dwc_mmc.c revision 1.16
1 /* $NetBSD: dwc_mmc.c,v 1.16 2019/04/30 23:19:55 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2014-2017 Jared McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: dwc_mmc.c,v 1.16 2019/04/30 23:19:55 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 #include <sys/intr.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 39 #include <dev/sdmmc/sdmmcvar.h> 40 #include <dev/sdmmc/sdmmcchip.h> 41 #include <dev/sdmmc/sdmmc_ioreg.h> 42 43 #include <dev/ic/dwc_mmc_reg.h> 44 #include <dev/ic/dwc_mmc_var.h> 45 46 #define DWC_MMC_NDESC 64 47 48 static int dwc_mmc_host_reset(sdmmc_chipset_handle_t); 49 static uint32_t dwc_mmc_host_ocr(sdmmc_chipset_handle_t); 50 static int dwc_mmc_host_maxblklen(sdmmc_chipset_handle_t); 51 static int dwc_mmc_card_detect(sdmmc_chipset_handle_t); 52 static int dwc_mmc_write_protect(sdmmc_chipset_handle_t); 53 static int dwc_mmc_bus_power(sdmmc_chipset_handle_t, uint32_t); 54 static int dwc_mmc_bus_clock(sdmmc_chipset_handle_t, int); 55 static int dwc_mmc_bus_width(sdmmc_chipset_handle_t, int); 56 static int dwc_mmc_bus_rod(sdmmc_chipset_handle_t, int); 57 static void dwc_mmc_exec_command(sdmmc_chipset_handle_t, 58 struct sdmmc_command *); 59 static void dwc_mmc_card_enable_intr(sdmmc_chipset_handle_t, int); 60 static void dwc_mmc_card_intr_ack(sdmmc_chipset_handle_t); 61 62 static struct sdmmc_chip_functions dwc_mmc_chip_functions = { 63 .host_reset = dwc_mmc_host_reset, 64 .host_ocr = dwc_mmc_host_ocr, 65 .host_maxblklen = dwc_mmc_host_maxblklen, 66 .card_detect = dwc_mmc_card_detect, 67 .write_protect = dwc_mmc_write_protect, 68 .bus_power = dwc_mmc_bus_power, 69 .bus_clock = dwc_mmc_bus_clock, 70 .bus_width = dwc_mmc_bus_width, 71 .bus_rod = dwc_mmc_bus_rod, 72 .exec_command = dwc_mmc_exec_command, 73 .card_enable_intr = dwc_mmc_card_enable_intr, 74 .card_intr_ack = dwc_mmc_card_intr_ack, 75 }; 76 77 #define MMC_WRITE(sc, reg, val) \ 78 bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val)) 79 #define MMC_READ(sc, reg) \ 80 bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg)) 81 82 static void 83 dwc_mmc_dump_regs(struct dwc_mmc_softc *sc) 84 { 85 device_printf(sc->sc_dev, "device registers:\n"); 86 for (u_int off = 0x00; off < 0x100; off += 16) { 87 device_printf(sc->sc_dev, "xxxxxx%02x: %08x %08x %08x %08x\n", 88 off, 89 MMC_READ(sc, off + 0), MMC_READ(sc, off + 4), 90 MMC_READ(sc, off + 8), MMC_READ(sc, off + 12)); 91 } 92 } 93 94 static int 95 dwc_mmc_idma_setup(struct dwc_mmc_softc *sc) 96 { 97 int error; 98 99 sc->sc_idma_xferlen = 0x1000; 100 101 sc->sc_idma_ndesc = DWC_MMC_NDESC; 102 sc->sc_idma_size = sizeof(struct dwc_mmc_idma_desc) * 103 sc->sc_idma_ndesc; 104 error = bus_dmamem_alloc(sc->sc_dmat, sc->sc_idma_size, 8, 105 sc->sc_idma_size, sc->sc_idma_segs, 1, 106 &sc->sc_idma_nsegs, BUS_DMA_WAITOK); 107 if (error) 108 return error; 109 error = bus_dmamem_map(sc->sc_dmat, sc->sc_idma_segs, 110 sc->sc_idma_nsegs, sc->sc_idma_size, 111 &sc->sc_idma_desc, BUS_DMA_WAITOK); 112 if (error) 113 goto free; 114 error = bus_dmamap_create(sc->sc_dmat, sc->sc_idma_size, 1, 115 sc->sc_idma_size, 0, BUS_DMA_WAITOK, &sc->sc_idma_map); 116 if (error) 117 goto unmap; 118 error = bus_dmamap_load(sc->sc_dmat, sc->sc_idma_map, 119 sc->sc_idma_desc, sc->sc_idma_size, NULL, BUS_DMA_WAITOK); 120 if (error) 121 goto destroy; 122 return 0; 123 124 destroy: 125 bus_dmamap_destroy(sc->sc_dmat, sc->sc_idma_map); 126 unmap: 127 bus_dmamem_unmap(sc->sc_dmat, sc->sc_idma_desc, sc->sc_idma_size); 128 free: 129 bus_dmamem_free(sc->sc_dmat, sc->sc_idma_segs, sc->sc_idma_nsegs); 130 return error; 131 } 132 133 static void 134 dwc_mmc_attach_i(device_t self) 135 { 136 struct dwc_mmc_softc *sc = device_private(self); 137 struct sdmmcbus_attach_args saa; 138 139 dwc_mmc_host_reset(sc); 140 dwc_mmc_bus_width(sc, 1); 141 142 memset(&saa, 0, sizeof(saa)); 143 saa.saa_busname = "sdmmc"; 144 saa.saa_sct = &dwc_mmc_chip_functions; 145 saa.saa_sch = sc; 146 saa.saa_clkmin = 400; 147 saa.saa_clkmax = sc->sc_clock_freq / 1000; 148 saa.saa_caps = SMC_CAPS_4BIT_MODE| 149 SMC_CAPS_8BIT_MODE| 150 SMC_CAPS_SD_HIGHSPEED| 151 SMC_CAPS_MMC_HIGHSPEED| 152 SMC_CAPS_AUTO_STOP; 153 if (ISSET(sc->sc_flags, DWC_MMC_F_DMA)) { 154 saa.saa_dmat = sc->sc_dmat; 155 saa.saa_caps |= SMC_CAPS_DMA | 156 SMC_CAPS_MULTI_SEG_DMA; 157 } 158 if (sc->sc_card_detect) 159 saa.saa_caps |= SMC_CAPS_POLL_CARD_DET; 160 161 sc->sc_sdmmc_dev = config_found(self, &saa, NULL); 162 } 163 164 static int 165 dwc_mmc_wait_rint(struct dwc_mmc_softc *sc, uint32_t mask, int timeout) 166 { 167 const bool use_dma = ISSET(sc->sc_flags, DWC_MMC_F_DMA); 168 int retry, error; 169 170 KASSERT(mutex_owned(&sc->sc_intr_lock)); 171 172 if (sc->sc_intr_rint & mask) 173 return 0; 174 175 retry = timeout / hz; 176 177 while (retry > 0) { 178 if (use_dma) { 179 error = cv_timedwait(&sc->sc_intr_cv, 180 &sc->sc_intr_lock, hz); 181 if (error && error != EWOULDBLOCK) 182 return error; 183 if (sc->sc_intr_rint & mask) 184 return 0; 185 } else { 186 sc->sc_intr_rint |= MMC_READ(sc, DWC_MMC_RINT); 187 if (sc->sc_intr_rint & mask) 188 return 0; 189 delay(1000); 190 } 191 --retry; 192 } 193 194 return ETIMEDOUT; 195 } 196 197 static void 198 dwc_mmc_led(struct dwc_mmc_softc *sc, int on) 199 { 200 if (sc->sc_set_led) 201 sc->sc_set_led(sc, on); 202 } 203 204 static int 205 dwc_mmc_host_reset(sdmmc_chipset_handle_t sch) 206 { 207 struct dwc_mmc_softc *sc = sch; 208 uint32_t fifoth, ctrl; 209 int retry = 1000; 210 211 #ifdef DWC_MMC_DEBUG 212 aprint_normal_dev(sc->sc_dev, "host reset\n"); 213 #endif 214 215 MMC_WRITE(sc, DWC_MMC_PWREN, 1); 216 217 MMC_WRITE(sc, DWC_MMC_GCTRL, 218 MMC_READ(sc, DWC_MMC_GCTRL) | DWC_MMC_GCTRL_RESET); 219 while (--retry > 0) { 220 if (!