211 lines
7.0 KiB
C
211 lines
7.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Driver for USB Mass Storage compliant devices
|
|
* Main Header File
|
|
*
|
|
* Current development and maintenance by:
|
|
* (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
|
|
*
|
|
* Initial work by:
|
|
* (c) 1999 Michael Gee (michael@linuxspecific.com)
|
|
*
|
|
* This driver is based on the 'USB Mass Storage Class' document. This
|
|
* describes in detail the protocol used to communicate with such
|
|
* devices. Clearly, the designers had SCSI and ATAPI commands in
|
|
* mind when they created this document. The commands are all very
|
|
* similar to commands in the SCSI-II and ATAPI specifications.
|
|
*
|
|
* It is important to note that in a number of cases this class
|
|
* exhibits class-specific exemptions from the USB specification.
|
|
* Notably the usage of NAK, STALL and ACK differs from the norm, in
|
|
* that they are used to communicate wait, failed and OK on commands.
|
|
*
|
|
* Also, for certain devices, the interrupt endpoint is used to convey
|
|
* status of a command.
|
|
*/
|
|
|
|
#ifndef _USB_H_
|
|
#define _USB_H_
|
|
|
|
#include <linux/usb.h>
|
|
#include <linux/usb_usual.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/workqueue.h>
|
|
#include <scsi/scsi_host.h>
|
|
|
|
struct us_data;
|
|
struct scsi_cmnd;
|
|
|
|
/*
|
|
* Unusual device list definitions
|
|
*/
|
|
|
|
struct us_unusual_dev {
|
|
const char* vendorName;
|
|
const char* productName;
|
|
__u8 useProtocol;
|
|
__u8 useTransport;
|
|
int (*initFunction)(struct us_data *);
|
|
};
|
|
|
|
|
|
/* Dynamic bitflag definitions (us->dflags): used in set_bit() etc. */
|
|
#define US_FLIDX_URB_ACTIVE 0 /* current_urb is in use */
|
|
#define US_FLIDX_SG_ACTIVE 1 /* current_sg is in use */
|
|
#define US_FLIDX_ABORTING 2 /* abort is in progress */
|
|
#define US_FLIDX_DISCONNECTING 3 /* disconnect in progress */
|
|
#define US_FLIDX_RESETTING 4 /* device reset in progress */
|
|
#define US_FLIDX_TIMED_OUT 5 /* SCSI midlayer timed out */
|
|
#define US_FLIDX_SCAN_PENDING 6 /* scanning not yet done */
|
|
#define US_FLIDX_REDO_READ10 7 /* redo READ(10) command */
|
|
#define US_FLIDX_READ10_WORKED 8 /* previous READ(10) succeeded */
|
|
|
|
#define USB_STOR_STRING_LEN 32
|
|
|
|
/*
|
|
* We provide a DMA-mapped I/O buffer for use with small USB transfers.
|
|
* It turns out that CB[I] needs a 12-byte buffer and Bulk-only needs a
|
|
* 31-byte buffer. But Freecom needs a 64-byte buffer, so that's the
|
|
* size we'll allocate.
|
|
*/
|
|
|
|
#define US_IOBUF_SIZE 64 /* Size of the DMA-mapped I/O buffer */
|
|
#define US_SENSE_SIZE 18 /* Size of the autosense data buffer */
|
|
|
|
typedef int (*trans_cmnd)(struct scsi_cmnd *, struct us_data*);
|
|
typedef int (*trans_reset)(struct us_data*);
|
|
typedef void (*proto_cmnd)(struct scsi_cmnd*, struct us_data*);
|
|
typedef void (*extra_data_destructor)(void *); /* extra data destructor */
|
|
typedef void (*pm_hook)(struct us_data *, int); /* power management hook */
|
|
|
|
#define US_SUSPEND 0
|
|
#define US_RESUME 1
|
|
|
|
/* we allocate one of these for every device that we remember */
|
|
struct us_data {
|
|
/*
|
|
* The device we're working with
|
|
* It's important to note:
|
|
* (o) you must hold dev_mutex to change pusb_dev
|
|
*/
|
|
struct mutex dev_mutex; /* protect pusb_dev */
|
|
struct usb_device *pusb_dev; /* this usb_device */
|
|
struct usb_interface *pusb_intf; /* this interface */
|
|
const struct us_unusual_dev *unusual_dev;
|
|
/* device-filter entry */
|
|
unsigned long fflags; /* fixed flags from filter */
|
|
unsigned long dflags; /* dynamic atomic bitflags */
|
|
unsigned int send_bulk_pipe; /* cached pipe values */
|
|
unsigned int recv_bulk_pipe;
|
|
unsigned int send_ctrl_pipe;
|
|
unsigned int recv_ctrl_pipe;
|
|
