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;
26 #define SDHCI_IRQ_EN_BITS (IRQSTATEN_CC | IRQSTATEN_TC | \
28 IRQSTATEN_CTOE | IRQSTATEN_CCE | IRQSTATEN_CEBE | \
29 IRQSTATEN_CIE | IRQSTATEN_DTOE | IRQSTATEN_DCE | \
30 IRQSTATEN_DEBE | IRQSTATEN_BRR | IRQSTATEN_BWR | \
34 uint dsaddr; /* SDMA system address register */
35 uint blkattr; /* Block attributes register */
36 uint cmdarg; /* Command argument register */
37 uint xfertyp; /* Transfer type register */
38 uint cmdrsp0; /* Command response 0 register */
39 uint cmdrsp1; /* Command response 1 register */
40 uint cmdrsp2; /* Command response 2 register */
41 uint cmdrsp3; /* Command response 3 register */
42 uint datport; /* Buffer data port register */
43 uint prsstat; /* Present state register */
44 uint proctl; /* Protocol control register */
45 uint sysctl; /* System Control Register */
46 uint irqstat; /* Interrupt status register */
47 uint irqstaten; /* Interrupt status enable register */
48 uint irqsigen; /* Interrupt signal enable register */
49 uint autoc12err; /* Auto CMD error status register */
50 uint hostcapblt; /* Host controller capabilities register */
51 uint wml; /* Watermark level register */
52 uint mixctrl; /* For USDHC */
53 char reserved1[4]; /* reserved */
54 uint fevt; /* Force event register */
55 uint admaes; /* ADMA error status register */
56 uint adsaddr; /* ADMA system address register */
57 char reserved2[160]; /* reserved */
58 uint hostver; /* Host controller version register */
59 char reserved3[4]; /* reserved */
60 uint dmaerraddr; /* DMA error address register */
61 char reserved4[4]; /* reserved */
62 uint dmaerrattr; /* DMA error attribute register */
63 char reserved5[4]; /* reserved */
64 uint hostcapblt2; /* Host controller capabilities register 2 */
65 char reserved6[8]; /* reserved */
66 uint tcr; /* Tuning control register */
67 char reserved7[28]; /* reserved */
68 uint sddirctl; /* SD direction control register */
69 char reserved8[712]; /* reserved */
70 uint scr; /* eSDHC control register */
73 /* Return the XFERTYP flags for a given command and data packet */
74 static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
79 xfertyp |= XFERTYP_DPSEL;
80 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
81 xfertyp |= XFERTYP_DMAEN;
83 if (data->blocks > 1) {
84 xfertyp |= XFERTYP_MSBSEL;
85 xfertyp |= XFERTYP_BCEN;
86 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
87 xfertyp |= XFERTYP_AC12EN;
91 if (data->flags & MMC_DATA_READ)
92 xfertyp |= XFERTYP_DTDSEL;
95 if (cmd->resp_type & MMC_RSP_CRC)
96 xfertyp |= XFERTYP_CCCEN;
97 if (cmd->resp_type & MMC_RSP_OPCODE)
98 xfertyp |= XFERTYP_CICEN;
99 if (cmd->resp_type & MMC_RSP_136)
100 xfertyp |= XFERTYP_RSPTYP_136;
101 else if (cmd->resp_type & MMC_RSP_BUSY)
102 xfertyp |= XFERTYP_RSPTYP_48_BUSY;
103 else if (cmd->resp_type & MMC_RSP_PRESENT)
104 xfertyp |= XFERTYP_RSPTYP_48;
106 #if defined(CONFIG_MX53) || defined(CONFIG_PPC_T4240) || defined(CONFIG_LS102XA)
107 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
108 xfertyp |= XFERTYP_CMDTYP_ABORT;
110 return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
113 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
115 * PIO Read/Write Mode reduce the performace as DMA is not used in this mode.
