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
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 target_phys_addr_t base;
51 uint16_t blen_counter;
53 uint16_t nblk_counter;
68 static void omap_mmc_interrupts_update(struct omap_mmc_s *s)
70 qemu_set_irq(s->irq, !!(s->status & s->mask));
73 static void omap_mmc_fifolevel_update(struct omap_mmc_s *host)
75 if (!host->transfer && !host->fifo_len) {
76 host->status &= 0xf3ff;
80 if (host->fifo_len > host->af_level && host->ddir) {
82 host->status &= 0xfbff;
83 qemu_irq_raise(host->dma[1]);
85 host->status |= 0x0400;
87 host->status &= 0xfbff;
88 qemu_irq_lower(host->dma[1]);
91 if (host->fifo_len < host->ae_level && !host->ddir) {
93 host->status &= 0xf7ff;
94 qemu_irq_raise(host->dma[0]);
96 host->status |= 0x0800;
98 qemu_irq_lower(host->dma[0]);
99 host->status &= 0xf7ff;
104 sd_nore = 0, /* no response */
105 sd_r1, /* normal response command */
106 sd_r2, /* CID, CSD registers */
107 sd_r3, /* OCR register */
108 sd_r6 = 6, /* Published RCA response */
112 static void omap_mmc_command(struct omap_mmc_s *host, int cmd, int dir,
113 sd_cmd_type_t type, int busy, sd_rsp_type_t resptype, int init)
115 uint32_t rspstatus, mask;
117 struct sd_request_s request;
118 uint8_t response[16];
120 if (init && cmd == 0) {
121 host->status |= 0x0001;
125 if (resptype == sd_r1 && busy)
128 if (type == sd_adtc) {
129 host->fifo_start = 0;
140 request.arg = host->arg;
141 request.crc = 0; /* FIXME */
143 rsplen = sd_do_command(host->card, &request, response);
145 /* TODO: validate CRCs */
159 mask = OUT_OF_RANGE | ADDRESS_ERROR | BLOCK_LEN_ERROR |
160 ERASE_SEQ_ERROR | ERASE_PARAM | WP_VIOLATION |
161 LOCK_UNLOCK_FAILED | COM_CRC_ERROR | ILLEGAL_COMMAND |
162 CARD_ECC_FAILED | CC_ERROR | SD_ERROR |
164 if (host->sdio & (1 << 13))
165 mask |= AKE_SEQ_ERROR;
166 rspstatus = (response[0] << 24) | (response[1] << 16) |
167 (response[2] << 8) | (response[3] << 0);
185 rspstatus = (response[0] << 24) | (response[1] << 16) |
186 (response[2] << 8) | (response[3] << 0);
187 if (rspstatus & 0x80000000)
188 host->status &= 0xe000;
190 host->status |= 0x1000;
200 mask = 0xe000 | AKE_SEQ_ERROR;
201 rspstatus = (response[2] << 8) | (response[3] << 0);
204 if (rspstatus & mask)
205 host->status |= 0x4000;
207 host->status &= 0xb000;
210 for (rsplen = 0; rsplen < 8; rsplen ++)
211 host->rsp[~rsplen & 7] = response[(rsplen << 1) | 1] |
212 (response[(rsplen << 1) | 0] << 8);
215 host->status |= 0x0080;
217 host->status |= 0x0005; /* Makes it more real */
219 host->status |= 0x0001;
222 static void omap_mmc_transfer(struct omap_mmc_s *host)
231 if (host->fifo_len > host->af_level)
234 value = sd_read_data(host->card);
235 host->fifo[(host->fifo_start + host->fifo_len) & 31] = value;
236 if (-- host->blen_counter) {
237 value = sd_read_data(host->card);
238 host->fifo[(host->fifo_start + host->fifo_len) & 31] |=
240 host->blen_counter --;
248 value = host->fifo[host->fifo_start] & 0xff;
249 sd_write_data(host->card, value);
250 if (-- host->blen_counter) {
251 value = host->fifo[host->fifo_start] >> 8;
252 sd_write_data(host->card, value);
253 host->blen_counter --;
258 host->fifo_start &= 31;
261 if (host->blen_counter == 0) {
262 host->nblk_counter --;
263 host->blen_counter = host->blen;
265 if (host->nblk_counter == 0) {
266 host->nblk_counter = host->nblk;
