mirror of https://gitee.com/openkylin/linux.git
174 lines
3.7 KiB
C
174 lines
3.7 KiB
C
#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/errno.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
#include "of_device_common.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->dev.of_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);
|
|
|
|
unsigned int irq_of_parse_and_map(struct device_node *node, int index)
|
|
{
|
|
struct of_device *op = of_find_device_by_node(node);
|
|
|
|
if (!op || index >= op->num_irqs)
|
|
return 0;
|
|
|
|
return op->irqs[index];
|
|
}
|
|
EXPORT_SYMBOL(irq_of_parse_and_map);
|
|
|
|
/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
|
|
* BUS and propagate to all child of_device objects.
|
|
*/
|
|
void of_propagate_archdata(struct of_device *bus)
|
|
{
|
|
struct dev_archdata *bus_sd = &bus->dev.archdata;
|
|
struct device_node *bus_dp = bus->dev.of_node;
|
|
struct device_node *dp;
|
|
|
|
for (dp = bus_dp->child; dp; dp = dp->sibling) {
|
|
struct of_device *op = of_find_device_by_node(dp);
|
|
|
|
op->dev.archdata.iommu = bus_sd->iommu;
|
|
op->dev.archdata.stc = bus_sd->stc;
|
|
op->dev.archdata.host_controller = bus_sd->host_controller;
|
|
op->dev.archdata.numa_node = bus_sd->numa_node;
|
|
|
|
if (dp->child)
|
|
of_propagate_archdata(op);
|
|
}
|
|
}
|
|
|
|
struct bus_type of_platform_bus_type;
|
|
EXPORT_SYMBOL(of_platform_bus_type);
|
|
|
|
static void 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);
|
|
}
|
|
|
|
/*
|
|
* Default translator (generic bus)
|
|
*/
|
|
|
|
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.
|
|
*/
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
|
|
{
|
|
if (flags)
|
|
return flags;
|
|
return IORESOURCE_MEM;
|
|
}
|
|
|
|
/*
|
|
* SBUS bus specific translator
|
|
*/
|
|
|
|
int of_bus_sbus_match(struct device_node *np)
|
|
{
|
|
struct device_node *dp = np;
|
|
|
|
while (dp) {
|
|
if (!strcmp(dp->name, "sbus") ||
|
|
!strcmp(dp->name, "sbi"))
|
|
return 1;
|
|
|
|
/* Have a look at use_1to1_mapping(). We're trying
|
|
* to match SBUS if that's the top-level bus and we
|
|
* don't have some intervening real bus that provides
|
|
* ranges based translations.
|
|
*/
|
|
if (of_find_property(dp, "ranges", NULL) != NULL)
|
|
break;
|
|
|
|
dp = dp->parent;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec)
|
|
{
|
|
if (addrc)
|
|
*addrc = 2;
|
|
if (sizec)
|
|
*sizec = 1;
|
|
}
|