FS#7598 - Dircache support for multivolume targets (by Phil Light).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16632 a1c6a512-1295-4272-9138-f99709370657

6 files changed, 102 insertions, 49 deletions

diff --git a/docs/CREDITS b/docs/CREDITS
index c4d78edd85..6bbc868343 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -380,7 +380,7 @@ Keith Perri
 Mark Fawcus
 Ivan Pesic
 Marcel Barbulescu
-
+Phil Light
 
 The libmad team
 The wavpack team
diff --git a/firmware/common/dir_uncached.c b/firmware/common/dir_uncached.c
index e6b59c30ec..129ef35603 100644
--- a/firmware/common/dir_uncached.c
+++ b/firmware/common/dir_uncached.c
@@ -24,7 +24,6 @@
 #include "dir.h"
 #include "debug.h"
 #include "atoi.h"
-//#include "dircache.h"
 
 #define MAX_OPEN_DIRS 8
 
@@ -32,22 +31,9 @@ static DIR_UNCACHED 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%d>";
-#define VOL_ENUM_POS 4 /* position of %d, to avoid runtime calculation */
-#elif defined(HAVE_HOTSWAP)
-static const char* vol_names = "<microSD%d>";
-#define VOL_ENUM_POS 8 /* position of %d, to avoid runtime calculation */
-#else
-static const char* vol_names = "<HD%d>";
-#define VOL_ENUM_POS 3
-#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 strip_volume(const char* name, char* namecopy)
 {
     int volume = 0;
     const char *temp = name;
@@ -55,7 +41,7 @@ static int strip_volume(const char* name, char* namecopy)
     while (*temp == '/')          /* skip all leading slashes */
         ++temp;
         
-    if (*temp && !strncmp(temp, vol_names, VOL_ENUM_POS))
+    if (*temp && !strncmp(temp, VOL_NAMES, VOL_ENUM_POS))
     {
         temp += VOL_ENUM_POS;     /* behind special name */
         volume = atoi(temp);      /* number is following */
@@ -199,7 +185,7 @@ struct dirent_uncached* readdir_uncached(DIR_UNCACHED* dir)
                 memset(theent, 0, sizeof(*theent));
                 theent->attribute = FAT_ATTR_DIRECTORY | FAT_ATTR_VOLUME;
                 snprintf(theent->d_name, sizeof(theent->d_name), 
-                         vol_names, dir->volumecounter);
+                         VOL_NAMES, dir->volumecounter);
                 return theent;
             }
         }
diff --git a/firmware/common/dircache.c b/firmware/common/dircache.c
index ed392d6186..bf8ff45cff 100644
--- a/firmware/common/dircache.c
+++ b/firmware/common/dircache.c
@@ -37,6 +37,7 @@
 #include "usb.h"
 #include "file.h"
 #include "buffer.h"
+#include "dir.h"
 #if CONFIG_RTC
 #include "time.h"
 #include "timefuncs.h"
@@ -51,6 +52,9 @@ DIR_CACHED opendirs[MAX_OPEN_DIRS];
 
 static struct dircache_entry *fd_bindings[MAX_OPEN_FILES];
 static struct dircache_entry *dircache_root;
+#ifdef HAVE_MULTIVOLUME
+static struct dircache_entry *append_position;
+#endif
 
 static bool dircache_initialized = false;
 static bool dircache_initializing = false;
@@ -155,6 +159,9 @@ static bool check_event_queue(void)
     {
         case DIRCACHE_STOP:
         case SYS_USB_CONNECTED:
+#ifdef HAVE_HOTSWAP
+        case SYS_FS_CHANGED:
+#endif
             /* Put the event back into the queue. */
             queue_post(&dircache_queue, ev.id, ev.data);
             return true;
@@ -166,7 +173,7 @@ static bool check_event_queue(void)
 /**
  * Internal function to iterate a path.
  */
-static int dircache_scan(struct travel_data *td)
+static int dircache_scan(IF_MV2(int volume,) struct travel_data *td)
 {
 #ifdef SIMULATOR
     while ( ( td->entry = readdir_uncached(td->dir) ) )
@@ -273,22 +280,37 @@ static int dircache_scan(struct travel_data *td)
  * Recursively scan the hard disk and build the cache.
  */
 #ifdef SIMULATOR
-static int dircache_travel(DIR_UNCACHED *dir, struct dircache_entry *ce)
+static int dircache_travel(IF_MV2(int volume,) DIR_UNCACHED *dir, struct dircache_entry *ce)
 #else
-static int dircache_travel(struct fat_dir *dir, struct dircache_entry *ce)
+static int dircache_travel(IF_MV2(int volume,) struct fat_dir *dir, struct dircache_entry *ce)
 #endif
 {
     int depth = 0;
     int result;
 
     memset(ce, 0, sizeof(struct dircache_entry));
+
+#if defined(HAVE_MULTIVOLUME) && !defined(SIMULATOR)
+    if (volume > 0)
+    {
+        ce->d_name = ((char *)dircache_root+dircache_size);
+        snprintf(ce->d_name, VOL_ENUM_POS + 3, VOL_NAMES, volume);
+        ce->name_len = VOL_ENUM_POS + 3;
+        dircache_size += ce->name_len;
+        ce->attribute = FAT_ATTR_DIRECTORY | FAT_ATTR_VOLUME;
+        ce->size = 0;
+        append_position = dircache_gen_next(ce);
+        ce = dircache_gen_down(ce);
+    }
+#endif
+
     dir_recursion[0].dir = dir;
     dir_recursion[0].ce = ce;
     dir_recursion[0].first = ce;
     
     do {
         //logf("=> %s", dircache_cur_path);
-        result = dircache_scan(&dir_recursion[depth]);
+        result = dircache_scan(IF_MV2(volume,) &dir_recursion[depth]);
         switch (result) {
             case 0: /* Leaving the current directory. */
                 /* Add the standard . and .. entries. */
@@ -536,37 +558,57 @@ static int dircache_do_rebuild(void)
     start_tick = current_tick;
     dircache_initializing = true;
     appflags = 0;
+    entry_count = 0;
     
