Release 4.7 drivers/usb/gadget/function/storage_common.h

#ifndef USB_STORAGE_COMMON_H

#define USB_STORAGE_COMMON_H

#include <linux/device.h>
#include <linux/usb/storage.h>
#include <scsi/scsi.h>
#include <asm/unaligned.h>

#ifndef DEBUG

#undef VERBOSE_DEBUG

#undef DUMP_MSGS
#endif /* !DEBUG */

#ifdef VERBOSE_DEBUG

#define VLDBG	LDBG
#else

#define VLDBG(lun, fmt, args...) do { } while (0)
#endif /* VERBOSE_DEBUG */


#define _LMSG(func, lun, fmt, args...)					\
	do {                                                            \
                if ((lun)->name_pfx && *(lun)->name_pfx)                \
                        func("%s/%s: " fmt, *(lun)->name_pfx,           \
                                 (lun)->name, ## args);                 \
                else                                                    \
                        func("%s: " fmt, (lun)->name, ## args);         \
        } while (0)


#define LDBG(lun, fmt, args...)		_LMSG(pr_debug, lun, fmt, ## args)

#define LERROR(lun, fmt, args...)	_LMSG(pr_err, lun, fmt, ## args)

#define LWARN(lun, fmt, args...)	_LMSG(pr_warn, lun, fmt, ## args)

#define LINFO(lun, fmt, args...)	_LMSG(pr_info, lun, fmt, ## args)


#ifdef DUMP_MSGS


#  define dump_msg(fsg, /* const char * */ label,                       \
		   /* const u8 * */ buf, /* unsigned */ length)		\
do {                                                                    \
        if (length < 512) {                                             \
                DBG(fsg, "%s, length %u:\n", label, length);            \
                print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,      \
                               16, 1, buf, length, 0);                  \
        }                                                               \
} while (0)


#  define dump_cdb(fsg) do { } while (0)

#else


#  define dump_msg(fsg, /* const char * */ label, \
		   /* const u8 * */ buf, /* unsigned */ length) do { } while (0)

#  ifdef VERBOSE_DEBUG


#    define dump_cdb(fsg)						\
	print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE,      \
                       16, 1, (fsg)->cmnd, (fsg)->cmnd_size, 0)         \

#  else


#    define dump_cdb(fsg) do { } while (0)

#  endif /* VERBOSE_DEBUG */

#endif /* DUMP_MSGS */

/* Length of a SCSI Command Data Block */

#define MAX_COMMAND_SIZE	16

/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */

#define SS_NO_SENSE				0

#define SS_COMMUNICATION_FAILURE		0x040800

#define SS_INVALID_COMMAND			0x052000

#define SS_INVALID_FIELD_IN_CDB			0x052400

#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE	0x052100

#define SS_LOGICAL_UNIT_NOT_SUPPORTED		0x052500

#define SS_MEDIUM_NOT_PRESENT			0x023a00

#define SS_MEDIUM_REMOVAL_PREVENTED		0x055302

#define SS_NOT_READY_TO_READY_TRANSITION	0x062800

#define SS_RESET_OCCURRED			0x062900

#define SS_SAVING_PARAMETERS_NOT_SUPPORTED	0x053900

#define SS_UNRECOVERED_READ_ERROR		0x031100

#define SS_WRITE_ERROR				0x030c02

#define SS_WRITE_PROTECTED			0x072700


#define SK(x)		((u8) ((x) >> 16))	
/* Sense Key byte, etc. */

#define ASC(x)		((u8) ((x) >> 8))

#define ASCQ(x)		((u8) (x))


struct fsg_lun {
	
struct file	*filp;
	
loff_t		file_length;
	
loff_t		num_sectors;

	
unsigned int	initially_ro:1;
	
unsigned int	ro:1;
	
unsigned int	removable:1;
	
unsigned int	cdrom:1;
	
unsigned int	prevent_medium_removal:1;
	
unsigned int	registered:1;
	
unsigned int	info_valid:1;
	
unsigned int	nofua:1;

	
u32		sense_data;
	
u32		sense_data_info;
	
u32		unit_attention_data;

	
unsigned int	blkbits; /* Bits of logical block size
                                                       of bound block device */
	
unsigned int	blksize; /* logical block size of bound block device */
	
struct device	dev;
	
const char	*name;		/* "lun.name" */
	
const char	**name_pfx;	/* "function.name" */
};



static inline bool fsg_lun_is_open(struct fsg_lun *curlun)
{
	return curlun->filp != NULL;
}

