drivers/mmc/host/toshsd.c

   1 /*
   2  *  Toshiba PCI Secure Digital Host Controller Interface driver
   3  *
   4  *  Copyright (C) 2014 Ondrej Zary
   5  *  Copyright (C) 2007 Richard Betts, All Rights Reserved.
   6  *
   7  *      Based on asic3_mmc.c, copyright (c) 2005 SDG Systems, LLC and,
   8  *      sdhci.c, copyright (C) 2005-2006 Pierre Ossman
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or (at
  13  * your option) any later version.
  14  */
  15
  16 #include <linux/delay.h>
  17 #include <linux/device.h>
  18 #include <linux/module.h>
  19 #include <linux/pci.h>
  20 #include <linux/scatterlist.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/io.h>
  23 #include <linux/pm.h>
  24 #include <linux/mmc/host.h>
  25 #include <linux/mmc/mmc.h>
  26
  27 #include "toshsd.h"
  28
  29 #define DRIVER_NAME "toshsd"
  30
  31 static const struct pci_device_id pci_ids[] = {
  32         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA, 0x0805) },
  33         { /* end: all zeroes */ },
  34 };
  35
  36 MODULE_DEVICE_TABLE(pci, pci_ids);
  37
  38 static void toshsd_init(struct toshsd_host *host)
  39 {
  40         /* enable clock */
  41         pci_write_config_byte(host->pdev, SD_PCICFG_CLKSTOP,
  42                                         SD_PCICFG_CLKSTOP_ENABLE_ALL);
  43         pci_write_config_byte(host->pdev, SD_PCICFG_CARDDETECT, 2);
  44
  45         /* reset */
  46         iowrite16(0, host->ioaddr + SD_SOFTWARERESET); /* assert */
  47         mdelay(2);
  48         iowrite16(1, host->ioaddr + SD_SOFTWARERESET); /* deassert */
  49         mdelay(2);
  50
  51         /* Clear card registers */
  52         iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
  53         iowrite32(0, host->ioaddr + SD_CARDSTATUS);
  54         iowrite32(0, host->ioaddr + SD_ERRORSTATUS0);
  55         iowrite16(0, host->ioaddr + SD_STOPINTERNAL);
  56
  57         /* SDIO clock? */
  58         iowrite16(0x100, host->ioaddr + SDIO_BASE + SDIO_CLOCKNWAITCTRL);
  59
  60         /* enable LED */
  61         pci_write_config_byte(host->pdev, SD_PCICFG_SDLED_ENABLE1,
  62                                         SD_PCICFG_LED_ENABLE1_START);
  63         pci_write_config_byte(host->pdev, SD_PCICFG_SDLED_ENABLE2,
  64                                         SD_PCICFG_LED_ENABLE2_START);
  65
  66         /* set interrupt masks */
  67         iowrite32(~(u32)(SD_CARD_RESP_END | SD_CARD_RW_END
  68                         | SD_CARD_CARD_REMOVED_0 | SD_CARD_CARD_INSERTED_0
  69                         | SD_BUF_READ_ENABLE | SD_BUF_WRITE_ENABLE
  70                         | SD_BUF_CMD_TIMEOUT),
  71                         host->ioaddr + SD_INTMASKCARD);
  72
  73         iowrite16(0x1000, host->ioaddr + SD_TRANSACTIONCTRL);
  74 }
  75
  76 /* Set MMC clock / power.
  77  * Note: This controller uses a simple divider scheme therefore it cannot run
  78  * SD/MMC cards at full speed (24/20MHz). HCLK (=33MHz PCI clock?) is too high
  79  * and the next slowest is 16MHz (div=2).
