--- /dev/null
+/*
+ * ncm.c -- NCM gadget driver
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ * Contact: Yauheni Kaliuta <yauheni.kaliuta@nokia.com>
+ *
+ * The driver borrows from ether.c which is:
+ *
+ * Copyright (C) 2003-2005,2008 David Brownell
+ * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/* #define DEBUG */
+/* #define VERBOSE_DEBUG */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb/composite.h>
+
+#include "u_ether.h"
+#include "u_ncm.h"
+
+#define DRIVER_DESC "NCM Gadget"
+
+/*-------------------------------------------------------------------------*/
+
+/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
+ * Instead: allocate your own, using normal USB-IF procedures.
+ */
+
+/* Thanks to NetChip Technologies for donating this product ID.
+ * It's for devices with only CDC Ethernet configurations.
+ */
+#define CDC_VENDOR_NUM 0x0525 /* NetChip */
+#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
+
+/*-------------------------------------------------------------------------*/
+USB_GADGET_COMPOSITE_OPTIONS();
+
+USB_ETHERNET_MODULE_PARAMETERS();
+
+static struct usb_device_descriptor device_desc = {
+ .bLength = sizeof device_desc,
+ .bDescriptorType = USB_DT_DEVICE,
+
+ .bcdUSB = cpu_to_le16 (0x0200),
+
+ .bDeviceClass = USB_CLASS_COMM,
+ .bDeviceSubClass = 0,
+ .bDeviceProtocol = 0,
+ /* .bMaxPacketSize0 = f(hardware) */
+
+ /* Vendor and product id defaults change according to what configs
+ * we support. (As does bNumConfigurations.) These values can
+ * also be overridden by module parameters.
+ */
+ .idVendor = cpu_to_le16 (CDC_VENDOR_NUM),
+ .idProduct = cpu_to_le16 (CDC_PRODUCT_NUM),
+ /* .bcdDevice = f(hardware) */
+ /* .iManufacturer = DYNAMIC */
+ /* .iProduct = DYNAMIC */
+ /* NO SERIAL NUMBER */
+ .bNumConfigurations = 1,
+};
+
+static struct usb_otg_descriptor otg_descriptor = {
+ .bLength = sizeof otg_descriptor,
+ .bDescriptorType = USB_DT_OTG,
+
+ /* REVISIT SRP-only hardware is possible, although
+ * it would not be called "OTG" ...
+ */
+ .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
+};
+
+static const struct usb_descriptor_header *otg_desc[] = {
+ (struct usb_descriptor_header *) &otg_descriptor,
+ NULL,
+};
+
+/* string IDs are assigned dynamically */
+static struct usb_string strings_dev[] = {
+ [USB_GADGET_MANUFACTURER_IDX].s = "",
+ [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
+ [USB_GADGET_SERIAL_IDX].s = "",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings stringtab_dev = {
+ .language = 0x0409, /* en-us */
+ .strings = strings_dev,
+};
+
+static struct usb_gadget_strings *dev_strings[] = {
+ &stringtab_dev,
+ NULL,
+};
+
+static struct usb_function_instance *f_ncm_inst;
+static struct usb_function *f_ncm;
+
+/*-------------------------------------------------------------------------*/
+
+static int ncm_do_config(struct usb_configuration *c)
+{
+ int status;
+
+ /* FIXME alloc iConfiguration string, set it in c->strings */
+
+ if (gadget_is_otg(c->cdev->gadget)) {
+ c->descriptors = otg_desc;
+ c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+ }
+
+ f_ncm = usb_get_function(f_ncm_inst);
+ if (IS_ERR(f_ncm)) {
+ status = PTR_ERR(f_ncm);
+ return status;
+ }
+
+ status = usb_add_function(c, f_ncm);
+ if (status < 0) {
+ usb_put_function(f_ncm);
+ return status;
+ }
+
+ return 0;
+}
+
+static struct usb_configuration ncm_config_driver = {
+ /* .label = f(hardware) */
+ .label = "CDC Ethernet (NCM)",
+ .bConfigurationValue = 1,
+ /* .iConfiguration = DYNAMIC */
+ .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int gncm_bind(struct usb_composite_dev *cdev)
+{
+ struct usb_gadget *gadget = cdev->gadget;
+ struct f_ncm_opts *ncm_opts;
+ int status;
+
+ f_ncm_inst = usb_get_function_instance("ncm");
+ if (IS_ERR(f_ncm_inst))
+ return PTR_ERR(f_ncm_inst);
+
+ ncm_opts = container_of(f_ncm_inst, struct f_ncm_opts, func_inst);
+
+ gether_set_qmult(ncm_opts->net, qmult);
+ if (!gether_set_host_addr(ncm_opts->net, host_addr))
+ pr_info("using host ethernet address: %s", host_addr);
+ if (!gether_set_dev_addr(ncm_opts->net, dev_addr))
+ pr_info("using self ethernet address: %s", dev_addr);
+
+ /* Allocate string descriptor numbers ... note that string
+ * contents can be overridden by the composite_dev glue.
+ */
+
+ status = usb_string_ids_tab(cdev, strings_dev);
+ if (status < 0)
+ goto fail;
+ device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
+ device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
+
+ status = usb_add_config(cdev, &ncm_config_driver,
+ ncm_do_config);
+ if (status < 0)
+ goto fail;
+
+ usb_composite_overwrite_options(cdev, &coverwrite);
+ dev_info(&gadget->dev, "%s\n", DRIVER_DESC);
+
+ return 0;
+
+fail:
+ usb_put_function_instance(f_ncm_inst);
+ return status;
+}
+
+static int gncm_unbind(struct usb_composite_dev *cdev)
+{
+ if (!IS_ERR_OR_NULL(f_ncm))
+ usb_put_function(f_ncm);
+ if (!IS_ERR_OR_NULL(f_ncm_inst))
+ usb_put_function_instance(f_ncm_inst);
+ return 0;
+}
+
+static struct usb_composite_driver ncm_driver = {
+ .name = "g_ncm",
+ .dev = &device_desc,
+ .strings = dev_strings,
+ .max_speed = USB_SPEED_HIGH,
+ .bind = gncm_bind,
+ .unbind = gncm_unbind,
+};
+
+module_usb_composite_driver(ncm_driver);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Yauheni Kaliuta");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff