1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Driver for Realtek USB card reader 3 * 4 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved. 5 * 6 * Author: 7 * Roger Tseng <rogerable@realtek.com> 8 */ 9 #include <linux/module.h> 10 #include <linux/slab.h> 11 #include <linux/mutex.h> 12 #include <linux/usb.h> 13 #include <linux/platform_device.h> 14 #include <linux/mfd/core.h> 15 #include <linux/rtsx_usb.h> 16 17 static int polling_pipe = 1; 18 module_param(polling_pipe, int, S_IRUGO | S_IWUSR); 19 MODULE_PARM_DESC(polling_pipe, "polling pipe (0: ctl, 1: bulk)"); 20 21 static const struct mfd_cell rtsx_usb_cells[] = { 22 [RTSX_USB_SD_CARD] = { 23 .name = DRV_NAME_RTSX_USB_SDMMC, 24 .pdata_size = 0, 25 }, 26 [RTSX_USB_MS_CARD] = { 27 .name = DRV_NAME_RTSX_USB_MS, 28 .pdata_size = 0, 29 }, 30 }; 31 32 static void rtsx_usb_sg_timed_out(struct timer_list *t) 33 { 34 struct rtsx_ucr *ucr = from_timer(ucr, t, sg_timer); 35 36 dev_dbg(&ucr->pusb_intf->dev, "%s: sg transfer timed out", __func__); 37 usb_sg_cancel(&ucr->current_sg); 38 } 39 40 static int rtsx_usb_bulk_transfer_sglist(struct rtsx_ucr *ucr, 41 unsigned int pipe, struct scatterlist *sg, int num_sg, 42 unsigned int length, unsigned int *act_len, int timeout) 43 { 44 int ret; 45 46 dev_dbg(&ucr->pusb_intf->dev, "%s: xfer %u bytes, %d entries\n", 47 __func__, length, num_sg); 48 ret = usb_sg_init(&ucr->current_sg, ucr->pusb_dev, pipe, 0, 49 sg, num_sg, length, GFP_NOIO); 50 if (ret) 51 return ret; 52 53 ucr->sg_timer.expires = jiffies + msecs_to_jiffies(timeout); 54 add_timer(&ucr->sg_timer); 55 usb_sg_wait(&ucr->current_sg); 56 if (!del_timer_sync(&ucr->sg_timer)) 57 ret = -ETIMEDOUT; 58 else 59 ret = ucr->current_sg.status; 60 61 if (act_len) 62 *act_len = ucr->current_sg.bytes; 63 64 return ret; 65 } 66 67 int rtsx_usb_transfer_data(struct rtsx_ucr *ucr, unsigned int pipe, 68 void *buf, unsigned int len, int num_sg, 69 unsigned int *act_len, int timeout) 70 { 71 if (timeout < 600) 72 timeout = 600; 73 74 if (num_sg) 75 return rtsx_usb_bulk_transfer_sglist(ucr, pipe, 76 (struct scatterlist *)buf, num_sg, len, act_len, 77 timeout); 78 else 79 return usb_bulk_msg(ucr->pusb_dev, pipe, buf, len, act_len, 80 timeout); 81 } 82 EXPORT_SYMBOL_GPL(rtsx_usb_transfer_data); 83 84 static inline void rtsx_usb_seq_cmd_hdr(struct rtsx_ucr *ucr, 85 u16 addr, u16 len, u8 seq_type) 86 { 87 rtsx_usb_cmd_hdr_tag(ucr); 88 89 ucr->cmd_buf[PACKET_TYPE] = seq_type; 90 ucr->cmd_buf[5] = (u8)(len >> 8); 91 ucr->cmd_buf[6] = (u8)len; 92 ucr->cmd_buf[8] = (u8)(addr >> 8); 93 ucr->cmd_buf[9] = (u8)addr; 94 95 if (seq_type == SEQ_WRITE) 96 ucr->cmd_buf[STAGE_FLAG] = 0; 97 else 98 ucr->cmd_buf[STAGE_FLAG] = STAGE_R; 99 } 100 101 static int rtsx_usb_seq_write_register(struct rtsx_ucr *ucr, 102 u16 addr, u16 len, u8 *data) 103 { 104 u16 cmd_len = ALIGN(SEQ_WRITE_DATA_OFFSET + len, 4); 105 106 if (!data) 107 return -EINVAL; 108 109 if (cmd_len > IOBUF_SIZE) 110 return -EINVAL; 111 112 rtsx_usb_seq_cmd_hdr(ucr, addr, len, SEQ_WRITE); 113 memcpy(ucr->cmd_buf + SEQ_WRITE_DATA_OFFSET, data, len); 114 115 return rtsx_usb_transfer_data(ucr, 