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 */
84 struct fsl_esdhc_plat {
85 struct mmc_config cfg;
90 * struct fsl_esdhc_priv
92 * @esdhc_regs: registers of the sdhc controller
93 * @sdhc_clk: Current clk of the sdhc controller
94 * @bus_width: bus width, 1bit, 4bit or 8bit
97 * Following is used when Driver Model is enabled for MMC
98 * @dev: pointer for the device
99 * @non_removable: 0: removable; 1: non-removable
100 * @wp_enable: 1: enable checking wp; 0: no check
101 * @vs18_enable: 1: use 1.8V voltage; 0: use 3.3V
102 * @cd_gpio: gpio for card detection
103 * @wp_gpio: gpio for write protection
105 struct fsl_esdhc_priv {
106 struct fsl_esdhc *esdhc_regs;
107 unsigned int sdhc_clk;
108 unsigned int bus_width;
109 #if !CONFIG_IS_ENABLED(BLK)
116 #ifdef CONFIG_DM_GPIO
117 struct gpio_desc cd_gpio;
118 struct gpio_desc wp_gpio;
122 /* Return the XFERTYP flags for a given command and data packet */
123 static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
128 xfertyp |= XFERTYP_DPSEL;
129 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
130 xfertyp |= XFERTYP_DMAEN;
132 if (data->blocks > 1) {
133 xfertyp |= XFERTYP_MSBSEL;
134 xfertyp |= XFERTYP_BCEN;
135 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
136 xfertyp |= XFERTYP_AC12EN;
140 if (data->flags & MMC_DATA_READ)
141 xfertyp |= XFERTYP_DTDSEL;
144 if (cmd->resp_type & MMC_RSP_CRC)
145 xfertyp |= XFERTYP_CCCEN;
146 if (cmd->resp_type & MMC_RSP_OPCODE)
147 xfertyp |= XFERTYP_CICEN;
148 if (cmd->resp_type & MMC_RSP_136)
149 xfertyp |= XFERTYP_RSPTYP_136;
150 else if (cmd->resp_type & MMC_RSP_BUSY)
151 xfertyp |= XFERTYP_RSPTYP_48_BUSY;
152 else if (cmd->resp_type & MMC_RSP_PRESENT)
153 xfertyp |= XFERTYP_RSPTYP_48;
155 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
156 xfertyp |= XFERTYP_CMDTYP_ABORT;
158 return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
161 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
163 * PIO Read/Write Mode reduce the performace as DMA is not used in this mode.
165 static void esdhc_pio_read_write(struct fsl_esdhc_priv *priv,
166 struct mmc_data *data)
168 struct fsl_esdhc *regs = priv->esdhc_regs;
176 if (data->flags & MMC_DATA_READ) {
177 blocks = data->blocks;
180 start = get_timer(0);
181 size = data->blocksize;
182 irqstat = esdhc_read32(®s->irqstat);
183 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BREN)) {
184 if (get_timer(start) > PIO_TIMEOUT) {
185 printf("\nData Read Failed in PIO Mode.");
189 while (size && (!(irqstat & IRQSTAT_TC))) {
190 udelay(100); /* Wait before last byte transfer complete */
191 irqstat = esdhc_read32(®s->irqstat);
192 databuf = in_le32(®s->datport);
193 *((uint *)buffer) = databuf;
200 blocks = data->blocks;
201 buffer = (char *)data->src;
203 start = get_timer(0);
204 size = data->blocksize;
205 irqstat = esdhc_read32(®s->irqstat);
206 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BWEN)) {
207 if (get_timer(start) > PIO_TIMEOUT) {
208 printf("\nData Write Failed in PIO Mode.");
212 while (size && (!(irqstat & IRQSTAT_TC))) {
213 udelay(100); /* Wait before last byte transfer complete */
214 databuf = *((uint *)buffer);
217 irqstat = esdhc_read32(®s->irqstat);
218 out_le32(®s->datport, databuf);
226 static int esdhc_setup_data(struct fsl_esdhc_priv *priv, struct mmc *mmc,
