upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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548 lines
13 KiB
548 lines
13 KiB
/*
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* Copyright (C) 2004-2006 Atmel Corporation
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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 <common.h>
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#include <part.h>
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#include <mmc.h>
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#include <asm/io.h>
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#include <asm/errno.h>
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#include <asm/byteorder.h>
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#include <asm/arch/clk.h>
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#include <asm/arch/memory-map.h>
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#include "atmel_mci.h"
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#ifdef DEBUG
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#define pr_debug(fmt, args...) printf(fmt, ##args)
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#else
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#define pr_debug(...) do { } while(0)
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#endif
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#ifndef CONFIG_SYS_MMC_CLK_OD
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#define CONFIG_SYS_MMC_CLK_OD 150000
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#endif
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#ifndef CONFIG_SYS_MMC_CLK_PP
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#define CONFIG_SYS_MMC_CLK_PP 5000000
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#endif
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#ifndef CONFIG_SYS_MMC_OP_COND
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#define CONFIG_SYS_MMC_OP_COND 0x00100000
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#endif
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#define MMC_DEFAULT_BLKLEN 512
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#define MMC_DEFAULT_RCA 1
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static unsigned int mmc_rca;
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static int mmc_card_is_sd;
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static block_dev_desc_t mmc_blkdev;
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block_dev_desc_t *mmc_get_dev(int dev)
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{
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return &mmc_blkdev;
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}
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static void mci_set_mode(unsigned long hz, unsigned long blklen)
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{
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unsigned long bus_hz;
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unsigned long clkdiv;
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bus_hz = get_mci_clk_rate();
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clkdiv = (bus_hz / hz) / 2 - 1;
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pr_debug("mmc: setting clock %lu Hz, block size %lu\n",
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hz, blklen);
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if (clkdiv & ~255UL) {
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clkdiv = 255;
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printf("mmc: clock %lu too low; setting CLKDIV to 255\n",
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hz);
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}
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blklen &= 0xfffc;
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mmci_writel(MR, (MMCI_BF(CLKDIV, clkdiv)
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| MMCI_BF(BLKLEN, blklen)
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| MMCI_BIT(RDPROOF)
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| MMCI_BIT(WRPROOF)));
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}
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#define RESP_NO_CRC 1
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#define R1 MMCI_BF(RSPTYP, 1)
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#define R2 MMCI_BF(RSPTYP, 2)
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#define R3 (R1 | RESP_NO_CRC)
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#define R6 R1
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#define NID MMCI_BF(MAXLAT, 0)
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#define NCR MMCI_BF(MAXLAT, 1)
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#define TRCMD_START MMCI_BF(TRCMD, 1)
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#define TRDIR_READ MMCI_BF(TRDIR, 1)
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#define TRTYP_BLOCK MMCI_BF(TRTYP, 0)
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#define INIT_CMD MMCI_BF(SPCMD, 1)
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#define OPEN_DRAIN MMCI_BF(OPDCMD, 1)
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#define ERROR_FLAGS (MMCI_BIT(DTOE) \
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| MMCI_BIT(RDIRE) \
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| MMCI_BIT(RENDE) \
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| MMCI_BIT(RINDE) \
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| MMCI_BIT(RTOE))
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static int
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mmc_cmd(unsigned long cmd, unsigned long arg,
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void *resp, unsigned long flags)
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{
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unsigned long *response = resp;
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int i, response_words = 0;
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unsigned long error_flags;
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u32 status;
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pr_debug("mmc: CMD%lu 0x%lx (flags 0x%lx)\n",
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cmd, arg, flags);
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error_flags = ERROR_FLAGS;
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if (!(flags & RESP_NO_CRC))
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error_flags |= MMCI_BIT(RCRCE);
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flags &= ~MMCI_BF(CMDNB, ~0UL);
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if (MMCI_BFEXT(RSPTYP, flags) == MMCI_RSPTYP_48_BIT_RESP)
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response_words = 1;
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else if (MMCI_BFEXT(RSPTYP, flags) == MMCI_RSPTYP_136_BIT_RESP)
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response_words = 4;
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mmci_writel(ARGR, arg);
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mmci_writel(CMDR, cmd | flags);
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do {
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udelay(40);
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status = mmci_readl(SR);
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} while (!(status & MMCI_BIT(CMDRDY)));
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pr_debug("mmc: status 0x%08x\n", status);
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if (status & error_flags) {
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printf("mmc: command %lu failed (status: 0x%08x)\n",
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cmd, status);
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return -EIO;
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}
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if (response_words)
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pr_debug("mmc: response:");
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for (i = 0; i < response_words; i++) {
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response[i] = mmci_readl(RSPR);
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pr_debug(" %08lx", response[i]);
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}
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pr_debug("\n");
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return 0;
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}
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static int mmc_acmd(unsigned long cmd, unsigned long arg,
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void *resp, unsigned long flags)
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{
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unsigned long aresp[4];
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int ret;
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/*
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* Seems like the APP_CMD part of an ACMD has 64 cycles max
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* latency even though the ACMD part doesn't. This isn't
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* entirely clear in the SD Card spec, but some cards refuse
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* to work if we attempt to use 5 cycles max latency here...
