2 * Copyright (C) 2004-2006 Atmel Corporation
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 #include <asm/errno.h>
29 #include <asm/byteorder.h>
30 #include <asm/arch/clk.h>
31 #include <asm/arch/memory-map.h>
33 #include "atmel_mci.h"
36 #define pr_debug(fmt, args...) printf(fmt, ##args)
38 #define pr_debug(...) do { } while(0)
41 #ifndef CFG_MMC_CLK_OD
42 #define CFG_MMC_CLK_OD 150000
45 #ifndef CFG_MMC_CLK_PP
46 #define CFG_MMC_CLK_PP 5000000
49 #ifndef CFG_MMC_OP_COND
50 #define CFG_MMC_OP_COND 0x00100000
53 #define MMC_DEFAULT_BLKLEN 512
54 #define MMC_DEFAULT_RCA 1
56 static unsigned int mmc_rca;
57 static int mmc_card_is_sd;
58 static block_dev_desc_t mmc_blkdev;
60 block_dev_desc_t *mmc_get_dev(int dev)
65 static void mci_set_mode(unsigned long hz, unsigned long blklen)
70 bus_hz = get_mci_clk_rate();
71 clkdiv = (bus_hz / hz) / 2 - 1;
73 pr_debug("mmc: setting clock %lu Hz, block size %lu\n",
76 if (clkdiv & ~255UL) {
78 printf("mmc: clock %lu too low; setting CLKDIV to 255\n",
83 mmci_writel(MR, (MMCI_BF(CLKDIV, clkdiv)
84 | MMCI_BF(BLKLEN, blklen)
86 | MMCI_BIT(WRPROOF)));
90 #define R1 MMCI_BF(RSPTYP, 1)
91 #define R2 MMCI_BF(RSPTYP, 2)
92 #define R3 (R1 | RESP_NO_CRC)
94 #define NID MMCI_BF(MAXLAT, 0)
95 #define NCR MMCI_BF(MAXLAT, 1)
96 #define TRCMD_START MMCI_BF(TRCMD, 1)
97 #define TRDIR_READ MMCI_BF(TRDIR, 1)
98 #define TRTYP_BLOCK MMCI_BF(TRTYP, 0)
99 #define INIT_CMD MMCI_BF(SPCMD, 1)
100 #define OPEN_DRAIN MMCI_BF(OPDCMD, 1)
102 #define ERROR_FLAGS (MMCI_BIT(DTOE) \
109 mmc_cmd(unsigned long cmd, unsigned long arg,
110 void *resp, unsigned long flags)
112 unsigned long *response = resp;
113 int i, response_words = 0;
114 unsigned long error_flags;
117 pr_debug("mmc: CMD%lu 0x%lx (flags 0x%lx)\n",
120 error_flags = ERROR_FLAGS;
121 if (!(flags & RESP_NO_CRC))
122 error_flags |= MMCI_BIT(RCRCE);
124 flags &= ~MMCI_BF(CMDNB, ~0UL);
126 if (MMCI_BFEXT(RSPTYP, flags) == MMCI_RSPTYP_48_BIT_RESP)
128 else if (MMCI_BFEXT(RSPTYP, flags) == MMCI_RSPTYP_136_BIT_RESP)
131 mmci_writel(ARGR, arg);
132 mmci_writel(CMDR, cmd | flags);
135 status = mmci_readl(SR);
136 } while (!(status & MMCI_BIT(CMDRDY)));
138 pr_debug("mmc: status 0x%08lx\n", status);
140 if (status & error_flags) {
141 printf("mmc: command %lu failed (status: 0x%08lx)\n",
147 pr_debug("mmc: response:");
149 for (i = 0; i < response_words; i++) {
150 response[i] = mmci_readl(RSPR);
151 pr_debug(" %08lx", response[i]);
158 static int mmc_acmd(unsigned long cmd, unsigned long arg,
159 void *resp, unsigned long flags)
161 unsigned long aresp[4];
165 * Seems like the APP_CMD part of an ACMD has 64 cycles max
166 * latency even though the ACMD part doesn't. This isn't
167 * entirely clear in the SD Card spec, but some cards refuse
168 * to work if we attempt to use 5 cycles max latency here...