  80  */
  81 static void __toshsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
  82 {
  83         struct toshsd_host *host = mmc_priv(mmc);
  84
  85         if (ios->clock) {
  86                 u16 clk;
  87                 int div = 1;
  88
  89                 while (ios->clock < HCLK / div)
  90                         div *= 2;
  91
  92                 clk = div >> 2;
  93
  94                 if (div == 1) { /* disable the divider */
  95                         pci_write_config_byte(host->pdev, SD_PCICFG_CLKMODE,
  96                                               SD_PCICFG_CLKMODE_DIV_DISABLE);
  97                         clk |= SD_CARDCLK_DIV_DISABLE;
  98                 } else
  99                         pci_write_config_byte(host->pdev, SD_PCICFG_CLKMODE, 0);
 100
 101                 clk |= SD_CARDCLK_ENABLE_CLOCK;
 102                 iowrite16(clk, host->ioaddr + SD_CARDCLOCKCTRL);
 103
 104                 mdelay(10);
 105         } else
 106                 iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
 107
 108         switch (ios->power_mode) {
 109         case MMC_POWER_OFF:
 110                 pci_write_config_byte(host->pdev, SD_PCICFG_POWER1,
 111                                         SD_PCICFG_PWR1_OFF);
 112                 mdelay(1);
 113                 break;
 114         case MMC_POWER_UP:
 115                 break;
 116         case MMC_POWER_ON:
 117                 pci_write_config_byte(host->pdev, SD_PCICFG_POWER1,
 118                                         SD_PCICFG_PWR1_33V);
 119                 pci_write_config_byte(host->pdev, SD_PCICFG_POWER2,
 120                                         SD_PCICFG_PWR2_AUTO);
 121                 mdelay(20);
 122                 break;
 123         }
 124
 125         switch (ios->bus_width) {
 126         case MMC_BUS_WIDTH_1:
 127                 iowrite16(SD_CARDOPT_REQUIRED | SD_CARDOPT_DATA_RESP_TIMEOUT(14)
 128                                 | SD_CARDOPT_C2_MODULE_ABSENT
 129                                 | SD_CARDOPT_DATA_XFR_WIDTH_1,
 130                                 host->ioaddr + SD_CARDOPTIONSETUP);
 131                 break;
 132         case MMC_BUS_WIDTH_4:
 133                 iowrite16(SD_CARDOPT_REQUIRED | SD_CARDOPT_DATA_RESP_TIMEOUT(14)
 134                                 | SD_CARDOPT_C2_MODULE_ABSENT
 135                                 | SD_CARDOPT_DATA_XFR_WIDTH_4,
 136                                 host->ioaddr + SD_CARDOPTIONSETUP);
 137                 break;
 138         }
 139 }
 140
 141 static void toshsd_set_led(struct toshsd_host *host, unsigned char state)
 142 {
 143         iowrite16(state, host->ioaddr + SDIO_BASE + SDIO_LEDCTRL);
 144 }
 145
 146 static void toshsd_finish_request(struct toshsd_host *host)
 147 {
 148         struct mmc_request *mrq = host->mrq;
 149
 150         /* Write something to end the command */
 151         host->mrq = NULL;
 152         host->cmd = NULL;
 153         host->data = NULL;
 154
 155         toshsd_set_led(host, 0);
 156         mmc_request_done(host->mmc, mrq);
 157 }
 158
 159 static irqreturn_t toshsd_thread_irq(int irq, void *dev_id)
 160 {
 161         struct toshsd_host *host = dev_id;
 162         struct mmc_data *data = host->data;
 163         struct sg_mapping_iter *sg_miter = &host->sg_miter;
 164         unsigned short *buf;
 165         int count;
 166         unsigned long flags;
 167
 168         if (!data) {
 169                 dev_warn(&host->pdev->dev, "Spurious Data IRQ\n");
 170                 if (host->cmd) {
 171                         host->cmd->error = -EIO;
 172                         toshsd_finish_request(host);
 173                 }
 174                 return IRQ_NONE;
 175         }
 176         spin_lock_irqsave(&host->lock, flags);
 177
 178         if (!sg_miter_next(sg_miter))
 179                 return IRQ_HANDLED;
 180         buf = sg_miter->addr;
 181
 182         /* Ensure we dont read more than one block. The chip will interrupt us
 183          * When the next block is available.
