140 lines
3.3 KiB
C
140 lines
3.3 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Definitions for the Distributed DMA emulation.
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*
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*
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*
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* Authors: Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2020 Miran Grca.
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*/
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#ifndef USB_H
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#define USB_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct usb_t usb_t;
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enum usb_pid
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{
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USB_PID_OUT = 0xE1,
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USB_PID_IN = 0x69,
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USB_PID_SETUP = 0x2D
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};
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enum usb_errors
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{
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USB_ERROR_NO_ERROR = 0,
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USB_ERROR_NAK = 1,
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USB_ERROR_OVERRUN = 2,
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USB_ERROR_UNDERRUN = 3
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};
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/* USB endpoint device struct. Incomplete and unused. */
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typedef struct
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{
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uint16_t vendor_id;
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uint16_t device_id;
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/* General-purpose function for I/O. Non-zero value indicates error. */
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uint8_t (*device_process)(void* priv, uint8_t* data, uint32_t *len, uint8_t pid_token, uint8_t endpoint, uint8_t underrun_not_allowed);
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/* Device reset. */
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void (*device_reset)(void* priv);
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/* Get address. */
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uint8_t (*device_get_address)(void* priv);
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void* priv;
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} usb_device_t;
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enum usb_bus_types
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{
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USB_BUS_OHCI = 0,
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USB_BUS_UHCI,
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USB_BUS_MAX
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};
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/* USB device creation parameters struct */
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typedef struct
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{
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void (*update_interrupt)(usb_t*, void*);
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/* Handle (but do not raise) SMI. Returns 1 if SMI can be raised, 0 otherwise. */
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uint8_t (*smi_handle)(usb_t*, void*);
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void* parent_priv;
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} usb_params_t;
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typedef union
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{
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uint32_t l;
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uint16_t w[2];
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uint8_t b[4];
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} ohci_mmio_t;
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/* USB Host Controller device struct */
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typedef struct usb_t
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{
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uint8_t uhci_io[32];
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ohci_mmio_t ohci_mmio[1024];
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uint16_t uhci_io_base;
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int uhci_enable, ohci_enable;
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uint32_t ohci_mem_base, irq_level;
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mem_mapping_t ohci_mmio_mapping;
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pc_timer_t ohci_frame_timer;
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pc_timer_t ohci_port_reset_timer[2];
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uint8_t ohci_interrupt_counter : 3;
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usb_device_t* ohci_devices[2];
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usb_device_t* uhci_devices[2];
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uint8_t ohci_usb_buf[4096];
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uint8_t ohci_initial_start;
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usb_params_t* usb_params;
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} usb_t;
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#pragma pack(push, 1)
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/* Base USB descriptor struct. */
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typedef struct
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{
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uint8_t bLength;
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uint8_t bDescriptorType;
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} usb_desc_base_t;
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typedef struct
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{
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usb_desc_base_t base;
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uint16_t wTotalLength;
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uint8_t bNumInterfaces;
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uint8_t bConfigurationValue;
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uint8_t iConfiguration;
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uint8_t bmAttributes;
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uint8_t bMaxPower;
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} usb_desc_conf_t;
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#pragma pack(pop)
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/* Global variables. */
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extern const device_t usb_device;
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/* Functions. */
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extern void uhci_update_io_mapping(usb_t *dev, uint8_t base_l, uint8_t base_h, int enable);
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extern void ohci_update_mem_mapping(usb_t *dev, uint8_t base1, uint8_t base2, uint8_t base3, int enable);
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/* Attach USB device to a port of a USB bus. Returns the port to which it got attached to. */
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extern uint8_t usb_attach_device(usb_t *dev, usb_device_t* device, uint8_t bus_type);
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/* Detach USB device from a port. */
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extern void usb_detach_device(usb_t *dev, uint8_t port, uint8_t bus_type);
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#ifdef __cplusplus
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}
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#endif
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#endif /*USB_H*/
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