2 * Copyright 2007, 2010-2011 Freescale Semiconductor, Inc
5 * Based vaguely on the pxa mmc code:
7 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
9 * SPDX-License-Identifier: GPL-2.0+
20 #include <fsl_esdhc.h>
21 #include <fdt_support.h>
24 DECLARE_GLOBAL_DATA_PTR;
27 uint dsaddr; /* SDMA system address register */
28 uint blkattr; /* Block attributes register */
29 uint cmdarg; /* Command argument register */
30 uint xfertyp; /* Transfer type register */
31 uint cmdrsp0; /* Command response 0 register */
32 uint cmdrsp1; /* Command response 1 register */
33 uint cmdrsp2; /* Command response 2 register */
34 uint cmdrsp3; /* Command response 3 register */
35 uint datport; /* Buffer data port register */
36 uint prsstat; /* Present state register */
37 uint proctl; /* Protocol control register */
38 uint sysctl; /* System Control Register */
39 uint irqstat; /* Interrupt status register */
40 uint irqstaten; /* Interrupt status enable register */
41 uint irqsigen; /* Interrupt signal enable register */
42 uint autoc12err; /* Auto CMD error status register */
43 uint hostcapblt; /* Host controller capabilities register */
44 uint wml; /* Watermark level register */
45 uint mixctrl; /* For USDHC */
46 char reserved1[4]; /* reserved */
47 uint fevt; /* Force event register */
48 uint admaes; /* ADMA error status register */
49 uint adsaddr; /* ADMA system address register */
50 char reserved2[160]; /* reserved */
51 uint hostver; /* Host controller version register */
52 char reserved3[4]; /* reserved */
53 uint dmaerraddr; /* DMA error address register */
54 char reserved4[4]; /* reserved */
55 uint dmaerrattr; /* DMA error attribute register */
56 char reserved5[4]; /* reserved */
57 uint hostcapblt2; /* Host controller capabilities register 2 */
58 char reserved6[8]; /* reserved */
59 uint tcr; /* Tuning control register */
60 char reserved7[28]; /* reserved */
61 uint sddirctl; /* SD direction control register */
62 char reserved8[712]; /* reserved */
63 uint scr; /* eSDHC control register */
66 /* Return the XFERTYP flags for a given command and data packet */
67 static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
72 xfertyp |= XFERTYP_DPSEL;
73 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
74 xfertyp |= XFERTYP_DMAEN;
76 if (data->blocks > 1) {
77 xfertyp |= XFERTYP_MSBSEL;
78 xfertyp |= XFERTYP_BCEN;
79 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
80 xfertyp |= XFERTYP_AC12EN;
84 if (data->flags & MMC_DATA_READ)
85 xfertyp |= XFERTYP_DTDSEL;
88 if (cmd->resp_type & MMC_RSP_CRC)
89 xfertyp |= XFERTYP_CCCEN;
90 if (cmd->resp_type & MMC_RSP_OPCODE)
91 xfertyp |= XFERTYP_CICEN;
92 if (cmd->resp_type & MMC_RSP_136)
93 xfertyp |= XFERTYP_RSPTYP_136;
94 else if (cmd->resp_type & MMC_RSP_BUSY)
95 xfertyp |= XFERTYP_RSPTYP_48_BUSY;
96 else if (cmd->resp_type & MMC_RSP_PRESENT)
97 xfertyp |= XFERTYP_RSPTYP_48;
99 #if defined(CONFIG_MX53) || defined(CONFIG_PPC_T4240) || defined(CONFIG_LS102XA)
100 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
101 xfertyp |= XFERTYP_CMDTYP_ABORT;
103 return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
106 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
108 * PIO Read/Write Mode reduce the performace as DMA is not used in this mode.
