drivers/remoteproc/qcom_adsp_pil.c

   1 /*
   2  * Qualcomm ADSP/SLPI Peripheral Image Loader for MSM8974 and MSM8996
   3  *
   4  * Copyright (C) 2016 Linaro Ltd
   5  * Copyright (C) 2014 Sony Mobile Communications AB
   6  * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/clk.h>
  19 #include <linux/firmware.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/of_address.h>
  24 #include <linux/of_device.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/qcom_scm.h>
  27 #include <linux/regulator/consumer.h>
  28 #include <linux/remoteproc.h>
  29 #include <linux/soc/qcom/mdt_loader.h>
  30 #include <linux/soc/qcom/smem.h>
  31 #include <linux/soc/qcom/smem_state.h>
  32
  33 #include "qcom_common.h"
  34 #include "remoteproc_internal.h"
  35
  36 struct adsp_data {
  37         int crash_reason_smem;
  38         const char *firmware_name;
  39         int pas_id;
  40         bool has_aggre2_clk;
  41 };
  42
  43 struct qcom_adsp {
  44         struct device *dev;
  45         struct rproc *rproc;
  46
  47         int wdog_irq;
  48         int fatal_irq;
  49         int ready_irq;
  50         int handover_irq;
  51         int stop_ack_irq;
  52
  53         struct qcom_smem_state *state;
  54         unsigned stop_bit;
  55
  56         struct clk *xo;
  57         struct clk *aggre2_clk;
  58
  59         struct regulator *cx_supply;
  60         struct regulator *px_supply;
  61
  62         int pas_id;
  63         int crash_reason_smem;
  64         bool has_aggre2_clk;
  65
  66         struct completion start_done;
  67         struct completion stop_done;
  68
  69         phys_addr_t mem_phys;
  70         phys_addr_t mem_reloc;
  71         void *mem_region;
  72         size_t mem_size;
  73
  74         struct qcom_rproc_subdev smd_subdev;
  75 };
  76
  77 static int adsp_load(struct rproc *rproc, const struct firmware *fw)
  78 {
  79         struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
  80
  81         return qcom_mdt_load(adsp->dev, fw, rproc->firmware, adsp->pas_id,
  82                              adsp->mem_region, adsp->mem_phys, adsp->mem_size);
  83 }
  84
  85 static const struct rproc_fw_ops adsp_fw_ops = {
  86         .find_rsc_table = qcom_mdt_find_rsc_table,
  87         .load = adsp_load,
  88 };
  89
  90 static int adsp_start(struct rproc *rproc)
  91 {
  92         struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
  93         int ret;
  94
  95         ret = clk_prepare_enable(adsp->xo);
  96         if (ret)
  97                 return ret;
  98
  99         ret = clk_prepare_enable(adsp->aggre2_clk);
 100         if (ret)
 101                 goto disable_xo_clk;
 102
 103         ret = regulator_enable(adsp->cx_supply);
 104         if (ret)
 105                 goto disable_aggre2_clk;
 106
 107         ret = regulator_enable(adsp->px_supply);
 108         if (ret)
 109                 goto disable_cx_supply;
 110
 111         ret = qcom_scm_pas_auth_and_reset(adsp->pas_id);
 112         if (ret) {
 113                 dev_err(adsp->dev,
 114                         "failed to authenticate image and release reset\n");
 115                 goto disable_px_supply;
 116         }
 117
 118         ret = wait_for_completion_timeout(&adsp->start_done,
 119                                           msecs_to_jiffies(5000));
 120         if (!ret) {
 121                 dev_err(adsp->dev, "start timed out\n");
 122                 qcom_scm_pas_shutdown(adsp->pas_id);
 123                 ret = -ETIMEDOUT;
 124                 goto disable_px_supply;
 125         }
 126
 127         ret = 0;
 128
 129 disable_px_supply:
 130         regulator_disable(adsp->px_supply);
