1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Renesas SDHI 4 * 5 * Copyright (C) 2015-19 Renesas Electronics Corporation 6 * Copyright (C) 2016-19 Sang Engineering, Wolfram Sang 7 * Copyright (C) 2016-17 Horms Solutions, Simon Horman 8 * Copyright (C) 2009 Magnus Damm 9 * 10 * Based on "Compaq ASIC3 support": 11 * 12 * Copyright 2001 Compaq Computer Corporation. 13 * Copyright 2004-2005 Phil Blundell 14 * Copyright 2007-2008 OpenedHand Ltd. 15 * 16 * Authors: Phil Blundell <pb@handhelds.org>, 17 * Samuel Ortiz <sameo@openedhand.com> 18 * 19 */ 20 21 #include <linux/clk.h> 22 #include <linux/delay.h> 23 #include <linux/iopoll.h> 24 #include <linux/kernel.h> 25 #include <linux/mfd/tmio.h> 26 #include <linux/mmc/host.h> 27 #include <linux/mmc/mmc.h> 28 #include <linux/mmc/slot-gpio.h> 29 #include <linux/module.h> 30 #include <linux/pinctrl/consumer.h> 31 #include <linux/pinctrl/pinctrl-state.h> 32 #include <linux/platform_device.h> 33 #include <linux/pm_domain.h> 34 #include <linux/regulator/consumer.h> 35 #include <linux/reset.h> 36 #include <linux/sh_dma.h> 37 #include <linux/slab.h> 38 39 #include "renesas_sdhi.h" 40 #include "tmio_mmc.h" 41 42 #define CTL_HOST_MODE 0xe4 43 #define HOST_MODE_GEN2_SDR50_WMODE BIT(0) 44 #define HOST_MODE_GEN2_SDR104_WMODE BIT(0) 45 #define HOST_MODE_GEN3_WMODE BIT(0) 46 #define HOST_MODE_GEN3_BUSWIDTH BIT(8) 47 48 #define HOST_MODE_GEN3_16BIT HOST_MODE_GEN3_WMODE 49 #define HOST_MODE_GEN3_32BIT (HOST_MODE_GEN3_WMODE | HOST_MODE_GEN3_BUSWIDTH) 50 #define HOST_MODE_GEN3_64BIT 0 51 52 #define SDHI_VER_GEN2_SDR50 0x490c 53 #define SDHI_VER_RZ_A1 0x820b 54 /* very old datasheets said 0x490c for SDR104, too. They are wrong! */ 55 #define SDHI_VER_GEN2_SDR104 0xcb0d 56 #define SDHI_VER_GEN3_SD 0xcc10 57 #define SDHI_VER_GEN3_SDMMC 0xcd10 58 59 #define SDHI_GEN3_MMC0_ADDR 0xee140000 60 61 static void renesas_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width) 62 { 63 u32 val; 64 65 /* 66 * see also 67 * renesas_sdhi_of_data :: dma_buswidth 68 */ 69 switch (sd_ctrl_read16(host, CTL_VERSION)) { 70 case SDHI_VER_GEN2_SDR50: 71 val = (width == 32) ? HOST_MODE_GEN2_SDR50_WMODE : 0; 72 break; 73 case SDHI_VER_GEN2_SDR104: 74 val = (width == 32) ? 0 : HOST_MODE_GEN2_SDR104_WMODE; 75 break; 76 case SDHI_VER_GEN3_SD: 77 case SDHI_VER_GEN3_SDMMC: 78 if (width == 64) 79 val = HOST_MODE_GEN3_64BIT; 80 else if (width == 32) 81 val = HOST_MODE_GEN3_32BIT; 82 else 83 val = HOST_MODE_GEN3_16BIT; 84 break; 85 default: 86 /* nothing to do */ 87 return; 88 } 89 90 sd_ctrl_write16(host, CTL_HOST_MODE, val); 91 } 92 93 static int renesas_sdhi_clk_enable(struct tmio_mmc_host *host) 94 { 95 struct mmc_host *mmc = host->mmc; 96 struct renesas_sdhi *priv = host_to_priv(host); 97 int ret; 98 99 ret = clk_prepare_enable(priv->clk_cd); 100 if (ret < 0) 101 return ret; 102 103 /* 104 * The clock driver may not know what maximum frequency 105 * actually works, so it should be set with the max-frequency 106 * property which will already have been read to f_max. If it 107 * was missing, assume the current frequency is the maximum. 108 */ 109 if (!mmc->f_max) 110 mmc->f_max = clk_get_rate(priv->clk); 111 112 /* 113 * Minimum frequency is the minimum input clock frequency 114 * divided by our maximum divider. 115 */ 116 mmc->f_min = max(clk_round_rate(priv->clk, 1) / 512, 1L); 117 118 /* enable 16bit data access on SDBUF as default */ 119 renesas_sdhi_sdbuf_width(host, 16); 120 121 return 0; 122 } 123 124 static unsigned int renesas_sdhi_clk_update(struct tmio_mmc_host *host, 125 unsigned int wanted_clock) 126 { 127 struct renesas_sdhi *priv = host_to_priv(host); 128 struct clk *ref_clk = priv->clk; 129 unsigned int freq, diff, best_freq = 0, diff_min = ~0; 130 unsigned int new_clock, clkh_shift = 0; 131 unsigned int new_upper_limit; 132 int i; 133 134 /* 135 * We simply return the current rate if a) we are not on a R-Car Gen2+ 136 * SoC (may work for others, but untested) or b) if the SCC needs its 137 * clock during tuning, so we don't change the external clock setup. 138 */ 139 if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2) || mmc_doing_tune(host->mmc)) 140 return clk_get_rate(priv->clk); 141 142 if (priv->clkh) { 143 /* HS400 with 4TAP needs different clock settings */ 144 bool use_4tap = priv->quirks && priv->quirks->hs400_4taps; 145 bool need_slow_clkh = host->mmc->ios.timing == MMC_TIMING_MMC_HS400; 146 clkh_shift = use_4tap && need_slow_clkh ? 