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*/
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ret = mmc_cmd(MMC_CMD_APP_CMD, 0, aresp,
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R1 | NCR | (flags & OPEN_DRAIN));
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if (ret)
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return ret;
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if ((aresp[0] & (R1_ILLEGAL_COMMAND | R1_APP_CMD)) != R1_APP_CMD)
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return -ENODEV;
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ret = mmc_cmd(cmd, arg, resp, flags);
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return ret;
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}
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static unsigned long
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mmc_bread(int dev, unsigned long start, lbaint_t blkcnt,
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void *buffer)
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{
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int ret, i = 0;
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unsigned long resp[4];
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unsigned long card_status, data;
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unsigned long wordcount;
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u32 *p = buffer;
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u32 status;
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if (blkcnt == 0)
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return 0;
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pr_debug("mmc_bread: dev %d, start %lx, blkcnt %lx\n",
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dev, start, blkcnt);
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/* Put the device into Transfer state */
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ret = mmc_cmd(MMC_CMD_SELECT_CARD, mmc_rca << 16, resp, R1 | NCR);
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if (ret) goto out;
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/* Set block length */
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ret = mmc_cmd(MMC_CMD_SET_BLOCKLEN, mmc_blkdev.blksz, resp, R1 | NCR);
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if (ret) goto out;
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pr_debug("MCI_DTOR = %08lx\n", mmci_readl(DTOR));
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for (i = 0; i < blkcnt; i++, start++) {
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ret = mmc_cmd(MMC_CMD_READ_SINGLE_BLOCK,
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start * mmc_blkdev.blksz, resp,
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(R1 | NCR | TRCMD_START | TRDIR_READ
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| TRTYP_BLOCK));
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if (ret) goto out;
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ret = -EIO;
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wordcount = 0;
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do {
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do {
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status = mmci_readl(SR);
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if (status & (ERROR_FLAGS | MMCI_BIT(OVRE)))
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goto read_error;
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} while (!(status & MMCI_BIT(RXRDY)));
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if (status & MMCI_BIT(RXRDY)) {
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data = mmci_readl(RDR);
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/* pr_debug("%x\n", data); */
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*p++ = data;
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wordcount++;
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}
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} while(wordcount < (mmc_blkdev.blksz / 4));
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pr_debug("mmc: read %u words, waiting for BLKE\n", wordcount);
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do {
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status = mmci_readl(SR);
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} while (!(status & MMCI_BIT(BLKE)));
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putc('.');
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}
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out:
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/* Put the device back into Standby state */
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mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, NCR);
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return i;
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read_error:
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mmc_cmd(MMC_CMD_SEND_STATUS, mmc_rca << 16, &card_status, R1 | NCR);
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printf("mmc: bread failed, status = %08x, card status = %08lx\n",
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status, card_status);
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goto out;
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}
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static void mmc_parse_cid(struct mmc_cid *cid, unsigned long *resp)
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{
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cid->mid = resp[0] >> 24;
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cid->oid = (resp[0] >> 8) & 0xffff;
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cid->pnm[0] = resp[0];
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cid->pnm[1] = resp[1] >> 24;
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cid->pnm[2] = resp[1] >> 16;
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cid->pnm[3] = resp[1] >> 8;
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cid->pnm[4] = resp[1];
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cid->pnm[5] = resp[2] >> 24;
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cid->pnm[6] = 0;
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cid->prv = resp[2] >> 16;
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cid->psn = (resp[2] << 16) | (resp[3] >> 16);
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cid->mdt = resp[3] >> 8;
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}
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static void sd_parse_cid(struct mmc_cid *cid, unsigned long *resp)
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{
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cid->mid = resp[0] >> 24;
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cid->oid = (resp[0] >> 8) & 0xffff;
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cid->pnm[0] = resp[0];
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cid->pnm[1] = resp[1] >> 24;
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cid->pnm[2] = resp[1] >> 16;
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cid->pnm[3] = resp[1] >> 8;
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cid->pnm[4] = resp[1];
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cid->pnm[5] = 0;
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cid->pnm[6] = 0;
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cid->prv = resp[2] >> 24;
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cid->psn = (resp[2] << 8) | (resp[3] >> 24);
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cid->mdt = (resp[3] >> 8) & 0x0fff;
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}
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static void mmc_dump_cid(const struct mmc_cid *cid)
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{
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printf("Manufacturer ID: %02X\n", cid->mid);
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printf("OEM/Application ID: %04X\n", cid->oid);
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printf("Product name: %s\n", cid->pnm);
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printf("Product Revision: %u.%u\n",
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cid->prv >> 4, cid->prv & 0x0f);
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printf("Product Serial Number: %lu\n", cid->psn);
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printf("Manufacturing Date: %02u/%02u\n",
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cid->mdt >> 4, cid->mdt & 0x0f);
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}
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static void mmc_dump_csd(const struct mmc_csd *csd)
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{
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unsigned long *csd_raw = (unsigned long *)csd;
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printf("CSD data: %08lx %08lx %08lx %08lx\n",
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csd_raw[0], csd_raw[1], csd_raw[2], csd_raw[3]);
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printf("CSD structure version: 1.%u\n", csd->csd_structure);
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printf("MMC System Spec version: %u\n", csd->spec_vers);
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printf("Card command classes: %03x\n", csd->ccc);
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printf("Read block length: %u\n", 1 << csd->read_bl_len);
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if (csd->read_bl_partial)
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puts("Supports partial reads\n");
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else
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puts("Does not support partial reads\n");
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printf("Write block length: %u\n", 1 << csd->write_bl_len);
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if (csd->write_bl_partial)
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puts("Supports partial writes\n");
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else
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puts("Does not support partial writes\n");
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if (csd->wp_grp_enable)
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printf("Supports group WP: %u\n", csd->wp_grp_size + 1);
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else
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puts("Does not support group WP\n");
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printf("Card capacity: %u bytes\n",
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(csd->c_size + 1) * (1 << (csd->c_size_mult + 2)) *
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(1 << csd->read_bl_len));
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printf("File format: %u/%u\n",
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csd->file_format_grp, csd->file_format);
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puts("Write protection: ");
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if (csd->perm_write_protect)
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puts(" permanent");
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if (csd->tmp_write_protect)
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puts(" temporary");
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putc('\n');
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}
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static int mmc_idle_cards(void)
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{
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int ret;
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/* Reset and initialize all cards */
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ret = mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, NULL, 0);
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if (ret)
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return ret;
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/* Keep the bus idle for 74 clock cycles */
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return mmc_cmd(0, 0, NULL, INIT_CMD);
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}
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static int sd_init_card(struct mmc_cid *cid, int verbose)
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{
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unsigned long resp[4];
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int i, ret = 0;
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mmc_idle_cards();
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for (i = 0; i < 1000; i++) {
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ret = mmc_acmd(SD_CMD_APP_SEND_OP_COND, CONFIG_SYS_MMC_OP_COND,
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resp, R3 | NID);
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if (ret || (resp[0] & 0x80000000))
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break;
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ret = -ETIMEDOUT;
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}
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if (ret)
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return ret;
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ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, R2 | NID);
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if (ret)
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return ret;
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sd_parse_cid(cid, resp);
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if (verbose)
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mmc_dump_cid(cid);
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/* Get RCA of the card that responded */
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ret = mmc_cmd(SD_CMD_SEND_RELATIVE_ADDR, 0, resp, R6 | NCR);
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if (ret)
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return ret;
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mmc_rca = resp[0] >> 16;
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if (verbose)
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printf("SD Card detected (RCA %u)\n", mmc_rca);
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mmc_card_is_sd = 1;
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return 0;
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}
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static int mmc_init_card(struct mmc_cid *cid, int verbose)
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{
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unsigned long resp[4];
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int i, ret = 0;
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mmc_idle_cards();
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for (i = 0; i < 1000; i++) {
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ret = mmc_cmd(MMC_CMD_SEND_OP_COND, CONFIG_SYS_MMC_OP_COND, resp,
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R3 | NID | OPEN_DRAIN);
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if (ret || (resp[0] & 0x80000000))
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break;
