2011-07-01 16:31:33 -06:00
|
|
|
/*
|
|
|
|
* Copyright (C) 2011 Instituto Nokia de Tecnologia
|
|
|
|
*
|
|
|
|
* Authors:
|
|
|
|
* Lauro Ramos Venancio <lauro.venancio@openbossa.org>
|
|
|
|
* Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
|
|
|
|
*
|
|
|
|
* 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, write to the
|
|
|
|
* Free Software Foundation, Inc.,
|
|
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
|
|
|
2011-12-14 08:43:05 -07:00
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
|
2011-11-29 12:37:32 -07:00
|
|
|
|
2011-07-01 16:31:33 -06:00
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/slab.h>
|
2011-12-14 08:43:06 -07:00
|
|
|
#include <linux/nfc.h>
|
2011-07-01 16:31:33 -06:00
|
|
|
|
|
|
|
#include "nfc.h"
|
|
|
|
|
|
|
|
#define VERSION "0.1"
|
|
|
|
|
|
|
|
int nfc_devlist_generation;
|
|
|
|
DEFINE_MUTEX(nfc_devlist_mutex);
|
|
|
|
|
2011-09-18 02:19:33 -06:00
|
|
|
/**
|
|
|
|
* nfc_dev_up - turn on the NFC device
|
|
|
|
*
|
|
|
|
* @dev: The nfc device to be turned on
|
|
|
|
*
|
|
|
|
* The device remains up until the nfc_dev_down function is called.
|
|
|
|
*/
|
|
|
|
int nfc_dev_up(struct nfc_dev *dev)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
|
|
|
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
|
2011-09-18 02:19:33 -06:00
|
|
|
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
|
|
|
|
if (!device_is_registered(&dev->dev)) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dev->dev_up) {
|
|
|
|
rc = -EALREADY;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dev->ops->dev_up)
|
|
|
|
rc = dev->ops->dev_up(dev);
|
|
|
|
|
|
|
|
if (!rc)
|
|
|
|
dev->dev_up = true;
|
|
|
|
|
|
|
|
error:
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nfc_dev_down - turn off the NFC device
|
|
|
|
*
|
|
|
|
* @dev: The nfc device to be turned off
|
|
|
|
*/
|
|
|
|
int nfc_dev_down(struct nfc_dev *dev)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
|
|
|
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
|
2011-09-18 02:19:33 -06:00
|
|
|
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
|
|
|
|
if (!device_is_registered(&dev->dev)) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!dev->dev_up) {
|
|
|
|
rc = -EALREADY;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dev->polling || dev->remote_activated) {
|
|
|
|
rc = -EBUSY;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dev->ops->dev_down)
|
|
|
|
dev->ops->dev_down(dev);
|
|
|
|
|
|
|
|
dev->dev_up = false;
|
|
|
|
|
|
|
|
error:
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2011-07-01 16:31:33 -06:00
|
|
|
/**
|
|
|
|
* nfc_start_poll - start polling for nfc targets
|
|
|
|
*
|
|
|
|
* @dev: The nfc device that must start polling
|
|
|
|
* @protocols: bitset of nfc protocols that must be used for polling
|
|
|
|
*
|
|
|
|
* The device remains polling for targets until a target is found or
|
|
|
|
* the nfc_stop_poll function is called.
