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 <[email protected]>
   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 <linux/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_R1B:
 317                 rsp_type = SD_RSP_TYPE_R1b;
 318                 break;
 319         case MMC_RSP_R2:
 320                 rsp_type = SD_RSP_TYPE_R2;
 321                 break;
 322         case MMC_RSP_R3:
 323                 rsp_type = SD_RSP_TYPE_R3;
 324                 break;
 325         default:
 326                 dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n");
 327                 err = -EINVAL;
 328                 goto out;
 329         }
 330
 331         if (rsp_type == SD_RSP_TYPE_R1b)
 332                 timeout = cmd->busy_timeout ? cmd->busy_timeout : 3000;
 333
 334         if (cmd->opcode == SD_SWITCH_VOLTAGE) {
 335                 err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
 336                                 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
 337                                 SD_CLK_TOGGLE_EN);
 338                 if (err)
 339                         goto out;
 340         }
 341
 342         rtsx_usb_init_cmd(ucr);
 343
 344         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx);
 345         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24));
 346         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16));
 347         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8));
 348         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg);
 349
 350         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
 351         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
 352                         0x01, PINGPONG_BUFFER);
 353         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
 354                         0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
 355         rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
 356                      SD_TRANSFER_END | SD_STAT_IDLE,
 357                      SD_TRANSFER_END | SD_STAT_IDLE);
 358
 359         if (rsp_type == SD_RSP_TYPE_R2) {
 360                 /* Read data from ping-pong buffer */
 361                 for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
 362                         rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
 363                 stat_idx = 16;
 364         } else if (rsp_type != SD_RSP_TYPE_R0) {
 365                 /* Read data from SD_CMDx registers */
 366                 for (i = SD_CMD0; i <= SD_CMD4; i++)
 367                         rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
 368                 stat_idx = 5;
 369         }
 370         len += stat_idx;
 371
 372         rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_STAT1, 0, 0);
 373
 374         err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
 375         if (err) {
 376                 dev_dbg(sdmmc_dev(host),
 377                         "rtsx_usb_send_cmd error (err = %d)\n", err);
 378                 goto out;
 379         }
 380
 381         err = rtsx_usb_get_rsp(ucr, len, timeout);
 382         if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
 383                 sd_print_debug_regs(host);
 384                 sd_clear_error(host);
 385
 386                 if (!err) {
 387                         dev_dbg(sdmmc_dev(host),
 388                                 "Transfer failed (SD_TRANSFER = %02x)\n",
 389                                         ucr->rsp_buf[0]);
 390                         err = -EIO;
 391                 } else {
 392                         dev_dbg(sdmmc_dev(host),
 393                                 "rtsx_usb_get_rsp failed (err = %d)\n", err);
 394                 }
 395
 396                 goto out;
 397         }
 398
 399         if (rsp_type == SD_RSP_TYPE_R0) {
 400                 err = 0;
 401                 goto out;
 402         }
 403
 404         /* Skip result of CHECK_REG_CMD */
 405         ptr = ucr->rsp_buf + 1;
 406
 407         /* Check (Start,Transmission) bit of Response */
 408         if ((ptr[0] & 0xC0) != 0) {
 409                 err = -EILSEQ;
 410                 dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
 411                 goto out;
 412         }
 413
 414         /* Check CRC7 */
 415         if (!(rsp_type & SD_NO_CHECK_CRC7)) {
 416                 if (ptr[stat_idx] & SD_CRC7_ERR) {
 417                         err = -EILSEQ;
 418                         dev_dbg(sdmmc_dev(host), "CRC7 error\n");
 419                         goto out;
 420                 }
 421         }
 422
 423         if (rsp_type == SD_RSP_TYPE_R2) {
 424                 /*
 425                  * The controller offloads the last byte {CRC-7, end bit 1'b1}
 426                  * of response type R2. Assign dummy CRC, 0, and end bit to the
 427                  * byte(ptr[16], goes into the LSB of resp[3] later).