116 usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT), 117 ucr->cmd_buf, cmd_len, 0, NULL, 100); 118 } 119 120 static int rtsx_usb_seq_read_register(struct rtsx_ucr *ucr, 121 u16 addr, u16 len, u8 *data) 122 { 123 int i, ret; 124 u16 rsp_len = round_down(len, 4); 125 u16 res_len = len - rsp_len; 126 127 if (!data) 128 return -EINVAL; 129 130 /* 4-byte aligned part */ 131 if (rsp_len) { 132 rtsx_usb_seq_cmd_hdr(ucr, addr, len, SEQ_READ); 133 ret = rtsx_usb_transfer_data(ucr, 134 usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT), 135 ucr->cmd_buf, 12, 0, NULL, 100); 136 if (ret) 137 return ret; 138 139 ret = rtsx_usb_transfer_data(ucr, 140 usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN), 141 data, rsp_len, 0, NULL, 100); 142 if (ret) 143 return ret; 144 } 145 146 /* unaligned part */ 147 for (i = 0; i < res_len; i++) { 148 ret = rtsx_usb_read_register(ucr, addr + rsp_len + i, 149 data + rsp_len + i); 150 if (ret) 151 return ret; 152 } 153 154 return 0; 155 } 156 157 int rtsx_usb_read_ppbuf(struct rtsx_ucr *ucr, u8 *buf, int buf_len) 158 { 159 return rtsx_usb_seq_read_register(ucr, PPBUF_BASE2, (u16)buf_len, buf); 160 } 161 EXPORT_SYMBOL_GPL(rtsx_usb_read_ppbuf); 162 163 int rtsx_usb_write_ppbuf(struct rtsx_ucr *ucr, u8 *buf, int buf_len) 164 { 165 return rtsx_usb_seq_write_register(ucr, PPBUF_BASE2, (u16)buf_len, buf); 166 } 167 EXPORT_SYMBOL_GPL(rtsx_usb_write_ppbuf); 168 169 int rtsx_usb_ep0_write_register(struct rtsx_ucr *ucr, u16 addr, 170 u8 mask, u8 data) 171 { 172 u16 value, index; 173 174 addr |= EP0_WRITE_REG_CMD << EP0_OP_SHIFT; 175 value = swab16(addr); 176 index = mask | data << 8; 177 178 return usb_control_msg(ucr->pusb_dev, 179 usb_sndctrlpipe(ucr->pusb_dev, 0), RTSX_USB_REQ_REG_OP, 180 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 181 value, index, NULL, 0, 100); 182 } 183 EXPORT_SYMBOL_GPL(rtsx_usb_ep0_write_register); 184 185 int rtsx_usb_ep0_read_register(struct rtsx_ucr *ucr, u16 addr, u8 *data) 186 { 187 u16 value; 188 u8 *buf; 189 int ret; 190 191 if (!data) 192 return -EINVAL; 193 194 buf = kzalloc(sizeof(u8), GFP_KERNEL); 195 if (!buf) 196 return -ENOMEM; 197 198 addr |= EP0_READ_REG_CMD << EP0_OP_SHIFT; 199 value = swab16(addr); 200 201 ret = usb_control_msg(ucr->pusb_dev, 202 usb_rcvctrlpipe(ucr->pusb_dev, 0), RTSX_USB_REQ_REG_OP, 203 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 204 value, 0, buf, 1, 100); 205 *data = *buf; 206 207 kfree(buf); 208 return ret; 209 } 210 EXPORT_SYMBOL_GPL(rtsx_usb_ep0_read_register); 211 212 void rtsx_usb_add_cmd(struct rtsx_ucr *ucr, u8 cmd_type, u16 reg_addr, 213 u8 mask, u8 data) 214 { 215 int i; 216 217 if (ucr->cmd_idx < (IOBUF_SIZE - CMD_OFFSET) / 4) { 218 i = CMD_OFFSET + ucr->cmd_idx * 4; 219 220 ucr->cmd_buf[i++] = ((cmd_type & 0x03) << 6) | 221 (u8)((reg_addr >> 8) & 0x3F); 222 ucr->cmd_buf[i++] = (u8)reg_addr; 223 ucr->cmd_buf[i++] = mask; 224 ucr->cmd_buf[i++] = data; 225 226 ucr->cmd_idx++; 227 } 228 } 229 EXPORT_SYMBOL_GPL(rtsx_usb_add_cmd); 230 231 int rtsx_usb_send_cmd(struct rtsx_ucr *ucr, u8 flag, int timeout) 232 { 233 int ret; 