Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 1 | /* |
Laxminath Kasam | 63f71cc | 2018-03-05 15:56:29 +0530 | [diff] [blame] | 2 | * Copyright (c) 2012-2015, 2017-2018 The Linux Foundation. All rights reserved. |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/fs.h> |
| 18 | #include <linux/cdev.h> |
| 19 | #include <linux/uaccess.h> |
| 20 | #include <linux/device.h> |
| 21 | #include <linux/io.h> |
| 22 | #include <linux/platform_device.h> |
| 23 | #include <linux/avtimer.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/of.h> |
| 26 | #include <linux/wait.h> |
| 27 | #include <linux/sched.h> |
Laxminath Kasam | 63f71cc | 2018-03-05 15:56:29 +0530 | [diff] [blame] | 28 | #if IS_ENABLED(CONFIG_AVTIMER_LEGACY) |
| 29 | #include <media/msmb_isp.h> |
| 30 | #endif |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 31 | #include <ipc/apr.h> |
| 32 | #include <dsp/q6core.h> |
| 33 | |
| 34 | #define DEVICE_NAME "avtimer" |
| 35 | #define TIMEOUT_MS 1000 |
| 36 | #define CORE_CLIENT 1 |
| 37 | #define TEMP_PORT ((CORE_CLIENT << 8) | 0x0001) |
| 38 | #define SSR_WAKETIME 1000 |
| 39 | #define Q6_READY_RETRY 250 |
| 40 | #define Q6_READY_MAX_RETRIES 40 |
| 41 | |
| 42 | #define AVCS_CMD_REMOTE_AVTIMER_VOTE_REQUEST 0x00012914 |
| 43 | #define AVCS_CMD_RSP_REMOTE_AVTIMER_VOTE_REQUEST 0x00012915 |
| 44 | #define AVCS_CMD_REMOTE_AVTIMER_RELEASE_REQUEST 0x00012916 |
| 45 | #define AVTIMER_REG_CNT 2 |
| 46 | |
| 47 | struct adsp_avt_timer { |
| 48 | struct apr_hdr hdr; |
| 49 | union { |
| 50 | char client_name[8]; |
| 51 | u32 avtimer_handle; |
| 52 | }; |
| 53 | } __packed; |
| 54 | |
| 55 | static int major; |
| 56 | |
| 57 | struct avtimer_t { |
| 58 | struct apr_svc *core_handle_q; |
| 59 | struct cdev myc; |
| 60 | struct class *avtimer_class; |
| 61 | struct mutex avtimer_lock; |
| 62 | int avtimer_open_cnt; |
| 63 | struct delayed_work ssr_dwork; |
| 64 | wait_queue_head_t adsp_resp_wait; |
| 65 | int enable_timer_resp_received; |
| 66 | int timer_handle; |
| 67 | void __iomem *p_avtimer_msw; |
| 68 | void __iomem *p_avtimer_lsw; |
| 69 | uint32_t clk_div; |
| 70 | uint32_t clk_mult; |
| 71 | atomic_t adsp_ready; |
| 72 | int num_retries; |
| 73 | }; |
| 74 | |
| 75 | static struct avtimer_t avtimer; |
Laxminath Kasam | 63f71cc | 2018-03-05 15:56:29 +0530 | [diff] [blame] | 76 | static void avcs_set_isp_fptr(bool enable); |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 77 | |
| 78 | static int32_t aprv2_core_fn_q(struct apr_client_data *data, void *priv) |
| 79 | { |
| 80 | uint32_t *payload1; |
| 81 | |
| 82 | if (!data) { |
| 83 | pr_err("%s: Invalid params\n", __func__); |
| 84 | return -EINVAL; |
| 85 | } |
| 86 | pr_debug("%s: core msg: payload len = %u, apr resp opcode = 0x%X\n", |
| 87 | __func__, data->payload_size, data->opcode); |
| 88 | |
| 89 | switch (data->opcode) { |
| 90 | |
| 91 | case APR_BASIC_RSP_RESULT:{ |
| 92 | |
| 93 | if (!data->payload_size) { |
| 94 | pr_err("%s: APR_BASIC_RSP_RESULT No Payload ", |