1 : 2; 147 ref_clk = priv->clkh; 148 } 149 150 new_clock = wanted_clock << clkh_shift; 151 152 /* 153 * We want the bus clock to be as close as possible to, but no 154 * greater than, new_clock. As we can divide by 1 << i for 155 * any i in [0, 9] we want the input clock to be as close as 156 * possible, but no greater than, new_clock << i. 157 * 158 * Add an upper limit of 1/1024 rate higher to the clock rate to fix 159 * clk rate jumping to lower rate due to rounding error (eg: RZ/G2L has 160 * 3 clk sources 533.333333 MHz, 400 MHz and 266.666666 MHz. The request 161 * for 533.333333 MHz will selects a slower 400 MHz due to rounding 162 * error (533333333 Hz / 4 * 4 = 533333332 Hz < 533333333 Hz)). 163 */ 164 for (i = min(9, ilog2(UINT_MAX / new_clock)); i >= 0; i--) { 165 freq = clk_round_rate(ref_clk, new_clock << i); 166 new_upper_limit = (new_clock << i) + ((new_clock << i) >> 10); 167 if (freq > new_upper_limit) { 168 /* Too fast; look for a slightly slower option */ 169 freq = clk_round_rate(ref_clk, (new_clock << i) / 4 * 3); 170 if (freq > new_upper_limit) 171 continue; 172 } 173 174 diff = new_clock - (freq >> i); 175 if (diff <= diff_min) { 176 best_freq = freq; 177 diff_min = diff; 178 } 179 } 180 181 clk_set_rate(ref_clk, best_freq); 182 183 if (priv->clkh) 184 clk_set_rate(priv->clk, best_freq >> clkh_shift); 185 186 return clk_get_rate(priv->clk); 187 } 188 189 static void renesas_sdhi_set_clock(struct tmio_mmc_host *host, 190 unsigned int new_clock) 191 { 192 unsigned int clk_margin; 193 u32 clk = 0, clock; 194 195 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & 196 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); 197 198 if (new_clock == 0) { 199 host->mmc->actual_clock = 0; 200 goto out; 201 } 202 203 host->mmc->actual_clock = renesas_sdhi_clk_update(host, new_clock); 204 clock = host->mmc->actual_clock / 512; 205 206 /* 207 * Add a margin of 1/1024 rate higher to the clock rate in order 208 * to avoid clk variable setting a value of 0 due to the margin 209 * provided for actual_clock in renesas_sdhi_clk_update(). 210 */ 211 clk_margin = new_clock >> 10; 212 for (clk = 0x80000080; new_clock + clk_margin >= (clock << 1); clk >>= 1) 213 clock <<= 1; 214 215 /* 1/1 clock is option */ 216 if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22) & 0x1)) { 217 if (!(host->mmc->ios.timing == MMC_TIMING_MMC_HS400)) 218 clk |= 0xff; 219 else 220 clk &= ~0xff; 221 } 222 223 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK); 224 if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) 225 usleep_range(10000, 11000); 226 227 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | 228 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); 229 230 out: 231 /* HW engineers overrode docs: no sleep needed on R-Car2+ */ 232 if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) 233 usleep_range(10000, 11000); 234 } 235 236 static void renesas_sdhi_clk_disable(struct tmio_mmc_host *host) 237 { 238 struct renesas_sdhi *priv = host_to_priv(host); 239 240 clk_disable_unprepare(priv->clk_cd); 241 } 242 243 static int renesas_sdhi_card_busy(struct mmc_host *mmc) 244 { 245 struct tmio_mmc_host *host = mmc_priv(mmc); 246 247 return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & 248 TMIO_STAT_DAT0); 249 } 250 251 static int renesas_sdhi_start_signal_voltage_switch(struct mmc_host *mmc, 252 struct mmc_ios *ios) 253 { 254 struct tmio_mmc_host *host = mmc_priv(mmc); 255 struct renesas_sdhi *priv = host_to_priv(host); 256 struct pinctrl_state *pin_state; 257 int ret; 258 259 switch (ios->signal_voltage) { 260 case MMC_SIGNAL_VOLTAGE_330: 261 pin_state = priv->pins_default; 262 break; 263 case MMC_SIGNAL_VOLTAGE_180: 264 pin_state = priv->pins_uhs; 265 break; 266 default: 267 return -EINVAL; 268 } 269 270 /* 271 * If anything is missing, assume signal voltage is fixed at 272 * 3.3V and succeed/fail accordingly. 273 */ 274 if (IS_ERR(priv->pinctrl) || IS_ERR(pin_state)) 275 return ios->signal_voltage == 276 MMC_SIGNAL_VOLTAGE_330 ? 0 : -EINVAL; 277 278 ret = mmc_regulator_set_vqmmc(host->mmc, ios); 279 if (ret < 0) 280 return ret; 281 282 return pinctrl_select_state(priv->pinctrl, pin_state); 283 } 284 285 /* SCC registers */ 286 #define SH_MOBILE_SDHI_SCC_DTCNTL 0x000 287 #define SH_MOBILE_SDHI_SCC_TAPSET 0x002 288 #define SH_MOBILE_SDHI_SCC_DT2FF 0x004 289 #define SH_MOBILE_SDHI_SCC_CKSEL 0x006 290 #define SH_MOBILE_SDHI_SCC_RVSCNTL 0x008 291 #define SH_MOBILE_SDHI_SCC_RVSREQ 0x00A 292 #define SH_MOBILE_SDHI_SCC_SMPCMP 0x00C 293 #define SH_MOBILE_SDHI_SCC_TMPPORT2 0x00E 294 #define SH_MOBILE_SDHI_SCC_TMPPORT3 0x014 295 #define SH_MOBILE_SDHI_SCC_TMPPORT4 0x016 296 #define SH_MOBILE_SDHI_SCC_TMPPORT5 0x018 297 #define SH_MOBILE_SDHI_SCC_TMPPORT6 0x01A 298 #define SH_MOBILE_SDHI_SCC_TMPPORT7 0x01C 299 300 #define SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN BIT(0) 301 #define SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT 16 302 #define SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK 0xff 303 304 #define SH_MOBILE_SDHI_SCC_CKSEL_DTSEL BIT(0) 305 306 #define SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN BIT(0) 307 308 #define SH_MOBILE_SDHI_SCC_RVSREQ_REQTAPDOWN BIT(0) 309 #define SH_MOBILE_SDHI_SCC_RVSREQ_REQTAPUP BIT(1) 310 #define SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR BIT(2) 311 312 #define SH_MOBILE_SDHI_SCC_SMPCMP_CMD_REQDOWN BIT(8) 313 #define SH_MOBILE_SDHI_SCC_SMPCMP_CMD_REQUP BIT(24) 314 #define SH_MOBILE_SDHI_SCC_SMPCMP_CMD_ERR (BIT(8) | BIT(24)) 315 316 #define SH_MOBILE_SDHI_SCC_TMPPORT2_HS400OSEL BIT(4) 317 #define SH_MOBILE_SDHI_SCC_TMPPORT2_HS400EN BIT(31) 318 319 /* Definitions for values the SH_MOBILE_SDHI_SCC_TMPPORT4 register */ 320 #define SH_MOBILE_SDHI_SCC_TMPPORT4_DLL_ACC_START BIT(0) 321 322 /* Definitions for values the SH_MOBILE_SDHI_SCC_TMPPORT5 register */ 323 #define SH_MOBILE_SDHI_SCC_TMPPORT5_DLL_RW_SEL_R BIT(8) 324 #define SH_MOBILE_SDHI_SCC_TMPPORT5_DLL_RW_SEL_W (0 << 8) 325 #define SH_MOBILE_SDHI_SCC_TMPPORT5_DLL_ADR_MASK 0x3F 326 327 /* Definitions for values the SH_MOBILE_SDHI_SCC register */ 328 #define SH_MOBILE_SDHI_SCC_TMPPORT_DISABLE_WP_CODE 0xa5000000 329 #define SH_MOBILE_SDHI_SCC_TMPPORT_CALIB_CODE_MASK 0x1f 330 #define SH_MOBILE_SDHI_SCC_TMPPORT_MANUAL_MODE BIT(7) 331 332 static inline u32 sd_scc_read32(struct tmio_mmc_host *host, 333 struct renesas_sdhi *priv, int addr) 334 { 335 return readl(priv->scc_ctl + (addr << host->bus_shift)); 336 } 337 338 static inline void sd_scc_write32(struct tmio_mmc_host *host, 339 struct renesas_sdhi *priv, 340 int addr, u32 val) 341 { 342 writel(val, priv->scc_ctl + (addr << host->bus_shift)); 343 } 344 345 static unsigned int renesas_sdhi_init_tuning(struct tmio_mmc_host *host) 346 { 347 struct renesas_sdhi *priv; 348 349 priv = host_to_priv(host); 350 351 /* Initialize SCC */ 352 sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, 0x0); 353 354 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & 355 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); 356 357 /* set sampling clock selection range */ 358 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL, 359 SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN | 360 0x8 << SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT); 361 362 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL, 363 SH_MOBILE_SDHI_SCC_CKSEL_DTSEL | 364 sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL)); 365 366 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL, 367 ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN & 368 sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL)); 369 370 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DT2FF, priv->scc_tappos); 371 372 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | 373 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); 374 375 /* Read TAPNUM */ 376 return (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL) >> 377 SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) & 378 SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK; 379 } 380 381 static void renesas_sdhi_hs400_complete(struct mmc_host *mmc) 382 { 383 struct tmio_mmc_host *host = mmc_priv(mmc); 384 struct renesas_sdhi *priv = host_to_priv(host); 385 u32 bad_taps = priv->quirks ? priv->quirks->hs400_bad_taps : 0; 386 bool use_4tap = priv->quirks && priv->quirks->hs400_4taps; 387 388 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & 389 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); 390 391 /* Set HS400 mode */ 392 sd_ctrl_write16(host, CTL_SDIF_MODE, SDIF_MODE_HS400 | 393 sd_ctrl_read16(host, CTL_SDIF_MODE)); 394 395 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DT2FF, 396 priv->scc_tappos_hs400); 397 398 if (priv->quirks && priv->quirks->manual_tap_correction) 399 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL, 400 ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN & 401 sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL)); 402 403 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT2, 404 (SH_MOBILE_SDHI_SCC_TMPPORT2_HS400EN | 405 SH_MOBILE_SDHI_SCC_TMPPORT2_HS400OSEL) | 406 sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT2)); 407 408 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL, 409 SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN | 410 sd_scc_read32(host, priv, 411 SH_MOBILE_SDHI_SCC_DTCNTL)); 412 413 /* Avoid bad TAP */ 414 if (bad_taps & BIT(priv->tap_set)) { 415 u32 new_tap = (priv->tap_set + 1) % priv->tap_num; 416 417 if (bad_taps & BIT(new_tap)) 418 new_tap = (priv->tap_set - 1) % priv->tap_num; 419 420 if (bad_taps & BIT(new_tap)) { 421 new_tap = priv->tap_set; 422 dev_dbg(&host->pdev->dev, "Can't handle three bad tap in a row\n"); 423 } 424 425 priv->tap_set = new_tap; 426 } 427 428 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, 429 priv->tap_set / (use_4tap ? 