[deliverable/linux.git] / arch / sparc64 / kernel / of_device.c

#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,
};
EXPORT_SYMBOL(isa_bus_type);

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;
}

/*
 * ISA bus specific translator
 */

static int of_bus_isa_match(struct device_node *np)
{
	return !strcmp(np->name, "isa");
}

static void of_bus_isa_count_cells(struct device_node *child,
				   int *addrc, int *sizec)
{
	if (addrc)
		*addrc = 2;
	if (sizec)
		*sizec = 1;
}

static u64 of_bus_isa_map(u32 *addr, u32 *range, int na, int ns, int pna)
{
	u64 cp, s, da;

	/* Check address type match */
	if ((addr[0] ^ range[0]) & 0x00000001)
		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_isa_translate(u32 *addr, u64 offset, int na)
{
	return of_bus_default_translate(addr + 1, offset, na - 1);
}

static unsigned int of_bus_isa_get_flags(u32 *addr)
{
	unsigned int flags = 0;
	u32 w = addr[0];

	if (w & 1)
		flags |= IORESOURCE_IO;
	else
		flags |= IORESOURCE_MEM;
	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,
	},
	/* ISA */
	{
		.name = "isa",
		.addr_prop_name = "reg",
		.match = of_bus_isa_match,
		.count_cells = of_bus_isa_count_cells,
		.map = of_bus_isa_map,
		.translate = of_bus_isa_translate,
		.get_flags = of_bus_isa_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.  Unless it is the 'dma' child
		 * of an isa bus, which must be passed up towards the root.
		 *
		 * Also, don't try to translate PMU bus device registers.
		 */
		if ((of_find_property(pp, "ranges", NULL) == NULL &&
		     strcmp(pp->name, "dma") != 0) ||
		    !strcmp(pp->name, "pmu")) {
			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;
			r->end = result + size - 1;
			r->flags = flags;
		} 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);
	unsigned int *irq;
	int len;

	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);

	irq = of_get_property(dp, "interrupts", &len);
	if (irq)
		op->irq = *irq;
	else
		op->irq = 0xffffffff;

