GitHub-Mirror/u-boot
2
0
Fork 0
mirror of https://github.com/Fishwaldo/u-boot.git synced 2025-03-19 13:41:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

serial: ns16550: Support ns16550 compatible pci uart devices

Browse source 
There are many pci uart devices which are ns16550 compatible. We can
describe them in the board dts file and use it as the U-Boot serial
console as specified in the chosen node 'stdout-path' property.

Those pci uart devices can have their register be memory-mapped, or
i/o-mapped. The driver will try to use the memory-mapped register if
the reg property in the node has an entry to describe the memory-mapped
register, otherwise i/o-mapped register will be used.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2014-12-31 16:05:12 +08:00 • committed by Simon Glass
parent a62e84d7b1
commit 3db886a5bf
1 changed files with 31 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

31
drivers/serial/ns16550.c
View file

@ -289,7 +289,38 @@ int ns16550_serial_ofdata_to_platdata(struct udevice *dev)
struct ns16550_platdata *plat = dev->platdata; struct ns16550_platdata *plat = dev->platdata;
fdt_addr_t addr; fdt_addr_t addr;
/* try Processor Local Bus device first */
addr = fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg"); addr = fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
#ifdef CONFIG_PCI
if (addr == FDT_ADDR_T_NONE) {
/* then try pci device */
struct fdt_pci_addr pci_addr;
u32 bar;
int ret;
/* we prefer to use a memory-mapped register */
ret = fdtdec_get_pci_addr(gd->fdt_blob, dev->of_offset,
FDT_PCI_SPACE_MEM32, "reg",
&pci_addr);
if (ret) {
/* try if there is any i/o-mapped register */
ret = fdtdec_get_pci_addr(gd->fdt_blob,
dev->of_offset,
FDT_PCI_SPACE_IO,
"reg", &pci_addr);
if (ret)
return ret;
}
ret = fdtdec_get_pci_bar32(gd->fdt_blob, dev->of_offset,
&pci_addr, &bar);
if (ret)
return ret;
addr = bar;
}
#endif
if (addr == FDT_ADDR_T_NONE) if (addr == FDT_ADDR_T_NONE)
return -EINVAL; return -EINVAL;