 428                  */
 429                 ptr[16] = 1;
 430
 431                 for (i = 0; i < 4; i++) {
 432                         cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
 433                         dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
 434                                         i, cmd->resp[i]);
 435                 }
 436         } else {
 437                 cmd->resp[0] = get_unaligned_be32(ptr + 1);
 438                 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
 439                                 cmd->resp[0]);
 440         }
 441
 442 out:
 443         cmd->error = err;
 444 }
 445
 446 static int sd_rw_multi(struct rtsx_usb_sdmmc *host, struct mmc_request *mrq)
 447 {
 448         struct rtsx_ucr *ucr = host->ucr;
 449         struct mmc_data *data = mrq->data;
 450         int read = (data->flags & MMC_DATA_READ) ? 1 : 0;
 451         u8 cfg2, trans_mode;
 452         int err;
 453         u8 flag;
 454         size_t data_len = data->blksz * data->blocks;
 455         unsigned int pipe;
 456
 457         if (read) {
 458                 dev_dbg(sdmmc_dev(host), "%s: read %zu bytes\n",
 459                                 __func__, data_len);
 460                 cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
 461                         SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0;
 462                 trans_mode = SD_TM_AUTO_READ_3;
 463         } else {
 464                 dev_dbg(sdmmc_dev(host), "%s: write %zu bytes\n",
 465                                 __func__, data_len);
 466                 cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
 467                         SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
 468                 trans_mode = SD_TM_AUTO_WRITE_3;
 469         }
 470
 471         rtsx_usb_init_cmd(ucr);
 472
 473         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00);
 474         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02);
 475         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L,
 476                         0xFF, (u8)data->blocks);
 477         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H,
 478                         0xFF, (u8)(data->blocks >> 8));
 479
 480         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
 481                         0x01, RING_BUFFER);
 482
 483         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
 484                         0xFF, (u8)(data_len >> 24));
 485         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
 486                         0xFF, (u8)(data_len >> 16));
 487         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
 488                         0xFF, (u8)(data_len >> 8));
 489         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0,
 490                         0xFF, (u8)data_len);
 491         if (read) {
 492                 flag = MODE_CDIR;
 493                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
 494                                 0x03 | DMA_PACK_SIZE_MASK,
 495                                 DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
 496         } else {
 497                 flag = MODE_CDOR;
 498                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
 499                                 0x03 | DMA_PACK_SIZE_MASK,
 500                                 DMA_DIR_TO_CARD | DMA_EN | DMA_512);
 501         }
 502
 503         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
 504         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
 505                         trans_mode | SD_TRANSFER_START);
 506         rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
 507                         SD_TRANSFER_END, SD_TRANSFER_END);
 508
 509         err = rtsx_usb_send_cmd(ucr, flag, 100);
 510         if (err)
 511                 return err;
 512
 513         if (read)
 514                 pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
 515         else
 516                 pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
 517
 518         err = rtsx_usb_transfer_data(ucr, pipe, data->sg, data_len,
 519                         data->sg_len,  NULL, 10000);
 520         if (err) {
 521                 dev_dbg(sdmmc_dev(host), "rtsx_usb_transfer_data error %d\n"
 522                                 , err);
 523                 sd_clear_error(host);
 524                 return err;
 525         }
 526
 527         return rtsx_usb_get_rsp(ucr, 1, 2000);
 528 }
 529
 530 static inline void sd_enable_initial_mode(struct rtsx_usb_sdmmc *host)
 531 {
 532         rtsx_usb_write_register(host->ucr, SD_CFG1,
 533                         SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
 534 }
 535
 536 static inline void sd_disable_initial_mode(struct rtsx_usb_sdmmc *host)
 537 {
 538         rtsx_usb_write_register(host->ucr, SD_CFG1,
 539                         SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
 540 }
 541
 542 static void sd_normal_rw(struct rtsx_usb_sdmmc *host,
 543                 struct mmc_request *mrq)
 544 {
 545         struct mmc_command *cmd = mrq->cmd;
 546         struct mmc_data *data = mrq->data;
 547         u8 *buf;
 548
 549         buf = kzalloc(data->blksz, GFP_NOIO);
 550         if (!buf) {
 551                 cmd->error = -ENOMEM;
 552                 return;
 553         }
 554
 555         if (data->flags & MMC_DATA_READ) {
 556                 if (host->initial_mode)
 557                         sd_disable_initial_mode(host);
 558
