2 * OMAP on-chip MMC/SD host emulation.
4 * Copyright (C) 2006-2007 Andrzej Zaborowski <balrog@zabor.org>
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, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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;
115 struct sd_request_s request;
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 uint32_t omap_mmc_read(void *opaque, target_phys_addr_t offset)
312 struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
313 offset &= OMAP_MPUI_REG_MASK;
316 case 0x00: /* MMC_CMD */
319 case 0x04: /* MMC_ARGL */
320 return s->arg & 0x0000ffff;
322 case 0x08: /* MMC_ARGH */
325 case 0x0c: /* MMC_CON */
326 return (s->dw << 15) | (s->mode << 12) | (s->enable << 11) |
327 (s->be << 10) | s->clkdiv;
329 case 0x10: /* MMC_STAT */
332 case 0x14: /* MMC_IE */
335 case 0x18: /* MMC_CTO */
338 case 0x1c: /* MMC_DTO */
341 case 0x20: /* MMC_DATA */
342 /* TODO: support 8-bit access */
343 i = s->fifo[s->fifo_start];
344 if (s->fifo_len == 0) {
345 printf("MMC: FIFO underrun\n");
351 omap_mmc_transfer(s);
352 omap_mmc_fifolevel_update(s);
353 omap_mmc_interrupts_update(s);
356 case 0x24: /* MMC_BLEN */
357 return s->blen_counter;
359 case 0x28: /* MMC_NBLK */
360 return s->nblk_counter;
362 case 0x2c: /* MMC_BUF */
363 return (s->rx_dma << 15) | (s->af_level << 8) |
364 (s->tx_dma << 7) | s->ae_level;
366 case 0x30: /* MMC_SPI */
368 case 0x34: /* MMC_SDIO */
369 return (s->cdet_wakeup << 2) | (s->cdet_enable) | s->sdio;
370 case 0x38: /* MMC_SYST */
373 case 0x3c: /* MMC_REV */
376 case 0x40: /* MMC_RSP0 */
377 case 0x44: /* MMC_RSP1 */
378 case 0x48: /* MMC_RSP2 */
379 case 0x4c: /* MMC_RSP3 */
380 case 0x50: /* MMC_RSP4 */
381 case 0x54: /* MMC_RSP5 */
382 case 0x58: /* MMC_RSP6 */
383 case 0x5c: /* MMC_RSP7 */
384 return s->rsp[(offset - 0x40) >> 2];
387 case 0x60: /* MMC_IOSR */
388 case 0x64: /* MMC_SYSC */
390 case 0x68: /* MMC_SYSS */
394 OMAP_BAD_REG(offset);
398 static void omap_mmc_write(void *opaque, target_phys_addr_t offset,
402 struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
403 offset &= OMAP_MPUI_REG_MASK;
406 case 0x00: /* MMC_CMD */
411 for (i = 0; i < 8; i ++)
413 omap_mmc_command(s, value & 63, (value >> 15) & 1,
414 (sd_cmd_type_t) ((value >> 12) & 3),
416 (sd_rsp_type_t) ((value >> 8) & 7),
421 case 0x04: /* MMC_ARGL */
422 s->arg &= 0xffff0000;
423 s->arg |= 0x0000ffff & value;
426 case 0x08: /* MMC_ARGH */
427 s->arg &= 0x0000ffff;
428 s->arg |= value << 16;
431 case 0x0c: /* MMC_CON */
432 s->dw = (value >> 15) & 1;
433 s->mode = (value >> 12) & 3;
434 s->enable = (value >> 11) & 1;
435 s->be = (value >> 10) & 1;
436 s->clkdiv = (value >> 0) & (s->rev >= 2 ? 0x3ff : 0xff);
438 printf("SD mode %i unimplemented!\n", s->mode);
440 printf("SD FIFO byte sex unimplemented!\n");
441 if (s->dw != 0 && s->lines < 4)
442 printf("4-bit SD bus enabled\n");
447 case 0x10: /* MMC_STAT */
449 omap_mmc_interrupts_update(s);
452 case 0x14: /* MMC_IE */
453 s->mask = value & 0x7fff;
454 omap_mmc_interrupts_update(s);
457 case 0x18: /* MMC_CTO */
458 s->cto = value & 0xff;
459 if (s->cto > 0xfd && s->rev <= 1)
