diff options
Diffstat (limited to 'net/nfc')
-rw-r--r-- | net/nfc/core.c | 224 | ||||
-rw-r--r-- | net/nfc/hci/core.c | 75 | ||||
-rw-r--r-- | net/nfc/llcp.h | 3 | ||||
-rw-r--r-- | net/nfc/llcp_commands.c | 22 | ||||
-rw-r--r-- | net/nfc/llcp_core.c | 16 | ||||
-rw-r--r-- | net/nfc/llcp_sock.c | 19 | ||||
-rw-r--r-- | net/nfc/nci/Kconfig | 11 | ||||
-rw-r--r-- | net/nfc/nci/Makefile | 4 | ||||
-rw-r--r-- | net/nfc/nci/core.c | 37 | ||||
-rw-r--r-- | net/nfc/nci/data.c | 2 | ||||
-rw-r--r-- | net/nfc/nci/spi.c | 378 | ||||
-rw-r--r-- | net/nfc/netlink.c | 183 | ||||
-rw-r--r-- | net/nfc/nfc.h | 11 |
13 files changed, 920 insertions, 65 deletions
diff --git a/net/nfc/core.c b/net/nfc/core.c index 40d2527693d..1d074dd1650 100644 --- a/net/nfc/core.c +++ b/net/nfc/core.c @@ -44,6 +44,47 @@ DEFINE_MUTEX(nfc_devlist_mutex); /* NFC device ID bitmap */ static DEFINE_IDA(nfc_index_ida); +int nfc_fw_download(struct nfc_dev *dev, const char *firmware_name) +{ + int rc = 0; + + pr_debug("%s do firmware %s\n", dev_name(&dev->dev), firmware_name); + + device_lock(&dev->dev); + + if (!device_is_registered(&dev->dev)) { + rc = -ENODEV; + goto error; + } + + if (dev->dev_up) { + rc = -EBUSY; + goto error; + } + + if (!dev->ops->fw_download) { + rc = -EOPNOTSUPP; + goto error; + } + + dev->fw_download_in_progress = true; + rc = dev->ops->fw_download(dev, firmware_name); + if (rc) + dev->fw_download_in_progress = false; + +error: + device_unlock(&dev->dev); + return rc; +} + +int nfc_fw_download_done(struct nfc_dev *dev, const char *firmware_name) +{ + dev->fw_download_in_progress = false; + + return nfc_genl_fw_download_done(dev, firmware_name); +} +EXPORT_SYMBOL(nfc_fw_download_done); + /** * nfc_dev_up - turn on the NFC device * @@ -69,6 +110,11 @@ int nfc_dev_up(struct nfc_dev *dev) goto error; } + if (dev->fw_download_in_progress) { + rc = -EBUSY; + goto error; + } + if (dev->dev_up) { rc = -EALREADY; goto error; @@ -80,6 +126,13 @@ int nfc_dev_up(struct nfc_dev *dev) if (!rc) dev->dev_up = true; + /* We have to enable the device before discovering SEs */ + if (dev->ops->discover_se) { + rc = dev->ops->discover_se(dev); + if (!rc) + pr_warn("SE discovery failed\n"); + } + error: device_unlock(&dev->dev); return rc; @@ -475,6 +528,108 @@ error: return rc; } +static struct nfc_se *find_se(struct nfc_dev *dev, u32 se_idx) +{ + struct nfc_se *se, *n; + + list_for_each_entry_safe(se, n, &dev->secure_elements, list) + if (se->idx == se_idx) + return se; + + return NULL; +} + +int nfc_enable_se(struct nfc_dev *dev, u32 se_idx) +{ + + struct nfc_se *se; + int rc; + + pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); + + device_lock(&dev->dev); + + if (!device_is_registered(&dev->dev)) { + rc = -ENODEV; + goto error; + } + + if (!dev->dev_up) { + rc = -ENODEV; + goto error; + } + + if (dev->polling) { + rc = -EBUSY; + goto error; + } + + if (!dev->ops->enable_se || !dev->ops->disable_se) { + rc = -EOPNOTSUPP; + goto error; + } + + se = find_se(dev, se_idx); + if (!se) { + rc = -EINVAL; + goto error; + } + + if (se->type == NFC_SE_ENABLED) { + rc = -EALREADY; + goto error; + } + + rc = dev->ops->enable_se(dev, se_idx); + +error: + device_unlock(&dev->dev); + return rc; +} + +int nfc_disable_se(struct nfc_dev *dev, u32 se_idx) +{ + + struct nfc_se *se; + int rc; + + pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); + + device_lock(&dev->dev); + + if (!device_is_registered(&dev->dev)) { + rc = -ENODEV; + goto error; + } + + if (!dev->dev_up) { + rc = -ENODEV; + goto error; + } + + if (!dev->ops->enable_se || !dev->ops->disable_se) { + rc = -EOPNOTSUPP; + goto error; + } + + se = find_se(dev, se_idx); + if (!se) { + rc = -EINVAL; + goto error; + } + + if (se->type == NFC_SE_DISABLED) { + rc = -EALREADY; + goto error; + } + + rc = dev->ops->disable_se(dev, se_idx); + +error: + device_unlock(&dev->dev); + return rc; +} + int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len) { pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len); @@ -707,14 +862,79 @@ inline void nfc_driver_failure(struct nfc_dev *dev, int