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+
19 #include <power/regulator.h>
21 #include <fsl_esdhc.h>
22 #include <fdt_support.h>
25 #include <asm-generic/gpio.h>
27 DECLARE_GLOBAL_DATA_PTR;
29 #define SDHCI_IRQ_EN_BITS (IRQSTATEN_CC | IRQSTATEN_TC | \
31 IRQSTATEN_CTOE | IRQSTATEN_CCE | IRQSTATEN_CEBE | \
32 IRQSTATEN_CIE | IRQSTATEN_DTOE | IRQSTATEN_DCE | \
33 IRQSTATEN_DEBE | IRQSTATEN_BRR | IRQSTATEN_BWR | \
37 uint dsaddr; /* SDMA system address register */
38 uint blkattr; /* Block attributes register */
39 uint cmdarg; /* Command argument register */
40 uint xfertyp; /* Transfer type register */
41 uint cmdrsp0; /* Command response 0 register */
42 uint cmdrsp1; /* Command response 1 register */
43 uint cmdrsp2; /* Command response 2 register */
44 uint cmdrsp3; /* Command response 3 register */
45 uint datport; /* Buffer data port register */
46 uint prsstat; /* Present state register */
47 uint proctl; /* Protocol control register */
48 uint sysctl; /* System Control Register */
49 uint irqstat; /* Interrupt status register */
50 uint irqstaten; /* Interrupt status enable register */
51 uint irqsigen; /* Interrupt signal enable register */
52 uint autoc12err; /* Auto CMD error status register */
53 uint hostcapblt; /* Host controller capabilities register */
54 uint wml; /* Watermark level register */
55 uint mixctrl; /* For USDHC */
56 char reserved1[4]; /* reserved */
57 uint fevt; /* Force event register */
58 uint admaes; /* ADMA error status register */
59 uint adsaddr; /* ADMA system address register */
63 uint clktunectrlstatus;
69 uint hostver; /* Host controller version register */
70 char reserved5[4]; /* reserved */
71 uint dmaerraddr; /* DMA error address register */
72 char reserved6[4]; /* reserved */
73 uint dmaerrattr; /* DMA error attribute register */
74 char reserved7[4]; /* reserved */
75 uint hostcapblt2; /* Host controller capabilities register 2 */
76 char reserved8[8]; /* reserved */
77 uint tcr; /* Tuning control register */
78 char reserved9[28]; /* reserved */
79 uint sddirctl; /* SD direction control register */
80 char reserved10[712];/* reserved */
81 uint scr; /* eSDHC control register */
85 * struct fsl_esdhc_priv
87 * @esdhc_regs: registers of the sdhc controller
88 * @sdhc_clk: Current clk of the sdhc controller
89 * @bus_width: bus width, 1bit, 4bit or 8bit
92 * Following is used when Driver Model is enabled for MMC
93 * @dev: pointer for the device
94 * @non_removable: 0: removable; 1: non-removable
95 * @wp_enable: 1: enable checking wp; 0: no check
96 * @vs18_enable: 1: use 1.8V voltage; 0: use 3.3V
97 * @cd_gpio: gpio for card detection
98 * @wp_gpio: gpio for write protection
100 struct fsl_esdhc_priv {
101 struct fsl_esdhc *esdhc_regs;
102 unsigned int sdhc_clk;
103 unsigned int bus_width;
104 struct mmc_config cfg;
110 #ifdef CONFIG_DM_GPIO
111 struct gpio_desc cd_gpio;
112 struct gpio_desc wp_gpio;
116 /* Return the XFERTYP flags for a given command and data packet */
117 static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
122 xfertyp |= XFERTYP_DPSEL;
123 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
124 xfertyp |= XFERTYP_DMAEN;
126 if (data->blocks > 1) {
127 xfertyp |= XFERTYP_MSBSEL;
128 xfertyp |= XFERTYP_BCEN;
129 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
130 xfertyp |= XFERTYP_AC12EN;
134 if (data->flags & MMC_DATA_READ)
135 xfertyp |= XFERTYP_DTDSEL;
138 if (cmd->resp_type & MMC_RSP_CRC)
139 xfertyp |= XFERTYP_CCCEN;
140 if (cmd->resp_type & MMC_RSP_OPCODE)
141 xfertyp |= XFERTYP_CICEN;
142 if (cmd->resp_type & MMC_RSP_136)
143 xfertyp |= XFERTYP_RSPTYP_136;
144 else if (cmd->resp_type & MMC_RSP_BUSY)
145 xfertyp |= XFERTYP_RSPTYP_48_BUSY;
146 else if (cmd->resp_type & MMC_RSP_PRESENT)
147 xfertyp |= XFERTYP_RSPTYP_48;
149 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
150 xfertyp |= XFERTYP_CMDTYP_ABORT;
152 return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
155 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
157 * PIO Read/Write Mode reduce the performace as DMA is not used in this mode.
