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