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/>.
19 #include "qemu/osdep.h"
21 #include "hw/arm/omap.h"
50 uint16_t blen_counter;
52 uint16_t nblk_counter;
67 static void omap_mmc_interrupts_update(struct omap_mmc_s *s)
69 qemu_set_irq(s->irq, !!(s->status & s->mask));
72 static void omap_mmc_fifolevel_update(struct omap_mmc_s *host)
74 if (!host->transfer && !host->fifo_len) {
75 host->status &= 0xf3ff;
79 if (host->fifo_len > host->af_level && host->ddir) {
81 host->status &= 0xfbff;
82 qemu_irq_raise(host->dma[1]);
84 host->status |= 0x0400;
86 host->status &= 0xfbff;
87 qemu_irq_lower(host->dma[1]);
90 if (host->fifo_len < host->ae_level && !host->ddir) {
92 host->status &= 0xf7ff;
93 qemu_irq_raise(host->dma[0]);
95 host->status |= 0x0800;
97 qemu_irq_lower(host->dma[0]);
98 host->status &= 0xf7ff;
103 sd_nore = 0, /* no response */
104 sd_r1, /* normal response command */
105 sd_r2, /* CID, CSD registers */
106 sd_r3, /* OCR register */
107 sd_r6 = 6, /* Published RCA response */
111 static void omap_mmc_command(struct omap_mmc_s *host, int cmd, int dir,
112 sd_cmd_type_t type, int busy, sd_rsp_type_t resptype, int init)
114 uint32_t rspstatus, mask;
117 uint8_t response[16];
119 if (init && cmd == 0) {
120 host->status |= 0x0001;
124 if (resptype == sd_r1 && busy)
127 if (type == sd_adtc) {
128 host->fifo_start = 0;
139 request.arg = host->arg;
140 request.crc = 0; /* FIXME */
142 rsplen = sd_do_command(host->card, &request, response);
144 /* TODO: validate CRCs */
158 mask = OUT_OF_RANGE | ADDRESS_ERROR | BLOCK_LEN_ERROR |
159 ERASE_SEQ_ERROR | ERASE_PARAM | WP_VIOLATION |
160 LOCK_UNLOCK_FAILED | COM_CRC_ERROR | ILLEGAL_COMMAND |
161 CARD_ECC_FAILED | CC_ERROR | SD_ERROR |
163 if (host->sdio & (1 << 13))
164 mask |= AKE_SEQ_ERROR;
165 rspstatus = (response[0] << 24) | (response[1] << 16) |
166 (response[2] << 8) | (response[3] << 0);
184 rspstatus = (response[0] << 24) | (response[1] << 16) |
185 (response[2] << 8) | (response[3] << 0);
186 if (rspstatus & 0x80000000)
187 host->status &= 0xe000;
189 host->status |= 0x1000;
199 mask = 0xe000 | AKE_SEQ_ERROR;
200 rspstatus = (response[2] << 8) | (response[3] << 0);
203 if (rspstatus & mask)
204 host->status |= 0x4000;
206 host->status &= 0xb000;
209 for (rsplen = 0; rsplen < 8; rsplen ++)
210 host->rsp[~rsplen & 7] = response[(rsplen << 1) | 1] |
211 (response[(rsplen << 1) | 0] << 8);
214 host->status |= 0x0080;
216 host->status |= 0x0005; /* Makes it more real */
218 host->status |= 0x0001;
221 static void omap_mmc_transfer(struct omap_mmc_s *host)
230 if (host->fifo_len > host->af_level)
233 value = sd_read_data(host->card);
234 host->fifo[(host->fifo_start + host->fifo_len) & 31] = value;
235 if (-- host->blen_counter) {
236 value = sd_read_data(host->card);
237 host->fifo[(host->fifo_start + host->fifo_len) & 31] |=
239 host->blen_counter --;
247 value = host->fifo[host->fifo_start] & 0xff;
248 sd_write_data(host->card, value);
249 if (-- host->blen_counter) {
250 value = host->fifo[host->fifo_start] >> 8;
251 sd_write_data(host->card, value);
252 host->blen_counter --;
257 host->fifo_start &= 31;
260 if (host->blen_counter == 0) {
261 host->nblk_counter --;
262 host->blen_counter = host->blen;
264 if (host->nblk_counter == 0) {
265 host->nblk_counter = host->nblk;
267 host->status |= 0x0008;
274 static void omap_mmc_update(void *opaque)
