Tatenda Chipeperekwa | 6593536 | 2017-06-07 13:44:11 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #define pr_fmt(fmt) "[hdcp-lib] %s: " fmt, __func__ |
| 14 | |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/fs.h> |
| 20 | #include <linux/file.h> |
| 21 | #include <linux/uaccess.h> |
| 22 | #include <linux/cdev.h> |
| 23 | #include <linux/sched.h> |
| 24 | #include <linux/list.h> |
| 25 | #include <linux/mutex.h> |
| 26 | #include <linux/io.h> |
| 27 | #include <linux/ion.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/device.h> |
| 30 | #include <linux/sched.h> |
| 31 | #include <linux/delay.h> |
| 32 | #include <linux/completion.h> |
| 33 | #include <linux/errno.h> |
| 34 | #include <linux/hdcp_qseecom.h> |
| 35 | #include <linux/kthread.h> |
| 36 | #include <linux/of.h> |
| 37 | #include <video/msm_hdmi_hdcp_mgr.h> |
| 38 | |
| 39 | #include "qseecom_kernel.h" |
| 40 | |
| 41 | #define CLASS_NAME "hdcp" |
| 42 | #define DRIVER_NAME "msm_hdcp" |
| 43 | #define TZAPP_NAME "hdcp2p2" |
| 44 | #define HDCP1_APP_NAME "hdcp1" |
| 45 | #define QSEECOM_SBUFF_SIZE 0x1000 |
| 46 | |
| 47 | #define MAX_TX_MESSAGE_SIZE 129 |
| 48 | #define MAX_RX_MESSAGE_SIZE 534 |
| 49 | #define MAX_TOPOLOGY_ELEMS 32 |
| 50 | #define HDCP1_AKSV_SIZE 8 |
| 51 | |
| 52 | /* parameters related to LC_Init message */ |
| 53 | #define MESSAGE_ID_SIZE 1 |
| 54 | #define LC_INIT_MESSAGE_SIZE (MESSAGE_ID_SIZE+BITS_64_IN_BYTES) |
| 55 | |
| 56 | /* parameters related to SKE_Send_EKS message */ |
| 57 | #define SKE_SEND_EKS_MESSAGE_SIZE \ |
| 58 | (MESSAGE_ID_SIZE+BITS_128_IN_BYTES+BITS_64_IN_BYTES) |
| 59 | |
| 60 | /* all message IDs */ |
| 61 | #define INVALID_MESSAGE_ID 0 |
| 62 | #define AKE_INIT_MESSAGE_ID 2 |
| 63 | #define AKE_SEND_CERT_MESSAGE_ID 3 |
| 64 | #define AKE_NO_STORED_KM_MESSAGE_ID 4 |
| 65 | #define AKE_STORED_KM_MESSAGE_ID 5 |
| 66 | #define AKE_SEND_H_PRIME_MESSAGE_ID 7 |
| 67 | #define AKE_SEND_PAIRING_INFO_MESSAGE_ID 8 |
| 68 | #define LC_INIT_MESSAGE_ID 9 |
| 69 | #define LC_SEND_L_PRIME_MESSAGE_ID 10 |
| 70 | #define SKE_SEND_EKS_MESSAGE_ID 11 |
| 71 | #define REPEATER_AUTH_SEND_RECEIVERID_LIST_MESSAGE_ID 12 |
| 72 | #define REPEATER_AUTH_SEND_ACK_MESSAGE_ID 15 |
| 73 | #define REPEATER_AUTH_STREAM_MANAGE_MESSAGE_ID 16 |
| 74 | #define REPEATER_AUTH_STREAM_READY_MESSAGE_ID 17 |
| 75 | #define SKE_SEND_TYPE_ID 18 |
| 76 | #define HDCP2P2_MAX_MESSAGES 19 |
| 77 | |
| 78 | #define HDCP1_SET_KEY_MESSAGE_ID 202 |
| 79 | #define HDCP1_SET_ENC_MESSAGE_ID 205 |
| 80 | |
| 81 | #define BITS_40_IN_BYTES 5 |
| 82 | #define BITS_64_IN_BYTES 8 |
| 83 | #define BITS_128_IN_BYTES 16 |
| 84 | #define RXCAPS_SIZE 3 |
| 85 | #define RXINFO_SIZE 2 |
| 86 | #define SEQ_NUM_V_SIZE 3 |
| 87 | |
| 88 | #define RCVR_ID_SIZE BITS_40_IN_BYTES |
| 89 | #define MAX_RCVR_IDS_ALLOWED_IN_LIST 31 |
| 90 | #define MAX_RCVR_ID_LIST_SIZE \ |
| 91 | (RCVR_ID_SIZE * MAX_RCVR_IDS_ALLOWED_IN_LIST) |
| 92 | /* |
| 93 | * Minimum wait as per standard is 200 ms. Keep it 220 ms |
| 94 | * to be on safe side. |
| 95 | */ |
| 96 | #define SLEEP_SET_HW_KEY_MS 220 |
| 97 | |
| 98 | /* hdcp command status */ |
| 99 | #define HDCP_SUCCESS 0 |
| 100 | |
| 101 | /* flags set by tz in response message */ |
| 102 | #define HDCP_TXMTR_SUBSTATE_WAITING_FOR_RECIEVERID_LIST 1 |
| 103 | |
| 104 | #define HDCP_TXMTR_SERVICE_ID 0x0001000 |
| 105 | #define SERVICE_CREATE_CMD(x) (HDCP_TXMTR_SERVICE_ID | x) |
| 106 | |
| 107 | #define HDCP_TXMTR_INIT SERVICE_CREATE_CMD(1) |
| 108 | #define HDCP_TXMTR_DEINIT SERVICE_CREATE_CMD(2) |
| 109 | #define HDCP_TXMTR_PROCESS_RECEIVED_MESSAGE SERVICE_CREATE_CMD(3) |
| 110 | #define HDCP_TXMTR_SEND_MESSAGE_TIMEOUT SERVICE_CREATE_CMD(4) |
| 111 | #define HDCP_TXMTR_SET_HW_KEY SERVICE_CREATE_CMD(5) |
| 112 | #define HDCP_TXMTR_QUERY_STREAM_TYPE SERVICE_CREATE_CMD(6) |
| 113 | #define HDCP_LIB_INIT SERVICE_CREATE_CMD(11) |
| 114 | #define HDCP_LIB_DEINIT SERVICE_CREATE_CMD(12) |
| 115 | #define HDCP_TXMTR_GET_VERSION SERVICE_CREATE_CMD(14) |
| 116 | #define HDCP_TXMTR_VERIFY_KEY SERVICE_CREATE_CMD(15) |
| 117 | #define HDCP_SESSION_INIT SERVICE_CREATE_CMD(16) |
| 118 | #define HDCP_SESSION_DEINIT SERVICE_CREATE_CMD(17) |
| 119 | #define HDCP_TXMTR_START_AUTHENTICATE SERVICE_CREATE_CMD(18) |
| 120 | |
| 121 | #define HCDP_TXMTR_GET_MAJOR_VERSION(v) (((v) >> 16) & 0xFF) |
| 122 | #define HCDP_TXMTR_GET_MINOR_VERSION(v) (((v) >> 8) & 0xFF) |
| 123 | #define HCDP_TXMTR_GET_PATCH_VERSION(v) ((v) & 0xFF) |
| 124 | |
| 125 | #define HDCP_CLIENT_MAJOR_VERSION 2 |
| 126 | #define HDCP_CLIENT_MINOR_VERSION 1 |
| 127 | #define HDCP_CLIENT_PATCH_VERSION 0 |
| 128 | #define HDCP_CLIENT_MAKE_VERSION(maj, min, patch) \ |
| 129 | ((((maj) & 0xFF) << 16) | (((min) & 0xFF) << 8) | ((patch) & 0xFF)) |
| 130 | |
| 131 | #define REAUTH_REQ BIT(3) |
| 132 | #define LINK_INTEGRITY_FAILURE BIT(4) |
| 133 | |
| 134 | #define HDCP_LIB_EXECUTE(x) {\ |
| 135 | kthread_queue_work(&handle->worker, &handle->wk_##x);\ |
| 136 | } |
| 137 | |
| 138 | static const struct hdcp_msg_data hdcp_msg_lookup[HDCP2P2_MAX_MESSAGES] = { |
| 139 | [AKE_INIT_MESSAGE_ID] = { 2, |
| 140 | { {"rtx", 0x69000, 8}, {"TxCaps", 0x69008, 3} }, |
| 141 | 0 }, |
| 142 | [AKE_SEND_CERT_MESSAGE_ID] = { 3, |
| 143 | { {"cert-rx", 0x6900B, 522}, {"rrx", 0x69215, 8}, |
| 144 | {"RxCaps", 0x6921D, 3} }, |
| 145 | 0 }, |
| 146 | [AKE_NO_STORED_KM_MESSAGE_ID] = { 1, |
| 147 | { {"Ekpub_km", 0x69220, 128} }, |
| 148 | 0 }, |
| 149 | [AKE_STORED_KM_MESSAGE_ID] = { 2, |
| 150 | { {"Ekh_km", 0x692A0, 16}, {"m", 0x692B0, 16} }, |
| 151 | 0 }, |
| 152 | [AKE_SEND_H_PRIME_MESSAGE_ID] = { 1, |
| 153 | { {"H'", 0x692C0, 32} }, |
| 154 | (1 << 1) }, |
| 155 | [AKE_SEND_PAIRING_INFO_MESSAGE_ID] = { 1, |
| 156 | { {"Ekh_km", 0x692E0, 16} }, |
| 157 | (1 << 2) }, |
| 158 | [LC_INIT_MESSAGE_ID] = { 1, |
| 159 | { {"rn", 0x692F0, 8} }, |
| 160 | 0 }, |
| 161 | [LC_SEND_L_PRIME_MESSAGE_ID] = { 1, |
| 162 | { {"L'", 0x692F8, 32} }, |
| 163 | 0 }, |
| 164 | [SKE_SEND_EKS_MESSAGE_ID] = { 2, |
| 165 | { {"Edkey_ks", 0x69318, 16}, {"riv", 0x69328, 8} }, |
| 166 | 0 }, |
| 167 | [SKE_SEND_TYPE_ID] = { 1, |
| 168 | { {"type", 0x69494, 1} }, |
| 169 | 0 }, |
| 170 | [REPEATER_AUTH_SEND_RECEIVERID_LIST_MESSAGE_ID] = { 4, |
| 171 | { {"RxInfo", 0x69330, 2}, {"seq_num_V", 0x69332, 3}, |
| 172 | {"V'", 0x69335, 16}, {"ridlist", 0x69345, 155} }, |
| 173 | (1 << 0) }, |
| 174 | [REPEATER_AUTH_SEND_ACK_MESSAGE_ID] = { 1, |
| 175 | { {"V", 0x693E0, 16} }, |
| 176 | 0 }, |
| 177 | [REPEATER_AUTH_STREAM_MANAGE_MESSAGE_ID] = { 3, |
| 178 | { {"seq_num_M", 0x693F0, 3}, {"k", 0x693F3, 2}, |
| 179 | {"streamID_Type", 0x693F5, 126} }, |
| 180 | 0 }, |
| 181 | [REPEATER_AUTH_STREAM_READY_MESSAGE_ID] = { 1, |
| 182 | { {"M'", 0x69473, 32} }, |
| 183 | 0 } |
| 184 | }; |
| 185 | |
| 186 | enum hdcp_state { |
| 187 | HDCP_STATE_INIT = 0x00, |
| 188 | HDCP_STATE_APP_LOADED = 0x01, |
| 189 | HDCP_STATE_SESSION_INIT = 0x02, |
| 190 | HDCP_STATE_TXMTR_INIT = 0x04, |
| 191 | HDCP_STATE_AUTHENTICATED = 0x08, |
| 192 | HDCP_STATE_ERROR = 0x10 |
| 193 | }; |
| 194 | |
| 195 | enum hdcp_element { |
| 196 | HDCP_TYPE_UNKNOWN, |
| 197 | HDCP_TYPE_RECEIVER, |
| 198 | HDCP_TYPE_REPEATER, |
| 199 | }; |
| 200 | |
| 201 | enum hdcp_version { |
| 202 | HDCP_VERSION_UNKNOWN, |
| 203 | HDCP_VERSION_2_2, |
| 204 | HDCP_VERSION_1_4 |
| 205 | }; |
| 206 | |
| 207 | struct receiver_info { |
| 208 | unsigned char rcvrInfo[RCVR_ID_SIZE]; |
| 209 | enum hdcp_element elem_type; |
| 210 | enum hdcp_version hdcp_version; |
| 211 | }; |
| 212 | |
| 213 | struct topology_info { |
| 214 | unsigned int nNumRcvrs; |
| 215 | struct receiver_info rcvinfo[MAX_TOPOLOGY_ELEMS]; |
| 216 | }; |
| 217 | |
| 218 | struct __attribute__ ((__packed__)) hdcp1_key_set_req { |
| 219 | uint32_t commandid; |
| 220 | }; |
| 221 | |
| 222 | struct __attribute__ ((__packed__)) hdcp1_key_set_rsp { |
| 223 | uint32_t commandid; |
| 224 | uint32_t ret; |
| 225 | uint8_t ksv[HDCP1_AKSV_SIZE]; |
| 226 | }; |
| 227 | |
| 228 | struct __attribute__ ((__packed__)) hdcp_version_req { |
| 229 | uint32_t commandid; |
| 230 | }; |
| 231 | |
| 232 | struct __attribute__ ((__packed__)) hdcp_version_rsp { |
| 233 | uint32_t commandid; |
| 234 | uint32_t commandId; |
| 235 | uint32_t appversion; |
| 236 | }; |
| 237 | |
| 238 | struct __attribute__ ((__packed__)) hdcp_verify_key_req { |
| 239 | uint32_t commandid; |
| 240 | }; |
| 241 | |
| 242 | struct __attribute__ ((__packed__)) hdcp_verify_key_rsp { |
| 243 | uint32_t status; |
| 244 | uint32_t commandId; |
| 245 | }; |
| 246 | |
| 247 | struct __attribute__ ((__packed__)) hdcp_lib_init_req_v1 { |
| 248 | uint32_t commandid; |
| 249 | }; |
| 250 | |
| 251 | struct __attribute__ ((__packed__)) hdcp_lib_init_rsp_v1 { |
| 252 | uint32_t status; |
| 253 | uint32_t commandid; |
| 254 | uint32_t ctxhandle; |
| 255 | uint32_t timeout; |
| 256 | uint32_t msglen; |
| 257 | uint8_t message[MAX_TX_MESSAGE_SIZE]; |
| 258 | }; |
| 259 | |
| 260 | struct __attribute__ ((__packed__)) hdcp_lib_init_req { |
| 261 | uint32_t commandid; |
| 262 | uint32_t clientversion; |
| 263 | }; |
| 264 | |
| 265 | struct __attribute__ ((__packed__)) hdcp_lib_init_rsp { |
| 266 | uint32_t status; |
| 267 | uint32_t commandid; |
| 268 | uint32_t appversion; |
| 269 | }; |
| 270 | |
| 271 | struct __attribute__ ((__packed__)) hdcp_lib_deinit_req { |
| 272 | uint32_t commandid; |
| 273 | }; |
| 274 | |
| 275 | struct __attribute__ ((__packed__)) hdcp_lib_deinit_rsp { |
| 276 | uint32_t status; |
| 277 | uint32_t commandid; |
| 278 | }; |
| 279 | |
| 280 | struct __attribute__ ((__packed__)) hdcp_lib_session_init_req { |
| 281 | uint32_t commandid; |
| 282 | uint32_t deviceid; |
| 283 | }; |
| 284 | |
| 285 | struct __attribute__ ((__packed__)) hdcp_lib_session_init_rsp { |
| 286 | uint32_t status; |
| 287 | uint32_t commandid; |
| 288 | uint32_t sessionid; |
| 289 | }; |
| 290 | |
| 291 | struct __attribute__ ((__packed__)) hdcp_lib_session_deinit_req { |
| 292 | uint32_t commandid; |
| 293 | uint32_t sessionid; |
| 294 | }; |
| 295 | |
| 296 | struct __attribute__ ((__packed__)) hdcp_lib_session_deinit_rsp { |
| 297 | uint32_t status; |
| 298 | uint32_t commandid; |
| 299 | }; |
| 300 | |
| 301 | struct __attribute__ ((__packed__)) hdcp_tx_init_req_v1 { |
| 302 | uint32_t commandid; |
| 303 | }; |
| 304 | |
| 305 | struct __attribute__ ((__packed__)) hdcp_tx_init_rsp_v1 { |
| 306 | uint32_t status; |
| 307 | uint32_t commandid; |
| 308 | uint32_t ctxhandle; |
| 309 | uint32_t timeout; |
| 310 | uint32_t msglen; |
| 311 | uint8_t message[MAX_TX_MESSAGE_SIZE]; |
| 312 | }; |
| 313 | |
| 314 | struct __attribute__ ((__packed__)) hdcp_tx_init_req { |
| 315 | uint32_t commandid; |
