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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>
This commit is contained in:
Eric Lapuyade 2013-07-19 14:57:13 +02:00 committed by Samuel Ortiz
parent ef04158e13
commit eab10b71a7
3 changed files with 14 additions and 6 deletions
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14
drivers/nfc/pn544/i2c.c
View File

@ -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;

3
drivers/nfc/pn544/pn544.c
View File

@ -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,

3
drivers/nfc/pn544/pn544.h
View File

@ -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);