diff options
Diffstat (limited to 'drivers/nfc/nfcmrvl')
| -rw-r--r-- | drivers/nfc/nfcmrvl/Kconfig | 23 | ||||
| -rw-r--r-- | drivers/nfc/nfcmrvl/Makefile | 9 | ||||
| -rw-r--r-- | drivers/nfc/nfcmrvl/main.c | 145 | ||||
| -rw-r--r-- | drivers/nfc/nfcmrvl/nfcmrvl.h | 42 | ||||
| -rw-r--r-- | drivers/nfc/nfcmrvl/usb.c | 459 |
5 files changed, 678 insertions, 0 deletions
diff --git a/drivers/nfc/nfcmrvl/Kconfig b/drivers/nfc/nfcmrvl/Kconfig new file mode 100644 index 000000000000..5e18afd9abe2 --- /dev/null +++ b/drivers/nfc/nfcmrvl/Kconfig @@ -0,0 +1,23 @@ +config NFC_MRVL + tristate "Marvell NFC driver support" + depends on NFC_NCI + help + The core driver to support Marvell NFC devices. + + This driver is required if you want to support + Marvell NFC device 8897. + + Say Y here to compile Marvell NFC driver into the kernel or + say M to compile it as module. + +config NFC_MRVL_USB + tristate "Marvell NFC-over-USB driver" + depends on NFC_MRVL && USB + help + Marvell NFC-over-USB driver. + + This driver provides support for Marvell NFC-over-USB devices: + 8897. + + Say Y here to compile support for Marvell NFC-over-USB driver + into the kernel or say M to compile it as module. diff --git a/drivers/nfc/nfcmrvl/Makefile b/drivers/nfc/nfcmrvl/Makefile new file mode 100644 index 000000000000..97a0de72dc01 --- /dev/null +++ b/drivers/nfc/nfcmrvl/Makefile @@ -0,0 +1,9 @@ +# +# Makefile for NFCMRVL NCI based NFC driver +# + +nfcmrvl-y += main.o +obj-$(CONFIG_NFC_MRVL) += nfcmrvl.o + +nfcmrvl_usb-y += usb.o +obj-$(CONFIG_NFC_MRVL_USB) += nfcmrvl_usb.o diff --git a/drivers/nfc/nfcmrvl/main.c b/drivers/nfc/nfcmrvl/main.c new file mode 100644 index 000000000000..396fc270ffc3 --- /dev/null +++ b/drivers/nfc/nfcmrvl/main.c @@ -0,0 +1,145 @@ +/* + * Marvell NFC driver: major functions + * + * Copyright (C) 2014, Marvell International Ltd. + * + * This software file (the "File") is distributed by Marvell International + * Ltd. under the terms of the GNU General Public License Version 2, June 1991 + * (the "License"). You may use, redistribute and/or modify this File in + * accordance with the terms and conditions of the License, a copy of which + * is available on the worldwide web at + * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. + * + * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE + * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE + * ARE EXPRESSLY DISCLAIMED. The License provides additional details about + * this warranty disclaimer. + */ + +#include <linux/module.h> +#include <linux/nfc.h> +#include <net/nfc/nci.h> +#include <net/nfc/nci_core.h> +#include "nfcmrvl.h" + +#define VERSION "1.0" + +static int nfcmrvl_nci_open(struct nci_dev *ndev) +{ + struct nfcmrvl_private *priv = nci_get_drvdata(ndev); + int err; + + if (test_and_set_bit(NFCMRVL_NCI_RUNNING, &priv->flags)) + return 0; + + err = priv->if_ops->nci_open(priv); + + if (err) + clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags); + + return err; +} + +static int nfcmrvl_nci_close(struct nci_dev *ndev) +{ + struct nfcmrvl_private *priv = nci_get_drvdata(ndev); + + if (!test_and_clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags)) + return 0; + + priv->if_ops->nci_close(priv); + + return 0; +} + +static int nfcmrvl_nci_send(struct nci_dev *ndev, struct sk_buff *skb) +{ + struct nfcmrvl_private *priv = nci_get_drvdata(ndev); + + nfc_info(priv->dev, "send entry, len %d\n", skb->len); + + skb->dev = (void *)ndev; + + if (!test_bit(NFCMRVL_NCI_RUNNING, &priv->flags)) + return -EBUSY; + + return priv->if_ops->nci_send(priv, skb); +} + +static struct nci_ops nfcmrvl_nci_ops = { + .open = nfcmrvl_nci_open, + .close = nfcmrvl_nci_close, + .send = nfcmrvl_nci_send, +}; + +struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data, + struct nfcmrvl_if_ops *ops, + struct device *dev) +{ + struct nfcmrvl_private *priv; + int rc; + u32 protocols; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return ERR_PTR(-ENOMEM); + + priv->drv_data = drv_data; + priv->if_ops = ops; + priv->dev = dev; + + protocols = NFC_PROTO_JEWEL_MASK + | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK + | NFC_PROTO_ISO14443_MASK + | NFC_PROTO_ISO14443_B_MASK + | NFC_PROTO_NFC_DEP_MASK; + + priv->ndev = nci_allocate_device(&nfcmrvl_nci_ops, protocols, 0, 0); + if (!priv->ndev) { + nfc_err(dev, "nci_allocate_device failed"); + return ERR_PTR(-ENOMEM); + } + + nci_set_drvdata(priv->ndev, priv); + + rc = nci_register_device(priv->ndev); + if (rc) { + nfc_err(dev, "nci_register_device failed %d", rc); + nci_free_device(priv->ndev); + return ERR_PTR(rc); + } + + nfc_info(dev, "registered with nci successfully\n"); + return priv; +} +EXPORT_SYMBOL_GPL(nfcmrvl_nci_register_dev); + +void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv) +{ + struct nci_dev *ndev = priv->ndev; + + nci_unregister_device(ndev); + nci_free_device(ndev); + kfree(priv); +} +EXPORT_SYMBOL_GPL(nfcmrvl_nci_unregister_dev); + +int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, void *data, int count) +{ + struct sk_buff *skb; + + skb = nci_skb_alloc(priv->ndev, count, GFP_ATOMIC); + if (!skb) + return -ENOMEM; + + memcpy(skb_put(skb, count), data, count); + nci_recv_frame(priv->ndev, skb); + + return count; +} +EXPORT_SYMBOL_GPL(nfcmrvl_nci_recv_frame); + +MODULE_AUTHOR("Marvell International Ltd."); +MODULE_DESCRIPTION("Marvell NFC driver ver " VERSION); +MODULE_VERSION(VERSION); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/nfc/nfcmrvl/nfcmrvl.h b/drivers/nfc/nfcmrvl/nfcmrvl.h new file mode 100644 index 000000000000..a007175f77fe --- /dev/null +++ b/drivers/nfc/nfcmrvl/nfcmrvl.h @@ -0,0 +1,42 @@ +/** + * Marvell NFC driver + * + * Copyright (C) 2014, Marvell International Ltd. + * + * This software file (the "File") is distributed by Marvell International + * Ltd. under the terms of the GNU General Public License Version 2, June 1991 + * (the "License"). You may use, redistribute and/or modify this File in + * accordance with the terms and conditions of the License, a copy of which + * is available on the worldwide web at + * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. + * + * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE + * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE + * ARE EXPRESSLY DISCLAIMED. The License provides additional details about + * this warranty disclaimer. + **/ + +/* Define private flags: */ +#define NFCMRVL_NCI_RUNNING 1 + +#define NFCMRVL_NCI_MAX_EVENT_SIZE 260 + +struct nfcmrvl_private { + struct nci_dev *ndev; + unsigned long flags; + void *drv_data; + struct device *dev; + struct nfcmrvl_if_ops *if_ops; +}; + +struct nfcmrvl_if_ops { + int (*nci_open) (struct nfcmrvl_private *priv); + int (*nci_close) (struct nfcmrvl_private *priv); + int (*nci_send) (struct nfcmrvl_private *priv, struct sk_buff *skb); +}; + +void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv); +int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, void *data, int count); +struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data, + struct nfcmrvl_if_ops *ops, + struct device *dev); diff --git a/drivers/nfc/nfcmrvl/usb.c b/drivers/nfc/nfcmrvl/usb.c new file mode 100644 index 000000000000..3221ca37d6c9 --- /dev/null +++ b/drivers/nfc/nfcmrvl/usb.c @@ -0,0 +1,459 @@ +/** + * Marvell NFC-over-USB driver: USB interface related functions + * + * Copyright (C) 2014, Marvell International Ltd. + * + * This software file (the "File") is distributed