[SERIAL] sunzilog: Fix instance enumeration.

Just do a linear enumeration so that we handle sun4d systems
correctly.  As a consequence, eliminate the hard coded keyboard and
mouse channel line values, use the CONS_{KEYB,MS} flags instead.

Also, report the keyboard/mouse Zilog channels just like the uart ones
do.

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

1 files changed, 35 insertions, 36 deletions

diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c
index 18df10f49aff..47bc3d57e019 100644
--- a/drivers/serial/sunzilog.c
+++ b/drivers/serial/sunzilog.c
@@ -68,9 +68,6 @@ static int num_sunzilog;
 #define NUM_SUNZILOG    num_sunzilog
 #define NUM_CHANNELS    (NUM_SUNZILOG * 2)
 
-#define KEYBOARD_LINE 0x2
-#define MOUSE_LINE    0x3
-
 #define ZS_CLOCK                4915200 /* Zilog input clock rate. */
 #define ZS_CLOCK_DIVISOR        16      /* Divisor this driver uses. */
 
@@ -1225,12 +1222,10 @@ static void __init sunzilog_init_kbdms(struct uart_sunzilog_port *up, int channe
 {
         int baud, brg;
 
-        if (channel == KEYBOARD_LINE) {
-                up->flags |= SUNZILOG_FLAG_CONS_KEYB;
+        if (up->flags & SUNZILOG_FLAG_CONS_KEYB) {
                 up->cflag = B1200 | CS8 | CLOCAL | CREAD;
                 baud = 1200;
         } else {
-                up->flags |= SUNZILOG_FLAG_CONS_MOUSE;
                 up->cflag = B4800 | CS8 | CLOCAL | CREAD;
                 baud = 4800;
         }
@@ -1243,14 +1238,14 @@ static void __init sunzilog_init_kbdms(struct uart_sunzilog_port *up, int channe
 }
 
 #ifdef CONFIG_SERIO
-static void __init sunzilog_register_serio(struct uart_sunzilog_port *up, int channel)
+static void __init sunzilog_register_serio(struct uart_sunzilog_port *up)
 {
         struct serio *serio = &up->serio;
 
         serio->port_data = up;
 
         serio->id.type = SERIO_RS232;
-        if (channel == KEYBOARD_LINE) {
+        if (up->flags & SUNZILOG_FLAG_CONS_KEYB) {
                 serio->id.proto = SERIO_SUNKBD;
                 strlcpy(serio->name, "zskbd", sizeof(serio->name));
         } else {
@@ -1259,7 +1254,8 @@ static void __init sunzilog_register_serio(struct uart_sunzilog_port *up, int ch
                 strlcpy(serio->name, "zsms", sizeof(serio->name));
         }
         strlcpy(serio->phys,
-                (channel == KEYBOARD_LINE ? "zs/serio0" : "zs/serio1"),
+                ((up->flags & SUNZILOG_FLAG_CONS_KEYB) ?
+                 "zs/serio0" : "zs/serio1"),
                 sizeof(serio->phys));
 
         serio->write = sunzilog_serio_write;
@@ -1286,8 +1282,8 @@ static void __init sunzilog_init_hw(struct uart_sunzilog_port *up)
                 (void) read_zsreg(channel, R0);
         }
 
-        if (up->port.line == KEYBOARD_LINE ||
-            up->port.line == MOUSE_LINE) {
+        if (up->flags & (SUNZILOG_FLAG_CONS_KEYB |
+                         SUNZILOG_FLAG_CONS_MOUSE)) {
                 sunzilog_init_kbdms(up, up->port.line);
                 up->curregs[R9] |= (NV | MIE);
                 write_zsreg(channel, R9, up->curregs[R9]);
@@ -1313,36 +1309,26 @@ static void __init sunzilog_init_hw(struct uart_sunzilog_port *up)
         spin_unlock_irqrestore(&up->port.lock, flags);
 
 #ifdef CONFIG_SERIO
-        if (up->port.line == KEYBOARD_LINE || up->port.line == MOUSE_LINE)
-                sunzilog_register_serio(up, up->port.line);
+        if (up->flags & (SUNZILOG_FLAG_CONS_KEYB |
+                         SUNZILOG_FLAG_CONS_MOUSE))
+                sunzilog_register_serio(up);
 #endif
 }
 