unsigned int recv_intr_pipe;
|
|
|
|
/* information about the device */
|
|
char *transport_name;
|
|
char *protocol_name;
|
|
__le32 bcs_signature;
|
|
u8 subclass;
|
|
u8 protocol;
|
|
u8 max_lun;
|
|
|
|
u8 ifnum; /* interface number */
|
|
u8 ep_bInterval; /* interrupt interval */
|
|
|
|
/* function pointers for this device */
|
|
trans_cmnd transport; /* transport function */
|
|
trans_reset transport_reset; /* transport device reset */
|
|
proto_cmnd proto_handler; /* protocol handler */
|
|
|
|
/* SCSI interfaces */
|
|
struct scsi_cmnd *srb; /* current srb */
|
|
unsigned int tag; /* current dCBWTag */
|
|
char scsi_name[32]; /* scsi_host name */
|
|
|
|
/* control and bulk communications data */
|
|
struct urb *current_urb; /* USB requests */
|
|
struct usb_ctrlrequest *cr; /* control requests */
|
|
struct usb_sg_request current_sg; /* scatter-gather req. */
|
|
unsigned char *iobuf; /* I/O buffer */
|
|
dma_addr_t iobuf_dma; /* buffer DMA addresses */
|
|
struct task_struct *ctl_thread; /* the control thread */
|
|
|
|
/* mutual exclusion and synchronization structures */
|
|
struct completion cmnd_ready; /* to sleep thread on */
|
|
struct completion notify; /* thread begin/end */
|
|
wait_queue_head_t delay_wait; /* wait during reset */
|
|
struct delayed_work scan_dwork; /* for async scanning */
|
|
|
|
/* subdriver information */
|
|
void *extra; /* Any extra data */
|
|
extra_data_destructor extra_destructor;/* extra data destructor */
|
|
#ifdef CONFIG_PM
|
|
pm_hook suspend_resume_hook;
|
|
#endif
|
|
|
|
/* hacks for READ CAPACITY bug handling */
|
|
int use_last_sector_hacks;
|
|
int last_sector_retries;
|
|
};
|
|
|
|
/* Convert between us_data and the corresponding Scsi_Host */
|
|
static inline struct Scsi_Host *us_to_host(struct us_data *us) {
|
|
return container_of((void *) us, struct Scsi_Host, hostdata);
|
|
}
|
|
static inline struct us_data *host_to_us(struct Scsi_Host *host) {
|
|
return (struct us_data *) host->hostdata;
|
|
}
|
|
|
|
/* Function to fill an inquiry response. See usb.c for details */
|
|
extern void fill_inquiry_response(struct us_data *us,
|
|
unsigned char *data, unsigned int data_len);
|
|
|
|
/*
|
|
* The scsi_lock() and scsi_unlock() macros protect the sm_state and the
|
|
* single queue element srb for write access
|
|
*/
|
|
#define scsi_unlock(host) spin_unlock_irq(host->host_lock)
|
|
#define scsi_lock(host) spin_lock_irq(host->host_lock)
|
|
|
|
/* General routines provided by the usb-storage standard core */
|
|
#ifdef CONFIG_PM
|
|
extern int usb_stor_suspend(struct usb_interface *iface, pm_message_t message);
|
|
extern int usb_stor_resume(struct usb_interface *iface);
|
|
extern int usb_stor_reset_resume(struct usb_interface *iface);
|
|
#else
|
|
#define usb_stor_suspend NULL
|
|
#define usb_stor_resume NULL
|
|
#define usb_stor_reset_resume NULL
|
|
#endif
|
|
|
|
extern int usb_stor_pre_reset(struct usb_interface *iface);
|
|
extern int usb_stor_post_reset(struct usb_interface *iface);
|
|
|
|
extern int usb_stor_probe1(struct us_data **pus,
|
|
struct usb_interface *intf,
|
|
const struct usb_device_id *id,
|
|
const struct us_unusual_dev *unusual_dev,
|
|
struct scsi_host_template *sht);
|
|
extern int usb_stor_probe2(struct us_data *us);
|
|
extern void usb_stor_disconnect(struct usb_interface *intf);
|
|
|
|
extern void usb_stor_adjust_quirks(struct usb_device *dev,
|
|
unsigned long *fflags);
|
|
|
|
#define module_usb_stor_driver(__driver, __sht, __name) \
|
|
static int __init __driver##_init(void) \
|
|
{ \
|
|
usb_stor_host_template_init(&(__sht), __name, THIS_MODULE); \
|
|
return usb_register(&(__driver)); \
|
|
} \
|
|
module_init(__driver##_init); \
|
|
static void __exit __driver##_exit(void) \
|
|
{ \
|
|
usb_deregister(&(__driver)); \
|
|
} \
|
|
module_exit(__driver##_exit)
|
|
|
|
#endif
|