170 ret = mmc_cmd(MMC_CMD_APP_CMD, 0, aresp,
171 R1 | NCR | (flags & OPEN_DRAIN));
174 if ((aresp[0] & (R1_ILLEGAL_COMMAND | R1_APP_CMD)) != R1_APP_CMD)
177 ret = mmc_cmd(cmd, arg, resp, flags);
182 mmc_bread(int dev, unsigned long start, lbaint_t blkcnt,
186 unsigned long resp[4];
187 unsigned long card_status, data;
188 unsigned long wordcount;
195 pr_debug("mmc_bread: dev %d, start %lx, blkcnt %lx\n",
198 /* Put the device into Transfer state */
199 ret = mmc_cmd(MMC_CMD_SELECT_CARD, mmc_rca << 16, resp, R1 | NCR);
202 /* Set block length */
203 ret = mmc_cmd(MMC_CMD_SET_BLOCKLEN, mmc_blkdev.blksz, resp, R1 | NCR);
206 pr_debug("MCI_DTOR = %08lx\n", mmci_readl(DTOR));
208 for (i = 0; i < blkcnt; i++, start++) {
209 ret = mmc_cmd(MMC_CMD_READ_SINGLE_BLOCK,
210 start * mmc_blkdev.blksz, resp,
211 (R1 | NCR | TRCMD_START | TRDIR_READ
219 status = mmci_readl(SR);
220 if (status & (ERROR_FLAGS | MMCI_BIT(OVRE)))
222 } while (!(status & MMCI_BIT(RXRDY)));
224 if (status & MMCI_BIT(RXRDY)) {
225 data = mmci_readl(RDR);
226 /* pr_debug("%x\n", data); */
230 } while(wordcount < (mmc_blkdev.blksz / 4));
232 pr_debug("mmc: read %u words, waiting for BLKE\n", wordcount);
235 status = mmci_readl(SR);
236 } while (!(status & MMCI_BIT(BLKE)));
242 /* Put the device back into Standby state */
243 mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, NCR);
247 mmc_cmd(MMC_CMD_SEND_STATUS, mmc_rca << 16, &card_status, R1 | NCR);
248 printf("mmc: bread failed, status = %08x, card status = %08x\n",
249 status, card_status);
253 static void mmc_parse_cid(struct mmc_cid *cid, unsigned long *resp)
255 cid->mid = resp[0] >> 24;
256 cid->oid = (resp[0] >> 8) & 0xffff;
257 cid->pnm[0] = resp[0];
258 cid->pnm[1] = resp[1] >> 24;
259 cid->pnm[2] = resp[1] >> 16;
260 cid->pnm[3] = resp[1] >> 8;
261 cid->pnm[4] = resp[1];
262 cid->pnm[5] = resp[2] >> 24;
264 cid->prv = resp[2] >> 16;
265 cid->psn = (resp[2] << 16) | (resp[3] >> 16);
266 cid->mdt = resp[3] >> 8;
269 static void sd_parse_cid(struct mmc_cid *cid, unsigned long *resp)
271 cid->mid = resp[0] >> 24;
272 cid->oid = (resp[0] >> 8) & 0xffff;
273 cid->pnm[0] = resp[0];
274 cid->pnm[1] = resp[1] >> 24;
275 cid->pnm[2] = resp[1] >> 16;
276 cid->pnm[3] = resp[1] >> 8;
277 cid->pnm[4] = resp[1];
280 cid->prv = resp[2] >> 24;
281 cid->psn = (resp[2] << 8) | (resp[3] >> 24);
282 cid->mdt = (resp[3] >> 8) & 0x0fff;
285 static void mmc_dump_cid(const struct mmc_cid *cid)
287 printf("Manufacturer ID: %02lX\n", cid->mid);
288 printf("OEM/Application ID: %04lX\n", cid->oid);
289 printf("Product name: %s\n", cid->pnm);
290 printf("Product Revision: %lu.%lu\n",
291 cid->prv >> 4, cid->prv & 0x0f);
