[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, see <http://www.gnu.org/licenses/>.
 *
 */

#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_core_set_config_rsp_packet(struct nci_dev *ndev,
					   struct sk_buff *skb)
{
	struct nci_core_set_config_rsp *rsp = (void *) skb->data;

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

	nci_req_complete(ndev, rsp->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_disc_select_rsp_packet(struct nci_dev *ndev,
					  struct sk_buff *skb)
{
	__u8 status = skb->data[0];

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

	/* Complete the request on intf_activated_ntf or generic_error_ntf */
	if (status != NCI_STATUS_OK)
		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)) {
		nci_clear_target_list(ndev);
		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_CORE_SET_CONFIG_RSP:
		nci_core_set_config_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_DISCOVER_SELECT_RSP:
		nci_rf_disc_select_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
98b32dec	23	* along with this program; if not, see <http://www.gnu.org/licenses/>.
6a2968aa IE	24	*
	25	*/
	26
52858b51	27	#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
ed1e0ad8	28
6a2968aa IE	29	#include <linux/types.h>
	30	#include <linux/interrupt.h>
	31	#include <linux/bitops.h>
	32	#include <linux/skbuff.h>
	33
	34	#include "../nfc.h"
	35	#include <net/nfc/nci.h>
	36	#include <net/nfc/nci_core.h>
	37
	38	/* Handle NCI Response packets */
	39
	40	static void nci_core_reset_rsp_packet(struct nci_dev ndev, struct sk_buff skb)
	41	{
	42	struct nci_core_reset_rsp rsp = (void ) skb->data;
	43
24bf3304	44	pr_debug("status 0x%x\n", rsp->status);
6a2968aa	45
e8c0dacd	46	if (rsp->status == NCI_STATUS_OK) {
6a2968aa	47	ndev->nci_ver = rsp->nci_ver;
20c239c1 JP	48	pr_debug("nci_ver 0x%x, config_status 0x%x\n",
20c239c1 JP	49	rsp->nci_ver, rsp->config_status);
e8c0dacd	50	}
6a2968aa IE	51
	52	nci_req_complete(ndev, rsp->status);
	53	}
	54
	55	static void nci_core_init_rsp_packet(struct nci_dev ndev, struct sk_buff skb)
	56	{
	57	struct nci_core_init_rsp_1 rsp_1 = (void ) skb->data;
	58	struct nci_core_init_rsp_2 *rsp_2;
	59
24bf3304	60	pr_debug("status 0x%x\n", rsp_1->status);
6a2968aa IE	61
6a2968aa IE	62	if (rsp_1->status != NCI_STATUS_OK)
e8c0dacd	63	goto exit;
6a2968aa IE	64
	65	ndev->nfcc_features = __le32_to_cpu(rsp_1->nfcc_features);
	66	ndev->num_supported_rf_interfaces = rsp_1->num_supported_rf_interfaces;
	67
	68	if (ndev->num_supported_rf_interfaces >
eb9bc6e9	69	NCI_MAX_SUPPORTED_RF_INTERFACES) {
6a2968aa IE	70	ndev->num_supported_rf_interfaces =
	71	NCI_MAX_SUPPORTED_RF_INTERFACES;
	72	}
	73
	74	memcpy(ndev->supported_rf_interfaces,
eb9bc6e9 SO	75	rsp_1->supported_rf_interfaces,
eb9bc6e9 SO	76	ndev->num_supported_rf_interfaces);
6a2968aa	77
e8c0dacd	78	rsp_2 = (void *) (skb->data + 6 + rsp_1->num_supported_rf_interfaces);
6a2968aa	79
eb9bc6e9	80	ndev->max_logical_connections = rsp_2->max_logical_connections;
6a2968aa IE	81	ndev->max_routing_table_size =
6a2968aa IE	82	__le16_to_cpu(rsp_2->max_routing_table_size);
e8c0dacd IE	83	ndev->max_ctrl_pkt_payload_len =
	84	rsp_2->max_ctrl_pkt_payload_len;
	85	ndev->max_size_for_large_params =
	86	__le16_to_cpu(rsp_2->max_size_for_large_params);
e8c0dacd IE	87	ndev->manufact_id =
	88	rsp_2->manufact_id;
	89	ndev->manufact_specific_info =
	90	__le32_to_cpu(rsp_2->manufact_specific_info);
	91
20c239c1 JP	92	pr_debug("nfcc_features 0x%x\n",
	93	ndev->nfcc_features);
	94	pr_debug("num_supported_rf_interfaces %d\n",
	95	ndev->num_supported_rf_interfaces);
	96	pr_debug("supported_rf_interfaces[0] 0x%x\n",
	97	ndev->supported_rf_interfaces[0]);
	98	pr_debug("supported_rf_interfaces[1] 0x%x\n",
	99	ndev->supported_rf_interfaces[1]);
	100	pr_debug("supported_rf_interfaces[2] 0x%x\n",
	101	ndev->supported_rf_interfaces[2]);
	102	pr_debug("supported_rf_interfaces[3] 0x%x\n",
	103	ndev->supported_rf_interfaces[3]);
	104	pr_debug("max_logical_connections %d\n",
