2005-10-06 11:22:17 +08:00
|
|
|
#include <linux/string.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/mod_devicetable.h>
|
2005-10-31 10:57:01 +08:00
|
|
|
#include <linux/slab.h>
|
|
|
|
|
2005-10-06 11:22:17 +08:00
|
|
|
#include <asm/errno.h>
|
|
|
|
#include <asm/of_device.h>
|
|
|
|
|
|
|
|
/**
|
2006-11-11 14:24:59 +08:00
|
|
|
* of_match_node - Tell if an device_node has a matching of_match structure
|
2005-10-06 11:22:17 +08:00
|
|
|
* @ids: array of of device match structures to search in
|
2006-11-11 14:24:59 +08:00
|
|
|
* @node: the of device structure to match against
|
2005-10-06 11:22:17 +08:00
|
|
|
*
|
2006-11-11 14:24:59 +08:00
|
|
|
* Low level utility function used by device matching.
|
2005-10-06 11:22:17 +08:00
|
|
|
*/
|
2006-11-11 14:24:59 +08:00
|
|
|
const struct of_device_id *of_match_node(const struct of_device_id *matches,
|
|
|
|
const struct device_node *node)
|
2005-10-06 11:22:17 +08:00
|
|
|
{
|
|
|
|
while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
|
|
|
|
int match = 1;
|
|
|
|
if (matches->name[0])
|
2006-11-11 14:24:59 +08:00
|
|
|
match &= node->name
|
|
|
|
&& !strcmp(matches->name, node->name);
|
2005-10-06 11:22:17 +08:00
|
|
|
if (matches->type[0])
|
2006-11-11 14:24:59 +08:00
|
|
|
match &= node->type
|
|
|
|
&& !strcmp(matches->type, node->type);
|
2005-10-06 11:22:17 +08:00
|
|
|
if (matches->compatible[0])
|
2007-05-03 15:26:52 +08:00
|
|
|
match &= of_device_is_compatible(node,
|
2006-11-11 14:24:59 +08:00
|
|
|
matches->compatible);
|
2005-10-06 11:22:17 +08:00
|
|
|
if (match)
|
|
|
|
return matches;
|
|
|
|
matches++;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2006-11-11 14:24:59 +08:00
|
|
|
/**
|
|
|
|
* of_match_device - Tell if an of_device structure has a matching
|
|
|
|
* of_match structure
|
|
|
|
* @ids: array of of device match structures to search in
|
|
|
|
* @dev: the of device structure to match against
|
|
|
|
*
|
|
|
|
* Used by a driver to check whether an of_device present in the
|
|
|
|
* system is in its list of supported devices.
|
|
|
|
*/
|
|
|
|
const struct of_device_id *of_match_device(const struct of_device_id *matches,
|
|
|
|
const struct of_device *dev)
|
2005-10-06 11:22:17 +08:00
|
|
|
{
|
2006-11-11 14:24:59 +08:00
|
|
|
if (!dev->node)
|
|
|
|
return NULL;
|
|
|
|
return of_match_node(matches, dev->node);
|
2005-10-06 11:22:17 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
struct of_device *of_dev_get(struct of_device *dev)
|
|
|
|
{
|
|
|
|
struct device *tmp;
|
|
|
|
|
|
|
|
if (!dev)
|
|
|
|
return NULL;
|
|
|
|
tmp = get_device(&dev->dev);
|
|
|
|
if (tmp)
|
|
|
|
return to_of_device(tmp);
|
|
|
|
else
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
void of_dev_put(struct of_device *dev)
|
|
|
|
{
|
|
|
|
if (dev)
|
|
|
|
put_device(&dev->dev);
|
|
|
|
}
|
|
|
|
|
2006-11-11 14:24:59 +08:00
|
|
|
static ssize_t dev_show_devspec(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
2005-10-06 11:22:17 +08:00
|
|
|
{
|
|
|
|
struct of_device *ofdev;
|
|
|
|
|
|
|
|
ofdev = to_of_device(dev);
|
|
|
|
return sprintf(buf, "%s", ofdev->node->full_name);
|
|
|
|
}
|
|
|
|
|
|
|
|
static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* of_release_dev - free an of device structure when all users of it are finished.
|
|
|
|
* @dev: device that's been disconnected
|
|
|
|
*
|
|
|
|
* Will be called only by the device core when all users of this of device are
|
|
|
|
* done.
