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)|(USB_US_TYPE_STOR<<24)\
 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) ? 1 << 7 : 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) ? 1 << 7 : 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 = kmalloc(len, GFP_NOIO);
 402         if (buf == NULL)
 403                 return USB_STOR_TRANSPORT_ERROR;
 404         memcpy(buf, data, len);
 405
 406         US_DEBUGP("%s, addr = 0x%x, len = %d\n", __func__, addr, len);
 407
 408         cmnd[0] = 0xF0;
 409         cmnd[1] = 0x0E;
 410         cmnd[2] = (u8) (addr >> 8);
 411         cmnd[3] = (u8) addr;
 412         cmnd[4] = (u8) (len >> 8);
 413         cmnd[5] = (u8) len;
 414
 415         retval = rts51x_bulk_transport(us, 0, cmnd, 12,
 416                                        buf, len, DMA_TO_DEVICE, NULL);
 417         kfree(buf);
 418         if (retval != USB_STOR_TRANSPORT_GOOD)
 419                 return -EIO;
 420
 421         return 0;
 422 }
 423
 424 static int rts51x_read_status(struct us_data *us,
 425                               u8 lun, u8 *status, int len, int *actlen)
 426 {
 427         int retval;
 428         u8 cmnd[12] = { 0 };
 429         u8 *buf;
 430
 431         buf = kmalloc(len, GFP_NOIO);
 432         if (buf == NULL)
 433                 return USB_STOR_TRANSPORT_ERROR;
 434
 435         US_DEBUGP("%s, lun = %d\n", __func__, lun);
 436
 437         cmnd[0] = 0xF0;
 438         cmnd[1] = 0x09;
 439
 440         retval = rts51x_bulk_transport(us, lun, cmnd, 12,
 441                                        buf, len, DMA_FROM_DEVICE, actlen);
 442         if (retval != USB_STOR_TRANSPORT_GOOD) {
 443                 kfree(buf);
 444                 return -EIO;
 445         }
 446
 447         memcpy(status, buf, len);
 448         kfree(buf);
 449         return 0;
 450 }
 451
 452 static int rts51x_check_status(struct us_data *us, u8 lun)
 453 {
 454         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 455         int retval;
 456         u8 buf[16];
 457
 458         retval = rts51x_read_status(us, lun, buf, 16, &(chip->status_len));
 459         if (retval < 0)
 460                 return -EIO;
 461
 462         US_DEBUGP("chip->status_len = %d\n", chip->status_len);
 463
 464         chip->status[lun].vid = ((u16) buf[0] << 8) | buf[1];
 465         chip->status[lun].pid = ((u16) buf[2] << 8) | buf[3];
 466         chip->status[lun].cur_lun = buf[4];
 467         chip->status[lun].card_type = buf[5];
 468         chip->status[lun].total_lun = buf[6];
 469         chip->status[lun].fw_ver = ((u16) buf[7] << 8) | buf[8];
 470         chip->status[lun].phy_exist = buf[9];
 471         chip->status[lun].multi_flag = buf[10];
 472         chip->status[lun].multi_card = buf[11];
 473         chip->status[lun].log_exist = buf[12];
 474         if (chip->status_len == 16) {
 475                 chip->status[lun].detailed_type.detailed_type1 = buf[13];
 476                 chip->status[lun].function[0] = buf[14];
 477                 chip->status[lun].function[1] = buf[15];
 478         }
 479
 480         return 0;
 481 }
 482
 483 static int enable_oscillator(struct us_data *us)
 484 {
 485         int retval;
 486         u8 value;
 487
 488         retval = rts51x_read_mem(us, 0xFE77, &value, 1);
 489         if (retval < 0)
 490                 return -EIO;
 491
 492         value |= 0x04;
 493         retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 494         if (retval < 0)
 495                 return -EIO;
 496
 497         retval = rts51x_read_mem(us, 0xFE77, &value, 1);
 498         if (retval < 0)
 499                 return -EIO;
 500
 501         if (!(value & 0x04))
 502                 return -EIO;
 503
 504         return 0;
 505 }
 506
 507 static int __do_config_autodelink(struct us_data *us, u8 *data, u16 len)
 508 {
 509         int retval;
 510         u16 addr = 0xFE47;
 511         u8 cmnd[12] = {0};
 512
 513         US_DEBUGP("%s, addr = 0x%x, len = %d\n", __FUNCTION__, addr, len);
 514
 515         cmnd[0] = 0xF0;
 516         cmnd[1] = 0x0E;
 517         cmnd[2] = (u8)(addr >> 8);
 518         cmnd[3] = (u8)addr;
 519         cmnd[4] = (u8)(len >> 8);
 520         cmnd[5] = (u8)len;
 521
 522         retval = rts51x_bulk_transport_special(us, 0, cmnd, 12, data, len, DMA_TO_DEVICE, NULL);
