drivers/usb/storage/realtek_cr.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Driver for Realtek RTS51xx USB card reader
   4  *
   5  * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
   6  *
   7  * Author:
   8  *   wwang (wei_wang@realsil.com.cn)
   9  *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/blkdev.h>
  14 #include <linux/kthread.h>
  15 #include <linux/sched.h>
  16 #include <linux/kernel.h>
  17
  18 #include <scsi/scsi.h>
  19 #include <scsi/scsi_cmnd.h>
  20 #include <scsi/scsi_device.h>
  21 #include <linux/cdrom.h>
  22
  23 #include <linux/usb.h>
  24 #include <linux/slab.h>
  25 #include <linux/usb_usual.h>
  26
  27 #include "usb.h"
  28 #include "transport.h"
  29 #include "protocol.h"
  30 #include "debug.h"
  31 #include "scsiglue.h"
  32
  33 #define DRV_NAME "ums-realtek"
  34
  35 MODULE_DESCRIPTION("Driver for Realtek USB Card Reader");
  36 MODULE_AUTHOR("wwang <wei_wang@realsil.com.cn>");
  37 MODULE_LICENSE("GPL");
  38 MODULE_IMPORT_NS(USB_STORAGE);
  39
  40 static int auto_delink_en = 1;
  41 module_param(auto_delink_en, int, S_IRUGO | S_IWUSR);
  42 MODULE_PARM_DESC(auto_delink_en, "auto delink mode (0=firmware, 1=software [default])");
  43
  44 #ifdef CONFIG_REALTEK_AUTOPM
  45 static int ss_en = 1;
  46 module_param(ss_en, int, S_IRUGO | S_IWUSR);
  47 MODULE_PARM_DESC(ss_en, "enable selective suspend");
  48
  49 static int ss_delay = 50;
  50 module_param(ss_delay, int, S_IRUGO | S_IWUSR);
  51 MODULE_PARM_DESC(ss_delay,
  52                  "seconds to delay before entering selective suspend");
  53
  54 enum RTS51X_STAT {
  55         RTS51X_STAT_INIT,
  56         RTS51X_STAT_IDLE,
  57         RTS51X_STAT_RUN,
  58         RTS51X_STAT_SS
  59 };
  60
  61 #define POLLING_INTERVAL        50
  62
  63 #define rts51x_set_stat(chip, stat)     \
  64         ((chip)->state = (enum RTS51X_STAT)(stat))
  65 #define rts51x_get_stat(chip)           ((chip)->state)
  66
  67 #define SET_LUN_READY(chip, lun)        ((chip)->lun_ready |= ((u8)1 << (lun)))
  68 #define CLR_LUN_READY(chip, lun)        ((chip)->lun_ready &= ~((u8)1 << (lun)))
  69 #define TST_LUN_READY(chip, lun)        ((chip)->lun_ready & ((u8)1 << (lun)))
  70
  71 #endif
  72
  73 struct rts51x_status {
  74         u16 vid;
  75         u16 pid;
  76         u8 cur_lun;
  77         u8 card_type;
  78         u8 total_lun;
  79         u16 fw_ver;
  80         u8 phy_exist;
  81         u8 multi_flag;
  82         u8 multi_card;
  83         u8 log_exist;
  84         union {
  85                 u8 detailed_type1;
  86                 u8 detailed_type2;
  87         } detailed_type;
  88         u8 function[2];
  89 };
  90
  91 struct rts51x_chip {
  92         u16 vendor_id;
  93         u16 product_id;
  94         char max_lun;
  95
  96         struct rts51x_status *status;
  97         int status_len;
  98
  99         u32 flag;
 100         struct us_data *us;
 101
 102 #ifdef CONFIG_REALTEK_AUTOPM
 103         struct timer_list rts51x_suspend_timer;
 104         unsigned long timer_expires;
 105         int pwr_state;
 106         u8 lun_ready;
 107         enum RTS51X_STAT state;
 108         int support_auto_delink;
 109 #endif
 110         /* used to back up the protocol chosen in probe1 phase */
 111         proto_cmnd proto_handler_backup;
 112 };
 113
 114 /* flag definition */
 115 #define FLIDX_AUTO_DELINK               0x01
 116
 117 #define SCSI_LUN(srb)                   ((srb)->device->lun)
 118
 119 /* Bit Operation */
 120 #define SET_BIT(data, idx)              ((data) |= 1 << (idx))
 121 #define CLR_BIT(data, idx)              ((data) &= ~(1 << (idx)))
 122 #define CHK_BIT(data, idx)              ((data) & (1 << (idx)))
 123
 124 #define SET_AUTO_DELINK(chip)           ((chip)->flag |= FLIDX_AUTO_DELINK)
 125 #define CLR_AUTO_DELINK(chip)           ((chip)->flag &= ~FLIDX_AUTO_DELINK)
 126 #define CHK_AUTO_DELINK(chip)           ((chip)->flag & FLIDX_AUTO_DELINK)
 127
 128 #define RTS51X_GET_VID(chip)            ((chip)->vendor_id)
 129 #define RTS51X_GET_PID(chip)            ((chip)->product_id)
 130
 131 #define VENDOR_ID(chip)                 ((chip)->status[0].vid)
