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authorEric Lapuyade <eric.lapuyade@linux.intel.com>2013-07-19 16:57:13 +0400
committerSamuel Ortiz <sameo@linux.intel.com>2013-08-14 03:08:12 +0400
commiteab10b71a7d62d7cc6db631dba448f1d84df9b53 (patch)
tree96c4c697aaab1da7cce768945365e07bcf3fe63d /drivers/nfc
parentef04158e13e827315680cf8449d9af3bd8dc6280 (diff)
downloadlinux-eab10b71a7d62d7cc6db631dba448f1d84df9b53.tar.xz
NFC: pn544: i2c: Add firmware download mode power-on support
This is in preparation for pn544-i2c firmware download feature, where we need to know if we're in regular or firmware upload mode. Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc')
-rw-r--r--drivers/nfc/pn544/i2c.c14
-rw-r--r--drivers/nfc/pn544/pn544.c3
-rw-r--r--drivers/nfc/pn544/pn544.h3
3 files changed, 14 insertions, 6 deletions
diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
index 8cf64c19f022..e09c8982596c 100644
--- a/drivers/nfc/pn544/i2c.c
+++ b/drivers/nfc/pn544/i2c.c
@@ -65,6 +65,7 @@ struct pn544_i2c_phy {
unsigned int en_polarity;
int powered;
+ int run_mode;
int hard_fault; /*
* < 0 if hardware error occured (e.g. i2c err)
@@ -122,15 +123,22 @@ out:
gpio_set_value(phy->gpio_en, !phy->en_polarity);
}
+static void pn544_hci_i2c_enable_mode(struct pn544_i2c_phy *phy, int run_mode)
+{
+ gpio_set_value(phy->gpio_fw, run_mode == PN544_FW_MODE ? 1 : 0);
+ gpio_set_value(phy->gpio_en, phy->en_polarity);
+ usleep_range(10000, 15000);
+
+ phy->run_mode = run_mode;
+}
+
static int pn544_hci_i2c_enable(void *phy_id)
{
struct pn544_i2c_phy *phy = phy_id;
pr_info(DRIVER_DESC ": %s\n", __func__);
- gpio_set_value(phy->gpio_fw, 0);
- gpio_set_value(phy->gpio_en, phy->en_polarity);
- usleep_range(10000, 15000);
+ pn544_hci_i2c_enable_mode(phy, PN544_HCI_MODE);
phy->powered = 1;
diff --git a/drivers/nfc/pn544/pn544.c b/drivers/nfc/pn544/pn544.c
index 0d17da7675b7..1d4b38c036fb 100644
--- a/drivers/nfc/pn544/pn544.c
+++ b/drivers/nfc/pn544/pn544.c
@@ -31,9 +31,6 @@
/* Timing restrictions (ms) */
#define PN544_HCI_RESETVEN_TIME 30
-#define HCI_MODE 0
-#define FW_MODE 1
-
enum pn544_state {
PN544_ST_COLD,
PN544_ST_FW_READY,
diff --git a/drivers/nfc/pn544/pn544.h b/drivers/nfc/pn544/pn544.h
index f47c6454914b..d689f0ac64aa 100644
--- a/drivers/nfc/pn544/pn544.h
+++ b/drivers/nfc/pn544/pn544.h
@@ -24,6 +24,9 @@
#define DRIVER_DESC "HCI NFC driver for PN544"
+#define PN544_HCI_MODE 0
+#define PN544_FW_MODE 1
+
int pn544_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name,
int phy_headroom, int phy_tailroom, int phy_payload,
struct nfc_hci_dev **hdev);