drivers/mmc/host/toshsd.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Toshiba PCI Secure Digital Host Controller Interface driver
   4  *
   5  *  Copyright (C) 2014 Ondrej Zary
   6  *  Copyright (C) 2007 Richard Betts, All Rights Reserved.
   7  *
   8  *      Based on asic3_mmc.c, copyright (c) 2005 SDG Systems, LLC and,
   9  *      sdhci.c, copyright (C) 2005-2006 Pierre Ossman
  10  */
  11
  12 #include <linux/delay.h>
  13 #include <linux/device.h>
  14 #include <linux/module.h>
  15 #include <linux/pci.h>
  16 #include <linux/scatterlist.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/io.h>
  19 #include <linux/pm.h>
  20 #include <linux/pm_runtime.h>
  21 #include <linux/mmc/host.h>
  22 #include <linux/mmc/mmc.h>
  23
  24 #include "toshsd.h"
  25
  26 #define DRIVER_NAME "toshsd"
  27
  28 static const struct pci_device_id pci_ids[] = {
  29         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA, 0x0805) },
  30         { /* end: all zeroes */ },
  31 };
  32
  33 MODULE_DEVICE_TABLE(pci, pci_ids);
  34
  35 static void toshsd_init(struct toshsd_host *host)
  36 {
  37         /* enable clock */
  38         pci_write_config_byte(host->pdev, SD_PCICFG_CLKSTOP,
  39                                         SD_PCICFG_CLKSTOP_ENABLE_ALL);
  40         pci_write_config_byte(host->pdev, SD_PCICFG_CARDDETECT, 2);
  41
  42         /* reset */
  43         iowrite16(0, host->ioaddr + SD_SOFTWARERESET); /* assert */
  44         mdelay(2);
  45         iowrite16(1, host->ioaddr + SD_SOFTWARERESET); /* deassert */
  46         mdelay(2);
  47
  48         /* Clear card registers */
  49         iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
  50         iowrite32(0, host->ioaddr + SD_CARDSTATUS);
  51         iowrite32(0, host->ioaddr + SD_ERRORSTATUS0);
  52         iowrite16(0, host->ioaddr + SD_STOPINTERNAL);
  53
  54         /* SDIO clock? */
  55         iowrite16(0x100, host->ioaddr + SDIO_BASE + SDIO_CLOCKNWAITCTRL);
  56
  57         /* enable LED */
  58         pci_write_config_byte(host->pdev, SD_PCICFG_SDLED_ENABLE1,
  59                                         SD_PCICFG_LED_ENABLE1_START);
  60         pci_write_config_byte(host->pdev, SD_PCICFG_SDLED_ENABLE2,
  61                                         SD_PCICFG_LED_ENABLE2_START);
  62
  63         /* set interrupt masks */
  64         iowrite32(~(u32)(SD_CARD_RESP_END | SD_CARD_RW_END
  65                         | SD_CARD_CARD_REMOVED_0 | SD_CARD_CARD_INSERTED_0
  66                         | SD_BUF_READ_ENABLE | SD_BUF_WRITE_ENABLE
  67                         | SD_BUF_CMD_TIMEOUT),
  68                         host->ioaddr + SD_INTMASKCARD);
  69
  70         iowrite16(0x1000, host->ioaddr + SD_TRANSACTIONCTRL);
  71 }
  72
  73 /* Set MMC clock / power.
  74  * Note: This controller uses a simple divider scheme therefore it cannot run
  75  * SD/MMC cards at full speed (24/20MHz). HCLK (=33MHz PCI clock?) is too high
  76  * and the next slowest is 16MHz (div=2).
