1 /* Realtek USB SD/MMC Card Interface driver 2 * 3 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 7 * as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License along 15 * with this program; if not, see <http://www.gnu.org/licenses/>. 16 * 17 * Author: 18 * Roger Tseng <rogerable@realtek.com> 19 */ 20 21 #include <linux/module.h> 22 #include <linux/slab.h> 23 #include <linux/delay.h> 24 #include <linux/platform_device.h> 25 #include <linux/usb.h> 26 #include <linux/mmc/host.h> 27 #include <linux/mmc/mmc.h> 28 #include <linux/mmc/sd.h> 29 #include <linux/mmc/sdio.h> 30 #include <linux/mmc/card.h> 31 #include <linux/scatterlist.h> 32 #include <linux/pm_runtime.h> 33 34 #include <linux/mfd/rtsx_usb.h> 35 #include <asm/unaligned.h> 36 37 #if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \ 38 defined(CONFIG_MMC_REALTEK_USB_MODULE)) 39 #include <linux/leds.h> 40 #include <linux/workqueue.h> 41 #define RTSX_USB_USE_LEDS_CLASS 42 #endif 43 44 struct rtsx_usb_sdmmc { 45 struct platform_device *pdev; 46 struct rtsx_ucr *ucr; 47 struct mmc_host *mmc; 48 struct mmc_request *mrq; 49 50 struct mutex host_mutex; 51 52 u8 ssc_depth; 53 unsigned int clock; 54 bool vpclk; 55 bool double_clk; 56 bool host_removal; 57 bool card_exist; 58 bool initial_mode; 59 bool ddr_mode; 60 61 unsigned char power_mode; 62 63 #ifdef RTSX_USB_USE_LEDS_CLASS 64 struct led_classdev led; 65 char led_name[32]; 66 struct work_struct led_work; 67 #endif 68 }; 69 70 static inline struct device *sdmmc_dev(struct rtsx_usb_sdmmc *host) 71 { 72 return &(host->pdev->dev); 73 } 74 75 static inline void sd_clear_error(struct rtsx_usb_sdmmc *host) 76 { 77 struct rtsx_ucr *ucr = host->ucr; 78 rtsx_usb_ep0_write_register(ucr, CARD_STOP, 79 SD_STOP | SD_CLR_ERR, 80 SD_STOP | SD_CLR_ERR); 81 82 rtsx_usb_clear_dma_err(ucr); 83 rtsx_usb_clear_fsm_err(ucr); 84 } 85 86 #ifdef DEBUG 87 static void sd_print_debug_regs(struct rtsx_usb_sdmmc *host) 88 { 89 struct rtsx_ucr *ucr = host->ucr; 90 u8 val = 0; 91 92 rtsx_usb_ep0_read_register(ucr, SD_STAT1, &val); 93 dev_dbg(sdmmc_dev(host), "SD_STAT1: 0x%x\n", val); 94 rtsx_usb_ep0_read_register(ucr, SD_STAT2, &val); 95 dev_dbg(sdmmc_dev(host), "SD_STAT2: 0x%x\n", val); 96 rtsx_usb_ep0_read_register(ucr, SD_BUS_STAT, &val); 97 dev_dbg(sdmmc_dev(host), "SD_BUS_STAT: 0x%x\n", val); 98 } 99 #else 100 #define sd_print_debug_regs(host) 101 #endif /* DEBUG */ 102 103 static int sd_read_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd, 104 u16 byte_cnt, u8 *buf, int buf_len, int timeout) 105 { 106 struct rtsx_ucr *ucr = host->ucr; 107 int err; 108 u8 trans_mode; 109 110 if (!buf) 111 buf_len = 0; 112 113 rtsx_usb_init_cmd(ucr); 114 if (cmd != NULL) { 115 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__ 116 , cmd->opcode); 117 if (cmd->opcode == MMC_SEND_TUNING_BLOCK) 118 trans_mode = SD_TM_AUTO_TUNING; 119 else 120 trans_mode = SD_TM_NORMAL_READ; 121 122 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 123 SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40); 124 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 125 SD_CMD1, 0xFF, (u8)(cmd->arg >> 24)); 126 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 127 SD_CMD2, 0xFF, (u8)(cmd->arg >> 16)); 128 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 129 SD_CMD3, 0xFF, (u8)(cmd->arg >> 8)); 130 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 131 SD_CMD4, 0xFF, (u8)cmd->arg); 132 } else { 133 trans_mode = SD_TM_AUTO_READ_3; 134 } 135 136 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt); 137 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 138 0xFF, (u8)(byte_cnt >> 8)); 139 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1); 140 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0); 141 142 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, 143 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 | 144 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6); 145 if (trans_mode != SD_TM_AUTO_TUNING) 146 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 147 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER); 148 149 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 150 0xFF, trans_mode | SD_TRANSFER_START); 151 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, 152 SD_TRANSFER_END, SD_TRANSFER_END); 153 154 if (cmd != NULL) { 155 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0); 156 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0); 157 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0); 158 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0); 159 } 160 161 err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout); 162 if (err) { 163 dev_dbg(sdmmc_dev(host), 164 "rtsx_usb_send_cmd failed (err = %d)\n", err); 165 return err; 166 } 167 168 err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout); 169 if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) { 170 sd_print_debug_regs(host); 171 172 if (!err) { 173 dev_dbg(sdmmc_dev(host), 174 "Transfer failed (SD_TRANSFER = %02x)\n", 175 ucr->rsp_buf[0]); 176 err = -EIO; 177 } else { 178 dev_dbg(sdmmc_dev(host), 179 "rtsx_usb_get_rsp failed (err = %d)\n", err); 180 } 181 