drivers/mfd/rtsx_pcr.c

   1 /* Driver for Realtek PCI-Express card reader
   2  *
   3  * Copyright(c) 2009-2013 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 <[email protected]>
  20  */
  21
  22 #include <linux/pci.h>
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/dma-mapping.h>
  26 #include <linux/highmem.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/delay.h>
  29 #include <linux/idr.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/mfd/core.h>
  32 #include <linux/mfd/rtsx_pci.h>
  33 #include <linux/mmc/card.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 const struct pci_device_id 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, 0x522A), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  60         { PCI_DEVICE(0x10EC, 0x5249), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  61         { PCI_DEVICE(0x10EC, 0x5287), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  62         { PCI_DEVICE(0x10EC, 0x5286), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  63         { PCI_DEVICE(0x10EC, 0x524A), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  64         { PCI_DEVICE(0x10EC, 0x525A), PCI_CLASS_OTHERS << 16, 0xFF0000 },
  65         { 0, }
  66 };
  67
  68 MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
  69
  70 static inline void rtsx_pci_enable_aspm(struct rtsx_pcr *pcr)
  71 {
  72         rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
  73                 0xFC, pcr->aspm_en);
  74 }
  75
  76 static inline void rtsx_pci_disable_aspm(struct rtsx_pcr *pcr)
  77 {
  78         rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
  79                 0xFC, 0);
  80 }
  81
  82 int rtsx_comm_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
  83 {
  84         rtsx_pci_write_register(pcr, MSGTXDATA0,
  85                                 MASK_8_BIT_DEF, (u8) (latency & 0xFF));
  86         rtsx_pci_write_register(pcr, MSGTXDATA1,
  87                                 MASK_8_BIT_DEF, (u8)((latency >> 8) & 0xFF));
  88         rtsx_pci_write_register(pcr, MSGTXDATA2,
  89                                 MASK_8_BIT_DEF, (u8)((latency >> 16) & 0xFF));
  90         rtsx_pci_write_register(pcr, MSGTXDATA3,
  91                                 MASK_8_BIT_DEF, (u8)((latency >> 24) & 0xFF));
  92         rtsx_pci_write_register(pcr, LTR_CTL, LTR_TX_EN_MASK |
  93                 LTR_LATENCY_MODE_MASK, LTR_TX_EN_1 | LTR_LATENCY_MODE_SW);
  94
  95         return 0;
  96 }
  97
  98 int rtsx_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
  99 {
 100         if (pcr->ops->set_ltr_latency)
 101                 return pcr->ops->set_ltr_latency(pcr, latency);
 102         else
 103                 return rtsx_comm_set_ltr_latency(pcr, latency);
 104 }
 105
 106 static void rtsx_comm_set_aspm(struct rtsx_pcr *pcr, bool enable)
 107 {
 108         struct rtsx_cr_option *option = &pcr->option;
 109
 110         if (pcr->aspm_enabled == enable)
 111                 return;
 112
 113         if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
 114                 if (enable)
 115                         rtsx_pci_enable_aspm(pcr);
 116                 else
 117                         rtsx_pci_disable_aspm(pcr);
 118         } else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
 119                 u8 mask = FORCE_ASPM_VAL_MASK;
 120                 u8 val = 0;
 121
 122                 if (enable)
 123                         val = pcr->aspm_en;
 124                 rtsx_pci_write_register(pcr, ASPM_FORCE_CTL,  mask, val);
 125         }
 126
 127         pcr->aspm_enabled = enable;
 128 }
 129
 130 static void rtsx_disable_aspm(struct rtsx_pcr *pcr)
 131 {
 132         if (pcr->ops->set_aspm)
 133                 pcr->ops->set_aspm(pcr, false);
 134         else
 135                 rtsx_comm_set_aspm(pcr, false);
 136 }
 137
 138 int rtsx_set_l1off_sub(struct rtsx_pcr *pcr, u8 val)
 139 {
 140         rtsx_pci_write_register(pcr, L1SUB_CONFIG3, 0xFF, val);
 141
 142         return 0;
 143 }
 144
 145 void rtsx_set_l1off_sub_cfg_d0(struct rtsx_pcr *pcr, int active)
 146 {
 147         if (pcr->ops->set_l1off_cfg_sub_d0)
 148                 pcr->ops->set_l1off_cfg_sub_d0(pcr, active);
 149 }
 150
 151 static void rtsx_comm_pm_full_on(struct rtsx_pcr *pcr)
 152 {
 153         struct rtsx_cr_option *option = &pcr->option;
 154
 155         rtsx_disable_aspm(pcr);
 156
 157         if (option->ltr_enabled)
 158                 rtsx_set_ltr_latency(pcr, option->ltr_active_latency);
 159
 160         if (rtsx_check_dev_flag(pcr, LTR_L1SS_PWR_GATE_EN))
 161                 rtsx_set_l1off_sub_cfg_d0(pcr, 1);
 162 }
 163
 164 void rtsx_pm_full_on(struct rtsx_pcr *pcr)
 165 {
 166         if (pcr->ops->full_on)
 167                 pcr->ops->full_on(pcr);
 168         else
 169                 rtsx_comm_pm_full_on(pcr);
 170 }
 171
 172 void rtsx_pci_start_run(struct rtsx_pcr *pcr)
 173 {
 174         /* If pci device removed, don't queue idle work any more */
 175         if (pcr->remove_pci)
 176                 return;
 177
 178         if (pcr->state != PDEV_STAT_RUN) {
 179                 pcr->state = PDEV_STAT_RUN;
 180                 if (pcr->ops->enable_auto_blink)
 181                         pcr->ops->enable_auto_blink(pcr);
 182                 rtsx_pm_full_on(pcr);
 183         }
 184
 185         mod_delayed_work(system_wq, &pcr->idle_work, msecs_to_jiffies(200));
 186 }
 187 EXPORT_SYMBOL_GPL(rtsx_pci_start_run);
 188
 189 int rtsx_pci_write_register(struct rtsx_pcr *pcr, u16 addr, u8 mask, u8 data)
 190 {
 191         int i;
 192         u32 val = HAIMR_WRITE_START;
 193
 194         val |= (u32)(addr & 0x3FFF) << 16;
 195         val |= (u32)mask << 8;
 196         val |= (u32)data;
 197
 198         rtsx_pci_writel(pcr, RTSX_HAIMR, val);
 199
 200         for (i = 0; i < MAX_RW_REG_CNT; i++) {
 201                 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
 202                 if ((val & HAIMR_TRANS_END) == 0) {
 203                         if (data != (u8)val)
 204                                 return -EIO;
 205                         return 0;
 206                 }
 207         }
 208
 209         return -ETIMEDOUT;
 210 }
 211 EXPORT_SYMBOL_GPL(rtsx_pci_write_register);
 212
 213 int rtsx_pci_read_register(struct rtsx_pcr *pcr, u16 addr, u8 *data)
 214 {
 215         u32 val = HAIMR_READ_START;
 216         int i;
 217
 218         val |= (u32)(addr & 0x3FFF) << 16;
 219         rtsx_pci_writel(pcr, RTSX_HAIMR, val);
 220
 221         for (i = 0; i < MAX_RW_REG_CNT; i++) {
 222                 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
 223                 if ((val & HAIMR_TRANS_END) == 0)
 224                         break;
 225         }
 226
 227         if (i >= MAX_RW_REG_CNT)
 228                 return -ETIMEDOUT;
 229
 230         if (data)
 231                 *data = (u8)(val & 0xFF);
 232
 233         return 0;
 234 }
 235 EXPORT_SYMBOL_GPL(rtsx_pci_read_register);
 236
 237 int __rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val)
 238 {
 239         int err, i, finished = 0;
 240         u8 tmp;
 241
 242         rtsx_pci_init_cmd(pcr);
 243
 244         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA0, 0xFF, (u8)val);