 559                 cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf,
 560                                 data->blksz, 200);
 561
 562                 if (host->initial_mode)
 563                         sd_enable_initial_mode(host);
 564
 565                 sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
 566         } else {
 567                 sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
 568
 569                 cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf,
 570                                 data->blksz, 200);
 571         }
 572
 573         kfree(buf);
 574 }
 575
 576 static int sd_change_phase(struct rtsx_usb_sdmmc *host, u8 sample_point, int tx)
 577 {
 578         struct rtsx_ucr *ucr = host->ucr;
 579
 580         dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n",
 581                         __func__, tx ? "TX" : "RX", sample_point);
 582
 583         rtsx_usb_init_cmd(ucr);
 584
 585         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE);
 586
 587         if (tx)
 588                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 589                                 0x0F, sample_point);
 590         else
 591                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL,
 592                                 0x0F, sample_point);
 593
 594         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
 595         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 596                         PHASE_NOT_RESET, PHASE_NOT_RESET);
 597         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0);
 598         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0);
 599
 600         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 601 }
 602
 603 static inline u32 get_phase_point(u32 phase_map, unsigned int idx)
 604 {
 605         idx &= MAX_PHASE;
 606         return phase_map & (1 << idx);
 607 }
 608
 609 static int get_phase_len(u32 phase_map, unsigned int idx)
 610 {
 611         int i;
 612
 613         for (i = 0; i < MAX_PHASE + 1; i++) {
 614                 if (get_phase_point(phase_map, idx + i) == 0)
 615                         return i;
 616         }
 617         return MAX_PHASE + 1;
 618 }
 619
 620 static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map)
 621 {
 622         int start = 0, len = 0;
 623         int start_final = 0, len_final = 0;
 624         u8 final_phase = 0xFF;
 625
 626         if (phase_map == 0) {
 627                 dev_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map);
 628                 return final_phase;
 629         }
 630
 631         while (start < MAX_PHASE + 1) {
 632                 len = get_phase_len(phase_map, start);
 633                 if (len_final < len) {
 634                         start_final = start;
 635                         len_final = len;
 636                 }
 637                 start += len ? len : 1;
 638         }
 639
 640         final_phase = (start_final + len_final / 2) & MAX_PHASE;
 641         dev_dbg(sdmmc_dev(host), "Phase: [map:%x] [maxlen:%d] [final:%d]\n",
 642                 phase_map, len_final, final_phase);
 643
 644         return final_phase;
 645 }
 646
 647 static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host)
 648 {
 649         int i;
 650         u8 val = 0;
 651
 652         for (i = 0; i < 100; i++) {
 653                 rtsx_usb_ep0_read_register(host->ucr, SD_DATA_STATE, &val);
 654                 if (val & SD_DATA_IDLE)
 655                         return;
 656
 657                 usleep_range(100, 1000);
 658         }
 659 }
 660
 661 static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host,
 662                 u8 opcode, u8 sample_point)
 663 {
 664         int err;
 665         struct mmc_command cmd = {};
 666
 667         err = sd_change_phase(host, sample_point, 0);
 668         if (err)
 669                 return err;
 670
 671         cmd.opcode = MMC_SEND_TUNING_BLOCK;
 672         err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
 673         if (err) {
 674                 /* Wait till SD DATA IDLE */
 675                 sd_wait_data_idle(host);
 676                 sd_clear_error(host);
 677                 return err;
 678         }
 679
 680         return 0;
 681 }
 682
 683 static void sd_tuning_phase(struct rtsx_usb_sdmmc *host,
 684                 u8 opcode, u16 *phase_map)
 685 {
 686         int err, i;
 687         u16 raw_phase_map = 0;
 688
 689         for (i = MAX_PHASE; i >= 0; i--) {
 690                 err = sd_tuning_rx_cmd(host, opcode, (u8)i);
 691                 if (!err)
 692                         raw_phase_map |= 1 << i;
 693         }
 694
 695         if (phase_map)
 696                 *phase_map = raw_phase_map;
 697 }
 698
 699 static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode)
 700 {
 701         int err, i;
 702         u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
 703         u8 final_phase;
 704
 705         /* setting fixed default TX phase */
 706         err = sd_change_phase(host, 0x01, 1);
 707         if (err) {
 708                 dev_dbg(sdmmc_dev(host), "TX phase setting failed\n");
 709                 return err;
 710         }
 711
 712         /* tuning RX phase */
 713         for (i = 0; i < RX_TUNING_CNT; i++) {
 714                 sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
 715
 716                 if (raw_phase_map[i] == 0)
 717                         break;
 718         }
 719
 720         phase_map = 0xFFFF;
 721         for (i = 0; i < RX_TUNING_CNT; i++) {
 722                 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n",