| 95 | __func__); |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | payload1 = data->payload; |
Ajit Pandey | 6356fbb | 2019-08-26 16:06:51 +0530 | [diff] [blame] | 100 | |
| 101 | if (data->payload_size < 2 * sizeof(uint32_t)) { |
| 102 | pr_err("%s: payload has invalid size %d\n", |
| 103 | __func__, data->payload_size); |
| 104 | return -EINVAL; |
| 105 | } |
| 106 | |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 107 | switch (payload1[0]) { |
| 108 | case AVCS_CMD_REMOTE_AVTIMER_RELEASE_REQUEST: |
| 109 | pr_debug("%s: Cmd = TIMER RELEASE status[0x%x]\n", |
| 110 | __func__, payload1[1]); |
| 111 | break; |
| 112 | default: |
| 113 | pr_err("Invalid cmd rsp[0x%x][0x%x]\n", |
| 114 | payload1[0], payload1[1]); |
| 115 | break; |
| 116 | } |
| 117 | break; |
| 118 | } |
| 119 | |
| 120 | case RESET_EVENTS:{ |
| 121 | pr_debug("%s: Reset event received in AV timer\n", __func__); |
| 122 | apr_reset(avtimer.core_handle_q); |
| 123 | avtimer.core_handle_q = NULL; |
| 124 | avtimer.avtimer_open_cnt = 0; |
| 125 | atomic_set(&avtimer.adsp_ready, 0); |
| 126 | schedule_delayed_work(&avtimer.ssr_dwork, |
| 127 | msecs_to_jiffies(SSR_WAKETIME)); |
| 128 | break; |
| 129 | } |
| 130 | |
| 131 | case AVCS_CMD_RSP_REMOTE_AVTIMER_VOTE_REQUEST: |
Ajit Pandey | 6356fbb | 2019-08-26 16:06:51 +0530 | [diff] [blame] | 132 | if (data->payload_size < sizeof(uint32_t)) { |
| 133 | pr_err("%s: payload has invalid size %d\n", |
| 134 | __func__, data->payload_size); |
| 135 | return -EINVAL; |
| 136 | } |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 137 | payload1 = data->payload; |
| 138 | pr_debug("%s: RSP_REMOTE_AVTIMER_VOTE_REQUEST handle %x\n", |
| 139 | __func__, payload1[0]); |
| 140 | avtimer.timer_handle = payload1[0]; |
| 141 | avtimer.enable_timer_resp_received = 1; |
| 142 | wake_up(&avtimer.adsp_resp_wait); |
| 143 | break; |
| 144 | default: |
| 145 | pr_err("%s: Message adspcore svc: %d\n", |
| 146 | __func__, data->opcode); |
| 147 | break; |
| 148 | } |
| 149 | |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | int avcs_core_open(void) |
| 154 | { |
| 155 | if (!avtimer.core_handle_q) |
| 156 | avtimer.core_handle_q = apr_register("ADSP", "CORE", |
| 157 | aprv2_core_fn_q, TEMP_PORT, NULL); |
| 158 | pr_debug("%s: Open_q %p\n", __func__, avtimer.core_handle_q); |
| 159 | if (!avtimer.core_handle_q) { |
| 160 | pr_err("%s: Unable to register CORE\n", __func__); |
| 161 | return -EINVAL; |
| 162 | } |
| 163 | return 0; |
| 164 | } |
| 165 | EXPORT_SYMBOL(avcs_core_open); |
| 166 | |
| 167 | static int avcs_core_disable_avtimer(int timerhandle) |
| 168 | { |
| 169 | int rc = -EINVAL; |
| 170 | struct adsp_avt_timer payload; |
| 171 | |
| 172 | if (!timerhandle) { |
| 173 | pr_err("%s: Invalid timer handle\n", __func__); |
| 174 | return -EINVAL; |
| 175 | } |
| 176 | memset(&payload, 0, sizeof(payload)); |
| 177 | rc = avcs_core_open(); |
| 178 | if (!rc && avtimer.core_handle_q) { |
