// SPDX-License-Identifier: GPL-2.0-or-later
/* MHI MBIM Network driver - Network/MBIM over MHI bus
 *
 * Copyright (C) 2021 Linaro Ltd <loic.poulain@linaro.org>
 *
 * This driver copy some code from cdc_ncm, which is:
 * Copyright (C) ST-Ericsson 2010-2012
 * and cdc_mbim, which is:
 * Copyright (c) 2012  Smith Micro Software, Inc.
 * Copyright (c) 2012  Bjørn Mork <bjorn@mork.no>
 *
 */

#include <linux/ethtool.h>
#include <linux/if_arp.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/mhi.h>
#include <linux/mii.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/u64_stats_sync.h>
#include <linux/usb.h>
#include <linux/usb/cdc.h>
#include <linux/usb/usbnet.h>
#include <linux/usb/cdc_ncm.h>
#include <linux/wwan.h>

/* 3500 allows to optimize skb allocation, the skbs will basically fit in
 * one 4K page. Large MBIM packets will simply be split over several MHI
 * transfers and chained by the MHI net layer (zerocopy).
 */
#define MHI_DEFAULT_MRU 3500

#define MHI_MBIM_DEFAULT_MTU 1500
#define MHI_MAX_BUF_SZ 0xffff

#define MBIM_NDP16_SIGN_MASK 0x00ffffff

#define MHI_MBIM_LINK_HASH_SIZE 8
#define LINK_HASH(session) ((session) % MHI_MBIM_LINK_HASH_SIZE)

#define WDS_BIND_MUX_DATA_PORT_MUX_ID 112

struct mhi_mbim_link {
        struct mhi_mbim_context *mbim;
        struct net_device *ndev;
        unsigned int session;

        /* stats */
        u64_stats_t rx_packets;
        u64_stats_t rx_bytes;
        u64_stats_t rx_errors;
        u64_stats_t tx_packets;
        u64_stats_t tx_bytes;
        u64_stats_t tx_errors;
        u64_stats_t tx_dropped;
        struct u64_stats_sync tx_syncp;
        struct u64_stats_sync rx_syncp;

        struct hlist_node hlnode;
};

struct mhi_mbim_context {
        struct mhi_device *mdev;
        struct sk_buff *skbagg_head;
        struct sk_buff *skbagg_tail;
        unsigned int mru;
        u32 rx_queue_sz;
        u16 rx_seq;
        u16 tx_seq;
        struct delayed_work rx_refill;
        spinlock_t tx_lock;
        struct hlist_head link_list[MHI_MBIM_LINK_HASH_SIZE];
};

struct mbim_tx_hdr {
        struct usb_cdc_ncm_nth16 nth16;
        struct usb_cdc_ncm_ndp16 ndp16;
        struct usb_cdc_ncm_dpe16 dpe16[2];
} __packed;

static struct mhi_mbim_link *mhi_mbim_get_link_rcu(struct mhi_mbim_context *mbim,
                                                   unsigned int session)
{
        struct mhi_mbim_link *link;

        hlist_for_each_entry_rcu(link, &mbim->link_list[LINK_HASH(session)], hlnode) {
                if (link->session == session)
                        return link;
        }

        return NULL;
}

static int mhi_mbim_get_link_mux_id(struct mhi_controller *cntrl)
{
        if (strcmp(cntrl->name, "foxconn-dw5934e") == 0 ||
            strcmp(cntrl->name, "foxconn-t99w640") == 0 ||
            strcmp(cntrl->name, "foxconn-t99w760") == 0)
                return WDS_BIND_MUX_DATA_PORT_MUX_ID;

        return 0;
}

static struct sk_buff *mbim_tx_fixup(struct sk_buff *skb, unsigned int session,
                                     u16 tx_seq)
{
        unsigned int dgram_size = skb->len;
        struct usb_cdc_ncm_nth16 *nth16;
        struct usb_cdc_ncm_ndp16 *ndp16;
        struct mbim_tx_hdr *mbim_hdr;

