1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2010 Google, Inc. 4 */ 5 6 #include <linux/delay.h> 7 #include <linux/dma-mapping.h> 8 #include <linux/err.h> 9 #include <linux/module.h> 10 #include <linux/init.h> 11 #include <linux/iopoll.h> 12 #include <linux/platform_device.h> 13 #include <linux/clk.h> 14 #include <linux/io.h> 15 #include <linux/of.h> 16 #include <linux/of_device.h> 17 #include <linux/pinctrl/consumer.h> 18 #include <linux/pm_opp.h> 19 #include <linux/pm_runtime.h> 20 #include <linux/regulator/consumer.h> 21 #include <linux/reset.h> 22 #include <linux/mmc/card.h> 23 #include <linux/mmc/host.h> 24 #include <linux/mmc/mmc.h> 25 #include <linux/mmc/slot-gpio.h> 26 #include <linux/gpio/consumer.h> 27 #include <linux/ktime.h> 28 29 #include <soc/tegra/common.h> 30 31 #include "sdhci-pltfm.h" 32 #include "cqhci.h" 33 34 /* Tegra SDHOST controller vendor register definitions */ 35 #define SDHCI_TEGRA_VENDOR_CLOCK_CTRL 0x100 36 #define SDHCI_CLOCK_CTRL_TAP_MASK 0x00ff0000 37 #define SDHCI_CLOCK_CTRL_TAP_SHIFT 16 38 #define SDHCI_CLOCK_CTRL_TRIM_MASK 0x1f000000 39 #define SDHCI_CLOCK_CTRL_TRIM_SHIFT 24 40 #define SDHCI_CLOCK_CTRL_SDR50_TUNING_OVERRIDE BIT(5) 41 #define SDHCI_CLOCK_CTRL_PADPIPE_CLKEN_OVERRIDE BIT(3) 42 #define SDHCI_CLOCK_CTRL_SPI_MODE_CLKEN_OVERRIDE BIT(2) 43 44 #define SDHCI_TEGRA_VENDOR_SYS_SW_CTRL 0x104 45 #define SDHCI_TEGRA_SYS_SW_CTRL_ENHANCED_STROBE BIT(31) 46 47 #define SDHCI_TEGRA_VENDOR_CAP_OVERRIDES 0x10c 48 #define SDHCI_TEGRA_CAP_OVERRIDES_DQS_TRIM_MASK 0x00003f00 49 #define SDHCI_TEGRA_CAP_OVERRIDES_DQS_TRIM_SHIFT 8 50 51 #define SDHCI_TEGRA_VENDOR_MISC_CTRL 0x120 52 #define SDHCI_MISC_CTRL_ERASE_TIMEOUT_LIMIT BIT(0) 53 #define SDHCI_MISC_CTRL_ENABLE_SDR104 0x8 54 #define SDHCI_MISC_CTRL_ENABLE_SDR50 0x10 55 #define SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300 0x20 56 #define SDHCI_MISC_CTRL_ENABLE_DDR50 0x200 57 58 #define SDHCI_TEGRA_VENDOR_DLLCAL_CFG 0x1b0 59 #define SDHCI_TEGRA_DLLCAL_CALIBRATE BIT(31) 60 61 #define SDHCI_TEGRA_VENDOR_DLLCAL_STA 0x1bc 62 #define SDHCI_TEGRA_DLLCAL_STA_ACTIVE BIT(31) 63 64 #define SDHCI_VNDR_TUN_CTRL0_0 0x1c0 65 #define SDHCI_VNDR_TUN_CTRL0_TUN_HW_TAP 0x20000 66 #define SDHCI_VNDR_TUN_CTRL0_START_TAP_VAL_MASK 0x03fc0000 67 #define SDHCI_VNDR_TUN_CTRL0_START_TAP_VAL_SHIFT 18 68 #define SDHCI_VNDR_TUN_CTRL0_MUL_M_MASK 0x00001fc0 69 #define SDHCI_VNDR_TUN_CTRL0_MUL_M_SHIFT 6 70 #define SDHCI_VNDR_TUN_CTRL0_TUN_ITER_MASK 0x000e000 71 #define SDHCI_VNDR_TUN_CTRL0_TUN_ITER_SHIFT 13 72 #define TRIES_128 2 73 #define TRIES_256 4 74 #define SDHCI_VNDR_TUN_CTRL0_TUN_WORD_SEL_MASK 0x7 75 76 #define SDHCI_TEGRA_VNDR_TUN_CTRL1_0 0x1c4 77 #define SDHCI_TEGRA_VNDR_TUN_STATUS0 0x1C8 78 #define SDHCI_TEGRA_VNDR_TUN_STATUS1 0x1CC 79 #define SDHCI_TEGRA_VNDR_TUN_STATUS1_TAP_MASK 0xFF 80 #define SDHCI_TEGRA_VNDR_TUN_STATUS1_END_TAP_SHIFT 0x8 81 #define TUNING_WORD_BIT_SIZE 32 82 83 #define SDHCI_TEGRA_AUTO_CAL_CONFIG 0x1e4 84 #define SDHCI_AUTO_CAL_START BIT(31) 85 #define SDHCI_AUTO_CAL_ENABLE BIT(29) 86 #define SDHCI_AUTO_CAL_PDPU_OFFSET_MASK 0x0000ffff 87 88 #define SDHCI_TEGRA_SDMEM_COMP_PADCTRL 0x1e0 89 #define SDHCI_TEGRA_SDMEM_COMP_PADCTRL_VREF_SEL_MASK 0x0000000f 90 #define SDHCI_TEGRA_SDMEM_COMP_PADCTRL_VREF_SEL_VAL 0x7 91 #define SDHCI_TEGRA_SDMEM_COMP_PADCTRL_E_INPUT_E_PWRD BIT(31) 92 #define SDHCI_COMP_PADCTRL_DRVUPDN_OFFSET_MASK 0x07FFF000 93 94 #define SDHCI_TEGRA_AUTO_CAL_STATUS 0x1ec 95 #define SDHCI_TEGRA_AUTO_CAL_ACTIVE BIT(31) 96 97 #define NVQUIRK_FORCE_SDHCI_SPEC_200 BIT(0) 98 #define NVQUIRK_ENABLE_BLOCK_GAP_DET BIT(1) 99 #define NVQUIRK_ENABLE_SDHCI_SPEC_300 BIT(2) 100 #define NVQUIRK_ENABLE_SDR50 BIT(3) 101 #define NVQUIRK_ENABLE_SDR104 BIT(4) 102 #define NVQUIRK_ENABLE_DDR50 BIT(5) 103 /* 104 * HAS_PADCALIB NVQUIRK is for SoC's supporting auto calibration of pads 105 * drive strength. 106 */ 107 #define NVQUIRK_HAS_PADCALIB BIT(6) 108 /* 109 * NEEDS_PAD_CONTROL NVQUIRK is for SoC's having separate 3V3 and 1V8 pads. 110 * 3V3/1V8 pad selection happens through pinctrl state selection depending 111 * on the signaling mode. 112 */ 113 #define NVQUIRK_NEEDS_PAD_CONTROL BIT(7) 114 #define NVQUIRK_DIS_CARD_CLK_CONFIG_TAP BIT(8) 115 #define NVQUIRK_CQHCI_DCMD_R1B_CMD_TIMING BIT(9) 116 117 /* 118 * NVQUIRK_HAS_TMCLK is for SoC's having separate timeout clock for Tegra 119 * SDMMC hardware data timeout. 120 */ 121 #define NVQUIRK_HAS_TMCLK BIT(10) 122 123 #define NVQUIRK_HAS_ANDROID_GPT_SECTOR BIT(11) 124 125 /* SDMMC CQE Base Address for Tegra Host Ver 4.1 and Higher */ 126 #define SDHCI_TEGRA_CQE_BASE_ADDR 0xF000 127 128 #define SDHCI_TEGRA_CQE_TRNS_MODE (SDHCI_TRNS_MULTI | \ 129 SDHCI_TRNS_BLK_CNT_EN | \ 130 SDHCI_TRNS_DMA) 131 132 struct sdhci_tegra_soc_data { 133 const struct sdhci_pltfm_data *pdata; 134 u64 dma_mask; 135 u32 nvquirks; 136 u8 min_tap_delay; 137 u8 max_tap_delay; 138 }; 139 140 /* Magic pull up and pull down pad calibration offsets */ 141 struct sdhci_tegra_autocal_offsets { 142 u32 pull_up_3v3; 143 u32 pull_down_3v3; 144 u32 pull_up_3v3_timeout; 145 u32 pull_down_3v3_timeout; 146 u32 pull_up_1v8; 147 u32 pull_down_1v8; 148 u32 pull_up_1v8_timeout; 149 u32 pull_down_1v8_timeout; 150 u32 pull_up_sdr104; 151 u32 pull_down_sdr104; 152 u32 pull_up_hs400; 153 u32 pull_down_hs400; 154 }; 155 156 struct sdhci_tegra { 157 const struct sdhci_tegra_soc_data *soc_data; 158 struct gpio_desc *power_gpio; 159 struct clk *tmclk; 160 bool ddr_signaling; 161 bool pad_calib_required; 162 bool pad_control_available; 163 164 struct reset_control *rst; 165 struct pinctrl *pinctrl_sdmmc; 166 struct pinctrl_state *pinctrl_state_3v3; 167 struct pinctrl_state *pinctrl_state_1v8; 168 struct pinctrl_state *pinctrl_state_3v3_drv; 169 struct pinctrl_state *pinctrl_state_1v8_drv; 170 171 struct sdhci_tegra_autocal_offsets autocal_offsets; 172 ktime_t last_calib; 173 174 u32 default_tap; 175 u32 default_trim; 176 u32 dqs_trim; 177 bool enable_hwcq; 178 unsigned long curr_clk_rate; 179 u8 tuned_tap_delay; 180 }; 181 182 static u16 tegra_sdhci_readw(struct sdhci_host *host, int reg) 183 { 184 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 185 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 186 const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data; 187 188 if (unlikely((soc_data->nvquirks & NVQUIRK_FORCE_SDHCI_SPEC_200) && 189 (reg == SDHCI_HOST_VERSION))) { 190 /* Erratum: Version register is invalid in HW. */ 191 return SDHCI_SPEC_200; 192 } 193 194 return readw(host->ioaddr + reg); 195 } 196 197 static void tegra_sdhci_writew(struct sdhci_host *host, u16 val, int reg) 198 { 199 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 200 201 switch (reg) { 202 case SDHCI_TRANSFER_MODE: 203 /* 204 * Postpone this write, we must do it together with a 205 * command write that is down below. 206 */ 207 pltfm_host->xfer_mode_shadow = val; 208 return; 209 case SDHCI_COMMAND: 210 writel((val << 16) | pltfm_host->xfer_mode_shadow, 211 host->ioaddr + SDHCI_TRANSFER_MODE); 212 return; 213 } 214 215 writew(val, host->ioaddr + reg); 216 } 217 218 static void tegra_sdhci_writel(struct sdhci_host *host, u32 val, int reg) 219 { 220 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 221 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 222 const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data; 223 224 /* Seems like we're getting spurious timeout and crc errors, so 225 * disable signalling of them. In case of real errors software 226 * timers should take care of eventually detecting them. 227 */ 228 if (unlikely(reg == SDHCI_SIGNAL_ENABLE)) 229 val &= ~(SDHCI_INT_TIMEOUT|SDHCI_INT_CRC); 230 231 writel(val, host->ioaddr + reg); 232 233 if (unlikely((soc_data->nvquirks & NVQUIRK_ENABLE_BLOCK_GAP_DET) && 234 (reg == SDHCI_INT_ENABLE))) { 235 /* Erratum: Must enable block gap interrupt detection */ 236 u8 gap_ctrl = readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL); 237 if (val & SDHCI_INT_CARD_INT) 238 gap_ctrl |= 0x8; 239 else 240 gap_ctrl &= ~0x8; 241 writeb(gap_ctrl, host->ioaddr + SDHCI_BLOCK_GAP_CONTROL); 242 } 243 } 244 245 static bool tegra_sdhci_configure_card_clk(struct sdhci_host *host, bool enable) 246 { 247 bool status; 248 u32 reg; 249 250 reg = sdhci_readw(host, SDHCI_CLOCK_CONTROL); 251 status = !!