diff options
Diffstat (limited to 'arch/powerpc/platforms/powermac/setup.c')
| -rw-r--r-- | arch/powerpc/platforms/powermac/setup.c | 78 |
1 files changed, 72 insertions, 6 deletions
diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c index 00bd0166d07..88ccf3a08a9 100644 --- a/arch/powerpc/platforms/powermac/setup.c +++ b/arch/powerpc/platforms/powermac/setup.c @@ -97,8 +97,6 @@ extern struct machdep_calls pmac_md; int sccdbg; #endif -extern void zs_kgdb_hook(int tty_num); - sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN; EXPORT_SYMBOL(sys_ctrler); @@ -329,10 +327,6 @@ static void __init pmac_setup_arch(void) l2cr_init(); #endif /* CONFIG_PPC32 */ -#ifdef CONFIG_KGDB - zs_kgdb_hook(0); -#endif - find_via_cuda(); find_via_pmu(); smu_init(); @@ -547,6 +541,78 @@ static int __init pmac_declare_of_platform_devices(void) } machine_device_initcall(powermac, pmac_declare_of_platform_devices); +#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE +/* + * This is called very early, as part of console_init() (typically just after + * time_init()). This function is respondible for trying to find a good + * default console on serial ports. It tries to match the open firmware + * default output with one of the available serial console drivers. + */ +static int __init check_pmac_serial_console(void) +{ + struct device_node *prom_stdout = NULL; + int offset = 0; + const char *name; +#ifdef CONFIG_SERIAL_PMACZILOG_TTYS + char *devname = "ttyS"; +#else + char *devname = "ttyPZ"; +#endif + + pr_debug(" -> check_pmac_serial_console()\n"); + + /* The user has requested a console so this is already set up. */ + if (strstr(boot_command_line, "console=")) { + pr_debug(" console was specified !\n"); + return -EBUSY; + } + + if (!of_chosen) { + pr_debug(" of_chosen is NULL !\n"); + return -ENODEV; + } + + /* We are getting a weird phandle from OF ... */ + /* ... So use the full path instead */ + name = of_get_property(of_chosen, "linux,stdout-path", NULL); + if (name == NULL) { + pr_debug(" no linux,stdout-path !\n"); + return -ENODEV; + } + prom_stdout = of_find_node_by_path(name); + if (!prom_stdout) { + pr_debug(" can't find stdout package %s !\n", name); + return -ENODEV; + } + pr_debug("stdout is %s\n", prom_stdout->full_name); + + name = of_get_property(prom_stdout, "name", NULL); + if (!name) { + pr_debug(" stdout package has no name !\n"); + goto not_found; + } + + if (strcmp(name, "ch-a") == 0) + offset = 0; + else if (strcmp(name, "ch-b") == 0) + offset = 1; + else + goto not_found; + of_node_put(prom_stdout); + + pr_debug("Found serial console at %s%d\n", devname, offset); + + return add_preferred_console(devname, offset, NULL); + + not_found: + pr_debug("No preferred console found !\n"); + of_node_put(prom_stdout); + return -ENODEV; +} +console_initcall(check_pmac_serial_console); + +#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ + /* * Called very early, MMU is off, device-tree isn't unflattened */ |