 131 disable_cx_supply:
 132         regulator_disable(adsp->cx_supply);
 133 disable_aggre2_clk:
 134         clk_disable_unprepare(adsp->aggre2_clk);
 135 disable_xo_clk:
 136         clk_disable_unprepare(adsp->xo);
 137
 138         return ret;
 139 }
 140
 141 static int adsp_stop(struct rproc *rproc)
 142 {
 143         struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
 144         int ret;
 145
 146         qcom_smem_state_update_bits(adsp->state,
 147                                     BIT(adsp->stop_bit),
 148                                     BIT(adsp->stop_bit));
 149
 150         ret = wait_for_completion_timeout(&adsp->stop_done,
 151                                           msecs_to_jiffies(5000));
 152         if (ret == 0)
 153                 dev_err(adsp->dev, "timed out on wait\n");
 154
 155         qcom_smem_state_update_bits(adsp->state,
 156                                     BIT(adsp->stop_bit),
 157                                     0);
 158
 159         ret = qcom_scm_pas_shutdown(adsp->pas_id);
 160         if (ret)
 161                 dev_err(adsp->dev, "failed to shutdown: %d\n", ret);
 162
 163         return ret;
 164 }
 165
 166 static void *adsp_da_to_va(struct rproc *rproc, u64 da, int len)
 167 {
 168         struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
 169         int offset;
 170
 171         offset = da - adsp->mem_reloc;
 172         if (offset < 0 || offset + len > adsp->mem_size)
 173                 return NULL;
 174
 175         return adsp->mem_region + offset;
 176 }
 177
 178 static const struct rproc_ops adsp_ops = {
 179         .start = adsp_start,
 180         .stop = adsp_stop,
 181         .da_to_va = adsp_da_to_va,
 182 };
 183
 184 static irqreturn_t adsp_wdog_interrupt(int irq, void *dev)
 185 {
 186         struct qcom_adsp *adsp = dev;
 187
 188         rproc_report_crash(adsp->rproc, RPROC_WATCHDOG);
 189
 190         return IRQ_HANDLED;
 191 }
 192
 193 static irqreturn_t adsp_fatal_interrupt(int irq, void *dev)
 194 {
 195         struct qcom_adsp *adsp = dev;
 196         size_t len;
 197         char *msg;
 198
 199         msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, adsp->crash_reason_smem, &len);
 200         if (!IS_ERR(msg) && len > 0 && msg[0])
 201                 dev_err(adsp->dev, "fatal error received: %s\n", msg);
 202
 203         rproc_report_crash(adsp->rproc, RPROC_FATAL_ERROR);
 204
 205         if (!IS_ERR(msg))
 206                 msg[0] = '\0';
 207
 208         return IRQ_HANDLED;
 209 }
 210
 211 static irqreturn_t adsp_ready_interrupt(int irq, void *dev)
 212 {
 213         return IRQ_HANDLED;
 214 }
 215
 216 static irqreturn_t adsp_handover_interrupt(int irq, void *dev)
 217 {
 218         struct qcom_adsp *adsp = dev;
 219
 220         complete(&adsp->start_done);
 221
 222         return IRQ_HANDLED;
 223 }
 224
 225 static irqreturn_t adsp_stop_ack_interrupt(int irq, void *dev)
 226 {
 227         struct qcom_adsp *adsp = dev;
 228
 229         complete(&adsp->stop_done);
 230
 231         return IRQ_HANDLED;
 232 }
 233
 234 static int adsp_init_clock(struct qcom_adsp *adsp)
 235 {
 236         int ret;
 237
 238         adsp->xo = devm_clk_get(adsp->dev, "xo");
 239         if (IS_ERR(adsp->xo)) {
 240                 ret = PTR_ERR(adsp->xo);
 241                 if (ret != -EPROBE_DEFER)
 242                         dev_err(adsp->dev, "failed to get xo clock");
 243                 return ret;
 244         }
 245
 246         if (adsp->has_aggre2_clk) {
 247                 adsp->aggre2_clk = devm_clk_get(adsp->dev, "aggre2");
 248                 if (IS_ERR(adsp->aggre2_clk)) {
