prepared to mount multiple partitions into one logical file system (most useful for Ondio, internal memory + external MMC)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5514 a1c6a512-1295-4272-9138-f99709370657

apps/main.c

@@ -101,6 +101,9 @@ int main(void)
 #ifdef CONFIG_TUNER
 #include "radio.h"
 #endif
+#ifdef HAVE_MMC
+#include "ata_mmc.h"
+#endif
 
 /*#define AUTOROCK*/ /* define this to check for "autostart.rock" on boot */
 
@@ -236,7 +239,8 @@ void init(void)
 
     usb_start_monitoring();
 
-    pinfo = disk_init();
+    /* FixMe: the same kind of mounting happens in usb.c, share the code. */
+    pinfo = disk_init(IF_MV(0));
     if (!pinfo)
     {
         lcd_clear_display();
@@ -252,14 +256,15 @@ void init(void)
         system_reboot();
     }
 
+    fat_init();
     for ( i=0; i<4; i++ ) {
-        if (!fat_mount(pinfo[i].start))
+        if (!fat_mount(IF_MV2(0,) IF_MV2(0,) pinfo[i].start))
-            break;
+            break; /* only one partition gets mounted as of now */
     }
 
     if ( i==4 ) {
         DEBUGF("No partition found, trying to mount sector 0.\n");
-        rc = fat_mount(0);
+        rc = fat_mount(IF_MV2(0,) IF_MV2(0,) 0);
         if(rc) {
             lcd_clear_display();
             lcd_puts(0,0,"No FAT32");
@@ -272,7 +277,26 @@ void init(void)
             /* The USB thread will panic if the drive still can't be mounted */
         }
     }
+#ifdef HAVE_MULTIVOLUME
+    /* mount partition on the optional volume */
+#ifdef HAVE_MMC
+    if (mmc_detect()) /* for Ondio, only if card detected */
+#endif
+    {
+        pinfo = disk_init(1);
+        if (pinfo)
+        {
+            for ( i=0; i<4; i++ ) {
+                if (!fat_mount(1, 1, pinfo[i].start))
+                    break; /* only one partition gets mounted as of now */
+            }
 
+            if ( i==4 ) {
+                rc = fat_mount(1, 1, 0);
+            }
+        }
+    }
+#endif /* #ifdef HAVE_MULTIVOLUME */
     settings_calc_config_sector();
     settings_load(SETTINGS_ALL);
     settings_apply();

apps/main_menu.c

@@ -146,7 +146,7 @@ bool show_info(void)
     int state = 1;
     unsigned int size, free;
 
-    fat_size( &size, &free );
+    fat_size( IF_MV2(0,) &size, &free );
     size /= 1024;
     free /= 1024;
 

apps/settings.c

@@ -513,8 +513,7 @@ static int load_config_buffer(int which)
     if (which & SETTINGS_HD)
     {
         if (config_sector != 0) {
-            ata_read_sectors( config_sector, 1,  config_block);
+            ata_read_sectors(IF_MV2(0,) config_sector, 1,  config_block);
-
             /* calculate the checksum, check it and the header */
             chksum = calculate_config_checksum(config_block);
         
@@ -623,7 +622,7 @@ void settings_calc_config_sector(void)
     int i, partition_start;
     int sector = 0;
 
-    if (fat_startsector() != 0)    /* There is a partition table */
+    if (fat_startsector(IF_MV(0)) != 0)    /* There is a partition table */
     {
         sector = 61;
         for (i = 0; i < 4; i++)

apps/tree.c

@@ -302,6 +302,13 @@ static int compare(const void* p1, const void* p2)
     if (e1->attr & ATTR_DIRECTORY && e2->attr & ATTR_DIRECTORY)
     {   /* two directories */
         criteria = global_settings.sort_dir;
+        if (e1->attr & ATTR_VOLUME || e2->attr & ATTR_VOLUME)
+        {   /* a volume identifier is involved */
+            if (e1->attr & ATTR_VOLUME && e2->attr & ATTR_VOLUME)
+                criteria = 0; /* two volumes: sort alphabetically */
+            else /* only one is a volume: volume first */
+                return (e2->attr & ATTR_VOLUME) - (e1->attr & ATTR_VOLUME);
+        }
     }
     else if (!(e1->attr & ATTR_DIRECTORY) && !(e2->attr & ATTR_DIRECTORY))
     {   /* two files */

apps/tree.h

@@ -108,7 +108,7 @@ struct filetype {
 };
  