|
|
|
|
*/
|
|
|
|
int nfc_start_poll(struct nfc_dev *dev, u32 protocols)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s protocols=0x%x\n",
|
|
|
|
dev_name(&dev->dev), protocols);
|
2011-07-01 16:31:33 -06:00
|
|
|
|
|
|
|
if (!protocols)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
|
|
|
|
if (!device_is_registered(&dev->dev)) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dev->polling) {
|
|
|
|
rc = -EBUSY;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
rc = dev->ops->start_poll(dev, protocols);
|
|
|
|
if (!rc)
|
|
|
|
dev->polling = true;
|
|
|
|
|
|
|
|
error:
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nfc_stop_poll - stop polling for nfc targets
|
|
|
|
*
|
|
|
|
* @dev: The nfc device that must stop polling
|
|
|
|
*/
|
|
|
|
int nfc_stop_poll(struct nfc_dev *dev)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
|
|
|
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
|
2011-07-01 16:31:33 -06:00
|
|
|
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
|
|
|
|
if (!device_is_registered(&dev->dev)) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!dev->polling) {
|
|
|
|
rc = -EINVAL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev->ops->stop_poll(dev);
|
|
|
|
dev->polling = false;
|
|
|
|
|
|
|
|
error:
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2012-03-04 17:03:50 -07:00
|
|
|
int nfc_dep_link_up(struct nfc_dev *dev, int target_index, u8 comm_mode)
|
2011-12-14 08:43:09 -07:00
|
|
|
{
|
|
|
|
int rc = 0;
|
2012-03-04 17:03:50 -07:00
|
|
|
u8 *gb;
|
|
|
|
size_t gb_len;
|
2011-12-14 08:43:09 -07:00
|
|
|
|
2012-03-04 17:03:50 -07:00
|
|
|
pr_debug("dev_name=%s comm %d\n", dev_name(&dev->dev), comm_mode);
|
2011-12-14 08:43:09 -07:00
|
|
|
|
|
|
|
if (!dev->ops->dep_link_up)
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
|
|
|
|
if (!device_is_registered(&dev->dev)) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dev->dep_link_up == true) {
|
|
|
|
rc = -EALREADY;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
2012-03-04 17:03:50 -07:00
|
|
|
gb = nfc_llcp_general_bytes(dev, &gb_len);
|
|
|
|
if (gb_len > NFC_MAX_GT_LEN) {
|
|
|
|
rc = -EINVAL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
rc = dev->ops->dep_link_up(dev, target_index, comm_mode, gb, gb_len);
|
2011-12-14 08:43:09 -07:00
|
|
|
|
|
|
|
error:
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
int nfc_dep_link_down(struct nfc_dev *dev)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
|
|
|
|
|
|
|
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
|
|
|
|
|
|
|
|
if (!dev->ops->dep_link_down)
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
|
|
|
|
if (!device_is_registered(&dev->dev)) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dev->dep_link_up == false) {
|
|
|
|
rc = -EALREADY;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dev->dep_rf_mode == NFC_RF_TARGET) {
|
|
|
|
rc = -EOPNOTSUPP;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
rc = dev->ops->dep_link_down(dev);
|
|
|
|
if (!rc) {
|
|
|
|
dev->dep_link_up = false;
|
2011-12-14 08:43:12 -07:00
|
|
|
nfc_llcp_mac_is_down(dev);
|
2011-12-14 08:43:09 -07:00
|
|
|
nfc_genl_dep_link_down_event(dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
error:
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
|
2012-03-04 17:03:53 -07:00
|
|
|
u8 comm_mode, u8 rf_mode)
|
2011-12-14 08:43:09 -07:00
|
|
|
{
|
|
|
|
dev->dep_link_up = true;
|
|
|
|
dev->dep_rf_mode = rf_mode;
|
|
|
|
|
2011-12-14 08:43:12 -07:00
|
|
|
nfc_llcp_mac_is_up(dev, target_idx, comm_mode, rf_mode);
|
|
|
|
|
2011-12-14 08:43:09 -07:00
|
|
|
return nfc_genl_dep_link_up_event(dev, target_idx, comm_mode, rf_mode);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(nfc_dep_link_is_up);
|
|
|
|
|
2011-07-01 16:31:33 -06:00
|
|
|
/**
|
|
|
|
* nfc_activate_target - prepare the target for data exchange
|
|
|
|
*
|
|
|
|
* @dev: The nfc device that found the target
|
|
|
|
* @target_idx: index of the target that must be activated
|
|
|
|
* @protocol: nfc protocol that will be used for data exchange
|
|
|
|
*/
|
|
|
|
int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s target_idx=%u protocol=%u\n",
|
|
|
|
dev_name(&dev->dev), target_idx, protocol);
|
2011-07-01 16:31:33 -06:00
|
|
|
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
|
|
|
|
if (!device_is_registered(&dev->dev)) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
rc = dev->ops->activate_target(dev, target_idx, protocol);
|
2011-09-18 02:19:33 -06:00
|
|
|
if (!rc)
|
|
|
|
dev->remote_activated = true;
|
2011-07-01 16:31:33 -06:00
|
|
|
|
|
|
|
error:
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nfc_deactivate_target - deactivate a nfc target
|
|
|
|
*
|
|
|
|
* @dev: The nfc device that found the target
|
|
|
|
* @target_idx: index of the target that must be deactivated
|
|
|
|
*/
|
|
|
|
int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
|
|
|
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s target_idx=%u\n",
|
|
|
|
dev_name(&dev->dev), target_idx);
|
2011-07-01 16:31:33 -06:00
|
|
|
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
|
|
|
|
if (!device_is_registered(&dev->dev)) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev->ops->deactivate_target(dev, target_idx);
|
2011-09-18 02:19:33 -06:00
|
|
|
dev->remote_activated = false;
|
2011-07-01 16:31:33 -06:00
|
|
|
|
|
|
|
error:
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nfc_data_exchange - transceive data
|
|
|
|
*
|
|
|
|
* @dev: The nfc device that found the target
|
|
|
|
* @target_idx: index of the target
|
|
|
|
* @skb: data to be sent
|
|
|
|
* @cb: callback called when the response is received
|
|
|
|
* @cb_context: parameter for the callback function
|
|
|
|
*
|
|
|
|
* The user must wait for the callback before calling this function again.