(reg & SDHCI_CLOCK_CARD_EN); 252 253 if (status == enable) 254 return status; 255 256 if (enable) 257 reg |= SDHCI_CLOCK_CARD_EN; 258 else 259 reg &= ~SDHCI_CLOCK_CARD_EN; 260 261 sdhci_writew(host, reg, SDHCI_CLOCK_CONTROL); 262 263 return status; 264 } 265 266 static void tegra210_sdhci_writew(struct sdhci_host *host, u16 val, int reg) 267 { 268 bool is_tuning_cmd = 0; 269 bool clk_enabled; 270 u8 cmd; 271 272 if (reg == SDHCI_COMMAND) { 273 cmd = SDHCI_GET_CMD(val); 274 is_tuning_cmd = cmd == MMC_SEND_TUNING_BLOCK || 275 cmd == MMC_SEND_TUNING_BLOCK_HS200; 276 } 277 278 if (is_tuning_cmd) 279 clk_enabled = tegra_sdhci_configure_card_clk(host, 0); 280 281 writew(val, host->ioaddr + reg); 282 283 if (is_tuning_cmd) { 284 udelay(1); 285 sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 286 tegra_sdhci_configure_card_clk(host, clk_enabled); 287 } 288 } 289 290 static unsigned int tegra_sdhci_get_ro(struct sdhci_host *host) 291 { 292 /* 293 * Write-enable shall be assumed if GPIO is missing in a board's 294 * device-tree because SDHCI's WRITE_PROTECT bit doesn't work on 295 * Tegra. 296 */ 297 return mmc_gpio_get_ro(host->mmc); 298 } 299 300 static bool tegra_sdhci_is_pad_and_regulator_valid(struct sdhci_host *host) 301 { 302 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 303 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 304 int has_1v8, has_3v3; 305 306 /* 307 * The SoCs which have NVQUIRK_NEEDS_PAD_CONTROL require software pad 308 * voltage configuration in order to perform voltage switching. This 309 * means that valid pinctrl info is required on SDHCI instances capable 310 * of performing voltage switching. Whether or not an SDHCI instance is 311 * capable of voltage switching is determined based on the regulator. 312 */ 313 314 if (!(tegra_host->soc_data->nvquirks & NVQUIRK_NEEDS_PAD_CONTROL)) 315 return true; 316 317 if (IS_ERR(host->mmc->supply.vqmmc)) 318 return false; 319 320 has_1v8 = regulator_is_supported_voltage(host->mmc->supply.vqmmc, 321 1700000, 1950000); 322 323 has_3v3 = regulator_is_supported_voltage(host->mmc->supply.vqmmc, 324 2700000, 3600000); 325 326 if (has_1v8 == 1 && has_3v3 == 1) 327 return tegra_host->pad_control_available; 328 329 /* Fixed voltage, no pad control required. */ 330 return true; 331 } 332 333 static void tegra_sdhci_set_tap(struct sdhci_host *host, unsigned int tap) 334 { 335 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 336 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 337 const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data; 338 bool card_clk_enabled = false; 339 u32 reg; 340 341 /* 342 * Touching the tap values is a bit tricky on some SoC generations. 343 * The quirk enables a workaround for a glitch that sometimes occurs if 344 * the tap values are changed. 345 */ 346 347 if (soc_data->nvquirks & NVQUIRK_DIS_CARD_CLK_CONFIG_TAP) 348 card_clk_enabled = tegra_sdhci_configure_card_clk(host, false); 349 350 reg = sdhci_readl(host, SDHCI_TEGRA_VENDOR_CLOCK_CTRL); 351 reg &= ~SDHCI_CLOCK_CTRL_TAP_MASK; 352 reg |= tap << SDHCI_CLOCK_CTRL_TAP_SHIFT; 353 sdhci_writel(host, reg, SDHCI_TEGRA_VENDOR_CLOCK_CTRL); 354 355 if (soc_data->nvquirks & NVQUIRK_DIS_CARD_CLK_CONFIG_TAP && 356 card_clk_enabled) { 357 udelay(1); 358 sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 359 tegra_sdhci_configure_card_clk(host, card_clk_enabled); 360 } 361 } 362 363 static void tegra_sdhci_reset(struct sdhci_host *host, u8 mask) 364 { 365 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 366 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 367 const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data; 368 u32 misc_ctrl, clk_ctrl, pad_ctrl; 369 370 sdhci_reset(host, mask); 371 372 if (!(mask & SDHCI_RESET_ALL)) 373 return; 374 375 tegra_sdhci_set_tap(host, tegra_host->default_tap); 376 377 misc_ctrl = sdhci_readl(host, SDHCI_TEGRA_VENDOR_MISC_CTRL); 378 clk_ctrl = sdhci_readl(host, SDHCI_TEGRA_VENDOR_CLOCK_CTRL); 379 380 misc_ctrl &= ~(SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300 | 381 SDHCI_MISC_CTRL_ENABLE_SDR50 | 382 SDHCI_MISC_CTRL_ENABLE_DDR50 | 383 SDHCI_MISC_CTRL_ENABLE_SDR104); 384 385 clk_ctrl &= ~(SDHCI_CLOCK_CTRL_TRIM_MASK | 386 SDHCI_CLOCK_CTRL_SPI_MODE_CLKEN_OVERRIDE); 387 388 if (tegra_sdhci_is_pad_and_regulator_valid(host)) { 389 /* Erratum: Enable SDHCI spec v3.00 support */ 390 if (soc_data->nvquirks & NVQUIRK_ENABLE_SDHCI_SPEC_300) 391 misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300; 392 /* Advertise UHS modes as supported by host */ 393 if (soc_data->nvquirks & NVQUIRK_ENABLE_SDR50) 394 misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDR50; 395 if (soc_data->nvquirks & NVQUIRK_ENABLE_DDR50) 396 misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_DDR50; 397 if (soc_data->nvquirks & NVQUIRK_ENABLE_SDR104) 398 misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDR104; 399 if (soc_data->nvquirks & NVQUIRK_ENABLE_SDR50) 400 clk_ctrl |= SDHCI_CLOCK_CTRL_SDR50_TUNING_OVERRIDE; 401 } 402 403 clk_ctrl |= tegra_host->default_trim << SDHCI_CLOCK_CTRL_TRIM_SHIFT; 404 405 sdhci_writel(host, misc_ctrl, SDHCI_TEGRA_VENDOR_MISC_CTRL); 406 sdhci_writel(host, clk_ctrl, SDHCI_TEGRA_VENDOR_CLOCK_CTRL); 407 408 if (soc_data->nvquirks & NVQUIRK_HAS_PADCALIB) { 409 pad_ctrl = sdhci_readl(host, SDHCI_TEGRA_SDMEM_COMP_PADCTRL); 410 pad_ctrl &= ~SDHCI_TEGRA_SDMEM_COMP_PADCTRL_VREF_SEL_MASK; 411 pad_ctrl |= SDHCI_TEGRA_SDMEM_COMP_PADCTRL_VREF_SEL_VAL; 412 sdhci_writel(host, pad_ctrl, SDHCI_TEGRA_SDMEM_COMP_PADCTRL); 413 414 tegra_host->pad_calib_required = true; 415 } 416 417 tegra_host->ddr_signaling = false; 418 } 419 420 static void tegra_sdhci_configure_cal_pad(struct sdhci_host *host, bool enable) 421 { 422 u32 val; 423 424 /* 425 * Enable or disable the additional I/O pad used by the drive strength 426 * calibration process. 427 */ 428 val = sdhci_readl(host, SDHCI_TEGRA_SDMEM_COMP_PADCTRL); 429 430 if (enable) 431 val |= SDHCI_TEGRA_SDMEM_COMP_PADCTRL_E_INPUT_E_PWRD; 432 else 433 val &= ~SDHCI_TEGRA_SDMEM_COMP_PADCTRL_E_INPUT_E_PWRD; 434 435 sdhci_writel(host, val, SDHCI_TEGRA_SDMEM_COMP_PADCTRL); 436 437 if (enable) 438 usleep_range(1, 2); 439 } 440 441 static void tegra_sdhci_set_pad_autocal_offset(struct sdhci_host *host, 442 u16 pdpu) 443 { 444 u32 reg; 445 446 reg = sdhci_readl(host, SDHCI_TEGRA_AUTO_CAL_CONFIG); 447 reg &= ~SDHCI_AUTO_CAL_PDPU_OFFSET_MASK; 448 reg |= pdpu; 449 sdhci_writel(host, reg, SDHCI_TEGRA_AUTO_CAL_CONFIG); 450 } 451 452 static int tegra_sdhci_set_padctrl(struct sdhci_host *host, int voltage, 453 bool state_drvupdn) 454 { 455 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 456 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 457 struct sdhci_tegra_autocal_offsets *offsets = 458 &tegra_host->autocal_offsets; 459 struct pinctrl_state *pinctrl_drvupdn = NULL; 460 int ret = 0; 461 u8 drvup = 0, drvdn = 0; 462 u32 reg; 463 464 if (!state_drvupdn) { 465 /* PADS Drive Strength */ 466 if (voltage == MMC_SIGNAL_VOLTAGE_180) { 467 if (tegra_host->pinctrl_state_1v8_drv) { 468 pinctrl_drvupdn = 469 tegra_host->pinctrl_state_1v8_drv; 470 } else { 471 drvup = offsets->pull_up_1v8_timeout; 472 drvdn = offsets->pull_down_1v8_timeout; 473 } 474 } else { 475 if (tegra_host->pinctrl_state_3v3_drv) { 476 pinctrl_drvupdn = 477 tegra_host->pinctrl_state_3v3_drv; 478 } else { 479 drvup = offsets->pull_up_3v3_timeout; 480 drvdn = offsets->pull_down_3v3_timeout; 481 } 482 } 483 484 if (pinctrl_drvupdn != NULL) { 485 ret = pinctrl_select_state(tegra_host->pinctrl_sdmmc, 486 pinctrl_drvupdn); 487 if (ret < 0) 488 dev_err(mmc_dev(host->mmc), 489 "failed pads drvupdn, ret: %d\n", ret); 490 } else if ((drvup) || (drvdn)) { 491 reg = sdhci_readl(host, 492 SDHCI_TEGRA_SDMEM_COMP_PADCTRL); 493 reg &= ~SDHCI_COMP_PADCTRL_DRVUPDN_OFFSET_MASK; 494 reg |= (drvup << 20) | (drvdn << 12); 495 sdhci_writel(host, reg, 496 SDHCI_TEGRA_SDMEM_COMP_PADCTRL); 497 } 498 499 } else { 500 /* Dual Voltage PADS Voltage selection */ 501 if (!tegra_host->pad_control_available) 502 return 0; 503 504 if (voltage == MMC_SIGNAL_VOLTAGE_180) { 505 ret = pinctrl_select_state(tegra_host->pinctrl_sdmmc, 506 tegra_host->pinctrl_state_1v8); 507 if (ret < 0) 508 dev_err(mmc_dev(host->mmc), 509 "setting 1.8V failed, ret: %d\n", ret); 510 } else { 511 ret = pinctrl_select_state(tegra_host->pinctrl_sdmmc, 512 tegra_host->pinctrl_state_3v3); 513 if (ret < 0) 514 dev_err(mmc_dev(host->mmc), 515 "setting 3.3V failed, ret: %d\n", ret); 516 } 517 } 518 519 return ret; 520 } 521 522 static void tegra_sdhci_pad_autocalib(struct sdhci_host *host) 523 { 524 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 525 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 526 struct sdhci_tegra_autocal_offsets offsets = 527 tegra_host->autocal_offsets; 528 struct mmc_ios *ios = &host->mmc->ios; 529 bool card_clk_enabled; 530 u16 pdpu; 531 u32 reg; 532 int ret; 533 534 switch (ios->timing) { 535 case MMC_TIMING_UHS_SDR104: 536 pdpu = offsets.pull_down_sdr104 << 8 | offsets.pull_up_sdr104; 537 break; 538 case MMC_TIMING_MMC_HS400: 539 pdpu = offsets.pull_down_hs400 << 8 | offsets.pull_up_hs400; 540 break; 541 default: 542 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) 543 pdpu = offsets.pull_down_1v8 << 8 | offsets.pull_up_1v8; 544 else 545 pdpu = offsets.pull_down_3v3 << 8 | offsets.pull_up_3v3; 546 } 547 548 /* Set initial offset before auto-calibration */ 549 tegra_sdhci_set_pad_autocal_offset(host, pdpu); 550 551 card_clk_enabled = tegra_sdhci_configure_card_clk(host, false); 552 553 tegra_sdhci_configure_cal_pad(host, true); 554 555 reg = sdhci_readl(host, SDHCI_TEGRA_AUTO_CAL_CONFIG); 556 reg |= SDHCI_AUTO_CAL_ENABLE | SDHCI_AUTO_CAL_START; 557 sdhci_writel(host, reg, SDHCI_TEGRA_AUTO_CAL_CONFIG); 558 559 usleep_range(1, 2); 560 /* 10 ms timeout */ 561 ret = readl_poll_timeout(host->ioaddr + SDHCI_TEGRA_AUTO_CAL_STATUS, 562 reg, !(reg & SDHCI_TEGRA_AUTO_CAL_ACTIVE), 563 1000, 10000); 564 565 tegra_sdhci_configure_cal_pad(host, false); 566 567 tegra_sdhci_configure_card_clk(host, card_clk_enabled); 568 569 if (ret) { 570 dev_err(mmc_dev(host->mmc), "Pad autocal timed out\n"); 571 572 /* Disable automatic cal and use fixed Drive Strengths */ 573 reg = sdhci_readl(host, SDHCI_TEGRA_AUTO_CAL_CONFIG); 574 reg &= ~SDHCI_AUTO_CAL_ENABLE; 575 sdhci_writel(host, reg, SDHCI_TEGRA_AUTO_CAL_CONFIG); 576 577 ret = tegra_sdhci_set_padctrl(host, ios->signal_voltage, false); 578 if (ret < 0) 579 dev_err(mmc_dev(host->mmc), 580 "Setting drive strengths failed: %d\n", ret); 581 } 582 } 583 584 static void tegra_sdhci_parse_pad_autocal_dt(struct sdhci_host *host) 585 { 586 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 587 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 588 struct sdhci_tegra_autocal_offsets *autocal = 589 &tegra_host->autocal_offsets; 590 int err; 591 592 err = device_property_read_u32(mmc_dev(host->mmc), 593 "nvidia,pad-autocal-pull-up-offset-3v3", 594 &autocal->pull_up_3v3); 595 if (err) 596 autocal->pull_up_3v3 = 0; 597 598 err = device_property_read_u32(mmc_dev(host->mmc), 599 "nvidia,pad-autocal-pull-down-offset-3v3", 600 &autocal->pull_down_3v3); 601 if (err) 602 autocal->pull_down_3v3 = 0; 603 604 err = device_property_read_u32(mmc_dev(host->mmc), 605 "nvidia,pad-autocal-pull-up-offset-1v8", 606 &autocal->pull_up_1v8); 607 if (err) 608 autocal->pull_up_1v8 = 0; 609 610 err = device_property_read_u32(mmc_dev(host->mmc), 611 "nvidia,pad-autocal-pull-down-offset-1v8", 612 &autocal->pull_down_1v8); 613 if (err) 614 autocal->pull_down_1v8 = 0; 615 616 err = device_property_read_u32(mmc_dev(host->mmc), 617 "nvidia,pad-autocal-pull-up-offset-sdr104", 618 &autocal->pull_up_sdr104); 619 if (err) 620 autocal->pull_up_sdr104 = autocal->pull_up_1v8; 621 622 err = device_property_read_u32(mmc_dev(host->mmc), 623 "nvidia,pad-autocal-pull-down-offset-sdr104", 624 &autocal->pull_down_sdr104); 625 if (err) 626 autocal->pull_down_sdr104 = autocal->pull_down_1v8; 627 628 err = device_property_read_u32(mmc_dev(host->mmc), 629 "nvidia,pad-autocal-pull-up-offset-hs400", 630 &autocal->pull_up_hs400); 631 if (err) 632 autocal->pull_up_hs400 = autocal->pull_up_1v8; 633 634 err = device_property_read_u32(mmc_dev(host->mmc), 635 "nvidia,pad-autocal-pull-down-offset-hs400", 636 &autocal->pull_down_hs400); 637 if (err) 638 autocal->pull_down_hs400 = autocal->pull_down_1v8; 639 640 /* 641 * Different fail-safe drive strength values based on the signaling 642 * voltage are applicable for SoCs supporting 3V3 and 1V8 pad controls. 643 * So, avoid reading below device tree properties for SoCs that don't 644 * have NVQUIRK_NEEDS_PAD_CONTROL. 645 */ 646 if (!(tegra_host->soc_data->nvquirks & NVQUIRK_NEEDS_PAD_CONTROL)) 647 return; 648 649 err = device_property_read_u32(mmc_dev(host->mmc), 650 "nvidia,pad-autocal-pull-up-offset-3v3-timeout", 651 &autocal->pull_up_3v3_timeout); 652 if (err) { 653 if (!IS_ERR(tegra_host->pinctrl_state_3v3) && 654 (tegra_host->pinctrl_state_3v3_drv == NULL)) 655 pr_warn("%s: Missing autocal timeout 3v3-pad drvs\n", 656 mmc_hostname(host->mmc)); 657 autocal->pull_up_3v3_timeout = 0; 658 } 659 660 err = device_property_read_u32(mmc_dev(host->mmc), 661 "nvidia,pad-autocal-pull-down-offset-3v3-timeout", 662 &autocal->pull_down_3v3_timeout); 663 if (err) { 664 if (!IS_ERR(tegra_host->pinctrl_state_3v3) && 665 (tegra_host->pinctrl_state_3v3_drv == NULL)) 666 pr_warn("%s: Missing autocal timeout 3v3-pad drvs\n", 667 mmc_hostname(host->mmc)); 668 autocal->pull_down_3v3_timeout = 0; 669 } 670 671 err = device_property_read_u32(mmc_dev(host->mmc), 672 "nvidia,pad-autocal-pull-up-offset-1v8-timeout", 673 &autocal->pull_up_1v8_timeout); 674 if (err) { 675 if (!IS_ERR(tegra_host->pinctrl_state_1v8) && 676 (tegra_host->pinctrl_state_1v8_drv == NULL)) 677 pr_warn("%s: Missing autocal timeout 1v8-pad drvs\n", 678 mmc_hostname(host->mmc)); 679 autocal->pull_up_1v8_timeout = 0; 680 } 681 682 err = device_property_read_u32(mmc_dev(host->mmc), 683 "nvidia,pad-autocal-pull-down-offset-1v8-timeout", 684 &autocal->pull_down_1v8_timeout); 685 if (err) { 686 if (!IS_ERR(tegra_host->pinctrl_state_1v8) && 687 (tegra_host->pinctrl_state_1v8_drv == NULL)) 688 pr_warn("%s: Missing autocal timeout 1v8-pad drvs\n", 689 mmc_hostname(host->mmc)); 690 autocal->pull_down_1v8_timeout = 0; 691 } 692 } 693 694 static void tegra_sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq) 695 { 696 struct sdhci_host *host = mmc_priv(mmc); 697 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 698 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 699 ktime_t since_calib = ktime_sub(ktime_get(), tegra_host->last_calib); 700 701 /* 100 ms calibration interval is specified in the TRM */ 702 if (ktime_to_ms(since_calib) > 100) { 703 tegra_sdhci_pad_autocalib(host); 704 tegra_host->last_calib = ktime_get(); 705 } 706 707 sdhci_request(mmc, mrq); 708 } 709 710 static void tegra_sdhci_parse_tap_and_trim(struct sdhci_host *host) 711 { 712 