        /* Only one NDP is sent, containing the IP packet (no aggregation) */

        /* Ensure we have enough headroom for crafting MBIM header */
        if (skb_cow_head(skb, sizeof(struct mbim_tx_hdr))) {
                dev_kfree_skb_any(skb);
                return NULL;
        }

        mbim_hdr = skb_push(skb, sizeof(struct mbim_tx_hdr));

        /* Fill NTB header */
        nth16 = &mbim_hdr->nth16;
        nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
        nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
        nth16->wSequence = cpu_to_le16(tx_seq);
        nth16->wBlockLength = cpu_to_le16(skb->len);
        nth16->wNdpIndex = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));

        /* Fill the unique NDP */
        ndp16 = &mbim_hdr->ndp16;
        ndp16->dwSignature = cpu_to_le32(USB_CDC_MBIM_NDP16_IPS_SIGN | (session << 24));
        ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16)
                                        + sizeof(struct usb_cdc_ncm_dpe16) * 2);
        ndp16->wNextNdpIndex = 0;

        /* Datagram follows the mbim header */
        ndp16->dpe16[0].wDatagramIndex = cpu_to_le16(sizeof(struct mbim_tx_hdr));
        ndp16->dpe16[0].wDatagramLength = cpu_to_le16(dgram_size);

        /* null termination */
        ndp16->dpe16[1].wDatagramIndex = 0;
        ndp16->dpe16[1].wDatagramLength = 0;

        return skb;
}

static netdev_tx_t mhi_mbim_ndo_xmit(struct sk_buff *skb, struct net_device *ndev)
{
        struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);
        struct mhi_mbim_context *mbim = link->mbim;
        unsigned long flags;
        int err = -ENOMEM;

        /* Serialize MHI channel queuing and MBIM seq */
        spin_lock_irqsave(&mbim->tx_lock, flags);

        skb = mbim_tx_fixup(skb, link->session, mbim->tx_seq);
        if (unlikely(!skb))
                goto exit_unlock;

        err = mhi_queue_skb(mbim->mdev, DMA_TO_DEVICE, skb, skb->len, MHI_EOT);

        if (mhi_queue_is_full(mbim->mdev, DMA_TO_DEVICE))
                netif_stop_queue(ndev);

        if (!err)
                mbim->tx_seq++;

exit_unlock:
        spin_unlock_irqrestore(&mbim->tx_lock, flags);

        if (unlikely(err)) {
                net_err_ratelimited("%s: Failed to queue TX buf (%d)\n",
                                    ndev->name, err);
                dev_kfree_skb_any(skb);
                goto exit_drop;
        }

        return NETDEV_TX_OK;

exit_drop:
        u64_stats_update_begin(&link->tx_syncp);
        u64_stats_inc(&link->tx_dropped);
        u64_stats_update_end(&link->tx_syncp);

        return NETDEV_TX_OK;
}

static int mbim_rx_verify_nth16(struct mhi_mbim_context *mbim, struct sk_buff *skb)
{
        struct usb_cdc_ncm_nth16 *nth16;
        int len;

        if (skb->len < sizeof(struct usb_cdc_ncm_nth16) +
                        sizeof(struct usb_cdc_ncm_ndp16)) {
                net_err_ratelimited("frame too short\n");
                return -EINVAL;
        }

        nth16 = (struct usb_cdc_ncm_nth16 *)skb->data;

        if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) {
                net_err_ratelimited("invalid NTH16 signature <%#010x>\n",
                                    le32_to_cpu(nth16->dwSignature));
                return -EINVAL;
        }

        /* No limit on the block length, except the size of the data pkt */
        len = le16_to_cpu(nth16->wBlockLength);
        if (len > skb->len) {
                net_err_ratelimited("NTB does not fit into the skb %u/%u\n",
                                    len, skb->len);
                return -EINVAL;
        }

        if (mbim->rx_seq + 1 != le16_to_cpu(nth16->wSequence) &&
            (mbim->rx_seq || le16_to_cpu(nth16->wSequence)) &&
            !(mbim->rx_seq == 0xffff && !le16_to_cpu(nth16->wSequence))) {
                net_dbg_ratelimited("sequence number glitch prev=%d curr=%d\n",
                                    mbim->rx_seq, le16_to_cpu(nth16->wSequence));
        }
        mbim->rx_seq = le16_to_cpu(nth16->wSequence);