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/* Default size of buffer length. */

#define FSG_BUFLEN	((u32)16384)

/* Maximal number of LUNs supported in mass storage function */

#define FSG_MAX_LUNS	16


enum fsg_buffer_state {
	
BUF_STATE_EMPTY = 0,
	
BUF_STATE_FULL,
	
BUF_STATE_BUSY
};


struct fsg_buffhd {
	
void				*buf;
	
enum fsg_buffer_state		state;
	
struct fsg_buffhd		*next;

	/*
         * The NetChip 2280 is faster, and handles some protocol faults
         * better, if we don't submit any short bulk-out read requests.
         * So we will record the intended request length here.
         */
	
unsigned int			bulk_out_intended_length;

	
struct usb_request		*inreq;
	
int				inreq_busy;
	
struct usb_request		*outreq;
	
int				outreq_busy;
};


enum fsg_state {
	/* This one isn't used anywhere */
	
FSG_STATE_COMMAND_PHASE = -10,
	
FSG_STATE_DATA_PHASE,
	
FSG_STATE_STATUS_PHASE,

	
FSG_STATE_IDLE = 0,
	
FSG_STATE_ABORT_BULK_OUT,
	
FSG_STATE_RESET,
	
FSG_STATE_INTERFACE_CHANGE,
	
FSG_STATE_CONFIG_CHANGE,
	
FSG_STATE_DISCONNECT,
	
FSG_STATE_EXIT,
	
FSG_STATE_TERMINATED
};


enum data_direction {
	
DATA_DIR_UNKNOWN = 0,
	
DATA_DIR_FROM_HOST,
	
DATA_DIR_TO_HOST,
	
DATA_DIR_NONE
};



static inline u32 get_unaligned_be24(u8 *buf)
{
	return 0xffffff & (u32) get_unaligned_be32(buf - 1);
}

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static inline struct fsg_lun *fsg_lun_from_dev(struct device *dev)
{
	return container_of(dev, struct fsg_lun, dev);
}

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enum {
	
FSG_STRING_INTERFACE
};

extern struct usb_interface_descriptor fsg_intf_desc;

extern struct usb_endpoint_descriptor fsg_fs_bulk_in_desc;
extern struct usb_endpoint_descriptor fsg_fs_bulk_out_desc;
extern struct usb_descriptor_header *fsg_fs_function[];

extern struct usb_endpoint_descriptor fsg_hs_bulk_in_desc;
extern struct usb_endpoint_descriptor fsg_hs_bulk_out_desc;
extern struct usb_descriptor_header *fsg_hs_function[];

extern struct usb_endpoint_descriptor fsg_ss_bulk_in_desc;
extern struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc;
extern struct usb_endpoint_descriptor fsg_ss_bulk_out_desc;
extern struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc;
extern struct usb_descriptor_header *fsg_ss_function[];

void fsg_lun_close(struct fsg_lun *curlun);
int fsg_lun_open(struct fsg_lun *curlun, const char *filename);
int fsg_lun_fsync_sub(struct fsg_lun *curlun);
void store_cdrom_address(u8 *dest, int msf, u32 addr);
ssize_t fsg_show_ro(struct fsg_lun *curlun, char *buf);
ssize_t fsg_show_nofua(struct fsg_lun *curlun, char *buf);
ssize_t fsg_show_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
		      char *buf);
ssize_t fsg_show_cdrom(struct fsg_lun *curlun, char *buf);
ssize_t fsg_show_removable(struct fsg_lun *curlun, char *buf);
ssize_t fsg_store_ro(struct fsg_lun *curlun, struct rw_semaphore *filesem,
		     const char *buf, size_t count);
ssize_t fsg_store_nofua(struct fsg_lun *curlun, const char *buf, size_t count);
ssize_t fsg_store_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
		       const char *buf, size_t count);
ssize_t fsg_store_cdrom(struct fsg_lun *curlun, struct rw_semaphore *filesem,
			const char *buf, size_t count);
ssize_t fsg_store_removable(struct fsg_lun *curlun, const char *buf,
			    size_t count);

#endif /* USB_STORAGE_COMMON_H */
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Directory: drivers/usb/gadget/function

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