Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2010-2018, 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 | #include <linux/io.h> |
| 14 | #include <linux/list.h> |
| 15 | #include <linux/types.h> |
| 16 | #include <linux/stat.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/device.h> |
| 19 | #include <linux/input.h> |
| 20 | |
| 21 | #include "mdss_hdmi_cec.h" |
| 22 | #include "mdss_panel.h" |
| 23 | |
| 24 | #define CEC_STATUS_WR_ERROR BIT(0) |
| 25 | #define CEC_STATUS_WR_DONE BIT(1) |
| 26 | #define CEC_INTR (BIT(1) | BIT(3) | BIT(7)) |
| 27 | |
| 28 | #define CEC_SUPPORTED_HW_VERSION 0x30000001 |
| 29 | |
| 30 | /* Reference: HDMI 1.4a Specification section 7.1 */ |
| 31 | |
| 32 | #define CEC_OP_SET_STREAM_PATH 0x86 |
| 33 | #define CEC_OP_KEY_PRESS 0x44 |
| 34 | #define CEC_OP_STANDBY 0x36 |
| 35 | |
| 36 | struct hdmi_cec_ctrl { |
| 37 | bool cec_enabled; |
| 38 | bool cec_wakeup_en; |
| 39 | bool cec_device_suspend; |
| 40 | |
| 41 | u32 cec_msg_wr_status; |
| 42 | spinlock_t lock; |
| 43 | struct work_struct cec_read_work; |
| 44 | struct completion cec_msg_wr_done; |
| 45 | struct hdmi_cec_init_data init_data; |
| 46 | struct input_dev *input; |
| 47 | }; |
| 48 | |
| 49 | static int hdmi_cec_msg_send(void *data, struct cec_msg *msg) |
| 50 | { |
| 51 | int i, line_check_retry = 10, rc = 0; |
| 52 | u32 frame_retransmit = RETRANSMIT_MAX_NUM; |
| 53 | bool frame_type; |
| 54 | unsigned long flags; |
Sachin Bhayare | 5076e25 | 2018-01-18 14:56:45 +0530 | [diff] [blame] | 55 | struct mdss_io_data *io = NULL; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 56 | struct hdmi_cec_ctrl *cec_ctrl = (struct hdmi_cec_ctrl *)data; |
| 57 | |
| 58 | if (!cec_ctrl || !cec_ctrl->init_data.io || !msg) { |
| 59 | DEV_ERR("%s: Invalid input\n", __func__); |
| 60 | return -EINVAL; |
| 61 | } |
| 62 | |
| 63 | io = cec_ctrl->init_data.io; |
| 64 | |
| 65 | reinit_completion(&cec_ctrl->cec_msg_wr_done); |
| 66 | cec_ctrl->cec_msg_wr_status = 0; |
| 67 | frame_type = (msg->recvr_id == 15 ? BIT(0) : 0); |
| 68 | if (msg->retransmit > 0 && msg->retransmit < RETRANSMIT_MAX_NUM) |
| 69 | frame_retransmit = msg->retransmit; |
| 70 | |
| 71 | /* toggle cec in order to flush out bad hw state, if any */ |
| 72 | DSS_REG_W(io, HDMI_CEC_CTRL, 0); |
| 73 | DSS_REG_W(io, HDMI_CEC_CTRL, BIT(0)); |
| 74 | |
| 75 | frame_retransmit = (frame_retransmit & 0xF) << 4; |
| 76 | DSS_REG_W(io, HDMI_CEC_RETRANSMIT, BIT(0) | frame_retransmit); |
| 77 | |
| 78 | /* header block */ |
| 79 | DSS_REG_W_ND(io, HDMI_CEC_WR_DATA, |
| 80 | (((msg->sender_id << 4) | msg->recvr_id) << 8) | frame_type); |
| 81 | |
| 82 | /* data block 0 : opcode */ |
| 83 | DSS_REG_W_ND(io, HDMI_CEC_WR_DATA, |
| 84 | ((msg->frame_size < 2 ? 0 : msg->opcode) << 8) | frame_type); |
| 85 | |
| 86 | /* data block 1-14 : operand 0-13 */ |
| 87 | for (i = 0; i < msg->frame_size - 2; i++) |
| 88 | DSS_REG_W_ND(io, HDMI_CEC_WR_DATA, |
