drivers/mmc/host/rtsx_usb_sdmmc.c

   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
 583         dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n",
 584                         __func__, tx ? "TX" : "RX", sample_point);
 585
 586         rtsx_usb_init_cmd(ucr);
 587
 588         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE);
 589
 590         if (tx)
 591                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 592                                 0x0F, sample_point);
 593         else
 594                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL,
 595                                 0x0F, sample_point);
 596
 597         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
 598         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 599                         PHASE_NOT_RESET, PHASE_NOT_RESET);
 600         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0);
 601         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0);
 602
 603         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 604 }
 605
 606 static inline u32 get_phase_point(u32 phase_map, unsigned int idx)
 607 {
 608         idx &= MAX_PHASE;
 609         return phase_map & (1 << idx);
 610 }
 611
 612 static int get_phase_len(u32 phase_map, unsigned int idx)
 613 {
 614         int i;
 615
 616         for (i = 0; i < MAX_PHASE + 1; i++) {
 617                 if (get_phase_point(phase_map, idx + i) == 0)
 618                         return i;
 619         }
 620         return MAX_PHASE + 1;
 621 }
 622
 623 static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map)
 624 {
 625         int start = 0, len = 0;
 626         int start_final = 0, len_final = 0;
 627         u8 final_phase = 0xFF;
 628
 629         if (phase_map == 0) {
 630                 dev_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map);
 631                 return final_phase;
 632         }
 633
 634         while (start < MAX_PHASE + 1) {
 635                 len = get_phase_len(phase_map, start);
 636                 if (len_final < len) {
 637                         start_final = start;
 638                         len_final = len;
 639                 }
 640                 start += len ? len : 1;
 641         }
 642
 643         final_phase = (start_final + len_final / 2) & MAX_PHASE;
 644         dev_dbg(sdmmc_dev(host), "Phase: [map:%x] [maxlen:%d] [final:%d]\n",
 645                 phase_map, len_final, final_phase);
 646
 647         return final_phase;
 648 }
 649
 650 static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host)
 651 {
 652         int i;
 653         u8 val = 0;
 654
 655         for (i = 0; i < 100; i++) {
 656                 rtsx_usb_ep0_read_register(host->ucr, SD_DATA_STATE, &val);
 657                 if (val & SD_DATA_IDLE)
 658                         return;
 659
 660                 usleep_range(100, 1000);
 661         }
 662 }
 663
 664 static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host,
 665                 u8 opcode, u8 sample_point)
 666 {
 667         int err;
 668         struct mmc_command cmd = {};
 669
 670         err = sd_change_phase(host, sample_point, 0);
 671         if (err)
 672                 return err;
 673
 674         cmd.opcode = MMC_SEND_TUNING_BLOCK;
 675         err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
 676         if (err) {
 677                 /* Wait till SD DATA IDLE */
 678                 sd_wait_data_idle(host);
 679                 sd_clear_error(host);
 680                 return err;
 681         }
 682
 683         return 0;
 684 }
 685
 686 static void sd_tuning_phase(struct rtsx_usb_sdmmc *host,
 687                 u8 opcode, u16 *phase_map)
 688 {
 689         int err, i;
 690         u16 raw_phase_map = 0;
 691
 692         for (i = MAX_PHASE; i >= 0; i--) {
 693                 err = sd_tuning_rx_cmd(host, opcode, (u8)i);
 694                 if (!err)
 695                         raw_phase_map |= 1 << i;
 696         }
 697
 698         if (phase_map)
 699                 *phase_map = raw_phase_map;
 700 }
 701
 702 static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode)
 703 {
 704         int err, i;
 705         u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
 706         u8 final_phase;
 707
 708         /* setting fixed default TX phase */
 709         err = sd_change_phase(host, 0x01, 1);
 710         if (err) {
 711                 dev_dbg(sdmmc_dev(host), "TX phase setting failed\n");
 712                 return err;
 713         }
 714
 715         /* tuning RX phase */
 716         for (i = 0; i < RX_TUNING_CNT; i++) {
 717                 sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
 718
 719                 if (raw_phase_map[i] == 0)
 720                         break;
 721         }
 722
 723         phase_map = 0xFFFF;
 724         for (i = 0; i < RX_TUNING_CNT; i++) {
 725                 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n",
 726                                 i, raw_phase_map[i]);
 727                 phase_map &= raw_phase_map[i];
 728         }
 729         dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\n", phase_map);
 730
 731         if (phase_map) {
 732                 final_phase = sd_search_final_phase(host, phase_map);
 733                 if (final_phase == 0xFF)