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 713 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 714 int err; 715 716 err = device_property_read_u32(mmc_dev(host->mmc), "nvidia,default-tap", 717 &tegra_host->default_tap); 718 if (err) 719 tegra_host->default_tap = 0; 720 721 err = device_property_read_u32(mmc_dev(host->mmc), "nvidia,default-trim", 722 &tegra_host->default_trim); 723 if (err) 724 tegra_host->default_trim = 0; 725 726 err = device_property_read_u32(mmc_dev(host->mmc), "nvidia,dqs-trim", 727 &tegra_host->dqs_trim); 728 if (err) 729 tegra_host->dqs_trim = 0x11; 730 } 731 732 static void tegra_sdhci_parse_dt(struct sdhci_host *host) 733 { 734 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 735 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 736 737 if (device_property_read_bool(mmc_dev(host->mmc), "supports-cqe")) 738 tegra_host->enable_hwcq = true; 739 else 740 tegra_host->enable_hwcq = false; 741 742 tegra_sdhci_parse_pad_autocal_dt(host); 743 tegra_sdhci_parse_tap_and_trim(host); 744 } 745 746 static void tegra_sdhci_set_clock(struct sdhci_host *host, unsigned int clock) 747 { 748 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 749 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 750 struct device *dev = mmc_dev(host->mmc); 751 unsigned long host_clk; 752 int err; 753 754 if (!clock) 755 return sdhci_set_clock(host, clock); 756 757 /* 758 * In DDR50/52 modes the Tegra SDHCI controllers require the SDHCI 759 * divider to be configured to divided the host clock by two. The SDHCI 760 * clock divider is calculated as part of sdhci_set_clock() by 761 * sdhci_calc_clk(). The divider is calculated from host->max_clk and 762 * the requested clock rate. 763 * 764 * By setting the host->max_clk to clock * 2 the divider calculation 765 * will always result in the correct value for DDR50/52 modes, 766 * regardless of clock rate rounding, which may happen if the value 767 * from clk_get_rate() is used. 768 */ 769 host_clk = tegra_host->ddr_signaling ? clock * 2 : clock; 770 771 err = dev_pm_opp_set_rate(dev, host_clk); 772 if (err) 773 dev_err(dev, "failed to set clk rate to %luHz: %d\n", 774 host_clk, err); 775 776 tegra_host->curr_clk_rate = clk_get_rate(pltfm_host->clk); 777 if (tegra_host->ddr_signaling) 778 host->max_clk = host_clk; 779 else 780 host->max_clk = clk_get_rate(pltfm_host->clk); 781 782 sdhci_set_clock(host, clock); 783 784 if (tegra_host->pad_calib_required) { 785 tegra_sdhci_pad_autocalib(host); 786 tegra_host->pad_calib_required = false; 787 } 788 } 789 790 static void tegra_sdhci_hs400_enhanced_strobe(struct mmc_host *mmc, 791 struct mmc_ios *ios) 792 { 793 struct sdhci_host *host = mmc_priv(mmc); 794 u32 val; 795 796 val = sdhci_readl(host, SDHCI_TEGRA_VENDOR_SYS_SW_CTRL); 797 798 if (ios->enhanced_strobe) { 799 val |= SDHCI_TEGRA_SYS_SW_CTRL_ENHANCED_STROBE; 800 /* 801 * When CMD13 is sent from mmc_select_hs400es() after 802 * switching to HS400ES mode, the bus is operating at 803 * either MMC_HIGH_26_MAX_DTR or MMC_HIGH_52_MAX_DTR. 804 * To meet Tegra SDHCI requirement at HS400ES mode, force SDHCI 805 * interface clock to MMC_HS200_MAX_DTR (200 MHz) so that host 806 * controller CAR clock and the interface clock are rate matched. 807 */ 808 tegra_sdhci_set_clock(host, MMC_HS200_MAX_DTR); 809 } else { 810 val &= ~SDHCI_TEGRA_SYS_SW_CTRL_ENHANCED_STROBE; 811 } 812 813 sdhci_writel(host, val, SDHCI_TEGRA_VENDOR_SYS_SW_CTRL); 814 } 815 816 static unsigned int tegra_sdhci_get_max_clock(struct sdhci_host *host) 817 { 818 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 819 820 return clk_round_rate(pltfm_host->clk, UINT_MAX); 821 } 822 823 static void tegra_sdhci_set_dqs_trim(struct sdhci_host *host, u8 trim) 824 { 825 u32 val; 826 827 val = sdhci_readl(host, SDHCI_TEGRA_VENDOR_CAP_OVERRIDES); 828 val &= ~SDHCI_TEGRA_CAP_OVERRIDES_DQS_TRIM_MASK; 829 val |= trim << SDHCI_TEGRA_CAP_OVERRIDES_DQS_TRIM_SHIFT; 830 sdhci_writel(host, val, SDHCI_TEGRA_VENDOR_CAP_OVERRIDES); 831 } 832 833 static void tegra_sdhci_hs400_dll_cal(struct sdhci_host *host) 834 { 835 u32 reg; 836 int err; 837 838 reg = sdhci_readl(host, SDHCI_TEGRA_VENDOR_DLLCAL_CFG); 839 reg |= SDHCI_TEGRA_DLLCAL_CALIBRATE; 840 sdhci_writel(host, reg, SDHCI_TEGRA_VENDOR_DLLCAL_CFG); 841 842 /* 1 ms sleep, 5 ms timeout */ 843 err = readl_poll_timeout(host->ioaddr + SDHCI_TEGRA_VENDOR_DLLCAL_STA, 844 reg, !(reg & SDHCI_TEGRA_DLLCAL_STA_ACTIVE), 845 1000, 5000); 846 if (err) 847 dev_err(mmc_dev(host->mmc), 848 "HS400 delay line calibration timed out\n"); 849 } 850 851 static void tegra_sdhci_tap_correction(struct sdhci_host *host, u8 thd_up, 852 u8 thd_low, u8 fixed_tap) 853 { 854 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 855 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 856 u32 val, tun_status; 857 u8 word, bit, edge1, tap, window; 858 bool tap_result; 859 bool start_fail = false; 860 bool start_pass = false; 861 bool end_pass = false; 862 bool first_fail = false; 863 bool first_pass = false; 864 u8 start_pass_tap = 0; 865 u8 end_pass_tap = 0; 866 u8 first_fail_tap = 0; 867 u8 first_pass_tap = 0; 868 u8 total_tuning_words = host->tuning_loop_count / TUNING_WORD_BIT_SIZE; 869 870 /* 871 * Read auto-tuned results and extract good valid passing window by 872 * filtering out un-wanted bubble/partial/merged windows. 873 */ 874 for (word = 0; word < total_tuning_words; word++) { 875 val = sdhci_readl(host, SDHCI_VNDR_TUN_CTRL0_0); 876 val &= ~SDHCI_VNDR_TUN_CTRL0_TUN_WORD_SEL_MASK; 877 val |= word; 878 sdhci_writel(host, val, SDHCI_VNDR_TUN_CTRL0_0); 879 tun_status = sdhci_readl(host, SDHCI_TEGRA_VNDR_TUN_STATUS0); 880 bit = 0; 881 while (bit < TUNING_WORD_BIT_SIZE) { 882 tap = word * TUNING_WORD_BIT_SIZE + bit; 883 tap_result = tun_status & (1 << bit); 884 if (!tap_result && !start_fail) { 885 start_fail = true; 886 if (!first_fail) { 887 first_fail_tap = tap; 888 first_fail = true; 889 } 890 891 } else if (tap_result && start_fail && !start_pass) { 892 start_pass_tap = tap; 893 start_pass = true; 894 if (!first_pass) { 895 first_pass_tap = tap; 896 first_pass = true; 897 } 898 899 } else if (!tap_result && start_fail && start_pass && 900 !end_pass) { 901 end_pass_tap = tap - 1; 902 end_pass = true; 903 } else if (tap_result && start_pass && start_fail && 904 end_pass) { 905 window = end_pass_tap - start_pass_tap; 906 /* discard merged window and bubble window */ 907 if (window >= thd_up || window < thd_low) { 908 start_pass_tap = tap; 909 end_pass = false; 910 } else { 911 /* set tap at middle of valid window */ 912 tap = start_pass_tap + window / 2; 913 tegra_host->tuned_tap_delay = tap; 914 return; 915 } 916 } 917 918 bit++; 919 } 920 } 921 922 if (!first_fail) { 923 WARN(1, "no edge detected, continue with hw tuned delay.