490 lines
13 KiB
C
490 lines
13 KiB
C
/*
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* (C) Copyright 2003
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* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <config.h>
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#include <common.h>
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#include <mmc.h>
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#include <asm/errno.h>
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#include <asm/arch/hardware.h>
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#include <part.h>
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#ifdef CONFIG_MMC
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extern int
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fat_register_device(block_dev_desc_t *dev_desc, int part_no);
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static block_dev_desc_t mmc_dev;
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block_dev_desc_t * mmc_get_dev(int dev)
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{
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return (dev == 0) ? &mmc_dev : NULL;
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}
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/*
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* FIXME needs to read cid and csd info to determine block size
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* and other parameters
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*/
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static uchar mmc_buf[MMC_BLOCK_SIZE];
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static mmc_csd_t mmc_csd;
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static int mmc_ready = 0;
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static uchar *
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/****************************************************/
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mmc_cmd(ushort cmd, ushort argh, ushort argl, ushort cmdat)
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/****************************************************/
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{
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static uchar resp[20];
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ulong status;
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int words, i;
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debug("mmc_cmd %x %x %x %x\n", cmd, argh, argl, cmdat);
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MMC_STRPCL = MMC_STRPCL_STOP_CLK;
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MMC_I_MASK = ~MMC_I_MASK_CLK_IS_OFF;
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while (!(MMC_I_REG & MMC_I_REG_CLK_IS_OFF));
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MMC_CMD = cmd;
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MMC_ARGH = argh;
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MMC_ARGL = argl;
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MMC_CMDAT = cmdat;
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MMC_I_MASK = ~MMC_I_MASK_END_CMD_RES;
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MMC_STRPCL = MMC_STRPCL_START_CLK;
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while (!(MMC_I_REG & MMC_I_REG_END_CMD_RES));
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status = MMC_STAT;
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debug("MMC status %x\n", status);
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if (status & MMC_STAT_TIME_OUT_RESPONSE) {
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return 0;
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}
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switch (cmdat & 0x3) {
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case MMC_CMDAT_R1:
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case MMC_CMDAT_R3:
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words = 3;
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break;
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case MMC_CMDAT_R2:
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words = 8;
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break;
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default:
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return 0;
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}
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for (i = words-1; i >= 0; i--) {
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ulong res_fifo = MMC_RES;
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int offset = i << 1;
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resp[offset] = ((uchar *)&res_fifo)[0];
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resp[offset+1] = ((uchar *)&res_fifo)[1];
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}
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#ifdef MMC_DEBUG
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for (i=0; i<words*2; i += 2) {
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printf("MMC resp[%d] = %02x\n", i, resp[i]);
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printf("MMC resp[%d] = %02x\n", i+1, resp[i+1]);
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}
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#endif
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return resp;
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}
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int
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/****************************************************/
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mmc_block_read(uchar *dst, ulong src, ulong len)
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/****************************************************/
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{
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uchar *resp;
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ushort argh, argl;
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ulong status;
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if (len == 0) {
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return 0;
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}
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debug("mmc_block_rd dst %lx src %lx len %d\n", (ulong)dst, src, len);
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argh = len >> 16;
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argl = len & 0xffff;
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/* set block len */
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resp = mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1);
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/* send read command */
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argh = src >> 16;
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argl = src & 0xffff;
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MMC_STRPCL = MMC_STRPCL_STOP_CLK;
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MMC_RDTO = 0xffff;
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MMC_NOB = 1;
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MMC_BLKLEN = len;
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resp = mmc_cmd(MMC_CMD_READ_BLOCK, argh, argl,
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MMC_CMDAT_R1|MMC_CMDAT_READ|MMC_CMDAT_BLOCK|MMC_CMDAT_DATA_EN);
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MMC_I_MASK = ~MMC_I_MASK_RXFIFO_RD_REQ;
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while (len) {
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if (MMC_I_REG & MMC_I_REG_RXFIFO_RD_REQ) {
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#ifdef CONFIG_PXA27X
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int i;
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for (i=min(len,32); i; i--) {
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*dst++ = * ((volatile uchar *) &MMC_RXFIFO);
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len--;
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}
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#else
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*dst++ = MMC_RXFIFO;
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len--;
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#endif
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}
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status = MMC_STAT;
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if (status & MMC_STAT_ERRORS) {
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printf("MMC_STAT error %lx\n", status);
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return -1;
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}
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}
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MMC_I_MASK = ~MMC_I_MASK_DATA_TRAN_DONE;
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while (!(MMC_I_REG & MMC_I_REG_DATA_TRAN_DONE));
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status = MMC_STAT;
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if (status & MMC_STAT_ERRORS) {
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printf("MMC_STAT error %lx\n", status);
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return -1;
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}
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return 0;
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}
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int
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/****************************************************/
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mmc_block_write(ulong dst, uchar *src, int len)
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/****************************************************/
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{
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uchar *resp;
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ushort argh, argl;
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ulong status;
