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NFC: Add firmware upload netlink command

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As several NFC chipsets can have their firmwares upgraded and
reflashed, this patchset adds a new netlink command to trigger
that the driver loads or flashes a new firmware. This will allows
userspace triggered firmware upgrade through netlink.
The firmware name or hint is passed as a parameter, and the driver
will eventually fetch the firmware binary through the request_firmware
API.
The cmd can only be executed when the nfc dev is not in use. Actual
firmware loading/flashing is an asynchronous operation. Result of the
operation shall send a new event up to user space through the nfc dev
multicast socket. During operation, the nfc dev is not openable and
thus not usable.

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 2013-04-29 17:13:27 +02:00 • committed by Samuel Ortiz
commit 9674da8759
5 changed files with 122 additions and 0 deletions
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6
include/uapi/linux/nfc.h
View file

@ -69,6 +69,8 @@
* starting a poll from a device which has a secure element enabled means
* we want to do SE based card emulation.
* @NFC_CMD_DISABLE_SE: Disable the physical link to a specific secure element.
* @NFC_CMD_FW_UPLOAD: Request to Load/flash firmware, or event to inform that
* some firmware was loaded
*/
enum nfc_commands {
NFC_CMD_UNSPEC,
@ -92,6 +94,7 @@ enum nfc_commands {
NFC_CMD_DISABLE_SE,
NFC_CMD_LLC_SDREQ,
NFC_EVENT_LLC_SDRES,
NFC_CMD_FW_UPLOAD,
/* private: internal use only */
__NFC_CMD_AFTER_LAST
};
@ -121,6 +124,7 @@ enum nfc_commands {
* @NFC_ATTR_LLC_PARAM_RW: Receive Window size parameter
* @NFC_ATTR_LLC_PARAM_MIUX: MIU eXtension parameter
* @NFC_ATTR_SE: Available Secure Elements
* @NFC_ATTR_FIRMWARE_NAME: Free format firmware version
*/
enum nfc_attrs {
NFC_ATTR_UNSPEC,
@ -143,6 +147,7 @@ enum nfc_attrs {
NFC_ATTR_LLC_PARAM_MIUX,
NFC_ATTR_SE,
NFC_ATTR_LLC_SDP,
NFC_ATTR_FIRMWARE_NAME,
/* private: internal use only */
__NFC_ATTR_AFTER_LAST
};
@ -162,6 +167,7 @@ enum nfc_sdp_attr {
#define NFC_SENSB_RES_MAXSIZE 12
#define NFC_SENSF_RES_MAXSIZE 18
#define NFC_GB_MAXSIZE 48
#define NFC_FIRMWARE_NAME_MAXSIZE 32
/* NFC protocols */
#define NFC_PROTO_JEWEL 1