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authorDavid S. Miller <davem@davemloft.net>2016-07-20 23:39:36 -0700
committerDavid S. Miller <davem@davemloft.net>2016-07-20 23:39:36 -0700
commit276b8c77c3e4838f574d37e25ec8ba52d0418475 (patch)
tree99bf7313765ca10e40d5a1edde2a5db44143bfb7 /drivers/nfc
parent0f06a6787e0516352117f0720e3052f46bc13523 (diff)
parent2a0fe4fe5bf2a6e2277354e7e8f369a20d881891 (diff)
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Merge tag 'nfc-next-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/nfc-next
Samuel Ortiz says: ==================== NFC 4.8 pull request This is the first NFC pull request for 4.8. We have: - A fairly large NFC digital stack patchset: * RTOX fixes. * Proper DEP RWT support. * ACK and NACK PDUs handling fixes, in both initiator and target modes. * A few memory leak fixes. - A conversion of the nfcsim driver to use the digital stack. The driver supports the DEP protocol in both NFC-A and NFC-F. - Error injection through debugfs for the nfcsim driver. - Improvements to the port100 driver for the Sony USB chipset, in particular to the command abort and cancellation code paths. - A few minor fixes for the pn533, trf7970a and fdp drivers. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/nfc')
-rw-r--r--drivers/nfc/Kconfig1
-rw-r--r--drivers/nfc/fdp/fdp.c6
-rw-r--r--drivers/nfc/nfcsim.c643
-rw-r--r--drivers/nfc/pn533/usb.c9
-rw-r--r--drivers/nfc/port100.c82
-rw-r--r--drivers/nfc/trf7970a.c4
6 files changed, 392 insertions, 353 deletions
diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig
index ea8321a483f9..9d2369269abf 100644
--- a/drivers/nfc/Kconfig
+++ b/drivers/nfc/Kconfig
@@ -40,6 +40,7 @@ config NFC_MEI_PHY
config NFC_SIM
tristate "NFC hardware simulator driver"
+ depends on NFC_DIGITAL
help
This driver declares two virtual NFC devices supporting NFC-DEP
protocol. An LLCP connection can be established between them and
diff --git a/drivers/nfc/fdp/fdp.c b/drivers/nfc/fdp/fdp.c
index e44a7a2f4061..7c1eaea3b685 100644
--- a/drivers/nfc/fdp/fdp.c
+++ b/drivers/nfc/fdp/fdp.c
@@ -345,7 +345,7 @@ static void fdp_nci_release_firmware(struct nci_dev *ndev)
if (info->ram_patch) {
release_firmware(info->ram_patch);
- info->otp_patch = NULL;
+ info->ram_patch = NULL;
}
}
@@ -353,7 +353,7 @@ static int fdp_nci_patch_otp(struct nci_dev *ndev)
{
struct fdp_nci_info *info = nci_get_drvdata(ndev);
struct device *dev = &info->phy->i2c_dev->dev;
- u8 conn_id;
+ int conn_id;
int r = 0;
if (info->otp_version >= info->otp_patch_version)
@@ -424,7 +424,7 @@ static int fdp_nci_patch_ram(struct nci_dev *ndev)
{
struct fdp_nci_info *info = nci_get_drvdata(ndev);
struct device *dev = &info->phy->i2c_dev->dev;
- u8 conn_id;
+ int conn_id;
int r = 0;
if (info->ram_version >= info->ram_patch_version)
diff --git a/drivers/nfc/nfcsim.c b/drivers/nfc/nfcsim.c
index 93aaca586858..a466e7978466 100644
--- a/drivers/nfc/nfcsim.c
+++ b/drivers/nfc/nfcsim.c
@@ -16,525 +16,492 @@
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/debugfs.h>
#include <linux/nfc.h>
#include <net/nfc/nfc.h>
+#include <net/nfc/digital.h>
-#define DEV_ERR(_dev, fmt, args...) nfc_err(&_dev->nfc_dev->dev, \
- "%s: " fmt, __func__, ## args)
+#define NFCSIM_ERR(d, fmt, args...) nfc_err(&d->nfc_digital_dev->nfc_dev->dev, \
+ "%s: " fmt, __func__, ## args)
-#define DEV_DBG(_dev, fmt, args...) dev_dbg(&_dev->nfc_dev->dev, \