 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         US_DEBUGP("In %s,set 0xfe47 to 0x%x\n", __func__, 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         US_DEBUGP("%s: <---\n", __func__);
 565
 566         if (!CHK_AUTO_DELINK(chip))
 567                 return 0;
 568
 569         retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 570         if (retval < 0)
 571                 return -EIO;
 572
 573         if (auto_delink_en) {
 574                 CLR_BIT(value, 0);
 575                 CLR_BIT(value, 1);
 576                 SET_BIT(value, 2);
 577
 578                 if (CHECK_ID(chip, 0x0138, 0x3882))
 579                         CLR_BIT(value, 2);
 580
 581                 SET_BIT(value, 7);
 582
 583                 /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 584                 retval = __do_config_autodelink(us, &value, 1);
 585                 if (retval < 0)
 586                         return -EIO;
 587
 588                 retval = enable_oscillator(us);
 589                 if (retval == 0)
 590                         (void)do_config_autodelink(us, 1, 0);
 591         } else {
 592                 /* Autodelink controlled by firmware */
 593
 594                 SET_BIT(value, 2);
 595
 596                 if (CHECK_ID(chip, 0x0138, 0x3882))
 597                         CLR_BIT(value, 2);
 598
 599                 if (CHECK_ID(chip, 0x0159, 0x5889) ||
 600                     CHECK_ID(chip, 0x0138, 0x3880)) {
 601                         CLR_BIT(value, 0);
 602                         CLR_BIT(value, 7);
 603                 }
 604
 605                 /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 606                 retval = __do_config_autodelink(us, &value, 1);
 607                 if (retval < 0)
 608                         return -EIO;
 609
 610                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 611                         value = 0xFF;
 612                         retval = rts51x_write_mem(us, 0xFE79, &value, 1);
 613                         if (retval < 0)
 614                                 return -EIO;
 615
 616                         value = 0x01;
 617                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 618                         if (retval < 0)
 619                                 return -EIO;
 620                 }
 621         }
 622
 623         US_DEBUGP("%s: --->\n", __func__);
 624
 625         return 0;
 626 }
 627
 628 static int config_autodelink_before_power_down(struct us_data *us)
 629 {
 630         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 631         int retval;
 632         u8 value;
 633
 634         US_DEBUGP("%s: <---\n", __func__);
 635
 636         if (!CHK_AUTO_DELINK(chip))
 637                 return 0;
 638
 639         if (auto_delink_en) {
 640                 retval = rts51x_read_mem(us, 0xFE77, &value, 1);
 641                 if (retval < 0)
 642                         return -EIO;
 643
 644                 SET_BIT(value, 2);
 645                 retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 646                 if (retval < 0)
 647                         return -EIO;
 648
 649                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 650                         value = 0x01;
 651                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 652                         if (retval < 0)
 653                                 return -EIO;
 654                 }
 655
 656                 retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 657                 if (retval < 0)
 658                         return -EIO;
 659
 660                 SET_BIT(value, 0);
 661                 if (CHECK_ID(chip, 0x0138, 0x3882))
 662                         SET_BIT(value, 2);
 663                 retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 664                 if (retval < 0)
 665                         return -EIO;
 666         } else {
 667                 if (CHECK_ID(chip, 0x0159, 0x5889) ||
 668                     CHECK_ID(chip, 0x0138, 0x3880) ||
 669                     CHECK_ID(chip, 0x0138, 0x3882)) {
 670                         retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 671                         if (retval < 0)
 672                                 return -EIO;
 673
 674                         if (CHECK_ID(chip, 0x0159, 0x5889) ||
 675                             CHECK_ID(chip, 0x0138, 0x3880)) {
