drivers/mfd/rtsx_pcr.c

   1 /* Driver for Realtek PCI-Express card reader
   2  *
   3  * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2, or (at your option) any
   8  * later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * Author:
  19  *   Wei WANG <wei_wang@realsil.com.cn>
  20  *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
  21  */
  22
  23 #include <linux/pci.h>
  24 #include <linux/module.h>
  25 #include <linux/slab.h>
  26 #include <linux/dma-mapping.h>
  27 #include <linux/highmem.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/delay.h>
  30 #include <linux/idr.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/mfd/core.h>
  33 #include <linux/mfd/rtsx_pci.h>
  34 #include <asm/unaligned.h>
  35
  36 #include "rtsx_pcr.h"
  37
  38 static bool msi_en = true;
  39 module_param(msi_en, bool, S_IRUGO | S_IWUSR);
  40 MODULE_PARM_DESC(msi_en, "Enable MSI");
  41
  42 static DEFINE_IDR(rtsx_pci_idr);
  43 static DEFINE_SPINLOCK(rtsx_pci_lock);
  44
  45 static struct mfd_cell rtsx_pcr_cells[] = {
  46         [RTSX_SD_CARD] = {
  47                 .name = DRV_NAME_RTSX_PCI_SDMMC,
  48         },
  49         [RTSX_MS_CARD] = {
  50                 .name = DRV_NAME_RTSX_PCI_MS,
  51         },
  52 };
  53
  54 static DEFINE_PCI_DEVICE_TABLE(rtsx_pci_ids) = {
  55         { PCI_DEVICE(0x10EC, 0x5209), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  56         { PCI_DEVICE(0x10EC, 0x5229), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  57         { PCI_DEVICE(0x10EC, 0x5289), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  58         { PCI_DEVICE(0x10EC, 0x5227), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  59         { PCI_DEVICE(0x10EC, 0x5249), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  60         { PCI_DEVICE(0x10EC, 0x5287), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  61         { 0, }
  62 };
  63
  64 MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
  65
  66 void rtsx_pci_start_run(struct rtsx_pcr *pcr)
  67 {
  68         /* If pci device removed, don't queue idle work any more */
  69         if (pcr->remove_pci)
  70                 return;
  71
  72         if (pcr->state != PDEV_STAT_RUN) {
  73                 pcr->state = PDEV_STAT_RUN;
  74                 if (pcr->ops->enable_auto_blink)
  75                         pcr->ops->enable_auto_blink(pcr);
  76
  77                 if (pcr->aspm_en)
  78                         rtsx_pci_write_config_byte(pcr, LCTLR, 0);
  79         }
  80
  81         mod_delayed_work(system_wq, &pcr->idle_work, msecs_to_jiffies(200));
  82 }
  83 EXPORT_SYMBOL_GPL(rtsx_pci_start_run);
  84
  85 int rtsx_pci_write_register(struct rtsx_pcr *pcr, u16 addr, u8 mask, u8 data)
  86 {
  87         int i;
  88         u32 val = HAIMR_WRITE_START;
  89
  90         val |= (u32)(addr & 0x3FFF) << 16;
  91         val |= (u32)mask << 8;
  92         val |= (u32)data;
  93
  94         rtsx_pci_writel(pcr, RTSX_HAIMR, val);
  95
  96         for (i = 0; i < MAX_RW_REG_CNT; i++) {
  97                 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
  98                 if ((val & HAIMR_TRANS_END) == 0) {
  99                         if (data != (u8)val)
 100                                 return -EIO;
 101                         return 0;
 102                 }
 103         }
 104
 105         return -ETIMEDOUT;
 106 }
 107 EXPORT_SYMBOL_GPL(rtsx_pci_write_register);
 108
 109 int rtsx_pci_read_register(struct rtsx_pcr *pcr, u16 addr, u8 *data)
 110 {
 111         u32 val = HAIMR_READ_START;
 112         int i;
 113
 114         val |= (u32)(addr & 0x3FFF) << 16;
 115         rtsx_pci_writel(pcr, RTSX_HAIMR, val);
 116
 117         for (i = 0; i < MAX_RW_REG_CNT; i++) {
 118                 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
 119                 if ((val & HAIMR_TRANS_END) == 0)
 120                         break;
 121         }
 122
 123         if (i >= MAX_RW_REG_CNT)
 124                 return -ETIMEDOUT;
 125
 126         if (data)
 127                 *data = (u8)(val & 0xFF);
 128
 129         return 0;
 130 }
 131 EXPORT_SYMBOL_GPL(rtsx_pci_read_register);
 132
 133 int rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val)
 134 {
 135         int err, i, finished = 0;
 136         u8 tmp;
 137
 138         rtsx_pci_init_cmd(pcr);
 139
 140         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA0, 0xFF, (u8)val);
 141         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA1, 0xFF, (u8)(val >> 8));
 142         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
 143         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x81);
 144
 145         err = rtsx_pci_send_cmd(pcr, 100);
 146         if (err < 0)
 147                 return err;
 148
 149         for (i = 0; i < 100000; i++) {
 150                 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
 151                 if (err < 0)
 152                         return err;
 153
 154                 if (!(tmp & 0x80)) {
 155                         finished = 1;
 156                         break;
 157                 }
 158         }
 159
 160         if (!finished)
 161                 return -ETIMEDOUT;
 162
 163         return 0;
 164 }
 165 EXPORT_SYMBOL_GPL(rtsx_pci_write_phy_register);
 166
 167 int rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val)
 168 {
 169         int err, i, finished = 0;
 170         u16 data;
 171         u8 *ptr, tmp;
 172
 173         rtsx_pci_init_cmd(pcr);
 174
 175         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
 176         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x80);
 177
 178         err = rtsx_pci_send_cmd(pcr, 100);
 179         if (err < 0)
 180                 return err;
 181
 182         for (i = 0; i < 100000; i++) {
 183                 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
 184                 if (err < 0)
 185                         return err;
 186
 187                 if (!(tmp & 0x80)) {
 188                         finished = 1;
 189                         break;
 190                 }
 191         }
 192
 193         if (!finished)
 194                 return -ETIMEDOUT;