234 235 ucr->cmd_buf[CNT_H] = (u8)(ucr->cmd_idx >> 8); 236 ucr->cmd_buf[CNT_L] = (u8)(ucr->cmd_idx); 237 ucr->cmd_buf[STAGE_FLAG] = flag; 238 239 ret = rtsx_usb_transfer_data(ucr, 240 usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT), 241 ucr->cmd_buf, ucr->cmd_idx * 4 + CMD_OFFSET, 242 0, NULL, timeout); 243 if (ret) { 244 rtsx_usb_clear_fsm_err(ucr); 245 return ret; 246 } 247 248 return 0; 249 } 250 EXPORT_SYMBOL_GPL(rtsx_usb_send_cmd); 251 252 int rtsx_usb_get_rsp(struct rtsx_ucr *ucr, int rsp_len, int timeout) 253 { 254 if (rsp_len <= 0) 255 return -EINVAL; 256 257 rsp_len = ALIGN(rsp_len, 4); 258 259 return rtsx_usb_transfer_data(ucr, 260 usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN), 261 ucr->rsp_buf, rsp_len, 0, NULL, timeout); 262 } 263 EXPORT_SYMBOL_GPL(rtsx_usb_get_rsp); 264 265 static int rtsx_usb_get_status_with_bulk(struct rtsx_ucr *ucr, u16 *status) 266 { 267 int ret; 268 269 rtsx_usb_init_cmd(ucr); 270 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_EXIST, 0x00, 0x00); 271 rtsx_usb_add_cmd(ucr, READ_REG_CMD, OCPSTAT, 0x00, 0x00); 272 ret = rtsx_usb_send_cmd(ucr, MODE_CR, 100); 273 if (ret) 274 return ret; 275 276 ret = rtsx_usb_get_rsp(ucr, 2, 100); 277 if (ret) 278 return ret; 279 280 *status = ((ucr->rsp_buf[0] >> 2) & 0x0f) | 281 ((ucr->rsp_buf[1] & 0x03) << 4); 282 283 return 0; 284 } 285 286 int rtsx_usb_get_card_status(struct rtsx_ucr *ucr, u16 *status) 287 { 288 int ret; 289 u8 interrupt_val = 0; 290 u16 *buf; 291 292 if (!status) 293 return -EINVAL; 294 295 if (polling_pipe == 0) { 296 buf = kzalloc(sizeof(u16), GFP_KERNEL); 297 if (!buf) 298 return -ENOMEM; 299 300 ret = usb_control_msg(ucr->pusb_dev, 301 usb_rcvctrlpipe(ucr->pusb_dev, 0), 302 RTSX_USB_REQ_POLL, 303 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 304 0, 0, buf, 2, 100); 305 *status = *buf; 306 307 kfree(buf); 308 } else { 309 ret = rtsx_usb_get_status_with_bulk(ucr, status); 310 } 311 312 rtsx_usb_read_register(ucr, CARD_INT_PEND, &interrupt_val); 313 /* Cross check presence with interrupts */ 314 if (*status & XD_CD) 315 if (!(interrupt_val & XD_INT)) 316 *status &= ~XD_CD; 317 318 if (*status & SD_CD) 319 if (!(interrupt_val & SD_INT)) 320 *status &= ~SD_CD; 321 322 if (*status & MS_CD) 323 if (!(interrupt_val & MS_INT)) 324 *status &= ~MS_CD; 325 326 /* usb_control_msg may return positive when success */ 327 if (ret < 0) 328 return ret; 329 330 return 0; 331 } 332 EXPORT_SYMBOL_GPL(rtsx_usb_get_card_status); 333 334 static int rtsx_usb_write_phy_register(struct rtsx_ucr *ucr, u8 addr, u8 val) 335 { 336 dev_dbg(&ucr->pusb_intf->dev, "Write 0x%x to phy register 0x%x\n", 337 val, addr); 338 339 rtsx_usb_init_cmd(ucr); 340 341 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VSTAIN, 0xFF, val); 342 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VCONTROL, 0xFF, addr & 0x0F); 343 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); 344 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); 345 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x01); 346 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VCONTROL, 347 