  77  */
  78 static void __toshsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
  79 {
  80         struct toshsd_host *host = mmc_priv(mmc);
  81
  82         if (ios->clock) {
  83                 u16 clk;
  84                 int div = 1;
  85
  86                 while (ios->clock < HCLK / div)
  87                         div *= 2;
  88
  89                 clk = div >> 2;
  90
  91                 if (div == 1) { /* disable the divider */
  92                         pci_write_config_byte(host->pdev, SD_PCICFG_CLKMODE,
  93                                               SD_PCICFG_CLKMODE_DIV_DISABLE);
  94                         clk |= SD_CARDCLK_DIV_DISABLE;
  95                 } else
  96                         pci_write_config_byte(host->pdev, SD_PCICFG_CLKMODE, 0);
  97
  98                 clk |= SD_CARDCLK_ENABLE_CLOCK;
  99                 iowrite16(clk, host->ioaddr + SD_CARDCLOCKCTRL);
 100
 101                 mdelay(10);
 102         } else
 103                 iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
 104
 105         switch (ios->power_mode) {
 106         case MMC_POWER_OFF:
 107                 pci_write_config_byte(host->pdev, SD_PCICFG_POWER1,
 108                                         SD_PCICFG_PWR1_OFF);
 109                 mdelay(1);
 110                 break;
 111         case MMC_POWER_UP:
 112                 break;
 113         case MMC_POWER_ON:
 114                 pci_write_config_byte(host->pdev, SD_PCICFG_POWER1,
 115                                         SD_PCICFG_PWR1_33V);
 116                 pci_write_config_byte(host->pdev, SD_PCICFG_POWER2,
 117                                         SD_PCICFG_PWR2_AUTO);
 118                 mdelay(20);
 119                 break;
 120         }
 121
 122         switch (ios->bus_width) {
 123         case MMC_BUS_WIDTH_1:
 124                 iowrite16(SD_CARDOPT_REQUIRED | SD_CARDOPT_DATA_RESP_TIMEOUT(14)
 125                                 | SD_CARDOPT_C2_MODULE_ABSENT
 126                                 | SD_CARDOPT_DATA_XFR_WIDTH_1,
 127                                 host->ioaddr + SD_CARDOPTIONSETUP);
 128                 break;
 129         case MMC_BUS_WIDTH_4:
 130                 iowrite16(SD_CARDOPT_REQUIRED | SD_CARDOPT_DATA_RESP_TIMEOUT(14)
 131                                 | SD_CARDOPT_C2_MODULE_ABSENT
 132                                 | SD_CARDOPT_DATA_XFR_WIDTH_4,
 133                                 host->ioaddr + SD_CARDOPTIONSETUP);
 134                 break;
 135         }
 136 }
 137
 138 static void toshsd_set_led(struct toshsd_host *host, unsigned char state)
 139 {
 140         iowrite16(state, host->ioaddr + SDIO_BASE + SDIO_LEDCTRL);
 141 }
 142
 143 static void toshsd_finish_request(struct toshsd_host *host)
 144 {
 145         struct mmc_request *mrq = host->mrq;
 146
 147         /* Write something to end the command */
 148         host->mrq = NULL;
 149         host->cmd = NULL;
 150         host->data = NULL;
 151
 152         toshsd_set_led(host, 0);
 153         mmc_request_done(host->mmc, mrq);
 154 }
 155
 156 static irqreturn_t toshsd_thread_irq(int irq, void *dev_id)
 157 {
 158         struct toshsd_host *host = dev_id;
 159         struct mmc_data *data = host->data;
 160         struct sg_mapping_iter *sg_miter = &host->sg_miter;
 161         unsigned short *buf;
 162         int count;
 163         unsigned long flags;
 164
 165         if (!data) {
 166                 dev_warn(&host->pdev->dev, "Spurious Data IRQ\n");
 167                 if (host->cmd) {
 168                         host->cmd->error = -EIO;
 169                         toshsd_finish_request(host);
 170                 }
 171                 return IRQ_NONE;
 172         }
 173         spin_lock_irqsave(&host->lock, flags);
 174
 175         if (!sg_miter_next(sg_miter))
 176                 goto done;
 177
 178         buf = sg_miter->addr;
 179
 180         /* Ensure we dont read more than one block. The chip will interrupt us
 181          * When the next block is available.
