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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [sparc/] [kernel/] [of_device.c] - Blame information for rev 3

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#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
 
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_platform_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;
EXPORT_SYMBOL(ebus_bus_type);
#endif
 
#ifdef CONFIG_SBUS
struct bus_type sbus_bus_type;
EXPORT_SYMBOL(sbus_bus_type);
#endif
 
struct bus_type of_platform_bus_type;
EXPORT_SYMBOL(of_platform_bus_type);
 
static inline u64 of_read_addr(const 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);
        int             (*map)(u32 *addr, const u32 *range,
                               int na, int ns, int pna);
        unsigned int    (*get_flags)(const 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);
}
 
/* Make sure the least significant 64-bits are in-range.  Even
 * for 3 or 4 cell values it is a good enough approximation.
 */
static int of_out_of_range(const u32 *addr, const u32 *base,
                           const u32 *size, int na, int ns)
{
        u64 a = of_read_addr(addr, na);
        u64 b = of_read_addr(base, na);
 
        if (a < b)
                return 1;
 
        b += of_read_addr(size, ns);
        if (a >= b)
                return 1;
 
        return 0;
}
 
static int of_bus_default_map(u32 *addr, const u32 *range,
                              int na, int ns, int pna)
{
        u32 result[OF_MAX_ADDR_CELLS];
        int i;
 
        if (ns > 2) {
                printk("of_device: Cannot handle size cells (%d) > 2.", ns);
                return -EINVAL;
        }
 
        if (of_out_of_range(addr, range, range + na + pna, na, ns))
                return -EINVAL;
 
        /* Start with the parent range base.  */
        memcpy(result, range + na, pna * 4);
 
        /* Add in the child address offset.  */
        for (i = 0; i < na; i++)
                result[pna - 1 - i] +=
                        (addr[na - 1 - i] -
                         range[na - 1 - i]);
 
        memcpy(addr, result, pna * 4);
 
        return 0;
}
 
static unsigned int of_bus_default_get_flags(const u32 *addr)
{
        return IORESOURCE_MEM;
}
 
/*
 * PCI bus specific translator
 */
 
static int of_bus_pci_match(struct device_node *np)
{
        if (!strcmp(np->type, "pci") || !strcmp(np->type, "pciex")) {
                /* Do not do PCI specific frobbing if the
                 * PCI bridge lacks a ranges property.  We
                 * want to pass it through up to the next
                 * parent as-is, not with the PCI translate
                 * method which chops off the top address cell.
                 */
                if (!of_find_property(np, "ranges", NULL))
                        return 0;
 
                return 1;
        }
 
        return 0;
}
 
static void of_bus_pci_count_cells(struct device_node *np,
                                   int *addrc, int *sizec)
{
        if (addrc)
                *addrc = 3;
        if (sizec)
                *sizec = 2;
}
 
static int of_bus_pci_map(u32 *addr, const u32 *range,
                          int na, int ns, int pna)
{
        u32 result[OF_MAX_ADDR_CELLS];
        int i;
 
        /* Check address type match */
        if ((addr[0] ^ range[0]) & 0x03000000)
                return -EINVAL;
 
        if (of_out_of_range(addr + 1, range + 1, range + na + pna,
                            na - 1, ns))
                return -EINVAL;
 
        /* Start with the parent range base.  */
        memcpy(result, range + na, pna * 4);
 
        /* Add in the child address offset, skipping high cell.  */
        for (i = 0; i < na - 1; i++)
                result[pna - 1 - i] +=
                        (addr[na - 1 - i] -
                         range[na - 1 - i]);
 
        memcpy(addr, result, pna * 4);
 
        return 0;
}
 
static unsigned int of_bus_pci_get_flags(const 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 int of_bus_sbus_map(u32 *addr, const u32 *range, int na, int ns, int pna)
{
        return of_bus_default_map(addr, range, na, ns, pna);
}
 
static unsigned int of_bus_sbus_get_flags(const 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,
                .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,
                .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,
                .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)
{
        const u32 *ranges;
        unsigned int rlen;
        int rone;
 