0xFF, (addr >> 4) & 0x0F); 348 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); 349 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); 350 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x01); 351 352 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 353 } 354 355 int rtsx_usb_write_register(struct rtsx_ucr *ucr, u16 addr, u8 mask, u8 data) 356 { 357 rtsx_usb_init_cmd(ucr); 358 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, addr, mask, data); 359 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 360 } 361 EXPORT_SYMBOL_GPL(rtsx_usb_write_register); 362 363 int rtsx_usb_read_register(struct rtsx_ucr *ucr, u16 addr, u8 *data) 364 { 365 int ret; 366 367 if (data != NULL) 368 *data = 0; 369 370 rtsx_usb_init_cmd(ucr); 371 rtsx_usb_add_cmd(ucr, READ_REG_CMD, addr, 0, 0); 372 ret = rtsx_usb_send_cmd(ucr, MODE_CR, 100); 373 if (ret) 374 return ret; 375 376 ret = rtsx_usb_get_rsp(ucr, 1, 100); 377 if (ret) 378 return ret; 379 380 if (data != NULL) 381 *data = ucr->rsp_buf[0]; 382 383 return 0; 384 } 385 EXPORT_SYMBOL_GPL(rtsx_usb_read_register); 386 387 static inline u8 double_ssc_depth(u8 depth) 388 { 389 return (depth > 1) ? (depth - 1) : depth; 390 } 391 392 static u8 revise_ssc_depth(u8 ssc_depth, u8 div) 393 { 394 if (div > CLK_DIV_1) { 395 if (ssc_depth > div - 1) 396 ssc_depth -= (div - 1); 397 else 398 ssc_depth = SSC_DEPTH_2M; 399 } 400 401 return ssc_depth; 402 } 403 404 int rtsx_usb_switch_clock(struct rtsx_ucr *ucr, unsigned int card_clock, 405 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk) 406 { 407 int ret; 408 u8 n, clk_divider, mcu_cnt, div; 409 410 if (!card_clock) { 411 ucr->cur_clk = 0; 412 return 0; 413 } 414 415 if (initial_mode) { 416 /* We use 250k(around) here, in initial stage */ 417 clk_divider = SD_CLK_DIVIDE_128; 418 card_clock = 30000000; 419 } else { 420 clk_divider = SD_CLK_DIVIDE_0; 421 } 422 423 ret = rtsx_usb_write_register(ucr, SD_CFG1, 424 SD_CLK_DIVIDE_MASK, clk_divider); 425 if (ret < 0) 426 return ret; 427 428 card_clock /= 1000000; 429 dev_dbg(&ucr->pusb_intf->dev, 430 "Switch card clock to %dMHz\n", card_clock); 431 432 if (!initial_mode && double_clk) 433 card_clock *= 2; 434 dev_dbg(&ucr->pusb_intf->dev, 435 "Internal SSC clock: %dMHz (cur_clk = %d)\n", 436 card_clock, ucr->cur_clk); 437 438 if (card_clock == ucr->cur_clk) 439 return 0; 440 441 /* Converting clock value into internal settings: n and div */ 442 n = card_clock - 2; 443 if ((card_clock <= 2) || (n > MAX_DIV_N)) 444 return -EINVAL; 445 446 mcu_cnt = 60/card_clock + 3; 447 if (mcu_cnt > 15) 448 mcu_cnt = 15; 449 450 /* Make sure that the SSC clock div_n is not less than MIN_DIV_N */ 451 452 div = CLK_DIV_1; 453 while (n < MIN_DIV_N && div < CLK_DIV_4) { 454 n = (n + 2) * 2 - 2; 455 div++; 456 } 457 dev_dbg(&ucr->pusb_intf->dev, "n = %d, div = %d\n", n, div); 458 459 if (double_clk) 460 ssc_depth = double_ssc_depth(ssc_depth); 461 462 ssc_depth = revise_ssc_depth(ssc_depth, div); 463 dev_dbg(&ucr->pusb_intf->dev, "ssc_depth = %d\n", ssc_depth); 464 465 rtsx_usb_init_cmd(ucr); 466 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE); 