 182          */
 183         count = sg_miter->length;
 184         if (count > data->blksz)
 185                 count = data->blksz;
 186
 187         dev_dbg(&host->pdev->dev, "count: %08x, flags %08x\n", count,
 188                 data->flags);
 189
 190         /* Transfer the data */
 191         if (data->flags & MMC_DATA_READ)
 192                 ioread32_rep(host->ioaddr + SD_DATAPORT, buf, count >> 2);
 193         else
 194                 iowrite32_rep(host->ioaddr + SD_DATAPORT, buf, count >> 2);
 195
 196         sg_miter->consumed = count;
 197         sg_miter_stop(sg_miter);
 198
 199 done:
 200         spin_unlock_irqrestore(&host->lock, flags);
 201
 202         return IRQ_HANDLED;
 203 }
 204
 205 static void toshsd_cmd_irq(struct toshsd_host *host)
 206 {
 207         struct mmc_command *cmd = host->cmd;
 208         u8 *buf;
 209         u16 data;
 210
 211         if (!host->cmd) {
 212                 dev_warn(&host->pdev->dev, "Spurious CMD irq\n");
 213                 return;
 214         }
 215         buf = (u8 *)cmd->resp;
 216         host->cmd = NULL;
 217
 218         if (cmd->flags & MMC_RSP_PRESENT && cmd->flags & MMC_RSP_136) {
 219                 /* R2 */
 220                 buf[12] = 0xff;
 221                 data = ioread16(host->ioaddr + SD_RESPONSE0);
 222                 buf[13] = data & 0xff;
 223                 buf[14] = data >> 8;
 224                 data = ioread16(host->ioaddr + SD_RESPONSE1);
 225                 buf[15] = data & 0xff;
 226                 buf[8] = data >> 8;
 227                 data = ioread16(host->ioaddr + SD_RESPONSE2);
 228                 buf[9] = data & 0xff;
 229                 buf[10] = data >> 8;
 230                 data = ioread16(host->ioaddr + SD_RESPONSE3);
 231                 buf[11] = data & 0xff;
 232                 buf[4] = data >> 8;
 233                 data = ioread16(host->ioaddr + SD_RESPONSE4);
 234                 buf[5] = data & 0xff;
 235                 buf[6] = data >> 8;
 236                 data = ioread16(host->ioaddr + SD_RESPONSE5);
 237                 buf[7] = data & 0xff;
 238                 buf[0] = data >> 8;
 239                 data = ioread16(host->ioaddr + SD_RESPONSE6);
 240                 buf[1] = data & 0xff;
 241                 buf[2] = data >> 8;
 242                 data = ioread16(host->ioaddr + SD_RESPONSE7);
 243                 buf[3] = data & 0xff;
 244         } else if (cmd->flags & MMC_RSP_PRESENT) {
 245                 /* R1, R1B, R3, R6, R7 */
 246                 data = ioread16(host->ioaddr + SD_RESPONSE0);
 247                 buf[0] = data & 0xff;
 248                 buf[1] = data >> 8;
 249                 data = ioread16(host->ioaddr + SD_RESPONSE1);
 250                 buf[2] = data & 0xff;
 251                 buf[3] = data >> 8;
 252         }
 253
 254         dev_dbg(&host->pdev->dev, "Command IRQ complete %d %d %x\n",
 255                 cmd->opcode, cmd->error, cmd->flags);
 256
 257         /* If there is data to handle we will
 258          * finish the request in the mmc_data_end_irq handler.*/
 259         if (host->data)
 260                 return;
 261
 262         toshsd_finish_request(host);
 263 }
 264
 265 static void toshsd_data_end_irq(struct toshsd_host *host)
 266 {
 267         struct mmc_data *data = host->data;
 268
 269         host->data = NULL;
 270
 271         if (!data) {
 272                 dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
 273                 return;
 274         }
 275
 276         if (data->error == 0)
 277                 data->bytes_xfered = data->blocks * data->blksz;
 278         else
 279                 data->bytes_xfered = 0;
 280
 281         dev_dbg(&host->pdev->dev, "Completed data request xfr=%d\n",
 282                 data->bytes_xfered);
 283
 284         iowrite16(0, host->ioaddr + SD_STOPINTERNAL);