276 struct omap_mmc_s *s = opaque;
277 omap_mmc_transfer(s);
278 omap_mmc_fifolevel_update(s);
279 omap_mmc_interrupts_update(s);
282 void omap_mmc_reset(struct omap_mmc_s *host)
285 memset(host->rsp, 0, sizeof(host->rsp));
296 host->blen_counter = 0;
298 host->nblk_counter = 0;
301 host->ae_level = 0x00;
302 host->af_level = 0x1f;
304 host->cdet_wakeup = 0;
305 host->cdet_enable = 0;
306 qemu_set_irq(host->coverswitch, host->cdet_state);
310 static uint64_t omap_mmc_read(void *opaque, hwaddr offset,
314 struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
317 return omap_badwidth_read16(opaque, offset);
321 case 0x00: /* MMC_CMD */
324 case 0x04: /* MMC_ARGL */
325 return s->arg & 0x0000ffff;
327 case 0x08: /* MMC_ARGH */
330 case 0x0c: /* MMC_CON */
331 return (s->dw << 15) | (s->mode << 12) | (s->enable << 11) |
332 (s->be << 10) | s->clkdiv;
334 case 0x10: /* MMC_STAT */
337 case 0x14: /* MMC_IE */
340 case 0x18: /* MMC_CTO */
343 case 0x1c: /* MMC_DTO */
346 case 0x20: /* MMC_DATA */
347 /* TODO: support 8-bit access */
348 i = s->fifo[s->fifo_start];
349 if (s->fifo_len == 0) {
350 printf("MMC: FIFO underrun\n");
356 omap_mmc_transfer(s);
357 omap_mmc_fifolevel_update(s);
358 omap_mmc_interrupts_update(s);
361 case 0x24: /* MMC_BLEN */
362 return s->blen_counter;
364 case 0x28: /* MMC_NBLK */
365 return s->nblk_counter;
367 case 0x2c: /* MMC_BUF */
368 return (s->rx_dma << 15) | (s->af_level << 8) |
369 (s->tx_dma << 7) | s->ae_level;
371 case 0x30: /* MMC_SPI */
373 case 0x34: /* MMC_SDIO */
374 return (s->cdet_wakeup << 2) | (s->cdet_enable) | s->sdio;
375 case 0x38: /* MMC_SYST */
378 case 0x3c: /* MMC_REV */
381 case 0x40: /* MMC_RSP0 */
382 case 0x44: /* MMC_RSP1 */
383 case 0x48: /* MMC_RSP2 */
384 case 0x4c: /* MMC_RSP3 */
385 case 0x50: /* MMC_RSP4 */
386 case 0x54: /* MMC_RSP5 */
387 case 0x58: /* MMC_RSP6 */
388 case 0x5c: /* MMC_RSP7 */
389 return s->rsp[(offset - 0x40) >> 2];
392 case 0x60: /* MMC_IOSR */
393 case 0x64: /* MMC_SYSC */
395 case 0x68: /* MMC_SYSS */
399 OMAP_BAD_REG(offset);
403 static void omap_mmc_write(void *opaque, hwaddr offset,
404 uint64_t value, unsigned size)
407 struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
410 omap_badwidth_write16(opaque, offset, value);
415 case 0x00: /* MMC_CMD */
420 for (i = 0; i < 8; i ++)
422 omap_mmc_command(s, value & 63, (value >> 15) & 1,
423 (sd_cmd_type_t) ((value >> 12) & 3),
425 (sd_rsp_type_t) ((value >> 8) & 7),
430 case 0x04: /* MMC_ARGL */
431 s->arg &= 0xffff0000;
432 s->arg |= 0x0000ffff & value;
435 case 0x08: /* MMC_ARGH */
436 s->arg &= 0x0000ffff;
437 s->arg |= value << 16;
440 case 0x0c: /* MMC_CON */
441 s->dw = (value >> 15) & 1;
442 s->mode = (value >> 12) & 3;
443 s->enable = (value >> 11) & 1;
444 s->be = (value >> 10) & 1;
445 s->clkdiv = (value >> 0) & (s->rev >= 2 ? 0x3ff : 0xff);
447 printf("SD mode %i unimplemented!\n", s->mode);
449 printf("SD FIFO byte sex unimplemented!\n");
450 if (s->dw != 0 && s->lines < 4)
451 printf("4-bit SD bus enabled\n");
456 case 0x10: /* MMC_STAT */
458 omap_mmc_interrupts_update(s);
461 case 0x14: /* MMC_IE */
462 s->mask = value & 0x7fff;
463 omap_mmc_interrupts_update(s);
466 case 0x18: /* MMC_CTO */
467 s->cto = value & 0xff;
468 if (s->cto > 0xfd && s->rev <= 1)
469 printf("MMC: CTO of 0xff and 0xfe cannot be used!\n");
472 case 0x1c: /* MMC_DTO */
