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authorEric Lapuyade <eric.lapuyade@linux.intel.com>2012-12-18 14:15:49 +0100
committerSamuel Ortiz <sameo@linux.intel.com>2013-01-10 00:51:51 +0100
commitbf71ab8ba53081c28b960d48e0c4cd1c17588aa6 (patch)
treefb6444f45ac21850fa5b7bed05fb19a93b4ee313
parent924d4a023ee6da2e40c78578829e68bcbabee2dd (diff)
downloadop-kernel-dev-bf71ab8ba53081c28b960d48e0c4cd1c17588aa6.zip
op-kernel-dev-bf71ab8ba53081c28b960d48e0c4cd1c17588aa6.tar.gz
NFC: Add HCI quirks to support driver (non)standard implementations
Some chips diverge from the HCI spec in their implementation of standard features. This adds a new quirks parameter to nfc_hci_allocate_device() to let the driver indicate its divergence. Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
-rw-r--r--drivers/nfc/pn544/pn544.c2
-rw-r--r--include/net/nfc/hci.h13
-rw-r--r--net/nfc/hci/command.c7
-rw-r--r--net/nfc/hci/core.c3
4 files changed, 23 insertions, 2 deletions
diff --git a/drivers/nfc/pn544/pn544.c b/drivers/nfc/pn544/pn544.c
index cd8fb16..ece8342 100644
--- a/drivers/nfc/pn544/pn544.c
+++ b/drivers/nfc/pn544/pn544.c
@@ -833,7 +833,7 @@ int pn544_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name,
NFC_PROTO_ISO14443_B_MASK |
NFC_PROTO_NFC_DEP_MASK;
- info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data,
+ info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data, 0,
protocols, llc_name,
phy_headroom + PN544_CMDS_HEADROOM,
phy_tailroom, phy_payload);
diff --git a/include/net/nfc/hci.h b/include/net/nfc/hci.h
index 834e364..2ff7175 100644
--- a/include/net/nfc/hci.h
+++ b/include/net/nfc/hci.h
@@ -82,6 +82,16 @@ typedef int (*xmit) (struct sk_buff *skb, void *cb_data);
#define NFC_HCI_MAX_GATES 256
+/*
+ * These values can be specified by a driver to indicate it requires some
+ * adaptation of the HCI standard.
+ *
+ * NFC_HCI_QUIRK_SHORT_CLEAR - send HCI_ADM_CLEAR_ALL_PIPE cmd with no params
+ */
+enum {
+ NFC_HCI_QUIRK_SHORT_CLEAR = 0,
+};
+
struct nfc_hci_dev {
struct nfc_dev *ndev;
@@ -131,11 +141,14 @@ struct nfc_hci_dev {
u8 *gb;
size_t gb_len;
+
+ unsigned long quirks;
};
/* hci device allocation */
struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
struct nfc_hci_init_data *init_data,
+ unsigned long quirks,
u32 protocols,
const char *llc_name,
int tx_headroom,
diff --git a/net/nfc/hci/command.c b/net/nfc/hci/command.c
index 7d99410..64f922b 100644
--- a/net/nfc/hci/command.c
+++ b/net/nfc/hci/command.c
@@ -280,14 +280,19 @@ static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
{
u8 param[2];
+ size_t param_len = 2;
/* TODO: Find out what the identity reference data is
* and fill param with it. HCI spec 6.1.3.5 */
pr_debug("\n");
+ if (test_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &hdev->quirks))
+ param_len = 0;
+
return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
- NFC_HCI_ADM_CLEAR_ALL_PIPE, param, 2, NULL);
+ NFC_HCI_ADM_CLEAR_ALL_PIPE, param, param_len,
+ NULL);
}
int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate)
diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c
index d9190da..755a6b9 100644
--- a/net/nfc/hci/core.c
+++ b/net/nfc/hci/core.c
@@ -795,6 +795,7 @@ static struct nfc_ops hci_nfc_ops = {
struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
struct nfc_hci_init_data *init_data,
+ unsigned long quirks,
u32 protocols,
const char *llc_name,
int tx_headroom,
@@ -838,6 +839,8 @@ struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
+ hdev->quirks = quirks;
+
return hdev;
}
EXPORT_SYMBOL(nfc_hci_allocate_device);
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