 195
 196         rtsx_pci_init_cmd(pcr);
 197
 198         rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA0, 0, 0);
 199         rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA1, 0, 0);
 200
 201         err = rtsx_pci_send_cmd(pcr, 100);
 202         if (err < 0)
 203                 return err;
 204
 205         ptr = rtsx_pci_get_cmd_data(pcr);
 206         data = ((u16)ptr[1] << 8) | ptr[0];
 207
 208         if (val)
 209                 *val = data;
 210
 211         return 0;
 212 }
 213 EXPORT_SYMBOL_GPL(rtsx_pci_read_phy_register);
 214
 215 void rtsx_pci_stop_cmd(struct rtsx_pcr *pcr)
 216 {
 217         rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
 218         rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
 219
 220         rtsx_pci_write_register(pcr, DMACTL, 0x80, 0x80);
 221         rtsx_pci_write_register(pcr, RBCTL, 0x80, 0x80);
 222 }
 223 EXPORT_SYMBOL_GPL(rtsx_pci_stop_cmd);
 224
 225 void rtsx_pci_add_cmd(struct rtsx_pcr *pcr,
 226                 u8 cmd_type, u16 reg_addr, u8 mask, u8 data)
 227 {
 228         unsigned long flags;
 229         u32 val = 0;
 230         u32 *ptr = (u32 *)(pcr->host_cmds_ptr);
 231
 232         val |= (u32)(cmd_type & 0x03) << 30;
 233         val |= (u32)(reg_addr & 0x3FFF) << 16;
 234         val |= (u32)mask << 8;
 235         val |= (u32)data;
 236
 237         spin_lock_irqsave(&pcr->lock, flags);
 238         ptr += pcr->ci;
 239         if (pcr->ci < (HOST_CMDS_BUF_LEN / 4)) {
 240                 put_unaligned_le32(val, ptr);
 241                 ptr++;
 242                 pcr->ci++;
 243         }
 244         spin_unlock_irqrestore(&pcr->lock, flags);
 245 }
 246 EXPORT_SYMBOL_GPL(rtsx_pci_add_cmd);
 247
 248 void rtsx_pci_send_cmd_no_wait(struct rtsx_pcr *pcr)
 249 {
 250         u32 val = 1 << 31;
 251
 252         rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
 253
 254         val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
 255         /* Hardware Auto Response */
 256         val |= 0x40000000;
 257         rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
 258 }
 259 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd_no_wait);
 260
 261 int rtsx_pci_send_cmd(struct rtsx_pcr *pcr, int timeout)
 262 {
 263         struct completion trans_done;
 264         u32 val = 1 << 31;
 265         long timeleft;
 266         unsigned long flags;
 267         int err = 0;
 268
 269         spin_lock_irqsave(&pcr->lock, flags);
 270
 271         /* set up data structures for the wakeup system */
 272         pcr->done = &trans_done;
 273         pcr->trans_result = TRANS_NOT_READY;
 274         init_completion(&trans_done);
 275
 276         rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
 277
 278         val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
 279         /* Hardware Auto Response */
 280         val |= 0x40000000;
 281         rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
 282
 283         spin_unlock_irqrestore(&pcr->lock, flags);
 284
 285         /* Wait for TRANS_OK_INT */
 286         timeleft = wait_for_completion_interruptible_timeout(
 287                         &trans_done, msecs_to_jiffies(timeout));
 288         if (timeleft <= 0) {
 289                 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
 290                                 __func__, __LINE__);
 291                 err = -ETIMEDOUT;
 292                 goto finish_send_cmd;
 293         }
 294
 295         spin_lock_irqsave(&pcr->lock, flags);
 296         if (pcr->trans_result == TRANS_RESULT_FAIL)
 297                 err = -EINVAL;
 298         else if (pcr->trans_result == TRANS_RESULT_OK)
 299                 err = 0;
 300         else if (pcr->trans_result == TRANS_NO_DEVICE)
 301                 err = -ENODEV;
 302         spin_unlock_irqrestore(&pcr->lock, flags);
 303
 304 finish_send_cmd:
 305         spin_lock_irqsave(&pcr->lock, flags);
 306         pcr->done = NULL;
 307         spin_unlock_irqrestore(&pcr->lock, flags);
 308
 309         if ((err < 0) && (err != -ENODEV))
 310                 rtsx_pci_stop_cmd(pcr);
 311
 312         if (pcr->finish_me)
 313                 complete(pcr->finish_me);
 314
 315         return err;
 316 }
 317 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd);
 318
 319 static void rtsx_pci_add_sg_tbl(struct rtsx_pcr *pcr,
 320                 dma_addr_t addr, unsigned int len, int end)
 321 {
 322         u64 *ptr = (u64 *)(pcr->host_sg_tbl_ptr) + pcr->sgi;
 323         u64 val;
 324         u8 option = SG_VALID | SG_TRANS_DATA;
 325
 326         dev_dbg(&(pcr->pci->dev), "DMA addr: 0x%x, Len: 0x%x\n",
 327                         (unsigned int)addr, len);
 328
 329         if (end)
 330                 option |= SG_END;
 331         val = ((u64)addr << 32) | ((u64)len << 12) | option;
 332
 333         put_unaligned_le64(val, ptr);
 334         pcr->sgi++;
 335 }
 336
 337 int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist,
 338                 int num_sg, bool read, int timeout)
 339 {
 340         struct completion trans_done;
 341         u8 dir;
 342         int err = 0, i, count;
 343         long timeleft;
 344         unsigned long flags;
 345         struct scatterlist *sg;
 346         enum dma_data_direction dma_dir;
 347         u32 val;
 348         dma_addr_t addr;
 349         unsigned int len;
 350
 351         dev_dbg(&(pcr->pci->dev), "--> %s: num_sg = %d\n", __func__, num_sg);
 352
 353         /* don't transfer data during abort processing */
 354         if (pcr->remove_pci)
 355                 return -EINVAL;
 356
 357         if ((sglist == NULL) || (num_sg <= 0))
 358                 return -EINVAL;
 359
 360         if (read) {
 361                 dir = DEVICE_TO_HOST;
 362                 dma_dir = DMA_FROM_DEVICE;
 363         } else {
 364                 dir = HOST_TO_DEVICE;
 365                 dma_dir = DMA_TO_DEVICE;
 366         }
 367
 368         count = dma_map_sg(&(pcr->pci->dev), sglist, num_sg, dma_dir);
 369         if (count < 1) {
 370                 dev_err(&(pcr->pci->dev), "scatterlist map failed\n");
 371                 return -EINVAL;
 372         }