        return le16_to_cpu(nth16->wNdpIndex);
}

static int mbim_rx_verify_ndp16(struct sk_buff *skb, struct usb_cdc_ncm_ndp16 *ndp16)
{
        int ret;

        if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
                net_err_ratelimited("invalid DPT16 length <%u>\n",
                                    le16_to_cpu(ndp16->wLength));
                return -EINVAL;
        }

        ret = ((le16_to_cpu(ndp16->wLength) - sizeof(struct usb_cdc_ncm_ndp16))
                        / sizeof(struct usb_cdc_ncm_dpe16));
        ret--; /* Last entry is always a NULL terminator */

        if (sizeof(struct usb_cdc_ncm_ndp16) +
             ret * sizeof(struct usb_cdc_ncm_dpe16) > skb->len) {
                net_err_ratelimited("Invalid nframes = %d\n", ret);
                return -EINVAL;
        }

        return ret;
}

static void mhi_mbim_rx(struct mhi_mbim_context *mbim, struct sk_buff *skb)
{
        int ndpoffset;

        /* Check NTB header and retrieve first NDP offset */
        ndpoffset = mbim_rx_verify_nth16(mbim, skb);
        if (ndpoffset < 0) {
                net_err_ratelimited("mbim: Incorrect NTB header\n");
                goto error;
        }

        /* Process each NDP */
        while (1) {
                struct usb_cdc_ncm_ndp16 ndp16;
                struct usb_cdc_ncm_dpe16 dpe16;
                struct mhi_mbim_link *link;
                int nframes, n, dpeoffset;
                unsigned int session;

                if (skb_copy_bits(skb, ndpoffset, &ndp16, sizeof(ndp16))) {
                        net_err_ratelimited("mbim: Incorrect NDP offset (%u)\n",
                                            ndpoffset);
                        goto error;
                }

                /* Check NDP header and retrieve number of datagrams */
                nframes = mbim_rx_verify_ndp16(skb, &ndp16);
                if (nframes < 0) {
                        net_err_ratelimited("mbim: Incorrect NDP16\n");
                        goto error;
                }

                 /* Only IP data type supported, no DSS in MHI context */
                if ((ndp16.dwSignature & cpu_to_le32(MBIM_NDP16_SIGN_MASK))
                                != cpu_to_le32(USB_CDC_MBIM_NDP16_IPS_SIGN)) {
                        net_err_ratelimited("mbim: Unsupported NDP type\n");
                        goto next_ndp;
                }

                session = (le32_to_cpu(ndp16.dwSignature) & ~MBIM_NDP16_SIGN_MASK) >> 24;

                rcu_read_lock();

                link = mhi_mbim_get_link_rcu(mbim, session);
                if (!link) {
                        net_err_ratelimited("mbim: bad packet session (%u)\n", session);
                        goto unlock;
                }

                /* de-aggregate and deliver IP packets */
                dpeoffset = ndpoffset + sizeof(struct usb_cdc_ncm_ndp16);
                for (n = 0; n < nframes; n++, dpeoffset += sizeof(dpe16)) {
                        u16 dgram_offset, dgram_len;
                        struct sk_buff *skbn;

                        if (skb_copy_bits(skb, dpeoffset, &dpe16, sizeof(dpe16)))
                                break;

                        dgram_offset = le16_to_cpu(dpe16.wDatagramIndex);
                        dgram_len = le16_to_cpu(dpe16.wDatagramLength);

                        if (!dgram_offset || !dgram_len)
                                break; /* null terminator */

                        skbn = netdev_alloc_skb(link->ndev, dgram_len);
                        if (!skbn)
                                continue;

                        skb_put(skbn, dgram_len);
                        skb_copy_bits(skb, dgram_offset, skbn->data, dgram_len);

                        switch (skbn->data[0] & 0xf0) {
                        case 0x40:
                                skbn->protocol = htons(ETH_P_IP);
                                break;
                        case 0x60:
                                skbn->protocol = htons(ETH_P_IPV6);
                                break;
                        default:
                                net_err_ratelimited("%s: unknown protocol\n",
                                                    link->ndev->name);
                                dev_kfree_skb_any(skbn);
                                u64_stats_update_begin(&link->rx_syncp);
                                u64_stats_inc(&link->rx_errors);
                                u64_stats_update_end(&link->rx_syncp);
                                continue;
                        }

