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Diffstat (limited to 'include/usb.h')
| -rw-r--r-- | include/usb.h | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/include/usb.h b/include/usb.h new file mode 100644 index 0000000..c3cc890 --- /dev/null +++ b/include/usb.h @@ -0,0 +1,352 @@ +/* + * (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_ */ |