upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
615 lines
17 KiB
615 lines
17 KiB
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* storage_common.c -- Common definitions for mass storage functionality
|
|
*
|
|
* Copyright (C) 2003-2008 Alan Stern
|
|
* Copyeight (C) 2009 Samsung Electronics
|
|
* Author: Michal Nazarewicz (m.nazarewicz@samsung.com)
|
|
*
|
|
* Ported to u-boot:
|
|
* Andrzej Pietrasiewicz <andrzej.p@samsung.com>
|
|
*
|
|
* Code refactoring & cleanup:
|
|
* Łukasz Majewski <l.majewski@samsung.com>
|
|
*/
|
|
|
|
|
|
/*
|
|
* This file requires the following identifiers used in USB strings to
|
|
* be defined (each of type pointer to char):
|
|
* - fsg_string_manufacturer -- name of the manufacturer
|
|
* - fsg_string_product -- name of the product
|
|
* - fsg_string_serial -- product's serial
|
|
* - fsg_string_config -- name of the configuration
|
|
* - fsg_string_interface -- name of the interface
|
|
* The first four are only needed when FSG_DESCRIPTORS_DEVICE_STRINGS
|
|
* macro is defined prior to including this file.
|
|
*/
|
|
|
|
/*
|
|
* When FSG_NO_INTR_EP is defined fsg_fs_intr_in_desc and
|
|
* fsg_hs_intr_in_desc objects as well as
|
|
* FSG_FS_FUNCTION_PRE_EP_ENTRIES and FSG_HS_FUNCTION_PRE_EP_ENTRIES
|
|
* macros are not defined.
|
|
*
|
|
* When FSG_NO_DEVICE_STRINGS is defined FSG_STRING_MANUFACTURER,
|
|
* FSG_STRING_PRODUCT, FSG_STRING_SERIAL and FSG_STRING_CONFIG are not
|
|
* defined (as well as corresponding entries in string tables are
|
|
* missing) and FSG_STRING_INTERFACE has value of zero.
|
|
*
|
|
* When FSG_NO_OTG is defined fsg_otg_desc won't be defined.
|
|
*/
|
|
|
|
/*
|
|
* When FSG_BUFFHD_STATIC_BUFFER is defined when this file is included
|
|
* the fsg_buffhd structure's buf field will be an array of FSG_BUFLEN
|
|
* characters rather then a pointer to void.
|
|
*/
|
|
|
|
|
|
/* #include <asm/unaligned.h> */
|
|
|
|
|
|
/*
|
|
* Thanks to NetChip Technologies for donating this product ID.
|
|
*
|
|
* DO NOT REUSE THESE IDs with any other driver!! Ever!!
|
|
* Instead: allocate your own, using normal USB-IF procedures.
|
|
*/
|
|
#define FSG_VENDOR_ID 0x0525 /* NetChip */
|
|
#define FSG_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#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 LDBG(lun, fmt, args...) dev_dbg (&(lun)->dev, fmt, ## args)
|
|
#define LERROR(lun, fmt, args...) dev_err (&(lun)->dev, fmt, ## args)
|
|
#define LWARN(lun, fmt, args...) dev_warn(&(lun)->dev, fmt, ## args)
|
|
#define LINFO(lun, fmt, args...) dev_info(&(lun)->dev, fmt, ## args)
|
|
*/
|
|
|
|
#define LDBG(lun, fmt, args...) do { } while (0)
|
|
#define LERROR(lun, fmt, args...) do { } while (0)
|
|
#define LWARN(lun, fmt, args...) do { } while (0)
|
|
#define LINFO(lun, fmt, args...) do { } while (0)
|
|
|
|
/*
|
|
* Keep those macros in sync with those in
|
|
* include/linux/usb/composite.h or else GCC will complain. If they
|
|
* are identical (the same names of arguments, white spaces in the
|
|
* same places) GCC will allow redefinition otherwise (even if some
|
|
* white space is removed or added) warning will be issued.
|
|
*
|
|
* Those macros are needed here because File Storage Gadget does not
|
|
* include the composite.h header. For composite gadgets those macros
|
|
* are redundant since composite.h is included any way.