 184          */
 185         count = sg_miter->length;
 186         if (count > data->blksz)
 187                 count = data->blksz;
 188
 189         dev_dbg(&host->pdev->dev, "count: %08x, flags %08x\n", count,
 190                 data->flags);
 191
 192         /* Transfer the data */
 193         if (data->flags & MMC_DATA_READ)
 194                 ioread32_rep(host->ioaddr + SD_DATAPORT, buf, count >> 2);
 195         else
 196                 iowrite32_rep(host->ioaddr + SD_DATAPORT, buf, count >> 2);
 197
 198         sg_miter->consumed = count;
 199         sg_miter_stop(sg_miter);
 200
 201         spin_unlock_irqrestore(&host->lock, flags);
 202
 203         return IRQ_HANDLED;
 204 }
 205
 206 static void toshsd_cmd_irq(struct toshsd_host *host)
 207 {
 208         struct mmc_command *cmd = host->cmd;
 209         u8 *buf;
 210         u16 data;
 211
 212         if (!host->cmd) {
 213                 dev_warn(&host->pdev->dev, "Spurious CMD irq\n");
 214                 return;
 215         }
 216         buf = (u8 *)cmd->resp;
 217         host->cmd = NULL;
 218
 219         if (cmd->flags & MMC_RSP_PRESENT && cmd->flags & MMC_RSP_136) {
 220                 /* R2 */
 221                 buf[12] = 0xff;
 222                 data = ioread16(host->ioaddr + SD_RESPONSE0);
 223                 buf[13] = data & 0xff;
 224                 buf[14] = data >> 8;
 225                 data = ioread16(host->ioaddr + SD_RESPONSE1);
 226                 buf[15] = data & 0xff;
 227                 buf[8] = data >> 8;
 228                 data = ioread16(host->ioaddr + SD_RESPONSE2);
 229                 buf[9] = data & 0xff;
 230                 buf[10] = data >> 8;
 231                 data = ioread16(host->ioaddr + SD_RESPONSE3);
 232                 buf[11] = data & 0xff;
 233                 buf[4] = data >> 8;
 234                 data = ioread16(host->ioaddr + SD_RESPONSE4);
 235                 buf[5] = data & 0xff;
 236                 buf[6] = data >> 8;
 237                 data = ioread16(host->ioaddr + SD_RESPONSE5);
 238                 buf[7] = data & 0xff;
 239                 buf[0] = data >> 8;
 240                 data = ioread16(host->ioaddr + SD_RESPONSE6);
 241                 buf[1] = data & 0xff;
 242                 buf[2] = data >> 8;
 243                 data = ioread16(host->ioaddr + SD_RESPONSE7);
 244                 buf[3] = data & 0xff;
 245         } else if (cmd->flags & MMC_RSP_PRESENT) {
 246                 /* R1, R1B, R3, R6, R7 */
 247                 data = ioread16(host->ioaddr + SD_RESPONSE0);
 248                 buf[0] = data & 0xff;
 249                 buf[1] = data >> 8;
 250                 data = ioread16(host->ioaddr + SD_RESPONSE1);
 251                 buf[2] = data & 0xff;
 252                 buf[3] = data >> 8;
 253         }
 254
 255         dev_dbg(&host->pdev->dev, "Command IRQ complete %d %d %x\n",
 256                 cmd->opcode, cmd->error, cmd->flags);
 257
 258         /* If there is data to handle we will
 259          * finish the request in the mmc_data_end_irq handler.*/
 260         if (host->data)
 261                 return;
 262
 263         toshsd_finish_request(host);
 264 }
 265
 266 static void toshsd_data_end_irq(struct toshsd_host *host)
 267 {
 268         struct mmc_data *data = host->data;
 269
 270         host->data = NULL;
 271
 272         if (!data) {
 273                 dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
 274                 return;
 275         }
 276
 277         if (data->error == 0)
 278                 data->bytes_xfered = data->blocks * data->blksz;
 279         else
 280                 data->bytes_xfered = 0;
 281
 282         dev_dbg(&host->pdev->dev, "Completed data request xfr=%d\n",
 283                 data->bytes_xfered);
 284
 285         iowrite16(0, host->ioaddr + SD_STOPINTERNAL);
 286
 287         toshsd_finish_request(host);
 288 }
 289