467 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, 468 0x3F, (div << 4) | mcu_cnt); 469 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0); 470 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL2, 471 SSC_DEPTH_MASK, ssc_depth); 472 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n); 473 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB); 474 if (vpclk) { 475 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, 476 PHASE_NOT_RESET, 0); 477 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, 478 PHASE_NOT_RESET, PHASE_NOT_RESET); 479 } 480 481 ret = rtsx_usb_send_cmd(ucr, MODE_C, 2000); 482 if (ret < 0) 483 return ret; 484 485 ret = rtsx_usb_write_register(ucr, SSC_CTL1, 0xff, 486 SSC_RSTB | SSC_8X_EN | SSC_SEL_4M); 487 if (ret < 0) 488 return ret; 489 490 /* Wait SSC clock stable */ 491 usleep_range(100, 1000); 492 493 ret = rtsx_usb_write_register(ucr, CLK_DIV, CLK_CHANGE, 0); 494 if (ret < 0) 495 return ret; 496 497 ucr->cur_clk = card_clock; 498 499 return 0; 500 } 501 EXPORT_SYMBOL_GPL(rtsx_usb_switch_clock); 502 503 int rtsx_usb_card_exclusive_check(struct rtsx_ucr *ucr, int card) 504 { 505 int ret; 506 u16 val; 507 u16 cd_mask[] = { 508 [RTSX_USB_SD_CARD] = (CD_MASK & ~SD_CD), 509 [RTSX_USB_MS_CARD] = (CD_MASK & ~MS_CD) 510 }; 511 512 ret = rtsx_usb_get_card_status(ucr, &val); 513 /* 514 * If get status fails, return 0 (ok) for the exclusive check 515 * and let the flow fail at somewhere else. 516 */ 517 if (ret) 518 return 0; 519 520 if (val & cd_mask[card]) 521 return -EIO; 522 523 return 0; 524 } 525 EXPORT_SYMBOL_GPL(rtsx_usb_card_exclusive_check); 526 527 static int rtsx_usb_reset_chip(struct rtsx_ucr *ucr) 528 { 529 int ret; 530 u8 val; 531 532 rtsx_usb_init_cmd(ucr); 533 534 if (CHECK_PKG(ucr, LQFP48)) { 535 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, 536 LDO3318_PWR_MASK, LDO_SUSPEND); 537 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, 538 FORCE_LDO_POWERB, FORCE_LDO_POWERB); 539 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 540 0x30, 0x10); 541 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 542 0x03, 0x01); 543 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 544 0x0C, 0x04); 545 } 546 547 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SYS_DUMMY0, NYET_MSAK, NYET_EN); 548 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CD_DEGLITCH_WIDTH, 0xFF, 0x08); 549 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 550 CD_DEGLITCH_EN, XD_CD_DEGLITCH_EN, 0x0); 551 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD30_DRIVE_SEL, 552 SD30_DRIVE_MASK, DRIVER_TYPE_D); 553 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 554 CARD_DRIVE_SEL, SD20_DRIVE_MASK, 0x0); 555 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG, 0xE0, 0x0); 556 557 if (ucr->is_rts5179) 558 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 559 CARD_PULL_CTL5, 0x03, 0x01); 560 561 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DMA1_CTL, 562 EXTEND_DMA1_ASYNC_SIGNAL, EXTEND_DMA1_ASYNC_SIGNAL); 563 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_INT_PEND, 564 