[deliverable/linux.git] / net / nfc / hci / command.c

/*
 * Copyright (C) 2012  Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#define pr_fmt(fmt) "hci: %s: " fmt, __func__

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/module.h>

#include <net/nfc/hci.h>

#include "hci.h"

static int nfc_hci_execute_cmd_async(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
			       const u8 *param, size_t param_len,
			       data_exchange_cb_t cb, void *cb_context)
{
	pr_debug("exec cmd async through pipe=%d, cmd=%d, plen=%zd\n", pipe,
		 cmd, param_len);

	/* TODO: Define hci cmd execution delay. Should it be the same
	 * for all commands?
	 */
	return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_COMMAND, cmd,
				      param, param_len, cb, cb_context, 3000);
}

/*
 * HCI command execution completion callback.
 * err will be a standard linux error (may be converted from HCI response)
 * skb contains the response data and must be disposed, or may be NULL if
 * an error occured
 */
static void nfc_hci_execute_cb(void *context, struct sk_buff *skb, int err)
{
	struct hcp_exec_waiter *hcp_ew = (struct hcp_exec_waiter *)context;

	pr_debug("HCI Cmd completed with result=%d\n", err);

	hcp_ew->exec_result = err;
	if (hcp_ew->exec_result == 0)
		hcp_ew->result_skb = skb;
	else
		kfree_skb(skb);
	hcp_ew->exec_complete = true;

	wake_up(hcp_ew->wq);
}

static int nfc_hci_execute_cmd(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
			       const u8 *param, size_t param_len,
			       struct sk_buff **skb)
{
	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(ew_wq);
	struct hcp_exec_waiter hcp_ew;
	hcp_ew.wq = &ew_wq;
	hcp_ew.exec_complete = false;
	hcp_ew.result_skb = NULL;

	pr_debug("exec cmd sync through pipe=%d, cmd=%d, plen=%zd\n", pipe,
		 cmd, param_len);

	/* TODO: Define hci cmd execution delay. Should it be the same
	 * for all commands?
	 */
	hcp_ew.exec_result = nfc_hci_hcp_message_tx(hdev, pipe,
						    NFC_HCI_HCP_COMMAND, cmd,
						    param, param_len,
						    nfc_hci_execute_cb, &hcp_ew,
						    3000);
	if (hcp_ew.exec_result < 0)
		return hcp_ew.exec_result;

	wait_event(ew_wq, hcp_ew.exec_complete == true);

	if (hcp_ew.exec_result == 0) {
		if (skb)
			*skb = hcp_ew.result_skb;
		else
			kfree_skb(hcp_ew.result_skb);
	}

	return hcp_ew.exec_result;
}

int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
		       const u8 *param, size_t param_len)
{
	u8 pipe;

	pr_debug("%d to gate %d\n", event, gate);

	pipe = hdev->gate2pipe[gate];
	if (pipe == NFC_HCI_INVALID_PIPE)
		return -EADDRNOTAVAIL;

	return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_EVENT, event,
				      param, param_len, NULL, NULL, 0);
}
EXPORT_SYMBOL(nfc_hci_send_event);

int nfc_hci_send_response(struct nfc_hci_dev *hdev, u8 gate, u8 response,
			  const u8 *param, size_t param_len)
{
	u8 pipe;

	pr_debug("\n");

	pipe = hdev->gate2pipe[gate];
	if (pipe == NFC_HCI_INVALID_PIPE)
		return -EADDRNOTAVAIL;

	return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_RESPONSE,
				      response, param, param_len, NULL, NULL,
				      0);
}
EXPORT_SYMBOL(nfc_hci_send_response);