        ranges = of_get_property(parent, "ranges", &rlen);
        if (ranges == NULL || rlen == 0) {
                u32 result[OF_MAX_ADDR_CELLS];
                int i;
 
                memset(result, 0, pna * 4);
                for (i = 0; i < na; i++)
                        result[pna - 1 - i] =
                                addr[na - 1 - i];
 
                memcpy(addr, result, pna * 4);
                return 0;
        }
 
        /* Now walk through the ranges */
        rlen /= 4;
        rone = na + pna + ns;
        for (; rlen >= rone; rlen -= rone, ranges += rone) {
                if (!bus->map(addr, ranges, na, ns, pna))
                        return 0;
        }
 
        return 1;
}
 
static int of_resource_verbose;
 
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;
        const 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];
                const u32 *reg = (preg + (index * ((na + ns) * 4)));
                struct device_node *dp = op->node;
                struct device_node *pp = p_op->node;
                struct of_bus *pbus, *dbus;
                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;
                dbus = bus;
 
                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, dbus, pbus, addr,
                                               dna, dns, pna))
                                break;
 
                        dna = pna;
                        dns = pns;
                        dbus = pbus;
                }
 
        build_res:
                memset(r, 0, sizeof(*r));
 
                if (of_resource_verbose)
                        printk("%s reg[%d] -> %llx\n",
                               op->node->full_name, index,
                               result);
 
                if (result != OF_BAD_ADDR) {
                        r->start = result & 0xffffffff;
                        r->end = result + size - 1;
                        r->flags = flags | ((result >> 32ULL) & 0xffUL);
                }
                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);
        const struct linux_prom_irqs *intr;
        struct dev_archdata *sd;
        int len, i;
 
        if (!op)
                return NULL;
 
        sd = &op->dev.archdata;
        sd->prom_node = dp;
        sd->op = op;
 
        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 {
                const 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 *io_unit, *sbi = dp->parent;
                const struct linux_prom_registers *regs;
                int board, slot;
 
                while (sbi) {
                        if (!strcmp(sbi->name, "sbi"))
                                break;
 
                        sbi = sbi->parent;
                }
                if (!sbi)
                        goto build_resources;
 
                regs = of_get_property(dp, "reg", NULL);
                if (!regs)
                        goto build_resources;
 
                slot = regs->which_io;
 
                /* If SBI's parent is not io-unit or the io-unit lacks
                 * a "board#" property, something is very wrong.
                 */
                if (!sbi->parent || strcmp(sbi->parent->name, "io-unit")) {
                        printk("%s: Error, parent is not io-unit.\n",
                               sbi->full_name);
                        goto build_resources;
                }
                io_unit = sbi->parent;
                board = of_getintprop_default(io_unit, "board#", -1);
                if (board == -1) {
                        printk("%s: Error, lacks board# property.\n",
                               io_unit->full_name);
                        goto build_resources;
                }
 
                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_resources:
        build_device_resources(op, parent);
 
        op->dev.parent = parent;
        op->dev.bus = &of_platform_bus_type;
        if (!parent)
                strcpy(op->dev.bus_id, "root");
        else
                sprintf(op->dev.bus_id, "%08x", dp->node);
 
        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 = of_bus_type_init(&of_platform_bus_type, "of");
#ifdef CONFIG_PCI
        if (!err)
                err = of_bus_type_init(&ebus_bus_type, "ebus");
#endif
#ifdef CONFIG_SBUS
        if (!err)
                err = of_bus_type_init(&sbus_bus_type, "sbus");
#endif
 
        if (!err)
                scan_of_devices();
 
        return err;
}
 
postcore_initcall(of_bus_driver_init);
 
static int __init of_debug(char *str)
{
        int val = 0;
 
        get_option(&str, &val);
        if (val & 1)
                of_resource_verbose = 1;
        return 1;
}
 
__setup("of_debug=", of_debug);
 
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 = kzalloc(sizeof(*dev), GFP_KERNEL);
        if (!dev)
                return NULL;
 
        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_platform_device_create);

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Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [sparc/] [kernel/] [of_device.c] - Blame information for rev 3

