linux/drivers/mmc/host/tmio_mmc_core.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Driver for the MMC / SD / SDIO IP found in:
   4 *
   5 * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
   6 *
   7 * Copyright (C) 2015-19 Renesas Electronics Corporation
   8 * Copyright (C) 2016-19 Sang Engineering, Wolfram Sang
   9 * Copyright (C) 2017 Horms Solutions, Simon Horman
  10 * Copyright (C) 2011 Guennadi Liakhovetski
  11 * Copyright (C) 2007 Ian Molton
  12 * Copyright (C) 2004 Ian Molton
  13 *
  14 * This driver draws mainly on scattered spec sheets, Reverse engineering
  15 * of the toshiba e800  SD driver and some parts of the 2.4 ASIC3 driver (4 bit
  16 * support). (Further 4 bit support from a later datasheet).
  17 *
  18 * TODO:
  19 *   Investigate using a workqueue for PIO transfers
  20 *   Eliminate FIXMEs
  21 *   Better Power management
  22 *   Handle MMC errors better
  23 *   double buffer support
  24 *
  25 */
  26
  27#include <linux/delay.h>
  28#include <linux/device.h>
  29#include <linux/dma-mapping.h>
  30#include <linux/highmem.h>
  31#include <linux/interrupt.h>
  32#include <linux/io.h>
  33#include <linux/irq.h>
  34#include <linux/mfd/tmio.h>
  35#include <linux/mmc/card.h>
  36#include <linux/mmc/host.h>
  37#include <linux/mmc/mmc.h>
  38#include <linux/mmc/slot-gpio.h>
  39#include <linux/module.h>
  40#include <linux/pagemap.h>
  41#include <linux/platform_device.h>
  42#include <linux/pm_qos.h>
  43#include <linux/pm_runtime.h>
  44#include <linux/regulator/consumer.h>
  45#include <linux/mmc/sdio.h>
  46#include <linux/scatterlist.h>
  47#include <linux/sizes.h>
  48#include <linux/spinlock.h>
  49#include <linux/workqueue.h>
  50
  51#include "tmio_mmc.h"
  52
  53static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
  54                                      struct mmc_data *data)
  55{
  56        if (host->dma_ops)
  57                host->dma_ops->start(host, data);
  58}
  59
  60static inline void tmio_mmc_end_dma(struct tmio_mmc_host *host)
  61{
  62        if (host->dma_ops && host->dma_ops->end)
  63                host->dma_ops->end(host);
  64}
  65
  66static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
  67{
  68        if (host->dma_ops)
  69                host->dma_ops->enable(host, enable);
  70}
  71
  72static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
  73                                        struct tmio_mmc_data *pdata)
  74{
  75        if (host->dma_ops) {
  76                host->dma_ops->request(host, pdata);
  77        } else {
  78                host->chan_tx = NULL;
  79                host->chan_rx = NULL;
  80        }
  81}
  82
  83static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
  84{
  85        if (host->dma_ops)
  86                host->dma_ops->release(host);
  87}
  88
  89static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
  90{
  91        if (host->dma_ops)
  92                host->dma_ops->abort(host);
  93}
  94
  95static inline void tmio_mmc_dataend_dma(struct tmio_mmc_host *host)
  96{
  97        if (host->dma_ops)
  98                host->dma_ops->dataend(host);
  99}
 100
 101void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
 102{
 103        host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ);
 104        sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
 105}
 106EXPORT_SYMBOL_GPL(tmio_mmc_enable_mmc_irqs);
 107
 108void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
 109{
 110        host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ);
 111        sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
 112}
 113EXPORT_SYMBOL_GPL(tmio_mmc_disable_mmc_irqs);
 114
 115static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i)
 116{
 117        sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, ~i);
 118}
 119
 120static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data)
 121{
 122        host->sg_len = data->sg_len;
 123        host->sg_ptr = data->sg;
 124        host->sg_orig = data->sg;
 125        host->sg_off = 0;
 126}
 127
 128static int tmio_mmc_next_sg(struct tmio_mmc_host *host)
 129{
 130        host->sg_ptr = sg_next(host->sg_ptr);
 131        host->sg_off = 0;
 132        return --host->sg_len;
 133}
 134
 135#define CMDREQ_TIMEOUT  5000
 136
 137static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
 138{
 139        struct tmio_mmc_host *host = mmc_priv(mmc);
 140
 141        if (enable && !host->sdio_irq_enabled) {
 142                u16 sdio_status;
 143
 144                /* Keep device active while SDIO irq is enabled */
 145                pm_runtime_get_sync(mmc_dev(mmc));
 146
 147                host->sdio_irq_enabled = true;
 148                host->sdio_irq_mask = TMIO_SDIO_MASK_ALL & ~TMIO_SDIO_STAT_IOIRQ;
 149
 150                /* Clear obsolete interrupts before enabling */
 151                sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS) & ~TMIO_SDIO_MASK_ALL;
 152                if (host->pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS)
 153                        sdio_status |= TMIO_SDIO_SETBITS_MASK;
 154                sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
 155
 156                sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
 157        } else if (!enable && host->sdio_irq_enabled) {
 158                host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
 159                sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
 160
 161                host->sdio_irq_enabled = false;
 162                pm_runtime_mark_last_busy(mmc_dev(mmc));
 163                pm_runtime_put_autosuspend(mmc_dev(mmc));
 164        }
 165}
 166
 167static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host,
 168                                   unsigned char bus_width)
 169{
 170        u16 reg = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT)
 171                                & ~(CARD_OPT_WIDTH | CARD_OPT_WIDTH8);
 172
 173        /* reg now applies to MMC_BUS_WIDTH_4 */
 174        if (bus_width == MMC_BUS_WIDTH_1)
 175                reg |= CARD_OPT_WIDTH;
 176        else if (bus_width == MMC_BUS_WIDTH_8)
 177                reg |= CARD_OPT_WIDTH8;
 178
 179        sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, reg);
 180}
 181
 182static void tmio_mmc_reset(struct tmio_mmc_host *host)
 183{
 184        /* FIXME - should we set stop clock reg here */
 185        sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
 186        usleep_range(10000, 11000);
 187        sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
 188        usleep_range(10000, 11000);
 189
 190        tmio_mmc_abort_dma(host);
 191
 192        if (host->reset)
 193                host->reset(host);
 194
 195        sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask_all);
 196        host->sdcard_irq_mask = host->sdcard_irq_mask_all;
 197
 198        tmio_mmc_set_bus_width(host, host->mmc->ios.bus_width);
 199
 200        if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) {
 201                sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
 202                sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
 203        }
 204
 205        if (host->mmc->card)
 206                mmc_retune_needed(host->mmc);
 207}
 208
 209static void tmio_mmc_reset_work(struct work_struct *work)
 210{
 211        struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
 212                                                  delayed_reset_work.work);
 213        struct mmc_request *mrq;
 214        unsigned long flags;
 215
 216        spin_lock_irqsave(&host->lock, flags);
 217        mrq = host->mrq;
 218
 219        /*
 220         * is request already finished? Since we use a non-blocking
 221         * cancel_delayed_work(), it can happen, that a .set_ios() call preempts
 222         * us, so, have to check for IS_ERR(host->mrq)
 223         */
 224        if (IS_ERR_OR_NULL(mrq) ||
 225            time_is_after_jiffies(host->last_req_ts +
 226                                  msecs_to_jiffies(CMDREQ_TIMEOUT))) {
 227                spin_unlock_irqrestore(&host->lock, flags);
 228                return;
 229        }
 230
 231        dev_warn(&host->pdev->dev,
 232                 "timeout waiting for hardware interrupt (CMD%u)\n",
 233                 mrq->cmd->opcode);
 234
 235        if (host->data)
 236                host->data->error = -ETIMEDOUT;
 237        else if (host->cmd)
 238                host->cmd->error = -ETIMEDOUT;
 239        else
 240                mrq->cmd->error = -ETIMEDOUT;
 241
 242        host->cmd = NULL;
 243        host->data = NULL;
 244
 245        spin_unlock_irqrestore(&host->lock, flags);
 246
 247        tmio_mmc_reset(host);
 248
 249        /* Ready for new calls */
 250        host->mrq = NULL;
 251        mmc_request_done(host->mmc, mrq);
 252}
 253
 254/* These are the bitmasks the tmio chip requires to implement the MMC response
 255 * types. Note that R1 and R6 are the same in this scheme. */
 256#define APP_CMD        0x0040
 257#define RESP_NONE      0x0300
 258#define RESP_R1        0x0400
 259#define RESP_R1B       0x0500
 260#define RESP_R2        0x0600
 261#define RESP_R3        0x0700
 262#define DATA_PRESENT   0x0800
 263#define TRANSFER_READ  0x1000
 264#define TRANSFER_MULTI 0x2000
 265#define SECURITY_CMD   0x4000
 266#define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */
 267
 268static int tmio_mmc_start_command(struct tmio_mmc_host *host,
 269                                  struct mmc_command *cmd)
 270{
 271        struct mmc_data *data = host->data;
 272        int c = cmd->opcode;
 273
 274        switch (mmc_resp_type(cmd)) {
 275        case MMC_RSP_NONE: c |= RESP_NONE; break;
 276        case MMC_RSP_R1:
 277        case MMC_RSP_R1_NO_CRC:
 278                           c |= RESP_R1;   break;
 279        case MMC_RSP_R1B:  c |= RESP_R1B;  break;
 280        case MMC_RSP_R2:   c |= RESP_R2;   break;
 281        case MMC_RSP_R3:   c |= RESP_R3;   break;
 282        default:
 283                pr_debug("Unknown response type %d\n", mmc_resp_type(cmd));
 284                return -EINVAL;
 285        }
 286
 287        host->cmd = cmd;
 288
 289/* FIXME - this seems to be ok commented out but the spec suggest this bit
 290 *         should be set when issuing app commands.
