390 lines
8.6 KiB
C
390 lines
8.6 KiB
C
/*
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* multi.c -- Multifunction Composite driver
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*
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* Copyright (C) 2008 David Brownell
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* Copyright (C) 2008 Nokia Corporation
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* Copyright (C) 2009 Samsung Electronics
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* Author: Michal Nazarewicz (mina86@mina86.com)
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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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#include <linux/kernel.h>
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#include <linux/module.h>
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#include "u_serial.h"
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#if defined USB_ETH_RNDIS
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# undef USB_ETH_RNDIS
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#endif
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#ifdef CONFIG_USB_G_MULTI_RNDIS
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# define USB_ETH_RNDIS y
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#endif
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#define DRIVER_DESC "Multifunction Composite Gadget"
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_AUTHOR("Michal Nazarewicz");
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MODULE_LICENSE("GPL");
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/***************************** All the files... *****************************/
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/*
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* kbuild is not very cooperative with respect to linking separately
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* compiled library objects into one module. So for now we won't use
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* separate compilation ... ensuring init/exit sections work to shrink
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* the runtime footprint, and giving us at least some parts of what
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* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
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*/
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#include "f_mass_storage.c"
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#define USBF_ECM_INCLUDED
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#include "f_ecm.c"
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#ifdef USB_ETH_RNDIS
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# define USB_FRNDIS_INCLUDED
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# include "f_rndis.c"
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# include "rndis.h"
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#endif
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#include "u_ether.h"
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USB_GADGET_COMPOSITE_OPTIONS();
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USB_ETHERNET_MODULE_PARAMETERS();
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/***************************** Device Descriptor ****************************/
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#define MULTI_VENDOR_NUM 0x1d6b /* Linux Foundation */
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#define MULTI_PRODUCT_NUM 0x0104 /* Multifunction Composite Gadget */
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enum {
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__MULTI_NO_CONFIG,
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#ifdef CONFIG_USB_G_MULTI_RNDIS
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MULTI_RNDIS_CONFIG_NUM,
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#endif
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#ifdef CONFIG_USB_G_MULTI_CDC
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MULTI_CDC_CONFIG_NUM,
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#endif
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};
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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_MISC /* 0xEF */,
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.bDeviceSubClass = 2,
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.bDeviceProtocol = 1,
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/* Vendor and product id can be overridden by module parameters. */
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.idVendor = cpu_to_le16(MULTI_VENDOR_NUM),
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.idProduct = cpu_to_le16(MULTI_PRODUCT_NUM),
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};
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static const struct usb_descriptor_header *otg_desc[] = {
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(struct usb_descriptor_header *) &(struct usb_otg_descriptor){
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.bLength = sizeof(struct usb_otg_descriptor),
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.bDescriptorType = USB_DT_OTG,
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/*
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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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NULL,
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};
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enum {
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MULTI_STRING_RNDIS_CONFIG_IDX = USB_GADGET_FIRST_AVAIL_IDX,
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MULTI_STRING_CDC_CONFIG_IDX,
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};
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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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[MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
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[MULTI_STRING_CDC_CONFIG_IDX].s = "Multifunction with CDC ECM",
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{ } /* end of list */
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};
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static struct usb_gadget_strings *dev_strings[] = {
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&(struct usb_gadget_strings){
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.language = 0x0409, /* en-us */
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.strings = strings_dev,
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},
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NULL,
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};
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/****************************** Configurations ******************************/
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static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
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#ifdef CONFIG_USB_GADGET_DEBUG_FILES
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static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;
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#else
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/*
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* Number of buffers we will use.
