1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Realtek USB Memstick Card Interface driver 3 * 4 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved. 5 * 6 * Author: 7 * Roger Tseng <rogerable@realtek.com> 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/workqueue.h> 15 #include <linux/memstick.h> 16 #include <linux/kthread.h> 17 #include <linux/rtsx_usb.h> 18 #include <linux/pm_runtime.h> 19 #include <linux/mutex.h> 20 #include <linux/sched.h> 21 #include <linux/completion.h> 22 #include <asm/unaligned.h> 23 24 struct rtsx_usb_ms { 25 struct platform_device *pdev; 26 struct rtsx_ucr *ucr; 27 struct memstick_host *msh; 28 struct memstick_request *req; 29 30 struct mutex host_mutex; 31 struct work_struct handle_req; 32 struct delayed_work poll_card; 33 34 u8 ssc_depth; 35 unsigned int clock; 36 int power_mode; 37 unsigned char ifmode; 38 bool eject; 39 bool system_suspending; 40 }; 41 42 static inline struct device *ms_dev(struct rtsx_usb_ms *host) 43 { 44 return &(host->pdev->dev); 45 } 46 47 static inline void ms_clear_error(struct rtsx_usb_ms *host) 48 { 49 struct rtsx_ucr *ucr = host->ucr; 50 rtsx_usb_ep0_write_register(ucr, CARD_STOP, 51 MS_STOP | MS_CLR_ERR, 52 MS_STOP | MS_CLR_ERR); 53 54 rtsx_usb_clear_dma_err(ucr); 55 rtsx_usb_clear_fsm_err(ucr); 56 } 57 58 #ifdef DEBUG 59 60 static void ms_print_debug_regs(struct rtsx_usb_ms *host) 61 { 62 struct rtsx_ucr *ucr = host->ucr; 63 u16 i; 64 u8 *ptr; 65 66 /* Print MS host internal registers */ 67 rtsx_usb_init_cmd(ucr); 68 69 /* MS_CFG to MS_INT_REG */ 70 for (i = 0xFD40; i <= 0xFD44; i++) 71 rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0); 72 73 /* CARD_SHARE_MODE to CARD_GPIO */ 74 for (i = 0xFD51; i <= 0xFD56; i++) 75 rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0); 76 77 /* CARD_PULL_CTLx */ 78 for (i = 0xFD60; i <= 0xFD65; i++) 79 rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0); 80 81 /* CARD_DATA_SOURCE, CARD_SELECT, CARD_CLK_EN, CARD_PWR_CTL */ 82 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_DATA_SOURCE, 0, 0); 83 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_SELECT, 0, 0); 84 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_CLK_EN, 0, 0); 85 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_PWR_CTL, 0, 0); 86 87 rtsx_usb_send_cmd(ucr, MODE_CR, 100); 88 rtsx_usb_get_rsp(ucr, 21, 100); 89 90 ptr = ucr->rsp_buf; 91 for (i = 0xFD40; i <= 0xFD44; i++) 92 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++)); 93 for (i = 0xFD51; i <= 0xFD56; i++) 94 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++)); 95 for (i = 0xFD60; i <= 0xFD65; i++) 96 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++)); 97 98 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_DATA_SOURCE, *(ptr++)); 99 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_SELECT, *(ptr++)); 100 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_CLK_EN, *(ptr++)); 101 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_PWR_CTL, *(ptr++)); 102 } 103 104 #else 105 106 static void ms_print_debug_regs(struct rtsx_usb_ms *host) 107 { 108 } 109 110 #endif 111 112 static int ms_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr) 113 { 114 rtsx_usb_init_cmd(ucr); 115 116 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55); 117 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55); 118 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95); 119 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); 