 132 #define PRODUCT_ID(chip)                ((chip)->status[0].pid)
 133 #define FW_VERSION(chip)                ((chip)->status[0].fw_ver)
 134 #define STATUS_LEN(chip)                ((chip)->status_len)
 135
 136 #define STATUS_SUCCESS          0
 137 #define STATUS_FAIL             1
 138
 139 /* Check card reader function */
 140 #define SUPPORT_DETAILED_TYPE1(chip)    \
 141                 CHK_BIT((chip)->status[0].function[0], 1)
 142 #define SUPPORT_OT(chip)                \
 143                 CHK_BIT((chip)->status[0].function[0], 2)
 144 #define SUPPORT_OC(chip)                \
 145                 CHK_BIT((chip)->status[0].function[0], 3)
 146 #define SUPPORT_AUTO_DELINK(chip)       \
 147                 CHK_BIT((chip)->status[0].function[0], 4)
 148 #define SUPPORT_SDIO(chip)              \
 149                 CHK_BIT((chip)->status[0].function[1], 0)
 150 #define SUPPORT_DETAILED_TYPE2(chip)    \
 151                 CHK_BIT((chip)->status[0].function[1], 1)
 152
 153 #define CHECK_PID(chip, pid)            (RTS51X_GET_PID(chip) == (pid))
 154 #define CHECK_FW_VER(chip, fw_ver)      (FW_VERSION(chip) == (fw_ver))
 155 #define CHECK_ID(chip, pid, fw_ver)     \
 156                 (CHECK_PID((chip), (pid)) && CHECK_FW_VER((chip), (fw_ver)))
 157
 158 static int init_realtek_cr(struct us_data *us);
 159
 160 /*
 161  * The table of devices
 162  */
 163 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
 164                     vendorName, productName, useProtocol, useTransport, \
 165                     initFunction, flags) \
 166 {\
 167         USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
 168         .driver_info = (flags) \
 169 }
 170
 171 static const struct usb_device_id realtek_cr_ids[] = {
 172 #       include "unusual_realtek.h"
 173         {}                      /* Terminating entry */
 174 };
 175
 176 MODULE_DEVICE_TABLE(usb, realtek_cr_ids);
 177
 178 #undef UNUSUAL_DEV
 179
 180 /*
 181  * The flags table
 182  */
 183 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
 184                     vendor_name, product_name, use_protocol, use_transport, \
 185                     init_function, Flags) \
 186 { \
 187         .vendorName = vendor_name,      \
 188         .productName = product_name,    \
 189         .useProtocol = use_protocol,    \
 190         .useTransport = use_transport,  \
 191         .initFunction = init_function,  \
 192 }
 193
 194 static struct us_unusual_dev realtek_cr_unusual_dev_list[] = {
 195 #       include "unusual_realtek.h"
 196         {}                      /* Terminating entry */
 197 };
 198
 199 #undef UNUSUAL_DEV
 200
 201 static int rts51x_bulk_transport(struct us_data *us, u8 lun,
 202                                  u8 *cmd, int cmd_len, u8 *buf, int buf_len,
 203                                  enum dma_data_direction dir, int *act_len)
 204 {
 205         struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *)us->iobuf;
 206         struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *)us->iobuf;
 207         int result;
 208         unsigned int residue;
 209         unsigned int cswlen;
 210         unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
 211
 212         /* set up the command wrapper */
 213         bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 214         bcb->DataTransferLength = cpu_to_le32(buf_len);
 215         bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : 0;
 216         bcb->Tag = ++us->tag;
 217         bcb->Lun = lun;
 218         bcb->Length = cmd_len;
 219
 220         /* copy the command payload */
 221         memset(bcb->CDB, 0, sizeof(bcb->CDB));
 222         memcpy(bcb->CDB, cmd, bcb->Length);
 223
 224         /* send it to out endpoint */
 225         result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
 226                                             bcb, cbwlen, NULL);
 227         if (result != USB_STOR_XFER_GOOD)
 228                 return USB_STOR_TRANSPORT_ERROR;
 229
 230         /* DATA STAGE */
 231         /* send/receive data payload, if there is any */
 232
 233         if (buf && buf_len) {
 234                 unsigned int pipe = (dir == DMA_FROM_DEVICE) ?
 235                     us->recv_bulk_pipe : us->send_bulk_pipe;
 236                 result = usb_stor_bulk_transfer_buf(us, pipe,
 237                                                     buf, buf_len, NULL);
 238                 if (result == USB_STOR_XFER_ERROR)
 239                         return USB_STOR_TRANSPORT_ERROR;
 240         }
 241
 242         /* get CSW for device status */
 243         result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
 244                                             bcs, US_BULK_CS_WRAP_LEN, &cswlen);
 245         if (result != USB_STOR_XFER_GOOD)
 246                 return USB_STOR_TRANSPORT_ERROR;
 247
 248         /* check bulk status */
 249         if (bcs->Signature != cpu_to_le32(US_BULK_CS_SIGN)) {
 250                 usb_stor_dbg(us, "Signature mismatch: got %08X, expecting %08X\n",
 251                              le32_to_cpu(bcs->Signature), US_BULK_CS_SIGN);
 252                 return USB_STOR_TRANSPORT_ERROR;
 253         }
 254
 255         residue = bcs->Residue;
 256         if (bcs->Tag != us->tag)
 257                 return USB_STOR_TRANSPORT_ERROR;
 258
 259         /*
 260          * try to compute the actual residue, based on how much data
 261          * was really transferred and what the device tells us
 262          */
 263         if (residue)
 264                 residue = residue < buf_len ? residue : buf_len;
 265
 266         if (act_len)
 267                 *act_len = buf_len - residue;
 268
 269         /* based on the status code, we report good or bad */
 270         switch (bcs->Status) {
 271         case US_BULK_STAT_OK:
 272                 /* command good -- note that data could be short */
 273                 return USB_STOR_TRANSPORT_GOOD;
 274
 275         case US_BULK_STAT_FAIL:
 276                 /* command failed */
 277                 return USB_STOR_TRANSPORT_FAILED;
 278
 279         case US_BULK_STAT_PHASE:
 280                 /*
 281                  * phase error -- note that a transport reset will be
 282                  * invoked by the invoke_transport() function
 283                  */
 284                 return USB_STOR_TRANSPORT_ERROR;
 285         }
 286
 287         /* we should never get here, but if we do, we're in trouble */
 288         return USB_STOR_TRANSPORT_ERROR;
 289 }
 290
 291 static int rts51x_bulk_transport_special(struct us_data *us, u8 lun,
 292                                  u8 *cmd, int cmd_len, u8 *buf, int buf_len,
 293                                  enum dma_data_direction dir, int *act_len)
 294 {
 295         struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
 296         struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;
 297         int result;
 298         unsigned int cswlen;
 299         unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
 300
 301         /* set up the command wrapper */
 302         bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 303         bcb->DataTransferLength = cpu_to_le32(buf_len);
 304         bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : 0;
 305         bcb->Tag = ++us->tag;
 306         bcb->Lun = lun;
 307         bcb->Length = cmd_len;
 308
 309         /* copy the command payload */
 310         memset(bcb->CDB, 0, sizeof(bcb->CDB));
 311         memcpy(bcb->CDB, cmd, bcb->Length);
 312
 313         /* send it to out endpoint */
 314         result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
 315                                 bcb, cbwlen, NULL);
 316         if (result != USB_STOR_XFER_GOOD)
 317                 return USB_STOR_TRANSPORT_ERROR;
 318
 319         /* DATA STAGE */
 320         /* send/receive data payload, if there is any */
 321
 322         if (buf && buf_len) {
 323                 unsigned int pipe = (dir == DMA_FROM_DEVICE) ?
 324                                 us->recv_bulk_pipe : us->send_bulk_pipe;
 325                 result = usb_stor_bulk_transfer_buf(us, pipe,
 326                                 buf, buf_len, NULL);
 327                 if (result == USB_STOR_XFER_ERROR)
 328                         return USB_STOR_TRANSPORT_ERROR;
 329         }
 330
 331         /* get CSW for device status */
 332         result = usb_bulk_msg(us->pusb_dev, us->recv_bulk_pipe, bcs,
 333                         US_BULK_CS_WRAP_LEN, &cswlen, 250);
 334         return result;
 335 }
 336
 337 /* Determine what the maximum LUN supported is */
 338 static int rts51x_get_max_lun(struct us_data *us)
 339 {
 340         int result;
 341
 342         /* issue the command */
 343         us->iobuf[0] = 0;
 344         result = usb_stor_control_msg(us, us->recv_ctrl_pipe,
 345                                       US_BULK_GET_MAX_LUN,
 346                                       USB_DIR_IN | USB_TYPE_CLASS |
 347                                       USB_RECIP_INTERFACE,
 348                                       0, us->ifnum, us->iobuf, 1, 10 * HZ);
 349
 350         usb_stor_dbg(us, "GetMaxLUN command result is %d, data is %d\n",
 351                      result, us->iobuf[0]);
 352
 353         /* if we have a successful request, return the result */
 354         if (result > 0)
 355                 return us->iobuf[0];
 356
 357         return 0;
 358 }
 359
 360 static int rts51x_read_mem(struct us_data *us, u16 addr, u8 *data, u16 len)
 361 {
 362         int retval;
 363         u8 cmnd[12] = { 0 };
 364         u8 *buf;
 365
 366         buf = kmalloc(len, GFP_NOIO);
 367         if (buf == NULL)
 368                 return USB_STOR_TRANSPORT_ERROR;
 369
 370         usb_stor_dbg(us, "addr = 0x%x, len = %d\n", addr, len);
 371
 372         cmnd[0] = 0xF0;
 373         cmnd[1] = 0x0D;
 374         cmnd[2] = (u8) (addr >> 8);
 375         cmnd[3] = (u8) addr;
 376         cmnd[4] = (u8) (len >> 8);
 377         cmnd[5] = (u8) len;
 378
 379         retval = rts51x_bulk_transport(us, 0, cmnd, 12,
 380                                        buf, len, DMA_FROM_DEVICE, NULL);
 381         if (retval != USB_STOR_TRANSPORT_GOOD) {
 382                 kfree(buf);
 383                 return -EIO;
 384         }
 385
 386         memcpy(data, buf, len);
 387         kfree(buf);
 388         return 0;
 389 }
 390
 391 static int rts51x_write_mem(struct us_data *us, u16 addr, u8 *data, u16 len)
 392 {
 393         int retval;
 394         u8 cmnd[12] = { 0 };
 395         u8 *buf;
 396
 397         buf = kmemdup(data, len, GFP_NOIO);
 398         if (buf == NULL)
 399                 return USB_STOR_TRANSPORT_ERROR;
 400
 401         usb_stor_dbg(us, "addr = 0x%x, len = %d\n", addr, len);
 402
 403         cmnd[0] = 0xF0;
 404         cmnd[1] = 0x0E;
 405         cmnd[2] = (u8) (addr >> 8);
 406         cmnd[3] = (u8) addr;
 407         cmnd[4] = (u8) (len >> 8);
 408         cmnd[5] = (u8) len;
 409
 410         retval = rts51x_bulk_transport(us, 0, cmnd, 12,
 411                                        buf, len, DMA_TO_DEVICE, NULL);
 412         kfree(buf);
 413         if (retval != USB_STOR_TRANSPORT_GOOD)
 414                 return -EIO;
 415
 416         return 0;
 417 }
 418
 419 static int rts51x_read_status(struct us_data *us,
 420                               u8 lun, u8 *status, int len, int *actlen)
 421 {
 422         int retval;
 423         u8 cmnd[12] = { 0 };
 424         u8 *buf;
 425
 426         buf = kmalloc(len, GFP_NOIO);
 427         if (buf == NULL)
 428                 return USB_STOR_TRANSPORT_ERROR;
 429
 430         usb_stor_dbg(us, "lun = %d\n", lun);
 431
 432         cmnd[0] = 0xF0;
 433         cmnd[1] = 0x09;
 434
 435         retval = rts51x_bulk_transport(us, lun, cmnd, 12,
 436                                        buf, len, DMA_FROM_DEVICE, actlen);
 437         if (retval != USB_STOR_TRANSPORT_GOOD) {
 438                 kfree(buf);
 439                 return -EIO;
 440         }
 441
 442         memcpy(status, buf, len);
 443         kfree(buf);
 444         return 0;
 445 }
 446
 447 static int rts51x_check_status(struct us_data *us, u8 lun)
 448 {
 449         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 450         int retval;
 451         u8 buf[16];
 452
 453         retval = rts51x_read_status(us, lun, buf, 16, &(chip->status_len));
 454         if (retval != STATUS_SUCCESS)
 455                 return -EIO;
 456
 457         usb_stor_dbg(us, "chip->status_len = %d\n", chip->status_len);
 458
 459         chip->status[lun].vid = ((u16) buf[0] << 8) | buf[1];
 460         chip->status[lun].pid = ((u16) buf[2] << 8) | buf[3];
 461         chip->status[lun].cur_lun = buf[4];
 462         chip->status[lun].card_type = buf[5];
 463         chip->status[lun].total_lun = buf[6];
 464         chip->status[lun].fw_ver = ((u16) buf[7] << 8) | buf[8];
 465         chip->status[lun].phy_exist = buf[9];
 466         chip->status[lun].multi_flag = buf[10];
 467         chip->status[lun].multi_card = buf[11];
 468         chip->status[lun].log_exist = buf[12];
 469         if (chip->status_len == 16) {
 470                 chip->status[lun].detailed_type.detailed_type1 = buf[13];
 471                 chip->status[lun].function[0] = buf[14];
 472                 chip->status[lun].function[1] = buf[15];
 473         }
 474
 475         return 0;
 476 }
 477
 478 static int enable_oscillator(struct us_data *us)
 479 {
 480         int retval;
 481         u8 value;
 482
 483         retval = rts51x_read_mem(us, 0xFE77, &value, 1);
 484         if (retval < 0)
 485                 return -EIO;
 486
 487         value |= 0x04;
 488         retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 489         if (retval < 0)
 490                 return -EIO;
 491
 492         retval = rts51x_read_mem(us, 0xFE77, &value, 1);
 493         if (retval < 0)
 494                 return -EIO;
 495
 496         if (!(value & 0x04))
 497                 return -EIO;
 498
 499         return 0;
 500 }
 501
 502 static int __do_config_autodelink(struct us_data *us, u8 *data, u16 len)
 503 {
 504         int retval;
 505         u8 cmnd[12] = {0};
 506         u8 *buf;
 507
 508         usb_stor_dbg(us, "addr = 0xfe47, len = %d\n", len);
 509
 510         buf = kmemdup(data, len, GFP_NOIO);
 511         if (!buf)
 512                 return USB_STOR_TRANSPORT_ERROR;
 513
 514         cmnd[0] = 0xF0;
 515         cmnd[1] = 0x0E;
 516         cmnd[2] = 0xfe;
 517         cmnd[3] = 0x47;
 518         cmnd[4] = (u8)(len >> 8);
 519         cmnd[5] = (u8)len;
 520
 521         retval = rts51x_bulk_transport_special(us, 0, cmnd, 12, buf, len, DMA_TO_DEVICE, NULL);
 522         kfree(buf);
 523         if (retval != USB_STOR_TRANSPORT_GOOD) {
 524                 return -EIO;
 525         }
 526
 527         return 0;
 528 }
 529
 530 static int do_config_autodelink(struct us_data *us, int enable, int force)
