Thread (12 messages) 12 messages, 3 authors, 2007-12-04

Re: Unable to Read PPC440EPx Board ID thru Board Control and Status Registers (BCSR)

From: Dell Query <hidden>
Date: 2007-11-28 08:26:02

Oh is it 0x1C0002000?

Where can I get the document? What I have is 0xC0002000 from ep440xc_um_amcc.pdf file that I get from the accompanying PPC440EPx resource CD.

Thanks!

dell

Josh Boyer [off-list ref] wrote: On Tue, 27 Nov 2007 02:47:45 -0800 (PST)
Dell Query  wrote:
Hi,

I am creating a simple program which will try to read the board ID of the PPC440EPx thru BCSR but when I load it, it gives me "Data Read PLB Error". 

I am not sure if I missed out something.

I would really appreciate it if somebody could help me on this.

I have posted the source code below, as well as the complete message.

Many thanks!

SOURCE CODE:
----------------------------------------------------------------------
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

MODULE_LICENSE("GPL");

#define BCSR_BASE   0xC0002000
This is wrong.  It's 0x1C0002000.
#define BCSR0       0
#define BCSR1       1
#define BCSR2       2

#define USER_LED    0x2
#define SIZE_TO_MAP 10

#define LED_ON      0

uint __iomem *bcsrbase = NULL;

static int __init initFunction(void) {
   uint tmp;
   printk("<1> Calling init function.\n");
   printk("<1> bcsrbase value %p...\n",bcsrbase);
   printk("<1> Remapping %x...\n",BCSR_BASE);
   /*map*/
   bcsrbase = ioremap(BCSR_BASE, SIZE_TO_MAP);
Since this seems to be arch/ppc, use ioremap64.

josh
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