182 return err; 183 } 184 185 if (cmd != NULL) { 186 cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1); 187 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n", 188 cmd->resp[0]); 189 } 190 191 if (buf && buf_len) { 192 /* 2-byte aligned part */ 193 err = rtsx_usb_read_ppbuf(ucr, buf, byte_cnt - (byte_cnt % 2)); 194 if (err) { 195 dev_dbg(sdmmc_dev(host), 196 "rtsx_usb_read_ppbuf failed (err = %d)\n", err); 197 return err; 198 } 199 200 /* unaligned byte */ 201 if (byte_cnt % 2) 202 return rtsx_usb_read_register(ucr, 203 PPBUF_BASE2 + byte_cnt, 204 buf + byte_cnt - 1); 205 } 206 207 return 0; 208 } 209 210 static int sd_write_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd, 211 u16 byte_cnt, u8 *buf, int buf_len, int timeout) 212 { 213 struct rtsx_ucr *ucr = host->ucr; 214 int err; 215 u8 trans_mode; 216 217 if (!buf) 218 buf_len = 0; 219 220 if (buf && buf_len) { 221 err = rtsx_usb_write_ppbuf(ucr, buf, buf_len); 222 if (err) { 223 dev_dbg(sdmmc_dev(host), 224 "rtsx_usb_write_ppbuf failed (err = %d)\n", 225 err); 226 return err; 227 } 228 } 229 230 trans_mode = (cmd != NULL) ? SD_TM_AUTO_WRITE_2 : SD_TM_AUTO_WRITE_3; 231 rtsx_usb_init_cmd(ucr); 232 233 if (cmd != NULL) { 234 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__, 235 cmd->opcode); 236 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 237 SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40); 238 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 239 SD_CMD1, 0xFF, (u8)(cmd->arg >> 24)); 240 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 241 SD_CMD2, 0xFF, (u8)(cmd->arg >> 16)); 242 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 243 SD_CMD3, 0xFF, (u8)(cmd->arg >> 8)); 244 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 245 SD_CMD4, 0xFF, (u8)cmd->arg); 246 } 247 248 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt); 249 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 250 0xFF, (u8)(byte_cnt >> 8)); 251 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1); 252 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0); 253 254 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, 255 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 | 256 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6); 257 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 258 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER); 259 260 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF, 261 trans_mode | SD_TRANSFER_START); 262 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, 263 SD_TRANSFER_END, SD_TRANSFER_END); 264 265 if (cmd != NULL) { 266 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0); 267 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0); 268 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0); 269 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0); 270 } 271 272 err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout); 273 if (err) { 274 dev_dbg(sdmmc_dev(host), 275 "rtsx_usb_send_cmd failed (err = %d)\n", err); 276 return err; 277 } 278 279 err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout); 280 if (err) { 281 sd_print_debug_regs(host); 282 dev_dbg(sdmmc_dev(host), 283 "rtsx_usb_get_rsp failed (err = %d)\n", err); 284 return err; 285 } 286 287 if (cmd != NULL) { 288 cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1); 289 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n", 290 cmd->resp[0]); 291 } 292 293 return 0; 294 } 295 296 static void sd_send_cmd_get_rsp(struct rtsx_usb_sdmmc *host, 297 struct mmc_command *cmd) 298 { 299 struct rtsx_ucr *ucr = host->ucr; 300 u8 cmd_idx = (u8)cmd->opcode; 301 u32 arg = cmd->arg; 302 int err = 0; 303 int timeout = 100; 304 int i; 305 u8 *ptr; 306 int stat_idx = 0; 307 int len = 2; 308 u8 rsp_type; 309 310 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n", 311 __func__, cmd_idx, arg); 312 313 /* Response type: 314 * R0 315 * R1, R5, R6, R7 316 * R1b 317 * R2 318 * R3, R4 319 */ 320 switch (mmc_resp_type(cmd)) { 321 case MMC_RSP_NONE: 322 rsp_type = SD_RSP_TYPE_R0; 323 break; 324 case MMC_RSP_R1: 325 rsp_type = SD_RSP_TYPE_R1; 326 break; 327 case MMC_RSP_R1 & ~MMC_RSP_CRC: 328 rsp_type = SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7; 329 break; 330 case MMC_RSP_R1B: 331 rsp_type = SD_RSP_TYPE_R1b; 332 break; 333 case MMC_RSP_R2: 334 rsp_type = SD_RSP_TYPE_R2; 335 break; 336 case MMC_RSP_R3: 337 rsp_type = SD_RSP_TYPE_R3; 338 break; 339 default: 340 dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n"); 341 err = -EINVAL; 342 goto out; 343 } 344 345 if (rsp_type == SD_RSP_TYPE_R1b) 346 timeout = 3000; 347 348 if (cmd->opcode == SD_SWITCH_VOLTAGE) { 349 err = rtsx_usb_write_register(ucr, SD_BUS_STAT, 350 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 351 SD_CLK_TOGGLE_EN); 352 if (err) 353 goto out; 354 } 355 356 rtsx_usb_init_cmd(ucr); 357 358 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx); 359 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24)); 360 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16)); 361 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8)); 362 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg); 363 364 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type); 365 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE, 366 0x01, PINGPONG_BUFFER); 367 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 368 0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START); 369 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, 370 SD_TRANSFER_END | SD_STAT_IDLE, 371 SD_TRANSFER_END | SD_STAT_IDLE); 372 373 if (rsp_type == SD_RSP_TYPE_R2) { 374 /* Read data from ping-pong buffer */ 375 for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++) 376 rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0); 377 stat_idx = 16; 378 } else if (rsp_type != SD_RSP_TYPE_R0) { 379 /* Read data from SD_CMDx registers */ 380 for (i = SD_CMD0; i <= SD_CMD4; i++) 381 rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0); 382 stat_idx = 5; 383 } 384 len += stat_idx; 385 386 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_STAT1, 0, 0); 387 388 err = rtsx_usb_send_cmd(ucr, MODE_CR, 100); 389 if (err) { 390 dev_dbg(sdmmc_dev(host), 391 "rtsx_usb_send_cmd error (err = %d)\n", err); 392 goto out; 393 } 394 395 err = rtsx_usb_get_rsp(ucr, len, timeout); 396 if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) { 397 sd_print_debug_regs(host); 398 sd_clear_error(host); 399 400 if (!err) { 401 dev_dbg(sdmmc_dev(host), 402 "Transfer failed (SD_TRANSFER = %02x)\n", 403 ucr->rsp_buf[0]); 404 err = -EIO; 405 } else { 406 dev_dbg(sdmmc_dev(host), 407 "rtsx_usb_get_rsp failed (err = %d)\n", err); 408 } 409 410 goto out; 411 } 412 413 if (rsp_type == SD_RSP_TYPE_R0) { 414 err = 0; 415 goto out; 416 } 417 418 /* Skip result of CHECK_REG_CMD */ 419 ptr = ucr->rsp_buf + 1; 420 421 /* Check (Start,Transmission) bit of Response */ 422 if ((ptr[0] & 0xC0) != 0) { 423 err = -EILSEQ; 424 dev_dbg(sdmmc_dev(host), "Invalid response bit\n"); 425 goto out; 426 } 427 428 /* Check CRC7 */ 429 if (!(rsp_type & SD_NO_CHECK_CRC7)) { 430 if (ptr[stat_idx] & SD_CRC7_ERR) { 431 err = -EILSEQ; 432 dev_dbg(sdmmc_dev(host), "CRC7 error\n"); 433 goto out; 434 } 435 } 436 437 if (rsp_type == SD_RSP_TYPE_R2) { 438 /* 439 * The controller offloads the last byte {CRC-7, end bit 1'b1} 440 * of response type R2. Assign dummy CRC, 0, and end bit to the 441 * byte(ptr[16], goes into the LSB of resp[3] later). 442 */ 443 ptr[16] = 1; 444 445 for (i = 0; i < 4; i++) { 446 cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4); 447 dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n", 448 i, cmd->resp[i]); 449 } 450 } else { 451 cmd->resp[0] = get_unaligned_be32(ptr + 1); 452 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n", 453 cmd->resp[0]); 454 } 455 456 out: 457 cmd->error = err; 458 } 459 460 static int sd_rw_multi(struct rtsx_usb_sdmmc *host, struct mmc_request *mrq) 461 { 462 struct rtsx_ucr *ucr = host->ucr; 463 struct mmc_data *data = mrq->data; 464 int read = (data->flags & MMC_DATA_READ) ? 1 : 0; 465 u8 cfg2, trans_mode; 466 int err; 467 u8 flag; 468 size_t data_len = data->blksz * data->blocks; 469 unsigned int pipe; 470 471 if (read) { 472 dev_dbg(sdmmc_dev(host), "%s: read %zu bytes\n", 473 __func__, data_len); 474 cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 | 475 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0; 476 trans_mode = SD_TM_AUTO_READ_3; 477 } else { 478 dev_dbg(sdmmc_dev(host), "%s: write %zu bytes\n", 479 __func__, data_len); 480 cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 | 481 SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0; 482 trans_mode = SD_TM_AUTO_WRITE_3; 483 } 484 485 rtsx_usb_init_cmd(ucr); 486 487 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00); 488 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02); 489 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 490 0xFF, (u8)data->blocks); 491 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 492 0xFF, (u8)(data->blocks >> 8)); 493 494 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE, 495 0x01, RING_BUFFER); 496 497 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3, 498 0xFF, (u8)(data_len >> 24)); 499 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2, 500 0xFF, (u8)(data_len >> 16)); 501 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1, 502 0xFF, (u8)(data_len >> 8)); 503 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0, 504 0xFF, (u8)data_len); 505 if (read) { 506 flag = MODE_CDIR; 507 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL, 508 0x03 | DMA_PACK_SIZE_MASK, 509 DMA_DIR_FROM_CARD | DMA_EN | DMA_512); 510 } else { 511 flag = MODE_CDOR; 512 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL, 513 0x03 | DMA_PACK_SIZE_MASK, 514 DMA_DIR_TO_CARD | DMA_EN | DMA_512); 515 } 516 517 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2); 518 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF, 519 trans_mode | SD_TRANSFER_START); 520 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, 521 SD_TRANSFER_END, SD_TRANSFER_END); 522 523 err = rtsx_usb_send_cmd(ucr, flag, 100); 524 if (err) 525 return err; 526 527 if (read) 528 pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN); 529 else 530 pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT); 531 532 err = rtsx_usb_transfer_data(ucr, pipe, data->sg, data_len, 533 data->sg_len, NULL, 10000); 534 if (err) { 535 dev_dbg(sdmmc_dev(host), "rtsx_usb_transfer_data error %d\n" 536 , err); 537 sd_clear_error(host); 538 return err; 539 } 540 541 return rtsx_usb_get_rsp(ucr, 1, 2000); 542 } 543 544 static inline void sd_enable_initial_mode(struct rtsx_usb_sdmmc *host) 545 { 546 rtsx_usb_write_register(host->ucr, SD_CFG1, 547 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128); 548 } 549 550 static inline void sd_disable_initial_mode(struct rtsx_usb_sdmmc *host) 551 { 552 rtsx_usb_write_register(host->ucr, SD_CFG1, 553 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0); 554 } 555 556 static void sd_normal_rw(struct rtsx_usb_sdmmc *host, 557 struct mmc_request *mrq) 558 { 559 struct mmc_command *cmd = mrq->cmd; 560 struct mmc_data *data = mrq->data; 561 u8 *buf; 562 563 buf = kzalloc(data->blksz, GFP_NOIO); 564 if (!buf) { 565 cmd->error = -ENOMEM; 566 return; 567 } 568 569 if (data->flags & MMC_DATA_READ) { 570 if (host->initial_mode) 571 sd_disable_initial_mode(host); 572 573 cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf, 574 data->blksz, 200); 575 576 if (host->initial_mode) 577 sd_enable_initial_mode(host); 578 579 sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz); 580 } else { 581 sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz); 582 583 cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf, 584 data->blksz, 200); 585 } 586 587 kfree(buf); 588 } 589 590 static int sd_change_phase(struct rtsx_usb_sdmmc *host, u8 sample_point, int tx) 591 { 592 struct rtsx_ucr *ucr = host->ucr; 593 int err; 594 595 dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n", 596 __func__, tx ? "TX" : "RX", sample_point); 597 598 rtsx_usb_init_cmd(ucr); 599 600 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE); 601 602 if (tx) 603 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, 604 0x0F, sample_point); 605 else 606 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL, 607 0x0F, sample_point); 608 609 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0); 610 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, 611 PHASE_NOT_RESET, PHASE_NOT_RESET); 612 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0); 613 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0); 614 615 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 616 if (err) 617 return err; 618 619 return 0; 620 } 621 622 static inline u32 get_phase_point(u32 phase_map, unsigned int idx) 623 { 624 idx &= MAX_PHASE; 625 return phase_map & (1 << idx); 626 } 627 628 static int get_phase_len(u32 phase_map, unsigned int idx) 629 { 630 int i; 631 632 for (i = 0; i < MAX_PHASE + 1; i++) { 633 if (get_phase_point(phase_map, idx + i) == 0) 634 return i; 635 } 636 return MAX_PHASE + 1; 637 } 638 639 static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map) 640 { 641 int start = 0, len = 0; 642 int start_final = 0, len_final = 0; 643 u8 final_phase = 0xFF; 644 645 if (phase_map == 0) { 646 dev_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map); 647 return final_phase; 648 } 649 650 while (start < MAX_PHASE + 1) { 651 len = get_phase_len(phase_map, start); 652 if (len_final < len) { 653 start_final = start; 654 len_final = len; 655 } 656 start += len ? len : 1; 657 } 658 659 final_phase = (start_final + len_final / 2) & MAX_PHASE; 660 dev_dbg(sdmmc_dev(host), "Phase: [map:%x] [maxlen:%d] [final:%d]\n", 661 phase_map, len_final, final_phase); 662 663 return final_phase; 664 } 665 666 static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host) 667 { 668 int err, i; 669 u8 val = 0; 670 671 for (i = 0; i < 100; i++) { 672 err = rtsx_usb_ep0_read_register(host->ucr, 673 SD_DATA_STATE, &val); 674 if (val & SD_DATA_IDLE) 675 return; 676 677 usleep_range(100, 1000); 678 } 679 } 680 681 static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host, 682 u8 opcode, u8 sample_point) 683 { 684 int err; 685 struct mmc_command cmd = {0}; 686 687 err = sd_change_phase(host, sample_point, 0); 688 if (err) 689 return err; 690 691 cmd.opcode = MMC_SEND_TUNING_BLOCK; 692 err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100); 693 if (err) { 694 /* Wait till SD DATA IDLE */ 695 sd_wait_data_idle(host); 696 sd_clear_error(host); 697 return err; 698 } 699 700 return 0; 701 } 702 703 static void sd_tuning_phase(struct rtsx_usb_sdmmc *host, 704 u8 opcode, u16 *phase_map) 705 { 706 int err, i; 707 u16 raw_phase_map = 0; 708 709 for (i = MAX_PHASE; i >= 0; i--) { 710 err = sd_tuning_rx_cmd(host, opcode, (u8)i); 711 if (!err) 712 raw_phase_map |= 1 << i; 713 } 714 715 if (phase_map) 716 *phase_map = raw_phase_map; 717 } 718 719 static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode) 720 { 721 int err, i; 722 u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map; 723 u8 final_phase; 724 725 /* setting fixed default TX phase */ 726 err = sd_change_phase(host, 0x01, 1); 727 if (err) { 728 dev_dbg(sdmmc_dev(host), "TX phase setting failed\n"); 729 return err; 730 } 731 732 /* tuning RX phase */ 733 for (i = 0; i < RX_TUNING_CNT; i++) { 