 
-/* using attribute bits not used by FAT (FAT uses lower 6) */
+/* using attribute bits not used by FAT (FAT uses lower 7) */
 
 #define TREE_ATTR_THUMBNAIL 0x0080 /* corresponding .talk file exists */
 

firmware/common/dir.c

@@ -23,11 +23,48 @@
 #include "fat.h"
 #include "dir.h"
 #include "debug.h"
+#include "atoi.h"
 
 #define MAX_OPEN_DIRS 8
 
 static DIR opendirs[MAX_OPEN_DIRS];
 
+#ifdef HAVE_MULTIVOLUME
+
+/* how to name volumes, first char must be outside of legal file names,
+   a number gets appended to enumerate, if applicable */
+#ifdef HAVE_MMC
+static const char* vol_names = ":MMC";
+#else
+static const char* vol_names = ":HD";
+#endif
+
+/* returns on which volume this is, and copies the reduced name
+   (sortof a preprocessor for volume-decorated pathnames) */
+static int strip_volume(const char* name, char* namecopy)
+{
+    int volume = 0;
+
+    if (name[1] == vol_names[0] ) /* a colon identifies our volumes */
+    {
+        const char* temp;
+        temp = name + 1 + strlen(vol_names); /* behind special name */
+        volume = atoi(temp); /* number is following */
+        temp = strchr(temp, '/'); /* search for slash behind */
+        if (temp != NULL)
+            name = temp; /* use the part behind the volume */
+        else
+            name = "/"; /* else this must be the root dir */
+    }
+
+    strncpy(namecopy, name, MAX_PATH);
+    namecopy[MAX_PATH-1] = '\0';
+
+    return volume;
+}
+#endif /* #ifdef HAVE_MULTIVOLUME */
+
+
 DIR* opendir(const char* name)
 {
     char namecopy[MAX_PATH];
@@ -35,6 +72,9 @@ DIR* opendir(const char* name)
     char* end;
     struct fat_direntry entry;
     int dd;
+#ifdef HAVE_MULTIVOLUME
+    int volume;
+#endif
 
     /* find a free dir descriptor */
     for ( dd=0; dd<MAX_OPEN_DIRS; dd++ )
@@ -55,15 +95,21 @@ DIR* opendir(const char* name)
         return NULL;
     }
 
-    if ( fat_opendir(&(opendirs[dd].fatdir), 0, NULL) < 0 ) {
+#ifdef HAVE_MULTIVOLUME
+    /* try to extract a heading volume name, if present */
+    volume = strip_volume(name, namecopy);
+    opendirs[dd].volumecounter = 0;
+#else
+    strncpy(namecopy,name,sizeof(namecopy)); /* just copy */
+    namecopy[sizeof(namecopy)-1] = '\0';
+#endif
+
+    if ( fat_opendir(IF_MV2(volume,) &(opendirs[dd].fatdir), 0, NULL) < 0 ) {
         DEBUGF("Failed opening root dir\n");
         opendirs[dd].busy = false;
         return NULL;
     }
 