227 struct mmc_data *data)
230 struct fsl_esdhc *regs = priv->esdhc_regs;
231 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234) || \
237 wml_value = data->blocksize/4;
239 if (data->flags & MMC_DATA_READ) {
240 if (wml_value > WML_RD_WML_MAX)
241 wml_value = WML_RD_WML_MAX_VAL;
243 esdhc_clrsetbits32(®s->wml, WML_RD_WML_MASK, wml_value);
244 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
245 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234) || \
247 addr = virt_to_phys((void *)(data->dest));
248 if (upper_32_bits(addr))
249 printf("Error found for upper 32 bits\n");
251 esdhc_write32(®s->dsaddr, lower_32_bits(addr));
253 esdhc_write32(®s->dsaddr, (u32)data->dest);
257 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
258 flush_dcache_range((ulong)data->src,
259 (ulong)data->src+data->blocks
262 if (wml_value > WML_WR_WML_MAX)
263 wml_value = WML_WR_WML_MAX_VAL;
264 if (priv->wp_enable) {
265 if ((esdhc_read32(®s->prsstat) &
266 PRSSTAT_WPSPL) == 0) {
267 printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
272 esdhc_clrsetbits32(®s->wml, WML_WR_WML_MASK,
274 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
275 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234) || \
277 addr = virt_to_phys((void *)(data->src));
278 if (upper_32_bits(addr))
279 printf("Error found for upper 32 bits\n");
281 esdhc_write32(®s->dsaddr, lower_32_bits(addr));
283 esdhc_write32(®s->dsaddr, (u32)data->src);
288 esdhc_write32(®s->blkattr, data->blocks << 16 | data->blocksize);
290 /* Calculate the timeout period for data transactions */
292 * 1)Timeout period = (2^(timeout+13)) SD Clock cycles
293 * 2)Timeout period should be minimum 0.250sec as per SD Card spec
294 * So, Number of SD Clock cycles for 0.25sec should be minimum
295 * (SD Clock/sec * 0.25 sec) SD Clock cycles
296 * = (mmc->clock * 1/4) SD Clock cycles
298 * => (2^(timeout+13)) >= mmc->clock * 1/4
299 * Taking log2 both the sides
300 * => timeout + 13 >= log2(mmc->clock/4)
301 * Rounding up to next power of 2
302 * => timeout + 13 = log2(mmc->clock/4) + 1
303 * => timeout + 13 = fls(mmc->clock/4)
305 * However, the MMC spec "It is strongly recommended for hosts to
306 * implement more than 500ms timeout value even if the card
307 * indicates the 250ms maximum busy length." Even the previous
308 * value of 300ms is known to be insufficient for some cards.
310 * => timeout + 13 = fls(mmc->clock/2)
312 timeout = fls(mmc->clock/2);
321 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC_A001
322 if ((timeout == 4) || (timeout == 8) || (timeout == 12))
326 #ifdef ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE
329 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
334 static void check_and_invalidate_dcache_range
335 (struct mmc_cmd *cmd,
336 struct mmc_data *data) {
339 unsigned size = roundup(ARCH_DMA_MINALIGN,
340 data->blocks*data->blocksize);
341 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234) || \
345 addr = virt_to_phys((void *)(data->dest));
346 if (upper_32_bits(addr))
347 printf("Error found for upper 32 bits\n");
349 start = lower_32_bits(addr);
351 start = (unsigned)data->dest;
354 invalidate_dcache_range(start, end);
358 * Sends a command out on the bus. Takes the mmc pointer,
359 * a command pointer, and an optional data pointer.
