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>

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);