- "%s: " fmt, __func__, ## args)
+#define NFCSIM_DBG(d, fmt, args...) dev_dbg(&d->nfc_digital_dev->nfc_dev->dev, \
+ "%s: " fmt, __func__, ## args)
-#define NFCSIM_VERSION "0.1"
+#define NFCSIM_VERSION "0.2"
-#define NFCSIM_POLL_NONE 0
-#define NFCSIM_POLL_INITIATOR 1
-#define NFCSIM_POLL_TARGET 2
-#define NFCSIM_POLL_DUAL (NFCSIM_POLL_INITIATOR | NFCSIM_POLL_TARGET)
+#define NFCSIM_MODE_NONE 0
+#define NFCSIM_MODE_INITIATOR 1
+#define NFCSIM_MODE_TARGET 2
-#define RX_DEFAULT_DELAY 5
+#define NFCSIM_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \
+ NFC_DIGITAL_DRV_CAPS_TG_CRC)
struct nfcsim {
- struct nfc_dev *nfc_dev;
+ struct nfc_digital_dev *nfc_digital_dev;
- struct mutex lock;
+ struct work_struct recv_work;
+ struct delayed_work send_work;
- struct delayed_work recv_work;
+ struct nfcsim_link *link_in;
+ struct nfcsim_link *link_out;
- struct sk_buff *clone_skb;
+ bool up;
+ u8 mode;
+ u8 rf_tech;
- struct delayed_work poll_work;
- u8 polling_mode;
- u8 curr_polling_mode;
+ u16 recv_timeout;
- u8 shutting_down;
+ nfc_digital_cmd_complete_t cb;
+ void *arg;
- u8 up;
+ u8 dropframe;
+};
- u8 initiator;
+struct nfcsim_link {
+ struct mutex lock;
- u32 rx_delay;
+ u8 rf_tech;
+ u8 mode;
- data_exchange_cb_t cb;
- void *cb_context;
+ u8 shutdown;
- struct nfcsim *peer_dev;
+ struct sk_buff *skb;
+ wait_queue_head_t recv_wait;
+ u8 cond;
};
-static struct nfcsim *dev0;
-static struct nfcsim *dev1;
-
-static struct workqueue_struct *wq;
-
-static void nfcsim_cleanup_dev(struct nfcsim *dev, u8 shutdown)
+static struct nfcsim_link *nfcsim_link_new(void)
{
- DEV_DBG(dev, "shutdown=%d\n", shutdown);
+ struct nfcsim_link *link;
- mutex_lock(&dev->lock);
+ link = kzalloc(sizeof(struct nfcsim_link), GFP_KERNEL);
+ if (!link)
+ return NULL;
- dev->polling_mode = NFCSIM_POLL_NONE;
- dev->shutting_down = shutdown;
- dev->cb = NULL;
- dev_kfree_skb(dev->clone_skb);
- dev->clone_skb = NULL;
+ mutex_init(&link->lock);
+ init_waitqueue_head(&link->recv_wait);
- mutex_unlock(&dev->lock);
-
- cancel_delayed_work_sync(&dev->poll_work);
- cancel_delayed_work_sync(&dev->recv_work);
+ return link;
}
-static int nfcsim_target_found(struct nfcsim *dev)
+static void nfcsim_link_free(struct nfcsim_link *link)
{
- struct nfc_target nfc_tgt;
+ dev_kfree_skb(link->skb);
+ kfree(link);
+}
- DEV_DBG(dev, "\n");
+static void nfcsim_link_recv_wake(struct nfcsim_link *link)
+{
+ link->cond = 1;
+ wake_up_interruptible(&link->recv_wait);
+}
- memset(&nfc_tgt, 0, sizeof(struct nfc_target));
+static void nfcsim_link_set_skb(struct nfcsim_link *link, struct sk_buff *skb,
+ u8 rf_tech, u8 mode)
+{
+ mutex_lock(&link->lock);
- nfc_tgt.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
- nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
+ dev_kfree_skb(link->skb);
+ link->skb = skb;
+ link->rf_tech = rf_tech;
+ link->mode = mode;
- return 0;
+ mutex_unlock(&link->lock);
}
-static int nfcsim_dev_up(struct nfc_dev *nfc_dev)
+static void nfcsim_link_recv_cancel(struct nfcsim_link *link)
{
- struct nfcsim *dev = nfc_get_drvdata(nfc_dev);
+ mutex_lock(&link->lock);
- DEV_DBG(dev, "\n");
+ link->mode = NFCSIM_MODE_NONE;
- mutex_lock(&dev->lock);
+ mutex_unlock(&link->lock);
- dev->up = 1;
-
- mutex_unlock(&dev->lock);
-
- return 0;
+ nfcsim_link_recv_wake(link);
}
-static int nfcsim_dev_down(struct nfc_dev *nfc_dev)
