483 lines
17 KiB
C
483 lines
17 KiB
C
/*
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* Copyright (c) 2012 Bjørn Mork <bjorn@mork.no>
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*
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* The probing code is heavily inspired by cdc_ether, which is:
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* Copyright (C) 2003-2005 by David Brownell
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* Copyright (C) 2006 by Ole Andre Vadla Ravnas (ActiveSync)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/ethtool.h>
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#include <linux/mii.h>
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#include <linux/usb.h>
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#include <linux/usb/cdc.h>
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#include <linux/usb/usbnet.h>
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#include <linux/usb/cdc-wdm.h>
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/* This driver supports wwan (3G/LTE/?) devices using a vendor
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* specific management protocol called Qualcomm MSM Interface (QMI) -
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* in addition to the more common AT commands over serial interface
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* management
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*
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* QMI is wrapped in CDC, using CDC encapsulated commands on the
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* control ("master") interface of a two-interface CDC Union
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* resembling standard CDC ECM. The devices do not use the control
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* interface for any other CDC messages. Most likely because the
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* management protocol is used in place of the standard CDC
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* notifications NOTIFY_NETWORK_CONNECTION and NOTIFY_SPEED_CHANGE
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*
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* Alternatively, control and data functions can be combined in a
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* single USB interface.
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*
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* Handling a protocol like QMI is out of the scope for any driver.
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* It is exported as a character device using the cdc-wdm driver as
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* a subdriver, enabling userspace applications ("modem managers") to
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* handle it.
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*
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* These devices may alternatively/additionally be configured using AT
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* commands on a serial interface
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*/
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/* driver specific data */
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struct qmi_wwan_state {
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struct usb_driver *subdriver;
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atomic_t pmcount;
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unsigned long unused;
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struct usb_interface *control;
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struct usb_interface *data;
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};
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/* using a counter to merge subdriver requests with our own into a combined state */
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static int qmi_wwan_manage_power(struct usbnet *dev, int on)
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{
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struct qmi_wwan_state *info = (void *)&dev->data;
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int rv = 0;
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dev_dbg(&dev->intf->dev, "%s() pmcount=%d, on=%d\n", __func__, atomic_read(&info->pmcount), on);
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if ((on && atomic_add_return(1, &info->pmcount) == 1) || (!on && atomic_dec_and_test(&info->pmcount))) {
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/* need autopm_get/put here to ensure the usbcore sees the new value */
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rv = usb_autopm_get_interface(dev->intf);
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if (rv < 0)
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goto err;
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dev->intf->needs_remote_wakeup = on;
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usb_autopm_put_interface(dev->intf);
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}
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err:
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return rv;
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}
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static int qmi_wwan_cdc_wdm_manage_power(struct usb_interface *intf, int on)
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{
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struct usbnet *dev = usb_get_intfdata(intf);
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/* can be called while disconnecting */
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if (!dev)
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return 0;
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return qmi_wwan_manage_power(dev, on);
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}
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/* collect all three endpoints and register subdriver */
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static int qmi_wwan_register_subdriver(struct usbnet *dev)
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{
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int rv;
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struct usb_driver *subdriver = NULL;
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struct qmi_wwan_state *info = (void *)&dev->data;
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/* collect bulk endpoints */
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rv = usbnet_get_endpoints(dev, info->data);
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if (rv < 0)
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goto err;
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/* update status endpoint if separate control interface */
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if (info->control != info->data)
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dev->status = &info->control->cur_altsetting->endpoint[0];
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/* require interrupt endpoint for subdriver */
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if (!dev->status) {
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rv = -EINVAL;
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goto err;
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}
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/* for subdriver power management */
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atomic_set(&info->pmcount, 0);
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/* register subdriver */
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subdriver = usb_cdc_wdm_register(info->control, &dev->status->desc, 512, &qmi_wwan_cdc_wdm_manage_power);
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if (IS_ERR(subdriver)) {
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dev_err(&info->control->dev, "subdriver registration failed\n");
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rv = PTR_ERR(subdriver);
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goto err;
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}
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/* prevent usbnet from using status endpoint */
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dev->status = NULL;
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/* save subdriver struct for suspend/resume wrappers */
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info->subdriver = subdriver;
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err:
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return rv;
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}
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static int qmi_wwan_bind(struct usbnet *dev, struct usb_interface *intf)
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{
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int status = -1;
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u8 *buf = intf->cur_altsetting->extra;
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int len = intf->cur_altsetting->extralen;
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struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
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struct usb_cdc_union_desc *cdc_union = NULL;
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struct usb_cdc_ether_desc *cdc_ether = NULL;
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u32 found = 0;
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struct usb_driver *driver = driver_of(intf);
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struct qmi_wwan_state *info = (void *)&dev->data;
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BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data) < sizeof(struct qmi_wwan_state)));
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/* require a single interrupt status endpoint for subdriver */