(MMC_READ(sc, DWC_MMC_GCTRL) & DWC_MMC_GCTRL_RESET)) 221 break; 222 delay(100); 223 } 224 225 MMC_WRITE(sc, DWC_MMC_CLKSRC, 0); 226 227 MMC_WRITE(sc, DWC_MMC_TIMEOUT, 0xffffffff); 228 229 MMC_WRITE(sc, DWC_MMC_IMASK, 230 DWC_MMC_INT_CMD_DONE | DWC_MMC_INT_ERROR | 231 DWC_MMC_INT_DATA_OVER | DWC_MMC_INT_AUTO_CMD_DONE); 232 233 const uint32_t rx_wmark = (sc->sc_fifo_depth / 2) - 1; 234 const uint32_t tx_wmark = sc->sc_fifo_depth / 2; 235 fifoth = __SHIFTIN(DWC_MMC_FIFOTH_DMA_MULTIPLE_TXN_SIZE_16, 236 DWC_MMC_FIFOTH_DMA_MULTIPLE_TXN_SIZE); 237 fifoth |= __SHIFTIN(rx_wmark, DWC_MMC_FIFOTH_RX_WMARK); 238 fifoth |= __SHIFTIN(tx_wmark, DWC_MMC_FIFOTH_TX_WMARK); 239 MMC_WRITE(sc, DWC_MMC_FIFOTH, fifoth); 240 241 MMC_WRITE(sc, DWC_MMC_UHS, 0); 242 243 ctrl = MMC_READ(sc, DWC_MMC_GCTRL); 244 ctrl |= DWC_MMC_GCTRL_INTEN; 245 ctrl |= DWC_MMC_GCTRL_DMAEN; 246 ctrl |= DWC_MMC_GCTRL_SEND_AUTO_STOP_CCSD; 247 ctrl |= DWC_MMC_GCTRL_USE_INTERNAL_DMAC; 248 MMC_WRITE(sc, DWC_MMC_GCTRL, ctrl); 249 250 return 0; 251 } 252 253 static uint32_t 254 dwc_mmc_host_ocr(sdmmc_chipset_handle_t sch) 255 { 256 return MMC_OCR_3_2V_3_3V | MMC_OCR_3_3V_3_4V | MMC_OCR_HCS; 257 } 258 259 static int 260 dwc_mmc_host_maxblklen(sdmmc_chipset_handle_t sch) 261 { 262 return 32768; 263 } 264 265 static int 266 dwc_mmc_card_detect(sdmmc_chipset_handle_t sch) 267 { 268 struct dwc_mmc_softc *sc = sch; 269 270 if (!sc->sc_card_detect) 271 return 1; /* no card detect pin, assume present */ 272 273 return sc->sc_card_detect(sc); 274 } 275 276 static int 277 dwc_mmc_write_protect(sdmmc_chipset_handle_t sch) 278 { 279 struct dwc_mmc_softc *sc = sch; 280 281 if (!sc->sc_write_protect) 282 return 0; /* no write protect pin, assume rw */ 283 284 return sc->sc_write_protect(sc); 285 } 286 287 static int 288 dwc_mmc_bus_power(sdmmc_chipset_handle_t sch, uint32_t ocr) 289 { 290 return 0; 291 } 292 293 static int 294 dwc_mmc_update_clock(struct dwc_mmc_softc *sc) 295 { 296 uint32_t cmd; 297 int retry; 298 299 #ifdef DWC_MMC_DEBUG 300 aprint_normal_dev(sc->sc_dev, "update clock\n"); 301 #endif 302 303 cmd = DWC_MMC_CMD_START | 304 DWC_MMC_CMD_UPCLK_ONLY | 305 DWC_MMC_CMD_WAIT_PRE_OVER; 306 if (ISSET(sc->sc_flags, DWC_MMC_F_USE_HOLD_REG)) 307 cmd |= DWC_MMC_CMD_USE_HOLD_REG; 308 MMC_WRITE(sc, DWC_MMC_ARG, 0); 309 MMC_WRITE(sc, DWC_MMC_CMD, cmd); 310 retry = 200000; 311 while (--retry > 0) { 312 if (!