120 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55); 121 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5); 122 123 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 124 } 125 126 static int ms_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr) 127 { 128 rtsx_usb_init_cmd(ucr); 129 130 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65); 131 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55); 132 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95); 133 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); 134 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56); 135 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59); 136 137 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 138 } 139 140 static int ms_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr) 141 { 142 rtsx_usb_init_cmd(ucr); 143 144 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55); 145 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55); 146 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95); 147 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); 148 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55); 149 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5); 150 151 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 152 } 153 154 static int ms_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr) 155 { 156 rtsx_usb_init_cmd(ucr); 157 158 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65); 159 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55); 160 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95); 161 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); 162 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55); 163 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59); 164 165 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 166 } 167 168 static int ms_power_on(struct rtsx_usb_ms *host) 169 { 170 struct rtsx_ucr *ucr = host->ucr; 171 int err; 172 173 dev_dbg(ms_dev(host), "%s\n", __func__); 174 175 rtsx_usb_init_cmd(ucr); 176 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, MS_MOD_SEL); 177 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE, 178 CARD_SHARE_MASK, CARD_SHARE_MS); 179 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, 180 MS_CLK_EN, MS_CLK_EN); 181 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 182 if (err < 0) 183 return err; 184 185 if (CHECK_PKG(ucr, LQFP48)) 186 err = ms_pull_ctl_enable_lqfp48(ucr); 187 else 188 err = ms_pull_ctl_enable_qfn24(ucr); 189 if (err < 0) 190 return err; 191 192 err = rtsx_usb_write_register(ucr, CARD_PWR_CTL, 193 POWER_MASK, PARTIAL_POWER_ON); 194 if (err) 195 return err; 196 197 usleep_range(800, 1000); 198 199 rtsx_usb_init_cmd(ucr); 200 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, 201 POWER_MASK, POWER_ON); 202 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, 203 MS_OUTPUT_EN, MS_OUTPUT_EN); 204 205 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 206 } 207 208 static int ms_power_off(struct rtsx_usb_ms *host) 209 { 210 struct rtsx_ucr *ucr = host->ucr; 211 int err; 212 213 dev_dbg(ms_dev(host), "%s\n", __func__); 214 215 rtsx_usb_init_cmd(ucr); 216 217 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, MS_CLK_EN, 0); 218 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, MS_OUTPUT_EN, 0); 219 220 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 221 if (err < 0) 222 