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Amitkumar Karwarf26e30c2014-01-06 12:58:19 -08001/*
2 * Marvell NFC driver: major functions
3 *
Vincent Cuissardfb101c02015-10-26 10:27:37 +01004 * Copyright (C) 2014-2015 Marvell International Ltd.
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -08005 *
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.
12 *
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.
17 */
18
19#include <linux/module.h>
Vincent Cuissard4a2b947f2015-06-11 11:25:46 +020020#include <linux/gpio.h>
21#include <linux/delay.h>
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +020022#include <linux/of_gpio.h>
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -080023#include <linux/nfc.h>
24#include <net/nfc/nci.h>
25#include <net/nfc/nci_core.h>
26#include "nfcmrvl.h"
27
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -080028static int nfcmrvl_nci_open(struct nci_dev *ndev)
29{
30 struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
31 int err;
32
33 if (test_and_set_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
34 return 0;
35
Vincent Cuissardb5b3e232015-10-26 10:27:41 +010036 /* Reset possible fault of previous session */
37 clear_bit(NFCMRVL_PHY_ERROR, &priv->flags);
38
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -080039 err = priv->if_ops->nci_open(priv);
40
41 if (err)
42 clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags);
43
44 return err;
45}
46
47static int nfcmrvl_nci_close(struct nci_dev *ndev)
48{
49 struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
50
51 if (!test_and_clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
52 return 0;
53
54 priv->if_ops->nci_close(priv);
55
56 return 0;
57}
58
59static int nfcmrvl_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
60{
61 struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
62
63 nfc_info(priv->dev, "send entry, len %d\n", skb->len);
64
65 skb->dev = (void *)ndev;
66
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +020067 if (priv->config.hci_muxed) {
Vincent Cuissardf1f1a7d2015-06-11 11:25:43 +020068 unsigned char *hdr;
69 unsigned char len = skb->len;
70
Johannes Bergd58ff352017-06-16 14:29:23 +020071 hdr = skb_push(skb, NFCMRVL_HCI_EVENT_HEADER_SIZE);
Vincent Cuissardf1f1a7d2015-06-11 11:25:43 +020072 hdr[0] = NFCMRVL_HCI_COMMAND_CODE;
73 hdr[1] = NFCMRVL_HCI_OGF;
74 hdr[2] = NFCMRVL_HCI_OCF;
75 hdr[3] = len;
76 }
77
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -080078 return priv->if_ops->nci_send(priv, skb);
79}
80
Amitkumar Karwar15203b42014-01-06 12:58:20 -080081static int nfcmrvl_nci_setup(struct nci_dev *ndev)
82{
Vincent Cuissardd0dcad82015-06-12 15:35:54 +020083 __u8 val = 1;
84
85 nci_set_config(ndev, NFCMRVL_PB_BAIL_OUT, 1, &val);
Amitkumar Karwar15203b42014-01-06 12:58:20 -080086 return 0;
87}
88
Vincent Cuissard3194c682015-10-26 10:27:39 +010089static int nfcmrvl_nci_fw_download(struct nci_dev *ndev,
90 const char *firmware_name)
91{
92 return nfcmrvl_fw_dnld_start(ndev, firmware_name);
93}
94
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -080095static struct nci_ops nfcmrvl_nci_ops = {
96 .open = nfcmrvl_nci_open,
97 .close = nfcmrvl_nci_close,
98 .send = nfcmrvl_nci_send,
Amitkumar Karwar15203b42014-01-06 12:58:20 -080099 .setup = nfcmrvl_nci_setup,
Vincent Cuissard3194c682015-10-26 10:27:39 +0100100 .fw_download = nfcmrvl_nci_fw_download,
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800101};
102
Vincent Cuissard58d34aa2015-10-26 10:27:40 +0100103struct nfcmrvl_private *nfcmrvl_nci_register_dev(enum nfcmrvl_phy phy,
104 void *drv_data,
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200105 struct nfcmrvl_if_ops *ops,
106 struct device *dev,
107 struct nfcmrvl_platform_data *pdata)
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800108{
109 struct nfcmrvl_private *priv;
110 int rc;
Vincent Cuissard58d34aa2015-10-26 10:27:40 +0100111 int headroom;
112 int tailroom;
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800113 u32 protocols;