 373         dev_dbg(&(pcr->pci->dev), "DMA mapping count: %d\n", count);
 374
 375         val = ((u32)(dir & 0x01) << 29) | TRIG_DMA | ADMA_MODE;
 376         pcr->sgi = 0;
 377         for_each_sg(sglist, sg, count, i) {
 378                 addr = sg_dma_address(sg);
 379                 len = sg_dma_len(sg);
 380                 rtsx_pci_add_sg_tbl(pcr, addr, len, i == count - 1);
 381         }
 382
 383         spin_lock_irqsave(&pcr->lock, flags);
 384
 385         pcr->done = &trans_done;
 386         pcr->trans_result = TRANS_NOT_READY;
 387         init_completion(&trans_done);
 388         rtsx_pci_writel(pcr, RTSX_HDBAR, pcr->host_sg_tbl_addr);
 389         rtsx_pci_writel(pcr, RTSX_HDBCTLR, val);
 390
 391         spin_unlock_irqrestore(&pcr->lock, flags);
 392
 393         timeleft = wait_for_completion_interruptible_timeout(
 394                         &trans_done, msecs_to_jiffies(timeout));
 395         if (timeleft <= 0) {
 396                 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
 397                                 __func__, __LINE__);
 398                 err = -ETIMEDOUT;
 399                 goto out;
 400         }
 401
 402         spin_lock_irqsave(&pcr->lock, flags);
 403
 404         if (pcr->trans_result == TRANS_RESULT_FAIL)
 405                 err = -EINVAL;
 406         else if (pcr->trans_result == TRANS_NO_DEVICE)
 407                 err = -ENODEV;
 408
 409         spin_unlock_irqrestore(&pcr->lock, flags);
 410
 411 out:
 412         spin_lock_irqsave(&pcr->lock, flags);
 413         pcr->done = NULL;
 414         spin_unlock_irqrestore(&pcr->lock, flags);
 415
 416         dma_unmap_sg(&(pcr->pci->dev), sglist, num_sg, dma_dir);
 417
 418         if ((err < 0) && (err != -ENODEV))
 419                 rtsx_pci_stop_cmd(pcr);
 420
 421         if (pcr->finish_me)
 422                 complete(pcr->finish_me);
 423
 424         return err;
 425 }
 426 EXPORT_SYMBOL_GPL(rtsx_pci_transfer_data);
 427
 428 int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
 429 {
 430         int err;
 431         int i, j;
 432         u16 reg;
 433         u8 *ptr;
 434
 435         if (buf_len > 512)
 436                 buf_len = 512;
 437
 438         ptr = buf;
 439         reg = PPBUF_BASE2;
 440         for (i = 0; i < buf_len / 256; i++) {
 441                 rtsx_pci_init_cmd(pcr);
 442
 443                 for (j = 0; j < 256; j++)
 444                         rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
 445
 446                 err = rtsx_pci_send_cmd(pcr, 250);
 447                 if (err < 0)
 448                         return err;
 449
 450                 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), 256);
 451                 ptr += 256;
 452         }
 453
 454         if (buf_len % 256) {
 455                 rtsx_pci_init_cmd(pcr);
 456
 457                 for (j = 0; j < buf_len % 256; j++)
 458                         rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
 459
 460                 err = rtsx_pci_send_cmd(pcr, 250);
 461                 if (err < 0)
 462                         return err;
 463         }
 464
 465         memcpy(ptr, rtsx_pci_get_cmd_data(pcr), buf_len % 256);
 466
 467         return 0;
 468 }
 469 EXPORT_SYMBOL_GPL(rtsx_pci_read_ppbuf);
 470
 471 int rtsx_pci_write_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
 472 {
 473         int err;
 474         int i, j;
 475         u16 reg;
 476         u8 *ptr;
 477
 478         if (buf_len > 512)
 479                 buf_len = 512;
 480
 481         ptr = buf;
 482         reg = PPBUF_BASE2;
 483         for (i = 0; i < buf_len / 256; i++) {
 484                 rtsx_pci_init_cmd(pcr);
 485
 486                 for (j = 0; j < 256; j++) {
 487                         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 488                                         reg++, 0xFF, *ptr);
 489                         ptr++;
 490                 }
 491
 492                 err = rtsx_pci_send_cmd(pcr, 250);
 493                 if (err < 0)
 494                         return err;
 495         }
 496
 497         if (buf_len % 256) {
 498                 rtsx_pci_init_cmd(pcr);
 499
 500                 for (j = 0; j < buf_len % 256; j++) {
 501                         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 502                                         reg++, 0xFF, *ptr);
 503                         ptr++;
 504                 }
 505
 506                 err = rtsx_pci_send_cmd(pcr, 250);
 507                 if (err < 0)
 508                         return err;
 509         }
 510
 511         return 0;
 512 }
 513 EXPORT_SYMBOL_GPL(rtsx_pci_write_ppbuf);
 514
 515 static int rtsx_pci_set_pull_ctl(struct rtsx_pcr *pcr, const u32 *tbl)
 516 {
 517         int err;
 518
 519         rtsx_pci_init_cmd(pcr);
 520
 521         while (*tbl & 0xFFFF0000) {
 522                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 523                                 (u16)(*tbl >> 16), 0xFF, (u8)(*tbl));
 524                 tbl++;
 525         }
 526
 527         err = rtsx_pci_send_cmd(pcr, 100);
 528         if (err < 0)
 529                 return err;
 530
 531         return 0;
 532 }
 533
 534 int rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr *pcr, int card)
 535 {
 536         const u32 *tbl;
 537
 538         if (card == RTSX_SD_CARD)
 539                 tbl = pcr->sd_pull_ctl_enable_tbl;
 540         else if (card == RTSX_MS_CARD)
 541                 tbl = pcr->ms_pull_ctl_enable_tbl;
 542         else
 543                 return -EINVAL;
 544
 545         return rtsx_pci_set_pull_ctl(pcr, tbl);
 546 }
 547 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_enable);
 548
 549 int rtsx_pci_card_pull_ctl_disable(struct rtsx_pcr *pcr, int card)
 550 {
 551         const u32 *tbl;
 552
 553         if (card == RTSX_SD_CARD)
 554                 tbl = pcr->sd_pull_ctl_disable_tbl;
 555         else if (card == RTSX_MS_CARD)
 556                 tbl = pcr->ms_pull_ctl_disable_tbl;
 557         else
 558                 return -EINVAL;
 559
 560
 561         return rtsx_pci_set_pull_ctl(pcr, tbl);
 562 }
 563 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_disable);
