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1aa2d074a7
Table 41 of the JEDEC standard for eMMC says that bit 31 of the command argument is obsolete when issuing the ERASE command (CMD38) on page 115 of this document: http://www.jedec.org/sites/default/files/docs/jesd84-B45.pdf The SD Card Association Physical Layer Simplified Specification also makes no mention of the use of bit 31. https://www.sdcard.org/downloads/pls/part1_410.pdf The Linux kernel distinguishes between secure (bit 31 set) and non-secure erase, and this patch copies the macro names from include/linux/mmc/core.h. Tested-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Eric Nelson <eric@nelint.com> Tested-by: Hector Palacios <hector.palacios@digi.com>
190 lines
4.1 KiB
C
190 lines
4.1 KiB
C
/*
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* Copyright 2008, Freescale Semiconductor, Inc
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* Andy Fleming
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*
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* Based vaguely on the Linux code
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <config.h>
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#include <common.h>
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#include <part.h>
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#include <div64.h>
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#include <linux/math64.h>
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#include "mmc_private.h"
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static ulong mmc_erase_t(struct mmc *mmc, ulong start, lbaint_t blkcnt)
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{
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struct mmc_cmd cmd;
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ulong end;
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int err, start_cmd, end_cmd;
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if (mmc->high_capacity) {
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end = start + blkcnt - 1;
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} else {
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end = (start + blkcnt - 1) * mmc->write_bl_len;
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start *= mmc->write_bl_len;
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}
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if (IS_SD(mmc)) {
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start_cmd = SD_CMD_ERASE_WR_BLK_START;
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end_cmd = SD_CMD_ERASE_WR_BLK_END;
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} else {
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start_cmd = MMC_CMD_ERASE_GROUP_START;
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end_cmd = MMC_CMD_ERASE_GROUP_END;
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}
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cmd.cmdidx = start_cmd;
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cmd.cmdarg = start;
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cmd.resp_type = MMC_RSP_R1;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err)
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goto err_out;
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cmd.cmdidx = end_cmd;
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cmd.cmdarg = end;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err)
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goto err_out;
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cmd.cmdidx = MMC_CMD_ERASE;
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cmd.cmdarg = MMC_ERASE_ARG;
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cmd.resp_type = MMC_RSP_R1b;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err)
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goto err_out;
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return 0;
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err_out:
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puts("mmc erase failed\n");
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return err;
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}
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unsigned long mmc_berase(int dev_num, lbaint_t start, lbaint_t blkcnt)
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{
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int err = 0;
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u32 start_rem, blkcnt_rem;
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struct mmc *mmc = find_mmc_device(dev_num);
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lbaint_t blk = 0, blk_r = 0;
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int timeout = 1000;
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if (!mmc)
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return -1;
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/*
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* We want to see if the requested start or total block count are
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* unaligned. We discard the whole numbers and only care about the
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* remainder.
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*/
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err = div_u64_rem(start, mmc->erase_grp_size, &start_rem);
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err = div_u64_rem(blkcnt, mmc->erase_grp_size, &blkcnt_rem);
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if (start_rem || blkcnt_rem)
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printf("\n\nCaution! Your devices Erase group is 0x%x\n"
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"The erase range would be change to "
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"0x" LBAF "~0x" LBAF "\n\n",
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mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1),
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((start + blkcnt + mmc->erase_grp_size)
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& ~(mmc->erase_grp_size - 1)) - 1);
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while (blk < blkcnt) {
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blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ?
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mmc->erase_grp_size : (blkcnt - blk);
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err = mmc_erase_t(mmc, start + blk, blk_r);
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if (err)
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break;
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blk += blk_r;
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/* Waiting for the ready status */
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if (mmc_send_status(mmc, timeout))
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return 0;
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}
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return blk;
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}
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static ulong mmc_write_blocks(struct mmc *mmc, lbaint_t start,
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lbaint_t blkcnt, const void *src)
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{
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struct mmc_cmd cmd;
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struct mmc_data data;
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int timeout = 1000;
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if ((start + blkcnt) > mmc->block_dev.lba) {
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printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n",
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start + blkcnt, mmc->block_dev.lba);
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return 0;
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}
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if (blkcnt == 0)
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return 0;
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else if (blkcnt == 1)
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cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
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else
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cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
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if (mmc->high_capacity)
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cmd.cmdarg = start;
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else
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cmd.cmdarg = start * mmc->write_bl_len;
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cmd.resp_type = MMC_RSP_R1;
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data.src = src;
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data.blocks = blkcnt;
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data.blocksize = mmc->write_bl_len;
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data.flags = MMC_DATA_WRITE;
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if (mmc_send_cmd(mmc, &cmd, &data)) {
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printf("mmc write failed\n");
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return 0;
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}
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/* SPI multiblock writes terminate using a special
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* token, not a STOP_TRANSMISSION request.
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*/
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if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
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cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
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cmd.cmdarg = 0;
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cmd.resp_type = MMC_RSP_R1b;
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if (mmc_send_cmd(mmc, &cmd, NULL)) {
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printf("mmc fail to send stop cmd\n");
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return 0;
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}
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}
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/* Waiting for the ready status */
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if (mmc_send_status(mmc, timeout))
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return 0;
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return blkcnt;
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}
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ulong mmc_bwrite(int dev_num, lbaint_t start, lbaint_t blkcnt, const void *src)
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{
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lbaint_t cur, blocks_todo = blkcnt;
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struct mmc *mmc = find_mmc_device(dev_num);
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if (!mmc)
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return 0;
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if (mmc_set_blocklen(mmc, mmc->write_bl_len))
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return 0;
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do {
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cur = (blocks_todo > mmc->cfg->b_max) ?
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mmc->cfg->b_max : blocks_todo;
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if (mmc_write_blocks(mmc, start, cur, src) != cur)
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return 0;
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blocks_todo -= cur;
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start += cur;
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src += cur * mmc->write_bl_len;
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} while (blocks_todo > 0);
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return blkcnt;
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}
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