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Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/core.c77
-rw-r--r--net/nfc/netlink.c144
-rw-r--r--net/nfc/nfc.h9
3 files changed, 230 insertions, 0 deletions
diff --git a/net/nfc/core.c b/net/nfc/core.c
index f53f88ada687..785f1f20c7ba 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -181,6 +181,83 @@ error:
return rc;
}
+int nfc_dep_link_up(struct nfc_dev *dev, int target_index,
+ u8 comm_mode, u8 rf_mode)
+{
+ int rc = 0;
+
+ pr_debug("dev_name=%s comm:%d rf:%d\n",
+ dev_name(&dev->dev), comm_mode, rf_mode);
+
+ if (!dev->ops->dep_link_up)
+ return -EOPNOTSUPP;
+
+ device_lock(&dev->dev);
+
+ if (!device_is_registered(&dev->dev)) {
+ rc = -ENODEV;
+ goto error;
+ }
+
+ if (dev->dep_link_up == true) {
+ rc = -EALREADY;
+ goto error;
+ }
+
+ rc = dev->ops->dep_link_up(dev, target_index, comm_mode, rf_mode);
+
+error:
+ device_unlock(&dev->dev);
+ return rc;
+}
+
+int nfc_dep_link_down(struct nfc_dev *dev)
+{
+ int rc = 0;
+
+ pr_debug("dev_name=%s\n", dev_name(&dev->dev));
+
+ if (!dev->ops->dep_link_down)
+ return -EOPNOTSUPP;
+
+ device_lock(&dev->dev);
+
+ if (!device_is_registered(&dev->dev)) {
+ rc = -ENODEV;
+ goto error;
+ }
+
+ if (dev->dep_link_up == false) {
+ rc = -EALREADY;
+ goto error;
+ }
+
+ if (dev->dep_rf_mode == NFC_RF_TARGET) {
+ rc = -EOPNOTSUPP;
+ goto error;
+ }
+
+ rc = dev->ops->dep_link_down(dev);
+ if (!rc) {
+ dev->dep_link_up = false;
+ nfc_genl_dep_link_down_event(dev);
+ }
+
+error:
+ device_unlock(&dev->dev);
+ return rc;
+}
+
+int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
+ u8 comm_mode, u8 rf_mode)
+{
+ dev->dep_link_up = true;
+ dev->dep_rf_mode = rf_mode;
+
+ return nfc_genl_dep_link_up_event(dev, target_idx, comm_mode, rf_mode);
+}
+EXPORT_SYMBOL(nfc_dep_link_is_up);
+
/**
* nfc_activate_target - prepare the target for data exchange
*
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 1d76d38c4a24..43a1c47756a7 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -46,6 +46,8 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
[NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
.len = NFC_DEVICE_NAME_MAXSIZE },
[NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
+ [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
+ [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
};
static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
@@ -311,6 +313,75 @@ static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
return 0;
}
+int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
+ u8 comm_mode, u8 rf_mode)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ pr_debug("DEP link is up\n");
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
+ NFC_CMD_DEP_LINK_UP);
+ if (!hdr)
+ goto free_msg;
+
+ NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx);
+ if (rf_mode == NFC_RF_INITIATOR)
+ NLA_PUT_U32(msg, NFC_ATTR_TARGET_INDEX, target_idx);
+ NLA_PUT_U8(msg, NFC_ATTR_COMM_MODE, comm_mode);
+ NLA_PUT_U8(msg, NFC_ATTR_RF_MODE, rf_mode);
+
+ genlmsg_end(msg, hdr);
+
+ dev->dep_link_up = true;
+
+ genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ return -EMSGSIZE;
+}
+
+int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ pr_debug("DEP link is down\n");
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
+ NFC_CMD_DEP_LINK_DOWN);
+ if (!hdr)
+ goto free_msg;
+
+ NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx);
+
+ genlmsg_end(msg, hdr);
+
+ genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ return -EMSGSIZE;
+}
+
static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
@@ -398,6 +469,8 @@ static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
u32 idx;
u32 protocols;
+ pr_debug("Poll start\n");
+
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
!info->attrs[NFC_ATTR_PROTOCOLS])
return -EINVAL;
@@ -452,6 +525,67 @@ out:
return rc;
}
+static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfc_dev *dev;
+ int rc, tgt_idx;
+ u32 idx;
+ u8 comm, rf;
+
+ pr_debug("DEP link up\n");
+
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+ !info->attrs[NFC_ATTR_COMM_MODE] ||
+ !info->attrs[NFC_ATTR_RF_MODE])
+ return -EINVAL;
+
+ idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+ if (!info->attrs[NFC_ATTR_TARGET_INDEX])
+ tgt_idx = NFC_TARGET_IDX_ANY;
+ else
+ tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
+
+ comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
+ rf = nla_get_u8(info->attrs[NFC_ATTR_RF_MODE]);
+
+ if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
+ return -EINVAL;
+
+ if (rf != NFC_RF_INITIATOR && comm != NFC_RF_TARGET)
+ return -EINVAL;
+
+ dev = nfc_get_device(idx);
+ if (!dev)
+ return -ENODEV;
+
+ rc = nfc_dep_link_up(dev, tgt_idx, comm, rf);
+
+ nfc_put_device(dev);
+
+ return rc;
+}
+
+static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfc_dev *dev;
+ int rc;
+ u32 idx;
+
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
+ return -EINVAL;
+
+ idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+
+ dev = nfc_get_device(idx);
+ if (!dev)
+ return -ENODEV;
+
+ rc = nfc_dep_link_down(dev);
+
+ nfc_put_device(dev);
+ return rc;
+}
+
static struct genl_ops nfc_genl_ops[] = {
{
.cmd = NFC_CMD_GET_DEVICE,
@@ -481,6 +615,16 @@ static struct genl_ops nfc_genl_ops[] = {
.policy = nfc_genl_policy,
},
{
+ .cmd = NFC_CMD_DEP_LINK_UP,
+ .doit = nfc_genl_dep_link_up,
+ .policy = nfc_genl_policy,
+ },
+ {
+ .cmd = NFC_CMD_DEP_LINK_DOWN,
+ .doit = nfc_genl_dep_link_down,
+ .policy = nfc_genl_policy,
+ },
+ {
.cmd = NFC_CMD_GET_TARGET,
.dumpit = nfc_genl_dump_targets,
.done = nfc_genl_dump_targets_done,
diff --git a/net/nfc/nfc.h b/net/nfc/nfc.h
index 67d605015304..4d0fb125d033 100644
--- a/net/nfc/nfc.h
+++ b/net/nfc/nfc.h
@@ -68,6 +68,10 @@ int nfc_genl_targets_found(struct nfc_dev *dev);
int nfc_genl_device_added(struct nfc_dev *dev);
int nfc_genl_device_removed(struct nfc_dev *dev);
+int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
+ u8 comm_mode, u8 rf_mode);
+int nfc_genl_dep_link_down_event(struct nfc_dev *dev);
+
struct nfc_dev *nfc_get_device(unsigned idx);
static inline void nfc_put_device(struct nfc_dev *dev)
@@ -102,6 +106,11 @@ int nfc_start_poll(struct nfc_dev *dev, u32 protocols);
int nfc_stop_poll(struct nfc_dev *dev);
+int nfc_dep_link_up(struct nfc_dev *dev, int target_idx,
+ u8 comm_mode, u8 rf_mode);
+
+int nfc_dep_link_down(struct nfc_dev *dev);
+
int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol);
int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-25 01:14:42 +0300