| 89 | (msg->operand[i] << 8) | frame_type); |
| 90 | |
| 91 | while ((DSS_REG_R(io, HDMI_CEC_STATUS) & BIT(0)) && |
| 92 | line_check_retry) { |
| 93 | line_check_retry--; |
| 94 | DEV_DBG("%s: CEC line is busy(%d)\n", __func__, |
| 95 | line_check_retry); |
| 96 | schedule(); |
| 97 | } |
| 98 | |
| 99 | if (!line_check_retry && (DSS_REG_R(io, HDMI_CEC_STATUS) & BIT(0))) { |
| 100 | DEV_ERR("%s: CEC line is busy. Retry\n", __func__); |
| 101 | return -EAGAIN; |
| 102 | } |
| 103 | |
| 104 | /* start transmission */ |
| 105 | DSS_REG_W(io, HDMI_CEC_CTRL, BIT(0) | BIT(1) | |
| 106 | ((msg->frame_size & 0x1F) << 4) | BIT(9)); |
| 107 | |
| 108 | if (!wait_for_completion_timeout( |
| 109 | &cec_ctrl->cec_msg_wr_done, HZ)) { |
| 110 | DEV_ERR("%s: timedout", __func__); |
| 111 | return -ETIMEDOUT; |
| 112 | } |
| 113 | |
| 114 | spin_lock_irqsave(&cec_ctrl->lock, flags); |
| 115 | if (cec_ctrl->cec_msg_wr_status == CEC_STATUS_WR_ERROR) { |
| 116 | rc = -ENXIO; |
| 117 | DEV_ERR("%s: msg write failed.\n", __func__); |
| 118 | } else { |
| 119 | DEV_DBG("%s: CEC write frame done (frame len=%d)", __func__, |
| 120 | msg->frame_size); |
| 121 | } |
| 122 | spin_unlock_irqrestore(&cec_ctrl->lock, flags); |
| 123 | |
| 124 | return rc; |
| 125 | } /* hdmi_cec_msg_send */ |
| 126 | |
| 127 | static void hdmi_cec_init_input_event(struct hdmi_cec_ctrl *cec_ctrl) |
| 128 | { |
| 129 | int rc = 0; |
| 130 | |
| 131 | if (!cec_ctrl) { |
| 132 | DEV_ERR("%s: Invalid input\n", __func__); |
| 133 | return; |
| 134 | } |
| 135 | |
| 136 | /* Initialize CEC input events */ |
| 137 | if (!cec_ctrl->input) |
| 138 | cec_ctrl->input = input_allocate_device(); |
| 139 | if (!cec_ctrl->input) { |
| 140 | DEV_ERR("%s: hdmi input device allocation failed\n", __func__); |
| 141 | return; |
| 142 | } |
| 143 | |
| 144 | cec_ctrl->input->name = "HDMI CEC User or Deck Control"; |
| 145 | cec_ctrl->input->phys = "hdmi/input0"; |
| 146 | cec_ctrl->input->id.bustype = BUS_VIRTUAL; |
| 147 | |
| 148 | input_set_capability(cec_ctrl->input, EV_KEY, KEY_POWER); |
| 149 | |
| 150 | rc = input_register_device(cec_ctrl->input); |
| 151 | if (rc) { |
| 152 | DEV_ERR("%s: cec input device registeration failed\n", |
| 153 | __func__); |
| 154 | input_free_device(cec_ctrl->input); |
| 155 | cec_ctrl->input = NULL; |
| 156 | return; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | static void hdmi_cec_deinit_input_event(struct hdmi_cec_ctrl *cec_ctrl) |
| 161 | { |
| 162 | if (cec_ctrl->input) |
| 163 | input_unregister_device(cec_ctrl->input); |
| 164 | cec_ctrl->input = NULL; |
| 165 | } |
| 166 | |
| 167 | static void hdmi_cec_msg_recv(struct work_struct *work) |
| 168 | { |
| 169 | int i; |
| 170 | u32 data; |
| 171 | struct hdmi_cec_ctrl *cec_ctrl = NULL; |
Sachin Bhayare | 5076e25 | 2018-01-18 14:56:45 +0530 | [diff] [blame] | 172 | struct mdss_io_data *io = NULL; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 173 | struct cec_msg msg; |
