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//==========================================================================

//

//      usb_test_ramdisk.c

//

//      Example application for the USB MSD layer in eCos.

//

//==========================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 2008 Free Software Foundation, Inc.

//

// eCos 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 or (at your option) any later

// version.

//

// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

//

// As a special exception, if other files instantiate templates or use

// macros or inline functions from this file, or you compile this file

// and link it with other works to produce a work based on this file,

// this file does not by itself cause the resulting work to be covered by

// the GNU General Public License. However the source code for this file

// must still be made available in accordance with section (3) of the GNU

// General Public License v2.

//

// This exception does not invalidate any other reasons why a work based

// on this file might be covered by the GNU General Public License.

// -------------------------------------------

// ####ECOSGPLCOPYRIGHTEND####

//===========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    ccoutand

// Contributors:

// Date:         2010-06-27

// Description:  USB Slave Mass Storage example application.

//

//####DESCRIPTIONEND####

//===========================================================================

#include <pkgconf/system.h>

#include <pkgconf/hal.h>

#if defined(CYGPKG_FS_FAT)

#include <pkgconf/io_fileio.h>

#include <pkgconf/fs_fat.h>

#endif

#include <pkgconf/io_usb_slave_msd.h>

#include <pkgconf/kernel.h>

#include <cyg/kernel/kapi.h>

#include <cyg/hal/hal_arch.h>

#include <cyg/infra/diag.h>

#include <cyg/io/usb/usbs_msd_io.h>

#include <cyg/io/io.h>

#include <cyg/io/devtab.h>

#include <cyg/io/disk.h>

#include <stdio.h>

#include <stdlib.h>

#if defined(CYGPKG_FS_FAT)

#include <cyg/infra/cyg_trac.h>

#include <cyg/infra/cyg_ass.h>

#include <cyg/infra/testcase.h>

#include <unistd.h>

#include <dirent.h>

#include <errno.h>

#include <cyg/fileio/fileio.h>

#include <cyg/fs/fatfs.h>

#endif

#if defined(CYGBLD_IO_USB_SLAVE_MSD_DEBUG)

#define DBG diag_printf

#else

#define DBG (1) ? (void)0 : diag_printf

#endif

// ----------------------------------------------------------------------------

// FAT12 file-system FBR, FAT and ROOT directory entries are hardcoded

// and later copied over to the RAM disk

//

#define USBS_MSD_RAMDISK_BLOCKLEN   512

#define USBS_MSD_RAMDISK_NUM_BLOCK   32

// Allocate space for the RAM disk

static char ram_disk[ USBS_MSD_RAMDISK_BLOCKLEN * USBS_MSD_RAMDISK_NUM_BLOCK ] __attribute__((aligned(4)));

// FAT12 Boot Record

const char fat12_br[] = {

   0xEB, 0x3C, 0x90,                               // Field for Bootable Media

   0x4D, 0x53, 0x57, 0x49, 0x4E, 0x34, 0x2E, 0x31, // MSWIN4.1

   0x00, 0x02,                                     // 512 bytes sector

   0x01,                                           // 1 sector per cluster

   0x01, 0x00,                                     // 1 reserved sector (including MBR)

   0x02,                                           // 2 FATs

   0x40, 0x00,                                     // 64 entries

   USBS_MSD_RAMDISK_NUM_BLOCK, 0x00,               // Number of sectors is less than 32K: 32 sectors

   0xF0,                                           // Removable media

   0x01, 0x00,                                     // 1sector per FAT

   0x00, 0x00,                                     // Sector per track (not used in LBA)

   0x00, 0x00,                                     // Number of Heads (not used in LBA)

   0x00, 0x00, 0x00, 0x00,                         // Hidden sector

   0x00, 0x00, 0x00, 0x00,                         // Number of sectors is more than 32K

   0x00,                                           // Logical drive number

   0x00,                                           // Reserved

   0x29,                                           // Extended boot signature

   0x04, 0x03, 0x02, 0x01,                         // Serial Number

   0x65, 0x43, 0x6F, 0x73, 0x20, 0x64, 0x69, 0x73, // VOLUME: eCos disk

   0x6B, 0x20, 0x20,

   0x46, 0x41, 0x54, 0x31, 0x32, 0x20, 0x20, 0x20  // FAT12

};