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* 2 is usually enough for good buffering pipeline
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*/
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#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS
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#endif /* CONFIG_USB_DEBUG */
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FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
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static struct fsg_common fsg_common;
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static u8 host_mac[ETH_ALEN];
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static struct usb_function_instance *fi_acm;
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static struct eth_dev *the_dev;
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/********** RNDIS **********/
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#ifdef USB_ETH_RNDIS
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static struct usb_function *f_acm_rndis;
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static __init int rndis_do_config(struct usb_configuration *c)
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{
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int ret;
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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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ret = rndis_bind_config(c, host_mac, the_dev);
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if (ret < 0)
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return ret;
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f_acm_rndis = usb_get_function(fi_acm);
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if (IS_ERR(f_acm_rndis))
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return PTR_ERR(f_acm_rndis);
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ret = usb_add_function(c, f_acm_rndis);
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if (ret)
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goto err_conf;
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ret = fsg_bind_config(c->cdev, c, &fsg_common);
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if (ret < 0)
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goto err_fsg;
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return 0;
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err_fsg:
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usb_remove_function(c, f_acm_rndis);
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err_conf:
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usb_put_function(f_acm_rndis);
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return ret;
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}
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static __ref int rndis_config_register(struct usb_composite_dev *cdev)
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{
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static struct usb_configuration config = {
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.bConfigurationValue = MULTI_RNDIS_CONFIG_NUM,
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.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
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};
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config.label = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].s;
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config.iConfiguration = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].id;
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return usb_add_config(cdev, &config, rndis_do_config);
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}
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#else
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static __ref int rndis_config_register(struct usb_composite_dev *cdev)
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{
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return 0;
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}
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#endif
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/********** CDC ECM **********/
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#ifdef CONFIG_USB_G_MULTI_CDC
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static struct usb_function *f_acm_multi;
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static __init int cdc_do_config(struct usb_configuration *c)
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{
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int ret;
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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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ret = ecm_bind_config(c, host_mac, the_dev);
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if (ret < 0)
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return ret;
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/* implicit port_num is zero */
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f_acm_multi = usb_get_function(fi_acm);
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if (IS_ERR(f_acm_multi))
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return PTR_ERR(f_acm_multi);
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ret = usb_add_function(c, f_acm_multi);
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if (ret)
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goto err_conf;
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ret = fsg_bind_config(c->cdev, c, &fsg_common);
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if (ret < 0)
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goto err_fsg;
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return 0;
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err_fsg:
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usb_remove_function(c, f_acm_multi);
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err_conf:
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usb_put_function(f_acm_multi);
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return ret;
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}
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static __ref int cdc_config_register(struct usb_composite_dev *cdev)
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{
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static struct usb_configuration config = {
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.bConfigurationValue = MULTI_CDC_CONFIG_NUM,
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.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
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};
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config.label = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].s;
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config.iConfiguration = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].id;
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return usb_add_config(cdev, &config, cdc_do_config);
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}
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#else
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static __ref int cdc_config_register(struct usb_composite_dev *cdev)
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{
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return 0;
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}
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#endif
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/****************************** Gadget Bind ******************************/
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static int __ref multi_bind(struct usb_composite_dev *cdev)
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{
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struct usb_gadget *gadget = cdev->gadget;
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int status;
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if (!can_support_ecm(cdev->gadget)) {
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dev_err(&gadget->dev, "controller '%s' not usable\n",
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gadget->name);
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return -EINVAL;
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}
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/* set up network link layer */
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the_dev = gether_setup(cdev->gadget, dev_addr, host_addr, host_mac,
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qmult);
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if (IS_ERR(the_dev))
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return PTR_ERR(the_dev);
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/* set up serial link layer */
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fi_acm = usb_get_function_instance("acm");
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if (IS_ERR(fi_acm)) {
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status = PTR_ERR(fi_acm);
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goto fail0;
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}
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/* set up mass storage function */
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{
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void *retp;
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retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data,
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fsg_num_buffers);
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if (IS_ERR(retp)) {
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status = PTR_ERR(retp);
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goto fail1;
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}
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}
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/* allocate string IDs */
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status = usb_string_ids_tab(cdev, strings_dev);
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if (unlikely(status < 0))
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goto fail2;
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device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
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/* register configurations */
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status = rndis_config_register(cdev);
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if (unlikely(status < 0))
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goto fail2;
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status = cdc_config_register(cdev);
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if (unlikely(status < 0))
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goto fail2;
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usb_composite_overwrite_options(cdev, &coverwrite);
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/* we're done */
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dev_info(&gadget->dev, DRIVER_DESC "\n");
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fsg_common_put(&fsg_common);
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return 0;
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/* error recovery */
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fail2:
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fsg_common_put(&fsg_common);
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fail1:
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usb_put_function_instance(fi_acm);
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fail0:
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gether_cleanup(the_dev);
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return status;
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}
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static int __exit multi_unbind(struct usb_composite_dev *cdev)
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{
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#ifdef CONFIG_USB_G_MULTI_CDC
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usb_put_function(f_acm_multi);
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#endif
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#ifdef USB_ETH_RNDIS
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usb_put_function(f_acm_rndis);
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#endif
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usb_put_function_instance(fi_acm);
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gether_cleanup(the_dev);
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return 0;
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}
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/****************************** Some noise ******************************/
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static __refdata struct usb_composite_driver multi_driver = {
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.name = "g_multi",
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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 = multi_bind,
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.unbind = __exit_p(multi_unbind),
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.needs_serial = 1,
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};
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static int __init multi_init(void)
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{
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return usb_composite_probe(&multi_driver);
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}
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module_init(multi_init);
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static void __exit multi_exit(void)
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{
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usb_composite_unregister(&multi_driver);
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}
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module_exit(multi_exit);
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