361 static int esdhc_send_cmd_common(struct fsl_esdhc_priv *priv, struct mmc *mmc,
362 struct mmc_cmd *cmd, struct mmc_data *data)
367 struct fsl_esdhc *regs = priv->esdhc_regs;
369 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
370 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
374 esdhc_write32(®s->irqstat, -1);
378 /* Wait for the bus to be idle */
379 while ((esdhc_read32(®s->prsstat) & PRSSTAT_CICHB) ||
380 (esdhc_read32(®s->prsstat) & PRSSTAT_CIDHB))
383 while (esdhc_read32(®s->prsstat) & PRSSTAT_DLA)
386 /* Wait at least 8 SD clock cycles before the next command */
388 * Note: This is way more than 8 cycles, but 1ms seems to
389 * resolve timing issues with some cards
393 /* Set up for a data transfer if we have one */
395 err = esdhc_setup_data(priv, mmc, data);
399 if (data->flags & MMC_DATA_READ)
400 check_and_invalidate_dcache_range(cmd, data);
403 /* Figure out the transfer arguments */
404 xfertyp = esdhc_xfertyp(cmd, data);
407 esdhc_write32(®s->irqsigen, 0);
409 /* Send the command */
410 esdhc_write32(®s->cmdarg, cmd->cmdarg);
411 #if defined(CONFIG_FSL_USDHC)
412 esdhc_write32(®s->mixctrl,
413 (esdhc_read32(®s->mixctrl) & 0xFFFFFF80) | (xfertyp & 0x7F)
414 | (mmc->ddr_mode ? XFERTYP_DDREN : 0));
415 esdhc_write32(®s->xfertyp, xfertyp & 0xFFFF0000);
417 esdhc_write32(®s->xfertyp, xfertyp);
420 /* Wait for the command to complete */
421 while (!(esdhc_read32(®s->irqstat) & (IRQSTAT_CC | IRQSTAT_CTOE)))
424 irqstat = esdhc_read32(®s->irqstat);
426 if (irqstat & CMD_ERR) {
431 if (irqstat & IRQSTAT_CTOE) {
436 /* Switch voltage to 1.8V if CMD11 succeeded */
437 if (cmd->cmdidx == SD_CMD_SWITCH_UHS18V) {
438 esdhc_setbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT);
440 printf("Run CMD11 1.8V switch\n");
441 /* Sleep for 5 ms - max time for card to switch to 1.8V */
445 /* Workaround for ESDHC errata ENGcm03648 */
446 if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
449 /* Poll on DATA0 line for cmd with busy signal for 600 ms */
450 while (timeout > 0 && !(esdhc_read32(®s->prsstat) &
457 printf("Timeout waiting for DAT0 to go high!\n");
463 /* Copy the response to the response buffer */
464 if (cmd->resp_type & MMC_RSP_136) {
465 u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
467 cmdrsp3 = esdhc_read32(®s->cmdrsp3);
468 cmdrsp2 = esdhc_read32(®s->cmdrsp2);
469 cmdrsp1 = esdhc_read32(®s->cmdrsp1);
470 cmdrsp0 = esdhc_read32(®s->cmdrsp0);
471 cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
472 cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
473 cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
474 cmd->response[3] = (cmdrsp0 << 8);
476 cmd->response[0] = esdhc_read32(®s->cmdrsp0);
478 /* Wait until all of the blocks are transferred */
480 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
481 esdhc_pio_read_write(priv, data);
484 irqstat = esdhc_read32(®s->irqstat);
486 if (irqstat & IRQSTAT_DTOE) {
491 if (irqstat & DATA_ERR) {
495 } while ((irqstat & DATA_COMPLETE) != DATA_COMPLETE);
498 * Need invalidate the dcache here again to avoid any
499 * cache-fill during the DMA operations such as the
500 * speculative pre-fetching etc.
