[people/ms/u-boot.git] / include / usb.h

/*
 * (C) Copyright 2001
 * Denis Peter, MPL AG Switzerland
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 * Note: Part of this code has been derived from linux
 *
 */
#ifndef _USB_H_
#define _USB_H_

#include <usb_defs.h>

/* Everything is aribtrary */
#define USB_ALTSETTINGALLOC          4
#define USB_MAXALTSETTING	           128  /* Hard limit */

#define USB_MAX_DEVICE              32
#define USB_MAXCONFIG		            8
#define USB_MAXINTERFACES	          8
#define USB_MAXENDPOINTS	          16
#define USB_MAXCHILDREN  						8 	/* This is arbitrary */
#define USB_MAX_HUB									16

#define USB_CNTL_TIMEOUT 100 /* 100ms timeout */


/* String descriptor */
struct usb_string_descriptor {
	unsigned char  bLength;
	unsigned char  bDescriptorType;
	unsigned short wData[1];
} __attribute__ ((packed));

/* device request (setup) */
struct devrequest {
	unsigned char requesttype;
	unsigned char request;
	unsigned short value;
	unsigned short index;
	unsigned short length;
} __attribute__ ((packed));


/* All standard descriptors have these 2 fields in common */
struct usb_descriptor_header {
	unsigned char  bLength;
	unsigned char  bDescriptorType;
} __attribute__ ((packed));

/* Device descriptor */
struct usb_device_descriptor {
	unsigned char  bLength;
	unsigned char  bDescriptorType;
	unsigned short bcdUSB;
	unsigned char  bDeviceClass;
	unsigned char  bDeviceSubClass;
	unsigned char  bDeviceProtocol;
	unsigned char  bMaxPacketSize0;
	unsigned short idVendor;
	unsigned short idProduct;
	unsigned short bcdDevice;
	unsigned char  iManufacturer;
	unsigned char  iProduct;
	unsigned char  iSerialNumber;
	unsigned char  bNumConfigurations;
} __attribute__ ((packed));


/* Endpoint descriptor */
struct usb_endpoint_descriptor {
	unsigned char  bLength;
	unsigned char  bDescriptorType;
	unsigned char  bEndpointAddress;
	unsigned char  bmAttributes;
	unsigned short wMaxPacketSize;
	unsigned char  bInterval;
	unsigned char  bRefresh;
	unsigned char  bSynchAddress;

} __attribute__ ((packed));
/* Interface descriptor */
struct usb_interface_descriptor {
	unsigned char  bLength;
	unsigned char  bDescriptorType;
	unsigned char  bInterfaceNumber;
	unsigned char  bAlternateSetting;
	unsigned char  bNumEndpoints;
	unsigned char  bInterfaceClass;
	unsigned char  bInterfaceSubClass;
	unsigned char  bInterfaceProtocol;
	unsigned char  iInterface;

	unsigned char  no_of_ep;
	unsigned char  act_altsetting;
	struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
} __attribute__ ((packed));


/* Configuration descriptor information.. */
struct usb_config_descriptor {
	unsigned char  bLength;
	unsigned char  bDescriptorType;
	unsigned short wTotalLength;
	unsigned char  bNumInterfaces;
	unsigned char  bConfigurationValue;
	unsigned char  iConfiguration;
	unsigned char  bmAttributes;
	unsigned char  MaxPower;

	unsigned char  no_of_if;			/* number of interfaces */
	struct usb_interface_descriptor if_desc[USB_MAXINTERFACES];
} __attribute__ ((packed));


struct usb_device {
	int devnum;								/* Device number on USB bus */
	int slow;									/* Slow device? */
	char mf[32];		     			/* manufacturer */
	char prod[32];		     		/* product */
	char serial[32];       	  /* serial number */

	int maxpacketsize;		    /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
	unsigned int toggle[2];		/* one bit for each endpoint ([0] = IN, [1] = OUT) */
	unsigned int halted[2];		/* endpoint halts; one bit per endpoint # & direction; */
			    /* [0] = IN, [1] = OUT */
	int epmaxpacketin[16];		/* INput endpoint specific maximums */
	int epmaxpacketout[16];		/* OUTput endpoint specific maximums */

