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sys/arm/ti/ti_sdhci.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2013 Ian Lepore <ian@freebsd.org> 5 * Copyright (c) 2011 Ben Gray <ben.r.gray@gmail.com>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/gpio.h> 37 #include <sys/kernel.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/resource.h> 41 #include <sys/rman.h> 42 #include <sys/sysctl.h> 43 #include <sys/taskqueue.h> 44 #include <sys/lock.h> 45 #include <sys/mutex.h> 46 47 #include <arm/ti/ti_cpuid.h> 48 #include <arm/ti/ti_sysc.h> 49 #include "gpio_if.h" 50 51 #include <dev/extres/clk/clk.h> 52 #include <dev/ofw/ofw_bus.h> 53 #include <dev/ofw/ofw_bus_subr.h> 54 55 #include <dev/mmc/bridge.h> 56 #include <dev/mmc/mmcreg.h> 57 #include <dev/mmc/mmcbrvar.h> 58 59 #include <dev/sdhci/sdhci.h> 60 #include <dev/sdhci/sdhci_fdt_gpio.h> 61 #include "sdhci_if.h" 62 63 #include <machine/bus.h> 64 #include <machine/resource.h> 65 #include <machine/intr.h> 66 67 #include "opt_mmccam.h" 68 69 struct ti_sdhci_softc { 70 device_t dev; 71 struct sdhci_fdt_gpio * gpio; 72 struct resource * mem_res; 73 struct resource * irq_res; 74 void * intr_cookie; 75 struct sdhci_slot slot; 76 uint32_t mmchs_reg_off; 77 uint32_t sdhci_reg_off; 78 uint64_t baseclk_hz; 79 uint32_t cmd_and_mode; 80 uint32_t sdhci_clkdiv; 81 boolean_t disable_highspeed; 82 boolean_t force_card_present; 83 boolean_t disable_readonly; 84 }; 85 86 /* 87 * Table of supported FDT compat strings. 88 * 89 * Note that "ti,mmchs" is our own invention, and should be phased out in favor 90 * of the documented names. 91 * 92 * Note that vendor Beaglebone dtsi files use "ti,omap3-hsmmc" for the am335x. 93 */ 94 static struct ofw_compat_data compat_data[] = { 95 {"ti,am335-sdhci", 1}, 96 {"ti,omap3-hsmmc", 1}, 97 {"ti,omap4-hsmmc", 1}, 98 {"ti,mmchs", 1}, 99 {NULL, 0}, 100 }; 101 102 /* 103 * The MMCHS hardware has a few control and status registers at the beginning of 104 * the device's memory map, followed by the standard sdhci register block. 105 * Different SoCs have the register blocks at different offsets from the 106 * beginning of the device. Define some constants to map out the registers we 107 * access, and the various per-SoC offsets. The SDHCI_REG_OFFSET is how far 108 * beyond the MMCHS block the SDHCI block is found; it's the same on all SoCs. 109 */ 110 #define OMAP3_MMCHS_REG_OFFSET 0x000 111 #define OMAP4_MMCHS_REG_OFFSET 0x100 112 #define AM335X_MMCHS_REG_OFFSET 0x100 113 #define SDHCI_REG_OFFSET 0x100 114 115 #define MMCHS_SYSCONFIG 0x010 116 #define MMCHS_SYSCONFIG_RESET (1 << 1) 117 #define MMCHS_SYSSTATUS 0x014 118 #define MMCHS_SYSSTATUS_RESETDONE (1 << 0) 119 #define MMCHS_CON 0x02C 120 #define MMCHS_CON_DW8 (1 << 5) 121 #define MMCHS_CON_DVAL_8_4MS (3 << 9) 122 #define MMCHS_CON_OD (1 << 0) 123 #define MMCHS_SYSCTL 0x12C 124 #define MMCHS_SYSCTL_CLKD_MASK 0x3FF 125 #define MMCHS_SYSCTL_CLKD_SHIFT 6 126 #define MMCHS_SD_CAPA 0x140 127 #define MMCHS_SD_CAPA_VS18 (1 << 26) 128 #define MMCHS_SD_CAPA_VS30 (1 << 25) 129 #define MMCHS_SD_CAPA_VS33 (1 << 24) 130 131 /* Forward declarations, CAM-relataed */ 132 // static void ti_sdhci_cam_poll(struct cam_sim *); 133 // static void ti_sdhci_cam_action(struct cam_sim *, union ccb *); 134 // static int ti_sdhci_cam_settran_settings(struct ti_sdhci_softc *sc, union ccb *); 135 136 static inline uint32_t 137 ti_mmchs_read_4(struct ti_sdhci_softc *sc, bus_size_t off) 138 { 139 140 return (bus_read_4(sc->mem_res, off + sc->mmchs_reg_off)); 141 } 142 143 static inline void 144 ti_mmchs_write_4(struct ti_sdhci_softc *sc, bus_size_t off, uint32_t val) 145 { 146 147 bus_write_4(sc->mem_res, off + sc->mmchs_reg_off, val); 148 } 149 150 static inline uint32_t 151 RD4(struct ti_sdhci_softc *sc, bus_size_t off) 152 { 153 154 return (bus_read_4(sc->mem_res, off + sc->sdhci_reg_off)); 155 } 156 157 static inline void 158 WR4(struct ti_sdhci_softc *sc, bus_size_t off, uint32_t val) 159 { 160 161 bus_write_4(sc->mem_res, off + sc->sdhci_reg_off, val); 162 } 163 164 static uint8_t 165 ti_sdhci_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off) 166 { 167 struct ti_sdhci_softc *sc = device_get_softc(dev); 168 169 return ((RD4(sc, off & ~3) >> (off & 3) * 8) & 0xff); 170 } 171 172 static uint16_t 173 ti_sdhci_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off) 174 { 175 struct ti_sdhci_softc *sc = device_get_softc(dev); 176 uint32_t clkdiv, val32; 177 178 /* 179 * The MMCHS hardware has a non-standard interpretation of the sdclock 180 * divisor bits. It uses the same bit positions as SDHCI 3.0 (15..6) 181 * but doesn't split them into low:high fields. Instead they're a 182 * single number in the range 0..1023 and the number is exactly the 183 * clock divisor (with 0 and 1 both meaning divide by 1). The SDHCI 184 * driver code expects a v2.0 or v3.0 divisor. The shifting and masking 185 * here extracts the MMCHS representation from the hardware word, cleans 186 * those bits out, applies the 2N adjustment, and plugs the result into 187 * the bit positions for the 2.0 or 3.0 divisor in the returned register 188 * value. The ti_sdhci_write_2() routine performs the opposite 189 * transformation when the SDHCI driver writes to the register. 190 */ 191 if (off == SDHCI_CLOCK_CONTROL) { 192 val32 = RD4(sc, SDHCI_CLOCK_CONTROL); 193 clkdiv = ((val32 >> MMCHS_SYSCTL_CLKD_SHIFT) & 194 MMCHS_SYSCTL_CLKD_MASK) / 2; 195 val32 &= ~(MMCHS_SYSCTL_CLKD_MASK << MMCHS_SYSCTL_CLKD_SHIFT); 196 val32 |= (clkdiv & SDHCI_DIVIDER_MASK) << SDHCI_DIVIDER_SHIFT; 197 if (slot->version >= SDHCI_SPEC_300) 198 val32 |= ((clkdiv >> SDHCI_DIVIDER_MASK_LEN) & 199 SDHCI_DIVIDER_HI_MASK) << SDHCI_DIVIDER_HI_SHIFT; 200 return (val32 & 0xffff); 201 } 202 203 /* 204 * Standard 32-bit handling of command and transfer mode. 205 */ 206 if (off == SDHCI_TRANSFER_MODE) { 207 return (sc->cmd_and_mode >> 16); 208 } else if (off == SDHCI_COMMAND_FLAGS) { 209 return (sc->cmd_and_mode & 0x0000ffff); 210 } 211 212 return ((RD4(sc, off & ~3) >> (off & 3) * 8) & 0xffff); 213 } 214 215 static uint32_t 216 ti_sdhci_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off) 217 { 218 struct ti_sdhci_softc *sc = device_get_softc(dev); 219 uint32_t val32; 220 221 val32 = RD4(sc, off); 222 223 /* 224 * If we need to disallow highspeed mode due to the OMAP4 erratum, strip 225 * that flag from the returned capabilities. 226 */ 227 if (off == SDHCI_CAPABILITIES && sc->disable_highspeed) 228 val32 &= ~SDHCI_CAN_DO_HISPD; 229 230 /* 231 * Force the card-present state if necessary. 