	105	ndev->max_logical_connections);
	106	pr_debug("max_routing_table_size %d\n",
	107	ndev->max_routing_table_size);
	108	pr_debug("max_ctrl_pkt_payload_len %d\n",
	109	ndev->max_ctrl_pkt_payload_len);
	110	pr_debug("max_size_for_large_params %d\n",
	111	ndev->max_size_for_large_params);
20c239c1 JP	112	pr_debug("manufact_id 0x%x\n",
	113	ndev->manufact_id);
	114	pr_debug("manufact_specific_info 0x%x\n",
	115	ndev->manufact_specific_info);
e8c0dacd IE	116
e8c0dacd IE	117	exit:
6a2968aa IE	118	nci_req_complete(ndev, rsp_1->status);
	119	}
	120
7e035230 IE	121	static void nci_core_set_config_rsp_packet(struct nci_dev *ndev,
	122	struct sk_buff *skb)
	123	{
	124	struct nci_core_set_config_rsp rsp = (void ) skb->data;
	125
	126	pr_debug("status 0x%x\n", rsp->status);
	127
	128	nci_req_complete(ndev, rsp->status);
	129	}
	130
6a2968aa	131	static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
eb9bc6e9	132	struct sk_buff *skb)
6a2968aa IE	133	{
	134	__u8 status = skb->data[0];
	135
24bf3304	136	pr_debug("status 0x%x\n", status);
6a2968aa IE	137
	138	nci_req_complete(ndev, status);
	139	}
	140
	141	static void nci_rf_disc_rsp_packet(struct nci_dev ndev, struct sk_buff skb)
	142	{
	143	__u8 status = skb->data[0];
	144
24bf3304	145	pr_debug("status 0x%x\n", status);
6a2968aa IE	146
6a2968aa IE	147	if (status == NCI_STATUS_OK)
8939e47f	148	atomic_set(&ndev->state, NCI_DISCOVERY);
6a2968aa IE	149
	150	nci_req_complete(ndev, status);
	151	}
	152
019c4fba	153	static void nci_rf_disc_select_rsp_packet(struct nci_dev *ndev,
eb9bc6e9	154	struct sk_buff *skb)
019c4fba IE	155	{
	156	__u8 status = skb->data[0];
	157
	158	pr_debug("status 0x%x\n", status);
	159
	160	/* Complete the request on intf_activated_ntf or generic_error_ntf */
	161	if (status != NCI_STATUS_OK)
	162	nci_req_complete(ndev, status);
	163	}
	164
6a2968aa	165	static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev,
eb9bc6e9	166	struct sk_buff *skb)
6a2968aa IE	167	{
	168	__u8 status = skb->data[0];
	169
24bf3304	170	pr_debug("status 0x%x\n", status);
6a2968aa	171
bd7e01bc IE	172	/* If target was active, complete the request only in deactivate_ntf */
bd7e01bc IE	173	if ((status != NCI_STATUS_OK) \|\|
eb9bc6e9	174	(atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
019c4fba	175	nci_clear_target_list(ndev);
8939e47f	176	atomic_set(&ndev->state, NCI_IDLE);
bd7e01bc	177	nci_req_complete(ndev, status);
8939e47f	178	}
6a2968aa IE	179	}
	180
	181	void nci_rsp_packet(struct nci_dev ndev, struct sk_buff skb)
	182	{
	183	__u16 rsp_opcode = nci_opcode(skb->data);
	184
	185	/* we got a rsp, stop the cmd timer */
	186	del_timer(&ndev->cmd_timer);
	187
20c239c1 JP	188	pr_debug("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
	189	nci_pbf(skb->data),
	190	nci_opcode_gid(rsp_opcode),
	191	nci_opcode_oid(rsp_opcode),
	192	nci_plen(skb->data));
6a2968aa IE	193
	194	/* strip the nci control header */
	195	skb_pull(skb, NCI_CTRL_HDR_SIZE);
	196
	197	switch (rsp_opcode) {
	198	case NCI_OP_CORE_RESET_RSP:
	199	nci_core_reset_rsp_packet(ndev, skb);
	200	break;
	201
	202	case NCI_OP_CORE_INIT_RSP:
	203	nci_core_init_rsp_packet(ndev, skb);
	204	break;
	205
7e035230 IE	206	case NCI_OP_CORE_SET_CONFIG_RSP:
	207	nci_core_set_config_rsp_packet(ndev, skb);
	208	break;
	209
6a2968aa IE	210	case NCI_OP_RF_DISCOVER_MAP_RSP:
	211	nci_rf_disc_map_rsp_packet(ndev, skb);
	212	break;
	213
	214	case NCI_OP_RF_DISCOVER_RSP:
	215	nci_rf_disc_rsp_packet(ndev, skb);
	216	break;
	217
019c4fba IE	218	case NCI_OP_RF_DISCOVER_SELECT_RSP:
	219	nci_rf_disc_select_rsp_packet(ndev, skb);
	220	break;
	221
6a2968aa IE	222	case NCI_OP_RF_DEACTIVATE_RSP:
	223	nci_rf_deactivate_rsp_packet(ndev, skb);
	224	break;
	225
	226	default:
ed1e0ad8	227	pr_err("unknown rsp opcode 0x%x\n", rsp_opcode);
6a2968aa IE	228	break;
	229	}
	230
	231	kfree_skb(skb);
	232
	233	/* trigger the next cmd */
	234	atomic_set(&ndev->cmd_cnt, 1);
	235	if (!skb_queue_empty(&ndev->cmd_q))
	236	queue_work(ndev->cmd_wq, &ndev->cmd_work);
	237	}