118 esdhc_pio_read_write(struct mmc *mmc, struct mmc_data *data)
120 struct fsl_esdhc_cfg *cfg = mmc->priv;
121 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
129 if (data->flags & MMC_DATA_READ) {
130 blocks = data->blocks;
133 timeout = PIO_TIMEOUT;
134 size = data->blocksize;
135 irqstat = esdhc_read32(®s->irqstat);
136 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BREN)
139 printf("\nData Read Failed in PIO Mode.");
142 while (size && (!(irqstat & IRQSTAT_TC))) {
143 udelay(100); /* Wait before last byte transfer complete */
144 irqstat = esdhc_read32(®s->irqstat);
145 databuf = in_le32(®s->datport);
146 *((uint *)buffer) = databuf;
153 blocks = data->blocks;
154 buffer = (char *)data->src;
156 timeout = PIO_TIMEOUT;
157 size = data->blocksize;
158 irqstat = esdhc_read32(®s->irqstat);
159 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BWEN)
162 printf("\nData Write Failed in PIO Mode.");
165 while (size && (!(irqstat & IRQSTAT_TC))) {
166 udelay(100); /* Wait before last byte transfer complete */
167 databuf = *((uint *)buffer);
170 irqstat = esdhc_read32(®s->irqstat);
171 out_le32(®s->datport, databuf);
179 static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
182 struct fsl_esdhc_cfg *cfg = mmc->priv;
183 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
187 wml_value = data->blocksize/4;
189 if (data->flags & MMC_DATA_READ) {
190 if (wml_value > WML_RD_WML_MAX)
191 wml_value = WML_RD_WML_MAX_VAL;
193 esdhc_clrsetbits32(®s->wml, WML_RD_WML_MASK, wml_value);
194 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
195 esdhc_write32(®s->dsaddr, (u32)data->dest);
198 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
199 flush_dcache_range((ulong)data->src,
200 (ulong)data->src+data->blocks
203 if (wml_value > WML_WR_WML_MAX)
204 wml_value = WML_WR_WML_MAX_VAL;
205 if ((esdhc_read32(®s->prsstat) & PRSSTAT_WPSPL) == 0) {
206 printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
210 esdhc_clrsetbits32(®s->wml, WML_WR_WML_MASK,
212 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
213 esdhc_write32(®s->dsaddr, (u32)data->src);
217 esdhc_write32(®s->blkattr, data->blocks << 16 | data->blocksize);
219 /* Calculate the timeout period for data transactions */
221 * 1)Timeout period = (2^(timeout+13)) SD Clock cycles
222 * 2)Timeout period should be minimum 0.250sec as per SD Card spec
223 * So, Number of SD Clock cycles for 0.25sec should be minimum
224 * (SD Clock/sec * 0.25 sec) SD Clock cycles
225 * = (mmc->clock * 1/4) SD Clock cycles
227 * => (2^(timeout+13)) >= mmc->clock * 1/4
228 * Taking log2 both the sides
229 * => timeout + 13 >= log2(mmc->clock/4)
230 * Rounding up to next power of 2
231 * => timeout + 13 = log2(mmc->clock/4) + 1
232 * => timeout + 13 = fls(mmc->clock/4)
234 timeout = fls(mmc->clock/4);
243 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC_A001
244 if ((timeout == 4) || (timeout == 8) || (timeout == 12))
248 #ifdef ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE
251 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
256 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
257 static void check_and_invalidate_dcache_range
258 (struct mmc_cmd *cmd,
259 struct mmc_data *data) {
260 unsigned start = (unsigned)data->dest ;
261 unsigned size = roundup(ARCH_DMA_MINALIGN,
262 data->blocks*data->blocksize);
263 unsigned end = start+size ;
264 invalidate_dcache_range(start, end);
269 * Sends a command out on the bus. Takes the mmc pointer,
270 * a command pointer, and an optional data pointer.