by Marvell International + * Ltd. under the terms of the GNU General Public License Version 2, June 1991 + * (the "License"). You may use, redistribute and/or modify this File in + * accordance with the terms and conditions of the License, a copy of which + * is available on the worldwide web at + * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. + * + * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE + * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE + * ARE EXPRESSLY DISCLAIMED. The License provides additional details about + * this warranty disclaimer. + **/ + +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/nfc.h> +#include <net/nfc/nci.h> +#include <net/nfc/nci_core.h> +#include "nfcmrvl.h" + +#define VERSION "1.0" + +static struct usb_device_id nfcmrvl_table[] = { + { USB_DEVICE_INTERFACE_CLASS(0x1286, 0x2046, 0xff) }, + { } /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE(usb, nfcmrvl_table); + +#define NFCMRVL_USB_BULK_RUNNING 1 +#define NFCMRVL_USB_SUSPENDING 2 + +struct nfcmrvl_usb_drv_data { + struct usb_device *udev; + struct usb_interface *intf; + unsigned long flags; + struct work_struct waker; + struct usb_anchor tx_anchor; + struct usb_anchor bulk_anchor; + struct usb_anchor deferred; + int tx_in_flight; + /* protects tx_in_flight */ + spinlock_t txlock; + struct usb_endpoint_descriptor *bulk_tx_ep; + struct usb_endpoint_descriptor *bulk_rx_ep; + int suspend_count; + struct nfcmrvl_private *priv; +}; + +static int nfcmrvl_inc_tx(struct nfcmrvl_usb_drv_data *drv_data) +{ + unsigned long flags; + int rv; + + spin_lock_irqsave(&drv_data->txlock, flags); + rv = test_bit(NFCMRVL_USB_SUSPENDING, &drv_data->flags); + if (!rv) + drv_data->tx_in_flight++; + spin_unlock_irqrestore(&drv_data->txlock, flags); + + return rv; +} + +static void nfcmrvl_bulk_complete(struct urb *urb) +{ + struct nfcmrvl_usb_drv_data *drv_data = urb->context; + int err; + + dev_dbg(&drv_data->udev->dev, "urb %p status %d count %d", + urb, urb->status, urb->actual_length); + + if (!test_bit(NFCMRVL_NCI_RUNNING, &drv_data->flags)) + return; + + if (!urb->status) { + if (nfcmrvl_nci_recv_frame(drv_data->priv, urb->transfer_buffer, + urb->actual_length) < 0) + nfc_err(&drv_data->udev->dev, "corrupted Rx packet"); + } + + if (!test_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags)) + return; + + usb_anchor_urb(urb, &drv_data->bulk_anchor); + usb_mark_last_busy(drv_data->udev); + + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err) { + /* -EPERM: urb is being killed; + * -ENODEV: device got disconnected + */ + if (err != -EPERM && err != -ENODEV) + nfc_err(&drv_data->udev->dev, + "urb %p failed to resubmit (%d)", urb, -err); + usb_unanchor_urb(urb); + } +} + +static int +nfcmrvl_submit_bulk_urb(struct nfcmrvl_usb_drv_data *drv_data, gfp_t mem_flags) +{ + struct urb *urb; + unsigned char *buf; + unsigned int pipe; + int err, size = NFCMRVL_NCI_MAX_EVENT_SIZE; + + if (!drv_data->bulk_rx_ep) + return -ENODEV; + + urb = usb_alloc_urb(0, mem_flags); + if (!urb) + return -ENOMEM; + + buf = kmalloc(size, mem_flags); + if (!buf) { + usb_free_urb(urb); + return -ENOMEM; + } + + pipe = usb_rcvbulkpipe(drv_data->udev, + drv_data->bulk_rx_ep->bEndpointAddress); + + usb_fill_bulk_urb(urb, drv_data->udev, pipe, buf, size, + nfcmrvl_bulk_complete, drv_data); + + urb->transfer_flags |= URB_FREE_BUFFER; + + usb_mark_last_busy(drv_data->udev); + usb_anchor_urb(urb, &drv_data->bulk_anchor); + + err = usb_submit_urb(urb, mem_flags); + if (err) { + if (err != -EPERM && err != -ENODEV) + nfc_err(&drv_data->udev->dev, + "urb %p submission failed (%d)", urb, -err); + usb_unanchor_urb(urb); + } + + usb_free_urb(urb); + + return err; +} + +static void nfcmrvl_tx_complete(struct