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 = 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
 511         US_DEBUGP("%s, addr = 0xfe47, len = %d\n", __FUNCTION__, len);
 512
 513         cmnd[0] = 0xF0;
 514         cmnd[1] = 0x0E;
 515         cmnd[2] = 0xfe;
 516         cmnd[3] = 0x47;
 517         cmnd[4] = (u8)(len >> 8);
 518         cmnd[5] = (u8)len;
 519
 520         retval = rts51x_bulk_transport_special(us, 0, cmnd, 12, data, len, DMA_TO_DEVICE, NULL);
 521         if (retval != USB_STOR_TRANSPORT_GOOD) {
 522                 return -EIO;
 523         }
 524
 525         return 0;
 526 }
 527
 528 static int do_config_autodelink(struct us_data *us, int enable, int force)
 529 {
 530         int retval;
 531         u8 value;
 532
 533         retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 534         if (retval < 0)
 535                 return -EIO;
 536
 537         if (enable) {
 538                 if (force)
 539                         value |= 0x03;
 540                 else
 541                         value |= 0x01;
 542         } else {
 543                 value &= ~0x03;
 544         }
 545
 546         US_DEBUGP("In %s,set 0xfe47 to 0x%x\n", __func__, value);
 547
 548         /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 549         retval = __do_config_autodelink(us, &value, 1);
 550         if (retval < 0)
 551                 return -EIO;
 552
 553         return 0;
 554 }
 555
 556 static int config_autodelink_after_power_on(struct us_data *us)
 557 {
 558         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 559         int retval;
 560         u8 value;
 561
 562         US_DEBUGP("%s: <---\n", __func__);
 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         US_DEBUGP("%s: --->\n", __func__);
 622
 623         return 0;
 624 }
 625
 626 static int config_autodelink_before_power_down(struct us_data *us)
 627 {
 628         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 629         int retval;
 630         u8 value;
 631
 632         US_DEBUGP("%s: <---\n", __func__);
 633
 634         if (!CHK_AUTO_DELINK(chip))
 635                 return 0;
 636
 637         if (auto_delink_en) {
 638                 retval = rts51x_read_mem(us, 0xFE77, &value, 1);
 639                 if (retval < 0)
 640                         return -EIO;
 641
 642                 SET_BIT(value, 2);
 643                 retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 644                 if (retval < 0)
 645                         return -EIO;
 646
 647                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 648                         value = 0x01;
 649                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 650                         if (retval < 0)
 651                                 return -EIO;
 652                 }
 653
 654                 retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 655                 if (retval < 0)
 656                         return -EIO;
 657
 658                 SET_BIT(value, 0);
 659                 if (CHECK_ID(chip, 0x0138, 0x3882))
 660                         SET_BIT(value, 2);
 661                 retval = rts51x_write_mem(us, 0xFE77, &value, 1);
 662                 if (retval < 0)
 663                         return -EIO;
 664         } else {
 665                 if (CHECK_ID(chip, 0x0159, 0x5889) ||
 666                     CHECK_ID(chip, 0x0138, 0x3880) ||
 667                     CHECK_ID(chip, 0x0138, 0x3882)) {
 668                         retval = rts51x_read_mem(us, 0xFE47, &value, 1);
 669                         if (retval < 0)
 670                                 return -EIO;
 671
 672                         if (CHECK_ID(chip, 0x0159, 0x5889) ||
 673                             CHECK_ID(chip, 0x0138, 0x3880)) {
 674                                 SET_BIT(value, 0);
 675                                 SET_BIT(value, 7);
 676                         }
 677
 678                         if (CHECK_ID(chip, 0x0138, 0x3882))
 679                                 SET_BIT(value, 2);
 680
 681                         /* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
 682                         retval = __do_config_autodelink(us, &value, 1);
