1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * NCI based driver for Samsung S3FWRN5 NFC chip 4 * 5 * Copyright (C) 2015 Samsung Electrnoics 6 * Robert Baldyga <r.baldyga@samsung.com> 7 */ 8 9 #include <linux/module.h> 10 #include <net/nfc/nci_core.h> 11 12 #include "s3fwrn5.h" 13 #include "firmware.h" 14 #include "nci.h" 15 16 #define S3FWRN5_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \ 17 NFC_PROTO_MIFARE_MASK | \ 18 NFC_PROTO_FELICA_MASK | \ 19 NFC_PROTO_ISO14443_MASK | \ 20 NFC_PROTO_ISO14443_B_MASK | \ 21 NFC_PROTO_ISO15693_MASK) 22 23 static int s3fwrn5_firmware_update(struct s3fwrn5_info *info) 24 { 25 bool need_update; 26 int ret; 27 28 s3fwrn5_fw_init(&info->fw_info, "sec_s3fwrn5_firmware.bin"); 29 30 /* Update firmware */ 31 32 s3fwrn5_set_wake(info, false); 33 s3fwrn5_set_mode(info, S3FWRN5_MODE_FW); 34 35 ret = s3fwrn5_fw_setup(&info->fw_info); 36 if (ret < 0) 37 return ret; 38 39 need_update = s3fwrn5_fw_check_version(&info->fw_info, 40 info->ndev->manufact_specific_info); 41 if (!need_update) 42 goto out; 43 44 dev_info(&info->ndev->nfc_dev->dev, "Detected new firmware version\n"); 45 46 ret = s3fwrn5_fw_download(&info->fw_info); 47 if (ret < 0) 48 goto out; 49 50 /* Update RF configuration */ 51 52 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); 53 54 s3fwrn5_set_wake(info, true); 55 ret = s3fwrn5_nci_rf_configure(info, "sec_s3fwrn5_rfreg.bin"); 56 s3fwrn5_set_wake(info, false); 57 58 out: 59 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 60 s3fwrn5_fw_cleanup(&info->fw_info); 61 return ret; 62 } 63 64 static int s3fwrn5_nci_open(struct nci_dev *ndev) 65 { 66 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 67 68 if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_COLD) 69 return -EBUSY; 70 71 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); 72 s3fwrn5_set_wake(info, true); 73 74 return 0; 75 } 76 77 static int s3fwrn5_nci_close(struct nci_dev *ndev) 78 { 79 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 80 81 s3fwrn5_set_wake(info, false); 82 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 83 84 return 0; 85 } 86 87 static int s3fwrn5_nci_send(struct nci_dev *ndev, struct sk_buff *skb) 88 { 89 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 90 int ret; 91 92 mutex_lock(&info->mutex); 93 94 if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_NCI) { 95 mutex_unlock(&info->mutex); 96 return -EINVAL; 97 } 98 99 ret = s3fwrn5_write(info, skb); 100 if (ret < 0) 101 kfree_skb(skb); 102 103 mutex_unlock(&info->mutex); 104 return ret; 105 } 106 107 static int s3fwrn5_nci_post_setup(struct nci_dev *ndev) 108 { 109 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 110 int ret; 111 112 ret = s3fwrn5_firmware_update(info); 113 if (ret < 0) 114 goto out; 115 116 /* NCI core reset */ 117 118 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); 119 s3fwrn5_set_wake(info, true); 120 121 ret = nci_core_reset(info->ndev); 122 if (ret < 0) 123 goto out; 124 125 ret = nci_core_init(info->ndev); 126 127 out: 128 return ret; 129 } 130 131 static struct nci_ops s3fwrn5_nci_ops = { 132 .open = s3fwrn5_nci_open, 133 .close = s3fwrn5_nci_close, 134 .send = s3fwrn5_nci_send, 135 .post_setup = s3fwrn5_nci_post_setup, 136 }; 137 138 int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev, 139 const struct s3fwrn5_phy_ops *phy_ops, unsigned int max_payload) 140 { 141 struct s3fwrn5_info *info; 142 int ret; 143 144 info = devm_kzalloc(pdev, sizeof(*info), GFP_KERNEL); 145 if (!info) 146 return -ENOMEM; 147 148 info->phy_id = phy_id; 149 info->pdev = pdev; 150 info->phy_ops = phy_ops; 151 info->max_payload = max_payload; 152 mutex_init(&info->mutex); 153 154 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 155 156 s3fwrn5_nci_get_prop_ops(&s3fwrn5_nci_ops.prop_ops, 157 &s3fwrn5_nci_ops.n_prop_ops); 158 159 info->ndev = nci_allocate_device(&s3fwrn5_nci_ops, 160 S3FWRN5_NFC_PROTOCOLS, 0, 0); 161 if (!info->ndev) 162 return -ENOMEM; 163 164 nci_set_parent_dev(info->ndev, pdev); 165 nci_set_drvdata(info->ndev, info); 166 167 ret = nci_register_device(info->ndev); 168 if (ret < 0) { 169 nci_free_device(info->ndev); 170 return ret; 171 } 172 173 info->fw_info.ndev = info->ndev; 174 175 *ndev = info->ndev; 176 177 return ret; 178 } 179 EXPORT_SYMBOL(s3fwrn5_probe); 180 181 void s3fwrn5_remove(struct nci_dev *ndev) 182 { 183 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 184 185 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 186 187 nci_unregister_device(ndev); 188 nci_free_device(ndev); 189 } 190 EXPORT_SYMBOL(s3fwrn5_remove); 191 192 int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb, 193 enum s3fwrn5_mode mode) 194 { 195 switch (mode) { 196 case S3FWRN5_MODE_NCI: 197 return nci_recv_frame(ndev, skb); 198 case S3FWRN5_MODE_FW: 199 return s3fwrn5_fw_recv_frame(ndev, skb); 200 default: 201 kfree_skb(skb); 202 return -ENODEV; 203 } 204 } 205 EXPORT_SYMBOL(s3fwrn5_recv_frame); 206 207 MODULE_LICENSE("GPL"); 208 MODULE_DESCRIPTION("Samsung S3FWRN5 NFC driver"); 209 MODULE_AUTHOR("Robert Baldyga <r.baldyga@samsung.com>"); 210