drivers/usb/storage/realtek_cr.c

   1 /* Driver for Realtek RTS51xx USB card reader
   2  *
   3  * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2, or (at your option) any
   8  * later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * Author:
  19  *   wwang (wei_wang@realsil.com.cn)
  20  *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/blkdev.h>
  25 #include <linux/kthread.h>
  26 #include <linux/sched.h>
  27 #include <linux/kernel.h>
  28
  29 #include <scsi/scsi.h>
  30 #include <scsi/scsi_cmnd.h>
  31 #include <scsi/scsi_device.h>
  32 #include <linux/cdrom.h>
  33
  34 #include <linux/usb.h>
  35 #include <linux/slab.h>
  36 #include <linux/usb_usual.h>
  37
  38 #include "usb.h"
  39 #include "transport.h"
  40 #include "protocol.h"
  41 #include "debug.h"
  42
  43 MODULE_DESCRIPTION("Driver for Realtek USB Card Reader");
  44 MODULE_AUTHOR("wwang <wei_wang@realsil.com.cn>");
  45 MODULE_LICENSE("GPL");
  46 MODULE_VERSION("1.03");
  47
  48 static int auto_delink_en = 1;
  49 module_param(auto_delink_en, int, S_IRUGO | S_IWUSR);
  50 MODULE_PARM_DESC(auto_delink_en, "enable auto delink");
  51
  52 #ifdef CONFIG_REALTEK_AUTOPM
  53 static int ss_en = 1;
  54 module_param(ss_en, int, S_IRUGO | S_IWUSR);
  55 MODULE_PARM_DESC(ss_en, "enable selective suspend");
  56
  57 static int ss_delay = 50;
  58 module_param(ss_delay, int, S_IRUGO | S_IWUSR);
  59 MODULE_PARM_DESC(ss_delay,
  60                  "seconds to delay before entering selective suspend");
  61
  62 enum RTS51X_STAT {
  63         RTS51X_STAT_INIT,
  64         RTS51X_STAT_IDLE,
  65         RTS51X_STAT_RUN,
  66         RTS51X_STAT_SS
  67 };
  68
  69 #define POLLING_INTERVAL        50
  70
  71 #define rts51x_set_stat(chip, stat)     \
  72         ((chip)->state = (enum RTS51X_STAT)(stat))
  73 #define rts51x_get_stat(chip)           ((chip)->state)
  74
  75 #define SET_LUN_READY(chip, lun)        ((chip)->lun_ready |= ((u8)1 << (lun)))
  76 #define CLR_LUN_READY(chip, lun)        ((chip)->lun_ready &= ~((u8)1 << (lun)))
  77 #define TST_LUN_READY(chip, lun)        ((chip)->lun_ready & ((u8)1 << (lun)))
  78
  79 #endif
  80
  81 struct rts51x_status {
  82         u16 vid;
  83         u16 pid;
  84         u8 cur_lun;
  85         u8 card_type;
  86         u8 total_lun;
  87         u16 fw_ver;
  88         u8 phy_exist;
  89         u8 multi_flag;
  90         u8 multi_card;
  91         u8 log_exist;
  92         union {
  93                 u8 detailed_type1;
  94                 u8 detailed_type2;
  95         } detailed_type;
  96         u8 function[2];
  97 };
  98
  99 struct rts51x_chip {
 100         u16 vendor_id;
 101         u16 product_id;
 102         char max_lun;
 103
 104         struct rts51x_status *status;
 105         int status_len;
 106
 107         u32 flag;
 108 #ifdef CONFIG_REALTEK_AUTOPM
 109         struct us_data *us;
 110         struct timer_list rts51x_suspend_timer;
 111         unsigned long timer_expires;
 112         int pwr_state;
 113         u8 lun_ready;
 114         enum RTS51X_STAT state;
 115         int support_auto_delink;
 116 #endif
 117         /* used to back up the protocal choosen in probe1 phase */
 118         proto_cmnd proto_handler_backup;
 119 };
 120
 121 /* flag definition */
 122 #define FLIDX_AUTO_DELINK               0x01
 123
 124 #define SCSI_LUN(srb)                   ((srb)->device->lun)
 125
 126 /* Bit Operation */
 127 #define SET_BIT(data, idx)              ((data) |= 1 << (idx))
 128 #define CLR_BIT(data, idx)              ((data) &= ~(1 << (idx)))
 129 #define CHK_BIT(data, idx)              ((data) & (1 << (idx)))
 130
 131 #define SET_AUTO_DELINK(chip)           ((chip)->flag |= FLIDX_AUTO_DELINK)
 132 #define CLR_AUTO_DELINK(chip)           ((chip)->flag &= ~FLIDX_AUTO_DELINK)
 133 #define CHK_AUTO_DELINK(chip)           ((chip)->flag & FLIDX_AUTO_DELINK)
 134
 135 #define RTS51X_GET_VID(chip)            ((chip)->vendor_id)
 136 #define RTS51X_GET_PID(chip)            ((chip)->product_id)
 137
 138 #define VENDOR_ID(chip)                 ((chip)->status[0].vid)
 139 #define PRODUCT_ID(chip)                ((chip)->status[0].pid)
