+++ /dev/null
-/*
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-#include <common.h>
-
-#include <part.h>
-#include <mmc.h>
-
-#include <asm/io.h>
-#include <asm/errno.h>
-#include <asm/byteorder.h>
-#include <asm/arch/clk.h>
-#include <asm/arch/hardware.h>
-
-#include "atmel_mci.h"
-
-#ifdef DEBUG
-#define pr_debug(fmt, args...) printf(fmt, ##args)
-#else
-#define pr_debug(...) do { } while(0)
-#endif
-
-#ifndef CONFIG_SYS_MMC_CLK_OD
-#define CONFIG_SYS_MMC_CLK_OD 150000
-#endif
-
-#ifndef CONFIG_SYS_MMC_CLK_PP
-#define CONFIG_SYS_MMC_CLK_PP 5000000
-#endif
-
-#ifndef CONFIG_SYS_MMC_OP_COND
-#define CONFIG_SYS_MMC_OP_COND 0x00100000
-#endif
-
-#define MMC_DEFAULT_BLKLEN 512
-#define MMC_DEFAULT_RCA 1
-
-static unsigned int mmc_rca;
-static int mmc_card_is_sd;
-static block_dev_desc_t mmc_blkdev;
-
-block_dev_desc_t *mmc_get_dev(int dev)
-{
- return &mmc_blkdev;
-}
-
-static void mci_set_mode(unsigned long hz, unsigned long blklen)
-{
- unsigned long bus_hz;
- unsigned long clkdiv;
-
- bus_hz = get_mci_clk_rate();
- clkdiv = (bus_hz / hz) / 2 - 1;
-
- pr_debug("mmc: setting clock %lu Hz, block size %lu\n",
- hz, blklen);
-
- if (clkdiv & ~255UL) {
- clkdiv = 255;
- printf("mmc: clock %lu too low; setting CLKDIV to 255\n",
- hz);
- }
-
- blklen &= 0xfffc;
- mmci_writel(MR, (MMCI_BF(CLKDIV, clkdiv)
- | MMCI_BF(BLKLEN, blklen)
- | MMCI_BIT(RDPROOF)
- | MMCI_BIT(WRPROOF)));
-}
-
-#define RESP_NO_CRC 1
-#define R1 MMCI_BF(RSPTYP, 1)
-#define R2 MMCI_BF(RSPTYP, 2)
-#define R3 (R1 | RESP_NO_CRC)
-#define R6 R1
-#define NID MMCI_BF(MAXLAT, 0)
-#define NCR MMCI_BF(MAXLAT, 1)
-#define TRCMD_START MMCI_BF(TRCMD, 1)
-#define TRDIR_READ MMCI_BF(TRDIR, 1)
-#define TRTYP_BLOCK MMCI_BF(TRTYP, 0)
-#define INIT_CMD MMCI_BF(SPCMD, 1)
-#define OPEN_DRAIN MMCI_BF(OPDCMD, 1)
-
-#define ERROR_FLAGS (MMCI_BIT(DTOE) \
- | MMCI_BIT(RDIRE) \
- | MMCI_BIT(RENDE) \
- | MMCI_BIT(RINDE) \
- | MMCI_BIT(RTOE))
-
-static int
-mmc_cmd(unsigned long cmd, unsigned long arg,
- void *resp, unsigned long flags)
-{
- unsigned long *response = resp;
- int i, response_words = 0;
- unsigned long error_flags;
- u32 status;
-
- pr_debug("mmc: CMD%lu 0x%lx (flags 0x%lx)\n",
- cmd, arg, flags);
-
- error_flags = ERROR_FLAGS;
- if (!(flags & RESP_NO_CRC))
- error_flags |= MMCI_BIT(RCRCE);
-
- flags &= ~MMCI_BF(CMDNB, ~0UL);
-
- if (MMCI_BFEXT(RSPTYP, flags) == MMCI_RSPTYP_48_BIT_RESP)
- response_words = 1;
- else if (MMCI_BFEXT(RSPTYP, flags) == MMCI_RSPTYP_136_BIT_RESP)
- response_words = 4;
-
- mmci_writel(ARGR, arg);
- mmci_writel(CMDR, cmd | flags);
- do {
- udelay(40);
- status = mmci_readl(SR);
- } while (!(status & MMCI_BIT(CMDRDY)));
-
- pr_debug("mmc: status 0x%08x\n", status);
-
- if (status & error_flags) {
- printf("mmc: command %lu failed (status: 0x%08x)\n",
- cmd, status);
- return -EIO;
- }
-
- if (response_words)
- pr_debug("mmc: response:");
-
- for (i = 0; i < response_words; i++) {
- response[i] = mmci_readl(RSPR);
- pr_debug(" %08lx", response[i]);
- }
- pr_debug("\n");
-
- return 0;
-}
-
-static int mmc_acmd(unsigned long cmd, unsigned long arg,
- void *resp, unsigned long flags)
-{
- unsigned long aresp[4];
- int ret;
-
- /*
- * Seems like the APP_CMD part of an ACMD has 64 cycles max
- * latency even though the ACMD part doesn't. This isn't
- * entirely clear in the SD Card spec, but some cards refuse
- * to work if we attempt to use 5 cycles max latency here...