// MBR and Volume sector signature

const char mbr_signature[] = {

   0x55, 0xAA

};

// Partition table

const char partition_tbl[] = {

   // First (FAT12)

   0x80, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,

   0x01, 0x00, 0x00, 0x00, (USBS_MSD_RAMDISK_NUM_BLOCK-1), 0x00, 0x00, 0x00,

   // Second

   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

   // Third

   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

   // Fourth

   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00

};

// Root directory (eCos-3.0)

const char root_dir[] = {

   0x65, 0x43, 0x6F, 0x73, 0x2d, 0x33, 0x2e, 0x30,

   0x20, 0x20, 0x20, 0x28, 0x00, 0x00, 0x00, 0x00,

   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x91, 0x9e,

   0x65, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00

};

// File-system Allocation Table

const char fat[] = {

  0xF0, 0xff, 0xff

};

// Initialize FAT12

static void

init_fat12_disk( char *start_addr )

{

  char * dst = start_addr;

  // Copy partition table

  dst = start_addr + 446;

  memcpy(dst, partition_tbl, 64);

  // Copy signature

  dst = start_addr + (USBS_MSD_RAMDISK_BLOCKLEN - 2 );

  memcpy(dst, mbr_signature, 2);

  // Copy FBR

  dst = start_addr + USBS_MSD_RAMDISK_BLOCKLEN;

  memcpy(dst, fat12_br, 62);

  // Copy signature

  dst = start_addr + (( USBS_MSD_RAMDISK_BLOCKLEN * 2 ) - 2 );

  memcpy(dst, mbr_signature, 2);

  // Copy FAT0

  dst = start_addr + ( USBS_MSD_RAMDISK_BLOCKLEN * 2);

  memcpy(dst, fat, 3);

  // Copy FAT1

  dst = start_addr + ( USBS_MSD_RAMDISK_BLOCKLEN * 3);

  memcpy(dst, fat, 3);

  // Copy Root directory

  dst = start_addr + ( USBS_MSD_RAMDISK_BLOCKLEN * 4);

  memcpy(dst, root_dir, 32);

}

// ----------------------------------------------------------------------------

// Create a tiny "RAM disk" device

//

//

#define RAM_DISK_NAME "/dev/ramdisk0/"

typedef struct {

    volatile cyg_uint8 *base;

    cyg_uint16 size;

} ram_disk_info_t;

static cyg_bool ram_disk_init(struct cyg_devtab_entry *tab);

static Cyg_ErrNo ram_disk_bread(disk_channel *chan,

                              void         *buf,

                              cyg_uint32    len,

                              cyg_uint32    block_num);

static Cyg_ErrNo ram_disk_bwrite(disk_channel *chan,

                               const void   *buf,

                               cyg_uint32    len,

                               cyg_uint32    block_num);

static Cyg_ErrNo ram_disk_get_config(disk_channel *chan,

                               cyg_uint32    key,

                               const void   *xbuf,

                               cyg_uint32   *len);

static Cyg_ErrNo ram_disk_set_config(disk_channel *chan,

                               cyg_uint32    key,

                               const void   *xbuf,

                               cyg_uint32   *len);

static Cyg_ErrNo ram_disk_lookup(struct cyg_devtab_entry **tab,

                                struct cyg_devtab_entry  *sub_tab,

                                const char               *name);

DISK_FUNS(ram_disk_funs,

          ram_disk_bread,

          ram_disk_bwrite,

          ram_disk_get_config,

          ram_disk_set_config

);

DISK_CONTROLLER(ram_disk_controller, ram_disk_controller);