-static int __devinit zs_get_instance(struct device_node *dp)
-{
-        int ret;
-
-        ret = of_getintprop_default(dp, "slave", -1);
-        if (ret != -1)
-                return ret;
-
-        if (of_find_property(dp, "keyboard", NULL))
-                ret = 1;
-        else
-                ret = 0;
-
-        return ret;
-}
-
 static int zilog_irq = -1;
 
 static int __devinit zs_probe(struct of_device *op, const struct of_device_id *match)
 {
+        static int inst;
         struct uart_sunzilog_port *up;
         struct zilog_layout __iomem *rp;
-        int inst = zs_get_instance(op->node);
+        int keyboard_mouse;
         int err;
 
+        keyboard_mouse = 0;
+        if (of_find_property(op->node, "keyboard", NULL))
+                keyboard_mouse = 1;
+
         sunzilog_chip_regs[inst] = of_ioremap(&op->resource[0], 0,
                                               sizeof(struct zilog_layout),
                                               "zs");
@@ -1369,7 +1355,7 @@ static int __devinit zs_probe(struct of_device *op, const struct of_device_id *m
         up[0].port.line = (inst * 2) + 0;
         up[0].port.dev = &op->dev;
         up[0].flags |= SUNZILOG_FLAG_IS_CHANNEL_A;
-        if (inst == 1)
+        if (keyboard_mouse)
                 up[0].flags |= SUNZILOG_FLAG_CONS_KEYB;
         sunzilog_init_hw(&up[0]);
 
@@ -1386,11 +1372,11 @@ static int __devinit zs_probe(struct of_device *op, const struct of_device_id *m
         up[1].port.line = (inst * 2) + 1;
         up[1].port.dev = &op->dev;
         up[1].flags |= 0;
-        if (inst == 1)
+        if (keyboard_mouse)
                 up[1].flags |= SUNZILOG_FLAG_CONS_MOUSE;
         sunzilog_init_hw(&up[1]);
 
-        if (inst != 1) {
+        if (!keyboard_mouse) {
                 err = uart_add_one_port(&sunzilog_reg, &up[0].port);
                 if (err) {
                         of_iounmap(rp, sizeof(struct zilog_layout));
@@ -1402,10 +1388,19 @@ static int __devinit zs_probe(struct of_device *op, const struct of_device_id *m
                         of_iounmap(rp, sizeof(struct zilog_layout));
                         return err;
                 }
+        } else {
+                printk(KERN_INFO "%s: Keyboard at MMIO %lx (irq = %d) "
+                       "is a zs\n",
+                       op->dev.bus_id, up[0].port.mapbase, op->irqs[0]);
+                printk(KERN_INFO "%s: Mouse at MMIO %lx (irq = %d) "
+                       "is a zs\n",
+                       op->dev.bus_id, up[1].port.mapbase, op->irqs[0]);
         }
 
         dev_set_drvdata(&op->dev, &up[0]);
 
+        inst++;
+
         return 0;
 }
 
@@ -1454,10 +1449,15 @@ static int __init sunzilog_init(void)
 {
         struct device_node *dp;
         int err, uart_count;
+        int num_keybms;
 
         NUM_SUNZILOG = 0;
-        for_each_node_by_name(dp, "zs")
+        num_keybms = 0;
+        for_each_node_by_name(dp, "zs") {
                 NUM_SUNZILOG++;
+                if (of_find_property(dp, "keyboard", NULL))
+                        num_keybms++;
+        }
 
         uart_count = 0;
         if (NUM_SUNZILOG) {
@@ -1467,8 +1467,7 @@ static int __init sunzilog_init(void)
                 if (err)
                         goto out;
 
-                /* Subtract 1 for keyboard, 1 for mouse.  */
-                uart_count = (NUM_SUNZILOG * 2) - 2;
+                uart_count = (NUM_SUNZILOG * 2) - (2 * num_keybms);
 
                 sunzilog_reg.nr = uart_count;
                 sunzilog_reg.minor = sunserial_current_minor;