 683                         if (retval < 0)
 684                                 return -EIO;
 685                 }
 686
 687                 if (CHECK_ID(chip, 0x0159, 0x5888)) {
 688                         value = 0x01;
 689                         retval = rts51x_write_mem(us, 0x48, &value, 1);
 690                         if (retval < 0)
 691                                 return -EIO;
 692                 }
 693         }
 694
 695         US_DEBUGP("%s: --->\n", __func__);
 696
 697         return 0;
 698 }
 699
 700 static void fw5895_init(struct us_data *us)
 701 {
 702         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 703         int retval;
 704         u8 val;
 705
 706         US_DEBUGP("%s: <---\n", __func__);
 707
 708         if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
 709                 US_DEBUGP("Not the specified device, return immediately!\n");
 710         } else {
 711                 retval = rts51x_read_mem(us, 0xFD6F, &val, 1);
 712                 if (retval == STATUS_SUCCESS && (val & 0x1F) == 0) {
 713                         val = 0x1F;
 714                         retval = rts51x_write_mem(us, 0xFD70, &val, 1);
 715                         if (retval != STATUS_SUCCESS)
 716                                 US_DEBUGP("Write memory fail\n");
 717                 } else {
 718                         US_DEBUGP("Read memory fail, OR (val & 0x1F) != 0\n");
 719                 }
 720         }
 721
 722         US_DEBUGP("%s: --->\n", __func__);
 723 }
 724
 725 #ifdef CONFIG_REALTEK_AUTOPM
 726 static void fw5895_set_mmc_wp(struct us_data *us)
 727 {
 728         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 729         int retval;
 730         u8 buf[13];
 731
 732         US_DEBUGP("%s: <---\n", __func__);
 733
 734         if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
 735                 US_DEBUGP("Not the specified device, return immediately!\n");
 736         } else {
 737                 retval = rts51x_read_mem(us, 0xFD6F, buf, 1);
 738                 if (retval == STATUS_SUCCESS && (buf[0] & 0x24) == 0x24) {
 739                         /* SD Exist and SD WP */
 740                         retval = rts51x_read_mem(us, 0xD04E, buf, 1);
 741                         if (retval == STATUS_SUCCESS) {
 742                                 buf[0] |= 0x04;
 743                                 retval = rts51x_write_mem(us, 0xFD70, buf, 1);
 744                                 if (retval != STATUS_SUCCESS)
 745                                         US_DEBUGP("Write memory fail\n");
 746                         } else {
 747                                 US_DEBUGP("Read memory fail\n");
 748                         }
 749                 } else {
 750                         US_DEBUGP("Read memory fail, OR (buf[0]&0x24)!=0x24\n");
 751                 }
 752         }
 753
 754         US_DEBUGP("%s: --->\n", __func__);
 755 }
 756
 757 static void rts51x_modi_suspend_timer(struct rts51x_chip *chip)
 758 {
 759         US_DEBUGP("%s: <---, state:%d\n", __func__, rts51x_get_stat(chip));
 760
 761         chip->timer_expires = jiffies + msecs_to_jiffies(1000*ss_delay);
 762         mod_timer(&chip->rts51x_suspend_timer, chip->timer_expires);
 763
 764         US_DEBUGP("%s: --->\n", __func__);
 765 }
 766
 767 static void rts51x_suspend_timer_fn(unsigned long data)
 768 {
 769         struct rts51x_chip *chip = (struct rts51x_chip *)data;
 770         struct us_data *us = chip->us;
 771
 772         US_DEBUGP("%s: <---\n", __func__);
 773
 774         switch (rts51x_get_stat(chip)) {
 775         case RTS51X_STAT_INIT:
 776         case RTS51X_STAT_RUN:
 777                 rts51x_modi_suspend_timer(chip);
 778                 break;
 779         case RTS51X_STAT_IDLE:
 780         case RTS51X_STAT_SS:
 781                 US_DEBUGP("%s: RTS51X_STAT_SS, intf->pm_usage_cnt:%d,"
 782                         "power.usage:%d\n", __func__,
 783                         atomic_read(&us->pusb_intf->pm_usage_cnt),
 784                         atomic_read(&us->pusb_intf->dev.power.usage_count));
 785
 786                 if (atomic_read(&us->pusb_intf->pm_usage_cnt) > 0) {
 787                         US_DEBUGP("%s: Ready to enter SS state.\n",