 531 {
 532         int retval;
 533         u8 value;
 534
 535         retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 536         if (retval < 0)
 537                 return -EIO;
 538
 539         if (enable) {
 540                 if (force)
 541                         value |= 0x03;
 542                 else
 543                         value |= 0x01;
 544         } else {
 545                 value &= ~0x03;
 546         }
 547
 548         usb_stor_dbg(us, "set 0xfe47 to 0x%x\n", value);
 549
 550         /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 551         retval = __do_config_autodelink(us, &value, 1);
 552         if (retval < 0)
 553                 return -EIO;
 554
 555         return 0;
 556 }
 557
 558 static int config_autodelink_after_power_on(struct us_data *us)
 559 {
 560         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 561         int retval;
 562         u8 value;
 563
 564         if (!CHK_AUTO_DELINK(chip))
 565                 return 0;
 566
 567         retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 568         if (retval < 0)
 569                 return -EIO;
 570
 571         if (auto_delink_en) {
 572                 CLR_BIT(value, 0);
 573                 CLR_BIT(value, 1);
 574                 SET_BIT(value, 2);
 575
 576                 if (CHECK_ID(chip, 0x0138, 0x3882))
 577                         CLR_BIT(value, 2);
 578
 579                 SET_BIT(value, 7);
 580
 581                 /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 582                 retval = __do_config_autodelink(us, &value, 1);
 583                 if (retval < 0)
 584                         return -EIO;
 585
 586                 retval = enable_oscillator(us);
 587                 if (retval == 0)
 588                         (void)do_config_autodelink(us, 1, 0);
 589         } else {
 590                 /* Autodelink controlled by firmware */
 591
 592                 SET_BIT(value, 2);
 593
 594                 if (CHECK_ID(chip, 0x0138, 0x3882))
 595                         CLR_BIT(value, 2);
 596
 597                 if (CHECK_ID(chip, 0x0159, 0x5889) ||
 598                     CHECK_ID(chip, 0x0138, 0x3880)) {
 599                         CLR_BIT(value, 0);
 600                         CLR_BIT(value, 7);
 601                 }
 602
 603                 /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 604                 retval = __do_config_autodelink(us, &value, 1);
 605                 if (retval < 0)
 606                         return -EIO;
 607
 608                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 609                         value = 0xFF;
 610                         retval = rts51x_write_mem(us, 0xFE79, &value, 1);
 611                         if (retval < 0)
 612                                 return -EIO;
 613
 614                         value = 0x01;
 615                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 616                         if (retval < 0)
 617                                 return -EIO;
 618                 }
 619         }
 620
 621         return 0;
 622 }
 623
 624 #ifdef CONFIG_PM
 625 static int config_autodelink_before_power_down(struct us_data *us)
 626 {
 627         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 628         int retval;
 629         u8 value;
 630
 631         if (!CHK_AUTO_DELINK(chip))
 632                 return 0;
 633
 634         if (auto_delink_en) {
 635                 retval = rts51x_read_mem(us, 0xFE77, &value, 1);
 636                 if (retval < 0)
 637                         return -EIO;
 638
 639                 SET_BIT(value, 2);
 640                 retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 641                 if (retval < 0)
 642                         return -EIO;
 643
 644                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 645                         value = 0x01;
 646                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 647                         if (retval < 0)
 648                                 return -EIO;
 649                 }
 650
 651                 retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 652                 if (retval < 0)
 653                         return -EIO;
 654
 655                 SET_BIT(value, 0);
 656                 if (CHECK_ID(chip, 0x0138, 0x3882))
 657                         SET_BIT(value, 2);
 658                 retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 659                 if (retval < 0)
 660                         return -EIO;
 661         } else {
 662                 if (CHECK_ID(chip, 0x0159, 0x5889) ||
 663                     CHECK_ID(chip, 0x0138, 0x3880) ||
 664                     CHECK_ID(chip, 0x0138, 0x3882)) {
 665                         retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 666                         if (retval < 0)
 667                                 return -EIO;
 668
 669                         if (CHECK_ID(chip, 0x0159, 0x5889) ||
 670                             CHECK_ID(chip, 0x0138, 0x3880)) {
 671                                 SET_BIT(value, 0);
 672                                 SET_BIT(value, 7);
 673                         }
 674
 675                         if (CHECK_ID(chip, 0x0138, 0x3882))
 676                                 SET_BIT(value, 2);