	int configno;			/* selected config number */
	struct usb_device_descriptor descriptor; /* Device Descriptor */
	struct usb_config_descriptor config; /* config descriptor */

	int have_langid;		/* whether string_langid is valid yet */
	int string_langid;		/* language ID for strings */
	int (*irq_handle)(struct usb_device *dev);
	unsigned long irq_status;
	int irq_act_len;			/* transfered bytes */
	void *privptr;
	/*
	 * Child devices -  if this is a hub device
	 * Each instance needs its own set of data structures.
	 */
	unsigned long status;
	int act_len;			/* transfered bytes */
	int maxchild;			/* Number of ports if hub */
	struct usb_device *parent;
	struct usb_device *children[USB_MAXCHILDREN];
};

/**********************************************************************
 * this is how the lowlevel part communicate with the outer world
 */

#if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI)
int usb_lowlevel_init(void);
int usb_lowlevel_stop(void);
int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,int transfer_len);
int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
			int transfer_len,struct devrequest *setup);
int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
			int transfer_len, int interval);

/* Defines */
#define USB_UHCI_VEND_ID 0x8086
#define USB_UHCI_DEV_ID  0x7112

#else
#error USB Lowlevel not defined
#endif

#ifdef CONFIG_USB_STORAGE

#define USB_MAX_STOR_DEV 5
block_dev_desc_t *usb_stor_get_dev(int index);
int usb_stor_scan(int mode);

#endif

#ifdef CONFIG_USB_KEYBOARD

int drv_usb_kbd_init(void);
int usb_kbd_deregister(void);

#endif
/* routines */
int usb_init(void); /* initialize the USB Controller */
int usb_stop(void); /* stop the USB Controller */


int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id);
struct usb_device * usb_get_dev_index(int index);
int usb_control_msg(struct usb_device *dev, unsigned int pipe,
			unsigned char request, unsigned char requesttype,
			unsigned short value, unsigned short index,
			void *data, unsigned short size, int timeout);
int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
			void *data, int len, int *actual_length, int timeout);
int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
			void *buffer,int transfer_len, int interval);
void usb_disable_asynch(int disable);
int usb_maxpacket(struct usb_device *dev,unsigned long pipe);
void __inline__ wait_ms(unsigned long ms);
int usb_get_configuration_no(struct usb_device *dev,unsigned char *buffer,int cfgno);
int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size);
int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
		unsigned char type, unsigned char id, void *buf, int size);
int usb_clear_halt(struct usb_device *dev, int pipe);
int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
int usb_set_interface(struct usb_device *dev, int interface, int alternate);

/* big endian -> little endian conversion */
/* some CPUs are already little endian e.g. the ARM920T */
#ifdef LITTLEENDIAN
#define swap_16(x) ((unsigned short)(x))
#define swap_32(x) ((unsigned long)(x))
#else
#define swap_16(x) \
	({ unsigned short x_ = (unsigned short)x; \
	 (unsigned short)( \
		((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8) ); \
	})
#define swap_32(x) \
	({ unsigned long x_ = (unsigned long)x; \
	 (unsigned long)( \
		((x_ & 0x000000FFUL) << 24) | \
		((x_ & 0x0000FF00UL) <<  8) | \
		((x_ & 0x00FF0000UL) >>  8) | \
		((x_ & 0xFF000000UL) >> 24) ); \
	})
#endif /* LITTLEENDIAN */