 291 *      if(cmd->flags & MMC_FLAG_ACMD)
 292 *              c |= APP_CMD;
 293 */
 294        if (data) {
 295                c |= DATA_PRESENT;
 296                if (data->blocks > 1) {
 297                        sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_SEC);
 298                        c |= TRANSFER_MULTI;
 299
 300                        /*
 301                         * Disable auto CMD12 at IO_RW_EXTENDED and
 302                         * SET_BLOCK_COUNT when doing multiple block transfer
 303                         */
 304                        if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) &&
 305                            (cmd->opcode == SD_IO_RW_EXTENDED || host->mrq->sbc))
 306                                c |= NO_CMD12_ISSUE;
 307                }
 308                if (data->flags & MMC_DATA_READ)
 309                        c |= TRANSFER_READ;
 310        }
 311
 312        tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_CMD);
 313
 314        /* Fire off the command */
 315        sd_ctrl_write32_as_16_and_16(host, CTL_ARG_REG, cmd->arg);
 316        sd_ctrl_write16(host, CTL_SD_CMD, c);
 317
 318        return 0;
 319}
 320
 321static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
 322                                   unsigned short *buf,
 323                                   unsigned int count)
 324{
 325        int is_read = host->data->flags & MMC_DATA_READ;
 326        u8  *buf8;
 327
 328        /*
 329         * Transfer the data
 330         */
 331        if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) {
 332                u32 data = 0;
 333                u32 *buf32 = (u32 *)buf;
 334
 335                if (is_read)
 336                        sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, buf32,
 337                                           count >> 2);
 338                else
 339                        sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, buf32,
 340                                            count >> 2);
 341
 342                /* if count was multiple of 4 */
 343                if (!(count & 0x3))
 344                        return;
 345
 346                buf32 += count >> 2;
 347                count %= 4;
 348
 349                if (is_read) {
 350                        sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, &data, 1);
 351                        memcpy(buf32, &data, count);
 352                } else {
 353                        memcpy(&data, buf32, count);
 354                        sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, &data, 1);
 355                }
 356
 357                return;
 358        }
 359
 360        if (is_read)
 361                sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
 362        else
 363                sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
 364
 365        /* if count was even number */
 366        if (!(count & 0x1))
 367                return;
 368
 369        /* if count was odd number */
 370        buf8 = (u8 *)(buf + (count >> 1));
 371
 372        /*
 373         * FIXME
 374         *
 375         * driver and this function are assuming that
 376         * it is used as little endian
 377         */
 378        if (is_read)
 379                *buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff;
 380        else
 381                sd_ctrl_write16(host, CTL_SD_DATA_PORT, *buf8);
 382}
 383
 384/*
 385 * This chip always returns (at least?) as much data as you ask for.
 386 * I'm unsure what happens if you ask for less than a block. This should be
 387 * looked into to ensure that a funny length read doesn't hose the controller.
 388 */
 389static void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
 390{
 391        struct mmc_data *data = host->data;
 392        void *sg_virt;
 393        unsigned short *buf;
 394        unsigned int count;
 395        unsigned long flags;
 396
 397        if (host->dma_on) {
 398                pr_err("PIO IRQ in DMA mode!\n");
 399                return;
 400        } else if (!data) {
 401                pr_debug("Spurious PIO IRQ\n");
 402                return;
 403        }
 404
 405        sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags);
 406        buf = (unsigned short *)(sg_virt + host->sg_off);
 407
 408        count = host->sg_ptr->length - host->sg_off;
 409        if (count > data->blksz)
 410                count = data->blksz;
 411
 412        pr_debug("count: %08x offset: %08x flags %08x\n",
 413                 count, host->sg_off, data->flags);
 414
 415        /* Transfer the data */
 416        tmio_mmc_transfer_data(host, buf, count);
 417
 418        host->sg_off += count;
 419
 420        tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt);
 421
 422        if (host->sg_off == host->sg_ptr->length)
 423                tmio_mmc_next_sg(host);
 424}
 425
 426static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host)
 427{
 428        if (host->sg_ptr == &host->bounce_sg) {
 429                unsigned long flags;
 430                void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags);
 431
 432                memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length);
 433                tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr);
 434        }
 435}
 436
 437/* needs to be called with host->lock held */
 438void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
 439{
 440        struct mmc_data *data = host->data;
 441        struct mmc_command *stop;
 442
 443        host->data = NULL;
 444
 445        if (!data) {
 446                dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
 447                return;
 448        }
 449        stop = data->stop;
 450
 451        /* FIXME - return correct transfer count on errors */
 452        if (!data->error)
 453                data->bytes_xfered = data->blocks * data->blksz;
 454        else
 455                data->bytes_xfered = 0;
 456
 457        pr_debug("Completed data request\n");
 458
 459        /*
 460         * FIXME: other drivers allow an optional stop command of any given type
 461         *        which we dont do, as the chip can auto generate them.
 462         *        Perhaps we can be smarter about when to use auto CMD12 and
 463         *        only issue the auto request when we know this is the desired
 464         *        stop command, allowing fallback to the stop command the
 465         *        upper layers expect. For now, we do what works.
 466         */
 467
 468        if (data->flags & MMC_DATA_READ) {
 469                if (host->dma_on)
 470                        tmio_mmc_check_bounce_buffer(host);
 471                dev_dbg(&host->pdev->dev, "Complete Rx request %p\n",
 472                        host->mrq);
 473        } else {
 474                dev_dbg(&host->pdev->dev, "Complete Tx request %p\n",
 475                        host->mrq);
 476        }
 477
 478        if (stop && !host->mrq->sbc) {
 479                if (stop->opcode != MMC_STOP_TRANSMISSION || stop->arg)
 480                        dev_err(&host->pdev->dev, "unsupported stop: CMD%u,0x%x. We did CMD12,0\n",
 481                                stop->opcode, stop->arg);
 482
 483                /* fill in response from auto CMD12 */
 484                stop->resp[0] = sd_ctrl_read16_and_16_as_32(host, CTL_RESPONSE);
 485
 486                sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0);
 487        }
 488
 489        schedule_work(&host->done);
 490}
 491EXPORT_SYMBOL_GPL(tmio_mmc_do_data_irq);
 492
 493static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat)
 494{
 495        struct mmc_data *data;
 496
 497        spin_lock(&host->lock);
 498        data = host->data;
 499
 500        if (!data)
 501                goto out;
 502
 503        if (stat & TMIO_STAT_DATATIMEOUT)
 504                data->error = -ETIMEDOUT;
 505        else if (stat & TMIO_STAT_CRCFAIL || stat & TMIO_STAT_STOPBIT_ERR ||
 506                 stat & TMIO_STAT_TXUNDERRUN)
 507                data->error = -EILSEQ;
 508        if (host->dma_on && (data->flags & MMC_DATA_WRITE)) {
 509                u32 status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS);
 510                bool done = false;
 511
 512                /*
 513                 * Has all data been written out yet? Testing on SuperH showed,
 514                 * that in most cases the first interrupt comes already with the
 515                 * BUSY status bit clear, but on some operations, like mount or
 516                 * in the beginning of a write / sync / umount, there is one
 517                 * DATAEND interrupt with the BUSY bit set, in this cases
 518                 * waiting for one more interrupt fixes the problem.