 290 static irqreturn_t toshsd_irq(int irq, void *dev_id)
 291 {
 292         struct toshsd_host *host = dev_id;
 293         u32 int_reg, int_mask, int_status, detail;
 294         int error = 0, ret = IRQ_HANDLED;
 295
 296         spin_lock(&host->lock);
 297         int_status = ioread32(host->ioaddr + SD_CARDSTATUS);
 298         int_mask = ioread32(host->ioaddr + SD_INTMASKCARD);
 299         int_reg = int_status & ~int_mask & ~IRQ_DONT_CARE_BITS;
 300
 301         dev_dbg(&host->pdev->dev, "IRQ status:%x mask:%x\n",
 302                 int_status, int_mask);
 303
 304         /* nothing to do: it's not our IRQ */
 305         if (!int_reg) {
 306                 ret = IRQ_NONE;
 307                 goto irq_end;
 308         }
 309
 310         if (int_reg & SD_BUF_CMD_TIMEOUT) {
 311                 error = -ETIMEDOUT;
 312                 dev_dbg(&host->pdev->dev, "Timeout\n");
 313         } else if (int_reg & SD_BUF_CRC_ERR) {
 314                 error = -EILSEQ;
 315                 dev_err(&host->pdev->dev, "BadCRC\n");
 316         } else if (int_reg & (SD_BUF_ILLEGAL_ACCESS
 317                                 | SD_BUF_CMD_INDEX_ERR
 318                                 | SD_BUF_STOP_BIT_END_ERR
 319                                 | SD_BUF_OVERFLOW
 320                                 | SD_BUF_UNDERFLOW
 321                                 | SD_BUF_DATA_TIMEOUT)) {
 322                 dev_err(&host->pdev->dev, "Buffer status error: { %s%s%s%s%s%s}\n",
 323                         int_reg & SD_BUF_ILLEGAL_ACCESS ? "ILLEGAL_ACC " : "",
 324                         int_reg & SD_BUF_CMD_INDEX_ERR ? "CMD_INDEX " : "",
 325                         int_reg & SD_BUF_STOP_BIT_END_ERR ? "STOPBIT_END " : "",
 326                         int_reg & SD_BUF_OVERFLOW ? "OVERFLOW " : "",
 327                         int_reg & SD_BUF_UNDERFLOW ? "UNDERFLOW " : "",
 328                         int_reg & SD_BUF_DATA_TIMEOUT ? "DATA_TIMEOUT " : "");
 329
 330                 detail = ioread32(host->ioaddr + SD_ERRORSTATUS0);
 331                 dev_err(&host->pdev->dev, "detail error status { %s%s%s%s%s%s%s%s%s%s%s%s%s}\n",
 332                         detail & SD_ERR0_RESP_CMD_ERR ? "RESP_CMD " : "",
 333                         detail & SD_ERR0_RESP_NON_CMD12_END_BIT_ERR ? "RESP_END_BIT " : "",
 334                         detail & SD_ERR0_RESP_CMD12_END_BIT_ERR ? "RESP_END_BIT " : "",
 335                         detail & SD_ERR0_READ_DATA_END_BIT_ERR ? "READ_DATA_END_BIT " : "",
 336                         detail & SD_ERR0_WRITE_CRC_STATUS_END_BIT_ERR ? "WRITE_CMD_END_BIT " : "",
 337                         detail & SD_ERR0_RESP_NON_CMD12_CRC_ERR ? "RESP_CRC " : "",
 338                         detail & SD_ERR0_RESP_CMD12_CRC_ERR ? "RESP_CRC " : "",
 339                         detail & SD_ERR0_READ_DATA_CRC_ERR ? "READ_DATA_CRC " : "",
 340                         detail & SD_ERR0_WRITE_CMD_CRC_ERR ? "WRITE_CMD_CRC " : "",
 341                         detail & SD_ERR1_NO_CMD_RESP ? "NO_CMD_RESP " : "",
 342                         detail & SD_ERR1_TIMEOUT_READ_DATA ? "READ_DATA_TIMEOUT " : "",
 343                         detail & SD_ERR1_TIMEOUT_CRS_STATUS ? "CRS_STATUS_TIMEOUT " : "",
 344                         detail & SD_ERR1_TIMEOUT_CRC_BUSY ? "CRC_BUSY_TIMEOUT " : "");
 345                 error = -EIO;
 346         }
 347
 348         if (error) {
 349                 if (host->cmd)
 350                         host->cmd->error = error;
 351
 352                 if (error == -ETIMEDOUT) {
 353                         iowrite32(int_status &
 354                                   ~(SD_BUF_CMD_TIMEOUT | SD_CARD_RESP_END),
 355                                   host->ioaddr + SD_CARDSTATUS);
 356                 } else {
 357                         toshsd_init(host);
 358                         __toshsd_set_ios(host->mmc, &host->mmc->ios);