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if (len == 0) {
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return 0;
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}
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debug("mmc_block_wr dst %lx src %lx len %d\n", dst, (ulong)src, len);
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argh = len >> 16;
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argl = len & 0xffff;
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/* set block len */
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resp = mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1);
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/* send write command */
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argh = dst >> 16;
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argl = dst & 0xffff;
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MMC_STRPCL = MMC_STRPCL_STOP_CLK;
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MMC_NOB = 1;
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MMC_BLKLEN = len;
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resp = mmc_cmd(MMC_CMD_WRITE_BLOCK, argh, argl,
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MMC_CMDAT_R1|MMC_CMDAT_WRITE|MMC_CMDAT_BLOCK|MMC_CMDAT_DATA_EN);
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MMC_I_MASK = ~MMC_I_MASK_TXFIFO_WR_REQ;
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while (len) {
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if (MMC_I_REG & MMC_I_REG_TXFIFO_WR_REQ) {
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int i, bytes = min(32,len);
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for (i=0; i<bytes; i++) {
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MMC_TXFIFO = *src++;
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}
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if (bytes < 32) {
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MMC_PRTBUF = MMC_PRTBUF_BUF_PART_FULL;
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}
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len -= bytes;
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}
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status = MMC_STAT;
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if (status & MMC_STAT_ERRORS) {
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printf("MMC_STAT error %lx\n", status);
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return -1;
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}
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}
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MMC_I_MASK = ~MMC_I_MASK_DATA_TRAN_DONE;
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while (!(MMC_I_REG & MMC_I_REG_DATA_TRAN_DONE));
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MMC_I_MASK = ~MMC_I_MASK_PRG_DONE;
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while (!(MMC_I_REG & MMC_I_REG_PRG_DONE));
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status = MMC_STAT;
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if (status & MMC_STAT_ERRORS) {
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printf("MMC_STAT error %lx\n", status);
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return -1;
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}
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return 0;
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}
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int
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/****************************************************/
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mmc_read(ulong src, uchar *dst, int size)
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/****************************************************/
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{
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ulong end, part_start, part_end, part_len, aligned_start, aligned_end;
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ulong mmc_block_size, mmc_block_address;
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if (size == 0) {
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return 0;
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}
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if (!mmc_ready) {
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printf("Please initial the MMC first\n");
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return -1;
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}
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mmc_block_size = MMC_BLOCK_SIZE;
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mmc_block_address = ~(mmc_block_size - 1);
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src -= CFG_MMC_BASE;
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end = src + size;
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part_start = ~mmc_block_address & src;
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part_end = ~mmc_block_address & end;
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aligned_start = mmc_block_address & src;
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aligned_end = mmc_block_address & end;
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/* all block aligned accesses */
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debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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if (part_start) {
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part_len = mmc_block_size - part_start;
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debug("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) < 0) {
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return -1;
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}
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memcpy(dst, mmc_buf+part_start, part_len);
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dst += part_len;
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src += part_len;
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}
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debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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for (; src < aligned_end; src += mmc_block_size, dst += mmc_block_size) {
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debug("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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if ((mmc_block_read((uchar *)(dst), src, mmc_block_size)) < 0) {
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return -1;
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}
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}
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debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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if (part_end && src < end) {
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debug("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0) {
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return -1;
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}
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memcpy(dst, mmc_buf, part_end);
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}
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return 0;
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}
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int
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/****************************************************/
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mmc_write(uchar *src, ulong dst, int size)
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/****************************************************/
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{
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ulong end, part_start, part_end, part_len, aligned_start, aligned_end;
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ulong mmc_block_size, mmc_block_address;
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if (size == 0) {
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return 0;
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}
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if (!mmc_ready) {
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printf("Please initial the MMC first\n");
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return -1;
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}
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mmc_block_size = MMC_BLOCK_SIZE;
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mmc_block_address = ~(mmc_block_size - 1);
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dst -= CFG_MMC_BASE;
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end = dst + size;
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part_start = ~mmc_block_address & dst;
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part_end = ~mmc_block_address & end;
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aligned_start = mmc_block_address & dst;
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aligned_end = mmc_block_address & end;
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/* all block aligned accesses */
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debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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if (part_start) {
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part_len = mmc_block_size - part_start;
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debug("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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(ulong)src, dst, end, part_start, part_end, aligned_start, aligned_end);
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if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) < 0) {
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return -1;
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}
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memcpy(mmc_buf+part_start, src, part_len);
