drivers/remoteproc/qcom_q6v5_pil.c

   1 /*
   2  * Qualcomm Peripheral Image Loader
   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/delay.h>
  20 #include <linux/dma-mapping.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/kernel.h>
  23 #include <linux/mfd/syscon.h>
  24 #include <linux/module.h>
  25 #include <linux/of_address.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/regmap.h>
  28 #include <linux/regulator/consumer.h>
  29 #include <linux/remoteproc.h>
  30 #include <linux/reset.h>
  31 #include <linux/soc/qcom/smem.h>
  32 #include <linux/soc/qcom/smem_state.h>
  33
  34 #include "remoteproc_internal.h"
  35 #include "qcom_mdt_loader.h"
  36
  37 #include <linux/qcom_scm.h>
  38
  39 #define MBA_FIRMWARE_NAME               "mba.b00"
  40 #define MPSS_FIRMWARE_NAME              "modem.mdt"
  41
  42 #define MPSS_CRASH_REASON_SMEM          421
  43
  44 /* RMB Status Register Values */
  45 #define RMB_PBL_SUCCESS                 0x1
  46
  47 #define RMB_MBA_XPU_UNLOCKED            0x1
  48 #define RMB_MBA_XPU_UNLOCKED_SCRIBBLED  0x2
  49 #define RMB_MBA_META_DATA_AUTH_SUCCESS  0x3
  50 #define RMB_MBA_AUTH_COMPLETE           0x4
  51
  52 /* PBL/MBA interface registers */
  53 #define RMB_MBA_IMAGE_REG               0x00
  54 #define RMB_PBL_STATUS_REG              0x04
  55 #define RMB_MBA_COMMAND_REG             0x08
  56 #define RMB_MBA_STATUS_REG              0x0C
  57 #define RMB_PMI_META_DATA_REG           0x10
  58 #define RMB_PMI_CODE_START_REG          0x14
  59 #define RMB_PMI_CODE_LENGTH_REG         0x18
  60
  61 #define RMB_CMD_META_DATA_READY         0x1
  62 #define RMB_CMD_LOAD_READY              0x2
  63
  64 /* QDSP6SS Register Offsets */
  65 #define QDSP6SS_RESET_REG               0x014
  66 #define QDSP6SS_GFMUX_CTL_REG           0x020
  67 #define QDSP6SS_PWR_CTL_REG             0x030
  68
  69 /* AXI Halt Register Offsets */
  70 #define AXI_HALTREQ_REG                 0x0
  71 #define AXI_HALTACK_REG                 0x4
  72 #define AXI_IDLE_REG                    0x8
  73
  74 #define HALT_ACK_TIMEOUT_MS             100
  75
  76 /* QDSP6SS_RESET */
  77 #define Q6SS_STOP_CORE                  BIT(0)
  78 #define Q6SS_CORE_ARES                  BIT(1)
  79 #define Q6SS_BUS_ARES_ENABLE            BIT(2)
  80
  81 /* QDSP6SS_GFMUX_CTL */
  82 #define Q6SS_CLK_ENABLE                 BIT(1)
  83
  84 /* QDSP6SS_PWR_CTL */
  85 #define Q6SS_L2DATA_SLP_NRET_N_0        BIT(0)
  86 #define Q6SS_L2DATA_SLP_NRET_N_1        BIT(1)
  87 #define Q6SS_L2DATA_SLP_NRET_N_2        BIT(2)
  88 #define Q6SS_L2TAG_SLP_NRET_N           BIT(16)
  89 #define Q6SS_ETB_SLP_NRET_N             BIT(17)
  90 #define Q6SS_L2DATA_STBY_N              BIT(18)
  91 #define Q6SS_SLP_RET_N                  BIT(19)
  92 #define Q6SS_CLAMP_IO                   BIT(20)
  93 #define QDSS_BHS_ON                     BIT(21)
  94 #define QDSS_LDO_BYP                    BIT(22)
  95
  96 struct q6v5 {
  97         struct device *dev;
  98         struct rproc *rproc;
  99
 100         void __iomem *reg_base;
 101         void __iomem *rmb_base;
 102
 103         struct regmap *halt_map;
 104         u32 halt_q6;
 105         u32 halt_modem;
 106         u32 halt_nc;
 107
 108         struct reset_control *mss_restart;
 109
 110         struct qcom_smem_state *state;
 111         unsigned stop_bit;
 112
 113         struct regulator_bulk_data supply[4];
 114
 115         struct clk *ahb_clk;
 116         struct clk *axi_clk;
 117         struct clk *rom_clk;
 118
 119         struct completion start_done;
 120         struct completion stop_done;
 121         bool running;
 122
 123         phys_addr_t mba_phys;
 124         void *mba_region;
 125         size_t mba_size;
 126
 127         phys_addr_t mpss_phys;
 128         phys_addr_t mpss_reloc;
 129         void *mpss_region;
 130         size_t mpss_size;
 131 };
 132
 133 enum {
