1 files changed, 149 insertions, 0 deletions

diff --git a/arch/sparc/kernel/auxio_64.c b/arch/sparc/kernel/auxio_64.c
new file mode 100644
index 000000000000..8b67347d4221
--- /dev/null
+++ b/arch/sparc/kernel/auxio_64.c
@@ -0,0 +1,149 @@
+/* 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/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/of_device.h>
+
+#include <asm/prom.h>
+#include <asm/io.h>
+#include <asm/auxio.h>
+
+void __iomem *auxio_register = NULL;
+EXPORT_SYMBOL(auxio_register);
+
+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_rmw(u8 bits_on, u8 bits_off, int ebus)
+{
+        if (auxio_register) {
+                unsigned long flags;
+                u8 regval, newval;
+
+                spin_lock_irqsave(&auxio_lock, flags);
+
+                regval = (ebus ?
+                          (u8) readl(auxio_register) :
+                          sbus_readb(auxio_register));
+                newval =  regval | bits_on;
+                newval &= ~bits_off;
+                if (!ebus)
+                        newval &= ~AUXIO_AUX1_MASK;
+                if (ebus)
+                        writel((u32) newval, auxio_register);
+                else
+                        sbus_writeb(newval, auxio_register);
+                
+                spin_unlock_irqrestore(&auxio_lock, flags);
+        }
+}
+
+static void __auxio_set_bit(u8 bit, int on, int ebus)
+{
+        u8 bits_on = (ebus ? AUXIO_PCIO_LED : AUXIO_AUX1_LED);
+        u8 bits_off = 0;
+
+        if (!on) {
+                u8 tmp = bits_off;
+                bits_off = bits_on;
+                bits_on = tmp;
+        }
+        __auxio_rmw(bits_on, bits_off, ebus);
+}
+
+void auxio_set_led(int on)
+{
+        int ebus = auxio_devtype == AUXIO_TYPE_EBUS;
+        u8 bit;
+
+        bit = (ebus ? AUXIO_PCIO_LED : AUXIO_AUX1_LED);
+        __auxio_set_bit(bit, on, ebus);
+}
+
+static void __auxio_sbus_set_lte(int on)
+{
+        __auxio_set_bit(AUXIO_AUX1_LTE, on, 0);
+}
+
+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;
+        }
+}
+
+static struct of_device_id __initdata auxio_match[] = {
+        {
+                .name = "auxio",
+        },
+        {},
+};
+
+MODULE_DEVICE_TABLE(of, auxio_match);
+
+static int __devinit auxio_probe(struct of_device *dev, const struct of_device_id *match)
+{
+        struct device_node *dp = dev->node;
+        unsigned long size;
+
+        if (!strcmp(dp->parent->name, "ebus")) {
+                auxio_devtype = AUXIO_TYPE_EBUS;
+                size = sizeof(u32);
+        } else if (!strcmp(dp->parent->name, "sbus")) {
+                auxio_devtype = AUXIO_TYPE_SBUS;
+                size = 1;
+        } else {
+                printk("auxio: Unknown parent bus type [%s]\n",
+                       dp->parent->name);
+                return -ENODEV;
+        }
+        auxio_register = of_ioremap(&dev->resource[0], 0, size, "auxio");
+        if (!auxio_register)
+                return -ENODEV;
+
+        printk(KERN_INFO "AUXIO: Found device at %s\n",
+               dp->full_name);
+
+        if (auxio_devtype == AUXIO_TYPE_EBUS)
+                auxio_set_led(AUXIO_LED_ON);
+
+        return 0;
+}
+
+static struct of_platform_driver auxio_driver = {
+        .match_table    = auxio_match,
+        .probe          = auxio_probe,
+        .driver         = {
+                .name   = "auxio",
+        },
+};
+
+static int __init auxio_init(void)
+{
+        return of_register_driver(&auxio_driver, &of_platform_bus_type);
+}
+
+/* Must be after subsys_initcall() so that busses are probed.  Must
+ * be before device_initcall() because things like the floppy driver
+ * need to use the AUXIO register.
+ */
+fs_initcall(auxio_init);