2 * OMAP on-chip MMC/SD host emulation.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 or
9 * (at your option) version 3 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, see <http://www.gnu.org/licenses/>.
49 uint16_t blen_counter;
51 uint16_t nblk_counter;
66 static void omap_mmc_interrupts_update(struct omap_mmc_s *s)
68 qemu_set_irq(s->irq, !!(s->status & s->mask));
71 static void omap_mmc_fifolevel_update(struct omap_mmc_s *host)
73 if (!host->transfer && !host->fifo_len) {
74 host->status &= 0xf3ff;
78 if (host->fifo_len > host->af_level && host->ddir) {
80 host->status &= 0xfbff;
81 qemu_irq_raise(host->dma[1]);
83 host->status |= 0x0400;
85 host->status &= 0xfbff;
86 qemu_irq_lower(host->dma[1]);
89 if (host->fifo_len < host->ae_level && !host->ddir) {
91 host->status &= 0xf7ff;
92 qemu_irq_raise(host->dma[0]);
94 host->status |= 0x0800;
96 qemu_irq_lower(host->dma[0]);
97 host->status &= 0xf7ff;
102 sd_nore = 0, /* no response */
103 sd_r1, /* normal response command */
104 sd_r2, /* CID, CSD registers */
105 sd_r3, /* OCR register */
106 sd_r6 = 6, /* Published RCA response */
110 static void omap_mmc_command(struct omap_mmc_s *host, int cmd, int dir,
111 sd_cmd_type_t type, int busy, sd_rsp_type_t resptype, int init)
113 uint32_t rspstatus, mask;
116 uint8_t response[16];
118 if (init && cmd == 0) {
119 host->status |= 0x0001;
123 if (resptype == sd_r1 && busy)
126 if (type == sd_adtc) {
127 host->fifo_start = 0;
138 request.arg = host->arg;
139 request.crc = 0; /* FIXME */
141 rsplen = sd_do_command(host->card, &request, response);
143 /* TODO: validate CRCs */
157 mask = OUT_OF_RANGE | ADDRESS_ERROR | BLOCK_LEN_ERROR |
158 ERASE_SEQ_ERROR | ERASE_PARAM | WP_VIOLATION |
159 LOCK_UNLOCK_FAILED | COM_CRC_ERROR | ILLEGAL_COMMAND |
160 CARD_ECC_FAILED | CC_ERROR | SD_ERROR |
162 if (host->sdio & (1 << 13))
163 mask |= AKE_SEQ_ERROR;
164 rspstatus = (response[0] << 24) | (response[1] << 16) |
165 (response[2] << 8) | (response[3] << 0);
183 rspstatus = (response[0] << 24) | (response[1] << 16) |
184 (response[2] << 8) | (response[3] << 0);
185 if (rspstatus & 0x80000000)
186 host->status &= 0xe000;
188 host->status |= 0x1000;
198 mask = 0xe000 | AKE_SEQ_ERROR;
199 rspstatus = (response[2] << 8) | (response[3] << 0);
202 if (rspstatus & mask)
203 host->status |= 0x4000;
205 host->status &= 0xb000;
208 for (rsplen = 0; rsplen < 8; rsplen ++)
209 host->rsp[~rsplen & 7] = response[(rsplen << 1) | 1] |
210 (response[(rsplen << 1) | 0] << 8);
213 host->status |= 0x0080;
215 host->status |= 0x0005; /* Makes it more real */
217 host->status |= 0x0001;
220 static void omap_mmc_transfer(struct omap_mmc_s *host)
229 if (host->fifo_len > host->af_level)
232 value = sd_read_data(host->card);
233 host->fifo[(host->fifo_start + host->fifo_len) & 31] = value;
234 if (-- host->blen_counter) {
235 value = sd_read_data(host->card);
236 host->fifo[(host->fifo_start + host->fifo_len) & 31] |=
238 host->blen_counter --;
246 value = host->fifo[host->fifo_start] & 0xff;
247 sd_write_data(host->card, value);
248 if (-- host->blen_counter) {
249 value = host->fifo[host->fifo_start] >> 8;
250 sd_write_data(host->card, value);
251 host->blen_counter --;
256 host->fifo_start &= 31;
259 if (host->blen_counter == 0) {
260 host->nblk_counter --;
261 host->blen_counter = host->blen;
263 if (host->nblk_counter == 0) {
264 host->nblk_counter = host->nblk;