| 174 | struct cec_cbs *cbs; |
| 175 | |
| 176 | cec_ctrl = container_of(work, struct hdmi_cec_ctrl, cec_read_work); |
| 177 | if (!cec_ctrl || !cec_ctrl->init_data.io) { |
| 178 | DEV_ERR("%s: invalid input\n", __func__); |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | if (!cec_ctrl->cec_enabled) { |
| 183 | DEV_ERR("%s: cec not enabled\n", __func__); |
| 184 | return; |
| 185 | } |
| 186 | |
| 187 | io = cec_ctrl->init_data.io; |
| 188 | cbs = cec_ctrl->init_data.cbs; |
| 189 | |
| 190 | data = DSS_REG_R(io, HDMI_CEC_RD_DATA); |
| 191 | |
| 192 | msg.recvr_id = (data & 0x000F); |
| 193 | msg.sender_id = (data & 0x00F0) >> 4; |
| 194 | msg.frame_size = (data & 0x1F00) >> 8; |
| 195 | DEV_DBG("%s: Recvd init=[%u] dest=[%u] size=[%u]\n", __func__, |
| 196 | msg.sender_id, msg.recvr_id, |
| 197 | msg.frame_size); |
| 198 | |
| 199 | if (msg.frame_size < 1 || msg.frame_size > MAX_CEC_FRAME_SIZE) { |
| 200 | DEV_ERR("%s: invalid message (frame length = %d)\n", |
| 201 | __func__, msg.frame_size); |
| 202 | return; |
| 203 | } else if (msg.frame_size == 1) { |
| 204 | DEV_DBG("%s: polling message (dest[%x] <- init[%x])\n", |
| 205 | __func__, msg.recvr_id, msg.sender_id); |
| 206 | return; |
| 207 | } |
| 208 | |
| 209 | /* data block 0 : opcode */ |
| 210 | data = DSS_REG_R_ND(io, HDMI_CEC_RD_DATA); |
| 211 | msg.opcode = data & 0xFF; |
| 212 | |
| 213 | /* data block 1-14 : operand 0-13 */ |
| 214 | for (i = 0; i < msg.frame_size - 2; i++) { |
| 215 | data = DSS_REG_R_ND(io, HDMI_CEC_RD_DATA); |
| 216 | msg.operand[i] = data & 0xFF; |
| 217 | } |
| 218 | |
| 219 | for (; i < MAX_OPERAND_SIZE; i++) |
| 220 | msg.operand[i] = 0; |
| 221 | |
| 222 | DEV_DBG("%s: opcode 0x%x, wakup_en %d, device_suspend %d\n", __func__, |
| 223 | msg.opcode, cec_ctrl->cec_wakeup_en, |
| 224 | cec_ctrl->cec_device_suspend); |
| 225 | |
| 226 | if ((msg.opcode == CEC_OP_SET_STREAM_PATH || |
| 227 | msg.opcode == CEC_OP_KEY_PRESS) && |
| 228 | cec_ctrl->input && cec_ctrl->cec_wakeup_en && |
| 229 | cec_ctrl->cec_device_suspend) { |
| 230 | DEV_DBG("%s: Sending power on at wakeup\n", __func__); |
| 231 | input_report_key(cec_ctrl->input, KEY_POWER, 1); |
| 232 | input_sync(cec_ctrl->input); |
| 233 | input_report_key(cec_ctrl->input, KEY_POWER, 0); |
| 234 | input_sync(cec_ctrl->input); |
| 235 | } |
| 236 | |
| 237 | if ((msg.opcode == CEC_OP_STANDBY) && |
| 238 | cec_ctrl->input && cec_ctrl->cec_wakeup_en && |
| 239 | !cec_ctrl->cec_device_suspend) { |
| 240 | DEV_DBG("%s: Sending power off on standby\n", __func__); |
| 241 | input_report_key(cec_ctrl->input, KEY_POWER, 1); |
| 242 | input_sync(cec_ctrl->input); |
| 243 | input_report_key(cec_ctrl->input, KEY_POWER, 0); |
| 244 | input_sync(cec_ctrl->input); |
| 245 | } |
| 246 | |
| 247 | if (cbs && cbs->msg_recv_notify) |
| 248 | cbs->msg_recv_notify(cbs->data, &msg); |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * hdmi_cec_isr() - interrupt handler for cec hw module |
| 253 | * @cec_ctrl: pointer to cec hw module's data |
| 254 | * |
| 255 | * Return: irq error code |
| 256 | * |
| 257 | * The API can be called by HDMI Tx driver on receiving hw interrupts |
| 258 | * to let the CEC related interrupts handled by this module. |
| 259 | */ |
| 260 | int hdmi_cec_isr(void *input) |
| 261 | { |
| 262 | int rc = 0; |
| 263 | u32 cec_intr, cec_status; |
| 264 | unsigned long flags; |
Sachin Bhayare | 5076e25 | 2018-01-18 14:56:45 +0530 | [diff] [blame] | 265 | struct mdss_io_data *io = NULL; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 266 | struct hdmi_cec_ctrl *cec_ctrl = (struct hdmi_cec_ctrl *)input; |
| 267 | |
| 268 | if (!cec_ctrl || !cec_ctrl->init_data.io) { |
| 269 | DEV_ERR("%s: Invalid input\n", __func__); |
| 270 | return -EPERM; |
| 271 | } |
| 272 | |
| 273 | if (!cec_ctrl->cec_enabled) { |
| 274 | DEV_DBG("%s: CEC feature not enabled\n", __func__); |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | io = cec_ctrl->init_data.io; |
| 279 | |
| 280 | cec_intr = DSS_REG_R_ND(io, HDMI_CEC_INT); |
| 281 | |
| 282 | cec_status = DSS_REG_R_ND(io, HDMI_CEC_STATUS); |
| 283 | |
| 284 | if ((cec_intr & BIT(0)) && (cec_intr & BIT(1))) { |
| 285 | DEV_DBG("%s: CEC_IRQ_FRAME_WR_DONE\n", __func__); |
| 286 | DSS_REG_W(io, HDMI_CEC_INT, cec_intr | BIT(0)); |
| 287 | |
| 288 | spin_lock_irqsave(&cec_ctrl->lock, flags); |
| 289 | cec_ctrl->cec_msg_wr_status |= CEC_STATUS_WR_DONE; |
| 290 | spin_unlock_irqrestore(&cec_ctrl->lock, flags); |
| 291 | |
| 292 | if (!completion_done(&cec_ctrl->cec_msg_wr_done)) |
| 293 | complete_all(&cec_ctrl->cec_msg_wr_done); |
| 294 | } |
| 295 | |
| 296 | if ((cec_intr & BIT(2)) && (cec_intr & BIT(3))) { |
| 297 | DEV_DBG("%s: CEC_IRQ_FRAME_ERROR\n", __func__); |
| 298 | DSS_REG_W(io, HDMI_CEC_INT, cec_intr | BIT(2)); |
| 299 | |
| 300 | spin_lock_irqsave(&cec_ctrl->lock, flags); |
| 301 | cec_ctrl->cec_msg_wr_status |= CEC_STATUS_WR_ERROR; |
| 302 | spin_unlock_irqrestore(&cec_ctrl->lock, flags); |
| 303 | |
| 304 | if (!completion_done(&cec_ctrl->cec_msg_wr_done)) |
| 305 | complete_all(&cec_ctrl->cec_msg_wr_done); |
| 306 | } |
| 307 | |
| 308 | if ((cec_intr & BIT(6)) && (cec_intr & BIT(7))) { |
| 309 | DEV_DBG("%s: CEC_IRQ_FRAME_RD_DONE\n", __func__); |
| 310 | |
| 311 | DSS_REG_W(io, HDMI_CEC_INT, cec_intr | BIT(6)); |
| 312 | queue_work(cec_ctrl->init_data.workq, &cec_ctrl->cec_read_work); |
| 313 | } |
| 314 | |
| 315 | return rc; |
| 316 | } |
| 317 | |
| 318 | void hdmi_cec_device_suspend(void *input, bool suspend) |
| 319 | { |
| 320 | struct hdmi_cec_ctrl *cec_ctrl = (struct hdmi_cec_ctrl *)input; |
| 321 | |
| 322 | if (!cec_ctrl) { |
| 323 | DEV_WARN("%s: HDMI CEC HW module not initialized.\n", __func__); |
| 324 | return; |
| 325 | } |
| 326 | |
| 327 | cec_ctrl->cec_device_suspend = suspend; |
| 328 | } |
| 329 | |
