[deliverable/linux.git] / net / nfc / nci / rsp.c

/*
 *  The NFC Controller Interface is the communication protocol between an
 *  NFC Controller (NFCC) and a Device Host (DH).
 *
 *  Copyright (C) 2011 Texas Instruments, Inc.
 *
 *  Written by Ilan Elias <ilane@ti.com>
 *
 *  Acknowledgements:
 *  This file is based on hci_event.c, which was written
 *  by Maxim Krasnyansky.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2
 *  as published by the Free Software Foundation
 *
 *  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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

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

#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/skbuff.h>

#include "../nfc.h"
#include <net/nfc/nci.h>
#include <net/nfc/nci_core.h>

/* Handle NCI Response packets */

static void nci_core_reset_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
{
	struct nci_core_reset_rsp *rsp = (void *) skb->data;

	pr_debug("status 0x%x\n", rsp->status);

	if (rsp->status == NCI_STATUS_OK) {
		ndev->nci_ver = rsp->nci_ver;
		pr_debug("nci_ver 0x%x, config_status 0x%x\n",
			 rsp->nci_ver, rsp->config_status);
	}

	nci_req_complete(ndev, rsp->status);
}

static void nci_core_init_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
{
	struct nci_core_init_rsp_1 *rsp_1 = (void *) skb->data;
	struct nci_core_init_rsp_2 *rsp_2;

	pr_debug("status 0x%x\n", rsp_1->status);

	if (rsp_1->status != NCI_STATUS_OK)
		goto exit;

	ndev->nfcc_features = __le32_to_cpu(rsp_1->nfcc_features);
	ndev->num_supported_rf_interfaces = rsp_1->num_supported_rf_interfaces;

	if (ndev->num_supported_rf_interfaces >
			NCI_MAX_SUPPORTED_RF_INTERFACES) {
		ndev->num_supported_rf_interfaces =
			NCI_MAX_SUPPORTED_RF_INTERFACES;
	}

	memcpy(ndev->supported_rf_interfaces,
		rsp_1->supported_rf_interfaces,
		ndev->num_supported_rf_interfaces);

	rsp_2 = (void *) (skb->data + 6 + rsp_1->num_supported_rf_interfaces);

	ndev->max_logical_connections =
		rsp_2->max_logical_connections;
	ndev->max_routing_table_size =
		__le16_to_cpu(rsp_2->max_routing_table_size);
	ndev->max_ctrl_pkt_payload_len =
		rsp_2->max_ctrl_pkt_payload_len;
	ndev->max_size_for_large_params =
		__le16_to_cpu(rsp_2->max_size_for_large_params);
	ndev->manufact_id =
		rsp_2->manufact_id;
	ndev->manufact_specific_info =
		__le32_to_cpu(rsp_2->manufact_specific_info);

	pr_debug("nfcc_features 0x%x\n",
		 ndev->nfcc_features);
	pr_debug("num_supported_rf_interfaces %d\n",
		 ndev->num_supported_rf_interfaces);
	pr_debug("supported_rf_interfaces[0] 0x%x\n",
		 ndev->supported_rf_interfaces[0]);
	pr_debug("supported_rf_interfaces[1] 0x%x\n",
		 ndev->supported_rf_interfaces[1]);
	pr_debug("supported_rf_interfaces[2] 0x%x\n",
		 ndev->supported_rf_interfaces[2]);
	pr_debug("supported_rf_interfaces[3] 0x%x\n",
		 ndev->supported_rf_interfaces[3]);
	pr_debug("max_logical_connections %d\n",
		 ndev->max_logical_connections);
	pr_debug("max_routing_table_size %d\n",
		 ndev->max_routing_table_size);
	pr_debug("max_ctrl_pkt_payload_len %d\n",
		 ndev->max_ctrl_pkt_payload_len);
	pr_debug("max_size_for_large_params %d\n",
		 ndev->max_size_for_large_params);
	pr_debug("manufact_id 0x%x\n",
		 ndev->manufact_id);
	pr_debug("manufact_specific_info 0x%x\n",
		 ndev->manufact_specific_info);

exit:
	nci_req_complete(ndev, rsp_1->status);
}

static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
					struct sk_buff *skb)
{
	__u8 status = skb->data[0];

	pr_debug("status 0x%x\n", status);

	nci_req_complete(ndev, status);
}

static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
{
	__u8 status = skb->data[0];

	pr_debug("status 0x%x\n", status);

	if (status == NCI_STATUS_OK)
		atomic_set(&ndev->state, NCI_DISCOVERY);

	nci_req_complete(ndev, status);
}

static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev,
					struct sk_buff *skb)
{
	__u8 status = skb->data[0];

	pr_debug("status 0x%x\n", status);

	/* If target was active, complete the request only in deactivate_ntf */
	if ((status != NCI_STATUS_OK) ||
		(atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
		atomic_set(&ndev->state, NCI_IDLE);
		nci_req_complete(ndev, status);
	}
}

void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
{
	__u16 rsp_opcode = nci_opcode(skb->data);