734 sd_tuning_phase(host, opcode, &(raw_phase_map[i])); 735 736 if (raw_phase_map[i] == 0) 737 break; 738 } 739 740 phase_map = 0xFFFF; 741 for (i = 0; i < RX_TUNING_CNT; i++) { 742 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n", 743 i, raw_phase_map[i]); 744 phase_map &= raw_phase_map[i]; 745 } 746 dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\n", phase_map); 747 748 if (phase_map) { 749 final_phase = sd_search_final_phase(host, phase_map); 750 if (final_phase == 0xFF) 751 return -EINVAL; 752 753 err = sd_change_phase(host, final_phase, 0); 754 if (err) 755 return err; 756 } else { 757 return -EINVAL; 758 } 759 760 return 0; 761 } 762 763 static int sdmmc_get_ro(struct mmc_host *mmc) 764 { 765 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 766 struct rtsx_ucr *ucr = host->ucr; 767 int err; 768 u16 val; 769 770 if (host->host_removal) 771 return -ENOMEDIUM; 772 773 mutex_lock(&ucr->dev_mutex); 774 775 /* Check SD card detect */ 776 err = rtsx_usb_get_card_status(ucr, &val); 777 778 mutex_unlock(&ucr->dev_mutex); 779 780 781 /* Treat failed detection as non-ro */ 782 if (err) 783 return 0; 784 785 if (val & SD_WP) 786 return 1; 787 788 return 0; 789 } 790 791 static int sdmmc_get_cd(struct mmc_host *mmc) 792 { 793 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 794 struct rtsx_ucr *ucr = host->ucr; 795 int err; 796 u16 val; 797 798 if (host->host_removal) 799 return -ENOMEDIUM; 800 801 mutex_lock(&ucr->dev_mutex); 802 803 /* Check SD card detect */ 804 err = rtsx_usb_get_card_status(ucr, &val); 805 806 mutex_unlock(&ucr->dev_mutex); 807 808 /* Treat failed detection as non-exist */ 809 if (err) 810 goto no_card; 811 812 if (val & SD_CD) { 813 host->card_exist = true; 814 return 1; 815 } 816 817 no_card: 818 host->card_exist = false; 819 return 0; 820 } 821 822 static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq) 823 { 824 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 825 struct rtsx_ucr *ucr = host->ucr; 826 struct mmc_command *cmd = mrq->cmd; 827 struct mmc_data *data = mrq->data; 828 unsigned int data_size = 0; 829 830 dev_dbg(sdmmc_dev(host), "%s\n", __func__); 831 832 if (host->host_removal) { 833 cmd->error = -ENOMEDIUM; 834 goto finish; 835 } 836 837 if ((!host->card_exist)) { 838 cmd->error = -ENOMEDIUM; 839 goto finish_detect_card; 840 } 841 842 /* 843 * Reject SDIO CMDs to speed up card identification 844 * since unsupported 845 */ 846 if (cmd->opcode == SD_IO_SEND_OP_COND || 847 cmd->opcode == SD_IO_RW_DIRECT || 848 cmd->opcode == SD_IO_RW_EXTENDED) { 849 cmd->error = -EINVAL; 850 goto finish; 851 } 852 853 mutex_lock(&ucr->dev_mutex); 854 855 mutex_lock(&host->host_mutex); 856 host->mrq = mrq; 857 mutex_unlock(&host->host_mutex); 858 859 if (mrq->data) 860 data_size = data->blocks * data->blksz; 861 862 if (!data_size) { 863 sd_send_cmd_get_rsp(host, cmd); 864 } else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) || 865 mmc_op_multi(cmd->opcode)) { 866 sd_send_cmd_get_rsp(host, cmd); 867 868 if (!cmd->error) { 869 sd_rw_multi(host, mrq); 870 871 if (mmc_op_multi(cmd->opcode) && mrq->stop) { 872 sd_send_cmd_get_rsp(host, mrq->stop); 873 rtsx_usb_write_register(ucr, MC_FIFO_CTL, 874 FIFO_FLUSH, FIFO_FLUSH); 875 } 876 } 877 } else { 878 sd_normal_rw(host, mrq); 879 } 880 881 if (mrq->data) { 882 if (cmd->error || data->error) 883 data->bytes_xfered = 0; 884 else 885 data->bytes_xfered = data->blocks * data->blksz; 886 } 887 888 mutex_unlock(&ucr->dev_mutex); 889 890 finish_detect_card: 891 if (cmd->error) { 892 /* 893 * detect card when fail to update card existence state and 894 * speed up card removal when retry 895 */ 896 sdmmc_get_cd(mmc); 897 dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error); 898 } 899 900 finish: 901 mutex_lock(&host->host_mutex); 902 host->mrq = NULL; 903 mutex_unlock(&host->host_mutex); 904 905 mmc_request_done(mmc, mrq); 906 } 907 908 static int sd_set_bus_width(struct rtsx_usb_sdmmc *host, 909 unsigned char bus_width) 910 { 911 int err = 0; 912 u8 width[] = { 913 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT, 914 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT, 915 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT, 916 }; 917 918 if (bus_width <= MMC_BUS_WIDTH_8) 919 err = rtsx_usb_write_register(host->ucr, SD_CFG1, 920 0x03, width[bus_width]); 921 922 return err; 923 } 924 925 static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr) 926 { 927 rtsx_usb_init_cmd(ucr); 928 929 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55); 930 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55); 931 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95); 932 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); 933 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55); 934 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5); 935 936 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 937 } 938 939 static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr) 940 { 941 rtsx_usb_init_cmd(ucr); 942 943 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65); 944 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55); 945 