2012-01-19 23:37:22 +08:00
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/*
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* Copyright (c) 2012 Bjørn Mork <bjorn@mork.no>
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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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2012-03-09 19:35:05 +08:00
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#include <linux/usb/cdc-wdm.h>
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2012-01-19 23:37:22 +08:00
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/* The name of the CDC Device Management driver */
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#define DM_DRIVER "cdc_wdm"
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/*
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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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* Handling a protocol like QMI is out of the scope for any driver.
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* It can be exported as a character device using the cdc-wdm driver,
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* which will enable userspace applications ("modem managers") to
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* handle it. This may be required to use the network interface
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* provided by the driver.
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*
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* These devices may alternatively/additionally be configured using AT
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* commands on any of the serial interfaces driven by the option driver
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*
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* This driver binds only to the data ("slave") interface to enable
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* the cdc-wdm driver to bind to the control interface. It still
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* parses the CDC functional descriptors on the control interface to
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* a) verify that this is indeed a handled interface (CDC Union
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* header lists it as slave)
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* b) get MAC address and other ethernet config from the CDC Ethernet
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* header
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* c) enable user bind requests against the control interface, which
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* is the common way to bind to CDC Ethernet Control Model type
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* interfaces
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* d) provide a hint to the user about which interface is the
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* corresponding management interface
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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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struct usb_interface *control = NULL;
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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 required = 1 << USB_CDC_HEADER_TYPE | 1 << USB_CDC_UNION_TYPE;
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u32 found = 0;
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2012-03-09 19:35:05 +08:00
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atomic_t *pmcount = (void *)&dev->data[1];
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atomic_set(pmcount, 0);
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2012-01-19 23:37:22 +08:00
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/*
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* assume a data interface has no additional descriptors and
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* that the control and data interface are numbered
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* consecutively - this holds for the Huawei device at least
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*/
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if (len == 0 && desc->bInterfaceNumber > 0) {
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control = usb_ifnum_to_if(dev->udev, desc->bInterfaceNumber - 1);
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if (!control)
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goto err;
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buf = control->cur_altsetting->extra;
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len = control->cur_altsetting->extralen;
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dev_dbg(&intf->dev, "guessing \"control\" => %s, \"data\" => this\n",
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dev_name(&control->dev));
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}
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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 & required) != required) {
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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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/* give the user a helpful hint if trying to bind to the wrong interface */
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if (cdc_union && desc->bInterfaceNumber == cdc_union->bMasterInterface0) {
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dev_err(&intf->dev, "leaving \"control\" interface for " DM_DRIVER " - try binding to %s instead!\n",
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dev_name(&usb_ifnum_to_if(dev->udev, cdc_union->bSlaveInterface0)->dev));
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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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/* success! point the user to the management interface */
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if (control)
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dev_info(&intf->dev, "Use \"" DM_DRIVER "\" for QMI interface %s\n",
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dev_name(&control->dev));
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/* XXX: add a sysfs symlink somewhere to help management applications find it? */
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/* collect bulk endpoints now that we know intf == "data" interface */
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status = usbnet_get_endpoints(dev, intf);
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err:
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return status;
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}
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2012-03-09 19:35:05 +08:00
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/* using a counter to merge subdriver requests with our own into a combined state */
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2012-01-19 23:37:22 +08:00
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static int qmi_wwan_manage_power(struct usbnet *dev, int on)
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{
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2012-03-09 19:35:05 +08:00
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atomic_t *pmcount = (void *)&dev->data[1];
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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(pmcount), on);
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if ((on && atomic_add_return(1, pmcount) == 1) || (!on && atomic_dec_and_test(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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return qmi_wwan_manage_power(dev, on);
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2012-01-19 23:37:22 +08:00
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}
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2012-03-09 19:35:05 +08:00
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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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* Setting up cdc-wdm as a subdriver owning the interrupt endpoint
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* will let it provide userspace access to the encapsulated QMI
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* protocol without interfering with the usbnet operations.
