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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (c) 2012  Bjørn Mork <bjorn@mork.no>
0004  *
0005  * The probing code is heavily inspired by cdc_ether, which is:
0006  * Copyright (C) 2003-2005 by David Brownell
0007  * Copyright (C) 2006 by Ole Andre Vadla Ravnas (ActiveSync)
0008  */
0009 
0010 #include <linux/module.h>
0011 #include <linux/sched/signal.h>
0012 #include <linux/netdevice.h>
0013 #include <linux/ethtool.h>
0014 #include <linux/etherdevice.h>
0015 #include <linux/if_arp.h>
0016 #include <linux/mii.h>
0017 #include <linux/rtnetlink.h>
0018 #include <linux/usb.h>
0019 #include <linux/usb/cdc.h>
0020 #include <linux/usb/usbnet.h>
0021 #include <linux/usb/cdc-wdm.h>
0022 #include <linux/u64_stats_sync.h>
0023 
0024 /* This driver supports wwan (3G/LTE/?) devices using a vendor
0025  * specific management protocol called Qualcomm MSM Interface (QMI) -
0026  * in addition to the more common AT commands over serial interface
0027  * management
0028  *
0029  * QMI is wrapped in CDC, using CDC encapsulated commands on the
0030  * control ("master") interface of a two-interface CDC Union
0031  * resembling standard CDC ECM.  The devices do not use the control
0032  * interface for any other CDC messages.  Most likely because the
0033  * management protocol is used in place of the standard CDC
0034  * notifications NOTIFY_NETWORK_CONNECTION and NOTIFY_SPEED_CHANGE
0035  *
0036  * Alternatively, control and data functions can be combined in a
0037  * single USB interface.
0038  *
0039  * Handling a protocol like QMI is out of the scope for any driver.
0040  * It is exported as a character device using the cdc-wdm driver as
0041  * a subdriver, enabling userspace applications ("modem managers") to
0042  * handle it.
0043  *
0044  * These devices may alternatively/additionally be configured using AT
0045  * commands on a serial interface
0046  */
0047 
0048 /* driver specific data */
0049 struct qmi_wwan_state {
0050     struct usb_driver *subdriver;
0051     atomic_t pmcount;
0052     unsigned long flags;
0053     struct usb_interface *control;
0054     struct usb_interface *data;
0055 };
0056 
0057 enum qmi_wwan_flags {
0058     QMI_WWAN_FLAG_RAWIP = 1 << 0,
0059     QMI_WWAN_FLAG_MUX = 1 << 1,
0060     QMI_WWAN_FLAG_PASS_THROUGH = 1 << 2,
0061 };
0062 
0063 enum qmi_wwan_quirks {
0064     QMI_WWAN_QUIRK_DTR = 1 << 0,    /* needs "set DTR" request */
0065 };
0066 
0067 struct qmimux_hdr {
0068     u8 pad;
0069     u8 mux_id;
0070     __be16 pkt_len;
0071 };
0072 
0073 struct qmimux_priv {
0074     struct net_device *real_dev;
0075     u8 mux_id;
0076 };
0077 
0078 static int qmimux_open(struct net_device *dev)
0079 {
0080     struct qmimux_priv *priv = netdev_priv(dev);
0081     struct net_device *real_dev = priv->real_dev;
0082 
0083     if (!(priv->real_dev->flags & IFF_UP))
0084         return -ENETDOWN;
0085 
0086     if (netif_carrier_ok(real_dev))
0087         netif_carrier_on(dev);
0088     return 0;
0089 }
0090 
0091 static int qmimux_stop(struct net_device *dev)
0092 {
0093     netif_carrier_off(dev);
0094     return 0;
0095 }
0096 
0097 static netdev_tx_t qmimux_start_xmit(struct sk_buff *skb, struct net_device *dev)
0098 {
0099     struct qmimux_priv *priv = netdev_priv(dev);
0100     unsigned int len = skb->len;
0101     struct qmimux_hdr *hdr;
0102     netdev_tx_t ret;
0103 
0104     hdr = skb_push(skb, sizeof(struct qmimux_hdr));
0105     hdr->pad = 0;
0106     hdr->mux_id = priv->mux_id;
0107     hdr->pkt_len = cpu_to_be16(len);
0108     skb->dev = priv->real_dev;
0109     ret = dev_queue_xmit(skb);
0110 
0111     if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN))
0112         dev_sw_netstats_tx_add(dev, 1, len);
0113     else
0114         dev->stats.tx_dropped++;
0115 
0116     return ret;
0117 }
0118 
0119 static const struct net_device_ops qmimux_netdev_ops = {
0120     .ndo_open        = qmimux_open,
0121     .ndo_stop        = qmimux_stop,
0122     .ndo_start_xmit  = qmimux_start_xmit,
0123     .ndo_get_stats64 = dev_get_tstats64,
0124 };
0125 
0126 static void qmimux_setup(struct net_device *dev)
0127 {
0128     dev->header_ops      = NULL;  /* No header */
0129     dev->type            = ARPHRD_NONE;
0130     dev->hard_header_len = 0;
0131     dev->addr_len        = 0;
0132     dev->flags           = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
0133     dev->netdev_ops      = &qmimux_netdev_ops;
0134     dev->mtu             = 1500;
0135     dev->needs_free_netdev = true;
0136 }
0137 
0138 static struct net_device *qmimux_find_dev(struct usbnet *dev, u8 mux_id)
0139 {
0140     struct qmimux_priv *priv;
0141     struct list_head *iter;
0142     struct net_device *ldev;
0143 
0144     rcu_read_lock();
0145     netdev_for_each_upper_dev_rcu(dev->net, ldev, iter) {
0146         priv = netdev_priv(ldev);
0147         if (priv->mux_id == mux_id) {
0148             rcu_read_unlock();
0149             return ldev;
0150         }
0151     }
0152     rcu_read_unlock();
0153     return NULL;
0154 }
0155 
0156 static bool qmimux_has_slaves(struct usbnet *dev)
0157 {
0158     return !list_empty(&dev->net->adj_list.upper);
0159 }
0160 
0161 static int qmimux_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
0162 {
0163     unsigned int len, offset = 0, pad_len, pkt_len;
0164     struct qmimux_hdr *hdr;
0165     struct net_device *net;
0166     struct sk_buff *skbn;
0167     u8 qmimux_hdr_sz = sizeof(*hdr);
0168 
0169     while (offset + qmimux_hdr_sz < skb->len) {
0170         hdr = (struct qmimux_hdr *)(skb->data + offset);
0171         len = be16_to_cpu(hdr->pkt_len);
0172 
0173         /* drop the packet, bogus length */
0174         if (offset + len + qmimux_hdr_sz > skb->len)
0175             return 0;
0176 
0177         /* control packet, we do not know what to do */
0178         if (hdr->pad & 0x80)
0179             goto skip;
0180 
0181         /* extract padding length and check for valid length info */
0182         pad_len = hdr->pad & 0x3f;
0183         if (len == 0 || pad_len >= len)
0184             goto skip;
0185         pkt_len = len - pad_len;
0186 
0187         net = qmimux_find_dev(dev, hdr->mux_id);
0188         if (!net)
0189             goto skip;
0190         skbn = netdev_alloc_skb(net, pkt_len + LL_MAX_HEADER);
0191         if (!skbn)
0192             return 0;
0193 
0194         switch (skb->data[offset + qmimux_hdr_sz] & 0xf0) {
0195         case 0x40:
0196             skbn->protocol = htons(ETH_P_IP);
0197             break;
0198         case 0x60:
0199             skbn->protocol = htons(ETH_P_IPV6);
0200             break;
0201         default:
0202             /* not ip - do not know what to do */
0203             goto skip;
0204         }
0205 
0206         skb_reserve(skbn, LL_MAX_HEADER);
0207         skb_put_data(skbn, skb->data + offset + qmimux_hdr_sz, pkt_len);
0208         if (netif_rx(skbn) != NET_RX_SUCCESS) {
0209             net->stats.rx_errors++;
0210             return 0;
0211         } else {
0212             dev_sw_netstats_rx_add(net, pkt_len);
0213         }
0214 
0215 skip:
0216         offset += len + qmimux_hdr_sz;
0217     }
0218     return 1;
0219 }
0220 
0221 static ssize_t mux_id_show(struct device *d, struct device_attribute *attr, char *buf)
0222 {
0223     struct net_device *dev = to_net_dev(d);
0224     struct qmimux_priv *priv;
0225 
0226     priv = netdev_priv(dev);
0227 
0228     return sysfs_emit(buf, "0x%02x\n", priv->mux_id);
0229 }
0230 
0231 static DEVICE_ATTR_RO(mux_id);
0232 
0233 static struct attribute *qmi_wwan_sysfs_qmimux_attrs[] = {
0234     &dev_attr_mux_id.attr,
0235     NULL,
0236 };
0237 
0238 static struct attribute_group qmi_wwan_sysfs_qmimux_attr_group = {
0239     .name = "qmap",
0240     .attrs = qmi_wwan_sysfs_qmimux_attrs,
0241 };
0242 
0243 static int qmimux_register_device(struct net_device *real_dev, u8 mux_id)
0244 {
0245     struct net_device *new_dev;
0246     struct qmimux_priv *priv;
0247     int err;
0248 
0249     new_dev = alloc_netdev(sizeof(struct qmimux_priv),
0250                    "qmimux%d", NET_NAME_UNKNOWN, qmimux_setup);
0251     if (!new_dev)
0252         return -ENOBUFS;
0253 
0254     dev_net_set(new_dev, dev_net(real_dev));
0255     priv = netdev_priv(new_dev);
0256     priv->mux_id = mux_id;
0257     priv->real_dev = real_dev;
0258 
0259     new_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
0260     if (!new_dev->tstats) {
0261         err = -ENOBUFS;
0262         goto out_free_newdev;
0263     }
0264 
0265     new_dev->sysfs_groups[0] = &qmi_wwan_sysfs_qmimux_attr_group;
0266 
0267     err = register_netdevice(new_dev);
0268     if (err < 0)
0269         goto out_free_newdev;
0270 
0271     /* Account for reference in struct qmimux_priv_priv */
0272     dev_hold(real_dev);
0273 
0274     err = netdev_upper_dev_link(real_dev, new_dev, NULL);
0275     if (err)
0276         goto out_unregister_netdev;
0277 
0278     netif_stacked_transfer_operstate(real_dev, new_dev);
0279 
0280     return 0;
0281 
0282 out_unregister_netdev:
0283     unregister_netdevice(new_dev);
0284     dev_put(real_dev);
0285 
0286 out_free_newdev:
0287     free_netdev(new_dev);
0288     return err;
0289 }
0290 
0291 static void qmimux_unregister_device(struct net_device *dev,
