1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Realtek USB SD/MMC 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/slab.h> 12 #include <linux/delay.h> 13 #include <linux/platform_device.h> 14 #include <linux/usb.h> 15 #include <linux/mmc/host.h> 16 #include <linux/mmc/mmc.h> 17 #include <linux/mmc/sd.h> 18 #include <linux/mmc/card.h> 19 #include <linux/scatterlist.h> 20 #include <linux/pm.h> 21 #include <linux/pm_runtime.h> 22 23 #include <linux/rtsx_usb.h> 24 #include <asm/unaligned.h> 25 26 #if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \ 27 defined(CONFIG_MMC_REALTEK_USB_MODULE)) 28 #include <linux/leds.h> 29 #include <linux/workqueue.h> 30 #define RTSX_USB_USE_LEDS_CLASS 31 #endif 32 33 struct rtsx_usb_sdmmc { 34 struct platform_device *pdev; 35 struct rtsx_ucr *ucr; 36 struct mmc_host *mmc; 37 struct mmc_request *mrq; 38 39 struct mutex host_mutex; 40 41 u8 ssc_depth; 42 unsigned int clock; 43 bool vpclk; 44 bool double_clk; 45 bool host_removal; 46 bool card_exist; 47 bool initial_mode; 48 bool ddr_mode; 49 50 unsigned char power_mode; 51 52 #ifdef RTSX_USB_USE_LEDS_CLASS 53 struct led_classdev led; 54 char led_name[32]; 55 struct work_struct led_work; 56 #endif 57 }; 58 59 static inline struct device *sdmmc_dev(struct rtsx_usb_sdmmc *host) 60 { 61 return &(host->pdev->dev); 62 } 63 64 static inline void sd_clear_error(struct rtsx_usb_sdmmc *host) 65 { 66 struct rtsx_ucr *ucr = host->ucr; 67 rtsx_usb_ep0_write_register(ucr, CARD_STOP, 68 SD_STOP | SD_CLR_ERR, 69 SD_STOP | SD_CLR_ERR); 70 71 rtsx_usb_clear_dma_err(ucr); 72 rtsx_usb_clear_fsm_err(ucr); 73 } 74 75 #ifdef DEBUG 76 static void sd_print_debug_regs(struct rtsx_usb_sdmmc *host) 77 { 78 struct rtsx_ucr *ucr = host->ucr; 79 u8 val = 0; 80 81 rtsx_usb_ep0_read_register(ucr, SD_STAT1, &val); 82 dev_dbg(sdmmc_dev(host), "SD_STAT1: 0x%x\n", val); 83 rtsx_usb_ep0_read_register(ucr, SD_STAT2, &val); 84 dev_dbg(sdmmc_dev(host), "SD_STAT2: 0x%x\n", val); 85 rtsx_usb_ep0_read_register(ucr, SD_BUS_STAT, &val); 86 dev_dbg(sdmmc_dev(host), "SD_BUS_STAT: 0x%x\n", val); 87 } 88 #else 89 #define sd_print_debug_regs(host) 90 #endif /* DEBUG */ 91 92 static int sd_read_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd, 93 u16 byte_cnt, u8 *buf, int buf_len, int timeout) 94 { 95 struct rtsx_ucr *ucr = host->ucr; 96 int err; 97 u8 trans_mode; 98 99 if (!buf) 100 buf_len = 0; 101 102 rtsx_usb_init_cmd(ucr); 103 if (cmd != NULL) { 104 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__ 105 , cmd->opcode); 106 if (cmd->opcode == MMC_SEND_TUNING_BLOCK) 107 trans_mode = SD_TM_AUTO_TUNING; 108 else 109 trans_mode = SD_TM_NORMAL_READ; 110 111 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 112 SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40); 113 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 114 SD_CMD1, 0xFF, (u8)(cmd->arg >> 24)); 115 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 116 SD_CMD2, 0xFF, (u8)(cmd->arg >> 16)); 117 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 118 SD_CMD3, 0xFF, (u8)(cmd->arg >> 8)); 119 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 120 SD_CMD4, 0xFF, (u8)cmd->arg); 121 } else { 122 trans_mode = SD_TM_AUTO_READ_3; 123 } 124 125 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt); 126 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 127 0xFF, (u8)(byte_cnt >> 8)); 128 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1); 129 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0); 130 131 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, 132 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 | 133 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6); 134 if (trans_mode != SD_TM_AUTO_TUNING) 135 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 136 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER); 137 138 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 139 0xFF, trans_mode | SD_TRANSFER_START); 140 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, 141 SD_TRANSFER_END, SD_TRANSFER_END); 142 143 if (cmd != NULL) { 144 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0); 145 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0); 146 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0); 147 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0); 148 } 149 150 err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout); 151 if (err) { 152 dev_dbg(sdmmc_dev(host), 153 "rtsx_usb_send_cmd failed (err = %d)\n", err); 154 return err; 155 } 156 157 err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout); 158 if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) { 159 sd_print_debug_regs(host); 160 161 if (!err) { 162 dev_dbg(sdmmc_dev(host), 163 "Transfer failed (SD_TRANSFER = %02x)\n", 164 ucr->rsp_buf[0]); 165 err = -EIO; 166 } else { 167 dev_dbg(sdmmc_dev(host), 168 "rtsx_usb_get_rsp failed (err = %d)\n", err); 169 } 170 171 return err; 172 } 173 174 if (cmd != NULL) { 175 cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1); 176 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n", 177 cmd->resp[0]); 178 } 179 180 if (buf && buf_len) { 181 /* 2-byte aligned part */ 182 err = rtsx_usb_read_ppbuf(ucr, buf, byte_cnt - (byte_cnt % 2)); 183 if (err) { 184 dev_dbg(sdmmc_dev(host), 185 "rtsx_usb_read_ppbuf failed (err = %d)\n", err); 186 return err; 187 } 188 189 /* unaligned byte */ 190 if (byte_cnt % 2) 191 return rtsx_usb_read_register(ucr, 192 PPBUF_BASE2 + byte_cnt, 193 buf + byte_cnt - 1); 194 } 195 196 return 0; 197 } 198 199 static int sd_write_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd, 200 u16 byte_cnt, u8 *buf, int buf_len, int timeout) 201 { 202 struct rtsx_ucr *ucr = host->ucr; 203 int err; 204 u8 trans_mode; 205 206 if (!buf) 207 buf_len = 0; 208 209 if (buf && buf_len) { 210 err = rtsx_usb_write_ppbuf(ucr, buf, buf_len); 211 if (err) { 212 dev_dbg(sdmmc_dev(host), 213 "rtsx_usb_write_ppbuf failed (err = %d)\n", 214 err); 215 return err; 216 } 217 } 218 219 trans_mode = (cmd != NULL) ? SD_TM_AUTO_WRITE_2 : SD_TM_AUTO_WRITE_3; 220 rtsx_usb_init_cmd(ucr); 221 222 if (cmd != NULL) { 223 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__, 224 cmd->opcode); 225 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 226 SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40); 227 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 228 SD_CMD1, 0xFF, (u8)(cmd->arg >> 24)); 229 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 230 SD_CMD2, 0xFF, (u8)(cmd->arg >> 16)); 231 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 232 SD_CMD3, 0xFF, (u8)(cmd->arg >> 8)); 233 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 234 SD_CMD4, 0xFF, (u8)cmd->arg); 235 } 236 237 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt); 238 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 239 0xFF, (u8)(byte_cnt >> 8)); 240 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1); 241 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0); 242 243 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, 244 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 | 245 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6); 246 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 247 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER); 248 249 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF, 250 trans_mode | SD_TRANSFER_START); 251 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, 252 SD_TRANSFER_END, SD_TRANSFER_END); 253 254 if (cmd != NULL) { 255 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0); 256 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0); 257 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0); 258 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0); 259 } 260 261 err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout); 262 if (err) { 263 dev_dbg(sdmmc_dev(host), 264 "rtsx_usb_send_cmd failed (err = %d)\n", err); 265 return err; 266 } 267 268 err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout); 269 if (err) { 270 sd_print_debug_regs(host); 271 dev_dbg(sdmmc_dev(host), 272 "rtsx_usb_get_rsp failed (err = %d)\n", err); 273 return err; 274 } 275 276 if (cmd != NULL) { 277 cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1); 278 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n", 279 cmd->resp[0]); 280 } 281 282 return 0; 283 } 284 285 static void sd_send_cmd_get_rsp(struct rtsx_usb_sdmmc *host, 286 struct mmc_command *cmd) 287 { 288 struct rtsx_ucr *ucr = host->ucr; 289 u8 cmd_idx = (u8)cmd->opcode; 290 u32 arg = cmd->arg; 291 int err = 0; 292 int timeout = 100; 293 int i; 294 u8 *ptr; 295 int stat_idx = 0; 296 int len = 2; 297 u8 rsp_type; 298 299 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n", 300 __func__, cmd_idx, arg); 301 302 /* Response type: 303 * R0 304 * R1, R5, R6, R7 305 * R1b 306 * R2 307 * R3, R4 308 */ 309 switch (mmc_resp_type(cmd)) { 310 case MMC_RSP_NONE: 311 rsp_type = SD_RSP_TYPE_R0; 312 break; 313 case MMC_RSP_R1: 314 rsp_type = SD_RSP_TYPE_R1; 315 break; 316 case MMC_RSP_R1_NO_CRC: 317 rsp_type = SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7; 318 break; 319 case MMC_RSP_R1B: 320 rsp_type = SD_RSP_TYPE_R1b; 321 break; 322 case MMC_RSP_R2: 323 rsp_type = SD_RSP_TYPE_R2; 324 break; 325 case MMC_RSP_R3: 326 rsp_type = SD_RSP_TYPE_R3; 327 break; 328 default: 329 dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n"); 330 err = -EINVAL; 331 goto out; 332 } 333 334 if (rsp_type == SD_RSP_TYPE_R1b) 335 timeout = cmd->busy_timeout ? cmd->busy_timeout : 3000; 336 337 if (cmd->opcode == SD_SWITCH_VOLTAGE) { 338 err = rtsx_usb_write_register(ucr, SD_BUS_STAT, 339 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 340 SD_CLK_TOGGLE_EN); 341 if (err) 342 goto out; 343 } 344 345 rtsx_usb_init_cmd(ucr); 346 347 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx); 348 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24)); 349 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16)); 350 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8)); 351 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg); 352 353 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type); 354 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE, 355 0x01, PINGPONG_BUFFER); 356 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 357 0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START); 358 