+static void nfcsim_link_shutdown(struct nfcsim_link *link)
{
- struct nfcsim *dev = nfc_get_drvdata(nfc_dev);
-
- DEV_DBG(dev, "\n");
+ mutex_lock(&link->lock);
- mutex_lock(&dev->lock);
+ link->shutdown = 1;
+ link->mode = NFCSIM_MODE_NONE;
- dev->up = 0;
+ mutex_unlock(&link->lock);
- mutex_unlock(&dev->lock);
-
- return 0;
+ nfcsim_link_recv_wake(link);
}
-static int nfcsim_dep_link_up(struct nfc_dev *nfc_dev,
- struct nfc_target *target,
- u8 comm_mode, u8 *gb, size_t gb_len)
+static struct sk_buff *nfcsim_link_recv_skb(struct nfcsim_link *link,
+ int timeout, u8 rf_tech, u8 mode)
{
int rc;
- struct nfcsim *dev = nfc_get_drvdata(nfc_dev);
- struct nfcsim *peer = dev->peer_dev;
- u8 *remote_gb;
- size_t remote_gb_len;
+ struct sk_buff *skb;
- DEV_DBG(dev, "target_idx: %d, comm_mode: %d\n", target->idx, comm_mode);
+ rc = wait_event_interruptible_timeout(link->recv_wait,
+ link->cond,
+ msecs_to_jiffies(timeout));
- mutex_lock(&peer->lock);
+ mutex_lock(&link->lock);
- nfc_tm_activated(peer->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
- NFC_COMM_ACTIVE, gb, gb_len);
+ skb = link->skb;
+ link->skb = NULL;
- remote_gb = nfc_get_local_general_bytes(peer->nfc_dev, &remote_gb_len);
- if (!remote_gb) {
- DEV_ERR(peer, "Can't get remote general bytes\n");
+ if (!rc) {
+ rc = -ETIMEDOUT;
+ goto done;
+ }
- mutex_unlock(&peer->lock);
- return -EINVAL;
+ if (!skb || link->rf_tech != rf_tech || link->mode == mode) {
+ rc = -EINVAL;
+ goto done;
}
- mutex_unlock(&peer->lock);
+ if (link->shutdown) {
+ rc = -ENODEV;
+ goto done;
+ }
- mutex_lock(&dev->lock);
+done:
+ mutex_unlock(&link->lock);
- rc = nfc_set_remote_general_bytes(nfc_dev, remote_gb, remote_gb_len);
- if (rc) {
- DEV_ERR(dev, "Can't set remote general bytes\n");
- mutex_unlock(&dev->lock);
- return rc;
+ if (rc < 0) {
+ dev_kfree_skb(skb);
+ skb = ERR_PTR(rc);
}
- rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_ACTIVE,
- NFC_RF_INITIATOR);
-
- mutex_unlock(&dev->lock);
+ link->cond = 0;
- return rc;
+ return skb;
}
-static int nfcsim_dep_link_down(struct nfc_dev *nfc_dev)
+static void nfcsim_send_wq(struct work_struct *work)
{
- struct nfcsim *dev = nfc_get_drvdata(nfc_dev);
+ struct nfcsim *dev = container_of(work, struct nfcsim, send_work.work);
- DEV_DBG(dev, "\n");
-
- nfcsim_cleanup_dev(dev, 0);
-
- return 0;
+ /*
+ * To effectively send data, the device just wake up its link_out which
+ * is the link_in of the peer device. The exchanged skb has already been
+ * stored in the dev->link_out through nfcsim_link_set_skb().
+ */
+ nfcsim_link_recv_wake(dev->link_out);
}
-static int nfcsim_start_poll(struct nfc_dev *nfc_dev,
- u32 im_protocols, u32 tm_protocols)
+static void nfcsim_recv_wq(struct work_struct *work)
{
- struct nfcsim *dev = nfc_get_drvdata(nfc_dev);
- int rc;
-
- mutex_lock(&dev->lock);
+ struct nfcsim *dev = container_of(work, struct nfcsim, recv_work);
+ struct sk_buff *skb;
- if (dev->polling_mode != NFCSIM_POLL_NONE) {
- DEV_ERR(dev, "Already in polling mode\n");
- rc = -EBUSY;
- goto exit;
- }
+ skb = nfcsim_link_recv_skb(dev->link_in, dev->recv_timeout,
+ dev->rf_tech, dev->mode);
- if (im_protocols & NFC_PROTO_NFC_DEP_MASK)
- dev->polling_mode |= NFCSIM_POLL_INITIATOR;
+ if (!dev->up) {
+ NFCSIM_ERR(dev, "Device is down\n");
- if (tm_protocols & NFC_PROTO_NFC_DEP_MASK)
- dev->polling_mode |= NFCSIM_POLL_TARGET;
+ if (!IS_ERR(skb))
+ dev_kfree_skb(skb);