|
|
|
|
*/
|
2012-03-04 17:03:53 -07:00
|
|
|
int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb,
|
|
|
|
data_exchange_cb_t cb, void *cb_context)
|
2011-07-01 16:31:33 -06:00
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s target_idx=%u skb->len=%u\n",
|
|
|
|
dev_name(&dev->dev), target_idx, skb->len);
|
2011-07-01 16:31:33 -06:00
|
|
|
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
|
|
|
|
if (!device_is_registered(&dev->dev)) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
kfree_skb(skb);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
rc = dev->ops->data_exchange(dev, target_idx, skb, cb, cb_context);
|
|
|
|
|
|
|
|
error:
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2011-12-14 08:43:10 -07:00
|
|
|
int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len)
|
|
|
|
{
|
2012-03-04 17:03:53 -07:00
|
|
|
pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len);
|
2011-12-14 08:43:10 -07:00
|
|
|
|
|
|
|
if (gb_len > NFC_MAX_GT_LEN)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2011-12-14 08:43:12 -07:00
|
|
|
return nfc_llcp_set_remote_gb(dev, gb, gb_len);
|
2011-12-14 08:43:10 -07:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(nfc_set_remote_general_bytes);
|
|
|
|
|
2011-07-01 16:31:33 -06:00
|
|
|
/**
|
2011-12-14 08:43:06 -07:00
|
|
|
* nfc_alloc_send_skb - allocate a skb for data exchange responses
|
2011-07-01 16:31:33 -06:00
|
|
|
*
|
|
|
|
* @size: size to allocate
|
|
|
|
* @gfp: gfp flags
|
|
|
|
*/
|
2011-12-14 08:43:06 -07:00
|
|
|
struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk,
|
2012-03-04 17:03:53 -07:00
|
|
|
unsigned int flags, unsigned int size,
|
|
|
|
unsigned int *err)
|
2011-12-14 08:43:06 -07:00
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
unsigned int total_size;
|
|
|
|
|
|
|
|
total_size = size +
|
|
|
|
dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
|
|
|
|
|
|
|
|
skb = sock_alloc_send_skb(sk, total_size, flags & MSG_DONTWAIT, err);
|
|
|
|
if (skb)
|
|
|
|
skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
|
|
|
|
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nfc_alloc_recv_skb - allocate a skb for data exchange responses
|
|
|
|
*
|
|
|
|
* @size: size to allocate
|
|
|
|
* @gfp: gfp flags
|
|
|
|
*/
|
|
|
|
struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp)
|
2011-07-01 16:31:33 -06:00
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
unsigned int total_size;
|
|
|
|
|
|
|
|
total_size = size + 1;
|
|
|
|
skb = alloc_skb(total_size, gfp);
|
|
|
|
|
|
|
|
if (skb)
|
|
|
|
skb_reserve(skb, 1);
|
|
|
|
|
|
|
|
return skb;
|
|
|
|
}
|
2011-12-14 08:43:06 -07:00
|
|
|
EXPORT_SYMBOL(nfc_alloc_recv_skb);
|
2011-07-01 16:31:33 -06:00
|
|
|
|
2011-07-01 16:31:34 -06:00
|
|
|
/**
|
|
|
|
* nfc_targets_found - inform that targets were found
|
|
|
|
*
|
|
|
|
* @dev: The nfc device that found the targets
|
|
|
|
* @targets: array of nfc targets found
|
|
|
|
* @ntargets: targets array size
|
|
|
|
*
|
|
|
|
* The device driver must call this function when one or many nfc targets
|
|
|
|
* are found. After calling this function, the device driver must stop
|
|
|
|
* polling for targets.