111 esdhc_pio_read_write(struct mmc *mmc, struct mmc_data *data)
113 struct fsl_esdhc_cfg *cfg = mmc->priv;
114 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
122 if (data->flags & MMC_DATA_READ) {
123 blocks = data->blocks;
126 timeout = PIO_TIMEOUT;
127 size = data->blocksize;
128 irqstat = esdhc_read32(®s->irqstat);
129 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BREN)
132 printf("\nData Read Failed in PIO Mode.");
135 while (size && (!(irqstat & IRQSTAT_TC))) {
136 udelay(100); /* Wait before last byte transfer complete */
137 irqstat = esdhc_read32(®s->irqstat);
138 databuf = in_le32(®s->datport);
139 *((uint *)buffer) = databuf;
146 blocks = data->blocks;
147 buffer = (char *)data->src;
149 timeout = PIO_TIMEOUT;
150 size = data->blocksize;
151 irqstat = esdhc_read32(®s->irqstat);
152 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BWEN)
155 printf("\nData Write Failed in PIO Mode.");
158 while (size && (!(irqstat & IRQSTAT_TC))) {
159 udelay(100); /* Wait before last byte transfer complete */
160 databuf = *((uint *)buffer);
163 irqstat = esdhc_read32(®s->irqstat);
164 out_le32(®s->datport, databuf);
172 static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
175 struct fsl_esdhc_cfg *cfg = mmc->priv;
176 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
180 wml_value = data->blocksize/4;
182 if (data->flags & MMC_DATA_READ) {
183 if (wml_value > WML_RD_WML_MAX)
184 wml_value = WML_RD_WML_MAX_VAL;
186 esdhc_clrsetbits32(®s->wml, WML_RD_WML_MASK, wml_value);
187 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
188 esdhc_write32(®s->dsaddr, (u32)data->dest);
191 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
192 flush_dcache_range((ulong)data->src,
193 (ulong)data->src+data->blocks
196 if (wml_value > WML_WR_WML_MAX)
197 wml_value = WML_WR_WML_MAX_VAL;
198 if ((esdhc_read32(®s->prsstat) & PRSSTAT_WPSPL) == 0) {
199 printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
203 esdhc_clrsetbits32(®s->wml, WML_WR_WML_MASK,
205 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
206 esdhc_write32(®s->dsaddr, (u32)data->src);
210 esdhc_write32(®s->blkattr, data->blocks << 16 | data->blocksize);
212 /* Calculate the timeout period for data transactions */
214 * 1)Timeout period = (2^(timeout+13)) SD Clock cycles
215 * 2)Timeout period should be minimum 0.250sec as per SD Card spec
216 * So, Number of SD Clock cycles for 0.25sec should be minimum
217 * (SD Clock/sec * 0.25 sec) SD Clock cycles
218 * = (mmc->clock * 1/4) SD Clock cycles
220 * => (2^(timeout+13)) >= mmc->clock * 1/4
221 * Taking log2 both the sides
222 * => timeout + 13 >= log2(mmc->clock/4)
223 * Rounding up to next power of 2
224 * => timeout + 13 = log2(mmc->clock/4) + 1
225 * => timeout + 13 = fls(mmc->clock/4)
227 timeout = fls(mmc->clock/4);
236 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC_A001
237 if ((timeout == 4) || (timeout == 8) || (timeout == 12))
241 #ifdef ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE
244 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
249 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
250 static void check_and_invalidate_dcache_range
251 (struct mmc_cmd *cmd,
252 struct mmc_data *data) {
253 unsigned start = (unsigned)data->dest ;
254 unsigned size = roundup(ARCH_DMA_MINALIGN,
255 data->blocks*data->blocksize);
256 unsigned end = start+size ;
257 invalidate_dcache_range(start, end);
262 * Sends a command out on the bus. Takes the mmc pointer,
263 * a command pointer, and an optional data pointer.