292 printf("Product Serial Number: %lu\n", cid->psn);
293 printf("Manufacturing Date: %02lu/%02lu\n",
294 cid->mdt >> 4, cid->mdt & 0x0f);
297 static void mmc_dump_csd(const struct mmc_csd *csd)
299 unsigned long *csd_raw = (unsigned long *)csd;
300 printf("CSD data: %08lx %08lx %08lx %08lx\n",
301 csd_raw[0], csd_raw[1], csd_raw[2], csd_raw[3]);
302 printf("CSD structure version: 1.%u\n", csd->csd_structure);
303 printf("MMC System Spec version: %u\n", csd->spec_vers);
304 printf("Card command classes: %03x\n", csd->ccc);
305 printf("Read block length: %u\n", 1 << csd->read_bl_len);
306 if (csd->read_bl_partial)
307 puts("Supports partial reads\n");
309 puts("Does not support partial reads\n");
310 printf("Write block length: %u\n", 1 << csd->write_bl_len);
311 if (csd->write_bl_partial)
312 puts("Supports partial writes\n");
314 puts("Does not support partial writes\n");
315 if (csd->wp_grp_enable)
316 printf("Supports group WP: %u\n", csd->wp_grp_size + 1);
318 puts("Does not support group WP\n");
319 printf("Card capacity: %u bytes\n",
320 (csd->c_size + 1) * (1 << (csd->c_size_mult + 2)) *
321 (1 << csd->read_bl_len));
322 printf("File format: %u/%u\n",
323 csd->file_format_grp, csd->file_format);
324 puts("Write protection: ");
325 if (csd->perm_write_protect)
327 if (csd->tmp_write_protect)
332 static int mmc_idle_cards(void)
336 /* Reset and initialize all cards */
337 ret = mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, NULL, 0);
341 /* Keep the bus idle for 74 clock cycles */
342 return mmc_cmd(0, 0, NULL, INIT_CMD);
345 static int sd_init_card(struct mmc_cid *cid, int verbose)
347 unsigned long resp[4];
351 for (i = 0; i < 1000; i++) {
352 ret = mmc_acmd(SD_CMD_APP_SEND_OP_COND, CFG_MMC_OP_COND,
354 if (ret || (resp[0] & 0x80000000))
362 ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, R2 | NID);
365 sd_parse_cid(cid, resp);
369 /* Get RCA of the card that responded */
370 ret = mmc_cmd(SD_CMD_SEND_RELATIVE_ADDR, 0, resp, R6 | NCR);
374 mmc_rca = resp[0] >> 16;
376 printf("SD Card detected (RCA %u)\n", mmc_rca);
381 static int mmc_init_card(struct mmc_cid *cid, int verbose)
383 unsigned long resp[4];
387 for (i = 0; i < 1000; i++) {
388 ret = mmc_cmd(MMC_CMD_SEND_OP_COND, CFG_MMC_OP_COND, resp,
389 R3 | NID | OPEN_DRAIN);
390 if (ret || (resp[0] & 0x80000000))
398 /* Get CID of all cards. FIXME: Support more than one card */
399 ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, R2 | NID | OPEN_DRAIN);
402 mmc_parse_cid(cid, resp);
406 /* Set Relative Address of the card that responded */
407 ret = mmc_cmd(MMC_CMD_SET_RELATIVE_ADDR, mmc_rca << 16, resp,
408 R1 | NCR | OPEN_DRAIN);
412 static void mci_set_data_timeout(struct mmc_csd *csd)