 676                                 SET_BIT(value, 0);
 677                                 SET_BIT(value, 7);
 678                         }
 679
 680                         if (CHECK_ID(chip, 0x0138, 0x3882))
 681                                 SET_BIT(value, 2);
 682
 683                         /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 684                         retval = __do_config_autodelink(us, &value, 1);
 685                         if (retval < 0)
 686                                 return -EIO;
 687                 }
 688
 689                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 690                         value = 0x01;
 691                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 692                         if (retval < 0)
 693                                 return -EIO;
 694                 }
 695         }
 696
 697         US_DEBUGP("%s: --->\n", __func__);
 698
 699         return 0;
 700 }
 701
 702 static void fw5895_init(struct us_data *us)
 703 {
 704         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 705         int retval;
 706         u8 val;
 707
 708         US_DEBUGP("%s: <---\n", __func__);
 709
 710         if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
 711                 US_DEBUGP("Not the specified device, return immediately!\n");
 712         } else {
 713                 retval = rts51x_read_mem(us, 0xFD6F, &val, 1);
 714                 if (retval == STATUS_SUCCESS && (val & 0x1F) == 0) {
 715                         val = 0x1F;
 716                         retval = rts51x_write_mem(us, 0xFD70, &val, 1);
 717                         if (retval != STATUS_SUCCESS)
 718                                 US_DEBUGP("Write memory fail\n");
 719                 } else {
 720                         US_DEBUGP("Read memory fail, OR (val & 0x1F) != 0\n");
 721                 }
 722         }
 723
 724         US_DEBUGP("%s: --->\n", __func__);
 725 }
 726
 727 #ifdef CONFIG_REALTEK_AUTOPM
 728 static void fw5895_set_mmc_wp(struct us_data *us)
 729 {
 730         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 731         int retval;
 732         u8 buf[13];
 733
 734         US_DEBUGP("%s: <---\n", __func__);
 735
 736         if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
 737                 US_DEBUGP("Not the specified device, return immediately!\n");
 738         } else {
 739                 retval = rts51x_read_mem(us, 0xFD6F, buf, 1);
 740                 if (retval == STATUS_SUCCESS && (buf[0] & 0x24) == 0x24) {
 741                         /* SD Exist and SD WP */
 742                         retval = rts51x_read_mem(us, 0xD04E, buf, 1);
 743                         if (retval == STATUS_SUCCESS) {
 744                                 buf[0] |= 0x04;
 745                                 retval = rts51x_write_mem(us, 0xFD70, buf, 1);
 746                                 if (retval != STATUS_SUCCESS)
 747                                         US_DEBUGP("Write memory fail\n");
 748                         } else {
 749                                 US_DEBUGP("Read memory fail\n");
 750                         }
 751                 } else {
 752                         US_DEBUGP("Read memory fail, OR (buf[0]&0x24)!=0x24\n");
 753                 }
 754         }
 755
 756         US_DEBUGP("%s: --->\n", __func__);
 757 }
 758
 759 static void rts51x_modi_suspend_timer(struct rts51x_chip *chip)
 760 {
 761         US_DEBUGP("%s: <---, state:%d\n", __func__, rts51x_get_stat(chip));
 762
 763         chip->timer_expires = jiffies + msecs_to_jiffies(1000*ss_delay);
 764         mod_timer(&chip->rts51x_suspend_timer, chip->timer_expires);
 765
 766         US_DEBUGP("%s: --->\n", __func__);
 767 }
 768
 769 static void rts51x_suspend_timer_fn(unsigned long data)
 770 {
 771         struct rts51x_chip *chip = (struct rts51x_chip *)data;
 772         struct us_data *us = chip->us;
 773
 774         US_DEBUGP("%s: <---\n", __func__);
 775
 776         switch (rts51x_get_stat(chip)) {
 777         case RTS51X_STAT_INIT:
 778         case RTS51X_STAT_RUN:
 779                 rts51x_modi_suspend_timer(chip);
 780                 break;
 781         case RTS51X_STAT_IDLE:
 782         case RTS51X_STAT_SS:
 783                 US_DEBUGP("%s: RTS51X_STAT_SS, intf->pm_usage_cnt:%d,"
 784                         "power.usage:%d\n", __func__,
 785                         atomic_read(&us->pusb_intf->pm_usage_cnt),
