Re: Problem with EP405's PCI

Thank you for your advise, but I have check that, too.  It is normal.
the ppc405_map_irq uses the value from ep405_devtable[], but it is empty if
I did not use CONFIG_EP405PC
the original
static struct {
 u8 cpld_xirq_select;
 int pci_idsel;
 int irq;
} ep405_devtable[] = {
#ifdef CONFIG_EP405PC
 {0x07, 0x0E, 25},  /* EP405PC: USB */
#endif
};

So I changed it, so it can take make the PCI work.
static struct {
 u8 cpld_xirq_select;
 int pci_idsel;
 int irq;
} ep405_devtable[] = {
 {0x01, 0x0A, 25},
};
which I copy from the Timesys Linux version of the ep405.c
Now it pass 25 as the irq number, but it still does not work.
When I do a cat /proc/interrupts
         CPU0
  0:        263  IBM UIC Level     serial
  9:          0    IBM UIC Level     OCP EMAC Wakeup
 10:          0   IBM UIC Level     MAL SERR
 11:        915  IBM UIC Level     MAL TX EOB
 12:       1891  IBM UIC Level     MAL RX EOB
 13:          0  IBM UIC Level     MAL TX DE
 14:          0  IBM UIC Level     MAL RX DE
 15:          0  IBM UIC Level     OCP EMAC MAC
 25:          0  IBM UIC Level     usb-ohci, usb-ohci
BAD:          0

When I do a cat /proc/pci
PCI devices found:
  Bus  0, device  10, function  0:
    USB Controller: NEC Corporation USB (rev 65).
       IRQ 25
      Master Capable.  Latency=128.  Min Gnt=1.Max Lat=42.
      Non-prefetchable 32 bit memory at 0xbffff000 [0xbfffffff].
  Bus  0, device  10, function  1:
    USB Controller: NEC Corporation USB (#2) (rev 65).
      IRQ 25
      Master Capable.  Latency=128.  Min Gnt=1.Max Lat=42.
      Non-prefetchable 32 bit memory at 0xbfffe000 [0xbfffefff].
  Bus  0, device  10, function  2:
    USB Controller: NEC Corporation USB 2.0 (rev 2).
      IRQ 25
      Master Capable.  Latency=128.  Min Gnt=16.Max Lat=34.
      Non-prefetchable 32 bit memory at 0xbfffdf00 [0xbfffdfff].

When I plug in a device into the USB card, it will complain about can't
accept the address which indicate that the interrupt is not set correctly on
the PCI side.  Am I right about this?

Thank you

Shih-Ying Chou

----- Original Message -----
From: "Steven Blakeslee" <redacted>
To: "'Shih-Ying Chou'" <redacted>
Sent: Friday, October 17, 2003 12:13 PM
Subject: RE: Problem with EP405's PCI

check to see if the function ppc405_map_irq in ep405.c ever returns a -1.
If that happens you may not have the correct value for the device ID in

the

ep405_devtable.

-----Original Message-----
From: Shih-Ying Chou [mailto:<redacted>]
Sent: Friday, October 17, 2003 11:57 AM
To: Jacky Lam
Cc: <redacted>
Subject: Re: Problem with EP405's PCI



Thank you very much for your input.  I have read the previous post but it

is

not very useful to me.
Because I am not using u-boot as my bootloader, since u-boot does not
support EP405 board.
I am using the Planet Core from Embedded Planet which does not do any
initialization on the PCI.

Does anyone have any other idea?

Thanks in advance

Shih-Ying Chou

----- Original Message -----
From: "Jacky Lam" <redacted>
To: <redacted>
Sent: Friday, October 17, 2003 1:56 AM
Subject: Re: Problem with EP405's PCI

quoted

    Please see my previous post and the reply from xzuo@vinesystech.com

.

quoted

Hope it can help.

Jacky
----- Original Message -----
From: "Shih-Ying Chou" <redacted>
To: <redacted>
Sent: Friday, October 17, 2003 12:58 PM
Subject: Problem with EP405's PCI

quoted

Hi All,
    Have anyone successfully made the EP405's PCI (through PC/104

plus)

quoted

quoted

work?  If anyone does, please help me, I have struggle with it for

over

a

quoted

quoted

month now.
    Right now I am using the linuxppc_2_4_devel kernel, and I can get

the

quoted

quoted

EP405 to boot successfully.  But I can get the PCI interface to work

right.

quoted

When booting up, the kernel can recognize the card weither USB or

Sound

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quoted

card, but it can seem to assign the right irq to the card.  Because

USB

quoted

card

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always complain about no IRQ assign and ask to check BIOS.
    I have look at the ep405.c and ppc405_pci.c and ppc4xx_pic.c

files,

quoted

but

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I cannot find out what is wrong.  I know that I need to modify the
ppc405_devtable [] in the ep405.c file. I also check the registers

such

as

quoted

quoted

DCRN_UIC_PR, DCRN_UIC_TR, and DCRN_UIC_SR and all the value seems to

be

quoted

quoted

correct, except DCRN_UIC_PR.  In the ep405.c DCRN_UIC_PR is set to be
0xffffff80 which makes the PCI interrupt to be high, so as the User

manual

quoted

quoted

stated.  But isn't PCI's interrupt should be active low?

Any pointer will be helpful, thank you in advance!

Shih-Ying Chou

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