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1// SPDX-License-Identifier: ISC2/* Copyright (C) 2021 MediaTek Inc. */3 4#include <linux/kernel.h>5#include <linux/mmc/sdio_func.h>6#include <linux/module.h>7#include <linux/iopoll.h>8 9#include "mt7921.h"10#include "../sdio.h"11#include "../mt76_connac2_mac.h"12#include "mcu.h"13#include "regs.h"14 15static int16mt7921s_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,17 int cmd, int *seq)18{19 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);20 enum mt7921_sdio_pkt_type type = MT7921_SDIO_CMD;21 enum mt76_mcuq_id txq = MT_MCUQ_WM;22 int ret, pad;23 24 /* We just return in case firmware assertion to avoid blocking the25 * common workqueue to run, for example, the coredump work might be26 * blocked by mt792x_mac_work that is excuting register access via sdio27 * bus.28 */29 if (dev->fw_assert)30 return -EBUSY;31 32 ret = mt76_connac2_mcu_fill_message(mdev, skb, cmd, seq);33 if (ret)34 return ret;35 36 mdev->mcu.timeout = 3 * HZ;37 38 if (cmd == MCU_CMD(FW_SCATTER))39 type = MT7921_SDIO_FWDL;40 41 mt792x_skb_add_usb_sdio_hdr(dev, skb, type);42 pad = round_up(skb->len, 4) - skb->len;43 __skb_put_zero(skb, pad);44 45 ret = mt76_tx_queue_skb_raw(dev, mdev->q_mcu[txq], skb, 0);46 if (ret)47 return ret;48 49 mt76_queue_kick(dev, mdev->q_mcu[txq]);50 51 return ret;52}53 54static u32 mt7921s_read_rm3r(struct mt792x_dev *dev)55{56 struct mt76_sdio *sdio = &dev->mt76.sdio;57 58 return sdio_readl(sdio->func, MCR_D2HRM3R, NULL);59}60 61static u32 mt7921s_clear_rm3r_drv_own(struct mt792x_dev *dev)62{63 struct mt76_sdio *sdio = &dev->mt76.sdio;64 u32 val;65 66 val = sdio_readl(sdio->func, MCR_D2HRM3R, NULL);67 if (val)68 sdio_writel(sdio->func, H2D_SW_INT_CLEAR_MAILBOX_ACK,69 MCR_WSICR, NULL);70 71 return val;72}73 74int mt7921s_mcu_init(struct mt792x_dev *dev)75{76 static const struct mt76_mcu_ops mt7921s_mcu_ops = {77 .headroom = MT_SDIO_HDR_SIZE +78 sizeof(struct mt76_connac2_mcu_txd),79 .tailroom = MT_SDIO_TAIL_SIZE,80 .mcu_skb_send_msg = mt7921s_mcu_send_message,81 .mcu_parse_response = mt7921_mcu_parse_response,82 .mcu_rr = mt76_connac_mcu_reg_rr,83 .mcu_wr = mt76_connac_mcu_reg_wr,84 };85 int ret;86 87 mt7921s_mcu_drv_pmctrl(dev);88 89 dev->mt76.mcu_ops = &mt7921s_mcu_ops;90 91 ret = mt7921_run_firmware(dev);92 if (ret)93 return ret;94 95 set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);96 97 return 0;98}99 100int mt7921s_mcu_drv_pmctrl(struct mt792x_dev *dev)101{102 struct sdio_func *func = dev->mt76.sdio.func;103 struct mt76_phy *mphy = &dev->mt76.phy;104 struct mt76_connac_pm *pm = &dev->pm;105 u32 status;106 int err;107 108 sdio_claim_host(func);109 110 sdio_writel(func, WHLPCR_FW_OWN_REQ_CLR, MCR_WHLPCR, NULL);111 112 err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status,113 status & WHLPCR_IS_DRIVER_OWN, 2000, 1000000);114 115 if (!err && test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state))116 err = readx_poll_timeout(mt7921s_read_rm3r, dev, status,117 status & D2HRM3R_IS_DRIVER_OWN,118 2000, 1000000);119 120 sdio_release_host(func);121 122 if (err < 0) {123 dev_err(dev->mt76.dev, "driver own failed\n");124 return -EIO;125 }126 127 clear_bit(MT76_STATE_PM, &mphy->state);128 129 pm->stats.last_wake_event = jiffies;130 pm->stats.doze_time += pm->stats.last_wake_event -131 pm->stats.last_doze_event;132 133 return 0;134}135 136int mt7921s_mcu_fw_pmctrl(struct mt792x_dev *dev)137{138 struct sdio_func *func = dev->mt76.sdio.func;139 struct mt76_phy *mphy = &dev->mt76.phy;140 struct mt76_connac_pm *pm = &dev->pm;141 u32 status;142 int err;143 144 sdio_claim_host(func);145 146 if (test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state)) {147 err = readx_poll_timeout(mt7921s_clear_rm3r_drv_own,148 dev, status,149 !(status & D2HRM3R_IS_DRIVER_OWN),150 2000, 1000000);151 if (err < 0) {152 dev_err(dev->mt76.dev, "mailbox ACK not cleared\n");153 goto out;154 }155 }156 157 sdio_writel(func, WHLPCR_FW_OWN_REQ_SET, MCR_WHLPCR, NULL);158 159 err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status,160 !(status & WHLPCR_IS_DRIVER_OWN), 2000, 1000000);161out:162 sdio_release_host(func);163 164 if (err < 0) {165 dev_err(dev->mt76.dev, "firmware own failed\n");166 clear_bit(MT76_STATE_PM, &mphy->state);167 return -EIO;168 }169 170 pm->stats.last_doze_event = jiffies;171 pm->stats.awake_time += pm->stats.last_doze_event -172 pm->stats.last_wake_event;173 174 return 0;175}176