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NFC: Add secure elements addition and removal API

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This API will allow NFC drivers to add and remove the secure elements
they know about or detect. Typically this should be called (asynchronously
or not) from the driver or the host interface stack detect_se hook.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Samuel Ortiz
2013-05-10 15:28:38 +02:00
parent 0a946301c2
commit fed7c25ec0
3 changed files with 68 additions and 3 deletions
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45
net/nfc/core.c
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@@ -760,6 +760,49 @@ inline void nfc_driver_failure(struct nfc_dev *dev, int err)
}
EXPORT_SYMBOL(nfc_driver_failure);
int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type)
{
struct nfc_se *se, *n;
pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
list_for_each_entry_safe(se, n, &dev->secure_elements, list)
if (se->idx == se_idx)
return -EALREADY;
se = kzalloc(sizeof(struct nfc_se), GFP_KERNEL);
if (!se)
return -ENOMEM;
se->idx = se_idx;
se->type = type;
se->state = NFC_SE_DISABLED;
INIT_LIST_HEAD(&se->list);
list_add(&se->list, &dev->secure_elements);
return 0;
}
EXPORT_SYMBOL(nfc_add_se);
int nfc_remove_se(struct nfc_dev *dev, u32 se_idx)
{
struct nfc_se *se, *n;
pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
list_for_each_entry_safe(se, n, &dev->secure_elements, list)
if (se->idx == se_idx) {
list_del(&se->list);
kfree(se);
return 0;
}
return -EINVAL;
}
EXPORT_SYMBOL(nfc_remove_se);
static void nfc_release(struct device *d)
{
struct nfc_dev *dev = to_nfc_dev(d);
@@ -856,9 +899,9 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
dev->ops = ops;
dev->supported_protocols = supported_protocols;
dev->active_se = NFC_SE_NONE;
dev->tx_headroom = tx_headroom;
dev->tx_tailroom = tx_tailroom;
INIT_LIST_HEAD(&dev->secure_elements);
nfc_genl_data_init(&dev->genl_data);