146fe7771SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2dece4585SClément Perrochaud /*
3dece4585SClément Perrochaud * Generic driver for NXP NCI NFC chips
4dece4585SClément Perrochaud *
5dece4585SClément Perrochaud * Copyright (C) 2014 NXP Semiconductors All rights reserved.
6dece4585SClément Perrochaud *
7dece4585SClément Perrochaud * Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
8dece4585SClément Perrochaud *
9dece4585SClément Perrochaud * Derived from PN544 device driver:
10dece4585SClément Perrochaud * Copyright (C) 2012 Intel Corporation. All rights reserved.
11dece4585SClément Perrochaud */
12dece4585SClément Perrochaud
13dece4585SClément Perrochaud #include <linux/delay.h>
14dece4585SClément Perrochaud #include <linux/module.h>
15dece4585SClément Perrochaud #include <linux/nfc.h>
16dece4585SClément Perrochaud
17dece4585SClément Perrochaud #include <net/nfc/nci_core.h>
18dece4585SClément Perrochaud
19dece4585SClément Perrochaud #include "nxp-nci.h"
20dece4585SClément Perrochaud
21dece4585SClément Perrochaud #define NXP_NCI_HDR_LEN 4
22dece4585SClément Perrochaud
23dece4585SClément Perrochaud #define NXP_NCI_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
24dece4585SClément Perrochaud NFC_PROTO_MIFARE_MASK | \
25dece4585SClément Perrochaud NFC_PROTO_FELICA_MASK | \
26dece4585SClément Perrochaud NFC_PROTO_ISO14443_MASK | \
27dece4585SClément Perrochaud NFC_PROTO_ISO14443_B_MASK | \
28dece4585SClément Perrochaud NFC_PROTO_NFC_DEP_MASK)
29dece4585SClément Perrochaud
305dc0f749SMichael Walle #define NXP_NCI_RF_PLL_UNLOCKED_NTF nci_opcode_pack(NCI_GID_RF_MGMT, 0x21)
315dc0f749SMichael Walle #define NXP_NCI_RF_TXLDO_ERROR_NTF nci_opcode_pack(NCI_GID_RF_MGMT, 0x23)
325dc0f749SMichael Walle
nxp_nci_open(struct nci_dev * ndev)33dece4585SClément Perrochaud static int nxp_nci_open(struct nci_dev *ndev)
34dece4585SClément Perrochaud {
35dece4585SClément Perrochaud struct nxp_nci_info *info = nci_get_drvdata(ndev);
36dece4585SClément Perrochaud int r = 0;
37dece4585SClément Perrochaud
38dece4585SClément Perrochaud mutex_lock(&info->info_lock);
39dece4585SClément Perrochaud
40dece4585SClément Perrochaud if (info->mode != NXP_NCI_MODE_COLD) {
41dece4585SClément Perrochaud r = -EBUSY;
42dece4585SClément Perrochaud goto open_exit;
43dece4585SClément Perrochaud }
44dece4585SClément Perrochaud
45dece4585SClément Perrochaud if (info->phy_ops->set_mode)
46dece4585SClément Perrochaud r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_NCI);
47dece4585SClément Perrochaud
48dece4585SClément Perrochaud info->mode = NXP_NCI_MODE_NCI;
49dece4585SClément Perrochaud
50dece4585SClément Perrochaud open_exit:
51dece4585SClément Perrochaud mutex_unlock(&info->info_lock);
52dece4585SClément Perrochaud return r;
53dece4585SClément Perrochaud }
54dece4585SClément Perrochaud
nxp_nci_close(struct nci_dev * ndev)55dece4585SClément Perrochaud static int nxp_nci_close(struct nci_dev *ndev)
56dece4585SClément Perrochaud {
57dece4585SClément Perrochaud struct nxp_nci_info *info = nci_get_drvdata(ndev);
58dece4585SClément Perrochaud int r = 0;
59dece4585SClément Perrochaud
60dece4585SClément Perrochaud mutex_lock(&info->info_lock);
61dece4585SClément Perrochaud
62dece4585SClément Perrochaud if (info->phy_ops->set_mode)
63dece4585SClément Perrochaud r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
64dece4585SClément Perrochaud
65dece4585SClément Perrochaud info->mode = NXP_NCI_MODE_COLD;
66dece4585SClément Perrochaud
67dece4585SClément Perrochaud mutex_unlock(&info->info_lock);
