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 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
36 #include <fsl_esdhc.h>
37 #include <fdt_support.h>
40 DECLARE_GLOBAL_DATA_PTR;
70 /* Return the XFERTYP flags for a given command and data packet */
71 static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
76 xfertyp |= XFERTYP_DPSEL;
77 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
78 xfertyp |= XFERTYP_DMAEN;
80 if (data->blocks > 1) {
81 xfertyp |= XFERTYP_MSBSEL;
82 xfertyp |= XFERTYP_BCEN;
83 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
84 xfertyp |= XFERTYP_AC12EN;
88 if (data->flags & MMC_DATA_READ)
89 xfertyp |= XFERTYP_DTDSEL;
92 if (cmd->resp_type & MMC_RSP_CRC)
93 xfertyp |= XFERTYP_CCCEN;
94 if (cmd->resp_type & MMC_RSP_OPCODE)
95 xfertyp |= XFERTYP_CICEN;
96 if (cmd->resp_type & MMC_RSP_136)
97 xfertyp |= XFERTYP_RSPTYP_136;
98 else if (cmd->resp_type & MMC_RSP_BUSY)
99 xfertyp |= XFERTYP_RSPTYP_48_BUSY;
100 else if (cmd->resp_type & MMC_RSP_PRESENT)
101 xfertyp |= XFERTYP_RSPTYP_48;
104 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
105 xfertyp |= XFERTYP_CMDTYP_ABORT;
107 return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
110 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
112 * PIO Read/Write Mode reduce the performace as DMA is not used in this mode.
115 esdhc_pio_read_write(struct mmc *mmc, struct mmc_data *data)
117 struct fsl_esdhc_cfg *cfg = mmc->priv;
118 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
126 if (data->flags & MMC_DATA_READ) {
127 blocks = data->blocks;
130 timeout = PIO_TIMEOUT;
131 size = data->blocksize;
132 irqstat = esdhc_read32(®s->irqstat);
133 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BREN)
136 printf("\nData Read Failed in PIO Mode.");
139 while (size && (!(irqstat & IRQSTAT_TC))) {
140 udelay(100); /* Wait before last byte transfer complete */
141 irqstat = esdhc_read32(®s->irqstat);
142 databuf = in_le32(®s->datport);
143 *((uint *)buffer) = databuf;
150 blocks = data->blocks;
151 buffer = (char *)data->src;
153 timeout = PIO_TIMEOUT;
154 size = data->blocksize;
155 irqstat = esdhc_read32(®s->irqstat);
156 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BWEN)
159 printf("\nData Write Failed in PIO Mode.");
162 while (size && (!(irqstat & IRQSTAT_TC))) {
163 udelay(100); /* Wait before last byte transfer complete */
164 databuf = *((uint *)buffer);
167 irqstat = esdhc_read32(®s->irqstat);
168 out_le32(®s->datport, databuf);
176 static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
179 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
180 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
181 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
184 wml_value = data->blocksize/4;
186 if (data->flags & MMC_DATA_READ) {
187 if (wml_value > WML_RD_WML_MAX)
188 wml_value = WML_RD_WML_MAX_VAL;
190 esdhc_clrsetbits32(®s->wml, WML_RD_WML_MASK, wml_value);
191 esdhc_write32(®s->dsaddr, (u32)data->dest);
193 flush_dcache_range((ulong)data->src,
194 (ulong)data->src+data->blocks
197 if (wml_value > WML_WR_WML_MAX)
198 wml_value = WML_WR_WML_MAX_VAL;
199 if ((esdhc_read32(®s->prsstat) & PRSSTAT_WPSPL) == 0) {
200 printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
204 esdhc_clrsetbits32(®s->wml, WML_WR_WML_MASK,
206 esdhc_write32(®s->dsaddr, (u32)data->src);
208 #else /* CONFIG_SYS_FSL_ESDHC_USE_PIO */
209 if (!(data->flags & MMC_DATA_READ)) {
210 if ((esdhc_read32(®s->prsstat) & PRSSTAT_WPSPL) == 0) {
211 printf("\nThe SD card is locked. "
212 "Can not write to a locked card.\n\n");
215 esdhc_write32(®s->dsaddr, (u32)data->src);
217 esdhc_write32(®s->dsaddr, (u32)data->dest);
218 #endif /* CONFIG_SYS_FSL_ESDHC_USE_PIO */
220 esdhc_write32(®s->blkattr, data->blocks << 16 | data->blocksize);
222 /* Calculate the timeout period for data transactions */
224 * 1)Timeout period = (2^(timeout+13)) SD Clock cycles
225 * 2)Timeout period should be minimum 0.250sec as per SD Card spec
226 * So, Number of SD Clock cycles for 0.25sec should be minimum
227 * (SD Clock/sec * 0.25 sec) SD Clock cycles
228 * = (mmc->tran_speed * 1/4) SD Clock cycles
230 * => (2^(timeout+13)) >= mmc->tran_speed * 1/4
231 * Taking log2 both the sides
232 * => timeout + 13 >= log2(mmc->tran_speed/4)
233 * Rounding up to next power of 2
234 * => timeout + 13 = log2(mmc->tran_speed/4) + 1
235 * => timeout + 13 = fls(mmc->tran_speed/4)
237 timeout = fls(mmc->tran_speed/4);
246 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC_A001
247 if ((timeout == 4) || (timeout == 8) || (timeout == 12))
251 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
256 static void check_and_invalidate_dcache_range
257 (struct mmc_cmd *cmd,
258 struct mmc_data *data) {
259 unsigned start = (unsigned)data->dest ;
260 unsigned size = roundup(ARCH_DMA_MINALIGN,
261 data->blocks*data->blocksize);
262 unsigned end = start+size ;
263 invalidate_dcache_range(start, end);
266 * Sends a command out on the bus. Takes the mmc pointer,
267 * a command pointer, and an optional data pointer.