 245         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA1, 0xFF, (u8)(val >> 8));
 246         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
 247         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x81);
 248
 249         err = rtsx_pci_send_cmd(pcr, 100);
 250         if (err < 0)
 251                 return err;
 252
 253         for (i = 0; i < 100000; i++) {
 254                 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
 255                 if (err < 0)
 256                         return err;
 257
 258                 if (!(tmp & 0x80)) {
 259                         finished = 1;
 260                         break;
 261                 }
 262         }
 263
 264         if (!finished)
 265                 return -ETIMEDOUT;
 266
 267         return 0;
 268 }
 269
 270 int rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val)
 271 {
 272         if (pcr->ops->write_phy)
 273                 return pcr->ops->write_phy(pcr, addr, val);
 274
 275         return __rtsx_pci_write_phy_register(pcr, addr, val);
 276 }
 277 EXPORT_SYMBOL_GPL(rtsx_pci_write_phy_register);
 278
 279 int __rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val)
 280 {
 281         int err, i, finished = 0;
 282         u16 data;
 283         u8 *ptr, tmp;
 284
 285         rtsx_pci_init_cmd(pcr);
 286
 287         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
 288         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x80);
 289
 290         err = rtsx_pci_send_cmd(pcr, 100);
 291         if (err < 0)
 292                 return err;
 293
 294         for (i = 0; i < 100000; i++) {
 295                 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
 296                 if (err < 0)
 297                         return err;
 298
 299                 if (!(tmp & 0x80)) {
 300                         finished = 1;
 301                         break;
 302                 }
 303         }
 304
 305         if (!finished)
 306                 return -ETIMEDOUT;
 307
 308         rtsx_pci_init_cmd(pcr);
 309
 310         rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA0, 0, 0);
 311         rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA1, 0, 0);
 312
 313         err = rtsx_pci_send_cmd(pcr, 100);
 314         if (err < 0)
 315                 return err;
 316
 317         ptr = rtsx_pci_get_cmd_data(pcr);
 318         data = ((u16)ptr[1] << 8) | ptr[0];
 319
 320         if (val)
 321                 *val = data;
 322
 323         return 0;
 324 }
 325
 326 int rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val)
 327 {
 328         if (pcr->ops->read_phy)
 329                 return pcr->ops->read_phy(pcr, addr, val);
 330
 331         return __rtsx_pci_read_phy_register(pcr, addr, val);
 332 }
 333 EXPORT_SYMBOL_GPL(rtsx_pci_read_phy_register);
 334
 335 void rtsx_pci_stop_cmd(struct rtsx_pcr *pcr)
 336 {
 337         rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
 338         rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
 339
 340         rtsx_pci_write_register(pcr, DMACTL, 0x80, 0x80);
 341         rtsx_pci_write_register(pcr, RBCTL, 0x80, 0x80);
 342 }
 343 EXPORT_SYMBOL_GPL(rtsx_pci_stop_cmd);
 344
 345 void rtsx_pci_add_cmd(struct rtsx_pcr *pcr,
 346                 u8 cmd_type, u16 reg_addr, u8 mask, u8 data)
 347 {
 348         unsigned long flags;
 349         u32 val = 0;
 350         u32 *ptr = (u32 *)(pcr->host_cmds_ptr);
 351
 352         val |= (u32)(cmd_type & 0x03) << 30;
 353         val |= (u32)(reg_addr & 0x3FFF) << 16;
 354         val |= (u32)mask << 8;
 355         val |= (u32)data;
 356
 357         spin_lock_irqsave(&pcr->lock, flags);
 358         ptr += pcr->ci;
 359         if (pcr->ci < (HOST_CMDS_BUF_LEN / 4)) {
 360                 put_unaligned_le32(val, ptr);
 361                 ptr++;
 362                 pcr->ci++;
 363         }
 364         spin_unlock_irqrestore(&pcr->lock, flags);
 365 }
 366 EXPORT_SYMBOL_GPL(rtsx_pci_add_cmd);
 367
 368 void rtsx_pci_send_cmd_no_wait(struct rtsx_pcr *pcr)
 369 {
 370         u32 val = 1 << 31;
 371
 372         rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
 373
 374         val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
 375         /* Hardware Auto Response */
 376         val |= 0x40000000;
 377         rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
 378 }
 379 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd_no_wait);
 380
 381 int rtsx_pci_send_cmd(struct rtsx_pcr *pcr, int timeout)
 382 {
 383         struct completion trans_done;
 384         u32 val = 1 << 31;
 385         long timeleft;
 386         unsigned long flags;
 387         int err = 0;
 388
 389         spin_lock_irqsave(&pcr->lock, flags);
 390
 391         /* set up data structures for the wakeup system */
 392         pcr->done = &trans_done;
 393         pcr->trans_result = TRANS_NOT_READY;
 394         init_completion(&trans_done);
 395
 396         rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
 397
 398         val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
 399         /* Hardware Auto Response */
 400         val |= 0x40000000;
 401         rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
 402
 403         spin_unlock_irqrestore(&pcr->lock, flags);
 404
 405         /* Wait for TRANS_OK_INT */
 406         timeleft = wait_for_completion_interruptible_timeout(
 407                         &trans_done, msecs_to_jiffies(timeout));
 408         if (timeleft <= 0) {
 409                 pcr_dbg(pcr, "Timeout (%s %d)\n", __func__, __LINE__);
 410                 err = -ETIMEDOUT;
 411                 goto finish_send_cmd;
 412         }
 413
 414         spin_lock_irqsave(&pcr->lock, flags);
 415         if (pcr->trans_result == TRANS_RESULT_FAIL)
 416                 err = -EINVAL;
 417         else if (pcr->trans_result == TRANS_RESULT_OK)
 418                 err = 0;
 419         else if (pcr->trans_result == TRANS_NO_DEVICE)
 420                 err = -ENODEV;
 421         spin_unlock_irqrestore(&pcr->lock, flags);
 422
 423 finish_send_cmd:
 424         spin_lock_irqsave(&pcr->lock, flags);
 425         pcr->done = NULL;
 426         spin_unlock_irqrestore(&pcr->lock, flags);
 427
 428         if ((err < 0) && (err != -ENODEV))
 429                 rtsx_pci_stop_cmd(pcr);
 430
 431         if (pcr->finish_me)
 432                 complete(pcr->finish_me);
 433
 434         return err;
 435 }
 436 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd);
 437
 438 static void rtsx_pci_add_sg_tbl(struct rtsx_pcr *pcr,
 439                 dma_addr_t addr, unsigned int len, int end)
 440 {
 441         u64 *ptr = (u64 *)(pcr->host_sg_tbl_ptr) + pcr->sgi;
 442         u64 val;
 443         u8 option = SG_VALID | SG_TRANS_DATA;
 444
 445         pcr_dbg(pcr, "DMA addr: 0x%x, Len: 0x%x\n", (unsigned int)addr, len);
 446
 447         if (end)
 448                 option |= SG_END;
 449         val = ((u64)addr << 32) | ((u64)len << 12) | option;
 450
 451         put_unaligned_le64(val, ptr);
 452         pcr->sgi++;
 453 }
 454
 455 int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist,
 456                 int num_sg, bool read, int timeout)
 457 {
 458         int err = 0, count;