- if (dev->polling_mode == NFCSIM_POLL_NONE) {
- DEV_ERR(dev, "Unsupported polling mode\n");
- rc = -EINVAL;
- goto exit;
+ skb = ERR_PTR(-ENODEV);
}
- dev->initiator = 0;
- dev->curr_polling_mode = NFCSIM_POLL_NONE;
+ dev->cb(dev->nfc_digital_dev, dev->arg, skb);
+}
- queue_delayed_work(wq, &dev->poll_work, 0);
+static int nfcsim_send(struct nfc_digital_dev *ddev, struct sk_buff *skb,
+ u16 timeout, nfc_digital_cmd_complete_t cb, void *arg)
+{
+ struct nfcsim *dev = nfc_digital_get_drvdata(ddev);
+ u8 delay;
- DEV_DBG(dev, "Start polling: im: 0x%X, tm: 0x%X\n", im_protocols,
- tm_protocols);
+ if (!dev->up) {
+ NFCSIM_ERR(dev, "Device is down\n");
+ return -ENODEV;
+ }
- rc = 0;
-exit:
- mutex_unlock(&dev->lock);
+ dev->recv_timeout = timeout;
+ dev->cb = cb;
+ dev->arg = arg;
- return rc;
-}
+ schedule_work(&dev->recv_work);
-static void nfcsim_stop_poll(struct nfc_dev *nfc_dev)
-{
- struct nfcsim *dev = nfc_get_drvdata(nfc_dev);
+ if (dev->dropframe) {
+ NFCSIM_DBG(dev, "dropping frame (out of %d)\n", dev->dropframe);
+ dev_kfree_skb(skb);
+ dev->dropframe--;
- DEV_DBG(dev, "Stop poll\n");
+ return 0;
+ }
- mutex_lock(&dev->lock);
+ if (skb) {
+ nfcsim_link_set_skb(dev->link_out, skb, dev->rf_tech,
+ dev->mode);
- dev->polling_mode = NFCSIM_POLL_NONE;
+ /* Add random delay (between 3 and 10 ms) before sending data */
+ get_random_bytes(&delay, 1);
+ delay = 3 + (delay & 0x07);
- mutex_unlock(&dev->lock);
+ schedule_delayed_work(&dev->send_work, msecs_to_jiffies(delay));
+ }
- cancel_delayed_work_sync(&dev->poll_work);
+ return 0;
}
-static int nfcsim_activate_target(struct nfc_dev *nfc_dev,
- struct nfc_target *target, u32 protocol)
+static void nfcsim_abort_cmd(struct nfc_digital_dev *ddev)
{
- struct nfcsim *dev = nfc_get_drvdata(nfc_dev);
-
- DEV_DBG(dev, "\n");
+ struct nfcsim *dev = nfc_digital_get_drvdata(ddev);
- return -ENOTSUPP;
+ nfcsim_link_recv_cancel(dev->link_in);
}
-static void nfcsim_deactivate_target(struct nfc_dev *nfc_dev,
- struct nfc_target *target, u8 mode)
+static int nfcsim_switch_rf(struct nfc_digital_dev *ddev, bool on)
{
- struct nfcsim *dev = nfc_get_drvdata(nfc_dev);
+ struct nfcsim *dev = nfc_digital_get_drvdata(ddev);
+
+ dev->up = on;
- DEV_DBG(dev, "\n");
+ return 0;
}
-static void nfcsim_wq_recv(struct work_struct *work)
+static int nfcsim_in_configure_hw(struct nfc_digital_dev *ddev,
+ int type, int param)
{
- struct nfcsim *dev = container_of(work, struct nfcsim,
- recv_work.work);
+ struct nfcsim *dev = nfc_digital_get_drvdata(ddev);
- mutex_lock(&dev->lock);
+ switch (type) {
+ case NFC_DIGITAL_CONFIG_RF_TECH:
+ dev->up = true;
+ dev->mode = NFCSIM_MODE_INITIATOR;
+ dev->rf_tech = param;
+ break;
- if (dev->shutting_down || !dev->up || !dev->clone_skb) {
- dev_kfree_skb(dev->clone_skb);
- goto exit;
- }
+ case NFC_DIGITAL_CONFIG_FRAMING:
+ break;
- if (dev->initiator) {
- if (!dev->cb) {
- DEV_ERR(dev, "Null recv callback\n");
- dev_kfree_skb(dev->clone_skb);
- goto exit;
- }
-
- dev->cb(dev->cb_context, dev->clone_skb, 0);
- dev->cb = NULL;
- } else {
- nfc_tm_data_received(dev->nfc_dev, dev->clone_skb);
+ default:
+ NFCSIM_ERR(dev, "Invalid configuration type: %d\n", type);
+ return -EINVAL;
}
-exit:
- dev->clone_skb = NULL;
+ return 0;
+}
- mutex_unlock(&dev->lock);
+static int nfcsim_in_send_cmd(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb, u16 timeout,
