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
Samuel Ortiz
Родитель
9961127d4b
Коммит
dc14bdef87
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@ -19,6 +19,7 @@
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#include <linux/module.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/of_gpio.h>
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#include <linux/nfc.h>
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#include <net/nfc/nci.h>
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#include <net/nfc/nci_core.h>
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@ -65,7 +66,7 @@ static int nfcmrvl_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
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if (!test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
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return -EBUSY;
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if (priv->hci_muxed) {
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if (priv->config.hci_muxed) {
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unsigned char *hdr;
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unsigned char len = skb->len;
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@ -92,9 +93,9 @@ static struct nci_ops nfcmrvl_nci_ops = {
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};
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struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
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struct nfcmrvl_if_ops *ops,
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struct device *dev,
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unsigned int flags)
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struct nfcmrvl_if_ops *ops,
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struct device *dev,
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struct nfcmrvl_platform_data *pdata)
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{
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struct nfcmrvl_private *priv;
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int rc;
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@ -108,23 +109,24 @@ struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
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priv->drv_data = drv_data;
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priv->if_ops = ops;
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priv->dev = dev;
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priv->hci_muxed = (flags & NFCMRVL_DEV_FLAG_HCI_MUXED) ? 1 : 0;
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priv->reset_n_io = NFCMRVL_DEV_FLAG_GET_RESET_N_IO(flags);
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if (priv->reset_n_io) {
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memcpy(&priv->config, pdata, sizeof(*pdata));
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if (priv->config.reset_n_io) {
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rc = devm_gpio_request_one(dev,
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priv->reset_n_io,
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priv->config.reset_n_io,
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GPIOF_OUT_INIT_LOW,
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"nfcmrvl_reset_n");
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if (rc < 0)
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nfc_err(dev, "failed to request reset_n io\n");
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}
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if (priv->hci_muxed)
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if (priv->config.hci_muxed)
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headroom = NFCMRVL_HCI_EVENT_HEADER_SIZE;
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protocols = NFC_PROTO_JEWEL_MASK
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| NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
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| NFC_PROTO_MIFARE_MASK
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| NFC_PROTO_FELICA_MASK
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| NFC_PROTO_ISO14443_MASK
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| NFC_PROTO_ISO14443_B_MASK
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| NFC_PROTO_NFC_DEP_MASK;
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@ -169,7 +171,7 @@ EXPORT_SYMBOL_GPL(nfcmrvl_nci_unregister_dev);
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int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, struct sk_buff *skb)
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{
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if (priv->hci_muxed) {
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if (priv->config.hci_muxed) {
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if (skb->data[0] == NFCMRVL_HCI_EVENT_CODE &&
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skb->data[1] == NFCMRVL_HCI_NFC_EVENT_CODE) {
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/* Data packet, let's extract NCI payload */
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@ -200,15 +202,51 @@ void nfcmrvl_chip_reset(struct nfcmrvl_private *priv)
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* To be improved.
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*/
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if (priv->reset_n_io) {
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if (priv->config.reset_n_io) {
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nfc_info(priv->dev, "reset the chip\n");
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gpio_set_value(priv->reset_n_io, 0);
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gpio_set_value(priv->config.reset_n_io, 0);
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usleep_range(5000, 10000);
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gpio_set_value(priv->reset_n_io, 1);
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gpio_set_value(priv->config.reset_n_io, 1);
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} else
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nfc_info(priv->dev, "no reset available on this interface\n");
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}
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#ifdef CONFIG_OF
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int nfcmrvl_parse_dt(struct device_node *node,
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struct nfcmrvl_platform_data *pdata)
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{
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int reset_n_io;
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reset_n_io = of_get_named_gpio(node, "reset-n-io", 0);
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if (reset_n_io < 0) {
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pr_info("no reset-n-io config\n");
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reset_n_io = 0;
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} else if (!gpio_is_valid(reset_n_io)) {
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pr_err("invalid reset-n-io GPIO\n");
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return reset_n_io;
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}
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pdata->reset_n_io = reset_n_io;
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if (of_find_property(node, "hci-muxed", NULL))
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pdata->hci_muxed = 1;
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else
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pdata->hci_muxed = 0;
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return 0;
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}
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#else
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int nfcmrvl_parse_dt(struct device_node *node,
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struct nfcmrvl_platform_data *pdata)
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{
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return -ENODEV;
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}
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#endif
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EXPORT_SYMBOL_GPL(nfcmrvl_parse_dt);
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MODULE_AUTHOR("Marvell International Ltd.");
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MODULE_DESCRIPTION("Marvell NFC driver ver " VERSION);
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MODULE_VERSION(VERSION);
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@ -16,6 +16,11 @@
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* this warranty disclaimer.