XD_INT | MS_INT | SD_INT, 565 XD_INT | MS_INT | SD_INT); 566 567 ret = rtsx_usb_send_cmd(ucr, MODE_C, 100); 568 if (ret) 569 return ret; 570 571 /* config non-crystal mode */ 572 rtsx_usb_read_register(ucr, CFG_MODE, &val); 573 if ((val & XTAL_FREE) || ((val & CLK_MODE_MASK) == CLK_MODE_NON_XTAL)) { 574 ret = rtsx_usb_write_phy_register(ucr, 0xC2, 0x7C); 575 if (ret) 576 return ret; 577 } 578 579 return 0; 580 } 581 582 static int rtsx_usb_init_chip(struct rtsx_ucr *ucr) 583 { 584 int ret; 585 u8 val; 586 587 rtsx_usb_clear_fsm_err(ucr); 588 589 /* power on SSC */ 590 ret = rtsx_usb_write_register(ucr, 591 FPDCTL, SSC_POWER_MASK, SSC_POWER_ON); 592 if (ret) 593 return ret; 594 595 usleep_range(100, 1000); 596 ret = rtsx_usb_write_register(ucr, CLK_DIV, CLK_CHANGE, 0x00); 597 if (ret) 598 return ret; 599 600 /* determine IC version */ 601 ret = rtsx_usb_read_register(ucr, HW_VERSION, &val); 602 if (ret) 603 return ret; 604 605 ucr->ic_version = val & HW_VER_MASK; 606 607 /* determine package */ 608 ret = rtsx_usb_read_register(ucr, CARD_SHARE_MODE, &val); 609 if (ret) 610 return ret; 611 612 if (val & CARD_SHARE_LQFP_SEL) { 613 ucr->package = LQFP48; 614 dev_dbg(&ucr->pusb_intf->dev, "Package: LQFP48\n"); 615 } else { 616 ucr->package = QFN24; 617 dev_dbg(&ucr->pusb_intf->dev, "Package: QFN24\n"); 618 } 619 620 /* determine IC variations */ 621 rtsx_usb_read_register(ucr, CFG_MODE_1, &val); 622 if (val & RTS5179) { 623 ucr->is_rts5179 = true; 624 dev_dbg(&ucr->pusb_intf->dev, "Device is rts5179\n"); 625 } else { 626 ucr->is_rts5179 = false; 627 } 628 629 return rtsx_usb_reset_chip(ucr); 630 } 631 632 static int rtsx_usb_probe(struct usb_interface *intf, 633 const struct usb_device_id *id) 634 { 635 struct usb_device *usb_dev = interface_to_usbdev(intf); 636 struct rtsx_ucr *ucr; 637 int ret; 638 639 dev_dbg(&intf->dev, 640 ": Realtek USB Card Reader found at bus %03d address %03d\n", 641 usb_dev->bus->busnum, usb_dev->devnum); 642 643 ucr = devm_kzalloc(&intf->dev, sizeof(*ucr), GFP_KERNEL); 644 if (!ucr) 645 return -ENOMEM; 646 647 ucr->pusb_dev = usb_dev; 648 649 ucr->cmd_buf = kmalloc(IOBUF_SIZE, GFP_KERNEL); 650 if (!ucr->cmd_buf) 651 return -ENOMEM; 652 653 ucr->rsp_buf = kmalloc(IOBUF_SIZE, GFP_KERNEL); 654 if (!ucr->rsp_buf) { 655 ret = -ENOMEM; 656 goto out_free_cmd_buf; 657 } 658 659 usb_set_intfdata(intf, ucr); 660 661 ucr->vendor_id = id->idVendor; 662 ucr->product_id = id->idProduct; 663 664 mutex_init(&ucr->dev_mutex); 665 666 ucr->pusb_intf = intf; 667 668 /* initialize */ 669 ret = rtsx_usb_init_chip(ucr); 670 if (ret) 671 goto out_init_fail; 672 673 /* initialize USB SG transfer timer */ 674 timer_setup(&ucr->sg_timer, rtsx_usb_sg_timed_out, 0); 675 676 ret = mfd_add_hotplug_devices(&intf->dev, rtsx_usb_cells, 677 ARRAY_SIZE(rtsx_usb_cells)); 678 if (ret) 679 goto out_init_fail; 680 681 #ifdef CONFIG_PM 682 intf->needs_remote_wakeup = 1; 683 usb_enable_autosuspend(usb_dev); 684 #endif 685 686 return 0; 687 688 out_init_fail: 689 usb_set_intfdata(ucr->pusb_intf, NULL); 690 kfree(ucr->rsp_buf); 691 ucr->rsp_buf = NULL; 692 out_free_cmd_buf: 693 