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95); 946 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); 947 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56); 948 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59); 949 950 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 951 } 952 953 static int sd_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr) 954 { 955 rtsx_usb_init_cmd(ucr); 956 957 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA); 958 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA); 959 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9); 960 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); 961 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55); 962 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5); 963 964 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 965 } 966 967 static int sd_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr) 968 { 969 rtsx_usb_init_cmd(ucr); 970 971 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5); 972 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A); 973 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5); 974 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A); 975 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65); 976 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A); 977 978 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 979 } 980 981 static int sd_power_on(struct rtsx_usb_sdmmc *host) 982 { 983 struct rtsx_ucr *ucr = host->ucr; 984 int err; 985 986 dev_dbg(sdmmc_dev(host), "%s\n", __func__); 987 rtsx_usb_init_cmd(ucr); 988 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL); 989 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE, 990 CARD_SHARE_MASK, CARD_SHARE_SD); 991 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, 992 SD_CLK_EN, SD_CLK_EN); 993 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 994 if (err) 995 return err; 996 997 if (CHECK_PKG(ucr, LQFP48)) 998 err = sd_pull_ctl_enable_lqfp48(ucr); 999 else 1000 err = sd_pull_ctl_enable_qfn24(ucr); 1001 if (err) 1002 return err; 1003 1004 err = rtsx_usb_write_register(ucr, CARD_PWR_CTL, 1005 POWER_MASK, PARTIAL_POWER_ON); 1006 if (err) 1007 return err; 1008 1009 usleep_range(800, 1000); 1010 1011 rtsx_usb_init_cmd(ucr); 1012 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, 1013 POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON); 1014 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, 1015 SD_OUTPUT_EN, SD_OUTPUT_EN); 1016 1017 return rtsx_usb_send_cmd(ucr, MODE_C, 100); 1018 } 1019 1020 static int sd_power_off(struct rtsx_usb_sdmmc *host) 1021 { 1022 struct rtsx_ucr *ucr = host->ucr; 1023 int err; 1024 1025 dev_dbg(sdmmc_dev(host), "%s\n", __func__); 1026 rtsx_usb_init_cmd(ucr); 1027 1028 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0); 1029 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0); 1030 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, 1031 POWER_MASK, POWER_OFF); 1032 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, 1033 POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND); 1034 1035 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 1036 if (err) 1037 return err; 1038 1039 if (CHECK_PKG(ucr, LQFP48)) 1040 return sd_pull_ctl_disable_lqfp48(ucr); 1041 return sd_pull_ctl_disable_qfn24(ucr); 1042 } 1043 1044 static int sd_set_power_mode(struct rtsx_usb_sdmmc *host, 1045 unsigned char power_mode) 1046 { 1047 int err; 1048 1049 if (power_mode != MMC_POWER_OFF) 1050 power_mode = MMC_POWER_ON; 1051 1052 if (power_mode == host->power_mode) 1053 return 0; 1054 1055 if (power_mode == MMC_POWER_OFF) { 1056 err = sd_power_off(host); 1057 pm_runtime_put(sdmmc_dev(host)); 1058 } else { 1059 pm_runtime_get_sync(sdmmc_dev(host)); 1060 err = sd_power_on(host); 1061 } 1062 1063 if (!err) 1064 host->power_mode = power_mode; 1065 1066 return err; 1067 } 1068 1069 static int sd_set_timing(struct rtsx_usb_sdmmc *host, 1070 unsigned char timing, bool *ddr_mode) 1071 { 1072 struct rtsx_ucr *ucr = host->ucr; 1073 int err; 1074 1075 *ddr_mode = false; 1076 1077 rtsx_usb_init_cmd(ucr); 1078 1079 switch (timing) { 1080 case MMC_TIMING_UHS_SDR104: 1081 case MMC_TIMING_UHS_SDR50: 1082 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, 1083 0x0C | SD_ASYNC_FIFO_RST, 1084 SD_30_MODE | SD_ASYNC_FIFO_RST); 1085 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, 1086 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1); 1087 break; 1088 1089 case MMC_TIMING_UHS_DDR50: 1090 *ddr_mode = true; 1091 1092 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, 1093 0x0C | SD_ASYNC_FIFO_RST, 1094 SD_DDR_MODE | SD_ASYNC_FIFO_RST); 1095 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, 1096 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1); 1097 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL, 1098 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT); 1099 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL, 1100 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD, 1101 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD); 1102 break; 1103 1104 case MMC_TIMING_MMC_HS: 1105 case