Thomas Gleixner | 46fe777 | 2019-05-31 01:09:57 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Christophe Ricard | 15d1717 | 2015-10-26 07:50:11 +0100 | [diff] [blame] | 2 | /* |
| 3 | * Proprietary commands extension for STMicroelectronics NFC Chip |
| 4 | * |
| 5 | * Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved. |
Christophe Ricard | 15d1717 | 2015-10-26 07:50:11 +0100 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #include <net/genetlink.h> |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/nfc.h> |
| 11 | #include <net/nfc/hci.h> |
| 12 | #include <net/nfc/llc.h> |
| 13 | |
| 14 | #include "st21nfca.h" |
| 15 | |
| 16 | #define ST21NFCA_HCI_DM_GETDATA 0x10 |
| 17 | #define ST21NFCA_HCI_DM_PUTDATA 0x11 |
| 18 | #define ST21NFCA_HCI_DM_LOAD 0x12 |
| 19 | #define ST21NFCA_HCI_DM_GETINFO 0x13 |
| 20 | #define ST21NFCA_HCI_DM_UPDATE_AID 0x20 |
| 21 | #define ST21NFCA_HCI_DM_RESET 0x3e |
| 22 | |
| 23 | #define ST21NFCA_HCI_DM_FIELD_GENERATOR 0x32 |
| 24 | |
| 25 | #define ST21NFCA_FACTORY_MODE_ON 1 |
| 26 | #define ST21NFCA_FACTORY_MODE_OFF 0 |
| 27 | |
| 28 | #define ST21NFCA_EVT_POST_DATA 0x02 |
| 29 | |
| 30 | struct get_param_data { |
| 31 | u8 gate; |
| 32 | u8 data; |
| 33 | } __packed; |
| 34 | |
| 35 | static int st21nfca_factory_mode(struct nfc_dev *dev, void *data, |
| 36 | size_t data_len) |
| 37 | { |
| 38 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 39 | |
| 40 | if (data_len != 1) |
| 41 | return -EINVAL; |
| 42 | |
| 43 | pr_debug("factory mode: %x\n", ((u8 *)data)[0]); |
| 44 | |
| 45 | switch (((u8 *)data)[0]) { |
| 46 | case ST21NFCA_FACTORY_MODE_ON: |
| 47 | test_and_set_bit(ST21NFCA_FACTORY_MODE, &hdev->quirks); |
| 48 | break; |
| 49 | case ST21NFCA_FACTORY_MODE_OFF: |
| 50 | clear_bit(ST21NFCA_FACTORY_MODE, &hdev->quirks); |
| 51 | break; |
| 52 | default: |
| 53 | return -EINVAL; |
| 54 | } |
| 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | static int st21nfca_hci_clear_all_pipes(struct nfc_dev *dev, void *data, |
| 60 | size_t data_len) |
| 61 | { |
| 62 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 63 | |
| 64 | return nfc_hci_disconnect_all_gates(hdev); |
| 65 | } |
| 66 | |
| 67 | static int st21nfca_hci_dm_put_data(struct nfc_dev *dev, void *data, |
| 68 | size_t data_len) |
| 69 | { |
| 70 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 71 | |
| 72 | return nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE, |
| 73 | ST21NFCA_HCI_DM_PUTDATA, data, |
| 74 | data_len, NULL); |
| 75 | } |
| 76 | |
| 77 | static int st21nfca_hci_dm_update_aid(struct nfc_dev *dev, void *data, |
| 78 | size_t data_len) |
| 79 | { |
| 80 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 81 | |
| 82 | return nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE, |
| 83 | ST21NFCA_HCI_DM_UPDATE_AID, data, data_len, NULL); |
| 84 | } |
| 85 | |
| 86 | static int st21nfca_hci_dm_get_info(struct nfc_dev *dev, void *data, |
| 87 | size_t data_len) |
| 88 | { |
| 89 | int r; |
| 90 | struct sk_buff *msg, *skb; |
| 91 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 92 | |
| 93 | r = nfc_hci_send_cmd(hdev, |
| 94 | ST21NFCA_DEVICE_MGNT_GATE, |
| 95 | ST21NFCA_HCI_DM_GETINFO, |
| 96 | data, data_len, &skb); |
| 97 | if (r) |
| 98 | goto exit; |
| 99 | |
| 100 | msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST21NFCA_VENDOR_OUI, |
| 101 | HCI_DM_GET_INFO, skb->len); |
| 102 | if (!msg) { |
| 103 | r = -ENOMEM; |
| 104 | goto free_skb; |
| 105 | } |
| 106 | |
| 107 | if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) { |
| 108 | kfree_skb(msg); |
| 109 | r = -ENOBUFS; |
| 110 | goto free_skb; |
| 111 | } |
| 112 | |
| 113 | r = nfc_vendor_cmd_reply(msg); |
| 114 | |
| 115 | free_skb: |
| 116 | kfree_skb(skb); |
| 117 | exit: |
| 118 | return r; |
| 119 | } |
| 120 | |
| 121 | static int st21nfca_hci_dm_get_data(struct nfc_dev *dev, void *data, |