	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(&isa_bus_type);
	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);
Commit	Line	Data
a2bd4fd1 DM	1	#include <linux/config.h>
	2	#include <linux/string.h>
	3	#include <linux/kernel.h>
	4	#include <linux/init.h>
	5	#include <linux/module.h>
	6	#include <linux/mod_devicetable.h>
	7	#include <linux/slab.h>
	8
	9	#include <asm/errno.h>
	10	#include <asm/of_device.h>
	11
	12	/**
	13	* of_match_device - Tell if an of_device structure has a matching
	14	* of_match structure
	15	* @ids: array of of device match structures to search in
	16	* @dev: the of device structure to match against
	17	*
	18	* Used by a driver to check whether an of_device present in the
	19	* system is in its list of supported devices.
	20	*/
	21	const struct of_device_id of_match_device(const struct of_device_id matches,
	22	const struct of_device *dev)
	23	{
	24	if (!dev->node)
	25	return NULL;
	26	while (matches->name[0] \|\| matches->type[0] \|\| matches->compatible[0]) {
	27	int match = 1;
	28	if (matches->name[0])
	29	match &= dev->node->name
	30	&& !strcmp(matches->name, dev->node->name);
	31	if (matches->type[0])
	32	match &= dev->node->type
	33	&& !strcmp(matches->type, dev->node->type);
	34	if (matches->compatible[0])
	35	match &= of_device_is_compatible(dev->node,
	36	matches->compatible);
	37	if (match)
	38	return matches;
	39	matches++;
	40	}
	41	return NULL;
	42	}
	43
	44	static int of_platform_bus_match(struct device dev, struct device_driver drv)
	45	{
	46	struct of_device * of_dev = to_of_device(dev);
	47	struct of_platform_driver * of_drv = to_of_platform_driver(drv);
	48	const struct of_device_id * matches = of_drv->match_table;
	49
	50	if (!matches)
	51	return 0;
	52
	53	return of_match_device(matches, of_dev) != NULL;
	54	}
	55
	56	struct of_device of_dev_get(struct of_device dev)
	57	{
	58	struct device *tmp;
	59
	60	if (!dev)
	61	return NULL;
	62	tmp = get_device(&dev->dev);
	63	if (tmp)
	64	return to_of_device(tmp);
65	else
66	return NULL;
67	}
68
69	void of_dev_put(struct of_device *dev)
70	{
71	if (dev)
72	put_device(&dev->dev);
73	}
74
75
76	static int of_device_probe(struct device *dev)
77	{
78	int error = -ENODEV;
79	struct of_platform_driver *drv;
80	struct of_device *of_dev;
81	const struct of_device_id *match;
82
83	drv = to_of_platform_driver(dev->driver);
84	of_dev = to_of_device(dev);
85
86	if (!drv->probe)
87	return error;
88
89	of_dev_get(of_dev);
90
91	match = of_match_device(drv->match_table, of_dev);
92	if (match)
93	error = drv->probe(of_dev, match);
94	if (error)
95	of_dev_put(of_dev);
96
97	return error;
98	}
99
100	static int of_device_remove(struct device *dev)
101	{
102	struct of_device * of_dev = to_of_device(dev);
103	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
104
105	if (dev->driver && drv->remove)
106	drv->remove(of_dev);
107	return 0;
108	}
109
110	static int of_device_suspend(struct device *dev, pm_message_t state)
111	{
112	struct of_device * of_dev = to_of_device(dev);
113	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
114	int error = 0;
115
116	if (dev->driver && drv->suspend)
117	error = drv->suspend(of_dev, state);
118	return error;
119	}
120
121	static int of_device_resume(struct device * dev)
122	{
123	struct of_device * of_dev = to_of_device(dev);
124	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
125	int error = 0;
126
127	if (dev->driver && drv->resume)
128	error = drv->resume(of_dev);
129	return error;
130	}
131
132	#ifdef CONFIG_PCI
133	struct bus_type isa_bus_type = {
134	.name = "isa",
135	.match = of_platform_bus_match,
136	.probe = of_device_probe,
137	.remove = of_device_remove,
138	.suspend = of_device_suspend,
139	.resume = of_device_resume,
140	};
69853918	141	EXPORT_SYMBOL(isa_bus_type);