 786                         atomic_read(&us->pusb_intf->dev.power.usage_count));
 787
 788                 if (atomic_read(&us->pusb_intf->pm_usage_cnt) > 0) {
 789                         US_DEBUGP("%s: Ready to enter SS state.\n",
 790                                   __func__);
 791                         rts51x_set_stat(chip, RTS51X_STAT_SS);
 792                         /* ignore mass storage interface's children */
 793                         pm_suspend_ignore_children(&us->pusb_intf->dev, true);
 794                         usb_autopm_put_interface_async(us->pusb_intf);
 795                         US_DEBUGP("%s: RTS51X_STAT_SS 01,"
 796                                 "intf->pm_usage_cnt:%d, power.usage:%d\n",
 797                                 __func__,
 798                                 atomic_read(&us->pusb_intf->pm_usage_cnt),
 799                                 atomic_read(
 800                                         &us->pusb_intf->dev.power.usage_count));
 801                 }
 802                 break;
 803         default:
 804                 US_DEBUGP("%s: Unknonwn state !!!\n", __func__);
 805                 break;
 806         }
 807
 808         US_DEBUGP("%s: --->\n", __func__);
 809 }
 810
 811 static inline int working_scsi(struct scsi_cmnd *srb)
 812 {
 813         if ((srb->cmnd[0] == TEST_UNIT_READY) ||
 814             (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL)) {
 815                 return 0;
 816         }
 817
 818         return 1;
 819 }
 820
 821 void rts51x_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
 822 {
 823         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 824         static int card_first_show = 1;
 825         static u8 media_not_present[] = { 0x70, 0, 0x02, 0, 0, 0, 0,
 826                 10, 0, 0, 0, 0, 0x3A, 0, 0, 0, 0, 0
 827         };
 828         static u8 invalid_cmd_field[] = { 0x70, 0, 0x05, 0, 0, 0, 0,
 829                 10, 0, 0, 0, 0, 0x24, 0, 0, 0, 0, 0
 830         };
 831         int ret;
 832
 833         US_DEBUGP("%s: <---\n", __func__);
 834
 835         if (working_scsi(srb)) {
 836                 US_DEBUGP("%s: working scsi, intf->pm_usage_cnt:%d,"
 837                         "power.usage:%d\n", __func__,
 838                         atomic_read(&us->pusb_intf->pm_usage_cnt),
 839                         atomic_read(&us->pusb_intf->dev.power.usage_count));
 840
 841                 if (atomic_read(&us->pusb_intf->pm_usage_cnt) <= 0) {
 842                         ret = usb_autopm_get_interface(us->pusb_intf);
 843                         US_DEBUGP("%s: working scsi, ret=%d\n", __func__, ret);
 844                 }
 845                 if (rts51x_get_stat(chip) != RTS51X_STAT_RUN)
 846                         rts51x_set_stat(chip, RTS51X_STAT_RUN);
 847                 chip->proto_handler_backup(srb, us);
 848         } else {
 849                 if (rts51x_get_stat(chip) == RTS51X_STAT_SS) {
 850                         US_DEBUGP("%s: NOT working scsi\n", __func__);
 851                         if ((srb->cmnd[0] == TEST_UNIT_READY) &&
 852                             (chip->pwr_state == US_SUSPEND)) {
 853                                 if (TST_LUN_READY(chip, srb->device->lun)) {
 854                                         srb->result = SAM_STAT_GOOD;
 855                                 } else {
 856                                         srb->result = SAM_STAT_CHECK_CONDITION;
 857                                         memcpy(srb->sense_buffer,
 858                                                media_not_present,
 859                                                US_SENSE_SIZE);
 860                                 }
 861                                 US_DEBUGP("%s: TEST_UNIT_READY--->\n",
 862                                           __func__);
 863                                 goto out;
 864                         }
 865                         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
 866                                 int prevent = srb->cmnd[4] & 0x1;
 867                                 if (prevent) {
 868                                         srb->result = SAM_STAT_CHECK_CONDITION;
 869                                         memcpy(srb->sense_buffer,
 870                                                invalid_cmd_field,
 871                                                US_SENSE_SIZE);
