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authorIlan Elias <ilane@ti.com>2012-08-15 11:46:24 +0300
committerSamuel Ortiz <sameo@linux.intel.com>2012-09-25 00:17:23 +0200
commit767f19ae698e535f308663c48245fa951abebe20 (patch)
tree98c9353741a371d9c812f81c577fa36e0c4e5451
parentac206838403411e617dbe0e7df1891ee957f1f9a (diff)
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NFC: Implement NCI dep_link_up and dep_link_down
During NFC-DEP target activation, store the remote general bytes to be used later in dep_link_up. When dep_link_up is called, activate the NFC-DEP target, and forward the remote general bytes. When dep_link_down is called, deactivate the target. Signed-off-by: Ilan Elias <ilane@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
-rw-r--r--include/net/nfc/nci_core.h4
-rw-r--r--include/net/nfc/nfc.h1
-rw-r--r--net/nfc/nci/core.c36
-rw-r--r--net/nfc/nci/ntf.c20
4 files changed, 60 insertions, 1 deletions
diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h
index f98674d7baf..d705d867494 100644
--- a/include/net/nfc/nci_core.h
+++ b/include/net/nfc/nci_core.h
@@ -138,6 +138,10 @@ struct nci_dev {
data_exchange_cb_t data_exchange_cb;
void *data_exchange_cb_context;
struct sk_buff *rx_data_reassembly;
+
+ /* stored during intf_activated_ntf */
+ __u8 remote_gb[NFC_MAX_GT_LEN];
+ __u8 remote_gb_len;
};
/* ----- NCI Devices ----- */
diff --git a/include/net/nfc/nfc.h b/include/net/nfc/nfc.h
index 6431f5e3902..7b9f71fa0ea 100644
--- a/include/net/nfc/nfc.h
+++ b/include/net/nfc/nfc.h
@@ -72,6 +72,7 @@ struct nfc_ops {
#define NFC_TARGET_IDX_ANY -1
#define NFC_MAX_GT_LEN 48
+#define NFC_ATR_RES_GT_OFFSET 15
struct nfc_target {
u32 idx;
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index f017b781667..acf9abb7d99 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -564,7 +564,7 @@ static void nci_deactivate_target(struct nfc_dev *nfc_dev,
{
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
- pr_debug("target_idx %d\n", target->idx);
+ pr_debug("entry\n");
if (!ndev->target_active_prot) {
pr_err("unable to deactivate target, no active target\n");
@@ -579,6 +579,38 @@ static void nci_deactivate_target(struct nfc_dev *nfc_dev,
}
}
+
+static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
+ __u8 comm_mode, __u8 *gb, size_t gb_len)
+{
+ struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
+ int rc;
+
+ pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode);
+
+ rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP);
+ if (rc)
+ return rc;
+
+ rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb,
+ ndev->remote_gb_len);
+ if (!rc)
+ rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE,
+ NFC_RF_INITIATOR);
+
+ return rc;
+}
+
+static int nci_dep_link_down(struct nfc_dev *nfc_dev)
+{
+ pr_debug("entry\n");
+
+ nci_deactivate_target(nfc_dev, NULL);
+
+ return 0;
+}
+
+
static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
struct sk_buff *skb,
data_exchange_cb_t cb, void *cb_context)
@@ -612,6 +644,8 @@ static struct nfc_ops nci_nfc_ops = {
.dev_down = nci_dev_down,
.start_poll = nci_start_poll,
.stop_poll = nci_stop_poll,
+ .dep_link_up = nci_dep_link_up,
+ .dep_link_down = nci_dep_link_down,
.activate_target = nci_activate_target,
.deactivate_target = nci_deactivate_target,
.im_transceive = nci_transceive,
diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
index 6e17661a41a..b2aa98ef092 100644
--- a/net/nfc/nci/ntf.c
+++ b/net/nfc/nci/ntf.c
@@ -176,6 +176,8 @@ static int nci_add_new_protocol(struct nci_dev *ndev,
protocol = NFC_PROTO_ISO14443_B_MASK;
else if (rf_protocol == NCI_RF_PROTOCOL_T3T)
protocol = NFC_PROTO_FELICA_MASK;
+ else if (rf_protocol == NCI_RF_PROTOCOL_NFC_DEP)
+ protocol = NFC_PROTO_NFC_DEP_MASK;
else
protocol = 0;
@@ -505,6 +507,24 @@ exit:
/* set the available credits to initial value */
atomic_set(&ndev->credits_cnt, ndev->initial_num_credits);
+
+ /* store general bytes to be reported later in dep_link_up */
+ if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) {
+ ndev->remote_gb_len = 0;
+
+ if (ntf.activation_params_len > 0) {
+ /* ATR_RES general bytes at offset 15 */
+ ndev->remote_gb_len = min_t(__u8,
+ (ntf.activation_params
+ .poll_nfc_dep.atr_res_len
+ - NFC_ATR_RES_GT_OFFSET),
+ NFC_MAX_GT_LEN);
+ memcpy(ndev->remote_gb,
+ (ntf.activation_params.poll_nfc_dep
+ .atr_res + NFC_ATR_RES_GT_OFFSET),
+ ndev->remote_gb_len);
+ }
+ }
}
if (atomic_read(&ndev->state) == NCI_DISCOVERY) {