+ nfc_digital_cmd_complete_t cb, void *arg)
+{
+ return nfcsim_send(ddev, skb, timeout, cb, arg);
}
-static int nfcsim_tx(struct nfc_dev *nfc_dev, struct nfc_target *target,
- struct sk_buff *skb, data_exchange_cb_t cb,
- void *cb_context)
+static int nfcsim_tg_configure_hw(struct nfc_digital_dev *ddev,
+ int type, int param)
{
- struct nfcsim *dev = nfc_get_drvdata(nfc_dev);
- struct nfcsim *peer = dev->peer_dev;
- int err;
+ struct nfcsim *dev = nfc_digital_get_drvdata(ddev);
- mutex_lock(&dev->lock);
+ switch (type) {
+ case NFC_DIGITAL_CONFIG_RF_TECH:
+ dev->up = true;
+ dev->mode = NFCSIM_MODE_TARGET;
+ dev->rf_tech = param;
+ break;
- if (dev->shutting_down || !dev->up) {
- mutex_unlock(&dev->lock);
- err = -ENODEV;
- goto exit;
+ case NFC_DIGITAL_CONFIG_FRAMING:
+ break;
+
+ default:
+ NFCSIM_ERR(dev, "Invalid configuration type: %d\n", type);
+ return -EINVAL;
}
- dev->cb = cb;
- dev->cb_context = cb_context;
+ return 0;
+}
- mutex_unlock(&dev->lock);
+static int nfcsim_tg_send_cmd(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb, u16 timeout,
+ nfc_digital_cmd_complete_t cb, void *arg)
+{
+ return nfcsim_send(ddev, skb, timeout, cb, arg);
+}
- mutex_lock(&peer->lock);
+static int nfcsim_tg_listen(struct nfc_digital_dev *ddev, u16 timeout,
+ nfc_digital_cmd_complete_t cb, void *arg)
+{
+ return nfcsim_send(ddev, NULL, timeout, cb, arg);
+}
- peer->clone_skb = skb_clone(skb, GFP_KERNEL);
+static struct nfc_digital_ops nfcsim_digital_ops = {
+ .in_configure_hw = nfcsim_in_configure_hw,
+ .in_send_cmd = nfcsim_in_send_cmd,
- if (!peer->clone_skb) {
- DEV_ERR(dev, "skb_clone failed\n");
- mutex_unlock(&peer->lock);
- err = -ENOMEM;
- goto exit;
- }
+ .tg_listen = nfcsim_tg_listen,
+ .tg_configure_hw = nfcsim_tg_configure_hw,
+ .tg_send_cmd = nfcsim_tg_send_cmd,
- /* This simulates an arbitrary transmission delay between the 2 devices.
- * If packet transmission occurs immediately between them, we have a
- * non-stop flow of several tens of thousands SYMM packets per second
- * and a burning cpu.
- */
- queue_delayed_work(wq, &peer->recv_work,
- msecs_to_jiffies(dev->rx_delay));
+ .abort_cmd = nfcsim_abort_cmd,
+ .switch_rf = nfcsim_switch_rf,
+};
+
+static struct dentry *nfcsim_debugfs_root;
- mutex_unlock(&peer->lock);
+static void nfcsim_debugfs_init(void)
+{
+ nfcsim_debugfs_root = debugfs_create_dir("nfcsim", NULL);
- err = 0;
-exit:
- dev_kfree_skb(skb);
+ if (!nfcsim_debugfs_root)
+ pr_err("Could not create debugfs entry\n");
- return err;
}
-static int nfcsim_im_transceive(struct nfc_dev *nfc_dev,
- struct nfc_target *target, struct sk_buff *skb,
- data_exchange_cb_t cb, void *cb_context)
+static void nfcsim_debugfs_remove(void)
{
- return nfcsim_tx(nfc_dev, target, skb, cb, cb_context);
+ debugfs_remove_recursive(nfcsim_debugfs_root);
}
-static int nfcsim_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
+static void nfcsim_debugfs_init_dev(struct nfcsim *dev)
{
- return nfcsim_tx(nfc_dev, NULL, skb, NULL, NULL);
-}
-
-static struct nfc_ops nfcsim_nfc_ops = {
- .dev_up = nfcsim_dev_up,
- .dev_down = nfcsim_dev_down,
- .dep_link_up = nfcsim_dep_link_up,
- .dep_link_down = nfcsim_dep_link_down,
- .start_poll = nfcsim_start_poll,
- .stop_poll = nfcsim_stop_poll,
- .activate_target = nfcsim_activate_target,
- .deactivate_target = nfcsim_deactivate_target,
- .im_transceive = nfcsim_im_transceive,
- .tm_send = nfcsim_tm_send,
