patch-2.4.23 linux-2.4.23/include/linux/usb_ch9.h

• Lines: 358
• Date: 2003-11-28 10:26:21.000000000 -0800
• Orig file: linux-2.4.22/include/linux/usb_ch9.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.22/include/linux/usb_ch9.h linux-2.4.23/include/linux/usb_ch9.h
@@ -0,0 +1,357 @@
+/*
+ * This file holds USB constants and structures that are needed for USB
+ * device APIs.  These are used by the USB device model, which is defined
+ * in chapter 9 of the USB 2.0 specification.  Linux has several APIs in C
+ * that need these:
+ *
+ * - the master/host side Linux-USB kernel driver API;
+ * - the "usbfs" user space API; and
+ * - (eventually) a Linux "gadget" slave/device side driver API.
+ *
+ * USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
+ * act either as a USB master/host or as a USB slave/device.  That means
+ * the master and slave side APIs will benefit from working well together.
+ */
+
+#ifndef __LINUX_USB_CH9_H
+#define __LINUX_USB_CH9_H
+
+#include <asm/types.h>		/* __u8 etc */
+
+/*-------------------------------------------------------------------------*/
+
+/* CONTROL REQUEST SUPPORT */
+
+/*
+ * USB directions
+ *
+ * This bit flag is used in endpoint descriptors' bEndpointAddress field.
+ * It's also one of three fields in control requests bRequestType.
+ */
+#define USB_DIR_OUT			0		/* to device */
+#define USB_DIR_IN			0x80		/* to host */
+
+/*
+ * USB types, the second of three bRequestType fields
+ */
+#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)
+
+/*
+ * USB recipients, the third of three bRequestType fields
+ */
+#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
+
+/*
+ * Standard requests, for the bRequest field of a SETUP packet.
+ *
+ * These are qualified by the bRequestType field, so that for example
+ * TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved
+ * by a GET_STATUS request.
+ */
+#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 - SETUP data for a USB device control request
+ * @bRequestType: matches the USB bmRequestType field
+ * @bRequest: matches the USB bRequest field
+ * @wValue: matches the USB wValue field (le16 byte order)
+ * @wIndex: matches the USB wIndex field (le16 byte order)
+ * @wLength: matches the USB wLength field (le16 byte order)
+ *
+ * This structure is used to send control requests to a USB device.  It matches
+ * the different fields of the USB 2.0 Spec section 9.3, table 9-2.  See the
+ * USB spec for a fuller description of the different fields, and what they are
+ * used for.
+ *
+ * Note that the driver for any interface can issue control requests.
+ * For most devices, interfaces don't coordinate with each other, so
+ * such requests may be made at any time.
+ */
+struct usb_ctrlrequest {
+	__u8 bRequestType;
+	__u8 bRequest;
+	__u16 wValue;
+	__u16 wIndex;
+	__u16 wLength;
+} __attribute__ ((packed));
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
+ * (rarely) accepted by SET_DESCRIPTOR.
+ *
+ * Note that all multi-byte values here are encoded in little endian
+ * byte order "on the wire".  But when exposed through Linux-USB APIs,
+ * they've been converted to cpu byte order.
+ */
+
+/*
+ * Descriptor types ... USB 2.0 spec table 9.5
+ */
+#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
+#define USB_DT_INTERFACE_POWER		0x08
+/* these are from a minor usb 2.0 revision (ECN) */
+#define USB_DT_OTG			0x09
+#define USB_DT_DEBUG			0x0a
+#define USB_DT_INTERFACE_ASSOCIATION	0x0b
+
+/* conventional codes for class-specific descriptors */
+#define USB_DT_CS_DEVICE		0x21
+#define USB_DT_CS_CONFIG		0x22
+#define USB_DT_CS_STRING		0x23
+#define USB_DT_CS_INTERFACE		0x24
+#define USB_DT_CS_ENDPOINT		0x25
+
+/* All standard descriptors have these 2 fields at the beginning */
+struct usb_descriptor_header {
+	__u8  bLength;
+	__u8  bDescriptorType;
+} __attribute__ ((packed));
+
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_DEVICE: Device descriptor */
+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;
+} __attribute__ ((packed));
+
+#define USB_DT_DEVICE_SIZE		18
+
+
+/*
+ * Device and/or Interface Class codes
+ * as found in bDeviceClass or bInterfaceClass
+ * and defined by www.usb.org documents
+ */
+#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
+#define USB_CLASS_CDC_DATA		0x0a
+#define USB_CLASS_CSCID			0x0b	/* chip+ smart card */
+#define USB_CLASS_CONTENT_SEC		0x0d	/* content security */
+#define USB_CLASS_VIDEO			0x0e
+#define USB_CLASS_APP_SPEC		0xfe
+#define USB_CLASS_VENDOR_SPEC		0xff
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_CONFIG: Configuration descriptor information.