 723                                 i, raw_phase_map[i]);
 724                 phase_map &= raw_phase_map[i];
 725         }
 726         dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\n", phase_map);
 727
 728         if (phase_map) {
 729                 final_phase = sd_search_final_phase(host, phase_map);
 730                 if (final_phase == 0xFF)
 731                         return -EINVAL;
 732
 733                 err = sd_change_phase(host, final_phase, 0);
 734                 if (err)
 735                         return err;
 736         } else {
 737                 return -EINVAL;
 738         }
 739
 740         return 0;
 741 }
 742
 743 static int sdmmc_get_ro(struct mmc_host *mmc)
 744 {
 745         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
 746         struct rtsx_ucr *ucr = host->ucr;
 747         int err;
 748         u16 val;
 749
 750         if (host->host_removal)
 751                 return -ENOMEDIUM;
 752
 753         mutex_lock(&ucr->dev_mutex);
 754
 755         /* Check SD card detect */
 756         err = rtsx_usb_get_card_status(ucr, &val);
 757
 758         mutex_unlock(&ucr->dev_mutex);
 759
 760
 761         /* Treat failed detection as non-ro */
 762         if (err)
 763                 return 0;
 764
 765         if (val & SD_WP)
 766                 return 1;
 767
 768         return 0;
 769 }
 770
 771 static int sdmmc_get_cd(struct mmc_host *mmc)
 772 {
 773         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
 774         struct rtsx_ucr *ucr = host->ucr;
 775         int err;
 776         u16 val;
 777
 778         if (host->host_removal)
 779                 return -ENOMEDIUM;
 780
 781         mutex_lock(&ucr->dev_mutex);
 782
 783         /* Check SD card detect */
 784         err = rtsx_usb_get_card_status(ucr, &val);
 785
 786         mutex_unlock(&ucr->dev_mutex);
 787
 788         /* Treat failed detection as non-exist */
 789         if (err)
 790                 goto no_card;
 791
 792         if (val & SD_CD) {
 793                 host->card_exist = true;
 794                 return 1;
 795         }
 796
 797 no_card:
 798         host->card_exist = false;
 799         return 0;
 800 }
 801
 802 static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 803 {
 804         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
 805         struct rtsx_ucr *ucr = host->ucr;
 806         struct mmc_command *cmd = mrq->cmd;
 807         struct mmc_data *data = mrq->data;
 808         unsigned int data_size = 0;
 809
 810         dev_dbg(sdmmc_dev(host), "%s\n", __func__);
 811
 812         if (host->host_removal) {
 813                 cmd->error = -ENOMEDIUM;
 814                 goto finish;
 815         }
 816
 817         if ((!host->card_exist)) {
 818                 cmd->error = -ENOMEDIUM;
 819                 goto finish_detect_card;
 820         }
 821
 822         mutex_lock(&ucr->dev_mutex);
 823
 824         mutex_lock(&host->host_mutex);
 825         host->mrq = mrq;
 826         mutex_unlock(&host->host_mutex);
 827
 828         if (mrq->data)
 829                 data_size = data->blocks * data->blksz;
 830
 831         if (!data_size) {
 832                 sd_send_cmd_get_rsp(host, cmd);
 833         } else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) ||
 834                    mmc_op_multi(cmd->opcode)) {
 835                 sd_send_cmd_get_rsp(host, cmd);
 836
 837                 if (!cmd->error) {
 838                         sd_rw_multi(host, mrq);
 839
 840                         if (mmc_op_multi(cmd->opcode) && mrq->stop) {
 841                                 sd_send_cmd_get_rsp(host, mrq->stop);
 842                                 rtsx_usb_write_register(ucr, MC_FIFO_CTL,
 843                                                 FIFO_FLUSH, FIFO_FLUSH);
 844                         }
 845                 }
 846         } else {
 847                 sd_normal_rw(host, mrq);
 848         }
 849
 850         if (mrq->data) {
 851                 if (cmd->error || data->error)
 852                         data->bytes_xfered = 0;
 853                 else
 854                         data->bytes_xfered = data->blocks * data->blksz;
 855         }
 856
 857         mutex_unlock(&ucr->dev_mutex);
 858
 859 finish_detect_card:
 860         if (cmd->error) {
 861                 /*
 862                  * detect card when fail to update card existence state and
 863                  * speed up card removal when retry
 864                  */
 865                 sdmmc_get_cd(mmc);
 866                 dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error);
 867         }
 868
 869 finish:
 870         mutex_lock(&host->host_mutex);
 871         host->mrq = NULL;
 872         mutex_unlock(&host->host_mutex);
 873
 874         mmc_request_done(mmc, mrq);
 875 }
 876
 877 static int sd_set_bus_width(struct rtsx_usb_sdmmc *host,
 878                 unsigned char bus_width)
 879 {
 880         int err = 0;
 881         static const u8 width[] = {
 882                 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
 883                 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
 884                 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
 885         };
 886
 887         if (bus_width <= MMC_BUS_WIDTH_8)
 888                 err = rtsx_usb_write_register(host->ucr, SD_CFG1,
 889                                 0x03, width[bus_width]);
 890
 891         return err;
 892 }
 893
 894 static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