|
|
|
|
*/
|
|
|
|
void of_release_dev(struct device *dev)
|
|
|
|
{
|
|
|
|
struct of_device *ofdev;
|
|
|
|
|
|
|
|
ofdev = to_of_device(dev);
|
|
|
|
of_node_put(ofdev->node);
|
|
|
|
kfree(ofdev);
|
|
|
|
}
|
|
|
|
|
|
|
|
int of_device_register(struct of_device *ofdev)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
BUG_ON(ofdev->node == NULL);
|
|
|
|
|
|
|
|
rc = device_register(&ofdev->dev);
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
|
2006-12-08 16:23:07 +08:00
|
|
|
return device_create_file(&ofdev->dev, &dev_attr_devspec);
|
2005-10-06 11:22:17 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
void of_device_unregister(struct of_device *ofdev)
|
|
|
|
{
|
|
|
|
device_remove_file(&ofdev->dev, &dev_attr_devspec);
|
|
|
|
|
|
|
|
device_unregister(&ofdev->dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2007-02-13 06:13:25 +08:00
|
|
|
static ssize_t of_device_get_modalias(struct of_device *ofdev,
|
|
|
|
char *str, ssize_t len)
|
|
|
|
{
|
|
|
|
const char *compat;
|
|
|
|
int cplen, i;
|
|
|
|
ssize_t tsize, csize, repend;
|
|
|
|
|
|
|
|
/* Name & Type */
|
|
|
|
csize = snprintf(str, len, "of:N%sT%s",
|
|
|
|
ofdev->node->name, ofdev->node->type);
|
|
|
|
|
|
|
|
/* Get compatible property if any */
|
2007-04-13 15:14:22 +08:00
|
|
|
compat = of_get_property(ofdev->node, "compatible", &cplen);
|
2007-02-13 06:13:25 +08:00
|
|
|
if (!compat)
|
|
|
|
return csize;
|
|
|
|
|
|
|
|
/* Find true end (we tolerate multiple \0 at the end */
|
|
|
|
for (i=(cplen-1); i>=0 && !compat[i]; i--)
|
|
|
|
cplen--;
|
|
|
|
if (!cplen)
|
|
|
|
return csize;
|
|
|
|
cplen++;
|
|
|
|
|
|
|
|
/* Check space (need cplen+1 chars including final \0) */
|
|
|
|
tsize = csize + cplen;
|
|
|
|
repend = tsize;
|
|
|
|
|
|
|
|
if (csize>=len) /* @ the limit, all is already filled */
|
|
|
|
return tsize;
|
|
|
|
|
|
|
|
if (tsize>=len) { /* limit compat list */
|
|
|
|
cplen = len-csize-1;
|
|
|
|
repend = len;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Copy and do char replacement */
|
|
|
|
memcpy(&str[csize+1], compat, cplen);
|
|
|
|
for (i=csize; i<repend; i++) {
|
|
|
|
char c = str[i];
|
|
|
|
if (c=='\0')
|
|
|
|
str[i] = 'C';
|
|
|
|
else if (c==' ')
|
|
|
|
str[i] = '_';
|
|
|
|
}
|
|
|
|
|
|
|
|
return tsize;
|
|
|
|
}
|
|
|
|
|
|
|
|
int of_device_uevent(struct device *dev,
|
|
|
|
char **envp, int num_envp, char *buffer, int buffer_size)
|
|
|
|
{
|
|
|
|
struct of_device *ofdev;
|
|
|
|
const char *compat;
|
|
|
|
int i = 0, length = 0, seen = 0, cplen, sl;
|
|
|
|
|
|
|
|
if (!dev)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
ofdev = to_of_device(dev);
|
|
|
|
|
|
|
|
if (add_uevent_var(envp, num_envp, &i,
|
|
|
|
buffer, buffer_size, &length,
|
|
|
|
"OF_NAME=%s", ofdev->node->name))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
if (add_uevent_var(envp, num_envp, &i,
|
|
|
|
buffer, buffer_size, &length,
|
|
|
|
"OF_TYPE=%s", ofdev->node->type))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
/* Since the compatible field can contain pretty much anything
|
|
|
|
* it's not really legal to split it out with commas. We split it
|
|
|
|
* up using a number of environment variables instead. */
|
|
|
|
|
2007-04-13 15:14:22 +08:00
|
|
|
compat = of_get_property(ofdev->node, "compatible", &cplen);
|
2007-02-13 06:13:25 +08:00
|
|
|
while (compat && *compat && cplen > 0) {
|
|
|
|
if (add_uevent_var(envp, num_envp, &i,
|
|
|
|
buffer, buffer_size, &length,
|
|
|
|
"OF_COMPATIBLE_%d=%s", seen, compat))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
sl = strlen (compat) + 1;
|
|
|
|
compat += sl;
|
|
|
|
cplen -= sl;
|
|
|
|
seen++;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (add_uevent_var(envp, num_envp, &i,
|
|
|
|
buffer, buffer_size, &length,
|
|
|
|
"OF_COMPATIBLE_N=%d", seen))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
/* modalias is trickier, we add it in 2 steps */
|
|
|
|
if (add_uevent_var(envp, num_envp, &i,
|
|
|
|
buffer, buffer_size, &length,
|
|
|
|
"MODALIAS="))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
sl = of_device_get_modalias(ofdev, &buffer[length-1],
|
|
|
|
buffer_size-length);
|
|
|
|
if (sl >= (buffer_size-length))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
length += sl;
|
|
|
|
|
|
|
|
envp[i] = NULL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2006-12-05 08:29:12 +08:00
|
|
|
EXPORT_SYMBOL(of_match_node);
|
2005-10-06 11:22:17 +08:00
|
|
|
EXPORT_SYMBOL(of_match_device);
|
|
|
|
EXPORT_SYMBOL(of_device_register);
|
|
|
|
EXPORT_SYMBOL(of_device_unregister);
|
|
|
|
EXPORT_SYMBOL(of_dev_get);
|
|
|
|
EXPORT_SYMBOL(of_dev_put);
|
|
|
|
EXPORT_SYMBOL(of_release_dev);
|
2007-02-13 06:13:25 +08:00
|
|
|
EXPORT_SYMBOL(of_device_uevent);
|