pxa2xx_mmci.c (16259B)
1 /* 2 * Intel XScale PXA255/270 MultiMediaCard/SD/SDIO Controller emulation. 3 * 4 * Copyright (c) 2006 Openedhand Ltd. 5 * Written by Andrzej Zaborowski <balrog@zabor.org> 6 * 7 * This code is licensed under the GPLv2. 8 * 9 * Contributions after 2012-01-13 are licensed under the terms of the 10 * GNU GPL, version 2 or (at your option) any later version. 11 */ 12 13 #include "qemu/osdep.h" 14 #include "qapi/error.h" 15 #include "hw/irq.h" 16 #include "hw/sysbus.h" 17 #include "migration/vmstate.h" 18 #include "hw/arm/pxa.h" 19 #include "hw/sd/sd.h" 20 #include "hw/qdev-properties.h" 21 #include "qemu/log.h" 22 #include "qemu/module.h" 23 #include "trace.h" 24 #include "qom/object.h" 25 26 #define TYPE_PXA2XX_MMCI_BUS "pxa2xx-mmci-bus" 27 /* This is reusing the SDBus typedef from SD_BUS */ 28 DECLARE_INSTANCE_CHECKER(SDBus, PXA2XX_MMCI_BUS, 29 TYPE_PXA2XX_MMCI_BUS) 30 31 struct PXA2xxMMCIState { 32 SysBusDevice parent_obj; 33 34 MemoryRegion iomem; 35 qemu_irq irq; 36 qemu_irq rx_dma; 37 qemu_irq tx_dma; 38 qemu_irq inserted; 39 qemu_irq readonly; 40 41 BlockBackend *blk; 42 SDBus sdbus; 43 44 uint32_t status; 45 uint32_t clkrt; 46 uint32_t spi; 47 uint32_t cmdat; 48 uint32_t resp_tout; 49 uint32_t read_tout; 50 int32_t blklen; 51 int32_t numblk; 52 uint32_t intmask; 53 uint32_t intreq; 54 int32_t cmd; 55 uint32_t arg; 56 57 int32_t active; 58 int32_t bytesleft; 59 uint8_t tx_fifo[64]; 60 uint32_t tx_start; 61 uint32_t tx_len; 62 uint8_t rx_fifo[32]; 63 uint32_t rx_start; 64 uint32_t rx_len; 65 uint16_t resp_fifo[9]; 66 uint32_t resp_len; 67 68 int32_t cmdreq; 69 }; 70 71 static bool pxa2xx_mmci_vmstate_validate(void *opaque, int version_id) 72 { 73 PXA2xxMMCIState *s = opaque; 74 75 return s->tx_start < ARRAY_SIZE(s->tx_fifo) 76 && s->rx_start < ARRAY_SIZE(s->rx_fifo) 77 && s->tx_len <= ARRAY_SIZE(s->tx_fifo) 78 && s->rx_len <= ARRAY_SIZE(s->rx_fifo) 79 && s->resp_len <= ARRAY_SIZE(s->resp_fifo); 80 } 81 82 83 static const VMStateDescription vmstate_pxa2xx_mmci = { 84 .name = "pxa2xx-mmci", 85 .version_id = 2, 86 .minimum_version_id = 2, 87 .fields = (VMStateField[]) { 88 VMSTATE_UINT32(status, PXA2xxMMCIState), 89 VMSTATE_UINT32(clkrt, PXA2xxMMCIState), 90 VMSTATE_UINT32(spi, PXA2xxMMCIState), 91 VMSTATE_UINT32(cmdat, PXA2xxMMCIState), 92 VMSTATE_UINT32(resp_tout, PXA2xxMMCIState), 93 VMSTATE_UINT32(read_tout, PXA2xxMMCIState), 94 VMSTATE_INT32(blklen, PXA2xxMMCIState), 95 VMSTATE_INT32(numblk, PXA2xxMMCIState), 96 VMSTATE_UINT32(intmask, PXA2xxMMCIState), 97 VMSTATE_UINT32(intreq, PXA2xxMMCIState), 98 VMSTATE_INT32(cmd, PXA2xxMMCIState), 99 VMSTATE_UINT32(arg, PXA2xxMMCIState), 