-};
+ struct dentry *dev_dir;
+ char devname[5]; /* nfcX\0 */
+ u32 idx;
+ int n;
-static void nfcsim_set_polling_mode(struct nfcsim *dev)
-{
- if (dev->polling_mode == NFCSIM_POLL_NONE) {
- dev->curr_polling_mode = NFCSIM_POLL_NONE;
+ if (!nfcsim_debugfs_root) {
+ NFCSIM_ERR(dev, "nfcsim debugfs not initialized\n");
return;
}
- if (dev->curr_polling_mode == NFCSIM_POLL_NONE) {
- if (dev->polling_mode & NFCSIM_POLL_INITIATOR)
- dev->curr_polling_mode = NFCSIM_POLL_INITIATOR;
- else
- dev->curr_polling_mode = NFCSIM_POLL_TARGET;
-
+ idx = dev->nfc_digital_dev->nfc_dev->idx;
+ n = snprintf(devname, sizeof(devname), "nfc%d", idx);
+ if (n >= sizeof(devname)) {
+ NFCSIM_ERR(dev, "Could not compute dev name for dev %d\n", idx);
return;
}
- if (dev->polling_mode == NFCSIM_POLL_DUAL) {
- if (dev->curr_polling_mode == NFCSIM_POLL_TARGET)
- dev->curr_polling_mode = NFCSIM_POLL_INITIATOR;
- else
- dev->curr_polling_mode = NFCSIM_POLL_TARGET;
+ dev_dir = debugfs_create_dir(devname, nfcsim_debugfs_root);
+ if (!dev_dir) {
+ NFCSIM_ERR(dev, "Could not create debugfs entries for nfc%d\n",
+ idx);
+ return;
}
+
+ debugfs_create_u8("dropframe", 0664, dev_dir, &dev->dropframe);
}
-static void nfcsim_wq_poll(struct work_struct *work)
+static struct nfcsim *nfcsim_device_new(struct nfcsim_link *link_in,
+ struct nfcsim_link *link_out)
{
- struct nfcsim *dev = container_of(work, struct nfcsim, poll_work.work);
- struct nfcsim *peer = dev->peer_dev;
+ struct nfcsim *dev;
+ int rc;
- /* These work items run on an ordered workqueue and are therefore
- * serialized. So we can take both mutexes without being dead locked.
- */
- mutex_lock(&dev->lock);
- mutex_lock(&peer->lock);
+ dev = kzalloc(sizeof(struct nfcsim), GFP_KERNEL);
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
- nfcsim_set_polling_mode(dev);
+ INIT_DELAYED_WORK(&dev->send_work, nfcsim_send_wq);
+ INIT_WORK(&dev->recv_work, nfcsim_recv_wq);
- if (dev->curr_polling_mode == NFCSIM_POLL_NONE) {
- DEV_DBG(dev, "Not polling\n");
- goto unlock;
+ dev->nfc_digital_dev =
+ nfc_digital_allocate_device(&nfcsim_digital_ops,
+ NFC_PROTO_NFC_DEP_MASK,
+ NFCSIM_CAPABILITIES,
+ 0, 0);
+ if (!dev->nfc_digital_dev) {
+ kfree(dev);
+ return ERR_PTR(-ENOMEM);
}
- DEV_DBG(dev, "Polling as %s",
- dev->curr_polling_mode == NFCSIM_POLL_INITIATOR ?
- "initiator\n" : "target\n");
+ nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
- if (dev->curr_polling_mode == NFCSIM_POLL_TARGET)
- goto sched_work;
+ dev->link_in = link_in;
+ dev->link_out = link_out;
- if (peer->curr_polling_mode == NFCSIM_POLL_TARGET) {
- peer->polling_mode = NFCSIM_POLL_NONE;
- dev->polling_mode = NFCSIM_POLL_NONE;
-
- dev->initiator = 1;
-
- nfcsim_target_found(dev);
+ rc = nfc_digital_register_device(dev->nfc_digital_dev);
+ if (rc) {
+ pr_err("Could not register digital device (%d)\n", rc);
+ nfc_digital_free_device(dev->nfc_digital_dev);
+ kfree(dev);
- goto unlock;
+ return ERR_PTR(rc);
}
-sched_work:
- /* This defines the delay for an initiator to check if the other device
- * is polling in target mode.
- * If the device starts in dual mode polling, it switches between
- * initiator and target at every round.
- * Because the wq is ordered and only 1 work item is executed at a time,
- * we'll always have one device polling as initiator and the other as
- * target at some point, even if both are started in dual mode.