68dece4585SClément Perrochaud return r;
69dece4585SClément Perrochaud }
70dece4585SClément Perrochaud
nxp_nci_send(struct nci_dev * ndev,struct sk_buff * skb)71dece4585SClément Perrochaud static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
72dece4585SClément Perrochaud {
73dece4585SClément Perrochaud struct nxp_nci_info *info = nci_get_drvdata(ndev);
74dece4585SClément Perrochaud int r;
75dece4585SClément Perrochaud
76*614761e1SShang XiaoJing if (!info->phy_ops->write) {
77*614761e1SShang XiaoJing kfree_skb(skb);
7896a19319Swengjianfeng return -EOPNOTSUPP;
79*614761e1SShang XiaoJing }
80dece4585SClément Perrochaud
81*614761e1SShang XiaoJing if (info->mode != NXP_NCI_MODE_NCI) {
82*614761e1SShang XiaoJing kfree_skb(skb);
8396a19319Swengjianfeng return -EINVAL;
84*614761e1SShang XiaoJing }
85dece4585SClément Perrochaud
86dece4585SClément Perrochaud r = info->phy_ops->write(info->phy_id, skb);
877bf1ed6aSShang XiaoJing if (r < 0) {
88dece4585SClément Perrochaud kfree_skb(skb);
89dece4585SClément Perrochaud return r;
90dece4585SClément Perrochaud }
91dece4585SClément Perrochaud
927bf1ed6aSShang XiaoJing consume_skb(skb);
937bf1ed6aSShang XiaoJing return 0;
947bf1ed6aSShang XiaoJing }
957bf1ed6aSShang XiaoJing
nxp_nci_rf_pll_unlocked_ntf(struct nci_dev * ndev,struct sk_buff * skb)965dc0f749SMichael Walle static int nxp_nci_rf_pll_unlocked_ntf(struct nci_dev *ndev,
975dc0f749SMichael Walle struct sk_buff *skb)
985dc0f749SMichael Walle {
995dc0f749SMichael Walle nfc_err(&ndev->nfc_dev->dev,
1005dc0f749SMichael Walle "PLL didn't lock. Missing or unstable clock?\n");
1015dc0f749SMichael Walle
1025dc0f749SMichael Walle return 0;
1035dc0f749SMichael Walle }
1045dc0f749SMichael Walle
nxp_nci_rf_txldo_error_ntf(struct nci_dev * ndev,struct sk_buff * skb)1055dc0f749SMichael Walle static int nxp_nci_rf_txldo_error_ntf(struct nci_dev *ndev,
1065dc0f749SMichael Walle struct sk_buff *skb)
1075dc0f749SMichael Walle {
1085dc0f749SMichael Walle nfc_err(&ndev->nfc_dev->dev,
1095dc0f749SMichael Walle "RF transmitter couldn't start. Bad power and/or configuration?\n");
1105dc0f749SMichael Walle
1115dc0f749SMichael Walle return 0;
1125dc0f749SMichael Walle }
1135dc0f749SMichael Walle
1145dc0f749SMichael Walle static const struct nci_driver_ops nxp_nci_core_ops[] = {
1155dc0f749SMichael Walle {
1165dc0f749SMichael Walle .opcode = NXP_NCI_RF_PLL_UNLOCKED_NTF,
1175dc0f749SMichael Walle .ntf = nxp_nci_rf_pll_unlocked_ntf,
1185dc0f749SMichael Walle },
1195dc0f749SMichael Walle {
1205dc0f749SMichael Walle .opcode = NXP_NCI_RF_TXLDO_ERROR_NTF,
1215dc0f749SMichael Walle .ntf = nxp_nci_rf_txldo_error_ntf,
1225dc0f749SMichael Walle },
1235dc0f749SMichael Walle };
1245dc0f749SMichael Walle
125b9c28286SKrzysztof Kozlowski static const struct nci_ops nxp_nci_ops = {
126dece4585SClément Perrochaud .open = nxp_nci_open,
127dece4585SClément Perrochaud .close = nxp_nci_close,
128dece4585SClément Perrochaud .send = nxp_nci_send,
129dece4585SClément Perrochaud .fw_download = nxp_nci_fw_download,
1305dc0f749SMichael Walle .core_ops = nxp_nci_core_ops,
1315dc0f749SMichael Walle .n_core_ops = ARRAY_SIZE(nxp_nci_core_ops),
132dece4585SClément Perrochaud };
133dece4585SClément Perrochaud
nxp_nci_probe(void * phy_id,struct device * pdev,const struct nxp_nci_phy_ops * phy_ops,unsigned int max_payload,struct nci_dev ** ndev)134dece4585SClément Perrochaud int nxp_nci_probe(void *phy_id, struct device *pdev,
1357cf6d08cSJulia Lawall const struct nxp_nci_phy_ops *phy_ops,