268 host->status |= 0x0008;
275 static void omap_mmc_update(void *opaque)
277 struct omap_mmc_s *s = opaque;
278 omap_mmc_transfer(s);
279 omap_mmc_fifolevel_update(s);
280 omap_mmc_interrupts_update(s);
283 void omap_mmc_reset(struct omap_mmc_s *host)
286 memset(host->rsp, 0, sizeof(host->rsp));
297 host->blen_counter = 0;
299 host->nblk_counter = 0;
302 host->ae_level = 0x00;
303 host->af_level = 0x1f;
305 host->cdet_wakeup = 0;
306 host->cdet_enable = 0;
307 qemu_set_irq(host->coverswitch, host->cdet_state);
311 static uint32_t omap_mmc_read(void *opaque, target_phys_addr_t offset)
314 struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
315 offset &= OMAP_MPUI_REG_MASK;
318 case 0x00: /* MMC_CMD */
321 case 0x04: /* MMC_ARGL */
322 return s->arg & 0x0000ffff;
324 case 0x08: /* MMC_ARGH */
327 case 0x0c: /* MMC_CON */
328 return (s->dw << 15) | (s->mode << 12) | (s->enable << 11) |
329 (s->be << 10) | s->clkdiv;
331 case 0x10: /* MMC_STAT */
334 case 0x14: /* MMC_IE */
337 case 0x18: /* MMC_CTO */
340 case 0x1c: /* MMC_DTO */
343 case 0x20: /* MMC_DATA */
344 /* TODO: support 8-bit access */
345 i = s->fifo[s->fifo_start];
346 if (s->fifo_len == 0) {
347 printf("MMC: FIFO underrun\n");
353 omap_mmc_transfer(s);
354 omap_mmc_fifolevel_update(s);
355 omap_mmc_interrupts_update(s);
358 case 0x24: /* MMC_BLEN */
359 return s->blen_counter;
361 case 0x28: /* MMC_NBLK */
362 return s->nblk_counter;
364 case 0x2c: /* MMC_BUF */
365 return (s->rx_dma << 15) | (s->af_level << 8) |
366 (s->tx_dma << 7) | s->ae_level;
368 case 0x30: /* MMC_SPI */
370 case 0x34: /* MMC_SDIO */
371 return (s->cdet_wakeup << 2) | (s->cdet_enable) | s->sdio;
372 case 0x38: /* MMC_SYST */
375 case 0x3c: /* MMC_REV */
378 case 0x40: /* MMC_RSP0 */
379 case 0x44: /* MMC_RSP1 */
380 case 0x48: /* MMC_RSP2 */
381 case 0x4c: /* MMC_RSP3 */
382 case 0x50: /* MMC_RSP4 */
383 case 0x54: /* MMC_RSP5 */
384 case 0x58: /* MMC_RSP6 */
385 case 0x5c: /* MMC_RSP7 */
386 return s->rsp[(offset - 0x40) >> 2];
389 case 0x60: /* MMC_IOSR */
390 case 0x64: /* MMC_SYSC */
392 case 0x68: /* MMC_SYSS */
396 OMAP_BAD_REG(offset);
400 static void omap_mmc_write(void *opaque, target_phys_addr_t offset,
404 struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
405 offset &= OMAP_MPUI_REG_MASK;
408 case 0x00: /* MMC_CMD */
413 for (i = 0; i < 8; i ++)
415 omap_mmc_command(s, value & 63, (value >> 15) & 1,
416 (sd_cmd_type_t) ((value >> 12) & 3),
418 (sd_rsp_type_t) ((value >> 8) & 7),
423 case 0x04: /* MMC_ARGL */
424 s->arg &= 0xffff0000;
425 s->arg |= 0x0000ffff & value;
428 case 0x08: /* MMC_ARGH */
429 s->arg &= 0x0000ffff;
430 s->arg |= value << 16;
433 case 0x0c: /* MMC_CON */
434 s->dw = (value >> 15) & 1;
435 s->mode = (value >> 12) & 3;
436 s->enable = (value >> 11) & 1;
437 s->be = (value >> 10) & 1;
438 s->clkdiv = (value >> 0) & (s->rev >= 2 ? 0x3ff : 0xff);
440 printf("SD mode %i unimplemented!\n", s->mode);
442 printf("SD FIFO byte sex unimplemented!\n");
443 if (s->dw != 0 && s->lines < 4)
444 printf("4-bit SD bus enabled\n");
449 case 0x10: /* MMC_STAT */
451 omap_mmc_interrupts_update(s);
454 case 0x14: /* MMC_IE */
455 s->mask = value & 0x7fff;
456 omap_mmc_interrupts_update(s);
459 case 0x18: /* MMC_CTO */
460 s->cto = value & 0xff;
461 if (s->cto > 0xfd && s->rev <= 1)
462 printf("MMC: CTO of 0xff and 0xfe cannot be used!\n");