 734                         return -EINVAL;
 735
 736                 err = sd_change_phase(host, final_phase, 0);
 737                 if (err)
 738                         return err;
 739         } else {
 740                 return -EINVAL;
 741         }
 742
 743         return 0;
 744 }
 745
 746 static int sdmmc_get_ro(struct mmc_host *mmc)
 747 {
 748         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
 749         struct rtsx_ucr *ucr = host->ucr;
 750         int err;
 751         u16 val;
 752
 753         if (host->host_removal)
 754                 return -ENOMEDIUM;
 755
 756         mutex_lock(&ucr->dev_mutex);
 757
 758         /* Check SD card detect */
 759         err = rtsx_usb_get_card_status(ucr, &val);
 760
 761         mutex_unlock(&ucr->dev_mutex);
 762
 763
 764         /* Treat failed detection as non-ro */
 765         if (err)
 766                 return 0;
 767
 768         if (val & SD_WP)
 769                 return 1;
 770
 771         return 0;
 772 }
 773
 774 static int sdmmc_get_cd(struct mmc_host *mmc)
 775 {
 776         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
 777         struct rtsx_ucr *ucr = host->ucr;
 778         int err;
 779         u16 val;
 780
 781         if (host->host_removal)
 782                 return -ENOMEDIUM;
 783
 784         mutex_lock(&ucr->dev_mutex);
 785
 786         /* Check SD card detect */
 787         err = rtsx_usb_get_card_status(ucr, &val);
 788
 789         mutex_unlock(&ucr->dev_mutex);
 790
 791         /* Treat failed detection as non-exist */
 792         if (err)
 793                 goto no_card;
 794
 795         if (val & SD_CD) {
 796                 host->card_exist = true;
 797                 return 1;
 798         }
 799
 800 no_card:
 801         host->card_exist = false;
 802         return 0;
 803 }
 804
 805 static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 806 {
 807         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
 808         struct rtsx_ucr *ucr = host->ucr;
 809         struct mmc_command *cmd = mrq->cmd;
 810         struct mmc_data *data = mrq->data;
 811         unsigned int data_size = 0;
 812
 813         dev_dbg(sdmmc_dev(host), "%s\n", __func__);
 814
 815         if (host->host_removal) {
 816                 cmd->error = -ENOMEDIUM;
 817                 goto finish;
 818         }
 819
 820         if ((!host->card_exist)) {
 821                 cmd->error = -ENOMEDIUM;
 822                 goto finish_detect_card;
 823         }
 824
 825         mutex_lock(&ucr->dev_mutex);
 826
 827         mutex_lock(&host->host_mutex);
 828         host->mrq = mrq;
 829         mutex_unlock(&host->host_mutex);
 830
 831         if (mrq->data)
 832                 data_size = data->blocks * data->blksz;
 833
 834         if (!data_size) {
 835                 sd_send_cmd_get_rsp(host, cmd);
 836         } else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) ||
 837                    mmc_op_multi(cmd->opcode)) {
 838                 sd_send_cmd_get_rsp(host, cmd);
 839
 840                 if (!cmd->error) {
 841                         sd_rw_multi(host, mrq);
 842
 843                         if (mmc_op_multi(cmd->opcode) && mrq->stop) {
 844                                 sd_send_cmd_get_rsp(host, mrq->stop);
 845                                 rtsx_usb_write_register(ucr, MC_FIFO_CTL,
 846                                                 FIFO_FLUSH, FIFO_FLUSH);
 847                         }
 848                 }
 849         } else {
 850                 sd_normal_rw(host, mrq);
 851         }
 852
 853         if (mrq->data) {
 854                 if (cmd->error || data->error)
 855                         data->bytes_xfered = 0;
 856                 else
 857                         data->bytes_xfered = data->blocks * data->blksz;
 858         }
 859
 860         mutex_unlock(&ucr->dev_mutex);
 861
 862 finish_detect_card:
 863         if (cmd->error) {
 864                 /*
 865                  * detect card when fail to update card existence state and
 866                  * speed up card removal when retry
 867                  */
 868                 sdmmc_get_cd(mmc);
 869                 dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error);
 870         }
 871
 872 finish:
 873         mutex_lock(&host->host_mutex);
 874         host->mrq = NULL;
 875         mutex_unlock(&host->host_mutex);
 876
 877         mmc_request_done(mmc, mrq);
 878 }
 879
 880 static int sd_set_bus_width(struct rtsx_usb_sdmmc *host,
 881                 unsigned char bus_width)
 882 {
 883         int err = 0;
 884         static const u8 width[] = {
 885                 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
 886                 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
 887                 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
 888         };
 889
 890         if (bus_width <= MMC_BUS_WIDTH_8)
 891                 err = rtsx_usb_write_register(host->ucr, SD_CFG1,
 892                                 0x03, width[bus_width]);
 893
 894         return err;
 895 }
 896
 897 static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
 898 {
 899         rtsx_usb_init_cmd(ucr);
 900
 901         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