1367cf6d08cSJulia Lawall unsigned int max_payload,
137dece4585SClément Perrochaud struct nci_dev **ndev)
138dece4585SClément Perrochaud {
139dece4585SClément Perrochaud struct nxp_nci_info *info;
140dece4585SClément Perrochaud int r;
141dece4585SClément Perrochaud
142dece4585SClément Perrochaud info = devm_kzalloc(pdev, sizeof(struct nxp_nci_info), GFP_KERNEL);
14396a19319Swengjianfeng if (!info)
14496a19319Swengjianfeng return -ENOMEM;
145dece4585SClément Perrochaud
146dece4585SClément Perrochaud info->phy_id = phy_id;
147dece4585SClément Perrochaud info->pdev = pdev;
148dece4585SClément Perrochaud info->phy_ops = phy_ops;
149dece4585SClément Perrochaud info->max_payload = max_payload;
150dece4585SClément Perrochaud INIT_WORK(&info->fw_info.work, nxp_nci_fw_work);
151dece4585SClément Perrochaud init_completion(&info->fw_info.cmd_completion);
152dece4585SClément Perrochaud mutex_init(&info->info_lock);
153dece4585SClément Perrochaud
154dece4585SClément Perrochaud if (info->phy_ops->set_mode) {
155dece4585SClément Perrochaud r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
156dece4585SClément Perrochaud if (r < 0)
15796a19319Swengjianfeng return r;
158dece4585SClément Perrochaud }
159dece4585SClément Perrochaud
160dece4585SClément Perrochaud info->mode = NXP_NCI_MODE_COLD;
161dece4585SClément Perrochaud
162dece4585SClément Perrochaud info->ndev = nci_allocate_device(&nxp_nci_ops, NXP_NCI_NFC_PROTOCOLS,
163dece4585SClément Perrochaud NXP_NCI_HDR_LEN, 0);
16496a19319Swengjianfeng if (!info->ndev)
16596a19319Swengjianfeng return -ENOMEM;
166dece4585SClément Perrochaud
167dece4585SClément Perrochaud nci_set_parent_dev(info->ndev, pdev);
168dece4585SClément Perrochaud nci_set_drvdata(info->ndev, info);
169dece4585SClément Perrochaud r = nci_register_device(info->ndev);
17096a19319Swengjianfeng if (r < 0) {
17196a19319Swengjianfeng nci_free_device(info->ndev);
17296a19319Swengjianfeng return r;
17396a19319Swengjianfeng }
174dece4585SClément Perrochaud
175dece4585SClément Perrochaud *ndev = info->ndev;
176dece4585SClément Perrochaud return r;
177dece4585SClément Perrochaud }
178dece4585SClément Perrochaud EXPORT_SYMBOL(nxp_nci_probe);
179dece4585SClément Perrochaud
nxp_nci_remove(struct nci_dev * ndev)180dece4585SClément Perrochaud void nxp_nci_remove(struct nci_dev *ndev)
181dece4585SClément Perrochaud {
182dece4585SClément Perrochaud struct nxp_nci_info *info = nci_get_drvdata(ndev);
183dece4585SClément Perrochaud
184dece4585SClément Perrochaud if (info->mode == NXP_NCI_MODE_FW)
185dece4585SClément Perrochaud nxp_nci_fw_work_complete(info, -ESHUTDOWN);
186dece4585SClément Perrochaud cancel_work_sync(&info->fw_info.work);
187dece4585SClément Perrochaud
188dece4585SClément Perrochaud mutex_lock(&info->info_lock);
189dece4585SClément Perrochaud
190dece4585SClément Perrochaud if (info->phy_ops->set_mode)
191dece4585SClément Perrochaud info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
192dece4585SClément Perrochaud
193dece4585SClément Perrochaud nci_unregister_device(ndev);
194dece4585SClément Perrochaud nci_free_device(ndev);
195dece4585SClément Perrochaud
196dece4585SClément Perrochaud mutex_unlock(&info->info_lock);
197dece4585SClément Perrochaud }
198dece4585SClément Perrochaud EXPORT_SYMBOL(nxp_nci_remove);
199dece4585SClément Perrochaud
200dece4585SClément Perrochaud MODULE_LICENSE("GPL");
201dece4585SClément Perrochaud MODULE_DESCRIPTION("NXP NCI NFC driver");
202dece4585SClément Perrochaud MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");
203