Line No.	Rev	Author	Line
1	3	xianfeng	`#include <linux/string.h>`
2			`#include <linux/kernel.h>`
3			`#include <linux/of.h>`
4			`#include <linux/init.h>`
5			`#include <linux/module.h>`
6			`#include <linux/mod_devicetable.h>`
7			`#include <linux/slab.h>`
8			`#include <linux/errno.h>`
9			`#include <linux/of_device.h>`
10			`#include <linux/of_platform.h>`
11
12			`static int node_match(struct device dev, void data)`
13			`{`
14			`struct of_device *op = to_of_device(dev);`
15			`struct device_node *dp = data;`
16
17			`return (op->node == dp);`
18			`}`
19
20			`struct of_device of_find_device_by_node(struct device_node dp)`
21			`{`
22			`struct device *dev = bus_find_device(&of_platform_bus_type, NULL,`
23			`dp, node_match);`
24
25			`if (dev)`
26			`return to_of_device(dev);`
27
28			`return NULL;`
29			`}`
30			`EXPORT_SYMBOL(of_find_device_by_node);`
31
32			`#ifdef CONFIG_PCI`
33			`struct bus_type ebus_bus_type;`
34			`EXPORT_SYMBOL(ebus_bus_type);`
35			`#endif`
36
37			`#ifdef CONFIG_SBUS`
38			`struct bus_type sbus_bus_type;`
39			`EXPORT_SYMBOL(sbus_bus_type);`
40			`#endif`
41
42			`struct bus_type of_platform_bus_type;`
43			`EXPORT_SYMBOL(of_platform_bus_type);`
44
45			`static inline u64 of_read_addr(const u32 *cell, int size)`
46			`{`
47			`u64 r = 0;`
48			`while (size--)`
49			`r = (r << 32) \| *(cell++);`
50			`return r;`
51			`}`
52
53			`static void __init get_cells(struct device_node *dp,`
54			`int addrc, int sizec)`
55			`{`
56			`if (addrc)`
57			`*addrc = of_n_addr_cells(dp);`
58			`if (sizec)`
59			`*sizec = of_n_size_cells(dp);`
60			`}`
61
62			`/* Max address size we deal with */`
63			`#define OF_MAX_ADDR_CELLS 4`
64
65			`struct of_bus {`
66			`const char *name;`
67			`const char *addr_prop_name;`
68			`int (match)(struct device_node parent);`
69			`void (count_cells)(struct device_node child,`
70			`int addrc, int sizec);`
71			`int (map)(u32 addr, const u32 *range,`
72			`int na, int ns, int pna);`
73			`unsigned int (get_flags)(const u32 addr);`
74			`};`
75
76			`/*`
77			`* Default translator (generic bus)`
78			`*/`
79
80			`static void of_bus_default_count_cells(struct device_node *dev,`
81			`int addrc, int sizec)`
82			`{`
83			`get_cells(dev, addrc, sizec);`
84			`}`
85
86			`/* Make sure the least significant 64-bits are in-range. Even`
87			`* for 3 or 4 cell values it is a good enough approximation.`
88			`*/`
89			`static int of_out_of_range(const u32 addr, const u32 base,`
90			`const u32 *size, int na, int ns)`
91			`{`
92			`u64 a = of_read_addr(addr, na);`
93			`u64 b = of_read_addr(base, na);`
94
95			`if (a < b)`
96			`return 1;`
97
98			`b += of_read_addr(size, ns);`
99			`if (a >= b)`
100			`return 1;`
101
102			`return 0;`
103			`}`
104
105			`static int of_bus_default_map(u32 addr, const u32 range,`
106			`int na, int ns, int pna)`
107			`{`
108			`u32 result[OF_MAX_ADDR_CELLS];`
109			`int i;`
110
111			`if (ns > 2) {`
112			`printk("of_device: Cannot handle size cells (%d) > 2.", ns);`
113			`return -EINVAL;`
114			`}`
115
116			`if (of_out_of_range(addr, range, range + na + pna, na, ns))`
117			`return -EINVAL;`
118
119			`/* Start with the parent range base. */`