 359                         goto irq_end;
 360                 }
 361         }
 362
 363         /* Card insert/remove. The mmc controlling code is stateless. */
 364         if (int_reg & (SD_CARD_CARD_INSERTED_0 | SD_CARD_CARD_REMOVED_0)) {
 365                 iowrite32(int_status &
 366                           ~(SD_CARD_CARD_REMOVED_0 | SD_CARD_CARD_INSERTED_0),
 367                           host->ioaddr + SD_CARDSTATUS);
 368
 369                 if (int_reg & SD_CARD_CARD_INSERTED_0)
 370                         toshsd_init(host);
 371
 372                 mmc_detect_change(host->mmc, 1);
 373         }
 374
 375         /* Data transfer */
 376         if (int_reg & (SD_BUF_READ_ENABLE | SD_BUF_WRITE_ENABLE)) {
 377                 iowrite32(int_status &
 378                           ~(SD_BUF_WRITE_ENABLE | SD_BUF_READ_ENABLE),
 379                           host->ioaddr + SD_CARDSTATUS);
 380
 381                 ret = IRQ_WAKE_THREAD;
 382                 goto irq_end;
 383         }
 384
 385         /* Command completion */
 386         if (int_reg & SD_CARD_RESP_END) {
 387                 iowrite32(int_status & ~(SD_CARD_RESP_END),
 388                           host->ioaddr + SD_CARDSTATUS);
 389                 toshsd_cmd_irq(host);
 390         }
 391
 392         /* Data transfer completion */
 393         if (int_reg & SD_CARD_RW_END) {
 394                 iowrite32(int_status & ~(SD_CARD_RW_END),
 395                           host->ioaddr + SD_CARDSTATUS);
 396                 toshsd_data_end_irq(host);
 397         }
 398 irq_end:
 399         spin_unlock(&host->lock);
 400         return ret;
 401 }
 402
 403 static void toshsd_start_cmd(struct toshsd_host *host, struct mmc_command *cmd)
 404 {
 405         struct mmc_data *data = host->data;
 406         int c = cmd->opcode;
 407
 408         dev_dbg(&host->pdev->dev, "Command opcode: %d\n", cmd->opcode);
 409
 410         if (cmd->opcode == MMC_STOP_TRANSMISSION) {
 411                 iowrite16(SD_STOPINT_ISSUE_CMD12,
 412                           host->ioaddr + SD_STOPINTERNAL);
 413
 414                 cmd->resp[0] = cmd->opcode;
 415                 cmd->resp[1] = 0;
 416                 cmd->resp[2] = 0;
 417                 cmd->resp[3] = 0;
 418
 419                 toshsd_finish_request(host);
 420                 return;
 421         }
 422
 423         switch (mmc_resp_type(cmd)) {
 424         case MMC_RSP_NONE:
 425                 c |= SD_CMD_RESP_TYPE_NONE;
 426                 break;
 427
 428         case MMC_RSP_R1:
 429                 c |= SD_CMD_RESP_TYPE_EXT_R1;
 430                 break;
 431         case MMC_RSP_R1B:
 432                 c |= SD_CMD_RESP_TYPE_EXT_R1B;
 433                 break;
 434         case MMC_RSP_R2:
 435                 c |= SD_CMD_RESP_TYPE_EXT_R2;
 436                 break;
 437         case MMC_RSP_R3:
 438                 c |= SD_CMD_RESP_TYPE_EXT_R3;
 439                 break;
 440
 441         default:
 442                 dev_err(&host->pdev->dev, "Unknown response type %d\n",
 443                         mmc_resp_type(cmd));
 444                 break;
 445         }
 446
 447         host->cmd = cmd;
 448
 449         if (cmd->opcode == MMC_APP_CMD)
 450                 c |= SD_CMD_TYPE_ACMD;
 451
 452         if (cmd->opcode == MMC_GO_IDLE_STATE)
 453                 c |= (3 << 8);  /* removed from ipaq-asic3.h for some reason */
 454
 455         if (data) {
 456                 c |= SD_CMD_DATA_PRESENT;
 457
 458                 if (data->blocks > 1) {
 459                         iowrite16(SD_STOPINT_AUTO_ISSUE_CMD12,
 460                                   host->ioaddr + SD_STOPINTERNAL);
 461                         c |= SD_CMD_MULTI_BLOCK;
 462                 }
 463
 464                 if (data->flags & MMC_DATA_READ)
 465                         c |= SD_CMD_TRANSFER_READ;
 466
 467                 /* MMC_DATA_WRITE does not require a bit to be set */
