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NFC: Extend netlink interface for LTO, RW, and MIUX parameters support

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NFC_CMD_LLC_GET_PARAMS: request LTO, RW, and MIUX parameters for a device

NFC_CMD_LLC_SET_PARAMS: set one or more of LTO, RW, and MIUX parameters for
a device. LTO must be set before the link is up otherwise -EINPROGRESS is
returned. RW and MIUX can be set at anytime and will be passed in subsequent
CONNECT and CC messages. If one of the passed parameters is wrong none is
set and -EINVAL is returned.

Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Thierry Escande
2012-10-17 14:43:39 +02:00
committed by Samuel Ortiz
parent f31652a58b
commit 52feb444a9
6 changed files with 189 additions and 19 deletions
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14
net/nfc/llcp/llcp.c
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@@ -467,10 +467,9 @@ static u8 nfc_llcp_reserve_sdp_ssap(struct nfc_llcp_local *local)
static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
{
u8 *gb_cur, *version_tlv, version, version_length;
u8 *lto_tlv, lto, lto_length;
u8 *lto_tlv, lto_length;
u8 *wks_tlv, wks_length;
u8 *miux_tlv, miux_length;
__be16 miux;
u8 gb_len = 0;
int ret = 0;
@@ -479,9 +478,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
1, &version_length);
gb_len += version_length;
/* 1500 ms */
lto = 150;
lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &lto, 1, &lto_length);
lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &local->lto, 1, &lto_length);
gb_len += lto_length;
pr_debug("Local wks 0x%lx\n", local->local_wks);
@@ -489,8 +486,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
&wks_length);
gb_len += wks_length;
miux = cpu_to_be16(LLCP_MAX_MIUX);
miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0,
&miux_length);
gb_len += miux_length;
@@ -1383,6 +1379,10 @@ int nfc_llcp_register_device(struct nfc_dev *ndev)
rwlock_init(&local->connecting_sockets.lock);
rwlock_init(&local->raw_sockets.lock);
local->lto = 150; /* 1500 ms */
local->rw = LLCP_MAX_RW;
local->miux = cpu_to_be16(LLCP_MAX_MIUX);
nfc_llcp_build_gb(local);
local->remote_miu = LLCP_DEFAULT_MIU;