 459
 460         pcr_dbg(pcr, "--> %s: num_sg = %d\n", __func__, num_sg);
 461         count = rtsx_pci_dma_map_sg(pcr, sglist, num_sg, read);
 462         if (count < 1)
 463                 return -EINVAL;
 464         pcr_dbg(pcr, "DMA mapping count: %d\n", count);
 465
 466         err = rtsx_pci_dma_transfer(pcr, sglist, count, read, timeout);
 467
 468         rtsx_pci_dma_unmap_sg(pcr, sglist, num_sg, read);
 469
 470         return err;
 471 }
 472 EXPORT_SYMBOL_GPL(rtsx_pci_transfer_data);
 473
 474 int rtsx_pci_dma_map_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
 475                 int num_sg, bool read)
 476 {
 477         enum dma_data_direction dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
 478
 479         if (pcr->remove_pci)
 480                 return -EINVAL;
 481
 482         if ((sglist == NULL) || (num_sg <= 0))
 483                 return -EINVAL;
 484
 485         return dma_map_sg(&(pcr->pci->dev), sglist, num_sg, dir);
 486 }
 487 EXPORT_SYMBOL_GPL(rtsx_pci_dma_map_sg);
 488
 489 void rtsx_pci_dma_unmap_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
 490                 int num_sg, bool read)
 491 {
 492         enum dma_data_direction dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
 493
 494         dma_unmap_sg(&(pcr->pci->dev), sglist, num_sg, dir);
 495 }
 496 EXPORT_SYMBOL_GPL(rtsx_pci_dma_unmap_sg);
 497
 498 int rtsx_pci_dma_transfer(struct rtsx_pcr *pcr, struct scatterlist *sglist,
 499                 int count, bool read, int timeout)
 500 {
 501         struct completion trans_done;
 502         struct scatterlist *sg;
 503         dma_addr_t addr;
 504         long timeleft;
 505         unsigned long flags;
 506         unsigned int len;
 507         int i, err = 0;
 508         u32 val;
 509         u8 dir = read ? DEVICE_TO_HOST : HOST_TO_DEVICE;
 510
 511         if (pcr->remove_pci)
 512                 return -ENODEV;
 513
 514         if ((sglist == NULL) || (count < 1))
 515                 return -EINVAL;
 516
 517         val = ((u32)(dir & 0x01) << 29) | TRIG_DMA | ADMA_MODE;
 518         pcr->sgi = 0;
 519         for_each_sg(sglist, sg, count, i) {
 520                 addr = sg_dma_address(sg);
 521                 len = sg_dma_len(sg);
 522                 rtsx_pci_add_sg_tbl(pcr, addr, len, i == count - 1);
 523         }
 524
 525         spin_lock_irqsave(&pcr->lock, flags);
 526
 527         pcr->done = &trans_done;
 528         pcr->trans_result = TRANS_NOT_READY;
 529         init_completion(&trans_done);
 530         rtsx_pci_writel(pcr, RTSX_HDBAR, pcr->host_sg_tbl_addr);
 531         rtsx_pci_writel(pcr, RTSX_HDBCTLR, val);
 532
 533         spin_unlock_irqrestore(&pcr->lock, flags);
 534
 535         timeleft = wait_for_completion_interruptible_timeout(
 536                         &trans_done, msecs_to_jiffies(timeout));
 537         if (timeleft <= 0) {
 538                 pcr_dbg(pcr, "Timeout (%s %d)\n", __func__, __LINE__);
 539                 err = -ETIMEDOUT;
 540                 goto out;
 541         }
 542
 543         spin_lock_irqsave(&pcr->lock, flags);
 544         if (pcr->trans_result == TRANS_RESULT_FAIL) {
 545                 err = -EILSEQ;
 546                 if (pcr->dma_error_count < RTS_MAX_TIMES_FREQ_REDUCTION)
 547                         pcr->dma_error_count++;
 548         }
 549
 550         else if (pcr->trans_result == TRANS_NO_DEVICE)
 551                 err = -ENODEV;
 552         spin_unlock_irqrestore(&pcr->lock, flags);
 553
 554 out:
 555         spin_lock_irqsave(&pcr->lock, flags);
 556         pcr->done = NULL;
 557         spin_unlock_irqrestore(&pcr->lock, flags);
 558
 559         if ((err < 0) && (err != -ENODEV))
 560                 rtsx_pci_stop_cmd(pcr);
 561
 562         if (pcr->finish_me)
 563                 complete(pcr->finish_me);
 564
 565         return err;
 566 }
 567 EXPORT_SYMBOL_GPL(rtsx_pci_dma_transfer);
 568
 569 int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
 570 {
 571         int err;
 572         int i, j;
 573         u16 reg;
 574         u8 *ptr;
 575
 576         if (buf_len > 512)
 577                 buf_len = 512;
 578
 579         ptr = buf;
 580         reg = PPBUF_BASE2;
 581         for (i = 0; i < buf_len / 256; i++) {
 582                 rtsx_pci_init_cmd(pcr);
 583
 584                 for (j = 0; j < 256; j++)
 585                         rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
 586
 587                 err = rtsx_pci_send_cmd(pcr, 250);
 588                 if (err < 0)
 589                         return err;
 590
 591                 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), 256);
 592                 ptr += 256;
 593         }
 594
 595         if (buf_len % 256) {
 596                 rtsx_pci_init_cmd(pcr);
 597
 598                 for (j = 0; j < buf_len % 256; j++)
 599                         rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
 600
 601                 err = rtsx_pci_send_cmd(pcr, 250);
 602                 if (err < 0)
 603                         return err;
 604         }
 605
 606         memcpy(ptr, rtsx_pci_get_cmd_data(pcr), buf_len % 256);
 607
 608         return 0;
 609 }
 610 EXPORT_SYMBOL_GPL(rtsx_pci_read_ppbuf);
 611
 612 int rtsx_pci_write_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
 613 {
 614         int err;
 615         int i, j;
 616         u16 reg;
 617         u8 *ptr;
 618
 619         if (buf_len > 512)
 620                 buf_len = 512;
 621
 622         ptr = buf;
 623         reg = PPBUF_BASE2;
 624         for (i = 0; i < buf_len / 256; i++) {
 625                 rtsx_pci_init_cmd(pcr);
 626
 627                 for (j = 0; j < 256; j++) {
 628                         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 629                                         reg++, 0xFF, *ptr);
 630                         ptr++;
 631                 }
 632
 633                 err = rtsx_pci_send_cmd(pcr, 250);
 634                 if (err < 0)
 635                         return err;
 636         }
 637
 638         if (buf_len % 256) {
 639                 rtsx_pci_init_cmd(pcr);
 640
 641                 for (j = 0; j < buf_len % 256; j++) {
 642                         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 643                                         reg++, 0xFF, *ptr);
 644                         ptr++;
 645                 }
 646
 647                 err = rtsx_pci_send_cmd(pcr, 250);
 648                 if (err < 0)
 649                         return err;
 650         }
 651
 652         return 0;
 653 }
 654 EXPORT_SYMBOL_GPL(rtsx_pci_write_ppbuf);
 655
 656 static int rtsx_pci_set_pull_ctl(struct rtsx_pcr *pcr, const u32 *tbl)
 657 {
 658         rtsx_pci_init_cmd(pcr);
 659
 660         while (*tbl & 0xFFFF0000) {
 661                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 662                                 (u16)(*tbl >> 16), 0xFF, (u8)(*tbl));
 663                 tbl++;
 664         }
 665
 666         return rtsx_pci_send_cmd(pcr, 100);
 667 }
 668
 669 int rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr *pcr, int card)
 670 {
 671         const u32 *tbl;
 672
 673         if (card == RTSX_SD_CARD)
 674                 tbl = pcr->sd_pull_ctl_enable_tbl;
 675         else if (card == RTSX_MS_CARD)
 676                 tbl = pcr->ms_pull_ctl_enable_tbl;
 677         else
 678                 return -EINVAL;
 679
 680         return rtsx_pci_set_pull_ctl(pcr, tbl);
 681 }
 682 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_enable);
 683
 684 int rtsx_pci_card_pull_ctl_disable(struct rtsx_pcr *pcr, int card)
 685 {
 686         const u32 *tbl;
 687
 688         if (card == RTSX_SD_CARD)
 689                 tbl = pcr->sd_pull_ctl_disable_tbl;
 690         else if (card == RTSX_MS_CARD)
 691                 tbl = pcr->ms_pull_ctl_disable_tbl;
 692         else
 693                 return -EINVAL;
 694
 695
 696         return rtsx_pci_set_pull_ctl(pcr, tbl);
 697 }
 698 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_disable);
 699
 700 static void rtsx_pci_enable_bus_int(struct rtsx_pcr *pcr)
 701 {
 702         pcr->bier = TRANS_OK_INT_EN | TRANS_FAIL_INT_EN | SD_INT_EN;
 703
 704         if (pcr->num_slots > 1)
 705                 pcr->bier |= MS_INT_EN;
 706
 707         /* Enable Bus Interrupt */
 708         rtsx_pci_writel(pcr, RTSX_BIER, pcr->bier);
 709
 710         pcr_dbg(pcr, "RTSX_BIER: 0x%08x\n", pcr->bier);
 711 }
 712
 713 static inline u8 double_ssc_depth(u8 depth)
 714 {
 715         return ((depth > 1) ? (depth - 1) : depth);
 716 }
 717
 718 static u8 revise_ssc_depth(u8 ssc_depth, u8 div)
 719 {
 720         if (div > CLK_DIV_1) {
 721                 if (ssc_depth > (div - 1))
 722                         ssc_depth -= (div - 1);
 723                 else
 724                         ssc_depth = SSC_DEPTH_4M;
 725         }
 726
 727         return ssc_depth;
 728 }
 729
 730 int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
 731                 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
 732 {
 733         int err, clk;
 734         u8 n, clk_divider, mcu_cnt, div;
 735         static const u8 depth[] = {
 736                 [RTSX_SSC_DEPTH_4M] = SSC_DEPTH_4M,
 737                 [RTSX_SSC_DEPTH_2M] = SSC_DEPTH_2M,
 738                 [RTSX_SSC_DEPTH_1M] = SSC_DEPTH_1M,
 739                 [RTSX_SSC_DEPTH_500K] = SSC_DEPTH_500K,
 740                 [RTSX_SSC_DEPTH_250K] = SSC_DEPTH_250K,
 741         };
 742
 743         if (initial_mode) {
 744                 /* We use 250k(around) here, in initial stage */
 745                 clk_divider = SD_CLK_DIVIDE_128;
 746                 card_clock = 30000000;
 747         } else {
 748                 clk_divider = SD_CLK_DIVIDE_0;
 749         }
 750         err = rtsx_pci_write_register(pcr, SD_CFG1,
 751                         SD_CLK_DIVIDE_MASK, clk_divider);
 752         if (err < 0)
 753                 return err;
 754
 755         /* Reduce card clock by 20MHz each time a DMA transfer error occurs */
 756         if (card_clock == UHS_SDR104_MAX_DTR &&
 757             pcr->dma_error_count &&
 758             PCI_PID(pcr) == RTS5227_DEVICE_ID)
 759                 card_clock = UHS_SDR104_MAX_DTR -
 760                         (pcr->dma_error_count * 20000000);
 761
 762         card_clock /= 1000000;
 763         pcr_dbg(pcr, "Switch card clock to %dMHz\n", card_clock);
 764
 765         clk = card_clock;
 766         if (!initial_mode && double_clk)
 767                 clk = card_clock * 2;
 768         pcr_dbg(pcr, "Internal SSC clock: %dMHz (cur_clock = %d)\n",
 769                 clk, pcr->cur_clock);
 770
 771         if (clk == pcr->cur_clock)
 772                 return 0;
 773
 774         if (pcr->ops->conv_clk_and_div_n)
 775                 n = (u8)pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
 776         else
 777                 n = (u8)(clk - 2);
 778         if ((clk <= 2) || (n > MAX_DIV_N_PCR))
 779                 return -EINVAL;
 780
 781         mcu_cnt = (u8)(125/clk + 3);
 782         if (mcu_cnt > 15)
 783                 mcu_cnt = 15;
 784
 785         /* Make sure that the SSC clock div_n is not less than MIN_DIV_N_PCR */
 786         div = CLK_DIV_1;
 787         while ((n < MIN_DIV_N_PCR) && (div < CLK_DIV_8)) {
 788                 if (pcr->ops->conv_clk_and_div_n) {
 789                         int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
 790                                         DIV_N_TO_CLK) * 2;
 791                         n = (u8)pcr->ops->conv_clk_and_div_n(dbl_clk,
 792                                         CLK_TO_DIV_N);
 793                 } else {
 794                         n = (n + 2) * 2 - 2;
 795                 }
 796                 div++;
 797         }
 798         pcr_dbg(pcr, "n = %d, div = %d\n", n, div);
 799
 800         ssc_depth = depth[ssc_depth];
 801         if (double_clk)
 802                 ssc_depth = double_ssc_depth(ssc_depth);
 803
 804         ssc_depth = revise_ssc_depth(ssc_depth, div);
 805         pcr_dbg(pcr, "ssc_depth = %d\n", ssc_depth);
 806
 807         rtsx_pci_init_cmd(pcr);
 808         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
 809                         CLK_LOW_FREQ, CLK_LOW_FREQ);
 810         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
 811                         0xFF, (div << 4) | mcu_cnt);
 812         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
 813         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
 814                         SSC_DEPTH_MASK, ssc_depth);
 815         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
 816         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
 817         if (vpclk) {
 818                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 819                                 PHASE_NOT_RESET, 0);
 820                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 821                                 PHASE_NOT_RESET, PHASE_NOT_RESET);
 822         }
 823
 824         err = rtsx_pci_send_cmd(pcr, 2000);
 825         if (err < 0)
 826                 return err;
 827
 828         /* Wait SSC clock stable */
 829         udelay(10);
 830         err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
 831         if (err < 0)
 832                 return err;
 833
 834         pcr->cur_clock = clk;
 835         return 0;
 836 }
 837 EXPORT_SYMBOL_GPL(rtsx_pci_switch_clock);
 838
 839 int rtsx_pci_card_power_on(struct rtsx_pcr *pcr, int card)
 840 {
 841         if (pcr->ops->card_power_on)
 842                 return pcr->ops->card_power_on(pcr, card);
 843
 844         return 0;
 845 }
 846 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_on);
 847
 848 int rtsx_pci_card_power_off(struct rtsx_pcr *pcr, int card)
 849 {
 850         if (pcr->ops->card_power_off)
 851                 return pcr->ops->card_power_off(pcr, card);
 852
 853         return 0;
 854 }
 855 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_off);
 856
 857 int rtsx_pci_card_exclusive_check(struct rtsx_pcr *pcr, int card)
 858 {
 859         static const unsigned int cd_mask[] = {
 860                 [RTSX_SD_CARD] = SD_EXIST,
 861                 [RTSX_MS_CARD] = MS_EXIST
 862         };
 863
 864         if (!(pcr->flags & PCR_MS_PMOS)) {
 865                 /* When using single PMOS, accessing card is not permitted
 866                  * if the existing card is not the designated one.
