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author | Eric Lapuyade <eric.lapuyade@linux.intel.com> | 2013-04-29 17:13:27 +0200 |
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committer | Samuel Ortiz <sameo@linux.intel.com> | 2013-06-14 00:26:08 +0200 |
commit | 9674da8759df0d6c0d24e1ede6e2a1acdef91e3c (patch) | |
tree | 97363dfcf38f1e7c6bfb8a9abd76302c617eb705 /net/nfc/netlink.c | |
parent | 1095e69f47926db6f1350a9d6a38626521580e87 (diff) | |
download | op-kernel-dev-9674da8759df0d6c0d24e1ede6e2a1acdef91e3c.zip op-kernel-dev-9674da8759df0d6c0d24e1ede6e2a1acdef91e3c.tar.gz |
NFC: Add firmware upload netlink command
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>
Diffstat (limited to 'net/nfc/netlink.c')
-rw-r--r-- | net/nfc/netlink.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index f0c4d61..1deadad 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -56,6 +56,8 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 }, [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 }, [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED }, + [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING, + .len = NFC_FIRMWARE_NAME_MAXSIZE }, }; static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = { @@ -1025,6 +1027,62 @@ exit: return rc; } +static int nfc_genl_fw_upload(struct sk_buff *skb, struct genl_info *info) +{ + struct nfc_dev *dev; + int rc; + u32 idx; + char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) + return -EINVAL; + + idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); + + dev = nfc_get_device(idx); + if (!dev) + return -ENODEV; + + nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME], + sizeof(firmware_name)); + + rc = nfc_fw_upload(dev, firmware_name); + + nfc_put_device(dev); + return rc; +} + +int nfc_genl_fw_upload_done(struct nfc_dev *dev, const char *firmware_name) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_CMD_FW_UPLOAD); + if (!hdr) + goto free_msg; + + if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) || + nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + return -EMSGSIZE; +} + static struct genl_ops nfc_genl_ops[] = { { .cmd = NFC_CMD_GET_DEVICE, @@ -1084,6 +1142,11 @@ static struct genl_ops nfc_genl_ops[] = { .doit = nfc_genl_llc_sdreq, .policy = nfc_genl_policy, }, + { + .cmd = NFC_CMD_FW_UPLOAD, + .doit = nfc_genl_fw_upload, + .policy = nfc_genl_policy, + }, }; |