159 static void esdhc_pio_read_write(struct fsl_esdhc_priv *priv,
160 struct mmc_data *data)
162 struct fsl_esdhc *regs = priv->esdhc_regs;
170 if (data->flags & MMC_DATA_READ) {
171 blocks = data->blocks;
174 timeout = PIO_TIMEOUT;
175 size = data->blocksize;
176 irqstat = esdhc_read32(®s->irqstat);
177 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BREN)
180 printf("\nData Read Failed in PIO Mode.");
183 while (size && (!(irqstat & IRQSTAT_TC))) {
184 udelay(100); /* Wait before last byte transfer complete */
185 irqstat = esdhc_read32(®s->irqstat);
186 databuf = in_le32(®s->datport);
187 *((uint *)buffer) = databuf;
194 blocks = data->blocks;
195 buffer = (char *)data->src;
197 timeout = PIO_TIMEOUT;
198 size = data->blocksize;
199 irqstat = esdhc_read32(®s->irqstat);
200 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BWEN)
203 printf("\nData Write Failed in PIO Mode.");
206 while (size && (!(irqstat & IRQSTAT_TC))) {
207 udelay(100); /* Wait before last byte transfer complete */
208 databuf = *((uint *)buffer);
211 irqstat = esdhc_read32(®s->irqstat);
212 out_le32(®s->datport, databuf);
220 static int esdhc_setup_data(struct fsl_esdhc_priv *priv, struct mmc *mmc,
221 struct mmc_data *data)
224 struct fsl_esdhc *regs = priv->esdhc_regs;
225 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
230 wml_value = data->blocksize/4;
232 if (data->flags & MMC_DATA_READ) {
233 if (wml_value > WML_RD_WML_MAX)
234 wml_value = WML_RD_WML_MAX_VAL;
236 esdhc_clrsetbits32(®s->wml, WML_RD_WML_MASK, wml_value);
237 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
238 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
239 addr = virt_to_phys((void *)(data->dest));
240 if (upper_32_bits(addr))
241 printf("Error found for upper 32 bits\n");
243 esdhc_write32(®s->dsaddr, lower_32_bits(addr));
245 esdhc_write32(®s->dsaddr, (u32)data->dest);
249 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
250 flush_dcache_range((ulong)data->src,
251 (ulong)data->src+data->blocks
254 if (wml_value > WML_WR_WML_MAX)
255 wml_value = WML_WR_WML_MAX_VAL;
256 if (priv->wp_enable) {
257 if ((esdhc_read32(®s->prsstat) &
258 PRSSTAT_WPSPL) == 0) {
259 printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
264 esdhc_clrsetbits32(®s->wml, WML_WR_WML_MASK,
266 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
267 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
268 addr = virt_to_phys((void *)(data->src));
269 if (upper_32_bits(addr))
270 printf("Error found for upper 32 bits\n");
272 esdhc_write32(®s->dsaddr, lower_32_bits(addr));
274 esdhc_write32(®s->dsaddr, (u32)data->src);
279 esdhc_write32(®s->blkattr, data->blocks << 16 | data->blocksize);
281 /* Calculate the timeout period for data transactions */
283 * 1)Timeout period = (2^(timeout+13)) SD Clock cycles
284 * 2)Timeout period should be minimum 0.250sec as per SD Card spec
285 * So, Number of SD Clock cycles for 0.25sec should be minimum
286 * (SD Clock/sec * 0.25 sec) SD Clock cycles
287 * = (mmc->clock * 1/4) SD Clock cycles
289 * => (2^(timeout+13)) >= mmc->clock * 1/4
290 * Taking log2 both the sides
291 * => timeout + 13 >= log2(mmc->clock/4)
292 * Rounding up to next power of 2
293 * => timeout + 13 = log2(mmc->clock/4) + 1
294 * => timeout + 13 = fls(mmc->clock/4)
296 * However, the MMC spec "It is strongly recommended for hosts to
297 * implement more than 500ms timeout value even if the card
298 * indicates the 250ms maximum busy length." Even the previous
299 * value of 300ms is known to be insufficient for some cards.