 677
 678                         /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 679                         retval = __do_config_autodelink(us, &value, 1);
 680                         if (retval < 0)
 681                                 return -EIO;
 682                 }
 683
 684                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 685                         value = 0x01;
 686                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 687                         if (retval < 0)
 688                                 return -EIO;
 689                 }
 690         }
 691
 692         return 0;
 693 }
 694
 695 static void fw5895_init(struct us_data *us)
 696 {
 697         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 698         int retval;
 699         u8 val;
 700
 701         if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
 702                 usb_stor_dbg(us, "Not the specified device, return immediately!\n");
 703         } else {
 704                 retval = rts51x_read_mem(us, 0xFD6F, &val, 1);
 705                 if (retval == STATUS_SUCCESS && (val & 0x1F) == 0) {
 706                         val = 0x1F;
 707                         retval = rts51x_write_mem(us, 0xFD70, &val, 1);
 708                         if (retval != STATUS_SUCCESS)
 709                                 usb_stor_dbg(us, "Write memory fail\n");
 710                 } else {
 711                         usb_stor_dbg(us, "Read memory fail, OR (val & 0x1F) != 0\n");
 712                 }
 713         }
 714 }
 715 #endif
 716
 717 #ifdef CONFIG_REALTEK_AUTOPM
 718 static void fw5895_set_mmc_wp(struct us_data *us)
 719 {
 720         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 721         int retval;
 722         u8 buf[13];
 723
 724         if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
 725                 usb_stor_dbg(us, "Not the specified device, return immediately!\n");
 726         } else {
 727                 retval = rts51x_read_mem(us, 0xFD6F, buf, 1);
 728                 if (retval == STATUS_SUCCESS && (buf[0] & 0x24) == 0x24) {
 729                         /* SD Exist and SD WP */
 730                         retval = rts51x_read_mem(us, 0xD04E, buf, 1);
 731                         if (retval == STATUS_SUCCESS) {
 732                                 buf[0] |= 0x04;
 733                                 retval = rts51x_write_mem(us, 0xFD70, buf, 1);
 734                                 if (retval != STATUS_SUCCESS)
 735                                         usb_stor_dbg(us, "Write memory fail\n");
 736                         } else {
 737                                 usb_stor_dbg(us, "Read memory fail\n");
 738                         }
 739                 } else {
 740                         usb_stor_dbg(us, "Read memory fail, OR (buf[0]&0x24)!=0x24\n");
 741                 }
 742         }
 743 }
 744
 745 static void rts51x_modi_suspend_timer(struct rts51x_chip *chip)
 746 {
 747         struct us_data *us = chip->us;
 748
 749         usb_stor_dbg(us, "state:%d\n", rts51x_get_stat(chip));
 750
 751         chip->timer_expires = jiffies + msecs_to_jiffies(1000*ss_delay);
 752         mod_timer(&chip->rts51x_suspend_timer, chip->timer_expires);
 753 }
 754
 755 static void rts51x_suspend_timer_fn(struct timer_list *t)
 756 {
 757         struct rts51x_chip *chip = from_timer(chip, t, rts51x_suspend_timer);
 758         struct us_data *us = chip->us;
 759
 760         switch (rts51x_get_stat(chip)) {
 761         case RTS51X_STAT_INIT:
 762         case RTS51X_STAT_RUN:
 763                 rts51x_modi_suspend_timer(chip);
 764                 break;
 765         case RTS51X_STAT_IDLE:
 766         case RTS51X_STAT_SS:
 767                 usb_stor_dbg(us, "RTS51X_STAT_SS, power.usage:%d\n",
 768                              atomic_read(&us->pusb_intf->dev.power.usage_count));
 769
 770                 if (atomic_read(&us->pusb_intf->dev.power.usage_count) > 0) {
 771                         usb_stor_dbg(us, "Ready to enter SS state\n");
 772                         rts51x_set_stat(chip, RTS51X_STAT_SS);
 773                         /* ignore mass storage interface's children */
 774                         pm_suspend_ignore_children(&us->pusb_intf->dev, true);
 775                         usb_autopm_put_interface_async(us->pusb_intf);
 776                         usb_stor_dbg(us, "RTS51X_STAT_SS 01, power.usage:%d\n",
 777                                      atomic_read(&us->pusb_intf->dev.power.usage_count));
 778                 }
 779                 break;
 780         default:
 781                 usb_stor_dbg(us, "Unknown state !!!\n");
 782                 break;
 783         }
 784 }
 785
 786 static inline int working_scsi(struct scsi_cmnd *srb)
 787 {
 788         if ((srb->cmnd[0] == TEST_UNIT_READY) ||
 789             (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL)) {
 790                 return 0;
 791         }
 792
 793         return 1;
 794 }
 795
 796 static void rts51x_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
 797 {
 798         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 799         static int card_first_show = 1;
 800         static u8 media_not_present[] = { 0x70, 0, 0x02, 0, 0, 0, 0,
 801                 10, 0, 0, 0, 0, 0x3A, 0, 0, 0, 0, 0
 802         };