| 316 | uint32_t sessionid; |
| 317 | }; |
| 318 | |
| 319 | struct __attribute__ ((__packed__)) hdcp_tx_init_rsp { |
| 320 | uint32_t status; |
| 321 | uint32_t commandid; |
| 322 | uint32_t ctxhandle; |
| 323 | }; |
| 324 | |
| 325 | struct __attribute__ ((__packed__)) hdcp_deinit_req { |
| 326 | uint32_t commandid; |
| 327 | uint32_t ctxhandle; |
| 328 | }; |
| 329 | |
| 330 | struct __attribute__ ((__packed__)) hdcp_deinit_rsp { |
| 331 | uint32_t status; |
| 332 | uint32_t commandid; |
| 333 | }; |
| 334 | |
| 335 | struct __attribute__ ((__packed__)) hdcp_rcvd_msg_req { |
| 336 | uint32_t commandid; |
| 337 | uint32_t ctxhandle; |
| 338 | uint32_t msglen; |
| 339 | uint8_t msg[MAX_RX_MESSAGE_SIZE]; |
| 340 | }; |
| 341 | |
| 342 | struct __attribute__ ((__packed__)) hdcp_rcvd_msg_rsp { |
| 343 | uint32_t status; |
| 344 | uint32_t commandid; |
| 345 | uint32_t state; |
| 346 | uint32_t timeout; |
| 347 | uint32_t flag; |
| 348 | uint32_t msglen; |
| 349 | uint8_t msg[MAX_TX_MESSAGE_SIZE]; |
| 350 | }; |
| 351 | |
| 352 | struct __attribute__ ((__packed__)) hdcp_set_hw_key_req { |
| 353 | uint32_t commandid; |
| 354 | uint32_t ctxhandle; |
| 355 | }; |
| 356 | |
| 357 | struct __attribute__ ((__packed__)) hdcp_set_hw_key_rsp { |
| 358 | uint32_t status; |
| 359 | uint32_t commandid; |
| 360 | }; |
| 361 | |
| 362 | struct __attribute__ ((__packed__)) hdcp_send_timeout_req { |
| 363 | uint32_t commandid; |
| 364 | uint32_t ctxhandle; |
| 365 | }; |
| 366 | |
| 367 | struct __attribute__ ((__packed__)) hdcp_send_timeout_rsp { |
| 368 | uint32_t status; |
| 369 | uint32_t commandid; |
| 370 | uint32_t timeout; |
| 371 | uint32_t msglen; |
| 372 | uint8_t message[MAX_TX_MESSAGE_SIZE]; |
| 373 | }; |
| 374 | |
| 375 | struct __attribute__ ((__packed__)) hdcp_query_stream_type_req { |
| 376 | uint32_t commandid; |
| 377 | uint32_t ctxhandle; |
| 378 | }; |
| 379 | |
| 380 | struct __attribute__ ((__packed__)) hdcp_query_stream_type_rsp { |
| 381 | uint32_t status; |
| 382 | uint32_t commandid; |
| 383 | uint32_t timeout; |
| 384 | uint32_t msglen; |
| 385 | uint8_t msg[MAX_TX_MESSAGE_SIZE]; |
| 386 | }; |
| 387 | |
| 388 | struct __attribute__ ((__packed__)) hdcp_set_stream_type_req { |
| 389 | uint32_t commandid; |
| 390 | uint32_t ctxhandle; |
| 391 | uint8_t streamtype; |
| 392 | }; |
| 393 | |
| 394 | struct __attribute__ ((__packed__)) hdcp_set_stream_type_rsp { |
| 395 | uint32_t status; |
| 396 | uint32_t commandid; |
| 397 | uint32_t timeout; |
| 398 | uint32_t msglen; |
| 399 | uint8_t message[MAX_TX_MESSAGE_SIZE]; |
| 400 | }; |
| 401 | |
| 402 | struct __attribute__ ((__packed__)) hdcp_update_srm_req { |
| 403 | uint32_t commandid; |
| 404 | uint32_t ctxhandle; |
| 405 | uint32_t srmoffset; |
| 406 | uint32_t srmlength; |
| 407 | }; |
| 408 | |
| 409 | struct __attribute__ ((__packed__)) hdcp_update_srm_rsp { |
| 410 | uint32_t status; |
| 411 | uint32_t commandid; |
| 412 | }; |
| 413 | |
| 414 | struct __attribute__ ((__packed__)) hdcp_get_topology_req { |
| 415 | uint32_t commandid; |
| 416 | uint32_t ctxhandle; |
| 417 | }; |
| 418 | |
| 419 | struct __attribute__ ((__packed__)) hdcp_get_topology_rsp { |
| 420 | uint32_t status; |
| 421 | uint32_t commandid; |
| 422 | struct topology_info topologyinfo; |
| 423 | }; |
| 424 | |
| 425 | struct __attribute__ ((__packed__)) rxvr_info_struct { |
| 426 | uint8_t rcvrCert[522]; |
| 427 | uint8_t rrx[BITS_64_IN_BYTES]; |
| 428 | uint8_t rxcaps[RXCAPS_SIZE]; |
| 429 | bool repeater; |
| 430 | }; |
| 431 | |
| 432 | struct __attribute__ ((__packed__)) repeater_info_struct { |
| 433 | uint8_t RxInfo[RXINFO_SIZE]; |
| 434 | uint8_t seq_num_V[SEQ_NUM_V_SIZE]; |
| 435 | bool seq_num_V_Rollover_flag; |
| 436 | uint8_t ReceiverIDList[MAX_RCVR_ID_LIST_SIZE]; |
| 437 | uint32_t ReceiverIDListLen; |
| 438 | }; |
| 439 | |
| 440 | struct __attribute__ ((__packed__)) hdcp1_set_enc_req { |
| 441 | uint32_t commandid; |
| 442 | uint32_t enable; |
| 443 | }; |
| 444 | |
| 445 | struct __attribute__ ((__packed__)) hdcp1_set_enc_rsp { |
| 446 | uint32_t commandid; |
| 447 | uint32_t ret; |
| 448 | }; |
| 449 | |
| 450 | struct __attribute__ ((__packed__)) hdcp_start_auth_req { |
| 451 | uint32_t commandid; |
| 452 | uint32_t ctxHandle; |
| 453 | }; |
| 454 | |
| 455 | struct __attribute__ ((__packed__)) hdcp_start_auth_rsp { |
| 456 | uint32_t status; |
| 457 | uint32_t commandid; |
| 458 | uint32_t ctxhandle; |
| 459 | uint32_t timeout; |
| 460 | uint32_t msglen; |
| 461 | uint8_t message[MAX_TX_MESSAGE_SIZE]; |
| 462 | }; |
| 463 | |
| 464 | struct hdcp_lib_handle { |
| 465 | unsigned char *listener_buf; |
| 466 | uint32_t msglen; |
| 467 | uint32_t tz_ctxhandle; |
| 468 | uint32_t hdcp_timeout; |
| 469 | uint32_t timeout_left; |
| 470 | uint32_t wait_timeout; |
| 471 | bool no_stored_km_flag; |
| 472 | bool feature_supported; |
| 473 | bool authenticated; |
| 474 | void *client_ctx; |
| 475 | struct hdcp_client_ops *client_ops; |
| 476 | struct mutex msg_lock; |
| 477 | struct mutex wakeup_mutex; |
| 478 | enum hdcp_state hdcp_state; |
| 479 | enum hdcp_lib_wakeup_cmd wakeup_cmd; |
| 480 | bool repeater_flag; |
| 481 | bool update_stream; |
| 482 | struct qseecom_handle *qseecom_handle; |
| 483 | int last_msg_sent; |
| 484 | int last_msg; |
| 485 | char *last_msg_recvd_buf; |
| 486 | uint32_t last_msg_recvd_len; |
| 487 | atomic_t hdcp_off; |
| 488 | uint32_t session_id; |
| 489 | enum hdcp_device_type device_type; |
| 490 | |
| 491 | struct task_struct *thread; |
| 492 | struct completion poll_wait; |
| 493 | |
| 494 | struct kthread_worker worker; |
| 495 | struct kthread_work wk_init; |
| 496 | struct kthread_work wk_msg_sent; |
| 497 | struct kthread_work wk_msg_recvd; |
| 498 | struct kthread_work wk_timeout; |
| 499 | struct kthread_work wk_clean; |
| 500 | struct kthread_work wk_wait; |
| 501 | struct kthread_work wk_stream; |
| 502 | |
| 503 | int (*hdcp_app_init)(struct hdcp_lib_handle *handle); |
| 504 | int (*hdcp_txmtr_init)(struct hdcp_lib_handle *handle); |
| 505 | }; |
| 506 | |
| 507 | struct hdcp_lib_message_map { |
| 508 | int msg_id; |
| 509 | const char *msg_name; |
| 510 | }; |
| 511 | |
| 512 | struct msm_hdcp_mgr { |
| 513 | struct platform_device *pdev; |
| 514 | dev_t dev_num; |
| 515 | struct cdev cdev; |
| 516 | struct class *class; |
| 517 | struct device *device; |
| 518 | struct HDCP_V2V1_MSG_TOPOLOGY cached_tp; |
| 519 | u32 tp_msgid; |
| 520 | void *client_ctx; |
| 521 | struct hdcp_lib_handle *handle; |
| 522 | }; |
| 523 | |
| 524 | static struct msm_hdcp_mgr *hdcp_drv_mgr; |
| 525 | static struct hdcp_lib_handle *drv_client_handle; |
| 526 | |
| 527 | static void hdcp_lib_clean(struct hdcp_lib_handle *handle); |
| 528 | static void hdcp_lib_init(struct hdcp_lib_handle *handle); |
| 529 | static void hdcp_lib_msg_sent(struct hdcp_lib_handle *handle); |
| 530 | static void hdcp_lib_msg_recvd(struct hdcp_lib_handle *handle); |
| 531 | static void hdcp_lib_timeout(struct hdcp_lib_handle *handle); |
| 532 | static void hdcp_lib_stream(struct hdcp_lib_handle *handle); |
| 533 | static int hdcp_lib_txmtr_init(struct hdcp_lib_handle *handle); |
| 534 | |
| 535 | static struct qseecom_handle *hdcp1_handle; |
| 536 | static bool hdcp1_supported = true; |
| 537 | static bool hdcp1_enc_enabled; |
| 538 | static struct mutex hdcp1_ta_cmd_lock; |
| 539 | |
| 540 | static const char *hdcp_lib_message_name(int msg_id) |
| 541 | { |
| 542 | /* |
| 543 | * Message ID map. The first number indicates the message number |
| 544 | * assigned to the message by the HDCP 2.2 spec. This is also the first |
| 545 | * byte of every HDCP 2.2 authentication protocol message. |
| 546 | */ |
| 547 | static struct hdcp_lib_message_map hdcp_lib_msg_map[] = { |
| 548 | {2, "AKE_INIT"}, |
| 549 | {3, "AKE_SEND_CERT"}, |
| 550 | {4, "AKE_NO_STORED_KM"}, |
| 551 | {5, "AKE_STORED_KM"}, |
| 552 | {7, "AKE_SEND_H_PRIME"}, |
| 553 | {8, "AKE_SEND_PAIRING_INFO"}, |
| 554 | {9, "LC_INIT"}, |
| 555 | {10, "LC_SEND_L_PRIME"}, |
| 556 | {11, "SKE_SEND_EKS"}, |
| 557 | {12, "REPEATER_AUTH_SEND_RECEIVERID_LIST"}, |
| 558 | {15, "REPEATER_AUTH_SEND_ACK"}, |
| 559 | {16, "REPEATER_AUTH_STREAM_MANAGE"}, |
| 560 | {17, "REPEATER_AUTH_STREAM_READY"}, |
| 561 | {18, "SKE_SEND_TYPE_ID"}, |
| 562 | }; |
| 563 | int i; |
| 564 | |
| 565 | for (i = 0; i < ARRAY_SIZE(hdcp_lib_msg_map); i++) { |
| 566 | if (msg_id == hdcp_lib_msg_map[i].msg_id) |
| 567 | return hdcp_lib_msg_map[i].msg_name; |
| 568 | } |
| 569 | return "UNKNOWN"; |
| 570 | } |
| 571 | |
| 572 | static int hdcp_lib_get_next_message(struct hdcp_lib_handle *handle, |
| 573 | struct hdcp_wakeup_data *data) |
| 574 | { |
| 575 | switch (handle->last_msg) { |
| 576 | case INVALID_MESSAGE_ID: |
| 577 | return AKE_INIT_MESSAGE_ID; |
| 578 | case AKE_INIT_MESSAGE_ID: |
| 579 | return AKE_SEND_CERT_MESSAGE_ID; |
| 580 | case AKE_SEND_CERT_MESSAGE_ID: |
| 581 | if (handle->no_stored_km_flag) |
| 582 | return AKE_NO_STORED_KM_MESSAGE_ID; |
| 583 | else |
| 584 | return AKE_STORED_KM_MESSAGE_ID; |
| 585 | case AKE_STORED_KM_MESSAGE_ID: |
| 586 | case AKE_NO_STORED_KM_MESSAGE_ID: |
| 587 | return AKE_SEND_H_PRIME_MESSAGE_ID; |
| 588 | case AKE_SEND_H_PRIME_MESSAGE_ID: |
| 589 | if (handle->no_stored_km_flag) |
| 590 | return AKE_SEND_PAIRING_INFO_MESSAGE_ID; |
| 591 | else |
| 592 | return LC_INIT_MESSAGE_ID; |
| 593 | case AKE_SEND_PAIRING_INFO_MESSAGE_ID: |
| 594 | return LC_INIT_MESSAGE_ID; |
| 595 | case LC_INIT_MESSAGE_ID: |
| 596 | return LC_SEND_L_PRIME_MESSAGE_ID; |
| 597 | case LC_SEND_L_PRIME_MESSAGE_ID: |
| 598 | return SKE_SEND_EKS_MESSAGE_ID; |
| 599 | case SKE_SEND_EKS_MESSAGE_ID: |
| 600 | if (!handle->repeater_flag) |
| 601 | return SKE_SEND_TYPE_ID; |
| 602 | case SKE_SEND_TYPE_ID: |
| 603 | case REPEATER_AUTH_STREAM_READY_MESSAGE_ID: |
| 604 | case REPEATER_AUTH_SEND_ACK_MESSAGE_ID: |
| 605 | if (!handle->repeater_flag) |
| 606 | return INVALID_MESSAGE_ID; |
| 607 | |
| 608 | if (data->cmd == HDCP_WKUP_CMD_SEND_MESSAGE) |
| 609 | return REPEATER_AUTH_STREAM_MANAGE_MESSAGE_ID; |
| 610 | else |
| 611 | return REPEATER_AUTH_SEND_RECEIVERID_LIST_MESSAGE_ID; |
| 612 | case REPEATER_AUTH_SEND_RECEIVERID_LIST_MESSAGE_ID: |
| 613 | return REPEATER_AUTH_SEND_ACK_MESSAGE_ID; |
| 614 | case REPEATER_AUTH_STREAM_MANAGE_MESSAGE_ID: |
| 615 | return REPEATER_AUTH_STREAM_READY_MESSAGE_ID; |
| 616 | default: |
| 617 | pr_err("Uknown message ID (%d)", handle->last_msg); |
| 618 | return -EINVAL; |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | static void hdcp_lib_wait_for_response(struct hdcp_lib_handle *handle, |
| 623 | struct hdcp_wakeup_data *data) |
| 624 | { |
| 625 | switch (handle->last_msg) { |
| 626 | case AKE_SEND_H_PRIME_MESSAGE_ID: |
