Hi,
I try to port a DOS program under rtl but I've a problem to map a pci
memory :
On my pci acquisition board I've got 0x20000 bytes of DPRAM, 0x40000
bytes for a table, 0x20 bytes for Timer and 2 for a status register.
under /proc/pci I can see the physical adress of this four regions :
Bus 0, device 9, function 0:
Keyboard controller: AMCC Unknown device (rev 0).
Vendor id=10e8. Device id=5920.
Medium devsel. Fast back-to-back capable. IRQ 10.
I/O at 0xf000 [0xf001].
Non-prefetchable 32 bit memory at 0xffac0000 [0xffac0000].
Non-prefetchable 32 bit memory at 0xffabffc0 [0xffabffc0].
Non-prefetchable 32 bit memory at 0xffabffb0 [0xffabffb0].
Non-prefetchable 32 bit memory at 0xffa00000 [0xffa00000].
when I init my module I request this regions like this :
int init_piraq(void)
{
u32 val;
struct pci_dev * dev = NULL;
printk("\nStarting Real Time Piraq II module\n");
dev = pci_find_device(PIRAQ_VENDOR,PIRAQ_ID, dev);
if (dev == NULL) {
printk("No Piraq board installed\n");
return (-1);
}
pci_read_config_dword (dev,0x20,&val);
LOOKUP = ioremap(val,(u32)0x40000);
#ifdef DEBUG
printk("@LOOKUP = 0x%x %x\n",LOOKUP,val);
#endif
if(check_region(*LOOKUP,0x40000)) {
printk("Piraq Lookup Table is locked by someone else\n");
}
request_region(*LOOKUP,0x40000,"PII_lookup");
pci_read_config_dword (dev,0x14,&val);
PII_DPRAM = ioremap(val,(u32)0x20000);
#ifdef DEBUG
printk("@DPRAM = 0x%x %x\n",PII_DPRAM,val);
#endif
if(check_region(*PII_DPRAM,0x20000)) {
printk("Piraq Dpram is locked by someone else\n");
}
request_region(*PII_DPRAM,0x20000,"PII_dpram");
pci_read_config_dword (dev,0x18,&val);
TIMER = ioremap(val,(u32)0x40);
#ifdef DEBUG
printk("@TIMER = 0x%x %x\n",TIMER,val);
#endif
if(check_region(*TIMER,0x40)) {
printk("Piraq Timer is locked by someone else\n");
}
request_region(*TIMER,0x40,"PII_Timer");
pci_read_config_dword (dev,0x1C,&val);
STATUS = ioremap(val,(u32)0x02);
#ifdef DEBUG
printk("@STATUS = 0x%x %x\n",STATUS,val);
#endif
if(check_region(*STATUS,0x02)) {
printk("Piraq Status is locked by someone else\n");
}
request_region(*STATUS,0x02,"PII_Status");
}
All the printk provide the following result :
Aug 15 20:36:58 kernel: Starting Real Time Piraq II module
Aug 15 20:36:58 kernel: created RT-thread
Aug 15 20:36:58 kernel: @LOOKUP = 0xc2a5a000 ffa00000
Aug 15 20:36:58 kernel: Piraq Lookup Table is locked by someone else
Aug 15 20:36:58 kernel: @DPRAM = 0xc2a9b000 ffac0000
Aug 15 20:36:58 kernel: @TIMER = 0xc2abcfc0 ffabffc0
Aug 15 20:36:58 kernel: @STATUS = 0xc2abefb0 ffabffb0
Aug 15 20:36:58 kernel: Piraq II board found at 0xf001 interrupt 0xa
Under /proc/ioports I can see all my request except the one for the
LOOKUP.
If I decrease the size of the LOOKUP to some thing very small I can
make the request.
Do you have any solution ????
I can allocate all the LOOKUP size with djgpp.
Thank in advance
Fred Cazenave
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