[U-Boot] rtl8169: use dm_pci_map_bar

[Stefan Roese <sr@denx.de>]

Added Bin, Joe and Thierry to Cc

On 11.06.19 13:15, Patrick Wildt wrote:
> Hi,
> 
> I have an rtl8169 on a macchiatobin and that card has a 64-bit
> memory address.  The current code only reads a single word, which
> means it can only support a 32-bit address.  By using dm_pci_map_bar
> we don't need to manually parse the register, we can just have it do
> its job.
> 
> I'm not sure though if this works for all devices since the previous
> version had an explicit check for the device.
> 
> Patrick
> 
> Signed-off-by: Patrick Wildt <patrick@blueri.se>
> 
> diff --git a/drivers/net/rtl8169.c b/drivers/net/rtl8169.c
> index 521e5909a2..f1d2ade253 100644
> --- a/drivers/net/rtl8169.c
> +++ b/drivers/net/rtl8169.c
> @@ -1182,22 +1182,11 @@ static int rtl8169_eth_probe(struct udevice *dev)
>   	struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
>   	struct rtl8169_private *priv = dev_get_priv(dev);
>   	struct eth_pdata *plat = dev_get_platdata(dev);
> -	u32 iobase;
> -	int region;
>   	int ret;
>   
> -	debug("rtl8169: REALTEK RTL8169 @0x%x\n", iobase);
> -	switch (pplat->device) {
> -	case 0x8168:
> -		region = 2;
> -		break;
> -	default:
> -		region = 1;
> -		break;
> -	}
> -	dm_pci_read_config32(dev, PCI_BASE_ADDRESS_0 + region * 4, &iobase);
> -	iobase &= ~0xf;
> -	priv->iobase = (int)dm_pci_mem_to_phys(dev, iobase);
> +	priv->iobase = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_2,
> +				      PCI_REGION_MEM);
> +	printf("rtl8169: REALTEK RTL8169 @0x%x\n", priv->iobase);
>   
>   	ret = rtl_init(priv->iobase, dev->name, plat->enetaddr);
>   	if (ret < 0) {

Bin, Joe, Thierry,

do you have any comments on this patch? Moving unconditionally to one
BAR instead of BAR1/2 depending on the chip version seems a bit
"brave".

Thanks,
Stefan