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drivers/mmc/mmc_write.c
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/* * Copyright 2008, Freescale Semiconductor, Inc * Andy Fleming * * Based vaguely on the Linux code * * SPDX-License-Identifier: GPL-2.0+ */ #include <config.h> #include <common.h> #include <part.h> #include "mmc_private.h" static ulong mmc_erase_t(struct mmc *mmc, ulong start, lbaint_t blkcnt) { struct mmc_cmd cmd; ulong end; int err, start_cmd, end_cmd; if (mmc->high_capacity) { end = start + blkcnt - 1; } else { end = (start + blkcnt - 1) * mmc->write_bl_len; start *= mmc->write_bl_len; } if (IS_SD(mmc)) { start_cmd = SD_CMD_ERASE_WR_BLK_START; end_cmd = SD_CMD_ERASE_WR_BLK_END; } else { start_cmd = MMC_CMD_ERASE_GROUP_START; end_cmd = MMC_CMD_ERASE_GROUP_END; } cmd.cmdidx = start_cmd; cmd.cmdarg = start; cmd.resp_type = MMC_RSP_R1; err = mmc_send_cmd(mmc, &cmd, NULL); if (err) goto err_out; cmd.cmdidx = end_cmd; cmd.cmdarg = end; err = mmc_send_cmd(mmc, &cmd, NULL); if (err) goto err_out; cmd.cmdidx = MMC_CMD_ERASE; cmd.cmdarg = SECURE_ERASE; cmd.resp_type = MMC_RSP_R1b; err = mmc_send_cmd(mmc, &cmd, NULL); if (err) goto err_out; return 0; err_out: puts("mmc erase failed "); return err; } unsigned long mmc_berase(int dev_num, lbaint_t start, lbaint_t blkcnt) { int err = 0; struct mmc *mmc = find_mmc_device(dev_num); lbaint_t blk = 0, blk_r = 0; int timeout = 1000; if (!mmc) return -1; if ((start % mmc->erase_grp_size) || (blkcnt % mmc->erase_grp_size)) printf(" Caution! Your devices Erase group is 0x%x " "The erase range would be change to " "0x" LBAF "~0x" LBAF " ", mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1), ((start + blkcnt + mmc->erase_grp_size) & ~(mmc->erase_grp_size - 1)) - 1); while (blk < blkcnt) { blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ? mmc->erase_grp_size : (blkcnt - blk); err = mmc_erase_t(mmc, start + blk, blk_r); if (err) break; blk += blk_r; /* Waiting for the ready status */ if (mmc_send_status(mmc, timeout)) return 0; } return blk; } static ulong mmc_write_blocks(struct mmc *mmc, lbaint_t start, lbaint_t blkcnt, const void *src) { struct mmc_cmd cmd; struct mmc_data data; int timeout = 1000; if ((start + blkcnt) > mmc->block_dev.lba) { printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ") ", start + blkcnt, mmc->block_dev.lba); return 0; } if (blkcnt == 0) return 0; else if (blkcnt == 1) cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK; else cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK; if (mmc->high_capacity) cmd.cmdarg = start; else cmd.cmdarg = start * mmc->write_bl_len; cmd.resp_type = MMC_RSP_R1; data.src = src; data.blocks = blkcnt; data.blocksize = mmc->write_bl_len; data.flags = MMC_DATA_WRITE; if (mmc_send_cmd(mmc, &cmd, &data)) { printf("mmc write failed "); return 0; } /* SPI multiblock writes terminate using a special * token, not a STOP_TRANSMISSION request. */ if (!mmc_host_is_spi(mmc) && blkcnt > 1) { cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION; cmd.cmdarg = 0; cmd.resp_type = MMC_RSP_R1b; if (mmc_send_cmd(mmc, &cmd, NULL)) { printf("mmc fail to send stop cmd "); return 0; } } /* Waiting for the ready status */ if (mmc_send_status(mmc, timeout)) return 0; return blkcnt; } ulong mmc_bwrite(int dev_num, lbaint_t start, lbaint_t blkcnt, const void *src) { lbaint_t cur, blocks_todo = blkcnt; struct mmc *mmc = find_mmc_device(dev_num); if (!mmc) return 0; if (mmc_set_blocklen(mmc, mmc->write_bl_len)) return 0; do { |
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cur = (blocks_todo > mmc->cfg->b_max) ? mmc->cfg->b_max : blocks_todo; |
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if (mmc_write_blocks(mmc, start, cur, src) != cur) return 0; blocks_todo -= cur; start += cur; src += cur * mmc->write_bl_len; } while (blocks_todo > 0); return blkcnt; } |