 564
 565 static void rtsx_pci_enable_bus_int(struct rtsx_pcr *pcr)
 566 {
 567         pcr->bier = TRANS_OK_INT_EN | TRANS_FAIL_INT_EN | SD_INT_EN;
 568
 569         if (pcr->num_slots > 1)
 570                 pcr->bier |= MS_INT_EN;
 571
 572         /* Enable Bus Interrupt */
 573         rtsx_pci_writel(pcr, RTSX_BIER, pcr->bier);
 574
 575         dev_dbg(&(pcr->pci->dev), "RTSX_BIER: 0x%08x\n", pcr->bier);
 576 }
 577
 578 static inline u8 double_ssc_depth(u8 depth)
 579 {
 580         return ((depth > 1) ? (depth - 1) : depth);
 581 }
 582
 583 static u8 revise_ssc_depth(u8 ssc_depth, u8 div)
 584 {
 585         if (div > CLK_DIV_1) {
 586                 if (ssc_depth > (div - 1))
 587                         ssc_depth -= (div - 1);
 588                 else
 589                         ssc_depth = SSC_DEPTH_4M;
 590         }
 591
 592         return ssc_depth;
 593 }
 594
 595 int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
 596                 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
 597 {
 598         int err, clk;
 599         u8 n, clk_divider, mcu_cnt, div;
 600         u8 depth[] = {
 601                 [RTSX_SSC_DEPTH_4M] = SSC_DEPTH_4M,
 602                 [RTSX_SSC_DEPTH_2M] = SSC_DEPTH_2M,
 603                 [RTSX_SSC_DEPTH_1M] = SSC_DEPTH_1M,
 604                 [RTSX_SSC_DEPTH_500K] = SSC_DEPTH_500K,
 605                 [RTSX_SSC_DEPTH_250K] = SSC_DEPTH_250K,
 606         };
 607
 608         if (initial_mode) {
 609                 /* We use 250k(around) here, in initial stage */
 610                 clk_divider = SD_CLK_DIVIDE_128;
 611                 card_clock = 30000000;
 612         } else {
 613                 clk_divider = SD_CLK_DIVIDE_0;
 614         }
 615         err = rtsx_pci_write_register(pcr, SD_CFG1,
 616                         SD_CLK_DIVIDE_MASK, clk_divider);
 617         if (err < 0)
 618                 return err;
 619
 620         card_clock /= 1000000;
 621         dev_dbg(&(pcr->pci->dev), "Switch card clock to %dMHz\n", card_clock);
 622
 623         clk = card_clock;
 624         if (!initial_mode && double_clk)
 625                 clk = card_clock * 2;
 626         dev_dbg(&(pcr->pci->dev),
 627                         "Internal SSC clock: %dMHz (cur_clock = %d)\n",
 628                         clk, pcr->cur_clock);
 629
 630         if (clk == pcr->cur_clock)
 631                 return 0;
 632
 633         if (pcr->ops->conv_clk_and_div_n)
 634                 n = (u8)pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
 635         else
 636                 n = (u8)(clk - 2);
 637         if ((clk <= 2) || (n > MAX_DIV_N_PCR))
 638                 return -EINVAL;
 639
 640         mcu_cnt = (u8)(125/clk + 3);
 641         if (mcu_cnt > 15)
 642                 mcu_cnt = 15;
 643
 644         /* Make sure that the SSC clock div_n is not less than MIN_DIV_N_PCR */
 645         div = CLK_DIV_1;
 646         while ((n < MIN_DIV_N_PCR) && (div < CLK_DIV_8)) {
 647                 if (pcr->ops->conv_clk_and_div_n) {
 648                         int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
 649                                         DIV_N_TO_CLK) * 2;
 650                         n = (u8)pcr->ops->conv_clk_and_div_n(dbl_clk,
 651                                         CLK_TO_DIV_N);
 652                 } else {
 653                         n = (n + 2) * 2 - 2;
 654                 }
 655                 div++;
 656         }
 657         dev_dbg(&(pcr->pci->dev), "n = %d, div = %d\n", n, div);
 658
 659         ssc_depth = depth[ssc_depth];
 660         if (double_clk)
 661                 ssc_depth = double_ssc_depth(ssc_depth);
 662
 663         ssc_depth = revise_ssc_depth(ssc_depth, div);
 664         dev_dbg(&(pcr->pci->dev), "ssc_depth = %d\n", ssc_depth);
 665
 666         rtsx_pci_init_cmd(pcr);
 667         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
 668                         CLK_LOW_FREQ, CLK_LOW_FREQ);
 669         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
 670                         0xFF, (div << 4) | mcu_cnt);
 671         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
 672         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
 673                         SSC_DEPTH_MASK, ssc_depth);
 674         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
 675         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
 676         if (vpclk) {
 677                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 678                                 PHASE_NOT_RESET, 0);
 679                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 680                                 PHASE_NOT_RESET, PHASE_NOT_RESET);
 681         }
 682
 683         err = rtsx_pci_send_cmd(pcr, 2000);
 684         if (err < 0)
 685                 return err;
 686
 687         /* Wait SSC clock stable */
 688         udelay(10);
 689         err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
 690         if (err < 0)
 691                 return err;
 692
 693         pcr->cur_clock = clk;
 694         return 0;
 695 }
 696 EXPORT_SYMBOL_GPL(rtsx_pci_switch_clock);
 697
 698 int rtsx_pci_card_power_on(struct rtsx_pcr *pcr, int card)
 699 {
 700         if (pcr->ops->card_power_on)
 701                 return pcr->ops->card_power_on(pcr, card);
 702
 703         return 0;
 704 }
 705 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_on);
 706
 707 int rtsx_pci_card_power_off(struct rtsx_pcr *pcr, int card)
 708 {
 709         if (pcr->ops->card_power_off)
 710                 return pcr->ops->card_power_off(pcr, card);
 711
 712         return 0;
 713 }
 714 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_off);
 715
 716 int rtsx_pci_card_exclusive_check(struct rtsx_pcr *pcr, int card)
 717 {
 718         unsigned int cd_mask[] = {
 719                 [RTSX_SD_CARD] = SD_EXIST,
 720                 [RTSX_MS_CARD] = MS_EXIST
 721         };
 722
 723         if (!(pcr->flags & PCR_MS_PMOS)) {
 724                 /* When using single PMOS, accessing card is not permitted
 725                  * if the existing card is not the designated one.