| 179 | payload.hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_SEQ_CMD, |
| 180 | APR_HDR_LEN(APR_HDR_SIZE), APR_PKT_VER); |
| 181 | payload.hdr.pkt_size = |
| 182 | sizeof(struct adsp_avt_timer); |
| 183 | payload.hdr.src_svc = avtimer.core_handle_q->id; |
| 184 | payload.hdr.src_domain = APR_DOMAIN_APPS; |
| 185 | payload.hdr.dest_domain = APR_DOMAIN_ADSP; |
| 186 | payload.hdr.dest_svc = APR_SVC_ADSP_CORE; |
| 187 | payload.hdr.src_port = TEMP_PORT; |
| 188 | payload.hdr.dest_port = TEMP_PORT; |
| 189 | payload.hdr.token = CORE_CLIENT; |
| 190 | payload.hdr.opcode = AVCS_CMD_REMOTE_AVTIMER_RELEASE_REQUEST; |
| 191 | payload.avtimer_handle = timerhandle; |
| 192 | pr_debug("%s: disable avtimer opcode %x handle %x\n", |
| 193 | __func__, payload.hdr.opcode, payload.avtimer_handle); |
| 194 | rc = apr_send_pkt(avtimer.core_handle_q, |
| 195 | (uint32_t *)&payload); |
| 196 | if (rc < 0) |
| 197 | pr_err("%s: Enable AVtimer failed op[0x%x]rc[%d]\n", |
| 198 | __func__, payload.hdr.opcode, rc); |
| 199 | else |
| 200 | rc = 0; |
| 201 | } |
| 202 | return rc; |
| 203 | } |
| 204 | |
| 205 | static int avcs_core_enable_avtimer(char *client_name) |
| 206 | { |
| 207 | int rc = -EINVAL, ret = -EINVAL; |
| 208 | struct adsp_avt_timer payload; |
| 209 | |
| 210 | if (!client_name) { |
| 211 | pr_err("%s: Invalid params\n", __func__); |
| 212 | return -EINVAL; |
| 213 | } |
| 214 | memset(&payload, 0, sizeof(payload)); |
| 215 | rc = avcs_core_open(); |
| 216 | if (!rc && avtimer.core_handle_q) { |
| 217 | avtimer.enable_timer_resp_received = 0; |
| 218 | payload.hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_EVENT, |
| 219 | APR_HDR_LEN(APR_HDR_SIZE), APR_PKT_VER); |
| 220 | payload.hdr.pkt_size = |
| 221 | sizeof(struct adsp_avt_timer); |
| 222 | payload.hdr.src_svc = avtimer.core_handle_q->id; |
| 223 | payload.hdr.src_domain = APR_DOMAIN_APPS; |
| 224 | payload.hdr.dest_domain = APR_DOMAIN_ADSP; |
| 225 | payload.hdr.dest_svc = APR_SVC_ADSP_CORE; |
| 226 | payload.hdr.src_port = TEMP_PORT; |
| 227 | payload.hdr.dest_port = TEMP_PORT; |
| 228 | payload.hdr.token = CORE_CLIENT; |
| 229 | payload.hdr.opcode = AVCS_CMD_REMOTE_AVTIMER_VOTE_REQUEST; |
| 230 | strlcpy(payload.client_name, client_name, |
| 231 | sizeof(payload.client_name)); |
| 232 | pr_debug("%s: enable avtimer opcode %x client name %s\n", |
| 233 | __func__, payload.hdr.opcode, payload.client_name); |
| 234 | rc = apr_send_pkt(avtimer.core_handle_q, |
| 235 | (uint32_t *)&payload); |
| 236 | if (rc < 0) { |
| 237 | pr_err("%s: Enable AVtimer failed op[0x%x]rc[%d]\n", |
| 238 | __func__, payload.hdr.opcode, rc); |
| 239 | goto bail; |
| 240 | } else |
| 241 | rc = 0; |
| 242 | ret = wait_event_timeout(avtimer.adsp_resp_wait, |
| 243 | (avtimer.enable_timer_resp_received == 1), |
| 244 | msecs_to_jiffies(TIMEOUT_MS)); |
| 245 | if (!ret) { |
| 246 | pr_err("%s: wait_event timeout for Enable timer\n", |
| 247 | __func__); |
| 248 | rc = -ETIMEDOUT; |
| 249 | } |
| 250 | if (rc) |
