LXR linux/arch/sparc/kernel/of_device

   1// SPDX-License-Identifier: GPL-2.0-only
   2#include <linux/string.h>
   3#include <linux/kernel.h>
   4#include <linux/of.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_platform.h>
  10#include <linux/of_address.h>
  11#include <linux/of_device.h>
  12#include <linux/of_irq.h>
  13
  14#include "of_device_common.h"
  15
  16unsigned int irq_of_parse_and_map(struct device_node *node, int index)
  17{
  18        struct platform_device *op = of_find_device_by_node(node);
  19
  20        if (!op || index >= op->archdata.num_irqs)
  21                return 0;
  22
  23        return op->archdata.irqs[index];
  24}
  25EXPORT_SYMBOL(irq_of_parse_and_map);
  26
  27int of_address_to_resource(struct device_node *node, int index,
  28                           struct resource *r)
  29{
  30        struct platform_device *op = of_find_device_by_node(node);
  31
  32        if (!op || index >= op->num_resources)
  33                return -EINVAL;
  34
  35        memcpy(r, &op->archdata.resource[index], sizeof(*r));
  36        return 0;
  37}
  38EXPORT_SYMBOL_GPL(of_address_to_resource);
  39
  40void __iomem *of_iomap(struct device_node *node, int index)
  41{
  42        struct platform_device *op = of_find_device_by_node(node);
  43        struct resource *r;
  44
  45        if (!op || index >= op->num_resources)
  46                return NULL;
  47
  48        r = &op->archdata.resource[index];
  49
  50        return of_ioremap(r, 0, resource_size(r), (char *) r->name);
  51}
  52EXPORT_SYMBOL(of_iomap);
  53
  54/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
  55 * BUS and propagate to all child platform_device objects.
  56 */
  57void of_propagate_archdata(struct platform_device *bus)
  58{
  59        struct dev_archdata *bus_sd = &bus->dev.archdata;
  60        struct device_node *bus_dp = bus->dev.of_node;
  61        struct device_node *dp;
  62
  63        for (dp = bus_dp->child; dp; dp = dp->sibling) {
  64                struct platform_device *op = of_find_device_by_node(dp);
  65
  66                op->dev.archdata.iommu = bus_sd->iommu;
  67                op->dev.archdata.stc = bus_sd->stc;
  68                op->dev.archdata.host_controller = bus_sd->host_controller;
  69                op->dev.archdata.numa_node = bus_sd->numa_node;
  70                op->dev.dma_ops = bus->dev.dma_ops;
  71
  72                if (dp->child)
  73                        of_propagate_archdata(op);
  74        }
  75}
  76
  77static void get_cells(struct device_node *dp, int *addrc, int *sizec)
  78{
  79        if (addrc)
  80                *addrc = of_n_addr_cells(dp);
  81        if (sizec)
  82                *sizec = of_n_size_cells(dp);
  83}
  84
  85/*
  86 * Default translator (generic bus)
  87 */
  88
  89void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec)
  90{
  91        get_cells(dev, addrc, sizec);
  92}
  93
  94/* Make sure the least significant 64-bits are in-range.  Even
  95 * for 3 or 4 cell values it is a good enough approximation.
  96 */
  97int of_out_of_range(const u32 *addr, const u32 *base,
  98                    const u32 *size, int na, int ns)
  99{
 100        u64 a = of_read_addr(addr, na);
 101        u64 b = of_read_addr(base, na);
 102
 103        if (a < b)
 104                return 1;
 105
 106        b += of_read_addr(size, ns);
 107        if (a >= b)
 108                return 1;
 109
 110        return 0;
 111}
 112
 113int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna)
 114{
 115        u32 result[OF_MAX_ADDR_CELLS];
 116        int i;
 117
 118        if (ns > 2) {
 119                printk("of_device: Cannot handle size cells (%d) > 2.", ns);
 120                return -EINVAL;
 121        }
 122
 123        if (of_out_of_range(addr, range, range + na + pna, na, ns))
 124                return -EINVAL;
 125
 126        /* Start with the parent range base.  */
 127        memcpy(result, range + na, pna * 4);
 128
 129        /* Add in the child address offset.  */
 130        for (i = 0; i < na; i++)
 131                result[pna - 1 - i] +=
 132                        (addr[na - 1 - i] -
 133                         range[na - 1 - i]);
 134
 135        memcpy(addr, result, pna * 4);
 136
 137        return 0;
 138}
 139
 140unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
 141{
 142        if (flags)
 143                return flags;
 144        return IORESOURCE_MEM;
 145}
 146
 147/*
 148 * SBUS bus specific translator
 149 */
 150
 151int of_bus_sbus_match(struct device_node *np)
 152{
 153        struct device_node *dp = np;
 154
 155        while (dp) {
 156                if (of_node_name_eq(dp, "sbus") ||
 157                    of_node_name_eq(dp, "sbi"))
 158                        return 1;
 159
 160                /* Have a look at use_1to1_mapping().  We're trying
 161                 * to match SBUS if that's the top-level bus and we
 162                 * don't have some intervening real bus that provides
 163                 * ranges based translations.
 164                 */
 165                if (of_find_property(dp, "ranges", NULL) != NULL)
 166                        break;
 167
 168                dp = dp->parent;
 169        }
 170
 171        return 0;
 172}
 173
 174void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec)
 175{
 176        if (addrc)
 177                *addrc = 2;
 178        if (sizec)
 179                *sizec = 1;
 180}
 181