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, 359 SD_TRANSFER_END | SD_STAT_IDLE, 360 SD_TRANSFER_END | SD_STAT_IDLE); 361 362 if (rsp_type == SD_RSP_TYPE_R2) { 363 /* Read data from ping-pong buffer */ 364 for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++) 365 rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0); 366 stat_idx = 16; 367 } else if (rsp_type != SD_RSP_TYPE_R0) { 368 /* Read data from SD_CMDx registers */ 369 for (i = SD_CMD0; i <= SD_CMD4; i++) 370 rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0); 371 stat_idx = 5; 372 } 373 len += stat_idx; 374 375 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_STAT1, 0, 0); 376 377 err = rtsx_usb_send_cmd(ucr, MODE_CR, 100); 378 if (err) { 379 dev_dbg(sdmmc_dev(host), 380 "rtsx_usb_send_cmd error (err = %d)\n", err); 381 goto out; 382 } 383 384 err = rtsx_usb_get_rsp(ucr, len, timeout); 385 if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) { 386 sd_print_debug_regs(host); 387 sd_clear_error(host); 388 389 if (!err) { 390 dev_dbg(sdmmc_dev(host), 391 "Transfer failed (SD_TRANSFER = %02x)\n", 392 ucr->rsp_buf[0]); 393 err = -EIO; 394 } else { 395 dev_dbg(sdmmc_dev(host), 396 "rtsx_usb_get_rsp failed (err = %d)\n", err); 397 } 398 399 goto out; 400 } 401 402 if (rsp_type == SD_RSP_TYPE_R0) { 403 err = 0; 404 goto out; 405 } 406 407 /* Skip result of CHECK_REG_CMD */ 408 ptr = ucr->rsp_buf + 1; 409 410 /* Check (Start,Transmission) bit of Response */ 411 if ((ptr[0] & 0xC0) != 0) { 412 err = -EILSEQ; 413 dev_dbg(sdmmc_dev(host), "Invalid response bit\n"); 414 goto out; 415 } 416 417 /* Check CRC7 */ 418 if (!(rsp_type & SD_NO_CHECK_CRC7)) { 419 if (ptr[stat_idx] & SD_CRC7_ERR) { 420 err = -EILSEQ; 421 dev_dbg(sdmmc_dev(host), "CRC7 error\n"); 422 goto out; 423 } 424 } 425 426 if (rsp_type == SD_RSP_TYPE_R2) { 427 /* 428 * The controller offloads the last byte {CRC-7, end bit 1'b1} 429 * of response type R2. Assign dummy CRC, 0, and end bit to the 430 * byte(ptr[16], goes into the LSB of resp[3] later). 431 */ 432 ptr[16] = 1; 433 434 for (i = 0; i < 4; i++) { 435 cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4); 436 dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n", 437 i, cmd->resp[i]); 438 } 439 } else { 440 cmd->resp[0] = get_unaligned_be32(ptr + 1); 441 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n", 442 cmd->resp[0]); 443 } 444 445 out: 446 cmd->error = err; 447 } 448 449 static int sd_rw_multi(struct rtsx_usb_sdmmc *host, struct mmc_request *mrq) 450 { 451 struct rtsx_ucr *ucr = host->ucr; 452 struct mmc_data *data = mrq->data; 453 int read = (data->flags & MMC_DATA_READ) ? 1 : 0; 454 u8 cfg2, trans_mode; 455 int err; 456 u8 flag; 457 size_t data_len = data->blksz * data->blocks; 458 unsigned int pipe; 459 460 if (read) { 461 dev_dbg(sdmmc_dev(host), "%s: read %zu bytes\n", 462 __func__, data_len); 463 cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 | 464 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0; 465 trans_mode = SD_TM_AUTO_READ_3; 466 } else { 467 dev_dbg(sdmmc_dev(host), "%s: write %zu bytes\n", 468 __func__, data_len); 469 cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 | 470 SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0; 471 trans_mode = SD_TM_AUTO_WRITE_3; 472 } 473 474 rtsx_usb_init_cmd(ucr); 475 476 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00); 477 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02); 478 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 479 0xFF, (u8)data->blocks); 480 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 481 0xFF, (u8)(data->blocks >> 8)); 482 483 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE, 484 0x01, RING_BUFFER); 485 486 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3, 487 0xFF, (u8)(data_len >> 24)); 488 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2, 489 0xFF, (u8)(data_len >> 16)); 490 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1, 491 0xFF, (u8)(data_len >> 8)); 492 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0, 493 0xFF, (u8)data_len); 494 if (read) { 495 flag = MODE_CDIR; 496 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL, 497 0x03 | DMA_PACK_SIZE_MASK, 498 DMA_DIR_FROM_CARD | DMA_EN | DMA_512); 499 } else { 500 flag = MODE_CDOR; 501 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL, 502 0x03 | DMA_PACK_SIZE_MASK, 503 DMA_DIR_TO_CARD | DMA_EN | DMA_512); 504 } 505 506 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2); 507 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF, 508 trans_mode | SD_TRANSFER_START); 509 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, 510 SD_TRANSFER_END, SD_TRANSFER_END); 511 512 err = rtsx_usb_send_cmd(ucr, flag, 100); 513 if (err) 514 return err; 515 516 if (read) 517 pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN); 518 else 519 pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT); 520 521 err = rtsx_usb_transfer_data(ucr, pipe, data->sg, data_len, 522 data->sg_len, NULL, 10000); 523 if (err) { 524 dev_dbg(sdmmc_dev(host), "rtsx_usb_transfer_data error %d\n" 525 , err); 526 sd_clear_error(host); 527 return err; 528 } 529 530 return rtsx_usb_get_rsp(ucr, 1, 2000); 531 } 532 533 static