2 : 1)); 430 431 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL, 432 SH_MOBILE_SDHI_SCC_CKSEL_DTSEL | 433 sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL)); 434 435 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | 436 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); 437 438 if (priv->adjust_hs400_calib_table) 439 priv->needs_adjust_hs400 = true; 440 } 441 442 static void renesas_sdhi_disable_scc(struct mmc_host *mmc) 443 { 444 struct tmio_mmc_host *host = mmc_priv(mmc); 445 struct renesas_sdhi *priv = host_to_priv(host); 446 447 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & 448 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); 449 450 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL, 451 ~SH_MOBILE_SDHI_SCC_CKSEL_DTSEL & 452 sd_scc_read32(host, priv, 453 SH_MOBILE_SDHI_SCC_CKSEL)); 454 455 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL, 456 ~SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN & 457 sd_scc_read32(host, priv, 458 SH_MOBILE_SDHI_SCC_DTCNTL)); 459 460 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | 461 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); 462 } 463 464 static u32 sd_scc_tmpport_read32(struct tmio_mmc_host *host, 465 struct renesas_sdhi *priv, u32 addr) 466 { 467 /* read mode */ 468 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT5, 469 SH_MOBILE_SDHI_SCC_TMPPORT5_DLL_RW_SEL_R | 470 (SH_MOBILE_SDHI_SCC_TMPPORT5_DLL_ADR_MASK & addr)); 471 472 /* access start and stop */ 473 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT4, 474 SH_MOBILE_SDHI_SCC_TMPPORT4_DLL_ACC_START); 475 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT4, 0); 476 477 return sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT7); 478 } 479 480 static void sd_scc_tmpport_write32(struct tmio_mmc_host *host, 481 struct renesas_sdhi *priv, u32 addr, u32 val) 482 { 483 /* write mode */ 484 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT5, 485 SH_MOBILE_SDHI_SCC_TMPPORT5_DLL_RW_SEL_W | 486 (SH_MOBILE_SDHI_SCC_TMPPORT5_DLL_ADR_MASK & addr)); 487 488 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT6, val); 489 490 /* access start and stop */ 491 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT4, 492 SH_MOBILE_SDHI_SCC_TMPPORT4_DLL_ACC_START); 493 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT4, 0); 494 } 495 496 static void renesas_sdhi_adjust_hs400_mode_enable(struct tmio_mmc_host *host) 497 { 498 struct renesas_sdhi *priv = host_to_priv(host); 499 u32 calib_code; 500 501 /* disable write protect */ 502 sd_scc_tmpport_write32(host, priv, 0x00, 503 SH_MOBILE_SDHI_SCC_TMPPORT_DISABLE_WP_CODE); 504 /* read calibration code and adjust */ 505 calib_code = sd_scc_tmpport_read32(host, priv, 0x26); 506 calib_code &= SH_MOBILE_SDHI_SCC_TMPPORT_CALIB_CODE_MASK; 507 508 sd_scc_tmpport_write32(host, priv, 0x22, 509 SH_MOBILE_SDHI_SCC_TMPPORT_MANUAL_MODE | 510 priv->adjust_hs400_calib_table[calib_code]); 511 512 /* set offset value to TMPPORT3, hardcoded to OFFSET0 (= 0x3) for now */ 513 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT3, 0x3); 514 515 /* adjustment done, clear flag */ 516 priv->needs_adjust_hs400 = false; 517 } 518 519 static void renesas_sdhi_adjust_hs400_mode_disable(struct tmio_mmc_host *host) 520 { 521 struct renesas_sdhi *priv = host_to_priv(host); 522 523 /* disable write protect */ 524 sd_scc_tmpport_write32(host, priv, 0x00, 525 SH_MOBILE_SDHI_SCC_TMPPORT_DISABLE_WP_CODE); 526 /* disable manual calibration */ 527 sd_scc_tmpport_write32(host, priv, 0x22, 0); 528 /* clear offset value of TMPPORT3 */ 529 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT3, 0); 530 } 531 532 static void renesas_sdhi_reset_hs400_mode(struct tmio_mmc_host *host, 533 struct renesas_sdhi *priv) 534 { 535 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & 536 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); 537 538 /* Reset HS400 mode */ 539 sd_ctrl_write16(host, CTL_SDIF_MODE, ~SDIF_MODE_HS400 & 540 sd_ctrl_read16(host, CTL_SDIF_MODE)); 541 542 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DT2FF, priv->scc_tappos); 543 544 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT2, 545 ~(SH_MOBILE_SDHI_SCC_TMPPORT2_HS400EN | 546 SH_MOBILE_SDHI_SCC_TMPPORT2_HS400OSEL) & 547 sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT2)); 548 549 if (priv->adjust_hs400_calib_table) 550 renesas_sdhi_adjust_hs400_mode_disable(host); 551 552 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | 553 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); 554 } 555 556 static int renesas_sdhi_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios) 557 { 558 struct tmio_mmc_host *host = mmc_priv(mmc); 559 560 renesas_sdhi_reset_hs400_mode(host, host_to_priv(host)); 561 return 0; 562 } 563 564 static void renesas_sdhi_scc_reset(struct tmio_mmc_host *host, struct renesas_sdhi *priv) 565 { 566 renesas_sdhi_disable_scc(host->mmc); 567 renesas_sdhi_reset_hs400_mode(host, priv); 568 priv->needs_adjust_hs400 = false; 569 570 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL, 571 ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN & 572 sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL)); 573 } 574 575 /* only populated for TMIO_MMC_MIN_RCAR2 */ 576 static void renesas_sdhi_reset(struct tmio_mmc_host *host, bool preserve) 577 { 578 struct renesas_sdhi *priv = host_to_priv(host); 579 int ret; 580 u16 val; 581 582 if (!preserve) { 583 if (priv->rstc) { 584 reset_control_reset(priv->rstc); 585 /* Unknown why but without polling reset status, it will hang */ 586 read_poll_timeout(reset_control_status, ret, ret == 0, 1, 100, 587 false, priv->rstc); 588 /* At least SDHI_VER_GEN2_SDR50 needs manual release of reset */ 589 sd_ctrl_write16(host, CTL_RESET_SD, 0x0001); 590 priv->needs_adjust_hs400 = false; 591 renesas_sdhi_set_clock(host, host->clk_cache); 592 } else if (priv->scc_ctl) { 593 renesas_sdhi_scc_reset(host, priv); 594 } 595 } 596 597 if (sd_ctrl_read16(host, CTL_VERSION) >= SDHI_VER_GEN3_SD) { 598 val = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT); 599 val |= CARD_OPT_EXTOP; 600 sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, val); 601 } 602 } 603 604 static unsigned int renesas_sdhi_gen3_get_cycles(struct tmio_mmc_host *host) 605 { 606 u16 num, val = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT); 607 608 num = (val & CARD_OPT_TOP_MASK) >> CARD_OPT_TOP_SHIFT; 609 return 1 << ((val & CARD_OPT_EXTOP ? 14 : 13) + num); 610 611 } 612 613 #define SH_MOBILE_SDHI_MIN_TAP_ROW 3 614 615 static int renesas_sdhi_select_tuning(struct tmio_mmc_host *host) 616 { 617 struct renesas_sdhi *priv = host_to_priv(host); 618 unsigned int tap_start = 0, tap_end = 0, tap_cnt = 0, rs, re, i; 619 unsigned int taps_size = priv->tap_num * 2, min_tap_row; 620 unsigned long *bitmap; 621 622 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0); 623 624 /* 625 * When tuning CMD19 is issued twice for each tap, merge the 626 * result requiring the tap to be good in both runs before 627 * considering it for tuning selection. 628 */ 629 for (i = 0; i < taps_size; i++) { 630 int offset = priv->tap_num * (i < priv->tap_num ? 1 : -1); 631 632 if (!test_bit(i, priv->taps)) 633 clear_bit(i + offset, priv->taps); 634 635 if (!test_bit(i, priv->smpcmp)) 636 clear_bit(i + offset, priv->smpcmp); 637 } 638 639 /* 640 * If all TAP are OK, the sampling clock position is selected by 641 * identifying the change point of data. 642 */ 643 if (bitmap_full(priv->taps, taps_size)) { 644 bitmap = priv->smpcmp; 645 min_tap_row = 1; 646 } else { 647 bitmap = priv->taps; 648 min_tap_row = SH_MOBILE_SDHI_MIN_TAP_ROW; 649 } 650 651 /* 652 * Find the longest consecutive run of successful probes. If that 653 * is at least SH_MOBILE_SDHI_MIN_TAP_ROW probes long then use the 654 * center index as the tap, otherwise bail out. 655 */ 656 for_each_set_bitrange(rs, re, bitmap, taps_size) { 657 if (re - rs > tap_cnt) { 658 tap_end = re; 659 tap_start = rs; 660 tap_cnt = tap_end - tap_start; 661 } 662 } 663 664 if (tap_cnt >= min_tap_row) 665 priv->tap_set = (tap_start + tap_end) / 2 % priv->tap_num; 666 else 667 return -EIO; 668 669 /* Set SCC */ 670 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, priv->tap_set); 671 672 /* Enable auto re-tuning */ 673 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL, 674 SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN | 675 sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL)); 676 677 return 0; 678 } 679 680 static int renesas_sdhi_execute_tuning(struct mmc_host *mmc, u32 opcode) 681 { 682 struct tmio_mmc_host *host = mmc_priv(mmc); 683 struct renesas_sdhi *priv = host_to_priv(host); 684 int i, ret; 685 686 priv->tap_num = renesas_sdhi_init_tuning(host); 687 if (!priv->tap_num) 688 return 0; /* Tuning is not supported */ 689 690 if (priv->tap_num * 2 >= sizeof(priv->taps) * BITS_PER_BYTE) { 691 dev_err(&host->pdev->dev, 692 "Too many taps, please update 'taps' in tmio_mmc_host!\n"); 693 return -EINVAL; 694 } 695 696 bitmap_zero(priv->taps, priv->tap_num * 2); 697 bitmap_zero(priv->smpcmp, priv->tap_num * 2); 698 699 /* Issue CMD19 twice for each tap */ 700 for (i = 0; i < 2 * priv->tap_num; i++) { 701 int cmd_error = 0; 702 703 /* Set sampling clock position */ 704 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, i % priv->tap_num); 705 706 if (mmc_send_tuning(mmc, opcode, &cmd_error) == 0) 707 set_bit(i, priv->taps); 708 709 if (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_SMPCMP) == 0) 710 set_bit(i, priv->smpcmp); 711 712 if (cmd_error) 713 mmc_send_abort_tuning(mmc, opcode); 714 } 715 716 ret = renesas_sdhi_select_tuning(host); 717 if (ret < 0) 718 renesas_sdhi_scc_reset(host, priv); 719 return ret; 720 } 721 722 static bool renesas_sdhi_manual_correction(struct tmio_mmc_host *host, bool use_4tap) 723 { 724 struct renesas_sdhi *priv = host_to_priv(host); 725 unsigned int new_tap = priv->tap_set, error_tap = priv->tap_set; 726 u32 val; 727 728 val = sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ); 729 if (!val) 730 return false; 731 732 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0); 733 734 /* Change TAP position according to correction status */ 735 if (priv->quirks && priv->quirks->manual_tap_correction && 736 host->mmc->ios.timing == MMC_TIMING_MMC_HS400) { 737 u32 bad_taps = priv->quirks ? priv->quirks->hs400_bad_taps : 0; 738 /* 739 * With HS400, the DAT signal is based on DS, not CLK. 740 * Therefore, use only CMD status. 741 */ 742 u32 smpcmp = sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_SMPCMP) & 743 SH_MOBILE_SDHI_SCC_SMPCMP_CMD_ERR; 744 if (!smpcmp) { 745 return false; /* no error in CMD signal */ 746 } else if (smpcmp == SH_MOBILE_SDHI_SCC_SMPCMP_CMD_REQUP) { 747 new_tap++; 748 error_tap--; 749 } else if (smpcmp == SH_MOBILE_SDHI_SCC_SMPCMP_CMD_REQDOWN) { 750 new_tap--; 751 error_tap++; 752 } else { 753 return true; /* need retune */ 754 } 755 756 /* 757 * When new_tap is a bad tap, we cannot change. Then, we compare 758 * with the HS200 tuning result. When smpcmp[error_tap] is OK, 759 * we can at least retune. 760 */ 761 if (bad_taps & BIT(new_tap % priv->tap_num)) 762 return test_bit(error_tap % priv->tap_num, priv->smpcmp); 763 } else { 764 if (val & SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR) 765 return true; /* need retune */ 766 else if (val & SH_MOBILE_SDHI_SCC_RVSREQ_REQTAPUP) 767 new_tap++; 768 else if (val & SH_MOBILE_SDHI_SCC_RVSREQ_REQTAPDOWN) 769 new_tap--; 770 else 771 return false; 772 } 773 774 priv->tap_set = (new_tap % priv->tap_num); 775 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, 776 priv->tap_set / (use_4tap ? 2 : 1)); 777 778 return false; 779 } 780 781 static bool renesas_sdhi_auto_correction(struct tmio_mmc_host *host) 782 { 783 struct renesas_sdhi *priv = host_to_priv(host); 784 785 /* Check SCC error */ 786 if (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ) & 787 SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR) { 788 sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0); 789 return true; 790 } 791 792 return false; 793 } 794 795 static bool renesas_sdhi_check_scc_error(struct tmio_mmc_host *host, 796 struct mmc_request *mrq) 797 { 798 struct renesas_sdhi *priv = host_to_priv(host); 799 bool use_4tap = priv->quirks && priv->quirks->hs400_4taps; 800 bool ret = false; 801 802 /* 803 * Skip checking SCC errors when running on 4 taps in HS400 mode as 804 * any retuning would still result in the same 4 taps being used. 805 */ 806 if (!(host->mmc->ios.timing == MMC_TIMING_UHS_SDR104) && 807 !(host->mmc->ios.timing == MMC_TIMING_MMC_HS200) && 808 !(host->mmc->ios.timing == MMC_TIMING_MMC_HS400 && !use_4tap)) 809 return false; 810 811 if (mmc_doing_tune(host->mmc)) 812 return false; 813 814 if (((mrq->cmd->error == -ETIMEDOUT) || 815 (mrq->data && mrq->data->error == -ETIMEDOUT)) && 816 ((host->mmc->caps & MMC_CAP_NONREMOVABLE) || 817 (host->ops.get_cd && host->ops.get_cd(host->mmc)))) 818 ret |= true; 819 820 if (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL) & 821 SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN) 822 ret |= renesas_sdhi_auto_correction(host); 823 else 824 ret |= renesas_sdhi_manual_correction(host, use_4tap); 825 826 return ret; 827 } 828 829 static int renesas_sdhi_wait_idle(struct tmio_mmc_host *host, u32 bit) 830 { 831 int timeout = 1000; 832 /* CBSY is set when busy, SCLKDIVEN is cleared when busy */ 833 u32 wait_state = (bit == TMIO_STAT_CMD_BUSY ? TMIO_STAT_CMD_BUSY : 0); 834 835 while (--timeout && (sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) 836 & bit) == wait_state) 837 udelay(1); 838 839 if (!timeout) { 840 dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n"); 841 return -EBUSY; 842 } 843 844 return 0; 845 } 846 847 static int renesas_sdhi_write16_hook(struct tmio_mmc_host *host, int addr) 848 { 849 u32 bit = TMIO_STAT_SCLKDIVEN; 850 851 switch (addr) { 852 case CTL_SD_CMD: 853 case CTL_STOP_INTERNAL_ACTION: 854 case CTL_XFER_BLK_COUNT: 855 case CTL_SD_XFER_LEN: 856 case CTL_SD_MEM_CARD_OPT: 857 case CTL_TRANSACTION_CTL: 858 case CTL_DMA_ENABLE: 859 case CTL_HOST_MODE: 860 if (host->pdata->flags & TMIO_MMC_HAVE_CBSY) 861 bit = TMIO_STAT_CMD_BUSY; 862 fallthrough; 863 case CTL_SD_CARD_CLK_CTL: 864 return renesas_sdhi_wait_idle(host, bit); 865 } 866 867 return 0; 868 } 869 870 static int renesas_sdhi_multi_io_quirk(struct mmc_card *card, 871 unsigned int direction, int blk_size) 872 { 873 /* 874 * In Renesas controllers, when performing a 875 * multiple block read of one or two blocks, 876 * depending on the timing with which the 877 * response register is read, the response 878 * value may not be read properly. 