#define RAM_DISK_INSTANCE(_number_,_base_,_mbr_supp_,_name_)    \

static ram_disk_info_t ram_disk_info##_number_ = {              \

    base: (volatile cyg_uint8 *)_base_,                         \

};                                                              \

DISK_CHANNEL(ram_disk_channel##_number_,                        \

             ram_disk_funs,                                     \

             ram_disk_info##_number_,                           \

             ram_disk_controller,                               \

             _mbr_supp_,                                        \

             1                                                  \

);                                                              \

BLOCK_DEVTAB_ENTRY(ram_disk_io##_number_,                       \

             _name_,                                            \

             0,                                                 \

             &cyg_io_disk_devio,                                \

             ram_disk_init,                                     \

             ram_disk_lookup,                                   \

             &ram_disk_channel##_number_                        \

);

RAM_DISK_INSTANCE(0, 0, true, RAM_DISK_NAME);

// ----------------------------------------------------------------------------

static void

read_data(volatile cyg_uint8  *base,

          void                *buf,

          cyg_uint32           len)

{

    cyg_uint8 *dst = (cyg_uint8 *)buf;

    cyg_uint8 *src = (cyg_uint8 *)base;

    cyg_uint32 i = 0;

    for (i = 0; i < len; i += 1)

    {

        *dst = *src;

        dst = dst + 1; src = src + 1;

    }

}

static void

write_data(volatile cyg_uint8  *base,

           const void          *buf,

           cyg_uint16           len)

{

    cyg_uint8 *dst = (cyg_uint8 *)base;

    cyg_uint8 *src = (cyg_uint8 *)buf;

    cyg_uint32 i = 0;

    for (i = 0; i < len; i += 1)

    {

        *dst = *src;

         dst = dst + 1; src = src + 1;

    }

}

// ----------------------------------------------------------------------------

static cyg_bool

ram_disk_init(struct cyg_devtab_entry *tab)

{

    disk_channel           *chan = (disk_channel *) tab->priv;

    ram_disk_info_t         *info = (ram_disk_info_t *) chan->dev_priv;

    cyg_disk_identify_t     ident;

    if (chan->init)

        return true;

    info->base = (volatile cyg_uint8 *) &ram_disk[0];

    info->size = USBS_MSD_RAMDISK_BLOCKLEN * USBS_MSD_RAMDISK_NUM_BLOCK;

    DBG("RAM DISK ( %p ) init\n", info->base);

    init_fat12_disk( &ram_disk[0] );

    ident.cylinders_num   =  0;

    ident.heads_num       =  0;

    ident.lba_sectors_num = USBS_MSD_RAMDISK_NUM_BLOCK-2;

    ident.phys_block_size = USBS_MSD_RAMDISK_BLOCKLEN;

    ident.max_transfer    = USBS_MSD_RAMDISK_BLOCKLEN;

    if (!(chan->callbacks->disk_init)(tab))

        return false;

    if (ENOERR != (chan->callbacks->disk_connected)(tab, &ident))

        return false;

    return true;

}

static Cyg_ErrNo

ram_disk_lookup(struct cyg_devtab_entry **tab,

               struct cyg_devtab_entry  *sub_tab,

               const char *name)

{

    disk_channel *chan = (disk_channel *) (*tab)->priv;

    return (chan->callbacks->disk_lookup)(tab, sub_tab, name);

}

static Cyg_ErrNo

ram_disk_bread(disk_channel *chan,

             void         *buf,

             cyg_uint32    len,

             cyg_uint32    block_num)

{

    ram_disk_info_t *info = (ram_disk_info_t *)chan->dev_priv;

    volatile cyg_uint8 *src = info->base + USBS_MSD_RAMDISK_BLOCKLEN * block_num;

    cyg_uint32 len_byte = len * USBS_MSD_RAMDISK_BLOCKLEN;

    if ( len_byte == 0 )

      return EINVAL;

    read_data(src, buf, len_byte);

    return ENOERR;

}

static Cyg_ErrNo

ram_disk_bwrite(disk_channel *chan,

              const void   *buf,

              cyg_uint32    len,

              cyg_uint32    block_num)