|
|
*
|
|
* One could check whether those macros are already defined (which
|
|
* would indicate composite.h had been included) or not (which would
|
|
* indicate we were in FSG) but this is not done because a warning is
|
|
* desired if definitions here differ from the ones in composite.h.
|
|
*
|
|
* We want the definitions to match and be the same in File Storage
|
|
* Gadget as well as Mass Storage Function (and so composite gadgets
|
|
* using MSF). If someone changes them in composite.h it will produce
|
|
* a warning in this file when building MSF.
|
|
*/
|
|
|
|
#define DBG(d, fmt, args...) debug(fmt , ## args)
|
|
#define VDBG(d, fmt, args...) debug(fmt , ## args)
|
|
/* #define ERROR(d, fmt, args...) printf(fmt , ## args) */
|
|
/* #define WARNING(d, fmt, args...) printf(fmt , ## args) */
|
|
/* #define INFO(d, fmt, args...) printf(fmt , ## args) */
|
|
|
|
/* #define DBG(d, fmt, args...) do { } while (0) */
|
|
/* #define VDBG(d, fmt, args...) do { } while (0) */
|
|
#define ERROR(d, fmt, args...) do { } while (0)
|
|
#define WARNING(d, fmt, args...) do { } while (0)
|
|
#define INFO(d, fmt, args...) do { } while (0)
|
|
|
|
#ifdef DUMP_MSGS
|
|
|
|
/* dump_msg(fsg, const char * label, const u8 * buf, unsigned length); */
|
|
# define dump_msg(fsg, label, buf, length) do { \
|
|
if (length < 512) { \
|
|
DBG(fsg, "%s, length %u:\n", label, length); \
|
|
print_hex_dump("", 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("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 */
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* SCSI device types */
|
|
#define TYPE_DISK 0x00
|
|
#define TYPE_CDROM 0x05
|
|
|
|
/* USB protocol value = the transport method */
|
|
#define USB_PR_CBI 0x00 /* Control/Bulk/Interrupt */
|
|
#define USB_PR_CB 0x01 /* Control/Bulk w/o interrupt */
|
|
#define USB_PR_BULK 0x50 /* Bulk-only */
|
|
|
|
/* USB subclass value = the protocol encapsulation */
|
|
#define USB_SC_RBC 0x01 /* Reduced Block Commands (flash) */
|
|
#define USB_SC_8020 0x02 /* SFF-8020i, MMC-2, ATAPI (CD-ROM) */
|
|
#define USB_SC_QIC 0x03 /* QIC-157 (tape) */
|
|
#define USB_SC_UFI 0x04 /* UFI (floppy) */
|
|
#define USB_SC_8070 0x05 /* SFF-8070i (removable) */
|
|
#define USB_SC_SCSI 0x06 /* Transparent SCSI */
|
|
|
|
/* Bulk-only data structures */
|
|
|
|
/* Command Block Wrapper */
|
|
struct fsg_bulk_cb_wrap {
|
|
__le32 Signature; /* Contains 'USBC' */
|
|
u32 Tag; /* Unique per command id */
|
|
__le32 DataTransferLength; /* Size of the data */
|
|
u8 Flags; /* Direction in bit 7 */
|
|
u8 Lun; /* LUN (normally 0) */
|
|
u8 Length; /* Of the CDB, <= MAX_COMMAND_SIZE */
|
|
u8 CDB[16]; /* Command Data Block */
|
|
};
|
|
|
|
#define USB_BULK_CB_WRAP_LEN 31
|
|
#define USB_BULK_CB_SIG 0x43425355 /* Spells out USBC */
|
|
#define USB_BULK_IN_FLAG 0x80
|
|
|
|
/* Command Status Wrapper */
|
|
struct bulk_cs_wrap {
