2 * Marvell NFC driver: major functions
4 * Copyright (C) 2014-2015 Marvell International Ltd.
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available on the worldwide web at
11 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
14 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
15 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
16 * this warranty disclaimer.
19 #include <linux/module.h>
20 #include <linux/gpio.h>
21 #include <linux/delay.h>
22 #include <linux/of_gpio.h>
23 #include <linux/nfc.h>
24 #include <net/nfc/nci.h>
25 #include <net/nfc/nci_core.h>
28 static int nfcmrvl_nci_open(struct nci_dev *ndev)
30 struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
33 if (test_and_set_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
36 /* Reset possible fault of previous session */
37 clear_bit(NFCMRVL_PHY_ERROR, &priv->flags);
39 err = priv->if_ops->nci_open(priv);
42 clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags);
47 static int nfcmrvl_nci_close(struct nci_dev *ndev)
49 struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
51 if (!test_and_clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
54 priv->if_ops->nci_close(priv);
59 static int nfcmrvl_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
61 struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
63 nfc_info(priv->dev, "send entry, len %d\n", skb->len);
65 skb->dev = (void *)ndev;
67 if (priv->config.hci_muxed) {
69 unsigned char len = skb->len;
71 hdr = (char *) skb_push(skb, NFCMRVL_HCI_EVENT_HEADER_SIZE);
72 hdr[0] = NFCMRVL_HCI_COMMAND_CODE;
73 hdr[1] = NFCMRVL_HCI_OGF;
74 hdr[2] = NFCMRVL_HCI_OCF;
78 return priv->if_ops->nci_send(priv, skb);
81 static int nfcmrvl_nci_setup(struct nci_dev *ndev)
85 nci_set_config(ndev, NFCMRVL_PB_BAIL_OUT, 1, &val);
89 static int nfcmrvl_nci_fw_download(struct nci_dev *ndev,
90 const char *firmware_name)
92 return nfcmrvl_fw_dnld_start(ndev, firmware_name);
95 static struct nci_ops nfcmrvl_nci_ops = {
96 .open = nfcmrvl_nci_open,
97 .close = nfcmrvl_nci_close,
98 .send = nfcmrvl_nci_send,
99 .setup = nfcmrvl_nci_setup,
100 .fw_download = nfcmrvl_nci_fw_download,
103 struct nfcmrvl_private *nfcmrvl_nci_register_dev(enum nfcmrvl_phy phy,
105 struct nfcmrvl_if_ops *ops,
107 struct nfcmrvl_platform_data *pdata)
109 struct nfcmrvl_private *priv;
115 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
117 return ERR_PTR(-ENOMEM);
119 priv->drv_data = drv_data;
124 memcpy(&priv->config, pdata, sizeof(*pdata));
126 if (priv->config.reset_n_io) {
127 rc = devm_gpio_request_one(dev,
128 priv->config.reset_n_io,
132 nfc_err(dev, "failed to request reset_n io\n");
135 headroom = tailroom = 0;
137 if (priv->config.hci_muxed)
138 headroom += NFCMRVL_HCI_EVENT_HEADER_SIZE;
140 protocols = NFC_PROTO_JEWEL_MASK
141 | NFC_PROTO_MIFARE_MASK
142 | NFC_PROTO_FELICA_MASK
143 | NFC_PROTO_ISO14443_MASK
144 | NFC_PROTO_ISO14443_B_MASK
145 | NFC_PROTO_ISO15693_MASK
146 | NFC_PROTO_NFC_DEP_MASK;
148 priv->ndev = nci_allocate_device(&nfcmrvl_nci_ops, protocols,
151 nfc_err(dev, "nci_allocate_device failed\n");
156 nci_set_drvdata(priv->ndev, priv);
158 rc = nci_register_device(priv->ndev);
160 nfc_err(dev, "nci_register_device failed %d\n", rc);
164 /* Ensure that controller is powered off */
165 nfcmrvl_chip_halt(priv);
167 rc = nfcmrvl_fw_dnld_init(priv);
169 nfc_err(dev, "failed to initialize FW download %d\n", rc);
173 nfc_info(dev, "registered with nci successfully\n");
177 nci_free_device(priv->ndev);
182 EXPORT_SYMBOL_GPL(nfcmrvl_nci_register_dev);
184 void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv)
186 struct nci_dev *ndev = priv->ndev;
188 if (priv->ndev->nfc_dev->fw_download_in_progress)
189 nfcmrvl_fw_dnld_abort(priv);
191 nfcmrvl_fw_dnld_deinit(priv);
193 nci_unregister_device(ndev);
194 nci_free_device(ndev);
197 EXPORT_SYMBOL_GPL(nfcmrvl_nci_unregister_dev);
199 int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, struct sk_buff *skb)
201 if (priv->config.hci_muxed) {
202 if (skb->data[0] == NFCMRVL_HCI_EVENT_CODE &&
203 skb->data[1] == NFCMRVL_HCI_NFC_EVENT_CODE) {
204 /* Data packet, let's extract NCI payload */
205 skb_pull(skb, NFCMRVL_HCI_EVENT_HEADER_SIZE);
207 /* Skip this packet */
213 if (priv->ndev->nfc_dev->fw_download_in_progress) {
214 nfcmrvl_fw_dnld_recv_frame(priv, skb);
218 if (test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
219 nci_recv_frame(priv->ndev, skb);
221 /* Drop this packet since nobody wants it */
228 EXPORT_SYMBOL_GPL(nfcmrvl_nci_recv_frame);
230 void nfcmrvl_chip_reset(struct nfcmrvl_private *priv)
232 /* Reset possible fault of previous session */
233 clear_bit(NFCMRVL_PHY_ERROR, &priv->flags);
235 if (priv->config.reset_n_io) {
236 nfc_info(priv->dev, "reset the chip\n");
237 gpio_set_value(priv->config.reset_n_io, 0);
238 usleep_range(5000, 10000);
239 gpio_set_value(priv->config.reset_n_io, 1);
241 nfc_info(priv->dev, "no reset available on this interface\n");
244 void nfcmrvl_chip_halt(struct nfcmrvl_private *priv)
246 if (priv->config.reset_n_io)
247 gpio_set_value(priv->config.reset_n_io, 0);
252 int nfcmrvl_parse_dt(struct device_node *node,
253 struct nfcmrvl_platform_data *pdata)
257 reset_n_io = of_get_named_gpio(node, "reset-n-io", 0);
258 if (reset_n_io < 0) {
259 pr_info("no reset-n-io config\n");
261 } else if (!gpio_is_valid(reset_n_io)) {
262 pr_err("invalid reset-n-io GPIO\n");
265 pdata->reset_n_io = reset_n_io;
267 if (of_find_property(node, "hci-muxed", NULL))
268 pdata->hci_muxed = 1;
270 pdata->hci_muxed = 0;
277 int nfcmrvl_parse_dt(struct device_node *node,
278 struct nfcmrvl_platform_data *pdata)
284 EXPORT_SYMBOL_GPL(nfcmrvl_parse_dt);
286 MODULE_AUTHOR("Marvell International Ltd.");
287 MODULE_DESCRIPTION("Marvell NFC driver");
288 MODULE_LICENSE("GPL v2");