270 esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
274 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
275 volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
277 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
278 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
282 esdhc_write32(®s->irqstat, -1);
286 /* Wait for the bus to be idle */
287 while ((esdhc_read32(®s->prsstat) & PRSSTAT_CICHB) ||
288 (esdhc_read32(®s->prsstat) & PRSSTAT_CIDHB))
291 while (esdhc_read32(®s->prsstat) & PRSSTAT_DLA)
294 /* Wait at least 8 SD clock cycles before the next command */
296 * Note: This is way more than 8 cycles, but 1ms seems to
297 * resolve timing issues with some cards
301 /* Set up for a data transfer if we have one */
305 err = esdhc_setup_data(mmc, data);
310 /* Figure out the transfer arguments */
311 xfertyp = esdhc_xfertyp(cmd, data);
313 /* Send the command */
314 esdhc_write32(®s->cmdarg, cmd->cmdarg);
315 #if defined(CONFIG_FSL_USDHC)
316 esdhc_write32(®s->mixctrl,
317 (esdhc_read32(®s->mixctrl) & 0xFFFFFF80) | (xfertyp & 0x7F));
318 esdhc_write32(®s->xfertyp, xfertyp & 0xFFFF0000);
320 esdhc_write32(®s->xfertyp, xfertyp);
324 esdhc_write32(®s->irqsigen, 0);
326 /* Wait for the command to complete */
327 while (!(esdhc_read32(®s->irqstat) & (IRQSTAT_CC | IRQSTAT_CTOE)))
330 irqstat = esdhc_read32(®s->irqstat);
331 esdhc_write32(®s->irqstat, irqstat);
333 /* Reset CMD and DATA portions on error */
334 if (irqstat & (CMD_ERR | IRQSTAT_CTOE)) {
335 esdhc_write32(®s->sysctl, esdhc_read32(®s->sysctl) |
337 while (esdhc_read32(®s->sysctl) & SYSCTL_RSTC)
341 esdhc_write32(®s->sysctl,
342 esdhc_read32(®s->sysctl) |
344 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTD))
349 if (irqstat & CMD_ERR)
352 if (irqstat & IRQSTAT_CTOE)
355 /* Workaround for ESDHC errata ENGcm03648 */
356 if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
359 /* Poll on DATA0 line for cmd with busy signal for 250 ms */
360 while (timeout > 0 && !(esdhc_read32(®s->prsstat) &
367 printf("Timeout waiting for DAT0 to go high!\n");
372 /* Copy the response to the response buffer */
373 if (cmd->resp_type & MMC_RSP_136) {
374 u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
376 cmdrsp3 = esdhc_read32(®s->cmdrsp3);
377 cmdrsp2 = esdhc_read32(®s->cmdrsp2);
378 cmdrsp1 = esdhc_read32(®s->cmdrsp1);
379 cmdrsp0 = esdhc_read32(®s->cmdrsp0);
380 cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
381 cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
382 cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
383 cmd->response[3] = (cmdrsp0 << 8);
385 cmd->response[0] = esdhc_read32(®s->cmdrsp0);
387 /* Wait until all of the blocks are transferred */
389 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
390 esdhc_pio_read_write(mmc, data);
393 irqstat = esdhc_read32(®s->irqstat);
395 if (irqstat & IRQSTAT_DTOE)
398 if (irqstat & DATA_ERR)
400 } while ((irqstat & DATA_COMPLETE) != DATA_COMPLETE);
402 if (data->flags & MMC_DATA_READ)
403 check_and_invalidate_dcache_range(cmd, data);
406 esdhc_write32(®s->irqstat, -1);
411 static void set_sysctl(struct mmc *mmc, uint clock)
414 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
415 volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
416 int sdhc_clk = cfg->sdhc_clk;
419 if (clock < mmc->f_min)
422 if (sdhc_clk / 16 > clock) {
423 for (pre_div = 2; pre_div < 256; pre_div *= 2)
424 if ((sdhc_clk / pre_div) <= (clock * 16))
429 for (div = 1; div <= 16; div++)
430 if ((sdhc_clk / (div * pre_div)) <= clock)
436 clk = (pre_div << 8) | (div << 4);
438 esdhc_clrbits32(®s->sysctl, SYSCTL_CKEN);
440 esdhc_clrsetbits32(®s->sysctl, SYSCTL_CLOCK_MASK, clk);
444 clk = SYSCTL_PEREN | SYSCTL_CKEN;
446 esdhc_setbits32(®s->sysctl, clk);
449 static void esdhc_set_ios(struct mmc *mmc)
451 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
452 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
454 /* Set the clock speed */
455 set_sysctl(mmc, mmc->clock);