| 627 | if (handle->no_stored_km_flag) |
| 628 | handle->wait_timeout = HZ; |
| 629 | else |
| 630 | handle->wait_timeout = HZ / 4; |
| 631 | break; |
| 632 | case AKE_SEND_PAIRING_INFO_MESSAGE_ID: |
| 633 | handle->wait_timeout = HZ / 4; |
| 634 | break; |
| 635 | case REPEATER_AUTH_SEND_RECEIVERID_LIST_MESSAGE_ID: |
| 636 | if (!handle->authenticated) |
| 637 | handle->wait_timeout = HZ * 3; |
| 638 | else |
| 639 | handle->wait_timeout = 0; |
| 640 | break; |
| 641 | default: |
| 642 | handle->wait_timeout = 0; |
| 643 | } |
| 644 | |
| 645 | if (handle->wait_timeout) |
| 646 | kthread_queue_work(&handle->worker, &handle->wk_wait); |
| 647 | } |
| 648 | |
| 649 | static void hdcp_lib_wakeup_client(struct hdcp_lib_handle *handle, |
| 650 | struct hdcp_wakeup_data *data) |
| 651 | { |
| 652 | int rc = 0, i; |
| 653 | |
| 654 | if (!handle || !handle->client_ops || !handle->client_ops->wakeup || |
| 655 | !data || (data->cmd == HDCP_WKUP_CMD_INVALID)) |
| 656 | return; |
| 657 | |
| 658 | data->abort_mask = REAUTH_REQ | LINK_INTEGRITY_FAILURE; |
| 659 | |
| 660 | if (data->cmd == HDCP_WKUP_CMD_RECV_MESSAGE || |
| 661 | data->cmd == HDCP_WKUP_CMD_LINK_POLL) |
| 662 | handle->last_msg = hdcp_lib_get_next_message(handle, data); |
| 663 | |
| 664 | if (handle->last_msg != INVALID_MESSAGE_ID && |
| 665 | data->cmd != HDCP_WKUP_CMD_STATUS_SUCCESS && |
| 666 | data->cmd != HDCP_WKUP_CMD_STATUS_FAILED) { |
| 667 | u32 msg_num, rx_status; |
| 668 | const struct hdcp_msg_part *msg; |
| 669 | |
| 670 | pr_debug("lib->client: %s (%s)\n", |
| 671 | hdcp_cmd_to_str(data->cmd), |
| 672 | hdcp_lib_message_name(handle->last_msg)); |
| 673 | |
| 674 | data->message_data = &hdcp_msg_lookup[handle->last_msg]; |
| 675 | |
| 676 | msg_num = data->message_data->num_messages; |
| 677 | msg = data->message_data->messages; |
| 678 | rx_status = data->message_data->rx_status; |
| 679 | |
| 680 | pr_debug("%10s | %6s | %4s\n", "name", "offset", "len"); |
| 681 | |
| 682 | for (i = 0; i < msg_num; i++) |
| 683 | pr_debug("%10s | %6x | %4d\n", |
| 684 | msg[i].name, msg[i].offset, |
| 685 | msg[i].length); |
| 686 | } else { |
| 687 | pr_debug("lib->client: %s\n", hdcp_cmd_to_str(data->cmd)); |
| 688 | } |
| 689 | |
| 690 | rc = handle->client_ops->wakeup(data); |
| 691 | if (rc) |
| 692 | pr_err("error sending %s to client\n", |
| 693 | hdcp_cmd_to_str(data->cmd)); |
| 694 | |
| 695 | hdcp_lib_wait_for_response(handle, data); |
| 696 | } |
| 697 | |
| 698 | static inline void hdcp_lib_send_message(struct hdcp_lib_handle *handle) |
| 699 | { |
| 700 | char msg_name[50]; |
| 701 | struct hdcp_wakeup_data cdata = { |
| 702 | HDCP_WKUP_CMD_SEND_MESSAGE |
| 703 | }; |
| 704 | |
| 705 | cdata.context = handle->client_ctx; |
| 706 | cdata.send_msg_buf = handle->listener_buf; |
| 707 | cdata.send_msg_len = handle->msglen; |
| 708 | cdata.timeout = handle->hdcp_timeout; |
| 709 | |
| 710 | snprintf(msg_name, sizeof(msg_name), "%s: ", |
| 711 | hdcp_lib_message_name((int)cdata.send_msg_buf[0])); |
| 712 | |
| 713 | print_hex_dump(KERN_DEBUG, msg_name, |
| 714 | DUMP_PREFIX_NONE, 16, 1, cdata.send_msg_buf, |
| 715 | cdata.send_msg_len, false); |
| 716 | |
| 717 | hdcp_lib_wakeup_client(handle, &cdata); |
| 718 | } |
| 719 | |
| 720 | static int hdcp_lib_enable_encryption(struct hdcp_lib_handle *handle) |
| 721 | { |
| 722 | int rc = 0; |
| 723 | struct hdcp_set_hw_key_req *req_buf; |
| 724 | struct hdcp_set_hw_key_rsp *rsp_buf; |
| 725 | |
| 726 | if (!handle || !handle->qseecom_handle || |
| 727 | !handle->qseecom_handle->sbuf) { |
| 728 | pr_err("invalid handle\n"); |
| 729 | rc = -EINVAL; |
| 730 | goto error; |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * wait at least 200ms before enabling encryption |
| 735 | * as per hdcp2p2 sepcifications. |
| 736 | */ |
| 737 | msleep(SLEEP_SET_HW_KEY_MS); |
| 738 | |
| 739 | req_buf = (struct hdcp_set_hw_key_req *)(handle->qseecom_handle->sbuf); |
| 740 | req_buf->commandid = HDCP_TXMTR_SET_HW_KEY; |
| 741 | req_buf->ctxhandle = handle->tz_ctxhandle; |
| 742 | |
| 743 | rsp_buf = (struct hdcp_set_hw_key_rsp *) |
| 744 | (handle->qseecom_handle->sbuf + |
| 745 | QSEECOM_ALIGN(sizeof(struct hdcp_set_hw_key_req))); |
| 746 | |
| 747 | rc = qseecom_send_command(handle->qseecom_handle, req_buf, |
| 748 | QSEECOM_ALIGN(sizeof |
| 749 | (struct hdcp_set_hw_key_req)), |
| 750 | rsp_buf, |
| 751 | QSEECOM_ALIGN(sizeof |
| 752 | (struct hdcp_set_hw_key_rsp))); |
| 753 | |
| 754 | if ((rc < 0) || (rsp_buf->status < 0)) { |
| 755 | pr_err("qseecom cmd failed with err = %d status = %d\n", |
| 756 | rc, rsp_buf->status); |
| 757 | rc = -EINVAL; |
| 758 | goto error; |
| 759 | } |
| 760 | |
| 761 | /* reached an authenticated state */ |
| 762 | handle->hdcp_state |= HDCP_STATE_AUTHENTICATED; |
| 763 | |
| 764 | pr_debug("success\n"); |
| 765 | return 0; |
| 766 | error: |
| 767 | if (handle && !atomic_read(&handle->hdcp_off)) |
| 768 | HDCP_LIB_EXECUTE(clean); |
| 769 | |
| 770 | return rc; |
| 771 | } |
| 772 | |
| 773 | static int hdcp_lib_get_version(struct hdcp_lib_handle *handle) |
| 774 | { |
| 775 | int rc = 0; |
| 776 | struct hdcp_version_req *req_buf; |
| 777 | struct hdcp_version_rsp *rsp_buf; |
| 778 | uint32_t app_major_version = 0; |
| 779 | |
| 780 | if (!handle) { |
| 781 | pr_err("invalid input\n"); |
| 782 | rc = -EINVAL; |
| 783 | goto exit; |
| 784 | } |
| 785 | |
| 786 | if (!(handle->hdcp_state & HDCP_STATE_APP_LOADED)) { |
| 787 | pr_err("library not loaded\n"); |
| 788 | rc = -EINVAL; |
| 789 | goto exit; |
| 790 | } |
| 791 | |
| 792 | /* get the TZ hdcp2p2 app version */ |
| 793 | req_buf = (struct hdcp_version_req *)handle->qseecom_handle->sbuf; |
| 794 | req_buf->commandid = HDCP_TXMTR_GET_VERSION; |
| 795 | |
| 796 | rsp_buf = (struct hdcp_version_rsp *) |
| 797 | (handle->qseecom_handle->sbuf + |
| 798 | QSEECOM_ALIGN(sizeof(struct hdcp_version_req))); |
| 799 | |
| 800 | rc = qseecom_send_command(handle->qseecom_handle, |
| 801 | req_buf, |
| 802 | QSEECOM_ALIGN(sizeof |
| 803 | (struct hdcp_lib_init_req)), |
| 804 | rsp_buf, |
| 805 | QSEECOM_ALIGN(sizeof |
| 806 | (struct hdcp_lib_init_rsp))); |
| 807 | |
| 808 | if (rc < 0) { |
| 809 | pr_err("qseecom cmd failed err = %d\n", rc); |
| 810 | goto exit; |
| 811 | } |
| 812 | |
| 813 | app_major_version = HCDP_TXMTR_GET_MAJOR_VERSION(rsp_buf->appversion); |
| 814 | |
| 815 | pr_debug("hdcp2p2 app major version %d, app version %d\n", |
| 816 | app_major_version, rsp_buf->appversion); |
| 817 | |
| 818 | exit: |
| 819 | return rc; |
| 820 | } |
| 821 | |
| 822 | static int hdcp_lib_verify_keys(struct hdcp_lib_handle *handle) |
| 823 | { |
| 824 | int rc = -EINVAL; |
| 825 | struct hdcp_verify_key_req *req_buf; |
| 826 | struct hdcp_verify_key_rsp *rsp_buf; |
| 827 | |
| 828 | if (!handle) { |
| 829 | pr_err("invalid input\n"); |
| 830 | goto exit; |
| 831 | } |
| 832 | |
| 833 | if (!(handle->hdcp_state & HDCP_STATE_APP_LOADED)) { |
| 834 | pr_err("app not loaded\n"); |
| 835 | goto exit; |
| 836 | } |
| 837 | |
| 838 | req_buf = (struct hdcp_verify_key_req *)handle->qseecom_handle->sbuf; |
| 839 | req_buf->commandid = HDCP_TXMTR_VERIFY_KEY; |
| 840 | |
| 841 | rsp_buf = (struct hdcp_verify_key_rsp *) |
| 842 | (handle->qseecom_handle->sbuf + |
| 843 | QSEECOM_ALIGN(sizeof(struct hdcp_verify_key_req))); |
| 844 | |
| 845 | rc = qseecom_send_command(handle->qseecom_handle, |
| 846 | req_buf, |
| 847 | QSEECOM_ALIGN(sizeof |
| 848 | (struct hdcp_verify_key_req)), |
| 849 | rsp_buf, |
| 850 | QSEECOM_ALIGN(sizeof |
| 851 | (struct hdcp_verify_key_rsp))); |
| 852 | |
| 853 | if (rc < 0) { |
| 854 | pr_err("qseecom cmd failed err = %d\n", rc); |
| 855 | goto exit; |
| 856 | } |
| 857 | |
| 858 | return rsp_buf->status; |
| 859 | exit: |
| 860 | return rc; |
| 861 | } |
| 862 | |
| 863 | static int hdcp_app_init(struct hdcp_lib_handle *handle) |
| 864 | { |
| 865 | int rc = 0; |
| 866 | struct hdcp_lib_init_req *req_buf; |
| 867 | struct hdcp_lib_init_rsp *rsp_buf; |
| 868 | uint32_t app_minor_version = 0; |
| 869 | |
| 870 | if (!handle) { |
| 871 | pr_err("invalid input\n"); |
| 872 | goto exit; |
| 873 | } |
| 874 | |
| 875 | if (!(handle->hdcp_state & HDCP_STATE_APP_LOADED)) { |
| 876 | pr_err("library not loaded\n"); |
| 877 | goto exit; |
| 878 | } |
| 879 | |
| 880 | /* now load the app by sending hdcp_lib_init */ |
| 881 | req_buf = (struct hdcp_lib_init_req *)handle->qseecom_handle->sbuf; |
| 882 | req_buf->commandid = HDCP_LIB_INIT; |
| 883 | req_buf->clientversion = |
| 884 | HDCP_CLIENT_MAKE_VERSION(HDCP_CLIENT_MAJOR_VERSION, |
| 885 | HDCP_CLIENT_MINOR_VERSION, |
| 886 | HDCP_CLIENT_PATCH_VERSION); |
| 887 | rsp_buf = (struct hdcp_lib_init_rsp *) |
| 888 | (handle->qseecom_handle->sbuf + |
| 889 | QSEECOM_ALIGN(sizeof(struct hdcp_lib_init_req))); |
| 890 | |
| 891 | rc = qseecom_send_command(handle->qseecom_handle, |
| 892 | req_buf, |
| 893 | QSEECOM_ALIGN(sizeof |
| 894 | (struct hdcp_lib_init_req)), |
| 895 | rsp_buf, |
| 896 | QSEECOM_ALIGN(sizeof |
| 897 | (struct hdcp_lib_init_rsp))); |
| 898 | |
| 899 | if (rc < 0) { |
| 900 | pr_err("qseecom cmd failed err = %d\n", rc); |
| 901 | goto exit; |
| 902 | } |
| 903 | |
| 904 | app_minor_version = HCDP_TXMTR_GET_MINOR_VERSION(rsp_buf->appversion); |
| 905 | if (app_minor_version != HDCP_CLIENT_MINOR_VERSION) { |
| 906 | pr_err |
| 907 | ("client-app minor version mismatch app(%d), client(%d)\n", |
| 908 | app_minor_version, HDCP_CLIENT_MINOR_VERSION); |
| 909 | rc = -1; |
| 910 | goto exit; |
| 911 | } |
| 912 | pr_debug("success\n"); |
| 913 | pr_debug("client version major(%d), minor(%d), patch(%d)\n", |
| 914 | HDCP_CLIENT_MAJOR_VERSION, HDCP_CLIENT_MINOR_VERSION, |
| 915 | HDCP_CLIENT_PATCH_VERSION); |
| 916 | pr_debug("app version major(%d), minor(%d), patch(%d)\n", |
| 917 | HCDP_TXMTR_GET_MAJOR_VERSION(rsp_buf->appversion), |
| 918 | HCDP_TXMTR_GET_MINOR_VERSION(rsp_buf->appversion), |
| 919 | HCDP_TXMTR_GET_PATCH_VERSION(rsp_buf->appversion)); |
| 920 | |
| 921 | exit: |
| 922 | return rc; |
| 923 | } |
| 924 | |
| 925 | static int hdcp_lib_library_load(struct hdcp_lib_handle *handle) |
| 926 | { |
| 927 | int rc = 0; |
| 928 | |
| 929 | if (!handle) { |
| 930 | pr_err("invalid input\n"); |
| 931 | goto exit; |
| 932 | } |
| 933 | |
| 934 | if (handle->hdcp_state & HDCP_STATE_APP_LOADED) { |
| 935 | pr_err("library already loaded\n"); |
| 936 | goto exit; |
| 937 | } |
| 938 | |
| 939 | /* |
| 940 | * allocating resource for qseecom handle |
| 941 | * the app is not loaded here |
| 942 | */ |
| 943 | rc = qseecom_start_app(&(handle->qseecom_handle), |
| 944 | TZAPP_NAME, QSEECOM_SBUFF_SIZE); |
| 945 | if (rc) { |
| 946 | pr_err("qseecom_start_app failed %d\n", rc); |
| 947 | goto exit; |