232 */ 233 if (off == SDHCI_PRESENT_STATE && sc->force_card_present) 234 val32 |= SDHCI_CARD_PRESENT; 235 236 return (val32); 237 } 238 239 static void 240 ti_sdhci_read_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, 241 uint32_t *data, bus_size_t count) 242 { 243 struct ti_sdhci_softc *sc = device_get_softc(dev); 244 245 bus_read_multi_4(sc->mem_res, off + sc->sdhci_reg_off, data, count); 246 } 247 248 static void 249 ti_sdhci_write_1(device_t dev, struct sdhci_slot *slot, bus_size_t off, 250 uint8_t val) 251 { 252 struct ti_sdhci_softc *sc = device_get_softc(dev); 253 uint32_t val32; 254 255 #ifdef MMCCAM 256 uint32_t newval32; 257 if (off == SDHCI_HOST_CONTROL) { 258 val32 = ti_mmchs_read_4(sc, MMCHS_CON); 259 newval32 = val32; 260 if (val & SDHCI_CTRL_8BITBUS) { 261 device_printf(dev, "Custom-enabling 8-bit bus\n"); 262 newval32 |= MMCHS_CON_DW8; 263 } else { 264 device_printf(dev, "Custom-disabling 8-bit bus\n"); 265 newval32 &= ~MMCHS_CON_DW8; 266 } 267 if (newval32 != val32) 268 ti_mmchs_write_4(sc, MMCHS_CON, newval32); 269 } 270 #endif 271 val32 = RD4(sc, off & ~3); 272 val32 &= ~(0xff << (off & 3) * 8); 273 val32 |= (val << (off & 3) * 8); 274 275 WR4(sc, off & ~3, val32); 276 } 277 278 static void 279 ti_sdhci_write_2(device_t dev, struct sdhci_slot *slot, bus_size_t off, 280 uint16_t val) 281 { 282 struct ti_sdhci_softc *sc = device_get_softc(dev); 283 uint32_t clkdiv, val32; 284 285 /* 286 * Translate between the hardware and SDHCI 2.0 or 3.0 representations 287 * of the clock divisor. See the comments in ti_sdhci_read_2() for 288 * details. 289 */ 290 if (off == SDHCI_CLOCK_CONTROL) { 291 clkdiv = (val >> SDHCI_DIVIDER_SHIFT) & SDHCI_DIVIDER_MASK; 292 if (slot->version >= SDHCI_SPEC_300) 293 clkdiv |= ((val >> SDHCI_DIVIDER_HI_SHIFT) & 294 SDHCI_DIVIDER_HI_MASK) << SDHCI_DIVIDER_MASK_LEN; 295 clkdiv *= 2; 296 if (clkdiv > MMCHS_SYSCTL_CLKD_MASK) 297 clkdiv = MMCHS_SYSCTL_CLKD_MASK; 298 val32 = RD4(sc, SDHCI_CLOCK_CONTROL); 299 val32 &= 0xffff0000; 300 val32 |= val & ~(MMCHS_SYSCTL_CLKD_MASK << 301 MMCHS_SYSCTL_CLKD_SHIFT); 302 val32 |= clkdiv << MMCHS_SYSCTL_CLKD_SHIFT; 303 WR4(sc, SDHCI_CLOCK_CONTROL, val32); 304 return; 305 } 306 307 /* 308 * Standard 32-bit handling of command and transfer mode. 309 */ 310 if (off == SDHCI_TRANSFER_MODE) { 311 sc->cmd_and_mode = (sc->cmd_and_mode & 0xffff0000) | 312 ((uint32_t)val & 0x0000ffff); 313 return; 314 } else if (off == SDHCI_COMMAND_FLAGS) { 315 sc->cmd_and_mode = (sc->cmd_and_mode & 0x0000ffff) | 316 ((uint32_t)val << 16); 317 WR4(sc, SDHCI_TRANSFER_MODE, sc->cmd_and_mode); 318 return; 319 } 320 321 val32 = RD4(sc, off & ~3); 322 val32 &= ~(0xffff << (off & 3) * 8); 323 val32 |= ((val & 0xffff) << (off & 3) * 8); 324 WR4(sc, off & ~3, val32); 325 } 326 327 static void 328 ti_sdhci_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, 329 uint32_t val) 330 { 331 struct ti_sdhci_softc *sc = device_get_softc(dev); 332 333 WR4(sc, off, val); 334 } 335 336 static void 337 ti_sdhci_write_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, 338 uint32_t *data, bus_size_t count) 339 { 340 struct ti_sdhci_softc *sc = device_get_softc(dev); 341 342 bus_write_multi_4(sc->mem_res, off + sc->sdhci_reg_off, data, count); 343 } 344 345 static void 346 