 895 {
 896         rtsx_usb_init_cmd(ucr);
 897
 898         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
 899         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
 900         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
 901         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
 902         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
 903         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
 904
 905         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 906 }
 907
 908 static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
 909 {
 910         rtsx_usb_init_cmd(ucr);
 911
 912         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
 913         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
 914         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
 915         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
 916         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
 917         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
 918
 919         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 920 }
 921
 922 static int sd_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
 923 {
 924         rtsx_usb_init_cmd(ucr);
 925
 926         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA);
 927         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA);
 928         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9);
 929         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
 930         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
 931         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
 932
 933         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 934 }
 935
 936 static int sd_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
 937 {
 938         rtsx_usb_init_cmd(ucr);
 939
 940         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5);
 941         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A);
 942         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5);
 943         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A);
 944         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65);
 945         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A);
 946
 947         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 948 }
 949
 950 static int sd_power_on(struct rtsx_usb_sdmmc *host)
 951 {
 952         struct rtsx_ucr *ucr = host->ucr;
 953         int err;
 954
 955         dev_dbg(sdmmc_dev(host), "%s\n", __func__);
 956         rtsx_usb_init_cmd(ucr);
 957         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
 958         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
 959                         CARD_SHARE_MASK, CARD_SHARE_SD);
 960         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
 961                         SD_CLK_EN, SD_CLK_EN);
 962         err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
 963         if (err)
 964                 return err;
 965
 966         if (CHECK_PKG(ucr, LQFP48))
 967                 err = sd_pull_ctl_enable_lqfp48(ucr);
 968         else
 969                 err = sd_pull_ctl_enable_qfn24(ucr);
 970         if (err)
 971                 return err;
 972
 973         err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
 974                         POWER_MASK, PARTIAL_POWER_ON);
 975         if (err)
 976                 return err;
 977
 978         usleep_range(800, 1000);
 979
 980         rtsx_usb_init_cmd(ucr);
 981         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
 982                         POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON);
 983         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
 984                         SD_OUTPUT_EN, SD_OUTPUT_EN);
 985
 986         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
 987 }
 988
 989 static int sd_power_off(struct rtsx_usb_sdmmc *host)
 990 {
 991         struct rtsx_ucr *ucr = host->ucr;
 992         int err;
 993
 994         dev_dbg(sdmmc_dev(host), "%s\n", __func__);
 995         rtsx_usb_init_cmd(ucr);
 996
 997         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
 998         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
 999         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1000                         POWER_MASK, POWER_OFF);
1001         rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1002                         POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND);
1003
1004         err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1005         if (err)
1006                 return err;
1007
1008         if (CHECK_PKG(ucr, LQFP48))
1009                         return sd_pull_ctl_disable_lqfp48(ucr);
1010         return sd_pull_ctl_disable_qfn24(ucr);
1011 }
1012
1013 static int sd_set_power_mode(struct rtsx_usb_sdmmc *host,
1014                 unsigned char power_mode)
1015 {
1016         int err;
1017
1018         if (power_mode != MMC_POWER_OFF)
1019                 power_mode = MMC_POWER_ON;
1020
1021         if (power_mode == host->power_mode)
1022                 return 0;
1023
1024         if (power_mode == MMC_POWER_OFF) {
1025                 err = sd_power_off(host);
1026                 pm_runtime_put_noidle(sdmmc_dev(host));
1027         } else {
1028                 pm_runtime_get_noresume(sdmmc_dev(host));
1029                 err = sd_power_on(host);
1030         }
1031
1032         if (!err)
1033                 host->power_mode = power_mode;
1034
1035         return err;