/*
 * Execute an hci command sent to gate.
 * skb will contain response data if success. skb can be NULL if you are not
 * interested by the response.
 */
int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
		     const u8 *param, size_t param_len, struct sk_buff **skb)
{
	u8 pipe;

	pr_debug("\n");

	pipe = hdev->gate2pipe[gate];
	if (pipe == NFC_HCI_INVALID_PIPE)
		return -EADDRNOTAVAIL;

	return nfc_hci_execute_cmd(hdev, pipe, cmd, param, param_len, skb);
}
EXPORT_SYMBOL(nfc_hci_send_cmd);

int nfc_hci_send_cmd_async(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
			   const u8 *param, size_t param_len,
			   data_exchange_cb_t cb, void *cb_context)
{
	u8 pipe;

	pr_debug("\n");

	pipe = hdev->gate2pipe[gate];
	if (pipe == NFC_HCI_INVALID_PIPE)
		return -EADDRNOTAVAIL;

	return nfc_hci_execute_cmd_async(hdev, pipe, cmd, param, param_len,
					 cb, cb_context);
}
EXPORT_SYMBOL(nfc_hci_send_cmd_async);

int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
		      const u8 *param, size_t param_len)
{
	int r;
	u8 *tmp;

	/* TODO ELa: reg idx must be inserted before param, but we don't want
	 * to ask the caller to do it to keep a simpler API.
	 * For now, just create a new temporary param buffer. This is far from
	 * optimal though, and the plan is to modify APIs to pass idx down to
	 * nfc_hci_hcp_message_tx where the frame is actually built, thereby
	 * eliminating the need for the temp allocation-copy here.
	 */

	pr_debug("idx=%d to gate %d\n", idx, gate);

	tmp = kmalloc(1 + param_len, GFP_KERNEL);
	if (tmp == NULL)
		return -ENOMEM;

	*tmp = idx;
	memcpy(tmp + 1, param, param_len);

	r = nfc_hci_send_cmd(hdev, gate, NFC_HCI_ANY_SET_PARAMETER,
			     tmp, param_len + 1, NULL);

	kfree(tmp);

	return r;
}
EXPORT_SYMBOL(nfc_hci_set_param);

int nfc_hci_get_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
		      struct sk_buff **skb)
{
	pr_debug("gate=%d regidx=%d\n", gate, idx);

	return nfc_hci_send_cmd(hdev, gate, NFC_HCI_ANY_GET_PARAMETER,
				&idx, 1, skb);
}
EXPORT_SYMBOL(nfc_hci_get_param);

static int nfc_hci_open_pipe(struct nfc_hci_dev *hdev, u8 pipe)
{
	struct sk_buff *skb;
	int r;

	pr_debug("pipe=%d\n", pipe);

	r = nfc_hci_execute_cmd(hdev, pipe, NFC_HCI_ANY_OPEN_PIPE,
				NULL, 0, &skb);
	if (r == 0) {
		/* dest host other than host controller will send
		 * number of pipes already open on this gate before
		 * execution. The number can be found in skb->data[0]
		 */
		kfree_skb(skb);
	}

	return r;
}

static int nfc_hci_close_pipe(struct nfc_hci_dev *hdev, u8 pipe)
{
	pr_debug("\n");

	return nfc_hci_execute_cmd(hdev, pipe, NFC_HCI_ANY_CLOSE_PIPE,
				   NULL, 0, NULL);
}

static u8 nfc_hci_create_pipe(struct nfc_hci_dev *hdev, u8 dest_host,
			      u8 dest_gate, int *result)
{
	struct sk_buff *skb;
	struct hci_create_pipe_params params;
	struct hci_create_pipe_resp *resp;
	u8 pipe;

	pr_debug("gate=%d\n", dest_gate);

	params.src_gate = NFC_HCI_ADMIN_GATE;
	params.dest_host = dest_host;
	params.dest_gate = dest_gate;

	*result = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
				      NFC_HCI_ADM_CREATE_PIPE,
				      (u8 *) &params, sizeof(params), &skb);
	if (*result < 0)
		return NFC_HCI_INVALID_PIPE;

	resp = (struct hci_create_pipe_resp *)skb->data;
	pipe = resp->pipe;
	kfree_skb(skb);

	pr_debug("pipe created=%d\n", pipe);

	return pipe;
}

static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
{
	pr_debug("\n");

	return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
				   NFC_HCI_ADM_DELETE_PIPE, &pipe, 1, NULL);
}

static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
{
	u8 param[2];
	size_t param_len = 2;