|
|
|
|
*/
|
2012-03-04 17:03:53 -07:00
|
|
|
int nfc_targets_found(struct nfc_dev *dev,
|
|
|
|
struct nfc_target *targets, int n_targets)
|
2011-07-01 16:31:34 -06:00
|
|
|
{
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s n_targets=%d\n", dev_name(&dev->dev), n_targets);
|
2011-07-01 16:31:34 -06:00
|
|
|
|
|
|
|
dev->polling = false;
|
|
|
|
|
|
|
|
spin_lock_bh(&dev->targets_lock);
|
|
|
|
|
|
|
|
dev->targets_generation++;
|
|
|
|
|
|
|
|
kfree(dev->targets);
|
|
|
|
dev->targets = kmemdup(targets, n_targets * sizeof(struct nfc_target),
|
2012-03-04 17:03:53 -07:00
|
|
|
GFP_ATOMIC);
|
2011-07-01 16:31:34 -06:00
|
|
|
|
|
|
|
if (!dev->targets) {
|
|
|
|
dev->n_targets = 0;
|
|
|
|
spin_unlock_bh(&dev->targets_lock);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev->n_targets = n_targets;
|
|
|
|
spin_unlock_bh(&dev->targets_lock);
|
|
|
|
|
|
|
|
nfc_genl_targets_found(dev);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(nfc_targets_found);
|
|
|
|
|
2012-04-10 11:43:05 -06:00
|
|
|
int nfc_target_lost(struct nfc_dev *dev, u32 target_idx)
|
|
|
|
{
|
|
|
|
struct nfc_target *tg;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
pr_debug("dev_name %s n_target %d\n", dev_name(&dev->dev), target_idx);
|
|
|
|
|
|
|
|
spin_lock_bh(&dev->targets_lock);
|
|
|
|
|
|
|
|
for (i = 0; i < dev->n_targets; i++) {
|
|
|
|
tg = &dev->targets[i];
|
|
|
|
if (tg->idx == target_idx)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (i == dev->n_targets) {
|
|
|
|
spin_unlock_bh(&dev->targets_lock);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev->targets_generation++;
|
|
|
|
dev->n_targets--;
|
|
|
|
|
|
|
|
if (dev->n_targets) {
|
|
|
|
memcpy(&dev->targets[i], &dev->targets[i + 1],
|
|
|
|
(dev->n_targets - i) * sizeof(struct nfc_target));
|
|
|
|
} else {
|
|
|
|
kfree(dev->targets);
|
|
|
|
dev->targets = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock_bh(&dev->targets_lock);
|
|
|
|
|
|
|
|
nfc_genl_target_lost(dev, target_idx);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(nfc_target_lost);
|
|
|
|
|
2011-07-01 16:31:33 -06:00
|
|
|
static void nfc_release(struct device *d)
|
|
|
|
{
|
|
|
|
struct nfc_dev *dev = to_nfc_dev(d);
|
|
|
|
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
|
2011-07-01 16:31:33 -06:00
|
|
|
|
2011-07-01 16:31:34 -06:00
|
|
|
nfc_genl_data_exit(&dev->genl_data);
|
|
|
|
kfree(dev->targets);
|
2011-07-01 16:31:33 -06:00
|
|
|
kfree(dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
struct class nfc_class = {
|
|
|
|
.name = "nfc",
|
|
|
|
.dev_release = nfc_release,
|
|
|
|
};
|
|
|
|
EXPORT_SYMBOL(nfc_class);
|
|
|
|
|
|
|
|
static int match_idx(struct device *d, void *data)
|
|
|
|
{
|
|
|
|
struct nfc_dev *dev = to_nfc_dev(d);
|
|
|
|
unsigned *idx = data;
|
|
|
|
|
|
|
|
return dev->idx == *idx;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct nfc_dev *nfc_get_device(unsigned idx)
|
|
|
|
{
|
|
|
|
struct device *d;
|
|
|
|
|
|
|
|
