Commit 34a85bfc authored by Samuel Ortiz's avatar Samuel Ortiz
Browse files

NFC: Configure pn533 RF timings 



Those define the ATR_RES response timeout after which the pn533 considers the
target to be mute.

Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 9f2f8ba1

drivers/nfc/pn533.c

+25 −0
Original line number Diff line number Diff line
@@ -104,8 +104,14 @@ struct pn533_fw_version { 
};



/* PN533_CMD_RF_CONFIGURATION */

#define PN533_CFGITEM_TIMING 0x02

#define PN533_CFGITEM_MAX_RETRIES 0x05



#define PN533_CONFIG_TIMING_102 0xb

#define PN533_CONFIG_TIMING_204 0xc

#define PN533_CONFIG_TIMING_409 0xd

#define PN533_CONFIG_TIMING_819 0xe



#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00

#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
@@ -115,6 +121,12 @@ struct pn533_config_max_retries { 
	u8 mx_rty_passive_act;

} __packed;



struct pn533_config_timing {

	u8 rfu;

	u8 atr_res_timeout;

	u8 dep_timeout;

} __packed;



/* PN533_CMD_IN_LIST_PASSIVE_TARGET */



/* felica commands opcode */
@@ -2004,6 +2016,7 @@ static int pn533_probe(struct usb_interface *interface, 
	struct usb_host_interface *iface_desc;

	struct usb_endpoint_descriptor *endpoint;

	struct pn533_config_max_retries max_retries;

	struct pn533_config_timing timing;

	int in_endpoint = 0;

	int out_endpoint = 0;

	int rc = -ENOMEM;
@@ -2115,6 +2128,18 @@ static int pn533_probe(struct usb_interface *interface, 
		goto unregister_nfc_dev;

	}



	timing.rfu = PN533_CONFIG_TIMING_102;

	timing.atr_res_timeout = PN533_CONFIG_TIMING_204;

	timing.dep_timeout = PN533_CONFIG_TIMING_409;



	rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,

				(u8 *) &timing, sizeof(timing));

	if (rc) {

		nfc_dev_err(&dev->interface->dev,

			    "Error on setting RF timings");

		goto unregister_nfc_dev;

	}



	return 0;



unregister_nfc_dev: