#10071 NORM Not Tri: external SD cards not working on XO-1.5

Zarro Boogs per Child bugtracker at laptop.org
Mon Jul 19 21:06:23 EDT 2010


#10071: external SD cards not working on XO-1.5
-------------------------------------------+--------------------------------
           Reporter:  sascha_silbe         |       Owner:  wmb at firmworks.com
               Type:  defect               |      Status:  assigned         
           Priority:  normal               |   Milestone:  Not Triaged      
          Component:  ofw - open firmware  |     Version:  1.5-C2           
         Resolution:                       |    Keywords:                   
        Next_action:  test in release      |    Verified:  0                
Deployment_affected:                       |   Blockedby:                   
           Blocking:                       |  
-------------------------------------------+--------------------------------
Changes (by wmb at firmworks.com):

  * status:  new => assigned
  * next_action:  never set => test in release


Comment:

 This could be related to the fix in svn 1890.  I discovered that, under
 certain conditions, the Via VX855 will report a Data Timeout error on a
 reset card (CMD0) command, even though CMD0 is not a data transfer
 command.

 svn 1890 seems to suppress this spurious CMD0 timeout by setting the data
 timeout control register before doing any card commands.  Previously it
 was set before any real data transfer command, but after several non-data
 commands.

 This change will appear in Q3A44.

-- 
Ticket URL: <http://dev.laptop.org/ticket/10071#comment:8>
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