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Commit 5eef4845 authored by Samuel Ortiz's avatar Samuel Ortiz
Browse files

NFC: pn533: Unconditionaly select the highest p2p bit rate 



p2p devices must be able to support 424 kbps, so we should always select
that bitrate in initiator mode.

Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent a94e10f7

drivers/nfc/pn533.c

+20 −36
Original line number Diff line number Diff line
@@ -2086,20 +2086,6 @@ static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg, 
	return rc;

}



static int pn533_mod_to_baud(struct pn533 *dev)

{

	switch (dev->poll_mod_curr) {

	case PN533_POLL_MOD_106KBPS_A:

		return 0;

	case PN533_POLL_MOD_212KBPS_FELICA:

		return 1;

	case PN533_POLL_MOD_424KBPS_FELICA:

		return 2;

	default:

		return -EINVAL;

	}

}



static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);

#define PASSIVE_DATA_LEN 5

static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
@@ -2107,8 +2093,8 @@ static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, 
{

	struct pn533 *dev = nfc_get_drvdata(nfc_dev);

	struct sk_buff *skb;

	int rc, baud, skb_len;

	u8 *next, *arg;

	int rc, skb_len;

	u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];



	u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
@@ -2126,41 +2112,39 @@ static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, 
		return -EBUSY;

	}



	baud = pn533_mod_to_baud(dev);

	if (baud < 0) {

		nfc_dev_err(&dev->interface->dev,

			    "Invalid curr modulation %d", dev->poll_mod_curr);

		return baud;

	}



	skb_len = 3 + gb_len; /* ActPass + BR + Next */

	if (comm_mode == NFC_COMM_PASSIVE)

	skb_len += PASSIVE_DATA_LEN;



	if (target && target->nfcid2_len)

	/* NFCID3 */

	skb_len += NFC_NFCID3_MAXSIZE;

	if (target && !target->nfcid2_len) {

		nfcid3[0] = 0x1;

		nfcid3[1] = 0xfe;

		get_random_bytes(nfcid3 + 2, 6);

	}



	skb = pn533_alloc_skb(dev, skb_len);

	if (!skb)

		return -ENOMEM;



	*skb_put(skb, 1) = !comm_mode;  /* ActPass */

	*skb_put(skb, 1) = baud;  /* Baud rate */

	*skb_put(skb, 1) = 0x02;  /* 424 kbps */



	next = skb_put(skb, 1);  /* Next */

	*next = 0;



	if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {

		memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,

		       PASSIVE_DATA_LEN);

	/* Copy passive data */

	memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);

	*next |= 1;

	}



	if (target && target->nfcid2_len) {

	/* Copy NFCID3 (which is NFCID2 from SENSF_RES) */

	if (target && target->nfcid2_len)

		memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,

		       target->nfcid2_len);

	else

		memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,

		       NFC_NFCID3_MAXSIZE);

	*next |= 2;

	}



	if (gb != NULL && gb_len > 0) {

		memcpy(skb_put(skb, gb_len), gb, gb_len);