100 VMSTATE_INT32(cmdreq, PXA2xxMMCIState), 101 VMSTATE_INT32(active, PXA2xxMMCIState), 102 VMSTATE_INT32(bytesleft, PXA2xxMMCIState), 103 VMSTATE_UINT32(tx_start, PXA2xxMMCIState), 104 VMSTATE_UINT32(tx_len, PXA2xxMMCIState), 105 VMSTATE_UINT32(rx_start, PXA2xxMMCIState), 106 VMSTATE_UINT32(rx_len, PXA2xxMMCIState), 107 VMSTATE_UINT32(resp_len, PXA2xxMMCIState), 108 VMSTATE_VALIDATE("fifo size incorrect", pxa2xx_mmci_vmstate_validate), 109 VMSTATE_UINT8_ARRAY(tx_fifo, PXA2xxMMCIState, 64), 110 VMSTATE_UINT8_ARRAY(rx_fifo, PXA2xxMMCIState, 32), 111 VMSTATE_UINT16_ARRAY(resp_fifo, PXA2xxMMCIState, 9), 112 VMSTATE_END_OF_LIST() 113 } 114 }; 115 116 #define MMC_STRPCL 0x00 /* MMC Clock Start/Stop register */ 117 #define MMC_STAT 0x04 /* MMC Status register */ 118 #define MMC_CLKRT 0x08 /* MMC Clock Rate register */ 119 #define MMC_SPI 0x0c /* MMC SPI Mode register */ 120 #define MMC_CMDAT 0x10 /* MMC Command/Data register */ 121 #define MMC_RESTO 0x14 /* MMC Response Time-Out register */ 122 #define MMC_RDTO 0x18 /* MMC Read Time-Out register */ 123 #define MMC_BLKLEN 0x1c /* MMC Block Length register */ 124 #define MMC_NUMBLK 0x20 /* MMC Number of Blocks register */ 125 #define MMC_PRTBUF 0x24 /* MMC Buffer Partly Full register */ 126 #define MMC_I_MASK 0x28 /* MMC Interrupt Mask register */ 127 #define MMC_I_REG 0x2c /* MMC Interrupt Request register */ 128 #define MMC_CMD 0x30 /* MMC Command register */ 129 #define MMC_ARGH 0x34 /* MMC Argument High register */ 130 #define MMC_ARGL 0x38 /* MMC Argument Low register */ 131 #define MMC_RES 0x3c /* MMC Response FIFO */ 132 #define MMC_RXFIFO 0x40 /* MMC Receive FIFO */ 133 #define MMC_TXFIFO 0x44 /* MMC Transmit FIFO */ 134 #define MMC_RDWAIT 0x48 /* MMC RD_WAIT register */ 135 #define MMC_BLKS_REM 0x4c /* MMC Blocks Remaining register */ 136 137 /* Bitfield masks */ 138 #define STRPCL_STOP_CLK (1 << 0) 139 #define STRPCL_STRT_CLK (1 << 1) 140 #define STAT_TOUT_RES (1 << 1) 141 #define STAT_CLK_EN (1 << 8) 142 #define STAT_DATA_DONE (1 << 11) 143 #define STAT_PRG_DONE (1 << 12) 144 #define STAT_END_CMDRES (1 << 13) 145 #define SPI_SPI_MODE (1 << 0) 146 #define CMDAT_RES_TYPE (3 << 0) 147 #define CMDAT_DATA_EN (1 << 2) 148 #define CMDAT_WR_RD (1 << 3) 149 #define CMDAT_DMA_EN (1 << 7) 150 #define CMDAT_STOP_TRAN (1 << 10) 151 #define INT_DATA_DONE (1 << 0) 152 #define INT_PRG_DONE (1 << 1) 153 #define INT_END_CMD (1 << 2) 154 #define INT_STOP_CMD (1 << 3) 155 #define INT_CLK_OFF (1 << 4) 156 #define INT_RXFIFO_REQ (1 << 5) 157 #define INT_TXFIFO_REQ (1 << 6) 158 #define INT_TINT (1 << 7) 159 #define INT_DAT_ERR (1 << 8) 160 #define