 285
 286         toshsd_finish_request(host);
 287 }
 288
 289 static irqreturn_t toshsd_irq(int irq, void *dev_id)
 290 {
 291         struct toshsd_host *host = dev_id;
 292         u32 int_reg, int_mask, int_status, detail;
 293         int error = 0, ret = IRQ_HANDLED;
 294
 295         spin_lock(&host->lock);
 296         int_status = ioread32(host->ioaddr + SD_CARDSTATUS);
 297         int_mask = ioread32(host->ioaddr + SD_INTMASKCARD);
 298         int_reg = int_status & ~int_mask & ~IRQ_DONT_CARE_BITS;
 299
 300         dev_dbg(&host->pdev->dev, "IRQ status:%x mask:%x\n",
 301                 int_status, int_mask);
 302
 303         /* nothing to do: it's not our IRQ */
 304         if (!int_reg) {
 305                 ret = IRQ_NONE;
 306                 goto irq_end;
 307         }
 308
 309         if (int_reg & SD_BUF_CMD_TIMEOUT) {
 310                 error = -ETIMEDOUT;
 311                 dev_dbg(&host->pdev->dev, "Timeout\n");
 312         } else if (int_reg & SD_BUF_CRC_ERR) {
 313                 error = -EILSEQ;
 314                 dev_err(&host->pdev->dev, "BadCRC\n");
 315         } else if (int_reg & (SD_BUF_ILLEGAL_ACCESS
 316                                 | SD_BUF_CMD_INDEX_ERR
 317                                 | SD_BUF_STOP_BIT_END_ERR
 318                                 | SD_BUF_OVERFLOW
 319                                 | SD_BUF_UNDERFLOW
 320                                 | SD_BUF_DATA_TIMEOUT)) {
 321                 dev_err(&host->pdev->dev, "Buffer status error: { %s%s%s%s%s%s}\n",
 322                         int_reg & SD_BUF_ILLEGAL_ACCESS ? "ILLEGAL_ACC " : "",
 323                         int_reg & SD_BUF_CMD_INDEX_ERR ? "CMD_INDEX " : "",
 324                         int_reg & SD_BUF_STOP_BIT_END_ERR ? "STOPBIT_END " : "",
 325                         int_reg & SD_BUF_OVERFLOW ? "OVERFLOW " : "",
 326                         int_reg & SD_BUF_UNDERFLOW ? "UNDERFLOW " : "",
 327                         int_reg & SD_BUF_DATA_TIMEOUT ? "DATA_TIMEOUT " : "");
 328
 329                 detail = ioread32(host->ioaddr + SD_ERRORSTATUS0);
 330                 dev_err(&host->pdev->dev, "detail error status { %s%s%s%s%s%s%s%s%s%s%s%s%s}\n",
 331                         detail & SD_ERR0_RESP_CMD_ERR ? "RESP_CMD " : "",
 332                         detail & SD_ERR0_RESP_NON_CMD12_END_BIT_ERR ? "RESP_END_BIT " : "",
 333                         detail & SD_ERR0_RESP_CMD12_END_BIT_ERR ? "RESP_END_BIT " : "",
 334                         detail & SD_ERR0_READ_DATA_END_BIT_ERR ? "READ_DATA_END_BIT " : "",
 335                         detail & SD_ERR0_WRITE_CRC_STATUS_END_BIT_ERR ? "WRITE_CMD_END_BIT " : "",
 336                         detail & SD_ERR0_RESP_NON_CMD12_CRC_ERR ? "RESP_CRC " : "",
 337                         detail & SD_ERR0_RESP_CMD12_CRC_ERR ? "RESP_CRC " : "",
 338                         detail & SD_ERR0_READ_DATA_CRC_ERR ? "READ_DATA_CRC " : "",
 339                         detail & SD_ERR0_WRITE_CMD_CRC_ERR ? "WRITE_CMD_CRC " : "",
 340                         detail & SD_ERR1_NO_CMD_RESP ? "NO_CMD_RESP " : "",
 341                         detail & SD_ERR1_TIMEOUT_READ_DATA ? "READ_DATA_TIMEOUT " : "",
 342                         detail & SD_ERR1_TIMEOUT_CRS_STATUS ? "CRS_STATUS_TIMEOUT " : "",
 343                         detail & SD_ERR1_TIMEOUT_CRC_BUSY ? "CRC_BUSY_TIMEOUT " : "");
 344                 error = -EIO;
 345         }
 346
 347         if (error) {
 348                 if (host->cmd)
 349                         host->cmd->error = error;
 350
 351                 if (error == -ETIMEDOUT) {
 352                         iowrite32(int_status &
 353                                   ~(SD_BUF_CMD_TIMEOUT | SD_CARD_RESP_END),
 354                                   host->ioaddr + SD_CARDSTATUS);
 355                 } else {
