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Commit dc14bdef authored by Vincent Cuissard's avatar Vincent Cuissard Committed by Samuel Ortiz
Browse files

NFC: nfcmrvl: add platform_data and DT configuration 



Declare nfcmrvl platform_data structure and few DT parameters
for nfcmrvl driver.

Signed-off-by: default avatarVincent Cuissard <cuissard@marvell.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 9961127d

drivers/nfc/nfcmrvl/main.c

+52 −14
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/module.h>

#include <linux/gpio.h>

#include <linux/delay.h>

#include <linux/of_gpio.h>

#include <linux/nfc.h>

#include <net/nfc/nci.h>

#include <net/nfc/nci_core.h>
@@ -65,7 +66,7 @@ static int nfcmrvl_nci_send(struct nci_dev *ndev, struct sk_buff *skb) 
	if (!test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))

		return -EBUSY;



	if (priv->hci_muxed) {

	if (priv->config.hci_muxed) {

		unsigned char *hdr;

		unsigned char len = skb->len;
@@ -94,7 +95,7 @@ static struct nci_ops nfcmrvl_nci_ops = { 
struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,

				struct nfcmrvl_if_ops *ops,

				struct device *dev,

						 unsigned int flags)

				struct nfcmrvl_platform_data *pdata)

{

	struct nfcmrvl_private *priv;

	int rc;
@@ -108,23 +109,24 @@ struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data, 
	priv->drv_data = drv_data;

	priv->if_ops = ops;

	priv->dev = dev;

	priv->hci_muxed = (flags & NFCMRVL_DEV_FLAG_HCI_MUXED) ? 1 : 0;

	priv->reset_n_io = NFCMRVL_DEV_FLAG_GET_RESET_N_IO(flags);



	if (priv->reset_n_io) {

	memcpy(&priv->config, pdata, sizeof(*pdata));



	if (priv->config.reset_n_io) {

		rc = devm_gpio_request_one(dev,

					   priv->reset_n_io,

					   priv->config.reset_n_io,

					   GPIOF_OUT_INIT_LOW,

					   "nfcmrvl_reset_n");

		if (rc < 0)

			nfc_err(dev, "failed to request reset_n io\n");

	}



	if (priv->hci_muxed)

	if (priv->config.hci_muxed)

		headroom = NFCMRVL_HCI_EVENT_HEADER_SIZE;



	protocols = NFC_PROTO_JEWEL_MASK

		| NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK

		| NFC_PROTO_MIFARE_MASK

		| NFC_PROTO_FELICA_MASK

		| NFC_PROTO_ISO14443_MASK

		| NFC_PROTO_ISO14443_B_MASK

		| NFC_PROTO_NFC_DEP_MASK;
@@ -169,7 +171,7 @@ EXPORT_SYMBOL_GPL(nfcmrvl_nci_unregister_dev); 


int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, struct sk_buff *skb)

{

	if (priv->hci_muxed) {

	if (priv->config.hci_muxed) {

		if (skb->data[0] == NFCMRVL_HCI_EVENT_CODE &&

		    skb->data[1] == NFCMRVL_HCI_NFC_EVENT_CODE) {

			/* Data packet, let's extract NCI payload */
@@ -200,15 +202,51 @@ void nfcmrvl_chip_reset(struct nfcmrvl_private *priv) 
	 * To be improved.

	 */



	if (priv->reset_n_io) {

	if (priv->config.reset_n_io) {

		nfc_info(priv->dev, "reset the chip\n");

		gpio_set_value(priv->reset_n_io, 0);

		gpio_set_value(priv->config.reset_n_io, 0);

		usleep_range(5000, 10000);

		gpio_set_value(priv->reset_n_io, 1);

		gpio_set_value(priv->config.reset_n_io, 1);

	} else

		nfc_info(priv->dev, "no reset available on this interface\n");

}



#ifdef CONFIG_OF



int nfcmrvl_parse_dt(struct device_node *node,

		     struct nfcmrvl_platform_data *pdata)

{

	int reset_n_io;



	reset_n_io = of_get_named_gpio(node, "reset-n-io", 0);

	if (reset_n_io < 0) {

		pr_info("no reset-n-io config\n");

		reset_n_io = 0;

	} else if (!gpio_is_valid(reset_n_io)) {

		pr_err("invalid reset-n-io GPIO\n");

		return reset_n_io;

