1 files changed, 152 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/auxio.c b/arch/sparc64/kernel/auxio.c
new file mode 100644
index 00000000000..a0716ccc2f4
--- /dev/null
+++ b/arch/sparc64/kernel/auxio.c
@@ -0,0 +1,152 @@
+/* auxio.c: Probing for the Sparc AUXIO register at boot time.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ *
+ * Refactoring for unified NCR/PCIO support 2002 Eric Brower (ebrower@usa.net)
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+
+#include <asm/oplib.h>
+#include <asm/io.h>
+#include <asm/sbus.h>
+#include <asm/ebus.h>
+#include <asm/auxio.h>
+
+/* This cannot be static, as it is referenced in entry.S */
+void __iomem *auxio_register = NULL;
+
+enum auxio_type {
+	AUXIO_TYPE_NODEV,
+	AUXIO_TYPE_SBUS,
+	AUXIO_TYPE_EBUS
+};
+
+static enum auxio_type auxio_devtype = AUXIO_TYPE_NODEV;
+static DEFINE_SPINLOCK(auxio_lock);
+
+static void __auxio_sbus_set(u8 bits_on, u8 bits_off)
+{
+	if (auxio_register) {
+		unsigned char regval;
+		unsigned long flags;
+		unsigned char newval;
+
+		spin_lock_irqsave(&auxio_lock, flags);
+
+		regval =  sbus_readb(auxio_register);
+		newval =  regval | bits_on;
+		newval &= ~bits_off;
+		newval &= ~AUXIO_AUX1_MASK;
+		sbus_writeb(newval, auxio_register);
+		
+		spin_unlock_irqrestore(&auxio_lock, flags);
+	}
+}
+
+static void __auxio_ebus_set(u8 bits_on, u8 bits_off)
+{
+	if (auxio_register) {
+		unsigned char regval;
+		unsigned long flags;
+		unsigned char newval;
+
+		spin_lock_irqsave(&auxio_lock, flags);
+
+		regval =  (u8)readl(auxio_register);
+		newval =  regval | bits_on;
+		newval &= ~bits_off;
+		writel((u32)newval, auxio_register);
+
+		spin_unlock_irqrestore(&auxio_lock, flags);
+	}
+}
+
+static inline void __auxio_ebus_set_led(int on)
+{
+	(on) ? __auxio_ebus_set(AUXIO_PCIO_LED, 0) :
+		__auxio_ebus_set(0, AUXIO_PCIO_LED) ;
+}
+
+static inline void __auxio_sbus_set_led(int on)
+{
+	(on) ? __auxio_sbus_set(AUXIO_AUX1_LED, 0) :
+		__auxio_sbus_set(0, AUXIO_AUX1_LED) ;
+}
+
+void auxio_set_led(int on)
+{
+	switch(auxio_devtype) {
+	case AUXIO_TYPE_SBUS:
+		__auxio_sbus_set_led(on);
+		break;
+	case AUXIO_TYPE_EBUS:
+		__auxio_ebus_set_led(on);
+		break;
+	default:
+		break;
+	}
+}
+
+static inline void __auxio_sbus_set_lte(int on)
+{
+	(on) ? __auxio_sbus_set(AUXIO_AUX1_LTE, 0) : 
+		__auxio_sbus_set(0, AUXIO_AUX1_LTE) ;
+}
+
+void auxio_set_lte(int on)
+{
+	switch(auxio_devtype) {
+	case AUXIO_TYPE_SBUS:
+		__auxio_sbus_set_lte(on);
+		break;
+	case AUXIO_TYPE_EBUS:
+		/* FALL-THROUGH */
+	default:
+		break;
+	}
+}
+
+void __init auxio_probe(void)
+{
+        struct sbus_bus *sbus;
+        struct sbus_dev *sdev = NULL;
+
+        for_each_sbus(sbus) {
+                for_each_sbusdev(sdev, sbus) {
+                        if(!strcmp(sdev->prom_name, "auxio"))
+				goto found_sdev;
+                }
+        }
+
+found_sdev:
+	if (sdev) {
+		auxio_devtype  = AUXIO_TYPE_SBUS;
+		auxio_register = sbus_ioremap(&sdev->resource[0], 0,
+					      sdev->reg_addrs[0].reg_size,
+					      "auxiliaryIO");
+	}
+#ifdef CONFIG_PCI
+	else {
+		struct linux_ebus *ebus;
+		struct linux_ebus_device *edev = NULL;
+
+		for_each_ebus(ebus) {
+			for_each_ebusdev(edev, ebus) {
+				if (!strcmp(edev->prom_name, "auxio"))
+					goto ebus_done;
+			}
+		}
+	ebus_done:
+		if (edev) {
+			auxio_devtype  = AUXIO_TYPE_EBUS;
+			auxio_register =
+				ioremap(edev->resource[0].start, sizeof(u32));
+		}
+	}
+	auxio_set_led(AUXIO_LED_ON);
+#endif
+}