inline void sd_enable_initial_mode(struct rtsx_usb_sdmmc *host) 534 { 535 rtsx_usb_write_register(host->ucr, SD_CFG1, 536 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128); 537 } 538 539 static inline void sd_disable_initial_mode(struct rtsx_usb_sdmmc *host) 540 { 541 rtsx_usb_write_register(host->ucr, SD_CFG1, 542 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0); 543 } 544 545 static void sd_normal_rw(struct rtsx_usb_sdmmc *host, 546 struct mmc_request *mrq) 547 { 548 struct mmc_command *cmd = mrq->cmd; 549 struct mmc_data *data = mrq->data; 550 u8 *buf; 551 552 buf = kzalloc(data->blksz, GFP_NOIO); 553 if (!buf) { 554 cmd->error = -ENOMEM; 555 return; 556 } 557 558 if (data->flags & MMC_DATA_READ) { 559 if (host->initial_mode) 560 sd_disable_initial_mode(host); 561 562 cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf, 563 data->blksz, 200); 564 565 if (host->initial_mode) 566 sd_enable_initial_mode(host); 567 568 sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz); 569 } else { 570 sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz); 571 572 cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf, 573 data->blksz, 200); 574 } 575 576 kfree(buf); 577 } 578 579 static int sd_change_phase(struct rtsx_usb_sdmmc *host, u8 sample_point, int tx) 580 { 581 struct rtsx_ucr *ucr = host->ucr; 582 int err; 583 584 dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n", 585 __func__, tx ? "TX" : "RX", sample_point); 586 587 rtsx_usb_init_cmd(ucr); 588 589 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE); 590 591 if (tx) 592 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, 593 0x0F, sample_point); 594 else 595 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL, 596 0x0F, sample_point); 597 598 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0); 599 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, 600 PHASE_NOT_RESET, PHASE_NOT_RESET); 601 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0); 602 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0); 603 604 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 605 if (err) 606 return err; 607 608 return 0; 609 } 610 611 static inline u32 get_phase_point(u32 phase_map, unsigned int idx) 612 { 613 idx &= MAX_PHASE; 614 return phase_map & (1 << idx); 615 } 616 617 static int get_phase_len(u32 phase_map, unsigned int idx) 618 { 619 int i; 620 621 for (i = 0; i < MAX_PHASE + 1; i++) { 622 if (get_phase_point(phase_map, idx + i) == 0) 623 return i; 624 } 625 return MAX_PHASE + 1; 626 } 627 628 static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map) 629 { 630 int start = 0, len = 0; 631 int start_final = 0, len_final = 0; 632 u8 final_phase = 0xFF; 633 634 if (phase_map == 0) { 635 dev_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map); 636 return final_phase; 637 } 638 639 while (start < MAX_PHASE + 1) { 640 len = get_phase_len(phase_map, start); 641 if (len_final < len) { 642 start_final = start; 643 len_final = len; 644 } 645 start += len ? len : 1; 646 } 647 648 final_phase = (start_final + len_final / 2) & MAX_PHASE; 649 dev_dbg(sdmmc_dev(host), "Phase: [map:%x] [maxlen:%d] [final:%d]\n", 650 phase_map, len_final, final_phase); 651 652 return final_phase; 653 } 654 655 static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host) 656 { 657 int err, i; 658 u8 val = 0; 659 660 for (i = 0; i < 100; i++) { 661 err = rtsx_usb_ep0_read_register(host->ucr, 662 SD_DATA_STATE, &val); 663 if (val & SD_DATA_IDLE) 664 return; 665 666 usleep_range(100, 1000); 667 } 668 } 669 670 static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host, 671 u8 opcode, u8 sample_point) 672 { 673 int err; 674 struct mmc_command cmd = {}; 675 676 err = sd_change_phase(host, sample_point, 0); 677 if (err) 678 return err; 679 680 cmd.opcode = MMC_SEND_TUNING_BLOCK; 681 err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100); 682 if (err) { 683 /* Wait till SD DATA IDLE */ 684 sd_wait_data_idle(host); 685 sd_clear_error(host); 686 return err; 687 } 688 689 return 0; 690 } 691 692 static void sd_tuning_phase(struct rtsx_usb_sdmmc *host, 693 u8 opcode, u16 *phase_map) 694 { 695 int err, i; 696 u16 raw_phase_map = 0; 697 698 for (i = MAX_PHASE; i >= 0; i--) { 699 err = sd_tuning_rx_cmd(host, opcode, (u8)i); 700 if (!err) 701 raw_phase_map |= 1 << i; 702 } 703 704 if (phase_map) 705 *phase_map = raw_phase_map; 706 } 707 708 static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode) 709 { 710 int err, i; 711 u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map; 712 u8 final_phase; 713 714 /* setting fixed default TX phase */ 715 err = sd_change_phase(host, 0x01, 1); 716 if (err) { 717 dev_dbg(sdmmc_dev(host), "TX phase setting failed\n"); 718 return err; 719 } 720 721 /* tuning RX phase */ 722 for (i = 0; i < RX_TUNING_CNT; i++) { 723 sd_tuning_phase(host, opcode, &(raw_phase_map[i])); 724 725 if (raw_phase_map[i] == 0) 726 break; 727 } 728 729 phase_map = 0xFFFF; 730 for (i = 0; i < RX_TUNING_CNT; i++) { 731 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n", 732 i, raw_phase_map[i]); 733 phase_map &= raw_phase_map[i]; 734 } 735 dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\n", phase_map); 736 737 if (phase_map) { 738 final_phase = sd_search_final_phase(host, phase_map); 739 if (final_phase == 0xFF) 740 return -EINVAL; 741 742 err = sd_change_phase(host, final_phase, 0); 743 if (err) 744 return err; 745 } else { 746 return -EINVAL; 747 } 748 749 return 0; 750 } 751 752 static int sdmmc_get_ro(struct mmc_host *mmc) 753 { 754 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 755 struct rtsx_ucr *ucr = host->ucr; 756 int err; 757 u16 val; 758 759 if (host->host_removal) 760 return -ENOMEDIUM; 761 762 mutex_lock(&ucr->dev_mutex); 763 764 /* Check SD card detect */ 765 err = rtsx_usb_get_card_status(ucr, &val); 766 767 mutex_unlock(&ucr->dev_mutex); 768 769 770 /* Treat failed detection as non-ro */ 771 if (err) 772 return 0; 773 774 if (val & SD_WP) 775 return 1; 776 777 return 0; 778 } 779 780 static int sdmmc_get_cd(struct mmc_host *mmc) 781 { 782 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 783 struct rtsx_ucr *ucr = host->ucr; 784 int err; 785 u16 val; 786 787 if (host->host_removal) 788 return -ENOMEDIUM; 789 790 mutex_lock(&ucr->dev_mutex); 791 792 /* Check SD card detect */ 793 err = rtsx_usb_get_card_status(ucr, &val); 794 795 mutex_unlock(&ucr->dev_mutex); 796 797 /* Treat failed detection as non-exist */ 798 if (err) 799 goto no_card; 800 801 if (val & SD_CD) { 802 host->card_exist = true; 803 return 1; 804 } 805 806 no_card: 807 host->card_exist = false; 808 return 0; 809 } 810 811 static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq) 812 { 813 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 814 struct rtsx_ucr *ucr = host->ucr; 815 struct mmc_command *cmd = mrq->cmd; 816 struct mmc_data *data = mrq->data; 817 unsigned int data_size = 0; 818 819 dev_dbg(sdmmc_dev(host), "%s\n", __func__); 820 821 if (host->host_removal) { 822 cmd->error = -ENOMEDIUM; 823 goto finish; 824 } 825 826 if ((!host->card_exist)) { 827 cmd->error = -ENOMEDIUM; 828 goto finish_detect_card; 829 } 830 831 mutex_lock(&ucr->dev_mutex); 832 833 mutex_lock(&host->host_mutex); 834 host->mrq = mrq; 835 mutex_unlock(&host->host_mutex); 836 837 if (mrq->data) 838 data_size = data->blocks * data->blksz; 839 840 if (!data_size) { 841 sd_send_cmd_get_rsp(host, cmd); 842 } else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) || 843 mmc_op_multi(cmd->opcode)) { 844 sd_send_cmd_get_rsp(host, cmd); 845 846 if (!cmd->error) { 847 sd_rw_multi(host, mrq); 848 849 if (mmc_op_multi(cmd->opcode) && mrq->stop) { 850 sd_send_cmd_get_rsp(host, mrq->stop); 851 rtsx_usb_write_register(ucr, MC_FIFO_CTL, 852 FIFO_FLUSH, FIFO_FLUSH); 853 } 854 } 855 } else { 856 sd_normal_rw(host, mrq); 857 } 858 859 if (mrq->data) { 860 if (cmd->error || data->error) 861 data->bytes_xfered = 0; 862 else 863 data->bytes_xfered = data->blocks * data->blksz; 864 } 865 866 mutex_unlock(&ucr->dev_mutex); 867 868 finish_detect_card: 869 if (cmd->error) { 870 /* 871 * detect card when fail to update card existence state and 872 * speed up card removal when retry 873 */ 874 sdmmc_get_cd(mmc); 875 dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error); 876 } 877 878 finish: 879 mutex_lock(&host->host_mutex); 880 host->mrq = NULL; 881 mutex_unlock(&host->host_mutex); 882 883 mmc_request_done(mmc, mrq); 884 } 885 886 static int sd_set_bus_width(struct rtsx_usb_sdmmc *host, 887 unsigned char bus_width) 888 { 889 int err = 0; 890 static const u8 width[] = { 891 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT, 892 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT, 893 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT, 894 }; 895 896 if (bus_width <= MMC_BUS_WIDTH_8) 897 err = rtsx_usb_write_register(host->ucr, SD_CFG1, 898 0x03, width[bus_width]); 899 900 return err; 901 } 902 903 static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr) 904 { 905 rtsx_usb_init_cmd(ucr); 906 907 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55); 908 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55); 909 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95); 910 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); 911 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55); 912 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5); 913 914 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 915 } 916 917 static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr) 918 { 919 rtsx_usb_init_cmd(ucr); 920 921 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65); 922 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55); 923 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95); 924 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); 925 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56); 926 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59); 927 928 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 929 } 930 931 static int sd_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr) 932 { 933 rtsx_usb_init_cmd(ucr); 934 935 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA); 936 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA); 937 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9); 938 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); 939 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55); 