 140 #define FW_VERSION(chip)                ((chip)->status[0].fw_ver)
 141 #define STATUS_LEN(chip)                ((chip)->status_len)
 142
 143 #define STATUS_SUCCESS          0
 144 #define STATUS_FAIL             1
 145
 146 /* Check card reader function */
 147 #define SUPPORT_DETAILED_TYPE1(chip)    \
 148                 CHK_BIT((chip)->status[0].function[0], 1)
 149 #define SUPPORT_OT(chip)                \
 150                 CHK_BIT((chip)->status[0].function[0], 2)
 151 #define SUPPORT_OC(chip)                \
 152                 CHK_BIT((chip)->status[0].function[0], 3)
 153 #define SUPPORT_AUTO_DELINK(chip)       \
 154                 CHK_BIT((chip)->status[0].function[0], 4)
 155 #define SUPPORT_SDIO(chip)              \
 156                 CHK_BIT((chip)->status[0].function[1], 0)
 157 #define SUPPORT_DETAILED_TYPE2(chip)    \
 158                 CHK_BIT((chip)->status[0].function[1], 1)
 159
 160 #define CHECK_PID(chip, pid)            (RTS51X_GET_PID(chip) == (pid))
 161 #define CHECK_FW_VER(chip, fw_ver)      (FW_VERSION(chip) == (fw_ver))
 162 #define CHECK_ID(chip, pid, fw_ver)     \
 163                 (CHECK_PID((chip), (pid)) && CHECK_FW_VER((chip), (fw_ver)))
 164
 165 static int init_realtek_cr(struct us_data *us);
 166
 167 /*
 168  * The table of devices
 169  */
 170 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
 171                     vendorName, productName, useProtocol, useTransport, \
 172                     initFunction, flags) \
 173 {\
 174         USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
 175         .driver_info = (flags) \
 176 }
 177
 178 static const struct usb_device_id realtek_cr_ids[] = {
 179 #       include "unusual_realtek.h"
 180         {}                      /* Terminating entry */
 181 };
 182
 183 MODULE_DEVICE_TABLE(usb, realtek_cr_ids);
 184
 185 #undef UNUSUAL_DEV
 186
 187 /*
 188  * The flags table
 189  */
 190 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
 191                     vendor_name, product_name, use_protocol, use_transport, \
 192                     init_function, Flags) \
 193 { \
 194         .vendorName = vendor_name,      \
 195         .productName = product_name,    \
 196         .useProtocol = use_protocol,    \
 197         .useTransport = use_transport,  \
 198         .initFunction = init_function,  \
 199 }
 200
 201 static struct us_unusual_dev realtek_cr_unusual_dev_list[] = {
 202 #       include "unusual_realtek.h"
 203         {}                      /* Terminating entry */
 204 };
 205
 206 #undef UNUSUAL_DEV
 207
 208 static int rts51x_bulk_transport(struct us_data *us, u8 lun,
 209                                  u8 *cmd, int cmd_len, u8 *buf, int buf_len,
 210                                  enum dma_data_direction dir, int *act_len)
 211 {
 212         struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *)us->iobuf;
 213         struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *)us->iobuf;
 214         int result;
 215         unsigned int residue;
 216         unsigned int cswlen;
 217         unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
 218
 219         /* set up the command wrapper */
 220         bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 221         bcb->DataTransferLength = cpu_to_le32(buf_len);
 222         bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : 0;
 223         bcb->Tag = ++us->tag;
 224         bcb->Lun = lun;
 225         bcb->Length = cmd_len;
 226
 227         /* copy the command payload */
 228         memset(bcb->CDB, 0, sizeof(bcb->CDB));
 229         memcpy(bcb->CDB, cmd, bcb->Length);
 230
 231         /* send it to out endpoint */
 232         result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
 233                                             bcb, cbwlen, NULL);
 234         if (result != USB_STOR_XFER_GOOD)
 235                 return USB_STOR_TRANSPORT_ERROR;
 236
 237         /* DATA STAGE */
 238         /* send/receive data payload, if there is any */
 239
 240         if (buf && buf_len) {
 241                 unsigned int pipe = (dir == DMA_FROM_DEVICE) ?