 726                  */
 727                 if (pcr->card_exist & (~cd_mask[card]))
 728                         return -EIO;
 729         }
 730
 731         return 0;
 732 }
 733 EXPORT_SYMBOL_GPL(rtsx_pci_card_exclusive_check);
 734
 735 int rtsx_pci_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 736 {
 737         if (pcr->ops->switch_output_voltage)
 738                 return pcr->ops->switch_output_voltage(pcr, voltage);
 739
 740         return 0;
 741 }
 742 EXPORT_SYMBOL_GPL(rtsx_pci_switch_output_voltage);
 743
 744 unsigned int rtsx_pci_card_exist(struct rtsx_pcr *pcr)
 745 {
 746         unsigned int val;
 747
 748         val = rtsx_pci_readl(pcr, RTSX_BIPR);
 749         if (pcr->ops->cd_deglitch)
 750                 val = pcr->ops->cd_deglitch(pcr);
 751
 752         return val;
 753 }
 754 EXPORT_SYMBOL_GPL(rtsx_pci_card_exist);
 755
 756 void rtsx_pci_complete_unfinished_transfer(struct rtsx_pcr *pcr)
 757 {
 758         struct completion finish;
 759
 760         pcr->finish_me = &finish;
 761         init_completion(&finish);
 762
 763         if (pcr->done)
 764                 complete(pcr->done);
 765
 766         if (!pcr->remove_pci)
 767                 rtsx_pci_stop_cmd(pcr);
 768
 769         wait_for_completion_interruptible_timeout(&finish,
 770                         msecs_to_jiffies(2));
 771         pcr->finish_me = NULL;
 772 }
 773 EXPORT_SYMBOL_GPL(rtsx_pci_complete_unfinished_transfer);
 774
 775 static void rtsx_pci_card_detect(struct work_struct *work)
 776 {
 777         struct delayed_work *dwork;
 778         struct rtsx_pcr *pcr;
 779         unsigned long flags;
 780         unsigned int card_detect = 0, card_inserted, card_removed;
 781         u32 irq_status;
 782
 783         dwork = to_delayed_work(work);
 784         pcr = container_of(dwork, struct rtsx_pcr, carddet_work);
 785
 786         dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
 787
 788         mutex_lock(&pcr->pcr_mutex);
 789         spin_lock_irqsave(&pcr->lock, flags);
 790
 791         irq_status = rtsx_pci_readl(pcr, RTSX_BIPR);
 792         dev_dbg(&(pcr->pci->dev), "irq_status: 0x%08x\n", irq_status);
 793
 794         irq_status &= CARD_EXIST;
 795         card_inserted = pcr->card_inserted & irq_status;
 796         card_removed = pcr->card_removed;
 797         pcr->card_inserted = 0;
 798         pcr->card_removed = 0;
 799
 800         spin_unlock_irqrestore(&pcr->lock, flags);
 801
 802         if (card_inserted || card_removed) {
 803                 dev_dbg(&(pcr->pci->dev),
 804                                 "card_inserted: 0x%x, card_removed: 0x%x\n",
 805                                 card_inserted, card_removed);
 806
 807                 if (pcr->ops->cd_deglitch)
 808                         card_inserted = pcr->ops->cd_deglitch(pcr);
 809
 810                 card_detect = card_inserted | card_removed;
 811
 812                 pcr->card_exist |= card_inserted;
 813                 pcr->card_exist &= ~card_removed;
 814         }
 815
 816         mutex_unlock(&pcr->pcr_mutex);
 817
 818         if ((card_detect & SD_EXIST) && pcr->slots[RTSX_SD_CARD].card_event)
 819                 pcr->slots[RTSX_SD_CARD].card_event(
 820                                 pcr->slots[RTSX_SD_CARD].p_dev);
 821         if ((card_detect & MS_EXIST) && pcr->slots[RTSX_MS_CARD].card_event)
 822                 pcr->slots[RTSX_MS_CARD].card_event(
 823                                 pcr->slots[RTSX_MS_CARD].p_dev);
 824 }
 825
 826 static irqreturn_t rtsx_pci_isr(int irq, void *dev_id)
 827 {
 828         struct rtsx_pcr *pcr = dev_id;
 829         u32 int_reg;
 830
 831         if (!pcr)
 832                 return IRQ_NONE;
 833
 834         spin_lock(&pcr->lock);
 835
 836         int_reg = rtsx_pci_readl(pcr, RTSX_BIPR);
 837         /* Clear interrupt flag */
 838         rtsx_pci_writel(pcr, RTSX_BIPR, int_reg);
 839         if ((int_reg & pcr->bier) == 0) {
 840                 spin_unlock(&pcr->lock);
 841                 return IRQ_NONE;
 842         }
 843         if (int_reg == 0xFFFFFFFF) {
 844                 spin_unlock(&pcr->lock);
 845                 return IRQ_HANDLED;
 846         }
 847
 848         int_reg &= (pcr->bier | 0x7FFFFF);
 849
 850         if (int_reg & SD_INT) {
 851                 if (int_reg & SD_EXIST) {
 852                         pcr->card_inserted |= SD_EXIST;
 853                 } else {
 854                         pcr->card_removed |= SD_EXIST;
 855                         pcr->card_inserted &= ~SD_EXIST;
 856                 }
 857         }
 858
 859         if (int_reg & MS_INT) {
 860                 if (int_reg & MS_EXIST) {
 861                         pcr->card_inserted |= MS_EXIST;
 862                 } else {
 863                         pcr->card_removed |= MS_EXIST;
 864                         pcr->card_inserted &= ~MS_EXIST;
 865                 }
 866         }
 867
 868         if (int_reg & (NEED_COMPLETE_INT | DELINK_INT)) {
 869                 if (int_reg & (TRANS_FAIL_INT | DELINK_INT)) {
 870                         pcr->trans_result = TRANS_RESULT_FAIL;
 871                         if (pcr->done)
 872                                 complete(pcr->done);
 873                 } else if (int_reg & TRANS_OK_INT) {
 874                         pcr->trans_result = TRANS_RESULT_OK;
 875                         if (pcr->done)
 876                                 complete(pcr->done);