0292                      struct list_head *head)
0293 {
0294     struct qmimux_priv *priv = netdev_priv(dev);
0295     struct net_device *real_dev = priv->real_dev;
0296 
0297     free_percpu(dev->tstats);
0298     netdev_upper_dev_unlink(real_dev, dev);
0299     unregister_netdevice_queue(dev, head);
0300 
0301     /* Get rid of the reference to real_dev */
0302     dev_put(real_dev);
0303 }
0304 
0305 static void qmi_wwan_netdev_setup(struct net_device *net)
0306 {
0307     struct usbnet *dev = netdev_priv(net);
0308     struct qmi_wwan_state *info = (void *)&dev->data;
0309 
0310     if (info->flags & QMI_WWAN_FLAG_RAWIP) {
0311         net->header_ops      = NULL;  /* No header */
0312         net->type            = ARPHRD_NONE;
0313         net->hard_header_len = 0;
0314         net->addr_len        = 0;
0315         net->flags           = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
0316         set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
0317         netdev_dbg(net, "mode: raw IP\n");
0318     } else if (!net->header_ops) { /* don't bother if already set */
0319         ether_setup(net);
0320         /* Restoring min/max mtu values set originally by usbnet */
0321         net->min_mtu = 0;
0322         net->max_mtu = ETH_MAX_MTU;
0323         clear_bit(EVENT_NO_IP_ALIGN, &dev->flags);
0324         netdev_dbg(net, "mode: Ethernet\n");
0325     }
0326 
0327     /* recalculate buffers after changing hard_header_len */
0328     usbnet_change_mtu(net, net->mtu);
0329 }
0330 
0331 static ssize_t raw_ip_show(struct device *d, struct device_attribute *attr, char *buf)
0332 {
0333     struct usbnet *dev = netdev_priv(to_net_dev(d));
0334     struct qmi_wwan_state *info = (void *)&dev->data;
0335 
0336     return sprintf(buf, "%c\n", info->flags & QMI_WWAN_FLAG_RAWIP ? 'Y' : 'N');
0337 }
0338 
0339 static ssize_t raw_ip_store(struct device *d,  struct device_attribute *attr, const char *buf, size_t len)
0340 {
0341     struct usbnet *dev = netdev_priv(to_net_dev(d));
0342     struct qmi_wwan_state *info = (void *)&dev->data;
0343     bool enable;
0344     int ret;
0345 
0346     if (strtobool(buf, &enable))
0347         return -EINVAL;
0348 
0349     /* no change? */
0350     if (enable == (info->flags & QMI_WWAN_FLAG_RAWIP))
0351         return len;
0352 
0353     /* ip mode cannot be cleared when pass through mode is set */
0354     if (!enable && (info->flags & QMI_WWAN_FLAG_PASS_THROUGH)) {
0355         netdev_err(dev->net,
0356                "Cannot clear ip mode on pass through device\n");
0357         return -EINVAL;
0358     }
0359 
0360     if (!rtnl_trylock())
0361         return restart_syscall();
0362 
0363     /* we don't want to modify a running netdev */
0364     if (netif_running(dev->net)) {
0365         netdev_err(dev->net, "Cannot change a running device\n");
0366         ret = -EBUSY;
0367         goto err;
0368     }
0369 
0370     /* let other drivers deny the change */
0371     ret = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev->net);
0372     ret = notifier_to_errno(ret);
0373     if (ret) {
0374         netdev_err(dev->net, "Type change was refused\n");
0375         goto err;
0376     }
0377 
0378     if (enable)
0379         info->flags |= QMI_WWAN_FLAG_RAWIP;
0380     else
0381         info->flags &= ~QMI_WWAN_FLAG_RAWIP;
0382     qmi_wwan_netdev_setup(dev->net);
0383     call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev->net);
0384     ret = len;
0385 err:
0386     rtnl_unlock();
0387     return ret;
0388 }
0389 
0390 static ssize_t add_mux_show(struct device *d, struct device_attribute *attr, char *buf)
0391 {
0392     struct net_device *dev = to_net_dev(d);
0393     struct qmimux_priv *priv;
0394     struct list_head *iter;
0395     struct net_device *ldev;
0396     ssize_t count = 0;
0397 
0398     rcu_read_lock();
0399     netdev_for_each_upper_dev_rcu(dev, ldev, iter) {
0400         priv = netdev_priv(ldev);
0401         count += scnprintf(&buf[count], PAGE_SIZE - count,
0402                    "0x%02x\n", priv->mux_id);
0403     }
0404     rcu_read_unlock();
0405     return count;
0406 }
0407 
0408 static ssize_t add_mux_store(struct device *d,  struct device_attribute *attr, const char *buf, size_t len)
0409 {
0410     struct usbnet *dev = netdev_priv(to_net_dev(d));
0411     struct qmi_wwan_state *info = (void *)&dev->data;
0412     u8 mux_id;
0413     int ret;
0414 
0415     if (kstrtou8(buf, 0, &mux_id))
0416         return -EINVAL;
0417 
0418     /* mux_id [1 - 254] for compatibility with ip(8) and the rmnet driver */
0419     if (mux_id < 1 || mux_id > 254)
0420         return -EINVAL;
0421 
0422     if (!rtnl_trylock())
0423         return restart_syscall();
0424 
0425     if (qmimux_find_dev(dev, mux_id)) {
0426         netdev_err(dev->net, "mux_id already present\n");
0427         ret = -EINVAL;
0428         goto err;
0429     }
0430 
0431     ret = qmimux_register_device(dev->net, mux_id);
0432     if (!ret) {
0433         info->flags |= QMI_WWAN_FLAG_MUX;
0434         ret = len;
0435     }
0436 err:
0437     rtnl_unlock();
0438     return ret;
0439 }
0440 
0441 static ssize_t del_mux_show(struct device *d, struct device_attribute *attr, char *buf)
0442 {
0443     return add_mux_show(d, attr, buf);
0444 }
0445 
0446 static ssize_t del_mux_store(struct device *d,  struct device_attribute *attr, const char *buf, size_t len)
0447 {
0448     struct usbnet *dev = netdev_priv(to_net_dev(d));
0449     struct qmi_wwan_state *info = (void *)&dev->data;
0450     struct net_device *del_dev;
0451     u8 mux_id;
0452     int ret = 0;
0453 
0454     if (kstrtou8(buf, 0, &mux_id))
0455         return -EINVAL;
0456 
0457     if (!rtnl_trylock())
0458         return restart_syscall();
0459 
0460     del_dev = qmimux_find_dev(dev, mux_id);
0461     if (!del_dev) {
0462         netdev_err(dev->net, "mux_id not present\n");
0463         ret = -EINVAL;
0464         goto err;
0465     }
0466     qmimux_unregister_device(del_dev, NULL);
0467 
0468     if (!qmimux_has_slaves(dev))
0469         info->flags &= ~QMI_WWAN_FLAG_MUX;
0470     ret = len;
0471 err:
0472     rtnl_unlock();
0473     return ret;
0474 }
0475 
0476 static ssize_t pass_through_show(struct device *d,
0477                  struct device_attribute *attr, char *buf)
0478 {
0479     struct usbnet *dev = netdev_priv(to_net_dev(d));
0480     struct qmi_wwan_state *info;
0481 
0482     info = (void *)&dev->data;
0483     return sprintf(buf, "%c\n",
0484                info->flags & QMI_WWAN_FLAG_PASS_THROUGH ? 'Y' : 'N');
0485 }
0486 
0487 static ssize_t pass_through_store(struct device *d,
0488                   struct device_attribute *attr,
0489                   const char *buf, size_t len)
0490 {
0491     struct usbnet *dev = netdev_priv(to_net_dev(d));
0492     struct qmi_wwan_state *info;
0493     bool enable;
0494 
0495     if (strtobool(buf, &enable))
0496         return -EINVAL;
0497 
0498     info = (void *)&dev->data;
0499 
0500     /* no change? */
0501     if (enable == (info->flags & QMI_WWAN_FLAG_PASS_THROUGH))
0502         return len;
0503 
0504     /* pass through mode can be set for raw ip devices only */
0505     if (!(info->flags & QMI_WWAN_FLAG_RAWIP)) {
0506         netdev_err(dev->net,
0507                "Cannot set pass through mode on non ip device\n");
0508         return -EINVAL;
0509     }
0510 
0511     if (enable)
0512         info->flags |= QMI_WWAN_FLAG_PASS_THROUGH;
0513     else
0514         info->flags &= ~QMI_WWAN_FLAG_PASS_THROUGH;
0515 
0516     return len;
0517 }
0518 
0519 static DEVICE_ATTR_RW(raw_ip);
0520 static DEVICE_ATTR_RW(add_mux);
0521 static DEVICE_ATTR_RW(del_mux);
0522 static DEVICE_ATTR_RW(pass_through);
0523 
0524 static struct attribute *qmi_wwan_sysfs_attrs[] = {
0525     &dev_attr_raw_ip.attr,
0526     &dev_attr_add_mux.attr,
0527     &dev_attr_del_mux.attr,
0528     &dev_attr_pass_through.attr,
0529     NULL,
0530 };
0531 
0532 static struct attribute_group qmi_wwan_sysfs_attr_group = {
0533     .name = "qmi",
0534     .attrs = qmi_wwan_sysfs_attrs,
0535 };
0536 
0537 /* default ethernet address used by the modem */
0538 static const u8 default_modem_addr[ETH_ALEN] = {0x02, 0x50, 0xf3};
0539 
0540 static const u8 buggy_fw_addr[ETH_ALEN] = {0x00, 0xa0, 0xc6, 0x00, 0x00, 0x00};
0541 
0542 /* Make up an ethernet header if the packet doesn't have one.
0543  *
0544  * A firmware bug common among several devices cause them to send raw
0545  * IP packets under some circumstances.  There is no way for the
0546  * driver/host to know when this will happen.  And even when the bug
0547  * hits, some packets will still arrive with an intact header.
0548  *
0549  * The supported devices are only capably of sending IPv4, IPv6 and
0550  * ARP packets on a point-to-point link. Any packet with an ethernet
0551  * header will have either our address or a broadcast/multicast
0552  * address as destination.  ARP packets will always have a header.
0553  *
0554  * This means that this function will reliably add the appropriate
0555  * header iff necessary, provided our hardware address does not start
0556  * with 4 or 6.
0557  *
0558  * Another common firmware bug results in all packets being addressed
0559  * to 00:a0:c6:00:00:00 despite the host address being different.
0560  * This function will also fixup such packets.