ti_sdhci_intr(void *arg) 347 { 348 struct ti_sdhci_softc *sc = arg; 349 350 sdhci_generic_intr(&sc->slot); 351 } 352 353 static int 354 ti_sdhci_update_ios(device_t brdev, device_t reqdev) 355 { 356 struct ti_sdhci_softc *sc = device_get_softc(brdev); 357 struct sdhci_slot *slot; 358 struct mmc_ios *ios; 359 uint32_t val32, newval32; 360 361 slot = device_get_ivars(reqdev); 362 ios = &slot->host.ios; 363 364 /* 365 * There is an 8-bit-bus bit in the MMCHS control register which, when 366 * set, overrides the 1 vs 4 bit setting in the standard SDHCI 367 * registers. Set that bit first according to whether an 8-bit bus is 368 * requested, then let the standard driver handle everything else. 369 */ 370 val32 = ti_mmchs_read_4(sc, MMCHS_CON); 371 newval32 = val32; 372 373 if (ios->bus_width == bus_width_8) 374 newval32 |= MMCHS_CON_DW8; 375 else 376 newval32 &= ~MMCHS_CON_DW8; 377 378 if (ios->bus_mode == opendrain) 379 newval32 |= MMCHS_CON_OD; 380 else /* if (ios->bus_mode == pushpull) */ 381 newval32 &= ~MMCHS_CON_OD; 382 383 if (newval32 != val32) 384 ti_mmchs_write_4(sc, MMCHS_CON, newval32); 385 386 return (sdhci_generic_update_ios(brdev, reqdev)); 387 } 388 389 static int 390 ti_sdhci_get_ro(device_t brdev, device_t reqdev) 391 { 392 struct ti_sdhci_softc *sc = device_get_softc(brdev); 393 394 if (sc->disable_readonly) 395 return (0); 396 397 return (sdhci_fdt_gpio_get_readonly(sc->gpio)); 398 } 399 400 static bool 401 ti_sdhci_get_card_present(device_t dev, struct sdhci_slot *slot) 402 { 403 struct ti_sdhci_softc *sc = device_get_softc(dev); 404 405 return (sdhci_fdt_gpio_get_present(sc->gpio)); 406 } 407 408 static int 409 ti_sdhci_detach(device_t dev) 410 { 411 412 /* sdhci_fdt_gpio_teardown(sc->gpio); */ 413 414 return (EBUSY); 415 } 416 417 static int 418 ti_sdhci_hw_init(device_t dev) 419 { 420 struct ti_sdhci_softc *sc = device_get_softc(dev); 421 uint32_t regval; 422 unsigned long timeout; 423 clk_t mmc_clk; 424 int err; 425 426 /* Enable the controller and interface/functional clocks */ 427 if (ti_sysc_clock_enable(device_get_parent(dev)) != 0) { 428 device_printf(dev, "Error: failed to enable MMC clock\n"); 429 return (ENXIO); 430 } 431 432 /* FIXME: Devicetree dosent have any reference to mmc_clk */ 433 err = clk_get_by_name(dev, "mmc_clk", &mmc_clk); 434 if (err) { 435 device_printf(dev, "Can not find mmc_clk\n"); 436 return (ENXIO); 437 } 438 err = clk_get_freq(mmc_clk, &sc->baseclk_hz); 439 if (err) { 440 device_printf(dev, "Cant get mmc_clk frequency\n"); 441 /* AM335x TRM 8.1.6.8 table 8-24 96MHz @ OPP100 */ 442 sc->baseclk_hz = 96000000; 443 } 444 445 /* Issue a softreset to the controller */ 446 ti_mmchs_write_4(sc, MMCHS_SYSCONFIG, MMCHS_SYSCONFIG_RESET); 447 timeout = 1000; 448 while (!(ti_mmchs_read_4(sc, MMCHS_SYSSTATUS) & 449 MMCHS_SYSSTATUS_RESETDONE)) { 450 if (--timeout == 0) { 451 device_printf(dev, 452 "Error: Controller reset operation timed out\n"); 453 break; 454 } 455 DELAY(100); 456 } 457 458 /* 459 * Reset the command and data state machines and also other aspects of 460 * the controller such as bus clock and power. 