| 122 | size_t data_len) |
| 123 | { |
| 124 | int r; |
| 125 | struct sk_buff *msg, *skb; |
| 126 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 127 | |
| 128 | r = nfc_hci_send_cmd(hdev, |
| 129 | ST21NFCA_DEVICE_MGNT_GATE, |
| 130 | ST21NFCA_HCI_DM_GETDATA, |
| 131 | data, data_len, &skb); |
| 132 | if (r) |
| 133 | goto exit; |
| 134 | |
| 135 | msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST21NFCA_VENDOR_OUI, |
| 136 | HCI_DM_GET_DATA, skb->len); |
| 137 | if (!msg) { |
| 138 | r = -ENOMEM; |
| 139 | goto free_skb; |
| 140 | } |
| 141 | |
| 142 | if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) { |
| 143 | kfree_skb(msg); |
| 144 | r = -ENOBUFS; |
| 145 | goto free_skb; |
| 146 | } |
| 147 | |
| 148 | r = nfc_vendor_cmd_reply(msg); |
| 149 | |
| 150 | free_skb: |
| 151 | kfree_skb(skb); |
| 152 | exit: |
| 153 | return r; |
| 154 | } |
| 155 | |
| 156 | static int st21nfca_hci_dm_load(struct nfc_dev *dev, void *data, |
| 157 | size_t data_len) |
| 158 | { |
| 159 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 160 | |
| 161 | return nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE, |
| 162 | ST21NFCA_HCI_DM_LOAD, data, data_len, NULL); |
| 163 | } |
| 164 | |
| 165 | static int st21nfca_hci_dm_reset(struct nfc_dev *dev, void *data, |
| 166 | size_t data_len) |
| 167 | { |
| 168 | int r; |
| 169 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 170 | |
| 171 | r = nfc_hci_send_cmd_async(hdev, ST21NFCA_DEVICE_MGNT_GATE, |
| 172 | ST21NFCA_HCI_DM_RESET, data, data_len, NULL, NULL); |
| 173 | if (r < 0) |
| 174 | return r; |
| 175 | |
| 176 | r = nfc_llc_stop(hdev->llc); |
| 177 | if (r < 0) |
| 178 | return r; |
| 179 | |
| 180 | return nfc_llc_start(hdev->llc); |
| 181 | } |
| 182 | |
| 183 | static int st21nfca_hci_get_param(struct nfc_dev *dev, void *data, |
| 184 | size_t data_len) |
| 185 | { |
| 186 | int r; |
| 187 | struct sk_buff *msg, *skb; |
| 188 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 189 | struct get_param_data *param = (struct get_param_data *)data; |
| 190 | |
| 191 | if (data_len < sizeof(struct get_param_data)) |
| 192 | return -EPROTO; |
| 193 | |
| 194 | r = nfc_hci_get_param(hdev, param->gate, param->data, &skb); |
| 195 | if (r) |
| 196 | goto exit; |
| 197 | |
| 198 | msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST21NFCA_VENDOR_OUI, |
| 199 | HCI_GET_PARAM, skb->len); |
| 200 | if (!msg) { |
| 201 | r = -ENOMEM; |
| 202 | goto free_skb; |
| 203 | } |
| 204 | |
| 205 | if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) { |
| 206 | kfree_skb(msg); |
| 207 | r = -ENOBUFS; |
| 208 | goto free_skb; |
| 209 | } |
| 210 | |
| 211 | r = nfc_vendor_cmd_reply(msg); |
| 212 | |
| 213 | free_skb: |
| 214 | kfree_skb(skb); |
| 215 | exit: |
| 216 | return r; |
| 217 | } |
| 218 | |
| 219 | static int st21nfca_hci_dm_field_generator(struct nfc_dev *dev, void *data, |
| 220 | size_t data_len) |
| 221 | { |
| 222 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 223 | |
| 224 | return nfc_hci_send_cmd(hdev, |
| 225 | ST21NFCA_DEVICE_MGNT_GATE, |
| 226 | ST21NFCA_HCI_DM_FIELD_GENERATOR, |
| 227 | data, data_len, NULL); |
| 228 | } |
| 229 | |
| 230 | int st21nfca_hci_loopback_event_received(struct nfc_hci_dev *hdev, u8 event, |
| 231 | struct sk_buff *skb) |
| 232 | { |
| 233 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); |
| 234 | |
| 235 | switch (event) { |
| 236 | case ST21NFCA_EVT_POST_DATA: |
| 237 | info->vendor_info.rx_skb = skb; |
| 238 | break; |
| 239 | default: |
| 240 | nfc_err(&hdev->ndev->dev, "Unexpected event on loopback gate\n"); |
| 241 | } |
| 242 | complete(&info->vendor_info.req_completion); |
| 243 | return 0; |
| 244 | } |
| 245 | EXPORT_SYMBOL(st21nfca_hci_loopback_event_received); |
| 246 | |
| 247 | static int st21nfca_hci_loopback(struct nfc_dev *dev, void *data, |
| 248 | size_t data_len) |
