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Commit 3bac5e16 authored by Rohit Rangwani's avatar Rohit Rangwani Committed by Gaurav Singhal
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NFC: Detection of NQ chip set and firmware version 



Changes made to detect NQ chipset and firmware
version

Change-Id: Ia9caa30b88eccb99dfebe9179bb61b8c2abb5de4
Signed-off-by: default avatarRohit Rangwani <rrangwan@codeaurora.org>
parent 9a140cb5

drivers/nfc/nq-nci.c

+93 −10
Original line number Diff line number Diff line
@@ -53,6 +53,7 @@ struct nqx_dev { 
	struct	mutex		read_mutex;

	struct	i2c_client	*client;

	struct	miscdevice	nqx_device;

	union  nqx_uinfo	nqx_info;

	/* NFC GPIO variables */

	unsigned int		irq_gpio;

	unsigned int		en_gpio;
@@ -464,6 +465,25 @@ int nfc_ioctl_core_reset_ntf(struct file *filp) 
	return nqx_dev->core_reset_ntf;

}



/**

 * Inside nfc_ioctl_nfcc_info

 *

 * @brief   nfc_ioctl_nfcc_info

 *

 * Check the NQ Chipset and firmware version details

 */

unsigned int nfc_ioctl_nfcc_info(struct file *filp, unsigned long arg)

{

	unsigned int r = 0;

	struct nqx_dev *nqx_dev = filp->private_data;



	r = nqx_dev->nqx_info.i;

	dev_dbg(&nqx_dev->client->dev,

		"nqx nfc : nfc_ioctl_nfcc_info r = %d\n", r);



	return r;

}



static long nfc_ioctl(struct file *pfile, unsigned int cmd,

			unsigned long arg)

{
@@ -486,6 +506,9 @@ static long nfc_ioctl(struct file *pfile, unsigned int cmd, 
	case NFCC_INITIAL_CORE_RESET_NTF:

		r = nfc_ioctl_core_reset_ntf(pfile);

		break;

	case NFCC_GET_INFO:

		r = nfc_ioctl_nfcc_info(pfile, arg);

		break;

	default:

		r = -ENOIOCTLCMD;

	}
@@ -505,13 +528,16 @@ static const struct file_operations nfc_dev_fops = { 
};



/* Check for availability of NQ_ NFC controller hardware */

static int nfcc_hw_check(struct i2c_client *client, unsigned int enable_gpio)

static int nfcc_hw_check(struct i2c_client *client, struct nqx_dev *nqx_dev)

{

	int ret = 0;



	unsigned char raw_nci_reset_cmd[] =  {0x20, 0x00, 0x01, 0x00};

	unsigned char raw_nci_init_cmd[] =   {0x20, 0x01, 0x00};

	unsigned char nci_init_rsp[28];

	unsigned char nci_reset_rsp[6];



	unsigned char init_rsp_len = 0;

	unsigned int enable_gpio = nqx_dev->en_gpio;

	/* making sure that the NFCC starts in a clean state. */

	gpio_set_value(enable_gpio, 0);/* ULPM: Disable */

	/* hardware dependent delay */
@@ -543,6 +569,65 @@ static int nfcc_hw_check(struct i2c_client *client, unsigned int enable_gpio) 
		"%s: - i2c_master_recv Error\n", __func__);

		goto err_nfcc_hw_check;

	}

	ret = i2c_master_send(client, raw_nci_init_cmd,

		sizeof(raw_nci_init_cmd));

	if (ret < 0) {

		dev_err(&client->dev,

		"%s: - i2c_master_send Error\n", __func__);

		goto err_nfcc_hw_check;

	}

	/* hardware dependent delay */

	msleep(30);

	/* Read Response of INIT command */

	ret = i2c_master_recv(client, nci_init_rsp,

		sizeof(nci_init_rsp));

	if (ret < 0) {

		dev_err(&client->dev,

		"%s: - i2c_master_recv Error\n", __func__);

		goto err_nfcc_hw_check;