	/* we got a rsp, stop the cmd timer */
	del_timer(&ndev->cmd_timer);

	pr_debug("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
		 nci_pbf(skb->data),
		 nci_opcode_gid(rsp_opcode),
		 nci_opcode_oid(rsp_opcode),
		 nci_plen(skb->data));

	/* strip the nci control header */
	skb_pull(skb, NCI_CTRL_HDR_SIZE);

	switch (rsp_opcode) {
	case NCI_OP_CORE_RESET_RSP:
		nci_core_reset_rsp_packet(ndev, skb);
		break;

	case NCI_OP_CORE_INIT_RSP:
		nci_core_init_rsp_packet(ndev, skb);
		break;

	case NCI_OP_RF_DISCOVER_MAP_RSP:
		nci_rf_disc_map_rsp_packet(ndev, skb);
		break;

	case NCI_OP_RF_DISCOVER_RSP:
		nci_rf_disc_rsp_packet(ndev, skb);
		break;

	case NCI_OP_RF_DEACTIVATE_RSP:
		nci_rf_deactivate_rsp_packet(ndev, skb);
		break;

	default:
		pr_err("unknown rsp opcode 0x%x\n", rsp_opcode);
		break;
	}

	kfree_skb(skb);

	/* trigger the next cmd */
	atomic_set(&ndev->cmd_cnt, 1);
	if (!skb_queue_empty(&ndev->cmd_q))
		queue_work(ndev->cmd_wq, &ndev->cmd_work);
}
Commit	Line	Data
6a2968aa IE	1	/*
	2	* The NFC Controller Interface is the communication protocol between an
	3	* NFC Controller (NFCC) and a Device Host (DH).
	4	*
	5	* Copyright (C) 2011 Texas Instruments, Inc.
	6	*
	7	* Written by Ilan Elias <ilane@ti.com>
	8	*
	9	* Acknowledgements:
	10	* This file is based on hci_event.c, which was written
	11	* by Maxim Krasnyansky.
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License version 2
	15	* as published by the Free Software Foundation
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	25	*
	26	*/
	27
52858b51	28	#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
ed1e0ad8	29
6a2968aa IE	30	#include <linux/types.h>
	31	#include <linux/interrupt.h>
	32	#include <linux/bitops.h>
	33	#include <linux/skbuff.h>
	34
	35	#include "../nfc.h"
	36	#include <net/nfc/nci.h>
	37	#include <net/nfc/nci_core.h>
	38
	39	/* Handle NCI Response packets */
	40
	41	static void nci_core_reset_rsp_packet(struct nci_dev ndev, struct sk_buff skb)
	42	{
	43	struct nci_core_reset_rsp rsp = (void ) skb->data;
	44
24bf3304	45	pr_debug("status 0x%x\n", rsp->status);
6a2968aa	46
e8c0dacd	47	if (rsp->status == NCI_STATUS_OK) {
6a2968aa	48	ndev->nci_ver = rsp->nci_ver;
20c239c1 JP	49	pr_debug("nci_ver 0x%x, config_status 0x%x\n",
20c239c1 JP	50	rsp->nci_ver, rsp->config_status);
e8c0dacd	51	}
6a2968aa IE	52
	53	nci_req_complete(ndev, rsp->status);
	54	}
	55
	56	static void nci_core_init_rsp_packet(struct nci_dev ndev, struct sk_buff skb)
	57	{
	58	struct nci_core_init_rsp_1 rsp_1 = (void ) skb->data;
	59	struct nci_core_init_rsp_2 *rsp_2;
	60
24bf3304	61	pr_debug("status 0x%x\n", rsp_1->status);
6a2968aa IE	62
6a2968aa IE	63	if (rsp_1->status != NCI_STATUS_OK)
e8c0dacd	64	goto exit;
6a2968aa IE	65
	66	ndev->nfcc_features = __le32_to_cpu(rsp_1->nfcc_features);
	67	ndev->num_supported_rf_interfaces = rsp_1->num_supported_rf_interfaces;
	68
	69	if (ndev->num_supported_rf_interfaces >
e8c0dacd	70	NCI_MAX_SUPPORTED_RF_INTERFACES) {
6a2968aa IE	71	ndev->num_supported_rf_interfaces =
	72	NCI_MAX_SUPPORTED_RF_INTERFACES;
	73	}
	74
	75	memcpy(ndev->supported_rf_interfaces,
	76	rsp_1->supported_rf_interfaces,
	77	ndev->num_supported_rf_interfaces);
	78
e8c0dacd	79	rsp_2 = (void *) (skb->data + 6 + rsp_1->num_supported_rf_interfaces);
6a2968aa IE	80
	81	ndev->max_logical_connections =
	82	rsp_2->max_logical_connections;
	83	ndev->max_routing_table_size =
	84	__le16_to_cpu(rsp_2->max_routing_table_size);
e8c0dacd IE	85	ndev->max_ctrl_pkt_payload_len =
	86	rsp_2->max_ctrl_pkt_payload_len;
	87	ndev->max_size_for_large_params =
	88	__le16_to_cpu(rsp_2->max_size_for_large_params);
e8c0dacd IE	89	ndev->manufact_id =
	90	rsp_2->manufact_id;