|
|
__le32 Signature; /* Should = 'USBS' */
|
|
u32 Tag; /* Same as original command */
|
|
__le32 Residue; /* Amount not transferred */
|
|
u8 Status; /* See below */
|
|
};
|
|
|
|
#define USB_BULK_CS_WRAP_LEN 13
|
|
#define USB_BULK_CS_SIG 0x53425355 /* Spells out 'USBS' */
|
|
#define USB_STATUS_PASS 0
|
|
#define USB_STATUS_FAIL 1
|
|
#define USB_STATUS_PHASE_ERROR 2
|
|
|
|
/* Bulk-only class specific requests */
|
|
#define USB_BULK_RESET_REQUEST 0xff
|
|
#define USB_BULK_GET_MAX_LUN_REQUEST 0xfe
|
|
|
|
/* CBI Interrupt data structure */
|
|
struct interrupt_data {
|
|
u8 bType;
|
|
u8 bValue;
|
|
};
|
|
|
|
#define CBI_INTERRUPT_DATA_LEN 2
|
|
|
|
/* CBI Accept Device-Specific Command request */
|
|
#define USB_CBI_ADSC_REQUEST 0x00
|
|
|
|
/* Length of a SCSI Command Data Block */
|
|
#define MAX_COMMAND_SIZE 16
|
|
|
|
/* SCSI commands that we recognize */
|
|
#define SC_FORMAT_UNIT 0x04
|
|
#define SC_INQUIRY 0x12
|
|
#define SC_MODE_SELECT_6 0x15
|
|
#define SC_MODE_SELECT_10 0x55
|
|
#define SC_MODE_SENSE_6 0x1a
|
|
#define SC_MODE_SENSE_10 0x5a
|
|
#define SC_PREVENT_ALLOW_MEDIUM_REMOVAL 0x1e
|
|
#define SC_READ_6 0x08
|
|
#define SC_READ_10 0x28
|
|
#define SC_READ_12 0xa8
|
|
#define SC_READ_CAPACITY 0x25
|
|
#define SC_READ_FORMAT_CAPACITIES 0x23
|
|
#define SC_READ_HEADER 0x44
|
|
#define SC_READ_TOC 0x43
|
|
#define SC_RELEASE 0x17
|
|
#define SC_REQUEST_SENSE 0x03
|
|
#define SC_RESERVE 0x16
|
|
#define SC_SEND_DIAGNOSTIC 0x1d
|
|
#define SC_START_STOP_UNIT 0x1b
|
|
#define SC_SYNCHRONIZE_CACHE 0x35
|
|
#define SC_TEST_UNIT_READY 0x00
|
|
#define SC_VERIFY 0x2f
|
|
#define SC_WRITE_6 0x0a
|
|
#define SC_WRITE_10 0x2a
|
|
#define SC_WRITE_12 0xaa
|
|
|
|
/* 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 device_attribute { int i; };
|
|
#define ETOOSMALL 525
|
|
|
|
#include <usb_mass_storage.h>
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
struct fsg_lun {
|
|
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;
|
|
|
|
struct device dev;
|
|
};
|
|
|
|
#define fsg_lun_is_open(curlun) ((curlun)->filp != NULL)
|
|
#if 0
|
|
static struct fsg_lun *fsg_lun_from_dev(struct device *dev)
|
|
{
|
|
return container_of(dev, struct fsg_lun, dev);
|
|
}
|
|
#endif
|
|
|
|
/* Big enough to hold our biggest descriptor */
|
|
#define EP0_BUFSIZE 256
|
|
#define DELAYED_STATUS (EP0_BUFSIZE + 999) /* An impossibly large value */
|
|
|
|
/* Number of buffers we will use. 2 is enough for double-buffering */
|
|
#define FSG_NUM_BUFFERS 2
|
|
|
|
/* Default size of buffer length. */
|
|
#define FSG_BUFLEN ((u32)131072)
|
|
|
|
/* Maximal number of LUNs supported in mass storage function */
|
|
#define FSG_MAX_LUNS 8
|
|
|
|
enum fsg_buffer_state {
|
|
BUF_STATE_EMPTY = 0,
|
|
BUF_STATE_FULL,
|
|
BUF_STATE_BUSY
|
|
};
|
|
|
|
struct fsg_buffhd {
|
|
#ifdef FSG_BUFFHD_STATIC_BUFFER
|
|
char buf[FSG_BUFLEN];
|