473 s->dto = value & 0xffff;
476 case 0x20: /* MMC_DATA */
477 /* TODO: support 8-bit access */
478 if (s->fifo_len == 32)
480 s->fifo[(s->fifo_start + s->fifo_len) & 31] = value;
482 omap_mmc_transfer(s);
483 omap_mmc_fifolevel_update(s);
484 omap_mmc_interrupts_update(s);
487 case 0x24: /* MMC_BLEN */
488 s->blen = (value & 0x07ff) + 1;
489 s->blen_counter = s->blen;
492 case 0x28: /* MMC_NBLK */
493 s->nblk = (value & 0x07ff) + 1;
494 s->nblk_counter = s->nblk;
495 s->blen_counter = s->blen;
498 case 0x2c: /* MMC_BUF */
499 s->rx_dma = (value >> 15) & 1;
500 s->af_level = (value >> 8) & 0x1f;
501 s->tx_dma = (value >> 7) & 1;
502 s->ae_level = value & 0x1f;
508 omap_mmc_fifolevel_update(s);
509 omap_mmc_interrupts_update(s);
512 /* SPI, SDIO and TEST modes unimplemented */
513 case 0x30: /* MMC_SPI (OMAP1 only) */
515 case 0x34: /* MMC_SDIO */
516 s->sdio = value & (s->rev >= 2 ? 0xfbf3 : 0x2020);
517 s->cdet_wakeup = (value >> 9) & 1;
518 s->cdet_enable = (value >> 2) & 1;
520 case 0x38: /* MMC_SYST */
523 case 0x3c: /* MMC_REV */
524 case 0x40: /* MMC_RSP0 */
525 case 0x44: /* MMC_RSP1 */
526 case 0x48: /* MMC_RSP2 */
527 case 0x4c: /* MMC_RSP3 */
528 case 0x50: /* MMC_RSP4 */
529 case 0x54: /* MMC_RSP5 */
530 case 0x58: /* MMC_RSP6 */
531 case 0x5c: /* MMC_RSP7 */
536 case 0x60: /* MMC_IOSR */
538 printf("MMC: SDIO bits used!\n");
540 case 0x64: /* MMC_SYSC */
541 if (value & (1 << 2)) /* SRTS */
544 case 0x68: /* MMC_SYSS */
549 OMAP_BAD_REG(offset);
553 static const MemoryRegionOps omap_mmc_ops = {
554 .read = omap_mmc_read,
555 .write = omap_mmc_write,
556 .endianness = DEVICE_NATIVE_ENDIAN,
559 static void omap_mmc_cover_cb(void *opaque, int line, int level)
561 struct omap_mmc_s *host = (struct omap_mmc_s *) opaque;
563 if (!host->cdet_state && level) {
564 host->status |= 0x0002;
565 omap_mmc_interrupts_update(host);
566 if (host->cdet_wakeup) {
567 /* TODO: Assert wake-up */
571 if (host->cdet_state != level) {
572 qemu_set_irq(host->coverswitch, level);
573 host->cdet_state = level;
577 struct omap_mmc_s *omap_mmc_init(hwaddr base,
578 MemoryRegion *sysmem,
580 qemu_irq irq, qemu_irq dma[], omap_clk clk)
582 struct omap_mmc_s *s = g_new0(struct omap_mmc_s, 1);
587 s->lines = 1; /* TODO: needs to be settable per-board */
592 memory_region_init_io(&s->iomem, NULL, &omap_mmc_ops, s, "omap.mmc", 0x800);
593 memory_region_add_subregion(sysmem, base, &s->iomem);
595 /* Instantiate the storage */
596 s->card = sd_init(blk, false);
597 if (s->card == NULL) {
604 struct omap_mmc_s *omap2_mmc_init(struct omap_target_agent_s *ta,
605 BlockBackend *blk, qemu_irq irq, qemu_irq dma[],
606 omap_clk fclk, omap_clk iclk)
608 struct omap_mmc_s *s = g_new0(struct omap_mmc_s, 1);
618 memory_region_init_io(&s->iomem, NULL, &omap_mmc_ops, s, "omap.mmc",
619 omap_l4_region_size(ta, 0));
620 omap_l4_attach(ta, 0, &s->iomem);
622 /* Instantiate the storage */
623 s->card = sd_init(blk, false);
624 if (s->card == NULL) {
628 s->cdet = qemu_allocate_irq(omap_mmc_cover_cb, s, 0);
629 sd_set_cb(s->card, NULL, s->cdet);
634 void omap_mmc_handlers(struct omap_mmc_s *s, qemu_irq ro, qemu_irq cover)
637 sd_set_cb(s->card, ro, s->cdet);
638 s->coverswitch = cover;
639 qemu_set_irq(cover, s->cdet_state);
641 sd_set_cb(s->card, ro, cover);
644 void omap_mmc_enable(struct omap_mmc_s *s, int enable)
646 sd_enable(s->card, enable);