/*
* Marvell NFC driver: major functions
*
- * Copyright (C) 2014, Marvell International Ltd.
+ * Copyright (C) 2014-2015 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
*/
#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>
#include "nfcmrvl.h"
-#define VERSION "1.0"
-
static int nfcmrvl_nci_open(struct nci_dev *ndev)
{
struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
if (test_and_set_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
return 0;
+ /* Reset possible fault of previous session */
+ clear_bit(NFCMRVL_PHY_ERROR, &priv->flags);
+
err = priv->if_ops->nci_open(priv);
if (err)
skb->dev = (void *)ndev;
- if (!test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
- return -EBUSY;
+ if (priv->config.hci_muxed) {
+ unsigned char *hdr;
+ unsigned char len = skb->len;
+
+ hdr = (char *) skb_push(skb, NFCMRVL_HCI_EVENT_HEADER_SIZE);
+ hdr[0] = NFCMRVL_HCI_COMMAND_CODE;
+ hdr[1] = NFCMRVL_HCI_OGF;
+ hdr[2] = NFCMRVL_HCI_OCF;
+ hdr[3] = len;
+ }
return priv->if_ops->nci_send(priv, skb);
}
static int nfcmrvl_nci_setup(struct nci_dev *ndev)
{
- __u8 val;
-
- val = NFCMRVL_GPIO_PIN_NFC_NOT_ALLOWED;
- nci_set_config(ndev, NFCMRVL_NOT_ALLOWED_ID, 1, &val);
- val = NFCMRVL_GPIO_PIN_NFC_ACTIVE;
- nci_set_config(ndev, NFCMRVL_ACTIVE_ID, 1, &val);
- val = NFCMRVL_EXT_COEX_ENABLE;
- nci_set_config(ndev, NFCMRVL_EXT_COEX_ID, 1, &val);
+ __u8 val = 1;
+ nci_set_config(ndev, NFCMRVL_PB_BAIL_OUT, 1, &val);
return 0;
}
+static int nfcmrvl_nci_fw_download(struct nci_dev *ndev,
+ const char *firmware_name)
+{
+ return nfcmrvl_fw_dnld_start(ndev, firmware_name);
+}
+
static struct nci_ops nfcmrvl_nci_ops = {
.open = nfcmrvl_nci_open,
.close = nfcmrvl_nci_close,
.send = nfcmrvl_nci_send,
.setup = nfcmrvl_nci_setup,
+ .fw_download = nfcmrvl_nci_fw_download,
};
-struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
- struct nfcmrvl_if_ops *ops,
- struct device *dev)
+struct nfcmrvl_private *nfcmrvl_nci_register_dev(enum nfcmrvl_phy phy,
+ void *drv_data,
+ struct nfcmrvl_if_ops *ops,
+ struct device *dev,
+ struct nfcmrvl_platform_data *pdata)
{
struct nfcmrvl_private *priv;
int rc;
+ int headroom;
+ int tailroom;
u32 protocols;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
priv->drv_data = drv_data;
priv->if_ops = ops;
priv->dev = dev;
+ priv->phy = phy;
+
+ memcpy(&priv->config, pdata, sizeof(*pdata));
+
+ if (priv->config.reset_n_io) {
+ rc = devm_gpio_request_one(dev,
+ 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 (phy == NFCMRVL_PHY_SPI) {
+ headroom = NCI_SPI_HDR_LEN;
+ tailroom = 1;
+ } else
+ headroom = tailroom = 0;
+
+ 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_ISO15693_MASK
| NFC_PROTO_NFC_DEP_MASK;
- priv->ndev = nci_allocate_device(&nfcmrvl_nci_ops, protocols, 0, 0);
+ priv->ndev = nci_allocate_device(&nfcmrvl_nci_ops, protocols,
+ headroom, tailroom);
if (!priv->ndev) {
nfc_err(dev, "nci_allocate_device failed\n");
rc = -ENOMEM;
rc = nci_register_device(priv->ndev);
if (rc) {
nfc_err(dev, "nci_register_device failed %d\n", rc);
- nci_free_device(priv->ndev);
- goto error;
+ goto error_free_dev;
+ }
+
+ /* Ensure that controller is powered off */
+ nfcmrvl_chip_halt(priv);
+
+ rc = nfcmrvl_fw_dnld_init(priv);
+ if (rc) {
+ nfc_err(dev, "failed to initialize FW download %d\n", rc);
+ goto error_free_dev;
}
nfc_info(dev, "registered with nci successfully\n");
return priv;
+error_free_dev:
+ nci_free_device(priv->ndev);
error:
kfree(priv);
return ERR_PTR(rc);
{
struct nci_dev *ndev = priv->ndev;
+ if (priv->ndev->nfc_dev->fw_download_in_progress)
+ nfcmrvl_fw_dnld_abort(priv);
+
+ nfcmrvl_fw_dnld_deinit(priv);
+
+ if (priv->config.reset_n_io)
+ devm_gpio_free(priv->dev, priv->config.reset_n_io);
+
nci_unregister_device(ndev);
nci_free_device(ndev);
kfree(priv);
}
EXPORT_SYMBOL_GPL(nfcmrvl_nci_unregister_dev);
-int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, void *data, int count)
+int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, struct sk_buff *skb)
{
- struct sk_buff *skb;
+ 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 */
+ skb_pull(skb, NFCMRVL_HCI_EVENT_HEADER_SIZE);
+ } else {
+ /* Skip this packet */
+ kfree_skb(skb);
+ return 0;
+ }
+ }
- skb = nci_skb_alloc(priv->ndev, count, GFP_ATOMIC);
- if (!skb)
- return -ENOMEM;
+ if (priv->ndev->nfc_dev->fw_download_in_progress) {
+ nfcmrvl_fw_dnld_recv_frame(priv, skb);
+ return 0;
+ }
- memcpy(skb_put(skb, count), data, count);
- nci_recv_frame(priv->ndev, skb);
+ if (test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
+ nci_recv_frame(priv->ndev, skb);
+ else {
+ /* Drop this packet since nobody wants it */
+ kfree_skb(skb);
+ return 0;
+ }
- return count;
+ return 0;
}
EXPORT_SYMBOL_GPL(nfcmrvl_nci_recv_frame);
+void nfcmrvl_chip_reset(struct nfcmrvl_private *priv)
+{
+ /* Reset possible fault of previous session */
+ clear_bit(NFCMRVL_PHY_ERROR, &priv->flags);
+
+ if (priv->config.reset_n_io) {
+ nfc_info(priv->dev, "reset the chip\n");
+ gpio_set_value(priv->config.reset_n_io, 0);
+ usleep_range(5000, 10000);
+ gpio_set_value(priv->config.reset_n_io, 1);
+ } else
+ nfc_info(priv->dev, "no reset available on this interface\n");
+}
+
+void nfcmrvl_chip_halt(struct nfcmrvl_private *priv)
+{
+ if (priv->config.reset_n_io)
+ gpio_set_value(priv->config.reset_n_io, 0);
+}
+
+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;
+}
+EXPORT_SYMBOL_GPL(nfcmrvl_parse_dt);
+
MODULE_AUTHOR("Marvell International Ltd.");
-MODULE_DESCRIPTION("Marvell NFC driver ver " VERSION);
-MODULE_VERSION(VERSION);
+MODULE_DESCRIPTION("Marvell NFC driver");
MODULE_LICENSE("GPL v2");
Code Review / kvmfornfv.git / blobdiff