return err; 223 224 if (CHECK_PKG(ucr, LQFP48)) 225 return ms_pull_ctl_disable_lqfp48(ucr); 226 227 return ms_pull_ctl_disable_qfn24(ucr); 228 } 229 230 static int ms_transfer_data(struct rtsx_usb_ms *host, unsigned char data_dir, 231 u8 tpc, u8 cfg, struct scatterlist *sg) 232 { 233 struct rtsx_ucr *ucr = host->ucr; 234 int err; 235 unsigned int length = sg->length; 236 u16 sec_cnt = (u16)(length / 512); 237 u8 trans_mode, dma_dir, flag; 238 unsigned int pipe; 239 struct memstick_dev *card = host->msh->card; 240 241 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x, data_dir = %s, length = %d\n", 242 __func__, tpc, (data_dir == READ) ? "READ" : "WRITE", 243 length); 244 245 if (data_dir == READ) { 246 flag = MODE_CDIR; 247 dma_dir = DMA_DIR_FROM_CARD; 248 if (card->id.type != MEMSTICK_TYPE_PRO) 249 trans_mode = MS_TM_NORMAL_READ; 250 else 251 trans_mode = MS_TM_AUTO_READ; 252 pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN); 253 } else { 254 flag = MODE_CDOR; 255 dma_dir = DMA_DIR_TO_CARD; 256 if (card->id.type != MEMSTICK_TYPE_PRO) 257 trans_mode = MS_TM_NORMAL_WRITE; 258 else 259 trans_mode = MS_TM_AUTO_WRITE; 260 pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT); 261 } 262 263 rtsx_usb_init_cmd(ucr); 264 265 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc); 266 if (card->id.type == MEMSTICK_TYPE_PRO) { 267 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_H, 268 0xFF, (u8)(sec_cnt >> 8)); 269 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_L, 270 0xFF, (u8)sec_cnt); 271 } 272 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg); 273 274 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3, 275 0xFF, (u8)(length >> 24)); 276 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2, 277 0xFF, (u8)(length >> 16)); 278 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1, 279 0xFF, (u8)(length >> 8)); 280 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0, 0xFF, 281 (u8)length); 282 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL, 283 0x03 | DMA_PACK_SIZE_MASK, dma_dir | DMA_EN | DMA_512); 284 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE, 285 0x01, RING_BUFFER); 286 287 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER, 288 0xFF, MS_TRANSFER_START | trans_mode); 289 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER, 290 MS_TRANSFER_END, MS_TRANSFER_END); 291 292 err = rtsx_usb_send_cmd(ucr, flag | STAGE_MS_STATUS, 100); 293 if (err) 294 return err; 295 296 err = rtsx_usb_transfer_data(ucr, pipe, sg, length, 297 1, NULL, 10000); 298 if (err) 299 goto err_out; 300 301 err = rtsx_usb_get_rsp(ucr, 3, 15000); 302 if (err) 303 goto err_out; 304 305 if (ucr->rsp_buf[0] & MS_TRANSFER_ERR || 306 ucr->rsp_buf[1] & (MS_CRC16_ERR | MS_RDY_TIMEOUT)) { 307 err = -EIO; 308 goto err_out; 309 } 310 return 0; 311 err_out: 312 ms_clear_error(host); 313 return err; 314 } 315 316 static int ms_write_bytes(struct rtsx_usb_ms *host, u8 tpc, 317 u8 cfg, u8 cnt, u8 *data, u8 *int_reg) 318 { 319 struct rtsx_ucr *ucr = host->ucr; 320 int err, i; 321 322 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc); 323 324 rtsx_usb_init_cmd(ucr); 325 326 for (i = 0; i < cnt; i++) 327 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 328 PPBUF_BASE2 + i, 0xFF, data[i]); 329 330 if (cnt % 2) 331 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 332 PPBUF_BASE2 + i, 0xFF, 0xFF); 333 334 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc); 