-    strncpy(namecopy,name,sizeof(namecopy));
-    namecopy[sizeof(namecopy)-1] = 0;
-
     for ( part = strtok_r(namecopy, "/", &end); part;
           part = strtok_r(NULL, "/", &end)) {
         /* scan dir for name */
@@ -76,7 +122,8 @@ DIR* opendir(const char* name)
             if ( (entry.attr & FAT_ATTR_DIRECTORY) &&
                  (!strcasecmp(part, entry.name)) ) {
                 opendirs[dd].parent_dir = opendirs[dd].fatdir;
-                if ( fat_opendir(&(opendirs[dd].fatdir),
+                if ( fat_opendir(IF_MV2(volume,)
+                                 &(opendirs[dd].fatdir),
                                  entry.firstcluster,
                                  &(opendirs[dd].parent_dir)) < 0 ) {
                     DEBUGF("Failed opening dir '%s' (%d)\n",
@@ -84,6 +131,9 @@ DIR* opendir(const char* name)
                     opendirs[dd].busy = false;
                     return NULL;
                 }
+#ifdef HAVE_MULTIVOLUME
+                opendirs[dd].volumecounter = -1; /* n.a. to subdirs */
+#endif
                 break;
             }
         }
@@ -102,7 +152,28 @@ struct dirent* readdir(DIR* dir)
 {
     struct fat_direntry entry;
     struct dirent* theent = &(dir->theent);
-
+#ifdef HAVE_MULTIVOLUME
+    /* Volumes (secondary file systems) get inserted into the root directory
+        of the first volume, since we have no separate top level. */
+    if (dir->volumecounter >= 0 /* on a root dir */
+     && dir->volumecounter < NUM_VOLUMES /* in range */
+     && dir->fatdir.file.volume == 0) /* at volume 0 */
+    {   /* fake special directories, which don't really exist, but
+           will get redirected upon opendir() */
+        while (++dir->volumecounter < NUM_VOLUMES)
+        {
+            if (fat_ismounted(dir->volumecounter))
+            {
+                memset(theent, 0, sizeof(*theent));
+                theent->attribute = FAT_ATTR_DIRECTORY | FAT_ATTR_VOLUME;
+                snprintf(theent->d_name, sizeof(theent->d_name), 
+                         "%s%d", vol_names, dir->volumecounter);
+                return theent;
+            }
+        }
+    }
+#endif
+    /* normal directory entry fetching follows here */
     if (fat_getnext(&(dir->fatdir),&entry) < 0)
         return NULL;
 

firmware/common/disk.c

@@ -41,12 +41,22 @@
 
 static struct partinfo part[8];
 
-struct partinfo* disk_init(void)
+struct partinfo* disk_init(IF_MV_NONVOID(int drive))
 {
     int i;
     unsigned char sector[512];
+#ifdef HAVE_MULTIVOLUME
+    /* For each drive, start at a different position, in order not to destroy 
+       the first entry of drive 0. 
+       That one is needed to calculate config sector position. */
+    struct partinfo* pinfo = &part[drive*4];
+    if ((size_t)drive >= sizeof(part)/sizeof(*part)/4)
+        return NULL; /* out of space in table */
+#else
+    struct partinfo* pinfo = part;
+#endif
 
-    ata_read_sectors(0,1,&sector);
+    ata_read_sectors(IF_MV2(drive,) 0,1,&sector);
 
     /* check that the boot sector is initialized */
     if ( (sector[510] != 0x55) ||
@@ -58,20 +68,20 @@ struct partinfo* disk_init(void)
     /* parse partitions */
     for ( i=0; i<4; i++ ) {
         unsigned char* ptr = sector + 0x1be + 16*i;
-        part[i].type  = ptr[4];
+        pinfo[i].type  = ptr[4];
-        part[i].start = BYTES2INT32(ptr, 8);
+        pinfo[i].start = BYTES2INT32(ptr, 8);
-        part[i].size  = BYTES2INT32(ptr, 12);
+        pinfo[i].size  = BYTES2INT32(ptr, 12);
 
         DEBUGF("Part%d: Type %02x, start: %08x size: %08x\n",
-               i,part[i].type,part[i].start,part[i].size);
+               i,pinfo[i].type,pinfo[i].start,pinfo[i].size);
 
         /* extended? */
-        if ( part[i].type == 5 ) {
+        if ( pinfo[i].type == 5 ) {
             /* not handled yet */
         }
     }
 