301 * => timeout + 13 = fls(mmc->clock/2)
303 timeout = fls(mmc->clock/2);
312 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC_A001
313 if ((timeout == 4) || (timeout == 8) || (timeout == 12))
317 #ifdef ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE
320 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
325 static void check_and_invalidate_dcache_range
326 (struct mmc_cmd *cmd,
327 struct mmc_data *data) {
330 unsigned size = roundup(ARCH_DMA_MINALIGN,
331 data->blocks*data->blocksize);
332 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
335 addr = virt_to_phys((void *)(data->dest));
336 if (upper_32_bits(addr))
337 printf("Error found for upper 32 bits\n");
339 start = lower_32_bits(addr);
341 start = (unsigned)data->dest;
344 invalidate_dcache_range(start, end);
348 * Sends a command out on the bus. Takes the mmc pointer,
349 * a command pointer, and an optional data pointer.
352 esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
357 struct fsl_esdhc_priv *priv = mmc->priv;
358 struct fsl_esdhc *regs = priv->esdhc_regs;
360 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
361 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
365 esdhc_write32(®s->irqstat, -1);
369 /* Wait for the bus to be idle */
370 while ((esdhc_read32(®s->prsstat) & PRSSTAT_CICHB) ||
371 (esdhc_read32(®s->prsstat) & PRSSTAT_CIDHB))
374 while (esdhc_read32(®s->prsstat) & PRSSTAT_DLA)
377 /* Wait at least 8 SD clock cycles before the next command */
379 * Note: This is way more than 8 cycles, but 1ms seems to
380 * resolve timing issues with some cards
384 /* Set up for a data transfer if we have one */
386 err = esdhc_setup_data(priv, mmc, data);
390 if (data->flags & MMC_DATA_READ)
391 check_and_invalidate_dcache_range(cmd, data);
394 /* Figure out the transfer arguments */
395 xfertyp = esdhc_xfertyp(cmd, data);
398 esdhc_write32(®s->irqsigen, 0);
400 /* Send the command */
401 esdhc_write32(®s->cmdarg, cmd->cmdarg);
402 #if defined(CONFIG_FSL_USDHC)
403 esdhc_write32(®s->mixctrl,
404 (esdhc_read32(®s->mixctrl) & 0xFFFFFF80) | (xfertyp & 0x7F)
405 | (mmc->ddr_mode ? XFERTYP_DDREN : 0));
406 esdhc_write32(®s->xfertyp, xfertyp & 0xFFFF0000);
408 esdhc_write32(®s->xfertyp, xfertyp);
411 /* Wait for the command to complete */
412 while (!(esdhc_read32(®s->irqstat) & (IRQSTAT_CC | IRQSTAT_CTOE)))
415 irqstat = esdhc_read32(®s->irqstat);
417 if (irqstat & CMD_ERR) {
422 if (irqstat & IRQSTAT_CTOE) {
427 /* Switch voltage to 1.8V if CMD11 succeeded */
428 if (cmd->cmdidx == SD_CMD_SWITCH_UHS18V) {
429 esdhc_setbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT);
431 printf("Run CMD11 1.8V switch\n");
432 /* Sleep for 5 ms - max time for card to switch to 1.8V */
436 /* Workaround for ESDHC errata ENGcm03648 */
437 if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
440 /* Poll on DATA0 line for cmd with busy signal for 600 ms */
441 while (timeout > 0 && !(esdhc_read32(®s->prsstat) &
448 printf("Timeout waiting for DAT0 to go high!\n");
454 /* Copy the response to the response buffer */
455 if (cmd->resp_type & MMC_RSP_136) {
456 u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
458 cmdrsp3 = esdhc_read32(®s->cmdrsp3);
459 cmdrsp2 = esdhc_read32(®s->cmdrsp2);
460 cmdrsp1 = esdhc_read32(®s->cmdrsp1);
461 cmdrsp0 = esdhc_read32(®s->cmdrsp0);
462 cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
463 cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
464 cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
465 cmd->response[3] = (cmdrsp0 << 8);
467 cmd->response[0] = esdhc_read32(®s->cmdrsp0);
469 /* Wait until all of the blocks are transferred */
471 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
472 esdhc_pio_read_write(priv, data);
475 irqstat = esdhc_read32(®s->irqstat);
477 if (irqstat & IRQSTAT_DTOE) {
482 if (irqstat & DATA_ERR) {
486 } while ((irqstat & DATA_COMPLETE) != DATA_COMPLETE);
489 * Need invalidate the dcache here again to avoid any
490 * cache-fill during the DMA operations such as the
491 * speculative pre-fetching etc.