0561  */
0562 static int qmi_wwan_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
0563 {
0564     struct qmi_wwan_state *info = (void *)&dev->data;
0565     bool rawip = info->flags & QMI_WWAN_FLAG_RAWIP;
0566     __be16 proto;
0567 
0568     /* This check is no longer done by usbnet */
0569     if (skb->len < dev->net->hard_header_len)
0570         return 0;
0571 
0572     if (info->flags & QMI_WWAN_FLAG_MUX)
0573         return qmimux_rx_fixup(dev, skb);
0574 
0575     if (info->flags & QMI_WWAN_FLAG_PASS_THROUGH) {
0576         skb->protocol = htons(ETH_P_MAP);
0577         return 1;
0578     }
0579 
0580     switch (skb->data[0] & 0xf0) {
0581     case 0x40:
0582         proto = htons(ETH_P_IP);
0583         break;
0584     case 0x60:
0585         proto = htons(ETH_P_IPV6);
0586         break;
0587     case 0x00:
0588         if (rawip)
0589             return 0;
0590         if (is_multicast_ether_addr(skb->data))
0591             return 1;
0592         /* possibly bogus destination - rewrite just in case */
0593         skb_reset_mac_header(skb);
0594         goto fix_dest;
0595     default:
0596         if (rawip)
0597             return 0;
0598         /* pass along other packets without modifications */
0599         return 1;
0600     }
0601     if (rawip) {
0602         skb_reset_mac_header(skb);
0603         skb->dev = dev->net; /* normally set by eth_type_trans */
0604         skb->protocol = proto;
0605         return 1;
0606     }
0607 
0608     if (skb_headroom(skb) < ETH_HLEN)
0609         return 0;
0610     skb_push(skb, ETH_HLEN);
0611     skb_reset_mac_header(skb);
0612     eth_hdr(skb)->h_proto = proto;
0613     eth_zero_addr(eth_hdr(skb)->h_source);
0614 fix_dest:
0615     memcpy(eth_hdr(skb)->h_dest, dev->net->dev_addr, ETH_ALEN);
0616     return 1;
0617 }
0618 
0619 /* very simplistic detection of IPv4 or IPv6 headers */
0620 static bool possibly_iphdr(const char *data)
0621 {
0622     return (data[0] & 0xd0) == 0x40;
0623 }
0624 
0625 /* disallow addresses which may be confused with IP headers */
0626 static int qmi_wwan_mac_addr(struct net_device *dev, void *p)
0627 {
0628     int ret;
0629     struct sockaddr *addr = p;
0630 
0631     ret = eth_prepare_mac_addr_change(dev, p);
0632     if (ret < 0)
0633         return ret;
0634     if (possibly_iphdr(addr->sa_data))
0635         return -EADDRNOTAVAIL;
0636     eth_commit_mac_addr_change(dev, p);
0637     return 0;
0638 }
0639 
0640 static const struct net_device_ops qmi_wwan_netdev_ops = {
0641     .ndo_open       = usbnet_open,
0642     .ndo_stop       = usbnet_stop,
0643     .ndo_start_xmit     = usbnet_start_xmit,
0644     .ndo_tx_timeout     = usbnet_tx_timeout,
0645     .ndo_change_mtu     = usbnet_change_mtu,
0646     .ndo_get_stats64    = dev_get_tstats64,
0647     .ndo_set_mac_address    = qmi_wwan_mac_addr,
0648     .ndo_validate_addr  = eth_validate_addr,
0649 };
0650 
0651 /* using a counter to merge subdriver requests with our own into a
0652  * combined state
0653  */
0654 static int qmi_wwan_manage_power(struct usbnet *dev, int on)
0655 {
0656     struct qmi_wwan_state *info = (void *)&dev->data;
0657     int rv;
0658 
0659     dev_dbg(&dev->intf->dev, "%s() pmcount=%d, on=%d\n", __func__,
0660         atomic_read(&info->pmcount), on);
0661 
0662     if ((on && atomic_add_return(1, &info->pmcount) == 1) ||
0663         (!on && atomic_dec_and_test(&info->pmcount))) {
0664         /* need autopm_get/put here to ensure the usbcore sees
0665          * the new value
0666          */
0667         rv = usb_autopm_get_interface(dev->intf);
0668         dev->intf->needs_remote_wakeup = on;
0669         if (!rv)
0670             usb_autopm_put_interface(dev->intf);
0671     }
0672     return 0;
0673 }
0674 
0675 static int qmi_wwan_cdc_wdm_manage_power(struct usb_interface *intf, int on)
0676 {
0677     struct usbnet *dev = usb_get_intfdata(intf);
0678 
0679     /* can be called while disconnecting */
0680     if (!dev)
0681         return 0;
0682     return qmi_wwan_manage_power(dev, on);
0683 }
0684 
0685 /* collect all three endpoints and register subdriver */
0686 static int qmi_wwan_register_subdriver(struct usbnet *dev)
0687 {
0688     int rv;
0689     struct usb_driver *subdriver = NULL;
0690     struct qmi_wwan_state *info = (void *)&dev->data;
0691 
0692     /* collect bulk endpoints */
0693     rv = usbnet_get_endpoints(dev, info->data);
0694     if (rv < 0)
0695         goto err;
0696 
0697     /* update status endpoint if separate control interface */
0698     if (info->control != info->data)
0699         dev->status = &info->control->cur_altsetting->endpoint[0];
0700 
0701     /* require interrupt endpoint for subdriver */
0702     if (!dev->status) {
0703         rv = -EINVAL;
0704         goto err;
0705     }
0706 
0707     /* for subdriver power management */
0708     atomic_set(&info->pmcount, 0);
0709 
0710     /* register subdriver */
0711     subdriver = usb_cdc_wdm_register(info->control, &dev->status->desc,
0712                      4096, WWAN_PORT_QMI,
0713                      &qmi_wwan_cdc_wdm_manage_power);
0714     if (IS_ERR(subdriver)) {
0715         dev_err(&info->control->dev, "subdriver registration failed\n");
0716         rv = PTR_ERR(subdriver);
0717         goto err;
0718     }
0719 
0720     /* prevent usbnet from using status endpoint */
0721     dev->status = NULL;
0722 
0723     /* save subdriver struct for suspend/resume wrappers */
0724     info->subdriver = subdriver;
0725 
0726 err:
0727     return rv;
0728 }
0729 
0730 /* Send CDC SetControlLineState request, setting or clearing the DTR.
0731  * "Required for Autoconnect and 9x30 to wake up" according to the
0732  * GobiNet driver. The requirement has been verified on an MDM9230
0733  * based Sierra Wireless MC7455
0734  */
0735 static int qmi_wwan_change_dtr(struct usbnet *dev, bool on)
0736 {
0737     u8 intf = dev->intf->cur_altsetting->desc.bInterfaceNumber;
0738 
0739     return usbnet_write_cmd(dev, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
0740                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0741                 on ? 0x01 : 0x00, intf, NULL, 0);
0742 }
0743 
0744 static int qmi_wwan_bind(struct usbnet *dev, struct usb_interface *intf)
0745 {
0746     int status;
0747     u8 *buf = intf->cur_altsetting->extra;
0748     int len = intf->cur_altsetting->extralen;
0749     struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
0750     struct usb_cdc_union_desc *cdc_union;
0751     struct usb_cdc_ether_desc *cdc_ether;
0752     struct usb_driver *driver = driver_of(intf);
0753     struct qmi_wwan_state *info = (void *)&dev->data;
0754     struct usb_cdc_parsed_header hdr;
0755 
0756     BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data) <
0757               sizeof(struct qmi_wwan_state)));
0758 
0759     /* set up initial state */
0760     info->control = intf;
0761     info->data = intf;
0762 
0763     /* and a number of CDC descriptors */
0764     cdc_parse_cdc_header(&hdr, intf, buf, len);
0765     cdc_union = hdr.usb_cdc_union_desc;
0766     cdc_ether = hdr.usb_cdc_ether_desc;
0767 
0768     /* Use separate control and data interfaces if we found a CDC Union */
0769     if (cdc_union) {
0770         info->data = usb_ifnum_to_if(dev->udev,
0771                          cdc_union->bSlaveInterface0);
0772         if (desc->bInterfaceNumber != cdc_union->bMasterInterface0 ||
0773             !info->data) {
0774             dev_err(&intf->dev,
0775                 "bogus CDC Union: master=%u, slave=%u\n",
0776                 cdc_union->bMasterInterface0,
0777                 cdc_union->bSlaveInterface0);
0778 
0779             /* ignore and continue... */
0780             cdc_union = NULL;
0781             info->data = intf;
0782         }
0783     }
0784 
0785     /* errors aren't fatal - we can live with the dynamic address */
0786     if (cdc_ether && cdc_ether->wMaxSegmentSize) {
0787         dev->hard_mtu = le16_to_cpu(cdc_ether->wMaxSegmentSize);
0788         usbnet_get_ethernet_addr(dev, cdc_ether->iMACAddress);
0789     }
0790 
0791     /* claim data interface and set it up */
0792     if (info->control != info->data) {
0793         status = usb_driver_claim_interface(driver, info->data, dev);
0794         if (status < 0)
0795             goto err;
0796     }
0797 
0798     status = qmi_wwan_register_subdriver(dev);
0799     if (status < 0 && info->control != info->data) {
0800         usb_set_intfdata(info->data, NULL);
0801         usb_driver_release_interface(driver, info->data);
0802     }
0803 
0804     /* disabling remote wakeup on MDM9x30 devices has the same
0805      * effect as clearing DTR. The device will not respond to QMI
0806      * requests until we set DTR again.  This is similar to a
0807      * QMI_CTL SYNC request, clearing a lot of firmware state
0808      * including the client ID allocations.
0809      *
0810      * Our usage model allows a session to span multiple
0811      * open/close events, so we must prevent the firmware from
0812      * clearing out state the clients might need.
0813      *
0814      * MDM9x30 is the first QMI chipset with USB3 support. Abuse
0815      * this fact to enable the quirk for all USB3 devices.
0816      *
0817      * There are also chipsets with the same "set DTR" requirement
0818      * but without USB3 support.  Devices based on these chips
0819      * need a quirk flag in the device ID table.
0820      */
0821     if (dev->driver_info->data & QMI_WWAN_QUIRK_DTR ||
0822         le16_to_cpu(dev->udev->descriptor.bcdUSB) >= 0x0201) {
0823         qmi_wwan_manage_power(dev, 1);
0824         qmi_wwan_change_dtr(dev, true);
0825     }
0826 
0827     /* Never use the same address on both ends of the link, even if the
0828      * buggy firmware told us to. Or, if device is assigned the well-known
0829      * buggy firmware MAC address, replace it with a random address,
0830      */
0831     if (ether_addr_equal(dev->net->dev_addr, default_modem_addr) ||
0832         ether_addr_equal(dev->net->dev_addr, buggy_fw_addr))
0833         eth_hw_addr_random(dev->net);
0834 
0835     /* make MAC addr easily distinguishable from an IP header */
0836     if (possibly_iphdr(dev->net->dev_addr)) {
0837         u8 addr = dev->net->dev_addr[0];
0838 
0839         addr |= 0x02;   /* set local assignment bit */
0840         addr &= 0xbf;   /* clear "IP" bit */
0841         dev_addr_mod(dev->net, 0, &addr, 1);
0842     }
0843     dev->net->netdev_ops = &qmi_wwan_netdev_ops;
0844     dev->net->sysfs_groups[0] = &qmi_wwan_sysfs_attr_group;
0845 err:
0846     return status;
0847 }
0848 
0849 static void qmi_wwan_unbind(struct usbnet *dev, struct usb_interface *intf)
0850 {
0851     struct qmi_wwan_state *info = (void *)&dev->data;
0852     struct usb_driver *driver = driver_of(intf);
0853     struct usb_interface *other;
0854 
0855     if (info->subdriver && info->subdriver->disconnect)
0856         info->subdriver->disconnect(info->control);
0857 
0858     /* disable MDM9x30 quirk */
0859     if (le16_to_cpu(dev->udev->descriptor.bcdUSB) >= 0x0201) {
0860         qmi_wwan_change_dtr(dev, false);
0861         qmi_wwan_manage_power(dev, 0);
0862     }
0863 
0864     /* allow user to unbind using either control or data */
0865     if (intf == info->control)
0866         other = info->data;
0867     else
0868         other = info->control;
0869 
0870     /* only if not shared */
0871     if (other && intf != other) {
0872         usb_set_intfdata(other, NULL);
0873         usb_driver_release_interface(driver, other);
0874     }
0875 
0876     info->subdriver = NULL;
0877     info->data = NULL;
0878     info->control = NULL;
0879 }
0880 
0881 /* suspend/resume wrappers calling both usbnet and the cdc-wdm
0882  * subdriver if present.
0883  *
0884  * NOTE: cdc-wdm also supports pre/post_reset, but we cannot provide
0885  * wrappers for those without adding usbnet reset support first.