 788                                   __func__);
 789                         rts51x_set_stat(chip, RTS51X_STAT_SS);
 790                         /* ignore mass storage interface's children */
 791                         pm_suspend_ignore_children(&us->pusb_intf->dev, true);
 792                         usb_autopm_put_interface(us->pusb_intf);
 793                         US_DEBUGP("%s: RTS51X_STAT_SS 01,"
 794                                 "intf->pm_usage_cnt:%d, power.usage:%d\n",
 795                                 __func__,
 796                                 atomic_read(&us->pusb_intf->pm_usage_cnt),
 797                                 atomic_read(
 798                                         &us->pusb_intf->dev.power.usage_count));
 799                 }
 800                 break;
 801         default:
 802                 US_DEBUGP("%s: Unknonwn state !!!\n", __func__);
 803                 break;
 804         }
 805
 806         US_DEBUGP("%s: --->\n", __func__);
 807 }
 808
 809 static inline int working_scsi(struct scsi_cmnd *srb)
 810 {
 811         if ((srb->cmnd[0] == TEST_UNIT_READY) ||
 812             (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL)) {
 813                 return 0;
 814         }
 815
 816         return 1;
 817 }
 818
 819 static void rts51x_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
 820 {
 821         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
 822         static int card_first_show = 1;
 823         static u8 media_not_present[] = { 0x70, 0, 0x02, 0, 0, 0, 0,
 824                 10, 0, 0, 0, 0, 0x3A, 0, 0, 0, 0, 0
 825         };
 826         static u8 invalid_cmd_field[] = { 0x70, 0, 0x05, 0, 0, 0, 0,
 827                 10, 0, 0, 0, 0, 0x24, 0, 0, 0, 0, 0
 828         };
 829         int ret;
 830
 831         US_DEBUGP("%s: <---\n", __func__);
 832
 833         if (working_scsi(srb)) {
 834                 US_DEBUGP("%s: working scsi, intf->pm_usage_cnt:%d,"
 835                         "power.usage:%d\n", __func__,
 836                         atomic_read(&us->pusb_intf->pm_usage_cnt),
 837                         atomic_read(&us->pusb_intf->dev.power.usage_count));
 838
 839                 if (atomic_read(&us->pusb_intf->pm_usage_cnt) <= 0) {
 840                         ret = usb_autopm_get_interface(us->pusb_intf);
 841                         US_DEBUGP("%s: working scsi, ret=%d\n", __func__, ret);
 842                 }
 843                 if (rts51x_get_stat(chip) != RTS51X_STAT_RUN)
 844                         rts51x_set_stat(chip, RTS51X_STAT_RUN);
 845                 chip->proto_handler_backup(srb, us);
 846         } else {
 847                 if (rts51x_get_stat(chip) == RTS51X_STAT_SS) {
 848                         US_DEBUGP("%s: NOT working scsi\n", __func__);
 849                         if ((srb->cmnd[0] == TEST_UNIT_READY) &&
 850                             (chip->pwr_state == US_SUSPEND)) {
 851                                 if (TST_LUN_READY(chip, srb->device->lun)) {
 852                                         srb->result = SAM_STAT_GOOD;
 853                                 } else {
 854                                         srb->result = SAM_STAT_CHECK_CONDITION;
 855                                         memcpy(srb->sense_buffer,
 856                                                media_not_present,
 857                                                US_SENSE_SIZE);
 858                                 }
 859                                 US_DEBUGP("%s: TEST_UNIT_READY--->\n",
 860                                           __func__);
 861                                 goto out;
 862                         }
 863                         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
 864                                 int prevent = srb->cmnd[4] & 0x1;
 865                                 if (prevent) {
 866                                         srb->result = SAM_STAT_CHECK_CONDITION;
 867                                         memcpy(srb->sense_buffer,
 868                                                invalid_cmd_field,
 869                                                US_SENSE_SIZE);
 870                                 } else {