465 case 0x1c: /* MMC_DTO */
466 s->dto = value & 0xffff;
469 case 0x20: /* MMC_DATA */
470 /* TODO: support 8-bit access */
471 if (s->fifo_len == 32)
473 s->fifo[(s->fifo_start + s->fifo_len) & 31] = value;
475 omap_mmc_transfer(s);
476 omap_mmc_fifolevel_update(s);
477 omap_mmc_interrupts_update(s);
480 case 0x24: /* MMC_BLEN */
481 s->blen = (value & 0x07ff) + 1;
482 s->blen_counter = s->blen;
485 case 0x28: /* MMC_NBLK */
486 s->nblk = (value & 0x07ff) + 1;
487 s->nblk_counter = s->nblk;
488 s->blen_counter = s->blen;
491 case 0x2c: /* MMC_BUF */
492 s->rx_dma = (value >> 15) & 1;
493 s->af_level = (value >> 8) & 0x1f;
494 s->tx_dma = (value >> 7) & 1;
495 s->ae_level = value & 0x1f;
501 omap_mmc_fifolevel_update(s);
502 omap_mmc_interrupts_update(s);
505 /* SPI, SDIO and TEST modes unimplemented */
506 case 0x30: /* MMC_SPI (OMAP1 only) */
508 case 0x34: /* MMC_SDIO */
509 s->sdio = value & (s->rev >= 2 ? 0xfbf3 : 0x2020);
510 s->cdet_wakeup = (value >> 9) & 1;
511 s->cdet_enable = (value >> 2) & 1;
513 case 0x38: /* MMC_SYST */
516 case 0x3c: /* MMC_REV */
517 case 0x40: /* MMC_RSP0 */
518 case 0x44: /* MMC_RSP1 */
519 case 0x48: /* MMC_RSP2 */
520 case 0x4c: /* MMC_RSP3 */
521 case 0x50: /* MMC_RSP4 */
522 case 0x54: /* MMC_RSP5 */
523 case 0x58: /* MMC_RSP6 */
524 case 0x5c: /* MMC_RSP7 */
529 case 0x60: /* MMC_IOSR */
531 printf("MMC: SDIO bits used!\n");
533 case 0x64: /* MMC_SYSC */
534 if (value & (1 << 2)) /* SRTS */
537 case 0x68: /* MMC_SYSS */
542 OMAP_BAD_REG(offset);
546 static CPUReadMemoryFunc *omap_mmc_readfn[] = {
547 omap_badwidth_read16,
549 omap_badwidth_read16,
552 static CPUWriteMemoryFunc *omap_mmc_writefn[] = {
553 omap_badwidth_write16,
555 omap_badwidth_write16,
558 static void omap_mmc_cover_cb(void *opaque, int line, int level)
560 struct omap_mmc_s *host = (struct omap_mmc_s *) opaque;
562 if (!host->cdet_state && level) {
563 host->status |= 0x0002;
564 omap_mmc_interrupts_update(host);
565 if (host->cdet_wakeup)
566 /* 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(target_phys_addr_t base,
576 BlockDriverState *bd,
577 qemu_irq irq, qemu_irq dma[], omap_clk clk)
580 struct omap_mmc_s *s = (struct omap_mmc_s *)
581 qemu_mallocz(sizeof(struct omap_mmc_s));
587 s->lines = 1; /* TODO: needs to be settable per-board */
592 iomemtype = cpu_register_io_memory(0, omap_mmc_readfn,
593 omap_mmc_writefn, s);
594 cpu_register_physical_memory(s->base, 0x800, iomemtype);
596 /* Instantiate the storage */
597 s->card = sd_init(bd, 0);
602 struct omap_mmc_s *omap2_mmc_init(struct omap_target_agent_s *ta,
603 BlockDriverState *bd, qemu_irq irq, qemu_irq dma[],
604 omap_clk fclk, omap_clk iclk)
607 struct omap_mmc_s *s = (struct omap_mmc_s *)
608 qemu_mallocz(sizeof(struct omap_mmc_s));
618 iomemtype = cpu_register_io_memory(0, omap_mmc_readfn,
619 omap_mmc_writefn, s);
620 s->base = omap_l4_attach(ta, 0, iomemtype);
622 /* Instantiate the storage */
623 s->card = sd_init(bd, 0);
625 s->cdet = qemu_allocate_irqs(omap_mmc_cover_cb, s, 1)[0];
626 sd_set_cb(s->card, 0, s->cdet);
631 void omap_mmc_handlers(struct omap_mmc_s *s, qemu_irq ro, qemu_irq cover)
634 sd_set_cb(s->card, ro, s->cdet);
635 s->coverswitch = cover;
636 qemu_set_irq(cover, s->cdet_state);
638 sd_set_cb(s->card, ro, cover);
641 void omap_mmc_enable(struct omap_mmc_s *s, int enable)
643 sd_enable(s->card, enable);