335 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt); 336 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg); 337 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE, 338 0x01, PINGPONG_BUFFER); 339 340 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER, 341 0xFF, MS_TRANSFER_START | MS_TM_WRITE_BYTES); 342 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER, 343 MS_TRANSFER_END, MS_TRANSFER_END); 344 rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0); 345 346 err = rtsx_usb_send_cmd(ucr, MODE_CR, 100); 347 if (err) 348 return err; 349 350 err = rtsx_usb_get_rsp(ucr, 2, 5000); 351 if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) { 352 u8 val; 353 354 rtsx_usb_ep0_read_register(ucr, MS_TRANS_CFG, &val); 355 dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val); 356 357 if (int_reg) 358 *int_reg = val & 0x0F; 359 360 ms_print_debug_regs(host); 361 362 ms_clear_error(host); 363 364 if (!(tpc & 0x08)) { 365 if (val & MS_CRC16_ERR) 366 return -EIO; 367 } else { 368 if (!(val & 0x80)) { 369 if (val & (MS_INT_ERR | MS_INT_CMDNK)) 370 return -EIO; 371 } 372 } 373 374 return -ETIMEDOUT; 375 } 376 377 if (int_reg) 378 *int_reg = ucr->rsp_buf[1] & 0x0F; 379 380 return 0; 381 } 382 383 static int ms_read_bytes(struct rtsx_usb_ms *host, u8 tpc, 384 u8 cfg, u8 cnt, u8 *data, u8 *int_reg) 385 { 386 struct rtsx_ucr *ucr = host->ucr; 387 int err, i; 388 u8 *ptr; 389 390 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc); 391 392 rtsx_usb_init_cmd(ucr); 393 394 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc); 395 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt); 396 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg); 397 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE, 398 0x01, PINGPONG_BUFFER); 399 400 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER, 401 0xFF, MS_TRANSFER_START | MS_TM_READ_BYTES); 402 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER, 403 MS_TRANSFER_END, MS_TRANSFER_END); 404 for (i = 0; i < cnt - 1; i++) 405 rtsx_usb_add_cmd(ucr, READ_REG_CMD, PPBUF_BASE2 + i, 0, 0); 406 if (cnt % 2) 407 rtsx_usb_add_cmd(ucr, READ_REG_CMD, PPBUF_BASE2 + cnt, 0, 0); 408 else 409 rtsx_usb_add_cmd(ucr, READ_REG_CMD, 410 PPBUF_BASE2 + cnt - 1, 0, 0); 411 412 rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0); 413 414 err = rtsx_usb_send_cmd(ucr, MODE_CR, 100); 415 if (err) 416 return err; 417 418 err = rtsx_usb_get_rsp(ucr, cnt + 2, 5000); 419 if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) { 420 u8 val; 421 422 rtsx_usb_ep0_read_register(ucr, MS_TRANS_CFG, &val); 423 dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val); 424 425 if (int_reg && (host->ifmode != MEMSTICK_SERIAL)) 426 *int_reg = val & 0x0F; 427 428 ms_print_debug_regs(host); 429 430 ms_clear_error(host); 431 432 if (!(tpc & 0x08)) { 433 if (val & MS_CRC16_ERR) 434 return -EIO; 435 } else { 436 if (!(val & 0x80)) { 437 if (val & (MS_INT_ERR | MS_INT_CMDNK)) 438 return -EIO; 439 } 440 } 441 442 return -ETIMEDOUT; 443 } 444 445 ptr = ucr->rsp_buf + 1; 446 for (i = 0; i < cnt; i++) 447 data[i] = *ptr++; 448 449 450 if (int_reg && (host->ifmode != MEMSTICK_SERIAL)) 451 *int_reg = *ptr & 0x0F; 452 453 return 0; 454 } 455 456 static int rtsx_usb_ms_issue_cmd(struct rtsx_usb_ms *host) 457 { 458 struct memstick_request *req = host->req; 459 int err = 0; 460 u8 cfg = 0, int_reg; 461 462 dev_dbg(ms_dev(host), "%s\n", __func__); 463 464 