                        u64_stats_update_begin(&link->rx_syncp);
                        u64_stats_inc(&link->rx_packets);
                        u64_stats_add(&link->rx_bytes, skbn->len);
                        u64_stats_update_end(&link->rx_syncp);

                        netif_rx(skbn);
                }
unlock:
                rcu_read_unlock();
next_ndp:
                /* Other NDP to process? */
                ndpoffset = (int)le16_to_cpu(ndp16.wNextNdpIndex);
                if (!ndpoffset)
                        break;
        }

        /* free skb */
        dev_consume_skb_any(skb);
        return;
error:
        dev_kfree_skb_any(skb);
}

static struct sk_buff *mhi_net_skb_agg(struct mhi_mbim_context *mbim,
                                       struct sk_buff *skb)
{
        struct sk_buff *head = mbim->skbagg_head;
        struct sk_buff *tail = mbim->skbagg_tail;

        /* This is non-paged skb chaining using frag_list */
        if (!head) {
                mbim->skbagg_head = skb;
                return skb;
        }

        if (!skb_shinfo(head)->frag_list)
                skb_shinfo(head)->frag_list = skb;
        else
                tail->next = skb;

        head->len += skb->len;
        head->data_len += skb->len;
        head->truesize += skb->truesize;

        mbim->skbagg_tail = skb;

        return mbim->skbagg_head;
}

static void mhi_net_rx_refill_work(struct work_struct *work)
{
        struct mhi_mbim_context *mbim = container_of(work, struct mhi_mbim_context,
                                                     rx_refill.work);
        struct mhi_device *mdev = mbim->mdev;
        int err;

        while (!mhi_queue_is_full(mdev, DMA_FROM_DEVICE)) {
                struct sk_buff *skb = alloc_skb(mbim->mru, GFP_KERNEL);

                if (unlikely(!skb))
                        break;

                err = mhi_queue_skb(mdev, DMA_FROM_DEVICE, skb,
                                    mbim->mru, MHI_EOT);
                if (unlikely(err)) {
                        kfree_skb(skb);
                        break;
                }

                /* Do not hog the CPU if rx buffers are consumed faster than
                 * queued (unlikely).
                 */
                cond_resched();
        }

        /* If we're still starved of rx buffers, reschedule later */
        if (mhi_get_free_desc_count(mdev, DMA_FROM_DEVICE) == mbim->rx_queue_sz)
                schedule_delayed_work(&mbim->rx_refill, HZ / 2);
}

static void mhi_mbim_dl_callback(struct mhi_device *mhi_dev,
                                 struct mhi_result *mhi_res)
{
        struct mhi_mbim_context *mbim = dev_get_drvdata(&mhi_dev->dev);
        struct sk_buff *skb = mhi_res->buf_addr;
        int free_desc_count;

        free_desc_count = mhi_get_free_desc_count(mhi_dev, DMA_FROM_DEVICE);

        if (unlikely(mhi_res->transaction_status)) {
                switch (mhi_res->transaction_status) {
                case -EOVERFLOW:
                        /* Packet has been split over multiple transfers */
                        skb_put(skb, mhi_res->bytes_xferd);
                        mhi_net_skb_agg(mbim, skb);
                        break;
                case -ENOTCONN:
                        /* MHI layer stopping/resetting the DL channel */
                        dev_kfree_skb_any(skb);
                        return;
                default:
                        /* Unknown error, simply drop */
                        dev_kfree_skb_any(skb);
                }
        } else {
                skb_put(skb, mhi_res->bytes_xferd);

                if (mbim->skbagg_head) {
                        /* Aggregate the final fragment */
                        skb = mhi_net_skb_agg(mbim, skb);
                        mbim->skbagg_head = NULL;
                }

                mhi_mbim_rx(mbim, skb);
        }

        /* Refill if RX buffers queue becomes low */
        if (free_desc_count >= mbim->rx_queue_sz / 2)
                schedule_delayed_work(&mbim->rx_refill, 0);
}