| 251 | avtimer.timer_handle = 0; |
| 252 | } |
| 253 | bail: |
| 254 | return rc; |
| 255 | } |
| 256 | |
| 257 | int avcs_core_disable_power_collapse(int enable) |
| 258 | { |
| 259 | int rc = 0; |
| 260 | |
| 261 | mutex_lock(&avtimer.avtimer_lock); |
| 262 | if (enable) { |
| 263 | if (avtimer.avtimer_open_cnt) { |
| 264 | avtimer.avtimer_open_cnt++; |
| 265 | pr_debug("%s: opened avtimer open count=%d\n", |
| 266 | __func__, avtimer.avtimer_open_cnt); |
| 267 | rc = 0; |
| 268 | goto done; |
| 269 | } |
| 270 | rc = avcs_core_enable_avtimer("timer"); |
| 271 | if (!rc) { |
| 272 | avtimer.avtimer_open_cnt++; |
| 273 | atomic_set(&avtimer.adsp_ready, 1); |
| 274 | } |
| 275 | } else { |
| 276 | if (avtimer.avtimer_open_cnt > 0) { |
| 277 | avtimer.avtimer_open_cnt--; |
| 278 | if (!avtimer.avtimer_open_cnt) { |
| 279 | rc = avcs_core_disable_avtimer( |
| 280 | avtimer.timer_handle); |
| 281 | avtimer.timer_handle = 0; |
| 282 | } |
| 283 | } |
| 284 | } |
| 285 | done: |
| 286 | mutex_unlock(&avtimer.avtimer_lock); |
| 287 | return rc; |
| 288 | } |
| 289 | EXPORT_SYMBOL(avcs_core_disable_power_collapse); |
| 290 | |
| 291 | static void reset_work(struct work_struct *work) |
| 292 | { |
| 293 | if (q6core_is_adsp_ready()) { |
| 294 | avcs_core_disable_power_collapse(1); |
| 295 | avtimer.num_retries = Q6_READY_MAX_RETRIES; |
| 296 | return; |
| 297 | } |
| 298 | pr_debug("%s:Q6 not ready-retry after sometime\n", __func__); |
| 299 | if (--avtimer.num_retries > 0) { |
| 300 | schedule_delayed_work(&avtimer.ssr_dwork, |
| 301 | msecs_to_jiffies(Q6_READY_RETRY)); |
| 302 | } else { |
| 303 | pr_err("%s: Q6 failed responding after multiple retries\n", |
| 304 | __func__); |
| 305 | avtimer.num_retries = Q6_READY_MAX_RETRIES; |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | int avcs_core_query_timer(uint64_t *avtimer_tick) |
| 310 | { |
| 311 | uint32_t avtimer_msw = 0, avtimer_lsw = 0; |
| 312 | uint64_t avtimer_tick_temp; |
| 313 | |
| 314 | if (!atomic_read(&avtimer.adsp_ready)) { |
| 315 | pr_debug("%s:In SSR, return\n", __func__); |
| 316 | return -ENETRESET; |
| 317 | } |
| 318 | avtimer_lsw = ioread32(avtimer.p_avtimer_lsw); |
| 319 | avtimer_msw = ioread32(avtimer.p_avtimer_msw); |
| 320 | |
| 321 | avtimer_tick_temp = (uint64_t)((uint64_t)avtimer_msw << 32) |
| 322 | | avtimer_lsw; |
| 323 | *avtimer_tick = mul_u64_u32_div(avtimer_tick_temp, avtimer.clk_mult, |
| 324 | avtimer.clk_div); |
| 325 | pr_debug_ratelimited("%s:Avtimer: msw: %u, lsw: %u, tick: %llu\n", |
| 326 | __func__, |
| 327 | avtimer_msw, avtimer_lsw, *avtimer_tick); |
| 328 | return 0; |
| 329 | } |
| 330 | EXPORT_SYMBOL(avcs_core_query_timer); |
| 331 | |
Laxminath Kasam | 63f71cc | 2018-03-05 15:56:29 +0530 | [diff] [blame] | 332 | #if IS_ENABLED(CONFIG_AVTIMER_LEGACY) |
| 333 | static void avcs_set_isp_fptr(bool enable) |
| 334 | { |
| 335 | struct avtimer_fptr_t av_fptr; |
| 336 | |
| 337 | if (enable) { |
| 338 | av_fptr.fptr_avtimer_open = avcs_core_open; |