(MMC_READ(sc, DWC_MMC_CMD) & DWC_MMC_CMD_START)) 313 break; 314 delay(10); 315 } 316 317 if (retry == 0) { 318 aprint_error_dev(sc->sc_dev, "timeout updating clock\n"); 319 #ifdef DWC_MMC_DEBUG 320 device_printf(sc->sc_dev, "GCTRL: 0x%08x\n", 321 MMC_READ(sc, DWC_MMC_GCTRL)); 322 device_printf(sc->sc_dev, "CLKENA: 0x%08x\n", 323 MMC_READ(sc, DWC_MMC_CLKENA)); 324 device_printf(sc->sc_dev, "CLKDIV: 0x%08x\n", 325 MMC_READ(sc, DWC_MMC_CLKDIV)); 326 device_printf(sc->sc_dev, "TIMEOUT: 0x%08x\n", 327 MMC_READ(sc, DWC_MMC_TIMEOUT)); 328 device_printf(sc->sc_dev, "WIDTH: 0x%08x\n", 329 MMC_READ(sc, DWC_MMC_WIDTH)); 330 device_printf(sc->sc_dev, "CMD: 0x%08x\n", 331 MMC_READ(sc, DWC_MMC_CMD)); 332 device_printf(sc->sc_dev, "MINT: 0x%08x\n", 333 MMC_READ(sc, DWC_MMC_MINT)); 334 device_printf(sc->sc_dev, "RINT: 0x%08x\n", 335 MMC_READ(sc, DWC_MMC_RINT)); 336 device_printf(sc->sc_dev, "STATUS: 0x%08x\n", 337 MMC_READ(sc, DWC_MMC_STATUS)); 338 #endif 339 return ETIMEDOUT; 340 } 341 342 return 0; 343 } 344 345 static int 346 dwc_mmc_set_clock(struct dwc_mmc_softc *sc, u_int freq) 347 { 348 const u_int pll_freq = sc->sc_clock_freq / 1000; 349 u_int clk_div; 350 351 if (freq != pll_freq) 352 clk_div = howmany(pll_freq, freq); 353 else 354 clk_div = 0; 355 356 MMC_WRITE(sc, DWC_MMC_CLKDIV, clk_div); 357 358 return dwc_mmc_update_clock(sc); 359 } 360 361 static int 362 dwc_mmc_bus_clock(sdmmc_chipset_handle_t sch, int freq) 363 { 364 struct dwc_mmc_softc *sc = sch; 365 uint32_t clkena; 366 367 MMC_WRITE(sc, DWC_MMC_CLKSRC, 0); 368 MMC_WRITE(sc, DWC_MMC_CLKENA, 0); 369 if (dwc_mmc_update_clock(sc) != 0) 370 return 1; 371 372 if (freq) { 373 if (sc->sc_bus_clock && sc->sc_bus_clock(sc, freq) != 0) 374 return 1; 375 376 if (dwc_mmc_set_clock(sc, freq) != 0) 377 return 1; 378 379 clkena = DWC_MMC_CLKENA_CARDCLKON; 380 MMC_WRITE(sc, DWC_MMC_CLKENA, clkena); 381 if (dwc_mmc_update_clock(sc) != 0) 382 return 1; 383 } 384 385 delay(1000); 386 387 return 0; 388 } 389 390 static int 391 dwc_mmc_bus_width(sdmmc_chipset_handle_t sch, int width) 392 { 393 struct dwc_mmc_softc *sc = sch; 394 395 #ifdef DWC_MMC_DEBUG 396 aprint_normal_dev(sc->sc_dev, "width = %d\n", width); 397 #endif 398 399 switch (width) { 400 case 1: 401 MMC_WRITE(sc, DWC_MMC_WIDTH, DWC_MMC_WIDTH_1); 402 break; 403 case 4: 404 MMC_WRITE(sc, DWC_MMC_WIDTH, DWC_MMC_WIDTH_4); 405 break; 406 case 8: 407 MMC_WRITE(sc, DWC_MMC_WIDTH, DWC_MMC_WIDTH_8); 408 break; 409 default: 410 return 1; 411 } 412 413 sc->sc_mmc_width = width; 414 415 return 0; 416 } 417 418 static int 419 dwc_mmc_bus_rod(sdmmc_chipset_handle_t sch, int on) 420 { 421 return -1; 422 } 423 424 425 static int 426 dwc_mmc_pio_wait(struct dwc_mmc_softc *sc, struct sdmmc_command *cmd) 427 { 428 int retry = 0xfffff; 429 uint32_t bit = (cmd->c_flags & SCF_CMD_READ) ? 