 872                                 } else {
 873                                         srb->result = SAM_STAT_GOOD;
 874                                 }
 875                                 US_DEBUGP("%s: ALLOW_MEDIUM_REMOVAL--->\n",
 876                                           __func__);
 877                                 goto out;
 878                         }
 879                 } else {
 880                         US_DEBUGP("%s: NOT working scsi, not SS\n", __func__);
 881                         chip->proto_handler_backup(srb, us);
 882                         /* Check wether card is plugged in */
 883                         if (srb->cmnd[0] == TEST_UNIT_READY) {
 884                                 if (srb->result == SAM_STAT_GOOD) {
 885                                         SET_LUN_READY(chip, srb->device->lun);
 886                                         if (card_first_show) {
 887                                                 card_first_show = 0;
 888                                                 fw5895_set_mmc_wp(us);
 889                                         }
 890                                 } else {
 891                                         CLR_LUN_READY(chip, srb->device->lun);
 892                                         card_first_show = 1;
 893                                 }
 894                         }
 895                         if (rts51x_get_stat(chip) != RTS51X_STAT_IDLE)
 896                                 rts51x_set_stat(chip, RTS51X_STAT_IDLE);
 897                 }
 898         }
 899 out:
 900         US_DEBUGP("%s: state:%d\n", __func__, rts51x_get_stat(chip));
 901         if (rts51x_get_stat(chip) == RTS51X_STAT_RUN)
 902                 rts51x_modi_suspend_timer(chip);
 903
 904         US_DEBUGP("%s: --->\n", __func__);
 905 }
 906
 907 static int realtek_cr_autosuspend_setup(struct us_data *us)
 908 {
 909         struct rts51x_chip *chip;
 910         struct rts51x_status *status = NULL;
 911         u8 buf[16];
 912         int retval;
 913
 914         chip = (struct rts51x_chip *)us->extra;
 915         chip->support_auto_delink = 0;
 916         chip->pwr_state = US_RESUME;
 917         chip->lun_ready = 0;
 918         rts51x_set_stat(chip, RTS51X_STAT_INIT);
 919
 920         retval = rts51x_read_status(us, 0, buf, 16, &(chip->status_len));
 921         if (retval != STATUS_SUCCESS) {
 922                 US_DEBUGP("Read status fail\n");
 923                 return -EIO;
 924         }
 925         status = chip->status;
 926         status->vid = ((u16) buf[0] << 8) | buf[1];
 927         status->pid = ((u16) buf[2] << 8) | buf[3];
 928         status->cur_lun = buf[4];
 929         status->card_type = buf[5];
 930         status->total_lun = buf[6];
 931         status->fw_ver = ((u16) buf[7] << 8) | buf[8];
 932         status->phy_exist = buf[9];
 933         status->multi_flag = buf[10];
 934         status->multi_card = buf[11];
 935         status->log_exist = buf[12];
 936         if (chip->status_len == 16) {
 937                 status->detailed_type.detailed_type1 = buf[13];
 938                 status->function[0] = buf[14];
 939                 status->function[1] = buf[15];
 940         }
 941
 942         /* back up the proto_handler in us->extra */
 943         chip = (struct rts51x_chip *)(us->extra);
 944         chip->proto_handler_backup = us->proto_handler;
 945         /* Set the autosuspend_delay to 0 */
 946         pm_runtime_set_autosuspend_delay(&us->pusb_dev->dev, 0);
 947         /* override us->proto_handler setted in get_protocol() */
 948         us->proto_handler = rts51x_invoke_transport;
 949
 950         chip->timer_expires = 0;
 951         setup_timer(&chip->rts51x_suspend_timer, rts51x_suspend_timer_fn,
 952                         (unsigned long)chip);
 953         fw5895_init(us);
 954
 955         /* enable autosuspend funciton of the usb device */
 956         usb_enable_autosuspend(us->pusb_dev);
 957
 958         return 0;
 959 }
 960 #endif
 961
 962 static void realtek_cr_destructor(void *extra)
 963 {
 964         struct rts51x_chip *chip = (struct rts51x_chip *)extra;
 965
 966         US_DEBUGP("%s: <---\n", __func__);
 967
 968         if (!chip)
 969                 return;
 970 #ifdef CONFIG_REALTEK_AUTOPM
 971         if (ss_en) {
 972                 del_timer(&chip->rts51x_suspend_timer);