120			`memcpy(result, range + na, pna * 4);`
121
122			`/* Add in the child address offset. */`
123			`for (i = 0; i < na; i++)`
124			`result[pna - 1 - i] +=`
125			`(addr[na - 1 - i] -`
126			`range[na - 1 - i]);`
127
128			`memcpy(addr, result, pna * 4);`
129
130			`return 0;`
131			`}`
132
133			`static unsigned int of_bus_default_get_flags(const u32 *addr)`
134			`{`
135			`return IORESOURCE_MEM;`
136			`}`
137
138			`/*`
139			`* PCI bus specific translator`
140			`*/`
141
142			`static int of_bus_pci_match(struct device_node *np)`
143			`{`
144			`if (!strcmp(np->type, "pci") \|\| !strcmp(np->type, "pciex")) {`
145			`/* Do not do PCI specific frobbing if the`
146			`* PCI bridge lacks a ranges property. We`
147			`* want to pass it through up to the next`
148			`* parent as-is, not with the PCI translate`
149			`* method which chops off the top address cell.`
150			`*/`
151			`if (!of_find_property(np, "ranges", NULL))`
152			`return 0;`
153
154			`return 1;`
155			`}`
156
157			`return 0;`
158			`}`
159
160			`static void of_bus_pci_count_cells(struct device_node *np,`
161			`int addrc, int sizec)`
162			`{`
163			`if (addrc)`
164			`*addrc = 3;`
165			`if (sizec)`
166			`*sizec = 2;`
167			`}`
168
169			`static int of_bus_pci_map(u32 addr, const u32 range,`
170			`int na, int ns, int pna)`
171			`{`
172			`u32 result[OF_MAX_ADDR_CELLS];`
173			`int i;`
174
175			`/* Check address type match */`
176			`if ((addr[0] ^ range[0]) & 0x03000000)`
177			`return -EINVAL;`
178
179			`if (of_out_of_range(addr + 1, range + 1, range + na + pna,`
180			`na - 1, ns))`
181			`return -EINVAL;`
182
183			`/* Start with the parent range base. */`
184			`memcpy(result, range + na, pna * 4);`
185
186			`/* Add in the child address offset, skipping high cell. */`
187			`for (i = 0; i < na - 1; i++)`
188			`result[pna - 1 - i] +=`
189			`(addr[na - 1 - i] -`
190			`range[na - 1 - i]);`
191
192			`memcpy(addr, result, pna * 4);`
193
194			`return 0;`
195			`}`
196
197			`static unsigned int of_bus_pci_get_flags(const u32 *addr)`
198			`{`
199			`unsigned int flags = 0;`
200			`u32 w = addr[0];`
201
202			`switch((w >> 24) & 0x03) {`
203			`case 0x01:`
204			`flags \|= IORESOURCE_IO;`
205			`case 0x02: /* 32 bits */`
206			`case 0x03: /* 64 bits */`
207			`flags \|= IORESOURCE_MEM;`
208			`}`
209			`if (w & 0x40000000)`
210			`flags \|= IORESOURCE_PREFETCH;`
211			`return flags;`
212			`}`
213
214			`/*`
215			`* SBUS bus specific translator`
216			`*/`
217
218			`static int of_bus_sbus_match(struct device_node *np)`
219			`{`
220			`return !strcmp(np->name, "sbus") \|\|`
221			`!strcmp(np->name, "sbi");`
222			`}`
223
224			`static void of_bus_sbus_count_cells(struct device_node *child,`
225			`int addrc, int sizec)`
226			`{`
227			`if (addrc)`
228			`*addrc = 2;`
229			`if (sizec)`
230			`*sizec = 1;`
231			`}`
232
233			`static int of_bus_sbus_map(u32 addr, const u32 range, int na, int ns, int pna)`
234			`{`
235			`return of_bus_default_map(addr, range, na, ns, pna);`
236			`}`
237
238			`static unsigned int of_bus_sbus_get_flags(const u32 *addr)`
239			`{`
240			`return IORESOURCE_MEM;`
241			`}`
242
243
244			`/*`
245			`* Array of bus specific translators`
246			`*/`
