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Commit e9593670 authored by Nakul Kadannavar's avatar Nakul Kadannavar
Browse files

NFC: Read NFCC is fused or unfused 



Implement kernel ioctl to read if NFCC is fused or not.

CRs-Fixed: 692604
Change-Id: I588c3bcf0fc52e8b857fdeaa1f9f2a343efec744
Signed-off-by: default avatarNakul Kadannavar <nakulk@codeaurora.org>
parent e03ec8b2

drivers/nfc/nfc-nci.c

+65 −1
Original line number Diff line number Diff line
@@ -66,7 +66,7 @@ MODULE_DEVICE_TABLE(of, msm_match_table); 
#define CORE_RST_NTF_LENGTH		(0x02)

#define WAKE_TIMEOUT			(10)

#define WAKE_REG			(0x10)



#define EFUSE_REG			(0xA0)



struct qca199x_dev {

	wait_queue_head_t read_wq;
@@ -707,6 +707,61 @@ int nfc_ioctl_nfcc_mode(struct file *filp, unsigned int cmd, unsigned long arg) 
	return retval;

}



/*

 * Inside nfc_ioctl_nfcc_efuse

 *

 * @brief   nfc_ioctl_nfcc_efuse

 *

 *

 */

int nfc_ioctl_nfcc_efuse(struct file *filp, unsigned int cmd,

				unsigned long arg)

{

	int r = 0;

	unsigned short slave_addr = 0xE;

	unsigned short curr_addr;

	unsigned char efuse_addr  = EFUSE_REG;

	unsigned char efuse_value = 0xFF;



	struct qca199x_dev *qca199x_dev = filp->private_data;



	curr_addr = qca199x_dev->client->addr;

	qca199x_dev->client->addr = slave_addr;



	r = nfc_i2c_write(qca199x_dev->client,

				&efuse_addr, 1);

	if (r < 0) {

		/* Restore original NFCC slave I2C address */

		qca199x_dev->client->addr = curr_addr;

		dev_err(&qca199x_dev->client->dev,

		"ERROR_WRITE_FAIL : i2c write fail\n");

		return -EIO;

	}



	/*

	 * NFCC chip needs to be at least

	 * 10usec high before make it low

	 */

	usleep_range(10, 15);



	r = i2c_master_recv(qca199x_dev->client, &efuse_value,

					sizeof(efuse_value));

	if (r < 0) {

		/* Restore original NFCC slave I2C address */

		qca199x_dev->client->addr = curr_addr;

		dev_err(&qca199x_dev->client->dev,

		"ERROR_I2C_RCV_FAIL : i2c recv fail\n");

		return -EIO;

	}



	dev_dbg(&qca199x_dev->client->dev, "%s : EFUSE_VALUE %02x\n",

	__func__, efuse_value);



	/* Restore original NFCC slave I2C address */

	qca199x_dev->client->addr = curr_addr;

	return efuse_value;

}



/*

 * Inside nfc_ioctl_nfcc_version

 *
@@ -891,6 +946,7 @@ static long nfc_ioctl(struct file *pfile, unsigned int cmd, 
			unsigned long arg)

{

	int r = 0;

	struct qca199x_dev *qca199x_dev = pfile->private_data;

	switch (cmd) {

	case NFC_SET_PWR:

		nfc_ioctl_power_states(pfile, cmd, arg);
@@ -908,6 +964,14 @@ static long nfc_ioctl(struct file *pfile, unsigned int cmd, 
		break;

	case SET_EMULATOR_TEST_POINT:

		break;

	case NFC_GET_EFUSE:

		r = nfc_ioctl_nfcc_efuse(pfile, cmd, arg);

		if (r < 0) {

			r = 0xFF;

			dev_err(&qca199x_dev->client->dev,

			"nfc_ioctl : FAILED TO READ EFUSE TYPE\n");

		}

		break;

	default:

		r = -ENOIOCTLCMD;

	}

drivers/nfc/nfc-nci.h

+1 −0
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ struct devicemode { 
#define SET_RX_BLOCK	_IOW(0xE9, 0x04, unsigned int)

#define SET_EMULATOR_TEST_POINT		_IOW(0xE9, 0x05, unsigned int)

#define NFCC_VERSION				_IOW(0xE9, 0x08, unsigned int)

#define NFC_GET_EFUSE				_IOW(0xE9, 0x09, unsigned int)



#define NFC_MAX_I2C_TRANSFER	(0x0400)

#define NFC_MSG_MAX_SIZE	(0x21)