From b6fce99046a3677f27373f8c701e6f200e290236 Mon Sep 17 00:00:00 2001
From: Solomon Peachy <pizza@shaftnet.org>
Date: Sun, 11 Apr 2021 09:10:55 -0400
Subject: ibasso:  Implement proper PIVOT_ROOT filesystem access

Including direct use of the external SD card mount

Known issue:  If SD card is inserted at startup, it must be
              ejected and reinserted to be registered.

Change-Id: I5f420160bda32135cbb088c1e8b04b6e3a73018e
---
 firmware/target/hosted/ibasso/system-ibasso.c | 55 +++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

(limited to 'firmware/target/hosted/ibasso/system-ibasso.c')

diff --git a/firmware/target/hosted/ibasso/system-ibasso.c b/firmware/target/hosted/ibasso/system-ibasso.c
index 45a6514aa2..401bb3c442 100644
--- a/firmware/target/hosted/ibasso/system-ibasso.c
+++ b/firmware/target/hosted/ibasso/system-ibasso.c
@@ -28,6 +28,7 @@
 
 #include "config.h"
 #include "debug.h"
+#include "mv.h"
 
 #include "button-ibasso.h"
 #include "debug-ibasso.h"
@@ -39,6 +40,8 @@
 uintptr_t* stackbegin;
 uintptr_t* stackend;
 
+/* forward-declare */
+bool os_file_exists(const char *ospath);
 
 void system_init(void)
 {
@@ -95,3 +98,55 @@ void system_exception_wait(void)
 
     while(1) {};
 }
+
+bool hostfs_removable(IF_MD_NONVOID(int drive))
+{
+#ifdef HAVE_MULTIDRIVE
+    if (drive > 0)
+        return true;
+    else
+#endif
+        return false; /* internal: always present */
+}
+
+#ifdef HAVE_MULTIDRIVE
+int volume_drive(int drive)
+{
+    return drive;
+}
+#endif /* HAVE_MULTIDRIVE */
+
+#ifdef CONFIG_STORAGE_MULTI
+int hostfs_driver_type(int drive)
+{
+    return drive > 0 ? STORAGE_SD_NUM : STORAGE_HOSTFS_NUM;
+}
+#endif /* CONFIG_STORAGE_MULTI */
+
+bool hostfs_present(IF_MD_NONVOID(int drive))
+{
+#ifdef HAVE_MULTIDRIVE
+    if (drive > 0)
+#if defined(MULTIDRIVE_DEV)
+        return os_file_exists(MULTIDRIVE_DEV);
+#else
+        return extsd_present;
+#endif
+    else
+#endif
+        return true; /* internal: always present */
+}
+
+#ifdef HAVE_HOTSWAP
+bool volume_removable(int volume)
+{
+    /* don't support more than one partition yet, so volume == drive */
+    return hostfs_removable(volume);
+}
+
+bool volume_present(int volume)
+{
+    /* don't support more than one partition yet, so volume == drive */
+    return hostfs_present(volume);
+}
+#endif
-- 
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