[SPARC64]: Add of_device layer and make ebus/isa use it.

Sparcspkr and power drivers are converted, to make sure it works.
Eventually the SBUS device layer will use this as a sub-class.

I really cannot cut loose on that bit until sparc32 is given the
same infrastructure.

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

5 files changed, 387 insertions, 61 deletions

diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile
index 7f00189ed294..86c9fe3f3e4a 100644
--- a/arch/sparc64/kernel/Makefile
+++ b/arch/sparc64/kernel/Makefile
@@ -12,7 +12,7 @@ obj-y		:= process.o setup.o cpu.o idprom.o \
                    irq.o ptrace.o time.o sys_sparc.o signal.o \
                    unaligned.o central.o pci.o starfire.o semaphore.o \
                    power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
-                   visemul.o prom.o
+                   visemul.o prom.o of_device.o
 
 obj-$(CONFIG_PCI)        += ebus.o isa.o pci_common.o pci_iommu.o \
                             pci_psycho.o pci_sabre.o pci_schizo.o \
diff --git a/arch/sparc64/kernel/ebus.c b/arch/sparc64/kernel/ebus.c
index 33d79e10c653..b390a2f3a15e 100644
--- a/arch/sparc64/kernel/ebus.c
+++ b/arch/sparc64/kernel/ebus.c
@@ -475,6 +475,16 @@ probe_interrupts:
                 }
         }
 
+        dev->ofdev.node = dp;
+        dev->ofdev.dev.parent = &dev->bus->ofdev.dev;
+        dev->ofdev.dev.bus = &ebus_bus_type;
+        strcpy(dev->ofdev.dev.bus_id, dp->path_component_name);
+
+        /* Register with core */
+        if (of_device_register(&dev->ofdev) != 0)
+                printk(KERN_DEBUG "ebus: device registration error for %s!\n",
+                       dev->ofdev.dev.bus_id);
+
         dp = dp->child;
         if (dp) {
                 printk(" ->");
@@ -570,6 +580,17 @@ void __init ebus_init(void)
                 ebus->self = pdev;
                 ebus->parent = pbm = cookie->pbm;
 
+                ebus->ofdev.node = dp;
+                ebus->ofdev.dev.parent = &pdev->dev;
+                ebus->ofdev.dev.bus = &ebus_bus_type;
+                strcpy(ebus->ofdev.dev.bus_id, dp->path_component_name);
+
+                /* Register with core */
+                if (of_device_register(&ebus->ofdev) != 0)
+                        printk(KERN_DEBUG "ebus: device registration error for %s!\n",
+                               ebus->ofdev.dev.bus_id);
+
+
                 child = dp->child;
                 if (!child)
                         goto next_ebus;
diff --git a/arch/sparc64/kernel/isa.c b/arch/sparc64/kernel/isa.c
index 2693f2de549c..6f16dee280a8 100644
--- a/arch/sparc64/kernel/isa.c
+++ b/arch/sparc64/kernel/isa.c
@@ -195,12 +195,25 @@ static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
 
                 isa_dev = kmalloc(sizeof(*isa_dev), GFP_KERNEL);
                 if (!isa_dev) {
-                        fatal_err("cannot allocate isa_dev");
-                        prom_halt();
+                        printk(KERN_DEBUG "ISA: cannot allocate isa_dev");
+                        return;
                 }
 
                 memset(isa_dev, 0, sizeof(*isa_dev));
 
+                isa_dev->ofdev.node = dp;
+                isa_dev->ofdev.dev.parent = &isa_br->ofdev.dev;
+                isa_dev->ofdev.dev.bus = &isa_bus_type;
+                strcpy(isa_dev->ofdev.dev.bus_id, dp->path_component_name);
+
+                /* Register with core */
+                if (of_device_register(&isa_dev->ofdev) != 0) {
+                        printk(KERN_DEBUG "isa: device registration error for %s!\n",
+                               isa_dev->ofdev.dev.bus_id);
+                        kfree(isa_dev);
+                        goto next_sibling;
+                }
+
                 /* Link it in. */
                 isa_dev->next = NULL;
                 if (isa_br->devices == NULL) {
@@ -226,6 +239,7 @@ static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
 
                 printk("]");
 