1036 }
1037
1038 static int sd_set_timing(struct rtsx_usb_sdmmc *host,
1039                 unsigned char timing, bool *ddr_mode)
1040 {
1041         struct rtsx_ucr *ucr = host->ucr;
1042
1043         *ddr_mode = false;
1044
1045         rtsx_usb_init_cmd(ucr);
1046
1047         switch (timing) {
1048         case MMC_TIMING_UHS_SDR104:
1049         case MMC_TIMING_UHS_SDR50:
1050                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1051                                 0x0C | SD_ASYNC_FIFO_RST,
1052                                 SD_30_MODE | SD_ASYNC_FIFO_RST);
1053                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1054                                 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1055                 break;
1056
1057         case MMC_TIMING_UHS_DDR50:
1058                 *ddr_mode = true;
1059
1060                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1061                                 0x0C | SD_ASYNC_FIFO_RST,
1062                                 SD_DDR_MODE | SD_ASYNC_FIFO_RST);
1063                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1064                                 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1065                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1066                                 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
1067                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1068                                 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
1069                                 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
1070                 break;
1071
1072         case MMC_TIMING_MMC_HS:
1073         case MMC_TIMING_SD_HS:
1074                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1075                                 0x0C, SD_20_MODE);
1076                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1077                                 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1078                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1079                                 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
1080                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1081                                 SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
1082                 break;
1083
1084         default:
1085                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
1086                                 SD_CFG1, 0x0C, SD_20_MODE);
1087                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1088                                 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1089                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
1090                                 SD_PUSH_POINT_CTL, 0xFF, 0);
1091                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1092                                 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
1093                 break;
1094         }
1095
1096         return rtsx_usb_send_cmd(ucr, MODE_C, 100);
1097 }
1098
1099 static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1100 {
1101         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1102         struct rtsx_ucr *ucr = host->ucr;
1103
1104         dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1105         mutex_lock(&ucr->dev_mutex);
1106
1107         sd_set_power_mode(host, ios->power_mode);
1108         sd_set_bus_width(host, ios->bus_width);
1109         sd_set_timing(host, ios->timing, &host->ddr_mode);
1110
1111         host->vpclk = false;
1112         host->double_clk = true;
1113
1114         switch (ios->timing) {
1115         case MMC_TIMING_UHS_SDR104:
1116         case MMC_TIMING_UHS_SDR50:
1117                 host->ssc_depth = SSC_DEPTH_2M;
1118                 host->vpclk = true;
1119                 host->double_clk = false;
1120                 break;
1121         case MMC_TIMING_UHS_DDR50:
1122         case MMC_TIMING_UHS_SDR25:
1123                 host->ssc_depth = SSC_DEPTH_1M;
1124                 break;
1125         default:
1126                 host->ssc_depth = SSC_DEPTH_512K;
1127                 break;
1128         }
1129
1130         host->initial_mode = (ios->clock <= 1000000) ? true : false;
1131         host->clock = ios->clock;
1132
1133         rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth,
1134                         host->initial_mode, host->double_clk, host->vpclk);
1135
1136         mutex_unlock(&ucr->dev_mutex);
1137         dev_dbg(sdmmc_dev(host), "%s end\n", __func__);
1138 }
1139
1140 static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
1141 {
1142         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1143         struct rtsx_ucr *ucr = host->ucr;
1144         int err = 0;
1145
1146         dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
1147                         __func__, ios->signal_voltage);
1148
1149         if (host->host_removal)
1150                 return -ENOMEDIUM;
1151
1152         if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120)
1153                 return -EPERM;
1154
1155         mutex_lock(&ucr->dev_mutex);
1156
1157         err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD);
1158         if (err) {
1159                 mutex_unlock(&ucr->dev_mutex);
1160                 return err;
1161         }
1162
1163         /* Let mmc core do the busy checking, simply stop the forced-toggle
1164          * clock(while issuing CMD11) and switch voltage.