0886  */
0887 static int qmi_wwan_suspend(struct usb_interface *intf, pm_message_t message)
0888 {
0889     struct usbnet *dev = usb_get_intfdata(intf);
0890     struct qmi_wwan_state *info = (void *)&dev->data;
0891     int ret;
0892 
0893     /* Both usbnet_suspend() and subdriver->suspend() MUST return 0
0894      * in system sleep context, otherwise, the resume callback has
0895      * to recover device from previous suspend failure.
0896      */
0897     ret = usbnet_suspend(intf, message);
0898     if (ret < 0)
0899         goto err;
0900 
0901     if (intf == info->control && info->subdriver &&
0902         info->subdriver->suspend)
0903         ret = info->subdriver->suspend(intf, message);
0904     if (ret < 0)
0905         usbnet_resume(intf);
0906 err:
0907     return ret;
0908 }
0909 
0910 static int qmi_wwan_resume(struct usb_interface *intf)
0911 {
0912     struct usbnet *dev = usb_get_intfdata(intf);
0913     struct qmi_wwan_state *info = (void *)&dev->data;
0914     int ret = 0;
0915     bool callsub = (intf == info->control && info->subdriver &&
0916             info->subdriver->resume);
0917 
0918     if (callsub)
0919         ret = info->subdriver->resume(intf);
0920     if (ret < 0)
0921         goto err;
0922     ret = usbnet_resume(intf);
0923     if (ret < 0 && callsub)
0924         info->subdriver->suspend(intf, PMSG_SUSPEND);
0925 err:
0926     return ret;
0927 }
0928 
0929 static const struct driver_info qmi_wwan_info = {
0930     .description    = "WWAN/QMI device",
0931     .flags      = FLAG_WWAN | FLAG_SEND_ZLP,
0932     .bind       = qmi_wwan_bind,
0933     .unbind     = qmi_wwan_unbind,
0934     .manage_power   = qmi_wwan_manage_power,
0935     .rx_fixup       = qmi_wwan_rx_fixup,
0936 };
0937 
0938 static const struct driver_info qmi_wwan_info_quirk_dtr = {
0939     .description    = "WWAN/QMI device",
0940     .flags      = FLAG_WWAN | FLAG_SEND_ZLP,
0941     .bind       = qmi_wwan_bind,
0942     .unbind     = qmi_wwan_unbind,
0943     .manage_power   = qmi_wwan_manage_power,
0944     .rx_fixup       = qmi_wwan_rx_fixup,
0945     .data           = QMI_WWAN_QUIRK_DTR,
0946 };
0947 
0948 #define HUAWEI_VENDOR_ID    0x12D1
0949 
0950 /* map QMI/wwan function by a fixed interface number */
0951 #define QMI_FIXED_INTF(vend, prod, num) \
0952     USB_DEVICE_INTERFACE_NUMBER(vend, prod, num), \
0953     .driver_info = (unsigned long)&qmi_wwan_info
0954 
0955 /* devices requiring "set DTR" quirk */
0956 #define QMI_QUIRK_SET_DTR(vend, prod, num) \
0957     USB_DEVICE_INTERFACE_NUMBER(vend, prod, num), \
0958     .driver_info = (unsigned long)&qmi_wwan_info_quirk_dtr
0959 
0960 /* Gobi 1000 QMI/wwan interface number is 3 according to qcserial */
0961 #define QMI_GOBI1K_DEVICE(vend, prod) \
0962     QMI_FIXED_INTF(vend, prod, 3)
0963 
0964 /* Gobi 2000/3000 QMI/wwan interface number is 0 according to qcserial */
0965 #define QMI_GOBI_DEVICE(vend, prod) \
0966     QMI_FIXED_INTF(vend, prod, 0)
0967 
0968 /* Many devices have QMI and DIAG functions which are distinguishable
0969  * from other vendor specific functions by class, subclass and
0970  * protocol all being 0xff. The DIAG function has exactly 2 endpoints
0971  * and is silently rejected when probed.
0972  *
0973  * This makes it possible to match dynamically numbered QMI functions
0974  * as seen on e.g. many Quectel modems.
0975  */
0976 #define QMI_MATCH_FF_FF_FF(vend, prod) \
0977     USB_DEVICE_AND_INTERFACE_INFO(vend, prod, USB_CLASS_VENDOR_SPEC, \
0978                       USB_SUBCLASS_VENDOR_SPEC, 0xff), \
0979     .driver_info = (unsigned long)&qmi_wwan_info_quirk_dtr
0980 
0981 static const struct usb_device_id products[] = {
0982     /* 1. CDC ECM like devices match on the control interface */
0983     {   /* Huawei E392, E398 and possibly others sharing both device id and more... */
0984         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 9),
0985         .driver_info        = (unsigned long)&qmi_wwan_info,
0986     },
0987     {   /* Vodafone/Huawei K5005 (12d1:14c8) and similar modems */
0988         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 57),
0989         .driver_info        = (unsigned long)&qmi_wwan_info,
0990     },
0991     {   /* HUAWEI_INTERFACE_NDIS_CONTROL_QUALCOMM */
0992         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 0x01, 0x69),
0993         .driver_info        = (unsigned long)&qmi_wwan_info,
0994     },
0995     {   /* Motorola Mapphone devices with MDM6600 */
0996         USB_VENDOR_AND_INTERFACE_INFO(0x22b8, USB_CLASS_VENDOR_SPEC, 0xfb, 0xff),
0997         .driver_info        = (unsigned long)&qmi_wwan_info,
0998     },
0999 
1000     /* 2. Combined interface devices matching on class+protocol */
1001     {   /* Huawei E367 and possibly others in "Windows mode" */
1002         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 7),
1003         .driver_info        = (unsigned long)&qmi_wwan_info,
1004     },
1005     {   /* Huawei E392, E398 and possibly others in "Windows mode" */
1006         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 17),
1007         .driver_info        = (unsigned long)&qmi_wwan_info,
1008     },
1009     {   /* HUAWEI_NDIS_SINGLE_INTERFACE_VDF */
1010         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 0x01, 0x37),
1011         .driver_info        = (unsigned long)&qmi_wwan_info,
1012     },
1013     {   /* HUAWEI_INTERFACE_NDIS_HW_QUALCOMM */
1014         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 0x01, 0x67),
1015         .driver_info        = (unsigned long)&qmi_wwan_info,
1016     },
1017     {   /* Pantech UML290, P4200 and more */
1018         USB_VENDOR_AND_INTERFACE_INFO(0x106c, USB_CLASS_VENDOR_SPEC, 0xf0, 0xff),
1019         .driver_info        = (unsigned long)&qmi_wwan_info,
1020     },
1021     {   /* Pantech UML290 - newer firmware */
1022         USB_VENDOR_AND_INTERFACE_INFO(0x106c, USB_CLASS_VENDOR_SPEC, 0xf1, 0xff),
1023         .driver_info        = (unsigned long)&qmi_wwan_info,
1024     },
1025     {   /* Novatel USB551L and MC551 */
1026         USB_DEVICE_AND_INTERFACE_INFO(0x1410, 0xb001,
1027                                       USB_CLASS_COMM,
1028                                       USB_CDC_SUBCLASS_ETHERNET,
1029                                       USB_CDC_PROTO_NONE),
1030         .driver_info        = (unsigned long)&qmi_wwan_info,
1031     },
1032     {   /* Novatel E362 */
1033         USB_DEVICE_AND_INTERFACE_INFO(0x1410, 0x9010,
1034                                       USB_CLASS_COMM,
1035                                       USB_CDC_SUBCLASS_ETHERNET,
1036                                       USB_CDC_PROTO_NONE),
1037         .driver_info        = (unsigned long)&qmi_wwan_info,
1038     },
1039     {   /* Novatel Expedite E371 */
1040         USB_DEVICE_AND_INTERFACE_INFO(0x1410, 0x9011,
1041                                       USB_CLASS_COMM,
1042                                       USB_CDC_SUBCLASS_ETHERNET,
1043                                       USB_CDC_PROTO_NONE),
1044         .driver_info        = (unsigned long)&qmi_wwan_info,
1045     },
1046     {   /* Dell Wireless 5800 (Novatel E362) */
1047         USB_DEVICE_AND_INTERFACE_INFO(0x413C, 0x8195,
1048                           USB_CLASS_COMM,
1049                           USB_CDC_SUBCLASS_ETHERNET,
1050                           USB_CDC_PROTO_NONE),
1051         .driver_info        = (unsigned long)&qmi_wwan_info,
1052     },
1053     {   /* Dell Wireless 5800 V2 (Novatel E362) */
1054         USB_DEVICE_AND_INTERFACE_INFO(0x413C, 0x8196,
1055                           USB_CLASS_COMM,
1056                           USB_CDC_SUBCLASS_ETHERNET,
1057                           USB_CDC_PROTO_NONE),
1058         .driver_info        = (unsigned long)&qmi_wwan_info,