| 330 | bool hdmi_cec_is_wakeup_en(void *input) |
| 331 | { |
| 332 | struct hdmi_cec_ctrl *cec_ctrl = (struct hdmi_cec_ctrl *)input; |
| 333 | |
| 334 | if (!cec_ctrl) { |
| 335 | DEV_WARN("%s: HDMI CEC HW module not initialized.\n", __func__); |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | return cec_ctrl->cec_wakeup_en; |
| 340 | } |
| 341 | |
| 342 | static void hdmi_cec_wakeup_en(void *input, bool enable) |
| 343 | { |
| 344 | struct hdmi_cec_ctrl *cec_ctrl = (struct hdmi_cec_ctrl *)input; |
| 345 | |
| 346 | if (!cec_ctrl) { |
| 347 | DEV_ERR("%s: Invalid input\n", __func__); |
| 348 | return; |
| 349 | } |
| 350 | |
| 351 | cec_ctrl->cec_wakeup_en = enable; |
| 352 | } |
| 353 | |
| 354 | static void hdmi_cec_write_logical_addr(void *input, u8 addr) |
| 355 | { |
| 356 | struct hdmi_cec_ctrl *cec_ctrl = (struct hdmi_cec_ctrl *)input; |
| 357 | |
| 358 | if (!cec_ctrl || !cec_ctrl->init_data.io) { |
| 359 | DEV_ERR("%s: Invalid input\n", __func__); |
| 360 | return; |
| 361 | } |
| 362 | |
| 363 | if (cec_ctrl->cec_enabled) |
| 364 | DSS_REG_W(cec_ctrl->init_data.io, HDMI_CEC_ADDR, addr & 0xF); |
| 365 | } |
| 366 | |
| 367 | static int hdmi_cec_enable(void *input, bool enable) |
| 368 | { |
| 369 | int ret = 0; |
| 370 | u32 hdmi_hw_version, reg_val; |
Sachin Bhayare | 5076e25 | 2018-01-18 14:56:45 +0530 | [diff] [blame] | 371 | struct mdss_io_data *io = NULL; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 372 | struct hdmi_cec_ctrl *cec_ctrl = (struct hdmi_cec_ctrl *)input; |
| 373 | struct mdss_panel_info *pinfo; |
| 374 | |
| 375 | if (!cec_ctrl || !cec_ctrl->init_data.io) { |
| 376 | DEV_ERR("%s: Invalid input\n", __func__); |
| 377 | ret = -EPERM; |
| 378 | goto end; |
| 379 | } |
| 380 | |
| 381 | io = cec_ctrl->init_data.io; |
| 382 | pinfo = cec_ctrl->init_data.pinfo; |
| 383 | |
| 384 | if (!pinfo) { |
| 385 | DEV_ERR("%s: invalid pinfo\n", __func__); |
| 386 | goto end; |
| 387 | } |
| 388 | |
| 389 | if (enable) { |
| 390 | /* 19.2Mhz * 0.00005 us = 950 = 0x3B6 */ |
| 391 | DSS_REG_W(io, HDMI_CEC_REFTIMER, (0x3B6 & 0xFFF) | BIT(16)); |
| 392 | |
| 393 | hdmi_hw_version = DSS_REG_R(io, HDMI_VERSION); |
| 394 | if (hdmi_hw_version >= CEC_SUPPORTED_HW_VERSION) { |
| 395 | DSS_REG_W(io, HDMI_CEC_RD_RANGE, 0x30AB9888); |
| 396 | DSS_REG_W(io, HDMI_CEC_WR_RANGE, 0x888AA888); |
| 397 | |
| 398 | DSS_REG_W(io, HDMI_CEC_RD_START_RANGE, 0x88888888); |
| 399 | DSS_REG_W(io, HDMI_CEC_RD_TOTAL_RANGE, 0x99); |
| 400 | DSS_REG_W(io, HDMI_CEC_COMPL_CTL, 0xF); |
| 401 | DSS_REG_W(io, HDMI_CEC_WR_CHECK_CONFIG, 0x4); |
| 402 | } else { |
| 403 | DEV_DBG("%s: CEC version %d is not supported.\n", |
| 404 | __func__, hdmi_hw_version); |
| 405 | ret = -EPERM; |
| 406 | goto end; |
| 407 | } |
| 408 | |
| 409 | DSS_REG_W(io, HDMI_CEC_RD_FILTER, BIT(0) | (0x7FF << 4)); |
| 410 | DSS_REG_W(io, HDMI_CEC_TIME, BIT(0) | ((7 * 0x30) << 7)); |
| 411 | |
| 412 | /* Enable CEC interrupts */ |
