1// SPDX-License-Identifier: GPL-2.0-or-later 2/* Realtek PCI-Express Memstick Card Interface driver 3 * 4 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved. 5 * 6 * Author: 7 * Wei WANG <wei_wang@realsil.com.cn> 8 */ 9 10#include <linux/module.h> 11#include <linux/highmem.h> 12#include <linux/delay.h> 13#include <linux/platform_device.h> 14#include <linux/memstick.h> 15#include <linux/rtsx_pci.h> 16#include <asm/unaligned.h> 17 18struct realtek_pci_ms { 19 struct platform_device *pdev; 20 struct rtsx_pcr *pcr; 21 struct memstick_host *msh; 22 struct memstick_request *req; 23 24 struct mutex host_mutex; 25 struct work_struct handle_req; 26 27 u8 ssc_depth; 28 unsigned int clock; 29 unsigned char ifmode; 30 bool eject; 31}; 32 33static inline struct device *ms_dev(struct realtek_pci_ms *host) 34{ 35 return &(host->pdev->dev); 36} 37 38static inline void ms_clear_error(struct realtek_pci_ms *host) 39{ 40 rtsx_pci_write_register(host->pcr, CARD_STOP, 41 MS_STOP | MS_CLR_ERR, MS_STOP | MS_CLR_ERR); 42} 43 44#ifdef DEBUG 45 46static void ms_print_debug_regs(struct realtek_pci_ms *host) 47{ 48 struct rtsx_pcr *pcr = host->pcr; 49 u16 i; 50 u8 *ptr; 51 52 /* Print MS host internal registers */ 53 rtsx_pci_init_cmd(pcr); 54 for (i = 0xFD40; i <= 0xFD44; i++) 55 rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0); 56 for (i = 0xFD52; i <= 0xFD69; i++) 57 rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0); 58 rtsx_pci_send_cmd(pcr, 100); 59 60 ptr = rtsx_pci_get_cmd_data(pcr); 61 for (i = 0xFD40; i <= 0xFD44; i++) 62 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++)); 63 for (i = 0xFD52; i <= 0xFD69; i++) 64 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++)); 65} 66 67#else 68 69#define ms_print_debug_regs(host) 70 71#endif 72 73static int ms_power_on(struct realtek_pci_ms *host) 74{ 75 struct rtsx_pcr *pcr = host->pcr; 76 int err; 77 78 rtsx_pci_init_cmd(pcr); 79 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, MS_MOD_SEL); 80 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE, 81 CARD_SHARE_MASK, CARD_SHARE_48_MS); 82 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, 83 MS_CLK_EN, MS_CLK_EN); 84 err = rtsx_pci_send_cmd(pcr, 100); 85 if (err < 0) 86 return err; 87 88 err = rtsx_pci_card_pull_ctl_enable(pcr, RTSX_MS_CARD); 89 if (err < 0) 90 return err; 91 92 err = rtsx_pci_card_power_on(pcr, RTSX_MS_CARD); 93 if (err < 0) 94 return err; 95 96 /* Wait ms power stable */ 97 msleep(150); 98 99 err = rtsx_pci_write_register(pcr, CARD_OE, 100 MS_OUTPUT_EN, MS_OUTPUT_EN); 101 if (err < 0) 102 return err; 103 104 return 0; 105} 106 107static int ms_power_off(struct realtek_pci_ms *host) 108{ 109 struct rtsx_pcr *pcr = host->pcr; 110 int err; 111 112 rtsx_pci_init_cmd(pcr); 113 114 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, MS_CLK_EN, 0); 115 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_OE, MS_OUTPUT_EN, 0); 116 117 err = rtsx_pci_send_cmd(pcr, 100); 118 if (err < 0) 119 return err; 120 121 err = rtsx_pci_card_power_off(pcr, RTSX_MS_CARD); 122 if (err < 0) 123 return err; 124 125 return rtsx_pci_card_pull_ctl_disable(pcr, RTSX_MS_CARD); 126} 127 128static int ms_transfer_data(struct realtek_pci_ms *host, unsigned char data_dir, 129 u8 tpc, u8 cfg, struct scatterlist *sg) 130{ 131 struct rtsx_pcr *pcr = host->pcr; 132 int err; 133 unsigned int length = sg->length; 134 u16 sec_cnt = (u16)(length / 512); 135 u8 val, trans_mode, dma_dir; 136 struct memstick_dev *card = host->msh->card; 137 bool pro_card = card->id.type == MEMSTICK_TYPE_PRO; 138 139 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x, data_dir = %s, length = %d\n", 140 __func__, tpc, (data_dir == READ) ? "READ" : "WRITE", 141 length); 142 143 if (data_dir == READ) { 144 dma_dir = DMA_DIR_FROM_CARD; 145 trans_mode = pro_card ? MS_TM_AUTO_READ : MS_TM_NORMAL_READ; 146 } else { 147 dma_dir = DMA_DIR_TO_CARD; 148 trans_mode = pro_card ? MS_TM_AUTO_WRITE : MS_TM_NORMAL_WRITE; 149 } 150 151 rtsx_pci_init_cmd(pcr); 152 153 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc); 154 if (pro_card) { 155 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_SECTOR_CNT_H, 156 0xFF, (u8)(sec_cnt >> 8)); 157 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_SECTOR_CNT_L, 158 0xFF, (u8)sec_cnt); 159 } 160 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg); 161 162 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0, 163 DMA_DONE_INT, DMA_DONE_INT); 164 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3, 0xFF, (u8)(length >> 24)); 165 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2, 0xFF, (u8)(length >> 16)); 166 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1, 0xFF, (u8)(length >> 8)); 167 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)length); 168 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL, 169 0x03 | DMA_PACK_SIZE_MASK, dma_dir | DMA_EN | DMA_512); 170 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE, 171 0x01, RING_BUFFER); 172 173 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANSFER, 174 0xFF, MS_TRANSFER_START | trans_mode); 175 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, MS_TRANSFER, 176 MS_TRANSFER_END, MS_TRANSFER_END); 177 178 rtsx_pci_send_cmd_no_wait(pcr); 179 180 err = rtsx_pci_transfer_data(pcr, sg, 1, data_dir == READ, 10000); 181 if (err < 0) { 182 ms_clear_error(host); 183 return err; 184 } 185 186 rtsx_pci_read_register(pcr, MS_TRANS_CFG, &val); 187 if (pro_card) { 188 if (val & (MS_INT_CMDNK | MS_INT_ERR | 189 MS_CRC16_ERR | MS_RDY_TIMEOUT)) 190 return -EIO; 191 } else { 192 if (val & (MS_CRC16_ERR | MS_RDY_TIMEOUT)) 193 return -EIO; 194 } 195 196 return 0; 197} 198 199static int ms_write_bytes(struct realtek_pci_ms *host, u8 tpc, 200 u8 cfg, u8 cnt, u8 *data, u8 *int_reg) 201{ 202 struct rtsx_pcr *pcr = host->pcr; 203 int err, i; 204 205 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc); 206 207 if (!data) 208 return -EINVAL; 209 210 rtsx_pci_init_cmd(pcr); 211 212 for (i = 0; i < cnt; i++) 213 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, 214 PPBUF_BASE2 + i, 0xFF, data[i]); 215 if (cnt % 2) 216 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, 217 PPBUF_BASE2 + i, 0xFF, 0xFF); 218 219 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc); 220 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt); 221 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg); 222 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE, 223 0x01, PINGPONG_BUFFER); 224 225 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANSFER, 226 0xFF, MS_TRANSFER_START | MS_TM_WRITE_BYTES); 227 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, MS_TRANSFER, 228 MS_TRANSFER_END, MS_TRANSFER_END); 229 if (int_reg) 230 rtsx_pci_add_cmd(pcr, READ_REG_CMD, MS_TRANS_CFG, 0, 0); 231 232 err = rtsx_pci_send_cmd(pcr, 5000); 233 if (err < 0) { 234 u8 val; 235 236 rtsx_pci_read_register(pcr, MS_TRANS_CFG, &val); 237 dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val); 238 239 if (int_reg) 240 *int_reg = val & 0x0F; 241 242 ms_print_debug_regs(host); 243 244 ms_clear_error(host); 245 246 if (!