414 static const unsigned int dtomul_to_shift[] = {
415 0, 4, 7, 8, 10, 12, 16, 20,
417 static const unsigned int taac_exp[] = {
418 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
420 static const unsigned int taac_mant[] = {
421 0, 10, 12, 13, 15, 60, 25, 30,
422 35, 40, 45, 50, 55, 60, 70, 80,
424 unsigned int timeout_ns, timeout_clks;
426 unsigned int dtocyc, dtomul;
430 e = csd->taac & 0x07;
431 m = (csd->taac >> 3) & 0x0f;
433 timeout_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
434 timeout_clks = csd->nsac * 100;
436 timeout_clks += (((timeout_ns + 9) / 10)
437 * ((CFG_MMC_CLK_PP + 99999) / 100000) + 9999) / 10000;
443 dtocyc = timeout_clks;
446 while (dtocyc > 15 && dtomul < 8) {
448 shift = dtomul_to_shift[dtomul];
449 dtocyc = (timeout_clks + (1 << shift) - 1) >> shift;
455 puts("Warning: Using maximum data timeout\n");
458 dtor = (MMCI_BF(DTOMUL, dtomul)
459 | MMCI_BF(DTOCYC, dtocyc));
460 mmci_writel(DTOR, dtor);
462 printf("mmc: Using %u cycles data timeout (DTOR=0x%x)\n",
463 dtocyc << shift, dtor);
466 int mmc_init(int verbose)
470 unsigned int max_blksz;
473 /* Initialize controller */
474 mmci_writel(CR, MMCI_BIT(SWRST));
475 mmci_writel(CR, MMCI_BIT(MCIEN));
476 mmci_writel(DTOR, 0x5f);
477 mmci_writel(IDR, ~0UL);
478 mci_set_mode(CFG_MMC_CLK_OD, MMC_DEFAULT_BLKLEN);
482 ret = sd_init_card(&cid, verbose);
484 mmc_rca = MMC_DEFAULT_RCA;
485 ret = mmc_init_card(&cid, verbose);
490 /* Get CSD from the card */
491 ret = mmc_cmd(MMC_CMD_SEND_CSD, mmc_rca << 16, &csd, R2 | NCR);
497 mci_set_data_timeout(&csd);
499 /* Initialize the blockdev structure */
500 mmc_blkdev.if_type = IF_TYPE_MMC;
501 mmc_blkdev.part_type = PART_TYPE_DOS;
502 mmc_blkdev.block_read = mmc_bread;
503 sprintf((char *)mmc_blkdev.vendor,
504 "Man %02x%04x Snr %08x",
505 cid.mid, cid.oid, cid.psn);
506 strncpy((char *)mmc_blkdev.product, cid.pnm,
507 sizeof(mmc_blkdev.product));
508 sprintf((char *)mmc_blkdev.revision, "%x %x",
509 cid.prv >> 4, cid.prv & 0x0f);
512 * If we can't use 512 byte blocks, refuse to deal with the
513 * card. Tons of code elsewhere seems to depend on this.
515 max_blksz = 1 << csd.read_bl_len;
516 if (max_blksz < 512 || (max_blksz > 512 && !csd.read_bl_partial)) {
517 printf("Card does not support 512 byte reads, aborting.\n");
520 mmc_blkdev.blksz = 512;
521 mmc_blkdev.lba = (csd.c_size + 1) * (1 << (csd.c_size_mult + 2));
523 mci_set_mode(CFG_MMC_CLK_PP, mmc_blkdev.blksz);
526 if (fat_register_device(&mmc_blkdev, 1))
527 printf("Could not register MMC fat device\n");
529 init_part(&mmc_blkdev);
535 int mmc_read(ulong src, uchar *dst, int size)
540 int mmc_write(uchar *src, ulong dst, int size)
545 int mmc2info(ulong addr)