 519                 */
 520                if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) {
 521                        if (status & TMIO_STAT_SCLKDIVEN)
 522                                done = true;
 523                } else {
 524                        if (!(status & TMIO_STAT_CMD_BUSY))
 525                                done = true;
 526                }
 527
 528                if (done) {
 529                        tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
 530                        tmio_mmc_dataend_dma(host);
 531                }
 532        } else if (host->dma_on && (data->flags & MMC_DATA_READ)) {
 533                tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
 534                tmio_mmc_dataend_dma(host);
 535        } else {
 536                tmio_mmc_do_data_irq(host);
 537                tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP);
 538        }
 539out:
 540        spin_unlock(&host->lock);
 541}
 542
 543static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat)
 544{
 545        struct mmc_command *cmd = host->cmd;
 546        int i, addr;
 547
 548        spin_lock(&host->lock);
 549
 550        if (!host->cmd) {
 551                pr_debug("Spurious CMD irq\n");
 552                goto out;
 553        }
 554
 555        /* This controller is sicker than the PXA one. Not only do we need to
 556         * drop the top 8 bits of the first response word, we also need to
 557         * modify the order of the response for short response command types.
 558         */
 559
 560        for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
 561                cmd->resp[i] = sd_ctrl_read16_and_16_as_32(host, addr);
 562
 563        if (cmd->flags &  MMC_RSP_136) {
 564                cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
 565                cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24);
 566                cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24);
 567                cmd->resp[3] <<= 8;
 568        } else if (cmd->flags & MMC_RSP_R3) {
 569                cmd->resp[0] = cmd->resp[3];
 570        }
 571
 572        if (stat & TMIO_STAT_CMDTIMEOUT)
 573                cmd->error = -ETIMEDOUT;
 574        else if ((stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) ||
 575                 stat & TMIO_STAT_STOPBIT_ERR ||
 576                 stat & TMIO_STAT_CMD_IDX_ERR)
 577                cmd->error = -EILSEQ;
 578
 579        /* If there is data to handle we enable data IRQs here, and
 580         * we will ultimatley finish the request in the data_end handler.
 581         * If theres no data or we encountered an error, finish now.
 582         */
 583        if (host->data && (!cmd->error || cmd->error == -EILSEQ)) {
 584                if (host->data->flags & MMC_DATA_READ) {
 585                        if (!host->dma_on) {
 586                                tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP);
 587                        } else {
 588                                tmio_mmc_disable_mmc_irqs(host,
 589                                                          TMIO_MASK_READOP);
 590                                tasklet_schedule(&host->dma_issue);
 591                        }
 592                } else {
 593                        if (!host->dma_on) {
 594                                tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP);
 595                        } else {
 596                                tmio_mmc_disable_mmc_irqs(host,
 597                                                          TMIO_MASK_WRITEOP);
 598                                tasklet_schedule(&host->dma_issue);
 599                        }
 600                }
 601        } else {
 602                schedule_work(&host->done);
 603        }
 604
 605out:
 606        spin_unlock(&host->lock);
 607}
 608
 609static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host,
 610                                       int ireg, int status)
 611{
 612        struct mmc_host *mmc = host->mmc;
 613
 614        /* Card insert / remove attempts */
 615        if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) {
 616                tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT |
 617                        TMIO_STAT_CARD_REMOVE);
 618                if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) ||
 619                     ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) &&
 620                    !work_pending(&mmc->detect.work))
 621                        mmc_detect_change(host->mmc, msecs_to_jiffies(100));
 622                return true;
 623        }
 624
 625        return false;
 626}
 627
 628static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host, int ireg,
 629                                  int status)
 630{
 631        /* Command completion */
 632        if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) {
 633                tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CMDRESPEND |
 634                                      TMIO_STAT_CMDTIMEOUT);
 635                tmio_mmc_cmd_irq(host, status);
 636                return true;
 637        }
 638
 639        /* Data transfer */
 640        if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) {
 641                tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
 642                tmio_mmc_pio_irq(host);
 643                return true;
 644        }
 645
 646        /* Data transfer completion */
 647        if (ireg & TMIO_STAT_DATAEND) {
 648                tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND);
 649                tmio_mmc_data_irq(host, status);
 650                return true;
 651        }
 652
 653        return false;
 654}
 655
 656static bool __tmio_mmc_sdio_irq(struct tmio_mmc_host *host)
 657{
 658        struct mmc_host *mmc = host->mmc;
 659        struct tmio_mmc_data *pdata = host->pdata;
 660        unsigned int ireg, status;
 661        unsigned int sdio_status;
 662
 663        if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
 664                return false;
 665
 666        status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
 667        ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdio_irq_mask;
 668
 669        sdio_status = status & ~TMIO_SDIO_MASK_ALL;
 670        if (pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS)
 671                sdio_status |= TMIO_SDIO_SETBITS_MASK;
 672
 673        sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
 674
 675        if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ)
