/* * (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_ */