mt76_clear(dev, MT_CONN_STATUS, MT_WIFI_PATCH_DL_STATE); 68 mt7921s_mcu_fw_pmctrl(dev); 69 mt7921s_mcu_drv_pmctrl(dev); 70 71 return 0; 72 } 73 74 int mt7921s_init_reset(struct mt7921_dev *dev) 75 { 76 set_bit(MT76_MCU_RESET, &dev->mphy.state); 77 78 wake_up(&dev->mt76.mcu.wait); 79 skb_queue_purge(&dev->mt76.mcu.res_q); 80 wait_event_timeout(dev->mt76.sdio.wait, 81 mt76s_txqs_empty(&dev->mt76), 5 * HZ); 82 mt76_worker_disable(&dev->mt76.sdio.txrx_worker); 83 84 mt7921s_disable_irq(&dev->mt76); 85 mt7921s_wfsys_reset(dev); 86 87 mt76_worker_enable(&dev->mt76.sdio.txrx_worker); 88 clear_bit(MT76_MCU_RESET, &dev->mphy.state); 89 mt7921s_enable_irq(&dev->mt76); 90 91 return 0; 92 } 93 94 int mt7921s_mac_reset(struct mt7921_dev *dev) 95 { 96 int err; 97 98 mt76_connac_free_pending_tx_skbs(&dev->pm, NULL); 99 mt76_txq_schedule_all(&dev->mphy); 100 mt76_worker_disable(&dev->mt76.tx_worker); 101 set_bit(MT76_RESET, &dev->mphy.state); 102 set_bit(MT76_MCU_RESET, &dev->mphy.state); 103 wake_up(&dev->mt76.mcu.wait); 104 skb_queue_purge(&dev->mt76.mcu.res_q); 105 wait_event_timeout(dev->mt76.sdio.wait, 106 mt76s_txqs_empty(&dev->mt76), 5 * HZ); 107 mt76_worker_disable(&dev->mt76.sdio.txrx_worker); 108 mt76_worker_disable(&dev->mt76.sdio.status_worker); 109 mt76_worker_disable(&dev->mt76.sdio.net_worker); 110 cancel_work_sync(&dev->mt76.sdio.stat_work); 111 112 mt7921s_disable_irq(&dev->mt76); 113 mt7921s_wfsys_reset(dev); 114 115 mt76_worker_enable(&dev->mt76.sdio.txrx_worker); 116 mt76_worker_enable(&dev->mt76.sdio.status_worker); 117 mt76_worker_enable(&dev->mt76.sdio.net_worker); 118 119 dev->fw_assert = false; 120 clear_bit(MT76_MCU_RESET, &dev->mphy.state); 121 mt7921s_enable_irq(&dev->mt76); 122 123 err = mt7921_run_firmware(dev); 124 if (err) 125 goto out; 126 127 err = mt7921_mcu_set_eeprom(dev); 128 if (err) 129 goto out; 130 131 err = mt7921_mac_init(dev); 132 if (err) 133 goto out; 134 135 err = __mt7921_start(&dev->phy); 136 out: 137 clear_bit(MT76_RESET, &dev->mphy.state); 138 139 mt76_worker_enable(&dev->mt76.tx_worker); 140 141 return err; 142 } 143 144 static void 145 mt7921s_write_txwi(struct mt7921_dev *dev, struct mt76_wcid *wcid, 146 enum mt76_txq_id qid, struct ieee80211_sta *sta, 147 struct ieee80211_key_conf *key, int pid, 148 struct sk_buff *skb) 149 { 150 __le32 *txwi = (__le32 *)(skb->data - MT_SDIO_TXD_SIZE); 151 152 memset(txwi, 0, MT_SDIO_TXD_SIZE); 153 mt7921_mac_write_txwi(dev, txwi, skb, wcid, key, pid, false); 154 skb_push(skb, MT_SDIO_TXD_SIZE); 155 } 156 157 int mt7921s_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr, 158 enum mt76_txq_id qid, struct mt76_wcid *wcid, 159 struct ieee80211_sta *sta, 160 struct mt76_tx_info *tx_info) 161 { 162 struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); 163 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb); 164 struct ieee80211_key_conf *key = info->control.hw_key; 165 struct sk_buff *skb = tx_info->skb; 166 int err, pad, pktid; 167 168 if (unlikely(tx_info->skb->len <= ETH_HLEN)) 169 return -EINVAL; 170 171 if (!wcid) 172 wcid = &dev->mt76.global_wcid; 173 174 if (sta) { 175 struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv; 176 177 if (time_after(jiffies, msta->last_txs + HZ / 4)) { 178 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 179 msta->last_txs = jiffies; 180 } 181 } 182 183 pktid = mt76_tx_status_skb_add(&dev->mt76, wcid, skb); 184 mt7921s_write_txwi(dev, wcid, qid, sta, key, pktid, skb); 185 186 mt7921_skb_add_usb_sdio_hdr(dev, skb, MT7921_SDIO_DATA); 187 pad = round_up(skb->len, 4) - skb->len; 188 189 err = mt76_skb_adjust_pad(skb, pad); 190 if (err) 191 /* Release pktid in case of error. */ 192 idr_remove(&wcid->pktid, pktid); 193 194 return err; 195 } 196 197 void mt7921s_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e) 198 { 199 __le32 *txwi = (__le32 *)(e->skb->data + MT_SDIO_HDR_SIZE); 200 unsigned int headroom = MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE; 201 struct ieee80211_sta *sta; 202 struct mt76_wcid *wcid; 203 u16 idx; 204 205 idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX); 206 wcid = rcu_dereference(mdev->wcid[idx]); 207 sta = wcid_to_sta(wcid); 208 209 if (sta && likely(e->skb->protocol != cpu_to_be16(ETH_P_PAE))) 210 mt7921_tx_check_aggr(sta, txwi); 211 212 skb_pull(e->skb, headroom); 213 mt76_tx_complete_skb(mdev, e->wcid, e->skb); 214 } 215 216 bool mt7921s_tx_status_data(struct mt76_dev *mdev, u8 *update) 217 { 218 struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); 219 220 mt7921_mutex_acquire(dev); 221 mt7921_mac_sta_poll(dev); 222 mt7921_mutex_release(dev); 223 224 return false; 225 } 226