266 esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
271 struct fsl_esdhc_cfg *cfg = mmc->priv;
272 volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
274 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
275 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
279 esdhc_write32(®s->irqstat, -1);
283 /* Wait for the bus to be idle */
284 while ((esdhc_read32(®s->prsstat) & PRSSTAT_CICHB) ||
285 (esdhc_read32(®s->prsstat) & PRSSTAT_CIDHB))
288 while (esdhc_read32(®s->prsstat) & PRSSTAT_DLA)
291 /* Wait at least 8 SD clock cycles before the next command */
293 * Note: This is way more than 8 cycles, but 1ms seems to
294 * resolve timing issues with some cards
298 /* Set up for a data transfer if we have one */
300 err = esdhc_setup_data(mmc, data);
305 /* Figure out the transfer arguments */
306 xfertyp = esdhc_xfertyp(cmd, data);
309 esdhc_write32(®s->irqsigen, 0);
311 /* Send the command */
312 esdhc_write32(®s->cmdarg, cmd->cmdarg);
313 #if defined(CONFIG_FSL_USDHC)
314 esdhc_write32(®s->mixctrl,
315 (esdhc_read32(®s->mixctrl) & 0xFFFFFF80) | (xfertyp & 0x7F));
316 esdhc_write32(®s->xfertyp, xfertyp & 0xFFFF0000);
318 esdhc_write32(®s->xfertyp, xfertyp);
321 /* Wait for the command to complete */
322 while (!(esdhc_read32(®s->irqstat) & (IRQSTAT_CC | IRQSTAT_CTOE)))
325 irqstat = esdhc_read32(®s->irqstat);
327 if (irqstat & CMD_ERR) {
332 if (irqstat & IRQSTAT_CTOE) {
337 /* Workaround for ESDHC errata ENGcm03648 */
338 if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
341 /* Poll on DATA0 line for cmd with busy signal for 250 ms */
342 while (timeout > 0 && !(esdhc_read32(®s->prsstat) &
349 printf("Timeout waiting for DAT0 to go high!\n");
355 /* Copy the response to the response buffer */
356 if (cmd->resp_type & MMC_RSP_136) {
357 u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
359 cmdrsp3 = esdhc_read32(®s->cmdrsp3);
360 cmdrsp2 = esdhc_read32(®s->cmdrsp2);
361 cmdrsp1 = esdhc_read32(®s->cmdrsp1);
362 cmdrsp0 = esdhc_read32(®s->cmdrsp0);
363 cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
364 cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
365 cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
366 cmd->response[3] = (cmdrsp0 << 8);
368 cmd->response[0] = esdhc_read32(®s->cmdrsp0);
370 /* Wait until all of the blocks are transferred */
372 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
373 esdhc_pio_read_write(mmc, data);
376 irqstat = esdhc_read32(®s->irqstat);
378 if (irqstat & IRQSTAT_DTOE) {
383 if (irqstat & DATA_ERR) {
387 } while ((irqstat & DATA_COMPLETE) != DATA_COMPLETE);
389 if (data->flags & MMC_DATA_READ)
390 check_and_invalidate_dcache_range(cmd, data);
395 /* Reset CMD and DATA portions on error */
397 esdhc_write32(®s->sysctl, esdhc_read32(®s->sysctl) |
399 while (esdhc_read32(®s->sysctl) & SYSCTL_RSTC)
403 esdhc_write32(®s->sysctl,
404 esdhc_read32(®s->sysctl) |
406 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTD))
411 esdhc_write32(®s->irqstat, -1);
416 static void set_sysctl(struct mmc *mmc, uint clock)
419 struct fsl_esdhc_cfg *cfg = mmc->priv;
420 volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
421 int sdhc_clk = cfg->sdhc_clk;
424 if (clock < mmc->cfg->f_min)
425 clock = mmc->cfg->f_min;
427 if (sdhc_clk / 16 > clock) {
428 for (pre_div = 2; pre_div < 256; pre_div *= 2)
429 if ((sdhc_clk / pre_div) <= (clock * 16))
434 for (div = 1; div <= 16; div++)
435 if ((sdhc_clk / (div * pre_div)) <= clock)
441 clk = (pre_div << 8) | (div << 4);
443 esdhc_clrbits32(®s->sysctl, SYSCTL_CKEN);
445 esdhc_clrsetbits32(®s->sysctl, SYSCTL_CLOCK_MASK, clk);
449 clk = SYSCTL_PEREN | SYSCTL_CKEN;
451 esdhc_setbits32(®s->sysctl, clk);
454 static void esdhc_set_ios(struct mmc *mmc)
456 struct fsl_esdhc_cfg *cfg = mmc->priv;
457 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
459 /* Set the clock speed */
460 set_sysctl(mmc, mmc->clock);
462 /* Set the bus width */
463 esdhc_clrbits32(®s->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
465 if (mmc->bus_width == 4)
466 esdhc_setbits32(®s->proctl, PROCTL_DTW_4);
467 else if (mmc->bus_width == 8)
468 esdhc_setbits32(®s->proctl, PROCTL_DTW_8);
472 static int esdhc_init(struct mmc *mmc)
474 struct fsl_esdhc_cfg *cfg = mmc->priv;