| 413 | DSS_REG_W(io, HDMI_CEC_INT, CEC_INTR); |
| 414 | |
| 415 | /* Enable Engine */ |
| 416 | DSS_REG_W(io, HDMI_CEC_CTRL, BIT(0)); |
| 417 | } else { |
| 418 | /* Disable Engine */ |
| 419 | DSS_REG_W(io, HDMI_CEC_CTRL, 0); |
| 420 | |
| 421 | /* Disable CEC interrupts */ |
| 422 | reg_val = DSS_REG_R(io, HDMI_CEC_INT); |
| 423 | DSS_REG_W(io, HDMI_CEC_INT, reg_val & ~CEC_INTR); |
| 424 | } |
| 425 | |
| 426 | cec_ctrl->cec_enabled = enable; |
| 427 | end: |
| 428 | return ret; |
| 429 | } |
| 430 | |
| 431 | /** |
| 432 | * hdmi_cec_init() - Initialize the CEC hw module |
| 433 | * @init_data: data needed to initialize the cec hw module |
| 434 | * |
| 435 | * Return: pointer to cec hw modules data that needs to be passed when |
| 436 | * calling cec hw modules API or error code. |
| 437 | * |
| 438 | * The API registers CEC HW modules with the client and provides HW |
| 439 | * specific operations. |
| 440 | */ |
| 441 | void *hdmi_cec_init(struct hdmi_cec_init_data *init_data) |
| 442 | { |
| 443 | struct hdmi_cec_ctrl *cec_ctrl; |
| 444 | struct cec_ops *ops; |
| 445 | int ret = 0; |
| 446 | |
| 447 | if (!init_data) { |
| 448 | DEV_ERR("%s: Invalid input\n", __func__); |
| 449 | ret = -EINVAL; |
| 450 | goto error; |
| 451 | } |
| 452 | |
| 453 | ops = init_data->ops; |
| 454 | if (!ops) { |
| 455 | DEV_ERR("%s: no ops provided\n", __func__); |
| 456 | ret = -EINVAL; |
| 457 | goto error; |
| 458 | } |
| 459 | |
| 460 | cec_ctrl = kzalloc(sizeof(*cec_ctrl), GFP_KERNEL); |
| 461 | if (!cec_ctrl) { |
| 462 | DEV_ERR("%s: FAILED: out of memory\n", __func__); |
| 463 | ret = -EINVAL; |
| 464 | goto error; |
| 465 | } |
| 466 | |
| 467 | /* keep a copy of init data */ |
| 468 | cec_ctrl->init_data = *init_data; |
| 469 | |
| 470 | spin_lock_init(&cec_ctrl->lock); |
| 471 | INIT_WORK(&cec_ctrl->cec_read_work, hdmi_cec_msg_recv); |
| 472 | init_completion(&cec_ctrl->cec_msg_wr_done); |
| 473 | |
| 474 | /* populate hardware specific operations to client */ |
| 475 | ops->send_msg = hdmi_cec_msg_send; |
| 476 | ops->wt_logical_addr = hdmi_cec_write_logical_addr; |
| 477 | ops->enable = hdmi_cec_enable; |
| 478 | ops->data = cec_ctrl; |
| 479 | ops->wakeup_en = hdmi_cec_wakeup_en; |
| 480 | ops->is_wakeup_en = hdmi_cec_is_wakeup_en; |
| 481 | ops->device_suspend = hdmi_cec_device_suspend; |
| 482 | |
| 483 | hdmi_cec_init_input_event(cec_ctrl); |
| 484 | |
| 485 | return cec_ctrl; |
| 486 | error: |
| 487 | return ERR_PTR(ret); |
| 488 | } |
| 489 | |
| 490 | /** |
| 491 | * hdmi_cec_deinit() - de-initialize CEC HW module |
| 492 | * @data: CEC HW module data |
| 493 | * |
| 494 | * This API release all resources allocated. |
| 495 | */ |
| 496 | void hdmi_cec_deinit(void *data) |
| 497 | { |
| 498 | struct hdmi_cec_ctrl *cec_ctrl = (struct hdmi_cec_ctrl *)data; |
| 499 | |
| 500 | if (cec_ctrl) |
| 501 | hdmi_cec_deinit_input_event(cec_ctrl); |
| 502 | |
| 503 | kfree(cec_ctrl); |
| 504 | } |