247
248			`static struct of_bus of_busses[] = {`
249			`/* PCI */`
250			`{`
251			`.name = "pci",`
252			`.addr_prop_name = "assigned-addresses",`
253			`.match = of_bus_pci_match,`
254			`.count_cells = of_bus_pci_count_cells,`
255			`.map = of_bus_pci_map,`
256			`.get_flags = of_bus_pci_get_flags,`
257			`},`
258			`/* SBUS */`
259			`{`
260			`.name = "sbus",`
261			`.addr_prop_name = "reg",`
262			`.match = of_bus_sbus_match,`
263			`.count_cells = of_bus_sbus_count_cells,`
264			`.map = of_bus_sbus_map,`
265			`.get_flags = of_bus_sbus_get_flags,`
266			`},`
267			`/* Default */`
268			`{`
269			`.name = "default",`
270			`.addr_prop_name = "reg",`
271			`.match = NULL,`
272			`.count_cells = of_bus_default_count_cells,`
273			`.map = of_bus_default_map,`
274			`.get_flags = of_bus_default_get_flags,`
275			`},`
276			`};`
277
278			`static struct of_bus of_match_bus(struct device_node np)`
279			`{`
280			`int i;`
281
282			`for (i = 0; i < ARRAY_SIZE(of_busses); i ++)`
283			`if (!of_busses[i].match \|\| of_busses[i].match(np))`
284			`return &of_busses[i];`
285			`BUG();`
286			`return NULL;`
287			`}`
288
289			`static int __init build_one_resource(struct device_node *parent,`
290			`struct of_bus *bus,`
291			`struct of_bus *pbus,`
292			`u32 *addr,`
293			`int na, int ns, int pna)`
294			`{`
295			`const u32 *ranges;`
296			`unsigned int rlen;`
297			`int rone;`
298
299			`ranges = of_get_property(parent, "ranges", &rlen);`
300			`if (ranges == NULL \|\| rlen == 0) {`
301			`u32 result[OF_MAX_ADDR_CELLS];`
302			`int i;`
303
304			`memset(result, 0, pna * 4);`
305			`for (i = 0; i < na; i++)`
306			`result[pna - 1 - i] =`
307			`addr[na - 1 - i];`
308
309			`memcpy(addr, result, pna * 4);`
310			`return 0;`
311			`}`
312
313			`/* Now walk through the ranges */`
314			`rlen /= 4;`
315			`rone = na + pna + ns;`
316			`for (; rlen >= rone; rlen -= rone, ranges += rone) {`
317			`if (!bus->map(addr, ranges, na, ns, pna))`
318			`return 0;`
319			`}`
320
321			`return 1;`
322			`}`
323
324			`static int of_resource_verbose;`
325
326			`static void __init build_device_resources(struct of_device *op,`
327			`struct device *parent)`
328			`{`
329			`struct of_device *p_op;`
330			`struct of_bus *bus;`
331			`int na, ns;`
332			`int index, num_reg;`
333			`const void *preg;`
334
335			`if (!parent)`
336			`return;`
337
338			`p_op = to_of_device(parent);`
339			`bus = of_match_bus(p_op->node);`
340			`bus->count_cells(op->node, &na, &ns);`
341
342			`preg = of_get_property(op->node, bus->addr_prop_name, &num_reg);`
343			`if (!preg \|\| num_reg == 0)`
344			`return;`
345
346			`/* Convert to num-cells. */`
347			`num_reg /= 4;`
348
349			`/* Conver to num-entries. */`
350			`num_reg /= na + ns;`
351
352			`for (index = 0; index < num_reg; index++) {`
353			`struct resource *r = &op->resource[index];`
354			`u32 addr[OF_MAX_ADDR_CELLS];`
355			`const u32 reg = (preg + (index ((na + ns) * 4)));`
356			`struct device_node *dp = op->node;`
357			`struct device_node *pp = p_op->node;`
358			`struct of_bus pbus, dbus;`
359			`u64 size, result = OF_BAD_ADDR;`
360			`unsigned long flags;`
361			`int dna, dns;`
362			`int pna, pns;`
363
