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132 lines
3.3 KiB
C++
132 lines
3.3 KiB
C++
/*
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* \brief Qemu USB controller interface
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* \author Josef Soentgen
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* \author Sebastian Sumpf
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* \date 2015-12-14
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*/
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/*
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* Copyright (C) 2015-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__QEMU__USB_H_
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#define _INCLUDE__QEMU__USB_H_
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#include <base/stdint.h>
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#include <base/signal.h>
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namespace Qemu {
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typedef Genode::size_t size_t;
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typedef Genode::off_t off_t;
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typedef Genode::int64_t int64_t;
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typedef Genode::addr_t addr_t;
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/************************************
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** Qemu library backend interface **
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************************************/
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/*
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* The backend interface needs to be provided the user of the library.
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*/
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/**
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* Timer_queue class
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*
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* The library uses the Timer_queue internally to schedule timeouts.
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*/
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struct Timer_queue
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{
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virtual int64_t get_ns() = 0;
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virtual void register_timer(void *qtimer, void (*cb)(void *data), void *data) = 0;
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virtual void delete_timer(void *qtimer) = 0;
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virtual void activate_timer(void *qtimer, long long int expires_abs) = 0;
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virtual void deactivate_timer(void *qtimer) = 0;
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};
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/**
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* Pci_device class
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*
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* The library uses the Pci_device to access physical DMA memory and to
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* raise interrupts.
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*/
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struct Pci_device
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{
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/**
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* Raise interrupt
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*
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* \param assert 1 == raise, 0 == deassert interrupt
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*/
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virtual void raise_interrupt(int assert) = 0;
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virtual int read_dma(addr_t addr, void *buf, size_t size) = 0;
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virtual int write_dma(addr_t addr, void const *buf, size_t size) = 0;
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virtual void *map_dma(addr_t base, size_t size) = 0;
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virtual void unmap_dma(void *addr, size_t size) = 0;
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};
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/*************************************
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** Qemu library frontend functions **
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*************************************/
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/**
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* Controller class to access MMIO register of the xHCI device model
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*
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* This class is implemented by the library.
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*/
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struct Controller
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{
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/**
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* Size of the MMIO region of the controller
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*/
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virtual size_t mmio_size() const = 0;
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/**
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* Read/write MMIO offset in the MMIO region of the controller
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*/
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virtual int mmio_read(off_t offset, void *buf, size_t size) = 0;
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virtual int mmio_write(off_t offset, void const *buf, size_t size) = 0;
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};
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/**
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* Initialize USB library
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*
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* \param tq Timer_queue instance provided by the user of the library
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* \param pd Pci_device instance provided by the user of the library
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* \param sr Signal_receiver used by the library to install signals
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*
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* \return Pointer to Controller object that is used to access the xHCI device state
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*/
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Controller *usb_init(Timer_queue &tq, Pci_device &pd,
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Genode::Signal_receiver &sr,
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Genode::Allocator &, Genode::Env &);
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/**
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* Reset USB libray
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*/
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void usb_reset();
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/**
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* Update USB devices list
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*
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* Needs to be called after a library reset.
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*/
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void usb_update_devices();
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/**
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* Library timer callback
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*
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* Needs to be called when a timer triggers (see Timer_queue interface).
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*
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* \param cb Callback installed by Timer_queue::register_timer()
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* \param data Data pointer given in Timer_queue::register_timer()
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*/
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void usb_timer_callback(void (*cb)(void *data), void *data);
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}
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#endif /* _INCLUDE__QEMU__USB_H_ */
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