461 * 462 * If we read the software reset register too fast after writing it we 463 * can get back a zero that means the reset hasn't started yet rather 464 * than that the reset is complete. Per TI recommendations, work around 465 * it by reading until we see the reset bit asserted, then read until 466 * it's clear. We also set the SDHCI_QUIRK_WAITFOR_RESET_ASSERTED quirk 467 * so that the main sdhci driver uses this same logic in its resets. 468 */ 469 ti_sdhci_write_1(dev, NULL, SDHCI_SOFTWARE_RESET, SDHCI_RESET_ALL); 470 timeout = 10000; 471 while ((ti_sdhci_read_1(dev, NULL, SDHCI_SOFTWARE_RESET) & 472 SDHCI_RESET_ALL) != SDHCI_RESET_ALL) { 473 if (--timeout == 0) { 474 break; 475 } 476 DELAY(1); 477 } 478 timeout = 10000; 479 while ((ti_sdhci_read_1(dev, NULL, SDHCI_SOFTWARE_RESET) & 480 SDHCI_RESET_ALL)) { 481 if (--timeout == 0) { 482 device_printf(dev, 483 "Error: Software reset operation timed out\n"); 484 break; 485 } 486 DELAY(100); 487 } 488 489 /* 490 * The attach() routine has examined fdt data and set flags in 491 * slot.host.caps to reflect what voltages we can handle. Set those 492 * values in the CAPA register. Empirical testing shows that the 493 * values in this register can be overwritten at any time, but the 494 * manual says that these values should only be set once, "before 495 * initialization" whatever that means, and that they survive a reset. 496 */ 497 regval = ti_mmchs_read_4(sc, MMCHS_SD_CAPA); 498 if (sc->slot.host.caps & MMC_OCR_LOW_VOLTAGE) 499 regval |= MMCHS_SD_CAPA_VS18; 500 if (sc->slot.host.caps & (MMC_OCR_290_300 | MMC_OCR_300_310)) 501 regval |= MMCHS_SD_CAPA_VS30; 502 ti_mmchs_write_4(sc, MMCHS_SD_CAPA, regval); 503 504 /* Set initial host configuration (1-bit, std speed, pwr off). */ 505 ti_sdhci_write_1(dev, NULL, SDHCI_HOST_CONTROL, 0); 506 ti_sdhci_write_1(dev, NULL, SDHCI_POWER_CONTROL, 0); 507 508 /* Set the initial controller configuration. */ 509 ti_mmchs_write_4(sc, MMCHS_CON, MMCHS_CON_DVAL_8_4MS); 510 511 return (0); 512 } 513 514 static int 515 ti_sdhci_attach(device_t dev) 516 { 517 struct ti_sdhci_softc *sc = device_get_softc(dev); 518 int rid, err; 519 pcell_t prop; 520 phandle_t node; 521 522 sc->dev = dev; 523 524 /* 525 * Get the MMCHS device id from FDT. Use rev address to identify the unit. 526 */ 527 node = ofw_bus_get_node(dev); 528 529 /* 530 * The hardware can inherently do dual-voltage (1p8v, 3p0v) on the first 531 * device, and only 1p8v on other devices unless an external transceiver 532 * is used. The only way we could know about a transceiver is fdt data. 533 * Note that we have to do this before calling ti_sdhci_hw_init() so 534 * that it can set the right values in the CAPA register. 535 */ 536 sc->slot.host.caps |= MMC_OCR_LOW_VOLTAGE; 537 538 if (OF_hasprop(node, "ti,dual-volt")) { 539 sc->slot.host.caps |= MMC_OCR_290_300 | MMC_OCR_300_310; 540 } 541 542 /* 543 * Set the offset from the device's memory start to the MMCHS registers. 544 * Also for OMAP4 disable high speed mode due to erratum ID i626. 545 */ 546 switch (ti_chip()) { 547 #ifdef SOC_OMAP4 548 case CHIP_OMAP_4: 549 sc->mmchs_reg_off = OMAP4_MMCHS_REG_OFFSET; 550 sc->disable_highspeed = true; 551 break; 552 #endif 553 #ifdef SOC_TI_AM335X 554 case CHIP_AM335X: 555 sc->mmchs_reg_off = AM335X_MMCHS_REG_OFFSET; 556 break; 557 #endif 558 default: 559 panic("Unknown OMAP device\n"); 560 } 561 562 /* 563 * The standard SDHCI registers are at a fixed offset (the same on all 564 * SoCs) beyond the MMCHS registers. 