(tpc & 0x08)) { 247 if (val & MS_CRC16_ERR) 248 return -EIO; 249 } else { 250 if (!(val & 0x80)) { 251 if (val & (MS_INT_ERR | MS_INT_CMDNK)) 252 return -EIO; 253 } 254 } 255 256 return -ETIMEDOUT; 257 } 258 259 if (int_reg) { 260 u8 *ptr = rtsx_pci_get_cmd_data(pcr) + 1; 261 *int_reg = *ptr & 0x0F; 262 } 263 264 return 0; 265} 266 267static int ms_read_bytes(struct realtek_pci_ms *host, u8 tpc, 268 u8 cfg, u8 cnt, u8 *data, u8 *int_reg) 269{ 270 struct rtsx_pcr *pcr = host->pcr; 271 int err, i; 272 u8 *ptr; 273 274 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc); 275 276 if (!data) 277 return -EINVAL; 278 279 rtsx_pci_init_cmd(pcr); 280 281 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc); 282 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt); 283 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg); 284 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE, 285 0x01, PINGPONG_BUFFER); 286 287 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANSFER, 288 0xFF, MS_TRANSFER_START | MS_TM_READ_BYTES); 289 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, MS_TRANSFER, 290 MS_TRANSFER_END, MS_TRANSFER_END); 291 for (i = 0; i < cnt - 1; i++) 292 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PPBUF_BASE2 + i, 0, 0); 293 if (cnt % 2) 294 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PPBUF_BASE2 + cnt, 0, 0); 295 else 296 rtsx_pci_add_cmd(pcr, READ_REG_CMD, 297 PPBUF_BASE2 + cnt - 1, 0, 0); 298 if (int_reg) 299 rtsx_pci_add_cmd(pcr, READ_REG_CMD, MS_TRANS_CFG, 0, 0); 300 301 err = rtsx_pci_send_cmd(pcr, 5000); 302 if (err < 0) { 303 u8 val; 304 305 rtsx_pci_read_register(pcr, MS_TRANS_CFG, &val); 306 dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val); 307 308 if (int_reg) 309 *int_reg = val & 0x0F; 310 311 ms_print_debug_regs(host); 312 313 ms_clear_error(host); 314 315 if (!(tpc & 0x08)) { 316 if (val & MS_CRC16_ERR) 317 return -EIO; 318 } else { 319 if (!(val & 0x80)) { 320 if (val & (MS_INT_ERR | MS_INT_CMDNK)) 321 return -EIO; 322 } 323 } 324 325 return -ETIMEDOUT; 326 } 327 328 ptr = rtsx_pci_get_cmd_data(pcr) + 1; 329 for (i = 0; i < cnt; i++) 330 data[i] = *ptr++; 331 332 if (int_reg) 333 *int_reg = *ptr & 0x0F; 334 335 return 0; 336} 337 338static int rtsx_pci_ms_issue_cmd(struct realtek_pci_ms *host) 339{ 340 struct memstick_request *req = host->req; 341 int err = 0; 342 u8 cfg = 0, int_reg; 343 344 dev_dbg(ms_dev(host), "%s\n", __func__); 345 346 if (req->need_card_int) { 347 if (host->ifmode != MEMSTICK_SERIAL) 348 cfg = WAIT_INT; 349 } 350 351 if (req->long_data) { 352 err = ms_transfer_data(host, req->data_dir, 353 req->tpc, cfg, &(req->sg)); 354 } else { 355 if (req->data_dir == READ) { 356 err = ms_read_bytes(host, req->tpc, cfg, 357 req->data_len, req->data, &int_reg); 358 } else { 359 err = ms_write_bytes(host, req->tpc, cfg, 360 req->data_len, req->data, &int_reg); 361 } 362 } 363 if (err < 0) 364 return err; 365 366 if (req->need_card_int && (host->ifmode == MEMSTICK_SERIAL)) { 367 err = ms_read_bytes(host, MS_TPC_GET_INT, 368 NO_WAIT_INT, 1, &int_reg, NULL); 369 if (err < 0) 370 