273 esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
278 struct fsl_esdhc_cfg *cfg = mmc->priv;
279 volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
281 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
282 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
286 esdhc_write32(®s->irqstat, -1);
290 /* Wait for the bus to be idle */
291 while ((esdhc_read32(®s->prsstat) & PRSSTAT_CICHB) ||
292 (esdhc_read32(®s->prsstat) & PRSSTAT_CIDHB))
295 while (esdhc_read32(®s->prsstat) & PRSSTAT_DLA)
298 /* Wait at least 8 SD clock cycles before the next command */
300 * Note: This is way more than 8 cycles, but 1ms seems to
301 * resolve timing issues with some cards
305 /* Set up for a data transfer if we have one */
307 err = esdhc_setup_data(mmc, data);
312 /* Figure out the transfer arguments */
313 xfertyp = esdhc_xfertyp(cmd, data);
316 esdhc_write32(®s->irqsigen, 0);
318 /* Send the command */
319 esdhc_write32(®s->cmdarg, cmd->cmdarg);
320 #if defined(CONFIG_FSL_USDHC)
321 esdhc_write32(®s->mixctrl,
322 (esdhc_read32(®s->mixctrl) & 0xFFFFFF80) | (xfertyp & 0x7F));
323 esdhc_write32(®s->xfertyp, xfertyp & 0xFFFF0000);
325 esdhc_write32(®s->xfertyp, xfertyp);
328 /* Wait for the command to complete */
329 while (!(esdhc_read32(®s->irqstat) & (IRQSTAT_CC | IRQSTAT_CTOE)))
332 irqstat = esdhc_read32(®s->irqstat);
334 if (irqstat & CMD_ERR) {
339 if (irqstat & IRQSTAT_CTOE) {
344 /* Workaround for ESDHC errata ENGcm03648 */
345 if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
348 /* Poll on DATA0 line for cmd with busy signal for 250 ms */
349 while (timeout > 0 && !(esdhc_read32(®s->prsstat) &
356 printf("Timeout waiting for DAT0 to go high!\n");
362 /* Copy the response to the response buffer */
363 if (cmd->resp_type & MMC_RSP_136) {
364 u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
366 cmdrsp3 = esdhc_read32(®s->cmdrsp3);
367 cmdrsp2 = esdhc_read32(®s->cmdrsp2);
368 cmdrsp1 = esdhc_read32(®s->cmdrsp1);
369 cmdrsp0 = esdhc_read32(®s->cmdrsp0);
370 cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
371 cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
372 cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
373 cmd->response[3] = (cmdrsp0 << 8);
375 cmd->response[0] = esdhc_read32(®s->cmdrsp0);
377 /* Wait until all of the blocks are transferred */
379 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
380 esdhc_pio_read_write(mmc, data);
383 irqstat = esdhc_read32(®s->irqstat);
385 if (irqstat & IRQSTAT_DTOE) {
390 if (irqstat & DATA_ERR) {
394 } while ((irqstat & DATA_COMPLETE) != DATA_COMPLETE);
396 if (data->flags & MMC_DATA_READ)
397 check_and_invalidate_dcache_range(cmd, data);
402 /* Reset CMD and DATA portions on error */
404 esdhc_write32(®s->sysctl, esdhc_read32(®s->sysctl) |
406 while (esdhc_read32(®s->sysctl) & SYSCTL_RSTC)
410 esdhc_write32(®s->sysctl,
411 esdhc_read32(®s->sysctl) |
413 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTD))
418 esdhc_write32(®s->irqstat, -1);
423 static void set_sysctl(struct mmc *mmc, uint clock)
426 struct fsl_esdhc_cfg *cfg = mmc->priv;
427 volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
428 int sdhc_clk = cfg->sdhc_clk;
431 if (clock < mmc->cfg->f_min)
432 clock = mmc->cfg->f_min;
434 if (sdhc_clk / 16 > clock) {
435 for (pre_div = 2; pre_div < 256; pre_div *= 2)
436 if ((sdhc_clk / pre_div) <= (clock * 16))
441 for (div = 1; div <= 16; div++)
442 if ((sdhc_clk / (div * pre_div)) <= clock)
448 clk = (pre_div << 8) | (div << 4);
450 esdhc_clrbits32(®s->sysctl, SYSCTL_CKEN);
452 esdhc_clrsetbits32(®s->sysctl, SYSCTL_CLOCK_MASK, clk);
456 clk = SYSCTL_PEREN | SYSCTL_CKEN;
458 esdhc_setbits32(®s->sysctl, clk);
461 static void esdhc_set_ios(struct mmc *mmc)
463 struct fsl_esdhc_cfg *cfg = mmc->priv;
464 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
466 /* Set the clock speed */
467 set_sysctl(mmc, mmc->clock);
469 /* Set the bus width */
470 esdhc_clrbits32(®s->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
472 if (mmc->bus_width == 4)
473 esdhc_setbits32(®s->proctl, PROCTL_DTW_4);
474 else if (mmc->bus_width == 8)
475 esdhc_setbits32(®s->proctl, PROCTL_DTW_8);
479 static int esdhc_init(struct mmc *mmc)
481 struct fsl_esdhc_cfg *cfg = mmc->priv;
482 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
485 /* Reset the entire host controller */
486 esdhc_setbits32(®s->sysctl, SYSCTL_RSTA);
488 /* Wait until the controller is available */
489 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout)
493 /* Enable cache snooping */
494 esdhc_write32(®s->scr, 0x00000040);
497 esdhc_setbits32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
499 /* Set the initial clock speed */
500 mmc_set_clock(mmc, 400000);
502 /* Disable the BRR and BWR bits in IRQSTAT */
503 esdhc_clrbits32(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
505 /* Put the PROCTL reg back to the default */
506 esdhc_write32(®s->proctl, PROCTL_INIT);
508 /* Set timout to the maximum value */
509 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16);
514 static int esdhc_getcd(struct mmc *mmc)
516 struct fsl_esdhc_cfg *cfg = mmc->priv;
517 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
520 #ifdef CONFIG_ESDHC_DETECT_QUIRK
521 if (CONFIG_ESDHC_DETECT_QUIRK)
524 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_CINS) && --timeout)
530 static void esdhc_reset(struct fsl_esdhc *regs)
532 unsigned long timeout = 100; /* wait max 100 ms */
534 /* reset the controller */
535 esdhc_setbits32(®s->sysctl, SYSCTL_RSTA);
537 /* hardware clears the bit when it is done */
538 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout)
541 printf("MMC/SD: Reset never completed.\n");
544 static const struct mmc_ops esdhc_ops = {
545 .send_cmd = esdhc_send_cmd,
546 .set_ios = esdhc_set_ios,
548 .getcd = esdhc_getcd,
551 int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
553 struct fsl_esdhc *regs;
555 u32 caps, voltage_caps;
560 regs = (struct fsl_esdhc *)cfg->esdhc_base;
562 /* First reset the eSDHC controller */
565 esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN
566 | SYSCTL_IPGEN | SYSCTL_CKEN);
568 writel(SDHCI_IRQ_EN_BITS, ®s->irqstaten);
569 memset(&cfg->cfg, 0, sizeof(cfg->cfg));
572 caps = esdhc_read32(®s->hostcapblt);
574 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135
575 caps = caps & ~(ESDHC_HOSTCAPBLT_SRS |
576 ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30);
579 /* T4240 host controller capabilities register should have VS33 bit */
580 #ifdef CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
581 caps = caps | ESDHC_HOSTCAPBLT_VS33;
584 if (caps & ESDHC_HOSTCAPBLT_VS18)
585 voltage_caps |= MMC_VDD_165_195;
586 if (caps & ESDHC_HOSTCAPBLT_VS30)
587 voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31;
588 if (caps & ESDHC_HOSTCAPBLT_VS33)
589 voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34;
591 cfg->cfg.name = "FSL_SDHC";
592 cfg->cfg.ops = &esdhc_ops;
593 #ifdef CONFIG_SYS_SD_VOLTAGE
594 cfg->cfg.voltages = CONFIG_SYS_SD_VOLTAGE;
596 cfg->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
598 if ((cfg->cfg.voltages & voltage_caps) == 0) {
599 printf("voltage not supported by controller\n");
603 cfg->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT | MMC_MODE_HC;
605 if (cfg->max_bus_width > 0) {
606 if (cfg->max_bus_width < 8)
607 cfg->cfg.host_caps &= ~MMC_MODE_8BIT;
608 if (cfg->max_bus_width < 4)
609 cfg->cfg.host_caps &= ~MMC_MODE_4BIT;
612 if (caps & ESDHC_HOSTCAPBLT_HSS)
613 cfg->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
615 #ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK
616 if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK)
617 cfg->cfg.host_caps &= ~MMC_MODE_8BIT;
620 cfg->cfg.f_min = 400000;
621 cfg->cfg.f_max = min(cfg->sdhc_clk, (u32)52000000);
623 cfg->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
625 mmc = mmc_create(&cfg->cfg, cfg);
632 int fsl_esdhc_mmc_init(bd_t *bis)
634 struct fsl_esdhc_cfg *cfg;
636 cfg = calloc(sizeof(struct fsl_esdhc_cfg), 1);
637 cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
638 cfg->sdhc_clk = gd->arch.sdhc_clk;
639 return fsl_esdhc_initialize(bis, cfg);
642 #ifdef CONFIG_OF_LIBFDT
643 void fdt_fixup_esdhc(void *blob, bd_t *bd)
645 const char *compat = "fsl,esdhc";
647 #ifdef CONFIG_FSL_ESDHC_PIN_MUX
648 if (!hwconfig("esdhc")) {
649 do_fixup_by_compat(blob, compat, "status", "disabled",
655 do_fixup_by_compat_u32(blob, compat, "clock-frequency",
656 gd->arch.sdhc_clk, 1);
658 do_fixup_by_compat(blob, compat, "status", "okay",