 249                         ret = PTR_ERR(adsp->aggre2_clk);
 250                         if (ret != -EPROBE_DEFER)
 251                                 dev_err(adsp->dev,
 252                                         "failed to get aggre2 clock");
 253                         return ret;
 254                 }
 255         }
 256
 257         return 0;
 258 }
 259
 260 static int adsp_init_regulator(struct qcom_adsp *adsp)
 261 {
 262         adsp->cx_supply = devm_regulator_get(adsp->dev, "cx");
 263         if (IS_ERR(adsp->cx_supply))
 264                 return PTR_ERR(adsp->cx_supply);
 265
 266         regulator_set_load(adsp->cx_supply, 100000);
 267
 268         adsp->px_supply = devm_regulator_get(adsp->dev, "px");
 269         if (IS_ERR(adsp->px_supply))
 270                 return PTR_ERR(adsp->px_supply);
 271
 272         return 0;
 273 }
 274
 275 static int adsp_request_irq(struct qcom_adsp *adsp,
 276                              struct platform_device *pdev,
 277                              const char *name,
 278                              irq_handler_t thread_fn)
 279 {
 280         int ret;
 281
 282         ret = platform_get_irq_byname(pdev, name);
 283         if (ret < 0) {
 284                 dev_err(&pdev->dev, "no %s IRQ defined\n", name);
 285                 return ret;
 286         }
 287
 288         ret = devm_request_threaded_irq(&pdev->dev, ret,
 289                                         NULL, thread_fn,
 290                                         IRQF_ONESHOT,
 291                                         "adsp", adsp);
 292         if (ret)
 293                 dev_err(&pdev->dev, "request %s IRQ failed\n", name);
 294
 295         return ret;
 296 }
 297
 298 static int adsp_alloc_memory_region(struct qcom_adsp *adsp)
 299 {
 300         struct device_node *node;
 301         struct resource r;
 302         int ret;
 303
 304         node = of_parse_phandle(adsp->dev->of_node, "memory-region", 0);
 305         if (!node) {
 306                 dev_err(adsp->dev, "no memory-region specified\n");
 307                 return -EINVAL;
 308         }
 309
 310         ret = of_address_to_resource(node, 0, &r);
 311         if (ret)
 312                 return ret;
 313
 314         adsp->mem_phys = adsp->mem_reloc = r.start;
 315         adsp->mem_size = resource_size(&r);
 316         adsp->mem_region = devm_ioremap_wc(adsp->dev, adsp->mem_phys, adsp->mem_size);
 317         if (!adsp->mem_region) {
 318                 dev_err(adsp->dev, "unable to map memory region: %pa+%zx\n",
 319                         &r.start, adsp->mem_size);
 320                 return -EBUSY;
 321         }
 322
 323         return 0;
 324 }
 325
 326 static int adsp_probe(struct platform_device *pdev)
 327 {
 328         const struct adsp_data *desc;
 329         struct qcom_adsp *adsp;
 330         struct rproc *rproc;
 331         int ret;
 332
 333         desc = of_device_get_match_data(&pdev->dev);
 334         if (!desc)
 335                 return -EINVAL;
 336
 337         if (!qcom_scm_is_available())
 338                 return -EPROBE_DEFER;
 339
 340         rproc = rproc_alloc(&pdev->dev, pdev->name, &adsp_ops,
 341                             desc->firmware_name, sizeof(*adsp));
 342         if (!rproc) {
 343                 dev_err(&pdev->dev, "unable to allocate remoteproc\n");
 344                 return -ENOMEM;
 345         }
 346
 347         rproc->fw_ops = &adsp_fw_ops;
 348
 349         adsp = (struct qcom_adsp *)rproc->priv;
 350         adsp->dev = &pdev->dev;
 351         adsp->rproc = rproc;
 352         adsp->pas_id = desc->pas_id;
 353         adsp->crash_reason_smem = desc->crash_reason_smem;
