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/*
* Copyright (c) 2001-2002 by David Brownell
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef __KERNEL__
/* This file contains declarations of usbcore internals that are mostly
* used or exposed by Host Controller Drivers.
*/
/*
* USB Packet IDs (PIDs)
*/
#define USB_PID_UNDEF_0 0xf0
#define USB_PID_OUT 0xe1
#define USB_PID_ACK 0xd2
#define USB_PID_DATA0 0xc3
#define USB_PID_PING 0xb4 /* USB 2.0 */
#define USB_PID_SOF 0xa5
#define USB_PID_NYET 0x96 /* USB 2.0 */
#define USB_PID_DATA2 0x87 /* USB 2.0 */
#define USB_PID_SPLIT 0x78 /* USB 2.0 */
#define USB_PID_IN 0x69
#define USB_PID_NAK 0x5a
#define USB_PID_DATA1 0x4b
#define USB_PID_PREAMBLE 0x3c /* Token mode */
#define USB_PID_ERR 0x3c /* USB 2.0: handshake mode */
#define USB_PID_SETUP 0x2d
#define USB_PID_STALL 0x1e
#define USB_PID_MDATA 0x0f /* USB 2.0 */
/*-------------------------------------------------------------------------*/
/*
* USB Host Controller Driver (usb_hcd) framework
*
* Since "struct usb_bus" is so thin, you can't share much code in it.
* This framework is a layer over that, and should be more sharable.
*/
/*-------------------------------------------------------------------------*/
struct usb_hcd { /* usb_bus.hcpriv points to this */
/*
* housekeeping
*/
struct usb_bus self; /* hcd is-a bus */
const char *product_desc; /* product/vendor string */
char irq_descr[24]; /* driver + bus # */
struct timer_list rh_timer; /* drives root hub */
/*
* hardware info/state
*/
const struct hc_driver *driver; /* hw-specific hooks */
unsigned saw_irq : 1;
unsigned can_wakeup:1; /* hw supports wakeup? */
unsigned remote_wakeup:1;/* sw should use wakeup? */
unsigned rh_registered:1;/* is root hub registered? */
int irq; /* irq allocated */
void __iomem *regs; /* device memory/io */
u64 rsrc_start; /* memory/io resource start */
u64 rsrc_len; /* memory/io resource length */
#define HCD_BUFFER_POOLS 4
struct dma_pool *pool [HCD_BUFFER_POOLS];
int state;
# define __ACTIVE 0x01
# define __SUSPEND 0x04
# define __TRANSIENT 0x80
# define HC_STATE_HALT 0
# define HC_STATE_RUNNING (__ACTIVE)
# define HC_STATE_QUIESCING (__SUSPEND|__TRANSIENT|__ACTIVE)
# define HC_STATE_RESUMING (__SUSPEND|__TRANSIENT)
# define HC_STATE_SUSPENDED (__SUSPEND)
#define HC_IS_RUNNING(state) ((state) & __ACTIVE)
#define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
/* more shared queuing code would be good; it should support
* smarter scheduling, handle transaction translators, etc;
* input size of periodic table to an interrupt scheduler.
* (ohci 32, uhci 1024, ehci 256/512/1024).
*/
/* The HC driver's private data is stored at the end of
* this structure.
*/
unsigned long hcd_priv[0]
__attribute__ ((aligned (sizeof(unsigned long))));
};
/* 2.4 does this a bit differently ... */
static inline struct usb_bus *hcd_to_bus (struct usb_hcd *hcd)
{
return &hcd->self;
}
// urb.hcpriv is really hardware-specific
struct hcd_timeout { /* timeouts we allocate */
struct list_head timeout_list;
struct timer_list timer;
};
/*-------------------------------------------------------------------------*/
/*
* FIXME usb_operations should vanish or become hc_driver,
* when usb_bus and usb_hcd become the same thing.
*/
struct usb_operations {
int (*get_frame_number) (struct usb_device *usb_dev);
int (*submit_urb) (struct urb *urb, int mem_flags);
int (*unlink_urb) (struct urb *urb, int status);
/* allocate dma-consistent buffer for URB_DMA_NOMAPPING */
void *(*buffer_alloc)(struct usb_bus *bus, size_t size,
int mem_flags,
dma_addr_t *dma);
void (*buffer_free)(struct usb_bus *bus, size_t size,
void *addr, dma_addr_t dma);
void (*disable)(struct usb_device *udev,
struct usb_host_endpoint *ep);
/* global suspend/resume of bus */
int (*hub_suspend)(struct usb_bus *);
int (*hub_resume)(struct usb_bus *);
};
/* each driver provides one of these, and hardware init support */
struct pt_regs;
struct hc_driver {
const char *description; /* "ehci-hcd" etc */
const char *product_desc; /* product/vendor string */
size_t hcd_priv_size; /* size of private data */
/* irq handler */
irqreturn_t (*irq) (struct usb_hcd *hcd, struct pt_regs *regs);
int flags;
#define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */
#define HCD_USB11 0x0010 /* USB 1.1 */
#define HCD_USB2 0x0020 /* USB 2.0 */
/* called to init HCD and root hub */
int (*reset) (struct usb_hcd *hcd);
int (*start) (struct usb_hcd *hcd);
/* NOTE: these suspend/resume calls relate to the HC as
* a whole, not just the root hub; they're for bus glue.