1059     },
1060     {   /* Dell Wireless 5804 (Novatel E371) */
1061         USB_DEVICE_AND_INTERFACE_INFO(0x413C, 0x819b,
1062                           USB_CLASS_COMM,
1063                           USB_CDC_SUBCLASS_ETHERNET,
1064                           USB_CDC_PROTO_NONE),
1065         .driver_info        = (unsigned long)&qmi_wwan_info,
1066     },
1067     {   /* ADU960S */
1068         USB_DEVICE_AND_INTERFACE_INFO(0x16d5, 0x650a,
1069                           USB_CLASS_COMM,
1070                           USB_CDC_SUBCLASS_ETHERNET,
1071                           USB_CDC_PROTO_NONE),
1072         .driver_info        = (unsigned long)&qmi_wwan_info,
1073     },
1074     {   /* HP lt2523 (Novatel E371) */
1075         USB_DEVICE_AND_INTERFACE_INFO(0x03f0, 0x421d,
1076                           USB_CLASS_COMM,
1077                           USB_CDC_SUBCLASS_ETHERNET,
1078                           USB_CDC_PROTO_NONE),
1079         .driver_info        = (unsigned long)&qmi_wwan_info,
1080     },
1081     {   /* HP lt4112 LTE/HSPA+ Gobi 4G Module (Huawei me906e) */
1082         USB_DEVICE_AND_INTERFACE_INFO(0x03f0, 0x581d, USB_CLASS_VENDOR_SPEC, 1, 7),
1083         .driver_info = (unsigned long)&qmi_wwan_info,
1084     },
1085     {QMI_MATCH_FF_FF_FF(0x2c7c, 0x0125)},   /* Quectel EC25, EC20 R2.0  Mini PCIe */
1086     {QMI_MATCH_FF_FF_FF(0x2c7c, 0x0306)},   /* Quectel EP06/EG06/EM06 */
1087     {QMI_MATCH_FF_FF_FF(0x2c7c, 0x0512)},   /* Quectel EG12/EM12 */
1088     {QMI_MATCH_FF_FF_FF(0x2c7c, 0x0620)},   /* Quectel EM160R-GL */
1089     {QMI_MATCH_FF_FF_FF(0x2c7c, 0x0800)},   /* Quectel RM500Q-GL */
1090     {QMI_MATCH_FF_FF_FF(0x2c7c, 0x0801)},   /* Quectel RM520N */
1091 
1092     /* 3. Combined interface devices matching on interface number */
1093     {QMI_FIXED_INTF(0x0408, 0xea42, 4)},    /* Yota / Megafon M100-1 */
1094     {QMI_FIXED_INTF(0x05c6, 0x6001, 3)},    /* 4G LTE usb-modem U901 */
1095     {QMI_FIXED_INTF(0x05c6, 0x7000, 0)},
1096     {QMI_FIXED_INTF(0x05c6, 0x7001, 1)},
1097     {QMI_FIXED_INTF(0x05c6, 0x7002, 1)},
1098     {QMI_FIXED_INTF(0x05c6, 0x7101, 1)},
1099     {QMI_FIXED_INTF(0x05c6, 0x7101, 2)},
1100     {QMI_FIXED_INTF(0x05c6, 0x7101, 3)},
1101     {QMI_FIXED_INTF(0x05c6, 0x7102, 1)},
1102     {QMI_FIXED_INTF(0x05c6, 0x7102, 2)},
1103     {QMI_FIXED_INTF(0x05c6, 0x7102, 3)},
1104     {QMI_FIXED_INTF(0x05c6, 0x8000, 7)},
1105     {QMI_FIXED_INTF(0x05c6, 0x8001, 6)},
1106     {QMI_FIXED_INTF(0x05c6, 0x9000, 4)},
1107     {QMI_FIXED_INTF(0x05c6, 0x9003, 4)},
1108     {QMI_FIXED_INTF(0x05c6, 0x9005, 2)},
1109     {QMI_FIXED_INTF(0x05c6, 0x900a, 4)},
1110     {QMI_FIXED_INTF(0x05c6, 0x900b, 2)},
1111     {QMI_FIXED_INTF(0x05c6, 0x900c, 4)},
1112     {QMI_FIXED_INTF(0x05c6, 0x900c, 5)},
1113     {QMI_FIXED_INTF(0x05c6, 0x900c, 6)},
1114     {QMI_FIXED_INTF(0x05c6, 0x900d, 5)},
1115     {QMI_FIXED_INTF(0x05c6, 0x900f, 3)},
1116     {QMI_FIXED_INTF(0x05c6, 0x900f, 4)},
1117     {QMI_FIXED_INTF(0x05c6, 0x900f, 5)},
1118     {QMI_FIXED_INTF(0x05c6, 0x9010, 4)},
1119     {QMI_FIXED_INTF(0x05c6, 0x9010, 5)},
1120     {QMI_FIXED_INTF(0x05c6, 0x9011, 3)},
1121     {QMI_FIXED_INTF(0x05c6, 0x9011, 4)},
1122     {QMI_FIXED_INTF(0x05c6, 0x9021, 1)},
1123     {QMI_FIXED_INTF(0x05c6, 0x9022, 2)},
1124     {QMI_QUIRK_SET_DTR(0x05c6, 0x9025, 4)}, /* Alcatel-sbell ASB TL131 TDD LTE (China Mobile) */
1125     {QMI_FIXED_INTF(0x05c6, 0x9026, 3)},
1126     {QMI_FIXED_INTF(0x05c6, 0x902e, 5)},
1127     {QMI_FIXED_INTF(0x05c6, 0x9031, 5)},
1128     {QMI_FIXED_INTF(0x05c6, 0x9032, 4)},
1129     {QMI_FIXED_INTF(0x05c6, 0x9033, 3)},
1130     {QMI_FIXED_INTF(0x05c6, 0x9033, 4)},
1131     {QMI_FIXED_INTF(0x05c6, 0x9033, 5)},
1132     {QMI_FIXED_INTF(0x05c6, 0x9033, 6)},
1133     {QMI_FIXED_INTF(0x05c6, 0x9034, 3)},
1134     {QMI_FIXED_INTF(0x05c6, 0x9034, 4)},
1135     {QMI_FIXED_INTF(0x05c6, 0x9034, 5)},
1136     {QMI_FIXED_INTF(0x05c6, 0x9034, 6)},
1137     {QMI_FIXED_INTF(0x05c6, 0x9034, 7)},
1138     {QMI_FIXED_INTF(0x05c6, 0x9035, 4)},
1139     {QMI_FIXED_INTF(0x05c6, 0x9036, 3)},
1140     {QMI_FIXED_INTF(0x05c6, 0x9037, 5)},
1141     {QMI_FIXED_INTF(0x05c6, 0x9038, 4)},
1142     {QMI_FIXED_INTF(0x05c6, 0x903b, 7)},
1143     {QMI_FIXED_INTF(0x05c6, 0x903c, 6)},
1144     {QMI_FIXED_INTF(0x05c6, 0x903d, 6)},
1145     {QMI_FIXED_INTF(0x05c6, 0x903e, 5)},
1146     {QMI_FIXED_INTF(0x05c6, 0x9043, 3)},
1147     {QMI_FIXED_INTF(0x05c6, 0x9046, 3)},
1148     {QMI_FIXED_INTF(0x05c6, 0x9046, 4)},
1149     {QMI_FIXED_INTF(0x05c6, 0x9046, 5)},
1150     {QMI_FIXED_INTF(0x05c6, 0x9047, 2)},
1151     {QMI_FIXED_INTF(0x05c6, 0x9047, 3)},
1152     {QMI_FIXED_INTF(0x05c6, 0x9047, 4)},
1153     {QMI_FIXED_INTF(0x05c6, 0x9048, 4)},
1154     {QMI_FIXED_INTF(0x05c6, 0x9048, 5)},
1155     {QMI_FIXED_INTF(0x05c6, 0x9048, 6)},
1156     {QMI_FIXED_INTF(0x05c6, 0x9048, 7)},
1157     {QMI_FIXED_INTF(0x05c6, 0x9048, 8)},
1158     {QMI_FIXED_INTF(0x05c6, 0x904c, 5)},
1159     {QMI_FIXED_INTF(0x05c6, 0x904c, 6)},
1160     {QMI_FIXED_INTF(0x05c6, 0x904c, 7)},
1161     {QMI_FIXED_INTF(0x05c6, 0x904c, 8)},
1162     {QMI_FIXED_INTF(0x05c6, 0x9050, 3)},
1163     {QMI_FIXED_INTF(0x05c6, 0x9052, 4)},
1164     {QMI_FIXED_INTF(0x05c6, 0x9053, 6)},
1165     {QMI_FIXED_INTF(0x05c6, 0x9053, 7)},
1166     {QMI_FIXED_INTF(0x05c6, 0x9054, 5)},
1167     {QMI_FIXED_INTF(0x05c6, 0x9054, 6)},
1168     {QMI_FIXED_INTF(0x05c6, 0x9055, 3)},
1169     {QMI_FIXED_INTF(0x05c6, 0x9055, 4)},
1170     {QMI_FIXED_INTF(0x05c6, 0x9055, 5)},
1171     {QMI_FIXED_INTF(0x05c6, 0x9055, 6)},
1172     {QMI_FIXED_INTF(0x05c6, 0x9055, 7)},
1173     {QMI_FIXED_INTF(0x05c6, 0x9056, 3)},
1174     {QMI_FIXED_INTF(0x05c6, 0x9062, 2)},
1175     {QMI_FIXED_INTF(0x05c6, 0x9062, 3)},
1176     {QMI_FIXED_INTF(0x05c6, 0x9062, 4)},
1177     {QMI_FIXED_INTF(0x05c6, 0x9062, 5)},
1178     {QMI_FIXED_INTF(0x05c6, 0x9062, 6)},
1179     {QMI_FIXED_INTF(0x05c6, 0x9062, 7)},
1180     {QMI_FIXED_INTF(0x05c6, 0x9062, 8)},
1181     {QMI_FIXED_INTF(0x05c6, 0x9062, 9)},
1182     {QMI_FIXED_INTF(0x05c6, 0x9064, 3)},
1183     {QMI_FIXED_INTF(0x05c6, 0x9065, 6)},
1184     {QMI_FIXED_INTF(0x05c6, 0x9065, 7)},
1185     {QMI_FIXED_INTF(0x05c6, 0x9066, 5)},
1186     {QMI_FIXED_INTF(0x05c6, 0x9066, 6)},
1187     {QMI_FIXED_INTF(0x05c6, 0x9067, 1)},
1188     {QMI_FIXED_INTF(0x05c6, 0x9068, 2)},
1189     {QMI_FIXED_INTF(0x05c6, 0x9068, 3)},
1190     {QMI_FIXED_INTF(0x05c6, 0x9068, 4)},
1191     {QMI_FIXED_INTF(0x05c6, 0x9068, 5)},
1192     {QMI_FIXED_INTF(0x05c6, 0x9068, 6)},
1193     {QMI_FIXED_INTF(0x05c6, 0x9068, 7)},
1194     {QMI_FIXED_INTF(0x05c6, 0x9069, 5)},
1195     {QMI_FIXED_INTF(0x05c6, 0x9069, 6)},
1196     {QMI_FIXED_INTF(0x05c6, 0x9069, 7)},
1197     {QMI_FIXED_INTF(0x05c6, 0x9069, 8)},
1198     {QMI_FIXED_INTF(0x05c6, 0x9070, 4)},
1199     {QMI_FIXED_INTF(0x05c6, 0x9070, 5)},
1200     {QMI_FIXED_INTF(0x05c6, 0x9075, 5)},
1201     {QMI_FIXED_INTF(0x05c6, 0x9076, 4)},
1202     {QMI_FIXED_INTF(0x05c6, 0x9076, 5)},
1203     {QMI_FIXED_INTF(0x05c6, 0x9076, 6)},
1204     {QMI_FIXED_INTF(0x05c6, 0x9076, 7)},
1205     {QMI_FIXED_INTF(0x05c6, 0x9076, 8)},
1206     {QMI_FIXED_INTF(0x05c6, 0x9077, 3)},
1207     {QMI_FIXED_INTF(0x05c6, 0x9077, 4)},
1208     {QMI_FIXED_INTF(0x05c6, 0x9077, 5)},
1209     {QMI_FIXED_INTF(0x05c6, 0x9077, 6)},
1210     {QMI_FIXED_INTF(0x05c6, 0x9078, 3)},
1211     {QMI_FIXED_INTF(0x05c6, 0x9079, 4)},
1212     {QMI_FIXED_INTF(0x05c6, 0x9079, 5)},
1213     {QMI_FIXED_INTF(0x05c6, 0x9079, 6)},
1214     {QMI_FIXED_INTF(0x05c6, 0x9079, 7)},
1215     {QMI_FIXED_INTF(0x05c6, 0x9079, 8)},
1216     {QMI_FIXED_INTF(0x05c6, 0x9080, 5)},
1217     {QMI_FIXED_INTF(0x05c6, 0x9080, 6)},
1218     {QMI_FIXED_INTF(0x05c6, 0x9080, 7)},
1219     {QMI_FIXED_INTF(0x05c6, 0x9080, 8)},
1220     {QMI_FIXED_INTF(0x05c6, 0x9083, 3)},
1221     {QMI_FIXED_INTF(0x05c6, 0x9084, 4)},
1222     {QMI_FIXED_INTF(0x05c6, 0x90b2, 3)},    /* ublox R410M */
1223     {QMI_FIXED_INTF(0x05c6, 0x920d, 0)},
1224     {QMI_FIXED_INTF(0x05c6, 0x920d, 5)},
1225     {QMI_QUIRK_SET_DTR(0x05c6, 0x9625, 4)}, /* YUGA CLM920-NC5 */
1226     {QMI_FIXED_INTF(0x0846, 0x68a2, 8)},
1227     {QMI_FIXED_INTF(0x0846, 0x68d3, 8)},    /* Netgear Aircard 779S */
1228     {QMI_FIXED_INTF(0x12d1, 0x140c, 1)},    /* Huawei E173 */
1229     {QMI_FIXED_INTF(0x12d1, 0x14ac, 1)},    /* Huawei E1820 */
1230     {QMI_FIXED_INTF(0x1435, 0x0918, 3)},    /* Wistron NeWeb D16Q1 */
1231     {QMI_FIXED_INTF(0x1435, 0x0918, 4)},    /* Wistron NeWeb D16Q1 */
1232     {QMI_FIXED_INTF(0x1435, 0x0918, 5)},    /* Wistron NeWeb D16Q1 */
1233     {QMI_FIXED_INTF(0x1435, 0x3185, 4)},    /* Wistron NeWeb M18Q5 */
1234     {QMI_FIXED_INTF(0x1435, 0xd111, 4)},    /* M9615A DM11-1 D51QC */
1235     {QMI_FIXED_INTF(0x1435, 0xd181, 3)},    /* Wistron NeWeb D18Q1 */
1236     {QMI_FIXED_INTF(0x1435, 0xd181, 4)},    /* Wistron NeWeb D18Q1 */
1237     {QMI_FIXED_INTF(0x1435, 0xd181, 5)},    /* Wistron NeWeb D18Q1 */
1238     {QMI_FIXED_INTF(0x1435, 0xd182, 4)},    /* Wistron NeWeb D18 */
1239     {QMI_FIXED_INTF(0x1435, 0xd182, 5)},    /* Wistron NeWeb D18 */
1240     {QMI_FIXED_INTF(0x1435, 0xd191, 4)},    /* Wistron NeWeb D19Q1 */
1241     {QMI_QUIRK_SET_DTR(0x1508, 0x1001, 4)}, /* Fibocom NL668 series */
1242     {QMI_FIXED_INTF(0x1690, 0x7588, 4)},    /* ASKEY WWHC050 */
1243     {QMI_FIXED_INTF(0x16d8, 0x6003, 0)},    /* CMOTech 6003 */
1244     {QMI_FIXED_INTF(0x16d8, 0x6007, 0)},    /* CMOTech CHE-628S */
1245     {QMI_FIXED_INTF(0x16d8, 0x6008, 0)},    /* CMOTech CMU-301 */
1246     {QMI_FIXED_INTF(0x16d8, 0x6280, 0)},    /* CMOTech CHU-628 */
1247     {QMI_FIXED_INTF(0x16d8, 0x7001, 0)},    /* CMOTech CHU-720S */
1248     {QMI_FIXED_INTF(0x16d8, 0x7002, 0)},    /* CMOTech 7002 */
1249     {QMI_FIXED_INTF(0x16d8, 0x7003, 4)},    /* CMOTech CHU-629K */
1250     {QMI_FIXED_INTF(0x16d8, 0x7004, 3)},    /* CMOTech 7004 */
1251     {QMI_FIXED_INTF(0x16d8, 0x7006, 5)},    /* CMOTech CGU-629 */
1252     {QMI_FIXED_INTF(0x16d8, 0x700a, 4)},    /* CMOTech CHU-629S */
1253     {QMI_FIXED_INTF(0x16d8, 0x7211, 0)},    /* CMOTech CHU-720I */
1254     {QMI_FIXED_INTF(0x16d8, 0x7212, 0)},    /* CMOTech 7212 */
1255     {QMI_FIXED_INTF(0x16d8, 0x7213, 0)},    /* CMOTech 7213 */
1256     {QMI_FIXED_INTF(0x16d8, 0x7251, 1)},    /* CMOTech 7251 */
1257     {QMI_FIXED_INTF(0x16d8, 0x7252, 1)},    /* CMOTech 7252 */
1258     {QMI_FIXED_INTF(0x16d8, 0x7253, 1)},    /* CMOTech 7253 */
1259     {QMI_FIXED_INTF(0x19d2, 0x0002, 1)},
1260     {QMI_FIXED_INTF(0x19d2, 0x0012, 1)},
1261     {QMI_FIXED_INTF(0x19d2, 0x0017, 3)},
1262     {QMI_FIXED_INTF(0x19d2, 0x0019, 3)},    /* ONDA MT689DC */
1263     {QMI_FIXED_INTF(0x19d2, 0x0021, 4)},
1264     {QMI_FIXED_INTF(0x19d2, 0x0025, 1)},
1265     {QMI_FIXED_INTF(0x19d2, 0x0031, 4)},
1266     {QMI_FIXED_INTF(0x19d2, 0x0042, 4)},
1267     {QMI_FIXED_INTF(0x19d2, 0x0049, 5)},
1268     {QMI_FIXED_INTF(0x19d2, 0x0052, 4)},
1269     {QMI_FIXED_INTF(0x19d2, 0x0055, 1)},    /* ZTE (Vodafone) K3520-Z */
1270     {QMI_FIXED_INTF(0x19d2, 0x0058, 4)},
1271     {QMI_FIXED_INTF(0x19d2, 0x0063, 4)},    /* ZTE (Vodafone) K3565-Z */
1272     {QMI_FIXED_INTF(0x19d2, 0x0104, 4)},    /* ZTE (Vodafone) K4505-Z */
1273     {QMI_FIXED_INTF(0x19d2, 0x0113, 5)},
1274     {QMI_FIXED_INTF(0x19d2, 0x0118, 5)},
1275     {QMI_FIXED_INTF(0x19d2, 0x0121, 5)},
1276     {QMI_FIXED_INTF(0x19d2, 0x0123, 4)},
1277     {QMI_FIXED_INTF(0x19d2, 0x0124, 5)},
1278     {QMI_FIXED_INTF(0x19d2, 0x0125, 6)},
1279     {QMI_FIXED_INTF(0x19d2, 0x0126, 5)},
1280     {QMI_FIXED_INTF(0x19d2, 0x0130, 1)},
1281     {QMI_FIXED_INTF(0x19d2, 0x0133, 3)},
1282     {QMI_FIXED_INTF(0x19d2, 0x0141, 5)},
1283     {QMI_FIXED_INTF(0x19d2, 0x0157, 5)},    /* ZTE MF683 */
1284     {QMI_FIXED_INTF(0x19d2, 0x0158, 3)},
1285     {QMI_FIXED_INTF(0x19d2, 0x0167, 4)},    /* ZTE MF820D */
1286     {QMI_FIXED_INTF(0x19d2, 0x0168, 4)},
1287     {QMI_FIXED_INTF(0x19d2, 0x0176, 3)},
1288     {QMI_FIXED_INTF(0x19d2, 0x0178, 3)},
1289     {QMI_FIXED_INTF(0x19d2, 0x0191, 4)},    /* ZTE EuFi890 */
1290     {QMI_FIXED_INTF(0x19d2, 0x0199, 1)},    /* ZTE MF820S */
1291     {QMI_FIXED_INTF(0x19d2, 0x0200, 1)},
1292     {QMI_FIXED_INTF(0x19d2, 0x0257, 3)},    /* ZTE MF821 */
1293     {QMI_FIXED_INTF(0x19d2, 0x0265, 4)},    /* ONDA MT8205 4G LTE */
1294     {QMI_FIXED_INTF(0x19d2, 0x0284, 4)},    /* ZTE MF880 */
1295     {QMI_FIXED_INTF(0x19d2, 0x0326, 4)},    /* ZTE MF821D */
1296     {QMI_FIXED_INTF(0x19d2, 0x0396, 3)},    /* ZTE ZM8620 */
1297     {QMI_FIXED_INTF(0x19d2, 0x0412, 4)},    /* Telewell TW-LTE 4G */
1298     {QMI_FIXED_INTF(0x19d2, 0x1008, 4)},    /* ZTE (Vodafone) K3570-Z */
1299     {QMI_FIXED_INTF(0x19d2, 0x1010, 4)},    /* ZTE (Vodafone) K3571-Z */
1300     {QMI_FIXED_INTF(0x19d2, 0x1012, 4)},
1301     {QMI_FIXED_INTF(0x19d2, 0x1018, 3)},    /* ZTE (Vodafone) K5006-Z */
1302     {QMI_FIXED_INTF(0x19d2, 0x1021, 2)},
1303     {QMI_FIXED_INTF(0x19d2, 0x1245, 4)},
1304     {QMI_FIXED_INTF(0x19d2, 0x1247, 4)},
1305     {QMI_FIXED_INTF(0x19d2, 0x1252, 4)},
1306     {QMI_FIXED_INTF(0x19d2, 0x1254, 4)},
1307     {QMI_FIXED_INTF(0x19d2, 0x1255, 3)},
1308     {QMI_FIXED_INTF(0x19d2, 0x1255, 4)},
1309     {QMI_FIXED_INTF(0x19d2, 0x1256, 4)},
1310     {QMI_FIXED_INTF(0x19d2, 0x1270, 5)},    /* ZTE MF667 */
1311     {QMI_FIXED_INTF(0x19d2, 0x1275, 3)},    /* ZTE P685M */
1312     {QMI_FIXED_INTF(0x19d2, 0x1401, 2)},
1313     {QMI_FIXED_INTF(0x19d2, 0x1402, 2)},    /* ZTE MF60 */
1314     {QMI_FIXED_INTF(0x19d2, 0x1424, 2)},
1315     {QMI_FIXED_INTF(0x19d2, 0x1425, 2)},
1316     {QMI_FIXED_INTF(0x19d2, 0x1426, 2)},    /* ZTE MF91 */
1317     {QMI_FIXED_INTF(0x19d2, 0x1428, 2)},    /* Telewell TW-LTE 4G v2 */
1318     {QMI_FIXED_INTF(0x19d2, 0x1432, 3)},    /* ZTE ME3620 */
1319     {QMI_FIXED_INTF(0x19d2, 0x1485, 5)},    /* ZTE MF286D */
1320     {QMI_FIXED_INTF(0x19d2, 0x2002, 4)},    /* ZTE (Vodafone) K3765-Z */
1321     {QMI_FIXED_INTF(0x2001, 0x7e16, 3)},    /* D-Link DWM-221 */
1322     {QMI_FIXED_INTF(0x2001, 0x7e19, 4)},    /* D-Link DWM-221 B1 */
1323     {QMI_FIXED_INTF(0x2001, 0x7e35, 4)},    /* D-Link DWM-222 */
1324     {QMI_FIXED_INTF(0x2001, 0x7e3d, 4)},    /* D-Link DWM-222 A2 */
1325     {QMI_FIXED_INTF(0x2020, 0x2031, 4)},    /* Olicard 600 */
1326     {QMI_FIXED_INTF(0x2020, 0x2033, 4)},    /* BroadMobi BM806U */
1327     {QMI_FIXED_INTF(0x2020, 0x2060, 4)},    /* BroadMobi BM818 */
1328     {QMI_FIXED_INTF(0x0f3d, 0x68a2, 8)},    /* Sierra Wireless MC7700 */
1329     {QMI_FIXED_INTF(0x114f, 0x68a2, 8)},    /* Sierra Wireless MC7750 */
1330     {QMI_FIXED_INTF(0x1199, 0x68a2, 8)},    /* Sierra Wireless MC7710 in QMI mode */
1331     {QMI_FIXED_INTF(0x1199, 0x68a2, 19)},   /* Sierra Wireless MC7710 in QMI mode */
1332     {QMI_QUIRK_SET_DTR(0x1199, 0x68c0, 8)}, /* Sierra Wireless MC7304/MC7354, WP76xx */
1333     {QMI_QUIRK_SET_DTR(0x1199, 0x68c0, 10)},/* Sierra Wireless MC7304/MC7354 */
1334     {QMI_FIXED_INTF(0x1199, 0x901c, 8)},    /* Sierra Wireless EM7700 */
1335     {QMI_FIXED_INTF(0x1199, 0x901f, 8)},    /* Sierra Wireless EM7355 */
1336     {QMI_FIXED_INTF(0x1199, 0x9041, 8)},    /* Sierra Wireless MC7305/MC7355 */
1337     {QMI_FIXED_INTF(0x1199, 0x9041, 10)},   /* Sierra Wireless MC7305/MC7355 */
1338     {QMI_FIXED_INTF(0x1199, 0x9051, 8)},    /* Netgear AirCard 340U */
1339     {QMI_FIXED_INTF(0x1199, 0x9053, 8)},    /* Sierra Wireless Modem */
1340     {QMI_FIXED_INTF(0x1199, 0x9054, 8)},    /* Sierra Wireless Modem */
1341     {QMI_FIXED_INTF(0x1199, 0x9055, 8)},    /* Netgear AirCard 341U */
1342     {QMI_FIXED_INTF(0x1199, 0x9056, 8)},    /* Sierra Wireless Modem */
1343     {QMI_FIXED_INTF(0x1199, 0x9057, 8)},