	91	ndev->manufact_specific_info =
	92	__le32_to_cpu(rsp_2->manufact_specific_info);
	93
20c239c1 JP	94	pr_debug("nfcc_features 0x%x\n",
	95	ndev->nfcc_features);
	96	pr_debug("num_supported_rf_interfaces %d\n",
	97	ndev->num_supported_rf_interfaces);
	98	pr_debug("supported_rf_interfaces[0] 0x%x\n",
	99	ndev->supported_rf_interfaces[0]);
	100	pr_debug("supported_rf_interfaces[1] 0x%x\n",
	101	ndev->supported_rf_interfaces[1]);
	102	pr_debug("supported_rf_interfaces[2] 0x%x\n",
	103	ndev->supported_rf_interfaces[2]);
	104	pr_debug("supported_rf_interfaces[3] 0x%x\n",
	105	ndev->supported_rf_interfaces[3]);
	106	pr_debug("max_logical_connections %d\n",
	107	ndev->max_logical_connections);
	108	pr_debug("max_routing_table_size %d\n",
	109	ndev->max_routing_table_size);
	110	pr_debug("max_ctrl_pkt_payload_len %d\n",
	111	ndev->max_ctrl_pkt_payload_len);
	112	pr_debug("max_size_for_large_params %d\n",
	113	ndev->max_size_for_large_params);
20c239c1 JP	114	pr_debug("manufact_id 0x%x\n",
	115	ndev->manufact_id);
	116	pr_debug("manufact_specific_info 0x%x\n",
	117	ndev->manufact_specific_info);
e8c0dacd IE	118
e8c0dacd IE	119	exit:
6a2968aa IE	120	nci_req_complete(ndev, rsp_1->status);
	121	}
	122
6a2968aa IE	123	static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
	124	struct sk_buff *skb)
	125	{
	126	__u8 status = skb->data[0];
	127
24bf3304	128	pr_debug("status 0x%x\n", status);
6a2968aa IE	129
	130	nci_req_complete(ndev, status);
	131	}
	132
	133	static void nci_rf_disc_rsp_packet(struct nci_dev ndev, struct sk_buff skb)
	134	{
	135	__u8 status = skb->data[0];
	136
24bf3304	137	pr_debug("status 0x%x\n", status);
6a2968aa IE	138
6a2968aa IE	139	if (status == NCI_STATUS_OK)
8939e47f	140	atomic_set(&ndev->state, NCI_DISCOVERY);
6a2968aa IE	141
	142	nci_req_complete(ndev, status);
	143	}
	144
	145	static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev,
	146	struct sk_buff *skb)
	147	{
	148	__u8 status = skb->data[0];
	149
24bf3304	150	pr_debug("status 0x%x\n", status);
6a2968aa	151
bd7e01bc IE	152	/* If target was active, complete the request only in deactivate_ntf */
bd7e01bc IE	153	if ((status != NCI_STATUS_OK) \|\|
8939e47f IE	154	(atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
8939e47f IE	155	atomic_set(&ndev->state, NCI_IDLE);
bd7e01bc	156	nci_req_complete(ndev, status);
8939e47f	157	}
6a2968aa IE	158	}
	159
	160	void nci_rsp_packet(struct nci_dev ndev, struct sk_buff skb)
	161	{
	162	__u16 rsp_opcode = nci_opcode(skb->data);
	163
	164	/* we got a rsp, stop the cmd timer */
	165	del_timer(&ndev->cmd_timer);
	166
20c239c1 JP	167	pr_debug("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
	168	nci_pbf(skb->data),
	169	nci_opcode_gid(rsp_opcode),
	170	nci_opcode_oid(rsp_opcode),
	171	nci_plen(skb->data));
6a2968aa IE	172
	173	/* strip the nci control header */
	174	skb_pull(skb, NCI_CTRL_HDR_SIZE);
	175
	176	switch (rsp_opcode) {
	177	case NCI_OP_CORE_RESET_RSP:
	178	nci_core_reset_rsp_packet(ndev, skb);
	179	break;
	180
	181	case NCI_OP_CORE_INIT_RSP:
	182	nci_core_init_rsp_packet(ndev, skb);
	183	break;
	184
6a2968aa IE	185	case NCI_OP_RF_DISCOVER_MAP_RSP:
	186	nci_rf_disc_map_rsp_packet(ndev, skb);
	187	break;
	188
	189	case NCI_OP_RF_DISCOVER_RSP:
	190	nci_rf_disc_rsp_packet(ndev, skb);
	191	break;
	192
	193	case NCI_OP_RF_DEACTIVATE_RSP:
	194	nci_rf_deactivate_rsp_packet(ndev, skb);
	195	break;
	196
	197	default:
ed1e0ad8	198	pr_err("unknown rsp opcode 0x%x\n", rsp_opcode);
6a2968aa IE	199	break;
	200	}
	201
	202	kfree_skb(skb);
	203
	204	/* trigger the next cmd */
	205	atomic_set(&ndev->cmd_cnt, 1);
	206	if (!skb_queue_empty(&ndev->cmd_q))
	207	queue_work(ndev->cmd_wq, &ndev->cmd_work);
	208	}