266 host->status |= 0x0008;
273 static void omap_mmc_update(void *opaque)
275 struct omap_mmc_s *s = opaque;
276 omap_mmc_transfer(s);
277 omap_mmc_fifolevel_update(s);
278 omap_mmc_interrupts_update(s);
281 void omap_mmc_reset(struct omap_mmc_s *host)
284 memset(host->rsp, 0, sizeof(host->rsp));
295 host->blen_counter = 0;
297 host->nblk_counter = 0;
300 host->ae_level = 0x00;
301 host->af_level = 0x1f;
303 host->cdet_wakeup = 0;
304 host->cdet_enable = 0;
305 qemu_set_irq(host->coverswitch, host->cdet_state);
309 static uint64_t omap_mmc_read(void *opaque, hwaddr offset,
313 struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
316 return omap_badwidth_read16(opaque, offset);
320 case 0x00: /* MMC_CMD */
323 case 0x04: /* MMC_ARGL */
324 return s->arg & 0x0000ffff;
326 case 0x08: /* MMC_ARGH */
329 case 0x0c: /* MMC_CON */
330 return (s->dw << 15) | (s->mode << 12) | (s->enable << 11) |
331 (s->be << 10) | s->clkdiv;
333 case 0x10: /* MMC_STAT */
336 case 0x14: /* MMC_IE */
339 case 0x18: /* MMC_CTO */
342 case 0x1c: /* MMC_DTO */
345 case 0x20: /* MMC_DATA */
346 /* TODO: support 8-bit access */
347 i = s->fifo[s->fifo_start];
348 if (s->fifo_len == 0) {
349 printf("MMC: FIFO underrun\n");
355 omap_mmc_transfer(s);
356 omap_mmc_fifolevel_update(s);
357 omap_mmc_interrupts_update(s);
360 case 0x24: /* MMC_BLEN */
361 return s->blen_counter;
363 case 0x28: /* MMC_NBLK */
364 return s->nblk_counter;
366 case 0x2c: /* MMC_BUF */
367 return (s->rx_dma << 15) | (s->af_level << 8) |
368 (s->tx_dma << 7) | s->ae_level;
370 case 0x30: /* MMC_SPI */
372 case 0x34: /* MMC_SDIO */
373 return (s->cdet_wakeup << 2) | (s->cdet_enable) | s->sdio;
374 case 0x38: /* MMC_SYST */
377 case 0x3c: /* MMC_REV */
380 case 0x40: /* MMC_RSP0 */
381 case 0x44: /* MMC_RSP1 */
382 case 0x48: /* MMC_RSP2 */
383 case 0x4c: /* MMC_RSP3 */
384 case 0x50: /* MMC_RSP4 */
385 case 0x54: /* MMC_RSP5 */
386 case 0x58: /* MMC_RSP6 */
387 case 0x5c: /* MMC_RSP7 */
388 return s->rsp[(offset - 0x40) >> 2];
391 case 0x60: /* MMC_IOSR */
392 case 0x64: /* MMC_SYSC */
394 case 0x68: /* MMC_SYSS */
398 OMAP_BAD_REG(offset);
402 static void omap_mmc_write(void *opaque, hwaddr offset,
403 uint64_t value, unsigned size)
406 struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
409 return omap_badwidth_write16(opaque, offset, value);
413 case 0x00: /* MMC_CMD */
418 for (i = 0; i < 8; i ++)
420 omap_mmc_command(s, value & 63, (value >> 15) & 1,
421 (sd_cmd_type_t) ((value >> 12) & 3),
423 (sd_rsp_type_t) ((value >> 8) & 7),
428 case 0x04: /* MMC_ARGL */
429 s->arg &= 0xffff0000;
430 s->arg |= 0x0000ffff & value;
433 case 0x08: /* MMC_ARGH */
434 s->arg &= 0x0000ffff;
435 s->arg |= value << 16;
438 case 0x0c: /* MMC_CON */
439 s->dw = (value >> 15) & 1;
440 s->mode = (value >> 12) & 3;
441 s->enable = (value >> 11) & 1;
442 s->be = (value >> 10) & 1;
443 s->clkdiv = (value >> 0) & (s->rev >= 2 ? 0x3ff : 0xff);
445 printf("SD mode %i unimplemented!\n", s->mode);
447 printf("SD FIFO byte sex unimplemented!\n");
448 if (s->dw != 0 && s->lines < 4)
449 printf("4-bit SD bus enabled\n");
454 case 0x10: /* MMC_STAT */
456 omap_mmc_interrupts_update(s);
459 case 0x14: /* MMC_IE */
460 s->mask = value & 0x7fff;
461 omap_mmc_interrupts_update(s);
464 case 0x18: /* MMC_CTO */
465 s->cto = value & 0xff;
466 if (s->cto > 0xfd && s->rev <= 1)
467 printf("MMC: CTO of 0xff and 0xfe cannot be used!\n");