 134         Q6V5_SUPPLY_CX,
 135         Q6V5_SUPPLY_MX,
 136         Q6V5_SUPPLY_MSS,
 137         Q6V5_SUPPLY_PLL,
 138 };
 139
 140 static int q6v5_regulator_init(struct q6v5 *qproc)
 141 {
 142         int ret;
 143
 144         qproc->supply[Q6V5_SUPPLY_CX].supply = "cx";
 145         qproc->supply[Q6V5_SUPPLY_MX].supply = "mx";
 146         qproc->supply[Q6V5_SUPPLY_MSS].supply = "mss";
 147         qproc->supply[Q6V5_SUPPLY_PLL].supply = "pll";
 148
 149         ret = devm_regulator_bulk_get(qproc->dev,
 150                                       ARRAY_SIZE(qproc->supply), qproc->supply);
 151         if (ret < 0) {
 152                 dev_err(qproc->dev, "failed to get supplies\n");
 153                 return ret;
 154         }
 155
 156         regulator_set_load(qproc->supply[Q6V5_SUPPLY_CX].consumer, 100000);
 157         regulator_set_load(qproc->supply[Q6V5_SUPPLY_MSS].consumer, 100000);
 158         regulator_set_load(qproc->supply[Q6V5_SUPPLY_PLL].consumer, 10000);
 159
 160         return 0;
 161 }
 162
 163 static int q6v5_regulator_enable(struct q6v5 *qproc)
 164 {
 165         struct regulator *mss = qproc->supply[Q6V5_SUPPLY_MSS].consumer;
 166         struct regulator *mx = qproc->supply[Q6V5_SUPPLY_MX].consumer;
 167         int ret;
 168
 169         /* TODO: Q6V5_SUPPLY_CX is supposed to be set to super-turbo here */
 170
 171         ret = regulator_set_voltage(mx, 1050000, INT_MAX);
 172         if (ret)
 173                 return ret;
 174
 175         regulator_set_voltage(mss, 1000000, 1150000);
 176
 177         return regulator_bulk_enable(ARRAY_SIZE(qproc->supply), qproc->supply);
 178 }
 179
 180 static void q6v5_regulator_disable(struct q6v5 *qproc)
 181 {
 182         struct regulator *mss = qproc->supply[Q6V5_SUPPLY_MSS].consumer;
 183         struct regulator *mx = qproc->supply[Q6V5_SUPPLY_MX].consumer;
 184
 185         /* TODO: Q6V5_SUPPLY_CX corner votes should be released */
 186
 187         regulator_bulk_disable(ARRAY_SIZE(qproc->supply), qproc->supply);
 188         regulator_set_voltage(mx, 0, INT_MAX);
 189         regulator_set_voltage(mss, 0, 1150000);
 190 }
 191
 192 static int q6v5_load(struct rproc *rproc, const struct firmware *fw)
 193 {
 194         struct q6v5 *qproc = rproc->priv;
 195
 196         memcpy(qproc->mba_region, fw->data, fw->size);
 197
 198         return 0;
 199 }
 200
 201 static const struct rproc_fw_ops q6v5_fw_ops = {
 202         .find_rsc_table = qcom_mdt_find_rsc_table,
 203         .load = q6v5_load,
 204 };
 205
 206 static int q6v5_rmb_pbl_wait(struct q6v5 *qproc, int ms)
 207 {
 208         unsigned long timeout;
 209         s32 val;
 210
 211         timeout = jiffies + msecs_to_jiffies(ms);
 212         for (;;) {
 213                 val = readl(qproc->rmb_base + RMB_PBL_STATUS_REG);
 214                 if (val)
 215                         break;
 216
 217                 if (time_after(jiffies, timeout))
 218                         return -ETIMEDOUT;
 219
 220                 msleep(1);
 221         }
 222
 223         return val;
 224 }
 225
 226 static int q6v5_rmb_mba_wait(struct q6v5 *qproc, u32 status, int ms)
 227 {
 228
 229         unsigned long timeout;
 230         s32 val;
 231
 232         timeout = jiffies + msecs_to_jiffies(ms);
 233         for (;;) {
 234                 val = readl(qproc->rmb_base + RMB_MBA_STATUS_REG);
 235                 if (val < 0)
 236                         break;
 237
 238                 if (!status && val)
 239                         break;
 240                 else if (status && val == status)
 241                         break;
 242
 243                 if (time_after(jiffies, timeout))
 244                         return -ETIMEDOUT;
 245
 246                 msleep(1);
 247         }
 248
 249         return val;
 250 }
 251
 252 static int q6v5proc_reset(struct q6v5 *qproc)
 253 {
 254         u32 val;