 242                     us->recv_bulk_pipe : us->send_bulk_pipe;
 243                 result = usb_stor_bulk_transfer_buf(us, pipe,
 244                                                     buf, buf_len, NULL);
 245                 if (result == USB_STOR_XFER_ERROR)
 246                         return USB_STOR_TRANSPORT_ERROR;
 247         }
 248
 249         /* get CSW for device status */
 250         result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
 251                                             bcs, US_BULK_CS_WRAP_LEN, &cswlen);
 252         if (result != USB_STOR_XFER_GOOD)
 253                 return USB_STOR_TRANSPORT_ERROR;
 254
 255         /* check bulk status */
 256         if (bcs->Signature != cpu_to_le32(US_BULK_CS_SIGN)) {
 257                 US_DEBUGP("Signature mismatch: got %08X, expecting %08X\n",
 258                           le32_to_cpu(bcs->Signature), US_BULK_CS_SIGN);
 259                 return USB_STOR_TRANSPORT_ERROR;
 260         }
 261
 262         residue = bcs->Residue;
 263         if (bcs->Tag != us->tag)
 264                 return USB_STOR_TRANSPORT_ERROR;
 265
 266         /* try to compute the actual residue, based on how much data
 267          * was really transferred and what the device tells us */
 268         if (residue)
 269                 residue = residue < buf_len ? residue : buf_len;
 270
 271         if (act_len)
 272                 *act_len = buf_len - residue;
 273
 274         /* based on the status code, we report good or bad */
 275         switch (bcs->Status) {
 276         case US_BULK_STAT_OK:
 277                 /* command good -- note that data could be short */
 278                 return USB_STOR_TRANSPORT_GOOD;
 279
 280         case US_BULK_STAT_FAIL:
 281                 /* command failed */
 282                 return USB_STOR_TRANSPORT_FAILED;
 283
 284         case US_BULK_STAT_PHASE:
 285                 /* phase error -- note that a transport reset will be
 286                  * invoked by the invoke_transport() function
 287                  */
 288                 return USB_STOR_TRANSPORT_ERROR;
 289         }
 290
 291         /* we should never get here, but if we do, we're in trouble */
 292         return USB_STOR_TRANSPORT_ERROR;
 293 }
 294
 295 static int rts51x_bulk_transport_special(struct us_data *us, u8 lun,
 296                                  u8 *cmd, int cmd_len, u8 *buf, int buf_len,
 297                                  enum dma_data_direction dir, int *act_len)
 298 {
 299         struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
 300         struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;
 301         int result;
 302         unsigned int cswlen;
 303         unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
 304
 305         /* set up the command wrapper */
 306         bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 307         bcb->DataTransferLength = cpu_to_le32(buf_len);
 308         bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : 0;
 309         bcb->Tag = ++us->tag;
 310         bcb->Lun = lun;
 311         bcb->Length = cmd_len;
 312
 313         /* copy the command payload */
 314         memset(bcb->CDB, 0, sizeof(bcb->CDB));
 315         memcpy(bcb->CDB, cmd, bcb->Length);
 316
 317         /* send it to out endpoint */
 318         result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
 319                                 bcb, cbwlen, NULL);
 320         if (result != USB_STOR_XFER_GOOD)
 321                 return USB_STOR_TRANSPORT_ERROR;
 322
 323         /* DATA STAGE */
 324         /* send/receive data payload, if there is any */
 325
 326         if (buf && buf_len) {
 327                 unsigned int pipe = (dir == DMA_FROM_DEVICE) ?
 328                                 us->recv_bulk_pipe : us->send_bulk_pipe;
 329                 result = usb_stor_bulk_transfer_buf(us, pipe,
 330                                 buf, buf_len, NULL);
 331                 if (result == USB_STOR_XFER_ERROR)
 332                         return USB_STOR_TRANSPORT_ERROR;
 333         }
 334
 335         /* get CSW for device status */
 336         result = usb_bulk_msg(us->pusb_dev, us->recv_bulk_pipe, bcs,
 337                         US_BULK_CS_WRAP_LEN, &cswlen, 250);
 338         return result;
 339 }
 340
 341 /* Determine what the maximum LUN supported is */
 342 static int rts51x_get_max_lun(struct us_data *us)
 343 {
 344         int result;
 345
 346         /* issue the command */
 347         us->iobuf[0] = 0;
 348         result = usb_stor_control_msg(us, us->recv_ctrl_pipe,
 349                                       US_BULK_GET_MAX_LUN,
 350                                       USB_DIR_IN | USB_TYPE_CLASS |
 351                                       USB_RECIP_INTERFACE,
 352                                       0, us->ifnum, us->iobuf, 1, 10 * HZ);
 353
 354         US_DEBUGP("GetMaxLUN command result is %d, data is %d\n",
 355                   result, us->iobuf[0]);
 356
 357         /* if we have a successful request, return the result */
 358         if (result > 0)
 359                 return us->iobuf[0];
 360
 361         return 0;
 362 }
 363
 364 static int rts51x_read_mem(struct us_data *us, u16 addr, u8 *data, u16 len)
 365 {
 366         int retval;
 367         u8 cmnd[12] = { 0 };
 368         u8 *buf;
 369
 370         buf = kmalloc(len, GFP_NOIO);
 371         if (buf == NULL)
 372                 return USB_STOR_TRANSPORT_ERROR;
 373
 374         US_DEBUGP("%s, addr = 0x%x, len = %d\n", __func__, addr, len);
 375