940 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5); 941 942 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 943 } 944 945 static int sd_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr) 946 { 947 rtsx_usb_init_cmd(ucr); 948 949 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5); 950 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A); 951 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5); 952 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A); 953 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65); 954 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A); 955 956 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 957 } 958 959 static int sd_power_on(struct rtsx_usb_sdmmc *host) 960 { 961 struct rtsx_ucr *ucr = host->ucr; 962 int err; 963 964 dev_dbg(sdmmc_dev(host), "%s\n", __func__); 965 rtsx_usb_init_cmd(ucr); 966 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL); 967 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE, 968 CARD_SHARE_MASK, CARD_SHARE_SD); 969 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, 970 SD_CLK_EN, SD_CLK_EN); 971 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 972 if (err) 973 return err; 974 975 if (CHECK_PKG(ucr, LQFP48)) 976 err = sd_pull_ctl_enable_lqfp48(ucr); 977 else 978 err = sd_pull_ctl_enable_qfn24(ucr); 979 if (err) 980 return err; 981 982 err = rtsx_usb_write_register(ucr, CARD_PWR_CTL, 983 POWER_MASK, PARTIAL_POWER_ON); 984 if (err) 985 return err; 986 987 usleep_range(800, 1000); 988 989 rtsx_usb_init_cmd(ucr); 990 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, 991 POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON); 992 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, 993 SD_OUTPUT_EN, SD_OUTPUT_EN); 994 995 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 996 } 997 998 static int sd_power_off(struct rtsx_usb_sdmmc *host) 999 { 1000 struct rtsx_ucr *ucr = host->ucr; 1001 int err; 1002 1003 dev_dbg(sdmmc_dev(host), "%s\n", __func__); 1004 rtsx_usb_init_cmd(ucr); 1005 1006 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0); 1007 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0); 1008 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, 1009 POWER_MASK, POWER_OFF); 1010 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, 1011 POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND); 1012 1013 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 1014 if (err) 1015 return err; 1016 1017 if (CHECK_PKG(ucr, LQFP48)) 1018 return sd_pull_ctl_disable_lqfp48(ucr); 1019 return sd_pull_ctl_disable_qfn24(ucr); 1020 } 1021 1022 static int sd_set_power_mode(struct rtsx_usb_sdmmc *host, 1023 unsigned char power_mode) 1024 { 1025 int err; 1026 1027 if (power_mode != MMC_POWER_OFF) 1028 power_mode = MMC_POWER_ON; 1029 1030 if (power_mode == host->power_mode) 1031 return 0; 1032 1033 if (power_mode == MMC_POWER_OFF) { 1034 err = sd_power_off(host); 1035 pm_runtime_put_noidle(sdmmc_dev(host)); 1036 } else { 1037 pm_runtime_get_noresume(sdmmc_dev(host)); 1038 err = sd_power_on(host); 1039 } 1040 1041 if (!err) 1042 host->power_mode = power_mode; 1043 1044 return err; 1045 } 1046 1047 static int sd_set_timing(struct rtsx_usb_sdmmc *host, 1048 unsigned char timing, bool *ddr_mode) 1049 { 1050 struct rtsx_ucr *ucr = host->ucr; 1051 int err; 1052 1053 *ddr_mode = false; 1054 1055 rtsx_usb_init_cmd(ucr); 1056 1057 switch (timing) { 1058 case MMC_TIMING_UHS_SDR104: 1059 case MMC_TIMING_UHS_SDR50: 1060 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, 1061 0x0C | SD_ASYNC_FIFO_RST, 1062 SD_30_MODE | SD_ASYNC_FIFO_RST); 1063 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, 1064 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1); 1065 break; 1066 1067 case MMC_TIMING_UHS_DDR50: 1068 *ddr_mode = true; 1069 1070 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, 1071 0x0C | SD_ASYNC_FIFO_RST, 1072 SD_DDR_MODE | SD_ASYNC_FIFO_RST); 1073 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, 1074 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1); 1075 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL, 1076 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT); 1077 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL, 1078 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD, 1079 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD); 1080 break; 1081 1082 case MMC_TIMING_MMC_HS: 1083 case MMC_TIMING_SD_HS: 1084 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, 1085 0x0C, SD_20_MODE); 1086 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, 1087 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1); 1088 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL, 1089 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD); 1090 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL, 1091 SD20_RX_SEL_MASK, SD20_RX_14_DELAY); 1092 break; 1093 1094 default: 1095 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 1096 SD_CFG1, 0x0C, SD_20_MODE); 1097 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, 1098 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1); 1099 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 