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NFC: st21nfcb: Configure CLF with NCI proprietary command

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In order to prevent any NFC feature when NFC is disable and
to save power, (down to 4uA) put the CLF in hibernate mode
with RF deactivated.
Add the equivalent to enable the NFC feature when initiating
the st21nfcb driver.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Christophe Ricard 2015-06-06 13:16:52 +02:00 committed by Samuel Ortiz
parent 05f0939f76
commit 41fc2f50a7
3 changed files with 29 additions and 1 deletions
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12
drivers/nfc/st21nfcb/ndlc.c
View File

@ -66,9 +66,19 @@ EXPORT_SYMBOL(ndlc_open);
void ndlc_close(struct llt_ndlc *ndlc)
{
struct nci_mode_set_cmd cmd;
cmd.cmd_type = ST21NFCB_NCI_SET_NFC_MODE;
cmd.mode = 0;
/* toggle reset pin */
ndlc->ops->disable(ndlc->phy_id);
ndlc->ops->enable(ndlc->phy_id);
nci_prop_cmd(ndlc->ndev, ST21NFCB_NCI_CORE_PROP,
sizeof(struct nci_mode_set_cmd), (__u8 *)&cmd);
ndlc->powered = 0;
ndlc->ops->disable(ndlc->phy_id);
}
EXPORT_SYMBOL(ndlc_close);

12
drivers/nfc/st21nfcb/st21nfcb.c
View File

@ -30,6 +30,17 @@
#define ST21NFCB_NCI1_X_PROPRIETARY_ISO15693 0x83
static int st21nfcb_nci_init(struct nci_dev *ndev)
{
struct nci_mode_set_cmd cmd;
cmd.cmd_type = ST21NFCB_NCI_SET_NFC_MODE;
cmd.mode = 1;
return nci_prop_cmd(ndev, ST21NFCB_NCI_CORE_PROP,
sizeof(struct nci_mode_set_cmd), (__u8 *)&cmd);
}
static int st21nfcb_nci_open(struct nci_dev *ndev)
{
struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
@ -96,6 +107,7 @@ static struct nci_prop_ops st21nfcb_nci_prop_ops[] = {
};
static struct nci_ops st21nfcb_nci_ops = {
.init = st21nfcb_nci_init,
.open = st21nfcb_nci_open,
.close = st21nfcb_nci_close,
.send = st21nfcb_nci_send,

6
drivers/nfc/st21nfcb/st21nfcb.h
View File

@ -26,6 +26,12 @@
#define ST21NFCB_NCI_RUNNING 1
#define ST21NFCB_NCI_CORE_PROP 0x01
#define ST21NFCB_NCI_SET_NFC_MODE 0x02
struct nci_mode_set_cmd {
u8 cmd_type;
u8 mode;
} __packed;
struct nci_mode_set_rsp {
u8 status;