Initial revision

1 files changed, 352 insertions, 0 deletions

diff --git a/include/usb.h b/include/usb.h
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+/*
+ * (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
+ */
+
+#ifdef CONFIG_USB_UHCI
+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 */
+#define swap_16(x) \
+	((unsigned short)( \
+		(((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \
+		(((unsigned short)(x) & (unsigned short)0xff00U) >> 8) ))
+#define swap_32(x) \
+	((unsigned long)( \
+		(((unsigned long)(x) & (unsigned long)0x000000ffUL) << 24) | \
+		(((unsigned long)(x) & (unsigned long)0x0000ff00UL) <<  8) | \
+		(((unsigned long)(x) & (unsigned long)0x00ff0000UL) >>  8) | \
+		(((unsigned long)(x) & (unsigned long)0xff000000UL) >> 24) ))
+
+/*
+ * 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_ */