 376         cmnd[0] = 0xF0;
 377         cmnd[1] = 0x0D;
 378         cmnd[2] = (u8) (addr >> 8);
 379         cmnd[3] = (u8) addr;
 380         cmnd[4] = (u8) (len >> 8);
 381         cmnd[5] = (u8) len;
 382
 383         retval = rts51x_bulk_transport(us, 0, cmnd, 12,
 384                                        buf, len, DMA_FROM_DEVICE, NULL);
 385         if (retval != USB_STOR_TRANSPORT_GOOD) {
 386                 kfree(buf);
 387                 return -EIO;
 388         }
 389
 390         memcpy(data, buf, len);
 391         kfree(buf);
 392         return 0;
 393 }
 394
 395 static int rts51x_write_mem(struct us_data *us, u16 addr, u8 *data, u16 len)
 396 {
 397         int retval;
 398         u8 cmnd[12] = { 0 };
 399         u8 *buf;
 400
 401         buf = kmemdup(data, len, GFP_NOIO);
 402         if (buf == NULL)
 403                 return USB_STOR_TRANSPORT_ERROR;
 404
 405         US_DEBUGP("%s, addr = 0x%x, len = %d\n", __func__, addr, len);
 406
 407         cmnd[0] = 0xF0;
 408         cmnd[1] = 0x0E;
 409         cmnd[2] = (u8) (addr >> 8);
 410         cmnd[3] = (u8) addr;
 411         cmnd[4] = (u8) (len >> 8);
 412         cmnd[5] = (u8) len;
 413
 414         retval = rts51x_bulk_transport(us, 0, cmnd, 12,
 415                                        buf, len, DMA_TO_DEVICE, NULL);
 416         kfree(buf);
 417         if (retval != USB_STOR_TRANSPORT_GOOD)
 418                 return -EIO;
 419
 420         return 0;
 421 }
 422
 423 static int rts51x_read_status(struct us_data *us,
 424                               u8 lun, u8 *status, int len, int *actlen)
 425 {
 426         int retval;
 427         u8 cmnd[12] = { 0 };
 428         u8 *buf;
 429
 430         buf = kmalloc(len, GFP_NOIO);
 431         if (buf == NULL)
 432                 return USB_STOR_TRANSPORT_ERROR;
 433
 434         US_DEBUGP("%s, lun = %d\n", __func__, lun);
 435
 436         cmnd[0] = 0xF0;
 437         cmnd[1] = 0x09;
 438
 439         retval = rts51x_bulk_transport(us, lun, cmnd, 12,
 440                                        buf, len, DMA_FROM_DEVICE, actlen);
 441         if (retval != USB_STOR_TRANSPORT_GOOD) {
 442                 kfree(buf);
 443                 return -EIO;
 444         }
 445
 446         memcpy(status, buf, len);
 447         kfree(buf);
 448         return 0;
 449 }
 450
 451 static int rts51x_check_status(struct us_data *us, u8 lun)
 452 {
 453         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 454         int retval;
 455         u8 buf[16];
 456
 457         retval = rts51x_read_status(us, lun, buf, 16, &(chip->status_len));
 458         if (retval < 0)
 459                 return -EIO;
 460
 461         US_DEBUGP("chip->status_len = %d\n", chip->status_len);
 462
 463         chip->status[lun].vid = ((u16) buf[0] << 8) | buf[1];
 464         chip->status[lun].pid = ((u16) buf[2] << 8) | buf[3];
 465         chip->status[lun].cur_lun = buf[4];
 466         chip->status[lun].card_type = buf[5];
 467         chip->status[lun].total_lun = buf[6];
 468         chip->status[lun].fw_ver = ((u16) buf[7] << 8) | buf[8];
 469         chip->status[lun].phy_exist = buf[9];
 470         chip->status[lun].multi_flag = buf[10];
 471         chip->status[lun].multi_card = buf[11];
 472         chip->status[lun].log_exist = buf[12];
 473         if (chip->status_len == 16) {
 474                 chip->status[lun].detailed_type.detailed_type1 = buf[13];
 475                 chip->status[lun].function[0] = buf[14];
 476                 chip->status[lun].function[1] = buf[15];
 477         }
 478
 479         return 0;
 480 }
 481
 482 static int enable_oscillator(struct us_data *us)
 483 {
 484         int retval;
 485         u8 value;
 486
 487         retval = rts51x_read_mem(us, 0xFE77, &value, 1);
 488         if (retval < 0)
 489                 return -EIO;
 490
 491         value |= 0x04;
 492         retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 493         if (retval < 0)
 494                 return -EIO;
 495
 496         retval = rts51x_read_mem(us, 0xFE77, &value, 1);
 497         if (retval < 0)
 498                 return -EIO;
 499
 500         if (!(value & 0x04))
 501                 return -EIO;
 502
 503         return 0;
 504 }
 505
 506 static int __do_config_autodelink(struct us_data *us, u8 *data, u16 len)
 507 {
 508         int retval;
 509         u8 cmnd[12] = {0};
 510         u8 *buf;
 511
 512         US_DEBUGP("%s, addr = 0xfe47, len = %d\n", __FUNCTION__, len);
 513
 514         buf = kmemdup(data, len, GFP_NOIO);
 515         if (!buf)
 516                 return USB_STOR_TRANSPORT_ERROR;
 517
 518         cmnd[0] = 0xF0;
 519         cmnd[1] = 0x0E;
 520         cmnd[2] = 0xfe;
 521         cmnd[3] = 0x47;
 522         cmnd[4] = (u8)(len >> 8);
 523         cmnd[5] = (u8)len;
 524
 525         retval = rts51x_bulk_transport_special(us, 0, cmnd, 12, buf, len, DMA_TO_DEVICE, NULL);
 526         kfree(buf);
 527         if (retval != USB_STOR_TRANSPORT_GOOD) {
 528                 return -EIO;
 529         }
 530
 531         return 0;
 532 }
 533
 534 static int do_config_autodelink(struct us_data *us, int enable, int force)
 535 {
 536         int retval;
 537         u8 value;
 538
 539         retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 540         if (retval < 0)
 541                 return -EIO;
 542
 543         if (enable) {
 544                 if (force)
 545                         value |= 0x03;
 546                 else
 547                         value |= 0x01;
 548         } else {
 549                 value &= ~0x03;