	/* TODO: Find out what the identity reference data is
	 * and fill param with it. HCI spec 6.1.3.5 */

	pr_debug("\n");

	if (test_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &hdev->quirks))
		param_len = 0;

	return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
				   NFC_HCI_ADM_CLEAR_ALL_PIPE, param, param_len,
				   NULL);
}

int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate)
{
	int r;
	u8 pipe = hdev->gate2pipe[gate];

	pr_debug("\n");

	if (pipe == NFC_HCI_INVALID_PIPE)
		return -EADDRNOTAVAIL;

	r = nfc_hci_close_pipe(hdev, pipe);
	if (r < 0)
		return r;

	if (pipe != NFC_HCI_LINK_MGMT_PIPE && pipe != NFC_HCI_ADMIN_PIPE) {
		r = nfc_hci_delete_pipe(hdev, pipe);
		if (r < 0)
			return r;
	}

	hdev->gate2pipe[gate] = NFC_HCI_INVALID_PIPE;

	return 0;
}
EXPORT_SYMBOL(nfc_hci_disconnect_gate);

int nfc_hci_disconnect_all_gates(struct nfc_hci_dev *hdev)
{
	int r;

	pr_debug("\n");

	r = nfc_hci_clear_all_pipes(hdev);
	if (r < 0)
		return r;

	memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));

	return 0;
}
EXPORT_SYMBOL(nfc_hci_disconnect_all_gates);

int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate,
			 u8 pipe)
{
	bool pipe_created = false;
	int r;

	pr_debug("\n");

	if (hdev->gate2pipe[dest_gate] != NFC_HCI_INVALID_PIPE)
		return -EADDRINUSE;

	if (pipe != NFC_HCI_INVALID_PIPE)
		goto open_pipe;

	switch (dest_gate) {
	case NFC_HCI_LINK_MGMT_GATE:
		pipe = NFC_HCI_LINK_MGMT_PIPE;
		break;
	case NFC_HCI_ADMIN_GATE:
		pipe = NFC_HCI_ADMIN_PIPE;
		break;
	default:
		pipe = nfc_hci_create_pipe(hdev, dest_host, dest_gate, &r);
		if (pipe == NFC_HCI_INVALID_PIPE)
			return r;
		pipe_created = true;
		break;
	}

open_pipe:
	r = nfc_hci_open_pipe(hdev, pipe);
	if (r < 0) {
		if (pipe_created)
			if (nfc_hci_delete_pipe(hdev, pipe) < 0) {
				/* TODO: Cannot clean by deleting pipe...
				 * -> inconsistent state */
			}
		return r;
	}

	hdev->gate2pipe[dest_gate] = pipe;