493 if (data->flags & MMC_DATA_READ)
494 check_and_invalidate_dcache_range(cmd, data);
499 /* Reset CMD and DATA portions on error */
501 esdhc_write32(®s->sysctl, esdhc_read32(®s->sysctl) |
503 while (esdhc_read32(®s->sysctl) & SYSCTL_RSTC)
507 esdhc_write32(®s->sysctl,
508 esdhc_read32(®s->sysctl) |
510 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTD))
514 /* If this was CMD11, then notify that power cycle is needed */
515 if (cmd->cmdidx == SD_CMD_SWITCH_UHS18V)
516 printf("CMD11 to switch to 1.8V mode failed, card requires power cycle.\n");
519 esdhc_write32(®s->irqstat, -1);
524 static void set_sysctl(struct fsl_esdhc_priv *priv, struct mmc *mmc, uint clock)
532 int ddr_pre_div = mmc->ddr_mode ? 2 : 1;
533 struct fsl_esdhc *regs = priv->esdhc_regs;
534 int sdhc_clk = priv->sdhc_clk;
537 if (clock < mmc->cfg->f_min)
538 clock = mmc->cfg->f_min;
540 while (sdhc_clk / (16 * pre_div * ddr_pre_div) > clock && pre_div < 256)
543 while (sdhc_clk / (div * pre_div * ddr_pre_div) > clock && div < 16)
549 clk = (pre_div << 8) | (div << 4);
551 #ifdef CONFIG_FSL_USDHC
552 esdhc_clrbits32(®s->vendorspec, VENDORSPEC_CKEN);
554 esdhc_clrbits32(®s->sysctl, SYSCTL_CKEN);
557 esdhc_clrsetbits32(®s->sysctl, SYSCTL_CLOCK_MASK, clk);
561 #ifdef CONFIG_FSL_USDHC
562 esdhc_setbits32(®s->vendorspec, VENDORSPEC_PEREN | VENDORSPEC_CKEN);
564 esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_CKEN);
569 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
570 static void esdhc_clock_control(struct fsl_esdhc_priv *priv, bool enable)
572 struct fsl_esdhc *regs = priv->esdhc_regs;
576 value = esdhc_read32(®s->sysctl);
579 value |= SYSCTL_CKEN;
581 value &= ~SYSCTL_CKEN;
583 esdhc_write32(®s->sysctl, value);
586 value = PRSSTAT_SDSTB;
587 while (!(esdhc_read32(®s->prsstat) & value)) {
589 printf("fsl_esdhc: Internal clock never stabilised.\n");
598 static int esdhc_set_ios(struct mmc *mmc)
600 struct fsl_esdhc_priv *priv = mmc->priv;
601 struct fsl_esdhc *regs = priv->esdhc_regs;
603 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
604 /* Select to use peripheral clock */
605 esdhc_clock_control(priv, false);
606 esdhc_setbits32(®s->scr, ESDHCCTL_PCS);
607 esdhc_clock_control(priv, true);
609 /* Set the clock speed */
610 set_sysctl(priv, mmc, mmc->clock);
612 /* Set the bus width */
613 esdhc_clrbits32(®s->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
615 if (mmc->bus_width == 4)
616 esdhc_setbits32(®s->proctl, PROCTL_DTW_4);
617 else if (mmc->bus_width == 8)
618 esdhc_setbits32(®s->proctl, PROCTL_DTW_8);
623 static int esdhc_init(struct mmc *mmc)
625 struct fsl_esdhc_priv *priv = mmc->priv;
626 struct fsl_esdhc *regs = priv->esdhc_regs;
629 /* Reset the entire host controller */
630 esdhc_setbits32(®s->sysctl, SYSCTL_RSTA);
632 /* Wait until the controller is available */
633 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout)
636 #if defined(CONFIG_FSL_USDHC)
637 /* RSTA doesn't reset MMC_BOOT register, so manually reset it */
638 esdhc_write32(®s->mmcboot, 0x0);
639 /* Reset MIX_CTRL and CLK_TUNE_CTRL_STATUS regs to 0 */
640 esdhc_write32(®s->mixctrl, 0x0);
641 esdhc_write32(®s->clktunectrlstatus, 0x0);
643 /* Put VEND_SPEC to default value */
644 esdhc_write32(®s->vendorspec, VENDORSPEC_INIT);
646 /* Disable DLL_CTRL delay line */
647 esdhc_write32(®s->dllctrl, 0x0);
651 /* Enable cache snooping */
652 esdhc_write32(®s->scr, 0x00000040);
655 #ifndef CONFIG_FSL_USDHC
656 esdhc_setbits32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
658 esdhc_setbits32(®s->vendorspec, VENDORSPEC_HCKEN | VENDORSPEC_IPGEN);
661 /* Set the initial clock speed */
662 mmc_set_clock(mmc, 400000);
664 /* Disable the BRR and BWR bits in IRQSTAT */
665 esdhc_clrbits32(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
667 /* Put the PROCTL reg back to the default */
668 esdhc_write32(®s->proctl, PROCTL_INIT);
670 /* Set timout to the maximum value */
671 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16);
673 if (priv->vs18_enable)
674 esdhc_setbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT);
679 static int esdhc_getcd(struct mmc *mmc)
681 struct fsl_esdhc_priv *priv = mmc->priv;
682 struct fsl_esdhc *regs = priv->esdhc_regs;
685 #ifdef CONFIG_ESDHC_DETECT_QUIRK
686 if (CONFIG_ESDHC_DETECT_QUIRK)
691 if (priv->non_removable)
693 #ifdef CONFIG_DM_GPIO
694 if (dm_gpio_is_valid(&priv->cd_gpio))
695 return dm_gpio_get_value(&priv->cd_gpio);
699 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_CINS) && --timeout)
705 static void esdhc_reset(struct fsl_esdhc *regs)
707 unsigned long timeout = 100; /* wait max 100 ms */
709 /* reset the controller */
710 esdhc_setbits32(®s->sysctl, SYSCTL_RSTA);
712 /* hardware clears the bit when it is done */
713 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout)
716 printf("MMC/SD: Reset never completed.\n");
719 static const struct mmc_ops esdhc_ops = {
720 .send_cmd = esdhc_send_cmd,
721 .set_ios = esdhc_set_ios,
723 .getcd = esdhc_getcd,
726 static int fsl_esdhc_init(struct fsl_esdhc_priv *priv)
728 struct fsl_esdhc *regs;
730 u32 caps, voltage_caps;
735 regs = priv->esdhc_regs;
737 /* First reset the eSDHC controller */
740 #ifndef CONFIG_FSL_USDHC
741 esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN
742 | SYSCTL_IPGEN | SYSCTL_CKEN);
744 esdhc_setbits32(®s->vendorspec, VENDORSPEC_PEREN |
745 VENDORSPEC_HCKEN | VENDORSPEC_IPGEN | VENDORSPEC_CKEN);
748 if (priv->vs18_enable)
749 esdhc_setbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT);
751 writel(SDHCI_IRQ_EN_BITS, ®s->irqstaten);
752 memset(&priv->cfg, 0, sizeof(priv->cfg));
755 caps = esdhc_read32(®s->hostcapblt);
757 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135
758 caps = caps & ~(ESDHC_HOSTCAPBLT_SRS |
759 ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30);
762 /* T4240 host controller capabilities register should have VS33 bit */
763 #ifdef CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
764 caps = caps | ESDHC_HOSTCAPBLT_VS33;
767 if (caps & ESDHC_HOSTCAPBLT_VS18)
768 voltage_caps |= MMC_VDD_165_195;
769 if (caps & ESDHC_HOSTCAPBLT_VS30)
770 voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31;
771 if (caps & ESDHC_HOSTCAPBLT_VS33)
772 voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34;
774 priv->cfg.name = "FSL_SDHC";
775 priv->cfg.ops = &esdhc_ops;
776 #ifdef CONFIG_SYS_SD_VOLTAGE
777 priv->cfg.voltages = CONFIG_SYS_SD_VOLTAGE;
779 priv->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
781 if ((priv->cfg.voltages & voltage_caps) == 0) {
782 printf("voltage not supported by controller\n");
786 if (priv->bus_width == 8)
787 priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
788 else if (priv->bus_width == 4)
789 priv->cfg.host_caps = MMC_MODE_4BIT;
791 priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
792 #ifdef CONFIG_SYS_FSL_ESDHC_HAS_DDR_MODE
793 priv->cfg.host_caps |= MMC_MODE_DDR_52MHz;
796 if (priv->bus_width > 0) {
797 if (priv->bus_width < 8)
798 priv->cfg.host_caps &= ~MMC_MODE_8BIT;
799 if (priv->bus_width < 4)
800 priv->cfg.host_caps &= ~MMC_MODE_4BIT;
803 if (caps & ESDHC_HOSTCAPBLT_HSS)
804 priv->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
806 #ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK
807 if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK)
808 priv->cfg.host_caps &= ~MMC_MODE_8BIT;
811 priv->cfg.f_min = 400000;
812 priv->cfg.f_max = min(priv->sdhc_clk, (u32)52000000);
814 priv->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
816 mmc = mmc_create(&priv->cfg, priv);
825 #ifndef CONFIG_DM_MMC
826 static int fsl_esdhc_cfg_to_priv(struct fsl_esdhc_cfg *cfg,
827 struct fsl_esdhc_priv *priv)
832 priv->esdhc_regs = (struct fsl_esdhc *)(unsigned long)(cfg->esdhc_base);
833 priv->bus_width = cfg->max_bus_width;
834 priv->sdhc_clk = cfg->sdhc_clk;
835 priv->wp_enable = cfg->wp_enable;
836 priv->vs18_enable = cfg->vs18_enable;
841 int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
843 struct fsl_esdhc_priv *priv;
849 priv = calloc(sizeof(struct fsl_esdhc_priv), 1);
853 ret = fsl_esdhc_cfg_to_priv(cfg, priv);
855 debug("%s xlate failure\n", __func__);
860 ret = fsl_esdhc_init(priv);
862 debug("%s init failure\n", __func__);
870 int fsl_esdhc_mmc_init(bd_t *bis)
872 struct fsl_esdhc_cfg *cfg;
874 cfg = calloc(sizeof(struct fsl_esdhc_cfg), 1);
875 cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
876 cfg->sdhc_clk = gd->arch.sdhc_clk;
877 return fsl_esdhc_initialize(bis, cfg);
881 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
882 void mmc_adapter_card_type_ident(void)
887 card_id = QIXIS_READ(present) & QIXIS_SDID_MASK;
888 gd->arch.sdhc_adapter = card_id;
891 case QIXIS_ESDHC_ADAPTER_TYPE_EMMC45:
892 value = QIXIS_READ(brdcfg[5]);
893 value |= (QIXIS_DAT4 | QIXIS_DAT5_6_7);
894 QIXIS_WRITE(brdcfg[5], value);
896 case QIXIS_ESDHC_ADAPTER_TYPE_SDMMC_LEGACY:
897 value = QIXIS_READ(pwr_ctl[1]);
898 value |= QIXIS_EVDD_BY_SDHC_VS;
899 QIXIS_WRITE(pwr_ctl[1], value);
901 case QIXIS_ESDHC_ADAPTER_TYPE_EMMC44:
902 value = QIXIS_READ(brdcfg[5]);
903 value |= (QIXIS_SDCLKIN | QIXIS_SDCLKOUT);
904 QIXIS_WRITE(brdcfg[5], value);
906 case QIXIS_ESDHC_ADAPTER_TYPE_RSV:
908 case QIXIS_ESDHC_ADAPTER_TYPE_MMC:
910 case QIXIS_ESDHC_ADAPTER_TYPE_SD:
912 case QIXIS_ESDHC_NO_ADAPTER:
920 #ifdef CONFIG_OF_LIBFDT
921 __weak int esdhc_status_fixup(void *blob, const char *compat)
923 #ifdef CONFIG_FSL_ESDHC_PIN_MUX
924 if (!hwconfig("esdhc")) {
925 do_fixup_by_compat(blob, compat, "status", "disabled",
926 sizeof("disabled"), 1);
933 void fdt_fixup_esdhc(void *blob, bd_t *bd)
