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pci: Add ability to re-enumerate PCI buses

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Add a new 'pci enum' command which re-enumerates the PCI buses.  This
command is enabled via the CONFIG_CMD_PCI_ENUM define and can be useful
in boards with FPGAs connected via PCI/PCIe, boards that support PCI
hot-plugging, or during PCI debug.

Also enable the 'pci enum' command for X-ES's Freescale-based boards.

Signed-off-by: John Schmoller <jschmoller@xes-inc.com>
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Wolfgang Denk <wd@denx.de>
This commit is contained in:
John Schmoller 2010-10-22 00:20:23 -05:00 • committed by Kumar Gala
parent 9660c5de74
commit 96d6160324
6 changed files with 22 additions and 1 deletions
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13
common/cmd_pci.c
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@ -497,6 +497,10 @@ int do_pci (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
if ((bdf = get_pci_dev(argv[2])) == -1)
return 1;
break;
#ifdef CONFIG_CMD_PCI_ENUM
case 'e':
break;
#endif
default: /* scan bus */
value = 1; /* short listing */
bdf = 0; /* bus number */
@ -518,6 +522,11 @@ int do_pci (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
return 0;
case 'd': /* display */
return pci_cfg_display(bdf, addr, size, value);
#ifdef CONFIG_CMD_PCI_ENUM
case 'e':
pci_init();
return 0;
#endif
case 'n': /* next */
if (argc < 4)
goto usage;
@ -545,6 +554,10 @@ U_BOOT_CMD(
"list and access PCI Configuration Space",
"[bus] [long]\n"
" - short or long list of PCI devices on bus 'bus'\n"
#ifdef CONFIG_CMD_PCI_ENUM
"pci enum\n"
" - re-enumerate PCI buses\n"
#endif
"pci header b.d.f\n"
" - show header of PCI device 'bus.device.function'\n"
"pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"