-    return part;
+    return pinfo;
 }
 
 struct partinfo* disk_partinfo(int partition)

firmware/common/file.c

@@ -132,7 +132,8 @@ int open(const char* pathname, int flags)
     /* scan dir for name */
     while ((entry = readdir(dir))) {
         if ( !strcasecmp(name, entry->d_name) ) {
-            fat_open(entry->startcluster,
+            fat_open(IF_MV2(dir->fatdir.file.volume,)
+                     entry->startcluster,
                      &(file->fatfile),
                      &(dir->fatdir));
             file->size = file->trunc ? 0 : entry->size;

firmware/drivers/ata.c

@@ -310,7 +310,8 @@ static void copy_read_sectors(unsigned char* buf, int wordcount)
 #endif
 }
 
-int ata_read_sectors(unsigned long start,
+int ata_read_sectors(IF_MV((int drive,))
+                     unsigned long start,
                      int incount,
                      void* inbuf)
 {
@@ -576,7 +577,8 @@ static void copy_write_sectors(const unsigned char* buf, int wordcount)
 #endif
 }
 
-int ata_write_sectors(unsigned long start,
+int ata_write_sectors(IF_MV((int drive,))
+                      unsigned long start,
                       int count,
                       const void* buf)
 {
@@ -669,6 +671,8 @@ int ata_write_sectors(unsigned long start,
     return ret;
 }
 
+/* schedule a single sector write, executed with the the next spinup 
+   (volume 0 only, used for config sector) */
 extern void ata_delayed_write(unsigned long sector, const void* buf)
 {
     memcpy(delayed_sector, buf, SECTOR_SIZE);
@@ -676,12 +680,13 @@ extern void ata_delayed_write(unsigned long sector, const void* buf)
     delayed_write = true;
 }
 
+/* write the delayed sector to volume 0 */
 extern void ata_flush(void)
 {
     if ( delayed_write ) {
         DEBUGF("ata_flush()\n");
         delayed_write = false;
-        ata_write_sectors(delayed_sector_num, 1, delayed_sector);
+        ata_write_sectors(IF_MV2(0,) delayed_sector_num, 1, delayed_sector);
     }
 }
 

firmware/drivers/ata_mmc.c

@@ -608,7 +608,11 @@ static int send_single_sector(const unsigned char *buf, int timeout)
     return ret;
 }
 
-int ata_read_sectors(unsigned long start,
+int ata_read_sectors(
+#ifdef HAVE_MULTIVOLUME
+    int drive,
+#endif
+    unsigned long start,
     int incount,
     void* inbuf)
 {
@@ -617,8 +621,11 @@ int ata_read_sectors(unsigned long start,
     unsigned long addr;
     unsigned char response;
     void *inbuf_prev = NULL;
-    tCardInfo *card = &card_info[current_card];
+    tCardInfo *card;
-
+#ifdef HAVE_MULTIVOLUME
+    current_card = drive;
+#endif
+    card = &card_info[current_card];
     addr = start * SECTOR_SIZE;
 
     mutex_lock(&mmc_mutex);
@@ -663,7 +670,11 @@ int ata_read_sectors(unsigned long start,
     return ret;
 }
 
-int ata_write_sectors(unsigned long start,
+int ata_write_sectors(
+#ifdef HAVE_MULTIVOLUME
+                      int drive,
+#endif
+                      unsigned long start,
                       int count,
                       const void* buf)
 {
@@ -671,7 +682,11 @@ int ata_write_sectors(unsigned long start,
     int i;
     unsigned long addr;
     unsigned char response;
-    tCardInfo *card = &card_info[current_card];
+    tCardInfo *card;
+#ifdef HAVE_MULTIVOLUME
+    current_card = drive;
+#endif
+    card = &card_info[current_card];
 
     if (start == 0)
         panicf("Writing on sector 0\n");
@@ -733,12 +748,13 @@ extern void ata_delayed_write(unsigned long sector, const void* buf)
     delayed_write = true;
 }
 