| 948 | } |
| 949 | |
| 950 | handle->hdcp_state |= HDCP_STATE_APP_LOADED; |
| 951 | pr_debug("qseecom_start_app success\n"); |
| 952 | |
| 953 | rc = hdcp_lib_get_version(handle); |
| 954 | if (rc) { |
| 955 | pr_err("library get version failed\n"); |
| 956 | goto exit; |
| 957 | } |
| 958 | |
| 959 | handle->hdcp_app_init = hdcp_app_init; |
| 960 | handle->hdcp_txmtr_init = hdcp_lib_txmtr_init; |
| 961 | |
| 962 | if (handle->hdcp_app_init == NULL) { |
| 963 | pr_err("invalid app init function pointer\n"); |
| 964 | goto exit; |
| 965 | } |
| 966 | |
| 967 | rc = handle->hdcp_app_init(handle); |
| 968 | if (rc) { |
| 969 | pr_err("app init failed\n"); |
| 970 | goto exit; |
| 971 | } |
| 972 | exit: |
| 973 | return rc; |
| 974 | } |
| 975 | |
| 976 | static int hdcp_lib_library_unload(struct hdcp_lib_handle *handle) |
| 977 | { |
| 978 | int rc = 0; |
| 979 | struct hdcp_lib_deinit_req *req_buf; |
| 980 | struct hdcp_lib_deinit_rsp *rsp_buf; |
| 981 | |
| 982 | if (!handle || !handle->qseecom_handle || |
| 983 | !handle->qseecom_handle->sbuf) { |
| 984 | pr_err("invalid handle\n"); |
| 985 | rc = -EINVAL; |
| 986 | goto exit; |
| 987 | } |
| 988 | |
| 989 | if (!(handle->hdcp_state & HDCP_STATE_APP_LOADED)) { |
| 990 | pr_err("library not loaded\n"); |
| 991 | return rc; |
| 992 | } |
| 993 | |
| 994 | /* unloading app by sending hdcp_lib_deinit cmd */ |
| 995 | req_buf = (struct hdcp_lib_deinit_req *)handle->qseecom_handle->sbuf; |
| 996 | req_buf->commandid = HDCP_LIB_DEINIT; |
| 997 | rsp_buf = (struct hdcp_lib_deinit_rsp *) |
| 998 | (handle->qseecom_handle->sbuf + |
| 999 | QSEECOM_ALIGN(sizeof(struct hdcp_lib_deinit_req))); |
| 1000 | |
| 1001 | rc = qseecom_send_command(handle->qseecom_handle, |
| 1002 | req_buf, |
| 1003 | QSEECOM_ALIGN(sizeof |
| 1004 | (struct hdcp_lib_deinit_req)), |
| 1005 | rsp_buf, |
| 1006 | QSEECOM_ALIGN(sizeof |
| 1007 | (struct hdcp_lib_deinit_rsp))); |
| 1008 | |
| 1009 | if (rc < 0) { |
| 1010 | pr_err("qseecom cmd failed err = %d\n", rc); |
| 1011 | goto exit; |
| 1012 | } |
| 1013 | |
| 1014 | /* deallocate the resources for qseecom handle */ |
| 1015 | rc = qseecom_shutdown_app(&handle->qseecom_handle); |
| 1016 | if (rc) { |
| 1017 | pr_err("qseecom_shutdown_app failed err: %d\n", rc); |
| 1018 | goto exit; |
| 1019 | } |
| 1020 | |
| 1021 | handle->hdcp_state &= ~HDCP_STATE_APP_LOADED; |
| 1022 | pr_debug("success\n"); |
| 1023 | exit: |
| 1024 | return rc; |
| 1025 | } |
| 1026 | |
| 1027 | static int hdcp_lib_session_init(struct hdcp_lib_handle *handle) |
| 1028 | { |
| 1029 | int rc = 0; |
| 1030 | struct hdcp_lib_session_init_req *req_buf; |
| 1031 | struct hdcp_lib_session_init_rsp *rsp_buf; |
| 1032 | |
| 1033 | if (!handle || !handle->qseecom_handle || |
| 1034 | !handle->qseecom_handle->sbuf) { |
| 1035 | pr_err("invalid handle\n"); |
| 1036 | rc = -EINVAL; |
| 1037 | goto exit; |
| 1038 | } |
| 1039 | |
| 1040 | if (!(handle->hdcp_state & HDCP_STATE_APP_LOADED)) { |
| 1041 | pr_err("app not loaded\n"); |
| 1042 | goto exit; |
| 1043 | } |
| 1044 | |
| 1045 | if (handle->hdcp_state & HDCP_STATE_SESSION_INIT) { |
| 1046 | pr_err("session already initialized\n"); |
| 1047 | goto exit; |
| 1048 | } |
| 1049 | |
| 1050 | /* send HDCP_Session_Init command to TZ */ |
| 1051 | req_buf = |
| 1052 | (struct hdcp_lib_session_init_req *)handle->qseecom_handle->sbuf; |
| 1053 | req_buf->commandid = HDCP_SESSION_INIT; |
| 1054 | req_buf->deviceid = handle->device_type; |
| 1055 | rsp_buf = (struct hdcp_lib_session_init_rsp *) |
| 1056 | (handle->qseecom_handle->sbuf + |
| 1057 | QSEECOM_ALIGN(sizeof(struct hdcp_lib_session_init_req))); |
| 1058 | |
| 1059 | rc = qseecom_send_command(handle->qseecom_handle, req_buf, |
| 1060 | QSEECOM_ALIGN(sizeof |
| 1061 | (struct |
| 1062 | hdcp_lib_session_init_req)), |
| 1063 | rsp_buf, |
| 1064 | QSEECOM_ALIGN(sizeof |
| 1065 | (struct |
| 1066 | hdcp_lib_session_init_rsp))); |
| 1067 | |
| 1068 | if ((rc < 0) || (rsp_buf->status != HDCP_SUCCESS) || |
| 1069 | (rsp_buf->commandid != HDCP_SESSION_INIT)) { |
| 1070 | pr_err("qseecom cmd failed with err = %d, status = %d\n", |
| 1071 | rc, rsp_buf->status); |
| 1072 | rc = -EINVAL; |
| 1073 | goto exit; |
| 1074 | } |
| 1075 | |
| 1076 | pr_debug("session id %d\n", rsp_buf->sessionid); |
| 1077 | |
| 1078 | handle->session_id = rsp_buf->sessionid; |
| 1079 | handle->hdcp_state |= HDCP_STATE_SESSION_INIT; |
| 1080 | |
| 1081 | pr_debug("success\n"); |
| 1082 | exit: |
| 1083 | return rc; |
| 1084 | } |
| 1085 | |
| 1086 | static int hdcp_lib_session_deinit(struct hdcp_lib_handle *handle) |
| 1087 | { |
| 1088 | int rc = 0; |
| 1089 | struct hdcp_lib_session_deinit_req *req_buf; |
| 1090 | struct hdcp_lib_session_deinit_rsp *rsp_buf; |
| 1091 | |
| 1092 | if (!handle || !handle->qseecom_handle || |
| 1093 | !handle->qseecom_handle->sbuf) { |
| 1094 | pr_err("invalid handle\n"); |
| 1095 | rc = -EINVAL; |
| 1096 | goto exit; |
| 1097 | } |
| 1098 | |
| 1099 | if (!(handle->hdcp_state & HDCP_STATE_APP_LOADED)) { |
| 1100 | pr_err("app not loaded\n"); |
| 1101 | goto exit; |
| 1102 | } |
| 1103 | |
| 1104 | if (!(handle->hdcp_state & HDCP_STATE_SESSION_INIT)) { |
| 1105 | /* unload library here */ |
| 1106 | pr_err("session not initialized\n"); |
| 1107 | goto exit; |
| 1108 | } |
| 1109 | |
| 1110 | /* send command to TZ */ |
| 1111 | req_buf = |
| 1112 | (struct hdcp_lib_session_deinit_req *)handle->qseecom_handle->sbuf; |
| 1113 | req_buf->commandid = HDCP_SESSION_DEINIT; |
| 1114 | req_buf->sessionid = handle->session_id; |
| 1115 | rsp_buf = (struct hdcp_lib_session_deinit_rsp *) |
| 1116 | (handle->qseecom_handle->sbuf + |
| 1117 | QSEECOM_ALIGN(sizeof(struct hdcp_lib_session_deinit_req))); |
| 1118 | |
| 1119 | rc = qseecom_send_command(handle->qseecom_handle, req_buf, |
| 1120 | QSEECOM_ALIGN(sizeof |
| 1121 | (struct |
| 1122 | hdcp_lib_session_deinit_req)), |
| 1123 | rsp_buf, |
| 1124 | QSEECOM_ALIGN(sizeof |
| 1125 | (struct |
| 1126 | hdcp_lib_session_deinit_rsp))); |
| 1127 | |
| 1128 | if ((rc < 0) || (rsp_buf->status < 0) || |
| 1129 | (rsp_buf->commandid != HDCP_SESSION_DEINIT)) { |
| 1130 | pr_err("qseecom cmd failed with err = %d status = %d\n", |
| 1131 | rc, rsp_buf->status); |
| 1132 | rc = -EINVAL; |
| 1133 | goto exit; |
| 1134 | } |
| 1135 | |
| 1136 | handle->hdcp_state &= ~HDCP_STATE_SESSION_INIT; |
| 1137 | pr_debug("success\n"); |
| 1138 | exit: |
| 1139 | return rc; |
| 1140 | } |
| 1141 | |
| 1142 | static int hdcp_lib_txmtr_init(struct hdcp_lib_handle *handle) |
| 1143 | { |
| 1144 | int rc = 0; |
| 1145 | struct hdcp_tx_init_req *req_buf; |
| 1146 | struct hdcp_tx_init_rsp *rsp_buf; |
| 1147 | |
| 1148 | if (!handle || !handle->qseecom_handle || |
| 1149 | !handle->qseecom_handle->sbuf) { |
| 1150 | pr_err("invalid handle\n"); |
| 1151 | rc = -EINVAL; |
| 1152 | goto exit; |
| 1153 | } |
| 1154 | |
| 1155 | if (!(handle->hdcp_state & HDCP_STATE_SESSION_INIT)) { |
| 1156 | pr_err("session not initialized\n"); |
| 1157 | goto exit; |
| 1158 | } |
| 1159 | |
| 1160 | if (!(handle->hdcp_state & HDCP_STATE_APP_LOADED)) { |
| 1161 | pr_err("library not loaded\n"); |
| 1162 | goto exit; |
| 1163 | } |
| 1164 | |
| 1165 | /* send HDCP_Txmtr_Init command to TZ */ |
| 1166 | req_buf = (struct hdcp_tx_init_req *)handle->qseecom_handle->sbuf; |
| 1167 | req_buf->commandid = HDCP_TXMTR_INIT; |
| 1168 | req_buf->sessionid = handle->session_id; |
| 1169 | rsp_buf = (struct hdcp_tx_init_rsp *) |
| 1170 | (handle->qseecom_handle->sbuf + |
| 1171 | QSEECOM_ALIGN(sizeof(struct hdcp_tx_init_req))); |
| 1172 | |
| 1173 | rc = qseecom_send_command(handle->qseecom_handle, req_buf, |
| 1174 | QSEECOM_ALIGN(sizeof |
| 1175 | (struct hdcp_tx_init_req)), |
| 1176 | rsp_buf, |
| 1177 | QSEECOM_ALIGN(sizeof |
| 1178 | (struct hdcp_tx_init_rsp))); |
| 1179 | |
| 1180 | if ((rc < 0) || (rsp_buf->status != HDCP_SUCCESS) || |
| 1181 | (rsp_buf->commandid != HDCP_TXMTR_INIT)) { |
| 1182 | pr_err("qseecom cmd failed with err = %d, status = %d\n", |
| 1183 | rc, rsp_buf->status); |
| 1184 | rc = -EINVAL; |
| 1185 | goto exit; |
| 1186 | } |
| 1187 | |
| 1188 | handle->tz_ctxhandle = rsp_buf->ctxhandle; |
| 1189 | handle->hdcp_state |= HDCP_STATE_TXMTR_INIT; |
| 1190 | |
| 1191 | pr_debug("success\n"); |
| 1192 | exit: |
| 1193 | return rc; |
| 1194 | } |
| 1195 | |
| 1196 | static int hdcp_lib_txmtr_deinit(struct hdcp_lib_handle *handle) |
| 1197 | { |
| 1198 | int rc = 0; |
| 1199 | struct hdcp_deinit_req *req_buf; |
| 1200 | struct hdcp_deinit_rsp *rsp_buf; |
| 1201 | |
| 1202 | if (!handle || !handle->qseecom_handle || |
| 1203 | !handle->qseecom_handle->sbuf) { |
| 1204 | pr_err("invalid handle\n"); |
| 1205 | rc = -EINVAL; |
| 1206 | goto exit; |
| 1207 | } |
| 1208 | |
| 1209 | if (!(handle->hdcp_state & HDCP_STATE_APP_LOADED)) { |
| 1210 | pr_err("app not loaded\n"); |
| 1211 | goto exit; |
| 1212 | } |
| 1213 | |
| 1214 | if (!(handle->hdcp_state & HDCP_STATE_TXMTR_INIT)) { |
| 1215 | /* unload library here */ |
| 1216 | pr_err("txmtr not initialized\n"); |
| 1217 | goto exit; |
| 1218 | } |
| 1219 | |
| 1220 | /* send command to TZ */ |
| 1221 | req_buf = (struct hdcp_deinit_req *)handle->qseecom_handle->sbuf; |
| 1222 | req_buf->commandid = HDCP_TXMTR_DEINIT; |
| 1223 | req_buf->ctxhandle = handle->tz_ctxhandle; |
| 1224 | rsp_buf = (struct hdcp_deinit_rsp *) |
| 1225 | (handle->qseecom_handle->sbuf + |
| 1226 | QSEECOM_ALIGN(sizeof(struct hdcp_deinit_req))); |
| 1227 | |
| 1228 | rc = qseecom_send_command(handle->qseecom_handle, req_buf, |
| 1229 | QSEECOM_ALIGN(sizeof(struct hdcp_deinit_req)), |
| 1230 | rsp_buf, |
| 1231 | QSEECOM_ALIGN(sizeof |
| 1232 | (struct hdcp_deinit_rsp))); |
| 1233 | |
| 1234 | if ((rc < 0) || (rsp_buf->status < 0) || |
| 1235 | (rsp_buf->commandid != HDCP_TXMTR_DEINIT)) { |
| 1236 | pr_err("qseecom cmd failed with err = %d status = %d\n", |
| 1237 | rc, rsp_buf->status); |
| 1238 | rc = -EINVAL; |
| 1239 | goto exit; |
| 1240 | } |
| 1241 | |
| 1242 | handle->hdcp_state &= ~HDCP_STATE_TXMTR_INIT; |
| 1243 | pr_debug("success\n"); |
| 1244 | exit: |
| 1245 | return rc; |
| 1246 | } |
| 1247 | |
| 1248 | static int hdcp_lib_start_auth(struct hdcp_lib_handle *handle) |
| 1249 | { |
| 1250 | int rc = 0; |
| 1251 | struct hdcp_start_auth_req *req_buf; |
| 1252 | struct hdcp_start_auth_rsp *rsp_buf; |
| 1253 | |
| 1254 | if (!handle || !handle->qseecom_handle || |
| 1255 | !handle->qseecom_handle->sbuf) { |
| 1256 | pr_err("invalid handle\n"); |
| 1257 | rc = -EINVAL; |
| 1258 | goto exit; |
| 1259 | } |
| 1260 | |
| 1261 | if (!(handle->hdcp_state & HDCP_STATE_SESSION_INIT)) { |
| 1262 | pr_err("session not initialized\n"); |
| 1263 | goto exit; |
| 1264 | } |