err) } EXPORT_SYMBOL(nfc_driver_failure); +int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type) +{ + struct nfc_se *se; + int rc; + + pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); + + se = find_se(dev, se_idx); + if (se) + return -EALREADY; + + se = kzalloc(sizeof(struct nfc_se), GFP_KERNEL); + if (!se) + return -ENOMEM; + + se->idx = se_idx; + se->type = type; + se->state = NFC_SE_DISABLED; + INIT_LIST_HEAD(&se->list); + + list_add(&se->list, &dev->secure_elements); + + rc = nfc_genl_se_added(dev, se_idx, type); + if (rc < 0) { + list_del(&se->list); + kfree(se); + + return rc; + } + + return 0; +} +EXPORT_SYMBOL(nfc_add_se); + +int nfc_remove_se(struct nfc_dev *dev, u32 se_idx) +{ + struct nfc_se *se, *n; + int rc; + + pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); + + list_for_each_entry_safe(se, n, &dev->secure_elements, list) + if (se->idx == se_idx) { + rc = nfc_genl_se_removed(dev, se_idx); + if (rc < 0) + return rc; + + list_del(&se->list); + kfree(se); + + return 0; + } + + return -EINVAL; +} +EXPORT_SYMBOL(nfc_remove_se); + static void nfc_release(struct device *d) { struct nfc_dev *dev = to_nfc_dev(d); + struct nfc_se *se, *n; pr_debug("dev_name=%s\n", dev_name(&dev->dev)); nfc_genl_data_exit(&dev->genl_data); kfree(dev->targets); + + list_for_each_entry_safe(se, n, &dev->secure_elements, list) { + nfc_genl_se_removed(dev, se->idx); + list_del(&se->list); + kfree(se); + } + kfree(dev); } @@ -786,7 +1006,6 @@ struct nfc_dev *nfc_get_device(unsigned int idx) */ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, u32 supported_protocols, - u32 supported_se, int tx_headroom, int tx_tailroom) { struct nfc_dev *dev; @@ -804,10 +1023,9 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, dev->ops = ops; dev->supported_protocols = supported_protocols; - dev->supported_se = supported_se; - dev->active_se = NFC_SE_NONE; dev->tx_headroom = tx_headroom; dev->tx_tailroom = tx_tailroom; + INIT_LIST_HEAD(&dev->secure_elements); nfc_genl_data_init(&dev->genl_data); diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c index 91020b210d8..fe66908401f 100644 --- a/net/nfc/hci/core.c +++ b/net/nfc/hci/core.c @@ -570,21 +570,21 @@ static int hci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, { struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); - if (hdev->ops->dep_link_up) - return hdev->ops->dep_link_up(hdev, target, comm_mode, - gb, gb_len); + if (!hdev->ops->dep_link_up) + return 0; - return 0; + return hdev->ops->dep_link_up(hdev, target, comm_mode, + gb, gb_len); } static int hci_dep_link_down(struct nfc_dev *nfc_dev) { struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); - if (hdev->ops->dep_link_down) - return hdev->ops->dep_link_down(hdev); + if (!hdev->ops->dep_link_down) + return 0; - return 0; + return hdev->ops->dep_link_down(hdev); } static int hci_activate_target(struct nfc_dev *nfc_dev, @@ -673,12 +673,12 @@ static int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) { struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); - if (hdev->ops->tm_send) - return hdev->ops->tm_send(hdev, skb); - - kfree_skb(skb); + if (!hdev->ops->tm_send) { + kfree_skb(skb); + return -ENOTSUPP; + } - return -ENOTSUPP; + return hdev->ops->tm_send(hdev, skb); } static int hci_check_presence(struct nfc_dev *nfc_dev, @@ -686,8 +686,38 @@ static int hci_check_presence(struct nfc_dev *nfc_dev, { struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); - if (hdev->ops->check_presence) - return hdev->ops->check_presence(hdev, target); + if (!hdev->ops->check_presence) + return 0; + + return hdev->ops->check_presence(hdev, target); +} + +static int hci_discover_se(struct nfc_dev *nfc_dev) +{ + struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); + + if (hdev->ops->discover_se) + return hdev->ops->discover_se(hdev); + + return 0; +} + +static int hci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx) +{ + struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); + + if (hdev->ops->enable_se) + return hdev->ops->enable_se(hdev, se_idx); + + return 0; +} + +static int hci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx) +{ + struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); + + if (hdev->ops->disable_se) + return hdev->ops->enable_se(hdev, se_idx); return 0; } @@ -779,6 +809,16 @@ static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb) } } +static int hci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name) +{ + struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); + + if (!hdev->ops->fw_download) + return -ENOTSUPP; + + return hdev->ops->fw_download(hdev, firmware_name); +} + static struct nfc_ops hci_nfc_ops = { .dev_up = hci_dev_up, .dev_down = hci_dev_down, @@ -791,13 +831,16 @@ static struct nfc_ops hci_nfc_ops = { .im_transceive = hci_transceive, .tm_send = hci_tm_send, .check_presence = hci_check_presence, + .fw_download = hci_fw_download, + .discover_se = hci_discover_se, + .enable_se = hci_enable_se, + .disable_se = hci_disable_se, }; struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops, struct nfc_hci_init_data *init_data, unsigned long quirks, u32 protocols, - u32 supported_se, const char *llc_name, int tx_headroom, int tx_tailroom, @@ -823,7 +866,7 @@ struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops, return NULL; } - hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols, supported_se, + hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols, tx_headroom + HCI_CMDS_HEADROOM, tx_tailroom); if (!hdev->ndev) { diff --git a/net/nfc/llcp.h b/net/nfc/llcp.h index ff8c434f7df..f4d48b57ea1 100644 --- a/net/nfc/llcp.h +++ b/net/nfc/llcp.h @@ -19,6 +19,8 @@ enum llcp_state { LLCP_CONNECTED = 1, /* wait_for_packet() wants that */ + LLCP_CONNECTING, + LLCP_DISCONNECTING, LLCP_CLOSED, LLCP_BOUND, LLCP_LISTEN, @@ -246,7 +248,6 @@ struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri, void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp); void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head); void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); -int nfc_llcp_disconnect(struct nfc_llcp_sock *sock); int nfc_llcp_send_symm(struct nfc_dev *dev); int nfc_llcp_send_connect(struct nfc_llcp_sock *sock); int nfc_llcp_send_cc(struct nfc_llcp_sock *sock); diff --git a/net/nfc/llcp_commands.c b/net/nfc/llcp_commands.c index c1b23eef83c..1017894807c 100644 --- a/net/nfc/llcp_commands.c +++ b/net/nfc/llcp_commands.c @@ -339,7 +339,7 @@ static struct sk_buff *llcp_allocate_pdu(struct nfc_llcp_sock *sock, return skb; } -int nfc_llcp_disconnect(struct nfc_llcp_sock *sock) +int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock) { struct sk_buff *skb; struct nfc_dev *dev; @@ -630,26 +630,6 @@ int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason) return 0; } -int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock) -{ - struct sk_buff *skb; - struct nfc_llcp_local *local; - - pr_debug("Send DISC\n"); - - local = sock->local; - if (local == NULL) - return -ENODEV; - - skb = llcp_allocate_pdu(sock, LLCP_PDU_DISC, 0); - if (skb == NULL) - return -ENOMEM; - - skb_queue_head(&local->tx_queue, skb); - - return 0; -} - int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, struct msghdr *msg, size_t len) { diff --git a/net/nfc/llcp_core.c b/net/nfc/llcp_core.c index 158bdbf668c..81cd3416c7d 100644 --- a/net/nfc/llcp_core.c +++ b/net/nfc/llcp_core.c @@ -537,6 +537,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local) u8 *lto_tlv, lto_length; u8 *wks_tlv, wks_length; u8 *miux_tlv, miux_length; + __be16 wks = cpu_to_be16(local->local_wks); u8 gb_len = 0; int ret = 0; @@ -549,8 +550,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local) gb_len += lto_length; pr_debug("Local wks 0x%lx\n", local->local_wks); - wks_tlv = nfc_llcp_build_tlv(LLCP_TLV_WKS, (u8 *)&local->local_wks, 2, - &wks_length); + wks_tlv = nfc_llcp_build_tlv(LLCP_TLV_WKS, (u8 *)&wks, 2, &wks_length); gb_len += wks_length; miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0, @@ -719,6 +719,10 @@ static void nfc_llcp_tx_work(struct work_struct *work) llcp_sock = nfc_llcp_sock(sk); if (llcp_sock == NULL && nfc_llcp_ptype(skb) == LLCP_PDU_I) { + kfree_skb(skb); + nfc_llcp_send_symm(local->dev); + } else if (llcp_sock && !llcp_sock->remote_ready) { + skb_queue_head(&local->tx_queue, skb); nfc_llcp_send_symm(local->dev); } else { struct sk_buff *copy_skb = NULL; @@ -730,6 +734,13 @@ static void nfc_llcp_tx_work(struct work_struct *work) DUMP_PREFIX_OFFSET, 16, 1, skb->data, skb->len, true); + if (ptype == LLCP_PDU_DISC && sk != NULL && + sk->sk_state == LLCP_DISCONNECTING) { + nfc_llcp_sock_unlink(&local->sockets, sk); + sock_orphan(sk); + sock_put(sk); + } + if (ptype == LLCP_PDU_I) copy_skb = skb_copy(skb, GFP_ATOMIC); @@ -1579,6 +1590,7 @@ int nfc_llcp_register_device(struct nfc_dev *ndev) local->lto = 150; /* 1500 ms */ local->rw = LLCP_MAX_RW; local->miux = cpu_to_be16(LLCP_MAX_MIUX); + local->local_wks = 0x1; /* LLC Link Management */ nfc_llcp_build_gb(local); diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c index 380253eccb7..d308402b67d 100644 --- a/net/nfc/llcp_sock.c +++ b/net/nfc/llcp_sock.c @@ -571,7 +571,7 @@ static unsigned int llcp_sock_poll(struct file *file, struct socket *sock, if (sk->sk_shutdown == SHUTDOWN_MASK) mask |= POLLHUP; - if (sock_writeable(sk)) + if (sock_writeable(sk) && sk->sk_state == LLCP_CONNECTED) mask |= POLLOUT | POLLWRNORM | POLLWRBAND; else set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); @@ -603,7 +603,7 @@ static int llcp_sock_release(struct socket *sock) /* Send a DISC */ if (sk->sk_state == LLCP_CONNECTED) - nfc_llcp_disconnect(llcp_sock); + nfc_llcp_send_disconnect(llcp_sock); if (sk->sk_state == LLCP_LISTEN) { struct nfc_llcp_sock *lsk, *n; @@ -614,7 +614,7 @@ static int llcp_sock_release(struct socket *sock) accept_sk = &lsk->sk; lock_sock(accept_sk); - nfc_llcp_disconnect(lsk); + nfc_llcp_send_disconnect(lsk); nfc_llcp_accept_unlink(accept_sk); release_sock(accept_sk); @@ -626,6 +626,13 @@ static int llcp_sock_release(struct socket *sock) release_sock(sk); + /* Keep this sock alive and therefore do not remove it from the sockets + * list until the DISC PDU has been actually sent. Otherwise we would + * reply with DM PDUs before sending the DISC one. + */ + if (sk->sk_state == LLCP_DISCONNECTING) + return err; + if (sock->type == SOCK_RAW) nfc_llcp_sock_unlink(&local->raw_sockets, sk); else @@ -722,14 +729,16 @@ static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr, if (ret) goto sock_unlink; + sk->sk_state = LLCP_CONNECTING; + ret = sock_wait_state(sk, LLCP_CONNECTED, sock_sndtimeo(sk, flags & O_NONBLOCK)); - if (ret) + if (ret && ret != -EINPROGRESS) goto sock_unlink; release_sock(sk); - return 0; + return ret; sock_unlink: nfc_llcp_put_ssap(local, llcp_sock->ssap); diff --git a/net/nfc/nci/Kconfig b/net/nfc/nci/Kconfig index 6d69b5f0f19..a4f1e42e348 100644 --- a/net/nfc/nci/Kconfig +++ b/net/nfc/nci/Kconfig @@ -8,3 +8,14 @@ config NFC_NCI Say Y here to compile NCI support into the kernel or say M to compile it as module (nci). + +config NFC_NCI_SPI + depends on NFC_NCI && SPI + select CRC_CCITT + bool "NCI over SPI protocol support" + default n + help + NCI (NFC Controller Interface) is a communication protocol between + an NFC Controller (NFCC) and a Device Host (DH). + + Say yes if you use an NCI driver that requires SPI link layer. diff --git a/net/nfc/nci/Makefile b/net/nfc/nci/Makefile index cdb3a2e4447..7aeedc43187 100644 --- a/net/nfc/nci/Makefile +++ b/net/nfc/nci/Makefile @@ -4,4 +4,6 @@ obj-$(CONFIG_NFC_NCI) += nci.o -nci-objs := core.o data.o lib.o ntf.o rsp.o
\ No newline at end of file +nci-objs := core.o data.o lib.o ntf.o rsp.o + +nci-$(CONFIG_NFC_NCI_SPI) += spi.o diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c index 48ada0ec749..b943d46a164 100644 --- a/net/nfc/nci/core.c +++ b/net/nfc/nci/core.c @@ -636,6 +636,21 @@ static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target, return rc; } +static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx) +{ + return 0; +} + +static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx) +{ + return 0; +} + +static int nci_discover_se(struct nfc_dev *nfc_dev) +{ + return 0; +} + static struct nfc_ops nci_nfc_ops = { .dev_up = nci_dev_up, .dev_down = nci_dev_down, @@ -646,6 +661,9 @@ static struct nfc_ops