 255         int ret;
 256
 257         /* Assert resets, stop core */
 258         val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
 259         val |= (Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE);
 260         writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
 261
 262         /* Enable power block headswitch, and wait for it to stabilize */
 263         val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
 264         val |= QDSS_BHS_ON | QDSS_LDO_BYP;
 265         writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
 266         udelay(1);
 267
 268         /*
 269          * Turn on memories. L2 banks should be done individually
 270          * to minimize inrush current.
 271          */
 272         val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
 273         val |= Q6SS_SLP_RET_N | Q6SS_L2TAG_SLP_NRET_N |
 274                 Q6SS_ETB_SLP_NRET_N | Q6SS_L2DATA_STBY_N;
 275         writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
 276         val |= Q6SS_L2DATA_SLP_NRET_N_2;
 277         writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
 278         val |= Q6SS_L2DATA_SLP_NRET_N_1;
 279         writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
 280         val |= Q6SS_L2DATA_SLP_NRET_N_0;
 281         writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
 282
 283         /* Remove IO clamp */
 284         val &= ~Q6SS_CLAMP_IO;
 285         writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
 286
 287         /* Bring core out of reset */
 288         val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
 289         val &= ~Q6SS_CORE_ARES;
 290         writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
 291
 292         /* Turn on core clock */
 293         val = readl(qproc->reg_base + QDSP6SS_GFMUX_CTL_REG);
 294         val |= Q6SS_CLK_ENABLE;
 295         writel(val, qproc->reg_base + QDSP6SS_GFMUX_CTL_REG);
 296
 297         /* Start core execution */
 298         val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
 299         val &= ~Q6SS_STOP_CORE;
 300         writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
 301
 302         /* Wait for PBL status */
 303         ret = q6v5_rmb_pbl_wait(qproc, 1000);
 304         if (ret == -ETIMEDOUT) {
 305                 dev_err(qproc->dev, "PBL boot timed out\n");
 306         } else if (ret != RMB_PBL_SUCCESS) {
 307                 dev_err(qproc->dev, "PBL returned unexpected status %d\n", ret);
 308                 ret = -EINVAL;
 309         } else {
 310                 ret = 0;
 311         }
 312
 313         return ret;
 314 }
 315
 316 static void q6v5proc_halt_axi_port(struct q6v5 *qproc,
 317                                    struct regmap *halt_map,
 318                                    u32 offset)
 319 {
 320         unsigned long timeout;
 321         unsigned int val;
 322         int ret;
 323
 324         /* Check if we're already idle */
 325         ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
 326         if (!ret && val)
 327                 return;
 328
 329         /* Assert halt request */
 330         regmap_write(halt_map, offset + AXI_HALTREQ_REG, 1);
 331
 332         /* Wait for halt */
 333         timeout = jiffies + msecs_to_jiffies(HALT_ACK_TIMEOUT_MS);
 334         for (;;) {
 335                 ret = regmap_read(halt_map, offset + AXI_HALTACK_REG, &val);
 336                 if (ret || val || time_after(jiffies, timeout))
 337                         break;
 338
 339                 msleep(1);
 340         }
 341
 342         ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
 343         if (ret || !val)
 344                 dev_err(qproc->dev, "port failed halt\n");
 345
 346         /* Clear halt request (port will remain halted until reset) */
 347         regmap_write(halt_map, offset + AXI_HALTREQ_REG, 0);
 348 }
 349