urb *urb) +{ + struct sk_buff *skb = urb->context; + struct nci_dev *ndev = (struct nci_dev *)skb->dev; + struct nfcmrvl_private *priv = nci_get_drvdata(ndev); + struct nfcmrvl_usb_drv_data *drv_data = priv->drv_data; + + nfc_info(priv->dev, "urb %p status %d count %d", + urb, urb->status, urb->actual_length); + + spin_lock(&drv_data->txlock); + drv_data->tx_in_flight--; + spin_unlock(&drv_data->txlock); + + kfree(urb->setup_packet); + kfree_skb(skb); +} + +static int nfcmrvl_usb_nci_open(struct nfcmrvl_private *priv) +{ + struct nfcmrvl_usb_drv_data *drv_data = priv->drv_data; + int err; + + err = usb_autopm_get_interface(drv_data->intf); + if (err) + return err; + + drv_data->intf->needs_remote_wakeup = 1; + + err = nfcmrvl_submit_bulk_urb(drv_data, GFP_KERNEL); + if (err) + goto failed; + + set_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags); + nfcmrvl_submit_bulk_urb(drv_data, GFP_KERNEL); + + usb_autopm_put_interface(drv_data->intf); + return 0; + +failed: + usb_autopm_put_interface(drv_data->intf); + return err; +} + +static void nfcmrvl_usb_stop_traffic(struct nfcmrvl_usb_drv_data *drv_data) +{ + usb_kill_anchored_urbs(&drv_data->bulk_anchor); +} + +static int nfcmrvl_usb_nci_close(struct nfcmrvl_private *priv) +{ + struct nfcmrvl_usb_drv_data *drv_data = priv->drv_data; + int err; + + cancel_work_sync(&drv_data->waker); + + clear_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags); + + nfcmrvl_usb_stop_traffic(drv_data); + usb_kill_anchored_urbs(&drv_data->tx_anchor); + err = usb_autopm_get_interface(drv_data->intf); + if (err) + goto failed; + + drv_data->intf->needs_remote_wakeup = 0; + usb_autopm_put_interface(drv_data->intf); + +failed: + usb_scuttle_anchored_urbs(&drv_data->deferred); + return 0; +} + +static int nfcmrvl_usb_nci_send(struct nfcmrvl_private *priv, + struct sk_buff *skb) +{ + struct nfcmrvl_usb_drv_data *drv_data = priv->drv_data; + struct urb *urb; + unsigned int pipe; + int err; + + if (!drv_data->bulk_tx_ep) + return -ENODEV; + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) + return -ENOMEM; + + pipe = usb_sndbulkpipe(drv_data->udev, + drv_data->bulk_tx_ep->bEndpointAddress); + + usb_fill_bulk_urb(urb, drv_data->udev, pipe, skb->data, skb->len, + nfcmrvl_tx_complete, skb); + + err = nfcmrvl_inc_tx(drv_data); + if (err) { + usb_anchor_urb(urb, &drv_data->deferred); + schedule_work(&drv_data->waker); + err = 0; + goto done; + } + + usb_anchor_urb(urb, &drv_data->tx_anchor); + + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err) { + if (err != -EPERM && err != -ENODEV) + nfc_err(&drv_data->udev->dev, + "urb %p submission failed (%d)", urb, -err); + kfree(urb->setup_packet); + usb_unanchor_urb(urb); + } else { + usb_mark_last_busy(drv_data->udev); + } + +done: + usb_free_urb(urb); + return err; +} + +static struct nfcmrvl_if_ops usb_ops = { + .nci_open = nfcmrvl_usb_nci_open, + .nci_close = nfcmrvl_usb_nci_close, + .nci_send = nfcmrvl_usb_nci_send, +}; + +static void nfcmrvl_waker(struct work_struct *work) +{ + struct nfcmrvl_usb_drv_data *drv_data = + container_of(work, struct nfcmrvl_usb_drv_data, waker); + int err; + + err = usb_autopm_get_interface(drv_data->intf); + if (err) + return; + + usb_autopm_put_interface(drv_data->intf); +} + +static int nfcmrvl_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usb_endpoint_descriptor *ep_desc; + struct nfcmrvl_usb_drv_data *drv_data; + struct nfcmrvl_private *priv; + int i; + struct usb_device *udev = interface_to_usbdev(intf); + + nfc_info(&udev->dev, "intf %p id %p", intf, id); + + drv_data = devm_kzalloc(&intf->dev, sizeof(*drv_data), GFP_KERNEL); + if (!drv_data) + return -ENOMEM; + + for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) { + ep_desc = &intf->cur_altsetting->endpoint[i].desc; + + if (!drv_data->bulk_tx_ep && + usb_endpoint_is_bulk_out(ep_desc)) { + drv_data->bulk_tx_ep = ep_desc; + continue; + } + + if (!drv_data->bulk_rx_ep && + usb_endpoint_is_bulk_in(ep_desc)) { + drv_data->bulk_rx_ep = ep_desc; + continue; + } + } + + if (!drv_data->bulk_tx_ep || !drv_data->bulk_rx_ep) + return -ENODEV; + + drv_data->udev = udev; + drv_data->intf = intf; + + INIT_WORK(&drv_data->waker, nfcmrvl_waker); + spin_lock_init(&drv_data->txlock); + + init_usb_anchor(&drv_data->tx_anchor); + init_usb_anchor(&drv_data->bulk_anchor); + init_usb_anchor(&drv_data->deferred); + + priv = nfcmrvl_nci_register_dev(drv_data, &usb_ops, + &drv_data->udev->dev); + if (IS_ERR(priv)) + return PTR_ERR(priv); + + drv_data->priv = priv; + priv->dev = &drv_data->udev->dev; + + usb_set_intfdata(intf, drv_data); + + return 0; +} + +static void nfcmrvl_disconnect(struct usb_interface *intf) +{ + struct nfcmrvl_usb_drv_data *drv_data = usb_get_intfdata(intf); + + if (!drv_data) + return; + + nfc_info(&drv_data->udev->dev, "intf %p", intf); + + nfcmrvl_nci_unregister_dev(drv_data->priv); + + usb_set_intfdata(drv_data->intf, NULL); +} + +#ifdef CONFIG_PM +static int nfcmrvl_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct nfcmrvl_usb_drv_data *drv_data = usb_get_intfdata(intf); + + nfc_info(&drv_data->udev->dev, "intf %p", intf); + + if (drv_data->suspend_count++) + return 0; + + spin_lock_irq(&drv_data->txlock); + if (!(PMSG_IS_AUTO(message) && drv_data->tx_in_flight)) { + set_bit(NFCMRVL_USB_SUSPENDING, &drv_data->flags); + spin_unlock_irq(&drv_data->txlock); + } else { + spin_unlock_irq(&drv_data->txlock); + drv_data->suspend_count--; + return -EBUSY; + } + + nfcmrvl_usb_stop_traffic(drv_data); + usb_kill_anchored_urbs(&drv_data->tx_anchor); + + return 0; +} + +static void nfcmrvl_play_deferred(struct nfcmrvl_usb_drv_data *drv_data) +{ + struct urb *urb; + int err; + + while ((urb = usb_get_from_anchor(&drv_data->deferred))) { + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err) + break; + + drv_data->tx_in_flight++; + } + usb_scuttle_anchored_urbs(&drv_data->deferred); +} + +static int nfcmrvl_resume(struct usb_interface *intf) +{ + struct nfcmrvl_usb_drv_data *drv_data = usb_get_intfdata(intf); + int err = 0; + + nfc_info(&drv_data->udev->dev, "intf %p", intf); + + if (--drv_data->suspend_count) + return 0; + + if (!test_bit(NFCMRVL_NCI_RUNNING, &drv_data->flags)) + goto done; + + if (test_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags)) { + err = nfcmrvl_submit_bulk_urb(drv_data, GFP_NOIO); + if (err) { + clear_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags); + goto failed; + } + + nfcmrvl_submit_bulk_urb(drv_data, GFP_NOIO); + } + + spin_lock_irq(&drv_data->txlock); + nfcmrvl_play_deferred(drv_data); + clear_bit(NFCMRVL_USB_SUSPENDING, &drv_data->flags); + spin_unlock_irq(&drv_data->txlock); + + return 0; + +failed: + usb_scuttle_anchored_urbs(&drv_data->deferred); +done: + spin_lock_irq(&drv_data->txlock); + clear_bit(NFCMRVL_USB_SUSPENDING, &drv_data->flags); + spin_unlock_irq(&drv_data->txlock); + + return err; +} +#endif + +static struct usb_driver nfcmrvl_usb_driver = { + .name = "nfcmrvl", + .probe = nfcmrvl_probe, + .disconnect = nfcmrvl_disconnect, +#ifdef CONFIG_PM + .suspend = nfcmrvl_suspend, + .resume = nfcmrvl_resume, + .reset_resume = nfcmrvl_resume, +#endif + .id_table = nfcmrvl_table, + .supports_autosuspend = 1, + .disable_hub_initiated_lpm = 1, + .soft_unbind = 1, +}; +module_usb_driver(nfcmrvl_usb_driver); + +MODULE_AUTHOR("Marvell International Ltd."); +MODULE_DESCRIPTION("Marvell NFC-over-USB driver ver " VERSION); +MODULE_VERSION(VERSION); +MODULE_LICENSE("GPL v2"); |