 803         static u8 invalid_cmd_field[] = { 0x70, 0, 0x05, 0, 0, 0, 0,
 804                 10, 0, 0, 0, 0, 0x24, 0, 0, 0, 0, 0
 805         };
 806         int ret;
 807
 808         if (working_scsi(srb)) {
 809                 usb_stor_dbg(us, "working scsi, power.usage:%d\n",
 810                              atomic_read(&us->pusb_intf->dev.power.usage_count));
 811
 812                 if (atomic_read(&us->pusb_intf->dev.power.usage_count) <= 0) {
 813                         ret = usb_autopm_get_interface(us->pusb_intf);
 814                         usb_stor_dbg(us, "working scsi, ret=%d\n", ret);
 815                 }
 816                 if (rts51x_get_stat(chip) != RTS51X_STAT_RUN)
 817                         rts51x_set_stat(chip, RTS51X_STAT_RUN);
 818                 chip->proto_handler_backup(srb, us);
 819         } else {
 820                 if (rts51x_get_stat(chip) == RTS51X_STAT_SS) {
 821                         usb_stor_dbg(us, "NOT working scsi\n");
 822                         if ((srb->cmnd[0] == TEST_UNIT_READY) &&
 823                             (chip->pwr_state == US_SUSPEND)) {
 824                                 if (TST_LUN_READY(chip, srb->device->lun)) {
 825                                         srb->result = SAM_STAT_GOOD;
 826                                 } else {
 827                                         srb->result = SAM_STAT_CHECK_CONDITION;
 828                                         memcpy(srb->sense_buffer,
 829                                                media_not_present,
 830                                                US_SENSE_SIZE);
 831                                 }
 832                                 usb_stor_dbg(us, "TEST_UNIT_READY\n");
 833                                 goto out;
 834                         }
 835                         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
 836                                 int prevent = srb->cmnd[4] & 0x1;
 837                                 if (prevent) {
 838                                         srb->result = SAM_STAT_CHECK_CONDITION;
 839                                         memcpy(srb->sense_buffer,
 840                                                invalid_cmd_field,
 841                                                US_SENSE_SIZE);
 842                                 } else {
 843                                         srb->result = SAM_STAT_GOOD;
 844                                 }
 845                                 usb_stor_dbg(us, "ALLOW_MEDIUM_REMOVAL\n");
 846                                 goto out;
 847                         }
 848                 } else {
 849                         usb_stor_dbg(us, "NOT working scsi, not SS\n");
 850                         chip->proto_handler_backup(srb, us);
 851                         /* Check whether card is plugged in */
 852                         if (srb->cmnd[0] == TEST_UNIT_READY) {
 853                                 if (srb->result == SAM_STAT_GOOD) {
 854                                         SET_LUN_READY(chip, srb->device->lun);
 855                                         if (card_first_show) {
 856                                                 card_first_show = 0;
 857                                                 fw5895_set_mmc_wp(us);
 858                                         }
 859                                 } else {
 860                                         CLR_LUN_READY(chip, srb->device->lun);
 861                                         card_first_show = 1;
 862                                 }
 863                         }
 864                         if (rts51x_get_stat(chip) != RTS51X_STAT_IDLE)
 865                                 rts51x_set_stat(chip, RTS51X_STAT_IDLE);
 866                 }
 867         }
 868 out:
 869         usb_stor_dbg(us, "state:%d\n", rts51x_get_stat(chip));
 870         if (rts51x_get_stat(chip) == RTS51X_STAT_RUN)
 871                 rts51x_modi_suspend_timer(chip);
 872 }
 873
 874 static int realtek_cr_autosuspend_setup(struct us_data *us)
 875 {
 876         struct rts51x_chip *chip;
 877         struct rts51x_status *status = NULL;
 878         u8 buf[16];
 879         int retval;
 880
 881         chip = (struct rts51x_chip *)us->extra;
 882         chip->support_auto_delink = 0;
 883         chip->pwr_state = US_RESUME;
 884         chip->lun_ready = 0;
 885         rts51x_set_stat(chip, RTS51X_STAT_INIT);
 886
 887         retval = rts51x_read_status(us, 0, buf, 16, &(chip->status_len));
 888         if (retval != STATUS_SUCCESS) {
 889                 usb_stor_dbg(us, "Read status fail\n");
 890                 return -EIO;
 891         }
 892         status = chip->status;
 893         status->vid = ((u16) buf[0] << 8) | buf[1];
 894         status->pid = ((u16) buf[2] << 8) | buf[3];
 895         status->cur_lun = buf[4];
 896         status->card_type = buf[5];
 897         status->total_lun = buf[6];
 898         status->fw_ver = ((u16) buf[7] << 8) | buf[8];
 899         status->phy_exist = buf[9];
 900         status->multi_flag = buf[10];
 901         status->multi_card = buf[11];
 902         status->log_exist = buf[12];
 903         if (chip->status_len == 16) {
 904                 status->detailed_type.detailed_type1 = buf[13];
 905                 status->function[0] = buf[14];
 906                 status->function[1] = buf[15];
 907         }
 908
