nwzstools/scsitool: try to guess series if possible

If the model is not known (ie model ID in the database) but another device from
the same series is known, then the database information probably applies and
one can use the "force" option -s to tell the tool to ignore the model ID.
Automatically print such advice when the series can be guessed.

Change-Id: I6bcc7aa29693df8c3d7d8e709ece7cea650be717

1 files changed, 19 insertions, 0 deletions

diff --git a/utils/nwztools/scsitools/scsitool.c b/utils/nwztools/scsitools/scsitool.c
index 69a3403b25..8526f8676b 100644
--- a/utils/nwztools/scsitools/scsitool.c
+++ b/utils/nwztools/scsitools/scsitool.c
@@ -373,6 +373,18 @@ int get_model_and_series(int *model_index, int *series_index, unsigned long *mod
     return 0;
 }
 
+/* model IDs follow a pattern: the high 16-bit seem to encode the series and low 16-bit the size
+ * (although this is not entirely reliable). Just try to find any device with the same high 16-bits
+ * and return the series it belongs to. */
+int guess_series_for_model(unsigned long model_id)
+{
+    for(int i = 0; i < NWZ_SERIES_COUNT; i++)
+        for(int j = 0; j < nwz_series[i].mid_count; j++)
+            if(nwz_series[i].mid[j] >> 16 == model_id >> 16)
+                return i;
+    return -1;
+}
+
 /* Read nvp node, retrun nonzero on error, update size to actual length. The
  * index is the raw node number sent to the device */
 int read_nvp_node(int node_index, void *buffer, size_t *size)
@@ -988,6 +1000,13 @@ void help_us(bool unsupported, unsigned long model_id)
         cprintf(RED, "Your device is not supported yet.\n");
     cprintf(RED, "Please contact developers and send them the information below.\n");
     cprintf(RED, "See https://www.rockbox.org/wiki/SonyNWDestTool#ReportDevice\n");
+    /* try to see if we know a device in the same series, so we can recommend a force action */
+    int series_idx = guess_series_for_model(model_id);
+    if(series_idx >= 0)
+    {
+        cprintf(OFF, "It seems your devices belongs to the %s series.\n", nwz_series[series_idx].name);
+        cprintf(OFF, "You can try to re-run this tool with the option -s %s\n", nwz_series[series_idx].codename);
+    }
     cprintf(BLUE, "-------------------[ Paste information below ]-------------------\n");
     cprintf_field("Model ID: ", "%#lx\n", model_id);
     get_dev_info(0, NULL);