{

    ram_disk_info_t *info = (ram_disk_info_t *)chan->dev_priv;

    volatile cyg_uint8 *dst = info->base + USBS_MSD_RAMDISK_BLOCKLEN * block_num;

    cyg_uint32 len_byte = len * USBS_MSD_RAMDISK_BLOCKLEN;

    if ( len_byte == 0 )

      return EINVAL;

    write_data(dst, buf, len_byte);

    return ENOERR;

}

static Cyg_ErrNo

ram_disk_get_config(disk_channel *chan,

                   cyg_uint32    key,

                   const void   *xbuf,

                   cyg_uint32   *len)

{

    return -EINVAL;

}

static Cyg_ErrNo

ram_disk_set_config(disk_channel *chan,

                   cyg_uint32    key,

                   const void   *xbuf,

                   cyg_uint32   *len)

{

    return -EINVAL;

}

// ----------------------------------------------------------------------------

// In case FAT file-system package is included, this application will try

// to play with the file-system before it is mounted as a mass storage device.

// The following code is a copy of the fatfs1.c from the fs/test directory

//

#if defined(CYGPKG_FS_FAT)

#define SHOW_RESULT( _fn, _res ) \

  DBG("<FAIL>: " #_fn "() returned %d %s\n", _res, _res<0?strerror(errno):"");

#define IOSIZE  100

//==========================================================================

void checkcwd( const char *cwd )

{

    static char cwdbuf[PATH_MAX];

    char *ret;

    ret = getcwd( cwdbuf, sizeof(cwdbuf));

    if( ret == NULL ) SHOW_RESULT( getcwd, (int)ret );

    if( strcmp( cwdbuf, cwd ) != 0 )

    {

        DBG( "cwdbuf %s cwd %s\n",cwdbuf, cwd );

        CYG_TEST_FAIL( "Current directory mismatch");

    }

}

//==========================================================================

static void listdir( char *name, int statp, int numexpected, int *numgot )

{

    int err;

    DIR *dirp;

    int num=0;

    DBG("<INFO>: reading directory %s\n",name);

    dirp = opendir( name );

    if( dirp == NULL ) SHOW_RESULT( opendir, -1 );

    for(;;)

    {

        struct dirent *entry = readdir( dirp );

        if( entry == NULL )

            break;

        num++;

        DBG("<INFO>: entry %14s",entry->d_name);

#ifdef CYGPKG_FS_FAT_RET_DIRENT_DTYPE

        DBG(" d_type %2x", entry->d_type);

#endif

        if( statp )

        {

            char fullname[PATH_MAX];

            struct stat sbuf;

            if( name[0] )

            {

                strcpy(fullname, name );

                if( !(name[0] == '/' && name[1] == 0 ) )

                    strcat(fullname, "/" );

            }

            else fullname[0] = 0;

            strcat(fullname, entry->d_name );

            err = stat( fullname, &sbuf );

            if( err < 0 )

            {

                if( errno == ENOSYS )

                    DBG(" <no status available>");

                else SHOW_RESULT( stat, err );

            }

            else

            {

                DBG(" [mode %08x ino %08x nlink %d size %ld]",

                            sbuf.st_mode,sbuf.st_ino,sbuf.st_nlink,(long)sbuf.st_size);

            }

#ifdef CYGPKG_FS_FAT_RET_DIRENT_DTYPE

            if ((entry->d_type & S_IFMT) != (sbuf.st_mode & S_IFMT))

              CYG_TEST_FAIL("File mode's don't match between dirent and stat");

#endif

        }

        DBG("\n");

    }

    err = closedir( dirp );

    if( err < 0 ) SHOW_RESULT( stat, err );

    if (numexpected >= 0 && num != numexpected)

        CYG_TEST_FAIL("Wrong number of dir entries\n");

    if ( numgot != NULL )

        *numgot = num;

}

//==========================================================================

static void createfile( char *name, size_t size )

{

    char buf[IOSIZE];

    int fd;

    ssize_t wrote;

    int i;

    int err;

    DBG("<INFO>: create file %s size %zd \n",name,size);

    err = access( name, F_OK );

    if( err < 0 && errno != EACCES ) SHOW_RESULT( access, err );

    for( i = 0; i < IOSIZE; i++ ) buf[i] = i%256;

    fd = open( name, O_WRONLY|O_CREAT );

    if( fd < 0 ) SHOW_RESULT( open, fd );

    while( size > 0 )