- */
- ret = mmc_cmd(MMC_CMD_APP_CMD, 0, aresp,
- R1 | NCR | (flags & OPEN_DRAIN));
- if (ret)
- return ret;
- if ((aresp[0] & (R1_ILLEGAL_COMMAND | R1_APP_CMD)) != R1_APP_CMD)
- return -ENODEV;
-
- ret = mmc_cmd(cmd, arg, resp, flags);
- return ret;
-}
-
-static unsigned long
-mmc_bread(int dev, unsigned long start, lbaint_t blkcnt,
- void *buffer)
-{
- int ret, i = 0;
- unsigned long resp[4];
- unsigned long card_status, data;
- unsigned long wordcount;
- u32 *p = buffer;
- u32 status;
-
- if (blkcnt == 0)
- return 0;
-
- pr_debug("mmc_bread: dev %d, start %lx, blkcnt %lx\n",
- dev, start, blkcnt);
-
- /* Put the device into Transfer state */
- ret = mmc_cmd(MMC_CMD_SELECT_CARD, mmc_rca << 16, resp, R1 | NCR);
- if (ret) goto out;
-
- /* Set block length */
- ret = mmc_cmd(MMC_CMD_SET_BLOCKLEN, mmc_blkdev.blksz, resp, R1 | NCR);
- if (ret) goto out;
-
- pr_debug("MCI_DTOR = %08lx\n", mmci_readl(DTOR));
-
- for (i = 0; i < blkcnt; i++, start++) {
- ret = mmc_cmd(MMC_CMD_READ_SINGLE_BLOCK,
- start * mmc_blkdev.blksz, resp,
- (R1 | NCR | TRCMD_START | TRDIR_READ
- | TRTYP_BLOCK));
- if (ret) goto out;
-
- ret = -EIO;
- wordcount = 0;
- do {
- do {
- status = mmci_readl(SR);
- if (status & (ERROR_FLAGS | MMCI_BIT(OVRE)))
- goto read_error;
- } while (!(status & MMCI_BIT(RXRDY)));
-
- if (status & MMCI_BIT(RXRDY)) {
- data = mmci_readl(RDR);
- /* pr_debug("%x\n", data); */
- *p++ = data;
- wordcount++;
- }
- } while(wordcount < (mmc_blkdev.blksz / 4));
-
- pr_debug("mmc: read %u words, waiting for BLKE\n", wordcount);
-
- do {
- status = mmci_readl(SR);
- } while (!(status & MMCI_BIT(BLKE)));
-
- putc('.');
- }
-
-out:
- /* Put the device back into Standby state */
- mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, NCR);
- return i;
-
-read_error:
- mmc_cmd(MMC_CMD_SEND_STATUS, mmc_rca << 16, &card_status, R1 | NCR);
- printf("mmc: bread failed, status = %08x, card status = %08lx\n",
- status, card_status);
- goto out;
-}
-
-static void mmc_parse_cid(struct mmc_cid *cid, unsigned long *resp)
-{
- cid->mid = resp[0] >> 24;
- cid->oid = (resp[0] >> 8) & 0xffff;
- cid->pnm[0] = resp[0];
- cid->pnm[1] = resp[1] >> 24;
- cid->pnm[2] = resp[1] >> 16;
- cid->pnm[3] = resp[1] >> 8;
- cid->pnm[4] = resp[1];
- cid->pnm[5] = resp[2] >> 24;
- cid->pnm[6] = 0;
- cid->prv = resp[2] >> 16;
- cid->psn = (resp[2] << 16) | (resp[3] >> 16);
- cid->mdt = resp[3] >> 8;
-}
-
-static void sd_parse_cid(struct mmc_cid *cid, unsigned long *resp)
-{
- cid->mid = resp[0] >> 24;
- cid->oid = (resp[0] >> 8) & 0xffff;
- cid->pnm[0] = resp[0];
- cid->pnm[1] = resp[1] >> 24;
- cid->pnm[2] = resp[1] >> 16;
- cid->pnm[3] = resp[1] >> 8;
- cid->pnm[4] = resp[1];
- cid->pnm[5] = 0;