 356                         toshsd_init(host);
 357                         __toshsd_set_ios(host->mmc, &host->mmc->ios);
 358                         goto irq_end;
 359                 }
 360         }
 361
 362         /* Card insert/remove. The mmc controlling code is stateless. */
 363         if (int_reg & (SD_CARD_CARD_INSERTED_0 | SD_CARD_CARD_REMOVED_0)) {
 364                 iowrite32(int_status &
 365                           ~(SD_CARD_CARD_REMOVED_0 | SD_CARD_CARD_INSERTED_0),
 366                           host->ioaddr + SD_CARDSTATUS);
 367
 368                 if (int_reg & SD_CARD_CARD_INSERTED_0)
 369                         toshsd_init(host);
 370
 371                 mmc_detect_change(host->mmc, 1);
 372         }
 373
 374         /* Data transfer */
 375         if (int_reg & (SD_BUF_READ_ENABLE | SD_BUF_WRITE_ENABLE)) {
 376                 iowrite32(int_status &
 377                           ~(SD_BUF_WRITE_ENABLE | SD_BUF_READ_ENABLE),
 378                           host->ioaddr + SD_CARDSTATUS);
 379
 380                 ret = IRQ_WAKE_THREAD;
 381                 goto irq_end;
 382         }
 383
 384         /* Command completion */
 385         if (int_reg & SD_CARD_RESP_END) {
 386                 iowrite32(int_status & ~(SD_CARD_RESP_END),
 387                           host->ioaddr + SD_CARDSTATUS);
 388                 toshsd_cmd_irq(host);
 389         }
 390
 391         /* Data transfer completion */
 392         if (int_reg & SD_CARD_RW_END) {
 393                 iowrite32(int_status & ~(SD_CARD_RW_END),
 394                           host->ioaddr + SD_CARDSTATUS);
 395                 toshsd_data_end_irq(host);
 396         }
 397 irq_end:
 398         spin_unlock(&host->lock);
 399         return ret;
 400 }
 401
 402 static void toshsd_start_cmd(struct toshsd_host *host, struct mmc_command *cmd)
 403 {
 404         struct mmc_data *data = host->data;
 405         int c = cmd->opcode;
 406
 407         dev_dbg(&host->pdev->dev, "Command opcode: %d\n", cmd->opcode);
 408
 409         if (cmd->opcode == MMC_STOP_TRANSMISSION) {
 410                 iowrite16(SD_STOPINT_ISSUE_CMD12,
 411                           host->ioaddr + SD_STOPINTERNAL);
 412
 413                 cmd->resp[0] = cmd->opcode;
 414                 cmd->resp[1] = 0;
 415                 cmd->resp[2] = 0;
 416                 cmd->resp[3] = 0;
 417
 418                 toshsd_finish_request(host);
 419                 return;
 420         }
 421
 422         switch (mmc_resp_type(cmd)) {
 423         case MMC_RSP_NONE:
 424                 c |= SD_CMD_RESP_TYPE_NONE;
 425                 break;
 426
 427         case MMC_RSP_R1:
 428                 c |= SD_CMD_RESP_TYPE_EXT_R1;
 429                 break;
 430         case MMC_RSP_R1B:
 431                 c |= SD_CMD_RESP_TYPE_EXT_R1B;
 432                 break;
 433         case MMC_RSP_R2:
 434                 c |= SD_CMD_RESP_TYPE_EXT_R2;
 435                 break;
 436         case MMC_RSP_R3:
 437                 c |= SD_CMD_RESP_TYPE_EXT_R3;
 438                 break;
 439
 440         default:
 441                 dev_err(&host->pdev->dev, "Unknown response type %d\n",
 442                         mmc_resp_type(cmd));
 443                 break;
 444         }
 445
 446         host->cmd = cmd;
 447
 448         if (cmd->opcode == MMC_APP_CMD)
 449                 c |= SD_CMD_TYPE_ACMD;
 450
 451         if (cmd->opcode == MMC_GO_IDLE_STATE)
 452                 c |= (3 << 8);  /* removed from ipaq-asic3.h for some reason */
 453
 454         if (data) {
 455                 c |= SD_CMD_DATA_PRESENT;
 456
 457                 if (data->blocks > 1) {
 458                         iowrite16(SD_STOPINT_AUTO_ISSUE_CMD12,
 459                                   host->ioaddr + SD_STOPINTERNAL);
 460                         c |= SD_CMD_MULTI_BLOCK;
 461                 }
 462
