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/export.h>
   5#include <linux/mod_devicetable.h>
   6#include <linux/errno.h>
   7#include <linux/irq.h>
   8#include <linux/of_platform.h>
   9#include <linux/of_address.h>
  10#include <linux/of_device.h>
  11#include <linux/of_irq.h>
  12
  13#include "of_device_common.h"
  14
  15unsigned int irq_of_parse_and_map(struct device_node *node, int index)
  16{
  17        struct platform_device *op = of_find_device_by_node(node);
  18
  19        if (!op || index >= op->archdata.num_irqs)
  20                return 0;
  21
  22        return op->archdata.irqs[index];
  23}
  24EXPORT_SYMBOL(irq_of_parse_and_map);
  25
  26int of_address_to_resource(struct device_node *node, int index,
  27                           struct resource *r)
  28{
  29        struct platform_device *op = of_find_device_by_node(node);
  30
  31        if (!op || index >= op->num_resources)
  32                return -EINVAL;
  33
  34        memcpy(r, &op->archdata.resource[index], sizeof(*r));
  35        return 0;
  36}
  37EXPORT_SYMBOL_GPL(of_address_to_resource);
  38
  39void __iomem *of_iomap(struct device_node *node, int index)
  40{
  41        struct platform_device *op = of_find_device_by_node(node);
  42        struct resource *r;
  43
  44        if (!op || index >= op->num_resources)
  45                return NULL;
  46
  47        r = &op->archdata.resource[index];
  48
  49        return of_ioremap(r, 0, resource_size(r), (char *) r->name);
  50}
  51EXPORT_SYMBOL(of_iomap);
  52
  53/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
  54 * BUS and propagate to all child platform_device objects.
  55 */
  56void of_propagate_archdata(struct platform_device *bus)
  57{
  58        struct dev_archdata *bus_sd = &bus->dev.archdata;
  59        struct device_node *bus_dp = bus->dev.of_node;
  60        struct device_node *dp;
  61
  62        for (dp = bus_dp->child; dp; dp = dp->sibling) {
  63                struct platform_device *op = of_find_device_by_node(dp);
  64
  65                op->dev.archdata.iommu = bus_sd->iommu;
  66                op->dev.archdata.stc = bus_sd->stc;
  67                op->dev.archdata.host_controller = bus_sd->host_controller;
  68                op->dev.archdata.numa_node = bus_sd->numa_node;
  69
  70                if (dp->child)
  71                        of_propagate_archdata(op);
  72        }
  73}
  74
  75static void get_cells(struct device_node *dp, int *addrc, int *sizec)
  76{
  77        if (addrc)
  78                *addrc = of_n_addr_cells(dp);
  79        if (sizec)
  80                *sizec = of_n_size_cells(dp);
  81}
  82
  83/*
  84 * Default translator (generic bus)
  85 */
  86
  87void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec)
  88{
  89        get_cells(dev, addrc, sizec);
  90}
  91
  92/* Make sure the least significant 64-bits are in-range.  Even
  93 * for 3 or 4 cell values it is a good enough approximation.
  94 */
  95int of_out_of_range(const u32 *addr, const u32 *base,
  96                    const u32 *size, int na, int ns)
  97{
  98        u64 a = of_read_addr(addr, na);
  99        u64 b = of_read_addr(base, na);
 100
 101        if (a < b)
 102                return 1;
 103
 104        b += of_read_addr(size, ns);
 105        if (a >= b)
 106                return 1;
 107
 108        return 0;
 109}
 110
 111int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna)
 112{
 113        u32 result[OF_MAX_ADDR_CELLS];
 114        int i;
 115
 116        if (ns > 2) {
 117                printk("of_device: Cannot handle size cells (%d) > 2.", ns);
 118                return -EINVAL;
 119        }
 120
 121        if (of_out_of_range(addr, range, range + na + pna, na, ns))
 122                return -EINVAL;
 123
 124        /* Start with the parent range base.  */
 125        memcpy(result, range + na, pna * 4);
 126
 127        /* Add in the child address offset.  */
 128        for (i = 0; i < na; i++)
 129                result[pna - 1 - i] +=
 130                        (addr[na - 1 - i] -
 131                         range[na - 1 - i]);
 132
 133        memcpy(addr, result, pna * 4);
 134
 135        return 0;
 136}
 137
 138unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
 139{
 140        if (flags)
 141                return flags;
 142        return IORESOURCE_MEM;
 143}
 144
 145/*
 146 * SBUS bus specific translator
 147 */
 148
 149int of_bus_sbus_match(struct device_node *np)
 150{
 151        struct device_node *dp = np;
 152
 153        while (dp) {
 154                if (!strcmp(dp->name, "sbus") ||
 155                    !strcmp(dp->name, "sbi"))
 156                        return 1;
 157
 158                /* Have a look at use_1to1_mapping().  We're trying
 159                 * to match SBUS if that's the top-level bus and we
 160                 * don't have some intervening real bus that provides
 161                 * ranges based translations.
 162                 */
 163                if (of_find_property(dp, "ranges", NULL) != NULL)
 164                        break;
 165
 166                dp = dp->parent;
 167        }
 168
 169        return 0;
 170}
 171
 172void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec)
 173{
 174        if (addrc)
 175                *addrc = 2;
 176        if (sizec)
 177                *sizec = 1;
 178}
 179