127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
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/* Target based USB-Gadget Function
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*
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* UAS protocol handling, target callbacks, configfs handling,
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* BBB (USB Mass Storage Class Bulk-Only (BBB) and Transport protocol handling.
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*
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* Author: Sebastian Andrzej Siewior <bigeasy at linutronix dot de>
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* License: GPLv2 as published by FSF.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/usb/composite.h>
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#include <linux/usb/gadget.h>
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#include "usbstring.c"
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#include "epautoconf.c"
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#include "config.c"
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#include "composite.c"
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#include "f_tcm.c"
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#define UAS_VENDOR_ID 0x0525 /* NetChip */
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#define UAS_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */
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#define USB_G_STR_MANUFACTOR 1
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#define USB_G_STR_PRODUCT 2
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#define USB_G_STR_SERIAL 3
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#define USB_G_STR_CONFIG 4
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static struct usb_device_descriptor usbg_device_desc = {
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.bLength = sizeof(usbg_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_PER_INTERFACE,
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.idVendor = cpu_to_le16(UAS_VENDOR_ID),
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.idProduct = cpu_to_le16(UAS_PRODUCT_ID),
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.iManufacturer = USB_G_STR_MANUFACTOR,
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.iProduct = USB_G_STR_PRODUCT,
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.iSerialNumber = USB_G_STR_SERIAL,
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.bNumConfigurations = 1,
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};
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static struct usb_string usbg_us_strings[] = {
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{ USB_G_STR_MANUFACTOR, "Target Manufactor"},
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{ USB_G_STR_PRODUCT, "Target Product"},
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{ USB_G_STR_SERIAL, "000000000001"},
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{ USB_G_STR_CONFIG, "default config"},
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{ },
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};
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static struct usb_gadget_strings usbg_stringtab = {
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.language = 0x0409,
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.strings = usbg_us_strings,
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};
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static struct usb_gadget_strings *usbg_strings[] = {
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&usbg_stringtab,
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NULL,
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};
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static struct usb_configuration usbg_config_driver = {
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.label = "Linux Target",
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.bConfigurationValue = 1,
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.iConfiguration = USB_G_STR_CONFIG,
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.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
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};
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static int usbg_cfg_bind(struct usb_configuration *c)
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{
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return tcm_bind_config(c);
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}
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static int usb_target_bind(struct usb_composite_dev *cdev)
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{
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int ret;
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ret = usb_add_config(cdev, &usbg_config_driver,
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usbg_cfg_bind);
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return ret;
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}
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static int guas_unbind(struct usb_composite_dev *cdev)
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{
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return 0;
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}
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static struct usb_composite_driver usbg_driver = {
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.name = "g_target",
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.dev = &usbg_device_desc,
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.strings = usbg_strings,
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.max_speed = USB_SPEED_SUPER,
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.unbind = guas_unbind,
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};
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static int usbg_attach_cb(bool connect)
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{
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int ret = 0;
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if (connect)
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ret = usb_composite_probe(&usbg_driver, usb_target_bind);
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else
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usb_composite_unregister(&usbg_driver);
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return ret;
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}
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static int __init usb_target_gadget_init(void)
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{
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int ret;
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ret = f_tcm_init(&usbg_attach_cb);
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return ret;
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}
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module_init(usb_target_gadget_init);
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static void __exit usb_target_gadget_exit(void)
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{
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f_tcm_exit();
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}
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module_exit(usb_target_gadget_exit);
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MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
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MODULE_DESCRIPTION("usb-gadget fabric");
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MODULE_LICENSE("GPL v2");
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