+/* write the delayed sector to volume 0 */
 extern void ata_flush(void)
 {
     if ( delayed_write ) {
         DEBUGF("ata_flush()\n");
         delayed_write = false;
-        ata_write_sectors(delayed_sector_num, 1, delayed_sector);
+        ata_write_sectors(IF_MV2(0,) delayed_sector_num, 1, delayed_sector);
     }
 }
 

firmware/export/ata.h

@@ -20,6 +20,21 @@
 #define __ATA_H__
 
 #include <stdbool.h>
+#include "config.h" /* for HAVE_MULTIVOLUME or not */
+
+/* FixMe: These macros are a bit nasty and perhaps misplaced here.
+   We'll get rid of them once decided on how to proceed with multivolume. */
+#ifdef HAVE_MULTIVOLUME
+#define IF_MV(x) x /* optional volume/drive parameter */
+#define IF_MV2(x,y) x,y /* same, for a list of arguments */
+#define IF_MV_NONVOID(x) x /* for prototype with sole volume parameter */
+#define NUM_VOLUMES 2
+#else /* empty definitions if no multi-volume */
+#define IF_MV(x)
+#define IF_MV2(x,y)
+#define IF_MV_NONVOID(x) void
+#define NUM_VOLUMES 1
+#endif
 
 /*
   ata_spindown() time values:
@@ -41,8 +56,8 @@ extern bool ata_disk_is_active(void);
 extern int ata_hard_reset(void);
 extern int ata_soft_reset(void);
 extern int ata_init(void);
-extern int ata_read_sectors(unsigned long start, int count, void* buf);
+extern int ata_read_sectors(IF_MV2(int drive,) unsigned long start, int count, void* buf);
-extern int ata_write_sectors(unsigned long start, int count, const void* buf);
+extern int ata_write_sectors(IF_MV2(int drive,) unsigned long start, int count, const void* buf);
 extern void ata_delayed_write(unsigned long sector, const void* buf);
 extern void ata_flush(void);
 extern void ata_spin(void);

firmware/export/disk.h

@@ -19,6 +19,8 @@
 #ifndef _DISK_H_
 #define _DISK_H_
 
+#include "ata.h" /* for volume definitions */
+
 struct partinfo {
     unsigned long start; /* first sector (LBA) */
     unsigned long size;  /* number of sectors */
@@ -30,7 +32,7 @@ struct partinfo {
 #define PARTITION_TYPE_FAT16     0x06
 
 /* returns a pointer to an array of 8 partinfo structs */
-struct partinfo* disk_init(void);
+struct partinfo* disk_init(IF_MV_NONVOID(int volume));
 struct partinfo* disk_partinfo(int partition);
 
 #endif

firmware/export/fat.h

@@ -21,6 +21,7 @@
 #define FAT_H
 
 #include <stdbool.h>
+#include "ata.h" /* for volume definitions */
 
 #define SECTOR_SIZE 512
 
@@ -45,6 +46,7 @@ struct fat_direntry
 #define FAT_ATTR_VOLUME_ID   0x08
 #define FAT_ATTR_DIRECTORY   0x10
 #define FAT_ATTR_ARCHIVE     0x20
+#define FAT_ATTR_VOLUME      0x40 /* this is a volume, not a real directory */
 
 struct fat_file
 {
@@ -57,6 +59,9 @@ struct fat_file
     unsigned int direntries; /* number of dir entries used by this file */
     unsigned int dircluster; /* first cluster of dir */
     bool eof;
+#ifdef HAVE_MULTIVOLUME
+    int volume;           /* file resides on which volume */
+#endif
 };
 
 struct fat_dir
@@ -69,14 +74,16 @@ struct fat_dir
 };
 
