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_init(struct s3fwrn5_info *info) 24 { 25 struct s3fwrn5_fw_info *fw_info = &info->fw_info; 26 int ret; 27 28 s3fwrn5_fw_init(fw_info, "sec_s3fwrn5_firmware.bin"); 29 30 /* Get firmware data */ 31 ret = s3fwrn5_fw_request_firmware(fw_info); 32 if (ret < 0) 33 dev_err(&fw_info->ndev->nfc_dev->dev, 34 "Failed to get fw file, ret=%02x\n", ret); 35 return ret; 36 } 37 38 static int s3fwrn5_firmware_update(struct s3fwrn5_info *info) 39 { 40 bool need_update; 41 int ret; 42 43 /* Update firmware */ 44 45 s3fwrn5_set_wake(info, false); 46 s3fwrn5_set_mode(info, S3FWRN5_MODE_FW); 47 48 ret = s3fwrn5_fw_setup(&info->fw_info); 49 if (ret < 0) 50 return ret; 51 52 need_update = s3fwrn5_fw_check_version(&info->fw_info, 53 info->ndev->manufact_specific_info); 54 if (!need_update) 55 goto out; 56 57 dev_info(&info->ndev->nfc_dev->dev, "Detected new firmware version\n"); 58 59 ret = s3fwrn5_fw_download(&info->fw_info); 60 if (ret < 0) 61 goto out; 62 63 /* Update RF configuration */ 64 65 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); 66 67 s3fwrn5_set_wake(info, true); 68 ret = s3fwrn5_nci_rf_configure(info, "sec_s3fwrn5_rfreg.bin"); 69 s3fwrn5_set_wake(info, false); 70 71 out: 72 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 73 s3fwrn5_fw_cleanup(&info->fw_info); 74 return ret; 75 } 76 77 static int s3fwrn5_nci_open(struct nci_dev *ndev) 78 { 79 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 80 81 if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_COLD) 82 return -EBUSY; 83 84 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); 85 s3fwrn5_set_wake(info, true); 86 87 return 0; 88 } 89 90 static int s3fwrn5_nci_close(struct nci_dev *ndev) 91 { 92 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 93 94 s3fwrn5_set_wake(info, false); 95 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 96 97 return 0; 98 } 99 100 static int s3fwrn5_nci_send(struct nci_dev *ndev, struct sk_buff *skb) 101 { 102 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 103 int ret; 104 105 mutex_lock(&info->mutex); 106 107 if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_NCI) { 108 mutex_unlock(&info->mutex); 109 return -EINVAL; 110 } 111 112 ret = s3fwrn5_write(info, skb); 113 if (ret < 0) 114 kfree_skb(skb); 115 116 mutex_unlock(&info->mutex); 117 return ret; 118 } 119 120 static int s3fwrn5_nci_post_setup(struct nci_dev *ndev) 121 { 122 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 123 int ret; 124 125 if (s3fwrn5_firmware_init(info)) { 126 //skip bootloader mode 127 return 0; 128 } 129 130 ret = s3fwrn5_firmware_update(info); 131 if (ret < 0) 132 return ret; 133 134 /* NCI core reset */ 135 136 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); 137 s3fwrn5_set_wake(info, true); 138 139 ret = nci_core_reset(info->ndev); 140 if (ret < 0) 141 return ret; 142 143 return nci_core_init(info->ndev); 144 } 145 146 static const struct nci_ops s3fwrn5_nci_ops = { 147 .open = s3fwrn5_nci_open, 148 .close = s3fwrn5_nci_close, 149 .send = s3fwrn5_nci_send, 150 .post_setup = s3fwrn5_nci_post_setup, 151 .prop_ops = s3fwrn5_nci_prop_ops, 152 .n_prop_ops = ARRAY_SIZE(s3fwrn5_nci_prop_ops), 153 }; 154 155 int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev, 156 const struct s3fwrn5_phy_ops *phy_ops) 157 { 158 struct s3fwrn5_info *info; 159 int ret; 160 161 info = devm_kzalloc(pdev, sizeof(*info), GFP_KERNEL); 162 if (!info) 163 return -ENOMEM; 164 165 info->phy_id = phy_id; 166 info->pdev = pdev; 167 info->phy_ops = phy_ops; 168 mutex_init(&info->mutex); 169 170 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 171 172 info->ndev = nci_allocate_device(&s3fwrn5_nci_ops, 173 S3FWRN5_NFC_PROTOCOLS, 0, 0); 174 if (!info->ndev) 175 return -ENOMEM; 176 177 nci_set_parent_dev(info->ndev, pdev); 178 nci_set_drvdata(info->ndev, info); 179 180 ret = nci_register_device(info->ndev); 181 if (ret < 0) { 182 nci_free_device(info->ndev); 183 return ret; 184 } 185 186 info->fw_info.ndev = info->ndev; 187 188 *ndev = info->ndev; 189 190 return ret; 191 } 192 EXPORT_SYMBOL(s3fwrn5_probe); 193 194 void s3fwrn5_remove(struct nci_dev *ndev) 195 { 196 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 197 198 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 199 200 nci_unregister_device(ndev); 201 nci_free_device(ndev); 202 } 203 EXPORT_SYMBOL(s3fwrn5_remove); 204 205 int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb, 206 enum s3fwrn5_mode mode) 207 { 208 switch (mode) { 209 case S3FWRN5_MODE_NCI: 210 return nci_recv_frame(ndev, skb); 211 case S3FWRN5_MODE_FW: 212 return s3fwrn5_fw_recv_frame(ndev, skb); 213 default: 214 kfree_skb(skb); 215 return -ENODEV; 216 } 217 } 218 EXPORT_SYMBOL(s3fwrn5_recv_frame); 219 220 MODULE_LICENSE("GPL"); 221 MODULE_DESCRIPTION("Samsung S3FWRN5 NFC driver"); 222 MODULE_AUTHOR("Robert Baldyga <r.baldyga@samsung.com>"); 223