457 /* Set the bus width */
458 esdhc_clrbits32(®s->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
460 if (mmc->bus_width == 4)
461 esdhc_setbits32(®s->proctl, PROCTL_DTW_4);
462 else if (mmc->bus_width == 8)
463 esdhc_setbits32(®s->proctl, PROCTL_DTW_8);
467 static int esdhc_init(struct mmc *mmc)
469 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
470 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
473 /* Reset the entire host controller */
474 esdhc_write32(®s->sysctl, SYSCTL_RSTA);
476 /* Wait until the controller is available */
477 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout)
481 /* Enable cache snooping */
482 esdhc_write32(®s->scr, 0x00000040);
485 esdhc_write32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
487 /* Set the initial clock speed */
488 mmc_set_clock(mmc, 400000);
490 /* Disable the BRR and BWR bits in IRQSTAT */
491 esdhc_clrbits32(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
493 /* Put the PROCTL reg back to the default */
494 esdhc_write32(®s->proctl, PROCTL_INIT);
496 /* Set timout to the maximum value */
497 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16);
502 static int esdhc_getcd(struct mmc *mmc)
504 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
505 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
508 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_CINS) && --timeout)
514 static void esdhc_reset(struct fsl_esdhc *regs)
516 unsigned long timeout = 100; /* wait max 100 ms */
518 /* reset the controller */
519 esdhc_write32(®s->sysctl, SYSCTL_RSTA);
521 /* hardware clears the bit when it is done */
522 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout)
525 printf("MMC/SD: Reset never completed.\n");
528 int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
530 struct fsl_esdhc *regs;
532 u32 caps, voltage_caps;
537 mmc = malloc(sizeof(struct mmc));
539 sprintf(mmc->name, "FSL_SDHC");
540 regs = (struct fsl_esdhc *)cfg->esdhc_base;
542 /* First reset the eSDHC controller */
545 esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN
546 | SYSCTL_IPGEN | SYSCTL_CKEN);
549 mmc->send_cmd = esdhc_send_cmd;
550 mmc->set_ios = esdhc_set_ios;
551 mmc->init = esdhc_init;
552 mmc->getcd = esdhc_getcd;
556 caps = regs->hostcapblt;
558 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135
559 caps = caps & ~(ESDHC_HOSTCAPBLT_SRS |
560 ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30);
562 if (caps & ESDHC_HOSTCAPBLT_VS18)
563 voltage_caps |= MMC_VDD_165_195;
564 if (caps & ESDHC_HOSTCAPBLT_VS30)
565 voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31;
566 if (caps & ESDHC_HOSTCAPBLT_VS33)
567 voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34;
569 #ifdef CONFIG_SYS_SD_VOLTAGE
570 mmc->voltages = CONFIG_SYS_SD_VOLTAGE;
572 mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
574 if ((mmc->voltages & voltage_caps) == 0) {
575 printf("voltage not supported by controller\n");
579 mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT | MMC_MODE_HC;
581 if (cfg->max_bus_width > 0) {
582 if (cfg->max_bus_width < 8)
583 mmc->host_caps &= ~MMC_MODE_8BIT;
584 if (cfg->max_bus_width < 4)
585 mmc->host_caps &= ~MMC_MODE_4BIT;
588 if (caps & ESDHC_HOSTCAPBLT_HSS)
589 mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
592 mmc->f_max = MIN(gd->arch.sdhc_clk, 52000000);
600 int fsl_esdhc_mmc_init(bd_t *bis)
602 struct fsl_esdhc_cfg *cfg;
604 cfg = calloc(sizeof(struct fsl_esdhc_cfg), 1);
605 cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
606 cfg->sdhc_clk = gd->arch.sdhc_clk;
607 return fsl_esdhc_initialize(bis, cfg);
610 #ifdef CONFIG_OF_LIBFDT
611 void fdt_fixup_esdhc(void *blob, bd_t *bd)
613 const char *compat = "fsl,esdhc";
615 #ifdef CONFIG_FSL_ESDHC_PIN_MUX
616 if (!hwconfig("esdhc")) {
617 do_fixup_by_compat(blob, compat, "status", "disabled",
623 do_fixup_by_compat_u32(blob, compat, "clock-frequency",
624 gd->arch.sdhc_clk, 1);
626 do_fixup_by_compat(blob, compat, "status", "okay",