 350 static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw)
 351 {
 352         DEFINE_DMA_ATTRS(attrs);
 353         dma_addr_t phys;
 354         void *ptr;
 355         int ret;
 356
 357         dma_set_attr(DMA_ATTR_FORCE_CONTIGUOUS, &attrs);
 358         ptr = dma_alloc_attrs(qproc->dev, fw->size, &phys, GFP_KERNEL, &attrs);
 359         if (!ptr) {
 360                 dev_err(qproc->dev, "failed to allocate mdt buffer\n");
 361                 return -ENOMEM;
 362         }
 363
 364         memcpy(ptr, fw->data, fw->size);
 365
 366         writel(phys, qproc->rmb_base + RMB_PMI_META_DATA_REG);
 367         writel(RMB_CMD_META_DATA_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG);
 368
 369         ret = q6v5_rmb_mba_wait(qproc, RMB_MBA_META_DATA_AUTH_SUCCESS, 1000);
 370         if (ret == -ETIMEDOUT)
 371                 dev_err(qproc->dev, "MPSS header authentication timed out\n");
 372         else if (ret < 0)
 373                 dev_err(qproc->dev, "MPSS header authentication failed: %d\n", ret);
 374
 375         dma_free_attrs(qproc->dev, fw->size, ptr, phys, &attrs);
 376
 377         return ret < 0 ? ret : 0;
 378 }
 379
 380 static int q6v5_mpss_validate(struct q6v5 *qproc, const struct firmware *fw)
 381 {
 382         const struct elf32_phdr *phdrs;
 383         const struct elf32_phdr *phdr;
 384         struct elf32_hdr *ehdr;
 385         phys_addr_t boot_addr;
 386         phys_addr_t fw_addr;
 387         bool relocate;
 388         size_t size;
 389         int ret;
 390         int i;
 391
 392         ret = qcom_mdt_parse(fw, &fw_addr, NULL, &relocate);
 393         if (ret) {
 394                 dev_err(qproc->dev, "failed to parse mdt header\n");
 395                 return ret;
 396         }
 397
 398         if (relocate)
 399                 boot_addr = qproc->mpss_phys;
 400         else
 401                 boot_addr = fw_addr;
 402
 403         ehdr = (struct elf32_hdr *)fw->data;
 404         phdrs = (struct elf32_phdr *)(ehdr + 1);
 405         for (i = 0; i < ehdr->e_phnum; i++, phdr++) {
 406                 phdr = &phdrs[i];
 407
 408                 if (phdr->p_type != PT_LOAD)
 409                         continue;
 410
 411                 if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
 412                         continue;
 413
 414                 if (!phdr->p_memsz)
 415                         continue;
 416
 417                 size = readl(qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
 418                 if (!size) {
 419                         writel(boot_addr, qproc->rmb_base + RMB_PMI_CODE_START_REG);
 420                         writel(RMB_CMD_LOAD_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG);
 421                 }
 422
 423                 size += phdr->p_memsz;
 424                 writel(size, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
 425         }
 426
 427         ret = q6v5_rmb_mba_wait(qproc, RMB_MBA_AUTH_COMPLETE, 10000);
 428         if (ret == -ETIMEDOUT)
 429                 dev_err(qproc->dev, "MPSS authentication timed out\n");
 430         else if (ret < 0)
 431                 dev_err(qproc->dev, "MPSS authentication failed: %d\n", ret);
 432
 433         return ret < 0 ? ret : 0;
 434 }
 435
 436 static int q6v5_mpss_load(struct q6v5 *qproc)
 437 {
 438         const struct firmware *fw;
 439         phys_addr_t fw_addr;
 440         bool relocate;
 441         int ret;
 442
 443         ret = request_firmware(&fw, MPSS_FIRMWARE_NAME, qproc->dev);
 444         if (ret < 0) {
 445                 dev_err(qproc->dev, "unable to load " MPSS_FIRMWARE_NAME "\n");
 446                 return ret;
 447         }
 448
 449         ret = qcom_mdt_parse(fw, &fw_addr, NULL, &relocate);
 450         if (ret) {
 451                 dev_err(qproc->dev, "failed to parse mdt header\n");
 452                 goto release_firmware;