kfree(ucr->cmd_buf); 694 ucr->cmd_buf = NULL; 695 return ret; 696 } 697 698 static void rtsx_usb_disconnect(struct usb_interface *intf) 699 { 700 struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); 701 702 dev_dbg(&intf->dev, "%s called\n", __func__); 703 704 mfd_remove_devices(&intf->dev); 705 706 usb_set_intfdata(ucr->pusb_intf, NULL); 707 708 kfree(ucr->cmd_buf); 709 ucr->cmd_buf = NULL; 710 711 kfree(ucr->rsp_buf); 712 ucr->rsp_buf = NULL; 713 } 714 715 #ifdef CONFIG_PM 716 static int rtsx_usb_suspend(struct usb_interface *intf, pm_message_t message) 717 { 718 struct rtsx_ucr *ucr = 719 (struct rtsx_ucr *)usb_get_intfdata(intf); 720 u16 val = 0; 721 722 dev_dbg(&intf->dev, "%s called with pm message 0x%04x\n", 723 __func__, message.event); 724 725 if (PMSG_IS_AUTO(message)) { 726 if (mutex_trylock(&ucr->dev_mutex)) { 727 rtsx_usb_get_card_status(ucr, &val); 728 mutex_unlock(&ucr->dev_mutex); 729 730 /* Defer the autosuspend if card exists */ 731 if (val & (SD_CD | MS_CD)) 732 return -EAGAIN; 733 } else { 734 /* There is an ongoing operation*/ 735 return -EAGAIN; 736 } 737 } 738 739 return 0; 740 } 741 742 static int rtsx_usb_resume_child(struct device *dev, void *data) 743 { 744 pm_request_resume(dev); 745 return 0; 746 } 747 748 static int rtsx_usb_resume(struct usb_interface *intf) 749 { 750 device_for_each_child(&intf->dev, NULL, rtsx_usb_resume_child); 751 return 0; 752 } 753 754 static int rtsx_usb_reset_resume(struct usb_interface *intf) 755 { 756 struct rtsx_ucr *ucr = 757 (struct rtsx_ucr *)usb_get_intfdata(intf); 758 759 rtsx_usb_reset_chip(ucr); 760 device_for_each_child(&intf->dev, NULL, rtsx_usb_resume_child); 761 return 0; 762 } 763 764 #else /* CONFIG_PM */ 765 766 #define rtsx_usb_suspend NULL 767 #define rtsx_usb_resume NULL 768 #define rtsx_usb_reset_resume NULL 769 770 #endif /* CONFIG_PM */ 771 772 773 static int rtsx_usb_pre_reset(struct usb_interface *intf) 774 { 775 struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); 776 777 mutex_lock(&ucr->dev_mutex); 778 return 0; 779 } 780 781 static int rtsx_usb_post_reset(struct usb_interface *intf) 782 { 783 struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); 784 785 mutex_unlock(&ucr->dev_mutex); 786 return 0; 787 } 788 789 static const struct usb_device_id rtsx_usb_usb_ids[] = { 790 { USB_DEVICE(0x0BDA, 0x0129) }, 791 { USB_DEVICE(0x0BDA, 0x0139) }, 792 { USB_DEVICE(0x0BDA, 0x0140) }, 793 { } 794 }; 795 MODULE_DEVICE_TABLE(usb, rtsx_usb_usb_ids); 796 797 static struct usb_driver rtsx_usb_driver = { 798 .name = DRV_NAME_RTSX_USB, 799 .probe = rtsx_usb_probe, 800 .disconnect = rtsx_usb_disconnect, 801 .suspend = rtsx_usb_suspend, 802 .resume = rtsx_usb_resume, 803 .reset_resume = rtsx_usb_reset_resume, 804 .pre_reset = rtsx_usb_pre_reset, 805 .post_reset = rtsx_usb_post_reset, 806 .id_table = rtsx_usb_usb_ids, 807 .supports_autosuspend = 1, 808 .soft_unbind = 1, 809 }; 810 811 module_usb_driver(rtsx_usb_driver); 812 813 MODULE_LICENSE("GPL v2"); 814 MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>"); 815 MODULE_DESCRIPTION("Realtek USB Card Reader Driver"); 816