 877                 }
 878         }
 879
 880         if (pcr->card_inserted || pcr->card_removed)
 881                 schedule_delayed_work(&pcr->carddet_work,
 882                                 msecs_to_jiffies(200));
 883
 884         spin_unlock(&pcr->lock);
 885         return IRQ_HANDLED;
 886 }
 887
 888 static int rtsx_pci_acquire_irq(struct rtsx_pcr *pcr)
 889 {
 890         dev_info(&(pcr->pci->dev), "%s: pcr->msi_en = %d, pci->irq = %d\n",
 891                         __func__, pcr->msi_en, pcr->pci->irq);
 892
 893         if (request_irq(pcr->pci->irq, rtsx_pci_isr,
 894                         pcr->msi_en ? 0 : IRQF_SHARED,
 895                         DRV_NAME_RTSX_PCI, pcr)) {
 896                 dev_err(&(pcr->pci->dev),
 897                         "rtsx_sdmmc: unable to grab IRQ %d, disabling device\n",
 898                         pcr->pci->irq);
 899                 return -1;
 900         }
 901
 902         pcr->irq = pcr->pci->irq;
 903         pci_intx(pcr->pci, !pcr->msi_en);
 904
 905         return 0;
 906 }
 907
 908 static void rtsx_pci_idle_work(struct work_struct *work)
 909 {
 910         struct delayed_work *dwork = to_delayed_work(work);
 911         struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, idle_work);
 912
 913         dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
 914
 915         mutex_lock(&pcr->pcr_mutex);
 916
 917         pcr->state = PDEV_STAT_IDLE;
 918
 919         if (pcr->ops->disable_auto_blink)
 920                 pcr->ops->disable_auto_blink(pcr);
 921         if (pcr->ops->turn_off_led)
 922                 pcr->ops->turn_off_led(pcr);
 923
 924         if (pcr->aspm_en)
 925                 rtsx_pci_write_config_byte(pcr, LCTLR, pcr->aspm_en);
 926
 927         mutex_unlock(&pcr->pcr_mutex);
 928 }
 929
 930 static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
 931 {
 932         int err;
 933
 934         rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
 935
 936         rtsx_pci_enable_bus_int(pcr);
 937
 938         /* Power on SSC */
 939         err = rtsx_pci_write_register(pcr, FPDCTL, SSC_POWER_DOWN, 0);
 940         if (err < 0)
 941                 return err;
 942
 943         /* Wait SSC power stable */
 944         udelay(200);
 945
 946         if (pcr->ops->optimize_phy) {
 947                 err = pcr->ops->optimize_phy(pcr);
 948                 if (err < 0)
 949                         return err;
 950         }
 951
 952         rtsx_pci_init_cmd(pcr);
 953
 954         /* Set mcu_cnt to 7 to ensure data can be sampled properly */
 955         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV, 0x07, 0x07);
 956
 957         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, HOST_SLEEP_STATE, 0x03, 0x00);
 958         /* Disable card clock */
 959         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, 0x1E, 0);
 960         /* Reset ASPM state to default value */
 961         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
 962         /* Reset delink mode */
 963         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x0A, 0);
 964         /* Card driving select */
 965         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DRIVE_SEL,
 966                         0xFF, pcr->card_drive_sel);
 967         /* Enable SSC Clock */
 968         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1,
 969                         0xFF, SSC_8X_EN | SSC_SEL_4M);
 970         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF, 0x12);
 971         /* Disable cd_pwr_save */
 972         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x16, 0x10);
 973         /* Clear Link Ready Interrupt */
 974         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
 975                         LINK_RDY_INT, LINK_RDY_INT);
 976         /* Enlarge the estimation window of PERST# glitch
 977          * to reduce the chance of invalid card interrupt
 978          */
 979         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PERST_GLITCH_WIDTH, 0xFF, 0x80);
 980         /* Update RC oscillator to 400k
 981          * bit[0] F_HIGH: for RC oscillator, Rst_value is 1'b1
 982          *                1: 2M  0: 400k
 983          */
 984         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RCCTL, 0x01, 0x00);
 985         /* Set interrupt write clear
 986          * bit 1: U_elbi_if_rd_clr_en
 987          *      1: Enable ELBI interrupt[31:22] & [7:0] flag read clear
 988          *      0: ELBI interrupt flag[31:22] & [7:0] only can be write clear
 989          */
 990         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, NFTS_TX_CTRL, 0x02, 0);
 991         /* Force CLKREQ# PIN to drive 0 to request clock */
 992         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
 993
 994         err = rtsx_pci_send_cmd(pcr, 100);
 995         if (err < 0)
 996                 return err;
 997
 998         rtsx_pci_write_config_byte(pcr, LCTLR, 0);
 999
1000         /* Enable clk_request_n to enable clock power management */
1001         rtsx_pci_write_config_byte(pcr, 0x81, 1);
1002         /* Enter L1 when host tx idle */
1003         rtsx_pci_write_config_byte(pcr, 0x70F, 0x5B);
1004
1005         if (pcr->ops->extra_init_hw) {
1006                 err = pcr->ops->extra_init_hw(pcr);
1007                 if (err < 0)
1008                         return err;
1009         }
1010
1011         /* No CD interrupt if probing driver with card inserted.