 909         /* back up the proto_handler in us->extra */
 910         chip = (struct rts51x_chip *)(us->extra);
 911         chip->proto_handler_backup = us->proto_handler;
 912         /* Set the autosuspend_delay to 0 */
 913         pm_runtime_set_autosuspend_delay(&us->pusb_dev->dev, 0);
 914         /* override us->proto_handler setted in get_protocol() */
 915         us->proto_handler = rts51x_invoke_transport;
 916
 917         chip->timer_expires = 0;
 918         timer_setup(&chip->rts51x_suspend_timer, rts51x_suspend_timer_fn, 0);
 919         fw5895_init(us);
 920
 921         /* enable autosuspend function of the usb device */
 922         usb_enable_autosuspend(us->pusb_dev);
 923
 924         return 0;
 925 }
 926 #endif
 927
 928 static void realtek_cr_destructor(void *extra)
 929 {
 930         struct rts51x_chip *chip = extra;
 931
 932         if (!chip)
 933                 return;
 934
 935 #ifdef CONFIG_REALTEK_AUTOPM
 936         if (ss_en) {
 937                 del_timer(&chip->rts51x_suspend_timer);
 938                 chip->timer_expires = 0;
 939         }
 940 #endif
 941         kfree(chip->status);
 942 }
 943
 944 #ifdef CONFIG_PM
 945 static int realtek_cr_suspend(struct usb_interface *iface, pm_message_t message)
 946 {
 947         struct us_data *us = usb_get_intfdata(iface);
 948
 949         /* wait until no command is running */
 950         mutex_lock(&us->dev_mutex);
 951
 952         config_autodelink_before_power_down(us);
 953
 954         mutex_unlock(&us->dev_mutex);
 955
 956         return 0;
 957 }
 958
 959 static int realtek_cr_resume(struct usb_interface *iface)
 960 {
 961         struct us_data *us = usb_get_intfdata(iface);
 962
 963         fw5895_init(us);
 964         config_autodelink_after_power_on(us);
 965
 966         return 0;
 967 }
 968 #else
 969 #define realtek_cr_suspend      NULL
 970 #define realtek_cr_resume       NULL
 971 #endif
 972
 973 static int init_realtek_cr(struct us_data *us)
 974 {
 975         struct rts51x_chip *chip;
 976         int size, i, retval;
 977
 978         chip = kzalloc(sizeof(struct rts51x_chip), GFP_KERNEL);
 979         if (!chip)
 980                 return -ENOMEM;
 981
 982         us->extra = chip;
 983         us->extra_destructor = realtek_cr_destructor;
 984         us->max_lun = chip->max_lun = rts51x_get_max_lun(us);
 985         chip->us = us;
 986
 987         usb_stor_dbg(us, "chip->max_lun = %d\n", chip->max_lun);
 988
 989         size = (chip->max_lun + 1) * sizeof(struct rts51x_status);
 990         chip->status = kzalloc(size, GFP_KERNEL);
 991         if (!chip->status)
 992                 goto INIT_FAIL;
 993
 994         for (i = 0; i <= (int)(chip->max_lun); i++) {
 995                 retval = rts51x_check_status(us, (u8) i);
 996                 if (retval < 0)
 997                         goto INIT_FAIL;
 998         }
 999
1000         if (CHECK_PID(chip, 0x0138) || CHECK_PID(chip, 0x0158) ||
1001             CHECK_PID(chip, 0x0159)) {
1002                 if (CHECK_FW_VER(chip, 0x5888) || CHECK_FW_VER(chip, 0x5889) ||
1003                                 CHECK_FW_VER(chip, 0x5901))
1004                         SET_AUTO_DELINK(chip);
1005                 if (STATUS_LEN(chip) == 16) {
1006                         if (SUPPORT_AUTO_DELINK(chip))
1007                                 SET_AUTO_DELINK(chip);
1008                 }
1009         }
1010 #ifdef CONFIG_REALTEK_AUTOPM
1011         if (ss_en)
1012                 realtek_cr_autosuspend_setup(us);
1013 #endif
1014
1015         usb_stor_dbg(us, "chip->flag = 0x%x\n", chip->flag);
1016
1017         (void)config_autodelink_after_power_on(us);
1018
1019         return 0;
1020
1021 INIT_FAIL:
1022         if (us->extra) {
1023                 kfree(chip->status);
1024                 kfree(us->extra);
1025                 us->extra = NULL;
1026         }
1027
1028         return -EIO;
1029 }
1030
1031 static struct scsi_host_template realtek_cr_host_template;
1032
1033 static int realtek_cr_probe(struct usb_interface *intf,
1034                             const struct usb_device_id *id)
1035 {
1036         struct us_data *us;
1037         int result;
1038
1039         dev_dbg(&intf->dev, "Probe Realtek Card Reader!\n");
1040
1041         result = usb_stor_probe1(&us, intf, id,
1042                                  (id - realtek_cr_ids) +
1043                                  realtek_cr_unusual_dev_list,
1044                                  &realtek_cr_host_template);
1045         if (result)
1046                 return result;
1047
1048         result = usb_stor_probe2(us);
1049
1050         return result;
1051 }
1052
1053 static struct usb_driver realtek_cr_driver = {
1054         .name = DRV_NAME,
1055         .probe = realtek_cr_probe,
1056         .disconnect = usb_stor_disconnect,
1057         /* .suspend =      usb_stor_suspend, */
1058         /* .resume =       usb_stor_resume, */
1059         .reset_resume = usb_stor_reset_resume,
1060         .suspend = realtek_cr_suspend,
1061         .resume = realtek_cr_resume,
1062         .pre_reset = usb_stor_pre_reset,
1063         .post_reset = usb_stor_post_reset,
1064         .id_table = realtek_cr_ids,
1065         .soft_unbind = 1,
1066         .supports_autosuspend = 1,
1067         .no_dynamic_id = 1,
1068 };
1069
1070 module_usb_stor_driver(realtek_cr_driver, realtek_cr_host_template, DRV_NAME);