LXR linux/arch/sparc/kernel/of_device

   1#include <linux/string.h>
   2#include <linux/kernel.h>
   3#include <linux/of.h>
   4#include <linux/init.h>
   5#include <linux/export.h>
   6#include <linux/mod_devicetable.h>
   7#include <linux/errno.h>
   8#include <linux/irq.h>
   9#include <linux/of_device.h>
  10#include <linux/of_platform.h>
  11
  12#include "of_device_common.h"
  13
  14unsigned int irq_of_parse_and_map(struct device_node *node, int index)
  15{
  16        struct platform_device *op = of_find_device_by_node(node);
  17
  18        if (!op || index >= op->archdata.num_irqs)
  19                return 0;
  20
  21        return op->archdata.irqs[index];
  22}
  23EXPORT_SYMBOL(irq_of_parse_and_map);
  24
  25int of_address_to_resource(struct device_node *node, int index,
  26                           struct resource *r)
  27{
  28        struct platform_device *op = of_find_device_by_node(node);
  29
  30        if (!op || index >= op->num_resources)
  31                return -EINVAL;
  32
  33        memcpy(r, &op->archdata.resource[index], sizeof(*r));
  34        return 0;
  35}
  36EXPORT_SYMBOL_GPL(of_address_to_resource);
  37
  38void __iomem *of_iomap(struct device_node *node, int index)
  39{
  40        struct platform_device *op = of_find_device_by_node(node);
  41        struct resource *r;
  42
  43        if (!op || index >= op->num_resources)
  44                return NULL;
  45
  46        r = &op->archdata.resource[index];
  47
  48        return of_ioremap(r, 0, resource_size(r), (char *) r->name);
  49}
  50EXPORT_SYMBOL(of_iomap);
  51
  52/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
  53 * BUS and propagate to all child platform_device objects.
  54 */
  55void of_propagate_archdata(struct platform_device *bus)
  56{
  57        struct dev_archdata *bus_sd = &bus->dev.archdata;
  58        struct device_node *bus_dp = bus->dev.of_node;
  59        struct device_node *dp;
  60
  61        for (dp = bus_dp->child; dp; dp = dp->sibling) {
  62                struct platform_device *op = of_find_device_by_node(dp);
  63
  64                op->dev.archdata.iommu = bus_sd->iommu;
  65                op->dev.archdata.stc = bus_sd->stc;
  66                op->dev.archdata.host_controller = bus_sd->host_controller;
  67                op->dev.archdata.numa_node = bus_sd->numa_node;
  68
  69                if (dp->child)
  70                        of_propagate_archdata(op);
  71        }
  72}
  73
  74static void get_cells(struct device_node *dp, int *addrc, int *sizec)
  75{
  76        if (addrc)
  77                *addrc = of_n_addr_cells(dp);
  78        if (sizec)
  79                *sizec = of_n_size_cells(dp);
  80}
  81
  82/*
  83 * Default translator (generic bus)
  84 */
  85
  86void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec)
  87{
  88        get_cells(dev, addrc, sizec);
  89}
  90
  91/* Make sure the least significant 64-bits are in-range.  Even
  92 * for 3 or 4 cell values it is a good enough approximation.
  93 */
  94int of_out_of_range(const u32 *addr, const u32 *base,
  95                    const u32 *size, int na, int ns)
  96{
  97        u64 a = of_read_addr(addr, na);
  98        u64 b = of_read_addr(base, na);
  99
 100        if (a < b)
 101                return 1;
 102
 103        b += of_read_addr(size, ns);
 104        if (a >= b)
 105                return 1;
 106
 107        return 0;
 108}
 109
 110int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna)
 111{
 112        u32 result[OF_MAX_ADDR_CELLS];
 113        int i;
 114
 115        if (ns > 2) {
 116                printk("of_device: Cannot handle size cells (%d) > 2.", ns);
 117                return -EINVAL;
 118        }
 119
 120        if (of_out_of_range(addr, range, range + na + pna, na, ns))
 121                return -EINVAL;
 122
 123        /* Start with the parent range base.  */
 124        memcpy(result, range + na, pna * 4);
 125
 126        /* Add in the child address offset.  */
 127        for (i = 0; i < na; i++)
 128                result[pna - 1 - i] +=
 129                        (addr[na - 1 - i] -
 130                         range[na - 1 - i]);
 131
 132        memcpy(addr, result, pna * 4);
 133
 134        return 0;
 135}
 136
 137unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
 138{
 139        if (flags)
 140                return flags;
 141        return IORESOURCE_MEM;
 142}
 143
 144/*
 145 * SBUS bus specific translator
 146 */
 147
 148int of_bus_sbus_match(struct device_node *np)
 149{
 150        struct device_node *dp = np;
 151
 152        while (dp) {
 153                if (!strcmp(dp->name, "sbus") ||
 154                    !strcmp(dp->name, "sbi"))
 155                        return 1;
 156
 157                /* Have a look at use_1to1_mapping().  We're trying
 158                 * to match SBUS if that's the top-level bus and we
 159                 * don't have some intervening real bus that provides
 160                 * ranges based translations.
 161                 */
 162                if (of_find_property(dp, "ranges", NULL) != NULL)
 163                        break;
 164
 165                dp = dp->parent;
 166        }
 167
 168        return 0;
 169}
 170
 171void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec)
 172{
 173        if (addrc)
 174                *addrc = 2;
 175        if (sizec)
 176                *sizec = 1;
 177}
 178