1012          * So we need to initialize pcr->card_exist here.
1013          */
1014         if (pcr->ops->cd_deglitch)
1015                 pcr->card_exist = pcr->ops->cd_deglitch(pcr);
1016         else
1017                 pcr->card_exist = rtsx_pci_readl(pcr, RTSX_BIPR) & CARD_EXIST;
1018
1019         return 0;
1020 }
1021
1022 static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
1023 {
1024         int err;
1025
1026         spin_lock_init(&pcr->lock);
1027         mutex_init(&pcr->pcr_mutex);
1028
1029         switch (PCI_PID(pcr)) {
1030         default:
1031         case 0x5209:
1032                 rts5209_init_params(pcr);
1033                 break;
1034
1035         case 0x5229:
1036                 rts5229_init_params(pcr);
1037                 break;
1038
1039         case 0x5289:
1040                 rtl8411_init_params(pcr);
1041                 break;
1042
1043         case 0x5227:
1044                 rts5227_init_params(pcr);
1045                 break;
1046
1047         case 0x5249:
1048                 rts5249_init_params(pcr);
1049                 break;
1050
1051         case 0x5287:
1052                 rtl8411b_init_params(pcr);
1053                 break;
1054         }
1055
1056         dev_dbg(&(pcr->pci->dev), "PID: 0x%04x, IC version: 0x%02x\n",
1057                         PCI_PID(pcr), pcr->ic_version);
1058
1059         pcr->slots = kcalloc(pcr->num_slots, sizeof(struct rtsx_slot),
1060                         GFP_KERNEL);
1061         if (!pcr->slots)
1062                 return -ENOMEM;
1063
1064         if (pcr->ops->fetch_vendor_settings)
1065                 pcr->ops->fetch_vendor_settings(pcr);
1066
1067         dev_dbg(&(pcr->pci->dev), "pcr->aspm_en = 0x%x\n", pcr->aspm_en);
1068         dev_dbg(&(pcr->pci->dev), "pcr->sd30_drive_sel_1v8 = 0x%x\n",
1069                         pcr->sd30_drive_sel_1v8);
1070         dev_dbg(&(pcr->pci->dev), "pcr->sd30_drive_sel_3v3 = 0x%x\n",
1071                         pcr->sd30_drive_sel_3v3);
1072         dev_dbg(&(pcr->pci->dev), "pcr->card_drive_sel = 0x%x\n",
1073                         pcr->card_drive_sel);
1074         dev_dbg(&(pcr->pci->dev), "pcr->flags = 0x%x\n", pcr->flags);
1075
1076         pcr->state = PDEV_STAT_IDLE;
1077         err = rtsx_pci_init_hw(pcr);
1078         if (err < 0) {
1079                 kfree(pcr->slots);
1080                 return err;
1081         }
1082
1083         return 0;
1084 }
1085
1086 static int rtsx_pci_probe(struct pci_dev *pcidev,
1087                           const struct pci_device_id *id)
1088 {
1089         struct rtsx_pcr *pcr;
1090         struct pcr_handle *handle;
1091         u32 base, len;
1092         int ret, i;
1093
1094         dev_dbg(&(pcidev->dev),
1095                 ": Realtek PCI-E Card Reader found at %s [%04x:%04x] (rev %x)\n",
1096                 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1097                 (int)pcidev->revision);
1098
1099         ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
1100         if (ret < 0)
1101                 return ret;
1102
1103         ret = pci_enable_device(pcidev);
1104         if (ret)
1105                 return ret;
1106
1107         ret = pci_request_regions(pcidev, DRV_NAME_RTSX_PCI);
1108         if (ret)
1109                 goto disable;
1110
1111         pcr = kzalloc(sizeof(*pcr), GFP_KERNEL);
1112         if (!pcr) {
1113                 ret = -ENOMEM;
1114                 goto release_pci;
1115         }
1116
1117         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1118         if (!handle) {
1119                 ret = -ENOMEM;
1120                 goto free_pcr;
1121         }
1122         handle->pcr = pcr;
1123
1124         idr_preload(GFP_KERNEL);
1125         spin_lock(&rtsx_pci_lock);
1126         ret = idr_alloc(&rtsx_pci_idr, pcr, 0, 0, GFP_NOWAIT);
1127         if (ret >= 0)
1128                 pcr->id = ret;
1129         spin_unlock(&rtsx_pci_lock);
1130         idr_preload_end();
1131         if (ret < 0)
1132                 goto free_handle;
1133
1134         pcr->pci = pcidev;
1135         dev_set_drvdata(&pcidev->dev, handle);
1136
1137         len = pci_resource_len(pcidev, 0);
1138         base = pci_resource_start(pcidev, 0);
1139         pcr->remap_addr = ioremap_nocache(base, len);
1140         if (!pcr->remap_addr) {
1141                 ret = -ENOMEM;
1142                 goto free_host;
1143         }
1144
1145         pcr->rtsx_resv_buf = dma_alloc_coherent(&(pcidev->dev),
1146                         RTSX_RESV_BUF_LEN, &(pcr->rtsx_resv_buf_addr),
1147                         GFP_KERNEL);
1148         if (pcr->rtsx_resv_buf == NULL) {
1149                 ret = -ENXIO;
1150                 goto unmap;
1151         }
1152         pcr->host_cmds_ptr = pcr->rtsx_resv_buf;
1153         pcr->host_cmds_addr = pcr->rtsx_resv_buf_addr;
1154         pcr->host_sg_tbl_ptr = pcr->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
1155         pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
1156
1157         pcr->card_inserted = 0;
1158         pcr->card_removed = 0;
1159         INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect);
1160         INIT_DELAYED_WORK(&pcr->idle_work, rtsx_pci_idle_work);
1161
1162         pcr->msi_en = msi_en;
1163         if (pcr->msi_en) {
1164                 ret = pci_enable_msi(pcidev);
1165                 if (ret < 0)
1166                         pcr->msi_en = false;
1167         }
1168
1169         ret = rtsx_pci_acquire_irq(pcr);