INT_RES_ERR (1 << 9) 161 #define INT_RD_STALLED (1 << 10) 162 #define INT_SDIO_INT (1 << 11) 163 #define INT_SDIO_SACK (1 << 12) 164 #define PRTBUF_PRT_BUF (1 << 0) 165 166 /* Route internal interrupt lines to the global IC and DMA */ 167 static void pxa2xx_mmci_int_update(PXA2xxMMCIState *s) 168 { 169 uint32_t mask = s->intmask; 170 if (s->cmdat & CMDAT_DMA_EN) { 171 mask |= INT_RXFIFO_REQ | INT_TXFIFO_REQ; 172 173 qemu_set_irq(s->rx_dma, !!(s->intreq & INT_RXFIFO_REQ)); 174 qemu_set_irq(s->tx_dma, !!(s->intreq & INT_TXFIFO_REQ)); 175 } 176 177 qemu_set_irq(s->irq, !!(s->intreq & ~mask)); 178 } 179 180 static void pxa2xx_mmci_fifo_update(PXA2xxMMCIState *s) 181 { 182 if (!s->active) 183 return; 184 185 if (s->cmdat & CMDAT_WR_RD) { 186 while (s->bytesleft && s->tx_len) { 187 sdbus_write_byte(&s->sdbus, s->tx_fifo[s->tx_start++]); 188 s->tx_start &= 0x1f; 189 s->tx_len --; 190 s->bytesleft --; 191 } 192 if (s->bytesleft) 193 s->intreq |= INT_TXFIFO_REQ; 194 } else 195 while (s->bytesleft && s->rx_len < 32) { 196 s->rx_fifo[(s->rx_start + (s->rx_len ++)) & 0x1f] = 197 sdbus_read_byte(&s->sdbus); 198 s->bytesleft --; 199 s->intreq |= INT_RXFIFO_REQ; 200 } 201 202 if (!s->bytesleft) { 203 s->active = 0; 204 s->intreq |= INT_DATA_DONE; 205 s->status |= STAT_DATA_DONE; 206 207 if (s->cmdat & CMDAT_WR_RD) { 208 s->intreq |= INT_PRG_DONE; 209 s->status |= STAT_PRG_DONE; 210 } 211 } 212 213 pxa2xx_mmci_int_update(s); 214 } 215 216 static void pxa2xx_mmci_wakequeues(PXA2xxMMCIState *s) 217 { 218 int rsplen, i; 219 SDRequest request; 220 uint8_t response[16]; 221 222 s->active = 1; 223 s->rx_len = 0; 224 s->tx_len = 0; 225 s->cmdreq = 0; 226 227 request.cmd = s->cmd; 228 request.arg = s->arg; 229 request.crc = 0; /* FIXME */ 230 231 rsplen = sdbus_do_command(&s->sdbus, &request, response); 232 s->intreq |= INT_END_CMD; 233 234 memset(s->resp_fifo, 0, sizeof(s->resp_fifo)); 235 switch (s->cmdat & CMDAT_RES_TYPE) { 236 #define PXAMMCI_RESP(wd, value0, value1) \ 237 s->resp_fifo[(wd) + 0] |= (value0); \ 238 s->resp_fifo[(wd) + 1] |= (value1) << 8; 239 case 0: /* No response */ 240 goto complete; 241 242 case 1: /* R1, R4, R5 or R6 */ 243 if (rsplen < 4) 244 goto timeout; 245 goto complete; 246 247 case 2: /* R2 */ 248 if (rsplen < 16) 249 goto timeout; 250 goto complete; 251 252 case 3: /* R3 */ 253 if (rsplen < 4) 254 goto timeout; 255 goto complete; 256 257 complete: 258 for (i = 0; rsplen > 0; i ++, rsplen -= 2) { 259 PXAMMCI_RESP(i, response[i * 2], response[i * 2 + 1]); 260 } 261 s->status |= STAT_END_CMDRES; 262 263 if (!