a2bd4fd1 DM	142
	143	struct bus_type ebus_bus_type = {
	144	.name = "ebus",
	145	.match = of_platform_bus_match,
	146	.probe = of_device_probe,
	147	.remove = of_device_remove,
	148	.suspend = of_device_suspend,
	149	.resume = of_device_resume,
	150	};
69853918	151	EXPORT_SYMBOL(ebus_bus_type);
a2bd4fd1 DM	152	#endif
	153
	154	#ifdef CONFIG_SBUS
	155	struct bus_type sbus_bus_type = {
	156	.name = "sbus",
	157	.match = of_platform_bus_match,
	158	.probe = of_device_probe,
	159	.remove = of_device_remove,
	160	.suspend = of_device_suspend,
	161	.resume = of_device_resume,
	162	};
69853918	163	EXPORT_SYMBOL(sbus_bus_type);
a2bd4fd1 DM	164	#endif
a2bd4fd1 DM	165
cf44bbc2 DM	166	struct bus_type of_bus_type = {
	167	.name = "of",
	168	.match = of_platform_bus_match,
	169	.probe = of_device_probe,
	170	.remove = of_device_remove,
	171	.suspend = of_device_suspend,
	172	.resume = of_device_resume,
	173	};
	174	EXPORT_SYMBOL(of_bus_type);
	175
	176	static inline u64 of_read_addr(u32 *cell, int size)
	177	{
	178	u64 r = 0;
	179	while (size--)
	180	r = (r << 32) \| *(cell++);
	181	return r;
	182	}
	183
	184	static void __init get_cells(struct device_node *dp,
	185	int addrc, int sizec)
	186	{
	187	if (addrc)
	188	*addrc = of_n_addr_cells(dp);
	189	if (sizec)
	190	*sizec = of_n_size_cells(dp);
	191	}
	192
	193	/* Max address size we deal with */
	194	#define OF_MAX_ADDR_CELLS 4
	195
	196	struct of_bus {
	197	const char *name;
	198	const char *addr_prop_name;
	199	int (match)(struct device_node parent);
	200	void (count_cells)(struct device_node child,
	201	int addrc, int sizec);
	202	u64 (map)(u32 addr, u32 *range, int na, int ns, int pna);
	203	int (translate)(u32 addr, u64 offset, int na);
	204	unsigned int (get_flags)(u32 addr);
	205	};
	206
	207	/*
	208	* Default translator (generic bus)
	209	*/
	210
	211	static void of_bus_default_count_cells(struct device_node *dev,
	212	int addrc, int sizec)
	213	{
	214	get_cells(dev, addrc, sizec);
	215	}
	216
	217	static u64 of_bus_default_map(u32 addr, u32 range, int na, int ns, int pna)
	218	{
	219	u64 cp, s, da;
	220
	221	cp = of_read_addr(range, na);
	222	s = of_read_addr(range + na + pna, ns);
	223	da = of_read_addr(addr, na);
	224
	225	if (da < cp \|\| da >= (cp + s))
	226	return OF_BAD_ADDR;
	227	return da - cp;
	228	}
	229
230	static int of_bus_default_translate(u32 *addr, u64 offset, int na)
231	{
232	u64 a = of_read_addr(addr, na);
233	memset(addr, 0, na * 4);
234	a += offset;
235	if (na > 1)
236	addr[na - 2] = a >> 32;
237	addr[na - 1] = a & 0xffffffffu;
238
239	return 0;
240	}
241
242	static unsigned int of_bus_default_get_flags(u32 *addr)
243	{
244	return IORESOURCE_MEM;
245	}
246
247
248	/*
249	* PCI bus specific translator
250	*/
251
252	static int of_bus_pci_match(struct device_node *np)
253	{
254	return !strcmp(np->type, "pci") \|\| !strcmp(np->type, "pciex");
255	}
256
257	static void of_bus_pci_count_cells(struct device_node *np,
258	int addrc, int sizec)
259	{
260	if (addrc)
261	*addrc = 3;
262	if (sizec)
263	*sizec = 2;
264	}
265
266	static u64 of_bus_pci_map(u32 addr, u32 range, int na, int ns, int pna)
267	{
268	u64 cp, s, da;
269
270	/* Check address type match */
271	if ((addr[0] ^ range[0]) & 0x03000000)
272	return OF_BAD_ADDR;
273
274	/* Read address values, skipping high cell */
275	cp = of_read_addr(range + 1, na - 1);
276	s = of_read_addr(range + na + pna, ns);
277	da = of_read_addr(addr + 1, na - 1);
278
279	if (da < cp \|\| da >= (cp + s))
280	return OF_BAD_ADDR;
281	return da - cp;
282	}
283
284	static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
285	{
286	return of_bus_default_translate(addr + 1, offset, na - 1);
287	}
288
289	static unsigned int of_bus_pci_get_flags(u32 *addr)
290	{
291	unsigned int flags = 0;
