// SPDX-License-Identifier: BSD-3-Clause-Clear
/* Copyright (C) 2023 MediaTek Inc. */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb.h>

#include "mt7925.h"
#include "mcu.h"
#include "mac.h"

static const struct usb_device_id mt7925u_device_table[] = {
        { USB_DEVICE_AND_INTERFACE_INFO(0x0e8d, 0x7925, 0xff, 0xff, 0xff),
                .driver_info = (kernel_ulong_t)MT7925_FIRMWARE_WM },
        /* Netgear, Inc. A9000 */
        { USB_DEVICE_AND_INTERFACE_INFO(0x0846, 0x9072, 0xff, 0xff, 0xff),
                .driver_info = (kernel_ulong_t)MT7925_FIRMWARE_WM },
        { },
};

static int
mt7925u_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
                         int cmd, int *seq)
{
        struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
        u32 pad, ep;
        int ret;

        ret = mt7925_mcu_fill_message(mdev, skb, cmd, seq);
        if (ret)
                return ret;

        mdev->mcu.timeout = 3 * HZ;

        if (cmd != MCU_CMD(FW_SCATTER))
                ep = MT_EP_OUT_INBAND_CMD;
        else
                ep = MT_EP_OUT_AC_BE;

        mt792x_skb_add_usb_sdio_hdr(dev, skb, 0);
        pad = round_up(skb->len, 4) + 4 - skb->len;
        __skb_put_zero(skb, pad);

        ret = mt76u_bulk_msg(&dev->mt76, skb->data, skb->len, NULL,
                             1000, ep);
        dev_kfree_skb(skb);

        return ret;
}

static int mt7925u_mcu_init(struct mt792x_dev *dev)
{
        static const struct mt76_mcu_ops mcu_ops = {
                .headroom = MT_SDIO_HDR_SIZE +
                            sizeof(struct mt76_connac2_mcu_txd),
                .tailroom = MT_USB_TAIL_SIZE,
                .mcu_skb_send_msg = mt7925u_mcu_send_message,
                .mcu_parse_response = mt7925_mcu_parse_response,
        };
        int ret;

        dev->mt76.mcu_ops = &mcu_ops;

        mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
        ret = mt7925_run_firmware(dev);
        if (ret)
                return ret;

        set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
        mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);

        return 0;
}

static int mt7925u_mac_reset(struct mt792x_dev *dev)
{
        int err;

        mt76_txq_schedule_all(&dev->mphy);
        mt76_worker_disable(&dev->mt76.tx_worker);

        set_bit(MT76_RESET, &dev->mphy.state);
        set_bit(MT76_MCU_RESET, &dev->mphy.state);

        wake_up(&dev->mt76.mcu.wait);
        skb_queue_purge(&dev->mt76.mcu.res_q);

        mt76u_stop_rx(&dev->mt76);
        mt76u_stop_tx(&dev->mt76);

        mt792xu_wfsys_reset(dev);

        clear_bit(MT76_MCU_RESET, &dev->mphy.state);
        err = mt76u_resume_rx(&dev->mt76);
        if (err)
                goto out;

        err = mt792xu_mcu_power_on(dev);
        if (err)
                goto out;

        err = mt792xu_dma_init(dev, false);
        if (err)
                goto out;

        mt76_wr(dev, MT_SWDEF_MODE, MT_SWDEF_NORMAL_MODE);
        mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);

        err = mt7925_run_firmware(dev);
        if (err)
                goto out;

        mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);

        err = mt7925_mcu_set_eeprom(dev);
        if (err)
                goto out;

        err = mt7925_mac_init(dev);
        if (err)
                goto out;

        err = __mt7925_start(&dev->phy);
out:
        clear_bit(MT76_RESET, &dev->mphy.state);

        mt76_worker_enable(&dev->mt76.tx_worker);

        return err;
}

static int mt7925u_probe(struct usb_interface *usb_intf,
                         const struct usb_device_id *id)
{
        static const struct mt76_driver_ops drv_ops = {
                .txwi_size = MT_SDIO_TXD_SIZE,
                .drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ |
                             MT_DRV_AMSDU_OFFLOAD,
                .survey_flags = SURVEY_INFO_TIME_TX |
                                SURVEY_INFO_TIME_RX |
                                SURVEY_INFO_TIME_BSS_RX,
                .tx_prepare_skb = mt7925_usb_sdio_tx_prepare_skb,
                .tx_complete_skb = mt7925_usb_sdio_tx_complete_skb,
                .tx_status_data = mt7925_usb_sdio_tx_status_data,
                .rx_skb = mt7925_queue_rx_skb,
                .rx_check = mt7925_rx_check,
                .sta_add = mt7925_mac_sta_add,
                .sta_event = mt7925_mac_sta_event,
                .sta_remove = mt7925_mac_sta_remove,
                .update_survey = mt792x_update_channel,
        };
        static const struct mt792x_hif_ops hif_ops = {
                .mcu_init = mt7925u_mcu_init,
                .init_reset = mt792xu_init_reset,
                .reset = mt7925u_mac_reset,
        };
        static struct mt76_bus_ops bus_ops = {
                .rr = mt792xu_rr,
                .wr = mt792xu_wr,
                .rmw = mt792xu_rmw,
                .read_copy = mt76u_read_copy,
                .write_copy = mt792xu_copy,
                .type = MT76_BUS_USB,
        };
        struct usb_device *udev = interface_to_usbdev(usb_intf);
        struct ieee80211_ops *ops;
        struct ieee80211_hw *hw;
        struct mt792x_dev *dev;
        struct mt76_dev *mdev;
        u8 features;
        int ret;