| 249 | { |
| 250 | int r; |
| 251 | struct sk_buff *msg; |
| 252 | struct nfc_hci_dev *hdev = nfc_get_drvdata(dev); |
| 253 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); |
| 254 | |
| 255 | if (data_len <= 0) |
| 256 | return -EPROTO; |
| 257 | |
| 258 | reinit_completion(&info->vendor_info.req_completion); |
| 259 | info->vendor_info.rx_skb = NULL; |
| 260 | |
| 261 | r = nfc_hci_send_event(hdev, NFC_HCI_LOOPBACK_GATE, |
| 262 | ST21NFCA_EVT_POST_DATA, data, data_len); |
| 263 | if (r < 0) { |
| 264 | r = -EPROTO; |
| 265 | goto exit; |
| 266 | } |
| 267 | |
| 268 | wait_for_completion_interruptible(&info->vendor_info.req_completion); |
| 269 | if (!info->vendor_info.rx_skb || |
| 270 | info->vendor_info.rx_skb->len != data_len) { |
| 271 | r = -EPROTO; |
| 272 | goto exit; |
| 273 | } |
| 274 | |
| 275 | msg = nfc_vendor_cmd_alloc_reply_skb(hdev->ndev, |
| 276 | ST21NFCA_VENDOR_OUI, |
| 277 | HCI_LOOPBACK, |
| 278 | info->vendor_info.rx_skb->len); |
| 279 | if (!msg) { |
| 280 | r = -ENOMEM; |
| 281 | goto free_skb; |
| 282 | } |
| 283 | |
| 284 | if (nla_put(msg, NFC_ATTR_VENDOR_DATA, info->vendor_info.rx_skb->len, |
| 285 | info->vendor_info.rx_skb->data)) { |
| 286 | kfree_skb(msg); |
| 287 | r = -ENOBUFS; |
| 288 | goto free_skb; |
| 289 | } |
| 290 | |
| 291 | r = nfc_vendor_cmd_reply(msg); |
| 292 | free_skb: |
| 293 | kfree_skb(info->vendor_info.rx_skb); |
| 294 | exit: |
| 295 | return r; |
| 296 | } |
| 297 | |
Krzysztof Kozlowski | 15944ad | 2021-07-24 23:49:23 +0200 | [diff] [blame] | 298 | static const struct nfc_vendor_cmd st21nfca_vendor_cmds[] = { |
Christophe Ricard | 15d1717 | 2015-10-26 07:50:11 +0100 | [diff] [blame] | 299 | { |
| 300 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 301 | .subcmd = FACTORY_MODE, |
| 302 | .doit = st21nfca_factory_mode, |
| 303 | }, |
| 304 | { |
| 305 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 306 | .subcmd = HCI_CLEAR_ALL_PIPES, |
| 307 | .doit = st21nfca_hci_clear_all_pipes, |
| 308 | }, |
| 309 | { |
| 310 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 311 | .subcmd = HCI_DM_PUT_DATA, |
| 312 | .doit = st21nfca_hci_dm_put_data, |
| 313 | }, |
| 314 | { |
| 315 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 316 | .subcmd = HCI_DM_UPDATE_AID, |
| 317 | .doit = st21nfca_hci_dm_update_aid, |
| 318 | }, |
| 319 | { |
| 320 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 321 | .subcmd = HCI_DM_GET_INFO, |
| 322 | .doit = st21nfca_hci_dm_get_info, |
| 323 | }, |
| 324 | { |
| 325 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 326 | .subcmd = HCI_DM_GET_DATA, |
| 327 | .doit = st21nfca_hci_dm_get_data, |
| 328 | }, |
| 329 | { |
| 330 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 331 | .subcmd = HCI_DM_LOAD, |
| 332 | .doit = st21nfca_hci_dm_load, |
| 333 | }, |
| 334 | { |
| 335 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 336 | .subcmd = HCI_DM_RESET, |
| 337 | .doit = st21nfca_hci_dm_reset, |
| 338 | }, |
| 339 | { |
| 340 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 341 | .subcmd = HCI_GET_PARAM, |
| 342 | .doit = st21nfca_hci_get_param, |
| 343 | }, |
| 344 | { |
| 345 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 346 | .subcmd = HCI_DM_FIELD_GENERATOR, |
| 347 | .doit = st21nfca_hci_dm_field_generator, |
| 348 | }, |
| 349 | { |
| 350 | .vendor_id = ST21NFCA_VENDOR_OUI, |
| 351 | .subcmd = HCI_LOOPBACK, |
| 352 | .doit = st21nfca_hci_loopback, |
| 353 | }, |
| 354 | }; |
| 355 | |
| 356 | int st21nfca_vendor_cmds_init(struct nfc_hci_dev *hdev) |
| 357 | { |
| 358 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); |
| 359 | |
| 360 | init_completion(&info->vendor_info.req_completion); |
| 361 | return nfc_set_vendor_cmds(hdev->ndev, st21nfca_vendor_cmds, |
| 362 | sizeof(st21nfca_vendor_cmds)); |
| 363 | } |
| 364 | EXPORT_SYMBOL(st21nfca_vendor_cmds_init); |