- cid->pnm[6] = 0;
- cid->prv = resp[2] >> 24;
- cid->psn = (resp[2] << 8) | (resp[3] >> 24);
- cid->mdt = (resp[3] >> 8) & 0x0fff;
-}
-
-static void mmc_dump_cid(const struct mmc_cid *cid)
-{
- printf("Manufacturer ID: %02X\n", cid->mid);
- printf("OEM/Application ID: %04X\n", cid->oid);
- printf("Product name: %s\n", cid->pnm);
- printf("Product Revision: %u.%u\n",
- cid->prv >> 4, cid->prv & 0x0f);
- printf("Product Serial Number: %lu\n", cid->psn);
- printf("Manufacturing Date: %02u/%02u\n",
- cid->mdt >> 4, cid->mdt & 0x0f);
-}
-
-static void mmc_dump_csd(const struct mmc_csd *csd)
-{
- unsigned long *csd_raw = (unsigned long *)csd;
- printf("CSD data: %08lx %08lx %08lx %08lx\n",
- csd_raw[0], csd_raw[1], csd_raw[2], csd_raw[3]);
- printf("CSD structure version: 1.%u\n", csd->csd_structure);
- printf("MMC System Spec version: %u\n", csd->spec_vers);
- printf("Card command classes: %03x\n", csd->ccc);
- printf("Read block length: %u\n", 1 << csd->read_bl_len);
- if (csd->read_bl_partial)
- puts("Supports partial reads\n");
- else
- puts("Does not support partial reads\n");
- printf("Write block length: %u\n", 1 << csd->write_bl_len);
- if (csd->write_bl_partial)
- puts("Supports partial writes\n");
- else
- puts("Does not support partial writes\n");
- if (csd->wp_grp_enable)
- printf("Supports group WP: %u\n", csd->wp_grp_size + 1);
- else
- puts("Does not support group WP\n");
- printf("Card capacity: %u bytes\n",
- (csd->c_size + 1) * (1 << (csd->c_size_mult + 2)) *
- (1 << csd->read_bl_len));
- printf("File format: %u/%u\n",
- csd->file_format_grp, csd->file_format);
- puts("Write protection: ");
- if (csd->perm_write_protect)
- puts(" permanent");
- if (csd->tmp_write_protect)
- puts(" temporary");
- putc('\n');
-}
-
-static int mmc_idle_cards(void)
-{
- int ret;
-
- /* Reset and initialize all cards */
- ret = mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, NULL, 0);
- if (ret)
- return ret;
-
- /* Keep the bus idle for 74 clock cycles */
- return mmc_cmd(0, 0, NULL, INIT_CMD);
-}
-
-static int sd_init_card(struct mmc_cid *cid, int verbose)
-{
- unsigned long resp[4];
- int i, ret = 0;
-
- mmc_idle_cards();
- for (i = 0; i < 1000; i++) {
- ret = mmc_acmd(SD_CMD_APP_SEND_OP_COND, CONFIG_SYS_MMC_OP_COND,
- resp, R3 | NID);
- if (ret || (resp[0] & 0x80000000))
- break;
- ret = -ETIMEDOUT;
- }
-
- if (ret)
- return ret;
-
- ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, R2 | NID);
- if (ret)
- return ret;
- sd_parse_cid(cid, resp);
- if (verbose)
- mmc_dump_cid(cid);
-
- /* Get RCA of the card that responded */
- ret = mmc_cmd(SD_CMD_SEND_RELATIVE_ADDR, 0, resp, R6 | NCR);
- if (ret)
- return ret;
-
- mmc_rca = resp[0] >> 16;