	return 0;
}
EXPORT_SYMBOL(nfc_hci_connect_gate);
Commit	Line	Data
8b8d2e08 EL	1	/*
	2	* Copyright (C) 2012 Intel Corporation. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; either version 2 of the License, or
	7	* (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
98b32dec	15	* along with this program; if not, see <http://www.gnu.org/licenses/>.
8b8d2e08 EL	16	*/
	17
	18	#define pr_fmt(fmt) "hci: %s: " fmt, __func__
	19
	20	#include <linux/init.h>
	21	#include <linux/kernel.h>
	22	#include <linux/sched.h>
	23	#include <linux/module.h>
	24
	25	#include <net/nfc/hci.h>
	26
	27	#include "hci.h"
	28
e4c4789e EL	29	static int nfc_hci_execute_cmd_async(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
	30	const u8 *param, size_t param_len,
	31	data_exchange_cb_t cb, void *cb_context)
	32	{
	33	pr_debug("exec cmd async through pipe=%d, cmd=%d, plen=%zd\n", pipe,
	34	cmd, param_len);
	35
	36	/* TODO: Define hci cmd execution delay. Should it be the same
	37	* for all commands?
	38	*/
	39	return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_COMMAND, cmd,
	40	param, param_len, cb, cb_context, 3000);
	41	}
	42
b5faa648 EL	43	/*
	44	* HCI command execution completion callback.
	45	* err will be a standard linux error (may be converted from HCI response)
	46	* skb contains the response data and must be disposed, or may be NULL if
	47	* an error occured
	48	*/
	49	static void nfc_hci_execute_cb(void context, struct sk_buff skb, int err)
8b8d2e08	50	{
b5faa648	51	struct hcp_exec_waiter hcp_ew = (struct hcp_exec_waiter )context;
8b8d2e08	52
6c1c5b9e	53	pr_debug("HCI Cmd completed with result=%d\n", err);
8b8d2e08	54
6c1c5b9e	55	hcp_ew->exec_result = err;
8b8d2e08 EL	56	if (hcp_ew->exec_result == 0)
	57	hcp_ew->result_skb = skb;
	58	else
	59	kfree_skb(skb);
	60	hcp_ew->exec_complete = true;
	61
	62	wake_up(hcp_ew->wq);
	63	}
	64
	65	static int nfc_hci_execute_cmd(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
	66	const u8 *param, size_t param_len,
	67	struct sk_buff **skb)
	68	{
	69	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(ew_wq);
	70	struct hcp_exec_waiter hcp_ew;
	71	hcp_ew.wq = &ew_wq;
	72	hcp_ew.exec_complete = false;
	73	hcp_ew.result_skb = NULL;
	74
e4c4789e EL	75	pr_debug("exec cmd sync through pipe=%d, cmd=%d, plen=%zd\n", pipe,
e4c4789e EL	76	cmd, param_len);
8b8d2e08 EL	77
	78	/* TODO: Define hci cmd execution delay. Should it be the same
	79	* for all commands?
	80	*/
	81	hcp_ew.exec_result = nfc_hci_hcp_message_tx(hdev, pipe,
	82	NFC_HCI_HCP_COMMAND, cmd,
	83	param, param_len,
	84	nfc_hci_execute_cb, &hcp_ew,
	85	3000);
	86	if (hcp_ew.exec_result < 0)
	87	return hcp_ew.exec_result;
	88
	89	wait_event(ew_wq, hcp_ew.exec_complete == true);
	90
	91	if (hcp_ew.exec_result == 0) {
	92	if (skb)
	93	*skb = hcp_ew.result_skb;
	94	else
	95	kfree_skb(hcp_ew.result_skb);
	96	}
	97
	98	return hcp_ew.exec_result;
	99	}
	100
	101	int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
	102	const u8 *param, size_t param_len)
	103	{
	104	u8 pipe;
	105
	106	pr_debug("%d to gate %d\n", event, gate);
	107
	108	pipe = hdev->gate2pipe[gate];
	109	if (pipe == NFC_HCI_INVALID_PIPE)
	110	return -EADDRNOTAVAIL;
	111
	112	return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_EVENT, event,
	113	param, param_len, NULL, NULL, 0);
	114	}
	115	EXPORT_SYMBOL(nfc_hci_send_event);
	116
	117	int nfc_hci_send_response(struct nfc_hci_dev *hdev, u8 gate, u8 response,
	118	const u8 *param, size_t param_len)
	119	{
	120	u8 pipe;
	121
	122	pr_debug("\n");
	123