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**/
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#ifndef _NFCMRVL_H_
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#define _NFCMRVL_H_
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#include <linux/platform_data/nfcmrvl.h>
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/* Define private flags: */
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#define NFCMRVL_NCI_RUNNING 1
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@ -38,22 +43,25 @@
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#define NFCMRVL_HCI_OGF 0x81
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#define NFCMRVL_HCI_OCF 0xFE
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#define NFCMRVL_DEV_FLAG_HCI_MUXED (1 << 0)
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#define NFCMRVL_DEV_FLAG_SET_RESET_N_IO(X) ((X) << 16)
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#define NFCMRVL_DEV_FLAG_GET_RESET_N_IO(X) ((X) >> 16)
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struct nfcmrvl_private {
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/* Tell if NCI packets are encapsulated in HCI ones */
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int hci_muxed;
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unsigned long flags;
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/* Platform configuration */
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struct nfcmrvl_platform_data config;
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struct nci_dev *ndev;
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/* Reset IO (0 if not available) */
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int reset_n_io;
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/*
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** PHY related information
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*/
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unsigned long flags;
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/* PHY driver context */
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void *drv_data;
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/* PHY device */
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struct device *dev;
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/* Low level driver ops */
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struct nfcmrvl_if_ops *if_ops;
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};
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@ -66,8 +74,14 @@ struct nfcmrvl_if_ops {
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void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv);
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int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, struct sk_buff *skb);
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struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
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struct nfcmrvl_if_ops *ops,
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struct device *dev,
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unsigned int flags);
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struct nfcmrvl_if_ops *ops,
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struct device *dev,
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struct nfcmrvl_platform_data *pdata);
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void nfcmrvl_chip_reset(struct nfcmrvl_private *priv);
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int nfcmrvl_parse_dt(struct device_node *node,
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struct nfcmrvl_platform_data *pdata);
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#endif
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@ -302,6 +302,10 @@ static int nfcmrvl_probe(struct usb_interface *intf,
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struct nfcmrvl_private *priv;
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int i;
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struct usb_device *udev = interface_to_usbdev(intf);
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struct nfcmrvl_platform_data config;
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/* No configuration for USB */
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memset(&config, 0, sizeof(config));
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nfc_info(&udev->dev, "intf %p id %p\n", intf, id);
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@ -339,7 +343,7 @@ static int nfcmrvl_probe(struct usb_interface *intf,
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init_usb_anchor(&drv_data->deferred);
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priv = nfcmrvl_nci_register_dev(drv_data, &usb_ops,
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&drv_data->udev->dev, 0);
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&drv_data->udev->dev, &config);
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if (IS_ERR(priv))
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return PTR_ERR(priv);
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@ -0,0 +1,31 @@
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/*
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* Copyright (C) 2015, Marvell International Ltd.
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*
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* This software file (the "File") is distributed by Marvell International
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* Ltd. under the terms of the GNU General Public License Version 2, June 1991
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* (the "License"). You may use, redistribute and/or modify this File in
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* accordance with the terms and conditions of the License, a copy of which
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* is available on the worldwide web at
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
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*
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* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
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* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
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* this warranty disclaimer.
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*/
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#ifndef _NFCMRVL_PTF_H_
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#define _NFCMRVL_PTF_H_
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struct nfcmrvl_platform_data {
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/*
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* Generic
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*/
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/* GPIO that is wired to RESET_N signal */
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unsigned int reset_n_io;
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/* Tell if transport is muxed in HCI one */
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unsigned int hci_muxed;
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};
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#endif /* _NFCMRVL_PTF_H_ */
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