502 if (data->flags & MMC_DATA_READ)
503 check_and_invalidate_dcache_range(cmd, data);
508 /* Reset CMD and DATA portions on error */
510 esdhc_write32(®s->sysctl, esdhc_read32(®s->sysctl) |
512 while (esdhc_read32(®s->sysctl) & SYSCTL_RSTC)
516 esdhc_write32(®s->sysctl,
517 esdhc_read32(®s->sysctl) |
519 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTD))
523 /* If this was CMD11, then notify that power cycle is needed */
524 if (cmd->cmdidx == SD_CMD_SWITCH_UHS18V)
525 printf("CMD11 to switch to 1.8V mode failed, card requires power cycle.\n");
528 esdhc_write32(®s->irqstat, -1);
533 static void set_sysctl(struct fsl_esdhc_priv *priv, struct mmc *mmc, uint clock)
535 struct fsl_esdhc *regs = priv->esdhc_regs;
539 /* For i.MX53 eSDHCv3, SYSCTL.SDCLKFS may not be set to 0. */
540 int pre_div = (regs == (struct fsl_esdhc *)MMC_SDHC3_BASE_ADDR) ? 2 : 1;
547 int ddr_pre_div = mmc->ddr_mode ? 2 : 1;
548 int sdhc_clk = priv->sdhc_clk;
551 if (clock < mmc->cfg->f_min)
552 clock = mmc->cfg->f_min;
554 while (sdhc_clk / (16 * pre_div * ddr_pre_div) > clock && pre_div < 256)
557 while (sdhc_clk / (div * pre_div * ddr_pre_div) > clock && div < 16)
563 clk = (pre_div << 8) | (div << 4);
565 #ifdef CONFIG_FSL_USDHC
566 esdhc_clrbits32(®s->vendorspec, VENDORSPEC_CKEN);
568 esdhc_clrbits32(®s->sysctl, SYSCTL_CKEN);
571 esdhc_clrsetbits32(®s->sysctl, SYSCTL_CLOCK_MASK, clk);
575 #ifdef CONFIG_FSL_USDHC
576 esdhc_setbits32(®s->vendorspec, VENDORSPEC_PEREN | VENDORSPEC_CKEN);
578 esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_CKEN);
583 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
584 static void esdhc_clock_control(struct fsl_esdhc_priv *priv, bool enable)
586 struct fsl_esdhc *regs = priv->esdhc_regs;
590 value = esdhc_read32(®s->sysctl);
593 value |= SYSCTL_CKEN;
595 value &= ~SYSCTL_CKEN;
597 esdhc_write32(®s->sysctl, value);
600 value = PRSSTAT_SDSTB;
601 while (!(esdhc_read32(®s->prsstat) & value)) {
603 printf("fsl_esdhc: Internal clock never stabilised.\n");
612 static int esdhc_set_ios_common(struct fsl_esdhc_priv *priv, struct mmc *mmc)
614 struct fsl_esdhc *regs = priv->esdhc_regs;
616 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
617 /* Select to use peripheral clock */
618 esdhc_clock_control(priv, false);
619 esdhc_setbits32(®s->scr, ESDHCCTL_PCS);
620 esdhc_clock_control(priv, true);
622 /* Set the clock speed */
623 set_sysctl(priv, mmc, mmc->clock);
625 /* Set the bus width */
626 esdhc_clrbits32(®s->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
628 if (mmc->bus_width == 4)
629 esdhc_setbits32(®s->proctl, PROCTL_DTW_4);
630 else if (mmc->bus_width == 8)
631 esdhc_setbits32(®s->proctl, PROCTL_DTW_8);
636 static int esdhc_init_common(struct fsl_esdhc_priv *priv, struct mmc *mmc)
638 struct fsl_esdhc *regs = priv->esdhc_regs;
641 /* Reset the entire host controller */
642 esdhc_setbits32(®s->sysctl, SYSCTL_RSTA);
644 /* Wait until the controller is available */
645 start = get_timer(0);
646 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA)) {