nci_nfc_ops = { .activate_target = nci_activate_target, .deactivate_target = nci_deactivate_target, .im_transceive = nci_transceive, + .enable_se = nci_enable_se, + .disable_se = nci_disable_se, + .discover_se = nci_discover_se, }; /* ---- Interface to NCI drivers ---- */ @@ -658,7 +676,6 @@ static struct nfc_ops nci_nfc_ops = { */ struct nci_dev *nci_allocate_device(struct nci_ops *ops, __u32 supported_protocols, - __u32 supported_se, int tx_headroom, int tx_tailroom) { struct nci_dev *ndev; @@ -681,7 +698,6 @@ struct nci_dev *nci_allocate_device(struct nci_ops *ops, ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops, supported_protocols, - supported_se, tx_headroom + NCI_DATA_HDR_SIZE, tx_tailroom); if (!ndev->nfc_dev) @@ -797,12 +813,11 @@ EXPORT_SYMBOL(nci_unregister_device); /** * nci_recv_frame - receive frame from NCI drivers * + * @ndev: The nci device * @skb: The sk_buff to receive */ -int nci_recv_frame(struct sk_buff *skb) +int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb) { - struct nci_dev *ndev = (struct nci_dev *) skb->dev; - pr_debug("len %d\n", skb->len); if (!ndev || (!test_bit(NCI_UP, &ndev->flags) && @@ -819,10 +834,8 @@ int nci_recv_frame(struct sk_buff *skb) } EXPORT_SYMBOL(nci_recv_frame); -static int nci_send_frame(struct sk_buff *skb) +static int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb) { - struct nci_dev *ndev = (struct nci_dev *) skb->dev; - pr_debug("len %d\n", skb->len); if (!ndev) { @@ -833,7 +846,7 @@ static int nci_send_frame(struct sk_buff *skb) /* Get rid of skb owner, prior to sending to the driver. */ skb_orphan(skb); - return ndev->ops->send(skb); + return ndev->ops->send(ndev, skb); } /* Send NCI command */ @@ -861,8 +874,6 @@ int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload) if (plen) memcpy(skb_put(skb, plen), payload, plen); - skb->dev = (void *) ndev; - skb_queue_tail(&ndev->cmd_q, skb); queue_work(ndev->cmd_wq, &ndev->cmd_work); @@ -894,7 +905,7 @@ static void nci_tx_work(struct work_struct *work) nci_conn_id(skb->data), nci_plen(skb->data)); - nci_send_frame(skb); + nci_send_frame(ndev, skb); mod_timer(&ndev->data_timer, jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT)); @@ -963,7 +974,7 @@ static void nci_cmd_work(struct work_struct *work) nci_opcode_oid(nci_opcode(skb->data)), nci_plen(skb->data)); - nci_send_frame(skb); + nci_send_frame(ndev, skb); mod_timer(&ndev->cmd_timer, jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT)); diff --git a/net/nfc/nci/data.c b/net/nfc/nci/data.c index 76c48c5324f..2a9399dd6c6 100644 --- a/net/nfc/nci/data.c +++ b/net/nfc/nci/data.c @@ -80,8 +80,6 @@ static inline void nci_push_data_hdr(struct nci_dev *ndev, nci_mt_set((__u8 *)hdr, NCI_MT_DATA_PKT); nci_pbf_set((__u8 *)hdr, pbf); - - skb->dev = (void *) ndev; } static int nci_queue_tx_data_frags(struct nci_dev *ndev, diff --git a/net/nfc/nci/spi.c b/net/nfc/nci/spi.c new file mode 100644 index 00000000000..c7cf37ba729 --- /dev/null +++ b/net/nfc/nci/spi.c @@ -0,0 +1,378 @@ +/* + * Copyright (C) 2013 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#define pr_fmt(fmt) "nci_spi: %s: " fmt, __func__ + +#include <linux/export.h> +#include <linux/spi/spi.h> +#include <linux/crc-ccitt.h> +#include <linux/nfc.h> +#include <net/nfc/nci_core.h> + +#define NCI_SPI_HDR_LEN 4 +#define NCI_SPI_CRC_LEN 2 +#define NCI_SPI_ACK_SHIFT 6 +#define NCI_SPI_MSB_PAYLOAD_MASK 0x3F + +#define NCI_SPI_SEND_TIMEOUT (NCI_CMD_TIMEOUT > NCI_DATA_TIMEOUT ? \ + NCI_CMD_TIMEOUT : NCI_DATA_TIMEOUT) + +#define NCI_SPI_DIRECT_WRITE 0x01 +#define NCI_SPI_DIRECT_READ 0x02 + +#define ACKNOWLEDGE_NONE 0 +#define ACKNOWLEDGE_ACK 1 +#define ACKNOWLEDGE_NACK 2 + +#define CRC_INIT 0xFFFF + +static int nci_spi_open(struct nci_dev *nci_dev) +{ + struct nci_spi_dev *ndev = nci_get_drvdata(nci_dev); + + return ndev->ops->open(ndev); +} + +static int nci_spi_close(struct nci_dev *nci_dev) +{ + struct nci_spi_dev *ndev = nci_get_drvdata(nci_dev); + + return ndev->ops->close(ndev); +} + +static int __nci_spi_send(struct nci_spi_dev *ndev, struct sk_buff *skb) +{ + struct spi_message m; + struct spi_transfer