d = class_find_device(&nfc_class, NULL, &idx, match_idx);
|
|
|
|
if (!d)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
return to_nfc_dev(d);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nfc_allocate_device - allocate a new nfc device
|
|
|
|
*
|
|
|
|
* @ops: device operations
|
|
|
|
* @supported_protocols: NFC protocols supported by the device
|
|
|
|
*/
|
|
|
|
struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
|
2012-03-04 17:03:53 -07:00
|
|
|
u32 supported_protocols,
|
|
|
|
int tx_headroom, int tx_tailroom)
|
2011-07-01 16:31:33 -06:00
|
|
|
{
|
|
|
|
static atomic_t dev_no = ATOMIC_INIT(0);
|
|
|
|
struct nfc_dev *dev;
|
|
|
|
|
|
|
|
if (!ops->start_poll || !ops->stop_poll || !ops->activate_target ||
|
2012-03-04 17:03:53 -07:00
|
|
|
!ops->deactivate_target || !ops->data_exchange)
|
2011-07-01 16:31:33 -06:00
|
|
|
return NULL;
|
|
|
|
|
|
|
|
if (!supported_protocols)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
dev = kzalloc(sizeof(struct nfc_dev), GFP_KERNEL);
|
|
|
|
if (!dev)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
dev->dev.class = &nfc_class;
|
|
|
|
dev->idx = atomic_inc_return(&dev_no) - 1;
|
|
|
|
dev_set_name(&dev->dev, "nfc%d", dev->idx);
|
|
|
|
device_initialize(&dev->dev);
|
|
|
|
|
|
|
|
dev->ops = ops;
|
|
|
|
dev->supported_protocols = supported_protocols;
|
2011-08-19 07:47:11 -06:00
|
|
|
dev->tx_headroom = tx_headroom;
|
|
|
|
dev->tx_tailroom = tx_tailroom;
|
2011-07-01 16:31:33 -06:00
|
|
|
|
2011-07-01 16:31:34 -06:00
|
|
|
spin_lock_init(&dev->targets_lock);
|
|
|
|
nfc_genl_data_init(&dev->genl_data);
|
|
|
|
|
|
|
|
/* first generation must not be 0 */
|
|
|
|
dev->targets_generation = 1;
|
|
|
|
|
2011-07-01 16:31:33 -06:00
|
|
|
return dev;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(nfc_allocate_device);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nfc_register_device - register a nfc device in the nfc subsystem
|
|
|
|
*
|
|
|
|
* @dev: The nfc device to register
|
|
|
|
*/
|
|
|
|
int nfc_register_device(struct nfc_dev *dev)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
|
2011-07-01 16:31:33 -06:00
|
|
|
|
|
|
|
mutex_lock(&nfc_devlist_mutex);
|
|
|
|
nfc_devlist_generation++;
|
|
|
|
rc = device_add(&dev->dev);
|
|
|
|
mutex_unlock(&nfc_devlist_mutex);
|
|
|
|
|
2011-07-01 16:31:34 -06:00
|
|
|
if (rc < 0)
|
|
|
|
return rc;
|
|
|
|
|
2011-12-14 08:43:12 -07:00
|
|
|
rc = nfc_llcp_register_device(dev);
|
|
|
|
if (rc)
|
|
|
|
pr_err("Could not register llcp device\n");
|
|
|
|
|
2011-07-01 16:31:34 -06:00
|
|
|
rc = nfc_genl_device_added(dev);
|
|
|
|
if (rc)
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("The userspace won't be notified that the device %s was added\n",
|
|
|
|
dev_name(&dev->dev));
|
2011-07-01 16:31:34 -06:00
|
|
|
|
|
|
|
return 0;
|
2011-07-01 16:31:33 -06:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(nfc_register_device);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nfc_unregister_device - unregister a nfc device in the nfc subsystem