364			`size = of_read_addr(reg + na, ns);`
365			`flags = bus->get_flags(reg);`
366
367			`memcpy(addr, reg, na * 4);`
368
369			`/* If the immediate parent has no ranges property to apply,`
370			`* just use a 1<->1 mapping.`
371			`*/`
372			`if (of_find_property(pp, "ranges", NULL) == NULL) {`
373			`result = of_read_addr(addr, na);`
374			`goto build_res;`
375			`}`
376
377			`dna = na;`
378			`dns = ns;`
379			`dbus = bus;`
380
381			`while (1) {`
382			`dp = pp;`
383			`pp = dp->parent;`
384			`if (!pp) {`
385			`result = of_read_addr(addr, dna);`
386			`break;`
387			`}`
388
389			`pbus = of_match_bus(pp);`
390			`pbus->count_cells(dp, &pna, &pns);`
391
392			`if (build_one_resource(dp, dbus, pbus, addr,`
393			`dna, dns, pna))`
394			`break;`
395
396			`dna = pna;`
397			`dns = pns;`
398			`dbus = pbus;`
399			`}`
400
401			`build_res:`
402			`memset(r, 0, sizeof(*r));`
403
404			`if (of_resource_verbose)`
405			`printk("%s reg[%d] -> %llx\n",`
406			`op->node->full_name, index,`
407			`result);`
408
409			`if (result != OF_BAD_ADDR) {`
410			`r->start = result & 0xffffffff;`
411			`r->end = result + size - 1;`
412			`r->flags = flags \| ((result >> 32ULL) & 0xffUL);`
413			`}`
414			`r->name = op->node->name;`
415			`}`
416			`}`
417
418			`static struct of_device * __init scan_one_device(struct device_node *dp,`
419			`struct device *parent)`
420			`{`
421			`struct of_device op = kzalloc(sizeof(op), GFP_KERNEL);`
422			`const struct linux_prom_irqs *intr;`
423			`struct dev_archdata *sd;`
424			`int len, i;`
425
426			`if (!op)`
427			`return NULL;`
428
429			`sd = &op->dev.archdata;`
430			`sd->prom_node = dp;`
431			`sd->op = op;`
432
433			`op->node = dp;`
434
435			`op->clock_freq = of_getintprop_default(dp, "clock-frequency",`
436			`(2510001000));`
437			`op->portid = of_getintprop_default(dp, "upa-portid", -1);`
438			`if (op->portid == -1)`
439			`op->portid = of_getintprop_default(dp, "portid", -1);`
440
441			`intr = of_get_property(dp, "intr", &len);`
442			`if (intr) {`
443			`op->num_irqs = len / sizeof(struct linux_prom_irqs);`
444			`for (i = 0; i < op->num_irqs; i++)`
445			`op->irqs[i] = intr[i].pri;`
446			`} else {`
447			`const unsigned int *irq =`
448			`of_get_property(dp, "interrupts", &len);`
449
450			`if (irq) {`
451			`op->num_irqs = len / sizeof(unsigned int);`
452			`for (i = 0; i < op->num_irqs; i++)`
453			`op->irqs[i] = irq[i];`
454			`} else {`
455			`op->num_irqs = 0;`
456			`}`
457			`}`
458			`if (sparc_cpu_model == sun4d) {`
459			`static int pil_to_sbus[] = {`
460			`0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,`
461			`};`
462			`struct device_node io_unit, sbi = dp->parent;`
463			`const struct linux_prom_registers *regs;`
464			`int board, slot;`
465
466			`while (sbi) {`
467			`if (!strcmp(sbi->name, "sbi"))`
468			`break;`
469
470			`sbi = sbi->parent;`
471			`}`
472			`if (!sbi)`
473			`goto build_resources;`
474
475			`regs = of_get_property(dp, "reg", NULL);`
476			`if (!regs)`
477			`goto build_resources;`
478
479			`slot = regs->which_io;`
480
481			`/* If SBI's parent is not io-unit or the io-unit lacks`
482			`* a "board#" property, something is very wrong.`
483			`*/`