return err; 371 } 372 373 if (req->need_card_int) { 374 dev_dbg(ms_dev(host), "int_reg: 0x%02x\n", int_reg); 375 376 if (int_reg & MS_INT_CMDNK) 377 req->int_reg |= MEMSTICK_INT_CMDNAK; 378 if (int_reg & MS_INT_BREQ) 379 req->int_reg |= MEMSTICK_INT_BREQ; 380 if (int_reg & MS_INT_ERR) 381 req->int_reg |= MEMSTICK_INT_ERR; 382 if (int_reg & MS_INT_CED) 383 req->int_reg |= MEMSTICK_INT_CED; 384 } 385 386 return 0; 387} 388 389static void rtsx_pci_ms_handle_req(struct work_struct *work) 390{ 391 struct realtek_pci_ms *host = container_of(work, 392 struct realtek_pci_ms, handle_req); 393 struct rtsx_pcr *pcr = host->pcr; 394 struct memstick_host *msh = host->msh; 395 int rc; 396 397 mutex_lock(&pcr->pcr_mutex); 398 399 rtsx_pci_start_run(pcr); 400 401 rtsx_pci_switch_clock(host->pcr, host->clock, host->ssc_depth, 402 false, true, false); 403 rtsx_pci_write_register(pcr, CARD_SELECT, 0x07, MS_MOD_SEL); 404 rtsx_pci_write_register(pcr, CARD_SHARE_MODE, 405 CARD_SHARE_MASK, CARD_SHARE_48_MS); 406 407 if (!host->req) { 408 do { 409 rc = memstick_next_req(msh, &host->req); 410 dev_dbg(ms_dev(host), "next req %d\n", rc); 411 412 if (!rc) 413 host->req->error = rtsx_pci_ms_issue_cmd(host); 414 } while (!rc); 415 } 416 417 mutex_unlock(&pcr->pcr_mutex); 418} 419 420static void rtsx_pci_ms_request(struct memstick_host *msh) 421{ 422 struct realtek_pci_ms *host = memstick_priv(msh); 423 424 dev_dbg(ms_dev(host), "--> %s\n", __func__); 425 426 if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_MS_CARD)) 427 return; 428 429 schedule_work(&host->handle_req); 430} 431 432static int rtsx_pci_ms_set_param(struct memstick_host *msh, 433 enum memstick_param param, int value) 434{ 435 struct realtek_pci_ms *host = memstick_priv(msh); 436 struct rtsx_pcr *pcr = host->pcr; 437 unsigned int clock = 0; 438 u8 ssc_depth = 0; 439 int err; 440 441 dev_dbg(ms_dev(host), "%s: param = %d, value = %d\n", 442 __func__, param, value); 443 444 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_MS_CARD); 445 if (err) 446 return err; 447 448 switch (param) { 449 case MEMSTICK_POWER: 450 if (value == MEMSTICK_POWER_ON) 451 err = ms_power_on(host); 452 else if (value == MEMSTICK_POWER_OFF) 453 err = ms_power_off(host); 454 else 455 return -EINVAL; 456 break; 457 458 case MEMSTICK_INTERFACE: 459 if (value == MEMSTICK_SERIAL) { 460 clock = 19000000; 461 ssc_depth = RTSX_SSC_DEPTH_500K; 462 463 err = rtsx_pci_write_register(pcr, MS_CFG, 0x58, 464 MS_BUS_WIDTH_1 | PUSH_TIME_DEFAULT); 465 if (err < 0) 466 return err; 467 } else if (value == MEMSTICK_PAR4) { 468 clock = 39000000; 469 ssc_depth = RTSX_SSC_DEPTH_1M; 470 471 err = rtsx_pci_write_register(pcr, MS_CFG, 472 0x58, MS_BUS_WIDTH_4 | PUSH_TIME_ODD); 473 if (err < 0) 474 return err; 475 } else { 476 return -EINVAL; 477 } 478 479 err = rtsx_pci_switch_clock(pcr, clock, 480 ssc_depth, false, true, false); 481 if (err < 0) 482 return err; 483 484 host->ssc_depth = ssc_depth; 485 host->clock = clock; 486 host->ifmode = value; 487 break; 488 } 489 490 return 0; 491} 492 493#ifdef CONFIG_PM 494 495static int rtsx_pci_ms_suspend(struct platform_device *pdev, pm_message_t state) 496{ 497 struct realtek_pci_ms *host = platform_get_drvdata(pdev); 498 struct memstick_host *msh = host->msh; 499 500 dev_dbg(ms_dev(host), "--> %s\n", __func__); 501 502 memstick_suspend_host(msh); 503 return 0; 504} 505 506static int rtsx_pci_ms_resume(struct