292	u32 w = addr[0];
293
294	switch((w >> 24) & 0x03) {
295	case 0x01:
296	flags \|= IORESOURCE_IO;
297	case 0x02: /* 32 bits */
298	case 0x03: /* 64 bits */
299	flags \|= IORESOURCE_MEM;
300	}
301	if (w & 0x40000000)
302	flags \|= IORESOURCE_PREFETCH;
303	return flags;
304	}
305
306	/*
307	* ISA bus specific translator
308	*/
309
310	static int of_bus_isa_match(struct device_node *np)
311	{
312	return !strcmp(np->name, "isa");
313	}
314
315	static void of_bus_isa_count_cells(struct device_node *child,
316	int addrc, int sizec)
317	{
318	if (addrc)
319	*addrc = 2;
320	if (sizec)
321	*sizec = 1;
322	}
323
324	static u64 of_bus_isa_map(u32 addr, u32 range, int na, int ns, int pna)
325	{
326	u64 cp, s, da;
327
328	/* Check address type match */
329	if ((addr[0] ^ range[0]) & 0x00000001)
330	return OF_BAD_ADDR;
331
332	/* Read address values, skipping high cell */
333	cp = of_read_addr(range + 1, na - 1);
334	s = of_read_addr(range + na + pna, ns);
335	da = of_read_addr(addr + 1, na - 1);
336
337	if (da < cp \|\| da >= (cp + s))
338	return OF_BAD_ADDR;
339	return da - cp;
340	}
341
342	static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
343	{
344	return of_bus_default_translate(addr + 1, offset, na - 1);
345	}
346
347	static unsigned int of_bus_isa_get_flags(u32 *addr)
348	{
349	unsigned int flags = 0;
350	u32 w = addr[0];
351
352	if (w & 1)
353	flags \|= IORESOURCE_IO;
354	else
355	flags \|= IORESOURCE_MEM;
356	return flags;
357	}
358
359	/*
360	* SBUS bus specific translator
361	*/
362
363	static int of_bus_sbus_match(struct device_node *np)
364	{
365	return !strcmp(np->name, "sbus") \|\|
366	!strcmp(np->name, "sbi");
367	}
368
369	static void of_bus_sbus_count_cells(struct device_node *child,
370	int addrc, int sizec)
371	{
372	if (addrc)
373	*addrc = 2;
374	if (sizec)
375	*sizec = 1;
376	}
377
378	static u64 of_bus_sbus_map(u32 addr, u32 range, int na, int ns, int pna)
379	{
380	return of_bus_default_map(addr, range, na, ns, pna);
381	}
382
383	static int of_bus_sbus_translate(u32 *addr, u64 offset, int na)
384	{
385	return of_bus_default_translate(addr, offset, na);
386	}
387
388	static unsigned int of_bus_sbus_get_flags(u32 *addr)
389	{
390	return IORESOURCE_MEM;
391	}
392
393
394	/*
395	* Array of bus specific translators
396	*/
397
398	static struct of_bus of_busses[] = {
399	/* PCI */
400	{
401	.name = "pci",
402	.addr_prop_name = "assigned-addresses",
403	.match = of_bus_pci_match,
404	.count_cells = of_bus_pci_count_cells,
405	.map = of_bus_pci_map,
406	.translate = of_bus_pci_translate,
407	.get_flags = of_bus_pci_get_flags,
408	},
409	/* ISA */
410	{
411	.name = "isa",
412	.addr_prop_name = "reg",
413	.match = of_bus_isa_match,
414	.count_cells = of_bus_isa_count_cells,
415	.map = of_bus_isa_map,
416	.translate = of_bus_isa_translate,
417	.get_flags = of_bus_isa_get_flags,
418	},
419	/* SBUS */
420	{
421	.name = "sbus",
422	.addr_prop_name = "reg",
423	.match = of_bus_sbus_match,
424	.count_cells = of_bus_sbus_count_cells,
425	.map = of_bus_sbus_map,
426	.translate = of_bus_sbus_translate,
427	.get_flags = of_bus_sbus_get_flags,
428	},
429	/* Default */
430	{
431	.name = "default",
432	.addr_prop_name = "reg",
433	.match = NULL,
434	.count_cells = of_bus_default_count_cells,
435	.map = of_bus_default_map,
436	.translate = of_bus_default_translate,
437	.get_flags = of_bus_default_get_flags,
438	},
439	};
440
441	static struct of_bus of_match_bus(struct device_node np)
442	{
443	int i;
444
445	for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
446	if (!of_busses[i].match \|\| of_busses[i].match(np))
447	return &of_busses[i];
448	BUG();
449	return NULL;
450	}
451
452	static int __init build_one_resource(struct device_node *parent,
453	struct of_bus *bus,
454	struct of_bus *pbus,