/*
 * Calling this entity a "pipe" is glorifying it. A USB pipe
 * is something embarrassingly simple: it basically consists
 * of the following information:
 *  - device number (7 bits)
 *  - endpoint number (4 bits)
 *  - current Data0/1 state (1 bit)
 *  - direction (1 bit)
 *  - speed (1 bit)
 *  - max packet size (2 bits: 8, 16, 32 or 64)
 *  - pipe type (2 bits: control, interrupt, bulk, isochronous)
 *
 * That's 18 bits. Really. Nothing more. And the USB people have
 * documented these eighteen bits as some kind of glorious
 * virtual data structure.
 *
 * Let's not fall in that trap. We'll just encode it as a simple
 * unsigned int. The encoding is:
 *
 *  - max size:		bits 0-1	(00 = 8, 01 = 16, 10 = 32, 11 = 64)
 *  - direction:	bit 7		(0 = Host-to-Device [Out], 1 = Device-to-Host [In])
 *  - device:		bits 8-14
 *  - endpoint:		bits 15-18
 *  - Data0/1:		bit 19
 *  - speed:		bit 26		(0 = Full, 1 = Low Speed)
 *  - pipe type:	bits 30-31	(00 = isochronous, 01 = interrupt, 10 = control, 11 = bulk)
 *
 * Why? Because it's arbitrary, and whatever encoding we select is really
 * up to us. This one happens to share a lot of bit positions with the UHCI
 * specification, so that much of the uhci driver can just mask the bits
 * appropriately.
 */
/* Create various pipes... */
#define create_pipe(dev,endpoint) \
		(((dev)->devnum << 8) | (endpoint << 15) | ((dev)->slow << 26) | (dev)->maxpacketsize)
#define default_pipe(dev) ((dev)->slow <<26)

#define usb_sndctrlpipe(dev,endpoint)	((PIPE_CONTROL << 30) | create_pipe(dev,endpoint))
#define usb_rcvctrlpipe(dev,endpoint)	((PIPE_CONTROL << 30) | create_pipe(dev,endpoint) | USB_DIR_IN)
#define usb_sndisocpipe(dev,endpoint)	((PIPE_ISOCHRONOUS << 30) | create_pipe(dev,endpoint))
#define usb_rcvisocpipe(dev,endpoint)	((PIPE_ISOCHRONOUS << 30) | create_pipe(dev,endpoint) | USB_DIR_IN)
#define usb_sndbulkpipe(dev,endpoint)	((PIPE_BULK << 30) | create_pipe(dev,endpoint))
#define usb_rcvbulkpipe(dev,endpoint)	((PIPE_BULK << 30) | create_pipe(dev,endpoint) | USB_DIR_IN)
#define usb_sndintpipe(dev,endpoint)	((PIPE_INTERRUPT << 30) | create_pipe(dev,endpoint))
#define usb_rcvintpipe(dev,endpoint)	((PIPE_INTERRUPT << 30) | create_pipe(dev,endpoint) | USB_DIR_IN)
#define usb_snddefctrl(dev)		((PIPE_CONTROL << 30) | default_pipe(dev))
#define usb_rcvdefctrl(dev)		((PIPE_CONTROL << 30) | default_pipe(dev) | USB_DIR_IN)

/* The D0/D1 toggle bits */
#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
#define	usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << ep))
#define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << ep)) | ((bit) << ep))

/* Endpoint halt control/status */
#define usb_endpoint_out(ep_dir)	(((ep_dir >> 7) & 1) ^ 1)
#define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
#define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
#define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))

#define usb_packetid(pipe)	(((pipe) & USB_DIR_IN) ? USB_PID_IN : USB_PID_OUT)

#define usb_pipeout(pipe)	((((pipe) >> 7) & 1) ^ 1)
#define usb_pipein(pipe)	(((pipe) >> 7) & 1)
#define usb_pipedevice(pipe)	(((pipe) >> 8) & 0x7f)
#define usb_pipe_endpdev(pipe)	(((pipe) >> 8) & 0x7ff)
#define usb_pipeendpoint(pipe)	(((pipe) >> 15) & 0xf)
#define usb_pipedata(pipe)	(((pipe) >> 19) & 1)
#define usb_pipeslow(pipe)	(((pipe) >> 26) & 1)
#define usb_pipetype(pipe)	(((pipe) >> 30) & 3)
#define usb_pipeisoc(pipe)	(usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
#define usb_pipeint(pipe)	(usb_pipetype((pipe)) == PIPE_INTERRUPT)
#define usb_pipecontrol(pipe)	(usb_pipetype((pipe)) == PIPE_CONTROL)
#define usb_pipebulk(pipe)	(usb_pipetype((pipe)) == PIPE_BULK)