565 */ 566 sc->sdhci_reg_off = sc->mmchs_reg_off + SDHCI_REG_OFFSET; 567 568 /* Resource setup. */ 569 rid = 0; 570 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 571 RF_ACTIVE); 572 if (!sc->mem_res) { 573 device_printf(dev, "cannot allocate memory window\n"); 574 err = ENXIO; 575 goto fail; 576 } 577 578 rid = 0; 579 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 580 RF_ACTIVE); 581 if (!sc->irq_res) { 582 device_printf(dev, "cannot allocate interrupt\n"); 583 err = ENXIO; 584 goto fail; 585 } 586 587 if (bus_setup_intr(dev, sc->irq_res, INTR_TYPE_BIO | INTR_MPSAFE, 588 NULL, ti_sdhci_intr, sc, &sc->intr_cookie)) { 589 device_printf(dev, "cannot setup interrupt handler\n"); 590 err = ENXIO; 591 goto fail; 592 } 593 594 /* 595 * Set up handling of card-detect and write-protect gpio lines. 596 * 597 * If there is no write protect info in the fdt data, fall back to the 598 * historical practice of assuming that the card is writable. This 599 * works around bad fdt data from the upstream source. The alternative 600 * would be to trust the sdhci controller's PRESENT_STATE register WP 601 * bit, but it may say write protect is in effect when it's not if the 602 * pinmux setup doesn't route the WP signal into the sdchi block. 603 */ 604 sc->gpio = sdhci_fdt_gpio_setup(sc->dev, &sc->slot); 605 606 if (!OF_hasprop(node, "wp-gpios") && !OF_hasprop(node, "wp-disable")) 607 sc->disable_readonly = true; 608 609 /* Initialise the MMCHS hardware. */ 610 err = ti_sdhci_hw_init(dev); 611 if (err != 0) { 612 /* err should already contain ENXIO from ti_sdhci_hw_init() */ 613 goto fail; 614 } 615 616 /* 617 * The capabilities register can only express base clock frequencies in 618 * the range of 0-63MHz for a v2.0 controller. Since our clock runs 619 * faster than that, the hardware sets the frequency to zero in the 620 * register. When the register contains zero, the sdhci driver expects 621 * slot.max_clk to already have the right value in it. 622 */ 623 sc->slot.max_clk = sc->baseclk_hz; 624 625 /* 626 * The MMCHS timeout counter is based on the output sdclock. Tell the 627 * sdhci driver to recalculate the timeout clock whenever the output 628 * sdclock frequency changes. 629 */ 630 sc->slot.quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; 631 632 /* 633 * The MMCHS hardware shifts the 136-bit response data (in violation of 634 * the spec), so tell the sdhci driver not to do the same in software. 635 */ 636 sc->slot.quirks |= SDHCI_QUIRK_DONT_SHIFT_RESPONSE; 637 638 /* 639 * Reset bits are broken, have to wait to see the bits asserted 640 * before waiting to see them de-asserted. 641 */ 642 sc->slot.quirks |= SDHCI_QUIRK_WAITFOR_RESET_ASSERTED; 643 644 /* 645 * The controller waits for busy responses. 646 */ 647 sc->slot.quirks |= SDHCI_QUIRK_WAIT_WHILE_BUSY; 648 649 /* 650 * DMA is not really broken, I just haven't implemented it yet. 651 */ 652 sc->slot.quirks |= SDHCI_QUIRK_BROKEN_DMA; 653 654 /* 655 * Set up the hardware and go. Note that this sets many of the 656 * slot.host.* fields, so we have to do this before overriding any of 657 * those values based on fdt data, below. 