if (req->need_card_int) { 465 if (host->ifmode != MEMSTICK_SERIAL) 466 cfg = WAIT_INT; 467 } 468 469 if (req->long_data) { 470 err = ms_transfer_data(host, req->data_dir, 471 req->tpc, cfg, &(req->sg)); 472 } else { 473 if (req->data_dir == READ) 474 err = ms_read_bytes(host, req->tpc, cfg, 475 req->data_len, req->data, &int_reg); 476 else 477 err = ms_write_bytes(host, req->tpc, cfg, 478 req->data_len, req->data, &int_reg); 479 } 480 if (err < 0) 481 return err; 482 483 if (req->need_card_int) { 484 if (host->ifmode == MEMSTICK_SERIAL) { 485 err = ms_read_bytes(host, MS_TPC_GET_INT, 486 NO_WAIT_INT, 1, &req->int_reg, NULL); 487 if (err < 0) 488 return err; 489 } else { 490 491 if (int_reg & MS_INT_CMDNK) 492 req->int_reg |= MEMSTICK_INT_CMDNAK; 493 if (int_reg & MS_INT_BREQ) 494 req->int_reg |= MEMSTICK_INT_BREQ; 495 if (int_reg & MS_INT_ERR) 496 req->int_reg |= MEMSTICK_INT_ERR; 497 if (int_reg & MS_INT_CED) 498 req->int_reg |= MEMSTICK_INT_CED; 499 } 500 dev_dbg(ms_dev(host), "int_reg: 0x%02x\n", req->int_reg); 501 } 502 503 return 0; 504 } 505 506 static void rtsx_usb_ms_handle_req(struct work_struct *work) 507 { 508 struct rtsx_usb_ms *host = container_of(work, 509 struct rtsx_usb_ms, handle_req); 510 struct rtsx_ucr *ucr = host->ucr; 511 struct memstick_host *msh = host->msh; 512 int rc; 513 514 if (!host->req) { 515 pm_runtime_get_sync(ms_dev(host)); 516 do { 517 rc = memstick_next_req(msh, &host->req); 518 dev_dbg(ms_dev(host), "next req %d\n", rc); 519 520 if (!rc) { 521 mutex_lock(&ucr->dev_mutex); 522 523 if (rtsx_usb_card_exclusive_check(ucr, 524 RTSX_USB_MS_CARD)) 525 host->req->error = -EIO; 526 else 527 host->req->error = 528 rtsx_usb_ms_issue_cmd(host); 529 530 mutex_unlock(&ucr->dev_mutex); 531 532 dev_dbg(ms_dev(host), "req result %d\n", 533 host->req->error); 534 } 535 } while (!rc); 536 pm_runtime_put_sync(ms_dev(host)); 537 } 538 539 } 540 541 static void rtsx_usb_ms_request(struct memstick_host *msh) 542 { 543 struct rtsx_usb_ms *host = memstick_priv(msh); 544 545 dev_dbg(ms_dev(host), "--> %s\n", __func__); 546 547 if (!host->eject) 548 schedule_work(&host->handle_req); 549 } 550 551 static int rtsx_usb_ms_set_param(struct memstick_host *msh, 552 enum memstick_param param, int value) 553 { 554 struct rtsx_usb_ms *host = memstick_priv(msh); 555 struct rtsx_ucr *ucr = host->ucr; 556 unsigned int clock = 0; 557 u8 ssc_depth = 0; 558 int err; 559 560 dev_dbg(ms_dev(host), "%s: param = %d, value = %d\n", 561 __func__, param, value); 562 563 pm_runtime_get_sync(ms_dev(host)); 564 mutex_lock(&ucr->dev_mutex); 565 566 err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_MS_CARD); 567 if (err) 568 goto out; 569 570 switch (param) { 571 case MEMSTICK_POWER: 572 if (value == host->power_mode) 573 break; 574 575 if (value == MEMSTICK_POWER_ON) { 576 pm_runtime_get_noresume(ms_dev(host)); 577 err = ms_power_on(host); 578 if (err) 579 pm_runtime_put_noidle(ms_dev(host)); 580 } else if (value == MEMSTICK_POWER_OFF) { 581 err = ms_power_off(host); 582 if (!err) 583 pm_runtime_put_noidle(ms_dev(host)); 584 } else 585 err = -EINVAL; 586 if (!err) 587 host->power_mode = value; 588 break; 589 590 case MEMSTICK_INTERFACE: 591 if (value == MEMSTICK_SERIAL) { 592 clock = 19000000; 593 ssc_depth = SSC_DEPTH_512K; 594 err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A, 595 MS_BUS_WIDTH_1 | PUSH_TIME_DEFAULT); 596 if (err < 0) 597 break; 598 } else if (value == MEMSTICK_PAR4) { 