 867                  */
 868                 if (pcr->card_exist & (~cd_mask[card]))
 869                         return -EIO;
 870         }
 871
 872         return 0;
 873 }
 874 EXPORT_SYMBOL_GPL(rtsx_pci_card_exclusive_check);
 875
 876 int rtsx_pci_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 877 {
 878         if (pcr->ops->switch_output_voltage)
 879                 return pcr->ops->switch_output_voltage(pcr, voltage);
 880
 881         return 0;
 882 }
 883 EXPORT_SYMBOL_GPL(rtsx_pci_switch_output_voltage);
 884
 885 unsigned int rtsx_pci_card_exist(struct rtsx_pcr *pcr)
 886 {
 887         unsigned int val;
 888
 889         val = rtsx_pci_readl(pcr, RTSX_BIPR);
 890         if (pcr->ops->cd_deglitch)
 891                 val = pcr->ops->cd_deglitch(pcr);
 892
 893         return val;
 894 }
 895 EXPORT_SYMBOL_GPL(rtsx_pci_card_exist);
 896
 897 void rtsx_pci_complete_unfinished_transfer(struct rtsx_pcr *pcr)
 898 {
 899         struct completion finish;
 900
 901         pcr->finish_me = &finish;
 902         init_completion(&finish);
 903
 904         if (pcr->done)
 905                 complete(pcr->done);
 906
 907         if (!pcr->remove_pci)
 908                 rtsx_pci_stop_cmd(pcr);
 909
 910         wait_for_completion_interruptible_timeout(&finish,
 911                         msecs_to_jiffies(2));
 912         pcr->finish_me = NULL;
 913 }
 914 EXPORT_SYMBOL_GPL(rtsx_pci_complete_unfinished_transfer);
 915
 916 static void rtsx_pci_card_detect(struct work_struct *work)
 917 {
 918         struct delayed_work *dwork;
 919         struct rtsx_pcr *pcr;
 920         unsigned long flags;
 921         unsigned int card_detect = 0, card_inserted, card_removed;
 922         u32 irq_status;
 923
 924         dwork = to_delayed_work(work);
 925         pcr = container_of(dwork, struct rtsx_pcr, carddet_work);
 926
 927         pcr_dbg(pcr, "--> %s\n", __func__);
 928
 929         mutex_lock(&pcr->pcr_mutex);
 930         spin_lock_irqsave(&pcr->lock, flags);
 931
 932         irq_status = rtsx_pci_readl(pcr, RTSX_BIPR);
 933         pcr_dbg(pcr, "irq_status: 0x%08x\n", irq_status);
 934
 935         irq_status &= CARD_EXIST;
 936         card_inserted = pcr->card_inserted & irq_status;
 937         card_removed = pcr->card_removed;
 938         pcr->card_inserted = 0;
 939         pcr->card_removed = 0;
 940
 941         spin_unlock_irqrestore(&pcr->lock, flags);
 942
 943         if (card_inserted || card_removed) {
 944                 pcr_dbg(pcr, "card_inserted: 0x%x, card_removed: 0x%x\n",
 945                         card_inserted, card_removed);
 946
 947                 if (pcr->ops->cd_deglitch)
 948                         card_inserted = pcr->ops->cd_deglitch(pcr);
 949
 950                 card_detect = card_inserted | card_removed;
 951
 952                 pcr->card_exist |= card_inserted;
 953                 pcr->card_exist &= ~card_removed;
 954         }
 955
 956         mutex_unlock(&pcr->pcr_mutex);
 957
 958         if ((card_detect & SD_EXIST) && pcr->slots[RTSX_SD_CARD].card_event)
 959                 pcr->slots[RTSX_SD_CARD].card_event(
 960                                 pcr->slots[RTSX_SD_CARD].p_dev);
 961         if ((card_detect & MS_EXIST) && pcr->slots[RTSX_MS_CARD].card_event)
 962                 pcr->slots[RTSX_MS_CARD].card_event(
 963                                 pcr->slots[RTSX_MS_CARD].p_dev);
 964 }
 965
 966 static irqreturn_t rtsx_pci_isr(int irq, void *dev_id)
 967 {
 968         struct rtsx_pcr *pcr = dev_id;
 969         u32 int_reg;
 970
 971         if (!pcr)
 972                 return IRQ_NONE;
 973
 974         spin_lock(&pcr->lock);
 975
 976         int_reg = rtsx_pci_readl(pcr, RTSX_BIPR);
 977         /* Clear interrupt flag */
 978         rtsx_pci_writel(pcr, RTSX_BIPR, int_reg);
 979         if ((int_reg & pcr->bier) == 0) {
 980                 spin_unlock(&pcr->lock);
 981                 return IRQ_NONE;
 982         }
 983         if (int_reg == 0xFFFFFFFF) {
 984                 spin_unlock(&pcr->lock);
 985                 return IRQ_HANDLED;
 986         }
 987
 988         int_reg &= (pcr->bier | 0x7FFFFF);
 989
 990         if (int_reg & SD_INT) {
 991                 if (int_reg & SD_EXIST) {
 992                         pcr->card_inserted |= SD_EXIST;
 993                 } else {
 994                         pcr->card_removed |= SD_EXIST;
 995                         pcr->card_inserted &= ~SD_EXIST;
 996                 }
 997                 pcr->dma_error_count = 0;
 998         }
 999
1000         if (int_reg & MS_INT) {
1001                 if (int_reg & MS_EXIST) {
1002                         pcr->card_inserted |= MS_EXIST;
1003                 } else {
1004                         pcr->card_removed |= MS_EXIST;
1005                         pcr->card_inserted &= ~MS_EXIST;
1006                 }
1007         }
1008
1009         if (int_reg & (NEED_COMPLETE_INT | DELINK_INT)) {
1010                 if (int_reg & (TRANS_FAIL_INT | DELINK_INT)) {
1011                         pcr->trans_result = TRANS_RESULT_FAIL;
1012                         if (pcr->done)
1013                                 complete(pcr->done);
1014                 } else if (int_reg & TRANS_OK_INT) {
1015                         pcr->trans_result = TRANS_RESULT_OK;
1016                         if (pcr->done)
1017                                 complete(pcr->done);
1018                 }
1019         }
1020
1021         if (pcr->card_inserted || pcr->card_removed)
1022                 schedule_delayed_work(&pcr->carddet_work,
1023                                 msecs_to_jiffies(200));
1024
1025         spin_unlock(&pcr->lock);
1026         return IRQ_HANDLED;
1027 }
1028
1029 static int rtsx_pci_acquire_irq(struct rtsx_pcr *pcr)
1030 {
1031         pcr_dbg(pcr, "%s: pcr->msi_en = %d, pci->irq = %d\n",
1032                         __func__, pcr->msi_en, pcr->pci->irq);
1033
1034         if (request_irq(pcr->pci->irq, rtsx_pci_isr,
1035                         pcr->msi_en ? 0 : IRQF_SHARED,
1036                         DRV_NAME_RTSX_PCI, pcr)) {
1037                 dev_err(&(pcr->pci->dev),
1038                         "rtsx_sdmmc: unable to grab IRQ %d, disabling device\n",
1039                         pcr->pci->irq);