| 339 | av_fptr.fptr_avtimer_enable = avcs_core_disable_power_collapse; |
| 340 | av_fptr.fptr_avtimer_get_time = avcs_core_query_timer; |
| 341 | msm_isp_set_avtimer_fptr(av_fptr); |
| 342 | } else { |
| 343 | av_fptr.fptr_avtimer_open = NULL; |
| 344 | av_fptr.fptr_avtimer_enable = NULL; |
| 345 | av_fptr.fptr_avtimer_get_time = NULL; |
| 346 | msm_isp_set_avtimer_fptr(av_fptr); |
| 347 | } |
| 348 | } |
| 349 | #else |
| 350 | static void avcs_set_isp_fptr(bool enable) |
| 351 | { |
| 352 | } |
| 353 | #endif |
| 354 | |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 355 | static int avtimer_open(struct inode *inode, struct file *file) |
| 356 | { |
| 357 | return avcs_core_disable_power_collapse(1); |
| 358 | } |
| 359 | |
| 360 | static int avtimer_release(struct inode *inode, struct file *file) |
| 361 | { |
| 362 | return avcs_core_disable_power_collapse(0); |
| 363 | } |
| 364 | |
| 365 | /* |
| 366 | * ioctl call provides GET_AVTIMER |
| 367 | */ |
| 368 | static long avtimer_ioctl(struct file *file, unsigned int ioctl_num, |
| 369 | unsigned long ioctl_param) |
| 370 | { |
| 371 | switch (ioctl_num) { |
| 372 | case IOCTL_GET_AVTIMER_TICK: |
| 373 | { |
| 374 | uint64_t avtimer_tick = 0; |
| 375 | int rc; |
| 376 | |
| 377 | rc = avcs_core_query_timer(&avtimer_tick); |
| 378 | |
| 379 | if (rc) { |
| 380 | pr_err("%s: Error: Invalid AV Timer tick, rc = %d\n", |
| 381 | __func__, rc); |
| 382 | return rc; |
| 383 | } |
| 384 | |
| 385 | pr_debug_ratelimited("%s: AV Timer tick: time %llx\n", |
| 386 | __func__, avtimer_tick); |
| 387 | if (copy_to_user((void *) ioctl_param, &avtimer_tick, |
| 388 | sizeof(avtimer_tick))) { |
| 389 | pr_err("%s: copy_to_user failed\n", __func__); |
| 390 | return -EFAULT; |
| 391 | } |
| 392 | } |
| 393 | break; |
| 394 | |
| 395 | default: |
| 396 | pr_err("%s: invalid cmd\n", __func__); |
| 397 | return -EINVAL; |
| 398 | } |
| 399 | return 0; |
| 400 | } |
| 401 | |
| 402 | static const struct file_operations avtimer_fops = { |
| 403 | .unlocked_ioctl = avtimer_ioctl, |
| 404 | .compat_ioctl = avtimer_ioctl, |
| 405 | .open = avtimer_open, |
| 406 | .release = avtimer_release |
| 407 | }; |
| 408 | |
| 409 | static int dev_avtimer_probe(struct platform_device *pdev) |
| 410 | { |
| 411 | int result = 0; |
| 412 | dev_t dev = MKDEV(major, 0); |
| 413 | struct device *device_handle; |
| 414 | struct resource *reg_lsb = NULL, *reg_msb = NULL; |
| 415 | uint32_t clk_div_val; |
| 416 | uint32_t clk_mult_val; |
| 417 | |
| 418 | if (!pdev) { |
| 419 | pr_err("%s: Invalid params\n", __func__); |
| 420 | return -EINVAL; |
| 421 | } |
| 422 | reg_lsb = platform_get_resource_byname(pdev, |
| 423 | IORESOURCE_MEM, "avtimer_lsb_addr"); |
| 424 | if (!reg_lsb) { |
| 425 | dev_err(&pdev->dev, "%s: Looking up %s property", |
| 426 | "avtimer_lsb_addr", __func__); |
| 427 | return -EINVAL; |
| 428 | } |
| 429 | reg_msb = platform_get_resource_byname(pdev, |
| 430 | IORESOURCE_MEM, "avtimer_msb_addr"); |
| 431 | if (!reg_msb) { |