- */
- queue_delayed_work(wq, &dev->poll_work, msecs_to_jiffies(200));
+ nfcsim_debugfs_init_dev(dev);
-unlock:
- mutex_unlock(&peer->lock);
- mutex_unlock(&dev->lock);
+ return dev;
}
-static struct nfcsim *nfcsim_init_dev(void)
+static void nfcsim_device_free(struct nfcsim *dev)
{
- struct nfcsim *dev;
- int rc = -ENOMEM;
+ nfc_digital_unregister_device(dev->nfc_digital_dev);
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (dev == NULL)
- return ERR_PTR(-ENOMEM);
+ dev->up = false;
- mutex_init(&dev->lock);
+ nfcsim_link_shutdown(dev->link_in);
- INIT_DELAYED_WORK(&dev->recv_work, nfcsim_wq_recv);
- INIT_DELAYED_WORK(&dev->poll_work, nfcsim_wq_poll);
+ cancel_delayed_work_sync(&dev->send_work);
+ cancel_work_sync(&dev->recv_work);
- dev->nfc_dev = nfc_allocate_device(&nfcsim_nfc_ops,
- NFC_PROTO_NFC_DEP_MASK,
- 0, 0);
- if (!dev->nfc_dev)
- goto error;
+ nfc_digital_free_device(dev->nfc_digital_dev);
- nfc_set_drvdata(dev->nfc_dev, dev);
-
- rc = nfc_register_device(dev->nfc_dev);
- if (rc)
- goto free_nfc_dev;
-
- dev->rx_delay = RX_DEFAULT_DELAY;
- return dev;
-
-free_nfc_dev:
- nfc_free_device(dev->nfc_dev);
-
-error:
kfree(dev);
-
- return ERR_PTR(rc);
}
-static void nfcsim_free_device(struct nfcsim *dev)
-{
- nfc_unregister_device(dev->nfc_dev);
-
- nfc_free_device(dev->nfc_dev);
-
- kfree(dev);
-}
+static struct nfcsim *dev0;
+static struct nfcsim *dev1;
static int __init nfcsim_init(void)
{
+ struct nfcsim_link *link0, *link1;
int rc;
- /* We need an ordered wq to ensure that poll_work items are executed
- * one at a time.
- */
- wq = alloc_ordered_workqueue("nfcsim", 0);
- if (!wq) {
+ link0 = nfcsim_link_new();
+ link1 = nfcsim_link_new();
+ if (!link0 || !link1) {
rc = -ENOMEM;
- goto exit;
+ goto exit_err;
}
- dev0 = nfcsim_init_dev();
+ nfcsim_debugfs_init();
+
+ dev0 = nfcsim_device_new(link0, link1);
if (IS_ERR(dev0)) {
rc = PTR_ERR(dev0);
- goto exit;
+ goto exit_err;
}
- dev1 = nfcsim_init_dev();
+ dev1 = nfcsim_device_new(link1, link0);
if (IS_ERR(dev1)) {
- kfree(dev0);
+ nfcsim_device_free(dev0);
rc = PTR_ERR(dev1);
- goto exit;
+ goto exit_err;
}
- dev0->peer_dev = dev1;
- dev1->peer_dev = dev0;
+ pr_info("nfcsim " NFCSIM_VERSION " initialized\n");
+
+ return 0;
- pr_debug("NFCsim " NFCSIM_VERSION " initialized\n");
+exit_err:
+ pr_err("Failed to initialize nfcsim driver (%d)\n", rc);
- rc = 0;
-exit:
- if (rc)
- pr_err("Failed to initialize nfcsim driver (%d)\n",
- rc);
+ nfcsim_link_free(link0);
+ nfcsim_link_free(link1);
return rc;
}
static void __exit nfcsim_exit(void)
{
- nfcsim_cleanup_dev(dev0, 1);
- nfcsim_cleanup_dev(dev1, 1);
+ struct nfcsim_link *link0, *link1;
+
+ link0 = dev0->link_in;
+ link1 = dev0->link_out;
+
+ nfcsim_device_free(dev0);
+ nfcsim_device_free(dev1);
- nfcsim_free_device(dev0);
- nfcsim_free_device(dev1);
+ nfcsim_link_free(link0);
+ nfcsim_link_free(link1);
- destroy_workqueue(wq);
+ nfcsim_debugfs_remove();
}
module_init(nfcsim_init);
diff --git a/drivers/nfc/pn533/usb.c b/drivers/nfc/pn533/usb.c
index 8ca060324b6a..33ed78be2750 100644
--- a/drivers/nfc/pn533/usb.c
+++ b/drivers/nfc/pn533/usb.c
@@ -464,10 +464,8 @@ static int pn533_usb_probe(struct usb_interface *interface,
return -ENOMEM;
in_buf = kzalloc(in_buf_len, GFP_KERNEL);
- if (!in_buf) {
- rc = -ENOMEM;
- goto out_free_phy;
- }
+ if (!in_buf)
+ return -ENOMEM;
phy->udev = usb_get_dev(interface_to_usbdev(interface));
phy->interface = interface;
@@ -554,8 +552,7 @@ error:
usb_free_urb(phy->out_urb);
usb_put_dev(phy->udev);
kfree(in_buf);
-out_free_phy:
- kfree(phy);
+
return rc;
}
diff --git a/drivers/nfc/port100.c b/drivers/nfc/port100.c
index 87d509996704..2b2330b235e6 100644
--- a/drivers/nfc/port100.c
+++ b/drivers/nfc/port100.c
@@ -343,7 +343,26 @@ in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
},
[NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
/* nfc_digital_framing_nfcf */
- { PORT100_IN_PROT_END, 0 },
+ { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 },
+ { PORT100_IN_PROT_ADD_CRC, 1 },
+ { PORT100_IN_PROT_CHECK_CRC, 1 },
+ { PORT100_IN_PROT_MULTI_CARD, 0 },
+ { PORT100_IN_PROT_ADD_PARITY, 0 },
+ { PORT100_IN_PROT_CHECK_PARITY, 0 },
+ { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
+ { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
+ { PORT100_IN_PROT_CRYPTO1, 0 },
+ { PORT100_IN_PROT_ADD_SOF, 0 },
+ { PORT100_IN_PROT_CHECK_SOF, 0 },
+ { PORT100_IN_PROT_ADD_EOF, 0 },
+ { PORT100_IN_PROT_CHECK_EOF, 0 },
+ { PORT100_IN_PROT_DEAF_TIME, 4 },
+ { PORT100_IN_PROT_CRM, 0 },
+ { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
+ { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
+ { PORT100_IN_PROT_RFCA, 0 },
+ { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
+ { PORT100_IN_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
{ PORT100_IN_PROT_END, 0 },
@@ -437,6 +456,12 @@ struct port100 {
struct urb *out_urb;
struct urb *in_urb;
+ /* This mutex protects the out_urb and avoids to submit a new command
+ * through port100_send_frame_async() while the previous one is being
+ * canceled through port100_abort_cmd().