| 1265 | |
| 1266 | if (!(handle->hdcp_state & HDCP_STATE_TXMTR_INIT)) { |
| 1267 | pr_err("txmtr not initialized\n"); |
| 1268 | goto exit; |
| 1269 | } |
| 1270 | |
| 1271 | /* send HDCP_Txmtr_Start_Auth command to TZ */ |
| 1272 | req_buf = (struct hdcp_start_auth_req *)handle->qseecom_handle->sbuf; |
| 1273 | req_buf->commandid = HDCP_TXMTR_START_AUTHENTICATE; |
| 1274 | req_buf->ctxHandle = handle->tz_ctxhandle; |
| 1275 | rsp_buf = (struct hdcp_start_auth_rsp *) |
| 1276 | (handle->qseecom_handle->sbuf + |
| 1277 | QSEECOM_ALIGN(sizeof(struct hdcp_start_auth_req))); |
| 1278 | |
| 1279 | rc = qseecom_send_command(handle->qseecom_handle, req_buf, |
| 1280 | QSEECOM_ALIGN(sizeof |
| 1281 | (struct hdcp_start_auth_req)), |
| 1282 | rsp_buf, |
| 1283 | QSEECOM_ALIGN(sizeof |
| 1284 | (struct hdcp_start_auth_rsp))); |
| 1285 | |
| 1286 | if ((rc < 0) || (rsp_buf->status != HDCP_SUCCESS) || |
| 1287 | (rsp_buf->commandid != HDCP_TXMTR_START_AUTHENTICATE) || |
| 1288 | (rsp_buf->msglen <= 0) || (rsp_buf->message == NULL)) { |
| 1289 | pr_err("qseecom cmd failed with err = %d, status = %d\n", |
| 1290 | rc, rsp_buf->status); |
| 1291 | rc = -EINVAL; |
| 1292 | goto exit; |
| 1293 | } |
| 1294 | |
| 1295 | pr_debug("recvd %s from TZ at %dms\n", |
| 1296 | hdcp_lib_message_name((int)rsp_buf->message[0]), |
| 1297 | jiffies_to_msecs(jiffies)); |
| 1298 | |
| 1299 | handle->last_msg = (int)rsp_buf->message[0]; |
| 1300 | |
| 1301 | /* send the response to HDMI driver */ |
| 1302 | memset(handle->listener_buf, 0, MAX_TX_MESSAGE_SIZE); |
| 1303 | memcpy(handle->listener_buf, (unsigned char *)rsp_buf->message, |
| 1304 | rsp_buf->msglen); |
| 1305 | handle->msglen = rsp_buf->msglen; |
| 1306 | handle->hdcp_timeout = rsp_buf->timeout; |
| 1307 | |
| 1308 | handle->tz_ctxhandle = rsp_buf->ctxhandle; |
| 1309 | |
| 1310 | pr_debug("success\n"); |
| 1311 | exit: |
| 1312 | return rc; |
| 1313 | } |
| 1314 | |
| 1315 | static void hdcp_lib_stream(struct hdcp_lib_handle *handle) |
| 1316 | { |
| 1317 | int rc = 0; |
| 1318 | struct hdcp_query_stream_type_req *req_buf; |
| 1319 | struct hdcp_query_stream_type_rsp *rsp_buf; |
| 1320 | |
| 1321 | if (!handle || !handle->qseecom_handle || |
| 1322 | !handle->qseecom_handle->sbuf) { |
| 1323 | pr_err("invalid handle\n"); |
| 1324 | return; |
| 1325 | } |
| 1326 | |
| 1327 | if (atomic_read(&handle->hdcp_off)) { |
| 1328 | pr_debug("invalid state, hdcp off\n"); |
| 1329 | return; |
| 1330 | } |
| 1331 | |
| 1332 | if (!handle->repeater_flag) { |
| 1333 | pr_debug("invalid state, not a repeater\n"); |
| 1334 | return; |
| 1335 | } |
| 1336 | |
| 1337 | /* send command to TZ */ |
| 1338 | req_buf = |
| 1339 | (struct hdcp_query_stream_type_req *)handle->qseecom_handle->sbuf; |
| 1340 | req_buf->commandid = HDCP_TXMTR_QUERY_STREAM_TYPE; |
| 1341 | req_buf->ctxhandle = handle->tz_ctxhandle; |
| 1342 | rsp_buf = (struct hdcp_query_stream_type_rsp *) |
| 1343 | (handle->qseecom_handle->sbuf + |
| 1344 | QSEECOM_ALIGN(sizeof(struct hdcp_query_stream_type_req))); |
| 1345 | |
| 1346 | rc = qseecom_send_command(handle->qseecom_handle, req_buf, |
| 1347 | QSEECOM_ALIGN(sizeof |
| 1348 | (struct |
| 1349 | hdcp_query_stream_type_req)), |
| 1350 | rsp_buf, |
| 1351 | QSEECOM_ALIGN(sizeof |
| 1352 | (struct |
| 1353 | hdcp_query_stream_type_rsp))); |
| 1354 | |
| 1355 | if ((rc < 0) || (rsp_buf->status < 0) || (rsp_buf->msglen <= 0) || |
| 1356 | (rsp_buf->commandid != HDCP_TXMTR_QUERY_STREAM_TYPE) || |
| 1357 | (rsp_buf->msg == NULL)) { |
| 1358 | pr_err("qseecom cmd failed with err=%d status=%d\n", |
| 1359 | rc, rsp_buf->status); |
| 1360 | rc = -EINVAL; |
| 1361 | goto exit; |
| 1362 | } |
| 1363 | |
| 1364 | pr_debug("message received from TZ: %s\n", |
| 1365 | hdcp_lib_message_name((int)rsp_buf->msg[0])); |
| 1366 | |
| 1367 | handle->last_msg = (int)rsp_buf->msg[0]; |
| 1368 | |
| 1369 | memset(handle->listener_buf, 0, MAX_TX_MESSAGE_SIZE); |
| 1370 | memcpy(handle->listener_buf, (unsigned char *)rsp_buf->msg, |
| 1371 | rsp_buf->msglen); |
| 1372 | handle->hdcp_timeout = rsp_buf->timeout; |
| 1373 | handle->msglen = rsp_buf->msglen; |
| 1374 | exit: |
| 1375 | if (!rc && !atomic_read(&handle->hdcp_off)) |
| 1376 | hdcp_lib_send_message(handle); |
| 1377 | } |
| 1378 | |
| 1379 | static void hdcp_lib_query_stream_work(struct kthread_work *work) |
| 1380 | { |
| 1381 | struct hdcp_lib_handle *handle = container_of(work, |
| 1382 | struct hdcp_lib_handle, |
| 1383 | wk_stream); |
| 1384 | |
| 1385 | hdcp_lib_stream(handle); |
| 1386 | } |
| 1387 | |
| 1388 | static bool hdcp_lib_client_feature_supported(void *phdcpcontext) |
| 1389 | { |
| 1390 | int rc = 0; |
| 1391 | bool supported = false; |
| 1392 | struct hdcp_lib_handle *handle = phdcpcontext; |
| 1393 | |
| 1394 | if (!handle) { |
| 1395 | pr_err("invalid input\n"); |
| 1396 | goto exit; |
| 1397 | } |
| 1398 | |
| 1399 | if (handle->feature_supported) { |
| 1400 | supported = true; |
| 1401 | goto exit; |
| 1402 | } |
| 1403 | |
| 1404 | rc = hdcp_lib_library_load(handle); |
| 1405 | if (!rc) { |
| 1406 | if (!hdcp_lib_verify_keys(handle)) { |
| 1407 | pr_debug("HDCP2p2 supported\n"); |
| 1408 | handle->feature_supported = true; |
| 1409 | supported = true; |
| 1410 | } |
| 1411 | hdcp_lib_library_unload(handle); |
| 1412 | } |
| 1413 | exit: |
| 1414 | return supported; |
| 1415 | } |
| 1416 | |
| 1417 | static void hdcp_lib_check_worker_status(struct hdcp_lib_handle *handle) |
| 1418 | { |
| 1419 | if (!list_empty(&handle->wk_init.node)) |
| 1420 | pr_debug("init work queued\n"); |
| 1421 | |
| 1422 | if (handle->worker.current_work == &handle->wk_init) |
| 1423 | pr_debug("init work executing\n"); |
| 1424 | |
| 1425 | if (!list_empty(&handle->wk_msg_sent.node)) |
| 1426 | pr_debug("msg_sent work queued\n"); |
| 1427 | |
| 1428 | if (handle->worker.current_work == &handle->wk_msg_sent) |
| 1429 | pr_debug("msg_sent work executing\n"); |
| 1430 | |
| 1431 | if (!list_empty(&handle->wk_msg_recvd.node)) |
| 1432 | pr_debug("msg_recvd work queued\n"); |
| 1433 | |
| 1434 | if (handle->worker.current_work == &handle->wk_msg_recvd) |
| 1435 | pr_debug("msg_recvd work executing\n"); |
| 1436 | |
| 1437 | if (!list_empty(&handle->wk_timeout.node)) |
| 1438 | pr_debug("timeout work queued\n"); |
| 1439 | |
| 1440 | if (handle->worker.current_work == &handle->wk_timeout) |
| 1441 | pr_debug("timeout work executing\n"); |
| 1442 | |
| 1443 | if (!list_empty(&handle->wk_clean.node)) |
| 1444 | pr_debug("clean work queued\n"); |
| 1445 | |
| 1446 | if (handle->worker.current_work == &handle->wk_clean) |
| 1447 | pr_debug("clean work executing\n"); |
| 1448 | |
| 1449 | if (!list_empty(&handle->wk_wait.node)) |
| 1450 | pr_debug("wait work queued\n"); |
| 1451 | |
| 1452 | if (handle->worker.current_work == &handle->wk_wait) |
| 1453 | pr_debug("wait work executing\n"); |
| 1454 | |
| 1455 | if (!list_empty(&handle->wk_stream.node)) |
| 1456 | pr_debug("stream work queued\n"); |
| 1457 | |
| 1458 | if (handle->worker.current_work == &handle->wk_stream) |
| 1459 | pr_debug("stream work executing\n"); |
| 1460 | } |
| 1461 | |
| 1462 | static int hdcp_lib_check_valid_state(struct hdcp_lib_handle *handle) |
| 1463 | { |
| 1464 | int rc = 0; |
| 1465 | |
| 1466 | if (!list_empty(&handle->worker.work_list)) |
| 1467 | hdcp_lib_check_worker_status(handle); |
| 1468 | |
| 1469 | if (handle->wakeup_cmd == HDCP_LIB_WKUP_CMD_START) { |
| 1470 | if (!list_empty(&handle->worker.work_list)) { |
| 1471 | pr_debug("error: queue not empty\n"); |
| 1472 | rc = -EBUSY; |
| 1473 | goto exit; |
| 1474 | } |
| 1475 | |
| 1476 | if (handle->hdcp_state & HDCP_STATE_APP_LOADED) { |
| 1477 | pr_debug("library already loaded\n"); |
| 1478 | rc = -EBUSY; |
| 1479 | goto exit; |
| 1480 | } |
| 1481 | } else { |
| 1482 | if (atomic_read(&handle->hdcp_off)) { |
| 1483 | pr_debug("hdcp2.2 session tearing down\n"); |
| 1484 | goto exit; |
| 1485 | } |
| 1486 | |
| 1487 | if (!(handle->hdcp_state & HDCP_STATE_APP_LOADED)) { |
| 1488 | pr_debug("hdcp 2.2 app not loaded\n"); |
| 1489 | goto exit; |
| 1490 | } |
| 1491 | } |
| 1492 | exit: |
| 1493 | return rc; |
| 1494 | } |
| 1495 | |
| 1496 | static int hdcp_lib_wakeup_thread(struct hdcp_lib_wakeup_data *data) |
| 1497 | { |
| 1498 | struct hdcp_lib_handle *handle; |
| 1499 | int rc = 0; |
| 1500 | |
| 1501 | if (!data) |
| 1502 | return -EINVAL; |
| 1503 | |
| 1504 | handle = data->context; |
| 1505 | if (!handle) |
| 1506 | return -EINVAL; |
| 1507 | |
| 1508 | mutex_lock(&handle->wakeup_mutex); |
| 1509 | |
| 1510 | handle->wakeup_cmd = data->cmd; |
| 1511 | handle->timeout_left = data->timeout; |
| 1512 | |
| 1513 | pr_debug("client->lib: %s (%s)\n", |
| 1514 | hdcp_lib_cmd_to_str(data->cmd), |
| 1515 | hdcp_lib_message_name(handle->last_msg)); |
| 1516 | |
| 1517 | rc = hdcp_lib_check_valid_state(handle); |
| 1518 | if (rc) |
| 1519 | goto exit; |
| 1520 | |
| 1521 | mutex_lock(&handle->msg_lock); |
| 1522 | if (data->recvd_msg_len) { |
| 1523 | kzfree(handle->last_msg_recvd_buf); |
| 1524 | |
| 1525 | handle->last_msg_recvd_len = data->recvd_msg_len; |
| 1526 | handle->last_msg_recvd_buf = kzalloc(data->recvd_msg_len, |
| 1527 | GFP_KERNEL); |
| 1528 | if (!handle->last_msg_recvd_buf) { |
| 1529 | rc = -ENOMEM; |
| 1530 | mutex_unlock(&handle->msg_lock); |
| 1531 | goto exit; |
| 1532 | } |
| 1533 | |
| 1534 | memcpy(handle->last_msg_recvd_buf, data->recvd_msg_buf, |
| 1535 | data->recvd_msg_len); |
| 1536 | } |
| 1537 | mutex_unlock(&handle->msg_lock); |
| 1538 | |
| 1539 | if (!completion_done(&handle->poll_wait)) |
| 1540 | complete_all(&handle->poll_wait); |
| 1541 | |
| 1542 | switch (handle->wakeup_cmd) { |
| 1543 | case HDCP_LIB_WKUP_CMD_START: |
| 1544 | handle->no_stored_km_flag = 0; |
| 1545 | handle->repeater_flag = false; |
| 1546 | handle->update_stream = false; |
| 1547 | handle->last_msg_sent = 0; |
| 1548 | handle->last_msg = INVALID_MESSAGE_ID; |
| 1549 | handle->hdcp_timeout = 0; |
| 1550 | handle->timeout_left = 0; |
| 1551 | atomic_set(&handle->hdcp_off, 0); |
| 1552 | handle->hdcp_state = HDCP_STATE_INIT; |
| 1553 | |
| 1554 | HDCP_LIB_EXECUTE(init); |
| 1555 | break; |
| 1556 | case HDCP_LIB_WKUP_CMD_STOP: |
| 1557 | atomic_set(&handle->hdcp_off, 1); |
| 1558 | |
| 1559 | HDCP_LIB_EXECUTE(clean); |
| 1560 | break; |
| 1561 | case HDCP_LIB_WKUP_CMD_MSG_SEND_SUCCESS: |
| 1562 | handle->last_msg_sent = handle->listener_buf[0]; |
| 1563 | |
| 1564 | HDCP_LIB_EXECUTE(msg_sent); |
| 1565 | break; |
| 1566 | case HDCP_LIB_WKUP_CMD_MSG_SEND_FAILED: |
| 1567 | case HDCP_LIB_WKUP_CMD_MSG_RECV_FAILED: |
| 1568 | case HDCP_LIB_WKUP_CMD_LINK_FAILED: |
| 1569 | handle->hdcp_state |= HDCP_STATE_ERROR; |