114
115 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
116 if (!priv)
117 return ERR_PTR(-ENOMEM);
118
119 priv->drv_data = drv_data;
120 priv->if_ops = ops;
121 priv->dev = dev;
Vincent Cuissard58d34aa2015-10-26 10:27:40 +0100122 priv->phy = phy;
Vincent Cuissard4a2b947f2015-06-11 11:25:46 +0200123
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200124 memcpy(&priv->config, pdata, sizeof(*pdata));
125
Johan Hovolde33a3f82017-03-30 12:15:42 +0200126 if (gpio_is_valid(priv->config.reset_n_io)) {
Johan Hovold0cbe4012017-03-30 12:15:37 +0200127 rc = gpio_request_one(priv->config.reset_n_io,
128 GPIOF_OUT_INIT_LOW,
129 "nfcmrvl_reset_n");
130 if (rc < 0) {
Johan Hovolde33a3f82017-03-30 12:15:42 +0200131 priv->config.reset_n_io = -EINVAL;
Vincent Cuissard4a2b947f2015-06-11 11:25:46 +0200132 nfc_err(dev, "failed to request reset_n io\n");
Johan Hovold0cbe4012017-03-30 12:15:37 +0200133 }
Vincent Cuissard4a2b947f2015-06-11 11:25:46 +0200134 }
Vincent Cuissardf1f1a7d2015-06-11 11:25:43 +0200135
Vincent Cuissardcaf6e492015-10-26 10:27:44 +0100136 if (phy == NFCMRVL_PHY_SPI) {
137 headroom = NCI_SPI_HDR_LEN;
138 tailroom = 1;
139 } else
140 headroom = tailroom = 0;
Vincent Cuissard58d34aa2015-10-26 10:27:40 +0100141
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200142 if (priv->config.hci_muxed)
Vincent Cuissard58d34aa2015-10-26 10:27:40 +0100143 headroom += NFCMRVL_HCI_EVENT_HEADER_SIZE;
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800144
145 protocols = NFC_PROTO_JEWEL_MASK
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200146 | NFC_PROTO_MIFARE_MASK
147 | NFC_PROTO_FELICA_MASK
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800148 | NFC_PROTO_ISO14443_MASK
149 | NFC_PROTO_ISO14443_B_MASK
Vincent Cuissard83d56722015-06-12 15:35:52 +0200150 | NFC_PROTO_ISO15693_MASK
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800151 | NFC_PROTO_NFC_DEP_MASK;
152
Vincent Cuissardf1f1a7d2015-06-11 11:25:43 +0200153 priv->ndev = nci_allocate_device(&nfcmrvl_nci_ops, protocols,
Vincent Cuissard58d34aa2015-10-26 10:27:40 +0100154 headroom, tailroom);
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800155 if (!priv->ndev) {
Joe Perches3590ebc2015-04-07 00:17:00 -0700156 nfc_err(dev, "nci_allocate_device failed\n");
Amitkumar Karwarbb55dc22014-01-08 10:52:27 -0800157 rc = -ENOMEM;
Johan Hovold0cbe4012017-03-30 12:15:37 +0200158 goto error_free_gpio;
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800159 }
160
Vincent Cuissard3194c682015-10-26 10:27:39 +0100161 rc = nfcmrvl_fw_dnld_init(priv);
162 if (rc) {
163 nfc_err(dev, "failed to initialize FW download %d\n", rc);
164 goto error_free_dev;
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800165 }
166
Johan Hovold45dd39b2017-03-30 12:15:39 +0200167 nci_set_drvdata(priv->ndev, priv);
168
169 rc = nci_register_device(priv->ndev);
170 if (rc) {
171 nfc_err(dev, "nci_register_device failed %d\n", rc);
172 goto error_fw_dnld_deinit;
173 }
174
175 /* Ensure that controller is powered off */
176 nfcmrvl_chip_halt(priv);
177
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800178 nfc_info(dev, "registered with nci successfully\n");
179 return priv;
Amitkumar Karwarbb55dc22014-01-08 10:52:27 -0800180
Johan Hovold45dd39b2017-03-30 12:15:39 +0200181error_fw_dnld_deinit:
182 nfcmrvl_fw_dnld_deinit(priv);
Vincent Cuissard3194c682015-10-26 10:27:39 +0100183error_free_dev:
184 nci_free_device(priv->ndev);
Johan Hovold0cbe4012017-03-30 12:15:37 +0200185error_free_gpio:
Johan Hovolde33a3f82017-03-30 12:15:42 +0200186 if (gpio_is_valid(priv->config.reset_n_io))
Johan Hovold0cbe4012017-03-30 12:15:37 +0200187 gpio_free(priv->config.reset_n_io);
Amitkumar Karwarbb55dc22014-01-08 10:52:27 -0800188 kfree(priv);
189 return ERR_PTR(rc);
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800190}
191EXPORT_SYMBOL_GPL(nfcmrvl_nci_register_dev);
192
193void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv)
194{
195 struct nci_dev *ndev = priv->ndev;