647 if (get_timer(start) > 1000)
651 #if defined(CONFIG_FSL_USDHC)
652 /* RSTA doesn't reset MMC_BOOT register, so manually reset it */
653 esdhc_write32(®s->mmcboot, 0x0);
654 /* Reset MIX_CTRL and CLK_TUNE_CTRL_STATUS regs to 0 */
655 esdhc_write32(®s->mixctrl, 0x0);
656 esdhc_write32(®s->clktunectrlstatus, 0x0);
658 /* Put VEND_SPEC to default value */
659 if (priv->vs18_enable)
660 esdhc_write32(®s->vendorspec, (VENDORSPEC_INIT |
661 ESDHC_VENDORSPEC_VSELECT));
663 esdhc_write32(®s->vendorspec, VENDORSPEC_INIT);
665 /* Disable DLL_CTRL delay line */
666 esdhc_write32(®s->dllctrl, 0x0);
670 /* Enable cache snooping */
671 esdhc_write32(®s->scr, 0x00000040);
674 #ifndef CONFIG_FSL_USDHC
675 esdhc_setbits32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
677 esdhc_setbits32(®s->vendorspec, VENDORSPEC_HCKEN | VENDORSPEC_IPGEN);
680 /* Set the initial clock speed */
681 mmc_set_clock(mmc, 400000, false);
683 /* Disable the BRR and BWR bits in IRQSTAT */
684 esdhc_clrbits32(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
686 /* Put the PROCTL reg back to the default */
687 esdhc_write32(®s->proctl, PROCTL_INIT);
689 /* Set timout to the maximum value */
690 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16);
695 static int esdhc_getcd_common(struct fsl_esdhc_priv *priv)
697 struct fsl_esdhc *regs = priv->esdhc_regs;
700 #ifdef CONFIG_ESDHC_DETECT_QUIRK
701 if (CONFIG_ESDHC_DETECT_QUIRK)
705 #if CONFIG_IS_ENABLED(DM_MMC)
706 if (priv->non_removable)
708 #ifdef CONFIG_DM_GPIO
709 if (dm_gpio_is_valid(&priv->cd_gpio))
710 return dm_gpio_get_value(&priv->cd_gpio);
714 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_CINS) && --timeout)
720 static int esdhc_reset(struct fsl_esdhc *regs)
724 /* reset the controller */
725 esdhc_setbits32(®s->sysctl, SYSCTL_RSTA);
727 /* hardware clears the bit when it is done */
728 start = get_timer(0);
729 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA)) {
730 if (get_timer(start) > 100) {
731 printf("MMC/SD: Reset never completed.\n");
739 #if !CONFIG_IS_ENABLED(DM_MMC)
740 static int esdhc_getcd(struct mmc *mmc)
742 struct fsl_esdhc_priv *priv = mmc->priv;
744 return esdhc_getcd_common(priv);
747 static int esdhc_init(struct mmc *mmc)
749 struct fsl_esdhc_priv *priv = mmc->priv;
751 return esdhc_init_common(priv, mmc);
754 static int esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
755 struct mmc_data *data)
757 struct fsl_esdhc_priv *priv = mmc->priv;
759 return esdhc_send_cmd_common(priv, mmc, cmd, data);
762 static int esdhc_set_ios(struct mmc *mmc)
764 struct fsl_esdhc_priv *priv = mmc->priv;
766 return esdhc_set_ios_common(priv, mmc);
769 static const struct mmc_ops esdhc_ops = {
770 .getcd = esdhc_getcd,
772 .send_cmd = esdhc_send_cmd,
773 .set_ios = esdhc_set_ios,
777 static int fsl_esdhc_init(struct fsl_esdhc_priv *priv,
778 struct fsl_esdhc_plat *plat)
780 struct mmc_config *cfg;
781 struct fsl_esdhc *regs;
782 u32 caps, voltage_caps;
788 regs = priv->esdhc_regs;
790 /* First reset the eSDHC controller */
791 ret = esdhc_reset(regs);