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ret = -ETIMEDOUT;
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}
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if (ret)
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return ret;
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/* Get CID of all cards. FIXME: Support more than one card */
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ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, R2 | NID | OPEN_DRAIN);
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if (ret)
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return ret;
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mmc_parse_cid(cid, resp);
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if (verbose)
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mmc_dump_cid(cid);
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/* Set Relative Address of the card that responded */
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ret = mmc_cmd(MMC_CMD_SET_RELATIVE_ADDR, mmc_rca << 16, resp,
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R1 | NCR | OPEN_DRAIN);
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return ret;
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}
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static void mci_set_data_timeout(struct mmc_csd *csd)
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{
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static const unsigned int dtomul_to_shift[] = {
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0, 4, 7, 8, 10, 12, 16, 20,
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};
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static const unsigned int taac_exp[] = {
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1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
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};
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static const unsigned int taac_mant[] = {
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0, 10, 12, 13, 15, 60, 25, 30,
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35, 40, 45, 50, 55, 60, 70, 80,
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};
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unsigned int timeout_ns, timeout_clks;
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unsigned int e, m;
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unsigned int dtocyc, dtomul;
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unsigned int shift;
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u32 dtor;
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e = csd->taac & 0x07;
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m = (csd->taac >> 3) & 0x0f;
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timeout_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
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timeout_clks = csd->nsac * 100;
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timeout_clks += (((timeout_ns + 9) / 10)
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* ((CONFIG_SYS_MMC_CLK_PP + 99999) / 100000) + 9999) / 10000;
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if (!mmc_card_is_sd)
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timeout_clks *= 10;
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else
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timeout_clks *= 100;
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dtocyc = timeout_clks;
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dtomul = 0;
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shift = 0;
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while (dtocyc > 15 && dtomul < 8) {
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dtomul++;
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shift = dtomul_to_shift[dtomul];
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dtocyc = (timeout_clks + (1 << shift) - 1) >> shift;
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}
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if (dtomul >= 8) {
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dtomul = 7;
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dtocyc = 15;
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puts("Warning: Using maximum data timeout\n");
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}
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dtor = (MMCI_BF(DTOMUL, dtomul)
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| MMCI_BF(DTOCYC, dtocyc));
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mmci_writel(DTOR, dtor);
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printf("mmc: Using %u cycles data timeout (DTOR=0x%x)\n",
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dtocyc << shift, dtor);
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}
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int mmc_init(int verbose)
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{
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struct mmc_cid cid;
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struct mmc_csd csd;
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unsigned int max_blksz;
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int ret;
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/* Initialize controller */
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mmci_writel(CR, MMCI_BIT(SWRST));
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mmci_writel(CR, MMCI_BIT(MCIEN));
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mmci_writel(DTOR, 0x5f);
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mmci_writel(IDR, ~0UL);
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mci_set_mode(CONFIG_SYS_MMC_CLK_OD, MMC_DEFAULT_BLKLEN);
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mmc_card_is_sd = 0;
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ret = sd_init_card(&cid, verbose);
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if (ret) {
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|
mmc_rca = MMC_DEFAULT_RCA;
|
|
ret = mmc_init_card(&cid, verbose);
|
|
}
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Get CSD from the card */
|
|
ret = mmc_cmd(MMC_CMD_SEND_CSD, mmc_rca << 16, &csd, R2 | NCR);
|
|
if (ret)
|
|
return ret;
|
|
if (verbose)
|
|
mmc_dump_csd(&csd);
|
|
|
|
mci_set_data_timeout(&csd);
|
|
|
|
/* Initialize the blockdev structure */
|
|
mmc_blkdev.if_type = IF_TYPE_MMC;
|
|
mmc_blkdev.part_type = PART_TYPE_DOS;
|
|
mmc_blkdev.block_read = mmc_bread;
|
|
sprintf((char *)mmc_blkdev.vendor,
|
|
"Man %02x%04x Snr %08lx",
|
|
cid.mid, cid.oid, cid.psn);
|
|
strncpy((char *)mmc_blkdev.product, cid.pnm,
|
|
sizeof(mmc_blkdev.product));
|
|
sprintf((char *)mmc_blkdev.revision, "%x %x",
|
|
cid.prv >> 4, cid.prv & 0x0f);
|
|
|
|
/*
|
|
* If we can't use 512 byte blocks, refuse to deal with the
|
|
* card. Tons of code elsewhere seems to depend on this.
|
|
*/
|
|
max_blksz = 1 << csd.read_bl_len;
|
|
if (max_blksz < 512 || (max_blksz > 512 && !csd.read_bl_partial)) {
|
|
printf("Card does not support 512 byte reads, aborting.\n");
|
|
return -ENODEV;
|
|
}
|
|
mmc_blkdev.blksz = 512;
|
|
mmc_blkdev.lba = (csd.c_size + 1) * (1 << (csd.c_size_mult + 2));
|
|
|
|
mci_set_mode(CONFIG_SYS_MMC_CLK_PP, mmc_blkdev.blksz);
|
|
|
|
#if 0
|
|
if (fat_register_device(&mmc_blkdev, 1))
|
|
printf("Could not register MMC fat device\n");
|
|
#else
|
|
init_part(&mmc_blkdev);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mmc_read(ulong src, uchar *dst, int size)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int mmc_write(uchar *src, ulong dst, int size)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int mmc2info(ulong addr)
|
|
{
|
|
return 0;
|
|
}
|
|
|