+ *
+ * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
+ * descriptor type is different.  Highspeed-capable devices can look
+ * different depending on what speed they're currently running.  Only
+ * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
+ * descriptors.
+ */
+struct usb_config_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+
+	__u16 wTotalLength;
+	__u8  bNumInterfaces;
+	__u8  bConfigurationValue;
+	__u8  iConfiguration;
+	__u8  bmAttributes;
+	__u8  bMaxPower;
+} __attribute__ ((packed));
+
+#define USB_DT_CONFIG_SIZE		9
+
+/* from config descriptor bmAttributes */
+#define USB_CONFIG_ATT_ONE		(1 << 7)	/* must be set */
+#define USB_CONFIG_ATT_SELFPOWER	(1 << 6)	/* self powered */
+#define USB_CONFIG_ATT_WAKEUP		(1 << 5)	/* can wakeup */
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_STRING: String descriptor */
+struct usb_string_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+
+	__u16 wData[1];		/* UTF-16LE encoded */
+} __attribute__ ((packed));
+
+/* note that "string" zero is special, it holds language codes that
+ * the device supports, not Unicode characters.
+ */
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_INTERFACE: Interface descriptor */
+struct usb_interface_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+
+	__u8  bInterfaceNumber;
+	__u8  bAlternateSetting;
+	__u8  bNumEndpoints;
+	__u8  bInterfaceClass;
+	__u8  bInterfaceSubClass;
+	__u8  bInterfaceProtocol;
+	__u8  iInterface;
+} __attribute__ ((packed));
+
+#define USB_DT_INTERFACE_SIZE		9
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_ENDPOINT: Endpoint descriptor */
+struct usb_endpoint_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+
+	__u8  bEndpointAddress;
+	__u8  bmAttributes;
+	__u16 wMaxPacketSize;
+	__u8  bInterval;
+
+	// NOTE:  these two are _only_ in audio endpoints.
+	// use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof.
+	__u8  bRefresh;
+	__u8  bSynchAddress;
+} __attribute__ ((packed));
+
+#define USB_DT_ENDPOINT_SIZE		7
+#define USB_DT_ENDPOINT_AUDIO_SIZE	9	/* Audio extension */
+
+
+/*
+ * Endpoints
+ */
+#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
+
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
+struct usb_qualifier_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+
+	__u16 bcdUSB;
+	__u8  bDeviceClass;
+	__u8  bDeviceSubClass;
+	__u8  bDeviceProtocol;
+	__u8  bMaxPacketSize0;
+	__u8  bNumConfigurations;
+	__u8  bRESERVED;
+} __attribute__ ((packed));
+
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_OTG (from OTG 1.0a supplement) */
+struct usb_otg_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+
+	__u8  bmAttributes;	/* support for HNP, SRP, etc */
+} __attribute__ ((packed));
+
+/* from usb_otg_descriptor.bmAttributes */
+#define USB_OTG_SRP		(1 << 0)
+#define USB_OTG_HNP		(1 << 1)	/* swap host/device roles */
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
+struct usb_interface_assoc_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+
+	__u8  bFirstInterface;
+	__u8  bInterfaceCount;
+	__u8  bFunctionClass;
+	__u8  bFunctionSubClass;
+	__u8  bFunctionProtocol;
+	__u8  iFunction;
+} __attribute__ ((packed));
+
+
+/*-------------------------------------------------------------------------*/
+
+/* USB 2.0 defines three speeds, here's how Linux identifies them */
+
+enum usb_device_speed {
+	USB_SPEED_UNKNOWN = 0,			/* enumerating */
+	USB_SPEED_LOW, USB_SPEED_FULL,		/* usb 1.1 */
+	USB_SPEED_HIGH				/* usb 2.0 */
+};
+
+enum usb_device_state {
+	/* NOTATTACHED isn't in the USB spec, and this state acts
+	 * the same as ATTACHED ... but it's clearer this way.
+	 */
+	USB_STATE_NOTATTACHED = 0,
+
+	/* the chapter 9 device states */
+	USB_STATE_ATTACHED,
+	USB_STATE_POWERED,
+	USB_STATE_DEFAULT,			/* limited function */
+	USB_STATE_ADDRESS,
+	USB_STATE_CONFIGURED,			/* most functions */
+
+	USB_STATE_SUSPENDED
+
+	/* NOTE:  there are actually four different SUSPENDED
+	 * states, returning to POWERED, DEFAULT, ADDRESS, or
+	 * CONFIGURED respectively when SOF tokens flow again.
+	 */
+};
+
+#endif	/* __LINUX_USB_CH9_H */