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authorwdenk <wdenk>2002-03-08 21:31:05 +0000
committerwdenk <wdenk>2002-03-08 21:31:05 +0000
commit012771d88adfb5e0886591880041f05fc8b15bdd (patch)
tree9cd947b8b4c6f05cff5be1b69a0f1ca81b2c86ec /include/usb.h
parent67fc21f34ef642417e7418a0575d5b5ff70d77d8 (diff)
Initial revision
Diffstat (limited to 'include/usb.h')
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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_ */