 550         }
 551
 552         US_DEBUGP("In %s,set 0xfe47 to 0x%x\n", __func__, value);
 553
 554         /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 555         retval = __do_config_autodelink(us, &value, 1);
 556         if (retval < 0)
 557                 return -EIO;
 558
 559         return 0;
 560 }
 561
 562 static int config_autodelink_after_power_on(struct us_data *us)
 563 {
 564         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 565         int retval;
 566         u8 value;
 567
 568         US_DEBUGP("%s: <---\n", __func__);
 569
 570         if (!CHK_AUTO_DELINK(chip))
 571                 return 0;
 572
 573         retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 574         if (retval < 0)
 575                 return -EIO;
 576
 577         if (auto_delink_en) {
 578                 CLR_BIT(value, 0);
 579                 CLR_BIT(value, 1);
 580                 SET_BIT(value, 2);
 581
 582                 if (CHECK_ID(chip, 0x0138, 0x3882))
 583                         CLR_BIT(value, 2);
 584
 585                 SET_BIT(value, 7);
 586
 587                 /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 588                 retval = __do_config_autodelink(us, &value, 1);
 589                 if (retval < 0)
 590                         return -EIO;
 591
 592                 retval = enable_oscillator(us);
 593                 if (retval == 0)
 594                         (void)do_config_autodelink(us, 1, 0);
 595         } else {
 596                 /* Autodelink controlled by firmware */
 597
 598                 SET_BIT(value, 2);
 599
 600                 if (CHECK_ID(chip, 0x0138, 0x3882))
 601                         CLR_BIT(value, 2);
 602
 603                 if (CHECK_ID(chip, 0x0159, 0x5889) ||
 604                     CHECK_ID(chip, 0x0138, 0x3880)) {
 605                         CLR_BIT(value, 0);
 606                         CLR_BIT(value, 7);
 607                 }
 608
 609                 /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 610                 retval = __do_config_autodelink(us, &value, 1);
 611                 if (retval < 0)
 612                         return -EIO;
 613
 614                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 615                         value = 0xFF;
 616                         retval = rts51x_write_mem(us, 0xFE79, &value, 1);
 617                         if (retval < 0)
 618                                 return -EIO;
 619
 620                         value = 0x01;
 621                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 622                         if (retval < 0)
 623                                 return -EIO;
 624                 }
 625         }
 626
 627         US_DEBUGP("%s: --->\n", __func__);
 628
 629         return 0;
 630 }
 631
 632 static int config_autodelink_before_power_down(struct us_data *us)
 633 {
 634         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 635         int retval;
 636         u8 value;
 637
 638         US_DEBUGP("%s: <---\n", __func__);
 639
 640         if (!CHK_AUTO_DELINK(chip))
 641                 return 0;
 642
 643         if (auto_delink_en) {
 644                 retval = rts51x_read_mem(us, 0xFE77, &value, 1);
 645                 if (retval < 0)
 646                         return -EIO;
 647
 648                 SET_BIT(value, 2);
 649                 retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 650                 if (retval < 0)
 651                         return -EIO;
 652
 653                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 654                         value = 0x01;
 655                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 656                         if (retval < 0)
 657                                 return -EIO;
 658                 }
 659
 660                 retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 661                 if (retval < 0)
 662                         return -EIO;
 663
 664                 SET_BIT(value, 0);
 665                 if (CHECK_ID(chip, 0x0138, 0x3882))
 666                         SET_BIT(value, 2);
 667                 retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 668                 if (retval < 0)
 669                         return -EIO;
 670         } else {
 671                 if (CHECK_ID(chip, 0x0159, 0x5889) ||
 672                     CHECK_ID(chip, 0x0138, 0x3880) ||
 673                     CHECK_ID(chip, 0x0138, 0x3882)) {
 674                         retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 675                         if (retval < 0)
 676                                 return -EIO;
 677
 678                         if (CHECK_ID(chip, 0x0159, 0x5889) ||
 679                             CHECK_ID(chip, 0x0138, 0x3880)) {
 680                                 SET_BIT(value, 0);
 681                                 SET_BIT(value, 7);
 682                         }
 683
 684                         if (CHECK_ID(chip, 0x0138, 0x3882))
 685                                 SET_BIT(value, 2);
 686
 687                         /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 688                         retval = __do_config_autodelink(us, &value, 1);
 689                         if (retval < 0)
 690                                 return -EIO;
 691                 }
 692
 693                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 694                         value = 0x01;
 695                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 696                         if (retval < 0)