 468         }
 469
 470         /* Send the command */
 471         iowrite32(cmd->arg, host->ioaddr + SD_ARG0);
 472         iowrite16(c, host->ioaddr + SD_CMD);
 473 }
 474
 475 static void toshsd_start_data(struct toshsd_host *host, struct mmc_data *data)
 476 {
 477         unsigned int flags = SG_MITER_ATOMIC;
 478
 479         dev_dbg(&host->pdev->dev, "setup data transfer: blocksize %08x  nr_blocks %d, offset: %08x\n",
 480                 data->blksz, data->blocks, data->sg->offset);
 481
 482         host->data = data;
 483
 484         if (data->flags & MMC_DATA_READ)
 485                 flags |= SG_MITER_TO_SG;
 486         else
 487                 flags |= SG_MITER_FROM_SG;
 488
 489         sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
 490
 491         /* Set transfer length and blocksize */
 492         iowrite16(data->blocks, host->ioaddr + SD_BLOCKCOUNT);
 493         iowrite16(data->blksz, host->ioaddr + SD_CARDXFERDATALEN);
 494 }
 495
 496 /* Process requests from the MMC layer */
 497 static void toshsd_request(struct mmc_host *mmc, struct mmc_request *mrq)
 498 {
 499         struct toshsd_host *host = mmc_priv(mmc);
 500         unsigned long flags;
 501
 502         /* abort if card not present */
 503         if (!(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_PRESENT_0)) {
 504                 mrq->cmd->error = -ENOMEDIUM;
 505                 mmc_request_done(mmc, mrq);
 506                 return;
 507         }
 508
 509         spin_lock_irqsave(&host->lock, flags);
 510
 511         WARN_ON(host->mrq != NULL);
 512
 513         host->mrq = mrq;
 514
 515         if (mrq->data)
 516                 toshsd_start_data(host, mrq->data);
 517
 518         toshsd_set_led(host, 1);
 519
 520         toshsd_start_cmd(host, mrq->cmd);
 521
 522         spin_unlock_irqrestore(&host->lock, flags);
 523 }
 524
 525 static void toshsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 526 {
 527         struct toshsd_host *host = mmc_priv(mmc);
 528         unsigned long flags;
 529
 530         spin_lock_irqsave(&host->lock, flags);
 531         __toshsd_set_ios(mmc, ios);
 532         spin_unlock_irqrestore(&host->lock, flags);
 533 }
 534
 535 static int toshsd_get_ro(struct mmc_host *mmc)
 536 {
 537         struct toshsd_host *host = mmc_priv(mmc);
 538
 539         /* active low */
 540         return !(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_WRITE_PROTECT);
 541 }
 542
 543 static int toshsd_get_cd(struct mmc_host *mmc)
 544 {
 545         struct toshsd_host *host = mmc_priv(mmc);
 546
 547         return !!(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_PRESENT_0);
 548 }
 549
 550 static struct mmc_host_ops toshsd_ops = {
 551         .request = toshsd_request,
 552         .set_ios = toshsd_set_ios,
 553         .get_ro = toshsd_get_ro,
 554         .get_cd = toshsd_get_cd,
 555 };
 556
 557
 558 static void toshsd_powerdown(struct toshsd_host *host)
 559 {
 560         /* mask all interrupts */
 561         iowrite32(0xffffffff, host->ioaddr + SD_INTMASKCARD);
 562         /* disable card clock */
 563         iowrite16(0x000, host->ioaddr + SDIO_BASE + SDIO_CLOCKNWAITCTRL);
 564         iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
 565         /* power down card */
 566         pci_write_config_byte(host->pdev, SD_PCICFG_POWER1, SD_PCICFG_PWR1_OFF);
 567         /* disable clock */
 568         pci_write_config_byte(host->pdev, SD_PCICFG_CLKSTOP, 0);
 569 }
 570
 571 #ifdef CONFIG_PM_SLEEP
 572 static int toshsd_pm_suspend(struct device *dev)
 573 {
 574         struct pci_dev *pdev = to_pci_dev(dev);
 575         struct toshsd_host *host = pci_get_drvdata(pdev);
 576
 577         toshsd_powerdown(host);
 578
 579         pci_save_state(pdev);
 580         pci_enable_wake(pdev, PCI_D3hot, 0);
 581         pci_disable_device(pdev);