795 #ifndef CONFIG_FSL_USDHC
796 esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN
797 | SYSCTL_IPGEN | SYSCTL_CKEN);
799 esdhc_setbits32(®s->vendorspec, VENDORSPEC_PEREN |
800 VENDORSPEC_HCKEN | VENDORSPEC_IPGEN | VENDORSPEC_CKEN);
803 if (priv->vs18_enable)
804 esdhc_setbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT);
806 writel(SDHCI_IRQ_EN_BITS, ®s->irqstaten);
808 #ifndef CONFIG_DM_MMC
809 memset(cfg, '\0', sizeof(*cfg));
813 caps = esdhc_read32(®s->hostcapblt);
815 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135
816 caps = caps & ~(ESDHC_HOSTCAPBLT_SRS |
817 ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30);
820 /* T4240 host controller capabilities register should have VS33 bit */
821 #ifdef CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
822 caps = caps | ESDHC_HOSTCAPBLT_VS33;
825 if (caps & ESDHC_HOSTCAPBLT_VS18)
826 voltage_caps |= MMC_VDD_165_195;
827 if (caps & ESDHC_HOSTCAPBLT_VS30)
828 voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31;
829 if (caps & ESDHC_HOSTCAPBLT_VS33)
830 voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34;
832 cfg->name = "FSL_SDHC";
833 #if !CONFIG_IS_ENABLED(DM_MMC)
834 cfg->ops = &esdhc_ops;
836 #ifdef CONFIG_SYS_SD_VOLTAGE
837 cfg->voltages = CONFIG_SYS_SD_VOLTAGE;
839 cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
841 if ((cfg->voltages & voltage_caps) == 0) {
842 printf("voltage not supported by controller\n");
846 if (priv->bus_width == 8)
847 cfg->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
848 else if (priv->bus_width == 4)
849 cfg->host_caps = MMC_MODE_4BIT;
851 cfg->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
852 #ifdef CONFIG_SYS_FSL_ESDHC_HAS_DDR_MODE
853 cfg->host_caps |= MMC_MODE_DDR_52MHz;
856 if (priv->bus_width > 0) {
857 if (priv->bus_width < 8)
858 cfg->host_caps &= ~MMC_MODE_8BIT;
859 if (priv->bus_width < 4)
860 cfg->host_caps &= ~MMC_MODE_4BIT;
863 if (caps & ESDHC_HOSTCAPBLT_HSS)
864 cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
866 #ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK
867 if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK)
868 cfg->host_caps &= ~MMC_MODE_8BIT;
872 cfg->f_max = min(priv->sdhc_clk, (u32)52000000);
874 cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
879 #if !CONFIG_IS_ENABLED(DM_MMC)
880 static int fsl_esdhc_cfg_to_priv(struct fsl_esdhc_cfg *cfg,
881 struct fsl_esdhc_priv *priv)
886 priv->esdhc_regs = (struct fsl_esdhc *)(unsigned long)(cfg->esdhc_base);
887 priv->bus_width = cfg->max_bus_width;
888 priv->sdhc_clk = cfg->sdhc_clk;
889 priv->wp_enable = cfg->wp_enable;
890 priv->vs18_enable = cfg->vs18_enable;
895 int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
897 struct fsl_esdhc_plat *plat;
898 struct fsl_esdhc_priv *priv;
905 priv = calloc(sizeof(struct fsl_esdhc_priv), 1);
908 plat = calloc(sizeof(struct fsl_esdhc_plat), 1);
914 ret = fsl_esdhc_cfg_to_priv(cfg, priv);
916 debug("%s xlate failure\n", __func__);
922 ret = fsl_esdhc_init(priv, plat);
924 debug("%s init failure\n", __func__);