t; + + t.tx_buf = skb->data; + t.len = skb->len; + t.cs_change = 0; + t.delay_usecs = ndev->xfer_udelay; + + spi_message_init(&m); + spi_message_add_tail(&t, &m); + + return spi_sync(ndev->spi, &m); +} + +static int nci_spi_send(struct nci_dev *nci_dev, struct sk_buff *skb) +{ + struct nci_spi_dev *ndev = nci_get_drvdata(nci_dev); + unsigned int payload_len = skb->len; + unsigned char *hdr; + int ret; + long completion_rc; + + ndev->ops->deassert_int(ndev); + + /* add the NCI SPI header to the start of the buffer */ + hdr = skb_push(skb, NCI_SPI_HDR_LEN); + hdr[0] = NCI_SPI_DIRECT_WRITE; + hdr[1] = ndev->acknowledge_mode; + hdr[2] = payload_len >> 8; + hdr[3] = payload_len & 0xFF; + + if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED) { + u16 crc; + + crc = crc_ccitt(CRC_INIT, skb->data, skb->len); + *skb_put(skb, 1) = crc >> 8; + *skb_put(skb, 1) = crc & 0xFF; + } + + ret = __nci_spi_send(ndev, skb); + + kfree_skb(skb); + ndev->ops->assert_int(ndev); + + if (ret != 0 || ndev->acknowledge_mode == NCI_SPI_CRC_DISABLED) + goto done; + + init_completion(&ndev->req_completion); + completion_rc = + wait_for_completion_interruptible_timeout(&ndev->req_completion, + NCI_SPI_SEND_TIMEOUT); + + if (completion_rc <= 0 || ndev->req_result == ACKNOWLEDGE_NACK) + ret = -EIO; + +done: + return ret; +} + +static struct nci_ops nci_spi_ops = { + .open = nci_spi_open, + .close = nci_spi_close, + .send = nci_spi_send, +}; + +/* ---- Interface to NCI SPI drivers ---- */ + +/** + * nci_spi_allocate_device - allocate a new nci spi device + * + * @spi: SPI device + * @ops: device operations + * @supported_protocols: NFC protocols supported by the device + * @supported_se: NFC Secure Elements supported by the device + * @acknowledge_mode: Acknowledge mode used by the device + * @delay: delay between transactions in us + */ +struct nci_spi_dev *nci_spi_allocate_device(struct spi_device *spi, + struct nci_spi_ops *ops, + u32 supported_protocols, + u32 supported_se, + u8 acknowledge_mode, + unsigned int delay) +{ + struct nci_spi_dev *ndev; + int tailroom = 0; + + if (!ops->open || !ops->close || !ops->assert_int || !ops->deassert_int) + return NULL; + + if (!supported_protocols) + return NULL; + + ndev = devm_kzalloc(&spi->dev, sizeof(struct nci_dev), GFP_KERNEL); + if (!ndev) + return NULL; + + ndev->ops = ops; + ndev->acknowledge_mode = acknowledge_mode; + ndev->xfer_udelay = delay; + + if (acknowledge_mode == NCI_SPI_CRC_ENABLED) + tailroom += NCI_SPI_CRC_LEN; + + ndev->nci_dev = nci_allocate_device(&nci_spi_ops, supported_protocols, + NCI_SPI_HDR_LEN, tailroom); + if (!ndev->nci_dev) + return NULL; + + nci_set_drvdata(ndev->nci_dev, ndev); + + return ndev; +} +EXPORT_SYMBOL_GPL(nci_spi_allocate_device); + +/** + * nci_spi_free_device - deallocate nci spi device + * + * @ndev: The nci spi device to deallocate + */ +void nci_spi_free_device(struct nci_spi_dev *ndev) +{ + nci_free_device(ndev->nci_dev); +} +EXPORT_SYMBOL_GPL(nci_spi_free_device); + +/** + * nci_spi_register_device - register a nci spi device in the nfc subsystem + * + * @pdev: The nci spi device to register + */ +int nci_spi_register_device(struct nci_spi_dev *ndev) +{ + return nci_register_device(ndev->nci_dev); +} +EXPORT_SYMBOL_GPL(nci_spi_register_device); + +/** + * nci_spi_unregister_device - unregister a nci spi device in the nfc subsystem + * + * @dev: The nci spi device to unregister + */ +void nci_spi_unregister_device(struct nci_spi_dev *ndev) +{ + nci_unregister_device(ndev->nci_dev); +} +EXPORT_SYMBOL_GPL(nci_spi_unregister_device); + +static int send_acknowledge(struct nci_spi_dev *ndev, u8 acknowledge) +{ + struct sk_buff *skb; + unsigned char *hdr; + u16 crc; + int ret; + + skb = nci_skb_alloc(ndev->nci_dev, 0, GFP_KERNEL); + + /* add the NCI SPI header to the start of the buffer */ + hdr = skb_push(skb, NCI_SPI_HDR_LEN); + hdr[0] = NCI_SPI_DIRECT_WRITE; + hdr[1] = NCI_SPI_CRC_ENABLED; + hdr[2] = acknowledge << NCI_SPI_ACK_SHIFT; + hdr[3] = 0; + + crc = crc_ccitt(CRC_INIT, skb->data, skb->len); + *skb_put(skb, 1) = crc >> 8; + *skb_put(skb, 1) = crc & 0xFF; + + ret = __nci_spi_send(ndev, skb); + + kfree_skb(skb); + + return ret; +} + +static struct sk_buff *__nci_spi_recv_frame(struct nci_spi_dev *ndev) +{ + struct sk_buff *skb; + struct spi_message m; + unsigned char req[2], resp_hdr[2]; + struct spi_transfer tx, rx; + unsigned short rx_len = 0; + int ret; + + spi_message_init(&m); + req[0] = NCI_SPI_DIRECT_READ; + req[1] = ndev->acknowledge_mode; + tx.tx_buf = req; + tx.len = 2; + tx.cs_change = 0; + spi_message_add_tail(&tx, &m); + rx.rx_buf = resp_hdr; + rx.len = 2; + rx.cs_change = 1; + spi_message_add_tail(&rx, &m); + ret = spi_sync(ndev->spi, &m); + + if (ret) + return NULL; + + if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED) + rx_len = ((resp_hdr[0] & NCI_SPI_MSB_PAYLOAD_MASK) << 8) + + resp_hdr[1] + NCI_SPI_CRC_LEN; + else + rx_len = (resp_hdr[0] << 8) | resp_hdr[1]; + + skb = nci_skb_alloc(ndev->nci_dev, rx_len, GFP_KERNEL); + if (!skb) + return NULL; + + spi_message_init(&m); + rx.rx_buf = skb_put(skb, rx_len); + rx.len = rx_len; + rx.cs_change = 0; + rx.delay_usecs = ndev->xfer_udelay; + spi_message_add_tail(&rx, &m); + ret = spi_sync(ndev->spi, &m); + + if (ret) + goto receive_error; + + if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED) { + *skb_push(skb, 1) = resp_hdr[1]; + *skb_push(skb, 1) = resp_hdr[0]; + } + + return skb; + +receive_error: + kfree_skb(skb); + + return NULL; +} + +static int nci_spi_check_crc(struct sk_buff *skb) +{ + u16 crc_data = (skb->data[skb->len - 2] << 8) | + skb->data[skb->len - 1]; + int ret; + + ret = (crc_ccitt(CRC_INIT, skb->data, skb->len - NCI_SPI_CRC_LEN) + == crc_data); + + skb_trim(skb, skb->len - NCI_SPI_CRC_LEN); + + return ret; +} + +static u8 nci_spi_get_ack(struct sk_buff *skb) +{ + u8 ret; + + ret = skb->data[0] >> NCI_SPI_ACK_SHIFT; + + /* Remove NFCC part of the header: ACK, NACK and MSB payload len */ + skb_pull(skb, 2); + + return ret; +} + +/** + * nci_spi_recv_frame - receive frame from NCI SPI drivers + * + * @ndev: The nci spi device + * Context: can sleep + * + * This call may only be used from a context that may sleep. The sleep + * is non-interruptible, and has no timeout. + * + * It returns zero on success, else a negative error code. + */ +int nci_spi_recv_frame(struct nci_spi_dev *ndev) +{ + struct sk_buff *skb; + int ret = 0; + + ndev->ops->deassert_int(ndev); + + /* Retrieve frame from SPI */ + skb = __nci_spi_recv_frame(ndev); + if (!skb) { + ret = -EIO; + goto done; + } + + if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED) { + if (!nci_spi_check_crc(skb)) { + send_acknowledge(ndev, ACKNOWLEDGE_NACK); + goto done; + } + + /* In case of acknowledged mode: if ACK or NACK received, + * unblock completion of latest frame sent. + */ + ndev->req_result = nci_spi_get_ack(skb); + if (ndev->req_result) + complete(&ndev->req_completion); + } + + /* If there is no payload (ACK/NACK only frame), + * free the socket buffer + */ + if (skb->len == 0) { + kfree_skb(skb); + goto done; + } + + if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED) + send_acknowledge(ndev, ACKNOWLEDGE_ACK); + + /* Forward skb to NCI core layer */ + ret = nci_recv_frame(ndev->nci_dev, skb); + +done: + ndev->ops->assert_int(ndev); + + return ret; +} +EXPORT_SYMBOL_GPL(nci_spi_recv_frame); diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index f0c4d61f37c..f16fd59d416 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -56,6 +56,8 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 }, [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 }, [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED }, + [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING, + .len = NFC_FIRMWARE_NAME_MAXSIZE }, }; static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = { @@ -424,6 +426,69 @@ free_msg: return rc; } +int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_EVENT_SE_ADDED); + if (!hdr) + goto free_msg; + + if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || + nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || + nla_put_u8(msg, NFC_ATTR_SE_TYPE, type)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + return -EMSGSIZE; +} + +int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_EVENT_SE_REMOVED); + if (!hdr) + goto free_msg; + + if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || + nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + return -EMSGSIZE; +} + static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, u32 portid, u32 seq, struct netlink_callback *cb, @@ -442,7 +507,6 @@ static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || - nla_put_u32(msg, NFC_ATTR_SE, dev->supported_se) || nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) || nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode)) goto nla_put_failure; @@ -1025,6 +1089,108 @@ exit: return rc; } +static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info) +{ + struct nfc_dev *dev; + int rc; + u32 idx; + char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) + return -EINVAL; + + idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); + + dev = nfc_get_device(idx); + if (!dev) + return -ENODEV; + + nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME], + sizeof(firmware_name)); + + rc = nfc_fw_download(dev, firmware_name); + + nfc_put_device(dev); + return rc; +} + +int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_CMD_FW_DOWNLOAD); + if (!hdr) + goto free_msg; + + if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) || + nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + return -EMSGSIZE; +} + +static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info) +{ + struct nfc_dev *dev; + int rc; + u32 idx, se_idx; + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || + !info->attrs[NFC_ATTR_SE_INDEX]) + return -EINVAL; + + idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); + se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); + + dev = nfc_get_device(idx); + if (!dev) + return -ENODEV; + + rc = nfc_enable_se(dev, se_idx); + + nfc_put_device(dev); + return rc; +} + +static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info) +{ + struct nfc_dev *dev; + int rc; + u32 idx, se_idx; + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || + !info->attrs[NFC_ATTR_SE_INDEX]) + return -EINVAL; + + idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); + se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); + + dev = nfc_get_device(idx); + if (!dev) + return -ENODEV; + + rc = nfc_disable_se(dev, se_idx); + + nfc_put_device(dev); + return rc; +} + static struct genl_ops nfc_genl_ops[] = { { .cmd = NFC_CMD_GET_DEVICE, @@ -1084,6 +1250,21 @@ static struct genl_ops nfc_genl_ops[] = { .doit = nfc_genl_llc_sdreq, .policy = nfc_genl_policy, }, + { + .cmd = NFC_CMD_FW_DOWNLOAD, + .doit = nfc_genl_fw_download, + .policy = nfc_genl_policy, + }, + { + .cmd = NFC_CMD_ENABLE_SE, + .doit = nfc_genl_enable_se, + .policy = nfc_genl_policy, + }, + { + .cmd = NFC_CMD_DISABLE_SE, + .doit = nfc_genl_disable_se, + .policy = nfc_genl_policy, + }, }; diff --git a/net/nfc/nfc.h b/net/nfc/nfc.h index afa1f84ba04..820a7850c36 100644 --- a/net/nfc/nfc.h +++ b/net/nfc/nfc.h @@ -94,6 +94,9 @@ int nfc_genl_tm_deactivated(struct nfc_dev *dev); int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list); +int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type); +int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx); + struct nfc_dev *nfc_get_device(unsigned int idx); static inline void nfc_put_device(struct nfc_dev *dev) @@ -120,6 +123,11 @@ static inline void nfc_device_iter_exit(struct class_dev_iter *iter) class_dev_iter_exit(iter); } +int nfc_fw_download(struct nfc_dev *dev, const char *firmware_name); +int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name); + +int nfc_fw_download_done(struct nfc_dev *dev, const char *firmware_name); + int nfc_dev_up(struct nfc_dev *dev); int nfc_dev_down(struct nfc_dev *dev); @@ -139,4 +147,7 @@ int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx); int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb, data_exchange_cb_t cb, void *cb_context); +int nfc_enable_se(struct nfc_dev *dev, u32 se_idx); +int nfc_disable_se(struct nfc_dev *dev, u32 se_idx); + #endif /* __LOCAL_NFC_H */ |