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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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int rv;
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struct usb_driver *subdriver = NULL;
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atomic_t *pmcount = (void *)&dev->data[1];
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atomic_set(pmcount, 0);
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/* collect all three endpoints */
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rv = usbnet_get_endpoints(dev, intf);
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if (rv < 0)
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goto err;
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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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subdriver = usb_cdc_wdm_register(intf, &dev->status->desc, 512, &qmi_wwan_cdc_wdm_manage_power);
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if (IS_ERR(subdriver)) {
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rv = PTR_ERR(subdriver);
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goto err;
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}
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/* can't let usbnet use the interrupt endpoint */
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dev->status = NULL;
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/* save subdriver struct for suspend/resume wrappers */
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dev->data[0] = (unsigned long)subdriver;
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err:
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return rv;
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}
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2012-03-09 19:35:06 +08:00
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/* Gobi devices uses identical class/protocol codes for all interfaces regardless
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* of function. Some of these are CDC ACM like and have the exact same endpoints
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* we are looking for. This leaves two possible strategies for identifying the
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* correct interface:
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* a) hardcoding interface number, or
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* b) use the fact that the wwan interface is the only one lacking additional
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* (CDC functional) descriptors
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*
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* Let's see if we can get away with the generic b) solution.
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*/
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static int qmi_wwan_bind_gobi(struct usbnet *dev, struct usb_interface *intf)
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{
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int rv = -EINVAL;
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/* ignore any interface with additional descriptors */
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if (intf->cur_altsetting->extralen)
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goto err;
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rv = qmi_wwan_bind_shared(dev, intf);
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err:
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return rv;
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}
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2012-03-09 19:35:05 +08:00
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static void qmi_wwan_unbind_shared(struct usbnet *dev, struct usb_interface *intf)
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{
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struct usb_driver *subdriver = (void *)dev->data[0];
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if (subdriver && subdriver->disconnect)
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subdriver->disconnect(intf);
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dev->data[0] = (unsigned long)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 usb_driver *subdriver = (void *)dev->data[0];
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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 (subdriver && subdriver->suspend)
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ret = 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 usb_driver *subdriver = (void *)dev->data[0];
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int ret = 0;
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if (subdriver && subdriver->resume)
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ret = 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 && subdriver && subdriver->resume && subdriver->suspend)
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subdriver->suspend(intf, PMSG_SUSPEND);
|
|
|
|
|
err:
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2012-01-19 23:37:22 +08:00
|
|
|
static const struct driver_info qmi_wwan_info = {
|
|
|
|
|
.description = "QMI speaking wwan device",
|
|
|
|
|
.flags = FLAG_WWAN,
|
|
|
|
|
.bind = qmi_wwan_bind,
|
|
|
|
|
.manage_power = qmi_wwan_manage_power,
|
|
|
|
|
};
|
|
|
|
|
|
2012-03-09 19:35:05 +08:00
|
|
|
static const struct driver_info qmi_wwan_shared = {
|
|
|
|
|