1165          */
1166         rtsx_usb_init_cmd(ucr);
1167
1168         if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1169                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
1170                                 SD_IO_USING_1V8, SD_IO_USING_3V3);
1171                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
1172                                 TUNE_SD18_MASK, TUNE_SD18_3V3);
1173         } else {
1174                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT,
1175                                 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
1176                                 SD_CLK_FORCE_STOP);
1177                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
1178                                 SD_IO_USING_1V8, SD_IO_USING_1V8);
1179                 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
1180                                 TUNE_SD18_MASK, TUNE_SD18_1V8);
1181         }
1182
1183         err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1184         mutex_unlock(&ucr->dev_mutex);
1185
1186         return err;
1187 }
1188
1189 static int sdmmc_card_busy(struct mmc_host *mmc)
1190 {
1191         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1192         struct rtsx_ucr *ucr = host->ucr;
1193         int err;
1194         u8 stat;
1195         u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS
1196                 | SD_DAT0_STATUS;
1197
1198         dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1199
1200         mutex_lock(&ucr->dev_mutex);
1201
1202         err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
1203                         SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
1204                         SD_CLK_TOGGLE_EN);
1205         if (err)
1206                 goto out;
1207
1208         mdelay(1);
1209
1210         err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat);
1211         if (err)
1212                 goto out;
1213
1214         err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
1215                         SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1216 out:
1217         mutex_unlock(&ucr->dev_mutex);
1218
1219         if (err)
1220                 return err;
1221
1222         /* check if any pin between dat[0:3] is low */
1223         if ((stat & mask) != mask)
1224                 return 1;
1225         else
1226                 return 0;
1227 }
1228
1229 static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1230 {
1231         struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1232         struct rtsx_ucr *ucr = host->ucr;
1233         int err = 0;
1234
1235         if (host->host_removal)
1236                 return -ENOMEDIUM;
1237
1238         mutex_lock(&ucr->dev_mutex);
1239
1240         if (!host->ddr_mode)
1241                 err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK);
1242
1243         mutex_unlock(&ucr->dev_mutex);
1244
1245         return err;
1246 }
1247
1248 static const struct mmc_host_ops rtsx_usb_sdmmc_ops = {
1249         .request = sdmmc_request,
1250         .set_ios = sdmmc_set_ios,
1251         .get_ro = sdmmc_get_ro,
1252         .get_cd = sdmmc_get_cd,
1253         .start_signal_voltage_switch = sdmmc_switch_voltage,
1254         .card_busy = sdmmc_card_busy,
1255         .execute_tuning = sdmmc_execute_tuning,
1256 };
1257
1258 #ifdef RTSX_USB_USE_LEDS_CLASS
1259 static void rtsx_usb_led_control(struct led_classdev *led,
1260         enum led_brightness brightness)
1261 {
1262         struct rtsx_usb_sdmmc *host = container_of(led,
1263                         struct rtsx_usb_sdmmc, led);
1264
1265         if (host->host_removal)
1266                 return;
1267
1268         host->led.brightness = brightness;
1269         schedule_work(&host->led_work);
1270 }
1271
1272 static void rtsx_usb_update_led(struct work_struct *work)
1273 {
1274         struct rtsx_usb_sdmmc *host =
1275                 container_of(work, struct rtsx_usb_sdmmc, led_work);
1276         struct rtsx_ucr *ucr = host->ucr;
1277
1278         pm_runtime_get_noresume(sdmmc_dev(host));
1279         mutex_lock(&ucr->dev_mutex);
1280
1281         if (host->power_mode == MMC_POWER_OFF)
1282                 goto out;
1283
1284         if (host->led.brightness == LED_OFF)
1285                 rtsx_usb_turn_off_led(ucr);
1286         else
1287                 rtsx_usb_turn_on_led(ucr);
1288
1289 out:
1290         mutex_unlock(&ucr->dev_mutex);
1291         pm_runtime_put_sync_suspend(sdmmc_dev(host));
1292 }
1293 #endif
1294
1295 static void rtsx_usb_init_host(struct rtsx_usb_sdmmc *host)
1296 {
1297         struct mmc_host *mmc = host->mmc;
1298
1299         mmc->f_min = 250000;
1300         mmc->f_max = 208000000;
1301         mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1302         mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1303                 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1304                 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 |
