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NFC: Add secure element enablement internal API

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Called via netlink, this API will enable or disable a specific secure
element. When a secure element is enabled, it will handle card emulation
and more generically ISO-DEP target mode, i.e. all target mode cases
except for p2p target mode.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Samuel Ortiz 2013-05-10 16:15:32 +02:00
parent ee656e9d09
commit c531c9ec29
2 changed files with 109 additions and 4 deletions
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110
net/nfc/core.c
View File

@ -528,6 +528,108 @@ error:
return rc;
}
static struct nfc_se *find_se(struct nfc_dev *dev, u32 se_idx)
{
struct nfc_se *se, *n;
list_for_each_entry_safe(se, n, &dev->secure_elements, list)
if (se->idx == se_idx)
return se;
return NULL;
}
int nfc_enable_se(struct nfc_dev *dev, u32 se_idx)
{
struct nfc_se *se;
int rc;
pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
device_lock(&dev->dev);
if (!device_is_registered(&dev->dev)) {
rc = -ENODEV;
goto error;
}
if (!dev->dev_up) {
rc = -ENODEV;
goto error;
}
if (dev->polling) {
rc = -EBUSY;
goto error;
}
if (!dev->ops->enable_se || !dev->ops->disable_se) {
rc = -EOPNOTSUPP;
goto error;
}
se = find_se(dev, se_idx);
if (!se) {
rc = -EINVAL;
goto error;
}
if (se->type == NFC_SE_ENABLED) {
rc = -EALREADY;
goto error;
}
rc = dev->ops->enable_se(dev, se_idx);
error:
device_unlock(&dev->dev);
return rc;
}
int nfc_disable_se(struct nfc_dev *dev, u32 se_idx)
{
struct nfc_se *se;
int rc;
pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
device_lock(&dev->dev);
if (!device_is_registered(&dev->dev)) {
rc = -ENODEV;
goto error;
}
if (!dev->dev_up) {
rc = -ENODEV;
goto error;
}
if (!dev->ops->enable_se || !dev->ops->disable_se) {
rc = -EOPNOTSUPP;
goto error;
}
se = find_se(dev, se_idx);
if (!se) {
rc = -EINVAL;
goto error;
}
if (se->type == NFC_SE_DISABLED) {
rc = -EALREADY;
goto error;
}
rc = dev->ops->disable_se(dev, se_idx);
error:
device_unlock(&dev->dev);
return rc;
}
int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len)
{
pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len);
@ -762,14 +864,14 @@ EXPORT_SYMBOL(nfc_driver_failure);
int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type)
{
struct nfc_se *se, *n;
struct nfc_se *se;
int rc;
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 = find_se(dev, se_idx);
if (se)
return -EALREADY;
se = kzalloc(sizeof(struct nfc_se), GFP_KERNEL);
if (!se)

3
net/nfc/nfc.h
View File

@ -147,4 +147,7 @@ int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx);
int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb,
data_exchange_cb_t cb, void *cb_context);
int nfc_enable_se(struct nfc_dev *dev, u32 se_idx);
int nfc_disable_se(struct nfc_dev *dev, u32 se_idx);
#endif /* __LOCAL_NFC_H */