static void mhi_mbim_ndo_get_stats64(struct net_device *ndev,
                                     struct rtnl_link_stats64 *stats)
{
        struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);
        unsigned int start;

        do {
                start = u64_stats_fetch_begin(&link->rx_syncp);
                stats->rx_packets = u64_stats_read(&link->rx_packets);
                stats->rx_bytes = u64_stats_read(&link->rx_bytes);
                stats->rx_errors = u64_stats_read(&link->rx_errors);
        } while (u64_stats_fetch_retry(&link->rx_syncp, start));

        do {
                start = u64_stats_fetch_begin(&link->tx_syncp);
                stats->tx_packets = u64_stats_read(&link->tx_packets);
                stats->tx_bytes = u64_stats_read(&link->tx_bytes);
                stats->tx_errors = u64_stats_read(&link->tx_errors);
                stats->tx_dropped = u64_stats_read(&link->tx_dropped);
        } while (u64_stats_fetch_retry(&link->tx_syncp, start));
}

static void mhi_mbim_ul_callback(struct mhi_device *mhi_dev,
                                 struct mhi_result *mhi_res)
{
        struct mhi_mbim_context *mbim = dev_get_drvdata(&mhi_dev->dev);
        struct sk_buff *skb = mhi_res->buf_addr;
        struct net_device *ndev = skb->dev;
        struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);

        /* Hardware has consumed the buffer, so free the skb (which is not
         * freed by the MHI stack) and perform accounting.
         */
        dev_consume_skb_any(skb);

        u64_stats_update_begin(&link->tx_syncp);
        if (unlikely(mhi_res->transaction_status)) {
                /* MHI layer stopping/resetting the UL channel */
                if (mhi_res->transaction_status == -ENOTCONN) {
                        u64_stats_update_end(&link->tx_syncp);
                        return;
                }

                u64_stats_inc(&link->tx_errors);
        } else {
                u64_stats_inc(&link->tx_packets);
                u64_stats_add(&link->tx_bytes, mhi_res->bytes_xferd);
        }
        u64_stats_update_end(&link->tx_syncp);

        if (netif_queue_stopped(ndev) && !mhi_queue_is_full(mbim->mdev, DMA_TO_DEVICE))
                netif_wake_queue(ndev);
}

static int mhi_mbim_ndo_open(struct net_device *ndev)
{
        struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);

        /* Feed the MHI rx buffer pool */
        schedule_delayed_work(&link->mbim->rx_refill, 0);

        /* Carrier is established via out-of-band channel (e.g. qmi) */
        netif_carrier_on(ndev);

        netif_start_queue(ndev);

        return 0;
}

static int mhi_mbim_ndo_stop(struct net_device *ndev)
{
        netif_stop_queue(ndev);
        netif_carrier_off(ndev);

        return 0;
}

static const struct net_device_ops mhi_mbim_ndo = {
        .ndo_open = mhi_mbim_ndo_open,
        .ndo_stop = mhi_mbim_ndo_stop,
        .ndo_start_xmit = mhi_mbim_ndo_xmit,
        .ndo_get_stats64 = mhi_mbim_ndo_get_stats64,
};

static int mhi_mbim_newlink(void *ctxt, struct net_device *ndev, u32 if_id,
                            struct netlink_ext_ack *extack)
{
        struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);
        struct mhi_mbim_context *mbim = ctxt;

        link->mbim = mbim;
        link->session = mhi_mbim_get_link_mux_id(link->mbim->mdev->mhi_cntrl) + if_id;
        link->ndev = ndev;
        u64_stats_init(&link->rx_syncp);
        u64_stats_init(&link->tx_syncp);

        rcu_read_lock();
        if (mhi_mbim_get_link_rcu(mbim, if_id)) {
                rcu_read_unlock();
                return -EEXIST;
        }
        rcu_read_unlock();