1305                 MMC_CAP_SYNC_RUNTIME_PM;
1306         mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE |
1307                 MMC_CAP2_NO_SDIO;
1308
1309         mmc->max_current_330 = 400;
1310         mmc->max_current_180 = 800;
1311         mmc->ops = &rtsx_usb_sdmmc_ops;
1312         mmc->max_segs = 256;
1313         mmc->max_seg_size = 65536;
1314         mmc->max_blk_size = 512;
1315         mmc->max_blk_count = 65535;
1316         mmc->max_req_size = 524288;
1317
1318         host->power_mode = MMC_POWER_OFF;
1319 }
1320
1321 static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev)
1322 {
1323         struct mmc_host *mmc;
1324         struct rtsx_usb_sdmmc *host;
1325         struct rtsx_ucr *ucr;
1326 #ifdef RTSX_USB_USE_LEDS_CLASS
1327         int err;
1328 #endif
1329         int ret;
1330
1331         ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
1332         if (!ucr)
1333                 return -ENXIO;
1334
1335         dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n");
1336
1337         mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
1338         if (!mmc)
1339                 return -ENOMEM;
1340
1341         host = mmc_priv(mmc);
1342         host->ucr = ucr;
1343         host->mmc = mmc;
1344         host->pdev = pdev;
1345         platform_set_drvdata(pdev, host);
1346
1347         mutex_init(&host->host_mutex);
1348         rtsx_usb_init_host(host);
1349         pm_runtime_enable(&pdev->dev);
1350
1351 #ifdef RTSX_USB_USE_LEDS_CLASS
1352         snprintf(host->led_name, sizeof(host->led_name),
1353                 "%s::", mmc_hostname(mmc));
1354         host->led.name = host->led_name;
1355         host->led.brightness = LED_OFF;
1356         host->led.default_trigger = mmc_hostname(mmc);
1357         host->led.brightness_set = rtsx_usb_led_control;
1358
1359         err = led_classdev_register(mmc_dev(mmc), &host->led);
1360         if (err)
1361                 dev_err(&(pdev->dev),
1362                                 "Failed to register LED device: %d\n", err);
1363         INIT_WORK(&host->led_work, rtsx_usb_update_led);
1364
1365 #endif
1366         ret = mmc_add_host(mmc);
1367         if (ret) {
1368 #ifdef RTSX_USB_USE_LEDS_CLASS
1369                 led_classdev_unregister(&host->led);
1370 #endif
1371                 mmc_free_host(mmc);
1372                 pm_runtime_disable(&pdev->dev);
1373                 return ret;
1374         }
1375
1376         return 0;
1377 }
1378
1379 static void rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev)
1380 {
1381         struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev);
1382         struct mmc_host *mmc;
1383
1384         if (!host)
1385                 return;
1386
1387         mmc = host->mmc;
1388         host->host_removal = true;
1389
1390         mutex_lock(&host->host_mutex);
1391         if (host->mrq) {
1392                 dev_dbg(&(pdev->dev),
1393                         "%s: Controller removed during transfer\n",
1394                         mmc_hostname(mmc));
1395                 host->mrq->cmd->error = -ENOMEDIUM;
1396                 if (host->mrq->stop)
1397                         host->mrq->stop->error = -ENOMEDIUM;
1398                 mmc_request_done(mmc, host->mrq);
1399         }
1400         mutex_unlock(&host->host_mutex);
1401
1402         mmc_remove_host(mmc);
1403
1404 #ifdef RTSX_USB_USE_LEDS_CLASS
1405         cancel_work_sync(&host->led_work);
1406         led_classdev_unregister(&host->led);
1407 #endif
1408
1409         mmc_free_host(mmc);
1410         pm_runtime_disable(&pdev->dev);
1411         platform_set_drvdata(pdev, NULL);
1412
1413         dev_dbg(&(pdev->dev),
1414                 ": Realtek USB SD/MMC module has been removed\n");
1415 }
1416
1417 #ifdef CONFIG_PM
1418 static int rtsx_usb_sdmmc_runtime_suspend(struct device *dev)
1419 {
1420         struct rtsx_usb_sdmmc *host = dev_get_drvdata(dev);
1421
1422         host->mmc->caps &= ~MMC_CAP_NEEDS_POLL;
1423         return 0;
1424 }
1425
1426 static int rtsx_usb_sdmmc_runtime_resume(struct device *dev)
1427 {
1428         struct rtsx_usb_sdmmc *host = dev_get_drvdata(dev);
1429
1430         host->mmc->caps |= MMC_CAP_NEEDS_POLL;
1431         if (sdmmc_get_cd(host->mmc) == 1)
1432                 mmc_detect_change(host->mmc, 0);
1433         return 0;
1434 }
1435 #endif
1436
1437 static const struct dev_pm_ops rtsx_usb_sdmmc_dev_pm_ops = {
1438         SET_RUNTIME_PM_OPS(rtsx_usb_sdmmc_runtime_suspend,
1439                            rtsx_usb_sdmmc_runtime_resume, NULL)
1440 };
1441
1442 static const 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                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1458                 .pm     = &rtsx_usb_sdmmc_dev_pm_ops,
1459         },
1460 };
1461 module_platform_driver(rtsx_usb_sdmmc_driver);
1462
1463 MODULE_LICENSE("GPL v2");
1464 MODULE_AUTHOR("Roger Tseng <[email protected]>");
1465 MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver");