MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol.");
static int w1_timeout = 10;
+static int w1_control_timeout = 1;
int w1_max_slave_count = 10;
int w1_max_slave_ttl = 10;
module_param_named(timeout, w1_timeout, int, 0);
+module_param_named(control_timeout, w1_control_timeout, int, 0);
module_param_named(max_slave_count, w1_max_slave_count, int, 0);
module_param_named(slave_ttl, w1_max_slave_ttl, int, 0);
static int control_needs_exit;
static DECLARE_COMPLETION(w1_control_complete);
-/* stuff for the default family */
-static ssize_t w1_famdefault_read_name(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
- return(sprintf(buf, "%s\n", sl->name));
-}
-static struct w1_family_ops w1_default_fops = {
- .rname = &w1_famdefault_read_name,
-};
-static struct w1_family w1_default_family = {
- .fops = &w1_default_fops,
-};
-
static int w1_master_match(struct device *dev, struct device_driver *drv)
{
return 1;
return -ENODEV;
}
-static int w1_master_remove(struct device *dev)
-{
- return 0;
-}
-
static void w1_master_release(struct device *dev)
{
- struct w1_master *md = container_of(dev, struct w1_master, dev);
+ struct w1_master *md = dev_to_w1_master(dev);
+
+ dev_dbg(dev, "%s: Releasing %s.\n", __func__, md->name);
- complete(&md->dev_released);
+ dev_fini_netlink(md);
+ memset(md, 0, sizeof(struct w1_master) + sizeof(struct w1_bus_master));
+ kfree(md);
}
static void w1_slave_release(struct device *dev)
{
- struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
+ struct w1_slave *sl = dev_to_w1_slave(dev);
+
+ dev_dbg(dev, "%s: Releasing %s.\n", __func__, sl->name);
+
+ while (atomic_read(&sl->refcnt)) {
+ dev_dbg(dev, "Waiting for %s to become free: refcnt=%d.\n",
+ sl->name, atomic_read(&sl->refcnt));
+ if (msleep_interruptible(1000))
+ flush_signals(current);
+ }
+
+ w1_family_put(sl->family);
+ sl->master->slave_count--;
- complete(&sl->dev_released);
+ complete(&sl->released);
}
-static ssize_t w1_default_read_name(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t w1_slave_read_name(struct device *dev, struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "No family registered.\n");
+ struct w1_slave *sl = dev_to_w1_slave(dev);
+
+ return sprintf(buf, "%s\n", sl->name);
}
-static ssize_t w1_default_read_bin(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+static ssize_t w1_slave_read_id(struct kobject *kobj, char *buf, loff_t off, size_t count)
{
- return sprintf(buf, "No family registered.\n");
+ struct w1_slave *sl = kobj_to_w1_slave(kobj);
+
+ atomic_inc(&sl->refcnt);
+ if (off > 8) {
+ count = 0;
+ } else {
+ if (off + count > 8)
+ count = 8 - off;
+
+ memcpy(buf, (u8 *)&sl->reg_num, count);
+ }
+ atomic_dec(&sl->refcnt);
+
+ return count;
}
-static struct device_attribute w1_slave_attribute =
- __ATTR(name, S_IRUGO, w1_default_read_name, NULL);
-
-static struct bin_attribute w1_slave_bin_attribute = {
- .attr = {
- .name = "w1_slave",
- .mode = S_IRUGO,
- .owner = THIS_MODULE,
- },
- .size = W1_SLAVE_DATA_SIZE,
- .read = &w1_default_read_bin,
+static struct device_attribute w1_slave_attr_name =
+ __ATTR(name, S_IRUGO, w1_slave_read_name, NULL);
+
+static struct bin_attribute w1_slave_attr_bin_id = {
+ .attr = {
+ .name = "id",
+ .mode = S_IRUGO,
+ .owner = THIS_MODULE,
+ },
+ .size = 8,
+ .read = w1_slave_read_id,
};
+/* Default family */
+static struct w1_family w1_default_family;
+
static int w1_hotplug(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size);
static struct bus_type w1_bus_type = {
.name = "w1_master_driver",
.bus = &w1_bus_type,
.probe = w1_master_probe,
- .remove = w1_master_remove,
};
struct device w1_master_device = {
.bus = &w1_bus_type,