 902         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
 903         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
 904         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
 905         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
 906         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
 907
 908         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 909 }
 910
 911 static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
 912 {
 913         rtsx_usb_init_cmd(ucr);
 914
 915         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
 916         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
 917         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
 918         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
 919         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
 920         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
 921
 922         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 923 }
 924
 925 static int sd_pull_ctl_enable_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, 0xAA);
 930         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA);
 931         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9);
 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_enable_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, 0xA5);
 944         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A);
 945         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5);
 946         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A);
 947         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65);
 948         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A);
 949
 950         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 951 }
 952
 953 static int sd_power_on(struct rtsx_usb_sdmmc *host)
 954 {
 955         struct rtsx_ucr *ucr = host->ucr;
 956         int err;
 957
 958         dev_dbg(sdmmc_dev(host), "%s\n", __func__);
 959         rtsx_usb_init_cmd(ucr);
 960         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
 961         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
 962                         CARD_SHARE_MASK, CARD_SHARE_SD);
 963         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
 964                         SD_CLK_EN, SD_CLK_EN);
 965         err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
 966         if (err)
 967                 return err;
 968
 969         if (CHECK_PKG(ucr, LQFP48))
 970                 err = sd_pull_ctl_enable_lqfp48(ucr);
 971         else
 972                 err = sd_pull_ctl_enable_qfn24(ucr);
 973         if (err)
 974                 return err;
 975
 976         err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
 977                         POWER_MASK, PARTIAL_POWER_ON);
 978         if (err)
 979                 return err;
 980
 981         usleep_range(800, 1000);
 982
 983         rtsx_usb_init_cmd(ucr);
 984         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
 985                         POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON);
 986         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
 987                         SD_OUTPUT_EN, SD_OUTPUT_EN);
 988
 989         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 990 }
 991
 992 static int sd_power_off(struct rtsx_usb_sdmmc *host)
 993 {
 994         struct rtsx_ucr *ucr = host->ucr;
 995         int err;
 996
 997         dev_dbg(sdmmc_dev(host), "%s\n", __func__);
 998         rtsx_usb_init_cmd(ucr);
 999
1000         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
1001         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
1002         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1003                         POWER_MASK, POWER_OFF);
1004         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1005                         POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND);
1006
1007         err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1008         if (err)
1009                 return err;
1010
1011         if (CHECK_PKG(ucr, LQFP48))
1012                         return sd_pull_ctl_disable_lqfp48(ucr);
1013         return sd_pull_ctl_disable_qfn24(ucr);
1014 }
1015
1016 static int sd_set_power_mode(struct rtsx_usb_sdmmc *host,
1017                 unsigned char power_mode)
1018 {
1019         int err;
1020
1021         if (power_mode != MMC_POWER_OFF)
1022                 power_mode = MMC_POWER_ON;
1023
1024         if (power_mode == host->power_mode)
1025                 return 0;
1026
1027         if (power_mode == MMC_POWER_OFF) {
1028                 err = sd_power_off(host);
1029                 pm_runtime_put_noidle(sdmmc_dev(host));
1030         } else {
1031                 pm_runtime_get_noresume(sdmmc_dev(host));
1032                 err = sd_power_on(host);
1033         }
1034
1035         if (!err)
1036                 host->power_mode = power_mode;
1037
1038         return err;
1039 }
1040
1041 static int sd_set_timing(struct rtsx_usb_sdmmc *host,
1042                 unsigned char timing, bool *ddr_mode)
1043 {
1044         struct rtsx_ucr *ucr = host->ucr;
1045         int err;
1046
1047         *ddr_mode = false;
1048
1049         rtsx_usb_init_cmd(ucr);
1050
1051         switch (timing) {