879 * Use single block read for this HW bug 880 */ 881 if ((direction == MMC_DATA_READ) && 882 blk_size == 2) 883 return 1; 884 885 return blk_size; 886 } 887 888 static void renesas_sdhi_fixup_request(struct tmio_mmc_host *host, struct mmc_request *mrq) 889 { 890 struct renesas_sdhi *priv = host_to_priv(host); 891 892 if (priv->needs_adjust_hs400 && mrq->cmd->opcode == MMC_SEND_STATUS) 893 renesas_sdhi_adjust_hs400_mode_enable(host); 894 } 895 static void renesas_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable) 896 { 897 /* Iff regs are 8 byte apart, sdbuf is 64 bit. Otherwise always 32. */ 898 int width = (host->bus_shift == 2) ? 64 : 32; 899 900 sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? DMA_ENABLE_DMASDRW : 0); 901 renesas_sdhi_sdbuf_width(host, enable ? width : 16); 902 } 903 904 int renesas_sdhi_probe(struct platform_device *pdev, 905 const struct tmio_mmc_dma_ops *dma_ops, 906 const struct renesas_sdhi_of_data *of_data, 907 const struct renesas_sdhi_quirks *quirks) 908 { 909 struct tmio_mmc_data *mmd = pdev->dev.platform_data; 910 struct tmio_mmc_data *mmc_data; 911 struct tmio_mmc_dma *dma_priv; 912 struct tmio_mmc_host *host; 913 struct renesas_sdhi *priv; 914 int num_irqs, irq, ret, i; 915 struct resource *res; 916 u16 ver; 917 918 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 919 if (!res) 920 return -EINVAL; 921 922 priv = devm_kzalloc(&pdev->dev, sizeof(struct renesas_sdhi), 923 GFP_KERNEL); 924 if (!priv) 925 return -ENOMEM; 926 927 priv->quirks = quirks; 928 mmc_data = &priv->mmc_data; 929 dma_priv = &priv->dma_priv; 930 931 priv->clk = devm_clk_get(&pdev->dev, NULL); 932 if (IS_ERR(priv->clk)) 933 return dev_err_probe(&pdev->dev, PTR_ERR(priv->clk), "cannot get clock"); 934 935 priv->clkh = devm_clk_get_optional(&pdev->dev, "clkh"); 936 if (IS_ERR(priv->clkh)) 937 return dev_err_probe(&pdev->dev, PTR_ERR(priv->clkh), "cannot get clkh"); 938 939 /* 940 * Some controllers provide a 2nd clock just to run the internal card 941 * detection logic. Unfortunately, the existing driver architecture does 942 * not support a separation of clocks for runtime PM usage. When 943 * native hotplug is used, the tmio driver assumes that the core 944 * must continue to run for card detect to stay active, so we cannot 945 * disable it. 946 * Additionally, it is prohibited to supply a clock to the core but not 947 * to the card detect circuit. That leaves us with if separate clocks 948 * are presented, we must treat them both as virtually 1 clock. 949 */ 950 priv->clk_cd = devm_clk_get_optional(&pdev->dev, "cd"); 951 if (IS_ERR(priv->clk_cd)) 952 return dev_err_probe(&pdev->dev, PTR_ERR(priv->clk_cd), "cannot get cd clock"); 953 954 priv->rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL); 955 if (IS_ERR(priv->rstc)) 956 return PTR_ERR(priv->rstc); 957 958 priv->pinctrl = devm_pinctrl_get(&pdev->dev); 959 if (!IS_ERR(priv->pinctrl)) { 960 priv->pins_default = pinctrl_lookup_state(priv->pinctrl, 961 PINCTRL_STATE_DEFAULT); 962 priv->pins_uhs = pinctrl_lookup_state(priv->pinctrl, 963 "state_uhs"); 964 } 965 966 host = tmio_mmc_host_alloc(pdev, mmc_data); 967 if (IS_ERR(host)) 968 return PTR_ERR(host); 969 970 if (of_data) { 971 mmc_data->flags |= of_data->tmio_flags; 972 mmc_data->ocr_mask = of_data->tmio_ocr_mask; 973 mmc_data->capabilities |= of_data->capabilities; 974 mmc_data->capabilities2 |= of_data->capabilities2; 975 mmc_data->dma_rx_offset = of_data->dma_rx_offset; 976 mmc_data->max_blk_count = of_data->max_blk_count; 977 mmc_data->max_segs = of_data->max_segs; 978 dma_priv->dma_buswidth = of_data->dma_buswidth; 979 host->bus_shift = of_data->bus_shift; 980 /* Fallback for old DTs */ 981 if (!priv->clkh && of_data->sdhi_flags & SDHI_FLAG_NEED_CLKH_FALLBACK) 982 priv->clkh = clk_get_parent(clk_get_parent(priv->clk)); 983 984 } 985 986 host->write16_hook = renesas_sdhi_write16_hook; 987 host->clk_enable = renesas_sdhi_clk_enable; 988 host->clk_disable = renesas_sdhi_clk_disable; 989 host->set_clock = renesas_sdhi_set_clock; 990 host->multi_io_quirk = renesas_sdhi_multi_io_quirk; 991 host->dma_ops = dma_ops; 992 993 if (quirks && quirks->hs400_disabled) 994 host->mmc->caps2 &= ~(MMC_CAP2_HS400 | MMC_CAP2_HS400_ES); 995 996 /* For some SoC, we disable internal WP. GPIO may override this */ 997 if (mmc_can_gpio_ro(host->mmc)) 998 mmc_data->capabilities2 &= ~MMC_CAP2_NO_WRITE_PROTECT; 999 1000 /* SDR speeds are only available on Gen2+ */ 1001 if (mmc_data->flags & TMIO_MMC_MIN_RCAR2) { 1002 /* card_busy caused issues on r8a73a4 (pre-Gen2) CD-less SDHI */ 1003 host->ops.card_busy = renesas_sdhi_card_busy; 1004 host->ops.start_signal_voltage_switch = 1005 renesas_sdhi_start_signal_voltage_switch; 1006 host->sdcard_irq_setbit_mask = TMIO_STAT_ALWAYS_SET_27; 1007 host->sdcard_irq_mask_all = TMIO_MASK_ALL_RCAR2; 1008 host->reset = renesas_sdhi_reset; 1009 } 1010 1011 /* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */ 1012 if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */ 1013 host->bus_shift = 1; 1014 1015 if (mmd) 1016 *mmc_data = *mmd; 1017 1018 dma_priv->filter = shdma_chan_filter; 1019 dma_priv->enable = renesas_sdhi_enable_dma; 1020 1021 mmc_data->alignment_shift = 1; /* 2-byte alignment */ 1022 mmc_data->capabilities |= MMC_CAP_MMC_HIGHSPEED; 1023 1024 /* 1025 * All SDHI blocks support 2-byte and larger block sizes in 4-bit 1026 * bus width mode. 1027 */ 1028 mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES; 1029 1030 /* 1031 * All SDHI blocks support SDIO IRQ signalling. 1032 */ 1033 mmc_data->flags |= TMIO_MMC_SDIO_IRQ; 1034 1035 /* All SDHI have CMD12 control bit */ 1036 mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL; 1037 1038 /* All SDHI have SDIO status bits which must be 1 */ 1039 mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS; 1040 1041 /* All SDHI support HW busy detection */ 1042 mmc_data->flags |= TMIO_MMC_USE_BUSY_TIMEOUT; 1043 1044 dev_pm_domain_start(&pdev->dev); 1045 1046 ret = renesas_sdhi_clk_enable(host); 1047 if (ret) 1048 goto efree; 1049 1050 ver = sd_ctrl_read16(host, CTL_VERSION); 1051 /* GEN2_SDR104 is first known SDHI to use 32bit block count */ 1052 if (ver < SDHI_VER_GEN2_SDR104 && mmc_data->max_blk_count > U16_MAX) 1053 mmc_data->max_blk_count = U16_MAX; 1054 1055 /* One Gen2 SDHI incarnation does NOT have a CBSY bit */ 1056 if (ver == SDHI_VER_GEN2_SDR50) 1057 mmc_data->flags &= ~TMIO_MMC_HAVE_CBSY; 1058 1059 if (ver == SDHI_VER_GEN3_SDMMC && quirks && quirks->hs400_calib_table) { 1060 host->fixup_request = renesas_sdhi_fixup_request; 1061 priv->adjust_hs400_calib_table = *( 1062 res->start == SDHI_GEN3_MMC0_ADDR ? 1063 quirks->hs400_calib_table : 1064 quirks->hs400_calib_table + 1); 1065 } 1066 1067 /* these have an EXTOP bit */ 1068 if (ver >= SDHI_VER_GEN3_SD) 1069 host->get_timeout_cycles = renesas_sdhi_gen3_get_cycles; 1070 1071 /* Enable tuning iff we have an SCC and a supported mode */ 1072 if (of_data && of_data->scc_offset && 1073 (host->mmc->caps & MMC_CAP_UHS_SDR104 || 1074 host->mmc->caps2 & (MMC_CAP2_HS200_1_8V_SDR | 1075 MMC_CAP2_HS400_1_8V))) { 1076 const struct renesas_sdhi_scc *taps = of_data->taps; 1077 bool use_4tap = quirks && quirks->hs400_4taps; 1078 bool hit = false; 1079 1080 for (i = 0; i < of_data->taps_num; i++) { 1081 if (taps[i].clk_rate == 0 || 1082 taps[i].clk_rate == host->mmc->f_max) { 1083 priv->scc_tappos = taps->tap; 1084 priv->scc_tappos_hs400 = use_4tap ? 1085 taps->tap_hs400_4tap : 1086 taps->tap; 1087 hit = true; 1088 break; 1089 } 1090 } 1091 1092 if (!hit) 1093 dev_warn(&host->pdev->dev, "Unknown clock rate for tuning\n"); 1094 1095 priv->scc_ctl = host->ctl + of_data->scc_offset; 1096 host->check_retune = renesas_sdhi_check_scc_error; 1097 host->ops.execute_tuning = renesas_sdhi_execute_tuning; 1098 host->ops.prepare_hs400_tuning = renesas_sdhi_prepare_hs400_tuning; 1099 host->ops.hs400_downgrade = renesas_sdhi_disable_scc; 1100 host->ops.hs400_complete = renesas_sdhi_hs400_complete; 1101 } 1102 1103 ret = tmio_mmc_host_probe(host); 1104 if (ret < 0) 1105 goto edisclk; 1106 1107 num_irqs = platform_irq_count(pdev); 1108 if (num_irqs < 0) { 1109 ret = num_irqs; 1110 goto eirq; 1111 } 1112 1113 /* There must be at least one IRQ source */ 1114 if (!num_irqs) { 1115 ret = -ENXIO; 1116 goto eirq; 1117 } 1118 1119 for (i = 0; i < num_irqs; i++) { 1120 irq = platform_get_irq(pdev, i); 1121 if (irq < 0) { 1122 ret = irq; 1123 goto eirq; 1124 } 1125 1126 ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0, 1127 dev_name(&pdev->dev), host); 1128 if (ret) 1129 goto eirq; 1130 } 1131 1132 dev_info(&pdev->dev, "%s base at %pa, max clock rate %u MHz\n", 1133 mmc_hostname(host->mmc), &res->start, host->mmc->f_max / 1000000); 1134 1135 return ret; 1136 1137 eirq: 1138 tmio_mmc_host_remove(host); 1139 edisclk: 1140 renesas_sdhi_clk_disable(host); 1141 efree: 1142 tmio_mmc_host_free(host); 1143 1144 return ret; 1145 } 1146 EXPORT_SYMBOL_GPL(renesas_sdhi_probe); 1147 1148 int renesas_sdhi_remove(struct platform_device *pdev) 1149 { 1150 struct tmio_mmc_host *host = platform_get_drvdata(pdev); 1151 1152 tmio_mmc_host_remove(host); 1153 renesas_sdhi_clk_disable(host); 1154 tmio_mmc_host_free(host); 1155 1156 return 0; 1157 } 1158 EXPORT_SYMBOL_GPL(renesas_sdhi_remove); 1159 1160 MODULE_LICENSE("GPL v2"); 1161