484			`if (!sbi->parent \|\| strcmp(sbi->parent->name, "io-unit")) {`
485			`printk("%s: Error, parent is not io-unit.\n",`
486			`sbi->full_name);`
487			`goto build_resources;`
488			`}`
489			`io_unit = sbi->parent;`
490			`board = of_getintprop_default(io_unit, "board#", -1);`
491			`if (board == -1) {`
492			`printk("%s: Error, lacks board# property.\n",`
493			`io_unit->full_name);`
494			`goto build_resources;`
495			`}`
496
497			`for (i = 0; i < op->num_irqs; i++) {`
498			`int this_irq = op->irqs[i];`
499			`int sbusl = pil_to_sbus[this_irq];`
500
501			`if (sbusl)`
502			`this_irq = (((board + 1) << 5) +`
503			`(sbusl << 2) +`
504			`slot);`
505
506			`op->irqs[i] = this_irq;`
507			`}`
508			`}`
509
510			`build_resources:`
511			`build_device_resources(op, parent);`
512
513			`op->dev.parent = parent;`
514			`op->dev.bus = &of_platform_bus_type;`
515			`if (!parent)`
516			`strcpy(op->dev.bus_id, "root");`
517			`else`
518			`sprintf(op->dev.bus_id, "%08x", dp->node);`
519
520			`if (of_device_register(op)) {`
521			`printk("%s: Could not register of device.\n",`
522			`dp->full_name);`
523			`kfree(op);`
524			`op = NULL;`
525			`}`
526
527			`return op;`
528			`}`
529
530			`static void __init scan_tree(struct device_node dp, struct device parent)`
531			`{`
532			`while (dp) {`
533			`struct of_device *op = scan_one_device(dp, parent);`
534
535			`if (op)`
536			`scan_tree(dp->child, &op->dev);`
537
538			`dp = dp->sibling;`
539			`}`
540			`}`
541
542			`static void __init scan_of_devices(void)`
543			`{`
544			`struct device_node *root = of_find_node_by_path("/");`
545			`struct of_device *parent;`
546
547			`parent = scan_one_device(root, NULL);`
548			`if (!parent)`
549			`return;`
550
551			`scan_tree(root->child, &parent->dev);`
552			`}`
553
554			`static int __init of_bus_driver_init(void)`
555			`{`
556			`int err;`
557
558			`err = of_bus_type_init(&of_platform_bus_type, "of");`
559			`#ifdef CONFIG_PCI`
560			`if (!err)`
561			`err = of_bus_type_init(&ebus_bus_type, "ebus");`
562			`#endif`
563			`#ifdef CONFIG_SBUS`
564			`if (!err)`
565			`err = of_bus_type_init(&sbus_bus_type, "sbus");`
566			`#endif`
567
568			`if (!err)`
569			`scan_of_devices();`
570
571			`return err;`
572			`}`
573
574			`postcore_initcall(of_bus_driver_init);`
575
576			`static int __init of_debug(char *str)`
577			`{`
578			`int val = 0;`
579
580			`get_option(&str, &val);`
581			`if (val & 1)`
582			`of_resource_verbose = 1;`
583			`return 1;`
584			`}`
585
586			`__setup("of_debug=", of_debug);`
587
588			`struct of_device* of_platform_device_create(struct device_node *np,`
589			`const char *bus_id,`
590			`struct device *parent,`
591			`struct bus_type *bus)`
592			`{`
593			`struct of_device *dev;`
594
595			`dev = kzalloc(sizeof(*dev), GFP_KERNEL);`
596			`if (!dev)`
597			`return NULL;`
598
599			`dev->dev.parent = parent;`
600			`dev->dev.bus = bus;`
601			`dev->dev.release = of_release_dev;`
602
603			`strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);`
604
605			`if (of_device_register(dev) != 0) {`
606			`kfree(dev);`
607			`return NULL;`
608			`}`
609
610			`return dev;`
611			`}`
612
613			`EXPORT_SYMBOL(of_platform_device_create);`