| 1570 | HDCP_LIB_EXECUTE(clean); |
| 1571 | break; |
| 1572 | case HDCP_LIB_WKUP_CMD_MSG_RECV_SUCCESS: |
| 1573 | HDCP_LIB_EXECUTE(msg_recvd); |
| 1574 | break; |
| 1575 | case HDCP_LIB_WKUP_CMD_MSG_RECV_TIMEOUT: |
| 1576 | HDCP_LIB_EXECUTE(timeout); |
| 1577 | break; |
| 1578 | case HDCP_LIB_WKUP_CMD_QUERY_STREAM_TYPE: |
| 1579 | HDCP_LIB_EXECUTE(stream); |
| 1580 | break; |
| 1581 | default: |
| 1582 | pr_err("invalid wakeup command %d\n", handle->wakeup_cmd); |
| 1583 | } |
| 1584 | exit: |
| 1585 | mutex_unlock(&handle->wakeup_mutex); |
| 1586 | |
| 1587 | return rc; |
| 1588 | } |
| 1589 | |
| 1590 | static void hdcp_lib_msg_sent(struct hdcp_lib_handle *handle) |
| 1591 | { |
| 1592 | struct hdcp_wakeup_data cdata = { HDCP_WKUP_CMD_INVALID }; |
| 1593 | |
| 1594 | if (!handle) { |
| 1595 | pr_err("invalid handle\n"); |
| 1596 | return; |
| 1597 | } |
| 1598 | |
| 1599 | cdata.context = handle->client_ctx; |
| 1600 | |
| 1601 | switch (handle->last_msg_sent) { |
| 1602 | case SKE_SEND_TYPE_ID: |
| 1603 | if (!hdcp_lib_enable_encryption(handle)) { |
| 1604 | handle->authenticated = true; |
| 1605 | |
| 1606 | cdata.cmd = HDCP_WKUP_CMD_STATUS_SUCCESS; |
| 1607 | hdcp_lib_wakeup_client(handle, &cdata); |
| 1608 | } |
| 1609 | |
| 1610 | /* poll for link check */ |
| 1611 | cdata.cmd = HDCP_WKUP_CMD_LINK_POLL; |
| 1612 | break; |
| 1613 | case SKE_SEND_EKS_MESSAGE_ID: |
| 1614 | if (handle->repeater_flag) { |
| 1615 | /* poll for link check */ |
| 1616 | cdata.cmd = HDCP_WKUP_CMD_LINK_POLL; |
| 1617 | } else { |
| 1618 | memset(handle->listener_buf, 0, MAX_TX_MESSAGE_SIZE); |
| 1619 | handle->listener_buf[0] = SKE_SEND_TYPE_ID; |
| 1620 | handle->msglen = 2; |
| 1621 | cdata.cmd = HDCP_WKUP_CMD_SEND_MESSAGE; |
| 1622 | cdata.send_msg_buf = handle->listener_buf; |
| 1623 | cdata.send_msg_len = handle->msglen; |
| 1624 | handle->last_msg = hdcp_lib_get_next_message(handle, |
| 1625 | &cdata); |
| 1626 | } |
| 1627 | break; |
| 1628 | case REPEATER_AUTH_SEND_ACK_MESSAGE_ID: |
| 1629 | pr_debug("Repeater authentication successful\n"); |
| 1630 | |
| 1631 | if (handle->update_stream) { |
| 1632 | HDCP_LIB_EXECUTE(stream); |
| 1633 | handle->update_stream = false; |
| 1634 | } else { |
| 1635 | cdata.cmd = HDCP_WKUP_CMD_LINK_POLL; |
| 1636 | } |
| 1637 | break; |
| 1638 | default: |
| 1639 | cdata.cmd = HDCP_WKUP_CMD_RECV_MESSAGE; |
| 1640 | cdata.timeout = handle->timeout_left; |
| 1641 | } |
| 1642 | |
| 1643 | hdcp_lib_wakeup_client(handle, &cdata); |
| 1644 | } |
| 1645 | |
| 1646 | static void hdcp_lib_msg_sent_work(struct kthread_work *work) |
| 1647 | { |
| 1648 | struct hdcp_lib_handle *handle = container_of(work, |
| 1649 | struct hdcp_lib_handle, |
| 1650 | wk_msg_sent); |
| 1651 | |
| 1652 | if (handle->wakeup_cmd != HDCP_LIB_WKUP_CMD_MSG_SEND_SUCCESS) { |
| 1653 | pr_err("invalid wakeup command %d\n", handle->wakeup_cmd); |
| 1654 | return; |
| 1655 | } |
| 1656 | |
| 1657 | hdcp_lib_msg_sent(handle); |
| 1658 | } |
| 1659 | |
| 1660 | static void hdcp_lib_init(struct hdcp_lib_handle *handle) |
| 1661 | { |
| 1662 | int rc = 0; |
| 1663 | |
| 1664 | if (!handle) { |
| 1665 | pr_err("invalid handle\n"); |
| 1666 | return; |
| 1667 | } |
| 1668 | |
| 1669 | if (handle->wakeup_cmd != HDCP_LIB_WKUP_CMD_START) { |
| 1670 | pr_err("invalid wakeup command %d\n", handle->wakeup_cmd); |
| 1671 | return; |
| 1672 | } |
| 1673 | |
| 1674 | rc = hdcp_lib_library_load(handle); |
| 1675 | if (rc) |
| 1676 | goto exit; |
| 1677 | |
| 1678 | rc = hdcp_lib_session_init(handle); |
| 1679 | if (rc) |
| 1680 | goto exit; |
| 1681 | |
| 1682 | if (handle->hdcp_txmtr_init == NULL) { |
| 1683 | pr_err("invalid txmtr init function pointer\n"); |
| 1684 | return; |
| 1685 | } |
| 1686 | |
| 1687 | rc = handle->hdcp_txmtr_init(handle); |
| 1688 | if (rc) |
| 1689 | goto exit; |
| 1690 | |
| 1691 | rc = hdcp_lib_start_auth(handle); |
| 1692 | if (rc) |
| 1693 | goto exit; |
| 1694 | |
| 1695 | hdcp_lib_send_message(handle); |
| 1696 | |
| 1697 | return; |
| 1698 | exit: |
| 1699 | HDCP_LIB_EXECUTE(clean); |
| 1700 | } |
| 1701 | |
| 1702 | static void hdcp_lib_init_work(struct kthread_work *work) |
| 1703 | { |
| 1704 | struct hdcp_lib_handle *handle = container_of(work, |
| 1705 | struct hdcp_lib_handle, |
| 1706 | wk_init); |
| 1707 | |
| 1708 | hdcp_lib_init(handle); |
| 1709 | } |
| 1710 | |
| 1711 | static void hdcp_lib_timeout(struct hdcp_lib_handle *handle) |
| 1712 | { |
| 1713 | int rc = 0; |
| 1714 | struct hdcp_send_timeout_req *req_buf; |
| 1715 | struct hdcp_send_timeout_rsp *rsp_buf; |
| 1716 | |
| 1717 | if (!handle || !handle->qseecom_handle || |
| 1718 | !handle->qseecom_handle->sbuf) { |
| 1719 | pr_debug("invalid handle\n"); |
| 1720 | return; |
| 1721 | } |
| 1722 | |
| 1723 | if (atomic_read(&handle->hdcp_off)) { |
| 1724 | pr_debug("invalid state, hdcp off\n"); |
| 1725 | return; |
| 1726 | } |
| 1727 | |
| 1728 | req_buf = (struct hdcp_send_timeout_req *) |
| 1729 | (handle->qseecom_handle->sbuf); |
| 1730 | req_buf->commandid = HDCP_TXMTR_SEND_MESSAGE_TIMEOUT; |
| 1731 | req_buf->ctxhandle = handle->tz_ctxhandle; |
| 1732 | |
| 1733 | rsp_buf = (struct hdcp_send_timeout_rsp *) |
| 1734 | (handle->qseecom_handle->sbuf + |
| 1735 | QSEECOM_ALIGN(sizeof(struct hdcp_send_timeout_req))); |
| 1736 | |
| 1737 | rc = qseecom_send_command(handle->qseecom_handle, req_buf, |
| 1738 | QSEECOM_ALIGN(sizeof |
| 1739 | (struct hdcp_send_timeout_req)), |
| 1740 | rsp_buf, |
| 1741 | QSEECOM_ALIGN(sizeof |
| 1742 | (struct |
| 1743 | hdcp_send_timeout_rsp))); |
| 1744 | |
| 1745 | if ((rc < 0) || (rsp_buf->status != HDCP_SUCCESS)) { |
| 1746 | pr_err("qseecom cmd failed for with err = %d status = %d\n", |
| 1747 | rc, rsp_buf->status); |
| 1748 | rc = -EINVAL; |
| 1749 | goto error; |
| 1750 | } |
| 1751 | |
| 1752 | if (rsp_buf->commandid == HDCP_TXMTR_SEND_MESSAGE_TIMEOUT) { |
| 1753 | pr_err("HDCP_TXMTR_SEND_MESSAGE_TIMEOUT\n"); |
| 1754 | rc = -EINVAL; |
| 1755 | goto error; |
| 1756 | } |
| 1757 | |
| 1758 | /* |
| 1759 | * if the response contains LC_Init message |
| 1760 | * send the message again to TZ |
| 1761 | */ |
| 1762 | if ((rsp_buf->commandid == HDCP_TXMTR_PROCESS_RECEIVED_MESSAGE) && |
| 1763 | ((int)rsp_buf->message[0] == LC_INIT_MESSAGE_ID) && |
| 1764 | (rsp_buf->msglen == LC_INIT_MESSAGE_SIZE)) { |
| 1765 | if (!atomic_read(&handle->hdcp_off)) { |
| 1766 | /* keep local copy of TZ response */ |
| 1767 | memset(handle->listener_buf, 0, MAX_TX_MESSAGE_SIZE); |
| 1768 | memcpy(handle->listener_buf, |
| 1769 | (unsigned char *)rsp_buf->message, |
| 1770 | rsp_buf->msglen); |
| 1771 | handle->hdcp_timeout = rsp_buf->timeout; |
| 1772 | handle->msglen = rsp_buf->msglen; |
| 1773 | |
| 1774 | hdcp_lib_send_message(handle); |
| 1775 | } |
| 1776 | } |
| 1777 | |
| 1778 | return; |
| 1779 | error: |
| 1780 | if (!atomic_read(&handle->hdcp_off)) |
| 1781 | HDCP_LIB_EXECUTE(clean); |
| 1782 | } |
| 1783 | |
| 1784 | static void hdcp_lib_manage_timeout_work(struct kthread_work *work) |
| 1785 | { |
| 1786 | struct hdcp_lib_handle *handle = container_of(work, |
| 1787 | struct hdcp_lib_handle, |
| 1788 | wk_timeout); |
| 1789 | |
| 1790 | hdcp_lib_timeout(handle); |
| 1791 | } |
| 1792 | |
| 1793 | static void hdcp_lib_clean(struct hdcp_lib_handle *handle) |
| 1794 | { |
| 1795 | struct hdcp_wakeup_data cdata = { HDCP_WKUP_CMD_INVALID }; |
| 1796 | |
| 1797 | if (!handle) { |
| 1798 | pr_err("invalid input\n"); |
| 1799 | return; |
| 1800 | } |
| 1801 | |
| 1802 | handle->authenticated = false; |
| 1803 | |
| 1804 | hdcp_lib_txmtr_deinit(handle); |
| 1805 | hdcp_lib_session_deinit(handle); |
| 1806 | hdcp_lib_library_unload(handle); |
| 1807 | |
| 1808 | cdata.context = handle->client_ctx; |
| 1809 | cdata.cmd = HDCP_WKUP_CMD_STATUS_FAILED; |
| 1810 | |
| 1811 | if (!atomic_read(&handle->hdcp_off)) |
| 1812 | hdcp_lib_wakeup_client(handle, &cdata); |
| 1813 | |
| 1814 | atomic_set(&handle->hdcp_off, 1); |
| 1815 | } |
| 1816 | |
| 1817 | static void hdcp_lib_cleanup_work(struct kthread_work *work) |
| 1818 | { |
| 1819 | |
| 1820 | struct hdcp_lib_handle *handle = container_of(work, |
| 1821 | struct hdcp_lib_handle, |
| 1822 | wk_clean); |
| 1823 | |
| 1824 | hdcp_lib_clean(handle); |
| 1825 | } |
| 1826 | |
| 1827 | static void hdcp_lib_msg_recvd(struct hdcp_lib_handle *handle) |
| 1828 | { |
| 1829 | int rc = 0; |
| 1830 | struct hdcp_wakeup_data cdata = { HDCP_WKUP_CMD_INVALID }; |
| 1831 | struct hdcp_rcvd_msg_req *req_buf; |
| 1832 | struct hdcp_rcvd_msg_rsp *rsp_buf; |
| 1833 | uint32_t msglen; |
| 1834 | char *msg = NULL; |
| 1835 | char msg_name[50]; |
| 1836 | uint32_t message_id_bytes = 0; |
| 1837 | |
| 1838 | if (!handle || !handle->qseecom_handle || |
| 1839 | !handle->qseecom_handle->sbuf) { |
| 1840 | pr_err("invalid handle\n"); |
| 1841 | return; |
| 1842 | } |
| 1843 | |
| 1844 | if (atomic_read(&handle->hdcp_off)) { |
| 1845 | pr_debug("invalid state, hdcp off\n"); |
| 1846 | return; |
| 1847 | } |
| 1848 | |
| 1849 | cdata.context = handle->client_ctx; |
| 1850 | |
| 1851 | mutex_lock(&handle->msg_lock); |
| 1852 | msglen = handle->last_msg_recvd_len; |
| 1853 | |
| 1854 | if (msglen <= 0) { |
| 1855 | pr_err("invalid msg len\n"); |
| 1856 | mutex_unlock(&handle->msg_lock); |
| 1857 | rc = -EINVAL; |
| 1858 | goto exit; |
| 1859 | } |
| 1860 | |
| 1861 | /* If the client is DP then allocate extra byte for message ID. */ |
| 1862 | if (handle->device_type == HDCP_TXMTR_DP) |
| 1863 | message_id_bytes = 1; |
| 1864 | |
| 1865 | msglen += message_id_bytes; |
| 1866 | |
| 1867 | msg = kzalloc(msglen, GFP_KERNEL); |
| 1868 | if (!msg) { |
| 1869 | mutex_unlock(&handle->msg_lock); |
| 1870 | rc = -ENOMEM; |
| 1871 | goto exit; |
| 1872 | } |
| 1873 | |
| 1874 | /* copy the message id if needed */ |
| 1875 | if (message_id_bytes) |
| 1876 | memcpy(msg, &handle->last_msg, message_id_bytes); |
| 1877 | |
| 1878 | memcpy(msg + message_id_bytes, |
| 1879 | handle->last_msg_recvd_buf, |
| 1880 | handle->last_msg_recvd_len); |
| 1881 | |
| 1882 | mutex_unlock(&handle->msg_lock); |
| 1883 | |
| 1884 | snprintf(msg_name, sizeof(msg_name), "%s: ", |
| 1885 | hdcp_lib_message_name((int)msg[0])); |
| 1886 | |
| 1887 | print_hex_dump(KERN_DEBUG, msg_name, |
| 1888 | DUMP_PREFIX_NONE, 16, 1, msg, msglen, false); |
| 1889 | |
| 1890 | /* send the message to QSEECOM */ |
| 1891 | req_buf = (struct hdcp_rcvd_msg_req *)(handle->qseecom_handle->sbuf); |
| 1892 | req_buf->commandid = HDCP_TXMTR_PROCESS_RECEIVED_MESSAGE; |
| 1893 | memcpy(req_buf->msg, msg, msglen); |
| 1894 | req_buf->msglen = msglen; |
| 1895 | req_buf->ctxhandle = handle->tz_ctxhandle; |
| 1896 | |
| 1897 | rsp_buf = |
| 1898 | (struct hdcp_rcvd_msg_rsp *)(handle->qseecom_handle->sbuf + |