+ */
+ struct mutex out_urb_lock;
+
struct work_struct cmd_complete_work;
u8 cmd_type;
@@ -445,6 +470,9 @@ struct port100 {
* for any queuing/locking mechanism at driver level.
*/
struct port100_cmd *cmd;
+
+ bool cmd_cancel;
+ struct completion cmd_cancel_done;
};
struct port100_cmd {
@@ -699,10 +727,27 @@ static int port100_send_ack(struct port100 *dev)
{
int rc;
+ mutex_lock(&dev->out_urb_lock);
+
+ init_completion(&dev->cmd_cancel_done);
+
+ usb_kill_urb(dev->out_urb);
+
dev->out_urb->transfer_buffer = ack_frame;
dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
+ /* Set the cmd_cancel flag only if the URB has been successfully
+ * submitted. It will be reset by the out URB completion callback
+ * port100_send_complete().
+ */
+ dev->cmd_cancel = !rc;
+
+ mutex_unlock(&dev->out_urb_lock);
+
+ if (!rc)
+ wait_for_completion(&dev->cmd_cancel_done);
+
return rc;
}
@@ -711,6 +756,16 @@ static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
{
int rc;
+ mutex_lock(&dev->out_urb_lock);
+
+ /* A command cancel frame as been sent through dev->out_urb. Don't try
+ * to submit a new one.
+ */
+ if (dev->cmd_cancel) {
+ rc = -EAGAIN;
+ goto exit;
+ }
+
dev->out_urb->transfer_buffer = out->data;
dev->out_urb->transfer_buffer_length = out->len;
@@ -722,16 +777,15 @@ static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
if (rc)
- return rc;
+ goto exit;
rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
if (rc)
- goto error;
+ usb_unlink_urb(dev->out_urb);
- return 0;
+exit:
+ mutex_unlock(&dev->out_urb_lock);
-error:
- usb_unlink_urb(dev->out_urb);
return rc;
}
@@ -790,6 +844,12 @@ static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
PORT100_FRAME_MAX_PAYLOAD_LEN +
PORT100_FRAME_TAIL_LEN;
+ if (dev->cmd) {
+ nfc_err(&dev->interface->dev,
+ "A command is still in process\n");
+ return -EBUSY;
+ }
+
resp = alloc_skb(resp_len, GFP_KERNEL);
if (!resp)
return -ENOMEM;
@@ -867,6 +927,11 @@ static void port100_send_complete(struct urb *urb)
{
struct port100 *dev = urb->context;
+ if (dev->cmd_cancel) {
+ dev->cmd_cancel = false;
+ complete(&dev->cmd_cancel_done);
+ }
+
switch (urb->status) {
case 0:
break; /* success */
@@ -985,6 +1050,10 @@ static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
*skb_put(skb, 1) = on ? 1 : 0;
+ /* Cancel the last command if the device is being switched off */
+ if (!on)
+ port100_abort_cmd(ddev);
+
resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
if (IS_ERR(resp))
@@ -1430,6 +1499,7 @@ static int port100_probe(struct usb_interface *interface,
if (!dev)
return -ENOMEM;
+ mutex_init(&dev->out_urb_lock);
dev->udev = usb_get_dev(interface_to_usbdev(interface));
dev->interface = interface;
usb_set_intfdata(interface, dev);
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index 10842b7051b3..26c9dbbccb0c 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -1048,6 +1048,10 @@ static int trf7970a_init(struct trf7970a *trf)
if (ret)
goto err_out;
+ ret = trf7970a_write(trf, TRF7970A_NFC_TARGET_LEVEL, 0);
+ if (ret)
+ goto err_out;
+
usleep_range(1000, 2000);
trf->chip_status_ctrl &= ~TRF7970A_CHIP_STATUS_RF_ON;