	}

	init_rsp_len = 2 + nci_init_rsp[2]; /*payload + len*/

	if (init_rsp_len > PAYLOAD_HEADER_LENGTH) {

		nqx_dev->nqx_info.info.chip_type =

				nci_init_rsp[init_rsp_len - 3];

		nqx_dev->nqx_info.info.rom_version =

				nci_init_rsp[init_rsp_len - 2];

		nqx_dev->nqx_info.info.fw_major =

				nci_init_rsp[init_rsp_len - 1];

		nqx_dev->nqx_info.info.fw_minor =

				nci_init_rsp[init_rsp_len];

	}

	dev_dbg(&nqx_dev->client->dev, "NQ NFCC chip_type = %x\n",

		nqx_dev->nqx_info.info.chip_type);

	dev_dbg(&nqx_dev->client->dev, "NQ fw version = %x.%x.%x\n",

		nqx_dev->nqx_info.info.rom_version,

		nqx_dev->nqx_info.info.fw_major,

		nqx_dev->nqx_info.info.fw_minor);



	switch (nqx_dev->nqx_info.info.chip_type) {

	case NFCC_NQ_210:

		dev_dbg(&client->dev,

		"%s: ## NFCC == NQ210 ##\n", __func__);

		break;

	case NFCC_NQ_220:

		dev_dbg(&client->dev,

		"%s: ## NFCC == NQ220 ##\n", __func__);

		break;

	case NFCC_NQ_310:

		dev_dbg(&client->dev,

		"%s: ## NFCC == NQ310 ##\n", __func__);

		break;

	case NFCC_NQ_330:

		dev_dbg(&client->dev,

		"%s: ## NFCC == NQ330 ##\n", __func__);

		break;

	default:

		dev_err(&client->dev,

		"%s: - NFCC HW not Supported\n", __func__);

		break;

	}



	/*Disable NFC by default to save power on boot*/

	gpio_set_value(enable_gpio, 0);/* ULPM: Disable */

	ret = 0;

	goto done;
@@ -563,9 +648,7 @@ done: 
static int nqx_clock_select(struct nqx_dev *nqx_dev)

{

	int r = 0;



	nqx_dev->s_clk =

			clk_get(&nqx_dev->client->dev, "ref_clk");

	nqx_dev->s_clk = clk_get(&nqx_dev->client->dev, "ref_clk");



	if (nqx_dev->s_clk == NULL)

		goto err_clk;
@@ -863,7 +946,7 @@ static int nqx_probe(struct i2c_client *client, 
	 * present before attempting further hardware initialisation.

	 *

	 */

	r = nfcc_hw_check(client , platform_data->en_gpio);

	r = nfcc_hw_check(client , nqx_dev);

	if (r) {

		/* make sure NFCC is not enabled */

		gpio_set_value(platform_data->en_gpio, 0);

drivers/nfc/nq-nci.h

+8 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 


#include <linux/ioctl.h>

#include <linux/miscdevice.h>

#include <linux/nfcinfo.h>



#define NFC_SET_PWR			_IOW(0xE9, 0x01, unsigned int)

#define ESE_SET_PWR			_IOW(0xE9, 0x02, unsigned int)
@@ -42,4 +43,11 @@ enum nfcc_initial_core_reset_ntf { 
	DEFAULT_INITIAL_CORE_RESET_NTF, /*2*/

};



enum nfcc_chip_variant {

	NFCC_NQ_210		= 0x48,	/**< NFCC NQ210 */

	NFCC_NQ_220		= 0x58,	/**< NFCC NQ220 */

	NFCC_NQ_310		= 0x40,	/**< NFCC NQ310 */

	NFCC_NQ_330		= 0x51,	/**< NFCC NQ330 */

	NFCC_NOT_SUPPORTED	= 0xFF	/**< NFCC is not supported */

};

#endif

include/linux/nfcinfo.h

0 → 100644
+6 −0
Original line number Diff line number Diff line 
#ifndef _NFCINFO_H

#define _NFCINFO_H



#include <uapi/linux/nfc/nfcinfo.h>



#endif

include/uapi/linux/Kbuild

+1 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ header-y += usb/ 
header-y += wimax/

header-y += ../../../drivers/staging/android/uapi/

header-y += mfd/

header-y += nfc/



genhdr-y += version.h

include/uapi/linux/nfc/Kbuild

0 → 100644
+2 −0
Original line number Diff line number Diff line 
#UAPI export list

header-y += nfcinfo.h