/*************************************************************************
 * Hub Stuff
 */
struct usb_port_status {
	unsigned short wPortStatus;
	unsigned short wPortChange;
} __attribute__ ((packed));

struct usb_hub_status {
	unsigned short wHubStatus;
	unsigned short wHubChange;
} __attribute__ ((packed));


/* Hub descriptor */
struct usb_hub_descriptor {
	unsigned char  bLength;
	unsigned char  bDescriptorType;
	unsigned char  bNbrPorts;
	unsigned short wHubCharacteristics;
	unsigned char  bPwrOn2PwrGood;
	unsigned char  bHubContrCurrent;
	unsigned char  DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
	unsigned char  PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
		/* DeviceRemovable and PortPwrCtrlMask want to be variable-length
	   bitmaps that hold max 255 entries. (bit0 is ignored) */
} __attribute__ ((packed));


struct usb_hub_device {
	struct usb_device *pusb_dev;
	struct usb_hub_descriptor desc;
};

#endif /*_USB_H_ */
Commit	Line	Data
012771d8 WD	1	/*
	2	* (C) Copyright 2001
	3	* Denis Peter, MPL AG Switzerland
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*
	23	* Note: Part of this code has been derived from linux
	24	*
	25	*/
	26	#ifndef _USB_H_
	27	#define _USB_H_
	28
	29	#include <usb_defs.h>
	30
	31	/* Everything is aribtrary */
	32	#define USB_ALTSETTINGALLOC 4
	33	#define USB_MAXALTSETTING 128 /* Hard limit */
	34
	35	#define USB_MAX_DEVICE 32
	36	#define USB_MAXCONFIG 8
	37	#define USB_MAXINTERFACES 8
	38	#define USB_MAXENDPOINTS 16
	39	#define USB_MAXCHILDREN 8 /* This is arbitrary */
	40	#define USB_MAX_HUB 16
	41
	42	#define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
	43
	44
	45	/* String descriptor */
	46	struct usb_string_descriptor {
	47	unsigned char bLength;
	48	unsigned char bDescriptorType;
	49	unsigned short wData[1];
	50	} __attribute__ ((packed));
	51
	52	/* device request (setup) */
	53	struct devrequest {
	54	unsigned char requesttype;
	55	unsigned char request;
	56	unsigned short value;
	57	unsigned short index;
	58	unsigned short length;
	59	} __attribute__ ((packed));
	60
	61
012771d8 WD	62	/* All standard descriptors have these 2 fields in common */
	63	struct usb_descriptor_header {
	64	unsigned char bLength;
	65	unsigned char bDescriptorType;
	66	} __attribute__ ((packed));
	67
	68	/* Device descriptor */
	69	struct usb_device_descriptor {
	70	unsigned char bLength;
	71	unsigned char bDescriptorType;
	72	unsigned short bcdUSB;
	73	unsigned char bDeviceClass;
	74	unsigned char bDeviceSubClass;
	75	unsigned char bDeviceProtocol;
	76	unsigned char bMaxPacketSize0;
	77	unsigned short idVendor;
	78	unsigned short idProduct;
	79	unsigned short bcdDevice;
	80	unsigned char iManufacturer;
	81	unsigned char iProduct;
	82	unsigned char iSerialNumber;
	83	unsigned char bNumConfigurations;
	84	} __attribute__ ((packed));
	85
	86
	87	/* Endpoint descriptor */
	88	struct usb_endpoint_descriptor {
	89	unsigned char bLength;
	90	unsigned char bDescriptorType;
	91	unsigned char bEndpointAddress;
	92	unsigned char bmAttributes;
	93	unsigned short wMaxPacketSize;
	94	unsigned char bInterval;
	95	unsigned char bRefresh;
	96	unsigned char bSynchAddress;
	97
	98	} __attribute__ ((packed));
	99	/* Interface descriptor */
	100	struct usb_interface_descriptor {
	101	unsigned char bLength;
	102	unsigned char bDescriptorType;
	103	unsigned char bInterfaceNumber;
	104	unsigned char bAlternateSetting;
	105	unsigned char bNumEndpoints;
	106	unsigned char bInterfaceClass;
	107	unsigned char bInterfaceSubClass;
	108	unsigned char bInterfaceProtocol;