 676                mmc_signal_sdio_irq(mmc);
 677
 678        return ireg;
 679}
 680
 681irqreturn_t tmio_mmc_irq(int irq, void *devid)
 682{
 683        struct tmio_mmc_host *host = devid;
 684        unsigned int ireg, status;
 685
 686        status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS);
 687        ireg = status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask;
 688
 689        /* Clear the status except the interrupt status */
 690        sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, TMIO_MASK_IRQ);
 691
 692        if (__tmio_mmc_card_detect_irq(host, ireg, status))
 693                return IRQ_HANDLED;
 694        if (__tmio_mmc_sdcard_irq(host, ireg, status))
 695                return IRQ_HANDLED;
 696
 697        if (__tmio_mmc_sdio_irq(host))
 698                return IRQ_HANDLED;
 699
 700        return IRQ_NONE;
 701}
 702EXPORT_SYMBOL_GPL(tmio_mmc_irq);
 703
 704static int tmio_mmc_start_data(struct tmio_mmc_host *host,
 705                               struct mmc_data *data)
 706{
 707        struct tmio_mmc_data *pdata = host->pdata;
 708
 709        pr_debug("setup data transfer: blocksize %08x  nr_blocks %d\n",
 710                 data->blksz, data->blocks);
 711
 712        /* Some hardware cannot perform 2 byte requests in 4/8 bit mode */
 713        if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 ||
 714            host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) {
 715                int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
 716
 717                if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
 718                        pr_err("%s: %d byte block unsupported in 4/8 bit mode\n",
 719                               mmc_hostname(host->mmc), data->blksz);
 720                        return -EINVAL;
 721                }
 722        }
 723
 724        tmio_mmc_init_sg(host, data);
 725        host->data = data;
 726        host->dma_on = false;
 727
 728        /* Set transfer length / blocksize */
 729        sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz);
 730        if (host->mmc->max_blk_count >= SZ_64K)
 731                sd_ctrl_write32(host, CTL_XFER_BLK_COUNT, data->blocks);
 732        else
 733                sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks);
 734
 735        tmio_mmc_start_dma(host, data);
 736
 737        return 0;
 738}
 739
 740static void tmio_process_mrq(struct tmio_mmc_host *host,
 741                             struct mmc_request *mrq)
 742{
 743        struct mmc_command *cmd;
 744        int ret;
 745
 746        if (mrq->sbc && host->cmd != mrq->sbc) {
 747                cmd = mrq->sbc;
 748        } else {
 749                cmd = mrq->cmd;
 750                if (mrq->data) {
 751                        ret = tmio_mmc_start_data(host, mrq->data);
 752                        if (ret)
 753                                goto fail;
 754                }
 755        }
 756
 757        ret = tmio_mmc_start_command(host, cmd);
 758        if (ret)
 759                goto fail;
 760
 761        schedule_delayed_work(&host->delayed_reset_work,
 762                              msecs_to_jiffies(CMDREQ_TIMEOUT));
 763        return;
 764
 765fail:
 766        host->mrq = NULL;
 767        mrq->cmd->error = ret;
 768        mmc_request_done(host->mmc, mrq);
 769}
 770
 771/* Process requests from the MMC layer */
 772static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 773{
 774        struct tmio_mmc_host *host = mmc_priv(mmc);
 775        unsigned long flags;
 776
 777        spin_lock_irqsave(&host->lock, flags);
 778
 779        if (host->mrq) {
 780                pr_debug("request not null\n");
 781                if (IS_ERR(host->mrq)) {
 782                        spin_unlock_irqrestore(&host->lock, flags);
 783                        mrq->cmd->error = -EAGAIN;
 784                        mmc_request_done(mmc, mrq);
 785                        return;
 786                }
 787        }
 788
 789        host->last_req_ts = jiffies;
 790        wmb();
 791        host->mrq = mrq;
 792
 793        spin_unlock_irqrestore(&host->lock, flags);
 794
 795        tmio_process_mrq(host, mrq);
 796}
 797
 798static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
 799{
 800        struct mmc_request *mrq;
 801        unsigned long flags;
 802
 803        spin_lock_irqsave(&host->lock, flags);
 804
 805        tmio_mmc_end_dma(host);
 806
 807        mrq = host->mrq;
 808        if (IS_ERR_OR_NULL(mrq)) {
 809                spin_unlock_irqrestore(&host->lock, flags);
 810                return;
 811        }
 812
 813        /* If not SET_BLOCK_COUNT, clear old data */
 814        if (host->cmd != mrq->sbc) {
 815                host->cmd = NULL;
 816                host->data = NULL;
 817                host->mrq = NULL;
 818        }
 819
 820        cancel_delayed_work(&host->delayed_reset_work);
 821
 822        spin_unlock_irqrestore(&host->lock, flags);
 823
 824        if (mrq->cmd->error || (mrq->data && mrq->data->error)) {
 825                tmio_mmc_ack_mmc_irqs(host, TMIO_MASK_IRQ); /* Clear all */
 826                tmio_mmc_abort_dma(host);
 827        }
 828
 829        /* Error means retune, but executed command was still successful */
 830        if (host->check_retune && host->check_retune(host, mrq))
 831                mmc_retune_needed(host->mmc);
 832
 833        /* If SET_BLOCK_COUNT, continue with main command */
 834        if (host->mrq && !mrq->cmd->error) {
 835                tmio_process_mrq(host, mrq);
 836                return;
 837        }
 838
 839        if (host->fixup_request)
 840                host->fixup_request(host, mrq);
 841
 842        mmc_request_done(host->mmc, mrq);
 843}
 844
 845static void tmio_mmc_done_work(struct work_struct *work)
 846{
 847        struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
 848                                                  done);
 849        tmio_mmc_finish_request(host);
 850}
 851
 852static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd)
 853{
 854        struct mmc_host *mmc = host->mmc;
 855        int ret = 0;
 856
 857        /* .set_ios() is returning void, so, no chance to report an error */
 858
 859        if (host->set_pwr)
 860                host->set_pwr(host->pdev, 1);
 861
 862        if (!IS_ERR(mmc->supply.vmmc)) {
 863                ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
 864                /*
 865                 * Attention: empiric value. With a b43 WiFi SDIO card this
 866                 * delay proved necessary for reliable card-insertion probing.