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if ((mmc_block_write(aligned_start, mmc_buf, mmc_block_size)) < 0) {
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return -1;
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}
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dst += part_len;
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src += part_len;
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}
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debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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for (; dst < aligned_end; src += mmc_block_size, dst += mmc_block_size) {
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debug("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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if ((mmc_block_write(dst, (uchar *)src, mmc_block_size)) < 0) {
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return -1;
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}
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}
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debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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if (part_end && dst < end) {
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debug("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
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src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
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if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0) {
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return -1;
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}
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memcpy(mmc_buf, src, part_end);
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if ((mmc_block_write(aligned_end, mmc_buf, mmc_block_size)) < 0) {
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return -1;
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}
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}
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return 0;
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}
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ulong
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/****************************************************/
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mmc_bread(int dev_num, ulong blknr, ulong blkcnt, void *dst)
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/****************************************************/
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{
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int mmc_block_size = MMC_BLOCK_SIZE;
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ulong src = blknr * mmc_block_size + CFG_MMC_BASE;
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mmc_read(src, (uchar *)dst, blkcnt*mmc_block_size);
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return blkcnt;
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}
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int
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/****************************************************/
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mmc_init(int verbose)
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/****************************************************/
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{
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int retries, rc = -ENODEV;
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uchar *resp;
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#ifdef CONFIG_LUBBOCK
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set_GPIO_mode( GPIO6_MMCCLK_MD );
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set_GPIO_mode( GPIO8_MMCCS0_MD );
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#endif
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CKEN |= CKEN12_MMC; /* enable MMC unit clock */
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#if defined(CONFIG_ADSVIX)
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/* turn on the power */
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GPCR(114) = GPIO_bit(114);
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udelay(1000);
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#endif
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mmc_csd.c_size = 0;
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MMC_CLKRT = MMC_CLKRT_0_3125MHZ;
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MMC_RESTO = MMC_RES_TO_MAX;
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MMC_SPI = MMC_SPI_DISABLE;
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/* reset */
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retries = 10;
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resp = mmc_cmd(0, 0, 0, 0);
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resp = mmc_cmd(1, 0x00ff, 0xc000, MMC_CMDAT_INIT|MMC_CMDAT_BUSY|MMC_CMDAT_R3);
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while (retries-- && resp && !(resp[4] & 0x80)) {
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debug("resp %x %x\n", resp[0], resp[1]);
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#ifdef CONFIG_PXA27X
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udelay(10000);
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#else
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udelay(50);
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#endif
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resp = mmc_cmd(1, 0x00ff, 0xff00, MMC_CMDAT_BUSY|MMC_CMDAT_R3);
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}
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/* try to get card id */
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resp = mmc_cmd(2, 0, 0, MMC_CMDAT_R2);
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if (resp) {
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/* TODO configure mmc driver depending on card attributes */
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mmc_cid_t *cid = (mmc_cid_t *)resp;
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if (verbose) {
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printf("MMC found. Card desciption is:\n");
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printf("Manufacturer ID = %02x%02x%02x\n",
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cid->id[0], cid->id[1], cid->id[2]);
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printf("HW/FW Revision = %x %x\n",cid->hwrev, cid->fwrev);
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cid->hwrev = cid->fwrev = 0; /* null terminate string */
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printf("Product Name = %s\n",cid->name);
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printf("Serial Number = %02x%02x%02x\n",
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cid->sn[0], cid->sn[1], cid->sn[2]);
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printf("Month = %d\n",cid->month);
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printf("Year = %d\n",1997 + cid->year);
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}
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/* fill in device description */
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mmc_dev.if_type = IF_TYPE_MMC;
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mmc_dev.part_type = PART_TYPE_DOS;
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mmc_dev.dev = 0;
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mmc_dev.lun = 0;
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mmc_dev.type = 0;
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/* FIXME fill in the correct size (is set to 32MByte) */
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mmc_dev.blksz = 512;
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mmc_dev.lba = 0x10000;
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sprintf(mmc_dev.vendor,"Man %02x%02x%02x Snr %02x%02x%02x",
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cid->id[0], cid->id[1], cid->id[2],
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cid->sn[0], cid->sn[1], cid->sn[2]);
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sprintf(mmc_dev.product,"%s",cid->name);
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sprintf(mmc_dev.revision,"%x %x",cid->hwrev, cid->fwrev);
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mmc_dev.removable = 0;
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mmc_dev.block_read = mmc_bread;
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/* MMC exists, get CSD too */
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resp = mmc_cmd(MMC_CMD_SET_RCA, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R1);
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resp = mmc_cmd(MMC_CMD_SEND_CSD, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R2);
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if (resp) {
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mmc_csd_t *csd = (mmc_csd_t *)resp;
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memcpy(&mmc_csd, csd, sizeof(csd));
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rc = 0;
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mmc_ready = 1;
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/* FIXME add verbose printout for csd */
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}
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}
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#ifdef CONFIG_PXA27X
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MMC_CLKRT = 1; /* 10 MHz - see Intel errata */
|
|
#else
|
|
MMC_CLKRT = 0; /* 20 MHz */
|
|
#endif
|
|
resp = mmc_cmd(7, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R1);
|
|
|
|
fat_register_device(&mmc_dev,1); /* partitions start counting with 1 */
|
|
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
mmc_ident(block_dev_desc_t *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
mmc2info(ulong addr)
|
|
{
|
|
/* FIXME hard codes to 32 MB device */
|
|
if (addr >= CFG_MMC_BASE && addr < CFG_MMC_BASE + 0x02000000) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_MMC */
|