2 * Marvell NFC-over-USB driver: USB interface related functions
4 * Copyright (C) 2014, Marvell International Ltd.
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available on the worldwide web at
11 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
14 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
15 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
16 * this warranty disclaimer.
19 #include <linux/module.h>
20 #include <linux/usb.h>
21 #include <linux/nfc.h>
22 #include <net/nfc/nci.h>
23 #include <net/nfc/nci_core.h>
26 static struct usb_device_id nfcmrvl_table[] = {
27 { USB_DEVICE_AND_INTERFACE_INFO(0x1286, 0x2046,
28 USB_CLASS_VENDOR_SPEC, 4, 1) },
29 { } /* Terminating entry */
32 MODULE_DEVICE_TABLE(usb, nfcmrvl_table);
34 #define NFCMRVL_USB_BULK_RUNNING 1
35 #define NFCMRVL_USB_SUSPENDING 2
37 struct nfcmrvl_usb_drv_data {
38 struct usb_device *udev;
39 struct usb_interface *intf;
41 struct work_struct waker;
42 struct usb_anchor tx_anchor;
43 struct usb_anchor bulk_anchor;
44 struct usb_anchor deferred;
46 /* protects tx_in_flight */
48 struct usb_endpoint_descriptor *bulk_tx_ep;
49 struct usb_endpoint_descriptor *bulk_rx_ep;
51 struct nfcmrvl_private *priv;
54 static int nfcmrvl_inc_tx(struct nfcmrvl_usb_drv_data *drv_data)
59 spin_lock_irqsave(&drv_data->txlock, flags);
60 rv = test_bit(NFCMRVL_USB_SUSPENDING, &drv_data->flags);
62 drv_data->tx_in_flight++;
63 spin_unlock_irqrestore(&drv_data->txlock, flags);
68 static void nfcmrvl_bulk_complete(struct urb *urb)
70 struct nfcmrvl_usb_drv_data *drv_data = urb->context;
74 dev_dbg(&drv_data->udev->dev, "urb %p status %d count %d\n",
75 urb, urb->status, urb->actual_length);
77 if (!test_bit(NFCMRVL_NCI_RUNNING, &drv_data->flags))
81 skb = nci_skb_alloc(drv_data->priv->ndev, urb->actual_length,
84 nfc_err(&drv_data->udev->dev, "failed to alloc mem\n");
86 skb_put_data(skb, urb->transfer_buffer,
88 if (nfcmrvl_nci_recv_frame(drv_data->priv, skb) < 0)
89 nfc_err(&drv_data->udev->dev,
90 "corrupted Rx packet\n");
94 if (!test_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags))
97 usb_anchor_urb(urb, &drv_data->bulk_anchor);
98 usb_mark_last_busy(drv_data->udev);
100 err = usb_submit_urb(urb, GFP_ATOMIC);
102 /* -EPERM: urb is being killed;
103 * -ENODEV: device got disconnected
105 if (err != -EPERM && err != -ENODEV)
106 nfc_err(&drv_data->udev->dev,
107 "urb %p failed to resubmit (%d)\n", urb, -err);
108 usb_unanchor_urb(urb);
113 nfcmrvl_submit_bulk_urb(struct nfcmrvl_usb_drv_data *drv_data, gfp_t mem_flags)
118 int err, size = NFCMRVL_NCI_MAX_EVENT_SIZE;
120 if (!drv_data->bulk_rx_ep)
123 urb = usb_alloc_urb(0, mem_flags);
127 buf = kmalloc(size, mem_flags);
133 pipe = usb_rcvbulkpipe(drv_data->udev,
134 drv_data->bulk_rx_ep->bEndpointAddress);
136 usb_fill_bulk_urb(urb, drv_data->udev, pipe, buf, size,
137 nfcmrvl_bulk_complete, drv_data);
139 urb->transfer_flags |= URB_FREE_BUFFER;
141 usb_mark_last_busy(drv_data->udev);
142 usb_anchor_urb(urb, &drv_data->bulk_anchor);
144 err = usb_submit_urb(urb, mem_flags);
146 if (err != -EPERM && err != -ENODEV)
147 nfc_err(&drv_data->udev->dev,
148 "urb %p submission failed (%d)\n", urb, -err);
149 usb_unanchor_urb(urb);
157 static void nfcmrvl_tx_complete(struct urb *urb)
159 struct sk_buff *skb = urb->context;
160 struct nci_dev *ndev = (struct nci_dev *)skb->dev;
161 struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
162 struct nfcmrvl_usb_drv_data *drv_data = priv->drv_data;
165 nfc_info(priv->dev, "urb %p status %d count %d\n",
166 urb, urb->status, urb->actual_length);
168 spin_lock_irqsave(&drv_data->txlock, flags);
169 drv_data->tx_in_flight--;
170 spin_unlock_irqrestore(&drv_data->txlock, flags);
172 kfree(urb->setup_packet);
176 static int nfcmrvl_usb_nci_open(struct nfcmrvl_private *priv)
178 struct nfcmrvl_usb_drv_data *drv_data = priv->drv_data;
181 err = usb_autopm_get_interface(drv_data->intf);
185 drv_data->intf->needs_remote_wakeup = 1;
187 err = nfcmrvl_submit_bulk_urb(drv_data, GFP_KERNEL);
191 set_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags);
192 nfcmrvl_submit_bulk_urb(drv_data, GFP_KERNEL);
194 usb_autopm_put_interface(drv_data->intf);
198 usb_autopm_put_interface(drv_data->intf);
202 static void nfcmrvl_usb_stop_traffic(struct nfcmrvl_usb_drv_data *drv_data)
204 usb_kill_anchored_urbs(&drv_data->bulk_anchor);
207 static int nfcmrvl_usb_nci_close(struct nfcmrvl_private *priv)
209 struct nfcmrvl_usb_drv_data *drv_data = priv->drv_data;
212 cancel_work_sync(&drv_data->waker);
214 clear_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags);
216 nfcmrvl_usb_stop_traffic(drv_data);
217 usb_kill_anchored_urbs(&drv_data->tx_anchor);
218 err = usb_autopm_get_interface(drv_data->intf);
222 drv_data->intf->needs_remote_wakeup = 0;
223 usb_autopm_put_interface(drv_data->intf);
226 usb_scuttle_anchored_urbs(&drv_data->deferred);
230 static int nfcmrvl_usb_nci_send(struct nfcmrvl_private *priv,
233 struct nfcmrvl_usb_drv_data *drv_data = priv->drv_data;
238 if (!drv_data->bulk_tx_ep)
241 urb = usb_alloc_urb(0, GFP_ATOMIC);
245 pipe = usb_sndbulkpipe(drv_data->udev,
246 drv_data->bulk_tx_ep->bEndpointAddress);
248 usb_fill_bulk_urb(urb, drv_data->udev, pipe, skb->data, skb->len,
249 nfcmrvl_tx_complete, skb);
251 err = nfcmrvl_inc_tx(drv_data);
253 usb_anchor_urb(urb, &drv_data->deferred);
254 schedule_work(&drv_data->waker);
259 usb_anchor_urb(urb, &drv_data->tx_anchor);
261 err = usb_submit_urb(urb, GFP_ATOMIC);
263 if (err != -EPERM && err != -ENODEV)
264 nfc_err(&drv_data->udev->dev,
265 "urb %p submission failed (%d)\n", urb, -err);
266 kfree(urb->setup_packet);
267 usb_unanchor_urb(urb);
269 usb_mark_last_busy(drv_data->udev);
277 static struct nfcmrvl_if_ops usb_ops = {
278 .nci_open = nfcmrvl_usb_nci_open,
279 .nci_close = nfcmrvl_usb_nci_close,
280 .nci_send = nfcmrvl_usb_nci_send,
283 static void nfcmrvl_waker(struct work_struct *work)
285 struct nfcmrvl_usb_drv_data *drv_data =
286 container_of(work, struct nfcmrvl_usb_drv_data, waker);
289 err = usb_autopm_get_interface(drv_data->intf);
293 usb_autopm_put_interface(drv_data->intf);
296 static int nfcmrvl_probe(struct usb_interface *intf,
297 const struct usb_device_id *id)
299 struct usb_endpoint_descriptor *ep_desc;
300 struct nfcmrvl_usb_drv_data *drv_data;
301 struct nfcmrvl_private *priv;
303 struct usb_device *udev = interface_to_usbdev(intf);
304 struct nfcmrvl_platform_data config;
306 /* No configuration for USB */
307 memset(&config, 0, sizeof(config));
309 nfc_info(&udev->dev, "intf %p id %p\n", intf, id);
311 drv_data = devm_kzalloc(&intf->dev, sizeof(*drv_data), GFP_KERNEL);
315 for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
316 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
318 if (!drv_data->bulk_tx_ep &&
319 usb_endpoint_is_bulk_out(ep_desc)) {
320 drv_data->bulk_tx_ep = ep_desc;
324 if (!drv_data->bulk_rx_ep &&
325 usb_endpoint_is_bulk_in(ep_desc)) {
326 drv_data->bulk_rx_ep = ep_desc;
331 if (!drv_data->bulk_tx_ep || !drv_data->bulk_rx_ep)
334 drv_data->udev = udev;
335 drv_data->intf = intf;
337 INIT_WORK(&drv_data->waker, nfcmrvl_waker);
338 spin_lock_init(&drv_data->txlock);
340 init_usb_anchor(&drv_data->tx_anchor);
341 init_usb_anchor(&drv_data->bulk_anchor);
342 init_usb_anchor(&drv_data->deferred);
344 priv = nfcmrvl_nci_register_dev(NFCMRVL_PHY_USB, drv_data, &usb_ops,
345 &intf->dev, &config);
347 return PTR_ERR(priv);
349 drv_data->priv = priv;
350 drv_data->priv->support_fw_dnld = false;
352 usb_set_intfdata(intf, drv_data);
357 static void nfcmrvl_disconnect(struct usb_interface *intf)
359 struct nfcmrvl_usb_drv_data *drv_data = usb_get_intfdata(intf);
364 nfc_info(&drv_data->udev->dev, "intf %p\n", intf);
366 nfcmrvl_nci_unregister_dev(drv_data->priv);
368 usb_set_intfdata(drv_data->intf, NULL);
372 static int nfcmrvl_suspend(struct usb_interface *intf, pm_message_t message)
374 struct nfcmrvl_usb_drv_data *drv_data = usb_get_intfdata(intf);
376 nfc_info(&drv_data->udev->dev, "intf %p\n", intf);
378 if (drv_data->suspend_count++)
381 spin_lock_irq(&drv_data->txlock);
382 if (!(PMSG_IS_AUTO(message) && drv_data->tx_in_flight)) {
383 set_bit(NFCMRVL_USB_SUSPENDING, &drv_data->flags);
384 spin_unlock_irq(&drv_data->txlock);
386 spin_unlock_irq(&drv_data->txlock);
387 drv_data->suspend_count--;
391 nfcmrvl_usb_stop_traffic(drv_data);
392 usb_kill_anchored_urbs(&drv_data->tx_anchor);
397 static void nfcmrvl_play_deferred(struct nfcmrvl_usb_drv_data *drv_data)
402 while ((urb = usb_get_from_anchor(&drv_data->deferred))) {
403 err = usb_submit_urb(urb, GFP_ATOMIC);
407 drv_data->tx_in_flight++;
409 usb_scuttle_anchored_urbs(&drv_data->deferred);
412 static int nfcmrvl_resume(struct usb_interface *intf)
414 struct nfcmrvl_usb_drv_data *drv_data = usb_get_intfdata(intf);
417 nfc_info(&drv_data->udev->dev, "intf %p\n", intf);
419 if (--drv_data->suspend_count)
422 if (!test_bit(NFCMRVL_NCI_RUNNING, &drv_data->flags))
425 if (test_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags)) {
426 err = nfcmrvl_submit_bulk_urb(drv_data, GFP_NOIO);
428 clear_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags);
432 nfcmrvl_submit_bulk_urb(drv_data, GFP_NOIO);
435 spin_lock_irq(&drv_data->txlock);
436 nfcmrvl_play_deferred(drv_data);
437 clear_bit(NFCMRVL_USB_SUSPENDING, &drv_data->flags);
438 spin_unlock_irq(&drv_data->txlock);
443 usb_scuttle_anchored_urbs(&drv_data->deferred);
445 spin_lock_irq(&drv_data->txlock);
446 clear_bit(NFCMRVL_USB_SUSPENDING, &drv_data->flags);
447 spin_unlock_irq(&drv_data->txlock);
453 static struct usb_driver nfcmrvl_usb_driver = {
455 .probe = nfcmrvl_probe,
456 .disconnect = nfcmrvl_disconnect,
458 .suspend = nfcmrvl_suspend,
459 .resume = nfcmrvl_resume,
460 .reset_resume = nfcmrvl_resume,
462 .id_table = nfcmrvl_table,
463 .supports_autosuspend = 1,
464 .disable_hub_initiated_lpm = 1,
467 module_usb_driver(nfcmrvl_usb_driver);
469 MODULE_AUTHOR("Marvell International Ltd.");
470 MODULE_DESCRIPTION("Marvell NFC-over-USB driver");
471 MODULE_LICENSE("GPL v2");