hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

NFC: nfcmrvl: add platform_data and DT configuration 

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

Signed-off-by: Vincent Cuissard <cuissard@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Vincent Cuissard 2015-06-11 14:00:19 +02:00 committed by Samuel Ortiz
parent 9961127d4b
commit dc14bdef87
4 changed files with 113 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
drivers/nfc/nfcmrvl/main.c
View File

@ -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);

32
drivers/nfc/nfcmrvl/nfcmrvl.h
View File

@ -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

6
drivers/nfc/nfcmrvl/usb.c
View File

@ -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);

31
include/linux/platform_data/nfcmrvl.h Normal file
View File

@ -0,0 +1,31 @@
/*
* 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_ */