| 432 | dev_err(&pdev->dev, "%s: Looking up %s property", |
| 433 | "avtimer_msb_addr", __func__); |
| 434 | return -EINVAL; |
| 435 | } |
| 436 | INIT_DELAYED_WORK(&avtimer.ssr_dwork, reset_work); |
| 437 | |
| 438 | avtimer.p_avtimer_lsw = devm_ioremap_nocache(&pdev->dev, |
| 439 | reg_lsb->start, resource_size(reg_lsb)); |
| 440 | if (!avtimer.p_avtimer_lsw) { |
| 441 | dev_err(&pdev->dev, "%s: ioremap failed for lsb avtimer register", |
| 442 | __func__); |
| 443 | return -ENOMEM; |
| 444 | } |
| 445 | |
| 446 | avtimer.p_avtimer_msw = devm_ioremap_nocache(&pdev->dev, |
| 447 | reg_msb->start, resource_size(reg_msb)); |
| 448 | if (!avtimer.p_avtimer_msw) { |
| 449 | dev_err(&pdev->dev, "%s: ioremap failed for msb avtimer register", |
| 450 | __func__); |
| 451 | goto unmap; |
| 452 | } |
| 453 | avtimer.num_retries = Q6_READY_MAX_RETRIES; |
| 454 | /* get the device number */ |
| 455 | if (major) |
| 456 | result = register_chrdev_region(dev, 1, DEVICE_NAME); |
| 457 | else { |
| 458 | result = alloc_chrdev_region(&dev, 0, 1, DEVICE_NAME); |
| 459 | major = MAJOR(dev); |
| 460 | } |
| 461 | |
| 462 | if (result < 0) { |
| 463 | dev_err(&pdev->dev, "%s: Registering avtimer device failed\n", |
| 464 | __func__); |
| 465 | goto unmap; |
| 466 | } |
| 467 | |
| 468 | avtimer.avtimer_class = class_create(THIS_MODULE, "avtimer"); |
| 469 | if (IS_ERR(avtimer.avtimer_class)) { |
| 470 | result = PTR_ERR(avtimer.avtimer_class); |
| 471 | dev_err(&pdev->dev, "%s: Error creating avtimer class: %d\n", |
| 472 | __func__, result); |
| 473 | goto unregister_chrdev_region; |
| 474 | } |
| 475 | |
| 476 | cdev_init(&avtimer.myc, &avtimer_fops); |
| 477 | result = cdev_add(&avtimer.myc, dev, 1); |
| 478 | |
| 479 | if (result < 0) { |
| 480 | dev_err(&pdev->dev, "%s: Registering file operations failed\n", |
| 481 | __func__); |
| 482 | goto class_destroy; |
| 483 | } |
| 484 | |
| 485 | device_handle = device_create(avtimer.avtimer_class, |
| 486 | NULL, avtimer.myc.dev, NULL, "avtimer"); |
| 487 | if (IS_ERR(device_handle)) { |
| 488 | result = PTR_ERR(device_handle); |
| 489 | pr_err("%s: device_create failed: %d\n", __func__, result); |
| 490 | goto class_destroy; |
| 491 | } |
| 492 | init_waitqueue_head(&avtimer.adsp_resp_wait); |
| 493 | mutex_init(&avtimer.avtimer_lock); |
| 494 | avtimer.avtimer_open_cnt = 0; |
| 495 | |
| 496 | pr_debug("%s: Device create done for avtimer major=%d\n", |
| 497 | __func__, major); |
| 498 | |
| 499 | if (of_property_read_u32(pdev->dev.of_node, |
| 500 | "qcom,clk-div", &clk_div_val)) |
| 501 | avtimer.clk_div = 1; |
| 502 | else |
| 503 | avtimer.clk_div = clk_div_val; |
| 504 | |
| 505 | if (of_property_read_u32(pdev->dev.of_node, |
| 506 | "qcom,clk-mult", &clk_mult_val)) |
| 507 | avtimer.clk_mult = 1; |
| 508 | else |
| 509 | avtimer.clk_mult = clk_mult_val; |
| 510 | |
Laxminath Kasam | 63f71cc | 2018-03-05 15:56:29 +0530 | [diff] [blame] | 511 | avcs_set_isp_fptr(true); |