	}

	pdata->reset_n_io = reset_n_io;



	if (of_find_property(node, "hci-muxed", NULL))

		pdata->hci_muxed = 1;

	else

		pdata->hci_muxed = 0;



	return 0;

}



#else



int nfcmrvl_parse_dt(struct device_node *node,

		     struct nfcmrvl_platform_data *pdata)

{

	return -ENODEV;

}



#endif

EXPORT_SYMBOL_GPL(nfcmrvl_parse_dt);



MODULE_AUTHOR("Marvell International Ltd.");

MODULE_DESCRIPTION("Marvell NFC driver ver " VERSION);

MODULE_VERSION(VERSION);

drivers/nfc/nfcmrvl/nfcmrvl.h

+25 −11
Original line number Diff line number Diff line
@@ -16,6 +16,11 @@ 
 * this warranty disclaimer.

 **/



#ifndef _NFCMRVL_H_

#define _NFCMRVL_H_



#include <linux/platform_data/nfcmrvl.h>



/* Define private flags: */

#define NFCMRVL_NCI_RUNNING			1
@@ -38,22 +43,25 @@ 
#define NFCMRVL_HCI_OGF				0x81

#define NFCMRVL_HCI_OCF				0xFE



#define NFCMRVL_DEV_FLAG_HCI_MUXED		(1 << 0)

#define NFCMRVL_DEV_FLAG_SET_RESET_N_IO(X)	((X) << 16)

#define NFCMRVL_DEV_FLAG_GET_RESET_N_IO(X)	((X) >> 16)



struct nfcmrvl_private {



	/* Tell if NCI packets are encapsulated in HCI ones */

	int hci_muxed;

	unsigned long flags;



	/* Platform configuration */

	struct nfcmrvl_platform_data config;



	struct nci_dev *ndev;



	/* Reset IO (0 if not available) */

	int reset_n_io;

	/*

	** PHY related information

	*/



	unsigned long flags;

	/* PHY driver context */

	void *drv_data;

	/* PHY device */

	struct device *dev;

	/* Low level driver ops */

	struct nfcmrvl_if_ops *if_ops;

};
@@ -68,6 +76,12 @@ int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, struct sk_buff *skb); 
struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,

				struct nfcmrvl_if_ops *ops,

				struct device *dev,

						 unsigned int flags);

				struct nfcmrvl_platform_data *pdata);





void nfcmrvl_chip_reset(struct nfcmrvl_private *priv);



int nfcmrvl_parse_dt(struct device_node *node,

		     struct nfcmrvl_platform_data *pdata);



#endif

drivers/nfc/nfcmrvl/usb.c

+5 −1
Original line number Diff line number Diff line
@@ -302,6 +302,10 @@ static int nfcmrvl_probe(struct usb_interface *intf, 
	struct nfcmrvl_private *priv;

	int i;

	struct usb_device *udev = interface_to_usbdev(intf);

	struct nfcmrvl_platform_data config;



	/* No configuration for USB */

	memset(&config, 0, sizeof(config));



	nfc_info(&udev->dev, "intf %p id %p\n", intf, id);
@@ -339,7 +343,7 @@ static int nfcmrvl_probe(struct usb_interface *intf, 
	init_usb_anchor(&drv_data->deferred);



	priv = nfcmrvl_nci_register_dev(drv_data, &usb_ops,

					&drv_data->udev->dev, 0);

					&drv_data->udev->dev, &config);

	if (IS_ERR(priv))

		return PTR_ERR(priv);

include/linux/platform_data/nfcmrvl.h

0 → 100644
+31 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2015, Marvell International Ltd.

 *

 * This software file (the "File") is distributed by Marvell International

 * Ltd. under the terms of the GNU General Public License Version 2, June 1991

 * (the "License").  You may use, redistribute and/or modify this File in

 * accordance with the terms and conditions of the License, a copy of which

 * is available on the worldwide web at

 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.

 *

 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE

 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about

 * this warranty disclaimer.

 */



#ifndef _NFCMRVL_PTF_H_

#define _NFCMRVL_PTF_H_



struct nfcmrvl_platform_data {

	/*

	 * Generic

	 */



	/* GPIO that is wired to RESET_N signal */

	unsigned int reset_n_io;

	/* Tell if transport is muxed in HCI one */

	unsigned int hci_muxed;

};



#endif /* _NFCMRVL_PTF_H_ */