2 * Copyright 2007,2010 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;
69 /* Return the XFERTYP flags for a given command and data packet */
70 uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
75 xfertyp |= XFERTYP_DPSEL;
76 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
77 xfertyp |= XFERTYP_DMAEN;
79 if (data->blocks > 1) {
80 xfertyp |= XFERTYP_MSBSEL;
81 xfertyp |= XFERTYP_BCEN;
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 return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
102 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
104 * PIO Read/Write Mode reduce the performace as DMA is not used in this mode.
107 esdhc_pio_read_write(struct mmc *mmc, struct mmc_data *data)
109 struct fsl_esdhc *regs = mmc->priv;
117 if (data->flags & MMC_DATA_READ) {
118 blocks = data->blocks;
121 timeout = PIO_TIMEOUT;
122 size = data->blocksize;
123 irqstat = esdhc_read32(®s->irqstat);
124 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BREN)
127 printf("\nData Read Failed in PIO Mode.");
130 while (size && (!(irqstat & IRQSTAT_TC))) {
131 udelay(100); /* Wait before last byte transfer complete */
132 irqstat = esdhc_read32(®s->irqstat);
133 databuf = in_le32(®s->datport);
134 *((uint *)buffer) = databuf;
141 blocks = data->blocks;
142 buffer = (char *)data->src;
144 timeout = PIO_TIMEOUT;
145 size = data->blocksize;
146 irqstat = esdhc_read32(®s->irqstat);
147 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BWEN)
150 printf("\nData Write Failed in PIO Mode.");
153 while (size && (!(irqstat & IRQSTAT_TC))) {
154 udelay(100); /* Wait before last byte transfer complete */
155 databuf = *((uint *)buffer);
158 irqstat = esdhc_read32(®s->irqstat);
159 out_le32(®s->datport, databuf);
167 static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
170 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
171 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
172 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
175 wml_value = data->blocksize/4;
177 if (data->flags & MMC_DATA_READ) {
178 if (wml_value > 0x10)
181 esdhc_clrsetbits32(®s->wml, WML_RD_WML_MASK, wml_value);
182 esdhc_write32(®s->dsaddr, (u32)data->dest);
184 if (wml_value > 0x80)
186 if ((esdhc_read32(®s->prsstat) & PRSSTAT_WPSPL) == 0) {
187 printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
191 esdhc_clrsetbits32(®s->wml, WML_WR_WML_MASK,
193 esdhc_write32(®s->dsaddr, (u32)data->src);
195 #else /* CONFIG_SYS_FSL_ESDHC_USE_PIO */
196 if (!(data->flags & MMC_DATA_READ)) {
197 if ((esdhc_read32(®s->prsstat) & PRSSTAT_WPSPL) == 0) {
198 printf("\nThe SD card is locked. "
199 "Can not write to a locked card.\n\n");
202 esdhc_write32(®s->dsaddr, (u32)data->src);
204 esdhc_write32(®s->dsaddr, (u32)data->dest);
205 #endif /* CONFIG_SYS_FSL_ESDHC_USE_PIO */
207 esdhc_write32(®s->blkattr, data->blocks << 16 | data->blocksize);
209 /* Calculate the timeout period for data transactions */
210 timeout = fls(mmc->tran_speed/10) - 1;
219 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
226 * Sends a command out on the bus. Takes the mmc pointer,
227 * a command pointer, and an optional data pointer.
230 esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
234 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
235 volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
237 esdhc_write32(®s->irqstat, -1);
241 /* Wait for the bus to be idle */
242 while ((esdhc_read32(®s->prsstat) & PRSSTAT_CICHB) ||
243 (esdhc_read32(®s->prsstat) & PRSSTAT_CIDHB))
246 while (esdhc_read32(®s->prsstat) & PRSSTAT_DLA)
249 /* Wait at least 8 SD clock cycles before the next command */
251 * Note: This is way more than 8 cycles, but 1ms seems to
252 * resolve timing issues with some cards
256 /* Set up for a data transfer if we have one */
260 err = esdhc_setup_data(mmc, data);
265 /* Figure out the transfer arguments */
266 xfertyp = esdhc_xfertyp(cmd, data);
268 /* Send the command */
269 esdhc_write32(®s->cmdarg, cmd->cmdarg);
270 esdhc_write32(®s->xfertyp, xfertyp);
272 /* Wait for the command to complete */
273 while (!(esdhc_read32(®s->irqstat) & IRQSTAT_CC))
276 irqstat = esdhc_read32(®s->irqstat);
277 esdhc_write32(®s->irqstat, irqstat);
279 if (irqstat & CMD_ERR)
282 if (irqstat & IRQSTAT_CTOE)
285 /* Copy the response to the response buffer */
286 if (cmd->resp_type & MMC_RSP_136) {
287 u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
289 cmdrsp3 = esdhc_read32(®s->cmdrsp3);
290 cmdrsp2 = esdhc_read32(®s->cmdrsp2);
291 cmdrsp1 = esdhc_read32(®s->cmdrsp1);
292 cmdrsp0 = esdhc_read32(®s->cmdrsp0);
293 cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