- if (verbose)
- printf("SD Card detected (RCA %u)\n", mmc_rca);
- mmc_card_is_sd = 1;
- return 0;
-}
-
-static int mmc_init_card(struct mmc_cid *cid, int verbose)
-{
- unsigned long resp[4];
- int i, ret = 0;
-
- mmc_idle_cards();
- for (i = 0; i < 1000; i++) {
- ret = mmc_cmd(MMC_CMD_SEND_OP_COND, CONFIG_SYS_MMC_OP_COND, resp,
- R3 | NID | OPEN_DRAIN);
- if (ret || (resp[0] & 0x80000000))
- break;
- ret = -ETIMEDOUT;
- }
-
- if (ret)
- return ret;
-
- /* Get CID of all cards. FIXME: Support more than one card */
- ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, R2 | NID | OPEN_DRAIN);
- if (ret)
- return ret;
- mmc_parse_cid(cid, resp);
- if (verbose)
- mmc_dump_cid(cid);
-
- /* Set Relative Address of the card that responded */
- ret = mmc_cmd(MMC_CMD_SET_RELATIVE_ADDR, mmc_rca << 16, resp,
- R1 | NCR | OPEN_DRAIN);
- return ret;
-}
-
-static void mci_set_data_timeout(struct mmc_csd *csd)
-{
- static const unsigned int dtomul_to_shift[] = {
- 0, 4, 7, 8, 10, 12, 16, 20,
- };
- static const unsigned int taac_exp[] = {
- 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
- };
- static const unsigned int taac_mant[] = {
- 0, 10, 12, 13, 15, 60, 25, 30,
- 35, 40, 45, 50, 55, 60, 70, 80,
- };
- unsigned int timeout_ns, timeout_clks;
- unsigned int e, m;
- unsigned int dtocyc, dtomul;
- unsigned int shift;
- u32 dtor;
-
- e = csd->taac & 0x07;
- m = (csd->taac >> 3) & 0x0f;
-
- timeout_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
- timeout_clks = csd->nsac * 100;
-
- timeout_clks += (((timeout_ns + 9) / 10)
- * ((CONFIG_SYS_MMC_CLK_PP + 99999) / 100000) + 9999) / 10000;
- if (!mmc_card_is_sd)
- timeout_clks *= 10;
- else
- timeout_clks *= 100;
-
- dtocyc = timeout_clks;
- dtomul = 0;
- shift = 0;
- while (dtocyc > 15 && dtomul < 8) {
- dtomul++;
- shift = dtomul_to_shift[dtomul];
- dtocyc = (timeout_clks + (1 << shift) - 1) >> shift;
- }
-
- if (dtomul >= 8) {
- dtomul = 7;
- dtocyc = 15;
- puts("Warning: Using maximum data timeout\n");
- }
-
- dtor = (MMCI_BF(DTOMUL, dtomul)
- | MMCI_BF(DTOCYC, dtocyc));
- mmci_writel(DTOR, dtor);
-
- printf("mmc: Using %u cycles data timeout (DTOR=0x%x)\n",
- dtocyc << shift, dtor);
-}
-
-int mmc_legacy_init(int verbose)
-{
- struct mmc_cid cid;
- struct mmc_csd csd;
- unsigned int max_blksz;
- int ret;
-
- /* Initialize controller */
- mmci_writel(CR, MMCI_BIT(SWRST));
- mmci_writel(CR, MMCI_BIT(MCIEN));
- mmci_writel(DTOR, 0x5f);
- mmci_writel(IDR, ~0UL);
- mci_set_mode(CONFIG_SYS_MMC_CLK_OD, MMC_DEFAULT_BLKLEN);
-
- mmc_card_is_sd = 0;
-
- ret = sd_init_card(&cid, verbose);
- if (ret) {
- 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;
-}
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