1100 SD_PUSH_POINT_CTL, 0xFF, 0); 1101 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL, 1102 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE); 1103 break; 1104 } 1105 1106 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 1107 1108 return err; 1109 } 1110 1111 static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 1112 { 1113 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 1114 struct rtsx_ucr *ucr = host->ucr; 1115 1116 dev_dbg(sdmmc_dev(host), "%s\n", __func__); 1117 mutex_lock(&ucr->dev_mutex); 1118 1119 sd_set_power_mode(host, ios->power_mode); 1120 sd_set_bus_width(host, ios->bus_width); 1121 sd_set_timing(host, ios->timing, &host->ddr_mode); 1122 1123 host->vpclk = false; 1124 host->double_clk = true; 1125 1126 switch (ios->timing) { 1127 case MMC_TIMING_UHS_SDR104: 1128 case MMC_TIMING_UHS_SDR50: 1129 host->ssc_depth = SSC_DEPTH_2M; 1130 host->vpclk = true; 1131 host->double_clk = false; 1132 break; 1133 case MMC_TIMING_UHS_DDR50: 1134 case MMC_TIMING_UHS_SDR25: 1135 host->ssc_depth = SSC_DEPTH_1M; 1136 break; 1137 default: 1138 host->ssc_depth = SSC_DEPTH_512K; 1139 break; 1140 } 1141 1142 host->initial_mode = (ios->clock <= 1000000) ? true : false; 1143 host->clock = ios->clock; 1144 1145 rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth, 1146 host->initial_mode, host->double_clk, host->vpclk); 1147 1148 mutex_unlock(&ucr->dev_mutex); 1149 dev_dbg(sdmmc_dev(host), "%s end\n", __func__); 1150 } 1151 1152 static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) 1153 { 1154 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 1155 struct rtsx_ucr *ucr = host->ucr; 1156 int err = 0; 1157 1158 dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n", 1159 __func__, ios->signal_voltage); 1160 1161 if (host->host_removal) 1162 return -ENOMEDIUM; 1163 1164 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120) 1165 return -EPERM; 1166 1167 mutex_lock(&ucr->dev_mutex); 1168 1169 err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD); 1170 if (err) { 1171 mutex_unlock(&ucr->dev_mutex); 1172 return err; 1173 } 1174 1175 /* Let mmc core do the busy checking, simply stop the forced-toggle 1176 * clock(while issuing CMD11) and switch voltage. 1177 */ 1178 rtsx_usb_init_cmd(ucr); 1179 1180 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 1181 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL, 1182 SD_IO_USING_1V8, SD_IO_USING_3V3); 1183 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG, 1184 TUNE_SD18_MASK, TUNE_SD18_3V3); 1185 } else { 1186 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT, 1187 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 1188 SD_CLK_FORCE_STOP); 1189 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL, 1190 SD_IO_USING_1V8, SD_IO_USING_1V8); 1191 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG, 1192 TUNE_SD18_MASK, TUNE_SD18_1V8); 1193 } 1194 1195 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 1196 mutex_unlock(&ucr->dev_mutex); 1197 1198 return err; 1199 } 1200 1201 static int sdmmc_card_busy(struct mmc_host *mmc) 1202 { 1203 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 1204 struct rtsx_ucr *ucr = host->ucr; 1205 int err; 1206 u8 stat; 1207 u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS 1208 | SD_DAT0_STATUS; 1209 1210 dev_dbg(sdmmc_dev(host), "%s\n", __func__); 1211 1212 mutex_lock(&ucr->dev_mutex); 1213 1214 err = rtsx_usb_write_register(ucr, SD_BUS_STAT, 1215 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 1216 SD_CLK_TOGGLE_EN); 1217 if (err) 1218 goto out; 1219 1220 mdelay(1); 1221 1222 err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat); 1223 if (err) 1224 goto out; 1225 1226 err = rtsx_usb_write_register(ucr, SD_BUS_STAT, 1227 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0); 1228 out: 1229 mutex_unlock(&ucr->dev_mutex); 1230 1231 if (err) 1232 return err; 1233 1234 /* check if any pin between dat[0:3] is low */ 1235 if ((stat & mask) != mask) 1236 return 1; 1237 else 1238 return 0; 1239 } 1240 1241 static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode) 1242 { 1243 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 1244 struct rtsx_ucr *ucr = host->ucr; 1245 int err = 0; 1246 1247 if (host->host_removal) 1248 return -ENOMEDIUM; 1249 1250 mutex_lock(&ucr->dev_mutex); 1251 1252 if (!host->ddr_mode) 1253 err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK); 1254 1255 mutex_unlock(&ucr->dev_mutex); 1256 1257 return err; 1258 } 1259 1260 static const struct mmc_host_ops rtsx_usb_sdmmc_ops = { 1261 .request = sdmmc_request, 1262 .set_ios = sdmmc_set_ios, 1263 .get_ro = sdmmc_get_ro, 1264 .get_cd = sdmmc_get_cd, 1265 .start_signal_voltage_switch = sdmmc_switch_voltage, 1266 .card_busy = sdmmc_card_busy, 1267 .execute_tuning = sdmmc_execute_tuning, 1268 }; 1269 1270 #ifdef RTSX_USB_USE_LEDS_CLASS 1271 static void rtsx_usb_led_control(struct led_classdev *led, 1272 enum led_brightness brightness) 1273 { 1274 struct rtsx_usb_sdmmc *host = container_of(led, 1275 struct rtsx_usb_sdmmc, led); 1276 1277 if (host->host_removal) 1278 return; 1279 1280 host->led.brightness = brightness; 1281 schedule_work(&host->led_work); 1282 } 1283 1284 static void