.bus_id = "w1 bus slave",
.driver = &w1_slave_driver,
+ .release = &w1_slave_release
};
static ssize_t w1_master_attribute_show_name(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct w1_master *md = container_of(dev, struct w1_master, dev);
+ struct w1_master *md = dev_to_w1_master(dev);
ssize_t count;
if (down_interruptible (&md->mutex))
struct device_attribute *attr,
const char * buf, size_t count)
{
- struct w1_master *md = container_of(dev, struct w1_master, dev);
+ struct w1_master *md = dev_to_w1_master(dev);
if (down_interruptible (&md->mutex))
return -EBUSY;
struct device_attribute *attr,
char *buf)
{
- struct w1_master *md = container_of(dev, struct w1_master, dev);
+ struct w1_master *md = dev_to_w1_master(dev);
ssize_t count;
if (down_interruptible (&md->mutex))
static ssize_t w1_master_attribute_show_pointer(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct w1_master *md = container_of(dev, struct w1_master, dev);
+ struct w1_master *md = dev_to_w1_master(dev);
ssize_t count;
if (down_interruptible(&md->mutex))
static ssize_t w1_master_attribute_show_max_slave_count(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct w1_master *md = container_of(dev, struct w1_master, dev);
+ struct w1_master *md = dev_to_w1_master(dev);
ssize_t count;
if (down_interruptible(&md->mutex))
static ssize_t w1_master_attribute_show_attempts(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct w1_master *md = container_of(dev, struct w1_master, dev);
+ struct w1_master *md = dev_to_w1_master(dev);
ssize_t count;
if (down_interruptible(&md->mutex))
static ssize_t w1_master_attribute_show_slave_count(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct w1_master *md = container_of(dev, struct w1_master, dev);
+ struct w1_master *md = dev_to_w1_master(dev);
ssize_t count;
if (down_interruptible(&md->mutex))
static ssize_t w1_master_attribute_show_slaves(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct w1_master *md = container_of(dev, struct w1_master, dev);
+ struct w1_master *md = dev_to_w1_master(dev);
int c = PAGE_SIZE;
if (down_interruptible(&md->mutex))
(unsigned int) sl->reg_num.family,
(unsigned long long) sl->reg_num.id);
- dev_dbg(&sl->dev, "%s: registering %s.\n", __func__,
- &sl->dev.bus_id[0]);
+ dev_dbg(&sl->dev, "%s: registering %s as %p.\n", __func__, &sl->dev.bus_id[0]);
err = device_register(&sl->dev);
if (err < 0) {
return err;
}
- memcpy(&sl->attr_bin, &w1_slave_bin_attribute, sizeof(sl->attr_bin));
- memcpy(&sl->attr_name, &w1_slave_attribute, sizeof(sl->attr_name));
-
- sl->attr_bin.read = sl->family->fops->rbin;
- sl->attr_name.show = sl->family->fops->rname;
+ /* Create "name" entry */
+ err = device_create_file(&sl->dev, &w1_slave_attr_name);
+ if (err < 0) {
+ dev_err(&sl->dev,
+ "sysfs file creation for [%s] failed. err=%d\n",
+ sl->dev.bus_id, err);
+ goto out_unreg;
+ }
- err = device_create_file(&sl->dev, &sl->attr_name);
+ /* Create "id" entry */
+ err = sysfs_create_bin_file(&sl->dev.kobj, &w1_slave_attr_bin_id);
if (err < 0) {
dev_err(&sl->dev,
"sysfs file creation for [%s] failed. err=%d\n",
sl->dev.bus_id, err);
- device_unregister(&sl->dev);
- return err;
+ goto out_rem1;
}
- if ( sl->attr_bin.read ) {
- err = sysfs_create_bin_file(&sl->dev.kobj, &sl->attr_bin);
- if (err < 0) {
- dev_err(&sl->dev,
- "sysfs file creation for [%s] failed. err=%d\n",
- sl->dev.bus_id, err);
- device_remove_file(&sl->dev, &sl->attr_name);
- device_unregister(&sl->dev);
- return err;
- }
+ /* if the family driver needs to initialize something... */
+ if (sl->family->fops && sl->family->fops->add_slave &&
+ ((err = sl->family->fops->add_slave(sl)) < 0)) {
+ dev_err(&sl->dev,