 463                 if (data->flags & MMC_DATA_READ)
 464                         c |= SD_CMD_TRANSFER_READ;
 465
 466                 /* MMC_DATA_WRITE does not require a bit to be set */
 467         }
 468
 469         /* Send the command */
 470         iowrite32(cmd->arg, host->ioaddr + SD_ARG0);
 471         iowrite16(c, host->ioaddr + SD_CMD);
 472 }
 473
 474 static void toshsd_start_data(struct toshsd_host *host, struct mmc_data *data)
 475 {
 476         unsigned int flags = SG_MITER_ATOMIC;
 477
 478         dev_dbg(&host->pdev->dev, "setup data transfer: blocksize %08x  nr_blocks %d, offset: %08x\n",
 479                 data->blksz, data->blocks, data->sg->offset);
 480
 481         host->data = data;
 482
 483         if (data->flags & MMC_DATA_READ)
 484                 flags |= SG_MITER_TO_SG;
 485         else
 486                 flags |= SG_MITER_FROM_SG;
 487
 488         sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
 489
 490         /* Set transfer length and blocksize */
 491         iowrite16(data->blocks, host->ioaddr + SD_BLOCKCOUNT);
 492         iowrite16(data->blksz, host->ioaddr + SD_CARDXFERDATALEN);
 493 }
 494
 495 /* Process requests from the MMC layer */
 496 static void toshsd_request(struct mmc_host *mmc, struct mmc_request *mrq)
 497 {
 498         struct toshsd_host *host = mmc_priv(mmc);
 499         unsigned long flags;
 500
 501         /* abort if card not present */
 502         if (!(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_PRESENT_0)) {
 503                 mrq->cmd->error = -ENOMEDIUM;
 504                 mmc_request_done(mmc, mrq);
 505                 return;
 506         }
 507
 508         spin_lock_irqsave(&host->lock, flags);
 509
 510         WARN_ON(host->mrq != NULL);
 511
 512         host->mrq = mrq;
 513
 514         if (mrq->data)
 515                 toshsd_start_data(host, mrq->data);
 516
 517         toshsd_set_led(host, 1);
 518
 519         toshsd_start_cmd(host, mrq->cmd);
 520
 521         spin_unlock_irqrestore(&host->lock, flags);
 522 }
 523
 524 static void toshsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 525 {
 526         struct toshsd_host *host = mmc_priv(mmc);
 527         unsigned long flags;
 528
 529         spin_lock_irqsave(&host->lock, flags);
 530         __toshsd_set_ios(mmc, ios);
 531         spin_unlock_irqrestore(&host->lock, flags);
 532 }
 533
 534 static int toshsd_get_ro(struct mmc_host *mmc)
 535 {
 536         struct toshsd_host *host = mmc_priv(mmc);
 537
 538         /* active low */
 539         return !(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_WRITE_PROTECT);
 540 }
 541
 542 static int toshsd_get_cd(struct mmc_host *mmc)
 543 {
 544         struct toshsd_host *host = mmc_priv(mmc);
 545
 546         return !!(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_PRESENT_0);
 547 }
 548
 549 static const struct mmc_host_ops toshsd_ops = {
 550         .request = toshsd_request,
 551         .set_ios = toshsd_set_ios,
 552         .get_ro = toshsd_get_ro,
 553         .get_cd = toshsd_get_cd,
 554 };
 555
 556
 557 static void toshsd_powerdown(struct toshsd_host *host)
 558 {
 559         /* mask all interrupts */
 560         iowrite32(0xffffffff, host->ioaddr + SD_INTMASKCARD);
 561         /* disable card clock */
 562         iowrite16(0x000, host->ioaddr + SDIO_BASE + SDIO_CLOCKNWAITCTRL);
 563         iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
 564         /* power down card */
 565         pci_write_config_byte(host->pdev, SD_PCICFG_POWER1, SD_PCICFG_PWR1_OFF);
 566         /* disable clock */
 567         pci_write_config_byte(host->pdev, SD_PCICFG_CLKSTOP, 0);
 568 }
 569
 570 #ifdef CONFIG_PM_SLEEP
 571 static int toshsd_pm_suspend(struct device *dev)
 572 {
 573         struct pci_dev *pdev = to_pci_dev(dev);
 574         struct toshsd_host *host = pci_get_drvdata(pdev);