        ops = mt792x_get_mac80211_ops(&usb_intf->dev, &mt7925_ops,
                                      (void *)id->driver_info, &features);
        if (!ops)
                return -ENOMEM;

        ops->stop = mt792xu_stop;

        mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
        if (!mdev)
                return -ENOMEM;

        dev = container_of(mdev, struct mt792x_dev, mt76);
        dev->fw_features = features;
        dev->hif_ops = &hif_ops;

        udev = usb_get_dev(udev);
        usb_reset_device(udev);

        usb_set_intfdata(usb_intf, dev);

        ret = __mt76u_init(mdev, usb_intf, &bus_ops);
        if (ret < 0)
                goto error;

        mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
                    (mt76_rr(dev, MT_HW_REV) & 0xff);
        dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);

        if (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {
                ret = mt792xu_wfsys_reset(dev);
                if (ret)
                        goto error;
        }

        ret = mt792xu_mcu_power_on(dev);
        if (ret)
                goto error;

        ret = mt76u_alloc_mcu_queue(&dev->mt76);
        if (ret)
                goto error;

        ret = mt76u_alloc_queues(&dev->mt76);
        if (ret)
                goto error;

        ret = mt792xu_dma_init(dev, false);
        if (ret)
                goto error;

        hw = mt76_hw(dev);
        /* check hw sg support in order to enable AMSDU */
        hw->max_tx_fragments = mdev->usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;

        ret = mt7925_register_device(dev);
        if (ret)
                goto error;

        return 0;

error:
        mt76u_queues_deinit(&dev->mt76);

        usb_set_intfdata(usb_intf, NULL);
        usb_put_dev(interface_to_usbdev(usb_intf));

        mt76_free_device(&dev->mt76);

        return ret;
}

#ifdef CONFIG_PM
static int mt7925u_suspend(struct usb_interface *intf, pm_message_t state)
{
        struct mt792x_dev *dev = usb_get_intfdata(intf);
        struct mt76_connac_pm *pm = &dev->pm;
        int err, ret;

        pm->suspended = true;
        dev->hif_resumed = false;
        flush_work(&dev->reset_work);

        mt76_connac_mcu_set_hif_suspend(&dev->mt76, true, false);
        ret = wait_event_timeout(dev->wait,
                                 dev->hif_idle, 3 * HZ);
        if (!ret) {
                err = -ETIMEDOUT;
                goto failed;
        }

        mt76u_stop_rx(&dev->mt76);
        mt76u_stop_tx(&dev->mt76);

        return 0;

failed:
        pm->suspended = false;

        if (err < 0)
                mt792x_reset(&dev->mt76);

        return err;
}

static int mt7925u_resume(struct usb_interface *intf)
{
        struct mt792x_dev *dev = usb_get_intfdata(intf);
        struct mt76_connac_pm *pm = &dev->pm;
        bool reinit = true;
        int err, i, ret;

        dev->hif_idle = false;
        for (i = 0; i < 10; i++) {
                u32 val = mt76_rr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT);

                if (!(val & MT_WF_SW_SER_TRIGGER_SUSPEND)) {
                        reinit = false;
                        break;
                }
                if (val & MT_WF_SW_SER_DONE_SUSPEND) {
                        mt76_wr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT, 0);
                        break;
                }

                msleep(20);
        }

        if (reinit || mt792x_dma_need_reinit(dev)) {
                err = mt792xu_dma_init(dev, true);
                if (err)
                        goto failed;
        }

        err = mt76u_resume_rx(&dev->mt76);
        if (err < 0)
                goto failed;

        mt76_connac_mcu_set_hif_suspend(&dev->mt76, false, false);
        ret = wait_event_timeout(dev->wait,
                                 dev->hif_resumed, 3 * HZ);
        if (!ret)
                err = -ETIMEDOUT;
failed:
        pm->suspended = false;

        if (err < 0)
                mt792x_reset(&dev->mt76);

        return err;
}
#endif /* CONFIG_PM */

MODULE_DEVICE_TABLE(usb, mt7925u_device_table);
MODULE_FIRMWARE(MT7925_FIRMWARE_WM);
MODULE_FIRMWARE(MT7925_ROM_PATCH);

static struct usb_driver mt7925u_driver = {
        .name           = KBUILD_MODNAME,
        .id_table       = mt7925u_device_table,
        .probe          = mt7925u_probe,
        .disconnect     = mt792xu_disconnect,
#ifdef CONFIG_PM
        .suspend        = mt7925u_suspend,
        .resume         = mt7925u_resume,
        .reset_resume   = mt7925u_resume,
#endif /* CONFIG_PM */
        .soft_unbind    = 1,
        .disable_hub_initiated_lpm = 1,
};
module_usb_driver(mt7925u_driver);

MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
MODULE_DESCRIPTION("MediaTek MT7925U (USB) wireless driver");
MODULE_LICENSE("Dual BSD/GPL");