 453         }
 454
 455         if (relocate)
 456                 qproc->mpss_reloc = fw_addr;
 457
 458         /* Initialize the RMB validator */
 459         writel(0, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
 460
 461         ret = q6v5_mpss_init_image(qproc, fw);
 462         if (ret)
 463                 goto release_firmware;
 464
 465         ret = qcom_mdt_load(qproc->rproc, fw, MPSS_FIRMWARE_NAME);
 466         if (ret)
 467                 goto release_firmware;
 468
 469         ret = q6v5_mpss_validate(qproc, fw);
 470
 471 release_firmware:
 472         release_firmware(fw);
 473
 474         return ret < 0 ? ret : 0;
 475 }
 476
 477 static int q6v5_start(struct rproc *rproc)
 478 {
 479         struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
 480         int ret;
 481
 482         ret = q6v5_regulator_enable(qproc);
 483         if (ret) {
 484                 dev_err(qproc->dev, "failed to enable supplies\n");
 485                 return ret;
 486         }
 487
 488         ret = reset_control_deassert(qproc->mss_restart);
 489         if (ret) {
 490                 dev_err(qproc->dev, "failed to deassert mss restart\n");
 491                 goto disable_vdd;
 492         }
 493
 494         ret = clk_prepare_enable(qproc->ahb_clk);
 495         if (ret)
 496                 goto assert_reset;
 497
 498         ret = clk_prepare_enable(qproc->axi_clk);
 499         if (ret)
 500                 goto disable_ahb_clk;
 501
 502         ret = clk_prepare_enable(qproc->rom_clk);
 503         if (ret)
 504                 goto disable_axi_clk;
 505
 506         writel(qproc->mba_phys, qproc->rmb_base + RMB_MBA_IMAGE_REG);
 507
 508         ret = q6v5proc_reset(qproc);
 509         if (ret)
 510                 goto halt_axi_ports;
 511
 512         ret = q6v5_rmb_mba_wait(qproc, 0, 5000);
 513         if (ret == -ETIMEDOUT) {
 514                 dev_err(qproc->dev, "MBA boot timed out\n");
 515                 goto halt_axi_ports;
 516         } else if (ret != RMB_MBA_XPU_UNLOCKED &&
 517                    ret != RMB_MBA_XPU_UNLOCKED_SCRIBBLED) {
 518                 dev_err(qproc->dev, "MBA returned unexpected status %d\n", ret);
 519                 ret = -EINVAL;
 520                 goto halt_axi_ports;
 521         }
 522
 523         dev_info(qproc->dev, "MBA booted, loading mpss\n");
 524
 525         ret = q6v5_mpss_load(qproc);
 526         if (ret)
 527                 goto halt_axi_ports;
 528
 529         ret = wait_for_completion_timeout(&qproc->start_done,
 530                                           msecs_to_jiffies(5000));
 531         if (ret == 0) {
 532                 dev_err(qproc->dev, "start timed out\n");
 533                 ret = -ETIMEDOUT;
 534                 goto halt_axi_ports;
 535         }
 536
 537         qproc->running = true;
 538
 539         /* TODO: All done, release the handover resources */
 540
 541         return 0;
 542
 543 halt_axi_ports:
 544         q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6);
 545         q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
 546         q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);
 547
 548         clk_disable_unprepare(qproc->rom_clk);
 549 disable_axi_clk:
 550         clk_disable_unprepare(qproc->axi_clk);
 551 disable_ahb_clk:
 552         clk_disable_unprepare(qproc->ahb_clk);
 553 assert_reset:
 554         reset_control_assert(qproc->mss_restart);
 555 disable_vdd:
 556         q6v5_regulator_disable(qproc);
 557
 558         return ret;
 559 }
 560
 561 static int q6v5_stop(struct rproc *rproc)
 562 {
 563         struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
 564         int ret;
 565
 566         qproc->running = false;
 567
 568         qcom_smem_state_update_bits(qproc->state,
 569                                     BIT(qproc->stop_bit), BIT(qproc->stop_bit));
 570
