[SPARC]: Fix serial console device detection.

The current scheme works on static interpretation of text names, which
is wrong.

The output-device setting, for example, must be resolved via an alias
or similar to a full path name to the console device.

Paths also contain an optional set of 'options', which starts with a
colon at the end of the path.  The option area is used to specify
which of two serial ports ('a' or 'b') the path refers to when a
device node drives multiple ports.  'a' is assumed if the option
specification is missing.

This was caught by the UltraSPARC-T1 simulator.  The 'output-device'
property was set to 'ttya' and we didn't pick upon the fact that this
is an OBP alias set to '/virtual-devices/console'.  Instead we saw it
as the first serial console device, instead of the hypervisor console.

The infrastructure is now there to take advantage of this to resolve
the console correctly even in multi-head situations in fbcon too.

Thanks to Greg Onufer for the bug report.

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 2 insertions, 118 deletions

diff --git a/arch/sparc/prom/console.c b/arch/sparc/prom/console.c
index 4e6e41d3291d..8d1cfb0d5068 100644
--- a/arch/sparc/prom/console.c
+++ b/arch/sparc/prom/console.c
@@ -102,119 +102,3 @@ prom_putchar(char c)
         while(prom_nbputchar(c) == -1) ;
         return;
 }
-
-/* Query for input device type */
-enum prom_input_device
-prom_query_input_device(void)
-{
-        unsigned long flags;
-        int st_p;
-        char propb[64];
-        char *p;
-        int propl;
-
-        switch(prom_vers) {
-        case PROM_V0:
-        case PROM_V2:
-        case PROM_SUN4:
-        default:
-                switch(*romvec->pv_stdin) {
-                case PROMDEV_KBD:       return PROMDEV_IKBD;
-                case PROMDEV_TTYA:      return PROMDEV_ITTYA;
-                case PROMDEV_TTYB:      return PROMDEV_ITTYB;
-                default:
-                        return PROMDEV_I_UNK;
-                };
-        case PROM_V3:
-                spin_lock_irqsave(&prom_lock, flags);
-                st_p = (*romvec->pv_v2devops.v2_inst2pkg)(*romvec->pv_v2bootargs.fd_stdin);
-                restore_current();
-                spin_unlock_irqrestore(&prom_lock, flags);
-                if(prom_node_has_property(st_p, "keyboard"))
-                        return PROMDEV_IKBD;
-                if (prom_getproperty(st_p, "name", propb, sizeof(propb)) != -1) {
-                        if(strncmp(propb, "keyboard", sizeof("serial")) == 0)
-                                return PROMDEV_IKBD;
-                }
-                if (prom_getproperty(st_p, "device_type", propb, sizeof(propb)) != -1) {
-                if(strncmp(propb, "serial", sizeof("serial")))
-                        return PROMDEV_I_UNK;
-                }
-                propl = prom_getproperty(prom_root_node, "stdin-path", propb, sizeof(propb));
-                if(propl > 2) {
-                        p = propb;
-                        while(*p) p++; p -= 2;
-                        if(p[0] == ':') {
-                                if(p[1] == 'a')
-                                        return PROMDEV_ITTYA;
-                                else if(p[1] == 'b')
-                                        return PROMDEV_ITTYB;
-                        }
-                }
-                return PROMDEV_I_UNK;
-        }
-}
-
-/* Query for output device type */
-
-enum prom_output_device
-prom_query_output_device(void)
-{
-        unsigned long flags;
-        int st_p;
-        char propb[64];
-        char *p;
-        int propl;
-
-        switch(prom_vers) {
-        case PROM_V0:
-        case PROM_SUN4:
-                switch(*romvec->pv_stdin) {
-                case PROMDEV_SCREEN:    return PROMDEV_OSCREEN;
-                case PROMDEV_TTYA:      return PROMDEV_OTTYA;
-                case PROMDEV_TTYB:      return PROMDEV_OTTYB;
-                };
-                break;
-        case PROM_V2:
-        case PROM_V3:
-                spin_lock_irqsave(&prom_lock, flags);
-                st_p = (*romvec->pv_v2devops.v2_inst2pkg)(*romvec->pv_v2bootargs.fd_stdout);
-                restore_current();
-                spin_unlock_irqrestore(&prom_lock, flags);
-                propl = prom_getproperty(st_p, "device_type", propb, sizeof(propb));
-                if (propl == sizeof("display") &&
-                        strncmp("display", propb, sizeof("display")) == 0)
-                {
-                        return PROMDEV_OSCREEN;
-                }
-                if(prom_vers == PROM_V3) {
-                        if(propl >= 0 &&
-                            strncmp("serial", propb, sizeof("serial")) != 0)
-                                return PROMDEV_O_UNK;
-                        propl = prom_getproperty(prom_root_node, "stdout-path",
-                                                 propb, sizeof(propb));
-                        if(propl == CON_SIZE_JMC &&
-                            strncmp(propb, con_name_jmc, CON_SIZE_JMC) == 0)
-                                return PROMDEV_OTTYA;
-                        if(propl > 2) {
-                                p = propb;
-                                while(*p) p++; p-= 2;
-                                if(p[0]==':') {
-                                        if(p[1] == 'a')
-                                                return PROMDEV_OTTYA;
-                                        else if(p[1] == 'b')
-                                                return PROMDEV_OTTYB;
-                                }
-                        }
-                } else {
-                        switch(*romvec->pv_stdin) {
-                        case PROMDEV_TTYA:      return PROMDEV_OTTYA;
-                        case PROMDEV_TTYB:      return PROMDEV_OTTYB;
-                        };
-                }
-                break;
-        default:
-                ;
-        };
-        return PROMDEV_O_UNK;
-}
diff --git a/arch/sparc/prom/misc.c b/arch/sparc/prom/misc.c
index 1942c7c05cb1..37cff5f54704 100644
--- a/arch/sparc/prom/misc.c
+++ b/arch/sparc/prom/misc.c
@@ -58,7 +58,7 @@ prom_cmdline(void)
         extern void install_linux_ticker(void);
         unsigned long flags;
 
-        if(!serial_console && prom_palette)
+        if (prom_palette)
                 prom_palette (1);
         spin_lock_irqsave(&prom_lock, flags);
         install_obp_ticker();
@@ -69,7 +69,7 @@ prom_cmdline(void)
 #ifdef CONFIG_SUN_AUXIO
         set_auxio(AUXIO_LED, 0);
 #endif
-        if(!serial_console && prom_palette)
+        if (prom_palette)
                 prom_palette (0);
 }