.description = "QMI speaking wwan device with combined interface",
|
|
|
|
|
.flags = FLAG_WWAN,
|
|
|
|
|
.bind = qmi_wwan_bind_shared,
|
|
|
|
|
.unbind = qmi_wwan_unbind_shared,
|
|
|
|
|
.manage_power = qmi_wwan_manage_power,
|
|
|
|
|
};
|
|
|
|
|
|
2012-03-09 19:35:06 +08:00
|
|
|
static const struct driver_info qmi_wwan_gobi = {
|
|
|
|
|
.description = "Qualcomm Gobi wwan/QMI device",
|
|
|
|
|
.flags = FLAG_WWAN,
|
|
|
|
|
.bind = qmi_wwan_bind_gobi,
|
|
|
|
|
.unbind = qmi_wwan_unbind_shared,
|
|
|
|
|
.manage_power = qmi_wwan_manage_power,
|
|
|
|
|
};
|
|
|
|
|
|
2012-01-19 23:37:22 +08:00
|
|
|
#define HUAWEI_VENDOR_ID 0x12D1
|
2012-03-09 19:35:06 +08:00
|
|
|
#define QMI_GOBI_DEVICE(vend, prod) \
|
|
|
|
|
USB_DEVICE(vend, prod), \
|
|
|
|
|
.driver_info = (unsigned long)&qmi_wwan_gobi
|
2012-01-19 23:37:22 +08:00
|
|
|
|
|
|
|
|
static const struct usb_device_id products[] = {
|
2012-03-09 19:35:05 +08:00
|
|
|
{ /* Huawei E392, E398 and possibly others sharing both device id and more... */
|
|
|
|
|
.match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_INT_INFO,
|
|
|
|
|
.idVendor = HUAWEI_VENDOR_ID,
|
|
|
|
|
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
|
|
|
|
|
.bInterfaceSubClass = 1,
|
|
|
|
|
.bInterfaceProtocol = 8, /* NOTE: This is the *slave* interface of the CDC Union! */
|
|
|
|
|
.driver_info = (unsigned long)&qmi_wwan_info,
|
|
|
|
|
},
|
|
|
|
|
{ /* Huawei E392, E398 and possibly others in "Windows mode"
|
|
|
|
|
* using a combined control and data interface without any CDC
|
|
|
|
|
* functional descriptors
|
|
|
|
|
*/
|
|
|
|
|
.match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_INT_INFO,
|
|
|
|
|
.idVendor = HUAWEI_VENDOR_ID,
|
|
|
|
|
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
|
|
|
|
|
.bInterfaceSubClass = 1,
|
|
|
|
|
.bInterfaceProtocol = 17,
|
|
|
|
|
.driver_info = (unsigned long)&qmi_wwan_shared,
|
|
|
|
|
},
|
2012-03-09 19:35:06 +08:00
|
|
|
{ /* Pantech UML290 */
|
|
|
|
|
.match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,
|
|
|
|
|
.idVendor = 0x106c,
|
|
|
|
|
.idProduct = 0x3718,
|
|
|
|
|
.bInterfaceClass = 0xff,
|
|
|
|
|
.bInterfaceSubClass = 0xf0,
|
|
|
|
|
.bInterfaceProtocol = 0xff,
|
|
|
|
|
.driver_info = (unsigned long)&qmi_wwan_shared,
|
|
|
|
|
},
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9212)}, /* Acer Gobi Modem Device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x03f0, 0x1f1d)}, /* HP un2400 Gobi Modem Device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x03f0, 0x371d)}, /* HP un2430 Mobile Broadband Module */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x04da, 0x250d)}, /* Panasonic Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x413c, 0x8172)}, /* Dell Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x1410, 0xa001)}, /* Novatel Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x0b05, 0x1776)}, /* Asus Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x19d2, 0xfff3)}, /* ONDA Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9001)}, /* Generic Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9002)}, /* Generic Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9202)}, /* Generic Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9203)}, /* Generic Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9222)}, /* Generic Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9009)}, /* Generic Gobi Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x413c, 0x8186)}, /* Dell Gobi 2000 Modem device (N0218, VU936) */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x920b)}, /* Generic Gobi 2000 Modem device */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9225)}, /* Sony Gobi 2000 Modem device (N0279, VU730) */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9245)}, /* Samsung Gobi 2000 Modem device (VL176) */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x03f0, 0x251d)}, /* HP Gobi 2000 Modem device (VP412) */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9265)}, /* Asus Gobi 2000 Modem device (VR305) */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9235)}, /* Top Global Gobi 2000 Modem device (VR306) */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x05c6, 0x9275)}, /* iRex Technologies Gobi 2000 Modem device (VR307) */
|
|
|
|
|
{QMI_GOBI_DEVICE(0x1199, 0x9001)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
|
|
|
|
|
{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_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) */
|
|
|
|
|
{ } /* END */
|
2012-01-19 23:37:22 +08:00
|
|
|
};
|
|
|
|
|
MODULE_DEVICE_TABLE(usb, products);
|
|
|
|
|
|
|
|
|
|
static struct usb_driver qmi_wwan_driver = {
|
|
|
|
|
.name = "qmi_wwan",
|
|
|
|
|
.id_table = products,
|
|
|
|
|
.probe = usbnet_probe,
|
|
|
|
|
.disconnect = usbnet_disconnect,
|
2012-03-09 19:35:05 +08:00
|
|
|
.suspend = qmi_wwan_suspend,
|
|
|
|
|
.resume = qmi_wwan_resume,
|
|
|
|
|
.reset_resume = qmi_wwan_resume,
|
2012-01-19 23:37:22 +08:00
|
|
|
.supports_autosuspend = 1,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static int __init qmi_wwan_init(void)
|
|
|
|
|
{
|
|
|
|
|
return usb_register(&qmi_wwan_driver);
|
|
|
|
|
}
|
|
|
|
|
module_init(qmi_wwan_init);
|
|
|
|
|
|
|
|
|
|
static void __exit qmi_wwan_exit(void)
|
|
|
|
|
{
|
|
|
|
|
usb_deregister(&qmi_wwan_driver);
|
|
|
|
|
}
|
|
|
|
|
module_exit(qmi_wwan_exit);
|
|
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Bjørn Mork <bjorn@mork.no>");
|
|
|
|
|
MODULE_DESCRIPTION("Qualcomm MSM Interface (QMI) WWAN driver");
|
|
|
|
|
MODULE_LICENSE("GPL");
|