	109	unsigned char iInterface;
	110
	111	unsigned char no_of_ep;
	112	unsigned char act_altsetting;
	113	struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
	114	} __attribute__ ((packed));
	115
	116
	117	/* Configuration descriptor information.. */
	118	struct usb_config_descriptor {
	119	unsigned char bLength;
	120	unsigned char bDescriptorType;
	121	unsigned short wTotalLength;
	122	unsigned char bNumInterfaces;
	123	unsigned char bConfigurationValue;
	124	unsigned char iConfiguration;
	125	unsigned char bmAttributes;
126	unsigned char MaxPower;
127
128	unsigned char no_of_if; /* number of interfaces */
129	struct usb_interface_descriptor if_desc[USB_MAXINTERFACES];
130	} __attribute__ ((packed));
131
132
133	struct usb_device {
134	int devnum; /* Device number on USB bus */
135	int slow; /* Slow device? */
136	char mf[32]; /* manufacturer */
137	char prod[32]; /* product */
138	char serial[32]; /* serial number */
139
140	int maxpacketsize; /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
141	unsigned int toggle[2]; /* one bit for each endpoint ([0] = IN, [1] = OUT) */
142	unsigned int halted[2]; /* endpoint halts; one bit per endpoint # & direction; */
8bde7f77	143	/* [0] = IN, [1] = OUT */
012771d8 WD	144	int epmaxpacketin[16]; /* INput endpoint specific maximums */
	145	int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
	146
	147	int configno; /* selected config number */
	148	struct usb_device_descriptor descriptor; /* Device Descriptor */
	149	struct usb_config_descriptor config; /* config descriptor */
	150
	151	int have_langid; /* whether string_langid is valid yet */
	152	int string_langid; /* language ID for strings */
	153	int (irq_handle)(struct usb_device dev);
	154	unsigned long irq_status;
	155	int irq_act_len; /* transfered bytes */
	156	void *privptr;
	157	/*
	158	* Child devices - if this is a hub device
	159	* Each instance needs its own set of data structures.
	160	*/
	161	unsigned long status;
	162	int act_len; /* transfered bytes */
	163	int maxchild; /* Number of ports if hub */
	164	struct usb_device *parent;
	165	struct usb_device *children[USB_MAXCHILDREN];
	166	};
	167
	168	/**********************************************************************
	169	* this is how the lowlevel part communicate with the outer world
	170	*/
	171
149dded2	172	#if defined(CONFIG_USB_UHCI) \|\| defined(CONFIG_USB_OHCI)
012771d8 WD	173	int usb_lowlevel_init(void);
	174	int usb_lowlevel_stop(void);
	175	int submit_bulk_msg(struct usb_device dev, unsigned long pipe, void buffer,int transfer_len);
	176	int submit_control_msg(struct usb_device dev, unsigned long pipe, void buffer,
	177	int transfer_len,struct devrequest *setup);
	178	int submit_int_msg(struct usb_device dev, unsigned long pipe, void buffer,
	179	int transfer_len, int interval);
	180
	181	/* Defines */
	182	#define USB_UHCI_VEND_ID 0x8086
	183	#define USB_UHCI_DEV_ID 0x7112
	184
	185	#else
	186	#error USB Lowlevel not defined
	187	#endif
	188
	189	#ifdef CONFIG_USB_STORAGE
	190
	191	#define USB_MAX_STOR_DEV 5
	192	block_dev_desc_t *usb_stor_get_dev(int index);
	193	int usb_stor_scan(int mode);
	194
	195	#endif
	196
	197	#ifdef CONFIG_USB_KEYBOARD
	198
	199	int drv_usb_kbd_init(void);
	200	int usb_kbd_deregister(void);
	201
	202	#endif
	203	/* routines */
	204	int usb_init(void); /* initialize the USB Controller */
	205	int usb_stop(void); /* stop the USB Controller */
	206
	207
	208	int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