-#ifdef SIMULATOR
-    pdir = opendir_uncached("/");
-    if (pdir == NULL)
-    {
-        logf("Failed to open rootdir");
-        dircache_initializing = false;
-        return -3;
-    }
-#else
-    if ( fat_opendir(IF_MV2(volume,) &dir, 0, NULL) < 0 ) {
-        logf("Failed opening root dir");
-        dircache_initializing = false;
-        return -3;
-    }
-    pdir = &dir;
-#endif
-
     memset(dircache_cur_path, 0, sizeof(dircache_cur_path));
     dircache_size = sizeof(struct dircache_entry);
 
-    cpu_boost(true);
-    if (dircache_travel(pdir, dircache_root) < 0)
+#ifdef HAVE_MULTIVOLUME
+    append_position = dircache_root;
+
+    for (i = NUM_VOLUMES; i >= 0; i--)
     {
-        logf("dircache_travel failed");
-        cpu_boost(false);
-        dircache_size = 0;
-        dircache_initializing = false;
-        return -2;
+        if (fat_ismounted(i))
+        {
+#endif
+#ifdef SIMULATOR
+            pdir = opendir_uncached("/");
+            if (pdir == NULL)
+            {
+                logf("Failed to open rootdir");
+                dircache_initializing = false;
+                return -3;
+            }
+#else
+#ifdef HAVE_MULTIVOLUME
+            if ( fat_opendir(IF_MV2(i,) &dir, 0, NULL) < 0 ) {
+#else
+            if ( fat_opendir(IF_MV2(0,) &dir, 0, NULL) < 0 ) {
+#endif /* HAVE_MULTIVOLUME */
+                logf("Failed opening root dir");
+                dircache_initializing = false;
+                return -3;
+            }
+            pdir = &dir;
+#endif
+            cpu_boost(true);
+#ifdef HAVE_MULTIVOLUME
+            if (dircache_travel(IF_MV2(i,) pdir, append_position) < 0)
+#else
+            if (dircache_travel(IF_MV2(0,) pdir, dircache_root) < 0)
+#endif /* HAVE_MULTIVOLUME */
+            {
+                logf("dircache_travel failed");
+                cpu_boost(false);
+                dircache_size = 0;
+                dircache_initializing = false;
+                return -2;
+            }
+            cpu_boost(false);
+#ifdef HAVE_MULTIVOLUME
+        }
     }
-    cpu_boost(false);
+#endif
 
     logf("Done, %ld KiB used", dircache_size / 1024);
     
@@ -610,6 +652,12 @@ static void dircache_thread(void)
 
         switch (ev.id)
         {
+#ifdef HAVE_HOTSWAP
+            case SYS_FS_CHANGED:
+                if (!dircache_initialized)
+                    break;
+                dircache_initialized = false;
+#endif
             case DIRCACHE_BUILD:
                 thread_enabled = true;
                 dircache_do_rebuild();
diff --git a/firmware/export/config.h b/firmware/export/config.h
index c2033dfe23..e1c0cbc938 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -313,9 +313,7 @@
  * plenty of RAM. Both features can be enabled independently. */
 #if ((defined(MEMORYSIZE) && (MEMORYSIZE > 8)) || MEM > 8) && \
  !defined(BOOTLOADER)
-#if !defined(SANSA_E200) && !defined(SANSA_C200)
 #define HAVE_DIRCACHE
-#endif
 #ifdef HAVE_TAGCACHE
 #define HAVE_TC_RAMCACHE
 #endif
diff --git a/firmware/include/dir.h b/firmware/include/dir.h
index 4327b91682..6433f1d2ba 100644
--- a/firmware/include/dir.h
+++ b/firmware/include/dir.h
@@ -22,6 +22,23 @@
 
 #include "config.h"
 
+#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
+#define VOL_NAMES "<MMC%d>"
+#define VOL_ENUM_POS 4 /* position of %d, to avoid runtime calculation */
+#elif defined(HAVE_HOTSWAP)
+#define VOL_NAMES "<microSD%d>"
+#define VOL_ENUM_POS 8 /* position of %d, to avoid runtime calculation */
+#else
+#define VOL_NAMES "<HD%d>"
+#define VOL_ENUM_POS 3
+#endif
+
+#endif
+
 #ifdef HAVE_DIRCACHE
 # include "dircache.h"
 # define DIR DIR_CACHED
diff --git a/firmware/include/dir_uncached.h b/firmware/include/dir_uncached.h
index 575c3b67e4..dd00c2c66b 100644
--- a/firmware/include/dir_uncached.h
+++ b/firmware/include/dir_uncached.h
@@ -75,6 +75,10 @@ typedef struct {
 char *get_volume_name(int volume);
 #endif
 
+#ifdef HAVE_MULTIVOLUME
+    int strip_volume(const char*, char*);
+#endif
+
 #ifndef DIRFUNCTIONS_DEFINED
 
 extern DIR_UNCACHED* opendir_uncached(const char* name);