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// SPDX-License-Identifier: ISC
/* Copyright (C) 2021 MediaTek Inc. */
#include <linux/iopoll.h>
#include <linux/mmc/sdio_func.h>
#include "mt7921.h"
#include "../mt76_connac2_mac.h"
#include "../sdio.h"
#include <linux/mmc/host.h>
#include <linux/kallsyms.h>
static void mt7921s_enable_irq(struct mt76_dev *dev)
{
struct mt76_sdio *sdio = &dev->sdio;
sdio_claim_host(sdio->func);
sdio_writel(sdio->func, WHLPCR_INT_EN_SET, MCR_WHLPCR, NULL);
sdio_release_host(sdio->func);
}
static void mt7921s_disable_irq(struct mt76_dev *dev)
{
struct mt76_sdio *sdio = &dev->sdio;
sdio_claim_host(sdio->func);
sdio_writel(sdio->func, WHLPCR_INT_EN_CLR, MCR_WHLPCR, NULL);
sdio_release_host(sdio->func);
}
static u32 mt7921s_read_whcr(struct mt76_dev *dev)
{
return sdio_readl(dev->sdio.func, MCR_WHCR, NULL);
}
int mt7921s_wfsys_reset(struct mt792x_dev *dev)
{
struct mt76_sdio *sdio = &dev->mt76.sdio;
u32 val, status;
if (atomic_read(&dev->mt76.bus_hung))
return 0;
mt7921s_mcu_drv_pmctrl(dev);
sdio_claim_host(sdio->func);
val = sdio_readl(sdio->func, MCR_WHCR, NULL);
val &= ~WF_WHOLE_PATH_RSTB;
sdio_writel(sdio->func, val, MCR_WHCR, NULL);
msleep(50);
val = sdio_readl(sdio->func, MCR_WHCR, NULL);
val &= ~WF_SDIO_WF_PATH_RSTB;
sdio_writel(sdio->func, val, MCR_WHCR, NULL);
usleep_range(1000, 2000);
val = sdio_readl(sdio->func, MCR_WHCR, NULL);
val |= WF_WHOLE_PATH_RSTB;
sdio_writel(sdio->func, val, MCR_WHCR, NULL);
readx_poll_timeout(mt7921s_read_whcr, &dev->mt76, status,
status & WF_RST_DONE, 50000, 2000000);
sdio_release_host(sdio->func);
clear_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
/* activate mt7921s again */
mt7921s_mcu_drv_pmctrl(dev);
mt76_clear(dev, MT_CONN_STATUS, MT_WIFI_PATCH_DL_STATE);
mt7921s_mcu_fw_pmctrl(dev);
mt7921s_mcu_drv_pmctrl(dev);
return 0;
}
int mt7921s_init_reset(struct mt792x_dev *dev)
{
set_bit(MT76_MCU_RESET, &dev->mphy.state);
wake_up(&dev->mt76.mcu.wait);
skb_queue_purge(&dev->mt76.mcu.res_q);
wait_event_timeout(dev->mt76.sdio.wait,
mt76s_txqs_empty(&dev->mt76), 5 * HZ);
mt76_worker_disable(&dev->mt76.sdio.txrx_worker);
mt7921s_disable_irq(&dev->mt76);
mt7921s_wfsys_reset(dev);
mt76_worker_enable(&dev->mt76.sdio.txrx_worker);
clear_bit(MT76_MCU_RESET, &dev->mphy.state);
mt7921s_enable_irq(&dev->mt76);
return 0;
}
static struct mt76_sdio *msdio;
static void mt7921s_card_reset(struct work_struct *work)
{
struct mmc_host *sdio_host = msdio->func->card->host;
sdio_claim_host(msdio->func);
sdio_release_irq(msdio->func);
sdio_release_host(msdio->func);
mmc_remove_host(sdio_host);
msleep(50);
mmc_add_host(sdio_host);
}
static DECLARE_WORK(sdio_reset_work, mt7921s_card_reset);
static int mt7921s_check_bus(struct mt76_dev *dev)
{
struct mt76_sdio *sdio = &dev->sdio;
int err;
sdio_claim_host(sdio->func);
sdio_readl(dev->sdio.func, MCR_WHCR, &err);
sdio_release_host(sdio->func);
return err;
}
static int mt7921s_host_reset(struct mt792x_dev *dev)
{
struct mt76_dev *mdev = &dev->mt76;
int err = -1;
if (!atomic_read(&mdev->bus_hung))
err = mt7921s_check_bus(&dev->mt76);
if (err) {
atomic_set(&mdev->bus_hung, true);
msdio = &dev->mt76.sdio;
dev_err(mdev->dev, "SDIO bus problem detected(%d), resetting card!!\n", err);
schedule_work(&sdio_reset_work);
return err;
}
atomic_set(&mdev->bus_hung, false);
return 0;
}
int mt7921s_mac_reset(struct mt792x_dev *dev)
{
int err;
mt76_connac_free_pending_tx_skbs(&dev->pm, NULL);
mt7921s_host_reset(dev);
if (atomic_read(&dev->mt76.bus_hung))
return 0;
mt76_txq_schedule_all(&dev->mphy);
mt76_worker_disable(&dev->mt76.tx_worker);
set_bit(MT76_MCU_RESET, &dev->mphy.state);
wake_up(&dev->mt76.mcu.wait);
skb_queue_purge(&dev->mt76.mcu.res_q);
wait_event_timeout(dev->mt76.sdio.wait,
mt76s_txqs_empty(&dev->mt76), 5 * HZ);
mt76_worker_disable(&dev->mt76.sdio.txrx_worker);
mt76_worker_disable(&dev->mt76.sdio.status_worker);
mt76_worker_disable(&dev->mt76.sdio.net_worker);
mt76_worker_disable(&dev->mt76.sdio.stat_worker);
mt7921s_disable_irq(&dev->mt76);
mt7921s_wfsys_reset(dev);
mt76_worker_enable(&dev->mt76.sdio.txrx_worker);
mt76_worker_enable(&dev->mt76.sdio.status_worker);
mt76_worker_enable(&dev->mt76.sdio.net_worker);
mt76_worker_enable(&dev->mt76.sdio.stat_worker);
dev->fw_assert = false;
clear_bit(MT76_MCU_RESET, &dev->mphy.state);
mt7921s_enable_irq(&dev->mt76);
err = mt7921_run_firmware(dev);
if (err)
goto out;
err = mt7921_mcu_set_eeprom(dev);
if (err)
goto out;
err = mt7921_mac_init(dev);
if (err)
goto out;
err = __mt7921_start(&dev->phy);
out:
mt76_worker_enable(&dev->mt76.tx_worker);
return err;
}
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