658 */ 659 sdhci_init_slot(dev, &sc->slot, 0); 660 661 /* 662 * The SDHCI controller doesn't realize it, but we can support 8-bit 663 * even though we're not a v3.0 controller. If there's an fdt bus-width 664 * property, honor it. 665 */ 666 if (OF_getencprop(node, "bus-width", &prop, sizeof(prop)) > 0) { 667 sc->slot.host.caps &= ~(MMC_CAP_4_BIT_DATA | 668 MMC_CAP_8_BIT_DATA); 669 switch (prop) { 670 case 8: 671 sc->slot.host.caps |= MMC_CAP_8_BIT_DATA; 672 /* FALLTHROUGH */ 673 case 4: 674 sc->slot.host.caps |= MMC_CAP_4_BIT_DATA; 675 break; 676 case 1: 677 break; 678 default: 679 device_printf(dev, "Bad bus-width value %u\n", prop); 680 break; 681 } 682 } 683 684 /* 685 * If the slot is flagged with the non-removable property, set our flag 686 * to always force the SDHCI_CARD_PRESENT bit on. 687 */ 688 node = ofw_bus_get_node(dev); 689 if (OF_hasprop(node, "non-removable")) 690 sc->force_card_present = true; 691 692 bus_generic_probe(dev); 693 bus_generic_attach(dev); 694 695 sdhci_start_slot(&sc->slot); 696 return (0); 697 698 fail: 699 if (sc->intr_cookie) 700 bus_teardown_intr(dev, sc->irq_res, sc->intr_cookie); 701 if (sc->irq_res) 702 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res); 703 if (sc->mem_res) 704 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res); 705 706 return (err); 707 } 708 709 static int 710 ti_sdhci_probe(device_t dev) 711 { 712 713 if (!ofw_bus_status_okay(dev)) 714 return (ENXIO); 715 716 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) { 717 device_set_desc(dev, "TI MMCHS (SDHCI 2.0)"); 718 return (BUS_PROBE_DEFAULT); 719 } 720 721 return (ENXIO); 722 } 723 724 static device_method_t ti_sdhci_methods[] = { 725 /* Device interface */ 726 DEVMETHOD(device_probe, ti_sdhci_probe), 727 DEVMETHOD(device_attach, ti_sdhci_attach), 728 DEVMETHOD(device_detach, ti_sdhci_detach), 729 730 /* Bus interface */ 731 DEVMETHOD(bus_read_ivar, sdhci_generic_read_ivar), 732 DEVMETHOD(bus_write_ivar, sdhci_generic_write_ivar), 733 734 /* MMC bridge interface */ 735 DEVMETHOD(mmcbr_update_ios, ti_sdhci_update_ios), 736 DEVMETHOD(mmcbr_request, sdhci_generic_request), 737 DEVMETHOD(mmcbr_get_ro, ti_sdhci_get_ro), 738 DEVMETHOD(mmcbr_acquire_host, sdhci_generic_acquire_host), 739 DEVMETHOD(mmcbr_release_host, sdhci_generic_release_host), 740 741 /* SDHCI registers accessors */ 742 DEVMETHOD(sdhci_read_1, ti_sdhci_read_1), 743 DEVMETHOD(sdhci_read_2, ti_sdhci_read_2), 744 DEVMETHOD(sdhci_read_4, ti_sdhci_read_4), 745 DEVMETHOD(sdhci_read_multi_4, ti_sdhci_read_multi_4), 746 DEVMETHOD(sdhci_write_1, ti_sdhci_write_1), 747 DEVMETHOD(sdhci_write_2, ti_sdhci_write_2), 748 DEVMETHOD(sdhci_write_4, ti_sdhci_write_4), 749 DEVMETHOD(sdhci_write_multi_4, ti_sdhci_write_multi_4), 750 DEVMETHOD(sdhci_get_card_present, ti_sdhci_get_card_present), 751 752 DEVMETHOD_END 753 }; 754 755 static devclass_t ti_sdhci_devclass; 756 757 static driver_t ti_sdhci_driver = { 758 "sdhci_ti", 759 ti_sdhci_methods, 760 sizeof(struct ti_sdhci_softc), 761 }; 762 763 DRIVER_MODULE(sdhci_ti, simplebus, ti_sdhci_driver, ti_sdhci_devclass, NULL, 764 NULL); 765 MODULE_DEPEND(sdhci_ti, ti_sysc, 1, 1, 1); 766 SDHCI_DEPEND(sdhci_ti); 767 768 #ifndef MMCCAM 769 MMC_DECLARE_BRIDGE(sdhci_ti); 770 #endif
Cache object: f7e829c09237ecbf2d1e333a6bc6cc64
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