 867                 * 100us were not enough. Is this the same 140us delay, as in
 868                 * tmio_mmc_set_ios()?
 869                 */
 870                usleep_range(200, 300);
 871        }
 872        /*
 873         * It seems, VccQ should be switched on after Vcc, this is also what the
 874         * omap_hsmmc.c driver does.
 875         */
 876        if (!IS_ERR(mmc->supply.vqmmc) && !ret) {
 877                ret = regulator_enable(mmc->supply.vqmmc);
 878                usleep_range(200, 300);
 879        }
 880
 881        if (ret < 0)
 882                dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n",
 883                        ret);
 884}
 885
 886static void tmio_mmc_power_off(struct tmio_mmc_host *host)
 887{
 888        struct mmc_host *mmc = host->mmc;
 889
 890        if (!IS_ERR(mmc->supply.vqmmc))
 891                regulator_disable(mmc->supply.vqmmc);
 892
 893        if (!IS_ERR(mmc->supply.vmmc))
 894                mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
 895
 896        if (host->set_pwr)
 897                host->set_pwr(host->pdev, 0);
 898}
 899
 900static unsigned int tmio_mmc_get_timeout_cycles(struct tmio_mmc_host *host)
 901{
 902        u16 val = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT);
 903
 904        val = (val & CARD_OPT_TOP_MASK) >> CARD_OPT_TOP_SHIFT;
 905        return 1 << (13 + val);
 906}
 907
 908static void tmio_mmc_max_busy_timeout(struct tmio_mmc_host *host)
 909{
 910        unsigned int clk_rate = host->mmc->actual_clock ?: host->mmc->f_max;
 911
 912        host->mmc->max_busy_timeout = host->get_timeout_cycles(host) /
 913                                      (clk_rate / MSEC_PER_SEC);
 914}
 915
 916/* Set MMC clock / power.
 917 * Note: This controller uses a simple divider scheme therefore it cannot
 918 * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
 919 * MMC wont run that fast, it has to be clocked at 12MHz which is the next
 920 * slowest setting.
 921 */
 922static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 923{
 924        struct tmio_mmc_host *host = mmc_priv(mmc);
 925        struct device *dev = &host->pdev->dev;
 926        unsigned long flags;
 927
 928        mutex_lock(&host->ios_lock);
 929
 930        spin_lock_irqsave(&host->lock, flags);
 931        if (host->mrq) {
 932                if (IS_ERR(host->mrq)) {
 933                        dev_dbg(dev,
 934                                "%s.%d: concurrent .set_ios(), clk %u, mode %u\n",
 935                                current->comm, task_pid_nr(current),
 936                                ios->clock, ios->power_mode);
 937                        host->mrq = ERR_PTR(-EINTR);
 938                } else {
 939                        dev_dbg(dev,
 940                                "%s.%d: CMD%u active since %lu, now %lu!\n",
 941                                current->comm, task_pid_nr(current),
 942                                host->mrq->cmd->opcode, host->last_req_ts,
 943                                jiffies);
 944                }
 945                spin_unlock_irqrestore(&host->lock, flags);
 946
 947                mutex_unlock(&host->ios_lock);
 948                return;
 949        }
 950
 951        host->mrq = ERR_PTR(-EBUSY);
 952
 953        spin_unlock_irqrestore(&host->lock, flags);
 954
 955        switch (ios->power_mode) {
 956        case MMC_POWER_OFF:
 957                tmio_mmc_power_off(host);
 958                /* For R-Car Gen2+, we need to reset SDHI specific SCC */
 959                if (host->pdata->flags & TMIO_MMC_MIN_RCAR2)
 960                        host->reset(host);
 961                host->set_clock(host, 0);
 962                break;
 963        case MMC_POWER_UP:
 964                tmio_mmc_power_on(host, ios->vdd);
 965                host->set_clock(host, ios->clock);
 966                tmio_mmc_set_bus_width(host, ios->bus_width);
 967                break;
 968        case MMC_POWER_ON:
 969                host->set_clock(host, ios->clock);
 970                tmio_mmc_set_bus_width(host, ios->bus_width);
 971                break;
 972        }
 973
 974        if (host->pdata->flags & TMIO_MMC_USE_BUSY_TIMEOUT)
 975                tmio_mmc_max_busy_timeout(host);
 976
 977        /* Let things settle. delay taken from winCE driver */
 978        usleep_range(140, 200);
 979        if (PTR_ERR(host->mrq) == -EINTR)
 980                dev_dbg(&host->pdev->dev,
 981                        "%s.%d: IOS interrupted: clk %u, mode %u",
 982                        current->comm, task_pid_nr(current),
 983                        ios->clock, ios->power_mode);
 984        host->mrq = NULL;
 985
 986        host->clk_cache = ios->clock;
 987
 988        mutex_unlock(&host->ios_lock);
 989}
 990
 991static int tmio_mmc_get_ro(struct mmc_host *mmc)