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if (intf->cur_altsetting->desc.bNumEndpoints != 1)
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goto err;
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while (len > 3) {
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struct usb_descriptor_header *h = (void *)buf;
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/* ignore any misplaced descriptors */
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if (h->bDescriptorType != USB_DT_CS_INTERFACE)
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goto next_desc;
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/* buf[2] is CDC descriptor subtype */
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switch (buf[2]) {
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case USB_CDC_HEADER_TYPE:
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if (found & 1 << USB_CDC_HEADER_TYPE) {
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dev_dbg(&intf->dev, "extra CDC header\n");
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goto err;
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}
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if (h->bLength != sizeof(struct usb_cdc_header_desc)) {
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dev_dbg(&intf->dev, "CDC header len %u\n", h->bLength);
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goto err;
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}
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break;
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case USB_CDC_UNION_TYPE:
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if (found & 1 << USB_CDC_UNION_TYPE) {
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dev_dbg(&intf->dev, "extra CDC union\n");
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goto err;
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}
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if (h->bLength != sizeof(struct usb_cdc_union_desc)) {
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dev_dbg(&intf->dev, "CDC union len %u\n", h->bLength);
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goto err;
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}
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cdc_union = (struct usb_cdc_union_desc *)buf;
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break;
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case USB_CDC_ETHERNET_TYPE:
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if (found & 1 << USB_CDC_ETHERNET_TYPE) {
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dev_dbg(&intf->dev, "extra CDC ether\n");
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goto err;
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}
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if (h->bLength != sizeof(struct usb_cdc_ether_desc)) {
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dev_dbg(&intf->dev, "CDC ether len %u\n", h->bLength);
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goto err;
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}
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cdc_ether = (struct usb_cdc_ether_desc *)buf;
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break;
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}
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/*
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* Remember which CDC functional descriptors we've seen. Works
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* for all types we care about, of which USB_CDC_ETHERNET_TYPE
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* (0x0f) is the highest numbered
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*/
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if (buf[2] < 32)
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found |= 1 << buf[2];
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next_desc:
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len -= h->bLength;
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buf += h->bLength;
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}
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/* did we find all the required ones? */
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if (!(found & (1 << USB_CDC_HEADER_TYPE)) ||
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!(found & (1 << USB_CDC_UNION_TYPE))) {
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dev_err(&intf->dev, "CDC functional descriptors missing\n");
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goto err;
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}
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/* verify CDC Union */
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if (desc->bInterfaceNumber != cdc_union->bMasterInterface0) {
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dev_err(&intf->dev, "bogus CDC Union: master=%u\n", cdc_union->bMasterInterface0);
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goto err;
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}
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/* need to save these for unbind */
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info->control = intf;
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info->data = usb_ifnum_to_if(dev->udev, cdc_union->bSlaveInterface0);
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if (!info->data) {
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dev_err(&intf->dev, "bogus CDC Union: slave=%u\n", cdc_union->bSlaveInterface0);
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goto err;
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}
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/* errors aren't fatal - we can live with the dynamic address */
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if (cdc_ether) {
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dev->hard_mtu = le16_to_cpu(cdc_ether->wMaxSegmentSize);
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usbnet_get_ethernet_addr(dev, cdc_ether->iMACAddress);
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}
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/* claim data interface and set it up */
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status = usb_driver_claim_interface(driver, info->data, dev);
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if (status < 0)
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goto err;
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status = qmi_wwan_register_subdriver(dev);
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if (status < 0) {
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usb_set_intfdata(info->data, NULL);
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usb_driver_release_interface(driver, info->data);
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}
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err:
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return status;
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}
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/* Some devices combine the "control" and "data" functions into a
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* single interface with all three endpoints: interrupt + bulk in and
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* out
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*/
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static int qmi_wwan_bind_shared(struct usbnet *dev, struct usb_interface *intf)
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{
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struct qmi_wwan_state *info = (void *)&dev->data;
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/* control and data is shared */
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info->control = intf;
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info->data = intf;
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return qmi_wwan_register_subdriver(dev);
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}
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static void qmi_wwan_unbind(struct usbnet *dev, struct usb_interface *intf)
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{
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struct qmi_wwan_state *info = (void *)&dev->data;
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struct usb_driver *driver = driver_of(intf);
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struct usb_interface *other;
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if (info->subdriver && info->subdriver->disconnect)
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info->subdriver->disconnect(info->control);
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/* allow user to unbind using either control or data */
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if (intf == info->control)
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other = info->data;
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else
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other = info->control;
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/* only if not shared */
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if (other && intf != other) {
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usb_set_intfdata(other, NULL);
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usb_driver_release_interface(driver, other);
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}
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info->subdriver = NULL;
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info->data = NULL;
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info->control = NULL;
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}
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/* suspend/resume wrappers calling both usbnet and the cdc-wdm
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* subdriver if present.