 571         ret = wait_for_completion_timeout(&qproc->stop_done,
 572                                           msecs_to_jiffies(5000));
 573         if (ret == 0)
 574                 dev_err(qproc->dev, "timed out on wait\n");
 575
 576         qcom_smem_state_update_bits(qproc->state, BIT(qproc->stop_bit), 0);
 577
 578         q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6);
 579         q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
 580         q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);
 581
 582         reset_control_assert(qproc->mss_restart);
 583         clk_disable_unprepare(qproc->rom_clk);
 584         clk_disable_unprepare(qproc->axi_clk);
 585         clk_disable_unprepare(qproc->ahb_clk);
 586         q6v5_regulator_disable(qproc);
 587
 588         return 0;
 589 }
 590
 591 static void *q6v5_da_to_va(struct rproc *rproc, u64 da, int len)
 592 {
 593         struct q6v5 *qproc = rproc->priv;
 594         int offset;
 595
 596         offset = da - qproc->mpss_reloc;
 597         if (offset < 0 || offset + len > qproc->mpss_size)
 598                 return NULL;
 599
 600         return qproc->mpss_region + offset;
 601 }
 602
 603 static const struct rproc_ops q6v5_ops = {
 604         .start = q6v5_start,
 605         .stop = q6v5_stop,
 606         .da_to_va = q6v5_da_to_va,
 607 };
 608
 609 static irqreturn_t q6v5_wdog_interrupt(int irq, void *dev)
 610 {
 611         struct q6v5 *qproc = dev;
 612         size_t len;
 613         char *msg;
 614
 615         /* Sometimes the stop triggers a watchdog rather than a stop-ack */
 616         if (!qproc->running) {
 617                 complete(&qproc->stop_done);
 618                 return IRQ_HANDLED;
 619         }
 620
 621         msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, MPSS_CRASH_REASON_SMEM, &len);
 622         if (!IS_ERR(msg) && len > 0 && msg[0])
 623                 dev_err(qproc->dev, "watchdog received: %s\n", msg);
 624         else
 625                 dev_err(qproc->dev, "watchdog without message\n");
 626
 627         rproc_report_crash(qproc->rproc, RPROC_WATCHDOG);
 628
 629         if (!IS_ERR(msg))
 630                 msg[0] = '\0';
 631
 632         return IRQ_HANDLED;
 633 }
 634
 635 static irqreturn_t q6v5_fatal_interrupt(int irq, void *dev)
 636 {
 637         struct q6v5 *qproc = dev;
 638         size_t len;
 639         char *msg;
 640
 641         msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, MPSS_CRASH_REASON_SMEM, &len);
 642         if (!IS_ERR(msg) && len > 0 && msg[0])
 643                 dev_err(qproc->dev, "fatal error received: %s\n", msg);
 644         else
 645                 dev_err(qproc->dev, "fatal error without message\n");
 646
 647         rproc_report_crash(qproc->rproc, RPROC_FATAL_ERROR);
 648
 649         if (!IS_ERR(msg))
 650                 msg[0] = '\0';
 651
 652         return IRQ_HANDLED;
 653 }
 654
 655 static irqreturn_t q6v5_handover_interrupt(int irq, void *dev)
 656 {
 657         struct q6v5 *qproc = dev;
 658
 659         complete(&qproc->start_done);
 660         return IRQ_HANDLED;
 661 }
 662
 663 static irqreturn_t q6v5_stop_ack_interrupt(int irq, void *dev)
 664 {
 665         struct q6v5 *qproc = dev;
 666
 667         complete(&qproc->stop_done);
 668         return IRQ_HANDLED;
 669 }
 670
 671 static int q6v5_init_mem(struct q6v5 *qproc, struct platform_device *pdev)
 672 {
 673         struct of_phandle_args args;
 674         struct resource *res;
 675         int ret;
 676
 677         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qdsp6");
 678         qproc->reg_base = devm_ioremap_resource(&pdev->dev, res);
 679         if (IS_ERR(qproc->reg_base))
 680                 return PTR_ERR(qproc->reg_base);
 681
 682         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rmb");
 683         qproc->rmb_base = devm_ioremap_resource(&pdev->dev, res);
