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authorStephen Warren <swarren@nvidia.com>2016-01-26 11:10:11 -0700
committerSimon Glass <sjg@chromium.org>2016-01-28 21:01:23 -0700
commite578b92cdb378df0f09065e3222fe8620867a57a (patch)
treecf25531ba3caa3cb8c588d82fbcc1e7dc172980e /cmd
parentbe1df82656b15663dee9216a320dc177c7d9c6c4 (diff)
Implement "pci enum" command for CONFIG_DM_PCI
With CONFIG_DM_PCI enabled, PCI buses are not enumerated at boot, as they are without that config option enabled. No command exists to enumerate the PCI buses. Hence, unless some board-specific code causes PCI enumeration, PCI-based Ethernet devices are not detected, and network access is not available. This patch implements "pci enum" in the CONFIG_DM_PCI case, thus giving a mechanism whereby PCI can be enumerated. do_pci()'s handling of case 'e' is moved into a single location before the dev variable is assigned, in order to skip calculation of dev. The enum sub-command doesn't need the dev value, and skipping its calculation avoids an irrelevant error being printed. Using a command to initialize PCI like this has a disadvantage relative to enumerating PCI at boot. In particular, Ethernet devices are not probed during PCI enumeration, but only when used. This defers setting variables such as ethact, ethaddr, etc. until the first network-related command is executed. Hopefully this will not cause further issues. Perhaps in the long term, we need a "net start/enum" command too? Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'cmd')
-rw-r--r--cmd/pci.c18
1 files changed, 5 insertions, 13 deletions
diff --git a/cmd/pci.c b/cmd/pci.c
index 8094d3380fb..2f4978af9fe 100644
--- a/cmd/pci.c
+++ b/cmd/pci.c
@@ -578,9 +578,10 @@ static 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
+#if defined(CONFIG_CMD_PCI_ENUM) || defined(CONFIG_DM_PCI)
case 'e':
- break;
+ pci_init();
+ return 0;
#endif
default: /* scan bus */
value = 1; /* short listing */
@@ -621,15 +622,6 @@ static int do_pci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
break;
case 'd': /* display */
return pci_cfg_display(dev, addr, size, value);
-#ifdef CONFIG_CMD_PCI_ENUM
- case 'e':
-# ifdef CONFIG_DM_PCI
- printf("This command is not yet supported with driver model\n");
-# else
- pci_init();
-# endif
- break;
-#endif
case 'n': /* next */
if (argc < 4)
goto usage;
@@ -665,9 +657,9 @@ static int do_pci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
static char pci_help_text[] =
"[bus] [long]\n"
" - short or long list of PCI devices on bus 'bus'\n"
-#ifdef CONFIG_CMD_PCI_ENUM
+#if defined(CONFIG_CMD_PCI_ENUM) || defined(CONFIG_DM_PCI)
"pci enum\n"
- " - re-enumerate PCI buses\n"
+ " - Enumerate PCI buses\n"
#endif
"pci header b.d.f\n"
" - show header of PCI device 'bus.device.function'\n"