| 1899 | QSEECOM_ALIGN(sizeof |
| 1900 | (struct |
| 1901 | hdcp_rcvd_msg_req))); |
| 1902 | |
| 1903 | pr_debug("writing %s to TZ at %dms\n", |
| 1904 | hdcp_lib_message_name((int)msg[0]), jiffies_to_msecs(jiffies)); |
| 1905 | |
| 1906 | rc = qseecom_send_command(handle->qseecom_handle, req_buf, |
| 1907 | QSEECOM_ALIGN(sizeof |
| 1908 | (struct hdcp_rcvd_msg_req)), |
| 1909 | rsp_buf, |
| 1910 | QSEECOM_ALIGN(sizeof |
| 1911 | (struct hdcp_rcvd_msg_rsp))); |
| 1912 | |
| 1913 | /* get next message from sink if we receive H PRIME on no store km */ |
| 1914 | if ((msg[0] == AKE_SEND_H_PRIME_MESSAGE_ID) && |
| 1915 | handle->no_stored_km_flag) { |
| 1916 | handle->hdcp_timeout = rsp_buf->timeout; |
| 1917 | |
| 1918 | cdata.cmd = HDCP_WKUP_CMD_RECV_MESSAGE; |
| 1919 | cdata.timeout = handle->hdcp_timeout; |
| 1920 | |
| 1921 | goto exit; |
| 1922 | } |
| 1923 | |
| 1924 | if ((msg[0] == REPEATER_AUTH_STREAM_READY_MESSAGE_ID) && |
| 1925 | (rc == 0) && (rsp_buf->status == 0)) { |
| 1926 | pr_debug("Got Auth_Stream_Ready, nothing sent to rx\n"); |
| 1927 | |
| 1928 | if (!handle->authenticated && |
| 1929 | !hdcp_lib_enable_encryption(handle)) { |
| 1930 | handle->authenticated = true; |
| 1931 | |
| 1932 | cdata.cmd = HDCP_WKUP_CMD_STATUS_SUCCESS; |
| 1933 | hdcp_lib_wakeup_client(handle, &cdata); |
| 1934 | } |
| 1935 | |
| 1936 | cdata.cmd = HDCP_WKUP_CMD_LINK_POLL; |
| 1937 | goto exit; |
| 1938 | } |
| 1939 | |
| 1940 | if ((rc < 0) || (rsp_buf->status != 0) || (rsp_buf->msglen <= 0) || |
| 1941 | (rsp_buf->commandid != HDCP_TXMTR_PROCESS_RECEIVED_MESSAGE) || |
| 1942 | (rsp_buf->msg == NULL)) { |
| 1943 | pr_err("qseecom cmd failed with err=%d status=%d\n", |
| 1944 | rc, rsp_buf->status); |
| 1945 | rc = -EINVAL; |
| 1946 | goto exit; |
| 1947 | } |
| 1948 | |
| 1949 | pr_debug("recvd %s from TZ at %dms\n", |
| 1950 | hdcp_lib_message_name((int)rsp_buf->msg[0]), |
| 1951 | jiffies_to_msecs(jiffies)); |
| 1952 | |
| 1953 | handle->last_msg = (int)rsp_buf->msg[0]; |
| 1954 | |
| 1955 | /* set the flag if response is AKE_No_Stored_km */ |
| 1956 | if (((int)rsp_buf->msg[0] == AKE_NO_STORED_KM_MESSAGE_ID)) { |
| 1957 | pr_debug("Setting no_stored_km_flag\n"); |
| 1958 | handle->no_stored_km_flag = 1; |
| 1959 | } else { |
| 1960 | handle->no_stored_km_flag = 0; |
| 1961 | } |
| 1962 | |
| 1963 | /* check if it's a repeater */ |
| 1964 | if ((rsp_buf->msg[0] == SKE_SEND_EKS_MESSAGE_ID) && |
| 1965 | (rsp_buf->msglen == SKE_SEND_EKS_MESSAGE_SIZE)) { |
| 1966 | if ((rsp_buf->flag == |
| 1967 | HDCP_TXMTR_SUBSTATE_WAITING_FOR_RECIEVERID_LIST) && |
| 1968 | (rsp_buf->timeout > 0)) |
| 1969 | handle->repeater_flag = true; |
| 1970 | handle->update_stream = true; |
| 1971 | } |
| 1972 | |
| 1973 | memset(handle->listener_buf, 0, MAX_TX_MESSAGE_SIZE); |
| 1974 | memcpy(handle->listener_buf, (unsigned char *)rsp_buf->msg, |
| 1975 | rsp_buf->msglen); |
| 1976 | handle->hdcp_timeout = rsp_buf->timeout; |
| 1977 | handle->msglen = rsp_buf->msglen; |
| 1978 | |
| 1979 | if (!atomic_read(&handle->hdcp_off)) |
| 1980 | hdcp_lib_send_message(handle); |
| 1981 | exit: |
| 1982 | kzfree(msg); |
| 1983 | |
| 1984 | hdcp_lib_wakeup_client(handle, &cdata); |
| 1985 | |
| 1986 | if (rc && !atomic_read(&handle->hdcp_off)) |
| 1987 | HDCP_LIB_EXECUTE(clean); |
| 1988 | } |
| 1989 | |
| 1990 | static void hdcp_lib_msg_recvd_work(struct kthread_work *work) |
| 1991 | { |
| 1992 | struct hdcp_lib_handle *handle = container_of(work, |
| 1993 | struct hdcp_lib_handle, |
| 1994 | wk_msg_recvd); |
| 1995 | |
| 1996 | hdcp_lib_msg_recvd(handle); |
| 1997 | } |
| 1998 | |
| 1999 | static void hdcp_lib_wait_work(struct kthread_work *work) |
| 2000 | { |
| 2001 | u32 timeout; |
| 2002 | struct hdcp_lib_handle *handle = container_of(work, |
| 2003 | struct hdcp_lib_handle, wk_wait); |
| 2004 | |
| 2005 | if (!handle) { |
| 2006 | pr_err("invalid input\n"); |
| 2007 | return; |
| 2008 | } |
| 2009 | |
| 2010 | if (atomic_read(&handle->hdcp_off)) { |
| 2011 | pr_debug("invalid state: hdcp off\n"); |
| 2012 | return; |
| 2013 | } |
| 2014 | |
| 2015 | if (handle->hdcp_state & HDCP_STATE_ERROR) { |
| 2016 | pr_debug("invalid state: hdcp error\n"); |
| 2017 | return; |
| 2018 | } |
| 2019 | |
| 2020 | reinit_completion(&handle->poll_wait); |
| 2021 | timeout = wait_for_completion_timeout(&handle->poll_wait, |
| 2022 | handle->wait_timeout); |
| 2023 | if (!timeout) { |
| 2024 | pr_err("wait timeout\n"); |
| 2025 | |
| 2026 | if (!atomic_read(&handle->hdcp_off)) |
| 2027 | HDCP_LIB_EXECUTE(clean); |
| 2028 | } |
| 2029 | |
| 2030 | handle->wait_timeout = 0; |
| 2031 | } |
| 2032 | |
| 2033 | bool hdcp1_check_if_supported_load_app(void) |
| 2034 | { |
| 2035 | int rc = 0; |
| 2036 | |
| 2037 | /* start hdcp1 app */ |
| 2038 | if (hdcp1_supported && !hdcp1_handle) { |
| 2039 | rc = qseecom_start_app(&hdcp1_handle, HDCP1_APP_NAME, |
| 2040 | QSEECOM_SBUFF_SIZE); |
| 2041 | if (rc) { |
| 2042 | pr_err("qseecom_start_app failed %d\n", rc); |
| 2043 | hdcp1_supported = false; |
| 2044 | } else { |
| 2045 | mutex_init(&hdcp1_ta_cmd_lock); |
| 2046 | } |
| 2047 | } |
| 2048 | |
| 2049 | pr_debug("hdcp1 app %s loaded\n", |
| 2050 | hdcp1_supported ? "successfully" : "not"); |
| 2051 | |
| 2052 | return hdcp1_supported; |
| 2053 | } |
| 2054 | |
| 2055 | /* APIs exposed to all clients */ |
| 2056 | int hdcp1_set_keys(uint32_t *aksv_msb, uint32_t *aksv_lsb) |
| 2057 | { |
| 2058 | int rc = 0; |
| 2059 | struct hdcp1_key_set_req *key_set_req; |
| 2060 | struct hdcp1_key_set_rsp *key_set_rsp; |
| 2061 | |
| 2062 | if (aksv_msb == NULL || aksv_lsb == NULL) |
| 2063 | return -EINVAL; |
| 2064 | |
| 2065 | if (!hdcp1_supported || !hdcp1_handle) |
| 2066 | return -EINVAL; |
| 2067 | |
| 2068 | /* set keys and request aksv */ |
| 2069 | key_set_req = (struct hdcp1_key_set_req *)hdcp1_handle->sbuf; |
| 2070 | key_set_req->commandid = HDCP1_SET_KEY_MESSAGE_ID; |
| 2071 | key_set_rsp = (struct hdcp1_key_set_rsp *)(hdcp1_handle->sbuf + |
| 2072 | QSEECOM_ALIGN(sizeof(struct hdcp1_key_set_req))); |
| 2073 | rc = qseecom_send_command(hdcp1_handle, key_set_req, |
| 2074 | QSEECOM_ALIGN(sizeof |
| 2075 | (struct hdcp1_key_set_req)), |
| 2076 | key_set_rsp, |
| 2077 | QSEECOM_ALIGN(sizeof |
| 2078 | (struct hdcp1_key_set_rsp))); |
| 2079 | |
| 2080 | if (rc < 0) { |
| 2081 | pr_err("qseecom cmd failed err=%d\n", rc); |
| 2082 | return -ENOKEY; |
| 2083 | } |
| 2084 | |
| 2085 | rc = key_set_rsp->ret; |
| 2086 | if (rc) { |
| 2087 | pr_err("set key cmd failed, rsp=%d\n", key_set_rsp->ret); |
| 2088 | return -ENOKEY; |
| 2089 | } |
| 2090 | |
| 2091 | /* copy bytes into msb and lsb */ |
| 2092 | *aksv_msb = key_set_rsp->ksv[0] << 24; |
| 2093 | *aksv_msb |= key_set_rsp->ksv[1] << 16; |
| 2094 | *aksv_msb |= key_set_rsp->ksv[2] << 8; |
| 2095 | *aksv_msb |= key_set_rsp->ksv[3]; |
| 2096 | *aksv_lsb = key_set_rsp->ksv[4] << 24; |
| 2097 | *aksv_lsb |= key_set_rsp->ksv[5] << 16; |
| 2098 | *aksv_lsb |= key_set_rsp->ksv[6] << 8; |
| 2099 | *aksv_lsb |= key_set_rsp->ksv[7]; |
| 2100 | |
| 2101 | return 0; |
| 2102 | } |
| 2103 | |
| 2104 | int hdcp1_set_enc(bool enable) |
| 2105 | { |
| 2106 | int rc = 0; |
| 2107 | struct hdcp1_set_enc_req *set_enc_req; |
| 2108 | struct hdcp1_set_enc_rsp *set_enc_rsp; |
| 2109 | |
| 2110 | mutex_lock(&hdcp1_ta_cmd_lock); |
| 2111 | |
| 2112 | if (!hdcp1_supported || !hdcp1_handle) { |
| 2113 | rc = -EINVAL; |
| 2114 | goto end; |
| 2115 | } |
| 2116 | |
| 2117 | if (hdcp1_enc_enabled == enable) { |
| 2118 | pr_info("already %s\n", enable ? "enabled" : "disabled"); |
| 2119 | goto end; |
| 2120 | } |
| 2121 | |
| 2122 | /* set keys and request aksv */ |
| 2123 | set_enc_req = (struct hdcp1_set_enc_req *)hdcp1_handle->sbuf; |
| 2124 | set_enc_req->commandid = HDCP1_SET_ENC_MESSAGE_ID; |
| 2125 | set_enc_req->enable = enable; |
| 2126 | set_enc_rsp = (struct hdcp1_set_enc_rsp *)(hdcp1_handle->sbuf + |
| 2127 | QSEECOM_ALIGN(sizeof(struct hdcp1_set_enc_req))); |
| 2128 | rc = qseecom_send_command(hdcp1_handle, set_enc_req, |
| 2129 | QSEECOM_ALIGN(sizeof |
| 2130 | (struct hdcp1_set_enc_req)), |
| 2131 | set_enc_rsp, |
| 2132 | QSEECOM_ALIGN(sizeof |
| 2133 | (struct hdcp1_set_enc_rsp))); |
| 2134 | |
| 2135 | if (rc < 0) { |
| 2136 | pr_err("qseecom cmd failed err=%d\n", rc); |
| 2137 | goto end; |
| 2138 | } |
| 2139 | |
| 2140 | rc = set_enc_rsp->ret; |
| 2141 | if (rc) { |
| 2142 | pr_err("enc cmd failed, rsp=%d\n", set_enc_rsp->ret); |
| 2143 | rc = -EINVAL; |
| 2144 | goto end; |
| 2145 | } |
| 2146 | |
| 2147 | hdcp1_enc_enabled = enable; |
| 2148 | pr_info("%s success\n", enable ? "enable" : "disable"); |
| 2149 | end: |
| 2150 | mutex_unlock(&hdcp1_ta_cmd_lock); |
| 2151 | return rc; |
| 2152 | } |
| 2153 | |
| 2154 | int hdcp_library_register(struct hdcp_register_data *data) |
| 2155 | { |
| 2156 | int rc = 0; |
| 2157 | struct hdcp_lib_handle *handle = NULL; |
| 2158 | |
| 2159 | if (!data) { |
| 2160 | pr_err("invalid input\n"); |
| 2161 | return -EINVAL; |
| 2162 | } |
| 2163 | |
| 2164 | if (!data->txmtr_ops) { |
| 2165 | pr_err("invalid input: txmtr context\n"); |
| 2166 | return -EINVAL; |
| 2167 | } |
| 2168 | |
| 2169 | if (!data->client_ops) { |
| 2170 | pr_err("invalid input: client_ops\n"); |
| 2171 | return -EINVAL; |
| 2172 | } |
| 2173 | |
| 2174 | if (!data->hdcp_ctx) { |
| 2175 | pr_err("invalid input: hdcp_ctx\n"); |
| 2176 | return -EINVAL; |
| 2177 | } |
| 2178 | |
| 2179 | /* populate ops to be called by client */ |
| 2180 | data->txmtr_ops->feature_supported = hdcp_lib_client_feature_supported; |
| 2181 | data->txmtr_ops->wakeup = hdcp_lib_wakeup_thread; |
| 2182 | |
| 2183 | handle = kzalloc(sizeof(*handle), GFP_KERNEL); |
| 2184 | if (!handle) { |
| 2185 | rc = -ENOMEM; |
| 2186 | goto unlock; |
| 2187 | } |
| 2188 | |
| 2189 | handle->client_ctx = data->client_ctx; |
| 2190 | handle->client_ops = data->client_ops; |
| 2191 | handle->hdcp_app_init = NULL; |
| 2192 | handle->hdcp_txmtr_init = NULL; |
| 2193 | handle->device_type = data->device_type; |
| 2194 | |
| 2195 | atomic_set(&handle->hdcp_off, 0); |
| 2196 | |
| 2197 | mutex_init(&handle->msg_lock); |
| 2198 | mutex_init(&handle->wakeup_mutex); |
| 2199 | |
| 2200 | kthread_init_worker(&handle->worker); |
| 2201 | |
| 2202 | kthread_init_work(&handle->wk_init, hdcp_lib_init_work); |
| 2203 | kthread_init_work(&handle->wk_msg_sent, hdcp_lib_msg_sent_work); |
| 2204 | kthread_init_work(&handle->wk_msg_recvd, hdcp_lib_msg_recvd_work); |
| 2205 | kthread_init_work(&handle->wk_timeout, hdcp_lib_manage_timeout_work); |
| 2206 | kthread_init_work(&handle->wk_clean, hdcp_lib_cleanup_work); |
| 2207 | kthread_init_work(&handle->wk_wait, hdcp_lib_wait_work); |