	209	int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id);
	210	struct usb_device * usb_get_dev_index(int index);
	211	int usb_control_msg(struct usb_device *dev, unsigned int pipe,
	212	unsigned char request, unsigned char requesttype,
	213	unsigned short value, unsigned short index,
	214	void *data, unsigned short size, int timeout);
	215	int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
	216	void data, int len, int actual_length, int timeout);
	217	int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
	218	void *buffer,int transfer_len, int interval);
	219	void usb_disable_asynch(int disable);
	220	int usb_maxpacket(struct usb_device *dev,unsigned long pipe);
	221	void __inline__ wait_ms(unsigned long ms);
	222	int usb_get_configuration_no(struct usb_device dev,unsigned char buffer,int cfgno);
	223	int usb_get_report(struct usb_device dev, int ifnum, unsigned char type, unsigned char id, void buf, int size);
	224	int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
	225	unsigned char type, unsigned char id, void *buf, int size);
	226	int usb_clear_halt(struct usb_device *dev, int pipe);
	227	int usb_string(struct usb_device dev, int index, char buf, size_t size);
	228	int usb_set_interface(struct usb_device *dev, int interface, int alternate);
	229
	230	/* big endian -> little endian conversion */
149dded2 WD	231	/* some CPUs are already little endian e.g. the ARM920T */
	232	#ifdef LITTLEENDIAN
	233	#define swap_16(x) ((unsigned short)(x))
	234	#define swap_32(x) ((unsigned long)(x))
	235	#else
012771d8	236	#define swap_16(x) \
3f85ce27 WD	237	({ unsigned short x_ = (unsigned short)x; \
	238	(unsigned short)( \
	239	((x_ & 0x00FFU) << 8) \| ((x_ & 0xFF00U) >> 8) ); \
	240	})
012771d8	241	#define swap_32(x) \
3f85ce27 WD	242	({ unsigned long x_ = (unsigned long)x; \
	243	(unsigned long)( \
	244	((x_ & 0x000000FFUL) << 24) \| \
	245	((x_ & 0x0000FF00UL) << 8) \| \
	246	((x_ & 0x00FF0000UL) >> 8) \| \
	247	((x_ & 0xFF000000UL) >> 24) ); \
	248	})
149dded2	249	#endif /* LITTLEENDIAN */
012771d8 WD	250
	251	/*
	252	* Calling this entity a "pipe" is glorifying it. A USB pipe
	253	* is something embarrassingly simple: it basically consists
	254	* of the following information:
	255	* - device number (7 bits)
	256	* - endpoint number (4 bits)
	257	* - current Data0/1 state (1 bit)
	258	* - direction (1 bit)
	259	* - speed (1 bit)
	260	* - max packet size (2 bits: 8, 16, 32 or 64)
	261	* - pipe type (2 bits: control, interrupt, bulk, isochronous)
	262	*
	263	* That's 18 bits. Really. Nothing more. And the USB people have
	264	* documented these eighteen bits as some kind of glorious
	265	* virtual data structure.
	266	*
	267	* Let's not fall in that trap. We'll just encode it as a simple
	268	* unsigned int. The encoding is:
	269	*
	270	* - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64)
	271	* - direction: bit 7 (0 = Host-to-Device [Out], 1 = Device-to-Host [In])
	272	* - device: bits 8-14
	273	* - endpoint: bits 15-18
	274	* - Data0/1: bit 19
	275	* - speed: bit 26 (0 = Full, 1 = Low Speed)
	276	* - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt, 10 = control, 11 = bulk)
	277	*
	278	* Why? Because it's arbitrary, and whatever encoding we select is really
	279	* up to us. This one happens to share a lot of bit positions with the UHCI
	280	* specification, so that much of the uhci driver can just mask the bits
	281	* appropriately.
	282	*/
	283	/* Create various pipes... */
	284	#define create_pipe(dev,endpoint) \
	285	(((dev)->devnum << 8) \| (endpoint << 15) \| ((dev)->slow << 26) \| (dev)->maxpacketsize)