 697                                 return -EIO;
 698                 }
 699         }
 700
 701         US_DEBUGP("%s: --->\n", __func__);
 702
 703         return 0;
 704 }
 705
 706 static void fw5895_init(struct us_data *us)
 707 {
 708         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 709         int retval;
 710         u8 val;
 711
 712         US_DEBUGP("%s: <---\n", __func__);
 713
 714         if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
 715                 US_DEBUGP("Not the specified device, return immediately!\n");
 716         } else {
 717                 retval = rts51x_read_mem(us, 0xFD6F, &val, 1);
 718                 if (retval == STATUS_SUCCESS && (val & 0x1F) == 0) {
 719                         val = 0x1F;
 720                         retval = rts51x_write_mem(us, 0xFD70, &val, 1);
 721                         if (retval != STATUS_SUCCESS)
 722                                 US_DEBUGP("Write memory fail\n");
 723                 } else {
 724                         US_DEBUGP("Read memory fail, OR (val & 0x1F) != 0\n");
 725                 }
 726         }
 727
 728         US_DEBUGP("%s: --->\n", __func__);
 729 }
 730
 731 #ifdef CONFIG_REALTEK_AUTOPM
 732 static void fw5895_set_mmc_wp(struct us_data *us)
 733 {
 734         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 735         int retval;
 736         u8 buf[13];
 737
 738         US_DEBUGP("%s: <---\n", __func__);
 739
 740         if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
 741                 US_DEBUGP("Not the specified device, return immediately!\n");
 742         } else {
 743                 retval = rts51x_read_mem(us, 0xFD6F, buf, 1);
 744                 if (retval == STATUS_SUCCESS && (buf[0] & 0x24) == 0x24) {
 745                         /* SD Exist and SD WP */
 746                         retval = rts51x_read_mem(us, 0xD04E, buf, 1);
 747                         if (retval == STATUS_SUCCESS) {
 748                                 buf[0] |= 0x04;
 749                                 retval = rts51x_write_mem(us, 0xFD70, buf, 1);
 750                                 if (retval != STATUS_SUCCESS)
 751                                         US_DEBUGP("Write memory fail\n");
 752                         } else {
 753                                 US_DEBUGP("Read memory fail\n");
 754                         }
 755                 } else {
 756                         US_DEBUGP("Read memory fail, OR (buf[0]&0x24)!=0x24\n");
 757                 }
 758         }
 759
 760         US_DEBUGP("%s: --->\n", __func__);
 761 }
 762
 763 static void rts51x_modi_suspend_timer(struct rts51x_chip *chip)
 764 {
 765         US_DEBUGP("%s: <---, state:%d\n", __func__, rts51x_get_stat(chip));
 766
 767         chip->timer_expires = jiffies + msecs_to_jiffies(1000*ss_delay);
 768         mod_timer(&chip->rts51x_suspend_timer, chip->timer_expires);
 769
 770         US_DEBUGP("%s: --->\n", __func__);
 771 }
 772
 773 static void rts51x_suspend_timer_fn(unsigned long data)
 774 {
 775         struct rts51x_chip *chip = (struct rts51x_chip *)data;
 776         struct us_data *us = chip->us;
 777
 778         US_DEBUGP("%s: <---\n", __func__);
 779
 780         switch (rts51x_get_stat(chip)) {
 781         case RTS51X_STAT_INIT:
 782         case RTS51X_STAT_RUN:
 783                 rts51x_modi_suspend_timer(chip);
 784                 break;
 785         case RTS51X_STAT_IDLE:
 786         case RTS51X_STAT_SS:
 787                 US_DEBUGP("%s: RTS51X_STAT_SS, intf->pm_usage_cnt:%d,"
 788                         "power.usage:%d\n", __func__,
 789                         atomic_read(&us->pusb_intf->pm_usage_cnt),
 790                         atomic_read(&us->pusb_intf->dev.power.usage_count));
 791
 792                 if (atomic_read(&us->pusb_intf->pm_usage_cnt) > 0) {
 793                         US_DEBUGP("%s: Ready to enter SS state.\n",
 794                                   __func__);
 795                         rts51x_set_stat(chip, RTS51X_STAT_SS);
 796                         /* ignore mass storage interface's children */
 797                         pm_suspend_ignore_children(&us->pusb_intf->dev, true);
 798                         usb_autopm_put_interface_async(us->pusb_intf);
 799                         US_DEBUGP("%s: RTS51X_STAT_SS 01,"
 800                                 "intf->pm_usage_cnt:%d, power.usage:%d\n",
 801                                 __func__,
 802                                 atomic_read(&us->pusb_intf->pm_usage_cnt),
 803                                 atomic_read(
 804                                         &us->pusb_intf->dev.power.usage_count));
 805                 }
 806                 break;
 807         default:
 808                 US_DEBUGP("%s: Unknonwn state !!!\n", __func__);
 809                 break;
 810         }
 811
 812         US_DEBUGP("%s: --->\n", __func__);
 813 }
 814
 815 static inline int working_scsi(struct scsi_cmnd *srb)
 816 {
 817         if ((srb->cmnd[0] == TEST_UNIT_READY) ||
 818             (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL)) {
 819                 return 0;
 820         }
 821
 822         return 1;
 823 }
 824
 825 static void rts51x_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
 826 {
 827         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 828         static int card_first_show = 1;
 829         static u8 media_not_present[] = { 0x70, 0, 0x02, 0, 0, 0, 0,
 830                 10, 0, 0, 0, 0, 0x3A, 0, 0, 0, 0, 0