\n"); 924 } else if (first_pass) { 925 /* set tap location at fixed tap relative to the first edge */ 926 edge1 = first_fail_tap + (first_pass_tap - first_fail_tap) / 2; 927 if (edge1 - 1 > fixed_tap) 928 tegra_host->tuned_tap_delay = edge1 - fixed_tap; 929 else 930 tegra_host->tuned_tap_delay = edge1 + fixed_tap; 931 } 932 } 933 934 static void tegra_sdhci_post_tuning(struct sdhci_host *host) 935 { 936 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 937 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 938 const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data; 939 u32 avg_tap_dly, val, min_tap_dly, max_tap_dly; 940 u8 fixed_tap, start_tap, end_tap, window_width; 941 u8 thdupper, thdlower; 942 u8 num_iter; 943 u32 clk_rate_mhz, period_ps, bestcase, worstcase; 944 945 /* retain HW tuned tap to use incase if no correction is needed */ 946 val = sdhci_readl(host, SDHCI_TEGRA_VENDOR_CLOCK_CTRL); 947 tegra_host->tuned_tap_delay = (val & SDHCI_CLOCK_CTRL_TAP_MASK) >> 948 SDHCI_CLOCK_CTRL_TAP_SHIFT; 949 if (soc_data->min_tap_delay && soc_data->max_tap_delay) { 950 min_tap_dly = soc_data->min_tap_delay; 951 max_tap_dly = soc_data->max_tap_delay; 952 clk_rate_mhz = tegra_host->curr_clk_rate / USEC_PER_SEC; 953 period_ps = USEC_PER_SEC / clk_rate_mhz; 954 bestcase = period_ps / min_tap_dly; 955 worstcase = period_ps / max_tap_dly; 956 /* 957 * Upper and Lower bound thresholds used to detect merged and 958 * bubble windows 959 */ 960 thdupper = (2 * worstcase + bestcase) / 2; 961 thdlower = worstcase / 4; 962 /* 963 * fixed tap is used when HW tuning result contains single edge 964 * and tap is set at fixed tap delay relative to the first edge 965 */ 966 avg_tap_dly = (period_ps * 2) / (min_tap_dly + max_tap_dly); 967 fixed_tap = avg_tap_dly / 2; 968 969 val = sdhci_readl(host, SDHCI_TEGRA_VNDR_TUN_STATUS1); 970 start_tap = val & SDHCI_TEGRA_VNDR_TUN_STATUS1_TAP_MASK; 971 end_tap = (val >> SDHCI_TEGRA_VNDR_TUN_STATUS1_END_TAP_SHIFT) & 972 SDHCI_TEGRA_VNDR_TUN_STATUS1_TAP_MASK; 973 window_width = end_tap - start_tap; 974 num_iter = host->tuning_loop_count; 975 /* 976 * partial window includes edges of the tuning range. 977 * merged window includes more taps so window width is higher 978 * than upper threshold. 979 */ 980 if (start_tap == 0 || (end_tap == (num_iter - 1)) || 981 (end_tap == num_iter - 2) || window_width >= thdupper) { 982 pr_debug("%s: Apply tuning correction\n", 983 mmc_hostname(host->mmc)); 984 tegra_sdhci_tap_correction(host, thdupper, thdlower, 985 fixed_tap); 986 } 987 } 988 989 tegra_sdhci_set_tap(host, tegra_host->tuned_tap_delay); 990 } 991 992 static int tegra_sdhci_execute_hw_tuning(struct mmc_host *mmc, u32 opcode) 993 { 994 struct sdhci_host *host = mmc_priv(mmc); 995 int err; 996 997 err = sdhci_execute_tuning(mmc, opcode); 998 if (!err && !host->tuning_err) 999 tegra_sdhci_post_tuning(host); 1000 1001 return err; 1002 } 1003 1004 static void tegra_sdhci_set_uhs_signaling(struct sdhci_host *host, 1005 unsigned timing) 1006 { 1007 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 1008 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 1009 bool set_default_tap = false; 1010 bool set_dqs_trim = false; 1011 bool do_hs400_dll_cal = false; 1012 u8 iter = TRIES_256; 1013 u32 val; 1014 1015 tegra_host->ddr_signaling = false; 1016 switch (timing) { 1017 case MMC_TIMING_UHS_SDR50: 1018 break; 1019 case MMC_TIMING_UHS_SDR104: 1020 case MMC_TIMING_MMC_HS200: 1021 /* Don't set default tap on tunable modes. */ 1022 iter = TRIES_128; 1023 break; 1024 case MMC_TIMING_MMC_HS400: 1025 set_dqs_trim = true; 1026 do_hs400_dll_cal = true; 1027 iter = TRIES_128; 1028 break; 1029 case MMC_TIMING_MMC_DDR52: 1030 case MMC_TIMING_UHS_DDR50: 1031 tegra_host->ddr_signaling = true; 1032 set_default_tap = true; 1033 break; 1034 default: 1035 set_default_tap = true; 1036 break; 1037 } 1038 1039 val = sdhci_readl(host, SDHCI_VNDR_TUN_CTRL0_0); 1040 val &= ~(SDHCI_VNDR_TUN_CTRL0_TUN_ITER_MASK | 1041 SDHCI_VNDR_TUN_CTRL0_START_TAP_VAL_MASK | 1042 SDHCI_VNDR_TUN_CTRL0_MUL_M_MASK); 1043 val |= (iter << SDHCI_VNDR_TUN_CTRL0_TUN_ITER_SHIFT | 1044 0 << SDHCI_VNDR_TUN_CTRL0_START_TAP_VAL_SHIFT | 1045 1 << SDHCI_VNDR_TUN_CTRL0_MUL_M_SHIFT); 1046 sdhci_writel(host, val, SDHCI_VNDR_TUN_CTRL0_0); 1047 sdhci_writel(host, 0, SDHCI_TEGRA_VNDR_TUN_CTRL1_0); 1048 1049 host->tuning_loop_count = (iter == TRIES_128) ? 128 : 256; 1050 1051 sdhci_set_uhs_signaling(host, timing); 1052 1053 tegra_sdhci_pad_autocalib(host); 1054 1055 if (tegra_host->tuned_tap_delay && !set_default_tap) 1056 tegra_sdhci_set_tap(host, tegra_host->tuned_tap_delay); 1057 else 1058 tegra_sdhci_set_tap(host, tegra_host->default_tap); 1059 1060 if (set_dqs_trim) 1061 tegra_sdhci_set_dqs_trim(host, tegra_host->dqs_trim); 1062 1063 if (do_hs400_dll_cal) 1064 tegra_sdhci_hs400_dll_cal(host); 1065 } 1066 1067 static int tegra_sdhci_execute_tuning(struct sdhci_host *host, u32 opcode) 1068 { 1069 unsigned int min, max; 1070 1071 /* 1072 * Start search for minimum tap value at 10, as smaller values are 1073 * may wrongly be reported as working but fail at higher speeds, 1074 * according to the TRM. 1075 */ 1076 min = 10; 1077 while (min < 255) { 1078 tegra_sdhci_set_tap(host, min); 1079 if (!mmc_send_tuning(host->mmc, opcode, NULL)) 1080 break; 1081 min++; 1082 } 1083 1084 /* Find the maximum tap value that still passes. */ 1085 max = min + 1; 1086 while (max < 255) { 1087 tegra_sdhci_set_tap(host, max); 1088 if (mmc_send_tuning(host->mmc, opcode, NULL)) { 1089 max--; 1090 break; 1091 } 1092 max++; 1093 } 1094 1095 /* The TRM states the ideal tap value is at 75% in the passing range. */ 1096 tegra_sdhci_set_tap(host, min + ((max - min) * 3 / 4)); 1097 1098 return mmc_send_tuning(host->mmc, opcode, NULL); 1099 } 1100 1101 static int sdhci_tegra_start_signal_voltage_switch(struct mmc_host *mmc, 1102 struct mmc_ios *ios) 1103 { 1104 struct sdhci_host *host = mmc_priv(mmc); 1105 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 1106 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 1107 int ret = 0; 1108 1109 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 1110 ret = tegra_sdhci_set_padctrl(host, ios->signal_voltage, true); 1111 if (ret < 0) 1112 return ret; 1113 ret = sdhci_start_signal_voltage_switch(mmc, ios); 1114 } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { 1115 ret = sdhci_start_signal_voltage_switch(mmc, ios); 1116 if (ret < 0) 1117 return ret; 1118 ret = tegra_sdhci_set_padctrl(host, ios->signal_voltage, true); 1119 } 1120 1121 if (tegra_host->pad_calib_required) 1122 tegra_sdhci_pad_autocalib(host); 1123 1124 return ret; 1125 } 1126 1127 static int tegra_sdhci_init_pinctrl_info(struct device *dev, 1128 struct sdhci_tegra *tegra_host) 1129 { 1130 tegra_host->pinctrl_sdmmc = devm_pinctrl_get(dev); 1131 if (IS_ERR(tegra_host->pinctrl_sdmmc)) { 1132 dev_dbg(dev, "No pinctrl info, err: %ld\n", 1133 PTR_ERR(tegra_host->pinctrl_sdmmc)); 1134 return -1; 1135 } 1136 1137 tegra_host->pinctrl_state_1v8_drv = pinctrl_lookup_state( 1138 tegra_host->pinctrl_sdmmc, "sdmmc-1v8-drv"); 1139 if (IS_ERR(tegra_host->pinctrl_state_1v8_drv)) { 1140 if (PTR_ERR(tegra_host->pinctrl_state_1v8_drv) == -ENODEV) 1141 tegra_host->pinctrl_state_1v8_drv = NULL; 1142 } 1143 1144 tegra_host->pinctrl_state_3v3_drv = pinctrl_lookup_state( 1145 tegra_host->pinctrl_sdmmc, "sdmmc-3v3-drv"); 1146 if (IS_ERR(tegra_host->pinctrl_state_3v3_drv)) { 1147 if (PTR_ERR(tegra_host->pinctrl_state_3v3_drv) == -ENODEV) 1148 tegra_host->pinctrl_state_3v3_drv = NULL; 1149 } 1150 1151 tegra_host->pinctrl_state_3v3 = 1152 pinctrl_lookup_state(tegra_host->pinctrl_sdmmc, "sdmmc-3v3"); 1153 if (IS_ERR(tegra_host->pinctrl_state_3v3)) { 1154 dev_warn(dev, "Missing 3.3V pad state, err: %ld\n", 1155 PTR_ERR(tegra_host->pinctrl_state_3v3)); 1156 return -1; 1157 } 1158 1159 tegra_host->pinctrl_state_1v8 = 1160 pinctrl_lookup_state(tegra_host->pinctrl_sdmmc, "sdmmc-1v8"); 1161 if (IS_ERR(tegra_host->pinctrl_state_1v8)) { 1162 dev_warn(dev, "Missing 1.8V pad state, err: %ld\n", 1163 PTR_ERR(tegra_host->pinctrl_state_1v8)); 1164 return -1; 1165 } 1166 1167 tegra_host->pad_control_available = true; 1168 1169 return 0; 1170 } 1171 1172 static void tegra_sdhci_voltage_switch(struct sdhci_host *host) 1173 { 1174 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 1175 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 1176 const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data; 1177 1178 if (soc_data->nvquirks & NVQUIRK_HAS_PADCALIB) 1179 tegra_host->pad_calib_required = true; 1180 } 1181 1182 static void tegra_cqhci_writel(struct cqhci_host *cq_host, u32 val, int reg) 1183 { 1184 struct mmc_host *mmc = cq_host->mmc; 1185 struct sdhci_host *host = mmc_priv(mmc); 1186 u8 ctrl; 1187 ktime_t timeout; 1188 bool timed_out; 1189 1190 /* 1191 * During CQE resume/unhalt, CQHCI driver unhalts CQE prior to 1192 * cqhci_host_ops enable where SDHCI DMA and BLOCK_SIZE registers need 1193 * to be re-configured. 