1040                 return -1;
1041         }
1042
1043         pcr->irq = pcr->pci->irq;
1044         pci_intx(pcr->pci, !pcr->msi_en);
1045
1046         return 0;
1047 }
1048
1049 static void rtsx_enable_aspm(struct rtsx_pcr *pcr)
1050 {
1051         if (pcr->ops->set_aspm)
1052                 pcr->ops->set_aspm(pcr, true);
1053         else
1054                 rtsx_comm_set_aspm(pcr, true);
1055 }
1056
1057 static void rtsx_comm_pm_power_saving(struct rtsx_pcr *pcr)
1058 {
1059         struct rtsx_cr_option *option = &pcr->option;
1060
1061         if (option->ltr_enabled) {
1062                 u32 latency = option->ltr_l1off_latency;
1063
1064                 if (rtsx_check_dev_flag(pcr, L1_SNOOZE_TEST_EN))
1065                         mdelay(option->l1_snooze_delay);
1066
1067                 rtsx_set_ltr_latency(pcr, latency);
1068         }
1069
1070         if (rtsx_check_dev_flag(pcr, LTR_L1SS_PWR_GATE_EN))
1071                 rtsx_set_l1off_sub_cfg_d0(pcr, 0);
1072
1073         rtsx_enable_aspm(pcr);
1074 }
1075
1076 void rtsx_pm_power_saving(struct rtsx_pcr *pcr)
1077 {
1078         if (pcr->ops->power_saving)
1079                 pcr->ops->power_saving(pcr);
1080         else
1081                 rtsx_comm_pm_power_saving(pcr);
1082 }
1083
1084 static void rtsx_pci_idle_work(struct work_struct *work)
1085 {
1086         struct delayed_work *dwork = to_delayed_work(work);
1087         struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, idle_work);
1088
1089         pcr_dbg(pcr, "--> %s\n", __func__);
1090
1091         mutex_lock(&pcr->pcr_mutex);
1092
1093         pcr->state = PDEV_STAT_IDLE;
1094
1095         if (pcr->ops->disable_auto_blink)
1096                 pcr->ops->disable_auto_blink(pcr);
1097         if (pcr->ops->turn_off_led)
1098                 pcr->ops->turn_off_led(pcr);
1099
1100         rtsx_pm_power_saving(pcr);
1101
1102         mutex_unlock(&pcr->pcr_mutex);
1103 }
1104
1105 #ifdef CONFIG_PM
1106 static void rtsx_pci_power_off(struct rtsx_pcr *pcr, u8 pm_state)
1107 {
1108         if (pcr->ops->turn_off_led)
1109                 pcr->ops->turn_off_led(pcr);
1110
1111         rtsx_pci_writel(pcr, RTSX_BIER, 0);
1112         pcr->bier = 0;
1113
1114         rtsx_pci_write_register(pcr, PETXCFG, 0x08, 0x08);
1115         rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, pm_state);
1116
1117         if (pcr->ops->force_power_down)
1118                 pcr->ops->force_power_down(pcr, pm_state);
1119 }
1120 #endif
1121
1122 static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
1123 {
1124         int err;
1125
1126         pcr->pcie_cap = pci_find_capability(pcr->pci, PCI_CAP_ID_EXP);
1127         rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
1128
1129         rtsx_pci_enable_bus_int(pcr);
1130
1131         /* Power on SSC */
1132         err = rtsx_pci_write_register(pcr, FPDCTL, SSC_POWER_DOWN, 0);
1133         if (err < 0)
1134                 return err;
1135
1136         /* Wait SSC power stable */
1137         udelay(200);
1138
1139         rtsx_pci_disable_aspm(pcr);
1140         if (pcr->ops->optimize_phy) {
1141                 err = pcr->ops->optimize_phy(pcr);
1142                 if (err < 0)
1143                         return err;
1144         }
1145
1146         rtsx_pci_init_cmd(pcr);
1147
1148         /* Set mcu_cnt to 7 to ensure data can be sampled properly */
1149         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV, 0x07, 0x07);
1150
1151         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, HOST_SLEEP_STATE, 0x03, 0x00);
1152         /* Disable card clock */
1153         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, 0x1E, 0);
1154         /* Reset delink mode */
1155         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x0A, 0);
1156         /* Card driving select */
1157         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DRIVE_SEL,
1158                         0xFF, pcr->card_drive_sel);
1159         /* Enable SSC Clock */
1160         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1,
1161                         0xFF, SSC_8X_EN | SSC_SEL_4M);
1162         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF, 0x12);
1163         /* Disable cd_pwr_save */
1164         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x16, 0x10);
1165         /* Clear Link Ready Interrupt */
1166         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
1167                         LINK_RDY_INT, LINK_RDY_INT);
1168         /* Enlarge the estimation window of PERST# glitch
1169          * to reduce the chance of invalid card interrupt
1170          */
1171         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PERST_GLITCH_WIDTH, 0xFF, 0x80);
1172         /* Update RC oscillator to 400k
1173          * bit[0] F_HIGH: for RC oscillator, Rst_value is 1'b1
1174          *                1: 2M  0: 400k
1175          */
1176         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RCCTL, 0x01, 0x00);
1177         /* Set interrupt write clear
1178          * bit 1: U_elbi_if_rd_clr_en
1179          *      1: Enable ELBI interrupt[31:22] & [7:0] flag read clear
1180          *      0: ELBI interrupt flag[31:22] & [7:0] only can be write clear
1181          */
1182         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, NFTS_TX_CTRL, 0x02, 0);
1183
1184         err = rtsx_pci_send_cmd(pcr, 100);
1185         if (err < 0)
1186                 return err;
1187
1188         switch (PCI_PID(pcr)) {
1189         case PID_5250:
1190         case PID_524A:
1191         case PID_525A:
1192                 rtsx_pci_write_register(pcr, PM_CLK_FORCE_CTL, 1, 1);
1193                 break;
1194         default:
1195                 break;
1196         }
1197
1198         /* Enable clk_request_n to enable clock power management */
1199         rtsx_pci_write_config_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL + 1, 1);
1200         /* Enter L1 when host tx idle */
1201         rtsx_pci_write_config_byte(pcr, 0x70F, 0x5B);
1202
1203         if (pcr->ops->extra_init_hw) {
1204                 err = pcr->ops->extra_init_hw(pcr);
1205                 if (err < 0)
1206                         return err;
1207         }
1208
1209         /* No CD interrupt if probing driver with card inserted.