599 clock = 39000000; 600 ssc_depth = SSC_DEPTH_1M; 601 602 err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A, 603 MS_BUS_WIDTH_4 | PUSH_TIME_ODD | 604 MS_NO_CHECK_INT); 605 if (err < 0) 606 break; 607 } else { 608 err = -EINVAL; 609 break; 610 } 611 612 err = rtsx_usb_switch_clock(ucr, clock, 613 ssc_depth, false, true, false); 614 if (err < 0) { 615 dev_dbg(ms_dev(host), "switch clock failed\n"); 616 break; 617 } 618 619 host->ssc_depth = ssc_depth; 620 host->clock = clock; 621 host->ifmode = value; 622 break; 623 default: 624 err = -EINVAL; 625 break; 626 } 627 out: 628 mutex_unlock(&ucr->dev_mutex); 629 pm_runtime_put_sync(ms_dev(host)); 630 631 /* power-on delay */ 632 if (param == MEMSTICK_POWER && value == MEMSTICK_POWER_ON) { 633 usleep_range(10000, 12000); 634 635 if (!host->eject) 636 schedule_delayed_work(&host->poll_card, 100); 637 } 638 639 dev_dbg(ms_dev(host), "%s: return = %d\n", __func__, err); 640 return err; 641 } 642 643 #ifdef CONFIG_PM_SLEEP 644 static int rtsx_usb_ms_suspend(struct device *dev) 645 { 646 struct rtsx_usb_ms *host = dev_get_drvdata(dev); 647 struct memstick_host *msh = host->msh; 648 649 /* Since we use rtsx_usb's resume callback to runtime resume its 650 * children to implement remote wakeup signaling, this causes 651 * rtsx_usb_ms' runtime resume callback runs after its suspend 652 * callback: 653 * rtsx_usb_ms_suspend() 654 * rtsx_usb_resume() 655 * -> rtsx_usb_ms_runtime_resume() 656 * -> memstick_detect_change() 657 * 658 * rtsx_usb_suspend() 659 * 660 * To avoid this, skip runtime resume/suspend if system suspend is 661 * underway. 662 */ 663 664 host->system_suspending = true; 665 memstick_suspend_host(msh); 666 667 return 0; 668 } 669 670 static int rtsx_usb_ms_resume(struct device *dev) 671 { 672 struct rtsx_usb_ms *host = dev_get_drvdata(dev); 673 struct memstick_host *msh = host->msh; 674 675 memstick_resume_host(msh); 676 host->system_suspending = false; 677 678 return 0; 679 } 680 #endif /* CONFIG_PM_SLEEP */ 681 682 #ifdef CONFIG_PM 683 static int rtsx_usb_ms_runtime_suspend(struct device *dev) 684 { 685 struct rtsx_usb_ms *host = dev_get_drvdata(dev); 686 687 if (host->system_suspending) 688 return 0; 689 690 if (host->msh->card || host->power_mode != MEMSTICK_POWER_OFF) 691 return -EAGAIN; 692 693 return 0; 694 } 695 696 static int rtsx_usb_ms_runtime_resume(struct device *dev) 697 { 698 struct rtsx_usb_ms *host = dev_get_drvdata(dev); 699 700 701 if (host->system_suspending) 702 return 0; 703 704 memstick_detect_change(host->msh); 705 706 return 0; 707 } 708 #endif /* CONFIG_PM */ 709 710 static const struct dev_pm_ops rtsx_usb_ms_pm_ops = { 711 SET_SYSTEM_SLEEP_PM_OPS(rtsx_usb_ms_suspend, rtsx_usb_ms_resume) 712 SET_RUNTIME_PM_OPS(rtsx_usb_ms_runtime_suspend, rtsx_usb_ms_runtime_resume, NULL) 713 }; 714 715 716 static void rtsx_usb_ms_poll_card(struct work_struct *work) 717 { 718 struct rtsx_usb_ms *host = container_of(work, struct rtsx_usb_ms, 719 poll_card.work); 720 struct rtsx_ucr *ucr = host->ucr; 721 int err; 722 u8 val; 723 724 if (host->eject || host->power_mode != MEMSTICK_POWER_ON) 725 return; 726 727 pm_runtime_get_sync(ms_dev(host)); 728 mutex_lock(&ucr->dev_mutex); 729 730 /* Check pending MS card changes */ 731 err = rtsx_usb_read_register(ucr, CARD_INT_PEND, &val); 732 if (err) { 733 mutex_unlock(&ucr->dev_mutex); 734 goto poll_again; 735 } 736 737 /* Clear the pending */ 738 rtsx_usb_write_register(ucr, CARD_INT_PEND, 