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| author | Olaf Hering <olaf@aepfle.de> | 2008-01-22 02:37:45 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-01-25 22:52:55 +1100 |
| commit | 5bc977867f36fc36cde43b309b891b2f7b714f52 (patch) | |
| tree | df65ee9fe33058b9f31ee6a5166267270487fe37 | |
| parent | 092ca5bd61da6344f3b249754b337f2d48dfe08d (diff) | |
| download | linux-3.10-5bc977867f36fc36cde43b309b891b2f7b714f52.tar.gz linux-3.10-5bc977867f36fc36cde43b309b891b2f7b714f52.tar.bz2 linux-3.10-5bc977867f36fc36cde43b309b891b2f7b714f52.zip | |
[POWERPC] Autodetect serial console on pegasos2
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/platforms/chrp/setup.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c index 42a21bab76c..116babbaaf8 100644 --- a/arch/powerpc/platforms/chrp/setup.c +++ b/arch/powerpc/platforms/chrp/setup.c @@ -256,6 +256,57 @@ static void briq_restart(char *cmd) for(;;); } +/* + * Per default, input/output-device points to the keyboard/screen + * If no card is installed, the built-in serial port is used as a fallback. + * But unfortunately, the firmware does not connect /chosen/{stdin,stdout} + * the the built-in serial node. Instead, a /failsafe node is created. + */ +static void chrp_init_early(void) +{ + struct device_node *node; + const char *property; + + if (strstr(cmd_line, "console=")) + return; + /* find the boot console from /chosen/stdout */ + if (!of_chosen) + return; + node = of_find_node_by_path("/"); + if (!node) + return; + property = of_get_property(node, "model", NULL); + if (!property) + goto out_put; + if (strcmp(property, "Pegasos2")) + goto out_put; + /* this is a Pegasos2 */ + property = of_get_property(of_chosen, "linux,stdout-path", NULL); + if (!property) + goto out_put; + of_node_put(node); + node = of_find_node_by_path(property); + if (!node) + return; + property = of_get_property(node, "device_type", NULL); + if (!property) + goto out_put; + if (strcmp(property, "serial")) + goto out_put; + /* + * The 9pin connector is either /failsafe + * or /pci@80000000/isa@C/serial@i2F8 + * The optional graphics card has also type 'serial' in VGA mode. + */ + property = of_get_property(node, "name", NULL); + if (!property) + goto out_put; + if (!strcmp(property, "failsafe") || !strcmp(property, "serial")) + add_preferred_console("ttyS", 0, NULL); +out_put: + of_node_put(node); +} + void __init chrp_setup_arch(void) { struct device_node *root = of_find_node_by_path("/"); @@ -599,6 +650,7 @@ define_machine(chrp) { .probe = chrp_probe, .setup_arch = chrp_setup_arch, .init = chrp_init2, + .init_early = chrp_init_early, .show_cpuinfo = chrp_show_cpuinfo, .init_IRQ = chrp_init_IRQ, .restart = rtas_restart, |