|
#else
|
|
void *buf;
|
|
#endif
|
|
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);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
enum {
|
|
#ifndef FSG_NO_DEVICE_STRINGS
|
|
FSG_STRING_MANUFACTURER = 1,
|
|
FSG_STRING_PRODUCT,
|
|
FSG_STRING_SERIAL,
|
|
FSG_STRING_CONFIG,
|
|
#endif
|
|
FSG_STRING_INTERFACE
|
|
};
|
|
|
|
#ifndef FSG_NO_OTG
|
|
static struct usb_otg_descriptor
|
|
fsg_otg_desc = {
|
|
.bLength = sizeof fsg_otg_desc,
|
|
.bDescriptorType = USB_DT_OTG,
|
|
|
|
.bmAttributes = USB_OTG_SRP,
|
|
};
|
|
#endif
|
|
|
|
/* There is only one interface. */
|
|
|
|
static struct usb_interface_descriptor
|
|
fsg_intf_desc = {
|
|
.bLength = sizeof fsg_intf_desc,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bNumEndpoints = 2, /* Adjusted during fsg_bind() */
|
|
.bInterfaceClass = USB_CLASS_MASS_STORAGE,
|
|
.bInterfaceSubClass = USB_SC_SCSI, /* Adjusted during fsg_bind() */
|
|
.bInterfaceProtocol = USB_PR_BULK, /* Adjusted during fsg_bind() */
|
|
.iInterface = FSG_STRING_INTERFACE,
|
|
};
|
|
|
|
/*
|
|
* Three full-speed endpoint descriptors: bulk-in, bulk-out, and
|
|
* interrupt-in.
|
|
*/
|
|
|
|
static struct usb_endpoint_descriptor
|
|
fsg_fs_bulk_in_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bEndpointAddress = USB_DIR_IN,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
/* wMaxPacketSize set by autoconfiguration */
|
|
};
|
|
|
|
static struct usb_endpoint_descriptor
|
|
fsg_fs_bulk_out_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bEndpointAddress = USB_DIR_OUT,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
/* wMaxPacketSize set by autoconfiguration */
|
|
};
|
|
|
|
#ifndef FSG_NO_INTR_EP
|
|
|
|
static struct usb_endpoint_descriptor
|
|
fsg_fs_intr_in_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bEndpointAddress = USB_DIR_IN,
|
|
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
|
.wMaxPacketSize = cpu_to_le16(2),
|
|
.bInterval = 32, /* frames -> 32 ms */
|
|
};
|
|
|
|
#ifndef FSG_NO_OTG
|
|
# define FSG_FS_FUNCTION_PRE_EP_ENTRIES 2
|
|
#else
|
|
# define FSG_FS_FUNCTION_PRE_EP_ENTRIES 1
|
|
#endif
|
|
|
|
#endif
|
|
|
|
static struct usb_descriptor_header *fsg_fs_function[] = {
|
|
#ifndef FSG_NO_OTG
|
|
(struct usb_descriptor_header *) &fsg_otg_desc,
|
|
#endif
|
|
(struct usb_descriptor_header *) &fsg_intf_desc,
|
|
(struct usb_descriptor_header *) &fsg_fs_bulk_in_desc,
|
|
(struct usb_descriptor_header *) &fsg_fs_bulk_out_desc,
|
|
#ifndef FSG_NO_INTR_EP
|
|
(struct usb_descriptor_header *) &fsg_fs_intr_in_desc,
|
|
#endif
|
|
NULL,
|
|
};
|
|
|
|
/*
|
|
* USB 2.0 devices need to expose both high speed and full speed
|
|
* descriptors, unless they only run at full speed.
|
|
*
|
|
* That means alternate endpoint descriptors (bigger packets)
|
|
* and a "device qualifier" ... plus more construction options
|
|
* for the configuration descriptor.