*/
/* called after all devices were suspended */
int (*suspend) (struct usb_hcd *hcd, pm_message_t message);
/* called before any devices get resumed */
int (*resume) (struct usb_hcd *hcd);
/* cleanly make HCD stop writing memory and doing I/O */
void (*stop) (struct usb_hcd *hcd);
/* return current frame number */
int (*get_frame_number) (struct usb_hcd *hcd);
/* manage i/o requests, device state */
int (*urb_enqueue) (struct usb_hcd *hcd,
struct usb_host_endpoint *ep,
struct urb *urb,
int mem_flags);
int (*urb_dequeue) (struct usb_hcd *hcd, struct urb *urb);
/* hw synch, freeing endpoint resources that urb_dequeue can't */
void (*endpoint_disable)(struct usb_hcd *hcd,
struct usb_host_endpoint *ep);
/* root hub support */
int (*hub_status_data) (struct usb_hcd *hcd, char *buf);
int (*hub_control) (struct usb_hcd *hcd,
u16 typeReq, u16 wValue, u16 wIndex,
char *buf, u16 wLength);
int (*hub_suspend)(struct usb_hcd *);
int (*hub_resume)(struct usb_hcd *);
int (*start_port_reset)(struct usb_hcd *, unsigned port_num);
};
extern void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb, struct pt_regs *regs);
extern struct usb_hcd *usb_create_hcd (const struct hc_driver *driver,
struct device *dev, char *bus_name);
extern void usb_put_hcd (struct usb_hcd *hcd);
extern int usb_add_hcd(struct usb_hcd *hcd,
unsigned int irqnum, unsigned long irqflags);
extern void usb_remove_hcd(struct usb_hcd *hcd);
#ifdef CONFIG_PCI
struct pci_dev;
struct pci_device_id;
extern int usb_hcd_pci_probe (struct pci_dev *dev,
const struct pci_device_id *id);
extern void usb_hcd_pci_remove (struct pci_dev *dev);
#ifdef CONFIG_PM
extern int usb_hcd_pci_suspend (struct pci_dev *dev, pm_message_t state);
extern int usb_hcd_pci_resume (struct pci_dev *dev);
#endif /* CONFIG_PM */
#endif /* CONFIG_PCI */
/* pci-ish (pdev null is ok) buffer alloc/mapping support */
int hcd_buffer_create (struct usb_hcd *hcd);
void hcd_buffer_destroy (struct usb_hcd *hcd);
void *hcd_buffer_alloc (struct usb_bus *bus, size_t size,
int mem_flags, dma_addr_t *dma);
void hcd_buffer_free (struct usb_bus *bus, size_t size,
void *addr, dma_addr_t dma);
/* generic bus glue, needed for host controllers that don't use PCI */
extern irqreturn_t usb_hcd_irq (int irq, void *__hcd, struct pt_regs *r);
extern void usb_hc_died (struct usb_hcd *hcd);
/* -------------------------------------------------------------------------- */
/* Enumeration is only for the hub driver, or HCD virtual root hubs */
extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
struct usb_bus *, unsigned port);
extern int usb_new_device(struct usb_device *dev);
extern void usb_disconnect(struct usb_device **);
extern int usb_get_configuration(struct usb_device *dev);
extern void usb_destroy_configuration(struct usb_device *dev);
/*-------------------------------------------------------------------------*/
/*
* HCD Root Hub support
*/
#include "hub.h"
/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
#define DeviceRequest \
((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
#define DeviceOutRequest \
((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
#define InterfaceRequest \
((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
#define EndpointRequest \
((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
#define EndpointOutRequest \
((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
/* class requests from the USB 2.0 hub spec, table 11-15 */
/* GetBusState and SetHubDescriptor are optional, omitted */
#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
/*-------------------------------------------------------------------------*/
/*
* Generic bandwidth allocation constants/support
*/
#define FRAME_TIME_USECS 1000L
#define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
/* Trying not to use worst-case bit-stuffing
of (7/6 * 8 * bytecount) = 9.33 * bytecount */
/* bytecount = data payload byte count */
#define NS_TO_US(ns) ((ns + 500L) / 1000L)
/* convert & round nanoseconds to microseconds */
extern void usb_claim_bandwidth (struct usb_device
|