1052         case MMC_TIMING_UHS_SDR104:
1053         case MMC_TIMING_UHS_SDR50:
1054                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1055                                 0x0C | SD_ASYNC_FIFO_RST,
1056                                 SD_30_MODE | SD_ASYNC_FIFO_RST);
1057                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1058                                 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1059                 break;
1060
1061         case MMC_TIMING_UHS_DDR50:
1062                 *ddr_mode = true;
1063
1064                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1065                                 0x0C | SD_ASYNC_FIFO_RST,
1066                                 SD_DDR_MODE | SD_ASYNC_FIFO_RST);
1067                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1068                                 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1069                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1070                                 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
1071                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1072                                 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
1073                                 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
1074                 break;
1075
1076         case MMC_TIMING_MMC_HS:
1077         case MMC_TIMING_SD_HS:
1078                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1079                                 0x0C, SD_20_MODE);
1080                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1081                                 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1082                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1083                                 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
1084                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1085                                 SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
1086                 break;
1087
1088         default:
1089                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
1090                                 SD_CFG1, 0x0C, SD_20_MODE);
1091                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1092                                 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1093                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
1094                                 SD_PUSH_POINT_CTL, 0xFF, 0);
1095                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1096                                 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
1097                 break;
1098         }
1099
1100         err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1101
1102         return err;
1103 }
1104
1105 static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1106 {
1107         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1108         struct rtsx_ucr *ucr = host->ucr;
1109
1110         dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1111         mutex_lock(&ucr->dev_mutex);
1112
1113         sd_set_power_mode(host, ios->power_mode);
1114         sd_set_bus_width(host, ios->bus_width);
1115         sd_set_timing(host, ios->timing, &host->ddr_mode);
1116
1117         host->vpclk = false;
1118         host->double_clk = true;
1119
1120         switch (ios->timing) {
1121         case MMC_TIMING_UHS_SDR104:
1122         case MMC_TIMING_UHS_SDR50:
1123                 host->ssc_depth = SSC_DEPTH_2M;
1124                 host->vpclk = true;
1125                 host->double_clk = false;
1126                 break;
1127         case MMC_TIMING_UHS_DDR50:
1128         case MMC_TIMING_UHS_SDR25:
1129                 host->ssc_depth = SSC_DEPTH_1M;
1130                 break;
1131         default:
1132                 host->ssc_depth = SSC_DEPTH_512K;
1133                 break;
1134         }
1135
1136         host->initial_mode = (ios->clock <= 1000000) ? true : false;
1137         host->clock = ios->clock;
1138
1139         rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth,
1140                         host->initial_mode, host->double_clk, host->vpclk);
1141
1142         mutex_unlock(&ucr->dev_mutex);
1143         dev_dbg(sdmmc_dev(host), "%s end\n", __func__);
1144 }
1145
1146 static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
1147 {
1148         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1149         struct rtsx_ucr *ucr = host->ucr;
1150         int err = 0;
1151
1152         dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
1153                         __func__, ios->signal_voltage);
1154
1155         if (host->host_removal)
1156                 return -ENOMEDIUM;
1157
1158         if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120)
1159                 return -EPERM;
1160
1161         mutex_lock(&ucr->dev_mutex);
1162
1163         err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD);
1164         if (err) {
1165                 mutex_unlock(&ucr->dev_mutex);
1166                 return err;
1167         }
1168
1169         /* Let mmc core do the busy checking, simply stop the forced-toggle
1170          * clock(while issuing CMD11) and switch voltage.