196
Vincent Cuissard3194c682015-10-26 10:27:39 +0100197 if (priv->ndev->nfc_dev->fw_download_in_progress)
198 nfcmrvl_fw_dnld_abort(priv);
199
200 nfcmrvl_fw_dnld_deinit(priv);
201
Johan Hovolde33a3f82017-03-30 12:15:42 +0200202 if (gpio_is_valid(priv->config.reset_n_io))
Johan Hovold0cbe4012017-03-30 12:15:37 +0200203 gpio_free(priv->config.reset_n_io);
Vincent Cuissardb2fe2882015-11-03 19:19:34 +0100204
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800205 nci_unregister_device(ndev);
206 nci_free_device(ndev);
207 kfree(priv);
208}
209EXPORT_SYMBOL_GPL(nfcmrvl_nci_unregister_dev);
210
Vincent Cuissarde1bf80c2015-06-11 11:25:44 +0200211int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, struct sk_buff *skb)
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800212{
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200213 if (priv->config.hci_muxed) {
Vincent Cuissardf1f1a7d2015-06-11 11:25:43 +0200214 if (skb->data[0] == NFCMRVL_HCI_EVENT_CODE &&
215 skb->data[1] == NFCMRVL_HCI_NFC_EVENT_CODE) {
216 /* Data packet, let's extract NCI payload */
217 skb_pull(skb, NFCMRVL_HCI_EVENT_HEADER_SIZE);
218 } else {
219 /* Skip this packet */
220 kfree_skb(skb);
221 return 0;
222 }
223 }
224
Vincent Cuissard3194c682015-10-26 10:27:39 +0100225 if (priv->ndev->nfc_dev->fw_download_in_progress) {
226 nfcmrvl_fw_dnld_recv_frame(priv, skb);
227 return 0;
228 }
229
Vincent Cuissarde1bf80c2015-06-11 11:25:44 +0200230 if (test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
231 nci_recv_frame(priv->ndev, skb);
232 else {
233 /* Drop this packet since nobody wants it */
234 kfree_skb(skb);
235 return 0;
236 }
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800237
Vincent Cuissarde1bf80c2015-06-11 11:25:44 +0200238 return 0;
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800239}
240EXPORT_SYMBOL_GPL(nfcmrvl_nci_recv_frame);
241
Vincent Cuissard4a2b947f2015-06-11 11:25:46 +0200242void nfcmrvl_chip_reset(struct nfcmrvl_private *priv)
243{
Vincent Cuissardb5b3e232015-10-26 10:27:41 +0100244 /* Reset possible fault of previous session */
245 clear_bit(NFCMRVL_PHY_ERROR, &priv->flags);
Vincent Cuissard4a2b947f2015-06-11 11:25:46 +0200246
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200247 if (priv->config.reset_n_io) {
Vincent Cuissard4a2b947f2015-06-11 11:25:46 +0200248 nfc_info(priv->dev, "reset the chip\n");
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200249 gpio_set_value(priv->config.reset_n_io, 0);
Vincent Cuissard4a2b947f2015-06-11 11:25:46 +0200250 usleep_range(5000, 10000);
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200251 gpio_set_value(priv->config.reset_n_io, 1);
Vincent Cuissard4a2b947f2015-06-11 11:25:46 +0200252 } else
253 nfc_info(priv->dev, "no reset available on this interface\n");
254}
255
Vincent Cuissard3194c682015-10-26 10:27:39 +0100256void nfcmrvl_chip_halt(struct nfcmrvl_private *priv)
257{
258 if (priv->config.reset_n_io)
259 gpio_set_value(priv->config.reset_n_io, 0);
260}
261
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200262int nfcmrvl_parse_dt(struct device_node *node,
263 struct nfcmrvl_platform_data *pdata)
264{
265 int reset_n_io;
266
267 reset_n_io = of_get_named_gpio(node, "reset-n-io", 0);
268 if (reset_n_io < 0) {
269 pr_info("no reset-n-io config\n");
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200270 } else if (!gpio_is_valid(reset_n_io)) {
271 pr_err("invalid reset-n-io GPIO\n");
272 return reset_n_io;
273 }
274 pdata->reset_n_io = reset_n_io;
275
276 if (of_find_property(node, "hci-muxed", NULL))
277 pdata->hci_muxed = 1;
278 else
279 pdata->hci_muxed = 0;
280
281 return 0;
282}
Vincent Cuissarddc14bdef2015-06-11 14:00:19 +0200283EXPORT_SYMBOL_GPL(nfcmrvl_parse_dt);
284
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800285MODULE_AUTHOR("Marvell International Ltd.");
Vincent Cuissardfb101c02015-10-26 10:27:37 +0100286MODULE_DESCRIPTION("Marvell NFC driver");
Amitkumar Karwarf26e30c2014-01-06 12:58:19 -0800287MODULE_LICENSE("GPL v2");