 871                                         srb->result = SAM_STAT_GOOD;
 872                                 }
 873                                 US_DEBUGP("%s: ALLOW_MEDIUM_REMOVAL--->\n",
 874                                           __func__);
 875                                 goto out;
 876                         }
 877                 } else {
 878                         US_DEBUGP("%s: NOT working scsi, not SS\n", __func__);
 879                         chip->proto_handler_backup(srb, us);
 880                         /* Check wether card is plugged in */
 881                         if (srb->cmnd[0] == TEST_UNIT_READY) {
 882                                 if (srb->result == SAM_STAT_GOOD) {
 883                                         SET_LUN_READY(chip, srb->device->lun);
 884                                         if (card_first_show) {
 885                                                 card_first_show = 0;
 886                                                 fw5895_set_mmc_wp(us);
 887                                         }
 888                                 } else {
 889                                         CLR_LUN_READY(chip, srb->device->lun);
 890                                         card_first_show = 1;
 891                                 }
 892                         }
 893                         if (rts51x_get_stat(chip) != RTS51X_STAT_IDLE)
 894                                 rts51x_set_stat(chip, RTS51X_STAT_IDLE);
 895                 }
 896         }
 897 out:
 898         US_DEBUGP("%s: state:%d\n", __func__, rts51x_get_stat(chip));
 899         if (rts51x_get_stat(chip) == RTS51X_STAT_RUN)
 900                 rts51x_modi_suspend_timer(chip);
 901
 902         US_DEBUGP("%s: --->\n", __func__);
 903 }
 904
 905 static int realtek_cr_autosuspend_setup(struct us_data *us)
 906 {
 907         struct rts51x_chip *chip;
 908         struct rts51x_status *status = NULL;
 909         u8 buf[16];
 910         int retval;
 911
 912         chip = (struct rts51x_chip *)us->extra;
 913         chip->support_auto_delink = 0;
 914         chip->pwr_state = US_RESUME;
 915         chip->lun_ready = 0;
 916         rts51x_set_stat(chip, RTS51X_STAT_INIT);
 917
 918         retval = rts51x_read_status(us, 0, buf, 16, &(chip->status_len));
 919         if (retval != STATUS_SUCCESS) {
 920                 US_DEBUGP("Read status fail\n");
 921                 return -EIO;
 922         }
 923         status = chip->status;
 924         status->vid = ((u16) buf[0] << 8) | buf[1];
 925         status->pid = ((u16) buf[2] << 8) | buf[3];
 926         status->cur_lun = buf[4];
 927         status->card_type = buf[5];
 928         status->total_lun = buf[6];
 929         status->fw_ver = ((u16) buf[7] << 8) | buf[8];
 930         status->phy_exist = buf[9];
 931         status->multi_flag = buf[10];
 932         status->multi_card = buf[11];
 933         status->log_exist = buf[12];
 934         if (chip->status_len == 16) {
 935                 status->detailed_type.detailed_type1 = buf[13];
 936                 status->function[0] = buf[14];
 937                 status->function[1] = buf[15];
 938         }
 939
 940         /* back up the proto_handler in us->extra */
 941         chip = (struct rts51x_chip *)(us->extra);
 942         chip->proto_handler_backup = us->proto_handler;
 943         /* Set the autosuspend_delay to 0 */
 944         pm_runtime_set_autosuspend_delay(&us->pusb_dev->dev, 0);
 945         /* override us->proto_handler setted in get_protocol() */
 946         us->proto_handler = rts51x_invoke_transport;
 947
 948         chip->timer_expires = 0;
 949         setup_timer(&chip->rts51x_suspend_timer, rts51x_suspend_timer_fn,
 950                         (unsigned long)chip);
 951         fw5895_init(us);
 952
 953         /* enable autosuspend funciton of the usb device */
 954         usb_enable_autosuspend(us->pusb_dev);
 955
 956         return 0;
 957 }
 958 #endif
 959
 960 static void realtek_cr_destructor(void *extra)
 961 {
 962         struct rts51x_chip *chip = (struct rts51x_chip *)extra;
 963
 964         US_DEBUGP("%s: <---\n", __func__);
 965
 966         if (!chip)
 967                 return;
 968 #ifdef CONFIG_REALTEK_AUTOPM
 969         if (ss_en) {