 973                 chip->timer_expires = 0;
 974         }
 975 #endif
 976         kfree(chip->status);
 977 }
 978
 979 #ifdef CONFIG_PM
 980 int realtek_cr_suspend(struct usb_interface *iface, pm_message_t message)
 981 {
 982         struct us_data *us = usb_get_intfdata(iface);
 983
 984         US_DEBUGP("%s: <---\n", __func__);
 985
 986         /* wait until no command is running */
 987         mutex_lock(&us->dev_mutex);
 988
 989         config_autodelink_before_power_down(us);
 990
 991         mutex_unlock(&us->dev_mutex);
 992
 993         US_DEBUGP("%s: --->\n", __func__);
 994
 995         return 0;
 996 }
 997
 998 static int realtek_cr_resume(struct usb_interface *iface)
 999 {
1000         struct us_data *us = usb_get_intfdata(iface);
1001
1002         US_DEBUGP("%s: <---\n", __func__);
1003
1004         fw5895_init(us);
1005         config_autodelink_after_power_on(us);
1006
1007         US_DEBUGP("%s: --->\n", __func__);
1008
1009         return 0;
1010 }
1011 #else
1012 #define realtek_cr_suspend      NULL
1013 #define realtek_cr_resume       NULL
1014 #endif
1015
1016 static int init_realtek_cr(struct us_data *us)
1017 {
1018         struct rts51x_chip *chip;
1019         int size, i, retval;
1020
1021         chip = kzalloc(sizeof(struct rts51x_chip), GFP_KERNEL);
1022         if (!chip)
1023                 return -ENOMEM;
1024
1025         us->extra = chip;
1026         us->extra_destructor = realtek_cr_destructor;
1027         us->max_lun = chip->max_lun = rts51x_get_max_lun(us);
1028
1029         US_DEBUGP("chip->max_lun = %d\n", chip->max_lun);
1030
1031         size = (chip->max_lun + 1) * sizeof(struct rts51x_status);
1032         chip->status = kzalloc(size, GFP_KERNEL);
1033         if (!chip->status)
1034                 goto INIT_FAIL;
1035
1036         for (i = 0; i <= (int)(chip->max_lun); i++) {
1037                 retval = rts51x_check_status(us, (u8) i);
1038                 if (retval < 0)
1039                         goto INIT_FAIL;
1040         }
1041
1042         if (CHECK_FW_VER(chip, 0x5888) || CHECK_FW_VER(chip, 0x5889) ||
1043             CHECK_FW_VER(chip, 0x5901))
1044                 SET_AUTO_DELINK(chip);
1045         if (STATUS_LEN(chip) == 16) {
1046                 if (SUPPORT_AUTO_DELINK(chip))
1047                         SET_AUTO_DELINK(chip);
1048         }
1049 #ifdef CONFIG_REALTEK_AUTOPM
1050         if (ss_en) {
1051                 chip->us = us;
1052                 realtek_cr_autosuspend_setup(us);
1053         }
1054 #endif
1055
1056         US_DEBUGP("chip->flag = 0x%x\n", chip->flag);
1057
1058         (void)config_autodelink_after_power_on(us);
1059
1060         return 0;
1061
1062 INIT_FAIL:
1063         if (us->extra) {
1064                 kfree(chip->status);
1065                 kfree(us->extra);
1066                 us->extra = NULL;
1067         }
1068
1069         return -EIO;
1070 }
1071
1072 static int realtek_cr_probe(struct usb_interface *intf,
1073                             const struct usb_device_id *id)
1074 {
1075         struct us_data *us;
1076         int result;
1077
1078         US_DEBUGP("Probe Realtek Card Reader!\n");
1079
1080         result = usb_stor_probe1(&us, intf, id,
1081                                  (id - realtek_cr_ids) +
1082                                  realtek_cr_unusual_dev_list);
1083         if (result)
1084                 return result;
1085
1086         result = usb_stor_probe2(us);
1087
1088         return result;
1089 }
1090
1091 static struct usb_driver realtek_cr_driver = {
1092         .name = "ums-realtek",
1093         .probe = realtek_cr_probe,
1094         .disconnect = usb_stor_disconnect,
1095         /* .suspend =      usb_stor_suspend, */
1096         /* .resume =       usb_stor_resume, */
1097         .reset_resume = usb_stor_reset_resume,
1098         .suspend = realtek_cr_suspend,
1099         .resume = realtek_cr_resume,
1100         .pre_reset = usb_stor_pre_reset,
1101         .post_reset = usb_stor_post_reset,
1102         .id_table = realtek_cr_ids,
1103         .soft_unbind = 1,
1104         .supports_autosuspend = 1,
1105 };
1106
1107 static int __init realtek_cr_init(void)
1108 {
1109         return usb_register(&realtek_cr_driver);
1110 }
1111
1112 static void __exit realtek_cr_exit(void)
1113 {
1114         usb_deregister(&realtek_cr_driver);
1115 }
1116
1117 module_init(realtek_cr_init);
1118 module_exit(realtek_cr_exit);