|
|
|
|
*
|
|
|
|
* @dev: The nfc device to unregister
|
|
|
|
*/
|
|
|
|
void nfc_unregister_device(struct nfc_dev *dev)
|
|
|
|
{
|
2011-07-01 16:31:34 -06:00
|
|
|
int rc;
|
|
|
|
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
|
2011-07-01 16:31:33 -06:00
|
|
|
|
|
|
|
mutex_lock(&nfc_devlist_mutex);
|
|
|
|
nfc_devlist_generation++;
|
|
|
|
|
|
|
|
/* lock to avoid unregistering a device while an operation
|
|
|
|
is in progress */
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
device_del(&dev->dev);
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
|
|
|
|
mutex_unlock(&nfc_devlist_mutex);
|
2011-07-01 16:31:34 -06:00
|
|
|
|
2011-12-14 08:43:12 -07:00
|
|
|
nfc_llcp_unregister_device(dev);
|
|
|
|
|
2011-07-01 16:31:34 -06:00
|
|
|
rc = nfc_genl_device_removed(dev);
|
|
|
|
if (rc)
|
2011-11-29 12:37:33 -07:00
|
|
|
pr_debug("The userspace won't be notified that the device %s was removed\n",
|
|
|
|
dev_name(&dev->dev));
|
2011-07-01 16:31:34 -06:00
|
|
|
|
2011-07-01 16:31:33 -06:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(nfc_unregister_device);
|
|
|
|
|
|
|
|
static int __init nfc_init(void)
|
|
|
|
{
|
2011-07-01 16:31:34 -06:00
|
|
|
int rc;
|
|
|
|
|
2011-11-29 12:37:32 -07:00
|
|
|
pr_info("NFC Core ver %s\n", VERSION);
|
2011-07-01 16:31:33 -06:00
|
|
|
|
2011-07-01 16:31:34 -06:00
|
|
|
rc = class_register(&nfc_class);
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
rc = nfc_genl_init();
|
|
|
|
if (rc)
|
|
|
|
goto err_genl;
|
|
|
|
|
|
|
|
/* the first generation must not be 0 */
|
|
|
|
nfc_devlist_generation = 1;
|
|
|
|
|
2011-07-01 16:31:36 -06:00
|
|
|
rc = rawsock_init();
|
|
|
|
if (rc)
|
|
|
|
goto err_rawsock;
|
|
|
|
|
2011-12-14 08:43:12 -07:00
|
|
|
rc = nfc_llcp_init();
|
|
|
|
if (rc)
|
|
|
|
goto err_llcp_sock;
|
|
|
|
|
2011-07-01 16:31:35 -06:00
|
|
|
rc = af_nfc_init();
|
|
|
|
if (rc)
|
|
|
|
goto err_af_nfc;
|
|
|
|
|
2011-07-01 16:31:34 -06:00
|
|
|
return 0;
|
|
|
|
|
2011-07-01 16:31:35 -06:00
|
|
|
err_af_nfc:
|
2011-12-14 08:43:12 -07:00
|
|
|
nfc_llcp_exit();
|
|
|
|
err_llcp_sock:
|
2011-07-01 16:31:36 -06:00
|
|
|
rawsock_exit();
|
|
|
|
err_rawsock:
|
2011-07-01 16:31:35 -06:00
|
|
|
nfc_genl_exit();
|
2011-07-01 16:31:34 -06:00
|
|
|
err_genl:
|
|
|
|
class_unregister(&nfc_class);
|
|
|
|
return rc;
|
2011-07-01 16:31:33 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit nfc_exit(void)
|
|
|
|
{
|
2011-07-01 16:31:35 -06:00
|
|
|
af_nfc_exit();
|
2011-12-14 08:43:12 -07:00
|
|
|
nfc_llcp_exit();
|
2011-07-01 16:31:36 -06:00
|
|
|
rawsock_exit();
|
2011-07-01 16:31:34 -06:00
|
|
|
nfc_genl_exit();
|
2011-07-01 16:31:33 -06:00
|
|
|
class_unregister(&nfc_class);
|
|
|
|
}
|
|
|
|
|
|
|
|
subsys_initcall(nfc_init);
|
|
|
|
module_exit(nfc_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
|
|
|
|
MODULE_DESCRIPTION("NFC Core ver " VERSION);
|
|
|
|
MODULE_VERSION(VERSION);
|
|
|
|
MODULE_LICENSE("GPL");
|