294 cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
295 cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
296 cmd->response[3] = (cmdrsp0 << 8);
298 cmd->response[0] = esdhc_read32(®s->cmdrsp0);
300 /* Wait until all of the blocks are transferred */
302 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
303 esdhc_pio_read_write(mmc, data);
306 irqstat = esdhc_read32(®s->irqstat);
308 if (irqstat & DATA_ERR)
311 if (irqstat & IRQSTAT_DTOE)
313 } while (!(irqstat & IRQSTAT_TC) &&
314 (esdhc_read32(®s->prsstat) & PRSSTAT_DLA));
318 esdhc_write32(®s->irqstat, -1);
323 void set_sysctl(struct mmc *mmc, uint clock)
325 int sdhc_clk = gd->sdhc_clk;
327 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
328 volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
331 if (clock < mmc->f_min)
334 if (sdhc_clk / 16 > clock) {
335 for (pre_div = 2; pre_div < 256; pre_div *= 2)
336 if ((sdhc_clk / pre_div) <= (clock * 16))
341 for (div = 1; div <= 16; div++)
342 if ((sdhc_clk / (div * pre_div)) <= clock)
348 clk = (pre_div << 8) | (div << 4);
350 esdhc_clrbits32(®s->sysctl, SYSCTL_CKEN);
352 esdhc_clrsetbits32(®s->sysctl, SYSCTL_CLOCK_MASK, clk);
356 clk = SYSCTL_PEREN | SYSCTL_CKEN;
358 esdhc_setbits32(®s->sysctl, clk);
361 static void esdhc_set_ios(struct mmc *mmc)
363 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
364 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
366 /* Set the clock speed */
367 set_sysctl(mmc, mmc->clock);
369 /* Set the bus width */
370 esdhc_clrbits32(®s->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
372 if (mmc->bus_width == 4)
373 esdhc_setbits32(®s->proctl, PROCTL_DTW_4);
374 else if (mmc->bus_width == 8)
375 esdhc_setbits32(®s->proctl, PROCTL_DTW_8);
379 static int esdhc_init(struct mmc *mmc)
381 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
382 struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
387 /* Reset the entire host controller */
388 esdhc_write32(®s->sysctl, SYSCTL_RSTA);
390 /* Wait until the controller is available */
391 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout)
394 /* Enable cache snooping */
395 if (cfg && !cfg->no_snoop)
396 esdhc_write32(®s->scr, 0x00000040);
398 esdhc_write32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
400 /* Set the initial clock speed */
401 set_sysctl(mmc, 400000);
403 /* Disable the BRR and BWR bits in IRQSTAT */
404 esdhc_clrbits32(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
406 /* Put the PROCTL reg back to the default */
407 esdhc_write32(®s->proctl, PROCTL_INIT);
409 /* Set timout to the maximum value */
410 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16);
412 /* Check if there is a callback for detecting the card */
413 if (board_mmc_getcd(&card_absent, mmc)) {
415 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_CINS) &&
429 static void esdhc_reset(struct fsl_esdhc *regs)
431 unsigned long timeout = 100; /* wait max 100 ms */
433 /* reset the controller */
434 esdhc_write32(®s->sysctl, SYSCTL_RSTA);
436 /* hardware clears the bit when it is done */
437 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout)
440 printf("MMC/SD: Reset never completed.\n");
443 int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
445 struct fsl_esdhc *regs;
452 mmc = malloc(sizeof(struct mmc));
454 sprintf(mmc->name, "FSL_ESDHC");
455 regs = (struct fsl_esdhc *)cfg->esdhc_base;
457 /* First reset the eSDHC controller */
461 mmc->send_cmd = esdhc_send_cmd;
462 mmc->set_ios = esdhc_set_ios;
463 mmc->init = esdhc_init;
465 caps = regs->hostcapblt;
467 if (caps & ESDHC_HOSTCAPBLT_VS18)
468 mmc->voltages |= MMC_VDD_165_195;
469 if (caps & ESDHC_HOSTCAPBLT_VS30)
470 mmc->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
471 if (caps & ESDHC_HOSTCAPBLT_VS33)
472 mmc->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
474 mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
476 if (caps & ESDHC_HOSTCAPBLT_HSS)
477 mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
480 mmc->f_max = MIN(gd->sdhc_clk, 50000000);
487 int fsl_esdhc_mmc_init(bd_t *bis)
489 struct fsl_esdhc_cfg *cfg;
491 cfg = malloc(sizeof(struct fsl_esdhc_cfg));
492 memset(cfg, 0, sizeof(struct fsl_esdhc_cfg));
493 cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
494 return fsl_esdhc_initialize(bis, cfg);
497 #ifdef CONFIG_OF_LIBFDT
498 void fdt_fixup_esdhc(void *blob, bd_t *bd)
500 const char *compat = "fsl,esdhc";
501 const char *status = "okay";
503 if (!hwconfig("esdhc")) {
508 do_fixup_by_compat_u32(blob, compat, "clock-frequency",
511 do_fixup_by_compat(blob, compat, "status", status,
512 strlen(status) + 1, 1);