(s->cmdat & CMDAT_DATA_EN)) 264 s->active = 0; 265 else 266 s->bytesleft = s->numblk * s->blklen; 267 268 s->resp_len = 0; 269 break; 270 271 timeout: 272 s->active = 0; 273 s->status |= STAT_TOUT_RES; 274 break; 275 } 276 277 pxa2xx_mmci_fifo_update(s); 278 } 279 280 static uint64_t pxa2xx_mmci_read(void *opaque, hwaddr offset, unsigned size) 281 { 282 PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque; 283 uint32_t ret = 0; 284 285 switch (offset) { 286 case MMC_STRPCL: 287 break; 288 case MMC_STAT: 289 ret = s->status; 290 break; 291 case MMC_CLKRT: 292 ret = s->clkrt; 293 break; 294 case MMC_SPI: 295 ret = s->spi; 296 break; 297 case MMC_CMDAT: 298 ret = s->cmdat; 299 break; 300 case MMC_RESTO: 301 ret = s->resp_tout; 302 break; 303 case MMC_RDTO: 304 ret = s->read_tout; 305 break; 306 case MMC_BLKLEN: 307 ret = s->blklen; 308 break; 309 case MMC_NUMBLK: 310 ret = s->numblk; 311 break; 312 case MMC_PRTBUF: 313 break; 314 case MMC_I_MASK: 315 ret = s->intmask; 316 break; 317 case MMC_I_REG: 318 ret = s->intreq; 319 break; 320 case MMC_CMD: 321 ret = s->cmd | 0x40; 322 break; 323 case MMC_ARGH: 324 ret = s->arg >> 16; 325 break; 326 case MMC_ARGL: 327 ret = s->arg & 0xffff; 328 break; 329 case MMC_RES: 330 ret = (s->resp_len < 9) ? s->resp_fifo[s->resp_len++] : 0; 331 break; 332 case MMC_RXFIFO: 333 while (size-- && s->rx_len) { 334 ret |= s->rx_fifo[s->rx_start++] << (size << 3); 335 s->rx_start &= 0x1f; 336 s->rx_len --; 337 } 338 s->intreq &= ~INT_RXFIFO_REQ; 339 pxa2xx_mmci_fifo_update(s); 340 break; 341 case MMC_RDWAIT: 342 break; 343 case MMC_BLKS_REM: 344 ret = s->numblk; 345 break; 346 default: 347 qemu_log_mask(LOG_GUEST_ERROR, 348 "%s: incorrect register 0x%02" HWADDR_PRIx "\n", 349 __func__, offset); 350 } 351 trace_pxa2xx_mmci_read(size, offset, ret); 352 353 return ret; 354 } 355 356 static void pxa2xx_mmci_write(void *opaque, 357 hwaddr offset, uint64_t value, unsigned size) 358 { 359 PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque; 360 361 trace_pxa2xx_mmci_write(size, offset, value); 362 switch (offset) { 363 case MMC_STRPCL: 364 if (value & STRPCL_STRT_CLK) { 365 s->status |= STAT_CLK_EN; 366 s->intreq &= ~INT_CLK_OFF; 367 368 if (s->cmdreq && !(s->cmdat & CMDAT_STOP_TRAN)) { 369 s->status &= STAT_CLK_EN; 370 pxa2xx_mmci_wakequeues(s); 371 } 372 } 373 374 if (value & STRPCL_STOP_CLK) { 375 s->status &= ~STAT_CLK_EN; 376 s->intreq |= INT_CLK_OFF; 377 s->active = 0; 378 } 379 380 pxa2xx_mmci_int_update(s); 381 break; 382 383 case MMC_CLKRT: 384 s->clkrt = value & 7; 385 break; 386 387 case MMC_SPI: 388 s->spi = value & 0xf; 389 if (value & SPI_SPI_MODE) { 390 qemu_log_mask(LOG_GUEST_ERROR, 391 "%s: attempted to use card in SPI mode\n", __func__); 392 } 393 break; 394 395 case MMC_CMDAT: 396 s->cmdat = value & 0x3dff; 397 s->active = 0; 398 s->cmdreq = 1; 399 if (!