3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #include <asm/errno.h>
28 #include <asm/arch/hardware.h>
34 fat_register_device(block_dev_desc_t *dev_desc, int part_no);
36 static block_dev_desc_t mmc_dev;
38 block_dev_desc_t * mmc_get_dev(int dev)
40 return ((block_dev_desc_t *)&mmc_dev);
44 * FIXME needs to read cid and csd info to determine block size
45 * and other parameters
47 static uchar mmc_buf[MMC_BLOCK_SIZE];
48 static mmc_csd_t mmc_csd;
49 static int mmc_ready = 0;
53 /****************************************************/
54 mmc_cmd(ushort cmd, ushort argh, ushort argl, ushort cmdat)
55 /****************************************************/
57 static uchar resp[20];
61 debug("mmc_cmd %x %x %x %x\n", cmd, argh, argl, cmdat);
62 MMC_STRPCL = MMC_STRPCL_STOP_CLK;
63 MMC_I_MASK = ~MMC_I_MASK_CLK_IS_OFF;
64 while (!(MMC_I_REG & MMC_I_REG_CLK_IS_OFF));
69 MMC_I_MASK = ~MMC_I_MASK_END_CMD_RES;
70 MMC_STRPCL = MMC_STRPCL_START_CLK;
71 while (!(MMC_I_REG & MMC_I_REG_END_CMD_RES));
74 debug("MMC status %x\n", status);
75 if (status & MMC_STAT_TIME_OUT_RESPONSE)
94 for (i = words-1; i >= 0; i--)
96 ulong res_fifo = MMC_RES;
99 resp[offset] = ((uchar *)&res_fifo)[0];
100 resp[offset+1] = ((uchar *)&res_fifo)[1];
103 for (i=0; i<words*2; i += 2)
105 printf("MMC resp[%d] = %02x\n", i, resp[i]);
106 printf("MMC resp[%d] = %02x\n", i+1, resp[i+1]);
113 /****************************************************/
114 mmc_block_read(uchar *dst, ulong src, ulong len)
115 /****************************************************/
126 debug("mmc_block_rd dst %lx src %lx len %d\n", (ulong)dst, src, len);
132 resp = mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1);
134 /* send read command */
137 MMC_STRPCL = MMC_STRPCL_STOP_CLK;
141 resp = mmc_cmd(MMC_CMD_READ_BLOCK, argh, argl,
142 MMC_CMDAT_R1|MMC_CMDAT_READ|MMC_CMDAT_BLOCK|MMC_CMDAT_DATA_EN);
145 MMC_I_MASK = ~MMC_I_MASK_RXFIFO_RD_REQ;
148 if (MMC_I_REG & MMC_I_REG_RXFIFO_RD_REQ)
154 if (status & MMC_STAT_ERRORS)
156 printf("MMC_STAT error %lx\n", status);
160 MMC_I_MASK = ~MMC_I_MASK_DATA_TRAN_DONE;
161 while (!(MMC_I_REG & MMC_I_REG_DATA_TRAN_DONE));
163 if (status & MMC_STAT_ERRORS)
165 printf("MMC_STAT error %lx\n", status);
172 /****************************************************/
173 mmc_block_write(ulong dst, uchar *src, int len)
174 /****************************************************/
185 debug("mmc_block_wr dst %lx src %lx len %d\n", dst, (ulong)src, len);
191 resp = mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1);
193 /* send write command */
196 MMC_STRPCL = MMC_STRPCL_STOP_CLK;
199 resp = mmc_cmd(MMC_CMD_WRITE_BLOCK, argh, argl,
200 MMC_CMDAT_R1|MMC_CMDAT_WRITE|MMC_CMDAT_BLOCK|MMC_CMDAT_DATA_EN);
202 MMC_I_MASK = ~MMC_I_MASK_TXFIFO_WR_REQ;
205 if (MMC_I_REG & MMC_I_REG_TXFIFO_WR_REQ)
207 int i, bytes = min(32,len);
209 for (i=0; i<bytes; i++)
215 MMC_PRTBUF = MMC_PRTBUF_BUF_PART_FULL;
220 if (status & MMC_STAT_ERRORS)
222 printf("MMC_STAT error %lx\n", status);
226 MMC_I_MASK = ~MMC_I_MASK_DATA_TRAN_DONE;
227 while (!(MMC_I_REG & MMC_I_REG_DATA_TRAN_DONE));
228 MMC_I_MASK = ~MMC_I_MASK_PRG_DONE;
229 while (!(MMC_I_REG & MMC_I_REG_PRG_DONE));
231 if (status & MMC_STAT_ERRORS)
233 printf("MMC_STAT error %lx\n", status);
241 /****************************************************/
242 mmc_read(ulong src, uchar *dst, int size)
243 /****************************************************/
245 ulong end, part_start, part_end, part_len, aligned_start, aligned_end;
246 ulong mmc_block_size, mmc_block_address;
255 printf("Please initial the MMC first\n");
259 mmc_block_size = MMC_BLOCK_SIZE;
260 mmc_block_address = ~(mmc_block_size - 1);
264 part_start = ~mmc_block_address & src;
265 part_end = ~mmc_block_address & end;
266 aligned_start = mmc_block_address & src;
267 aligned_end = mmc_block_address & end;
269 /* all block aligned accesses */
270 debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
271 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
274 part_len = mmc_block_size - part_start;
275 debug("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
276 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
277 if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) < 0)
281 memcpy(dst, mmc_buf+part_start, part_len);
285 debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
286 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
287 for (; src < aligned_end; src += mmc_block_size, dst += mmc_block_size)
289 debug("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
290 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
291 if ((mmc_block_read((uchar *)(dst), src, mmc_block_size)) < 0)
296 debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
297 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
298 if (part_end && src < end)
300 debug("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
301 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