 992{
 993        struct tmio_mmc_host *host = mmc_priv(mmc);
 994
 995        return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) &
 996                 TMIO_STAT_WRPROTECT);
 997}
 998
 999static int tmio_mmc_get_cd(struct mmc_host *mmc)
1000{
1001        struct tmio_mmc_host *host = mmc_priv(mmc);
1002
1003        return !!(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) &
1004                  TMIO_STAT_SIGSTATE);
1005}
1006
1007static int tmio_multi_io_quirk(struct mmc_card *card,
1008                               unsigned int direction, int blk_size)
1009{
1010        struct tmio_mmc_host *host = mmc_priv(card->host);
1011
1012        if (host->multi_io_quirk)
1013                return host->multi_io_quirk(card, direction, blk_size);
1014
1015        return blk_size;
1016}
1017
1018static struct mmc_host_ops tmio_mmc_ops = {
1019        .request        = tmio_mmc_request,
1020        .set_ios        = tmio_mmc_set_ios,
1021        .get_ro         = tmio_mmc_get_ro,
1022        .get_cd         = tmio_mmc_get_cd,
1023        .enable_sdio_irq = tmio_mmc_enable_sdio_irq,
1024        .multi_io_quirk = tmio_multi_io_quirk,
1025};
1026
1027static int tmio_mmc_init_ocr(struct tmio_mmc_host *host)
1028{
1029        struct tmio_mmc_data *pdata = host->pdata;
1030        struct mmc_host *mmc = host->mmc;
1031        int err;
1032
1033        err = mmc_regulator_get_supply(mmc);
1034        if (err)
1035                return err;
1036
1037        /* use ocr_mask if no regulator */
1038        if (!mmc->ocr_avail)
1039                mmc->ocr_avail = pdata->ocr_mask;
1040
1041        /*
1042         * try again.
1043         * There is possibility that regulator has not been probed
1044         */
1045        if (!mmc->ocr_avail)
1046                return -EPROBE_DEFER;
1047
1048        return 0;
1049}
1050
1051static void tmio_mmc_of_parse(struct platform_device *pdev,
1052                              struct mmc_host *mmc)
1053{
1054        const struct device_node *np = pdev->dev.of_node;
1055
1056        if (!np)
1057                return;
1058
1059        /*
1060         * DEPRECATED:
1061         * For new platforms, please use "disable-wp" instead of
1062         * "toshiba,mmc-wrprotect-disable"
1063         */
1064        if (of_get_property(np, "toshiba,mmc-wrprotect-disable", NULL))
1065                mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
1066}
1067
1068struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev,
1069                                          struct tmio_mmc_data *pdata)
1070{
1071        struct tmio_mmc_host *host;
1072        struct mmc_host *mmc;
1073        void __iomem *ctl;
1074        int ret;
1075
1076        ctl = devm_platform_ioremap_resource(pdev, 0);
1077        if (IS_ERR(ctl))
1078                return ERR_CAST(ctl);
1079
1080        mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
1081        if (!mmc)
1082                return ERR_PTR(-ENOMEM);
1083
1084        host = mmc_priv(mmc);
1085        host->ctl = ctl;
1086        host->mmc = mmc;
1087        host->pdev = pdev;
1088        host->pdata = pdata;
1089        host->ops = tmio_mmc_ops;
1090        mmc->ops = &host->ops;
1091
1092        ret = mmc_of_parse(host->mmc);
1093        if (ret) {
1094                host = ERR_PTR(ret);
1095                goto free;
1096        }
1097
1098        tmio_mmc_of_parse(pdev, mmc);
1099
1100        platform_set_drvdata(pdev, host);
1101
1102        return host;
1103free:
1104        mmc_free_host(mmc);
1105
1106        return host;
1107}
1108EXPORT_SYMBOL_GPL(tmio_mmc_host_alloc);
1109
1110void tmio_mmc_host_free(struct tmio_mmc_host *host)
1111{
1112        mmc_free_host(host->mmc);
1113}
1114EXPORT_SYMBOL_GPL(tmio_mmc_host_free);
1115
1116int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
1117{
1118        struct platform_device *pdev = _host->pdev;
1119        struct tmio_mmc_data *pdata = _host->pdata;
1120        struct mmc_host *mmc = _host->mmc;
1121        int ret;
1122
1123        /*
1124         * Check the sanity of mmc->f_min to prevent host->set_clock() from
1125         * looping forever...
1126         */
1127        if (mmc->f_min == 0)
1128                return -EINVAL;
1129
1130        if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT))
1131                _host->write16_hook = NULL;
1132
1133        if (pdata->flags & TMIO_MMC_USE_BUSY_TIMEOUT && !_host->get_timeout_cycles)
1134                _host->get_timeout_cycles = tmio_mmc_get_timeout_cycles;
1135
1136        _host->set_pwr = pdata->set_pwr;
1137
1138        ret = tmio_mmc_init_ocr(_host);
1139        if (ret < 0)
1140                return ret;
1141
1142        /*
1143         * Look for a card detect GPIO, if it fails with anything
1144         * else than a probe deferral, just live without it.