	124	pipe = hdev->gate2pipe[gate];
	125	if (pipe == NFC_HCI_INVALID_PIPE)
	126	return -EADDRNOTAVAIL;
	127
	128	return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_RESPONSE,
	129	response, param, param_len, NULL, NULL,
	130	0);
	131	}
	132	EXPORT_SYMBOL(nfc_hci_send_response);
	133
	134	/*
	135	* Execute an hci command sent to gate.
	136	* skb will contain response data if success. skb can be NULL if you are not
	137	* interested by the response.
	138	*/
	139	int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
	140	const u8 param, size_t param_len, struct sk_buff *skb)
141	{
142	u8 pipe;
143
144	pr_debug("\n");
145
146	pipe = hdev->gate2pipe[gate];
147	if (pipe == NFC_HCI_INVALID_PIPE)
148	return -EADDRNOTAVAIL;
149
150	return nfc_hci_execute_cmd(hdev, pipe, cmd, param, param_len, skb);
151	}
152	EXPORT_SYMBOL(nfc_hci_send_cmd);
153
e4c4789e EL	154	int nfc_hci_send_cmd_async(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
	155	const u8 *param, size_t param_len,
	156	data_exchange_cb_t cb, void *cb_context)
	157	{
	158	u8 pipe;
	159
	160	pr_debug("\n");
	161
	162	pipe = hdev->gate2pipe[gate];
	163	if (pipe == NFC_HCI_INVALID_PIPE)
	164	return -EADDRNOTAVAIL;
	165
	166	return nfc_hci_execute_cmd_async(hdev, pipe, cmd, param, param_len,
	167	cb, cb_context);
	168	}
	169	EXPORT_SYMBOL(nfc_hci_send_cmd_async);
	170
8b8d2e08 EL	171	int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
	172	const u8 *param, size_t param_len)
	173	{
	174	int r;
	175	u8 *tmp;
	176
	177	/* TODO ELa: reg idx must be inserted before param, but we don't want
	178	* to ask the caller to do it to keep a simpler API.
	179	* For now, just create a new temporary param buffer. This is far from
	180	* optimal though, and the plan is to modify APIs to pass idx down to
	181	* nfc_hci_hcp_message_tx where the frame is actually built, thereby
	182	* eliminating the need for the temp allocation-copy here.
	183	*/
	184
	185	pr_debug("idx=%d to gate %d\n", idx, gate);
	186
	187	tmp = kmalloc(1 + param_len, GFP_KERNEL);
	188	if (tmp == NULL)
	189	return -ENOMEM;
	190
	191	*tmp = idx;
	192	memcpy(tmp + 1, param, param_len);
	193
	194	r = nfc_hci_send_cmd(hdev, gate, NFC_HCI_ANY_SET_PARAMETER,
	195	tmp, param_len + 1, NULL);
	196
	197	kfree(tmp);
	198
	199	return r;
	200	}
	201	EXPORT_SYMBOL(nfc_hci_set_param);
	202
	203	int nfc_hci_get_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
	204	struct sk_buff **skb)
	205	{
	206	pr_debug("gate=%d regidx=%d\n", gate, idx);
	207
	208	return nfc_hci_send_cmd(hdev, gate, NFC_HCI_ANY_GET_PARAMETER,
	209	&idx, 1, skb);
	210	}
	211	EXPORT_SYMBOL(nfc_hci_get_param);
	212
	213	static int nfc_hci_open_pipe(struct nfc_hci_dev *hdev, u8 pipe)
	214	{
	215	struct sk_buff *skb;
	216	int r;
	217
	218	pr_debug("pipe=%d\n", pipe);
	219
	220	r = nfc_hci_execute_cmd(hdev, pipe, NFC_HCI_ANY_OPEN_PIPE,
	221	NULL, 0, &skb);
	222	if (r == 0) {
	223	/* dest host other than host controller will send
	224	* number of pipes already open on this gate before
	225	* execution. The number can be found in skb->data[0]
	226	*/
	227	kfree_skb(skb);
	228	}
	229
	230	return r;
	231	}
	232
	233	static int nfc_hci_close_pipe(struct nfc_hci_dev *hdev, u8 pipe)
	234	{
235	pr_debug("\n");
236
237	return nfc_hci_execute_cmd(hdev, pipe, NFC_HCI_ANY_CLOSE_PIPE,
238	NULL, 0, NULL);
239	}
240
241	static u8 nfc_hci_create_pipe(struct nfc_hci_dev *hdev, u8 dest_host,
242	u8 dest_gate, int *result)
243	{
244	struct sk_buff *skb;
245	struct hci_create_pipe_params params;