 575
 576         toshsd_powerdown(host);
 577
 578         pci_save_state(pdev);
 579         pci_enable_wake(pdev, PCI_D3hot, 0);
 580         pci_disable_device(pdev);
 581         pci_set_power_state(pdev, PCI_D3hot);
 582
 583         return 0;
 584 }
 585
 586 static int toshsd_pm_resume(struct device *dev)
 587 {
 588         struct pci_dev *pdev = to_pci_dev(dev);
 589         struct toshsd_host *host = pci_get_drvdata(pdev);
 590         int ret;
 591
 592         pci_set_power_state(pdev, PCI_D0);
 593         pci_restore_state(pdev);
 594         ret = pci_enable_device(pdev);
 595         if (ret)
 596                 return ret;
 597
 598         toshsd_init(host);
 599
 600         return 0;
 601 }
 602 #endif /* CONFIG_PM_SLEEP */
 603
 604 static int toshsd_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 605 {
 606         int ret;
 607         struct toshsd_host *host;
 608         struct mmc_host *mmc;
 609         resource_size_t base;
 610
 611         ret = pci_enable_device(pdev);
 612         if (ret)
 613                 return ret;
 614
 615         mmc = mmc_alloc_host(sizeof(struct toshsd_host), &pdev->dev);
 616         if (!mmc) {
 617                 ret = -ENOMEM;
 618                 goto err;
 619         }
 620
 621         host = mmc_priv(mmc);
 622         host->mmc = mmc;
 623
 624         host->pdev = pdev;
 625         pci_set_drvdata(pdev, host);
 626
 627         ret = pci_request_regions(pdev, DRIVER_NAME);
 628         if (ret)
 629                 goto free;
 630
 631         host->ioaddr = pci_iomap(pdev, 0, 0);
 632         if (!host->ioaddr) {
 633                 ret = -ENOMEM;
 634                 goto release;
 635         }
 636
 637         /* Set MMC host parameters */
 638         mmc->ops = &toshsd_ops;
 639         mmc->caps = MMC_CAP_4_BIT_DATA;
 640         mmc->ocr_avail = MMC_VDD_32_33;
 641
 642         mmc->f_min = HCLK / 512;
 643         mmc->f_max = HCLK;
 644
 645         spin_lock_init(&host->lock);
 646
 647         toshsd_init(host);
 648
 649         ret = request_threaded_irq(pdev->irq, toshsd_irq, toshsd_thread_irq,
 650                                    IRQF_SHARED, DRIVER_NAME, host);
 651         if (ret)
 652                 goto unmap;
 653
 654         mmc_add_host(mmc);
 655
 656         base = pci_resource_start(pdev, 0);
 657         dev_dbg(&pdev->dev, "MMIO %pa, IRQ %d\n", &base, pdev->irq);
 658
 659         pm_suspend_ignore_children(&pdev->dev, 1);
 660
 661         return 0;
 662
 663 unmap:
 664         pci_iounmap(pdev, host->ioaddr);
 665 release:
 666         pci_release_regions(pdev);
 667 free:
 668         mmc_free_host(mmc);
 669         pci_set_drvdata(pdev, NULL);
 670 err:
 671         pci_disable_device(pdev);
 672         return ret;
 673 }
 674
 675 static void toshsd_remove(struct pci_dev *pdev)
 676 {
 677         struct toshsd_host *host = pci_get_drvdata(pdev);
 678
 679         mmc_remove_host(host->mmc);
 680         toshsd_powerdown(host);
 681         free_irq(pdev->irq, host);
 682         pci_iounmap(pdev, host->ioaddr);
 683         pci_release_regions(pdev);
 684         mmc_free_host(host->mmc);
 685         pci_set_drvdata(pdev, NULL);
 686         pci_disable_device(pdev);
 687 }
 688
 689 static const struct dev_pm_ops toshsd_pm_ops = {
 690         SET_SYSTEM_SLEEP_PM_OPS(toshsd_pm_suspend, toshsd_pm_resume)
 691 };
 692
 693 static struct pci_driver toshsd_driver = {
 694         .name = DRIVER_NAME,
 695         .id_table = pci_ids,
 696         .probe = toshsd_probe,
 697         .remove = toshsd_remove,
 698         .driver.pm = &toshsd_pm_ops,
 699 };
 700
 701 module_pci_driver(toshsd_driver);
 702
 703 MODULE_AUTHOR("Ondrej Zary, Richard Betts");
 704 MODULE_DESCRIPTION("Toshiba PCI Secure Digital Host Controller Interface driver");
 705 MODULE_LICENSE("GPL");