hcd.h

ReactOs中的USB驱动

	int	(*urb_dequeue) (struct usb_hcd *hcd, struct urb *urb);

	/* hw synch, freeing endpoint resources that urb_dequeue can't */
	void 	(*endpoint_disable)(struct usb_hcd *hcd,
			struct hcd_dev *dev, int bEndpointAddress);

	/* root hub support */
	int		(*hub_status_data) (struct usb_hcd *hcd, char *buf);
	int		(*hub_control) (struct usb_hcd *hcd,
				u16 typeReq, u16 wValue, u16 wIndex,
				char *buf, u16 wLength);
};
#endif

extern void STDCALL usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb, struct pt_regs *regs);
extern void STDCALL usb_bus_init (struct usb_bus *bus);
extern void usb_rh_status_dequeue (struct usb_hcd *hcd, struct urb *urb);

#ifdef CONFIG_PCI
struct pci_dev;
struct pci_device_id;
extern int STDCALL usb_hcd_pci_probe (struct pci_dev *dev,
				const struct pci_device_id *id);
extern void STDCALL usb_hcd_pci_remove (struct pci_dev *dev);

#ifdef CONFIG_PM
// FIXME:  see Documentation/power/pci.txt (2.4.6 and later?)
// extern int usb_hcd_pci_save_state (struct pci_dev *dev, u32 state);
extern int usb_hcd_pci_suspend (struct pci_dev *dev, u32 state);
extern int usb_hcd_pci_resume (struct pci_dev *dev);
// extern int usb_hcd_pci_enable_wake (struct pci_dev *dev, u32 state, int flg);
#endif /* CONFIG_PM */

#endif /* CONFIG_PCI */

/* pci-ish (pdev null is ok) buffer alloc/mapping support */
int hcd_buffer_create (struct usb_hcd *hcd);
void hcd_buffer_destroy (struct usb_hcd *hcd);

void *hcd_buffer_alloc (struct usb_bus *bus, size_t size,
	int mem_flags, dma_addr_t *dma);
void hcd_buffer_free (struct usb_bus *bus, size_t size,
	void *addr, dma_addr_t dma);

/* generic bus glue, needed for host controllers that don't use PCI */
extern struct usb_operations usb_hcd_operations;
extern irqreturn_t usb_hcd_irq (int irq, void *__hcd, struct pt_regs *r);
extern void STDCALL usb_hc_died (struct usb_hcd *hcd);

/* -------------------------------------------------------------------------- */

/* Enumeration is only for the hub driver, or HCD virtual root hubs */
extern int usb_new_device(struct usb_device *dev, struct device *parent);
extern void STDCALL usb_connect(struct usb_device *dev);
extern void usb_disconnect(struct usb_device **);

/* exported to hub driver ONLY to support usb_reset_device () */
extern int usb_get_configuration(struct usb_device *dev);
extern void usb_set_maxpacket(struct usb_device *dev);
extern void usb_destroy_configuration(struct usb_device *dev);
extern int usb_set_address(struct usb_device *dev);

/* use these only before the device's address has been set */
#define usb_snddefctrl(dev)		((PIPE_CONTROL << 30))
#define usb_rcvdefctrl(dev)		((PIPE_CONTROL << 30) | USB_DIR_IN)

/*-------------------------------------------------------------------------*/

/*
 * HCD Root Hub support
 */

#include "hub.h"

/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
#define DeviceRequest \
	((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
#define DeviceOutRequest \
	((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)

#define InterfaceRequest \
	((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)

#define EndpointRequest \
	((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
#define EndpointOutRequest \
	((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)

/* table 9.6 standard features */
#define DEVICE_REMOTE_WAKEUP	1
#define ENDPOINT_HALT		0

/* class requests from the USB 2.0 hub spec, table 11-15 */
/* GetBusState and SetHubDescriptor are optional, omitted */
#define ClearHubFeature		(0x2000 | USB_REQ_CLEAR_FEATURE)
#define ClearPortFeature	(0x2300 | USB_REQ_CLEAR_FEATURE)
#define GetHubDescriptor	(0xa000 | USB_REQ_GET_DESCRIPTOR)
#define GetHubStatus		(0xa000 | USB_REQ_GET_STATUS)
#define GetPortStatus		(0xa300 | USB_REQ_GET_STATUS)
#define SetHubFeature		(0x2000 | USB_REQ_SET_FEATURE)
#define SetPortFeature		(0x2300 | USB_REQ_SET_FEATURE)


/*-------------------------------------------------------------------------*/

/*
 * Generic bandwidth allocation constants/support
 */
#define FRAME_TIME_USECS	1000L
#define BitTime(bytecount)  (7 * 8 * bytecount / 6)  /* with integer truncation */
		/* Trying not to use worst-case bit-stuffing
                   of (7/6 * 8 * bytecount) = 9.33 * bytecount */
		/* bytecount = data payload byte count */