1145         */
1146        ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0);
1147        if (ret == -EPROBE_DEFER)
1148                return ret;
1149
1150        mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;
1151        mmc->caps2 |= pdata->capabilities2;
1152        mmc->max_segs = pdata->max_segs ? : 32;
1153        mmc->max_blk_size = TMIO_MAX_BLK_SIZE;
1154        mmc->max_blk_count = pdata->max_blk_count ? :
1155                (PAGE_SIZE / mmc->max_blk_size) * mmc->max_segs;
1156        mmc->max_req_size = min_t(size_t,
1157                                  mmc->max_blk_size * mmc->max_blk_count,
1158                                  dma_max_mapping_size(&pdev->dev));
1159        mmc->max_seg_size = mmc->max_req_size;
1160
1161        if (mmc_can_gpio_ro(mmc))
1162                _host->ops.get_ro = mmc_gpio_get_ro;
1163
1164        if (mmc_can_gpio_cd(mmc))
1165                _host->ops.get_cd = mmc_gpio_get_cd;
1166
1167        _host->native_hotplug = !(mmc_can_gpio_cd(mmc) ||
1168                                  mmc->caps & MMC_CAP_NEEDS_POLL ||
1169                                  !mmc_card_is_removable(mmc));
1170
1171        /*
1172         * While using internal tmio hardware logic for card detection, we need
1173         * to ensure it stays powered for it to work.
1174         */
1175        if (_host->native_hotplug)
1176                pm_runtime_get_noresume(&pdev->dev);
1177
1178        _host->sdio_irq_enabled = false;
1179        if (pdata->flags & TMIO_MMC_SDIO_IRQ)
1180                _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
1181
1182        if (!_host->sdcard_irq_mask_all)
1183                _host->sdcard_irq_mask_all = TMIO_MASK_ALL;
1184
1185        _host->set_clock(_host, 0);
1186        tmio_mmc_reset(_host);
1187
1188        if (_host->native_hotplug)
1189                tmio_mmc_enable_mmc_irqs(_host,
1190                                TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
1191
1192        spin_lock_init(&_host->lock);
1193        mutex_init(&_host->ios_lock);
1194
1195        /* Init delayed work for request timeouts */
1196        INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work);
1197        INIT_WORK(&_host->done, tmio_mmc_done_work);
1198
1199        /* See if we also get DMA */
1200        tmio_mmc_request_dma(_host, pdata);
1201
1202        pm_runtime_get_noresume(&pdev->dev);
1203        pm_runtime_set_active(&pdev->dev);
1204        pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
1205        pm_runtime_use_autosuspend(&pdev->dev);
1206        pm_runtime_enable(&pdev->dev);
1207
1208        ret = mmc_add_host(mmc);
1209        if (ret)
1210                goto remove_host;
1211
1212        dev_pm_qos_expose_latency_limit(&pdev->dev, 100);
1213        pm_runtime_put(&pdev->dev);
1214
1215        return 0;
1216
1217remove_host:
1218        pm_runtime_put_noidle(&pdev->dev);
1219        tmio_mmc_host_remove(_host);
1220        return ret;
1221}
1222EXPORT_SYMBOL_GPL(tmio_mmc_host_probe);
1223
1224void tmio_mmc_host_remove(struct tmio_mmc_host *host)
1225{
1226        struct platform_device *pdev = host->pdev;
1227        struct mmc_host *mmc = host->mmc;
1228
1229        pm_runtime_get_sync(&pdev->dev);
1230
1231        if (host->pdata->flags & TMIO_MMC_SDIO_IRQ)
1232                sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
1233
1234        dev_pm_qos_hide_latency_limit(&pdev->dev);
1235
1236        mmc_remove_host(mmc);
1237        cancel_work_sync(&host->done);
1238        cancel_delayed_work_sync(&host->delayed_reset_work);
1239        tmio_mmc_release_dma(host);
1240        tmio_mmc_disable_mmc_irqs(host, host->sdcard_irq_mask_all);
1241
1242        if (host->native_hotplug)
1243                pm_runtime_put_noidle(&pdev->dev);
1244
1245        pm_runtime_disable(&pdev->dev);
1246        pm_runtime_dont_use_autosuspend(&pdev->dev);
1247        pm_runtime_put_noidle(&pdev->dev);
1248}
1249EXPORT_SYMBOL_GPL(tmio_mmc_host_remove);
1250
1251#ifdef CONFIG_PM
1252static int tmio_mmc_clk_enable(struct tmio_mmc_host *host)
1253{
1254        if (!host->clk_enable)
1255                return -ENOTSUPP;
1256
1257        return host->clk_enable(host);
1258}
1259
1260static void tmio_mmc_clk_disable(struct tmio_mmc_host *host)
1261{
1262        if (host->clk_disable)
1263                host->clk_disable(host);
1264}
1265
1266int tmio_mmc_host_runtime_suspend(struct device *dev)
1267{
1268        struct tmio_mmc_host *host = dev_get_drvdata(dev);
1269
1270        tmio_mmc_disable_mmc_irqs(host, host->sdcard_irq_mask_all);
1271
1272        if (host->clk_cache)
1273                host->set_clock(host, 0);
1274
1275        tmio_mmc_clk_disable(host);
1276
1277        return 0;
1278}
1279EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_suspend);
1280
1281int tmio_mmc_host_runtime_resume(struct device *dev)
1282{
1283        struct tmio_mmc_host *host = dev_get_drvdata(dev);
1284
1285        tmio_mmc_clk_enable(host);
1286        tmio_mmc_reset(host);
1287
1288        if (host->clk_cache)
1289                host->set_clock(host, host->clk_cache);
1290
1291        if (host->native_hotplug)
1292                tmio_mmc_enable_mmc_irqs(host,
1293                                TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
1294
1295        tmio_mmc_enable_dma(host, true);
1296
1297        return 0;
1298}
1299EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_resume);
1300#endif
1301
1302MODULE_LICENSE("GPL v2");
1303
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