[SPARC64]: Serial Console for E250 Patch

From: Eddie C. Dost <ecd@brainaid.de>

I have the following patch for serial console over the RSC
(remote system controller) on my E250 machine. It basically adds
support for input-device=rsc and output-device=rsc from OBP, and
allows 115200,8,n,1,- serial mode setting.

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

5 files changed, 48 insertions, 5 deletions

diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c
index 250745896aee..054461e6946d 100644
--- a/arch/sparc64/kernel/setup.c
+++ b/arch/sparc64/kernel/setup.c
@@ -561,6 +561,8 @@ static int __init set_preferred_console(void)
                 serial_console = 1;
         } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
                 serial_console = 2;
+        } else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) {
+                serial_console = 3;
         } else {
                 prom_printf("Inconsistent console: "
                             "input %d, output %d\n",
diff --git a/arch/sparc64/prom/console.c b/arch/sparc64/prom/console.c
index eae5db8dda56..ac6d035dd150 100644
--- a/arch/sparc64/prom/console.c
+++ b/arch/sparc64/prom/console.c
@@ -99,8 +99,12 @@ prom_query_input_device(void)
         if (!strncmp(propb, "keyboard", 8))
                 return PROMDEV_ITTYA;
 
+        if (!strncmp (propb, "rsc", 3))
+                return PROMDEV_IRSC;
+
         if (strncmp (propb, "tty", 3) || !propb[3])
                 return PROMDEV_I_UNK;
+
         switch (propb[3]) {
                 case 'a': return PROMDEV_ITTYA;
                 case 'b': return PROMDEV_ITTYB;
@@ -136,8 +140,12 @@ prom_query_output_device(void)
         if (!strncmp(propb, "screen", 6))
                 return PROMDEV_OTTYA;
 
+        if (!strncmp (propb, "rsc", 3))
+                return PROMDEV_ORSC;
+
         if (strncmp (propb, "tty", 3) || !propb[3])
                 return PROMDEV_O_UNK;
+
         switch (propb[3]) {
                 case 'a': return PROMDEV_OTTYA;
                 case 'b': return PROMDEV_OTTYB;
diff --git a/drivers/serial/suncore.c b/drivers/serial/suncore.c
index 5fc4a62173d9..fa4ae94243c2 100644
--- a/drivers/serial/suncore.c
+++ b/drivers/serial/suncore.c
@@ -34,6 +34,7 @@ sunserial_console_termios(struct console *con)
         char *mode_prop = "ttyX-mode";
         char *cd_prop = "ttyX-ignore-cd";
         char *dtr_prop = "ttyX-rts-dtr-off";
+        char *ssp_console_modes_prop = "ssp-console-modes";
         int baud, bits, stop, cflag;
         char parity;
         int carrier = 0;
@@ -43,14 +44,39 @@ sunserial_console_termios(struct console *con)
         if (!serial_console)
                 return;
 
-        if (serial_console == 1) {
+        switch (serial_console) {
+        case PROMDEV_OTTYA:
                 mode_prop[3] = 'a';
                 cd_prop[3] = 'a';
                 dtr_prop[3] = 'a';
-        } else {
+                break;
+
+        case PROMDEV_OTTYB:
                 mode_prop[3] = 'b';
                 cd_prop[3] = 'b';
                 dtr_prop[3] = 'b';
+                break;
+
+        case PROMDEV_ORSC:
+
+                nd = prom_pathtoinode("rsc");
+                if (!nd) {
+                        strcpy(mode, "115200,8,n,1,-");
+                        goto no_options;
+                }
+
+                if (!prom_node_has_property(nd, ssp_console_modes_prop)) {
+                        strcpy(mode, "115200,8,n,1,-");
+                        goto no_options;
+                }
+
+                memset(mode, 0, sizeof(mode));
+                prom_getstring(nd, ssp_console_modes_prop, mode, sizeof(mode));
+                goto no_options;
+
+        default:
+                strcpy(mode, "9600,8,n,1,-");
+                goto no_options;
         }
 
         topnd = prom_getchild(prom_root_node);
@@ -110,6 +136,10 @@ no_options:
                 case 9600: cflag |= B9600; break;
                 case 19200: cflag |= B19200; break;
                 case 38400: cflag |= B38400; break;
+                case 57600: cflag |= B57600; break;
+                case 115200: cflag |= B115200; break;
+                case 230400: cflag |= B230400; break;
+                case 460800: cflag |= B460800; break;
                 default: baud = 9600; cflag |= B9600; break;
         }
 
diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c
index 7e773ff76c61..8bcaebcc0ad7 100644
--- a/drivers/serial/sunsab.c
+++ b/drivers/serial/sunsab.c
@@ -897,9 +897,6 @@ static int sunsab_console_setup(struct console *con, char *options)
 
         sunserial_console_termios(con);
 
-        /* Firmware console speed is limited to 150-->38400 baud so
-         * this hackish cflag thing is OK.
-         */
         switch (con->cflag & CBAUD) {
         case B150: baud = 150; break;
         case B300: baud = 300; break;
@@ -910,6 +907,10 @@ static int sunsab_console_setup(struct console *con, char *options)
         default: case B9600: baud = 9600; break;
         case B19200: baud = 19200; break;
         case B38400: baud = 38400; break;
+        case B57600: baud = 57600; break;
+        case B115200: baud = 115200; break;
+        case B230400: baud = 230400; break;
+        case B460800: baud = 460800; break;
         };
 
         /*
diff --git a/include/asm-sparc64/oplib.h b/include/asm-sparc64/oplib.h
index d02f1e8ae1a6..3c59b2693fb9 100644
--- a/include/asm-sparc64/oplib.h
+++ b/include/asm-sparc64/oplib.h
@@ -163,6 +163,7 @@ enum prom_input_device {
         PROMDEV_IKBD,                   /* input from keyboard */
         PROMDEV_ITTYA,                  /* input from ttya */
         PROMDEV_ITTYB,                  /* input from ttyb */
+        PROMDEV_IRSC,                   /* input from rsc */
         PROMDEV_I_UNK,
 };
 
@@ -174,6 +175,7 @@ enum prom_output_device {
         PROMDEV_OSCREEN,                /* to screen */
         PROMDEV_OTTYA,                  /* to ttya */
         PROMDEV_OTTYB,                  /* to ttyb */
+        PROMDEV_ORSC,                   /* to rsc */
         PROMDEV_O_UNK,
 };