1 /* 2 * NCI based driver for Samsung S3FWRN5 NFC chip 3 * 4 * Copyright (C) 2015 Samsung Electrnoics 5 * Robert Baldyga <r.baldyga@samsung.com> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms and conditions of the GNU General Public License, 9 * version 2 or later, as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include <linux/module.h> 21 #include <net/nfc/nci_core.h> 22 23 #include "s3fwrn5.h" 24 #include "firmware.h" 25 #include "nci.h" 26 27 #define S3FWRN5_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \ 28 NFC_PROTO_MIFARE_MASK | \ 29 NFC_PROTO_FELICA_MASK | \ 30 NFC_PROTO_ISO14443_MASK | \ 31 NFC_PROTO_ISO14443_B_MASK | \ 32 NFC_PROTO_ISO15693_MASK) 33 34 static int s3fwrn5_firmware_update(struct s3fwrn5_info *info) 35 { 36 bool need_update; 37 int ret; 38 39 s3fwrn5_fw_init(&info->fw_info, "sec_s3fwrn5_firmware.bin"); 40 41 /* Update firmware */ 42 43 s3fwrn5_set_wake(info, false); 44 s3fwrn5_set_mode(info, S3FWRN5_MODE_FW); 45 46 ret = s3fwrn5_fw_setup(&info->fw_info); 47 if (ret < 0) 48 return ret; 49 50 need_update = s3fwrn5_fw_check_version(&info->fw_info, 51 info->ndev->manufact_specific_info); 52 if (!need_update) 53 goto out; 54 55 dev_info(&info->ndev->nfc_dev->dev, "Detected new firmware version\n"); 56 57 ret = s3fwrn5_fw_download(&info->fw_info); 58 if (ret < 0) 59 goto out; 60 61 /* Update RF configuration */ 62 63 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); 64 65 s3fwrn5_set_wake(info, true); 66 ret = s3fwrn5_nci_rf_configure(info, "sec_s3fwrn5_rfreg.bin"); 67 s3fwrn5_set_wake(info, false); 68 69 out: 70 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 71 s3fwrn5_fw_cleanup(&info->fw_info); 72 return ret; 73 } 74 75 static int s3fwrn5_nci_open(struct nci_dev *ndev) 76 { 77 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 78 79 if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_COLD) 80 return -EBUSY; 81 82 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); 83 s3fwrn5_set_wake(info, true); 84 85 return 0; 86 } 87 88 static int s3fwrn5_nci_close(struct nci_dev *ndev) 89 { 90 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 91 92 s3fwrn5_set_wake(info, false); 93 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 94 95 return 0; 96 } 97 98 static int s3fwrn5_nci_send(struct nci_dev *ndev, struct sk_buff *skb) 99 { 100 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 101 int ret; 102 103 mutex_lock(&info->mutex); 104 105 if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_NCI) { 106 mutex_unlock(&info->mutex); 107 return -EINVAL; 108 } 109 110 ret = s3fwrn5_write(info, skb); 111 if (ret < 0) 112 kfree_skb(skb); 113 114 mutex_unlock(&info->mutex); 115 return ret; 116 } 117 118 static int s3fwrn5_nci_post_setup(struct nci_dev *ndev) 119 { 120 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 121 int ret; 122 123 ret = s3fwrn5_firmware_update(info); 124 if (ret < 0) 125 goto out; 126 127 /* NCI core reset */ 128 129 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); 130 s3fwrn5_set_wake(info, true); 131 132 ret = nci_core_reset(info->ndev); 133 if (ret < 0) 134 goto out; 135 136 ret = nci_core_init(info->ndev); 137 138 out: 139 return ret; 140 } 141 142 static struct nci_ops s3fwrn5_nci_ops = { 143 .open = s3fwrn5_nci_open, 144 .close = s3fwrn5_nci_close, 145 .send = s3fwrn5_nci_send, 146 .post_setup = s3fwrn5_nci_post_setup, 147 }; 148 149 int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev, 150 struct s3fwrn5_phy_ops *phy_ops, unsigned int max_payload) 151 { 152 struct s3fwrn5_info *info; 153 int ret; 154 155 info = devm_kzalloc(pdev, sizeof(*info), GFP_KERNEL); 156 if (!info) 157 return -ENOMEM; 158 159 info->phy_id = phy_id; 160 info->pdev = pdev; 161 info->phy_ops = phy_ops; 162 info->max_payload = max_payload; 163 mutex_init(&info->mutex); 164 165 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 166 167 s3fwrn5_nci_get_prop_ops(&s3fwrn5_nci_ops.prop_ops, 168 &s3fwrn5_nci_ops.n_prop_ops); 169 170 info->ndev = nci_allocate_device(&s3fwrn5_nci_ops, 171 S3FWRN5_NFC_PROTOCOLS, 0, 0); 172 if (!info->ndev) 173 return -ENOMEM; 174 175 nci_set_parent_dev(info->ndev, pdev); 176 nci_set_drvdata(info->ndev, info); 177 178 ret = nci_register_device(info->ndev); 179 if (ret < 0) { 180 nci_free_device(info->ndev); 181 return ret; 182 } 183 184 info->fw_info.ndev = info->ndev; 185 186 *ndev = info->ndev; 187 188 return ret; 189 } 190 EXPORT_SYMBOL(s3fwrn5_probe); 191 192 void s3fwrn5_remove(struct nci_dev *ndev) 193 { 194 struct s3fwrn5_info *info = nci_get_drvdata(ndev); 195 196 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); 197 198 nci_unregister_device(ndev); 199 nci_free_device(ndev); 200 } 201 EXPORT_SYMBOL(s3fwrn5_remove); 202 203 int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb, 204 enum s3fwrn5_mode mode) 205 { 206 switch (mode) { 207 case S3FWRN5_MODE_NCI: 208 return nci_recv_frame(ndev, skb); 209 case S3FWRN5_MODE_FW: 210 return s3fwrn5_fw_recv_frame(ndev, skb); 211 default: 212 return -ENODEV; 213 } 214 } 215 EXPORT_SYMBOL(s3fwrn5_recv_frame); 216 217 MODULE_LICENSE("GPL"); 218 MODULE_DESCRIPTION("Samsung S3FWRN5 NFC driver"); 219 MODULE_AUTHOR("Robert Baldyga <r.baldyga@samsung.com>"); 220