 684         if (IS_ERR(qproc->rmb_base))
 685                 return PTR_ERR(qproc->rmb_base);
 686
 687         ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
 688                                                "qcom,halt-regs", 3, 0, &args);
 689         if (ret < 0) {
 690                 dev_err(&pdev->dev, "failed to parse qcom,halt-regs\n");
 691                 return -EINVAL;
 692         }
 693
 694         qproc->halt_map = syscon_node_to_regmap(args.np);
 695         of_node_put(args.np);
 696         if (IS_ERR(qproc->halt_map))
 697                 return PTR_ERR(qproc->halt_map);
 698
 699         qproc->halt_q6 = args.args[0];
 700         qproc->halt_modem = args.args[1];
 701         qproc->halt_nc = args.args[2];
 702
 703         return 0;
 704 }
 705
 706 static int q6v5_init_clocks(struct q6v5 *qproc)
 707 {
 708         qproc->ahb_clk = devm_clk_get(qproc->dev, "iface");
 709         if (IS_ERR(qproc->ahb_clk)) {
 710                 dev_err(qproc->dev, "failed to get iface clock\n");
 711                 return PTR_ERR(qproc->ahb_clk);
 712         }
 713
 714         qproc->axi_clk = devm_clk_get(qproc->dev, "bus");
 715         if (IS_ERR(qproc->axi_clk)) {
 716                 dev_err(qproc->dev, "failed to get bus clock\n");
 717                 return PTR_ERR(qproc->axi_clk);
 718         }
 719
 720         qproc->rom_clk = devm_clk_get(qproc->dev, "mem");
 721         if (IS_ERR(qproc->rom_clk)) {
 722                 dev_err(qproc->dev, "failed to get mem clock\n");
 723                 return PTR_ERR(qproc->rom_clk);
 724         }
 725
 726         return 0;
 727 }
 728
 729 static int q6v5_init_reset(struct q6v5 *qproc)
 730 {
 731         qproc->mss_restart = devm_reset_control_get(qproc->dev, NULL);
 732         if (IS_ERR(qproc->mss_restart)) {
 733                 dev_err(qproc->dev, "failed to acquire mss restart\n");
 734                 return PTR_ERR(qproc->mss_restart);
 735         }
 736
 737         return 0;
 738 }
 739
 740 static int q6v5_request_irq(struct q6v5 *qproc,
 741                              struct platform_device *pdev,
 742                              const char *name,
 743                              irq_handler_t thread_fn)
 744 {
 745         int ret;
 746
 747         ret = platform_get_irq_byname(pdev, name);
 748         if (ret < 0) {
 749                 dev_err(&pdev->dev, "no %s IRQ defined\n", name);
 750                 return ret;
 751         }
 752
 753         ret = devm_request_threaded_irq(&pdev->dev, ret,
 754                                         NULL, thread_fn,
 755                                         IRQF_TRIGGER_RISING | IRQF_ONESHOT,
 756                                         "q6v5", qproc);
 757         if (ret)
 758                 dev_err(&pdev->dev, "request %s IRQ failed\n", name);
 759
 760         return ret;
 761 }
 762
 763 static int q6v5_alloc_memory_region(struct q6v5 *qproc)
 764 {
 765         struct device_node *child;
 766         struct device_node *node;
 767         struct resource r;
 768         int ret;
 769
 770         child = of_get_child_by_name(qproc->dev->of_node, "mba");
 771         node = of_parse_phandle(child, "memory-region", 0);
 772         ret = of_address_to_resource(node, 0, &r);
 773         if (ret) {
 774                 dev_err(qproc->dev, "unable to resolve mba region\n");
 775                 return ret;
 776         }
 777
 778         qproc->mba_phys = r.start;
 779         qproc->mba_size = resource_size(&r);
 780         qproc->mba_region = devm_ioremap_wc(qproc->dev, qproc->mba_phys, qproc->mba_size);
 781         if (!qproc->mba_region) {
 782                 dev_err(qproc->dev, "unable to map memory region: %pa+%zx\n",
 783                         &r.start, qproc->mba_size);
 784                 return -EBUSY;
 785         }
 786
 787         child = of_get_child_by_name(qproc->dev->of_node, "mpss");