430 DWC_MMC_STATUS_FIFO_EMPTY : DWC_MMC_STATUS_FIFO_FULL; 431 432 while (--retry > 0) { 433 uint32_t status = MMC_READ(sc, DWC_MMC_STATUS); 434 if (!(status & bit)) 435 return 0; 436 delay(10); 437 } 438 439 return ETIMEDOUT; 440 } 441 442 static int 443 dwc_mmc_pio_transfer(struct dwc_mmc_softc *sc, struct sdmmc_command *cmd) 444 { 445 uint32_t *datap = (uint32_t *)cmd->c_data; 446 int i; 447 448 for (i = 0; i < (cmd->c_resid >> 2); i++) { 449 if (dwc_mmc_pio_wait(sc, cmd)) 450 return ETIMEDOUT; 451 if (cmd->c_flags & SCF_CMD_READ) { 452 datap[i] = MMC_READ(sc, sc->sc_fifo_reg); 453 } else { 454 MMC_WRITE(sc, sc->sc_fifo_reg, datap[i]); 455 } 456 } 457 458 return 0; 459 } 460 461 static int 462 dwc_mmc_dma_prepare(struct dwc_mmc_softc *sc, struct sdmmc_command *cmd) 463 { 464 struct dwc_mmc_idma_desc *dma = sc->sc_idma_desc; 465 bus_addr_t desc_paddr = sc->sc_idma_map->dm_segs[0].ds_addr; 466 bus_size_t off; 467 int desc, resid, seg; 468 uint32_t val; 469 470 desc = 0; 471 for (seg = 0; seg < cmd->c_dmamap->dm_nsegs; seg++) { 472 bus_addr_t paddr = cmd->c_dmamap->dm_segs[seg].ds_addr; 473 bus_size_t len = cmd->c_dmamap->dm_segs[seg].ds_len; 474 resid = uimin(len, cmd->c_resid); 475 off = 0; 476 while (resid > 0) { 477 if (desc == sc->sc_idma_ndesc) 478 break; 479 len = uimin(sc->sc_idma_xferlen, resid); 480 dma[desc].dma_buf_size = htole32(len); 481 dma[desc].dma_buf_addr = htole32(paddr + off); 482 dma[desc].dma_config = htole32( 483 DWC_MMC_IDMA_CONFIG_OWN); 484 cmd->c_resid -= len; 485 resid -= len; 486 off += len; 487 dma[desc].dma_next = htole32( 488 desc_paddr + ((desc+1) * 489 sizeof(struct dwc_mmc_idma_desc))); 490 if (desc == 0) { 491 dma[desc].dma_config |= htole32( 492 DWC_MMC_IDMA_CONFIG_FD); 493 } 494 if (cmd->c_resid == 0) { 495 dma[desc].dma_config |= htole32( 496 DWC_MMC_IDMA_CONFIG_LD); 497 } else { 498 dma[desc].dma_config |= 499 htole32(DWC_MMC_IDMA_CONFIG_CH| 500 DWC_MMC_IDMA_CONFIG_DIC); 501 } 502 ++desc; 503 } 504 } 505 if (desc == sc->sc_idma_ndesc) { 506 aprint_error_dev(sc->sc_dev, 507 "not enough descriptors for %d byte transfer!\n", 508 cmd->c_datalen); 509 return EIO; 510 } 511 512 bus_dmamap_sync(sc->sc_dmat, sc->sc_idma_map, 0, 513 sc->sc_idma_size, BUS_DMASYNC_PREWRITE); 514 515 sc->sc_idma_idst = 0; 516 517 val = MMC_READ(sc, DWC_MMC_GCTRL); 518 val |= DWC_MMC_GCTRL_DMAEN; 519 val |= DWC_MMC_GCTRL_INTEN; 520 MMC_WRITE(sc, DWC_MMC_GCTRL, val); 521 val |= DWC_MMC_GCTRL_DMARESET; 522 MMC_WRITE(sc, DWC_MMC_GCTRL, val); 523 MMC_WRITE(sc, DWC_MMC_DMAC, DWC_MMC_DMAC_SOFTRESET); 524 MMC_WRITE(sc, DWC_MMC_DMAC, 525 DWC_MMC_DMAC_IDMA_ON|DWC_MMC_DMAC_FIX_BURST); 526 val = MMC_READ(sc, DWC_MMC_IDIE); 527 val &= ~(DWC_MMC_IDST_RECEIVE_INT|DWC_MMC_IDST_TRANSMIT_INT); 528 if (cmd->c_flags & SCF_CMD_READ) 529 val |= DWC_MMC_IDST_RECEIVE_INT; 530 else 531 val |= DWC_MMC_IDST_TRANSMIT_INT; 532 MMC_WRITE(sc, DWC_MMC_IDIE, val); 533 MMC_WRITE(sc, DWC_MMC_DLBA, desc_paddr); 534 535 return 0; 536 } 537 538 static void 539 dwc_mmc_dma_complete(struct dwc_mmc_softc *sc) 540 { 541 bus_dmamap_sync(sc->sc_dmat, sc->sc_idma_map, 0, 542 sc->sc_idma_size, BUS_DMASYNC_POSTWRITE); 543 } 544 545 static void 546 dwc_mmc_exec_command(sdmmc_chipset_handle_t sch, struct sdmmc_command *cmd) 547 { 548 struct dwc_mmc_softc *sc = sch; 549 uint32_t cmdval = DWC_MMC_CMD_START; 550 int retry = 200000; 551 552 #ifdef DWC_MMC_DEBUG 553 aprint_normal_dev(sc->sc_dev, 554 "opcode %d flags 0x%x data %p datalen %d blklen %d\n", 555 cmd->c_opcode, cmd->c_flags, cmd->c_data, cmd->c_datalen, 556 cmd->c_blklen); 557 #endif 558 559 mutex_enter(&sc->sc_intr_lock); 560 561 do { 562 const uint32_t status = MMC_READ(sc, DWC_MMC_STATUS); 563 if ((status & DWC_MMC_STATUS_CARD_DATA_BUSY) == 0) 564 break; 565 delay(10); 566 } while (--retry > 0); 567 if (retry == 0) { 568 aprint_error_dev(sc->sc_dev, "timeout waiting for data busy\n"); 569 cmd->c_error = ETIMEDOUT; 570 goto done; 571 } 572 573 MMC_WRITE(sc, DWC_MMC_IDST, 0xffffffff); 574 MMC_WRITE(sc, DWC_MMC_RINT, 0xffffffff); 575 576 if (ISSET(sc->sc_flags, DWC_MMC_F_USE_HOLD_REG)) 577 cmdval |= DWC_MMC_CMD_USE_HOLD_REG; 578 579 if (cmd->c_opcode == 0) 580 cmdval |= DWC_MMC_CMD_SEND_INIT_SEQ; 581 if (cmd->c_flags & SCF_RSP_PRESENT) 582 cmdval |= DWC_MMC_CMD_RSP_EXP; 583 if (cmd->c_flags & SCF_RSP_136) 584 cmdval |= DWC_MMC_CMD_LONG_RSP; 585 if (cmd->c_flags & SCF_RSP_CRC) 586 cmdval |= DWC_MMC_CMD_CHECK_RSP_CRC; 587 588 if (cmd->c_datalen > 0) { 589 unsigned int nblks; 590 591 cmdval |= DWC_MMC_CMD_DATA_EXP | DWC_MMC_CMD_WAIT_PRE_OVER; 592 if (!ISSET(cmd->c_flags, SCF_CMD_READ)) { 593 cmdval |= DWC_MMC_CMD_WRITE; 594 } 595 596 nblks = cmd->c_datalen / cmd->c_blklen; 597 if (nblks == 0 || (cmd->c_datalen % cmd->c_blklen) != 0) 598 ++nblks; 599 600 if (nblks > 1) { 601 cmdval |= DWC_MMC_CMD_SEND_AUTO_STOP; 602 } 603 604 MMC_WRITE(sc, DWC_MMC_BLKSZ, cmd->c_blklen); 605 MMC_WRITE(sc, DWC_MMC_BYTECNT, nblks * cmd->c_blklen); 606 } 607 608 sc->sc_intr_rint = 0; 609 610 MMC_WRITE(sc, DWC_MMC_ARG, cmd->c_arg); 611 612 #ifdef DWC_MMC_DEBUG 613 aprint_normal_dev(sc->sc_dev, "cmdval = %08x\n", cmdval); 614 #endif 615 616 if (cmd->c_datalen > 0) { 617 cmd->c_resid = cmd->c_datalen; 618 dwc_mmc_led(sc, 0); 619 if (ISSET(sc->sc_flags, DWC_MMC_F_DMA)) { 620 cmd->c_error = dwc_mmc_dma_prepare(sc, cmd); 621 MMC_WRITE(sc, DWC_MMC_CMD, cmdval | cmd->c_opcode); 