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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: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Samuel Ortiz 2012-05-29 21:34:08 +02:00
parent 9f2f8ba172
commit 34a85bfcfb
1 changed files with 25 additions and 0 deletions
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25
drivers/nfc/pn533.c
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@ -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: