diff options
| -rw-r--r-- | drivers/nfc/pn533.c | 77 |
1 files changed, 70 insertions, 7 deletions
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c index cd20641e7443..2daf04c07338 100644 --- a/drivers/nfc/pn533.c +++ b/drivers/nfc/pn533.c @@ -150,6 +150,7 @@ MODULE_DEVICE_TABLE(usb, pn533_table); #define PN533_CMD_TG_INIT_AS_TARGET 0x8c #define PN533_CMD_TG_GET_DATA 0x86 #define PN533_CMD_TG_SET_DATA 0x8e +#define PN533_CMD_TG_SET_META_DATA 0x94 #define PN533_CMD_UNDEF 0xff #define PN533_CMD_RESPONSE(cmd) (cmd + 1) @@ -374,6 +375,7 @@ struct pn533 { struct work_struct mi_rx_work; struct work_struct mi_tx_work; struct work_struct mi_tm_rx_work; + struct work_struct mi_tm_tx_work; struct work_struct tg_work; struct work_struct rf_work; @@ -1702,6 +1704,46 @@ static void pn533_wq_tm_mi_recv(struct work_struct *work) return; } +static int pn533_tm_send_complete(struct pn533 *dev, void *arg, + struct sk_buff *resp); +static void pn533_wq_tm_mi_send(struct work_struct *work) +{ + struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work); + struct sk_buff *skb; + int rc; + + dev_dbg(&dev->interface->dev, "%s\n", __func__); + + /* Grab the first skb in the queue */ + skb = skb_dequeue(&dev->fragment_skb); + if (skb == NULL) { /* No more data */ + /* Reset the queue for future use */ + skb_queue_head_init(&dev->fragment_skb); + goto error; + } + + /* last entry - remove MI bit */ + if (skb_queue_len(&dev->fragment_skb) == 0) { + rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA, + skb, pn533_tm_send_complete, NULL); + } else + rc = pn533_send_cmd_direct_async(dev, + PN533_CMD_TG_SET_META_DATA, + skb, pn533_tm_send_complete, NULL); + + if (rc == 0) /* success */ + return; + + dev_err(&dev->interface->dev, + "Error %d when trying to perform set meta data_exchange", rc); + + dev_kfree_skb(skb); + +error: + pn533_send_ack(dev, GFP_KERNEL); + queue_work(dev->wq, &dev->cmd_work); +} + static void pn533_wq_tg_get_data(struct work_struct *work) { struct pn533 *dev = container_of(work, struct pn533, tg_work); @@ -2668,6 +2710,11 @@ static int pn533_tm_send_complete(struct pn533 *dev, void *arg, status = resp->data[0]; + /* Prepare for the next round */ + if (skb_queue_len(&dev->fragment_skb) > 0) { + queue_work(dev->wq, &dev->mi_tm_tx_work); + return -EINPROGRESS; + } dev_kfree_skb(resp); if (status != 0) { @@ -2690,17 +2737,32 @@ static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) dev_dbg(&dev->interface->dev, "%s\n", __func__); + /* let's split in multiple chunks if size's too big */ if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { - nfc_err(&dev->interface->dev, - "Data length greater than the max allowed: %d\n", - PN533_CMD_DATAEXCH_DATA_MAXLEN); - return -ENOSYS; + rc = pn533_fill_fragment_skbs(dev, skb); + if (rc <= 0) + goto error; + + /* get the first skb */ + skb = skb_dequeue(&dev->fragment_skb); + if (!skb) { + rc = -EIO; + goto error; + } + + rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb, + pn533_tm_send_complete, NULL); + } else { + /* Send th skb */ + rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb, + pn533_tm_send_complete, NULL); } - rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb, - pn533_tm_send_complete, NULL); - if (rc < 0) +error: + if (rc < 0) { dev_kfree_skb(skb); + skb_queue_purge(&dev->fragment_skb); + } return rc; } @@ -3111,6 +3173,7 @@ static int pn533_probe(struct usb_interface *interface, INIT_WORK(&dev->mi_tx_work, pn533_wq_mi_send); INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data); INIT_WORK(&dev->mi_tm_rx_work, pn533_wq_tm_mi_recv); + INIT_WORK(&dev->mi_tm_tx_work, pn533_wq_tm_mi_send); INIT_DELAYED_WORK(&dev->poll_work, pn533_wq_poll); INIT_WORK(&dev->rf_work, pn533_wq_rf); dev->wq = alloc_ordered_workqueue("pn533", 0); |