622 MMC_WRITE(sc, DWC_MMC_PLDMND, 1); 623 if (cmd->c_error == 0) { 624 const uint32_t idst_mask = 625 DWC_MMC_IDST_ERROR | DWC_MMC_IDST_COMPLETE; 626 retry = 10; 627 while ((sc->sc_idma_idst & idst_mask) == 0) { 628 if (retry == 0) { 629 cmd->c_error = ETIMEDOUT; 630 break; 631 } 632 cv_timedwait(&sc->sc_idst_cv, 633 &sc->sc_intr_lock, hz); 634 } 635 } 636 dwc_mmc_dma_complete(sc); 637 if (sc->sc_idma_idst & DWC_MMC_IDST_ERROR) { 638 cmd->c_error = EIO; 639 } else if (!(sc->sc_idma_idst & DWC_MMC_IDST_COMPLETE)) { 640 cmd->c_error = ETIMEDOUT; 641 } 642 } else { 643 mutex_exit(&sc->sc_intr_lock); 644 MMC_WRITE(sc, DWC_MMC_CMD, cmdval | cmd->c_opcode); 645 cmd->c_error = dwc_mmc_pio_transfer(sc, cmd); 646 mutex_enter(&sc->sc_intr_lock); 647 } 648 dwc_mmc_led(sc, 1); 649 if (cmd->c_error) { 650 #ifdef DWC_MMC_DEBUG 651 aprint_error_dev(sc->sc_dev, 652 "xfer failed, error %d\n", cmd->c_error); 653 #endif 654 goto done; 655 } 656 } else { 657 MMC_WRITE(sc, DWC_MMC_CMD, cmdval | cmd->c_opcode); 658 } 659 660 cmd->c_error = dwc_mmc_wait_rint(sc, 661 DWC_MMC_INT_ERROR|DWC_MMC_INT_CMD_DONE, hz * 10); 662 if (cmd->c_error == 0 && (sc->sc_intr_rint & DWC_MMC_INT_ERROR)) { 663 if (sc->sc_intr_rint & DWC_MMC_INT_RESP_TIMEOUT) { 664 cmd->c_error = ETIMEDOUT; 665 } else { 666 cmd->c_error = EIO; 667 } 668 } 669 if (cmd->c_error) { 670 #ifdef DWC_MMC_DEBUG 671 aprint_error_dev(sc->sc_dev, 672 "cmd failed, error %d\n", cmd->c_error); 673 #endif 674 goto done; 675 } 676 677 if (cmd->c_datalen > 0) { 678 cmd->c_error = dwc_mmc_wait_rint(sc, 679 DWC_MMC_INT_ERROR| 680 DWC_MMC_INT_AUTO_CMD_DONE| 681 DWC_MMC_INT_DATA_OVER, 682 hz*10); 683 if (cmd->c_error == 0 && 684 (sc->sc_intr_rint & DWC_MMC_INT_ERROR)) { 685 cmd->c_error = ETIMEDOUT; 686 } 687 if (cmd->c_error) { 688 #ifdef DWC_MMC_DEBUG 689 aprint_error_dev(sc->sc_dev, 690 "data timeout, rint = %08x\n", 691 sc->sc_intr_rint); 692 #endif 693 dwc_mmc_dump_regs(sc); 694 cmd->c_error = ETIMEDOUT; 695 goto done; 696 } 697 } 698 699 if (cmd->c_flags & SCF_RSP_PRESENT) { 700 if (cmd->c_flags & SCF_RSP_136) { 701 cmd->c_resp[0] = MMC_READ(sc, DWC_MMC_RESP0); 702 cmd->c_resp[1] = MMC_READ(sc, DWC_MMC_RESP1); 703 cmd->c_resp[2] = MMC_READ(sc, DWC_MMC_RESP2); 704 cmd->c_resp[3] = MMC_READ(sc, DWC_MMC_RESP3); 705 if (cmd->c_flags & SCF_RSP_CRC) { 706 cmd->c_resp[0] = (cmd->c_resp[0] >> 8) | 707 (cmd->c_resp[1] << 24); 708 cmd->c_resp[1] = (cmd->c_resp[1] >> 8) | 709 (cmd->c_resp[2] << 24); 710 cmd->c_resp[2] = (cmd->c_resp[2] >> 8) | 711 (cmd->c_resp[3] << 24); 712 cmd->c_resp[3] = (cmd->c_resp[3] >> 8); 713 } 714 } else { 715 cmd->c_resp[0] = MMC_READ(sc, DWC_MMC_RESP0); 716 } 717 } 718 719 done: 720 cmd->c_flags |= SCF_ITSDONE; 721 mutex_exit(&sc->sc_intr_lock); 722 723 if (cmd->c_error) { 724 #ifdef DWC_MMC_DEBUG 725 aprint_error_dev(sc->sc_dev, "i/o error %d\n", cmd->c_error); 726 #endif 727 MMC_WRITE(sc, DWC_MMC_GCTRL, 728 MMC_READ(sc, DWC_MMC_GCTRL) | 729 DWC_MMC_GCTRL_DMARESET | DWC_MMC_GCTRL_FIFORESET); 730 for (retry = 0; retry < 1000; retry++) { 731 if (!