 970                 del_timer(&chip->rts51x_suspend_timer);
 971                 chip->timer_expires = 0;
 972         }
 973 #endif
 974         kfree(chip->status);
 975 }
 976
 977 #ifdef CONFIG_PM
 978 static int realtek_cr_suspend(struct usb_interface *iface, pm_message_t message)
 979 {
 980         struct us_data *us = usb_get_intfdata(iface);
 981
 982         US_DEBUGP("%s: <---\n", __func__);
 983
 984         /* wait until no command is running */
 985         mutex_lock(&us->dev_mutex);
 986
 987         config_autodelink_before_power_down(us);
 988
 989         mutex_unlock(&us->dev_mutex);
 990
 991         US_DEBUGP("%s: --->\n", __func__);
 992
 993         return 0;
 994 }
 995
 996 static int realtek_cr_resume(struct usb_interface *iface)
 997 {
 998         struct us_data *us = usb_get_intfdata(iface);
 999
1000         US_DEBUGP("%s: <---\n", __func__);
1001
1002         fw5895_init(us);
1003         config_autodelink_after_power_on(us);
1004
1005         US_DEBUGP("%s: --->\n", __func__);
1006
1007         return 0;
1008 }
1009 #else
1010 #define realtek_cr_suspend      NULL
1011 #define realtek_cr_resume       NULL
1012 #endif
1013
1014 static int init_realtek_cr(struct us_data *us)
1015 {
1016         struct rts51x_chip *chip;
1017         int size, i, retval;
1018
1019         chip = kzalloc(sizeof(struct rts51x_chip), GFP_KERNEL);
1020         if (!chip)
1021                 return -ENOMEM;
1022
1023         us->extra = chip;
1024         us->extra_destructor = realtek_cr_destructor;
1025         us->max_lun = chip->max_lun = rts51x_get_max_lun(us);
1026
1027         US_DEBUGP("chip->max_lun = %d\n", chip->max_lun);
1028
1029         size = (chip->max_lun + 1) * sizeof(struct rts51x_status);
1030         chip->status = kzalloc(size, GFP_KERNEL);
1031         if (!chip->status)
1032                 goto INIT_FAIL;
1033
1034         for (i = 0; i <= (int)(chip->max_lun); i++) {
1035                 retval = rts51x_check_status(us, (u8) i);
1036                 if (retval < 0)
1037                         goto INIT_FAIL;
1038         }
1039
1040         if (CHECK_FW_VER(chip, 0x5888) || CHECK_FW_VER(chip, 0x5889) ||
1041             CHECK_FW_VER(chip, 0x5901))
1042                 SET_AUTO_DELINK(chip);
1043         if (STATUS_LEN(chip) == 16) {
1044                 if (SUPPORT_AUTO_DELINK(chip))
1045                         SET_AUTO_DELINK(chip);
1046         }
1047 #ifdef CONFIG_REALTEK_AUTOPM
1048         if (ss_en) {
1049                 chip->us = us;
1050                 realtek_cr_autosuspend_setup(us);
1051         }
1052 #endif
1053
1054         US_DEBUGP("chip->flag = 0x%x\n", chip->flag);
1055
1056         (void)config_autodelink_after_power_on(us);
1057
1058         return 0;
1059
1060 INIT_FAIL:
1061         if (us->extra) {
1062                 kfree(chip->status);
1063                 kfree(us->extra);
1064                 us->extra = NULL;
1065         }
1066
1067         return -EIO;
1068 }
1069
1070 static int realtek_cr_probe(struct usb_interface *intf,
1071                             const struct usb_device_id *id)
1072 {
1073         struct us_data *us;
1074         int result;
1075
1076         US_DEBUGP("Probe Realtek Card Reader!\n");
1077
1078         result = usb_stor_probe1(&us, intf, id,
1079                                  (id - realtek_cr_ids) +
1080                                  realtek_cr_unusual_dev_list);
1081         if (result)
1082                 return result;
1083
1084         result = usb_stor_probe2(us);
1085
1086         return result;
1087 }
1088
1089 static struct usb_driver realtek_cr_driver = {
1090         .name = "ums-realtek",
1091         .probe = realtek_cr_probe,
1092         .disconnect = usb_stor_disconnect,
1093         /* .suspend =      usb_stor_suspend, */
1094         /* .resume =       usb_stor_resume, */
1095         .reset_resume = usb_stor_reset_resume,
1096         .suspend = realtek_cr_suspend,
1097         .resume = realtek_cr_resume,
1098         .pre_reset = usb_stor_pre_reset,
1099         .post_reset = usb_stor_post_reset,
1100         .id_table = realtek_cr_ids,
1101         .soft_unbind = 1,
1102         .supports_autosuspend = 1,
1103 };
1104
1105 module_usb_driver(realtek_cr_driver);