1210          * So we need to initialize pcr->card_exist here.
1211          */
1212         if (pcr->ops->cd_deglitch)
1213                 pcr->card_exist = pcr->ops->cd_deglitch(pcr);
1214         else
1215                 pcr->card_exist = rtsx_pci_readl(pcr, RTSX_BIPR) & CARD_EXIST;
1216
1217         return 0;
1218 }
1219
1220 static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
1221 {
1222         int err;
1223
1224         spin_lock_init(&pcr->lock);
1225         mutex_init(&pcr->pcr_mutex);
1226
1227         switch (PCI_PID(pcr)) {
1228         default:
1229         case 0x5209:
1230                 rts5209_init_params(pcr);
1231                 break;
1232
1233         case 0x5229:
1234                 rts5229_init_params(pcr);
1235                 break;
1236
1237         case 0x5289:
1238                 rtl8411_init_params(pcr);
1239                 break;
1240
1241         case 0x5227:
1242                 rts5227_init_params(pcr);
1243                 break;
1244
1245         case 0x522A:
1246                 rts522a_init_params(pcr);
1247                 break;
1248
1249         case 0x5249:
1250                 rts5249_init_params(pcr);
1251                 break;
1252
1253         case 0x524A:
1254                 rts524a_init_params(pcr);
1255                 break;
1256
1257         case 0x525A:
1258                 rts525a_init_params(pcr);
1259                 break;
1260
1261         case 0x5287:
1262                 rtl8411b_init_params(pcr);
1263                 break;
1264
1265         case 0x5286:
1266                 rtl8402_init_params(pcr);
1267                 break;
1268         }
1269
1270         pcr_dbg(pcr, "PID: 0x%04x, IC version: 0x%02x\n",
1271                         PCI_PID(pcr), pcr->ic_version);
1272
1273         pcr->slots = kcalloc(pcr->num_slots, sizeof(struct rtsx_slot),
1274                         GFP_KERNEL);
1275         if (!pcr->slots)
1276                 return -ENOMEM;
1277
1278         if (pcr->ops->fetch_vendor_settings)
1279                 pcr->ops->fetch_vendor_settings(pcr);
1280
1281         pcr_dbg(pcr, "pcr->aspm_en = 0x%x\n", pcr->aspm_en);
1282         pcr_dbg(pcr, "pcr->sd30_drive_sel_1v8 = 0x%x\n",
1283                         pcr->sd30_drive_sel_1v8);
1284         pcr_dbg(pcr, "pcr->sd30_drive_sel_3v3 = 0x%x\n",
1285                         pcr->sd30_drive_sel_3v3);
1286         pcr_dbg(pcr, "pcr->card_drive_sel = 0x%x\n",
1287                         pcr->card_drive_sel);
1288         pcr_dbg(pcr, "pcr->flags = 0x%x\n", pcr->flags);
1289
1290         pcr->state = PDEV_STAT_IDLE;
1291         err = rtsx_pci_init_hw(pcr);
1292         if (err < 0) {
1293                 kfree(pcr->slots);
1294                 return err;
1295         }
1296
1297         return 0;
1298 }
1299
1300 static int rtsx_pci_probe(struct pci_dev *pcidev,
1301                           const struct pci_device_id *id)
1302 {
1303         struct rtsx_pcr *pcr;
1304         struct pcr_handle *handle;
1305         u32 base, len;
1306         int ret, i, bar = 0;
1307
1308         dev_dbg(&(pcidev->dev),
1309                 ": Realtek PCI-E Card Reader found at %s [%04x:%04x] (rev %x)\n",
1310                 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1311                 (int)pcidev->revision);
1312
1313         ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
1314         if (ret < 0)
1315                 return ret;
1316
1317         ret = pci_enable_device(pcidev);
1318         if (ret)
1319                 return ret;
1320
1321         ret = pci_request_regions(pcidev, DRV_NAME_RTSX_PCI);
1322         if (ret)
1323                 goto disable;
1324
1325         pcr = kzalloc(sizeof(*pcr), GFP_KERNEL);
1326         if (!pcr) {
1327                 ret = -ENOMEM;
1328                 goto release_pci;
1329         }
1330
1331         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1332         if (!handle) {
1333                 ret = -ENOMEM;
1334                 goto free_pcr;
1335         }
1336         handle->pcr = pcr;
1337
1338         idr_preload(GFP_KERNEL);
1339         spin_lock(&rtsx_pci_lock);
1340         ret = idr_alloc(&rtsx_pci_idr, pcr, 0, 0, GFP_NOWAIT);
1341         if (ret >= 0)
1342                 pcr->id = ret;
1343         spin_unlock(&rtsx_pci_lock);
1344         idr_preload_end();
1345         if (ret < 0)
1346                 goto free_handle;
1347
1348         pcr->pci = pcidev;
1349         dev_set_drvdata(&pcidev->dev, handle);
1350
1351         if (CHK_PCI_PID(pcr, 0x525A))
1352                 bar = 1;
1353         len = pci_resource_len(pcidev, bar);
1354         base = pci_resource_start(pcidev, bar);
1355         pcr->remap_addr = ioremap_nocache(base, len);
1356         if (!pcr->remap_addr) {
1357                 ret = -ENOMEM;
1358                 goto free_handle;
1359         }
1360
1361         pcr->rtsx_resv_buf = dma_alloc_coherent(&(pcidev->dev),
1362                         RTSX_RESV_BUF_LEN, &(pcr->rtsx_resv_buf_addr),
1363                         GFP_KERNEL);
1364         if (pcr->rtsx_resv_buf == NULL) {
1365                 ret = -ENXIO;
1366                 goto unmap;
1367         }
1368         pcr->host_cmds_ptr = pcr->rtsx_resv_buf;
1369         pcr->host_cmds_addr = pcr->rtsx_resv_buf_addr;
1370         pcr->host_sg_tbl_ptr = pcr->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
1371         pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
1372
1373         pcr->card_inserted = 0;
1374         pcr->card_removed = 0;
1375         INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect);
1376         INIT_DELAYED_WORK(&pcr->idle_work, rtsx_pci_idle_work);
1377
1378         pcr->msi_en = msi_en;
1379         if (pcr->msi_en) {
1380                 ret = pci_enable_msi(pcidev);
1381                 if (ret)
1382                         pcr->msi_en = false;
1383         }
1384
1385         ret = rtsx_pci_acquire_irq(pcr);
