serial port driver 8250_pci - pci_device_id structure

serial port driver 8250_pci - pci_device_id structure

[V. ANANDA KRISHNAN]

Hi All,

  In ppc architecture, I am trying to find out the codes that populate
the pci_devic_id structure ( drivers/serial/8250_pci.c file) in the
following init_one function:

static int __devinit
pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)


  I have the (pci card) data hard-coded in the following tables of
8250_pci.c file:
          static struct pci_device_id serial_pci_tbl[]
          static struct pci_board pci_boards[] __devinitdata={...}


Since I could not find the data in the pci_device_id for pci card, I
went thru the drivers/pci/search.c and drivers/pci/pci-driver.c files. I
am not successful in locating those codes that populate the
pci_device_id structure for a given pci card.

Could some one let me know where I go wrong or where I have to look for
the codes?

Thanks,
V. Ananda Krishnan

Re: serial port driver 8250_pci - pci_device_id structure

[Greg KH]

On Tue, Jun 14, 2005 at 04:05:40PM -0500, V. ANANDA KRISHNAN wrote:
> Hi All,
> 
>   In ppc architecture, I am trying to find out the codes that populate
> the pci_devic_id structure ( drivers/serial/8250_pci.c file) in the
> following init_one function:
> 
> static int __devinit
> pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)

It comes from the driver itself, as you point out:

>   I have the (pci card) data hard-coded in the following tables of
> 8250_pci.c file:
>           static struct pci_device_id serial_pci_tbl[]
>           static struct pci_board pci_boards[] __devinitdata={...}

Yup, that's what the pci core sets that pointer to.

> Since I could not find the data in the pci_device_id for pci card, I
> went thru the drivers/pci/search.c and drivers/pci/pci-driver.c files. I
> am not successful in locating those codes that populate the
> pci_device_id structure for a given pci card.

drivers/pci/pci-driver.c::pci_device_probe_static() does it.  See the
latest edition of the Linux Device Drivers book for a full description
and walk-through of how a pci device get added and removed from the
driver core (it's free online if you don't want to buy it.)

Hope this helps,

greg k-h