 582         pci_set_power_state(pdev, PCI_D3hot);
 583
 584         return 0;
 585 }
 586
 587 static int toshsd_pm_resume(struct device *dev)
 588 {
 589         struct pci_dev *pdev = to_pci_dev(dev);
 590         struct toshsd_host *host = pci_get_drvdata(pdev);
 591         int ret;
 592
 593         pci_set_power_state(pdev, PCI_D0);
 594         pci_restore_state(pdev);
 595         ret = pci_enable_device(pdev);
 596         if (ret)
 597                 return ret;
 598
 599         toshsd_init(host);
 600
 601         return 0;
 602 }
 603 #endif /* CONFIG_PM_SLEEP */
 604
 605 static int toshsd_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 606 {
 607         int ret;
 608         struct toshsd_host *host;
 609         struct mmc_host *mmc;
 610         resource_size_t base;
 611
 612         ret = pci_enable_device(pdev);
 613         if (ret)
 614                 return ret;
 615
 616         mmc = mmc_alloc_host(sizeof(struct toshsd_host), &pdev->dev);
 617         if (!mmc) {
 618                 ret = -ENOMEM;
 619                 goto err;
 620         }
 621
 622         host = mmc_priv(mmc);
 623         host->mmc = mmc;
 624
 625         host->pdev = pdev;
 626         pci_set_drvdata(pdev, host);
 627
 628         ret = pci_request_regions(pdev, DRIVER_NAME);
 629         if (ret)
 630                 goto free;
 631
 632         host->ioaddr = pci_iomap(pdev, 0, 0);
 633         if (!host->ioaddr) {
 634                 ret = -ENOMEM;
 635                 goto release;
 636         }
 637
 638         /* Set MMC host parameters */
 639         mmc->ops = &toshsd_ops;
 640         mmc->caps = MMC_CAP_4_BIT_DATA;
 641         mmc->ocr_avail = MMC_VDD_32_33;
 642
 643         mmc->f_min = HCLK / 512;
 644         mmc->f_max = HCLK;
 645
 646         spin_lock_init(&host->lock);
 647
 648         toshsd_init(host);
 649
 650         ret = request_threaded_irq(pdev->irq, toshsd_irq, toshsd_thread_irq,
 651                                    IRQF_SHARED, DRIVER_NAME, host);
 652         if (ret)
 653                 goto unmap;
 654
 655         mmc_add_host(mmc);
 656
 657         base = pci_resource_start(pdev, 0);
 658         dev_dbg(&pdev->dev, "MMIO %pa, IRQ %d\n", &base, pdev->irq);
 659
 660         pm_suspend_ignore_children(&pdev->dev, 1);
 661
 662         return 0;
 663
 664 unmap:
 665         pci_iounmap(pdev, host->ioaddr);
 666 release:
 667         pci_release_regions(pdev);
 668 free:
 669         mmc_free_host(mmc);
 670         pci_set_drvdata(pdev, NULL);
 671 err:
 672         pci_disable_device(pdev);
 673         return ret;
 674 }
 675
 676 static void toshsd_remove(struct pci_dev *pdev)
 677 {
 678         struct toshsd_host *host = pci_get_drvdata(pdev);
 679
 680         mmc_remove_host(host->mmc);
 681         toshsd_powerdown(host);
 682         free_irq(pdev->irq, host);
 683         pci_iounmap(pdev, host->ioaddr);
 684         pci_release_regions(pdev);
 685         mmc_free_host(host->mmc);
 686         pci_set_drvdata(pdev, NULL);
 687         pci_disable_device(pdev);
 688 }
 689
 690 static const struct dev_pm_ops toshsd_pm_ops = {
 691         SET_SYSTEM_SLEEP_PM_OPS(toshsd_pm_suspend, toshsd_pm_resume)
 692 };
 693
 694 static struct pci_driver toshsd_driver = {
 695         .name = DRIVER_NAME,
 696         .id_table = pci_ids,
 697         .probe = toshsd_probe,
 698         .remove = toshsd_remove,
 699         .driver.pm = &toshsd_pm_ops,
 700 };
 701
 702 static int __init toshsd_drv_init(void)
 703 {
 704         return pci_register_driver(&toshsd_driver);
 705 }
 706
 707 static void __exit toshsd_drv_exit(void)
 708 {
 709         pci_unregister_driver(&toshsd_driver);
 710 }
 711
 712 module_init(toshsd_drv_init);
 713 module_exit(toshsd_drv_exit);
 714
 715 MODULE_AUTHOR("Ondrej Zary, Richard Betts");
 716 MODULE_DESCRIPTION("Toshiba PCI Secure Digital Host Controller Interface driver");
 717 MODULE_LICENSE("GPL");