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*
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* NOTE: cdc-wdm also supports pre/post_reset, but we cannot provide
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* wrappers for those without adding usbnet reset support first.
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*/
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static int qmi_wwan_suspend(struct usb_interface *intf, pm_message_t message)
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{
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struct usbnet *dev = usb_get_intfdata(intf);
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struct qmi_wwan_state *info = (void *)&dev->data;
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int ret;
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ret = usbnet_suspend(intf, message);
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if (ret < 0)
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goto err;
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if (info->subdriver && info->subdriver->suspend)
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ret = info->subdriver->suspend(intf, message);
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if (ret < 0)
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usbnet_resume(intf);
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err:
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return ret;
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}
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static int qmi_wwan_resume(struct usb_interface *intf)
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{
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struct usbnet *dev = usb_get_intfdata(intf);
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struct qmi_wwan_state *info = (void *)&dev->data;
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int ret = 0;
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if (info->subdriver && info->subdriver->resume)
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ret = info->subdriver->resume(intf);
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if (ret < 0)
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goto err;
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ret = usbnet_resume(intf);
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if (ret < 0 && info->subdriver && info->subdriver->resume && info->subdriver->suspend)
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info->subdriver->suspend(intf, PMSG_SUSPEND);
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err:
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return ret;
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}
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static const struct driver_info qmi_wwan_info = {
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.description = "WWAN/QMI device",
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.flags = FLAG_WWAN,
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.bind = qmi_wwan_bind,
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.unbind = qmi_wwan_unbind,
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.manage_power = qmi_wwan_manage_power,
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};
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static const struct driver_info qmi_wwan_shared = {
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.description = "WWAN/QMI device",
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.flags = FLAG_WWAN,
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.bind = qmi_wwan_bind_shared,
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.unbind = qmi_wwan_unbind,
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.manage_power = qmi_wwan_manage_power,
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};
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#define HUAWEI_VENDOR_ID 0x12D1
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/* map QMI/wwan function by a fixed interface number */
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#define QMI_FIXED_INTF(vend, prod, num) \
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USB_DEVICE_INTERFACE_NUMBER(vend, prod, num), \
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.driver_info = (unsigned long)&qmi_wwan_shared
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/* Gobi 1000 QMI/wwan interface number is 3 according to qcserial */
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#define QMI_GOBI1K_DEVICE(vend, prod) \
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QMI_FIXED_INTF(vend, prod, 3)
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/* Gobi 2000/3000 QMI/wwan interface number is 0 according to qcserial */
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#define QMI_GOBI_DEVICE(vend, prod) \
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QMI_FIXED_INTF(vend, prod, 0)