    {

        ssize_t len = size;

        if ( len > IOSIZE ) len = IOSIZE;

        wrote = write( fd, buf, len );

        if( wrote != len ) SHOW_RESULT( write, (int)wrote );

        size -= wrote;

    }

    err = close( fd );

    if( err < 0 ) SHOW_RESULT( close, err );

}

//==========================================================================

static void checkfile( char *name )

{

    char buf[IOSIZE];

    int fd;

    ssize_t done;

    int i;

    int err;

    off_t pos = 0;

    DBG("<INFO>: check file %s\n",name);

    err = access( name, F_OK );

    if( err != 0 ) SHOW_RESULT( access, err );

    fd = open( name, O_RDONLY );

    if( fd < 0 ) SHOW_RESULT( open, fd );

    for(;;)

    {

        done = read( fd, buf, IOSIZE );

        if( done < 0 ) SHOW_RESULT( read, (int)done );

        if( done == 0 ) break;

        for( i = 0; i < done; i++ )

            if( buf[i] != i%256 )

            {

                DBG("buf[%ld+%d](%02x) != %02x\n",pos,i,buf[i],i%256);

                CYG_TEST_FAIL("Data read not equal to data written\n");

            }

        pos += done;

    }

    err = close( fd );

    if( err < 0 ) SHOW_RESULT( close, err );

}

//==========================================================================

static void copyfile( char *name2, char *name1 )

{

    int err;

    char buf[IOSIZE];

    int fd1, fd2;

    ssize_t done, wrote;

    DBG("<INFO>: copy file %s -> %s\n",name2,name1);

    err = access( name1, F_OK );

    if( err < 0 && errno != EACCES ) SHOW_RESULT( access, err );

    err = access( name2, F_OK );

    if( err != 0 ) SHOW_RESULT( access, err );

    fd1 = open( name1, O_WRONLY|O_CREAT );

    if( fd1 < 0 ) SHOW_RESULT( open, fd1 );

    fd2 = open( name2, O_RDONLY );

    if( fd2 < 0 ) SHOW_RESULT( open, fd2 );

    for(;;)

    {

        done = read( fd2, buf, IOSIZE );

        if( done < 0 ) SHOW_RESULT( read, (int)done );

        if( done == 0 ) break;

        wrote = write( fd1, buf, done );

        if( wrote != done ) SHOW_RESULT( write, (int) wrote );

        if( wrote != done ) break;

    }

    err = close( fd1 );

    if( err < 0 ) SHOW_RESULT( close, err );

    err = close( fd2 );

    if( err < 0 ) SHOW_RESULT( close, err );

}

//==========================================================================

static void comparefiles( char *name2, char *name1 )

{

    int err;

    char buf1[IOSIZE];

    char buf2[IOSIZE];

    int fd1, fd2;

    ssize_t done1, done2;

    int i;

    DBG("<INFO>: compare files %s == %s\n",name2,name1);

    err = access( name1, F_OK );

    if( err != 0 ) SHOW_RESULT( access, err );

    err = access( name1, F_OK );

    if( err != 0 ) SHOW_RESULT( access, err );

    fd1 = open( name1, O_RDONLY );

    if( fd1 < 0 ) SHOW_RESULT( open, fd1 );

    fd2 = open( name2, O_RDONLY );

    if( fd2 < 0 ) SHOW_RESULT( open, fd2 );

    for(;;)

    {

        done1 = read( fd1, buf1, IOSIZE );

        if( done1 < 0 ) SHOW_RESULT( read, (int)done1 );

        done2 = read( fd2, buf2, IOSIZE );

        if( done2 < 0 ) SHOW_RESULT( read, (int)done2 );

        if( done1 != done2 )

            DBG("Files different sizes\n");

        if( done1 == 0 ) break;

        for( i = 0; i < done1; i++ )

            if( buf1[i] != buf2[i] )

            {