1170         if (ret < 0)
1171                 goto disable_msi;
1172
1173         pci_set_master(pcidev);
1174         synchronize_irq(pcr->irq);
1175
1176         ret = rtsx_pci_init_chip(pcr);
1177         if (ret < 0)
1178                 goto disable_irq;
1179
1180         for (i = 0; i < ARRAY_SIZE(rtsx_pcr_cells); i++) {
1181                 rtsx_pcr_cells[i].platform_data = handle;
1182                 rtsx_pcr_cells[i].pdata_size = sizeof(*handle);
1183         }
1184         ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells,
1185                         ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL);
1186         if (ret < 0)
1187                 goto disable_irq;
1188
1189         schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1190
1191         return 0;
1192
1193 disable_irq:
1194         free_irq(pcr->irq, (void *)pcr);
1195 disable_msi:
1196         if (pcr->msi_en)
1197                 pci_disable_msi(pcr->pci);
1198         dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1199                         pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1200 unmap:
1201         iounmap(pcr->remap_addr);
1202 free_host:
1203         dev_set_drvdata(&pcidev->dev, NULL);
1204 free_handle:
1205         kfree(handle);
1206 free_pcr:
1207         kfree(pcr);
1208 release_pci:
1209         pci_release_regions(pcidev);
1210 disable:
1211         pci_disable_device(pcidev);
1212
1213         return ret;
1214 }
1215
1216 static void rtsx_pci_remove(struct pci_dev *pcidev)
1217 {
1218         struct pcr_handle *handle = pci_get_drvdata(pcidev);
1219         struct rtsx_pcr *pcr = handle->pcr;
1220
1221         pcr->remove_pci = true;
1222
1223         cancel_delayed_work(&pcr->carddet_work);
1224         cancel_delayed_work(&pcr->idle_work);
1225
1226         mfd_remove_devices(&pcidev->dev);
1227
1228         dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1229                         pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1230         free_irq(pcr->irq, (void *)pcr);
1231         if (pcr->msi_en)
1232                 pci_disable_msi(pcr->pci);
1233         iounmap(pcr->remap_addr);
1234
1235         dev_set_drvdata(&pcidev->dev, NULL);
1236         pci_release_regions(pcidev);
1237         pci_disable_device(pcidev);
1238
1239         spin_lock(&rtsx_pci_lock);
1240         idr_remove(&rtsx_pci_idr, pcr->id);
1241         spin_unlock(&rtsx_pci_lock);
1242
1243         kfree(pcr->slots);
1244         kfree(pcr);
1245         kfree(handle);
1246
1247         dev_dbg(&(pcidev->dev),
1248                 ": Realtek PCI-E Card Reader at %s [%04x:%04x] has been removed\n",
1249                 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1250 }
1251
1252 #ifdef CONFIG_PM
1253
1254 static int rtsx_pci_suspend(struct pci_dev *pcidev, pm_message_t state)
1255 {
1256         struct pcr_handle *handle;
1257         struct rtsx_pcr *pcr;
1258         int ret = 0;
1259
1260         dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1261
1262         handle = pci_get_drvdata(pcidev);
1263         pcr = handle->pcr;
1264
1265         cancel_delayed_work(&pcr->carddet_work);
1266         cancel_delayed_work(&pcr->idle_work);
1267
1268         mutex_lock(&pcr->pcr_mutex);
1269
1270         if (pcr->ops->turn_off_led)
1271                 pcr->ops->turn_off_led(pcr);
1272
1273         rtsx_pci_writel(pcr, RTSX_BIER, 0);
1274         pcr->bier = 0;
1275
1276         rtsx_pci_write_register(pcr, PETXCFG, 0x08, 0x08);
1277         rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x02);
1278
1279         pci_save_state(pcidev);
1280         pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1281         pci_disable_device(pcidev);
1282         pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1283
1284         mutex_unlock(&pcr->pcr_mutex);
1285         return ret;
1286 }
1287
1288 static int rtsx_pci_resume(struct pci_dev *pcidev)
1289 {
1290         struct pcr_handle *handle;
1291         struct rtsx_pcr *pcr;
1292         int ret = 0;
1293
1294         dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1295
1296         handle = pci_get_drvdata(pcidev);
1297         pcr = handle->pcr;
1298
1299         mutex_lock(&pcr->pcr_mutex);
1300
1301         pci_set_power_state(pcidev, PCI_D0);
1302         pci_restore_state(pcidev);
1303         ret = pci_enable_device(pcidev);
1304         if (ret)
1305                 goto out;
1306         pci_set_master(pcidev);
1307
1308         ret = rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
1309         if (ret)
1310                 goto out;
1311
1312         ret = rtsx_pci_init_hw(pcr);
1313         if (ret)
1314                 goto out;
1315
1316         schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1317
1318 out:
1319         mutex_unlock(&pcr->pcr_mutex);
1320         return ret;
1321 }
1322
1323 #else /* CONFIG_PM */
1324
1325 #define rtsx_pci_suspend NULL
1326 #define rtsx_pci_resume NULL
1327
1328 #endif /* CONFIG_PM */
1329
1330 static struct pci_driver rtsx_pci_driver = {
1331         .name = DRV_NAME_RTSX_PCI,
1332         .id_table = rtsx_pci_ids,
1333         .probe = rtsx_pci_probe,
1334         .remove = rtsx_pci_remove,
1335         .suspend = rtsx_pci_suspend,
1336         .resume = rtsx_pci_resume,
1337 };
1338 module_pci_driver(rtsx_pci_driver);
1339
1340 MODULE_LICENSE("GPL");
1341 MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1342 MODULE_DESCRIPTION("Realtek PCI-E Card Reader Driver");