+ "sysfs file creation for [%s] failed. err=%d\n",
+ sl->dev.bus_id, err);
+ goto out_rem2;
}
list_add_tail(&sl->w1_slave_entry, &sl->master->slist);
return 0;
+
+out_rem2:
+ sysfs_remove_bin_file(&sl->dev.kobj, &w1_slave_attr_bin_id);
+out_rem1:
+ device_remove_file(&sl->dev, &w1_slave_attr_name);
+out_unreg:
+ device_unregister(&sl->dev);
+ return err;
}
static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn)
memcpy(&sl->reg_num, rn, sizeof(sl->reg_num));
atomic_set(&sl->refcnt, 0);
- init_completion(&sl->dev_released);
+ init_completion(&sl->released);
spin_lock(&w1_flock);
f = w1_family_registered(rn->family);
{
struct w1_netlink_msg msg;
- dev_info(&sl->dev, "%s: detaching %s.\n", __func__, sl->name);
-
- while (atomic_read(&sl->refcnt)) {
- printk(KERN_INFO "Waiting for %s to become free: refcnt=%d.\n",
- sl->name, atomic_read(&sl->refcnt));
-
- if (msleep_interruptible(1000))
- flush_signals(current);
- }
+ dev_dbg(&sl->dev, "%s: detaching %s [%p].\n", __func__, sl->name, sl);
- if ( sl->attr_bin.read ) {
- sysfs_remove_bin_file (&sl->dev.kobj, &sl->attr_bin);
- }
- device_remove_file(&sl->dev, &sl->attr_name);
- device_unregister(&sl->dev);
- w1_family_put(sl->family);
+ list_del(&sl->w1_slave_entry);
- sl->master->slave_count--;
+ if (sl->family->fops && sl->family->fops->remove_slave)
+ sl->family->fops->remove_slave(sl);
memcpy(&msg.id.id, &sl->reg_num, sizeof(msg.id.id));
msg.type = W1_SLAVE_REMOVE;
w1_netlink_send(sl->master, &msg);
+
+ sysfs_remove_bin_file(&sl->dev.kobj, &w1_slave_attr_bin_id);
+ device_remove_file(&sl->dev, &w1_slave_attr_name);
+ device_unregister(&sl->dev);
+
+ wait_for_completion(&sl->released);
+ kfree(sl);
}
static struct w1_master *w1_search_master(unsigned long data)
spin_lock_bh(&w1_mlock);
list_for_each_entry(dev, &w1_masters, w1_master_entry) {
- dev_info(&dev->dev, "Reconnecting slaves in %s into new family %02x.\n",
+ dev_dbg(&dev->dev, "Reconnecting slaves in %s into new family %02x.\n",
dev->name, f->fid);
set_bit(W1_MASTER_NEED_RECONNECT, &dev->flags);
}
have_to_wait = 0;
try_to_freeze();
- msleep_interruptible(w1_timeout * 1000);
+ msleep_interruptible(w1_control_timeout * 1000);
if (signal_pending(current))
flush_signals(current);
list_del(&dev->w1_master_entry);
spin_unlock_bh(&w1_mlock);
+ down(&dev->mutex);
list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) {
- list_del(&sl->w1_slave_entry);
-
w1_slave_detach(sl);
- kfree(sl);
}
w1_destroy_master_attributes(dev);
+ up(&dev->mutex);
atomic_dec(&dev->refcnt);
continue;
}
if (test_bit(W1_MASTER_NEED_RECONNECT, &dev->flags)) {
- dev_info(&dev->dev, "Reconnecting slaves in device %s.\n", dev->name);
+ dev_dbg(&dev->dev, "Reconnecting slaves in device %s.\n", dev->name);
down(&dev->mutex);
- list_for_each_entry(sl, &dev->slist, w1_slave_entry) {
+ list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) {
if (sl->family->fid == W1_FAMILY_DEFAULT) {
struct w1_reg_num rn;
- list_del(&sl->w1_slave_entry);
- w1_slave_detach(sl);
memcpy(&rn, &sl->reg_num, sizeof(rn));
-
- kfree(sl);
+ w1_slave_detach(sl);
w1_attach_slave_device(dev, &rn);
}
}
+ dev_dbg(&dev->dev, "Reconnecting slaves in device %s has been finished.\n", dev->name);
clear_bit(W1_MASTER_NEED_RECONNECT, &dev->flags);
up(&dev->mutex);
}
list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) {
if (!test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags) && !--sl->ttl) {
- list_del (&sl->w1_slave_entry);
-
- w1_slave_detach (sl);
- kfree (sl);
+ w1_slave_detach(sl);
dev->slave_count--;
} else if (test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags))
projects / firefly-linux-kernel-4.4.55.git / blobdiff