930 mmc = mmc_create(&plat->cfg, priv);
939 int fsl_esdhc_mmc_init(bd_t *bis)
941 struct fsl_esdhc_cfg *cfg;
943 cfg = calloc(sizeof(struct fsl_esdhc_cfg), 1);
944 cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
945 cfg->sdhc_clk = gd->arch.sdhc_clk;
946 return fsl_esdhc_initialize(bis, cfg);
950 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
951 void mmc_adapter_card_type_ident(void)
956 card_id = QIXIS_READ(present) & QIXIS_SDID_MASK;
957 gd->arch.sdhc_adapter = card_id;
960 case QIXIS_ESDHC_ADAPTER_TYPE_EMMC45:
961 value = QIXIS_READ(brdcfg[5]);
962 value |= (QIXIS_DAT4 | QIXIS_DAT5_6_7);
963 QIXIS_WRITE(brdcfg[5], value);
965 case QIXIS_ESDHC_ADAPTER_TYPE_SDMMC_LEGACY:
966 value = QIXIS_READ(pwr_ctl[1]);
967 value |= QIXIS_EVDD_BY_SDHC_VS;
968 QIXIS_WRITE(pwr_ctl[1], value);
970 case QIXIS_ESDHC_ADAPTER_TYPE_EMMC44:
971 value = QIXIS_READ(brdcfg[5]);
972 value |= (QIXIS_SDCLKIN | QIXIS_SDCLKOUT);
973 QIXIS_WRITE(brdcfg[5], value);
975 case QIXIS_ESDHC_ADAPTER_TYPE_RSV:
977 case QIXIS_ESDHC_ADAPTER_TYPE_MMC:
979 case QIXIS_ESDHC_ADAPTER_TYPE_SD:
981 case QIXIS_ESDHC_NO_ADAPTER:
989 #ifdef CONFIG_OF_LIBFDT
990 __weak int esdhc_status_fixup(void *blob, const char *compat)
992 #ifdef CONFIG_FSL_ESDHC_PIN_MUX
993 if (!hwconfig("esdhc")) {
994 do_fixup_by_compat(blob, compat, "status", "disabled",
995 sizeof("disabled"), 1);
1002 void fdt_fixup_esdhc(void *blob, bd_t *bd)
1004 const char *compat = "fsl,esdhc";
1006 if (esdhc_status_fixup(blob, compat))
1009 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
1010 do_fixup_by_compat_u32(blob, compat, "peripheral-frequency",
1011 gd->arch.sdhc_clk, 1);
1013 do_fixup_by_compat_u32(blob, compat, "clock-frequency",
1014 gd->arch.sdhc_clk, 1);
1016 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
1017 do_fixup_by_compat_u32(blob, compat, "adapter-type",
1018 (u32)(gd->arch.sdhc_adapter), 1);
1023 #if CONFIG_IS_ENABLED(DM_MMC)
1024 #include <asm/arch/clock.h>
1025 __weak void init_clk_usdhc(u32 index)
1029 static int fsl_esdhc_probe(struct udevice *dev)
1031 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
1032 struct fsl_esdhc_plat *plat = dev_get_platdata(dev);
1033 struct fsl_esdhc_priv *priv = dev_get_priv(dev);
1034 #ifdef CONFIG_DM_REGULATOR
1035 struct udevice *vqmmc_dev;
1042 addr = dev_read_addr(dev);
1043 if (addr == FDT_ADDR_T_NONE)
1046 priv->esdhc_regs = (struct fsl_esdhc *)addr;
1049 val = dev_read_u32_default(dev, "bus-width", -1);
1051 priv->bus_width = 8;
1053 priv->bus_width = 4;
1055 priv->bus_width = 1;
1057 if (dev_read_bool(dev, "non-removable")) {
1058 priv->non_removable = 1;
1060 priv->non_removable = 0;
1061 #ifdef CONFIG_DM_GPIO
1062 gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio,
1067 priv->wp_enable = 1;
1069 #ifdef CONFIG_DM_GPIO
1070 ret = gpio_request_by_name(dev, "wp-gpios", 0, &priv->wp_gpio,
1073 priv->wp_enable = 0;
1076 priv->vs18_enable = 0;
1078 #ifdef CONFIG_DM_REGULATOR
1080 * If emmc I/O has a fixed voltage at 1.8V, this must be provided,
1081 * otherwise, emmc will work abnormally.
