[ts-7000] how to write dac driver for ts7200

["chaisc97" <>]

when i try to write a dac driver there are some error, the source code
is  

       static volatile unsigned char *Address=NULL;
        unsigned long bankcfg = 0x1000ffe0;

        error_io=check_mem_region(SMCBCR3,4);

        if(error_io<0)
        {
                return error_io;
        }
        request_mem_region(SMCBCR3,4,"smcbcr");
        
        Address=(unsigned char *)ioremap(SMCBCR3,4);
        printk("address=%x v_address=%x\n",SMCBCR3,Address);
        outw(bankcfg,Address);

the output is 

Using dac.o
address=8008000c v_address=c604000c
Unable to handle kernel paging request at virtual address 2604000c
pgd = c43f4000
[2604000c] *pgd=00000000, *pmd = 00000000
Internal error: Oops: 805
CPU: 0
pc : [<c603c178>]    lr : [<c603c164>]    Not tainted
sp : c16dbee0  ip : a0000013  fp : c16dbf10
r10: 00189f80  r9 : c16da000  r8 : ffffffea
r7 : 00000060  r6 : c5692000  r5 : c603c000  r4 : c603c4f0
r3 : 0000ffe0  r2 : 2604000c  r1 : 00000000  r0 : 00000024
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  Segment user
Control: C000317F  Table: 043F4000  DAC: 00000015
Process busybox (pid: 90, stack limit = 0xc16da378)
Stack: (0xc16dbee0 to 0xc16dc000)
bee0: 00000000 c604000c 00000004 8008000c 1000ffe0 00000000 c5692000
00000060 
bf00: 00000000 c446aa40 c16dbf14 c0234b14 c603c0c0 00000003 c5692000
c1690000 
bf20: c603e000 00000060 c0388d1c c603c060 00000578 00000000 00000000
00000000 
bf40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000 
bf60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000 
bf80: 00000000 00000030 00000578 00189f80 00000080 c02277ac c16da000
00000578 
bfa0: 7ffffe2c c0227580 00000578 00189f80 00900080 0017f3f8 00189f80
00000000 
bfc0: 00000030 00000578 00189f80 c603c000 0017f3f8 0008b0a0 00000578
7ffffe2c 
bfe0: 7fffda24 7fffda18 0006aecc 2ac3f130 60000010 00900080 00000a62
00000a64 
Backtrace: not available
Code: e59f3044 e5933000 e0822003 e15b32b0 (e1c230b0) 
Segmentation fault



 
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