1194 * Tegra CQHCI/SDHCI prevents write access to block size register when 1195 * CQE is unhalted. So handling CQE resume sequence here to configure 1196 * SDHCI block registers prior to exiting CQE halt state. 1197 */ 1198 if (reg == CQHCI_CTL && !(val & CQHCI_HALT) && 1199 cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_HALT) { 1200 sdhci_writew(host, SDHCI_TEGRA_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE); 1201 sdhci_cqe_enable(mmc); 1202 writel(val, cq_host->mmio + reg); 1203 timeout = ktime_add_us(ktime_get(), 50); 1204 while (1) { 1205 timed_out = ktime_compare(ktime_get(), timeout) > 0; 1206 ctrl = cqhci_readl(cq_host, CQHCI_CTL); 1207 if (!(ctrl & CQHCI_HALT) || timed_out) 1208 break; 1209 } 1210 /* 1211 * CQE usually resumes very quick, but incase if Tegra CQE 1212 * doesn't resume retry unhalt. 1213 */ 1214 if (timed_out) 1215 writel(val, cq_host->mmio + reg); 1216 } else { 1217 writel(val, cq_host->mmio + reg); 1218 } 1219 } 1220 1221 static void sdhci_tegra_update_dcmd_desc(struct mmc_host *mmc, 1222 struct mmc_request *mrq, u64 *data) 1223 { 1224 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(mmc_priv(mmc)); 1225 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 1226 const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data; 1227 1228 if (soc_data->nvquirks & NVQUIRK_CQHCI_DCMD_R1B_CMD_TIMING && 1229 mrq->cmd->flags & MMC_RSP_R1B) 1230 *data |= CQHCI_CMD_TIMING(1); 1231 } 1232 1233 static void sdhci_tegra_cqe_enable(struct mmc_host *mmc) 1234 { 1235 struct cqhci_host *cq_host = mmc->cqe_private; 1236 struct sdhci_host *host = mmc_priv(mmc); 1237 u32 val; 1238 1239 /* 1240 * Tegra CQHCI/SDMMC design prevents write access to sdhci block size 1241 * register when CQE is enabled and unhalted. 1242 * CQHCI driver enables CQE prior to activation, so disable CQE before 1243 * programming block size in sdhci controller and enable it back. 1244 */ 1245 if (!cq_host->activated) { 1246 val = cqhci_readl(cq_host, CQHCI_CFG); 1247 if (val & CQHCI_ENABLE) 1248 cqhci_writel(cq_host, (val & ~CQHCI_ENABLE), 1249 CQHCI_CFG); 1250 sdhci_writew(host, SDHCI_TEGRA_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE); 1251 sdhci_cqe_enable(mmc); 1252 if (val & CQHCI_ENABLE) 1253 cqhci_writel(cq_host, val, CQHCI_CFG); 1254 } 1255 1256 /* 1257 * CMD CRC errors are seen sometimes with some eMMC devices when status 1258 * command is sent during transfer of last data block which is the 1259 * default case as send status command block counter (CBC) is 1. 1260 * Recommended fix to set CBC to 0 allowing send status command only 1261 * when data lines are idle. 1262 */ 1263 val = cqhci_readl(cq_host, CQHCI_SSC1); 1264 val &= ~CQHCI_SSC1_CBC_MASK; 1265 cqhci_writel(cq_host, val, CQHCI_SSC1); 1266 } 1267 1268 static void sdhci_tegra_dumpregs(struct mmc_host *mmc) 1269 { 1270 sdhci_dumpregs(mmc_priv(mmc)); 1271 } 1272 1273 static u32 sdhci_tegra_cqhci_irq(struct sdhci_host *host, u32 intmask) 1274 { 1275 int cmd_error = 0; 1276 int data_error = 0; 1277 1278 if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error)) 1279 return intmask; 1280 1281 cqhci_irq(host->mmc, intmask, cmd_error, data_error); 1282 1283 return 0; 1284 } 1285 1286 static void tegra_sdhci_set_timeout(struct sdhci_host *host, 1287 struct mmc_command *cmd) 1288 { 1289 u32 val; 1290 1291 /* 1292 * HW busy detection timeout is based on programmed data timeout 1293 * counter and maximum supported timeout is 11s which may not be 1294 * enough for long operations like cache flush, sleep awake, erase. 1295 * 1296 * ERASE_TIMEOUT_LIMIT bit of VENDOR_MISC_CTRL register allows 1297 * host controller to wait for busy state until the card is busy 1298 * without HW timeout. 1299 * 1300 * So, use infinite busy wait mode for operations that may take 1301 * more than maximum HW busy timeout of 11s otherwise use finite 1302 * busy wait mode. 1303 */ 1304 val = sdhci_readl(host, SDHCI_TEGRA_VENDOR_MISC_CTRL); 1305 if (cmd && cmd->busy_timeout >= 11 * MSEC_PER_SEC) 1306 val |= SDHCI_MISC_CTRL_ERASE_TIMEOUT_LIMIT; 1307 else 1308 val &= ~SDHCI_MISC_CTRL_ERASE_TIMEOUT_LIMIT; 1309 sdhci_writel(host, val, SDHCI_TEGRA_VENDOR_MISC_CTRL); 1310 1311 __sdhci_set_timeout(host, cmd); 1312 } 1313 1314 static void sdhci_tegra_cqe_pre_enable(struct mmc_host *mmc) 1315 { 1316 struct cqhci_host *cq_host = mmc->cqe_private; 1317 u32 reg; 1318 1319 reg = cqhci_readl(cq_host, CQHCI_CFG); 1320 reg |= CQHCI_ENABLE; 1321 cqhci_writel(cq_host, reg, CQHCI_CFG); 1322 } 1323 1324 static void sdhci_tegra_cqe_post_disable(struct mmc_host *mmc) 1325 { 1326 struct cqhci_host *cq_host = mmc->cqe_private; 1327 struct sdhci_host *host = mmc_priv(mmc); 1328 u32 reg; 1329 1330 reg = cqhci_readl(cq_host, CQHCI_CFG); 1331 reg &= ~CQHCI_ENABLE; 1332 cqhci_writel(cq_host, reg, CQHCI_CFG); 1333 sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE); 1334 } 1335 1336 static const struct cqhci_host_ops sdhci_tegra_cqhci_ops = { 1337 .write_l = tegra_cqhci_writel, 1338 .enable = sdhci_tegra_cqe_enable, 1339 .disable = sdhci_cqe_disable, 1340 .dumpregs = sdhci_tegra_dumpregs, 1341 .update_dcmd_desc = sdhci_tegra_update_dcmd_desc, 1342 .pre_enable = sdhci_tegra_cqe_pre_enable, 1343 .post_disable = sdhci_tegra_cqe_post_disable, 1344 }; 1345 1346 static int tegra_sdhci_set_dma_mask(struct sdhci_host *host) 1347 { 1348 struct sdhci_pltfm_host *platform = sdhci_priv(host); 1349 struct sdhci_tegra *tegra = sdhci_pltfm_priv(platform); 1350 const struct sdhci_tegra_soc_data *soc = tegra->soc_data; 1351 struct device *dev = mmc_dev(host->mmc); 1352 1353 if (soc->dma_mask) 1354 return dma_set_mask_and_coherent(dev, soc->dma_mask); 1355 1356 return 0; 1357 } 1358 1359 static const struct sdhci_ops tegra_sdhci_ops = { 1360 .get_ro = tegra_sdhci_get_ro, 1361 .read_w = tegra_sdhci_readw, 1362 .write_l = tegra_sdhci_writel, 1363 .set_clock = tegra_sdhci_set_clock, 1364 .set_dma_mask = tegra_sdhci_set_dma_mask, 1365 .set_bus_width = sdhci_set_bus_width, 1366 .reset = tegra_sdhci_reset, 1367 .platform_execute_tuning = tegra_sdhci_execute_tuning, 1368 .set_uhs_signaling = tegra_sdhci_set_uhs_signaling, 1369 .voltage_switch = tegra_sdhci_voltage_switch, 1370 .get_max_clock = tegra_sdhci_get_max_clock, 1371 }; 1372 1373 static const struct sdhci_pltfm_data sdhci_tegra20_pdata = { 1374 .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | 1375 SDHCI_QUIRK_SINGLE_POWER_WRITE | 1376 SDHCI_QUIRK_NO_HISPD_BIT | 1377 SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC | 1378 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, 1379 .ops = &tegra_sdhci_ops, 1380 }; 1381 1382 static const struct sdhci_tegra_soc_data soc_data_tegra20 = { 1383 .pdata = &sdhci_tegra20_pdata, 1384 .dma_mask = DMA_BIT_MASK(32), 1385 .nvquirks = NVQUIRK_FORCE_SDHCI_SPEC_200 | 1386 NVQUIRK_HAS_ANDROID_GPT_SECTOR | 1387 NVQUIRK_ENABLE_BLOCK_GAP_DET, 1388 }; 1389 1390 static const struct sdhci_pltfm_data sdhci_tegra30_pdata = { 1391 .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | 1392 SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 1393 SDHCI_QUIRK_SINGLE_POWER_WRITE | 1394 SDHCI_QUIRK_NO_HISPD_BIT | 1395 SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC | 1396 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, 1397 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | 1398 SDHCI_QUIRK2_BROKEN_HS200 | 1399 /* 1400 * Auto-CMD23 leads to "Got command interrupt 0x00010000 even 1401 * though no command operation was in progress." 