(MMC_READ(sc, DWC_MMC_GCTRL) & DWC_MMC_GCTRL_RESET)) 732 break; 733 delay(10); 734 } 735 dwc_mmc_update_clock(sc); 736 } 737 738 if (!ISSET(sc->sc_flags, DWC_MMC_F_DMA)) { 739 MMC_WRITE(sc, DWC_MMC_GCTRL, 740 MMC_READ(sc, DWC_MMC_GCTRL) | DWC_MMC_GCTRL_FIFORESET); 741 } 742 } 743 744 static void 745 dwc_mmc_card_enable_intr(sdmmc_chipset_handle_t sch, int enable) 746 { 747 } 748 749 static void 750 dwc_mmc_card_intr_ack(sdmmc_chipset_handle_t sch) 751 { 752 } 753 754 int 755 dwc_mmc_init(struct dwc_mmc_softc *sc) 756 { 757 uint32_t val; 758 759 if (sc->sc_fifo_reg == 0) { 760 val = MMC_READ(sc, DWC_MMC_VERID); 761 const u_int id = __SHIFTOUT(val, DWC_MMC_VERID_ID); 762 763 if (id < DWC_MMC_VERID_240A) 764 sc->sc_fifo_reg = 0x100; 765 else 766 sc->sc_fifo_reg = 0x200; 767 } 768 769 if (sc->sc_fifo_depth == 0) { 770 val = MMC_READ(sc, DWC_MMC_FIFOTH); 771 sc->sc_fifo_depth = __SHIFTOUT(val, DWC_MMC_FIFOTH_RX_WMARK) + 1; 772 } 773 774 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_BIO); 775 cv_init(&sc->sc_intr_cv, "dwcmmcirq"); 776 cv_init(&sc->sc_idst_cv, "dwcmmcdma"); 777 778 const bool use_dma = ISSET(sc->sc_flags, DWC_MMC_F_DMA); 779 780 aprint_debug_dev(sc->sc_dev, "using %s for transfers\n", 781 use_dma ? "DMA" : "PIO"); 782 783 if (use_dma && dwc_mmc_idma_setup(sc) != 0) { 784 aprint_error_dev(sc->sc_dev, "failed to setup DMA\n"); 785 return ENOMEM; 786 } 787 788 config_interrupts(sc->sc_dev, dwc_mmc_attach_i); 789 790 return 0; 791 } 792 793 int 794 dwc_mmc_intr(void *priv) 795 { 796 struct dwc_mmc_softc *sc = priv; 797 uint32_t idst, rint, mint; 798 799 mutex_enter(&sc->sc_intr_lock); 800 idst = MMC_READ(sc, DWC_MMC_IDST); 801 rint = MMC_READ(sc, DWC_MMC_RINT); 802 mint = MMC_READ(sc, DWC_MMC_MINT); 803 if (!idst && !rint && !mint) { 804 mutex_exit(&sc->sc_intr_lock); 805 return 0; 806 } 807 MMC_WRITE(sc, DWC_MMC_IDST, idst); 808 MMC_WRITE(sc, DWC_MMC_RINT, rint); 809 MMC_WRITE(sc, DWC_MMC_MINT, mint); 810 811 #ifdef DWC_MMC_DEBUG 812 device_printf(sc->sc_dev, "mmc intr idst=%08X rint=%08X mint=%08X\n", 813 idst, rint, mint); 814 #endif 815 816 if (idst) { 817 sc->sc_idma_idst |= idst; 818 cv_broadcast(&sc->sc_idst_cv); 819 } 820 821 if (rint) { 822 sc->sc_intr_rint |= rint; 823 cv_broadcast(&sc->sc_intr_cv); 824 } 825 826 mutex_exit(&sc->sc_intr_lock); 827 828 return 1; 829 } 830
Indexes created Thu Sep 25 02:09:54 GMT 2025