1344     {QMI_FIXED_INTF(0x1199, 0x9061, 8)},    /* Sierra Wireless Modem */
1345     {QMI_FIXED_INTF(0x1199, 0x9063, 8)},    /* Sierra Wireless EM7305 */
1346     {QMI_FIXED_INTF(0x1199, 0x9063, 10)},   /* Sierra Wireless EM7305 */
1347     {QMI_QUIRK_SET_DTR(0x1199, 0x9071, 8)}, /* Sierra Wireless MC74xx */
1348     {QMI_QUIRK_SET_DTR(0x1199, 0x9071, 10)},/* Sierra Wireless MC74xx */
1349     {QMI_QUIRK_SET_DTR(0x1199, 0x9079, 8)}, /* Sierra Wireless EM74xx */
1350     {QMI_QUIRK_SET_DTR(0x1199, 0x9079, 10)},/* Sierra Wireless EM74xx */
1351     {QMI_QUIRK_SET_DTR(0x1199, 0x907b, 8)}, /* Sierra Wireless EM74xx */
1352     {QMI_QUIRK_SET_DTR(0x1199, 0x907b, 10)},/* Sierra Wireless EM74xx */
1353     {QMI_QUIRK_SET_DTR(0x1199, 0x9091, 8)}, /* Sierra Wireless EM7565 */
1354     {QMI_QUIRK_SET_DTR(0x1199, 0xc081, 8)}, /* Sierra Wireless EM7590 */
1355     {QMI_FIXED_INTF(0x1bbb, 0x011e, 4)},    /* Telekom Speedstick LTE II (Alcatel One Touch L100V LTE) */
1356     {QMI_FIXED_INTF(0x1bbb, 0x0203, 2)},    /* Alcatel L800MA */
1357     {QMI_FIXED_INTF(0x2357, 0x0201, 4)},    /* TP-LINK HSUPA Modem MA180 */
1358     {QMI_FIXED_INTF(0x2357, 0x9000, 4)},    /* TP-LINK MA260 */
1359     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1031, 3)}, /* Telit LE910C1-EUX */
1360     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1040, 2)}, /* Telit LE922A */
1361     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1050, 2)}, /* Telit FN980 */
1362     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1057, 2)}, /* Telit FN980 */
1363     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1060, 2)}, /* Telit LN920 */
1364     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1070, 2)}, /* Telit FN990 */
1365     {QMI_FIXED_INTF(0x1bc7, 0x1100, 3)},    /* Telit ME910 */
1366     {QMI_FIXED_INTF(0x1bc7, 0x1101, 3)},    /* Telit ME910 dual modem */
1367     {QMI_FIXED_INTF(0x1bc7, 0x1200, 5)},    /* Telit LE920 */
1368     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1201, 2)}, /* Telit LE920, LE920A4 */
1369     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1230, 2)}, /* Telit LE910Cx */
1370     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1250, 0)}, /* Telit LE910Cx */
1371     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1260, 2)}, /* Telit LE910Cx */
1372     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1261, 2)}, /* Telit LE910Cx */
1373     {QMI_QUIRK_SET_DTR(0x1bc7, 0x1900, 1)}, /* Telit LN940 series */
1374     {QMI_FIXED_INTF(0x1c9e, 0x9801, 3)},    /* Telewell TW-3G HSPA+ */
1375     {QMI_FIXED_INTF(0x1c9e, 0x9803, 4)},    /* Telewell TW-3G HSPA+ */
1376     {QMI_FIXED_INTF(0x1c9e, 0x9b01, 3)},    /* XS Stick W100-2 from 4G Systems */
1377     {QMI_FIXED_INTF(0x0b3c, 0xc000, 4)},    /* Olivetti Olicard 100 */
1378     {QMI_FIXED_INTF(0x0b3c, 0xc001, 4)},    /* Olivetti Olicard 120 */
1379     {QMI_FIXED_INTF(0x0b3c, 0xc002, 4)},    /* Olivetti Olicard 140 */
1380     {QMI_FIXED_INTF(0x0b3c, 0xc004, 6)},    /* Olivetti Olicard 155 */
1381     {QMI_FIXED_INTF(0x0b3c, 0xc005, 6)},    /* Olivetti Olicard 200 */
1382     {QMI_FIXED_INTF(0x0b3c, 0xc00a, 6)},    /* Olivetti Olicard 160 */
1383     {QMI_FIXED_INTF(0x0b3c, 0xc00b, 4)},    /* Olivetti Olicard 500 */
1384     {QMI_FIXED_INTF(0x1e2d, 0x0060, 4)},    /* Cinterion PLxx */
1385     {QMI_QUIRK_SET_DTR(0x1e2d, 0x006f, 8)}, /* Cinterion PLS83/PLS63 */
1386     {QMI_FIXED_INTF(0x1e2d, 0x0053, 4)},    /* Cinterion PHxx,PXxx */
1387     {QMI_FIXED_INTF(0x1e2d, 0x0063, 10)},   /* Cinterion ALASxx (1 RmNet) */
1388     {QMI_FIXED_INTF(0x1e2d, 0x0082, 4)},    /* Cinterion PHxx,PXxx (2 RmNet) */
1389     {QMI_FIXED_INTF(0x1e2d, 0x0082, 5)},    /* Cinterion PHxx,PXxx (2 RmNet) */
1390     {QMI_FIXED_INTF(0x1e2d, 0x0083, 4)},    /* Cinterion PHxx,PXxx (1 RmNet + USB Audio)*/
1391     {QMI_QUIRK_SET_DTR(0x1e2d, 0x00b0, 4)}, /* Cinterion CLS8 */
1392     {QMI_FIXED_INTF(0x1e2d, 0x00b7, 0)},    /* Cinterion MV31 RmNet */
1393     {QMI_FIXED_INTF(0x1e2d, 0x00b9, 0)},    /* Cinterion MV31 RmNet based on new baseline */
1394     {QMI_FIXED_INTF(0x1e2d, 0x00f3, 0)},    /* Cinterion MV32-W-A RmNet */
1395     {QMI_FIXED_INTF(0x1e2d, 0x00f4, 0)},    /* Cinterion MV32-W-B RmNet */
1396     {QMI_FIXED_INTF(0x413c, 0x81a2, 8)},    /* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
1397     {QMI_FIXED_INTF(0x413c, 0x81a3, 8)},    /* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
1398     {QMI_FIXED_INTF(0x413c, 0x81a4, 8)},    /* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */
1399     {QMI_FIXED_INTF(0x413c, 0x81a8, 8)},    /* Dell Wireless 5808 Gobi(TM) 4G LTE Mobile Broadband Card */
1400     {QMI_FIXED_INTF(0x413c, 0x81a9, 8)},    /* Dell Wireless 5808e Gobi(TM) 4G LTE Mobile Broadband Card */
1401     {QMI_FIXED_INTF(0x413c, 0x81b1, 8)},    /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card */
1402     {QMI_FIXED_INTF(0x413c, 0x81b3, 8)},    /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card (rev3) */
1403     {QMI_FIXED_INTF(0x413c, 0x81b6, 8)},    /* Dell Wireless 5811e */
1404     {QMI_FIXED_INTF(0x413c, 0x81b6, 10)},   /* Dell Wireless 5811e */
1405     {QMI_FIXED_INTF(0x413c, 0x81c2, 8)},    /* Dell Wireless 5811e */
1406     {QMI_FIXED_INTF(0x413c, 0x81cc, 8)},    /* Dell Wireless 5816e */
1407     {QMI_FIXED_INTF(0x413c, 0x81d7, 0)},    /* Dell Wireless 5821e */
1408     {QMI_FIXED_INTF(0x413c, 0x81d7, 1)},    /* Dell Wireless 5821e preproduction config */
1409     {QMI_FIXED_INTF(0x413c, 0x81e0, 0)},    /* Dell Wireless 5821e with eSIM support*/
1410     {QMI_FIXED_INTF(0x413c, 0x81e4, 0)},    /* Dell Wireless 5829e with eSIM support*/
1411     {QMI_FIXED_INTF(0x413c, 0x81e6, 0)},    /* Dell Wireless 5829e */
1412     {QMI_FIXED_INTF(0x03f0, 0x4e1d, 8)},    /* HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module */
1413     {QMI_FIXED_INTF(0x03f0, 0x9d1d, 1)},    /* HP lt4120 Snapdragon X5 LTE */
1414     {QMI_QUIRK_SET_DTR(0x22de, 0x9051, 2)}, /* Hucom Wireless HM-211S/K */
1415     {QMI_FIXED_INTF(0x22de, 0x9061, 3)},    /* WeTelecom WPD-600N */
1416     {QMI_QUIRK_SET_DTR(0x1e0e, 0x9001, 5)}, /* SIMCom 7100E, 7230E, 7600E ++ */
1417     {QMI_QUIRK_SET_DTR(0x2c7c, 0x0121, 4)}, /* Quectel EC21 Mini PCIe */
1418     {QMI_QUIRK_SET_DTR(0x2c7c, 0x0191, 4)}, /* Quectel EG91 */
1419     {QMI_QUIRK_SET_DTR(0x2c7c, 0x0195, 4)}, /* Quectel EG95 */
1420     {QMI_FIXED_INTF(0x2c7c, 0x0296, 4)},    /* Quectel BG96 */
1421     {QMI_QUIRK_SET_DTR(0x2cb7, 0x0104, 4)}, /* Fibocom NL678 series */
1422     {QMI_FIXED_INTF(0x0489, 0xe0b4, 0)},    /* Foxconn T77W968 LTE */
1423     {QMI_FIXED_INTF(0x0489, 0xe0b5, 0)},    /* Foxconn T77W968 LTE with eSIM support*/
1424     {QMI_FIXED_INTF(0x2692, 0x9025, 4)},    /* Cellient MPL200 (rebranded Qualcomm 05c6:9025) */
1425 
1426     /* 4. Gobi 1000 devices */
1427     {QMI_GOBI1K_DEVICE(0x05c6, 0x9212)},    /* Acer Gobi Modem Device */
1428     {QMI_GOBI1K_DEVICE(0x03f0, 0x1f1d)},    /* HP un2400 Gobi Modem Device */
1429     {QMI_GOBI1K_DEVICE(0x04da, 0x250d)},    /* Panasonic Gobi Modem device */
1430     {QMI_GOBI1K_DEVICE(0x413c, 0x8172)},    /* Dell Gobi Modem device */
1431     {QMI_GOBI1K_DEVICE(0x1410, 0xa001)},    /* Novatel/Verizon USB-1000 */
1432     {QMI_GOBI1K_DEVICE(0x1410, 0xa002)},    /* Novatel Gobi Modem device */
1433     {QMI_GOBI1K_DEVICE(0x1410, 0xa003)},    /* Novatel Gobi Modem device */
1434     {QMI_GOBI1K_DEVICE(0x1410, 0xa004)},    /* Novatel Gobi Modem device */
1435     {QMI_GOBI1K_DEVICE(0x1410, 0xa005)},    /* Novatel Gobi Modem device */
1436     {QMI_GOBI1K_DEVICE(0x1410, 0xa006)},    /* Novatel Gobi Modem device */
1437     {QMI_GOBI1K_DEVICE(0x1410, 0xa007)},    /* Novatel Gobi Modem device */
1438     {QMI_GOBI1K_DEVICE(0x0b05, 0x1776)},    /* Asus Gobi Modem device */
1439     {QMI_GOBI1K_DEVICE(0x19d2, 0xfff3)},    /* ONDA Gobi Modem device */