 
-extern int fat_mount(int startsector);
+extern void fat_init(void);
-extern void fat_size(unsigned int* size, unsigned int* free);
+extern int fat_mount(IF_MV2(int volume,) IF_MV2(int drive,) int startsector);
-extern void fat_recalc_free(void);
+extern void fat_size(IF_MV2(int volume,) unsigned int* size, unsigned int* free); // public for info
+extern void fat_recalc_free(IF_MV_NONVOID(int volume)); // public for debug info screen
 extern int fat_create_dir(const char* name,
                           struct fat_dir* newdir,
                           struct fat_dir* dir);
-extern int fat_startsector(void);
+extern int fat_startsector(IF_MV_NONVOID(int volume)); // public for config sector
-extern int fat_open(unsigned int cluster,
+extern int fat_open(IF_MV2(int volume,)
+                    unsigned int cluster,
                     struct fat_file* ent,
                     const struct fat_dir* dir);
 extern int fat_create_file(const char* name,
@@ -93,9 +100,11 @@ extern int fat_rename(struct fat_file* file,
                       const unsigned char* newname,
                       int size, int attr);
 
-extern int fat_opendir(struct fat_dir *ent, unsigned int currdir,
+extern int fat_opendir(IF_MV2(int volume,)
+                       struct fat_dir *ent, unsigned int currdir,
                        const struct fat_dir *parent_dir);
 extern int fat_getnext(struct fat_dir *ent, struct fat_direntry *entry);
-extern int fat_get_cluster_size(void);
+extern int fat_get_cluster_size(IF_MV_NONVOID(int volume));
+extern bool fat_ismounted(int volume);
 
 #endif

firmware/include/dir.h

@@ -30,6 +30,7 @@
 #define ATTR_VOLUME_ID   0x08
 #define ATTR_DIRECTORY   0x10
 #define ATTR_ARCHIVE     0x20
+#define ATTR_VOLUME      0x40 /* this is a volume, not a real directory */
 
 struct dirent {
     unsigned char d_name[MAX_PATH];
@@ -52,6 +53,9 @@ typedef struct {
     struct fat_dir fatdir;
     struct fat_dir parent_dir;
     struct dirent theent;
+#ifdef HAVE_MULTIVOLUME
+    int volumecounter; /* running counter for faked volume entries */
+#endif
 } DIR;
 
 #else /* SIMULATOR */

firmware/test/fat/main.c

@@ -677,7 +677,7 @@ int main(int argc, char *argv[])
 #endif
         ) {
             DEBUGF("*** Mounting at block %ld\n",pinfo[i].start);
-            rc = fat_mount(pinfo[i].start);
+            rc = fat_mount(IF_MV2(0,) IF_MV2(0,) pinfo[i].start);
             if(rc) {
                 DEBUGF("mount: %d",rc);
                 return -1;
@@ -686,7 +686,7 @@ int main(int argc, char *argv[])
         }
     }
     if ( i==4 ) {
-        if(fat_mount(0)) {
+        if(fat_mount(IF_MV2(0,) IF_MV2(0,) 0)) {
             DEBUGF("No FAT32 partition!");
             return -1;
         }

firmware/usb.c

@@ -157,17 +157,38 @@ static void usb_slave_mode(bool on)
             panicf("ata: %d",rc);
         }
     
-        pinfo = disk_init();
+        pinfo = disk_init(IF_MV(0));
         if (!pinfo)
             panicf("disk: NULL");
     
+        fat_init();
         for ( i=0; i<4; i++ ) {
-            rc = fat_mount(pinfo[i].start);
+            rc = fat_mount(IF_MV2(0,) IF_MV2(0,) pinfo[i].start);
             if (!rc)
-                break;
+                break; /* only one partition gets mounted as of now */
         }
         if (i==4)
             panicf("mount: %d",rc);
+#ifdef HAVE_MULTIVOLUME
+        /* mount partition on the optional volume */
+#ifdef HAVE_MMC
+        if (mmc_detect()) /* for Ondio, only if card detected */
+#endif
+        {
+            pinfo = disk_init(1);
+            if (pinfo)
+            {
+                for ( i=0; i<4; i++ ) {
+                    if (!fat_mount(1, 1, pinfo[i].start))
+                        break; /* only one partition gets mounted as of now */
+                }
+
+                if ( i==4 ) {
+                    rc = fat_mount(1, 1, 0);
+                }
+            }
+        }
+#endif /* #ifdef HAVE_MULTIVOLUME */
     }
 }