246	struct hci_create_pipe_resp *resp;
247	u8 pipe;
248
249	pr_debug("gate=%d\n", dest_gate);
250
251	params.src_gate = NFC_HCI_ADMIN_GATE;
252	params.dest_host = dest_host;
253	params.dest_gate = dest_gate;
254
255	*result = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
256	NFC_HCI_ADM_CREATE_PIPE,
257	(u8 *) &params, sizeof(params), &skb);
80e4232e SJ	258	if (*result < 0)
80e4232e SJ	259	return NFC_HCI_INVALID_PIPE;
8b8d2e08	260
80e4232e SJ	261	resp = (struct hci_create_pipe_resp *)skb->data;
	262	pipe = resp->pipe;
	263	kfree_skb(skb);
8b8d2e08	264
80e4232e SJ	265	pr_debug("pipe created=%d\n", pipe);
	266
	267	return pipe;
8b8d2e08 EL	268	}
	269
	270	static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
	271	{
	272	pr_debug("\n");
	273
	274	return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
	275	NFC_HCI_ADM_DELETE_PIPE, &pipe, 1, NULL);
	276	}
	277
	278	static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
	279	{
8b8d2e08	280	u8 param[2];
bf71ab8b	281	size_t param_len = 2;
8b8d2e08 EL	282
	283	/* TODO: Find out what the identity reference data is
	284	* and fill param with it. HCI spec 6.1.3.5 */
	285
	286	pr_debug("\n");
	287
bf71ab8b EL	288	if (test_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &hdev->quirks))
	289	param_len = 0;
	290
0250ffc5	291	return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
bf71ab8b EL	292	NFC_HCI_ADM_CLEAR_ALL_PIPE, param, param_len,
bf71ab8b EL	293	NULL);
8b8d2e08 EL	294	}
	295
	296	int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate)
	297	{
	298	int r;
	299	u8 pipe = hdev->gate2pipe[gate];
	300
	301	pr_debug("\n");
	302
	303	if (pipe == NFC_HCI_INVALID_PIPE)
	304	return -EADDRNOTAVAIL;
	305
	306	r = nfc_hci_close_pipe(hdev, pipe);
	307	if (r < 0)
	308	return r;
	309
	310	if (pipe != NFC_HCI_LINK_MGMT_PIPE && pipe != NFC_HCI_ADMIN_PIPE) {
	311	r = nfc_hci_delete_pipe(hdev, pipe);
	312	if (r < 0)
	313	return r;
	314	}
	315
	316	hdev->gate2pipe[gate] = NFC_HCI_INVALID_PIPE;
	317
	318	return 0;
	319	}
	320	EXPORT_SYMBOL(nfc_hci_disconnect_gate);
	321
	322	int nfc_hci_disconnect_all_gates(struct nfc_hci_dev *hdev)
	323	{
	324	int r;
	325
	326	pr_debug("\n");
	327
	328	r = nfc_hci_clear_all_pipes(hdev);
	329	if (r < 0)
	330	return r;
	331
	332	memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
	333
	334	return 0;
	335	}
	336	EXPORT_SYMBOL(nfc_hci_disconnect_all_gates);
	337
a10d595b EL	338	int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate,
a10d595b EL	339	u8 pipe)
8b8d2e08	340	{
8b8d2e08 EL	341	bool pipe_created = false;
	342	int r;
	343
	344	pr_debug("\n");
	345
	346	if (hdev->gate2pipe[dest_gate] != NFC_HCI_INVALID_PIPE)
	347	return -EADDRINUSE;
	348
a10d595b	349	if (pipe != NFC_HCI_INVALID_PIPE)
07887e92	350	goto open_pipe;
a10d595b	351
8b8d2e08 EL	352	switch (dest_gate) {
	353	case NFC_HCI_LINK_MGMT_GATE:
	354	pipe = NFC_HCI_LINK_MGMT_PIPE;
	355	break;
	356	case NFC_HCI_ADMIN_GATE:
	357	pipe = NFC_HCI_ADMIN_PIPE;
	358	break;
	359	default:
	360	pipe = nfc_hci_create_pipe(hdev, dest_host, dest_gate, &r);
	361	if (pipe == NFC_HCI_INVALID_PIPE)
	362	return r;
	363	pipe_created = true;
	364	break;
	365	}
	366
07887e92	367	open_pipe:
8b8d2e08 EL	368	r = nfc_hci_open_pipe(hdev, pipe);
	369	if (r < 0) {
	370	if (pipe_created)
	371	if (nfc_hci_delete_pipe(hdev, pipe) < 0) {
	372	/* TODO: Cannot clean by deleting pipe...
	373	* -> inconsistent state */
	374	}
	375	return r;
	376	}
	377
	378	hdev->gate2pipe[dest_gate] = pipe;
	379
	380	return 0;
	381	}
	382	EXPORT_SYMBOL(nfc_hci_connect_gate);