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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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
common/cmd_pci.c
View File

@ -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"

3
drivers/pci/fsl_pci_init.c
View File

@ -91,6 +91,9 @@ int fsl_setup_hose(struct pci_controller *hose, unsigned long addr)
{
volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *) addr;
/* Reset hose to make sure its in a clean state */
memset(hose, 0, sizeof(struct pci_controller));
pci_setup_indirect(hose, (u32)&pci->cfg_addr, (u32)&pci->cfg_data);
return fsl_is_pci_agent(hose);

4
drivers/pci/pci.c
View File

@ -139,7 +139,7 @@ void *pci_map_bar(pci_dev_t pdev, int bar, int flags)
*
*/
static struct pci_controller* hose_head = NULL;
static struct pci_controller* hose_head;
void pci_register_hose(struct pci_controller* hose)
{
@ -640,6 +640,8 @@ void pci_init(void)
}
#endif /* CONFIG_PCI_BOOTDELAY */
hose_head = NULL;
/* now call board specific pci_init()... */
pci_init_board();
}

1
include/configs/XPEDITE5170.h
View File

@ -545,6 +545,7 @@ extern unsigned long get_board_sys_clk(unsigned long dummy);
#define CONFIG_CMD_PCA953X
#define CONFIG_CMD_PCA953X_INFO
#define CONFIG_CMD_PCI
#define CONFIG_CMD_PCI_ENUM
#define CONFIG_CMD_PING
#define CONFIG_CMD_REGINFO
#define CONFIG_CMD_SNTP

1
include/configs/XPEDITE5200.h
View File

@ -339,6 +339,7 @@
#define CONFIG_CMD_PCA953X
#define CONFIG_CMD_PCA953X_INFO
#define CONFIG_CMD_PCI
#define CONFIG_CMD_PCI_ENUM
#define CONFIG_CMD_PING
#define CONFIG_CMD_SNTP
#define CONFIG_CMD_REGINFO

1
include/configs/XPEDITE5370.h
View File

@ -396,6 +396,7 @@ extern unsigned long get_board_ddr_clk(unsigned long dummy);
#define CONFIG_CMD_PCA953X
#define CONFIG_CMD_PCA953X_INFO
#define CONFIG_CMD_PCI
#define CONFIG_CMD_PCI_ENUM
#define CONFIG_CMD_PING
#define CONFIG_CMD_SAVEENV
#define CONFIG_CMD_SNTP