+        next_sibling:
                 dp = dp->sibling;
         }
 }
@@ -244,6 +258,7 @@ void __init isa_init(void)
                 struct pcidev_cookie *pdev_cookie;
                 struct pci_pbm_info *pbm;
                 struct sparc_isa_bridge *isa_br;
+                struct device_node *dp;
 
                 pdev_cookie = pdev->sysdata;
                 if (!pdev_cookie) {
@@ -252,15 +267,29 @@ void __init isa_init(void)
                         continue;
                 }
                 pbm = pdev_cookie->pbm;
+                dp = pdev_cookie->prom_node;
 
                 isa_br = kmalloc(sizeof(*isa_br), GFP_KERNEL);
                 if (!isa_br) {
-                        fatal_err("cannot allocate sparc_isa_bridge");
-                        prom_halt();
+                        printk(KERN_DEBUG "isa: cannot allocate sparc_isa_bridge");
+                        return;
                 }
 
                 memset(isa_br, 0, sizeof(*isa_br));
 
+                isa_br->ofdev.node = dp;
+                isa_br->ofdev.dev.parent = &pdev->dev;
+                isa_br->ofdev.dev.bus = &isa_bus_type;
+                strcpy(isa_br->ofdev.dev.bus_id, dp->path_component_name);
+
+                /* Register with core */
+                if (of_device_register(&isa_br->ofdev) != 0) {
+                        printk(KERN_DEBUG "isa: device registration error for %s!\n",
+                               isa_br->ofdev.dev.bus_id);
+                        kfree(isa_br);
+                        return;
+                }
+
                 /* Link it in. */
                 isa_br->next = isa_chain;
                 isa_chain = isa_br;
diff --git a/arch/sparc64/kernel/of_device.c b/arch/sparc64/kernel/of_device.c
new file mode 100644
index 000000000000..566aa343aa62
--- /dev/null
+++ b/arch/sparc64/kernel/of_device.c
@@ -0,0 +1,279 @@
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+
+#include <asm/errno.h>
+#include <asm/of_device.h>
+
+/**
+ * of_match_device - Tell if an of_device structure has a matching
+ * of_match structure
+ * @ids: array of of device match structures to search in
+ * @dev: the of device structure to match against
+ *
+ * Used by a driver to check whether an of_device present in the
+ * system is in its list of supported devices.
+ */
+const struct of_device_id *of_match_device(const struct of_device_id *matches,
+                                        const struct of_device *dev)
+{
+        if (!dev->node)
+                return NULL;
+        while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
+                int match = 1;
+                if (matches->name[0])
+                        match &= dev->node->name
+                                && !strcmp(matches->name, dev->node->name);
+                if (matches->type[0])
+                        match &= dev->node->type
+                                && !strcmp(matches->type, dev->node->type);
+                if (matches->compatible[0])
+                        match &= of_device_is_compatible(dev->node,
+                                                         matches->compatible);
+                if (match)
+                        return matches;
+                matches++;
+        }
+        return NULL;
+}
+
+static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
+{
+        struct of_device * of_dev = to_of_device(dev);
+        struct of_platform_driver * of_drv = to_of_platform_driver(drv);
+        const struct of_device_id * matches = of_drv->match_table;
+
+        if (!matches)
+                return 0;
+
+        return of_match_device(matches, of_dev) != NULL;
+}
+
+struct of_device *of_dev_get(struct of_device *dev)
+{
+        struct device *tmp;
+
+        if (!dev)
+                return NULL;
+        tmp = get_device(&dev->dev);
+        if (tmp)
+                return to_of_device(tmp);
+        else
+                return NULL;
+}
+
+void of_dev_put(struct of_device *dev)
+{
+        if (dev)
+                put_device(&dev->dev);
+}
+
+
+static int of_device_probe(struct device *dev)
+{
+        int error = -ENODEV;
+        struct of_platform_driver *drv;
+        struct of_device *of_dev;
+        const struct of_device_id *match;
+
+        drv = to_of_platform_driver(dev->driver);
+        of_dev = to_of_device(dev);
+
+        if (!drv->probe)
+                return error;
+
+        of_dev_get(of_dev);
+
+        match = of_match_device(drv->match_table, of_dev);
+        if (match)
+                error = drv->probe(of_dev, match);
+        if (error)
+                of_dev_put(of_dev);
+
+        return error;
+}
+
+static int of_device_remove(struct device *dev)
+{
+        struct of_device * of_dev = to_of_device(dev);
+        struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
+