1440     {QMI_GOBI1K_DEVICE(0x05c6, 0x9001)},    /* Generic Gobi Modem device */
1441     {QMI_GOBI1K_DEVICE(0x05c6, 0x9002)},    /* Generic Gobi Modem device */
1442     {QMI_GOBI1K_DEVICE(0x05c6, 0x9202)},    /* Generic Gobi Modem device */
1443     {QMI_GOBI1K_DEVICE(0x05c6, 0x9203)},    /* Generic Gobi Modem device */
1444     {QMI_GOBI1K_DEVICE(0x05c6, 0x9222)},    /* Generic Gobi Modem device */
1445     {QMI_GOBI1K_DEVICE(0x05c6, 0x9009)},    /* Generic Gobi Modem device */
1446 
1447     /* 5. Gobi 2000 and 3000 devices */
1448     {QMI_GOBI_DEVICE(0x413c, 0x8186)},  /* Dell Gobi 2000 Modem device (N0218, VU936) */
1449     {QMI_GOBI_DEVICE(0x413c, 0x8194)},  /* Dell Gobi 3000 Composite */
1450     {QMI_GOBI_DEVICE(0x05c6, 0x920b)},  /* Generic Gobi 2000 Modem device */
1451     {QMI_GOBI_DEVICE(0x05c6, 0x9225)},  /* Sony Gobi 2000 Modem device (N0279, VU730) */
1452     {QMI_GOBI_DEVICE(0x05c6, 0x9245)},  /* Samsung Gobi 2000 Modem device (VL176) */
1453     {QMI_GOBI_DEVICE(0x03f0, 0x251d)},  /* HP Gobi 2000 Modem device (VP412) */
1454     {QMI_GOBI_DEVICE(0x05c6, 0x9215)},  /* Acer Gobi 2000 Modem device (VP413) */
1455     {QMI_FIXED_INTF(0x05c6, 0x9215, 4)},    /* Quectel EC20 Mini PCIe */
1456     {QMI_GOBI_DEVICE(0x05c6, 0x9265)},  /* Asus Gobi 2000 Modem device (VR305) */
1457     {QMI_GOBI_DEVICE(0x05c6, 0x9235)},  /* Top Global Gobi 2000 Modem device (VR306) */
1458     {QMI_GOBI_DEVICE(0x05c6, 0x9275)},  /* iRex Technologies Gobi 2000 Modem device (VR307) */
1459     {QMI_GOBI_DEVICE(0x0af0, 0x8120)},  /* Option GTM681W */
1460     {QMI_GOBI_DEVICE(0x1199, 0x68a5)},  /* Sierra Wireless Modem */
1461     {QMI_GOBI_DEVICE(0x1199, 0x68a9)},  /* Sierra Wireless Modem */
1462     {QMI_GOBI_DEVICE(0x1199, 0x9001)},  /* Sierra Wireless Gobi 2000 Modem device (VT773) */
1463     {QMI_GOBI_DEVICE(0x1199, 0x9002)},  /* Sierra Wireless Gobi 2000 Modem device (VT773) */
1464     {QMI_GOBI_DEVICE(0x1199, 0x9003)},  /* Sierra Wireless Gobi 2000 Modem device (VT773) */
1465     {QMI_GOBI_DEVICE(0x1199, 0x9004)},  /* Sierra Wireless Gobi 2000 Modem device (VT773) */
1466     {QMI_GOBI_DEVICE(0x1199, 0x9005)},  /* Sierra Wireless Gobi 2000 Modem device (VT773) */
1467     {QMI_GOBI_DEVICE(0x1199, 0x9006)},  /* Sierra Wireless Gobi 2000 Modem device (VT773) */
1468     {QMI_GOBI_DEVICE(0x1199, 0x9007)},  /* Sierra Wireless Gobi 2000 Modem device (VT773) */
1469     {QMI_GOBI_DEVICE(0x1199, 0x9008)},  /* Sierra Wireless Gobi 2000 Modem device (VT773) */
1470     {QMI_GOBI_DEVICE(0x1199, 0x9009)},  /* Sierra Wireless Gobi 2000 Modem device (VT773) */
1471     {QMI_GOBI_DEVICE(0x1199, 0x900a)},  /* Sierra Wireless Gobi 2000 Modem device (VT773) */
1472     {QMI_GOBI_DEVICE(0x1199, 0x9011)},  /* Sierra Wireless Gobi 2000 Modem device (MC8305) */
1473     {QMI_GOBI_DEVICE(0x16d8, 0x8002)},  /* CMDTech Gobi 2000 Modem device (VU922) */
1474     {QMI_GOBI_DEVICE(0x05c6, 0x9205)},  /* Gobi 2000 Modem device */
1475     {QMI_GOBI_DEVICE(0x1199, 0x9013)},  /* Sierra Wireless Gobi 3000 Modem device (MC8355) */
1476     {QMI_GOBI_DEVICE(0x03f0, 0x371d)},  /* HP un2430 Mobile Broadband Module */
1477     {QMI_GOBI_DEVICE(0x1199, 0x9015)},  /* Sierra Wireless Gobi 3000 Modem device */
1478     {QMI_GOBI_DEVICE(0x1199, 0x9019)},  /* Sierra Wireless Gobi 3000 Modem device */
1479     {QMI_GOBI_DEVICE(0x1199, 0x901b)},  /* Sierra Wireless MC7770 */
1480     {QMI_GOBI_DEVICE(0x12d1, 0x14f1)},  /* Sony Gobi 3000 Composite */
1481     {QMI_GOBI_DEVICE(0x1410, 0xa021)},  /* Foxconn Gobi 3000 Modem device (Novatel E396) */
1482 
1483     { }                 /* END */
1484 };
1485 MODULE_DEVICE_TABLE(usb, products);
1486 
1487 static bool quectel_ec20_detected(struct usb_interface *intf)
1488 {
1489     struct usb_device *dev = interface_to_usbdev(intf);
1490 
1491     if (dev->actconfig &&
1492         le16_to_cpu(dev->descriptor.idVendor) == 0x05c6 &&
1493         le16_to_cpu(dev->descriptor.idProduct) == 0x9215 &&
1494         dev->actconfig->desc.bNumInterfaces == 5)
1495         return true;
1496 
1497     return false;
1498 }
1499 
1500 static int qmi_wwan_probe(struct usb_interface *intf,
1501               const struct usb_device_id *prod)
1502 {
1503     struct usb_device_id *id = (struct usb_device_id *)prod;
1504     struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
1505 
1506     /* Workaround to enable dynamic IDs.  This disables usbnet
1507      * blacklisting functionality.  Which, if required, can be
1508      * reimplemented here by using a magic "blacklist" value
1509      * instead of 0 in the static device id table
1510      */
1511     if (!id->driver_info) {
1512         dev_dbg(&intf->dev, "setting defaults for dynamic device id\n");
1513         id->driver_info = (unsigned long)&qmi_wwan_info;
1514     }
1515 
1516     /* There are devices where the same interface number can be
1517      * configured as different functions. We should only bind to
1518      * vendor specific functions when matching on interface number
1519      */
1520     if (id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER &&
1521         desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) {
1522         dev_dbg(&intf->dev,
1523             "Rejecting interface number match for class %02x\n",
1524             desc->bInterfaceClass);
1525         return -ENODEV;
1526     }
1527 
1528     /* Quectel EC20 quirk where we've QMI on interface 4 instead of 0 */
1529     if (quectel_ec20_detected(intf) && desc->bInterfaceNumber == 0) {
1530         dev_dbg(&intf->dev, "Quectel EC20 quirk, skipping interface 0\n");
1531         return -ENODEV;
1532     }
1533 
1534     /* Several Quectel modems supports dynamic interface configuration, so
1535      * we need to match on class/subclass/protocol. These values are
1536      * identical for the diagnostic- and QMI-interface, but bNumEndpoints is
1537      * different. Ignore the current interface if the number of endpoints
1538      * equals the number for the diag interface (two).
1539      */
1540     if (desc->bNumEndpoints == 2)
1541         return -ENODEV;
1542 
1543     return usbnet_probe(intf, id);
1544 }
1545 
1546 static void qmi_wwan_disconnect(struct usb_interface *intf)
1547 {
1548     struct usbnet *dev = usb_get_intfdata(intf);
1549     struct qmi_wwan_state *info;
1550     struct list_head *iter;
1551     struct net_device *ldev;
1552     LIST_HEAD(list);
1553 
1554     /* called twice if separate control and data intf */
1555     if (!dev)
1556         return;
1557     info = (void *)&dev->data;
1558     if (info->flags & QMI_WWAN_FLAG_MUX) {
1559         if (!rtnl_trylock()) {
1560             restart_syscall();
1561             return;
1562         }
1563         rcu_read_lock();
1564         netdev_for_each_upper_dev_rcu(dev->net, ldev, iter)
1565             qmimux_unregister_device(ldev, &list);
1566         rcu_read_unlock();
1567         unregister_netdevice_many(&list);
1568         rtnl_unlock();
1569         info->flags &= ~QMI_WWAN_FLAG_MUX;
1570     }
1571     usbnet_disconnect(intf);
1572 }
1573 
1574 static struct usb_driver qmi_wwan_driver = {
1575     .name             = "qmi_wwan",
1576     .id_table         = products,
1577     .probe            = qmi_wwan_probe,
1578     .disconnect       = qmi_wwan_disconnect,
1579     .suspend          = qmi_wwan_suspend,
1580     .resume           = qmi_wwan_resume,
1581     .reset_resume         = qmi_wwan_resume,
1582     .supports_autosuspend = 1,
1583     .disable_hub_initiated_lpm = 1,
1584 };
1585 
1586 module_usb_driver(qmi_wwan_driver);
1587 
1588 MODULE_AUTHOR("Bjørn Mork <bjorn@mork.no>");
1589 MODULE_DESCRIPTION("Qualcomm MSM Interface (QMI) WWAN driver");
1590 MODULE_LICENSE("GPL");
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