1386         if (ret < 0)
1387                 goto disable_msi;
1388
1389         pci_set_master(pcidev);
1390         synchronize_irq(pcr->irq);
1391
1392         ret = rtsx_pci_init_chip(pcr);
1393         if (ret < 0)
1394                 goto disable_irq;
1395
1396         for (i = 0; i < ARRAY_SIZE(rtsx_pcr_cells); i++) {
1397                 rtsx_pcr_cells[i].platform_data = handle;
1398                 rtsx_pcr_cells[i].pdata_size = sizeof(*handle);
1399         }
1400         ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells,
1401                         ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL);
1402         if (ret < 0)
1403                 goto disable_irq;
1404
1405         schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1406
1407         return 0;
1408
1409 disable_irq:
1410         free_irq(pcr->irq, (void *)pcr);
1411 disable_msi:
1412         if (pcr->msi_en)
1413                 pci_disable_msi(pcr->pci);
1414         dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1415                         pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1416 unmap:
1417         iounmap(pcr->remap_addr);
1418 free_handle:
1419         kfree(handle);
1420 free_pcr:
1421         kfree(pcr);
1422 release_pci:
1423         pci_release_regions(pcidev);
1424 disable:
1425         pci_disable_device(pcidev);
1426
1427         return ret;
1428 }
1429
1430 static void rtsx_pci_remove(struct pci_dev *pcidev)
1431 {
1432         struct pcr_handle *handle = pci_get_drvdata(pcidev);
1433         struct rtsx_pcr *pcr = handle->pcr;
1434
1435         pcr->remove_pci = true;
1436
1437         /* Disable interrupts at the pcr level */
1438         spin_lock_irq(&pcr->lock);
1439         rtsx_pci_writel(pcr, RTSX_BIER, 0);
1440         pcr->bier = 0;
1441         spin_unlock_irq(&pcr->lock);
1442
1443         cancel_delayed_work_sync(&pcr->carddet_work);
1444         cancel_delayed_work_sync(&pcr->idle_work);
1445
1446         mfd_remove_devices(&pcidev->dev);
1447
1448         dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1449                         pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1450         free_irq(pcr->irq, (void *)pcr);
1451         if (pcr->msi_en)
1452                 pci_disable_msi(pcr->pci);
1453         iounmap(pcr->remap_addr);
1454
1455         pci_release_regions(pcidev);
1456         pci_disable_device(pcidev);
1457
1458         spin_lock(&rtsx_pci_lock);
1459         idr_remove(&rtsx_pci_idr, pcr->id);
1460         spin_unlock(&rtsx_pci_lock);
1461
1462         kfree(pcr->slots);
1463         kfree(pcr);
1464         kfree(handle);
1465
1466         dev_dbg(&(pcidev->dev),
1467                 ": Realtek PCI-E Card Reader at %s [%04x:%04x] has been removed\n",
1468                 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1469 }
1470
1471 #ifdef CONFIG_PM
1472
1473 static int rtsx_pci_suspend(struct pci_dev *pcidev, pm_message_t state)
1474 {
1475         struct pcr_handle *handle;
1476         struct rtsx_pcr *pcr;
1477
1478         dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1479
1480         handle = pci_get_drvdata(pcidev);
1481         pcr = handle->pcr;
1482
1483         cancel_delayed_work(&pcr->carddet_work);
1484         cancel_delayed_work(&pcr->idle_work);
1485
1486         mutex_lock(&pcr->pcr_mutex);
1487
1488         rtsx_pci_power_off(pcr, HOST_ENTER_S3);
1489
1490         pci_save_state(pcidev);
1491         pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1492         pci_disable_device(pcidev);
1493         pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1494
1495         mutex_unlock(&pcr->pcr_mutex);
1496         return 0;
1497 }
1498
1499 static int rtsx_pci_resume(struct pci_dev *pcidev)
1500 {
1501         struct pcr_handle *handle;
1502         struct rtsx_pcr *pcr;
1503         int ret = 0;
1504
1505         dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1506
1507         handle = pci_get_drvdata(pcidev);
1508         pcr = handle->pcr;
1509
1510         mutex_lock(&pcr->pcr_mutex);
1511
1512         pci_set_power_state(pcidev, PCI_D0);
1513         pci_restore_state(pcidev);
1514         ret = pci_enable_device(pcidev);
1515         if (ret)
1516                 goto out;
1517         pci_set_master(pcidev);
1518
1519         ret = rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
1520         if (ret)
1521                 goto out;
1522
1523         ret = rtsx_pci_init_hw(pcr);
1524         if (ret)
1525                 goto out;
1526
1527         schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1528
1529 out:
1530         mutex_unlock(&pcr->pcr_mutex);
1531         return ret;
1532 }
1533
1534 static void rtsx_pci_shutdown(struct pci_dev *pcidev)
1535 {
1536         struct pcr_handle *handle;
1537         struct rtsx_pcr *pcr;
1538
1539         dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1540
1541         handle = pci_get_drvdata(pcidev);
1542         pcr = handle->pcr;
1543         rtsx_pci_power_off(pcr, HOST_ENTER_S1);
1544
1545         pci_disable_device(pcidev);
1546         free_irq(pcr->irq, (void *)pcr);
1547         if (pcr->msi_en)
1548                 pci_disable_msi(pcr->pci);
1549 }
1550
1551 #else /* CONFIG_PM */
1552
1553 #define rtsx_pci_suspend NULL
1554 #define rtsx_pci_resume NULL
1555 #define rtsx_pci_shutdown NULL
1556
1557 #endif /* CONFIG_PM */
1558
1559 static struct pci_driver rtsx_pci_driver = {
1560         .name = DRV_NAME_RTSX_PCI,
1561         .id_table = rtsx_pci_ids,
1562         .probe = rtsx_pci_probe,
1563         .remove = rtsx_pci_remove,
1564         .suspend = rtsx_pci_suspend,
1565         .resume = rtsx_pci_resume,
1566         .shutdown = rtsx_pci_shutdown,
1567 };
1568 module_pci_driver(rtsx_pci_driver);
1569
1570 MODULE_LICENSE("GPL");
1571 MODULE_AUTHOR("Wei WANG <[email protected]>");
1572 MODULE_DESCRIPTION("Realtek PCI-E Card Reader Driver");