        /* Already protected by RTNL lock */
        hlist_add_head_rcu(&link->hlnode, &mbim->link_list[LINK_HASH(if_id)]);

        return register_netdevice(ndev);
}

static void mhi_mbim_dellink(void *ctxt, struct net_device *ndev,
                             struct list_head *head)
{
        struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);

        hlist_del_init_rcu(&link->hlnode);
        synchronize_rcu();

        unregister_netdevice_queue(ndev, head);
}

static void mhi_mbim_setup(struct net_device *ndev)
{
        ndev->header_ops = NULL;  /* No header */
        ndev->type = ARPHRD_RAWIP;
        ndev->needed_headroom = sizeof(struct mbim_tx_hdr);
        ndev->hard_header_len = 0;
        ndev->addr_len = 0;
        ndev->flags = IFF_POINTOPOINT | IFF_NOARP;
        ndev->netdev_ops = &mhi_mbim_ndo;
        ndev->mtu = MHI_MBIM_DEFAULT_MTU;
        ndev->min_mtu = ETH_MIN_MTU;
        ndev->max_mtu = MHI_MAX_BUF_SZ - ndev->needed_headroom;
        ndev->tx_queue_len = 1000;
        ndev->needs_free_netdev = true;
}

static const struct wwan_ops mhi_mbim_wwan_ops = {
        .priv_size = sizeof(struct mhi_mbim_link),
        .setup = mhi_mbim_setup,
        .newlink = mhi_mbim_newlink,
        .dellink = mhi_mbim_dellink,
};

static int mhi_mbim_probe(struct mhi_device *mhi_dev, const struct mhi_device_id *id)
{
        struct mhi_controller *cntrl = mhi_dev->mhi_cntrl;
        struct mhi_mbim_context *mbim;
        int err;

        mbim = devm_kzalloc(&mhi_dev->dev, sizeof(*mbim), GFP_KERNEL);
        if (!mbim)
                return -ENOMEM;

        spin_lock_init(&mbim->tx_lock);
        dev_set_drvdata(&mhi_dev->dev, mbim);
        mbim->mdev = mhi_dev;
        mbim->mru = mhi_dev->mhi_cntrl->mru ? mhi_dev->mhi_cntrl->mru : MHI_DEFAULT_MRU;

        INIT_DELAYED_WORK(&mbim->rx_refill, mhi_net_rx_refill_work);

        /* Start MHI channels */
        err = mhi_prepare_for_transfer(mhi_dev);
        if (err)
                return err;

        /* Number of transfer descriptors determines size of the queue */
        mbim->rx_queue_sz = mhi_get_free_desc_count(mhi_dev, DMA_FROM_DEVICE);

        /* Register wwan link ops with MHI controller representing WWAN instance */
        return wwan_register_ops(&cntrl->mhi_dev->dev, &mhi_mbim_wwan_ops, mbim, 0);
}

static void mhi_mbim_remove(struct mhi_device *mhi_dev)
{
        struct mhi_mbim_context *mbim = dev_get_drvdata(&mhi_dev->dev);
        struct mhi_controller *cntrl = mhi_dev->mhi_cntrl;

        mhi_unprepare_from_transfer(mhi_dev);
        cancel_delayed_work_sync(&mbim->rx_refill);
        wwan_unregister_ops(&cntrl->mhi_dev->dev);
        kfree_skb(mbim->skbagg_head);
        dev_set_drvdata(&mhi_dev->dev, NULL);
}

static const struct mhi_device_id mhi_mbim_id_table[] = {
        /* Hardware accelerated data PATH (to modem IPA), MBIM protocol */
        { .chan = "IP_HW0_MBIM", .driver_data = 0 },
        {}
};
MODULE_DEVICE_TABLE(mhi, mhi_mbim_id_table);

static struct mhi_driver mhi_mbim_driver = {
        .probe = mhi_mbim_probe,
        .remove = mhi_mbim_remove,
        .dl_xfer_cb = mhi_mbim_dl_callback,
        .ul_xfer_cb = mhi_mbim_ul_callback,
        .id_table = mhi_mbim_id_table,
        .driver = {
                .name = "mhi_wwan_mbim",
        },
};

module_mhi_driver(mhi_mbim_driver);

MODULE_AUTHOR("Loic Poulain <loic.poulain@linaro.org>");
MODULE_DESCRIPTION("Network/MBIM over MHI");
MODULE_LICENSE("GPL v2");