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static const struct usb_device_id products[] = {
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/* 1. CDC ECM like devices match on the control interface */
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{ /* Huawei E392, E398 and possibly others sharing both device id and more... */
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USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 9),
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.driver_info = (unsigned long)&qmi_wwan_info,
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},
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{ /* Vodafone/Huawei K5005 (12d1:14c8) and similar modems */
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USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 57),
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.driver_info = (unsigned long)&qmi_wwan_info,
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},
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/* 2. Combined interface devices matching on class+protocol */
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{ /* Huawei E392, E398 and possibly others in "Windows mode" */
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USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 17),
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.driver_info = (unsigned long)&qmi_wwan_shared,
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},
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{ /* Pantech UML290 */
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USB_DEVICE_AND_INTERFACE_INFO(0x106c, 0x3718, USB_CLASS_VENDOR_SPEC, 0xf0, 0xff),
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.driver_info = (unsigned long)&qmi_wwan_shared,
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},
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{ /* Pantech UML290 - newer firmware */
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USB_DEVICE_AND_INTERFACE_INFO(0x106c, 0x3718, USB_CLASS_VENDOR_SPEC, 0xf1, 0xff),
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.driver_info = (unsigned long)&qmi_wwan_shared,
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},
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/* 3. Combined interface devices matching on interface number */
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{QMI_FIXED_INTF(0x19d2, 0x0055, 1)}, /* ZTE (Vodafone) K3520-Z */
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{QMI_FIXED_INTF(0x19d2, 0x0063, 4)}, /* ZTE (Vodafone) K3565-Z */
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{QMI_FIXED_INTF(0x19d2, 0x0104, 4)}, /* ZTE (Vodafone) K4505-Z */
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{QMI_FIXED_INTF(0x19d2, 0x0167, 4)}, /* ZTE MF820D */
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{QMI_FIXED_INTF(0x19d2, 0x0326, 4)}, /* ZTE MF821D */
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{QMI_FIXED_INTF(0x19d2, 0x1008, 4)}, /* ZTE (Vodafone) K3570-Z */
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{QMI_FIXED_INTF(0x19d2, 0x1010, 4)}, /* ZTE (Vodafone) K3571-Z */
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{QMI_FIXED_INTF(0x19d2, 0x1018, 3)}, /* ZTE (Vodafone) K5006-Z */
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{QMI_FIXED_INTF(0x19d2, 0x1402, 2)}, /* ZTE MF60 */
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{QMI_FIXED_INTF(0x19d2, 0x2002, 4)}, /* ZTE (Vodafone) K3765-Z */
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{QMI_FIXED_INTF(0x0f3d, 0x68a2, 8)}, /* Sierra Wireless MC7700 */
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{QMI_FIXED_INTF(0x114f, 0x68a2, 8)}, /* Sierra Wireless MC7750 */
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{QMI_FIXED_INTF(0x1199, 0x68a2, 8)}, /* Sierra Wireless MC7710 in QMI mode */
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{QMI_FIXED_INTF(0x1199, 0x68a2, 19)}, /* Sierra Wireless MC7710 in QMI mode */
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{QMI_FIXED_INTF(0x1199, 0x901c, 8)}, /* Sierra Wireless EM7700 */
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/* 4. Gobi 1000 devices */
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{QMI_GOBI1K_DEVICE(0x05c6, 0x9212)}, /* Acer Gobi Modem Device */
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{QMI_GOBI1K_DEVICE(0x03f0, 0x1f1d)}, /* HP un2400 Gobi Modem Device */
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{QMI_GOBI1K_DEVICE(0x03f0, 0x371d)}, /* HP un2430 Mobile Broadband Module */
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{QMI_GOBI1K_DEVICE(0x04da, 0x250d)}, /* Panasonic Gobi Modem device */
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{QMI_GOBI1K_DEVICE(0x413c, 0x8172)}, /* Dell Gobi Modem device */
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{QMI_GOBI1K_DEVICE(0x1410, 0xa001)}, /* Novatel Gobi Modem device */
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{QMI_GOBI1K_DEVICE(0x0b05, 0x1776)}, /* Asus Gobi Modem device */