	286	#define default_pipe(dev) ((dev)->slow <<26)
	287
	288	#define usb_sndctrlpipe(dev,endpoint) ((PIPE_CONTROL << 30) \| create_pipe(dev,endpoint))
	289	#define usb_rcvctrlpipe(dev,endpoint) ((PIPE_CONTROL << 30) \| create_pipe(dev,endpoint) \| USB_DIR_IN)
	290	#define usb_sndisocpipe(dev,endpoint) ((PIPE_ISOCHRONOUS << 30) \| create_pipe(dev,endpoint))
	291	#define usb_rcvisocpipe(dev,endpoint) ((PIPE_ISOCHRONOUS << 30) \| create_pipe(dev,endpoint) \| USB_DIR_IN)
	292	#define usb_sndbulkpipe(dev,endpoint) ((PIPE_BULK << 30) \| create_pipe(dev,endpoint))
	293	#define usb_rcvbulkpipe(dev,endpoint) ((PIPE_BULK << 30) \| create_pipe(dev,endpoint) \| USB_DIR_IN)
	294	#define usb_sndintpipe(dev,endpoint) ((PIPE_INTERRUPT << 30) \| create_pipe(dev,endpoint))
	295	#define usb_rcvintpipe(dev,endpoint) ((PIPE_INTERRUPT << 30) \| create_pipe(dev,endpoint) \| USB_DIR_IN)
	296	#define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) \| default_pipe(dev))
	297	#define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) \| default_pipe(dev) \| USB_DIR_IN)
	298
	299	/* The D0/D1 toggle bits */
	300	#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
	301	#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
	302	#define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << ep)) \| ((bit) << ep))
	303
	304	/* Endpoint halt control/status */
	305	#define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
	306	#define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] \|= (1 << (ep)))
	307	#define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
	308	#define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
	309
	310	#define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : USB_PID_OUT)
	311
	312	#define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
	313	#define usb_pipein(pipe) (((pipe) >> 7) & 1)
314	#define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
315	#define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
316	#define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
317	#define usb_pipedata(pipe) (((pipe) >> 19) & 1)
318	#define usb_pipeslow(pipe) (((pipe) >> 26) & 1)
319	#define usb_pipetype(pipe) (((pipe) >> 30) & 3)
320	#define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
321	#define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
322	#define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
323	#define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
324
325
326	/*************************************************************************
327	* Hub Stuff
328	*/
329	struct usb_port_status {
330	unsigned short wPortStatus;
331	unsigned short wPortChange;
332	} __attribute__ ((packed));
333
334	struct usb_hub_status {
335	unsigned short wHubStatus;
336	unsigned short wHubChange;
337	} __attribute__ ((packed));
338
339
340	/* Hub descriptor */
341	struct usb_hub_descriptor {
342	unsigned char bLength;
343	unsigned char bDescriptorType;
344	unsigned char bNbrPorts;
345	unsigned short wHubCharacteristics;
346	unsigned char bPwrOn2PwrGood;
347	unsigned char bHubContrCurrent;
348	unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
349	unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
350	/* DeviceRemovable and PortPwrCtrlMask want to be variable-length
351	bitmaps that hold max 255 entries. (bit0 is ignored) */
352	} __attribute__ ((packed));
353
354
355	struct usb_hub_device {
356	struct usb_device *pusb_dev;
357	struct usb_hub_descriptor desc;
358	};
359
360	#endif /_USB_H_ /