+        if (dev->driver && drv->remove)
+                drv->remove(of_dev);
+        return 0;
+}
+
+static int of_device_suspend(struct device *dev, pm_message_t state)
+{
+        struct of_device * of_dev = to_of_device(dev);
+        struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
+        int error = 0;
+
+        if (dev->driver && drv->suspend)
+                error = drv->suspend(of_dev, state);
+        return error;
+}
+
+static int of_device_resume(struct device * dev)
+{
+        struct of_device * of_dev = to_of_device(dev);
+        struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
+        int error = 0;
+
+        if (dev->driver && drv->resume)
+                error = drv->resume(of_dev);
+        return error;
+}
+
+#ifdef CONFIG_PCI
+struct bus_type isa_bus_type = {
+       .name    = "isa",
+       .match   = of_platform_bus_match,
+       .probe   = of_device_probe,
+       .remove  = of_device_remove,
+       .suspend = of_device_suspend,
+       .resume  = of_device_resume,
+};
+
+struct bus_type ebus_bus_type = {
+       .name    = "ebus",
+       .match   = of_platform_bus_match,
+       .probe   = of_device_probe,
+       .remove  = of_device_remove,
+       .suspend = of_device_suspend,
+       .resume  = of_device_resume,
+};
+#endif
+
+#ifdef CONFIG_SBUS
+struct bus_type sbus_bus_type = {
+       .name    = "sbus",
+       .match   = of_platform_bus_match,
+       .probe   = of_device_probe,
+       .remove  = of_device_remove,
+       .suspend = of_device_suspend,
+       .resume  = of_device_resume,
+};
+#endif
+
+static int __init of_bus_driver_init(void)
+{
+        int err = 0;
+
+#ifdef CONFIG_PCI
+        if (!err)
+                err = bus_register(&isa_bus_type);
+        if (!err)
+                err = bus_register(&ebus_bus_type);
+#endif
+#ifdef CONFIG_SBUS
+        if (!err)
+                err = bus_register(&sbus_bus_type);
+#endif
+        return 0;
+}
+
+postcore_initcall(of_bus_driver_init);
+
+int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus)
+{
+        /* initialize common driver fields */
+        drv->driver.name = drv->name;
+        drv->driver.bus = bus;
+
+        /* register with core */
+        return driver_register(&drv->driver);
+}
+
+void of_unregister_driver(struct of_platform_driver *drv)
+{
+        driver_unregister(&drv->driver);
+}
+
+
+static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct of_device *ofdev;
+
+        ofdev = to_of_device(dev);
+        return sprintf(buf, "%s", ofdev->node->full_name);
+}
+
+static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL);
+
+/**
+ * of_release_dev - free an of device structure when all users of it are finished.
+ * @dev: device that's been disconnected
+ *
+ * Will be called only by the device core when all users of this of device are
+ * done.
+ */
+void of_release_dev(struct device *dev)
+{
+        struct of_device *ofdev;
+
+        ofdev = to_of_device(dev);
+
+        kfree(ofdev);
+}
+
+int of_device_register(struct of_device *ofdev)
+{
+        int rc;
+
+        BUG_ON(ofdev->node == NULL);
+
+        rc = device_register(&ofdev->dev);
+        if (rc)
+                return rc;
+
+        device_create_file(&ofdev->dev, &dev_attr_devspec);
+
+        return 0;
+}
+
+void of_device_unregister(struct of_device *ofdev)
+{
+        device_remove_file(&ofdev->dev, &dev_attr_devspec);
+        device_unregister(&ofdev->dev);
+}
+
+struct of_device* of_platform_device_create(struct device_node *np,
+                                            const char *bus_id,
+                                            struct device *parent,
+                                            struct bus_type *bus)
+{
+        struct of_device *dev;
+
+        dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+        if (!dev)
+                return NULL;
+        memset(dev, 0, sizeof(*dev));
+
+        dev->dev.parent = parent;
+        dev->dev.bus = bus;
+        dev->dev.release = of_release_dev;
+
+        strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
+
+        if (of_device_register(dev) != 0) {
+                kfree(dev);
+                return NULL;
+        }
+
+        return dev;
+}
+
+EXPORT_SYMBOL(of_match_device);
+EXPORT_SYMBOL(of_register_driver);
+EXPORT_SYMBOL(of_unregister_driver);
+EXPORT_SYMBOL(of_device_register);
+EXPORT_SYMBOL(of_device_unregister);
+EXPORT_SYMBOL(of_dev_get);
+EXPORT_SYMBOL(of_dev_put);
+EXPORT_SYMBOL(of_platform_device_create);
+EXPORT_SYMBOL(of_release_dev);
diff --git a/arch/sparc64/kernel/power.c b/arch/sparc64/kernel/power.c
index 75159a7843f1..9496c7734014 100644
--- a/arch/sparc64/kernel/power.c
+++ b/arch/sparc64/kernel/power.c
@@ -115,66 +115,15 @@ static int __init has_button_interrupt(unsigned int irq, struct device_node *dp)
         return 1;
 }
 
-static int __init power_probe_ebus(struct resource **resp, unsigned int *irq_p, struct device_node **prom_node_p)
+static void __devinit power_probe_common(struct of_device *dev, struct resource *res, unsigned int irq)
 {
-        struct linux_ebus *ebus;
-        struct linux_ebus_device *edev;
-
-        for_each_ebus(ebus) {
-                for_each_ebusdev(edev, ebus) {
-                        if (!strcmp(edev->prom_node->name, "power")) {
-                                *resp = &edev->resource[0];
-                                *irq_p = edev->irqs[0];
-                                *prom_node_p = edev->prom_node;
-                                return 0;
-                        }
-                }
-        }
-        return -ENODEV;
-}
-
-static int __init power_probe_isa(struct resource **resp, unsigned int *irq_p, struct device_node **prom_node_p)
-{
-        struct sparc_isa_bridge *isa_bus;
-        struct sparc_isa_device *isa_dev;
-
-        for_each_isa(isa_bus) {
-                for_each_isadev(isa_dev, isa_bus) {
-                        if (!strcmp(isa_dev->prom_node->name, "power")) {
-                                *resp = &isa_dev->resource;
-                                *irq_p = isa_dev->irq;
-                                *prom_node_p = isa_dev->prom_node;
-                                return 0;
-                        }
-                }
-        }
-        return -ENODEV;
-}
-
-void __init power_init(void)
-{
-        struct resource *res = NULL;
-        unsigned int irq;
-        struct device_node *dp;
-        static int invoked;
-
-        if (invoked)
-                return;
-        invoked = 1;
-
-        if (!power_probe_ebus(&res, &irq, &dp))
-                goto found;
-
-        if (!power_probe_isa(&res, &irq, &dp))
-                goto found;
-
-        return;
-
-found:
         power_reg = ioremap(res->start, 0x4);
+
         printk("power: Control reg at %p ... ", power_reg);
+
         poweroff_method = machine_halt;  /* able to use the standard halt */
-        if (has_button_interrupt(irq, dp)) {
+
+        if (has_button_interrupt(irq, dev->node)) {
                 if (kernel_thread(powerd, NULL, CLONE_FS) < 0) {
                         printk("Failed to start power daemon.\n");
                         return;
@@ -188,4 +137,52 @@ found:
                 printk("not using powerd.\n");
         }
 }
+
+static struct of_device_id power_match[] = {
+        {
+                .name = "power",
+        },
+        {},
+};
+
+static int __devinit ebus_power_probe(struct of_device *dev, const struct of_device_id *match)
+{
+        struct linux_ebus_device *edev = to_ebus_device(&dev->dev);
+        struct resource *res = &edev->resource[0];
+        unsigned int irq = edev->irqs[0];
+
+        power_probe_common(dev, res,irq);
+
+        return 0;
+}
+
+static struct of_platform_driver ebus_power_driver = {
+        .name           = "power",
+        .match_table    = power_match,
+        .probe          = ebus_power_probe,
+};
+
+static int __devinit isa_power_probe(struct of_device *dev, const struct of_device_id *match)
+{
+        struct sparc_isa_device *idev = to_isa_device(&dev->dev);
+        struct resource *res = &idev->resource;
+        unsigned int irq = idev->irq;
+
+        power_probe_common(dev, res,irq);
+
+        return 0;
+}
+
+static struct of_platform_driver isa_power_driver = {
+        .name           = "power",
+        .match_table    = power_match,
+        .probe          = isa_power_probe,
+};
+
+void __init power_init(void)
+{
+        of_register_driver(&ebus_power_driver, &ebus_bus_type);
+        of_register_driver(&isa_power_driver, &isa_bus_type);
+        return;
+}
 #endif /* CONFIG_PCI */