475 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
478 /* Reset the entire host controller */
479 esdhc_setbits32(®s->sysctl, SYSCTL_RSTA);
481 /* Wait until the controller is available */
482 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout)
486 /* Enable cache snooping */
487 esdhc_write32(®s->scr, 0x00000040);
490 esdhc_setbits32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
492 /* Set the initial clock speed */
493 mmc_set_clock(mmc, 400000);
495 /* Disable the BRR and BWR bits in IRQSTAT */
496 esdhc_clrbits32(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
498 /* Put the PROCTL reg back to the default */
499 esdhc_write32(®s->proctl, PROCTL_INIT);
501 /* Set timout to the maximum value */
502 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16);
507 static int esdhc_getcd(struct mmc *mmc)
509 struct fsl_esdhc_cfg *cfg = mmc->priv;
510 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
513 #ifdef CONFIG_ESDHC_DETECT_QUIRK
514 if (CONFIG_ESDHC_DETECT_QUIRK)
517 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_CINS) && --timeout)
523 static void esdhc_reset(struct fsl_esdhc *regs)
525 unsigned long timeout = 100; /* wait max 100 ms */
527 /* reset the controller */
528 esdhc_setbits32(®s->sysctl, SYSCTL_RSTA);
530 /* hardware clears the bit when it is done */
531 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout)
534 printf("MMC/SD: Reset never completed.\n");
537 static const struct mmc_ops esdhc_ops = {
538 .send_cmd = esdhc_send_cmd,
539 .set_ios = esdhc_set_ios,
541 .getcd = esdhc_getcd,
544 int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
546 struct fsl_esdhc *regs;
548 u32 caps, voltage_caps;
553 regs = (struct fsl_esdhc *)cfg->esdhc_base;
555 /* First reset the eSDHC controller */
558 esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN
559 | SYSCTL_IPGEN | SYSCTL_CKEN);
561 memset(&cfg->cfg, 0, sizeof(cfg->cfg));
564 caps = esdhc_read32(®s->hostcapblt);
566 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135
567 caps = caps & ~(ESDHC_HOSTCAPBLT_SRS |
568 ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30);
571 /* T4240 host controller capabilities register should have VS33 bit */
572 #ifdef CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
573 caps = caps | ESDHC_HOSTCAPBLT_VS33;
576 if (caps & ESDHC_HOSTCAPBLT_VS18)
577 voltage_caps |= MMC_VDD_165_195;
578 if (caps & ESDHC_HOSTCAPBLT_VS30)
579 voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31;
580 if (caps & ESDHC_HOSTCAPBLT_VS33)
581 voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34;
583 cfg->cfg.name = "FSL_SDHC";
584 cfg->cfg.ops = &esdhc_ops;
585 #ifdef CONFIG_SYS_SD_VOLTAGE
586 cfg->cfg.voltages = CONFIG_SYS_SD_VOLTAGE;
588 cfg->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
590 if ((cfg->cfg.voltages & voltage_caps) == 0) {
591 printf("voltage not supported by controller\n");
595 cfg->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT | MMC_MODE_HC;
597 if (cfg->max_bus_width > 0) {
598 if (cfg->max_bus_width < 8)
599 cfg->cfg.host_caps &= ~MMC_MODE_8BIT;
600 if (cfg->max_bus_width < 4)
601 cfg->cfg.host_caps &= ~MMC_MODE_4BIT;
604 if (caps & ESDHC_HOSTCAPBLT_HSS)
605 cfg->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
607 #ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK
608 if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK)
609 cfg->cfg.host_caps &= ~MMC_MODE_8BIT;
612 cfg->cfg.f_min = 400000;
613 cfg->cfg.f_max = min(cfg->sdhc_clk, 52000000);
615 cfg->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
617 mmc = mmc_create(&cfg->cfg, cfg);
624 int fsl_esdhc_mmc_init(bd_t *bis)
626 struct fsl_esdhc_cfg *cfg;
628 cfg = calloc(sizeof(struct fsl_esdhc_cfg), 1);
629 cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
630 cfg->sdhc_clk = gd->arch.sdhc_clk;
631 return fsl_esdhc_initialize(bis, cfg);
634 #ifdef CONFIG_OF_LIBFDT
635 void fdt_fixup_esdhc(void *blob, bd_t *bd)
637 const char *compat = "fsl,esdhc";
639 #ifdef CONFIG_FSL_ESDHC_PIN_MUX
640 if (!hwconfig("esdhc")) {
641 do_fixup_by_compat(blob, compat, "status", "disabled",
647 do_fixup_by_compat_u32(blob, compat, "clock-frequency",
648 gd->arch.sdhc_clk, 1);
650 do_fixup_by_compat(blob, compat, "status", "okay",