470 case 0x1c: /* MMC_DTO */
471 s->dto = value & 0xffff;
474 case 0x20: /* MMC_DATA */
475 /* TODO: support 8-bit access */
476 if (s->fifo_len == 32)
478 s->fifo[(s->fifo_start + s->fifo_len) & 31] = value;
480 omap_mmc_transfer(s);
481 omap_mmc_fifolevel_update(s);
482 omap_mmc_interrupts_update(s);
485 case 0x24: /* MMC_BLEN */
486 s->blen = (value & 0x07ff) + 1;
487 s->blen_counter = s->blen;
490 case 0x28: /* MMC_NBLK */
491 s->nblk = (value & 0x07ff) + 1;
492 s->nblk_counter = s->nblk;
493 s->blen_counter = s->blen;
496 case 0x2c: /* MMC_BUF */
497 s->rx_dma = (value >> 15) & 1;
498 s->af_level = (value >> 8) & 0x1f;
499 s->tx_dma = (value >> 7) & 1;
500 s->ae_level = value & 0x1f;
506 omap_mmc_fifolevel_update(s);
507 omap_mmc_interrupts_update(s);
510 /* SPI, SDIO and TEST modes unimplemented */
511 case 0x30: /* MMC_SPI (OMAP1 only) */
513 case 0x34: /* MMC_SDIO */
514 s->sdio = value & (s->rev >= 2 ? 0xfbf3 : 0x2020);
515 s->cdet_wakeup = (value >> 9) & 1;
516 s->cdet_enable = (value >> 2) & 1;
518 case 0x38: /* MMC_SYST */
521 case 0x3c: /* MMC_REV */
522 case 0x40: /* MMC_RSP0 */
523 case 0x44: /* MMC_RSP1 */
524 case 0x48: /* MMC_RSP2 */
525 case 0x4c: /* MMC_RSP3 */
526 case 0x50: /* MMC_RSP4 */
527 case 0x54: /* MMC_RSP5 */
528 case 0x58: /* MMC_RSP6 */
529 case 0x5c: /* MMC_RSP7 */
534 case 0x60: /* MMC_IOSR */
536 printf("MMC: SDIO bits used!\n");
538 case 0x64: /* MMC_SYSC */
539 if (value & (1 << 2)) /* SRTS */
542 case 0x68: /* MMC_SYSS */
547 OMAP_BAD_REG(offset);
551 static const MemoryRegionOps omap_mmc_ops = {
552 .read = omap_mmc_read,
553 .write = omap_mmc_write,
554 .endianness = DEVICE_NATIVE_ENDIAN,
557 static void omap_mmc_cover_cb(void *opaque, int line, int level)
559 struct omap_mmc_s *host = (struct omap_mmc_s *) opaque;
561 if (!host->cdet_state && level) {
562 host->status |= 0x0002;
563 omap_mmc_interrupts_update(host);
564 if (host->cdet_wakeup) {
565 /* TODO: Assert wake-up */
569 if (host->cdet_state != level) {
570 qemu_set_irq(host->coverswitch, level);
571 host->cdet_state = level;
575 struct omap_mmc_s *omap_mmc_init(hwaddr base,
576 MemoryRegion *sysmem,
577 BlockDriverState *bd,
578 qemu_irq irq, qemu_irq dma[], omap_clk clk)
580 struct omap_mmc_s *s = (struct omap_mmc_s *)
581 g_malloc0(sizeof(struct omap_mmc_s));
586 s->lines = 1; /* TODO: needs to be settable per-board */
591 memory_region_init_io(&s->iomem, &omap_mmc_ops, s, "omap.mmc", 0x800);
592 memory_region_add_subregion(sysmem, base, &s->iomem);
594 /* Instantiate the storage */
595 s->card = sd_init(bd, 0);
600 struct omap_mmc_s *omap2_mmc_init(struct omap_target_agent_s *ta,
601 BlockDriverState *bd, qemu_irq irq, qemu_irq dma[],
602 omap_clk fclk, omap_clk iclk)
604 struct omap_mmc_s *s = (struct omap_mmc_s *)
605 g_malloc0(sizeof(struct omap_mmc_s));
615 memory_region_init_io(&s->iomem, &omap_mmc_ops, s, "omap.mmc",
616 omap_l4_region_size(ta, 0));
617 omap_l4_attach(ta, 0, &s->iomem);
619 /* Instantiate the storage */
620 s->card = sd_init(bd, 0);
622 s->cdet = qemu_allocate_irqs(omap_mmc_cover_cb, s, 1)[0];
623 sd_set_cb(s->card, NULL, s->cdet);
628 void omap_mmc_handlers(struct omap_mmc_s *s, qemu_irq ro, qemu_irq cover)
631 sd_set_cb(s->card, ro, s->cdet);
632 s->coverswitch = cover;
633 qemu_set_irq(cover, s->cdet_state);
635 sd_set_cb(s->card, ro, cover);
638 void omap_mmc_enable(struct omap_mmc_s *s, int enable)
640 sd_enable(s->card, enable);