rtsx_usb_update_led(struct work_struct *work) 1285 { 1286 struct rtsx_usb_sdmmc *host = 1287 container_of(work, struct rtsx_usb_sdmmc, led_work); 1288 struct rtsx_ucr *ucr = host->ucr; 1289 1290 pm_runtime_get_noresume(sdmmc_dev(host)); 1291 mutex_lock(&ucr->dev_mutex); 1292 1293 if (host->power_mode == MMC_POWER_OFF) 1294 goto out; 1295 1296 if (host->led.brightness == LED_OFF) 1297 rtsx_usb_turn_off_led(ucr); 1298 else 1299 rtsx_usb_turn_on_led(ucr); 1300 1301 out: 1302 mutex_unlock(&ucr->dev_mutex); 1303 pm_runtime_put_sync_suspend(sdmmc_dev(host)); 1304 } 1305 #endif 1306 1307 static void rtsx_usb_init_host(struct rtsx_usb_sdmmc *host) 1308 { 1309 struct mmc_host *mmc = host->mmc; 1310 1311 mmc->f_min = 250000; 1312 mmc->f_max = 208000000; 1313 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; 1314 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED | 1315 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST | 1316 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 | 1317 MMC_CAP_SYNC_RUNTIME_PM; 1318 mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE | 1319 MMC_CAP2_NO_SDIO; 1320 1321 mmc->max_current_330 = 400; 1322 mmc->max_current_180 = 800; 1323 mmc->ops = &rtsx_usb_sdmmc_ops; 1324 mmc->max_segs = 256; 1325 mmc->max_seg_size = 65536; 1326 mmc->max_blk_size = 512; 1327 mmc->max_blk_count = 65535; 1328 mmc->max_req_size = 524288; 1329 1330 host->power_mode = MMC_POWER_OFF; 1331 } 1332 1333 static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev) 1334 { 1335 struct mmc_host *mmc; 1336 struct rtsx_usb_sdmmc *host; 1337 struct rtsx_ucr *ucr; 1338 #ifdef RTSX_USB_USE_LEDS_CLASS 1339 int err; 1340 #endif 1341 1342 ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent)); 1343 if (!ucr) 1344 return -ENXIO; 1345 1346 dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n"); 1347 1348 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev); 1349 if (!mmc) 1350 return -ENOMEM; 1351 1352 host = mmc_priv(mmc); 1353 host->ucr = ucr; 1354 host->mmc = mmc; 1355 host->pdev = pdev; 1356 platform_set_drvdata(pdev, host); 1357 1358 mutex_init(&host->host_mutex); 1359 rtsx_usb_init_host(host); 1360 pm_runtime_enable(&pdev->dev); 1361 1362 #ifdef RTSX_USB_USE_LEDS_CLASS 1363 snprintf(host->led_name, sizeof(host->led_name), 1364 "%s::", mmc_hostname(mmc)); 1365 host->led.name = host->led_name; 1366 host->led.brightness = LED_OFF; 1367 host->led.default_trigger = mmc_hostname(mmc); 1368 host->led.brightness_set = rtsx_usb_led_control; 1369 1370 err = led_classdev_register(mmc_dev(mmc), &host->led); 1371 if (err) 1372 dev_err(&(pdev->dev), 1373 "Failed to register LED device: %d\n", err); 1374 INIT_WORK(&host->led_work, rtsx_usb_update_led); 1375 1376 #endif 1377 mmc_add_host(mmc); 1378 1379 return 0; 1380 } 1381 1382 static int rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev) 1383 { 1384 struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev); 1385 struct mmc_host *mmc; 1386 1387 if (!host) 1388 return 0; 1389 1390 mmc = host->mmc; 1391 host->host_removal = true; 1392 1393 mutex_lock(&host->host_mutex); 1394 if (host->mrq) { 1395 dev_dbg(&(pdev->dev), 1396 "%s: Controller removed during transfer\n", 1397 mmc_hostname(mmc)); 1398 host->mrq->cmd->error = -ENOMEDIUM; 1399 if (host->mrq->stop) 1400 host->mrq->stop->error = -ENOMEDIUM; 1401 mmc_request_done(mmc, host->mrq); 1402 } 1403 mutex_unlock(&host->host_mutex); 1404 1405 mmc_remove_host(mmc); 1406 1407 #ifdef RTSX_USB_USE_LEDS_CLASS 1408 cancel_work_sync(&host->led_work); 1409 led_classdev_unregister(&host->led); 1410 #endif 1411 1412 mmc_free_host(mmc); 1413 pm_runtime_disable(&pdev->dev); 1414 platform_set_drvdata(pdev, NULL); 1415 1416 dev_dbg(&(pdev->dev), 1417 ": Realtek USB SD/MMC module has been removed\n"); 1418 1419 return 0; 1420 } 1421 1422 #ifdef CONFIG_PM 1423 static int rtsx_usb_sdmmc_runtime_suspend(struct device *dev) 1424 { 1425 struct rtsx_usb_sdmmc *host = dev_get_drvdata(dev); 1426 1427 host->mmc->caps &= ~MMC_CAP_NEEDS_POLL; 1428 return 0; 1429 } 1430 1431 static int rtsx_usb_sdmmc_runtime_resume(struct device *dev) 1432 { 1433 struct rtsx_usb_sdmmc *host = dev_get_drvdata(dev); 1434 1435 host->mmc->caps |= MMC_CAP_NEEDS_POLL; 1436 if (sdmmc_get_cd(host->mmc) == 1) 1437 mmc_detect_change(host->mmc, 0); 1438 return 0; 1439 } 1440 #endif 1441 1442 static const struct dev_pm_ops rtsx_usb_sdmmc_dev_pm_ops = { 1443 SET_RUNTIME_PM_OPS(rtsx_usb_sdmmc_runtime_suspend, 1444 rtsx_usb_sdmmc_runtime_resume, NULL) 1445 }; 1446 1447 static const struct platform_device_id rtsx_usb_sdmmc_ids[] = { 1448 { 1449 .name = "rtsx_usb_sdmmc", 1450 }, { 1451 /* sentinel */ 1452 } 1453 }; 1454 MODULE_DEVICE_TABLE(platform, rtsx_usb_sdmmc_ids); 1455 1456 static struct platform_driver rtsx_usb_sdmmc_driver = { 1457 .probe = rtsx_usb_sdmmc_drv_probe, 1458 .remove = rtsx_usb_sdmmc_drv_remove, 1459 .id_table = rtsx_usb_sdmmc_ids, 1460 .driver = { 1461 .name = "rtsx_usb_sdmmc", 1462 .pm = &rtsx_usb_sdmmc_dev_pm_ops, 1463 }, 1464 }; 1465 module_platform_driver(rtsx_usb_sdmmc_driver); 1466 1467 MODULE_LICENSE("GPL v2"); 1468 MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>"); 1469 MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver"); 1470