| 2208 | kthread_init_work(&handle->wk_stream, hdcp_lib_query_stream_work); |
| 2209 | |
| 2210 | init_completion(&handle->poll_wait); |
| 2211 | |
| 2212 | handle->listener_buf = kzalloc(MAX_TX_MESSAGE_SIZE, GFP_KERNEL); |
| 2213 | if (!(handle->listener_buf)) { |
| 2214 | rc = -ENOMEM; |
| 2215 | goto error; |
| 2216 | } |
| 2217 | |
| 2218 | *data->hdcp_ctx = handle; |
| 2219 | /* Cache the client ctx to be used later |
| 2220 | * HDCP driver probe happens earlier than |
| 2221 | * SDE driver probe hence caching it to |
| 2222 | * be used later. |
| 2223 | */ |
| 2224 | |
| 2225 | drv_client_handle = handle; |
| 2226 | handle->thread = kthread_run(kthread_worker_fn, |
| 2227 | &handle->worker, "hdcp_tz_lib"); |
| 2228 | |
| 2229 | if (IS_ERR(handle->thread)) { |
| 2230 | pr_err("unable to start lib thread\n"); |
| 2231 | rc = PTR_ERR(handle->thread); |
| 2232 | handle->thread = NULL; |
| 2233 | goto error; |
| 2234 | } |
| 2235 | |
| 2236 | return 0; |
| 2237 | error: |
| 2238 | kzfree(handle->listener_buf); |
| 2239 | handle->listener_buf = NULL; |
| 2240 | kzfree(handle); |
| 2241 | handle = NULL; |
| 2242 | unlock: |
| 2243 | return rc; |
| 2244 | } |
| 2245 | EXPORT_SYMBOL(hdcp_library_register); |
| 2246 | |
| 2247 | void hdcp_library_deregister(void *phdcpcontext) |
| 2248 | { |
| 2249 | struct hdcp_lib_handle *handle = phdcpcontext; |
| 2250 | |
| 2251 | if (!handle) |
| 2252 | return; |
| 2253 | |
| 2254 | kthread_stop(handle->thread); |
| 2255 | |
| 2256 | kzfree(handle->qseecom_handle); |
| 2257 | kzfree(handle->last_msg_recvd_buf); |
| 2258 | |
| 2259 | mutex_destroy(&handle->wakeup_mutex); |
| 2260 | |
| 2261 | kzfree(handle->listener_buf); |
| 2262 | kzfree(handle); |
| 2263 | } |
| 2264 | EXPORT_SYMBOL(hdcp_library_deregister); |
| 2265 | |
| 2266 | void hdcp1_notify_topology(void) |
| 2267 | { |
| 2268 | char *envp[4]; |
| 2269 | char *a; |
| 2270 | char *b; |
| 2271 | |
| 2272 | if (!hdcp_drv_mgr) { |
| 2273 | pr_err("invalid input\n"); |
| 2274 | return; |
| 2275 | } |
| 2276 | |
| 2277 | a = kzalloc(SZ_16, GFP_KERNEL); |
| 2278 | |
| 2279 | if (!a) |
| 2280 | return; |
| 2281 | |
| 2282 | b = kzalloc(SZ_16, GFP_KERNEL); |
| 2283 | |
| 2284 | if (!b) { |
| 2285 | kfree(a); |
| 2286 | return; |
| 2287 | } |
| 2288 | |
| 2289 | envp[0] = "HDCP_MGR_EVENT=MSG_READY"; |
| 2290 | envp[1] = a; |
| 2291 | envp[2] = b; |
| 2292 | envp[3] = NULL; |
| 2293 | |
| 2294 | snprintf(envp[1], 16, "%d", (int)DOWN_CHECK_TOPOLOGY); |
| 2295 | snprintf(envp[2], 16, "%d", (int)HDCP_V1_TX); |
| 2296 | |
| 2297 | kobject_uevent_env(&hdcp_drv_mgr->device->kobj, KOBJ_CHANGE, envp); |
| 2298 | kfree(a); |
| 2299 | kfree(b); |
| 2300 | } |
| 2301 | |
| 2302 | static ssize_t msm_hdcp_1x_sysfs_rda_tp(struct device *dev, |
| 2303 | struct device_attribute *attr, char *buf) |
| 2304 | { |
| 2305 | ssize_t ret = 0; |
| 2306 | |
| 2307 | if (!hdcp_drv_mgr) { |
| 2308 | pr_err("invalid input\n"); |
| 2309 | return -EINVAL; |
| 2310 | } |
| 2311 | |
| 2312 | switch (hdcp_drv_mgr->tp_msgid) { |
| 2313 | case DOWN_CHECK_TOPOLOGY: |
| 2314 | case DOWN_REQUEST_TOPOLOGY: |
| 2315 | buf[MSG_ID_IDX] = hdcp_drv_mgr->tp_msgid; |
| 2316 | buf[RET_CODE_IDX] = HDCP_AUTHED; |
| 2317 | ret = HEADER_LEN; |
| 2318 | |
| 2319 | memcpy(buf + HEADER_LEN, &hdcp_drv_mgr->cached_tp, |
| 2320 | sizeof(struct HDCP_V2V1_MSG_TOPOLOGY)); |
| 2321 | |
| 2322 | ret += sizeof(struct HDCP_V2V1_MSG_TOPOLOGY); |
| 2323 | |
| 2324 | /* clear the flag once data is read back to user space*/ |
| 2325 | hdcp_drv_mgr->tp_msgid = -1; |
| 2326 | break; |
| 2327 | default: |
| 2328 | ret = -EINVAL; |
| 2329 | } |
| 2330 | |
| 2331 | return ret; |
| 2332 | } |
| 2333 | |
| 2334 | static ssize_t msm_hdcp_1x_sysfs_wta_tp(struct device *dev, |
| 2335 | struct device_attribute *attr, const char *buf, size_t count) |
| 2336 | { |
| 2337 | int msgid = 0; |
| 2338 | ssize_t ret = count; |
| 2339 | |
| 2340 | if (!hdcp_drv_mgr || !buf) { |
| 2341 | pr_err("invalid input\n"); |
| 2342 | return -EINVAL; |
| 2343 | } |
| 2344 | |
| 2345 | msgid = buf[0]; |
| 2346 | |
| 2347 | switch (msgid) { |
| 2348 | case DOWN_CHECK_TOPOLOGY: |
| 2349 | case DOWN_REQUEST_TOPOLOGY: |
| 2350 | hdcp_drv_mgr->tp_msgid = msgid; |
| 2351 | break; |
| 2352 | /* more cases added here */ |
| 2353 | default: |
| 2354 | ret = -EINVAL; |
| 2355 | } |
| 2356 | |
| 2357 | return ret; |
| 2358 | } |
| 2359 | |
| 2360 | static ssize_t hdcp2p2_sysfs_wta_min_level_change(struct device *dev, |
| 2361 | struct device_attribute *attr, const char *buf, size_t count) |
| 2362 | { |
| 2363 | int rc; |
| 2364 | int min_enc_lvl; |
| 2365 | struct hdcp_lib_handle *handle; |
| 2366 | ssize_t ret = count; |
| 2367 | |
| 2368 | if (!hdcp_drv_mgr) { |
| 2369 | pr_err("invalid input\n"); |
| 2370 | return -EINVAL; |
| 2371 | } |
| 2372 | |
| 2373 | handle = hdcp_drv_mgr->handle; |
| 2374 | |
| 2375 | rc = kstrtoint(buf, 10, &min_enc_lvl); |
| 2376 | if (rc) { |
| 2377 | pr_err("%s: kstrtoint failed. rc=%d\n", __func__, rc); |
| 2378 | return -EINVAL; |
| 2379 | } |
| 2380 | |
| 2381 | if (handle && handle->client_ops->notify_lvl_change) { |
| 2382 | handle->client_ops->notify_lvl_change(handle->client_ctx, |
| 2383 | min_enc_lvl); |
| 2384 | } |
| 2385 | |
| 2386 | return ret; |
| 2387 | } |
| 2388 | |
| 2389 | static DEVICE_ATTR(tp, 0644, msm_hdcp_1x_sysfs_rda_tp, |
| 2390 | msm_hdcp_1x_sysfs_wta_tp); |
| 2391 | |
| 2392 | static DEVICE_ATTR(min_level_change, 0200, NULL, |
| 2393 | hdcp2p2_sysfs_wta_min_level_change); |
| 2394 | |
| 2395 | void hdcp1_cache_repeater_topology(void *hdcp1_cached_tp) |
| 2396 | { |
| 2397 | if (!hdcp_drv_mgr) { |
| 2398 | pr_err("invalid input\n"); |
| 2399 | return; |
| 2400 | } |
| 2401 | |
| 2402 | memcpy((void *)&hdcp_drv_mgr->cached_tp, |
| 2403 | hdcp1_cached_tp, |
| 2404 | sizeof(struct HDCP_V2V1_MSG_TOPOLOGY)); |
| 2405 | } |
| 2406 | |
| 2407 | static struct attribute *msm_hdcp_fs_attrs[] = { |
| 2408 | &dev_attr_tp.attr, |
| 2409 | &dev_attr_min_level_change.attr, |
| 2410 | NULL |
| 2411 | }; |
| 2412 | |
| 2413 | static struct attribute_group msm_hdcp_fs_attr_group = { |
| 2414 | .attrs = msm_hdcp_fs_attrs |
| 2415 | }; |
| 2416 | |
| 2417 | static int msm_hdcp_open(struct inode *inode, struct file *file) |
| 2418 | { |
| 2419 | return 0; |
| 2420 | } |
| 2421 | |
| 2422 | static int msm_hdcp_close(struct inode *inode, struct file *file) |
| 2423 | { |
| 2424 | return 0; |
| 2425 | } |
| 2426 | |
| 2427 | static const struct file_operations msm_hdcp_fops = { |
| 2428 | .owner = THIS_MODULE, |
| 2429 | .open = msm_hdcp_open, |
| 2430 | .release = msm_hdcp_close, |
| 2431 | }; |
| 2432 | |
| 2433 | static const struct of_device_id msm_hdcp_dt_match[] = { |
| 2434 | { .compatible = "qcom,msm-hdcp",}, |
| 2435 | {} |
| 2436 | }; |
| 2437 | |
| 2438 | MODULE_DEVICE_TABLE(of, msm_hdcp_dt_match); |
| 2439 | |
| 2440 | static int msm_hdcp_probe(struct platform_device *pdev) |
| 2441 | { |
| 2442 | int ret; |
| 2443 | |
| 2444 | hdcp_drv_mgr = devm_kzalloc(&pdev->dev, sizeof(struct msm_hdcp_mgr), |
| 2445 | GFP_KERNEL); |
| 2446 | if (!hdcp_drv_mgr) |
| 2447 | return -ENOMEM; |
| 2448 | |
| 2449 | hdcp_drv_mgr->pdev = pdev; |
| 2450 | |
| 2451 | platform_set_drvdata(pdev, hdcp_drv_mgr); |
| 2452 | |
| 2453 | ret = alloc_chrdev_region(&hdcp_drv_mgr->dev_num, 0, 1, DRIVER_NAME); |
| 2454 | if (ret < 0) { |
| 2455 | pr_err("alloc_chrdev_region failed ret = %d\n", ret); |
| 2456 | goto error_get_dev_num; |
| 2457 | } |
| 2458 | |
| 2459 | hdcp_drv_mgr->class = class_create(THIS_MODULE, CLASS_NAME); |
| 2460 | if (IS_ERR(hdcp_drv_mgr->class)) { |
| 2461 | ret = PTR_ERR(hdcp_drv_mgr->class); |
| 2462 | pr_err("couldn't create class rc = %d\n", ret); |
| 2463 | goto error_class_create; |
| 2464 | } |
| 2465 | |
| 2466 | hdcp_drv_mgr->device = device_create(hdcp_drv_mgr->class, NULL, |
| 2467 | hdcp_drv_mgr->dev_num, NULL, DRIVER_NAME); |
| 2468 | if (IS_ERR(hdcp_drv_mgr->device)) { |
| 2469 | ret = PTR_ERR(hdcp_drv_mgr->device); |
| 2470 | pr_err("device_create failed %d\n", ret); |
| 2471 | goto error_class_device_create; |
| 2472 | } |
| 2473 | |
| 2474 | cdev_init(&hdcp_drv_mgr->cdev, &msm_hdcp_fops); |
| 2475 | ret = cdev_add(&hdcp_drv_mgr->cdev, |
| 2476 | MKDEV(MAJOR(hdcp_drv_mgr->dev_num), 0), 1); |
| 2477 | if (ret < 0) { |
| 2478 | pr_err("cdev_add failed %d\n", ret); |
| 2479 | goto error_cdev_add; |
| 2480 | } |
| 2481 | |
| 2482 | ret = sysfs_create_group(&hdcp_drv_mgr->device->kobj, |
| 2483 | &msm_hdcp_fs_attr_group); |
| 2484 | if (ret) |
| 2485 | pr_err("unable to register rotator sysfs nodes\n"); |
| 2486 | |
| 2487 | /* Store the handle in the hdcp drv mgr |
| 2488 | * to be used for the sysfs notifications |
| 2489 | */ |
| 2490 | hdcp_drv_mgr->handle = drv_client_handle; |
| 2491 | |
| 2492 | return 0; |
| 2493 | error_cdev_add: |
| 2494 | device_destroy(hdcp_drv_mgr->class, hdcp_drv_mgr->dev_num); |
| 2495 | error_class_device_create: |
| 2496 | class_destroy(hdcp_drv_mgr->class); |
| 2497 | error_class_create: |
| 2498 | unregister_chrdev_region(hdcp_drv_mgr->dev_num, 1); |
| 2499 | error_get_dev_num: |
| 2500 | devm_kfree(&pdev->dev, hdcp_drv_mgr); |
| 2501 | hdcp_drv_mgr = NULL; |
| 2502 | return ret; |
| 2503 | } |
| 2504 | |
| 2505 | static int msm_hdcp_remove(struct platform_device *pdev) |
| 2506 | { |
| 2507 | struct msm_hdcp_mgr *mgr; |
| 2508 | |
| 2509 | mgr = (struct msm_hdcp_mgr *)platform_get_drvdata(pdev); |
| 2510 | if (!mgr) |
| 2511 | return -ENODEV; |
| 2512 | |
| 2513 | sysfs_remove_group(&hdcp_drv_mgr->device->kobj, |
| 2514 | &msm_hdcp_fs_attr_group); |
| 2515 | cdev_del(&hdcp_drv_mgr->cdev); |
| 2516 | device_destroy(hdcp_drv_mgr->class, hdcp_drv_mgr->dev_num); |
| 2517 | class_destroy(hdcp_drv_mgr->class); |
| 2518 | unregister_chrdev_region(hdcp_drv_mgr->dev_num, 1); |
| 2519 | |
| 2520 | devm_kfree(&pdev->dev, hdcp_drv_mgr); |
| 2521 | hdcp_drv_mgr = NULL; |
| 2522 | return 0; |
| 2523 | } |
| 2524 | |
| 2525 | static struct platform_driver msm_hdcp_driver = { |
| 2526 | .probe = msm_hdcp_probe, |
| 2527 | .remove = msm_hdcp_remove, |
| 2528 | .driver = { |
| 2529 | .name = "msm_hdcp", |
| 2530 | .of_match_table = msm_hdcp_dt_match, |
| 2531 | .pm = NULL, |
| 2532 | } |
| 2533 | }; |
| 2534 | |
| 2535 | static int __init msm_hdcp_init(void) |
| 2536 | { |
| 2537 | return platform_driver_register(&msm_hdcp_driver); |
| 2538 | } |
| 2539 | |
| 2540 | static void __exit msm_hdcp_exit(void) |
| 2541 | { |
| 2542 | return platform_driver_unregister(&msm_hdcp_driver); |
| 2543 | } |
| 2544 | |
| 2545 | module_init(msm_hdcp_init); |
| 2546 | module_exit(msm_hdcp_exit); |
| 2547 | |
| 2548 | MODULE_DESCRIPTION("MSM HDCP driver"); |
| 2549 | MODULE_LICENSE("GPL v2"); |