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// USB functions and data.
#ifndef __USB_H
#define __USB_H
// Local information for a usb controller.
struct usb_s {
u8 type;
u8 maxaddr;
u16 bdf;
union {
struct {
u16 iobase;
void *qh;
} uhci;
struct {
struct ohci_regs *regs;
void *control_ed;
} ohci;
};
};
#define USB_TYPE_UHCI 1
#define USB_TYPE_OHCI 2
extern struct usb_s USBControllers[];
struct usb_pipe {
u32 endp;
};
#define USB_MAXADDR 127
// usb.c
void usb_setup();
int configure_usb_device(struct usb_s *cntl, int lowspeed);
struct usb_ctrlrequest;
int send_default_control(u32 endp, const struct usb_ctrlrequest *req
, void *data);
struct usb_pipe *alloc_intr_pipe(u32 endp, int period);
int usb_poll_intr(struct usb_pipe *pipe, void *data);
/****************************************************************
* endpoint definition
****************************************************************/
static inline u32
mkendp(struct usb_s *cntl, u8 devaddr, u8 ep, u8 lowspeed, u8 maxsize)
{
u8 bus = cntl-USBControllers;
u8 size = __ffs(maxsize);
return (size<<25) | (lowspeed<<24) | (bus<<16) | (devaddr<<8) | ep;
}
static inline u8 endp2ep(u32 endp) {
return endp;
}
static inline u8 endp2devaddr(u32 endp) {
return endp>>8;
}
static inline struct usb_s *endp2cntl(u32 endp) {
u8 bus = endp>>16;
return &USBControllers[bus];
}
static inline u8 endp2speed(u32 endp) {
return (endp>>24) & 1;
}
static inline u8 endp2maxsize(u32 endp) {
return 1 << (endp>>25);
}
/****************************************************************
* usb structs and flags
****************************************************************/
#define USB_PID_OUT 0xe1
#define USB_PID_IN 0x69
#define USB_PID_SETUP 0x2d
#define USB_DIR_OUT 0 /* to device */
#define USB_DIR_IN 0x80 /* to host */
#define USB_TYPE_MASK (0x03 << 5)
#define USB_TYPE_STANDARD (0x00 << 5)
#define USB_TYPE_CLASS (0x01 << 5)
#define USB_TYPE_VENDOR (0x02 << 5)
#define USB_TYPE_RESERVED (0x03 << 5)
#define USB_RECIP_MASK 0x1f
#define USB_RECIP_DEVICE 0x00
#define USB_RECIP_INTERFACE 0x01
#define USB_RECIP_ENDPOINT 0x02
#define USB_RECIP_OTHER 0x03
#define USB_REQ_GET_STATUS 0x00
#define USB_REQ_CLEAR_FEATURE 0x01
#define USB_REQ_SET_FEATURE 0x03
#define USB_REQ_SET_ADDRESS 0x05
#define USB_REQ_GET_DESCRIPTOR 0x06
#define USB_REQ_SET_DESCRIPTOR 0x07
#define USB_REQ_GET_CONFIGURATION 0x08
#define USB_REQ_SET_CONFIGURATION 0x09
#define USB_REQ_GET_INTERFACE 0x0A
#define USB_REQ_SET_INTERFACE 0x0B
#define USB_REQ_SYNCH_FRAME 0x0C
struct usb_ctrlrequest {
u8 bRequestType;
u8 bRequest;
u16 wValue;
u16 wIndex;
u16 wLength;
} PACKED;
#define USB_DT_DEVICE 0x01
#define USB_DT_CONFIG 0x02
#define USB_DT_STRING 0x03
#define USB_DT_INTERFACE 0x04
#define USB_DT_ENDPOINT 0x05
#define USB_DT_DEVICE_QUALIFIER 0x06
#define USB_DT_OTHER_SPEED_CONFIG 0x07
struct usb_device_descriptor {
u8 bLength;
u8 bDescriptorType;
u16 bcdUSB;
u8 bDeviceClass;
u8 bDeviceSubClass;
u8 bDeviceProtocol;
u8 bMaxPacketSize0;
u16 idVendor;
u16 idProduct;
u16 bcdDevice;
u8 iManufacturer;
u8 iProduct;
u8 iSerialNumber;
u8 bNumConfigurations;
} PACKED;
#define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */
#define USB_CLASS_AUDIO 1
#define USB_CLASS_COMM 2
#define USB_CLASS_HID 3
#define USB_CLASS_PHYSICAL 5
#define USB_CLASS_STILL_IMAGE 6
#define USB_CLASS_PRINTER 7
#define USB_CLASS_MASS_STORAGE 8
#define USB_CLASS_HUB 9
struct usb_config_descriptor {
u8 bLength;
u8 bDescriptorType;
u16 wTotalLength;
u8 bNumInterfaces;
u8 bConfigurationValue;
u8 iConfiguration;
u8 bmAttributes;
u8 bMaxPower;
} PACKED;
struct usb_interface_descriptor {
u8 bLength;
u8 bDescriptorType;
u8 bInterfaceNumber;
u8 bAlternateSetting;
u8 bNumEndpoints;
u8 bInterfaceClass;
u8 bInterfaceSubClass;
u8 bInterfaceProtocol;
u8 iInterface;
} PACKED;
struct usb_endpoint_descriptor {
u8 bLength;
u8 bDescriptorType;
u8 bEndpointAddress;
u8 bmAttributes;
u16 wMaxPacketSize;
u8 bInterval;
} PACKED;
#define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */
#define USB_ENDPOINT_DIR_MASK 0x80
#define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */
#define USB_ENDPOINT_XFER_CONTROL 0
#define USB_ENDPOINT_XFER_ISOC 1
#define USB_ENDPOINT_XFER_BULK 2
#define USB_ENDPOINT_XFER_INT 3
#define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
#endif // usb.h
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