1402 * 1403 * The exact reason is unknown, as the same hardware seems 1404 * to support Auto CMD23 on a downstream 3.1 kernel. 1405 */ 1406 SDHCI_QUIRK2_ACMD23_BROKEN, 1407 .ops = &tegra_sdhci_ops, 1408 }; 1409 1410 static const struct sdhci_tegra_soc_data soc_data_tegra30 = { 1411 .pdata = &sdhci_tegra30_pdata, 1412 .dma_mask = DMA_BIT_MASK(32), 1413 .nvquirks = NVQUIRK_ENABLE_SDHCI_SPEC_300 | 1414 NVQUIRK_ENABLE_SDR50 | 1415 NVQUIRK_ENABLE_SDR104 | 1416 NVQUIRK_HAS_ANDROID_GPT_SECTOR | 1417 NVQUIRK_HAS_PADCALIB, 1418 }; 1419 1420 static const struct sdhci_ops tegra114_sdhci_ops = { 1421 .get_ro = tegra_sdhci_get_ro, 1422 .read_w = tegra_sdhci_readw, 1423 .write_w = tegra_sdhci_writew, 1424 .write_l = tegra_sdhci_writel, 1425 .set_clock = tegra_sdhci_set_clock, 1426 .set_dma_mask = tegra_sdhci_set_dma_mask, 1427 .set_bus_width = sdhci_set_bus_width, 1428 .reset = tegra_sdhci_reset, 1429 .platform_execute_tuning = tegra_sdhci_execute_tuning, 1430 .set_uhs_signaling = tegra_sdhci_set_uhs_signaling, 1431 .voltage_switch = tegra_sdhci_voltage_switch, 1432 .get_max_clock = tegra_sdhci_get_max_clock, 1433 }; 1434 1435 static const struct sdhci_pltfm_data sdhci_tegra114_pdata = { 1436 .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | 1437 SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 1438 SDHCI_QUIRK_SINGLE_POWER_WRITE | 1439 SDHCI_QUIRK_NO_HISPD_BIT | 1440 SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC | 1441 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, 1442 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, 1443 .ops = &tegra114_sdhci_ops, 1444 }; 1445 1446 static const struct sdhci_tegra_soc_data soc_data_tegra114 = { 1447 .pdata = &sdhci_tegra114_pdata, 1448 .dma_mask = DMA_BIT_MASK(32), 1449 .nvquirks = NVQUIRK_HAS_ANDROID_GPT_SECTOR, 1450 }; 1451 1452 static const struct sdhci_pltfm_data sdhci_tegra124_pdata = { 1453 .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | 1454 SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 1455 SDHCI_QUIRK_SINGLE_POWER_WRITE | 1456 SDHCI_QUIRK_NO_HISPD_BIT | 1457 SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC | 1458 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, 1459 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, 1460 .ops = &tegra114_sdhci_ops, 1461 }; 1462 1463 static const struct sdhci_tegra_soc_data soc_data_tegra124 = { 1464 .pdata = &sdhci_tegra124_pdata, 1465 .dma_mask = DMA_BIT_MASK(34), 1466 .nvquirks = NVQUIRK_HAS_ANDROID_GPT_SECTOR, 1467 }; 1468 1469 static const struct sdhci_ops tegra210_sdhci_ops = { 1470 .get_ro = tegra_sdhci_get_ro, 1471 .read_w = tegra_sdhci_readw, 1472 .write_w = tegra210_sdhci_writew, 1473 .write_l = tegra_sdhci_writel, 1474 .set_clock = tegra_sdhci_set_clock, 1475 .set_dma_mask = tegra_sdhci_set_dma_mask, 1476 .set_bus_width = sdhci_set_bus_width, 1477 .reset = tegra_sdhci_reset, 1478 .set_uhs_signaling = tegra_sdhci_set_uhs_signaling, 1479 .voltage_switch = tegra_sdhci_voltage_switch, 1480 .get_max_clock = tegra_sdhci_get_max_clock, 1481 .set_timeout = tegra_sdhci_set_timeout, 1482 }; 1483 1484 static const struct sdhci_pltfm_data sdhci_tegra210_pdata = { 1485 .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | 1486 SDHCI_QUIRK_SINGLE_POWER_WRITE | 1487 SDHCI_QUIRK_NO_HISPD_BIT | 1488 SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC | 1489 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, 1490 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, 1491 .ops = &tegra210_sdhci_ops, 1492 }; 1493 1494 static const struct sdhci_tegra_soc_data soc_data_tegra210 = { 1495 .pdata = &sdhci_tegra210_pdata, 1496 .dma_mask = DMA_BIT_MASK(34), 1497 .nvquirks = NVQUIRK_NEEDS_PAD_CONTROL | 1498 NVQUIRK_HAS_PADCALIB | 1499 NVQUIRK_DIS_CARD_CLK_CONFIG_TAP | 1500 NVQUIRK_ENABLE_SDR50 | 1501 NVQUIRK_ENABLE_SDR104 | 1502 NVQUIRK_HAS_TMCLK, 1503 .min_tap_delay = 106, 1504 .max_tap_delay = 185, 1505 }; 1506 1507 static const struct sdhci_ops tegra186_sdhci_ops = { 1508 .get_ro = tegra_sdhci_get_ro, 1509 .read_w = tegra_sdhci_readw, 1510 .write_l = tegra_sdhci_writel, 1511 .set_clock = tegra_sdhci_set_clock, 1512 .set_dma_mask = tegra_sdhci_set_dma_mask, 1513 .set_bus_width = sdhci_set_bus_width, 1514 .reset = tegra_sdhci_reset, 1515 .set_uhs_signaling = tegra_sdhci_set_uhs_signaling, 1516 .voltage_switch = tegra_sdhci_voltage_switch, 1517 .get_max_clock = tegra_sdhci_get_max_clock, 1518 .irq = sdhci_tegra_cqhci_irq, 1519 .set_timeout = tegra_sdhci_set_timeout, 1520 }; 1521 1522 static const struct sdhci_pltfm_data sdhci_tegra186_pdata = { 1523 .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | 1524 SDHCI_QUIRK_SINGLE_POWER_WRITE | 1525 SDHCI_QUIRK_NO_HISPD_BIT | 1526 SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC | 1527 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, 1528 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, 1529 .ops = &tegra186_sdhci_ops, 1530 }; 1531 1532 static const struct sdhci_tegra_soc_data soc_data_tegra186 = { 1533 .pdata = &sdhci_tegra186_pdata, 1534 .dma_mask = DMA_BIT_MASK(40), 1535 .nvquirks = NVQUIRK_NEEDS_PAD_CONTROL | 1536 NVQUIRK_HAS_PADCALIB | 1537 NVQUIRK_DIS_CARD_CLK_CONFIG_TAP | 1538 NVQUIRK_ENABLE_SDR50 | 1539 NVQUIRK_ENABLE_SDR104 | 1540 NVQUIRK_HAS_TMCLK | 1541 NVQUIRK_CQHCI_DCMD_R1B_CMD_TIMING, 1542 .min_tap_delay = 84, 1543 .max_tap_delay = 136, 1544 }; 1545 1546 static const struct sdhci_tegra_soc_data soc_data_tegra194 = { 1547 .pdata = &sdhci_tegra186_pdata, 1548 .dma_mask = DMA_BIT_MASK(39), 1549 .nvquirks = NVQUIRK_NEEDS_PAD_CONTROL | 1550 NVQUIRK_HAS_PADCALIB | 1551 NVQUIRK_DIS_CARD_CLK_CONFIG_TAP | 1552 NVQUIRK_ENABLE_SDR50 | 1553 NVQUIRK_ENABLE_SDR104 | 1554 NVQUIRK_HAS_TMCLK, 1555 .min_tap_delay = 96, 1556 .max_tap_delay = 139, 1557 }; 1558 1559 static const struct of_device_id sdhci_tegra_dt_match[] = { 1560 { .compatible = "nvidia,tegra194-sdhci", .data = &soc_data_tegra194 }, 1561 { .compatible = "nvidia,tegra186-sdhci", .data = &soc_data_tegra186 }, 1562 { .compatible = "nvidia,tegra210-sdhci", .data = &soc_data_tegra210 }, 1563 { .compatible = "nvidia,tegra124-sdhci", .data = &soc_data_tegra124 }, 1564 { .compatible = "nvidia,tegra114-sdhci", .data = &soc_data_tegra114 }, 1565 { .compatible = "nvidia,tegra30-sdhci", .data = &soc_data_tegra30 }, 1566 { .compatible = "nvidia,tegra20-sdhci", .data = &soc_data_tegra20 }, 1567 {} 1568 }; 1569 MODULE_DEVICE_TABLE(of, sdhci_tegra_dt_match); 1570 1571 static int sdhci_tegra_add_host(struct sdhci_host *host) 1572 { 1573 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 1574 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 1575 struct cqhci_host *cq_host; 1576 bool dma64; 1577 int ret; 1578 1579 if (!tegra_host->enable_hwcq) 1580 return sdhci_add_host(host); 1581 1582 sdhci_enable_v4_mode(host); 1583 1584 ret = sdhci_setup_host(host); 1585 if (ret) 1586 return ret; 1587 1588 host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD; 1589 1590 cq_host = devm_kzalloc(mmc_dev(host->mmc), 1591 sizeof(*cq_host), GFP_KERNEL); 1592 if (!cq_host) { 1593 ret = -ENOMEM; 1594 goto cleanup; 1595 } 1596 1597 cq_host->mmio = host->ioaddr + SDHCI_TEGRA_CQE_BASE_ADDR; 1598 cq_host->ops = &sdhci_tegra_cqhci_ops; 1599 1600 dma64 = host->flags & SDHCI_USE_64_BIT_DMA; 1601 if (dma64) 1602 cq_host->caps |= CQHCI_TASK_DESC_SZ_128; 1603 1604 ret = cqhci_init(cq_host, host->mmc, dma64); 1605 if (ret) 1606 goto cleanup; 1607 1608 ret = __sdhci_add_host(host); 1609 if (ret) 1610 goto cleanup; 1611 1612 return 0; 1613 1614 cleanup: 1615 sdhci_cleanup_host(host); 1616 return ret; 1617 } 1618 1619 static int sdhci_tegra_probe(struct platform_device *pdev) 1620 { 1621 const struct sdhci_tegra_soc_data *soc_data; 1622 struct sdhci_host *host; 1623 struct sdhci_pltfm_host *pltfm_host; 1624 struct sdhci_tegra *tegra_host; 1625 