1 files changed, 743 insertions, 0 deletions

diff --git a/arch/sparc/kernel/of_device.c b/arch/sparc/kernel/of_device.c
new file mode 100644
index 000000000000..bc956c530376
--- /dev/null
+++ b/arch/sparc/kernel/of_device.c
@@ -0,0 +1,743 @@
+#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;
+}
+
+static int node_match(struct device *dev, void *data)
+{
+	struct of_device *op = to_of_device(dev);
+	struct device_node *dp = data;
+
+	return (op->node == dp);
+}
+
+struct of_device *of_find_device_by_node(struct device_node *dp)
+{
+	struct device *dev = bus_find_device(&of_bus_type, NULL,
+					     dp, node_match);
+
+	if (dev)
+		return to_of_device(dev);
+
+	return NULL;
+}
+EXPORT_SYMBOL(of_find_device_by_node);
+
+#ifdef CONFIG_PCI
+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,
+};
+EXPORT_SYMBOL(ebus_bus_type);
+#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,
+};
+EXPORT_SYMBOL(sbus_bus_type);
+#endif
+
+struct bus_type of_bus_type = {
+       .name	= "of",
+       .match	= of_platform_bus_match,
+       .probe	= of_device_probe,
+       .remove	= of_device_remove,
+       .suspend	= of_device_suspend,
+       .resume	= of_device_resume,
+};
+EXPORT_SYMBOL(of_bus_type);
+
+static inline u64 of_read_addr(u32 *cell, int size)
+{
+	u64 r = 0;
+	while (size--)
+		r = (r << 32) | *(cell++);
+	return r;
+}
+
+static void __init get_cells(struct device_node *dp,
+			     int *addrc, int *sizec)
+{
+	if (addrc)
+		*addrc = of_n_addr_cells(dp);
+	if (sizec)
+		*sizec = of_n_size_cells(dp);
+}
+
+/* Max address size we deal with */
+#define OF_MAX_ADDR_CELLS	4
+
+struct of_bus {
+	const char	*name;
+	const char	*addr_prop_name;
+	int		(*match)(struct device_node *parent);
+	void		(*count_cells)(struct device_node *child,
+				       int *addrc, int *sizec);
+	u64		(*map)(u32 *addr, u32 *range, int na, int ns, int pna);
+	int		(*translate)(u32 *addr, u64 offset, int na);
+	unsigned int	(*get_flags)(u32 *addr);
+};
+
+/*
+ * Default translator (generic bus)
+ */
+
+static void of_bus_default_count_cells(struct device_node *dev,
+				       int *addrc, int *sizec)
+{
+	get_cells(dev, addrc, sizec);
+}
+
+static u64 of_bus_default_map(u32 *addr, u32 *range, int na, int ns, int pna)
+{
+	u64 cp, s, da;
+
+	cp = of_read_addr(range, na);
+	s  = of_read_addr(range + na + pna, ns);
+	da = of_read_addr(addr, na);
+
+	if (da < cp || da >= (cp + s))
+		return OF_BAD_ADDR;
+	return da - cp;
+}
+
+static int of_bus_default_translate(u32 *addr, u64 offset, int na)
+{
+	u64 a = of_read_addr(addr, na);
+	memset(addr, 0, na * 4);
+	a += offset;
+	if (na > 1)
+		addr[na - 2] = a >> 32;
+	addr[na - 1] = a & 0xffffffffu;
+
+	return 0;
+}
+
+static unsigned int of_bus_default_get_flags(u32 *addr)
+{
+	return IORESOURCE_MEM;
+}
+
+
+/*
+ * PCI bus specific translator
+ */
+
+static int of_bus_pci_match(struct device_node *np)
+{
+	return !strcmp(np->type, "pci") || !strcmp(np->type, "pciex");
+}
+
+static void of_bus_pci_count_cells(struct device_node *np,
+				   int *addrc, int *sizec)
+{
+	if (addrc)
+		*addrc = 3;
+	if (sizec)
+		*sizec = 2;
+}
+
+static u64 of_bus_pci_map(u32 *addr, u32 *range, int na, int ns, int pna)
+{
+	u64 cp, s, da;
+
+	/* Check address type match */
+	if ((addr[0] ^ range[0]) & 0x03000000)
+		return OF_BAD_ADDR;
+
+	/* Read address values, skipping high cell */
+	cp = of_read_addr(range + 1, na - 1);
+	s  = of_read_addr(range + na + pna, ns);
+	da = of_read_addr(addr + 1, na - 1);
+
+	if (da < cp || da >= (cp + s))
+		return OF_BAD_ADDR;
+	return da - cp;
+}
+
+static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
+{
+	return of_bus_default_translate(addr + 1, offset, na - 1);
+}
+
+static unsigned int of_bus_pci_get_flags(u32 *addr)
+{
+	unsigned int flags = 0;
+	u32 w = addr[0];
+
+	switch((w >> 24) & 0x03) {
+	case 0x01:
+		flags |= IORESOURCE_IO;
+	case 0x02: /* 32 bits */
+	case 0x03: /* 64 bits */
+		flags |= IORESOURCE_MEM;
+	}
+	if (w & 0x40000000)
+		flags |= IORESOURCE_PREFETCH;
+	return flags;
+}
+
+/*
+ * SBUS bus specific translator
+ */
+
+static int of_bus_sbus_match(struct device_node *np)
+{
+	return !strcmp(np->name, "sbus") ||
+		!strcmp(np->name, "sbi");
+}
+
+static void of_bus_sbus_count_cells(struct device_node *child,
+				   int *addrc, int *sizec)
+{
+	if (addrc)
+		*addrc = 2;
+	if (sizec)
+		*sizec = 1;
+}
+
+static u64 of_bus_sbus_map(u32 *addr, u32 *range, int na, int ns, int pna)
+{
+	return of_bus_default_map(addr, range, na, ns, pna);
+}
+
+static int of_bus_sbus_translate(u32 *addr, u64 offset, int na)
+{
+	return of_bus_default_translate(addr, offset, na);
+}
+
+static unsigned int of_bus_sbus_get_flags(u32 *addr)
+{
+	return IORESOURCE_MEM;
+}
+
+
+/*
+ * Array of bus specific translators
+ */
+
+static struct of_bus of_busses[] = {
+	/* PCI */
+	{
+		.name = "pci",
+		.addr_prop_name = "assigned-addresses",
+		.match = of_bus_pci_match,
+		.count_cells = of_bus_pci_count_cells,
+		.map = of_bus_pci_map,
+		.translate = of_bus_pci_translate,
+		.get_flags = of_bus_pci_get_flags,
+	},
+	/* SBUS */
+	{
+		.name = "sbus",
+		.addr_prop_name = "reg",
+		.match = of_bus_sbus_match,
+		.count_cells = of_bus_sbus_count_cells,
+		.map = of_bus_sbus_map,
+		.translate = of_bus_sbus_translate,
+		.get_flags = of_bus_sbus_get_flags,
+	},
+	/* Default */
+	{
+		.name = "default",
+		.addr_prop_name = "reg",
+		.match = NULL,
+		.count_cells = of_bus_default_count_cells,
+		.map = of_bus_default_map,
+		.translate = of_bus_default_translate,
+		.get_flags = of_bus_default_get_flags,
+	},
+};
+
+static struct of_bus *of_match_bus(struct device_node *np)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
+		if (!of_busses[i].match || of_busses[i].match(np))
+			return &of_busses[i];
+	BUG();
+	return NULL;
+}
+
+static int __init build_one_resource(struct device_node *parent,
+				     struct of_bus *bus,
+				     struct of_bus *pbus,
+				     u32 *addr,
+				     int na, int ns, int pna)
+{
+	u32 *ranges;
+	unsigned int rlen;
+	int rone;
+	u64 offset = OF_BAD_ADDR;
+
+	ranges = of_get_property(parent, "ranges", &rlen);
+	if (ranges == NULL || rlen == 0) {
+		offset = of_read_addr(addr, na);
+		memset(addr, 0, pna * 4);
+		goto finish;
+	}
+
+	/* Now walk through the ranges */
+	rlen /= 4;
+	rone = na + pna + ns;
+	for (; rlen >= rone; rlen -= rone, ranges += rone) {
+		offset = bus->map(addr, ranges, na, ns, pna);
+		if (offset != OF_BAD_ADDR)
+			break;
+	}
+	if (offset == OF_BAD_ADDR)
+		return 1;
+
+	memcpy(addr, ranges + na, 4 * pna);
+
+finish:
+	/* Translate it into parent bus space */
+	return pbus->translate(addr, offset, pna);
+}
+
+static void __init build_device_resources(struct of_device *op,
+					  struct device *parent)
+{
+	struct of_device *p_op;
+	struct of_bus *bus;
+	int na, ns;
+	int index, num_reg;
+	void *preg;
+
+	if (!parent)
+		return;
+
+	p_op = to_of_device(parent);
+	bus = of_match_bus(p_op->node);
+	bus->count_cells(op->node, &na, &ns);
+
+	preg = of_get_property(op->node, bus->addr_prop_name, &num_reg);
+	if (!preg || num_reg == 0)
+		return;
+
+	/* Convert to num-cells.  */
+	num_reg /= 4;
+
+	/* Conver to num-entries.  */
+	num_reg /= na + ns;
+
+	for (index = 0; index < num_reg; index++) {
+		struct resource *r = &op->resource[index];
+		u32 addr[OF_MAX_ADDR_CELLS];
+		u32 *reg = (preg + (index * ((na + ns) * 4)));
+		struct device_node *dp = op->node;
+		struct device_node *pp = p_op->node;
+		struct of_bus *pbus;
+		u64 size, result = OF_BAD_ADDR;
+		unsigned long flags;
+		int dna, dns;
+		int pna, pns;
+
+		size = of_read_addr(reg + na, ns);
+		flags = bus->get_flags(reg);
+
+		memcpy(addr, reg, na * 4);
+
+		/* If the immediate parent has no ranges property to apply,
+		 * just use a 1<->1 mapping.
+		 */
+		if (of_find_property(pp, "ranges", NULL) == NULL) {
+			result = of_read_addr(addr, na);
+			goto build_res;
+		}
+
+		dna = na;
+		dns = ns;
+
+		while (1) {
+			dp = pp;
+			pp = dp->parent;
+			if (!pp) {
+				result = of_read_addr(addr, dna);
+				break;
+			}
+
+			pbus = of_match_bus(pp);
+			pbus->count_cells(dp, &pna, &pns);
+
+			if (build_one_resource(dp, bus, pbus, addr, dna, dns, pna))
+				break;
+
+			dna = pna;
+			dns = pns;
+			bus = pbus;
+		}
+
+	build_res:
+		memset(r, 0, sizeof(*r));
+		if (result != OF_BAD_ADDR) {
+			r->start = result & 0xffffffff;
+			r->end = result + size - 1;
+			r->flags = flags | ((result >> 32ULL) & 0xffUL);
+		} else {
+			r->start = ~0UL;
+			r->end = ~0UL;
+		}
+		r->name = op->node->name;
+	}
+}
+
+static struct of_device * __init scan_one_device(struct device_node *dp,
+						 struct device *parent)
+{
+	struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
+	struct linux_prom_irqs *intr;
+	int len, i;
+
+	if (!op)
+		return NULL;
+
+	op->node = dp;
+
+	op->clock_freq = of_getintprop_default(dp, "clock-frequency",
+					       (25*1000*1000));
+	op->portid = of_getintprop_default(dp, "upa-portid", -1);
+	if (op->portid == -1)
+		op->portid = of_getintprop_default(dp, "portid", -1);
+
+	intr = of_get_property(dp, "intr", &len);
+	if (intr) {
+		op->num_irqs = len / sizeof(struct linux_prom_irqs);
+		for (i = 0; i < op->num_irqs; i++)
+			op->irqs[i] = intr[i].pri;
+	} else {
+		unsigned int *irq = of_get_property(dp, "interrupts", &len);
+
+		if (irq) {
+			op->num_irqs = len / sizeof(unsigned int);
+			for (i = 0; i < op->num_irqs; i++)
+				op->irqs[i] = irq[i];
+		} else {
+			op->num_irqs = 0;
+		}
+	}
+	if (sparc_cpu_model == sun4d) {
+		static int pil_to_sbus[] = {
+			0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,
+		};
+		struct device_node *busp = dp->parent;
+		struct linux_prom_registers *regs;
+		int board = of_getintprop_default(busp, "board#", 0);
+		int slot;
+
+		regs = of_get_property(dp, "reg", NULL);
+		slot = regs->which_io;
+
+		for (i = 0; i < op->num_irqs; i++) {
+			int this_irq = op->irqs[i];
+			int sbusl = pil_to_sbus[this_irq];
+
+			if (sbusl)
+				this_irq = (((board + 1) << 5) +
+					    (sbusl << 2) +
+					    slot);
+
+			op->irqs[i] = this_irq;
+		}
+	}
+
+	build_device_resources(op, parent);
+
+	op->dev.parent = parent;
+	op->dev.bus = &of_bus_type;
+	if (!parent)
+		strcpy(op->dev.bus_id, "root");
+	else
+		strcpy(op->dev.bus_id, dp->path_component_name);
+
+	if (of_device_register(op)) {
+		printk("%s: Could not register of device.\n",
+		       dp->full_name);
+		kfree(op);
+		op = NULL;
+	}
+
+	return op;
+}
+
+static void __init scan_tree(struct device_node *dp, struct device *parent)
+{
+	while (dp) {
+		struct of_device *op = scan_one_device(dp, parent);
+
+		if (op)
+			scan_tree(dp->child, &op->dev);
+
+		dp = dp->sibling;
+	}
+}
+
+static void __init scan_of_devices(void)
+{
+	struct device_node *root = of_find_node_by_path("/");
+	struct of_device *parent;
+
+	parent = scan_one_device(root, NULL);
+	if (!parent)
+		return;
+
+	scan_tree(root->child, &parent->dev);
+}
+
+static int __init of_bus_driver_init(void)
+{
+	int err;
+
+	err = bus_register(&of_bus_type);
+#ifdef CONFIG_PCI
+	if (!err)
+		err = bus_register(&ebus_bus_type);
+#endif
+#ifdef CONFIG_SBUS
+	if (!err)
+		err = bus_register(&sbus_bus_type);
+#endif
+
+	if (!err)
+		scan_of_devices();
+
+	return err;
+}
+
+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);