739 XD_INT | MS_INT | SD_INT, 740 XD_INT | MS_INT | SD_INT); 741 742 mutex_unlock(&ucr->dev_mutex); 743 744 if (val & MS_INT) { 745 dev_dbg(ms_dev(host), "MS slot change detected\n"); 746 memstick_detect_change(host->msh); 747 } 748 749 poll_again: 750 pm_runtime_put_sync(ms_dev(host)); 751 752 if (!host->eject && host->power_mode == MEMSTICK_POWER_ON) 753 schedule_delayed_work(&host->poll_card, 100); 754 } 755 756 static int rtsx_usb_ms_drv_probe(struct platform_device *pdev) 757 { 758 struct memstick_host *msh; 759 struct rtsx_usb_ms *host; 760 struct rtsx_ucr *ucr; 761 int err; 762 763 ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent)); 764 if (!ucr) 765 return -ENXIO; 766 767 dev_dbg(&(pdev->dev), 768 "Realtek USB Memstick controller found\n"); 769 770 msh = memstick_alloc_host(sizeof(*host), &pdev->dev); 771 if (!msh) 772 return -ENOMEM; 773 774 host = memstick_priv(msh); 775 host->ucr = ucr; 776 host->msh = msh; 777 host->pdev = pdev; 778 host->power_mode = MEMSTICK_POWER_OFF; 779 platform_set_drvdata(pdev, host); 780 781 mutex_init(&host->host_mutex); 782 INIT_WORK(&host->handle_req, rtsx_usb_ms_handle_req); 783 784 INIT_DELAYED_WORK(&host->poll_card, rtsx_usb_ms_poll_card); 785 786 msh->request = rtsx_usb_ms_request; 787 msh->set_param = rtsx_usb_ms_set_param; 788 msh->caps = MEMSTICK_CAP_PAR4; 789 790 pm_runtime_get_noresume(ms_dev(host)); 791 pm_runtime_set_active(ms_dev(host)); 792 pm_runtime_enable(ms_dev(host)); 793 794 err = memstick_add_host(msh); 795 if (err) 796 goto err_out; 797 798 pm_runtime_put(ms_dev(host)); 799 800 return 0; 801 err_out: 802 pm_runtime_disable(ms_dev(host)); 803 pm_runtime_put_noidle(ms_dev(host)); 804 memstick_free_host(msh); 805 return err; 806 } 807 808 static int rtsx_usb_ms_drv_remove(struct platform_device *pdev) 809 { 810 struct rtsx_usb_ms *host = platform_get_drvdata(pdev); 811 struct memstick_host *msh = host->msh; 812 int err; 813 814 host->eject = true; 815 cancel_work_sync(&host->handle_req); 816 817 mutex_lock(&host->host_mutex); 818 if (host->req) { 819 dev_dbg(ms_dev(host), 820 "%s: Controller removed during transfer\n", 821 dev_name(&msh->dev)); 822 host->req->error = -ENOMEDIUM; 823 do { 824 err = memstick_next_req(msh, &host->req); 825 if (!err) 826 host->req->error = -ENOMEDIUM; 827 } while (!err); 828 } 829 mutex_unlock(&host->host_mutex); 830 831 /* Balance possible unbalanced usage count 832 * e.g. unconditional module removal 833 */ 834 if (pm_runtime_active(ms_dev(host))) 835 pm_runtime_put(ms_dev(host)); 836 837 pm_runtime_disable(ms_dev(host)); 838 memstick_remove_host(msh); 839 dev_dbg(ms_dev(host), 840 ": Realtek USB Memstick controller has been removed\n"); 841 memstick_free_host(msh); 842 platform_set_drvdata(pdev, NULL); 843 844 return 0; 845 } 846 847 static struct platform_device_id rtsx_usb_ms_ids[] = { 848 { 849 .name = "rtsx_usb_ms", 850 }, { 851 /* sentinel */ 852 } 853 }; 854 MODULE_DEVICE_TABLE(platform, rtsx_usb_ms_ids); 855 856 static struct platform_driver rtsx_usb_ms_driver = { 857 .probe = rtsx_usb_ms_drv_probe, 858 .remove = rtsx_usb_ms_drv_remove, 859 .id_table = rtsx_usb_ms_ids, 860 .driver = { 861 .name = "rtsx_usb_ms", 862 .pm = &rtsx_usb_ms_pm_ops, 863 }, 864 }; 865 module_platform_driver(rtsx_usb_ms_driver); 866 867 MODULE_LICENSE("GPL v2"); 868 MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>"); 869 MODULE_DESCRIPTION("Realtek USB Memstick Card Host Driver"); 870