935 const char *compat = "fsl,esdhc";
937 if (esdhc_status_fixup(blob, compat))
940 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
941 do_fixup_by_compat_u32(blob, compat, "peripheral-frequency",
942 gd->arch.sdhc_clk, 1);
944 do_fixup_by_compat_u32(blob, compat, "clock-frequency",
945 gd->arch.sdhc_clk, 1);
947 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
948 do_fixup_by_compat_u32(blob, compat, "adapter-type",
949 (u32)(gd->arch.sdhc_adapter), 1);
955 #include <asm/arch/clock.h>
956 __weak void init_clk_usdhc(u32 index)
960 static int fsl_esdhc_probe(struct udevice *dev)
962 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
963 struct fsl_esdhc_priv *priv = dev_get_priv(dev);
964 const void *fdt = gd->fdt_blob;
965 int node = dev_of_offset(dev);
966 #ifdef CONFIG_DM_REGULATOR
967 struct udevice *vqmmc_dev;
973 addr = devfdt_get_addr(dev);
974 if (addr == FDT_ADDR_T_NONE)
977 priv->esdhc_regs = (struct fsl_esdhc *)addr;
980 val = fdtdec_get_int(fdt, node, "bus-width", -1);
988 if (fdt_get_property(fdt, node, "non-removable", NULL)) {
989 priv->non_removable = 1;
991 priv->non_removable = 0;
992 #ifdef CONFIG_DM_GPIO
993 gpio_request_by_name_nodev(offset_to_ofnode(node), "cd-gpios",
994 0, &priv->cd_gpio, GPIOD_IS_IN);
1000 #ifdef CONFIG_DM_GPIO
1001 ret = gpio_request_by_name_nodev(offset_to_ofnode(node), "wp-gpios", 0,
1002 &priv->wp_gpio, GPIOD_IS_IN);
1004 priv->wp_enable = 0;
1007 priv->vs18_enable = 0;
1009 #ifdef CONFIG_DM_REGULATOR
1011 * If emmc I/O has a fixed voltage at 1.8V, this must be provided,
1012 * otherwise, emmc will work abnormally.
1014 ret = device_get_supply_regulator(dev, "vqmmc-supply", &vqmmc_dev);
1016 dev_dbg(dev, "no vqmmc-supply\n");
1018 ret = regulator_set_enable(vqmmc_dev, true);
1020 dev_err(dev, "fail to enable vqmmc-supply\n");
1024 if (regulator_get_value(vqmmc_dev) == 1800000)
1025 priv->vs18_enable = 1;
1031 * Because lack of clk driver, if SDHC clk is not enabled,
1032 * need to enable it first before this driver is invoked.
1034 * we use MXC_ESDHC_CLK to get clk freq.
1035 * If one would like to make this function work,
1036 * the aliases should be provided in dts as this:
1044 * Then if your board only supports mmc2 and mmc3, but we can
1045 * correctly get the seq as 2 and 3, then let mxc_get_clock
1049 init_clk_usdhc(dev->seq);
1051 priv->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK + dev->seq);
1052 if (priv->sdhc_clk <= 0) {
1053 dev_err(dev, "Unable to get clk for %s\n", dev->name);
1057 ret = fsl_esdhc_init(priv);
1059 dev_err(dev, "fsl_esdhc_init failure\n");
1063 upriv->mmc = priv->mmc;
1064 priv->mmc->dev = dev;
1069 static const struct udevice_id fsl_esdhc_ids[] = {
1070 { .compatible = "fsl,imx6ul-usdhc", },
1071 { .compatible = "fsl,imx6sx-usdhc", },
1072 { .compatible = "fsl,imx6sl-usdhc", },
1073 { .compatible = "fsl,imx6q-usdhc", },
1074 { .compatible = "fsl,imx7d-usdhc", },
1075 { .compatible = "fsl,imx7ulp-usdhc", },
1076 { .compatible = "fsl,esdhc", },
1080 U_BOOT_DRIVER(fsl_esdhc) = {
1081 .name = "fsl-esdhc-mmc",
1083 .of_match = fsl_esdhc_ids,
1084 .probe = fsl_esdhc_probe,
1085 .priv_auto_alloc_size = sizeof(struct fsl_esdhc_priv),