492 lines
11 KiB
C
492 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.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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#include "f_mass_storage.h"
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#include "u_ecm.h"
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#ifdef USB_ETH_RNDIS
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# include "u_rndis.h"
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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 = DYNAMIC */
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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[2];
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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_GADGET_DEBUG_FILES */
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FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
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static struct usb_function_instance *fi_acm;
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static struct usb_function_instance *fi_msg;
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/********** RNDIS **********/
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#ifdef USB_ETH_RNDIS
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static struct usb_function_instance *fi_rndis;
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static struct usb_function *f_acm_rndis;
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static struct usb_function *f_rndis;
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static struct usb_function *f_msg_rndis;
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static 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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f_rndis = usb_get_function(fi_rndis);
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if (IS_ERR(f_rndis))
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return PTR_ERR(f_rndis);
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ret = usb_add_function(c, f_rndis);
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if (ret < 0)
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goto err_func_rndis;
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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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ret = PTR_ERR(f_acm_rndis);
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goto err_func_acm;
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}
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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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f_msg_rndis = usb_get_function(fi_msg);
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if (IS_ERR(f_msg_rndis)) {
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ret = PTR_ERR(f_msg_rndis);
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goto err_fsg;
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}
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ret = usb_add_function(c, f_msg_rndis);
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if (ret)
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goto err_run;
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return 0;
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err_run:
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usb_put_function(f_msg_rndis);
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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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err_func_acm:
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usb_remove_function(c, f_rndis);
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err_func_rndis:
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usb_put_function(f_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_instance *fi_ecm;
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static struct usb_function *f_acm_multi;
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static struct usb_function *f_ecm;
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static struct usb_function *f_msg_multi;
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static 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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f_ecm = usb_get_function(fi_ecm);
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if (IS_ERR(f_ecm))
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return PTR_ERR(f_ecm);
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ret = usb_add_function(c, f_ecm);
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if (ret < 0)
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goto err_func_ecm;
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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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ret = PTR_ERR(f_acm_multi);
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goto err_func_acm;
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}
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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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f_msg_multi = usb_get_function(fi_msg);
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if (IS_ERR(f_msg_multi)) {
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ret = PTR_ERR(f_msg_multi);
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goto err_fsg;
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}
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ret = usb_add_function(c, f_msg_multi);
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if (ret)
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goto err_run;
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return 0;
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err_run:
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usb_put_function(f_msg_multi);
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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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err_func_acm:
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usb_remove_function(c, f_ecm);
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err_func_ecm:
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usb_put_function(f_ecm);
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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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#ifdef CONFIG_USB_G_MULTI_CDC
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struct f_ecm_opts *ecm_opts;
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#endif
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#ifdef USB_ETH_RNDIS
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struct f_rndis_opts *rndis_opts;
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#endif
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struct fsg_opts *fsg_opts;
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struct fsg_config config;
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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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#ifdef CONFIG_USB_G_MULTI_CDC
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fi_ecm = usb_get_function_instance("ecm");
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if (IS_ERR(fi_ecm))
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return PTR_ERR(fi_ecm);
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ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);
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gether_set_qmult(ecm_opts->net, qmult);
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if (!gether_set_host_addr(ecm_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(ecm_opts->net, dev_addr))
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pr_info("using self ethernet address: %s", dev_addr);
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#endif
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#ifdef USB_ETH_RNDIS
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fi_rndis = usb_get_function_instance("rndis");
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if (IS_ERR(fi_rndis)) {
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status = PTR_ERR(fi_rndis);
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goto fail;
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}
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rndis_opts = container_of(fi_rndis, struct f_rndis_opts, func_inst);
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gether_set_qmult(rndis_opts->net, qmult);
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if (!gether_set_host_addr(rndis_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(rndis_opts->net, dev_addr))
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pr_info("using self ethernet address: %s", dev_addr);
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#endif
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#if (defined CONFIG_USB_G_MULTI_CDC && defined USB_ETH_RNDIS)
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/*
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* If both ecm and rndis are selected then:
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* 1) rndis borrows the net interface from ecm
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* 2) since the interface is shared it must not be bound
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* twice - in ecm's _and_ rndis' binds, so do it here.
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*/
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gether_set_gadget(ecm_opts->net, cdev->gadget);
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status = gether_register_netdev(ecm_opts->net);
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if (status)
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goto fail0;
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rndis_borrow_net(fi_rndis, ecm_opts->net);
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ecm_opts->bound = true;
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#endif
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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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fi_msg = usb_get_function_instance("mass_storage");
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if (IS_ERR(fi_msg)) {
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status = PTR_ERR(fi_msg);
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goto fail1;
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}
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fsg_config_from_params(&config, &fsg_mod_data, fsg_num_buffers);
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fsg_opts = fsg_opts_from_func_inst(fi_msg);
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fsg_opts->no_configfs = true;
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status = fsg_common_set_num_buffers(fsg_opts->common, fsg_num_buffers);
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if (status)
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goto fail2;
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status = fsg_common_set_cdev(fsg_opts->common, cdev, config.can_stall);
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if (status)
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goto fail_set_cdev;
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fsg_common_set_sysfs(fsg_opts->common, true);
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status = fsg_common_create_luns(fsg_opts->common, &config);
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if (status)
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goto fail_set_cdev;
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fsg_common_set_inquiry_string(fsg_opts->common, config.vendor_name,
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config.product_name);
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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 fail_string_ids;
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device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
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if (gadget_is_otg(gadget) && !otg_desc[0]) {
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struct usb_descriptor_header *usb_desc;
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usb_desc = usb_otg_descriptor_alloc(gadget);
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if (!usb_desc)
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goto fail_string_ids;
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usb_otg_descriptor_init(gadget, usb_desc);
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otg_desc[0] = usb_desc;
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otg_desc[1] = NULL;
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}
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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 fail_otg_desc;
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status = cdc_config_register(cdev);
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if (unlikely(status < 0))
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goto fail_otg_desc;
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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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return 0;
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/* error recovery */
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fail_otg_desc:
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kfree(otg_desc[0]);
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otg_desc[0] = NULL;
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fail_string_ids:
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fsg_common_remove_luns(fsg_opts->common);
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fail_set_cdev:
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fsg_common_free_buffers(fsg_opts->common);
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fail2:
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usb_put_function_instance(fi_msg);
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fail1:
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usb_put_function_instance(fi_acm);
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fail0:
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#ifdef USB_ETH_RNDIS
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usb_put_function_instance(fi_rndis);
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fail:
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#endif
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#ifdef CONFIG_USB_G_MULTI_CDC
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usb_put_function_instance(fi_ecm);
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#endif
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return status;
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}
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static int 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_msg_multi);
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#endif
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#ifdef USB_ETH_RNDIS
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usb_put_function(f_msg_rndis);
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#endif
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usb_put_function_instance(fi_msg);
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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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#ifdef USB_ETH_RNDIS
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usb_put_function(f_rndis);
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usb_put_function_instance(fi_rndis);
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#endif
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#ifdef CONFIG_USB_G_MULTI_CDC
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usb_put_function(f_ecm);
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usb_put_function_instance(fi_ecm);
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#endif
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kfree(otg_desc[0]);
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otg_desc[0] = NULL;
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return 0;
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}
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/****************************** Some noise ******************************/
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static 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_SUPER,
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.bind = multi_bind,
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.unbind = multi_unbind,
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.needs_serial = 1,
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};
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module_usb_composite_driver(multi_driver);
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