 354         adsp->has_aggre2_clk = desc->has_aggre2_clk;
 355         platform_set_drvdata(pdev, adsp);
 356
 357         init_completion(&adsp->start_done);
 358         init_completion(&adsp->stop_done);
 359
 360         ret = adsp_alloc_memory_region(adsp);
 361         if (ret)
 362                 goto free_rproc;
 363
 364         ret = adsp_init_clock(adsp);
 365         if (ret)
 366                 goto free_rproc;
 367
 368         ret = adsp_init_regulator(adsp);
 369         if (ret)
 370                 goto free_rproc;
 371
 372         ret = adsp_request_irq(adsp, pdev, "wdog", adsp_wdog_interrupt);
 373         if (ret < 0)
 374                 goto free_rproc;
 375         adsp->wdog_irq = ret;
 376
 377         ret = adsp_request_irq(adsp, pdev, "fatal", adsp_fatal_interrupt);
 378         if (ret < 0)
 379                 goto free_rproc;
 380         adsp->fatal_irq = ret;
 381
 382         ret = adsp_request_irq(adsp, pdev, "ready", adsp_ready_interrupt);
 383         if (ret < 0)
 384                 goto free_rproc;
 385         adsp->ready_irq = ret;
 386
 387         ret = adsp_request_irq(adsp, pdev, "handover", adsp_handover_interrupt);
 388         if (ret < 0)
 389                 goto free_rproc;
 390         adsp->handover_irq = ret;
 391
 392         ret = adsp_request_irq(adsp, pdev, "stop-ack", adsp_stop_ack_interrupt);
 393         if (ret < 0)
 394                 goto free_rproc;
 395         adsp->stop_ack_irq = ret;
 396
 397         adsp->state = qcom_smem_state_get(&pdev->dev, "stop",
 398                                           &adsp->stop_bit);
 399         if (IS_ERR(adsp->state)) {
 400                 ret = PTR_ERR(adsp->state);
 401                 goto free_rproc;
 402         }
 403
 404         qcom_add_smd_subdev(rproc, &adsp->smd_subdev);
 405
 406         ret = rproc_add(rproc);
 407         if (ret)
 408                 goto free_rproc;
 409
 410         return 0;
 411
 412 free_rproc:
 413         rproc_free(rproc);
 414
 415         return ret;
 416 }
 417
 418 static int adsp_remove(struct platform_device *pdev)
 419 {
 420         struct qcom_adsp *adsp = platform_get_drvdata(pdev);
 421
 422         qcom_smem_state_put(adsp->state);
 423         rproc_del(adsp->rproc);
 424
 425         qcom_remove_smd_subdev(adsp->rproc, &adsp->smd_subdev);
 426         rproc_free(adsp->rproc);
 427
 428         return 0;
 429 }
 430
 431 static const struct adsp_data adsp_resource_init = {
 432                 .crash_reason_smem = 423,
 433                 .firmware_name = "adsp.mdt",
 434                 .pas_id = 1,
 435                 .has_aggre2_clk = false,
 436 };
 437
 438 static const struct adsp_data slpi_resource_init = {
 439                 .crash_reason_smem = 424,
 440                 .firmware_name = "slpi.mdt",
 441                 .pas_id = 12,
 442                 .has_aggre2_clk = true,
 443 };
 444
 445 static const struct of_device_id adsp_of_match[] = {
 446         { .compatible = "qcom,msm8974-adsp-pil", .data = &adsp_resource_init},
 447         { .compatible = "qcom,msm8996-adsp-pil", .data = &adsp_resource_init},
 448         { .compatible = "qcom,msm8996-slpi-pil", .data = &slpi_resource_init},
 449         { },
 450 };
 451 MODULE_DEVICE_TABLE(of, adsp_of_match);
 452
 453 static struct platform_driver adsp_driver = {
 454         .probe = adsp_probe,
 455         .remove = adsp_remove,
 456         .driver = {
 457                 .name = "qcom_adsp_pil",
 458                 .of_match_table = adsp_of_match,
 459         },
 460 };
 461
 462 module_platform_driver(adsp_driver);
 463 MODULE_DESCRIPTION("Qualcomm MSM8974/MSM8996 ADSP Peripherial Image Loader");
 464 MODULE_LICENSE("GPL v2");