platform_device *pdev) 507{ 508 struct realtek_pci_ms *host = platform_get_drvdata(pdev); 509 struct memstick_host *msh = host->msh; 510 511 dev_dbg(ms_dev(host), "--> %s\n", __func__); 512 513 memstick_resume_host(msh); 514 return 0; 515} 516 517#else /* CONFIG_PM */ 518 519#define rtsx_pci_ms_suspend NULL 520#define rtsx_pci_ms_resume NULL 521 522#endif /* CONFIG_PM */ 523 524static void rtsx_pci_ms_card_event(struct platform_device *pdev) 525{ 526 struct realtek_pci_ms *host = platform_get_drvdata(pdev); 527 528 memstick_detect_change(host->msh); 529} 530 531static int rtsx_pci_ms_drv_probe(struct platform_device *pdev) 532{ 533 struct memstick_host *msh; 534 struct realtek_pci_ms *host; 535 struct rtsx_pcr *pcr; 536 struct pcr_handle *handle = pdev->dev.platform_data; 537 int rc; 538 539 if (!handle) 540 return -ENXIO; 541 542 pcr = handle->pcr; 543 if (!pcr) 544 return -ENXIO; 545 546 dev_dbg(&(pdev->dev), 547 ": Realtek PCI-E Memstick controller found\n"); 548 549 msh = memstick_alloc_host(sizeof(*host), &pdev->dev); 550 if (!msh) 551 return -ENOMEM; 552 553 host = memstick_priv(msh); 554 host->pcr = pcr; 555 host->msh = msh; 556 host->pdev = pdev; 557 platform_set_drvdata(pdev, host); 558 pcr->slots[RTSX_MS_CARD].p_dev = pdev; 559 pcr->slots[RTSX_MS_CARD].card_event = rtsx_pci_ms_card_event; 560 561 mutex_init(&host->host_mutex); 562 563 INIT_WORK(&host->handle_req, rtsx_pci_ms_handle_req); 564 msh->request = rtsx_pci_ms_request; 565 msh->set_param = rtsx_pci_ms_set_param; 566 msh->caps = MEMSTICK_CAP_PAR4; 567 568 rc = memstick_add_host(msh); 569 if (rc) { 570 memstick_free_host(msh); 571 return rc; 572 } 573 574 return 0; 575} 576 577static int rtsx_pci_ms_drv_remove(struct platform_device *pdev) 578{ 579 struct realtek_pci_ms *host = platform_get_drvdata(pdev); 580 struct rtsx_pcr *pcr; 581 struct memstick_host *msh; 582 int rc; 583 584 if (!host) 585 return 0; 586 587 pcr = host->pcr; 588 pcr->slots[RTSX_MS_CARD].p_dev = NULL; 589 pcr->slots[RTSX_MS_CARD].card_event = NULL; 590 msh = host->msh; 591 host->eject = true; 592 cancel_work_sync(&host->handle_req); 593 594 mutex_lock(&host->host_mutex); 595 if (host->req) { 596 dev_dbg(&(pdev->dev), 597 "%s: Controller removed during transfer\n", 598 dev_name(&msh->dev)); 599 600 rtsx_pci_complete_unfinished_transfer(pcr); 601 602 host->req->error = -ENOMEDIUM; 603 do { 604 rc = memstick_next_req(msh, &host->req); 605 if (!rc) 606 host->req->error = -ENOMEDIUM; 607 } while (!rc); 608 } 609 mutex_unlock(&host->host_mutex); 610 611 memstick_remove_host(msh); 612 memstick_free_host(msh); 613 614 dev_dbg(&(pdev->dev), 615 ": Realtek PCI-E Memstick controller has been removed\n"); 616 617 return 0; 618} 619 620static struct platform_device_id rtsx_pci_ms_ids[] = { 621 { 622 .name = DRV_NAME_RTSX_PCI_MS, 623 }, { 624 /* sentinel */ 625 } 626}; 627MODULE_DEVICE_TABLE(platform, rtsx_pci_ms_ids); 628 629static struct platform_driver rtsx_pci_ms_driver = { 630 .probe = rtsx_pci_ms_drv_probe, 631 .remove = rtsx_pci_ms_drv_remove, 632 .id_table = rtsx_pci_ms_ids, 633 .suspend = rtsx_pci_ms_suspend, 634 .resume = rtsx_pci_ms_resume, 635 .driver = { 636 .name = DRV_NAME_RTSX_PCI_MS, 637 }, 638}; 639module_platform_driver(rtsx_pci_ms_driver); 640 641MODULE_LICENSE("GPL"); 642MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>"); 643MODULE_DESCRIPTION("Realtek PCI-E Memstick Card Host Driver"); 644