MMC_TIMING_SD_HS: 1106 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, 1107 0x0C, SD_20_MODE); 1108 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, 1109 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1); 1110 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL, 1111 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD); 1112 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL, 1113 SD20_RX_SEL_MASK, SD20_RX_14_DELAY); 1114 break; 1115 1116 default: 1117 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 1118 SD_CFG1, 0x0C, SD_20_MODE); 1119 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, 1120 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1); 1121 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, 1122 SD_PUSH_POINT_CTL, 0xFF, 0); 1123 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL, 1124 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE); 1125 break; 1126 } 1127 1128 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 1129 1130 return err; 1131 } 1132 1133 static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 1134 { 1135 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 1136 struct rtsx_ucr *ucr = host->ucr; 1137 1138 dev_dbg(sdmmc_dev(host), "%s\n", __func__); 1139 mutex_lock(&ucr->dev_mutex); 1140 1141 if (rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD)) { 1142 mutex_unlock(&ucr->dev_mutex); 1143 return; 1144 } 1145 1146 sd_set_power_mode(host, ios->power_mode); 1147 sd_set_bus_width(host, ios->bus_width); 1148 sd_set_timing(host, ios->timing, &host->ddr_mode); 1149 1150 host->vpclk = false; 1151 host->double_clk = true; 1152 1153 switch (ios->timing) { 1154 case MMC_TIMING_UHS_SDR104: 1155 case MMC_TIMING_UHS_SDR50: 1156 host->ssc_depth = SSC_DEPTH_2M; 1157 host->vpclk = true; 1158 host->double_clk = false; 1159 break; 1160 case MMC_TIMING_UHS_DDR50: 1161 case MMC_TIMING_UHS_SDR25: 1162 host->ssc_depth = SSC_DEPTH_1M; 1163 break; 1164 default: 1165 host->ssc_depth = SSC_DEPTH_512K; 1166 break; 1167 } 1168 1169 host->initial_mode = (ios->clock <= 1000000) ? true : false; 1170 host->clock = ios->clock; 1171 1172 rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth, 1173 host->initial_mode, host->double_clk, host->vpclk); 1174 1175 mutex_unlock(&ucr->dev_mutex); 1176 dev_dbg(sdmmc_dev(host), "%s end\n", __func__); 1177 } 1178 1179 static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) 1180 { 1181 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 1182 struct rtsx_ucr *ucr = host->ucr; 1183 int err = 0; 1184 1185 dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n", 1186 __func__, ios->signal_voltage); 1187 1188 if (host->host_removal) 1189 return -ENOMEDIUM; 1190 1191 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120) 1192 return -EPERM; 1193 1194 mutex_lock(&ucr->dev_mutex); 1195 1196 err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD); 1197 if (err) { 1198 mutex_unlock(&ucr->dev_mutex); 1199 return err; 1200 } 1201 1202 /* Let mmc core do the busy checking, simply stop the forced-toggle 1203 * clock(while issuing CMD11) and switch voltage. 1204 */ 1205 rtsx_usb_init_cmd(ucr); 1206 1207 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 1208 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL, 1209 SD_IO_USING_1V8, SD_IO_USING_3V3); 1210 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG, 1211 TUNE_SD18_MASK, TUNE_SD18_3V3); 1212 } else { 1213 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT, 1214 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 1215 SD_CLK_FORCE_STOP); 1216 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL, 1217 SD_IO_USING_1V8, SD_IO_USING_1V8); 1218 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG, 1219 TUNE_SD18_MASK, TUNE_SD18_1V8); 1220 } 1221 1222 err = rtsx_usb_send_cmd(ucr, MODE_C, 100); 1223 mutex_unlock(&ucr->dev_mutex); 1224 1225 return err; 1226 } 1227 1228 static int sdmmc_card_busy(struct mmc_host *mmc) 1229 { 1230 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 1231 struct rtsx_ucr *ucr = host->ucr; 1232 int err; 1233 u8 stat; 1234 u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS 1235 | SD_DAT0_STATUS; 1236 1237 dev_dbg(sdmmc_dev(host), "%s\n", __func__); 1238 1239 mutex_lock(&ucr->dev_mutex); 1240 1241 err = rtsx_usb_write_register(ucr, SD_BUS_STAT, 1242 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 1243 SD_CLK_TOGGLE_EN); 1244 if (err) 1245 goto out; 1246 1247 mdelay(1); 1248 1249 err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat); 1250 if (err) 1251 goto out; 1252 1253 err = rtsx_usb_write_register(ucr, SD_BUS_STAT, 1254 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0); 1255 out: 1256 mutex_unlock(&ucr->dev_mutex); 1257 1258 if (err) 1259 return err; 1260 1261 /* check if any pin between dat[0:3] is low */ 1262 if ((stat & mask) != mask) 1263 return 1; 1264 else 1265 return 0; 1266 } 1267 1268 static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode) 1269 { 1270 struct rtsx_usb_sdmmc *host = mmc_priv(mmc); 1271 struct rtsx_ucr *ucr = host->ucr; 1272 int err = 0; 1273 1274 if (host->host_removal) 1275 return -ENOMEDIUM; 1276 1277 mutex_lock(&ucr->dev_mutex); 