|
|
*/
|
|
static struct usb_endpoint_descriptor
|
|
fsg_hs_bulk_in_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
/* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
.wMaxPacketSize = cpu_to_le16(512),
|
|
};
|
|
|
|
static struct usb_endpoint_descriptor
|
|
fsg_hs_bulk_out_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
/* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
.wMaxPacketSize = cpu_to_le16(512),
|
|
.bInterval = 1, /* NAK every 1 uframe */
|
|
};
|
|
|
|
#ifndef FSG_NO_INTR_EP
|
|
|
|
static struct usb_endpoint_descriptor
|
|
fsg_hs_intr_in_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
/* bEndpointAddress copied from fs_intr_in_desc during fsg_bind() */
|
|
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
|
.wMaxPacketSize = cpu_to_le16(2),
|
|
.bInterval = 9, /* 2**(9-1) = 256 uframes -> 32 ms */
|
|
};
|
|
|
|
#ifndef FSG_NO_OTG
|
|
# define FSG_HS_FUNCTION_PRE_EP_ENTRIES 2
|
|
#else
|
|
# define FSG_HS_FUNCTION_PRE_EP_ENTRIES 1
|
|
#endif
|
|
|
|
#endif
|
|
|
|
static struct usb_descriptor_header *fsg_hs_function[] = {
|
|
#ifndef FSG_NO_OTG
|
|
(struct usb_descriptor_header *) &fsg_otg_desc,
|
|
#endif
|
|
(struct usb_descriptor_header *) &fsg_intf_desc,
|
|
(struct usb_descriptor_header *) &fsg_hs_bulk_in_desc,
|
|
(struct usb_descriptor_header *) &fsg_hs_bulk_out_desc,
|
|
#ifndef FSG_NO_INTR_EP
|
|
(struct usb_descriptor_header *) &fsg_hs_intr_in_desc,
|
|
#endif
|
|
NULL,
|
|
};
|
|
|
|
/* Maxpacket and other transfer characteristics vary by speed. */
|
|
static struct usb_endpoint_descriptor *
|
|
fsg_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
|
|
struct usb_endpoint_descriptor *hs)
|
|
{
|
|
if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
|
|
return hs;
|
|
return fs;
|
|
}
|
|
|
|
/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */
|
|
static struct usb_string fsg_strings[] = {
|
|
#ifndef FSG_NO_DEVICE_STRINGS
|
|
{FSG_STRING_MANUFACTURER, fsg_string_manufacturer},
|
|
{FSG_STRING_PRODUCT, fsg_string_product},
|
|
{FSG_STRING_SERIAL, fsg_string_serial},
|
|
{FSG_STRING_CONFIG, fsg_string_config},
|
|
#endif
|
|
{FSG_STRING_INTERFACE, fsg_string_interface},
|
|
{}
|
|
};
|
|
|
|
static struct usb_gadget_strings fsg_stringtab = {
|
|
.language = 0x0409, /* en-us */
|
|
.strings = fsg_strings,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* If the next two routines are called while the gadget is registered,
|
|
* the caller must own fsg->filesem for writing.
|
|
*/
|
|
|
|
static int fsg_lun_open(struct fsg_lun *curlun, unsigned int num_sectors,
|
|
const char *filename)
|
|
{
|
|
int ro;
|
|
|
|
/* R/W if we can, R/O if we must */
|
|
ro = curlun->initially_ro;
|
|
|
|
curlun->ro = ro;
|
|
curlun->file_length = num_sectors << 9;
|
|
curlun->num_sectors = num_sectors;
|
|
debug("open backing file: %s\n", filename);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fsg_lun_close(struct fsg_lun *curlun)
|
|
{
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* Sync the file data, don't bother with the metadata.
|
|
* This code was copied from fs/buffer.c:sys_fdatasync().
|
|
*/
|
|
static int fsg_lun_fsync_sub(struct fsg_lun *curlun)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void store_cdrom_address(u8 *dest, int msf, u32 addr)
|
|
{
|
|
if (msf) {
|
|
/* Convert to Minutes-Seconds-Frames */
|
|
addr >>= 2; /* Convert to 2048-byte frames */
|
|
addr += 2*75; /* Lead-in occupies 2 seconds */
|
|
dest[3] = addr % 75; /* Frames */
|
|
addr /= 75;
|
|
dest[2] = addr % 60; /* Seconds */
|
|
addr /= 60;
|
|
dest[1] = addr; /* Minutes */
|
|
dest[0] = 0; /* Reserved */
|
|
} else {
|
|
/* Absolute sector */
|
|
put_unaligned_be32(addr, dest);
|
|
}
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|