1171          */
1172         rtsx_usb_init_cmd(ucr);
1173
1174         if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1175                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
1176                                 SD_IO_USING_1V8, SD_IO_USING_3V3);
1177                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
1178                                 TUNE_SD18_MASK, TUNE_SD18_3V3);
1179         } else {
1180                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT,
1181                                 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
1182                                 SD_CLK_FORCE_STOP);
1183                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
1184                                 SD_IO_USING_1V8, SD_IO_USING_1V8);
1185                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
1186                                 TUNE_SD18_MASK, TUNE_SD18_1V8);
1187         }
1188
1189         err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1190         mutex_unlock(&ucr->dev_mutex);
1191
1192         return err;
1193 }
1194
1195 static int sdmmc_card_busy(struct mmc_host *mmc)
1196 {
1197         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1198         struct rtsx_ucr *ucr = host->ucr;
1199         int err;
1200         u8 stat;
1201         u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS
1202                 | SD_DAT0_STATUS;
1203
1204         dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1205
1206         mutex_lock(&ucr->dev_mutex);
1207
1208         err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
1209                         SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
1210                         SD_CLK_TOGGLE_EN);
1211         if (err)
1212                 goto out;
1213
1214         mdelay(1);
1215
1216         err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat);
1217         if (err)
1218                 goto out;
1219
1220         err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
1221                         SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1222 out:
1223         mutex_unlock(&ucr->dev_mutex);
1224
1225         if (err)
1226                 return err;
1227
1228         /* check if any pin between dat[0:3] is low */
1229         if ((stat & mask) != mask)
1230                 return 1;
1231         else
1232                 return 0;
1233 }
1234
1235 static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1236 {
1237         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1238         struct rtsx_ucr *ucr = host->ucr;
1239         int err = 0;
1240
1241         if (host->host_removal)
1242                 return -ENOMEDIUM;
1243
1244         mutex_lock(&ucr->dev_mutex);
1245
1246         if (!host->ddr_mode)
1247                 err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK);
1248
1249         mutex_unlock(&ucr->dev_mutex);
1250
1251         return err;
1252 }
1253
1254 static const struct mmc_host_ops rtsx_usb_sdmmc_ops = {
1255         .request = sdmmc_request,
1256         .set_ios = sdmmc_set_ios,
1257         .get_ro = sdmmc_get_ro,
1258         .get_cd = sdmmc_get_cd,
1259         .start_signal_voltage_switch = sdmmc_switch_voltage,
1260         .card_busy = sdmmc_card_busy,
1261         .execute_tuning = sdmmc_execute_tuning,
1262 };
1263
1264 #ifdef RTSX_USB_USE_LEDS_CLASS
1265 static void rtsx_usb_led_control(struct led_classdev *led,
1266         enum led_brightness brightness)
1267 {
1268         struct rtsx_usb_sdmmc *host = container_of(led,
1269                         struct rtsx_usb_sdmmc, led);
1270
1271         if (host->host_removal)
1272                 return;
1273
1274         host->led.brightness = brightness;
1275         schedule_work(&host->led_work);
1276 }
1277
1278 static void rtsx_usb_update_led(struct work_struct *work)
1279 {
1280         struct rtsx_usb_sdmmc *host =
1281                 container_of(work, struct rtsx_usb_sdmmc, led_work);
1282         struct rtsx_ucr *ucr = host->ucr;
1283
1284         pm_runtime_get_noresume(sdmmc_dev(host));
1285         mutex_lock(&ucr->dev_mutex);
1286
1287         if (host->power_mode == MMC_POWER_OFF)
1288                 goto out;
1289
1290         if (host->led.brightness == LED_OFF)
1291                 rtsx_usb_turn_off_led(ucr);
1292         else
1293                 rtsx_usb_turn_on_led(ucr);
1294
1295 out:
1296         mutex_unlock(&ucr->dev_mutex);
1297         pm_runtime_put_sync_suspend(sdmmc_dev(host));
1298 }
1299 #endif
1300
1301 static void rtsx_usb_init_host(struct rtsx_usb_sdmmc *host)
1302 {
1303         struct mmc_host *mmc = host->mmc;
1304
1305         mmc->f_min = 250000;
1306         mmc->f_max = 208000000;
1307         mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1308         mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1309                 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1310                 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 |
1311                 MMC_CAP_SYNC_RUNTIME_PM;
1312         mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE |
1313                 MMC_CAP2_NO_SDIO;
1314
1315         mmc->max_current_330 = 400;
1316         mmc->max_current_180 = 800;
1317         mmc->ops = &rtsx_usb_sdmmc_ops;
1318         mmc->max_segs = 256;
1319         mmc->max_seg_size = 65536;
1320         mmc->max_blk_size = 512;
1321         mmc->max_blk_count = 65535;
1322         mmc->max_req_size = 524288;
1323
1324         host->power_mode = MMC_POWER_OFF;
1325 }
1326
1327 static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev)
1328 {
1329         struct mmc_host *mmc;
1330         struct rtsx_usb_sdmmc *host;
1331         struct rtsx_ucr *ucr;
1332 #ifdef RTSX_USB_USE_LEDS_CLASS
1333         int err;
1334 #endif
1335
1336         ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
1337         if (!ucr)
1338                 return -ENXIO;
1339
1340         dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n");
1341
1342         mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
1343         if (!mmc)
1344                 return -ENOMEM;
1345
1346         host = mmc_priv(mmc);
1347         host->ucr = ucr;
1348         host->mmc = mmc;
1349         host->pdev = pdev;
1350         platform_set_drvdata(pdev, host);
1351
1352         mutex_init(&host->host_mutex);
1353         rtsx_usb_init_host(host);
1354         pm_runtime_enable(&pdev->dev);
1355
1356 #ifdef RTSX_USB_USE_LEDS_CLASS
1357         snprintf(host->led_name, sizeof(host->led_name),
1358                 "%s::", mmc_hostname(mmc));
1359         host->led.name = host->led_name;
1360         host->led.brightness = LED_OFF;
1361         host->led.default_trigger = mmc_hostname(mmc);
1362         host->led.brightness_set = rtsx_usb_led_control;
1363
1364         err = led_classdev_register(mmc_dev(mmc), &host->led);
1365         if (err)
1366                 dev_err(&(pdev->dev),
1367                                 "Failed to register LED device: %d\n", err);
1368         INIT_WORK(&host->led_work, rtsx_usb_update_led);
1369
1370 #endif
1371         mmc_add_host(mmc);
1372
1373         return 0;
1374 }
1375
1376 static int rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev)
1377 {
1378         struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev);
1379         struct mmc_host *mmc;
1380
1381         if (!host)
1382                 return 0;
1383
1384         mmc = host->mmc;
1385         host->host_removal = true;
1386
1387         mutex_lock(&host->host_mutex);
1388         if (host->mrq) {
1389                 dev_dbg(&(pdev->dev),
1390                         "%s: Controller removed during transfer\n",
1391                         mmc_hostname(mmc));
1392                 host->mrq->cmd->error = -ENOMEDIUM;
1393                 if (host->mrq->stop)
1394                         host->mrq->stop->error = -ENOMEDIUM;
1395                 mmc_request_done(mmc, host->mrq);
1396         }
1397         mutex_unlock(&host->host_mutex);
1398
1399         mmc_remove_host(mmc);
1400
1401 #ifdef RTSX_USB_USE_LEDS_CLASS
1402         cancel_work_sync(&host->led_work);
1403         led_classdev_unregister(&host->led);
1404 #endif
1405
1406         mmc_free_host(mmc);
1407         pm_runtime_disable(&pdev->dev);
1408         platform_set_drvdata(pdev, NULL);
1409
1410         dev_dbg(&(pdev->dev),
1411                 ": Realtek USB SD/MMC module has been removed\n");
1412
1413         return 0;
1414 }
1415
1416 #ifdef CONFIG_PM
1417 static int rtsx_usb_sdmmc_runtime_suspend(struct device *dev)
1418 {
1419         struct rtsx_usb_sdmmc *host = dev_get_drvdata(dev);
1420
1421         host->mmc->caps &= ~MMC_CAP_NEEDS_POLL;
1422         return 0;
1423 }
1424
1425 static int rtsx_usb_sdmmc_runtime_resume(struct device *dev)
1426 {
1427         struct rtsx_usb_sdmmc *host = dev_get_drvdata(dev);
1428
1429         host->mmc->caps |= MMC_CAP_NEEDS_POLL;
1430         if (sdmmc_get_cd(host->mmc) == 1)
1431                 mmc_detect_change(host->mmc, 0);
1432         return 0;
1433 }
1434 #endif
1435
1436 static const struct dev_pm_ops rtsx_usb_sdmmc_dev_pm_ops = {
1437         SET_RUNTIME_PM_OPS(rtsx_usb_sdmmc_runtime_suspend,
1438                            rtsx_usb_sdmmc_runtime_resume, NULL)
1439 };
1440
1441 static const struct platform_device_id rtsx_usb_sdmmc_ids[] = {
1442         {
1443                 .name = "rtsx_usb_sdmmc",
1444         }, {
1445                 /* sentinel */
1446         }
1447 };
1448 MODULE_DEVICE_TABLE(platform, rtsx_usb_sdmmc_ids);
1449
1450 static struct platform_driver rtsx_usb_sdmmc_driver = {
1451         .probe          = rtsx_usb_sdmmc_drv_probe,
1452         .remove         = rtsx_usb_sdmmc_drv_remove,
1453         .id_table       = rtsx_usb_sdmmc_ids,
1454         .driver         = {
1455                 .name   = "rtsx_usb_sdmmc",
1456                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1457                 .pm     = &rtsx_usb_sdmmc_dev_pm_ops,
1458         },
1459 };
1460 module_platform_driver(rtsx_usb_sdmmc_driver);
1461
1462 MODULE_LICENSE("GPL v2");
1463 MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
1464 MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver");