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authorThierry Escande <thierry.escande@linux.intel.com>2014-01-06 23:34:37 +0100
committerSamuel Ortiz <sameo@linux.intel.com>2014-01-07 18:48:12 +0100
commit48e1044515967a0d88ee076045b2141535557d8e (patch)
tree564a069a933c1567908725f4a9150c2d7afbb5c4 /net/nfc
parent15203b4c79aaeb443f89ac3190eed3447bf2178b (diff)
NFC: digital: Set current target active on activate_target() call
The curr_protocol field of nfc_digital_dev structure used to determine if a target is currently active was set too soon, immediately when a target is found. This is not good since there is no other way than deactivate_target() to reset curr_protocol and if activate_target() is not called, the target remains active and it's not possible to put the device in poll mode anymore. With this patch curr_protocol is set when nfc core activates a target, puts a device up, or when an ATR_REQ is received in target mode. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/digital_core.c28
-rw-r--r--net/nfc/digital_dep.c2
2 files changed, 28 insertions, 2 deletions
diff --git a/net/nfc/digital_core.c b/net/nfc/digital_core.c
index 09fc95439955..c129d1571ca6 100644
--- a/net/nfc/digital_core.c
+++ b/net/nfc/digital_core.c
@@ -339,7 +339,6 @@ int digital_target_found(struct nfc_digital_dev *ddev,
pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol);
ddev->curr_rf_tech = rf_tech;
- ddev->curr_protocol = protocol;
if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
ddev->skb_add_crc = digital_skb_add_crc_none;
@@ -541,8 +540,14 @@ static int digital_dep_link_up(struct nfc_dev *nfc_dev,
__u8 comm_mode, __u8 *gb, size_t gb_len)
{
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+ int rc;
+
+ rc = digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len);
- return digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len);
+ if (!rc)
+ ddev->curr_protocol = NFC_PROTO_NFC_DEP;
+
+ return rc;
}
static int digital_dep_link_down(struct nfc_dev *nfc_dev)
@@ -557,6 +562,20 @@ static int digital_dep_link_down(struct nfc_dev *nfc_dev)
static int digital_activate_target(struct nfc_dev *nfc_dev,
struct nfc_target *target, __u32 protocol)
{
+ struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+
+ if (ddev->poll_tech_count) {
+ pr_err("Can't activate a target while polling\n");
+ return -EBUSY;
+ }
+
+ if (ddev->curr_protocol) {
+ pr_err("A target is already active\n");
+ return -EBUSY;
+ }
+
+ ddev->curr_protocol = protocol;
+
return 0;
}
@@ -565,6 +584,11 @@ static void digital_deactivate_target(struct nfc_dev *nfc_dev,
{
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+ if (!ddev->curr_protocol) {
+ pr_err("No active target\n");
+ return;
+ }
+
ddev->curr_protocol = 0;
}
diff --git a/net/nfc/digital_dep.c b/net/nfc/digital_dep.c
index 470a0b4016ed..562bec9ad8d9 100644
--- a/net/nfc/digital_dep.c
+++ b/net/nfc/digital_dep.c
@@ -681,6 +681,8 @@ void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg,
ddev->skb_check_crc = digital_skb_check_crc_none;
}
+ ddev->curr_protocol = NFC_PROTO_NFC_DEP_MASK;
+
rc = ddev->skb_check_crc(resp);
if (rc) {
PROTOCOL_ERR("14.4.1.6");

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