1083 ret = device_get_supply_regulator(dev, "vqmmc-supply", &vqmmc_dev);
1085 dev_dbg(dev, "no vqmmc-supply\n");
1087 ret = regulator_set_enable(vqmmc_dev, true);
1089 dev_err(dev, "fail to enable vqmmc-supply\n");
1093 if (regulator_get_value(vqmmc_dev) == 1800000)
1094 priv->vs18_enable = 1;
1100 * Because lack of clk driver, if SDHC clk is not enabled,
1101 * need to enable it first before this driver is invoked.
1103 * we use MXC_ESDHC_CLK to get clk freq.
1104 * If one would like to make this function work,
1105 * the aliases should be provided in dts as this:
1113 * Then if your board only supports mmc2 and mmc3, but we can
1114 * correctly get the seq as 2 and 3, then let mxc_get_clock
1118 init_clk_usdhc(dev->seq);
1120 priv->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK + dev->seq);
1121 if (priv->sdhc_clk <= 0) {
1122 dev_err(dev, "Unable to get clk for %s\n", dev->name);
1126 ret = fsl_esdhc_init(priv, plat);
1128 dev_err(dev, "fsl_esdhc_init failure\n");
1133 mmc->cfg = &plat->cfg;
1137 return esdhc_init_common(priv, mmc);
1140 #if CONFIG_IS_ENABLED(DM_MMC)
1141 static int fsl_esdhc_get_cd(struct udevice *dev)
1143 struct fsl_esdhc_priv *priv = dev_get_priv(dev);
1146 return esdhc_getcd_common(priv);
1149 static int fsl_esdhc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
1150 struct mmc_data *data)
1152 struct fsl_esdhc_plat *plat = dev_get_platdata(dev);
1153 struct fsl_esdhc_priv *priv = dev_get_priv(dev);
1155 return esdhc_send_cmd_common(priv, &plat->mmc, cmd, data);
1158 static int fsl_esdhc_set_ios(struct udevice *dev)
1160 struct fsl_esdhc_plat *plat = dev_get_platdata(dev);
1161 struct fsl_esdhc_priv *priv = dev_get_priv(dev);
1163 return esdhc_set_ios_common(priv, &plat->mmc);
1166 static const struct dm_mmc_ops fsl_esdhc_ops = {
1167 .get_cd = fsl_esdhc_get_cd,
1168 .send_cmd = fsl_esdhc_send_cmd,
1169 .set_ios = fsl_esdhc_set_ios,
1173 static const struct udevice_id fsl_esdhc_ids[] = {
1174 { .compatible = "fsl,imx6ul-usdhc", },
1175 { .compatible = "fsl,imx6sx-usdhc", },
1176 { .compatible = "fsl,imx6sl-usdhc", },
1177 { .compatible = "fsl,imx6q-usdhc", },
1178 { .compatible = "fsl,imx7d-usdhc", },
1179 { .compatible = "fsl,imx7ulp-usdhc", },
1180 { .compatible = "fsl,esdhc", },
1184 #if CONFIG_IS_ENABLED(BLK)
1185 static int fsl_esdhc_bind(struct udevice *dev)
1187 struct fsl_esdhc_plat *plat = dev_get_platdata(dev);
1189 return mmc_bind(dev, &plat->mmc, &plat->cfg);
1193 U_BOOT_DRIVER(fsl_esdhc) = {
1194 .name = "fsl-esdhc-mmc",
1196 .of_match = fsl_esdhc_ids,
1197 .ops = &fsl_esdhc_ops,
1198 #if CONFIG_IS_ENABLED(BLK)
1199 .bind = fsl_esdhc_bind,
1201 .probe = fsl_esdhc_probe,
1202 .platdata_auto_alloc_size = sizeof(struct fsl_esdhc_plat),
1203 .priv_auto_alloc_size = sizeof(struct fsl_esdhc_priv),