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{QMI_GOBI1K_DEVICE(0x19d2, 0xfff3)}, /* ONDA Gobi Modem device */
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{QMI_GOBI1K_DEVICE(0x05c6, 0x9001)}, /* Generic Gobi Modem device */
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{QMI_GOBI1K_DEVICE(0x05c6, 0x9002)}, /* Generic Gobi Modem device */
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{QMI_GOBI1K_DEVICE(0x05c6, 0x9202)}, /* Generic Gobi Modem device */
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{QMI_GOBI1K_DEVICE(0x05c6, 0x9203)}, /* Generic Gobi Modem device */
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{QMI_GOBI1K_DEVICE(0x05c6, 0x9222)}, /* Generic Gobi Modem device */
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{QMI_GOBI1K_DEVICE(0x05c6, 0x9009)}, /* Generic Gobi Modem device */
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/* 5. Gobi 2000 and 3000 devices */
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{QMI_GOBI_DEVICE(0x413c, 0x8186)}, /* Dell Gobi 2000 Modem device (N0218, VU936) */
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{QMI_GOBI_DEVICE(0x05c6, 0x920b)}, /* Generic Gobi 2000 Modem device */
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{QMI_GOBI_DEVICE(0x05c6, 0x9225)}, /* Sony Gobi 2000 Modem device (N0279, VU730) */
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{QMI_GOBI_DEVICE(0x05c6, 0x9245)}, /* Samsung Gobi 2000 Modem device (VL176) */
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{QMI_GOBI_DEVICE(0x03f0, 0x251d)}, /* HP Gobi 2000 Modem device (VP412) */
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{QMI_GOBI_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) */
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{QMI_GOBI_DEVICE(0x05c6, 0x9265)}, /* Asus Gobi 2000 Modem device (VR305) */
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{QMI_GOBI_DEVICE(0x05c6, 0x9235)}, /* Top Global Gobi 2000 Modem device (VR306) */
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{QMI_GOBI_DEVICE(0x05c6, 0x9275)}, /* iRex Technologies Gobi 2000 Modem device (VR307) */
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{QMI_GOBI_DEVICE(0x1199, 0x68a5)}, /* Sierra Wireless Modem */
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{QMI_GOBI_DEVICE(0x1199, 0x68a9)}, /* Sierra Wireless Modem */
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{QMI_GOBI_DEVICE(0x1199, 0x9001)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
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{QMI_GOBI_DEVICE(0x1199, 0x9002)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9003)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9004)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9005)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9006)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9007)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9008)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9009)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x900a)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9011)}, /* Sierra Wireless Gobi 2000 Modem device (MC8305) */
|
|
{QMI_FIXED_INTF(0x1199, 0x9011, 5)}, /* alternate interface number!? */
|
|
{QMI_GOBI_DEVICE(0x16d8, 0x8002)}, /* CMDTech Gobi 2000 Modem device (VU922) */
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9205)}, /* Gobi 2000 Modem device */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9013)}, /* Sierra Wireless Gobi 3000 Modem device (MC8355) */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9015)}, /* Sierra Wireless Gobi 3000 Modem device */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9019)}, /* Sierra Wireless Gobi 3000 Modem device */
|
|
{QMI_GOBI_DEVICE(0x1199, 0x901b)}, /* Sierra Wireless MC7770 */
|
|
|
|
{ } /* END */
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, products);
|
|
|
|
static int qmi_wwan_probe(struct usb_interface *intf, const struct usb_device_id *prod)
|
|
{
|
|
struct usb_device_id *id = (struct usb_device_id *)prod;
|
|
|
|
/* Workaround to enable dynamic IDs. This disables usbnet
|
|
* blacklisting functionality. Which, if required, can be
|
|
* reimplemented here by using a magic "blacklist" value
|
|
* instead of 0 in the static device id table
|
|
*/
|
|
if (!id->driver_info) {
|
|
dev_dbg(&intf->dev, "setting defaults for dynamic device id\n");
|
|
id->driver_info = (unsigned long)&qmi_wwan_shared;
|
|
}
|
|
|
|
return usbnet_probe(intf, id);
|
|
}
|
|
|
|
static struct usb_driver qmi_wwan_driver = {
|
|
.name = "qmi_wwan",
|
|
.id_table = products,
|
|
.probe = qmi_wwan_probe,
|
|
.disconnect = usbnet_disconnect,
|
|
.suspend = qmi_wwan_suspend,
|
|
.resume = qmi_wwan_resume,
|
|
.reset_resume = qmi_wwan_resume,
|
|
.supports_autosuspend = 1,
|
|
.disable_hub_initiated_lpm = 1,
|
|
};
|
|
|
|
module_usb_driver(qmi_wwan_driver);
|
|
|
|
MODULE_AUTHOR("Bjørn Mork <bjorn@mork.no>");
|
|
MODULE_DESCRIPTION("Qualcomm MSM Interface (QMI) WWAN driver");
|
|
MODULE_LICENSE("GPL");
|