460 printf("MMC: CTO of 0xff and 0xfe cannot be used!\n");
463 case 0x1c: /* MMC_DTO */
464 s->dto = value & 0xffff;
467 case 0x20: /* MMC_DATA */
468 /* TODO: support 8-bit access */
469 if (s->fifo_len == 32)
471 s->fifo[(s->fifo_start + s->fifo_len) & 31] = value;
473 omap_mmc_transfer(s);
474 omap_mmc_fifolevel_update(s);
475 omap_mmc_interrupts_update(s);
478 case 0x24: /* MMC_BLEN */
479 s->blen = (value & 0x07ff) + 1;
480 s->blen_counter = s->blen;
483 case 0x28: /* MMC_NBLK */
484 s->nblk = (value & 0x07ff) + 1;
485 s->nblk_counter = s->nblk;
486 s->blen_counter = s->blen;
489 case 0x2c: /* MMC_BUF */
490 s->rx_dma = (value >> 15) & 1;
491 s->af_level = (value >> 8) & 0x1f;
492 s->tx_dma = (value >> 7) & 1;
493 s->ae_level = value & 0x1f;
499 omap_mmc_fifolevel_update(s);
500 omap_mmc_interrupts_update(s);
503 /* SPI, SDIO and TEST modes unimplemented */
504 case 0x30: /* MMC_SPI (OMAP1 only) */
506 case 0x34: /* MMC_SDIO */
507 s->sdio = value & (s->rev >= 2 ? 0xfbf3 : 0x2020);
508 s->cdet_wakeup = (value >> 9) & 1;
509 s->cdet_enable = (value >> 2) & 1;
511 case 0x38: /* MMC_SYST */
514 case 0x3c: /* MMC_REV */
515 case 0x40: /* MMC_RSP0 */
516 case 0x44: /* MMC_RSP1 */
517 case 0x48: /* MMC_RSP2 */
518 case 0x4c: /* MMC_RSP3 */
519 case 0x50: /* MMC_RSP4 */
520 case 0x54: /* MMC_RSP5 */
521 case 0x58: /* MMC_RSP6 */
522 case 0x5c: /* MMC_RSP7 */
527 case 0x60: /* MMC_IOSR */
529 printf("MMC: SDIO bits used!\n");
531 case 0x64: /* MMC_SYSC */
532 if (value & (1 << 2)) /* SRTS */
535 case 0x68: /* MMC_SYSS */
540 OMAP_BAD_REG(offset);
544 static CPUReadMemoryFunc *omap_mmc_readfn[] = {
545 omap_badwidth_read16,
547 omap_badwidth_read16,
550 static CPUWriteMemoryFunc *omap_mmc_writefn[] = {
551 omap_badwidth_write16,
553 omap_badwidth_write16,
556 static void omap_mmc_cover_cb(void *opaque, int line, int level)
558 struct omap_mmc_s *host = (struct omap_mmc_s *) opaque;
560 if (!host->cdet_state && level) {
561 host->status |= 0x0002;
562 omap_mmc_interrupts_update(host);
563 if (host->cdet_wakeup)
564 /* TODO: Assert wake-up */;
567 if (host->cdet_state != level) {
568 qemu_set_irq(host->coverswitch, level);
569 host->cdet_state = level;
573 struct omap_mmc_s *omap_mmc_init(target_phys_addr_t base,
574 BlockDriverState *bd,
575 qemu_irq irq, qemu_irq dma[], omap_clk clk)
578 struct omap_mmc_s *s = (struct omap_mmc_s *)
579 qemu_mallocz(sizeof(struct omap_mmc_s));
584 s->lines = 1; /* TODO: needs to be settable per-board */
589 iomemtype = cpu_register_io_memory(0, omap_mmc_readfn,
590 omap_mmc_writefn, s);
591 cpu_register_physical_memory(base, 0x800, iomemtype);
593 /* Instantiate the storage */
594 s->card = sd_init(bd, 0);
599 struct omap_mmc_s *omap2_mmc_init(struct omap_target_agent_s *ta,
600 BlockDriverState *bd, qemu_irq irq, qemu_irq dma[],
601 omap_clk fclk, omap_clk iclk)
604 struct omap_mmc_s *s = (struct omap_mmc_s *)
605 qemu_mallocz(sizeof(struct omap_mmc_s));
615 iomemtype = l4_register_io_memory(0, omap_mmc_readfn,
616 omap_mmc_writefn, s);
617 omap_l4_attach(ta, 0, iomemtype);
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, 0, 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);