(value & CMDAT_STOP_TRAN)) { 400 s->status &= STAT_CLK_EN; 401 402 if (s->status & STAT_CLK_EN) 403 pxa2xx_mmci_wakequeues(s); 404 } 405 406 pxa2xx_mmci_int_update(s); 407 break; 408 409 case MMC_RESTO: 410 s->resp_tout = value & 0x7f; 411 break; 412 413 case MMC_RDTO: 414 s->read_tout = value & 0xffff; 415 break; 416 417 case MMC_BLKLEN: 418 s->blklen = value & 0xfff; 419 break; 420 421 case MMC_NUMBLK: 422 s->numblk = value & 0xffff; 423 break; 424 425 case MMC_PRTBUF: 426 if (value & PRTBUF_PRT_BUF) { 427 s->tx_start ^= 32; 428 s->tx_len = 0; 429 } 430 pxa2xx_mmci_fifo_update(s); 431 break; 432 433 case MMC_I_MASK: 434 s->intmask = value & 0x1fff; 435 pxa2xx_mmci_int_update(s); 436 break; 437 438 case MMC_CMD: 439 s->cmd = value & 0x3f; 440 break; 441 442 case MMC_ARGH: 443 s->arg &= 0x0000ffff; 444 s->arg |= value << 16; 445 break; 446 447 case MMC_ARGL: 448 s->arg &= 0xffff0000; 449 s->arg |= value & 0x0000ffff; 450 break; 451 452 case MMC_TXFIFO: 453 while (size-- && s->tx_len < 0x20) 454 s->tx_fifo[(s->tx_start + (s->tx_len ++)) & 0x1f] = 455 (value >> (size << 3)) & 0xff; 456 s->intreq &= ~INT_TXFIFO_REQ; 457 pxa2xx_mmci_fifo_update(s); 458 break; 459 460 case MMC_RDWAIT: 461 case MMC_BLKS_REM: 462 break; 463 464 default: 465 qemu_log_mask(LOG_GUEST_ERROR, 466 "%s: incorrect reg 0x%02" HWADDR_PRIx " " 467 "(value 0x%08" PRIx64 ")\n", __func__, offset, value); 468 } 469 } 470 471 static const MemoryRegionOps pxa2xx_mmci_ops = { 472 .read = pxa2xx_mmci_read, 473 .write = pxa2xx_mmci_write, 474 .endianness = DEVICE_NATIVE_ENDIAN, 475 }; 476 477 PXA2xxMMCIState *pxa2xx_mmci_init(MemoryRegion *sysmem, 478 hwaddr base, 479 qemu_irq irq, qemu_irq rx_dma, qemu_irq tx_dma) 480 { 481 DeviceState *dev; 482 SysBusDevice *sbd; 483 484 dev = qdev_new(TYPE_PXA2XX_MMCI); 485 sbd = SYS_BUS_DEVICE(dev); 486 sysbus_mmio_map(sbd, 0, base); 487 sysbus_connect_irq(sbd, 0, irq); 488 qdev_connect_gpio_out_named(dev, "rx-dma", 0, rx_dma); 489 qdev_connect_gpio_out_named(dev, "tx-dma", 0, tx_dma); 490 sysbus_realize_and_unref(sbd, &error_fatal); 491 492 return PXA2XX_MMCI(dev); 493 } 494 495 static void pxa2xx_mmci_set_inserted(DeviceState *dev, bool inserted) 496 { 497 PXA2xxMMCIState *s = PXA2XX_MMCI(dev); 498 499 qemu_set_irq(s->inserted, inserted); 500 } 501 502 static void pxa2xx_mmci_set_readonly(DeviceState *dev, bool readonly) 503 { 504 PXA2xxMMCIState *s = PXA2XX_MMCI(dev); 505 506 qemu_set_irq(s->readonly, readonly); 507 } 508 509 void pxa2xx_mmci_handlers(PXA2xxMMCIState *s, qemu_irq readonly, 510 qemu_irq coverswitch) 511 { 512 DeviceState *dev = DEVICE(s); 513 514 s->readonly = readonly; 515 s->inserted = coverswitch; 516 517 pxa2xx_mmci_set_inserted(dev, sdbus_get_inserted(&s->sdbus)); 518 pxa2xx_mmci_set_readonly(dev, sdbus_get_readonly(&s->sdbus)); 519 } 520 521 static void pxa2xx_mmci_reset(DeviceState *d) 522 { 523 PXA2xxMMCIState *s = PXA2XX_MMCI(d); 524 525 s->status = 0; 526 s->clkrt = 0; 527 s->spi = 0; 528 s->cmdat = 0; 529 s->resp_tout = 0; 530 s->read_tout = 0; 531 s->blklen = 0; 532 s->numblk = 0; 533 s->intmask = 0; 534 s->intreq = 0; 535 s->cmd = 0; 536 s->arg = 0; 537 s->active = 0; 538 s->bytesleft = 0; 539 s->tx_start = 0; 540 s->tx_len = 0; 541 s->rx_start = 0; 542 s->rx_len = 0; 543 s->resp_len = 0; 544 s->cmdreq = 0; 545 memset(s->tx_fifo, 0, sizeof(s->tx_fifo)); 546 memset(s->rx_fifo, 0, sizeof(s->rx_fifo)); 547 memset(s->resp_fifo, 0, sizeof(s->resp_fifo)); 548 } 549 550 static void pxa2xx_mmci_instance_init(Object *obj) 551 { 552 PXA2xxMMCIState *s = PXA2XX_MMCI(obj); 553 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 554 DeviceState *dev = DEVICE(obj); 555 556 memory_region_init_io(&s->iomem, obj, &pxa2xx_mmci_ops, s, 557 "pxa2xx-mmci", 0x00100000); 558 sysbus_init_mmio(sbd, &s->iomem); 559 sysbus_init_irq(sbd, &s->irq); 560 qdev_init_gpio_out_named(dev, &s->rx_dma, "rx-dma", 1); 561 qdev_init_gpio_out_named(dev, &s->tx_dma, "tx-dma", 1); 562 563 qbus_init(&s->sdbus, sizeof(s->sdbus), 564 TYPE_PXA2XX_MMCI_BUS, DEVICE(obj), "sd-bus"); 565 } 566 567 static void pxa2xx_mmci_class_init(ObjectClass *klass, void *data) 568 { 569 DeviceClass *dc = DEVICE_CLASS(klass); 570 571 dc->vmsd = &vmstate_pxa2xx_mmci; 572 dc->reset = pxa2xx_mmci_reset; 573 } 574 575 static void pxa2xx_mmci_bus_class_init(ObjectClass *klass, void *data) 576 { 577 SDBusClass *sbc = SD_BUS_CLASS(klass); 578 579 sbc->set_inserted = pxa2xx_mmci_set_inserted; 580 sbc->set_readonly = pxa2xx_mmci_set_readonly; 581 } 582 583 static const TypeInfo pxa2xx_mmci_info = { 584 .name = TYPE_PXA2XX_MMCI, 585 .parent = TYPE_SYS_BUS_DEVICE, 586 .instance_size = sizeof(PXA2xxMMCIState), 587 .instance_init = pxa2xx_mmci_instance_init, 588 .class_init = pxa2xx_mmci_class_init, 589 }; 590 591 static const TypeInfo pxa2xx_mmci_bus_info = { 592 .name = TYPE_PXA2XX_MMCI_BUS, 593 .parent = TYPE_SD_BUS, 594 .instance_size = sizeof(SDBus), 595 .class_init = pxa2xx_mmci_bus_class_init, 596 }; 597 598 static void pxa2xx_mmci_register_types(void) 599 { 600 type_register_static(&pxa2xx_mmci_info); 601 type_register_static(&pxa2xx_mmci_bus_info); 602 } 603 604 type_init(pxa2xx_mmci_register_types)