struct clk *clk; 1626 int rc; 1627 1628 soc_data = of_device_get_match_data(&pdev->dev); 1629 if (!soc_data) 1630 return -EINVAL; 1631 1632 host = sdhci_pltfm_init(pdev, soc_data->pdata, sizeof(*tegra_host)); 1633 if (IS_ERR(host)) 1634 return PTR_ERR(host); 1635 pltfm_host = sdhci_priv(host); 1636 1637 tegra_host = sdhci_pltfm_priv(pltfm_host); 1638 tegra_host->ddr_signaling = false; 1639 tegra_host->pad_calib_required = false; 1640 tegra_host->pad_control_available = false; 1641 tegra_host->soc_data = soc_data; 1642 1643 if (soc_data->nvquirks & NVQUIRK_HAS_ANDROID_GPT_SECTOR) 1644 host->mmc->caps2 |= MMC_CAP2_ALT_GPT_TEGRA; 1645 1646 if (soc_data->nvquirks & NVQUIRK_NEEDS_PAD_CONTROL) { 1647 rc = tegra_sdhci_init_pinctrl_info(&pdev->dev, tegra_host); 1648 if (rc == 0) 1649 host->mmc_host_ops.start_signal_voltage_switch = 1650 sdhci_tegra_start_signal_voltage_switch; 1651 } 1652 1653 /* Hook to periodically rerun pad calibration */ 1654 if (soc_data->nvquirks & NVQUIRK_HAS_PADCALIB) 1655 host->mmc_host_ops.request = tegra_sdhci_request; 1656 1657 host->mmc_host_ops.hs400_enhanced_strobe = 1658 tegra_sdhci_hs400_enhanced_strobe; 1659 1660 if (!host->ops->platform_execute_tuning) 1661 host->mmc_host_ops.execute_tuning = 1662 tegra_sdhci_execute_hw_tuning; 1663 1664 rc = mmc_of_parse(host->mmc); 1665 if (rc) 1666 goto err_parse_dt; 1667 1668 if (tegra_host->soc_data->nvquirks & NVQUIRK_ENABLE_DDR50) 1669 host->mmc->caps |= MMC_CAP_1_8V_DDR; 1670 1671 /* HW busy detection is supported, but R1B responses are required. */ 1672 host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_NEED_RSP_BUSY; 1673 1674 /* GPIO CD can be set as a wakeup source */ 1675 host->mmc->caps |= MMC_CAP_CD_WAKE; 1676 1677 tegra_sdhci_parse_dt(host); 1678 1679 tegra_host->power_gpio = devm_gpiod_get_optional(&pdev->dev, "power", 1680 GPIOD_OUT_HIGH); 1681 if (IS_ERR(tegra_host->power_gpio)) { 1682 rc = PTR_ERR(tegra_host->power_gpio); 1683 goto err_power_req; 1684 } 1685 1686 /* 1687 * Tegra210 has a separate SDMMC_LEGACY_TM clock used for host 1688 * timeout clock and SW can choose TMCLK or SDCLK for hardware 1689 * data timeout through the bit USE_TMCLK_FOR_DATA_TIMEOUT of 1690 * the register SDHCI_TEGRA_VENDOR_SYS_SW_CTRL. 1691 * 1692 * USE_TMCLK_FOR_DATA_TIMEOUT bit default is set to 1 and SDMMC uses 1693 * 12Mhz TMCLK which is advertised in host capability register. 1694 * With TMCLK of 12Mhz provides maximum data timeout period that can 1695 * be achieved is 11s better than using SDCLK for data timeout. 1696 * 1697 * So, TMCLK is set to 12Mhz and kept enabled all the time on SoC's 1698 * supporting separate TMCLK. 1699 */ 1700 1701 if (soc_data->nvquirks & NVQUIRK_HAS_TMCLK) { 1702 clk = devm_clk_get(&pdev->dev, "tmclk"); 1703 if (IS_ERR(clk)) { 1704 rc = PTR_ERR(clk); 1705 if (rc == -EPROBE_DEFER) 1706 goto err_power_req; 1707 1708 dev_warn(&pdev->dev, "failed to get tmclk: %d\n", rc); 1709 clk = NULL; 1710 } 1711 1712 clk_set_rate(clk, 12000000); 1713 rc = clk_prepare_enable(clk); 1714 if (rc) { 1715 dev_err(&pdev->dev, 1716 "failed to enable tmclk: %d\n", rc); 1717 goto err_power_req; 1718 } 1719 1720 tegra_host->tmclk = clk; 1721 } 1722 1723 clk = devm_clk_get(mmc_dev(host->mmc), NULL); 1724 if (IS_ERR(clk)) { 1725 rc = dev_err_probe(&pdev->dev, PTR_ERR(clk), 1726 "failed to get clock\n"); 1727 goto err_clk_get; 1728 } 1729 pltfm_host->clk = clk; 1730 1731 tegra_host->rst = devm_reset_control_get_exclusive(&pdev->dev, 1732 "sdhci"); 1733 if (IS_ERR(tegra_host->rst)) { 1734 rc = PTR_ERR(tegra_host->rst); 1735 dev_err(&pdev->dev, "failed to get reset control: %d\n", rc); 1736 goto err_rst_get; 1737 } 1738 1739 rc = devm_tegra_core_dev_init_opp_table_common(&pdev->dev); 1740 if (rc) 1741 goto err_rst_get; 1742 1743 pm_runtime_enable(&pdev->dev); 1744 rc = pm_runtime_resume_and_get(&pdev->dev); 1745 if (rc) 1746 goto err_pm_get; 1747 1748 rc = reset_control_assert(tegra_host->rst); 1749 if (rc) 1750 goto err_rst_assert; 1751 1752 usleep_range(2000, 4000); 1753 1754 rc = reset_control_deassert(tegra_host->rst); 1755 if (rc) 1756 goto err_rst_assert; 1757 1758 usleep_range(2000, 4000); 1759 1760 rc = sdhci_tegra_add_host(host); 1761 if (rc) 1762 goto err_add_host; 1763 1764 return 0; 1765 1766 err_add_host: 1767 reset_control_assert(tegra_host->rst); 1768 err_rst_assert: 1769 pm_runtime_put_sync_suspend(&pdev->dev); 1770 err_pm_get: 1771 pm_runtime_disable(&pdev->dev); 1772 err_rst_get: 1773 err_clk_get: 1774 clk_disable_unprepare(tegra_host->tmclk); 1775 err_power_req: 1776 err_parse_dt: 1777 sdhci_pltfm_free(pdev); 1778 return rc; 1779 } 1780 1781 static int sdhci_tegra_remove(struct platform_device *pdev) 1782 { 1783 struct sdhci_host *host = platform_get_drvdata(pdev); 1784 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 1785 struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); 1786 1787 sdhci_remove_host(host, 0); 1788 1789 reset_control_assert(tegra_host->rst); 1790 usleep_range(2000, 4000); 1791 1792 pm_runtime_put_sync_suspend(&pdev->dev); 1793 pm_runtime_force_suspend(&pdev->dev); 1794 1795 clk_disable_unprepare(tegra_host->tmclk); 1796 sdhci_pltfm_free(pdev); 1797 1798 return 0; 1799 } 1800 1801 static int __maybe_unused sdhci_tegra_runtime_suspend(struct device *dev) 1802 { 1803 struct sdhci_host *host = dev_get_drvdata(dev); 1804 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 1805 1806 clk_disable_unprepare(pltfm_host->clk); 1807 1808 return 0; 1809 } 1810 1811 static int __maybe_unused sdhci_tegra_runtime_resume(struct device *dev) 1812 { 1813 struct sdhci_host *host = dev_get_drvdata(dev); 1814 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 1815 1816 return clk_prepare_enable(pltfm_host->clk); 1817 } 1818 1819 #ifdef CONFIG_PM_SLEEP 1820 static int sdhci_tegra_suspend(struct device *dev) 1821 { 1822 struct sdhci_host *host = dev_get_drvdata(dev); 1823 int ret; 1824 1825 if (host->mmc->caps2 & MMC_CAP2_CQE) { 1826 ret = cqhci_suspend(host->mmc); 1827 if (ret) 1828 return ret; 1829 } 1830 1831 ret = sdhci_suspend_host(host); 1832 if (ret) { 1833 cqhci_resume(host->mmc); 1834 return ret; 1835 } 1836 1837 ret = pm_runtime_force_suspend(dev); 1838 if (ret) { 1839 sdhci_resume_host(host); 1840 cqhci_resume(host->mmc); 1841 return ret; 1842 } 1843 1844 return mmc_gpio_set_cd_wake(host->mmc, true); 1845 } 1846 1847 static int sdhci_tegra_resume(struct device *dev) 1848 { 1849 struct sdhci_host *host = dev_get_drvdata(dev); 1850 int ret; 1851 1852 ret = mmc_gpio_set_cd_wake(host->mmc, false); 1853 if (ret) 1854 return ret; 1855 1856 ret = pm_runtime_force_resume(dev); 1857 if (ret) 1858 return ret; 1859 1860 ret = sdhci_resume_host(host); 1861 if (ret) 1862 goto disable_clk; 1863 1864 if (host->mmc->caps2 & MMC_CAP2_CQE) { 1865 ret = cqhci_resume(host->mmc); 1866 if (ret) 1867 goto suspend_host; 1868 } 1869 1870 return 0; 1871 1872 suspend_host: 1873 sdhci_suspend_host(host); 1874 disable_clk: 1875 pm_runtime_force_suspend(dev); 1876 return ret; 1877 } 1878 #endif 1879 1880 static const struct dev_pm_ops sdhci_tegra_dev_pm_ops = { 1881 SET_RUNTIME_PM_OPS(sdhci_tegra_runtime_suspend, sdhci_tegra_runtime_resume, 1882 NULL) 1883 SET_SYSTEM_SLEEP_PM_OPS(sdhci_tegra_suspend, sdhci_tegra_resume) 1884 }; 1885 1886 static struct platform_driver sdhci_tegra_driver = { 1887 .driver = { 1888 .name = "sdhci-tegra", 1889 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 1890 .of_match_table = sdhci_tegra_dt_match, 1891 .pm = &sdhci_tegra_dev_pm_ops, 1892 }, 1893 .probe = sdhci_tegra_probe, 1894 .remove = sdhci_tegra_remove, 1895 }; 1896 1897 module_platform_driver(sdhci_tegra_driver); 1898 1899 MODULE_DESCRIPTION("SDHCI driver for Tegra"); 1900 MODULE_AUTHOR("Google, Inc."); 1901 MODULE_LICENSE("GPL v2"); 1902