455	u32 *addr,
456	int na, int ns, int pna)
457	{
458	u32 *ranges;
459	unsigned int rlen;
460	int rone;
461	u64 offset = OF_BAD_ADDR;
462
463	ranges = of_get_property(parent, "ranges", &rlen);
464	if (ranges == NULL \|\| rlen == 0) {
465	offset = of_read_addr(addr, na);
466	memset(addr, 0, pna * 4);
467	goto finish;
468	}
469
470	/* Now walk through the ranges */
471	rlen /= 4;
472	rone = na + pna + ns;
473	for (; rlen >= rone; rlen -= rone, ranges += rone) {
474	offset = bus->map(addr, ranges, na, ns, pna);
475	if (offset != OF_BAD_ADDR)
476	break;
477	}
478	if (offset == OF_BAD_ADDR)
479	return 1;
480
481	memcpy(addr, ranges + na, 4 * pna);
482
483	finish:
484	/* Translate it into parent bus space */
485	return pbus->translate(addr, offset, pna);
486	}
487
488	static void __init build_device_resources(struct of_device *op,
489	struct device *parent)
490	{
491	struct of_device *p_op;
492	struct of_bus *bus;
493	int na, ns;
494	int index, num_reg;
495	void *preg;
496
497	if (!parent)
498	return;
499
500	p_op = to_of_device(parent);
501	bus = of_match_bus(p_op->node);
502	bus->count_cells(op->node, &na, &ns);
503
504	preg = of_get_property(op->node, bus->addr_prop_name, &num_reg);
505	if (!preg \|\| num_reg == 0)
506	return;
507
508	/* Convert to num-cells. */
509	num_reg /= 4;
510
511	/* Conver to num-entries. */
512	num_reg /= na + ns;
513
514	for (index = 0; index < num_reg; index++) {
515	struct resource *r = &op->resource[index];
516	u32 addr[OF_MAX_ADDR_CELLS];
517	u32 reg = (preg + (index ((na + ns) * 4)));
518	struct device_node *dp = op->node;
519	struct device_node *pp = p_op->node;
520	struct of_bus *pbus;
521	u64 size, result = OF_BAD_ADDR;
522	unsigned long flags;
523	int dna, dns;
524	int pna, pns;
525
526	size = of_read_addr(reg + na, ns);
527	flags = bus->get_flags(reg);
528
529	memcpy(addr, reg, na * 4);
530
531	/* If the immediate parent has no ranges property to apply,
532	* just use a 1<->1 mapping. Unless it is the 'dma' child
533	* of an isa bus, which must be passed up towards the root.
534	*
535	* Also, don't try to translate PMU bus device registers.
536	*/
537	if ((of_find_property(pp, "ranges", NULL) == NULL &&
538	strcmp(pp->name, "dma") != 0) \|\|
539	!strcmp(pp->name, "pmu")) {
540	result = of_read_addr(addr, na);
541	goto build_res;
542	}
543
544	dna = na;
545	dns = ns;
546
547	while (1) {
548	dp = pp;
549	pp = dp->parent;
550	if (!pp) {
551	result = of_read_addr(addr, dna);
552	break;
553	}
554
555	pbus = of_match_bus(pp);
556	pbus->count_cells(dp, &pna, &pns);
557
558	if (build_one_resource(dp, bus, pbus, addr, dna, dns, pna))
559	break;
560
561	dna = pna;
562	dns = pns;
563	bus = pbus;
564	}
565
566	build_res:
567	memset(r, 0, sizeof(*r));
568	if (result != OF_BAD_ADDR) {
569	r->start = result;
570	r->end = result + size - 1;
571	r->flags = flags;
572	} else {
573	r->start = ~0UL;
574	r->end = ~0UL;
575	}
576	r->name = op->node->name;
577	}
578	}
579
580	static struct of_device * __init scan_one_device(struct device_node *dp,
581	struct device *parent)
582	{
583	struct of_device op = kzalloc(sizeof(op), GFP_KERNEL);
584	unsigned int *irq;
585	int len;
586
587	if (!op)
588	return NULL;
589
590	op->node = dp;
591
592	op->clock_freq = of_getintprop_default(dp, "clock-frequency",
593	(2510001000));
594	op->portid = of_getintprop_default(dp, "upa-portid", -1);
595	if (op->portid == -1)
596	op->portid = of_getintprop_default(dp, "portid", -1);
597
598	irq = of_get_property(dp, "interrupts", &len);
599	if (irq)
600	op->irq = *irq;
601	else
602	op->irq = 0xffffffff;
603
604	build_device_resources(op, parent);
605
606	op->dev.parent = parent;
607	op->dev.bus = &of_bus_type;
608	if (!parent)
609	strcpy(op->dev.bus_id, "root");
610	else
611	strcpy(op->dev.bus_id, dp->path_component_name);