 831         };
 832         static u8 invalid_cmd_field[] = { 0x70, 0, 0x05, 0, 0, 0, 0,
 833                 10, 0, 0, 0, 0, 0x24, 0, 0, 0, 0, 0
 834         };
 835         int ret;
 836
 837         US_DEBUGP("%s: <---\n", __func__);
 838
 839         if (working_scsi(srb)) {
 840                 US_DEBUGP("%s: working scsi, intf->pm_usage_cnt:%d,"
 841                         "power.usage:%d\n", __func__,
 842                         atomic_read(&us->pusb_intf->pm_usage_cnt),
 843                         atomic_read(&us->pusb_intf->dev.power.usage_count));
 844
 845                 if (atomic_read(&us->pusb_intf->pm_usage_cnt) <= 0) {
 846                         ret = usb_autopm_get_interface(us->pusb_intf);
 847                         US_DEBUGP("%s: working scsi, ret=%d\n", __func__, ret);
 848                 }
 849                 if (rts51x_get_stat(chip) != RTS51X_STAT_RUN)
 850                         rts51x_set_stat(chip, RTS51X_STAT_RUN);
 851                 chip->proto_handler_backup(srb, us);
 852         } else {
 853                 if (rts51x_get_stat(chip) == RTS51X_STAT_SS) {
 854                         US_DEBUGP("%s: NOT working scsi\n", __func__);
 855                         if ((srb->cmnd[0] == TEST_UNIT_READY) &&
 856                             (chip->pwr_state == US_SUSPEND)) {
 857                                 if (TST_LUN_READY(chip, srb->device->lun)) {
 858                                         srb->result = SAM_STAT_GOOD;
 859                                 } else {
 860                                         srb->result = SAM_STAT_CHECK_CONDITION;
 861                                         memcpy(srb->sense_buffer,
 862                                                media_not_present,
 863                                                US_SENSE_SIZE);
 864                                 }
 865                                 US_DEBUGP("%s: TEST_UNIT_READY--->\n",
 866                                           __func__);
 867                                 goto out;
 868                         }
 869                         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
 870                                 int prevent = srb->cmnd[4] & 0x1;
 871                                 if (prevent) {
 872                                         srb->result = SAM_STAT_CHECK_CONDITION;
 873                                         memcpy(srb->sense_buffer,
 874                                                invalid_cmd_field,
 875                                                US_SENSE_SIZE);
 876                                 } else {
 877                                         srb->result = SAM_STAT_GOOD;
 878                                 }
 879                                 US_DEBUGP("%s: ALLOW_MEDIUM_REMOVAL--->\n",
 880                                           __func__);
 881                                 goto out;
 882                         }
 883                 } else {
 884                         US_DEBUGP("%s: NOT working scsi, not SS\n", __func__);
 885                         chip->proto_handler_backup(srb, us);
 886                         /* Check whether card is plugged in */
 887                         if (srb->cmnd[0] == TEST_UNIT_READY) {
 888                                 if (srb->result == SAM_STAT_GOOD) {
 889                                         SET_LUN_READY(chip, srb->device->lun);
 890                                         if (card_first_show) {
 891                                                 card_first_show = 0;
 892                                                 fw5895_set_mmc_wp(us);
 893                                         }
 894                                 } else {
 895                                         CLR_LUN_READY(chip, srb->device->lun);
 896                                         card_first_show = 1;
 897                                 }
 898                         }
 899                         if (rts51x_get_stat(chip) != RTS51X_STAT_IDLE)
 900                                 rts51x_set_stat(chip, RTS51X_STAT_IDLE);
 901                 }
 902         }
 903 out:
 904         US_DEBUGP("%s: state:%d\n", __func__, rts51x_get_stat(chip));
 905         if (rts51x_get_stat(chip) == RTS51X_STAT_RUN)
 906                 rts51x_modi_suspend_timer(chip);
 907
 908         US_DEBUGP("%s: --->\n", __func__);
 909 }
 910
 911 static int realtek_cr_autosuspend_setup(struct us_data *us)
 912 {
 913         struct rts51x_chip *chip;
 914         struct rts51x_status *status = NULL;
 915         u8 buf[16];
 916         int retval;
 917
 918         chip = (struct rts51x_chip *)us->extra;
 919         chip->support_auto_delink = 0;
 920         chip->pwr_state = US_RESUME;
 921         chip->lun_ready = 0;
 922         rts51x_set_stat(chip, RTS51X_STAT_INIT);
 923
 924         retval = rts51x_read_status(us, 0, buf, 16, &(chip->status_len));
 925         if (retval != STATUS_SUCCESS) {
 926                 US_DEBUGP("Read status fail\n");
 927                 return -EIO;
 928         }
 929         status = chip->status;
 930         status->vid = ((u16) buf[0] << 8) | buf[1];
 931         status->pid = ((u16) buf[2] << 8) | buf[3];
 932         status->cur_lun = buf[4];
 933         status->card_type = buf[5];
 934         status->total_lun = buf[6];
 935         status->fw_ver = ((u16) buf[7] << 8) | buf[8];
 936         status->phy_exist = buf[9];
 937         status->multi_flag = buf[10];
 938         status->multi_card = buf[11];
 939         status->log_exist = buf[12];
 940         if (chip->status_len == 16) {