302 if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0)
306 memcpy(dst, mmc_buf, part_end);
312 /****************************************************/
313 mmc_write(uchar *src, ulong dst, int size)
314 /****************************************************/
316 ulong end, part_start, part_end, part_len, aligned_start, aligned_end;
317 ulong mmc_block_size, mmc_block_address;
326 printf("Please initial the MMC first\n");
330 mmc_block_size = MMC_BLOCK_SIZE;
331 mmc_block_address = ~(mmc_block_size - 1);
335 part_start = ~mmc_block_address & dst;
336 part_end = ~mmc_block_address & end;
337 aligned_start = mmc_block_address & dst;
338 aligned_end = mmc_block_address & end;
340 /* all block aligned accesses */
341 debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
342 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
345 part_len = mmc_block_size - part_start;
346 debug("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
347 (ulong)src, dst, end, part_start, part_end, aligned_start, aligned_end);
348 if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) < 0)
352 memcpy(mmc_buf+part_start, src, part_len);
353 if ((mmc_block_write(aligned_start, mmc_buf, mmc_block_size)) < 0)
360 debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
361 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
362 for (; dst < aligned_end; src += mmc_block_size, dst += mmc_block_size)
364 debug("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
365 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
366 if ((mmc_block_write(dst, (uchar *)src, mmc_block_size)) < 0)
371 debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
372 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
373 if (part_end && dst < end)
375 debug("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
376 src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
377 if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0)
381 memcpy(mmc_buf, src, part_end);
382 if ((mmc_block_write(aligned_end, mmc_buf, mmc_block_size)) < 0)
391 /****************************************************/
392 mmc_bread(int dev_num, ulong blknr, ulong blkcnt, ulong *dst)
393 /****************************************************/
395 int mmc_block_size = MMC_BLOCK_SIZE;
396 ulong src = blknr * mmc_block_size + CFG_MMC_BASE;
398 mmc_read(src, (uchar *)dst, blkcnt*mmc_block_size);
403 /****************************************************/
404 mmc_init(int verbose)
405 /****************************************************/
407 int retries, rc = -ENODEV;
410 #ifdef CONFIG_LUBBOCK
411 set_GPIO_mode( GPIO6_MMCCLK_MD );
412 set_GPIO_mode( GPIO8_MMCCS0_MD );
414 CKEN |= CKEN12_MMC; /* enable MMC unit clock */
418 MMC_CLKRT = MMC_CLKRT_0_3125MHZ;
419 MMC_RESTO = MMC_RES_TO_MAX;
420 MMC_SPI = MMC_SPI_DISABLE;
424 resp = mmc_cmd(0, 0, 0, 0);
425 resp = mmc_cmd(1, 0x00ff, 0xc000, MMC_CMDAT_INIT|MMC_CMDAT_BUSY|MMC_CMDAT_R3);
426 while (retries-- && resp && !(resp[4] & 0x80))
428 debug("resp %x %x\n", resp[0], resp[1]);
430 resp = mmc_cmd(1, 0x00ff, 0xff00, MMC_CMDAT_BUSY|MMC_CMDAT_R3);
433 /* try to get card id */
434 resp = mmc_cmd(2, 0, 0, MMC_CMDAT_R2);
437 /* TODO configure mmc driver depending on card attributes */
438 mmc_cid_t *cid = (mmc_cid_t *)resp;
441 printf("MMC found. Card desciption is:\n");
442 printf("Manufacturer ID = %02x%02x%02x\n",
443 cid->id[0], cid->id[1], cid->id[2]);
444 printf("HW/FW Revision = %x %x\n",cid->hwrev, cid->fwrev);
445 cid->hwrev = cid->fwrev = 0; /* null terminate string */
446 printf("Product Name = %s\n",cid->name);
447 printf("Serial Number = %02x%02x%02x\n",
448 cid->sn[0], cid->sn[1], cid->sn[2]);
449 printf("Month = %d\n",cid->month);
450 printf("Year = %d\n",1997 + cid->year);
452 /* fill in device description */
453 mmc_dev.if_type = IF_TYPE_MMC;
457 /* FIXME fill in the correct size (is set to 32MByte) */
459 mmc_dev.lba = 0x10000;
460 sprintf(mmc_dev.vendor,"Man %02x%02x%02x Snr %02x%02x%02x",
461 cid->id[0], cid->id[1], cid->id[2],
462 cid->sn[0], cid->sn[1], cid->sn[2]);
463 sprintf(mmc_dev.product,"%s",cid->name);
464 sprintf(mmc_dev.revision,"%x %x",cid->hwrev, cid->fwrev);
465 mmc_dev.removable = 0;
466 mmc_dev.block_read = mmc_bread;
468 /* MMC exists, get CSD too */
469 resp = mmc_cmd(MMC_CMD_SET_RCA, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R1);
470 resp = mmc_cmd(MMC_CMD_SEND_CSD, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R2);
473 mmc_csd_t *csd = (mmc_csd_t *)resp;
474 memcpy(&mmc_csd, csd, sizeof(csd));
477 /* FIXME add verbose printout for csd */
481 MMC_CLKRT = 0; /* 20 MHz */
482 resp = mmc_cmd(7, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R1);
484 fat_register_device(&mmc_dev,1); /* partitions start counting with 1 */
490 mmc_ident(block_dev_desc_t *dev)
498 /* FIXME hard codes to 32 MB device */
499 if (addr >= CFG_MMC_BASE && addr < CFG_MMC_BASE + 0x02000000)