612
613	if (of_device_register(op)) {
614	printk("%s: Could not register of device.\n",
615	dp->full_name);
616	kfree(op);
617	op = NULL;
618	}
619
620	return op;
621	}
622
623	static void __init scan_tree(struct device_node dp, struct device parent)
624	{
625	while (dp) {
626	struct of_device *op = scan_one_device(dp, parent);
627
628	if (op)
629	scan_tree(dp->child, &op->dev);
630
631	dp = dp->sibling;
632	}
633	}
634
635	static void __init scan_of_devices(void)
636	{
637	struct device_node *root = of_find_node_by_path("/");
638	struct of_device *parent;
639
640	parent = scan_one_device(root, NULL);
641	if (!parent)
642	return;
643
644	scan_tree(root->child, &parent->dev);
645	}
646
a2bd4fd1 DM	647	static int __init of_bus_driver_init(void)
a2bd4fd1 DM	648	{
cf44bbc2	649	int err;
a2bd4fd1	650
cf44bbc2	651	err = bus_register(&of_bus_type);
a2bd4fd1 DM	652	#ifdef CONFIG_PCI
	653	if (!err)
	654	err = bus_register(&isa_bus_type);
	655	if (!err)
	656	err = bus_register(&ebus_bus_type);
	657	#endif
	658	#ifdef CONFIG_SBUS
	659	if (!err)
	660	err = bus_register(&sbus_bus_type);
	661	#endif
cf44bbc2 DM	662
	663	if (!err)
	664	scan_of_devices();
	665
	666	return err;
a2bd4fd1 DM	667	}
	668
	669	postcore_initcall(of_bus_driver_init);
	670
	671	int of_register_driver(struct of_platform_driver drv, struct bus_type bus)
	672	{
	673	/* initialize common driver fields */
	674	drv->driver.name = drv->name;
	675	drv->driver.bus = bus;
	676
	677	/* register with core */
	678	return driver_register(&drv->driver);
	679	}
	680
	681	void of_unregister_driver(struct of_platform_driver *drv)
	682	{
	683	driver_unregister(&drv->driver);
	684	}
	685
	686
	687	static ssize_t dev_show_devspec(struct device dev, struct device_attribute attr, char *buf)
	688	{
	689	struct of_device *ofdev;
	690
	691	ofdev = to_of_device(dev);
	692	return sprintf(buf, "%s", ofdev->node->full_name);
	693	}
	694
	695	static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL);
	696
	697	/**
	698	* of_release_dev - free an of device structure when all users of it are finished.
	699	* @dev: device that's been disconnected
	700	*
	701	* Will be called only by the device core when all users of this of device are
	702	* done.
	703	*/
	704	void of_release_dev(struct device *dev)
	705	{
	706	struct of_device *ofdev;
	707
	708	ofdev = to_of_device(dev);
	709
	710	kfree(ofdev);
	711	}
	712
	713	int of_device_register(struct of_device *ofdev)
	714	{
	715	int rc;
	716
	717	BUG_ON(ofdev->node == NULL);
	718
	719	rc = device_register(&ofdev->dev);
	720	if (rc)
	721	return rc;
	722
	723	device_create_file(&ofdev->dev, &dev_attr_devspec);
	724
	725	return 0;
	726	}
	727
	728	void of_device_unregister(struct of_device *ofdev)
	729	{
	730	device_remove_file(&ofdev->dev, &dev_attr_devspec);
731	device_unregister(&ofdev->dev);
732	}
733
734	struct of_device* of_platform_device_create(struct device_node *np,
735	const char *bus_id,
736	struct device *parent,
737	struct bus_type *bus)
738	{
739	struct of_device *dev;
740
741	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
742	if (!dev)
743	return NULL;
744	memset(dev, 0, sizeof(*dev));
745
746	dev->dev.parent = parent;
747	dev->dev.bus = bus;
748	dev->dev.release = of_release_dev;
749
750	strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
751
752	if (of_device_register(dev) != 0) {
753	kfree(dev);
754	return NULL;
755	}
756
757	return dev;
758	}
759
760	EXPORT_SYMBOL(of_match_device);
761	EXPORT_SYMBOL(of_register_driver);
762	EXPORT_SYMBOL(of_unregister_driver);
763	EXPORT_SYMBOL(of_device_register);
764	EXPORT_SYMBOL(of_device_unregister);
765	EXPORT_SYMBOL(of_dev_get);
766	EXPORT_SYMBOL(of_dev_put);
767	EXPORT_SYMBOL(of_platform_device_create);
768	EXPORT_SYMBOL(of_release_dev);