 941                 status->detailed_type.detailed_type1 = buf[13];
 942                 status->function[0] = buf[14];
 943                 status->function[1] = buf[15];
 944         }
 945
 946         /* back up the proto_handler in us->extra */
 947         chip = (struct rts51x_chip *)(us->extra);
 948         chip->proto_handler_backup = us->proto_handler;
 949         /* Set the autosuspend_delay to 0 */
 950         pm_runtime_set_autosuspend_delay(&us->pusb_dev->dev, 0);
 951         /* override us->proto_handler setted in get_protocol() */
 952         us->proto_handler = rts51x_invoke_transport;
 953
 954         chip->timer_expires = 0;
 955         setup_timer(&chip->rts51x_suspend_timer, rts51x_suspend_timer_fn,
 956                         (unsigned long)chip);
 957         fw5895_init(us);
 958
 959         /* enable autosuspend funciton of the usb device */
 960         usb_enable_autosuspend(us->pusb_dev);
 961
 962         return 0;
 963 }
 964 #endif
 965
 966 static void realtek_cr_destructor(void *extra)
 967 {
 968         struct rts51x_chip *chip = (struct rts51x_chip *)extra;
 969
 970         US_DEBUGP("%s: <---\n", __func__);
 971
 972         if (!chip)
 973                 return;
 974 #ifdef CONFIG_REALTEK_AUTOPM
 975         if (ss_en) {
 976                 del_timer(&chip->rts51x_suspend_timer);
 977                 chip->timer_expires = 0;
 978         }
 979 #endif
 980         kfree(chip->status);
 981 }
 982
 983 #ifdef CONFIG_PM
 984 static int realtek_cr_suspend(struct usb_interface *iface, pm_message_t message)
 985 {
 986         struct us_data *us = usb_get_intfdata(iface);
 987
 988         US_DEBUGP("%s: <---\n", __func__);
 989
 990         /* wait until no command is running */
 991         mutex_lock(&us->dev_mutex);
 992
 993         config_autodelink_before_power_down(us);
 994
 995         mutex_unlock(&us->dev_mutex);
 996
 997         US_DEBUGP("%s: --->\n", __func__);
 998
 999         return 0;
1000 }
1001
1002 static int realtek_cr_resume(struct usb_interface *iface)
1003 {
1004         struct us_data *us = usb_get_intfdata(iface);
1005
1006         US_DEBUGP("%s: <---\n", __func__);
1007
1008         fw5895_init(us);
1009         config_autodelink_after_power_on(us);
1010
1011         US_DEBUGP("%s: --->\n", __func__);
1012
1013         return 0;
1014 }
1015 #else
1016 #define realtek_cr_suspend      NULL
1017 #define realtek_cr_resume       NULL
1018 #endif
1019
1020 static int init_realtek_cr(struct us_data *us)
1021 {
1022         struct rts51x_chip *chip;
1023         int size, i, retval;
1024
1025         chip = kzalloc(sizeof(struct rts51x_chip), GFP_KERNEL);
1026         if (!chip)
1027                 return -ENOMEM;
1028
1029         us->extra = chip;
1030         us->extra_destructor = realtek_cr_destructor;
1031         us->max_lun = chip->max_lun = rts51x_get_max_lun(us);
1032
1033         US_DEBUGP("chip->max_lun = %d\n", chip->max_lun);
1034
1035         size = (chip->max_lun + 1) * sizeof(struct rts51x_status);
1036         chip->status = kzalloc(size, GFP_KERNEL);
1037         if (!chip->status)
1038                 goto INIT_FAIL;
1039
1040         for (i = 0; i <= (int)(chip->max_lun); i++) {
1041                 retval = rts51x_check_status(us, (u8) i);
1042                 if (retval < 0)
1043                         goto INIT_FAIL;
1044         }
1045
1046         if (CHECK_FW_VER(chip, 0x5888) || CHECK_FW_VER(chip, 0x5889) ||
1047             CHECK_FW_VER(chip, 0x5901))
1048                 SET_AUTO_DELINK(chip);
1049         if (STATUS_LEN(chip) == 16) {
1050                 if (SUPPORT_AUTO_DELINK(chip))
1051                         SET_AUTO_DELINK(chip);
1052         }
1053 #ifdef CONFIG_REALTEK_AUTOPM
1054         if (ss_en) {
1055                 chip->us = us;
1056                 realtek_cr_autosuspend_setup(us);
1057         }
1058 #endif
1059
1060         US_DEBUGP("chip->flag = 0x%x\n", chip->flag);
1061
1062         (void)config_autodelink_after_power_on(us);
1063
1064         return 0;
1065
1066 INIT_FAIL:
1067         if (us->extra) {
1068                 kfree(chip->status);
1069                 kfree(us->extra);
1070                 us->extra = NULL;
1071         }
1072
1073         return -EIO;
1074 }
1075
1076 static int realtek_cr_probe(struct usb_interface *intf,
1077                             const struct usb_device_id *id)
1078 {
1079         struct us_data *us;
1080         int result;
1081
1082         US_DEBUGP("Probe Realtek Card Reader!\n");
1083
1084         result = usb_stor_probe1(&us, intf, id,
1085                                  (id - realtek_cr_ids) +
1086                                  realtek_cr_unusual_dev_list);
1087         if (result)
1088                 return result;
1089
1090         result = usb_stor_probe2(us);
1091
1092         return result;
1093 }
1094
1095 static struct usb_driver realtek_cr_driver = {
1096         .name = "ums-realtek",
1097         .probe = realtek_cr_probe,
1098         .disconnect = usb_stor_disconnect,
1099         /* .suspend =      usb_stor_suspend, */
1100         /* .resume =       usb_stor_resume, */
1101         .reset_resume = usb_stor_reset_resume,
1102         .suspend = realtek_cr_suspend,
1103         .resume = realtek_cr_resume,
1104         .pre_reset = usb_stor_pre_reset,
1105         .post_reset = usb_stor_post_reset,
1106         .id_table = realtek_cr_ids,
1107         .soft_unbind = 1,
1108         .supports_autosuspend = 1,
1109         .no_dynamic_id = 1,
1110 };
1111
1112 module_usb_driver(realtek_cr_driver);