| 512 | |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 513 | pr_debug("%s: avtimer.clk_div = %d, avtimer.clk_mult = %d\n", |
| 514 | __func__, avtimer.clk_div, avtimer.clk_mult); |
| 515 | return 0; |
| 516 | |
| 517 | class_destroy: |
| 518 | class_destroy(avtimer.avtimer_class); |
| 519 | unregister_chrdev_region: |
| 520 | unregister_chrdev_region(MKDEV(major, 0), 1); |
| 521 | unmap: |
| 522 | if (avtimer.p_avtimer_lsw) |
| 523 | devm_iounmap(&pdev->dev, avtimer.p_avtimer_lsw); |
| 524 | if (avtimer.p_avtimer_msw) |
| 525 | devm_iounmap(&pdev->dev, avtimer.p_avtimer_msw); |
| 526 | avtimer.p_avtimer_lsw = NULL; |
| 527 | avtimer.p_avtimer_msw = NULL; |
| 528 | return result; |
| 529 | |
| 530 | } |
| 531 | |
| 532 | static int dev_avtimer_remove(struct platform_device *pdev) |
| 533 | { |
| 534 | pr_debug("%s: dev_avtimer_remove\n", __func__); |
| 535 | |
| 536 | if (avtimer.p_avtimer_lsw) |
| 537 | devm_iounmap(&pdev->dev, avtimer.p_avtimer_lsw); |
| 538 | if (avtimer.p_avtimer_msw) |
| 539 | devm_iounmap(&pdev->dev, avtimer.p_avtimer_msw); |
| 540 | device_destroy(avtimer.avtimer_class, avtimer.myc.dev); |
| 541 | cdev_del(&avtimer.myc); |
| 542 | class_destroy(avtimer.avtimer_class); |
| 543 | unregister_chrdev_region(MKDEV(major, 0), 1); |
Laxminath Kasam | 63f71cc | 2018-03-05 15:56:29 +0530 | [diff] [blame] | 544 | avcs_set_isp_fptr(false); |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 545 | |
| 546 | return 0; |
| 547 | } |
| 548 | |
| 549 | static const struct of_device_id avtimer_machine_of_match[] = { |
| 550 | { .compatible = "qcom,avtimer", }, |
| 551 | {}, |
| 552 | }; |
| 553 | static struct platform_driver dev_avtimer_driver = { |
| 554 | .probe = dev_avtimer_probe, |
| 555 | .remove = dev_avtimer_remove, |
| 556 | .driver = { |
| 557 | .name = "dev_avtimer", |
| 558 | .of_match_table = avtimer_machine_of_match, |
| 559 | }, |
| 560 | }; |
| 561 | |
Laxminath Kasam | 8b1366a | 2017-10-05 01:44:16 +0530 | [diff] [blame] | 562 | int __init avtimer_init(void) |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 563 | { |
| 564 | s32 rc; |
| 565 | |
| 566 | rc = platform_driver_register(&dev_avtimer_driver); |
| 567 | if (rc < 0) { |
| 568 | pr_err("%s: platform_driver_register failed\n", __func__); |
| 569 | goto error_platform_driver; |
| 570 | } |
| 571 | pr_debug("%s: dev_avtimer_init : done\n", __func__); |
| 572 | |
| 573 | return 0; |
| 574 | error_platform_driver: |
| 575 | |
| 576 | pr_err("%s: encounterd error\n", __func__); |
| 577 | return rc; |
| 578 | } |
| 579 | |
Asish Bhattacharya | 5faacb3 | 2017-12-04 17:23:15 +0530 | [diff] [blame] | 580 | void avtimer_exit(void) |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 581 | { |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 582 | platform_driver_unregister(&dev_avtimer_driver); |
| 583 | } |
| 584 | |
Laxminath Kasam | d1f3619 | 2017-08-03 18:54:01 +0530 | [diff] [blame] | 585 | MODULE_DESCRIPTION("avtimer driver"); |
| 586 | MODULE_LICENSE("GPL v2"); |