 788         node = of_parse_phandle(child, "memory-region", 0);
 789         ret = of_address_to_resource(node, 0, &r);
 790         if (ret) {
 791                 dev_err(qproc->dev, "unable to resolve mpss region\n");
 792                 return ret;
 793         }
 794
 795         qproc->mpss_phys = qproc->mpss_reloc = r.start;
 796         qproc->mpss_size = resource_size(&r);
 797         qproc->mpss_region = devm_ioremap_wc(qproc->dev, qproc->mpss_phys, qproc->mpss_size);
 798         if (!qproc->mpss_region) {
 799                 dev_err(qproc->dev, "unable to map memory region: %pa+%zx\n",
 800                         &r.start, qproc->mpss_size);
 801                 return -EBUSY;
 802         }
 803
 804         return 0;
 805 }
 806
 807 static int q6v5_probe(struct platform_device *pdev)
 808 {
 809         struct q6v5 *qproc;
 810         struct rproc *rproc;
 811         int ret;
 812
 813         rproc = rproc_alloc(&pdev->dev, pdev->name, &q6v5_ops,
 814                             MBA_FIRMWARE_NAME, sizeof(*qproc));
 815         if (!rproc) {
 816                 dev_err(&pdev->dev, "failed to allocate rproc\n");
 817                 return -ENOMEM;
 818         }
 819
 820         rproc->fw_ops = &q6v5_fw_ops;
 821
 822         qproc = (struct q6v5 *)rproc->priv;
 823         qproc->dev = &pdev->dev;
 824         qproc->rproc = rproc;
 825         platform_set_drvdata(pdev, qproc);
 826
 827         init_completion(&qproc->start_done);
 828         init_completion(&qproc->stop_done);
 829
 830         ret = q6v5_init_mem(qproc, pdev);
 831         if (ret)
 832                 goto free_rproc;
 833
 834         ret = q6v5_alloc_memory_region(qproc);
 835         if (ret)
 836                 goto free_rproc;
 837
 838         ret = q6v5_init_clocks(qproc);
 839         if (ret)
 840                 goto free_rproc;
 841
 842         ret = q6v5_regulator_init(qproc);
 843         if (ret)
 844                 goto free_rproc;
 845
 846         ret = q6v5_init_reset(qproc);
 847         if (ret)
 848                 goto free_rproc;
 849
 850         ret = q6v5_request_irq(qproc, pdev, "wdog", q6v5_wdog_interrupt);
 851         if (ret < 0)
 852                 goto free_rproc;
 853
 854         ret = q6v5_request_irq(qproc, pdev, "fatal", q6v5_fatal_interrupt);
 855         if (ret < 0)
 856                 goto free_rproc;
 857
 858         ret = q6v5_request_irq(qproc, pdev, "handover", q6v5_handover_interrupt);
 859         if (ret < 0)
 860                 goto free_rproc;
 861
 862         ret = q6v5_request_irq(qproc, pdev, "stop-ack", q6v5_stop_ack_interrupt);
 863         if (ret < 0)
 864                 goto free_rproc;
 865
 866         qproc->state = qcom_smem_state_get(&pdev->dev, "stop", &qproc->stop_bit);
 867         if (IS_ERR(qproc->state))
 868                 goto free_rproc;
 869
 870         ret = rproc_add(rproc);
 871         if (ret)
 872                 goto free_rproc;
 873
 874         return 0;
 875
 876 free_rproc:
 877         rproc_put(rproc);
 878
 879         return ret;
 880 }
 881
 882 static int q6v5_remove(struct platform_device *pdev)
 883 {
 884         struct q6v5 *qproc = platform_get_drvdata(pdev);
 885
 886         rproc_del(qproc->rproc);
 887         rproc_put(qproc->rproc);
 888
 889         return 0;
 890 }
 891
 892 static const struct of_device_id q6v5_of_match[] = {
 893         { .compatible = "qcom,q6v5-pil", },
 894         { },
 895 };
 896
 897 static struct platform_driver q6v5_driver = {
 898         .probe = q6v5_probe,
 899         .remove = q6v5_remove,
 900         .driver = {
 901                 .name = "qcom-q6v5-pil",
 902                 .of_match_table = q6v5_of_match,
 903         },
 904 };
 905 module_platform_driver(q6v5_driver);
 906
 907 MODULE_DESCRIPTION("Peripheral Image Loader for Hexagon");
 908 MODULE_LICENSE("GPL v2");