1278 1279 if (!host->ddr_mode) 1280 err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK); 1281 1282 mutex_unlock(&ucr->dev_mutex); 1283 1284 return err; 1285 } 1286 1287 static const struct mmc_host_ops rtsx_usb_sdmmc_ops = { 1288 .request = sdmmc_request, 1289 .set_ios = sdmmc_set_ios, 1290 .get_ro = sdmmc_get_ro, 1291 .get_cd = sdmmc_get_cd, 1292 .start_signal_voltage_switch = sdmmc_switch_voltage, 1293 .card_busy = sdmmc_card_busy, 1294 .execute_tuning = sdmmc_execute_tuning, 1295 }; 1296 1297 #ifdef RTSX_USB_USE_LEDS_CLASS 1298 static void rtsx_usb_led_control(struct led_classdev *led, 1299 enum led_brightness brightness) 1300 { 1301 struct rtsx_usb_sdmmc *host = container_of(led, 1302 struct rtsx_usb_sdmmc, led); 1303 1304 if (host->host_removal) 1305 return; 1306 1307 host->led.brightness = brightness; 1308 schedule_work(&host->led_work); 1309 } 1310 1311 static void rtsx_usb_update_led(struct work_struct *work) 1312 { 1313 struct rtsx_usb_sdmmc *host = 1314 container_of(work, struct rtsx_usb_sdmmc, led_work); 1315 struct rtsx_ucr *ucr = host->ucr; 1316 1317 mutex_lock(&ucr->dev_mutex); 1318 1319 if (host->led.brightness == LED_OFF) 1320 rtsx_usb_turn_off_led(ucr); 1321 else 1322 rtsx_usb_turn_on_led(ucr); 1323 1324 mutex_unlock(&ucr->dev_mutex); 1325 } 1326 #endif 1327 1328 static void rtsx_usb_init_host(struct rtsx_usb_sdmmc *host) 1329 { 1330 struct mmc_host *mmc = host->mmc; 1331 1332 mmc->f_min = 250000; 1333 mmc->f_max = 208000000; 1334 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; 1335 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED | 1336 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST | 1337 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 | 1338 MMC_CAP_NEEDS_POLL; 1339 mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE; 1340 1341 mmc->max_current_330 = 400; 1342 mmc->max_current_180 = 800; 1343 mmc->ops = &rtsx_usb_sdmmc_ops; 1344 mmc->max_segs = 256; 1345 mmc->max_seg_size = 65536; 1346 mmc->max_blk_size = 512; 1347 mmc->max_blk_count = 65535; 1348 mmc->max_req_size = 524288; 1349 1350 host->power_mode = MMC_POWER_OFF; 1351 } 1352 1353 static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev) 1354 { 1355 struct mmc_host *mmc; 1356 struct rtsx_usb_sdmmc *host; 1357 struct rtsx_ucr *ucr; 1358 #ifdef RTSX_USB_USE_LEDS_CLASS 1359 int err; 1360 #endif 1361 1362 ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent)); 1363 if (!ucr) 1364 return -ENXIO; 1365 1366 dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n"); 1367 1368 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev); 1369 if (!mmc) 1370 return -ENOMEM; 1371 1372 host = mmc_priv(mmc); 1373 host->ucr = ucr; 1374 host->mmc = mmc; 1375 host->pdev = pdev; 1376 platform_set_drvdata(pdev, host); 1377 1378 mutex_init(&host->host_mutex); 1379 rtsx_usb_init_host(host); 1380 pm_runtime_enable(&pdev->dev); 1381 1382 #ifdef RTSX_USB_USE_LEDS_CLASS 1383 snprintf(host->led_name, sizeof(host->led_name), 1384 "%s::", mmc_hostname(mmc)); 1385 host->led.name = host->led_name; 1386 host->led.brightness = LED_OFF; 1387 host->led.default_trigger = mmc_hostname(mmc); 1388 host->led.brightness_set = rtsx_usb_led_control; 1389 1390 err = led_classdev_register(mmc_dev(mmc), &host->led); 1391 if (err) 1392 dev_err(&(pdev->dev), 1393 "Failed to register LED device: %d\n", err); 1394 INIT_WORK(&host->led_work, rtsx_usb_update_led); 1395 1396 #endif 1397 mmc_add_host(mmc); 1398 1399 return 0; 1400 } 1401 1402 static int rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev) 1403 { 1404 struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev); 1405 struct mmc_host *mmc; 1406 1407 if (!host) 1408 return 0; 1409 1410 mmc = host->mmc; 1411 host->host_removal = true; 1412 1413 mutex_lock(&host->host_mutex); 1414 if (host->mrq) { 1415 dev_dbg(&(pdev->dev), 1416 "%s: Controller removed during transfer\n", 1417 mmc_hostname(mmc)); 1418 host->mrq->cmd->error = -ENOMEDIUM; 1419 if (host->mrq->stop) 1420 host->mrq->stop->error = -ENOMEDIUM; 1421 mmc_request_done(mmc, host->mrq); 1422 } 1423 mutex_unlock(&host->host_mutex); 1424 1425 mmc_remove_host(mmc); 1426 1427 #ifdef RTSX_USB_USE_LEDS_CLASS 1428 cancel_work_sync(&host->led_work); 1429 led_classdev_unregister(&host->led); 1430 #endif 1431 1432 mmc_free_host(mmc); 1433 pm_runtime_disable(&pdev->dev); 1434 platform_set_drvdata(pdev, NULL); 1435 1436 dev_dbg(&(pdev->dev), 1437 ": Realtek USB SD/MMC module has been removed\n"); 1438 1439 return 0; 1440 } 1441 1442 static struct platform_device_id rtsx_usb_sdmmc_ids[] = { 1443 { 1444 .name = "rtsx_usb_sdmmc", 1445 }, { 1446 /* sentinel */ 1447 } 1448 }; 1449 MODULE_DEVICE_TABLE(platform, rtsx_usb_sdmmc_ids); 1450 1451 static struct platform_driver rtsx_usb_sdmmc_driver = { 1452 .probe = rtsx_usb_sdmmc_drv_probe, 1453 .remove = rtsx_usb_sdmmc_drv_remove, 1454 .id_table = rtsx_usb_sdmmc_ids, 1455 .driver = { 1456 .name = "rtsx_usb_sdmmc", 1457 }, 1458 }; 1459 module_platform_driver(rtsx_usb_sdmmc_driver); 1460 1461 MODULE_LICENSE("GPL v2"); 1462 MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>"); 1463 MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver"); 1464