#define NS_TO_US(ns)	((ns + 500L) / 1000L)
			/* convert & round nanoseconds to microseconds */

extern void STDCALL usb_claim_bandwidth (struct usb_device *dev, struct urb *urb,
		int bustime, int isoc);
extern void STDCALL usb_release_bandwidth (struct usb_device *dev, struct urb *urb,
		int isoc);

/*
 * Full/low speed bandwidth allocation constants/support.
 */
#define BW_HOST_DELAY	1000L		/* nanoseconds */
#define BW_HUB_LS_SETUP	333L		/* nanoseconds */
                        /* 4 full-speed bit times (est.) */

#define FRAME_TIME_BITS         12000L		/* frame = 1 millisecond */
#define FRAME_TIME_MAX_BITS_ALLOC	(90L * FRAME_TIME_BITS / 100L)
#define FRAME_TIME_MAX_USECS_ALLOC	(90L * FRAME_TIME_USECS / 100L)

extern int STDCALL usb_check_bandwidth (struct usb_device *dev, struct urb *urb);

/*
 * Ceiling microseconds (typical) for that many bytes at high speed
 * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
 * to preallocate bandwidth)
 */
#define USB2_HOST_DELAY	5	/* nsec, guess */
#define HS_USECS(bytes) NS_TO_US ( ((55 * 8 * 2083)/1000) \
	+ ((2083UL * (3167 + BitTime (bytes)))/1000) \
	+ USB2_HOST_DELAY)
#define HS_USECS_ISO(bytes) NS_TO_US ( ((long)(38 * 8 * 2.083)) \
	+ ((2083UL * (3167 + BitTime (bytes)))/1000) \
	+ USB2_HOST_DELAY)

extern long STDCALL usb_calc_bus_time (int speed, int is_input,
			int isoc, int bytecount);

/*-------------------------------------------------------------------------*/

extern struct usb_bus STDCALL *usb_alloc_bus (struct usb_operations *);
extern void STDCALL usb_free_bus (struct usb_bus *);

extern void STDCALL usb_register_bus (struct usb_bus *);
extern void STDCALL usb_deregister_bus (struct usb_bus *);

extern int STDCALL usb_register_root_hub (struct usb_device *usb_dev,
		struct device *parent_dev);

/* for portability to 2.4, hcds should call this */
static inline int hcd_register_root (struct usb_hcd *hcd)
{
	return usb_register_root_hub (
		hcd_to_bus (hcd)->root_hub, hcd->controller);
}

/*-------------------------------------------------------------------------*/

/* exported only within usbcore */

extern struct list_head usb_bus_list;
extern struct semaphore usb_bus_list_lock;

extern void usb_bus_get (struct usb_bus *bus);
extern void usb_bus_put (struct usb_bus *bus);

extern int usb_find_interface_driver (struct usb_device *dev,
	struct usb_interface *interface);

#define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))

#define usb_endpoint_out(ep_dir)	(!((ep_dir) & USB_DIR_IN))

/*
 * USB device fs stuff
 */

#ifdef CONFIG_USB_DEVICEFS

/*
 * these are expected to be called from the USB core/hub thread
 * with the kernel lock held
 */
extern void usbfs_add_bus(struct usb_bus *bus);
extern void usbfs_remove_bus(struct usb_bus *bus);
extern void usbfs_add_device(struct usb_device *dev);
extern void usbfs_remove_device(struct usb_device *dev);
extern void usbfs_update_special (void);

extern int usbfs_init(void);
extern void usbfs_cleanup(void);

#else /* CONFIG_USB_DEVICEFS */

static inline void usbfs_add_bus(struct usb_bus *bus) {}
static inline void usbfs_remove_bus(struct usb_bus *bus) {}
static inline void usbfs_add_device(struct usb_device *dev)
{
	if (dev->parent)
	{
		PDEVICE_OBJECT Pdo = (PDEVICE_OBJECT)dev->parent->dev.dev_ext;
		if (Pdo)
			IoInvalidateDeviceRelations(Pdo, BusRelations);
		else
			DPRINT1("Pdo == NULL, not sending IoInvalidateDeviceRelations()!");
	}
}
static inline void usbfs_remove_device(struct usb_device *dev) {}
static inline void usbfs_update_special (void) {}

static inline int usbfs_init(void) { return 0; }
static inline void usbfs_cleanup(void) { }

#endif /* CONFIG_USB_DEVICEFS */

/*-------------------------------------------------------------------------*/

/* hub.h ... DeviceRemovable in 2.4.2-ac11, gone in 2.4.10 */
// bleech -- resurfaced in 2.4.11 or 2.4.12
#define bitmap 	DeviceRemovable


/*-------------------------------------------------------------------------*/

/* random stuff */

#define	RUN_CONTEXT (in_irq () ? "in_irq" \
		: (in_interrupt () ? "in_interrupt" : "can sleep"))


#endif /* __KERNEL__ */